Patent Publication Number: US-2021172212-A1

Title: Door Locking Structure

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to Korean Patent Application No. 10-2019-0163264, filed on Dec. 10, 2019, which application is hereby incorporated herein by reference. 
     TECHNICAL FIELD 
     The present disclosure relates to a locking structure for doors. 
     BACKGROUND 
     In general, a door having a swinging structure which is rotated to be opened in an outward direction is mounted as a vehicle door. This door having the swinging structure, after a driver or a passenger unlocks the door through a handle installed on the door when the driver or the passenger gets into or out of the vehicle, allows the driver or the passenger to rotate the door in an outward direction so as to form a space between the door and a vehicle body and then to get into or out of the vehicle through the space. 
     Further, a door having a sliding structure which is slid in forward and backward directions to be opened and closed is applied to a vehicle, such as a van or a concept car. 
     The above door having the sliding structure, after a driver or a passenger unlocks the door through a handle installed on the door when the driver or the passenger gets into or out of the vehicle, allows the driver or the passenger to slide the door in the forward and backward directions so as to form a space in the side surface of a vehicle body and then to get into or out of the vehicle through the space. 
     Recently, together with development of autonomous vehicles, standards for drivers&#39; seats for driving vehicles have been relaxed, and various methods for getting into and out of vehicles have been researched.  
     Therefore, doors which are bidirectionally opened about a roof of a vehicle so that a driver or a passenger may easily access the interior of the vehicle are required, and thus, an opening structure of two doors facing each other is required. 
     Further, as this two door opening structure is provided, it is essentially required to change locking structures located on the inner surfaces of the doors. 
     Korean Patent Application No. 10-2011-0097657 discloses subject matter that is related to subject matter discussed herein. 
     SUMMARY 
     The present disclosure relates to a locking structure for doors. Particular embodiments relate to a door locking structure which is configured to unlock a door of a vehicle including a multi-locking unit in response to input through an input unit located on the door and simultaneously to rotate and open the door by a driving force applied by a driver located at the upper end of the door. 
     Embodiments of the present invention have been made in an effort to solve problems associated with the prior art and provide a door locking structure which may perform double locking. 
     Another embodiment of the present invention provides a door locking structure which may simultaneously perform unlocking of a locking unit configured to perform multi-locking through one input unit and application of driving force of a driver. 
     One embodiment of the present invention provides a door locking structure including at least one door located at both sides of a vehicle, at least one locking unit provided at the at least one door, an input unit configured to apply unlocking input to the at least one locking unit, and a controller configured to receive the input through the input unit and to unlock the at least one locking unit, wherein the controller integrally unlocks the at least one locking unit in response to the input through the input unit. 
     In a preferred embodiment, the at least one door may include an upper door configured to be rotated to be opened upwards in a height direction about an upper end of a roof, and a lower door configured to be rotated to be opened downward in the height direction about a vehicle body. 
     In another preferred embodiment, the at least one locking unit may include at least one auxiliary locker located on the upper door, and a main locker located at one end of the upper door. 
     In still another preferred embodiment, if unlocking input for the upper door is applied through the input unit, the controller may first unlock the at least one auxiliary locker and then unlock the main locker. 
     Another embodiment of the present invention provides a door locking structure including at least one upper door located at both sides of a vehicle, at least one auxiliary locker located on the at least one upper door, and a main locker located on the at least one upper door, an input unit configured to apply unlocking input to the at least one auxiliary locker and the main locker, and a controller configured to receive the input through the input unit and to unlock the main locker, wherein the at least one auxiliary locker is unlocked through mechanical driving in response to the input through the input unit, and the controller integrally unlocks the main locker in response to the input through the input unit. 
     In a preferred embodiment, if unlocking input for the at least one upper door is applied through the input unit, the at least one auxiliary locker may first be unlocked and the main locker may then be unlocked. 
