JP2006217141A - Hanging microphone and microphone cable for hanging microphone - Google Patents

Hanging microphone and microphone cable for hanging microphone Download PDF

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JP2006217141A
JP2006217141A JP2005026235A JP2005026235A JP2006217141A JP 2006217141 A JP2006217141 A JP 2006217141A JP 2005026235 A JP2005026235 A JP 2005026235A JP 2005026235 A JP2005026235 A JP 2005026235A JP 2006217141 A JP2006217141 A JP 2006217141A
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microphone
hanging
shape memory
memory alloy
alloy wire
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JP4508895B2 (en
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Yutaka Akino
裕 秋野
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Audio Technica KK
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Audio Technica KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a hanging microphone used by being hanged from a ceiling via a microphone cable, the hanging microphone of which the sound collection direction is easily adjusted and changed after being hanged. <P>SOLUTION: In the hanging microphone used by hanging a microphone unit from the ceiling via the microphone cable, a shape memory alloy wire 120 expanded/contracted in an axial direction is embedded into an outer sheath of the microphone cable 100 for hanging the microphone unit, a power application DC power supply 130 is connected between both ends of the shape memory alloy wire 120 and the sound collection direction of the microphone unit can be adjusted by contracting the shape memory alloy wire 120 by the power application heating thereby displacing the microphone cable 100 in a twisted direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、マイクケーブルを介して天井に吊り下げて使用されるハンギングマイクロホンに関し、さらに詳しく言えば、吊り下げられたマイクロホンユニットの収音方向を可変する技術に関するものである。   The present invention relates to a hanging microphone used by being suspended from a ceiling via a microphone cable. More specifically, the present invention relates to a technique for changing the sound collection direction of a suspended microphone unit.

図２に示すように、ハンギングマイクロホンはマイクロホンユニット１０をマイクケーブル１１を介して天井に吊り下げた状態で使用される。主として、ステージでの収音や教会での聖歌隊の歌唱などの収音に用いられ、通常は恒久的に設置される。   As shown in FIG. 2, the hanging microphone is used in a state where the microphone unit 10 is suspended from the ceiling via the microphone cable 11. Mainly used for collecting sounds on stage and choir singing in churches, usually installed permanently.

音源に対するマイクロホンユニット１０のαで示す上下方向の角度調整は、両端に設けられたコイル部１２ａ，１２ａによりマイクケーブル１１に取り付けられる針がね状の角度調整具１２によって比較的容易に行うことができるが、βで示す左右の収音方向の調整にはかなりの手間がかかる。   The angle adjustment in the vertical direction indicated by α of the microphone unit 10 with respect to the sound source can be relatively easily performed by the needle-shaped angle adjuster 12 attached to the microphone cable 11 by the coil portions 12a and 12a provided at both ends. However, it takes a lot of time to adjust the left and right sound collection directions indicated by β.

すなわち、吊り下げ用のマイクケーブル１１は外径が３〜６ｍｍ程度と比較太いケーブルで、通常、設置場所には円形に巻束ねた状態で梱包されて搬入される。したがって、巻癖がついている。吊り下げに際しては、その巻癖をほぐすようにしているが、それには時間がかかるばかりでなく、十分なまでにはほぐし得ない。   That is, the hanging microphone cable 11 is a comparatively thick cable having an outer diameter of about 3 to 6 mm. Usually, the microphone cable 11 is packed and carried in a circularly wound state at the installation location. Therefore, it has a roll. When hanging, the roll is loosened, but it takes time, and it cannot be loosened enough.

そのため、マイクロホンユニット１０を吊り下げた場合、マイクロホンユニット１０の収音方向がマイクケーブル１１を軸として回転してしまう。また、気温の変化などによってもマイクケーブル１１にねじれが発生し、マイクロホンユニット１０の収音方向が回転してしまうことがある。   Therefore, when the microphone unit 10 is suspended, the sound collection direction of the microphone unit 10 rotates around the microphone cable 11. In addition, the microphone cable 11 may be twisted due to a change in temperature and the sound collection direction of the microphone unit 10 may be rotated.

