bicycle brake device

Abstract

bicycle braking device (10) comprising: a friction element (12; 16); a basic element (14; 18), including a hydraulic cylinder (34; 40); a piston (36; 42), movable in the hydraulic cylinder (34; 40) in a direction of movement (D21; D22) to move the friction element (12; 16) towards a rotatable element (4), wherein the piston (36; 42) is / will be provided at least partially in a frame area (46; 92), defined by an outline of the bicycle frame (2) when viewed from the direction of movement (D21; D22), in a mounting state in which the base element (14; 18) is / will be attached to the bicycle frame (2); and a distance adjusting element (88; 134) designed to set a rest position of the friction element (12; 16) with respect to the hydraulic cylinder (34; 40), wherein the distance adjusting element (88; 134) includes an actuating section (89; 135) designed to be actuated by the user to adjust the rest position of the friction element (12; 16), and wherein the actuating section (89; 135) in the mounting state, viewed from the direction of movement (D21, D22), is / will be provided at least partially within and at least partially outside the frame area (46; 92).

Description

[0001] The present invention relates to a bicycle brake device.

[0002] Cycling is becoming an increasingly popular form of recreational activity as well as a means of transportation. Furthermore, cycling has become a very popular competitive sport for both amateurs and professionals. Regardless of the bicycle's use for time management, transportation, or competition, the bicycle industry is constantly improving various bicycle components. One bicycle component that has been extensively redesigned is a bicycle brake device. Bicycle brake devices are known, for example, from DE 10 2011 003 274 A1, DE 10 2014 204 781 A1, EP 2 316 719 A1, and EP 2 543 583 A1. The object of the invention is to provide a bicycle brake device that is improved with regard to adjustment options. This object is achieved with the features of claim 1; preferred embodiments are defined in the dependent claims.

[0003] According to a first aspect of the present invention, a bicycle brake device comprises a friction member, a base member, a piston, and a gap adjusting member. The base member includes a hydraulic cylinder. The piston is movable within the hydraulic cylinder in a moving direction to thereby move the friction member toward a rotatable member. The piston is at least partially provided within a frame portion defined by an outline of the bicycle frame when viewed from the moving direction in the attached state in which the base member is attached to the bicycle frame.The distance adjustment element is configured to adjust a rest position of the friction element with respect to the hydraulic cylinder, wherein the distance adjustment element includes an actuating portion configured to be actuated by the user to adjust the rest position of the friction element, and wherein the actuating portion, in the fastening state, when viewed from the direction of movement, is provided at least partially in and at least partially outside the frame region.

[0004] Preferably, the bicycle brake device is / is designed such that the piston has a central axis which, in the fastening state, is / is arranged in the frame region when viewed from the direction of movement.

[0005] Preferably, the bicycle brake device is / is designed such that the piston in the fastening state is / is provided entirely in the frame area when viewed from the direction of movement.

[0006] Preferably, the bicycle brake device is / is designed such that the piston in the fastening state is / is provided at least partially in an arrangement recess of the bicycle frame.

[0007] Preferably, the bicycle brake device is / is designed such that the piston in the fastening state is / is provided entirely in an interior space of the bicycle frame when viewed from the direction of movement.

[0008] Preferably, the bicycle brake device is / is designed such that the hydraulic cylinder in the fastening state is / is provided at least partially in an arrangement recess of the bicycle frame.

[0009] Preferably, the bicycle brake device is / is designed such that the hydraulic cylinder in the fastening state is / is provided entirely in the interior of the bicycle frame when viewed from the direction of movement.

[0010] Preferably, the bicycle brake device is / is designed such that the hydraulic cylinder in the fastening state is / is provided at least partially between the friction element and the bicycle frame in the direction of movement.

[0011] Preferably, the bicycle brake device is / is designed such that the piston is / is coupled to the friction element without being / are fixed to the friction element.

[0012] Preferably, the bicycle brake device further comprises an intermediate member provided between the piston and the friction member such that the intermediate member moves the friction member in response to a movement of the piston.

[0013] Preferably, the bicycle brake device is / is designed such that the frame area in the fastening state is / is defined by an outline of the front fork of the bicycle frame when viewed from the direction of movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] A full appreciation of the invention and many of the anticipated advantages of the invention will be readily obtained by better understanding the invention by reference to the following detailed description taken in conjunction with the accompanying drawings, in which: Fig. 1 is a rear elevational view of a bicycle frame provided with a bicycle braking device according to a first embodiment; Fig. 2 is a perspective view of the bicycle brake device as shown in Fig. 1 shown; Fig. 3 is a cross-sectional view of the bicycle brake device taken along the line III-III of Fig. 2; Fig. 4 is a side elevational view of the bicycle frame provided with the bicycle braking device as shown in Fig. 1 shown; Fig. 5 is a partial perspective view of the bicycle brake device as shown in Fig. 1 shown; Fig. 6 is a partial cross-sectional view of the bicycle brake device as shown in Fig. 1 shown; Fig. 7 is a partial perspective view of the bicycle brake device as shown in Fig. 1 shown; Fig. Figure 8 is a side elevational view of the bicycle braking device as shown in Fig. 1 shown; Fig. 9 is a cross-sectional view of the bicycle brake device taken along the line IX-IX of Fig. 8; Fig. 10 is a partial perspective view of the bicycle brake device as shown in Fig. 1 shown; Fig. 11 is a partial perspective view of the bicycle brake device as shown in Fig. 1 shown; Fig. 12 is a side elevational view of the bicycle frame provided with the bicycle braking device as shown in Fig. 1 shown; Fig. 13 is a partial perspective view of the bicycle brake device as shown in Fig. 1 shown; Fig. 14 is a partial cross-sectional view of the bicycle brake device as shown in Fig. 1 shown; Fig. 15 is a partial perspective view of the bicycle brake device as shown in Fig. 1 shown; Fig. 16 is a side elevational view of the bicycle braking device as shown in Fig. 1 shown; Fig. 17 is a cross-sectional view of the bicycle brake device taken along the line XVII-XVII of Fig. 16; Fig. 18 is a partial perspective view of the bicycle brake device as shown in Fig. 1 shown; Fig. 19 is a partial perspective view of the bicycle brake device as shown in Fig. 1 shown; Fig. 20 is a partial cross-sectional view of the bicycle brake device as shown in Fig. 1 shown; Fig. 21 is a cross-sectional view of the bicycle brake device as shown in Fig. 1 is shown; Fig. 22 is a rear elevational view of the bicycle frame provided with a bicycle braking device according to a second embodiment; Fig. 23 is a cross-sectional view of the bicycle brake device as shown in Fig. 22 shown; Fig. 24 is a cross-sectional view of the bicycle brake device as shown in Fig. 22 shown; Fig. 25 is a partial perspective view of the bicycle frame provided with the bicycle braking device as shown in the Fig. 22 is shown; Fig. 26 is a partial perspective view of the bicycle frame provided with the bicycle braking device as shown in the Fig. 22 shown; Fig. 27 is a partial perspective view of the bicycle frame provided with the bicycle braking device as shown in Fig. 22 shown; Fig. 28 is a perspective view of the bicycle brake device as shown in Fig. 22 shown; Fig. 29 is a partial cross-sectional view of the bicycle braking device as shown in Fig. 22 shown; Fig. 30 is a side elevational view of the bicycle frame provided with the bicycle braking device as shown in Fig. 22 shown; Fig. 31 is a cross-sectional view of the bicycle brake device as shown in Fig. 22 shown; Fig. 32 is a cross-sectional view of the bicycle brake device as shown in Fig. 22 shown; Fig. 33 is a partial perspective view of the bicycle frame provided with the bicycle braking device as shown in Fig. 22 shown; Fig. 34 is a partial perspective view of the bicycle frame provided with the bicycle braking device as shown in Fig. 22 shown; Fig. 35 is a partial perspective view of the bicycle frame provided with the bicycle braking device as shown in Fig. 22 shown; Fig. 36 is a perspective view of the bicycle brake device as shown in Fig. 22 shown; Fig. 37 is a partial cross-sectional view of the bicycle braking device as shown in Fig. 22 shown; Fig. 38 is a side elevational view of the bicycle frame provided with the bicycle braking device as shown in Fig. 22 shown; Fig. 39 shows a brake operation of the bicycle brake device as in the Fig. 22 shown; Fig. 40 is a rear elevational view of the bicycle frame provided for a bicycle brake device according to a third embodiment; Fig. 41 is a plan view of a part of the bicycle brake device as shown in Fig. 40 shown; Fig. 42 is a side elevational view of the bicycle frame provided with the bicycle braking device as shown in Fig. 40; and Fig. 43 is a partial cross-sectional view of the bicycle brake device as shown in Fig. 40 shown. DESCRIPTION OF THE EMBODIMENTS

[0015] The embodiments will now be described with reference to the accompanying drawings, wherein like reference numerals designate corresponding or identical elements throughout the several drawings. First embodiment

[0016] With initial reference to the Fig. 1, a bicycle brake device 10 according to a first embodiment is configured for mounting on the bicycle frame 2. While the bicycle brake device 10 illustrated in the embodiment is a front brake device, structures of the bicycle brake device 10 may be used in the case of a rear brake device if needed and / or desired.

[0017] The bicycle brake device 10 is mounted on the front fork 3 of the bicycle frame 2 and is configured to exert a braking force on a rotatable member 4, such as a bicycle rotatably mounted on the front fork 3. The rotatable member 4 may also be referred to as the bicycle wheel 4. The bicycle brake device 10 is configured as a bicycle rim brake device in the illustrated embodiment. The structure of the bicycle brake device 10 can be applied to a bicycle disc brake device if needed and / or desired.

[0018] In the present application, the following directional terms "forward," "backward," "left," "right," "across," "upward," and "downward," as well as any other similar directional terms, refer to directions determined based on a user (e.g., a cyclist) sitting on a saddle (not shown) of a bicycle facing toward the handlebars (not shown). Accordingly, these terms, as used to describe the bicycle braking device 10, should be understood with reference to a bicycle equipped with the bicycle braking device 10 being used in an upright riding position on a horizontal surface.

[0019] As in Fig. As can be seen in Figure 1, the bicycle brake device 10 comprises a friction element 12 and a base element 14. The friction element 12 is movable relative to the base element 14 and is slidable relative to a bicycle rim 5 of the bicycle wheel 4. The friction element 12 has a friction surface 15 facing the rotatable element 4. The base element 14 is / will be configured to be attached to the bicycle frame 2.

[0020] As in Fig. As can be seen in Figure 2, the bicycle brake device 10 is / will be provided at least partially in an arrangement recess 6 of the bicycle frame 2 in a fastening state in which the base member 14 is / will be fastened to the bicycle frame 2. When the friction element 12 is at a rest position P11 (see Figure 2). Fig. 1), the bicycle brake device 10 is / will be provided at least partially in the mounting recess 6 in the mounting state. In the illustrated embodiment, the bicycle brake device 10 is / will be provided at least partially in the mounting recess 6 of the bicycle frame 2 in the mounting state.

[0021] As in Fig. 1, the bicycle brake device 10 further comprises an additional friction element 16 and an additional base element 18. The additional friction element 16 may also be referred to as the friction element 16. The additional base element 18 may also be referred to as the base element 18. The additional friction element 16 is movable with respect to the additional base element 18 and is slidable with respect to the bicycle rim 5 of the bicycle wheel 4. The additional friction element 16 is spaced from the friction element 12 in a transverse direction D1 parallel to a rotation axis RA1 of the bicycle wheel 4. The additional friction element 16 has an additional friction surface 19 facing the rotatable element 4. The additional base element 18 is / will be configured to be / will be attached to the bicycle frame 2. The friction element 12 and the additional friction element 16 are symmetrical with respect to a virtual center plane PL1 perpendicular to the rotation axis RA1.The bicycle brake device 10 has a symmetrical structure around the virtual center plane PL1.

[0022] The bicycle brake device 10 further comprises a coupling element 20 configured to couple the base element 14 to the additional base element 18. The additional base element 18 is spaced apart from the base element 14 in the transverse direction D1. In the illustrated embodiment, the coupling element 20 is configured to be attached to the bicycle frame 2. The coupling element 20 includes a first coupling end 22 and a second coupling end 24 opposite the first coupling end 22. The base element 14 is secured to the first coupling end 22 of the coupling element 20. The additional base element 18 is secured to the second coupling end 24 of the coupling element 20. In fact, the base element 14 is attached to the bicycle frame 2 by means of the coupling element 20. The additional base element 18 is / is attached to the bicycle frame 2 by means of the coupling element 20.

