CN111419180A

CN111419180A - Mechanical pain measuring instrument

Info

Publication number: CN111419180A
Application number: CN202010218547.4A
Authority: CN
Inventors: 周鸿锁; 张艳洁; 董默; 赵祥坤; 周志尊
Original assignee: Mudanjiang Medical University
Current assignee: Mudanjiang Medical University
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2020-07-17
Anticipated expiration: 2040-03-25
Also published as: CN111419180B

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 at the position of the threads is provided with a retaining ring, a push rod penetrating through the bottom of the shell is movably arranged in the shell, the surface of the push rod, positioned 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 positioned in the shell is fixedly provided with a measuring needle mounting plate, the measuring needle mounting plate is provided with a needle rod penetrating through the retaining ring, the push rod between the measuring needle mounting plate and the bottom end of the shell is provided with three nonadjacent piston plates, the inner wall of the shell between two piston plates closest to the measuring needle mounting plate is fixedly provided with a damping plate, the damping plate is provided with a communication hole, and a first spring is arranged between the, the pain measuring instrument overcomes the defects of the prior art, so that the measuring result of the pain measuring instrument is stable, the error is reduced, and the use is more convenient.

Description

Mechanical pain measuring instrument

Technical Field

The invention relates to the technical field of pain measuring devices, and particularly belongs to a mechanical pain measuring instrument.

Background

Pain is a sensation of injury or paresthesia of an animal substrate, the degree of pain generally cannot be intuitively obtained, and currently is mainly measured by a pain sensation testing device.

The existing measuring devices are mainly classified into mechanical and electronic measuring devices. The electronic pain measuring instrument is convenient to use and rapid in measurement, but measurement data are inaccurate due to the fact that measurement results are affected by the humidity and the temperature of a measuring environment, the electronic pain measuring instrument is high in price, and the electronic pain measuring instrument is easy to damage during use. The mechanical pain measuring instrument has the advantages of convenience in carrying and good durability, but the needle body needs to be manually pushed in the pain measuring process, and the measurement error is larger due to the difference of unstable stress in the needle body movement process caused by manual pushing of the needle body; chinese invention patent, patent number: CN201510656872.8 discloses a portable mechanical pain sensitivity measuring device, which uses a spring as a force-bearing member, and applies pressure to the measured animal through the elastic force of the spring, but because the elastic force of the spring is related to the compressed length, the spring acts instantaneously when recovering deformation, and the difference of the externally applied elastic force at each stage is large, and the problem of unstable stress during the movement of the needle body still exists.

Disclosure of Invention

The invention aims to provide a mechanical pain measuring instrument, which can enable a needle body to move slowly and reduce the problem of unstable stress in the movement process of the needle body.

In order to solve the problems, the technical scheme adopted by the invention is as follows:

a mechanical pain measuring instrument comprises a shell, wherein the shell is a cylinder with an opening at the top, the inner wall of the upper part of the shell is provided with threads, the inner wall of the shell at the position of the threads is provided with a retainer 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 push rod positioned outside the shell and the piston plate closest to the push rod is provided with scales, a measuring needle mounting plate is fixedly arranged at the top end of the push rod positioned in the shell, a needle rod penetrating through the check ring is arranged on the measuring needle mounting plate, three nonadjacent piston plates are arranged on the push rod between the measuring needle mounting plate and the bottom end of the shell, wherein a damping plate is fixedly arranged on the inner wall of the shell between the two piston plates which are closest to the measuring needle mounting plate, the damping plate is provided with a communicating hole, and a first spring is arranged between the piston plate closest to the bottom of the shell and the bottom of the shell.

Further, the bottom of shell install the button shell, the button shell in install button and second spring, the button include contact, fixture block and button body, the button body be "mouth" font, the contact set up on the outer terminal surface of button body, the fixture block set up on the inner terminal surface of the button body of the relative one side of contact, second spring mounting on the outer terminal surface of the button body of fixture block department, the scale on be equipped with the fixed slot that a plurality of can insert the fixture block.

