JP2007214840A - Microphone device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a microphone device in which touch noise can be reduced. <P>SOLUTION: The microphone unit is provided with a cylindrical grip 3, a microphone unit 5 with a diaphragm and a unit holder 7 holding the microphone unit 5. A back support plate 45 is arranged at the back side of the unit holder 7 and composed of a flexible member to support the unit holder 7. A fin 61 being a projecting contact member projects from the unit holder 7 toward the back support plate 45 to come in contact with the back support plate at a projecting side face. Contact resistance reduces rolling and pitching of the microphone unit 5 which cause touch noise. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a microphone device with reduced touch noise.

  Conventionally, a hand-type microphone device having a microphone unit on a cylindrical grip has been used for various applications. In this type of microphone device, reduction of touch noise is an important theme. Touch noise is noise caused by vibration when holding a grip with a hand. As a touch noise reduction structure, two types of structures, a floating type and a cancellation type, are known.

  8 and 9 show an example of a floating type microphone device. The microphone device 101 includes a grip 103, a microphone unit 105, and a unit holder 107 that holds the microphone unit 105. The microphone unit 105 protrudes from the upper end of the grip and is covered with a net (not shown). The microphone unit 105 has a built-in diaphragm, and the vibration of the diaphragm corresponding to the sound pressure is converted into an electric signal.

  The inside of the unit holder 107 is a cavity. The unit holder 107 is accommodated in the grip 103 while being supported by the cushion ring 111, the sealing ring 113, and the back support plate 115. The cushion ring 111 and the sealing ring 113 are made of solvosen and surround the upper and lower portions of the unit holder 107, respectively. The back support plate 115 is made of rubber, is located further below the sealing ring 113, and supports the lower convex portion of the unit holder 107. Touch noise is reduced by the vibration isolation effect of the cushion ring 111, the sealing ring 113, and the back support plate 115.

  As in this example, the floating type microphone device supports the microphone unit by a floating structure using a member that is difficult to transmit vibration. Floating type microphone devices are generally popular because they can obtain a touch noise reduction effect relatively easily.

  FIG. 10 shows a cancel type microphone device. In FIG. 9, the lower end portion of the unit holder 107 is closed, and the periphery of the lower end portion is surrounded by a sealing ring 113. On the other hand, in the microphone device 121 of FIG. 10, the lower end portion of the unit holder 123 is open, and the sealing plate 125 is attached to the lower end portion. The sealing plate 125 is provided with a plurality of through holes 127, and the internal space of the unit holder 123 is connected to the lower grip internal space. When the diaphragm moves due to the vibration of hitting the grip 103, pressure is simultaneously generated in the back chamber of the diaphragm, and this pressure acts on the diaphragm. The inertial force of the diaphragm is offset by the pressure in the back air chamber, thereby reducing touch noise.

  As in this example, the cancel type microphone device reduces the touch noise by canceling the vibration of the noise factor with the pressure of the back air chamber. The cancellation type microphone device is theoretically superior because it reduces vibration itself. Further, in the cancel type microphone device, the internal space of the unit holder 123 communicates with the grip internal space, and thus the space volume on the back side of the diaphragm is large. Since the substantial cavity size on the back side can be increased, the sound quality in the low frequency range can be improved, which is advantageous in terms of microphone performance.

As a conventional document, a floating type microphone device is disclosed in Patent Document 1, for example. A cancel type microphone device is disclosed in Non-Patent Document 1, for example.
JP-A-5-244678 (FIG. 1 etc.) Takeko et al. “Analysis of Touch Noise of Vocal Dynamic Microphone”, Proceedings of the Acoustical Society of Japan, October 1993, p. 539-540

  However, in the conventional microphone device, although the touch noise can be reduced by the above-described floating type or cancel type structure, there is a problem that further noise reduction is necessary to meet the high demand for performance improvement.