[0023] As in Fig. As can be seen in Figure 2, the coupling element 20 has a mounting structure 26 configured to mount the coupling element 20 to the bicycle frame 2. The mounting structure 26 has a mounting opening 28 extending along the mounting axis A1. In the illustrated embodiment, the mounting opening 28 is provided between the first coupling end 22 and the second coupling end 24 in the transverse direction D1. A mounting bolt (not shown) extends through the mounting opening 28. The coupling element 20 is secured to the bicycle frame 2 by means of the mounting structure 26 and the mounting bolt.

[0024] As in Fig. 1, the bicycle brake device 10 includes a connecting structure 30. The connecting structure 30 is configured to couple the friction element 12 to the base member 14, thereby moving the friction element 12 relative to the base member 14 between the rest position P11 and the braking position P12. The bicycle brake device 10 is configured to be actuated by a brake actuating device (not shown). The friction element 12 is disposed at the rest position P11 when the bicycle brake device 10 is not actuated by the brake actuating device.

[0025] The bicycle brake device 10 further comprises an additional connecting structure 32. The additional connecting structure 32 is / will be configured to couple the additional friction element 16 to the additional base member, in order to thereby move the additional friction element 16 with respect to the additional base member 18 between the additional rest position P21 and the additional braking position P22. The additional connecting structure 32 may also be referred to as the connecting structure 32. The additional rest position P21 may also be referred to as the rest position P21. The additional braking position P22 may also be referred to as the braking position P22. The friction element 16 is / will be arranged at the rest position P21 when the bicycle brake device 10 is / is not actuated by means of the brake actuating device.

[0026] As in Fig. As can be seen in Figure 3, the base member 14 includes a hydraulic cylinder or hydraulic cylinder 34. The bicycle brake device 10 comprises a piston 26 movable within the hydraulic cylinder 34 in a direction of movement D21 to thereby move the friction element 12 toward a rotatable member 4. The hydraulic cylinder 34 includes a cylinder bore 38 extending in a direction of movement D21. The piston 36 is movably provided within the cylinder bore 38. The piston 36 has a central axis A21 parallel to the direction of movement D21.

[0027] The additional base element 18 includes an additional hydraulic cylinder or hydraulic cylinder 40. The bicycle brake device 10 comprises an additional piston 41 movable in the additional hydraulic cylinder 40 in an additional movement direction D22, so as to move the additional friction element toward the rotatable element 4. The additional hydraulic cylinder 40 includes an additional cylinder bore 44 extending in the movement direction D22. The additional piston 42 is movably provided in the additional cylinder bore 44. The additional piston 42 has an additional central axis A22 parallel to the additional movement direction D22. The additional hydraulic cylinder 40 may also be referred to as hydraulic cylinder 40. The additional piston 42 may also be referred to as piston 42. The additional central axis A22 may also be referred to as central axis A22.

[0028] As in Fig. 4, the piston 36 is / will be provided at least partially in a frame region 46 which is / will be defined by an outline of the bicycle frame 2 when viewed from the direction of movement D21 (see Fig. 3) in the attached state, in which the base member 14 is / will be attached to the bicycle frame 2. In the illustrated embodiment, the piston 36 is / will be provided entirely in the frame region 46 in the attached state when viewed from the direction of movement D21. However, the piston 36 can be partially provided in the frame region 46 when viewed from the direction of movement D21. In the illustrated embodiment, the frame region 46 is / will be determined by an outline of the front fork 3 of the bicycle frame 2 when viewed from the direction of movement D21 in the attached state. The central axis A21 of the piston 36 is / will be arranged in the frame region 46 when viewed from the direction of movement D21 in the attached state.

[0029] The hydraulic cylinder 34 is / will be provided at least partially in the frame region 46 in the attached state when viewed from the direction of movement D21. In the illustrated embodiment, the hydraulic cylinder 34 is / will be provided entirely in the frame region 46 in the attached state when viewed from the direction of movement D21. However, the hydraulic cylinder 34 can be partially provided in the frame region 46 in the attached state when viewed from the direction of movement D21.

[0030] In the attached state, the base element 14 is / will be provided at least partially in the frame region 46 when viewed from the direction of movement D21. In the illustrated embodiment, in the attached state, the base element 14 is / will be provided entirely in the frame region 46 when viewed from the direction of movement D21. However, in the attached state, the base element 14 can be / will be partially provided in the frame region 46 when viewed from the direction of movement D21.

[0031] As in Fig. 4, the piston 36 is / will be at least partially provided in the arrangement recess 6 of the bicycle frame 2 in the attached state. In the illustrated embodiment, the piston 36 is / will be entirely provided in the arrangement recess 6 of the bicycle frame 2 in the attached state. However, the piston 36 may be partially provided in the arrangement recess 6 of the bicycle frame 2 in the attached state. The piston 36 is / will be entirely provided in an interior space 7 of the bicycle frame 2 in the attached state when viewed from the direction of movement D21. However, the piston 36 may be at least partially provided in the interior space 7 of the bicycle frame 2 in the attached state when viewed from the direction of movement D21. The interior space 7 is / will be defined between a first fork arm or stem 3a and a second fork arm or stem 3b of the front fork 3 and includes an arrangement recess 6.

[0032] The hydraulic cylinder 34 is / will be provided at least partially in the arrangement recess 6 of the bicycle frame 2 in the fastened state. In the illustrated embodiment, the hydraulic cylinder 34 is / will be provided entirely in the arrangement recess 6 of the bicycle frame 2 in the fastened state. However, the hydraulic cylinder 34 can be provided partially in the arrangement recess 6 of the bicycle frame 2 in the fastened state. The hydraulic cylinder 34 is / will be provided entirely in the interior space 7 of the bicycle frame 2 in the fastened state when viewed from the direction of movement D21. However, the hydraulic cylinder 34 can be provided at least partially in the interior space 7 of the bicycle frame 2 in the fastened state when viewed from the direction of movement D21.

[0033] The base element 14 is / will be at least partially provided in the arrangement recess 6 of the bicycle frame 2 in the fastened state. In the illustrated embodiment, the base element 14 is / will be entirely provided in the arrangement recess 6 of the bicycle frame 2 in the fastened state. However, the base element 14 can be partially provided in the arrangement recess 6 of the bicycle frame 2 in the fastened state. The base element 14 is / will be entirely provided in the interior space 7 of the bicycle frame 2 in the fastened state when viewed from the direction of movement D21. However, the base element 14 can be at least partially provided in the interior space 7 of the bicycle frame 2 in the fastened state when viewed from the direction of movement D21.

[0034] As in Fig. 3, the piston 36 is configured to push the connecting structure 30 to move the friction element 12 from the rest position P11 to the braking position P12. As shown in Fig. As can be seen in Figure 5, the connecting structure 30 is configured to pivotally couple the friction element 12 to the base member 14 about a first pivot axis PA11. The connecting structure 30 includes a first connecting element 48 pivotally coupled to the base member about a first pivot axis PA11. The piston 36 is configured to urge the first connecting element 48 to move the friction element 12 from the rest position P11 to the braking position P12.

[0035] As in Fig. As shown in Figure 5, the connecting structure 30 includes a first connecting pin 50 configured to pivotally couple the first connecting element 48 to the base element 14 about the first pivot axis PA11. In the illustrated embodiment, the first connecting pin 50 is configured to pivotally couple the first connecting element 48 to the base element 14 and to the coupling element 20 about the first pivot axis PA11.

[0036] As in Fig. 5, the connecting structure 30 includes a second connecting element 52 pivotally coupled to the first connecting element 48 about the second pivot axis PA12 parallel to the first pivot axis PA11. The first friction element 12 is fixed to the second connecting element 52. The connecting structure 30 includes a second connecting pin 54 for pivotally coupling the second connecting element 52 to the first connecting element 48 about the second pivot axis PA12. The bicycle brake device 10 includes a coupling bolt 56 (see Fig. 6) configured to couple the friction element 12 to the second connecting element 52. The friction element 12, together with the second connecting element 52, is movable with respect to the base element 14.

[0037] As in Fig. 6, the piston 36 is configured to be operatively coupled to the friction element 12. In particular, the first connecting element 48 includes a receiving portion 58 contactable by the piston 36. The piston 36 is configured to press the receiving portion 58 of the first connecting element 48. The piston 36 is coupled to the first connecting element 48 without being fixed to the first connecting element 48. In the illustrated embodiment, the piston 36 is not secured to the first connecting element 48 and is only contactable by the receiving portion 58 of the connecting element. Namely, the piston 36 is coupled to the friction element 12 without being fixed to the friction element 12. The piston 36 is provided between the first pivot axis PA11 and the friction element 12. The piston 36 is / will be provided between the first pivot axis PA11 and the second pivot axis PA12.

[0038] As in Fig. 5, the first connecting member 48 includes a first frame portion 60 which is / is rotatably coupled to the base member 14 about the first pivot axis PA11. The receiving portion 58 is / is secured to the first frame portion 60. The first frame portion 60 is / is pivotally coupled to the base member 14 about the first pivot axis PA11 by means of the first connecting pin 50. The first frame portion 60 is / is pivotally coupled to the second connecting member 52 about the second pivot axis PA12 by means of the second connecting pin 54. The first frame portion 60 extends from the first pivot axis PA11 toward the second pivot axis PA12.

[0039] As in Fig. As seen in Figure 7, the connecting member 48 includes a second frame portion 62 pivotally coupled to the base member 14 about the first pivot axis PA11. The receiving portion 58 is secured to the second frame portion 62. The second frame portion 62 is pivotally coupled to the base member 14 about the first pivot axis PA11 by means of the first connecting pin 50. The second frame portion 62 is pivotally coupled to the second connecting member 52 about the second pivot axis PA12 by means of the second connecting pin 54. The second frame portion 62 extends from the first pivot axis PA11 toward the second pivot axis PA12.

[0040] As in Fig. 6, the bicycle brake device 10 further includes an intermediate member 64 provided between the piston 36 and the friction element 12, such that the intermediate member 64 moves the friction element 12 in response to the movement of the piston 36. In the illustrated embodiment, the intermediate member 64 may also be referred to as one of the first connecting member 48 and the second connecting member 52.

[0041] As in Fig. As can be seen in Figure 8, the first frame section 60 is spaced apart from the second frame section 62 in an axial direction D3 parallel to the first pivot axis PA11. The receiving section 58 is provided between the first frame section 60 and the second frame section 62 in the axial direction D3 and couples the first frame section 60 to the second frame section 62.

[0042] As in Fig. 8, the piston 36 is / will be provided at least partially in a connecting region 66, which is / will be defined by an outline of the first connecting element 48 when viewed from the direction of movement D21. The connecting region 66 is in Fig. 8 is indicated by a thick line. In the illustrated embodiment, the piston 36 is / will be entirely provided within the connecting region 66 when viewed from the direction of movement D21. The central axis A21 is / will be provided within the connecting region 66 when viewed from the direction of movement D21. The connecting region 66 is / will be defined by the receiving portion 58, the first frame portion 60, and the second frame portion 62.

[0043] As in Fig. 9, the friction element 12 is attached to the second connecting element 52 so that an orientation of the friction element 12 relative to the second connecting element 52 is adjustable. In the illustrated embodiment, the friction element 12 includes a brake shoe 68, a shoe attachment member 70, a fastener 71, an adjusting washer 72, and a nut member 74. The brake shoe 68 encloses the friction surface 15 and is attached to the shoe attachment member 70. The shoe attachment member 70 includes a first curved surface 70a that opposes the friction surface 15. The fastener 71 is attached to the shoe attachment member 70 to position the brake shoe 68 relative to the shoe attachment member 70.

[0044] The adjustment washer 72 is provided between the shoe fastening element 70 and the second connecting element 52 and includes a second curved surface 72a. The second curved surface 72a has a complementary shape relative to the first curved surface 70a. In the illustrated embodiment, the first curved surface 70a is a convex surface, and the second curved surface 72a is a concave surface.

[0045] The nut member 74 includes a mounting hole 74a having an internal thread. The coupling bolt 56 is threadably engaged with the mounting hole 74a of the nut member 74. The second connecting member 52 is sandwiched between the adjusting washer 72 and a head portion 56a of the coupling bolt 56. The orientation of the brake shoe 68 is adjustable relative to the second connecting member 52 along the first curved surface 70a and the second curved surface 72a.

