CN111419180B - A mechanical pain measuring device - Google Patents

Abstract

The invention discloses a mechanical pain measuring instrument, which comprises a shell, wherein the inner wall of the upper part of the shell is provided with threads, the inner wall of the shell, which is provided with threads, is provided with a check ring, a push rod penetrating through the bottom of the shell is movably arranged in the shell, the surface of the push rod between the top end of the outer part of the shell and a piston plate closest to the push rod is provided with scales, the top end of the push rod in the shell is fixedly provided with a needle mounting plate, the needle mounting plate is provided with a needle rod penetrating through the check ring, the push rod between the needle mounting plate and the bottom end of the shell is provided with three non-adjacent piston plates, wherein the inner wall of the shell, which is closest to the needle mounting plate, is fixedly provided with a damping plate, and a communication hole is arranged on the damping plate, and a first spring is arranged between the piston plate closest to the bottom of the shell and the bottom of the shell.

Description

A mechanical pain measuring device

technical field

The invention relates to the technical field of pain measuring devices, in particular to a mechanical pain measuring instrument.

Background technique

Pain is a kind of sensation caused by damage or paresthesia in the animal substrate. The degree of pain cannot be obtained intuitively. At present, it is mainly measured by pain testing devices.

Existing measuring devices are mainly divided into mechanical and electronic measuring devices. Electronic pain measuring instruments are easy to use and quick to measure, but because the measurement results are affected by the humidity and temperature of the measurement environment, the measurement data is inaccurate, and the price of electronic pain measuring instruments is relatively high, and it is prone to damage during use. The mechanical pain measuring instrument has the advantages of easy portability and good durability, but it needs to manually push the needle body during the pain measurement process. Due to the manual push of the needle body, the difference in force during the movement of the needle body is unstable, resulting in measurement errors. Larger; China's invention patent, patent number: CN201510656872.8, discloses a portable mechanical pain sensitivity tester, which uses a spring as a force-bearing member, and exerts pressure on the tested animal through the elastic force of the spring, but Since the elastic force of the spring is related to its compressed length, the action is instantaneous when the deformation is restored, and the elastic force applied to the outside at each stage varies greatly, and there is still the problem of unstable force during the movement of the needle body.

Contents of the invention

The purpose of the present invention is to provide a mechanical pain measuring instrument, which enables the needle body to move slowly and reduces the problem of unstable force during the movement of the needle body.

In order to solve the above problems, the technical scheme adopted in the present invention is as follows:

A mechanical pain measuring instrument, comprising a shell, the shell is a cylinder with an open top, the upper inner wall of the shell is provided with threads, and the inner wall of the shell where the thread is provided is equipped with a retaining ring, and the inner wall of the shell is movable A push rod passing through the bottom of the casing is installed, and the surface of the push rod between the top outside the casing and the nearest piston plate is provided with a scale, and the top of the push rod inside the casing is fixedly installed with a stylus. The needle rod passing through the retaining ring is installed on the stylus mounting plate, and three non-adjacent piston plates are installed on the push rod between the stylus mounting plate and the bottom end of the housing, among which A damping plate is fixedly installed on the inner wall of the housing between the two piston plates closest to the needle mounting plate. The damping plate is provided with a communication hole, and a first piston plate is installed between the piston plate closest to the bottom of the housing and the bottom of the housing spring.

Further, a button case is installed on the bottom of the housing, and a button and a second spring are installed inside the button case. The button includes a contact, a block and a button body, and the button body is a "mouth". font, the contact is set on the outer end surface of the button body, the block is set on the inner end surface of the button body on the opposite side of the contact, and the second spring is installed on the button body at the block On the outer end face, the scale is provided with a number of fixing grooves into which blocks can be inserted.

Further, the retaining ring is provided with an adjustment groove.

Further, the length of the needle bar is less than the height of the threads on the inner wall of the casing.

Further, rubber rings are installed on the end faces of the piston plate and the probe mounting plate that are in contact with the inner wall of the casing.

