A protective structure leg exercise device

By designing a leg exercise device that includes a mounting plate, support frame, squat bar, sliding collar, adjustment device, and limiting device, the safety problem of existing devices when simulating free weight squats is solved, and protection and stability are achieved during exercise.

CN116808525BActive Publication Date: 2025-10-24JIANGSU GOLDEN SUNSHINE SCI & EDUCATION EQUIP GRP
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Patent Information

Application Number
CN202310964219.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-08-01
Publication Date
2025-10-24
Estimated Expiration
2043-08-01

AI Technical Summary

Technical Problem

Existing leg exercise devices lack protection when simulating free-weight squats, leading to safety hazards during exercise.

Method used

A leg exercise device was designed, comprising a mounting plate, a support frame, a squat bar, a sliding collar, an adjustment device, a protective device, and a limiting device. Through the cooperation of the adjustment device and the limiting device, the movement trajectory of a free squat is simulated, and the position of the squat bar is quickly restricted when the exercise can no longer continue, providing protection.

Benefits of technology

This provides protection for the user during the simulated free squat, reduces safety risks during exercise, and improves the safety and stability of the exercise device.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application belongs to the technical field of protective structure, a protective structure leg exercise device, including mounting plate, support frame and deep squat rod, the mounting plate is equipped with support frame for placing deep squat rod, characterized in that, the deep squat rod is equipped with two sliding sleeves, two adjusting devices are arranged on the sliding sleeves, the adjusting devices slide on the protection device, the protection device is arranged on the mounting plate, a limiting device is arranged on the protection device, the protection device and the limiting device cooperate to limit the movement of the adjusting device, the stability of the mounting plate, the support frame and the protection device is reinforced, the deep squat rod is loaded, when the deep squat rod is lifted to do deep squat, the adjusting device and the sliding sleeve cooperate to adapt to the trajectory of lifting the deep squat rod, and the form of simulating free deep squat is achieved, when the deep squat rod cannot be lifted, the deep squat rod will quickly fall, and the deep squat rod drives the protection device and the limiting device through the adjusting device to limit the position of the fixed deep squat rod.
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Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of protective structures, and particularly relates to a leg exercise device with a protective structure. BACKGROUND

[0002] With the improvement of the quality of life, people gradually realize the importance of the body, and people start to go to gyms. Each equipment in the gym corresponds to different parts of the body for exercise. Some of them exercise the chest, shoulders, back and legs. If the spirit is not concentrated enough or the impact weight is too heavy and dangerous during the exercise process, the weight of the leg training is greater than that of other training, and the risk is the largest.

[0003] The existing leg exercise device is fixed stroke, which loses more comprehensive exercise when protecting people. SUMMARY

[0004] The present application relates to the technical field of protective structures, and particularly relates to a leg exercise device with a protective structure.

[0005] To achieve the above-mentioned purpose, the specific technical scheme of the leg exercise device with a protective structure is as follows:

[0006] A leg exercise device with a protective structure, comprising a mounting plate, a support frame and a deep squat rod, the mounting plate is provided with a support frame for placing the deep squat rod, the deep squat rod is provided with two sliding sleeves, the sliding sleeves are provided with two adjusting devices, the adjusting devices slide in the protection device, the protection device is arranged on the mounting plate, the protection device is connected with the limiting device, the protection device and the limiting device cooperate to limit the movement of the adjusting device;

[0007] The adjusting device comprises a first sliding seat, a first sliding hole, a first sliding block, a fixed sleeve and a moving rod, the first sliding seat slides on the protection device through the first sliding hole, the first sliding block slides on the first sliding seat, the fixed sleeve is arranged on the first sliding block, the moving rod slides on the fixed sleeve, the moving rod is arranged on the sliding sleeve, and the first sliding seat is provided with a limiting device for limiting the movement of the first sliding seat in cooperation with the protection device;

[0008] The limiting device comprises a second sliding groove, a second sliding block, a first spring and an upper inclined surface block, the second sliding groove is arranged in the first sliding seat, the second sliding block slides in the second sliding groove, the first spring is arranged between the second sliding block and the second sliding groove, and the second sliding block is provided with a plurality of upper inclined surface blocks, the upper inclined surface blocks cooperate with the protection device to limit the movement of the first sliding seat.

