CN217554119U - Bicycle control device - Google Patents

Abstract

The utility model discloses a bicycle control device, include: a base member (14), a hydraulic brake mechanism (40) located inside the base member (14), the hydraulic brake mechanism (40) including a hydraulic cylinder (42) and a movable piston (44) in fluid communication with a hydraulic line (48), a cam mechanism (64) having a cam portion (641) and a first leg (643), the first leg (643) being in direct contact with an end of the piston (44) located outside the hydraulic cylinder (42); an operating member (50) pivotally connected to the cam portion (64) by an operating pivot (60). When the operating member (50) moves in the brake path direction, the first leg (643) of the cam mechanism (64) applies a pushing force to the piston (44) under the action of the operating pivot (60), so that the piston (44) linearly moves inward along the cylinder wall of the hydraulic cylinder (42). By adopting the device, hydraulic braking can be carried out on the bicycle.

Description

Bicycle control device

Technical Field

The present invention relates to a bicycle control device, and more particularly, to a bicycle control device including a hydraulic brake mechanism.

Background

The main principle of hydraulic braking is to use an operable component such as a handle to drive a piston to squeeze an oil cylinder, so that the oil cylinder outputs a liquid with a certain pressure to press a braking component arranged on a wheel, thereby realizing braking and controlling the bicycle.

In prior art hydraulically controlled bicycles, the hydraulic brake mechanism is often disposed within and secured to a base member that is attached to the bicycle handlebar. A bicycle control device as disclosed in applicant's patent publication No. CN213735392U includes a base member, a hydraulic brake mechanism and a shift control unit fixedly disposed inside the base member; and an operating member operatively coupled to the hydraulic brake mechanism and the shift control mechanism, the operating member driving the shift control mechanism to shift gears about a shift pivot axis during the shift, the operating member performing braking by driving a piston of the hydraulic control device to move inward to generate hydraulic pressure to a hydraulic line communicating with a brake member of the wheel during a braking operation. In the solution of this patent, the upper end of the operating member is connected to a rod member of the piston mechanism, which is disposed in a spherical groove of a first portion of the piston and is rotatably coupled with respect to the first portion. This may cause the piston to produce an operating dead center with the cylinder wall as the piston moves into the cylinder, thereby affecting the braking force.

The applicant's publication No. CN205632877U discloses a bicycle control device that performs braking and shifting operations using a single operating lever, and discloses a shift control mechanism, an operating member, and a connection structure between the shift control mechanism and the operating member, but this technical solution does not relate to a hydraulic brake mechanism.

Disclosure of Invention

An object of the utility model is to provide a bicycle control device who contains hydraulic braking mechanism, it can get rid of or reduce the operation dead point that influences the braking force when carrying out the brake operation.

According to the utility model discloses a bicycle control device that provides, include:

a base member mounted to the bicycle through a fitting member;

a hydraulic brake mechanism fixedly disposed within the base member, the hydraulic brake mechanism including a hydraulic cylinder in fluid communication with a hydraulic tube of a brake member coupled to a wheel and a piston movable within the hydraulic cylinder, a portion of the piston being disposed outside of the hydraulic cylinder,

a cam mechanism including a cam portion and a first leg extending upwardly from the cam portion, the first leg being in direct contact with an end of the piston located outside the hydraulic cylinder;

an operating member pivotally connected to the cam portion by an operating pivot;

wherein when the operating member moves in a braking path direction under a braking operation, the first leg of the cam mechanism applies a pushing force to the piston under the action of the operating pivot, so that the piston linearly moves inward along the cylinder wall of the hydraulic cylinder.

Optionally, the end of the piston is a flat end, and a surface of the first leg of the cam mechanism in direct contact with the flat end is a plane.

Optionally, the upper end of the first branch member of the cam mechanism is provided with a U-shaped groove, and the cam mechanism further includes a bearing member, and the bearing member is rotatably mounted in the U-shaped groove through a coupling pin. Said end of said piston is a flat end, said bearing member being in direct contact with said flat end.

Optionally, the piston comprises a first portion located within the cylinder and a second portion located within the hydraulic tube, the first and second portions being integrally formed or fixedly connected.

Optionally, the bicycle control device further includes a shift control mechanism disposed inside the base member and rotatable about a pivot axis of a shift pivot shaft. The shift control mechanism includes a downwardly extending shift contact.

The bicycle control device also includes a mounting structure that includes a mounting member and a support member. The mounting member is a U-like member transversely disposed and open toward the piston and having a front side wall, a rear side wall and a right side wall. The supporting piece is arranged in parallel with the right side wall and forms a certain spacing space with the right side wall, and the supporting piece and the mounting piece are fixed together.

