JP2531673Y2 - Angle measuring tool - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATIONS This invention is an angle measuring device used as a means of evaluating functional status after trauma and diagnosing postoperative functional recovery in the field of orthopedics as well as the hand. It is about.

Conventional technology and its problems Conventional measuring instruments of this type include angle measuring instruments with a scale of metal or plastic, but measuring instruments with improved speed and accuracy due to troublesome reading and misreading are demanded. Was.

Therefore, the present invention has been developed to meet the above-mentioned demands, and the clear digital display can eliminate the inconvenience and erroneous reading by the conventional scale, and can reduce the size and weight to fit in the palm of the hand. Another object of the present invention is to provide an angle measuring instrument which is convenient to carry and has excellent operability.

Means for Solving the Problems In order to achieve the above object, the angle measuring device according to the present invention includes a box-shaped case large enough to fit in the palm of a hand, and has a straight line on one side of the back surface of the case and at the time of measurement. A reference plate forming an edge is provided so as to be foldable so that one end of the reference plate is pivotally supported by one end of one edge of the case and fits within the bottom surface of the case. When forming the reference plate, an engagement portion for fixedly engaging the reference plate with the case is provided on the pivot portion, and the measurement plate that rotates by a predetermined angle with respect to the reference plate at the time of measurement has one end of the case. The other end of one edge is pivotally supported by a pivot and provided to be foldable so as to fit within the bottom surface of the case.
The extension auxiliary plate is detachably connected to the other end of the reference plate so as to be linear with the reference plate, and the extension auxiliary plate is detachably attached to the other end of the measurement plate so as to be linear with the measurement plate. It is connected to. A contact type rotary encoder having a substrate having a pattern electrode and a brush, and a rotor mechanically coupled to a pivot and transmitting the rotation thereof; and a counter control circuit for counting the output of the rotary encoder. Is provided in the case, and a digital display unit for displaying the output of the counter control circuit is provided on the surface of the case.

According to the above-described operation, for example, as a post-operative hand function recovery diagnosis, to measure the bending angle toward the back of the hand, take out the reference plate and the measurement plate in a folded state within the bottom surface of the case, The reference plate is fixedly engaged with the case by an engaging portion so as to form a straight edge with one edge of the case, and an extension auxiliary plate is connected to the reference plate, while the measurement plate is also extended. Connect the auxiliary plate. Then, the case with the extension auxiliary plate attached thereto is placed on the hand, and the extension auxiliary plate on the side where the measuring plate is located is brought into contact with the back of the bent hand. Thus, the rotation angle of the extension auxiliary plate on the side of the measurement plate in contact with the back of the hand, that is, the angle when the measurement plate is positioned so as to form a straight line with the reference plate, is 0 °.
Then, the rotation angle from this position is transmitted to the rotor from the pivot provided on the other end side of one edge of the case. And the brush of the rotor contacts the pattern electrode of the substrate,
The rotary encoder outputs this as a pulse signal, and the output signal is counted by the counter control circuit, and the counted output value is displayed on the digital display unit.

Embodiment 1 In FIG. 1, reference numeral 1 denotes an angle measuring tool having a rectangular box-shaped case 2. As shown in Figs. 2 and 3,
The mounting plate 3 is fixed by screws or the like, and a reference plate 4 that forms a linear edge with the lower edge of the case 2 at the time of measurement is attached to the mounting plate 3. And is foldable as shown in FIG. Reference numeral 6 denotes a pivot hole pivotally supported by the pivot 5, and a perfect circular hole 6a.
And a square hole 6b communicating therewith. When the reference plate 4 forms a straight edge with the lower edge of the case 2,
The not-illustrated non-circular portion of the pivot 5 fits into the square hole 6b to engage and fix the reference plate 4, and when the reference plate 4 is folded on the back surface of the case 2, the non-circular hole becomes a perfect circle. The reference plate 4 can be rotated by fitting into the hole 6a.

One end of an auxiliary plate 7 is pivotally supported on the other end of the reference plate 4 by a pivot 8.
In order to form a straight line, a notch 11 is formed to engage with an engaging pin 10 protruding from the reference plate 4. Reference numeral 12 denotes an engagement hole of an extension auxiliary plate. When the auxiliary plate is further extended to the auxiliary plate 7, an engagement pin 14 provided at one end of the extension auxiliary plate 13 is engaged with the engagement hole 12. Let it.

