JP2013034098A - Shock mount for microphone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shock mount for microphone that facilitates fine adjustment of a microphone fitting angle, allows fine adjustment as necessary and enables reduction of noise generated during the fine adjustment.SOLUTION: The shock mount for microphone includes: a mount member 210 which receives and holds a microphone body; an arcuate support base 220 which has an internal diameter larger than the external diameter of the mount member; and an elastic cord 230 which is tensed between the support base 220 positioned at an axially intermediate part of the mount member 210 and both axial sides of the mount member 210, and holds the mount member 210 apart from the support base 220. The support base 210 has cuts 226 and 227 that the elastic cord 230 is passed through at a plurality of places, the cuts are at front-rear asymmetrical positions in a peripheral direction of the support base 210 to make the tension of the elastic cord 230 asymmetrical in the front-rear direction, and a tilt of the mount member 210 in the front-rear direction is made adjustable.

Description

  The present invention relates to a shock mount for a microphone, and allows the angle of the microphone to be finely adjusted while maintaining a vibration damping effect.

  For microphones used in broadcast studios and recording studios, shock mounts are used so that vibrations from the floor of a building are transmitted to the microphones and noise is not mixed into the electroacoustic conversion signal. The shock mount is sometimes called a cradle suspension.

  As a shock mount for a microphone, a mount member that receives and holds the microphone body, a support base that is formed in a ring shape with an inner diameter larger than the outer diameter of the mount member, and an elasticity that holds the mount member apart from the support base What has a string is known. The invention described in Patent Document 1 is one of them, and the elastic string is bridged by applying an appropriate tension between the support base located in the axially intermediate portion of the mount member and both axial ends of the mount member. Thus, the mount member is held away from the support base.

  The support base is coupled to a microphone stand, and the microphone stand is placed on a floor such as a studio or a table. When the floor or table vibrates, the vibration is transmitted from the microphone stand to the support base, but the elastic string interposed between the support base and the mount member blocks the transmission of the vibration to the mount member, and the microphone output signal To prevent vibration noise from being mixed.

  The elastic cord used in the conventional shock mount is basically a rubber cord, and the outer surface of the rubber cord is threaded to prevent the rubber cord from deteriorating due to a chemical change over time. An elastic string covered or covered with a stretchable cloth is used. The elastic string is formed in an endless loop shape like a rubber band, and is spanned between both ends in the axial direction of the support base and the mount member at a plurality of, for example, four locations in the circumferential direction of the mount member and the support base.

  As the microphone held by the shock mount, a side entry type in which the sound collection axis is oriented in a direction orthogonal to the central axis of the microphone body is often used. A stationary microphone that is supported by a microphone stand or the like in a studio uses a microphone unit with a large diameter because sound quality is important. Since a microphone having a microphone unit with a large diameter has a sharp directivity in the high sound range, it is desirable that the angle of the sound collection axis with respect to a line connecting the center of the microphone unit and the sound source can be finely adjusted. Further, assuming that the sound source is a human being, for example, a singer, it is desirable to be able to adjust the direction of the sound collection axis in order to avoid collecting wind noise and pop noise caused by human breathing.

  Adjustment of the sound pickup axis direction of the microphone in the conventional shock mount of the microphone has been performed at the coupling portion between the shock mount and the microphone stand. That is, the structure is such that the operation of adjusting the mounting angle of the shock mount with respect to the microphone stand with the tightening screw of the coupling portion loosened and tightening the tightening screw after the adjustment is made. According to the shock mount having such a structure, it is necessary to loosen the tightening screw and then tighten the angle after adjusting the angle. Therefore, fine angle adjustment is difficult. For example, it is difficult for a conventional shock mount structure for a sound source such as an announcer or singer to fine-tune the sound collection axis while monitoring his / her own sound with headphones or the like.

  In addition, when adjusting the mounting angle of the shock mount with respect to the microphone stand, the joint between the microphone stand and the shock mount vibrates or generates abnormal noise, and these vibration and abnormal noise are transmitted to the microphone and output to the microphone. There is a problem that noise is mixed in.

JP 2002-204491 A

  The present invention solves the above-described problems of the prior art, that is, it is easy to finely adjust the microphone mounting angle, and can be finely adjusted whenever necessary, and noise generated during fine adjustment can be reduced. An object is to provide a shock mount for a microphone.

