JPH0156684B2 - - Google Patents
Info
- Publication number
- JPH0156684B2 JPH0156684B2 JP54002751A JP275179A JPH0156684B2 JP H0156684 B2 JPH0156684 B2 JP H0156684B2 JP 54002751 A JP54002751 A JP 54002751A JP 275179 A JP275179 A JP 275179A JP H0156684 B2 JPH0156684 B2 JP H0156684B2
- Authority
- JP
- Japan
- Prior art keywords
- joint
- angle
- swinging rod
- plate
- mounting plates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000007246 mechanism Effects 0.000 claims description 7
- 210000000629 knee joint Anatomy 0.000 description 7
- 238000001514 detection method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000005021 gait Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
Landscapes
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Description
【発明の詳細な説明】
本発明は、人体等の運動の解析に用いる関節角
度計に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a joint angle meter used for analyzing motion of a human body, etc.
従来、関節の回転中心に角度検出器を取付けて
関節の一方向への回転の角度を測定するようにし
たものは知られているが、この種の関節角度計で
は二以上の方向の回転角度を独立に測定すること
は困難である。 Conventionally, it is known that an angle detector is attached to the rotation center of a joint to measure the rotation angle in one direction of the joint, but this type of joint angle meter measures the rotation angle in two or more directions. is difficult to measure independently.
本発明は、簡単な構成の関節角度計により、関
節の屈伸方向の回転角度ばかりでなく、回内回外
方向への回転角度をも独立に検出可能とし、しか
も関節近傍に固定するだけで関節の運動に殆んど
影響を与えることなく使用できるように構成した
ことをその特徴とするものである。 The present invention makes it possible to independently detect not only the rotation angle in the flexion/extension direction of the joint, but also the rotation angle in the pronation/supination direction using a joint angle meter with a simple configuration. It is characterized by being constructed so that it can be used with almost no effect on the movement of the body.
以下、本発明の実施例を図面に基づいて詳細に
説明するに、第１図及び第２図において、１及び
２は関節を挾んで適所に固定すべき一対の取付板
で、これらは人体等への固定を容易にするために
可撓性を有する薄板によつて形成している。 Hereinafter, embodiments of the present invention will be described in detail based on the drawings. In FIGS. 1 and 2, reference numerals 1 and 2 are a pair of mounting plates that are to sandwich the joints and fix them in place; It is made of a flexible thin plate to facilitate fixation.
これらの取付板のうちの一方の取付板１には台
板３を固定し、この台板３に対して方形状の側板
によつて形成した枠体４を左右に傾倒調節自在に
付設すべく、枠体４の背側板４ａに一対のスリツ
ト５，５を穿設すると共に、これらのスリツトを
通じて台板３に螺合したねじ６，６により背側板
４ａと台板３とを締着している。 A base plate 3 is fixed to one of the mounting plates 1, and a frame body 4 formed by rectangular side plates is attached to the base plate 3 so as to be tiltable left and right. A pair of slits 5, 5 are bored in the back side plate 4a of the frame 4, and the back side plate 4a and the base plate 3 are fastened by screws 6, 6 screwed into the base plate 3 through these slits. There is.
上記取付板１の枠体４及び取付板２は、そのそ
れぞれに関節機構７，８で揺動自在に取付けた揺
動杆９によつて連結している。関節機構７は、揺
動杆９に固定した球状体１０を枠体４に設けた球
面受座１１に支承させ、また関節機構８は揺動杆
９を摺動自在に挿通した球状体１２を取付板２に
設けた球面受座１３に支承させることにより構成
したものである。 The frame 4 of the mounting plate 1 and the mounting plate 2 are connected to each other by a swinging rod 9 that is swingably attached to each other by joint mechanisms 7 and 8. The joint mechanism 7 has a spherical body 10 fixed to a swinging rod 9 supported by a spherical seat 11 provided on the frame 4, and the joint mechanism 8 has a spherical body 12 slidably inserted through the swinging rod 9. It is constructed by being supported by a spherical seat 13 provided on the mounting plate 2.
