TWI856995B - Bicycle rims - Google Patents

Abstract

[Topic] A bicycle rim (1) that can easily mount a tire (200). [Solution] A tire (200) is mounted on a bicycle rim (1). The bicycle rim (1) comprises: a first annular side portion (3), a second annular side portion (5), and an annular connecting portion (7). The annular connecting portion (7) is used to connect the first annular side portion (3) and the second annular side portion (5). The annular connecting portion (7) includes an elastic member (23). A recess (19) is formed on a radially outer portion (17) of the annular connecting portion (7), and the recess (19) has an edge portion (19a) and a bottom surface (19b). The minimum radial distance (D) defined by the edge (19a) and the bottom surface (19b) in the radial direction is greater than 2.0 mm.

Description

Bicycle rims

The present invention relates to a bicycle rim.

Patent document 1 discloses a bicycle rim. The bicycle rim is connected to a hub via a plurality of spokes. A hole for inserting a pipe joint is provided in a known bicycle rim. The hole is covered by a tape. In this state, a tubeless tire is mounted on the bicycle rim.

[Prior Art Literature] [Patent Literature]

[Patent document 1] EP2583835A1

Usually, a groove is provided in the center of the rim corresponding to the tubeless tire. When the tubeless tire is mounted on the rim, the tire bead is placed in the groove. By placing the tire bead in the groove, a margin is generated in the circumferential direction of the tire, making it easier to mount the tire. However, if the groove is deep, when air enters the tire, it is difficult for the tire bead to be supported on the bead seat surface.

The purpose of the present invention is to provide a bicycle rim that can easily mount a tire.

In the first form of the present invention, a tire is mounted on a bicycle rim. The bicycle rim has a first annular side surface, a second annular side surface, and an annular connecting portion. The annular connecting portion connects the first annular side surface and the second annular side surface in the axial direction of the rotation center axis of the bicycle rim. The annular connecting portion includes an elastic member.

In the radial direction of the rotation center axis, the radial outer surface of the annular connection portion is defined. In the radial outer surface of the annular connection portion, there is formed: a concave portion extending in the circumferential direction of the rotation center axis and having an edge and a bottom surface. The minimum radial distance defined by the edge and the bottom surface in the radial direction is greater than 2.0 mm.

In the first type of bicycle rim, since the annular connection portion includes an elastic member, it is easy to mount the tire on the bicycle rim. In the present bicycle rim, since the minimum radial distance is more than 2.0 mm, the tire can be easily mounted on the bicycle rim.

The second type of the present invention is a bicycle rim of the first type, wherein the radial distance is less than 4.0 mm.

In the second type of bicycle rim, by setting the radial distance to 4.0 mm or less, the tire can be easily mounted on the bicycle rim.

The third form of the present invention is a bicycle rim of the first or second form, wherein the bottom surface of the recess is located on the radially outer side of the elastic member.

In the third type of bicycle rim, by positioning the bottom surface of the recessed portion on the radially outer side of the elastic member, the tire can be easily mounted on the bicycle rim.

The fourth form of the present invention is a bicycle rim of any one of the first to third forms, wherein the structure is as follows. The annular connecting portion includes a connecting base, and the connecting base is used to connect the first annular side surface portion and the second annular side surface portion. The elastic member is arranged on the radially outer side of the connecting base.

In the fourth type of bicycle rim, by arranging the elastic member on the radially outer side of the connecting base, the tire can be easily mounted on the bicycle rim.

The fifth form of the present invention is the bicycle rim of the fourth form, wherein the annular connection portion further includes: a sealing member radially arranged between the connection base and the elastic member.

The fifth type of bicycle rim further has a sealing member, so that the hole through which the pipe joint is inserted can be properly sealed.

The sixth form of the present invention is a bicycle rim according to the fifth form, wherein the annular connecting portion has a mounting portion on the outer side of the axis of the rotation center axis of a pair of edge portions. The sealing member extends to the mounting portion.

In the sixth type of bicycle rim, the sealing member extends to the mounting portion, so the hole through which the pipe joint is inserted can be more appropriately sealed.

The seventh form of the present invention is a bicycle rim of any one of the first to fourth forms, wherein the annular connection portion further comprises: a sealing member radially arranged further outside the elastic member.

In the seventh type of bicycle rim, since the sealing member is arranged radially outwardly relative to the elastic member, the hole through which the pipe joint is inserted can be more appropriately sealed by the sealing member via the elastic member.

The eighth form of the present invention is a bicycle rim according to the seventh form, wherein the annular connecting portion has a mounting portion on the outer side of the axis of the rotation center axis of a pair of edge portions. The sealing member extends to the mounting portion.

In the 8th type bicycle rim, the sealing member extends to the mounting portion, so the hole through which the pipe joint is inserted can be more appropriately sealed.

In the ninth embodiment of the present invention, a tire is mounted on a bicycle rim. The bicycle rim has a first annular side surface, a second annular side surface, and an annular connecting portion. The annular connecting portion connects the first annular side surface and the second annular side surface in the axial direction of the rotation center axis of the bicycle rim. The annular connecting portion includes an elastic member.

In the radial direction of the rotation center axis, the radial outer part of the annular connection part is defined. In the radial outer part of the annular connection part, there is formed: a concave part extending in the circumferential direction of the rotation center axis and having an edge and a bottom. The radial distance defined by the edge and the bottom in the radial direction is greater than 2.0 mm.

In the 9th type of bicycle rim, since the annular connection portion includes an elastic member, it is easy to mount the tire on the bicycle rim. In this bicycle rim, since the radial distance is more than 2.0 mm, the tire can be easily mounted on the bicycle rim.

The tenth form of the present invention is a bicycle rim in the ninth form, wherein the structure is as follows. The bottom is the portion closest to the rotation center axis in the area where the elastic member is arranged in the recess.

The 10th type of bicycle rim defines a radial distance between the edge and the bottom. This structure makes it easier to attach the tire to the bicycle rim.

The 11th form of the present invention is a bicycle rim of the 9th or 10th form, wherein the radial distance is less than 4.0 mm.

In the 11th type bicycle rim, by setting the radial distance to 4.0 mm or less, the tire can be easily mounted on the bicycle rim.

The twelfth form of the present invention is a bicycle rim of any one of the ninth to eleventh forms, wherein the bottom is located on the radially outer side of the elastic member.

In the twelfth type of bicycle rim, the tire can be easily mounted on the bicycle rim by positioning the bottom portion on the radially outer side of the elastic member.

The 13th form of the present invention is a bicycle rim of any one of the 9th to 12th forms, wherein the structure is as follows. The annular connecting portion includes a connecting base, and the connecting base is used to connect the first annular side surface portion and the second annular side surface portion. The elastic member is arranged on the radial outer side of the connecting base.

In the 13th type of bicycle rim, by arranging the elastic member on the radially outer side of the connecting base, the tire can be easily mounted on the bicycle rim.

The 14th form of the present invention is the bicycle rim of the 13th form, wherein the annular connection portion further includes: a sealing member radially arranged between the connection base and the elastic member.

The 14th type of bicycle rim further has a sealing member, so that the hole through which the pipe joint is inserted can be properly sealed.

The 15th form of the present invention is a bicycle rim according to the 14th form, wherein the annular connecting portion has a mounting portion on the outer side of the axis of the rotation center axis of a pair of edge portions. The sealing member extends to the mounting portion.

In the 15th type bicycle rim, the sealing member extends to the mounting portion, so the hole through which the pipe joint is inserted can be more appropriately sealed.

The 16th form of the present invention is a bicycle rim according to any one of the 9th to 13th forms, wherein the annular connection portion further comprises: a sealing member arranged radially on the outer side of the elastic member.

In the 16th type bicycle rim, since the sealing member is arranged radially outward from the elastic member, the hole through which the pipe joint is inserted can be more appropriately sealed by the sealing member via the elastic member.

The 17th form of the present invention is a bicycle rim according to the 16th form, wherein the annular connecting portion has a mounting portion on the outer side of the axis of the rotation center axis of a pair of edge portions. The sealing member extends to the mounting portion.

In the 17th type bicycle rim, the sealing member extends to the mounting portion, so the hole through which the pipe joint is inserted can be more appropriately sealed.

In the 18th form of the present invention, a tire is mounted on a bicycle rim. The bicycle rim has a first annular side surface, a second annular side surface, and an annular connecting portion. The annular connecting portion connects the first annular side surface and the second annular side surface in the axial direction of the rotation center axis of the bicycle rim. The annular connecting portion includes an elastic member and a sealing member. The sealing member is arranged on the outer side of the elastic member in the radial direction of the rotation center axis of the bicycle rim.

