JP2010022585A - Shaking unit of biothesiometer - Google Patents

Shaking unit of biothesiometer Download PDF

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JP2010022585A
JP2010022585A JP2008187461A JP2008187461A JP2010022585A JP 2010022585 A JP2010022585 A JP 2010022585A JP 2008187461 A JP2008187461 A JP 2008187461A JP 2008187461 A JP2008187461 A JP 2008187461A JP 2010022585 A JP2010022585 A JP 2010022585A
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vibration
unit
probe
sensor
housing
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JP2010022585A5 (en
JP5270243B2 (en
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Daisuke Sakagami
大輔 阪上
Akira Honma
章 本間
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Rion Co Ltd
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Rion Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a shaking unit of a biothesiometer which reduces the vibration of a housing to such an extent that it will not influence measurement and can be made lightweight and small while maintaining measurement accuracy. <P>SOLUTION: The shaking unit 3 forms the biothesiometer together with an instrument body 1 and a forearm supporting base 2. The shaking unit 3 comprises a shaking portion 6 separated from the instrument body 1 and having a vibrator 5 projecting in the shaking direction, a sensor mounting portion 7 to be attached to the vibrator 5 of the shaking portion 6, a vibration sensor 12 and a load sensor 13 to be attached to the sensor mounting portion 7, a probe 8 to be attached to the load sensor 13, and the housing 11 supporting the shaking portion 6 through underside elastic bodies 9 and side-face elastic bodies 10. The total weight of the vibration sensor 12, the load sensor 13, and the sensor mounting portion 7 stands at a prescribed value, and the shaking portion 6 is arranged within the housing 11 so as to make the probe 8 project from the opening 11b of the top face 11a of the housing 11 and make the distance between the tip face 8a of the probe 8 and the top face 11a of the housing 11 in the shaking direction keep a prescribed range. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、振動障害を検査するための振動感覚測定装置の加振ユニットに関する。   The present invention relates to a vibration unit of a vibration sensation measuring apparatus for inspecting vibration disturbances.

振動障害としては、チェーンソーやグラインダなどの振動工具を使う作業により、血行不良・神経障害になり、手のしびれや痛みを感じ指が白くなる白蝋病などが知られている。このような振動障害の検査を行うために、加振ユニットのプローブに被験者の指を接触させ、被験者が感知する振動レベルを測定する装置が提案されている。   Known as a vibration disorder is white wax disease, which results in poor blood circulation and neuropathy due to work using vibration tools such as chainsaws and grinders, and numbness and pain in the hands, resulting in whitening of the fingers. In order to inspect such a vibration disturbance, an apparatus for measuring a vibration level sensed by the subject by bringing the subject's finger into contact with the probe of the excitation unit has been proposed.

検査においては、プローブの振動による刺激のみが被験者の指に与えられるようにしなければならず、装置自体の振動など被験者が感知する振動レベルの測定(閾値測定)に影響するものは排除しなければならない。例えば、加振ユニットを構成する加振部が、筐体に直接固定されると筐体が振動するため、その筐体に検査対象の指以外の指が触れると、被験者は振動を感知したと判断したり、筐体が振動することにより発生する音から振動を感知したと判断したりするという問題がある。   In the inspection, only the stimulus by the vibration of the probe should be applied to the subject's finger, and the influence on the measurement of the vibration level (threshold measurement) perceived by the subject such as the vibration of the device itself must be excluded. Don't be. For example, when the vibration unit constituting the vibration unit is directly fixed to the housing, the housing vibrates. Therefore, when a finger other than the finger to be inspected touches the housing, the subject senses the vibration. There is a problem that it is determined that the vibration is detected from the sound generated by the vibration of the housing.

人の皮膚感覚の閾値を決定するための装置としては、振動器をゴム又はコイルばねを介して平衡はりに装着し、指による所定の力が振動器の可振動部材に加えられるときを指示するインジケータを設け、所定の力が振動器の可振動部材に加えられた状態で振動器による可振動部材の振動を被験者が感知し、振幅の閾値レベルとその周波数を記録する感覚計が知られている(例えば、特許文献1参照)。   As a device for determining the threshold of human skin sensation, a vibrator is attached to a balanced beam via rubber or a coil spring, and indicates when a predetermined force by a finger is applied to the vibrating member of the vibrator. There is known a sensory meter that provides an indicator, a subject senses the vibration of the vibrating member by the vibrator while a predetermined force is applied to the vibrating member of the vibrator, and records the threshold level of the amplitude and its frequency. (For example, refer to Patent Document 1).

特開昭58−73337号公報Japanese Patent Laid-Open No. 58-73337

しかし、特許文献1に記載のような装置においては、ゴム又はコイルばねが振動器と平衡はりの間に取り付けられているだけであり、振動器の振動の影響及び被験者の指が可振動部材の先端に接触することによる影響を加振周波数である数Hzから百数十Hzの間で除去することができず、要求される測定精度を維持することができない。また、振動振幅の制御回路を振動器と同じ筐体の空間に配置しているので、この空間内の温度変化が測定精度に影響するという問題がある。   However, in the apparatus as described in Patent Document 1, the rubber or the coil spring is only attached between the vibrator and the balance beam, and the influence of the vibration of the vibrator and the subject's finger are the vibration member. The influence due to contact with the tip cannot be removed between several Hz to hundreds of tens of Hz as the excitation frequency, and the required measurement accuracy cannot be maintained. Further, since the vibration amplitude control circuit is arranged in the same housing space as the vibrator, there is a problem that the temperature change in this space affects the measurement accuracy.

