JPH0574503U - Medical portable digital goniometer - Google Patents

Abstract

(57) [Abstract] [Purpose] It is easy to set contact with the human body at an appropriate position.
(EN) Provided is a portable digital goniometer for medical use in which the angle value can be easily seen and the movable range of the angle can be directly read. [Arrangement] One arm 1, the other arm 4, and a hollow shaft 2 that pivotally locks the one arm 1 and the other arm 4;
An angle detector 5 that detects a rotation amount of the other arm 4 with respect to the one arm 1, a signal processing unit 6 that processes a signal output from the angle detector 5, and the other arm 4 with respect to the one arm 1.
And a display 7 for digitally displaying the rotation amount of the signal as an angle, and the angle detector 5, the signal processing unit 6 and the display 7 are provided on one arm 1 or the other arm 4, A see-through window 24 is provided at the center of rotation of the hollow shaft 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a portable digital goniometer for medical use that measures angles of joints, rotating parts, and bending parts of a human body (hereinafter referred to as a patient) undergoing rehabilitation training treatment.

[0002]

[Prior Art]

 As a conventional technique, there is one disclosed in Japanese Utility Model Publication No. 50-144488. The technique disclosed in this publication is composed of a circular substrate integrated with an attachment plate, a scale plate fitted to a shaft attached to the circular substrate, and an operation plate integrated with a pointer. It is a motor function measuring device for limb joints.

As a conventional technique, there is one disclosed in Japanese Utility Model Laid-Open No. 62111/1990. The technique disclosed in this publication is a protractor with an encoder provided with a pair of reference plates, an encoder for detecting the rotation amount, a counting processing unit, and a display unit for displaying the rotation angle.

[0004]

[Problems to be solved by the device]

 With the above-mentioned conventional limb joint motor function measuring device, it is difficult to align the center of rotation of the measuring device with the patient's joint center, and the angle value is difficult to see because the scale of the scale plate and the stated numerical values must be seen. However, it is not possible to judge the angle immediately due to the double display of right and left rotations, and the accuracy of the scale is affected by the diameter of the scale plate, which limits the accuracy of the measured values. is there.

Further, in the protractor with an encoder of the related art, since the encoder is provided on the rotating shafts of the two reference plates, the two rotating shafts are seen through and the two reference points are set at the joint rotating points of the human body. It is difficult to apply the center of rotation of the plate, and the hold function is not disclosed, so the displayed value cannot be read at hand.

The present invention solves the above-mentioned conventional problems, makes it easy to set the patient to an appropriate position, makes it easy to see the angle value, and makes the angle determination immediately. It aims to provide a portable digital goniometer for medical use that can measure the degree.

[0007]

[Means for Solving the Problems]

 That is, according to the present invention, the end of the other arm (4) is rotatably attached to the end of the one arm (1), which is brought into contact with the measurement site of the human body, through the hollow shaft (2), and the one arm The angle detector (5) that detects the amount of rotation of the other arm (4) with respect to the arm (1), the signal processing unit (6) that processes the signal output by the angle detector (5), and the one arm (1 Is displayed on the one arm (1) or the other arm (4) by digitally displaying the rotation amount of the other arm (4) as an angle. It is a portable digital goniometer for medical use.

Further, the signal processing unit (6) in the present invention has a hold / release function unit (21) for holding and releasing the display value of the display (7), and is provided in the hollow shaft (2). A mark indicating the center of rotation of the two arms is added, and a center line (22) is provided at the center of the width of one or both arms to facilitate positioning on the human body and at the time of reset. The device is designed to make it easier to see the positional relationship between the two arms.

Further, a resistance function part (25) that acts on a rotating portion between the one arm (1) and the other arm (4) to generate a resistance force when the two arms rotate is provided with a one arm (25). 1) or the hollow shaft (2) or the other arm (4), the angle detector (5) is composed of a magnetic drum (12) and a magnetoresistive element (13).

