Pedal structure
By designing a structure connecting the shaft and counterweight on the pedal of the bicycle, the pedal remains in a horizontal state when it is left to sit, the problem of pedal inclination in the prior art is solved, and the convenience and safety of riding are improved .
Patent Information
- Application Number
- CN202411597396.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-02-07
AI Technical Summary
In the prior art, the pedal plate of a bicycle is easily tilted when it is left to stand, and the user needs to adjust the pedal plate to a horizontal position before riding, which is inconvenient to use.
A pedal structure including a pedal, a housing, a connecting shaft and a counterweight block is designed. The counterweight block is placed between the pedal and the housing through the connecting shaft, and the gravity of the counterweight block is used to quickly return to the horizontal state in the inclined state.
Improves the convenience and safety of riding, ensures that the pedal remains stable during riding, reduces friction losses, and reduces maintenance costs.
Smart Images

Figure CN119389347A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field related to bicycles, and in particular to a pedal structure. Background Art
[0002] A bicycle, also known as a bike or a bicycle, is usually a small two-wheeled land vehicle. When people ride on it, they use pedals as power, and it is a green and environmentally friendly means of transportation. Bicycles can be used as an environmentally friendly means of transportation for travel and travel; more and more people use bicycles as fitness equipment for riding and traveling.
[0003] Chinese patent publication number: CN201158441Y, publication date 2008-12-03, discloses a full-circle force pedal for a bicycle, including a pedal shaft, the other end of the pedal shaft is fixedly connected to the inner ring of a ball bearing, the outer ring of the ball bearing is fixedly connected to the middle hole of the pedal plate, and a pedal rod is fixedly connected to the edges of the three directions of the outer side of the pedal plate, and the three pedal rods extend vertically outward from the pedal in parallel. The pedal plate is triangular, and the three pedal rods are respectively located at the three corners, and each pedal rod is covered with a soft rubber sleeve. The disadvantage of this patent is that the pedal plate is prone to tilt when it is stationary, and the user needs to adjust the pedal plate to a horizontal position before riding, which is inconvenient to use.
[0004] In summary, there is a need for a pedal structure that can improve riding convenience. Summary of the invention
[0005] The present invention aims to overcome the shortcomings of the prior art that a pedal board is prone to tilt when in a static state, and the user needs to adjust the pedal board to a horizontal position before riding, which is inconvenient to use, and provides a pedal structure that can improve the convenience of riding.
[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A pedal structure comprises a pedal, a shell is fixed on the bottom surface of the pedal, a connecting shaft and a counterweight are mounted on the shell, the connecting shaft and the shell are rotatably connected, the connecting shaft is placed between the pedal and the counterweight, the plane formed by the center of gravity of the counterweight and the center line of the connecting shaft is perpendicular to the pedal, and the connecting shaft and the counterweight are both detachably connected to the shell.
[0007] The entire pedal structure is installed on the bicycle through the connecting shaft. Through the gravity of the counterweight, the tilted pedal can quickly return to the horizontal state, which is convenient for the user to easily step on the pedal, improving the convenience of riding. At the same time, the weight on the pedal is increased due to the addition of the counterweight, which also improves the stability of the pedal during riding and improves the safety of riding. Through the detachable connection of the connecting shaft, the counterweight and the shell, the pedal structure is designed as a unit, and the parts are simple and easy to process. When a part of a certain part is damaged, it can be disassembled and replaced separately, avoiding the overall disassembly and replacement, greatly reducing the maintenance cost.
[0008] Preferably, groove 1 and groove 2 are respectively provided on both sides of the shell, a connecting through hole is provided between the bottom surface of groove 1 and the bottom surface of groove 2, one end of the connecting shaft is placed outside the shell, the other end of the connecting shaft passes through groove 1 and the connecting through hole in turn and is installed on the inner side of groove 2, bearing component 1 and bearing component 2 are sleeved on the connecting shaft, bearing component 1 is installed on the inner side of groove 1, and bearing component 2 is installed on the inner side of groove 2, and the connecting shaft is rotatably connected to the shell through bearing component 1 and bearing component 2. When installing the connecting shaft, just insert the connecting shaft into the connecting through hole, which has a simple structure, convenient operation and high assembly efficiency. Through the design of bearing component 1 and bearing component 2, the friction loss generated during the relative rotation between the connecting shaft and the shell is reduced, the rotation smoothness is improved, and the connecting shaft is also positioned and shock-absorbing.
