JPH018071Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a holding structure for a microphone, particularly a microphone unit.

A conventional microphone of this type is shown in FIG. In the drawing, A is a microphone unit, B is a back chamber for forming a sealed back cavity at the rear of microphone unit A, C is a case, and between this case C and back chamber B is a damper D made of foam rubber or the like. The microphone unit A is arranged so that vibrations of the case C are not transmitted to the microphone unit A. E is a lead wire of microphone unit A, which is connected to an output terminal (not shown) through a hole in back chamber B. Adhesive or the like is applied to the hole in the back chamber B through which the lead wire E is drawn out for the purpose of sealing, thereby maintaining the airtightness of the back chamber B.

FIG. 2 shows another conventional example, in which a microphone unit A is placed on the upper part of a case G via a first damper F. Reference numeral H denotes a second damper, which is disposed in the case G below the microphone unit A, and whose upward movement is restricted by a stopper I protruding from the inner surface of the case G. J is a screw protruding from the rear surface of the microphone unit A. The screw J is inserted into the center of the second damper H, and a nut K is screwed into the screw J. The lead wire L of the microphone unit A is drawn out through the hole M of the second damper H. In this conventional example, case G itself is a back chamber.

The conventional microphone is constructed as described above, but in the first conventional example, the sealing part of the back chamber B from which the lead wire E is drawn out is extremely unreliable, and it takes a lot of time for the adhesive etc. to harden. It is. Furthermore, if excessive force is applied to the lead wire L during or after the adhesive is cured, airtightness will not be maintained due to pinholes caused by misalignment. Furthermore, since the method of fixing the microphone unit A to the case C is adhesive, it requires a lot of effort until it hardens, and the strength after hardening is also unreliable.

On the other hand, in the case of the second conventional example, the strength of fixing microphone unit A is sufficient, but case G
Since it is itself a back cavity, it is inconvenient when a small volume of back cavity is required. Therefore, in order to reduce the volume, it may be possible to make the second damper H a sealed structure and pass the lead wire L through the small hole and seal it with adhesive or the like, but if you do this, it will be similar to the first conventional example. There are drawbacks. Furthermore, it is conceivable to use a back chamber and protrude the screw J from the center of the bottom of the back chamber, but basically the drawbacks of fixing the lead wire L and the sealing part cannot be removed, and furthermore, the back chamber and case It has the disadvantage of having a double G structure.

The present invention was developed to eliminate the above-mentioned drawbacks, and the microphone unit is placed on the upper part of the case via a first damper, and the terminal board is placed on the lower part of the case via a second damper. Place the
Form a sealed space between this terminal board and the microphone unit, insert the screw protruding from the bottom of the microphone unit into the terminal board, screw the nut, and connect the lead wire of the microphone unit and the output lead wire. To provide a microphone that improves the airtightness of a back cavity and the reliability of mounting a microphone unit by soldering to a terminal board, and also aims to eliminate stock time during mass production.

The present invention will be explained based on the embodiments shown in the drawings. FIG. 3 is a sectional view showing the main parts of the microphone according to the present invention, and FIG. 4 is a plan view showing the constituent parts of the microphone. In the drawing, reference numeral 1 denotes a microphone unit, and a screw 2 is fixed to the center of the rear surface. 3 is a cylindrical case;
A microphone unit 1 is placed on top of the microphone with a first damper 4 interposed therebetween. Reference numeral 5 denotes a disc-shaped terminal board made of a printed circuit board, and this terminal board 5 has a hole 6 into which the screw 2 is inserted and a small hole 8 into which the lead wire 7 of the microphone unit 1 is inserted. , 9 and 10 are printed copper foils. 11 is a short cylindrical second damper, the lower end of which is in close contact with the outer periphery of the terminal plate 5, and the upper end of which is in close contact with the outer periphery of the terminal plate 5.
A back cavity 13 is formed on the rear surface of the microphone unit 1 by the damper 11, the terminal plate 5, the damper 4, the case 3, and the microphone unit 1. Further, the screw 2 described above is inserted into the hole 6 of the terminal plate 5, and the nut 14 is screwed together. Note that the terminal plate 5 is arranged so that the copper foils 9 and 10 are on the nut 14 side. When the lead wire 7 of the microphone unit 1 is inserted into the small hole 8 of the terminal board 5 and soldered to the copper foil 9, the gap between the lead wire 7 and the small hole 8 is sealed by solder. Further, an output lead wire 15 connected to an output terminal (not shown) is soldered to the remaining portion of the copper foil 9.

In the above embodiment, the terminal plate 5 is used only to relay the output lead wire 15, but if the screw 2 is electrically connected to the magnetic circuit of the microphone unit 1, The terminal plate 5 can also be provided with a relay function for connecting the magnetic circuit to the case 3.

As described above, in the present invention, the microphone unit 1 is placed on the upper part of the case 3 via the first damper 4, the terminal board 5 is placed on the lower part of the case 3 via the second damper 11, A sealed back cavity 13 is formed between the terminal plate 5 and the microphone unit 1, and the screw 2 protruding from the bottom surface of the microphone unit 1 is inserted into the hole 6 of the terminal plate 5, and the nut 14 is screwed together. unit 1
The lead wires 7 and the output lead wires 15 are soldered to the terminal board 5 and are not fixed or sealed with adhesive, improving reliability and eliminating the need for any stock time for adhesive curing. . In addition, since the terminal board 5 is directly attached to the second damper 11, the back cavity 13 can be sealed and the microphone unit 1 can be floated (floating structure for vibration isolation) at the same time with a minimum number of parts. We can make it happen.

[Brief explanation of the drawing]

1 and 2 are sectional views showing the main parts of a conventional microphone, FIG. 3 is a sectional view showing the main parts of a microphone according to the present invention, and FIG. 4 is a plan view showing the components of the microphone. It is a diagram. 1... Microphone unit, 2... Screw, 3
... Case, 4, 11 ... Damper, 5 ... Terminal board, 6 ... Hole, 7, 15 ... Lead wire, 13 ...
Back Cavity, 14...Natsuto.

Claims (1)

[Scope of utility model registration request] A microphone unit is placed on the top of the case via a first damper, a terminal board is placed at the bottom of the case via a second damper, and a sealed back cavity is provided between the terminal board and the microphone unit. A microphone characterized in that a screw protruding from the bottom surface of the microphone unit is inserted into a hole in a terminal board, a nut is screwed together, and a lead wire of the microphone unit and an output lead wire are soldered to the terminal board.