In the 18th type bicycle rim, since the annular connection portion includes an elastic member, it is easy to mount the tire on the bicycle rim. Since the sealing member is arranged radially outward from the elastic member, the hole through which the pipe joint is inserted can be more appropriately sealed by the sealing member via the elastic member.

The 19th form of the present invention is a bicycle rim in the 18th form, wherein the structure is as follows. In the radial direction, the radial outer portion of the annular connecting portion is defined. In the radial outer portion, there is formed: a recess extending in the circumferential direction toward the rotation center axis.

In the 19th type of bicycle rim, since the recessed portion extends in the circumferential direction on the radially outer side, the sealing member and the elastic member can be easily arranged in the circumferential direction.

The 20th form of the present invention is a bicycle rim of the 18th or 19th form, wherein the structure is as follows. The annular connecting portion includes a connecting base, and the connecting base is used to connect the first annular side surface portion and the second annular side surface portion. The elastic member is radially arranged on the outer side of the connecting base.

In the bicycle rim of the 20th type, the tire can be easily mounted on the bicycle rim by arranging the elastic member radially outward from the connection base.

In the 21st form of the present invention, a tire is mounted on a bicycle rim. The bicycle rim has a first annular side surface, a second annular side surface, and an annular connecting portion. The annular connecting portion connects the first annular side surface and the second annular side surface in the axial direction of the rotation center axis of the bicycle rim. The annular connecting portion includes an elastic member.

The radial outer surface of the annular connection portion is defined in the radial direction of the rotation center axis. The elastic member has a non-uniform radial thickness in the radial direction. The elastic member has a recess extending in the circumferential direction of the rotation center axis on the radial outer surface of the annular connection portion and on the radial outer surface of the elastic member.

In the 21st type of bicycle rim, the annular connection portion includes an elastic member. The elastic member has a recess extending in the circumferential direction on the radial outer portion. This makes it easier to mount the tire on the bicycle rim.

The 22nd form of the present invention is the bicycle rim of the 21st form, wherein the annular connection portion further includes: a sealing member radially arranged on at least one of the outer side of the elastic member and the inner side of the elastic member.

In the bicycle rim of the 22nd type, since the sealing member is arranged on the outer side of the elastic member and/or the inner side of the elastic member, the hole through which the pipe joint is inserted can be more appropriately sealed.

The 23rd form of the present invention is a bicycle rim of any one of the 5th to 8th forms, the 14th to 20th forms, and the 22nd form, wherein the sealing member is a tape member having an adhesive surface.

In the 23rd type bicycle rim, the sealing member is a tape member having an adhesive surface, so it is easy to install the sealing member on the target member.

The 24th form of the present invention is a bicycle rim of any one of the 5th to 8th forms, the 14th to 20th forms, and the 22nd form, wherein the sealing member is an annular rubber band member.

In the 24th type of bicycle rim, the sealing member is a ring-shaped rubber band member, so it is easy to install the sealing member on the target member.

The 25th form of the present invention is a bicycle rim of any one of the 5th to 8th forms, the 14th to 20th forms, and the 22nd to 24th forms, wherein the elastic member allows air to pass through.

In the 25th type bicycle rim, since the elastic member allows air to pass through, the elastic member can be made lighter.

The 26th form of the present invention is a bicycle rim of any one of the 1st to 24th forms, wherein the elastic member cannot allow air to penetrate.

In the 26th type of bicycle rim, since the elastic member cannot allow air to penetrate, the elastic member can prevent tire deflation.

The 27th form of the present invention is a bicycle rim of any one of the 1st to 26th forms, wherein the elastic member is ring-shaped.

In the 27th type bicycle rim, the elastic member is ring-shaped, so it is easy to arrange the elastic member on the target member.

The 28th form of the present invention is a bicycle rim of any one of the 1st to 27th forms, wherein the recess is annular.

In the 28th type bicycle rim, since the recessed portion is ring-shaped, it is easy to install the tire.

The 29th form of the present invention is a bicycle rim of any one of the 1st to 28th forms, wherein at least one of the first annular side surface, the second annular side surface, and the annular connecting portion comprises a non-metallic material.

In the 29th type of bicycle rim, since at least one of the first annular side surface portion, the second annular side surface portion, and the annular connecting portion includes a non-metal material, the bicycle rim can be made lighter.

In the 30th form of the present invention, in the 29th form of the bicycle rim, the non-metallic material is a fiber composite material.

In the 30th type of bicycle rim, since the non-metallic material is a fiber composite material, the bicycle rim can be made lighter.

The 31st form of the present invention is a bicycle rim of any one of the 1st to 28th forms, wherein at least one of the first annular side surface, the second annular side surface, and the annular connecting portion contains a metal material.

In the bicycle rim of the 31st embodiment, since at least one of the first annular side surface portion, the second annular side surface portion, and the annular connecting portion includes a metal material, the rigidity of the bicycle rim can be appropriately ensured.

The 32nd form of the present invention is a bicycle rim in the 31st form, wherein the metal material is aluminum.

In the 32nd type bicycle rim, since the metal material is aluminum, it is possible to simultaneously achieve the goal of ensuring the rigidity of the bicycle rim and reducing the weight of the bicycle rim.

The 33rd form of the present invention is a bicycle rim of any one of the 1st to 32nd forms, wherein the structure is as follows. The first annular side surface and the second annular side surface each have a retaining portion for retaining a tire and provided along the outer periphery.

The bicycle rim of the 33rd type can properly hold the tire by the holding parts of the first annular side surface and the second annular side surface.

The 34th form of the present invention is a bicycle rim in the 33rd form, wherein the structure is as follows. The retaining portion includes: a first retaining portion arranged radially outwardly of the first annular side surface portion, and a second retaining portion arranged radially outwardly of the second annular side surface portion.

The 34th type of bicycle rim can properly hold the tire by means of the first holding portion and the second holding portion.

The 35th form of the present invention, in the 34th form of the bicycle rim, is constructed as follows. The first retaining portion includes: a first retaining surface extending radially outwardly of the first annular side surface portion. The second retaining portion includes: a second retaining surface extending radially outwardly of the second annular side surface portion.

The bicycle rim of the 35th type can properly hold the tire by the first holding surface of the first holding portion and the second holding surface of the second holding portion.

The 36th form of the present invention is a bicycle rim of the 34th or 35th form, wherein the structure is as follows. The first retaining portion includes: a first locking portion arranged on the radially outer side of the first annular side surface portion. The second retaining portion includes: a second locking portion arranged on the radially outer side of the second annular side surface portion.

The bicycle rim of the 36th type can properly hold the tire by the first locking portion of the first holding portion and the second locking portion of the second holding portion.

The bicycle rim of the present invention can easily install tires.

1: Bicycle rims

3: 1st annular lateral face

5: Second annular lateral face

7: Ring connection part

9: Maintaining part

13: First holding part

13a: 1st locking part

13b: 1st holding surface

15: Second holding unit

15a: Second stopper

15b: Second holding surface

17: The radial outer part of the annular connection part

19: Concave part

19a: Margin

19b: Bottom

19c: Installation Department

19d: Bottom surface

19e: Side

21: Connect the base

21a: Hole

23: Elastic components

25: The radial outer part of the connection base

27: The radial outer part of the elastic member

31,131: Sealing components

100:Wheels

101: Spindle

102: wheel hub

105a: Part 1

105b: Part 2

200: Tires

C1: Rotation center axis

D,D1,D2,D3: radial distance

[Figure 1] Figure 1 is a front view of a bicycle wheel according to the first embodiment.

[Figure 2] Figure 2 is a cross-sectional view of the bicycle rim of the first embodiment (cut line II-II in Figure 1).

[Figure 3] Figure 3 is a partially enlarged cross-sectional view of the bicycle rim of the first embodiment.

[Figure 4] Figure 4 is a cross-sectional view of the bicycle rim of the second to fourth embodiments (cut line IV-IV in Figure 3).

[Figure 5A] Figure 5A is a partially enlarged cross-sectional view of the bicycle rim of the second embodiment.

[Figure 5B] Figure 5B is a partially enlarged cross-sectional view of a bicycle rim of a modified example of the second embodiment.

[Figure 6A] Figure 6A is a partially enlarged cross-sectional view of the bicycle rim of the third embodiment.

[Figure 6B] Figure 6B is a partially enlarged cross-sectional view of a bicycle rim of a modified example of the third embodiment.

[Figure 7A] Figure 7A is a partially enlarged cross-sectional view of the bicycle rim of the fourth embodiment.

