CN114068080A

CN114068080A - Bionic electric wire

Info

Publication number: CN114068080A
Application number: CN202111554502.5A
Authority: CN
Inventors: 林东鸿; 葛曙光; 林必祥
Original assignee: Shenzhen Dongjiaxinte Cable Co ltd
Current assignee: Shenzhen Dongjiaxinte Cable Co ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-02-18
Anticipated expiration: 2041-12-17
Also published as: CN114068080B

Abstract

The invention relates to the technical field of electric wires, in particular to a bionic electric wire. Comprises an outer pipe body of the electric wire, a pest prevention unit and an electric power conduction unit; the power conducting unit is installed in the outer tube body of the electric wire; the damage prevention unit comprises a support sleeve; the support sleeve is sleeved outside the outer pipe body of the electric wire, a storage cavity is formed in the support sleeve, a plurality of groups of bionic balls are arranged in the storage cavity, and the bionic balls are made of a mixture of protein and uric acid; store the intracavity wall on average distribute have a plurality of groups air vent, just store the intracavity and install a plurality of groups shape memory canceling release mechanical system, the shape memory canceling release mechanical system other end runs through to the air vent outside, and installs the silica gel roof. The invention can realize the purpose of expelling insects and mice by utilizing a bionic means, and reduces the harm of the prior chemical synthetic drugs to human bodies.

Description

Bionic electric wire

Technical Field

The invention belongs to the technical field of electric wires, and particularly relates to a bionic electric wire.

Background

The electric wire is one of the most common articles in daily life, is mainly used for conducting electric power and provides convenience for life of people.

When the wire is used, the wire is usually exposed in the air and is very easy to be bitten by insects and rats, so that the power transmission is influenced, and therefore, how to improve the insect and rat repelling capability of the wire is a problem to be solved continuously.

The traditional method for expelling the insects and the rats mainly comprises the steps of placing a rat sticking plate beside the electric wire or coating rodenticide on the surface of the electric wire. However, the former has poor effect and high cost, and the latter is easily harmful to human body because the raticide is a chemical composition and is exposed in air.

Disclosure of Invention

In view of the above problems, the present invention provides a bionic electric wire, comprising an outer electric wire body, an anti-damage unit and an electric power conducting unit; the power conducting unit is installed in the outer tube body of the electric wire;

the damage prevention unit comprises a support sleeve; the support sleeve is sleeved outside the outer pipe body of the electric wire, a storage cavity is formed in the support sleeve, a plurality of groups of bionic balls are arranged in the storage cavity, and the bionic balls are made of a mixture of protein and uric acid; a plurality of groups of air vents are evenly distributed on the inner wall of the storage cavity, a plurality of groups of shape memory resetting mechanisms are installed in the storage cavity, and the other ends of the shape memory resetting mechanisms penetrate through the outside of the air vents and are provided with silica gel top plates; the silica gel top plate is of a fan-shaped ring structure, the outer diameter of the silica gel top plate is larger than the inner diameter of the air vent, and the edges of the periphery of the silica gel top plate are movably attached to the outer wall of the support sleeve;

the shape memory resetting mechanism comprises a plurality of groups of base plates which are arranged at equal intervals, a group of shape memory polymerization blocks are arranged between every two adjacent groups of base plates, and the shape memory polymerization blocks are made of polyurethane polymers.

Furthermore, an outer tube isolation cavity is formed in the outer tube of the electric wire, and the shell of the power conduction unit is located in the outer tube isolation cavity.

Further, the central axis of the shell of the power conducting unit coincides with the central axis of the outer tube of the electric wire.

Furthermore, a plurality of groups of insulating rods are distributed on the inner wall of the outer tube isolation cavity in an annular array mode by taking the central axis of the outer tube of the electric wire as the center, and the other ends of the insulating rods are fixedly installed on the outer wall of the shell of the power conduction unit.

Further, the power conducting unit includes an in-wire tube; the inner wire tube is positioned in the outer tube isolation cavity, and the central axis of the inner wire tube is superposed with the central axis of the outer wire tube; and one ends of the plurality of groups of insulating rods, which are far away from the inner wall of the isolation cavity of the outer pipe body, are distributed on the outer wall of the inner pipe body of the electric wire in an annular array.

