JP2017005562A - Microphone stand and microphone device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent rotation of a microphone, when a flexible pipe is bent.SOLUTION: A microphone stand 1 includes a flexible pipe 10 having a microphone fitting part 4 at one end, and including a coil spring and a friction material between lines interposed in the gap of the coil spring. The flexible pipe 10 is divided into a first pipe 11 and a second pipe 12 in the longitudinal central part. The first pipe 11 and second pipe 12 are coupled by an intermediate coupling member 13, and the directions of twist of the coil spring and friction material between lines are opposite to each other, in the first pipe 11 and second pipe 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a microphone stand for mounting a microphone and a microphone device provided with such a microphone stand.

  2. Description of the Related Art Conventionally, a microphone stand for mounting and using various microphones is known. For example, for collecting sound such as orchestra, a microphone stand is installed in a narrow gap between players, and the microphone is set so as to be suitable for sound collection of musical instruments. In such a situation, a side entry microphone that can reduce the installation space is used. That is, the side entry microphone can pick up sound from a direction orthogonal to the axis of the microphone, and is therefore suitable when the installation space is small.

  By the way, when the microphone stand is of a gooseneck type using a flexible pipe, the pipe rotates when the flexible pipe is repeatedly bent. This rotation occurs when a flexible pipe made of two kinds of wire is bent repeatedly, and the wire is unwound (relaxed). Since the microphone also rotates with the rotation, a deviation occurs in the position of the set microphone. In particular, in the case of using a side entry type microphone, if the microphone rotates when the flexible pipe is bent, the sound collection axis of the microphone rotates, which causes a problem in sound collection.

Japanese Patent Laying-Open No. 2015-84491

  An object of the present invention is to provide a microphone stand that prevents the rotation of the microphone when the flexible pipe is bent.

  A microphone stand according to the present invention includes a flexible pipe including one end forming a microphone mounting portion and including a coil spring and a line friction material interposed in a gap between the coil spring. The pipe is divided into a first pipe and a second pipe, and the first pipe and the second pipe are coupled by an intermediate coupling member, and the first pipe and the second pipe are twisted in the coil spring and the line friction material. The main features are that they are opposite to each other.

  According to the present invention, it is possible to prevent the microphone from rotating when the flexible pipe is bent.

1 is an external view showing a part of a microphone device provided with a microphone stand according to an embodiment of the present invention. It is an expanded partial sectional view of the flexible pipe of a microphone stand. It is a partially cutaway sectional view showing a modification in which a groove is provided on the inner wall of each of a pedestal, a support pipe, and an output connector. It is an external view of the conventional microphone stand for comparing with an embodiment.

  Embodiments of the present invention will be described in detail with reference to the drawings.

  The microphone stand 1 of the embodiment shown in FIG. 1 includes a flexible pipe 10 that can be bent, and a pedestal 3 and an output connector 4 that are attached to each end of the flexible pipe 10. FIG. 1 shows a state in which a side entry type microphone 50 is attached to the output connector 4 and shows the overall configuration of the microphone device.

  The pedestal portion 3 is a substantially cylindrical member having a base end portion (lower portion in FIG. 1) that is placed on a table or the like and has a role as a base that supports the entire apparatus. The pedestal portion 3 has an inner diameter that is substantially the same as the outer diameter of the flexible pipe 10 and is integrated with the flexible pipe 10 by inserting one end of the flexible pipe 10 by press-fitting or the like.

  One end side (the upper side in FIG. 1) of the output connector 4 has a role as a microphone attachment portion to which the microphone 50 is detachably attached. A flexible pipe 10 is connected to the other end side (lower side in FIG. 1) of the output connector 4.

  One end side of the output connector 4 that is a microphone mounting portion includes a hole portion into which a plurality of signal pins of the microphone 50 are inserted, a signal terminal for electrically connecting to each signal pin, a cable line, and the like. The cable wire extends from the one end side of the output connector 4 through the flexible pipe 10 and the pedestal portion 3 to the outside of the pedestal portion 3 in order to transmit the output signal of the microphone 50 to an external device.

  A circular hole having an inner diameter substantially the same as the outer diameter of the flexible pipe 10 is formed on the other end side of the output connector 4. The other end of the flexible pipe 10 is inserted into the hole by press fitting or the like, and the output connector 4 is integrated with the flexible pipe 10.

  The flexible pipe 10 is a cylindrical member. The flexible pipe 10 includes a first pipe 11 having one end connected to the pedestal 3, a second pipe 12 having one end connected to the output connector 4, and a support pipe connecting the other ends of the pipes 11 and 12. 13.

  The support pipe 13 is a cylindrical member, and has a role as an intermediate coupling member that couples the first pipe 11 and the second pipe 12 at the longitudinal center of the flexible pipe 10.

  The support pipe 13 has the same inner diameter as the outer diameter of the flexible pipe 10 (each of the pipes 11 and 12), and the other end of each of the pipes 11 and 12 is fitted into the inner wall thereof by press-fitting or the like. (11, 12).