Further, the damping medium is filled between the damping plate and the piston plates on both sides, and the sum of the distances between the damping plate and the piston plates on both sides is not less than twice the thread height on the inner wall of the casing.

Compared with the prior art, the present invention has the following effects: in the housing of the present invention, the first spring provides power for the upward movement of the push rod, and the damping plate and damping medium are installed in the housing, so that the first spring provides power to the push rod. The instantaneous impact force generated is offset, and under the flow of the damping medium on both sides of the damping plate, the push rod can move upwards slowly, and at the same time, the power generated by the spring against the push rod at each stage is stabilized, so that the pain measured by the analgesia instrument The result is stable and the error is reduced; in addition, the button shell provided on the shell is used to control the movement of the push rod, which is convenient for reading the test result, improves the accuracy of the test result reading, and makes the pain measuring instrument more convenient to use.

Description of drawings

Fig. 1 is the front view of the present invention.

Fig. 2 is a structural schematic diagram of the present invention.

FIG. 3 is an enlarged view of A in FIG. 2 .

Figure 4 is a front view of the damping plate.

Figure 5 is a front view of the retaining ring.

Fig. 6 is a structural schematic diagram of a push rod installed with a piston plate.

Fig. 7 is a structural schematic diagram of the button.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation and be configured in a specific orientation. and operation, and therefore should not be construed as limiting the invention.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Example 1

As shown in Figure 1-5, the mechanical pain measuring instrument includes a casing 1, which is a cylinder with an open top, and the upper inner wall of the casing 1 is provided with a thread 12, and a retaining ring is installed on the inner wall of the casing 1 where the thread 12 is provided. 8. An adjusting groove 81 is provided on the retaining ring 8 , and the retaining ring 8 can be rotated by inserting a tool into the adjusting groove 81 to adjust the position of the retaining ring 8 on the inner wall of the housing 1 . A push rod 4 passing through the bottom of the housing 1 is movable installed inside the housing 1, and a handle 41 is fixedly installed on the top of the push rod 4 outside the housing 1, which is convenient for pulling the push rod 4 during operation, while the top of the push rod 4 inside the housing 1 is fixed A stylus mounting plate 7 is installed, and a needle bar 9 passing through the retaining ring 8 is installed on the stylus mounting plate 7. The length of the needle bar 9 is less than the height of the thread 12 on the inner wall of the housing 1. Three non-adjacent piston plates 5 are installed on the push rod 4 between the ends, wherein the push rod 4 is located at the top of the outer shell 1 to the surface of the push rod 4 between the piston plate 5 closest to the distance. The scale 42 can determine the distance that the needle bar 9 moves.

A first spring 10 is installed between the piston plate 5 closest to the bottom of the housing 1 and the bottom of the housing 1 to provide power for the push rod 4 to move upwards, and the two piston plates 5 closest to the probe mounting plate 7 A damping plate 6 is fixedly installed on the inner wall of the housing 1 between them, and a communication hole 61 is arranged on the damping plate 6. A damping medium 13 is filled between the damping plate 6 and the piston plates 5 on both sides. The damping medium 13 can be liquid water or Oil or air can also be used as the damping medium 13. During the movement of the push rod 4, the damping medium 13 on both sides of the damping plate 6 moves back and forth through the communication hole 61 to offset the instantaneous impact of the first spring 10 on the push rod 4 Force, make push rod 4 can move slowly.

The sum of the distances between the damping plate 6 and the piston plates 5 on both sides is equal to twice the height of the thread 12 on the inner wall of the casing 1, which does not prevent the needle rod 9 from protruding from the top of the casing 1, and the piston plate 5 and the stylus mounting plate 7 and A rubber ring 51 is installed on the end surface where the inner wall of the housing 1 contacts to prevent the damping medium 13 from leaking.

