JPH019532Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention mainly relates to a medical goniometer equipped with a protractor.

<Prior Art> Although not a medical goniometer, there is an angle measuring device equipped with a protractor described in Japanese Utility Model Application Publication No. 1779/1988 (hereinafter referred to as the first reference). This angle measuring device is characterized in that a retractable fixed rod is attached to the scale reference point of the protractor, and a retractable rotary rod is attached so as to be rotatable about the center of the protractor.

In addition, as a second prior art, Utility Model Application No. 49-9258
There is a rotary protractor described in the above publication (hereinafter referred to as the second reference).

This protractor, like the first reference, is a protractor with a rotating rod and a fixed rod with a scale rotatably attached to it.

Furthermore, in Utility Model Application Publication No. 55-46229, there are two 180
A device in which degree protractors are pivotably connected to each other (hereinafter referred to as the third reference) is described.

<Problem that the invention attempts to solve> The method of using the angle measuring instrument in the first reference is explained by
An example will be explained in which the mutual angles of three objects, B1 _{and B1} , which have been displaced due to bending or the like, are measured.

First, two telescopic rods are applied to A and B, respectively, and the angle α ₁ formed by A and B is visually read.

Next, rotate the rod that was placed on B and place it on _B1 , and visually read the angle _α2 formed by A and _B1 .

However, in this angle measuring instrument, B and B
To find the displacement angle α ₃ formed by B ₁ caused by the displacement of , calculate the angle α ₁ visually read last time and the angle α ₂ visually read now (α ₃ = α ₂ − _{α 1} ). There must be. This has the disadvantage that it requires a great deal of effort and time when examining a large number of patients in the medical field, since it is necessary to memorize or write down the previous visual reading angle α ₁ .

Furthermore, the second reference is merely an improved rotary protractor having the same configuration as the first reference for the purpose of mass production and cost reduction. Therefore, it has the same drawbacks as the first reference cited above.

And the third reference is two 180 degree protractors,
They are simply pivoted around the same center with their respective centers aligned, and do not even have a rotating rod for measurement. Therefore, when investigating the displacement angle, even the measurement method of the first reference cannot be used.

As will be described in detail below, the present invention aims to eliminate such drawbacks and to provide a goniometer with various improvements for use in medical applications.

<Means for Solving the Problems> The structural features of the angle meter of the present invention include a linear scale 1 consisting of a straight plate 10 having a locking hole _P1 and a pointer 8 at one end, and a locking hole P1 in the center. P ₂ and a straight plate 10' at the other end of the protractor disk 9.
and a subscale scale 3 consisting of a semicircular plate with a locking hole P ₂ in the center, while linear scales 1 and 2 have auxiliary scales 7 and 7' that can extend and contract on both linear plates 10 and 10'. , provided on either or both of the main scale 2, and furthermore, both the linear plates 10, 10' and the auxiliary scale 7,
A base line 4 is provided at the center of 7', and the above-mentioned locking hole is
A locking tool is inserted through and fixed to P ₁ , P ₂ , and P ³ so that the linear scale 1, the main scale 2, and the subscale 3 are rotatable, and the auxiliary scales 7 and 7' The reason is that it can be expanded and contracted.

By providing this angle meter, the present invention has achieved the above objectives.

<Function> The function of this goniometer will be explained based on FIGS. 6 to 8 (the figures are explanatory diagrams for measuring the degree of bending of the arm of a patient undergoing rehabilitation treatment, etc.).

Place the horizontally extended linear scale 1 and the principal protractor scale 2 on the horizontally extended arm u. At this time, the linear scale 1
The pointer 8 points to 0 degrees on the protractor disk 9 of the main protractor scale 2 (Fig. 6).

Next, the linear scale 1 and the principal scale 2 are bent so as to correspond to the shallowly bent arm u, and are applied to the arm u. The angle at this time is read from the angle of the protractor disk 9 of the main protractor scale 2.

Then, in preparation for the next bending of arm u, subscale 3
, and align the 0 degree scale of the subscale 3 with the pointer 8 of the linear scale 1 (FIG. 7).

