Pedals, cleats, pedal systems and bicycles

Abstract

The purpose of the present invention is to provide a pedal, a cleat, a pedal system, and a bicycle with which the cleat and the pedal can be coupled and uncoupled quickly and easily.　Provided is a pedal 10 that can be attached to and detached from a cleat, wherein the pedal 10 comprises a pedal base part, a pedal rotary connection part that is provided to the pedal base part and that connects to the cleat to enable rotation relative to the cleat with a rotational axis extending in the thickness direction of the pedal base part as a rotational center, and a plurality of pedal engagement parts that are provided to the pedal base part and that detachably engage with the cleat in the circumferential direction with the rotational axis as a rotational center, the plurality of pedal engagement parts being provided in positions joining the vertices of a polygon, and the rotational axis being passed through the inner region of the polygon.

Description

[Technical Field]

[0001] The present invention relates to pedals, cleats, pedal systems and bicycles. [Background technology]

[0002] BACKGROUND ART Conventionally, bicycles have been known in which cleats provided on shoes are connected to pedals (see, for example, Patent Document 1). Known examples of such bicycles include a disconnection mechanism that connects the cleat to the pedal by placing a shoe with a cleat attached on the pedal and stepping down on the pedal in the direction of the pedal's thickness, and then disengages the cleat from the pedal by rotating the cleat. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-095175 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with bicycles like the one described above, the procedures for connecting and disconnecting the cleats from the pedals are different, which makes it difficult for riders to intuitively perform the actions for connecting and disconnecting. Furthermore, if a strong force is applied in the opposite direction (upward) of the pedal's thickness, the cleat will be released, so to prevent this, it is necessary to increase the connecting force of the pedal. However, if the connecting force is increased, a strong force is also required to release the cleat, which is a problem.

[0005] In view of the above, an object of the present invention is to provide a pedal, a cleat, a pedal system, and a bicycle that allows quick and easy connection and disconnection of a cleat from a pedal. [Means for solving the problem]

[0006] A pedal according to one embodiment of the present disclosure is a pedal that can be attached to and detached from a cleat, and comprises a pedal base portion, a pedal rotation connection portion that is provided on the pedal base portion and connected to the cleat, allowing the pedal to rotate relative to the cleat around a rotation axis that extends in the thickness direction of the pedal base portion, and a plurality of pedal engagement portions that are provided on the pedal base portion and that can be detachably engaged with the cleat circumferentially around the rotation axis, the plurality of pedal engagement portions being provided at positions that connect the vertices of a polygon, and the rotation axis passing through the inner region of the polygon. [Effects of the Invention]

[0007] According to one aspect of the present application, the cleat can be quickly and easily connected and disconnected from the pedal. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a side view showing a bicycle and pedals according to an embodiment of the present invention. [Figure 2] 1 is an explanatory diagram showing a pedal system according to an embodiment of the present invention; [Figure 3] FIG. 3 is a plan view of the binding of FIG. 2. [Figure 4] 4 is a cross-sectional view showing how a binding and a cleat are connected, with the cross-section of the cleat facing the cross-section of line AA in FIG. 3. FIG. [Figure 5] FIG. 4 is an enlarged perspective view of the binding and cleat of FIG. 3. [Figure 6] 3 is an explanatory diagram showing the outermost edges and outermost circular arc trajectories of the pedal engagement portion and cleat engagement portion of FIG. 2.

[0023] FIG. [Figure 7] 4 is an enlarged plan view showing the pedal engagement portion of FIG. 3. FIG. [Figure 8] FIG. 4 is an enlarged perspective view of a pedal engagement portion of FIG. 3. [Figure 9]6A and 6B are cross-sectional views of the binding and cleat of FIG. 5 brought even closer together, with a partial cutaway view, in which (A) is an explanatory view showing the state before the binding and cleat engage, and (B) is an explanatory view showing the state after the binding and cleat have engaged. [Figure 10] 10A and 10B are explanatory diagrams showing modified examples of the pedal engagement portion and the cleat engagement portion. [Figure 11] FIG. 3 is a perspective view showing a first modified example of the pedal system of FIG. 2. [Figure 12] 12A and 12B are diagrams showing the pedal system of FIG. 11, in which (A) is a cross-sectional view showing a state in which the binding and the cleat are opposed to each other, and (B) is a cross-sectional view showing a state in which the binding and the cleat are connected to each other. [Figure 13] 10A and 10B are diagrams showing a second modified example of the pedal of FIG. 2, in which (A) is a perspective view showing a state in which the binding and the cleat face each other, and (B) is a cross-sectional view showing a state in which the binding and the cleat are connected. [Figure 14] FIG. 5 is a cross-sectional view showing a third modification of the pedal system of FIG. 4. [Figure 15] FIG. 5 is a cross-sectional view showing a fourth modified example of the pedal system of FIG. [Figure 16] FIG. 6 is a perspective view showing a fifth modified example of the pedal system of FIG. 5. [Figure 17] FIG. 10 is an explanatory diagram showing a sixth modified example of the pedal system of FIG. 2. [Figure 18] FIG. 10 is an explanatory diagram showing a seventh modified example of the pedal system of FIG. 2. [Figure 19] FIG. 10 is a perspective view showing an eighth modified example of the pedal system of FIG. 5. [Figure 20] FIG. 20 is a perspective view showing the cleat and binding of FIG. 19 connected together. [Figure 21] FIG. 10 is a perspective view showing a ninth modified example of the pedal system of FIG. [Figure 22] 22 is a perspective view showing the pedal system of FIG. 21 as seen obliquely from below. FIG. [Figure 23]22A and 22B are views showing a partially cutaway view of the pedal system of FIG. 21, in which (A) is a perspective view showing the state before engagement, and (B) is a perspective view showing the state after engagement. [Figure 24] 22 is a perspective view showing a modification of the cleat rotation connection peripheral wall portion of FIG. 21. FIG. [Figure 25] FIG. 16 is a perspective view showing a tenth modified example of the pedal system of FIG. 5. [Figure 26] FIG. 26 is a perspective view showing a modification of the pedal system of FIG. 25. DETAILED DESCRIPTION OF THE INVENTION

[0009] (Embodiment) The pedals, cleats, pedal systems, and bicycles according to embodiments of the present invention will now be described. FIG. 1 is a side view showing a pedal and a bicycle according to an embodiment of the present invention. FIG. 2 is an explanatory diagram showing the pedal system 3. The bicycle 1 includes a bicycle body 2 and a pedal system 3 (shown in FIG. 2). The bicycle main body 2 includes a frame 2a, a handlebar 2b, a front wheel 2c, a saddle 2d, a rear wheel 2e, a chain wheel 2f, a chain 2g, and a crank 2h. The handlebars 2b are provided on the front side of the frame portion 2a. A front wheel 2c is provided on the front side of the frame portion 2a below the handlebars 2b. A saddle 2d is provided on the rear side of the frame portion 2a. A rear wheel 2e is provided on the rear side of the frame portion 2a below the saddle 2d. A chain wheel 2f is provided on the lower side of the frame portion 2a, and a chain 2g is looped between the chain wheel 2f and the rear wheel 2e. A crank portion 2h is provided on the chain wheel 2f. A pedal 10 is provided at the tip of the crank portion 2h. With this configuration, when a rider sits on the saddle 2d and grips the handlebars 2b, and steps on the pedals 10 to rotate the crank portion 2h, the rear wheel 2e rotates via the chain wheel 2f and the chain 2g.

[0010] The pedal system 3 includes a pedal 10 and a cleat 50 . The pedal 10 includes a crank connecting shaft 30 and a binding 20 . The crank connecting shaft 30 is rotatably attached to the tip of the crank portion 2h. The binding 20 is attached to the crank connecting shaft 30 by a connecting portion (not shown). The bindings 20 and cleats 50 for the right and left feet have pedal engagement portions 23 and cleat engagement portions 53 (described later) oriented in different directions along the circumferential direction S. However, the rest of the main configuration is the same, so the description here will be focused on the binding for the right foot. As shown in FIGS. 3 to 8, the binding 20 includes a pedal base portion 21, a pedal rotation connection portion 22, and a pedal engagement portion . The pedal base 21 is made of a metal such as iron and is formed in a disk shape. The symbol P indicates the center point of the pedal base 21. A pedal rotation connection part 22 is provided in the center of the pedal base 21. The pedal rotation connection portion 22 includes a circular pedal recess 221 and a pedal rotation connection magnet portion 222 . The pedal recess 221 is provided so as to be cylindrically recessed in the thickness direction of the pedal base unit 21. That is, the pedal recess 221 is provided so as to be rectangularly recessed in the thickness direction of the pedal base unit 21 in a side view. Furthermore, the pedal recess 221 is provided concentrically with the pedal base unit 21, with the center point P as the center. A pedal rotation connection magnet unit 222 is provided in this pedal recess 221. The pedal rotation connection magnet part 222 is made of a disk-shaped magnet. That is, the pedal rotation connection magnet part 222 is provided concentrically on the pedal base part 21. One main surface (pedal connecting surface) 223 of this pedal rotation connection magnet part 222 and one main surface (cleat connecting surface) 523 of a cleat rotation connection magnet part 522 (described later) are detachably attracted and connected by magnetic force.

