CN213064297U - Hook mounted on guide rail - Google Patents

Abstract

The utility model discloses a hook installed on a guide rail, which comprises a collision hook and a telescopic hook which are respectively installed on two sides of equipment, wherein the collision hook comprises a collision hook fixing seat and a sliding clamping piece, and the front end of the collision hook fixing seat is provided with a first U-shaped clamping groove with an upward opening; a first compression spring is arranged in the collision hook fixing seat and used for pushing the sliding clamping piece forwards to clamp and lock the square hole of the guide rail in the first U-shaped clamping groove; the telescopic hook comprises a telescopic hook fixing seat and a telescopic clamping piece, and the front end of the telescopic clamping piece is provided with a second U-shaped clamping groove with a downward opening; the second compression spring is arranged in the telescopic hook fixing seat and used for pushing the telescopic clamping piece forward to enable the second U-shaped clamping groove to extend out of the telescopic hook fixing seat so as to enable the square hole of the guide rail to be automatically separated when the telescopic hook is detached from the guide rail. Whether the collision hook is firmly installed or not can be observed through the dismounting hole, the telescopic hook is automatically dismounted through the spring telescopic device, and the collision hook can be well adapted to the situation that the distance difference between the guide rails is large.

Description

Hook mounted on guide rail

Technical Field

The utility model belongs to the technical field of machinery research and development, especially, relate to an install couple on the guide rail.

Background

At present, when mechanical equipment with a complex structure and strong functions is generally researched and designed, the design in the aspects of reliability and performance of the internal structure is generally emphasized, and the design of functional parts for mounting, dismounting and the like of hooks and the like is neglected.

The existing devices are generally composed of a collision hook and a telescopic hook (such as the patent-hook assembly and device with application number CN201910990242.2 and the method for assembling and disassembling the same), but they have the following disadvantages:

1. after the collision hook is installed, whether the collision hook is firmly connected with the guide rail cannot be detected;

2. the telescopic hook needs to be manually disassembled during disassembly;

3. the tolerance requirement of the combination of the telescopic hook and the collision hook on the distance between the guide rails is strict, and when the actual installation distance between the two guide rails is greatly different from the design value, certain influence is exerted on equipment installation.

SUMMERY OF THE UTILITY MODEL

Based on the not enough of above prior art, the utility model provides a technical problem who solves provides an install couple on the guide rail, and compact structure can solve between the guide rail when distance tolerance is great, and equipment fixing receives the problem of influence to flexible couple can deviate from automatically when dismantling, need not manual dismantlement, can be applied to the equipment that has the quick assembly disassembly demand.

In order to solve the technical problem, the utility model discloses a following technical scheme realizes: the utility model provides a hook installed on a guide rail, wherein the guide rail is provided with a plurality of square holes distributed at equal intervals, and the hook comprises a collision hook and a telescopic hook which are respectively installed on two sides of equipment; the collision hook comprises a collision hook fixing seat fixedly connected with equipment and a sliding clamping piece connected to the inside of the collision hook fixing seat in a sliding manner, and the front end of the collision hook fixing seat is provided with a first U-shaped clamping groove with an upward opening; a first compression spring which is abutted with the sliding clamping piece is arranged in the collision hook fixing seat and is used for pushing the sliding clamping piece forwards to clamp and lock the square hole of the guide rail in the first U-shaped clamping groove; the telescopic hook comprises a telescopic hook fixing seat fixedly connected with equipment and a telescopic clamping piece connected to the inside of the telescopic hook fixing seat in a sliding manner, and the front end of the telescopic clamping piece is provided with a second U-shaped clamping groove with a downward opening; the telescopic hook fixing seat is internally provided with a second compression spring which is abutted to the telescopic clamping piece and used for pushing the telescopic clamping piece forward to enable the second U-shaped clamping groove to extend out of the telescopic hook fixing seat so as to enable the square hole of the guide rail to be automatically separated when the telescopic hook is detached from the guide rail.

By last, collision couple is installed in the square hole of guide rail from up the cooperation through slip fastener and first U type draw-in groove down, then flexible couple is installed in the square hole of another guide rail from the cooperation of down passing through flexible fastener and second U type draw-in groove down, flexible fastener can stretch out according to the interval between two guide rails and install, in addition, flexible couple passes through the flexible automatic dismouting of realization of spring, need not to operate it alone during the equipment dismouting, is applied to the equipment that has the quick assembly disassembly demand.

