Rapid handlebar stem adjusting structure and bicycle

Abstract

The invention provides a rapid handlebar adjusting structure and relates to the technical field of bicycles. The rapid handlebar adjusting structure comprises a handlebar and a vertical pipe, and the inserting end of the bottom of the handlebar is suitable for being inserted from a top opening of the vertical pipe; a first tooth structure is arranged on the side wall of the stem in the vertical direction; the quick stem adjusting structure further comprises a positioner assembled on the vertical pipe, the positioner comprises a height positioning block and a locking structure, the height positioning block can reciprocate in the radial direction of the vertical pipe, and first clamping teeth are arranged at the end, facing the stem, of the height positioning block. The locking structure is arranged to be capable of applying locking force to the side, away from the handlebar stem, of the height positioning block. When the stem is inserted into the expected position of the vertical pipe, the locking structure can apply locking force to the height positioning block to enable the height positioning block to move towards the stem, and the first clamping teeth and the first tooth structure are in clamping fit, so that the stem cannot move in the vertical direction of the vertical pipe. The defect that the height of the stem and the height of the vertical pipe are inconvenient to adjust in the prior art is overcome.

Description

Technical Field

[0001] The present application relates to the technical field of bicycles, and in particular to a handlebar quick adjustment structure and a bicycle. Background Art

[0002] The stem and riser of a bicycle are key components for controlling the steering of a bicycle. The stem, also known as the handlebar, is the part that connects the handlebar and the front fork, while the riser is the tubular structure on the top of the front fork that is used to fix the stem. The stem is usually made of aluminum alloy or carbon fiber, and is lightweight and durable. In daily use, the height of the stem can usually be adjusted according to the needs of the rider to provide optimal control and comfort.

[0003] In traditional designs, the connection between the stem and the seat tube is usually achieved through screws and wedge nuts. Although this fixing method can provide sufficient stability, when the user needs to adjust the height of the stem, tools are required for auxiliary operation. If there are no suitable tools, the height of the stem cannot be adjusted. Therefore, the traditional design has the defect that the height between the stem and the seat tube is not easy to adjust. Summary of the invention

[0004] The purpose of the present application is to provide a quick-adjustment structure for a stem and a bicycle, aiming to solve the defect of the inconvenience of adjusting the height of the stem and the seat tube in the related art.

[0005] Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

[0006] According to a first aspect of the present application, a stem quick adjustment structure is provided.

[0007] It comprises a stem and a riser, wherein the insertion end of the stem bottom is suitable for being inserted from the top opening of the riser;

[0008] The side wall of the stem is vertically provided with a first tooth structure;

[0009] The stem quick adjustment structure also includes a positioner mounted on the stem, the positioner includes a height positioning block, a locking structure and a positioner body, the positioner body is fixedly sleeved on the top of the stem, a first sliding cavity for mounting the height positioning block is provided on one side of the positioner body, the height positioning block is configured to be reciprocatingly movable along the radial direction of the stem in the first sliding cavity, the locking structure is mounted on the positioner body on the side of the height positioning block away from the stem, a first latch is provided on one end of the height positioning block of the stem facing the stem, and the locking structure is configured to be able to apply a locking force on the side of the height positioning block away from the stem;

[0010] When the stem is inserted into the expected position of the seat tube, the locking structure can apply the locking force to the height positioning block so that the height positioning block moves toward the stem and the first latching tooth forms a latching fit with the first tooth structure, so that the stem cannot move in the vertical direction of the seat tube.

[0011] In an exemplary embodiment of the present application, the side wall of the stem is further provided with a second tooth structure in the vertical direction, and the second tooth structure and the first tooth structure are staggered in the circumferential direction of the side wall of the stem;

[0012] The positioner further comprises an indicating height positioning block and a biasing member cooperating with the second tooth structure, wherein the indicating height positioning block is configured to be able to move in a radial direction of the seat tube toward the stem and away from the stem, a second latching tooth is provided at one end of the indicating height positioning block facing the stem, and the biasing member is configured to be able to apply a biasing force on a side of the indicating height positioning block away from the stem;

[0013] The height indicating positioning block extends toward the interior of the seat tube under the biasing force of the biasing member. When the stem overcomes the biasing force and is inserted into the seat tube, the second tooth structure of the stem cooperates with the second latching tooth of the height indicating positioning block to emit a positioning indicating sound.

