JP6421359B2 - Gooseneck microphone - Google Patents

Description

  The present invention relates to a gooseneck microphone.

  There is known a gooseneck microphone that can maintain a state in which a sound collection port of a microphone unit is directed in a predetermined direction (see, for example, Patent Document 1). The gooseneck microphone includes a flexible pipe, and a microphone unit is fixed to one end, and a microphone terminal is fixed to the other end. For example, the microphone terminal may include a fixing member that is fixed to a conference table or the like. The space from the microphone unit to the terminal is called a microphone boom. A flexible pipe is used for the whole or a part of the microphone boom.

  The flexible pipe is a cylindrical member configured by combining a round wire and a triangular wire. The round wire is a hard steel wire having a circular cross section. The triangular wire is a metal wire having a triangular cross section and capable of plastic deformation. The flexible pipe is formed by tightly winding the round wire rod in a cylindrical shape to form a coil spring-like tubular member, and sandwiching one of the apexes of the triangular wire rod between the tubular member wires. . The flexible pipe having such a structure can be bent in an arbitrary direction due to the flexibility of the round wire, and can maintain a bent state by the frictional force between the triangular wire and the round wire (for example, Patent Document 1). See).

  Although the entire microphone boom can be formed of only a flexible pipe, it is difficult to return the microphone boom to a straight state after being bent at any part of the microphone boom. As the number of bent portions increases, the aesthetic appearance is impaired. For this purpose, an intermediate pipe, which is a tubular member, is used for the microphone boom so that a bendable portion is limited and the convenience of the flexible pipe is not impaired.

  In this case, the upper flexible pipe is attached to the upper end side of the intermediate pipe, and the lower flexible pipe is attached to the lower end side. A microphone unit is fixed to the upper end (front end) of the upper flexible pipe, and a microphone fixing portion including a terminal portion is fixed to the lower end (rear end) of the lower flexible pipe.

  Some microphone units attached to the tip of the upper flexible pipe include only an electroacoustic conversion unit or include an output circuit. Both are relatively lightweight. Therefore, the upper flexible pipe may be thin. On the other hand, the lower flexible pipe must support the intermediate pipe, the upper flexible pipe and the microphone unit in addition to its own weight. In addition, the bent state must be maintained and the whole must be fixed and supported at a predetermined position. Therefore, the lower flexible pipe is thicker than the upper flexible pipe or the intermediate pipe (see, for example, Patent Document 2).

JP-A-9-229292 Japanese Patent No. 5586518

  The upper flexible pipe, the intermediate pipe, and the lower flexible pipe that constitute the microphone boom are all metallic members and constitute an electrostatic shield in the gooseneck microphone. Therefore, each must be connected and fixed so that the conduction state from the upper flexible pipe to the lower flexible pipe is good.

  Since the lower flexible pipe has a diameter larger than that of the intermediate pipe, the rear end surface (cut surface) of the intermediate pipe and the front end surface (cut surface) of the lower flexible pipe cannot be sufficiently in surface contact. In addition, a slight gap is formed between the metal joint member used to fix the contact portion and the contact surfaces of the intermediate pipe and the rear flexible pipe, and the gap is filled with the adhesive. Accordingly, the mechanical strength of the contact portion (joint portion) between the intermediate pipe and the rear flexible pipe depends on the strength of the adhesive, and sufficient mechanical strength cannot be obtained.

  In addition, since the conductive state of the intermediate pipe and the rear flexible pipe is maintained via the adhesive and the joint member, the electrostatic shield tends to be uncertain at the joint portion between the intermediate pipe and the lower flexible pipe.

  Accordingly, the present invention provides a gooseneck microphone capable of maintaining a conductive state that reliably constitutes an electrostatic shield and enhancing mechanical strength at a joint portion between a flexible pipe and a non-flexible pipe. The purpose is to provide.

  The present invention is a gooseneck microphone including a microphone unit and a microphone fixing portion at both ends of a support including a flexible support, and the support is coupled to the fixed support and the first flexible support. A member, and a second flexible support, wherein the fixed support has the first flexible support fixed to one end and the other end to the coupling member. The microphone unit is fixed to one end of the first flexible support, and the microphone fixing unit is fixed to one end of the second flexible support, The other end portion is fixed to the coupling member, and the other end portion of the fixed support body is formed with a flange portion whose outer diameter is increased, and the second flexible support body The other end is in surface contact with the end face of the flange part. And features.