[0011] The diameter L1 of the pedal rotation connection magnet portion 222 is the same as the diameter L2 of the cleat rotation connection magnet portion 522. Therefore, the contact area of ​​the pedal contact surface 223 of the pedal rotation connection magnet portion 222 and the contact area of ​​the cleat contact surface 523 of the cleat rotation connection magnet portion 522 are the same. The pedal contact surface 223 and the cleat contact surface 523 are provided with crack prevention sheets 224, 524, respectively, to prevent cracks. A plurality of pedal engagement portions 23 are provided on the pedal base portion 21. As shown in FIG. 3 , these pedal engagement portions 23 are provided at positions that connect the vertices of a polygon T in a plan view. That is, the pedal engagement portions 23 are arranged at positions where an imaginary polygon T is drawn when the center points 233 of adjacent pedal engagement portions 23 in the circumferential direction S are connected by an imaginary line. Furthermore, the rotation axis N passes through an inner region T1 of the polygon T. Therefore, the pedal engagement portions 23 are provided around the rotation axis N so as to surround the rotation axis N. The rotation axis N is an imaginary line extending in the thickness direction from the center point P. The center point 233 of the pedal engagement portion 23 is a point connecting the center of the maximum width dimension in the width direction and the center of the maximum front-rear dimension in the front-rear direction (the direction perpendicular to the width direction in a plan view). In this embodiment, four pedal engagement portions 23 are provided in the circumferential direction S, and therefore the polygon T is a quadrangle. Furthermore, in plan view, the distance dimension L3 between at least two or more center points 233 and the rotation axis N is the same. In this embodiment, the distance dimension L3 between all of the center points 233 and the rotation axis N is the same. Therefore, the polygon T is a square. Furthermore, the plurality of pedal engagement portions 23 are provided at equal intervals in the circumferential direction S around the rotation axis N. In other words, the plurality of pedal engagement portions 23 are provided at equal intervals in the circumferential direction S around the rotation axis N, which extends from the center point of the pedal rotation connection portion 22 in the thickness direction.

[0012] The pedal engagement portion 23 engages with and disengages from a cleat engagement portion 53 (described later) in the circumferential direction S. As shown in Figure 3, within the circumferential direction S, the direction in which the rider's heel rotates from the outside to the inside of the bicycle body 2 is the engagement direction S1, and the direction in which the rider's heel rotates from the bicycle body 2 to the outside is the disengagement direction S2. The pedal engagement portion 23 includes a pedal engagement wall portion 232 that rises from the pedal base portion 21 in the thickness direction, and a pedal engagement claw portion 231 provided at the tip of the pedal engagement wall portion 232. The pedal engaging wall portion 232, the pedal engaging portion 23 and the pedal base portion 21 are integrally formed.

[0013] The pedal engaging claw 231 is formed in a disk shape and extends parallel to the pedal base 21 in side view as shown in Fig. 4. Furthermore, as shown in Figs. 6 and 7, the pedal engaging claw 231 has an outermost edge 234 and an innermost edge 235 each set at one point. The outermost edge 234 is the portion of the edge of the pedal engaging claw 231 that is located most radially outward among portions that are located on a radial line P1 that extends radially from the center point P in a plan view. In other words, when the pedal engaging claw 231 rotates about the rotation axis N, the outermost edge 234 describes the outermost peripheral arc locus R1 of the pedal engaging claw 231. Similarly, the innermost edge 235 is the portion located most radially inward among the portions located on the radial line P1. In other words, when the pedal engaging pawl 231 rotates around the rotation axis N, the innermost edge 235 describes an innermost circular arc locus R2 on the innermost side of the pedal engaging pawl 231. The radial straight line P1 is an imaginary straight line extending from the center point P in the radial direction. Furthermore, reference numeral 533 denotes the outermost edge of the cleat engagement portion 53 , and reference numeral 534 denotes the innermost edge of the cleat engagement portion 53 , which are provided in the same manner as the outermost edge 234 and the innermost edge 235 .

[0014] Furthermore, the pedal engaging claw 231 includes a region at least partially extending in the release direction S2 from the tip of the pedal engaging wall 232. In other words, the pedal engaging claw does not necessarily have to be shaped so that its entire shape faces the release direction S2, but it is sufficient that at least a portion of it extends in the release direction S2 so as to engage with and release from the cleat engaging portion 53 (described later) in the circumferential direction S. For example, the pedal engaging claw may be a polygonal shape such as a triangle or a square, or some other shape, and its entire shape may face a direction intersecting the radial straight line P1, but it is sufficient that at least a portion of it extends in the release direction S2 so as to engage with and release from the cleat engaging portion 53 in the circumferential direction S.

[0015] The pedal engaging wall portion 232 is formed in an arc shape with the center of rotation being the center point 233 of the pedal engaging claw portion 231. An inner peripheral surface 238 of the pedal engaging wall portion 232 is also formed in an arc shape. The pedal engaging wall 232 is provided on the side of the circumferential edge of the pedal engaging claw 231 facing the engagement direction S1, and the length of the arc is equal to or less than half the circumference of the pedal engaging claw 231. In other words, the pedal engaging wall 232 extends in the region on the side of the engagement direction S1 between the outermost edge 234 and the innermost edge 235 of the circumferential edge of the pedal engaging claw 231. The height of the pedal engaging wall 232 is equal to or greater than the thickness of the cleat engaging claw 531, which will be described later.

[0016] As shown in FIGS. 7 and 8, the pedal base section 21 is provided with a pedal hole 211 penetrating the pedal base section 21 near the pedal engagement section 23. The pedal hole portion 211 is provided at a position facing the pedal engagement claw portion 231 in the thickness direction. The pedal hole portion 211 is formed in a circular shape, and is provided concentrically with the pedal engagement claw portion 231 around a center point 233. The diameter r1 of the pedal engaging claw 231 is equal to or smaller than the diameter r2 of the pedal hole 211. In other words, the area of ​​the inner surface 236 of the pedal engaging claw 231 is equal to or smaller than the opening area of ​​the pedal hole 211. The inner circumferential surface 238 of the pedal engaging wall 232 extends radially inward into the pedal hole 211 and is flush with the outer circumferential surface 237 of the pedal engaging claw 231 in the radial direction. With this configuration, an engagement space K, which is open in the release direction S2, is defined by the inner surface 236 of the pedal engagement claw 231, the inner circumferential surface 238 of the pedal engagement wall 232, and the surface-extending surface 212 of the pedal base 21. The surface-extending surface 212 is an imaginary surface that is flush with the surface of the pedal base 21 in the pedal hole 211. In a plan view, this engagement space K has the same shape and size as, or is larger than, the pedal engagement claw 231. Since the height dimension of the pedal engagement wall 232 is the same as or larger than the thickness dimension of the cleat engagement claw 531, the height dimension of the engagement space K relative to the surface-extending surface 212 is the same as or larger than the thickness dimension of the cleat engagement claw 531.

[0017] 2, the cleats 50 are provided on the sole SH1 of the shoe SH. The sole SH1 has a recess SH2, and the cleats 50 are provided in the recess SH2 so that they are recessed from the sole SH1 into the shoe SH and do not protrude downward from the sole SH1. However, the cleats 50 may also protrude downward from the sole SH1. As shown in FIGS. 4 and 5, the cleat 50 includes a cleat base portion 51, a cleat rotational connection portion 52, and a cleat engagement portion 53. The cleat 50 has the same shape and size as the binding 20, and in FIGS. 4 and 5, the cleat 50 is inverted upside down relative to the binding 20. That is, the cleat base portion 51, the cleat rotation connection portion 52, and the cleat engagement portion 53 have the same shape and size as the pedal base portion 21, the pedal rotation connection portion 22, and the pedal engagement portion 23, respectively. In particular, the shape and number of the pedal engagement portions 23 are the same as the shape and number of the cleat engagement portions 53. Therefore, a description of the cleat 50 will be omitted here. The reference numeral 521 denotes a cleat recess, 511 denotes a cleat hole, 531 denotes a cleat engagement claw, and 532 denotes a cleat engagement wall. The reference numeral 524 denotes a crack prevention sheet. Additionally, the cleat rotation connection magnet portion 522 and the pedal rotation connection magnet portion 222 are arranged so that the magnets have opposite polarities when they are upside down and facing each other.

[0018] Next, a method of using the pedal 10, the cleat 50, the pedal system 3, and the bicycle 1 according to the embodiment of the present invention will be described. As shown in Figure 1, when a rider sits on the saddle 2d, grips the handlebars 2b, and steps on the pedals 10, the crank 2h rotates, which in turn rotates the rear wheel 2e via the chainwheel 2f and chain 2g. The rider then continuously steps on and lifts the pedals 10, causing the bicycle 1 to move forward. At this time, by engaging the pedals 10 with the cleats 50, the rider can effectively use the force pulling down and the force pulling up the pedals 10.

[0019] Here, the operation of connecting the pedal 10 and the cleat 50 will be described. It is assumed that the cleat 50 is attached to the recess SH2 of the shoe SH. When the rider places the shoe SH on the pedal 10, the pedal connecting surface 223 of the pedal rotation connecting magnet portion 222 and the cleat connecting surface 523 of the cleat rotation connecting magnet portion 522 are attracted to each other by magnetic force and connected to each other. Furthermore, when two magnets have joining surfaces of the same shape and area but different polarities, they are attracted to each other by magnetic force and joined together, and have the ability to align their central axes extending in the thickness direction and always join in the same relative position without any radial displacement of the relative positions of the joining surfaces.In other words, such a pair of magnets will always join together in the same relative position with their central axes aligned. In other words, the pedal contact surface 223 and the cleat contact surface 523 always contact each other at the same relative position with the rotation axis N aligned. Therefore, the rider can simply place the shoe SH on the pedal 10 and easily align the rotation axes N of the pedal rotation connection magnet part 222 and the cleat rotation connection magnet part 522 to connect them without having to be mindful of aligning the rotation axes N of these parts.

