Pedal, cleat, pedal system, and bicycle

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

Pedals, cleats, pedal systems and bicycles

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

[0002] Conventionally, bicycles in which cleats attached to shoes are connected to pedals are known (see, for example, Patent Document 1). One such bicycle is equipped with a disconnection mechanism that connects the cleat to the pedal by placing the shoe with the cleat attached on the pedal and stepping down on the shoe in the direction of the pedal's thickness, and then disconnects the cleat from the pedal by rotating the cleat.

[0003] Japanese Patent Application Laid-Open No. 2003-095175

[0004] However, with bicycles like this, the procedures for connecting and disconnecting the cleats from the pedals are different, making it difficult for riders to intuitively perform the connection and disconnection actions. Furthermore, applying a strong force in the opposite direction (upward) of the pedal's thickness can cause the cleats to disconnect, so to prevent this, the pedal's connecting force must be strong. However, a problem with strong connecting force is that a strong force is also required to disconnect the cleats.

[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.

[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.

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

[0008] 1 is a side view showing a bicycle and pedals according to an embodiment of the present invention. 2 is an explanatory diagram showing a pedal system according to an embodiment of the present invention. 3 is a plan view showing the binding of FIG. 2. 4 is a cross-sectional view showing how the binding and cleat are coupled together, with the cross-section of the cleat facing the cross-section of line A-A of FIG. 3. 5 is an enlarged perspective view of the binding and cleat of FIG. 3. 6 is an explanatory diagram showing the outermost edge and outermost circular arc trajectory of the pedal engagement portion and cleat engagement portion of FIG. 2. 7 is an enlarged plan view of the pedal engagement portion of FIG. 3. 8 is an enlarged perspective view of the pedal engagement portion of FIG. 3. 9 is a partially cutaway cross-sectional view of the binding and cleat of FIG. 5 when they are brought even closer together, where (A) is an explanatory diagram showing the state before the binding and cleat are engaged, and (B) is an explanatory diagram showing the state after the binding and cleat are engaged. 10 is an explanatory diagram showing modified pedal engagement portions and cleat engagement portions. 11 is a perspective view showing a first modified example of the pedal system of FIG. 2. 12 is a diagram showing the pedal system of FIG. 11, where (A) is a cross-sectional view showing the binding and cleat facing each other, and (B) is a cross-sectional view showing the binding and cleat coupled together. 21A and 21B are diagrams showing a second modified example of the pedal of FIG. 2, where (A) is a perspective 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 coupled together. A cross-sectional view showing a third modified example of the pedal system of FIG. 4. A cross-sectional view showing a fourth modified example of the pedal system of FIG. 4. A perspective view showing a fifth modified example of the pedal system of FIG. 5. An explanatory view showing a sixth modified example of the pedal system of FIG. 2. An explanatory view showing a seventh modified example of the pedal system of FIG. 2. A perspective view showing an eighth modified example of the pedal system of FIG. 5. A perspective view showing a state in which the cleat and the binding of FIG. 19 are coupled together. A perspective view showing a ninth modified example of the pedal system of FIG. 5. A perspective view showing the pedal system of FIG. 21 as viewed obliquely from below. A partially cutaway view of the pedal system of FIG. 21, where (A) is a perspective view showing a state before engagement, and (B) is a perspective view showing a state in which engagement is achieved. A perspective view showing a modified example of the cleat rotational connection peripheral wall portion of FIG. 21. A perspective view showing a tenth modified example of the pedal system of FIG. 5. A perspective view showing a modified example of the pedal system of FIG. 25.

[0009] (Embodiments) Pedals, cleats, pedal systems, and bicycles according to embodiments of the present invention will now be described. FIG. 1 is a side view of a pedal and bicycle according to an embodiment of the present invention. FIG. 2 is an explanatory diagram of a pedal system 3. Bicycle 1 includes a bicycle main body 2 and pedal system 3 (shown in FIG. 2). Bicycle main body 2 includes a frame 2a, handlebars 2b, a front wheel 2c, a saddle 2d, a rear wheel 2e, a chainwheel 2f, a chain 2g, and a crank 2h. Handlebars 2b are provided on the front side of frame 2a. Front wheel 2c is provided on the front side of frame 2a, below handlebars 2b. Saddle 2d is provided on the rear side of frame 2a. Rear wheel 2e is provided on the rear side of frame 2a, below saddle 2d. Chainwheel 2f is provided on the lower side of frame 2a, and chain 2g is looped between chainwheel 2f and rear wheel 2e. Crank 2h is provided on chainwheel 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, he or she depresses the pedal 10 to rotate the crank portion 2h, which causes the rear wheel 2e to rotate 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 via a connecting portion (not shown). The binding 20 and the cleat 50 for the right foot and the left foot have different orientations of the pedal engagement portion 23 and the cleat engagement portion 53 (described later) on one side of the circumferential direction S. However, since the other main components are the same, the binding for the right foot will be described here. As shown in FIGS. 3 to 8 , the binding 20 includes a pedal base 21, a pedal rotation connection portion 22, and a pedal engagement portion 23. The pedal base 21 is made of a metal such as iron and has a circular plate shape. Note that the symbol P indicates the center point of the pedal base 21. A pedal rotation connection portion 22 is provided in the center of the pedal base portion 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 portion 21. That is, the pedal recess 221 is provided so as to be rectangularly recessed in the thickness direction of the pedal base portion 21 in a side view. Furthermore, the pedal recess 221 is provided concentrically with the pedal base portion 21 around the center point P. A pedal rotation connection magnet portion 222 is provided in this pedal recess 221. The pedal rotation connection magnet portion 222 is made of a disk-shaped magnet. That is, the pedal rotation connection magnet portion 222 is provided concentrically with the pedal base portion 21. One of the main surfaces (pedal connection surface) 223 of this pedal rotation connection magnet portion 222 and one of the main surfaces (cleat connection surface) 523 of the cleat rotation connection magnet portion 522 described later are removably 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 interface surface 223 of the pedal rotation connection magnet portion 222 is the same as the contact area of ​​the cleat interface surface 523 of the cleat rotation connection magnet portion 522. The pedal interface surface 223 and the cleat interface surface 523 are each provided with anti-crack sheets 224, 524 to prevent cracking. 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 connecting the vertices of a polygon T in a plan view. In other words, the pedal engagement portions 23 are disposed 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 the 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 from the center point P in the thickness direction. The center point 233 of each 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, so the polygon T is a rectangle. Furthermore, in a plan view, the distance L3 between at least two or more center points 233 and the rotation axis N is the same. In this embodiment, the distance L3 between the center point 233 and the rotation axis N is all the same. Therefore, the polygon T is a square. Furthermore, the 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. That is, the pedal engagement portions 23 are provided at equal intervals in the circumferential direction S with the rotation axis N extending from the center point of the pedal rotation connection portion 22 in the thickness direction as the rotation center.

