Hidden pedals and bicycles

Abstract

The present invention discloses a concealable pedal and a bicycle, wherein the concealable pedal comprises an outer crank tube, an inner crank tube which can be installed in the outer crank tube, and a pedal connected to one end of the inner crank tube away from the outer crank tube, wherein the inner crank tube is rotatably arranged in the outer crank tube, and a fastening assembly is arranged on the outer side of the outer crank tube for fastening the connection between the inner crank tube and the outer crank tube after the inner crank tube is rotated to a preset position. The concealable pedal of the present invention can be used to hide the pedal in a plane parallel to a bicycle frame when the pedal is not in use, thereby saving the space occupied by the bicycle when the bicycle is not in use.

Description

Technical Field

[0001] The invention relates to the technical field of transportation tools, and in particular to a concealable pedal and a bicycle. Background Art

[0002] As urban traffic becomes increasingly congested and environmental pollution becomes more and more serious, people are increasingly favoring green and environmentally friendly modes of travel. Bicycles, as a green and environmentally friendly means of transportation, have been widely used. Many cities have promoted urban public bicycle rental service projects to encourage citizens to use green means of transportation.

[0003] The pedals on existing bicycles extend out of the sides of the bicycle and, together with the handlebars, make it difficult to minimize the bicycle when it is not in use. Therefore, folding or hiding the pedals has been a challenge for many years. There are currently several ways to achieve the above purpose, namely by folding the pedals or cranks along different numbers of axes. However, when the pedals are folded along the axes, the thickness of the pedals and the related bearing system are on the outer surface of the crank (first obliquely outward), which means that the pedals and the related bearing system still occupy a certain distance, failing to minimize the space occupied by the pedals on the outer side of the crank.

[0004] In view of the above reasons, it is necessary to propose a new concealable pedal that can further reduce the space occupied by the pedal outside the crank. Summary of the invention

[0005] The main purpose of the present invention is to provide a concealable pedal and a bicycle, aiming to further reduce the space occupied by the pedal outside the crank and reduce the space occupied by the bicycle when not in use.

[0006] To achieve the above-mentioned purpose, the concealable pedal proposed in the present invention includes a crank outer tube, a crank inner tube that can be installed in the crank outer tube, and a pedal connected to one end of the crank inner tube away from the crank outer tube. The crank inner tube is rotatably arranged in the crank outer tube, and a fastening assembly is arranged on the outside of the crank outer tube for fastening the connection between the crank inner tube and the crank outer tube after the crank inner tube is rotated to a preset position.

[0007] Preferably, the fastening assembly includes a fastening handle, a cam pad and a pull rod, two opposite side surfaces of the fastening handle close to one end of the cam pad form two spaced parallel cams, the cam pad is arranged on the outer circumferential surface of the crank outer tube, one end of the pull rod is rotatably connected to the two cams through a pin shaft to form an eccentric wheel structure, a first positioning hole is provided on the cam pad, and a side of the cam pad relative to the fastening handle forms an arc surface matching the cam shape, and the other end of the pull rod is fixedly connected to the crank inner tube and the crank outer tube through the first positioning hole of the cam pad, the second positioning hole of the pin shaft, the third positioning hole of the crank outer tube and the fourth positioning hole of the crank inner tube in sequence.

[0008] Preferably, the crank outer tube is threadedly connected to the crank inner tube, the inner wall of the crank outer tube is provided with an internal thread, and the outer wall of the crank inner tube is provided with an external thread matching the internal thread.

[0009] Preferably, the other end of the pull rod is provided with a thread; the fastening assembly also includes a first locking top block arranged in the crank inner tube, and the first locking top block is provided with a threaded hole; the fourth positioning hole of the crank inner tube extends along its circumferential direction to form a first slide groove; the other end of the pull rod is threadedly connected to the threaded hole of the first locking top block from the first positioning hole of the cam pad, the second positioning hole of the pin shaft, the third positioning hole of the crank outer tube and the first slide groove of the crank inner tube in sequence.

[0010] Preferably, the first locking top block is cylindrical.