[0009] Further, the support frame comprises a support rod and a groove, and the support rod is provided with the groove for mounting the deep squat rod.

[0010] Further, the protection device comprises a fixed rod, a cooperation limiting device, a pulling device, a reset device, a driving device and a pressing device, the fixed rod is arranged on the mounting plate, the cooperation limiting device slides in the fixed rod, the pulling device is arranged in the fixed rod to push the cooperation limiting device to limit the movement of the adjusting device, the first sliding seat slides on the fixed rod, the driving device is arranged on the first sliding seat, the driving device drives the pressing device arranged in the fixed rod to slide, the pressing device presses the pulling device, and the reset device restores the position of the pressing device.

[0011] Further, the cooperation limiting device comprises a first pushing strip and a lower inclined surface block, the first pushing strip slides in the fixed rod, the first pushing strip is provided with a plurality of lower inclined surface blocks, the lower inclined surface blocks cooperate with the upper inclined surface blocks, and the pulling device drives the first pushing strip to move.

[0012] Further, the limiting device comprises a second sliding cavity, a limiting cavity, a connecting plate, a limiting block, a pushing ball end column, a pushing ring, a second spring, a pushing rod and an inclined surface groove, the second sliding cavity, the limiting cavity and the inclined surface groove are arranged in the mounting cylinder, the second sliding cavity and the limiting cavity are communicated, the connecting plate slides in the second sliding cavity, the connecting plate is provided with the limiting block, the limiting block enters the limiting cavity to limit the movement of the connecting plate, the connecting plate is provided with the pushing ball end column, the pushing ball end column slides on the pushing rod, the pushing ball end column is provided with the pushing ring, the pushing ring and the pushing rod are provided with the second spring, and the inclined surface groove enables the pushing ball end column to be shrunk into the inclined surface groove after being pressed by the mounting disc.

[0013] Further, the pulling device comprises a pushing plug, a pulling cavity, a pushing ring and a second spring, the pushing plug is arranged on the first pushing strip, the pulling cavity is arranged in the fixed rod, the pushing ring slides in the pulling cavity, the pushing plug is provided with the pushing ring and the second spring, and the second spring drives the pushing plug to move away from the first pushing strip.

[0014] Further, the reset device comprises a third sliding groove, a second pushing plate and a third spring, the third sliding groove is arranged on the fixed rod, the second pushing plate slides in the third sliding groove, the second pushing plate and the third sliding groove are provided with the third spring, and the second pushing plate is arranged on the pressing device.

[0015] Further, the driving device comprises a moving sleeve, a compression cavity, a pushing plug rod, a sliding piston and an exhaust hole, the moving sleeve is arranged on the first sliding seat, the moving sleeve is internally provided with the compression cavity for the sliding of the sliding piston, and the sliding piston is connected with the pressing device through the pushing plug rod.

[0016] Further, the pressing device comprises a pressing plate and a convex surface, the pressing plate is arranged on the pushing plug rod and the second pushing plate, the convex surface is arranged on the pressing plate, and the pressing plate presses away the lower inclined surface blocks from the upper inclined surface blocks through the convex surface.

[0017] The advantage of the present application is:

[0018] The present application installs the support frame 2 and the protection device 7 through the installation plate 1 and reinforces the stability of the device, the deep squat rod 3 increases the weight, the adjusting device 5 and the sliding sleeve ring 4 cooperate to adapt to the track of the deep squat rod 3 when lifting the deep squat rod 3 to do deep squat, which has reached the form of simulating free deep squat, when the deep squat rod 3 cannot be lifted, the deep squat rod 3 will quickly fall, the deep squat rod 3 quickly falls through the adjusting device 5 to drive the protection device 7 and the limiting device 6 to limit the position of the fixed deep squat rod 3. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the overall structure schematic diagram of the present application;

[0020] Figure 2 It is the cross-sectional structure schematic diagram of the present application;