[0012] The pedal engagement portion 23 engages and disengages with 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 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 engagement wall portion 232, pedal engagement portion 23, and 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 a 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 of which is set at a single point. The outermost edge 234 is the radially outermost portion of the edge of the pedal engaging claw 231 that is located on a radial line P1 extending radially from the center point P in a plan view. In other words, when the pedal engaging claw 231 rotates around the rotation axis N, the outermost edge 234 describes the outermost circular arc locus R1 of the pedal engaging claw 231. Similarly, the innermost edge 235 is the radially innermost portion of the edge of the pedal engaging claw 231 that is located on the radial line P1. That is, when the pedal engaging claw 231 rotates about the rotation axis N, the innermost edge 235 describes an innermost circular arc locus R2 on the innermost side of the pedal engaging claw 231. The radial line P1 is an imaginary line extending radially from the center point P. Furthermore, reference numeral 533 denotes the outermost edge of the cleat engaging portion 53, and reference numeral 534 denotes the innermost edge of the cleat engaging 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 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 232 is formed in an arc shape with the center of rotation being the center point 233 of the pedal engaging claw 231. The inner peripheral surface 238 of the pedal engaging wall 232 is also formed in an arc shape. This 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 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 engagement direction S1 side between the outermost edge 234 and the innermost edge 235 of the circumferential edge of the pedal engaging claw 231. In addition, the height dimension of the pedal engaging wall 232 is equal to or greater than the thickness dimension of the cleat engaging claw 531, which will be described later.

[0016] As shown in FIGS. 7 and 8 , the pedal base portion 21 is provided with a pedal hole 211 penetrating the pedal base portion 21 near the pedal engagement portion 23. The pedal hole 211 is located opposite the pedal engagement claw 231 in the thickness direction. The pedal hole 211 is circular and is arranged concentrically with the pedal engagement claw 231 around a center point 233. The diameter r1 of the pedal engagement claw 231 is equal to or smaller than the diameter r2 of the pedal hole 211. That is, the area of ​​the inner surface 236 of the pedal engagement claw 231 is equal to or smaller than the opening area of ​​the pedal hole 211. The inner peripheral surface 238 of the pedal engagement wall 232 extends radially inward of the pedal hole 211 and is flush with the outer peripheral surface 237 of the pedal engagement 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 engaging claw 231, the inner circumferential surface 238 of the pedal engaging 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 engaging claw 231. Furthermore, because the height dimension of the pedal engaging wall 232 is the same as or larger than the thickness dimension of the cleat engaging 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 engaging claw 531.

[0017] As shown in FIG. 2 , the cleat 50 is mounted on the bottom SH1 of the shoe SH. The bottom SH1 has a recess SH2, and the cleat 50 is mounted in the recess SH2 so that it is recessed from the bottom SH1 into the shoe SH and does not protrude downward from the bottom SH1. Note that the cleat 50 may also protrude downward from the bottom 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 upside down relative to the binding 20. That is, the cleat base portion 51, the cleat rotational connection portion 52, and the cleat engagement portion 53 have the same shape and size as the pedal base portion 21, the pedal rotational 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 those of the cleat engagement portions 53. Therefore, a description of the cleats 50 will be omitted here. 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. Reference numeral 524 denotes a crack prevention sheet. The cleat rotation connection magnet portion 522 and the pedal rotation connection magnet portion 222 are arranged so that their magnets have opposite polarities when they are upside down and facing each other.

[0018] Next, a description will be given of how to use the pedal 10, cleat 50, pedal system 3, and bicycle 1 according to an embodiment of the present invention. As shown in Figure 1, when a rider sits on the saddle 2d, grips the handlebars 2b, and steps on the pedal 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 pedal 10, causing the bicycle 1 to move forward. At this time, by engaging the pedal 10 with the cleat 50, the force pulling down on the pedal 10 and the force pulling up on the pedal 10 can be effectively utilized.

[0019] Here, we will explain how the pedal 10 and cleat 50 are connected. 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 interface surface 223 of the pedal rotation connection magnet portion 222 and the cleat interface surface 523 of the cleat rotation connection magnet portion 522 are attracted to each other by magnetic force and connected to each other. When the magnets have the same shape and area but different polarities, when they are attracted to each other and connected to each other by magnetic force, they have the ability to align their central axes extending in the thickness direction and always connect in the same relative position without any radial shift in the relative positions of the interface surfaces. In other words, such a pair of magnets always connects to each other in the same relative position with their central axes aligned. That is, the pedal interface surface 223 and the cleat interface surface 523 always connect to each other in the same relative position with their 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 the two.

