Hydraulic operating device for human-powered vehicle

Abstract

A hydraulic operating device includes a base member, a piston, a reservoir, an operating member, and a delay structure. The piston includes a piston body and a first sealing ring. The base member includes a first connecting hole configured to connect the reservoir chamber and a cylinder chamber. In an initial state where the piston is in an initial position, the first sealing ring is configured to be in a connected position, in which the cylinder chamber communicates with the reservoir chamber through the first connecting hole. The first sealing ring is also configured to be in a disconnected position, in which it disconnects the cylinder chamber from the reservoir chamber. The delay structure is configured to delay the return of the first sealing ring from the disconnected position to the connected position as the piston returns to the initial position.

Description

Technical Field

[0001] This invention relates to a hydraulic operating device for human-powered vehicles. Prior Technology

[0002] A human-powered vehicle includes a hydraulic unit provided in an operating device. The hydraulic unit includes a cylinder bore, a piston, and a reservoir chamber. The piston is movably provided in the cylinder bore. The piston and cylinder bore form a hydraulic chamber. The reservoir chamber is in fluid communication with the hydraulic chamber through a connecting hole. The piston includes a sealing member. In a static state, the sealing member is in a position where the hydraulic chamber communicates with the reservoir chamber via the connecting hole. In an actuated state, the sealing member is in a position where it disconnects the hydraulic chamber from the reservoir chamber. Summary of the Invention

[0003] According to a first aspect of the invention, a hydraulic operating device for a human-powered vehicle includes a base member, a piston, a reservoir, an operating member, and a delay structure. The base member includes a cylinder bore. A piston is movably provided in the cylinder bore. The base member and the piston define a cylinder chamber within the cylinder bore. The piston includes a piston body and a first sealing ring provided to the piston body. The reservoir includes a reservoir chamber. The base member includes a first connecting hole configured to connect the reservoir chamber and the cylinder chamber. The operating member is coupled to the piston to move the piston relative to the base member between an initial position and an actuated position in response to movement of the operating member relative to the base member between a rest position and an operating position. In an initial state where the piston is in the initial position, the first sealing ring is configured to be in a connected position, in which the cylinder chamber communicates with the reservoir chamber through the first connecting hole. The first sealing ring is configured to be in a disconnected position, in which the first sealing ring disconnects the cylinder chamber from the reservoir chamber. The delay structure is configured to delay the return of the first sealing ring from the disconnected position to the connected position as the piston returns to the initial position.

[0004] According to the hydraulic operating device of the first aspect, when the piston returns to the initial position, the delay structure is able to provide sufficient pressure in the cylinder chamber.

[0005] According to a second aspect of the invention, the hydraulic operating device according to the first aspect is configured such that a delay structure is provided in the cylinder bore.

[0006] By using the hydraulic operating device according to the second aspect, the same or similar dimensions of the hydraulic operating device can be maintained.

[0007] According to a third aspect of the invention, the hydraulic operating device according to the first or second aspect is configured such that a delay structure is mounted on the piston.

[0008] By using the hydraulic operating device according to the third aspect, the same or similar dimensions of the hydraulic operating device can be maintained.

[0009] According to a fourth aspect of the invention, the hydraulic operating device according to any one of the first to third aspects is configured such that the delay structure includes a delay biasing member configured to bias the first sealing ring toward the cylinder chamber when the piston returns to the initial position.

[0010] According to the hydraulic operating device of the fourth aspect, it is possible to delay the timing of the first sealing ring returning from the disconnected position to the connected position with a relatively simple structure.

[0011] According to a fifth aspect of the invention, the hydraulic actuation device according to the fourth aspect is configured such that the piston body includes a first piston body and a second piston body. The first piston body is coupled to the actuating member to receive movement of the actuating member. The second piston body is movably provided on the first piston body. The first sealing ring is provided to the first piston body. The delayed biasing member is configured to bias the first piston body relative to the second piston body toward the cylinder chamber.

[0012] According to the hydraulic operating device of the fifth aspect, the timing of the first sealing ring returning from the disconnected position to the connected position can be delayed by changing the structure of the piston body.

[0013] According to a sixth aspect of the invention, the hydraulic operating device according to the fifth aspect is configured such that the delay structure is configured to change the relative position between the first piston body and the second piston body when the piston returns to the initial position.

[0014] According to the hydraulic operating device of the sixth aspect, the timing of the first sealing ring returning from the disconnected position to the connected position can be reliably delayed by changing the structure of the piston body.

[0015] According to a seventh aspect of the invention, the hydraulic operating device according to the sixth aspect is configured such that the delay structure is configured to change its relative position as the piston moves from the initial position to the actuated position.

[0016] According to the hydraulic operating device of the seventh aspect, as the piston moves from the initial position toward the actuated position, the first sealing ring can be moved from the connected position to the disconnected position relatively quickly.

[0017] According to an eighth aspect of the invention, the hydraulic operating device according to any one of the fifth to seventh aspects is configured such that the second piston body includes an attachment hole. The first piston body is partially and movably provided in the attachment hole.

[0018] According to the hydraulic operating device of the eighth aspect, the first piston body and the second piston body can be movably coupled without increasing the size of the piston body.

[0019] According to a ninth aspect of the invention, the hydraulic operating device according to the eighth aspect is configured such that a delayed biasing member is provided in the attachment hole.

[0020] According to the hydraulic operating device of the ninth aspect, the delay structure can be realized without increasing the size of the piston body.

[0021] According to a tenth aspect of the invention, the hydraulic operating device according to any one of the fifth to ninth aspects is configured such that the delayed bias member includes a helical spring.

[0022] According to the hydraulic operating device of the tenth aspect, the delay structure can be realized at a relatively low cost.

[0023] According to the eleventh aspect of the invention, the hydraulic operating device according to any one of the fifth to tenth aspects is configured such that the piston includes a sealing member provided between the first piston body and the second piston body.

[0024] According to the hydraulic operating device of the eleventh aspect, the gap between the first piston body and the second piston body can be sealed.

[0025] According to a twelfth aspect of the invention, the hydraulic operating device according to any one of the fifth to eleventh aspects is configured such that the piston includes a limiting structure configured to limit the relative movement of the first piston body and the piston body toward the cylinder chamber.

[0026] According to the hydraulic operating device of the twelfth aspect, under the condition that the relative movement of the first piston body is restricted by the limiting structure, the second piston body can be moved together with the first piston body toward the cylinder chamber.

[0027] According to a thirteenth aspect of the invention, the hydraulic operating device according to any one of the fifth to twelfth aspects further includes a reset biasing member configured to bias the piston toward an initial position. The biasing force of the reset biasing member is greater than the biasing force of the delayed biasing member.

