JP2011192426A - Structure of battery housing part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a waterproof structure and thinning with a structure of attaching a packing to a body side member fitting a battery lid, by solving a problem that, since a packing is attached to a battery lid, and a battery-holding spring is provided between the battery lid and the battery, in a conventional method, the battery gets thicker by a portion of the spring. <P>SOLUTION: A printed wiring board 3 is arranged at a body side member 2, a battery housing part 4 is formed in penetration into the body side member 2, and a battery lid 5 is provided attached in free detachment to the battery housing part 4 on a face opposite to the printed wiring board 3 of the body side member 2. A circular elastic packing 10 for sealing a gap between the body side member 2 and the battery lid 5 is provided at a peripheral edge part of the battery housing part 4, a leaf spring 9 for an electrode facing the battery housing part 4 from a through-hole 3A for holding the battery 6 is attached to the printed wiring board 3, the packing 10 is pressed with the battery 6 housed in the battery housing part 4 and with the battery lid attached to the body side member 2, and at the same time, the battery 6 is in a state pressed and held by the leaf spring 9 for the electrode while in a state invading into the through-hole 3A. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a structure of a battery housing part in an electronic device using a button type battery.

When a button-type battery is used in an electronic device, the battery is attached to the electronic device in a state of being stored in a battery storage portion formed in the electronic device. There is a battery housing part having a waterproof structure by keeping the space watertight with a packing (see Patent Document 1).

Japanese Patent Laid-Open No. 11-273648

In the first place, the thickness of the packing used between such an electronic device and the battery lid is limited so that the thickness of the entire electronic device does not increase at this portion. Since the thing of patent document 1 is the state attached to the back side peripheral edge of a battery lid in the state where the base of the packing was inserted in the outward groove formed in the back side peripheral edge of a battery lid, packing is considerably While pulling, the base of the packing is inserted into the outward groove of the battery cover and then bonded to the peripheral edge of the back of the battery cover. Therefore, the packing must have sufficient extensibility and resilience. In that case, since the thickness of the packing is limited as described above, there is a problem that the material is specified and the troublesomeness of the attaching operation is accompanied.

Further, in Patent Document 1, in order to engage the bayonet of the battery lid 6 with the back lid 8, the battery lid 6
A battery pressing spring 5 is provided between the battery 4 and the battery 4. For this reason, the thickness from the circuit unit 1 to the battery cover 6 is increased. For example, when it is desired to reduce the thickness as in a card type electrical device,
There is a problem that this becomes a bottleneck.

In view of these points, the present invention has a structure in which a packing is attached to the electronic device main body side to which the battery lid is attached, and a battery holding spring 5 as in Patent Document 1 is provided by using a characteristic battery support structure. The technology which solves a problem by the method which is not provided is provided.

In the first invention, a printed wiring board is disposed on a main body side member of an electronic device, and a battery storage portion that stores a button-type battery used as a power source of the printed wiring board is formed through the main body side member. A battery lid that is detachably attached to the surface of the main body side member opposite to the printed wiring board so as to cover the battery housing portion, and has an annular shape that seals between the main body side member and the battery lid. An elastic packing is attached to the peripheral edge of the battery housing part, and a through hole is formed in the printed wiring board corresponding to the battery housing part, facing the battery housing part from the through hole and housed in the battery housing part. An electrode leaf spring for holding the battery is attached to the printed wiring board, the battery is housed in the battery housing portion, and the battery lid is attached to the body side member. Together with the packing is pressed, the battery is characterized in that the pressing and holding state by the electrode plate spring in a state that has entered into the through-hole.

According to a second aspect of the present invention, in the first aspect, the electrode leaf spring forms a plurality of protruding elastic portions from the annular portion toward the inner central portion of the annular portion, and extends outward from the annular portion. But,
It is attached to the printed wiring board with solder, the annular portion and the elastic portion face the through hole, and the battery stored in the battery storage portion is held by the elastic portion.

As described above, the packing is pressed with the battery lid attached to the battery housing, and the electrode leaf spring is bent and pressed in the through hole of the printed wiring board via the battery. A waterproof structure between the side member and the battery lid is achieved, and the thickness from the printed wiring board to the battery lid can be reduced, which is suitable for thinning.

