JPH08185843A - Power supply switch structure of small remote control device - Google Patents

Abstract

PURPOSE: To provide power supply switch structure of a small remote control device capable of decreasing the occupation space on the surface of a printed circuit board ensured for a power supply switch and a button battery. CONSTITUTION: In a small remote control device in which a printed circuit board 2 is assembled in a housing 1, and a button battery 3 is set in a battery holder 6 fixed on the surface of the printed circuit board 2, a conductive rubber cup 8 whose flange 8b is electrically connected to a conductor 2b of the printed circuit board 2 is covered to the ring-shaped battery holder 6. A bottom 8a of the conductive rubber cup 8 is exposed outwardly from a battery part hole 5 formed in the housing 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small remote controller for a keyless entry system of an automobile, for example, and more particularly to a power switch section structure of the small remote controller.

[0002]

2. Description of the Related Art As is well known, in a keyless entry system for an automobile, a card type remote controller as shown in FIG. 4 is used. That is, this small remote controller has a printed wiring board 2A in which various circuit elements are mounted inside an enclosure case 1A formed in a flat box shape, and the surface of the printed wiring board 2A is
A button battery 3A such as a lithium battery serving as a power source and a power switch 4A operated by a fingertip are arranged, and a small remote controller is operated by pressing the power switch 4A.

[0003]

However, according to the structure of such a conventional small remote controller, a space for incorporating the power switch 4A and the button battery 3A on the surface of the printed wiring board 2A which is required to be small in size. Must be separately secured, and the space for incorporating the circuit elements to be assembled on the printed wiring board 2A is reduced, which is a problem in downsizing the small remote controller.

An object of the present invention is to reduce the space occupied on the surface of the printed wiring board, which is reserved for the power switch and the button battery, in consideration of the structural problems of the conventional small remote controller as described above. To get the power switch structure of a small remote control that can be.

[0005]

In order to achieve this object, the present invention incorporates a printed wiring board in an outer case and drops a button battery inside a battery holder fixed to the surface of the printed wiring board. In a small remote controller to be inserted, a ring-shaped battery holder is capped with a conductive rubber cup whose flange is electrically connected to the conductor of the printed wiring board, and the bottom of the conductive rubber cup is formed through a battery hole formed in the outer case. It is proposed to be exposed to.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the embodiments of the present invention will be described below with reference to FIGS. 1 to 3 show a small remote controller for an automobile keyless entry system to which the present invention is applied. The small remote controller is provided with an outer case 1 formed in a flat box shape, and inside the outer case 1. The structure is the same as the conventional one in that the printed wiring board 2 on which various circuit elements and the like are mounted is incorporated.

That is, the outer case 1 which is injection-molded has a surface case 1a and a bottom case 1 which are formed to have substantially equal sizes and shapes.
Although it consists of b, one side corner of this surface case 1a is
A battery portion hole 5 having a diameter slightly larger than the outer diameter of the button battery 3 described later is formed.

A ring-shaped resin-made mounting piece 6a of the battery holder 6 is fixed by a pair of rivets 7 on the surface of the printed wiring board 2 corresponding to the battery hole 5 described above. A button battery 3 composed of, for example, a lithium battery is dropped inside with the positive electrode facing down, and the positive electrode of the button battery 3 contacts the positive electrode conductor 2a on the surface of the printed wiring board 2. .

The bottom wall 8a of the battery holder 6 is covered with a conductive rubber cup 8 exposed to the outside through the battery hole 5. That is, the conductive rubber cup 8 is formed into a bottomed cup shape having a conductive collar 8b.
A notch 9 is formed in the collar 8b at a position corresponding to the mounting piece 6a. Therefore, as shown in FIG. 3, the surface of the brim 8b of the conductive rubber cup 8 is brought into contact with the negative pole conductor 2b on the surface of the printed wiring board 2 by the ring-shaped pressing portion 1c of the surface case 1a in the assembled state. It will be.

Since the small remote controller according to the illustrated embodiment has the above-described structure, the button battery 3 is covered with the conductive rubber cup 8, so that the printed wiring board 2 required for the power switch is replaced. It takes up no space on the surface. Further, in order to use the same small remote controller, as shown in FIG. 3, a conductive rubber cup 8 serving as a power switch is used.
When the bottom wall portion 8a of is deformed with a fingertip as shown by an imaginary line,
Since the minus electrode of the button battery 3 and the minus electrode conductor 2b of the printed wiring board 2 are brought into conduction via the conductive rubber cup 8, the small remote controller can be operated.

Although the small remote controller of the keyless entry system has been illustrated in the above embodiment, it is obvious that the present invention can be applied to a remote controller for a pager for stopping a ring tone.

[0012]

As is apparent from the above description, according to the present invention, since the conductive rubber cup covering the battery holder is used as the power switch, the space occupied by the power switch and the button battery with respect to the printed wiring board is reduced, A small remote controller can be realized by improving the mounting density of circuit elements on a printed wiring board.

[Brief description of drawings]

FIG. 1 is a partial cutaway perspective view of a small remote controller according to the present invention.

FIG. 2 is a partially cutaway exploded perspective view of the same small remote controller.

FIG. 3 is an enlarged cross-sectional view of a main part of a power switch section of the same small remote controller.

FIG. 4 is a partial cutaway perspective view of a conventional small remote controller.

[Explanation of symbols]

 1 Enclosure Case 2 Printed Wiring Board 2a Positive Electrode Conductor 2b Negative Electrode Conductor 3 Button Battery 5 Battery Port Hole 6 Battery Holder 8 Conductive Rubber Cup 8a Bottom Wall 8b Collar

Claims (1)

[Claims] 1. In a small remote controller in which a printed wiring board is built in an outer case and a button battery is dropped inside a battery holder fixed to the surface of the printed wiring board, a collar is electrically connected to a conductor of the printed wiring board. The power switch structure of the small remote controller, characterized in that the conductive rubber cup is covered with a ring-shaped battery holder, and the bottom surface of the conductive rubber cup is exposed to the outside through a battery hole formed in the outer case. .