[0010]

【Example】

 Next, an embodiment of the present invention will be described with reference to FIGS. 2, 4 and 5. As shown in FIG. 2, the one arm 1 is made of a transparent resin-made long thin plate material, its longitudinal ends are formed in a semicircular shape, and a small radius is provided in the traverse portion. , Removal of discomfort during contact with the patient's epidermis, safety and grace are achieved. On the other hand, a center line 22 is drawn along the longitudinal direction of the arm 1 at the center in the width direction.

The hollow shaft 2 has a cylindrical shape with a transparent window 24 inside, and is attached to one end of the arm 1 and the upper surface in the vicinity of the one end. Is inserted and fixed. The center of rotation of the transparent plate 3 is marked with a center point 3a formed by two orthogonal lines.

The other arm 4 has the same shape as the one arm 1 in plan view, and is made of a thin plate in a flat case shape. One end portion and the vicinity of the one end portion are hollow shafts 2 of the one arm 1. It is rotatably fitted in.

As shown in FIG. 4, inside the other arm 4 having the flat case shape, a transmission mechanism 11 for transmitting the rotation amount of the other arm 4 with respect to the hollow shaft 2 and a transmitted rotation amount are detected. Angle detector 5, a signal processing unit 6 for processing the signal output by the angle detector 5, a display 7 for digitally displaying the processed signal, a battery 14, a reset switch 15 and a hold on the side wall 4a. A release switch 16 is provided so that the display unit 7 can be seen from the upper surface 4b.

The transmission mechanism 11 includes a first intermediate gear 9 that meshes with a gear 8 that is fitted around the outer circumference of the hollow shaft 2, and a second intermediate gear 10 that meshes with the first intermediate gear 9. The magnetic drum 12 constituting the angle detector 5 is attached to the other arm 4 so as to mesh with the second intermediate gear 10.

The transmission mechanism 11 including these gear groups includes a bearing portion on both ends of the shaft of the first intermediate gear 9, a bearing portion on both ends of the shaft of the second intermediate gear 10, and a meshing portion of the gear 8 and the first intermediate gear 9. , And frictional resistance is generated in the meshing portion of the first intermediate gear 9 and the second intermediate gear 10, so that in addition to the transmission function of transmitting the rotational force of the other arm 4 to the magnetic drum 12, It also has the function of giving resistance. That is, the transmission mechanism 11 also has a resistance function when opening and closing both arms, and plays a role of preventing loose movement of both arms.

In the case of another embodiment shown in FIG. 7 in which the transmission mechanism 11 is replaced by a gear group and is constituted by a belt 27, the conduction mechanism 11 cannot have a resistance function. , A doughnut-shaped ring 28 made of Teflon material, rubber material, or friction material is fitted, and the ring 28 is sandwiched between the one arm 1 and the other arm 4 and further rotated together with the hollow shaft 2. In addition, the pulley 29 that slides in the axial direction is fitted, and the presser tool 30 that simultaneously pushes the pulley 29, the other arm 4 and the ring 28 against the one arm 1 is screwed to form the resistance function part 25. According to this configuration, when one arm 1 or both arms 1 and 4 rotate, a resistance force is generated between both arms. Instead of the belt 27, a chain, a friction wheel or the like may be used.

The transmission mechanism 11 doubles the speed of the hollow shaft 2 and the first intermediate gear 9 by setting the gear ratio to 2: 1, and the first intermediate gear 9 and the second intermediate gear 10 have a gear ratio of 4.5. As a pair 1. The speed is increased to 5 times, the second intermediate gear 10 and the magnetic drum 12 are increased to 5 times with the gear ratio of 5: 1, and finally the number of rotations of the hollow shaft 2 is increased to 45 times. The rotation of the hollow shaft 2 is transmitted to the magnetic drum 12 of the angle detector 5. Eight sets of magnetic drums 12, one set of which NS poles are alternately arranged, are continuously arranged at equal intervals on the outer circumference of the disk.