[0020] Furthermore, when the mating surfaces of the magnets are joined together, a large force is required to separate the mating surfaces by moving them parallel to each other in the direction of the central axis. In contrast, even when the mating surfaces are joined together, a smaller force is required to rotate them relative to each other about the central axis. Therefore, even when the pedal mating surface 223 and the cleat mating surface 523 are joined together by magnetic attraction, the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 can easily rotate relative to each other around the rotation axis N. In other words, simply by placing the rider's shoe SH on the pedal 10 and magnetically attracting and joining the pedal mating surface 223 and the cleat mating surface 523, the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 can easily rotate relative to each other around the rotation axis N by simply rotating the rider's heel toward the inside of the bicycle body 2. Relative rotation means that the pedal rotation connection part 22 and the cleat rotation connection part 52 rotate relative to each other, 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 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 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-described steps. That is, when the rider rotates his / her 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. Even if the mating surfaces of the magnets are joined together, a smaller force is required to separate them in a direction intersecting the central axis than to separate them in a direction parallel to the central axis, as described above. Therefore, when the rider slides his / her shoe SH in a direction intersecting the rotation axis N or lifts his / her heel, the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 are separated, easily releasing the connection between the pedal 10 and the cleat 50.

[0023] As described above, with the pedal 10, cleat 50, pedal system 3, and bicycle 1 of this embodiment, when the rider places their shoe SH on the pedal 10 and engages the pedal rotational connection portion 22 with the cleat rotational connection portion 52, the rider can quickly and easily engage and disengage the pedal engagement portion 23 with the cleat engagement portion 53 in the circumferential direction S by simply rotating their heel. Therefore, simply by performing the simple action of rotating their heel in either direction, the pedal 10 and the cleat 50 can be quickly and easily connected and disengaged. Furthermore, because the pedal engagement portion 23 is located at a position connecting the vertices of the polygon T, two forces (vertical forces) - a force pushing the pedal 10 downward and a force pulling the pedal 10 upward with the foot - can be stably transmitted between the cleat 50 and the pedal 10 when pedaling the pedal 10. That is, when the shoe SH is placed on the pedal 10 and moved up and down, the load may fluctuate back and forth, left and right, etc., due to various conditions such as vibration and tilt. However, because the pedal engagement portions 23 are located two-dimensionally at positions connecting the vertices of the polygon T, rather than one-dimensionally on a straight line, the load can be supported two-dimensionally from the vertices of the polygon T, even if the load tends to fluctuate, and vertical force can be transmitted stably. Furthermore, because 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, and vertical force can be transmitted more stably. Furthermore, because the distance L3 between at least two or more pedal engagement portions 23 and the rotation axis N is the same, two forces, that is, the force pushing down on the pedal 10 and the force pulling up on the pedal 10, can be transmitted more stably between the cleat 50 and the pedal 10. Furthermore, because the distance dimension L3 between the pedal engaging portion 23 and the rotation axis N is the same for all pedal engaging portions 23, the two forces of pushing the pedal 10 downward and pulling it upward with the foot can be transmitted more stably between the cleat 50 and the pedal 10. Furthermore, because the pedal engaging portion 23 includes the pedal engaging wall portion 232 and the pedal engaging claw portion 231, the pedal engaging portion 23 and the cleat engaging portion 53 can be quickly and easily engaged and disengaged in the engagement space K between the pedal engaging claw portion 231 and the pedal base portion 21.

[0024] Furthermore, because the pedal hole 211 is formed near the pedal engagement 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 engagement portion 23 and the cleat engagement portion 53, preventing any degradation of fit during engagement due to foreign matter. Furthermore, the pedal hole 211 makes it easy to clean the inner surface 236 of the pedal engagement claw 231 and the inner circumferential surface 238 of the pedal engagement wall 232. Furthermore, even if the binding 20 heats up and expands (atomic expansion), for example, in the summer, the pedal hole 211 prevents the green 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 engagement portion 23 and the cleat engagement portion 53, even under changing temperature conditions. Furthermore, the pedal hole 211 contributes to reducing the weight of the pedal 10.

[0025] Furthermore, 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 discharged through the holes of the same shape. Furthermore, in order to minimize 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, because the area of ​​the inner surface 236 of the pedal engaging claw 231 is smaller than the opening area of ​​the pedal hole 211, not only can foreign matter adhering to the inner surface 236 of the pedal engaging claw 231 be efficiently and naturally discharged through the large holes 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 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 portion 21 and the pedal engagement portions 23 have the same shapes as the cleat base portion 51 and the cleat engagement portions 53, respectively, the bindings 20 can be used as cleats 50, and the cleats 50 can be used as bindings 20. This not only reduces manufacturing costs but also improves convenience in repair, replacement, storage, and the like. Furthermore, because the shape and number of the pedal engagement portions 23 are the same as the shape and number of the cleat engagement portions 53, the simplified configuration reduces manufacturing costs.

[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 Figure 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 trajectory R1 does not extend 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, because the pedal rotation connection portion 22 is magnetically attracted to the cleat rotation connection portion 52 and is rotatable relative to the cleat rotation connection portion 52, the rider can easily couple and release the pedal 10 and cleat 50 simply by placing or releasing the shoe SH on or from the pedal 10. Furthermore, because the pedal rotation connection portion 22 is equipped with a pedal rotation connection magnet portion 222, the rider can easily couple and release the pedal 10 and cleat 50 simply by placing or releasing the shoe SH on or from the pedal 10. Furthermore, because the pedal rotation connection magnet portion 222 is made of a disk-shaped magnet and the area of ​​the pedal interface surface 223 is the same as the area of ​​the cleat interface surface 523, the rider can easily align the rotation axes N of the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 and connect them together simply by placing the shoe SH on the pedal 10, without the rider having to consciously try to align the rotation axes N of the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522. Furthermore, because the pedal engagement portions 23 are provided in plurality 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 a balanced manner in the circumferential direction S, and the two forces of pushing the pedal 10 downward with the foot and pulling it upward can be efficiently transmitted in a balanced manner between the cleat 50 and the pedal 10. Furthermore, because the pedal engagement claws 231 extend parallel to the pedal base 21 in side view, the pedal engagement portions 23 and the cleat engagement portions 53 can be quickly and easily engaged and disengaged.