本発明は、従来の技術が有するこのような問題点に鑑みてなされたものであり、その目的とするところは、筐体の振動を測定に影響しない程度に低減すると共に、測定精度を維持しつつ軽量で小型化が可能な振動感覚測定装置の加振ユニットを提供しようとするものである。   The present invention has been made in view of the above-described problems of the prior art. The object of the present invention is to reduce the vibration of the housing to the extent that it does not affect the measurement and maintain the measurement accuracy. It is an object of the present invention to provide a vibration unit of a vibration sensation measuring device that is lightweight and can be reduced in size.

上記課題を解決すべく請求項1に係る発明は、装置本体及び前腕の支持台と共に振動感覚測定装置を構成する加振ユニットであって、前記加振ユニットは前記装置本体から分離され、加振方向に突出する振動子を有する加振部と、この加振部の振動子に取り付けるセンサ取付部と、このセンサ取付部に取り付ける振動センサ及び荷重センサと、この荷重センサに取り付けるプローブと、前記加振部を下面弾性体と側面弾性体を介して支持する筐体からなり、前記振動センサ・前記荷重センサ・前記センサ取付部の総重量が所定重量であり、前記プローブが前記筐体の上面の開口部から突出すると共に、前記プローブの先端面と前記筐体の上面との加振方向の距離が所定範囲を保つように前記加振部を前記筐体内に配置したものである。   In order to solve the above-mentioned problem, an invention according to claim 1 is an excitation unit that constitutes a vibration sensation measuring device together with a device main body and a forearm support, wherein the vibration unit is separated from the device main body, A vibrating portion having a vibrator projecting in the direction, a sensor mounting portion attached to the vibrator of the vibrating portion, a vibration sensor and a load sensor attached to the sensor mounting portion, a probe attached to the load sensor, and the excitation The vibration unit, the load sensor, and the sensor mounting part have a predetermined weight, and the probe is mounted on the upper surface of the casing. The excitation unit is arranged in the casing so that the distance in the excitation direction between the tip surface of the probe and the upper surface of the casing is kept within a predetermined range while projecting from the opening.

請求項2に係る発明は、請求項1に記載の振動感覚測定装置の加振ユニットにおいて、検査する指のうち前記プローブに接する部分の周囲の部分を支持する周辺支持部を備えた保持ユニットを前記筐体に取り付けた。   According to a second aspect of the present invention, in the vibration unit of the vibration sensation measuring device according to the first aspect, a holding unit including a peripheral support portion that supports a peripheral portion of a finger to be inspected that is in contact with the probe. Attached to the housing.

請求項3に係る発明は、請求項1に記載の振動感覚測定装置の加振ユニットにおいて、検査する指のうち前記プローブに接する部分の周囲の部分を支持する周辺支持部を備えた保持ユニットを前記センサ取付部に取り付け、前記総重量に前記保持ユニットの重量を加えた重量が所定重量である。   According to a third aspect of the present invention, in the vibration unit of the vibration sensation measuring device according to the first aspect, a holding unit including a peripheral support portion that supports a portion around a portion of the finger to be inspected that is in contact with the probe. A weight obtained by adding the weight of the holding unit to the total weight is a predetermined weight.

請求項4に係る発明は、請求項1、2又は3に記載の振動感覚測定装置の加振ユニットにおいて、前記加振部はネオジウム磁石を有する磁気回路を備えた動電型加振器である。   According to a fourth aspect of the present invention, in the vibration unit of the vibration sensation measuring device according to the first, second, or third aspect, the vibration exciter is an electrodynamic exciter provided with a magnetic circuit having a neodymium magnet. .

請求項5に係る発明は、請求項1、2、3又は4に記載の振動感覚測定装置の加振ユニットにおいて、前記下面弾性体は樹脂製弾性体であり、前記側面弾性体は金属ばねである。   According to a fifth aspect of the present invention, in the vibration unit of the vibration sensation measuring device according to the first, second, third, or fourth aspect, the bottom elastic body is a resin elastic body, and the side elastic body is a metal spring. is there.

請求項1に係る発明によれば、加振部が下面弾性体と側面弾性体を介して筐体に支持されることにより、筐体の振動が低減され、検査している指以外の指が筐体に触れることによる誤判断がなくなる。また、筐体が振動することによる音の発生も低減されるので、音による誤判断がなくなる。更に、振動レベルの測定に影響しない程度に横振動を減少させることができると共に、振動センサ・荷重センサ・センサ取付部の総重量を所定重量にすることで、被験者の指がプローブを押圧することによる測定への影響を低減できる。これらにより、測定精度を維持しつつ軽量で小型化が可能になる。 According to the first aspect of the present invention, the vibration portion is supported by the casing via the bottom elastic body and the side elastic body, so that the vibration of the casing is reduced, and fingers other than the finger being inspected can be detected. No misjudgment by touching the case. Moreover, since the generation of sound due to the vibration of the housing is reduced, erroneous determination by sound is eliminated. Furthermore, the lateral vibration can be reduced to the extent that it does not affect the measurement of the vibration level, and the subject's finger presses the probe by setting the total weight of the vibration sensor / load sensor / sensor mounting part to a predetermined weight. Can reduce the effect on measurement. As a result, it is possible to reduce the size and weight while maintaining the measurement accuracy.

請求項2に係る発明によれば、検査する指のうちプローブに接する部分の周囲の部分を支持する周辺支持部を設けることにより、安定した測定を行うことができる。   According to the invention which concerns on Claim 2, the stable measurement can be performed by providing the periphery support part which supports the peripheral part of the part which touches the probe among the fingers to test | inspect.

