Fastener and hinge structure with same

Abstract

The invention provides a fastener which is good in workability during assembly. A fastener (55) is coupled to both ends of a shaft (53) inserted into a base (9) and a rotating body (33) in a state in which both ends protrude, and has: a base section (60) extending in the axial direction of the shaft; and a pair of engagement sections (61) provided at both ends of the base section and having first surfaces (63) facing each other, the pair of engagement sections each having: a housing hole (65) recessed from the first surface and having a bottom section (69) facing an end section of the shaft; a groove part (67) which extends from the accommodating hole to an edge part (71) of the clamping part and allows the end part of the shaft to pass through; and a locking part (77) which is provided in the groove part and locks the shaft.

Description

Technical Field

[0001] The present invention relates to a fastener and a hinge structure having the fastener. Background Art

[0002] Patent Document 1 discloses a hinge structure for rotatably connecting a seat to a seat box of a two-wheeled vehicle, which serves as a storage box. The hinge structure comprises a first hinge component mounted on the seat; a second hinge component mounted on the seat box; and a hinge shaft connecting the first and second hinge components. The hinge shaft comprises a shaft inserted into hinge holes provided in the first and second hinge components; and a nut threadedly engaged with the end of the shaft.

[0003] Patent Document 2 discloses a hinge structure for a vehicle. The hinge structure includes a first hinge component, a second hinge component, a shaft connecting the first and second hinge components, and a fastener coupled to the shaft. The shaft is inserted into hinge holes provided in the first and second hinge components, with its ends protruding. The fastener has a recessed portion for accommodating a bolt and is formed from a soft synthetic resin.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Utility Model Publication No. 61-036465

[0007] Patent Document 2: Japanese Utility Model Application Laid-Open No. 58-081270 Summary of the Invention

[0008] Problems to be solved by the invention

[0009] In order to assemble the hinge structure of Patent Document 1, a nut needs to be screwed onto the end of the shaft. This operation is complicated and has a problem of poor workability during assembly.

[0010] To assemble the hinge structure of Patent Document 2, the fastener's recessed portion must be stretched to expand while accommodating the shaft. The fastener is made of soft synthetic resin and is susceptible to degradation. Furthermore, this operation is cumbersome, resulting in poor assembly workability.

[0011] In view of the above background, an object of the present invention is to provide a fastener having good workability during assembly.

[0012] Solutions to Problems

[0013] In order to solve the above-mentioned problems, one solution of the present invention is a fastener 55, which is combined with the two ends of the shaft 53 inserted into the base 9 and the rotating body 33 in a state where the two ends protrude, and the fastener 55 has: a base 60, which extends along the axial direction of the above-mentioned shaft; and a pair of locking portions 61, which are arranged at the two ends of the above-mentioned base and have first surfaces 63 opposite to each other, and the above-mentioned pair of locking portions respectively have: a receiving hole 65, which is recessed from the above-mentioned first surface and has a bottom 69 opposite to the end of the above-mentioned shaft; a groove portion 67, which extends from the above-mentioned receiving hole to the edge portion 71 of the above-mentioned locking portion and allows the end of the above-mentioned shaft to pass through; and a locking portion 77, which is arranged in the above-mentioned groove portion and locks the above-mentioned shaft.

[0014] According to this aspect, the shaft can be locked in the receiving hole by press-fitting the fastener into the shaft from a predetermined direction. Therefore, a fastener with good workability during assembly can be provided.

[0015] In the above embodiment, a slit 73 may be provided in the bottom portion and the bottom part 72 of the groove. The slit 73 penetrates in the axial direction and extends in the extending direction of the groove to reach the edge of the engaging portion.

[0016] According to this aspect, when the fastener is press-fitted into the shaft, the engaging portion deforms, making it easier for the shaft to pass through the groove portion.

[0017] In the above embodiment, a lightening portion 75 penetrating in the axial direction may be provided between the receiving hole of the engaging portion and the base portion, and the slit may cross the receiving hole and reach the lightening portion.

