JP3042069U - Flexible goniometer - Google Patents

Abstract

(57) [Abstract] [Problem] To provide a flexible angle meter having a simple structure and capable of digital display. A pendulum 2 and a code wheel 5 are fixed to a rotary shaft 1 provided in a central portion of a case 10, and an encoder module 6 is provided corresponding to the code wheel 5 and is connected to the encoder module 6 to be connected to a computing device 20. A measurement switch 9 for operating the arithmetic unit 20 is provided outside the case 10, and the position of the pendulum 2 at the first angular position is digitally displayed as 0 ° as a reference value by the operation of the measurement switch 9, and then, A flexible goniometer that digitally displays the position of the pendulum 2 at the second angular position as the displacement angle with respect to the reference value by operating the measurement switch 9.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a flexible goniometer for measuring the bending angle of a joint in the human body, and is mainly used for measuring the range of motion (ROM) of joints in the fields of sports, orthopedics and rehabilitation medicine. It is something that can be done.

[0002]

[Prior art]

 As a conventional technique of a flexible angle meter, there is a form disclosed in Japanese Patent Publication No. 4-72165.

The conventional flexible goniometer has a first rotating body having a graduated scale on the circumference of rotation and a partial mass deviation, and is rotatable concentrically with the first rotating body. And a second rotating body having a pointer that indicates a scale on the rotation circumference of the first rotating body, and the first rotating body and the second rotating body, respectively. It is provided with two stoppers that are temporarily held in a fixed position.

In this flexible goniometer, the flexible goniometer is applied to the first angular position that serves as a reference before bending of the object to be measured, and the first rotating body (disk-shaped pendulum) is placed in a safe position. Wait until the fixed pointer points right above and stands still, push the first stopper to position 0 (zero) on the scale directly above, and then tilt the measurement object, and the scale will make the first rotation. Although the body is tilted in the same way as the object to be measured, the second rotating body and the pointer are in a free state, so they remain pointing up regardless of the tilt of the flexible angle meter itself. Then, the second stopper is pushed in to read the scale at the position where the pointer is stopped and the bending angle of the object to be measured is known.

[0005]

[Problems to be solved by the device]

 However, the conventional flexible goniometer has various problems as follows. It required two disk-shaped rotating bodies, a pointer, and two stoppers to stop both rotating bodies, and the structure was complicated, making it inconvenient to use and causing many failures.

When the object is applied to the measurement object and after the measurement object is moved, the disk-shaped rotating body having the pendulum function sways, and it takes about 10 seconds at maximum until the pointer stably indicates the 0 scale. It took time, and the measurement efficiency was poor. Therefore, it was not suitable for group measurement by a large number of people.

[0007]

[Means for Solving the Problems]

 The present invention solves the above-mentioned problems, and is provided with a code wheel and an encoder module that rotate according to the movement of the pendulum, and digitally displays the measured value via the arithmetic unit 20 in a very short time. It is characterized by that.

That is, according to the first aspect of the present invention, the pendulum 2 and the code wheel 5 are fixed to the rotary shaft 1 provided in the central portion of the case 10, and the encoder module 6 is provided so as to correspond to the code wheel 5. An arithmetic unit 20 is provided in connection with the module 6, and a measurement switch 9 for operating the arithmetic unit 20 is provided outside the case 10, and the position of the pendulum 2 at the first angular position of the case 10 is operated by the measurement switch 9. The reference value 0 ° is digitally displayed on the LCD panel display 7 on the case surface, and then the position of the pendulum 2 at the second angular position of the case 10 is measured. When the switch 9 is operated, the value is stored in the measured value memory 28 in the arithmetic unit 20 and at the same time, the difference calculation circuit 29 stores the reference value A flexible goniometer, characterized in that the displacement angle by calculating the difference so that the digital display on the LCD panel display 7.

A second aspect of the present invention is the flexible goniometer of the first aspect, in which the pendulum 2 has a weight 4 fixed to the outer peripheral portion of the disk 3.

[0010]

[Embodiment of the invention]

 An embodiment of the present invention will be described below with reference to FIGS. In the figure, reference numeral 1 denotes a rotary shaft provided at the center of a flat cylindrical case 10. The rotary shaft 1 has a pendulum 2 having a weight 4 fixed to the outer peripheral portion of a disk 3 and a code wheel (HE DS-). 5120G02: Product number: Hewlett Packard Co., resolution 1 °) 5 is fixed at a fixed interval and corresponding to the code wheel 5 encoder module (HEDS-9700G51: Product number: Hewlett Packard Co., resolution 1 ° ) 6 is provided on the inner surface of the case 10.

The case 10 is made of aluminum, and an arithmetic unit 20 is disposed on the front surface of the case 10. An LCD panel display (SP530P: product number: manufactured by Seiko Electronics Co., Ltd.) is provided on the front side so as to cover the arithmetic unit 20. ) 7 is provided on the front cover 8.

On the other hand, a battery 11 is arranged on the back of the case 10, and a measurement switch (JF-15CKCBNP2: product number: manufactured by Japan Switch Industry Co., Ltd.) 9 is provided on the upper part of the case 10. By pushing the measurement switch 9, the reading value of the code wheel 5 by the encoder module 6 can be digitally displayed on the LCD panel display 7 as 0 (zero) or a measurement angle.

Reference numeral 12 in FIG. 2 denotes a bifurcated contact leg provided on the outer peripheral side of the case 10, and the tip end of the contact leg is applied to an object to be measured to measure an inclination angle (flexible angle). is there.

Further, 13 in FIG. 3 is an ON / OFF switch provided on the front surface of the aluminum front cover 8, 14 is an LED (TLS109A: manufactured by Toshiba Corporation), and 15 is a buzzer ( PKM13EPY-4002: product number: manufactured by Murata Manufacturing Co., Ltd.).