     In another preferred embodiment, the input unit may include a housing located on the at least one upper door, a handle configured such that at least a portion of the handle is located inside the housing so as to apply user input to the handle, a wiring configured to perform electrical connection so as to unlock the main locker in response to the input through the handle, and an auxiliary locking cable configured such that one end thereof is located at the handle and the auxiliary locking cable is coupled to the at least one auxiliary locker. 
     In still another preferred embodiment, the door locking structure may further include a driver configured to apply driving force so as to perform input through the handle, if wireless user input is applied to the controller. 
     In yet another preferred embodiment, the controller may operate the driver to unlock the at least one auxiliary locker, and apply an electrical signal to unlock the main locker. 
     In still yet another preferred embodiment, the door locking structure may further include a driver configured to perform input through the handle, and a wheel gear unit located on the handle at a position corresponding to the driver, and the handle may be inserted into or rotated inside the housing according to driving of the driver. 
     In a further preferred embodiment, the door locking structure may further include an elastic member provided at a position opposite to one end of the handle inside the housing so as to restore the inserted handle to an original position thereof. 
     In another further preferred embodiment, the auxiliary locking cable may be coupled to a pawl of a latch of the at least one auxiliary locker, and the auxiliary locking cable may apply tension to the pawl in response to the input through the handle. 
     In still another further preferred embodiment, the pawl, to which the tension is applied, may be configured to release locking between a catch interlocked with the pawl and a striker.  
     In yet another further preferred embodiment, a brush unit located on the handle may contact the wiring in response to the input through the handle, and thus be electrically connected to the wiring. 
     Other aspects and preferred embodiments of the invention are discussed herein. 
     The above and other features of the invention are discussed herein. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other features of the present invention will now be described in detail with reference to certain exemplary embodiments thereof illustrated in the accompanying drawings which are given hereinbelow by way of illustration only, and thus are not limitative of the present invention, and wherein: 
         FIG. 1  is a longitudinal-sectional view of a vehicle having bidirectionally opened doors including a door locking structure according to one embodiment of the present invention; 
         FIG. 2  is a perspective view illustrating the inner configuration of a door including the door locking structure according to one embodiment of the present invention; 
         FIG. 3  is a schematic view illustrating the configuration of the door locking structure according to one embodiment of the present invention; 
         FIG. 4  is a schematic view illustrating the configuration of an input unit of a door locking structure according to another embodiment of the present invention; 
         FIG. 5  is a cross-sectional view illustrating coupling relations between a driver and a handle according to one embodiment of the present invention; 
         FIG. 6  is a cross-sectional view of an input unit of a door locking structure according to yet another embodiment of the present invention, taken along line b-b of  FIG. 4 ;  
         FIG. 7  is a cross-sectional view of an input unit of a door locking structure according to yet another embodiment of the present invention, taken along line a-a of  FIG. 4 ; and 
         FIG. 8  is a perspective view illustrating the configuration of a latch of the door locking structure according to embodiments of the present invention. 
     
    
    
     It should be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various preferred features illustrative of the basic principles of the invention. The specific design features of embodiments of the present invention as disclosed herein, including, for example, specific dimensions, orientations, locations, and shapes will be determined in part by the particular intended application and use environment. 
     In the figures, reference numbers refer to the same or equivalent parts of embodiments of the present invention throughout the several figures of the drawing. 
     DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS 
     Hereinafter reference will be made in detail to various embodiments of the present invention, examples of which are illustrated in the accompanying drawings and described below. While the invention will be described in conjunction with exemplary embodiments, it will be understood that the present description is not intended to limit the invention to the exemplary embodiments. On the contrary, the invention is intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments within the spirit and scope of the invention as defined by the appended claims. 
     In the following description of the embodiments, terms, such as “. . . part”, “. . . unit”, “. . . gear”, etc., mean units for processing at least one function or operation, and they may be implemented by hardware or a combination of hardware.  