  In particular, in the cancel type microphone device, many parameter elements such as accuracy of components and built-in form are involved in the noise reduction effect, and high accuracy of these various parameter elements is required. For this reason, even if the cancellation type microphone device is theoretically excellent, it is not easy to obtain a satisfactory noise reduction effect even in mass production. Therefore, it is desired to improve the noise reduction effect of the cancel type microphone device.

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide a microphone device that can reduce touch noise.

  The microphone device of the present invention is configured by a flexible member that is disposed on the back side of the unit holder, a microphone holder having a cylindrical grip, a diaphragm, a unit holder that holds the microphone unit, and the unit holder. A rear support member that supports the unit holder, and a projecting contact member that projects from the unit holder toward the rear support member and contacts the rear support member at a projecting side surface.

  With this configuration, the protruding side surface of the protruding contact member comes into contact with the back support member to generate a contact resistance, and this contact resistance reduces the rolling and pitching of the microphone unit that causes the touch noise, and thus the touch noise is reduced. .

  In addition, the microphone device of the present invention includes a contact pressure adjusting mechanism that adjusts the contact pressure of the protruding contact member to the back support member. With this configuration, the touch noise can be further reduced by adjusting the contact pressure without replacing parts after the microphone device is assembled. Even in a cancellation type microphone device that is affected by parameter elements such as various component accuracy, a noise reduction effect can be effectively obtained by adjusting the contact pressure.

  In the microphone device of the present invention, the contact pressure adjusting mechanism is a mechanism for adjusting a fixed position of the unit holder in the rotation direction in the grip. With this configuration, the unit holder can be rotated to adjust the contact pressure at which the protruding contact member comes into contact with the flexible back support member in the rotation direction. The contact pressure can be adjusted by a simple operation of rotating the unit holder.

  In the microphone device of the present invention, a plurality of protruding contact members are arranged at equal intervals in the circumferential direction. With this configuration, rolling and pitching of the microphone unit can be effectively suppressed, and touch noise can be reduced.

  In the microphone device of the present invention, the protruding contact member has a groove in a portion in contact with the back support member. With this configuration, it is possible to reduce the change in contact resistance with time.

  In the microphone device of the present invention, the protruding contact member is provided obliquely with respect to the central axis of the microphone unit. With this configuration, rolling and pitching of the microphone unit can be effectively suppressed, and touch noise can be reduced.

  In the microphone device of the present invention, the protruding contact member is inclined in the radial direction with respect to the central axis. Typically, the back support member side end is separated from the central axis to the outside from the unit holder side end. With this configuration, rolling and pitching of the microphone unit can be effectively suppressed, and touch noise can be reduced.

  In the microphone device of the present invention, the protruding contact member is inclined in a direction intersecting with the radial direction with respect to the central axis. With this configuration, rolling and pitching of the microphone unit can be effectively suppressed, and touch noise can be reduced.

  The present invention reduces the rolling and pitching of the microphone unit by the action of contact resistance by providing a protruding contact member that protrudes from the unit holder toward the back support member and contacts the back support member at the protruding side surface. A microphone device having an effect that touch noise can be reduced can be provided.

  Hereinafter, a microphone device according to an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, the microphone device is a cancel type dynamic microphone.

  1 and 2 show a microphone device according to a first embodiment of the present invention. In the figure, the microphone device 1 includes a grip 3 that is a cylindrical housing, a microphone unit 5, and a unit holder 7 that holds the microphone unit 5. The unit holder 7 is housed in the grip 3 and holds the microphone unit 5 at a position protruding from the upper end of the grip 3. The microphone unit 5 is covered with a net 9 and a filter 11 inside thereof.

  In the following description, the side of the net 9 in the microphone device 1 is referred to as “upper”, and the side opposite to the net 9 is referred to as “lower”.

  The grip 3 includes a lower main grip 13 and an upper relay grip 15, and the main grip 13 and the relay grip 15 are coupled by a screw structure. The relay grip is made of brass.

  The microphone unit 5 includes a diaphragm, and converts the vertical vibration (vertical vibration) of the diaphragm into an electrical signal. More specifically, a coil is fixed to the diaphragm, and there is a magnetic field around the coil. When the diaphragm vibrates, the coil crosses the magnetic field lines, and the electromotive force of the coil becomes an audio electrical signal. The internal structure of the microphone unit 5 is not shown in FIG.

