Patent Publication Number: US-2022235578-A1

Title: Device for supplying emergency power to digital door lock, and method for driving same

Description:
TECHNICAL FIELD 
     The present invention switches the connection of the battery holders provided inside the digital door lock from parallel to series or from series to parallel by rotating the door lock opening/closing means or turning the emergency switch on/off. 
     Specifically, when the battery inside the digital door lock device is discharged all, the remaining battery level provided inside the battery holder is used after the connection of the battery holder is temporarily switched from series to parallel or parallel to series. Then temporarily activate the digital door lock. 
     BACKGROUND ART 
     A digital door lock refers to a high-tech locking device that uses digitized information such as passwords, semiconductor chips, smart cards, and fingerprints as keys. 
     The digital door lock provides high convenience in that it does not need to carry a separate key, and is gradually becoming a popular locking device. 
     In addition, in recent years, the convenience of digital door locks has been improved by fusion with fingerprint recognition technology and Internet of Things (IOT) technology. 
     The digital door lock is mainly driven by the power of the battery inserted therein.
 
Therefore, the battery must be periodically replaced so that the battery inserted in the digital door lock do not discharge all.
 
     If the battery provided inside the digital door lock is not replaced and discharged all, the digital door lock cannot be driven, so that the lock device cannot be released and the front door cannot be accessed. 
     In order to solve this problem, a product that exposes terminals so that power can be supplied by contacting a battery of 9 volts (V. Volt) to the outside of the digital door lock has been released. 
     Therefore, it was possible to drive the digital door lock by receiving power from the outside when the battery of the digital door lock discharged all. 
     However, there is a problem in that the digital door lock that exposes the terminal to the outside is vulnerable to a new criminal method of unauthorized opening the digital door lock through an electric shock. 
     DETAILED DESCRIPTION OF THE INVENTION 
     Technical Problem 
     The present invention has been proposed to solve the above problems. 
     When rotating and/or moving the door lock opening/closing means upward to the digital door lock, the connection of the battery provided inside the digital door lock is changed, and the remaining battery level provided inside the battery holder is used to driving a digital door lock to improve convenience. 
     With the movement of the emergency switch provided outside the digital door lock, the connection of the battery provided inside the digital door lock is changed, and the remaining battery level provided inside the battery holder is used to driving the digital door lock to improve convenience. 
     The present invention is tough against crimes that do not expose the terminals to the outside and apply an electric shock to the external terminals. 
     By not providing any terminals on the outer surface, the digital door lock can be provided with a beautiful appearance as it is. 
     After consuming all the remaining battery power, the present invention can produce and supply electricity by itself through its own power generation means. 
     The present invention operates by supplying emergency power even with a single battery inserted in the external battery insertion holder. 
     Technical Solution 
     In order to achieve the above object, a emergency power supply for digital door lock comprising: a first battery holder capable of accommodating one or more batteries; a second battery holder capable of accommodating one or more batteries; a motor driving module connected to the other end of the first battery holder and one end of the second battery holder; a first changeover switch provided between one end of the first battery holder and the other end of the motor driving module; a second changeover switch provided between the other end of the second battery holder and one end of the motor driving module. According to the operation of the first changeover switch and the second changeover switch, connection between the first battery holder and the second battery holder is switched from parallel to series or series to parallel. 
     In this emergency power supply for digital door lock, the present invention further comprising a door lock opening/closing means for changing a connection of the first changeover switch and the second changeover switch. 
     In this emergency power supply for digital door lock, the door lock opening and closing means include the form of a handle and/or a doorknob as opening and closing means for opening and closing a door. The operation of the first changeover switch and the second changeover switch is switched according to the rotation and/or movement of the door lock opening/closing means. 
     In this emergency power supply for digital door lock, the first changeover switch and the second changeover switch operate by any of push non-locking, push lock, tact, and selector. When the door lock opening/closing means is rotated and/or moved upward, the electric contacts of the first changeover switch and the second changeover switch are switched, and the connection between the first battery holder and the second battery holder is switched. 
     In this emergency power supply for digital door lock, the first changeover switch comprises a first common terminal connected to one end of the first battery holder; a first output terminal connected to one end of the second battery holder and the other end of the motor drive module; a second output terminal. The second changeover switch comprises a second common terminal connected to the other end of the second battery holder; a third output terminal connected to the other end of the first battery holder and one end of the motor drive module; a fourth output terminal. In this emergency power supply for digital door lock, the second output terminal of the first switching switch and the fourth output terminal of the second switching switch are connected to each other. 
     In this emergency power supply for digital door lock, when the door lock opening/closing means is rotated or moved upward, the first common terminal of the first changeover switch is switched from the second output terminal to the first output terminal and connected, the second common terminal of the second changeover switch is switched from the fourth output terminal to the third output terminal. 
     In this emergency power supply for digital door lock, when the door lock opening/closing means is rotated or moved upward, the first common terminal of the first changeover switch is switched from the first output terminal to the second output terminal and connected, and the second common terminal of the second changeover switch is switched from the third output terminal to the fourth output terminal. 
     In this emergency power supply for digital door lock, the motor drive module includes a stepping motor that opens and closes the door lock lock device; a target voltage regulation circuit unit that adjusts the voltage applied from the first battery holder and the second battery holder to a predetermined voltage and supplies the voltage to the stepping motor. 
     In this emergency power supply for digital door lock, the predetermined voltage is 3 volts and/or 6 volts. 
     In this emergency power supply for digital door lock, the number of 1.5 volt batteries provided in the first battery holder is four, and the number of 1.5 volt batteries provided in the second battery holder is four. 
     In this emergency power supply for digital door lock, the number of 1.5 volt batteries provided in the first battery holder is two, and the number of 1.5 volt batteries provided in the second battery holder is two. 
     In this emergency power supply for digital door lock, the number of 1.5 volt batteries provided in the first battery holder is one, and the number of 1.5 volt batteries provided in the second battery holder is one. 
     In this emergency power supply for digital door lock, the first common terminal of the first changeover switch is switched from the second output terminal to the first output terminal, and the second common terminal of the second changeover switch is switched from the fourth output terminal to the third output terminal. Then, the connection switches from series to parallel. 
     In this emergency power supply for digital door lock, the first common terminal of the first changeover switch is switched from the first output terminal to the second output terminal, and the second common terminal of the second changeover switch is switched from the third output terminal to the fourth output terminal. Then, the connection switches from parallel to series. 
     In this emergency power supply for digital door lock, the first common terminal of the first changeover switch is connected by switching from the second output terminal to the first output terminal, and the second common terminal of the second changeover switch is switched from the fourth output terminal to the third output terminal. Then, the connection of batteries switches from series to parallel. This step is then performed when the door lock opening/closing means rotates and/or moves upward. 
     In this emergency power supply for digital door lock, the first common terminal of the first changeover switch is connected by switching from the first output terminal to the second output terminal, and the second common terminal of the second changeover switch is switched from the third output terminal to the fourth output terminal. Then, the connection of batteries switches from parallel to series. This step is then performed when the door lock opening/closing means rotates and/or moves upward. 
     In this emergency power supply for digital door lock, the first common terminal of the first changeover switch is connected by switching from the second output terminal to the first output terminal, and the second common terminal of the second changeover switch is switched from the fourth output terminal to the third output terminal. Then, the connection of batteries switches from series to parallel. After that, electric power is applied to the motor drive module from the first output terminal of the first changeover switch and the third output terminal of the second changeover switch. 
     In this emergency power supply for digital door lock, the first common terminal of the first changeover switch is connected by switching from the first output terminal to the second output terminal, and the second common terminal of the second changeover switch is switched from the third output terminal to the fourth output terminal. Then, the connection of batteries switches from parallel to series. After that, electric power is applied to the motor drive module from the second output terminal of the first changeover switch and the fourth output terminal of the second changeover switch. 
     In this emergency power supply for digital door lock, after power is applied to the motor drive module from the first output terminal of the first changeover switch and the third output terminal of the second changeover switch, the voltage becomes a predetermined voltage by the target voltage regulation circuit unit of the motor drive module. 
     In this emergency power supply for digital door lock, after power is applied to the motor drive module from the second output terminal of the first changeover switch and the fourth output terminal of the second changeover switch, the voltage becomes a predetermined voltage by the target voltage regulation circuit unit of the motor drive module. 
     A emergency power supply for digital door lock comprising: a first battery holder capable of accommodating at least one battery; a second battery holder that can accommodate one or more batteries; a motor drive module connected to the other end of the first battery holder and one end of the second battery holder; a first changeover switch provided between one end of the first battery holder and the other end of the motor drive module; a second changeover switch provided between the other end of the second battery holder and one end of the motor drive module; a password input unit for entering a password; a internal circuit unit determines whether the entered password matches the default password and if the password entered matches the predetermined password, power is supplied to the motor drive module. Depending on the operation of the first switching switch and the second switching switch, the connection between the first battery holder and the second battery holder is switched from parallel to series or in series in parallel. 
     A driving method of a emergency power supply for digital door lock comprising: switching from series to parallel by switching a first common terminal of a first changeover switch from a second output terminal to a first output terminal, switching a second common terminal of a second changeover switch from a fourth output terminal to a third output terminal; Entering password in a password input unit; determining, by an internal circuit unit, whether or not the password entered from the password input unit matches; supplying, by the internal circuit unit, power to the motor drive module, when the password entered from the password input unit matches. 
     A driving method of a emergency power supply for digital door lock comprising: switching from series to parallel by switching a first common terminal of a first changeover switch from a second output terminal to a first output terminal, switching a second common terminal of a second changeover switch from a third output terminal to a fourth output terminal; entering password in a password input unit; determining, by a internal circuit unit, whether or not the password entered from the password input unit matches; supplying, by the internal circuit unit, power to the motor drive module, when the password entered from the password input unit matches. 
     A emergency power supply for digital door lock comprising: a first battery holder capable of accommodating at least one battery; a second battery holder that can accommodate one or more batteries; a motor drive module connected to the other end of the first battery holder and one end of the second battery holder; a first changeover switch provided between one end of the first battery holder and the other end of the motor drive module; a second changeover switch provided between the other end of the second battery holder and one end of the motor drive module; a password input unit for entering a password; a internal circuit unit is powered to the motor drive module, if the password entered in the password input unit matches the predetermined password. 
     A driving method of a emergency power supply for digital door lock comprising: switching from series to parallel by switching a first common terminal of a first changeover switch from a second output terminal to a first output terminal, switching a second common terminal of a second changeover switch from a fourth output terminal to a third output terminal; entering password in a password input unit; determining, by a internal circuit unit, whether or not the password entered from the password input unit matches; supplying, by the internal circuit unit, power to the motor drive module, when the password entered from the password input unit matches. 
     A driving method of a emergency power supply for digital door lock comprising: switching from series to parallel by switching a first common terminal of a first changeover switch from a second output terminal to a first output terminal, switching a second common terminal of a second changeover switch from a third output terminal to a fourth output terminal; entering password in a password input unit; determining, by a internal circuit unit, whether or not the password entered from the password input unit matches; supplying, by the internal circuit unit, power to the motor drive module, when the password entered from the password input unit matches. 
     A emergency power supply for digital door lock comprising: a first battery holder that can accommodate one or more batteries, a second battery holder that can accommodate one or more batteries; a motor drive module that includes a target voltage regulation circuit unit and a latch bolt operating unit; a series-parallel changeover switch module that switches the electrical connection between the first battery holder and the second battery holder from series to parallel or from parallel to series; a target voltage regulation circuit selection switch module that adjusts the target voltage regulation circuit unit so that it is selectively applied in the process in which the voltage output from the first battery holder and the second battery holder is applied to the latch bolt regulating unit. 
     In this emergency power supply for digital door lock, the series-parallel changeover switch module includes a first switch, a second switch, and a third switch. One end of the first switch is connected to the other end of the first battery holder, the other end of the first switch is connected to the other end of the second battery holder, one end of the second switch is connected to one end of the first battery holder, the other end of the second switch is connected to one end of the second battery holder, one end of the third switch is connected to the other end of the first battery holder, and the other end of the third switch is connected to the other end of the second battery holder. 