取付板１の枠体４に設けた半円形板１４，１５
は、その長さ方向に沿つて揺動杆９の端部が嵌入
するスリツト１６，１７を有するもので、枠体４
に対してこの半円形板１４，１５を互いに直交す
る軸線のまわりに回転自在に支承させることによ
り、上記スリツト１６，１７が関節機構７の上方
において互いに直交するように配設し、両スリツ
ト１６，１７に嵌入した揺動杆９の上端の動きを
検出するため、半円形板１４，１５の各一端の軸
を枠体４に設けた角度検出器１８，１９に連結し
ている。この角度検出器１８，１９は、半円形板
１４，１５の回転角度を電気抵抗の変化に基づく
電圧変化として検出するもので、汎用の可変抵抗
器等を用いることができる。 Semicircular plates 14 and 15 provided on the frame 4 of the mounting plate 1
has slits 16 and 17 along its length into which the ends of the swinging rod 9 fit, and the frame 4
By supporting the semicircular plates 14 and 15 rotatably around axes perpendicular to each other, the slits 16 and 17 are disposed above the joint mechanism 7 so as to be perpendicular to each other, and both slits 16 , 17, the shafts at one end of each of the semicircular plates 14, 15 are connected to angle detectors 18, 19 provided in the frame 4. The angle detectors 18 and 19 detect the rotation angle of the semicircular plates 14 and 15 as voltage changes based on changes in electrical resistance, and can be general-purpose variable resistors or the like.
上記角度検出器１８，１９の検出信号は、第３
図に示すように、枠体４に設けた送信機により無
線送信し、この信号を離隔位置に配設した受信機
で受信して、演算部で必要な演算を行い、関節の
角度変化として出力される。 The detection signals of the angle detectors 18 and 19 are
As shown in the figure, the signal is wirelessly transmitted by a transmitter installed in the frame 4, received by a receiver installed at a remote location, and the necessary calculations are performed by the calculation section, which is output as changes in the angle of the joint. be done.
次に、このように構成した本発明の関節角度計
を歩行解析のための膝関節の角度測定に適用する
場合について説明する。 Next, a case will be described in which the joint angle meter of the present invention configured as described above is applied to measuring the angle of a knee joint for gait analysis.
測定にあたつては、まず、第４図Ａに示すよう
に、一方の取付板１を大腿部に取付けると共に、
他方の取付板２を下腿部に固定する。今、第４図
Ｂに示すように膝関節が屈曲したとすると、その
屈曲回転に応じて揺動杆９が回動し、それに伴つ
て半円形板１４，１５のスリツト１６，１７に嵌
入した揺動杆９の上端が動き、この揺動杆９によ
り半円形板１５のみが回動して、角度検出器１９
によりその回転角度が電気抵抗の変化として検出
される。なお、この場合に膝関節の回転中心と両
取付板１，２の取付位置との間の距離l1、l2が等
しければ、関節の回転角度に対して抵抗値が線形
に対応することになる。 For measurement, first, as shown in FIG. 4A, one mounting plate 1 is attached to the thigh, and
The other mounting plate 2 is fixed to the lower leg. Now, if the knee joint is bent as shown in FIG. The upper end of the swinging rod 9 moves, and only the semicircular plate 15 rotates due to the swinging rod 9, and the angle detector 19
The rotation angle is detected as a change in electrical resistance. In this case, if the distances l 1 and l 2 between the rotation center of the knee joint and the mounting positions of both mounting plates 1 and 2 are equal, the resistance value will linearly correspond to the rotation angle of the joint. Become.
l1及びl2が任意の測定方法は、 θ：直接測定される角度 φ：求めようとする関節角度 sinθ＝l2sin（θ＋φ） φ＝sin（Ａ（θ））−θ、Ａ（θ）＝l1／l2sinθ であり、l1とl2が等しければ、 φ＝π−2θ である。 The measurement method where l 1 and l 2 are arbitrary is: θ: Directly measured angle φ: Joint angle to be determined sinθ=l 2 sin(θ+φ) φ=sin(A(θ))−θ, A(θ )=l 1 /l 2 sinθ, and if l 1 and l 2 are equal, φ=π−2θ.
上述した膝関節の屈曲においては、揺動杆９の
上端が半円形板１５を回転させるが、半円形板１
４に対しては揺動杆９の上端がスリツト１６に沿
つて動くことになるので回転が与えられない。 In bending the knee joint described above, the upper end of the swinging rod 9 rotates the semicircular plate 15;
4, the upper end of the swinging rod 9 moves along the slit 16, so no rotation is applied.
