Patent Publication Number: US-10330375-B2

Title: Refrigerator

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a National Stage application under 35 U.S.C. § 371 of International Application No. PCT/KR2016/007391, filed Jul. 7, 2016, which claims the benefit of Korean Application No. 10-2015-0100630, filed on Jul. 15, 2015. The disclosures of the prior applications are incorporated by reference in their entirety. 
     TECHNICAL FIELD 
     The present disclosure relates to a refrigerator having a power supply module that supplies a power to electronic elements provided on a shelf. 
     BACKGROUND ART 
     A refrigerator is an apparatus which maintains freshness of various foodstuffs at a low temperature, using cooling air generated by a refrigeration cycle including a compressor, a condenser, an expansion valve and an evaporator. 
     The refrigerator includes at least one of a storage unit (for instance, a shelf, a tray, a basket, and the like) to effectively use an internal storage space. For instance, the shelf and tray may be installed within a main body of the refrigerator, and the basket may be disposed at an inside of a door. 
     Meanwhile, the refrigerator may include a lighting installation to illuminate an inside of the refrigerator and a display device to display information. Recently, a research on a power supply structure has been made for a lighting of the shelf, for a user&#39;s convenience and in a viewpoint of esthetic appreciation. 
     However, in case of a drawer type shelf which is installed to be drawn into an inside of the refrigerator from outside, a general power supply structure which uses a cable has a difficulty in assembling. Further, a sealing of the power supply structure is a very important factor from the viewpoint of the humid environment inside the refrigerator. 
     DISCLOSURE 
     Technical Problem 
     Therefore, an aspect of the detailed description is to provide a refrigerator with a structure to improve a transfer of impact to a holder side terminal due to assembly dispersion or dimension dispersion when assembling a shelf. 
     Another aspect of the detailed description is to provide a refrigerator with a structure to limit the holder side terminal and the shelf side terminal to be exposed to moisture. 
     Still another aspect of the detailed description is to provide a refrigerator with a structure to prevent a movement failure of the holder side terminal by an eccentric pressure from being generated when inserting the shelf side terminal into one side of the holder side terminal. 
     Still another aspect of the detailed description is to provide a refrigerator with a structure to improve the problem in that an electric connection between the power supply and the holder side terminal is hindered since the natural resistance of an elastic member is high when applying a power through the elastic member. 
     Still another aspect of the detailed description is to provide a refrigerator with a structure to set an internal movement range of the holder side terminal by a pressure of the shelf side terminal. 
     Technical Solution 
     To achieve these and other advantages and in accordance with the purpose of the present disclosure, as embodied and broadly described herein, there is provided a holder terminal unit provided in a main body of the refrigerator; and a shelf terminal unit provided in a shelf installed in the main body, wherein the holder terminal unit may include a holder installed at an inner rear wall of the main body and having an opening which is opened toward a front side of the refrigerator; a holder side terminal provided to correspond to a shelf side terminal of the shelf terminal unit and configured to be movable in the forward and backward directions within the holder; and an elastic member provided between the holder and the holder side terminal and configured to elastically support the holder side terminal, and the holder side terminal is pressurized by the shelf side terminal which is inserted through the opening into the holder and moved backwardly, while maintaining an elastic contact with the shelf side terminal by the elastic member. 
     In one embodiment disclosed herein, the holder terminal unit may be provided at the inner rear wall of the main body so that the holder side terminal may be located in a front side, and the shelf side terminal may be provided at a rear side of the shelf which faces the rear wall so as to face the holder side terminal with each other. 
     In one embodiment disclosed herein, a pair of guide ribs may be extended in the front and rear directions at both inner sides of the holder, and the holder side terminal may be accommodated between the guide ribs so as to be guided in the front and rear directions. 
     In one embodiment disclosed herein, the holder terminal unit may be mounted to the holder so as to cover the opening, and may further include a cover having a cutout portion through which the shelf side terminal passes. 
     In one embodiment disclosed herein, the cutout portion may include a main cutout portion which is cutout vertically in a lengthwise direction of the cover, and a first sub-cutout portion and a second sub-cutout portion each provided at both ends of the main cutout portion and extended toward both sides of the main cutout portion. 
     In one embodiment disclosed herein, the cover may be formed of an elastically transformable material. 
     In one embodiment disclosed herein, the holder terminal unit may further include a bridge configured to elastically support both sides of a rear surface of the holder side terminal to compensate for an eccentric pressure generated by pressing one side of the holder side terminal. 
     In one embodiment disclosed herein, the bridge may be formed of a metallic material and configured to electrically connect the power supply to the holder side terminal. 
     In one embodiment disclosed herein, the bridge may include a support part extended from a rear surface of the holder side terminal in a lengthwise direction and configured to support both sides of the holder side terminal, and a connection part extended to cross the lengthwise direction and elastically supported by the holder, and electrically connected to the power supply unit. 
     In one embodiment disclosed herein, the connection part may be extended from a central portion of the support part. 
     In one embodiment disclosed herein, the support part may be formed to have a shape bent a plurality of times to support both ends of the holder side terminal without contacting a central portion of the holder side terminal. 
     In one embodiment disclosed herein, the elastic member may be disposed at a central portion of the support part. 
     In one embodiment disclosed herein, the shelf side terminal may include a first shelf side terminal and a second shelf side terminal in upper and lower directions thereof, respectively, and the holder side terminal may include a first holder side terminal corresponding to the first shelf side terminal and a second holder side terminal corresponding to the second shelf side holder. 
     In one embodiment disclosed herein, the holder may include an insulation jaw disposed between the first holder side terminal and the second holder side terminal for insulation therebetween. 
     In one embodiment disclosed herein, the shelf terminal unit may further include a shelf terminal housing, disposed at a rear side of the shelf, to which the first and second shelf side terminals are mounted, respectively, and the shelf terminal housing may be hooked by the insulation jaw when the shelf is inserted into the main body more than a predetermined depth. 
     In one embodiment disclosed herein, the bridge may include a first bridge corresponding to the first holder side terminal provided at an upper side, and a second bridge corresponding to the second holder side terminal provided at a lower side, and the connection part of the first bridge may be upwardly extended, and the connection part of the second bridge may be downwardly extended. 
     In one embodiment disclosed herein, the holder terminal unit may further include a bridge extended in a lengthwise direction on a rear surface of the holder side terminal and including a support part configured to support both sides of the holder side terminal, and a connection part extended to cross the lengthwise direction from the support part so as to be elastically supported by the holder and electrically connected to the power supply unit. The bridge may include a first bridge corresponding to the first holder side terminal provided at an upper side, and a second bridge corresponding to the second holder side terminal provided at a lower side, and the connection part of the first bridge may be upwardly extended, and the connection part of the second bridge may be downwardly extended. 