[0028] According to the hydraulic operating device of aspect thirteen, a reset biasing member can be used to return the piston body to its initial position.

[0029] According to a fourteenth aspect of the invention, the hydraulic operating device according to any one of the fifth to thirteenth aspects is configured such that the piston includes a second sealing ring provided to the second piston body.

[0030] According to the hydraulic operating device of aspect fourteen, the second sealing ring can improve the sealing performance of the piston.

[0031] According to a fifteenth aspect of the invention, the hydraulic operating device according to any one of the first to thirteenth aspects is configured such that the piston includes a second sealing ring provided to the piston body.

[0032] According to the hydraulic operating device of aspect fifteen, the second sealing ring can improve the sealing performance of the piston.

[0033] According to a sixteenth aspect of the invention, the hydraulic operating device according to the fifteenth aspect is configured such that the delay structure is configured to change the distance between the first sealing ring and the second sealing ring as the piston returns to the initial position.

[0034] According to the hydraulic operating device of the sixteenth aspect, by changing the distance between the first sealing ring and the second sealing ring, the timing of the first sealing ring returning from the disconnected position to the connected position can be reliably delayed.

[0035] According to a seventeenth aspect of the invention, the hydraulic operating device according to the sixteenth aspect is configured such that the delay structure is configured to change the distance between the first sealing ring and the second sealing ring as the piston moves from the initial position to the driving position.

[0036] Using the hydraulic operating device according to the seventeenth aspect, as the piston moves from the initial position toward the actuated position, the first sealing ring can be moved from the connected position to the disconnected position relatively quickly.

[0037] According to the eighteenth aspect of the invention, the hydraulic operating device according to any one of the first to seventeenth aspects is configured such that the base member includes a second connecting hole configured to connect the reservoir chamber to an intermediate space provided between the inner peripheral surfaces of the piston and the cylinder bore.

[0038] Using the hydraulic operating device according to aspect eighteen, the piston body can be smoothly moved from the initial position to the actuated position.

[0039] According to a nineteenth aspect of the invention, the hydraulic operating device according to the eighteenth aspect is configured such that a first sealing ring is provided between a first connecting hole and a second connecting hole when the first sealing ring is in a connected position.

[0040] Using the hydraulic operating device according to the nineteenth aspect, the reservoir can adjust the pressure in the cylinder chamber and the intermediate space while the piston is in the initial position. Simple Explanation of the Diagram

[0041] When considered in conjunction with the accompanying drawings, the invention and its many accompanying advantages will be better understood by referring to the following detailed description, and thus a more complete understanding of the invention and its many accompanying advantages will be readily obtained.

[0042] [Figure 1] is a plan view of a portion of a human-powered vehicle including a hydraulic operating device according to an embodiment.

[0043] [Figure 2] is a cross-sectional view of the hydraulic operating device taken along line II-II of Figure 1.

[0044] [Figure 3] is a cross-sectional view of the hydraulic operating device taken along line III-III of Figure 1.

[0045] [Figure 4] is a partial cross-sectional view (initial state) of the hydraulic operating device shown in Figure 1.

[0046] [Figure 5] is a partial cross-sectional view (intermediate state) of the hydraulic operating device shown in Figure 1.

[0047] [Figure 6] is a partial cross-sectional view (start-up state) of the hydraulic operating device shown in Figure 1.

[0048] [Figure 7] is a partially enlarged sectional view of the hydraulic operating device shown in Figure 1.

[0049] [Figure 8] is a cross-sectional view of the hydraulic operating device taken along line VIII-VIII of Figure 1.

[0050] [Figure 9] is a partial sectional view of the hydraulic operating device according to a modified example.

[0051] [Figure 10] is a partial cross-sectional view of a hydraulic operating device according to another variation.

[0052] [Figure 11] is a partially enlarged cross-sectional view of a hydraulic operating device according to another variation. Implementation

[0053] The embodiments will now be described with reference to the drawings, wherein the same element symbols in the various drawings represent corresponding or identical elements.

[0054] As shown in Figure 1, the hydraulic operating device 10 for the human-powered vehicle 2 includes a base member 12 and an operating member 14. The operating member 14 is movably coupled to the base member 12. The hydraulic operating device 10 is configured to be mounted to the handlebars 3 of the human-powered vehicle 2. The hydraulic operating device 10 is configured to be connected to a hydraulically operated device 4 via a hydraulic hose 6. In this embodiment, the hydraulically operated device 4 includes a disc brake caliper. However, the hydraulically operated device 4 is not limited to a disc brake caliper.

[0055] For example, a human-powered vehicle 2 is a vehicle that is powered by the human strength of at least one user (i.e., a rider) riding in the human-powered vehicle 2. The human-powered vehicle 2 has any number of wheels. For example, a human-powered vehicle 2 has at least one wheel. In this embodiment, the human-powered vehicle 2 preferably has a smaller size than a four-wheeled automobile. However, the human-powered vehicle 2 can have any size. For example, the human-powered vehicle 2 can have a larger size than a four-wheeled automobile. Examples of human-powered vehicles 2 include bicycles, tricycles, and scooters. In this embodiment, the human-powered vehicle 2 is a bicycle. An electric assistance system, including an electric motor, can be applied to the human-powered vehicle 2 (e.g., a bicycle) to assist the user's muscle power. That is, the human-powered vehicle 2 can be an electric bicycle.

[0056] Operating member 14 is pivotally coupled to base member 12 about pivot axis A1. Operating member 14 can pivot relative to base member 12 about pivot axis A1 between stationary position P11 and operating position P12.

[0057] In this application, the term "stationary position" as used herein refers to a position in which a movable part, such as the operating member 14, remains stationary when the movable part is not operated by the user. The term "operating position" as used herein refers to a position in which the user operates the movable part to perform the operation of the hydraulically operated device 4.

[0058] The hydraulic operating device 10 also includes a mounting member 18. The mounting member 18 is configured to couple the base member 12 to the handlebar 3. In this embodiment, the mounting member 18 includes a clamping structure. However, the structure of the mounting member 18 is not limited to a clamping structure.

[0059] As shown in Figure 2, the base member 12 includes a cylinder bore 20. The cylinder bore 20 has a cylinder central axis A2. The cylinder bore 20 extends along the cylinder central axis A2. The hydraulic operating device 10 for the human-powered vehicle 2 includes a piston 22. The piston 22 is movably provided in the cylinder bore 20. The base member 12 and the piston 22 define a cylinder chamber 24 in the cylinder bore 20. The cylinder chamber 24 is configured to be filled with a hydraulic fluid such as oil. The piston 22 can move relative to the base member 12 in a direction of movement D1 parallel to the cylinder central axis A2 between an initial position P21 and an actuated position P22.