It is the perspective view seen from the back side (battery cover side) of the electric equipment which concerns on this invention. It is a disassembled perspective view of the main body side member and battery cover seen from the front side of the battery accommodating part of the electric equipment which concerns on this invention. It is a back side perspective view of the main body side member of the battery accommodating part of the electric equipment which concerns on this invention. It is the figure seen from the leaf | plate spring side which supports a battery in the battery accommodating part which concerns on this invention. FIG. 5 is a cross-sectional view taken along the line AA of FIG. 4 to show the configuration of the battery storage unit according to the present invention. It is a perspective view of the packing which concerns on this invention. It is a perspective view which shows the relationship between the attachment leg part of the packing which concerns on this invention, and an insertion groove part. It is a perspective view which shows the attachment state of the packing which concerns on this invention.

According to the present invention, a printed wiring board is disposed on a main body side member of an electronic device, and a battery storage portion in which a button type battery used as a power source of the printed wiring board is stored is formed through the main body side member. An annular elastic member that includes a battery lid that is detachably attached to the surface of the main body side member opposite to the printed wiring board so as to cover the battery housing portion, and seals between the main body side member and the battery lid. A packing is attached to a peripheral portion of the battery housing portion, a through hole is formed in the printed wiring board corresponding to the battery housing portion, and the battery housing portion faces the battery housing portion from the through hole and is housed in the battery housing portion. An electrode leaf spring for holding a battery is attached to the printed wiring board, the battery is housed in the battery housing portion, and the battery lid is attached to the body side member. With serial packing is pressed, is characterized in that the pressing and holding state by the electrode plate spring in a state in which the battery is penetrated into the through-hole.

First, an electronic apparatus 1 according to the present invention will be described with reference to the drawings. The electronic device 1 has a card type such as a non-contact IC card or a portable terminal device that exchanges information with other devices wirelessly. In order to explain that the effect of the present invention can be sufficiently exerted in a thin electronic device 1 such as a card, the case where the electronic device 1 of the embodiment shown in the figure is in the form of a card such as a non-contact IC card will be described. .

The electronic device 1 is attached with electronic components along a surface on one side of the exterior case 2 constituting the main body side member 2 that is molded with a synthetic resin so as to form a rectangular shape that is not easily deformed to form a predetermined electrical wiring. The printed wiring board 3 is disposed and penetrates through the outer case 2 so that the battery housing portion 4 is formed therethrough. As will be described later, in a state where the battery 6 is housed in the battery housing portion 4, the battery lid 5 made of synthetic resin is attached to the battery housing portion 4 from the other surface of the outer case 2.

The printed wiring board 3 is covered with a cover 7 whose peripheral portion is bonded to the step portion of the outer case 2 and whose front side is bonded to the step portion of the outer case 2. The electrical connection between the battery 6 and the printed wiring board 3 is such that the battery 6 is housed in the battery housing portion 4, and the positive electrode side of the battery 6 is a conductive electrode leaf spring 8 attached to the printed wiring board 3. The negative electrode side of the battery 6 is achieved by contacting the conductive electrode leaf spring 9 attached to the printed wiring board 3 so as to be interposed between the battery 6 and the printed wiring board 3. .

A through hole 3 </ b> A is formed in the printed wiring board 3 corresponding to the battery housing 4. As shown in FIGS. 4 and 5, the electrode leaf spring 8 and the electrode leaf spring 9 are in the shape of a letter C in contact with the peripheral side wall on the positive electrode side of the battery 6. 8A has elasticity, its base 8B
Is attached to the positive electrode circuit portion by solder through the printed wiring board 3, and the C-shaped portion 8 A of the electrode leaf spring 8 faces the peripheral side portion of the battery housing portion 4.

The electrode leaf spring 9 is attached to the printed wiring board 3 so as to face the through hole 3A from the side opposite to the battery lid 5 of the printed wiring board 3. Specifically, the electrode leaf spring 9 forms a plurality (three in the drawing) of elastic portions 9B protruding from the annular portion 9A toward the inner center of the annular portion 9A. Two base portions 9C extending outward from the annular portion 9A at substantially symmetrical positions are disposed on the surface of the printed wiring board 3 opposite to the battery lid 5 and the tip thereof penetrates the printed wiring board 3. Then, it is attached to the plus electrode circuit portion with solder. By this attachment, the annular portion 9A and the elastic portion 9B are in a state of facing the battery housing portion 4 from the through hole 3A in a state of entering the through hole 3A. Thus, in a state where the battery 6 is stored in the battery storage portion 4, the flat portion on the negative electrode side of the battery 6 enters the through-hole 3A and contacts the elastic portion 9B to support the battery 6.