Furthermore, an adjusting groove is arranged on the retainer ring.

Further, the length of the needle rod is smaller than the height of the threads on the inner wall of the shell.

Furthermore, the end surfaces of the piston plate and the measuring pin mounting plate, which are contacted with the inner wall of the shell, are provided with rubber rings.

Furthermore, damping media are filled between the damping plate and the piston plates on the two sides of the damping plate, and the sum of the distances between the damping plate and the piston plates on the two sides of the damping plate is not less than twice of the height of the threads on the inner wall of the shell.

Compared with the prior art, the invention has the following implementation effects: the shell of the pain measuring instrument provides power for the push rod to move upwards through the first spring, and the damping plate and the damping medium are arranged in the shell, so that the instantaneous impact force generated by the first spring to the push rod is counteracted, the push rod can slowly move upwards under the flowing of the damping medium on two sides of the damping plate, and meanwhile, the power generated by the spring at each stage when the push rod moves is stabilized, so that the measuring result of the pain measuring instrument is stabilized, and the error is reduced; in addition, the button shell that sets up on the shell is used for controlling the motion of push rod, and the reading of the test result of being convenient for has improved the precision that the test result read, and makes this pain measuring instrument use more convenient.

Drawings

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

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

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a front view of the damping plate.

Fig. 5 is a front view of the retainer ring.

Fig. 6 is a schematic view of the structure of the push rod with the piston plate mounted.

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

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation to be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1-5, the mechanical pain measuring instrument comprises a housing 1, the housing 1 is a cylinder with an open top, the inner wall of the upper part of the housing 1 is provided with a thread 12, a retaining ring 8 is mounted on the inner wall of the housing 1 where the thread 12 is arranged, an adjusting groove 81 is arranged on the retaining ring 8, and the position of the retaining ring 8 on the inner wall of the housing 1 can be adjusted by inserting a tool into the adjusting groove 81 to rotate the retaining ring 8. Movable mounting has the push rod 4 that passes the shell 1 bottom in the shell 1, be located the 4 top fixed mounting of push rod outside the shell 1 and have handle 41, pulling push rod 4 during convenient operation, and be located 4 top fixed mounting of push rod inside the shell 1 and have a survey needle mounting panel 7, install the needle bar 9 that passes retaining ring 8 on the survey needle mounting panel 7, the length of needle bar 9 is less than the height of screw thread 12 on the shell 1 inner wall, install three nonadjacent piston plate 5 on the push rod 4 between survey needle mounting panel 7 and the shell 1 bottom, wherein push rod 4 is located the top of shell 1 outside and is equipped with scale 42 to the push rod 4 surface between the nearest piston plate 5 rather than apart from, can confirm the distance that needle bar 9 removed through scale 42.

The first spring 10 is installed between the piston plate 5 closest to the bottom of the shell 1 and used for providing upward moving power for the push rod 4, the damping plate 6 is fixedly installed on the inner wall of the shell 1 between the two piston plates 5 closest to the probe mounting plate 7, the communication hole 61 is formed in the damping plate 6, damping media 13 are filled between the damping plate 6 and the piston plates 5 on the two sides of the damping plate 6, the damping media 13 can be liquid water or oil or air serving as the damping media 13, and in the moving process of the push rod 4, the damping media 13 on the two sides of the damping plate 6 move back and forth through the communication hole 61 to offset the instantaneous impact force generated by the first spring 10 on the push rod 4, so that the push rod 4 can move slowly.

The sum of the distances between the damping plate 6 and the piston plates 5 on both sides thereof is equal to twice the height of the threads 12 on the inner wall of the housing 1, so as not to prevent the needle bar 9 from protruding from the top of the housing 1, and rubber rings 51 are installed on the end surfaces of the piston plates 5 and the needle mounting plate 7 contacting the inner wall of the housing 1 to prevent the damping medium 13 from leaking.