  According to the present invention, it is possible to maintain a conduction state that reliably constitutes the electrostatic shield and to increase the mechanical strength.

It is a side view showing an example of a gooseneck microphone according to the present invention. It is the expanded longitudinal cross-sectional view which expanded a part of said gooseneck microphone. It is the expanded longitudinal cross-sectional view which expanded the coupling | bond part of the intermediate | middle pipe and lower flexible pipe with which the said gooseneck microphone was equipped. It is explanatory drawing which shows the example of the manufacturing process of the microphone boom of the said gooseneck microphone.

  Hereinafter, embodiments of the gooseneck microphone according to the present invention will be described with reference to the drawings. As shown in FIG. 1, the gooseneck microphone 1 includes a microphone unit 50, a microphone fixing unit 60 including a microphone terminal, a microphone unit 50 fixed to one side, and a microphone boom 100 having a microphone fixing unit 60 at the other end. And. The microphone boom 100 is a support body including a flexible support body described below.

  The microphone boom 100 includes an upper flexible pipe 40 that is a first flexible support, a lower flexible pipe 30 that is a second flexible support, an intermediate pipe 10 that is a fixed support, and a joint that is a coupling member. And a member 20. The upper flexible pipe 40 has a microphone unit 50 attached to the tip, and the rear end is fixed to the tip of the intermediate pipe 10. The lower flexible pipe 30 has a microphone fixing portion 60 fixed to the rear end, and the front end is fixed to the rear end of the intermediate pipe 10. Further, the front end portion of the lower flexible pipe 30 and the rear end portion of the intermediate pipe 10 are fixed using the joint member 20. In other words, the microphone boom 100 includes a flexible support at each of both ends of the intermediate pipe 10 that is a fixed support.

  The upper flexible pipe 40, the intermediate pipe 10, the lower flexible pipe 30, and the joint member 20 are all made of metal and are tubular members that are hollow inside.

  The microphone unit 50 is an electroacoustic transducer having various types such as a capacitor type and a dynamic type. Hereinafter, in the present embodiment, an example in which the microphone unit 50 is used as a condenser microphone unit will be described. The microphone unit 50 includes a separation type and an integral type. For example, if the gooseneck microphone 1 is a separation type, only the electroacoustic conversion unit is arranged in the microphone unit 50, and the output module unit including the audio signal output circuit board is arranged inside the microphone fixing unit 60. . On the other hand, in the case of the integrated type, an electroacoustic conversion unit and an output module unit are arranged inside the microphone unit 50.

  Regardless of the separation type or the integral type, a conductive wire connecting the microphone unit 50 and the microphone terminal in the microphone fixing portion 60 is wired in the internal space of the microphone boom 100. Therefore, the microphone boom 100 (the upper flexible pipe 40, the intermediate pipe 10, the lower flexible pipe 30, and the joint member 20) constitutes an electrostatic shield for this conductive wire.

  The microphone fixing unit 60 includes at least an output terminal, and also includes an output module unit if it is a separation type. The gooseneck microphone 1 is fixed to a conference table or the like by the microphone fixing unit 60.

Next, the characteristic part of the present invention will be described in detail. FIG. 2 is an enlarged longitudinal sectional view of the rectangular area A shown in FIG. As shown in FIG. 2, the intermediate pipe 10 and the lower flexible pipe 30 are respectively pushed into the joint member 20 and fixed in a state of surface contact with each other. The outer periphery of the cross-sectional portion where the intermediate pipe 10 and the lower flexible pipe 30 face each other is covered with the joint member 20.

  The joint member 20 is a hollow cylindrical member, and has an inner diameter at a portion extending from one opening to the vicinity of the middle in the longitudinal direction and an inner diameter at a portion extending from the other opening to the vicinity of the middle in the longitudinal direction. . Specifically, the portion on one end side where the outer wall of the intermediate pipe 10 contacts is a small diameter portion with a small inner diameter. The portion on the other end side that is in contact with the outer wall of the lower flexible pipe 30 is a large-diameter portion having a large inner diameter. A stepped portion 201 in which the inner wall is cut outward is formed in a step shape at the boundary portion between the narrow inner diameter portion and the thick inner diameter portion, that is, the boundary between the small diameter portion and the large diameter portion. .