[0014] In an exemplary embodiment of the present application, the positioning indication sound is configured such that when the positioning indication sound is emitted, the tooth tip / tooth groove of the first locking tooth of the height positioning block is aligned with the tooth groove / tooth tip of the first tooth structure of the stem in the moving direction of the height positioning block.

[0015] In an exemplary embodiment of the present application, the first tooth structure and the second tooth structure are tooth structures integrally machined on the side wall of the stem.

[0016] In an exemplary embodiment of the present application, the locking structure is located on a side of the height positioning block away from the stem, the locking structure includes a raised portion and a non-raised portion, and the locking structure has a locked position and an unlocked position. In the locked position, the raised portion is toward the height positioning block and applies the locking force to push the height positioning block toward the stem so that the first locking tooth is engaged with the first tooth structure. In the unlocked position, the non-raised portion is toward the height positioning block and a movable gap is left between the non-raised portion and the height positioning block, and the height positioning block can move between the movable gap.

[0017] In an exemplary embodiment of the present application, the locking structure includes a rotating part and an operating part, the rotating part and the operating part are fixedly connected or an integral structure, the rotation axis of the rotating part and the moving direction of the height positioning block are perpendicular to each other in the same horizontal plane, the raised part and the non-raised part are both arranged on the circumferential side wall of the rotating part, and the operating part is used to operate the rotating part to rotate.

[0018] In an exemplary embodiment of the present application, the biasing member is a compression spring mounted on the side of the height indicating positioning block away from the stem, and the biasing force is an elastic force applied by the compression spring to the side of the height indicating positioning block away from the stem in the direction of the stem.

[0019] In an exemplary embodiment of the present application,

[0020] The locator body is provided with a second sliding cavity at a position offset from the first sliding cavity in the circumferential direction, the indicating height positioning block is reciprocatingly arranged in the second sliding cavity, the compression spring is assembled on the side of the indicating height positioning block away from the stem, one end of the compression spring abuts against the end of the indicating height positioning block away from the stem, and the other end abuts against the closing plate of the second sliding cavity on the side away from the stem.

[0021] In an exemplary embodiment of the present application, the positioner further comprises a safety component disposed between the operating portion and the positioner body and used for locking the operating portion to the locking position.

[0022] In an exemplary embodiment of the present application,

[0023] The operating part is a flippable handle. When the handle is flipped to a horizontal position, the handle and the rotating part are in the unlocking position. When the handle is flipped to a vertical position, the handle and the rotating part are in the locking position. A through hole is provided on the handle.

[0024] The insurance component includes:

[0025] A safety screw sleeve is fixedly arranged on the positioner body, and the position of the safety screw sleeve is aligned with the through hole on the handle flipped to the vertical position;

[0026] The safety bolt passes through the through hole of the handle and is screwed into the safety screw sleeve to lock the handle on the positioner body when the handle is flipped to the vertical position.

[0027] In an exemplary embodiment of the present application, the cross section of the stem is matched to the cross section of the lumen in the seat tube and both are non-circular.

[0028] In an exemplary embodiment of the present application, at least one pair of positioning edges are provided on the side wall of the stem and the tube cavity wall of the riser for aligning the two at preset positions in the circumferential direction.

[0029] In an exemplary embodiment of the present application, the positioner body also includes a base and a pedestal, the first sliding cavity and the second sliding cavity are both formed on the base, the pedestal is located below the base, the pedestal is detachably connected to the base, a through hole is penetrated through the base and matched with the shape of the outer wall of the vertical pipe, the vertical pipe passes through the through hole, a first positioning portion is provided on the circumferential side wall of the vertical pipe, and a second positioning portion is provided on the base in the through hole and matched with the first positioning portion by snap-fitting, and the base and the vertical pipe are relatively fixed in the horizontal direction through the snap-fitting cooperation between the first positioning portion and the second positioning portion.

[0030] In an exemplary embodiment of the present application, a shock absorbing spring is installed at the bottom of the seat tube, and after the stem and the seat tube are quickly assembled, the insertion end of the stem bottom abuts against the shock absorbing spring.

[0031] According to a second aspect of the present application, a bicycle is provided, comprising a handlebar quick adjustment structure as described in any one of the above.

[0032] The exemplary embodiments of the present application may have some or all of the following beneficial effects:

[0033] In a quick adjustment structure of a stem provided by an example embodiment of the present application, the stem is inserted into the stem and slid along the length direction of the stem until a certain position of the first tooth structure on the stem is aligned with the first tooth on the height positioning block, and then the locking structure is used to cause the height positioning block to move in the direction of the first tooth structure until the two are tightly engaged. In the engaged state, the locking structure effectively limits the further movement of the height positioning block, ensures the stable connection between the height positioning block and the first tooth structure, thereby achieving the fixation of the stem and the locator. In view of the fixed connection between the locator body and the stem, this operation directly achieves a stable lock between the stem and the stem. The stem can be freely slid by simply releasing the locking structure, and when sliding the stem, another certain position of the first tooth structure can be aligned with the height positioning block again. At this time, the locking structure is used again to cause the height positioning block to be re-engaged and fixed with the first tooth structure, thereby easily adjusting the height of the stem. Through the above structure, the operation process of adjusting the height of the stem is simplified, and no additional tools are required, which allows users to flexibly adjust the height between the stem and the stem.

[0034] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 An overall schematic diagram of a stem quick adjustment structure in an embodiment of the present application is shown;

[0037] Figure 2 A cross-sectional view of a stem quick adjustment structure in an embodiment of the present application is shown;

[0038] Figure 3 Shows Figure 2 A magnified view of part A;

[0039] Figure 4 A partial schematic diagram showing the plug-in relationship between the stem and the seat tube in the embodiment of the present application;

[0040] Figure 5 A partial schematic diagram showing the installation relationship between the base and the riser in an embodiment of the present application is shown.

[0041] Description of reference numerals:

[0042] 1. stem; 11. first tooth structure; 12. second tooth structure; 2. stem; 21. first positioning portion; 3. height positioning block; 31. first latching tooth; 4. locking structure; 41. raised portion; 42. non-raised portion; 43. rotating portion; 44. operating portion; 5. indicating height positioning block; 51. second latching tooth; 6. biasing member; 7. positioner body; 71. base; 72. base; 721. second positioning portion; 8. safety assembly; 81. safety screw sleeve; 82. safety bolt; 9. shock-absorbing spring. DETAILED DESCRIPTION

[0043] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present application will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed descriptions will be omitted. In addition, the drawings are only schematic illustrations of the present application and are not necessarily drawn to scale.

[0044] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the diagram to another component, these terms are used in this specification only for convenience, such as according to the direction of the examples in the drawings. It is understood that if the device of the diagram is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0045] The terms "a", "an", "the" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first" and "second" are used merely as labels and are not intended to limit the quantity of their objects.

[0046] like Figure 1 and Figure 2 As shown, in an embodiment of the present application, a quick adjustment structure of a stem is provided, comprising a stem 1 and a seat tube 2, wherein the insertion end at the bottom of the stem 1 is suitable for being inserted from the top opening of the seat tube 2; and a first tooth structure 11 is vertically provided on the side wall of the stem 1.

[0047] The stem quick adjustment structure further comprises a positioner mounted on the stem 2, the positioner comprising a height positioning block 3 and a locking structure 4, the height positioning block 3 is configured to be able to reciprocate along the radial direction of the stem 2, the height positioning block 3 is provided with a first latching tooth 31 at one end facing the stem 1, and the locking structure 4 is configured to be able to apply a locking force on a side of the height positioning block 3 away from the stem 1;

[0048] When the stem 1 is inserted into the expected position of the seat tube 2, the locking structure 4 can apply the locking force to the height positioning block 3 so that the height positioning block 3 moves toward the stem 1 and the first latching tooth 31 forms a latching fit with the first tooth structure 11, so that the stem 1 cannot move in the vertical direction of the seat tube 2.

[0049] In the embodiment of the present application, the stem 1 can slide along the length direction of the riser 2, so that the stem 1 can be adjusted to the expected position according to the needs of the user. During the adjustment process, the locking structure 4 does not apply a locking force to the height positioning block 3. Therefore, when the first tooth structure 11 on the stem 1 and the first latching tooth 31 on the height positioning block 3 are in contact at the tips of the teeth, the height positioning block 3 can be flexibly moved in a direction away from the first tooth structure 11 to ensure smooth adjustment of the stem 1. Once the user adjusts the stem 1 to the expected position, the locking structure 4 applies a locking force to the side of the height positioning block 3 away from the stem 1, so that the height positioning block 3 can move toward the direction of the first tooth structure 11 and engage with the first tooth structure 11 to achieve a stable fixing effect. At this time, a relatively fixed state is formed between the stem 1 and the riser 2, ensuring the stability and safety of the user during use.

[0050] The above structure ensures good stability between the adjusted stem 1 and the seat tube 2, avoiding looseness or shaking during use, thereby improving the safety of the stem 1 during use. On the other hand, the user can also use the locking structure 4 to make the height positioning block 3 and the first tooth structure 11 form a snap fit at different positions, thereby adjusting the height between the stem 1 and the seat tube 2. When adjusting the height of the stem 1, the user does not need to rely on auxiliary tools when adjusting the height of the stem 1, simplifying the adjustment process, thereby providing more convenience for the user.

[0051] In the embodiment of the present application, in order to improve the damping feeling during the sliding process of the stem 1, and further assist the user to accurately align the slot of the first tooth structure 11 with the tooth tip of the height positioning block 3. Therefore, the side wall of the stem 1 is also provided with a second tooth structure 12 in the vertical direction, and the second tooth structure 12 and the first tooth structure 11 are staggered in the circumferential direction of the side wall of the stem 1. In the present application, the first tooth structure 11 and the second tooth structure 12 are relatively arranged on both sides of the stem 1, which is of course not restrictive. However, it is worth noting that the size specifications of the first tooth structure 11 and the second tooth structure 12 should be exactly the same, and the tooth tips of the two should be aligned in the circumferential direction of the stem 1, and the tooth grooves of the two should also be aligned in the circumferential direction of the stem 1.

[0052] Furthermore, the positioner also includes an indicating height positioning block 5 and a biasing member 6 that cooperate with the second tooth structure 12. The indicating height positioning block 5 can move along the radial direction of the seat tube 2 toward the stem 1, and can also move away from the stem 1. The indicating height positioning block 5 is provided with a second latching tooth 51 at one end facing the stem 1, and the second latching tooth 51 is engaged and adapted with the second tooth structure 12. The biasing member 6 can apply a biasing force to the side of the indicating height positioning block 5 away from the stem 1, so that the indicating height positioning block 5 can extend into the interior of the seat tube 2 under the biasing force applied by the biasing member 6.

[0053] When the stem 1 is inserted into the seat tube 2, as the tooth tips of the second tooth structure 12 gradually align with the tooth tips of the second latching teeth 51, the force exerted by the second tooth structure 12 on the stem 1 on the height indicating positioning block 5 will exceed the biasing force of the biasing member 6, prompting the height indicating positioning block 5 to move away from the stem 1. When the tooth tips of the second latching teeth 51 are precisely aligned with the tooth grooves, the height indicating positioning block 5 can move toward the stem 1 under the action of the biasing force, achieving the engagement of the second latching teeth 51 with the second tooth structure 12. This process forms a preliminary fixation of the stem 1 and triggers a "click" positioning indication sound, providing intuitive auditory feedback for the operator.

[0054] Therefore, when the user hears a crisp "click" sound during the process of adjusting the stem 1, it means that the tooth tip of the first tooth structure 11 and the tooth groove of the first latching tooth 31 have reached an aligned state in the moving direction. Of course, at this time, the tooth groove of the first tooth structure 11 and the tooth knot of the first latching tooth 31 have also reached an aligned state in the moving direction, thereby ensuring the accuracy of positioning and the convenience of operation.

[0055] In addition, through the friction between the second latch tooth 51 and the second tooth structure 12, the stem 1 has a damping feeling when sliding in the seat tube 2. When the second latch tooth 51 and the second tooth structure 12 are in a latching state, the stem 1 can obtain a preliminary fixing effect. Even without applying external force, the stem 1 can maintain a stable state, which provides convenience for the user to adjust the height positioning block 3, thereby simplifying and optimizing the fixing operation of the stem 1.

[0056] In the embodiment of the present application, the first tooth structure 11 and the second tooth structure 12 are tooth structures integrally processed on the side wall of the stem 1. In this way, not only the first tooth structure 11 and the second tooth structure 12 are accurately aligned on the circumferential surface of the stem 1, but also the processing flow of the stem 1 is simplified, and the production efficiency and cost-effectiveness are improved. Of course, this is not restrictive, and the first tooth structure 11 and the second tooth structure 12 can also be fixed to the side wall of the stem 1 by other means, such as by welding to firmly install the rack with the first tooth structure 11 and the second tooth structure 12 on the side wall of the stem 1.

[0057] In the implementation of the present application, the locking structure 4 is arranged on the side of the height positioning block 3 away from the first tooth structure 11, and the height positioning block 3 can be fixed and unlocked by changing the state of the locking structure 4 through intuitive and convenient operation. The locking structure 4 includes a raised portion 41 and a non-raised portion 42; the locking structure 4 also has a locked position and an unlocked position.

[0058] Specifically, in the locked position, the raised portion 41 is located on the side facing the height positioning block 3, applying a locking force to the height positioning block 3, pushing it to move toward the stem 1, ensuring that the first latching tooth 31 and the first tooth structure 11 are firmly engaged, and the height positioning block 3 cannot move, thereby achieving a locked state. In the unlocked position, the non-raised portion 42 is located on the side facing the height positioning block 3, forming a movable gap between the two, allowing the height positioning block 3 to move freely in the movable gap.

[0059] Therefore, after the user adjusts the stem 1 to the desired position, the user only needs to adjust the raised portion 41 toward the height positioning block 3. At this time, the height positioning block 3 can be locked and the first latching tooth 31 and the first tooth structure 11 can be engaged, thereby obtaining a fixed state of the stem 1. When the user needs to adjust the height of the stem 1 or disassemble the stem 1, the user only needs to adjust the non-raised portion 42 toward the height positioning block 3. At this time, the height positioning block 3 will be in an unlocked state. When the user slides the stem 1, the tooth tips of the first tooth structure 11 gradually abut against the tooth knots of the first latching teeth 31, and the height positioning block 3 can be automatically moved toward the movable gap, so that the stem 1 can move smoothly.

[0060] Furthermore, the locking structure 4 includes a rotating part 43 and an operating part 44, which are closely connected in a relatively fixed manner, ensuring the stability and reliability of the operation. The rotating part 43 and the operating part 44 can be connected in various ways, which can be achieved by fixed connection means such as pasting and welding, or by using integrated processing technology to integrate the two into a whole, ensuring the firmness of the structure and the convenience of operation. The rotation axis of the rotating part 43 and the moving direction of the height positioning block 3 form a vertical relationship on the horizontal plane, ensuring that the rotating part 43 can accurately control the movement of the height positioning block 3 when rotating. The raised part 41 and the non-raised part 42 are both arranged on the circumferential side wall of the rotating part 43.