     In this emergency power supply for digital door lock, the electrical connection between the first battery holder and the second battery holder is switched from series to parallel by opening the first switch, shorting the second switch, and shorting the third switch. 
     In this emergency power supply for digital door lock, the electrical connection between the first battery holder and the second battery holder is switched from parallel to series by shorting the first switch, opening the second switch, and opening the third switch. 
     In this emergency power supply for digital door lock, the target voltage regulating circuit selection switch module includes a fourth switch, a fifth switch, a sixth switch, and a seventh switch, one end of the fourth switch is connected to one end of the first battery holder, the other end of the fourth switch is connected to the first input terminal of the target voltage adjustment circuit unit, one end of the fifth switch is connected to the other end of the second battery holder, the other end of the fifth switch is connected to the second input terminal of the target voltage adjustment circuit unit, one end of the sixth switch is connected to the other end of the second battery holder, the other end of the sixth switch is connected to the second input terminal of the latch bolt actuating module, one end of the seventh switch is connected to one end of the first battery holder, and the other end of the seventh switch is connected to the first input of the latch bolt actuating module. 
     In this emergency power supply for digital door lock, the series-parallel changeover switch module switches the electrical connection between the first battery holder and the second electric holder from series to parallel, the fourth switch is shorted, the fifth switch is shorted, the sixth switch is opened, the second switch is opened, and the seventh switch The switch is opened. 
     In this emergency power supply for digital door lock, when the series-parallel changeover switch module switches the electrical connection between the first battery holder and the second electric holder from parallel to series, the fourth switch is opened, the fifth switch is opened, the sixth switch is shorted, the second switch is shorted, and the seventh switch is shorted. 
     In this emergency power supply for digital door lock, the series-parallel changeover switch module is operated by a door lock opening/closing means or an external emergency switch. 
     In this emergency power supply for digital door lock, the series-parallel changeover switch module switches the electrical connection between the first battery holder and the second battery holder from series to parallel or from parallel to series each time the door lock opening/closing means rotates in the direction opposite to the direction in which the door is opened. 
     In this emergency power supply for digital door lock, the series-parallel changeover switch module switches the electrical connection between the first battery holder and the second battery holder from series to parallel while maintaining the state in which the door lock opening/closing means is rotated in the direction opposite to the direction in which the door is opened. 
     In this emergency power supply for digital door lock, the target voltage regulation circuit selection switch module is operated by door lock opening/closing means or an external emergency switch. 
     In this emergency power supply for digital door lock, the target voltage regulation circuit selection switch module toggles each time the door lock opening/closing means rotates in the direction opposite to the direction in which the door is opened, and when the series-parallel changeover switch module switches the electrical connection between the first battery holder and the second battery holder from series to parallel, the target voltage regulation circuit selection switch module apply the output voltage from the first battery holder and the second battery holder to the latch bolt operating unit via the target voltage regulation circuit unit. 
     In this emergency power supply for digital door lock, the target voltage regulation circuit selection switch module apply the output voltage from the first battery holder and the second battery holder to the latch bolt operating unit via the target voltage regulation circuit unit while maintaining the state in which the door lock opening/closing means rotates in the direction opposite to the direction in which the door is opened. 
     In this emergency power supply for digital door lock, further comprising a external power switch module. When inserting a battery into the external battery insertion holder, the external power switch module replaces one of the batteries in the second battery holder with a battery inserted in the external battery insertion holder, connects the batteries in the second battery holder and the battery inserted in the external battery insertion holder in series, or selects only the battery of the external battery insertion holder as the power source applied to the latch bolt operating unit. 
     In this emergency power supply for digital door lock, the external power switch module includes a tenth switch and an eleventh switch. One end of the tenth switch is connected to the other end of the second battery holder, the other end of the tenth switch is connected to the second input end of the latch bolt operating part, one end of the eleventh switch is connected to the positive electrode of one of the batteries in the second battery holder, and the other end of the eleventh switch is connected to one end of the external battery insertion holder. 
     In this emergency power supply for digital door lock, the external power switch module includes a tenth switch and an eleventh switch. One end of the tenth switch is connected to the other end of the second battery holder, the other end of the tenth switch is connected to the second input end of the latch bolt operating unit, one end of the eleventh switch is connected to the other end of the second battery holder, and the other end of the eleventh switch is connected to one end of the external battery insertion holder. 
     In this emergency power supply for digital door lock, the external power switch module includes a tenth switch and an eleventh switch, one end of the tenth switch is connected to one end of the first battery holder, the other end of the tenth switch is connected to one end of the seventh switch module of the target voltage regulation circuit selection switch module, the other end of the eleventh switch is connected to one end of the seventh switch, and one end of the eleventh switch is connected to one end of the external battery insertion holder. 
     In this emergency power supply for digital door lock, the external power switch module includes a tenth switch and an eleventh switch. One end of the tenth switch is connected to the other end of the seventh switch module of the target voltage regulating circuit unit, the other end of the tenth switch is connected to the first input terminal of the target voltage regulating circuit unit, one end of the eleventh switch is connected to one end of the external battery insertion holder, and the other end of the eleventh switch is connected to the first input terminal of the target voltage regulating circuit unit. 
     In this emergency power supply for digital door lock, the other end of the external battery insertion holder is connected to the second input end of the latch bolt operating unit. 
     In this emergency power supply for digital door lock, when the battery is inserted into the external battery insertion holder, the tenth switch is opened and the eleventh switch is shorted. 
     In this emergency power supply for digital door lock, when the battery is removed from the external battery insertion holder, the tenth switch is shorted and the eleventh switch is opened. 
     A driving method of a emergency power supply for digital door lock comprising steps of: 
     (a) switching, by a series-parallel changeover switch module, the electrical connection between a first battery holder and a second battery holder from series to parallel or from parallel to series; 
     (b) applying the voltage of the first battery holder and the second battery holder is transferred to a latch bolt operating unit via a target voltage regulating circuit unit, when the electrical connection between the first battery holder and the second battery holder is connected in series in parallel; 
     (c) applying the voltages of the first battery holder and the second battery holder to the latch bolt operating unit, when the electrical connection between the first battery holder and the second battery holder is connected in parallel in series. 
     In this driving method of the emergency power supply for digital door lock, step (a) includes: operating the series-parallel changeover switch module, by the door lock opening/closing means or an external emergency switch. 
     In this driving method of the emergency power supply for digital door lock, step (b) is completed by operating the target voltage operation circuit selection switch module, by door lock opening/closing means or an external emergency switch. 
     A driving method of a emergency power supply for digital door lock comprising steps of: Inserting the battery into the external battery insertion holder; replacing, the external power switch module, one of the batteries in the first battery holder or the second battery holder with a battery inserted in the external battery insertion holder, or connecting in series, by the external power switch module, the battery in the first battery holder or the second battery holder, and the battery inserted in the external battery insertion holder. 
     A driving method of a emergency power supply for digital door lock comprising steps of: (1) Inserting the battery into the external battery insertion holder; (2) replacing, by the external power switch module, one of the batteries in the second battery holder with the battery inserted in the external battery insertion holder, or (3) connecting, by the external power switch module, the battery in the second battery holder and the battery inserted in the external battery insertion holder in series, or (4) selecting, by the external power switch module, the battery in the external battery insertion holder as the power source for the latch bolt operating unit. 
     In this driving method of the emergency power supply for digital door lock, the first battery holder contains one or more batteries, the second battery holder contains one or more batteries, the series-parallel changeover switch module includes a first switch, a second switch, and a third switch, one end of the first switch is connected to the other end of the first battery holder, the other end of the first switch is connected to one end of the second battery holder, one end of the second switch is connected to one end of the first battery holder, the other end of the second switch is connected to one end of the second battery holder, one end of the third switch is connected to the other end of the first battery holder, the other end of the third switch is connected to the other end of the second battery holder, the target voltage regulation circuit selection switch module includes a fourth switch, a fifth switch, a sixth switch, and a seventh switch, one end of the fourth switch is connected to one end of the first battery holder, the other end of the fourth switch is connected to the first input terminal of the target voltage regulation circuit unit, one end of the fifth switch is connected to the other end of the second battery holder, the other end of the fifth switch is connected to the second input terminal of the target voltage regulation circuit unit, one end of the sixth switch is connected to the other end of the second battery holder, the other end of the sixth switch is connected to the second input terminal of the latch bolt operating unit, one end of the seventh switch is connected to one end of the first battery holder, the other end of the seventh switch is connected to the first input terminal of the latch bolt operating unit. 
     In this driving method of the emergency power supply for digital door lock, wherein step (1), the electrical connection between the first battery holder and the second battery holder is switched from series to parallel by opening the first switch, shorting the second switch, and shorting the third switch. 
     In this driving method of the emergency power supply for digital door lock, wherein step (a), the electrical connection between the first battery holder and the second battery holder is switched from parallel to series by shorting the first switch, opening the second switch, and opening the third switch. 
     In this driving method of the emergency power supply for digital door lock, step (b) is completed by shorting the fourth switch, shorting the fifth switch, opening the seventh switch. In this driving method of the emergency power supply for digital door lock, step (c) is completed by opening the fourth switch, opening the fifth switch, shorting the seventh switch. 
     In this driving method of the emergency power supply for digital door lock, the series-parallel changeover switch module switches (toggles) the electrical connection between the first battery holder and the second battery holder from series to parallel or from parallel to series each time the door lock opening/closing means rotates in the direction opposite to the direction in which the door is opened. 
     In this driving method of the emergency power supply for digital door lock, the series-parallel changeover switch module switches (toggles) the electrical connection between the first battery holder and the second battery holder from series to parallel or from parallel to series while the door lock opening/closing means rotates in the direction opposite to the direction in which the door is opened. 
     In this driving method of the emergency power supply for digital door lock, the series-parallel changeover switch module switches the electrical connection between the first battery holder and the second battery holder from series to parallel while maintaining the state in which the door lock opening/closing means is rotated in the direction opposite to the direction in which the door is opened. 
     In this driving method of the emergency power supply for digital door lock, the target voltage regulation circuit selection switch module toggles each time the door lock opening/closing means rotates in the direction opposite to the direction in which the door is opened. When the series-parallel changeover switch module switches the electrical connection between the first battery holder and the second battery holder from series to parallel, the voltage output from the first battery holder and the second battery holder apply to the latch bolt operating unit via the target voltage regulation circuit unit. 
     In this driving method of the emergency power supply for digital door lock, the target voltage regulation circuit selection switch module supply the voltage output from the first battery holder and the second battery holder to the latch bolt operating unit via the target voltage regulation circuit unit, while maintaining the state in which the door lock opening/closing means rotates in the direction opposite to the direction in which the door is opened. 
     In this driving method of the emergency power supply for digital door lock, the external power switch module includes a tenth switch and an eleventh switch, one end of the tenth switch is connected to the other end of the second battery holder, the other end of the tenth switch is connected to the second input end of the latch bolt operating unit, one end of the eleventh switch is connected to the positive electrode of one of the batteries in the second battery holder, the other end of the eleventh switch is connected to one end of the external battery insertion holder. 
     In this driving method of the emergency power supply for digital door lock, the external power switch module includes a tenth switch and an eleventh switch, one end of the tenth switch is connected to the other end of the second battery holder, the other end of the tenth switch is connected to the second input end of the latch bolt operating unit, one end of the eleventh switch is connected to the other end of the second battery holder, and the other end of the eleventh switch is connected to one end of the external battery insertion holder. 
     In this driving method of the emergency power supply for digital door lock, the external power switch module includes a tenth switch and an eleventh switch, one end of the tenth switch is connected to one end of the first battery holder, the other end of the tenth switch is connected to one end of the fourth switch of the target voltage adjustment circuit selection switch module, the other end of the eleventh switch is connected to one end of the fourth switch, and one end of the eleventh switch is connected to one end of the external battery insertion holder. 
     In this driving method of the emergency power supply for digital door lock, the other end of the external battery insertion holder is connected to the second input end of the latch bolt operating unit. 
     In this driving method of the emergency power supply for digital door lock, steps (2) to (4) are completed by opening the tenth switch, shorting the eleventh switch. 
     In this emergency power supply for digital door lock, The present invention includes a first battery holder capable of accommodating one or more batteries; A second battery holder that can accommodate one or more batteries; a motor drive module that includes a target voltage regulation circuit unit and a latch bolt operating unit; a series-parallel changeover switch module that switches the connection between the first battery holder and the second battery holder from series to parallel or from parallel to series; a target voltage regulating circuit selection switch module that selectively applies the target voltage regulation circuit unit in the process of applying the voltage output from the first battery holder and the second battery holder to the latch bolt operating unit. The target voltage regulating circuit selection switch module includes a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, and a ninth switch. One end of the fourth switch is connected to one end of the first battery holder, the other end of the fourth switch is connected to the first input terminal of the target voltage regulation circuit unit, and one end of the fifth switch is connected to the other end of the second battery holder. The other end of the fifth switch is connected to the second input terminal of the target voltage regulation circuit unit, one end of the sixth switch is connected to the other end of the second battery holder, and the other end of the sixth switch is connected to the second input terminal of the latch bolt operating unit. One end of the seventh switch is connected to one end of the first battery holder, the other end of the seventh switch is connected to the first input terminal of the latch bolt operating portion, and one end of the eighth switch is connected to the first input terminal of the latch bolt operating unit. The other end of the eighth switch is connected to the first output end of the target voltage regulation circuit unit, the other end of the nineth switch is connected to the second input end of the latch bolt operating section, and the other end of the nineth switch is connected to the second output terminal of the target voltage regulation circuit unit. When the series-parallel changeover switch module switches the connection between the first battery holder and the second electric holder from series to parallel, the eighth switch is shorted and the ninth switch is shorted. 
     In this emergency power supply for digital door lock, when the series-parallel changeover switch module switches the connection between the first battery holder and the second electric holder from parallel to series, the eighth switch is opened and the ninth switch is opened. 
     In this emergency power supply for digital door lock, the series-parallel switch module switches (toggles) the electrical connection between the first battery holder and the second battery holder from series to parallel or from parallel to series each time the external emergency switch enters the emergency mode. 
     In this emergency power supply for digital door lock, the series-parallel switch module switches the connection between the first battery holder and the second battery holder from series to parallel while the external emergency switch maintains the emergency mode. 
     In this emergency power supply for digital door lock, the target voltage regulation circuit selection switch module toggles every time the external emergency switch goes into emergency mode. Each time the series-parallel changeover switch module makes the connection between the first battery holder and the second battery holder in series or in parallel, the voltage output from the first battery holder and the second battery holder is applied to the latch bolt operating portion via the target voltage regulation circuit unit. 
     In this emergency power supply for digital door lock, while the external emergency switch maintains the emergency mode, the target voltage regulation circuit selection switch module applies the voltage output from the first battery holder and the second battery holder to the latch bolt operating unit via the target voltage regulation circuit unit. 
     The present invention includes an external battery insertion holder; a external power switch module, when inserting a battery into the external battery insertion holder, the external power switch module replaces one of the batteries in the first battery holder or the second battery holder with a battery inserted in the external battery insertion holder, connects the batteries in the first battery holder or the second battery holder and the battery inserted in the external battery insertion holder in series. 
     The present invention includes a external battery insertion holder; a external power switch module, when inserting a battery into the external battery insertion holder, the external power switch module replaces one of the batteries in the second battery holder with a battery inserted in the external battery insertion holder, connects the batteries in the second battery holder and the battery inserted in the external battery insertion holder in series, or selects only the battery of the external battery insertion holder as the power source applied to the latch bolt operating unit. 
     The present invention further comprises a charging battery connected in parallel with the external battery insertion holder; an emergency power generator that supplies power to the charging battery. 
     The emergency power generation unit includes a piezoelectric element. 
     A driving method of the emergency power supply for digital door lock comprising steps of: (i) switching, by a series-parallel changeover switch module, the electrical connection between a first battery holder and a second battery holder from series to parallel or from parallel to series; (ii) applying the voltage of the first battery holder and the second battery holder is transferred to a latch bolt operating unit via a target voltage regulating circuit unit, when the electrical connection between the first battery holder and the second battery holder is connected in series in parallel; (iii) applying the voltages of the first battery holder and the second battery holder to the latch bolt operating unit, when the electrical connection between the first battery holder and the second battery holder is connected in parallel in series. The target voltage regulation circuit selection switch module includes a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, and a ninth switch. One end of the fourth switch is connected to one end of the first battery holder, and the other end of the fourth switch is connected to the first input terminal of the target voltage regulation circuit unit. One end of the fifth switch is connected to the other end of the second battery holder, and the other end of the fifth switch is connected to the second input terminal of the target voltage regulation circuit unit. One end of the sixth switch is connected to the other end of the second battery holder, the other end of the sixth switch is connected to the second input terminal of the latch bolt operating unit, and one end of the seventh switch is connected to one end of the first battery holder. The other end of the seventh switch is connected to the first input terminal of the latch bolt operating unit, one end of the eighth switch is connected to the first input end of the latch bolt actuating portion, and the other end of the eighth switch is connected to the first output end of the target voltage regulation circuit unit, and the other end of the ninth switch is connected to the second input of the latch bolt operating portion, and one end of the ninth switch is connected to the second output of the target voltage regulation circuit portion. 
     In this driving method of the emergency power supply for digital door lock, step (i) is completed by operating the series-parallel switch module that the door lock opening/closing means or an external emergency switch operates. 
     In this driving method of the emergency power supply for digital door lock, step (ii) is completed by operating the target voltage regulation circuit selection switch module that door lock opening/closing means or an external emergency switch operates. 
     A driving method of the emergency power supply for digital door lock comprising steps of: operating the emergency power generation unit; charging a rechargeable battery connected in parallel with the external battery insertion holder. 
     In this driving method of the emergency power supply for digital door lock, step (ii) is completed by shorting the eighth switch, shorting the ninth switch. 
     In this driving method of the emergency power supply for digital door lock, step (iii) is completed by opening the eighth switch, opening the ninth switch. 
     In this driving method of the emergency power supply for digital door lock, the series-parallel switch module switches the connection between the first battery holder and the second battery holder from series to parallel or from parallel to series each time the emergency switch is put into the emergency mode. 
     In this driving method of the emergency power supply for digital door lock, the series-parallel switch module switches the connection between the first battery holder and the second battery holder from series to parallel while the external emergency switch maintains the emergency mode. 
     In this driving method of the emergency power supply for digital door lock, the target voltage regulation circuit selection switch module toggles every time the emergency switch goes into emergency mode, and the series-parallel selection switch module apply the voltage output from the first battery holder and the second battery holder to the latch bolt operating unit via the target voltage operation circuit unit. 
     In this driving method of the emergency power supply for digital door lock, the voltage output from the first battery holder and the second battery holder apply to the latch bolt operating unit via the target voltage regulation circuit unit. 
     In this driving method of the emergency power supply for digital door lock, the emergency power generation unit is a piezoelectric element. 
     Effects of the Invention 
     According to the present invention of an emergency power supply for digital door lock and driving method same, the following effects are obtained. 
     First, in the present invention, by not exposing the input terminal to the outside, there is an effect of preventing the criminal method of opening the digital door lock by electric shock. 
     Second, in the present invention, when the battery provided inside the digital door lock is discharged, a method of using the remaining amount of the internal battery by switching the connection method of the battery provided inside without having an external terminal can be used. There is an effect of improving convenience in using the digital door lock. In addition, even in case the battery cannot be activated due to a cold wave or other reasons, it is possible to achieve the effect of supplying sufficient power for the door lock to operate by changing the connection method of the battery. 
     Third, in the present invention, there is an effect that can provide a beautiful and practical appearance as it is in the current digital door lock market where a touch screen is the trend by not having any terminals on the outer surface. 
     Fourth, by temporarily switching the connection of the battery holder provided inside the digital door lock according to a preferred embodiment of the present invention from series to parallel to increase the amount of current, it is possible to ensure the operation of the motor driving module and at the same time reduce the loss of energy. there is an effect. 
     Fifth, since more batteries can be accommodated inside the battery holder provided inside the digital door lock according to another embodiment of the present invention, the use time and replacement cycle are extended, and at the same time, the connection between the battery holders is temporarily It has the effect of ensuring the emergency operation of the motor drive module by increasing the voltage by converting it from parallel to series. 
     Sixth, in the present invention, by rotating the door lock opening/closing means provided in the emergency power supply for digital door lock, the change of the battery holder connection method according to the discharge of the battery and the function of always opening and closing the door according to the rotation direction are performed at the same time. It has the effect of improving convenience. 
     Seventh, in the present invention, as the connection method of the first battery holder and the second battery holder is switched from series to parallel or from parallel to series, there is an effect of increasing the battery life. 
     Eighth, in the case of the emergency power supply for digital door lock according to a further embodiment having an external battery insertion holder, even when the remaining amount of the internal battery is exhausted, the operating power is supplied to the digital door lock by inserting the battery into the external battery insertion holder. That is, by inserting a 1.5 volt battery into the external battery insertion holder, it is possible to supply emergency power to operate the digital door lock. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a diagram showing a conventional digital door lock installed on a front door. 
         FIG. 2  is a diagram showing a state of the digital door lock provided on the outside of the entrance door and a state of the digital door lock provided on the inside of the entrance door. 
         FIG. 3  is a diagram showing a conventional invention in which a digital door lock is driven by a terminal exposed to the outside when the battery is discharged. 
         FIG. 4  is a diagram showing a conventional digital door lock invented in preparation for a criminal method using an external terminal. 
         FIG. 5  shows the circuit of the emergency power supply for digital door lock according to the first embodiment of the present invention. 
         FIG. 6  shows the outer surface of a conventional digital door lock and the outer surface of the emergency power supply for digital door lock of the present invention. 
         FIG. 7  shows driving of the emergency power supply for digital door lock by rotation of a door lock opening/closing means which is a component of the emergency power supply for digital door lock of the present invention. 
         FIG. 8  shows the state of the components of the first changeover switch and the second changeover switch of the emergency power supply for digital door lock according to the first embodiment of the present invention. 
         FIG. 9  shows a driving method of the door lock opening/closing means when the first changeover switch and the second changeover switch of the emergency power supply for digital door lock of the present invention are adopted by the push lock, the push non-lock, and the tact. 
         FIG. 10  shows a driving process of the emergency power supply for digital door lock according to the first embodiment of the present invention. 
         FIG. 11  shows a circuit diagram in which the first battery holder and the second battery holder of the emergency power supply for digital door lock according to the first embodiment of the present invention are connected in parallel. 
         FIG. 12  shows a circuit diagram of the emergency power supply for digital door lock according to a second embodiment of the present invention. 
         FIG. 13  shows the movement of the door lock opening/closing means of the emergency power supply for digital door lock according to the second embodiment of the present invention and the driving process of the emergency power supply for digital door lock. 
         FIG. 14  is a circuit diagram in which the first battery holder and the second battery holder of the emergency power supply for digital door lock according to the second embodiment of the present invention are connected in series. 
         FIG. 15  shows a circuit of the emergency power supply for digital door lock according to a third embodiment of the present invention. 
         FIG. 16  shows the outer surface of the emergency power supply for digital door lock with an emergency switch according to a third embodiment of the present invention. 
         FIG. 17  shows a component of a motor drive module which is a component of the emergency power supply for digital door lock of the present invention. 
         FIG. 18  shows the configuration of a password input unit and an internal circuit unit, which are components of the emergency power supply for digital door lock of the present invention. 
         FIG. 19  shows a circuit diagram of the emergency power supply for digital door lock to a fourth embodiment of the present invention. 
         FIG. 20  shows a state in which the first battery holder and the second battery holder of the digital door lock emergency power supply device according to the fourth embodiment of the present invention are switched in series. 