[0060] The operating member 14 is coupled to the piston 22 to move the piston 22 relative to the base member 12 between the initial position P21 and the actuated position P22 in response to the movement of the operating member 14 relative to the base member 12 between the rest position P11 and the operating position P12.

[0061] The operating member 14 is coupled to the piston 22 so that, in response to the movement of the operating member 14 relative to the base member 12 from the stationary position P11 to the operating position P12, the piston 22 is moved relative to the base member 12 from the initial position P21 to the actuated position P22 in the first movement direction D11.

[0062] As shown in Figure 3, the hydraulic operating device 10 includes a piston rod 25. The piston rod 25 is provided between the operating member 14 and the piston 22 to transmit the motion of the operating member 14 and the piston 22 to each other. The piston rod 25 includes a first rod end 25A and a second rod end 25B. The first rod end 25A is pivotally coupled to the piston 22. The second rod end 25B is movably supported by a base member 12. The second rod end 25B contacts the operating member 14.

[0063] The operating member 14 includes a lever 14A, a transmission member 14B, an adjusting structure 14C, and a lever biasing member 14D. The lever 14A is coupled to the transmission member 14B via the adjusting structure 14C. The transmission member 14B contacts the piston rod 25 to transmit the movement of the operating member 14. The lever biasing member 14D is configured to bias the transmission member 14B to maintain contact with the piston rod 25. The lever biasing member 14D includes a torsion coil spring. The adjusting structure 14C is configured to change the orientation of the lever 14A relative to the transmission member 14B. Therefore, the adjusting structure 14C is configured to change the resting position P11 of the operating member 14 (see, for example, Figure 1).

[0064] Piston 22 includes piston body 26 and a first sealing ring 28 provided to piston body 26. Piston 22 includes a second sealing ring 30. The second sealing ring 30 is provided to piston body 26. The second sealing ring 30 is spaced apart from the first sealing ring 28 in the movement direction D1. Piston body 26 includes a first groove 32 and a second groove 34. The first groove 32 has an annular shape. The first groove 34 has an annular shape. The first sealing ring 28 is provided to the first groove 32. The second sealing ring 30 is provided to the second groove 34. The first sealing ring 28 may also be referred to as sealing ring 28. The first sealing ring 30 may also be referred to as sealing ring 30.

[0065] As shown in Figure 2, the hydraulic operating device 10 also includes a reset biasing member 35. The reset biasing member 35 is configured to bias the piston 22 toward the initial position P21. The reset biasing member 35 is provided in the cylinder chamber 24. The reset biasing member 35 is configured to be compressed when the piston 22 is in the initial position P21, such that the reset biasing member 35 continuously biases the piston 22 in a second movement direction D12 to position the piston 22 at the initial position P21. The second movement direction D12 is the opposite direction to the first movement direction D11. The first movement direction D11 and the second movement direction D12 are parallel to the movement direction D1. In this embodiment, the reset biasing member 35 includes a helical spring. However, the reset biasing member 35 may include other components.

[0066] The hydraulic operating device 10 for the human-powered vehicle 2 includes a reservoir 36. The reservoir 36 includes a reservoir chamber 38. The reservoir chamber 38 is configured to be filled with hydraulic fluid. In this embodiment, the reservoir 36 includes a reservoir orifice 40, a diaphragm 41, a cover 42, and a drain plug 44. The reservoir orifice 40 is provided to a base member 12. The diaphragm 41 is provided in the reservoir orifice 40 to define the reservoir chamber 38 within the reservoir orifice 40. The diaphragm 41 is made of an elastic material such as rubber. The diaphragm 41 is configured to allow for a variable volume of the reservoir chamber 38. The cover 42 is threaded into a threaded hole 40A of the reservoir orifice 40. The base member 12 includes a drain orifice 46. The drain plug 44 is threaded into the drain orifice 46.

[0067] The base member 12 includes a first connecting hole 48. The first connecting hole 48 is configured to connect the reservoir chamber 38 and the cylinder chamber 24. The base member 12 includes a second connecting hole 50. The second connecting hole 50 is configured to connect the reservoir chamber 38 to an intermediate space 51 provided between the piston 22 and the inner circumferential surface 20A of the cylinder bore 20. The second connecting hole 50 is spaced apart from the first connecting hole 48 in the movement direction D1 (here, in the second movement direction). The intermediate space 51 is defined by the piston 22, the inner circumferential surface 20A of the cylinder bore 20, a first sealing ring 28, and a second sealing ring 30. The first sealing ring 28 separates the cylinder chamber 24 and the intermediate space 51.

[0068] In this embodiment, the base component 12 includes a third connecting hole 52 and a fourth connecting hole 54. A first connecting hole 48 connects the cylinder bore 20 to the third connecting hole 52. A second connecting hole 50 connects the cylinder bore 20 to the third connecting hole 52. The fourth connecting hole 54 connects the third connecting hole 52 to the reservoir chamber 38. The hydraulic operating device 10 includes a plug 56. The plug 56 is attached to the end of the third connecting hole 52 to close the end of the third connecting hole 52. The cylinder bore 20 is connected to the reservoir chamber 38 through the first connecting hole 48, the third connecting hole 52, and the fourth connecting hole 54.

[0069] As shown in Figure 4, in the initial state where the piston 22 is in the initial position P21, the first sealing ring 28 is configured to be in the connection position P31. In the connection position P31, the cylinder chamber 24 communicates with the reservoir chamber 38 through the first connection hole 48. When the first sealing ring 28 is in the connection position P31, the cylinder chamber 24 communicates with the reservoir chamber 38 through the first connection hole 48, the third connection hole 52, and the fourth connection hole 54.

[0070] The first sealing ring 28 is configured to be provided between the first connecting hole 48 and the second connecting hole 50 when the first sealing ring 28 is in the connected position P31. The first connecting hole 48 includes a first end opening 48A provided on the inner circumferential surface 20A of the cylinder bore 20. The second connecting hole 50 includes a second end opening 50A provided on the inner circumferential surface 20A of the cylinder bore 20. The first sealing ring 28 includes a contact portion 28A that contacts the inner circumferential surface 20A of the cylinder bore 20. The contact portion 28A of the first sealing ring 28 is configured to be provided between the first end opening 48A of the first connecting hole 48 and the second end opening 50A of the second connecting hole 50 when the first sealing ring 28 is in the connected position P31. Therefore, when the first sealing ring 28 is in the connected position P31, the intermediate space 51 communicates with the reservoir chamber 38 via the second connecting hole 50. When the first sealing ring 28 is in the connected position P31, the first sealing ring 28 disconnects the cylinder chamber 24 from the second connecting hole 50. When the first sealing ring 28 is in the connected position P31, the first sealing ring 28 disconnects the intermediate space 51 from the first connecting hole 48.

