JP2506693Y2 - Microphone holding structure in tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a microphone holding structure for mounting a microphone on the side of a tape recorder housing in a tape recorder having a built-in microphone.

[Outline of the Invention] The structure for holding a microphone in a tape recorder according to the present invention is configured such that the microphone body is held by a cushion plate with respect to the microphone cabinet and the microphone cabinet is attached to the tape recorder housing side through a part of the cushion plate. As a result, the microphone cabinet is isolated from the tape recorder case side, and the microphone body is isolated from the microphone cabinet side, and the microphone body is divided into two stages with respect to the tape recorder case side. The vibration noise to the microphone body is almost completely cut off to enable clear recording, and the simple structure using only one cushion plate can reduce the cost. Is .

[Prior Art] Conventionally, a tape recorder, in particular, a portable tape recorder has a built-in microphone so that recording can be easily performed.

As shown in FIG. 3, the tape recorder with a built-in microphone is configured by disposing a microphone section (3) on a lid body (2) of a tape recorder housing (1), and the microphone section (3) is a fourth unit. A motor of a tape drive mechanism in which the microphone body (4) is transmitted to the lid body (2) as shown in the figure,
A microphone cabinet (6) which is attached to the lid body (2) by a cushion plate (5) formed of a rubber material so as not to pick up vibration due to rotation of the gear and protects the microphone body (4), and its front side. The sound-transmitting panel (7) is also formed by interposing a cushion plate (5) between the cover plate (2) and the cushion plate (5) in a laminated manner so as to prevent vibration from being transmitted, and tightened and fixed by a biz (8).

The inner surface side of the microphone portion (3), that is, the rear surface side of the microphone body (4) is provided inside the lid body (2) in order to block vibration noise of the tape in the tape cassette C and drive noise of the motor and gears. It is sealed by the part (2a).

[Problems to be solved by the device]

In the tape recorder with a built-in microphone configured as described above, the microphone unit (3) has a wall portion for blocking and protecting noise on the back side of the microphone body (4) integrated with the lid body (2), that is, the lid body. Since it is formed by the inner part (2a) of (2), the inner part (2a) of the lid (2) vibrates due to the rotation of the motor, gears, etc., and the sound generated by this vibration produces the sound generated by the microphone body. There is a problem that (4) is picked up and recorded as noise.

Further, the microphone cabinet (6) also has a lid (2).
Since the cushion plate (5) is sandwiched between and fastened by the screw (8), the cushion plate (5) is compressed by the tightening strength and becomes a rigid state, and the vibration of the lid (2) directly occurs. It may be transmitted and generate noise.

The present invention has been made in view of the above point, and provides a microphone holding mechanism for a tape recorder that holds not only the microphone body but also the microphone cabinet in a state of being separated from the tape recorder housing side so that vibration from the housing side is blocked. The purpose is to do.

[Means for solving the problem]

In order to achieve the above object, the microphone holding structure according to the present invention holds the microphone body with respect to the microphone cabinet by a cushion plate and attaches the microphone cabinet to the housing side of the tape recorder through a part of the cushion plate. It was done.

[Action]

With this configuration, the microphone body is held in a suspended state by the cushion plate in the microphone cabinet, and the microphone cabinet is also supported by the cushion plate in a suspended manner with respect to the housing side of the tape recorder. Vibrations from the body side are absorbed by the cushion plate and are not transmitted to the microphone body as well as the microphone cabinet, and noise is reduced due to the vibration isolation of the microphone cabinet, so that the microphone body can clearly record.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. This embodiment is also a case where a microphone portion is arranged on the lid of the tape recorder housing.

In this example, the lid body (11) of the tape recorder housing is
A window hole (13) is formed at a position where the microphone portion (12) is arranged, and a projecting edge portion (13a) (having a required height) is formed on a peripheral edge of the window hole (13) facing the diagonal direction. 13b) is formed, and the protrusions (13a ₁ ) and (13b ₁ ) are provided on this end face.

On the other hand, the microphone section (12) is
4) is held by a cushion plate (15) made of elastic material such as rubber, and the outer peripheral shape is smaller than the window hole (13) of the lid (11) described above, and sound is transmitted to the front side. Stored in a microphone cabinet (19) consisting of a cabinet body (16) to which a panel (17) is fixed, and a rear lid (18) fixed to the rear edge (16a) of the cabinet body (16). It is protected and configured.

That is, in this structure, the cushion plate (15) has the notch (15b) formed around the holding portion (15a) of the microphone body (4) so that the holding portion (15a) can swing with respect to the peripheral surface. In addition, the outer peripheral shape is formed to be substantially the same as the rear side edge portion (16a) of the cabinet body (16), and the support piece portion (15
c) and (15d) are integrally projected, and engaging projecting pieces (15e) and (15f) are projectingly provided on the other opposing sides, and further, supporting portions (15c) and (15d). Through holes (15g) and (15h) are formed in the through holes (15g) and (15h), and through holes (15
i), (15j), and the engaging holes (15
k) are drilled respectively.

Also, the rear edge (16a) of the cabinet body (16)
The cushion plate (1
The protrusions (16b) and (16c) having a height substantially equal to the thickness of (5) are provided in a protruding manner, and the engaging protrusions (16d) are provided in other portions, and the protrusions (16b) and (16c) are provided. ) Has an axial hole (16b ₁ ),
(16c ₁ ) is drilled, and recesses (16b ₂ ) and (16c ₂ ) are formed on the end face.
Are formed.