     Also, in the following description of the embodiments, terms, such as “first”, “second”, etc., are used only to distinguish one element from other elements, and do not limit the sequence of the elements. 
     In addition, in the following description of the embodiments, elements relating to connection between a first door and a second door having the same operating relations and a drive unit may be described while omitting the terms “first” and “second”. 
     Further, in the following description of the embodiments, doors conceptually include a first door and a second door. 
     In addition, in the following description of the embodiments, locking units conceptually include a first locking unit and a second locking unit. 
     In the following description of the embodiments, the terms “first” and “second” have concepts relative to each other in consideration of symmetry of a door, and mean position relations which are symmetrical to each other in the width or length direction of a vehicle. 
     In addition, in the following description of the embodiments, doors may include various types of doors, such as an integral door, a divisible door, etc., and in the embodiments of the present invention, a vertically divisible door, i.e., a type of door which is divided into an upper door and a lower door, will be described. 
     Further, the first door and the second door are configured to be symmetrical to each other, and hereinafter a door locking structure will be described based on one upper door. 
     The present invention relates to a vehicle including a door locking structure, and particular embodiments relate to a bidirectional door opening module  100 . In embodiments of the present invention, a first upper door  110  may be configured such that one end of the first upper door  110  close to a first position of the vehicle is rotated to be opened upwards in the height direction about the other end of the first upper door  110  adjacent to a roof  600 , and a first  lower door  111  may be configured to be located adjacent to the opened end of the first upper door  110 . 
     A second upper door  120  may be configured such that one end of the second upper door  120  close to a second position of the vehicle is rotated to be opened in the height direction about the other end of the second upper door  120  adjacent to the roof  600 , and a second lower door  121  may be configured to be located adjacent to the opened end of the second upper door  120 . 
     The first upper door  110 , the first lower door  111 , the second upper door  120  and the second lower door  121  may include locking units  130  and  140 , respectively. Further, the first upper door  110  and the second upper door  120  are configured such that, when the locking units  130  and  140  are unlocked in response to a driver&#39;s request, driving force of a drive unit  150  is selectively applied to the first upper door  110  and the second upper door  120 , in which the locking units  130  and  140  are unlocked, so as to simultaneously or individually open the first upper door  110  and the second upper door  120 . 
     More particularly, the drive unit  150  may be configured to apply driving force so as to open the first upper door  110  and the second upper door  120 , and thus the drive unit  150  applies driving force to the first upper door  110  or the second upper door  120 , in which the locking unit  130  or  140  is unlocked. 
     In one embodiment of the present invention, a controller  300  is configured to determine whether or not an unlocking request for the locking units  130  and  140  is applied according to application of input through an input unit  200 , and more particularly, the controller  300 , such as a smart junction box (SJB), may determine input through the input unit  200  depending on signal input or output, and output unlocking signals of the locking units  130  and  140 .  
       FIG. 1  is a longitudinal-sectional view of an opening structure for the doors of the vehicle which are opened in first and second directions according to one embodiment of the present invention. 
     As shown in this figure, the drive unit  150  is located on the roof  600  of the vehicle, and one end of the first upper door  110  is rotated to be opened about the other end of the first upper door  110  adjacent to the drive unit  150 . Further, one end of the second upper door  120  is rotated to be opened about the other end of the second upper door  120  adjacent to the rear end of the drive unit  150 . 
     Further, the first lower door  111  which is rotated to be opened in the direction opposite to the rotating direction of the first upper door  110  may be further provided on the lower surface of the opened end of the first upper door  110 , and the second lower door  121  which is rotated to be opened in the direction opposite to the rotating direction of the second upper door  120  may be further provided on the lower surface of the opened end of the second upper door  120 . 