[0020] Furthermore, when the mating surfaces of the magnets are joined together, a large force is required to separate the two mating surfaces by moving them parallel to each other in the direction of the central axis, whereas a smaller force is required to rotate the two mating surfaces relative to each other around the central axis, even when the mating surfaces are joined together. Therefore, even if the pedal connection surface 223 and the cleat connection surface 523 are attracted and connected by magnetic force, the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 can be easily rotated relative to each other with the rotation axis N as the center of rotation. In other words, when the rider places the shoe SH on the pedal 10 and magnetically attracts and connects the pedal connection surface 223 and the cleat connection surface 523, the rider can easily rotate the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 relative to each other with the rotation axis N as the center of rotation by simply rotating the heel toward the inside of the bicycle main body portion 2. Relative rotation refers to the relative rotation of the pedal rotation connection part 22 and the cleat rotation connection part 52, and includes cases where the pedal rotation connection part 22 is fixed and only the cleat rotation connection part 52 rotates, cases where the cleat rotation connection part 52 is fixed and only the pedal rotation connection part 22 rotates, and even cases where both the pedal rotation connection part 22 and the cleat rotation connection part 52 rotate.

[0021] When the rider then rotates his or her heel inward, the pedal engagement portion 23 and the cleat engagement portion 53 rotate relative to each other around the rotation axis N, as shown in Figure 9(A), and move relatively in the circumferential direction S so as to approach each other. As the heel is further rotated in the same direction, the pedal engagement claw 231 enters the engagement space K of the cleat engagement portion 53, and the cleat engagement claw 531 also enters the engagement space K of the pedal engagement portion 23. Finally, as shown in Figure 9(B), the circumferential edge of the pedal engagement claw 231 comes into contact with the inner circumferential surface 538 of the cleat engagement wall portion 532, and the circumferential edge of the cleat engagement claw 531 also comes into contact with the inner circumferential surface 238 of the pedal engagement wall portion 232, and the pedal engagement portion 23 and the cleat engagement portion 53 engage in the circumferential direction S. In this way, the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 are attracted to each other and the pedal engagement portion 23 and the cleat engagement portion 53 are engaged in the circumferential direction S, thereby connecting the pedal 10 and the cleat 50.

[0022] On the other hand, to release the connection between the pedal 10 and the cleat 50, the rider simply performs the reverse of the above steps. That is, when the rider rotates their heel outward from the bicycle body 2, the pedal engagement portion 23 and the cleat engagement portion 53 move relatively in the circumferential direction S so as to move away from each other, thereby releasing the engagement between them. Furthermore, even if the magnets are joined together at their joining surfaces, when they are pulled apart in a direction intersecting the central axis, a smaller force is required than when they are pulled apart parallel to the central axis, as described above. Therefore, when the rider slides the shoe SH in a direction intersecting the rotation axis N or lifts the heel, the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 are pulled apart, and the connection between the pedal 10 and the cleat 50 is easily released.

[0023] As described above, with the pedal 10, cleat 50, pedal system 3, and bicycle 1 of this embodiment, the rider places their shoe SH on the pedal 10 and, with the pedal rotational connection portion 22 and the cleat rotational connection portion 52 connected, can engage and disengage the pedal engagement portion 23 and the cleat engagement portion 53 in the circumferential direction S simply by rotating their heel. Therefore, the pedal 10 and the cleat 50 can be quickly and easily connected and disengaged by simply rotating their heel in either direction. Furthermore, because the pedal engagement portion 23 is located at a position connecting the vertices of the polygon T, two forces (vertical forces) - the force pushing the pedal 10 downward with the foot and the force pulling the pedal 10 upward with the foot - can be stably transmitted between the cleat 50 and the pedal 10. In other words, when the shoe SH is placed on the pedal 10 and an attempt is made to move it up and down, the load may fluctuate in the forward / backward and left / right directions due to various conditions such as vibration and tilt. However, because the pedal engagement portion 23 is located two-dimensionally at a position connecting the vertices of the polygon T, rather than one-dimensionally on a straight line, the load can be supported two-dimensionally from the position of the vertices of the polygon T, even if the load tends to fluctuate, and the vertical force can be stably transmitted. Furthermore, since the rotation axis N passes through the inner region T1 of the polygon T, the load can be supported from the vertices of the polygon T around the rotation axis N, allowing vertical forces to be transmitted more stably. Furthermore, since the distance dimension L3 between at least two or more pedal engagement portions 23 and the rotation axis N is the same, the two forces of pushing the pedal 10 downward with the foot and pulling it upward can be transmitted more stably between the cleat 50 and the pedal 10. Furthermore, since the distance dimension L3 between the pedal engagement portion 23 and the rotation axis N is the same for all parts, the two forces of pushing the pedal 10 downward with the foot and pulling it upward can be transmitted more stably between the cleat 50 and the pedal 10. Furthermore, since the pedal engagement portion 23 is equipped with a pedal engagement wall portion 232 and a pedal engagement claw portion 231, the pedal engagement portion 23 and the cleat engagement portion 53 can be quickly and easily engaged and disengaged in the engagement space K between the pedal engagement claw portion 231 and the pedal base portion 21.

[0024] Furthermore, because the pedal hole 211 is formed near the pedal engaging claw 231, foreign matter such as dust can be removed from the engagement space K, allowing for quick and easy engagement and disengagement between the pedal engaging portion 23 and the cleat engaging portion 53, thereby preventing a deterioration in fit during engagement due to foreign matter. Furthermore, the inner surface 236 of the pedal engaging claw 231 and the inner circumferential surface 238 of the pedal engaging wall 232 can be easily cleaned through the pedal hole 211. Even if the binding 20 heats up and expands (atomic expansion), for example, in the summer, the pedal hole 211 prevents the atoms in the hole from expanding toward the hole, so they can only expand toward the outside of the hole. Therefore, even if the pedal hole 211 expands, it is prevented from shrinking (deformation is suppressed), allowing for quick and easy engagement and disengagement between the pedal engaging portion 23 and the cleat engaging portion 53, even under changing temperature conditions. Furthermore, the pedal hole 211 contributes to reducing the weight of the pedal 10.

[0025] In addition, because the pedal engaging claw 231 and the pedal hole 211 have the same shape and are located opposite each other, foreign matter adhering to the inner surface 236 of the pedal engaging claw 231 can be efficiently and naturally expelled through the hole of the same shape. Furthermore, in order to prevent as much as possible expansion of the pedal engaging claw 231 and the engagement space K due to heat, heat can be efficiently dissipated through the pedal hole 211 of the same shape. Furthermore, since the area of ​​the inner surface 236 of the pedal engaging claw portion 231 is smaller than the opening area of ​​the pedal hole portion 211, not only can foreign matter adhering to the inner surface 236 of the pedal engaging claw portion 231 be efficiently and naturally expelled through a large hole of the same shape, but heat can also be efficiently dissipated.

[0026] Furthermore, because the pedal engagement claw 231 is circular and the pedal engagement wall 232 is arc-shaped, the engagement space K can be made circular in plan view, and the circular cleat engagement claw 531 can be inserted deep into the engagement space K, increasing the contact area between the outer surface of the cleat engagement claw 531 and the inner surface 236 of the pedal engagement claw 231. As a result, two forces (vertical forces) exerted by the foot when pedaling the pedal 10, namely, a force exerted by the foot pushing downward and a force exerted by the foot pulling upward, can be efficiently transmitted between the cleat 50 and the pedal 10. In this embodiment, the downward pushing force exerted by the foot is efficiently transmitted mainly by the pedal rotation connection portion 22 and the cleat rotation connection portion 52, and the upward pulling force is efficiently transmitted by the pedal engagement portion 23 and the cleat engagement portion 53. Furthermore, because the pedal base 21 and the pedal engagement portion 23 have the same shapes as the cleat base 51 and the cleat engagement portion 53, respectively, the binding 20 can also be used as the cleat 50, and the cleat 50 can also be used as the binding 20. This not only reduces manufacturing costs but also improves convenience in terms of repair, replacement, storage, and the like. Furthermore, since the shape and number of pedal engagement portions 23 installed are the same as those of the cleat engagement portions 53, the manufacturing cost can be reduced by the simple configuration.

[0027] Furthermore, because the outermost edge 234 of the pedal engagement portion 23 is one point, even if the pedal base portion 21 and the pedal engagement portion 23, and the cleat base portion 51 and the cleat engagement portion 53, respectively, have the same shape, the pedal engagement claw 231 and the cleat engagement claw 531 can each enter the engagement space K, allowing for quick and easy engagement and disengagement between the pedal engagement portion 23 and the cleat engagement portion 53. That is, as shown in Fig. 6, for example, if the claw portion E is formed in a rectangular shape toward the center point P, the outermost edge 234 will have two points, and in this case, the outermost circular arc locus R1 will extend radially outward from the claw portions E between the two points of the outermost edge 234. When the claw portions E engage with each other, one claw portion E will collide with the engagement wall portion E1 of the other claw portion E, preventing them from entering all the way in and reducing the overlapping area. However, because the outermost edge 234 of the pedal engagement portion 23 is a single point, when the pedal engagement portion 23 and the cleat engagement portion 53 rotate relative to each other, the outermost circular arc locus R1 does not protrude radially outward, allowing the pedal engagement claws 231 and the cleat engagement claws 531 to penetrate deep into each other, thereby increasing the overlapping area between the pedal engagement portion 23 and the cleat engagement portion 53. This increases the engagement force between them. Also, because the innermost edge 235 of the pedal engagement portion 23 is a single point, even if the pedal base portion 21 and the pedal engagement portion 23, and the cleat base portion 51 and the cleat engagement portion 53 have the same shape, the overlapping area between the pedal engagement portion 23 and the cleat engagement portion 53 can be increased, as described above, thereby increasing the engagement force between them.

