JPH10294981A - Microphone mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a microphone mechanism improved in frequency characteristics of microphone easy in assembling work, small in size and capable of being used as a high-performance built-in microphone. SOLUTION: In this microphone mechanism in which a main body part 7 of microphone having a weight ring 8 is held by a microphone holder 9 provided with a damper member 10 having a vibration absorbing function, stopper walls 12 and 13 for the weight ring 8 and the main body part 7 of microphone are installed at the front part and rear part of microphone holder 9. A flange part 11 provided at the outer terminal part of damper member 10 is held being sandwiched between a main body part 1 of video camera and a microphone holder 16, so that air tightness inside and outside the microphone can be kept.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microphone mechanism incorporated in an electronic device such as a video camera device, and more particularly, to a microphone device having improved frequency characteristics, easy assemblability, small size, and low power. This makes it possible to reduce costs.

[0002]

2. Description of the Related Art Conventionally, in a microphone mechanism built in a video camera device or the like, vibration generated by, for example, rotation of a motor of a video mechanism or rotation of a tape reel or a head drum is generated from a device body or a cabinet. In order to prevent transmission to the microphone body (hereinafter simply referred to as the microphone body), the microphone body is supported by the device body via a rubber microphone holder having a damper having a function of absorbing vibration. There is something like that.

Also, a weight ring is provided around the microphone body to increase the vibration absorbing effect of the damper. The microphone body and the weight ring are held by a microphone holder to constitute a microphone unit. doing.

[0004]

However, the above-mentioned microphone unit has a problem that the microphone characteristics are deteriorated when the weight ring is directly fixed to the microphone body by caulking.

Conventionally, the microphone body and the weight ring are fixed with an adhesive or the like in order to prevent the microphone body and the weight ring from coming out of the microphone holder.

In the structure of the conventional microphone unit configured as described above, the vibration transmitted from the device main body to the microphone holder is transmitted to the microphone unit as vibration noise reaching a band of several KHz. As a result, the S /
The N-ratio deteriorated and the built-in microphone had low performance.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has a microphone mechanism that improves the frequency characteristics of a microphone, facilitates assembling and can be reduced in size, and is a high-performance built-in microphone. The purpose is to obtain.

[0008]

In order to achieve the above-mentioned object, a microphone mechanism according to the present invention comprises a weight ring and a microphone main body held by a retaining wall of a microphone holder, and a flange at an end of a damper member. Are sandwiched and fixed between the electronic device main body and the holding member to maintain airtightness.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a microphone mechanism according to the present invention applied to a built-in microphone of a video camera device will be described with reference to the drawings.

FIG. 1 is a perspective view of the appearance of a video camera device. A front cabinet 2 is provided on the front of a video camera body 1, and a microphone unit 3 is arranged in the front cabinet 2. Note that a photographing lens unit 4 is provided above the front cabinet 2, and a viewfinder 5 is disposed on the video camera body 1 side.

FIG. 2 is an exploded perspective view of the microphone mechanism, and FIG. 3 is an enlarged sectional view of the microphone mechanism in an assembled state.

The microphone unit is denoted by reference numeral 6, and in this example, a pair of microphone units are provided side by side, and one microphone unit 6 is shown separately. The microphone unit 6 holds a capsule-shaped microphone body 7, a cylindrical weight ring 8 made of, for example, brass, which is inserted into the outer peripheral surface of the microphone body 7, and the microphone body 7 and the weight ring 8. The microphone holder 9 is made of a cylindrical body made of a rubber material such as a flexible elastomer.

FIG. 3 is a sectional view of the microphone unit 6 in an assembled state. A thin damper member 10 is integrally formed on the outer peripheral surface on the front side of the microphone holder 9. The damper member 10 is formed in a cylindrical shape so as to cover the outer periphery of the microphone holder 9, and a thick flange portion 11 is formed at an outer peripheral end.

On the other hand, at the front end of the microphone holder 9, a flange-shaped retaining wall 12 having a window hole 12a in the center is integrally formed. A flange-shaped retaining wall 13 having a relatively large opening 13a at the center is also integrally formed at the rear end of the microphone body 9. Further, the retaining wall 13
4A, two slit grooves 14 are formed in a part (in this example, on the side opposite to the retaining wall 13) as shown in FIG. 4A.

