JP4945201B2 - Microphone device - Google Patents

Description

  The present invention relates to a microphone device in which a microphone unit is supported by a part of a support pipe including a flexible shaft. More specifically, the present invention relates to a technique that makes it possible to easily adjust the bending strength of a flexible shaft.

  A gooseneck type microphone used in a conference or the like has a microphone unit attached to the tip of a cylindrical support pipe, and has a connector connected to a microphone base or a terminal provided on a desk at the other end. .

  As described in Patent Document 1, the gooseneck type microphone has a flexible shaft that can be bent at a part of the support pipe, and the direction of the microphone can be freely changed toward the mouth of the speaker by the flexible shaft. Can do. In addition, the whole support pipe may be comprised from the flexible shaft.

  By the way, it is common for gooseneck microphones to stand vertically with respect to a horizontal installation surface such as a desk, but recently, for example, in convention venues, gooseneck microphones are used against vertical walls. There is a case where a microphone is attached, that is, it is used in a special manner in which the microphone is attached horizontally to the ground.

  However, in such a case, as the time elapses, the flexible shaft may be bent downward due to the weight of the microphone unit, and the direction of the microphone unit may be arbitrarily changed.

  In order to prevent this, the restoring force of the coil spring of the flexible shaft may be increased, but if the restoring force is increased too much, the restoring force becomes larger than the frictional force between the coils. Therefore, since the flexible shaft itself becomes like a spring, even if the orientation of the microphone unit is fixed, the flexible shaft gradually returns to the original position due to the restoring force.

  Thus, the required flexural strength of the flexible shaft differs between vertical installation (normal mounting configuration) and horizontal installation (wall mounting configuration). That is, if the restoring force of the flexible shaft is set for the purpose of vertical installation, the restoring force is too weak at the time of horizontal installation and bends. On the other hand, if the restoring force is set for the purpose of horizontal installation, the restoring force is too large for vertical installation, so the microphone unit cannot be freely changed in direction and fixed.

  As another problem, since the flexible shaft used in the gooseneck type microphone is 10 to 20 cm at most, a necessary length is cut from the mother shaft manufactured in units of meters.

  Therefore, in order to change the flexural strength of the flexible shaft that requires individual gooseneck type microphones, the flexural strength of the mother shaft itself must be changed. Costs also increase.

Japanese Utility Model Publication No. 63-40945

  Therefore, in order to solve the above-described problems, the present invention can easily change the flexural strength of the flexible shaft. For example, a gooseneck type microphone device that can easily change specifications for both vertical installation and horizontal installation methods. It is to provide.

In order to solve the above problems, the present invention has the following features. The invention according to claim 1 has a cylindrical support pipe having a microphone unit attached to the tip and a connector attached to the other end, and an inner part wound spirally around at least a part of the support pipe. In the microphone device in which a flexible shaft having a hollow inside is used, including a winding and an outer winding wound spirally so as to enter between the inner windings on the outer peripheral surface side of the inner winding In the flexible shaft , a metal core material for changing the bending strength of the flexible shaft is inserted.

According to a second aspect of the present invention, in the first aspect, the core member has one end fixed to a fixing member that holds the terminal pin of the connector, and the other end side is not connected to the flexible shaft . It is characterized by restraint.

  According to a third aspect of the present invention, in the second aspect of the invention, the core member is soldered to a ground terminal of the fixing member.

The invention described in claim 4 is characterized in that, in claim 1, 2 or 3, the core material is covered with a synthetic resin film.

The invention described in claim 5 is characterized in that, in the above-mentioned claim 4, the core material is integrated with the microphone cable connected to the terminal pin by the synthetic resin film .

  According to the present invention, by inserting the core material into the flexible shaft, the bending strength of the entire flexible shaft can be easily changed without changing the specification of the flexible shaft. Moreover, by fixing the core material to the fixing member, the core material can be easily fixed using the existing member.

  By covering the surface of the core material with the synthetic resin film, it is possible to prevent sliding sound from being generated due to friction between the core material and the flexible shaft. Furthermore, by covering the core material integrally with the microphone cable, the microphone cable can be easily inserted along the support pipe, and workability is improved.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external front view of a microphone according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the main part thereof, and FIG. 3 is a front view of a state in which internal terminals are extracted.

  As shown in FIG. 1, the microphone device 1 includes a support pipe 2 including a flexible shaft 3, and a condenser microphone unit M is attached to the tip of the support pipe 2.

  In the case of a gooseneck type microphone, a condenser microphone unit is usually used as the microphone unit M, but it may be a dynamic type. In the present invention, the configuration of the condenser microphone unit M is an optional item, and thus the description thereof is omitted.

  Referring also to FIG. 2, an insert fitting 21 is provided on the other end side of the support pipe 2, and the flexible shaft 3 is fixed to the insert fitting 21 by pressure bonding. The flexible shaft 3 includes an inner winding 31 wound spirally at a predetermined pitch and an outer winding wound spirally along the outer peripheral surface so as to block the pitch between the inner windings 31. 32, and is formed in a hollow pipe shape inside.

