JP4476838B2 - Flexible pipe and gooseneck type microphone device - Google Patents

Description

  The present invention relates to a flexible pipe that can be particularly preferably used as a support column that supports a microphone unit so that the position of the microphone unit can be adjusted, and a gooseneck type microphone device using the flexible pipe.

  In the gooseneck type microphone device, a flexible pipe is used as a supporting column for supporting the microphone unit, and a speaker in a conference hall or the like bends the flexible pipe in a desired direction so that the microphone unit side is turned into a sound source (mouth). ) And can be moved and adjusted to an appropriate position determined by the relationship.

FIG. 3 is an overall perspective view showing a conventional example of a gooseneck type microphone device disclosed in Patent Document 1 below. In this case, the gooseneck type microphone device 1 uses the base end side of the flexible pipe 4 as a support base 2. The whole is formed by fixing and attaching the microphone unit 3 to the front end side.
Japanese Patent Laid-Open No. 9-229292 (see FIG. 2)

  FIG. 4 is a longitudinal sectional view partially showing the structure of the flexible pipe 4 constituting the gooseneck type microphone device 1, and FIG. 5 is an end view showing the main part of FIG. 4 in an enlarged state. It is.

  According to these drawings, the flexible pipe 4 includes a tension coil spring body 6 formed by applying a restoring force by tightly winding a round wire 7 made of a hard metal such as steel into a cylindrical shape, It is formed by a combination with a plastically deformable metal having a triangular cross section with the side corners 9 facing inward, for example, a triangular wire 8 made of a copper alloy.

  In this case, the flexible pipe 4 is manufactured by winding the triangular wire 8 so that one side corner 9 side is sandwiched in a gap formed between the round wires 7 when the tension coil spring body 6 is pulled. ing.

  For this reason, in the normal state, the flexible pipe 4 generates a strong frictional force between the round wire 7 and the triangular wire 8. Since the microphone unit 3 can be held, the microphone unit 3 attached to the tip side can also be moved and adjusted to an appropriate position.

  By the way, the bending of the flexible pipe 4 is performed against the strong frictional force generated between the round wire 7 and the triangular wire 8, and as a result, by repeatedly bending, for example, a copper alloy having a lower hardness than steel. The triangular wire 8 side composed of the above is cut to the round wire 7 side to generate metal powder.

  The metal powder generated in this way falls in the flexible pipe 4 and falls to the support base 2 side shown in FIG. 3 where a substrate equipped with an electronic circuit, an output connector, and the like are disposed, and a failure such as a short circuit occurs. There was an inconvenience that caused it to occur.

  On the other hand, even if the triangular wire 8 side is formed using a mild steel wire that is hard to be cut so as not to generate metal powder, the hardness is still low compared to the round wire 7 side, so even if the amount is small Similarly, metal powder was generated, and there was a problem that the metal powder rusted due to humidity and deteriorated its appearance.

  SUMMARY OF THE INVENTION The present invention provides a flexible pipe and gooseneck type microphone device capable of effectively preventing metal powder generated when bending is repeatedly performed in view of the above-described problems of the prior art. Has a purpose.

  The present invention has been made to achieve the above object, and the first invention of the invention is made of a metal that can be plastically deformed with respect to a tension coil spring body formed by using a round wire made of a hard metal. In a flexible pipe formed by winding a triangular wire rod so that one side corner portion is sandwiched between the adjacent round wire rods and interposing in the length direction, at least at a substantially central portion in the length direction The most important feature is that a coating layer is formed by applying a viscoelastic adhesive mainly composed of a synthetic resin on the inner side surface. In this case, it is preferable to use a rust preventive agent as the fixing agent.

  According to a second aspect of the present invention, there is provided a gooseneck type microphone device in which a microphone unit is disposed at a distal end portion of a support column and a support base or an attachment portion to a counterpart material is disposed at a proximal end portion. The most important feature is that it is formed by using a flexible pipe partially having the above structure.

  According to the first aspect of the present invention, since the viscoelastic coating layer is formed at least on the inner surface located at the substantially central portion in the length direction of the flexible pipe, the flexible pipe The coating layer can effectively prevent the metal powder generated by repeatedly bending the pipe from falling.

  In addition, when an anticorrosive agent is used as the fixing agent, even if a mild steel wire is used as the triangular wire rod and metal powder with high rusting properties may be generated, the outer side of the flexible pipe will generate. Rust can be surely prevented.

