TW201900496A - Bicycle sprocket - Google Patents

Abstract

A bicycle sprocket comprises a sprocket body and a plurality of sprocket teeth including at least one first tooth to initially disengage with the bicycle chain in a shifting operation where the bicycle chain shifts from the bicycle sprocket to an adjacent smaller bicycle sprocket. At least one second tooth is disposed adjacent to the at least one first tooth at an upstream side of the at least one first tooth in a driving rotational direction of the bicycle sprocket. The at least one second tooth has a first tooth height. At least one third tooth is disposed adjacent to the at least one second tooth at the upstream side of the at least one second tooth. The at least one third tooth has a second tooth height longer than the first tooth height.

Description

Bicycle sprocket

The invention relates to a bicycle sprocket.

Bicycle activity is becoming an increasingly popular form of entertainment and transportation. In addition, bicycle activities have become a very popular competitive sport for both amateurs and professionals. Whether the bicycle is used for recreation, transportation or competition, the bicycle industry is continually improving the various components of the bicycle. One bicycle component that has been extensively redesigned is a bicycle sprocket.

According to a first aspect of the invention, a bicycle sprocket includes a sprocket body and a plurality of sprocket teeth. A plurality of sprocket teeth are disposed on the outer circumference of the sprocket body. The plurality of sprocket teeth includes at least one first tooth, at least one second tooth, and at least one third tooth. At least one first tooth is detached from the bicycle chain prior to displacement of the bicycle chain from the bicycle sprocket to adjacent the smaller bicycle sprocket. The at least one second tooth is disposed to the at least one first tooth on the bicycle with no teeth between the at least one first tooth and the at least one second tooth in a circumferential direction with respect to a central axis of rotation of the bicycle sprocket The upstream side in the driving rotational direction of the sprocket is adjacent to the at least one first tooth. At least one second tooth has a first tooth height. The at least one third tooth is disposed adjacent to the at least one second tooth at an upstream side of the at least one second tooth without any teeth in the circumferential direction between the at least one second tooth and the at least one third tooth . The at least one third tooth has a second tooth height that is longer than the first tooth height.

With the bicycle sprocket according to the first aspect, it is possible to reduce the possibility of at least one second tooth interfering with the outward displacement movement of the bicycle chain when the at least one first tooth is disengaged from the bicycle chain. Therefore, it is possible to facilitate the outward shift operation.

According to a second aspect of the invention, the bicycle sprocket according to the first aspect is constructed such that the first tooth height is at least 1.0 mm shorter than the second tooth height.

With the bicycle sprocket according to the second aspect, it is possible to further reduce the possibility of at least one second tooth interfering with the outward displacement movement of the bicycle chain when the at least one first tooth is disengaged from the bicycle chain. Therefore, it is possible to further facilitate the outward shift operation.

According to a third aspect of the invention, the bicycle sprocket according to the second aspect is constructed such that the first tooth height is shorter by 1.1 mm to 1.6 mm than the second tooth height.

With the bicycle sprocket according to the third aspect, it is possible to further reduce the possibility of at least one second tooth interfering with the outward displacement movement of the bicycle chain when the at least one first tooth is disengaged from the bicycle chain. Therefore, it is possible to further facilitate the outward shift operation.

According to a fourth aspect of the invention, the bicycle sprocket according to any one of the first to third aspects is constructed such that the plurality of sprocket teeth further comprises at least one additional tooth to shift the bicycle chain from the bicycle sprocket to In the displacement operation adjacent to the smaller bicycle sprocket, the bicycle chain is first detached. The at least one additional tooth is disposed adjacent to the at least one at a downstream side of the at least one first tooth in the driving rotational direction with no teeth in the circumferential direction between the at least one first tooth and the at least one additional tooth First tooth.

With the bicycle sprocket according to the fourth aspect, it is possible to facilitate the outward shifting operation even in the case where the total number of teeth of the bicycle sprocket is an odd number.

According to a fifth aspect of the invention, the bicycle sprocket according to any one of the first to fourth aspect, wherein the at least one second tooth has a driving surface, a non-driving surface opposite to the driving surface in the circumferential direction, and Connect the tip of the drive surface to the non-drive surface. The tip has a length in the circumferential direction that is shorter than or equal to 1.5 mm.