[0046] As in Fig. 6 and Fig. 10, the base member 14 is configured to guide the second connecting member 52 to maintain an orientation of the friction surface 15 of the friction element 12 between the rest position P11 and the braking position P12. The base member 14 includes a guide surface 78. The connecting structure 30 includes a guide member 80 mounted to the second connecting member 52. The guide member 80 is rotatably mounted to the second connecting member 52. In the illustrated embodiment, the second connecting member 52 includes a support rod 82. The guide member 80 is rotatably mounted to the support rod 82 about a guide rotation axis A31. The guide member 80 is in contact with the guide surface 79 to maintain an orientation of the friction surface 15 of the friction element 12 between the rest position P11 and the braking position P12.

[0047] As in Fig. 11, the bicycle brake device 10 further includes a first biasing member 84 configured to bias the first link member 48 relative to the base member 14 toward the piston 36. In the illustrated embodiment, the first biasing member 84 is a torsion spring and is mounted to the first link pin 50. The first biasing member 84 includes a first end 84a, a second end 84b, a first coil member 84c, a second coil member 84d, and a first intermediate portion 84e. The first end 84a extends from the first coil member 84c. The second end 84b extends from the second coil member 84d. The first intermediate portion 84e is provided between the first coil member 84c and the second coil member 84d and couples the first coil member 84c to the second coil member 84d. The first connecting pin 50 extends through the first spiral body 84c and the second spiral body 84d.The first end 84a and the second end 84b engage with the receiving portion 58 of the first connecting element 48. The first intermediate portion 84e engages with the coupling element 20.

[0048] As in Fig. 8, Fig. 9 and Fig. 11, the bicycle brake device 10 further includes a second biasing member 86 configured to bias the second link member 52 relative to the first link member 48 along the base member 14. In the illustrated embodiment, the second biasing member 86 is a torsion spring and is mounted to the second link pin 54. The second biasing member 86 includes a third end 86a, a fourth end 86b, a third coil member 86c, a fourth coil member 86d, and a second intermediate portion 86e (see FIG. Fig. 11). The third end 86a extends from the third spiral body 86c. The fourth end 86b extends from the fourth spiral body 86d. The second connecting pin 54 extends through the third spiral body 86c and the fourth spiral body 86d. The third end 86a and the fourth end 86b engage the support rod 82 of the second connecting element 52.

[0049] As in Fig. As shown in Figure 11, the second intermediate portion 86e is provided between the third spiral body 86c and the fourth spiral body 86d and couples the third spiral body 86c and the fourth spiral body 86d. The second intermediate portion 86e engages the receiving portion 58 of the first connecting element 48.

[0050] As in Fig. As can be seen in Figure 10, the bicycle brake device 10 further includes a gap adjustment element 88 configured to adjust the rest position P11 of the friction element 12 relative to the hydraulic cylinder 34. The gap adjustment element 88 includes an actuating portion 89 configured to be actuated by the user to adjust the rest position P11 of the friction element 12. In the illustrated embodiment, the actuating portion 89 has a disc shape so that the actuating portion 89 can be actuated without tools. In other words, the adjustment element 88 is configured as a tool-free adjustment element.

[0051] As in Fig. 10 and Fig. As shown in Figure 11, the distance adjustment member 88 includes an adjustment rod 90 rotatably mounted on the base member 14 about an adjustment rotation axis A41. The adjustment rod 90 includes a first rod end 90a and a second rod end 90b opposite the first rod end 90a along the adjustment rotation axis A41. The actuating portion 89 is provided at the first rod end 90a. The second rod end 90b is in contact with the first connecting member 48. In the illustrated embodiment, the second rod end 90b is in contact with the first frame portion 60 of the first connecting member 48.

[0052] As in Fig. 11, the adjustment rod 90 includes an external thread. The base member 14 includes a threaded hole 14a. The adjustment rod 90 is threadably engaged with the threaded hole 14a by means of the external thread. Rotation of the distance adjustment member 88 relative to the base member 14 moves the distance adjustment member 88 relative to the base member 14 along the adjustment rotation axis A41, changing a position of the first link member 48 relative to the base member 14. This may change the rest position P11 of the friction member 12. The first biasing member 84 is configured to urge the first link member 48 against the second rod end 90b of the adjustment rod 90.

[0053] As in Fig. 4, the actuating section 89 is / will be provided at least partially in the frame region 46 in the attached state when viewed from the direction of movement D21. In the illustrated embodiment, the actuating section 89 is / will be provided at least partially in the frame region 46 in the attached state when viewed from the direction of movement D21. However, the actuating section 89 can be provided entirely in the frame region 46 in the attached state when viewed from the direction of movement D21.

[0054] The adjustment rod 90 is / will be provided at least partially in the frame region 46 in the attached state when viewed from the direction of movement D21. In the illustrated embodiment, the adjustment rod 90 is / will be provided entirely in the frame region 46 in the attached state when viewed from the direction of movement D21. However, the adjustment rod 90 can be provided partially in the frame region 46 or entirely outside the frame region 46 in the attached state when viewed from the direction of movement D21. While the adjustment rotation axis A41 is / will be provided in the frame region 46 in the attached state when viewed from the direction of movement D21, the adjustment rotation axis A41 can be provided outside the frame region 46 in the attached state when viewed from the direction of movement D21.

[0055] As in Fig. 8, the actuating section 89 is / will be provided at least partially in the connecting region 66 in the fastening state when viewed from the direction of movement D21. In the illustrated embodiment, the actuating section 89 is / will be provided at least partially in the connecting region 66 in the fastening state when viewed from the direction of movement D21. However, the actuating section 89 can be provided entirely in the connecting region 66 in the fastening state when viewed from the direction of movement D21.

[0056] The adjustment rod 90 is / will be provided at least partially in the connecting region 66 in the fastened state when viewed from the direction of movement D21. In the illustrated embodiment, the adjustment rod 90 is / will be provided entirely in the connecting region 66 in the fastened state when viewed from the direction of movement D21. However, the adjustment rod 90 can be provided partially in the connecting region 66 in the fastened state or entirely outside the connecting region 66 when viewed from the direction of movement D21. While the adjustment rotation axis A41 is / will be provided in the connecting region 66 in the fastened state when viewed from the direction of movement D21, the adjustment rotation axis A41 can be provided outside the connecting region 66 in the fastened state when viewed from the direction of movement D21.

[0057] As in Fig. 2, the piston 42 is / will be at least partially in a frame area 92, by the outline of the bicycle frame 2 when viewed from the direction of movement D22 (see Fig. 3), provided in the attached state in which the base member 18 is / will be attached to the bicycle frame 2. In the illustrated embodiment, the piston 42 in the attached state is / will be provided entirely in the frame region 92 when viewed from the direction of movement D22. However, the piston 42 can be partially provided in the frame region 92 when viewed from the direction of movement D22. In the illustrated embodiment, the frame region 92 in the attached state is / will be defined by an outline of the front fork 3 of the bicycle frame 2 when viewed from the direction of movement D22. The central axis A22 of the piston 42 in the attached state is / will be arranged in the frame region 92 when viewed from the direction of movement D22.

[0058] The hydraulic cylinder 40 in the attached state is / will be provided at least partially in the frame region 92 when viewed from the direction of movement D22. In the illustrated embodiment, the hydraulic cylinder 40 in the attached state is / will be provided entirely in the frame region 92 when viewed from the direction of movement D22. However, the hydraulic cylinder 40 in the attached state can be / will be provided partially in the frame region 92 when viewed from the direction of movement D22.

[0059] The base element 18 is / will be provided at least partially in the frame region 92 in the attached state when viewed from the direction of movement D22. In the illustrated embodiment, the base element 18 is / will be provided entirely in the frame region 92 in the attached state when viewed from the direction of movement D22. However, the base element 18 can be partially provided in the frame region 92 in the attached state when viewed from the direction of movement D22.

[0060] As in Fig. 12, the piston 42 is / will be provided at least partially in the arrangement recess 6 of the bicycle frame 3 in the fastened state. In the illustrated embodiment, the piston 42 is / will be provided entirely in the arrangement recess 6 of the bicycle frame 2 in the fastened state. However, the piston 42 can be provided partially in the arrangement recess 6 of the bicycle frame 2 in the fastened state. The piston 42 is / will be provided entirely in the interior space 7 of the bicycle frame 2 in the fastened state when viewed from the direction of movement D22. However, the piston 42 can be provided at least partially in the interior space 7 of the bicycle frame 2 in the fastened state when viewed from the direction of movement D22.

[0061] The hydraulic cylinder 40 is / will be provided at least partially in the arrangement recess 6 of the bicycle frame 2 in the attached state. In the illustrated embodiment, the hydraulic cylinder 40 is / will be provided entirely in the arrangement recess 6 of the bicycle frame 2 in the attached state. However, the hydraulic cylinder 40 can be provided partially in the arrangement recess 6 of the bicycle frame 2 in the attached state. The hydraulic cylinder 40 is / will be provided entirely in the interior space 7 of the bicycle frame 2 in the attached state when viewed from the direction of movement D22. However, the hydraulic cylinder 40 can be provided at least partially in the interior space 7 of the bicycle frame 2 in the attached state when viewed from the direction of movement D22.

[0062] The base element 18 is / will be at least partially provided in the arrangement recess 6 of the bicycle frame 2 in the fastened state. In the illustrated embodiment, the base element 18 is / will be entirely provided in the arrangement recess 6 of the bicycle frame 2 in the fastened state. However, the base element 18 can be partially provided in the arrangement recess 6 of the bicycle frame 2 in the fastened state. The base element 18 is / will be entirely provided in the interior space 7 of the bicycle frame 2 in the fastened state when viewed from the direction of movement D22. However, the base element 18 can be at least partially provided in the interior space 7 of the bicycle frame 2 in the fastened state when viewed from the direction of movement D22.

[0063] As in Fig. 3, the additional piston 42 is configured to push the additional connecting structure 32 to move the additional friction element 16 from the additional rest position P21 to the additional braking position P22. As shown in Fig. As can be seen in Figure 13, the connecting structure 32 is configured to pivotally couple the friction element 16 to the base member 18 about a first pivot axis PA21. The connecting structure 32 includes a first connecting element 94 pivotally coupled to the base member 18 about the first pivot axis PA21. The piston 42 is configured to urge the first connecting element 94 to move the friction element 16 from the rest position P21 to the braking position P22.

[0064] As in Fig. As shown in Figure 13, the connecting structure 32 includes a first connecting pin 96 configured to pivotally couple the first connecting element 94 to the base element 18 about the first pivot axis PA21. In the illustrated embodiment, the first connecting pin 96 is configured to pivotally couple the first connecting element 94 to the base element 18 and the coupling element 20 about the first pivot axis PA21.

[0065] As in Fig. 13, the connecting structure 32 includes a second connecting element 98 pivotally coupled to the first connecting element 94 about the second pivot axis PA22 parallel to the first pivot axis PA21. The first friction element 16 is attached to the second connecting element 98. The connecting structure 32 includes a second connecting pin 100 configured to pivotally couple the second connecting element 98 to the first connecting element 94 about the first pivot axis PA22. The bicycle brake device 10 includes a coupling bolt 102 configured to couple the friction element 16 to the second connecting element 98. The friction element 16, together with the second connecting element 98, is movable relative to the base member 18.

[0066] As in Fig. 14, the additional piston 42 is configured to be operatively coupled to the additional friction element 16. In particular, the first connecting element 94 includes a receiving portion 104 contactable by the piston 42. The piston 42 is configured to press the receiving portion 104 of the first connecting element 94. The piston 42 is coupled to the first connecting element 94 without being fixed to the first connecting element 94. In the illustrated embodiment, the piston 42 is not secured to the first connecting element 94 and is only contactable by the receiving portion 104 of the connecting element. Namely, the piston 42 is coupled to the friction element 16 without being fixed to the friction element 16. The piston 42 is provided between the first pivot axis PA21 and the friction element 16. The piston 42 is / will be provided between the first pivot axis PA21 and the second pivot axis PA22.

[0067] As in Fig. 13, the first connecting member 94 includes a first frame portion 106 rotatably coupled to the base member 18 about the first pivot axis PA21. The receiving portion 104 is secured to the first frame portion 106. The first frame portion 106 is pivotally coupled to the base member 18 about the first pivot axis PA21 by means of the first connecting pin 96. The first frame portion 106 is pivotally coupled to the second connecting member 98 about the second pivot axis PA22 by means of the second connecting pin 100. The first frame portion 106 extends from the first pivot axis PA21 to the second pivot axis PA22.