[0028] Furthermore, since the pedal rotational connection part 22 is magnetically attracted to the cleat rotational connection part 52 and can rotate relative to the cleat rotational connection part 52, the rider can easily connect and disconnect the pedal 10 and cleat 50 simply by placing and removing the shoe SH from the pedal 10. Furthermore, since the pedal rotation connection part 22 is equipped with a pedal rotation connection magnet part 222, the rider can easily connect and disconnect the pedal 10 and the cleat 50 by simply placing or removing the shoe SH from the pedal 10. Furthermore, since the pedal rotation connection magnet portion 222 is made of a disk-shaped magnet and the area of ​​the pedal connection surface 223 is the same as the area of ​​the cleat connection surface 523, the rider can simply place the shoe SH on the pedal 10 and easily align the rotation axes N of the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 to connect them without having to consciously try to align the rotation axes N of them. Furthermore, since multiple pedal engagement portions 23 are provided at equal intervals in the circumferential direction S with the rotation axis N as the center of rotation, the pedal engagement portions 23 and the cleat engagement portions 53 can be stably engaged in the circumferential direction S in a balanced manner, and the two forces of pushing the pedal 10 downward with the foot and pulling it upward can be transmitted efficiently and in a balanced manner between the cleat 50 and the pedal 10. Furthermore, since the pedal engaging claw portion 231 extends parallel to the pedal base portion 21 in a side view, the pedal engaging portion 23 and the cleat engaging portion 53 can be quickly and easily engaged and disengaged.

[0029] Furthermore, the cleat 50 can provide the same effects as those of the pedal 10 described above. Furthermore, the pedal system 3 includes the pedal 10 and the cleat 50, and therefore the pedal 10 and the cleat 50 can be quickly and easily engaged and disengaged. Furthermore, because bicycle 1 includes pedals 10 and bicycle main body 2, the rider can quickly and easily engage pedals 10 and cleats 50 simply by rotating their heels while sitting on saddle 2d and gripping handlebars 2b while moving forward, and can quickly and easily disengage the two when stopping. This allows the rider to ride comfortably.

[0030] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, FIGS. 11 and 12 show a modification of the above embodiment. 11 and 12, the same components as those shown in FIGS. 1 to 10 are denoted by the same reference numerals, and the description thereof will be omitted. This modified example and the above embodiment have the same basic configuration, and the differences will be mainly described here. The pedal system 3A includes a pedal 10A and a cleat 50A. The pedal 10A is provided with a binding 20A made of metal such as iron. The binding 20A includes a disc-shaped pedal base portion 21A. A pedal rotation connection portion 22A is provided in the center of the pedal base portion 21A. The pedal rotation connection portion 22A is provided with a circular pedal recess 221A. The pedal recess 221A is provided so as to be spherically recessed on the opposite side of the pedal base unit 21A in the thickness direction from the installation side where the pedal engagement portion 23 is provided. That is, the pedal recess 221A is provided so as to be circularly recessed on the opposite side of the thickness direction of the pedal base unit 21A in a side view. That is, the pedal engagement portion 23 is provided on one of the two main surfaces of the pedal base unit 21A, and the pedal recess 221A is provided so as to protrude from the other main surface. Furthermore, the pedal recess 221A is provided concentrically with the pedal base unit 21A, centered on a center point P. A pedal exclusion portion 221A1 that excludes foreign matter such as dust is provided in the center of the pedal recess 221A. This pedal exclusion portion 221A1 is a through-hole that allows foreign matter in the pedal recess 221A to fall through the pedal exclusion portion 221A1. It should be noted that the pedal rotation connecting magnet portion 222 is not provided. In addition, three pedal engagement portions 23 are provided in the circumferential direction S, and the polygon T is an equilateral triangle.

[0031] Cleat 50A has a disc-shaped cleat base portion 51A. A cleat rotation connection portion 52A is provided in the center of cleat base portion 51A. Cleat rotation connection portion 52A has a circular cleat protrusion 521A. The cleat protrusions 521A are provided so as to protrude spherically toward the installation side of the cleat base 51A in the thickness direction, where the cleat engagement portions 53 are provided. That is, the cleat protrusions 521A are provided so as to protrude circularly toward the installation side of the cleat base 51A in the thickness direction, when viewed from the side. That is, the cleat engagement portions 53 are provided on one of the two main surfaces of the cleat base 51A, and the cleat protrusions 521A are provided so as to protrude toward the one main surface. Furthermore, the cleat protrusions 521A are provided concentrically with the cleat base 51A, centered on a center point P. A cleat removal portion 521A1 is provided in the center of the cleat protrusions 521A. This cleat removal portion 521A1 is a through-hole that allows foreign matter inside the cleat protrusions 521A to fall through the cleat removal portion 521A1. It should be noted that the cleat rotation connection magnet portion 522 is not provided. Additionally, three cleat engagement portions 53 are provided in the circumferential direction S, and the polygon T is an equilateral triangle.

[0032] With this configuration, as shown in Figure 12(A), with the cleat 50A positioned above the pedal 10A, the cleat 50A is brought closer to the pedal 10A. Then, as shown in Figure 12(B), the cleat protrusion 521A fits into the pedal recess 221A, and the cleat protrusion 521A and the pedal recess 221A are connected with their rotational axes N aligned. In this state, by rotating the cleat 50A in the circumferential direction S, the pedal engagement portion 23 and the cleat engagement portion 53 engage with each other. As described above, the pedal 10A, cleat 50A, pedal system 3A, and bicycle of this embodiment not only achieve the same effects as those described above, but also have a simple configuration that allows the pedal 10A and cleat 50A to be quickly and easily connected and disconnected. Furthermore, since foreign matter can be removed through the pedal removal portion 221A1 and the cleat removal portion 521A1, it is possible to prevent a decrease in fit during engagement due to foreign matter, and engagement and disengagement between the pedal engagement portion 23 and the cleat engagement portion 53 can be performed quickly and easily.

[0033] The shapes of the cleat protrusions 521A and the pedal recesses 221A can be modified as appropriate. For example, as shown in Fig. 13, the cleat protrusions 521A and the pedal recesses 221A may each protrude and recede in an inverted cone shape. That is, the cleat protrusions 521A and the pedal recesses 221A may each protrude and recede in a triangular shape in the thickness direction of the pedal base 21 in a side view. Additionally, the cleat protrusions 521A and the pedal recesses 221A may be rectangular or elliptical in shape, protruding and recessed, respectively, when viewed from the side. Furthermore, the cleat protrusions 521A and the pedal recesses 221A do not have to have the same shape, and may have different shapes.

[0034] Furthermore, various other modifications are possible to the above-described embodiment and modified examples. For example, the pedal engagement portion 23 is provided at a position connecting the vertices of a polygon T with the rotation axis N passing through the inner region T1, but this is not limited to this, and the configuration can be changed as appropriate. For example, the rotation axis N may pass through an outer region of the polygon T rather than the inner region T1. Although the polygon T is drawn by connecting the center points 233 of the pedal engagement portions 23, this is not limitative and the configuration can be modified as appropriate. For example, the distal end, proximal end, one end or the other end in the width direction of the pedal engagement portions 23 may be selected and connected, or any one point on the pedal engagement portions 23 may be selected and connected. Also, different points on a plurality of pedal engagement portions 23 may be selected and connected. Furthermore, although the distance dimension L3 between two or more pedal engagement portions 23 and the rotation axis N is the same, this is not limitative, and all of the distance dimensions L3 may be different. Furthermore, although the distance dimension L3 between the pedal engaging portion 23 and the rotation axis N is the same for all of them, this is not limitative, and all of the distance dimensions L3 may be different. Furthermore, although the pedal engagement portion 23 is described as including the pedal engagement claw portion 231 and the pedal engagement wall portion 232, the configuration is not limited to this and can be changed as appropriate. Furthermore, although the pedal engagement claw 231 is described as extending parallel to the pedal base 21 in side view, this is not limitative and the pedal engagement claw 231 may be provided at an angle downward or upward. If the pedal engagement claw 231 is provided at an angle upward, the pedal engagement claw 231 will fit into the cleat hole 511 when engaging the pedal engagement portion 23 with the cleat engagement portion 53, thereby strengthening the engagement force. Furthermore, although the length dimension of the pedal engaging wall 232 in the circumferential direction S is set to be equal to or less than half the circumference of the pedal engaging claw 231, this is not limited thereto and the length may be greater than half the circumference. Furthermore, although the pedal engaging wall 232 is set to extend in a region on the engagement direction S1 side between the outermost edge 234 and the innermost edge 235 of the circumferential edge of the pedal engaging claw 231, this is not limited thereto and the pedal engaging wall 232 may extend beyond the gap between the outermost edge 234 and the innermost edge 235 into a region on the release direction S2 side. Furthermore, although the pedal base portion 21, the pedal engagement wall portion 232, and the pedal engagement claw portion 231 are integrally formed, this is not limitative, and each may be attached as a separate member. Furthermore, although the pedal base 21 is made of metal, the present invention is not limited to this and the material can be changed as appropriate, for example, to resin. Furthermore, although the pedal base 21 has been described as being disc-shaped, the configuration is not limited to this and can be modified as appropriate. For example, the pedal base 21 may be a polygonal shape such as a triangle or a rectangle, or an oval, or other shapes.