[0009] Preferably, the bearing component 1 includes a bowl body 1, the bottom surface of the bowl body 1 is provided with a bowl hole 1 matching the connecting shaft, the bowl body 1 is placed on the bottom surface of the groove 1 and is mutually sleeved with the connecting shaft, the connecting shaft is provided with an annular shoulder, the annular shoulder is placed on the inner side of the groove 1, the opening of the annular shoulder is arranged opposite to the opening of the bowl body 1 and the two together form an annular cavity 1, and a plurality of balls 1 are arranged inside the annular cavity 1. When installing the bearing component 1, firstly, the bowl body is sleeved onto the connecting shaft and the bowl body 1 is moved to the position of the annular shoulder, so that the opening of the annular shoulder and the opening of the bowl body 1 together form an annular cavity 1, and then the balls 1 are placed in the annular cavity 1, and then the connecting shaft with the bearing component 1 is inserted through the groove 1 into the connecting through hole, and the bowl body 1 is pressed against the bottom surface of the groove 1. The structure is simple, easy to operate, and has high assembly efficiency. The structure is unitized, and damaged parts can be disassembled and replaced individually.
[0010] Preferably, the second bearing component includes a second bowl body, the bottom surface of the second bowl body is provided with a second bowl hole matching the connecting shaft, the second bowl body is placed on the bottom surface of the second groove and is mutually sleeved with the connecting shaft, the other end of the connecting shaft is provided with an external threaded portion, a bead plug block is threadedly connected to the external threaded portion, the inner side of the bead plug block faces the second bowl body and is provided with an annular groove, the annular groove and the opening of the second bowl body are arranged opposite to each other and the two together form an annular cavity two, a plurality of balls are arranged inside the second annular cavity, a fastening nut is also threadedly connected to the external threaded portion, the fastening nut is placed on the outer side of the bead plug block and a gasket is arranged between the two. When installing the bearing part 2, firstly sleeve the bowl body 2 onto the connecting shaft and move the bowl body 2 to the bottom surface of the groove 2, and put the ball 2 into the bowl body 2, then screw the ball plug block onto the external threaded portion at the other end of the connecting shaft, and make the annular groove on the ball plug block and the opening of the bowl body 2 together form an annular cavity 2, so that the ball 2 is placed in the annular cavity 2, and finally install the gasket on the outside of the ball plug block and tighten it with the fastening nut. The structure is simple, easy to operate, and has high assembly efficiency. The structure is designed as a unit, and damaged parts can be disassembled and replaced separately.
[0011] Preferably, the shell is also provided with a counterweight slot, the counterweight is placed in the counterweight slot and plugged therein, the opening of the counterweight slot and the opening of groove 2 are both located on the same side of the shell, and a cap is also installed on the shell, the cap and the shell are sealed and snap-fitted, the opening of the counterweight slot and the opening of groove 2 are both located on the inner side of the cap. The counterweight and the counterweight slot are assembled by plugging, which has a simple structure, convenient operation, high assembly efficiency, and a unitized structure design, so that damaged parts can be disassembled and replaced individually. By sealing the opening of groove 2 and the opening of the counterweight slot with the cap, the internal parts can be separated from external dust, moisture, etc., to prevent the internal parts from being disturbed and corroded, thereby increasing the service life.
[0012] Preferably, a plurality of limiting ribs are fixed on the inner wall of the counterweight slot, the limiting ribs are distributed in a ring shape with the center line of the counterweight slot as the center, and the ends of the limiting ribs are provided with transition chamfers, the transition chamfers are located at the end of the limiting ribs close to the opening of the counterweight slot. Through the design of the limiting ribs, the counterweight in the counterweight slot can be limited and fixed, the structural stability is improved, the collision between the counterweight and the inner wall of the counterweight slot during riding is avoided, and the role of protecting parts and reducing vibration is played.