  As shown in FIG. 2, each of the pipes 11 and 12 constituting the flexible pipe 10 includes a round steel wire 34 as a coil spring and a triangular wire 35 as a line friction material interposed in a gap outside the round steel wire 34. It consists of. The round steel wire 34 is a steel material having a circular cross section, and is formed in a coil spring shape. The triangular wire 35 is a metal member (for example, brass alloy) having a triangular cross section, and is tightly wound so as to be sandwiched between the round steel wires on the outer peripheral side of the round steel wire 34. The flexible pipe 10 having such a configuration is flexible and has a self-holding property that keeps the bent state by the frictional force between the round steel wire 34 and the triangular wire 35.

  In the flexible pipe 10 of the present embodiment, the winding direction of the round steel wire 34 and the triangular wire 35, that is, the twisting direction, is reversed between the first pipe 11 and the second pipe 12 (see FIG. 1). ). In this example, the twisting direction of the first pipe 11 is rightward, and the twisting direction of the second pipe 12 is leftward, but this may be reversed.

  In the microphone stand 1 having such a configuration, the first pipe 11 and the second pipe 12 rotate in the opposite directions in the rotation of the pipe due to the looseness of the flexible pipe 10 that occurs when the flexible pipe 10 is bent. Therefore, the rotation of the first pipe 11 and the second pipe 12 cancels the rotation of the flexible pipe 10, so that the microphone 50 does not rotate. Therefore, according to the microphone stand 1 according to the present embodiment, rotation of the sound collecting shaft of the side entry type microphone 50 can be prevented.

  In order to help understanding of the present embodiment, a conventional microphone stand will be illustrated and described below as a comparative example. A conventional microphone stand 100 shown in FIG. 4 includes a flexible pipe 110 that can be bent, and a pedestal 103 and an output connector 104 that are attached to each end of the flexible pipe 110. FIG. 4 shows a state in which a side entry type microphone 150 is attached to the output connector 104.

  In the microphone stand 100, the winding direction of the round steel wire and the triangular wire of the flexible pipe 110, that is, the twisting direction is constant (rightward). Here, when the flexible pipe 110 is bent from the straight state of FIG. 4, slip (slip) occurs between the members, and as a result, the flexible pipe 110 is displaced and loosened. This loosening causes the entire flexible pipe 110 to rotate in a certain direction (in this case, to the right). Therefore, when the side entry type microphone is set on the microphone stand 100, the sound collection axis of the microphone is rotated by the rotation when the flexible pipe 110 is bent. Therefore, inconvenience in sound collection occurs.

  On the other hand, in the microphone stand 1 of the present embodiment, the winding direction of the round steel wire 34 and the triangular wire 35 of the flexible pipe 10, that is, the twisting direction is not constant, and the first pipe 11 and the second pipe 12 Are opposite to each other.

  Here, when the flexible pipe 10 is bent from the straight state of FIG. 1, slip occurs between the members of the round steel wire 34 and the triangular wire 35 constituting the pipes 11 and 12. However, the twist directions of the pipes 11 and 12 are opposite to each other. That is, the first pipe 11 rotates to the right and the second pipe 12 rotates to the left.

  Accordingly, the support pipe 13 positioned on the end side of the first pipe 11 rotates rightward, but the second pipe 12 rotates leftward. Therefore, even if the support pipe 13 rotates, the displacement of the pointing axis due to the rotation of the microphone is not caused. small. In the present embodiment, even when the flexible pipe 10 is loosened due to bending and rotates, the rotation of the entire flexible pipe 10 is canceled by the first pipe 11 and the second pipe 12 wound in opposite directions. As a result, the rotation of the microphone 50 is prevented, or even if the microphone 50 rotates, the displacement is small.

  Therefore, according to the microphone stand 1, even if the flexible pipe 10 rotates due to bending, the displacement due to the rotation of the set microphone 50 becomes small. As a result, the microphone stand 1 according to the present embodiment can prevent or reduce the displacement of the sound collection axis even if the set microphone is a side entry type.

  In the present embodiment, in order to completely prevent the flexible pipe 10 from rotating when bent, the characteristics of the first pipe 11 and the second pipe 12 must be the same. Here, the “characteristic” refers to the characteristic of rotation with respect to bending, that is, the degree or amount of rotation when a pipe is bent.

  In order to make these characteristics the same, in this embodiment, the lengths of the first pipe 11 and the second pipe 12 are the same, and the effective lengths L1 and L2 of the pipes 11 and 12 shown in FIG. Are equal. Here, the effective length is the length of the portion that deforms when the flexible pipe 10 is bent.

  Specifically, in the first pipe 11, the length L 1 from the end of the pedestal 3 to the end of the support pipe 13, and in the second pipe 12, the length from the end of the output connector 4 to the end of the support pipe 13. The length L2 is the effective length.

  In addition, various fine adjustments may be performed on the pipes 11 and 12 so that the pipes 11 and 12 have the same characteristics.

  In spite of the fact that the effective lengths L1 and L2 are completely equal, a slight rotation actually occurs when the flexible pipe 10 is bent. The cause of such rotation is the wear of the triangular wire constituting the flexible pipe. The triangular wire wears due to repeated bending, thereby creating a gap with the round steel wire and loosening the flexible pipe. In addition, a defective mounting state of the pipes 11 and 12 to the corresponding members (the pedestal 3, the support pipe 13, and the output connector 4) during assembly of the microphone stand also induces rotation.