Further, the power conducting unit further comprises a center post; an isolation layer is arranged in the inner wire tube body, a conductive cavity is arranged in the isolation layer, the central column is fixedly arranged in the conductive cavity, and the central axis of the central column is superposed with the central axis of the inner wire tube body; a plurality of groups of isolation plates are distributed on the outer wall of the central column in an annular array mode, the other ends of the isolation plates are fixedly installed on the inner wall of the conductive cavity, and the isolation plates are of a corrugated structure.

Further, the power conducting unit further comprises a plurality of groups of conducting mechanisms; the conductive cavity is divided into a plurality of groups of independent cavities distributed in an annular array through a plurality of groups of isolation plates, and a plurality of groups of conductive mechanisms are evenly distributed in each group of independent cavities; and a plurality of groups of filling particles are filled in the gap between the inner wall of the independent cavity and the outer wall of the shell of the conductive mechanism.

Further, the conductive mechanism comprises a conductive wire outer tube; the outer pipe of the conducting wire is located in the independent cavity, an insulating pipe is sleeved on the inner wall of the outer pipe of the conducting wire, and a copper wire is fixedly installed in the insulating pipe.

Furthermore, a plurality of groups of hollow tubes are distributed in the storage cavity in an annular array manner, and an outer tube resetting unit is fixedly arranged in each hollow tube.

Furthermore, the outer tube reset unit comprises a reset rod which is fixedly installed in the hollow tube cavity, a reset spring is sleeved on the reset rod, the reset rod comprises a plurality of groups of clamping rods which are arranged at equal intervals, and a group of hinge balls are hinged between every two adjacent groups of clamping rods.

The invention has the beneficial effects that:

1. the bionic ball with protein uric acid as a main component simulates the smell of natural enemies of insects and rats such as snakes and cats, when the insects and rats bite the silica gel top plate on the supporting sleeve, the silica gel top plate can be displaced and deformed to expose the vent hole, then the smell generated by the bionic ball can be emitted through the vent hole and captured by the insects and rats, the insects and rats mistakenly think that the natural enemies exist at the position, and the function of expelling the insects and rats is achieved by a means of simulating the smell of the natural enemies of the insects and rats, so that the bionic purpose is achieved. Reduces the harm of the traditional chemical synthesis medicine to human body. And the bionic ball is located and stores the intracavity, and only when suffering the worm and mouse to gnaw and bite and make the silica gel roof take place displacement deformation, the smell just can distribute, need not to place in the open air, has reduced the risk of human touch, has reduced the injury to the human body.

2. When the insects and the rats leave, the shape memory polymer block made of polyurethane polymer enables the shape memory resetting mechanism to be reset integrally, so that the silica gel top plate covers the air vent again. So as to prevent the odor from diffusing, prolong the service life of the bionic ball and reduce the waste of materials.

3. When the whole bionic electric wire is pulled or folded, the reset rod on the stressed side is bent, so that the included angle between the clamping rods of each group is changed, the group of reset springs is opened, and the group of reset springs on the opposite side can be contracted relatively. Then, the two groups of deformed reset springs are quickly reset by utilizing the elasticity of the reset springs, and the two groups of reset rods corresponding to the two groups of deformed reset springs are driven to reset. Therefore, the force generated by pulling or folding is offset, the whole bionic electric wire is protected, and the strength of the bionic electric wire is improved.

4. The outer tube isolation cavity is arranged outside the inner tube of the electric wire, the outer tube isolation cavity is isolated through the insulating rods distributed in the annular array, and the isolation layer is further arranged in the inner tube of the electric wire, so that the isolation strength between the conducting mechanism and the outside is enhanced, the insulativity is improved, and the heat preservation performance is also improved. Meanwhile, each group of corrugated isolation plates is used for isolating the conductive cavities into a plurality of groups of independent cavities, and each group of conductive mechanisms is respectively placed in each group of independent cavities. And the insulating tube sleeved outside the copper wire is additionally arranged, so that the copper wires in the independent cavities of each group cannot interfere with each other due to the abrasion of the outer tube, and the overall safety of the bionic electric wire is improved.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 shows a schematic structural diagram of a biomimetic wire according to an embodiment of the present invention;