  The unit holder 7 is made of aluminum or brass. The unit holder 7 includes a holder tube portion 21 and a holder bottom plate 23, and the holder bottom plate 23 is coupled to the lower end of the holder tube portion 21 by a screw structure, whereby the unit holder 7 has a cup shape. The inside of the unit holder 7 is a cavity.

  The unit holder 7 is coupled to the microphone unit 5 by screws 25. The plate 27 is in contact with the lower surface of the convex portion 29 provided on the inner surface of the unit holder 7, and the screw 25 is passed through the hole of the plate 27 and tightened into the screw hole provided in the central protrusion of the microphone unit 5. It has been.

  Next, a structure for supporting the unit holder 7 in the grip 3 will be described. First, the outer surface of the cylindrical portion of the unit holder 7 is surrounded by an upper cushion ring 31, a central side cushion 33 and a lower sealing ring 35. The cushion ring 31 and the sealing ring 35 are made of solvocene, and the side cushion 33 is made of butyl rubber. The cylinder portion of the unit holder 7 is supported by the cushion ring 31, the side cushion 33, and the sealing ring 35, and is held by the relay grip 15 of the grip 3, thereby obtaining an anti-vibration effect. Further, the sealing ring 35 prevents air leakage.

  Further, a rod-shaped central leg portion 41 projects downward from the center portion of the holder bottom plate 23. The central leg 41 is fitted with a collar 43 of a baking material. Further, a back support plate 45 made of butyl rubber is fitted to the central leg 41 from below the collar 43. Further, a presser nut 47 is fastened to the external thread portion of the outer surface of the center leg 41 from below the back support plate 45, whereby the center portion of the back support plate 45 is fixed to the unit holder 7. .

  The edge portion of the back support plate portion 41 is in contact with the lower surface of the convex portion 49 provided on the lower inner surface of the relay grip 15. A brass presser ring 51 is fixed to the inner surface of the relay grip 15 under the back support plate 45. The presser ring 51 is screwed into the relay grip 15 using the external thread of the outer periphery of the presser ring 51 and the internal thread of the relay grip 15, whereby the edge of the back support plate 45 is attached to the relay grip 15. It is fixed.

  A rubber plate 53 is disposed below the presser nut 47 and the presser ring 51, and an aluminum board base 55 is screwed into the unit holder 7 from below the rubber plate 53. The substrate base 55 is fastened to the central leg 41 by using the central hole of the substrate base 55 and the external thread of the central leg 41, whereby the rubber plate 53 is pressed and the press ring 49 is stopped. And the microphone unit 5 is prevented from jumping out. A substrate 57 is attached to the substrate base 55 using screws 56.

  In the above configuration, the unit holder 7 and the microphone unit 5 are supported in a non-contact state away from the wall surface of the grip 3 by the back support plate 45, the cushion ring 31, the side cushion 33, and the sealing ring 35. Further, the internal space of the unit holder 7 communicates with the lower grip internal space, thereby realizing a cancel type structure. Due to this communication structure, the holder bottom plate 23 is provided with a through hole (not shown), and the back support plate 45 is also provided with a through hole 46 (FIG. 2).

  Further, the lead wire 58 of the microphone unit 5 passes through the inside of the unit holder 7, passes through the inside of the central leg portion 41, and is connected to the board base 55.

  Next, the protruding contact member characteristic of the present embodiment will be described. In the present embodiment, the fins 61 in FIGS. 1 and 2 correspond to protruding contact members. In the present embodiment, since the pitching reduction fins found in ships and the like are applied, the expression fins is used. As shown in the figure, two fins 61 protrude from the unit holder 7 toward the back support plate 45. The two fins 61 are disposed on opposite sides of the central axis of the unit holder 7. The fin 61 is a rod-shaped member having a circular cross section. The fins 61 have greater rigidity than the back support plate 45, and are made of a material that realizes such rigidity. The fins 61 are typically made of metal, and in the present embodiment, the fins 61 are made of brass.