[0068] As in Fig. 15, the connecting member 94 includes a second frame portion 108 pivotally coupled to the base member 18 about the first pivot axis PA21. The frame portion 104 is secured to the second frame portion 108. The second frame portion 108 is pivotally coupled to the base member 18 about the first pivot axis PA21 by means of the first connecting pin 96. The second frame portion 108 is pivotally coupled to the second connecting member 98 about the second pivot axis PA22 by means of the second connecting pin 54. The second frame portion 108 extends from the first pivot axis PA21 to the second pivot axis PA22.

[0069] As in Fig. 14, the bicycle brake device 10 further includes an intermediate member 110 provided between the piston 42 and the friction element 16, such that the intermediate member 110 moves the friction element 16 in response to movement of the piston 42. In the illustrated embodiment, the intermediate member 110 may also be referred to as at least one of the first connecting member 94 and the second connecting member 98.

[0070] As in Fig. As can be seen in Figure 16, the first frame section 106 is spaced apart from the second frame section 108 along the pivot axis D3 parallel to the first pivot axis PA21. The receiving section 104 is provided between the first frame section 106 and the second frame section 108 in the axial direction D3 and couples the first frame section 106 to the second frame section 108.

[0071] As in Fig. 16, the piston 42 is / will be provided at least partially in a connecting region 112, which defines an outline of the first connecting element 94 when viewed from the direction of movement D22. The connecting region 112 is in Fig. 16 is indicated by a thick line. In the illustrated embodiment, the piston 42 is / will be entirely provided within the connecting region 112 when viewed from the direction of movement D22. The central axis A22 is / will be provided within the connecting region 112 when viewed from the direction of movement D22. The connecting region 112 is / will be defined by the receiving portion 104, the first frame portion 106, and the second frame portion 108.

[0072] As in Fig. 17, the friction element 16 is attached to the second connecting element 98 such that an orientation of the friction element 16 is adjustable with respect to the second connecting element 98. In the illustrated embodiment, the friction element 16 includes a brake shoe 114, a shoe attachment member 116, a fastener 117, an adjusting washer 118, and a nut member 120. The brake shoe 114 includes the friction surface 19 and is attached to the shoe attachment member 116. The shoe attachment member 116 includes a first curved surface 116a that opposes the friction surface 15. The fastener 117 is attached to the shoe attachment member 116 to position the brake shoe 114 with respect to the shoe attachment member 116.

[0073] The adjustment washer 118 is provided between the shoe fastening element 116 and the second connecting element 98 and includes a second curved surface 118a. The second curved surface 118a has a complementary shape relative to the first curved surface 116a. In the illustrated embodiment, the first curved surface 116a is a convex surface, and the second curved surface 118a is a concave surface.

[0074] The nut member 120 includes a mounting hole 120a having an internal thread. The coupling bolt 102 is threadably engaged with the mounting hole 120a of the nut member 120. The second connecting member 98 is sandwiched between the adjusting washer 118 and a head portion 102a of the coupling bolt 102. The orientation of the brake shoe 114 is adjustable relative to the second connecting member 98 along the first curved surface 116a and the second curved surface 118a.

[0075] As in Fig. 14 and Fig. 18, the base member 18 is configured to guide the second connecting member 98 to maintain an orientation of the friction surface 15 of the friction member 16 between the rest position P21 and the braking position P22. The base member 18 includes a guide surface 124. The connecting structure 32 includes a guide member 126 mounted to the second connecting member 98. The guide member 126 is rotatably mounted to the second connecting member 98. In the illustrated embodiment, the second connecting member 98 includes a support rod 128. The guide member 126 is rotatably mounted to the support rod 128 about a guide rotation axis A32. The guide element 126 is in contact with the guide surface 124 to maintain an orientation of the friction surface 15 of the friction element 16 between the rest position P21 and the braking position P22.

[0076] As in Fig. 19, the bicycle brake device 10 further includes a first biasing member 130 configured to bias the first connecting member 94 relative to the base member 18 toward the piston 42. In the illustrated embodiment, the first biasing member 130 is a torsion spring and is mounted on the first connecting pin 96. The first biasing member 130 includes a first end 130a, a second end 130b, a first coil member 130c, a second coil member 130d, and a first intermediate portion 130e. The first end 130a extends from the first coil member 130c. The second end 130b extends from the second coil member 130d. The first intermediate portion 130e is provided between the first spiral body 130c and the second spiral body 130d and couples the first spiral body 130c to the second spiral body 130d. The first connecting pin 96 extends through the first spiral body 130c and the second spiral body 130d.The first end 130a and the second end 130b engage with the receiving portion 104 of the first connecting element 94. The first intermediate portion 130e engages with the coupling element 20.

[0077] As in Fig. 16, Fig. 17 and Fig. 19, the bicycle brake device 10 further includes a second biasing member 132 configured to bias the second link member 98 relative to the first link member 94 along the base member 18. In the illustrated embodiment, the second biasing member 132 is a torsion spring and is mounted to the second link pin 100. The second biasing member 132 includes a third end 132a, a fourth end 132b, a third coil member 132c, a fourth coil member 132d, and a second intermediate portion 132e (see FIG. Fig. 19). The third end 132a extends from the third spiral body 132c. The fourth end 132b extends from the fourth spiral body 132d. The second connecting pin 100 extends through the third spiral body 132c and the fourth spiral body 132d. The third end 132a and the fourth end 132b engage the support rod 128 of the second connecting element 98.

[0078] As in Fig. As shown in Figure 19, the second intermediate portion 132e is provided between the third spiral body 132c and the fourth spiral body 132d and couples the third spiral body 132c and the fourth spiral body 132d. The second intermediate portion 132e engages the receiving portion 104 of the first connecting element 94.

[0079] As in Fig. As shown in Figure 18, the bicycle brake device 10 further includes a gap adjustment element 134 configured to adjust the rest position P21 of the friction element 16 relative to the hydraulic cylinder 40. The gap adjustment element 134 includes an actuating portion 135 configured to be actuated by the user to adjust the rest position P21 of the friction element 16. In the illustrated embodiment, the actuating portion 135 has a disc shape such that the actuating portion 135 can be actuated without tools. In other words, the adjustment element 134 is configured as a tool-free adjustment element.

[0080] As in Fig. 18 and Fig. As shown in Figure 19, the distance adjustment member 134 includes an adjustment rod 136 rotatably mounted on the base member 18 about an adjustment rotation axis A42. The adjustment rod 136 includes a first rod end 136a and a second rod end 136b opposite the first rod end 136a along the adjustment rotation axis A42. The actuating portion 135 is provided at the first rod end 136a. The second rod end 136b is in contact with the first connecting member 94. In the illustrated embodiment, the second rod end 136b is in contact with the first frame portion 106 of the first connecting member 94.

[0081] As in Fig. 19, the adjustment rod 136 includes an external thread. The base member 18 includes a threaded hole 18a. The adjustment rod 136 is threadably engaged with the threaded hole 18a by means of the external thread. Rotation of the distance adjustment member 134 relative to the base member 18 moves the distance adjustment member 134 relative to the base member 18 along the adjustment rotation axis A42, such that a position of the first link member 94 relative to the base member 18 changes. This may change the rest position P21 of the friction member 16. The first biasing member 130 is configured to urge the first link member 94 against the second rod end 136b of the adjustment rod 136.

[0082] As in Fig. 12, the actuating portion 135 is / will be provided at least partially in the frame region 92 in the attached state when viewed from the direction of movement D22. In the illustrated embodiment, the actuating portion 135 is / will be provided at least partially in the frame region 92 in the attached state when viewed from the direction of movement D22. However, the actuating portion 135 can be provided entirely in the frame region 92 in the attached state when viewed from the direction of movement D22.

[0083] The adjustment rod 136 is / will be provided at least partially in the frame region 92 in the attached state when viewed from the direction of movement D22. In the illustrated embodiment, the adjustment rod 136 is / will be provided entirely in the frame region 92 in the attached state when viewed from the direction of movement D22. However, the actuating section 135 can be provided partially in the frame region 92 in the attached state or entirely outside the frame region 92 when viewed from the direction of movement D22. While the adjustment rotation axis A42 is / will be provided in the frame region 92 in the attached state when viewed from the direction of movement D22, the adjustment rotation axis A42 can be provided outside the frame region 92 in the attached state when viewed from the direction of movement D22.

[0084] As in Fig. 16, the actuating portion 135 is / will be provided at least partially in the connecting region 112 in the fastening state when viewed from the direction of movement D22. In the illustrated embodiment, the actuating portion 135 is / will be provided at least partially in the connecting region 112 in the fastening state when viewed from the direction of movement D22. However, the actuating portion 135 can be provided entirely in the connecting region 112 in the fastening state when viewed from the direction of movement D22.

[0085] The adjustment rod 136 is / will be provided at least partially in the connection area 112 in the fastening state when viewed from the direction of movement D22. In the illustrated embodiment, the adjustment rod 136 is / will be provided entirely in the connection area 112 in the fastening state when viewed from the direction of movement D22. However, the actuating section 135 can be provided partially in the connection area 112 in the fastening state or entirely outside the connection area 112 when viewed from the direction of movement D22. While the adjustment rotation axis A42 is / will be provided in the connection area 112 in the fastening state when viewed from the direction of movement D22, the adjustment rotation axis A42 can be provided outside the connection area 112 in the fastening state when viewed from the direction of movement D22.

[0086] As in Fig. As seen in Figure 20, the hydraulic cylinder 34 includes a fluid passage 138 connected to a hydraulic chamber 140 defined by the hydraulic cylinder 34 and the piston 36. The additional hydraulic cylinder 40 includes an additional fluid passage 142 connected to an additional hydraulic chamber 144 defined by the additional hydraulic cylinder 40 and the piston 42. The coupling element 20 includes an intermediate fluid passage 146 configured to connect the fluid passage 138 to the additional fluid passage 142.

[0087] In the illustrated embodiment, the intermediate fluid passage 146 includes an inlet passage 148, a first connecting passage 150, and a second connecting passage 152. The first connecting passage 150 connects the inlet passage 148 to the fluid passage 138 of the base member 14. The second connecting passage 152 connects the inlet passage 148 to the additional fluid passage 142 of the base member 18.

[0088] As in Fig. 21, the intermediate fluid passage 146 extends at least partially in a mounting direction D4 parallel to the mounting axis A1. In the illustrated embodiment, the inlet passage 148 extends in the mounting direction D4. As shown in Fig. 11, the mounting axis A1 is parallel to the first pivot axis PA11 and the second pivot axis PA12. As shown in Fig. As can be seen in Figure 19, the mounting axis A1 is parallel to the first pivot axis PA21 and the second pivot axis PA22. The coupling element 20 includes a main body 20a and a connecting tube 20b extending from the main body 20a in the mounting direction D4. The inlet passage 148 is / will be partially provided in the connecting tube 20b.

[0089] In other words, as in Fig. 20, the bicycle brake device 10 includes a base structure 154. The base structure 154 includes the hydraulic cylinder 34, the additional hydraulic cylinder 40, and an internal fluid passage 156. As shown in Fig. 20 and Fig. As can be seen in Figure 21, the internal fluid passage 156 includes a single inlet port 156a, an outlet port 156b, and an additional outlet port 156c. The outlet port 156b is connected to the hydraulic cylinder 34. The outlet port 156c is connected to the additional hydraulic cylinder 40. A ring piece 8 is connected to the inlet port 156a by means of a ring piece fastening bolt 9.

[0090] If, as in Fig. 20 and Fig. 21, when a brake operating device (not shown) is operated by a user, hydraulic pressure is transmitted from a master cylinder (not shown) of the brake operating device to the hydraulic chamber 140 and the additional hydraulic chamber 144 via the intermediate fluid passage 146 of the coupling element 20.

[0091] As in Fig. 6, the hydraulic pressure moves the piston 36 with respect to the base member 14 toward the receiving portion 58 of the connecting structure 30 in the direction of movement D21 against the biasing force of the first biasing member 84. This moves the piston 36 with respect to the base member 14 from the rest position P11 toward the braking position P12.

[0092] As in Fig. 14, the hydraulic pressure similarly moves the piston 42 relative to the base member 18 toward the receiving portion 104 of the connecting structure 32 in the direction of movement D22 against the biasing force of the first biasing member 130. This moves the piston 42 relative to the base member 18 from the rest position P21 toward the braking position P22. Therefore, the bicycle rim 5 is sandwiched between the friction elements 12 and 16, with the braking force of each of the friction elements 12 and 16 being applied to the bicycle rim 5 of the bicycle.