FIG. 2 shows a schematic cross-sectional end view of a biomimetic wire according to an embodiment of the present invention;

FIG. 3 shows a schematic structural view of a pest control unit according to an embodiment of the present invention;

FIG. 4 shows a schematic view in partial section of a pest control unit according to an embodiment of the present invention;

FIG. 5 illustrates a schematic structural view of a shape memory reduction mechanism according to an embodiment of the present invention;

fig. 6 is a schematic structural view illustrating an outer tube resetting unit according to an embodiment of the present invention;

FIG. 7 shows a schematic view of a connection of a jamming rod and a hinged ball according to an embodiment of the present invention;

figure 8 shows a schematic end-sectional view of an electric power conducting unit according to an embodiment of the invention;

fig. 9 shows a schematic end-sectional view of a conductive mechanism according to an embodiment of the invention.

In the figure: 100. an outer wire body; 110. an outer body isolation cavity; 200. a pest prevention unit; 210. a support sleeve; 220. a hollow tube; 230. a storage chamber; 240. a bionic ball; 250. a vent; 260. a silica gel top plate; 270. a shape memory reset mechanism; 271. a base plate; 272. a shape memory polymeric block; 300. an insulating rod; 400. an outer tube resetting unit; 410. a reset rod; 411. clamping the rod; 412. hinging the ball; 420. a return spring; 500. a power conducting unit; 510. an electric wire inner tube; 520. an isolation layer; 530. a central column; 540. a separator plate; 550. a conductive mechanism; 551. a conductive wire outer tube; 552. an insulating tube; 553. a copper wire; 560. and (4) filling particles.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.

The embodiment of the invention provides a bionic electric wire. Including an electric wire outer tube 100, a harmful unit 200, and a power conducting unit 500. For example, as shown in fig. 1 and fig. 2, an outer pipe isolation cavity 110 is formed in the outer wire pipe 100, a housing of the power conducting unit 500 is located in the outer pipe isolation cavity 110, and a central axis of the housing of the power conducting unit 500 coincides with a central axis of the outer wire pipe 100. The power conducting unit 500 is used to conduct power.

The inner wall of the outer tube isolation cavity 110 is provided with a plurality of groups of insulating rods 300 distributed in an annular array with the central axis of the outer wire tube 100 as the center, and the other ends of the insulating rods 300 are fixedly arranged on the outer wall of the shell of the power conduction unit 500.

The shell of the damage prevention unit 200 is sleeved outside the outer wire body 100, and the central axis of the shell of the damage prevention unit 200 coincides with the central axis of the outer wire body 100. The pest prevention unit 200 is used to prevent insects and mice from biting the electric wire.

A plurality of groups of outer tube resetting units 400 are distributed in the inner cavity of the harmful unit 200 in an annular array. The outer tube resetting unit 400 is used to prevent the electric wire from being damaged due to deformation caused by an external force.

The damage prevention unit 200 includes a support sleeve 210. For example, as shown in fig. 3 and 4, the support sleeve 210 is sleeved outside the outer wire body 100, and a central axis of the support sleeve 210 coincides with a central axis of the outer wire body 100. The support sleeve 210 has a storage cavity 230 formed therein. A plurality of groups of bionic balls 240 are arranged in the storage cavity 230, and the bionic balls 240 are made of a mixture of, but not limited to, protein uric acid. Store chamber 230 and keep away from on one side inner wall of outer pipe body 100 of electric wire and evenly distribute and have a plurality of groups of blow vent 250, just store chamber 230 internal fixation and have a plurality of groups shape memory canceling release mechanical system 270, the shape memory canceling release mechanical system 270 other end runs through to the blow vent 250 is outside, and fixed mounting has silica gel roof 260. Silica gel roof 260 is fan annular structure, just the outer diameter of silica gel roof 260 is greater than the inner diameter of blow vent 250, silica gel roof 260 all around the edge all activity laminating be in support on the outer wall of cover 210. A plurality of groups of hollow tubes 220 are distributed in the storage cavity 230 in an annular array.

