CN211049375U - Muscle tension testing handle - Google Patents

Abstract

The utility model provides a muscle tension test handle, including main body cover, displacement detecting element, pressure deformation component, skin contact element and base component. The displacement detecting element is disposed within the main body case. The pressure deformation element is connected to the upper end of the displacement detection element. The skin contact member is attached to the lower end of the displacement sensing member. The base member is attached to the lower end of the main body case. Wherein the pressure-deformation element has a deformation amount in an axial direction of the main body housing relative to the displacement detection element upon application of a predetermined pressing force, the skin contact element outputs the predetermined pressing force to the muscle skin surface, and the displacement detection element has a relative displacement amount in the axial direction of the main body housing relative to the base element; the displacement detection element is provided with a circuit module which detects the deformation quantity and the relative displacement quantity, converts the deformation quantity and the relative displacement quantity into voltage signals and outputs the voltage signals. The utility model discloses measurement accuracy is high, and simple structure, convenient operation.

Description

Muscle tension testing handle

Technical Field

The utility model relates to a skin muscle tension measuring device specifically relates to a muscle tension test handle.

Background

Muscles are important components of human bodies, various physiological activities of human bodies need to be realized by participation of the muscles, and damage or diseases of the muscles can seriously affect normal lives of the human bodies. Muscle tension abnormality is a common manifestation of many nerve and muscle diseases, and muscle tension evaluation is important for making a treatment plan and evaluating treatment effect.

Muscle tone refers to the resistance felt by an active limb or by pressing against a muscle, resulting from the physical properties of the tissue, the elasticity within the muscle or connective tissue, reflex muscle contractions, and the like. Pathological changes on nerve-muscle reflex arcs, contracture of tendons, stiffness of joints and the like all affect the examination result of muscle tension, and the muscle tension detection is carried out in a warm environment and a comfortable position, so that a tested person can relax as much as possible.

The most common clinical method for evaluating muscle tone is to modify the Ashworth scale, which is simple and easy to implement, but the results are greatly influenced by the subjective condition of the testers. The isokinetic movement tester method can objectively and quantitatively evaluate the spasm, but cannot be widely applied clinically due to the complex operation and the large equipment. The muscle tension assessment is based on the pinching of the tested muscle, and the muscle tension is sensed by the experience and judgment of the tested muscle, and the method is also greatly influenced by the subjectivity of the tested person and has no uniform standard.

With the progress of the technology, new devices for detecting muscular tension have been developed, such as those named "a myotension measuring instrument" (publication No. CN 203776916U), "an upper limb myotension measuring device" (publication No. CN 104622848A), "a myotension detecting apparatus and system" (publication No. CN 204147049U), a myotension measuring device (publication No. CN 202426537U), "a myotension detection analyzing apparatus and detecting method" (publication No. CN 1077026 a), "a quantitative foot myotension detector" (publication No. CN 201710367U), a skin myotension measuring device (publication No. CN 102125436 a), a dystonia detector (publication No. CN 106974664 a), etc., which, although the accuracy of the myotension detection is improved and the subjectivity of the detection result is reduced, however, the prior art including the above-mentioned disclosures have some disadvantages. For example, the "upper limb muscle tension measuring device", the "foot muscle tension quantitative detector" and the "muscle tension detecting device and system" can only measure special parts such as limbs or feet, and have the disadvantages of insufficient measuring precision, complicated operation and inconvenient application; although improvements are made to a muscle tension measuring instrument, a muscle tension measuring device, a muscle tension detection and analysis device and a detection method, the measuring device is complex and high in cost, and the requirements on measuring personnel are high, and improvements are needed.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a muscle tension test handle, this muscle tension test handle's simple structure, the result precision is high, and is easy and simple to handle.