     The drive unit  150  is configured to be located between the first upper door  110  and the second upper door  120  on the roof  600  of the vehicle. More particularly, both ends of the drive unit  150  are coupled to a first hinge unit located on the first upper door  110  and a second hinge unit located on the second upper door  120 , and the drive unit  150  transmits opening force applied by a driver to the first hinge unit and the second hinge unit, respectively. 
     The drive unit  150  may include the driver configured to apply opening force to the first upper door  110  and the second upper door  120 , and a differential gear configured to transmit driving force applied by the driver to a spindle unit coupled to the first upper door  110  and the second upper door  120 . The differential gear is configured to transmit the driving force applied by the driver to the spindle unit.  
     Therefore, the differential gear of the drive unit  150  transmits driving force to the first door  110  or the second door  120 , which is unlocked, thereby opening the first door  110  or the second door  120 , which is unlocked. 
     More particularly, when user unlocking input is applied to a corresponding one of input units  200  respectively located on the first upper door  110  and the second upper door  120 , the drive unit  150  is driven so as to correspond to the first upper door  110  or the second upper door  120 , and thus, the first door  110  or the second door  120 , which is unlocked, is opened. 
     In addition, the spindle unit is configured to function as a damper of the hinge unit while the opened upper door  110  or  120  is being closed, thereby providing driving force for opening the doors  110  and  120  and preventing the doors  110  and  120  from rapidly falling while being closed. 
     The locking units  130  and  140  include a first locking unit  130  configured to unlock the first upper door  110  and a second locking unit  140  configured to unlock the second upper door  120 , a first spindle is driven depending on unlocking input of the first locking unit  130 , and a second spindle is driven depending on unlocking input of the second locking unit  140 . 
     More particularly, the controller  300  operates the driver of the drive unit  150  in response to unlocking of the first locking unit  130  or the second locking unit  140 , and thus performs control so as to open the first upper door  110  or the second upper door  120 , which is unlocked. 
     The first locking unit  130  may include a first main locker  132  and first auxiliary lockers  131 , the second locking unit  140  may include a second main locker  142  and second auxiliary lockers  141 , and the spindle unit may be driven corresponding to unlocking input of the main locker  132  or  142  and the auxiliary lockers  131  or  141  of the first locking unit  130  or the second locking unit  140 .  
     More particularly, in one embodiment of the present invention, unlocking input of the first locking unit  130  or the second locking unit  140  is applied through the input unit  200 , and the drive unit  150  is operated corresponding to the applied unlocking input. The first auxiliary lockers  131  and the first main locker  132  which are located on the first upper door  110  are sequentially unlocked in response to unlocking input through a first input unit  200 , and the first spindle is operated to rotate and open the first upper door  110 . 
     Further, the second auxiliary lockers  141  and the second main locker  142  which are located on the second upper door  120  are sequentially unlocked in response to unlocking input through a second input unit  200 , and the second spindle is operated to rotate and open the second upper door  120 . 
       FIG. 2  is a perspective view illustrating the first locking unit  130  and the first input unit  200  located on the first door according to one embodiment of the present invention. 
     As shown in this figure, the first upper door  110  includes the first locking unit  130  to perform locking of the first upper door  110 . The first locking unit  130  includes the first auxiliary lockers  131  located at both sides of the first upper door  110 , and the first main locker  132  located at one end of the first upper door  110  which is farthest away from the roof  600 . 
     The first input unit  200  is located at the middle portion of the inner surface of the first upper door  110 , and may be located at a position considering user convenience. 
     The first input unit  200  is configured to integrally unlock the first locking unit  130  located on the first upper door  110 . More particularly, if a user request is applied through the first input unit  200 , the controller  300  outputs an electrical signal so as to sequentially or integrally unlock the first locking unit  130 . 
     In another embodiment of the present invention, according to application of a user request through the input unit  200 , the first locking unit  130  may be unlocked by mechanical input through the input unit  200  simultaneously with output of an electrical signal from the controller  300 . 