The weight ring 8 and the microphone body 7 are assembled into the microphone holder 9 by first turning up the retaining wall 13 and inserting the weight ring 8 on the inner peripheral surface of the microphone holder 9. Then, after the microphone main body 7 is inserted into the weight ring 8, the assembly of the microphone unit 6 is completed by returning the raised retaining wall 13 to the original position. Further, the above-mentioned microphone unit 6 is provided with the window hole 1 at the center of the retaining wall 12.
2a is a sound collecting unit of the microphone body 7, and the microphone body 7
The lead wire 7a is pulled out from the opening 13a of the retaining wall 13.

The work of raising the retaining wall 13 can be easily performed by forming the slit groove 14, and the work of inserting the weight ring 8 and the microphone body 7 can be performed quickly. it can. Further, by increasing the number of the slit grooves 14 and forming them in, for example, a cross shape as shown in FIG. 4B, the retaining wall 13 can be more reliably turned up.

According to the microphone unit 6 configured as described above, the weight ring 8 and the microphone main body 7 inserted into the microphone holder 9 do not fall off at the front end side by the retaining wall 12, and , On the rear end side, without falling off by the retaining wall 13,
The weight ring 8 and the microphone main body 7 can be stably held without being bonded to the microphone holder 9 or fixed by caulking.

Next, the mounting structure of the microphone unit 6 will be described with reference to FIGS.

A microphone housing 15 is formed in the front cabinet 2. Two holes 15a, 15a arranged side by side are opened on the bottom surface of the microphone housing portion 15, and there is a screw hole 15b between the holes 15a, 15a.

The microphone holder 16 for supporting the microphone unit 6 from the front side has accommodation holes 16a, 16a for accommodating the two microphone units 6, respectively.
Boss 17 having screw hole 17a formed between 6a and 16a
Is protruding. Then, a microphone grill 18 is attached to the outside of the microphone holder 16. A filter 19 such as a sponge is attached to the inner surface of the microphone grill 18, and the engagement holes 20 a of the plurality of engagement pieces 20 provided on the microphone grill 18 are locked and fixed to the engagement claws 16 b of the microphone holder 16. You.

The procedure for assembling the microphone unit 6 is as follows.
Holes 15a, 1 of storage section 15 of front cabinet 2
5a, each lead wire 7a of the microphone body 7,
7a through the flange 11 at the end of the damper member 10.
Is positioned on the bottom surface of the storage unit 15. Thereafter, the microphone holder 16 having the microphone grill 18 attached thereto from the front of the microphone unit 6 is attached to the end of the microphone holder 16 with the microphone units 6 and 6 accommodated in the accommodating holes 16a and 16a, respectively. Press against flange 11. In this state, the front cabinet 2
A stopper plate 22 to which a cushion sheet 21 such as a sponge is attached is positioned on the inner surface of the front cabinet 2.
a, and is screwed to the boss 17 of the microphone holder 16 to complete the assembly.

That is, the microphone unit 6 is supported in such a manner that the flange portion 11 of the damper member 10 is strongly sandwiched between the front cabinet 2 and the microphone holder 16, and the microphone holder 9 is suspended from the damper member 10. You. Thus, the vibration transmitted from the video camera body 1 to the front cabinet 2 is effectively absorbed by the damper member 10 so that the influence of the vibration of the microphone body 7 can be reduced.

The flange portion 11 of the damper member 10
Is strongly sandwiched between the front cabinet 2 and the microphone holder 16 so that the airtightness between the inside of the front cabinet 2, that is, the video camera body 1 and the microphone sound-collecting unit can be improved. Further, by attaching the stopper plate 22, it is possible to prevent sound from the video camera body 1 from entering the microphone.

In FIG. 5, the lead wire 7a of the microphone body 7 is drawn out from the cushion sheet 21 of the stopper plate 22, and a connector 7b provided at the end thereof is connected to a circuit board (not shown). In addition, in FIG. 2, a concave portion 22 formed in the cushion sheet 21 of the stopper plate 22 is provided.
a is a cushion sheet 21 at the rear of the microphone unit 6.
Are recesses to prevent contact.