請求項3に係る発明によれば、検査する指のうちプローブに接する部分の周囲の部分を支持する周辺支持部を設けることにより、安定した測定を行うことができる。また、振動センサ・荷重センサ・保持ユニット・センサ取付部の総重量を所定重量にすることで、被験者の指がプローブを押圧することによる測定への影響を低減できる。これらにより、測定精度を維持しつつ軽量で小型化が可能になる。   According to the third aspect of the invention, stable measurement can be performed by providing the peripheral support portion that supports the portion around the portion of the finger to be inspected that contacts the probe. Further, by setting the total weight of the vibration sensor, load sensor, holding unit, and sensor mounting portion to a predetermined weight, it is possible to reduce the influence on measurement due to the subject's finger pressing the probe. As a result, it is possible to reduce the size and weight while maintaining the measurement accuracy.

請求項4に係る発明によれば、加振部がネオジウム磁石を有する磁気回路を備えた動電型加振器で構成されるので、加振部のさらなる小型・軽量化を図ることができる。   According to the invention which concerns on Claim 4, since the vibration part is comprised with the electrodynamic type vibrator provided with the magnetic circuit which has a neodymium magnet, the further size reduction and weight reduction of a vibration part can be achieved.

請求項5に係る発明によれば、樹脂製弾性体と金属ばねにより、筐体に伝わる加振部による振動を有効に低減することができる。   According to the invention which concerns on Claim 5, the vibration by the vibration part transmitted to a housing | casing can be effectively reduced with a resin-made elastic body and a metal spring.

以下に本発明の実施の形態を添付図面に基づいて説明する。ここで、図1は振動感覚測定装置の使用状態を示す説明図、図2は本発明に係る振動感覚測定装置の加振ユニットの第1実施の形態の構成図、図3は同じく使用状態説明図、図4は本発明に係る振動感覚測定装置の加振ユニットの第2実施の形態の要部構成図、図5は同じく第3実施の形態の要部構成図、図6は第2及び第3実施の形態の使用状態説明図、図7は加振部の構成図である。   Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is an explanatory view showing the usage state of the vibration sensation measuring apparatus, FIG. 2 is a block diagram of the first embodiment of the vibration unit of the vibration sensation measuring apparatus according to the present invention, and FIG. FIGS. 4A and 4B are main part configuration diagrams of the second embodiment of the vibration unit of the vibration sensation measuring apparatus according to the present invention, FIG. 5 is a main part configuration diagram of the third embodiment, and FIG. FIG. 7 is a diagram illustrating the configuration of the excitation unit.

振動感覚測定装置は、図1に示すように、操作部・表示部・駆動回路や記憶部などを有する装置本体1と、測定時に被験者の前腕を支持するための支持台2と、検査対象となる指に所定の振動を与える加振ユニット3からなる。装置本体1と支持台2と加振ユニット3は、互いに振動や熱などの影響を受けることがないよう個別に構成され、装置本体1と加振ユニット3はケーブル4で電気的に接続されている。図1では本発明の第1実施の形態である加振ユニット3を示している。なお、設置や取り扱いに問題なければ、互いに振動や熱などの影響がほとんどない支持台2と加振ユニット3を一体とし、装置本体1と分離した構成にすることもできる。   As shown in FIG. 1, the vibration sensation measuring device includes a device main body 1 having an operation unit, a display unit, a drive circuit, a storage unit, and the like, a support base 2 for supporting a subject's forearm during measurement, The vibration unit 3 applies a predetermined vibration to the finger. The apparatus main body 1, the support base 2, and the vibration unit 3 are individually configured so as not to be affected by vibration or heat, and the apparatus main body 1 and the vibration unit 3 are electrically connected by a cable 4. Yes. FIG. 1 shows a vibration unit 3 according to the first embodiment of the present invention. If there is no problem in installation and handling, the support base 2 and the vibration unit 3 that are hardly affected by vibration and heat can be integrated and separated from the apparatus main body 1.

本発明の第1実施の形態である加振ユニット3は、図2に示すように、加振方向に突出する振動子5を有する加振部6と、振動子5にセンサ取付部7を介して取り付けられる略円柱形状のプローブ8と、加振部6を下面弾性体9と側面弾性体10を介して支持する筐体11などからなる。センサ取付部7には、振動センサ12とプローブ8を取り付ける荷重センサ13が収納されている。なお、15は加振部6と下面弾性体9を接続するためのベース部材である。ベース部材15は必須の部材ではなく、加振部6に下面弾性体9を直接取り付けてもよい。   As shown in FIG. 2, the vibration unit 3 according to the first embodiment of the present invention includes a vibration unit 6 having a vibrator 5 protruding in a vibration direction, and a sensor attachment part 7 on the vibrator 5. And a case 11 that supports the excitation unit 6 via a lower elastic body 9 and a side elastic body 10. The sensor mounting portion 7 houses a load sensor 13 for mounting the vibration sensor 12 and the probe 8. Reference numeral 15 denotes a base member for connecting the excitation unit 6 and the bottom elastic body 9. The base member 15 is not an essential member, and the lower elastic body 9 may be directly attached to the vibration unit 6.

また、図3に示すように、検査する指がプローブ8にのみ接するようプローブ8が筐体11の上面11aに形成された開口部11bから突出すると共に、プローブ8の先端面8aと筐体11の上面11aとの加振方向の距離が所定範囲を保つように、加振部6が筐体11内に配置されている。開口部11bはプローブ8が筐体11と接触せずに挿通するように形成されている。筐体11は加振部6の振動による影響や製造コストなどを考慮して金属製とするが、プラスチック製でもよい。   As shown in FIG. 3, the probe 8 protrudes from an opening 11 b formed in the upper surface 11 a of the housing 11 so that the finger to be inspected is in contact with only the probe 8, and the distal end surface 8 a of the probe 8 and the housing 11 are The excitation unit 6 is disposed in the housing 11 so that the distance in the excitation direction with respect to the upper surface 11a is maintained within a predetermined range. The opening 11b is formed so that the probe 8 can be inserted without contacting the housing 11. The casing 11 is made of metal in consideration of the influence of the vibration of the excitation unit 6 and the manufacturing cost, but may be made of plastic.