[0018] According to this aspect, when the fastener is press-fitted into the shaft, the engaging portion is further easily deformed, thereby making it possible to couple the fastener and the shaft with further improved workability.

[0019] In the above aspect, the accommodation hole may be formed in a circular shape when viewed from the axial direction.

[0020] According to this aspect, the shaft can be easily rotated in the receiving hole, thereby facilitating the rotation of the rotating body relative to the base.

[0021] In the above embodiment, the locking portion may be an elastic claw 79 protruding into the groove.

[0022] According to this aspect, when the fastener is coupled to the shaft or when the fastener is removed from the shaft, the elastic claws are elastically deformed, thereby facilitating the shaft's passage through the groove.

[0023] In the above aspect, the elastic claw may include an inclined surface 78 protruding from the edge of the engaging portion toward the receiving hole into the groove portion, and a non-return surface 80 facing the receiving hole.

[0024] According to this solution, when the fastener is pressed into the shaft, the shaft is inserted into the groove along the inclined surface. This allows for efficient coupling of the fastener and shaft. Furthermore, when the shaft is received in the receiving hole, the non-return surface securely holds the shaft within the receiving hole. This reliably prevents the fastener from falling off the shaft.

[0025] In order to solve the above-mentioned problems, another solution of the present invention is a hinge structure 50, which rotatably connects a seat box 5 mounted on a straddle-type vehicle 1 and a seat 6 for opening and closing the seat box, the hinge structure 50 comprising: a shaft 53, which is inserted through the seat box and the seat with both ends protruding; and a fastener 55, which is coupled to both ends of the shaft, the fastener comprising: a base 60, which extends along the axial direction of the shaft; and a pair of engaging portions 61, which are provided at both ends of the base and have first surfaces 63 facing each other, the pair of engaging portions respectively comprising: a receiving hole 65, which is recessed from the first surface and has a bottom facing the end of the shaft; a groove 67, which extends from the receiving hole to the edge of the engaging portion and allows the end of the shaft to pass through; and a locking portion 77, which is provided in the groove and locks the shaft.

[0026] According to this aspect, in the hinge structure connecting the seat box and the seat of the straddle-type vehicle, workability during assembly can be improved.

[0027] Effects of the Invention

[0028] According to the above configuration, a fastener having excellent workability during assembly can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a side view of a straddle-type vehicle.

[0030] Figure 2 It is a three-dimensional diagram of a seat device.

[0031] Figure 3 This is a perspective view of the hinge structure connecting the seat box mounting portion and the bracket.

[0032] Figure 4 This is a side view of the hinge structure connecting the seat box mounting portion and the bracket.

[0033] Figure 5 It is a cross-sectional view of the hinge structure showing a state where a fastener is coupled to a shaft.

[0034] Figure 6It is a cross-sectional view showing the hinge structure before the fastener is coupled to the shaft.

[0035] Figure 7 It is a three-dimensional diagram of the fastener.

[0036] Figure 8 It is a diagram showing the engaging portion of the fastener.

[0037] Figure 9 It is a three-dimensional diagram of the hinge structure.

[0038] Figure 10 It is another three-dimensional diagram of the hinge structure.

[0039] Figure 11 It is a perspective view showing an engaging portion of a fastener according to a second embodiment.

[0040] Figure 12 It is a cross-sectional view showing an engaging portion of a fastener according to a second embodiment.

[0041] Figure 13 It is a perspective view showing an engaging portion of a fastener according to a third embodiment.

[0042] Figure 14 It is a cross-sectional view showing an engaging portion of a fastener according to a third embodiment.

[0043] Figure 15 It is a perspective view showing an engaging portion of a fastener according to a fourth embodiment.

[0044] Figure 16 It is a cross-sectional view showing an engaging portion of a fastener according to a fourth embodiment.

[0045] Figure 17 It is a perspective view showing an engaging portion of a fastener according to a fifth embodiment.

[0046] Figure 18 It is a cross-sectional view showing an engaging portion of a fastener according to a fifth embodiment.

