JP3282093B2 - Contact terminal structure for portable electronic devices - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a small electronic device such as a cellular phone, and more particularly, to a structure of a contact terminal which contacts a built-in power supply battery.

[0002]

2. Description of the Related Art As is well known, a portable electronic device such as a cellular phone has a built-in replaceable power supply battery, and an electrode plate of the power supply battery and a printed wiring board inside the device are required. In order to electrically connect between them, a contact terminal formed of a bamboo spring is used.

[0003] Figure 6 is an electronic apparatus housing showing a conventional connection structure of a power supply battery B to the printed wiring board A to be incorporated therein, the contact end of the configured contact terminals C ₁ in bamboo shoots spring c1
Power supply battery B to be resiliently contact the electrode plate b1 to is contained in a battery case D ₁ to be molded, the base c2 of the contact terminal C ₁ is "L" one side of the shaped fitting E It is fixed to e1 with solder or the like. Then, through-holes F of the battery case D ₁
Wherein it is located outside the battery case D ₁ through fittings E
Of the other side e2 are projections contact bead e3, these contact bead e3 is brought into contact with the conductive layer a of the printed circuit board A which is placed substantially in parallel with the battery case D _1, contact terminals C ₁ and the connection The power supply battery B is electrically connected to the printed wiring board A via the metal fitting E.

However, according to such a connecting structure, with the use of special fittings E, since the step of fixing the contact terminal C ₁ in the fitting E is required, it becomes the product cost is expensive.

FIG. 7 shows another conventional connection structure.
In this connection structure, the base portion of the contact terminal C ₂ external contact end c3 extending in the longitudinal direction of the contact terminal C ₂ is processed. That is, the contact terminals C ₂ to resiliently contacted the contact end c1 to plate b1 of the battery power source B is incorporated into the battery case D ₂ through the release unit G that forms the bottom wall d1 of the battery case D ₂ , after the same contact terminals C ₂ built, the release unit G is closed by the cover plate H. External contact end c3 of the contact terminals C _2, which is located in the battery case D ₂ outside the battery case D ₂
Is press-contacted to the conductor layer a of the printed wiring board A located outside. However, this connection structure has a connection fitting E
Although it is not necessary to use, since require cover plate H to prevent the escape of the contact terminals C ₂ from the battery case D _2, itself in reducing product cost was limited by the annexed of the cover plate H.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problem of the contact terminal structure of a conventional portable electronic device, and does not require a special connection fitting or a cover plate.
An object of the present invention is to obtain a contact terminal structure of a portable electronic device at a low product cost.

[0007]

In order to achieve this object, the present invention incorporates a battery case forming a battery pocket capable of accommodating a power supply battery inside a housing of a portable electronic device, and includes an end face of the power supply battery. A contact terminal made of a bamboo spring whose contact end is elastically contacted with the electrode plate is disposed at one inner end of the battery case, and the external contact end of the base of the contact terminal is substantially parallel to the battery case. In the contact terminal structure of a portable electronic device electrically connected to a conductor layer of a printed wiring board incorporated in the housing, the external contact end is drawn to the printed wiring board side at the inner end of the battery case. Forming a through-slot, and returning the external contact end to project outside the battery case through the through-slot at a position close to the through-slot on the outer bottom surface of the battery case. Leave molding the locking pin to stop,
The present invention proposes a contact terminal structure of a portable electronic device in which the deformed external contact end locked by the locking pin is pressed against the conductor layer. In the following description of a preferred embodiment of the present invention, the external contact end is bent into a “U” shape from the base of the contact terminal, and one side of the U-shape is connected to the locking pin. A structure is described in which the other side of the U-shape, which is locked and elastic, is pressed against the conductor layer of the printed wiring board.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a portable telephone according to the present invention will be described in detail with reference to FIGS. As can be understood from FIGS. 1 and 2, the casing of the mobile phone is composed of a casing case 2 and a casing cover 3 with a seal rubber 1 interposed therebetween, and is externally provided by the elastic seal rubber 1. Rainwater and the like are prevented from entering.

That is, a printed wiring board 4 on which electronic components (not shown) are mounted is incorporated in the housing of the portable telephone. A battery case 6 capable of accommodating a rectangular power battery 5 having a rectangular shape is integrally formed.

That is, a battery pocket 7 having substantially the same capacity as the power supply battery 5 is formed inside the battery case 6, and the power supply battery 5 used in the battery pocket 7 with the back side of the housing cover 3 opened is provided. The battery pocket 7 can be dropped, and the surface of the battery pocket 7 can be covered with an elongated battery cover 8 formed of resin. A frame-shaped packing groove 9 surrounding the battery pocket 7 is formed on the lower back surface of the housing cover 3, and a part of the packing groove 9 projects from the opening edge of the packing groove 9. The waterproof packing 10 is fixed.

A frame-shaped waterproof rib 8a having a shape corresponding to the waterproof packing 10 is integrally formed on the inner surface of the battery cover 8, and the front end surface of the frame-shaped waterproof rib 8a is pressed against the sealing surface of the waterproof packing 10. By doing so, intrusion of rainwater or the like into the battery pocket 7 is prevented.