[0013] Preferably, a strap fixing seat and a strap buckle are respectively provided on both sides of the pedal, and the strap buckle includes a buckle seat and a locking plate. The buckle seat is fixedly connected to the pedal, and flanges are fixed on both sides of the buckle seat. A fixing rod is fixedly connected between the two flanges. A fixing rod through hole matching the fixing rod is provided on the locking plate, and the locking plate is sleeved on the fixing rod through the fixing rod through hole and is rotatably connected thereto. A torsion spring is also provided between the locking plate and the buckle seat, and one end of the torsion spring is connected to the buckle seat, and the other end of the torsion spring is connected to the locking plate. A strap is fixedly connected to the strap fixing seat. After the user steps on the pedal, the strap can be wrapped around the foot and the end of the strap can be inserted into the gap between the buckle seat and the locking plate. The strap can be automatically locked by the torsional force of the torsion spring on the locking plate to prevent the user's foot from slipping off the pedal and causing an accident, thereby improving the safety of riding.
[0014] Preferably, the pedal is fixed with a guide frame opening 1 and a guide frame opening 2, which are respectively placed on the sides of the strap fixing seat and the strap buckle, and the locking plate is provided with locking teeth, which are placed on the side of the locking plate away from the guide frame opening 2. The guide frame opening 1 and the guide frame opening 2 play a guiding role in the binding process of the strap. After the end of the strap is inserted into the gap between the buckle seat and the locking plate, the torsion force of the torsion spring on the locking plate is used to automatically press the locking teeth on the locking plate onto the strap, thereby automatically locking the strap and improving the locking effect.
[0015] Preferably, a plurality of reinforcing plates are fixed at the connection between the pedal and the housing. The pedal and the housing are reinforced by the reinforcing plates, which greatly improves the strength and stability of the pedal.
[0016] Preferably, a plurality of protrusions are fixed on the top surface of the pedal, and the protrusions are provided with anti-skid patterns. The protrusions and the anti-skid patterns thereon increase the friction coefficient between the foot and the pedal, improve the anti-skid effect, and effectively avoid accidents caused by the foot slipping off the pedal during riding, thereby improving the safety of riding.
[0017] The beneficial effects of the present invention are: the convenience of riding is improved; the safety of riding is improved; the structure is designed in a unitized manner, the parts are simple and easy to process, and when parts of a certain part are damaged, they can be disassembled and replaced separately, avoiding overall disassembly and replacement, and greatly reducing maintenance costs; the structure is simple, the operation is convenient, and the assembly efficiency is high; the friction loss is reduced, the rotation smoothness is improved, and the positioning and shock absorption functions are provided; the internal parts can be separated from external dust, moisture, etc., to prevent the internal parts from being disturbed and corroded, and the service life is increased; the locking effect is improved; the strength and stability are improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 and Figure 2is a stereogram of the present invention; Figure 3 It is a front view of the present invention; Figure 4 yes Figure 3 Enlarged view of the middle AA; Figure 5 yes Figure 3 Enlarged view of the middle BB; Figure 6 is a top view of the present invention; Figure 7 yes Figure 6 Enlarged view of CC in the middle.
[0019] In the figure: 1. pedal, 2. shell, 3. connecting shaft, 4. counterweight, 5. groove 1, 6. groove 2, 7. connecting through hole, 8. bowl body 1, 9. annular cavity 1, 10. ball 1, 11. bowl body 2, 12. external threaded portion, 13. ball plug block, 14. annular cavity 2, 15. ball 2, 16. fastening nut, 17. gasket, 18. counterweight slot, 19. cap, 20. limiting rib, 21. strap fixing seat, 22. buckle seat, 23. locking plate, 24. flange, 25. fixing rod, 26. fixing rod through hole, 27. torsion spring, 28. guide frame mouth 1, 29. guide frame mouth 2, 30. locking teeth, 31. reinforcement plate, 32. bump, 33. anti-slip pattern. DETAILED DESCRIPTION
[0020] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.
[0021] like Figure 1 and Figure 2 In the embodiment described above, a pedal structure includes a pedal 1, and a shell 2 (plastic shell) is fixed on the bottom surface of the pedal 1. Figure 3 and Figure 4 As shown, a connecting shaft 3 and a counterweight 4 are installed on the shell 2, the connecting shaft 3 and the shell 2 are rotatably connected, the connecting shaft 3 is placed between the pedal 1 and the counterweight 4, the plane formed by the center of gravity of the counterweight 4 and the center line of the connecting shaft 3 is perpendicular to the pedal 1, and the connecting shaft 3 and the counterweight 4 are both detachably connected to the shell 2.
