JP2006254218A - Gooseneck microphone apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gooseneck microphone apparatus in which a flexible pipe side and an opposite material side can be electrically conducted without using an adhesive, mechanical connection strength is also ensured and at the same time, reduction of vibration noise can also be attained. <P>SOLUTION: The gooseneck microphone apparatus 11 comprises a stand arm 12 which is connected to a microphone unit side and the side of another member 23 including an installation stand, at least partially includes a flexible pipe 13 and is electrically conducted as a whole. The flexible pipe 13 is connected with the opposite side material 22 via a connecting portion 16 with the opposite side material 22, provided at its connecting terminal side. In such a gooseneck type microphone apparatus 11, the connecting portion 16 includes a small-diameter part 18 of which the diameter is reduced circumferentially while remaining the side of its open edge 17a, the small-diameter part 18 is inserted into a mouthpiece part 24 that the opposite side material 22 comprises, while interposing a conductive cloth 35, and the side of a mouthpiece part 24 is caulked and fixed, so that the flexible pipe 13 can be connected so as to be hardly disconnected. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a microphone device, and more particularly to a technology related to a gooseneck type microphone device in which a microphone unit is supported by a stand arm including a flexible pipe.

  One type of microphone device is a gooseneck type microphone device that is used on a desk in a conference hall or the like. FIG. 3 is an overall perspective view showing a conventional example of the gooseneck type microphone device disclosed in Patent Document 1. As shown in FIG.

  According to the figure, the gooseneck type microphone device 1 includes a stand arm 2 composed of a flexible pipe 3 having a proximal end fixed to the support base 5 and a microphone unit 6 attached to the distal end. ing. Therefore, the position of the microphone unit 6 can be adjusted to a suitable position with respect to the sound source by the flexibility of the flexible pipe 3.

In addition, the flexible pipe 3 has a base 5 provided on the connection side of the support base 5 and the microphone unit 6 which are mating members, thereby ensuring a shielding property that electrically connects each other, and mechanical. As a result, the whole is connected integrally.
JP-A-9-229292

  By the way, as is well known, the flexible pipe 3 creates a tension coil spring that bears a restoring force with a round wire material such as steel, and forms a gap between the round wire materials of the tension coil spring from above. It is formed by sandwiching a triangular wire such as a copper alloy that exhibits a triangular shape and is plastically deformed.

  For this reason, the flexible pipe 3 self-holds its deformed state when it is bent and deformed to an arbitrary position as a result of mutual contact under the strong frictional force generated between the round wire and the triangular wire. Will be able to.

By the way, if this flexible pipe 3 is cut | disconnected, the winding will return and the edge part located in the nozzle | cap | die part 4 side will expand in diameter. The degree of diameter expansion at this time is proportional to the amount of rewinding, but is not necessarily constant. For this reason, the nozzle | cap | die part 4 which introduce | transduces the edge part of the flexible pipe 3 will be formed previously providing the comparatively generous inner diameter.

  Therefore, when the end portion of the flexible pipe 3 is introduced into the base portion 4, a gap is generated without being in close contact with each other. For this reason, the mutual connection parts need to be mechanically and firmly connected while being electrically connected in a state where the gap is eliminated.

  The reason is that when a signal line (not shown) is wired to the microphone unit 6 side through the stand arm 2 made of the flexible pipe 3 and the shield property is not secured to the entire stand arm 2, This is because external noise may enter the signal line due to electrical coupling.

  In addition, when the microphone unit 6 is a condenser microphone, a power line and an unbalanced signal line are inserted through the stand arm 2. In particular, a lot of noise tends to occur.

  On the other hand, regarding the mechanical connection strength between the end of the flexible pipe 3 and the base 4, the flexible pipe 3 is frequently bent and deformed during use, so that the stress is easily concentrated on the base 4 side. Or is easily removed.

  Therefore, conventionally, an adhesive is interposed between the flexible pipe 3 and the base part 4. As an adhesive used in this case, it is generally necessary to use a conductive adhesive and an epoxy adhesive in combination since it is necessary to satisfy both a demand for ensuring electrical continuity and a demand for mechanically strong connection. Has been done.

