A multifunctional insulating rod

Abstract

This invention discloses a multifunctional insulating rod, including a hanging unit comprising a base with vertical poles at both ends of the base, a first through hole at the end of each pole, a rotating component within the first through hole, and a rotating block hinged to one end of the rotating component; a handheld unit comprising an operating rod, one end of which is fixedly connected to the base, a drive rod extending through the operating rod, one end of which passes through the base and is connected to a sliding plate, the sliding plate having a second through hole extending to the drive rod; and a connecting unit comprising a connecting rod within the second through hole, one end of which passes through the sliding plate and the other end through the operating rod and the drive rod, a wire within the connecting rod, one end of which passes through the connecting rod and is connected to a conductor block; when purchasing auxiliary tools for power equipment, only one type of insulating rod of this application needs to be purchased, which can be used as an operating rod for drop-out fuses or as a high-voltage insulating grounding rod, and is securely attached and easy to operate.

Description

Technical Field

[0001] This invention relates to the field of insulating rods, and in particular to a multifunctional insulating rod. Background Technology

[0002] Insulating rods commonly used in the field of power equipment auxiliary tools include: drop-out fuse operating rods and high-voltage insulating grounding rods. Grounding rods are used in power companies, such as power plants and substations, as specialized tools to ensure the safety of workers before maintenance work. They are used when connecting grounding wires to power system busbars, high-voltage transmission lines, and electrical equipment. Drop-out fuse operating rods are used to open and close drop-out fuses. Both require manual operation from the ground using rod-like tools to access equipment at heights. Therefore, when purchasing power equipment auxiliary tools, it is necessary to purchase two types of tools: drop-out fuse operating rods and high-voltage insulating grounding rods. These two tools cannot be used interchangeably. However, because the two tools are similar in shape and usage, they also share similar problems: they are often unstable when suspended, causing accidents and leading to errors by less experienced workers. Therefore, a tool that can perform multiple functions is needed to address this issue. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the specification abstract and the title of the invention, to avoid obscuring the purpose of this section, the specification abstract, and the title of the invention. Such simplifications or omissions shall not be used to limit the scope of the invention.

[0004] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0005] Therefore, the technical problem to be solved by the present invention is that when purchasing auxiliary tools for power equipment, it is necessary to purchase two kinds of tools, namely drop-out fuse operating rod and high-voltage insulating grounding rod. The two tools cannot be used interchangeably. However, because the two tools are similar in shape and usage, they also have similar problems, namely, they are often unstable when suspended, causing accidents and leading to errors in use by less experienced personnel.

[0006] To solve the above technical problems, the present invention provides the following technical solution: a multifunctional insulating rod, comprising a suspension unit including a base, wherein both ends of the base are provided with uprights perpendicular to the base, the end of the upright is provided with a first through hole, a rotating component is provided in the first through hole, and a rotating block is hinged to one end of the rotating component;

[0007] The handheld unit includes an operating lever, one end of which is fixedly connected to a base. A drive rod is disposed inside the operating lever, one end of which passes through the base and is connected to a sliding plate. The sliding plate has a second through hole extending to the drive rod.

[0008] The connecting unit includes a first connecting rod disposed in the second through hole. One end of the first connecting rod passes through the slide plate, and the other end passes through the operating rod and the drive rod. A wire is disposed inside the first connecting rod, and one end of the wire passes through the first connecting rod and is connected to a conductor block.

[0009] As a preferred embodiment of the multifunctional insulating rod of the present invention, wherein: a support portion is provided at one end of the first connecting rod located between the two uprights, and the support portion is movably connected to the first connecting rod;

[0010] An elastic element is provided between the support and the slide plate.

[0011] As a preferred embodiment of the multifunctional insulating rod of the present invention, the support part is provided with a sliding groove, the support part is provided with a limiting groove, and the portion of the conductor block located in the limiting groove is provided with a protrusion.