[0022] like Figure 3 and Figure 4As shown, groove 1 5 and groove 2 6 are respectively provided on both sides of the shell 2, and a connecting through hole 7 is provided between the bottom surfaces of groove 1 5 and groove 2 6. One end of the connecting shaft 3 is placed outside the shell 2, and the other end of the connecting shaft 3 passes through groove 1 5 and the connecting through hole 7 in sequence and is installed on the inner side of groove 2 6. Bearing component 1 and bearing component 2 are sleeved on the connecting shaft 3. Bearing component 1 is installed on the inner side of groove 1 5, and bearing component 2 is installed on the inner side of groove 2 6. The connecting shaft 3 is rotatably connected to the shell 2 through bearing component 1 and bearing component 2.
[0023] like Figure 3 and Figure 4 As shown, the bearing member 1 includes a bowl body 8 (steel bowl), the bottom surface of the bowl body 8 is provided with a bowl hole 1 matching the connecting shaft 3, the bowl body 8 is placed on the bottom surface of the groove 5 and is mutually sleeved with the connecting shaft 3, an annular shoulder is provided on the connecting shaft 3, the annular shoulder is placed on the inner side of the groove 5, the opening of the annular shoulder is arranged opposite to the opening of the bowl body 8 and the two together form an annular cavity 9, and a plurality of balls 10 (steel balls) are arranged inside the annular cavity 9.
[0024] like Figure 3 and Figure 4 As shown, the bearing component 2 includes a bowl body 11 (steel bowl), the bottom surface of the bowl body 11 is provided with a bowl hole 2 matching the connecting shaft 3, the bowl body 11 is placed on the bottom surface of the groove 6 and is mutually sleeved with the connecting shaft 3, and the other end of the connecting shaft 3 is provided with an external threaded portion 12, and a bead plug block 13 is threadedly connected to the external threaded portion 12, the inner side of the bead plug block 13 faces the bowl body 11 and is provided with an annular groove, the annular groove and the opening of the bowl body 11 are arranged opposite to each other and the two together form an annular cavity 14, a plurality of balls 15 (steel balls) are arranged inside the annular cavity 14, and a fastening nut 16 is also threadedly connected to the external threaded portion 12, and the fastening nut 16 is placed on the outer side of the bead plug block 13 and a gasket 17 is arranged between the two.
[0025] like Figure 3 and Figure 4 As shown, a counterweight slot 18 is also provided on the shell 2, and the counterweight 4 is placed in the counterweight slot 18 and plugged therein, and the opening of the counterweight slot 18 and the opening of the groove 2 6 are both located on the same side of the shell 2. A cap 19 is also installed on the shell 2, and the cap 19 and the shell 2 are sealed and clamped, and the opening of the counterweight slot 18 and the opening of the groove 2 6 are both located on the inner side of the cap 19.
[0026] like Figure 3 and Figure 4 , Figure 6 and Figure 7As shown, a plurality of limiting ribs 20 are fixed on the inner wall of the counterweight slot 18. The limiting ribs 20 are distributed in a ring shape with the center line of the counterweight slot 18 as the center. The ends of the limiting ribs 20 are provided with transition chamfers, which are placed at one end of the limiting ribs 20 close to the opening of the counterweight slot 18.
[0027] like Figure 6 As shown, a strap fixing seat 21 and a strap buckle are respectively provided on both sides of the pedal 1. The strap buckle includes a buckle seat 22 and a locking plate 23. The buckle seat 22 and the pedal 1 are fixedly connected (riveted fixedly), as shown in FIG. Figure 3 and Figure 5 As shown, flanges 24 are fixed on both sides of the buckle seat 22, and a fixing rod 25 (rivet) is fixedly connected between the two flanges 24. A fixing rod through hole 26 matching the fixing rod 25 is provided on the locking plate 23. The locking plate 23 is sleeved on the fixing rod 25 through the fixing rod through hole 26 and is rotatably connected thereto. A torsion spring 27 is also provided between the locking plate 23 and the buckle seat 22, and one end of the torsion spring 27 is connected to the buckle seat 22, and the other end of the torsion spring 27 is connected to the locking plate 23.