そこで、マイクロホンユニット１０を吊り下げたのち、テグスなどの紐１３で例えば２方向もしくは３方向から引っ張ることにより、マイクロホンユニット１０の回転を防止するようにしているが、場所が天井付近で高いこともあって、その作業は脚立上での作業となりかなりの手間がかかる。また、一度設定した収音方向を変更する場合にも、同様に手間がかかる。   Therefore, after the microphone unit 10 is suspended, the microphone unit 10 is prevented from rotating by, for example, pulling it from two or three directions with a string 13 such as a teg. However, the location may be high near the ceiling. Therefore, the work is a work on a stepladder and takes a lot of time and effort. Similarly, it takes time to change the sound collection direction once set.

したがって、本発明の課題は、マイクケーブルを介して天井に吊り下げて使用されるハンギングマイクロホンにおいて、吊り下げ後における収音方向の調整や変更を容易に行えるようにすることにある。   Accordingly, an object of the present invention is to make it possible to easily adjust or change the direction of sound collection after hanging in a hanging microphone that is suspended from a ceiling via a microphone cable.

上記課題を解決するため、本発明は、マイクロホンユニットをマイクケーブルを介して天井に吊り下げて使用するハンギングマイクロホンにおいて、上記マイクケーブルの外皮内に軸方向に伸縮する形状記憶合金線を螺旋状に埋設するとともに、上記形状記憶合金線の両端に通電用の直流電源を接続してなることを特徴としている。   In order to solve the above-described problems, the present invention provides a hanging microphone in which a microphone unit is suspended from a ceiling via a microphone cable, and a shape memory alloy wire that expands and contracts in the axial direction in the outer shell of the microphone cable is spirally formed. In addition to being embedded, a DC power supply for energization is connected to both ends of the shape memory alloy wire.

本発明には、好ましい態様として、上記直流電源から上記形状記憶合金線に供給する通電量を制御する制御手段を備える態様と、上記形状記憶合金線の温度を検出する温度センサを備え、上記制御手段は上記温度センサからの検出温度信号が一定となるように上記通電量を制御する態様とが含まれる。   In a preferred aspect, the present invention includes a control unit that controls the amount of current supplied from the DC power source to the shape memory alloy wire, and a temperature sensor that detects the temperature of the shape memory alloy wire. The means includes a mode of controlling the energization amount so that the detected temperature signal from the temperature sensor is constant.

また、本発明には、マイクロホンユニットを天井に吊り下げるためのハンギングマイクロホン用マイクケーブルにおいて、外皮内に軸方向に伸縮する形状記憶合金線が螺旋状に埋設されていることを特徴とするハンギングマイクロホン用マイクケーブルも含まれる。   According to the present invention, in the hanging microphone microphone cable for suspending the microphone unit from the ceiling, the hanging microphone is characterized in that the shape memory alloy wire extending and contracting in the axial direction is helically embedded in the outer skin. A microphone cable is also included.

形状記憶合金線は通電に伴う発熱によって収縮し、冷却（放熱）時には伸張する特異な性質を有する。本発明によれば、このような特異な動きを示す形状記憶合金線をマイクケーブルの外皮内に螺旋状に埋設したことにより、その伸縮に伴ってマイクケーブルが撚り方向に変位するため、直流電源からの通電量を制御することでリモートコントロール的にマイクロホンユニットの収音方向を可変することができる。   The shape memory alloy wire has a unique property of contracting due to heat generated by energization and expanding during cooling (heat dissipation). According to the present invention, since the shape memory alloy wire exhibiting such a unique movement is helically embedded in the outer cover of the microphone cable, the microphone cable is displaced in the twisting direction along with the expansion and contraction, so that the direct current power supply By controlling the energization amount from the remote, the sound collection direction of the microphone unit can be varied remotely.

また、温度センサにより形状記憶合金線の温度を検出し、制御手段により、形状記憶合金線の温度がほぼ一定となるように通電量を制御することにより、マイクロホンユニットの収音方向を所望とする方向に安定して維持することができる。   Further, the temperature of the shape memory alloy wire is detected by the temperature sensor, and the control unit controls the energization amount so that the temperature of the shape memory alloy wire becomes substantially constant, thereby making the sound collecting direction of the microphone unit desired. It can be stably maintained in the direction.