[0035] Furthermore, although the pedal hole portion 211 is provided, this is not limitative, and the pedal hole portion 211 does not necessarily have to be provided. Furthermore, although the pedal hole portion 211 is provided in the vicinity of the pedal engaging claw portion 231, this is not limitative and the position does not have to be in the vicinity and can be changed as appropriate. Furthermore, although the pedal hole portion 211 is provided at a position facing the pedal engagement claw portion 231, this is not limitative and the position does not have to be at an opposing position and can be changed as appropriate. Furthermore, although the pedal hole portion 211 is a through-hole that penetrates the pedal base portion 21, the present invention is not limited to this, and the pedal hole portion 211 may be a recess that does not penetrate through. Furthermore, although the pedal engaging claw portion 231 and the pedal hole portion 211 have been described as having the same shape, this is not limitative and they may have different shapes.

[0036] Furthermore, although the pedal engagement claw 231 and the pedal hole 211 are described as being circular, the shape is not limited to this and can be changed as appropriate. For example, they may be rectangular, triangular, elliptical, or other shapes. Furthermore, although the area of ​​the inner surface 236 of the pedal engagement claw 231 is set to be smaller than the opening area of ​​the pedal hole 211, this is not limitative and these areas can be changed as appropriate. For example, the area of ​​the inner surface 236 of the pedal engagement claw 231 may be larger than the opening area of ​​the pedal hole 211, or the two areas may be the same. Furthermore, although the pedal engaging claw portion 231 is circular and the pedal engaging wall portion 232 is arc-shaped, the shapes are not limited to this and can be changed as appropriate. Furthermore, although the pedal base 21 and the pedal engagement portion 23 are described as having the same shape as the cleat base 51 and the cleat engagement portion 53, respectively, this is not limitative and they may have different shapes and sizes. Furthermore, although the shape and number of pedal engagement portions 23 are the same as the shape and number of cleat engagement portions 53, this is not limitative and the shapes and numbers may be different. Furthermore, although the engagement space K has the same shape and size as or is larger than the pedal engagement claw 231 in plan view, this is not limiting, and the inner circumferential surface 238 of the pedal engagement wall 232 may be positioned radially outward to make the size of the engagement space K larger than the pedal engagement claw 231. This allows for play (margin) due to the difference in size when the cleat engagement claw 531 is inserted into the engagement space K. Note that the configuration can also be changed so that there is no play for advanced riders, some play for intermediate riders, and even more play for beginners.

[0037] Furthermore, although the pedal engagement portion 23 is described as being circular and having a single outermost edge 234, this is not limiting and the configuration can be modified as appropriate. For example, as shown in FIG. 10 , the pedal engagement claw 231a may be triangular and have a single outermost edge 234, or the pedal engagement claw 231b may be rectangular and have a single outermost edge 234. Of course, other polygonal, elliptical, or other shapes may also be used, each having a single outermost edge. Furthermore, the outermost edge of the pedal engagement claw 231c does not have to be a single point; instead, the outer periphery of the pedal engagement claw 231c may have an arc-shaped periphery with multiple points arranged on the outermost periphery arc locus R1, forming a curve. Even in this case, connecting the multiple points forms a curve in the circumferential direction S on the outermost periphery arc locus R1, thereby increasing the overlapping area between the pedal engagement portion 23 and the cleat engagement portion 53. Also, like the claw portion E shown in FIG. 6, there may be a plurality of outermost edge portions 234, and the outermost circular arc locus R1 may protrude radially outward. It goes without saying that the innermost edge 235 can also be changed in the same manner as above. Furthermore, it goes without saying that the cleat engagement claws 531a, 531b, 531c can be similarly changed.

[0038] Furthermore, while the pedal rotation connection portion 22 and the cleat rotation connection portion 52 are described as comprising the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522, respectively, this is not limited to this and their configurations can be modified as appropriate. For example, at least one of the pedal rotation connection portion 22 or the cleat rotation connection portion 52 may be provided with a rotation connection magnet portion. Also, neither the pedal rotation connection portion 22 nor the cleat rotation connection portion 52 may be provided with the pedal rotation connection magnet portion 222 or the cleat rotation connection magnet portion 522. In addition, separate connection magnet portions made of magnets may be provided so that the two are attracted to each other by the magnetic force of the connection magnet portions. Furthermore, although the pedal rotation connection portion 22 and the cleat rotation connection portion 52 are described as including the pedal recess 221 and the cleat recess 521, these configurations can be modified as appropriate. For example, at least one of the pedal recess 221 and the cleat recess 521 may be a convex portion. Furthermore, at least one of the pedal recess 221 and the cleat recess 521 may not be provided and may be a flat surface, for example. Furthermore, although the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 are described as being circular, this is not limitative and the configuration can be changed as appropriate. Note that adhesion does not only mean that the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 are directly joined, but also that they are indirectly joined via an intervening member such as a protective member, or that they are attracted to each other due to the space or the shape of the joint. Furthermore, although it has been described that the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 are made of disk-shaped magnets and that the pedal interface surface 223 of the pedal rotation connection magnet portion 222 is the same in area as the cleat interface surface 523 of the cleat rotation connection magnet portion 522, this is not limitative and the configuration can be changed as appropriate. For example, the areas may be different. Specifically, the area of ​​the pedal interface surface 223 may be larger or smaller than the area of ​​the cleat interface surface 523.

[0039] Furthermore, although it has been described that a plurality of pedal engagement portions 23 are provided, this is not a limitation and the configuration can be changed as appropriate. For example, there may be one pedal engagement portion 23, two to three pedal engagement portions 23, or five or more pedal engagement portions 23. That is, when one pedal engagement portion 23 is provided, it is provided at a single point without being located at a position connecting the long points of the polygon T, and when two pedal engagement portions are provided, it is provided at a position connecting a straight line without being located at a position connecting the long points of the polygon T. Furthermore, although all of the pedal engagement portions 23 are described as being equally spaced apart in the circumferential direction S, this is not limiting and the configuration can be modified as appropriate. For example, the pedal engagement portions 23 may be provided at different intervals in the circumferential direction S. Specifically, only some of the pedal engagement portions 23 may be provided at different intervals in the circumferential direction S, while the other pedal engagement portions 23 are provided at equal intervals, or all of the pedal engagement portions 23 may be provided at different intervals. Furthermore, at least three or more pedal engagement portions 23 may be provided, and these at least three or more pedal engagement portions 23 may be provided at equal intervals in the circumferential direction S. Furthermore, although the pedal 10 has been described as including the crank connecting shaft 30 and the binding 20, this is not limitative and the pedal 10 may not include the crank connecting shaft 30. In other words, the pedal 10 may include only the binding 20. It goes without saying that the cleat 50 can also be modified in various ways similar to those described above. The configuration of the bicycle main body 2 can also be changed as appropriate. For example, although the bicycle main body 2 is described as being a two-wheeled vehicle having a front wheel 2c and a rear wheel 2e, it may also be a three-wheeled vehicle or a four-wheeled vehicle.

[0040] Furthermore, the configuration of the pedal system 3 can be modified in various ways. FIG. 14 shows a pedal system 3B. The pedal system 3B includes a pedal 10B and a cleat 50B. The pedal 10B includes a binding 20B. The pedal base 21 is made of a material that can be attracted by magnetic force, such as iron, and the pedal rotation connection magnet 222 is provided so as to be magnetically attracted and detachable to the bottom surface of the pedal recess 221. A pedal stopper member 225 extending radially inward is provided at the edge of the pedal recess 221. The pedal stopper member 225 is formed in a ring shape and is provided concentrically with the pedal recess 221 at the edge of the pedal recess 221. The diameter of the pedal stopper member 225 is smaller than the diameter of the edge of the pedal recess 221. Furthermore, the height from the edge of the pedal stopper member 225 to the bottom surface of the pedal recess 221 is greater than the thickness of the pedal rotation connection magnet 222. Therefore, the pedal rotation connection magnet portion 222 is movable in the direction of the rotation axis N, and the pedal stopper member 225 comes into contact with the pedal rotation connection magnet portion 222, thereby restricting the pedal rotation connection magnet portion 222 from moving outward in the direction of the rotation axis N. The cleat 50B has the same configuration as the binding 20B, and therefore a description thereof will be omitted. Reference numeral 525 denotes a cleat stopper member.

[0041] With this configuration, when the binding 20B and the cleat 50B are separated, the pedal rotation connection magnet portion 222 is magnetically attracted to the bottom of the pedal recess 221, and the cleat rotation connection magnet portion 522 is magnetically attracted to the bottom surface of the cleat recess 521. When the rider places the shoe SH on the pedal 10B, the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 are attracted to each other by magnetic force, and move away from their respective bottoms toward each other. The pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 are then attracted to each other by magnetic force and joined together. Furthermore, as described above, when the rider rotates their heel, the pedal engagement portion 23 and the cleat engagement portion 53 engage with each other. On the other hand, if the rider rotates their heel in the opposite direction to disengage the pedal engagement portion 23 from the cleat engagement portion 53, and then slides their shoe SH in a direction intersecting the rotation axis N or lifts their heel, the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 come into contact with the pedal stopper member 225 and the cleat stopper member 525, respectively, and their movement is restricted, causing them to move away from each other. The pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 are then attracted to their bottom surfaces by their respective magnetic forces. This releases the connection between the pedal 10B and the cleat 50B.

[0042] This not only achieves the same effect as above, but also protects the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522. In other words, when the pedal 10B and the cleat 50B are not connected, the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 are attracted to the bottom surfaces, respectively, so that they do not protrude from the pedal base portion 21 and the cleat base portion 51. Therefore, even when the user walks on the ground wearing shoes SH with cleats 50B attached, or when the shoes SH are placed on the pedal 10B without cleats 50B attached, the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 are protected.