[0028] like Figure 6 As shown, a guide frame opening 1 28 and a guide frame opening 29 are fixed on the pedal 1, and the guide frame opening 1 28 and the guide frame opening 29 are respectively placed on the sides of the strap fixing seat 21 and the strap buckle, and a locking tooth 30 is provided on the locking plate 23, and the locking tooth 30 is placed on the side of the locking plate 23 away from the guide frame opening 29.
[0029] like Figure 2 As shown, a plurality of reinforcing plates 31 are fixed at the connection between the pedal 1 and the housing 2 .
[0030] like Figure 1 As shown, a plurality of protrusions 32 are fixed on the top surface of the pedal 1 , and anti-slip grooves 33 are provided on the protrusions 32 .
[0031] Installation process: First, install the bearing component 1 and the connecting shaft 3, first put the bowl body 8 onto the connecting shaft 3 and move the bowl body 8 to the position of the annular shoulder, so that the opening of the annular shoulder and the opening of the bowl body 8 together form an annular cavity 9, then put the ball 10 into the annular cavity 9, and then insert the connecting shaft 3 with the bearing component 1 through the groove 5 into the connecting through hole 7 (the other end of the connecting shaft 3 is placed in the groove 2 6), and press the bowl body 8 against the bottom surface of the groove 5. After that, the bearing part 2 is installed. The bowl body 2 11 is first sleeved onto the connecting shaft 3 and the bowl body 2 11 is moved to the bottom surface of the groove 2 6, and the ball 2 15 is placed in the bowl body 2 11. Then, the bead plug 13 is screwed onto the external threaded portion at the other end of the connecting shaft 3, and the annular groove on the bead plug 13 and the opening of the bowl body 2 11 together form an annular cavity 2 14, so that the ball 2 15 is placed in the annular cavity 2 14, and finally the gasket 17 is installed on the outside of the bead plug 13 and tightened by the fastening nut 16. Then, the counterweight 4 is inserted into the counterweight slot 18, and the opening of the groove 2 6 and the opening of the counterweight slot 18 are sealed by the cap 19.
[0032] Through the gravity of the counterweight 4 , the pedal 1 in an inclined state can be quickly restored to a horizontal state, making it convenient for the user to step on the pedal 1 easily.
[0033] The strap fixing seat 21 is fixedly connected with a strap. After the user steps on the pedal 1, the strap can be wrapped around the foot and the end of the strap can be inserted into the gap between the buckle seat 22 and the locking plate 23. The locking teeth 30 on the locking plate 23 are automatically pressed against the strap by the torsion force of the torsion spring 27 on the locking plate 23, thereby automatically locking the strap.
Claims
1. A pedal structure, characterized in that: The invention comprises a pedal (1), a shell (2) being fixed on the bottom surface of the pedal (1), a connecting shaft (3) and a counterweight (4) being mounted on the shell (2), the connecting shaft (3) and the shell (2) being rotatably connected, the connecting shaft (3) being arranged between the pedal (1) and the counterweight (4), the plane formed by the center of gravity of the counterweight (4) and the center line of the connecting shaft (3) being perpendicular to the pedal (1), and the connecting shaft (3) and the counterweight (4) being detachably connected to the shell (2).
2. A pedal structure according to claim 1, characterized in that: A groove 1 (5) and a groove 2 (6) are respectively provided on both sides of the housing (2); a connecting through hole (7) is provided between the bottom surfaces of the groove 1 (5) and the bottom surfaces of the groove 2 (6); one end of the connecting shaft (3) is placed outside the housing (2); the other end of the connecting shaft (3) passes through the groove 1 (5) and the connecting through hole (7) in sequence and is mounted on the inner side of the groove 2 (6); a bearing component 1 and a bearing component 2 are sleeved on the connecting shaft (3); the bearing component 1 is mounted on the inner side of the groove 1 (5); the bearing component 2 is mounted on the inner side of the groove 2 (6); the connecting shaft (3) is rotatably connected to the housing (2) via the bearing component 1 and the bearing component 2.