The utility model provides a pair of muscle tension test handle, including main body cover, displacement detecting element, pressure deformation component, skin contact element and base component. A displacement detecting element is disposed within the main body housing. The pressure deformation element is connected to the upper end of the displacement detection element. A skin contact element is attached to the lower end of the displacement sensing element. A base member is attached to a lower end of the main body housing. Wherein the pressure-deformation element has a deformation amount in the axial direction of the main body casing with respect to the displacement detection element upon application of a predetermined pressing force, the skin contact element outputs the predetermined pressing force to the muscle skin surface, and the displacement detection element has a relative displacement amount in the axial direction of the main body casing with respect to the base element; the displacement detection element is provided with a circuit module which detects the deformation amount and the relative displacement amount and converts the deformation amount and the relative displacement amount into voltage signals to be output.

Illustratively, the displacement detecting element includes a mounting post having an upper mounting surface, a lower mounting surface, a front mounting surface, a rear mounting surface, a left mounting surface, and a right mounting surface, the circuit module includes a first signal processing board, a second signal processing board, a first sensor, a second sensor, a light emitting strip, and a light signal receiving sheet, the first sensor and the second sensor are respectively disposed on the upper mounting surface and the lower mounting surface, the first signal processing board and the second signal processing board are respectively disposed on the front mounting surface and the rear mounting surface, and the light emitting strip and the light signal receiving sheet are respectively disposed on the left mounting surface and the right mounting surface.

Exemplarily, the mounting post is provided with an axial limiting groove extending upwards from the lower mounting surface of the mounting post, the main body housing is provided with a transverse through hole corresponding to the axial limiting groove, and the transverse through hole is connected with the axial limiting groove through a limiting pin.

Illustratively, the mounting post is provided with a first accommodating rail and a second accommodating rail, the first accommodating rail extends downwards from the upper mounting surface along the central axis of the mounting post, the second accommodating rail extends upwards from the lower mounting surface along the central axis of the mounting post, and the coaxiality tolerance of the first accommodating rail and the second accommodating rail is not more than 0.03 mm.

Illustratively, the pressure-deformation element includes:

the upper shell is fixedly connected to the upper end of the main body shell;

one end of the cylindrical rod is connected to the upper shell, and the other end of the cylindrical rod is connected with the first accommodating track in a sliding mode; and

and the force measuring spring is arranged between the upper shell and the mounting column and wound on the cylindrical rod.

Exemplarily, the skin contact element is connected to the lower end of the displacement detection element by the pressure transmission element.

Illustratively, the pressure transmission element is a hollow loop bar, and a guide groove is formed on the bar wall of the hollow loop bar and extends downwards from the upper end of the hollow loop bar.

Illustratively, the base element comprises:

a base having a through hole therethrough for the skin contacting element to pass through;

the sleeve is fixedly connected with the base and sleeved outside the hollow loop bar; and

one end of the limiting rod is fixedly connected with the sleeve, and the other end of the limiting rod is connected with the second accommodating track in a sliding manner;

one end of the limiting rod connected with the sleeve is further connected with a cross rod, and two ends of the cross rod are located in the guide grooves.

Illustratively, a return spring is arranged in the hollow loop bar, one end of the return spring is connected with the cross bar, and the other end of the return spring is connected with the skin contact element.

Illustratively, the skin contacting element comprises:

a circular skin contact body having a skin contacting face and a connecting face opposite the skin contacting face; and

the spring hanging column is convexly arranged on the connecting surface;

the reset spring is a tension spring, and one end of the tension spring is hung on the spring hanging column.

The utility model discloses a muscle tension test handle gathers simultaneously through the displacement detecting element who sets up in main body cover and is poor with the relevant dynamic displacement of pressing force, displacement, does not receive main body cover and base component's influence, and measurement accuracy is high, and simple structure, convenient operation.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail embodiments of the present invention with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the invention and not to limit the invention. In the drawings, like reference numbers generally represent like parts or steps.

Fig. 1 is a perspective view of a muscle tone test handle according to an embodiment of the present invention;

FIG. 2 is an exploded view of the muscle tone test handle shown in FIG. 1;

FIG. 3 is a top view of the muscle tone test handle of FIG. 1;

FIG. 4 is a sectional view A-A of FIG. 3;

FIG. 5 is a cross-sectional view B-B of FIG. 3;

fig. 6 is a block diagram of a circuit module of a displacement detection element of a muscle tension test handle according to an embodiment of the present invention.