[Figure 7B] Figure 7B is a partially enlarged cross-sectional view of a bicycle rim of a modified example of the fourth embodiment.

<First implementation method>

The structure of the bicycle rim 1 of this embodiment is described with reference to the drawings. As shown in FIG. 1, the bicycle rim 1 is connected to the hub 102 via a plurality of spokes 101. The bicycle rim 1 has a rotation center axis C1. The bicycle rim 1 extends in the circumferential direction of the rotation center axis C1. For example, the bicycle rim 1 is formed in a ring shape. A tire 200 is mounted on the bicycle rim 1. The bicycle wheel 100 has: a bicycle rim 1, a plurality of spokes 101, and a hub 102.

As shown in FIG. 2, the bicycle rim 1 has: a first annular side portion 3, a second annular side portion 5, and an annular connecting portion 7. At least one of the first annular side portion 3, the second annular side portion 5, and the annular connecting portion 7 includes a non-metal material. The non-metal material is, for example, a fiber composite material. The fiber composite material is, for example, a combination of a base material, that is, a resin, and a fiber. The fiber composite material is characterized by being lightweight and having high strength. In this embodiment, the first annular side portion 3, the second annular side portion 5, and the annular connecting portion 7 are respectively composed of non-metal materials.

At least one of the first annular side surface 3, the second annular side surface 5, and the annular connecting portion 7 may include a metal material. The metal material is, for example, aluminum. The first annular side surface 3, the second annular side surface 5, and the annular connecting portion 7 may each be made of a metal material. The first annular side surface 3, the second annular side surface 5, and the annular connecting portion 7 may each be made of a metal material or a non-metal material.

As shown in FIG. 1, the first annular side surface portion 3 extends in the circumferential direction of the rotation center axis C1. For example, the first annular side surface portion 3 is formed in an annular shape. The second annular side surface portion 5 extends in the circumferential direction of the rotation center axis C1. For example, the second annular side surface portion 5 is formed in an annular shape. The second annular side surface portion 5 is arranged to be opposite to the first annular side surface portion 3 in the axial direction of the rotation center axis C1. The radially inner portion of the second annular side surface portion 5 with respect to the rotation center axis C1 is connected to the radially inner portion of the first annular side surface portion 3 with respect to the rotation center axis C1. The spoke 101 is mounted on the portion where the first annular side surface portion 3 and the second annular side surface portion 5 are connected. In the following, the radial direction indicates the radial direction of the rotation center axis C1. The circumferential direction indicates the circumferential direction of the rotation center axis C1.

As shown in Figures 1 and 2, the first annular side portion 3 and the second annular side portion 5 each have a retaining portion 9. The retaining portion 9 is used to retain the tire 200. The retaining portion 9 is provided along the outer periphery of the first annular side portion 3 and the second annular side portion 5. The first annular side portion 3 and the second annular side portion 5 each have a retaining portion 9 provided along the outer periphery for retaining the tire 200. The retaining portion 9 is used to retain the radially inner portion of the tire 200. The retaining portion 9 includes a first retaining portion 13 and a second retaining portion 15. The first retaining portion 13 is disposed on the radially outer side of the first annular side portion 3. The second retaining portion 15 is disposed on the radially outer side of the second annular side portion 5. The holding portion 9 includes: a first holding portion 13 arranged radially outward of the first annular side surface portion 3, and a second holding portion 15 arranged radially outward of the second annular side surface portion 5.

As shown in Figures 2 and 3, the first retaining portion 13 is disposed on the radially outer portion of the first annular side portion 3. As shown in Figure 3, the first retaining portion 13 includes a first locking portion 13a. The first locking portion 13a is disposed on the radially outer side of the first retaining portion 13. The first locking portion 13a is disposed on the radially outer side of the first retaining surface 13b. The first locking portion 13a is disposed on the radially outer side of the first annular side portion 3. The first retaining portion 13 includes: the first locking portion 13a disposed on the radially outer side of the first annular side portion 3. The first locking portion 13a is used to lock the first portion 105a of the tire 200. The first portion 105a is located on the radially inner side of the tire 200. The first portion 105a is also called a tire bead portion. The first stopper portion 13a extends in the circumferential direction of the rotation center axis C1. The first stopper portion 13a protrudes toward the second retaining portion 15. The first stopper portion 13a protrudes parallel to the rotation center axis C1.

As shown in Figures 2 and 3, the second retaining portion 15 is arranged on the radially outer side of the second annular side portion 5. As shown in Figure 3, the second retaining portion 15 includes a second locking portion 15a. The second locking portion 15a is arranged on the radially outer side of the second retaining portion 15. The second locking portion 15a is arranged on the radially outer side of the second retaining surface 15b. The second locking portion 15a is arranged on the radially outer side of the second annular side portion 5. The second retaining portion 15 includes: the second locking portion 15a arranged on the radially outer side of the second annular side portion 5. The second locking portion 15a is used to lock the second portion 105b of the tire 200. The second portion 105b is located on the radially inner side of the tire 200. The second portion 105b is also called a tire bead portion. The second stopper 15a extends in the circumferential direction of the rotation center axis C1. The second stopper 15a protrudes toward the first retaining portion 13. The second stopper 15a protrudes parallel to the rotation center axis C1.

The second stopper 15a is arranged to be opposite to the first stopper 13a in the axial direction of the rotation center axis C1. That is, the radially inner portion of the tire 200 is stopped by the first stopper 13a and the second stopper 15a. For example, the first stopper 13a stops the first portion 105a. The second stopper 15a stops the second portion 105b.

As shown in FIG. 2, the annular connecting portion 7 connects the first annular side surface portion 3 and the second annular side surface portion 5 in the axial direction of the rotation center axis C1 of the bicycle rim 1. In the radial direction of the rotation center axis C1, a radial outer surface portion 17 of the annular connecting portion 7 is defined. In the radial outer surface portion 17 of the annular connecting portion 7, a recessed portion 19 extending in the circumferential direction of the rotation center axis C1 and having an edge 19a and a bottom 19b is formed. The recessed portion 19 is formed in the radial outer surface portion 17 of the annular connecting portion 7. The recessed portion 19 has an edge 19a and a bottom 19b. In the first embodiment, the recessed portion 19 has a bottom surface 19d and a side surface 19e. The recess 19 extends in the circumferential direction of the rotation center axis C1. Specifically, the recess 19 is annular. The recess 19 may also be formed partially in the circumferential direction of the rotation center axis C1.

As shown in FIG. 3, the recess 19 has: a pair of edges 19a and a bottom 19b. The edge 19a is the end of the recess 19 in the circumferential direction of the rotation center axis C1. The pair of edges 19a are arranged on opposite sides relative to the bottom 19b in the axial direction of the rotation center axis C1. The pair of edges 19a are provided on the radial outer portion 17 of the annular connecting portion 7. In the first embodiment, the pair of edges 19a are provided, for example, on the radial outer portion 25 of the connecting base 21 described later. The radial outer portion 17 of the annular connecting portion 7 includes the radial outer portion 25 of the connecting base 21 described later.

The bottom 19b is provided between a pair of edge portions 19a in the axial direction of the rotation center axis C1. The bottom 19b is the portion of the radial outer portion 17 of the recess 19 closest to the rotation center axis C1. The bottom 19b is the portion of the region R in which the elastic member 23 is arranged in the recess 19 closest to the rotation center axis C1. The bottom 19b is the portion of the region R in which the elastic member 23 is arranged in the recess 19 closest to the rotation center axis C1. The region R represents the range between the two ends of the elastic member 23 in the axial direction of the rotation center axis C1.

The radial position of the bottom 19b is on the radially outermost surface of the region R of the recess 19 where the elastic member 23 is arranged. The bottom 19b is provided on the radial outer portion 17 of the annular connecting portion 7. For example, the radial outer portion 17 of the annular connecting portion 7 includes the radial outer portion 27 of the elastic member 23 described later. The bottom 19b here is defined as the central portion of the radial outer portion 27 of the elastic member 23, for example, in the axial direction of the rotation center axis C1.

As shown in Figures 2 and 3, the recess 19 includes a bottom surface 19d and a side surface 19e. The bottom surface 19d is disposed between a pair of edge portions 19a in the axial direction of the rotation center axis C1. The bottom surface 19d is disposed on the radial outer portion 17 of the annular connecting portion 7. The bottom surface 19d includes a bottom portion 19b. In the first embodiment, the bottom surface 19d includes a radial outer portion 25 of the connecting base 21 and a radial outer portion 27 of the elastic member 23. The radial outer portion 25 of the connecting base 21 of the bottom surface 19d is disposed between the side surface 19e and the elastic member 23 in the axial direction of the rotation center axis C1.