  The upper end of the fin 61 is fixed to the holder bottom plate 13 by a screw structure including an external thread of the fin 61 and a female screw hole of the holder bottom plate 13. The lower portion of the fin 61 passes through a fin receiving hole 63 in the cylinder direction (vertical direction) provided on the rubber back support plate 45, and the lower end of the fin 61 protrudes from the lower surface of the back support plate 45. The protruding side surface of the fin 61 (the outer surface of the protruding portion) is in contact with the inner surface of the fin receiving hole 63. The inner surface of the fin receiving hole 63 is a fin contact surface 65 that contacts the fin 61.

  The configuration of the microphone device 1 according to the present embodiment has been described above. Next, an operation for reducing touch noise in the microphone device 1 will be described.

  The microphone device 1 of the present embodiment is a cancel type, and when vibration that causes touch noise occurs, this vibration is transmitted to the diaphragm of the microphone unit 5 and at the same time, pressure is generated in the back air chamber of the diaphragm, This pressure cancels the inertial force of the diaphragm, reducing touch noise. In the present embodiment, in particular, the rolling and pitching of the microphone unit 5 in which the fins 61 cause the touch noise can be reduced, thereby reducing the touch noise. Hereinafter, noise reduction by the fins 61 will be described in detail.

  First, the mechanism of touch noise will be described in relation to the rolling and pitching of the microphone unit 5. Touch noise occurs, for example, when a microphone is held back by hand or when the microphone is rubbed with a hand. Also, with a corded microphone, touch noise is also generated when the microphone cord is suspended or hit against an object. At this time, the microphone unit 5 undergoes rolling and pitching as indicated by arrows X and Y in FIG. Rolling and pitching means swinging in the front-rear direction and the left-right direction with respect to the vertical axis. The components of rolling and pitching force include a parallel component (lateral vibration) and a right-angle component (longitudinal vibration). A right-angle component (longitudinal vibration) appears as an electric signal of the microphone unit 5 and becomes noise.

The microphone device 1 according to the present embodiment can reduce the touch noise.
In the present embodiment, the two fins 61 extend from the unit holder 7 to the back support plate 45 and are in contact with the fin contact surface 65 of the back support plate 45 on the protruding side surface, thereby generating contact resistance. . The contact resistance is a resistance caused by the contact, and is a resistance to movement in the direction along the outer surface of the fin 61 (in the present embodiment, the vertical direction). This contact resistance reduces the rolling and pitching of the microphone unit 5 that cause the touch noise, and thus the touch noise is reduced.

  In the rolling and pitching reducing action described above, the fins 61 function in the same manner as the fins attached to the hull to reduce pitching in ships and the like. Therefore, in the present embodiment, the expression fin 61 is used. However, unlike the ship fins utilizing the resistance of water, the fins 61 utilize the contact of the back support plate with the rubber material. Therefore, the fin 61 does not need to have a thin shape like a ship fin. The fin 61 only needs to have a shape capable of generating contact resistance that reduces rolling and pitching, and the cross-sectional shape of the fin 61 is not limited. As in the present embodiment, the fin 61 may have a circular cross section.

  Next, a contact pressure adjusting mechanism that adjusts the contact pressure between the fin 65 and the back support plate 45 will be described. In the present embodiment, the microphone unit 5, the unit holder 7, the board base 55, and the fins 61 are integrated into the relay grip 15. Accordingly, these components can be integrally rotated with respect to the relay grip 15 (arrow A in FIG. 2). This rotatable structure makes it possible to adjust the fixed position in the rotation direction of the unit holder 7 in the relay grip 15. Such a rotating structure of the unit holder 7 corresponds to a contact pressure adjusting mechanism. As shown in FIG. 3, when the fin 61 rotates together with the unit holder 7 or the like, the back support plate 45 is fixed to the relay grip 15, and thereby the contact pressure between the fin 61 and the fin contact surface 65. Is adjusted.