     In one embodiment disclosed herein, the elastic member may include a first spring and a second spring disposed at both sides of the holder side terminal, respectively. 
     In one embodiment disclosed herein, the holder terminal unit may further include a power supply terminal electrically connected to the power supply unit, and a connection member connected to the power supply terminal and configured to elastically support a rear surface of the holder side terminal, and formed of a metallic material to electrically connect the power supply terminal to the holder side terminal. 
     In one embodiment disclosed herein, the elastic member may be connected to one end of the connection member which elastically supports a rear surface of the holder side terminal and the power supply terminal, respectively. 
     Further, in one embodiment, there may be provided at the shelf a light source configured to emit a light by receiving a power when the shelf side terminal and the holder side terminal are electrically connected with each other, and a light guide member that guides a light emitted from the light source. 
     Advantageous Effects 
     According to the present disclosure, the holder side terminal is configured to be inwardly and outwardly movable, and an elastic member is provided at a rear surface of the holder side terminal. Such a configuration enables the holder side terminal to move inwardly in an elastically supported state, so that a shock that may be generated at the holder side terminal when assembling a shelf can be buffered. Further, since the holder side terminal is configured to be in contact with the shelf side terminal with pressure by the elastic member, the contact reliability can be enhanced. 
     Further, since a cover including a cutout portion through which the shelf side terminal may pass is mounted at the holder, inflow of moisture can be limited, thus protecting the holder side terminal and the shelf side terminal, thereby enhancing the contact reliability. 
     Additionally, a bridge is provided at a rear surface of the holder side terminal to elastically support both sides of the rear surface of the holder. According to this configuration, an eccentric pressure that may be generated by pressing one side of the holder side terminal can be compensated, so that a movement failure due to the eccentric pressure can be prevented. 
     The bridge for correcting the eccentricity of the holder side terminal may be used as a medium for an electric connection between the power supply unit and the holder side terminal. In this instance, the problem in that a disturbance in the electric connection between the power supply unit and the holder side terminal occurs since the natural resistance of the elastic member is high when supplying a power through the elastic member, can be improved. 
     Further, the shelf terminal housing of the shelf terminal unit is configured to be hooked by an insulation jaw when inserted into the holder at a predetermined depth. Thus, an insertion depth of the shelf terminal unit into the holder can be limited, and a damage of the holder terminal unit due to an excessive insertion of the shelf terminal unit can be prevented. 
     Meanwhile, a first spring and a second spring are disposed at both sides of the holder side terminal to elastically support both ends of the holder side terminal. Thus, it is possible to compensate for an eccentric pressure without the bridge as described above. 
     Additionally, the connection member may be configured to elastically support a rear surface of the holder side terminal while electrically connecting the power supply terminal to the holder side terminal. Thus, an eccentricity at a predetermined level can be compensated, and a smooth electric current flow can be made when the connection member is used as a medium for an electric connection between the power supply terminal and the holder side terminal. 
    
    
     
       DESCRIPTION OF DRAWINGS 
         FIG. 1  is a conceptual view illustrating a refrigerator according to an embodiment of the present disclosure; 
         FIG. 2  is a conceptual view illustrating a shelf of the refrigerator of  FIG. 1 ; 
         FIG. 3  is a cross-sectional view taken along the line A-A of  FIG. 2 ; 
         FIG. 4  is a conceptual view illustrating an inner rear wall of the refrigerator main body of  FIG. 1 ; 
         FIGS. 5 and 6  are conceptual views illustrating a power supply module according to an embodiment of the present disclosure, showing a connection state of a shelf terminal unit and a holder terminal unit; 
         FIG. 7  is a disassembled perspective view of the shelf terminal unit of  FIG. 5 ; 
         FIG. 8  is a disassembled perspective view of the holder terminal unit of  FIG. 5 ; 
         FIG. 9  is a conceptual view illustrating main elements of the holder terminal unit of  FIG. 5 ; 
         FIG. 10  is a cross-sectional view taken along the line B-B of  FIG. 5 ; 
         FIGS. 11( a ) and ( b )  are conceptual views illustrating the states that the shelf terminal unit is in a non-contacting state with the terminal unit (a), and that the shelf terminal unit is in a contact state with the terminal unit (b), respectively; 
         FIGS. 12 a  through 12 c    are conceptual views illustrating a coupling procedure between the shelf terminal unit and the holder terminal unit; 
         FIG. 13  is a conceptual view illustrating the power supply module according to another embodiment of the present disclosure; 
         FIG. 14  is a conceptual view illustrating main elements of the holder terminal unit of  FIG. 13 ; 
         FIG. 15  is a conceptual view illustrating the power supply module according to a still another embodiment of the present disclosure; and 
         FIG. 16  is a conceptual view illustrating main elements of the holder terminal unit of  FIG. 15 . 
     
    
    
     MODE FOR INVENTION 
     Description will now be given in detail according to exemplary embodiments disclosed herein, with reference to the accompanying drawings. For the sake of brief description with reference to the drawings, the same or equivalent components may be provided with the same or similar reference numbers, and description thereof will not be repeated. 
     The accompanying drawings are used to help easily understand various technical features and it should be understood that the embodiments presented herein are not limited by the accompanying drawings. As such, the present disclosure should be construed to extend to any alterations, equivalents and substitutes in addition to those which are particularly set out in the accompanying drawings. 
     A singular representation may include a plural representation unless it represents a definitely different meaning from the context. Further, it will be understood that although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are generally only used to distinguish one element from another. 
       FIG. 1  is a conceptual view illustrating a refrigerator according to an embodiment of the present disclosure,  FIG. 2  is a conceptual view illustrating a shelf of the refrigerator of  FIG. 1 , and  FIG. 3  is a cross-sectional view taken along the line A-A of  FIG. 2  FIG. 
     Referring to  FIG. 1 , a refrigerator main body  110  includes a storage space for storing foodstuffs therein. The storage space may be divided into a refrigerating chamber  111  and a freezing chamber  112  according to a set temperature. 
     In this embodiment, though a bottom freezer type refrigerator in which the refrigerating chamber  111  is disposed at an upper portion and the freezing chamber  112  is disposed at a lower portion, the present disclosure is not limited thereto. The present disclosure may be applied to a side by side type refrigerator in which the refrigerating chamber and the freezing chamber are disposed at left and right sides and a top mount type refrigerator in which the freezing chamber is disposed above the refrigerating chamber. 
