JPH0747029Y2 - Waterproof structure of microphone fixing part - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a structure for fixing a microphone to a housing, and particularly to a structure of a waterproof microphone fixing portion.

[Conventional technology]

A conventional waterproof structure for a microphone fixing portion has a holder 5 for accommodating and holding the microphone 1 as shown in an assembled state and a partially disassembled state in FIGS. 3 and 4, respectively. It is fixed at 6.

That is, the holder 5 has a through hole 5b at the center of the bottom surface 5a, and is fitted into the cylindrical projection 6a of the housing 6. A concave portion 6c and a through hole 6b are formed on the inner bottom surface 6d of the cylindrical projection 6a of the housing 6 to allow sound to pass therethrough. Then, a thin waterproof sheet 7 is attached on the inner bottom surface 6d of the cylindrical projection, and the through hole 6b is formed.
Water that further intrudes is prevented from invading the holder 5 or the microphone 1.

[Problems to be solved by the invention]

In the conventional waterproof structure of the microphone fixing portion described above, since the thin waterproof sheet 7 is attached to the inner bottom surface 6d of the cylindrical projection 6a of the housing 6, when the microphone 1 is small, the cylindrical projection 6a is also small. Therefore, it becomes difficult to insert and attach the waterproof sheet 7 into the cylindrical protrusion 6a during assembly. That is, since the waterproof sheet 7 cannot be inserted by grasping it with fingers, and the waterproof sheet 7 is easily broken or wrinkled, the waterproof sheet 7 should be lightly picked and attached so as not to be broken by tweezers. It is necessary to do it, and the attaching work becomes extremely difficult. In addition, it is difficult to handle the waterproof sheet, and it takes much time to assemble.

On the other hand, even from the viewpoint of maintenance, if the waterproof sheet is accidentally broken, it will be difficult to remove the adhered sheet, and it will be difficult to remove the cured adhesive after the waterproof sheet is removed. It takes a lot of time to replace the seat.
In some cases, it becomes impossible to replace the waterproof sheet, which impairs the waterproofness of the microphone and makes it unusable.

It is an object of the present invention to provide a waterproof structure of a microphone fixing portion which is easy to assemble and maintain and has a high waterproof effect.

[Means for solving problems]

According to the waterproof structure of the microphone fixing portion of the present invention, an annular groove is formed inside a protruding edge provided around the bottom surface of a holder formed of an elastic material having a container shape for holding a microphone, and a protrusion is formed outside. A waterproof sheet whose periphery is reinforced with a ring is inserted and supported in this annular groove, and the ridges are configured so as to elastically contact the inner surface of a cylindrical protrusion provided on the housing, and the microphone is inserted through a holder, Moreover, the structure is such that the waterproof sheet is sandwiched and fixed to the housing.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing an assembled state of an embodiment of the present invention,
FIG. 2 is a partially exploded view thereof.

In these figures, in the microphone fixing portion of the present embodiment, the microphone 1 is fixed to the housing 4 via the holder 2, and the waterproof sheet 3 is interposed between the holder 2 and the housing 4. Has become.

That is, the holder 2 is made of a soft material in the shape of a container, and the microphone 1 is fitted in the internal space 2a. A through hole 2c is formed in the center of the inner bottom surface 2b of the holder 2 to allow sound to pass through. Further, a short projecting edge 2d is formed around the inner bottom surface 2b toward the housing side, and an annular groove 2e is formed inside this projecting edge 2d, while on the outside of the projecting edge at a position corresponding to this annular groove 2e. An annular ridge 2f is formed.

The waterproof sheet 3 is made of a thin film sheet, and a hard ring 3a is integrally provided on the periphery of the waterproof sheet 3 to reinforce it. The ring 3a is formed to have an outer diameter substantially equal to that of the annular groove 2e of the holder 2.

Further, the housing 4 has a cylindrical projection 4a into which the holder 2 can be fitted.
Is formed, and a through hole 4b is opened in the inner bottom portion thereof. In this case, the inner diameter of the cylindrical projection 4a is slightly larger than the outer diameter of the holder 2 and slightly smaller than the outer diameter of the annular projection 2f.

Then, while the microphone 1 is fitted into the inner space 2a of the holder 2, the ring of the waterproof sheet 3 is inserted into the lower annular groove 2e.
Insert 3a. Since the holder 2 is made of a soft material, the waterproof sheet 3 can be received in the annular groove 2e by its elastic deformation and can be held so as not to fall off.

Further, the holder 2 is fitted into the cylindrical protrusion 4a of the housing 4. At this time, the projection 2f of the holder 2 is fitted while being deformed, and in the fitted state, it is brought into close contact with the inner surface of the cylindrical projection 4a by the elastic deformation force of the projection 2f, and the liquid tightness is secured in this portion. Even if the deformation force of the ridge 2f acts on the waterproof sheet 3, since the waterproof sheet 3 is reinforced by the ring 3a,
It is not deformed and can maintain the waterproof effect.

Therefore, according to this structure, since the waterproof sheet 3 only needs to be fitted into the annular groove 2e in the short projecting edge 2d of the holder 2, the assembly can be performed easily and the assembly time can be shortened. Further, since the waterproof sheet 3 is held by the elastic force of the holder 2, a sufficient waterproof effect is obtained, and it is not necessary to use an adhesive when assembling the waterproof sheet.
Not only the assembly but also the replacement of the waterproof sheet can be performed very easily.

[Effect of device]

As described above, according to the present invention, an annular groove is formed on the inside of the protruding edge provided on the holder for holding the microphone, and a ridge is formed on the outside thereof, and a waterproof sheet whose periphery is reinforced with a ring is inserted into the annular groove. Since the ridges are supported and are configured so as to elastically contact the inner surface of the cylindrical protrusion provided on the housing, the adhesion between the waterproof sheet, the holder and the housing is improved and damage to the waterproof sheet is prevented. It is possible to prevent and improve the waterproof effect of the microphone fixing part. Further, since no adhesive is used for assembling the waterproof sheet, the number of assembling steps can be reduced and the waterproof sheet can be easily replaced.

[Brief description of drawings]

FIG. 1 is a sectional view of an assembled state of a waterproof structure for a microphone fixing portion of the present invention, FIG. 2 is a partially exploded view of FIG. 1, and FIG.
The drawing is a sectional view of a conventional structure in an assembled state, and FIG. 4 is a partially exploded view of FIG. 1 …… microphone, 2 …… holder, 2a …… internal space, 2b ……
Inner bottom, 2c ... through hole, 2d ... ridge, 2e ... annular groove, 2f ...
… Ridges, 3 …… Waterproof sheet, 3a …… Ring, 4 …… Housing, 4a …… Cylindrical projection, 4b …… Through hole, 5 …… Holder, 5a…
… Inner bottom surface, 5b …… through hole, 6 …… case, 6a …… cylindrical projection,
6b ... through hole, 6c ... recess, 6d ... inner bottom surface.

Claims (1)

[Scope of utility model registration request] 1. A microphone fixing portion comprising a microphone, a container-shaped holder for holding the microphone in a state of being fitted in an internal space, and a casing for fitting and fixing the holder in a cylindrical projection, The holder is made of an elastic material, and an annular groove is formed inside the projecting edge provided around the bottom surface and a projecting line is formed outside, and a waterproof sheet whose periphery is reinforced with a ring is inserted and supported. The waterproof structure of the microphone fixing portion is characterized in that the protrusion is configured to elastically contact the inner surface of the cylindrical projection of the housing to seal the inner surface of the cylindrical projection.