[0012] In a preferred embodiment of the multifunctional insulating rod of the present invention, a compression spring is provided between the conductor block and the end of the limiting groove.

[0013] In a preferred embodiment of the multifunctional insulating rod of the present invention, clamping plates are hinged to both sides of the conductor block, and the two clamping plates are symmetrically arranged.

[0014] As a preferred embodiment of the multifunctional insulating rod of the present invention, wherein: the rotating component is provided with limiting bosses at both ends of the first through hole, one end of the rotating component is provided with a groove, the groove opens to the side of the rotating component, a rotating hole is provided in the groove, and one end of the rotating block is provided with a hinge shaft, the hinge shaft cooperates with the rotating hole;

[0015] A torsion spring is fitted on the hinge shaft, with one end of the torsion spring embedded in the rotating block and the other end abutting against the side of the slot.

[0016] As a preferred embodiment of the multifunctional insulating rod of the present invention, the upright is provided with a cylindrical groove that extends through the first through hole, the circumferential surface of the rotating part is provided with an annular groove, and one end face of the annular groove is provided with an end face gear.

[0017] A transmission column is provided inside the cylindrical groove, and a spur gear is provided at one end of the transmission column, which meshes with the end face gear;

[0018] The operating lever has an elongated hole extending through to the base, and a drive rod is installed inside the elongated hole.

[0019] As a preferred embodiment of the multifunctional insulating rod of the present invention, the outer periphery of the transmission column is provided with a spiral groove, the side of the upright is provided with a long groove extending axially along the columnar groove, and the side of the sliding plate is provided with a protrusion, the protrusion passing through the long groove and embedded in the spiral groove.

[0020] The base is provided with a spring groove extending into the elongated hole, and a first spring is provided in the spring groove. One end of the first spring is connected to the slide plate.

[0021] In a preferred embodiment of the multifunctional insulating rod of the present invention: the base is provided with a through groove; the slide plate is provided with a sliding groove at the same position as the through groove; a slider is provided in the sliding groove; a guide groove is provided on the side of the sliding groove; a limiting block embedded in the guide groove is provided on the side of the slider; a triangular boss is provided on the other end of the slider near the operating rod; a second spring is provided between the slider and the end face of the sliding groove away from the spring groove; a sleeve is sleeved on the outside of the operating rod; a third spring is provided between one end of the sleeve and the base; and a hand-held part is provided on the end of the operating rod away from the base.

[0022] As a preferred embodiment of the multifunctional insulating rod of the present invention, the operating rod and the sleeve are provided with an axially extending strip groove K at the end away from the base, and the driving rod is provided with a second connecting rod at the end away from the slide plate. The second connecting rod passes through the strip groove K and is connected to an operating ring.

[0023] The beneficial effects of this invention are that when purchasing auxiliary tools for power equipment, only one type of insulating rod of this application needs to be purchased. It can be used as an operating rod for drop-out fuses or as a high-voltage insulating grounding rod. It is also stable to hang and easy to operate. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0025] Figure 1 A schematic diagram of a multifunctional insulating rod according to an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the structure of the multifunctional insulating rod as a high-voltage insulating grounding rod according to an embodiment of the present invention is provided;

[0027] Figure 3 This is a schematic diagram of the structure of the connecting unit in a multifunctional insulating rod according to an embodiment of the present invention;

[0028] Figure 4 A cross-sectional structural diagram of the connecting unit in a multifunctional insulating rod according to an embodiment of the present invention;

[0029] Figure 5 A schematic diagram of the structure of the multifunctional insulating rod as a drop protection operating rod according to an embodiment of the present invention is provided;

[0030] Figure 6 A cross-sectional structural schematic diagram of the multifunctional insulating rod as a drop protection operating rod according to an embodiment of the present invention;

[0031] Figure 7 A schematic diagram of the structure of the multifunctional insulating rod as the operating rod of the drop safety device, according to an embodiment of the present invention, when the drop safety device is attached to the hanging ring;