[0071] As shown in Figure 5, the first sealing ring 28 is configured to be in the disconnected position P33, in which the first sealing ring 28 disconnects the cylinder chamber 24 from the reservoir chamber 38. The second connecting hole 50 is provided between the first sealing ring 28 and the second sealing ring 30 in the movement direction D1. With the first sealing ring 28 in the disconnected position P33, the first connecting hole 48 is provided between the first sealing ring 28 and the second connecting hole 50. The contact portion 28A of the first sealing ring 28 is configured to be provided between the first end opening 48A of the first connecting hole 28 and the second end opening 50A of the second connecting hole 50 when the first sealing ring 28 is in the disconnected position P33. Therefore, with the first sealing ring 28 in the disconnected position P33, the intermediate space 51 communicates with the reservoir chamber 38 via the first connecting hole 48 and the second connecting hole 50. With the first sealing ring 28 in the disconnected position P33, the first connecting hole 48 does not connect the cylinder chamber 24 and the reservoir chamber 38.

[0072] With piston 22 in the intermediate position P23, the first sealing ring 28 is in the open position P33. The intermediate position P23 is defined between the initial position P21 and the actuated position P22 in the movement direction D1. The intermediate position P23 is closer to the initial position P21 than the actuated position P22.

[0073] As shown in Figure 1, with the operating member 14 in the intermediate operating position P13, the piston 22 is in the intermediate position P23. The intermediate operating position P13 is defined between the rest position P11 and the operating position P12. The intermediate operating position P13 is closer to the rest position P11 than the operating position P12.

[0074] As seen in Figures 5 and 6, the first sealing ring 28 is configured in an additional disconnect position P32, in which the first sealing ring 28 disconnects the cylinder chamber 24 from the reservoir chamber 38. The disconnect position P33 is defined between the connected position P31 and the additional disconnect position P32 in the direction of movement D1. The disconnect position P33 is closer to the connected position P31 than the additional disconnect position P32. When the piston 22 is in the actuated state of the actuated position P22, the first sealing ring 28 is in the additional disconnect position P32.

[0075] The distance DS31 between the connecting position P31 and the additional disconnecting position P32 in the movement direction D1 is equal to the distance DS21 between the initial position P21 and the actuation position P22 in the movement direction D1. The distance DS31 between the connecting position P31 and the additional disconnecting position P32 in the movement direction D1 is longer than the distance DS32 between the connecting position P31 and the disconnecting position P33 in the movement direction D1.

[0076] As seen in Figures 4 to 6, the hydraulic operating device 10 for the human-powered vehicle 2 includes a delay structure 60. The delay structure 60 is configured to delay the timing of the return of the first sealing ring 28 from the disconnected position P33 to the connected position P31 as the piston 22 returns to the initial position P21.

[0077] In this embodiment, the delay structure 60 is provided in the cylinder bore 20. The delay structure 60 is mounted on the piston 22. However, the delay structure 60 can be provided outside the cylinder bore 20. If needed and / or desired, the delay structure 60 can be provided to components other than the piston 22.

[0078] The delay structure 60 includes a delay biasing member 62. The delay biasing member 62 is configured to bias the first sealing ring 28 toward the cylinder chamber 24 when the piston 22 returns to the initial position P21. In this embodiment, the delay biasing member 62 includes a coil spring. However, the structure of the delay biasing member 62 is not limited to a coil spring. If needed and / or desired, the delay biasing member 62 may include other members, such as elastic members (e.g., rubber), in place of or attached to the coil spring.

[0079] As shown in Figure 4, the piston body 26 includes a first piston body 64 and a second piston body 66. The first piston body 64 is coupled to the operating member 14 to receive movement of the operating member 14. A first rod end 25A of the piston rod 25 is coupled to the first piston body 64 to transmit movement of the operating member 14 to the first piston body 64. The second piston body 66 is movably provided on the first piston body 64. A first sealing ring 28 is provided to the first piston body 64. A second sealing ring 30 is provided on the second piston body 66. In this embodiment, the first piston body 64 includes a first groove 32. The second piston body 66 includes a second groove 34. However, the first groove 32 may be provided on a component other than the first piston body 64. The second groove 34 may be provided on a component other than the second piston body 66.

[0080] The second piston body 66 includes an attachment hole 68. The first piston body 64 is partially and movably provided in the attachment hole 68. The piston 22 includes a sealing member 70 provided between the first piston body 64 and the second piston body 66. The sealing member 70 has an annular shape. The sealing member 70 is provided in the attachment hole 68. The second piston body 66 includes an inner groove 72. The sealing member 70 is provided in the inner groove 72.

[0081] The attachment hole 68 includes a first attachment hole 74, a second attachment hole 76, and an intermediate attachment hole 78. The first attachment hole 74 has a first inner diameter DM11. The second attachment hole 76 has a second inner diameter DM12. The intermediate attachment hole 78 has a third inner diameter DM13. The third inner diameter DM13 is different from the first inner diameter DM11 and the second inner diameter DM12. In this embodiment, the second inner diameter DM12 is equal to the first inner diameter DM11. The first inner diameter DM11 and the second inner diameter DM12 are larger than the third inner diameter DM13. Therefore, the second piston body 66 includes a stepped member 79 provided between the first attachment hole 74 and the second attachment hole 76.

[0082] The first piston body 64 includes a first component 80, a second component 82, and an intermediate component 84. A first sealing ring 28 is attached to the first component 80. The first component 80 includes a first groove 32. The intermediate component 84 includes a first end 84A and a second end 84B. The intermediate component 84 extends along the cylinder central axis A2 between the first end 84A and the second end 84B. The first component 80 is provided at the first end 84A of the intermediate component 84. The second component 82 is provided at the second end 84B of the intermediate component 84. The first component 80 is provided in a first attachment hole 74. The second component 82 is provided in a second attachment hole 76. The intermediate component 84 is provided in an intermediate attachment hole 78.

[0083] In this embodiment, the first component 80 is a separate member from the second component 82 and the intermediate component 84. The first component 80 is fixed to a first end 84A of the intermediate component 84. The second component 82 is integrally provided with the intermediate component 84 as a one-piece integral member. However, if needed and / or desired, the first component 80 may be integrally provided with the intermediate component 84 as a one-piece integral member. If needed and / or desired, the second component 82 may be a separate member from the intermediate component 84.