  By the way, the conductive adhesive contains metal powder such as silver in its components, so if it is displaced after curing, the electrical resistance value will not be stable and noise will be generated, and the impact resistance will be reduced. Tend to.

  For this reason, the end part of the flexible pipe 13 and the base part 42 can increase the mechanical strength by supplementing the brittleness of the conductive adhesive by using the above-mentioned epoxy adhesive together. It is connected.

  However, when the microphone device 11 is installed on a desk and used, the mutual connection strength becomes high, so vibrations and shocks applied to the desk can be reduced at the mutual connection site. There is a problem that vibration noise is easily transmitted to the microphone unit 6 side.

  As a technique for avoiding such inconvenience, an adhesive capable of maintaining elasticity even at the time of curing can be used for the mutual connection part for the purpose of reducing vibration and impact, but the flexible pipe 3 is strongly pulled. On the contrary, there was a problem that it was easy to come off.

  In view of the above-mentioned problems of the prior art, the present invention secures stable electrical continuity and mechanical connection strength over a long period of time without using an adhesive for the connection part between the flexible pipe and the counterpart material, An object of the present invention is to provide a gooseneck type microphone device capable of simultaneously reducing vibration noise.

  The present invention has been made in order to achieve the above object. The microphone unit is supported on one end side, the other end side is connected to another member including an installation base, and at least a part thereof has a flexible pipe. And the flexible pipe is connected to the counterpart material via a connection portion between the microphone unit provided on the connection end side and the counterpart material including the other member. In the gooseneck type microphone device, the connecting portion of the flexible pipe has a small-diameter portion formed by reducing the diameter in the circumferential direction while leaving the open edge side, and the base member provided on the connecting end side of the counterpart material has a small diameter portion. And inserting the small-diameter portion with a conductive cloth interposed therebetween, and caulking and fixing at least a portion including the opening edge of the base portion. The most important feature that pulled out is difficult connecting the pipes. In this case, the said conductive cloth can also be stickingly arrange | positioned to a small diameter part via a conductive adhesive.

  According to the present invention, the connecting portion of the flexible pipe is inserted into the base portion of the counterpart material with the conductive cloth interposed in the small diameter portion, and the caulking portion side is caulked to form a caulking portion. Therefore, even if an adhesive is not used as in the prior art, it can be mechanically and firmly connected to the counterpart material in a state of being electrically conducted. If a conductive adhesive is used at the same time as desired, a more reliable electrical conduction state can be ensured although an adhesion step is required.

  FIG. 1 is an explanatory diagram illustrating an arrangement relationship between a flexible pipe and a mating member provided in a stand arm constituting the present invention, omitting a part thereof. According to the figure, the gooseneck type microphone device 11 has a microphone unit (not shown) supported on one end side thereof, the other end side connected to another member 23 including an installation base, and a flexible pipe 13 at least in part thereof. It has a stand arm 12 that is electrically conductive as a whole.

  In this case, the flexible pipe 13 formed by a combination of the round wire 14 and the triangular wire 15 is connected via a connecting portion 16 between a mating member 22 including a microphone unit (not shown) provided on the connecting end side and the other member 23. Are connected to the mating member 22.

  That is, the connecting portion 16 provided in the end portion 17 where the flexible pipe 13 is located on the connecting end side with the mating member 22 has an appropriate circumferential direction of the portion excluding the open edge 17a side by using, for example, a rolling method. A small-diameter portion 18 formed by reducing the outer diameter is formed.

  The conductive cloth 35 is made of an elastic conductive cloth material (for example, conductive cloth SUI-78-5010T manufactured by Taiyo Wire Mesh Co., Ltd.) provided with appropriate length and width that can be arranged around the small diameter portion 18. It is formed using.

  On the other hand, the mating member 22 to which the flexible pipe 13 is connected is formed with a base part 24 that is freely inserted on the connecting part 16 side of the flexible pipe 13. The mating member 22 in the present specification is connected to the flexible pipe 13 integrally to form the stand arm 12 as a whole, as well as an installation stand as the other member 23 and a microphone unit (not shown). Includes hollow pipe material. Further, the base part 24 is integrally formed with the counterpart material 22 itself, although not shown in the figure, in addition to being screwed or fitted to the counterpart material 22 side as shown in the example of illustration. It may be.

