JP4365877B2 - Contact pin - Google Patents

Description

  The present invention relates to a contact pin for electrically connecting a battery pack that is detachably attached to a battery housing portion of a mobile phone or other electronic device and a power supply line of a substrate built in the electronic device, and in particular, the electronic device is thin. It contributes to the transformation.

  A commercially available mobile phone has, as its basic configuration, a battery pack that is detachably attached to the battery housing and a built-in circuit board that operates with the power of the battery pack. The power supply line of the board is connected via a contact pin.

  In the field of mobile phones, development aimed at reducing the thickness is progressing one after another. In recent years, with the thinning of liquid crystal backlight units and battery packs, for example, thin mobile phones with a thickness of only about 11 mm have been developed and provided to the market. However, with the introduction of full-color organic EL displays, etc. Mobile phone thinning will accelerate. Further, similarly to mobile phones, PDA, notebook personal computers and other electronic devices developed with the aim of thinning can be easily predicted to accelerate thinning. In order to cope with such thinning of electronic devices, it is urgently required to reduce the thickness of the contact pins described above.

  As a contact pin employ | adopted with an electronic device, it is disclosed by patent document 1, for example. As shown in FIGS. 1 and 2, the contact pin of this document has an S-shaped spring portion (9) and a contact portion (7) provided at the tip thereof. When the contact (1a) at the tip of the contact portion (7) is pressed from the front surface, the S-shaped spring portion (9) is elastically deformed so as to be contracted, and the entire contact portion (7) is placed in the case (2). It has a structure that is pushed in.

  However, the contact pin of Patent Document 1 has a structure in which the contact portion (7) rises obliquely upward (see FIG. 10 of Patent Document 1), and further, an S-shaped spring portion (9) is provided. The contact portion (7) has a wide structure in the rising height direction. For this reason, since the height of the contact pin of Patent Document 1 is constrained by the rising height of the contact portion (7) and the spreading width of the S-shaped spring portion (9), a contact pin thinner than the rising height and spreading width is used. It cannot be obtained and cannot be applied to a thin mobile phone and other electronic devices expected in the future.

  In addition, since the contact pin of Patent Document 1 has a structure in which the contact portion (7) slides in the guide hole (not indicated), the contact portion (7) is caused by dust biting into the slide portion. However, there is also a problem that contact failure of the contact portion (7) is likely to occur due to being unable to protrude outside while sinking into the guide hole.

Japanese Patent Laid-Open No. 2004-22406

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a contact pin that is unlikely to cause poor contact and is suitable for thinning a mobile phone or other electronic devices.

In order to achieve the above object, the contact pin according to the present invention is an electrode portion provided on one side surface of a battery pack that is detachably attached to a battery housing portion of an electronic device, which is a recess having a bottom surface and four side surfaces. When, a contact pin to conduct and a power supply line of the built-in circuit board of the electronic device, the contact pins includes a case which is arranged on one side of the four sides of the battery accommodating part, the A plurality of pin bodies arranged in parallel to each other, each of the pin bodies being formed by bending a leaf spring material so as to have at least two zigzag folded portions, and the battery accommodating portion. an elastic portion which is capable of bending and stretching arranged in the direction along the bottom surface of, it is shaped bent on one end of the elastic portion, provided so as to be exposed to the outside of the case the bent portion as a tip With a contact portion to which the tip is in contact with the electrode portion of the battery pack, provided on the other end of the elastic portion consists connecting portion and connected to the power supply line of the built-in circuit board, wherein the casing is arranged The one side surface is a side surface that faces one side surface of the battery pack when the battery pack is accommodated in the battery accommodating portion while applying a pressing force from the electrode portion of the battery pack to the tip of the contact portion. And when a pressing force is applied from the electrode part of the battery pack to the tip of the contact part, the contact part is pushed so as to draw an arc in a lateral direction with respect to the bottom surface of the battery housing part, It is characterized by sliding on the surface of the electrode part. It is necessary to have at least two of these zigzag folding parts in order to ensure the spring restoring force of the pin body. However, since the pin body is attached to the case, it is accommodated in the case while maintaining the spring restoring force. Use as many numbers as possible.

  The contact portion may be bent in an inverted U shape, and an inner bent portion may be provided at a tip portion thereof.

  The width of the contact portion may be formed narrower than the width of the elastic portion.

  The leaf spring material may be bent into an M shape or a W shape.

  You may employ | adopt the structure by which the terminal made from the metal plate insert-molded at the time of resin molding of the said case is provided in the bottom face side of the said case.