[0021] Figure 3 It is the mechanism schematic diagram of the adjusting device of the present application;

[0022] Figure 4 It is the cross-sectional view of the adjusting device of the present application;

[0023] Figure 5 It is the structure schematic diagram of the protection device of the present application;

[0024] Figure 6 It is the cross-sectional view of the protection device of the present application;

[0025] Figure 7 It is Figure 6 Partial enlarged schematic diagram A;

[0026] Figure 8 It is Figure 6 Partial enlarged schematic diagram B;

[0027] Figure 9 It is Figure 6 Partial enlarged schematic diagram C;

[0028] Figure 10 It is the partial structure schematic diagram of the protection device of the present application

[0029] MARK DESCRIPTION OF FIGURE:

[0030] Mounting plate 1; support frame 2; support rod 2-1; groove 2-2; deep squat rod 3; sliding sleeve ring 4; adjusting device 5; first sliding seat 5-1; first sliding hole 5-2; first sliding block 5-3; fixed sleeve 5-4; moving rod 5-5; limiting device 6; second sliding groove 6-1; second sliding block 6-2; first spring 6-3; upper inclined surface block 6-4; protection device 7; fixed rod 7-1; matching limiting device 7-2; first push bar 7-2-1; lower inclined surface block 7-2-2; pulling device 7-3; second push bolt 7-3-1; pulling cavity 7-3-2; push ring 7-3-3; second spring 7-3-4; position device 7-4; third sliding groove 7-4-1; second push plate 7-4-2; third spring 7-4-3; driving device 7-5; moving sleeve 7-5-1; compression cavity 7-5-2; push plug rod 7-5-3; sliding piston 7-5-4; exhaust hole 7-5-5; extrusion device 7-6; extrusion plate 7-6-1; convex surface 7-6-2. DETAILED DESCRIPTION

[0031] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] As Figures 1-10 shown, a leg exercise device with a protection structure, comprising a mounting plate 1, a support frame 2 and a deep squat rod 3, the mounting plate 1 is provided with a support frame 2 for placing the deep squat rod 3, characterized in that the deep squat rod 3 is provided with two sliding sleeve rings 4, the sliding sleeve rings 4 are provided with two adjusting devices 5, the adjusting devices 5 slide in the protection device 7, the protection device 7 is arranged on the mounting plate 1, the protection device 7 is connected with the limiting device 6, and the protection device 7 and the limiting device 6 cooperate to limit the movement of the adjusting device 5.

[0034] The adjusting device 5 comprises a first sliding seat 5-1, a first sliding hole 5-2, a first sliding block 5-3, a fixed sleeve 5-4 and a moving rod 5-5, the first sliding seat 5-1 slides on the protection device 7 through the first sliding hole 5-2, the first sliding block 5-3 slides on the first sliding seat 5-1, the fixed sleeve 5-4 is arranged on the first sliding block 5-3, and the moving rod 5-5 slides on the fixed sleeve 5-4, the moving rod 5-5 is arranged on the sliding sleeve ring 4, and the first sliding seat 5-1 is provided with a limiting device 6 matched with the protection device 7 to limit the movement of the first sliding seat 5-1.

[0035] The limiting device 6 comprises a second sliding groove 6-1, a second sliding block 6-2, a first spring 6-3 and an upper inclined surface block 6-4, the second sliding groove 6-1 is arranged in the first sliding seat 5-1, the second sliding block 6-2 slides in the second sliding groove 6-1, the first spring 6-3 is arranged between the second sliding block 6-2 and the second sliding groove 6-1, and the second sliding block 6-2 is provided with a plurality of upper inclined surface blocks 6-4, and the upper inclined surface blocks 6-4 are matched with the protection device 7 to limit the movement of the first sliding seat 5-1.