Wherein the reference symbols are

100-muscle tension testing handle

110-Main body case

111-transverse through hole

112-limit pin

113-signal line outlet

120-displacement detecting element

121-mounting post

1201-positioning step

1202-threaded connection

1211 axial limiting groove

1212-first accommodation track

1213-second accommodating track

1214-upper mounting surface

1215-lower mounting face

1216-front mounting surface

1217 rear mounting surface

1218-left mounting surface

1219-right mounting surface

122-Circuit Module

1221 first Signal processing Board

1222-second Signal processing Board

1223-first sensor

1224 — second sensor

1225-Lighting Bar

1226-optical signal receiving sheet

130-pressure deformation element

131-upper shell

1311-mounting hole

1312-connecting screw

132-cylindrical rod

133-force measuring spring

140-skin contact element

141-circular skin contact body

1411 skin contact surface

1412 connecting surface

142-spring hanging column

150-base element

151-base

1511-through hole

152-sleeve

153-limiting rod

154-Cross Bar

160-pressure transfer element

161-guide groove

162-connecting thread segment

170-return spring

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the present invention and are not intended to limit the invention to the particular embodiments described herein. Based on the embodiments of the present invention described in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in fig. 1 to 6, the muscle tension test handle 100 of the present invention includes a main body case 110, a displacement detecting element 120, a pressure-varying element 130, a skin contact element 140, and a base element 150. The displacement detecting element 120 is disposed inside the main body case 110. The pressure-varying element 130 is attached to the upper end of the displacement sensing element 120. The skin contact member 140 is attached to the lower end of the displacement sensing member 120. The base member 150 is attached to the lower end of the main body case 110. Wherein the pressure-deformation element 130 has a deformation amount in the axial direction of the main body housing 110 with respect to the displacement detection element 120 at a predetermined pressing force, the skin contact element 140 outputs the predetermined pressing force to the muscle skin surface, and the displacement detection element 120 has a relative displacement amount in the axial direction of the main body housing 110 with respect to the base element 150; the displacement detecting element 120 has a circuit module 122 that detects the amount of deformation and the amount of relative displacement and converts the amount of deformation and the amount of relative displacement into a voltage signal to be output.

The utility model discloses when using, the user holds main body cover 110 and down slowly applys certain pressing force to muscle perpendicularly, this in-process, skin contact element 140 impresses toward the direction of muscle, displacement detection element 120 detects the displacement value of measuring the muscle production under pressure effect for the pressing force that the muscle was applyed simultaneously, and pressing force and displacement value are through displacement detection element collection and pressing force, the differential conversion of the relevant dynamic displacement of displacement value is voltage signal output, it does not receive main body cover 110 and base component 150's influence, measurement accuracy is high, and simple structure, and convenient operation.

The main body case 110 is mainly used for accommodating the displacement detecting element 120, in order to accommodate the displacement detecting element 120, the main body case 110 has an accommodating cavity, and a housing wall of the main body case 110 is provided with a signal line outlet 113 for a signal line of the displacement detecting element 120 to pass through.

Specifically, referring to fig. 2 and 6 in combination, the displacement detecting element 120 includes a mounting post 121, the mounting post 121 having an upper mounting surface 1214, a lower mounting surface 1215, a front mounting surface 1216, a rear mounting surface 1217, a left mounting surface 1218, and a right mounting surface 1219, the circuit module 122 including a first signal processing board 1221, a second signal processing board 1222, a first sensor 1223, a second sensor 1224, a light emitting strip 1225, and a light signal receiving sheet 1226, the first sensor 1223 and the second sensor 1224 being disposed on the upper mounting surface 1214 and the lower mounting surface 1215, respectively, the first signal processing board 1221 and the second signal processing board 1222 being disposed on the front mounting surface 1216 and the rear mounting surface 1217, respectively, the light emitting strip 1225 and the light signal receiving sheet 1226 being disposed on the left 1218 mounting surface and the right mounting surface 1219, respectively. The light emitting strip 1225 is used to provide a light source, the light signal receiving sheet 1226 receives a light signal emitted from the light emitting strip 1225, the first sensor 1223 and the second sensor 1224 may employ PSD position sensors, and the first signal processing board 1221 and the second signal processing board 1222 perform fluid pressure conversion, amplification, calculation, and output on the first sensor 1223 and the second sensor 1224, respectively. It should be understood that the circuit module 122 further has signal lines (not shown) for outputting the voltage signals processed by the first signal processing board 1221 and the second signal processing board 1222.