         FIG. 21  shows a state in which the first battery holder and the second battery holder of the emergency power supply for digital door lock according to the fourth embodiment of the present invention are switched in parallel. 
         FIG. 22  shows how the emergency power supply for digital door lock according to the fourth embodiment of the present invention employs an emergency switch. 
         FIG. 23  shows the driving of an emergency switch provided in the emergency power supply for digital door lock according to a fourth embodiment of the present invention. 
         FIG. 24  shows a circuit diagram of the emergency power supply for digital door lock according to a fifth embodiment of the present invention. 
         FIG. 25  shows a circuit diagram of the emergency power supply for digital door lock according to another embodiment of the fifth embodiment of the present invention. 
         FIG. 26  shows a circuit diagram of the emergency power supply for digital door lock according to a sixth embodiment of the present invention. 
         FIG. 27  shows a circuit diagram of the emergency power supply for digital door lock according to another embodiment of the sixth embodiment of the present invention. 
         FIG. 28  is a diagram showing the outer surface of the emergency power supply for digital door lock according to the fourth to sixth embodiments of the present invention. 
         FIG. 29  shows the motor driving module provided in the emergency power supply for digital door lock according to the fourth to sixth embodiments of the present invention. 
         FIG. 30  shows a driving procedure of the emergency power supply for digital door lock according to the first embodiment of the present invention. 
         FIG. 31  shows a driving procedure of the emergency power supply for digital door lock according to a second embodiment of the present invention. 
         FIG. 32  shows a driving procedure of the emergency power supply for digital door lock according to a third embodiment of the present invention. 
         FIG. 33  shows a driving procedure of the emergency power supply for digital door lock according to the fourth embodiment of the present invention. 
         FIG. 34  shows a procedure in which the emergency power supply for digital door lock according to the fifth and sixth embodiments of the present invention is driven by an external battery holder. 
         FIG. 35  shows a drive procedure using an external power drive switch for the emergency power supply for digital door lock according to the fifth and sixth embodiments of the present invention. 
         FIG. 36  shows a driving procedure of a motor drive module which is a component of the emergency power supply for digital door lock of the present invention. 
         FIG. 37  shows a driving procedure of a password input unit and an internal circuit unit, which are components of the emergency power supply for digital door lock of the present invention. 
     
    
    
     BEST MODE FOR CARRYING OUT THE INVENTION 
     Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention can be modified in various ways and can have various forms, but specific embodiments are exemplified in the drawings and described in detail in the text. However, it should be understood that this is not intended to limit the invention to any particular form of disclosure, but to include all modifications, equivalents to alternatives within the idea and technology of the invention. Further, in the description of the present invention, terms such as “first” and “second” are used only for the purpose of distinguishing a certain component from other components, and are not used to limit the meaning. And the singular representation includes multiple representations, unless there is a clear contextual meaning, and terms such as “contain” or “have” are the features, numbers, steps, actions, described in the specification. It is intended to specify the existence of a component, part, or combination thereof, of one or more other features, numbers, steps, actions, components, parts, or a combination thereof. It should be understood that we do not preclude the possibility of existence or addition. 
       FIG. 1  is a diagram showing a conventional digital door lock installed on a front door. 
     The digital door lock  10  is a device that opens and closes a door by utilizing digitized information such as a password, a semiconductor chip, a smart card, a fingerprint, and has an advantage that it is not necessary to carry a key separately. Furthermore, since a separate key is not required, there is an effect that crimes due to key duplication can be prevented. Thanks to this, it tends to be used as a means of locking the front door of the most popular homes. In addition, the convenience of the digital door lock  10  is further improved by fusing with the latest technologies such as bluetooth and fingerprint recognition technology. 
     For the preferred explanation,  FIG. 2A  shows the state of the digital door lock  10  provided on the outside of the entrance door, and  FIG. 2B  shows the state of the digital door lock  10  provided on the inside of the entrance door. 
       FIG. 2A  shows a state of the digital door lock  10  provided on the outside of the entrance door, and the digital door lock  10  is configured to include a handle  20  for opening and closing the entrance door. Therefore, the digital door lock  10  is configured so that the user can open and close the door by using the handle  20  after inputting a preset password. 
       FIG. 2B  shows the state of the digital door lock  10  provided inside the entrance, in which the battery insertion unit  50  into which the battery  30  can be inserted and the digital door lock  10  are opened and closed by mechanical operation. The manual open/close button  60  can consist of a latch bolt  80  that opens and closes the door by projecting from the digital door lock  10  or engaging inside the digital door lock device  10 . According to  FIG. 2B , the digital door lock  10  is designed so that the battery  30  can be replaced only inside the front door. Therefore, when the battery  30  is discharged, the battery cannot be replaced outside the entrance gate. When the drive of the digital door lock  10  is stopped due to the discharge of the battery  30 , a situation may occur in which the entrance door in which the digital door lock  10  is installed cannot be opened or closed. 
       FIG. 3  is a diagram showing a conventional invention in which a digital door lock is driven by a terminal exposed to the outside when the battery is discharged. 
     Considering the problem that the battery  30  provided inside the digital door lock  10  is discharged and the digital door lock  10  cannot be opened or closed outside the entrance door, the external terminal  70  is used for the digital door lock device  10  was developed. When the 9 volt battery  30  is coupled to the digital door lock  10  provided with the external terminal  70 , power is temporarily supplied and the digital door lock  10  can be temporarily driven. Therefore, the discomfort that may be experienced when the internal battery  30  of the digital door lock  10  is discharged has been eliminated. However, many new types of criminal cases have occurred in which the digital door lock  10  is opened endlessly after an electric shock is applied to the external terminal  70  provided on the outer surface of the digital door lock  10 . This became a problem for security. 
       FIG. 4  is a diagram showing a conventional digital door lock device invented in preparation for a criminal method using an external terminal. 
       FIG. 4A  shows a digital door lock device  10  using a card (key) terminal  90 , and  FIG. 4B  shows a section in which an external terminal  70  is inserted with a separate lid (C). 
     A criminal method of giving an electric shock to an external terminal of a digital door lock  10  is widely known. Therefore, a form A in which a card key type terminal is used instead of a method in which a 9-volt battery is brought into contact with an external terminal has been devised, and a form B in which a section in which the external terminal  70  is inserted is opened and closed to protect it from the outside was devised. However, the form A of the digital door lock  10  using the card key terminal  90  is not practical in that a separate tool must be carried. In the form B in which a separate lid C is provided in the section where the terminal is inserted to protect it from the outside, the section in which the external terminal  70  is inserted can be easily exposed. Therefore, neither method was effective in preventing new crime methods. As can be seen from  FIG. 4 , the above-mentioned digital door lock  10  was able to prevent the difficulty that occurs when the battery  30  provided inside the digital door lock  10  is discharged in an unexpected situation. And, it triggered damage caused by new crime methods. Therefore, it is an object of the present invention to invent the digital door lock  10  which can solve the problem generated when the battery  30  provided inside the digital door lock  10  is discharged and prevent a new kind of criminal technique. 
       FIG. 5  shows the circuit of the emergency power supply for digital door lock according to the first embodiment of the present invention. 
     The emergency power supply for digital door lock  100  of the present invention is an invention devised by improving the above-mentioned problems. The emergency power supply for digital door lock  100  includes a first battery holder  600 , a second battery holder  700 , a motor drive module  500 , a first changeover switch  300 , and a second changeover switch  400 . The motor drive module  700  is connected to the other end of the first battery holder  600  and one end of the second battery holder  700 . The first battery holder  600  can accommodate one or more batteries  30 , and the second battery holder  700  can accommodate one or more batteries  30 . One or more batteries  30  having a voltage of 1.5 volts can be inserted into the first battery holder  600  and the second battery holder  700 . The battery  30  may be a dry battery which is a primary battery or a storage battery which is a secondary battery. Further, the predetermined voltage for driving the motor drive module  500  can be supplied with a voltage value of 3 volts or 6 volts. In the description of the emergency power supply for digital door lock  100  according to  FIG. 5 , two batteries  30  are provided in each of the first battery holder  600  and the second battery holder  700 , and provides 6 volts. 
     Further, the door lock opening/closing means  200  for switching the electrical contact between the first changeover switch  300  and the second changeover switch  400  can be included. The door lock opening/closing means  200  is configured in the form of a lever and the form of a handle, and can be configured to rotate in the vertical direction. The connection between the first battery holder  600  and the second battery holder  700  can be switched from series to parallel according to the rotation of the door lock opening/closing means  200 . The form of the door lock opening/closing means  200  can be configured in various forms. The most ideal form of the door lock opening/closing means  200  may be in the form of a lever, and the emergency power supply for digital door lock  100  may be driven as it rotates upward. 
     The emergency power supply for digital door lock  100  according to the present invention includes a function of using the remaining amount of the battery  30  provided inside the emergency power supply for digital door lock  100  only by rotating the door lock opening/closing means  200 . Therefore, unlike the conventional digital door lock device  10 , it is not necessary to separately configure the external terminal  70  on the outer surface in order to obtain temporary power. Further, by not exposing the external terminal  70 , it can be expected to have an effect of preventing a criminal method of attempting to invade a house by applying an electric impact to the external terminal  70  and impairing the function of the digital door lock  10 . At the same time, when the battery  30  provided inside is discharged, the remaining amount of the battery  30  can be effectively utilized to temporarily provide the power for driving the emergency power supply for digital door lock  100  of the present invention. 
       FIG. 6  shows the outer surface of a conventional digital door lock and the outer surface of the emergency power supply for digital door lock of the present invention. 
     For the preferred description of the present invention,  FIG. 6A  shows the outer surface of a conventional digital door lock, and  FIG. 6B  shows the outer surface of the emergency power supply for digital door lock  100  of the present invention. The emergency power supply for digital door lock  100  according to the present invention does not have to include the external terminal  70 , unlike the outer surface of the invention of the conventional digital door lock  10 . 
     Further, when the battery  30  inside the emergency power supply for digital door lock  100  is discharged, the connection method between the battery holders is switched by the door lock opening/closing means  200 , and the remaining amount of the internal battery  30  can be used. That is, power can be temporarily applied to operate the digital door lock  10  even if emergency power is not supplied by a component such as the external terminal  70 . Therefore, the emergency power supply for digital door lock  100  of the present invention is configured not to have a terminal on the outer surface, and can provide the beautiful appearance of the touch screen as it is. 
       FIG. 7  shows driving of the emergency power supply for digital door lock by rotation of a door lock opening/closing means which is a component of the emergency power supply for digital door lock of the present invention. It was described that “The most ideal form of the door lock opening/closing means  200  may be in the form of a lever, and the emergency power supply for digital door lock  100  may be driven as it rotates upward. Therefore, an example of the case where the door lock opening/closing means  200  is in the form of a lever will be described. 
       FIG. 7A  shows how the door lock opening/closing means  200  rotates upward, and  FIG. 7B  shows how the door lock opening/closing means  200  rotates downward. The emergency power supply for digital door lock  100  of the present invention is similar to the digital door lock  10  in that the door lock opening/closing means  200  is normally rotated downward to open the door. However, when normal driving is difficult due to the discharge of the battery  30  provided inside, the battery connection method is switched so that the remaining amount of the battery  30  can be used by rotating the door lock opening/closing means  200  upward. This part is different from the conventional digital door lock  10 . Further, when the remaining amount of the battery  30  is driven, the door lock opening/closing means  200  can be moved and driven so as to be easy for the user to use. 
       FIG. 8  shows the state of the components of the first changeover switch and the second changeover switch of the emergency power supply for digital door lock according to the first embodiment of the present invention. 
     For the preferred description of the present invention,  FIG. 8A  shows the first changeover switch  300  and the second changeover switch  400 , and  FIG. 8B  shows a configuration constituting the first changeover switch  300  and the second changeover switch  400 . 
     The contacts of the first changeover switch  300  and the second changeover switch  400  according to  FIG. 8A  are switched according to the rotation of the door lock opening/closing means  200 . Then, by switching the contact between the first changeover switch  300  and the second changeover switch  400 , the connection method between the first battery holder  600  and the second battery holder  700  is switched. 
