Adjustable stem head device and bicycle

Abstract

The utility model relates to an adjustable stem head device and a bicycle, the adjustable stem head device comprises a stem seat, a stem head and a tightness adjusting device, the stem seat is fixedly connected with a bicycle frame, one end of the stem head is rotatably connected with the stem seat, and the other end of the stem head is rotatably connected with a handlebar of a handlebar; the tightness adjusting device is composed of a first fastening piece, a second fastening piece and an adjusting piece, the first fastening piece and the second fastening piece are controlled to be close to or away from each other through the adjusting piece, and therefore the tightness between the stem head and the stem base and the tightness between the stem head and the stem base are adjusted, and the height and the angle of the handlebar can be adjusted at the same time through the stem head. After adjustment is finished, the stem head, the stem seat and the handlebar are fixed at the same time through the adjusting piece. The stem head adjusting device has the effects that the stem head adjusting efficiency is improved, and meanwhile the stem head adjusting effect is improved.

Description

Technical Field

[0001] This application relates to the field of bicycle components, and more particularly to an adjustable handlebar stem assembly and a bicycle. Background Technology

[0002] Currently, most children's and youth bicycles use fixed stems without toothed handlebars, meaning they cannot be adjusted for height or fore-and-aft position. However, children and teenagers grow quickly, and as the bicycle saddle is raised to accommodate their height, the handlebars cannot be adjusted accordingly, resulting in an unhealthy riding posture. Replacing the stem would inevitably be a waste of resources.

[0003] Currently known adjustable handlebar stems typically involve loosening and adjusting two or more screws before tightening them. During the tightening process, there is a certain probability of twisting, the handlebar becoming misaligned, insufficient tightening strength, or even requiring multiple adjustments to complete the adjustment. Utility Model Content

[0004] To improve the adjustment effect of the handlebar stem, this application provides an adjustable handlebar stem device and a bicycle.

[0005] Firstly, the adjustable handle head device provided in this application adopts the following technical solution:

[0006] An adjustable handlebar head device, comprising:

[0007] The handlebar stand is fixedly connected to the bicycle frame.

[0008] The handlebar head has one end rotatably connected to the handlebar seat and the other end rotatably connected to the handlebar crossbar.

[0009] The tension adjustment device includes a first fastener, a second fastener, and an adjusting member. The first fastener abuts against the handlebar stem, the second fastener abuts against the handlebar crossbar, and the adjusting member is located between the first fastener and the second fastener. The adjusting member adjusts the tension between the first fastener and the second fastener and the handlebar stem and the handlebar crossbar by adjusting the first fastener and the second fastener to move closer or further apart from each other.

[0010] By adopting the above technical solution, the adjusting component adjusts the distance between the first and second fasteners. When the first and second fasteners are close to each other, the stem head is loosened from the stem seat and the handlebars. At this time, the height and angle of the handlebars can be adjusted. When the first and second fasteners are far apart, the stem head can be fixed simultaneously from the stem seat and the handlebars. The tightening and loosening of the first fastener and the stem seat, as well as the tightening and loosening of the second fastener and the handlebars, can be achieved simultaneously through one adjusting component. When the adjusting component is adjusted to a loose state, the handlebars can be rotated, and the height and angle of the handlebars can be adjusted simultaneously through the stem head, preventing the handlebars from twisting during adjustment. After adjustment, the stem head, stem seat, and handlebars are fixed simultaneously through the adjusting component, improving the stem head adjustment efficiency and effect.

[0011] Preferably, the adjusting component includes an adjusting knob and an adjusting seat. The adjusting seat has a first inclined surface on both sides opposite to the first fastener and the second fastener. The first fastener and the second fastener each have a second inclined surface that abuts against the first inclined surface. A compression spring is provided between the first fastener and the second fastener and the handle head, and the compression spring pushes the first fastener and the second fastener closer to each other. The direction in which the first fastener and the second fastener move closer to each other or further away from each other is the first direction, and the direction perpendicular to the first direction is the second direction. One end of the adjusting knob is connected to a screw, and the screw rotation adjusts the first inclined surface along the second inclined surface to push the first fastener and the second fastener further away from each other when the adjusting seat moves in the second direction, thereby achieving a fastening effect.

[0012] By adopting the above technical solution, the design of the adjustment knob and adjustment seat allows for quick and precise adjustment of the tightness of the first and second fasteners through a simple rotation operation. Specifically, the threaded rotation of the adjustment knob drives the adjustment seat to move along a second direction. The first inclined surface of the adjustment seat engages with the second inclined surfaces of the first and second fasteners, thereby pushing the first and second fasteners away from or closer to each other along the first direction. This design not only simplifies the adjustment process and improves adjustment efficiency but also ensures stability and reliability during the adjustment process. Furthermore, the compression spring further enhances the tight contact between the first and second fasteners, ensuring the tightening effect after adjustment and avoiding problems such as handlebar tilting or insufficient locking strength caused by improper adjustment. Overall, this technical solution significantly improves the ease of use and safety of the handlebar stem assembly.

[0013] Preferably, the adjustment seat is arranged as a single unit in the second direction. When the adjustment seat is arranged as a single unit, the adjustment seat is located between the first fastener and the second fastener, and the handle head has a rotation hole on the side near the tip of the adjustment seat for the adjustment knob to rotate.

[0014] By adopting the above technical solution, the adjustment seat is positioned as a single unit between the first and second fasteners, allowing the adjustment knob to more precisely control the relative distance or proximity of the first and second fasteners, thereby achieving precise adjustment of the handlebar head. Simultaneously, the rotating hole on the handlebar head facilitates the rotation of the adjustment knob, improving the convenience and reliability of the adjustment process.

[0015] Preferably, two adjustment seats are provided in the second direction. When two adjustment seats are provided, the adjustment seats are located on both sides of the first fastener and the second fastener. The two adjustment seats are arranged opposite each other and their tips are close to each other. The two opposite adjustment seats are adjusted to move closer to each other or further away from each other by adjusting the adjustment knob, thereby adjusting the first fastener and the second fastener to move closer to each other or further away from each other.

[0016] By adopting the above technical solution, two adjustment seats are positioned opposite each other in the second direction with their tips close together. This effectively disperses the adjustment force, avoiding stress concentration caused by a single adjustment point, and improving the stability and reliability of the adjustment process. The adjustment knob adjusts the distance between the first and second fasteners by moving the two opposing adjustment seats closer together or further apart. This design makes the adjustment process smoother, reduces potential twisting during adjustment, and ensures the straightness and stability of the handlebars. Compared to a single adjustment seat design, the dual adjustment seats provide better support during adjustment, enhance the rigidity of the entire device, improve locking strength, and reduce the risk of wear from repeated adjustments.

[0017] Preferably, when two adjustment seats are provided, guide plates are provided between the two adjustment seats, and the two guide plates are staggered and fitted together.

[0018] By adopting the above technical solution, guide plates are set between the two adjusting seats, and the two guide plates are staggered and fitted together, which can effectively prevent the offset during the adjustment process and ensure that the first fastener and the second fastener remain stable when they are close to or far from each other, thereby improving the adjustment accuracy and reliability.

[0019] Preferably, the adjusting component includes an adjusting knob and an adjusting seat. The adjusting seat has two guide grooves that are close to or far apart from each other. The first fastener and the second fastener are provided with guide blocks that move along the guide grooves. The adjusting knob adjusts the adjusting seat to move in the second direction. The first fastener and the second fastener are close to or far apart from each other.

[0020] By adopting the above technical solution, the adjusting component includes an adjusting knob and an adjusting seat. The adjusting seat has two guide grooves that move closer or further apart from each other. Guide blocks that move along the guide grooves are provided on the first and second fasteners. The adjusting knob adjusts the adjusting seat to move in a second direction, causing the first and second fasteners to move closer or further apart. This design enables precise adjustment, ensuring handlebar stability and ease of adjustment, avoiding the twisting and insufficient locking problems that may occur in traditional adjustment methods, and improving the user's riding experience.

[0021] Preferably, the two guide grooves are configured to be wider at the ends of the first fastener and / or the second fastener and narrower near the middle.

[0022] By adopting the above technical solution, the two guide grooves are designed to be wider at the ends and narrower near the middle. The main purpose is to achieve smoother guiding movement, enhance the stability of the fasteners, and optimize the compactness of the overall structure. Through the design of widening and narrowing, the space required for the overall structure can be reduced without sacrificing stability, making the device more compact and lightweight.

[0023] Preferably, guide grooves are provided on both the top and bottom surfaces of the adjustment seat.

[0024] By adopting the above technical solution, guide grooves are provided on both the top and bottom surfaces of the adjustment seat, so that the components that cooperate with it can obtain precise guidance in both the vertical and horizontal directions, thereby improving the motion accuracy and stability of the overall structure.

[0025] Secondly, this application provides a bicycle including a frame, wheels, and a seat, characterized in that the handlebars on the frame are adjustable via an adjustable stem device, wherein the adjustable stem device is constructed according to any of the structures described in the first aspect.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. By adjusting the distance between the first and second fasteners using the adjusting component, the height and angle of the handlebars can be adjusted simultaneously, improving adjustment efficiency and precision, avoiding the twisting problem during handlebar adjustment in traditional methods, and ensuring riding safety and comfort.

[0028] 2. The adjustment knob controls the movement of the adjustment seat, allowing the first and second fasteners to move precisely closer or further apart, simplifying the adjustment process, eliminating the need for additional tools, and improving the user experience.

[0029] 3. The design of the inclined plane and beveled surface reduces friction and resistance, improves the smoothness and stability of adjustment, enhances the load-bearing capacity and service life of the structure, and ensures that it can maintain good performance after multiple adjustments. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of an adjustable handle head device.

[0031] Figure 2 This is a schematic diagram of the structure of an adjustable stand-up device after the stand-up head has been cut open.

[0032] Figure 3 This is a structural diagram when the adjusting components are quick-release screws and spring-loaded components.

[0033] Figure 4 This is a schematic diagram of the structure when the adjustment seat is a single unit. Figure 1 .

[0034] Figure 5 This is a schematic diagram of the structure when the adjustment seat is a single unit. Figure 2 .

[0035] Explanation of reference numerals in the attached drawings: 1. Handlebar stand; 2. Handlebar head; 3. Adjustment tension device; 31. First fastener; 311. Guide block; 32. Second fastener; 33. Adjusting component; 331. Adjustment knob; 332. Adjustment seat; 3321. Guide groove; 3322. First inclined surface; 3323. Guide plate; 333. Quick release screw; 34. Compression spring; 4. Handlebar crossbar. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0037] This application discloses an adjustable handlebar head device.

[0038] Reference Figure 1 An adjustable handlebar stem assembly includes a handlebar seat 1, a handlebar stem 2, and an adjusting tension device 3. The handlebar seat 1 is fixedly connected to the bicycle frame. One end of the handlebar stem 2 is rotatably connected to the handlebar seat 1, and the other end is rotatably connected to the handlebar crossbar 4. The adjusting tension device 3 includes a first fastener 31, a second fastener 32, and an adjusting member 33. The adjusting member 33 adjusts the tension between the first fastener 31 and the second fastener 32 and the handlebar seat 1 and the handlebar crossbar 4 by adjusting the first fastener 31 and the second fastener 32 to move closer or further apart.

[0039] Specifically, the stem 1 is made of high-strength aluminum alloy, which has good corrosion resistance and is lightweight. The stem 1 includes a first connector, a second connector, and a center rod. The first connector is a round tube that is sleeved on the frame, the second connector is a round tube perpendicular to the first connector, and the center rod is a round tube welded between the first connector and the second connector. The second connector has the same diameter as the connection point between it and the handlebar 4.

[0040] The handlebar stem 2 is made of the same material as the handlebar base 1 to ensure the strength and durability of the overall structure. The handlebar stem 2 has a long groove in the middle, with one end fitted onto the second connector and the other end fitted onto the handlebar crossbar 4. The top and bottom surfaces of the handlebar stem 2 have clearance holes for the movement of the center rod, so as to avoid interference with the center rod when adjusting the position of the handlebar crossbar 4 through the handlebar stem 2.

[0041] Reference Figure 2 The first fastener 31 and the second fastener 32 can be made of stainless steel to increase corrosion resistance and strength.

[0042] Specifically, the first fastener 31 and the second fastener 32 have the same structure and are set in a U shape. The two sides of the U shape are provided with semi-circular grooves that fit with the second connector and / or the handlebar 4. The tightness between the handlebar head 2 and the second connector and / or the handlebar 4 is adjusted by controlling the tightness of the fit between the semi-circular groove and the second connector and / or the handlebar 4.

[0043] Adjusting component 33 adjusts the first fastener 31 and the second fastener 32 to move closer to or further away from each other, including adjusting knob 331 and adjusting seat 332.

[0044] Reference Figure 3 In one embodiment, the adjusting seat 332 has first inclined surfaces 3322 on both sides opposite to the first fastener 31 and the second fastener 32. The first fastener 31 and the second fastener 32 each have second inclined surfaces that abut against the first inclined surfaces 3322. A compression spring 34 is provided between the first fastener 31 and the second fastener 32 and the handle head 2, and the compression spring 34 pushes the first fastener 31 and the second fastener 32 closer together. The direction in which the first fastener 31 and the second fastener 32 move closer or further apart is the first direction, and the direction perpendicular to the first direction is the second direction. One end of the adjusting knob 331 is connected to a screw, and by rotating the screw, the first inclined surfaces 3322 push the first fastener 31 and the second fastener 32 further apart along the first direction to achieve a fastening effect when the adjusting seat 332 moves along the second direction.

[0045] In one specific embodiment, the adjustment knob 331 can be configured as a hexagonal bolt head that can be turned with a wrench, or it can be configured as a Torx handle head, making it convenient for users to adjust themselves. One end of the adjustment knob 331 is configured as a quick-release screw 333. By opening and closing the quick-release screw 333, the position of the adjustment seat 332 is adjusted, thereby adjusting the first adjustment seat 332 and the second adjustment seat 332 to move closer or further apart, thereby achieving the tightness between the first fastener 31 and the second fastener 32 and the handle head 2.

[0046] Reference Figure 4 , Figure 5 In one specific embodiment, the adjusting member 33 is disposed on the side of the handlebar head 2 for adjustment from the side; in another specific embodiment, the adjusting member 33 is disposed on the top surface of the handlebar head 2 for adjustment from the top.

[0047] Specifically, the adjusting seat 332 can be configured as a single unit in the second direction. When the adjusting seat 332 is configured as a single unit, it is positioned between the first fastener 31 and the second fastener 32. A rotating hole for the adjusting knob 331 to rotate is provided on the side of the upright head 2 near the tip of the adjusting seat 332. The advantage of this design is that it can reduce the number of adjusting parts 33, simplify the structure, and reduce production costs.

[0048] Reference Figure 3 Alternatively, two adjustment seats 332 can be provided in the second direction. When two adjustment seats 332 are provided, they are located on both sides of the first fastener 31 and the second fastener 32, with the two adjustment seats 332 facing each other and their tips close together. By adjusting the knob 331, the two facing adjustment seats 332 can be moved closer or further apart, thereby adjusting the first fastener 31 and the second fastener 32 to move closer or further apart. The advantage of this design is that it can increase the stability of the adjustment and avoid the handlebar twisting during the adjustment process.

[0049] Furthermore, when two adjusting seats 332 are provided, guide plates 3323 are positioned between the two adjusting seats 332, with the two guide plates 3323 staggered and fitted together vertically. This design can further improve the accuracy and stability of the adjustment and prevent deviation during the adjustment process.

[0050] Reference Figure 2In another embodiment, the adjusting member 33 may further include an adjusting knob 331 and an adjusting seat 332. The adjusting seat 332 has two guide grooves 3321 that are either close to or far apart from each other. The first fastener 31 and the second fastener 32 are provided with guide blocks 311 that move along the guide grooves 3321. The adjusting knob 331 adjusts the adjusting seat 332 to move in a second direction, causing the first fastener 31 and the second fastener 32 to move closer to or further apart from each other. This design allows for more precise adjustment and is suitable for high-precision requirements.

[0051] Specifically, the two guide grooves 3321 can be configured to be wider at the ends of the first fastener 31 and / or the second fastener 32 and narrower near the middle. The main purpose of this design is to achieve smoother guiding movement, enhance the stability of the fasteners, and optimize the compactness of the overall structure. By using a widening and narrowing design, the space required for the overall structure can be reduced without sacrificing stability, making the device more compact and lightweight.

[0052] Specifically, the width of the guide groove 3321 gradually decreases from the end to the middle. This gradient design ensures that the first fastener 31 and the second fastener 32 are always subjected to a uniform guiding force during movement, thereby reducing friction and vibration. The guide blocks 311 on the first fastener 31 and the second fastener 32 also adopt a corresponding gradient design to ensure a perfect fit with the guide groove 3321.

[0053] Furthermore, guide grooves 3321 can be provided on both the top and bottom surfaces of the adjusting seat 332. This design can further improve the stability and reliability of the adjustment, and prevent deviation or jamming during the adjustment process.

[0054] The implementation principle of the adjustable handlebar stem device in this application embodiment is as follows: by adjusting the knob 331 to move the adjusting seat 332 along the second direction, the first fastener 31 and the second fastener 32 move closer or further apart, thereby adjusting the tightness between the handlebar stem 2, the handlebar seat 1, and the handlebar crossbar 4. This design can effectively solve the problems of inconvenient adjustment and unreliable locking in the prior art, improving riding safety and comfort. Especially for children and teenagers, this adjustable handlebar stem device can be flexibly adjusted according to their height and riding habits, extending the service life of the bicycle and reducing resource waste.

[0055] This application also discloses a bicycle. The bicycle includes a frame, wheels, and a seat. Of course, the bicycle may also have other components, the specific forms of which can be as shown in any other prior art; for the sake of brevity, this application will not provide redundant descriptions. The bicycle handlebars are adjusted via a handlebar stem 2, which includes the components described above. Figure 1-3As shown, this application will not repeat the description here.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An adjustable handlebar head device, characterized in that: include: The handlebar stand (1) is fixedly connected to the bicycle frame; The handlebar head (2) is rotatably connected at one end to the handlebar seat (1) and at the other end to the handlebar crossbar (4). The tension adjustment device (3) includes a first fastener (31), a second fastener (32), and an adjusting member (33). The first fastener (31) abuts against the handlebar seat (1), and the second fastener (32) abuts against the handlebar crossbar (4). The adjusting member (33) is located in the middle of the first fastener (31) and the second fastener (32). The adjusting member (33) adjusts the tension between the first fastener (31) and the handlebar seat (1) and between the second fastener (32) and the handlebar crossbar (4) by adjusting the first fastener (31) and the second fastener (32) to move closer or further apart from each other.

2. The adjustable handlebar head device according to claim 1, characterized in that: The adjusting component (33) includes an adjusting knob (331) and an adjusting seat (332). The adjusting seat (332) has first inclined surfaces (3322) on both sides opposite to the first fastener (31) and the second fastener (32). The first fastener (31) and the second fastener (32) each have second inclined surfaces that abut against the first inclined surfaces (3322). A compression spring is provided between the first fastener (31) and the second fastener (32) and the handlebar head (2), and the handlebar head is pushed by the compression spring. The first fastener (31) and the second fastener (32) are close to each other. The direction in which the first fastener (31) and the second fastener (32) are close to each other or far apart is the first direction, and the direction perpendicular to the first direction is the second direction. One end of the adjusting knob (331) is connected to a screw, and the first inclined surface (3322) pushes the first fastener (31) and the second fastener (32) away from each other in the first direction to achieve a fastening effect when the adjusting seat (332) moves in the second direction by rotating the screw.

3. The adjustable handlebar head device according to claim 2, characterized in that: The adjustment seat (332) is set as a single unit in the second direction. When the adjustment seat (332) is set as a single unit, the adjustment seat (332) is located in the middle position between the first fastener (31) and the second fastener (32). The handle head (2) has a rotating hole on the side near the tip of the adjustment seat (332) for the adjustment knob (331) to rotate.

4. The adjustable handlebar head device according to claim 2, characterized in that: Two adjustment seats (332) are provided in the second direction. When two adjustment seats (332) are provided, the adjustment seats (332) are located on both sides of the first fastener (31) and the second fastener (32). The two adjustment seats (332) are arranged opposite each other and their tips are close to each other. The adjustment knob (331) is used to adjust the two opposite adjustment seats (332) to move closer to each other or further away from each other, thereby adjusting the first fastener (31) and the second fastener (32) to move closer to each other or further away from each other.

5. The adjustable handlebar head device according to claim 4, characterized in that: When two adjustment seats (332) are provided, guide plates (3323) are provided between the two adjustment seats (332) and the two guide plates (3323) are staggered and attached to each other.

6. The adjustable handlebar head device according to claim 1, characterized in that: The adjusting component (33) includes an adjusting knob (331) and an adjusting seat (332). The adjusting seat (332) has two guide grooves (3321) that are close to or far apart from each other. The first fastener (31) and the second fastener (32) are provided with guide blocks (311) that move along the guide grooves (3321). The adjusting knob (331) adjusts the adjusting seat (332) to move in a second direction. The first fastener (31) and the second fastener (32) are close to or far apart from each other.

7. The adjustable handlebar head device according to claim 6, characterized in that: The two guide grooves (3321) are configured to be wider at the ends of the first fastener (31) and / or the second fastener (32) and narrower near the middle.

8. The adjustable handlebar head device according to claim 6, characterized in that: The top and bottom surfaces of the adjustment seat (332) are provided with guide grooves (3321).

9. A bicycle, comprising a frame, wheels, and a seat, characterized in that, The handlebars on the frame are adjustable via an adjustable stem device as described in any one of claims 1-8.

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