[0029] The cleats 50 can also provide the same effects as those of the pedals 10. The pedal system 3 includes the pedals 10 and the cleats 50, allowing the pedals 10 and the cleats 50 to be quickly and easily engaged and disengaged. The bicycle 1 includes the pedals 10 and the bicycle body 2, allowing the rider, while seated on the saddle 2d and gripping the handlebars 2b, to quickly and easily engage the pedals 10 and the cleats 50 simply by rotating their heels while moving forward, and also allowing the rider to quickly and easily disengage the pedals 10 and the cleats 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 modified version of the above-described embodiment. In FIGS. 11 and 12, the same components as those shown in FIGS. 1 to 10 are designated by the same reference numerals, and their description will be omitted. This modified version has the same basic configuration as the above-described embodiment, and the following mainly describes the differences. The pedal system 3A includes a pedal 10A and a cleat 50A. The pedal 10A includes a binding 20A made of a metal such as iron. The binding 20A includes a disc-shaped pedal base 21A. A pedal rotation connection portion 22A is provided in the center of the pedal base 21A. The pedal rotation connection portion 22A includes a circular pedal recess 221A. The pedal recess 221A is spherically recessed in the thickness direction of the pedal base 21A on the side opposite the installation side where the pedal engagement portion 23 is provided. That is, in side view, the pedal recess 221A is recessed in a circular shape on the opposite side in the thickness direction of the pedal base unit 21A. 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 toward 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 is provided in the center of the pedal recess 221A to exclude foreign matter such as dust. This pedal exclusion portion 221A1 is a through hole, allowing foreign matter in the pedal recess 221A to fall through the pedal exclusion portion 221A1. The pedal rotation connection magnet portion 222 is not provided. Three pedal engagement portions 23 are provided in the circumferential direction S, and the polygon T is an equilateral triangle.

[0031] The cleat 50A includes a disc-shaped cleat base portion 51A. A cleat rotation connection portion 52A is provided at the center of the cleat base portion 51A. The cleat rotation connection portion 52A includes a circular cleat protrusion 521A. The cleat protrusion 521A is provided so as to protrude spherically toward the installation side of the cleat base portion 51A in the thickness direction, where the cleat engagement portion 53 is provided. In other words, the cleat protrusion 521A is provided so as to protrude circularly toward the installation side of the cleat base portion 51A in the thickness direction, when viewed from the side. In other words, the cleat engagement portion 53 is provided on one of the two main surfaces of the cleat base portion 51A, and the cleat protrusion 521A is provided so as to protrude toward the one main surface. Furthermore, the cleat protrusion 521A is provided concentrically with the cleat base portion 51A, with the center point P as the center. A cleat removal portion 521A1 is provided at the center of the cleat protrusion 521A. The cleat removal portion 521A1 is a through-hole that allows foreign matter inside the cleat protrusion 521A to fall through the cleat removal portion 521A1. The cleat rotation connection magnet portion 522 is not provided. 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 FIG. 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 FIG. 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 axis 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 enable the pedal 10A and cleat 50A to be quickly and easily connected and disconnected with a simple configuration. Furthermore, since foreign objects 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 objects, 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 retract in an inverted cone shape. That is, the cleat protrusions 521A and the pedal recesses 221A may each protrude and retract in a triangular shape in the thickness direction of the pedal base 21 in side view. The cleat protrusions 521A and the pedal recesses 221A may each protrude and retract in a rectangular or elliptical shape in side view. The cleat protrusions 521A and the pedal recesses 221A do not have to have the same shape, and may have different shapes.

[0034] Various other modifications are also possible to the above embodiment and modified examples. For example, the pedal engagement portion 23 is described as being located at a position connecting the vertices of a polygon T, with the rotation axis N passing through the inner region T1. However, this is not limited to this, and the configuration can be modified as appropriate. For example, the rotation axis N may not pass through the inner region T1 of the polygon T but may pass through an outer region thereof. Although the polygon T is described as being drawn by connecting the center points 233 of the pedal engagement portions 23, this is not limited to this, and the configuration can be modified as appropriate. For example, the distal end, proximal end, one or other end in the width direction of the pedal engagement portion 23, etc. may be selected and connected, or an arbitrary point on the pedal engagement portion 23 may be selected and connected. Furthermore, different points on multiple pedal engagement portions 23 may be selected and connected. Furthermore, although the distance L3 between two or more pedal engagement portions 23 and the rotation axis N is described as being the same, this is not limited to this, and all of the distances L3 may be different. Furthermore, although the distance L3 between the pedal engagement portion 23 and the rotation axis N is set to be the same for all pedal engagement portions 23, this is not a limitation and all distances L3 may be different. Furthermore, although the pedal engagement portion 23 is set to include a pedal engagement claw 231 and a pedal engagement wall 232, this is not a limitation and the configuration may be modified as appropriate. Furthermore, although the pedal engagement claw 231 is set to extend parallel to the pedal base 21 in side view, this is not a limitation and the pedal engagement claw 231 may be set to be inclined obliquely downward or obliquely upward. Incidentally, if the pedal engagement claw 231 is set to be inclined obliquely upward, when the pedal engagement portion 23 is engaged with the cleat engagement portion 53, the pedal engagement claw 231 can enter the cleat hole 511, thereby strengthening the engagement force. Furthermore, although the length dimension in the circumferential direction S of the pedal engagement wall 232 is set to be equal to or less than half the circumference of the pedal engagement claw 231, this is not a limitation and the pedal engagement wall 232 may be set to be greater than half the circumference.Although the pedal engagement wall 232 is described as extending between the outermost edge 234 and the innermost edge 235 of the circumferential edge of the pedal engagement claw 231 in the engagement direction S1, this is not limited thereto and may extend beyond the gap between the outermost edge 234 and the innermost edge 235 into the release direction S2. Although the pedal base 21, the pedal engagement wall 232, and the pedal engagement claw 231 are described as being integrally formed, this is not limited thereto and each may be attached as a separate member. Although the pedal base 21 is described as being made of metal, this is not limited thereto and the material may be changed as appropriate, for example, to resin. Although the pedal base 21 is described as being disc-shaped, this is not limited thereto and the configuration may be changed as appropriate. For example, the pedal base 21 may be a polygonal shape such as a triangle or a rectangle, or an elliptical shape, or other shapes.