A measurement plate 16 that rotates by a predetermined angle at the time of measurement is provided at one end thereof at the other end of the lower edge of the case 2 by a pivot 17 so as to be foldable. One end of an auxiliary plate 18 is also pivotally supported at the other end of the measurement plate 16 by a pivot 19, and the pivot 19
When the auxiliary plate 18 around the measuring plate 16 is linear, the measuring plate
A notch 21 that engages with an engagement pin 20 protruding from 16 is formed. Reference numeral 22 denotes an engagement hole of an extension auxiliary plate. When the auxiliary plate is further extended to the auxiliary plate 18 similarly to the reference plate side, an engagement pin 24 provided at one end of the extension auxiliary plate 23 is used. The engaging hole 22 is engaged.

4, 5, and 6, reference numeral 25 denotes a contact rotary encoder, which comprises a dish-shaped substrate 26 fixed to the case 2 and a rotor 27. A comb-shaped pattern electrode 28 is provided on the inner surface of the substrate 26.
Is formed by printing or the like, and the rotor 27 has a pattern electrode
A brush 29 that slides on the brush 28 is provided. At the center of the rotor 27, a rotating shaft 31 supported by a bearing 30 on a substrate lid is provided. A gear 32 is mounted on an end of the rotating shaft 31 protruding above the substrate cover, and a gear 33 mounted on an end in the case of the pivot 17 supporting the measuring plate 16 is engaged with the gear. Have been. Reference numeral 35 denotes an output terminal of the rotary encoder 25, which is connected to the counter control circuit 36,
The output terminal 36 is connected to the liquid crystal digital display 37 on the surface of the case shown in FIG. 38 is a display clear switch. In FIG. 4, reference numerals 39 and 40 denote battery electrodes, and in FIGS. 2 and 3, reference numeral 41 denotes a battery lid.

In the above, the rotation of the measuring plate 16 is transmitted to the rotor 27 via the gears 33,32. That is, the amount of rotation (measured value) of the measurement plate 16 is converted into the rotation angle of the rotor 27. Rotor 27
The brush 29 contacts the pattern electrode 28 of the substrate 26, and a pulse signal having a phase shift indicated by A and B in FIG. The rotation direction of the rotor 27 can be detected from the phase difference between A and B, and the rotation angle can be detected from the number of pulses. When the output of the rotary encoder 25 is input, the count control circuit 36 counts the number of pulses of the input signal, performs an arithmetic operation on the counted output value, and displays the output value on a liquid crystal digital display unit.
Send to 37. The liquid crystal digital display section 37 digitally displays the transmitted output value. At this time, the following usage is also possible. That is, an output terminal is provided on the side wall of the case 2, and the digital signal is printed out by a printer connected to the terminal via a lead wire or processed by a computer.

Next, a specific example of use will be described with reference to FIG.
FIG. 8 (A) shows a case where the bending angle toward the back of the hand is measured. The reference plate 4 and the measuring plate 16 are removed from the state folded in the case 2 and the respective auxiliary plates are measured.
Straighten 7,18 from the folded state and cut out 11,2
1 is engaged with the engagement pins 10 and 20. Thereafter, the reference plate 4 and the auxiliary plate 7 are formed so that the non-circular portion of the pivot 5 is located in the square hole 6b of the pivot hole 6 of the reference plate 4 so that the lower edge and the straight edge of the case 2 are formed. After being fixedly engaged, the measuring plate 16 and the auxiliary plate 18 are brought into contact with the bent holes of the hand while being placed on the hand and making contact. At the time of this measurement, for example, the liquid crystal digital switch is set by the clear switch 38 so that the rotation angle of the measurement plate 16 is at a position of 0 ° on an extension line that is in a straight line with the reference plate 4 in advance, that is, on the line of the measurement plate 16 in FIG. The display 37 is cleared.

By doing so, the angle of the measuring plate 16 in contact with the bent back of the hand with respect to the extended line is digitally displayed on the liquid crystal digital display unit 37, and the bending angle of the back of the hand is accurately measured. As shown in FIG. 1, the display on the liquid crystal digital display 37 can be displayed clockwise and counted up to a range of about 110 °, and counter-clockwisely counted down to a range of about −90 °. In the case of plus display, for example, 105.5 °, the display is as shown in FIG. 9 (A), and in the case of minus display, eg, −28 °, the display is as shown in FIG. 9 (B).