本発明の第2実施の形態である加振ユニット23は、図4に示すように、プローブ8の周囲に略ドーナツ形状の保持ユニット24をプローブ8と接触しないように筐体11に取り付けている。その他の構成は、第1実施の形態である加振ユニット3と同様である。保持ユニット24には、検査する指のうちプローブ8に接する部分の周囲の部分を支持する可動な周辺支持部24aが設けられている。   As shown in FIG. 4, the vibration unit 23 according to the second embodiment of the present invention is attached to the housing 11 so that a substantially donut-shaped holding unit 24 does not contact the probe 8 around the probe 8. . Other configurations are the same as those of the vibration unit 3 according to the first embodiment. The holding unit 24 is provided with a movable peripheral support portion 24a that supports a portion around a portion of the finger to be inspected that is in contact with the probe 8.

保持ユニット24には、周辺支持部24aと底部24bに挟持された支持弾性体25が収納されている。支持弾性体25は金属ばねや樹脂製弾性体などからなる。検査する指のうちプローブ8に接する部分が所定の押圧のとき、指の周囲の部分が周辺支持部24aに当接し、支持弾性体25の弾発力により、許容範囲の圧力が指の周囲の部分に掛かることになる。また、支持弾性体25に替えて荷重センサを保持ユニット24に収納し、周辺支持部24aに対する指の押圧力を、プローブ8に対する押圧力と共に測定することもできる。   The holding unit 24 houses a support elastic body 25 sandwiched between the peripheral support portion 24a and the bottom portion 24b. The support elastic body 25 is made of a metal spring, a resin elastic body, or the like. When the portion of the finger to be inspected that is in contact with the probe 8 is at a predetermined pressure, the portion around the finger comes into contact with the peripheral support portion 24a, and the elastic force of the support elastic body 25 causes an allowable range of pressure to be applied around the finger. It will hang on the part. Further, the load sensor can be housed in the holding unit 24 instead of the support elastic body 25, and the pressing force of the finger on the peripheral support portion 24a can be measured together with the pressing force on the probe 8.

本発明の第3実施の形態である加振ユニット33は、図5に示すように、保持ユニット34をプローブ8や筐体11と接触しないようにセンサ取付部7に取り付けている。その他の構成は、第1実施の形態である加振ユニット3と同様である。保持ユニット34には、検査する指のうちプローブ8に接する部分の周囲の部分を支持する可動な周辺支持部34aが設けられている。   As shown in FIG. 5, the vibration unit 33 according to the third embodiment of the present invention attaches the holding unit 34 to the sensor attachment portion 7 so as not to contact the probe 8 and the housing 11. Other configurations are the same as those of the vibration unit 3 according to the first embodiment. The holding unit 34 is provided with a movable peripheral support portion 34a that supports a portion around a portion in contact with the probe 8 of the finger to be inspected.

保持ユニット34には、周辺支持部34aと底部34bに挟持された支持弾性体35が収納されている。支持弾性体35は金属ばねや樹脂製弾性体などからなる。検査する指のうちプローブ8に接する部分が所定の押圧のとき、指の周囲の部分が周辺支持部34aに当接し、支持弾性体35の弾発力により、許容範囲の圧力が指の周囲の部分に掛かることになる。また、支持弾性体35に替えて荷重センサを保持ユニット34に収納し、周辺支持部34aに対する指の押圧力を、プローブ8に対する押圧力と共に測定することもできる。   The holding unit 34 houses a support elastic body 35 sandwiched between the peripheral support portion 34a and the bottom portion 34b. The support elastic body 35 is made of a metal spring, a resin elastic body, or the like. When the part of the finger to be inspected that is in contact with the probe 8 is pressed at a predetermined pressure, the part around the finger comes into contact with the peripheral support portion 34a, and the elastic force of the support elastic body 35 causes an allowable range of pressure to be applied around the finger. It will hang on the part. Further, the load sensor can be housed in the holding unit 34 instead of the support elastic body 35, and the pressing force of the finger on the peripheral support portion 34a can be measured together with the pressing force on the probe 8.

加振部6は、図7に示すように、動電型であり、ケース16に収納された駆動部は磁気回路17と、振動子5と一体に動くように構成されたコイル18からなる。磁気回路17は飽和磁束密度の高い軟磁性部材19と永久磁石20からなり、所定磁場の領域を形成する。小型化を図るためには、永久磁石20は磁気特性として高保持力で高残留磁束密度であり、最大エネルギー積の大きいネオジウム磁石やサマリウムコバルト磁石などの希土類磁石を使用するが、特にネオジウム磁石が望ましい。   As shown in FIG. 7, the vibration unit 6 is of an electrodynamic type, and the drive unit housed in the case 16 includes a magnetic circuit 17 and a coil 18 configured to move integrally with the vibrator 5. The magnetic circuit 17 includes a soft magnetic member 19 having a high saturation magnetic flux density and a permanent magnet 20, and forms a predetermined magnetic field region. In order to reduce the size, the permanent magnet 20 uses a rare earth magnet such as a neodymium magnet or a samarium cobalt magnet having a large maximum energy product and a high coercive force and a high residual magnetic flux as magnetic characteristics. desirable.