また、膝関節が左右に屈曲、即ち回内または回
外方向に屈曲する場合には、揺動杆９の上端が半
円形板１５のスリツト１７内を摺動しながら半円
形板１４のみを回動させることになる。なお、こ
の場合には取付板１，２の取付位置に拘らず回転
角度に対して角度検出器１８の抵抗値が線形に対
応する。さらに、膝関節が前後及び左右の複合方
向へ屈曲した場合には、揺動杆９の上端が両半円
形板１４，１５のスリツト１６，１７内を摺動し
ながら両半円形板１４，１５を回動させることに
なる。 Further, when the knee joint is bent from side to side, that is, in the pronation or supination direction, the upper end of the swinging rod 9 rotates only the semicircular plate 14 while sliding within the slit 17 of the semicircular plate 15. It will move. In this case, the resistance value of the angle detector 18 linearly corresponds to the rotation angle regardless of the mounting positions of the mounting plates 1 and 2. Further, when the knee joint is bent in a compound direction of forward and backward and left and right, the upper end of the swinging rod 9 slides in the slits 16 and 17 of both semicircular plates 14 and 15, and will be rotated.
而して、これらの膝関節の屈曲において、前後
及び左右方向への回転角度はそれぞれ角度検出器
１８，１９において独立に検出され、この検出信
号は、送信機及び受信機を経て演算部で演算さ
れ、関節の各方向の角度変化として表示される。 During the bending of these knee joints, the rotation angles in the front-back and left-right directions are detected independently by the angle detectors 18 and 19, respectively, and these detection signals are calculated by the calculation unit via the transmitter and receiver. and displayed as angle changes in each direction of the joint.
このように本発明の関節角度計によれば、簡単
な構成によつて関節の屈伸方向の回転角度及び左
右屈曲方向の回転角度を独立に検出することがで
き、しかも歩行などの関節運動に殆んど影響を与
えることなく自然な運動状態で角度の測定を行う
ことができる。 As described above, the joint angle meter of the present invention can independently detect the rotation angle in the flexion/extension direction and the rotation angle in the left/right flexion direction of the joint with a simple configuration. It is possible to measure angles in a natural state of motion without any adverse effects.
第１図は本発明の関節角度計の斜視図、第２図
はその縦断面図、第３図は検出信号を処理するた
めの装置についてのブロツク構成図、第４図Ａ，
Ｂは使用状態を示す説明図である。
１，２……取付板、４……枠体、７，８……関
節機構、９……揺動杆、１４，１５……半円形
板、１６，１７……スリツト、１８，１９……角
度検出器。
FIG. 1 is a perspective view of the joint angle meter of the present invention, FIG. 2 is a vertical sectional view thereof, FIG. 3 is a block diagram of a device for processing detection signals, and FIG.
B is an explanatory diagram showing the state of use. 1, 2... Mounting plate, 4... Frame, 7, 8... Joint mechanism, 9... Swinging rod, 14, 15... Semicircular plate, 16, 17... Slit, 18, 19... Angle detector.
Claims (1)
の取付板のそれぞれに関節機構で揺動自在に取付
けた揺動杆によつて連結し、上記取付板の一方に
取付けた枠体に、揺動杆の端部が嵌入するスリツ
トを設けた半円形板を互いに直交する軸線のまわ
りに回動自在に支承させると共に、その半円形板
の回転角度を電気抵抗の変化として検出する角度
検出器を取付け、他方の取付板における関節機構
には上記揺動杆を摺動自在に挿通したことを特徴
とする運動解析用関節角度計。1. A pair of mounting plates that are to be fixed by sandwiching the joints are connected by a swinging rod that is swingably attached to each of the mounting plates with a joint mechanism, and to a frame attached to one of the mounting plates, An angle detector that supports a semicircular plate provided with a slit into which the end of a swinging rod is fitted so as to be rotatable around mutually orthogonal axes, and detects the rotation angle of the semicircular plate as a change in electrical resistance. A joint angle meter for motion analysis, characterized in that the swing rod is slidably inserted into the joint mechanism of the other mounting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP275179A JPS5595804A (en) | 1979-01-12 | 1979-01-12 | Joint angle gauge for motion analysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP275179A JPS5595804A (en) | 1979-01-12 | 1979-01-12 | Joint angle gauge for motion analysis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5595804A JPS5595804A (en) | 1980-07-21 |
| JPH0156684B2 true JPH0156684B2 (en) | 1989-12-01 |
Family
ID=11538044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP275179A Granted JPS5595804A (en) | 1979-01-12 | 1979-01-12 | Joint angle gauge for motion analysis |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5595804A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5253655A (en) * | 1992-12-17 | 1993-10-19 | Stone Kevin R | Apparatus and method for measuring range of motion of an articulated joint |
| JP3618506B2 (en) * | 1997-02-26 | 2005-02-09 | 株式会社日本メディックス | Angle measuring instrument |
-
1979
- 1979-01-12 JP JP275179A patent/JPS5595804A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5595804A (en) | 1980-07-21 |
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