The side surface 19e is a surface connecting the edge portion 19a and the bottom surface 19d. The side surface 19e is provided between a pair of edge portions 19a in the axial direction of the rotation center axis C1. The side surface 19e is provided, for example, on the radial outer surface 17 of the annular connecting portion 7. The bottom surface 19d is provided between a pair of side surfaces 19e in the axial direction of the rotation center axis C1.

As shown in FIG. 3 , the annular connecting portion 7 includes a connecting base 21, and the connecting base 21 is used to connect the first annular side surface portion 3 and the second annular side surface portion 5. The annular connecting portion 7 includes an elastic member 23. Specifically, the annular connecting portion 7 includes a connecting base 21 and an elastic member 23. The connecting base 21 is used to connect the first annular side surface portion 3 and the second annular side surface portion 5.

The connection base 21 extends in the circumferential direction of the rotation center axis C1. For example, the connection base 21 is formed in a ring shape. A hole 21a for inserting a pipe joint is provided in the connection base 21. The hole 21a penetrates the connection base 21 in the radial direction of the rotation center axis C1.

The connecting base 21 has, for example, a radial outer portion 25. The radial outer portion 25 of the connecting base 21 is defined in the radial direction of the rotation center axis C1. The radial outer portion 25 of the connecting base 21 forms the outer peripheral surface of the connecting base 21. In the axial direction of the rotation center axis C1, the central portion of the radial outer portion 25 of the connecting base 21 is formed, for example, in a concave shape.

The elastic member 23 is annular. For example, the elastic member 23 is formed into an annular shape extending in the circumferential direction of the rotation center axis C1. The elastic member 23 can also be partially arranged in the circumferential direction of the rotation center axis C1. The elastic member 23 is arranged on the connecting base 21. The elastic member 23 is arranged on the radial outer part 25 of the connecting base 21. The elastic member 23 is arranged on the radial outer side of the connecting base 21. For example, in the axial direction of the rotation center axis C1, the elastic member 23 is arranged in the central part of the radial outer part 25 of the connecting base 21.

The elastic member 23 covers the hole 21a of the connection base 21. Specifically, in the axial direction of the rotation center axis C1, the elastic member 23 is used to cover the hole 21a of the connection base 21 and is arranged in the central part of the radial outer part 25 of the connection base 21. The elastic member 23 cannot allow air to penetrate. In other words, air does not pass through the elastic member 23. The elastic member 23 is not breathable.

In the radial direction of the rotation center axis C1, the radial outer portion 27 of the elastic member 23 is defined. The elastic member 23 has a recess 19 in the radial outer portion 27. The recess 19 extends in the circumferential direction of the rotation center axis C1. The elastic member 23 has a recess 19 extending in the circumferential direction of the rotation center axis C1 in the radial outer portion 27 of the elastic member 23.

For example, the elastic member 23 is arranged on the concave radial outer portion 25 of the connecting base 21. The elastic member 23 is provided between a pair of edge portions 19a in the axial direction of the rotation center axis C1. The elastic member 23 is arranged on the concave portion of the radial outer portion 25. In Figures 2 and 3, the elastic member 23 is arranged on the bottom surface 19d. When the elastic member 23 is mounted on the connecting base 21, a recess 19 is formed on the radial outer portion 27. The radial outer portion 27 of the elastic member 23 is arranged on the edge portion 19a closer to the rotation center axis C1 than the radial outer portion 25 of the connecting base 21 in the radial direction of the rotation center axis C1. The radial outer portion 27 of the elastic member 23 is arranged at a position closer to the rotation center axis C1 than the pair of edge portions 19a.

In the radial direction of the rotation center axis C1, as long as the bottom 19b of the recess 19 is formed at a position closer to the rotation center axis C1 than the pair of edge portions 19a, the shape of the radial outer portion 27 of the elastic member 23 can be formed in any manner.

The elastic member 23 has a bottom 19b of the recess 19. For example, the radial outer portion 27 of the elastic member 23 forms the bottom 19b of the recess 19. The bottom 19b of the recess 19 is located at the radial outer portion 27 of the elastic member 23. The bottom 19b of the recess 19 extends in the circumferential direction of the radial outer portion 27 toward the rotation center axis C1. In FIG. 3, the bottom surface 19d of the recess 19 is located at the radial outer portion 27 of the elastic member 23. The bottom surface 19d here is used to define the bottom surface of the minimum radial distance.

The elastic member 23 is arranged, for example, on the concave radial outer portion 25 of the connecting base 21 in a state of being stretched in the circumferential direction of the rotation center axis C1. The elastic member 23 may also be compressed in the thickness direction defined in the radial direction of the rotation center axis C1.

In the bicycle rim 1 having the above structure, the minimum radial distance D defined by the edge 19a and the bottom surface 19d in the radial direction of the rotation center axis C1 is greater than 2.0 mm. The radial distance D is defined by the distance between the edge 19a and the portion closest to the rotation center axis C1 on the radial outer surface 27 of the elastic member 23 in the radial direction of the rotation center axis C1.

Here, the radial outer portion 27 of the elastic member 23 is substantially parallel to the rotation center axis C1. Therefore, the distance between the rotation center axis C1 and the radial outer portion 27 is substantially constant. That is, in the first embodiment, the radial distance D is defined by the distance between the edge 19a and the radial outer portion 27 of the elastic member 23.

As shown in FIG. 3, in the first embodiment, the bottom 19b is provided on the radial outer portion 27 of the elastic member 23. In the first embodiment, the radial distance D is defined by the distance between the edge 19a and the radial outer portion 27 of the elastic member 23. The radial distance D is not defined by the distance between the edge 19a and the radial outer portion 25 of the connecting base 21 of the bottom surface 19d. In the first embodiment, the radial distance D is defined by the minimum radial distance defined by the edge 19a and the bottom surface 19d.

The radial distance D is preferably 4.0 mm or less. In other words, the bicycle rim 1 is preferably made so that the radial distance D is within the range of 2.0 mm or more and 4.0 mm or less.

Here, the radial position of the edge 19a at the radial distance D is obtained, which is the radial outermost surface of the edge 19a. For example, in the case of Figure 3, the radial position of the edge 19a at the radial distance D is obtained, which is the radial outer surface 25 of the connecting base 21. For example, in the case of Figure 6B described later, the radial position of the edge 19a at the radial distance D is obtained, which is the radial outer surface 32 of the sealing member 31.

When the tubeless tire 200 is mounted on the rim 1, the first portion 105a or the second portion 105b of the tire 200 is placed in the recess 19. The first portion 105a and the second portion 105b of the tire 200 are also called tire beads.

Here, for example, the position where the first part 105a or the second part 105b of the tire 200 is placed in the recess 19 is recorded as the first mounting position. And the position on the opposite side of the first mounting position with respect to the radial direction of the rotation center axis C1 is recorded as the second mounting position.

The first part 105a or the second part 105b of the tire 200 is placed in the recess 19 at the first mounting position, and when the tire 200 is stretched from the first mounting position toward the second mounting position, the elastic member 23 is compressed. In this case, the radial distance D becomes larger at the first mounting position. As a result, the tire 200 moves toward the second mounting position. A margin is generated in the circumferential direction of the tire 200.

As a result, it is easy to place the first part 105a or the second part 105b of the tire 200 into the recess 19 at the second mounting position. The first part 105a and the second part 105b of the tire 200 are placed into the recess 19 around the rim 1. The compression amount of the elastic member 23 is, for example, greater than 0.05mm. The compression amount of the elastic member 23 is, for example, more preferably greater than 0.1mm. The compression amount of the elastic member 23 is, for example, more preferably greater than 0.2mm. The compression amount of the elastic member 23 is, for example, less than 1.0mm.

The radial distance D of the elastic member 23 here is mounted on the connection base 21 is represented by D1. The radial distance D of the state in which the tire 200 is stretched from the first mounting position toward the second mounting position and the elastic member 23 is compressed is represented by D2. The radial distance D of the state in which the first part 105a and the second part 105b of the tire 200 are placed in the recess 19 around the rim 1 is represented by D3.

For example, the radial distance D3 is greater than the radial distance D1. The radial distance D3 is less than the radial distance D2. That is, the radial distance D3 is greater than the radial distance D1 and less than the radial distance D2. The radial distance D3 is set in this way. Thus, it is easy to install the tire 200 on the rim 1. And when air enters the tire 200, it is easy to place the first part 105a or the second part 105b on the installation portion 19c.

The mounting portion 19c here is located between each retaining portion 13, 15 and the edge portion 19a. The mounting portion 19c is located on the radial outer portion 17 of the annular connecting portion 7. The mounting portion 19c is also called the bead seat surface. The bead seat surface is used to hold the tire bead of the tire.

<Second implementation method>

The basic structure of the second embodiment is essentially the same as that of the first embodiment. Therefore, the following is a detailed description of the structure that is different from the first embodiment. In the second embodiment, the explanation of the common structure with other embodiments is also adopted by the explanation of other embodiments.

As shown in FIG. 4, the bicycle rim 1 has: a first annular side surface portion 3, a second annular side surface portion 5, and an annular connecting portion 7. The annular connecting portion 7 connects the first annular side surface portion 3 and the second annular side surface portion 5 in the axial direction of the rotation center axis C1 of the bicycle rim 1.

As shown in FIG. 5A, the annular connecting portion 7 connects the first annular side surface portion 3 and the second annular side surface portion 5 in the axial direction of the rotation center axis C1 of the bicycle rim 1. In the radial direction of the rotation center axis C1, a radial outer surface portion 17 of the annular connecting portion 7 is defined. In the radial outer surface portion 17 of the annular connecting portion 7, a recessed portion 19 extending in the circumferential direction of the rotation center axis C1 and having an edge portion 19a and a bottom portion 19b is formed. The recessed portion 19 is formed in the radial outer surface portion 17 of the annular connecting portion 7. The recessed portion 19 has an edge portion 19a and a bottom portion 19b. The recessed portion 19 extends in the circumferential direction of the rotation center axis C1. Specifically, the recessed portion 19 is annular. The recess 19 can also be formed locally in the circumferential direction of the rotation center axis C1.

As shown in FIG. 5A, the recess 19 has: a pair of edges 19a and a bottom 19b. The edge 19a is the end of the recess 19 in the circumferential direction of the rotation center axis C1. The pair of edges 19a are arranged on the opposite sides of the bottom 19b in the axial direction of the rotation center axis C1. The pair of edges 19a are provided on the radial outer portion 17 of the annular connecting portion 7. In the second embodiment, the pair of edges 19a are provided, for example, on the radial outer portion 25 of the connecting base 21 described later. The radial outer portion 17 of the annular connecting portion 7 includes the radial outer portion 25 of the connecting base 21 described later.

The bottom 19b is a portion of the radially outer portion 17 of the recess 19 that is closest to the rotation center axis C1. The region R is a region where the elastic member 23 is arranged in the recess 19 of the annular connecting portion 7. The bottom 19b is a portion of the radially outer portion 17 of the region R that is closest to the rotation center axis C1. The radial position of the bottom 19b is a position of the radially outer portion 17 that is located most radially inward in the region R of the recess 19 where the elastic member 23 is arranged. The radially outer portion 17 is the radially outer portion of the annular connecting portion 7. The annular connecting portion 7 includes a connecting base 21 and an elastic member 23. The annular connecting portion 7 may include a sealing member 31. In the radial direction of the rotation center axis C1, when the connecting base 21, the elastic member 23 and the sealing member 31 are arranged in layers, the most radially outward surface is the radial outer portion 17.

The bottom portion 19b is disposed between a pair of edge portions 19a in the axial direction of the rotation center axis C1. The bottom portion 19b is disposed, for example, in the central portion of the annular connecting portion 7 in the axial direction of the rotation center axis C1. The bottom portion 19b is disposed in the radial outer portion 17 of the annular connecting portion 7. For example, the radial outer portion 17 of the annular connecting portion 7 includes the radial outer portion 27 of the elastic member 23 described later. The bottom portion 19b is disposed, for example, in the central portion of the elastic member 23 in the axial direction of the rotation center axis C1. The bottom portion 19b is located at the radial outer portion 27 of the elastic member 23.

As shown in FIG. 5A and FIG. 5B, the annular connecting portion 7 includes a connecting base 21, and the connecting base 21 is used to connect the first annular side surface 3 and the second annular side surface 5. The connecting base 21 has, for example, a radial outer surface 25. The radial outer surface 25 of the connecting base 21 is defined in the radial direction of the rotation center axis C1. The radial outer surface 25 of the connecting base 21 forms the outer peripheral surface of the connecting base 21. In the axial direction of the rotation center axis C1, the central portion of the radial outer surface 25 of the connecting base 21 is formed into a concave shape. The bottom 19b is located at the radial outer surface 27 of the elastic member 23.

The elastic member 23 is annular. For example, the elastic member 23 is formed into an annular shape extending in the circumferential direction of the rotation center axis C1. The elastic member 23 can also be partially arranged in the circumferential direction of the rotation center axis C1. The elastic member 23 is arranged on the connecting base 21. The elastic member 23 is arranged on the radial outer part 25 of the connecting base 21. The elastic member 23 is arranged on the radial outer side of the connecting base 21. For example, in the axial direction of the rotation center axis C1, the elastic member 23 is arranged in the central part of the radial outer part 25 of the connecting base 21.

The elastic member 23 covers the hole 21a of the connection base 21. Specifically, in the axial direction of the rotation center axis C1, the elastic member 23 is used to cover the hole 21a of the connection base 21 and is arranged in the central part of the radial outer part 25 of the connection base 21. The elastic member 23 cannot allow air to penetrate. In other words, air does not pass through the elastic member 23. The elastic member 23 is not breathable.

In the radial direction of the rotation center axis C1, a radial outer portion 27 of the elastic member 23 is defined. The elastic member 23 has a recess 19 in the radial outer portion 27. The recess 19 extends in the circumferential direction of the rotation center axis C1. The elastic member 23 has a recess 19 extending in the circumferential direction of the rotation center axis C1 in the radial outer portion 17 and the radial outer portion 25 of the elastic member 23.

The elastic member 23 has an uneven radial thickness in the radial direction of the rotation center axis C1. That is, the radial thickness of the elastic member 23 before installation is uneven.

For example, the radial thickness of the elastic member 23 before installation is thickest in the central part of the axial direction of the rotation center axis C1 (refer to Figure 5A). The radial thickness of the elastic member 23 before installation may be thinnest in the central part of the axial direction of the rotation center axis C1. When the elastic member 23 is installed on the connecting base 21, a recess 19 is formed. In the second embodiment, the radial thickness of the elastic member 23 after installation is also not uniform.

The elastic member 23 before installation may have a recessed portion on the radial outer surface 27. The recessed portion of the elastic member 23 extends in the circumferential direction of the rotation center axis C1. In this case, when the elastic member 23 is installed on the connecting base 21, a recessed portion 19 is formed. In this case, the connecting base 21 may have a recessed shape or may not have a recessed shape.

For example, the elastic member 23 is arranged on the concave radial outer portion 25. The elastic member 23 is arranged on the concave portion of the radial outer portion 25. When the elastic member 23 is mounted on the connecting base 21, the radial outer portion 27 is formed with a concave portion 19. The radial outer portion 27 of the elastic member 23 is formed concave in the radial direction of the rotation center axis C1. The radial outer portion 27 of the elastic member 23 here is bent toward the rotation center axis C1 between a pair of edge portions 19a.

In the radial direction of the rotation center axis C1, as long as the bottom 19b of the recess 19 is formed at a position closer to the rotation center axis C1 than the pair of edge portions 19a, the shape of the radial outer portion 27 of the elastic member 23 can be formed in any manner.

The elastic member 23 has a bottom 19b of the recess 19. For example, the radial outer portion 27 of the elastic member 23 forms the bottom 19b of the recess 19. The bottom 19b of the recess 19 is located at the radial outer portion 27 of the elastic member 23. The bottom 19b of the recess 19 extends in the circumferential direction of the radial outer portion 27 toward the rotation center axis C1.

The elastic member 23 is arranged on the concave radial outer portion 25 of the connecting base 21 in a state of being stretched in the circumferential direction of the rotation center axis C1, for example. The elastic member 23 can also be compressed in the thickness direction defined by the radial direction of the rotation center axis C1.

In the bicycle rim 1 having the above-mentioned structure, the radial distance D defined by the edge 19a and the bottom 19b in the radial direction of the rotation center axis C1 is 2.0 mm or more. The radial distance D here is defined by the distance between the edge 19a and the portion of the recess 19 closest to the rotation center axis C1. The radial distance D is the distance from the portion of the recess 19 closest to the rotation center axis C1 to the edge 19a.

Here, the portion of the recess 19 closest to the rotation center axis C1 is located at the radial outer portion 27 of the elastic member 23. That is, the bottom 19b is located at the radial outer portion 27 of the elastic member 23. The bottom 19b is the portion of the elastic member 23 that is closest to the rotation center axis C1 in the region R where the recess 19 is arranged.

The radial distance D is preferably 4.0 mm or less. In other words, the bicycle rim 1 is preferably made so that the radial distance D is within the range of 2.0 mm or more and 4.0 mm or less.

(Variation)

In the second embodiment described above, an example is shown in which the first holding portion 13 has the first locking portion 13a and the second holding portion 15 has the second locking portion 15a. Alternatively, the first holding portion 13 and the second holding portion 15 may be constructed as follows.

For example, as shown in FIG. 5B, the first retaining portion 13 includes: a first retaining surface 13b extending radially outwardly of the first annular side portion 3. The first retaining surface 13b can contact the tire 200. The first retaining surface 13b extends in the circumferential direction of the rotation center axis C1. The first retaining portion 13 does not have the first locking portion 13a. The second retaining portion 15 does not have the second locking portion 15a. That is, the structure shown in FIG. 5B is a structure in which the first locking portion 13a and the second locking portion 15a are deleted from the retaining portion 9 of the structure shown in FIG. 5A.

The second retaining portion 15 includes: a second retaining surface 15b extending radially outwardly of the second annular side surface 5. The second retaining surface 15b can contact the tire 200. The second retaining surface 15b extends in the circumferential direction of the rotation center axis C1. The second retaining surface 15b is arranged to be opposite to the first retaining surface 13b in the axial direction of the rotation center axis C1. In other words, the radial inner portion of the tire 200 is clamped by the first retaining surface 13b and the second retaining surface 15b. For example, the radial inner portion of the tire 200 is the first portion 105a and the second portion 105b.

<Implementation Method No. 3>

The structure of the third embodiment is essentially the same as that of the second embodiment, except for the structure of the sealing member 31. Therefore, the following is a detailed description of the structure that is different from the second embodiment. In the third embodiment, the explanation of the common structure with other embodiments is also adopted.

As shown in FIG. 4, the bicycle rim 1 has: a first annular side surface portion 3, a second annular side surface portion 5, and an annular connecting portion 7. The annular connecting portion 7 connects the first annular side surface portion 3 and the second annular side surface portion 5 in the axial direction of the rotation center axis C1 of the bicycle rim 1.

As shown in FIG. 6A, the annular connecting portion 7 further includes a sealing member 31 disposed between the connecting base 21 and the elastic member 23 in the radial direction of the rotation center axis C1. In other words, the annular connecting portion 7 includes the connecting base 21, the elastic member 23, and the sealing member 31. The sealing member 31 cannot allow air to penetrate. In other words, air does not pass through the sealing member 31. The sealing member 31 is not breathable. The elastic member 23 allows air to penetrate. In other words, air passes through the elastic member 23. The elastic member 23 may not allow air to penetrate. In other words, air may not pass through the elastic member 23.

The annular connecting portion 7, in the radial direction of the rotation center axis C1, further includes: a sealing member 31 arranged on at least one of the outer side of the elastic member 23 and the inner side of the elastic member 23. As shown in FIG. 6A, an example is shown in which the sealing member 31 is arranged on the inner side of the elastic member 23 in the radial direction of the rotation center axis C1. That is, the annular connecting portion 7, in the radial direction of the rotation center axis C1, further includes: a sealing member 31 arranged between the connecting base 21 and the elastic member 23.

The sealing member 31 covers the hole 21a of the connecting base 21. Thus, the sealing member 31 prevents air from passing through the hole 21a. The sealing member 31 is arranged on the radial outer surface 25 of the connecting base 21. The sealing member 31 is provided between a pair of edge portions 19a in the axial direction of the rotation center axis C1. The sealing member 31 extends in the circumferential direction of the rotation center axis C1.

The sealing member 31 is preferably a tape member having an adhesive surface. In this case, the sealing member 31 is attached to the connecting base 21. For example, the sealing member 31 is attached to the radial outer portion 25 of the connecting base 21 to cover the hole portion 21a of the connecting base 21. The sealing member 31 may also be an annular rubber tape member. In this case, the sealing member 31 is elastically mounted on the connecting base 21.

The sealing member 31 is arranged between the elastic member 23 and the connecting base 21 in the axial direction of the rotation center axis C1. The radial outer portion 27 of the elastic member 23 is formed into a concave shape when at least mounted on the connecting base 21, similarly to the second embodiment described above. Thereby, the radial outer portion 27 of the elastic member 23 arranged on the radial outer portion 32 of the sealing member 31 is also formed into a concave shape.

The elastic member 23 has a non-uniform radial thickness in the radial direction of the rotation center axis C1. Similarly, the sealing member 31 has a non-uniform radial thickness in the radial direction of the rotation center axis C1. In this case, the recess 19 is also formed in the state where the elastic member 23 and the sealing member 31 are mounted on the connecting base 21.

In the bicycle rim 1 having the above-mentioned structure, the radial distance D defined by the edge 19a and the bottom 19b in the radial direction of the rotation center axis C1 is greater than 2.0 mm. The radial distance D is preferably less than 4.0 mm. In other words, the bicycle rim 1 is preferably made so that the radial distance D is within the range of greater than 2.0 mm and less than 4.0 mm.

As described above, the radial position of the edge 19a when the radial distance D is obtained is the radial outermost surface of the edge 19a. In the case of Figure 6A, the radial position of the edge 19a when the radial distance D is obtained is the radial outer surface 25 of the connecting base 21.

(Variation)

In the third embodiment described above, an example is shown in which the sealing member 31 is arranged between a pair of edge portions 19a. However, the sealing member 31 may also be configured as follows.

For example, as shown in FIG. 6B , the sealing member 31 is disposed between the first retaining portion 13 and the second retaining portion 15 in the axial direction of the rotation center axis C1. The sealing member 31 is disposed on the radial outer surface 25 of the connecting base 21.

The annular connecting portion 7 has a mounting portion 19c on the axially outer side of the rotation center axis C1 of a pair of edge portions 19a. The sealing member 31 extends to the mounting portion 19c. The mounting portion 19c is a portion for mounting the first portion 105a and the second portion 105b of the tire 200. The mounting portion 19c is provided between the first retaining portion 13 and the edge portion 19a. The mounting portion 19c is provided between the second retaining portion 15 and the edge portion 19a.

The sealing member 31 has a radial outer portion 32. The radial outer portion 32 of the sealing member 31 is defined in the radial direction of the rotation center axis C1. A pair of edge portions 19a are provided on the radial outer portion 17 of the annular connecting portion 7. In a variation of the third embodiment, a pair of edge portions 19a are provided, for example, on the radial outer portion 32 of the sealing member 31.

The radial outer portion 17 of the recess 19 is the radial outer portion 27 of the elastic member 23. The bottom 19b is provided on the radial outer portion 27 of the elastic member 23. The radial outer portion 17 of the mounting portion 19c is the radial outer portion 32 of the sealing member 31. The edge 19a is provided on the radial outer portion 32 of the sealing member 31. The radial outer portion 17 of the annular connecting portion 7 is the radial outer portion 27 of the elastic member 23 and the radial outer portion 32 of the sealing member 31. In a modification of the third embodiment, the radial outer portion 25 of the connecting base 21 is not the radial outer portion 17 of the annular connecting portion 7.

In this case, the radial distance D defined by the edge 19a and the bottom 19b in the radial direction of the rotation center axis C1 is greater than 2.0 mm. The radial distance D is preferably less than 4.0 mm. In other words, the bicycle rim 1 is preferably made so that the radial distance D is within the range of greater than 2.0 mm and less than 4.0 mm.

In the variation of the third embodiment, the radial distance D is defined by the edge 19a of the radial outer portion 32 of the sealing member 31 and the bottom 19b of the radial outer portion 27 of the elastic member 23 in the radial direction of the rotation center axis C1.

<Implementation Method No. 4>

The structure of the fourth embodiment is essentially the same as that of the second embodiment, except for the structure of the sealing member 131. Therefore, the following is a detailed description of the structure that is different from the second embodiment. In the fourth embodiment, the explanation of the common structure with other embodiments is also adopted.

As shown in FIG. 4, the bicycle rim 1 has: a first annular side surface portion 3, a second annular side surface portion 5, and an annular connecting portion 7. The annular connecting portion 7 connects the first annular side surface portion 3 and the second annular side surface portion 5 in the axial direction of the rotation center axis C1 of the bicycle rim 1.

As shown in FIG. 7A , the annular connecting portion 7 includes a sealing member 131. That is, the annular connecting portion 7 includes: a connecting base 21, an elastic member 23, and a sealing member 131. The elastic member 23 allows air to pass through. That is, air passes through the elastic member 23. The elastic member 23 may not allow air to pass through. That is, air may not pass through the elastic member 23.

The annular connecting portion 7 further includes a sealing member 131 disposed on at least one of the outer side of the elastic member 23 and the inner side of the elastic member 23 in the radial direction of the rotation center axis C1. As shown in FIG. 7A, an example is shown in which the sealing member 131 is disposed on the outer side of the elastic member 23 in the radial direction of the rotation center axis C1. The annular connecting portion 7 further includes a sealing member 131 disposed on the outer side of the elastic member 23 in the radial direction of the rotation center axis C1 of the bicycle rim 1. The sealing member 131 is disposed on the outer side of the elastic member 23 in the radial direction of the rotation center axis C1. That is, the annular connecting portion 7 further includes a sealing member 131 disposed on the outer side of the elastic member 23 in the radial direction of the rotation center axis C1. The elastic member 23 is disposed on the outer side of the connecting base 21 in the radial direction of the rotation center axis C1.

The elastic member 23 covers the hole portion 21a of the connecting base 21. The sealing member 131 covers the elastic member 23. The sealing member 131 is used to cover at least the entire area of the elastic member 23 of the radial outer portion 17 of the annular connecting portion 7. In Figures 7A and 7B, the sealing member 131 covers the entire radial outer portion 27 of the elastic member 23. For example, in the structure shown in Figure 3, the sealing member 131 covers the entire radial outer portion 27 and the side surface of the elastic member 23. For example, the side surface of the elastic member 23 is the two side surfaces in the axial direction of the rotation center axis C1. Thus, the sealing member 131 prevents air from passing through the hole 21a and the elastic member 23.

The annular connecting portion 7 connects the first annular side surface portion 3 and the second annular side surface portion 5 in the axial direction of the rotation center axis C1 of the bicycle rim 1, and includes: an elastic member 23, and a sealing member 131 arranged on the outer side of the elastic member 23 in the radial direction of the rotation center axis C1 of the bicycle rim 1. The annular connecting portion 7 includes a connecting base 21, and the connecting base 21 is used to connect the first annular side surface portion 3 and the second annular side surface portion 5. In the radial direction of the rotation center axis C1, a radial outer surface portion 17 of the annular connecting portion 7 is defined. In the radial outer surface portion 17, a recess 19 extending in the circumferential direction of the rotation center axis C1 is formed.

The annular connecting portion 7 has a mounting portion 19c on the axially outer side of the rotation center axis C1 of a pair of edge portions 19a. The sealing member 131 extends to the mounting portion 19c. The sealing member 131 has a radial outer portion 32. The radial outer portion 32 of the sealing member 131 is defined in the radial direction of the rotation center axis C1. A pair of edge portions 19a are provided on the radial outer portion 17 of the annular connecting portion 7. Therefore, in the fourth embodiment, the edge portion 19a is provided on the radial outer portion 32 of the sealing member 131.

The sealing member 131 is arranged on the radial outer portion 27 of the elastic member 23 and the radial outer portion 25 of the connecting base 21. Specifically, the sealing member 131 is arranged on the radial outer portion 27 of the elastic member 23 at the central portion in the axial direction of the rotation center axis C1 of the sealing member 131. The axial end portion of the rotation center axis C1 of the sealing member 131 is arranged on the radial outer portion 25 of the connecting base 21. The axial end portion of the rotation center axis C1 of the sealing member 131 is arranged on the mounting portion 19c.

The sealing member 131 is disposed between the first retaining portion 13 and the second retaining portion 15 in the axial direction of the rotation center axis C1. The sealing member 131 extends in the circumferential direction of the rotation center axis C1.

The sealing member 131 is preferably a tape member having an adhesive surface. In this case, the sealing member 131 is attached to the radial outer portion 25 of the connecting base 21 and the radial outer portion 27 of the elastic member 23. The sealing member 131 may also be an annular rubber tape member. In this case, the sealing member 131 is elastically mounted on the connecting base 21 and the elastic member 23.

The elastic member 23 is disposed between the sealing member 131 and the connecting base 21 in the radial direction of the rotation center axis C1. The radial outer portion 27 of the elastic member 23 is formed into a concave shape when at least mounted on the connecting base 21, similarly to the second and third embodiments described above. Thereby, the radial outer portion 32 of the sealing member 131 disposed on the radial outer portion 27 of the elastic member 23 is also formed into a concave shape similarly to the radial outer portion 27 of the elastic member 23.

The elastic member 23 has an uneven radial thickness in the radial direction of the rotation center axis C1. Similarly, the sealing member 131 has an uneven radial thickness in the radial direction of the rotation center axis C1. In this case, the elastic member 23 and the sealing member 131 are also formed into a concave shape when they are installed on the connecting base 21.

A pair of edge portions 19a are provided on the radial outer portion 17 of the annular connecting portion 7. In the fourth embodiment, a pair of edge portions 19a are provided, for example, on the radial outer portion 32 of the sealing member 131. The bottom portion 19b is provided on the radial outer portion 17 of the annular connecting portion 7. In the fourth embodiment, the bottom portion 19b is provided, for example, on the radial outer portion 32 of the sealing member 131. For example, in the axial direction of the rotation center axis C1, the bottom portion 19b is provided at the central portion of the radial outer portion 32 of the sealing member 131.

In the bicycle rim 1 having the above-mentioned structure, the radial distance D defined by the edge 19a and the bottom 19b in the radial direction of the rotation center axis C1 is greater than 2.0 mm. The radial distance D is preferably less than 4.0 mm. In other words, the bicycle rim 1 is preferably made so that the radial distance D is within the range of greater than 2.0 mm and less than 4.0 mm.

As described above, the radial position of the edge 19a when the radial distance D is obtained is the radially outermost surface of the edge 19a. In the fourth embodiment, a pair of edges 19a are provided, for example, on the radially outer surface 32 of the sealing member 131. As described above, the radial position of the bottom 19b when the radial distance D is obtained is the radially outermost surface of the bottom 19b. In the fourth embodiment, the bottom 19b is provided, for example, on the radially outer surface 32 of the sealing member 131.

(Variation)

In the fourth embodiment described above, an example is shown in which the sealing member 131 is arranged between the first retaining portion 13 and the second retaining portion 15. However, the sealing member 131 may also be configured as follows.

For example, as shown in FIG. 7B, the sealing member 131 is disposed between a pair of edge portions 19a in the axial direction of the rotation center axis C1. The sealing member 131 and the elastic member 23 are disposed between a pair of edge portions 19a in the axial direction of the rotation center axis C1. The sealing member 131 and the elastic member 23 are disposed on the inner side of the pair of edge portions 19a in the radial direction of the rotation center axis C1. That is, the sealing member 131 does not extend to the pair of edge portions 19a.

A pair of edge portions 19a are provided on the radial outer portion 17 of the annular connecting portion 7. In a modification of the fourth embodiment, a pair of edge portions 19a are provided, for example, on the radial outer portion 25 of the connecting base 21. The bottom portion 19b is provided on the radial outer portion 17 of the annular connecting portion 7. In a modification of the fourth embodiment, the bottom portion 19b is provided, for example, on the radial outer portion 32 of the sealing member 131.

The sealing member 131 covers the elastic member 23. The sealing member 131 is used to cover at least the entire area of the elastic member 23 of the radial outer portion 17 of the annular connecting portion 7. The sealing member 131 covers the entire radial outer portion 27 of the elastic member 23. Thereby, the sealing member 131 prevents air from passing through the hole 21a and the elastic member 23.

In this case, the radial distance D defined by the edge 19a and the bottom 19b in the radial direction of the rotation center axis C1 is greater than 2.0 mm. The radial distance D is preferably less than 4.0 mm. In other words, the bicycle rim 1 is preferably made so that the radial distance D is within the range of greater than 2.0 mm and less than 4.0 mm.

In a variation of the fourth embodiment, the radial distance D is defined by connecting the edge 19a of the radial outer portion 25 of the base 21 and the bottom 19b of the radial outer portion 32 of the sealing member 131 in the radial direction of the rotation center axis C1.

<Other implementation methods>

Although the above is an explanation of one embodiment of the present invention, the present invention is not limited to the above embodiment, and various changes can be made without departing from the scope of the invention.

(A) In the third and fourth embodiments described above, the first locking portion 13a and the second locking portion 15a are examples of locking the tire 200. A rim having the locking portions 13a and 15a is also called a hook-type rim. Instead of this method, the tire 200 may be held by the first holding surface 13b and the second holding surface 15b shown in FIG. 5B. The first holding portion 13 does not have the first locking portion 13a. Similarly, the second holding portion 15 does not have the second locking portion 15a. A rim having the locking portions 13a and 15a is also called a straight-edge rim.

(B) In the above-mentioned first to fourth embodiments, an example of forming the elastic member 23 into a ring shape is shown. Instead of this method, the elastic member 23 can also be formed into an arc shape. In this case, at least one arc-shaped elastic member 23 is arranged on the radial outer side of the connecting base 21. For example, a plurality of arc-shaped elastic members 23 can also be arranged in a continuous arrangement in the circumferential direction of the rotation center axis C1, or arranged at intervals from each other.

3: 1st annular side face

5: Second annular side face

7: Ring connection

9: Maintaining part

13: First holding part

13a: First stopper

15: Second holding part

15a: Second stopper

17: The radial outer side of the annular connection

19: Concave

19a: Margin

19b: Bottom

19c: Installation

19d: Bottom

19e: Side

21: Connect the base

21a: Hole

23: Elastic components

25: Connect the radial outer part of the base

27: The radial outer part of the elastic member

105a: Part 1

105b: Part 2

200:Tire

C1: Rotation center axis

D: Radial distance

R:Region

Claims (35)

A bicycle rim is used to mount a tire; the bicycle rim comprises: a first annular side surface portion, a second annular side surface portion, and an annular connecting portion; the annular connecting portion connects the first annular side surface portion and the second annular side surface portion in the axial direction of the rotation center axis of the bicycle rim, and comprises an elastic member; in the radial direction of the rotation center axis, The radial outer portion of the annular connecting portion is defined; the radial outer portion is formed with: a concave portion extending in the circumferential direction of the rotation center axis and having an edge, a bottom surface and a side surface; the minimum radial distance defined by the edge and the bottom surface in the radial direction is greater than 2.0 mm; the bottom surface is in direct contact with the elastic member; the elastic member is separated from the side surface. As in claim 1, the bicycle rim, wherein the radial distance is less than 4.0 mm. As in claim 1, the bicycle rim, wherein the bottom surface of the recess is located on the radially outer side of the elastic member. As in claim 1, the bicycle rim, wherein the annular connecting portion includes a connecting base, the connecting base is used to connect the first annular side surface portion and the second annular side surface portion; the elastic member is arranged radially outward of the connecting base. As in claim 1, the bicycle rim, wherein the elastic member abuts against the bottom surface without passing through other members. As in claim 1, the bicycle rim, wherein the annular connection portion further comprises: a sealing member disposed further outward of the elastic member in the radial direction. As in claim 6, the bicycle rim, wherein the annular connecting portion has a mounting portion on the outer side of the rotation center axis of the pair of edge portions in the axial direction; the sealing member extends to the mounting portion. A bicycle rim for mounting a tire; the bicycle rim comprises: a first annular side surface portion, a second annular side surface portion, and an annular connecting portion; the annular connecting portion connects the first annular side surface portion and the second annular side surface portion in the axial direction of the rotation center axis of the bicycle rim, and comprises an elastic member; the radial outer surface of the annular connecting portion is defined in the radial direction of the rotation center axis; The radial outer portion is formed with: a concave portion extending in the circumferential direction of the rotation center axis and having an edge and a bottom; the radial distance defined by the edge and the bottom in the radial direction is greater than 2.0 mm; the radial outer portion of the elastic member is bent toward the rotation center axis; a sealing member is arranged in the radial direction of the bicycle rim relative to the rotation center axis and further inward than the elastic member. As in claim 8, the bicycle rim, wherein the bottom portion is the portion of the area where the elastic member is disposed in the recessed portion that is closest to the rotation center axis. As in claim 8, the bicycle rim, wherein the radial distance is less than 4.0 mm. As in claim 8, the bicycle rim, wherein the bottom is located on the radially outer side of the elastic member. As in claim 8, the bicycle rim, wherein the annular connecting portion includes a connecting base, the connecting base is used to connect the first annular side surface portion and the second annular side surface portion; the elastic member is arranged radially outward of the connecting base. As in claim 12, the bicycle rim, wherein the annular connecting portion includes: the sealing member disposed in the radial direction between the connecting base and the elastic member. As in claim 13, the bicycle rim, wherein the annular connecting portion has a mounting portion on the outer side of the rotation center axis of the pair of edge portions in the axial direction; the sealing member extends to the mounting portion. As in claim 8, the bicycle rim, wherein the annular connection portion further comprises: a sealing member disposed further outward of the elastic member in the radial direction. As in claim 15, the bicycle rim, wherein the annular connecting portion has a mounting portion on the outer side of the rotation center axis of the pair of edge portions in the axial direction; the sealing member extends to the mounting portion. A bicycle rim for mounting a tire; the bicycle rim comprises: a first annular side surface, a second annular side surface, and an annular connecting portion; the annular connecting portion connects the first annular side surface and the second annular side surface in the axial direction of the rotation center axis of the bicycle rim; the annular connecting portion comprises an elastic member and a sealing member; the sealing member is arranged on the outer side of the elastic member in the radial direction of the rotation center axis of the bicycle rim; the elastic member has a non-uniform radial thickness in the radial direction. As in claim 17, the bicycle rim, wherein the radial outer portion of the annular connecting portion is defined in the radial direction; and the radial outer portion is formed with: a recess extending in the circumferential direction toward the rotation center axis. As in claim 17, the bicycle rim, wherein the annular connecting portion includes a connecting base, the connecting base is used to connect the first annular side surface portion and the second annular side surface portion; the elastic member is arranged on the outer side of the connecting base in the radial direction. A bicycle rim for mounting a tire; the bicycle rim comprises: a first annular side surface portion, a second annular side surface portion, and an annular connecting portion; the annular connecting portion connects the first annular side surface portion and the second annular side surface portion in the axial direction of the rotation center axis of the bicycle rim and includes an elastic member; , defining the radial outer portion of the annular connecting portion; the elastic member has a non-uniform radial thickness in the radial direction; the elastic member has a concave portion extending in the circumferential direction of the rotation center axis at the radial outer portion of the annular connecting portion and at the radial outer portion of the elastic member; the radial outer portion of the elastic member is bent toward the rotation center axis. As in claim 20, the bicycle rim, wherein the annular connection portion further comprises: a sealing member disposed radially on at least one of the outer side of the elastic member and the inner side of the elastic member. A bicycle rim as claimed in any one of claims 6 to 7, 13 to 19 and 21, wherein the sealing component is a tape component having an adhesive surface. A bicycle rim as claimed in any one of claims 6 to 7, 13 to 19 and 21, wherein the sealing member is an annular rubber band member. A bicycle rim as claimed in any one of claims 6 to 7, 13 to 19 and 21, wherein the elastic member allows air to pass through. A bicycle rim as claimed in any one of claims 1 to 21, wherein the elastic member is impermeable to air. A bicycle rim as claimed in any one of claims 1 to 21, wherein the elastic member is ring-shaped. A bicycle rim as claimed in any one of claims 1 to 21, wherein the recess is ring-shaped. A bicycle rim as claimed in any one of claims 1 to 21, wherein at least one of the first annular side surface, the second annular side surface, and the annular connecting portion comprises a non-metallic material. For example, in the bicycle rim of claim 28, the non-metallic material is a fiber composite material. A bicycle rim as claimed in any one of claims 1 to 21, wherein at least one of the first annular side surface, the second annular side surface, and the annular connecting portion comprises a metal material. As in claim 30, the bicycle rim, wherein the metal material is aluminum. A bicycle rim as claimed in any one of claims 1 to 21, wherein the first annular side surface and the second annular side surface each have a retaining portion provided along the outer periphery for retaining the tire. As in claim 32, the bicycle rim, wherein the retaining portion comprises: a first retaining portion disposed on the radially outer side of the first annular side surface portion, and a second retaining portion disposed on the radially outer side of the second annular side surface portion. As in claim 33, the bicycle rim, wherein the first retaining portion includes: a first retaining surface extending toward the radially outward side of the first annular side surface portion; and the second retaining portion includes: a second retaining surface extending toward the radially outward side of the second annular side surface portion. A bicycle rim as claimed in claim 33, wherein the first retaining portion includes: a first locking portion arranged on the radially outer side of the first annular side surface; and the second retaining portion includes: a second locking portion arranged on the radially outer side of the second annular side surface.

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