[0036] The support frame 2 and the protection device 7 are installed on the mounting plate 1 to reinforce the stability of the device, the deep squat rod 3 increases the weight, the adjusting device 5 and the sliding sleeve ring 4 are matched to adapt to the track of holding up the deep squat rod 3 when the deep squat rod 3 is held up to achieve the form of simulating free deep squat, when the deep squat rod 3 cannot be held up, the deep squat rod 3 will quickly fall, and the deep squat rod 3 drives the protection device 7 and the limiting device 6 through the adjusting device 5 to limit the position of the fixed deep squat rod 3.

[0037] As shown in the accompanying drawings, Figures 1-10 The support frame 2 comprises a support rod 2-1 and a groove 2-2, and the groove 2-2 is arranged on the support rod 2-1 and used for installing the deep squat rod 3.

[0038] As shown in the accompanying drawings, Figures 1-10 The first sliding seat 5-1 slides on the protection device 7 through the first sliding hole 5-2, the first sliding block 5-3 slides on the first sliding seat 5-1, and the moving rod 5-5 slides in the fixed sleeve 5-4 to make the placed deep squat rod 3 simulate the moving track of free deep squat.

[0039] As shown in the accompanying drawings, Figures 1-10 When the protection device 7 is driven by the adjusting device 5, the protection device 7 is matched with the upper inclined surface block 6-4 to limit the movement of the adjusting device 5, thereby limiting the downward movement of the deep squat rod 3 and not limiting the upward movement.

[0040] As shown in the accompanying drawings, Figures 1-10As shown, the protective device 7 includes a fixed rod 7-1, a matching limiting device 7-2, a pulling device 7-3, a reset device 7-4, a driving device 7-5 and an extrusion device 7-6. The fixed rod 7-1 is arranged on the mounting plate 1, the matching limiting device 7-2 slides inside the fixed rod 7-1, the pulling device 7-3 is arranged inside the fixed rod 7-1 to push the matching limiting device 7-2 to limit the movement of the adjusting device 5, the first sliding seat 5-1 slides on the fixed rod 7-1, and the first sliding seat 5-1 is provided with a driving device 7-5. The driving device 7-5 drives the extrusion device 7-6 arranged inside the fixed rod 7-1 to slide, the extrusion device 7-6 squeezes the pulling device 7-3, and the reset device 7-4 restores the position of the extrusion device 7-6.

[0041] After the driving device 7-5 is quickly squeezed by the adjusting device 5, the driving device 7-5 will drive the pulling device 7-3 to move through the squeezing device 7-6, and the pulling device 7-3 will drive the matching limiting device 7-2 to make the matching limiting device 7-2 and the upper inclined block 6-4 cooperate to limit the downward movement of the first sliding seat 5-1. When the driving device 7-5 is squeezed non-quickly by the adjusting device 5, it cannot drive the matching limiting device 7-2 to cooperate with the upper inclined block 6-4.

[0042] Among them, such as Figures 1-10 As shown, the cooperation limiting device 7-2 includes a first push bar 7-2-1 and a lower inclined block 7-2-2. The first push bar 7-2-1 slides inside the fixed rod 7-1. A plurality of lower inclined blocks 7-2-2 are provided on the first push bar 7-2-1. The lower inclined blocks 7-2-2 cooperate with the upper inclined blocks 6-4, and the pulling device 7-3 drives the first push bar 7-2-1 to move.

[0043] Among them, such as Figures 1-10 As shown, the pulling device 7-3 includes a pushing bolt 7-3-1, a pulling cavity 7-3-2, a pushing ring 7-3-3 and a second spring 7-3-4. The pushing bolt 7-3-1 is arranged on the first pushing bar 7-2-1, the pulling cavity 7-3-2 is arranged inside the fixed rod 7-1, the pushing ring 7-3-3 slides inside the pulling cavity 7-3-2, and the pushing bolt 7-3-1 is provided with a pushing ring 7-3-3 and a second spring 7-3-4. The second spring 7-3-4 drives the pushing bolt 7-3-1 away from the first pushing bar 7-2-1.

[0044] Among them, such as Figures 1-10As shown, the reset device 7-4 includes a third sliding groove 7-4-1, a second push plate 7-4-2 and a third spring 7-4-3. The third sliding groove 7-4-1 is arranged on the fixed rod 7-1, and the second push plate 7-4-2 slides inside the third sliding groove 7-4-1. A third spring 7-4-3 is provided between the second push plate 7-4-2 and the third sliding groove 7-4-1, and the second push plate 7-4-2 is arranged on the extrusion device 7-6.