  The inner winding 31 is a coil spring made of a steel metal wire having a round cross section and bearing an elastic restoring force. On the other hand, the outer winding 32 is made of, for example, a copper coil having a triangular cross section and is made of a material that is hard to work and harden due to plastic deformation.

  In this example, the flexible shaft 3 is composed of two wires, but may be three or more. The inner winding 31 and the outer winding 32 are preferably coated with a synthetic resin on the surface in order to improve the appearance while preventing finger meat from being sandwiched between the coils. The length and diameter of the flexible shaft 3 are arbitrarily selected according to specifications.

  The other end of the flexible shaft 3 is attached with a connector 4 for connection to an installation portion (not shown) such as a microphone base or a table (not shown). Referring also to FIG. 2, the connector 4 includes a connector case 41 to which the flexible shaft 3 is fixed, and a connector main body 5 accommodated in the connector case 41.

  The connector case 41 is made of a molded product of a conductive material such as an aluminum alloy, and a shaft fixing hole 42 into which the flexible shaft 3 is inserted is provided on the upper end side. On the other end side of the connector case 41, a storage portion 43 for storing the connector main body 5 is provided.

Referring to FIG. 3 , the connector main body 5 includes a connector base 51 having three terminal pins 52 of hot, cold, and shield, and the other end of the connector base 51 has a condenser microphone unit M and each terminal. A microphone cable 53 for connecting the pin 52 is attached.

  A core member 6 inserted along the inside of the flexible shaft 3 is attached to the connector base 51. The core material 6 is preferably made of a metal wire such as a power supply line, which is difficult to work and harden by bending. In this example, the core material 6 is an annealed copper wire of φ1.6 mm.

  One end of the core material 6 is fixed to the ground terminal 54 of the connector base 51 by soldering. In this example, the core member 6 is fixed to the ground terminal 54, but in addition to this, the core member 6 may be embedded in the connector base 51.

  The core material 6 is preferably covered with a resin film 61, and more preferably, is integrally covered with the resin film 61 together with the microphone cable 53. In this example, the resin film 61 is integrally covered with the microphone cable 53 by a heat shrink film.

  According to this, as shown in FIG. 2, since the core material 6 is inserted into the flexible shaft 3, the bending strength of the core material 6 is added to the bending strength of the flexible shaft 3. The bending characteristics of the flexible shaft 3 can be easily changed without changing the specifications.

  Further, since the core member 6 is integrated with the microphone cable 53, not only can the sliding noise generated by rubbing against the flexible shaft 6 be prevented, but the microphone cable 53 can be easily inserted into the support pipe 2.

  In this example, the core material 6 is made of a relatively hard metal wire. However, the material is not limited to metal and may be made of a synthetic resin, and the desired bending characteristics of the flexible shaft 6 can be obtained. If it exists, it is arbitrarily used according to the specification. However, the length of the core member 6 is preferably set longer than the length of the flexible shaft 3.

  In this example, the flexible shaft 3 is provided on the connector 4 side. However, when the flexible shaft 3 is connected to the condenser microphone unit M side, the flexible shaft 3 is fixed to the core member 6 inside the condenser microphone unit M. Just fine. Such an embodiment is also included in the present invention.

  The present invention has been described by taking a gooseneck type microphone as an example. However, in addition to this, for example, the present invention may be applied to a case where a flexible shaft is used as a part of a headset type microphone. It can be applied to the microphone device of the embodiment. Moreover, it is applicable also when the whole support pipe consists of a flexible shaft.

1 is a front view of a microphone device according to an embodiment of the present invention. The fragmentary sectional view which shows the internal structure of the said microphone apparatus. The front view of the state which extracted the inside of the said microphone apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Microphone apparatus 2 Support pipe 3 Flexible shaft 4 Connector 5 Connector main body 6 Core material M Condenser microphone unit

Claims (5)

It has a cylindrical support pipe with a microphone unit attached to the tip and a connector attached to the other end. An inner winding wound spirally around at least a part of the support pipe, and the inner winding In the microphone device in which a flexible shaft having a hollow inside including an outer winding spirally wound so as to enter between the inner windings on the outer peripheral surface side is used,
The inside of the flexible shaft, the microphone device, wherein a metal-made core member for varying the bending strength of the flexible shaft is inserted. 2. The microphone according to claim 1, wherein one end of the core member is fixed to a fixing member that holds a terminal pin of the connector, and the other end is unconstrained with respect to the flexible shaft . apparatus.   The microphone device according to claim 2, wherein the core member is soldered to a ground terminal of the fixing member. 4. The microphone device according to claim 1, wherein the core material is covered with a synthetic resin film. The microphone device according to claim 4, wherein the core material is integrated with the microphone cable connected to the terminal pin by the synthetic resin film .

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