  On the other hand, according to the invention according to claim 3, since the flexible pipe having the viscoelastic coating layer formed on the inner surface is used as a part of the support column, it is flexible to adjust the position of the microphone unit. Even if the pipe is bent repeatedly, the coating layer can effectively prevent the generated metal powder from falling inside the column, so it is provided on the base end side of the column when the metal powder falls. Therefore, it is possible to reliably prevent a failure such as a short circuit that is likely to occur in a circuit board or an output connector, and to use it stably over a long period of time.

  FIG. 1 is an enlarged end view showing the main part of the flexible pipe according to the first invention of the present invention. The flexible pipe 11 is a cylindrical round wire 14 made of a hard metal such as steel. Round wire rods 14 and 14 that are adjacent to each other with a triangular wire 16 made of a plastically deformable metal such as brass or a copper alloy wound on one side corner portion 17 side of the tension coil spring body 13 that is densely wound. It is formed by interposing in the length direction while being wound so as to be sandwiched between each other.

  That is, the flexible pipe 11 having an appropriate caliber and length may be restored to its original state when it is bent, or may hang down when a required load is applied to its upper end side. In order to prevent the occurrence of bending, the balance between the degree of restoring force generated on the coil spring body 13 side and the degree of frictional force generated between the coil spring body 13 and the triangular wire 16 is artificially bent and deformed. The position after being formed can be maintained as it is.

  In addition, a coating layer 22 is formed on the inner side surface 12 of the flexible pipe 11 by applying a viscoelastic fixing agent 23 mainly composed of a synthetic resin. As the fixing agent 23 used here, a viscoelastic material mainly composed of a synthetic resin such as “ThreeBond 1401” manufactured by ThreeBond Co., Ltd., which is used for preventing loosening of screws or preventing rusting. A certain thing can be used conveniently.

  In this case, when the triangular wire 16 is wound around the coil spring body 13 side, the coating layer 22 is applied by sequentially supplying the fixing agent 23 to the inner surface 12 side thereof, thereby applying one side corner portion of the triangular wire 16. 17 and an inner portion where the adjacent round wire rods 14 adjacent to each other under pressure contact with the one side corner portion 17 are covered and formed as shown in FIG. Will be.

  FIG. 2 shows an example of the gooseneck type microphone device according to the second invention formed so that the flexible pipe 11 shown in FIG. 1 is incorporated in a part of a column and can be attached to a mating member installed on a desk or the like. It is explanatory drawing which shows.

  According to the figure, the entire gooseneck type microphone device 31 is disposed on a support column 32 functioning as a stand arm, a microphone unit 42 attached to the distal end side of the support column 32, and a proximal end side of the support column 32. It is formed with an attachment portion 52 that can be fixed in position, for example, by screwing it to an attachment material provided in advance on a desk or the like.

  Of these, the support column 32 is interposed between a tube main body portion 33 made of a metal pipe material having an appropriate length and the distal end side of the tube main body portion 33 so as to connect the microphone unit 42 side in a freely adjustable manner. 1 in which the pipe main body part 33 is connected to the attachment part 52 so that the position of the pipe main body part 33 is adjustable. It forms with the other side bending pipe part 35 which consists of the flexible pipe 11 to show.

  Further, the one-side bent tube portion 34 has a distal end portion at a base portion 43 provided at a corresponding portion of the microphone unit 42 and a base portion at a distal end base portion 33 a provided at a corresponding portion of the tube main body portion 33. The end portions are respectively connected and integrated by being inserted and fixed.

  Further, the other side bent tube portion 35 has a distal end portion at a base end cap portion 33 b provided at a corresponding portion of the tube main body portion 33, and a base portion 53 provided at a corresponding portion of the attachment portion 52. The base end portions are integrally connected by being inserted and fixed.

  Next, the use of the gooseneck type microphone device 31 according to the second invention will be described together with the operation and effect of the flexible pipe 11 according to the first invention. This can be installed by fixing the position with respect to a mating member provided on a desk or the like.

  Further, when the speaker uses the gooseneck type microphone device 31, the position of the microphone unit 42 attached to the distal end side of the support column 32 is adjusted by the speaker so that the microphone unit 42 faces the mouth (sound source).

  The position adjustment of the microphone unit 42 at this time is performed through the one side bent tube portion 34 and the other side bent tube portion 35 constituting the support column 32. That is, a preferred position determined by the relationship with the mouth (sound source) by bending to the speaker side to some extent via the other side bent tube portion 35 and further bending via the one side bent tube portion 34. Can be fine-tuned.

  In addition, the position adjustment by such bending is repeatedly performed every time different speakers are used. In this case, each of the one side bent tube portion 34 and the other side bent tube portion 35 is formed using the flexible pipe 11 having the structure shown in FIG.