  The contact pressure can be adjusted after assembly of the microphone device 1 as described below. When adjusting the contact pressure, the microphone unit 5 is rotated in the direction of arrow A in FIG. 2 with the net 9 removed. The microphone unit 5 may be turned manually by an operator. When the microphone unit 5 is rotated, the unit holder 7 and the fin 61 rotate together with the microphone unit 5, and the fin 61 is pressed against the fin receiving hole 63 of the back support plate 45 as shown in FIG. As a result, the contact pressure between the fin 61 and the fin contact surface 65 changes. Since the back support plate 45 is soft, the microphone unit 5, the unit holder 7, and the fins 61 are held by a frictional force at a position when the hand is released from the microphone unit 5. Then the net 9 is attached again.

  The adjustment operation of the contact pressure may be performed as follows. First, touch noise is inspected. For example, when the grip 3 is hit with the thumb, a noise sound is observed. When noise noise is generated, the microphone unit 5 is turned left and right with the net 9 removed as described above, and the contact pressure is adjusted. The position adjustment of the microphone unit 5 is repeated so that the noise is sufficiently reduced. This adjustment may be performed when the assembly of the microphone device 1 is completed. Further, when the microphone device 1 is actually used and the touch noise increases with time, adjustment work may be performed for maintenance.

  The contact pressure adjusting mechanism is particularly advantageous in the cancellation type microphone device 1 as in the present embodiment. Hereinafter, this point will be described.

  As described above, the cancel type structure is a structure that obtains a vibration reduction effect by canceling the vibration of the diaphragm with the air pressure in the grip. This cancellation type is theoretically superior because it reduces vibration itself. In the cancel type, the unit holder internal space communicates with the grip internal space. Therefore, the space volume on the back side of the diaphragm is large, the sound quality in the low frequency range can be improved, and the microphone performance is advantageous.

  On the other hand, in the cancellation type, many parameter elements such as the accuracy of various components and the form of incorporation are involved in the noise reduction effect, and high accuracy of these various parameter elements is required. In order to meet such a demand with the prior art, it is necessary to perform an inspection after the assembly of the microphone is completed, and to perform a re-inspection after replacing parts if necessary. However, such work takes a lot of work, and for that reason, it has been difficult to obtain a noise reduction effect that is satisfactory in mass production.

  This embodiment can solve the problem of the cancellation type as described above. In the present embodiment, the contact pressure of the fin 61 can be adjusted to reduce the rolling and pitching of the microphone unit 5. As a result, this adjustment operation is an operation for absorbing the influence of variations of various cancel-type parameter elements by adjusting the contact pressure. In addition, this adjustment operation can be easily performed after the assembly of the microphone by the above simple operation without replacing parts. Therefore, the present embodiment can solve the problems of the cancel type microphone device and facilitate mass production.

  The microphone device 1 according to the first embodiment of the present invention has been described above. According to the present embodiment, by providing the projecting contact member that extends from the unit holder 7 toward the back support member and contacts the back support member at the projecting side surface, the microphone unit 5 can be rolled by the action of contact resistance. In addition, touch noise can be reduced by reducing pitching.

  The present embodiment has a simple configuration in which a projecting contact member is added to the conventional microphone device, and the touch noise can be greatly reduced using the fin principle, which is advantageous in this respect.

  In addition, the microphone device 1 of the present embodiment includes a contact pressure adjusting mechanism that adjusts the contact pressure of the protruding contact member to the back support member. Thereby, after assembling the microphone device 1, it is possible to further reduce touch noise by adjusting the contact pressure without replacing parts or the like. Even in the cancellation type microphone device 1 in which parameter elements such as various component accuracy affect, a noise reduction effect can be effectively obtained by adjusting the contact pressure.

  In the microphone device 1 of the present embodiment, the contact pressure adjusting mechanism is a mechanism that adjusts the fixed position of the unit holder 7 in the rotation direction in the grip 3. Therefore, the configuration of the adjustment mechanism may be simple, and the contact pressure can be adjusted by a simple operation of rotating the unit holder.