     The first changeover switch  300  includes a first common terminal  320 , a first output terminal  350 , and a second output terminal  370 . Further, the first common terminal  320  of the first changeover switch  300  is connected to one end of the first battery holder  600 , and is connected to the other ends of the motor drive module  500  and the second battery holder  700 . 
     Further, the second changeover switch  400  can include a second common terminal  420 , a third output terminal  450 , and a fourth output terminal  470 . The second common terminal  420  of the second changeover switch  400  is connected to the other end of the second battery holder  700 , and the third output terminal  450  is the other end of the first battery holder  600  and one end of the motor drive module  500 . The second output terminal  370  of the first changeover switch  300  and the fourth output terminal  370  of the second changeover switch  300  may be connected to each other. 
       FIG. 9  shows a driving method of the door lock opening/closing means when the first changeover switch and the second changeover switch of the emergency power supply for digital door lock of the present invention are adopted by the push lock, the push non-lock, and the tact. The first changeover switch  300  and the second changeover switch  400  of the emergency power supply for digital door lock  100  according to the preferred embodiment of the present invention operate by any of push non-locking, push lock lock, tact, and selector. This method can proceed according to the principle of toggle switching, that is, power is transmitted to the machine by the link portion. 
       FIG. 9A  shows a driving method when the first changeover switch  300  and the second changeover switch  400  use the push lock, and  FIG. 9B  shows a driving method when the first changeover switch  300  and the first changeover switch use the tact or the push non-locking. In response to the rotation of the door lock opening/closing means  200 , the emergency power supply for digital door lock  100  of the present invention will chagne the electrical contacts of the first changeover switch  300  and the second changeover switch  400  mechanically connected to the door lock opening/closing means  200 . Therefore, when the door lock opening/closing means  200  is rotated upward, the electric contacts of the first changeover switch  300  and the second changeover switch  400  are switched. 
     When push lock is selected by the first changeover switch  300  and the second changeover switch  400  according to  FIG. 9A , the door lock opening/closing means  200  is moved upward according to FIG.  9 A 1  to convert the contact of the changeover switch. After that, the door lock opening/closing means  200  can be moved downward as in FIG.  9 A 2 . 
     However, even if the door lock opening/closing means  200  moves downward, the first changeover switch  300  and the second changeover switch  400  in the emergency power supply for digital door lock  100  are maintained in a state where the electric contacts are switched. Since electric power can be applied to the motor drive module  500 , the digital door lock emergency power supply device  100  can be normally driven. Therefore, the user can open the door by inputting a password preset in the emergency power supply for digital door lock  100 . 
     When the push-lock type switch is pressed once, the switched state is maintained, and when it is pressed again, it is converted to the original state. Therefore, the user can rotate the door lock opening/closing means  200  upward again as shown in FIG.  9 A 3  to restore the electrical contact between the first changeover switch  200  and the second changeover switch  300 . When the push lock is selected according to  FIG. 9A , the connection between the first battery holder  600  and the second battery holder  700  can be freely adjusted according to the user&#39;s selection. Therefore, the user can maintain the state in which the connection between the first battery holder  600  and the second battery holder  700  is switched until the new battery  30  is replaced with an emergency power supply for digital door lock  100 . Then, the door lock opening/closing means  200  can be rotated and/or moved upward again only after the new battery  30  is replaced, so that the holder connection can be restored, which has the effect of improving user convenience. 
     On the other hand, when tact and push non-racking are selected between the first changeover switch  300  and the second changeover switch  400  according to FIG.  9 B 1 , the user rotates the door lock opening/closing means  200  upward, and converts the electrical contact of the first changeover switch  300  and the second changeover switch  400 . The tact switch or push non-locking restores the contacts by itself. Therefore, the user of the present invention rotates and fixes the door lock opening/closing means  200  upward as shown in FIG.  9 B 2 , and maintains the switching of the electrical contact between the first changeover switch  300  and the second changeover switch  400 . Then, the emergency power supply for digital door lock  100  can be driven. 
     Then, after the password is confirmed and the latch bolt  90  is opened in the emergency power supply for digital door lock  100 , the user returns the door lock opening/closing means  200  as shown in FIG.  9 B 3  to smoothly open/close the door. 
     Such tact or push non-locking switch maintains a switching state if the pressing state, and returns to the original state when the pressing is released. Therefore, the connection between the first battery holder  600  and the second battery holder  700  can be temporarily changed according to the situation of the emergency power supply. Therefore, even if the door lock opening/closing means  200  is accidentally moved upward and/or rotated, the battery connection is immediately switched to the normal state to prevent the circuit from being overloaded. 
       FIG. 10  shows a driving process of the emergency power supply for digital door lock according to the first embodiment of the present invention. 
     For the preferred description of the present invention,  FIG. 10A  shows how the door lock opening/closing means  200  rotates upward, and  FIG. 10B  shows the electrical contacts are switched between the first changeover switch  300  and a second changeover switch  400 . Then,  FIG. 10C  shows how the electrical connection between the first battery holder  600  and the second battery holder  700  is switched to the parallel. The current is shown by a thick solid line. According to  FIG. 10A , when the door lock opening/closing means  200  of the emergency power supply for digital door lock  100  is rotated upward, the connection between the first battery holder  600  and the second battery holder  700  is switched from series to parallel. When the connection between the first battery holder  600  and the second battery holder  700  is converted from series to parallel, the strength of the current that moves to the motor drive module  500  is improved, energy loss is reduced, and the remaining battery  30  can supply. 
     When the connection of the first battery holder  600  and the second battery holder  700  is switched in parallel, the electric contact connected from the first common terminal  320  of the first changeover switch  300  is switched from the second output terminal  370  to the first output terminal  350 . Then, the electric contact connected from the second common terminal  420  of the second changeover switch  400  is switched from the fourth output terminal  470  to the third output terminal  450 . Therefore, as shown in  FIG. 10C , the connection between the first battery holder  600  and the second battery holder  700  can be switched from series to parallel. 
     In this way, all the remaining power of the battery  30  provided inside the emergency power supply for digital door lock  100  can be used according to the connection change between the first battery holder  600  and the second battery holder  700 . 
       FIG. 11  shows a circuit diagram in which the first battery holder and the second battery holder of the emergency power supply for digital door lock according to the first embodiment of the present invention are connected in parallel. 
     For the preferred description of the present invention, the movement path of the current will be described with a solid line, and the movement path without the current will be described with a broken line. The solid line shown in  FIG. 11  is the movement of the current supplied from the first battery holder  600  and the second battery holder  700  when the door lock opening/closing means  200  is rotated upward. Further, as shown in  FIG. 11 , in the emergency power supply for digital door lock  100  according to the first embodiment of the present invention, the current moves along a solid line and is transmitted to the motor drive module  500 . On the other hand, no current flows between the second output terminal  370  of the first changeover switch  300  and the fourth output terminal  470  of the second changeover switch  400 . 
       FIG. 12  shows a circuit diagram of the emergency power supply for digital door lock according to a second embodiment of the present invention. 
     In the emergency power supply for digital door lock  100  according to the second embodiment of the present invention, the number of batteries  30  housed in the first battery holder  600  is four, and the number of batteries  30  housed in the second battery holder  600  is four. It can be different from the first embodiment. Therefore, as compared with the first embodiment, the number of batteries provided inside the digital door lock  10  increases, and the replacement cycle of the battery  30  is extended. 
     Further, in the emergency power supply for digital door lock  100  according to the second embodiment of the present invention, the first battery holder  600  and the second battery holder  700 ) can be connected emergency power supply for digital door lock according to the movement and/or rotation of the door lock opening/closing means  200 . It differs from the first embodiment. 
     The emergency power supply for digital door lock  100  according to the second embodiment of the present invention converts the connection between the first battery holder  600  and the second battery holder  700  in series, and the voltage strength of the first battery holder  600  and the second battery holder  700  increases. Therefore, it provides a sufficient voltage to drive the stepping motor without driving the target voltage regulation circuit unit  550 . 
       FIG. 13  shows the movement of the door lock opening/closing means of the emergency power supply for digital door lock according to the second embodiment of the present invention and the driving process of the emergency power supply for digital door lock. 
     For the preferred description of the emergency power supply for digital door lock  100  according to the second embodiment of the present invention,  FIG. 13A  shows how the door lock opening/closing means  200  rotates upward, and  FIG. 13B  shows the electrical contact switched between the first changeover switch  300  and the second changeover switch  400 .  FIG. 13C  shows how the electrical connection between the first battery holder  600  and the second battery holder  700  is switched in series. 
     When the door lock opening/closing means  200  according to the second embodiment of the present invention is rotated upward, the connection between the first battery holder  600  and the second battery holder  700  is switched from parallel to series, and the remaining power of the battery  30  can be used, in the discharged situation. 
     Further, when the door lock opening/closing means  200  rotates upward according to  FIG. 13B , the electric contact connected from the first common terminal  320  of the first changeover switch  300  is switched to the second output terminal  370  at the first output terminal  350 . And, the electric contact connected from the second common terminal of the second changeover switch  400  is switched from the third output terminal  450  to the fourth output terminal  470 . Therefore, according to FIG. (C), the electrical movement is switched from the second output terminal  370  to the fourth output terminal  470 , and the connection between the first battery holder  600  and the second battery holder  700  is in series to supply emergency power. 
       FIG. 14  is a circuit diagram in which the first battery holder and the second battery holder of the emergency power supply for digital door lock according to the second embodiment of the present invention are connected in series. 
     For the preferred description of the present invention, the transfer of current between the first battery holder  600  and the second battery holder  700  according to the second embodiment is shown by a solid line. Then, the moving path through which the current does not flow is shown by a broken line. The solid line in  FIG. 14  is the current discharged from the first battery holder  600  and the second battery holder  700  when the door lock opening/closing means  200  is rotated upward. As shown in  FIG. 14 , the second output terminal  370  of the first changeover switch  3000  and the fourth output terminal  470  of the second changeover switch  400  are connected to each other. When the electrical contact between the first changeover switch  300  and the second changeover switch  400  is switched between the second output terminal  370  and the fourth output terminal  470 , the connection between the first battery holder  600  and the second battery holder  700  is converted in series. 
       FIG. 15  shows a circuit of the emergency power supply for digital door lock according to a third embodiment of the present invention. 
     In the emergency power supply for digital door lock  100  according to the third embodiment of the present invention, the electrical contact between the first changeover switch  300  and the second changeover switch  400  is switched by the emergency switch  250 . The emergency switch  250  according to the third embodiment of the present invention may be a slide switch or a toggle switch. However, the emergency switch according to the third embodiment of the present invention is not limited to the slide switch or the toggle switch. 
     The emergency switch  250  according to the third embodiment of the present invention is driven so that a operation unit  250 - 1  moves left and right. More specifically, when the battery  30  provided in the emergency power supply for digital door lock  100  according to the third embodiment of the present invention is discharged, the operation unit  250 - 1  of the emergency switch  250  is moved left and right as shown in FIG. Then, the connection between the first battery holder  600  and the second battery holder  700  can be switched from series to parallel or from parallel to series. 
       FIG. 16  shows the outer surface of the emergency power supply for digital door lock with an emergency switch according to a third embodiment of the present invention. 
     The connection method between the first battery holder  600  and the second battery holder  700  in the emergency power supply for digital door lock  100  according to the third embodiment of the present invention is performed in series or in parallel. The connection between the first battery holder  600  and the second battery holder  700  can be switched from series to parallel or from parallel to series according to the movement of the operation unit  250 - 1  in the emergency switch  250 . 
       FIG. 16A  shows how the emergency power supply for digital door lock  100  according to the third embodiment of the present invention includes the door lock opening/closing means  200 .  FIG. 16B  shows the form of a touch screen that is not provided with the door lock opening/closing means  200  and does not have any terminal and handle form on the outer surface. Therefore, the emergency power supply for digital door lock  100  according to the third embodiment of the present invention can provide a beautiful and practical appearance as it is. 