[0011] Preferably, the fourth positioning hole of the crank inner tube extends along the longitudinal direction of the crank inner tube to form a second slide groove, and the fastening assembly also includes a second locking top block arranged in the crank inner tube, and a threaded hole is opened on the second locking top block; the other end of the pull rod is threadedly connected to the threaded hole of the second locking top block from the first positioning hole of the cam pad, the second positioning hole of the pin shaft, the third positioning hole of the crank outer tube and the second slide groove of the crank inner tube in sequence; the inner side of the crank outer tube is provided with a third slide groove in which the second locking top block can be installed, and the radius of the cam is greater than the depth of the second locking top block embedded in the third slide groove, so that when the handle is released, the top surface of the second locking top block is lower than the top surface of the second slide groove.

[0012] Preferably, the second locking top block includes a protrusion that cooperates with the second sliding groove and the third sliding groove.

[0013] Preferably, the length extension direction of the handle extends radially along the crank outer tube; the other end of the pull rod is sequentially penetrated by the first positioning hole of the cam pad and the second positioning hole of the pin shaft; the crank outer tube is provided with a through first mounting hole, and the crank inner tube is provided with a through second mounting hole, and the handle facing the crank outer tube is provided with a locking pin hole, and the fastening assembly also includes a locking pin assembly, and the locking pin assembly includes an adjusting nut, a retaining ring, a locking pin and a return spring assembled in sequence. The locking pin assembly is used to press the locking pin into the second mounting hole to lock the crank outer tube and the crank inner tube when the locking pin hole presses the adjusting nut when the handle moves toward the crank outer tube; when the handle moves in a direction away from the crank outer tube, the return spring causes the locking pin to disengage from the second mounting hole, unlocking the connection between the crank outer tube and the crank inner tube, so that the crank inner tube rotates in the crank outer tube along with the sliding groove provided on the crank outer tube.

[0014] Preferably, the handle has the same curvature as the outer circumference of the crank outer tube, so that the handle can fit on the crank outer tube when it moves to the stop end.

[0015] In addition, to achieve the above-mentioned object, the present invention also provides a bicycle, which includes the concealable pedal as described above.

[0016] In the technical solution of the present invention, the concealable pedal comprises an outer crank tube, an inner crank tube that can be installed in the outer crank tube, and a pedal connected to one end of the inner crank tube away from the outer crank tube, the inner crank tube is rotatably arranged in the outer crank tube, and a fastening assembly is arranged on the outer side of the outer crank tube to fasten the connection between the inner crank tube and the outer crank tube after the inner crank tube rotates to a preset position. The concealable pedal of the present invention can be used to hide the pedal in a plane parallel to the bicycle frame when the pedal is not in use, thereby saving the space occupied by the bicycle when the bicycle is not in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 FIG. 4 is a schematic diagram of a concealable pedal according to an embodiment of the present invention.

[0019] Figure 2 for Figure 1 Exploded diagram.

[0020] Figure 3 Figure 1 An exploded view of another embodiment.

[0021] Figure 4 FIG. 4 is a schematic diagram of a concealable pedal according to an embodiment of the present invention.

[0022] Figure 5 for Figure 4 Schematic diagram from another perspective.

[0023] Figure 6 for Figure 4 Exploded diagram.

[0024] Description of Figure Numbers:

[0025] Label name Label name 1 Crank outer tube 8 pedal 2 Crank inner tube 10 Locking pin hole 3 First locking top block 11 Adjusting nut 32 Second locking top block 12 Circlip 4 handle 13 Locking pin 5 Pin 14 Return spring 6 Cam spacers 15 First mounting hole 7 Tie rod 16 Second mounting hole 17 Sliding groove

[0026] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] The present invention provides a concealable pedal, aiming to further reduce the space occupied by the pedal 8 outside the crank, thereby reducing the space occupied by the bicycle when not in use.