振動子5と一体に動くように構成されたコイル18は、所定磁場の領域に配置され、コイル18に電流を流すことにより、矢印Bで示す上下方向に振動することになる。振動子5には、横振動を防止する支持部21が設けられている。ここで、振動子5・磁気回路17・コイル18・支持部21は、振動軸のセンタに対して軸対称の形状である。また、本発明の実施の形態では加振部6の外形と筐体11は、略直方体形状であるが、磁気回路17などと同じく振動軸のセンタに対して軸対称となる略円柱形状でもよい。なお、加振部6は電磁型で構成することもできる。   The coil 18 configured to move integrally with the vibrator 5 is disposed in a predetermined magnetic field region, and vibrates in the vertical direction indicated by the arrow B when a current is passed through the coil 18. The vibrator 5 is provided with a support portion 21 that prevents lateral vibration. Here, the vibrator 5, the magnetic circuit 17, the coil 18, and the support portion 21 have an axisymmetric shape with respect to the center of the vibration axis. Further, in the embodiment of the present invention, the outer shape of the excitation unit 6 and the casing 11 have a substantially rectangular parallelepiped shape, but may have a substantially cylindrical shape that is axially symmetric with respect to the center of the vibration axis like the magnetic circuit 17 or the like. . In addition, the vibration part 6 can also be comprised with an electromagnetic type.

下面弾性体9と側面弾性体10は金属ばねや樹脂製弾性体などの弾性体を用いる。ここで、下面弾性体9は樹脂製弾性体であるシリコンなどの防振ゲルを使用し、図2に示すように、加振部6の振動が筐体11に伝わらないように筐体11の下面11cに4個配置されている。下面弾性体9は4個に限定されるものではなく、シート状に形成した下面弾性体9を1枚配置してもよい。   The bottom elastic body 9 and the side elastic body 10 use an elastic body such as a metal spring or a resin elastic body. Here, the bottom elastic body 9 uses a vibration-proof gel such as silicon, which is a resin elastic body, and the vibration of the vibration excitation unit 6 is not transmitted to the case 11 as shown in FIG. Four pieces are arranged on the lower surface 11c. The number of the bottom elastic bodies 9 is not limited to four, and one bottom elastic body 9 formed in a sheet shape may be arranged.

ここで、側面弾性体10は金属ばねを使用し、加振部6の横振動を低減すると共に、この横振動が筐体11に伝わらないように筐体11の側面11dに合計8個(加振部6が略直方体形状で各側面(4面)に2個設けると、2×4=8個)配置されている。但し、8個に限定されるものではない。なお、加振部6が略円柱形状であれば筐体の側面11dに合計4個としてもよい。   Here, the side elastic body 10 uses a metal spring to reduce the lateral vibration of the excitation unit 6, and a total of eight pieces (applied to the side surface 11 d of the casing 11 so that the lateral vibration is not transmitted to the casing 11. If two vibrating parts 6 are formed in a substantially rectangular parallelepiped shape and provided on each side surface (four surfaces), 2 × 4 = 8 are arranged. However, the number is not limited to eight. In addition, if the excitation part 6 is substantially cylindrical shape, it is good also as a total of four on the side surface 11d of a housing | casing.

振動センサ12と荷重センサ13を収納したセンサ取付部7は、加振部6が加振状態のときに、被験者の指がプローブ8を押圧することによる測定への影響を、要求される振動レベルの測定精度を維持することができる程度に低減する役割を果たす。振動センサ12と荷重センサ13は、検査対象となる指の近くに配置するのが望ましく、荷重センサ13はセンサ取付部7の上側で、振動センサ12はセンサ取付部7の下側に収納される。   The sensor mounting portion 7 that houses the vibration sensor 12 and the load sensor 13 has a vibration level required to influence the measurement by the subject's finger pressing the probe 8 when the vibration portion 6 is in a vibration state. It plays the role of reducing to such an extent that the measurement accuracy can be maintained. The vibration sensor 12 and the load sensor 13 are preferably arranged near the finger to be inspected. The load sensor 13 is stored above the sensor mounting portion 7 and the vibration sensor 12 is stored below the sensor mounting portion 7. .

保持ユニット24,34を取り付ける加振ユニット23,33の場合には、周辺支持部24a,34aの大きさは、図4及び図5に示すように、検査に影響しないよう略円柱形状のプローブ8の周囲全体を囲み、被験者の指先が筐体11に触れない程度とする。   In the case of the vibration units 23 and 33 to which the holding units 24 and 34 are attached, as shown in FIGS. 4 and 5, the size of the peripheral support portions 24 a and 34 a is a substantially cylindrical probe 8 so as not to affect the inspection. And the test subject's fingertips do not touch the casing 11.

加振部6、振動センサ12、荷重センサ13から加振ユニット3,23の外部への配線(不図示)は、筐体11に影響を与えることなく施されている。また、筐体11の外側下面11eに脚部(不図示)を設けてもよい。部屋の床などから筐体11に振動が伝わる測定環境の場合には、脚部を設けるのが望ましい。   Wiring (not shown) from the vibration unit 6, the vibration sensor 12, and the load sensor 13 to the outside of the vibration units 3 and 23 is provided without affecting the housing 11. Further, a leg portion (not shown) may be provided on the outer lower surface 11 e of the housing 11. In a measurement environment where vibration is transmitted from the floor of the room to the housing 11, it is desirable to provide legs.