[0035] Furthermore, although the pedal hole portion 211 is described as being provided, this is not a limitation and the pedal hole portion 211 may not be provided. Although the pedal hole portion 211 is described as being provided near the pedal engaging claw portion 231, this is not a limitation and the position does not have to be near the pedal engaging claw portion 231 and can be changed as appropriate. Although the pedal hole portion 211 is described as being provided opposite the pedal engaging claw portion 231, this is not a limitation and the position does not have to be opposite the pedal engaging claw portion 231 and can be changed as appropriate. Although the pedal hole portion 211 is described as being a through-hole that penetrates the pedal base portion 21, this is not a limitation and the pedal hole portion 211 may be a recess that does not penetrate the pedal base portion 21. Although the pedal engaging claw portion 231 and the pedal hole portion 211 are described as having the same shape, this is not a limitation and the pedal hole portion 211 may have different shapes.

[0036] Although the pedal engagement claw 231 and the pedal hole 211 are described as being circular, this is not a limitation and their shapes can be modified as appropriate. For example, they may be rectangular, triangular, elliptical, or other shapes. Although the area of ​​the inner surface 236 of the pedal engagement claw 231 is described as being smaller than the opening area of ​​the pedal hole 211, this is not a limitation and their areas can be modified 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 areas may be the same. Although the pedal engagement claw 231 is described as being circular and the pedal engagement wall 232 is described as being arc-shaped, this is not a limitation and their shapes can be modified as appropriate. Although the pedal base 21 and the pedal engagement portion 23 are described as being identical in shape to the cleat base 51 and the cleat engagement portion 53, this is not a limitation and their shapes may be different. Furthermore, their sizes may also be different. Furthermore, while the shape and number of the pedal engagement portions 23 are described as being identical to those of the cleat engagement portions 53, this is not a limitation and the shapes and numbers may be different. Furthermore, while the engagement spaces K are described as being identical in shape and size to or larger than the pedal engagement claws 231 in plan view, this is not a limitation and the size of the engagement spaces K may be larger than that of the pedal engagement claws 231 by positioning the inner circumferential surface 238 of the pedal engagement wall 232 radially outward. This allows for play (margin) when the cleat engagement claws 531 are inserted into the engagement spaces K due to the difference in size. It is also possible to change the configuration so that there is no play for advanced riders, a little play for intermediate riders, and even more play for beginners.

[0037] Furthermore, although the pedal engagement portion 23 is circular and has 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, the pedal engagement claw 231b may have a polygonal, elliptical, or other shape and have a single outermost edge. Furthermore, instead of having a single outermost edge, the pedal engagement claw 231c may have an arc-shaped outer 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. 6, the outermost edge 234 may be provided at multiple points, so that the outermost circular arc path R1 extends radially outward. It goes without saying that the innermost edge 235 may be modified in the same manner as above. Furthermore, it goes without saying that the cleat engagement claws 531a, 531b, and 531c may be modified in the same manner.

[0038] Furthermore, while the pedal rotational connection portion 22 and the cleat rotational connection portion 52 are described as including the pedal rotational connection magnet portion 222 and the cleat rotational 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 rotational connection portion 22 and the cleat rotational connection portion 52 may include a rotational connection magnet portion. Furthermore, neither the pedal rotational connection portion 22 nor the cleat rotational connection portion 52 may include the pedal rotational connection magnet portion 222 nor the cleat rotational connection magnet portion 522. In addition, separate connection magnet portions made of magnets may be provided, and the two may be attracted to each other by the magnetic force of these connection magnet portions. Furthermore, while the pedal rotational connection portion 22 and the cleat rotational connection portion 52 are described as including the pedal recess 221 and the cleat recess 521, their 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 be absent, e.g., a flat surface. Although the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 are described as being circular, this is not limiting and their configurations can be modified as appropriate. Note that "attraction" does not necessarily mean that the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 are directly connected to each other, but may also mean that they are indirectly connected via an intervening member such as a protective member, or that they are attracted to each other due to space or the shape of the connection. Furthermore, while the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 are described as being disk-shaped magnets and 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 limiting and their configurations can be modified as appropriate. For example, their 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] Although the pedal engagement portions 23 are described as being provided in a plurality, this is not a limitation, and the configuration can be modified as appropriate. For example, the pedal engagement portion 23 may be one, two to three, or five or more. That is, when one pedal engagement portion 23 is provided, it is provided at a single point, not at a position connecting the long points of the polygon T. When two pedal engagement portions 23 are provided, it is provided at a position connecting a straight line, not at a position connecting the long points of the polygon T. Furthermore, although all pedal engagement portions 23 are described as being provided at equal intervals in the circumferential direction S, this is not a limitation, 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, and the other pedal engagement portions 23 may be 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 three or more pedal engagement portions 23 may be arranged at equal intervals in the circumferential direction S. Also, while the pedal 10 has been described as including a crank connecting shaft 30 and a binding 20, this is not limited thereto, and the pedal 10 may not include the crank connecting shaft 30. In other words, the pedal 10 may include only the binding 20. Needless to say, 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 modified as appropriate. For example, while the bicycle main body 2 is described as a two-wheeled vehicle having a front wheel 2c and a rear wheel 2e, it may also be a three-wheeled vehicle, a four-wheeled vehicle, or the like.

[0040] The configuration of the pedal system 3 can also 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 magnetically attractable material, such as iron, and the pedal rotation connection magnet 222 is attached to and detached from the bottom surface of the pedal recess 221 by magnetic force. A pedal stopper member 225 extending radially inward is provided at the edge of the pedal recess 221. The pedal stopper member 225 is ring-shaped 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 part 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 part 222, thereby restricting the pedal rotation connection magnet part 222 from moving outward in the direction of the rotation axis N. Note that 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, in the same manner 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 the shoes SH with the cleats 50B attached, or when the shoes SH are placed on the pedal 10B without the cleats 50B attached, the pedal rotation connection magnet portion 222 and the cleat rotation connection magnet portion 522 can be protected.