Example 2

As shown in fig. 1 to 7, on the basis of embodiment 1, a button housing 2 is further screwed to the bottom of the housing 1, a button 3 and a second spring 11 are installed in the button housing 2, the button 3 includes a contact 31, a latch 33 and a button body 32, the button body 32 is shaped like a Chinese character 'kou', the contact 31 is installed on an outer end surface of the button body 32, the latch 33 is installed on an inner end surface of the button body 32 on the opposite side of the contact 31, the second spring 11 is installed on an outer end surface of the button body 32 at the latch 33, the second spring 11 pushes a part of the contact 31 of the button 3 out of the button housing 2, a plurality of fixing grooves 40 capable of being inserted into the latch 33 are provided on the scale 42, and after the latch 33 is inserted into the fixing grooves 40, the push rod 4 can be locked, so.

When the pain measuring instrument is used, firstly, a tool is used for adjusting the retainer ring 8 to a proper position, the needle rod 9 extends out of the top of the shell 1, then the contact 31 is pressed, the fixture block 33 is moved out of the fixed groove 40, then the handle 41 of the push rod 4 is held, the push rod 4 is pulled down to a proper position, the contact 31 is released, the fixture block 33 is inserted into the fixed groove 40, and the scale value X at the moment is recorded by taking the surface of the button shell 2 as a reference; then the needle rod 9 of the device is aligned with the sole of the white rat, the position of the pain measuring instrument is kept still, the contact 31 is pressed, the clamping block 33 is moved out of the fixed groove 40, the push rod 4 is pushed by the first spring 10, the needle rod 9 slowly moves towards the sole of the white rat under the obstruction of the damping plate 6 and the damping medium 13, the contact 31 is released at the moment when the white rat suddenly lifts the foot, the clamping block 33 is inserted into the fixed groove 40, the pain measuring instrument is taken out, the scale value Y at the moment is recorded, the difference value between X and Y is calculated to obtain a pain threshold, the handle 41 is pulled by the spring tensiometer, the tension value when the Y position of the push rod 4 is positioned on the surface of the button shell 2 is measured, and the pain threshold is obtained.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a machinery pain measuring instrument, includes the shell, the shell be open-topped drum, its characterized in that: the upper portion inner wall of shell be equipped with the screw thread, the shell inner wall that is equipped with screw thread department installs the retaining ring, shell in movable mounting have the push rod that passes the shell bottom, the push rod be located the outside top of shell and to rather than the push rod surface between the nearest piston plate of distance be equipped with the scale, the push rod top fixed mounting who is located the shell has the measuring stylus mounting panel, the measuring stylus mounting panel on install the needle bar that passes the retaining ring, measuring stylus mounting panel and shell bottom between the push rod on install three not adjacent piston plate, wherein from the measuring stylus mounting panel apart from the nearest on the shell inner wall between two piston plates fixed mounting have the damping plate, the damping plate on be equipped with the intercommunicating pore, install first spring between shell bottom apart from the nearest piston plate of shell bottom and the shell bottom.

2. The mechanical pain measuring instrument of claim 1, wherein: the bottom of shell install the button shell, the button shell in install button and second spring, the button include contact, fixture block and button body, the button body be "mouth" font, the contact set up on the outer terminal surface of button body, the fixture block set up on the inner terminal surface of the button body of the relative one side of contact, second spring mounting on the outer terminal surface of the button body of fixture block department, the scale on be equipped with the fixed slot that a plurality of can insert the fixture block.

3. The mechanical pain measuring instrument of claim 1, wherein: the retainer ring is provided with an adjusting groove.

4. The mechanical pain measuring instrument of claim 1, wherein: the length of the needle rod is smaller than the height of the thread on the inner wall of the shell.

5. The mechanical pain measuring instrument of claim 1, wherein: and rubber rings are arranged on the end surfaces of the piston plate and the measuring pin mounting plate, which are in contact with the inner wall of the shell.

6. The mechanical pain measuring instrument of claim 1, wherein: damping media are filled between the damping plate and the piston plates on the two sides of the damping plate, and the sum of the distances between the damping plate and the piston plates on the two sides of the damping plate is not less than twice of the height of the threads on the inner wall of the shell.