     A door  120  is coupled to a refrigerator main body  110  so that a front opening  110   a  of the refrigerator main body  110  may be opened or closed. The door  120  may be embodied in various types, that is, a revolving type in which the door  120  is rotatably coupled to the refrigerator main body  110 , and a drawer type in which the door  120  is coupled to the refrigerator main body  110  in a slide movable manner. 
     The refrigerator  100  includes at least one accommodation unit  130  (for instance, a shelf  131 , a tray  132 , a basket  133 , and the like) for efficient use of the storage space. For instance, the shelf  131  and the tray  132  may be disposed within the refrigerator main body  110 , and the basket  133  may be disposed at an inside of the door  120  coupled to the refrigerator main body  110 . 
     The shelf  131  is formed in a plate shape and disposed horizontally within the refrigerator main body  110  so that food stuffs may be put thereon. The shelf  131  can be fixed to a frame  170  installed on an inner rear wall  114  by being hooked thereto. 
     The tray  132  forms a space which is divided by other storage spaces within the refrigerator  100  so that foodstuffs may be stored thereon. The tray  132  may be supported on an inner bottom surface of the refrigerator main body  110  and may be moved in a slide manner on the bottom surface when installing. 
     Hereinafter, the shelf  131  will be described more specifically. 
     Referring to  FIGS. 2 and 3 , the shelf  131  includes shelf frames  131   a ,  131   b  and  131   c , and an upper plate  131   d.    
     The shelf frames  131   a ,  131   b  and  131   c  form a basic framework of the shelf  131  and configured to be installed to the refrigerator main body  110 . The shelf frames  131   a ,  131   b  and  131   c  are configured by a combination of a plurality of shelf frames. Each of the shelf frames  131   a ,  131   b  and  131   c  may be formed of a metallic material of high strength or a synthetic resin material. 
     In this embodiment, it is exemplified shown that the shelf frames  131   a ,  131   b  and  131   c  are configured to include a side bracket  131   a , an upper frame  131   b  and a cover frame  131   c.    
     The side bracket  131   a  is provided at both sides of the shelf  131  and formed to extend in the lengthwise direction of the shelf  131 . The side bracket  131   a  is formed to be hooked and fixed to the frame  170  disposed at an inner rear wall  114  of the refrigerator main body  110 , and for this purpose, may include a hook part  131   a ′ and an insertion part  131   a ″. The structure to install the shelf  131  to the refrigerator main body  110  will be described in detail later. 
     The upper frame  131   b  is coupled to the side brackets  131   a  at both sides of the shelf  131 , respectively, to provide an installation space onto which the upper plate  131   d  is covered. For this purpose, the upper frame  131   b  may be formed in a loop type having an opening corresponding to the installation space. 
     The upper plate  131   d  is disposed on the upper frame  131   b  so that foodstuffs can be placed thereon. The upper plate  131   d  may be formed of a transmissive material (for instance, a reinforced plastic, a tempered glass, or the like), and in this instance, the upper frame  131   b  may be fabricated to support a rib portion of the upper plate  131   d.    
     The cover frame  131   c  is coupled to a front side of the shelf  131  to make clear an appearance of the front side which may be exposed to a user. 
     Meanwhile, an electric connection to electronic devices provided at the shelf  131  may be required. However, in case of the shelf  131  which is installed by being inserted from the outside to the inside of the refrigerator  100 , a general power supply structure using a cable has a difficulty in the assembling work. Further, due to the humid environment inside the refrigerator  100 , a sealing is very important factor of the power supply structure. 
     Hereinafter, considering an installation method of the shelf  131  and the internal environment of the refrigerator  100 , a power supply structure of a lighting apparatus  160  disposed at the shelf  131  will be described as an example of a power supply structure which enables an easy electric connection between the refrigerator main body  110  and the shelf  131 . 
     A lighting apparatus  160  which illuminates the shelf  131  may be provided at the shelf  131 . In this embodiment, a configuration that the lighting apparatus  160  is disposed at a front side of the shelf  131  to illuminate a light downwardly is exemplified shown, but not limited thereto. The lighting apparatus  160  may be configured to illuminate one region or the whole region of the shelf  131 . 
     The lighting apparatus  160  includes a light source  161  and a light guide member  162  which are disposed at the shelf  131  to illuminate at least one part of the shelf  131 . 
     The light source  161  is configured to emit a light by receiving a power. A high brightness LED may be used as the light source  161 . In this embodiment, the light source  161  is provided in plural and disposed to be spaced apart from each other on a front end portion of the shelf  131  along the width at a preset interval. 
     The light guide member  162  is configured to guide a light emitted from the light source  161 . To this end, the light guide member  162  may be formed of a transmissive material. The light guide member  162  may be extended along a width at a front end portion of the shelf  131 . 
     Referring to  FIG. 3 , the light source  161  may be installed to a rear surface of a front end of the upper plate  131   d , and the light guide member  162  may be installed to a rear surface of a front end of the upper plate  131   d  to cover the light source  161 . 
     A shield member  163  may be attached to a rear surface at a front end of the upper plate  131   d  to cover the light source  161  and the light guide member  162  when seeing from outside except a bottom surface. Further, a light may be directed toward a lower side of the shelf  131  by the shield member  163 . 
     Meanwhile, a shelf terminal unit  150  is provided to the shelf  131  to supply a power to the lighting apparatus  160  disposed at the shelf  131 . 
     The shelf terminal unit  150  is electrically connected with the lighting apparatus  160  (exactly, a light source  161  which needs a power supply), and the shelf  131  is configured to be electrically connected with a holder terminal unit  140  when installing the shelf  131  to the refrigerator main body  110 . As shown, the shelf terminal unit  150  may be disposed at at least a rear end of the one side bracket  131   a , and electrically connected to the lighting apparatus  160  through a cable. 
       FIG. 4  is a conceptual view illustrating an inner rear wall  114  of the refrigerator main body  110  of  FIG. 1 . 
     Referring to  FIG. 4 , a frame  170  is disposed at an inner rear wall  114  of the refrigerator main body  110  corresponding to the shelf terminal unit  150 . The frame  170  is formed to be extended upwardly and downwardly, and a plurality of openings  170   a  is formed in the extended lengthwise direction at a preset interval. 