以上のように構成された本発明に係る振動感覚測定装置の加振ユニット3,23,33の作用・効果について説明する。
第1実施の形態である加振ユニット3の場合、図1に示すように、被験者が前腕を支持台2に載せ、支持台2と離れて置かれた加振ユニット3の開口部11bから突出するプローブ8の先端面8aに検査対象となる指を当てる。また、検査対象以外の指は筐体11の上面11aに載置される。
The operation and effect of the vibration units 3, 23, and 33 of the vibration sensation measuring apparatus according to the present invention configured as described above will be described.
In the case of the vibration unit 3 according to the first embodiment, as shown in FIG. 1, the subject puts his forearm on the support base 2 and protrudes from the opening 11 b of the vibration unit 3 placed away from the support base 2. A finger to be inspected is applied to the distal end surface 8a of the probe 8 to be inspected. In addition, fingers other than the inspection target are placed on the upper surface 11 a of the housing 11.

この時、図2に示すように、プローブ8の先端面8a(プローブ8の振動振幅のセンタ位置)と筐体11の上面11aとの矢印Aで示す上下方向の距離が所定範囲を保つように加振部6を筐体11内に配置している。なお、プローブ8の先端面8aと筐体11の上面11aとの加振方向の距離は、図3に示すように、被験者が指でプローブ8を押圧すると、指の柔らかさのために凹むことを考慮して決める。また、指がプローブ8の先端面8aを押圧する力は所定範囲内と定めている。   At this time, as shown in FIG. 2, the vertical distance indicated by the arrow A between the distal end surface 8a of the probe 8 (center position of the vibration amplitude of the probe 8) and the upper surface 11a of the housing 11 is maintained within a predetermined range. The vibration unit 6 is disposed in the housing 11. As shown in FIG. 3, the distance in the vibration direction between the distal end surface 8 a of the probe 8 and the upper surface 11 a of the housing 11 is recessed due to the softness of the finger when the subject presses the probe 8 with the finger. Determine in consideration of The force with which the finger presses the distal end surface 8a of the probe 8 is determined to be within a predetermined range.

第2実施の形態である加振ユニット23の場合も、被験者が前腕を支持台2に載せ、支持台2と離れて置かれた加振ユニット23の開口部11bから突出するプローブ8の先端面8aに検査対象となる指を当てる。また、検査対象以外の指は筐体11の上面11aに載置される。プローブ8の先端面8aと保持ユニット24の周辺支持部24aとの加振方向の距離は、図6に示すように、被験者が指でプローブ8を押圧すると、指の柔らかさのために所定の範囲で凹むことを考慮して決める。また、指がプローブ8の先端面8aを押圧する力は所定範囲内と定めている。   Also in the case of the vibration unit 23 according to the second embodiment, the subject puts the forearm on the support base 2 and the distal end surface of the probe 8 protrudes from the opening 11b of the vibration unit 23 placed away from the support base 2. A finger to be inspected is applied to 8a. In addition, fingers other than the inspection target are placed on the upper surface 11 a of the housing 11. As shown in FIG. 6, when the subject presses the probe 8 with a finger, the distance between the distal end surface 8a of the probe 8 and the peripheral support portion 24a of the holding unit 24 is a predetermined distance due to the softness of the finger. Decide in consideration of dents in the range. The force with which the finger presses the distal end surface 8a of the probe 8 is determined to be within a predetermined range.

プローブ8の先端面8aに検査対象となる指を当てると、図6に示すように、検査する指のうちプローブ8に接する部分の周囲の部分が周辺支持部24aに当接する。すると、支持弾性体25の弾発力により、許容範囲の圧力が指の周囲の部分に掛かることになる。また、第3実施の形態である加振ユニット23の作用・効果も、第2実施の形態である加振ユニット23の場合と同様である。   When a finger to be inspected is applied to the distal end surface 8a of the probe 8, as shown in FIG. 6, the peripheral portion of the finger to be inspected that is in contact with the probe 8 comes into contact with the peripheral support portion 24a. Then, due to the elastic force of the support elastic body 25, a pressure within an allowable range is applied to a portion around the finger. The action and effect of the vibration unit 23 according to the third embodiment are the same as those of the vibration unit 23 according to the second embodiment.

次いで、加振部6を駆動すると、周波数が数Hzから百数十Hzの間で振動することになり、プローブ8の最大振動振幅は数Hzで約1mmとなる。振動子5に取り付けられたセンサ取付部7などを含め振動することにより、この反作用で加振部6全体が振動する。これが筐体11の主な振動源となる。そして、加振部6の振動による筐体11の振動は、加振部6と筐体11の下面11cとの間に配設された下面弾性体9により低減される。   Next, when the excitation unit 6 is driven, the frequency vibrates between several Hz to several hundreds of Hz, and the maximum vibration amplitude of the probe 8 is about 1 mm at several Hz. By vibrating including the sensor attachment portion 7 attached to the vibrator 5, the entire vibration portion 6 vibrates due to this reaction. This is the main vibration source of the housing 11. And the vibration of the housing | casing 11 by the vibration of the vibration excitation part 6 is reduced by the lower surface elastic body 9 arrange | positioned between the vibration excitation part 6 and the lower surface 11c of the housing | casing 11. FIG.

周波数が数Hzから百数十Hzの間で筐体11の振動を低減するためには、柔軟性がある弾性体を使用する必要がある。例えば、加振部6の重量が約1.6kgの場合には、バネ定数が約6.2×10−3N/mの下面弾性体9を4個使用する。なお、下面弾性体9のバネ定数は加振部6の重量などにより選定する。 In order to reduce the vibration of the casing 11 when the frequency is between several Hz and hundreds of tens Hz, it is necessary to use a flexible elastic body. For example, when the weight of the vibration unit 6 is about 1.6 kg, four lower elastic bodies 9 having a spring constant of about 6.2 × 10 −3 N / m are used. Note that the spring constant of the bottom elastic body 9 is selected based on the weight of the vibrating portion 6 and the like.