Rear cover (1) fixed to this cabinet body (16)
The support piece (1) of the cushion plate (15) is
5c) and (15d) are provided with a projecting piece (18a) integrally projecting at a site different from that of the cabinet body (16).
6c) through holes (16b ₁ ) and (16c ₁ )
b) and (18c) are bored, and these through holes (18b) and (1
8c) has a protrusion (16b), a recess (16b ₂ ) on the end face of (16c), and a protrusion (18b ₁ ), (18c ₁ ) that fits into the recess (16c ₂ ) of the end face of (16c).
And an engagement hole (18d) that engages with the engagement protrusion (16d) of the cabinet body (16).

Cushion plate (15) formed as described above
With the microphone body (14) fitted and held in the holding portion (15a), the rear edge portion (16) of the cabinet body (16).
The microphone body (14) is made to correspond to (a) and the through holes (15i) and (15j) are fitted to the protrusions (16b) and (16d) and the engagement hole (15k) is engaged to the a). Engage and position the child (16d) to join. In this state, the rear cover (18) is placed on the rear side of the cushion plate (15) and the through hole (18
b), (18c) through the through hole (15
i), (15j), the protrusions (18b ₁ ), (18b) corresponding to the protrusions (16b), (16c) of the cabinet body (16).
c ₁ ) the projection (16b), the recess (16b ₂ ) of (16c), (16c ₂ )
And the engaging hole (18d) is engaged with the engaging protrusion (16d) projecting from the cushion plate (15) for positioning.

Then, screws (20) and (20) are fitted through the through holes (18b) and (18c) of the rear wall (18) to the protrusion (16) of the cabinet body (16).
The microphone body (14) is retained by the cushion plate (15) by screwing it into the shaft holes (16b ₁ ) and (16c ₁ ) of b) and (16c) and tightening it. (18), that is, by being enclosed and held in the microphone cabinet (19), the microphone section (12)
Is configured.

The microphone part (12) configured in this way is attached to the window hole (13) formed in the lid (11) of the tape recorder housing. That is, the microphone cabinet (19) is inserted with the sound-transmitting panel (17) side of the cabinet main body (16) as the front face with a gap from the entire peripheral face, and from the peripheral face of the cabinet main body (16). The supporting piece portions (15c) and (15d) of the protruding cushion plate (15) are brought into contact with the projecting edge portions (13a) and (13b) of the inner peripheral edge of the window hole (13) and the engaging hole (15g), (15h) is press-fitted to the protrusions (13a ₁ ) and (13b ₁ ).

In this state, by fixing the inner surface plate member, in this example, the cassette holder (21) to the inner surface side of the lid body (11), the supporting piece portions (15c), (1) of the cushion plate (15),
5d) is clamped and fixed between the lid (11) and the cassette holder (21), and the microphone part (12) is attached to the lid (11).

As described above, in this example, the microphone body (1
4) is suspended from the microphone cabinet (19) by the cushion plate (15), and the microphone cabinet (19) is attached to the lid (11) of the tape recorder housing with the other cushion plate (15). , That is, the supporting pieces (15c) and (15d) are supported in a suspended manner, so that the vibration of the drive mechanism motor and gears transmitted to the lid (11) due to the rotation of the microphone cabinet (1).
When it is transmitted to 9), it is absorbed and attenuated by the cushion plate (15), and the vibration noise generated by the vibration of the microphone cabinet (19) is reduced. Further, when the vibration transmitted to the microphone cabinet (19) is transmitted to the microphone body (14), it is attenuated by the cushion plate (15). Therefore, the microphone body (14) is located on the side of the box by the drive mechanism. It is almost unaffected by the vibration noise generated by the vibration.

Further, the sound generated inside the tape recorder housing, for example, the noise generated by the sliding sound of the tape in the tape cassette, the sound of the rotation of the motor, the gear, etc., is the rear side of the microphone body (14) on the rear side of the microphone cabinet (19). That is, since it is hermetically sealed by the rear lid (18), it is almost completely shut off, and the microphone body (14) is not affected by this, and the microphone body (14) is the sound-transmitting panel (17) on the front side of the microphone cabinet (19). Only foreign sounds coming in through can be received and clear recording can be performed.

Further, the microphone cabinet (19) is a lid (11).
Even if an attempt is made to unnecessarily project forward from the window hole (13) of the cushion plate (15) against the elasticity of the cushion plate (15), the projecting piece (18a) of the rear lid (18) comes into contact with the inner surface of the lid (11). That will be stopped.

Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, the microphone part (12) can be arranged not only on the lid body (11) of the tape recorder case but also on the case itself as a matter of course, and also on the microphone cabinet (19). The shape and the like can be variously changed according to the configuration of the tape recorder.

[Effect of device]

As described above, according to the present invention, the microphone body is vibration-proofed in two steps with respect to the case body of the tape recorder, so that only the external sound is recorded clearly without being affected by the vibration noise due to the vibration of the case body side. As a result, the reliability is remarkably improved, and since two steps of vibration isolation are performed by one cushion plate, the number of parts is small and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view of an example of a microphone holding structure according to the present invention, FIG. 2 is an exploded perspective view of a microphone part, FIG. 3 is a perspective view of a conventional tape recorder, and FIG. 4 is a part of the microphone part. FIG. In the figure, (11) is a lid, (13) is a window hole, (14) is a microphone body, (15) is a cushion plate, (15c), (1
5d) is a support piece, and (19) is a microphone cabinet.

Claims (1)

(57) [Scope of utility model registration request] 1. In a tape recorder having a built-in microphone, the microphone body is held by a cushion plate with respect to the microphone cabinet, and the microphone cabinet is attached to the case side of the tape recorder via a part of the cushion plate. A microphone holding structure in a tape recorder characterized by the above.