[0047] Figure 19 It is a diagram showing an engaging portion of a fastener according to a sixth embodiment. DETAILED DESCRIPTION

[0048] Hereinafter, referring to the drawings, an embodiment of the present invention in which the fastener is applied to a hinge structure of a seat device for a straddle-type vehicle will be described.

[0049] like Figure 1 As shown, the straddle-type vehicle (vehicle 1 ) includes a vehicle frame 2 and a seat device 4 supported by the vehicle frame 2 .

[0050] The seat device 4 includes a seat box 5 serving as a storage box and a seat 6 on which an occupant sits.

[0051] like Figure 2 As shown, the seat box 5 includes a seat box body 7. The seat box body 7 is box-shaped, with an upper opening. The seat box body 7 extends forward and backward, with its length in the front-rear direction being longer than its length in the left-right direction. A seat box mounting portion 9, to which the seat 6 is attached, is provided at the center of the front portion of the seat box body 7 in the vehicle width direction.

[0052] like Figures 2 to 5 As shown, the seat box mounting portion 9 extends forward from the seat box main body 7. The seat box mounting portion 9 can be formed of a metal member. The seat box mounting portion 9 is formed with a first hinge hole 21 that passes through the seat box main body 7 in the left-right direction.

[0053] The seat 6 includes a seat body 31 and a bracket 33 .

[0054] The seat body 31 has a plate shape and is formed so as to be able to close the opening of the seat box body 7. A bracket 33 is coupled to the front end of the lower surface of the seat body 31.

[0055] The bracket 33 includes a pair of first members 35, a second member 36, and a third member 37 connecting the pair of first members 35 and the second member 36. The bracket 33 is formed of a metal plate-shaped member.

[0056] The pair of first members 35 are formed in a plate shape and each has a surface facing the left-right direction. The pair of first members 35 are each formed with a second hinge hole 44 that passes through the bracket 33 on the left and right sides.

[0057] The second member 36 is formed into a rectangular plate shape and connects the pair of first members 35 to each other on both sides. The second member 36 is attached to the front end portion of the lower surface of the seat body 31. Bolt holes 40 may be provided in the second member 36. The second member 36 can be fastened to the seat body 31 using bolts 46 inserted into the bolt holes 40.

[0058] The third member 37 is formed in a rectangular plate shape. The third member 37 connects the pair of first members 35 left and right. The third member 37 and the pair of first members 35 are connected at right angles.

[0059] When installing the bracket 33 on the seat box mounting portion 9, the operator positions the bracket 33 so that the pair of first members 35 are positioned outward in the left-right direction relative to the seat box mounting portion 9. At this point, the operator positions the bracket 33 so that the two second hinge holes 44 face the first hinge holes 21. This allows the first hinge holes 21 and the second hinge holes 44 to cooperate to form a through-hole that passes through the bracket 33 and the seat box mounting portion 9 in the left-right direction. A hinge structure 50 is provided between the bracket 33 and the seat box mounting portion 9.

[0060] like Figures 3 to 6 As shown, the hinge structure 50 rotatably connects the bracket 33 as a rotating body to the seat box mounting portion 9 as a base. The hinge structure 50 includes a shaft 53 and a fastener 55.

[0061] The shaft 53 is a cylindrical metal member. It is inserted into the first hinge hole 21 and the second hinge hole 44. Both ends of the shaft 53 protrude left and right from the pair of first members 35 of the bracket 33. Specifically, when inserted into the bracket 33 and the seat box mounting portion 9, the axial direction of the shaft 53 coincides with the left-right direction.

[0062] The fastener 55 is a structure formed of resin and includes a base 60 extending in a predetermined direction and a pair of engaging portions 61 provided at both ends of the base 60. Hereinafter, the fastener 55 will be described with the direction in which the base 60 extends being defined as the left-right direction.

[0063] like Figure 7 As shown, a pair of engaging portions 61 extend from each end of the base portion 60. Each engaging portion 61 has a first surface 63 that faces each other and a second surface 64 that faces in the opposite direction of the first surface 63. A receiving hole 65 and a groove 67 are provided on the first surface 63. The engaging portions 61 have a bilaterally symmetrical structure. Therefore, the following description will focus on one of the engaging portions 61.