FIG. 5 shows the arithmetic unit 20. In the figure, 21 is a quadruple speed conversion circuit for changing the encoder resolution of 1 ° to 0.25 ° at 4 × speed, and 22 is a pendulum swing for every 0.25 °. A counter, 23 is a max1 detector for checking the maximum output value of the counter, 24 is a min1 detector for checking the minimum output value of the counter, 25 is a max2 detector for checking the second maximum output value of the counter, 26 Is a calculation circuit that calculates the center of swing of the pendulum, 27 is a reference value (zero) memory that stores the center of swing of the pendulum at 0 ° as the center of swing of the pendulum, and 28 is the swing of the pendulum at the second angular position. A measurement value memory that stores the center as a measurement value, 29 is a difference calculation circuit that calculates the difference (angle difference) between the measurement value and the reference value, and 30 is an angle difference (flexible angle) on the LCD panel. LCD panel display control for a digital display, 31 is a LED · buzzer control for the buzzer as well as LED display during measurement.

The signal of the counter 22 which has been subjected to the 4 × speed conversion of the encoder module 6 is sent to the arithmetic circuit 26 via the max1 detecting section 23, the min1 detecting section 24 and the max2 detecting section 25 to determine the amplitude center of the pendulum 2. Then, 0 (zero) is input to the reference value memory 27, the amplitude center of the pendulum 2 is also calculated in the calculation circuit 26 in the measurement value memory 28, and the measured values are input. After being calculated by the difference calculation circuit 29, the value is digitally displayed on the LCD panel display section 7 provided on the front cover 8 via the LCD panel display control 30.

In the LED / buzzer control 31 in the figure, when the measurement switch 9 is pushed, the buzzer sounds at the same time as the LED lights up. The reference value is displayed as 0 ° and the measurement value is displayed as an angle. Is displayed on the LCD panel display unit 7, but the LED / buzzer control 31 is not always necessary.

Reference numeral 32 in the drawing denotes a power supply control for inputting power to the arithmetic unit 20 via the on / off switch 13.

[0019]

[Action]

 Hereinafter, a case of measuring the degree of open leg (flexibility) in the thigh of the human body will be described as an example. First, the bifurcated contact legs 12, 12 of the flexible goniometer are placed vertically on the outer side of the thigh 16 in the upright position as shown in Fig. 3 and lightly pressed, and after 1 second, the measurement switch 9 is pushed. To do.

At this time, the pendulum 2 in the case 10 swings left and right about the rotation axis 1 due to the action of gravity, gradually attenuates, and finally it takes about 10 seconds to fall to the vertical state. In the present invention, the amplitude amount of 3 points from the maximum amplitude is measured at the stage where the pendulum 2 is swung three times by the contact of the contact legs 12 and 12, that is, one reciprocating half swing (the stage about 1 second after the contact point). By doing so, 0 point (vertical state) is calculated, and 0 ° is displayed as a reference value on the LCD panel display section 7.

From this state, the thigh portion 16 is gradually opened, and the measurement switch 9 is pushed at the maximum opened position. At this time as well, the pendulum 2 swings slightly to the left and right, but in the same way as above, the vertical state of the pendulum 2 is calculated in about 1 second, and the LCD panel display unit 7 calculates the difference from the 0 ° to calculate the LCD panel display unit. 7 is digitally displayed as 60 °.

[0022]

[Effect of the invention]

 In the present invention, the code wheel and the encoder module are used to calculate the vertical stable position of the pendulum in a very short time, so that the structure is extremely simple and the cost can be reduced, and the time can be reduced to about 1 second. It became possible to measure in a short time.

In addition, since the structure is simple, there are no failures, and the measured values are displayed digitally, which simplifies the measurement work and makes it possible to support collective measurement.

Therefore, it can be said that the present invention plays an extremely important role in training in the sports field and rehabilitation in the field of orthopedic surgery, and has very high industrial utility.

[Brief description of the drawings]

FIG. 1 is a side view of a longitudinal section of a flexible goniometer according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a front view of a flexible goniometer according to the present invention.

FIG. 4 is a left side view of FIG.

FIG. 5 is a block diagram of an electric system of a flexible angle meter according to the present invention.

[Explanation of symbols]

 1 rotary shaft 2 pendulum 3 disc 4 weight 5 code wheel 6 encoder module 7 LCD panel display 8 front cover 9 measurement switch 10 case 11 battery 12 contact leg 13 on / off switch 14 LED 15 buzzer 20 arithmetic unit

Claims (2)

[Utility model registration claims] 1. A pendulum 2 and a code wheel 5 are fixed to a rotary shaft 1 provided at the center of a case 10, and an encoder module 6 is provided corresponding to the code wheel 5 and is connected to the encoder module 6 to be connected to an arithmetic unit. 20 is provided and a measurement switch 9 for operating the arithmetic unit 20 is provided outside the case 10, and the position of the pendulum 2 at the first angular position of the case 10 is stored in the arithmetic unit 20 by operating the measurement switch 9. 27, and at the same time, the reference value 0 on the LCD panel display 7 on the surface of the case.
Is digitally displayed, and then the position of the pendulum 2 at the second angular position of the case 10 is stored in the measured value memory 28 in the arithmetic unit 20 by the operation of the measurement switch 9 and, at the same time, the difference calculation circuit 29 stores the reference value. A flexible angle meter characterized in that the displacement angle is calculated and the displacement angle is digitally displayed on the LCD panel display 7. 2. The flexible goniometer according to claim 1, wherein the pendulum 2 is a disc 3 having a weight 4 fixed to an outer peripheral portion thereof.