JPH06152492A - Cordless telephone set - Google Patents

Abstract

PURPOSE:To provide a cordless telephone set which is hardly destroyed even by any impulse such as dropping. CONSTITUTION:Plural projecting parts composed of bosses 1b for positioning and ribs 1c for positioning shorter than these bosses 1b for positioning are integrally formed on an upper case 1. The plural bosses 1b for positioning are respectively smoothly fitted to plural fitting holes on a printed circuit board 3. The ribs 1c for positioning the printed circuit board 3 in the board thickness- wise direction. Concerning plural bosses 1a for positioning on the upper case 1, the thickness is thin, elastic structure is provided, they are contacted to the terminal parts of the printed circuit board 3 with pressure, and the printed circuit board 3 is supported in the surface direction with freedom. Plural holes 2b for stopper of plural bosses 2a for stopper on a lower case 2 are respectively inserted with the bosses 1b for positioning so that the printed circuit board 3 can not be slipped out of the bosses 1b for positioning.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upper case and a lower case constituting an outer cover of a cordless telephone, and a printed circuit board provided in the outer cover for mounting electronic circuits required for cordless telephone communication. And a support structure for the printed circuit board.

[0002]

2. Description of the Related Art FIGS. 5A and 5B are views showing a conventional cordless telephone of this type, FIG. 5A is a vertical sectional view, and FIG. 5B is a front view with a lower case of FIG. is there. Further, FIG. 6 is an enlarged view of a main part of FIG.

The upper case 1X and the lower case 2X constitute an outer cover of the cordless telephone B, and the printed circuit board 3X on which the electronic component 4X is mounted is screwed to a plurality of protrusions 11X integrally provided on the upper case 1X. Fixed at 10X. And as the size of cordless phones progresses,
As a screw for fixing the printed circuit board, a screw with a large diameter cannot be used, and many small screws with a weak fastening force must be used.

[0004]

However, in the above-mentioned prior art, since the printed circuit boards are attached to the upper case without any freedom, the case is accidentally dropped or bumped against a pillar or the like. There is a problem in that the shock received by is transmitted to the printed circuit board with almost no attenuation and important electronic parts are destroyed.

Further, since many small screws are used, it takes time to assemble, it is easy to forget to attach the screws, and it takes time to inspect the assembly.

The present invention has been made in view of the above problems of the prior art, and it is an object of the present invention to provide a cordless telephone in which a printed circuit board can be easily attached and is not easily broken even when it is dropped or otherwise impacted. To aim.

[0007]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides an upper case and a lower case forming an outer cover of a cordless telephone, and an electronic circuit necessary for cordless telephone communication. In a cordless telephone including a printed circuit board provided in an outer cover, a plurality of first protrusions provided on the upper case or the lower case for supporting the printed circuit board, and the printed circuit board. A plurality of holes provided loosely fitted to the plurality of first protrusions, respectively, and the printed circuit board sandwiched between the plurality of first protrusions facing the first protrusion provided in the lower case or the upper case. A plurality of second protrusions for supporting the printed circuit board, and a support body provided on the exterior cover and having an elastic structure for press-contacting and supporting the periphery of the printed circuit board. The one in which the features.

The support having the elastic structure is interposed between the upper case and the lower case and has an endless structure.

[0009]

In the invention according to claim 1 configured as described above, the printed circuit board is sandwiched and supported by the plurality of first protrusions and the second protrusions, which is the same as the conventional one. Do not use screws to secure the printed circuit board. Also,
Since the printed circuit board is supported by the elastic support, even if a shock is applied to the outer cover, the shock is absorbed by the support and is not transmitted to the printed circuit board.

According to the second aspect of the invention, in addition to the above operation, the space between the upper cover and the lower cover is sealed.

[0011]

Embodiments of the present invention will now be described with reference to the drawings.

(First Embodiment) FIG. 1 is a longitudinal sectional view of a first embodiment of a cordless telephone according to the present invention, and FIG. 2 is shown in FIG.
FIG.