次に、図１により本発明の実施形態について説明するが、本発明はこれに限定されるものではない。図１は本発明の要部を示す模式図で、同図には吊り下げ用のマイクケーブルの一部拡大斜視図とその制御系とが含まれている。なお、ハンギングマイクロホンの全体的な構成（マイクケーブルによりマイクロホンユニットを吊す点）については先に説明した図２を参照されたい。   Next, an embodiment of the present invention will be described with reference to FIG. 1, but the present invention is not limited to this. FIG. 1 is a schematic view showing the main part of the present invention, which includes a partially enlarged perspective view of a hanging microphone cable and its control system. For the overall configuration of the hanging microphone (the point where the microphone unit is suspended by the microphone cable), refer to FIG. 2 described above.

図１において、本発明のハンギングマイクロホンに用いられるマイクケーブルを参照符号１００として示す。このマイクケーブル１００は、ホット側の信号線１１１とコールド側の信号線１１２とを有する２芯ケーブルで、その全体が外皮（シース）１１３により被覆されている。図示しないが、シールド被覆線を備えていてもよい。   In FIG. 1, a microphone cable used for the hanging microphone of the present invention is indicated by reference numeral 100. The microphone cable 100 is a two-core cable having a hot-side signal line 111 and a cold-side signal line 112, and is entirely covered with an outer sheath (sheath) 113. Although not shown, a shield covered wire may be provided.

このマイクケーブル１００により、図２に示すようにマイクロホンユニット１０が天井から吊り下げられるのであるが、マイクロホンユニット１０の収音方向をβ方向に調整，変更可能とするため、マイクケーブル１００の外皮１１３内に形状記憶合金線１２０が螺旋状に埋設される。   The microphone unit 10 is suspended from the ceiling by the microphone cable 100 as shown in FIG. 2, but in order to be able to adjust and change the sound collection direction of the microphone unit 10 in the β direction, the outer skin 113 of the microphone cable 100 is used. A shape memory alloy wire 120 is spirally embedded therein.

この例では、形状記憶合金線１２０の埋設個所を外皮１１３内としているが、外皮１１３の外周面に溝を螺旋状に形成し、その溝に沿って形状記憶合金線１２０を接着材などにより一体的に固定するようにしてもよい。いずれの場合も、形状記憶合金線１２０の螺旋ピッチは任意に決められてよい。   In this example, the embedding portion of the shape memory alloy wire 120 is in the outer skin 113, but a groove is formed in a spiral shape on the outer peripheral surface of the outer skin 113, and the shape memory alloy wire 120 is integrated with an adhesive or the like along the groove. May be fixed. In any case, the helical pitch of the shape memory alloy wire 120 may be arbitrarily determined.

形状記憶合金（Ｓｈａｐｅ Ｍｅｍｏｒｙ Ａｌｌｏｙ）線としては、例えばトキ・コーポレーション社製のバイオメタル（商品名）を例示することができる。この形状記憶合金線はＴｉ−Ｎｉ系もしくはＴｉ−Ｎｉ−Ｃｕ系合金で、加熱により収縮し（収縮量，原寸の約５％）、冷却すると伸張する特性を有する。   As a shape memory alloy (Shape Memory Alloy) wire, for example, Biometal (trade name) manufactured by Toki Corporation can be exemplified. This shape memory alloy wire is a Ti—Ni-based or Ti—Ni—Cu-based alloy, and contracts by heating (shrinkage amount, approximately 5% of the original size) and has a characteristic of expanding when cooled.

本発明では、形状記憶合金線１２０を通電加熱するため、その両端に接続される直流電源１３０を備える。この直流電源１３０より形状記憶合金線１２０に通電して発熱させると、形状記憶合金線１２０が収縮し、これに伴ってマイクケーブル１００がθで示す撚り方向に変位する。これを利用することにより、マイクロホンユニット１０の収音方向をマイクケーブル１００を軸とするβ方向に調整することができる。   In the present invention, in order to energize and heat the shape memory alloy wire 120, a DC power source 130 connected to both ends thereof is provided. When the shape memory alloy wire 120 is energized from the DC power source 130 to generate heat, the shape memory alloy wire 120 contracts, and accordingly, the microphone cable 100 is displaced in the twisting direction indicated by θ. By utilizing this, the sound collection direction of the microphone unit 10 can be adjusted to the β direction with the microphone cable 100 as an axis.