  For this reason, the one side bent tube portion 34 and the other side bent tube portion 35 are each bent by the frictional force between the coil spring body 13 and the triangular wire 16 generated to maintain the bent position. For example, the triangular wire 16 side made of a copper alloy having a lower hardness than steel is scraped to the high hardness round wire 14 side made of steel or the like to generate metal powder.

  However, the flexible pipe 11 used for the one-side bent tube portion 34 and the other-side bent tube portion 35 has a viscoelastic coating on at least the inner side surface 12 located at a substantially central portion in the length direction. Since the layer 22 is formed, the fall of the metal powder generated can be reliably prevented by enclosing the metal powder with the coating layer 22.

  Therefore, the gooseneck type microphone device 31 can prevent the generated metal powder from dropping in the support column 32 and falling on the board with the electronic circuit or the output connector disposed on the mounting portion 52 side. Therefore, it is possible to reliably prevent a failure such as a short circuit derived from the falling metal powder and to use it stably over a long period of time.

  In addition, when a fixing agent 23 for forming the coating layer 22 is used, a metal powder having high rusting property may be generated by using a mild steel wire as the triangular wire 16. However, it is possible to reliably prevent the outside of the flexible pipe 11 from rusting.

  Moreover, since the flexible pipe 11 is used for the support | pillar 32, the gooseneck type | mold microphone apparatus 31 produces | generates the reverberation sound by mechanical resonance which arises when an impact is given by hitting the microphone unit 42 side by hand. It can also be mitigated through the viscoelastic coating layer 22 formed on the inner surface 12.

  The above is the description of the present invention based on the illustrated example, and the specific configuration is not limited thereto. For example, the flexible pipe 11 employs a structure in which the triangular wire 16 side is held by friction and plastic deformation with respect to the tension coil spring body 13 side. Therefore, when the end portion is cut, the triangular wire 16 side easily rewinds. Easy to spring. Such rewinding of the triangular wire 16 side is suppressed not only at the end portion of the flexible pipe 11 but at the entire contact portion covering the entire length of the round wire rods 14 and 14 with the triangular wire rod 16 sandwiched between them. Is desirable. From such a point of view, it is desirable that the flexible pipe 11 according to the first invention forms the coating layer 22 of the fixing agent 23 over the entire length of the inner surface 12 thereof.

  Further, the gooseneck type microphone device 31 according to the second invention may be configured such that the entire support 32 is formed using the flexible pipe 11 according to the first invention. Furthermore, the gooseneck type microphone device 31 may include a support base as shown in FIG. 3 in place of the attachment portion 52 so that it can be placed on a desk, for example.

The end view which expands and shows the principal part of the flexible pipe which concerns on 1st invention. The perspective view which shows an example of the gooseneck type microphone apparatus based on 2nd invention formed by incorporating the flexible pipe shown in FIG. 1 in a part of support | pillar. 1 is an overall perspective view of a gooseneck type microphone device disclosed in Patent Document 1 as a conventional example. The longitudinal cross-sectional view which shows partially the structure of the flexible pipe which comprises the support | pillar in a gooseneck type | mold microphone apparatus. FIG. 5 is an end view showing the main part of FIG. 4 in an enlarged state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Flexible pipe 12 Inner side surface 13 Tension | pulling coil spring body 14 Round wire material 16 Triangular wire material 17 One side corner | angular part 22 Cover layer 23 Adhesive agent 31 Gooseneck type microphone apparatus 32 Support | pillar 33 Pipe | tube main-body part 33a Tip end part 33b Base end part 34 One side Bent tube portion 35 Other side bent tube portion 42 Microphone unit 43 Base portion 52 Mounting portion 53 Base portion

Claims (3)

A triangular wire rod made of plastic deformable metal is wound around a tension coil spring body formed using a round wire rod made of hard metal so that one side corner portion is sandwiched between the adjacent round wire rods. In flexible pipes that are formed in the length direction,
A flexible pipe characterized in that a coating layer is formed by applying a viscoelastic adhesive mainly composed of a synthetic resin to at least an inner surface located at a substantially central portion in the longitudinal direction.   The flexible pipe according to claim 1, wherein the fixing agent has rust prevention properties. In the gooseneck type microphone device in which the microphone unit is arranged at the distal end portion of the support column, and the attachment portion to the support base or the counterpart material is arranged at the proximal end portion.
The gooseneck microphone device according to claim 1, wherein the support column is formed at least in part using the flexible pipe according to claim 1 or 2.

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