The microphone shock mount according to the present invention is:
A mounting member for receiving and holding the microphone body;
A support base formed in an arc shape having an inner diameter larger than the outer diameter of the mount member;
The mount member is held apart from the support base by being stretched between the support base located at the axially intermediate portion of the mount member and both sides of the mount member in the axial direction. An elastic string,
The support base has a plurality of cutouts through the elastic string at a plurality of locations,
The most important feature is that the notches at the plurality of positions are asymmetrical in the longitudinal direction of the support base so that the tension of the elastic string is asymmetrical in the longitudinal direction and the inclination of the mounting member in the longitudinal direction can be adjusted. And

  In a shock mount for a microphone having a mount member, a support base, and an elastic string, a plurality of notches passing through the elastic string to the support base are set to asymmetrical positions in the circumferential direction of the support base, and the tension of the elastic string is asymmetric in the front and back direction. As a result, the inclination of the mount member in the front-rear direction can be adjusted while holding the microphone.

It is a top view which shows the Example of the shock mount of the microphone which concerns on this invention. It is a partial cross section front view which shows the state which mounted | wore the shock mount which concerns on the said Example with the microphone. It is a partial cross section side view which shows the state which mounted | wore the shock mount which concerns on the said Example with the microphone. It is a partial cross-section exploded front view which shows the state which mounted | wore the shock mount which concerns on the said Example with a microphone. It is a side view which shows the state which attached the microphone to the shock mount which concerns on the said Example, and inclined the shock mount. The elastic string used for the said Example is developed and shown, (a) is a partial cross section top view, (b) is a side view. It is a partial cross section top view which expands and shows the above-mentioned elastic string.

  Embodiments of a microphone shock mount according to the present invention will be described below with reference to the drawings.

  1 to 5, reference numeral 240 indicates a microphone. The shock mount that supports the microphone 240 includes a mount member 210, a support base 220, and an elastic string 230 as main components.

  The mount member 210 is a cylindrical member as a whole, and the outer peripheral surface of the case of the microphone 240 is held by a cylindrical inner peripheral surface. At both ends in the central axis direction (vertical direction in FIGS. 2 and 3) of the mounting member 210, elastic straps 213 are formed at four locations in the circumferential direction as shown in FIG. As shown in FIG. 1, assuming two diametric centerlines that pass through the central axis of the mount member 210 and are orthogonal to each other, the four elastic strap hooks 213 are connected to any of the two centerlines. Even at the target position.

  The elastic strap hook 213 is for inserting the elastic strap 230 formed in a loop shape from the outer peripheral side of the mount member 210 and hooking it on the inner peripheral side, and is formed in a bowl shape facing the inner peripheral side of the mount member 210. Has been. By forming notches 214 on both sides of each elastic strap hook 213, the elastic strap hook 213 is formed in a protruding shape in the central axis direction of the mount member 210. The elastic string 230 is hooked on the elastic string hook 213 by passing the notches 214 on both sides of the elastic string hook 213 from the outside to the inside of the mount member 210 and further toward the outside. The elastic strap hook 213 is formed by retreating from the inner peripheral surface of the mount member 210 outward in the radial direction so that the elastic strap 230 hooked on the elastic strap hook 213 does not protrude largely toward the inner peripheral surface side of the mount member 210. ing.

  The front side of the microphone 240 to be held by the mounting member 210 is the lower side in FIG. The four elastic strap hooks 213 are provided at the above-described positions of the mount member 210, so that they are evenly distributed on the front side and the back side of the microphone 240 and equally on the left and right sides. The mount member 210 is configured to receive the lower half portion of the microphone 240 on the inner peripheral side thereof and hold the microphone 240.

  The support base 220 may basically be formed in a ring shape, but the support base 220 in this embodiment is formed in a partial arc shape with a part of the arc cut away as shown in FIG. Yes. In FIG. 1, reference numeral 228 indicates the cut portion. The cut-out portion 228 corresponds to the front surface of the microphone 240 to be held by the mount member 210, that is, the sound collection surface side. The inner diameter of the arc-shaped support base 220 is sufficiently larger than the outer diameter of the mount member 210, and the mount member 210 is positioned with a sufficiently large space on the inner peripheral side of the support base 220.