[0093] Since the guide element 80 is guided along the guide surface 78 of the base element 14, the orientation of the braking element 12 is maintained as the braking element 12 moves from the rest position P11 to the braking position P12. Similarly, since the guide element 126 is guided along the guide surface 124 of the base element 18, the orientation of the braking element 12 is maintained as the braking element 12 moves from the rest position P21 to the braking position P22.

[0094] In the case of the bicycle brake device 10, as in Fig. 4, the piston 36 is provided at least partially in the frame region 46, defined by the outline of the bicycle frame 2 when viewed from the direction of movement D21, in the fastening state in which the base element 14 is / will be fastened to the bicycle frame 2. Accordingly, it is possible to make the bicycle brake device 10 more compact.

[0095] As in Fig. As can be seen in Figure 12, the piston 42 is / will be provided at least partially in the frame region 92, defined by the outline of the bicycle frame 2 when viewed from the direction of movement D22, in the fastening state in which the base element 18 is / will be fastened to the bicycle frame 2. Accordingly, it is possible to make the bicycle brake device 10 more compact. Second embodiment

[0096] A bicycle brake device 210 according to a second embodiment will be described below with reference to the Fig. 22 to 39. Elements having substantially the same function as those in the first embodiment are designated by the same reference numerals and will not be described and / or illustrated in detail here for the sake of brevity.

[0097] With initial reference to the Fig. 22, the bicycle brake device 210 according to a second embodiment is configured for mounting on a bicycle frame 202. In the illustrated embodiment, the bicycle brake device 210 includes a first brake unit BU1 and a second brake unit BU2. While the first brake unit BU1 is separate from the second brake unit BU2 in the illustrated embodiment, the first brake unit BU1 and the second brake unit BU2 are provided integrally with each other if needed and / or desired. While in the illustrated embodiment, the bicycle brake device 210 is a front brake device, structures of the bicycle brake device 210 can be used in the case of a rear brake device if needed and / or desired.

[0098] The bicycle brake device 210 is mounted on the front fork 203 of the bicycle frame 202 and is configured to apply a braking force to the rotatable member 204, such as a bicycle wheel, which is rotatably attached to the front fork 203. The rotatable member 204 may also be referred to as the bicycle wheel 204. The bicycle brake device 210 is configured as a bicycle rim brake device in the illustrated embodiment. The structure of the bicycle brake device 210 can be applied to a bicycle disc brake device if needed and / or desired.

[0099] As in Fig. As shown in Figure 22, the bicycle brake device 210 includes a friction element 212. The friction element 212 is configured to face a bicycle rim 205 of the bicycle wheel 204. The friction element 212 is slidable with the bicycle rim 205 of the bicycle wheel 204. The friction element 212 has a friction surface 213 facing the rotatable member 204. The friction element 212 is provided between the bicycle rim 205 and the bicycle frame 202. In the illustrated embodiment, the front fork 203 includes a first fork arm 203a and a second fork arm 203b. The friction element 212 is provided between the bicycle rim 205 and the first fork arm 203a. The friction element 212 is / will be provided at least partially in a recess 202a of the bicycle frame 202.

[0100] As in Fig. As shown in Figure 22, the bicycle brake device 210 includes a friction element 214. The friction element 214 is configured to face the bicycle rim 205. The friction element 214 is slidable with the bicycle rim 205 of the bicycle wheel 204. The friction element 214 has a friction surface 215 facing the rotatable member 204. The friction element 214 is spaced from the friction element 212 in a transverse direction D201 parallel to a rotational axis RA2 of the bicycle wheel 204. The friction element 214 is provided between the bicycle rim 205 of the bicycle wheel 204 and the bicycle frame 202. In the illustrated embodiment, the friction element 214 is / will be provided between the bicycle rim 205 and the second fork arm 203b. The friction element 214 is / will be provided at least partially in a recess 202b of the bicycle frame 202.

[0101] The friction element 212 and the friction element 214 are symmetrical with respect to the virtual center plane PL2 perpendicular to the rotation axis RA2. The bicycle brake device 210 has a symmetrical structure with respect to the virtual center plane PL2.

[0102] As in Fig. As seen in Figure 22, the bicycle brake device 210 includes a pressing structure 216. The pressing structure 216 is configured to press the friction element 212 against the bicycle rim 205 of the bicycle wheel 204. The pressing structure 216 is mounted to the bicycle frame 202. In the illustrated embodiment, the pressing structure 216 is mounted to the first fork arm 203a of the front fork 203. In particular, the pressing structure 216 includes a base member 218. The base member 218 is configured to be attached to the bicycle frame 202. In the illustrated embodiment, the base member 218 is configured to be attached to the front fork 203 (e.g., the first fork arm 203a) of the bicycle frame 202.

[0103] As in Fig. As seen in Figure 22, the bicycle brake device 210 includes a pressing structure 220. The pressing structure 220 is configured to press the friction element 212 against the bicycle rim 205 of the bicycle wheel 204. The pressing structure 220 is mounted to the bicycle frame 202. In the illustrated embodiment, the pressing structure 220 is mounted to the first fork arm 203a of the front fork 203. In particular, the pressing structure 220 includes a base member 222. The base member 222 is configured to be attached to the bicycle frame 202. In the illustrated embodiment, the base member 222 is configured to be attached to the front fork 203 (e.g., the second fork arm 203b) of the bicycle frame 202.

[0104] As in Fig. As seen in Figure 23, the friction element 212 includes the first portion 212, an upstream or drive-side portion 224 and a downstream or driven-side portion 226. The downstream portion 226 opposes the upstream portion 224 in a drive rotational motion D202 in which the bicycle rim 205 rotates as the bicycle moves forward.

[0105] In the illustrated embodiment, the upstream portion 224 is an upstream half portion of the friction element 212, and the downstream portion 226 is a downstream half portion of the friction element 212.

[0106] As in Fig. As can be seen in Figure 23, the pressing structure 216 is configured to exert a first pressing force F11 on the downstream portion 226. The pressing structure 216 is configured to exert a second pressing force F12 on the upstream portion 224. The pressing structure 216 is configured to press the friction element 212 against the rotatable element 204 such that the first pressing force F11 is greater than the second pressing force F12.

[0107] As in Fig. As shown in Figure 23, the base member 218 includes a first hydraulic cylinder 228 and a second hydraulic cylinder 230. Specifically, the bicycle brake device 210 includes the base member 218. The first hydraulic cylinder 228 may also be referred to as the hydraulic cylinder 228. The second hydraulic cylinder 230 may also be referred to as the hydraulic cylinder 230. The base member 218 includes the hydraulic cylinder 228 and the hydraulic cylinder 230.

[0108] The pressing structure 216 includes a first piston 232 and a piston 234. The first piston 232 may also be referred to as the piston 232. The second piston 234 may also be referred to as the piston 234. Specifically, the bicycle brake device 210 includes the piston 232 and the piston 234. The pressing structure 216 is configured to exert a first pressing force F11 on the downstream portion 226 by means of the first piston 232. The pressing structure 216 is configured to exert the second pressing force F12 on the upstream portion 224 by means of the second piston 234.

[0109] As in Fig. As can be seen in Figure 23, the first piston 232 is movable within the first hydraulic cylinder 228 and is located closer to the downstream portion 226 than to the upstream portion 224. The first piston 232 is provided to push the downstream portion 226 toward the rotatable member 204. The piston 232 is movable within the hydraulic cylinder 228 in a direction of movement D211 to move the friction element 212 toward the rotatable member 204. The first hydraulic cylinder 228 closes a first cylinder bore 236 extending in the direction of movement D211. The first piston 232 is provided to be movable within the first cylinder bore 236.

[0110] The second piston 234 is movable within the second hydraulic cylinder 230 and is located closer to the downstream section 224 than to the upstream section 226. The second piston 234 is provided to push the upstream section 224 toward the rotatable element 204. The piston 234 is movable within the hydraulic cylinder 230 in a direction of movement D212 to move the friction element 212 toward the rotatable element 204. The second hydraulic cylinder 230 closes a second cylinder bore 238 extending in the direction of movement D212. The second piston 234 is provided to be movable within the second cylinder bore 238.

[0111] As in Fig. As shown in Figure 23, the bicycle brake device 210 includes a support member 240. The support member 240 is rotatably mounted on the base member 218. The support member 240 is coupled to the friction member 212 to movably support the friction member 212 with respect to the base member 218. The support member 240 is provided between the first piston 232 and the second piston 234.

[0112] As in Fig. 23, the support member 240 is movable relative to the base member 218 in a movement direction D213 parallel to the support center axis A213. In particular, the base member 218 includes a support hole 241. The support member 240 is movably provided in the support hole 241. The base member 218 is configured to prevent rotation of the support member 240 relative to the base member 218. For example, the support hole 241 includes a guide groove (not shown). The support member 240 includes a follower (not shown) provided in the guide groove. The guide groove and the follower allow the support member 240 to move relative to the base member 218 in the movement direction while preventing rotation of the support member 240 relative to the base member 218.

[0113] The first piston 232 includes a first central axis A211. The second piston 234 includes a second central axis A212 parallel to the first central axis A211. The first central axis A211 may also be referred to as the central axis A211. The second central axis A212 may also be referred to as the central axis A212. The support element 240 includes a support central axis A213 parallel to the first and second central axes A211 and A212. A first distance L11 between the first central axis A211 and the support central axis A213 is different from the second distance L12 between the second central axis A212 and the support central axis A213. The first distance L11 is longer than the second distance L12. The first central axis A211, the second central axis A212, and the support central axis A213 may be substantially parallel to one another.

[0114] The upstream portion 224 includes an upstream end 224a. The downstream portion 226 includes a downstream end 224b, opposite the upstream end 224a in the drive rotation direction D202. A third distance L13 between the first piston 232 and the downstream end 224b is different from a fourth distance L14 between the second piston 234 and the upstream end 224a. In the illustrated embodiment, the third distance L13 is shorter than the fourth distance L14.

[0115] As in Fig. As can be seen in Figure 23, the piston 232 is / will be coupled to the friction element 212 without being fixed to the friction element 212. The first piston 232 is / will be configured to push the friction element 212 toward the rotatable element 204 without being fixed to the friction element 212. The first piston 232 is in contact with the friction element 212. The piston 234 is / will be coupled to the friction element 212 without being fixed to the friction element 212. The second piston 234 is / will be configured to push the friction element 212 toward the rotatable element 204 without being fixed to the friction element 212. The second piston 234 is in contact with the friction element 212.

[0116] The downstream portion 226 includes a first receiving surface 226b. The first piston 232 includes a first contact surface 232a contactable with the first receiving surface 226b of the downstream portion 226. The first contact surface 232a contacts the first receiving surface 226b when the first piston 232 pushes the downstream portion 226. The first upstream portion 224 includes a second contact surface 224b. The second piston 234 includes a second contact surface 234a contactable with the first receiving surface 226b of the downstream portion 226. The second contact surface 234a contacts the second receiving surface 224b when the second piston 234 pushes the upstream portion 224.

[0117] As in Fig. As shown in Figure 24, the first piston 232 has a first diameter DM11. The second piston 234 has a second diameter DM12, which is different from the first diameter DM11. In the illustrated embodiment, the first diameter DM11 is larger than the second diameter DM12. However, the first diameter DM11 may be equal to or smaller than the second diameter DM12, if needed and / or desired.

[0118] In the illustrated embodiment, the first distance L11 is different from the second distance L12, and the first diameter DM11 is different from the second diameter DM12. However, the first distance L11 may be equal to the second distance L12 if the first diameter DM11 is different from the second diameter DM12. Furthermore, the first diameter DM11 may be equal to the second diameter DM12 if the first distance L11 is different from the second distance L12.

[0119] As in Fig. 23, a hydraulic chamber 242 is defined by the first hydraulic cylinder 228 and the first piston 232. A second hydraulic chamber 244 is defined by the second hydraulic cylinder 230 and the second piston 234. As shown in Fig. 24, the base member 218 includes a connecting fluid passage 246 that connects the first hydraulic chamber 242 to the second hydraulic chamber 244. One end of the connecting fluid passage 246 is plugged with an end plug. The base member 218 includes an inlet port 248. In the illustrated embodiment, the inlet port 248 is connected to the second hydraulic chamber 244. The base member 218 includes a first drain port 250 and a second drain port 252. The drain port 250 is connected to the additional hydraulic chamber 242 (see FIG. Fig. 23). The second drain port 250 is / will be connected to the second hydraulic chamber 244 (see Fig. 23). For example, a drain nipple (not shown) is / is secured into each of the first drain port 250 and the second drain port 252.