A gap between the exterior case 2 that is the main body side member 2 of the electronic device 1 and the battery lid 5 is sealed by a circular annular packing 10, and this portion has a waterproof structure. Packing 1
0 is a product such as silicon rubber having flexibility and elasticity, and a circular seal portion 11 which is a preferable annular shape and a plurality of mounting legs 12 extending downward from the seal portion 11 are spaced apart from each other. Is formed.

A flange 13 is formed around the entire periphery of the battery housing portion 4.
The upper surface (the back side surface of the outer case 2) forms the arrangement part 14 of the packing 10, and the arrangement part 1
4, the seal part 11 is arranged. The arrangement portion 14 is formed by a circular groove 14 </ b> A for accommodating the lower portion of the seal portion 11.

In the packing 10, the seal portion 11 forms a circumferential surface 11 </ b> A whose contact surface with the battery lid 5 is pointed toward the battery lid 5, and the mounting leg portion 12 extends downward from the seal portion 11.
At the tip, a collar portion 12A for retaining is formed. Further, the flange 13 is formed with an insertion groove 15 that is long in a direction communicating with the groove 14 </ b> A of the arrangement portion 14 from the battery storage portion 4 and into which the attachment leg portion 12 is inserted.

In the present invention, the mounting leg portion 12 has a non-circular shape, and the groove width of the insertion groove 15 is configured to fit with the non-circular shape portion of the mounting leg portion 12.

In addition, as a first form in which the mounting leg 12 has a non-circular shape, the mounting leg 12 is
As shown in FIG. 8, it is formed in two upper and lower stages, and has a long horizontally-shaped leg portion 12X along the inside of the seal portion 11 so that the side close to the seal portion 11 intersects the radial direction Y of the seal portion 11, The side close to the portion 12A forms a circular leg portion 12Y. The shape of the insertion groove 15 is also formed in two upper and lower stages so as to match the mounting leg 12, and the first stage groove 15A formed in a width T1 in which the long side of the horizontally long leg 12X fits, A second-stage groove 15B formed to have a width that fits the shape leg portion 12Y is formed.

In the first form in which the mounting leg 12 has a non-circular shape, the seal 10 fits into the circular groove 14A as shown in FIG. Is attached to the flange 13 such that the long side of the horizontally long leg 12X fits into the first-stage groove 15A and the circular leg 12Y fits into the second-stage groove 15B.

There are various configurations in which the battery lid 5 is detachably attached to the battery housing portion 4. In the present invention, the battery lid 5 and the battery housing portion are provided so that the battery lid 5 is firmly fixed to the battery housing portion 4. 4
A plurality of lid-side locking projections 16 and body-side member locking projections 17 are provided on the peripheral edge of the battery lid 5 so that the battery lid 5 is locked with each other as the battery lid 5 rotates in the forward direction and is detached when the battery lid 5 rotates in the reverse direction. , Each is formed at intervals. In order to allow the battery cover 5 to be stably attached to the outer case 2, in the illustrated example, the cover-side locking projection 16 is formed in a radial direction from a circumferential protrusion 5 </ b> P formed with a diameter D <b> 1 on the back side of the battery cover 5. The main body side member locking projections 17 are formed on the flanges 13 on the periphery of the battery housing part 4 of the outer case 2, and the lid side locking projections 16 and the main body side member locking projections 17 are respectively It is formed with an interval of 120 degrees.

For this reason, the lid-side locking projections 16 formed on the battery lid 5 at a pitch of 120 degrees are made to coincide with the guide notches 18 formed on the peripheral edge of the battery housing portion 4 at a pitch of 120 degrees, and from this state, the battery lid 5
By placing a coin in the arc-shaped groove 5A formed on the surface of the battery and rotating the battery lid 5 in the forward direction, the lid-side locking projection 16 is locked to the main body-side member locking projection 17 so that the battery lid 5 Is attached to the outer case 2. Further, from this state, the battery lid 5 can be removed from the outer case 2 in a state where the battery lid 5 is rotated in the reverse direction and the lid-side locking projection 16 is detached from the main body-side member locking projection 17. .