The cam portion is disposed between the front and rear side walls, and the operating pivot is pivotally connected to the mounting member and extends through the upper end portion of the operating member, the front and rear side walls of the mounting member, and the cam portion.

The bicycle control device further includes a shift lever. The shift adjustment lever extends through the mounting member and the support member. The mounting structure is rotatably connected with the speed-change adjusting rod, and the speed-change adjusting rod is parallel to the gear-shifting pivot.

The lower end of the shifting contact extends through the support into the spacing space and is spaced from the front side of the support by a spacing distance.

When the operating member moves in the direction of the shift speed change path under a shifting operation, the mounting structure together with the operating member can rotate around the axis of the shift adjusting lever so that the supporting member rotates to abut against the shift contact portion and thereby drives the shift control mechanism to rotate around the pivot axis of the shift pivot shaft.

Optionally, the support member comprises an upper portion and a strip-shaped lower portion narrower than the upper portion, the shift contact of the shift control mechanism being arranged to pass under the upper portion and spaced a spatial distance from a front side of the lower portion. The shift adjustment lever extends through a right side wall of the mounting member and an upper portion of the support member.

Optionally, a groove is formed at the upper end of the operating element, and a pair of pivot holes is formed on the groove walls at two sides of the groove. The front and rear side walls of the mounting member are disposed within the recess and are also formed with a pair of pivot holes, and the cam portion is formed with a pivot hole. The operating pivot extends through the recess wall of the operating member, the front and rear side walls of the mounting member and the cam portion.

Alternatively, the cam mechanism includes a second leg extending in a lower right direction from the cam portion, the second leg being aligned with the grip direction of the operating member.

Optionally, the bicycle control device further comprises a first return spring sleeved on the operating pivot and arranged to enable the operating member to return to an initial position under the torsion force of the first return spring.

The bicycle control device further includes a second return spring that is sleeved on the shift adjusting lever and is arranged such that the mounting structure and the operating member can return to an initial position under a torsion force of the second return spring.

The hydraulic brake mechanism has a portion of a base frame disposed within the spaced-apart space, and the shift adjustment lever also extends through the base frame.

According to the utility model discloses another kind of bicycle control device that provides includes:

a base member;

a shift control mechanism disposed within the base member and rotatable about a pivot axis of a shift pivot shaft in a shift speed path direction, the shift control mechanism including a shift contact portion extending downward;

a hydraulic brake mechanism disposed inside the base member, the hydraulic brake mechanism including a hydraulic cylinder and a piston movable within the hydraulic cylinder, a portion of the piston being located outside the hydraulic cylinder;

operating member operable to perform shift and brake operations

A cam mechanism including a cam portion and a first leg extending upwardly from the cam portion, the first leg being in direct contact with an end of the piston located outside the hydraulic cylinder;

the mounting structure comprises a U-shaped mounting piece which is opened towards the piston direction, the mounting piece comprises a front side wall, a rear side wall and a right side wall, and the cam part is arranged between the front side wall and the rear side wall of the U-shaped mounting piece;

an operating pivot rotatably connecting an upper end portion of the operating member with the front and rear side walls of the mounting member and the cam portion;

a shift adjustment lever parallel to the shift pivot shaft and extending through a right side wall of the mounting member such that the mounting structure is rotatably coupled to the shift adjustment lever;

the mounting structure further comprises a shift adjustment contact extending from a right side wall of the U-shaped mounting member, the shift adjustment contact being spaced a spatial distance from the shift adjustment contact;

the shift adjustment contact is arranged such that the operating member is spaced a spatial distance from the shift contact when in the initial position, and such that movement of the operating member in the direction of the shift path causes the mounting structure to rotate together about the axis of the shift adjustment lever against the shift contact and thus causes the shift control mechanism to rotate about the pivot axis of the shift pivot.

Optionally, the end of the piston is a flat end. When the operating member moves in the direction of the braking path under the braking operation, the first support member of the cam mechanism applies a pushing force to the flat end portion of the piston, so that the piston linearly moves inwards along the cylinder wall of the hydraulic cylinder.

The utility model discloses among the bicycle control device, the piston receives the effect of operating parts can follow linear movement well when the cylinder wall inward shifting of hydro-cylinder is followed, avoids the piston to form the dead point with the cylinder wall in to the hydro-cylinder in the propulsion process to can improve hydraulic braking mechanism to brake mechanism's control ability, export stable expectation braking force.

Drawings

FIG. 1 is a cross-sectional view of a bicycle control device in accordance with an embodiment of the present invention, wherein the operating member is in an initial position.

FIG. 2 is a perspective view of a portion of the bicycle control device illustrated in FIG. 1 in accordance with the present embodiment.

