Patent Publication Number: US-2020287396-A1

Title: Protective casing for portable terminal with built-in auxiliary battery

Description:
TECHNICAL FIELD 
     The present invention relates to a protective casing for a portable terminal, and more particularly, to a protective casing for a portable terminal with a built-in auxiliary battery which is embedded in the protective casing to provide auxiliary power to the portable terminal and is wirelessly charged. 
     BACKGROUND ART 
     Recently, since mobile phones, which are portable terminals such as smartphones and tablet personal computers (PCs), are used while moving and use batteries serving as power sources unlike wired phones which are used at fixed positions to receive power, the batteries are very important for the mobile phones. 
     The batteries have a tendency to become thinner as the mobile phones are miniaturized, and in a case in which the battery is consumed through use of the mobile phone, the battery should be recharged. Since moving images are captured and various functions such as multimedia and Internet are additionally performed in addition to an increase in communication traffic amount, battery consumption is increased, and thus importance of charging is increasing. 
     Particularly, while the number of users of the smartphone referred to as a computer in hand due to various applications being useable is rapidly increasing lately, necessity of the charging increases further. 
     Accordingly, additional charging devices are provided in houses or offices to use an alternating current (AC) power of AC110/220 V or are provided in vehicles to use cigar jacks of the vehicles for direct current (DC) 12/24 V to charge mobile phones. 
     However, use of the above described charging method is limited to a place which is not the house or office and to which the AC power is not supplied, and when the vehicle is not traveling, there is cumbersomeness in starting the vehicle up for charging. 
     Accordingly, although an auxiliary battery is carried in addition to a mobile phone and is replaced when a currently installed battery is completely consumed in the mobile phone so that the mobile phone can be continuously used at any time and place, since such a battery should be carried, it is inconvenient to carry the battery, there is also worry of loss, and a case frequently occurs in which the battery is broken due to carelessness or an external impact while being carried Therefore, a protective casing for a mobile phone in which an auxiliary battery is accommodated is proposed, but the protective casing has a limit of providing a simple function to accommodate the auxiliary battery. 
     DISCLOSURE 
     Technical Problem 
     The present invention is directed to providing a protective casing for a portable terminal with a built-in auxiliary battery which is embedded in the protective casing and provided as an auxiliary power source for a portable terminal. 
     In addition, the present invention is also directed to providing a protective casing for a portable terminal with a built-in auxiliary battery in which the auxiliary battery is wirelessly charged to maximize user convenience. 
     Objectives of the present invention are not limited to the above objectives, and other objectives which are not mentioned above will be clearly understood to those skilled in the art from the following descriptions. 
     Technical Solution 
     One aspect of the present invention provides a protective casing for a portable terminal with a built-in auxiliary battery, the protective casing including a casing body which covers and protects a side surface and a rear surface of a portable terminal, a battery mounting part positioned on a rear surface of the casing body to support installation and separation of the auxiliary battery, a battery power supply part which supplies power charged in the auxiliary battery to the portable terminal when the auxiliary battery is installed in the battery mounting part, a battery wireless charging part which receives wirelessly transmitted power and charges the auxiliary battery, and an additional component mounting part positioned on the rear surface of the casing body to support mounting of the battery wireless charging part. 
     The protective casing for a portable terminal with a built-in auxiliary battery may further include an input part which receives a user control value. 
     In addition, the protective casing for a portable terminal with a built-in auxiliary battery may further include an output adjusting part which adjusts output power of the auxiliary battery according to the user control value. 
     In addition, the output adjusting part may determine a charging mode of the portable terminal according to the user control value, may convert the output power of the auxiliary battery to a first value and provide the first value to the portable terminal in a case of a general mode and may convert the output power of the auxiliary battery to a second value greater than the first value and provide the second value to the portable terminal in a case of a rapid mode. 
     The battery mounting part may include a battery mounting part body provided with an inner space for supporting installation of the auxiliary battery, and a cover which covers the inner space provided in the battery mounting part body to prevent separation of the auxiliary battery. 
     In addition, the battery mounting part may further include at least one elastic member which is fixed to at least one side wall of the inner space of the battery mounting part body and has a predetermined elastic force, and at least one pressing part which is fixed to one end of the elastic member and presses the auxiliary battery in one direction using the elastic force of the elastic member. 
     In addition, the protective casing for a portable terminal with a built-in auxiliary battery may further include a battery charging amount check device which is formed to have a sticker shape and of which colored light is changed according to an amount of charge of the auxiliary battery. 