Example 2

As shown in Figures 1-7, on the basis of Embodiment 1, the bottom of the housing 1 is also screwed with a button case 2, and a button 3 and a second spring 11 are installed in the button case 2, and the button 3 includes a contact 31, a card Block 33 and button body 32, button body 32 is " mouth " shape, contact 31 is arranged on the outer end surface of button body 32, and block 33 is arranged on the inner end surface of button body 32 on the opposite side of contact 31, the second The second spring 11 is installed on the outer end surface of the button body 32 at the block 33, the second spring 11 pushes the part of the contact 31 of the button 3 out of the button housing 2, and the scale 42 is provided with several fixing grooves that can be inserted into the block 33 40. After the clamping block 33 is inserted into the fixing groove 40, the push rod 4 can be clamped to stop the push rod 4 from moving.

When the pain measuring instrument is in use, first use a tool to adjust the retaining ring 8 to a suitable position so that the needle bar 9 protrudes from the top of the housing 1, then press the contact 31 to move the block 33 out of the fixing groove 40, Then hold the handle 41 of the push rod 4 and pull down the push rod 4 to an appropriate position, release the contact 31, insert the block 33 into the fixing groove 40, and record the scale value X at this time with the surface of the button case 2 as a reference Then the pin bar 9 of this device is aimed at the sole of the white mouse, keeps the position of the pain measuring instrument motionless, presses the contact 31, makes the block 33 move out from the fixed groove 40, and the first spring 10 pushes the push rod 4 Push, under the resistance of the damping plate 6 and the damping medium 13, the needle bar 9 slowly moves to the sole of the mouse, at the moment when the mouse suddenly lifts the foot, the contact 31 is released, the block 33 is inserted into the fixing groove 40, and the mouse is taken out. Pain measuring instrument, record the scale value Y at this time, calculate the difference between X and Y to obtain the pain threshold, and pull the handle 41 through the spring tension meter, and measure the tension value when the Y position of the push rod 4 is located on the surface of the button shell 2, Get the pain threshold.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (5)

1. The utility model provides a mechanical pain measuring instrument, includes the shell, the shell be open-top's drum, its characterized in that: the upper inner wall of the shell is provided with threads, the inner wall of the shell provided with the threads is provided with a retainer ring, a push rod penetrating through the bottom of the shell is movably arranged in the shell, scales are arranged on the surface of the push rod between the top end of the outer part of the shell and a piston plate closest to the push rod, a needle mounting plate is fixedly arranged at the top end of the push rod in the shell, a needle rod penetrating through the retainer ring is arranged on the needle mounting plate, three non-adjacent piston plates are arranged on the push rod between the needle mounting plate and the bottom end of the shell, a damping plate is fixedly arranged on the inner wall of the shell between the two piston plates closest to the needle mounting plate, a communication hole is arranged on the damping plate, and a first spring is arranged between the piston plate closest to the bottom of the shell and the bottom of the shell;

the button shell is installed to the bottom of shell, the button shell in install button and second spring, the button include contact, fixture block and button body, the button body be "mouthful" font, the contact set up on the outer terminal surface of the button body, the fixture block set up on the interior terminal surface of the button body of the opposite one side of contact, the second spring install on the outer terminal surface of the button body of fixture block department, the scale on be equipped with the fixed slot of a plurality of insertable fixture block.

2. A mechanical pain measurement instrument according to claim 1, wherein: the check ring is provided with an adjusting groove.

3. A mechanical pain measurement instrument according to claim 1, wherein: the length of the needle bar is smaller than the height of the threads on the inner wall of the shell.

4. A mechanical pain measurement instrument according to claim 1, wherein: and rubber rings are arranged on the end surfaces of the piston plate and the probe mounting plate, which are in contact with the inner wall of the shell.

5. A mechanical pain measurement instrument according to claim 1, wherein: damping medium is filled between the damping plates and the piston plates at two sides of the damping plates, and the sum of the distances between the damping plates and the piston plates at two sides of the damping plates is not less than twice of the height of threads on the inner wall of the shell.

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