[0033] Please refer to Figures 1 to 6 In one embodiment of the present invention, the concealable pedal comprises an outer crank tube 1, an inner crank tube 2 which can be installed in the outer crank tube 1, and a pedal 8 connected to an end of the inner crank tube 2 which is away from the outer crank tube 1. The inner crank tube 2 is rotatably arranged in the outer crank tube 1, and a fastening assembly is arranged on the outer side of the outer crank tube 1 to fasten the connection between the inner crank tube 2 and the outer crank tube 1 after the inner crank tube 2 is rotated to a preset position. The concealable pedal of the present invention can be used to hide the pedal 8 in a plane parallel to the bicycle frame when the pedal 8 is not in use, thereby saving the space occupied by the bicycle.

[0034] At present, most pedals are folded along an axis perpendicular to the axis of the crank. However, the thickness of the pedal and the related bearing system easily occupy a distance of about 3 cm on the outer surface of the crank (firstly obliquely outward), while the technical solution of the present invention can obtain at least 3 cm of extra space.

[0035] In this embodiment, the crank inner tube 2 is an L-shaped structure, one end of the crank inner tube 2 is installed in the crank outer tube 1, and the other end of the crank inner tube 2 is fixedly installed with a pedal 8. The crank inner tube 2 is rotatably installed in the crank outer tube 1, so that when the pedal 8 is not needed, the crank inner tube 2 can be rotated to a certain angle so that the pedal 8 is rotated to a plane parallel to the bicycle frame. In addition, the concealable pedal also includes a fastening assembly, which is used to fasten the crank inner tube 2 to the crank outer tube 1 after the crank inner tube 2 is rotated to a preset position.

[0036] Among them, the fastening component can be a screw hole opened in the crank inner tube 2 and the crank outer tube 1, and the crank inner tube 2 and the crank outer tube 1 are fixed by screws. When the pedal 8 needs to be rotated, the screw is removed from the corresponding crank inner tube 2 and crank outer tube 1. After the pedal is rotated, the screw is re-fixed into the corresponding screw hole to fix the position of the pedal 8 after rotation.

[0037] Of course, in other embodiments, the fastening assembly may also be other structures that can fasten the connection between the crank inner tube 2 and the crank outer tube 1 after the crank inner tube 2 rotates to a preset position.

[0038] In another preferred embodiment, the fastening assembly includes a fastening handle 4, a cam gasket 6 and a pull rod, the two opposite side surfaces of the fastening handle 4 close to one end of the cam gasket 6 form two spaced parallel cams, the cam gasket 6 is arranged on the outer peripheral surface of the crank outer tube 1, one end of the pull rod is rotatably connected between the two cams through a pin shaft 5 to form an eccentric wheel structure, a first positioning hole is provided on the cam gasket 6, and the cam gasket 6 forms an arc surface matching the cam shape on a side relative to the fastening handle 4, and the other end of the pull rod is fixedly connected to the crank inner tube 2 and the crank outer tube 1 through the first positioning hole of the cam gasket 6, the second positioning hole of the pin shaft 5, the third positioning hole of the crank outer tube 1 and the fourth positioning hole of the crank inner tube 2 in sequence.

[0039] In this embodiment, the pull rod is pushed into the fourth positioning hole of the crank inner tube 2 and the third positioning hole of the crank outer tube 1 by rotating the handle 4. The length extension direction of the handle 4 is along the axial length direction of the crank outer tube 1, so that the handle 4 fits on the crank outer tube 1 after being tightened, thereby reducing the space occupied by the handle 4 on both sides of the crank outer tube 1. When it is necessary to rotate the pedal 8, the handle 4 is rotated upward to disconnect the pull rod from the crank outer tube 1. At this time, the pull rod can be taken out from the crank outer tube 1 and the crank inner tube 2, and the crank inner tube 2 and the pedal 8 are rotated to a preset angle, and the pull rod is inserted into the corresponding holes of the crank inner tube 2 and the crank outer tube 1, and the handle 4 is continued to be rotated until the pull rod is pressed into the corresponding position.

[0040] The crank outer tube 1 is threadedly connected to the crank inner tube 2 , the inner wall of the crank outer tube 1 is provided with an internal thread, and the outer wall of the crank inner tube 2 is provided with an external thread matching the internal thread.