[0064] like Figure 8 As shown, the receiving hole 65 is a bottomed hole recessed from the first surface 63. In this embodiment, the receiving hole 65 is formed in a circular shape when viewed from the left and right directions. The diameter of the receiving hole 65 is larger than the diameter of the shaft 53. The receiving hole 65 can be provided in the front end (i.e., the protruding end) of the engaging portion 61. The bottom 69 of the receiving hole 65 is connected to the first surface 63 on both sides by sidewalls 70 serving as the sides of the receiving hole 65.

[0065] The groove 67 is a groove recessed from the first surface 63. The groove 67 extends from the receiving hole 65 toward the edge 71 of the engaging portion 61. In this embodiment, the groove 67 is provided closer to the front end of the engaging portion 61 than the receiving hole 65 and extends in the direction in which the engaging portion 61 extends. In other embodiments, the groove 67 may extend at a different angle relative to the direction in which the engaging portion 61 extends.

[0066] A slit 73 is provided in the bottom 69 of the receiving hole 65 and the bottom portion 72 of the groove 67. Slit 73 extends horizontally through the bottom 69 and the groove 67. Slit 73 extends along the direction in which the groove 67 extends and reaches the edge 71 of the engaging portion 61. A weight reduction portion 75 is provided on the proximal side of the engaging portion 61, between the receiving hole 65 and the base 60.

[0067] The lightening portion 75 is a hole that passes through the engagement portion 61 in the left-right direction. The lightening portion 75 may be formed in a circular shape when viewed from the left-right direction. The slit 73 may extend from the edge 71 of the engagement portion 61 across the receiving hole 65 to the lightening portion 75 .

[0068] A locking portion 77 is provided in the groove 67. In this embodiment, the locking portion 77 is provided at the edge of the groove 67. The locking portion 77 protrudes from the groove 67 toward the side wall 70 of the receiving hole 65. The locking portion 77 can be formed of an elastic claw 79 that is elastically deformable. The locking portion 77 can have an inclined surface 78 that slopes from the edge 71 side of the engaging portion 61 toward the receiving hole 65.

[0069] Figure 9 and Figure 10 The hinge structure 50 is shown with the fastener 55 engaged with the shaft 53. The fastener 55 is engaged with both ends of the shaft 53. When the fastener 55 is engaged with the shaft 53, both ends of the shaft 53 are received in the receiving holes 65 of the fastener 55. Consequently, the bottom 69 of each receiving hole 65 faces the end of the shaft 53, restricting axial movement of the shaft 53. Furthermore, the two ends of the shaft 53 are locked within the receiving holes 65 by the locking portions 77. This ensures that the fastener 55 remains engaged with the shaft 53 without falling off.

[0070] Next, refer to Figure 5 and Figure 6 Next, a method of rotatably connecting the seat 6 to the seat box 5 via the hinge structure 50 of this embodiment will be described.

[0071] As a first step, the operator places the bracket 33 on the seat box mounting portion 9. At this time, the operator places the seat box mounting portion 9 and the bracket 33 so that the first hinge hole 21 and the second hinge hole 44 face each other.

[0072] As a second step, the operator inserts the shaft 53 into the first hinge hole 21 and the second hinge hole 44. At this time, the operator inserts the shaft 53 so that both ends protrude from the seat box mounting portion 9 and the bracket 33.

[0073] As a third step, the operator places the fastener 55 on the shaft 53 in a predetermined direction. At this time, the operator places the fastener 55 so that the direction in which the base 60 extends coincides with the axial direction of the shaft 53 (the left-right direction in this embodiment) and the tip portions of the pair of engaging portions 61 face the shaft 53 side. Figure 6 ).

[0074] As a fourth step, the operator then couples the fastener 55 to the shaft 53. At this time, the operator can hold the base 60 and press the fastener 55 into the shaft 53 while the extended end portions of the engaging portion 61 abut against both ends of the shaft 53.