FIGS. 3 to 5 show a connection structure between a power supply battery 5 housed in a battery case 6 and a printed wiring board 4 located outside the battery case 6, and an electrode plate 5a of the power supply battery 5. A recess 12 is formed on the inner surface of the end wall 6a of the battery case 6, which is formed by a bamboo spring. The recess 12 is fitted with a base 11a of a pair of contact terminals 11A and 11B. The bottom wall 6b is formed with a through slot 13 located on a plane perpendicular to the length direction of the contact terminals 11A and 11B. Further, the contact end 11b at the tip of each contact terminal 11A, 11B is
Is resiliently contacted with the electrode plate 5a.

At the base of each of the contact terminals 11A and 11B, a "U" -shaped external contact end 11c located in a plane perpendicular to the longitudinal direction of the contact terminals 11A and 11B is bent. Of the battery case 6 protrudes out of the battery case 6 through the corresponding through slot 13. Further, the battery case 6 close to each of the slots.
A pair of small locking pins 14 are integrally formed on the outer bottom surface of the device, and the side 11d of each elastically deformed external contact end 11c is locked to each of these locking pins 14.

An arc-shaped contact portion 11f is formed on a side edge 11e of each of the external contact end portions 11c provided with elasticity of the contact terminals 11A and 11B, and these arc-shaped contact portions 11f are formed on the battery case 6 with respect to the battery case 6. The printed wiring board 4 in a substantially parallel state.

Since the contact terminal structure of the illustrated embodiment has the above-described structure, it can be assembled in the following steps. That is, in order to attach the contact terminals 11A and 11B to the battery case 6, when the bases of the contact terminals 11A and 11B are fitted into the corresponding recesses 12, the contact terminals 11A and 11B are attached.
The external contact end 11c of the battery 11B projects outside the battery case 6 through the through slot 13.

Therefore, the locking pin 14 is bypassed, and the side 11c of the external contact end 11c is slightly lifted.
If the user twists in the clockwise direction and releases the hand, the side edge 11c is prevented from returning by the locking pin 14, so that the external contact end 11c is prevented from coming out into the battery case 6 through the through slot 13. And the contact terminal 11 with respect to the battery case 6
Assembly of A and 11B is completed.

Thereafter, when the housing cover 3 is attached to the housing case 2, the printed circuit board 4 on which the circuit elements are mounted is mounted.
The arc-shaped contact portions 11f of the contact terminals 11A and 11B are pressed against the conductor layer 4a of the contact terminal 11a.
The electrode plate 5a of the power supply battery 5 and the contact terminals 11A, 11
Electrical connection with the B conductor layer 4a can be made automatically.

Although the above embodiment of the present invention has been described with respect to an example in which the present invention is applied to a mobile phone, the present invention can be applied to other portable electronic devices. Needless to explain.

[0019]

As is apparent from the above description, according to the present invention, the electric connection between the power supply battery and the printed wiring board is made only by the contact terminals constituted by the bamboo springs without using any connection fittings or cover plates. Connection can be made and the assembling process can be simplified, so that the production cost can be sufficiently reduced.

[Brief description of the drawings]

FIG. 1 is an overall side view of a mobile phone according to the present invention, partially cut away.

FIG. 2 is an enlarged exploded perspective view of a main part of the mobile phone.

FIG. 3 is an enlarged sectional view of a main part along line 3-3 in FIG. 1;

FIG. 4 is a main part enlarged side view showing a relationship between a contact terminal and a printed wiring board of the mobile phone.

FIG. 5 is a front view showing the relationship between the contact terminals of the mobile phone and the printed wiring board as viewed from the left side of FIG. 4;

FIG. 6 is a side view showing a relationship between a conventional contact terminal and a printed wiring board.

FIG. 7 is a side view of another structure showing a relationship between a conventional contact terminal and a printed wiring board.

[Explanation of symbols]

 Reference Signs List 5 power battery 5a electrode plate 6 battery case 7 battery pocket 11A, 11B contact terminal 11b contact end 11c external contact end 13 through slot 14 locking pin

Claims (2)

(57) [Claims] 1. A bamboo spring having a battery case forming a battery pocket capable of accommodating a power supply battery in a housing of a portable electronic device, wherein a contact end is elastically contacted with an electrode plate on an end face of the power supply battery. A contact terminal comprising: a contact terminal formed at one end of the inside of the battery case; and an external contact end of a base of the contact terminal is electrically connected to a conductor layer of a printed wiring board incorporated in the housing in a state substantially parallel to the battery case. In the contact terminal structure of a portable electronic device to be electrically connected, a through slot is formed at an inner end of the battery case so that the external contact end can be drawn out toward a printed wiring board, and a through-slot is formed on an outer bottom surface of the battery case. At a position close to the through-slot, a locking pin for stopping the return of the external contact end that protrudes to the outside of the battery case through the through-slot is formed,
The contact terminal structure of a portable electronic device, wherein the deformed external contact end locked by the locking pin is pressed against the conductor layer. 2. The external contact end is bent from the base of the contact terminal into a “U” shape, and one side of the U-shaped is locked by the locking pin, and has elasticity. 2. The contact terminal structure for a portable electronic device according to claim 1, wherein the other side of the U-shape is pressed against the conductor layer of the printed wiring board.