[0041] Furthermore, the other end of the pull rod is provided with a thread; the fastening assembly also includes a first locking top block 3 arranged in the crank inner tube 2, and a threaded hole is opened on the first locking top block 3; the fourth positioning hole of the crank inner tube 2 extends along its circumferential direction to form a first slide groove; the other end of the pull rod is threadedly connected to the threaded hole of the first locking top block 3 from the first positioning hole of the cam pad 6, the second positioning hole of the pin shaft 5, the third positioning hole of the crank outer tube 1 and the first slide groove of the crank inner tube 2 in sequence.

[0042] In this embodiment, the first locking top block 3 is cylindrical.

[0043] Reference Figure 1 and Figure 2 , the pedal 8 is threadedly connected to the crank inner tube 2, and the threaded inner tube is also threadedly connected to the threaded outer tube. A fastening assembly is arranged on the outer circumferential surface of the threaded outer tube, and the fastening assembly mainly consists of a handle 4, a cam pad 6 and a pull rod, and forms an eccentric wheel structure in structure. The fastening structure is used to realize the quick release of the connection between the threaded outer tube and the threaded inner tube. The fastening structure also includes a first locking top block 3 arranged in the crank inner tube 2, and the first locking top block 3 can ensure the disassembly and fastening of the crank inner tube 2 and the crank outer tube 1 under the action of the fastening assembly.

[0044] It should be noted that a first slide groove is provided on the crank inner tube 2. When the crank inner tube 2 is rotated, the first slide groove on the crank inner tube 2 rotates along the pull rod, thereby rotating the crank inner tube 2 and the pedal 8 on the crank inner tube 2 to a position where the crank inner tube 2 can be hidden. The first slide groove on the crank inner tube 2 extends 90 degrees along the circumferential direction.

[0045] Specifically, the hiding process of the concealable pedal under the above structure is: Figure 1 When the pedal 8 is in the state, move the handle 4 in the direction away from the crank outer tube 1. At this time, the connection between the pull rod and the crank inner tube 2 and the first locking top block 3 will become loose. At this time, the first slide groove on the crank inner tube 2 can be rotated ninety degrees along the pull rod, thereby hiding the pedal 8 above the crank outer tube 1.

[0046] Preferably, the fourth positioning hole of the crank inner tube 2 extends along the longitudinal direction of the crank inner tube 2 to form a second slide groove, and the fastening assembly also includes a second locking top block 32 arranged in the crank inner tube 2, and a threaded hole is opened on the second locking top block 32; the other end of the pull rod is threadedly connected to the threaded hole of the second locking top block 32 from the first positioning hole of the cam pad 6, the second positioning hole of the pin shaft 5, the third positioning hole of the crank outer tube 1 and the second slide groove of the crank inner tube 2 in sequence; the inner side of the crank outer tube 1 is provided with a third slide groove on which the second locking top block 32 can be installed, and the radius of the cam is greater than the depth of the second locking top block 32 embedded in the third slide groove, so that when the handle 4 is released, the top surface of the second locking top block 32 is lower than the top surface of the second slide groove.

[0047] In this embodiment, the second locking top block 32 includes a protrusion that cooperates with the second sliding groove and the third sliding groove.

[0048] Reference Figure 1 and Figure 3 In this embodiment, the fastening assembly further includes a second locking top block 32, the second locking top block 32 has a protrusion, the outer circumferential surface of the crank inner tube 2 is provided with a protrusion that cooperates with the protrusion of the second locking top block 32, and the inner wall of the crank outer tube 1 is provided with a third slide groove that can cooperate with the protrusion of the second locking top block 32. The connection between the crank inner tube 2 and the crank outer tube 1 is through the protrusion of the second locking top block 32 passing through the second slide groove of the crank inner tube 2, and embedded in the third slide groove of the crank outer tube 1 to fix the crank inner tube 2 on the crank outer tube 1.

[0049] It should be noted that the radius of the cam is greater than the depth of the second locking top block 32 embedded in the third sliding groove, so that when the handle 4 is released, the top surface of the second locking top block 32 is lower than the top surface of the second sliding groove.