[0032] Figure 8 This is a schematic diagram of the structure of the multifunctional insulating rod as a drop protection operating rod detaching from the hanging ring, according to one embodiment of the present invention. Detailed Implementation

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the present invention will be described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure will be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0036] Furthermore, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0037] Example 1

[0038] Reference Figure 1 , 5~8, this embodiment provides a multi-functional insulating rod, which includes a suspension unit 100, a handheld unit 200, and a connection unit 300. The suspension unit 100 is used to suspend a wire or the pull ring of a drop fuse. The handheld unit 200 is a support rod, and the connection unit 300 is used to connect with a wire when the multi-functional insulating rod is used as a grounding rod. It should be noted that when the insulating rod is used as an operating rod for a drop fuse, the connection unit 300 needs to be removed before operation.

[0039] Among them, the suspension unit 100 includes a base 101. Vertical rods 101a perpendicular to the base are provided at both ends of the base 101. That is, the base 101 and the vertical rods 101a together form a U-shaped structure.

[0040] Among them, a first through hole 101b is provided at the end of the vertical rod 101a. The axis of the first through hole 101b is perpendicular to the vertical rod 101a, and the first through holes 101b of the two vertical rods 101a are coaxial. A rotating member 102 is provided in the first through hole 101b. The part of the rotating member 102 located in the first through hole 101b is cylindrical. One end of the rotating member 102 is hinged with a rotating block 103. It should be noted that the rotation range of the rotating block 103 is 0~90°.

[0041] Furthermore, the handheld unit 200 includes an operating rod 201. One end of the operating rod 201 is fixedly connected to the base 101, and the length of the operating rod 201 should meet the safety distance.

[0042] The handheld unit 200 includes an operating rod 201. One end of the operating rod 201 is fixedly connected to the base 101. The operating rod 201 is penetrated inside, and a driving rod 202 is provided inside the operating rod 201. One end of the driving rod 202 passes through the base 101 and is connected to a sliding plate 203. The sliding plate 203 is provided with a second through hole 202a penetrating to the driving rod 202.

[0043] It should be noted that when this device is used as an operating rod for a drop fuse, a torsion spring 106 is sleeved on the hinge shaft 103a. One end of the torsion spring 106 is embedded in the rotating block 103, and the other end abuts against the side of the notch 102b. In the initial state, due to the elastic force of the torsion spring 106, the rotating block 103 is perpendicular to the vertical rod 101a. At this time, the deflection angle of the rotating block 103 is set to 0 degrees. The ends of the two rotating blocks 103 are in contact, and the rotating block 103, the base 101, and the vertical rod 101a form a "square" shape. At this time, the opening of the notch 102b faces the inside of the "square". Therefore, at this time, the opening between the two rotating blocks 103 can be opened by pressing the rotating block 103 from the outside. Then, when it is necessary to pull down the drop fuse, in the initial state of the suspension unit 100, the two rotating blocks 103 are moved towards the pull ring of the drop fuse, and the pull ring is made to enter the "square". Since the rotating block cannot deflect towards the base 101 at this time, the drop fuse can be pulled down.

[0044] Furthermore, the upright 101a has a cylindrical groove 101c extending through the first through hole 101b, and the rotating member 102 has an annular groove 102c on its circumferential surface. One end face of the annular groove 102c is provided with an end face gear 102d. A transmission column 104 is disposed within the cylindrical groove 101c, and a spur gear 104a is disposed at one end of the transmission column 104, meshing with the end face gear 102d. Therefore, the rotation of the transmission column 104 can drive the rotating member 102 to rotate, and the rotation range of the rotating member 102 is 0~180°, meaning it can flip the rotating member 102, thereby changing the rotation direction of the rotating block 103.