[0120] A pressure which is fed or supplied to the first hydraulic chamber 242 (see Fig. 23), is substantially equal to a pressure which is fed or supplied to the second hydraulic chamber 244 (see Fig. 23). Since the first diameter DM11 is larger than the second diameter DM12 (see Fig. 24), the first pressing force F11 is greater than the second pressing force F12 (s Fig. 23). For example, the first pressing force F11 is set in the range of approximately 150% to approximately 200% of the second pressing force F12. The first and second distances L11 and L12 and / or the first and second diameters DM11 and DM12 of the first and second pistons 232 and 234 are set such that the first pressing force F11 is within a range of approximately 150% to approximately 200% of the second pressing force F12.

[0121] As in Fig. As can be seen in Figure 25, the first piston 232 is / will be provided at least partially in a first recess 202c of the bicycle frame 202. The first hydraulic cylinder 228 is / will be provided at least partially in a first recess 202c of the bicycle frame 202. In the illustrated embodiment, the piston 232 is / will be partially provided in the recess 202c of the bicycle frame 202. The first hydraulic cylinder 228 is / will be partially provided in a first recess 202c of the bicycle frame 202. The first recess 202c is / will be provided in a front surface 203c of the first fork arm 203a of the front fork 3 and extends in the direction of movement D211 of the first piston 232.

[0122] As in Fig. As can be seen in Figure 26, the second piston 234 is / will be at least partially provided in a second recess 202d of the bicycle frame 202. The second hydraulic cylinder 230 is / will be at least partially provided in a second recess 202d of the bicycle frame 202. In the illustrated embodiment, the second piston 234 is / will be partially provided in the second recess 202d of the bicycle frame 202. The second hydraulic cylinder 230 is / will be partially provided in a second recess 202d of the bicycle frame 202. The second recess 202d is / will be provided on a rear surface 203d of the first fork arm 203a of the front fork 3 and extends in the direction of movement D212 of the first piston 234.

[0123] As in Fig. As shown in Figure 23, the bicycle brake device 210 further includes a gap adjustment element 254 configured to adjust a rest position P211 of the friction element 212 relative to the hydraulic cylinder 228. The gap adjustment element 254 is configured to adjust a relative position between the support element 240 and the base element 218. The support element 240 includes a second threaded hole 240a. The gap adjustment element 254 is rotatable relative to the base element 218. In the illustrated embodiment, the gap adjustment element 254 is rotatable relative to the base element 218 and the support element 240 about the support rotation axis A213. The gap adjustment element 254 includes a threaded bolt 256.The threaded bolt 256 is threadedly provided in the threaded hole 240a so that rotation of the distance adjusting member 254 with respect to the base member 218 changes the relative position between the support member 240 and the base member 218.

[0124] The distance adjustment element 254 includes an actuating portion 258 configured to be actuated by the user to adjust the rest position P11 of the friction element 212. In the illustrated embodiment, the actuating portion 258 has a disc shape such that the actuating portion 258 can be actuated without tools. In other words, the adjustment element 254 is configured as a tool-free adjustment element. The threaded bolt 256 includes a first end 256a and a second end 256b opposite the first end 256a. The actuating portion 258 is provided at the first end 256a of the threaded bolt 256.

[0125] As in Fig. As seen in Figure 23, the bicycle brake device 210 further includes an adjustment biasing member 260 configured to bias the friction member 212 from the braking position P212 toward the rest position P211 by means of the distance adjusting member 254 and the support member 240. In the illustrated embodiment, the adjustment biasing member 260 is provided between the base member 218 and the actuating portion 258 of the distance adjusting member 254. The adjustment biasing member 260 is configured to bias the distance adjusting member 254 so that the actuating portion 258 moves away from the base member 218. The distance adjusting member 254 includes a flange 262 contactable with the base member 218. The flange 262 extends radially from the threaded bolt 256 and is provided in the support hole 241. The base member 218 includes a stopper 264 which is contactable with the flange 262.The flange 262 is pressed against the stopper 264 by a preload force of the adjusting preload element 254. This can position the friction element 212 at the rest position P211.

[0126] As in Fig. 27, the base member 218 includes a securing portion 266 configured to be attached to the bicycle frame 202 such that an orientation of the friction member 212 is adjustable relative to the bicycle frame 202. In the illustrated embodiment, the securing portion 266 includes a first securing part 268 and a second securing part 270. The first securing part 268 is mounted to the base member 218 and extends from the base member 218. The second securing part 270 is mounted to the base member 218 and extends from the base member 218. The second securing part 270 opposes the first securing part 268.

[0127] The bicycle brake device 210 further includes a first adjustment bolt 272 and a second adjustment bolt 274. The first adjustment bolt 272 is configured to couple the first securing part 268 to the bicycle frame 202. The second adjustment bolt 274 is configured to couple the second securing part 270 to the bicycle frame 202.

[0128] As in Fig. As can be seen in Figure 23, a first distance CL11 is defined between the downstream portion 226 and the rotatable member 204 in a rest state, wherein the friction element 212 is disposed without being pressed by the push structure 216. A second distance CL12 is defined between the upstream portion 224 and the rotatable member 204 in the rest state. In the illustrated embodiment, the friction element 212 is disposed at the rest position P211 in the rest state.

[0129] As in Fig. 28, the securing portion 266 includes a curved surface contactable with the bicycle frame 202 such that at least one of the first distance CL11 and the second distance CL12 is changed. In the illustrated embodiment, the first securing portion 268 includes a first curved surface 268a contactable with the bicycle frame 202 such that at least one of the first distance CL11 and the second distance CL12 is changed. The second securing portion 270 includes a second curved surface 270a contactable with the bicycle frame 202 such that at least one of the first distance CL11 and the second distance CL12 is changed. In particular, the first curved surface 268a is contactable with the bicycle frame 202 such that at least the first distance CL11 and the second distance CL12 are changed. The second curved surface 270a is contactable with the bicycle frame 202 so that the first distance CL11 and the second distance CL12 are changed.

[0130] As in Fig. As seen in Figure 29, the securing portion 266 includes a first adjustment washer 276 and a second adjustment washer 278. The first adjustment washer 276 includes a first curved receiving surface 276a contactable with the first curved surface 268a of the first securing portion 268. The second adjustment washer 278 includes a second curved receiving surface 278a contactable with the second curved surface 270a of the second fastening portion 270. The first curved receiving surface 276a has a complementary shape with respect to the first curved surface 268a of the first fastening part 268. The second curved receiving surface 278a has a complementary shape with respect to the second curved surface 270a of the second fastening part 270.

[0131] The first securing part 268 includes a first opening 268b. The second securing part 270 includes a second opening 270b. The bicycle frame 202 includes a first through-hole 202e and a second through-hole 202f. The first adjustment bolt 272 extends through the first opening 268b and the first through-hole 202e. The second adjustment bolt 274 extends through the second opening 270b and the second through-hole 202f.

[0132] The securing portion 266 further includes a first sub-washer 280 and a second sub-washer 282. The first sub-washer 280 is provided between the first securing portion 268 and a first head portion 272a of the first adjustment bolt 272. The second sub-washer 282 is provided between the second securing portion 270 and a second head portion 274a of the second adjustment bolt 274. The first adjustment washer 276 and the first sub-washer 280 can maintain an orientation of the first adjustment bolt 272 with respect to the bicycle frame 202 without regard to an orientation of the base member 218 (see Fig. 27). The second adjustment washer 278 and the second sub-washer 282 can maintain an orientation of the second adjustment bolt 274 with respect to the bicycle frame 202 without regard to an orientation of the base member 218 (see Fig. 27).

[0133] As in Fig. 30, the piston 232 in the fastening state is / will be at least partially in a frame area 284, which is defined by the outline of the bicycle frame 202 when viewed from the direction of movement D211 (see Fig. 23) is / is defined, provided in the fastening state in which the base element 218 is / is fastened to the bicycle frame 202. The frame region 284 is / is determined in the fastening state by an outline of the front fork 203 of the bicycle frame 202 when viewed from the direction of movement D211 (see Fig. 23).

[0134] In the illustrated embodiment, the frame portion 284 is defined by an outline of the front fork 203 of the bicycle frame 202 without an opening such as the first recess 202c and the second recess 202d. As shown in Fig. 30, the frame portion 284 is defined by the front surface 203c and the rear surface 203d of the first fork arm 203a of the front fork 3, so that the first recess 202c and the second recess 202d are complemented by the front surface 203c and the rear surface 203d.

[0135] As in Fig. As can be seen in Figure 30, the piston 232 is / will be partially provided in the frame region 284 in the attached state, which is defined by the outline of the bicycle frame 202 when viewed from the direction of movement D211. However, the piston 232 can be entirely provided in the frame region 284 in the attached state when viewed from the direction of movement D211. The central axis A211 is / will be arranged in the frame region 284 in the attached state when viewed from the direction of movement D211.

[0136] As in Fig. 30, the piston 234 in the fastening state is / will be at least partially in the frame area 284, by the outline of the bicycle frame 202 when viewed from the direction of movement D212 (see Fig. 23), provided in the attached state in which the base member 218 is / will be attached to the bicycle frame 202. The piston 234 is / will be partially provided in the frame region 284, which is defined by the outline of the bicycle frame 202 when viewed from the direction of movement D212, in the attached state. However, the piston 234 can be entirely provided in the frame region 284 when viewed from the direction of movement D211. The central axis A212 is / will be arranged in the frame region 284 in the attached state when viewed from the direction of movement D212.

[0137] As in Fig. 30, the actuating section 258 is / will be provided in the fastening state at least partially in the frame region 284 when viewed from the direction of movement D213 (see Fig. 23). In the illustrated embodiment, the actuating portion 258 is / will be provided entirely within the frame region 284 in the attached state when viewed from the direction of movement D213. However, the actuating portion 258 may be partially provided within the frame region 284 in the attached state when viewed from the direction of movement D213.

[0138] As in Fig. As seen in Figure 31, the friction element 214 includes an upstream portion 286 and a downstream portion 288. The downstream portion 288 opposes the upstream portion 286 in a driving rotational motion D202 in which the bicycle rim 205 rotates as a bicycle moves forward.

[0139] In the illustrated embodiment, the upstream portion 286 is an upstream half portion of the friction element 214, and the downstream portion 288 is a downstream half portion of the friction element 214.

[0140] As in Fig. As can be seen in Figure 31, the pressing structure 220 is configured to exert a first pressing force F21 on the downstream portion 288. The pressing structure 220 is configured to exert a second pressing force F22 on the upstream portion 286. The pressing structure 220 is configured to press the friction element 214 against the rotatable element 204 such that the first pressing force F21 is greater than the second pressing force F22.

[0141] As in Fig. As shown in Figure 31, the base member 222 includes a first hydraulic cylinder 290 and a second hydraulic cylinder 292. Specifically, the bicycle brake device 210 includes the base member 222. The first hydraulic cylinder 290 may also be referred to as the hydraulic cylinder 290. The second hydraulic cylinder 292 may also be referred to as the hydraulic cylinder 292. The base member 222 includes the hydraulic cylinder 290 and the hydraulic cylinder 292.

[0142] The pressing structure 220 includes a first piston 294 and a piston 296. The first piston 294 may also be referred to as the piston 294. The second piston 296 may also be referred to as the piston 296. Specifically, the bicycle brake device 210 includes the piston 294 and the piston 296. The pressing structure 220 is configured to exert a first pressing force F21 on the downstream portion 288 by means of the first piston 294. The pressing structure 220 is configured to exert the second pressing force F22 on the upstream portion 286 by means of the second piston 296.

[0143] As in Fig. As can be seen in Figure 31, the first piston 294 is movable within the first hydraulic cylinder 290 and is closer to the downstream portion 288 than to the upstream portion 286. The first piston 294 is provided to push the downstream portion 288 toward the rotatable member 204. The piston 294 is movable within the hydraulic cylinder 290 in a direction of movement D221 to move the friction element 214 toward the rotatable member 204. The first hydraulic cylinder 290 closes a first cylinder bore 298 extending in the direction of movement D221. The first piston 294 is provided to be movable within the first cylinder bore 298.

[0144] The second piston 296 is movable within the second hydraulic cylinder 292 and is closer to the downstream section 286 than to the upstream section 288. The second piston 296 is provided to push the upstream section 286 toward the rotatable member 204. The piston 296 is movable within the hydraulic cylinder 292 in a direction of movement D222 to move the friction element 214 toward the rotatable member 204. The second hydraulic cylinder 292 closes a second cylinder bore 300 extending in the direction of movement D222. The second piston 296 is provided to be movable within the second cylinder bore 300.