     The shelf  131  is mounted to the frame  170  so as to be fixed at its position. The hook part  131   a ′ of the side bracket  131   a , as described above, is configured to be inserted into and hooked by an opening  170   a  of the frame  170 , and an insertion part  131   a ″ is configured to be inserted into another opening  170   a.    
     Meanwhile, a holder terminal unit  140  is provided between the opening  170   a  in which the hook part  131   a ′ is inserted and the opening  170   a  in which the insertion part  131   a ″ is inserted so that the shelf terminal unit  150  is connected to the holder terminal unit  140  when mounting the shelf  131  to the frame  170 . 
     The opening  170   a  in which the hook part  131   a ′ is inserted, the holder terminal unit  140  (the opening  141 ′ is covered by a cover  144 ) in which the shelf terminal unit  150  is inserted, and the opening  170   a  in which the insertion part  131   a ″ is inserted are sequentially disposed on the frame  170  in the upper and lower directions, and they may be provided at positions where the shelf  131  may be mounted. 
     In this instance, the opening  170   a  in which the hook part  131   a ′ is inserted and the opening  170   a  in which the insertion part  131   a ″ is inserted may be used in common. Thus, as shown, the opening  170   a  and the holder terminal unit  140  may be provided repeatedly in order. 
       FIGS. 5 and 6  are conceptual views illustrating a power supply module according to an embodiment of the present disclosure, showing the connection state of the shelf terminal unit  150  and the holder terminal unit  140 . 
     Referring to the above drawings, a power supply module is provided to at least one structural element of the shelf  131  which needs to be connected to a power source. Hereinafter, as the structure which needs to be connected to a power source, the light source  161  will be described as an example. 
     The power supply module includes a holder terminal unit  140  provided at the refrigerator main body  110  and a shelf terminal unit  150  provided at the shelf  131  which is detachably disposed at the refrigerator main body  110 . 
     The holder terminal unit  140  is electrically connected to the power supply unit and configured to be connected to the shelf terminal unit  150  when the shelf  131  is installed to the refrigerator main body  110 . Thus, when the shelf  131  is installed to the refrigerator main body  110 , a power is supplied to the light source  161  by a connection between the holder terminal unit  140  and the shelf terminal unit  150 . 
     Meanwhile, the installation position (height) of the shelf  131  may be variously changed as user&#39;s needs. To this end, a plurality of openings  170   a  is provided at the frame  170  in the extended lengthwise direction at a preset interval, and a hook part  131   a ′ configured to be inserted into one of the plural openings  170   a  and hooked to the frame  170  is provided at an upper part of the shelf  131 . An insertion part  131   a ″ is provided at a lower portion of the shelf  131  so as to be inserted into another opening among the plural openings  170   a.    
     Considering such an installation structure of the shelf  131 , the holder terminal unit  140  is provided in plural to correspond to preset positions where the shelf  131  may be installed so that a power supply to the light source  161  can be made even though the shelf  131  is installed on any position. For instance, as shown in  FIG. 4 , the holder terminal unit  140  may be installed between the plural openings  170   a  of the frame  170 . 
     The shelf terminal unit  150  is provided at a rear side of the shelf  131  so as to be connected to the holder terminal unit  140  when the shelf  131  is installed within the refrigerator main body  110 . As will be described later, when the shelf  131  is installed within the refrigerator main body  110 , the shelf terminal unit  150  is in contact with and electrically connected to the holder terminal unit  140 . 
     That is, when the shelf  131  is moved to the inner rear wall  114  of the refrigerator main body  110  and installation is completed, a connection between the holder terminal unit  140  and the shelf terminal unit  150  can be made simultaneously. Accordingly, since a separate process for connection of a power source is not necessary except installation of the shelf  131 , an assembling convenience can be enhanced. 
     Meanwhile, a cable  146  for an electrical connection between the holder side terminal  142  (refer to  FIG. 8 ) and the power supply unit is connected to the holder terminal unit  140 . The cable  146  may be electrically connected to a bridge  145  (refer to  FIG. 8 ) which will be described later. For instance, the cable  146  may be coupled to a forcible contacting blade of the bridge  145  in a forcible contacting manner, and a holder cover  141   b  may be coupled to a holder body  141   a  so as to cover the cable  146  coupled to the bridge  145 . 
     The cable  146  may include two cables  146  which may be connected to a (+) terminal and a (−) terminal of each bridge  145 , respectively. In this instance, each bridge  145  may be disposed to be spaced apart from each other in a widthwise direction of the holder terminal unit  140  so that the two cables  146  may be connected in upper and lower directions of the frame  170 , respectively, without any interference with each other. 
     Hereinafter, the shelf terminal unit  150  and the holder terminal unit  140  which constitute the power supply module will be described in detail. 
       FIG. 7  is a disassembled perspective view of the shelf terminal unit  150  of  FIG. 5 . 
     Referring to  FIG. 7 , the shelf terminal unit  150  is electrically connected to the light source  161 . The shelf terminal unit  150  is configured to be connected to the holder terminal unit  140  when the shelf terminal unit  150  is installed within the refrigerator main body  110 , so that the light source  161  is electrically connected to the power source. 
     The shelf terminal unit  150  includes a shelf terminal housing  151 , a shelf side terminal  152  and a cable  153 . 
     The shelf terminal housing  151  is disposed at a rear side of the shelf  131 , and may have a configuration to protrude from one rear end of the side bracket  131   a , as shown in  FIG. 3 . Preferably, the shelf terminal housing  151  is formed of a synthetic resin material. 
     The shelf terminal housing  151  may include a shelf terminal body  151   a  and a shelf terminal cover  151   b . The shelf terminal body  151   a  is provided with a terminal accommodation recess  151   a ′ in which the shelf side terminal  152  is installed and a cable accommodation recess  151   a ″ in which the cable  153  is installed, respectively. The shelf terminal cover  151   b  is coupled to the shelf terminal body  151   a  to cover the shelf side terminal  152  and the cable  153  which are accommodated in the terminal accommodation recess  151   a ′ and the cable accommodation recess  151   a ″, respectively. 
     The shelf side terminal  152  is installed in the terminal accommodation recess  151   a ′ and part thereof is exposed to outside of the terminal housing  151 . In the drawing, it is exemplified shown that the shelf side terminal  151  includes a first shelf side terminal  152   a  and a second shelf side terminal  152   b  at its upper and lower sides, respectively. Here, the first and second shelf side terminals  152   a  and  152   b  may constitute a (+) terminal and a (−) terminal, or vice versa. 