[0045] Furthermore, the operating lever 201 has an elongated hole 201a extending through to the base 101. A drive rod 202 is installed inside the elongated hole 201a, with one end of the drive rod 202 passing through the base 101 and connected to the slide plate 203. The transmission column 104 has a spiral groove 104b on its outer periphery, and the upright 101a has an elongated groove 101d extending axially along the cylindrical groove 101c on its side. The slide plate 203 has a protrusion 203a on its side, which passes through the elongated groove 101d and is embedded in the spiral groove 104b. Therefore, when the protrusion 203a drives the transmission column 104 to rotate, and when the protrusion 203a moves from one end of the elongated groove to the other end, it drives the spiral groove 104b to rotate one revolution, and the transmission column 104 drives the rotating component 102 to rotate half a revolution.

[0046] The base 101 is provided with a spring groove 101e extending into the elongated hole 201a. A first spring 105 is provided in the spring groove 101e, and one end of the first spring 105 is connected to the slide plate 203. That is, under the action of the spring, when the slide plate 203 moves from the position attached to the base 101 to the position away from the base 101, that is, when the slide plate 203 is at the position farthest from the base 101, the rotating block 103 can be flipped outward. In other words, when the drop safety is pulled, the slide plate 203 is moved to make the rotating component 102 flip, and then the pull ring of the drop safety can be disengaged from the suspension unit 100. In this state, the fuse of the drop safety can be closed.

[0047] The base 101 has a through groove 101f, and the slide plate 203 has a sliding groove 203b in the same position as the through groove 101f. A slider 204 is provided in the sliding groove 203b, and a guide groove 203c is provided on the side of the sliding groove 203b. A limiting block 204a is provided on the side of the slider 204, which is embedded in the guide groove 203c. The slider 204 can move within the sliding groove 203b. A triangular boss 204b is provided on the other end of the slider 204 near the operating lever 201. The triangular boss 204b is a right triangle. A second spring 206 is provided between the slider 204 and the end face of the sliding groove 203b away from the spring groove 101e. The second spring 206 drives the slider 204 to move toward the center of the base 101. Therefore, when the base 101 is in contact with the slide, in order to prevent the slide from moving out, the slider 204 passes through the through groove 101f, and the triangular boss 204b is stuck outside the through groove 101f, connecting the slide and the base 101 to prevent them from separating. This state is the initial state.

[0048] Furthermore, a sleeve 205 is sleeved on the outside of the operating lever 201. A third spring 207 is provided between one end of the sleeve 205 and the base 101. The third spring 207 moves the sleeve 205 away from the base 101. When the fuse tube is closed, it needs to be disengaged from the pull ring of the fuse tube. Therefore, at this time, the operating sleeve 205 moves towards the base 101 and contacts the inclined surface of the triangular boss 204b and pushes it into the through groove 101f. At this time, the slide plate 203 is no longer restricted and pops out under the action of the spring. Then, the rotating part 102 is driven to flip, and then it can be separated.

[0049] Preferably, the end of the operating lever 201 away from the base 101 is provided with a hand grip 201b for easy operation.

[0050] Furthermore, the operating lever 201 and the sleeve 205 are provided with an axially extending strip groove K at the end away from the base 101, and the drive lever 202 is provided with a second connecting rod 202c at the end away from the slide plate 203. The second connecting rod 202c passes through the strip groove K and is connected to the operating ring 208. That is, when the slide plate is in a position away from the base 101, the operating ring 208 can be pulled to make the slide plate move closer to the base 101, and the slider 204 passes through the through groove 101f. The triangular boss 204b is locked outside the through groove 101f to fix the slide plate, so that the detachment of the drop safety fuse can be operated again.

[0051] Therefore, when this device is used as the operating lever for the drop safety, to pull the drop safety, the device is in its initial state. The suspension unit 100 is moved towards the pull ring of the drop safety, and the pull ring enters the suspension unit 100. Then, the handheld unit 200 is dragged downwards to separate the drop safety. Next, the sleeve 205 is moved upwards, contacting the inclined surface of the triangular boss 204b and pushing it into the through groove 101f. At this point, the slide plate 203 is no longer restricted and pops out under the action of the spring. Then, the rotating component 102 is driven to flip, allowing separation. The slide plate is now close to the base 101, allowing the drop safety to be closed. After closing, the operating ring 208 is pulled to bring the slide plate closer to the base 101, and the slider 204 passes through the through groove 101f. The triangular boss 204b is locked outside the through groove 101f, fixing the slide plate. This allows for the re-operation of detaching the drop safety fuse.