3. A pedal structure according to claim 2, characterized in that: The bearing member 1 comprises a bowl body 1 (8), the bottom surface of the bowl body 1 (8) is provided with a bowl hole 1 matching the connecting shaft (3), the bowl body 1 (8) is placed on the bottom surface of the groove 1 (5) and is sleeved with the connecting shaft (3), the connecting shaft (3) is provided with an annular shoulder, the annular shoulder is placed on the inner side of the groove 1 (5), the opening of the annular shoulder is arranged opposite to the opening of the bowl body 1 (8), and the two together form an annular cavity 1 (9), and a plurality of balls 1 (10) are arranged inside the annular cavity 1 (9).
4. A pedal structure according to claim 2, characterized in that: The bearing member 2 comprises a bowl body 2 (11), the bottom surface of the bowl body 2 (11) is provided with a bowl hole 2 matching the connecting shaft (3), the bowl body 2 (11) is placed on the bottom surface of the groove 2 (6) and is sleeved with the connecting shaft (3), the other end of the connecting shaft (3) is provided with an external threaded portion (12), a bead plug block (13) is threadedly connected to the external threaded portion (12), the inner side of the bead plug block (13) faces the bowl body 2 (11) and is provided with an annular groove, the annular groove and the opening of the bowl body 2 (11) are arranged opposite to each other and the two together form an annular cavity 2 (14), a plurality of balls 2 (15) are arranged inside the annular cavity 2 (14), a fastening nut (16) is also threadedly connected to the external threaded portion (12), the fastening nut (16) is arranged on the outer side of the bead plug block (13) and a gasket (17) is arranged between the two.
5. A pedal structure according to claim 4, characterized in that: The shell (2) is also provided with a counterweight slot (18), the counterweight (4) is placed in the counterweight slot (18) and plugged therein, the opening of the counterweight slot (18) and the opening of the second groove (6) are both located on the same side of the shell (2), and a cap (19) is also installed on the shell (2), the cap (19) and the shell (2) are sealed and snap-fitted, and the opening of the counterweight slot (18) and the opening of the second groove (6) are both located on the inner side of the cap (19).
6. A pedal structure according to claim 5, characterized in that: A plurality of limiting ribs (20) are fixed on the inner wall of the counterweight slot (18), the limiting ribs (20) being distributed in a ring shape with the center line of the counterweight slot (18) as the center, and transition chamfers are provided at the ends of the limiting ribs (20), the transition chamfers being located at one end of the limiting ribs (20) close to the opening of the counterweight slot (18).
7. A pedal structure according to any one of claims 1 to 5, characterized in that: A strap fixing seat (21) and a strap buckle are respectively provided on both sides of the pedal (1), and the strap buckle comprises a buckle seat (22) and a locking plate (23). The buckle seat (22) is fixedly connected to the pedal (1), and flanges (24) are fixedly provided on both sides of the buckle seat (22). A fixing rod (25) is fixedly connected between the two flanges (24). A fixing rod through hole (26) matching the fixing rod (25) is provided on the locking plate (23). The locking plate (23) is sleeved on the fixing rod (25) through the fixing rod through hole (26) and is rotatably connected thereto. A torsion spring (27) is also provided between the locking plate (23) and the buckle seat (22), and one end of the torsion spring (27) is connected to the buckle seat (22), and the other end of the torsion spring (27) is connected to the locking plate (23).
8. A pedal structure according to claim 7, characterized in that: The pedal (1) is fixed with a guide frame opening 1 (28) and a guide frame opening 2 (29), the guide frame opening 1 (28) and the guide frame opening 2 (29) are respectively arranged on the side of the strap fixing seat (21) and the strap buckle, and the locking plate (23) is provided with a locking tooth (30), and the locking tooth (30) is arranged on a side of the locking plate (23) away from the guide frame opening 2 (29).
9. A pedal structure according to any one of claims 1 to 5, characterized in that: A plurality of reinforcing plates (31) are fixed at the connection between the pedal (1) and the housing (2).
10. A pedal structure according to any one of claims 1 to 5, characterized in that: A plurality of protrusions (32) are fixed on the top surface of the pedal (1), and anti-slip grooves (33) are provided on the protrusions (32).
Citation Information
Patent Citations
Full-circumference force application pedal of the bicycle
CN201158441Y
Cited By
Binding type safety pedal device for bicycle
CN121404417A