[0045] Among them, such as Figures 1-10 As shown, the driving device 7-5 includes a movable sleeve 7-5-1, a compression chamber 7-5-2, a push plug rod 7-5-3, a sliding piston 7-5-4 and an exhaust hole 7-5-5. The movable sleeve 7-5-1 is arranged on the first sliding seat 5-1. A compression chamber 7-5-2 for sliding of the sliding piston 7-5-4 is provided inside the movable sleeve 7-5-1. The sliding piston 7-5-4 is connected to the extrusion device 7-6 through the push plug rod 7-5-3.

[0046] After the pushing plug rod 7-5-3 is squeezed quickly, the gas inside the compression chamber 7-5-2 cannot be squeezed out quickly, and the pushing plug rod 7-5-3 will drive the movable sleeve 7-5-1 to move through the pushing plug rod 7-5-3, and the movable sleeve 7-5-1 will drive the extrusion plate 7-6-1 to move. When the pushing plug rod 7-5-3 is pushed slowly, the gas inside the compression chamber 7-5-2 can be discharged from the exhaust hole 7-5-5, so the movable sleeve 7-5-1 will move relative to the pushing plug rod 7-5-3 and the sliding piston 7-5-4 to ensure that the limiting device 7-2 and the limit device 6 are in a separated state to ensure normal exercise.

[0047] Among them, such as Figures 1-10 As shown, the extrusion device 7-6 includes an extrusion plate 7-6-1 and a convex surface 7-6-2. The extrusion plate 7-6-1 is arranged on the push plug rod and the second push plate 7-4-2, and the convex surface 7-6-2 is arranged on the extrusion plate 7-6-1. The extrusion plate 7-6-1 squeezes the lower inclined surface block 7-2-2 away from the upper inclined surface block 6-4 through the convex surface 7-6-2.

[0048] It will be understood that the present invention is described by way of some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A protective structure leg exercise device, comprising a mounting plate (1), a support frame (2) and a deep squat rod (3), the mounting plate (1) is provided with the support frame (2) for placing the deep squat rod (3), characterized in that, The deep squat rod (3) is provided with two sliding sleeves (4), the sliding sleeves (4) are provided with two adjusting devices (5), the adjusting devices (5) slide in the protection device (7), the protection device (7) is arranged on the mounting plate (1), the protection device (7) is connected with the limiting device (6), the protection device (7) and the limiting device (6) cooperate to limit the movement of the adjusting device (5); The adjusting device (5) comprises a first sliding seat (5-1), a first sliding hole (5-2), a first sliding block (5-3), a fixed sleeve (5-4) and a moving rod (5-5), the first sliding seat (5-1) slides on the protection device (7) through the first sliding hole (5-2), the first sliding block (5-3) slides on the first sliding seat (5-1), the fixed sleeve (5-4) is arranged on the first sliding block (5-3), the moving rod (5-5) slides on the fixed sleeve (5-4), the moving rod (5-5) is arranged on the sliding sleeve (4), and the first sliding seat (5-1) is provided with the limiting device (6) cooperating with the protection device (7) to limit the movement of the first sliding seat (5-1); The limiting device (6) comprises a second sliding groove (6-1), a second sliding block (6-2), a first spring (6-3) and an upper inclined surface block (6-4), the second sliding groove (6-1) is arranged in the first sliding seat (5-1), the second sliding block (6-2) slides in the second sliding groove (6-1), the first spring (6-3) is arranged between the second sliding block (6-2) and the second sliding groove (6-1), and the second sliding block (6-2) is provided with a plurality of upper inclined surface blocks (6-4); the upper inclined surface blocks (6-4) and the protection device (7) cooperate to limit the movement of the first sliding seat (5-1).

2. A protective structure leg exercise device according to claim 1, wherein The support frame (2) comprises a support rod (2-1) and a groove (2-2), and the support rod (2-1) is provided with the groove (2-2) for mounting the deep squat rod (3).

