JPS599494Y2 - Microphone vibration isolation mechanism - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a vibration isolation mechanism for a microphone suitable for use in, for example, a tape recorder or a cine camera equipped with a simultaneous recording mechanism.

Recently, cine cameras equipped with a so-called simultaneous recording mechanism that can record audio at the same time as taking pictures have become popular.

Such a cine camera is constructed such that a microphone is attached to the tip of a rod-shaped support extending from the camera body, and audio can be recorded using the microphone in synchronization with the operation of the cine camera. .

By the way, simply attaching the microphone to the tip of the rod-shaped support extending from the camera body as described above will not work.
There is a problem in that when the cine camera is operated, mechanical vibrations caused by rotation of a motor built into the cine camera body are transmitted to the microphone via the rod-shaped support, deteriorating the S/N ratio.

Further, this problem is not limited to cine cameras, but also applies to tape recorders, etc., where mechanical vibrations of the motor have an adverse effect on the built-in microphone.

For this reason, various measures to eliminate vibrations have been developed, such as wrapping the microphone with an elastic shock absorbing member, but none of them have been able to achieve sufficient effects.

Therefore, conventionally, vibration isolating mechanisms have been developed that have sufficient vibration isolating effects to eliminate the adverse effects of vibration on the microphone, can support the microphone stably and reliably, and can fully meet the needs of the user. There is a strong demand for the development of

This idea was developed based on the above circumstances, and the aim is to provide an extremely good microphone vibration isolation mechanism that can obtain sufficient vibration isolation effects and support the microphone stably and reliably. I'm going to do it.

Hereinafter, an embodiment in which this invention is applied to a cine camera equipped with a simultaneous recording mechanism will be described in detail with reference to the drawings.

In FIG. 1, reference numeral 11 denotes a microphone section, which is attached to a cine camera body (not shown) via a rod antenna-shaped support 12.

As shown in FIG. 2, this microphone section 11 is constructed by covering a cylindrical microphone assembly 13 with a first mesh 14 formed into a cylindrical shape using a fine mesh member.
A roughly dome-shaped head on top of that? cover the head case assembly 15, and open the opening 16 of the head case assembly 15.
is closed with a head base 17.

Then, by fitting the attachment part 19 of the supporter 12 into the recess 18 formed on the back surface of the head case 17 and tightening it with a screw 20, the microphone part 11 and the supporter 12 are fitted.
is attached.

In addition, the connection wire 21.2 of the microphone assembly 13
1 is inserted through a not-illustrated through hole penetrating the head base 17 and connected to a connection electrode 22 formed on the mounting portion 19 of the support 12 .

This connection electrode 22 is connected to a microphone input terminal of a recording circuit of the cine camera body via a connection wire (not shown) that passes through the support 12.

Here, FIG. 3 shows the head case assembly 15.
It shows the details of the cylindrical shape with multiple side surfaces (
In the head case 23, which has large notches (three places in the case shown), second to fourth meshes 24 to 26 are formed into cylindrical shapes of different sizes using net-like members with different mesh coarseness. "They are stored one on top of the other.

Further, fifth to seventh meshes 27 to 29, which are made of net-like members having different mesh coarseness and each shaped like a hemisphere and have different sizes, are attached to one end of the head case 23 in an overlapping manner. It is what it is.

FIG. 4 shows details of the microphone assembly 13, in which the microphone units 1 and 31 are loosely inserted into a cylindrical frame 30, and an elastic member 32 made of rubber or the like is inserted.
It is suspended within the frame 30 by.

This frame 30, as shown in FIG. 5 a, l), c,
It has a large number of through holes 33 on the side surface, and notches 34 and 35 are formed at both ends thereof at intervals of approximately 120 degrees.

The openings of these cut arrow portions 34 and 35 are narrow, and the innermost portions widen to the left and right in the figure to form locking portions 36 and 37.
It takes shape.

Here, as shown in FIG. 6, the microphone unit 31 includes a microphone main body 38, a weight 40 having a mounting portion 39 that supports the rear circumferential side of the microphone main body 38, and a weight 40 that supports the microphone main body 38 at the front. Sound part 4
A first unit cap 42 that covers from the first side, and a second unit cap 43 that covers the entire weight 40 from the rear side.
It is more than that.

The weight 40 is made of a metal material, and has a cylindrical shape with a through hole 44 formed in its center, as shown in FIGS. 7a and 7l.

Attachment portions 39 are provided at one end of the weight 40 at approximately 90° intervals.

The mounting portion 39 has a step in the shape of a crank on its side, and is shaped like a first mounting portion 45 and a second mounting portion 46 .

The weight 40 and the microphone body 38 are attached by fitting the rear circumferential side of the microphone body 38 between the first attachment portions 45 .

At this time, the connection wires 21.21 extending from the rear of the microphone body 38 are inserted through the through holes 44 of the weight 40 and led out to the rear surface of the weight 40.

Note that FIG. 7b is a cross-sectional view of the portion indicated by the dashed line in FIG. 7a.

In addition, the lth unit cap 42 is shown in FIGS.
), c, a substantially cylindrical hanging portion 48 having a diameter smaller than that of the cap portion 47 is formed at one end of the substantially cylindrical cap portion 47, and the side surface thereof has a substantially convex shape. .

Notches 49 are formed in this hanging portion 48 at approximately 120° intervals, and each of these notches 49 has a narrow opening, and the innermost part widens to the left and right in the figure to form a locking portion 50. ing.