As shown in FIGS. 1 and 4, the angle detector 5 is provided with a magnetized disk-shaped magnetic drum 12, and is provided close to the outer peripheral edge of the magnetic drum 12. The magnetoresistive element 13 generates a pulse by moving magnetism, and two magnetic resistance elements 13 are provided on the other arm 4 at a distance from each other.

The other arm 4 is capable of rotating over 360 degrees with respect to the one arm 1, and when the other arm 4 makes one rotation, the magnetic drum 12 makes 45 rotations, and 360 pulses from the magnetoresistive element 13. Come out. When the 361st pulse appears, the other arm 4 makes one rotation and returns to the original position, and the displayed value also returns to the original display.

As shown in FIGS. 1, 3 and 4, the signal processing unit 6 provided between the magnetoresistive element 13 of the angle detector 5 and the display 7 controls the rotation amount of the magnetic drum 12 by the magnetoresistive element. The output of the magnetoresistive element 13 is read as the number of pulses, and the discriminating function unit 17 for discriminating the rotating direction of the magnetic drum 12 and the pulse output from the discriminating function unit 17 are used to determine the number of pulses. The counter function unit 18 for calculating and an LCD drive function unit 19 for producing an output of the counter function unit 18 to generate a voltage for driving an LCD (= liquid crystal). The relative rotation angle of both arms is digitally displayed on the display 7 as an output of the LCD drive function section 19.

The discriminating function unit 17 discriminates the rotating direction of the other arm 4 from the one arm 1, and no matter how many times it is rotated in any direction during the measurement, the reverse rotation amount is added to the measured value and goes wrong. Such a situation does not occur and the angle can be accurately measured.

The counter function unit 18 has a reset function unit 20 for setting the numerical value of the display unit 7 to zero and for setting the angle measuring instrument of the present invention to an angle measurement start state, and for holding or releasing the numerical value of the display unit 7. The hold / release function section 21 is connected.

If the reset function unit 20 that returns the display value to zero and sets the angle measurement start state is operated, no matter what angle the two arms make by the reset operation, the angle is used as a base point and the position is set as the position. The rotation angle from can be measured. That is, even if the angle formed by the two arms is not necessarily zero, only the angle rotated from the position where the reset switch 15 is pressed as the base point can be measured. Even if the practitioner does not perform the calculation of subtracting the angle before rotation from the angle after rotation as in the past, the same value as that calculated is displayed, so the angle formed by the two arms With any angle, the angle of rotation, that is, the relative angle, can be measured immediately with that angle as the base point. That is, the zero degree of the base point can be arbitrarily determined, and the range of motion can be measured without subtracting the angle before rotation from the angle after rotation.

The reset function unit 20 is connected to a reset switch 15 that is pressed when resetting the counter function unit 18, and the hold / release function unit 21 is pressed to hold and release the display of the display 7. The release switch 16 is connected. The reset switch 15 and the hold / release switch 16 are both push-button switches that automatically return by springs.

Reference numeral 23 in FIG. 2 is a scale provided near the side of the one-sided arm 1 for measuring the length. Further, in the other arm 4, the reset switch 15 and the hold / release switch 16 are provided at positions that can be operated when the user grips the other arm 4. Reference numeral 26 in FIG. 4 denotes a substrate on which electronic parts are assembled to form an electric circuit.

[0026]

[Action]

 An example of measuring the rotation angle of the elbow joint of the human body will be described below. First, the goniometer according to the present invention is brought into contact with the arm of a patient as shown in FIG. At that time, the central portion of the hollow shaft 2 is viewed as a see-through window 24, the rotation center of the hollow shaft 2 is applied to the rotation center of the elbow joint, the lower surface of one arm 1 is brought into contact with the upper arm, and the other arm 4 of the other arm 4 is contacted with the forearm. Abut the bottom surface.