  In the present embodiment, the plurality of protruding contact members are arranged at equal intervals in the circumferential direction. In the above example, the two fins 61 are arranged 180 degrees apart. With such a configuration, rolling and pitching of the microphone unit 5 can be effectively suppressed, and touch noise can be reduced.

  The above embodiments can be modified by those skilled in the art within the scope of the present invention. For example, in this embodiment, the cancellation type microphone device has been mainly described. However, the present invention may be applied to other types of microphone devices and may be applied to floating type microphone devices. Even in the floating type, the above contact pressure adjusting function can absorb the influence of variations of parts and the like without performing troublesome work such as replacement of parts, and works favorably for noise reduction.

  Further, the microphone unit 5 and the unit holder 7 may be integrated. Further, the microphone unit 5 may be supported only by the fins that are projecting contact members, and in this case, the back surface support member does not have to be fixed to the central leg.

  Next, another embodiment of the present invention will be described. In the following embodiments, description of matters similar to those of the above-described embodiments will be omitted.

  FIG. 4 shows a microphone device 71 according to the second embodiment of the present invention. In the present embodiment, four fins 73 are provided. The four fins 73 are arranged at equal intervals every 90 degrees along a circle centered on the central axis of the microphone unit 5.

  According to the present embodiment, since the number of protruding contact members is increased, vibration factors in more directions can be reduced and touch noise can be further reduced.

  Within the scope of the present invention, the number of protruding contact members is arbitrary and is not limited to the above four or two. For example, the number of protruding contact members may be 3, or 5 or more. When there are three protruding contact members, they are preferably arranged so as to form equilateral triangles at intervals of 120 degrees.

  FIG. 5 shows a microphone device 75 according to a third embodiment of the present invention. In the present embodiment, a groove 79 is provided on the outer surface of the fin 77.

  In the present embodiment, the groove 79 is a screw groove. Specifically, the fin 77 may be a bolt. The male screw under the bolt is fastened to the holder bottom plate 23 of the unit holder 7. The male screw at the tip of the bolt comes into contact with the fin contact surface 65 of the fin receiving hole 63 of the back support plate 45.

  In the present embodiment, since the groove is provided on the outer surface of the protruding contact member, the protruding contact member bites into the fin contact surface of the back support member. Thereby, the change of the contact resistance with time can be reduced. A constant noise reduction effect can be obtained over a long period of time.

  In the present embodiment, the fin 77 is a bolt, and the groove 79 is provided on the entire outer surface of the fin 77. However, the groove 79 may not be provided in the entire fin 77. It suffices to be provided at least at a portion where the fin 77 and the back support plate 45 are in contact with each other.

  In the present embodiment, the number of fins 77 is four, but it is needless to say that the number of fins is not limited. The number of fins may be two as in the above-described embodiment.

  FIG. 6 shows a microphone device 81 according to a fourth embodiment of the present invention. In the present embodiment, the two fins 83 are provided obliquely with respect to the central axis of the microphone unit 5 (the vertical direction of the grip 3). Specifically, the fin 83 is inclined in the radial direction with respect to the central axis. The radial direction is a direction from the central axis toward the grip wall. And the edge part by the side of the back support plate 45 of the fin 83 is separated outside from the central axis rather than the edge part by the side of the unit holder 7. FIG. A suitable inclination angle of the fin 83 is 3 to 15 degrees, and more preferably 5 to 10 degrees. In the example of the present embodiment, the inclination angle is 5 degrees. Also in this embodiment, the fin 83 is provided with a screw groove.

  In the present embodiment, the contact length between the fin 83 and the back support plate 45 can be increased by inclining the fin 83. Further, by inclining the fin 83, it is possible to cause contact resistance to act in an appropriate direction opposite to the rolling and pitching swinging directions. Therefore, the effect of suppressing rolling and pitching can be improved.

  Thus, according to the present embodiment, rolling and pitching of the microphone unit can be effectively suppressed, and touch noise can be reduced.