     The cable  153  is configured to electrically connect the shelf side terminal  152  to the light source  161 . In the drawings, it is exemplified shown that the cable  153  includes a first cable  153   a  and a second cable  153   b  which correspond to the first shelf side terminal  152   a  and the second shelf side terminal  152   b , respectively. 
     Hereinafter, the holder terminal unit  140  which is configured to be electrically connected to the shelf terminal unit  150  will be described. 
       FIG. 8  is a disassembled perspective view of the holder terminal unit  140  of  FIG. 5 , and  FIG. 9  is a conceptual view illustrating main elements of the holder terminal unit  140  of  FIG. 5 . 
     Referring to  FIGS. 8 and 9 , the holder terminal unit  140  is configured to be electrically connected to the power supply and to the shelf  131  when installation of the shelf  131  within the refrigerator main body  110  is completed. 
     The holder terminal unit  140  includes a holder  141 , a holder side terminal  142 , an elastic member  143 , a cover  144  and a bridge  145 . 
     The holder  141  is installed to a frame  170  which is provided on an inner rear wall  114  of the refrigerator main body  110 , and includes an opening  141 ′ which is opened toward a front of the refrigerator  100 . Here, the remaining portion of the holder  141  except a front portion corresponding to the opening  141 ′ may be accommodated within the frame  170  or disposed at a rear surface of the frame  170  so that the cover  144  which covers the opening  141 ′ may be exposed to outside toward a front side. 
     As described hereinbefore, the holder  141  may be provided to correspond to each preset position where the shelf  131  may be installed so that a power may be supplied to the light source  161  even though the shelf  131  is installed on any position. For instance, the holder  141  may be disposed to be spaced apart from each other at a predetermined interval in upper and lower lengthwise directions of the refrigerator main body  110 . 
     The holder  141  may include a holder body  141   a  and a holder cover  141   b . The holder  141  is preferably formed of a synthetic resin material. 
     The holder body  141   a  and the holder cover  141   b  may be formed in various types. In the drawings, it is shown that the holder body  141   a  is formed to have opened front and rear sides, and the holder cover  141   b  is coupled to cover a rear opening of the holder body  141   a . For coupling the holder body  131   a  and the holder cover  141   b , the holder body  131   a  and the holder cover  141   b  may be provided with hooks  141   a ′ and  141   b ″ and a hook recess  141   a ″ or  141   b′.    
     In the above configurations, the holder side terminal  142 , the elastic member  143  and the bridge  145  are accommodated within the holder body  141   a . The holder cover  141   b  is mounted to the holder body  141   a , and configured to support and fix the holder side terminal  142 , the elastic member  143  and the bridge  145  accommodated within the holder body  141   a  so as not to be pushed backward. 
     The holder side terminal  142  is electrically connected to the power supply and provided to correspond to the shelf side terminal  152 . Specifically, the holder side terminal  142  is disposed to face the shelf side terminal  152  towards a front side of the refrigerator  100 . 
     The holder side terminal  142  is configured to be movable to inner or outer side, that is, draw near or grow distant to the opponent shelf side terminal  152 . The holder side terminal  142  may be formed by bending a metallic member in plural times. In the drawings, it is exemplified shown that the holder side terminal  142  is formed in “⊏” shape, viewing from an upper side. 
     Meanwhile, the shelf  131  is formed to have a width corresponding to a distance between both inner side walls of the refrigerator main body  110 , but it is preferable that the width of the shelf  131  is shorter than a distance between both inner side walls of the refrigerator main body  110 , to facilitate an easy installation. In this instance, the shelf  131  may have some movements in the left and right directions in the installation procedure of the shelf  131 , and it means that a movement in the left and right directions may also exist in the shelf side terminal  152 . The holder side terminal  142  is formed to have a shape long in left and right directions, considering such assembling dispersion and dimension dispersion. 
     The holder  141  may be provided with a guide rib  141   c  which is extended in a movement direction of the holder side terminal  142  to guide inner and outer movements of the holder side terminal  142 . In the drawings, it is exemplified shown that the guide rib  141   c  is extended on the holder cover  141   b  toward the front, and a holder side terminal  142  is accommodated within the guide rib  141   c . According to the above configuration, the holder side terminal  142  is configured to slidably move along the guide rib  141   c , thus its movement is limited to one direction. 
     An elastic member  143  is provided at a rear surface of the holder side terminal  142  to elastically support the holder side terminal  142 . Thus, the holder side terminal  142  may contact the shelf side terminal  152  with a pressure when the shelf  131  is installed to the refrigerator main body  110 . 
     In this embodiment, it is exemplified shown that the elastic member  143  is configured by a compression spring, but not limited thereto. The elastic member  143  may be configured by any member which has an elasticity, like a leaf spring or a rubber. 
     As an example of the support structure of the elastic member  143 , the elastic member  143  may be supported by an inner wall of the holder  141  and the bridge  145 , respectively. Further, the holder cover  141   b  may include an elastic member accommodation part  141   e  (refer to  FIGS. 10 and 11 ) for accommodating one end of the elastic member  143 . 
     For reference, as another example of the support structure of the elastic member  143 , the elastic member  143  may be supported by an inner wall of the holder  141  and a rear surface of the holder side terminal  142 , respectively. 
     Meanwhile, due to a humid environment inside the refrigerator  100 , the power supply module provided in the refrigerator  100  may be exposed to moisture. When a frost is formed on the power supply module due to the moisture, a problem in the reliability of the electrical connection between the shelf side terminal  152  and the holder side terminal  142  may occur. 
     Considering this, a cover  144  is mounted to the holder  141  to cover the front opening  141 ′. In  FIG. 8 , there is shown that a hook  141   a ″ is formed on the holder body  141   a  and a hook recess  144   d  in which the hook  141   a ″ is inserted is formed on the cover  144 , for a coupling between the holder  141  and the cover  144 . 
     The cover  144  is configured to limit introduction of moisture into the holder  141 , and provides cutout portions  144   a ,  144   b  and  144   c  through which the shelf side terminal  152  may pass. 
     That is, since at least part of the shelf side terminal  150  is inserted into the holder  141  through the cutout portions  144   a ,  144   b  and  144   c , and most part of the front opening  141 ′ of the holder  141  is covered by the cover  144  through the cutout portions  144   a ,  144   b  and  144   c , introduction of moisture is limited. 
     The cover  144  is preferably formed of an elastically deformable material (for instance, rubber, silicon, and the like). In this case, the cover  144  may be pushed in so as to be in contact with the shelf terminal unit  150  with pressure when inserting the shelf terminal unit  150 . 