FIG. 3 is an assembled schematic view of a portion of the bicycle control device illustrated in FIG. 1 in accordance with the present embodiment.

FIG. 4 is a cross-sectional view of a bicycle control device in accordance with another embodiment of the present invention, with the operating member in the initial position.

FIG. 5 is an exploded view of a portion of the bicycle control device illustrated in FIG. 4 in accordance with the present embodiment.

FIG. 6 is a first shift speed change path schematic of the bicycle control device in accordance with an embodiment of the present invention.

FIG. 7 is a second shift speed change path schematic of the bicycle control device in accordance with an embodiment of the present invention.

FIG. 8 is a schematic view of the bicycle control device illustrated in FIG. 1 in a braking state.

Fig. 9 is a partial perspective view of the hydraulic tube path of the bicycle control device in accordance with an embodiment of the present invention.

Illustration of the drawings:

10-a bicycle control device; 12-a mounting ring; 14-a base member; 14 a-a first end portion; 14 b-a second end;

30-a shift control mechanism; 32-a shift control mechanism body; 36-shift contact;

40-a hydraulic braking mechanism; 42-hydraulic cylinder; 44-a piston; 44 a-a first portion; 44 b-a second portion; 46-a piston return spring; 47-oil passing screw; 48-hydraulic pipes; 421-oil injection hole; 422-first oil path; 424-second oil path; 49-base frame;

50-an operating member; 52-a groove; 521-a first pivot hole; 60-operating a pivot; 62-a first return spring;

64-a cam mechanism; 641-a cam portion; 642-second pivot hole; 643 — a first leg; 645 — second leg; 644-U-shaped groove; 65-a bearing member; 66-a coupling pin;

70-a variable speed adjusting rod; 72-a second return spring; 74-a mounting member; 741-front sidewall, 743-back sidewall; 745-right side wall; 76-a support member; 761-the upper part of the support; 763-the lower part of the support;

p1-axis of shift pivot.

Detailed Description

The technical solutions of the embodiments will be clearly and completely described below with reference to the drawings of the specification of the present application. Those skilled in the art will appreciate that the embodiments described in the specification are only some embodiments, and not all embodiments, of the invention of the present invention. All other embodiments obtained by a person skilled in the art based on the embodiments described in the present application without any inventive step are within the scope of the present invention.

The embodiments illustrated in FIGS. 1-9 of the present application are all right hand held bicycle control devices. It should be noted that the control device according to the embodiment of the present invention can be configured as a control device that is held by the left hand. In order to facilitate understanding of the invention of the present invention, a control device held by a right hand will be described as an example.

To facilitate a clear description of the technical solutions of the present invention and to facilitate the understanding of the present invention by the reader, the present application uses directional terms to describe the positional and orientational relationships of various components and members of the bicycle control device, such as upper, lower, left, right, front, rear, upward, downward, etc., with reference to the placement of the bicycle control device as shown in fig. 1 and 4. Such terms should be understood as referring to the embodiments illustrated in the drawings of the present application. One skilled in the art will appreciate that when the bicycle control device is placed in other orientations, the positional and orientational relationships between the components will change accordingly.

Fig. 1 illustrates a cross-sectional view of a bicycle control device in accordance with an embodiment of the present invention. As seen in FIG. 1, the bicycle control device 10 includes a base member 14, a shift control mechanism 30, a hydraulic brake mechanism 40 and an operating member 50. The base member 14 includes a first end 14a and a second end 14b opposite the first end 14 a. A mounting member, such as a mounting ring 12, is disposed at the first end 14a of the base member 14. As shown in FIG. 1, the base member 14 is secured to the handlebar of the bicycle by the mounting ring 12. The second end 14b of the base member 14 is distal from the bicycle handlebar. The operating member 50 is shown in the initial position in the view of fig. 1.

In one embodiment of the present application, the bicycle control device 10 can include a shift control mechanism 30 that is disposed inside the base member 14 and adjacent to the first end 14 a. The shift control mechanism 30 is rotatable about the shift pivot axis P1 in the shift speed direction. As seen in fig. 2, the shift control mechanism 30 can include a shift control mechanism body 32 and a downwardly extending shift contact 36. The shift control mechanism 30 in the various embodiments of the present invention has a structure and an implementation manner known in the art, and a person skilled in the art can know the implementation manner of the shift control mechanism after reading the present specification, and will not be further described in detail herein.