  In FIG. 1, the support base 220 has a bilaterally symmetric shape with respect to the center line in the front-rear direction (vertical direction in FIG. 1) by forming the cut portion 228 as described above. The arm 270 protrudes outward in the radial direction from the center in the length direction (circumferential direction) of the support base 20, that is, from the position corresponding to the back surface of the microphone 240 held by the mount member 210. The arm 270 is connected to a connection bracket with a microphone stand (not shown), and the microphone stand supports the shock mount according to the present embodiment.

  The support base 220 has holes 222 that form a pair on the left and right on a line that is perpendicular to the center line in the front-rear direction that divides the support base 220 into left and right and passes through the center point of the arc of the support base 220. The support base 220 is formed radially inward from the outer peripheral surface. In each hole 222, an outer shell member 225 of an elastic string 230, which will be described later, is fitted.

  In the support base 220, the following notches are formed at several locations and symmetrical positions. That is, the notches 226 are formed from the outer peripheral surface of the support base 220 toward the radially inner side at the equidistant positions in the circumferential direction of the support base 220 around the holes 222 into which the outer shell members 225 of the elastic strings 230 are fitted. ing. In addition, the notches 227 are radially inward from the outer peripheral surface of the support base 220 at equidistant positions in the circumferential direction of the support base 220 around the arm 270 and at positions closer to the arm 270 than the notches 226. It is formed towards. The notches 226 and 227 function to relay the elastic string 230 that extends between the upper and lower ends of the mount member 210 and to position the elastic string 230 in the circumferential direction.

  6 and 7 show the configuration of the elastic string 230. As shown in FIGS. 6 and 7, the elastic cord 230 is formed by folding back two elastic cords 230 having the same length and bundling both ends of the two elastic cords 230. doing. Two loop-shaped elastic cords 230 overlap each other, and as shown in FIG. 6B, the end surfaces of the four elastic cords 230 appear on the end surfaces of the binding hardware 231. In this embodiment, two sets of elastic strings 230 integrated in this way are used. The binding metal fittings 231 of the two sets of elastic cords 230 are fitted on the outer shell member 225 as shown in FIGS.

  As shown in FIGS. 2 and 3, the elastic string 230 forming one group is configured such that the binding metal 231 is fitted into the outer shell member 225, and the outer shell member 225 is inserted into the hole 222 of the support base 220 in the radial direction of the support base 220. By being inserted inward, the center of one pair of elastic strings 230 is positioned on the support base 220. As shown in FIGS. 1, 3, and 5, the two elastic strings 230 forming one set are distributed to the front and rear of the mount member 210 and the support base 220 with the hole 22 as a boundary, and the front and rear elastic strings 230 are bridged over elastic straps 213 at both upper and lower ends of the mount member 210. Also, one of the elastic cords 230 distributed back and forth is positioned by way of the notch 226 of the support base 220, and the other of the elastic cords 230 distributed back and forth passes through the notch 227 of the support base 220. It is positioned by doing.

  The other two elastic cords 230 forming one set are also distributed back and forth on the surface opposite to the surface shown in FIG. 3, and are bridged to both ends in the axial direction of the mount member 210 via the support base 220. Has been. One of the two elastic strings 230 distributed back and forth passes through the notch 226 of the support base 220, and the other of the two elastic strings 230 passes through the notch 227 of the support base 220. Therefore, the two sets of elastic cords 230 are spanned symmetrically with respect to a center line (vertical center line in FIG. 1) that bisects the shock mount in the left-right direction. The center line is divided into two asymmetric shapes.

  In this way, two sets of elastic cords 230 forming a pair are arranged on the left and right with the center line in the front-rear direction of the mount member 210 as a boundary, and span across the axial ends of the mount member 210 via the support base 220. An appropriate tension is applied to each elastic string 230. With this configuration, the mount member 210 is elastically supported by being separated from the support base 220 on the inner peripheral side of the support base 220.

  In the illustrated embodiment, a pair of elastic cords 230 is formed by binding both ends of two elastic cords 230 with a binding metal fitting 231, but a central portion in the length direction of one elastic cord 230. And the folded portion and both ends may be bound by a binding member to form a set of elastic cords similar to the set of elastic cords 230 as shown in FIGS. Alternatively, a single elastic string 230 in a loop shape may be overlapped in a single line, the center part in the length direction may be folded back, and the folded part may be bound by a binding member to constitute a set of elastic strings. .