     The cutout portions may be divided by a main cutout portion  141   a , a first cutout portion  141   b  and a second cutout portion  141   c , as shown. 
     Specifically, the main cutout portion  141   a  is formed to be cut upward and downward in a lengthwise direction of the cover  144 , and the first and second cutout portions  144   b  and  144   c  are extended at both ends of the main cutout portion  144   a  in the left and right directions of the main cutout portion  144   a.    
     According to the above configuration, though the shelf terminal unit  150  is inserted to slant to one side based on the main cutout portion  144   a  and the one side is pushed in, the other side still covers the opening  141 ′ so that introduction of moisture may be limited at a certain level. 
     As another example of the cutout portions  144   a ,  144   b  and  144   c , on the contrary to the above example, the main cutout portion  144   a  is formed to be cut in the widthwise direction of the cover  144  at left and right sides, and the first and second sub cutout portions  144   b  and  144   c  are provided at both ends of the main cutout portion  144   a  and extended to both the upper and lower sides of the main cutout portion  144   a.    
     Meanwhile, the holder side terminal  142  is formed to have a shape long in left and right directions, considering the assembling dispersion, as described above. When the shelf terminal  150  is inserted into the holder side terminal  142  as a slanted state toward one side of the holder side terminal  142 , a movement failure of the holder side terminal  142  (for instance, a problem that the holder side terminal  142  is caught and hang over by the holder  141 ) may occur. 
     To improve such a problem, a bridge  145  may be provided to a rear surface of the holder side terminal  142  to elastically support both sides of the rear surface of the holder side terminal  142 . That is, the bridge  145  is configured to compensate for an eccentric pressure which is generated by pressing one side of the holder side terminal  142 . 
     As shown in  FIG. 9 , for instance, the bridge  145  includes a support part  145 ′ and a connection part  145 ″. 
     Referring to the drawing, the structure of the bridge  145  will be described in more detail. The support part  145 ′ is extended in a lengthwise direction on the rear surface of the holder side terminal  142  so as to support both sides of the holder side terminal  142 . 
     In this instance, the support part  145 ′ may be formed to have a shape bent a plurality of times and configured to support both sides of the holder side terminal  142 , but not in contact with a central portion of the holder side terminal  142 . According to such a configuration and support structure of the support part  145 ′, since a pressure is applied to both ends of the holder side terminal  142  rather than a central portion, an eccentric pressure to the holder side terminal  142  can be more efficiently compensated. 
     Meanwhile, the elastic member  143 , as described before, may be located to correspond to a central portion of the support portion  145 ′. To fix the elastic member  143 , a hook (not shown) may be provided at a central portion of the support part  145 ′. For reference, the disposition of the elastic member  143  is not limited to the above structure. The elastic member  143  may be disposed at both sides of the support part  145 ′, respectively. 
     The connection part  145 ″ is extended along the line to cross the lengthwise direction of the support part  145 ′ (in this embodiment, in a vertical direction) and elastically supported by the holder  141 . To efficiently compensate for the eccentric pressure of the holder side terminal  142 , the connection part  145 ″ is preferably located at a central portion of the support part  145 ′. 
     By such a connection structure of the support part  145 ′ and the connection part  145 ″, the bridge  145  forms a substantially ‘T’ shaped leaf spring. 
     Meanwhile, when a power is applied via the elastic member  143 , since the specific resistance of the elastic member  143  is high, a trouble in an electric connection between the power supply and the holder side terminal  142  may occur. 
     Specifically, when an applied voltage is low (for instance, a DC power), a current value which is input to the light source  161  may be lowered due to the elastic member  143  which has a high specific resistance. This may influence the brightness of the light emitted from the light source  161  (operated at a weak brightness), or even in a severe case, the light source  161  does not work. That is, when the applied voltage is low, the resistance of the elastic member  143  may deteriorate the electrical connection between the power supply and the light source  161  and influence the brightness of the light source  161 . 
     For reference, when the input voltage is high (for instance, AC power), the above issue may not be a matter. 
     To improve the above problems, the bridge  145  may be formed of a metallic material to electrically connect the power supply to the holder side terminal  142 . That is, the bridge  145 , which is configured to compensate for an eccentricity of the holder side terminal  142 , may be used as a medium for an electric connection between the power supply and the holder side terminal  142 . 
     For instance, the connection part  145 ″ may be electrically connected to the power supply, and the support part  145 ′ of the bridge  145  may be configured to be in contact with the holder side terminal  145  to transmit a current applied from the power supply to the holder side terminal  142 . 
     For reference, the elastic member  143  is in contact with the bridge  145 , but the specific resistance of the elastic member  143  is high so that current does not flow through the elastic member  143 . Thus, the elastic member  143  does not influence an electric connection between the power supply and the holder side terminal  142 . 
       FIG. 10  is a sectional view taken along the line B-B of  FIG. 5 , and  FIGS. 11( a ) and ( b )  are conceptual views illustrating the states that the shelf terminal unit is in a non-contacting state with the terminal unit (a), and that the shelf terminal unit is in contact state with the terminal unit (b). 
     Referring to  FIGS. 10 and 11 ( a ) and ( b ) with previous drawing  FIG. 8 , the holder side terminal  142  as described above is configured to correspond to the shelf side terminal  152 . In this embodiment, since the shelf side terminal  152  is provided with a first shelf side terminal  152   a  and a second shelf side terminal  152   b  which are disposed at front and rear sides thereof, respectively, the holder side terminal  142  is provided with a first holder side terminal  142   a  corresponding to the first shelf side terminal  152   a  and a second holder side terminal  142   b  corresponding to the second holder side terminal  152   b.    
     Thus, the first and second holder side terminals  142   a  and  142   b  are disposed to be spaced apart from each other at front and rear sides at a predetermined interval. Here, the first and second holder side terminals  142   a  and  142   b  may constitute a (+) terminal and a (−) terminal, or vice versa. 
     In the above configuration, the first and second holder side terminals  142   a  and  142   b  should be electrically separated from each other. For insulation between the first and second holder side terminals  142   a  and  142   b , the holder  141  may include an insulation jaw  141   d  which is interposed between the first holder side terminal  142   a  and the second holder side terminal  142   b . In the drawings, it is exemplified shown that the insulation jaw  141   d  is disposed at the holder cover  141   b.    
     Meanwhile, the insulation jaw  141   d  is provided at its upper and lower parts with a guide rib  141   c  which is configured to guide inner and outer movements of the first and second holder side terminals  142   a  and  142   b.    