[0075] At this time, the engaging portion 61 is elastically deformed by the force transmitted through the ends of the shaft 53, and expands in a direction perpendicular to the direction in which the fastener 55 is pressed in and away from the shaft 53. As a result, the ends of the shaft 53 pass through the groove 67 while sliding on the inclined surface 78 of the locking portion 77, and are accommodated in the accommodation hole 65.

[0076] When both ends of the shaft 53 are accommodated in the accommodation hole 65 and the operator removes the force applied to the fastener 55, the engaging portion 61 recovers from the deformed state. Figure 5 ).

[0077] Thus, the seat box mounting portion 9 and the bracket 33 can be rotatably connected via the hinge structure 50 .

[0078] Next, the effects of the fastener 55 of this embodiment will be described. When an operator presses the fastener 55 against the shaft 53 from a predetermined direction, both ends of the shaft 53 are accommodated in the accommodation holes 65. The ends of the shaft 53 are restricted from axial movement by the bottom 69 and locked by the locking portions 77, preventing the shaft 53 from falling out of the seat box mounting portion 9 and the bracket 33. Thus, the fastener 55 can attach the shaft 53 to the seat box mounting portion 9 and the bracket 33. Consequently, a fastener 55 with excellent workability during assembly can be provided.

[0079] Furthermore, a slit 73 is provided in the bottom portion 69 and the bottom portion 72 of the groove 67. The slit 73 extends axially through the bottom portion 69 and along the direction in which the groove 67 extends, reaching the edge 71 of the engaging portion 61. With this structure, when the fastener 55 is press-fitted onto the shaft 53, the engaging portion 61 is elastically deformed by the slit 73. This facilitates the passage of the shaft 53 through the groove 67. This allows the fastener 55 to be coupled to the shaft 53 with improved operability.

[0080] Furthermore, a weight-reducing portion 75 is provided axially extending between the receiving hole 65 of the engaging portion 61 and the base 60. The slit 73 extends across the receiving hole 65 to reach the weight-reducing portion 75. This structure further facilitates elastic deformation of the engaging portion 61 when the fastener 55 is press-fitted onto the shaft 53. This allows for even greater operability in coupling the fastener 55 to the shaft 53.

[0081] Furthermore, the receiving hole 65 is formed in a circular shape when viewed from the axial direction. This allows the shaft 53 to easily rotate within the receiving hole 65. Consequently, the bracket 33 can easily rotate relative to the seat box mounting portion 9.

[0082] The locking portion 77 is an elastic claw 79 that projects into the groove 67. With this structure, the elastic claw 79 elastically deforms when the fastener 55 is coupled to the shaft 53 or when the fastener 55 is removed from the shaft 53. This facilitates the shaft 53 to pass through the groove 67.

[0083] Furthermore, the locking portion 77 includes an inclined surface 78 that slopes from the edge 71 side of the engaging portion 61 toward the receiving hole 65. With this structure, when the fastener 55 is press-fitted onto the shaft 53, the shaft 53 is inserted into the receiving hole 65 along the inclined surface 78. This reduces resistance during insertion of the shaft 53. Consequently, the fastener 55 and the shaft 53 can be coupled together with improved operability.

[0084] Furthermore, a hinge structure 50 including a fastener 55 of this embodiment pivotally connects a seat box 5 mounted on a vehicle 1 and a seat 6 that opens and closes the seat box 5. The hinge structure 50 includes a shaft 53 inserted through a seat box mounting portion 9 of the seat box 5 and a bracket 33 of the seat 6 with both ends protruding, and fasteners 55 coupled to both ends of the shaft 53.

[0085] According to this configuration, in the hinge structure 50 connecting the seat box 5 and the seat 6 of the vehicle 1 , workability during assembly can be improved.

[0086] Next, a hinge structure 50 according to a second embodiment will be described. The fastener 55 according to the second embodiment differs from the hinge structure 50 according to the first embodiment in the shape of the engagement portion 61. The other configurations are denoted by the same reference numerals as those in the first embodiment, and their descriptions are omitted.

[0087] like Figure 11 and Figure 12 As shown, the receiving hole 65 of the hinge structure 50 of the second embodiment is formed in a rectangular shape when viewed from the axial direction of the shaft 53. The groove portion 67 is formed in a rectangular shape when viewed from the axial direction of the shaft 53 and is connected to the receiving hole 65.

[0088] The locking portion 77 is composed of an elastic claw 79. The elastic claw 79 is provided on the bottom portion 72. In this embodiment, the elastic claw 79 has an inclined surface 78 that protrudes from the edge portion 71 side of the locking portion 61 toward the receiving hole 65 into the groove portion 67; and a non-return surface 80 facing the receiving hole 65 side. The locking portion 61 does not have the slit 73 and the weight reduction portion 75 (see Figure 8 ).

[0089] According to this structure, when the fastener 55 is pressed relative to the shaft 53, the shaft 53 is inserted into the groove portion 67 along the inclined surface 78. Therefore, the fastener 55 can be combined with the shaft 53 with good workability. In addition, when the shaft 53 is accommodated in the accommodation hole 65, the shaft 53 is reliably retained in the accommodation hole 65 by the non-return surface 80. Therefore, it is possible to reliably restrict the fastener 55 from falling off from the shaft 53. Moreover, since the engaging portion 61 does not have the slit 73 and the weight-reducing portion 75 (see Figure 8 ), thus the rigidity of the engaging portion 61 can be improved.

[0090] Next, a hinge structure 50 according to a third embodiment will be described. The hinge structure 50 according to the third embodiment differs from the hinge structure 50 according to the second embodiment in that two slits 73 are provided.

[0091] like Figure 13 and Figure 14 As shown, two slits 73 are formed in the bottom 69 of the receiving hole 65 and the bottom portion 72 of the groove portion 67 of the hinge structure 50 of the third embodiment. The two slits 73 extend from the base 60 side of the engaging portion 61 of the receiving hole 65 to the edge 71 of the engaging portion 61. The formation of the two slits 73 divides the bottom 69 and the side wall 70 in the extending direction of the groove portion 67.

[0092] According to this structure, since the bottom portion 69 and the side wall 70 are divided, the bottom portion 69 is easily deformed when the shaft 53 is accommodated in the accommodation hole 65. Therefore, the fastener 55 and the shaft 53 can be coupled together with good workability.

[0093] Next, a hinge structure 50 according to a fourth embodiment will be described. The hinge structure 50 according to the fourth embodiment differs from the hinge structure 50 according to the third embodiment in the shapes of the two slits 73 and in the provision of a second slit 101 .

[0094] like Figure 15 and Figure 16 As shown, the two slits 73 of the hinge structure 50 of the fourth embodiment are formed in the bottom portion 72. The two slits 73 extend respectively from the bottom portion 72 toward the front end side of the locking portion 61. The ends of the two slits 73 on the side of the base 60 are connected by a second slit 101. The second slit 101 extends in a direction orthogonal to the two slits 73 and penetrates the locking portion 61 in the axial direction of the shaft 53. As a result, the two slits 73 and the second slit 101 are formed in a U shape when viewed from the axial direction of the shaft 53. The portion of the bottom portion 72 where the locking portion 77 is formed (hereinafter referred to as the thin-walled portion 111) is thinner in the axial direction than the portion where the locking portion 77 is not formed.

[0095] According to this structure, since the bottom portion 72 has the thin-walled portion 111, the engaging portion 61 is easily bent when the shaft 53 enters the receiving hole 65. Therefore, the fastener 55 and the shaft 53 can be coupled together with good workability.

[0096] Next, a hinge structure 50 according to a fifth embodiment will be described. The hinge structure 50 according to the fifth embodiment differs from the hinge structure 50 according to the second embodiment in the shape of the locking portion 77 .

[0097] like Figure 17 and Figure 18As shown, the locking portion 77 of the hinge structure 50 of the fifth embodiment is configured to be M-shaped when viewed from the axial direction of the shaft 53. The locking portion 77 is a pair of elastic claws 79 that project from the edge of the groove 67 in an opposing manner. The pair of elastic claws 79 each have an inclined surface 78 that projects from the edge 71 of the engaging portion 61 toward the receiving hole 65 and into the groove 67, and a non-return surface 80 that faces the receiving hole 65.

[0098] According to this structure, the shaft 53 can be locked in the accommodation hole 65 from two directions by the locking portion 77. Therefore, it is possible to reliably suppress the shaft 53 from falling out.

[0099] Next, a hinge structure 50 according to a sixth embodiment will be described. The hinge structure 50 according to the sixth embodiment differs from the hinge structure 50 according to the first embodiment in that it does not include a lightening portion 75 and in the direction in which the groove portion 67 extends.

[0100] like Figure 19 As shown, the groove portion 67 is provided at a portion closer to the front end side of the engagement portion 61 than the accommodation hole 65 , and extends in a direction perpendicular to the direction in which the engagement portion 61 extends.

[0101] According to this structure, the direction in which the fastener 55 is press-fitted in order to couple the fastener 55 to the shaft 53 can be changed.

[0102] The above is the end of the description of the specific embodiment, but the present invention is not limited to the above embodiment and can be widely modified. The hinge structure 50 can also be used for example in a center console box of the vehicle 1.

[0103] Explanation of symbols

[0104] 1—Vehicle (straddle-type vehicle), 5—Seat box, 6—Seat, 9—Seat mounting portion (base), 33—Bracket (rotating body), 53—Axle, 55—Fastener, 60—Base, 61—Engaging portion, 63—First surface, 65—Accommodating hole, 67—Groove portion, 69—Bottom, 71—Edge portion, 72—Bottom portion, 73—Slit, 75—Weight reduction portion, 77—Locking portion, 78—Inclined surface, 79—Elastic claw, 80—Non-return surface.

Claims

1. A fastener that is coupled to both ends of a shaft inserted into a base and a rotating body with both ends protruding. The fastener is characterized by having: a base extending in the axial direction of the shaft; and A pair of engaging portions, which are provided at both ends of the base and have first surfaces facing each other, The pair of engaging parts respectively include: a receiving hole recessed from the first surface and having a bottom facing the end of the shaft; a groove portion extending from the receiving hole toward an edge of the engaging portion and allowing an end portion of the shaft to pass therethrough; and The locking portion is provided in the groove portion and locks the shaft.

2. The fastener according to claim 1, wherein: A slit is provided in the bottom portion and the bottom portion of the groove portion. The slit penetrates in the axial direction, extends in the extending direction of the groove portion, and reaches the edge portion of the engaging portion.

3. The fastener according to claim 2, wherein: A weight-reducing portion is provided between the receiving hole of the engaging portion and the base portion and extends through the engaging portion in the axial direction. The slit crosses the accommodation hole and reaches the weight reduction portion.

4. The fastener according to claim 1, wherein: The accommodation hole is formed in a circular shape when viewed from the axial direction.

5. The fastener according to claim 1, wherein: The locking portion is an elastic claw protruding into the groove.

6. The fastener according to claim 5, wherein: The elastic claw includes: an inclined surface protruding from the edge portion side of the engaging portion toward the receiving hole into the groove portion; and a non-return surface facing the receiving hole side.

7. A hinge structure that rotatably connects a seat box mounted on a straddle-type vehicle and a seat for opening and closing the seat box. The hinge structure is characterized by having: a shaft inserted through the seat box and the seat with both ends protruding; and Fasteners, which are combined with both ends of the above shaft, The above fastener has: a base extending along the axial direction of the shaft; and A pair of engaging portions, which are provided at both ends of the base and have first surfaces facing each other, The pair of engaging parts respectively include: a receiving hole recessed from the first surface and having a bottom facing the end of the shaft; a groove portion extending from the receiving hole toward an edge of the engaging portion and allowing an end portion of the shaft to pass therethrough; and The locking portion is provided in the groove portion and locks the shaft.

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