[0043] As shown in FIG. 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 are provided on the rear surfaces of the pedal base 21 and the cleat base 51, respectively, to cover the pedal recess 221 and the cleat recess 521. The pedal attraction plate 226 and the cleat attraction plate 526 are formed in a plate shape and are made of a magnetically attractable material, such as iron. This allows the pedal rotation connection magnet 222 and the cleat rotation connection magnet 522 to move in the direction of the rotation axis N, thereby achieving the same effect as described above. While FIGS. 14 and 15 show the pedal stopper member 225 and the cleat stopper member 525 formed in a ring shape, this is not a limitation and their shapes can be modified as appropriate. For example, they may be provided as multiple members in the circumferential direction, or may be polygonal (e.g., triangular or rectangular), elliptical, or other shapes. 14 and 15 , the pedal stopper member 225 and the cleat stopper member 525 are provided, but this is not a limitation 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, while 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 a limitation and they may be provided integrally with the pedal base portion 21 and the cleat base portion 51.

[0044] 16 , the binding 20 may include a pedal engagement fixing portion 24, and the cleat 50 may include a 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 engagement fixing portion 24 includes a pedal fixing protrusion 241 provided on the edge of the pedal recess 221. Multiple pedal fixing protrusions 241 are provided, and are equally spaced apart 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. Multiple cleat fixing recesses 541 are provided, and are equally spaced apart 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, and the engagement state between the pedal engagement portion 23 and the cleat engagement portion 53 is maintained. That is, when the pedal engagement portion 23 and the cleat engagement portion 53 are engaged, the pedal fixing convex portion 241 and the cleat fixing concave portion 541 fit together, 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 fitting between the pedal fixing convex portion 241 and the cleat fixing concave portion 541 disengages, allowing movement of both in the circumferential direction S. This prevents the engagement between the pedal engagement portion 23 and the cleat engagement portion 53 from loosening.

[0045] Although the pedal engagement fixing portion 24 and the cleat engagement fixing portion 54 are described as including the pedal fixing convex portion 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 include the pedal fixing recess, and the cleat engagement fixing portion 54 may include the cleat fixing convex portion. Alternatively, the pedal engagement fixing portion 24 may include the pedal fixing convex portion 241 and the pedal fixing recess, and the cleat engagement fixing portion 54 may include the cleat fixing recess 541 and the cleat fixing convex portion. Furthermore, the pedal engagement fixing portion 24 and the cleat engagement fixing portion 54 may each include only the pedal fixing convex portion and the cleat fixing convex portion that are offset in the circumferential direction S, and the abutment of these pedal fixing convex portion and cleat fixing convex portion restricts movement of the pedal engagement portion 23 and the cleat engagement portion 53 in the circumferential direction S. The installation positions of the pedal engagement fixing portion 24 and the cleat engagement fixing portion 54 can be modified as appropriate. For example, although the pedal engagement fixing portions 24 and the cleat engagement fixing portions 54 are described as being equally spaced apart in the circumferential direction S, they may be spaced apart at different intervals. Furthermore, the pedal engagement fixing portions 24 and the cleat engagement fixing portions 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. Alternatively, as shown in FIG. 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 the crank portion 2h. The pedal body 31 is formed in a plate shape, with the binding 20 attached to one main surface thereof. This allows the rider to place their shoe SH on the pedal 10D and easily rotate their heel, allowing the pedal 10D to be quickly and easily connected to the cleat 50. Alternatively, the pedal 10D may have bindings 20 attached to both the top and bottom surfaces of the pedal body 31. In FIG. 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] As shown in FIG. 19 , a pedal system 3E may include a pedal 10E and a cleat 50E. The outer edge of the pedal base 21 is notched. That is, the pedal base 21 is configured such that its outer edge is notched along with the pedal hole 211. The pedal hole 211 is located opposite the engagement claw 231 in the thickness direction. As shown in FIG. 7 , the pedal hole 211 may have an edge that extends along the entire periphery, or as shown in FIG. 19 , a portion of the edge may be notched. The pedal hole 211 minimizes deformation of the cleat 50E and binding 20E and contributes to weight reduction. A through-hole is provided in the center of the pedal rotation connection magnet 222, and the pedal rotation connection magnet 222 is fixed via a screw. The pedal engagement wall 232 is raised in a direction that intersects with the pedal base 21. That is, the pedal engagement wall 232 is inclined relative to the pedal base 21 in a side view. A pedal engagement claw 231 formed in a roughly semicircular shape is provided at the tip of the pedal engagement wall 232. Needless to say, the cleat 50E has a similar configuration. With this configuration, when the cleat 50E is rotated with the pedal rotation connection magnet 222 and the cleat rotation connection magnet 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 FIG. 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] As shown in FIGS. 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, the engagement portions 23F include pedal engagement claws 231F that extend linearly and obliquely upward from the pedal base 21. While the pedal engagement claws 231F are formed in a rectangular parallelepiped shape, this is not limitative and may be modified as appropriate. The radially outermost edge of each pedal engagement claw 231F is curved. However, this outermost edge does not have to be curved. A pedal hole 211 is provided in the pedal base 21 near the pedal engagement claws 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.

[0050] The pedal base 21 of the binding 20F is provided with a pedal engaging / fixing portion 24F. The pedal engaging / fixing portion 24F includes a pedal fixing through-hole 241F, a pedal fixing protrusion 242F, and a pedal fixing elastic portion 243F. The pedal fixing through-hole 241F is a circular through-hole formed in the pedal base 21. The opening area of ​​the pedal fixing through-hole 241F is larger on the back surface of the pedal base 21 and smaller on the front surface. The pedal fixing protrusion 242F is spherical and is disposed within the pedal fixing through-hole 241F from the back surface of the pedal base 21. The pedal fixing elastic portion 243F is made of an elastic member and biases the pedal fixing protrusion 242F from the back surface toward the front surface of the pedal base 21. As a result, in the natural state, an upper portion of the pedal fixing convex portion 242F protrudes 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 toward the back surface from above, it moves toward the back surface against the biasing force of the pedal fixing elastic portion 243F and retracts from the surface of the pedal base portion 21 into the pedal fixing through-hole 241F. Also, the pedal base portion 21 is formed with an attachment hole 213F for attachment to the crank connecting shaft 30.