[0084] The first component 80 has a first outer diameter DM21. The second component 82 has a second outer diameter DM22. The intermediate component 84 has a third outer diameter DM23. The third outer diameter DM23 is different from the first outer diameter DM21 and the second outer diameter DM22. The second outer diameter DM22 is different from the first outer diameter DM21. In this embodiment, the first outer diameter DM21 is larger than the second outer diameter DM22 and the third outer diameter DM23. The second outer diameter DM22 is larger than the third outer diameter DM23. The first outer diameter DM21 and the second outer diameter DM22 are larger than the third inner diameter DM13 of the intermediate attachment hole 78.

[0085] As shown in Figure 5, the piston 22 includes a limiting structure 88 configured to limit the relative movement of the first piston body 64 and the second piston body 66 toward the cylinder chamber 24. The limiting structure 88 is configured to limit the movement of the first piston body 64 relative to the second piston body 66 toward the cylinder chamber 24. The limiting structure 88 includes a first limiting surface 90 and a second limiting surface 92. In this embodiment, the first limiting surface 90 is provided on a second component 82 of the first piston body 64. The second limiting surface 92 is provided on the second piston body 66. The second limiting surface 92 is provided on a stepped component 79. However, if needed and / or desired, the first limiting surface 90 may be provided to a component other than the first piston body 64. If needed and / or desired, the second limiting surface 92 may be provided to a component other than the second piston body 66.

[0086] The second limiting surface 92 may contact the first limiting surface 90 to limit the relative movement of the first piston body 64 relative to the second piston body 66 toward the cylinder chamber 24. The first limiting surface 90 is configured to face the second limiting surface 92. The second limiting surface 92 is configured to face the first limiting surface 90. When the first sealing ring 28 is in the open position P33, the second limiting surface 92 is in contact with the first limiting surface 90.

[0087] As shown in Figure 4, when the operating member 14 is in the stationary position P11, the second limiting surface 92 is spaced apart from the first limiting surface 90 by a delay distance DT1. The delay distance DT1 is equal to the distance DS32 defined between the connected position P31 and the disconnected position P33 (see, for example, Figures 5 and 6).

[0088] In this embodiment, the first limiting surface 90 has an annular shape. The second limiting surface 92 has an annular shape. However, the structures of the first limiting surface 90 and the second limiting surface 92 are not limited to the structures described above.

[0089] The restraining structure 88 is configured to restrict the movement of the second piston body 66 relative to the first piston body 64 toward the cylinder chamber 24. The restraining structure 88 includes a first additional restraining surface 94 and a second additional restraining surface 96. In this embodiment, the first additional restraining surface 94 is provided on a first component 80 of the first piston body 64. The second additional restraining surface 96 is provided on the second piston body 66. However, the first additional restraining surface 94 may be provided to a component other than the first piston body 64. The second additional restraining surface 96 may be provided to a component other than the second piston body 66.

[0090] The second additional limiting surface 96 may contact the first additional limiting surface 94 to limit the relative movement of the first piston body 64 with respect to the second piston body 66 away from the cylinder chamber 24. The first additional limiting surface 94 is configured to face the second additional limiting surface 96. The second additional limiting surface 96 is configured to face the first additional limiting surface 94. When the first sealing ring 28 is in the connected position P31, the second additional limiting surface 96 is in contact with the first additional limiting surface 94.

[0091] As shown in Figure 5, when the operating member 14 is in the stationary position P11, the second additional limiting surface 96 is spaced apart from the first additional limiting surface 94 by an additional delay distance DT2. The additional delay distance DT2 is equal to the delay distance DT1 (see, for example, Figure 4) and the distance DS32.

[0092] In this embodiment, the first additional limiting surface 94 has an annular shape. The second additional limiting surface 96 has an annular shape. However, the structures of the first additional limiting surface 94 and the second additional limiting surface 96 are not limited to the structures described above.

[0093] As shown in Figure 4, the delayed bias member 62 is configured to bias the first piston body 64 toward the cylinder chamber 24 relative to the second piston body 66. The biasing force of the reset bias member 35 is greater than the biasing force of the delayed bias member 62. The biasing force of the reset bias member 35 is greater than the biasing force of the lever bias member 14D of the operating member 14 (see, for example, Figure 2). The delayed bias member 62 is provided within the attachment hole 68. The delayed bias member 62 is provided in the intermediate attachment hole 78 of the attachment hole 68. The intermediate member 84 extends through the delayed bias member 62. The second piston body 66 includes a support surface 99 configured to face the first member 80 toward the first piston body 64. The delayed bias member 62 is provided between the first member 80 and the support surface 99 of the second piston body 66. The delayed bias member 62 is provided between the first additional restraint surface 94 and the support surface 99 of the second piston body 66.

[0094] As seen in Figures 4 to 6, the position of piston 22 relative to base member 12 corresponds to the position of first piston body 64 relative to base member 12. Therefore, in response to the movement of operating member 14 between the rest position P11 and the operating position P12, first piston body 64 can move relative to base member 12 between initial position P21 and actuated position P22. In the initial state where first piston body 64 is in initial position P21, first sealing ring 28 is in connected position P31. In the actuated state where first piston body 64 is in actuated position P22, first sealing ring 28 is in additional disconnected position P32. In the intermediate state where first piston body 64 is in intermediate position P23, first sealing ring 28 is in disconnected position P33.

[0095] As shown in Figures 4 to 6, in response to the movement of the operating member 14 between the stationary position P11 and the operating position P12, the second piston body 66 can move relative to the base member 12 between an additional initial position P41 and an additional actuated position P42 (see, for example, Figure 1). As shown in Figure 4, in the initial state where the first piston body 64 is in the initial position P21, the second piston body 66 is in the additional initial position P41. As shown in Figure 5, in the intermediate state where the first piston body 64 is in the intermediate position P23, the second piston body 66 is in the additional initial position P41. As shown in Figure 6, in the actuated state where the first piston body 64 is in the actuated position P22, the second piston body 66 is in the additional actuated position P42.

[0096] As shown in Figure 4, the hydraulic operating device 10 includes a stop 100. The stop 100 is attached to the base member 12. The stop 100 can contact the piston 22 to hold the piston 22 in the cylinder bore 20. In the initial state where the piston 22 is in the initial position P21, the piston 22 contacts the stop 100. In the state where the second piston body 66 is in the additional initial position P41, the second piston body 66 contacts the stop 100.