加振部6と筐体11の下面11cとの間に配設した下面弾性体9により、筐体11の振動が低減されるが、更に振動子5の振動が加振部6全体の横振動を招来することがある。加振部6全体の横振動は振動子5からセンサ取付部7を介して取り付けられているプローブ8の横振動となり、周波数によっては加振条件を満足しないこともある。加振部6全体の横振動は、加振部6と筐体11の側面11dとの間に配設された側面弾性体10により低減される。   The lower elastic body 9 disposed between the vibration unit 6 and the lower surface 11 c of the housing 11 reduces the vibration of the housing 11, but the vibration of the vibrator 5 further causes the lateral vibration of the entire vibration unit 6. May be invited. The lateral vibration of the entire excitation unit 6 becomes the lateral vibration of the probe 8 attached from the vibrator 5 via the sensor attachment part 7, and the excitation condition may not be satisfied depending on the frequency. Lateral vibration of the entire vibration unit 6 is reduced by the side elastic body 10 disposed between the vibration unit 6 and the side surface 11 d of the housing 11.

例えば、加振部6の重量が約1.6kgの場合には、バネ定数が約0.4×10−3N/mの側面弾性体10を、各側面(4面)に夫々2個設けると、2×4=8個使用することになる。なお、側面弾性体10のバネ定数は加振部6の重量や下面弾性体9のバネ定数・設値条件などにより選定する。これらの条件のもとで、筐体11の振動が振動レベルの測定に影響しない程度に低減される。 For example, when the weight of the vibrating portion 6 is about 1.6 kg, two side elastic bodies 10 having a spring constant of about 0.4 × 10 −3 N / m are provided on each side surface (four surfaces). 2 × 4 = 8 pieces are used. Note that the spring constant of the side elastic body 10 is selected according to the weight of the excitation unit 6, the spring constant of the bottom elastic body 9, and setting conditions. Under these conditions, the vibration of the housing 11 is reduced to such an extent that the measurement of the vibration level is not affected.

検査中、プローブ8の振動が振動センサ12により測定され、指のプローブ8に対する押圧力が荷重センサ13により測定される。これらの測定データは装置本体1に送られ、記憶部に記憶される。これらのセンサ12,13を収納し、振動子5の上部に設けたセンサ取付部7は、加振部6が加振状態のときに、被験者の指がプローブ8を押圧することによる測定への影響を、要求される振動レベルの測定精度を維持することができる程度に低減する。   During the inspection, the vibration of the probe 8 is measured by the vibration sensor 12, and the pressing force of the finger against the probe 8 is measured by the load sensor 13. These measurement data are sent to the apparatus body 1 and stored in the storage unit. The sensor mounting portion 7 that houses these sensors 12 and 13 and is provided on the top of the vibrator 5 can be used for measurement when the subject's finger presses the probe 8 when the vibration portion 6 is in a vibration state. The influence is reduced to such an extent that the required measurement accuracy of the vibration level can be maintained.

この測定精度を維持するために、第1実施の形態である加振ユニット3の場合と保持ユニット24を筐体11に取り付けた第2実施の形態である加振ユニット23の場合には、振動センサ12・荷重センサ13・センサ取付部7の総重量が、所定重量(例えば、約120g)になるようにセンサ取付部7の重量を調節する。   In order to maintain this measurement accuracy, the vibration unit 3 according to the first embodiment and the vibration unit 23 according to the second embodiment in which the holding unit 24 is attached to the housing 11 The weight of the sensor mounting portion 7 is adjusted so that the total weight of the sensor 12, the load sensor 13, and the sensor mounting portion 7 becomes a predetermined weight (for example, about 120 g).

また、保持ユニット34をセンサ取付部7に取り付けた第3実施の形態である加振ユニット33の場合には、振動センサ12・荷重センサ13・保持ユニット34・センサ取付部7の総重量が、所定重量になるようにセンサ取付部7の重量を調節する。   Further, in the case of the vibration unit 33 according to the third embodiment in which the holding unit 34 is attached to the sensor attachment portion 7, the total weight of the vibration sensor 12, the load sensor 13, the holding unit 34, and the sensor attachment portion 7 is The weight of the sensor mounting portion 7 is adjusted so as to be a predetermined weight.

ここで、加振部6は所定重量に対して十分な加振性能を有したものであり、加振部6の重量や外形状により、下面弾性体9・側面弾性体10のバネ定数等や筐体11の肉厚・外形寸法等を決定するが、一通りではなく様々であり、本発明の実施の形態に限定されるものではない。   Here, the vibration unit 6 has sufficient vibration performance with respect to a predetermined weight. Depending on the weight and the outer shape of the vibration unit 6, the spring constants of the lower surface elastic body 9 and the side surface elastic body 10, etc. The thickness, outer dimensions, and the like of the housing 11 are determined, but are not limited to various ones, and are not limited to the embodiments of the present invention.

本発明によれば、振動レベルの測定に影響しない程度に筐体の振動を減少させると共に、測定精度を維持しつつ軽量で小型化が可能な振動感覚測定装置の加振ユニットを提供することができる。   According to the present invention, it is possible to provide a vibration unit of a vibration sensation measurement device that can reduce the vibration of the housing to the extent that it does not affect the measurement of the vibration level, and can be reduced in size and weight while maintaining measurement accuracy. it can.