[0052] Example 2

[0053] Reference Figures 1-8 This is the second embodiment of the present invention, which is based on the previous embodiment and differs from the previous embodiment in that:

[0054] In this embodiment, when the device is used as a grounding rod for a high-voltage grounding wire, the suspension unit 100 in Embodiment 1 can be hung on a horizontally installed conductor at a high altitude, and the way it is hung is the same as the way it is connected to the drop protection ring.

[0055] The connecting unit 300 includes a first connecting rod 301 disposed within the second through hole 202a. The first connecting rod 301 is an insulated structure. One end of the first connecting rod 301 passes through the slide plate 203, and the other end passes through the operating rod 201 and the drive rod 202. A wire 302 is disposed within the first connecting rod 301. One end of the wire 302 passes through the first connecting rod 301 and is connected to a conductor block 303. When a horizontal wire is suspended above, the conductor block 303 contacts it, and the other end of the wire 302 can be grounded.

[0056] Furthermore, a support portion 301a is provided at one end of the first connecting rod 301 located between the two uprights 101a. The support portion 301a is movably connected to the first connecting rod 301, preferably by a threaded connection, and can be removed when not in use.

[0057] An elastic element 304 is provided between the support part 301a and the slide plate 203. The elastic element 304 is a spring. Under the action of the spring, the conductor block 303 and the rotating block 103 clamp the wire that needs to be grounded.

[0058] The support portion 301a is provided with a sliding groove 301b, and a limiting groove 301c is provided within the support portion 301a. The width of the limiting groove 301c is greater than the width of the sliding groove 301b. A protrusion 303a is provided on the portion of the conductor block 303 located in the limiting groove 301c. The protrusion 303a can limit the movement range of the conductor block 303. A compression spring 305 is provided between the conductor block 303 and the end of the limiting groove 301c. Similarly, the compression spring 305 can push the conductor block 303 to press against the wire that needs to be grounded.

[0059] Preferably, clamping plates 306 are hinged to both sides of the conductor block 303. The two clamping plates 306 are symmetrically arranged. Therefore, when the conductor to be grounded is placed on the conductor block 303 and is pressed in both the upper and lower directions, the elastic force of the elastic element 304 is greater than the elastic force of the compression spring 305. As a result, part of the conductor block 303 will be pressed into the slide groove 301b. Then, due to the limiting on both sides of the slide groove 301b and the hinge structure of the clamping plate 306, the clamping plate 306 deflects upward about the hinge point. Both clamping plates 306 deflect upward at the same time, so that the conductor to be grounded is in the groove formed by the two clamping plates 306 and the conductor block 303. This prevents the conductor to be grounded, i.e., the high-voltage line, from slipping off the conductor block 303 when the insulating rod shakes.

[0060] In this embodiment, when the high-voltage line no longer needs to be grounded, the insulating rod can be removed. At this time, the sleeve 205 is operated to move upward, and the sleeve 205 contacts the inclined surface of the triangular boss 204b and pushes it into the through groove 101f. At this time, the slide plate 203 is no longer restricted and pops out under the action of the spring. Then, the rotating part 102 is driven to flip, and then it can be separated and the insulating rod can be removed.

