JPS6320231Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a microphone.

In cases where a microphone is installed on the floor etc. via a microphone stand and the microphone is used to record music, for example,
When a performer or the like walks on the floor, the vibrations are transmitted to the microphone, causing the diaphragm to vibrate slightly, which can cause noise. Further, even when the microphone is touched with the hand, noise may be generated depending on the way the microphone is touched.

For this reason, the diaphragm unit built into the microphone body is supported in a loose manner by a cushioning material made of a soft elastic material, so that external mechanical vibrations are absorbed by the cushioning material. has already been proposed.

That is, FIG. 1 shows a conventional example of this type of microphone, in which a diaphragm unit 7' is housed in a substantially cylindrical casing 1' with buffer materials 8' and 9' interposed therebetween. However, in conventional microphones, the cushioning materials 8' and 9' are made of a relatively soft material such as sponge, and the diaphragm unit 7' is supported at only two locations, resulting in unstable support. However, due to vibrations, the diaphragm unit 7' may oscillate in the axial direction, that is, may move up and down in the illustrated state as shown by the arrows, and such lateral oscillation may cause greater noise generation. It was hot.

The present invention was proposed in view of the above points, and it prevents the diaphragm unit from lateral shaking and supports the diaphragm unit so that it can move in the direction of the main axis of the microphone against external vibrations. The object of the present invention is to provide a microphone that absorbs light.

The present invention will be explained below with reference to the drawings.

2 and 3 show an embodiment of the microphone according to the present invention, in which 1 has a sound hole 1a and is fixed and connected to the base 3 of the microphone body 2 by screwing means etc. A cylindrical casing, 4 a cap attached to the opening of the casing 1, 5 a windscreen provided on the inner peripheral wall of the casing 1, and 6 a cylindrical vibrator whose base end 6a is fixed to the base 3. Plate unit holder, 7
1 is a diaphragm unit housed in a diaphragm unit holder 6 via a support device so as to be movable in the direction of the main axis, and a diaphragm is built into the distal end as is well known.

Thus, the support device has a first buffer material 8 and a second buffer material 9 arranged between the diaphragm unit holder 6 and the diaphragm unit 7 . The first cushioning material 8 functions as a sliding material and is formed of a spherical cushion ball made of an elastic material such as relatively hard rubber. It is in contact with the ring-shaped recess 7a and also in contact with the step 6b formed on the inner peripheral surface of the opening of the diaphragm unit holder 6, and is able to roll within the area within the step 6b. There is. The second cushioning material 9 supports the base end, ie, the bottom, of the diaphragm unit 7 , and is constructed by connecting first and second annular members 9a and 9a facing each other. That is, each of the annular members 9a, 9a has locking portions 9b that stand up at both ends, and a hemispherical portion 9c in the center, and by facing the hemispherical portions 9c, a hollow sphere can be formed. It's becoming like that. Further, 9d in the figure is an air vent hole. Each of the locking portions 9b is configured to be locked and fixed in groove-shaped locking portions formed corresponding to the bottom outer peripheral surface of the diaphragm unit 7 and the inner peripheral surface of the diaphragm unit holder 6, respectively. There is.

Note that the second cushioning material 9 is made of a relatively soft material.

Therefore, as mentioned above, a cushion ball is provided between the diaphragm unit holder 6 and the diaphragm unit 7 , and the bottom of the diaphragm unit 7 is provided with a second buffer that functions like a diaphragm-like damper. The diaphragm unit 7 is supported by a member 9, so that the diaphragm unit 7 is movable in the axial direction as shown by the arrow. Therefore, when vibrations are transmitted to the microphone body 2 during use, the vibrations are converted into axial movement of the diaphragm unit 7 , thereby preventing the generation of noise. That is, the diaphragm unit 7 is provided with a diaphragm coupled to a coil placed in a magnetic circuit so that it can vibrate in the front-rear direction, that is, in the main axis direction, and an excitation force acting on the diaphragm at a certain acceleration other than sound pressure is generated. (Vibration noise) is canceled out by the motion of the diaphragm unit 7 which can move in the same direction as the diaphragm, thereby canceling out the excitation force acting on the diaphragm. In this case, the second buffer material 9
Since the diaphragm unit 7 is formed of a pair of annular members having hemispherical portions 9c facing each other, the movement in the axial direction is stable and the diaphragm unit 7 can be quickly stopped at an appropriate position. .

Although it is sufficient that the number of cushion balls is at least three, they may be provided over substantially the entire outer peripheral surface of the diaphragm unit 7 , as shown in FIG. 3B. Moreover, it is of course possible to use an annular sliding member 8a such as rubber coated with a lubricating oil such as grease as shown in FIG. 3C instead of the cushion ball.

As described above, according to the present invention, the substantially central portion of the diaphragm unit is supported by a sliding material made of a hard elastic member, and the base end of the diaphragm unit is supported by a buffer material made of a damper-like elastic member. , since the diaphragm unit is configured to be movable in its axial direction,
When external mechanical vibrations are applied to the microphone body, the external vibrations are converted into axial movement of the diaphragm unit, which has the effect of suitably suppressing the generation of noise due to external vibrations.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a cross section of a conventional microphone by cutting a part of it, Fig. 2 is an explanatory diagram of a cross section of the microphone according to the present invention, Fig. 3 A is an explanatory diagram of the main part of the above, and Fig. Figure A is an explanatory cross-sectional view taken along the line A-A in Figure A, and Figure C shows another embodiment of the sliding material used in the present invention. 1...Casing, 2 ...Microphone body,
6... diaphragm unit holder, 7 ... diaphragm unit, 8, 9... first and second buffer materials, 9a...
...Annular member, 9b...Locking portion, 9c...Semispherical portion.

Claims (1)

[Scope of utility model registration request] In a microphone in which a diaphragm unit having a diaphragm is built into a casing, a substantially central portion of the diaphragm unit is supported by a sliding member made of a hard elastic member, and a base end of the diaphragm unit is supported by a damper-like member. A microphone characterized in that a diaphragm unit is supported by a cushioning material made of an elastic member and is movable in its axial direction.