[0145] As in Fig. As shown in Figure 31, the bicycle brake device 210 further includes a support member 302. The support member 302 is movably mounted to the base member 222. The support member 302 is coupled to the friction member 214 to movably support the friction member 214 with respect to the base member 222. The support member 302 is provided between the first piston 294 and the second piston 296.

[0146] As in Fig. 31, the support member 302 is movable relative to the base member 222 in a movement direction D223 parallel to the support center axis A223. In particular, the base member 222 includes a support hole 303. The support member 302 is movably provided in the support hole 303. The base member 222 is configured to prevent rotation of the support member 302 relative to the base member 222. For example, the support hole 303 includes a guide groove (not shown). The support member 302 includes a follower (not shown) provided in the guide groove. The guide groove and the follower allow the support member 302 to move relative to the base member 222 in the movement direction while preventing rotation of the support member 302 relative to the base member 222.

[0147] The first piston 294 includes a first central axis A221. The second piston 296 includes a second central axis A222 parallel to the first central axis A221. The first central axis A221 may also be referred to as the central axis A221. The second central axis A222 may also be referred to as the central axis A222. The support element 302 includes a support central axis A223 parallel to the first and second central axes A221 and A222. A first distance L21 between the first central axis A221 and the support central axis A223 is different from the second distance L22 between the second central axis A222 and the support central axis A223. The first distance L21 is longer than the second distance L22. The first central axis A221, the second central axis A222, and the support central axis A223 may be substantially parallel to one another.

[0148] The upstream portion 286 includes an upstream end 286a. The downstream portion 288 includes a downstream end 286b, opposite the upstream end 286a in the drive rotation D202. A third distance L23 between the first piston 294 and the downstream end 286b is different than a fourth distance L24 between the second piston 296 and the upstream end 286a. In the illustrated embodiment, the third distance L23 is shorter than the fourth distance L24.

[0149] As in Fig. 31, the piston 294 is / will be coupled to the friction element 214 without being / will be fixed to the friction element 214. The first piston 294 is / will be configured to push the friction element 214 toward the rotatable member 204 without being / will be fixed to the friction element 214. The first piston 294 is / will be in contact with the friction element 214. The piston 296 is / will be coupled to the friction element 214 without being / will be fixed to the friction element 214. The second piston 296 is / will be configured to push the friction element 214 toward the rotatable member 204 without being / will be fixed to the friction element 214. The second piston 296 is / will be in contact with the friction element 214.

[0150] The downstream portion 288 includes a first receiving surface 288b. The first piston 294 includes a first contact surface 294a, which is contactable with the first receiving surface 288b of the downstream portion 288. The first contact surface 294a is in contact with the first receiving surface 288b when the first piston 294 pushes the downstream portion 288. The first upstream portion 286 includes a second receiving surface 286b. The second piston 296 includes a second contact surface 296a, which is contactable with the first receiving surface 288b of the downstream portion 288. The second contact surface 296a is in contact with the second receiving surface 286b when the second piston 296 pushes the upstream portion 286.

[0151] As in Fig. As shown in Figure 32, the first piston 294 has a first diameter DM21. The second piston 296 has a second diameter DM22, which is different from the first diameter DM21. In the illustrated embodiment, the first diameter DM21 is greater than the second diameter DM22. However, the first diameter DM21 may be equal to or less than the second diameter DM22, if needed and / or desired.

[0152] In the illustrated embodiment, the first distance L21 is different from the second distance L22, and the first diameter DM21 is different from the second diameter DM22. However, the first distance L21 may be equal to the second distance L22 if the first diameter DM21 is different from the second diameter DM22. Furthermore, the first distance DM21 may be equal to the second diameter DM22 if the first diameter L21 is different from the second distance L22.

[0153] As in Fig. 31, a hydraulic chamber 304 is defined by the first hydraulic cylinder 290 and the first piston 294. A second hydraulic chamber 306 is defined by the second hydraulic cylinder 292 and the second piston 296. As shown in Fig. 32, the base member 222 includes a connecting fluid passage 308 that connects the first hydraulic chamber 304 to the second hydraulic chamber 306. One end of the connecting fluid passage 308 is plugged with an end plug. The base member 222 includes an inlet port 310. In the illustrated embodiment, the inlet port 310 is connected to the second hydraulic chamber 306. The base member 222 includes a first drain port 312 and a second drain port 314. The drain port 312 is connected to the additional hydraulic chamber 304 (see Fig. 31). The second drain port 314 is / will be connected to the second hydraulic chamber 306 (see Fig. 31). For example, a drain nipple (not shown) is / is attached to each of the first drain port 312 and the second drain port 314.

[0154] A pressure which is supplied to the first hydraulic chamber 304 (see Fig. 31), is substantially equal to a pressure which is supplied to the second hydraulic chamber 306 (see Fig. 31). Since the first diameter DM21 is larger than the second diameter DM22 (see Fig. 32), the first pressing force F21 is greater than the second pressing force F22 (s Fig. 31). For example, the first pressing force F21 is set in the range of approximately 150% to approximately 200% of the second pressing force F22. The first and second distances L21 and L22 and / or the first and second diameters DM21 and DM22 of the first and second pistons 294 and 296 are set such that the first pressing force F21 is within a range of approximately 150% to approximately 200% of the second pressing force F22.

[0155] As in Fig. 33, the first piston 294 is / will be at least partially provided in a first recess 202g of the bicycle frame 202. The first hydraulic cylinder 290 is / will be at least partially provided in a first recess 202g of the bicycle frame 202. In the illustrated embodiment, the piston 294 is / will be entirely provided in the recess 202g of the bicycle frame 202. The first hydraulic cylinder 290 is / will be partially provided in a first recess 202g of the bicycle frame 202. The first recess 202g is / will be provided in a front surface 203e of the first fork arm 203a of the front fork 3 and extends in the direction of movement D221 of the first piston 294.

[0156] As in Fig. 34, the second piston 296 is / will be at least partially provided in a second recess 202h of the bicycle frame 202. The second hydraulic cylinder 292 is / will be at least partially provided in a second recess 202h of the bicycle frame 202. In the illustrated embodiment, the second piston 296 is / will be partially provided in the second recess 202h of the bicycle frame 202. The second hydraulic cylinder 292 is / will be partially provided in a second recess 202h of the bicycle frame 202. The second recess 202h is / will be provided in a rear surface 203f of the first fork arm 203a of the front fork 3 and extends in the direction of movement D222 of the first piston 296.

[0157] As in Fig. As shown in Figure 31, the bicycle brake device 210 further includes a gap adjustment element 316 configured to adjust a rest position P211 of the friction element 214 relative to the hydraulic cylinder 290. The gap adjustment element 316 is configured to adjust a relative position between the support element 302 and the base element 222. The support element 302 includes a second threaded hole 302a. The gap adjustment element 316 is rotatable relative to the base element 222. In the illustrated embodiment, the gap adjustment element 316 is rotatable relative to the base element 222 and the support element 302 about the support rotation axis A223. The gap adjustment element 316 includes a threaded bolt 318.The threaded bolt 318 is threadedly provided in the threaded hole 302a so that rotation of the distance adjusting member 316 with respect to the base member 222 changes the relative position between the support member 302 and the base member 222.

[0158] The distance adjustment element 316 includes an actuating portion 320 configured to be actuated by the user to adjust the rest position P11 of the friction element 214. In the illustrated embodiment, the actuating portion 320 has a disc shape such that the actuating portion 316 can be actuated without tools. In other words, the adjustment element 320 is configured as a tool-free adjustment element. The threaded bolt 318 includes a first end 318a and a second end 318b opposite the first end 318a. The actuating portion 320 is provided at the first end 318a of the threaded bolt 318.

[0159] As in Fig. 31, the bicycle brake device 210 further includes an adjustment biasing member 322 configured to bias the friction member 214 from the braking position P214 toward the rest position P211 by means of the distance adjusting member 316 and the support member 302. In the illustrated embodiment, the adjustment biasing member 322 is provided between the base member 222 and the actuating portion 320 of the distance adjusting member 316. The adjustment biasing member 322 is configured to bias the distance adjusting member 316 such that the actuating portion 320 moves away from the base member 222. The distance adjusting member 316 includes a flange 324 contactable with the base member 222. The flange 324 extends radially from the threaded bolt 318 and is provided in the support hole 303. The base member 222 includes a stopper 326 which is contactable with the flange 324.The flange 324 is pressed against the stopper 326 by a preload force of the adjusting preload element 316. This can position the friction element 214 at the rest position P211.

[0160] As in Fig. 35, the base member 222 includes a securing portion 328 configured to be attached to the bicycle frame 202 such that an orientation of the friction member 214 is adjustable relative to the bicycle frame 202. In the illustrated embodiment, the securing portion 328 includes a first securing part 330 and a second securing part 332. The first securing part 330 is mounted to the base member 222 and extends from the base member 222. The second securing part 332 is mounted to the base member 222 and extends from the base member 222. The second securing part 332 opposes the first securing part 330.

[0161] The bicycle brake device 210 further includes a first adjustment bolt 334 and a second adjustment bolt 336. The first adjustment bolt 334 is configured to couple the first securing part 330 to the bicycle frame 202. The second adjustment bolt 336 is configured to couple the second securing part 332 to the bicycle frame 202.

[0162] As in Fig. As can be seen in Figure 31, a first distance CL21 is defined between the downstream portion 288 and the rotatable member 204 in a rest state, in which the friction element 214 is disposed without being pressed by the push structure 220. A second distance CL22 is defined between the upstream portion 286 and the rotatable member 204 in the rest state. In the illustrated embodiment, the friction element 214 is disposed in the rest position P211 in the rest state.

[0163] As in Fig. 36, the securing portion 328 includes a curved surface contactable with the bicycle frame 202 such that at least one of the first distance CL21 and the second distance CL22 is changed. In the illustrated embodiment, the first securing portion 330 includes a first curved surface 330a contactable with the bicycle frame 202 such that at least one of the first distance CL21 and the second distance CL22 is changed. The second securing portion 332 includes a second curved surface 332a contactable with the bicycle frame 202 such that at least one of the first distance CL21 and the second distance CL22 is changed. Specifically, the first curved surface 330a is contactable with the bicycle frame 202 such that at least one of the first distance CL21 and the second distance CL22 is changed.The second curved surface 332a is contactable with the bicycle frame 202 so that at least one of the first distance CL21 and the second distance CL22 is changed.

[0164] As in Fig. 37, the securing portion 328 includes a first adjustment washer 338 and a second adjustment washer 340. The first adjustment washer 338 includes a first curved receiving surface 338a contactable with the first curved surface 330a of the first securing portion 330. The second adjustment washer 340 includes a second curved receiving surface 340a contactable with the second curved surface 332a of the second fastening portion 332. The first curved receiving surface 338a has a complementary shape relative to the first curved surface 330a of the first fastening portion 330. The second curved receiving surface 340a has a complementary shape relative to the second curved surface 332a of the second fastening portion 332.

[0165] The first securing part 330 includes a first opening 330b. The second securing part 332 includes a second opening 332b. The bicycle frame 202 includes a first through-hole 202i and a second through-hole 202j. The first adjustment bolt 334 extends through the first opening 330b and the first through-hole 202i. The second adjustment bolt 336 extends through the second opening 332b and the second through-hole 202j.

[0166] The securing portion 328 further includes a first adjustment washer 342 and a second adjustment washer 344. The first sub-washer 342 is provided between the first securing part 330 and a first head part 334a of the first adjustment bolt 334. The second sub-washer 344 is provided between the second securing part 332 and a second head part 336a of the second adjustment bolt 336. The first adjustment washer 338 and the first sub-washer 342 can maintain an orientation of the first adjustment bolt 334 with respect to the bicycle frame 202 without regard to an orientation of the base member 222 (see Fig. 35). The second adjustment washer 340 and the second sub-washer 344 can maintain an orientation of the second adjustment bolt 336 with respect to the bicycle frame 202 without regard to an orientation of the base member 222 (see Fig. 35).

[0167] As in Fig. 38, the piston 294 is / will be at least partially in a frame area 346, which is defined by the outline of the bicycle frame 202 when viewed from the direction of movement D221 (see Fig. 31) is / is defined, provided in the fastening state in which the base element 222 is / is fastened to the bicycle frame 202. The frame region 346 is / is defined in the fastening state by an outline of the front fork 203 of the bicycle frame 202 when viewed from the direction of movement D221 (see Fig. 31).