[0050] Specifically, the process of hiding the pedal 8 under the above structure is: rotating the handle 4 in a direction away from the crank outer tube 1, at which time the connection between the pull rod and the second locking top block 32 becomes loose, and because the radius of the cam is greater than the depth of the second locking top block 32 embedded in the third slide groove, the protrusion of the second locking top block 32 is lower than the top surface of the second slider of the crank inner tube 2, and at this time the crank inner tube 2 can drive the pedal 8 thereon to rotate to the hidden position.

[0051] In another preferred embodiment, referring to Figures 4 to 6The length extension direction of the handle 4 extends along the radial direction of the crank outer tube 1; the other end of the pull rod is penetrated by the first positioning hole of the cam pad 6 and the second positioning hole of the pin shaft 5 in sequence; the crank outer tube 1 is provided with a through first mounting hole 15, and the crank inner tube 2 is provided with a through second mounting hole 16. The handle 4 is provided with a locking pin hole 10 on the side facing the crank outer tube 1, and the fastening assembly also includes a locking pin assembly, which includes an adjusting nut 11, a retaining ring 12, a locking pin 13 and a return spring 1 assembled in sequence. 4. The locking pin assembly is used to press the locking pin 13 into the second mounting hole 16 to lock the crank outer tube 1 and the crank inner tube 2 when the handle 4 moves toward the crank outer tube 1 and the locking pin hole 10 presses the adjusting nut 11; when the handle 4 moves in a direction away from the crank outer tube 1, the return spring 14 disengages the locking pin 13 from the second mounting hole 16, unlocking the connection between the crank outer tube 1 and the crank inner tube 2, so that the crank inner tube 2 rotates in the crank outer tube 1 along with the sliding groove 17 provided on the crank outer tube 1.

[0052] Preferably, the handle 4 has the same curvature as the outer circumference of the crank outer tube 1 , so that the handle 4 can fit on the crank outer tube 1 when it moves to the stop end.

[0053] Reference Figure 4 and Figure 5 In this embodiment, the handle 4 fits the outer axial surface of the crank outer tube 1 after being tightened, and in order to make the fit between the handle 4 and the crank outer tube 1 more compact, the side of the handle 4 that fits the crank outer tube 1 has the same curvature as the fitting part of the crank outer tube 1.

[0054] Specifically, the handle 4 is rotated in a direction away from the crank outer tube 1. After the rotation, the locking pin hole 10 on the handle 4 is released from the squeezing of the adjusting nut 11 in the crank inner tube 2 because it is away from the crank outer tube 1, so that the return spring 14 disengages the locking pin 13 from the corresponding hole position, releases the connection between the crank inner tube 2 and the crank outer tube 1, and then the crank inner tube 2 can be rotated to hide the pedal 8 to the corresponding position.

[0055] The present invention also provides a bicycle, comprising the concealable pedal as described above. Other components and operations of the bicycle according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here. Specifically, since the bicycle adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0056] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A concealable pedal, comprising an outer crank tube, an inner crank tube that can be installed in the outer crank tube, and a pedal connected to an end of the inner crank tube away from the outer crank tube, wherein the inner crank tube is rotatably arranged in the outer crank tube, and a fastening assembly is arranged on the outer side of the outer crank tube for fastening the connection between the inner crank tube and the outer crank tube after the inner crank tube rotates to a preset position, characterized in that: The fastening assembly includes a fastening handle, a cam pad, a pull rod and a locking top block arranged in the crank inner tube, the locking top block being provided with a threaded hole, and two opposite side surfaces of the fastening handle close to one end of the cam pad form two spaced parallel cams, the cam pad being arranged on the outer circumferential surface of the crank outer tube, one end of the pull rod being rotatably connected between the two cams by a pin shaft to form an eccentric wheel structure, a first positioning hole being provided on the cam pad, and a side of the cam pad relative to the fastening handle forms an arc surface matching the cam shape, and the other end of the pull rod passes through the first positioning hole of the cam pad, the second positioning hole of the pin shaft, the third positioning hole of the crank outer tube and the fourth positioning hole of the crank inner tube in sequence, and then is connected to the locking top block, so that the crank inner tube is fixedly connected to the crank outer tube.