In order to correspond to the arm u that is bent more deeply than the state shown in FIG. 7, the linear scale 1 and the principal scale 2 are bent and applied to the arm u. At this time, the bending angle of the arm u from the state shown in FIG. 6 can be determined by reading the scale on the protractor disk 9 of the main protractor scale 2. The bending angle (shift angle) of the arm u from the state shown in FIG. 7 can be determined by reading the scale of the subscale 3.

In this way, this angle meter is capable of continuously measuring three or more consecutive bends, and can continuously measure the sequentially changing displacement angle without calculation.

<Example> An example of the present invention will be described based on FIG. 1.
A linear scale 1 whose tip part forms a pointer 8 and a locking hole P ₁ is provided in the vicinity thereof, and a main scale having a straight plate 10' at the other end of a disk having a locking hole P ₂ in the center. shaku 2 and
A sub-protractor scale 3 having a locking hole P ₃ at the center is pivoted so as to be able to rotate concentrically around the locking holes P ₁ , P ₂ , P ₃ . As a result, the linear scale 1, the main scale 2, and the subscale 3 can each rotate freely about one point. The cross sections of the proximal ends 5 and 5' of the linear scale 1 and the main dividing scale 2 respectively form corresponding U-shaped grooves 5a, 5b and 5a', 5b', and convex cross sections 6,
The auxiliary scales 7, 7' forming a 6' are fitted into the linear scale 1 and the main protractor scale 2 along the respective U-shaped grooves. As a result, the auxiliary scales 7 and 7' have U-shaped grooves 5a, 5b and 5a', 5 corresponding to the respective linear scales and main fractional scales, respectively.
This means that it can be slid telescopically along b′.

When doctors, especially surgeons, measure the angles formed by various parts of the patient's body, such as the lower back and legs, the cervical vertebrae and the head,
By extending one or both of the linear scale and the auxiliary scale, the measurement base line 4 engraved in the center of the straight plate of the straight scale and main fraction scale is extended, and the measuring point This will ensure that the amount is clearly and correctly allocated.

A method of using the angle meter according to the embodiment having the above configuration will be explained using bending of the legs and waist as an example. First, use the straight scale for the legs and the principal scale for the waist.
The angle formed by it (referred to as θ ₁ ) can be measured by visually reading the numerical value that the pointer of the linear scale indicates on the main protractor scale. If the angle θ ₁ at this time is, for example, 120°, align the 0 of the subscale at that angle, and while maintaining that state, hold the subscale so that it does not move against the main scale. do. Next, when the subject (patient) extends or shortens the legs with the support of the doctor, the angle between the legs and the waist changes as a result. If we move only the linear scale and apply it to the leg, and if the angle θ ₂ between the waist and the leg is 100°, then the pointer of the linear scale will be the principal fraction as before. It can be measured from the numerical value indicating the angle scale, and at the same time, the numerical value indicating the scale of the sub-protractor scale of the pointer of the linear scale represents θ ₁ −θ ₂ =θ ₃ , that is, a deviation angle of 20°.

Similarly, the case of measuring the degree of bending of an arm will be explained based on FIGS. 6 to 8 (the figures are explanatory diagrams for measuring the degree of bending of a patient's arm undergoing rehabilitation treatment, etc.).

Place the horizontally extended linear scale 1 and the principal protractor scale 2 on the horizontally extended arm u. At this time, the linear scale 1
The pointer 8 points to 0 degrees (θ ₁ ) of the protractor disk 9 of the main protractor scale 2 (FIG. 6).

Next, the linear scale 1 and the principal scale 2 are bent so as to correspond to the slightly bent arm u, and are applied to the arm u. The angle at this time is read from the angle (θ ₂ ) of the protractor disk 9 of the main protractor scale 2.

Then, in preparation for the next bending of arm u, subscale 3
, and align the 0 degree scale of the subscale 3 with the pointer 8 of the linear scale 1 (FIG. 7).

In order to correspond to the arm u that is bent more deeply than the state shown in FIG. 7, the linear scale 1 and the principal scale 2 are bent and applied to the arm u. At this time, the bending angle of the arm u from the state shown in FIG. 6 can be determined by reading the scale on the protractor disk 9 of the main protractor scale 2. The bending angle (displacement angle θ ₃ ) of the arm u from the state shown in FIG. 7 is the subscale 3
All you have to do is read the scale.