[0168] In the illustrated embodiment, the frame portion 346 is defined by an outline of the front fork 203 of the bicycle frame 202 without an opening such as the first recess 202g and the second recess 202g. In Fig. 38, for example, the frame portion 346 is defined by the front surface 203e and the rear surface 203f of the first fork arm 203a of the front fork 3 such that the first recess 202g and the second recess 202h are complemented by the front surface 203e and the rear surface 203f.

[0169] As in Fig. As can be seen in Figure 38, the piston 294, in the attached state, is / will be partially provided in the frame region 346, which is / will be defined by the outline of the bicycle frame 202 when viewed from the direction of movement D221. However, the piston 294, in the attached state, can be entirely provided in the frame region 346 when viewed from the direction of movement D221. The central axis A221 is / will be arranged in the frame region 346 when viewed from the direction of movement D221 in the attached state.

[0170] As in Fig. 38, the piston 296 is / will be at least partially in the frame area 346, by the outline of the bicycle frame 202 when viewed from the direction of movement D222 (see Fig. 31), provided in the attached state in which the base member 222 is / will be attached to the bicycle frame 202. The piston 296 is / will be partially provided in the frame region 346, which is defined by the outline of the bicycle frame 202 when viewed from the direction of movement D222, in the attached state. However, the piston 296 can be entirely provided in the frame region 346 when viewed from the direction of movement D221. The central axis A222 is arranged in the frame region 346 in the attached state when viewed from the direction of movement D222.

[0171] As in Fig. 38, the actuating section 320 is / will be provided at least partially in the fastening state in the frame area 346 when viewed from the direction of movement D223 (see Fig. 31). In the illustrated embodiment, the actuating portion 320 is / will be provided entirely in the frame region 346 in the attached state when viewed from the direction of movement D223. However, the actuating portion 320 may be partially provided in the frame region 346 in the attached state when viewed from the direction of movement D223.

[0172] If, as in Fig. 39, a friction element 212 is pressed against the bicycle rim 5 by the pressing structure 216, the upstream portion 224 is likely to be pulled toward the bicycle rim 5 due to a frictional force between the upstream portion 224 and the bicycle rim 5. This pivots the friction element 212 with respect to the base member 218, causing the downstream portion 226 to move away from the bicycle rim 5.

[0173] However, in the illustrated embodiment, since the first pressing force F11 is greater than the second pressing force F12, the pivoting of the friction element 212 is reduced. Specifically, the pressing structure 216 is configured to press the upstream portion 224 and the downstream portion 226 against the bicycle rim 205 so that a first contact pressure between the downstream portion 226 and the bicycle rim 205 is close to a second contact pressure between the upstream portion 224 and the bicycle rim 205 during braking. The term "the first contact pressure is close to the second contact pressure" as used herein means that the first contact pressure is in the range of approximately 50% to approximately 100% of the second contact pressure.

[0174] If, in a similar way as in Fig. 39, a friction element 214 is pressed against the bicycle rim 5 by the pressing structure 220, the upstream portion 286 is expected to be pulled toward the bicycle rim 5 due to a frictional force between the upstream portion 286 and the bicycle rim 5. This pivots the friction element 214 with respect to the base member 222, causing the downstream portion 288 to move away from the bicycle rim 5.

[0175] However, in the illustrated embodiment, since the first pressing force F21 is greater than the second pressing force F22, the pivoting of the friction element 214 is reduced. Specifically, the pressing structure 220 is configured to press the upstream portion 286 and the downstream portion 288 against the bicycle rim 205, so that a first contact pressure between the downstream portion 288 and the bicycle rim 205 is close to a second contact pressure between the upstream portion 286 and the bicycle rim 205 during braking.

[0176] In the case of the bicycle brake device 210, as in Fig. As can be seen in Figure 30, the piston 232 is at least partially disposed in the frame region 284, defined by the outline of the bicycle frame 202 when viewed from the direction of movement D211, in the fastening state in which the base member 218 is / will be fastened to the bicycle frame 212. Accordingly, it is possible to make the bicycle brake device 210 more compact.

[0177] Similarly, as in Fig. 30, the piston 234 is provided at least partially in the frame region 284, defined by the outline of the bicycle frame 202 when viewed from the direction of movement D212, in the fastening state in which the base element 218 is / will be fastened to the bicycle frame 202. Accordingly, it is possible to make the bicycle brake device 210 more compact.

[0178] As in Fig. As can be seen in Figure 38, the piston 294 is / will be provided at least partially in the frame region 346, defined by the outline of the bicycle frame 202 when viewed from the direction of movement D221, in the fastening state in which the base member 222 is / will be fastened to the bicycle frame 202. Accordingly, it is possible to make the bicycle brake device 210 more compact.

[0179] As in Fig. As can be seen in Figure 38, the piston 296 is / will be provided at least partially in the frame region 346, defined by the outline of the bicycle frame 202 when viewed from the direction of movement D222, in the fastening state in which the base element 222 is / will be fastened to the bicycle frame 202. Accordingly, it is possible to make the bicycle brake device 210 more compact. Third embodiment

[0180] A bicycle brake device 410 according to a third embodiment will be described below with reference to the Fig. 40 to 43. The bicycle brake device 410 has substantially the same configuration as the bicycle brake device 210 except for the arrangement of the bicycle brake device 410. Elements having substantially the same function as those in the above embodiments are therefore denoted by the same reference numerals and will not be described in detail here for the sake of brevity.

[0181] As in Fig. As can be seen in Figure 40, the bicycle brake device 410 according to a third embodiment is / is designed for mounting on the bicycle frame 202. In contrast to the bicycle brake device 210, the bicycle brake device 410 is / is provided in a mounting recess 406 of the bicycle frame 202.

[0182] As in Fig. 41, the hydraulic cylinder 228, in the attached state, is / will be provided at least partially between the friction element 212 and the bicycle frame 202 when viewed from the direction of movement D211. In the illustrated embodiment, the hydraulic cylinder 228, in the attached state, is / will be provided entirely between the friction element 212 and the bicycle frame 202 when viewed from the direction of movement D211. However, the hydraulic cylinder 228, in the attached state, may be partially provided between the friction element 212 and the bicycle frame 202 when viewed from the direction of movement D211.

[0183] As in Fig. 42, the piston 232 is / will be provided at least partially in the arrangement recess 406 of the bicycle frame 202 in the attached state. In the illustrated embodiment, the piston 232 is / will be provided entirely in the arrangement recess 406 of the bicycle frame 202 in the attached state. However, the piston 232 may be / will be provided partially in the arrangement recess 406 of the bicycle frame 202 in the attached state.

[0184] The hydraulic cylinder 228 is / will be provided at least partially in the arrangement recess 406 of the bicycle frame 202 in the attached state. In the illustrated embodiment, the hydraulic cylinder 228 is / will be provided entirely in the arrangement recess 406 of the bicycle frame 202 in the attached state. However, the hydraulic cylinder 228 may be / will be provided partially in the arrangement recess 406 of the bicycle frame 202 in the attached state.

[0185] As in Fig.As can be seen in Figure 42, the piston 232, in the attached state, is / will be provided entirely within the interior space 407 of the bicycle frame 202 when viewed from the direction of movement D211. However, the piston 232, in the attached state, can be provided at least partially within the interior space 407 of the bicycle frame 202 when viewed from the direction of movement D211.

[0186] In the mounted state, the hydraulic cylinder 228 is / will be provided entirely within the interior space 407 of the bicycle frame 202 when viewed from the direction of movement D211. However, in the mounted state, the hydraulic cylinder 228 is / will be provided at least partially within the interior space 407 of the bicycle frame 202 when viewed from the direction of movement D211.

[0187] As in Fig. As shown in Figure 40, the first securing part is / is attached to a first securing part 490 of the bicycle frame 202 by means of the first adjustment bolt 272. The second securing part 270 is / is attached to a first securing part 492 of the bicycle frame 202 by means of the first adjustment bolt 274. The first locating part 490 and the second locating part 492 are / are provided in the locating recess 406 of the bicycle frame 202.

[0188] As in Fig. 43, the first mounting part 490 includes a first curved receiving surface 490a contactable with the first curved surface 268a of the first securing part 268. The second mounting part 492 includes a second curved receiving surface 492a contactable with the second curved surface 270a of the second mounting part 270. These structures allow the friction element 212 to be adjusted in orientation relative to the bicycle frame 202.

[0189] Since the first brake unit BU1 and the second brake unit BU2 are symmetrical with respect to the virtual center plane PL2, the structure of the second brake unit BU2 will not be described and / or illustrated in detail here for the sake of brevity.

[0190] In the case of the bicycle brake device 410, it is possible to obtain substantially the same advantageous effects as those in the case of the bicycle brake device 210 according to the second embodiment.

[0191] The ordinal numbers used in this application, such as "first" and "second," are to be considered merely as identifiers and have no further meaning, such as a specific order or the like. Furthermore, for example, the term "first element" itself does not imply the presence of a "second element," and the term "second element" itself does not imply the presence of a "first element."

[0192] The term “pair of” as used herein may include the embodiment in which the pair of elements have different shapes or structures from each other as well as the embodiment in which the pair of elements have the same shapes or structures.

[0193] Obviously, numerous modifications or variations of the present invention may be made in light of the above teachings. It is therefore to be understood that, within the scope of the appended claims, the invention may be practiced otherwise than as specifically described. Reference symbol: 10 Bicycle brake device 12; 16 friction element 14; 18 base element 34; 40 hydraulic cylinder 36; 42 pistons D21; D22 Direction of movement 4 rotating element 46; 92 frame area 2 bicycle frames 88; 134 Distance adjustment element 89; 135 operating section A21; A22 central axis 6 Arrangement recess 7 Interior 64;110 intermediate element 3 front fork

Claims

[1] Bicycle brake device (10) comprising: a friction element (12; 16); a base member (14; 18) including a hydraulic cylinder (34; 40); a piston (36; 42) movable in the hydraulic cylinder (34; 40) in a direction of movement (D21; D22) to move the friction element (12; 16) towards a rotatable element (4), wherein the piston (36; 42) is / is provided at least partially in a frame region (46; 92) defined by an outline of the bicycle frame (2) when viewed from the direction of movement (D21; D22) in a fastening state in which the base element (14; 18) is / is fastened to the bicycle frame (2); and a distance adjustment element (88; 134) designed to adjust a rest position of the friction element (12; 16) with respect to the hydraulic cylinder (34; 40), wherein the distance adjustment element (88; 134) includes an actuating portion (89; 135) designed to be actuated by the user to adjust the rest position of the friction element (12; 16), and wherein the actuating portion (89; 135) in the fastening state, when viewed from the direction of movement (D21, D22), is / is provided at least partially in and at least partially outside the frame region (46; 92). [2] Bicycle brake device (10) according to claim 1, wherein the piston (36; 42) has a central axis (A21, A22) which is arranged in the frame region (46; 92) in the fastening state when viewed from the direction of movement (D21; D22). [3] Bicycle brake device (10) according to one of claims 1 to 2, wherein the piston (36; 42) in the fastening state is / is arranged at least partially in an arrangement recess (6) of the bicycle frame (2). [4] Bicycle brake device (10) according to one of claims 1 to 3, wherein the piston (36; 42) in the fastening state is / is provided entirely in the frame region (46; 92) when viewed from the direction of movement (D21; D22), and in particular in an interior space (7) of the bicycle frame (2). [5] Bicycle brake device (10) according to claim 1, wherein the hydraulic cylinder (34; 40) in the fastening state is / is provided at least partially in an arrangement recess (6) of the bicycle frame (2). [6] Bicycle brake device (10) according to one of claims 1 to 5, wherein the hydraulic cylinder (34; 40) is / is provided either entirely in the interior (7) of the bicycle frame (2) in the fastening state when viewed from the direction of movement (D21; D22), or at least partially in the fastening state between the friction element (12; 16) and the bicycle frame (2) in the direction of movement (D21; D22). [7] Bicycle brake device (10) according to one of claims 1 to 6, wherein the piston (36; 42) is / is coupled to the friction element (12; 16) without being / is fixed to the friction element (12; 16), and in particular the bicycle brake device (10) further comprises an intermediate element (64; 110) which is / is provided between the piston (36; 42) and the friction element (12; 16) such that the intermediate element (64; 110) moves the friction element (12; 16) in response to a movement of the piston (36; 42). [8] Bicycle brake device (10) according to one of claims 1 to 7, wherein the frame portion (46; 92) in the fastening state is defined by an outline of the front fork (3) of the bicycle frame (2) when viewed from the direction of movement (D21; D22) is / will be defined.

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