  A groove for inserting the pin main body is provided on the bottom surface side of the case, and the pin main body is connected to the side of the other end side of the elastic portion and inserted from the groove. The pin main body may have a mounting portion for press-fitting mounting to the case, and the connection portion may be connected to the mounting portion.

  In the present invention, the “electronic device” may be a mobile phone. The “electronic device” includes a portable thin electronic device such as a PDA or a notebook personal computer.

  In the contact pin according to the present invention, as a specific configuration of the pin main body, a structure in which the elastic portion is arranged to be able to bend and stretch in the direction along the bottom surface of the battery housing portion is adopted. For this reason, since the pin body does not bend or stretch in the vertical direction with respect to the bottom surface of the battery housing portion, it is not necessary to secure the width necessary for the bending and stretching operation in the vertical direction in the vertical direction of the battery housing portion. This is suitable for reducing the thickness of the electronic apparatus.

  According to the contact pin of the present invention, when a pressing force is applied from the electrode portion of the battery pack to the tip of the contact portion, the contact portion draws an arc in a lateral direction with respect to the bottom surface of the battery housing portion. The structure that slides on the surface of the electrode part is adopted. For this reason, since the contact portion slides on the surface of the electrode, dust and other foreign matters between the contact portion and the electrode are eliminated, and poor contact is unlikely to occur, and a good contact state is always obtained.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings.

<First Embodiment>
1 is an external view of a mobile phone to which a contact pin according to a first embodiment of the present invention is applied, FIG. 2 is a cross-sectional view of the contact pin, and FIG. 6 is an operation explanatory view of the contact pin.

As shown in FIG. 1, the contact pin 1 is a means for electrically connecting the electrode portion C1 of the battery pack C that is detachably attached to the battery housing portion B of the mobile phone A and the power line E of the built-in circuit board D of the mobile phone A. Used as

As shown in FIG. 2, the contact pin 1 has a lateral direction of the battery housing portion B (see FIGS. 1A and 1B) , that is, one side surface of the four side surfaces of the battery housing portion B. When the battery pack C is accommodated in the battery accommodating portion B while applying a pressing force from the electrode portion C1 of the battery pack C to the tip of the contact portion 31, the side surface that opposes one side surface of the battery pack C. (Hereinafter, simply referred to as “side direction”) A resin case 2, a metal plate pin body 3 attached to the case 2, and a resin cover 4 attached to the case 2. Is done.

  FIG. 3 is an explanatory diagram of case 2. The case 2 is provided with three mounting holes 5 as shown in FIGS. 3B, 3D, and 3F. Both of the mounting holes 5 are open at both ends 5A and 5B, and inside the one end 5A. The shape is provided with a stepped portion 5C, and the pin body 3 can be inserted and set into the mounting hole 5 from the other end 5B side (see FIG. 6A). Further, claws 6 for attaching the cover 4 are formed on both side surfaces of the case 2 in a protruding manner.

  Further, a metal plate terminal 7 formed by insert molding at the time of resin molding of the case 2 is provided on the bottom side of the case 2. The terminal 7 protrudes outward from both side surfaces of the case 2 and is fixed to the built-in circuit board D of the mobile phone A by soldering or the like, thereby positioning and fixing the contact pin 1 at a fixed position.

  Since the terminal 7 has only a function as a means for positioning and fixing the contact pin 1 and is a separate part from the pin body 3, it is not necessary to make the same expensive metal as the pin body 3. It can be made of an inexpensive metal plate.

  FIG. 4 is an explanatory diagram of the pin body 3. As shown in FIG. 4A, the pin body 3 is formed by bending a leaf spring material into an M shape or a W shape so as to have three folded portions 30D, 30E, and 30F, and a bottom surface B1 of the battery housing portion B. The elastic part 30 is arranged so as to be able to bend and stretch in a direction along the direction (indicated by the arrow G in FIG. 6B), and is provided on one end 30A side of the elastic part 30 and contacts the electrode part C1 of the battery pack C. And a connecting portion 32 provided on the other end 30B side of the elastic portion 30 and connected to the power line E of the built-in circuit board D. The elastic part 30, the contact part 31, and the connection part 32 are formed by punching from a single metal plate.

  When the elastic portion 30 of the pin body 3 is inserted into the mounting hole 5 of the case 2 as shown in FIG. 6A, its M-shaped or W-shaped shoulder portion 30 </ b> C is a step portion 5 </ b> C of the mounting hole 5. I hit it. As a result, the stepped portion 5C serves as a stopper so that the entire pin body 3 does not fall out from the one end 5A of the mounting hole 5.