     More particularly, the first auxiliary lockers  131  are mechanically driven to be unlocked in response to input through the input unit  200 , and the same input requests that the controller  300  output an electrical signal so as to unlock the first main locker  132 . 
     Each of the first auxiliary lockers  131  may include a latch  400  configured to be coupled to a striker  510  located on a vehicle body  500 , and the first main locker  132  may include a latch unit (not shown) configured to be fixed to a striker located on the vehicle body  500 . 
     In one embodiment of the present invention, the latches  400  and the latch unit may be configured such that the controller  300  applies driving force to the latches  400  and the latch unit so as to perform unlocking corresponding to user input through the input unit  200 . 
     Further, in another embodiment of the present invention, each of the latches  400  may be configured such that the latch  400  is coupled to the input unit  200  by an auxiliary locking cable  250  and thus the auxiliary lockers  131  are unlocked in response to mechanical input through the input unit  200 , and the latch unit may be configured such that the controller  300  unlocks the main locker  132  through an electrical signal in response to the same input through the input unit  200 . 
     The controller  300  may sequentially or integrally unlock the first auxiliary lockers  131  and the first main locker  132  in response to user input through the input unit  200 , and apply driving force to the first upper door  110 , which is unlocked, through the drive unit  150 . 
     In summary, the first auxiliary lockers  131  are configured to be unlocked by mechanical or electrical driving force in response to user input through the input unit  200 , and the first main locker  132  is configured to be unlocked by an electrical signal output from the controller  300 . Further, one end of the first upper door  110 , which is unlocked, close to the first position of the vehicle is rotated to be opened by driving the drive unit  150  in response to output from the controller  300 . 
     Further, the second door includes substantially the same elements as those of the first door shown in  FIG. 2 , and thus has the same driving relations for locking and unlocking the second upper door  120 . 
       FIG. 3  is a schematic view illustrating coupling relations between the elements of the locking structure of the first door in which the first main locker  132  and the first auxiliary lockers  131  are unlocked through an electronic signal. 
     As shown in this figure, the controller  300  receives a user input signal through the input unit  200 , and unlocks the first auxiliary lockers  131  and the first main locker  132  depending on the received input signal. 
     Further, the controller  300  outputs a signal so as to apply driving force of the drive unit  150  to the first upper door  110 , when the first auxiliary lockers  131  and the first main locker  132  are unlocked. 
     The drive unit  150  includes the spindles configured to extend in the length direction of the vehicle, and the first and second spindles individually or simultaneously extend depending on the signal output from the controller  300  and thus open the first upper door  110  which is unlocked. 
     The input unit  200  may be located on the inner surface of the first upper door  110 , and include a wireless input unit configured to apply an input signal through long distance communication with the input unit. 
     More particularly, an unlocking signal of the vehicle may be applied to the input unit  200  through wireless communication with a key of the vehicle or an application through a user mobile terminal, and an unlocking request may be applied to the input unit  200  through manual input using a handle  220  located on the inner surface of the vehicle. 
       FIG. 4  is a schematic view illustrating elements of an input unit  200  which may unlock the first auxiliary lockers  131  through manual input, according to another embodiment of the present invention. 
     If input through the input unit  200  is applied, the first auxiliary lockers  131  and the first main locker  132  are sequentially or integrally unlocked, and the input unit  200  according to this embodiment of the present invention is configured to unlock the first auxiliary lockers  131  through mechanical driving and to unlock the first main locker  132  through output of an electrical signal. 
     The input unit  200  may include a housing  210  which is indented into the first upper door  110 , and the handle  220  which is inserted into the housing  210  so as to receive an unlocking request from a user. 
     The housing  210  according to embodiments of the present invention has a cylindrical shape and at least a portion of the handle  220  is located inside the housing  210 . Further, the handle  220  may be configured such that a remaining portion of the handle  220  inserted into the housing  210  is additionally inserted into the housing  210  in response to user input in the length direction of the housing  210 . 
     As yet another input type according to embodiments of the present invention, the handle  220  is configured such that a portion of the handle  220  inserted into the housing  210  is integrally rotated in response to rotary input through the handle  220  and thus applies mechanical driving force to the first auxiliary lockers  131 . 
     The handle  220  located inside the housing  210  includes the auxiliary locking cable  250  which is coupled to the first auxiliary lockers  131 . Further, the handle  220  includes a brush  unit  230  which is electrically connected to a wiring  240  located inside the housing  210  so as to cause the controller  300  to output an electrical signal for unlocking the first main locker  132 . 
     The auxiliary locking cable  250  is configured to move integrally with the handle  220  inside the housing  210  in response to lengthwise input or rotary input through the handle  220 , and thus applies tension to the latches  400  coupled to the ends of the auxiliary locking cable  250 . 
     The wiring  240  may be configured to have a designated gap with the brush unit  230  in the height direction of the housing  210  in response to push input, and if the handle  220  is additionally inserted into the housing  210 , the brush unit  230  and the wiring  240  may be electrically connected, thus outputting an unlocking signal for the first main locker  132 . 
     On the other hand, the brush unit  230  may be configured to be located at a height corresponding to the height of the wiring  240  in response to rotary input through the handle  220  and to be spaced apart from the wiring  240  by a designated angle based on the central axis of the housing  210 , and the brush unit  230  and the wiring  240  may be electrically connected depending on a rotation angle of the handle  220 . 
     More preferably, the brush unit  230  may be located at each or both of positions corresponding to push input and rotary input through the handle  220 , and thus, generate electrical output for unlocking the first main locker  132  depending on a type of input according to user convenience. 
     The input unit  200  may include a drive unit  270  provided at one side of the housing  210 , and if a user applies unlocking input from the outside of the vehicle, the drive unit  270  applies driving force so as to additionally insert the handle  220  into the housing  210  or to rotate the handle  220  inside the housing  210 . 
     In one embodiment of the present invention, the drive unit  270  is configured to be coupled to a wheel gear unit  272  located on the handle  220 , and a worm gear  271 , to which the driving force of the drive unit  270  is applied, and the wheel gear unit  272  are interlocked with each other. Therefore, the driving force from the worm gear  271  is applied to the wheel gear unit  272  and thus the wheel gear unit  272  is rotated integrally with the handle  220 . 
     In another embodiment of the present invention, the handle  220  may be inserted into the housing  210  by rotation of the worm gear  271  so that the brush unit  230  contacts the wiring  240  and simultaneously a designated tension is applied to the auxiliary locking cable  250 . 
     In summary, the drive unit  270  located on one side surface of the housing  210  is configured such that the handle  220  is inserted into or rotated inside the housing  210  depending on coupling relations between the drive unit  270  and the wheel gear unit  272  located on the handle  220 , and applies tension to the auxiliary locking cable  250  and allows the brush unit  230  to contact the wiring  240  so as to unlock the first main locker  132  and the first auxiliary lockers  131 . 
     Thereby, if the door of the vehicle is unlocked from the outside of the vehicle, the first auxiliary lockers  131  are unlocked through mechanical driving force and simultaneously or sequentially the first main locker  132  is unlocked through the controller  300 . 
     The handle  220  of the input unit  200  is configured to be inserted into or rotated inside the housing  210  so as to unlock the locking unit, and in order to restore the handle  220  to an original position thereof after insertion into the housing  210 , the input unit  200  further includes an elastic member  260  provided at the inner end of the housing  210 . 
     The elastic member  260  may be configured to be compressed in response to push input of the handle  220  so as to apply tension to the handle  220 , and be configured to restore  the handle  220  to the initial position of the handle  220  using torque caused by rotation of the handle  220 . 
       FIG. 5  illustrates connection relations between the worm gear  271  of the drive unit  270  and the wheel gear unit  272  according to one embodiment of the present invention. 