With the bicycle sprocket according to the fifth aspect, it is possible to further reduce the possibility of at least one second tooth interfering with the outward displacement movement of the bicycle chain when the at least one first tooth is disengaged from the bicycle chain. Therefore, it is possible to further facilitate the outward shift operation.

According to a sixth aspect of the invention, a bicycle sprocket includes a sprocket body and a plurality of sprocket teeth. A plurality of sprocket teeth are disposed on the outer circumference of the sprocket body. The plurality of sprocket teeth includes at least one first tooth and at least one second tooth. At least one first tooth is configured to disengage from the bicycle chain prior to displacement of the bicycle chain from the bicycle sprocket to adjacent the smaller bicycle sprocket. The at least one second tooth is disposed to the at least one first tooth on the bicycle with no teeth between the at least one first tooth and the at least one second tooth in a circumferential direction with respect to a central axis of rotation of the bicycle sprocket The upstream side in the driving rotational direction of the sprocket is adjacent to the at least one first tooth. The at least one second tooth has a drive surface and a non-driven surface that is opposite the drive surface in a circumferential direction. The at least one second tooth has a first rim height at the drive surface and a second rim height at the non-drive surface. The first tooth edge height is at least 0.5 mm longer than the second tooth edge height.

With the bicycle sprocket according to the sixth aspect, it is possible to reduce the possibility of at least one second tooth interfering with the outward displacement movement of the bicycle chain when the at least one first tooth is disengaged from the bicycle chain. Therefore, it is possible to facilitate the outward shift operation.

According to a seventh aspect of the invention, the bicycle sprocket according to the sixth aspect is constructed such that the at least one second tooth has a tooth tip connecting the driving surface and the non-driving surface. The tip has a length in the circumferential direction that is shorter than or equal to 1.5 mm.

With the bicycle sprocket according to the seventh aspect, it is possible to further reduce the possibility of at least one second tooth interfering with the outward displacement movement of the bicycle chain when the at least one first tooth is disengaged from the bicycle chain. Therefore, it is possible to further facilitate the outward shift operation.

According to an eighth aspect of the invention, the bicycle sprocket according to the sixth or seventh aspect is constructed such that the at least one first tooth has an additional driving surface facing the non-driving surface in the circumferential direction. The at least one first tooth has a third rim height that is longer than the first rim height at the additional drive surface.

With the bicycle sprocket according to the eighth aspect, it is possible to further reduce the possibility of at least one second tooth interfering with the outward displacement movement of the bicycle chain when the at least one first tooth is disengaged from the bicycle chain. Therefore, it is possible to further facilitate the outward shift operation.

According to a ninth aspect of the invention, the bicycle sprocket according to any one of the sixth to eighth aspects is constructed such that the plurality of sprocket teeth further comprises at least one additional tooth to shift the bicycle chain from the bicycle sprocket to In the displacement operation adjacent to the smaller bicycle sprocket, the bicycle chain is first detached. The at least one additional tooth is disposed adjacent to the at least one at a downstream side of the at least one first tooth in the driving rotational direction with no teeth in the circumferential direction between the at least one first tooth and the at least one additional tooth First tooth.

With the bicycle sprocket according to the ninth aspect, it is possible to facilitate the outward shifting operation even in the case where the total number of teeth of the bicycle sprocket is an odd number.

Embodiments will now be described with reference to the accompanying drawings, in which the same element symbols indicate corresponding or equivalent elements throughout the various figures. First embodiment

Referring first to Figure 1, a bicycle multiple sprocket assembly 1 including a bicycle sprocket 10 in accordance with a first embodiment is illustrated. The bicycle multi-sprocket assembly 1 is constructed to engage the bicycle chain C. In this embodiment, the bicycle multiple sprocket assembly 1 includes twelve bicycle sprockets S1 to S12. The bicycle multi-sprocket assembly 1 has a rotation center axis A1. The bicycle multi-sprocket assembly 1 is rotatable in the driving rotational direction D11 about the rotation center axis A1 during the pedaling. The driving rotational direction D11 is defined along the circumferential direction D1 of the bicycle multi-sprocket assembly 1 with respect to the rotational central axis A1.

As seen in Fig. 1, the bicycle multiple sprocket assembly 1 further includes a hub engagement structure 2 that is constructed to engage the bicycle hub assembly 4 (see Fig. 2). Although the bicycle multiple sprocket assembly 1 is a bicycle rear sprocket assembly in the illustrated embodiment, the structure of the bicycle multiple sprocket assembly 1 can be applied to the front sprocket if needed and/or desired. to make. Each of the bicycle sprockets S1 to S12 is a bicycle rear sprocket in this embodiment, and the structure of the bicycle sprockets S1 to S12 can be applied to the bicycle front sprocket.

In the present application, the following directional terms "front", "back", "forward", "backward", "left", "right", "cross-section", "upward" and "downward", and Any other similar directional term refers to those directions that are determined based on a user (e.g., a knight) sitting on a saddle (not shown) of the bicycle and facing the handlebar (not shown). Accordingly, the terms used to describe the bicycle multi-sprocket assembly 1 should be interpreted relative to a bicycle (not shown) equipped with a bicycle multi-sprocket assembly 1 for use in an upright riding position on a horizontal surface.

As seen in Fig. 2, the bicycle sprocket wheels S1 to S12 are arranged in an axial direction D2 parallel to the rotation center axis A1. The bicycle sprockets S1 to S12 are spaced apart from each other in the axial direction D2. The bicycle multi-sprocket assembly 1 includes spacers SP1 to SP11. Each of the spacers SP1 to SP11 is disposed between adjacent two sprockets of the bicycle sprockets S1 to S12. Inside such a spacer, a sprocket support 6 to which a plurality of bicycle sprocket wheels are mounted is used. However, the sprocket support 6 can be omitted. In such a case, all of the sprockets S1 through S12 can be constructed to directly engage the bicycle hub assembly 4.

The bicycle sprocket S1 has the largest outer diameter of the bicycle sprocket S1 to S12. The bicycle sprocket S12 has the smallest outer diameter of the bicycle sprocket S1 to S12. The bicycle sprocket S1 is closer to the bicycle center plane CP of the bicycle frame (not shown) than the bicycle sprocket S12 in a state where the bicycle multi-sprocket assembly 1 is mounted to the bicycle hub assembly 4. For example, when the bicycle chain C is displaced from the larger sprocket to the adjacent smaller sprocket in the outward displacement direction D31 by the rear derailleur RD, an outward displacement occurs. Inward displacement occurs when the bicycle chain C is displaced from the smaller sprocket to the adjacent larger sprocket in the inward displacement direction D32 by the rear derailleur RD. In the present application, the outward shifting operation and the inward shifting operation can collectively be referred to as a shifting operation.

The bicycle sprocket S1 will be described in detail below as the bicycle sprocket 10. The bicycle sprocket wheels S2 to S12 have substantially the same structure as that of the bicycle sprocket 10. Therefore, for the sake of brevity, they will not be described in detail herein.

As seen in Figure 2, the bicycle sprocket 10 includes an outwardly facing side OFS and an inwardly facing side IFS. The outward facing side OFS faces the axial direction D2 parallel to the rotation center axis A1. The inwardly facing side IFS faces the axial direction D2. The inwardly facing side IFS is opposite to the outward facing side OFS in the axial direction D2. More specifically, the outward facing side OFS faces the outward direction D21. The inwardly facing side IFS faces in the inward direction D22. The inward direction D22 faces the bicycle center plane CP. The outward direction D21 is the reverse direction of the inward direction D22. The axial direction D2 is a bidirectional direction including an outward direction D21 and an inward direction D22.

FIG. 3 illustrates the outward facing side OFS of the bicycle sprocket 10. FIG. 4 illustrates the inwardly facing side IFS of the bicycle sprocket 10. As seen in Figures 3 and 4, the bicycle sprocket 10 includes a sprocket body 12 and a plurality of sprocket teeth 14. The sprocket body 12 includes an outer circumference 16 disposed about a central axis of rotation A1 of the bicycle sprocket 10. The outer circumference 16 is the base circle of the bicycle sprocket 10. A plurality of sprocket teeth 14 are disposed on the outer circumference 16 of the sprocket body 12. A plurality of sprocket teeth 14 are constructed to engage the bicycle chain C. The sprocket body 12 is constructed to be rotatable about a central axis of rotation A1. A plurality of sprocket teeth 14 extend radially outward from the outer circumference 16 of the sprocket body 12. The bicycle sprocket 10 can also include an attachment portion 18 to which the sprocket support 6 is attached. The bicycle sprocket 10 can be mounted to the bicycle hub assembly 4 via a sprocket support 6 . However, the bicycle sprocket 10 can include a hub engagement structure 2 that directly engages the bicycle hub assembly 4 in place of the attachment portion 18.

As seen in Figures 3 and 4, the plurality of sprocket teeth 14 includes at least one first tooth 20 and at least one second tooth 22. The at least one first tooth 20 is detached from the bicycle chain C first in the displacement operation of the bicycle chain C from the bicycle sprocket 10 to the adjacent bicycle sprocket. In the case where the bicycle sprocket 10 is the bicycle sprocket S1, the adjacent bicycle sprocket is the bicycle sprocket S2. The at least one second tooth 22 is disposed at least in the case where the at least one first tooth 20 and the at least one second tooth 22 do not have any teeth in the circumferential direction D1 with respect to the central axis of rotation A1 of the bicycle sprocket 10 A first tooth 20 is adjacent to the at least one first tooth 20 at an upstream side in the driving rotational direction D11 of the bicycle sprocket 10. The plurality of sprocket teeth 14 includes at least one third tooth 24, and the at least one third tooth 24 is disposed without any teeth between the at least one second tooth 22 and the at least one third tooth 24 in the circumferential direction D1. Adjacent to the at least one second tooth 22 at the upstream side of the at least one second tooth 22. In the illustrated embodiment, the plurality of sprocket teeth 14 further includes at least one additional tooth 26 for first shifting with the bicycle in the shifting operation of the bicycle chain C from the bicycle sprocket 10 to adjacent the smaller bicycle sprocket Chain C is detached. The at least one additional tooth 26 is arranged downstream of the at least one first tooth 20 in the drive rotational direction D11 without any tooth between the at least one first tooth 20 and the at least one additional tooth 26 in the circumferential direction D1 The side is adjacent to the at least one first tooth 20. However, at least one additional tooth 26 can be omitted, or at least one additional tooth 26 can have substantially the same features as the features of the at least one third tooth 24.

5 through 7 illustrate enlarged views of at least one first tooth 20, at least one second tooth 22, at least one third tooth 24, and at least one additional tooth 26. As seen in Figures 5-7, at least one second tooth 22 has a drive surface 28, a non-drive surface 30 opposite the drive surface 28 in the circumferential direction D1, and a tooth tip 32 connecting the drive surface 28 and the non-drive surface 30. . The driving surface 28 faces the reverse rotation direction D12 opposite to the driving rotational direction D11. The non-driving surface 30 faces the driving rotational direction D11. Preferably, the tooth tip 32 has a length L shorter than or equal to 1.5 mm in the circumferential direction D1. However, the range of the length L is not limited to this embodiment. The length L can be longer than 1.5 mm. In the illustrated embodiment, the tip 32 is a tip surface having a length L. However, the tip 32 can be the edge that connects the drive surface 28 to the non-drive surface 30. That is, the length L can be zero.

As seen in Figures 5 and 6, at least one second tooth 22 has a first tooth height H1. The first tooth height H1 is a radial length between the tooth tip 32 and the base circle 16 of the bicycle sprocket 10 with respect to the central axis of rotation A1.

Similarly, the at least one third tooth 24 has a drive surface 34, a non-drive surface 36 opposite the drive surface 34 in the circumferential direction D1, and a tooth tip 38 that connects the drive surface 34 and the non-drive surface 36. The drive surface 34 faces in the reverse rotational direction D12. The non-driving surface 36 faces the driving rotational direction D11. In the illustrated embodiment, the tip 38 is the tip surface. However, the tip 38 can be the edge that connects the drive surface 34 to the non-drive surface 36. At least one third tooth 24 has a second tooth height H2. The second tooth height H2 is a radial length between the tooth tip 38 and the base circle 16 of the bicycle sprocket 10 with respect to the central axis of rotation A1. In this embodiment, the second tooth height H2 is longer than the first tooth height H1. Preferably, the first tooth height H1 is at least 1.0 mm longer than the second tooth height H2. More preferably, the first tooth height H1 is 1.1 mm to 1.6 mm longer than the second tooth height H2. However, the difference between the first tooth height H1 and the second tooth height H2 is not limited to this embodiment.

Furthermore, the at least one first tooth 20 has a drive surface 40, a non-drive surface 42 opposite the drive surface 40 in the circumferential direction D1, and a tooth tip 44 connecting the drive surface 40 and the non-drive surface 42. The drive surface 40 faces in the reverse rotation direction D12. The non-driving surface 42 faces the driving rotational direction D11. In the illustrated embodiment, the tip 44 is the tip surface. However, the tip 44 can be the edge that connects the drive surface 40 to the non-drive surface 42. At least one first tooth 20 has a third tooth height H3. The third tooth height H3 is a radial length between the tooth tip 44 and the base circle 16 of the bicycle sprocket 10 with respect to the rotational center axis A1. In this embodiment, preferably, the third tooth height H3 is longer than the first tooth height H1. In the illustrated embodiment, the third tooth height H3 is substantially equal to the second tooth height H2. However, the difference between the third tooth height H3 and the second tooth height H2 is not limited to this embodiment.

Furthermore, at least one additional tooth 26 has a drive surface 46, a non-drive surface 48 opposite the drive surface 46 in the circumferential direction D1, and a tooth tip 50 connecting the drive surface 46 and the non-drive surface 48. The drive surface 46 faces in the reverse rotational direction D12. The non-driving surface 48 faces the driving rotational direction D11. In the illustrated embodiment, the tip 50 is the tip surface. However, the tip 50 can be the edge that connects the drive surface 46 to the non-drive surface 48. At least one additional tooth 26 has a fourth tooth height H4. The fourth tooth height H4 is a radial length between the tooth tip 50 and the base circle 16 of the bicycle sprocket 10 with respect to the rotation center axis A1. In this embodiment, preferably, the fourth tooth height H4 is longer than the first tooth height H1. In the illustrated embodiment, the fourth tooth height H4 is substantially equal to the second tooth height H2. However, the difference between the fourth tooth height H4 and the second tooth height H2 is not limited to this embodiment.

As seen in Figures 5, 7 and 8, at least one first tooth 20 includes a first axially outward recess 52 disposed on an outwardly facing side OFS facing the axial direction D2 to facilitate outward displacement operating. As seen in Figures 5, 7 and 9, at least one first tooth 20 includes a second axially outward recess 54 disposed on the outwardly facing side OFS facing the axial direction D2 to facilitate outward displacement operating. The second axially outward recess 54 is disposed on the first axially outward recess 52 at the upstream side of the first axially outward recess 52 in the drive rotational direction D11. As seen in FIGS. 5, 7, and 10, the second axially outward recess 54 extends from the at least one first tooth 20 to the at least one second tooth 22 and the sprocket body 12. Furthermore, as seen in Figures 5, 7 and 8, the at least one first tooth 20 includes a first outward chamfer 56 that is disposed proximate to the tooth tip 44 of the at least one first tooth 20 on the outwardly facing side OFS. To facilitate the outward shift operation.

As seen in Figures 5, 7 and 11, at least one additional tooth 26 includes a third axially outward recess 58 disposed on the outwardly facing side OFS facing the axial direction D2 to facilitate outward displacement operation . As seen in Figures 6, 7 and 11, the at least one additional tooth 26 includes a first axially inwardly recessed 60 disposed on the inwardly facing side IFS facing the axial direction D2 to facilitate outward displacement operation. . The third axially outward recess 58 and the first axially inward recess 60 are disposed proximate the tip 50 of the at least one additional tooth 26. Moreover, as seen in FIGS. 5, 7, and 10, the at least one second tooth 22 includes a second outward chamfer 62 that is additional to the second axially outward recess 54. The second outward chamfer 62 is disposed on the outwardly facing side OFS facing the axial direction D2 to facilitate the outward shifting operation. The second outward chamfer 62 is disposed proximate the tooth tip 32 of the at least one second tooth 22.

With the bicycle sprocket 10, at least one second tooth 22 has a first tooth height H1 that is shorter than the second tooth height H2. Thus, it is possible to reduce the likelihood of at least one second tooth 22 interfering with the outward displacement movement of the bicycle chain C when the at least one first tooth 20 (or at least one additional tooth 26) is disengaged from the bicycle chain C. Therefore, it is possible to facilitate the outward shift operation. Second embodiment

The bicycle sprocket 110 provided in accordance with the second embodiment will be described below with reference to FIGS. 12 to 14. The bicycle sprocket 110 has substantially the same features as the bicycle sprocket 10 except for the shape of the at least one second tooth 22. Therefore, elements having substantially the same functions as those in the first embodiment will be numbered the same herein, and will not be described and/or illustrated again in detail for the sake of brevity. Moreover, in the second embodiment, the drive surface 40 of the at least one first tooth 20 can be referred to as an additional drive surface 40.

As seen in Figures 12-14, the bicycle sprocket 110 includes at least one second tooth 122. As seen in Figures 12 and 13, at least one second tooth 122 has a first rim height H11 at the drive surface 28 and a second rim height H12 at the non-drive surface 30. The first rim height H11 is a radial length between the uppermost edge P of the drive surface 28 and the base circle 16 of the bicycle sprocket 10 with respect to the central axis of rotation A1. The second tooth edge height H12 is a radial length between the uppermost edge Q of the non-driving surface 30 and the base circle 16 of the bicycle sprocket 10 with respect to the central axis of rotation A1. In the first embodiment, the first tooth edge height H11 is substantially equal to the second tooth edge height H12, and the first tooth edge height H11 and the second tooth edge height H12 are substantially equal to the first tooth height H1. In the second embodiment, the first tooth edge height H11 is at least 0.5 mm longer than the second tooth edge height H12. Although the at least one second tooth 122 has such a shape as seen in FIGS. 12 to 14, the tooth tip 32 has a length L that is shorter than or equal to 1.5 mm.

As seen in Figures 12 and 13, at least one first tooth 20 has an additional drive surface 40 facing the non-driving surface 30 in the circumferential direction D1. The at least one first tooth 20 has a third tooth edge height H13 that is longer than the first tooth edge height H11 at the additional drive surface 40. The third tooth edge height H13 is a radial length between the uppermost edge R of the additional drive surface 40 and the base circle 16 of the bicycle sprocket 10 with respect to the central axis of rotation A1. That is, the third tooth height H13 is substantially equal to the third tooth height H3 described in the first embodiment. Further, the first tooth edge height H11 is shorter than the second tooth height H2. In other words, as in the first embodiment, the second tooth height H2 is longer than the first tooth height H1 in the second embodiment. Similarly, the first tooth edge height H11 is shorter than each of the third tooth height H3 and the fourth tooth height H4 described in the first embodiment. However, at least one of the third tooth edge height H13, the second tooth height H2, the third tooth height H3, and the fourth tooth height H4 may be shorter or substantially equal to the first tooth edge height H11. In this case, each of the third tooth edge height H13, the second tooth height H2, the third tooth height H3, and the fourth tooth height H4 is preferably longer than the second tooth edge height H12.

With the bicycle sprocket 110, the first rim height H11 is at least 0.5 mm longer than the second rim height H12. Therefore, it is possible to provide an advantageous effect substantially the same as the advantageous effect of the bicycle sprocket 10. That is, it is possible to reduce the likelihood that at least one second tooth 122 interferes with the outward displacement movement of the bicycle chain C when the at least one first tooth 20 (or at least one additional tooth 26) is disengaged from the bicycle chain C. Therefore, it is possible to facilitate the outward shift operation.

The term "comprise" and its derivatives are used herein to mean an open term that defines the appearance of the features, components, components, groups, integers, and/or steps, but does not exclude other features that are not stated, The appearance of components, components, groups, integers, and/or steps. This concept is also applied to words having similar meanings, such as the terms "having", "including" and their derivatives.

The terms "member", "section", "section", "part", "element", "body" and "structure" are used in the singular and can be used in the singular.

The ordinal terms such as "first" and "second" as used in the present application are merely distinguishing terms, but do not have any other meaning such as a specific order. Moreover, for example, the term "first element" does not itself imply the presence of "second element", and the term "second element" does not itself imply the presence of "first element."

The term "a pair" as used herein, in addition to encompassing configurations in which the pair of elements have the same shape or configuration, can also encompass configurations in which the elements have different shapes or configurations from one another.

Finally, the terms "substantially", "about" and "approximately" as used herein mean the reasonable amount of variation of the modified term so that the end result does not change significantly.

Obviously, many modifications and variations of the present invention are possible in light of the above teachings. Therefore, it is to be understood that the invention may be practiced otherwise than as specifically described herein.

1‧‧‧Bicycle multi-sprocket assembly

2‧‧·Wheel joint structure

4‧‧‧Bicycle wheel hub assembly

6‧‧‧Sprocket support

10‧‧‧Bicycle sprocket

12‧‧‧Sprocket body

14‧‧‧Sprocket teeth

16‧‧‧Outside, base circle

18‧‧‧ Attachment

20‧‧‧first tooth

22‧‧‧second tooth

24‧‧‧ third tooth

26‧‧‧Additional teeth

28‧‧‧Drive surface

30‧‧‧Non-drive surface

32‧‧‧ tooth tips

34‧‧‧Drive surface

36‧‧‧Non-drive surface

38‧‧‧ tooth tips

40‧‧‧Drive surface, additional drive surface

42‧‧‧Non-drive surface

44‧‧‧ tooth tips

46‧‧‧Drive surface

48‧‧‧Non-drive surface

50‧‧‧ tooth tips

52‧‧‧First axial outward recess

54‧‧‧Second axial outward recess

56‧‧‧First outward chamfer

58‧‧‧ Third axial outward recess

60‧‧‧First axial inward recess

62‧‧‧Second outward chamfering

110‧‧‧Bicycle sprocket

122‧‧‧second tooth

A1‧‧‧Rotation center axis

C‧‧‧Bicycle chain

CP‧‧‧Bicycle Center Plane

D1‧‧‧ circumferential direction

D11‧‧‧ drive rotation direction

D12‧‧‧ Reverse rotation direction

D2‧‧‧ axial direction

D21‧‧‧ outward direction

D22‧‧‧Inward direction

D31‧‧‧ outward shift direction

D32‧‧‧Inward shift direction

H1‧‧‧first tooth height

H11‧‧‧first tooth edge height

H12‧‧‧second tooth height

H13‧‧‧ third tooth edge height

H2‧‧‧second tooth height

H3‧‧‧ third tooth height

H4‧‧‧fourth tooth height

IFS‧‧‧inward facing side

L‧‧‧ length

OFS‧‧‧ outward facing

P‧‧‧The top edge

Q‧‧‧The top edge

R‧‧‧ top edge

RD‧‧‧ rear derailleur

S1‧‧‧Bicycle sprocket

S2‧‧‧Bicycle sprocket

S3‧‧‧Bicycle sprocket

S4‧‧‧Bicycle sprocket

S5‧‧‧Bicycle sprocket

S6‧‧‧Bicycle sprocket

S7‧‧‧Bicycle sprocket

S8‧‧‧Bicycle sprocket

S9‧‧‧Bicycle sprocket

S10‧‧‧Bicycle sprocket

S11‧‧‧Bicycle sprocket

S12‧‧‧Bicycle sprocket

SP1‧‧‧ spacers

SP2‧‧‧ spacers

SP3‧‧‧ spacers

SP4‧‧‧ spacer

SP5‧‧‧ spacers

SP6‧‧‧ spacer

SP7‧‧‧ spacer

SP8‧‧‧ spacers

SP9‧‧‧ spacer

SP10‧‧‧ spacers

SP11‧‧‧ spacers

VIII‧‧‧ hatching

IX‧‧‧ hatching

X‧‧‧ hatching

XI‧‧‧ hatching

A more complete understanding of the present invention, as well as many of its attendant advantages, will become more <RTIgt; Easy to get.

1 is a perspective view of a bicycle multi-sprocket assembly including a bicycle sprocket according to a first embodiment.

2 is a front elevational view of the bicycle multi-sprocket assembly.

3 is a side elevational view of the bicycle sprocket of the bicycle multiple sprocket assembly illustrated in FIG. 1.

4 is another side view of the bicycle sprocket of the bicycle multiple sprocket assembly illustrated in FIG. 1.

Figure 5 is a partial side elevational view of the bicycle sprocket of the bicycle multiple sprocket assembly illustrated in Figure 1.

6 is another partial side view of the bicycle sprocket of the bicycle multiple sprocket assembly illustrated in FIG. 1.

7 is a partial plan view of the bicycle sprocket of the bicycle multiple sprocket assembly illustrated in FIG. 1.

Figure 8 is a cross-sectional view of the bicycle sprocket illustrated in Figures 5 through 7 taken along line VIII-VIII of Figures 5-7.

Figure 9 is a cross-sectional view of the bicycle sprocket illustrated in Figures 5 through 7 taken along line IX-IX of Figures 5-7.

Figure 10 is a cross-sectional view of the bicycle sprocket illustrated in Figures 5 through 7 taken along line X-X of Figures 5-7.

Figure 11 is a cross-sectional view of the bicycle sprocket illustrated in Figures 5 through 7 taken along line XI-XI of Figures 5-7.

Figure 12 is a partial side elevational view of a bicycle sprocket according to a second embodiment.

Figure 13 is another partial side view of the bicycle sprocket illustrated in Figure 12.

Figure 14 is a partial plan view of the bicycle sprocket illustrated in Figure 12.

Claims (9)

A bicycle sprocket comprising: a sprocket body; and a plurality of sprocket teeth disposed on an outer circumference of the sprocket body, the plurality of sprocket teeth comprising: at least one first tooth to be used in the bicycle chain Disengaging the bicycle sprocket from a displacement of the bicycle sprocket adjacent to the bicycle sprocket; at least one second tooth between the at least one first tooth and the at least one second tooth The rotation center axis of the bicycle sprocket is disposed adjacent to the at least one first tooth at an upstream side of the at least one first tooth in a driving rotational direction of the bicycle sprocket without any teeth in a circumferential direction The at least one second tooth has a first tooth height; and at least one third tooth that is between the at least one second tooth and the at least one third tooth without any teeth in the circumferential direction Provided adjacent to the at least one second tooth at the upstream side of the at least one second tooth, the at least one third tooth having a length longer than the first The height of the second tooth height. The bicycle sprocket according to claim 1, wherein the first tooth height is at least 1.0 mm shorter than the second tooth height. The bicycle sprocket of claim 2, wherein the first tooth height is 1.1 mm to 1.6 mm shorter than the second tooth height. The bicycle sprocket of claim 1, wherein the plurality of sprocket teeth further comprises at least one additional tooth to displace the bicycle chain from the bicycle sprocket to the adjacent smaller bicycle sprocket Disengaging from the bicycle chain in the shifting operation, and the at least one additional tooth is disposed at least in the circumferential direction without any teeth between the at least one first tooth and the at least one additional tooth A first tooth is adjacent to the at least one first tooth at a downstream side in the driving rotational direction. The bicycle sprocket according to claim 1, wherein the at least one second tooth has a driving surface, a non-driving surface opposite to the driving surface in the circumferential direction, and a connection between the driving surface and the non-driving surface. a tip of the tooth, and the tip has a length shorter than or equal to 1.5 mm in the circumferential direction. A bicycle sprocket comprising: a sprocket body; and a plurality of sprocket teeth disposed on an outer circumference of the sprocket body, the plurality of sprocket teeth comprising: at least one first tooth configured to be constructed on a bicycle Disengaging the chain from the bicycle sprocket to a displacement operation adjacent to the smaller bicycle sprocket; and at least one second tooth at the at least one first tooth and the at least one second tooth Between the case where there is no tooth in the circumferential direction with respect to the central axis of rotation of the bicycle sprocket, it is disposed adjacent to the at least one upstream side of the at least one first tooth in the driving rotational direction of the bicycle sprocket a first tooth having a drive surface and a non-driving surface opposite the drive surface in the circumferential direction, the at least one second tooth having a first rim height at the drive surface and The non-driving surface has a second rim height that is at least 0.5 mm longer than the second rim height. The bicycle sprocket according to claim 6, wherein the at least one second tooth has a tooth tip connecting the driving surface and the non-driving surface, and the tooth tip has a length shorter than or equal to 1.5 mm in the circumferential direction. length. The bicycle sprocket according to claim 6, wherein the at least one first tooth has an additional driving surface facing the non-driving surface in the circumferential direction, and the at least one first tooth has at the additional driving surface a third tooth edge height that is longer than the first tooth edge height. The bicycle sprocket of claim 6, wherein the plurality of sprocket teeth further includes at least one additional tooth to displace the bicycle chain from the bicycle sprocket to the adjacent smaller bicycle sprocket Disengaging from the bicycle chain in the shifting operation, and the at least one additional tooth is disposed at least in the circumferential direction without any teeth between the at least one first tooth and the at least one additional tooth A first tooth is adjacent to the at least one first tooth at a downstream side in the driving rotational direction.