  The lower half of the microphone 240 is a grip portion that can be held by hand, and the mount member 210 receives this grip portion. The outer diameter of the grip portion of the microphone 240 is slightly smaller than the outer diameter of the sound collecting portion, and a step portion 243 is formed between the grip portion and the sound collecting portion. A holding member 250 is fastened with a screw 260 to the lower end surface of the microphone 240 received by the mount member 210. The outer peripheral edge of the pressing member 250 covers a part of the elastic strap hook 213 on the lower end side of the mount member 210. A step portion 243 of the microphone 240 covers a part of the elastic strap hook 213 on the upper end side of the mount member 210. The mount member 210 is sandwiched from above and below by the pressing member 250 and the step portion 243 of the microphone 241 to prevent the microphone case 241 and the elastic string 230 from falling off the mount member 210.

  A microphone connector 244 protrudes from the lower end of the microphone case 241 through the center hole of the pressing member 250. As shown in FIG. 3, a cable connector 280 is coupled to the microphone connector 244 so that an output signal of the microphone 240 is output to an external circuit via the microphone cable.

  In a state where the mount member 210 receives the microphone 240, the mount member 210 and the microphone 240 are supported via the elastic string 230, thereby being a movable part that can move integrally. The weight distribution of the microphone 240 is considered so that the center of gravity C as the entire movable portion is located on a horizontal line connecting the center positions of the left and right holes 222 of the support base 220.

  As can be seen from FIGS. 2, 3, etc., the mounting member 210 is substantially even in the vertical direction at the center in the axial direction about the horizontal line connecting the center positions of the left and right holes 222 of the support base 220 by the elastic string 230. It is supported by tension. As can be seen from FIG. 1, the elastic string 230 is evenly tensioned to the left and right with respect to the center line in the front-rear direction of the mount member 210.

  On the other hand, with respect to the horizontal line connecting the center positions of the left and right holes 222, as described above, the position of the notch of the support base 220 through which the elastic string 230 passes is asymmetrical in the front and rear directions. The position of the notch of the support base 220 that applies tension to the 230 is shifted rearward. More specifically, as described with reference to FIGS. 6 and 7, the pair of elastic cords 230 is distributed into two loop-like elastic cords with the bundling bracket 231 as a boundary. The elastic string passes through the notch 226 of the support base 220, while the other loop-shaped elastic string passes through the notch 227 of the support base 220. Since the notch 227 through which the latter loop-shaped elastic cord passes is formed to be biased toward the back of the support base 220, the tension of the latter loop-shaped elastic cord is larger than the tension of the former loop-shaped elastic cord. The mount member 210 is supported at a position biased toward the back of the support base 220.

  Now, if the two elastic strings 230 are both hooked on the mount member 210 via the notches 226 at equal positions from the left and right holes 222 of the support base 220, the left and right holes The tension is evenly applied in the front-rear direction around the horizontal line connecting the two. Thus, in a state where the tension of the elastic string 230 is distributed in a well-balanced manner in the front-rear direction, the elastic string 230 is mounted in an attempt to maintain the balance of the tension even when a force is applied to tilt the mount member 210 in the front-rear direction. The member 210 is stably supported with good balance.

  On the other hand, as in the illustrated embodiment, the notch position of the support base 230 through which the elastic string 230 passes is asymmetrical in the front-rear direction, and the position of the support base 220 that applies tension to the elastic string 230 is rearward. When shifted to the side, the tension of the elastic string 230 is different between the front and rear, and the mount member 210 can be tilted in the front-rear direction together with the microphone 240 within an angle range corresponding to the difference in tension between the front and rear. FIG. 5 shows a state in which the mount member 210 is tilted in the front-rear direction together with the microphone 240 in this way. The inclination angle of the mount member 210 is, for example, about ± 15 degrees and is not a large angle. However, the angle may be adjusted by making direct contact with the microphone 240, and it is not necessary to operate a kind of tightening screw, so that the angle can be finely adjusted easily. Therefore, for example, an announcer or a singer can finely adjust the tilt angle of the microphone to a desired angle while monitoring his / her voice with headphones or the like.

  When finely adjusting the tilt angle of the microphone, the elastic string 230 moves relative to the mount member 210 and the support base 220, and vibrations and sounds generated during the relative movement are slight. Noise can be reduced. After finely adjusting the angle, the posture of the mount member 210 is maintained by the frictional force between the mount member 210 and the support base 220 and the elastic string 230.