Optionally, the bottom of the sliding card is provided with a removal hole into which the toggle piece is inserted, and after the toggle piece is inserted into the removal hole, the elastic force of the first compression spring can be overcome to enable the sliding card to move backwards, so that the sliding card exits from the square hole of the guide rail to take down the collision hook.

Furthermore, a waist-shaped hole corresponding to the dismounting hole is formed in the mounting position of the collision hook on the equipment, the length of the waist-shaped hole is equal to the maximum stroke distance of the dismounting hole, and the waist-shaped hole is used for observing whether the sliding clamping piece rebounds to the right position under the action of the first compression spring.

From above, whether equipment is installed firmly can be observed through dismantling hole and waist shape hole to the collision couple.

Optionally, one end of the sliding fastener, which is far away from the first compression spring, is formed into an inclined surface which facilitates the guide rail to enter the first U-shaped slot.

By last, through the design of the inclined plane of sliding fastener, be favorable to the bottom of guide rail easier inserting first U type draw-in groove.

Optionally, a through hole for inserting the tip of the sliding card is arranged on the side wall of the first U-shaped slot far away from the first compression spring.

By last, make the locking of sliding clamp spare and first U type draw-in groove butt more firm, guarantee its locking reliability.

Furthermore, a long strip-shaped sliding groove is formed in the tail of the telescopic clamping piece, a positioning hole penetrates through the side wall of the telescopic hook fixing seat, and the positioning pin penetrates through the positioning hole and the long strip-shaped sliding groove to limit the moving distance of the telescopic clamping piece in the telescopic hook fixing seat.

By last, can prevent that flexible fastener from the distance overlength that stretches out in flexible couple fixing base from, influence the fastness of its locking, can prevent in addition that flexible fastener from following the roll-off in the flexible couple fixing base.

Optionally, an arc part is formed at the front end of the telescopic clamping piece above the second U-shaped clamping groove, so that when equipment is installed, the second U-shaped clamping groove is conveniently clamped in the square hole of the guide rail; and the second U-shaped groove of the telescopic clamping piece and the protruding tail part of the telescopic hook fixing seat form a circular structure at the bottom of the closed space locking guide rail.

Optionally, a non-return gasket is arranged in the sliding clamping piece, the non-return gasket is fixedly connected with a spring gasket in a mutually attached mode, and the other end of the first compression spring is abutted against the spring gasket.

Furthermore, a first column body extends out of one end of the sliding clamping piece close to the first compression spring towards the direction of the retaining gasket, and the first compression spring is sleeved outside the first column body; the retaining gasket and the spring gasket are provided with first cylindrical through holes for the first cylinder to pass through.

From above, the setting position of first compression spring can be confirmed to the stopping gasket, can be better the normal work of assurance first compression spring and the stable performance of function. The first column body is arranged and can be inserted into the column-shaped through hole, the first compression spring can be sleeved outside the first column body, a compression path of the first compression spring can be further determined, the maximization of function exertion is guaranteed, and the accuracy of the direction of the transmitted force is further guaranteed.

Optionally, a second cylinder is arranged at the tail part of the telescopic hook, and the second compression spring is sleeved outside the second cylinder;

and a second cylindrical through hole for the second cylinder to pass through is formed in the telescopic hook fixing seat.

By last, the utility model discloses an whether install firmly through the dismantlement hole can observe equipment in the collision couple of installing on the guide rail, and flexible couple passes through the spring telescoping device and realizes automatic dismouting, need not to operate it alone during the equipment dismouting. Due to the design of the spring and the sliding groove, the telescopic hook enables the equipment to be well suitable for the situation that the distance difference between the guide rails is large. Additionally, the utility model discloses an install couple on the guide rail and possess following beneficial effect at least:

1. the hook of the utility model can directly detect whether the equipment is firmly installed or not, and ensure the safety of the equipment after installation;

2. use the utility model discloses a couple can realize the automatic assembly disassembly of flexible couple one side, especially is used for needing quick assembly disassembly's equipment, can save a large amount of time.

3. The telescopic hook enables the equipment to be well adapted to the situation of larger distance difference of the guide rails, thereby reducing the requirements on the production and assembly tolerance of the guide rails.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following detailed description is given in conjunction with the preferred embodiments, together with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.

FIG. 1 is an assembly view of the bump hook of the present invention;

FIG. 2 is a cross-sectional view of the bump hook of the present invention;

FIG. 3 is an exploded view of the bump hook of the present invention;

FIG. 4 is an assembly view of the telescopic hook of the present invention;

FIG. 5 is a cross-sectional view of the retractable hook of the present invention;

FIG. 6 is an exploded view of the telescopic hook of the present invention;

FIG. 7 is a schematic structural view of the collision hook and the telescopic hook of the present invention installed on the equipment;

fig. 8 is a schematic structural view of the guide rail of the present invention;

FIG. 9 is a perspective view of the apparatus mounted on a rail by means of a collision hook and a telescopic hook;

FIG. 10 is a side view of the apparatus mounted on a rail by means of a bump hook and a telescopic hook;

FIG. 11 is a top view of FIG. 10;

FIG. 12 is a schematic view showing the relative positions of the detachment hole of the collision hook and the waist-shaped hole of the device;

fig. 13 is a schematic view of a three-dimensional structure of the telescopic hook of the present invention mounted on a guide rail;

FIG. 14 is a schematic view of the installation process of the collision hook and the telescopic hook of the present invention;

fig. 15 is an enlarged view of a portion a in fig. 14.

The device comprises a 100-collision hook, a 200-telescopic hook, a 1-collision hook fixing seat, a 2-sliding clamping piece, a 21-first guide rail, a 22-second guide rail, a 23-assembling edge, a 24-square hole, a 3-backstop gasket, a 4-first compression spring, a 5-spring gasket, a 6-damping gasket, a 7-telescopic hook fixing seat, an 8-telescopic clamping piece, a 9-second compression spring, a 10-positioning pin, a 30-dismounting hole, a 31-waist-shaped hole and a 40-strip-shaped sliding groove.

Detailed Description

Other aspects, features and advantages of the present invention will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, which form a part of the specification, illustrating by way of example the principles of the invention. In the referenced drawings, the same or similar components in different drawings are denoted by the same reference numerals.

It should be noted that the descriptions relating to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

As shown in fig. 1 to 15, the utility model discloses a couple is applied to on four angles of equipment, make equipment realize convenient dismouting on the guide rail, this couple is including installing collision couple 100 and the flexible couple 200 in the equipment both sides respectively, the guide rail is including parallel arrangement's each other first guide rail 21 and second guide rail 22, this first guide rail 21 and second guide rail 22 are close to collision couple 100 and flexible couple 200 setting respectively, and can evenly be equipped with two at least square holes 24 respectively on being close to this first guide rail 21 and second guide rail 22's the assembly border 23, the bottom of guide rail is circular structure. Correspondingly, at least two collision hooks 100 and two telescopic hooks 200 can be arranged, and the square holes 24 can be used for the collision hooks 100 or the telescopic hooks 200 to be randomly selected to be hung and leaned on one hand, and can also ensure the stability of hanging and leaning on the other hand.

In addition, the first guide rail 21 and the second guide rail 22 may be respectively disposed near opposite sides of the aforementioned equipment, and correspondingly, the collision hooks 100 and the expansion hooks 200 may be respectively disposed at the opposite sides of the equipment uniformly. The opposite two sides of the equipment are locked, and the collision hooks 100 and the telescopic hooks 200 are uniformly hung and arranged, so that the stability and locking firmness of the equipment can be further ensured.

As shown in fig. 1 to 3, the utility model discloses a collision couple 100 includes collision couple fixing base 1, slide fastener 2, stopping gasket 3, first compression spring 4, spring shim 5 and shock attenuation gasket 6, and collision couple fixing base 1 meets the square casing that encloses for roof and the bottom plate that can be set up by four curb plates and relative setting of relative setting, and slide fastener 2 sliding connection is in the inside of collision couple fixing base 1 to, the tip that is close to the guide rail at collision couple fixing base 1 has the first U type draw-in groove of opening up. The damping gasket 6 is arranged at the bottom of the first U-shaped clamping groove and used for achieving a damping effect when the guide rail is clamped into the first U-shaped clamping groove. First compression spring 4 sets up in the inside of collision couple fixing base 1, and the one end of first compression spring 4 can paste the setting mutually on the inner wall of collision couple fixing base 1, and its other end and slide fastener 2 looks butt can promote forward through first compression spring 4's elasticity and slide fastener 2 blocks the locking in first U type draw-in groove with the square hole 24 of guide rail.

In order to facilitate the easier clamping of the guide rail into the first U-shaped slot, an inclined surface is formed at one end of the sliding clip 2 away from the first compression spring 4, so that the bottom of the guide rail can easily slide into the first U-shaped slot through the inclined surface, and the sliding clip 2 can penetrate into the square hole 24 of the guide rail to lock the guide rail. And, be equipped with on the lateral wall that first U type draw-in groove is kept away from first compression spring 4 with the pointed end assorted through-hole of sliding card spare, can supply the pointed end of sliding card spare to insert, can make the butt locking of sliding card spare 2 and first U type draw-in groove more firm like this, guarantee the security of equipment fixing.

Additionally, the utility model discloses a bottom of slide fastener 2 has exposed disassembly hole 30, and after stirring the piece (like screwdriver or metal bar etc.) and inserting this disassembly hole 30, can overcome first compression spring 4's elastic force and make slide fastener 2 remove backward (the direction of keeping away from first U type draw-in groove), makes slide fastener 2 withdraw from the square hole 24 of guide rail in order to take off collision couple. In order to observe whether the sliding clip 2 rebounds to the right under the action of the first compression spring 4, that is, whether the sliding clip 2 seals the first U-shaped slot, a waist-shaped hole 31 corresponding to the detachment hole 30 is provided at the installation position of the collision hook on the device, and the length of the waist-shaped hole 31 is equal to the maximum stroke distance of the detachment hole 30, for example, as shown in fig. 12, when the detachment hole 30 reaches the leftmost position of the waist-shaped hole 31, it is described that the tip of the sliding clip 2 is completely inserted into the through hole of the first U-shaped slot, and at this time, the collision hook is firmly installed on the guide rail. Of course, the length of the waist-shaped hole 31 can be larger than the maximum travel distance of the dismounting hole 30, as long as the dismounting hole 30 can be observed to reach a certain designated position with a mark, and the slide fastener 2 can be ensured to reset and lock.

When the collision hook 100 is installed, the guide rail and the sliding clamping piece 2 interact, the sliding clamping piece 2 retreats under the action of force, and when the guide rail is clamped above the damping gasket 6, the sliding hook 2 rebounds and resets under the action of the spring force of the first compression spring 4 to lock the guide rail. Because whether the sliding clamping piece 2 rebounds to the place under the action of the spring force cannot be directly observed during actual installation, whether the hook resets and is locked can be judged by means of the position change of the dismounting hole 30 when the sliding clamping piece 2 moves.

As shown in fig. 4 to 6, the utility model discloses a flexible couple includes flexible couple fixing base 7, flexible fastener 8, second compression spring 9 and locating pin 10, like aforementioned collision couple fixing base 1, flexible couple fixing base 7 meets the square casing that encloses for roof and the bottom plate that also can be by four curb plates that set up relatively and set up relatively, and 8 sliding connection of flexible fastener have opening second U type draw-in grooves down in the inside of flexible couple fixing base 7, the front end of flexible fastener 8 (the tip that is close to the guide rail). Second compression spring 9 sets up in the inside of flexible couple fixing base 7, and the one end of second compression spring 9 can paste the setting mutually on the inner wall of flexible couple fixing base 7, and its other end and flexible fastener 8 looks butt when dismantling flexible couple from the guide rail, can promote flexible fastener 8 through second compression spring 9 before and make second U type draw-in groove stretch out flexible couple fixing base 7 so that the square hole 24 of guide rail is deviate from in the flexible couple automatically.

The tail of the telescopic clamping piece 8 is provided with a strip-shaped sliding groove 40, the side wall of the telescopic hook fixing seat 7 is provided with a positioning hole in a penetrating manner, the positioning hole is penetrated through by the positioning pin 10, the positioning hole and the strip-shaped sliding groove 40 are used for limiting the moving distance of the telescopic clamping piece 8 in the telescopic hook fixing seat 7, and the telescopic clamping piece 8 is prevented from sliding out of the telescopic hook fixing seat 7.

When the device is installed, in order to conveniently clamp the second U-shaped clamping groove in the square hole 24 of the guide rail, the front end of the telescopic clamping piece 8 is provided with an arc part above the second U-shaped clamping groove. It should be noted that the principle of the locking of the telescopic hook is that a U-shaped groove of the telescopic clamping piece 8 and a protruding tail (a small tail in fig. 4 to 6) of the telescopic hook fixing seat 7 are combined into a circular structure at the bottom of the locking guide rail of the enclosed space, specifically see fig. 10. In addition, the telescopic hook compensates the distance error between the two guide rails by means of the flexibility, and the compensation error range is within the small tail range of the telescopic hook fixing seat 7, within which the telescopic clamping piece 8 does not depart.

When the equipment is disassembled, the telescopic clamping piece 8 can be automatically ejected out under the elastic force of the second compression spring 9, so that the purpose of automatic unlocking is achieved. Meanwhile, the distance between the guide rails on the two sides is constant when the device is installed, and the second compression spring 9 is compressed back under the constraint of the fixed distance, so that the purpose of automatic locking is achieved.

Preferably, the utility model discloses a be equipped with aforementioned stopping gasket 3 in the slide fastener 2, fixedly connected with spring shim 5 is pasted mutually to stopping gasket 3, and aforementioned first compression spring 4's the other end butt is on this spring shim 5. One end of the sliding clamping piece 2 close to the first compression spring 4 extends out of the first column body towards the direction of the stopping gasket 3, the first compression spring 4 is sleeved outside the first column body, and the stopping gasket 3 and the spring gasket 5 are provided with first column-shaped through holes for the first column body to pass through. The setting position of the first compression spring 4 can be determined by arranging the retaining gasket with the cylindrical through hole, and the normal work and the stable function exertion of the first compression spring 4 can be better ensured.

Correspondingly, the afterbody of flexible couple is equipped with the second post body, and aforementioned second compression spring 9 cover is established outside the second post body, the inside of flexible couple fixing base 7 has the second columnar through-hole that supplies the second post body to pass. The tail of the telescopic hook can also be provided with a third cylinder arranged opposite to the second cylinder, and the long strip-shaped sliding groove 40 is formed on the third cylinder.

The cylinder and the cylindrical through hole are arranged, the compression spring is sleeved outside the cylinder, a compression path of the compression spring can be further determined, the maximization of the function is guaranteed, and the accuracy of the direction of the transmitted force is further guaranteed.

The method for mounting the hook mounted on the guide rail according to the present invention is briefly described below with reference to fig. 1 to 15 in conjunction with the above description of the technical features:

when the collision hook 100 is installed, the guide rail enters the first U-shaped clamping groove of the collision hook fixing seat 1, the sliding clamping piece 2 retreats under the extrusion action of the guide rail, and after the guide rail is installed in place, the sliding clamping piece 2 rebounds under the action of the first compression spring 4 and is clamped into the square hole 24 of the guide rail, so that the guide rail is firmly locked. When the collision hook is detached, a screwdriver or a metal rod is inserted from the detaching hole 30, the collision hook is removed by pushing along the direction of the waist-shaped hole 31 on the equipment and withdrawing the sliding hook 2 from the square hole 24 of the guide rail.

Special attention is paid to: because the two waist-shaped holes 31 are formed in the bottom of the equipment, the relative positions of the dismounting holes 30 and the waist-shaped holes 31 visually reflect whether the sliding hook rebounds in place or not to firmly fix the equipment on the guide rail (because in the scene, only the bottom of the equipment is visible during installation, and other directions cannot be observed, the position of the sliding hook can be judged only through the waist-shaped holes 31), if the sliding clamping piece 2 is located at the position shown in fig. 12, the sliding clamping piece rebounds in place, and if the sliding clamping piece is located at the other side of the waist-shaped hole 31, the equipment is not locked, and needs to be dismounted and operated again.

When the telescopic hook 200 is installed, the telescopic clamping piece 8 is clamped in the square hole of the guide rail as shown in the figure, an oblique upward force is given to equipment, the collision hook is locked when the telescopic clamping piece 8 retracts, and the telescopic clamping piece 8 is automatically and firmly fixed on the guide rail at the moment. When the equipment is disassembled, the collision hook is disassembled according to the method, and the telescopic clamping piece 8 automatically separates out under the action of the second compression spring 9 and the gravity of the equipment when one side of the equipment sinks, so that the equipment is taken down.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood that the invention is not limited thereto, and that various modifications and changes can be made by those skilled in the art without departing from the principles of the invention.

Claims (10)

1. A hook mounted on a guide rail is provided with a plurality of square holes distributed at equal intervals, and is characterized by comprising a collision hook and a telescopic hook which are respectively mounted on two sides of equipment;

the collision hook comprises a collision hook fixing seat fixedly connected with equipment and a sliding clamping piece connected to the inside of the collision hook fixing seat in a sliding manner, and the front end of the collision hook fixing seat is provided with a first U-shaped clamping groove with an upward opening;

a first compression spring which is abutted with the sliding clamping piece is arranged in the collision hook fixing seat and is used for pushing the sliding clamping piece forwards to clamp and lock the square hole of the guide rail in the first U-shaped clamping groove;

the telescopic hook comprises a telescopic hook fixing seat fixedly connected with equipment and a telescopic clamping piece connected to the inside of the telescopic hook fixing seat in a sliding manner, and the front end of the telescopic clamping piece is provided with a second U-shaped clamping groove with a downward opening;

the telescopic hook fixing seat is internally provided with a second compression spring which is abutted to the telescopic clamping piece and used for pushing the telescopic clamping piece forward to enable the second U-shaped clamping groove to extend out of the telescopic hook fixing seat so as to enable the square hole of the guide rail to be automatically separated when the telescopic hook is detached from the guide rail.

2. The rail-mounted hanger according to claim 1, wherein the slide fastener has a removal hole in a bottom portion thereof into which the driver is inserted, and the slider is moved backward against the elastic force of the first compression spring after being inserted into the removal hole, so that the slider is withdrawn from the square hole of the rail to remove the collision hanger.

3. The rail-mounted hanger according to claim 2, wherein the device has a slotted hole corresponding to the detaching hole at the mounting position of the crash hanger, and the slotted hole has a length equal to the maximum stroke distance of the detaching hole, for observing whether the slide card is rebounded to the position by the first compression spring.

4. A hanger as claimed in claim 1, wherein the end of the slide catch remote from the first compression spring is formed as an inclined surface to facilitate entry of the rail into the first U-shaped channel.

5. The rail-mounted hook according to claim 4, wherein a through hole into which the tip of the slider is inserted is provided on a side wall of the first U-shaped catching groove remote from the first compression spring.

6. A hook as claimed in claim 1, wherein the tail of the retractable clip is formed with an elongated slot, the sidewall of the holder has a positioning hole, and the positioning pin passes through the positioning hole and the elongated slot to limit the distance of the retractable clip moving in the holder.

7. A hook mounted on a guide rail as claimed in claim 1, wherein a circular arc portion is formed at the front end of the telescopic clamping piece above the second U-shaped clamping groove, so that the second U-shaped clamping groove can be conveniently clamped in the square hole of the guide rail when equipment is mounted;

and the second U-shaped groove of the telescopic clamping piece and the protruding tail part of the telescopic hook fixing seat form a circular structure at the bottom of the closed space locking guide rail.

8. A hanger as claimed in claim 1, wherein the sliding member has a retaining washer disposed therein, the retaining washer is fixedly connected to a spring washer, and the other end of the first compression spring abuts against the spring washer.

9. The hook mounted on the guide rail according to claim 8, wherein one end of the sliding fastener close to the first compression spring extends to a direction of the retaining gasket to form a first column body, and the first compression spring is sleeved outside the first column body;

the retaining gasket and the spring gasket are provided with first cylindrical through holes for the first cylinder to pass through.

10. A hook mounted on a guide rail as claimed in claim 1, wherein the tail of the telescopic hook is provided with a second cylinder, and the second compression spring is sleeved outside the second cylinder;

and a second cylindrical through hole for the second cylinder to pass through is formed in the telescopic hook fixing seat.

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