As described above, in the microphone mechanism according to the present invention, in the microphone unit 6 having the damper function of absorbing external vibration, the retaining walls 12 and 13 are provided at both ends of the microphone holder 9. The weight ring 8 and the microphone body 7 that are inserted into the microphone holder 9 can be prevented from falling off without performing bonding or caulking. Further, since a plurality of slit grooves 14 are formed in the retaining wall 13, the lifting can be easily performed, and the workability of inserting the weight ring 8 and the microphone main body 7 into the microphone holder 9 is also easy. Becomes

The flange 11 provided on the damper member 10 is connected to the front cabinet 2 and the microphone holder 16.
With this structure, the microphone unit 6 is strongly sandwiched between the front cabinet 2 and the microphone unit 6 to be supported. Therefore, from the above, the microphone mechanism of the present invention can improve the frequency characteristics required for the built-in system, improve the assemblability of the microphone unit, and realize the reduction in size and cost. Can be.

The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.

FIG. 6 is a sectional view showing another mounting structure of the microphone unit 6. According to this, the flange 11 of the damper member 10 is positioned on the edge 24 a of the front cabinet 2 in a state where the microphone unit 6 is housed in the microphone housing 24 from the back side of the front cabinet 2. The stopper plate 25 is pressed against the flange portion 11 from the rear surface side, and the stopper plate 25 is fixed to the front cabinet 2 with screws (not shown). In the above-described configuration, the microphone grill 26 is attached to the front surface of the microphone housing portion 24 of the front cabinet 2, and the lead wire 7 a of the microphone body 7 is pulled out from the hole formed in the stopper plate 25 via the sponge material 25 a.

By using the microphone mechanism as described above, the microphone holder 22 is not required from the microphone mechanism shown in FIG. 5, and the configuration is extremely simple, the assemblability is improved, and the cost can be reduced.

Although the microphone mechanism according to the present invention has been described as applied to a built-in microphone of a video camera device, the present invention can be widely applied to a microphone mechanism of an electronic device having a built-in microphone.

[0031]

As described above, the microphone mechanism of the present invention has a weight ring and a microphone which are inserted into the microphone holder without performing bonding or caulking by providing the retaining wall on the microphone holder. The main body can be prevented from falling off. In addition, the airtightness between the inner side of the electronic device main body and the microphone sound collecting unit side is improved by adopting a mounting structure in which the flange portion provided on the damper member is sandwiched and supported between the electronic device main body and the holding member. Can be. As a result, the frequency characteristics required for the built-in system can be improved, the assemblability of the microphone unit can be improved, and the size and cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a video camera device.

FIG. 2 is a perspective view of a separated state of the microphone mechanism according to the present invention.

FIG. 3 is a sectional view of a microphone unit.

FIG. 4 is a rear view of an A microphone holder. B is a rear view of another example of the microphone holder.

FIG. 5 is a cross-sectional view of the microphone mechanism in an assembled state.

FIG. 6 is a cross-sectional view of a modified example of the microphone mechanism.

[Explanation of symbols]

1 video camera body, 2 front cabinet,
6 microphone unit, 7 microphone body, 8 weight ring, 9 microphone holder, 10 damper member, 11 flange, 12, 13 retaining wall, 16 microphone holder, 18 microphone grill, 21 stopper plate

Claims (2)

[Claims] 1. A microphone body having a weight ring is inserted into a microphone holder having a damper member having a vibration absorbing function, and the microphone holder is supported by the electronic device body via the damper member. In the built-in type microphone mechanism, the weight ring and the retaining wall for preventing the removal of the microphone body are provided at the front and rear portions of the microphone holder, and a flange portion is provided at an outer peripheral end of the damper member. A microphone mechanism, wherein the flange portion is sandwiched and fixed between the electronic device main body and the holding member, and the airtightness inside and outside the electronic device main body is maintained. 2. The microphone mechanism according to claim 1, wherein a slit groove is formed in a retaining wall on one side of the microphone holder, so that the retaining wall is easily turned up. .