       FIG. 17  shows a component of a motor drive module which is a component of the emergency power supply for digital door lock of the present invention. 
     The motor drive module  500  adjusts the current transferred from the latch bolt operating unit  520 , the first battery holder  600 , and the second battery holder  700  to a predetermined voltage value. The motor drive module  500  can include a target voltage regulation circuit unit  550  that supplies a voltage to the latch bolt operating unit  520 . The motor drive module  500  of the digital door lock emergency power supply  100  of the present invention is based on the voltage of the current moving from the latch bolt actuating portion  520 , the first battery holder  600 , and the second battery holder  700 . It can consist of the configuration of the target voltage adjusting circuit unit  550  that adjusts to the set voltage value and supplies it to the latch bolt operating unit  520 . Further, the latch bolt operating unit  520  to which electric power is applied from the target voltage regulation circuit unit  550  at a preset voltage can move the latch bolt  80  inside the digital door lock device  10  to open the door. The voltage preset in the target voltage regulation circuit unit  550  is 3 volts or 6 volts, which is an appropriate voltage for driving the latch bolt operating unit  520 . 
       FIG. 18  shows the configuration of a password input unit and an internal circuit unit, which are components of the emergency power supply for digital door lock of the present invention. 
     The emergency power supply for digital door lock  100  of the present invention determines whether or not the input number received by the password input unit  800  matches the password for which the password has been set. The emergency power supply for digital door lock  100  further includes an internal circuit unit  850  that adjusts so that power is supplied to the motor drive module  500  when the preset password match the password received by the password input unit  800 . The proper voltage for driving the internal circuit unit  850  may be a preset voltage value of 3 volts. 
       FIG. 19  shows a circuit diagram of the emergency power supply for digital door lock to a fourth embodiment of the present invention. 
     The emergency power supply for digital door lock  100  according to a fourth embodiment of the present invention includes a first battery holder  600  capable of accommodating one or more batteries, and a second battery holder  700  accommodating one or more batteries. Further, the emergency power supply for digital door lock  100  can further include a series-parallel changeover switch module  220  and a voltage regulating circuit selection switch module  270 . And this part may be different from the said embodiment. 
     The series-parallel changeover switch module  220  according to  FIG. 19  includes a first switch  222 , a second switch  224 , and a third switch  226 . Looking at the connection form of the series-parallel changeover switch module  220 , one end of the first switch  222  is connected to the other end of the first battery holder  600 , and the other end of the first switch  222  is connected to one end of the second end of the second battery holder  700 . Further, one end of the second switch  224  is connected to one end of the first battery holder  600 , the other end of the second switch  224  is connected to one end of the second battery holder  700 , one end of the third switch  226  is the other end of the first battery holder  600 , and the other end of the third switch  226  is connected to the other end of the second battery holder  700 . Therefore, the connection of the first battery holder  600  and the 2nd battery holder  700  can be converted in series or from series to parallel according to the opening and shorting of the first switch  222 , the second switch  224 , and the third switch  226 . 
     Further, the voltage regulating circuit selection switch module  270  according to  FIG. 19  can include a fourth switch  271 , a fifth switch  273 , a sixth switch  275 , and a seventh switch  277 . Looking at the connection form of the voltage regulating circuit selection switch module  270 , one end of the fourth switch  271  is connected to one end of the first battery holder  600 , and the other end of the fourth switch  271  is connected to a first input terminal  552  of the target voltage regulation circuit unit  550 . Further, one end of the fifth switch  273  is connected to the other end of the second battery holder  700 , and the other end of the fifth switch  273  is connected to the second input terminal  554  of the target voltage regulation circuit unit  550 . 
     Further, one end of the sixth switch  275  is connected to one end of the second battery holder  600 , and the other end of the sixth switch  275  is connected to the second input terminal  504  of the latch bolt actuating portion  520 . Finally, one end of the seventh switch  277  is connected to one end of the first battery holder  600 , and the other end of the seventh switch  277  is connected to the first input  502  of the latch bolt operating unit  520 . 
     Therefore, in response to the opening and shorting of the fourth switch  271 , the fifth switch  273 , the sixth switch  275 , and the seventh switch  277 , the voltage output from the first battery holder  600  and the second battery holder  700  applied to the latch bolt operating unit  520 . Then, in this process, the target voltage regulation circuit unit  550  is selectively passed. 
     Further, in the voltage regulating circuit selection switch module  270 , the eighth switch  279   a  and the ninth switch  279   b  may be selectively added. One end of the eighth switch  279   a  is connected to the first input end  502  of the latch bolt operating unit  520 , and the other end of the eighth switch  279   a  is connected to the first output end  556  of the target voltage regulation circuit unit  550 . Further, one end of the nineth switch  279   b  is connected to the second output end  558  of the target voltage regulation circuit unit  550 , and the other end of the nineth switch  279   b  is connected to the second output end  504  of the latch bolt operating unit  520 . 
     Therefore, when the first battery holder  600  and the second battery holder  700  are connected in series, the current selectively flows into the target voltage regulation circuit unit  550 . Preferably, when the series-parallel changeover switch module  270  switches the first battery holder  600  and the second battery holder  700  from series to parallel, the eighth switch  279   a  and the ninth switch  279   b  are shorted. Then, the power source is applied to the latch bolt operating unit  520  via the target voltage regulating circuit unit  550 . When the series-parallel changeover switch module  270  switches the first battery holder  600  and the second battery holder  700  from parallel to series, the eighth switch  279   a  and the ninth switch  279   b  are opened. Then, the power source is directly applied to the latch bolt operating unit  520  without going through the target voltage regulating circuit portion  550 . 
       FIG. 20  shows a state in which the first battery holder and the second battery holder of the digital door lock emergency power supply device according to the fourth embodiment of the present invention are switched in series. 
     For the preferred description of the invention, the current transfer is shown by a thick solid line. The series-parallel changeover switch module  220  and the voltage regulating selection switch module  270  according to the fourth embodiment of the present invention connects a first battery holder  600  and a second battery holder in series by operating the door lock opening/closing means  200  or the emergency switch  250 . 
     The first switch  222 , the sixth switch  275 , and the seventh switch  277  of the series-parallel changeover switch module  220  according to  FIG. 20  are NC (Normally Closed) type, and are shorted (Closed) in series, and current flows through the wire. On the other hand, the second switch  224 , the third switch  226 , the fourth switch  271 , and the fifth switch  273  are NO (Normally Open) type. Therefore, in  FIG. 20 , the wires connected to the second switch  224 , the third switch  226 , the fourth switch  271 , and the fifth switch  273  are opened and no current flows. Further, when the first battery holder  600  and the second battery holder  700  are switched from parallel to series, it is not necessary to operate the target voltage regulating circuit unit  550 , and the eighth switch  279   a  and the ninth switch  279   b  immediately open. Then, the current flows through the latch bolt operating unit  520 . 
       FIG. 21  shows a state in which the first battery holder and the second battery holder of the emergency power supply for digital door lock according to the fourth embodiment of the present invention are switched in parallel. 
     The series-parallel changeover switch module  220  and the voltage regulating selection switch module  270  according to the fourth embodiment of the present invention are driven by the door lock opening/closing means  200  or the emergency switch  250 . As a result, the first battery holder  600  and the second battery holder  700  can be switched from series to parallel. As can be seen from  FIG. 21 , the first switch  222 , the sixth switch  275 , and the seventh switch  277  switch from a short-circuited state to an open state (that is, a state in which no current flows). On the other hand, the second switch  224 , the third switch  226 , the fourth switch  271 , and the fifth switch  273  switch from the open state to the short-circuit state, and current flows through the circuit. Therefore, when the first switch  222 , the sixth switch  275 , and the seventh switch  277  are opened and the second switch  224 , the third switch  226 , the fourth switch  271 , and the fifth switch  273  are shorted, the other end of the first battery holder  600  and the other end of the second battery holder  700  are connected by the third switch  226 . Then, one end of the first battery holder  600  and one end of the second battery holder  700  are switched to a parallel state in which the same poles are connected by the second switch  224 . 
     According to  FIG. 21 , the wire connected to the second switch  224  is connected to one end of the fourth switch  271 , and the other end of the fourth switch  271  is connected to the first input terminal  552  of the target voltage regulation circuit unit  550 . Further, the wire connected to the third switch  226  is connected to one end of the fifth switch  273 . The other end of the fifth switch  273  is connected to the second input terminal  554  of the target voltage regulation circuit unit  550 . Therefore, the circuit is configured to supplement the voltage according to the parallel connection between the first battery holder  600  and the second battery holder  700 . 
       FIG. 22  shows how the emergency power supply for digital door lock according to the fourth embodiment of the present invention employs an emergency switch. 
     According to the fourth embodiment of the present invention, the series switching switch module  220  and/or the voltage regulating circuit selection switch module  270  is controlled according to the operation of the emergency switch  250 . The series-parallel changeover switch module  220  includes the first switch  222 , the second switch  224 , and the third switch  226 . The voltage regulating circuit selection switch module  270  includes the fourth switch  271 , the fifth switch  273 , the sixth switch  275 , and the seventh switch  277 . 
     Therefore, a total of seven switches are provided until the connection between the first battery holder  600  and the second battery holder  700 , and the target voltage regulation circuit unit  550  are determined to be applied. Operating the seven switches individually is very impractical and can lead to increased manufacturing costs depending on the number of switches. 
     However, the emergency power supply for digital door lock  100  according to the fourth embodiment of the present invention can operate a total of seven switches at the same time by operating the emergency switch  250 . Therefore, convenience is improved. Then, since the seven switches are replaced with the emergency switch  250 , the space efficiency is improved. 
     According to  FIG. 22 , one end (a) and the other end (b) of the emergency switch  250  are separated. This means that even if the operation unit  250 - 1  inside the emergency switch  250  is connected to the wire S, the wire S, and the wire COM, one end a and the other end b are not electrically connected. For example, the wire (S) located at one end (a) and the wire (S) located at the other end (b) cannot be electrically connected. 
     However, the wire S, the wire P, and the wire COM included in one end a of the emergency switch  250  are connected to each other according to the movement of the operation unit  250 - 1 . Also, on the other end surface b are connected to the wire S and the wire COM or the wire P and the wire COM according to the movement of the operation unit  250 - 1 . 
     Like one end (a), the other end (b) of the emergency switch  250  is also connected to the wire S and the wire COM or the wire P and the wire COM according to the movement of the operation unit  250 - 1 . 
     Further, the wire COM is electrically connected regardless of the connection between the first battery holder  600  and the second battery holder  700 . However, the wire S and the wire P may be an open circuit in which a current flows with the movement of the operation unit  250 - 1 , or a closed circuit in which a current does not flow. 
     In  FIG. 22 , the connection between the wire S located at the other end (b) of the emergency switch  250  and the wire COM means a short circuit of the first switch  222 . The connection between the wire COM and the wire P located on the other end surface of the emergency switch  250  means that the second switch  224  is opened. Further, the connection between the wire COM located at one end (a) of the emergency switch  250  and the wire P means the opening of the third switch  226 . 
     In the movement of the operation unit  250 - 1  of the emergency switch  250  described above, switching of the first switch  222 , the second switch  224 , the third switch  226 , the fourth switch  271 , the fifth switch  273 , the sixth switch  275 , and the seventh switch  277  can also be performed by the door lock opening/closing means  200 . 
       FIG. 23  shows the driving of an emergency switch provided in the emergency power supply for digital door lock according to a fourth embodiment of the present invention. 
       FIG. 23A  shows how the operation unit  250 - 1  included in the emergency switch  250  is switched from parallel to series. Then,  FIG. 23B  shows how the operation unit  250 - 1  is switched from series to parallel. 
     According to  FIG. 23 , the series-parallel changeover switch module  220  and the voltage regulating circuit selection switch module  270  can both be controlled according to one emergency switch  250 . When the operation unit  250 - 1  is moved upward according to  FIG. 23A , the wire S and the wire COM of the series-parallel changeover switch module  220  and the voltage regulating circuit selection switch module  270  are connected to each other. 
