JPH0946403A - Water-proof structure for sounder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an inexpensive mount structure with excellent installation workability taking a water-proof structure for a sounder being a call reception indication used for a portable radio telephone set or the like into account. SOLUTION: Close adhesion use rubber rings 3a, 3b are inserted with close adhesion between a case 1 with a slit 7 made thereto and having a rib 2 in the inner face and a sounder 5 with a sound hole 9 made thereto. A water-proof sheet 4 is inserted between the close adhesion rubber rings with a sufficient thickness and with a hole 8 made thereto in the middle. The water-proof sheet 4 receives a sound produced from the sounder 5 as an amplitude of air compression waves and is vibrated freely. The water-proof structure is attained with a simple structure and excellent installation workability at a low cost in which a sufficient sound pressure is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sounder waterproof structure, and more particularly to a sounder waterproof structure for portable radio telephones and the like.

[0002]

2. Description of the Related Art A conventional waterproof structure of this type is shown in FIG.
There is something like that shown in In this conventional example, a housing recess 18 for housing a microphone 17 is formed on the back surface of the microphone rib 14 provided in the housing 13, and inside the microphone rib 14,
The microphone rubber 16 forming a ridge 19 along the outer periphery of the front surface is arranged, and the vinyl sheet 1 is provided in the microphone rib 14.
The microphone rubber 16 accommodating the microphone 17 is pushed in with the microphone 5 sandwiched therebetween, and the microphone 17 is fixed so that the microphone 17 is waterproofed (for example, JP-A-3-11224).
No. 2).

[0003]

In this conventional waterproof structure, the structure is complicated and large.
Also, a vinyl sheet 15 for waterproofing is provided in the microphone rib 14.
The microphone rubber 16 containing the microphone 17 is pushed in between them, and the microphone 17 is fixed, so that it takes time to push the microphone rib 14 into the microphone rib 14, and the vinyl sheet 15 is sandwiched between the microphone rib 14 and the microphone rubber 16, so that vinyl for waterproofing is provided. There was a problem that the seat 15 could not be attached accurately and wrinkled.

[0004] For the purpose of simplification, a structure in which a waterproof sheet is directly attached to the front of the housing is considered.
In this method, since the waterproof sheet cannot be sufficiently swung by being sandwiched between the housings, the acoustic resistance increases, and the method is not suitable for a mounting structure requiring a large sound volume such as a sounder.

An object of the present invention is to provide a sounder waterproof structure having a simple structure which facilitates construction and does not reduce sound pressure.

[0006]

A waterproof structure for a sounder according to the present invention comprises a sounder as an incoming call display housed inside a housing having a sound output hole in a portable radio telephone, and a sounder mounted on the front surface of the sounder. The first adhesion rubber ring, a waterproof sheet covering the front surface of the first adhesion rubber ring, and a second adhesion rubber ring attached to the front surface of the waterproof sheet. The front surface of the rubber ring is brought into close contact with the sound output hole portion of the housing.

In the waterproof structure of the sounder, is a rib provided for pressing the first and second contact rubber rings provided around the sound output hole on the inner surface of the housing,
Alternatively, the second adhesion rubber ring is directly adhered to the sound output hole portion of the housing, and the waterproof sheet is a vinyl sheet, or the waterproof sheet is a non-woven fabric. (Teflon type).

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIGS. 1A and 1B show a first embodiment of the present invention, in which FIG. 1A is a sectional view, FIG. 1B is a perspective view, and FIG. 2 is an exploded perspective view showing a main structure of the embodiment. .

As shown in FIGS. 1 and 2, in a first embodiment of the present invention, a housing 1 of a portable radio telephone (integrated type) 20a accommodating a sounder 5 as an incoming call display is provided.
A slit 7 as a sound emission hole is formed, while a sounder 5 having a sound hole 9 is mounted on a printed board 6 in the housing 1. Since the sounder 5 is attached to the printed board 6 at the correct position, the rib 2 for pressing the sounder 5 from above is formed by the slit 7 of the housing 1.
Is formed on the inner surface around. Rib 2 and sounder 5
Between them, elastic rubber rings 3a and 3b for adhesion and a waterproof sheet 4 are provided. That is, the two rubber rings 3a and 3b for tight contact sandwiching the waterproof sheet 4
This embodiment is constituted by fixing between the sounder 5 and the rib 2 while pushing it. The waterproof sheet 4 is made of a vinyl sheet.

As described above, in the first embodiment in which the rubber rings 3a and 3b are fixed by the ribs 2, the hole 8 is formed in the center of the two rubber rings 3a and 3b. And two rubber rings for close contact 3
Since a and 3b have a sufficient thickness, the waterproof sheet 4 sandwiched between the two rubber rings 3a and 3b is
Receive the sound generated from the sounder 5 as the amplitude of the air,
It can freely vibrate according to the amplitude of air. Even if the waterproof sheet 4 is a thick film, sufficient amplitude freedom can be obtained, so that sufficient sound pressure can be obtained in the same manner as when the waterproof sheet 4 is a thin film, and it is practical and reduces unnecessary man-hours during construction. can do.