     The drive unit  270  is located outside the housing  210 , and is coupled to the wheel gear unit  272  configured to surround the handle  220 . More particularly, the worm gear  271  located at one end of the drive unit  270  is configured to selectively contact the wheel gear unit  272 . 
     Therefore, if user unlocking input is applied from the inside of the vehicle, the drive unit  270  may be converted to a freewheel mode so as to prevent generation of failure due to coupling between the drive unit  270  and the wheel gear unit  272 , and thus, a state in which the handle  220  and the wheel gear unit  272  formed along the outside of the handle  220  are independently drivable may be maintained. 
     That is, if a user applies unlocking input for the first upper door  110  to the input unit  200  from the outside of the vehicle, the wheel gear unit  272  may be fixed to the handle  220 , and the wheel gear unit  272  and the handle  220  may be simultaneously driven by the drive unit  270 . 
     On the other hand, if the user applies unlocking input for the first upper door  110  to the input unit  200  from the inside of the vehicle, coupling between the wheel gear unit  272  and the handle  220  may be released, and the handle  220  alone may be independently driven. 
     In one embodiment of the present invention, the wheel gear unit  272  and the handle  220  may be coupled so as to be rotated integrally by inserting one or more protrusions  273  formed at the outer surface of the handle  220  into recesses  274  formed in the wheel gear unit  272 , and when the protrusions  273  are located in regions other than the recesses  274 , the handle  220  may be driven independently of the wheel gear unit  272 . 
     Therefore, if an unlocking request for the first upper door  110  is input through the wireless input unit  200 , the wheel gear unit  272  and the drive unit  270  are coupled to each other so as to induce physical movement of the handle  220 , and if the user applies physical input to the input unit  200  from the inside of the vehicle, the handle  220  may be driven independently of the wheel gear unit  272 , thereby being capable of preventing movement of the handle  220  from being restricted by the drive unit  270 . 
       FIG. 6  illustrates coupling relations between the elements for electrical connection between the brush unit  230  located on the handle  220  and the wiring  240  if the handle  220  is rotated in response to rotary input, according to another embodiment of the present invention. 
       FIG. 6  is a cross-sectional view taken along line b-b of  FIG. 4 , illustrating coupling relations between the wiring  240  and the brush unit  230 . 
     The wiring  240  is provided at one side surface of the housing  210  so as to be electrically connected to the controller  300  outside the housing  210 . The wiring  240  is configured so as to maintain an open state, and when the wiring  240  contacts the brush unit  230  located on one side surface of the handle  220 , the brush unit  230  is electrically connected to the wiring  240 . 
     When the brush unit  230  is electrically connected to the wiring  240 , an electrical signal is applied to the controller  300 , and the controller  300  unlocks the first main locker  132  based on the signal applied through the wiring  240 . 
     The brush unit  230  is located at a portion of the side surface of the handle  220  so as to form a designated angle with the wiring  240 , and contacts the wiring  240  in response to rotary input through the handle  220 .  
     More particularly, only when rotary input is applied though the handle  220  so as to couple the brush unit  230  to both open ends of the wiring  240 , an electrical signal is applied to the controller  300  through the wiring  240 . 
       FIG. 7  is a cross-sectional view of elements of the handle  220  to which auxiliary locking cables  250  are coupled, according to yet another embodiment of the present invention. 
       FIG. 7  is a cross-sectional view taken along line a-a of  FIG. 4 , illustrating the auxiliary locking cables  250 , each of which has one end connected to each of the first auxiliary lockers  131  located at both sides of the first upper door  110 , and the other end connected to the handle  220 . 
     Here, one end of each of the auxiliary locking cables  250  is fixed to the handle  220 , and the other end of each of the auxiliary locking cables  250  is coupled to the latch  400  of each of the first auxiliary lockers  131 . More particularly, the other end of the auxiliary locking cable  250  is coupled to a pawl  410  of the latch  400  so as to apply tension to the pawl  410  through the auxiliary locking cable  250 . 