The bicycle control device 10 also includes a hydraulic brake mechanism 40. The hydraulic brake mechanism 40 is disposed inside the base member 14 and near the second end 14b of the base member 14. The hydraulic brake mechanism 40 includes a hydraulic cylinder. In the embodiment shown in fig. 1, the hydraulic cylinder includes an automatic oil supply chamber 41 and a compression cylinder 42 located below the oil supply chamber, and the inner cavity of the oil supply chamber 41 is in fluid communication with the inner cavity of the compression cylinder 42 through a passage 45. The compression cylinder 42 is in fluid communication with a hydraulic line 48 through a hollow oil through screw 47, the hydraulic line 48 being connected to the bicycle brake mechanism. A hollow air bag communicated with the external environment is arranged in the oil compensation chamber 41. When the air temperature rises, the oil temperature rises and expands, and the oil in the compression cylinder 42 enters the oil compensation chamber 41 through the passage 45. This avoids automatic braking caused by the oil in the oil cylinder 42 flowing through the hydraulic pipe 48 to the brake mechanism to press the caliper due to the increase in the temperature of the outside atmosphere. When the air temperature drops, the oil in the oil supply chamber 41 returns to the compression cylinder 42. In addition, if the caliper gap of the brake mechanism becomes large after the bicycle is used for a while, the brake gap is varied, and at this time, the pressure of the oil supply chamber 41 is adjusted to adjust the oil pressure applied to the brake mechanism. Although the description has been given by taking the case where the hydraulic cylinder includes the compression cylinder and the oil compensating chamber as an example, it will be readily understood by those skilled in the art that the hydraulic cylinder may include only the compression cylinder 42 in other embodiments.

As shown in fig. 1, the hydraulic brake mechanism 40 further includes a piston 44 and a piston return spring 46. The inner cavity of the compression cylinder 42 is provided with an opening on the right side and the left side of the inner cavity is a cavity bottom. A spring 46 and a portion of the piston 44 are disposed within the compression cylinder 42. The piston 44 includes a first portion 44a located within the cylinder interior cavity and a second portion 44b extending from the first portion 44a through the opening to the exterior of the cylinder. In the embodiment of fig. 1, the first portion 44a and the second portion 44b are integrally formed. In other embodiments, the second portion 44b may be fixedly connected to the first portion 44a.

Referring to fig. 9, the hydraulic brake mechanism 40 is provided with an oil hole 421 at a position adjacent to the compression cylinder 42, the oil hole 421 being in fluid communication with one end of the first oil passage 422, and the hydraulic pipe 48 being in fluid communication with the other end of the first oil passage 422. The hydraulic brake mechanism 40 further includes a second oil passage 424, one port of the second oil passage 424 being in fluid communication with the compression cylinder 42, and the other port thereof being in fluid communication with the first oil passage 422. When the piston 44 linearly moves along the cylinder wall line of the inner chamber of the compression cylinder 42, the fluid in the compression cylinder 42 flows to the hydraulic pipe 48 through the first fluid passage 422 and then flows to the brake mechanism of the bicycle through the hydraulic pipe 48.

Referring to fig. 1, a piston return spring 46 of the hydraulic brake mechanism 40 is provided between the first portion 44a of the piston 44 and the bottom of the compression cylinder 42. In one embodiment, one end of the spring 46 is in contact with the bottom of the inner chamber of the compression cylinder 42 and the other end is connected to the first portion 44a of the piston 44. In another embodiment, the first portion 44a of the piston is at least partially disposed within the inner race of the piston return spring 46.

1-3, the bicycle control device 10 further includes an operating member 50 and a cam mechanism 64. The operating member 50 is rotatably connected to a cam mechanism 64 by an operating pivot 60. Thus, the operating member 50 is rotatable about the axis of the operating pivot 60 relative to the cam mechanism 64 when moved in the direction of the brake path (as shown in FIG. 8).

In one embodiment, referring to fig. 2, 3 and 5, the upper end of the operating member 50 is provided with a groove 52, and a pair of first pivot holes 521 are opened on the side wall of the groove 52. The cam mechanism 64 includes a cam portion 641 disposed in the groove 52, and the cam portion 641 has a second pivot hole 642. The operating pivot 60 passes through the first pivot hole 521 and the second pivot hole 642 so that the cam portion 641 of the cam mechanism 64 is fitted into the recess 52 of the operating member 50. The cam mechanism 64 further includes a first leg 643 extending upward from the cam portion 641 and a second leg 645 extending downward and rightward from the cam portion 641. The operating member 50 is an operating handle and the second leg 645 of the cam mechanism 64 extends in the direction of the handle.

In the embodiment shown in fig. 1, the second portion 44b of the piston 44 has a flattened end. The first member 641 is in direct contact with the flat end of the piston 44. The surface of the first member 641 which directly contacts the flat end of the piston 44 is a flat surface.