  The base portion 24 is provided with a tubular portion 26 of an appropriate length extending from the base portion 25 toward one end thereof so that the connecting portion 16 of the flexible pipe 13 can be freely inserted, and projecting from the base portion 25 toward the other end portion. The male member 30 is formed with a male screw portion 30 that can be freely screwed with a female screw portion (not shown) of the mating member 22.

  In this case, the cylindrical portion 26 gives an inner diameter larger than the maximum outer diameter on the connecting portion 16 side in advance in consideration of the dimensions when the winding of the end portion 17 of the flexible pipe 13 is returned and expanded in diameter. The inlet 27 is formed.

  In addition, the outer peripheral portion 28 extending from the base portion 25 to the cylindrical portion 26 is formed to have a substantially frustoconical shape with a tapered taper. For this reason, the thickness of the cylindrical portion 26 is formed so as to gradually become thinner toward the introduction port 27. Therefore, the cylindrical part 26 can easily form the caulking part 29 by caulking it.

  The base part 42 has a through hole 32 that penetrates the male screw part 30 and the base part 25 and communicates with the cylindrical part 26 side, and a signal line (not shown) is provided through the through hole 32. Etc. can be inserted into the microphone unit side.

  FIG. 2 is a main part enlarged explanatory view showing the connecting part 16 of the flexible pipe 13 in the example shown in FIG. 1 and the base part 24 included in the mating member 22 connected to each other. According to the figure, the connecting part 16 of the flexible pipe 13 is inserted and arranged in the cylindrical part 26 of the base part 24 after the conductive cloth 35 is arranged around the small diameter part 18.

  In this case, the cylindrical portion 26 of the base portion 24 includes an opening edge 26 a by performing caulking processing for pressure deformation toward the small diameter portion 18 provided in the connecting portion 16 of the flexible pipe 13. The caulking portion 31 is formed at the corresponding portion, and the connecting portion 16 of the flexible pipe 13 can be securely held through the caulking portion 31.

  In addition, since the conductive cloth 35 is arranged around the small diameter portion 18 of the connecting portion 16 of the flexible pipe 13 in advance, the cap portion for the flexible pipe 13 through the caulking portion 31 while resisting the elasticity of the conductive cloth 35. It is possible to connect under a state where the mechanical connection strength on the 24th side is further increased. In particular, as shown in FIG. 2, an opening edge 26 a defining an introduction port 27 is formed between the round wire 14 and the triangular wire 15 constituting the flexible pipe 13 in the cylindrical portion 26 of the base portion 24. In the case where it is bitten so as to be hooked on the stepped portion 19 side, the connection strength can be increased and the connection can be made with difficulty in removal.

  Further, since the conductive cloth 35 can be brought into multi-point contact with both the small diameter portion 18 side of the flexible pipe 13 and the cylindrical portion 26 side of the base portion 24, the conductive cloth 35 is interposed between the flexible pipe 13 and the base portion 24. As a result, the electrical continuity with the mating member 22 can be ensured and can be connected to each other.

  Next, the operation of the present invention having the above-described configuration will be described based on the example shown in FIGS. 1 and 2. First, when trying to connect the mating member 22 to the end 17 of the stand arm 12, The conductive cloth 35 is arranged around the small diameter portion 18 provided on the connecting portion 16 located on the end portion 17 side of the flexible pipe 13, and then the connecting portion 16 is introduced from the introduction port 27 of the base portion 24 into the cylindrical portion 26. Insert.

  After the connecting portion 16 of the flexible pipe 13 is inserted into the cylindrical portion 26 of the base portion 24, the cylindrical portion 26 is pressurized toward the small diameter portion 18 to perform a caulking process to form a caulking portion 31. Then, the cylindrical portion 26 is fixed to the small diameter portion 18 side. In the caulking process, a plurality of slits are formed in the length direction of the cylindrical portion 26 perpendicular to the circumferential direction of the opening edge 26a, and the caulking portion 31 can be formed as a whole of each section.