In such a configuration, the packing 10 is attached to the placement portion 14 in a state where the printed wiring board 3 is attached to the exterior case 2. In this attachment, one of the attachment leg portions 12 is inserted into one of the insertion grooves 15, and the portion of the seal portion 11 in the vicinity thereof is accommodated in the circular groove 14 </ b> A, so that the remaining attachment leg portions are sequentially provided. 12 is inserted into the insertion groove 15, and the portion of the seal portion 11 in the vicinity thereof is housed in the circular groove 14 </ b> A, whereby all the mounting leg portions 12 are inserted into the insertion groove 15, and the entire seal portion 11 is circular. It is stored in the shaped groove 14A, and the attachment of the packing 10 is completed.

In this mounting operation, as described above, the mounting leg portion 12 has a non-circular shape, and the groove width T1 of the insertion groove 15 is configured to fit into the non-circular shape portion of the mounting leg portion 12. In the first embodiment, as shown in FIG. 8, in the packing 10, the seal portion 11 fits into the circular groove 14A, and the attachment leg portion 12 has the long side of the horizontally long leg portion 12X at the first step. It is attached to the flange 13 so that it fits into the groove width T1 of the groove 15A and the circular leg 12Y fits into the second-stage groove 15B. Accordingly, the mounting leg 12 is not inserted in a state of being twisted into the insertion groove 15, and the seal part 11 is not expanded or the seal part 11 is not twisted between the mounting legs 12. The seal portion 11 is housed in the circular groove 14A in a normal state.

By such attachment, the seal portion 11 has a groove 14 with a circular circumferential surface 11A having a circular shape.
In a state exposed from A, the lower portion is accommodated in the circular groove 14A. And
The flange portion 12A comes into contact with the lower surface of the flange 13 to prevent it from coming off, and the seal portion 11 is stably held in the circular groove 14A.

With the packing 10 attached in this manner, the battery 6 is accommodated in the battery accommodating portion 4 from the back side of the exterior case 2 that is the main body side member 2, whereby the positive electrode of the battery 6 is elastic of the electrode leaf spring 8. The negative electrode of the battery 6 comes into contact with the elastic part 9B of the electrode leaf spring 9, and the battery 6 faces the battery housing part 4 from the through hole 3A as shown in FIG. In this way, it is supported by the elastic portion 9B of the conductive electrode leaf spring 9 attached to the substrate 3. Then, the battery lid 5 is made to face the battery housing portion 4 so that the lid-side locking projection 16 of the battery lid 5 is aligned with the guide cutout 18 of the battery housing portion 4. At this time, the concave portion with the diameter D1 surrounded by the arc-shaped convex portion 5P formed on the back side of the battery lid 5 is in a state where the portion with the maximum diameter D2 of the battery 6 is accommodated. From that state, the circumferential portion of the coin is applied to the arc-shaped groove 5A formed on the surface of the battery lid 5, and the battery lid 5 is rotated in the forward direction. 1
The lid side locking projection 16 is locked to the main body side member locking projection 17 while being in contact with 1A, and the battery lid 5 is attached to the main body side member 2 so as to cover the battery housing portion 4.

With the battery lid 5 attached to the main body side member 2 in this way, the seal portion 11 is compressed on the back surface of the battery lid 5, and the entire circumference of the seal portion 11 is pressed to adhere to the back surface of the battery lid 5. , Waterproof structure. At the same time, as the battery lid 5 is attached to the main body side member 2, the battery 6
The flat portion on the negative electrode side enters the through-hole 3A, contacts the elastic portion 9B in the through-hole 3A, and the battery 6 is supported. The electrode leaf spring 9 is pressed while being bent in the through hole 3 </ b> A of the printed wiring board 3 via the battery 6, and the battery 6 is held between the battery lid 5 and the electrode leaf spring 9.

Thus, by attaching the battery cover 5, the contact between the battery 6 and the electrode leaf spring 9 is maintained by the elasticity of the electrode leaf spring 9, and the electrode leaf spring 9 attaches the battery 6 to the battery housing 4. Hold the role. Further, by attaching the battery lid 5, the battery 6 pushes the electrode leaf spring 9,
As shown in FIG. 5, when the elastic portion 9B of the electrode leaf spring 9 bends in the through hole 3A, the base 8B is bent in the through hole 3A. This acts as a relief area for bending of the electrode plate spring 9 when the electrode plate spring 9 is pushed.