[0061] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0062] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0063] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A multifunctional insulating rod, characterized in that: include, The suspension unit (100) includes a base (101), both ends of which are provided with uprights (101a) perpendicular to the base. The end of the upright (101a) is provided with a first through hole (101b), and a rotating component (102) is provided in the first through hole (101b). One end of the rotating component (102) is hinged to a rotating block (103). The handheld unit (200) includes an operating lever (201), one end of which is fixedly connected to the base (101). The operating lever (201) is internally connected and a drive rod (202) is provided inside the operating lever (201). One end of the drive rod (202) passes through the base (101) and is connected to a slide plate (203). The slide plate (203) is provided with a second through hole (202a) that extends through the drive rod (202). The connecting unit (300) includes a first connecting rod (301) disposed in the second through hole (202a). One end of the first connecting rod (301) passes through the slide plate (203), and the other end passes through the operating rod (201) and the driving rod (202). A wire (302) is disposed in the first connecting rod (301). One end of the wire (302) passes through the first connecting rod (301) and is connected to a conductor block (303). The first connecting rod (301) is provided with a support part (301a) at one end between the two uprights (101a), and the support part (301a) is movably connected to the first connecting rod (301); An elastic element (304) is provided between the support (301a) and the slide (203). The support part (301a) is provided with a sliding groove (301b), and a limiting groove (301c) is provided inside the support part (301a). The portion of the conductor block (303) located in the limiting groove (301c) is provided with a protrusion (303a). A compression spring (305) is provided between the conductor block (303) and the end of the limiting groove (301c); The conductor block (303) has clamping plates (306) hinged to both sides, and the two clamping plates (306) are arranged symmetrically. The rotating component (102) is provided with limiting bosses (102a) at both ends of the first through hole (101b). One end of the rotating component (102) is provided with a groove (102b) that opens to the side of the rotating component (102). A rotating hole is provided inside the groove (102b). One end of the rotating block (103) is provided with a hinge shaft (103a) that engages with the rotating hole. A torsion spring (106) is sleeved on the hinge shaft (103a). One end of the torsion spring (106) is embedded in the rotating block (103), and the other end abuts against the side of the slot (102b). The upright (101a) has a cylindrical groove (101c) that extends through the first through hole (101b) inside. The rotating part (102) has an annular groove (102c) on its circumferential surface. An end face gear (102d) is provided on one end face of the annular groove (102c). A transmission column (104) is provided in the cylindrical groove (101c), and a spur gear (104a) is provided at one end of the transmission column (104), which meshes with the end face gear (102d); The operating lever (201) has an elongated hole (201a) that extends through to the base (101), and a drive rod (202) is disposed inside the elongated hole (201a). The transmission column (104) has a spiral groove (104b) on its outer periphery, the upright (101a) has a long groove (101d) extending axially along the cylindrical groove (101c) on its side, and the slide plate (203) has a protrusion (203a) on its side. The protrusion (203a) passes through the long groove (101d) and is embedded in the spiral groove (104b). The base (101) is provided with a spring groove (101e) extending into the elongated hole (201a), and a first spring (105) is provided in the spring groove (101e). One end of the first spring (105) is connected to the slide plate (203). The base (101) is provided with a through groove (101f), and the slide plate (203) is provided with a sliding groove (203b) at the same position as the through groove (101f). A slider (204) is provided in the sliding groove (203b), and a guide groove (203c) is provided on the side of the sliding groove (203b). A limiting block (204a) embedded in the guide groove (203c) is provided on the side of the slider (204), and the other end of the slider (204) is close to the operating lever ( A triangular boss (204b) is provided on one side of the slider (204); a second spring (206) is provided between the slider (204) and the end face of the sliding groove (203b) away from the spring groove (101e); a sleeve (205) is sleeved on the outside of the operating rod (201), a third spring (207) is provided between one end of the sleeve (205) and the base (101), and a hand-held part (201b) is provided at the end of the operating rod (201) away from the base (101); The operating lever (201) and sleeve (205) are provided with an axially extending strip groove (K) at the end away from the base (101), and the driving lever (202) is provided with a second connecting rod (202c) at the end away from the slide plate (203). The second connecting rod (202c) passes through the strip groove (K) and is connected to the operating ring (208).

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