  As described above, when the plurality of slits are formed in the length direction orthogonal to the circumferential direction of the opening edge 26a of the cylindrical portion 26 and the caulking portion 31 is formed as a whole of each section, the flexible pipe 13 side By causing the corresponding section to partially engage with the stepped portion 19, the mechanical connection strength can be further increased and the connection can be easily performed.

  When the caulking portion 31 is formed in this manner, the conductive cloth 35 interposed in the small diameter portion 18 is also pressed against the inner peripheral surface 29 of the cylindrical portion 26 with elasticity, and as a result, the caulking portion It is also possible to obtain a secondary effect that the mechanical connection strength produced by 31 can be further increased.

  In addition, since the intervening conductive cloth 35 can be brought into multi-point contact with both the small-diameter portion 18 and the cylindrical portion 26 in a planar manner, as a result, the flexible pipe 13 and the counterpart are used without using a conductive adhesive. A reliable conductive path can be formed with the material 22.

  Incidentally, the resistance value when conducting through the conductive adhesive as in the conventional example was about 1Ω, but the resistance value when the conductive cloth 35 is interposed in the present invention is 1/10 of the resistance value. It was lower than 0.1Ω, and it was confirmed that the electrical continuity was remarkably improved.

  Furthermore, since the conductive cloth 35 also has an effect of reducing the impact due to its elasticity, even if an impact or vibration is applied to the desk when the gooseneck microphone device 11 is fixed on the desk, the conductive cloth 35 vibrates due to its buffering action. Noise can be reduced.

  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 conductive cloth 35 having a larger thickness than the reduced diameter depth of the small diameter portion 18 can be used. Moreover, the conductive cloth 35 can also be arranged by interposing separately in the partial site | part, without arrange | positioning one piece in the small diameter part 18 in circulation. Thus, when interposing and arranging each separately in a partial site | part, it is desirable to stick on the small diameter part 18 side beforehand using a conductive adhesive.

  Further, the base part 24 provided in the counterpart material 22 can be made to correspond to these depending on whether the counterpart material 22 is a microphone unit or a hollow pipe material constituting the stand arm 12. It can be formed with a shape and a structure.

Explanatory drawing which illustrates the arrangement | positioning relationship of the flexible pipe with which the stand arm which comprises this invention, and the other party member are abbreviate | omitted that part. The principal part expansion explanatory drawing shown in the state which connected the connection part of the flexible pipe in the example shown in FIG. 1, and the nozzle | cap | die part with which a counterpart material is provided mutually. The whole perspective view which shows an example of the conventional gooseneck type microphone apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Gooseneck type microphone apparatus 12 Stand arm 13 Flexible pipe 14 Round wire 15 Triangular wire 16 Connection part 17 End part 17a Open edge 18 Small diameter part 19 Step part 22 Opposing material 23 Other member 24 Base part 25 Base part 26 Tubular part 26a Opening edge 27 Introduction Port 28 Outer Peripheral Area 29 Inner Peripheral Surface 30 Male Threaded Section 31 Caulked Section 32 Through-hole 35 Conductive Cloth

Claims (2)

A microphone unit is supported on one end side thereof, the other end side is connected to other members including an installation base, and at least a part thereof includes a flexible arm and has a stand arm that is electrically connected as a whole. The flexible pipe is a gooseneck type microphone device that is connected to the counterpart material via a connection portion of the counterpart material including the microphone unit and the other member provided on the connection end side.
The connecting portion of the flexible pipe has a small-diameter portion formed by reducing the diameter in the circumferential direction leaving the open edge side,
The flexible pipe is formed by inserting the small-diameter portion with a conductive cloth interposed therein and caulking and fixing a portion including at least the opening edge of the base portion into a base portion provided on the connection end side of the counterpart material. A gooseneck type microphone device characterized in that it is connected with difficulty in removal.   The gooseneck type microphone device according to claim 1, wherein the conductive cloth is attached to the small-diameter portion side through a conductive adhesive.

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