  2A, the contact portion 31 of the pin body 3 is bent in an inverted U shape when viewed from the case 2, and protrudes from the one end 5A of the mounting hole 5 so as to be exposed to the outside. The electrode part C1 can come into contact.

  The connection part 32 of the pin body 3 is bent at a right angle from the side of the other end 30B of the elastic part 30 and is soldered to the power line E of the built-in circuit board D.

  FIG. 5 is an explanatory diagram of the cover 4. The cover 4 includes side plate portions 41 that can be elastically deformed on both sides of the bottom plate portion 40, and an engagement hole 42 is formed in each side plate portion 41. By inserting and engaging the claws 6 on the side surface of the case 2 into the engagement holes 42, the cover 4 is attached and fixed to the case 2 with one touch, and the other end 5B side of each mounting hole 5 is closed by the cover 4. It is supposed to be.

  Further, the bottom plate portion 40 of the cover 4 presses the elastic portion 30 of the pin main body 3 inserted and set in the mounting hole 5 against the step portion 5 </ b> C of the mounting hole 5. As a result, the elastic portion 30 of the pin body 3 can be contracted and deformed in the M-shaped or W-shaped inner direction while being positioned in the mounting hole 5.

  Next, an operation example when the contact pin 1 configured as described above is applied to a mobile phone will be described with reference to FIGS.

  The contact pins 1 are arranged in the side direction of the battery housing part B as shown in FIG. When the battery pack C is accommodated in the battery accommodating portion B, the tip of the contact portion 31 of the contact pin 1 is pressed by the electrode portion C1 of the battery pack C while the battery pack C is obliquely inserted into the battery accommodating portion B (FIG. 6). (See arrow P in (b)).

  Thereby, the elastic part 30 of the contact pin 1 is contracted by a bending and stretching operation (see arrow G in FIG. 6A) along the bottom surface B1 of the battery housing part B, and the contact of the contact pin 1 according to the contraction amount. The part 31 is pushed into the mounting hole 5 so as to draw a circular arc (see arrow F in FIG. 6A) in the lateral direction with respect to the bottom surface B1 of the battery housing part B, and the contact part 31 and the electrode part of the battery pack C A contact state with C1 is obtained.

  Since the contact portion 31 slides on the surface of the electrode portion C1 by the pushing operation for drawing an arc as described above, dust and other foreign matters between the contact portion 31 and the electrode portion C1 are eliminated, and a good contact state is obtained. can get.

  When the battery pack C is removed from the battery housing part B, there is no pressing force acting on the contact part 31 of the contact pin 1, so the elastic part 30 of the contact pin 1 is extended by its spring restoring force, and depending on the extension amount, The contact portion 31 of the contact pin jumps out of the mounting hole 5 and returns to the original state before storing the battery pack.

  As described above, the contact pin 1 of the present embodiment has a structure in which the elastic portion 30 is disposed so as to be able to bend and stretch in the direction along the bottom surface B1 of the battery housing portion B as a specific configuration of the pin body 3. Adopted. For this reason, since the said pin main body 3 does not bend and stretch in the vertical direction with respect to the bottom face B1 of the battery accommodating part B, it is not necessary to ensure the width | variety required for the bending operation | movement of the vertical direction in the vertical direction of the battery accommodating part B. This is suitable for reducing the thickness of the mobile phone A. The height of the contact pin 1 is obtained by adding the thickness dimension of the case 2 to the width dimension of the elastic portion 30.

  Further, according to the contact pin 1 of the present embodiment, when a pressing force acts on the tip of the contact portion 31 from the electrode portion C1 of the battery pack C, the contact portion 31 is against the bottom surface B1 of the battery housing portion B. A structure that is pushed in to draw an arc in the horizontal direction and slides on the surface of the electrode portion C1 is employed. For this reason, since the contact portion 31 slides on the surface of the electrode portion C1, dust and other foreign matters between the contact portion 31 and the electrode portion C1 are eliminated, and poor contact is unlikely to occur, and a good contact state is always obtained. It is done.

  In the above embodiment, the mobile phone A is taken as an example and the contact pin 1 according to the present invention is applied to the mobile phone A. However, the contact pin 1 of the present invention is a thin electronic device other than the mobile phone A. It can also be applied to. Moreover, the number of the pin main bodies 3 is not limited to three, and may be more or less.