[0097] As shown in Figures 4 to 6, in response to the movement of the operating member 14 from the stationary position P11 to the operating position P12, the first piston body 64 moves relative to the base member 12 from the initial position P21 through the intermediate position P23 to the actuated position P22 (see, for example, Figure 1). In response to the movement of the operating member 14 from the stationary position P11 to the operating position P12, the first sealing ring 28 moves relative to the base member 12 from the connected position P31 through the disconnected position P33 to the additional disconnected position P32 (see, for example, Figure 1). When the first sealing ring 28 reaches the disconnected position P33, the first sealing ring 28 disconnects the cylinder chamber 24 from the first connecting hole 48. As seen in Figures 5 and 6, in response to the movement of the piston 22 from the intermediate position P23 to the actuated position P22 (see, for example, Figure 1), hydraulic fluid flows from the cylinder chamber 24 to the hydraulically operated device 4.

[0098] As shown in Figures 4 to 6, in response to the operating member 14 moving from the operating position P12 to the stationary position P11, the first piston body 64 moves relative to the base member 12 from the actuated position P22 through the intermediate position P23 to the initial position P21 (see, for example, Figure 1). In response to the movement of the operating member 14 from the operating position P12 to the stationary position P11, the first sealing ring 28 moves relative to the base member 12 from the additional disconnected position P32 through the disconnected position P33 to the connected position P31 (see, for example, Figure 1). As shown in Figure 4, the return of the first sealing ring 28 to the connected position P31 is achieved by connecting the cylinder chamber 24 to the reservoir chamber 38 via the first connecting hole 48.

[0099] As shown in Figures 4 and 5, the delay structure 60 is configured to change the relative position between the first piston body 64 and the second piston body 66 as the piston 22 moves from the initial position P21 to the actuated position P22. The delay structure 60 is also configured to change the distance between the first sealing ring 28 and the second sealing ring 30 as the piston 22 moves from the initial position P21 to the actuated position P22. Furthermore, the delay structure 60 is configured to delay the timing of the movement of the second piston body 66 from the additional initial position P41 to the additional actuated position P42 from the timing of the movement of the first piston body 64 from the initial position P21 to the actuated position P22.

[0100] More specifically, the first piston body 64 can move relative to the second piston body 66 in the direction of movement D1 within a delay distance DT1. In the initial state where the piston 22 is in the initial position P21, the delay biasing member 62 biases the second piston body 66 toward the additional initial position P41. Therefore, when the first piston body 64 moves from the initial position P21 to the intermediate position P23, the second piston body 66 remains in the additional initial position P41. When the first piston body 64 moves from the initial position P21 to the intermediate position P23, the second sealing ring 30 remains in its initial position. Therefore, the delay structure 60 is configured to change the relative position between the first piston body 64 and the second piston body 66 as the piston 22 moves from the initial position P21 to the intermediate position P23. The delay structure 60 is configured to change the distance between the first sealing ring 28 and the second sealing ring 30 as the piston 22 moves from the initial position P21 to the intermediate position P23.

[0101] As shown in Figure 5, when the first piston body 64 reaches the intermediate position P23, the first limiting surface 90 contacts the second limiting surface 92. As shown in Figures 5 and 6, in response to the movement of the operating member 14 from the intermediate operating position P13 to the operating position P12, the first piston body 64 moves relative to the base member 12 from the intermediate position P23 to the actuated position P22 (see, for example, Figure 1). In response to the movement of the first piston body 64 from the intermediate position P23 to the actuated position P22, the second piston body 66 moves relative to the base member 12 from the additional initial position P41 to the additional actuated position P42. Therefore, the delay structure 60 is configured such that the relative positions between the first piston body 64 and the second piston body 66 do not change as the piston 22 moves from the intermediate position P23 to the actuated position P22. The delay structure 60 is configured such that the distance between the first sealing ring 28 and the second sealing ring 30 does not change as the piston 22 moves from the intermediate position P23 to the actuated position P22.

[0102] As shown in Figures 4 to 6, the delay structure 60 is configured to change the relative position between the first piston body 64 and the second piston body 66 as the piston 22 returns to the initial position P21. The delay structure 60 is configured to change the distance between the first sealing ring 28 and the second sealing ring 30 as the piston 22 returns to the initial position P21. The delay structure 60 is configured to delay the timing of the first sealing ring 28 returning from the disconnected position P33 to the connected position P31 as the piston 22 returns to the initial position P21.

[0103] As shown in Figures 5 and 6, in response to the movement of the operating member 14 from the operating position P12 to the intermediate operating position P13 (here, a return movement), the first piston body 64 moves relative to the base member 12 from the actuated position P22 to the intermediate position P23 (see, for example, Figure 1). In response to the movement of the operating member 14 from the operating position P12 to the intermediate operating position P13, the first sealing ring 28 moves relative to the base member 12 from the additional disconnected position P32 to the disconnected position P33 (see, for example, Figure 1). In response to the movement of the operating member 14 from the operating position P12 to the intermediate operating position P13, the second piston body 66 moves relative to the base member 12 from the additional actuated position P42 to the additional initial position P41 (see, for example, Figure 1). Therefore, the delay structure 60 is configured not to change the relative positions between the first piston body 64 and the second piston body 66 when the piston 22 returns from the actuated position P22 to the intermediate position P23 (see, for example, Figure 1). When the piston 22 returns from the actuated position P22 to the intermediate position P23 (see, for example, Figure 1), the delay structure 60 is configured to not change the distance between the first sealing ring 28 and the second sealing ring 30.

[0104] As shown in Figures 4 and 5, when the second piston body 66 reaches the additional initial position P41, the second piston body 66 contacts the stop member 100. Therefore, when the first piston body 64 moves relative to the base member 12 from the intermediate position P23 to the initial position P21, the second piston body 66 remains in the additional initial position P41. When the first piston body 64 returns from the intermediate position P23 to the initial position P21, the delayed biasing member 62 applies a biasing force to the first piston body 64 in the first movement direction D31. Therefore, when the first piston body 64 returns from the intermediate position P23 to the initial position P21, the movement speed of the first piston body 64 is reduced due to the biasing force of the delayed biasing member 62. Therefore, the delay structure 60 is configured to delay the timing of the first sealing ring 28 returning from the disconnected position P33 to the connected position P31 as the first piston body 64 returns from the intermediate position P23 to the initial position P21.

[0105] As shown in Figure 7, the sealing ring 30 includes a radially inner component 30A and a radially outer component 30B. The radially outer component 30B is provided radially outside the radially inner component 30A. The radially inner component 30A has an annular shape. The radially outer component 30B has an annular shape. The radially inner component 30A extends along the cylinder central axis A2. The radially outer component 30B is inclined relative to the cylinder central axis A2. The radially outer component 30B extends radially outward from the radially inner component 30A.