Fig. 4 is a cross-sectional view of a bicycle control device in accordance with another embodiment of the present invention. FIG. 5 is an exploded view of the partial structure of the bicycle control device illustrated in FIG. 4.

In the embodiment shown in fig. 4, the first leg 643 is formed with a U-shaped groove 644 at an upper end portion thereof, and the U-shaped groove 644 is formed with a pair of holes on both side walls. The bearing member 65 is provided with a central hole. The coupling pin 66 passes through the hole in the U-shaped groove 644 and the center hole of the bearing member 65, thereby mounting the bearing member 65 in the U-shaped groove 644 of the cam mechanism. The bearing member 65 is in direct contact with the flat end of the second portion 44b of the piston 44. When the operating member 50 moves from the initial position along the braking path shown in fig. 8, the first leg 643 abuts against the piston 44 and applies a pushing force to the piston 44 that moves linearly inward along the cylinder wall. In this process, the bearing member 65 may rotate about the coupling pin 66, and thus reduce the frictional force between the first member 643 and the end of the piston 44. The embodiment of fig. 4 has no difference from the embodiment of fig. 1 except that the bearing member 65 is mounted on the first support 643. Accordingly, in the drawings of the bicycle control devices of the two embodiments, like reference numerals are used for like parts, structures, etc.

In one embodiment, as seen in fig. 1-5, the bicycle control device 10 further includes a mounting member 74. The mounting member 74 is formed as a transversely disposed U-like member having a front side wall 741, a rear side wall 743 and a right side wall 745, and the left side of the mounting member 74 is open toward the piston 44. A pair of pivot holes 742 are formed in the front 741 and rear 743 side walls of the mounting member 74. The cam portion 641 and the first piece 643 are disposed between the front side wall 741 and the rear side wall 743 of the mount 74. The front and rear side walls 741 and 743 of the mounting member 74 are received in the recess 52 of the operating member 50. A rod-shaped operating pivot 60 passes through a pair of first pivot holes 521 on the side walls of the recess 52, pivot holes on the front and rear side walls of the mounting member 74, and a second pivot hole 642 on the cam portion 641. Such that the operating member 50 is rotatably coupled to the cam mechanism 64 and the mounting member 74.

In one embodiment, the bicycle control device 10 further includes a pair of first annular coupling parts 647. Each of the first annular coupling parts 647 has a circular protrusion, and the aperture of the second pivot hole 642 is matched to the outer diameter of the circular protrusion, so that a pair of the first annular coupling parts 647 can be fitted into the second pivot hole 642 from both ends of the second pivot hole 642. The operation pivot 60 passes through the cam portion 641 via a pair of annular coupling parts 647.

In one embodiment, the first return spring 62 is sleeved on the operating pivot 60 and between the rear side 743 of the mounting member 74 and the side wall of the recess 52 of the operating member 50. One end of the spring 62 abuts against the rear side wall 743 of the mounting 743, and the other end abuts against the side wall of the recess 52. In other embodiments, the end coupling position of the first return spring 62 is such that it can be twisted when the operating member 50 is rotated about the center axis of the operating pivot 60. The operating member 50 returns to the initial position by the torsion force of the first return spring 62.

The right side wall 745 of the mounting member 74 is provided with a support 76 parallel to the right side wall 745, and the right side wall 745 forms a space with the support 76. The support member 76 and the mounting member 74 may be integrally formed such that a support member 76 parallel to the right side wall 745 extends rightward from a lower end of the right side wall 745 as viewed in fig. 3-4. Alternatively, in other embodiments, the support 76 may be fixedly connected to the mounting member 74.

The hydraulic brake mechanism 40 includes a portion of the base frame 49 with the spring 72 disposed in the space. The laterally disposed springs 72 abut the support 76 on one side and the base 49 on the other side. The right side wall 745 of the mounting member 74 is formed with an aperture 744 and the base frame 49 and support member 76 are formed with corresponding apertures. The shift adjustment lever 74 can be passed through the support 76, the base frame 49 and the aperture in the right side wall 745 of the mounting member 74 in that order.

In one embodiment, the support member 76 is parallel to the upper portion of the right side wall 745, and the lower portion of the right side wall 745 extends downward and to the right and into the aforementioned space, and is shaped to have a slope parallel to the second leg 645 of the cam mechanism 64.

In one embodiment, the bicycle control device 10 further includes a pair of second annular coupling parts 78 and 79 each having a circular boss. Wherein, the circular convex part of the second annular connecting part 78 is matched with the hole on the base frame 49, the circular convex part of the second annular connecting part 79 is matched with the hole on the supporting piece 76, and the speed change adjusting rod 70 passes through the base frame 49 and the supporting piece 76 through the second annular connecting parts 78 and 79.