As described above, since the packing 10 is pressed while the battery cover 5 is attached to the battery housing portion 4 and the electrode leaf spring 9 is bent through the through-hole 3A via the battery 6,
A waterproof structure between the main body side member 2 and the battery lid 5 is achieved, and the thickness from the printed wiring board 3 to the battery lid 5 can be reduced.

In the illustrated example, the battery 6 has a thickness of about 1.6 mm, the battery lid 5 has a thickness t2 of about 0.5 mm, and includes a circumferential convex portion 5P around the concave portion having a diameter D1 formed on the back side of the battery lid 5. The thickness is about 1.8
mm. Further, the thickness of the seal portion 11 of the packing 10 is approximately 1 mm, the depth of the groove 14A is approximately 0.6 mm, and the substantially half portion including the sharp circumferential surface 11A of the seal portion 11 is the groove 1.
The seal portion 11 is housed in the groove 14A while being exposed from 4A.

In addition, when the battery 6 is replaced, the battery lid 5 is rotated in the reverse direction from this state, and the battery lid 5 is in a state where the lid side locking projection 16 is detached from the main body side member locking projection 17. Can be removed from the outer case 2, and the battery 6 can be removed from the battery housing 4.

As described above, the sealing device for the battery housing portion according to the present invention eliminates the need for applying an adhesive to the packing arrangement portion 14 by attaching the packing without bonding.
A process for ensuring the drying time of the adhesive at the time of assembly is also unnecessary.

Further, if the mounting leg 12 has a circular cross-sectional shape, the mounting leg 12 may be twisted when it is rubbed by the insertion groove 15 in the process of fitting the mounting legs 12 into the insertion grooves 15 one after another. Occurs, a part of the circular seal portion 11 between the mounting legs 12 is loosened or pulled,
A part of the seal portion 11 is not disposed at the normal position of the circular groove 14A. However, in the present invention, the mounting leg portion 12 has a non-circular shape, and the groove width T1 of the insertion groove 15 is configured to fit the non-circular shape portion of the mounting leg portion 12. The direction of insertion into the mounting leg portion 12 is determined, and there is no such twist, and the seal portion 11 is placed in the normal position of the circular groove 14A.

The structure of the battery storage unit according to the present invention is not limited to the configuration shown in the above embodiment, but can be applied to various forms, and includes various forms within the technical scope of the present invention. .

DESCRIPTION OF SYMBOLS 1 ... Electronic device 2 ... Exterior case which is main body side member 3 ... Printed wiring board 3A ...... Through-hole 4 ... Battery storage part 5 ... ··· Battery cover 6 ··· Battery 7 ··· Cover 8 ··· Plate spring for positive electrode 8A · · · C-shaped part 9 · · · Negative electrode Plate spring 9A ... Ring portion 9B ... Elastic portion 9C ... Base 10 ... Packing 11 ... Seal 11A ... Sharp circumferential surface 12 ... Attaching leg 12A ... collar 13 ... flange 14 ... arrangement part 14A ... circular groove 15 ... insertion groove 16 ... lid side locking projection 17 ... ..Main body side member locking projections

Claims (2)

A printed wiring board is disposed on a main body side member of an electronic device, and a battery storage portion that stores a button type battery used as a power source of the printed wiring board is formed through the main body side member, and the printed wiring board and Is provided with a battery lid that is detachably attached to the surface of the main body side member on the opposite side so as to cover the battery housing portion, and an annular elastic packing that seals between the main body side member and the battery lid is the battery. A through hole is formed in the printed wiring board corresponding to the battery housing portion, and is attached to the peripheral portion of the housing portion, and faces the battery housing portion from the through hole to hold the battery housed in the battery housing portion. An electrode leaf spring is attached to the printed wiring board, the battery is accommodated in the battery accommodating portion, and the battery lid is attached to the body side member. Structure of the battery housing part but with is pressed, the battery is characterized in that the pressing and holding state by the electrode plate spring in a state that has entered into the through-hole. The electrode leaf spring is formed with a plurality of elastic portions protruding from the annular portion toward the inner central portion, and a base portion extending outward from the annular portion is attached to the printed wiring board with solder, 2. The structure of a battery housing part according to claim 1, wherein the annular part and the elastic part face the through hole, and the battery housed in the battery housing part is held by the elastic part.

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