     In  FIG. 23A , this means that the wire S and the first switch  222 , the sixth switch  275 , and the seventh switch  277  included in the wire COM are shorted. The conductor P means that the operation unit  250 - 1  is not located and is not connected to the conductor COM. Therefore, the second switch  224 , the third switch  226 , the fourth switch  271 , and the fifth switch  273  located between the wire P and the wire COM are opened. As a result, the first battery holder  600  and the second battery holder  700  are switched from parallel to series. 
     In  FIG. 23B , since the operation unit  250 - 1  is not located between the wire S and the wire COM, the first switch  222 , the sixth switch  275 , and the seventh switch  277  are open. And, the second switch  224 , the third switch  226 , the fourth switch  271 , and the fifth switch  273  located between the wire P and the wire COM are shorted. Therefore, it means that the first battery holder  600  and the second battery holder  700  are switched from series to parallel. 
       FIG. 24  shows a circuit diagram of the emergency power supply for digital door lock according to a fifth embodiment of the present invention. 
       FIG. 24  shows that the emergency switch  250  described in  FIG. 23  can be applied to  FIG. 24 . In addition,  FIG. 24  further includes an external battery insertion holder  930 . After using both the remaining batteries  30  provided in the first battery holder  600  and the second battery holder  700 , the external power charging unit can be supplied power from a rechargeable battery connected in parallel with is an external battery insertion unit holder  930  located on the outer surface of the emergency power supply for digital door lock  100 . Further, when the external power drive switch  940  is pressed on the outer surface of the emergency power supply for digital door lock  100 , power can be supplied by the emergency power generation unit. The emergency power generation unit can include a piezoelectric element that generates power by itself. 
     Further, when the external battery insertion holder  930  according to  FIG. 24  is added, the external power switch module  299  can be further provided. The external power switch module  299  can include a tenth switch  299   a  and an eleventh switch  299   b . According to  FIG. 24 , one end of the tenth switch  299   a  is connected to the other end of the seventh switch  277  of the voltage regulating circuit selection switch module  270 , and the other end of the 10 switch  299   a  is connected to the first input terminal  552  of the target voltage regulation circuit  550 . Then, one end of the eleventh switch  299   b  is connected to one end of the external battery insertion holder  930 , and the other end of the eleventh switch  299   b  is connected to the first input terminal  552  of the target voltage regulation circuit  550 . 
     Therefore, the external power switch module  299  selectively distinguishes between the electric power supplied from the first battery holder  600  and the second battery holder  700  and the electric power supplied from the external battery insertion holder  930 . For example, when using both the remaining batteries of the first battery holder  600  and the second battery holder  700 , the tenth switch  299  of the external power switch module  299 , electrically connected to the first battery holder  600  and the second battery holder  700 , is opened. Then, the eleventh switch  299   b  electrically connected to the external battery insertion holder  930  is shorted, and the electrical connection between the first battery holder  600  and the second battery holder  700  is cut off. Therefore, the electric power supplied from the inserted battery  30  of the external battery insertion holder  930  is supplied from the external battery insertion holder  930  to the target voltage regulation circuit  550  via the eleventh switch  299   b.    
     On the contrary, when the battery  30  is removed from the external battery insertion holder  930 , the tenth switch  299   a  electrically connected to the first battery holder  600  and the second battery holder  700  is shorted, and The eleventh switch  299   b  connected to the external battery insertion holder  930  is opened. Therefore, power is further supplied from the external battery insertion holder  930  via the tenth switch  299   a  connected to the first battery holder  600  and the second battery holder  700 . 
     Further, it is also possible to charge the rechageable battery provided inside the emergency power supply for digital door lock  100  by the piezoelectric element of the emergency power generation unit  910 , and supply electric power to the external battery insertion holder  930 .  FIG. 25  shows a circuit diagram of the emergency power supply for digital door lock according to another embodiment of the fifth embodiment of the present invention. According to another embodiment of the fifth embodiment, one end of the tenth switch  299   a  included in the external power switch module  299  is connected to one end of the first battery holder  600 , and the other end of the tenth switch  299   a  is connected to one end of the seventh switch  277  of the voltage regulating circuit selection switch module  270 . The other end of the eleventh switch  299   b  is connected to one end of the fourth switch  271 , and one end of the eleventh switch  299   b  is connected to one end of the external battery insertion holder  930 . According to  FIG. 25 , the other end of the external battery insertion holder  930  is connected to the other end of the second battery holder  700 . 
     Therefore, when the battery  30  is inserted into the external battery insertion holder  930 , the tenth switch  299   a  opens and the eleventh switch  299   b  is shorted. That is, the power supplied from the first battery holder  600  and the second battery holder  700  is cut off, and the power supplied from the external battery insertion holder  930  is moved to the target voltage adjusting circuit unit  550 . On the contrary, when the battery  30  is removed from the external battery insertion holder  930 , the tenth switch  299   a  is shorted and the eleventh switch  299   b  is opened. Therefore, power can be supplied from the first battery holder  600  and the second battery holder  700 , and the power supplied from the first battery holder  600  and the second battery holder  700  moves to the target voltage regulation circuit unit  550 . 
       FIG. 26  shows a circuit diagram of the emergency power supply for digital door lock according to a sixth embodiment of the present invention. 
     According to  FIG. 26A , one end of the tenth switch  299   a  included in the external power switch module  299  is connected to the other end of the second battery holder  700 , and the other end of the tenth switch  299   a  is connected to the second input  504  of the latch bolt operating portion  520 . Further, one end of the 11th switch  299   b  is connected to the positive electrode (+) of one of the batteries  30  of the internal battery of the second battery holder  700 , and the other end of the 11th switch  299   b  is connected to one end of the external battery insertion holder  930 . In  FIG. 26A , the fourth battery BT 4  of the second battery holder  700  will be described with reference to the preferred description of the present invention. 
     According to  FIG. 26A , when the battery  30  is inserted into the external battery insertion holder  930  and power is supplied from the external battery insertion holder  930 , the tenth switch  299   a  of the external power switch module  299  is opened, so current can&#39;t move. Then, the eleventh switch  299   b  of the external power switch module  299  is shorted, and the fourth battery BT 4  is separated from the circuit. Therefore, the electric power supplied from the fourth battery BT 4  of the second battery holder  700  is cut off, and the electric power is supplied from the battery insertion holder  930 . 
     On the other hand, when the battery  30  is removed from the external battery insertion holder  930 , the tenth switch  299   a  is shorted and the eleventh switch  299   b  is opened. Therefore, the fourth battery BT 4  supplies power, and the external battery insertion holder  930  is separated from the circuit. 
     For the preferred explanation according to  FIG. 26 a   , the fourth battery BT 4  of the second battery holder  700  has been described as an example. However, the object is not limited to the fourth battery BT 4  of the second battery holder  700 , and the object cut out from the external battery insertion holder  930  may be the battery  30  provided in the first battery holder  600 . 
     Further, such an embodiment can be implemented as shown in  FIG. 26B . That is, the tenth switch  299   a  is provided between the third battery BT 3  and the fourth battery BT 4  of the second battery holder  700 , and one end of the eleventh switch  299   b  is connected to the anode of the fourth battery BT 4 . The other end of the eleventh switch  299   b  is connected to one end of the external battery insertion holder  930 . The effect in this case is the same as that of  FIG. 26 a    seen above. 
       FIG. 27  shows a circuit diagram of the emergency power supply for digital door lock according to another embodiment of the sixth embodiment of the present invention. 
     According to the circuit diagram shown in  FIG. 27 , one end of the tenth switch  299   a  included in the external power switch module  299  is connected to the other end of the second battery holder  700 , and the other end of the tenth switch  299   a  is connected to the second input  504  of the latch bolt operating unit  520 . Further, one end of the 11th switch  299   b  is connected to the other end of the second battery holder  700 , and the other end of the 11th switch  299   b  is connected to one end of the external battery insertion holder  910 . 
     Therefore, when the eleventh switch  299   b  of the external power switch module  299  is shorted and the tenth switch  299   a  is opened, the second battery holder  700  and the external power charging unit  910  are connected in series. Therefore, the power supply is added to the latch bolt operating unit  520 . In the external power switch module  299  according to the fifth embodiment of the present invention, the power of the external battery insertion holder  930  is added regardless of the series-parallel connection between the first battery holder  600  and the second battery holder  700 . On the other hand, when the battery  30  is removed from the external battery insertion holder  930 , the tenth switch  299   a  is shorted and the eleventh switch  299   b  is opened. The operation of such a switch can be naturally performed by inserting the battery  30  into the external battery insertion holder  930 . Then, this operation can be performed by a reed switch and a magnet. 
       FIG. 28  is a diagram showing the outer surface of the emergency power supply for digital door lock according to the fourth to sixth embodiments of the present invention. 
     The emergency power supply for digital door lock  100  according to the fourth embodiment of the present invention is different from the existing embodiment in that the external battery holder  930  and the external power drive switch  940  are provided on the outer surface. Therefore, the emergency power supply for digital door lock  100  according to the fourth embodiment of the present invention operates the emergency switch  250  to consume all the remaining amount of the battery  30  provided inside the emergency power supply for digital door lock  100 . Next, by inserting a new battery  30  into the external battery holder  930  or pressing the external power drive switch  940 , power can be supplied according to the emergency power generation unit. 
     When the external power drive switch  940  is pressed to drive the emergency power generation unit, power is generated by the piezoelectric element included in the emergency power generation unit. Then, the generated electric power is supplied to the rechageable battery provided inside the emergency power supply for digital door lock  100 . After that, the rechageable battery is connected in parallel with the external battery insertion module  930 , and the electric power of the rechageable battery flows into the external battery insertion module  930 . 
     The emergency switch  250  shown in  FIG. 28  is switched to the emergency mode E when the operation unit  250 - 1  is moved to the left, and to the constant mode O when the operation unit  250 - 1  is moved to the right. More specifically, when the operation unit  250 - 1  is moved in the emergency mode E of the emergency switch  250 , the operation unit  250 - 1  is fixed to the emergency mode E and the connection between the first battery holder  600  and the second battery holder  700  is switched. Then, when the operation unit  250 - 1  is moved to the emergency mode E of the emergency switch  250 , the operation unit  250 - 1  is switched to the emergency mode E. The switching direction to the emergency mode (E) and the constant mode (O) is limited for the preferred description of the present invention, and does not limit the moving direction. 
     In addition, as the door lock opening/closing means  200  rotates in the direction opposite to the direction in which the door is opened, the connection between the first battery holder  600  and the second battery holder  700  is converted from series to parallel or from parallel to series. 
     In response to the rotation of the door lock opening/closing means  200  or the movement of the operation unit  250 - 1  of the emergency switch  250 , the connection method with the first battery holder  600  and the second battery holder  600  is switched by any of the push non-lock, push lock, tact, and selector. This method can proceed according to the principle of toggle switching, that is, power is transmitted by the link portion. 
       FIG. 29  shows the motor driving module provided in the emergency power supply for digital door lock according to the fourth to sixth embodiments of the present invention. 
     The emergency power supply for digital door lock  100  according to  FIG. 29 , the target voltage regulation circuit unit  550  and the latch bolt operation unit  520 , in the motor drive module  500 , are driven by external the voltage regulating circuit selection switch module  270 . The voltage regulating circuit selection switch module  270  according to  FIG. 29  includes a fourth switch  271 , a fifth switch  273 , a sixth switch  275 , and a seventh switch  277 . According to  FIG. 29 , the fourth switch  271  and the fifth switch  273  are directly connected to the target voltage regulation circuit unit  550  to control the drive of the target voltage adjustment circuit unit  550 . Further, when the current flowing through the target voltage adjusting circuit unit  550  is cut off by the fourth switch  271  and the fifth switch  273 , the sixth switch  275  and the seventh switch  277  are shorted and the current is applied directly to the bolt operating unit  520 . 