At the time of contact, the center line 22 extending in the longitudinal direction at the width center of the transparent one arm 1 is aligned with the humerus along the extension direction thereof, and the lower surface of the one arm 1 is applied to the upper arm. Similarly, the center line 22 extending in the longitudinal direction at the width center of the other arm 4 is aligned with the radius along the extension direction, and the lower surface of the other arm 4 is applied to the forearm. The other arm 4 may be applied to the upper arm and the one arm 1 may be applied to the forearm for measurement.

Further, looking through the transparent window 24 at the center of the hollow shaft, the center of rotation of the hollow shaft 2 of the two arms is aligned with the center of rotation of the elbow. If the user marks the rotation center point of the joint of the patient in advance, the work of aligning the center point 3a drawn on the transparent plate 3 of the transparent window 24 with the mark becomes extremely easy, and an unskilled person However, the device of the present invention can be easily applied to the appropriate measurement site of the patient, and accurate measurement can be performed.

In the case where the transparent plate 3 is not fitted into the see-through window 24 but is hollow, the turning center of the two arms is aligned with the turning center point of the elbow while looking through the see-through window 24. Further, in this case, the patient's epidermis can be marked by passing a writing instrument through the transparent window 24.

A resistance due to the conduction mechanism 11 acts on the rotating portion between the one arm 1 and the other arm 4, and the resistance between the two arms is such that the angle does not change due to the weight of one arm. Power is added.

Next, the reset switch 15 is pressed to put the instrument in the measurement start state. Regardless of the angle of the two arms, the angle at the time when the reset switch 15 is pressed becomes the base point of the angle measurement, and the displayed value of the angle becomes zero.

At the time of the reset operation, a center line 22 passing through the hollow shaft 2 facing the longitudinal direction of the arms and a straight line extending from the center line 22 of the transparent plate 3 in the hollow shaft 2 are provided on both arms. At the center of rotation of both arms, a straight line that intersects the straight line at 90 degrees is drawn. When you want to make the angle between both arms 90 degrees or 180 degrees, the angle adjustment is This can be done accurately by aligning the center line 22 and the intersection line with each other.

The patient rotates the forearm around the elbow. The user measures while moving the arm 1 on the one hand and the arm 4 on the other hand in accordance with the movement of the patient. Both arms may be fixed to the forearm and upper arm by an appropriate method, or immediately after the patient pivots the forearm, the other arm 4 is quickly applied to the pivot end of the forearm to adjust the pivot angle of the elbow joint. measure.

When the two arms rotate with respect to each other, the hollow shaft 2 is fixed to the one arm 1, so that the other arm 4 rotates with respect to the hollow shaft 2 and the hollow shaft 2 rotates. The conduction mechanism 11 conducts to the angle detector 5. Since the transmission mechanism 11 is composed of a combination of gears, the axial friction and meshing friction of this gear group act as a resistance force that prevents the two arms from rotating. Therefore, the transmission mechanism 11 including the gear group has a transmission function and a resistance function.

On the display unit 7, the amount of rotation of the other arm 4 with respect to the one arm 1 after pressing the reset switch 15 is numerically displayed as a rotation angle.

The turning angle is measured when the forearm reaches the turning end, and the hold / release switch 16 is pushed at that time. By this operation, the numerical value displayed on the display 7 at that time is held. Once the numerical value is held, the displayed value remains fixed regardless of how much the angle formed by the one arm 1 and the other arm 4 is changed.

The displayed value may be read while the instrument is in contact with the human body, but the measured value does not change even if the angles of the two arms are changed. Therefore, the instrument is usually kept away from the human body and the instrument is brought close to the user. Read the displayed value. In this way, the range of motion of the patient's joint can be read directly.

When the measurement is completed, the hold / release switch 16 is pushed again to release the hold / release function section 21 of the signal processing section 6 to release the hold of the display value. When this release operation is performed, the amount of change in rotation when the reset switch 15 is pressed, that is, from the base point to the current angle between the two arms, is displayed on the display 7.