     Advantageous Effects 
     In a protective casing for a portable terminal with a built-in auxiliary battery according to the present invention, since the auxiliary battery is embedded in the protective casing and provided as an auxiliary power source for a portable terminal and is wirelessly charged, user convenience is maximized. 
     In addition, a wider variety of kinds of the auxiliary battery can be installed to maximize utilization of the protective casing. 
     In addition, in a case in which the portable terminal is charged through the auxiliary battery, since a charging speed can be controlled according to requirements of the user, user satisfaction can be increased further. 
    
    
     
       DESCRIPTION OF DRAWINGS 
         FIGS. 1 and 2  are views for describing a protective casing for a portable terminal with a built-in auxiliary battery according to one embodiment of the present invention. 
         FIG. 3  is a view for describing a battery mounting part in detail according to one embodiment of the present invention. 
         FIG. 4  is a view for describing a battery power supply part in detail according to one embodiment of the present invention. 
         FIG. 5  is a view for describing a battery power supply part in detail according to another embodiment of the present invention. 
         FIG. 6  is a view for describing a protective casing for a portable terminal with a built-in auxiliary battery according to another embodiment of the present invention. 
         FIGS. 7 and 8  are views for describing a protective casing for a portable terminal with a built-in auxiliary battery according to still another embodiment of the present invention. 
     
    
    
     MODES OF THE INVENTION 
     Objectives and effects of the present invention and technical components for achieving the same will be clearly understood with reference to the following embodiments which will be described in detail and the accompanying drawings. When the embodiments of the invention are described, in a case in which it is determined that detailed descriptions of a known technology or components related to the present invention unnecessarily obscure the gist of the invention, the detailed descriptions thereof will be omitted. 
     In addition, some terms described below are defined by considering functions in the invention and meanings may vary depending on, for example, a user or operator&#39;s intentions or customs. 
     However, the present invention is not limited to the embodiments to be disclosed below and may be implemented in various different forms. The embodiments are provided in order to fully explain the present invention and fully explain the scope of the present invention for those skilled in the art, and the present invention is only defined by the appended claims. Therefore, the definition should be interpreted based on contents throughout this specification. 
       FIGS. 1 and 2  are views for describing a protective casing for a portable terminal with a built-in auxiliary battery according to one embodiment of the present invention. 
     Referring to  FIGS. 1 and 2 , a casing  100  according to the present invention includes a casing body  110 , a battery mounting part  120 , a battery power supply part  130 , a battery wireless charging part  140 , an additional component mounting part  150 , and the like. 
     The casing body  110  includes an inner space  111  which is formed to correspond to an entire shape of a portable terminal  10  and to cover side and rear surfaces of a smartphone and which accommodates and fixes the portable terminal  10 . In addition, as necessary, the casing body  110  may also further include a hole  112  corresponding to positions and sizes of a camera and a flash attached to a rear surface of the portable terminal  10 . 
     The battery mounting part  120  includes a battery mounting part body  122  provided with an inner space  121  positioned on a rear surface of the casing body  110  to support installation and separation of the auxiliary battery  20  and a cover  123  which covers the inner space  121  provided in the battery mounting part body  122  to prevent separation of the auxiliary battery  20  so as to support the installation or separation of the auxiliary battery  20 . 
     In this case, the battery mounting part body  122  and the cover  123  may be coupled through a slot method, a hinge method, or the like. In addition, the cover  123  may cover the inner space of the battery mounting part body  122  through various methods of covering an entirety or part of the inner space of the battery mounting part body  122 . 
     However, in a case in which the auxiliary battery  20  is installed and fixedly positioned in the inner space through an insertion method, since a kind of the auxiliary battery  20  capable of being installed is limited according to a shape of the inner space  121 , the battery mounting part  120  according to the present invention may further include a unit for diversifying a kind of an installable auxiliary battery. 
     For example, as illustrated in  FIG. 3 , the battery mounting part  120  according to the present invention may further include one or more elastic members  124  which are fixed to one or more of one side walls of the inner space  121  of the battery mounting part body  122  and have predetermined elastic forces, and one or more pressing parts  125  which are fixed to the other end of the elastic member  124  and press the auxiliary battery  20  in one directions using the elastic forces of the elastic members  124  so as to fix a position of the auxiliary battery  20  at one side of the inner space  121  regardless of a size and a shape of the auxiliary battery  20 . That is, a wider variety of kinds of the auxiliary battery  20  may be installed in the protective casing  100 . 