One end of the shift adjustment lever 70 is adjacent to the shift contact portion 36 of the shift control mechanism 30 and the other end is adjacent to the first leg 643 of the cam mechanism 64. The direction of extension of the shift adjustment lever 70 is parallel to the axis P1 of the shift pivot of the shift control mechanism 30 and the shift adjustment lever 70 is spaced from the shift pivot by a certain distance.

In one embodiment, the support 76 includes an upper portion 761 and a lower portion 763, the lower portion of which is bar-shaped and has an area smaller than that of the upper portion. The shift contact portion 36 of the shift control mechanism 30 extends through the support member 76, extends toward the spacing space, and is disposed adjacent to and spaced a distance from the side wall of the strip-shaped lower portion of the support member 76. Thus, the lower portion of the support 76 is shaped as the shift adjusting contact portion 763. Specifically, shift adjusting contact portion 763 of support member 76 is able to make intimate contact with shift contact portion 36 of shift control mechanism 30 when a shifting operation along the shift change path is performed by operating member 50, and is spaced a distance from shift contact portion 36 of shift control mechanism 30 when at rest (no operation is performed) or when a braking operation is performed by operating member 50.

During a shifting operation, the mounting member 74 and the support member 76 rotate about the axis of the shift adjustment lever 70 in the direction of the shifting shift path under the action of the operating member 50 such that the shift adjustment contact portion 763 abuts the shift contact portion 36, thereby causing the shift control mechanism 30 to rotate along the shifting shift path about the shift pivot axis P1 of the shift pivot shaft.

When the operating member 50 is operated to brake about the operating pivot shaft 60, the shift adjusting contact portion 763 does not contact the shift contact portion 36 and therefore does not carry the simultaneous shifting action.

In an embodiment of the present invention, when mounting member 74 and support member 76 rotate about the axis of shift adjustment lever 70 in the direction of the shift path, shift adjustment lever 70 does not contact shift control mechanism 30.

According to an alternative embodiment of the present invention, the hydraulic brake mechanism 40 may be fixedly attached to the base member 14 by, for example, screws or other similar attachment means. The hydraulic brake mechanism 40 and the piston 44 do not rotate when a shifting operation is performed.

Since the mounting member 74 is connected to the operating member 50 by the operating pivot 60, the movement path of the mounting member 74 increases as the movement path of the operating member 50 increases when the operating member 50 moves in the shifting direction about the axis of the shift adjustment lever 70.

As shown in fig. 6 and 7, when the user operates the operating member 50 to move about the shift adjustment lever 70 in the first and second shift path directions S1 and S2, the driving member 74 also moves about the central axis of the shift adjustment lever 70 in the first and second shift path directions S1 and S2, wherein the operating member 50 is shown in an initial position in phantom.

In this situation, the shift adjusting contact portion 763 of the support 76 abuts against the shift contact portion 36 of the shift control unit 30, thereby applying a force to the shift contact portion 36 to rotate the connecting member with the shift contact portion about the axis P1 of the shift pivot shaft, which in turn operatively rotates the winding member in the shift control mechanism 30 in the first shift path direction S1 (cable releasing direction) and the second shift path direction S2 (cable take-up direction) rotationally. The second shift speed change shift path direction S2 is greater than the stroke of the first shift speed change path direction S1.

In an alternative embodiment of the present invention, a second return spring 72 is wound around the shift adjusting lever 70. The end coupling position of the second return spring 72 is such that it can be twisted when the mounting member 74 is rotated about the center axis of the shift adjustment lever 70. When the gear shifting is finished, the hand force is relaxed, and the mounting member 74 returns to the initial position under the torsion of the second return spring 72 due to no application of the hand force, so as to drive the operating member 50 connected with the mounting member 74 to return to the initial position.

As seen in fig. 8, when the operating member 50 is operated to perform a braking movement in the brake path direction B about the operating pivot shaft 60, the second branch 645 of its operating handle and cam mechanism 64 rotates in a direction closer to the shift contact portion 36 but does not contact the shift contact portion 36. The first leg 643 of the cam mechanism 64 rotates about the operation pivot 60 in the direction of the cylinder 42, and the first leg 643, which is in direct contact with the top end of the second portion 44b of the piston, applies a pushing force to the piston 44 so that the piston travels linearly along the cylinder wall of the compression cylinder 42 toward the bottom of the compression cylinder 42. In the present embodiment, the brake path direction B is a circumferential direction defined about the axis of the operating pivot 60.