  1, 2, and 4, reference numeral 212 denotes an inner peripheral surface of the mount member 210. If the inner peripheral surface 212 of the mount member 210 is implanted by electrostatic flocking or the like, the microphone 240 is moved when the microphone 240 moves relative to the mount member 210 or when an external force is applied to the mount member 210. It is possible to prevent noise from being mixed into the output.

  In addition, it is preferable that the surface of the elastic string 230 is flocked by an electrostatic flocking method or the like. When flocking is applied to the surface of the elastic string 230, an appropriate frictional force is generated between the mount member 210 and the support base 220 and the elastic string 230, and the finely adjusted microphone angle can be stably maintained. Further, when the elastic string 230 moves relative to the mount member 210 and the support base 220, the pile on the surface of the elastic string 230 provides a vibration damping effect and a silent effect, and noise during the fine adjustment can be reduced. .

  The elastic string 230 is mainly composed of a rubber string, and deteriorates due to a chemical change with time. Therefore, it is desirable to replace the elastic string 230 periodically. According to the embodiment described above, the bundling metal fitting 231 obtained by joining the two elastic strings 230 is fitted into the outer shell member 225, and the outer elastic member 225 is inserted into the hole 222 of the support base 220. 230 may be bridged between the mount member 210 and the support base 220 as described above. When removing the elastic string 230, conversely, the elastic string 230 may be removed from the mount member 210 and the support base 220, and the binding metal 231 may be extracted from the hole 222 of the support base 220. Therefore, there is an advantage that the replacement work of the elastic string 230 is facilitated. In addition, the bundling metal fitting 231 in which the two elastic strings 230 are coupled may be directly inserted into the hole 222 of the support base 220 without the outer shell member 225 being interposed. As described above, if electrostatic flocking is applied to the surface of the elastic string 230, chemical change of the elastic string 230 over time can be suppressed.

The support base 220 in the illustrated embodiment is formed by cutting out a part of the ring, but may be a complete ring-shaped member.
In addition, the form of the elastic string between the mount member 210 and the support base 220 can be changed to various forms, and the form of the elastic string in the illustrated embodiment is merely an example.

The elastic cord is not limited to a configuration in which two loop-like elastic cords are formed with a binding member as a boundary as shown in FIGS. For example, both ends of one elastic string may be fixed to predetermined positions of the support base 220, and loop-shaped portions formed on both sides of the fixed position may be bridged between the mount member 210 and the support base 220. Alternatively, after a single elastic cord is bridged between the mount member 210 and the support base 220, a predetermined position of the elastic cord may be fixed to a predetermined position of the support base 220 by an appropriate fixing means. .
In addition, the design may be arbitrarily changed without departing from the technical scope described in the claims.

  In the illustrated embodiment, the microphone is held upward with respect to the mount member 210. However, the microphone may be held downward at the use site of the microphone.

210 Mounting member 213 Elastic string hook 220 Support base 222 Hole 226 Notch 227 Notch 230 Elastic string 240 Microphone

Claims (5)

A mounting member for receiving and holding the microphone body;
A support base formed in an arc shape having an inner diameter larger than the outer diameter of the mount member;
The mount member is held apart from the support base by being stretched between the support base located at the axially intermediate portion of the mount member and both sides of the mount member in the axial direction. An elastic string,
The support base has a plurality of cutouts through the elastic string at a plurality of locations,
A shock mount for a microphone in which the notches at the plurality of locations are asymmetrical in the longitudinal direction of the support base so that the tension of the elastic string is asymmetrical in the longitudinal direction, and the inclination of the mount member in the longitudinal direction can be adjusted.   Two sets of elastic cords, each having two loop-like elastic cords with the binding member as a boundary, are used as the elastic cords, and the elastic loops of each set are divided into the two loop-like elastic cords in the front and rear directions. The shock mount for a microphone according to claim 1, wherein the shock mount is bridged on both sides in the axial direction of the mount member via notches in the support base.   The shock mount for a microphone according to claim 1, wherein the tilt adjustment position of the mount member is maintained by the frictional force between the notch of the support base and the elastic string.   4. The shock mount for a microphone according to claim 1, wherein the elastic string has a flocked surface. The microphone shock mount according to claim 2, wherein the two elastic strings have a binding member fitted in a hole of the support base.

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