Second Embodiment
Next, a second embodiment of the contact pin of the present invention will be described.

  FIG. 7 is an explanatory view of the case and corresponds to FIG. 3, wherein (a) is a front view of the case, (b) is a top view, (c) is a side view, (d) is a bottom view, and (e) ) Is a cross-sectional view along line AA, and (f) is a rear view. FIG. 8 is an explanatory view of the pin main body and corresponds to FIG. 4 above, (a) is a front view of the pin main body, (b) is a right side view, (c) is a left side view, and (d) is a bottom view. FIG. FIGS. 9A and 9B are diagrams for explaining how to mount the pin body. FIG. 9A is a cross-sectional view illustrating an initial mounting state and FIG. 9B illustrating a state after mounting. 10A and 10B are diagrams for explaining the operation of the contact pin, corresponding to FIG. 6 above, where FIG. 10A shows a state in which no pressing force is applied to the contact portion, and FIG. (C) is a sectional view showing a state where a pressing force is further applied to the contact portion. 9 includes a cross-sectional view taken along the line BB in FIG. 7B, and FIG. 10 is a partial cross-sectional view taken along the line BB showing a state where the pin body is fixed in the case. The abbreviation is shown.

  In addition, in the following description and FIGS. 7-10, what has the same function as the structure and shape which were shown in the said 1st Embodiment, and attaches | subjects the same code | symbol is demonstrated, and said 1st Embodiment Only the different parts will be described, and the detailed description thereof is the same as described above, so the description thereof is omitted here.

  The main differences between the contact pin 1 in the present embodiment and that in the first embodiment are that the structure of the pin body 3 is greatly different, the cover 4 is not provided, and the case 2 This is a point having a groove 5E.

  Case 2 in this embodiment is configured as shown in FIG. Unlike the first embodiment, the bosses 8 and 8 are provided on the back side of the case 2 instead of the terminals 7 and 8. Boss holes (not shown) corresponding to the bosses 8 and 8 are provided at the place where the contact pins 1 of the built-in circuit board D of the cellular phone A are installed, and the bosses 8 and 8 are fitted into the boss holes. Thus, the contact pin 1 is fixed on the built-in substrate circuit D. Further, the internal structure is substantially the same as that of the first embodiment, but as shown in FIG. 9A, the step 5D that engages with the inner bending portion 31B is provided on the one end 5A side of the mounting hole 5. Have On the other hand, on the other end 5B side of the mounting hole 5, grooves 5E and 5E for fitting and fixing the pin body 3 to the case 2 are provided in the insertion direction X1 of the pin body 3 from the other end 5B of the mounting hole 5. Length is provided.

  The pin main body 3 in this embodiment is formed by bending a leaf spring member so as to have two zigzag folded portions 30D and 30E, and has an elastic portion 30, a contact portion 31, a connecting portion 32, and a mounting portion 33. . The pin main body 3 is integrally formed by punching and bending from a single metal plate.

  The elastic part 30 is not M-shaped or W-shaped but N-shaped or S-shaped. That is, as shown to Fig.8 (a), it consists of two zigzag folding parts 30D and 30E, and there is one zigzag folding part compared with the thing of the said 1st Embodiment. Note that the other end 30 </ b> B of the elastic portion extends in the length direction of the pin body 3, unlike the first embodiment.

  The shape of the contact portion 31 is substantially the same as that of the first embodiment when viewed from the front, but unlike the first embodiment, the contact portion 31 is bent inwardly toward the tip 31A side. An inner bending portion 31B is provided. The inner bent portion 31B functions as a stopper as will be described later in the operation state of the contact pin 1. On the other hand, in the state seen from the side, unlike the first embodiment, in this embodiment, the contact portion 31 bows forward from one end 30A of the elastic portion before the elastic portion 30 starts to bend. (See FIG. 10A). Therefore, the width L1 of the contact portion 31 is set to be narrower than the width L2 of the elastic portion 30. By configuring in this way, dust and other foreign matters between the contact part 31 and the electrode part C1 are excluded as compared with the first embodiment while maintaining the spring restoring force of the pin body 3. It is easy to be done, and it is hard to produce a contact failure, and a favorable contact state is always obtained.

  The connection part 32 is the same as that of the first embodiment in that it is soldered to the power supply line E of the built-in circuit board D. However, the connection part 32 is a mounting part 33 described later as shown in FIG. It is connected with the elastic part 30 via.