In the embodiment not shown, the first signal processing board 1221, the second signal processing board 1222, the first sensor 1223, the second sensor 1224, the light emitting bar 1225, and the light signal receiving sheet 1226 are not limited to this, and any board may be used as long as the board is mounted on the mounting post 121 and can acquire a dynamic displacement difference related to the pressing force and the displacement value.

The embodiment of the utility model provides an in, have on the erection column 121 and upwards extend the axial spacing groove 1211 from the lower mounting surface of erection column 121, have on the main body cover 110 with the horizontal through hole 111 that axial spacing groove 1211 corresponds, be connected through spacer pin 112 between horizontal through hole 111 and the axial spacing groove 1211. Relative rotation between the mounting post 121 and the main body housing 110 is not possible in the circumferential direction but relative axial movement is possible based on the engagement of the stopper pin 112 with the axial stopper groove 1211.

The utility model discloses an in the embodiment, still be provided with first holding track 1212 and second holding track 1213 on the erection column 121, first holding track 1212 follows last installation face 1214 and extends downwards along the axis of erection column 121, and second holding track 1213 upwards extends along the axis of erection column 121 from lower installation face 1215, and the axiality tolerance of first holding track 1212 and second holding track 1213 is not more than 0.03 mm. It is easily conceived that the first receiving rail 1212 and the second receiving rail 1213 cannot pass through for the purpose of receiving.

In the embodiment of the present invention, the pressure deformation element 130 includes an upper housing 131, a cylindrical rod 132 and a force measuring spring 133. The upper case 131 is fixedly coupled to an upper end of the main body case 110, and specifically, the upper case 131 has a mounting hole 1311, and a coupling screw 1312 is fixed to the main body case 110 through the mounting hole 1311, that is, the upper case 131 is fixedly coupled to the main body case 110 by the coupling screw 1312. One end of the cylindrical rod 132 is connected to the upper housing 131, and the other end is slidably connected to the first receiving rail 1312, and a clearance fit may be formed between the cylindrical rod 132 and the first receiving rail 1312, so that the cylindrical rod 132 can axially slide on the first receiving rail 1312. The force measuring spring 133 is arranged between the upper housing 131 and the mounting column 121 and wound on the cylindrical rod 132, specifically, the mounting column 121 is provided with a positioning step 1201, the force measuring spring 133 is a compression spring, and the compression spring is arranged between the lower end surface of the upper housing 131 and the positioning step 1201, so that the upper end of the force measuring spring 133 can move axially along with the cylindrical rod 132, and the movement amount of the force measuring spring 133 in the radial direction can be almost ignored.

In an embodiment of the present invention, the skin contact element 140 is connected to the lower end of the displacement detecting element 120 via a pressure transmitting element 160. Specifically, the pressure transmission element 160 is a hollow sleeve rod, the hollow sleeve rod is fixedly connected with the mounting column 121, in order to realize the fixed connection between the hollow sleeve and the mounting column 121, the hollow sleeve rod is provided with a connecting threaded section 162, the lower end of the mounting column 121 is provided with a threaded connection part 1202, and the connecting threaded section 162 is in threaded connection with the threaded connection part 1202; the rod wall of the hollow loop bar is also provided with a guide groove 161, and the guide groove 161 extends downwards from the upper end of the hollow loop bar. The pressure transfer element 160 functions not only to transfer a pressing force to the skin contact element 140 but also to provide a limit to the relative movement between the displacement sensing element 120 and the base element 150.