When the measurement is completed, the reset function unit 20 may be operated by pressing the reset switch 15. When the reset operation is performed, the angle measurement starts, the display of the angle between the two current arms is canceled to zero, and the angle between the two current arms changes to the measurement base point. By the reset operation, the measurement base point can be arbitrarily determined regardless of the angle between the two arms.

Before performing the measurement, the hold / release switch 16 is pressed to hold the displayed value, and the hold / release switch 16 is pressed again at the time of measurement, that is, at the time of reading the angle to release the hold of the displayed value and measure. There is also a method of measurement in which the power angle is displayed and then the hold / release switch 16 is pressed again. In the case of this measurement method, it is possible to eliminate the inconvenience that the displayed value changes frequently when the angle changes and it is difficult to read.

The magnetic drum 12 and the magnetic resistance element 13 detect a signal of an angle formed by the two arms, and the discrimination function unit 17 rotates the signals output from the two magnetic resistance elements 13 respectively. Discriminate the direction.

The signal obtained from the magnetoresistive element 13 is digitally processed by the signal processing unit 6. That is, the discriminating function unit 17 in the signal processing unit 6 discriminates the rotation direction of the arm, the counter function unit 18 calculates the angle, and further the command signal and the reset function unit of the hold / release function unit 21 described above. 20 command signals are obtained, the calculated values are reset and reset released according to those commands, and the display value is held or released.

[▲ 0043]

[Effect of the device]

 The portable digital digital goniometer of the present invention is a small and lightweight instrument of the present invention for measuring angles of joints, rotating parts, and bending parts of a human body undergoing rehabilitation training treatment. It is very convenient to use because it can be made portable so that it can be put in the pocket of clothes. For example, when the measurement site is an elbow joint or the like, both arms can be easily brought into close contact with the side surface of the arm orthogonal to the rotation center axis of the elbow during measurement, so that an accurate measurement value can be obtained.

Further, since the rotation fulcrum of the two arms serves as a hollow shaft and plays the role of a see-through window, when the patient comes into contact with a joint or the like, the center of rotation of the hollow shaft is moved through the see-through window. It has the effect that it can be easily and accurately applied to the center of rotation and that it can be accurately measured.

When a transparent plate having a center point made of intersections of straight lines intersecting with each other at 90 degrees is fitted to the see-through window, the center point of the patient should be set when determining the position to contact the patient. Positioning is easy because it can be adjusted to the joint rotation point. Further, when the joint is bent or extended, the pivot point of the instrument and the pivot point of the patient can be made to coincide with each other, so that the displacement between the patient and the instrument can be reduced, and the measurement can be performed accurately and easily. is there.

If an expert makes a mark in advance on the patient's skin or the like before the measurement, it is easy for an unskilled person to see the rotation center of both arms while seeing this mark through the see-through window. The device can be applied to the appropriate position. It is also possible to put a mark on the patient's skin etc. by penetrating the writing instrument into the transparent window after applying this instrument to the affected area, and in this case, it will be used as a mark for re-measurement. As a result, the work of determining the position to contact the patient is facilitated, and there is an effect that the same site can be accurately measured again.

In addition, a center line passing through the center of rotation of the hollow shaft along the longitudinal direction is drawn in the center of the width of each of the two arms, which facilitates positioning when applying to a patient and resets. When I tried to implement it, it became easier to see the positional relationship between the position where both arms were straight and the position where both arms were orthogonal.

In addition, since the transmission mechanism generates a rotation resistance between the one arm and the other arm to the extent that the other arm does not rotate under its own weight with respect to the other arm, the two arms do not rotate. You can save the angle you make, and it is convenient to handle the instrument during measurement. In the present invention, since the transmission mechanism that transmits the rotation of the hollow shaft to the magnetic drum is composed of a gear group, frictional resistance of the gear shaft and meshing frictional resistance between the gears are generated, and between both arms. These frictional resistances work as rotational resistances. Therefore, the resistance function section also serves as the transmission mechanism of the multiple gear structure, and there is no need to provide a special resistance function section between both arms, which simplifies the structure and reduces the manufacturing cost.