     In this case, positions and the number of the elastic members  124  may be variable but may be adjusted within a range in which electrical contacts are maintained between input and output terminals of the auxiliary battery  20  and a power terminal provided on the battery power supply part  130 . 
     As illustrated in  FIG. 4 , the battery power supply part  130  includes a power terminal  131  which is in electrical contact with the input and output terminals of the auxiliary battery  20 , a connector  132  coupled to a connector terminal of the portable terminal  10 , and a signal line  133  which electrically connects the power terminal  131  and the connector  132 , and power of the auxiliary battery  20  may be transmitted to the portable terminal  10  through the power terminal  131 , the connector  132 , and the signal line  133 . In this case, it may be more preferable that the signal line  133  is inserted into the casing body  110  so that the signal line  133  is invisible from the outside. 
     In addition, in a case in which a kind of the auxiliary battery installed in the battery mounting part  120  is diversified, since positions of the input and output terminals of the auxiliary battery are changed according to a kind of the auxiliary battery, a position of the power terminal  131  in electrical contact with the input and output terminals of the auxiliary battery  20  may be variable in the battery power supply part  130  according to the present invention. 
     That is, as illustrated in  FIG. 5 , a battery power supply part  130  according to the present invention may include a rail member  134 , in which first electrode strips  134   a  are formed to extend in a longitudinal direction and electrically connected to a signal line  133 , and electrode terminals  135   a  in electrical contact with the first electrode strips  134   a  and second electrode strips  135   b , which electrically connect a power terminal  131  formed on an upper surface of the battery power supply part  130  and the electrode terminals  135   a , and may further include a coupling unit  135  which is coupled to the rail member  134  and of which a position is adjusted on the rail member  134  in the longitudinal direction. 
     A battery wireless charging part  140  receives wirelessly transmitted power to convert the power to an electronic signal and transmits the electronic signal to input and output terminals of an auxiliary battery. That is, the auxiliary battery may be charged through a wireless power charging method. 
     An additional component mounting part  150  is positioned on a rear surface of a casing body  110  and supports mounting of the battery wireless charging part  140 . The additional component mounting part  150  may include an inner space which supports mounting of the battery wireless charging part  140  and a cap which is additionally provided to seal the inner space, but as necessary, the additional component mounting part  150  may also include an inner space and a cap which are integrated. 
     In addition, in a casing  100  according to the present invention, a charging speed of the portable terminal may also be arbitrarily adjusted by control of a user as necessary. 
     That is, as illustrated in  FIG. 6 , the casing  100  according to the present invention may include a switch, a button, and the like and may further include an input part  160  which receives a user control value through the switch, the button, and the like and an output adjusting part  170  which determines a charging mode of the portable terminal according to the user control value and adjusts an output level of an electronic signal according to the charging mode of the portable terminal so as to arbitrarily adjust the charging speed of the portable terminal. 
     For example, the output adjusting part  170  according to the present invention has two terminal charging modes including a general mode and a rapid mode, and in a case in which the user selects the general mode through the input part  160 , the output adjusting part  170  converts a battery output to a first value (for example, 5 V/1 A) and provides the first value to the portable terminal  10 . 
     However, in a case in which the user selects the rapid mode through the input part  160 , the output adjusting part  170  converts an battery output to a second value (for example, 5 V/2.4 A) greater than the first value and provides the second value to the portable terminal  10 . In this case, the first value and the second value may be arbitrarily adjusted within a range of a rated input of the portable terminal. 
     In addition, the output adjusting part  170  may be embedded in the additional component mounting part  150  with the battery wireless charging part  140 , and the input part  160  may be positioned on a rear surface of the casing body  110 , a cap of a battery mounting part  120 , or the like. 
       FIGS. 7 and 8  are views for describing a protective casing for a portable terminal with a built-in auxiliary battery according to still another embodiment of the present invention. 
     As illustrated in  FIG. 7 , the protective casing for a portable terminal according to the present invention may also further include a battery charging amount check device  180  which is a sticker type and in which colored light is changed according to an amount of charge of an auxiliary battery  20  in addition to the casing body  110 , the battery mounting part  120 , the battery power supply part  130 , the battery wireless charging part  140 , and the additional component mounting part  150  which are described above. 