2. The concealable pedal according to claim 1, characterized in that: The crank outer tube is threadedly connected to the crank inner tube, the inner wall of the crank outer tube is provided with an internal thread, and the outer wall of the crank inner tube is provided with an external thread matching the internal thread.

3. The concealable pedal according to claim 2, characterized in that: The other end of the pull rod is provided with a thread; the locking top block is the first locking top block; the fourth positioning hole of the crank inner tube extends along its circumferential direction to form a first slide groove; the other end of the pull rod is threadedly connected to the threaded hole of the first locking top block in sequence from the first positioning hole of the cam pad, the second positioning hole of the pin shaft, the third positioning hole of the crank outer tube and the first slide groove of the crank inner tube.

4. The concealable pedal according to claim 3, characterized in that: The first locking top block is cylindrical.

5. The concealable pedal according to claim 1, characterized in that: The fourth positioning hole of the crank inner tube extends along the longitudinal direction of the crank inner tube to form a second slide groove, and the locking top block is the second locking top block; the other end of the pull rod is threadedly connected to the threaded hole of the second locking top block from the first positioning hole of the cam pad, the second positioning hole of the pin shaft, the third positioning hole of the crank outer tube and the second slide groove of the crank inner tube in sequence; a third slide groove is provided on the inner side of the crank outer tube to cooperate with the installation of the second locking top block, and the radius of the cam is greater than the depth of the second locking top block embedded in the third slide groove, so that when the handle is released, the top surface of the second locking top block is lower than the top surface of the second slide groove.

6. The concealable pedal according to claim 5, characterized in that: The second locking top block includes a protrusion that cooperates with the second sliding groove and the third sliding groove.

7. A concealable pedal, comprising an outer crank tube, an inner crank tube that can be installed in the outer crank tube, and a pedal connected to an end of the inner crank tube away from the outer crank tube, wherein the inner crank tube is rotatably arranged in the outer crank tube, and a fastening assembly is arranged on the outer side of the outer crank tube for fastening the connection between the inner crank tube and the outer crank tube after the inner crank tube rotates to a preset position, characterized in that: The fastening assembly includes a fastening handle, a cam pad and a pull rod, two opposite side surfaces of the fastening handle close to one end of the cam pad form two spaced parallel cams, the cam pad is arranged on the outer peripheral surface of the crank outer tube, one end of the pull rod is rotatably connected to the two cams through a pin shaft to form an eccentric wheel structure, the cam pad is provided with a first positioning hole, and the pin shaft is provided with a second positioning hole; the other end of the pull rod is penetrated by the first positioning hole of the cam pad and the second positioning hole of the pin shaft in sequence; the crank outer tube is provided with a through first mounting hole, and the crank inner tube is provided with a through second mounting hole, and the handle faces the A locking pin hole is provided on one side of the crank outer tube, and the fastening assembly also includes a locking pin assembly, which includes an adjusting nut, a retaining ring, a locking pin and a return spring assembled in sequence, and the locking pin assembly is used to press the locking pin into the second mounting hole to lock the crank outer tube and the crank inner tube when the locking pin hole presses the retaining ring when the handle moves toward the crank outer tube; when the handle moves in a direction away from the crank outer tube, the return spring disengages the locking pin from the second mounting hole, unlocks the connection between the crank outer tube and the crank inner tube, so that the crank inner tube rotates in the crank outer tube along with the sliding groove provided on the crank outer tube.

8. The concealable pedal according to claim 7, characterized in that: The length extension direction of the fastening handle extends along the radial direction of the crank outer tube.

9. The concealable pedal according to claim 7, characterized in that: The handle has the same curvature as the outer circumference of the crank outer tube, so that the handle can fit on the crank outer tube when it moves to the stop end.

10. A bicycle, characterized in that: It comprises a concealable pedal as described in any one of claims 1 to 9.

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