[0106] The radially outer component 30B includes a radially outer end 30C and a radially inner end 30D. The radially outer end 30C is provided radially outside the radially inner end 30D. The radially inner end 30D is coupled to the radially inner component 30A. The radially outer end 30C is radially spaced from the radially inner component 30A. The radially outer end 30C can contact the support component 112.

[0107] The piston 22 includes a sealing support 110 configured to maintain contact between the sealing ring 30 and the inner circumferential surface 20A of the cylinder bore 20. The sealing support 110 is provided to at least one of the piston body 26 and the sealing ring 30. In this embodiment, the sealing support 110 is provided on the outer periphery of the piston body 26. The sealing support 110 is provided on the outer periphery of the second piston body 66. However, the sealing support 110 may be provided to the sealing ring 30 or both the piston body 26 and the sealing ring 30.

[0108] The sealing support 110 can contact the sealing ring 30. The sealing support 110 can contact the radially outer component 30B of the sealing ring 30. The sealing support 110 can contact the radially outer end 30C of the radially outer component 30B of the sealing ring 30. In this embodiment, the sealing support 110 contacts the radially outer end 30C of the radially outer component 30B when the radially outer end 30C of the radially outer component 30B is in contact with the inner circumferential surface 20A of the cylinder bore 20. However, when the radially outer end 30C of the radially outer component 30B is in contact with the inner circumferential surface 20A of the cylinder bore 20, the sealing support 110 can be spaced apart from the radially outer end 30C of the radially outer component 30B in the movement direction D1.

[0109] As shown in Figure 8, the sealing support 110 includes at least one support member 112 that can contact the sealing ring 30. In this embodiment, the sealing support 110 includes a plurality of support members 112. The plurality of support members 112 are circumferentially arranged at regular intervals. The sealing support 110 includes at least one groove 114. In this embodiment, the sealing support 110 includes a plurality of grooves 114. The grooves 114 are provided between adjacent members of the plurality of support members 112.

[0110] As shown in Figure 7, the support member 112 extends along the cylinder center axis A2. The groove 114 extends along the cylinder center axis A2. The groove 114 connects to the intermediate space 51.

[0111] As shown in Figures 7 and 8, a plurality of support members 112 protrude radially outward from the radially outer surface 66A of the second piston body 66. Therefore, the radially outer surface 112A of the support members 112 is provided radially outside the radially outer surface 66A of the second piston body 66. However, provided that the sealing support 110 can contact the radially outer end 30C of the radially outer member 30B, the radially outer surface 112A of the support members 112 can be provided at the same radial position as the radially outer surface 66A of the second piston body 66, or can be provided radially inside the radially outer surface 66A of the second piston body 66.

[0112] Furthermore, the shape of the sealing support 110 is not limited to the shapes depicted in Figures 7 and 8. The shape of the sealing support 110 can be arbitrarily set. For example, the sealing support may include a plurality of support members projecting axially from the piston body 26 relative to the cylinder central axis A2. The plurality of support members may contact the radially outer end 30C of the radially outer member 30B and be circumferentially arranged at regular intervals. Grooves are provided between adjacent members of the plurality of support members. Viewed from a direction perpendicular to the cylinder central axis A2, each of the plurality of support members may include a curved convex surface. Viewed from a direction perpendicular to the cylinder central axis A2, each of the plurality of grooves may include a curved concave surface. For example, each of the curved convex surface and the curved concave surface has an arched shape when viewed from a direction perpendicular to the cylinder central axis A2. When viewed from a direction perpendicular to the cylinder central axis A2, the plurality of curved convex surfaces and the plurality of curved concave surfaces define a wavy shape. Change

[0113] In the above embodiments, the delay structure 60 is provided on the piston 22. The delay biasing member 62 is provided on the piston 22. However, the configuration of the delay structure 60 is not limited to the above embodiments. As shown in FIG9, for example, the delay structure 60 may be provided on the stop 100. The delay biasing member 62 is provided on the stop 100. The piston body 26 is integrally provided as a one-piece component. The delay biasing member 62 is configured to apply a biasing force to the piston body 26 to delay the timing of the first sealing ring 28 returning from the disconnected position P33 to the connected position P31. As shown in FIG10, the delay structure 60 is provided on the base component 12. The delay biasing member 62 is provided on the base component 12. The piston body 26 is integrally provided as a one-piece component. The delay biasing member 62 is configured to apply a biasing force to the operating member 14 to delay the timing of the first sealing ring 28 returning from the disconnected position P33 to the connected position P31. The delay structures 60 depicted in FIG3, 9, and 10 can be combined with each other.

[0114] In the above embodiment, the sealing support 110 is provided to the piston body 26. However, as shown in FIG11, the sealing support 110 may be provided to the sealing ring 30. For example, the sealing support 110 may be provided at the radially outer end 30C of the radially outer component 30B.

[0115] As used herein, the term "comprising" and its derivatives are open-ended terms that specify the presence of the stated features, elements, components, groups, integers, and / or steps, but do not exclude the presence of other unstated features, elements, components, groups, integers, and / or steps. This concept also applies to words with similar meanings, such as the terms "having," "comprising," and their derivatives.

[0116] The terms “component,” “segment,” “part,” “component,” “element,” “body,” and “structure” can have a dual meaning of a single part or multiple parts when used in the singular.

[0117] In this application, ordinal numbers such as "first" and "second" are merely identifiers and do not have any other meaning, such as a specific order. Furthermore, for example, the term "first element" does not imply the existence of "second element," nor does the term "second element" imply the existence of "first element."

[0118] As used herein, the term "pair" may cover configurations in which the pair of elements have different shapes or structures from each other, except configurations in which the pair of elements have the same shape or structure.

[0119] The terms “a (a)” (or “an)”, “one or more” and “at least one” are used interchangeably in this document.

[0120] The phrase “at least one” as used in this disclosure means “one or more” of the desired options. For example, if the number of options is two, the phrase “at least one or at least one” as used in this disclosure means “only one single option” or “both of the two options”. For another example, if the number of options is equal to or greater than three, the phrase “at least one or at least one” as used in this disclosure means “only one single option” or “any combination of two options”. For example, the phrase “at least one of A and B” includes (1) A alone, (2) B alone, and (3) both A and B. The phrase “at least one of A, B and C” includes (1) A alone, (2) B alone, (3) C alone, (4) A and B, (5) B and C, (6) A and C, and (7) all A, B and C. In other words, the phrase “at least one of A and B” in this disclosure does not mean “at least one of A and at least one of B”.