[0043] 15, the pedal recess 221 and the cleat recess 521 may be through holes. A pedal attraction plate 226 and a cleat attraction plate 526 that cover the pedal recess 221 and the cleat recess 521 are provided on the rear surfaces of the pedal base section 21 and the cleat base section 51, respectively. The pedal attraction plate 226 and the cleat attraction plate 526 are made of a material that can be attracted by magnetic force, such as iron, and are formed in a plate shape. This allows the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 to move in the direction of the rotation axis N, thereby achieving the same effect as above. 14 and 15, the pedal stopper member 225 and the cleat stopper member 525 are formed in a ring shape, but this is not limited to this and their shapes can be changed as appropriate. For example, they may be provided as multiple members arranged in the circumferential direction, or may be polygonal such as triangular or rectangular, elliptical, or other shapes. 14 and 15 show that the pedal stopper member 225 and the cleat stopper member 525 are provided, but this is not limiting and they may be provided on at least one of the pedal 10B and the cleat 50B. In other words, at least one of the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 may be configured to move in the direction of the rotation axis N. Furthermore, although the pedal stopper member 225 and the cleat stopper member 525 are provided as separate members on the pedal base portion 21 and the cleat base portion 51, respectively, this is not limited to this, and the pedal stopper member 225 and the cleat stopper member 525 may be provided integrally with the pedal base portion 21 and the cleat base portion 51.

[0044] 16, the binding 20 may have the pedal engagement fixing portion 24, and the cleat 50 may have the cleat engagement fixing portion 54. The pedal engagement fixing portion 24 and the cleat engagement fixing portion 54 fix and release the engagement state between the pedal engagement portion 23 and the cleat engagement portion 53. The pedal engaging and fixing portion 24 includes a pedal fixing protrusion 241 provided on the edge of the pedal recess 221. A plurality of pedal fixing protrusions 241 are provided, and are provided at equal intervals in the circumferential direction S. The cleat engagement fixing portion 54 includes a cleat fixing recess 541 provided on the edge of the cleat recess 521. A plurality of cleat fixing recesses 541 are provided, and are arranged at equal intervals in the circumferential direction S. With this configuration, when the pedal engagement portion 23 and the cleat engagement portion 53 engage, the pedal engagement fixing portion 24 and the cleat engagement fixing portion 54 are fixed, maintaining the engagement between the pedal engagement portion 23 and the cleat engagement portion 53. In other words, when the pedal engagement portion 23 and the cleat engagement portion 53 engage, the pedal fixing protrusion 241 and the cleat fixing recess 541 engage with each other, restricting movement of the pedal engagement portion 23 and the cleat engagement portion 53 in the circumferential direction S. Note that, when the cleat 50 is rotated with a predetermined force or more, the engagement between the pedal fixing protrusion 241 and the cleat fixing recess 541 disengages, allowing movement of both in the circumferential direction S. This makes it possible to prevent the engagement between the pedal engagement portion 23 and the cleat engagement portion 53 from loosening.

[0045] While the pedal engagement fixing portion 24 and the cleat engagement fixing portion 54 are described as comprising the pedal fixing protrusion 241 and the cleat fixing recess 541, respectively, this is not limited thereto and the configurations can be modified as appropriate. For example, the pedal engagement fixing portion 24 may comprise the pedal fixing recess, and the cleat engagement fixing portion 54 may comprise the cleat fixing protrusion. Alternatively, the pedal engagement fixing portion 24 may comprise the pedal fixing protrusion 241 and the pedal fixing recess, and the cleat engagement fixing portion 54 may comprise the cleat fixing recess 541 and the cleat fixing protrusion. Furthermore, the pedal engagement fixing portion 24 and the cleat engagement fixing portion 54 may each comprise only the pedal fixing protrusion and the cleat fixing protrusion that are offset in the circumferential direction S, and the abutment of these pedal fixing protrusions and cleat fixing protrusions restricts movement of the pedal engagement portion 23 and the cleat engagement portion 53 in the circumferential direction S. Furthermore, it is possible to appropriately change the installation positions of the pedal engagement fixing portions 24 and the cleat engagement fixing portions 54. For example, although the pedal engagement fixing portions 24 and the cleat engagement fixing portions 54 are described as being provided at equal intervals in the circumferential direction S, they may also be provided at different intervals. In addition, the pedal engagement fixing portion 24 and the cleat engagement fixing portion 54 may be provided on the pedal base portion 21 and the cleat base portion 51, the pedal engagement portion 23 and the cleat engagement portion 53, or the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522, respectively.

[0046] 17, a pedal system 3C may include a pedal 10C and a cleat 50. The pedal 10C includes a pair of bindings 20. That is, the pair of bindings 20 are mounted upside down on the crank connecting shaft 30. This allows the rider to quickly and easily connect the pedal 10C to the cleat 50 simply by placing their shoe SH on the pedal 10C and twisting their heel, without being aware of the upside-down position of the pedal 10C. Note that in FIG. 17, the lower binding 20 is shown separated from the crank connecting shaft 30 for ease of explanation. It goes without saying that the upper binding 20 is fixed to one main surface of the crank connecting shaft 30 and the lower binding 20 is fixed to the other main surface of the crank connecting shaft 30. 18, a pedal system 3D may include a pedal 10D and a cleat 50. The pedal 10D includes a pedal body 31 rotatably mounted on a crank 2h. The pedal body 31 is formed in a plate shape, with a binding 20 provided on one main surface thereof. This allows the rider to place their shoe SH on the pedal 10D and easily rotate their heel, enabling the pedal 10D and the cleat 50 to be quickly and easily connected. Alternatively, the pedal 10D may have a binding 20 provided on each of the upper and lower surfaces of the pedal body 31. 18, three pedal engagement portions and three cleat engagement portions are provided at equal intervals in the circumferential direction S.

[0047] Furthermore, although the height dimension of the pedal engagement wall 232 is set to be the same as the thickness dimension of the pedal engagement claw 231, this is not limited to this and can be changed as appropriate. For example, the height dimension of the pedal engagement wall 232 may be greater than the thickness dimension of the pedal engagement claw 231. In other words, it is sufficient that the height dimension of the engagement space K is set to be equal to or greater than the thickness dimension of the pedal engagement claw 231.

[0048] 19, a pedal system 3E may include a pedal 10E and a cleat 50E. The outer edge of the pedal base 21 is cut out. That is, the pedal base 21 is configured such that its outer edge is cut out together with the pedal hole 211. The pedal hole 211 is provided in a position facing the engagement claw 231 in the thickness direction. In this manner, the pedal hole 211 may have an edge that extends along the entire periphery, as shown in FIG. 7, or may have a portion of the edge that is cut out, as shown in FIG. 19. The pedal hole 211 minimizes deformation of the cleat 50E and the binding 20E, and also contributes to weight reduction. In addition, a through hole is provided in the center of the pedal rotation connection magnet part 222, and it is fixed via a screw. The pedal engaging wall 232 is raised in a direction intersecting the pedal base 21. That is, the pedal engaging wall 232 is provided at an angle relative to the pedal base 21 in a side view. A pedal engaging claw 231 formed in a substantially semicircular shape is provided at the tip of the pedal engaging wall 232. It goes without saying that the cleat 50E has the same configuration. With this configuration, when the cleat 50E is rotated with the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 joined by magnetic force, the pedal engagement portion 23 and the cleat engagement portion 53 engage, connecting the cleat 50E to the binding 20E, as shown in Figure 20. Furthermore, when the cleat 50E is rotated in the reverse direction, the pedal engagement portion 23 and the cleat engagement portion 53 are disengaged.

[0049] 21 and 22, a pedal system 3F may include a pedal 10F and a cleat 50F. The pedal 10F and the cleat 50F have different shapes. The pedal base 21 is provided with three engagement portions 23F. In side view, each engagement portion 23F includes a pedal engagement claw 231F that extends linearly and inclined obliquely upward from the pedal base 21. The pedal engagement claw 231F is formed in a rectangular parallelepiped shape, but is not limited to this and can be modified as appropriate. The outermost edge of each pedal engagement claw 231F in the radial direction is curved. However, this outermost edge does not have to be curved. A pedal hole portion 211 is provided in the pedal base portion 21 near the pedal engaging claw portion 231F. The pedal hole portion 211 includes a facing region 211a facing the pedal engaging claw portion 231F in the thickness direction, and a front region 211b disposed forward of the pedal engaging claw portion 231F in the circumferential direction S. In other words, the pedal hole portion 211 is provided from the facing region 211a facing the pedal engaging claw portion 231F to the front region 211b forward.

[0050] A pedal engaging and fixing portion 24F is provided on the pedal base portion 21 of the binding 20F. The pedal engaging and fixing portion 24F includes a pedal fixing through-hole 241F, a pedal fixing convex portion 242F, and a pedal fixing elastic portion 243F. The pedal fixing through-hole 241F is a circular through-hole formed in the pedal base part 21. The opening area of ​​the pedal fixing through-hole 241F is larger on the back surface of the pedal base part 21 and smaller on the front surface. The pedal fixing convex portion 242F is formed in a spherical shape and is disposed from the rear surface of the pedal base portion 21 into the pedal fixing through-hole 241F. The pedal fixing elastic portion 243F is made of an elastic member and biases the pedal fixing convex portion 242F from the rear surface of the pedal base portion 21 toward the front surface. As a result, in its natural state, the pedal fixing convex portion 242F has an upper portion protruding from the surface of the pedal base portion 21 due to the biasing force of the pedal fixing elastic portion 243F, and when this portion is pressed from above toward the back surface, it moves toward the back surface against the biasing force of the pedal fixing elastic portion 243F and sinks from the surface of the pedal base portion 21 into the pedal fixing through-hole 241F. Further, the pedal base portion 21 is formed with a mounting hole 213F for mounting the crank connecting shaft portion 30 thereon.