     Therefore, the process in which the current passes through the target voltage regulation circuit unit  550  can be selectively adjusted. When the first battery holder  600  and the second battery holder  700  are connected in parallel, the target voltage regulation circuit unit  550  is used to supplement the voltage insufficient for the parallel connection of the batteries  30 . However, when the first battery holder  600  and the second battery holder  700  are connected in series, the voltage increases in proportion to the number of batteries  30 , so that the voltage does not need to added by the target voltage regulation circuit unit  550 . 
     Further, when the first battery holder  600  and the second battery holder  700  are connected in series, driving the target voltage regulation circuit unit  550  consumes unnecessary power. Therefore, the present invention selectively drives the target voltage regulation circuit unit  550  to save unnecessary power consumption. 
       FIG. 30  shows a driving procedure of the emergency power supply for digital door lock according to the first embodiment of the present invention. 
     In driving the emergency power supply for digital door lock  100  according to the first embodiment of the present invention, the door lock opening/closing means  200  such as a lever and a handle rotates upward (S 30 - 1 ). After that, the contact of the first changeover switch  300  is switched to the first output terminal  350  (S 30 - 2 ), and the contact of the second changeover switch  400  is switched to the third output terminal  450 . (S 30 - 3 ). Next, the connection between the first battery holder  600  and the second battery holder  700  is switched from series to parallel (S 30 - 4 ). The order in which the contact of the first changeover switch  300  switches to the first output terminal  350  (S 30 - 2 ) and the contact of the second changeover switch  400  switches to the third output terminal  450  (S 30 )- 3 ) is not fixed. The process of changing the contacts of the first changeover switch  300  and the contacts of the second changeover switch  400  can occur at the same time. According to the first embodiment of the present invention, by switching the connection between the first battery holder  300  and the second battery holder  400  from series to parallel, the remaining amount of batteries provided in the digital door lock  10  is consumed all. Further, when the connection between the first battery holder  300  and the second battery holder  400  is parallel, the current transmitted to the motor drive module  500  and the internal circuit unit  850  increases, and the power can be supplied more stably. 
       FIG. 31  shows a driving procedure of the emergency power supply for digital door lock according to a second embodiment of the present invention. 
     In the driving procedure of the emergency power supply for digital door lock  100  according to the second embodiment of the present invention, after the door lock opening/closing means  200  such as a lever or a handle is rotated upward (S 31 - 1 ), the contact of the first changeover switch  300  is switched to the second output terminal  370  (S 31 - 2 ). Then, after the contact direction of the second changeover switch  400  is switched to the fourth output terminal  470  (S 31 - 3 ), the connection between the first battery holder  600  and the second battery holder  700  is switched from parallel to serial (S 31 - 4 ). 
     As the connection method between the first battery holder  600  and the second battery holder  700  is switched in series, the available voltage can be increased. Therefore, a sufficient voltage value can be supplied to the latch bolt operating unit  520  without providing the target voltage regulation circuit unit  550 . 
       FIG. 32  shows a driving procedure of the emergency power supply for digital door lock according to a third embodiment of the present invention. 
     According to the driving procedure of the emergency power supply for digital door lock  100  according to the third embodiment of the present invention, after moving the operation unit  250 - 1  of the emergency switch  250  of the slide switch and the toggle switch (S 32 - 1 ), the contact direction of the changeover switch  300  is switched (S 32 - 2 ). The driving procedure of the digital door lock emergency power supply device  100  according to the third embodiment of the present invention is performed after moving the operation unit  250 - 1  of the emergency switch  250  in the form of a slide switch and a toggle switch (S 32 - 1 ).), The contact direction of the first changeover switch  300  is switched (S 32 - 2 ). After that, the contact direction of the second changeover switch  400  is switched (S 32 - 3 ), and the connection between the first battery holder  600  and the second battery holder  700  is switched from series to parallel or from parallel to series. (S 32 - 4 ). Further, after the connection between the first battery holder  600  and the second battery holder  700  is switched, the target voltage regulation circuit unit  500 , the password input unit  800 , and the internal circuit unit  850  are driven. 
     In the emergency power supply for digital door lock  100  according to the third embodiment of the present invention, the connection between the first battery holder  600  and the second battery holder  700  is switched in series from parallel or serial to serial by using the emergency switch  250 . This part is different from the emergency power supply for digital door lock  100  according to the first embodiment and the second embodiment of the present invention. 
       FIG. 33  shows a driving procedure of the emergency power supply for digital door lock according to the fourth embodiment of the present invention. 
     In the driving procedure of the emergency power supply for digital door lock  100  according to the fourth embodiment of the present invention, after the door lock opening/closing means  200  is rotated or the emergency switch  250  is operated (S 33 - 1 ), the series-parallel changeover switch module  220  selectively controls the electrical connection between the first battery holder  600  and the second battery holder  700  (S 33 - 2 ). After that, the voltage regulating circuit selection switch module  270  is driven according to the electrical connection between the first battery holder  600  and the second battery holder  700 , and the power supplied from the first battery holder  600  and the second battery holder  700  to the voltage regulation circuit unit  550  and the latch bolt operating unit  520  (S 33 - 3 ). Next, the voltage is boosted or stepped down to a preset voltage value through the target voltage regulation circuit unit  550  (S 33 - 4 ), and a current is applied to the latch bolt operating unit  520  (S 33 - 5 ). 
     If the connection between the first battery holder  600  and the second battery holder  700  is switched from parallel to series, it can be excluded that the target voltage regulation circuit unit  550  is stepped up or down to a preset voltage (S 33 - 4 ). After that, the connection between the first battery holder  600  and the second battery holder  700  is switched from parallel to series or from series to parallel (S 33 - 5 ). The drive order of the digital door lock emergency power supply  100  according to  FIG. 33  is not limited to the specific order as described above. Step in which the series-parallel changeover switch module  220  is driven (S 33 - 2 ) and step in which the voltage regulating circuit selection switch module  270  is driven (S 33 - 3 ) can proceed at the same time. 
       FIG. 34  shows a procedure in which the emergency power supply for digital door lock according to the fifth and sixth embodiments of the present invention is driven by an external battery holder. 
     The driving procedure according to the fifth embodiment and the sixth embodiment according to  FIG. 34  can be similarly applied to the other embodiments of the fifth embodiment and the other embodiments of the sixth embodiment. 
     When the external battery is inserted into the external battery insertion holder  930  according to  FIG. 34  (S 34 - 1 ), power is supplied from the emergency power generation unit to the external battery insertion holder  930  (S 34 - 2 ). Before inserting the external battery into the external battery insertion holder  930  (S 34 - 1 ), the connection between the first battery holder  600  and the second battery holder  700  can be switched from parallel to series or series to parallel. 
     After that, the tenth switch  299   a  of the external power switch module  299  is opened (S 34 - 3 ), and the eleventh switch  299   b  of the external power switch module  299  is shorted (S 34 - 4 ). At this step, the first battery holder  600  and the second battery holder  700  and the external battery insertion holder  930  are connected to supply additional power to the latch bolt operating unit  520 . When the external battery holder  930  is inserted, the electric power supplied from the first battery holder  600  and the second battery holder  700  is cut off, and only the electric power of the external battery holder  930  is supplied. After driving the external power switch module  299 , the target voltage regulation circuit unit  550  is driven (S 34 - 5 ), and the latch bolt operating unit  520  is driven (S 34 - 6 ). 
     The driving procedure of the emergency power supply for digital door lock  100  according to  FIG. 34  is best limited to a specific order after the external battery is inserted into the battery insertion holder  930  (S 34 - 1 ). Step in which the eleventh switch  299   b  is shorted (S 34 - 4 ) from step in which power is supplied from the emergency power generation unit (S 34 - 2 ) may be performed at the same time. 
       FIG. 35  shows a drive procedure using an external power drive switch for the emergency power supply for digital door lock according to the fifth and sixth embodiments of the present invention. 
     The driving procedure according to the fifth embodiment and the sixth embodiment according to  FIG. 35  can be similarly applied to the other embodiments of the fifth embodiment and the other embodiments of the sixth embodiment. 
     According to  FIG. 35 , an external power drive switch  940  provided on the outer surface of the emergency power supply for digital door lock  100  is driven (S 35 - 1 ). And, this may be the voltage generated by the piezoelectric element of the emergency power generation unit. After that, the electric power generated from the emergency power generation unit is supplied (S 35 - 2 ). The electric power generated from the emergency power generation unit means the electric power generated by the piezoelectric element inside the emergency power generation unit. 
     After that, the electric power generated by the emergency power generation unit is supplied to the rechargeable battery connected in parallel with the external battery insertion holder  930  (S 35 - 3 ). Therefore, the electric power generated by the piezoelectric element can be supplied to the rechargeable battery and naturally supplied to the external battery insertion holder  930  connected in parallel with the rechargeable battery. 
     The drive order when the emergency power supply for digital door lock according to 
       FIG. 35  utilizes an external power drive switch is not limited to a specific order. Several sequences can proceed at the same time. 
       FIG. 36  shows a driving procedure of a motor drive module which is a component of the emergency power supply for digital door lock of the present invention. 
     In the driving procedure of the motor drive module  500  according to  FIG. 36 , electric power is applied to the motor drive module  500  (S 36 - 1 ). After that, it is converted into a voltage value preset by the target voltage regulation circuit unit  550  (S 36 - 2 ). The electric power applied to the motor drive module  500  is applied from the first battery holder  600  and the second battery holder  700  and/or from the external battery holder  930 . Further, the voltage value preset by the target voltage regulation circuit unit  550  is adjusted according to the connection of the first battery holder  600 , the second battery holder  700 , and the external battery holder  930 . For example, when the first battery holder  600  and the second battery holder  700  are in parallel, the voltage output from the first battery holder  600  and the second battery holder  700  may be smaller than the series connection. When the voltage is small, even if electric power is applied to the latch bolt operating unit  520 , the magnitude of the voltage is weak and the door lock drive is hindered. In this case, the target voltage regulation circuit unit  550  boosts the voltage to smoothly drive the emergency power supply for digital door lock  100 . Further, the target voltage regulation circuit unit  550  steps down the voltage to prevent unnecessary waste of electric power. After that, the target voltage value transmitted to the latch bolt operating unit  520  via the target voltage adjusting circuit unit  550  is adjusted to 3 volts or 6 volts (S 36 - 3 ). Power is transmitted to the latch bolt operating unit  520  at a predetermined voltage (S 36 - 4 ), and the latch bolt  80  is moved to the inside of the digital door lock emergency power supply device  100  by driving the latch bolt operating portion  520  (S 36 - 5 ). The latch bolt operating unit  520  operates after it is determined that the password information input by the internal circuit unit  850  corresponds to the preset password information. The driving procedure of the motor drive module  500  according to  FIG. 36  can be applied to all the driving of the digital door lock emergency power supply device  100  according to the first to sixth embodiments of the present invention. The drive order of the motor drive module  500  according to  FIG. 36  is not limited to a specific order. That is, it can occur at the same time regardless of time. 
       FIG. 37  shows a driving procedure of a password input unit and an internal circuit unit, which are components of the emergency power supply for digital door lock of the present invention. 
     According to  FIG. 37 , the password information is input by the password input unit  800  (S 37 - 1 ), and the password input by the password input unit  800  is collated with the preset password (S 37 - 2 ). The internal circuit unit  850  determines whether or not the preset password and the input password match (S 37 - 3 ). When it is determined that the password set by the internal circuit unit  850  and the entered password match, the power to the motor drive module  500  is adjusted (S 37 - 4 ). When it is determined by the internal circuit unit  850  that the preset password and the input password information do not match, the power to the motor drive module  500  is restricted (S 37 - 5 ). After all the drive steps described above, it is determined whether the emergency power supply for digital door lock  100  opens or closes. Then, it is determined whether or not the door on which the emergency power supply for digital door lock  100  is installed is open. 
     The driving procedure of the password input unit  800  and the internal circuit unit  850  according to  FIG. 37  can be applied to the driving process of the digital door lock emergency power supply device  100  according to the first to sixth embodiments of the present invention. 
     The present invention has been described above with reference to the first to sixth embodiments. However, a skilled person skilled in the art can make various modifications from the invention described in the claims.