     If rotary input is applied to the handle  220 , the auxiliary locking cables  250  fixed to the handle  220  by fixing pins move along the handle  220  in the rotating direction of the handle  220 . Therefore, tension is applied to the auxiliary locking cables  250  in the direction toward the input unit  200 . 
     Thus, the tension of the auxiliary locking cables  250  is applied to the pawls  410  of the first auxiliary lockers  131 , and locking of catches  420  of the latches  400  with the strikers  510  located on the vehicle body  500  is released. 
     Further, in yet another embodiment of the present invention, if the handle  220  is inserted into the housing  210  in the height direction of the housing  210  or is pulled in the length direction of the housing  210 , the auxiliary locking cables  250  fixed to the fixing pins are moved integrally with the handle  220 , and thus, a designated tension is applied to the first auxiliary lockers  131 . 
     In summary, the auxiliary locking cables  250  are configured to apply mechanical driving force to the first auxiliary lockers  131  in response to various input types, and may thus unlock the first auxiliary lockers  131 . 
       FIG. 8  is a perspective view of the latch  400  located on the first auxiliary locker  131 , and the latch  400  includes the pawl  410  coupled to one end of the first auxiliary locker  131 , and the catch  420  located adjacent to the pawl  410  so as to be fixed to the striker  510 . 
     A protrusion located at one end of the pawl  410  is configured to face one end of the catch  420  so as to maintain a fixed state between the catch  420  and the striker  510 . 
     The catch  420  includes a return spring  430 , to which a designated force is applied in a path direction in which the striker  510  is inserted into the catch  420 , and if the catch  420  is fixed by the pawl  410  and then the pawl  410  is separated from the catch  420  by tension of the auxiliary locking cable  250 , the catch  420  is rotated in a direction to release locking of the catch  420  with the striker  510  located on the vehicle body  500 . 
     The pawl  410  is configured such that one end of the pawl  410  is rotated about a stationary shaft located at one end of the pawl  410  by the auxiliary locking cable  250 , and an elastic spring is located at the stationary shaft so as to restore the pawl  410  to an original position thereof when the tension applied to the pawl  410  by the auxiliary locking cable  250  is released. 
     As such, an embodiment of the present invention provides the door locking structure which is configured such that, if an unlocking request (input) is applied through the input unit  200  located on the first upper door  110 , electrical connection is applied to the first main locker   132  and mechanical driving force or electrical connection is applied to the first auxiliary lockers  131  so as to unlock the first main locker  132  and the first auxiliary lockers  131 . 
     As is apparent from the above description, embodiments of the present invention may provide the following effects through the above-described configuration and connection and usage relations. 
     A door locking structure according to embodiments of the present invention may simultaneously unlock a main locker and auxiliary lockers in response to one input by a user, thereby improving user convenience. 
     Further, the door locking structure according to embodiments of the present invention may include an input unit configured to simultaneously perform mechanical driving input and electrical driving input, thereby improving user convenience. 
     The invention has been described in detail with reference to preferred embodiments thereof. However, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents. That is, while the invention has been explained in relation to the embodiments thereof, it is to be understood that various modifications thereof will become apparent to those skilled in the art upon reading the specification. These embodiments have been described to explain the best mode to implement the technical scope of the invention, and various modifications required for the specific application and purpose of the present invention are possible. 
     Although, in the above description, a first door which may be located at a front region and a second door which may be located at a rear region have been described as bidirectional doors, the first door and the second door may include all doors which are located at symmetrical positions, i.e., one door located on the side surface of a vehicle and another door located on the side surface at a position opposite the first door, and the positions of the first door and the second door are not limited. Therefore, the above detailed description of embodiments of the present invention is not intended to limit the invention. Further, it must be interpreted that the accompanying claims include other modes.