[0051] The cleat base 51 is also provided with a cleat engagement portion 53F and a cleat hole 511. The cleat engagement portion 53F and the cleat hole 511 have the same configuration as the pedal engagement portion 23F and the pedal hole 211F, and therefore a description thereof will be omitted here. Note that the reference numeral 531F denotes a cleat engagement claw portion, the reference numeral 511a denotes a facing region, and the reference numeral 511b denotes a front region. Additionally, a cleat rotational connection portion 52F is provided on the outer edge of the cleat base portion 51. The cleat rotational connection portion 52F is provided with a cylindrical cleat rotational connection peripheral wall portion 522F. The inner periphery of the cleat rotational connection peripheral wall portion 522F is a circumferential surface or a polygonal surface. The inner diameter of the cleat rotational connection peripheral wall portion 522F is set to be the same as or larger than the outer diameter of the cleat base portion 51. Additionally, cleat engagement fixing portions 54F are provided on the cleat base portion 51. The cleat engagement fixing portions 54F are through-holes formed in the cleat base portion 51. The cleat base 51 also has an attachment hole 513F formed therein for attachment to a shoe SH. Neither the pedal 10F nor the cleat 50F is provided with a rotary connection magnet portion or the like.

[0052] With this configuration, as shown in FIG. 23(A), when the cleat 50F is brought closer to the pedal 10F, the pedal base 21 is disposed within the cleat rotational connection peripheral wall 522F. At this time, the inner peripheral surface of the cleat rotational connection peripheral wall 522F guides the pedal base 21 so that the cleat 50F and the binding 20F are concentrically disposed. This connects the cleat 50F and the binding 20F. Note that "connected" refers to placing the cleat 50F and the binding 20F in a state where their rotation is guided relative to each other so that the cleat engagement portion 53F and the pedal engagement portion 23F engage. In other words, the cleat 50F and the binding 20F are guided in rotation about the rotation axis N. The rider then rotates the cleat 50F inward. At this time, the inner peripheral surface of the cleat rotation connection peripheral wall 522F abuts against the outer peripheral surface of the pedal base 21, thereby guiding the rotation of the cleat 50F and binding 20 about the rotation axis N. The cleat engagement claw 531F is disposed within the front region 211b of the pedal hole 211, and the pedal engagement claw 231F is disposed within the front region 511b of the cleat hole 511. When the cleat 50F is further rotated inward, the cleat engagement claw 531F enters the opposing region 211a of the pedal hole 211 while being guided by the cleat rotation connection peripheral wall 522F, and the pedal engagement claw 231F enters the opposing region 511a of the cleat hole 511, as shown in FIG. 23(B). The cleat engagement claw 531F and the pedal engagement claw 231F engage with each other while elastically deforming.

[0053] At this time, the inner surface of the cleat base 51 abuts against the surface of the pedal base 21. The cleat engagement / fixing portion 54F and the pedal fixing through-hole 241F are aligned. Therefore, the pedal fixing protrusion 242F is biased by the pedal fixing elastic portion 243F, causing it to protrude from the surface of the pedal base 21 through the pedal fixing through-hole 241F and be positioned within the cleat engagement / fixing portion 54F. Furthermore, when the cleat 50F is rotated in the reverse direction, the engagement between the pedal engagement portion 23F and the cleat engagement portion 53F is released. This allows the cleat engagement claw 531F and the pedal engagement claw 231F to be engaged while elastically deforming with each other, and the restoring force of this elastic deformation increases the engagement force even when the contact area between them is reduced. This reduces the stroke of the rotational movement for the rider to engage and disengage, improving convenience. Furthermore, since the cleat engagement fixing portion 54F and the pedal engagement fixing portion 24F are provided, the cleat engagement claw portion 531F and the pedal engagement claw portion 231F can be fixed in an engaged state, and can be easily released by simply rotating the cleat 50F outward.

[0054] The cleat 50F and pedal 10F may be upside down, but if they are upside down, the left and right sides will be reversed for the right and left feet. Furthermore, the cleat rotatable connection peripheral wall portion 522F does not have to be provided. The inner and outer shapes of the cleat rotatable connection peripheral wall portion 522F can be modified as appropriate, and for example, the outer shape may be a polygon such as a triangle or a rectangle in plan view, or other shapes. For example, as shown in FIG. 24, the outer shape of the cleat rotatable connection peripheral wall portion 522F1 may be a rectangle in plan view, forming a cube. Alternatively, the outer shape of the cleat rotatable connection peripheral wall portion 522F1 may be formed as a cylinder. Furthermore, a rotary connection magnet portion may be provided on at least one of the pedal 10F and the cleat 50F. Furthermore, the cleat engagement fixing portion 54F and the pedal engagement fixing portion 24F do not necessarily have to be provided.

[0055] 25, a pedal system 3G may include a pedal 10G and a cleat 50G. The pedal 10G and the cleat 50G have different shapes. The pedal system 3G is shown as being for the left foot. The binding 20G is an inverted version of the cleat 50F shown in Figure 21, and is essentially the same in structure, so a description thereof will be omitted here. However, the binding 20G does not have a cleat engagement fixing portion 54F. Reference numeral 23G denotes a pedal engagement portion, reference numeral 231G denotes a pedal engagement claw portion, reference numeral 22G denotes a pedal rotation connection portion, and reference numeral 222G denotes a pedal rotation connection peripheral wall portion. The pedal rotation connection peripheral wall portion 222G has the same structure as the cleat rotation connection peripheral wall portion 522F. The cleat 50G includes a disc-shaped cleat base 51G. Three cleat engagement portions 53G are provided at equal circumferential intervals on the outer peripheral surface of the cleat base 51G. The space between the cleat engagement portions 53G in the circumferential direction defines a front region 511b of the cleat hole 511. The cleat engagement portion 53G includes a cleat engagement claw 531G. At the circumferential front end of the cleat engagement portion 53G, the cleat engagement claw 531G is formed as an inclined surface whose thickness gradually decreases toward the circumferential front. The underside of the cleat engagement claw 531G is flat from the circumferential rear end to the circumferential front end. The cleat 50G also includes a cleat engagement fixing portion 54G. The cleat engagement fixing portion 54G is formed in a disk shape and is adapted to be attached to the cleat base portion 51G. The cleat engagement fixing portion 54G is formed with cleat fixing notches 541G that extend linearly from the edge toward the inner region. Three cleat fixing notches 541G are formed at equal intervals in the circumferential direction.

[0056] With this configuration, when the rider places his / her foot on the pedal 10G, the cleat 50G is guided by the inner circumferential surface of the pedal rotation connection peripheral wall 222G and is arranged concentrically within the pedal rotation connection peripheral wall 222G, connecting the cleat 50G to the binding 20G. In other words, the cleat 50G and the binding 20G are guided to rotate about the rotation axis N. When the rider then rotates his / her heel inward, the cleat 50G is guided by the inner circumferential surface of the pedal rotation connection peripheral wall 222G and rotates about the rotation axis N, causing the cleat engagement claw 531G and the pedal engagement claw 231G to engage while elastically deforming. At this time, the tip of the pedal engagement claw 231G is positioned within the cleat fixing notch 541G, thereby fixing the engagement between the pedal engagement claw 231G and the cleat engagement claw 531G. When the rider rotates his / her heel outward, the pedal engaging claw 231G and the cleat engaging claw 531G are disengaged from each other. This can provide the same effects as those described above. Furthermore, since the cleat engagement fixing portion 54G is provided, the cleat engagement claw portion 531G and the pedal engagement claw portion 231G can be fixed in an engaged state, and can be easily released by simply rotating the cleat 50G outward.

[0057] The cleat 50G and the pedal 10G may be upside down, but if they are upside down, the left and right sides will be reversed for the right and left feet. The pedal rotation connection peripheral wall portion 222G does not necessarily have to be provided. The inner and outer shapes of the pedal rotation connection peripheral wall portion 222G can be changed as appropriate, and for example, the outer shape may be a polygon such as a triangle or a rectangle in plan view, or any other shape. Furthermore, a rotary connection magnet portion may be provided on at least one of the pedal 10G and the cleat 50G. It goes without saying that the number of cleat engagement portions 53G and cleat fixing notches 541G provided can be changed as appropriate. Also, the cleat engagement fixing portion 54G does not have to be provided. The configuration of the cleat fixing notch 541G can be modified as appropriate. For example, as shown in FIG. 26, the cleat engagement fixing portion 54G may not have a notch, but may instead have a downward convex portion extending linearly from the edge of the cleat engagement fixing portion 54G toward the inner region. That is, the cleat engagement fixing portion 54G may have a cleat fixing downward convex portion 5411G formed thereon. The cleat fixing downward convex portion 5411G protrudes downward in an arc shape from the back surface of the cleat engagement fixing portion 54G. As a result, when the cleat engagement claw 531G engages with the pedal engagement claw 231G, the tip of the pedal engagement claw 231G is positioned circumferentially beyond the cleat engagement downward convex portion 5411G, and the cleat engagement claw 531G and the pedal engagement claw 231G are fixed in an engaged state. Of course, this engagement can be released by rotating the cleat 50G outward.

[0058] Furthermore, although the pedal rotational connection portions 22, 22G and cleat rotational connection portions 52, 52F are provided, this is not limitative, and the pedal rotational connection portions 22, 22G and cleat rotational connection portions 52, 52F do not necessarily have to be provided. Furthermore, with the exception of Figures 24 and 25, the binding 20 and cleat 50 in this embodiment are described for the right foot so that the pedal engagement portion 23 and the cleat engagement portion 53 engage in an engagement direction S1 and release in a release direction S2. However, it goes without saying that for the left foot, the various configurations are modified so that the engagement direction S1 and the release direction S2 of the pedal engagement portion 23 and the cleat engagement portion 53 are opposite. In addition, the orientation of the pedal engagement portion 23 and the cleat engagement portion 53 may be changed so that the pedal engagement portion 23 and the cleat engagement portion 53 are engaged by rotating the heel outward, and the engagement between the pedal engagement portion 23 and the cleat engagement portion 53 is released by rotating the heel inward. It goes without saying that the pedals and cleats in this embodiment can be freely combined with the above-described embodiments and their modifications.

