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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a conventional
microphone device, FIG. 2 is a sectional view showing a microphone device according to one
embodiment of the present invention, and FIG. 3 is another embodiment according to the present
invention. It is a sectional view showing a microphone device. 11
····································································································································································· Electret 17 17
spacer 18 diaphragm 17 ring 20 unit part 21 22 22 cylindrical body , 23 · · · · · · · · · printed
board, 24 · · · unit case, 25 · · · · · · · · · · bent end.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a microphone
device improved to achieve stable unit attachment with a reduced number of parts. Units such as
condenser type microphones using Elec Flet are extremely small 7 2 4! "Phrase 5 ° i one
icrophone has been adopted. As shown in FIG. 1, this type of conventional microphone device is
held by a unit case 6 so that the insulator 1, the damper 2, the insulator 3, the electret 14, and
the diaphragm 5 are integrated, as shown in FIG. The case 6 is attached to the cylindrical outer
case 1. However, in the case of this structure, the unit case 6 and the outer case 1 are separate
□, and since they are simply inserted and held, the unit case 6 can be attached to the outer case l
7 stably. There are disadvantages such as difficulty, high parts count, and complicated assembly
process. (1) The present invention is to improve such a defect, to securely and stably attach as a
unit, to simplify an assembly operation, and to provide a microphone device resistant to
peristalsis. One or more drawings will be fermented and one example of this invention will be
described. As shown in FIG. 3, the unit is incorporated and held in the outer case 11 itself, that is,
the white matter of the large diameter portion J2 of the outer case J1 is insulating> 1+ thing 13,
damper 14, insulator 15, electret 16. Are closely inserted, and a diaphragm 18 is provided on the
electret 16 with a spacer 17 interposed therebetween, and a ring 9 is provided on the periphery
of the other surface of the diaphragm 18. Then, the entire bending unit portion 20 is crimped
and fixed to the inner edge of the outer case 1 via the ring J9. At the narrow end of the outer
case I, a cylinder 2 is used. A printing machine 23 is attached via 22 and used for connection of
lead wires and the like. Since the units such as the electret 16 and the diaphragm 18 are housed
and held in the large diameter portion 12 formed on the outer cylinder J in the microphone
charge configured as described above, a unit case as in the prior art becomes unnecessary. In
addition, since the unit is directly housed and held in the outer case 1, there is no problem of
connection between the unit case and the outer case, and stable holding is always performed. In
addition, since the unit case is unnecessary, the number of parts is reduced accordingly, the
assembly operation is simplified, and the cost is reduced. FIG. 8 shows another embodiment of
the present invention, in which the unit case 24 for housing and holding units such as the
electret 16 and the diaphragm 18 and the outer case 11 are separately provided. Cage and case
1 outside!
At the same time, they are connected with each other and assembled. That is, the end of the outer
case 11 is bent into a cross-sectional L-shape, and the end of the unit case 24 is engaged with the
bent end 25 and bent and crimped. In this way, caulking for holding the electret 16 and the
imaging moving plate 18 and the like in the unit case 24 and caulking for connecting the unit
case 24 and the outer case 11 are simultaneously performed, and the assembly operation is
performed. Be done quickly. On the other hand, since the caulking of the outer case 11 and the
end of the unit case 24 come into engagement, the caulking becomes strong against falling off.
Therefore, the unit case 24 does not come off even if there is vibration, etc., and it is possible to
withstand the movement and the safety. The present invention can be applied not only to
condenser microphones using electrets, but also to microphones of other types. As described
above, according to the present invention, the connection between the holding of units such as
electrets and moving plates and the outer cylinder It is possible to provide a microphone device
that can ensure that the above can be performed firmly and firmly.