  Further, errors that occur when the microphone stand is assembled include the occurrence of plastic deformation when a long pipe member composed of the round steel wire 34 and the triangular wire 35 is cut, and the difference in the number of turns and the pitch. Due to these error factors, a deviation occurs in the sound collection axis of the side address microphone. Due to such a shift in the sound collecting axis, a desired sound cannot be picked up. In particular, when collecting musical sounds such as orchestras, small errors affect the microphone settings.

  That is, the displacement and loosening of the constituent members (34, 35) of the flexible pipe 10 due to the mounting state and bending of the pedestal 3, the support pipe 13, and the output connector 4 cause rotation and cause a shift of the sound collection axis. Furthermore, if any of the pipes 11 and 12 is rotated when the flexible pipe 10 is bent, the rotation of the entire pipe 10 is canceled due to poor attachment of the pedestal 3, the support pipe 13, and the output connector 4. Absent. Therefore, the microphone stand rotates when the flexible pipe 10 is bent.

  In view of the above, in order to prevent as much as possible the rotation that occurs when the flexible pipe 10 is bent, both ends of each of the pipes 11 and 12 of the flexible pipe 10 are provided with the corresponding pedestal 3, support pipe 13 and output. The connector 4 must be firmly fixed, that is, firmly fixed.

  In order to realize such a firm fixation, for example, it corresponds to the winding direction and pitch of the pipes 11 and 12 to be attached to the inner walls of the pedestal 3, the support pipe 13 and the output connector 4 to which the flexible pipe 10 is attached. A spiral groove (groove forming a female thread) may be provided. An example in which such a groove is provided is shown in FIG.

  The pedestal portion 3A, the support pipe 13A, and the output connector 4A according to the second embodiment shown in FIG. 3 are groove portions 132 and 133 that form female threads on each inner wall (inner peripheral surface) to which the flexible pipe 10 is attached. , 31 and 41 are provided.

  In the support pipe 13A, a ring-shaped wall 131 is formed to rise on the inner surface of the cylindrical pipe body 130 in the longitudinal direction, and grooves 132 and 133 are formed on both sides (upper and lower sides in FIG. 3) of the wall 131. Has been. The wall 131 separates the ends of the grooves 132 and 133 and has a role of passing the above-described cable wire from the central hole 131a.

  With such a configuration, in the example of FIG. 3, the first pipe 11 is screwed into the grooves 31 and 132 of the pedestal portion 3A and the support pipe 13A by rotating clockwise, and the second pipe 12A is supported by the support pipe 13A and the output connector. It is screwed into each groove part 133, 41 of 4A by left rotation. And each pipe 11 and 12 is firmly fixed with respect to the member to which each end part is screwed by the end of the groove shape of a corresponding groove part. Further, the support pipe 13A, the pedestal portion 3A, and the output connector 4A having such a configuration make it possible to adjust the attachment state of the flexible pipe depending on the screwing condition.

  In this way, the ends of each pipe 11, 12 are firmly fixed to the corresponding pedestal 3A, support pipe 13A, and output connector 4A, so that the characteristics of each pipe 11, 12 can be made as equal as possible. . Therefore, the flexible pipe 10 can be prevented from rotating at the time of bending.

  As described above, according to the present embodiment, it is possible to provide a microphone stand that prevents the microphone from rotating when the flexible pipe is bent.

  In addition, the configuration of the above-described embodiment can be changed in design without departing from the technical idea described in the claims.

DESCRIPTION OF SYMBOLS 1 Microphone stand 10 Flexible pipe 11 1st pipe 12 2nd pipe 13, 13A Support pipe (intermediate coupling member)
34 Round steel wire (coil spring)
35 Triangle line (Friction material between lines)
3,3A Base 4,4A Output connector (microphone mounting part)
50 microphone

Claims (6)

A microphone stand provided with a flexible pipe including one end of a microphone mounting portion and a coil spring and a line friction material interposed in a gap between the coil spring,
The flexible pipe is divided into a first pipe and a second pipe at a central portion in the length direction,
The first pipe and the second pipe are coupled by an intermediate coupling member;
The microphone stand of the first pipe and the second pipe, wherein the coil spring and the inter-line friction material are twisted in opposite directions. The microphone stand according to claim 1, wherein the microphone attachment portion attaches a side entry type microphone. The microphone stand according to claim 1 or 2, wherein the first pipe and the second pipe are cylindrical members. 4. The microphone stand according to claim 3, wherein the intermediate coupling member is a cylindrical member that is coupled with an outer periphery on the other end side of the first pipe and an outer periphery on the one end side of the second pipe. The microphone stand according to any one of claims 1 to 4, wherein the first pipe and the second pipe have the same characteristics. A microphone stand according to any one of claims 1 to 5,
A microphone attached to the microphone attachment portion;
A base attached to the other end of the flexible pipe;
Including a microphone device.

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