形状記憶合金線１２０の収縮量は通電量（発熱量）に比例することから、マイクケーブル１００の撚り方向の変位量を調整可能とするため、直流電源１３０に可変直流電源を用いるとともに、操作部１４１を含む制御手段１４０により直流電源１３０を制御して、形状記憶合金線１２０に対する通電量を可変とすることが好ましい。これによれば、操作部１４１によりリモートコントロール的にマイクロホンユニット１０の収音方向を調整することができる。   Since the contraction amount of the shape memory alloy wire 120 is proportional to the energization amount (heat generation amount), a variable DC power source is used as the DC power source 130 in order to make it possible to adjust the displacement amount of the microphone cable 100 in the twist direction. It is preferable that the DC power supply 130 is controlled by the control means 140 including 141 so that the energization amount to the shape memory alloy wire 120 is variable. According to this, the sound collection direction of the microphone unit 10 can be adjusted by the operation unit 141 in a remote control manner.

また、別の例として、マイクケーブル１００に形状記憶合金線１２０の温度を検出する例えば抵抗線からなる温度センサー１４２を設け、その温度センサー１４２の検出温度信号を制御手段１４０に入力する。そして、制御手段１４０で、その検出温度が操作部１４１にて設定された温度（変位量の温度換算値）となるように、直流電源１３０の通電量を制御することにより、マイクロホンユニット１０の収音方向を所望とする方向に安定して維持することができる。   As another example, the microphone cable 100 is provided with a temperature sensor 142 configured to detect the temperature of the shape memory alloy wire 120, for example, a resistance wire, and a temperature signal detected by the temperature sensor 142 is input to the control unit 140. Then, the control unit 140 controls the energization amount of the DC power supply 130 so that the detected temperature becomes the temperature set in the operation unit 141 (the temperature converted value of the displacement amount). The sound direction can be stably maintained in a desired direction.

以上説明したように、本発明によれば、操作部１４１を操作して形状記憶合金線１２０に対する通電量を制御することにより、作業者は居ながらにしてマイクロホンユニット１０の収音方向を調整することができる。また、一端設定した収音方向をも容易に変更することができる。なお、マイクロホンユニット１０の上下方向の角度調整は、従来どおり図２に示す針がね状の角度調整具１２によって行えばよい。   As described above, according to the present invention, the operation unit 141 is operated to control the amount of current applied to the shape memory alloy wire 120, thereby adjusting the sound collection direction of the microphone unit 10 while the operator is present. be able to. In addition, the sound collection direction that is set once can be easily changed. Note that the angle adjustment in the vertical direction of the microphone unit 10 may be performed with the needle-shaped angle adjuster 12 shown in FIG.

本発明の要部であるマイクケーブルの一部拡大斜視図および形状記憶合金線の制御系を含む模式図。The partial schematic perspective view of the microphone cable which is the principal part of this invention, and the schematic diagram containing the control system of a shape memory alloy wire. 従来のハンギングマイクロホンの設置例を示す模式図。The schematic diagram which shows the example of installation of the conventional hanging microphone.

符号の説明Explanation of symbols

１０ マイクロホンユニット
１２ 角度調整具１２
１００ 吊り下げ用のマイクケーブル
１１１，１１２ 信号線
１１３ 外皮
１２０ 形状記憶合金線
１３０ 直流電源
１４０ 制御手段
１４１ 操作部
１４２ 温度センサ 10 Microphone unit 12 Angle adjuster 12
DESCRIPTION OF SYMBOLS 100 Microphone cable for suspension 111,112 Signal line 113 Outer skin 120 Shape memory alloy wire 130 DC power supply 140 Control means 141 Operation part 142 Temperature sensor

Claims (4)