The shape memory resetting mechanism 270 includes a plurality of sets of pads 271 arranged at equal intervals, for example, as shown in fig. 5, a set of shape memory polymer blocks 272 is disposed between two adjacent sets of pads 271, and the material of the shape memory polymer blocks 272 is not limited to polyurethane polymer.

The support sleeve 210 is sleeved on the outer wall of the outer wire tube 100, so when a pest bites the wire, the pest first contacts the support sleeve 210, especially the silica gel top plate 260 on the surface of the support sleeve 210. Because the silica gel roof 260 is connected by shape memory canceling release mechanical system 270 to silica gel roof 260 edge all around is the activity laminating on the outer wall of supporting cover 210, consequently suffers when gnawing when silica gel roof 260, very easily takes place displacement deformation, and takes place the deformation with this drive shape memory canceling release mechanical system 270. When the deformation displacement reaches a certain range, the vent 250 is exposed, and because the bionic ball 240 adopts the protein uric acid mixture as the main material, the bionic ball 240 can emit the odor of the natural enemies of insects and rats such as snakes, cats and the like. When the vent 250 is exposed, the odors are emitted and captured by the vermin and mice, causing the vermin and mice to mistakenly assume that a natural enemy is present and escapes. The insect and mouse expelling function is achieved by a means of simulating the natural enemy smell of the insect and mouse, so that the bionic purpose is achieved. Compared with the traditional chemical composition for expelling insects and rats, the harm is reduced, the bionic ball 240 is positioned in the storage cavity 230, and only when the bionic ball is bitten by the insects and rats and causes the silica gel top plate 260 to displace and deform, the smell can be emitted without being placed in the open air, so that the risk of touching the human body is reduced, and the harm to the human body is reduced. Meanwhile, after the worm and mouse leave, the shape memory polymer block 272 made of polyurethane polymer enables the shape memory resetting mechanism 270 to be reset integrally, so that the silicone top plate 260 covers the air vent 250 again. So as to prevent the odor from diffusing, prolong the service life of the bionic ball 240 and reduce the waste of materials.

The smell of the natural enemies of insects and rats such as snakes and cats is simulated by the bionic ball 240 taking protein uric acid as the main component, when the insects and rats bite the silica gel top plate 260 on the support sleeve 210, the insects and rats are displaced and deformed, the vent holes 250 are exposed, then the smell generated by the bionic ball 240 is emitted through the vent holes 250 and captured by the insects and rats, the insects and rats mistakenly think that the natural enemies exist at the positions, and the function of expelling the insects and rats is achieved by a means of simulating the smell of the natural enemies of the insects and rats, so that the bionic purpose is achieved. Reduces the harm brought by the traditional drug which takes chemical composition as main component and repels insects and mice. And the bionic ball 240 is located in the storage cavity 230, and only when the bionic ball is bitten by insects and rats and makes the silica gel top plate 260 generate displacement deformation, the smell can be emitted without being placed in the open air, so that the risk of touching the human body is reduced, and the harm to the human body is reduced.

When the bug and the mouse leave, the shape memory polymer block 272 made of polyurethane polymer enables the shape memory resetting mechanism 270 to be reset integrally, so that the silicone top plate 260 covers the air vent 250 again. So as to prevent the odor from diffusing, prolong the service life of the bionic ball 240 and reduce the waste of materials.

The outer tube reduction unit 400 includes a reduction bar 410. Illustratively, as shown in fig. 6 and 7, the reset rod 410 is fixedly installed in the cavity of the hollow tube 220, and a reset spring 420 is sleeved on the reset rod 410. The reset rod 410 comprises a plurality of groups of clamping rods 411 which are arranged at equal intervals, and a group of hinge balls 412 are hinged between every two adjacent groups of clamping rods 411.