  FIG. 7 shows a microphone device 85 according to a fifth embodiment of the present invention. Also in the present embodiment, the two fins 87 are provided obliquely with respect to the central axis of the microphone unit 5 (the vertical direction of the grip 3). However, unlike the embodiment of FIG. 6, in the present embodiment, the fins 87 are inclined in the circumferential direction with respect to the central axis. The circumferential direction is a tangential direction of the circle with the central axis as the center, and is a direction that intersects (orthogonally) the radial direction described in the embodiment of FIG. Further, as shown in the figure, the two fins 87 are inclined in opposite directions. When a plane passing through the central axis and the upper end fixing point of the fin 87 is used as a reference, an appropriate inclination angle of the fin 87 is 3 to 15 degrees, and more preferably 5 to 10 degrees. In the example of the present embodiment, the inclination angle is 5 degrees. Also in the present embodiment, the fins 87 are provided with screw grooves.

  In the present embodiment, the contact length between the fin 87 and the back support plate 45 can be increased by inclining the fin 87. Further, by inclining the fins 87, it is possible to cause contact resistance to act in an appropriate direction opposite to the rolling and pitching swinging directions. Therefore, the effect of suppressing rolling and pitching can be improved.

  Thus, according to the present embodiment, rolling and pitching of the microphone unit can be effectively suppressed, and touch noise can be reduced.

  6 and 7 may be combined. In this case, the protruding contact member is inclined in the radial direction and in a direction intersecting with the radial direction. Due to the inclination in both directions, the fin has a twisted relationship with the central axis of the microphone unit. A further noise reduction effect can be expected by the inclination in both directions.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and it goes without saying that those skilled in the art can modify the above-described embodiments within the scope of the present invention.

  As described above, the microphone device according to the present invention has an effect of reducing touch noise and is useful as a wireless dynamic microphone or the like.

Sectional drawing of the microphone apparatus in the 1st Embodiment of this invention The perspective view of the microphone apparatus in the 1st Embodiment of this invention The figure which shows the adjustment method of fin contact pressure The perspective view of the microphone apparatus in the 2nd Embodiment of this invention. The perspective view of the microphone apparatus in the 3rd Embodiment of this invention The perspective view of the microphone apparatus in the 4th Embodiment of this invention The perspective view of the microphone apparatus in the 5th Embodiment of this invention The figure which shows the conventional microphone device A diagram showing a conventional floating microphone device The figure which shows the conventional cancellation type microphone device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Microphone apparatus 3 Grip 5 Microphone unit 7 Unit holder 9 Net 11 Filter 31 Cushion ring 33 Side cushion 35 Sealing ring 41 Center leg part 45 Back support plate 61 Fin 63 Fin receiving hole 65 Fin contact surface

Claims (8)

A cylindrical grip,
A microphone unit equipped with a diaphragm,
A unit holder for holding the microphone unit;
A back support member that is disposed on the back side of the unit holder, is configured by a flexible member, and supports the unit holder;
A protruding contact member that protrudes from the unit holder toward the back surface support member and contacts the back surface support member at a protruding side surface;
A microphone device comprising:   The microphone device according to claim 1, further comprising a contact pressure adjusting mechanism that adjusts a contact pressure of the protruding contact member to the back support member.   The microphone device according to claim 2, wherein the contact pressure adjusting mechanism is a mechanism for adjusting a fixed position of the unit holder in the rotation direction in the grip.   4. The microphone device according to claim 1, wherein the plurality of protruding contact members are arranged at equal intervals in the circumferential direction.   The microphone device according to any one of claims 1 to 4, wherein the protruding contact member has a groove in a portion in contact with the back support member.   6. The microphone device according to claim 1, wherein the protruding contact member is provided obliquely with respect to a central axis of the microphone unit.   The microphone device according to claim 6, wherein the protruding contact member is inclined in a radial direction with respect to the central axis.   The microphone device according to claim 6, wherein the protruding contact member is inclined with respect to the central axis in a direction intersecting with a radial direction.

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