     The guide rib  141   c  provided at an upper side of the insulation jaw  141   d  may be disposed to cover upper and both side surfaces of the first holder side terminal  142   a , and the guide rib  141   c  provided at a lower side of the insulation jaw  141   d  may be disposed to cover lower and both side surfaces of the second holder side terminal  142   b.    
     By the above configuration, the first and second holder side terminals  142   a  and  142   b  may be guided in inner and outer directions along the guide rib  141   c  and the insulation jaw  141   d.    
     Ends of the first and second holder side terminals  142   a  and  142   b  are formed to protrude from the guide rib  141   c  and the insulation jaw  141   d  so as to be in contact with and to apply a pressure to the first and second shelf side terminals  152   a  and  152   b.    
     The shelf terminal unit  150  (strictly, the shelf terminal housing  151 ) may be configured to be hooked by the insulation jaw  141   d  when the shelf  131  is inserted into the refrigerator main body  110  more than a predetermined depth. Thus, an insertion length of the shelf terminal unit  150  into the holder  141  may be limited, thereby preventing damage of the holder terminal unit  140  due to an excessive insertion of the shelf terminal unit  150 . 
       FIG. 11( a )  may be understood to show a state that before the holder side terminal  142  is pressed, and  FIG. 11 ( b )  may be understood to show a state that the shelf terminal body  151   a  is hooked by the insulation jaw  141   d  by being inserted into the holder  141  at a maximum. 
     Referring to the above, the holder side terminal  142  may move to inside as much as a maximum moving distance (L), and the maximum moving distance (L) may be appropriately adjusted by the protrusion length of the insulation jaw  141   d . Also, the maximum moving distance (L) may be appropriately adjusted by the shape of the shelf terminal body  151   a  corresponding to the insulation jaw  141   d.    
     Meanwhile, referring to  FIG. 10 , a groove  151 ′ which is recessed inwardly may be formed between the first shelf side terminal  152   a  and the second shelf side terminal  152   b  of the shelf terminal housing  151 , 
     According to the above configuration, though water drops formed by moisture within the refrigerator flows along the first shelf side terminal  152   a , the water drops are collected within the groove  151 ′, thereby preventing water drops from flowing to the second shelf side terminal  152   b  at a certain level. That is, a short circuit due to an electric conduction between the first shelf side terminal  152   a  and the second shelf side terminal  152   b  may be prevented. 
     In addition, the recess  151 ′ may be formed at a position opponent to the insulation jaw  141   d  so as to accommodate therein the insulation jaw  141   d . In this instance, when the shelf terminal housing  151  is inserted into the holder  141  more than a predetermined depth, the insulation jaw  141   d  is inserted into the recess  151 ′ so that the first shelf side terminal  152   a  and the second shelf side terminal  152   b  are located on upper and lower portions of the insulation jaw  141   d , respectively. That is, a structural barrier according to coupling (accommodating) of the insulation jaw  141   d  to the recess  151 ′ between the first shelf side terminal  152   a  and the second shelf side terminal  152   b , thereby preventing a short circuit therebetween. 
     Meanwhile, in a case where the holder side terminal  142  includes the first and second holder side terminals  142   a  and  142   b  which are disposed at upper and lower sides, bridges  145   a  and  145   b  corresponding to the first and second holder side terminals  142   a  and  142   b , respectively, may be installed as below. 
     The bridge  145  is configured to correspond to the holder side terminal  142 . That is, the bridge  145  includes a first bridge  145   a  corresponding to the first holder side terminal  142   a  and a second bridge  145   b  corresponding to the second holder side terminal  142   b.    
     A connection part  145 ″ of the first bridge  145   a  may be extended upwardly and a connection part  145 ″ of the second bridge  145   b  may be extended downwardly. Here, the first and second bridges  145   a  and  145   b  are different in their installation direction, but may be formed in the same shape as the bridge  145 , as described above. 
     According to the above configuration, an eccentric pressure applied to each holder side terminal  142   a  or  142   b  may be efficiently compensated for, without any structural interference of one holder side terminal  142   a  or  142   b  to another. 
     Meanwhile, referring to preceding drawings ( FIGS. 5 and 6 ), a cable  146  may be connected to the bridge  145 . The cable  146  is electrically connected to the power supply and supplies a power to the holder side terminal  142  through the bridge  145 . The cable  146  may be coupled to a forcibly contacting blade formed in the type of grove at the bridge  145  in a forcibly contacting manner, and the holder cover  141   b  may be coupled to the holder body  141   a  to cover the cable  146  fixed to the bridge  145 . 
     The cable  146  may include two cables  146  which are connected to each bridge  145  constituting (+) and (−) terminals. In this instance, the forcible contacting blade of each bridges  145   a  and  145   b  may be disposed to be spaced apart from each other in a widthwise direction. In such a configuration that plural holder terminals  140  are disposed to be spaced apart from each other in a lengthwise direction of the frame  170 , the two cables  146  can be connected without any interference therebetween in the lengthwise direction, thereby enhancing the assembling convenience. 
       FIGS. 12 a  through 12 c    are conceptual views illustrating a coupling procedure between the shelf terminal unit  150  and the holder terminal unit  140 . 
     Referring to those drawings, a frame  170  is disposed on an inner rear wall  114  of the refrigerator main body  110 , and a plurality of openings  170   a  are provided on the frame  170  in upper and lower directions. The plurality of openings  170   a  is provided in correspondence to the installation positions of the shelf  131 . 
     At least one holder terminal unit  140  may be provided within the frame  170 , and a front opening  140 ′ of the holder terminal unit  140  may be disposed between the plurality of openings  170   a . Here, as described above, the cover  144  is disposed so as to cover the front opening  141 ′ of the holder terminal unit  140 . 
     Meanwhile, the shelf  131  is provided with a hook part  131   a ′ which is configured to be inserted into one of the plurality of openings  170   a  and hooked to the frame  170 . The hook part  131   a ′ is formed at an upper part of the shelf  131 , and may have a shape bent downwardly. 
     A holder terminal unit  140  is provided at a lower portion of the opening  170   a  in which the hook part  131   a ′ is inserted, and the shelf terminal unit  150  is configured to contact the holder terminal unit  140  when the shelf  131  is installed to the frame  170 . 
     Specifically, as shown in  FIG. 12 b   , when the hook part  131   a ′ is started to be inserted into one of the plurality of openings  170   a  in a state that the shelf  131  is tilted at a predetermined angle, the shelf terminal unit  150 , which is provided at a lower portion of the hook part  131   a ′, is located to correspond to the holder terminal unit  140 . As the hook part  131   a ′ is gradually inserted into the opening  170   a , the shelf terminal unit  150  is inserted into the holder  141  after passing the cutout portions  144   a ,  144   b  and  144   c  of the cover  144 . 