3. A protective structure leg exercise device according to claim 2, wherein The protection device (7) comprises a fixed rod (7-1), a cooperation limiting device (7-2), a pulling device (7-3), a reset device (7-4), a driving device (7-5) and an extrusion device (7-6), the fixed rod (7-1) is arranged on the mounting plate (1), the cooperation limiting device (7-2) slides in the fixed rod (7-1), the pulling device (7-3) is arranged in the fixed rod (7-1) and drives the cooperation limiting device (7-2) to limit the movement of the adjusting device (5), the first sliding seat (5-1) slides on the fixed rod (7-1), the first sliding seat (5-1) is provided with the driving device (7-5), the driving device (7-5) drives the extrusion device (7-6) arranged in the fixed rod (7-1) to slide, the extrusion device (7-6) extrudes the pulling device (7-3), and the reset device (7-4) restores the position of the extrusion device (7-6).

4. A protective structure leg exercise device according to claim 3, wherein The cooperation limiting device (7-2) comprises a first pushing strip (7-2-1) and a lower inclined surface block (7-2-2), the first pushing strip (7-2-1) slides inside the fixed rod (7-1), a plurality of lower inclined surface blocks (7-2-2) are arranged on the first pushing strip (7-2-1), the lower inclined surface blocks (7-2-2) cooperate with the upper inclined surface blocks (6-4), and the pulling device (7-3) drives the first pushing strip (7-2-1) to move.

5. A protective structure leg exercise device according to claim 4, wherein The pulling device (7-3) comprises a pushing bolt (7-3-1), a pulling cavity (7-3-2), a pushing ring (7-3-3) and a second spring (7-3-4), the pushing bolt (7-3-1) is arranged on the first pushing strip (7-2-1), the pulling cavity (7-3-2) is arranged inside the fixed rod (7-1), the pushing ring (7-3-3) slides inside the pulling cavity (7-3-2), the pushing ring (7-3-3) and the second spring (7-3-4) are arranged on the pushing bolt (7-3-1), and the second spring (7-3-4) drives the pushing bolt (7-3-1) to move away from the first pushing strip (7-2-1).

6. A protective structure leg exercise device according to claim 5, wherein, The reset device (7-4) comprises a third sliding groove (7-4-1), a second pushing plate (7-4-2) and a third spring (7-4-3), the third sliding groove (7-4-1) is arranged on the fixed rod (7-1), the second pushing plate (7-4-2) slides inside the third sliding groove (7-4-1), the third spring (7-4-3) is arranged between the second pushing plate (7-4-2) and the third sliding groove (7-4-1), and the second pushing plate (7-4-2) is arranged on the extrusion device (7-6).

7. A protective structure leg exercise device according to claim 6, wherein The driving device (7-5) comprises a moving sleeve (7-5-1), a compression cavity (7-5-2), a pushing plug rod (7-5-3), a sliding piston (7-5-4) and an exhaust hole (7-5-5), the moving sleeve (7-5-1) is arranged on the first sliding seat (5-1), the compression cavity (7-5-2) for sliding of the sliding piston (7-5-4) is arranged inside the moving sleeve (7-5-1), and the sliding piston (7-5-4) is connected with the pushing plug rod (7-5-3) and the extrusion device (7-6).

8. A protective structure leg exercise device according to claim 7, wherein The extrusion device (7-6) comprises an extrusion plate (7-6-1) and a convex surface (7-6-2), the extrusion plate (7-6-1) is arranged on the pushing plug rod and the second pushing plate (7-4-2), the convex surface (7-6-2) is arranged on the extrusion plate (7-6-1), and the extrusion plate (7-6-1) is extruded by the convex surface (7-6-2) so that the lower inclined surface blocks (7-2-2) move away from the upper inclined surface blocks (6-4).

Citation Information

Patent Citations

  • Deep squatting frame with height convenient to adjust and using method thereof

    CN112263808A

  • Barbell protection device capable of being automatically stuck

    CN112755452A