[0059] The following additional notes are provided regarding the above-described embodiment. (Appendix 1) A pedal that can be attached to and detached from a cleat, The pedal base and a pedal rotation connection portion that is provided on the pedal base portion and connects to the cleat, allowing the pedal to rotate relative to the cleat around a rotation axis that extends in a thickness direction of the pedal base portion; a plurality of pedal engagement portions provided on the pedal base portion and releasably engaging with the cleat in a circumferential direction around the rotation axis, A pedal in which the plurality of pedal engagement portions are provided at positions connecting the vertices of a polygon, and the rotation axis passes through an inner region of the polygon.

[0060] (Appendix 2) A pedal as described in Appendix 1, wherein the outermost edge of the pedal engagement portion in the radial direction from the rotation axis is a single point or a curve in the circumferential direction.

[0061] (Appendix 3) A pedal according to claim 1 or 2, wherein the distances between at least two of the pedal engagement portions and the rotation axis are the same.

[0062] (Appendix 4) A pedal according to any one of claims 1 to 3, wherein the distances between the pedal engagement portions and the rotation axis are all the same.

[0063] (Appendix 5) At least three or more pedal engagement portions are provided, 5. The pedal according to claim 1, wherein the at least three pedal engagement portions are arranged at equal intervals in the circumferential direction.

[0064] (Appendix 6) The pedal engagement portion is a pedal engaging claw portion at least a portion of which extends in the circumferential direction; 6. The pedal according to any one of claims 1 to 5, comprising:

[0065] (Appendix 7) 7. The pedal according to claim 6, wherein a pedal hole portion is formed in the pedal base portion near the pedal engaging claw portion.

[0066] (Appendix 8) The pedal described in Appendix 7, wherein the pedal hole portion is provided at a position on the pedal base portion opposite the pedal engaging claw portion.

[0067] (Appendix 9) A pedal as described in Appendix 7 or Appendix 8, wherein the pedal hole portion is provided from the pedal engagement portion to the front in the direction of rotation about the rotation axis, and the cleat engagement portion provided on the cleat is configured to enter the front pedal hole portion and to be able to engage and disengage with the pedal engagement portion in the direction of rotation.

[0068] (Appendix 10) A pedal according to any one of claims 6 to 9, wherein the pedal engagement claw portion extends parallel to or obliquely upwardly relative to the pedal base portion.

[0069] (Appendix 11) The pedal according to any one of Supplementary Note 1 to Supplementary Note 10, wherein the pedal rotation connection portion includes a pedal rotation connection peripheral wall portion provided on the pedal base portion, the inner surface of which is a circumferential surface or a polygonal surface, and the cleat is disposed inside the pedal rotation connection peripheral wall portion, and the circumferential surface or the polygonal surface is configured to guide the rotation of the cleat.

[0070] (Appendix 12) A pedal as described in any one of appendixes 1 to 11, wherein the pedal rotation connection portion is rotatable relative to the cleat while being attracted to the cleat by magnetic force.

[0071] (Appendix 13) A pedal as described in any one of Supplementary Note 1 to Supplementary Note 12, comprising a pedal engagement fixing portion that fixes engagement of the pedal engagement portion with the cleat.

[0072] (Appendix 14) A cleat that can be attached to and detached from a pedal, a cleat base portion; a cleat rotation connection portion that is provided on the cleat base portion and connected to the pedal to enable relative rotation with respect to the pedal about a rotation axis that extends in a thickness direction of the cleat base portion; a plurality of cleat engagement portions provided on the cleat base portion and releasably engaging with the pedal in a circumferential direction around the rotation axis, A cleat in which the plurality of cleat engagement portions are provided at positions connecting the vertices of a polygon, and the rotation axis passes through an inner region of the polygon.

[0073] (Appendix 15) A pedal according to any one of claims 1 to 13; The cleats described in Appendix 14 and A pedal system comprising:

[0074] (Appendix 16) A pedal according to any one of claims 1 to 13; a bicycle body on which the pedals are provided; A bicycle equipped with:

[0075] (Appendix 17) The pedal engagement portion is a pedal engaging wall portion rising from the pedal base portion; a pedal engaging claw portion at least partially extending in the circumferential direction from the pedal engaging wall portion; 6. The pedal according to any one of claims 1 to 5, comprising:

[0076] (Appendix 18) 9. The pedal according to claim 7 or 8, wherein the area of ​​the inner surface of the pedal engagement claw portion is the same as or smaller than the area of ​​the opening of the pedal hole portion.

[0077] (Appendix 19) A pedal as described in any one of Appendix 17, Appendix 7, Appendix 8 or Appendix 18, wherein the pedal engaging claw portion is circular and the pedal engaging wall portion is arc-shaped.

[0078] (Appendix 20) The cleat has a cleat engagement portion that is releasably engaged with the pedal engagement portion, 14. The pedal according to any one of claims 1 to 13, wherein the pedal engagement portion and the cleat engagement portion have the same shape and number. [Explanation of symbols]

[0079] 1. Bicycle 2 Bicycle body 3,3A,3B,3C,3D,3E,3F,3G Pedal System 10, 10A, 10B, 10C, 10D, 10E, 10F, 10G Pedals 21 Pedal base 211 Pedal hole 22,22G Pedal rotation connection 221 Pedal recess 222 Pedal rotation connection magnet part 222G Pedal rotation connection peripheral wall 23 Pedal engagement part 231, 231a, 231b, 231c, 231F, 231G Pedal engagement claw 232 Pedal engagement wall 234 outermost edge 24 Pedal engagement fixing part 50, 50A, 50B Cleats 51 Cleat base 52,52F cleat rotation connection 53 Cleat engagement portion N rotation axis S circumferential direction T polygon T1 medial area

Claims

1. A pedal that can be attached to and detached from a cleat, The pedal base and a pedal rotation connection portion that is connected to the cleat and allows the pedal to rotate relative to the cleat around a rotation axis that extends in the thickness direction of the pedal base portion; a plurality of pedal engagement portions each having a pedal engagement claw portion at least a portion of which extends in the circumferential direction and which are detachably engaged with the cleat in a circumferential direction around the rotation axis; The pedal engagement portions are provided at positions connecting vertices of a polygon, and the rotation axis passes through an inner region of the polygon. The pedal has a pedal hole formed in the pedal base portion at a position facing the pedal engaging pawl.

2. 2. The pedal according to claim 1, wherein the pedal hole portion is provided from a position opposite the pedal engagement portion to a position forward in the rotational direction about the rotation axis, and the cleat engagement portion provided on the cleat is configured to enter the front pedal hole portion and engage with the pedal engagement portion in a manner that allows it to be engaged and disengaged in the rotational direction.

3. 3. The pedal according to claim 1, wherein an outer edge of the pedal base portion is cut out together with the pedal hole portion.

4. 4. The pedal according to claim 1, wherein the pedal engaging claw extends obliquely upward with respect to the pedal base portion.

5. A pedal that can be attached to and detached from a cleat, The pedal base and a pedal rotation connection portion that is connected to the cleat and allows the pedal to rotate relative to the cleat around a rotation axis that extends in the thickness direction of the pedal base portion; a plurality of pedal engagement portions that are detachably engaged with the cleats in a circumferential direction around the rotation axis, The pedal engagement portions are provided at positions connecting vertices of a polygon, and the rotation axis passes through an inner region of the polygon. The pedal rotation connection portion is magnetically attracted to the cleat and is rotatable relative to the cleat.

6. A cleat that can be attached to and detached from a pedal, a cleat base portion; a cleat rotation connection portion that is connected to the pedal and allows relative rotation with respect to the pedal about a rotation axis that extends in a thickness direction of the cleat base portion; a plurality of cleat engagement portions that are releasably engaged with the pedal in a circumferential direction around the rotation axis, the cleat engagement portions having cleat engagement claws at least a portion of which extends in the circumferential direction; The cleat engagement portions are provided at positions connecting vertices of a polygon, and the rotation axis passes through an inner region of the polygon, The cleat has a cleat hole formed in the cleat base portion at a position facing the cleat engagement claw portion.

7. 7. The cleat according to claim 6, wherein the cleat rotational connection portion comprises a cleat rotational connection peripheral wall portion whose inner surface is a circumferential surface or a polygonal surface, and the pedal is disposed inside the cleat rotational connection peripheral wall portion, and the circumferential surface or the polygonal surface is configured to guide the rotation of the pedal.

8. A cleat that can be attached to and detached from a pedal, a cleat base portion; a cleat rotation connection portion that is connected to the pedal and allows relative rotation with respect to the pedal about a rotation axis that extends in a thickness direction of the cleat base portion; a plurality of cleat engagement portions that are detachably engaged with the pedal in a circumferential direction around the rotation axis, The cleat engagement portions are provided at positions connecting vertices of a polygon, and the rotation axis passes through an inner region of the polygon, The cleat has a rotational connection portion that is magnetically attracted to the pedal and can rotate relative to the pedal.

9. A pedal according to any one of claims 1 to 5; The cleat according to any one of claims 6 to 8, A pedal system comprising:

10. A pedal according to any one of claims 1 to 5; a bicycle body on which the pedals are provided; A bicycle equipped with:

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