     Particularly, the sticker type battery charging amount check device  180  according to the present invention may be formed to have a sticker shape to minimize a device forming cost and a volume thereof and may include a thin film  810  having a sticker shape, first and second electrode terminals  821  and  822  which are formed to protrude outward from one side end of a front surface of the thin film  810  and are in contact with input and output terminals of the battery  20 , first and second contact pads  831  and  832  which are positioned at the other side end of the front surface of the thin film  810  and come into contact with the body of a user, a metal conductor  840  positioned on the front surface of the thin film  810  to connect the first electrode terminal  821  and the first contact pad  831 , a heating and coloring element  850  which is positioned on the front surface of the thin film  810  to connect the second electrode terminal  822  and the second contact pad  832  and of which colored light is changed according to an amount of charge of the battery  20 , an adhesive member  860  supporting adhesion between the thin film  810  and the battery  20 , and an insulating film  870  attached to the front surface of the thin film  810  to expose the first and second electrode terminals  821  and  822 , the first and second contact pads  831  and  832 , and some portions of the heating and coloring element. 
     In addition, as illustrated in  FIG. 8 , the heating and coloring element  850  may include a plurality of heating conductors  851   a ,  852   a , and  853   a  which have different resistance values and generate heat corresponding to the resistance values thereof and an output current of the battery, and coloring type temperature-indicating paints  851   b ,  852   b , and  853   b  which have different coloring values and are applied on the heating conductors. In addition, as necessary, the heating and coloring element  850  may also further include metal conductors  854  which connect the first electrode terminal  821  and the plurality of heating conductors  851   a  and  852   a , and  853   a  and connect the plurality of heating conductors  851   a ,  852   a , and  853   a  and the first contact pad  831 . That is, when a production cost is considered, the heating conductors  851   a ,  852   a , and  853   a  of which costs are relatively high may be replaced by the metal conductors  854  of which costs are relatively low to reduce a manufacturing cost. 
     In addition, in some cases, the heating and coloring element  850  may be formed using one heating conductor in which a heating extent is changed according to an output current of the battery and a coloring type temperature-indicating paint which is applied on the heating conductor and of which colored light is changed according to the heating extent of the heating conductor. 
     The sticker type battery charging amount check device  180  formed as described above will operate as follows. 
     When the body of the user simultaneously comes into contact with the first and second contact pads  831  and  832 , a current path is formed through the first electrode terminal  821 , the metal conductor  840 , the first contact pad  831 , the body of the user, the second contact pad  832 , the heating and coloring element  850 , and the second electrode terminal  822 . 
     Then, an output current of the battery  20  flows through the sticker type battery charging amount check device, the first heating conductor  851   a  generates heat corresponding to a first resistance value (for example, 30Ω) and a battery output current  1   b , the second heating conductor  852   a  generates heat corresponding to a second resistance value (for example, 20Ω) and a battery output current  1   b , and the third heating conductor  853   a  generates heat corresponding to a third resistance value (15Ω) and a battery output current  1   b.    
     Then, the first to third coloring type temperature-indicating paints  851   b ,  852   b , and  853   b  react to heat generated by the first to third heating conductors  851   a ,  852   a , and  853   a  and start to perform coloring operations. 
     However, the coloring operations are performed only when the first to third coloring type temperature-indicating paints  851   b ,  852   b , and  853   b  generate heat having a predetermined temperature or more. Accordingly, in a case in which a current (for example, 1 A&lt;Ib≤1.5 A) within a first range flows, only the first coloring type temperature-indicating paint  851   b  applied on the first heating conductor  851   a  having a largest first resistance value reacts and emits green light. Meanwhile, in a case in which a current (for example, 1.5 A&lt;Ib≤1.7 A) within a second range having a value greater than a value of the first range flows, both of the first and second coloring type temperature-indicating paints  851   b  and  852   b  applied on the first and second heating conductors  851   a  and  852   a  react and emit green light and orange light. In addition, in a case in which a current (for example, 1.7 A&lt;Ib≤2 A) within a range having a value greater than a value of the second range flows, all of the first to third coloring type temperature-indicating paints  851   b ,  852   b , and  853   b  applied on the first to third heating conductors  851   a ,  852   a , and  853   a  react and emit green light, orange light, and red light. 
     As the result, the user may visually check an output current of the battery  20  through kinds and the number of pieces of color light emitted by the heating and coloring element  850  and may check even an amount of charge of the battery since the output current of the battery  20  is proportionally increased to the amount of charge of the battery. 
     The above description is only an example describing a technological scope of the present invention. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, the embodiments disclosed above and in the accompanying drawings should be considered in a descriptive sense only and not for limiting the technological scope. The technological scope of the present invention is not limited by the embodiments and the accompanying drawings. The scope of the present invention should be interpreted by the appended claims and encompass all equivalents falling within the scope of the appended claims.