FIGS. 3A and 3B show a second embodiment of the present invention, in which FIG. 3A is a sectional view and FIG. 3B is a perspective view.

In the second embodiment, as shown in FIG. 3, since the battery pack 10 is mounted on the rear part of the housing 11 in the portable radio telephone (foldable type) 20b, the mounting portion of the sounder 5 is provided. Shows an example in which the sounder 5 is mounted not vertically on the printed board 6 but in a narrow mounting space, and the housing 11 has no ribs. It is. The main components of this embodiment, such as the rubber rings 3a and 3b for adhesion and the waterproof sheet 4, are the same as those of the first embodiment shown in FIG.

As shown in FIG. 3, when the sounder 5 is vertically mounted on the printed board 6, the case 11 is complicated by the method of fixing with the ribs as in the first embodiment. The work of storing the data in the 11 also requires a lot of man-hours. Therefore, when the sounder 5 is mounted vertically to the printed board 6, the rubber ring 3 for tight contact with the waterproof sheet 4 directly interposed in the case 11 without ribs.
a, 3b are adhered (mounted), and the waterproof rubber sheet 3 is sandwiched between the housing 11 and the sounder 5 by the close contact rubber rings 3a, 3b.
b is sandwiched and fixed.

As shown in FIG. 3, in the case 11 in which only the slit 7 is formed, a hole 8 is formed in the center inside the case 11, and the rubber ring 3a for tight contact with the waterproof sheet 4 interposed therebetween. , 3b are directly bonded, and the sounder 5 is incorporated.

As in the first embodiment, the waterproof sheet 4 receives the sound generated from the sounder 5 as the amplitude of the air by the holes 8 formed in the close contact rubber rings 3a and 3b having a sufficient thickness. It is possible to vibrate freely according to the amplitude of the air, and a sufficient degree of freedom is obtained even with the thick waterproof sheet 4, and sufficient sound pressure can be obtained as in the case of the thin waterproof sheet 4, practical and construction In this case, unnecessary man-hours can be reduced. The rubber rings 3a and 3b for close contact shown in FIG. 3 can have as much thickness as possible because of the absence of the ribs on the housing 11, so that the degree of freedom in amplitude can be sufficiently obtained.

The second embodiment simplifies the structure that is complicated by forming the ribs, or prevents the rubber ring for contact from shifting when the sounder is pushed into the place where the ribs are formed. It is effective to apply it when necessary countermeasures are required. Further, the present invention may be applied to a structure in which there is no space for forming a rib in a housing.

In the above-described embodiment, the vinyl sheet is used as the waterproof sheet 4, but the material is not limited to this, and other materials having the same function, for example, non-woven fabric (Teflon type) are used. May be.

[0019]

As described above, according to the present invention, the waterproof structure of the conventional sounder, which is complicated and requires a lot of man-hours, is waterproofed by two rubber rings for adhesion having a hole formed in the center and having a sufficient thickness. By pressing the sheet sandwiched between the inner surface of the housing and the sounder to fix it tightly, it is possible to obtain a simple structure with good workability, low cost and sufficient sound pressure. There is.

[Brief description of drawings]

FIGS. 1A and 1B are cross-sectional views and a perspective view, respectively, showing a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a main configuration in FIG.

3A and 3B are cross-sectional views and a perspective view, respectively, showing a second embodiment of the present invention.

FIG. 4 is a sectional view showing an example of a conventional waterproof structure of this type.

[Explanation of symbols]

 1, 11, 13 Housing 2 Rib 3a, 3b Rubber ring for close contact 4 Waterproof sheet 5 Sounder 6 Printed board 7 Slit 8 Hole 9 Sound hole 10 Battery pack 12 Space 14 Microphone rib 15 Vinyl sheet 16 Microphone rubber 17 Microphone 18 Storage recess 19 Protrusion 20a Portable wireless telephone (integrated type) 20b Portable wireless telephone (foldable type)

Claims (5)

[Claims] 1. A sounder as an incoming call display housed inside a housing having a sound output hole in a mobile radio telephone,
There is a first contact rubber ring attached to the front surface of the sounder, a waterproof sheet covering the front surface of the first contact rubber ring, and a second contact rubber ring attached to the front surface of the waterproof sheet. Then, the waterproof structure of the sounder is characterized in that the front surface of the second contact rubber ring is brought into close contact with the sound output hole portion of the housing. 2. The waterproof structure for a sounder according to claim 1, wherein a rib that presses the first and second contact rubber rings is provided around the sound output hole on the inner surface of the housing. 3. The sounder waterproof structure according to claim 1, wherein the second contact rubber ring is directly adhered to a portion of the sound output hole of the housing. 4. The waterproof structure for a sounder according to claim 1, wherein the waterproof sheet is a vinyl sheet. 5. The waterproof sheet is a non-woven fabric (Teflon-based)
The waterproof structure for a sounder according to any one of claims 1 to 3, comprising: