Power assisting device for fitness equipment

Abstract

The utility model belongs to the technical field of fitness equipment, and particularly relates to a fitness equipment power assisting device which comprises barbell stands, two cross beams fixedly connected between the two barbell stands, a bench press stool fixedly connected to one sides of the cross beams, a soft cushion fixedly connected to the bench press stool, and two mutually symmetrical levers rotationally connected to the two barbell stands respectively. A second sliding rail is arranged at the end, away from the bench press stool, of each lever, a second sliding block is slidably connected into each second sliding rail, a mounting rod is fixedly connected between the two second sliding blocks, a set of weight stacks are connected to the mounting rod in a sleeving mode, and fixing buckles used for fixing the positions of the weight stacks are fixedly connected to the positions, located at the two ends of the set of weight stacks, of the mounting rod respectively. The two barbell stands are respectively and fixedly connected with a plurality of groups of hangers, and the outer side of one barbell stand is fixedly connected with a controller. By arranging the weight stack as a balance weight, assistance is provided during bench press exercise of a user by utilizing the lever principle, and the assistance can be changed by adjusting the position of the weight stack, so that exercise is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of fitness equipment, in particular to a power-assisting device for fitness equipment. Background Art

[0002] The bench press, also known as the bench press, is a multi-joint, compound exercise that particularly targets the pectoralis major and minor muscles, the anterior deltoids, the triceps, and the elbows. It's considered one of the three golden exercises in fitness. To perform the bench press, the exerciser lies supine on a bench with their knees bent and feet planted on the floor. They grip a barbell slightly wider than their shoulders, with their arms extended and their head and neck straight. After inhaling, they slowly lower the barbell to their chest. Once the barbell lightly touches their chest, they push it back up while exhaling. Because the barbell bench press is a free-weight exercise, it carries significant risks. When performed alone, the exerciser can reach exhaustion. Without protection or safety equipment, the exerciser is at risk of being struck by the barbell, which can be life-threatening. Fear of exhaustion and subsequent injury from the barbell can lead to ineffective bench presses, leading to a reluctance to use heavy weights, resulting in poor results.

[0003] The Chinese patent with authorization announcement number CN208081751 U discloses a bench press device with power-assisting and protective functions, including a safety protection device, a power-assisting device, a bench press bench for lying flat, and a bench press frame. The bench press frame is connected to one end of the bench press bench, and the full protection device is installed on the bench press frame and the bench press bench. The height of the safety protection device is level with the chest height of a fitness person lying flat on the bench press bench. When a fitness person performs bench press training alone and becomes exhausted, the fitness person can step on the pedal to raise the push rod and assist in pushing up the barbell. When the fitness person is unable to push up the barbell with the power-assisting device, the barbell can be put down, and the barbell will be placed on the safety bracket to prevent the fitness person from being hit by the barbell. It plays a safety protection role for the fitness person and can assist the fitness person in training alone to achieve better fitness results.

[0004] However, the above has the following shortcomings:

[0005] 1. In actual use, the use of bench press fitness equipment will usually require the barbell plates to be replaced as needed during multiple sets of exercises. However, when exercising alone or in a reverse direction, the barbell plates need to be repeatedly replaced, which is inconvenient to use.

[0006] 2. In actual use, when a person is lying down, there is no support for the force application position. At this time, stepping on the pedal with the barbell pressing on the push rod will not only fail to support the barbell, but will cause the pedal to exert a large reaction force, causing the person to slide on the bench press, and it will not play a protective role.

[0007] 3. In actual use, the user may easily cause the barbell to tilt when pushing the barbell due to exhaustion or misaligned force application, which may easily cause danger to the user. The above patent cannot effectively support the tilted barbell. Utility Model Content

[0008] The present invention overcomes the shortcomings of the prior art and solves the technical problem of ensuring that the barbell always remains level with the bottom surface by providing a lever, thereby preventing the barbell from tipping over due to a misaligned center during exercise. The lever is rotatably arranged and cooperates with the first slider to slide within the first slide rail without affecting the normal movement of the bench press exercise. The weight plate is provided to serve as a counterweight, and the rotation axis of the lever is used as a fulcrum to provide assistance to the user during the bench press exercise by utilizing the principle of leverage. The amount of assistance can be changed by adjusting the position of the weight plate. When the axis of the mounting rod coincides with the rotation axis of the lever, no assistance is provided to facilitate exercise. The electromagnetic push cylinder quickly releases the connection between the threaded connection sleeve and the second slider, so that the weight plate quickly moves to the farthest end of the lever under the tension of the strong spring. After the second slider passes through the ratchet box, it is locked by the ratchet teeth, so that the weight plate cannot move further toward the barbell plate. Therefore, the lever principle causes one end of the barbell plate to tilt up, avoiding pressure on the user and causing injury.

[0009] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fitness equipment power-assisting device, including a barbell rack, two cross beams fixedly connected between the two barbell racks, a bench press bench fixedly connected to one side of the cross beam, a soft cushion fixedly connected to the bench press bench, two symmetrical levers rotatably connected to the two barbell racks, each lever away from the bench press bench is provided with a second slide rail, each second slide rail is slidably connected to a second slider, a mounting rod is fixedly connected between the two second sliders, a group of counterweight plates is sleeved and connected to the mounting rod, and fixing buckles for fixing the position of the counterweight plates are fixedly connected to the mounting rod at both ends of a group of counterweight plates, and multiple groups of hanging racks are fixedly connected to the two barbell racks, and a controller is fixedly connected to the outside of one of the barbell racks.

[0010] Each of the levers is provided with a first slide rail at one end close to the bench press bench, and the lever is fixedly connected to a first end cover at the end of the first slide rail, a first slider is slidably connected in each of the first slide rails, a barbell rod is fixedly connected between two of the first sliders, two ends of the barbell rod pass through two first sliders and are fixedly connected to two groups of barbell plates, the lever is provided with a bend at the rotation connection with the barbell rack, and the axis of the mounting rod can coincide with the rotation axis of the lever.

[0011] A lead screw is rotatably connected in each second slide rail, and each lever is fixedly connected to a second end cover at the opening of the second slide rail. Each lead screw passes through the corresponding second end cover and is rotatably connected to the second end cover. A threaded connection sleeve is sleeved in each second slider and is threadedly connected to the lead screw. Tensions are provided on both sides of the end of each threaded connection sleeve extending out of the second slider. Each second slider is provided with an installation groove at the corresponding position of the tenon, and each second slider is fixedly connected to an electromagnetic push cylinder at the corresponding position of the tenon. The extended end of each electromagnetic push cylinder is fixedly connected to a card slidably connected to the second slider, and each card can be stuck between the tenon and the second slider.

[0012] The outer side of each second end cover is fixedly connected to a shell rotatably connected to the screw, the part of each screw extending into the shell is fixedly connected to a worm gear, and each shell is rotatably connected to a worm that meshes with the worm gear. The outer side of each lever is fixedly connected to a motor frame, and each motor frame is fixedly connected to a motor. The power output end of each motor is transmission-connected to a motor rod, and each motor rod extends into the corresponding shell and is fixedly connected to the corresponding worm gear.

[0013] A strong spring surrounding the outside of the lead screw is connected between each second end cover and the corresponding second slider. Openings are respectively provided on the upper and lower sides of the end of each lever close to the second end cover. A ratchet box is fixedly connected to the surface of each lever at a position corresponding to the opening. A ratchet extending into the opening is rotatably connected to the inside of each ratchet box, and a spring is provided between the inner wall of each ratchet box and the ratchet.

[0014] A slide rail is fixedly connected to the bottom of the bench press bench, and a plurality of pillars are fixedly connected between the slide rail and the bench press bench. The end of the slide rail away from the barbell rack is slidably connected to a slide seat, and two pedals are symmetrically distributed and fixedly connected on both sides of the slide seat. A foot switch is fixedly connected to each of the pedals. A plurality of pin holes are evenly distributed on the side wall of the slide rail, and a pin that can be connected to the pin hole is inserted on the slide seat.

[0015] In summary, compared with the prior art, the beneficial effects of the present invention are:

[0016] (1) By setting a lever, it is possible to ensure that the barbell always remains level with the bottom surface, thereby preventing the user from tipping over due to the barbell not being centered during exercise. The lever is rotated and cooperates with the first slider to slide in the first slide rail, which does not affect the normal bench press exercise.

[0017] (2) By setting up a weight plate, it can be used as a counterweight, using the rotation axis of the lever as a fulcrum, and using the principle of leverage to provide assistance when the user performs bench press exercises, and the amount of assistance can be changed by adjusting the position of the weight plate. When the axis of the mounting rod coincides with the rotation axis of the lever, there is no assistance to facilitate exercise.

[0018] (3) The electromagnetic push cylinder quickly releases the connection between the threaded connection sleeve and the second slider, so that the weight plate quickly moves to the farthest end of the lever under the tension of the strong spring, and the second slider is stuck by the ratchet box after passing through the ratchet box so that the weight plate will no longer move in the direction close to the barbell plate, thereby causing one end of the barbell plate to tilt up under the principle of leverage to avoid oppression on the user and causing injury. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional schematic diagram of this patent.

[0020] Figure 2 for Figure 1 A partial enlarged view of point C in the middle.

[0021] Figure 3 This is a side view of the patent.

[0022] Figure 4 for Figure 3 Stereoscopic cross-sectional view at AA in the middle.

[0023] Figure 5 for Figure 4 A partial enlarged view of point E in the middle.

[0024] Figure 6 for Figure 3 A three-dimensional cross-sectional view of the middle BB.

[0025] Figure 7 This is a structural diagram of the lever of this patent.

[0026] Figure 8 for Figure 7 A partial enlarged view of point D in the middle.

[0027] Figure 9 It is a structural diagram of the threaded connection sleeve and the second slider.

[0028] Explanation of reference signs: barbell stand 10; bench press 11; cushion 12; support column 13; slide rail 14; pin hole 15; slide 16; pedal 17; foot switch 18; latch 19; lever 20; first slide rail 21; first end cover 22; first sliding block 23; barbell bar 24; barbell plate 25; second slide rail 26; lead screw 27; second sliding block 28; mounting rod 29; weight plate 30; motor 31; motor stand 32; motor rod 33; housing 34; worm 35; worm wheel 36; strong spring 37; second end cover 38; cross beam 39; controller 40; hanger 41; ratchet box 42; opening 43; ratchet 44; reed 45; fixing buckle 46; threaded connection sleeve 47; mounting groove 48; clamping lug 49; card 50; electromagnetic push cylinder 51. DETAILED DESCRIPTION

[0029] In order to make the person in the technical field better understand the utility model scheme, the following will combine the drawings in the embodiment of the utility model, and the technical scheme in the embodiment of the utility model is clearly and completely described.

[0030] As shown in Figure 1-9 A fitness equipment power assisting device, comprising a barbell stand 10, two barbell stands 10 are fixedly connected with two cross beams 39, one side of the two cross beams 39 is fixedly connected with a bench press 11, the bench press 11 is fixedly connected with a cushion 12, two sides of the two barbell stands 10 close to each other are rotatably connected with two mutually symmetrical levers 20, one end of each lever 20 close to the bench press 11 is provided with a first slide rail 21, the end of each lever 20 at the first slide rail 21 is fixedly connected with a first end cover 22, a first sliding block 23 is slidably connected in each first slide rail 21, the two first sliding blocks 23 are fixedly connected with a barbell bar 24, the two ends of the barbell bar 24 extending out of the two first sliding blocks 23 are fixedly connected with a group of barbell plates 25, one side of the two barbell stands 10 close to the barbell bar 24 is fixedly connected with a plurality of hangers 41.

[0031] By setting the lever 20, the barbell bar 24 can always keep horizontal with the bottom surface, thereby avoiding the problem that the user is in danger due to the barbell turning over when the center is not centered during exercise, and the lever 20 is rotatably arranged and cooperates with the first sliding block 23 to slide in the first slide rail 21, which will not affect the normal bench press exercise action.

[0032] As shown in Figure 3-6As shown in Figure 8, a second slide rail 26 is provided at one end of each lever 20 away from the bench press 11, and a second end cover 38 is fixedly connected to the end of each lever 20 at the second slide rail 26. A second slider 28 is slidably connected in each second slide rail 26, and a mounting rod 29 is fixedly connected between the two second sliders 28. A plurality of weight plates 30 are evenly distributed on the mounting rod 29, and two fixing buckles 46 are fixedly connected to the mounting rod 29 at both sides of the weight plates 30, and the axis of the mounting rod 29 can coincide with the rotation axis of the lever 20.

[0033] The counterweight plate 30 is provided to serve as a counterweight, and the rotation axis of the lever 20 is used as a fulcrum to provide assistance to the user when performing bench press exercises using the principle of leverage. In addition, the amount of assistance can be changed by adjusting the position of the counterweight plate 30. When the axis of the mounting rod 29 coincides with the rotation axis of the lever 20, there is no assistance to facilitate exercise.

[0034] like Figure 1 、 3 -4 and 9, a lead screw 27 is rotatably connected to the inside of the second slide rail 26, a threaded connection sleeve 47 threadedly connected to the lead screw 27 is sleeved in the second slider 28, the outer side of the second end cover 38 is fixedly connected to the housing 34, one end of the lead screw 27 extending through the second end cover 38 into the housing 34 is fixedly connected to a worm gear 36, a motor rod 33 is rotatably connected to the housing 34, a worm 35 meshing and transmission-connected to the worm gear 36 is fixedly connected to the motor rod 33, a motor frame 32 is fixedly connected to the outside of each lever 20, each motor frame 32 is fixedly connected to a motor 31, and the power output end of each motor 31 is transmission-connected to the motor rod 33.

[0035] By setting the lead screw 27 to be threadedly connected to the threaded connecting sleeve 47 and coordinating the meshing transmission of the worm wheel 36 and the worm 35, the second slider 28 can be driven to move, thereby adjusting the position of the counterweight plate 30 to achieve the effect of adjusting the power assistance.

[0036] like Figure 1-2 As shown, a slide rail 14 is fixedly connected to the bottom of the bench press bench 11, and a plurality of pillars 13 are fixedly connected between the slide rail 14 and the bench press bench 11. A slide seat 16 is slidably connected to the end of the slide rail 14 away from the barbell rack 10. A plurality of pin holes 15 are evenly distributed on the side wall of the slide rail 14, and a pin 19 that can be connected to the pin holes 15 is inserted on the slide seat 16. Two pedals 17 are symmetrically distributed and fixedly connected on both sides of the slide seat 16, and two foot switches 18 are respectively fixedly connected to the two pedals 17. A controller 40 is fixedly connected to the outside of the barbell rack 10.

[0037] The user can control the motor 31 by stepping on the two foot switches 18, so that the power assistance can be conveniently adjusted without using hands. When the user's physical strength decreases or the exercise weight needs to be increased, the user can adjust it without getting up, which is convenient for the user to exercise.

[0038] As Figure 5-7 Each threaded sleeve 47 is provided with a tenon 49 at the end of the second slider 28, and each second slider 28 is provided with a mounting slot 48 at the position corresponding to the tenon 49. Each second slider 28 is fixedly connected with an electromagnetic push cylinder 51 at the position corresponding to the tenon 49. The extended end of each electromagnetic push cylinder 51 is fixedly connected with a card 50 which is in sliding connection with the second slider 28. The card 50 is located between the tenon 49 and the second slider 28. The second slider 28 and the second end cover 38 are connected with a strong spring 37 which surrounds the outside of the lead screw 27. The lever 20 is provided with an opening 43 on both upper and lower sides. The lever 20 is fixedly connected with a ratchet box 42 at the position corresponding to the opening 43. The ratchet box 42 is rotatably connected with a ratchet 44. The inside of the ratchet box 42 and the ratchet 44 are provided with a reed 45.

[0039] When danger occurs, the electromagnetic push cylinder 51 can quickly release the combination of the threaded sleeve 47 and the second slider 28, so that the counterweight 30 quickly moves to the farthest end of the lever 20 under the tension of the strong spring 37. After passing through the ratchet 44, the second slider 28 is clamped by the ratchet 44, so that the counterweight 30 cannot move towards the direction of the barbell plate 25. Therefore, the barbell plate 25 is lifted at one end under the principle of the lever, so as to avoid pressing the user and causing injury.

[0040] In this embodiment, initially, the patent is connected with the power supply, and the foot switch 18, the motor 31 and the electromagnetic push cylinder 51 are electrically connected with the controller 40. The mounting rod 29 is located at the position coinciding with the rotation axis of the lever 20. The barbell rod 24 is hung on a group of hangers 41. Before the user exercises, the operator pulls out the pin 19 from the sliding seat 16 and the pin hole 15. According to the height of the user and the position after lying down, the sliding seat 16 and the pedal 17 are adjusted to the appropriate position. Then, the pin 19 is inserted into the sliding seat 16 and the pin hole 15 to fix the sliding seat 16, and the preparation operation is completed.

[0041] Afterwards, the user lies down and holds the barbell bar 24 with both hands, with both feet close to the two foot switches 18. The two foot switches 18 respectively control the forward and reverse rotation of the motor 31. Under the meshing transmission of the worm 35 and the worm wheel 36, and the threaded connection between the lead screw 27 and the threaded connecting sleeve 47, the second slider 28 can be stably driven to slide in the second slide rail 26, thereby adjusting the position of the weight plate 30. When the weight plate 30 is away from the barbell bar 24, it can provide assistance to the user for exercise under the principle of leverage. When the mounting rod 29 coincides with the rotation axis of the lever 20, the user fully bears the load of the barbell plate 25 for exercise. During the exercise, the user does not need to get up to replace the barbell plate 25. The weight can be changed by controlling the foot switch 18. When the physical strength decreases and the weight needs to be reduced, or when the warm-up is completed and the weight needs to be increased, it can be changed quickly and conveniently. It is easy to use.

[0042] After the user has adjusted the exact position of the weight plate 30, the user removes the barbell bar 24 from the hanger 41 with or without providing assistance, and performs bench press exercises. Due to the rotation of the lever 20, the first slider 23 slides freely in the first slide rail 21, which will not affect the normal progress of the bench press action and the exercise. Moreover, since the lever 20 limits the two ends of the barbell bar 24, the barbell bar 24 will not fall over due to uneven force applied by the user, thereby protecting the safety of the user.

[0043] When the user is exhausted and unable to perform the bench press, and danger is about to occur, the user steps on the two foot switches 18 with both feet at the same time. The controller 40 receives a signal and quickly controls the electromagnetic push cylinder 51 to extend, pushing the card 50 out of between the tenon 49 and the second slider 28, so that the threaded connection sleeve 47 and the second slider 28 are released, and under the tension of the strong spring 37, the second slider 28 and the weight plate 30 quickly move to the farthest end of the lever 20. When the second slider 28 contacts the ratchet 44, the ratchet 44 is squeezed and pushed into the ratchet box 42. After the second slider 28 passes through the ratchet 44, the ratchet 44 will pop out again under the elasticity of the spring 45 and jam the second slider 28, so that the second slider 28 can no longer approach the direction of the barbell plate 25. Under the action of the lever moving away, the barbell bar 24 and one end of the barbell plate 25 are tilted upward, effectively preventing the barbell bar 24 from oppressing the user and causing danger.

[0044] The above-mentioned foot switch 18, motor 31, controller 40, electromagnetic push cylinder 51, etc. are mature existing technologies and will not be described in detail herein.

[0045] As used in the specification and claims, certain terms have particular meanings. Those of skill in the art will understand that one or more embodiments described herein can use terminology particular to certain technologies. It is not intended that the description be limited to the embodiments described herein, but rather that the present application be given the broadest possible interpretation within its scope, consistent with the teachings provided herein and the patent statutes. As used in the specification and claims, the singular forms "a," "an" and "the" include plural references unless the context clearly dictates otherwise. "Approximately" means within 10% of the value stated.

[0046] It is to be understood that the terminology "including", "containing", or any other reflection are intended to be open-ended and to mean that other items not specifically named are also contended, without limitation. The use of "including" or "containing" does not limit the item to the complete listing of the items recited, but rather is intended to be inclusive of other items that are substantially equivalent to those listed.

[0047] The above specification and description have shown and described several preferred embodiments of the application, but it is understood that the application is not limited to the exact details of construction or the arrangement of parts as described herein, but that the same can be modified in various ways, and that other embodiments can be used, without departing from the spirit and scope of the application. Changes and modifications can be made in the design, arrangement, composition and construction of the application without departing from the spirit and scope thereof, and it is intended to cover all such changes and modifications by the scope of the appended claims.

Claims

1. A fitness equipment power-assisting device, characterized in that: The invention comprises a barbell rack (10), two crossbeams (39) are fixedly connected between the two barbell racks (10), a bench press (11) is fixedly connected to one side of the crossbeam (39), a soft cushion (12) is fixedly connected to the bench press (11), two symmetrical levers (20) are rotatably connected to the two barbell racks (10), and a second slide rail (26) is provided at one end of each lever (20) away from the bench press (11), and a second lever (26) is slidably connected to the inside of each second slide rail (26). Two sliders (28), a mounting rod (29) is fixedly connected between the two second sliders (28), a group of counterweight plates (30) is sleeved and connected on the mounting rod (29), and fixing buckles (46) for fixing the position of the counterweight plates (30) are fixedly connected at both ends of the group of counterweight plates (30) on the mounting rod (29), and a plurality of hanging racks (41) are fixedly connected to the two barbell racks (10), and a controller (40) is fixedly connected to the outside of one of the barbell racks (10).

2. A fitness equipment power-assisting device according to claim 1, characterized in that: Each of the levers (20) is provided with a first slide rail (21) at one end close to the bench press (11); the lever (20) is fixedly connected to a first end cover (22) at the end of the first slide rail (21); a first slider (23) is slidably connected in each of the first slide rails (21); a barbell rod (24) is fixedly connected between the two first sliders (23); both ends of the barbell rod (24) pass through the two first sliders (23) and are fixedly connected to two groups of barbell plates (25); a bend is provided at the rotation connection between the lever (20) and the barbell rack (10); and the axis of the mounting rod (29) can coincide with the rotation axis of the lever (20).

3. The power-assisting device for fitness equipment according to claim 1, characterized in that: A lead screw (27) is rotatably connected in each second slide rail (26), and each lever (20) is fixedly connected to a second end cover (38) at the opening of the second slide rail (26). Each lead screw (27) passes through the corresponding second end cover (38) and is rotatably connected to the second end cover (38). A threaded connection sleeve (47) threadedly connected to the lead screw (27) is sleeved in each second slider (28), and each end of the threaded connection sleeve (47) extending out of the second slider (28) is provided with a tenon (49) on both sides. Each second slider (28) is provided with a mounting groove (48) at a position corresponding to the tenon (49), and each second slider (28) is fixedly connected to an electromagnetic push cylinder (51) at a position corresponding to the tenon (49). The extended end of each electromagnetic push cylinder (51) is fixedly connected to a card (50) slidably connected to the second slider (28), and each card (50) can be stuck between the tenon (49) and the second slider (28).

4. A fitness equipment power-assisting device according to claim 3, characterized in that: The outer side of each second end cover (38) is fixedly connected to a housing (34) that is rotatably connected to the lead screw (27); the portion of each lead screw (27) that extends into the housing (34) is fixedly connected to a worm gear (36); a worm (35) that is rotatably connected to the worm gear (36) is rotatably connected to the inside of each housing (34); the outer side of each lever (20) is fixedly connected to a motor frame (32); each motor frame (32) is fixedly connected to a motor (31); the power output end of each motor (31) is transmission-connected to a motor rod (33); each motor rod (33) extends into the corresponding housing (34) and is fixedly connected to the corresponding worm gear (35).

5. The power-assisting device for fitness equipment according to claim 3, characterized in that: A strong spring (37) surrounding the outer side of the lead screw (27) is connected between each second end cover (38) and the corresponding second slider (28); openings (43) are respectively provided on the upper and lower sides of one end of each lever (20) close to the second end cover (38); a ratchet box (42) is fixedly connected to the surface of each lever (20) at a position corresponding to the opening (43); a ratchet (44) extending into the opening (43) is rotatably connected in each ratchet box (42); and a spring (45) is provided between the inner wall of each ratchet box (42) and the ratchet (44).

6. The fitness equipment power-assisting device according to claim 1, characterized in that: The bottom of the bench press bench (11) is fixedly connected to a slide rail (14), and a plurality of pillars (13) are fixedly connected between the slide rail (14) and the bench press bench (11). The end of the slide rail (14) away from the barbell rack (10) is slidably connected to a slide seat (16), and two pedals (17) are symmetrically distributed and fixedly connected on both sides of the slide seat (16). Each of the pedals (17) is fixedly connected to a foot switch (18). A plurality of pin holes (15) are evenly distributed on the side wall of the slide rail (14), and a pin (19) capable of connecting with the pin hole (15) is plugged into the slide seat (16).

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