マイクロホンユニットをマイクケーブルを介して天井に吊り下げて使用するハンギングマイクロホンにおいて、
上記マイクケーブルの外皮内に軸方向に伸縮する形状記憶合金線を螺旋状に埋設するとともに、上記形状記憶合金線の両端に通電用の直流電源を接続してなることを特徴とするハンギングマイクロホン。 In a hanging microphone that uses a microphone unit suspended from the ceiling via a microphone cable,
A hanging microphone characterized in that a shape memory alloy wire extending and contracting in the axial direction is embedded spirally in the outer shell of the microphone cable, and a DC power supply for energization is connected to both ends of the shape memory alloy wire. 上記直流電源から上記形状記憶合金線に供給する通電量を制御する制御手段を備えていることを特徴とする請求項１に記載のハンギングマイクロホン。   2. The hanging microphone according to claim 1, further comprising control means for controlling an energization amount supplied from the DC power source to the shape memory alloy wire. 上記形状記憶合金線の温度を検出する温度センサを備え、上記制御手段は上記温度センサからの検出温度信号が一定となるように上記通電量を制御することを特徴とする請求項２に記載のハンギングマイクロホン。   The temperature sensor which detects the temperature of the said shape memory alloy wire is provided, The said control means controls the said electricity supply amount so that the detected temperature signal from the said temperature sensor may become fixed. Hanging microphone. マイクロホンユニットを天井に吊り下げるためのハンギングマイクロホン用マイクケーブルにおいて、
外皮内に軸方向に伸縮する形状記憶合金線が螺旋状に埋設されていることを特徴とするハンギングマイクロホン用マイクケーブル。 In the hanging microphone microphone cable for hanging the microphone unit on the ceiling,
A microphone cable for a hanging microphone, wherein a shape memory alloy wire extending and contracting in an axial direction is embedded in a helix in an outer skin.
JP2005026235A 2005-02-02 2005-02-02 Hanging microphone Expired - Fee Related JP4508895B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008096600A1 (en) 2007-02-06 2008-08-14 Honda Motor Co., Ltd. Electric motor, rotor structure, and magnetic machine
JP2010074223A (en) * 2008-09-16 2010-04-02 Audio Technica Corp Gooseneck microphone device
JP2012060277A (en) * 2010-09-07 2012-03-22 Audio Technica Corp Manufacturing method for flexible shaft and microphone

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JPH076635A (en) * 1993-06-18 1995-01-10 Sony Corp Signal transmission cable
JPH08110480A (en) * 1994-10-12 1996-04-30 Olympus Optical Co Ltd Flexible tube
JP2000161543A (en) * 1998-12-01 2000-06-16 Terumo Corp Flexible pipe
JP2003281943A (en) * 2002-03-20 2003-10-03 Sony Corp Signal transmitting cable and electronic device

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Publication number Priority date Publication date Assignee Title
JPS63285339A (en) * 1987-05-18 1988-11-22 Tokieda Naomitsu Contact breaker
JPH01107879A (en) * 1987-10-21 1989-04-25 Toshiba Corp Apparatus for removing adhered matter in pipe
JPH0333994U (en) * 1989-08-12 1991-04-03
JPH0397428A (en) * 1989-09-12 1991-04-23 Olympus Optical Co Ltd Curving operation device for tubular fitting tool
JPH0543691U (en) * 1991-10-31 1993-06-11 株式会社オーデイオテクニカ Microphone support
JPH076635A (en) * 1993-06-18 1995-01-10 Sony Corp Signal transmission cable
JPH08110480A (en) * 1994-10-12 1996-04-30 Olympus Optical Co Ltd Flexible tube
JP2000161543A (en) * 1998-12-01 2000-06-16 Terumo Corp Flexible pipe
JP2003281943A (en) * 2002-03-20 2003-10-03 Sony Corp Signal transmitting cable and electronic device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008096600A1 (en) 2007-02-06 2008-08-14 Honda Motor Co., Ltd. Electric motor, rotor structure, and magnetic machine
JP2010074223A (en) * 2008-09-16 2010-04-02 Audio Technica Corp Gooseneck microphone device
JP2012060277A (en) * 2010-09-07 2012-03-22 Audio Technica Corp Manufacturing method for flexible shaft and microphone

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