FIG. 8 (B) shows the case where the bending angle of the arm joint is measured, and FIG. 8 (C) shows the case where the bending angle of the knee joint of the foot is measured. In these cases, it is necessary to extend the straight line of the reference plate 4 and the measuring plate 16 to make it easier to measure. Therefore, the extension auxiliary plates 13 and 23 are engaged with the engaging pins 14 and 24 respectively and the engaging holes 12 and 22 are engaged. By doing so, they are connected to the auxiliary plates 7, 18. And
While the extension auxiliary plate 13 fixedly engaged as described above abuts on one side of the bent portion, the auxiliary plate 23 is rotated to abut on the other side. Accordingly, the bending angle is digitally displayed on the liquid crystal digital display unit 37 in the same manner as described above. As a part to be measured, in addition to the above, there is, for example, an angle between fingers.

The above-described embodiment is merely a preferred example, and the rotary encoder 25 and a coupling mechanism mechanically coupled to the rotary encoder 25 can be variously changed or modified in design without changing the gist of the invention. It is.

Effect of the invention In the angle measuring device of the invention, the reference plate is taken out of the folded state in the bottom of the case, and engaged with one edge of the case in a straight line, and extended to the reference plate. By connecting the auxiliary plate and abutting on one side of the bent measurement site, take out the measurement plate in the same way, connect the extension auxiliary plate to this measurement plate and abut on the other side of the measurement site The bend angle at the measurement site can be measured with one touch, and the measured value is displayed on a digital display provided on the surface of the case and can be read clearly, so that the trouble and misreading caused by the conventional scale are completely eliminated. Can be eliminated. Also, if the case is large enough to fit in the palm of your hand, if you remove the extension auxiliary plate, fold the reference plate and measurement plate and put it on the back of the case, it will be extremely small and lightweight as a whole, It is convenient to carry and easy to use and easy to use. In addition, since it has an extension auxiliary plate that is detachably connected, there is an excellent effect that it is suitable for a measurement part having a large bend that is easy to measure when a straight line is extended, such as a knee joint of an arm or a leg, and the like. .

[Brief description of the drawings]

FIG. 1 is a front view of an angle measuring device showing one embodiment of the present invention, FIG. 2 is an enlarged rear view of the same reference plate and measuring plate folded, and FIG. FIG. 4 is an enlarged rear view of an example of the measurement plate taken out of the folded state. FIG. 4 is a front view showing a state where the reference plate and the mounting plate for the measurement plate are removed and the battery lid is removed. FIG. 6 is a longitudinal sectional view of the same, FIG. 6 is a front view of a substrate having a pattern electrode, FIG. 7 is a waveform diagram of a pulse signal as an output signal of an encoder, and FIGS. 8 (A), (B) and (C). 9) are main part front views showing examples of use, respectively, and FIGS. 9 (A) and 9 (B) are front views showing examples of display on the liquid crystal digital display section. 1 Angle measuring device, 2 Case, 4 Reference plate 5, 17 Axis, 7, 18 Auxiliary plate 13, 23 Extension auxiliary plate, 16 Measurement plate 25 Contact Type rotary encoder 26 ... board, 27 ... rotor, 28 ... pattern electrode 29 ... brush, 36 ... counter control circuit 37 ... liquid crystal digital display

Claims (1)

(57) [Scope of request for utility model registration] A reference plate (4) having a box-shaped case (2) large enough to fit in the palm of a hand and forming one edge on the back surface of the case (2) and a straight edge during measurement. One end is pivotally supported on one end of one edge of the case by a pivot (5) and is foldably provided to fit within the bottom surface of the case. When this reference plate forms a straight edge with one edge of the case, An engagement portion for fixedly engaging the reference plate (4) with the case (2) is provided on the pivot portion, and a measurement plate (16) that rotates a predetermined angle with respect to the reference plate (4) during measurement. , One end of which is pivotally supported on the other end side of one edge of the case by a pivot (17) and is foldably provided so as to fit within the bottom surface of the case, and an extension auxiliary plate is provided at the other end of the reference plate (4). (13) is detachably connected to the reference plate so as to be linear, and is extended to the other end of the measurement plate (16). Co plate (23) is removably connected so that the measurement plate and the linear, pattern electrodes (28)
A substrate (26) having a brush (29) and a pivot (17)
Rotor (2)
7) and a contact type rotary encoder (25)
A counter control circuit (36) for counting the output of the rotary encoder is provided in the case (2), and a digital display section (37) for displaying the output of the counter control circuit is provided on the surface of the case (2). An angle measuring tool characterized in that: