Split fine-tuning type bicycle brake handle

Abstract

The utility model relates to the technical field of bicycle accessories, concretely to a split fine adjustment type bicycle brake handle, including brake handle main part, brake handle main part is connected with brake handle through the rotation of pivot pin, the outside of pivot pin is equipped with the torsional spring for resetting brake handle, the U-shaped brake line connecting block is rotatably connected on brake handle, the circular lug is equipped on brake handle main part, the end part of circular lug is equipped with the positioning hole, the fine adjustment subassembly is equipped on circular lug, fine adjustment subassembly includes the adjusting screw of sliding connection in the positioning hole, the outer wall of adjusting screw is equipped with the adjusting knob with screw thread connection. The split fine adjustment type bicycle brake handle, adjusting screw and brake handle main part adopt split sliding fit design, adjusting screw moves in the inside axial movement when adjusting knob drives, avoids the gap produced in the rotation nut or screw rod in traditional integral type or screw connection structure, fundamentally solves the problem of clamping hand, and the use safety is improved obviously.

Description

Technical Field

[0001] This utility model relates to the field of bicycle accessories technology, specifically a split-type micro-adjustable bicycle brake lever. Background Technology

[0002] The bicycle brake lever is an important component of the bicycle braking system. Its function is to control the brakes manually, thereby slowing down or stopping the bicycle. Traditional brake levers have certain defects in design and adjustment structure, failing to fully meet the user's comfort needs while riding. Furthermore, existing adjustment methods also have shortcomings in manufacturing processes and user experience.

[0003] Currently, the fine-tuning mechanism in bicycle brake levers typically consists of a nut and an adjusting screw with a hole. According to existing technology, there are two common adjustment methods: 1. The adjusting screw and handle are integrally molded, and the brake tightness is adjusted by rotating the nut. The advantage of this method is its compact structure. However, because the adjusting screw and handle are integrated, gaps inevitably appear after rotating the nut, which can easily pinch the hand during use, affecting the riding experience. Furthermore, the integrally molded structure requires higher manufacturing precision, increasing manufacturing difficulty and cost.

[0004] 2. The adjusting screw is connected to the handle by a thread, and the brake tightness is adjusted by rotating the adjusting screw. Although this method is relatively common, the adjusting screw will still have a gap with the handle during the adjustment process, which poses a risk of pinching the hand, and it is also not aesthetically pleasing.

[0005] Both adjustment methods described above have limitations in practical use, including limited comfort, less aesthetically pleasing design, and greater manufacturing difficulty. These shortcomings directly affect the user experience, especially for long-distance riders or professional cyclists, where minor flaws in the handlebars can cause significant inconvenience.

[0006] In light of this, we propose a split-type micro-adjustable bicycle brake lever. This structure, through its innovative split design, optimizes the connection between the adjusting screw and the lever, resolving issues of hand pinching and unsightly appearance during use. Utility Model Content

[0007] The purpose of this invention is to provide a split-type fine-adjustment bicycle brake lever to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: A split-type micro-adjustable bicycle brake lever includes a brake lever body, to which a brake lever handle is rotatably connected via a pivot pin. The pivot pin serves as a rotation axis, enabling the brake lever handle to hinge with the brake lever body. The brake lever handle, as a user operating component, uses a lever principle to drive a U-shaped brake cable connecting block to pull the brake cable. A torsion spring is provided on the outer side of the pivot pin for returning the brake lever handle to its original position. The torsion spring provides an automatic return force after the brake lever handle is operated. A U-shaped brake cable connecting block is rotatably connected to the brake lever handle, which is used to fix the end of the brake cable and transmit tension. The brake lever body has a circular protrusion, which provides a mounting base for the fine-tuning component and restricts the degree of freedom of the adjusting screw. The end of the circular protrusion has a positioning hole, which restricts the degree of rotation by engaging with the positioning section of the adjusting screw through the inner wall plane. The circular protrusion has a fine-tuning component, which is used to adjust the tension of the brake cable. The fine-tuning component includes an adjusting screw that is slidably connected in the positioning hole. The adjusting screw changes the tension of the brake cable by axial movement. A conical groove optimizes the bending angle of the brake cable. An adjusting knob is threaded to the outer wall of the adjusting screw. The adjusting knob drives the adjusting screw to move through the thread. When the adjustment knob drives the adjustment screw to move outward, since the total length of the brake cable is fixed, the adjustment screw will press the brake cable down, forcing the brake cable to tighten, thereby reducing the gap between the brake pads and the wheel rim, reducing the free travel of the brake lever, and making the response more sensitive. When the adjustment knob drives the adjustment screw to move inward, since the total length of the brake cable is fixed, the upward movement of the adjustment screw is equivalent to releasing the tension of the brake cable. The brake cable is relatively relaxed, which increases the gap between the brake pads and the wheel rim, and increases the free travel of the brake lever.

[0009] Preferably, the bottom end of the brake lever body is provided with a handlebar clamp, which is used to fix the entire brake lever to the bicycle handlebar. The handlebar clamp is fixed to the handlebar by a locking bolt.

[0010] Preferably, the top of the U-shaped brake cable connector has a cable opening for the brake cable to pass through, and the bottom of the U-shaped brake cable connector has a support block that supports the end hammer of the brake cable to prevent the brake cable from coming out.

[0011] Preferably, the upper and lower sides of the inner wall of the positioning hole are arc-shaped structures, and the front and rear sides of the inner wall of the positioning hole are planar structures. The outer wall of the adjusting screw has two positioning surfaces, which are respectively fitted to the front and rear sides of the inner wall of the positioning hole. The positioning surfaces cooperate with the plane of the inner wall of the positioning hole to restrict the rotation of the adjusting screw.

[0012] Preferably, the left end of the adjusting screw has a conical groove, which forms a gradual transition structure to reduce the bending and wear of the brake cable. The right end of the adjusting screw has a circular groove that communicates with the conical groove, for the end of the brake cable sleeve to be inserted.

[0013] Preferably, the left end of the adjustment knob is provided with a insertion groove, the inner wall of the insertion groove is tightly fitted with the outer wall of the circular protrusion, ensuring that the adjustment knob can be fitted onto the outer wall of the circular protrusion. The outer wall of the adjustment knob is provided with multiple anti-slip grooves, which increase the operating friction and prevent the hand from slipping.

[0014] Preferably, the adjusting knob has a threaded groove communicating with the insertion slot, the right end of the adjusting screw is threaded into the threaded groove, and the right end of the adjusting knob has a wire-passing hole communicating with the threaded groove for the brake cable sleeve to pass through.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. This split-type micro-adjustable bicycle brake lever features a split sliding fit design between the adjusting screw and the main body of the brake lever. When the adjusting knob is driven, the adjusting screw moves axially inside, avoiding the gaps caused by rotating the nut or screw in traditional one-piece or threaded connection structures. This fundamentally solves the problem of pinching the hand and significantly improves the safety of use.

[0016] 2. The split-type micro-adjustable bicycle brake lever has a planar structure of positioning hole that matches the positioning tangent of adjusting screw, which restricts the circumferential rotation of adjusting screw and ensures that it only moves along the axis during adjustment, thus enabling micro-adjustment of brake cable tension.

[0017] 3. This split-type micro-adjustment bicycle brake lever features a standardized modular design for its split micro-adjustment components, eliminating the need for complex one-piece molding processes and reducing manufacturing difficulty; at the same time, each component can be replaced individually, reducing maintenance costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall first-view structure of this utility model; Figure 2 This is a schematic diagram of the overall second-view structure of this utility model; Figure 3 This is a schematic diagram of the overall exploded structure of this utility model; Figure 4 This is a schematic diagram of the main structure of the brake lever in this utility model; Figure 5 This is a schematic diagram of the assembly structure of the brake lever handle and the U-shaped brake cable connecting block in this utility model. Figure 6 This is a schematic diagram of the fine-tuning component structure in this utility model; Figure 7 This is a cross-sectional structural diagram of the adjusting screw in this utility model; In the diagram: 100, brake lever body; 110, circular protrusion; 111, positioning hole; 200, handlebar clip; 300, locking bolt; 400, pivot pin; 500, brake lever handle; 600, torsion spring; 700, U-shaped brake cable connector; 701, cable opening; 710, support block; 800, fine-tuning component; 810, adjusting screw; 811, positioning facet; 812, conical groove; 813, circular groove; 820, adjusting knob; 821, insertion slot; 822, threaded groove; 823, cable guide hole; 824, anti-slip groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] Please see Figures 1-7 This utility model provides a technical solution: A split-type micro-adjustable bicycle brake lever includes a brake lever body 100. The brake lever body 100 is rotatably connected to a brake lever handle 500 via a pivot pin 400. The pivot pin 400 serves as a rotation axis, enabling the brake lever handle 500 to be hinged to the brake lever body 100. The brake lever handle 500 serves as a user operating component, using a lever principle to drive a U-shaped brake cable connecting block 700 to pull the brake cable. A torsion spring 600 is provided on the outer side of the pivot pin 400 for resetting the brake lever handle 500. The torsion spring 600 provides an automatic reset force after the brake lever handle 500 is operated. A U-shaped brake cable connecting block 700 is rotatably connected to the brake lever handle 500, which is used to fix the end of the brake cable and transmit tension. The brake lever body 100 is provided with a circular protrusion 110. The circular protrusion 110 provides a mounting base for the fine adjustment component 800 and restricts the degree of freedom of the adjustment screw 810. The end of the circular protrusion 110 is provided with a positioning hole 111. The positioning hole 111 restricts the degree of rotational freedom by cooperating with the positioning section 811 of the adjustment screw 810 through the inner wall plane. The circular protrusion 110 is provided with a fine adjustment component 800. The fine adjustment component 800 is used to adjust the tightness of the brake cable. The fine adjustment component 800 includes an adjustment screw 810 slidably connected in the positioning hole 111. The adjustment screw 810 changes the tension of the brake cable by axial movement. The conical groove 812 optimizes the bending angle of the brake cable. The outer wall of the adjustment screw 810 is threadedly connected to an adjustment knob 820. The adjustment knob 820 drives the adjustment screw 810 to move through the thread. When the adjusting knob 820 drives the adjusting screw 810 to move outward, since the total length of the brake cable is fixed, the adjusting screw 810 presses the brake cable down, forcing the brake cable to tighten, thereby reducing the gap between the brake pads and the wheel rim, reducing the free travel of the brake lever 500, and making the response more sensitive. When the adjusting knob 820 drives the adjusting screw 810 to move inward, since the total length of the brake cable is fixed, the upward movement of the adjusting screw 810 is equivalent to releasing the tension of the brake cable. The brake cable is relatively relaxed, which increases the gap between the brake pads and the wheel rim, and increases the free travel of the brake lever 500.

[0022] In this embodiment, a handlebar clamp 200 is provided at the bottom end of the brake lever body 100. The handlebar clamp 200 is used to fix the entire brake lever to the bicycle handlebar. The handlebar clamp 200 is fixed to the handlebar by a locking bolt 300.

[0023] Specifically, the top of the U-shaped brake cable connector 700 has a cable opening 701 for the brake cable to pass through, and the bottom of the U-shaped brake cable connector 700 has a support block 710, which supports the end hammer of the brake cable to prevent the brake cable from coming out.

[0024] Furthermore, the upper and lower sides of the inner wall of the positioning hole 111 are both arc-shaped structures, and the front and rear sides of the inner wall of the positioning hole 111 are both planar structures. The outer wall of the adjusting screw 810 has two positioning cut surfaces 811. The two positioning cut surfaces 811 are respectively attached to the front and rear sides of the inner wall of the positioning hole 111. The positioning cut surfaces 811 are in contact with the planar inner wall of the positioning hole 111, which restricts the rotation of the adjusting screw 810.

[0025] Furthermore, a conical groove 812 is provided at the left end of the adjusting screw 810, forming a gradual transition structure to reduce the bending and wear of the brake cable. A circular groove 813 is provided at the right end of the adjusting screw 810, which communicates with the conical groove 812, for the end of the brake cable sleeve to be inserted.

[0026] Furthermore, the left end of the adjustment knob 820 is provided with a insertion groove 821. The inner wall of the insertion groove 821 fits tightly with the outer wall of the circular protrusion 110, ensuring that the adjustment knob 820 can be fitted onto the outer wall of the circular protrusion 110 without any gaps. The outer wall of the adjustment knob 820 is provided with multiple anti-slip grooves 824, which increase the operating friction and prevent the hand from slipping.

[0027] Furthermore, the adjusting knob 820 has a threaded groove 822 that communicates with the insertion slot 821. The right end of the adjusting screw 810 is threaded into the threaded groove 822, and the adjusting screw 810 can move within the threaded groove 822 to achieve inward or outward adjustment. The right end of the adjusting knob 820 has a wire passage hole 823 that communicates with the threaded groove 822 for the brake cable sleeve to pass through.

[0028] In this embodiment, the split-type fine-adjustment bicycle brake lever is used by first fixing the brake lever body 100 to the bicycle handlebars using the handlebar clip 200 and locking bolt 300. Then, the user presses the brake lever handle 500 to expose the U-shaped brake cable connector 700. Next, the end of the brake cable furthest from the hammer head is passed sequentially through the circular protrusion 110, adjusting screw 810, and adjusting knob 820. The hammer head at the end of the brake cable is engaged with the U-shaped brake cable connector 700. After the brake cable installation is complete, operating the brake lever handle 500 causes it to rotate around the pivot pin 400 and pull the brake cable through the U-shaped brake cable connector 700 to achieve braking. The torsion spring 600 ensures the brake lever handle 500... Automatically resets after release; when brake sensitivity needs to be adjusted, the user holds the anti-slip groove 824 of the adjustment knob 820 and rotates it, driving the adjustment screw 810 to move axially within the positioning hole 111. The positioning surface 811 and the inner plane of the positioning hole 111 cooperate to restrict the rotation of the adjustment screw 810. When the adjustment screw 810 moves outward, it presses down on the brake cable through the conical groove 812 to tighten it, reducing the gap between the brake pad and the wheel rim, and reducing the free travel of the brake lever handle 500. When the adjustment screw 810 moves inward, it releases the tension of the brake cable, increasing the gap between the brake pad and the wheel rim. During the adjustment process, the insertion groove 821 fits against the outer wall of the circular protrusion 110 to prevent gaps from being generated, achieving a hand-free and stable fine-tuning function.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A split-type micro-adjustable bicycle brake lever, comprising a brake lever body (100), characterized in that: The brake lever body (100) is rotatably connected to the brake lever handle (500) via a pivot pin (400). A torsion spring (600) for resetting the brake lever handle (500) is provided on the outer side of the pivot pin (400). A U-shaped brake cable connecting block (700) is rotatably connected to the brake lever handle (500). A circular protrusion (110) is provided on the brake lever body (100). A positioning hole (111) is opened at the end of the circular protrusion (110). A fine adjustment component (800) is provided on the circular protrusion (110). The fine adjustment component (800) includes an adjusting screw (810) slidably connected in the positioning hole (111). An adjusting knob (820) is threadedly connected to the outer wall of the adjusting screw (810).

2. The split-type fine-adjustment bicycle brake lever according to claim 1, characterized in that: The bottom end of the brake lever body (100) is provided with a handlebar clamp (200), which is fixed to the handlebar by a locking bolt (300).

3. The split-type fine-adjustment bicycle brake lever according to claim 1, characterized in that: The top of the U-shaped brake line connector (700) is provided with a wire opening (701), and the bottom of the U-shaped brake line connector (700) is provided with a support block (710).

4. The split-type fine-adjustment bicycle brake lever according to claim 1, characterized in that: The upper and lower sides of the inner wall of the positioning hole (111) are arc-shaped structures, and the front and rear sides of the inner wall of the positioning hole (111) are planar structures. The outer wall of the adjusting screw (810) has two positioning cut surfaces (811), and the two positioning cut surfaces (811) are respectively attached to the front and rear sides of the inner wall of the positioning hole (111).

5. The split-type fine-adjustment bicycle brake lever according to claim 1, characterized in that: The left end of the adjusting screw (810) is provided with a conical groove (812), and the right end of the adjusting screw (810) is provided with a circular groove (813) that communicates with the conical groove (812).

6. The split-type fine-adjustment bicycle brake lever according to claim 1, characterized in that: The left end of the adjustment knob (820) is provided with a plug groove (821), the inner wall of the plug groove (821) is closely fitted with the outer wall of the circular protrusion (110), and the outer wall of the adjustment knob (820) is provided with multiple anti-slip grooves (824).

7. The split-type fine-adjustment bicycle brake lever according to claim 6, characterized in that: The adjusting knob (820) has a threaded groove (822) that communicates with the insertion slot (821). The right end of the adjusting screw (810) is threaded into the threaded groove (822). The right end of the adjusting knob (820) has a wire hole (823) that communicates with the threaded groove (822).

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