Further, since the angle detector is made of the magnetic drum and the magnetic resistance element, both arms can be measured without any inconvenience even if rotated over 360 degrees, and can be manufactured at low cost. There is an effect that the angle can be accurately detected.

Further, according to the present invention, since the signal processing section has the hold / release function section for holding and releasing the display value of the display unit, it is possible to measure the time when the forearm reaches the rotation end. By operating the hold / release function section, the displayed numerical value can be held. If you hold the value at the time of reading the angle measurement, the displayed value will not change, no matter how much the angle between the one arm and the other arm is changed. Therefore, it is possible to read the displayed value by moving the instrument away from the patient and to the hand, and if it is used in this way, it is easy to see the displayed value and it is easy to judge the rotation angle and the range of motion of the joint. In addition, if the hold / release function is activated during measurement work and the hold / release function is released at the joint rotation end, the mood may change due to changes in the displayed value during measurement, or the measurement may change. This has the effect of making it easier to see the displayed value by eliminating the adverse effects of making it difficult to read the value.

[Brief description of drawings]

FIG. 1 is a block diagram of a configuration of a portable digital digital goniometer for medical use according to the present invention.

FIG. 2 is an overall perspective view of a medical portable digital goniometer according to the present invention.

FIG. 3 is a block diagram of the inside of a signal processing unit of the medical portable digital goniometer according to the present invention.

4 is a cross-sectional view of the portable digital goniometer for medical use according to the present invention taken along the line AA of FIG.

5 is a cross-sectional view of the portable digital goniometer for medical use according to the present invention taken along the line BB in FIG.

FIG. 6 is a view showing a use state of the portable digital digital goniometer for medical use according to the present invention.

FIG. 7 is a partial cross-sectional view showing another embodiment of the resistance function unit of the present invention.

[Explanation of symbols]

 1 One Arm 2 Hollow Shaft 3 Disc 4 Other Arm 5 Angle Detector 6 Signal Processing Section 7 Display 8 Gear 9 First Intermediate Gear 10 Second Intermediate Gear 11 Conduction Mechanism 12 Magnetic Drum 13 Magnetic Resistance Element 15 Reset Switch 16 Hold- Release switch 17 Discrimination function unit 18 Counter function unit 20 Reset function unit 21 Hold / Release function unit 22 Center line 23 Scale 24 Perspective window 25 Resistance function unit

Claims (6)

[Scope of utility model registration request] 1. An end of one arm (1), whose lower surface is brought into contact with a measurement site of a human body, is rotatably attached to an end of the other arm (4) via a hollow shaft (2), and the one arm is fixed. (1)
An angle detector (5) for detecting the rotation amount of the other arm (4) with respect to the other arm, a signal processing unit (6) for processing a signal output from the angle detector (5), and the other arm (1) for the one arm (1). A portable digital gonio for medical use characterized in that a display (7) for digitally displaying a signal by processing the amount of rotation of 4) as an angle is provided on the one arm (1) or the other arm (4). Meter. 2. A mark is provided inside the hollow shaft (2) for indicating the center of rotation of one arm (1) and the other arm (4), and the mark is made to coincide with the center of rotation of a joint of a human body. The portable digital goniometer for medical use according to claim 1, which is used as a guide. 3. A center line (2) at the widthwise center of either one arm (1) or the other arm (4) or both arms.
2. The portable digital goniometer for medical use according to claim 1, wherein 2) is drawn. 4. The rotating mechanism between the one arm (1) and the other arm (4) is characterized in that a resistance force is generated when the two arms are rotated by utilizing the transmission mechanism 11. A portable digital goniometer for medical use according to claim 1. 5. An angle detector (5) is attached to a magnetic drum (12).
The portable digital goniometer for medical use according to claim 1, characterized by comprising a magnetic resistance element (13). 6. The signal processing section (6) has a hold / release function section (21) for holding and releasing the display value of the display (7).
The portable digital goniometer for medical use described.