  The mounting portion 33 is substantially H-shaped when viewed from the front, and connecting portions 32 and 32 are connected to the central portion, that is, two concave portions of the H shape, respectively, and the grooves 5E of the case 2 are formed on both sides. Claws 33A and 33A are provided corresponding to 5E. With this configuration, the pin body 3 is difficult to come off from the case 2. Details will be described later.

  Next, with reference to FIG. 9, a method of mounting the pin body will be described.

  First, as shown in FIG. 9A, when the pin body 3 is inserted from the contact portion 31 into the other end 5B of the mounting hole of the case 2, the claws 33A and 33A of the mounting portion 33 are moved from the other end 5B of the mounting hole. It moves in the grooves 5E and 5E of the case 2 toward the one end 5A. Further, when the insertion is continued in the direction of the arrow X1, the depth of the grooves 5E and 5E disappears, the claws 33A and 33A are regulated inward by the inner walls 5F and 5F of the case 2, and the contact portion 31 protrudes from one end 5A of the mounting hole. In this state, the pin body 3 is press-fitted and fixed in the case 2. At this time, the inner bent portion 31B is engaged by the step portion 5D. In this way, by pressing the pin body 3 into the case 2, it is possible to prevent the pin body 3 from coming out of the case 2 even if it receives pressure from the outside.

  Next, the operation of the contact pin will be described with reference to FIG.

  Also in the present embodiment, the tip of the contact portion 31 is pressed by the electrode portion C1 of the battery pack C, whereby the pin main body 3 bends and the pin main body 3 biases the electrode portion C1. When the battery pack C is accommodated, when the battery pack C is removed, there is no pressing force acting on the contact portion 31, the pin body 3 returns to its original state by its spring restoring force, and the elastic portion 30 is the battery accommodation portion. About the point which employ | adopts the structure arrange | positioned so that bending in the direction along the bottom face B1 of B is the same as that of the said 1st Embodiment, below, only a different point is demonstrated.

  First, in the initial operation state, the contact pin 1 of the present embodiment is bent from one end 30A of the elastic portion so that the contact portion 31 bows forward (in the direction of the arrow Y1) as shown in FIG. 10 (a) Refer to a dotted line part). At this time, the inner bent portion 31 </ b> B operates so as to slide on the inner wall surface on the end 5 </ b> A side of the mounting hole of the case 2. Further, when the pin body 3 is pressed, the inner bent portion 31B comes into contact with the shoulder portion 30C of the elastic portion, and bending from the one end 30A of the elastic portion is suppressed. In the present embodiment, as described above, the width L1 of the contact portion 31 is set to be narrower than the width L2 of the elastic portion 30, and the inner bent portion 31B is provided, so that the elastic portion 30 bends. Before starting, the bending of the contact portion 31 proceeds. By doing so, dust and foreign matter adhering to the electrode part C1 and the contact part 31 can be quickly removed, and the operability is also improved.

  Further, when the pin body 3 is pressed, the state moves from the state shown in FIG. 10B to the state shown in FIG. 10C, and the arrow 30 while the one end 30A side of the elastic portion slides on the inner wall 5F of the case 2. While moving in the X2 direction, the contact portion 31 moves rearward (in the direction of arrow Y2), and the entire elastic portion 30 is bent so that the zigzag folding portions 30D and 30E of the elastic portion 30 are both bent downward. And the battery pack C will be accommodated in the battery accommodating part B in the state which the contact part 31 energized the electrode part C1 of the battery pack C. FIG.

  In summary, in the second embodiment, the width L1 of the contact portion 31 is set to be narrower than the width L2 of the elastic portion 30, and the inner bent portion 31B is provided at the tip 31A of the contact portion 31. did. Thereby, before the elastic part 30 begins to bend, the said bending of the contact part 31 will advance, and this can remove quickly the dust and foreign material adhering to the electrode part C1 and the contact part 31, and operativity. Also gets better.