In addition, the length of each part of the body can be measured using a linear scale, the linear part of the main scale, and a length scale written on the auxiliary scale.

As described above, in the present invention, since the deviation angle θ ₃ can be measured continuously from θ ₁ and θ ₂ , it is also possible to conversely find θ ₁ from the increase/decrease angle (deviation angle: θ ₃ ). That is,
In addition to the above-mentioned use for doctors, for example, at a work site such as a factory, measure the angle of the attachment point with the angle meter of the present invention, bend the pipe to the angle (θ ₂ ), and then calculate the angle ( θ ₃ ), align the linear scale and main fractional scale with the pipe angle θ ₂ , hold the linear scale and main fractional scale, and align the sub-gradient scale 0 position with the position of the linear scale pointer. While holding the main and sub-gradient scales, adjust the linear scale to the position where the desired angle (θ ₃ ) is obtained. The next angle between the linear scale and the principal scale at that time becomes the changed angle θ ₁ (θ ₂ −θ ₃ =θ ₁ ).

<Effects of the invention> As described above, the invention of the present application has the following effects.

When measuring consecutive angles, the deviation angle between the second and subsequent angles and the previous angle can be visually read at a glance or continuously by rotating the sub-protractor scale. can. This means that surgeons and
This provides convenience to medical professionals such as orthopedic surgeons.

When the deviation angle is known, the angle can be easily corrected by reverse rotation of the subscale, which can contribute to improving work efficiency at production sites such as factories.

Always from 0° to 180° depending on the scale of the sub-protractor scale.
Furthermore, the angle of the entire circumference can be measured by rotating the sub-protractor scale.

It is portable because it has an auxiliary scale that can be extended and slid.

Thermoplastics such as polymethyl methacrylate, polystyrene, polyvinyl chloride, and polyester can be selected as the material, so they have translucency and can be easily colored. Therefore, it is easy to visually read the written lines and numbers, and it is also possible to separate and color them individually, and the manufacturing process is also easy.

As described above, although the present invention has a simple structure, it has many effects, and its inventive step is significant.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing the medical goniometer according to the present invention, Fig. 2 is an enlarged sectional view of the linear scale base A-A' in Fig. 1, and Figs. 3 and 4 are the auxiliary scales in Fig. 1. FIG. 5 is an enlarged cross-sectional view of the sliding portions B-B' and D-D', and FIG. FIG. 8 is an explanatory diagram for measuring the degree of bending of a patient's arm. Drawing symbols: 1... Linear scale, 2... Principal minute scale,
3... Subdivision scale, 4... Base line, 5... Main fraction scale base end, 5'... Straight scale base end, 5a, 5b... Straight scale wedge-shaped groove, 5a', 5b' ...principal scale square groove,
6, 6'... Cross section of auxiliary scale, 7, 7'... auxiliary scale,
P ₁ ……Line scale locking hole, P ₂ ……Main scale locking hole,
P ₃ ...Auxiliary protractor locking hole, 8...Pointer, 9...
Protractor disk, 10,10... straight plate.

Claims (1)

[Claims for Utility Model Registration] 1. A straight ruler 1 consisting of a straight plate 10 with a pointer 8 at one end having a locking hole _P1 , and a locking hole in the center.
P ₂ and a straight plate 1 at the other end of the protractor disk 9.
0', and a sub-scale scale 3 consisting of a semi-circular plate with a locking hole _P2 in the center, while both straight plates 10, 10' are capable of sliding expansion and contraction. An auxiliary scale 7, 7' is provided on either or both of the linear scale 1 and the main fractional scale 2, and a base line 4 is provided at the center of both the linear plates 10, 10' and the auxiliary scales 7, 7', The above locking holes P ₁ , P ₂ , P ₃
A locking tool is inserted and fixed to the linear scale 1, the main scale 2, and the subscale 3 to be freely rotatable, and to be freely extendable and retractable by the auxiliary scales 7 and 7'. A medical angle meter featuring: 2. Any one or more of the linear scale 1, the main scale 2, the subscale 3, and the auxiliary scales 7 and 7' are made of polymethyl methacrylate, polystyrene, polyvinyl chloride, polyester, etc. The medical goniometer according to claim 1, wherein the medical goniometer is made of a colored plastic material selected from the following.