[0121] Finally, the degree terms used herein, such as “approximately or substantially,” “about or approximately,” and “nearly or approximate,” indicate that the term they modify has a reasonable amount of deviation that would not significantly alter the final result. All numerical values ​​described in this application can be interpreted as including terms such as “approximately or substantially,” “about or approximately,” and “nearly or approximate.”

[0122] Obviously, various modifications and variations of the present invention are possible based on the above teachings. Therefore, it should be understood that the present invention may be practiced in ways other than those specifically described herein, within the scope of the appended claims.

[0123] 2: Human-powered vehicles 3: Handlebars 4: Subject to hydraulic operating device 6: Hydraulic hose 10: Hydraulic operating device 12: Base components 14: Operating components 14A: Lever 14B: Transfer Components 14C: Adjustment Structure 14D: Lever biasing component 18: Install components 20: Cylinder bore 20A: Inner peripheral surface 22: Piston 24: Cylinder Chamber 25: Piston rod 25A: First rod end 25B: Second rod end 26: Piston body 28: First sealing ring 28A: Contact area 30: Second sealing ring 30A: Radial inner component 30B: Radial outer component 30C: Radial outer end 30D: Radial inner end 32: First trench 34: Second trench 35: Reset bias component 36: Storage container 38: Storage Room 40: Storage hole 40A: Threaded hole 41: Diaphragm 42: Cover 44: Drain plug 46: Drain hole 48: First connecting hole 48A: Open at the first end 50: Second connecting hole 50A: Open at the second end 51: Intermediate Space 52: Third connecting hole 54: Fourth connecting hole 56: Stopper 60: Delay Structure 62: Delayed biasing component 64: First piston body 66: Second piston body 66A: Radial outer surface 68: Attachment hole 70: Sealing components 72: Inner groove 74: First attachment hole 76: Second attachment hole 78: Middle attachment hole 79: Stepped components 80: First component 82: Second component 84: Intermediate components 84A: First end 84B: Second end 88: Restricted Structure 90: First limiting surface 92: Second limiting surface 94: First additional limiting surface 96: Second additional limiting surface 99: Supporting surface 100: Stop 110: Sealing support component 112: Supporting components 112A: Radial outer surface 114: Groove P11: Stationary Position P12: Operating Position P13: Intermediate Operation Position P21: Initial Position P22: Actuation Position P23: Middle position P31: Connection Position P32: Additional Disconnection Location P33: Disconnection Position P41: Attach Initial Position P42: Additional Actuation Position A1: Pivot axis A2: Cylinder center axis D1: Movement direction D11: First direction of movement D12: Second direction of movement DM11: First inner diameter DM12: Second inner diameter DM13: Third inner diameter DM21: First outer diameter DM22: Second outer diameter DM23: Third outer diameter DS21: Distance DS31: Distance DS32: Distance DT1: Delay distance DT2: Additional delay distance

Claims

1. A hydraulic operating device for a human-powered vehicle, comprising: Base components including cylinder bores; A piston, movably provided in the cylinder bore, the base member and the piston defining a cylinder chamber in the cylinder bore, the piston including a piston body and a first sealing ring provided to the piston body; a reservoir including a reservoir chamber, the base member including a first connecting hole configured to connect the reservoir chamber and the cylinder chamber; an operating member coupled to the piston to move the piston relative to the base member between an initial position and an actuated position in response to movement of the operating member relative to the base member between a rest position and an operating position, wherein the first sealing ring is configured to be in a connected position in the initial state of the piston being in the initial position, in which the cylinder chamber communicates with the reservoir chamber through the first connecting hole, and the first sealing ring is configured to be in a disconnected position in which the first sealing ring disconnects the cylinder chamber from the reservoir chamber; and a delay structure configured to delay the timing of the first sealing ring returning from the disconnected position to the connected position as the piston returns to the initial position.

2. The hydraulic operating device as claimed in claim 1, wherein, The delay structure is provided within the cylinder bore.

3. The hydraulic operating device as described in claim 1 or 2, wherein, The delay structure is mounted on the piston.

4. The hydraulic operating device as described in claim 1 or 2, wherein, The delay structure includes a delay biasing member configured to bias the first sealing ring toward the cylinder chamber when the piston returns to the initial position.

5. The hydraulic operating device as claimed in claim 4, wherein, The piston body includes a first piston body coupled to the actuating member to receive movement of the actuating member, a second piston body movably provided on the first piston body, a first sealing ring provided to the first piston body, and a delayed biasing member configured to bias the first piston body toward the cylinder chamber relative to the second piston body.

6. The hydraulic operating device as claimed in claim 5, wherein, The delay structure is configured to change the relative position between the first piston body and the second piston body as the piston returns to the initial position.

7. The hydraulic operating device as described in claim 6, wherein, The delay structure is configured to change the relative position as the piston moves from the initial position to the actuation position.

8. The hydraulic operating device as claimed in claim 5, wherein, The second piston body includes an attachment hole, and the first piston body is partially and movably provided in the attachment hole.

9. The hydraulic operating device as claimed in claim 8, wherein, The delayed biasing member is provided within the attachment hole.

10. The hydraulic operating device as claimed in claim 5, wherein, The delayed biasing component includes a helical spring.

11. The hydraulic operating device as claimed in claim 5, wherein, The piston includes a sealing member provided between the first piston body and the second piston body.

12. The hydraulic operating device as claimed in claim 5, wherein, The piston includes a limiting structure configured to restrict relative movement between the first piston body and the second piston body toward the cylinder chamber.

13. The hydraulic operating device as claimed in claim 5 further comprises: a reset biasing member configured to bias the piston toward the initial position, wherein the biasing force of the reset biasing member is greater than the biasing force of the delayed biasing member.

14. The hydraulic operating device as claimed in claim 5, wherein, The piston includes a second sealing ring provided to the second piston body.

15. The hydraulic operating device as claimed in claim 1 or 2, wherein, The piston includes a second sealing ring provided to the piston body.

16. The hydraulic operating device as claimed in claim 15, wherein, The delay structure is designed to change the distance between the first sealing ring and the second sealing ring as the piston returns to the initial position.

17. The hydraulic operating device as claimed in claim 16, wherein, The delay structure is configured to change the distance between the first sealing ring and the second sealing ring as the piston moves from the initial position to the actuated position.

18. The hydraulic operating device as claimed in claim 1 or 2, wherein, The base component includes a second connection hole, configured to connect the reservoir chamber to an intermediate space provided between the inner circumferential surfaces of the piston and the cylinder bore.

19. The hydraulic operating device as claimed in claim 18, wherein, The first sealing ring is provided between the first connecting hole and the second connecting hole when the first sealing ring is in the connected position.

Images