As shown in FIGS. 1 and 2, this cordless telephone A has an outer cover composed of an upper case 1 and a lower case 2, and the upper case 1 has an antenna 4, a speaker 6, a microphone 7 and an operation. It has a structure in which most parts of the telephone, such as the button 8, are mounted.

The upper case 1 is integrally formed with a plurality of first protrusions each including a positioning boss 1b and a positioning rib 1c shorter than the positioning boss 1b. The printed circuit board 3 is for mounting an electronic circuit including a plurality of electronic components 3a, 3b, 3c, etc., which is necessary for cordless telephone communication.
There are formed a plurality of mounting holes 3d for mounting on.
The positioning bosses 1b of the plurality of first protrusions of the upper case 1 are fitted into the plurality of mounting holes 3d, respectively. The diameter D of the mounting hole 3d of the printed circuit board 3 is
The diameter is larger than the diameter d of the positioning boss 1b of the upper case 1, and the structure is such that there is a gap between the mounting hole 3d and the positioning boss 1b. The positioning rib 1c is for positioning the printed circuit board 3 in the plate thickness direction.
Further, the plurality of positioning bosses 1a as the support body are
It is formed integrally with the upper case 1 at a position where it comes into pressure contact with the end of the printed circuit board 3 in the surface direction. The plurality of positioning bosses 1a are for positioning the printed circuit board 3 in its surface direction, have a small thickness and have an elastic structure, and support the printed circuit board 3 in its surface direction with a degree of freedom. There is.

The lower case 2 is fitted with the upper case 3 to form an exterior cover, and the lower case 2 has a retaining boss 2a as a second protrusion having a retaining hole 2b. Are integrally provided. The positioning bosses 1b of the upper case 1 are inserted into the retaining holes 2b of the plurality of retaining bosses 2a, respectively, and the plurality of retaining bosses 2a together with the positioning bosses 1b of the upper case 1 form a printed circuit board. 3 is sandwiched. With this structure, the printed circuit board 3 is prevented from coming off from the positioning boss 1b of the upper case 1.

When assembling this cordless telephone,
Do in the following order: First, the antenna 4, the speaker 6, the microphone 7, the operation button 8 and the like are attached to the upper case 1. After that, the plurality of positioning bosses 1b of the upper case 1 are inserted into the plurality of mounting holes 3d of the printed circuit board 3 to support the printed circuit board 3 on the plurality of positioning bosses 1b and the plurality of positioning bosses 1a. Then, the plurality of positioning bosses 1b are inserted into the plurality of retaining holes 2b of the lower case 2, respectively. Then, the upper case 1 is fitted into the lower case 2 and fastened with screws (not shown). Finally, battery 5
And when the battery lid 9 is sequentially attached to the upper case 1,
Assembly is complete.

In the present embodiment configured as described above, the printed circuit board 3 on which the electronic components 3a, 3b, 3c are mounted is
Since the positioning boss 1a is supported by a plurality of positioning bosses 1a having an elastic structure, when the cordless telephone is accidentally dropped or hit against a pillar or the like, the positioning boss 1a is deformed and the impact is generated by the positioning boss 1a. Be absorbed,
The electronic components 3a, 3b, 3c are less likely to break. Further, since the screw is not used to fix the printed circuit board 3, the assembling of the telephone becomes easy and the reliability is improved.

In the above embodiment, a plurality of positioning bosses 1 are used.
Although a has an elastic structure by reducing its thickness, it is not limited to this, and a plurality of positioning bosses 1a are formed of an elastic material and molded separately from the upper case 1. May be.

(Second Embodiment) FIG. 3 is a longitudinal sectional view of a second embodiment of the cordless telephone according to the present invention, and FIG. 4 is shown in FIG.
FIG.

In this embodiment, a plurality of positioning bosses 1a (see FIGS. 1 and 2) are not used as a support for supporting the printed circuit board 3 between the upper case 1 and the lower case 2. The waterproof packing 12 is interposed and has an endless structure. More specifically, grooves 10 and 11 are formed in the fitting portions of the upper case 1 and the lower case 2, respectively, and the waterproof packing 12 is sandwiched between the grooves 10 and 11. The waterproof packing 12 is made of an elastic material such as silicon rubber, and has an upper case 1 and a lower case 2.
Water and the like are prevented from intruding from the fitting portion with and the printed circuit board 3 is also positioned in the surface direction by pressing and supporting the entire circumference of the printed circuit board 3 in the surface direction. The other structure is the same as that of the first embodiment.