  When the microphone boom 100 is assembled, as shown in FIG. 4, the intermediate pipe 10 is inserted from the opening on the lower end side (large diameter portion) of the joint member 20 toward the front end, and the rear end of the intermediate pipe 10 is stepped. Push until it is caught by the shape part 201. Thereafter, the tip of the lower flexible pipe 30 is inserted from the opening on the lower end side of the joint member 20 and pushed in until it comes into contact with the intermediate pipe 10. An epoxy adhesive is applied in advance to the outer periphery of the lower end portion of the intermediate pipe 10 and the outer periphery of the tip of the lower flexible pipe 30. As a result, the intermediate pipe 10 and the lower flexible pipe 30 inserted into the joint member 20 are firmly fixed by drying the adhesive.

  The structure of the joint portion between the intermediate pipe 10 and the lower flexible pipe 30 will be described in more detail. As shown in FIG. 3, a flange portion 101 is formed at the rear end portion of the intermediate pipe 10 (the portion facing the front end of the lower flexible pipe 30). . On the other hand, a stepped portion 201 is formed in the portion of the joint member 20 with which the flange portion 101 abuts. An adhesive is applied between the outer peripheral surface and upper end surface of the flange portion 101 and the stepped portion 201 of the joint member 20. The adhesive layer is thinly formed at the contact portion between the flange portion 101 and the step portion 201 of the intermediate pipe 10. As a result, the intermediate pipe 10 and the joint member 20 are joined together without a gap and fixed together.

  The outer diameter of the flange portion 101 is substantially the same as the outer diameter of the lower flexible pipe 30. A contact surface 301 of the lower flexible pipe 30 that contacts the flange portion 101 is a cross section of a round wire or a triangular wire. These cross sections are not flattened, but the end surface of the lower flexible pipe 30 facing the end surface of the flange portion 101 is in surface contact with a certain amount of pressing force. Therefore, the end portions of the intermediate pipe 10 and the lower flexible pipe 30 facing each other are in contact with each other by the contact surface 301, and the intermediate pipe 10 and the lower flexible pipe 30 are electrically connected by this contact. Since the lower flexible pipe 30 is inserted into the joint member 20 with the adhesive applied to the outer periphery of the end portion, a thin adhesive layer is formed between the outer wall of the lower flexible pipe 30 and the inner wall of the joint member 20. Has been.

  Since the adhesive layer formed between the intermediate pipe 10 and the joint member 20 and between the lower flexible pipe 30 and the joint member 20 is thin, the mechanical strength of these joint portions is the machine of the intermediate pipe 10 and the lower flexible pipe 30. Depends on strength. Accordingly, the coupling structure of the intermediate pipe 10, the joint member 20, and the lower flexible pipe 30 has a structure in which the mechanical strength depends on the strength of the metal member. Therefore, the mechanical strength can be improved as compared with the conventional structure. it can.

  Moreover, since the lower flexible pipe 30 is a coupling member of a round wire and a triangular wire, the cross-sectional portion at the tip does not become a flat surface, and some rewinding occurs. However, since the expansion of the cross-sectional portion is suppressed by the inner wall of the joint member 20 and the contact surface with the lower flexible pipe 30 on the intermediate pipe 10 side is widened, a good conduction state can be formed. it can.

1 Gooseneck microphone 10 Intermediate pipe (fixed support)
20 Joint member (joint member)
30 Lower flexible pipe (second flexible support)
40 Upper flexible pipe (first flexible support)
50 Microphone unit 60 Microphone fixing part 100 Microphone boom (support)

Claims (5)

A gooseneck microphone including a microphone unit and a microphone fixing portion at both ends of a support including a flexible support,
The support includes a fixed support, a first flexible support, a coupling member, and a second flexible support,
In the fixed support, the first flexible support is fixed to one end, and the other end is fixed to the coupling member.
The first flexible support has the microphone unit fixed to one end,
In the second flexible support, the microphone fixing portion is fixed to one end portion, and the other end portion is fixed to the coupling member,
At the other end of the fixed support, a flange portion having an enlarged outer diameter is formed,
The other end of the second flexible support is in surface contact with the end face of the flange.
This is a gooseneck microphone. On the inner wall of the coupling member, a stepped portion is formed on which the flange portion is hooked.
The gooseneck microphone according to claim 1. The coupling member is cylindrical and has a large diameter portion and a small diameter portion, and the stepped portion is formed at the boundary between the large diameter portion and the small diameter portion.
The gooseneck microphone according to claim 2. The second flexible support is pushed into the large diameter portion, and the fixed support is pushed into the small diameter portion,
The gooseneck microphone according to claim 3. The outer diameter of the second flexible support is thicker than the outer diameter of the first flexible support,
The gooseneck microphone according to any one of claims 1 to 4.

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