In an embodiment of the present invention, the base element 150 includes a base 151, a sleeve 152, and a stop lever 153. The base 151 is provided with a through hole 1511 for the skin contact element 140 to pass through, the sleeve 152 is fixedly connected with the base 151, the sleeve 152 is sleeved outside the hollow loop bar, one end of the limiting rod 153 is fixedly connected with the sleeve 152 through a connecting screw, and the other end is slidably connected with the second accommodating track 1213, specifically, the main body shell 110 is sleeved outside the sleeve 152 and can slide up and down relative to the sleeve 152; the end of the limiting rod 153 connected with the sleeve 152 can be connected with a cross rod 154, two ends of the cross rod 154 are located in the guide grooves 161, the cross rod 154 is fixedly connected with the sleeve 152 through a connecting screw, and one end of the limiting rod 153, which is far away from the cross rod 154, forms clearance fit with the second accommodating rail 1213, so that when a preset pressing force acts, the mounting column 121 moves downwards along with the axial direction of the main body shell 110, and the limiting rod 153 and the mounting column 121 generate relative displacement change. Illustratively, the base 151 may be a plexiglass ring that may be secured with the sleeve 152 by an interference fit.

In the embodiment of the present invention, a return spring 170 is disposed in the hollow rod, one end of the return spring 170 is connected to the cross rod 154, and the other end is connected to the skin contact element 140.

In an embodiment of the present invention, the skin contact element 140 includes a circular skin contact body 141 and a spring hanging column 142, the circular skin contact body 141 has a skin contact surface 1411 and a connection surface 1412 opposite to the skin contact surface 1411; the spring hanging columns 142 are arranged on the connecting surface 1412 in a protruding mode. The return spring 170 is a tension spring, one end of the tension spring 170 is hung on the spring hanging column 142, and the other end is hung on the cross bar 154. When the preset pressing force acts, the mounting column 121 moves axially downwards to drive the pressure transmission element 160 and further drive the skin contact element 140, so that the circular skin contact body 141 is pressed in the direction of muscles, and due to the arrangement of the circular skin contact body 141, the circular skin contact body 141 is in surface contact with the skin, and compared with a measuring head in point contact, the measuring head is less affected by the surface state of the skin, the stress consistency of a measuring surface can be better ensured, and the measuring precision is improved.

When the utility model is used, a user holds the main body shell 110 and slowly applies a certain pressing force to muscles vertically downwards, in the process, the mounting column 121 moves downwards axially to drive the pressure transmission element 160 and further drive the skin contact element 140, so that the circular skin contact body 141 is pressed in towards the muscles, and simultaneously the applied pressing force is transmitted to the force measuring spring 133 through the pressure transmission element 160 and the mounting column 121, at this time, one of the signal processing boards and one sensor (such as the first sensor 1223 and the first signal processing board 1221) of the circuit module 122 senses the relative displacement change (the relative displacement change corresponds to the deformation of the force measuring spring 133, the pressure value born by the force measuring spring 133 can be obtained through the deformation of the force measuring spring 133, namely, the force in the 'force-displacement' in the following text) and is converted into a voltage signal output, so that the subsequent element (which is not introduced in the present application) converts the real-time voltage analog signal into a digital signal and intercepts the measured effective voltage signal data according to a pre-calibrated data range; meanwhile, the base 151 is still fixed on the skin surface and remains stationary, so that an axial relative movement is generated between the sleeve 152 and the limiting rod 153 and the mounting post 121, one of the signal processing boards and one of the sensors (such as the second sensor 1224 and the second signal processing board 1222) of the circuit module 122 senses the relative displacement change (which can be referred to as "displacement" in "force-displacement" hereinafter) between the limiting rod 153 and the mounting post 121 and converts the relative displacement change into a voltage signal output, so that the subsequent element converts the real-time voltage analog signal into a digital signal and intercepts the effective voltage signal data of the measurement according to a data range calibrated in advance; the subsequent element processes the collected 'force-displacement' signal of the muscle, transmits the signal to a PC computer through serial port communication, and generates a 'force-displacement' curve of the muscle and a related data document after the signal is processed by built-in software. When a data test is completed, the muscle tension test handle 100 is slightly lifted, the skin contact element 140 is separated from the skin surface, the base 151, the sleeve 152 and the limiting rod 153 are restored to the initial state under the action of gravity and the return spring 170, and the guide groove 161 can play a role in guiding and limiting during the restoration process.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "upper, lower", "front, rear" and "left, right" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention.