The sets of reduction rods 410 within the support sleeve 210 are distributed in an annular array. The reset rod 410 is composed of a plurality of groups of clamping rods 411 which are sequentially hinged end to end, so that the reset rod 410 cannot be broken when being pulled and twisted by external force. And a return spring 420 is sleeved outside the return rod 410. When the outer wire pipe body 100 is pulled or folded, the reset rod 410 on the stressed side is bent, so that the included angle between the clamping rods 411 changes, the set of reset springs 420 is expanded, and the set of reset springs 420 on the opposite side is contracted. Then, the two sets of deformed return springs 420 are rapidly reset by using the elasticity of the return springs 420, and the two sets of corresponding return rods 410 are driven to reset. Therefore, the force generated by pulling or folding is offset, the whole bionic electric wire is protected, and the strength of the bionic electric wire is improved.

When the whole bionic electric wire is pulled or folded, the reset rod 410 on the stressed side is bent, so that the included angle between the clamping rods 411 is changed, the group of reset springs 420 is expanded, and the group of reset springs 420 on the opposite side is contracted relatively. Then, the two sets of deformed return springs 420 are rapidly reset by using the elasticity of the return springs 420, and the two sets of corresponding return rods 410 are driven to reset. Therefore, the force generated by pulling or folding is offset, the whole bionic electric wire is protected, and the strength of the bionic electric wire is improved.

The power conducting unit 500 includes an in-wire tube 510, a center post 530, and several sets of conducting mechanisms 550. Illustratively, as shown in fig. 8, the inner wire tube 510 is located in the outer tube isolation cavity 110, and a central axis of the inner wire tube 510 coincides with a central axis of the outer wire tube 100. A plurality of groups of the insulating rods 300 are distributed on the outer wall of the inner wire tube 510 in an annular array at the end away from the inner wall of the outer tube isolation chamber 110. An isolation layer 520 is disposed in the inner wire tube 510, a conductive cavity is disposed in the isolation layer 520, the central column 530 is fixedly mounted in the conductive cavity, and a central axis of the central column 530 coincides with a central axis of the inner wire tube 510. A plurality of groups of isolation plates 540 are distributed on the outer wall of the central column 530 in an annular array with the central axis of the inner wire tube 510 as the center, the other ends of the isolation plates 540 are respectively and fixedly mounted on the peripheral inner walls of the conductive cavity, and the isolation plates 540 are in a corrugated structure. The conductive cavity is divided into a plurality of groups of independent cavities distributed in an annular array by a plurality of groups of isolation plates 540, and a plurality of groups of conductive mechanisms 550 are evenly distributed in each group of independent cavities. The gaps between the inner wall of the independent cavity and the outer wall of the housing of the conductive mechanism 550 are filled with a plurality of groups of filler particles 560.

The conductive mechanism 550 includes a conductive wire outer tube 551. Illustratively, as shown in fig. 9, the outer conductive wire tube 551 is located in the independent cavity, an insulating tube 552 is sleeved on the inner wall of the outer conductive wire tube 551, and a copper wire 553 is fixedly installed in the insulating tube 552.

The outer tube isolation cavity 110 is arranged outside the inner wire tube 510, the outer tube isolation cavity is isolated by the insulating rods 300 distributed in an annular array, and the isolation layer 520 is further arranged in the inner wire tube 510, so that the isolation strength between the conductive mechanism 550 and the outside is enhanced, the insulation performance is improved, and the heat preservation performance is also improved. At the same time, the conductive cavities are separated into groups of independent cavities by groups of corrugated separating plates 540, and groups of conductive mechanisms 550 are respectively placed in the groups of independent cavities. And the insulating tube 552 sleeved outside the copper lead 553 is added, so that the copper lead 553 in each group of independent cavities can not interfere with each other due to the abrasion of the outer tube 551 of the conductive wire, and the overall safety of the bionic wire is improved.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A bionic electric wire is characterized in that: comprises an outer wire tube (100), a pest prevention unit (200) and an electric power conduction unit (500); the power conducting unit (500) is installed in the outer wire pipe body (100);