1A and 1B are external views of a mobile phone to which a contact pin according to an embodiment of the present invention is applied. FIG. 1A is a rear view of the mobile phone, and FIG. FIG. 2 is a cross-sectional view of the contact pin, in which (a) is a front view of the contact pin, (b) is a top view thereof, and (c) is a side view thereof. FIG. 3 is an explanatory view of the case, in which (a) is a front view of the case, (b) is a top view thereof, (c) is a side view thereof, (d) is a bottom view thereof, and (e) is a bottom view thereof. AA line sectional view, (f) is a BB line sectional view. 4A and 4B are explanatory views of the pin body, wherein FIG. 4A is a front view of the pin body, FIG. 4B is a right side view thereof, FIG. 4C is a left side view thereof, and FIG. FIG. 5 is an explanatory view of the cover, in which (a) is a front view of the cover, (b) is a top view thereof, (c) is a side view thereof, (d) is a bottom view thereof, and (e) is a bottom view thereof. It is an AA line sectional view and (f) BB line sectional view. 6A and 6B are diagrams for explaining the operation of the contact pin, in which FIG. 6A is an explanatory diagram when the pressing force is not applied to the contact portion, and FIG. 6B is an explanatory diagram when the pressing force is applied to the contact portion. It is. It is explanatory drawing of the case in 2nd Embodiment of this invention, (a) is a front view of a case, (b) is a top view, (c) is a side view, (d) is a bottom view, (e) is A -A sectional view, (f) is a rear view. It is explanatory drawing of the pin main body in 2nd Embodiment of this invention, (a) is a front view of a pin main body, (b) is a right view, (c) is a left view, (d) is a bottom view. . It is a figure explaining the mounting method of the pin main body in 2nd Embodiment of this invention, (a) is a mounting | wearing initial state, (b) is sectional drawing which each shows the state after mounting | wearing. It is operation | movement explanatory drawing of the contact pin in 2nd Embodiment of this invention, (a) is the state when pressing force does not act on a contact part, (b) is the state when it begins to apply pressing force to a contact part, (C) is sectional drawing which shows the state which added further pressing force to the contact part, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Contact pin 2 Case 3 Pin main body 4 Cover 5 Mounting hole 5A One end 5B of mounting hole The other end 5C of mounting hole 5C Step part 5D Step part 5E Groove 5F Inner wall 6 Claw 7 Terminal 30 Elastic part 30A One end 30B of an elastic part The other end 30C The shoulder portions 30D, 30E, 30F of the elastic portion, the zigzag folding portion 31, the contact portion 31A, the tip 31B of the contact portion, the inner bending portion 32, the connection portion 33, the attachment portion 33A, the claw 40, the bottom plate portion 41 of the cover, and the side plate portion 42 of the cover. A Cellular phone B Battery housing B1 Bottom surface of battery housing C Battery pack C1 Electrode D Built-in circuit board E Power line

Claims (7)

Conducting a bottom surface and four electrode portions provided on one side surface of the battery pack removably attached to the battery holder of the electronic device is a recess formed of the side surface, and the power supply line of the built-in circuit board of the electronic device, the A contact pin that allows
The contact pin is
A case disposed on one of the four side surfaces of the battery housing;
It consists of a plurality of pin bodies arranged in parallel mounted on the case,
Each of the pin bodies is
An elastic part that is formed by bending a leaf spring material so as to have at least two zigzag folding parts, and is arranged to be able to bend and stretch in a direction along the bottom surface of the battery housing part;
The elastic part is formed on one end side of the elastic part, is provided so as to be exposed outside the case with the bent part as a tip, and a contact part where the tip contacts the electrode part of the battery pack;
It is provided on the other end side of the elastic part, and comprises a connection part connected to the power line of the built-in circuit board,
One side surface on which the case is disposed is one side surface of the battery pack when the battery pack is accommodated in the battery accommodating portion while applying a pressing force from the electrode portion of the battery pack to the tip of the contact portion. And the opposite side,
When a pressing force is applied from the electrode part of the battery pack to the tip of the contact part, the contact part is pushed in an arc in a lateral direction with respect to the bottom surface of the battery housing part, A contact pin characterized by sliding on the surface.   The contact pin according to claim 1, wherein the contact portion is bent in an inverted U shape, and an inner bent portion is provided at a tip portion thereof.   The contact pin according to claim 1, wherein a width of the contact portion is formed narrower than a width of the elastic portion.   The contact pin according to any one of claims 1 to 3, wherein the leaf spring material is bent into an M shape or a W shape. The contact pin according to any one of claims 1 to 4, wherein a terminal made of a metal plate that is insert-molded at the time of resin molding of the case is provided on a bottom surface side of the case. A groove for inserting the pin body is provided on the bottom side of the case,
The pin body is
It is connected to the side of the other end side of the elastic part, and has a mounting part for press-fitting and mounting the pin body to the case by inserting from the groove,
The contact pin according to claim 1, wherein the connection portion is connected to the mounting portion. The contact pin according to claim 1, wherein the electronic device is a mobile phone.

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