     Thereafter, as shown in  FIG. 12 c   , when the hook part  131   a ′ inserted into the opening  170   a  is hooked by the frame  170 , at least part of the shelf terminal unit  150  is inserted into the opening  141 ′ and the shelf side terminal  152  is in contact with the holder side terminal  142  with a pressure. That is, an electrical connection between the shelf side terminal  152  and the holder side terminal  142  is performed so that the power is applied to the light source  161  provided at the shelf  131 . 
     In this instance, an insertion part  131   a ″ may be provided at a lower portion of the shelf terminal unit  150  so as to be inserted into one of the plurality of openings  170   a . The insertion part  131   a ″ plays a role to fix the shelf  131  to the frame  170  together with the hook part  131   a′.    
     According to such a configuration, the shelf terminal unit  150  is located between the hook part  131   a ′ and the insertion part  131   a ″. However, the present disclosure is not limited thereto. The fixture structure of the shelf  131  and the electrical connection structure of the shelf  131  may be variously modified. 
     Hereinafter, another embodiment of the power supply module according to the present disclosure will be described. 
     Unless otherwise specified, the structures of the power supply module described hereinafter may be equally applied to those as described hereinbefore. 
       FIG. 13  is a conceptual view illustrating the power supply module according to another embodiment of the present disclosure, and  FIG. 14  is a conceptual view illustrating main elements of the holder terminal unit  240  of  FIG. 13 . 
     In the preceding embodiment, a separate member such as the bridge  145  has been used to compensate for an eccentric pressure which is generated on account of pressing one side of the holder side terminal  142 . However, in this embodiment, a new structure is proposed to improve a movement failure of the holder side terminal  242  due to an eccentric pressure, without the bridge  145 . 
     To this end, an elastic member  243  is disposed at both sides of the holder side terminal  242 , respectively, to compensate for an eccentric pressure. That is, the elastic member  243  includes a first spring  243   a  and a second spring  243   b  which are disposed at both sides of the holder side terminal  242 . 
     Structurally, the first spring  243   a  may be supported by one rear surface of the holder side terminal  242  and an inner wall of the holder  241 , respectively, and the second spring  243   b  may be supported by the other rear surface of the holder side terminal  242  and the inner wall of the holder  241 , respectively. For reference, the first and second springs  243   a  and  243   b  may be two springs which have the same size, shape and physical properties, but disposed at different positions. 
     Meanwhile, the holder  241  may include a first spring accommodation part  241   e ′ and a second spring accommodation part  241   e ″, which are configured to accommodate therein each end of the first and second springs  243   a  and  243   b  and to fix the locations thereof. In  FIG. 13 , it is exemplified shown that the first and second spring accommodation parts  241   e ′ and  241   e ″ are formed at left and right sides of the holder cover  241   b , respectively. 
     In addition, at an inner side of the holder side terminal  242  to which each end of the first and second springs  243   a  and  243   b  is supported, first and second spring fixing parts  242   a  and  242   b  for fixing another end of the first and second springs  243   a  and  243   b  may be provided, respectively. In  FIG. 14 , it is exemplified shown that the first and second spring fixing parts  242   a  and  242   b  are formed in a hook type so as to be hooked to the other ends of the first and second springs  243   a  and  243   b.    
       FIG. 15  is a conceptual view illustrating the power supply module according to a still another embodiment of the present disclosure, and  FIG. 16  is a conceptual view illustrating main elements of the holder terminal unit  340  of  FIG. 15 . 
     This embodiment is proposed to improve a movement failure of the holder side terminal  342  by an eccentric pressure and a contact resistance problem when applying a power through a compression spring. 
     Referring to  FIGS. 15 and 16 , the holder terminal unit  340  is configured to be electrically connected to the power supply and the shelf  131  when installation of the shelf  131  within the refrigerator main body  110  is completed. 
     The holder terminal unit  340  includes a holder  341 , a holder side terminal  342 , an elastic member  343 , a cover (not shown), a power supply terminal  346 , and a connection member  347 . Among the above elements, descriptions of the elements except the power supply terminal  346  and the connection member  347  will be replaced by those as described with reference to the previous ones. 
     The power supply terminal  346  is mounted to the holder  341 , and electrically connected to the power supply. In this embodiment, it is exemplified shown that the power supply terminal  346  is mounted to the holder cover  341   b.    
     The connection member  347  is configured to be connected to the power supply terminal  346  and elastically support a rear surface of the holder side terminal  342 . The connection member  347  is formed of a metallic material and configured to electrically connect the power supply terminal  346  to the holder side terminal  342 . In this embodiment, the connection member  347  is shown to be formed of a leaf spring. 
     That is, the connection member  347  is configured to elastically support a rear surface of the holder side terminal  342 , while electrically connecting the power supply terminal  346  to the holder side terminal  342 , to compensate for an eccentricity at a certain degree. 
     To more specifically describe the structure of the present embodiment, the power supply terminal  346  is provided with a connection member accommodation groove  346   a  and an elastic member accommodation groove  346   b , respectively. 
     One end of the connection member  347  is hooked by the connection member accommodation groove  346   a  and another end thereof is configured to elastically support a central portion of the rear surface of the holder side terminal  342 . By such a configuration, the connection member  347  may be disposed in a slanted manner toward one side. 
     One end of the elastic member  343  is inserted into and fixed to the elastic member accommodation groove  346   b , and the holder  341  may include an elastic member accommodation part  341   e  which accommodates therein one end of the elastic member  343 . Further, another end of the elastic member  343  is inserted into and fixed to another end of the connection part  345   b  which is located at a central portion of a rear surface of the holder side terminal  342 . 
     Thus, the elastic member  343  may be supported by another end of the connection member  347  which elastically supports a rear surface of the holder side terminal  342  and the power supply terminal  346 , respectively. In this instance, the elastic member  343  may be positioned at a central portion of the holder side terminal  342 . 
     Meanwhile, the connection member  347  may be formed of a metallic material, and configured to electrically connect the power terminal  346  to the holder side terminal  342 . That is, the connection member  347  for compensating for an eccentricity of the holder side terminal  346  may be used as a medium for an electrical connection between the power supply terminal  346  and the holder side terminal  342 . 
     As the present features may be embodied in several forms without departing from the characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalents of such metes and bounds are therefore intended to be embraced by the appended claims.