[0051] The cleat base 51 is 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 will not be described here. Reference numeral 531F denotes a cleat engagement claw, reference numeral 511a denotes an opposing region, and reference numeral 511b denotes a front region. The cleat base 51 is provided with a cleat rotational connection portion 52F at its outer edge. The cleat rotational connection portion 52F is provided with a cylindrical cleat rotational connection peripheral wall 522F. The inner periphery of the cleat rotational connection peripheral wall 522F is a circumferential surface or a polygonal surface. The inner diameter of the cleat rotational connection peripheral wall 522F is set to be equal to or larger than the outer diameter of the cleat base 51. The cleat base 51 is also provided with a cleat engagement fixing portion 54F. The cleat engagement fixing portion 54F is a through-hole formed in the cleat base portion 51. The cleat base portion 51 also has an attachment hole 513F formed therein for attachment to the shoe SH. Note that neither the pedal 10F nor the cleat 50F is provided with a rotational connection magnet portion or the like.

[0052] With this configuration, as shown in FIG. 23A , as the cleat 50F approaches the pedal 10F, the pedal base 21 is positioned 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 positioned. 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, protruding from the surface of the pedal base 21 through the pedal fixing through-hole 241F and positioned within the cleat engagement / fixing portion 54F. Furthermore, when the cleat 50F is rotated in the reverse direction, the pedal engagement portion 23F and the cleat engagement portion 53F are disengaged. This allows the cleat engagement claw 531F and the pedal engagement claw 231F to engage with each other while elastically deforming. 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 required for engagement and disengagement, 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. However, if the cleat 50F and pedal 10F are upside down, the left and right sides will be reversed for the right and left feet. The cleat rotatable connection peripheral wall 522F may not be provided. The inner and outer shapes of the cleat rotatable connection peripheral wall 522F may be modified as appropriate. For example, the outer shape may be a polygon, such as a triangle or a rectangle, in a plan view, or other shapes. For example, as shown in FIG. 24 , the outer shape of the cleat rotatable connection peripheral wall 522F1 may be a rectangle in a plan view, forming a cube. The outer shape of the cleat rotatable connection peripheral wall 522F1 may also be cylindrical. A rotatable connection magnet may be provided on at least one of the pedal 10F and the cleat 50F. The cleat engagement fixing portion 54F and the pedal engagement fixing portion 24F may not be provided.

[0055] Alternatively, as shown in FIG. 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 for the left foot. The binding 20G is an upside-down version of the cleat 50F shown in FIG. 21 , and since the binding has the same basic configuration, a description thereof will be omitted. However, the binding 20G does not include a cleat engagement fixing portion 54F. Note that reference numerals 23G, 231G, 22G, and 222G denote a pedal engagement portion, a pedal engagement claw portion, a pedal rotation connection portion, and a pedal rotation connection peripheral wall portion. The pedal rotation connection peripheral wall portion 222G has the same configuration as the cleat rotation connection peripheral wall portion 522F. The cleat 50G includes a disc-shaped cleat base portion 51G. Three cleat engagement portions 53G are provided at equal intervals around the periphery of the cleat base portion 51G. The space between the cleat engagement portions 53G in the circumferential direction defines a front region 511b of the cleat hole 511. Each cleat engagement portion 53G includes a cleat engagement claw portion 531G. The cleat engagement claw portion 531G is formed at the circumferential front end of the cleat engagement portion 53G as an inclined surface whose thickness gradually decreases toward the circumferential front. The underside of the cleat engagement claw portion 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 disc shape and is adapted to be attached to the cleat base portion 51G. The cleat engagement fixing portion 54G includes a cleat fixing notch 541G extending 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 their heel outward, the pedal engagement claw 231G and the cleat engagement claw 531G are disengaged from each other. This achieves the same effect as described above. Furthermore, the provision of the cleat engagement fixing portion 54G allows the cleat engagement claw 531G and the pedal engagement claw 231G to be fixed in an engaged state, and they can be easily disengaged by simply rotating the cleat 50G outward.

[0057] The cleat 50G and the pedal 10G may be upside down. However, 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 222G may not be provided. The inner and outer shapes of the pedal rotation connection peripheral wall 222G may be modified as needed. For example, the outer shape may be a polygon, such as a triangle or a rectangle, when viewed from above, or other shapes. A rotation connection magnet may be provided on at least one of the pedal 10G or the cleat 50G. The number of cleat engagement portions 53G and cleat fixing notches 541G may be modified as needed. The cleat engagement fixing portion 54G may not be provided. The configuration of the cleat fixing notch 541G may be modified as needed. For example, as shown in FIG. 26 , the cleat engagement fixing portion 54G may not be notched, but may instead be 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 engagement lower protrusion 5411G formed thereon. The cleat engagement lower protrusion 5411G protrudes downward in an arc shape from the rear 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 lower protrusion 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, while the pedal rotational connection portions 22, 22G and the cleat rotational connection portions 52, 52F are described as being provided, this is not a limitation, and these pedal rotational connection portions 22, 22G and cleat rotational connection portions 52, 52F may not be provided. Furthermore, with the exception of Figures 24 and 25 , the binding 20 and cleat 50 in this embodiment have been described for a right foot so that the pedal engagement portion 23 and the cleat engagement portion 53 engage in an engagement direction S1 and disengage in a disengagement direction S2. However, it goes without saying that for a left foot, various configurations are modified so that the engagement direction S1 and the disengagement direction S2 of the pedal engagement portion 23 and the cleat engagement portion 53 are opposite. Furthermore, the orientations 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 disengaged 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 supplementary notes are further provided with respect to the above-described embodiments: (Supplementary Note 1) A pedal that is detachable from a cleat, comprising: a pedal base portion; 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 the thickness direction of the pedal base portion; and a plurality of pedal engagement portions that are provided on the pedal base portion and releasably engage with the cleat in a circumferential direction around the rotation axis, the plurality of pedal engagement portions being provided at positions connecting the vertices of a polygon, with the rotation axis passing through an inner region of the polygon.