the damage prevention unit (200) includes a support sleeve (210); the support sleeve (210) is sleeved outside the outer wire body (100), a storage cavity (230) is formed in the support sleeve (210), a plurality of groups of bionic balls (240) are arranged in the storage cavity (230), and the bionic balls (240) are made of a mixture of protein and uric acid; a plurality of groups of air vents (250) are evenly distributed on the inner wall of the storage cavity (230), a plurality of groups of shape memory resetting mechanisms (270) are installed in the storage cavity (230), and the other ends of the shape memory resetting mechanisms (270) penetrate through the outside of the air vents (250) and are provided with silica gel top plates (260); the silica gel top plate (260) is of a fan-shaped annular structure, the outer diameter of the silica gel top plate (260) is larger than the inner diameter of the vent (250), and the edges of the periphery of the silica gel top plate (260) are movably attached to the outer wall of the support sleeve (210);

the shape memory resetting mechanism (270) comprises a plurality of groups of base plates (271) which are arranged at equal intervals, a group of shape memory polymerization blocks (272) are arranged between every two adjacent groups of base plates (271), and the shape memory polymerization blocks (272) are made of polyurethane polymers.

2. The bionic electric wire according to claim 1, characterized in that: an outer pipe isolation cavity (110) is formed in the outer wire pipe (100), and a shell of the power conduction unit (500) is located in the outer pipe isolation cavity (110).

3. The bionic electric wire according to claim 2, wherein: the central axis of the shell of the power conduction unit (500) coincides with the central axis of the outer wire body (100).

4. A biomimetic wire according to claim 3, wherein: the inner wall of the outer tube isolation cavity (110) is centered on the central axis of the outer wire tube (100), a plurality of groups of insulating rods (300) are distributed in an annular array mode, and the other ends of the insulating rods (300) are fixedly installed on the outer wall of the shell of the power conduction unit (500).

5. The bionic electric wire according to claim 4, wherein: the power conducting unit (500) comprises an in-wire body (510); the inner wire body (510) is positioned in the outer body isolation cavity (110), and the central axis of the inner wire body (510) is coincident with the central axis of the outer wire body (100); and one ends of a plurality of groups of insulating rods (300) far away from the inner wall of the outer pipe body isolation cavity (110) are distributed on the outer wall of the electric wire inner pipe body (510) in an annular array.

6. The bionic electric wire according to claim 5, wherein: the power conducting unit (500) further comprises a center post (530); an isolation layer (520) is arranged in the wire inner tube (510), a conductive cavity is arranged in the isolation layer (520), the central column (530) is fixedly installed in the conductive cavity, and the central axis of the central column (530) is overlapped with the central axis of the wire inner tube (510); a plurality of groups of isolation plates (540) are distributed on the outer wall of the central column (530) in an annular array mode, the other ends of the isolation plates (540) are fixedly installed on the inner wall of the conductive cavity, and the isolation plates (540) are of a corrugated structure.

7. The bionic electric wire according to claim 6, wherein: the power conducting unit (500) further comprises several sets of electrically conductive means (550); the conductive cavity is divided into a plurality of independent cavities distributed in an annular array through a plurality of groups of isolation plates (540), and a plurality of groups of conductive mechanisms (550) are evenly distributed in each group of independent cavities; gaps between the inner wall of the independent cavity and the outer wall of the shell of the conductive mechanism (550) are filled with a plurality of groups of filling particles (560).

8. The biomimetic wire according to claim 7, wherein: the conductive mechanism (550) comprises a conductive wire outer tube (551); the conducting wire outer tube (551) is located in the independent cavity, an insulating tube (552) is sleeved on the inner wall of the conducting wire outer tube (551), and a copper lead (553) is fixedly installed in the insulating tube (552).

9. The bionic electric wire according to claim 2, wherein: a plurality of groups of hollow tubes (220) are distributed in the storage cavity (230) in an annular array, and an outer tube resetting unit (400) is fixedly arranged in each hollow tube (220).

10. The biomimetic wire of claim 9, wherein: the outer tube resetting unit (400) comprises a resetting rod (410), the resetting rod (410) is fixedly installed in the cavity of the hollow tube (220), a resetting spring (420) is sleeved on the resetting rod (410), the resetting rod (410) comprises a plurality of groups of clamping rods (411) which are arranged at equal intervals, and a group of hinged balls (412) are hinged between every two adjacent groups of clamping rods (411).