振動感覚測定装置の使用状態を示す説明図Explanatory drawing showing the usage state of the vibration sensation measuring device 本発明に係る振動感覚測定装置の加振ユニットの第1実施の形態の構成図The block diagram of 1st Embodiment of the vibration unit of the vibration sense measuring apparatus which concerns on this invention 本発明に係る振動感覚測定装置の加振ユニットの第1実施の形態の使用状態説明図Explanatory drawing of the first embodiment of the vibration unit of the vibration sensation measuring apparatus according to the present invention 本発明に係る振動感覚測定装置の加振ユニットの第2実施の形態の要部構成図The principal part block diagram of 2nd Embodiment of the vibration unit of the vibration sense measuring apparatus which concerns on this invention 本発明に係る振動感覚測定装置の加振ユニットの第3実施の形態の要部構成図The principal part block diagram of 3rd Embodiment of the vibration unit of the vibration sense measuring apparatus which concerns on this invention 本発明に係る振動感覚測定装置の加振ユニットの第2及び第3実施の形態の使用状態説明図Explanatory drawing of the second and third embodiments of the vibration unit of the vibration sensation measuring apparatus according to the present invention 加振部の構成図Configuration diagram of excitation unit

符号の説明Explanation of symbols

1…装置本体、2…支持台、3,23,33…加振ユニット、5…振動子、6…加振部、7…センサ取付部、8…プローブ、8a…先端面、9…下面弾性体、10…側面弾性体、11…筐体、11a…上面、11b…開口部、11c…下面、11d…側面、12…振動センサ、13…荷重センサ、24,34…保持ユニット、24a,34a…周辺支持部、25…支持弾性体。   DESCRIPTION OF SYMBOLS 1 ... Apparatus main body, 2 ... Support stand, 3, 23, 33 ... Excitation unit, 5 ... Vibrator, 6 ... Excitation part, 7 ... Sensor mounting part, 8 ... Probe, 8a ... Tip surface, 9 ... Lower surface elasticity Body, 10 ... elastic body, 11 ... casing, 11a ... upper surface, 11b ... opening, 11c ... lower surface, 11d ... side surface, 12 ... vibration sensor, 13 ... load sensor, 24, 34 ... holding unit, 24a, 34a ... peripheral support part, 25 ... support elastic body.

Claims (5)

装置本体及び前腕の支持台と共に振動感覚測定装置を構成する加振ユニットであって、前記加振ユニットは前記装置本体から分離され、加振方向に突出する振動子を有する加振部と、この加振部の振動子に取り付けるセンサ取付部と、このセンサ取付部に取り付ける振動センサ及び荷重センサと、この荷重センサに取り付けるプローブと、前記加振部を下面弾性体と側面弾性体を介して支持する筐体からなり、前記振動センサ・前記荷重センサ・前記センサ取付部の総重量が所定重量であり、前記プローブが前記筐体の上面の開口部から突出すると共に、前記プローブの先端面と前記筐体の上面との加振方向の距離が所定範囲を保つように前記加振部を前記筐体内に配置したことを特徴とする振動感覚測定装置の加振ユニット。 A vibration unit that constitutes a vibration sensation measurement device together with a support base of the device main body and the forearm, wherein the vibration unit is separated from the device main body and has a vibrator protruding in the vibration direction, A sensor mounting portion to be attached to the vibrator of the vibration excitation portion, a vibration sensor and a load sensor to be attached to the sensor attachment portion, a probe to be attached to the load sensor, and the vibration excitation portion are supported via a bottom elastic body and a side elastic body. A total weight of the vibration sensor, the load sensor, and the sensor mounting portion is a predetermined weight, the probe protrudes from an opening on the upper surface of the housing, and the tip surface of the probe and the An excitation unit of a vibration sensation measuring apparatus, wherein the excitation unit is arranged in the casing so that a distance in an excitation direction with respect to an upper surface of the casing is maintained within a predetermined range. 請求項1に記載の振動感覚測定装置の加振ユニットにおいて、検査する指のうち前記プローブに接する部分の周囲の部分を支持する周辺支持部を備えた保持ユニットを前記筐体に取り付けたことを特徴とする振動感覚測定装置の加振ユニット。 The vibration unit of the vibration sensation measuring device according to claim 1, wherein a holding unit including a peripheral support portion that supports a peripheral portion of a finger to be inspected that is in contact with the probe is attached to the housing. The vibration unit of the vibration sensation measuring device. 請求項1に記載の振動感覚測定装置の加振ユニットにおいて、検査する指のうち前記プローブに接する部分の周囲の部分を支持する周辺支持部を備えた保持ユニットを前記センサ取付部に取り付け、前記総重量に前記保持ユニットの重量を加えた重量が所定重量であることを特徴とする振動感覚測定装置の加振ユニット。 The vibration unit of the vibration sensation measuring device according to claim 1, wherein a holding unit including a peripheral support part that supports a peripheral part of a part in contact with the probe among fingers to be inspected is attached to the sensor attachment part, A vibration unit of a vibration sensation measuring apparatus, wherein a weight obtained by adding a weight of the holding unit to a total weight is a predetermined weight. 請求項1、2又は3に記載の振動感覚測定装置の加振ユニットにおいて、前記加振部はネオジウム磁石を有する磁気回路を備えた動電型加振器であることを特徴とする振動感覚測定装置の加振ユニット。 The vibration unit of the vibration sensation measuring apparatus according to claim 1, 2, or 3, wherein the vibration unit is an electrodynamic exciter including a magnetic circuit having a neodymium magnet. Excitation unit of the device. 請求項1、2、3又は4に記載の振動感覚測定装置の加振ユニットにおいて、前記下面弾性体は樹脂製弾性体であり、前記側面弾性体は金属ばねであることを特徴とする振動感覚測定装置の加振ユニット。 5. The vibration unit of the vibration sensation measuring apparatus according to claim 1, wherein the lower elastic body is a resin elastic body, and the side elastic body is a metal spring. Excitation unit of measuring device.
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