[0060] (Supplementary Note 2) The pedal according to Supplementary Note 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] (Supplementary Note 3) The pedal according to Supplementary Note 1 or Supplementary Note 2, wherein the distances between at least two of the pedal engagement portions and the rotation axis are the same.

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

[0063] (Appendix 5) A pedal as described in any one of Appendices 1 to 4, wherein at least three or more pedal engagement portions are provided, and these at least three or more pedal engagement portions are provided at equal intervals in the circumferential direction.

[0064] (Supplementary Note 6) The pedal according to any one of Supplementary Notes 1 to 5, wherein the pedal engagement portion includes: a pedal engagement claw portion, at least a portion of which extends in the circumferential direction.

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

[0066] (Appendix 8) The pedal according to appendix 7, wherein the pedal hole portion is provided at a position on the pedal base portion opposite the pedal engaging pawl 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 forward in the direction of rotation about the rotation axis, and the cleat engagement portion provided on the cleat is configured to enter the forward pedal hole portion and to be able to engage and disengage with the pedal engagement portion in the direction of rotation.

[0068] (Supplementary Note 10) The pedal according to any one of Supplementary Notes 6 to 9, wherein the pedal engagement claw portion extends parallel to or inclined obliquely upward with respect to the pedal base portion.

[0069] (Appendix 11) A pedal as described in any one of Appendices 1 to 10, wherein the pedal rotation connection portion comprises 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] (Supplementary Note 12) The pedal according to any one of Supplementary Notes 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] (Supplementary Note 13) The pedal according to any one of Supplementary Notes 1 to 12, further comprising a pedal engagement fixing portion that fixes engagement of the pedal engagement portion with the cleat.

[0072] (Appendix 14) A cleat that is detachable from a pedal, comprising: a cleat base portion; a cleat rotational connection portion that is provided on the cleat base portion and connects to the pedal, allowing relative rotation with respect to the pedal around a rotational axis extending in the thickness direction of the cleat base portion; and a plurality of cleat engagement portions that are provided on the cleat base portion and detachably engage with the pedal in a circumferential direction around the rotational axis, wherein the plurality of cleat engagement portions are provided at positions connecting the vertices of a polygon, and the rotational axis passes through the inner region of the polygon.

[0073] (Supplementary Note 15) A pedal system comprising: the pedal according to any one of Supplementary Notes 1 to 13; and the cleat according to Supplementary Note 14.

[0074] (Supplementary Note 16) A bicycle comprising: a pedal according to any one of Supplementary Notes 1 to 13; and a bicycle body on which the pedal is provided.

[0075] (Appendix 17) A pedal as described in any one of Appendices 1 to 5, wherein the pedal engagement portion comprises: a pedal engagement wall portion that rises from the pedal base portion; and a pedal engagement claw portion that extends at least partially in the circumferential direction from the pedal engagement wall portion.

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

[0077] (Appendix 19) The pedal according to any one of appendix 17, appendix 7, appendix 8, and appendix 18, wherein the pedal engaging claw portion is circular and the pedal engaging wall portion is arc-shaped.

[0078] (Supplementary Note 20) A pedal as described in any one of Supplementary Notes 1 to 13, wherein the cleat is provided with a cleat engagement portion that releasably engages with the pedal engagement portion, and the pedal engagement portion and the cleat engagement portions have the same shape and number.

[0079] REFERENCE SIGNS LIST 1 Bicycle 2 Bicycle main body 3, 3A, 3B, 3C, 3D, 3E, 3F, 3G Pedal system 10, 10A, 10B, 10C, 10D, 10E, 10F, 10G Pedal 21 Pedal base section 211 Pedal hole section 22, 22G Pedal rotation connection section 221 Pedal recess 222 Pedal rotation connection magnet section 222G Pedal rotation connection peripheral wall section 23 Pedal engagement section 231, 231a, 231b, 231c, 231F, 231G Pedal engagement claw section 232 Pedal engagement wall section 234 Outermost edge section 24 Pedal engagement fixing section 50, 50A, 50B Cleat 51 Cleat base section 52, 52F Cleat rotation connection section 53 Cleat engagement section N Rotation axis S Circumferential direction T Polygon T1 Inner region

Claims

1. A pedal that is detachable from a cleat, A pedal base part, a pedal rotation connection portion that is connected to the cleat and allows the pedal to rotate relative to the cleat about a rotation axis that extends in a thickness direction of the pedal base portion; a plurality of pedal engagement portions each having a pedal engagement claw portion that is detachably engaged with the cleat in a circumferential direction around the rotation axis, the pedal engagement claw portion having at least a portion that extends in the circumferential direction; 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 claw portion.

2. 2. The pedal as described in claim 1, wherein the pedal hole portion is provided from a position opposite the pedal engagement portion to a position forward in a rotational direction about the rotation axis, and a cleat engagement portion provided on the cleat is configured to enter the forward pedal hole portion and to engage with the pedal engagement portion in a manner that allows it to be 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 portion extends obliquely upward with respect to the pedal base portion.

5. A pedal that is detachable from a cleat, A pedal base part, a pedal rotation connection portion that is connected to the cleat and allows the pedal to rotate relative to the cleat about a rotation axis that extends in a thickness direction of the pedal base portion; a plurality of pedal engagement portions that 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, A pedal in which the pedal rotation connection portion is rotatable relative to the cleat while being attracted to the cleat by magnetic force.

6. A cleat that is detachable 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 with the rotation axis as a rotation center and have cleat engagement claw portions, 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 a position of the cleat base portion 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 such that the circumferential surface or the polygonal surface guides the rotation of the pedal.

8. A cleat that is detachable 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 with the rotation axis as a rotation center, 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 rotatable relative to the pedal while being attracted to the pedal by magnetic force.

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.