When assembling this cordless telephone,
Do in the following order: First, the antenna 4, the speaker 6, the microphone 7, the operation button 8 and the like are attached to the upper case 1. After that, the waterproof packing 12 is attached to the upper case 1, and the upper case 1 is attached to the plurality of mounting holes 3d of the printed circuit board 3.
The plurality of positioning bosses 1b are respectively inserted to support the printed circuit board 3 on the plurality of positioning bosses 1b and the waterproof packing 12. Then, the plurality of positioning bosses 1b are inserted into the plurality of retaining holes 2b of the lower case 2, respectively. Then, the upper case 1 is fitted into the lower case 2 and fastened with screws (not shown). At this time, the waterproof packing 12 is sandwiched between the upper case 1 and the lower case 2, and there is no gap between the upper case 1 and the lower case 2, so that the waterproof effect can be obtained. Finally, the battery 5 and the battery lid 9 are sequentially attached to the upper case 1 to complete the assembly.

In the present embodiment configured as described above, the printed circuit board 3 on which the electronic components 3a, 3b, 3c are mounted is
Since the waterproof packing 12 is supported by the elastic body, when the cordless telephone is accidentally dropped or hit against a pillar or the like, the waterproof packing 12 is deformed and the shock is absorbed by the waterproof packing 12, so that the electronic Parts 3a, 3b, 3
c becomes hard to break. Further, since the screw is not used to fix the printed circuit board 3, the assembling of the telephone becomes easy and the reliability is improved. Furthermore, the waterproof packing 12 can prevent water or the like from entering the phone.

[0023]

Since the present invention is configured as described above, it has the following effects.

In the cordless telephone according to the present invention, the printed board on which the electronic parts are mounted is supported by the support having an elastic structure, so that the cordless telephone is accidentally dropped or bumped against a pillar or the like. However, since the impact is absorbed by the support, the electronic component is less likely to break. Further, since screws are not used to fix the printed circuit board, the cordless telephone can be easily assembled and the reliability is improved. In addition to the above effects, the invention according to claim 2 can prevent entry of water or the like into the telephone by the support.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a first embodiment of a cordless telephone of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a vertical sectional view of a second embodiment of the cordless telephone of the present invention.

FIG. 4 is an enlarged view of a main part of FIG.

FIG. 5 is a diagram showing a conventional cordless telephone,
(A) is a vertical cross-sectional view, (b) is a front view in a state where the lower case of (a) is removed.

FIG. 6 is an enlarged view of a main part of FIG.

[Explanation of symbols]

 A cordless telephone 1 upper case 1a positioning boss 1b positioning boss 1c positioning rib 2 lower case 2a retaining boss 2b retaining hole 3 printed board 3a, 3b, 3c electronic component 3d mounting hole 4 antenna 5 battery 6 Speaker 7 Microphone 8 Operation Button 9 Battery Lid 10, 11 Groove 12 Waterproof Packing φD Diameter of Mounting Hole 3d φd Diameter of Locking Hole 2b

Claims (2)

[Claims] 1. A cordless telephone including an upper case and a lower case that form an outer cover of a cordless telephone, and a printed circuit board provided in the outer cover for mounting an electronic circuit required for cordless telephone communication. In, the plurality of first protrusions provided on the upper case or the lower case for supporting the printed circuit board, and the plurality of first protrusions provided on the printed circuit board respectively loosely. A plurality of holes to be fitted, a plurality of second protrusions provided in the lower case or the upper case for facing the first protrusion and for sandwiching the printed circuit board, and the exterior cover And a support body having an elastic structure for press-contacting and supporting the periphery of the printed circuit board, the cordless telephone set being provided. 2. The cordless telephone according to claim 1, wherein the support body having the elastic structure is interposed between the upper case and the lower case and has an endless structure.