Then, the side surface of the microphone main body 38 and the weight 4
By inserting the opening of the cap part 47 between the microphone body 38 and the second mounting part 46 of the
A unit cap 42 is attached to the unit cap 42.

Note that FIG. 8C is a cross-sectional view of the portion indicated by the dashed line in FIG. 8A.

On the other hand, the second unit cap 43 has a similar structure to the first unit cap 42 and is attached to the rear part of the weight 40.

Next, a means for suspending the microphone unit 31 constructed as described above within the frame 30 via the elastic member 32 will be explained.

That is, as shown in FIG. 9, the elastic member 32 has l annular shapes.

Then, this elastic member 32 is attached to the lth unit cap 4.
The frame 30 is inserted into a notch 49 formed in the hanging portion 48 of No. 2, and is locked by the locking portion 50, and is also inserted into the notch 34 of the frame 30, and is locked by the locking portion 36.

That is, both the locking parts 50 and 36 are locked alternately, and the first unit cap 42 is eventually suspended within the frame 30 so as to be pulled from three directions.

In this case, the elastic member 32 is connected to the locking portion 36 of the frame 30.
a first portion A that is locked along the outer periphery of the frame 30; a second portion B that is locked to the locking portion 50 of the microphone unit 31; Part B
It is functionally divided into a third part C that connects the microphone unit 31 to the frame 30 and allows the microphone unit 31 to be suspended within the frame 30.

In other words, the elastic member 32 can be said to be formed by integrally forming the first part A, the second part B, and the third part C.

Further, the second unit cap 43 is also attached to the frame 30.
It is suspended by an elastic member 32 in substantially the same manner as shown in FIG. 9, and the result is as shown in FIG. 4.

Therefore, according to the structure of the above embodiment, the frame 30 and the microphone unit 31 are connected through only one elastic member 32, so that the frame 30 and the microphone unit 31 are connected to each other through only one elastic member 32. }Mechanical vibrations caused by overnight rotation can be absorbed by the elastic member 32 and prevented from being transmitted to the microphone unit 31, and problems such as deterioration of the S/N ratio, which are conventional, can be eliminated.

Further, since the microphone unit 31 is pulled from three directions and the elastic member 32 is securely locked to each locking portion 36, 37, 50, the microphone unit 31 can be supported stably and reliably. can.

Further, in the above embodiment, the microphone unit 31 is hung from three directions, but it may be hung from four directions as appropriate.

Further, as the locking portion of the microphone unit, for example, one pin or the like may be provided at the center of each end.
In short, the locking portion 50 of the microphone unit 31 only needs to have a structure that allows it to come into contact with the elastic member 32 and connect the elastic member 32 and the microphone unit 31. The same can be said of the locking portion 36 of No. 30.

Note that this invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without departing from the gist thereof.

Therefore, as detailed above, according to this invention, it is possible to provide an extremely good microphone vibration isolation mechanism that can obtain a sufficient vibration isolation effect and support the microphone stably and reliably. .

[Brief explanation of the drawing]

Fig. 1 is an external view showing the microphone section of a cine camera with a simultaneous recording mechanism to which this invention is applied, Fig. 2 is an exploded view showing the structure of the microphone section, and Fig. 3 is an exploded view of the head case of the microphone section. FIG. 4 is a side sectional view showing the structure of the microphone assembly of the microphone assembly; FIG. 5 a, l), and c are top views showing the shape of the frame of the microphone assembly, respectively. Figure 6 is an exploded view showing the configuration of the microphone unit of the microphone assembly;
Figures 7a and 1) are a front view and a partially sectional side view showing the shape of the weight of the microphone unit, respectively, and Figures 8a, l) and c are the first unit cap of the microphone unit, respectively. FIG. 9 is a top view, a side view, and a partially sectional side view showing the shape of the microphone, and FIG. 9 is a front view showing an embodiment of the vibration isolation mechanism of the microphone according to the invention. 11...Microphone section, 12...Support, 13...Microphone assembly, 1
4...First mesh, 15...Head case assembly, 16...Opening, 17
...Head base, 18...Concavity, 1
9...Mounting part, 20...Screw, 21.
21... Connection wire, 22... Connection electrode,
23...Head case, 24 to 26...
...Second to fourth meshes, 27 to 29...
- Fifth to seventh meshes, 30... frame, 31... microphone unit, 32...
...Elastic member, 33...Through hole, 34.35.
...Notch part, 36.37...Locking part, 3
8...Microphone body, 39...Mounting section, 40...Weight, 41...Sound collecting section, 42...First Unit cap, 43
...Second unit cap, 44...
・Through hole, 45...First mounting part, 46...
...Second mounting part, 47...Cap part, 48
... Suspension part, 49 ... Notch part, 50.
...Locking part.

Claims (1)

[Scope of utility model registration request] A cylindrical frame having a plurality of locking portions at both ends, a microphone unit loosely inserted into the frame and having locking portions at both ends, and a cylindrical frame having a plurality of locking portions on the outer periphery of the frame. a plurality of first portions that are respectively locked along the microphone unit; a second portion that is locked to a locking portion of the microphone unit; and a plurality of first portions and the second portion that are connected to each other; A vibration isolating mechanism for a microphone, comprising: an elastic member integrally formed with a third portion for suspending a microphone unit within the frame.