When the piston 44 is driven to move linearly along the cylinder wall of the compression cylinder 42, the piston return spring 46 is compressed, and when the force of the cam mechanism 64 on the piston 44 is removed, the piston return spring 46 applies a pushing force to the piston 44, so that the piston 44 returns to the original position, the fluid flows back to the compression cylinder 42 from the hydraulic pipe 48, the brake member on the wheel is released from the pressure to loosen the wheel, and the wheel is allowed to continue rotating.

When the user's force is removed from the operating member 50, the operating member 50 returns to the original position under the force of the spring 62 for the next braking.

In a further embodiment, the oil cylinder 42 communicates with a hydraulic tube 48 through a hydraulic passage provided in the hydraulic brake mechanism 40, a portion of the hydraulic tube 48 is provided in the base member 14, and the remaining portion of the hydraulic tube 48 extends from the base member 14 toward the braking members of the wheels.

In the embodiment of the present invention, the lower portion of the right side wall 745 of the mounting member 74 and the shift contact portion 36 are disposed at a distance, and the upper portion of the right side wall 745 of the mounting member 74 and the shift adjustment lever 70 are rotatably connected in the axial direction of the shift adjustment lever 70, so that the upper portion of the mounting member 74 is restrained from rotating in the piston direction and the lower portion from rotating in the shift contact portion 36 direction, and therefore, when the brake operation is performed by the operating member 50 of the bicycle control device, the mounting member 74 and the supporting member 76 are not easily caused to rotate in the shift direction around the central axis of the shift adjustment lever 70, so that the erroneous operation of shifting can be avoided. In the present embodiment, the mounting member 74 remains stationary relative to the base member 14 and does not rotate when the operating member 50 is moved in the direction of the braking path about the axis of the operating pivot 60.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (10)

1. A bicycle control device, comprising:

a base member (14) mounted to the bicycle through a fitting member (12);

a hydraulic brake mechanism (40) fixedly disposed within the base member (14), the hydraulic brake mechanism (40) including a hydraulic cylinder (42) and a piston (44) movable within the hydraulic cylinder (42), the hydraulic cylinder (42) being in fluid communication with a hydraulic line (48) coupled to a brake member of a wheel, a portion of the piston (44) being disposed outside of the hydraulic cylinder (42), characterized in that the bicycle control device further comprises:

a cam mechanism (64), the cam mechanism (64) including a cam portion (641) and a first leg (643) extending upward from the cam portion (641), the first leg (643) being in direct contact with an end of the piston (44) located outside the hydraulic cylinder (42);

an operating member (50), the operating member (50) being pivotally connected to the cam portion (641) by an operating pivot (60);

wherein when the operating member (50) moves in a braking path direction under a braking operation, the first leg (643) of the cam mechanism (64) applies a pushing force to the piston (44) by the operating pivot (60) so that the piston (44) linearly moves inward along the cylinder wall of the hydraulic cylinder (42).

2. The bicycle control apparatus of claim 1, wherein the end of the piston (44) is a flat end, and a face of the first leg (643) of the cam mechanism (64) that directly contacts the flat end is planar.

3. The bicycle control apparatus of claim 1, wherein the first support member (643) of the cam mechanism (64) has a U-shaped slot (644) formed at an upper end thereof, the cam mechanism (64) further including a bearing member (65), the bearing member (65) being rotatably mounted within the U-shaped slot (644) by a coupling pin (66);

the end of the piston (44) is a flat end, and the bearing member (65) is in direct contact with the flat end.

4. The bicycle control apparatus of claim 1, wherein the piston (44) includes a first portion (44 a) located within the hydraulic cylinder (42) and a second portion (44 b) located within the hydraulic tube (48), the first portion (44 a) and the second portion (44 b) being integrally formed or fixedly connected.

5. The bicycle control device according to claim 1, further comprising:

a shift control mechanism (30) disposed within the base member (14) and rotatable about a pivot axis of a shift pivot shaft, the shift control mechanism (30) including a downwardly extending shift contact portion (36),

a mounting structure, the mounting structure comprising:

a mounting member (74), the mounting member (74) being a U-shaped member transversely disposed and open toward the piston (44) and having a front side wall (741), a rear side wall (743) and a right side wall (745);

a support member (76) arranged in parallel with the right side wall (745) and forming a spaced space with the right side wall, the support member (76) being fixed with the mounting member (74);

wherein the cam portion (641) is disposed between the front side wall (741) and the rear side wall (743), and the operating pivot (60) is pivotally connected to the mounting member (74) and extends through an upper end portion of the operating member (50), the front and rear side walls of the mounting member (74), and the cam portion (641);

a shift adjustment lever (70), said shift adjustment lever (70) extending through said mounting member (74) and said support member (76), and said mounting structure being rotatably coupled to said shift adjustment lever (70), and said shift adjustment lever (70) being parallel to said shift pivot axis;

the lower end of the shift contact (36) extends through the support (76) into the spacing space and is spaced from the front side of the support (76) by a spacing distance;

when the operating member (50) is moved in a direction of a shift path under a shifting operation, the mounting structure together with the operating member (50) is rotatable about the axis of the shift adjustment lever (70) such that the support member (76) is rotated to abut the shift contact portion (36) and thereby bring the shift control mechanism (30) to rotate about the pivot axis of the shift pivot.