The above description is only for the specific embodiments of the present invention or the description of the specific embodiments, the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A muscle tone testing handle, comprising:

a main body housing;

a displacement detection element disposed within the main body housing;

a pressure deformation element connected to an upper end of the displacement detecting element;

a skin contact member connected to a lower end of the displacement detecting member; and

a base member connected to a lower end of the main body case;

wherein the pressure-deformation element has a deformation amount in the axial direction of the main body casing with respect to the displacement detection element upon application of a predetermined pressing force, the skin contact element outputs the predetermined pressing force to the muscle skin surface, and the displacement detection element has a relative displacement amount in the axial direction of the main body casing with respect to the base element; the displacement detection element is provided with a circuit module which detects the deformation amount and the relative displacement amount and converts the deformation amount and the relative displacement amount into voltage signals to be output.

2. The muscle tension testing handle according to claim 1, wherein the displacement detecting member includes a mounting post having an upper mounting surface, a lower mounting surface, a front mounting surface, a rear mounting surface, a left mounting surface, and a right mounting surface, the circuit module includes a first signal processing board, a second signal processing board, a first sensor, a second sensor, a light emitting strip, and a light signal receiving piece, the first sensor and the second sensor are respectively provided on the upper mounting surface and the lower mounting surface, the first signal processing board and the second signal processing board are respectively provided on the front mounting surface and the rear mounting surface, and the light emitting strip and the light signal receiving piece are respectively provided on the left mounting surface and the right mounting surface.

3. The muscle tension test handle according to claim 2, wherein the mounting post has an axial limiting groove extending upward from a lower mounting surface of the mounting post, the main body housing has a transverse through hole corresponding to the axial limiting groove, and the transverse through hole is connected to the axial limiting groove by a limiting pin.

4. The muscle tensioning test handle according to claim 2, wherein the mounting post is provided with a first receiving track and a second receiving track, the first receiving track extending downwardly from the upper mounting surface along the central axis of the mounting post, the second receiving track extending upwardly from the lower mounting surface along the central axis of the mounting post, and the first receiving track and the second receiving track having a tolerance of coaxiality of no greater than 0.03 mm.

5. The muscle tone test handle of claim 4, wherein the pressure-deforming member comprises:

the upper shell is fixedly connected to the upper end of the main body shell;

one end of the cylindrical rod is connected to the upper shell, and the other end of the cylindrical rod is connected with the first accommodating track in a sliding mode; and

and the force measuring spring is arranged between the upper shell and the mounting column and wound on the cylindrical rod.

6. The muscle tension test handle according to claim 4 or 5, further comprising a pressure transmission element, wherein the skin contact element is connected to a lower end of the displacement detection element via the pressure transmission element.

7. The muscle tensioning test handle according to claim 6, wherein the pressure transmitting element is a hollow stem having a guide slot formed in a wall of the stem, the guide slot extending downwardly from an upper end of the stem.

8. The muscle tone test handle of claim 7, wherein the base member comprises:

a base having a through hole therethrough for the skin contacting element to pass through;

the sleeve is fixedly connected with the base and sleeved outside the hollow loop bar; and

one end of the limiting rod is fixedly connected with the sleeve, and the other end of the limiting rod is connected with the second accommodating track in a sliding manner;

one end of the limiting rod connected with the sleeve is further connected with a cross rod, and two ends of the cross rod are located in the guide grooves.

9. The muscle tension test handle according to claim 8, wherein a return spring is provided in the hollow stem, the return spring having one end connected to the cross bar and the other end connected to the skin contact element.

10. The muscle tone test handle of claim 9, wherein the skin contact element comprises:

a circular skin contact body having a skin contacting face and a connecting face opposite the skin contacting face; and

the spring hanging column is convexly arranged on the connecting surface;

the reset spring is a tension spring, and one end of the tension spring is hung on the spring hanging column.

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