6. The bicycle control device according to claim 5, wherein said support (76) comprises an upper portion (761) and a strip-shaped lower portion (763) narrower than said upper portion (761), wherein a shift contact (36) of said shift control mechanism (30) is arranged to pass from below said upper portion (761) and to be spaced from a front side of said lower portion (763) by a spatial distance;

the shift adjustment lever (70) extends through a right side wall (745) of the mounting member (74) and an upper portion (761) of the support member (76).

7. The bicycle control device of claim 5, wherein:

the upper end portion of the operating member (50) is provided with a recess (52), groove walls on both sides of the recess (52) are opened with a pair of pivot holes, a front side wall (741) and a rear side wall (743) of the mounting member (74) are partially disposed in the recess (52) and are also opened with a pair of pivot holes, and the cam portion (641) between the front side wall (741) and the rear side wall (743) of the mounting member (74) is opened with a pivot hole, wherein the operating pivot (60) extends through the recess wall of the operating member (50), the front and rear side walls of the mounting member (74), and the cam portion (641); and/or the presence of a gas in the gas,

the cam mechanism (64) includes a second branch piece (645) extending in a right-down direction from the cam portion (641), the second branch piece (645) coinciding with a grip direction of the operating member (50).

8. The bicycle control device according to claim 5, further comprising a first return spring (62) that is sleeved on the operating pivot (60) and a second return spring (72) that is sleeved on the shift adjustment lever (70), wherein the first return spring (62) is arranged to enable the operating member (50) to return to an initial position under a torsion force of the first return spring (62), and the second return spring (72) is arranged to enable the mounting structure and the operating member (50) to return to an initial position under a torsion force of the second return spring (72); or the like, or, alternatively,

the hydraulic brake mechanism (40) has a portion of a base frame (49) disposed within the spaced-apart space, and the shift adjustment lever (70) also extends through the base frame (49).

9. A bicycle control device, comprising:

a base member (14);

a shift control mechanism (30) disposed within the base member (14) and rotatable about a pivot axis of a shift pivot shaft in a shift path direction, the shift control mechanism (30) including a shift contact portion (36) extending downwardly;

a hydraulic brake mechanism (40) disposed inside the base member (14), the hydraulic brake mechanism (40) including a cylinder (42) and a piston (44) movable within the cylinder (42), a portion of the piston (44) being located outside the cylinder (42); and the number of the first and second groups,

an operating member (50) operable to perform shifting and braking operations;

characterized in that, the bicycle control device further comprises:

a cam mechanism (64), the cam mechanism (64) including a cam portion (641) and a first leg (643) extending upward from the cam portion (641), the first leg (643) being in direct contact with an end of the piston (44) located outside the hydraulic cylinder (42);

a mounting structure including a U-like mounting member opening toward the piston, the mounting member including a front side wall, a rear side wall, and a right side wall, the cam portion (641) being disposed between the front side wall and the rear side wall of the U-like mounting member;

an operation pivot (60) which rotatably connects the upper end portion of the operation member (50) and the front and rear side walls of the mounting member and the cam portion (641) to the operation pivot (60);

a shift adjustment lever (70) parallel to the shift pivot axis and extending through a right side wall of the mounting member such that the mounting structure is rotatably connected to the shift adjustment lever (70); and the combination of (a) and (b),

the mounting arrangement further comprises a shift adjustment contact extending from a right side wall of the U-shaped mounting member, the shift adjustment contact being arranged to be spaced a spatial distance from the shift contact (36) when the operating member (50) is in the initial position, and to bring the mounting arrangement together to rotate about the axis of the shift adjustment lever (70) against the shift contact (36) and thereby cause the shift control mechanism (30) to rotate about the pivot axis of the shift pivot when the operating member (50) is moved in the direction of the shift path.

10. The bicycle control apparatus of claim 9, wherein the end of the piston (44) is a flat end; and (c) a second step of,

when the operating member (50) moves in a braking path direction under a braking operation, the first leg (643) of the cam mechanism (64) applies a pushing force to the flat end portion of the piston (44) so that the piston (44) linearly moves inward along the cylinder wall of the hydraulic cylinder (42).

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