[0061] In actual operation, the user only needs to hold the operating part 44 to easily drive the rotating part 43 to rotate. When the raised part 41 of the rotating part 43 rotates to face the height positioning block 3, the height positioning block 3 can be accurately pushed to move in the direction of the first tooth structure 11, so that the first clamping tooth 31 is tightly engaged with the first tooth structure 11 to achieve a stable fixing effect. At this time, the height positioning block 3 is locked and fixed and cannot move freely, thereby ensuring a firm connection between the stem 1 and the seat tube 2. On the contrary, when the non-raised part 42 of the rotating part 43 rotates to face the height positioning block 3, a movable gap is formed between the height positioning block 3 and the non-raised part 42, which enables the height positioning block 3 to move freely between the first tooth structure 11 and the non-raised part 42, thereby easily releasing the fixation of the height positioning block 3 and realizing the unlocking of the height positioning block 3. The stem 1 can be adjusted in height along the length direction of the seat tube 2, providing great convenience and flexibility for the user.

[0062] In the embodiment of the present application, when the operating portion 44 is rotated to a vertical downward position, the raised portion 41 is located exactly on the side facing the height positioning block 3. This state clearly indicates that the stem 1 is in a locked state, ensuring a stable connection between the stem 1 and the seat tube 2, and providing a safe and reliable guarantee for the user. On the contrary, when the operating portion 44 is rotated to a horizontal state, the non-raised portion 42 turns to the side of the height positioning block 3. At this time, the stem 1 is in an unlocked state, allowing the user to easily adjust the height of the stem 1 according to personal needs, adding more flexibility and comfort to the use experience. It is worth noting that the above-mentioned operation method is not the only option. Users can explore more personalized operation modes according to actual needs and habits to achieve the best use effect.

[0063] In the embodiment of the present application, the biasing member 6 is configured as a compression spring, and the height indicating positioning block 5 is provided with a spring installation cavity on the side away from the stem 1, and the compression spring is installed in the spring installation cavity. Therefore, it can be understood that the biasing force provided by the compression spring is located on the side of the height indicating positioning block 5 away from the stem 1. Specifically, the biasing force is configured as an elastic force in the direction of the stem 1, and the biasing force applied by the biasing member 6 to the height indicating positioning block 5 is an elastic force. Of course, this setting option is not an absolute limitation.

[0064] In the embodiment of the present application, the positioner further comprises a positioner body 7, which is relatively fixed to the top of the riser 2, ensuring the stability and reliability of the overall structure. The stem 1 passes through the positioner body 7 and is slidably connected to the positioner body 7 along the vertical direction, so that the stem 1 can slide freely in the vertical direction. The interior of the positioner body 7 is provided with a first sliding cavity and a second sliding cavity, and the first sliding cavity and the second sliding cavity are staggered with each other in the circumferential direction.

[0065] The height positioning block 3 is located in the first sliding cavity, and the height positioning block 3 can slide back and forth in the first sliding cavity, and the locking structure 4 is installed on the positioner body 7 on the side of the height positioning block 3 away from the stem 1. The first sliding cavity provides a precise sliding space for the height positioning block 3, so that a sliding connection is formed between the height positioning block 3 and the positioner body 7, ensuring its smooth movement.

[0066] The indicating height positioning block 5 is located in the second sliding cavity, and the indicating height positioning block 5 can slide back and forth in the second sliding cavity. A closing plate for blocking the second sliding cavity is also provided in the locator body 7. The closing plate is located on the side of the compression spring away from the indicating height positioning block 5, and the closing plate is fixedly connected to the locator body 7. Its function is to block the second sliding cavity to prevent the second positioning block and the compression spring from falling off. At the same time, one end of the compression spring abuts against the end of the indicating height positioning block 5 away from the stem 1, and the other end abuts against the closing plate on the side of the second sliding cavity away from the stem 1. The closing plate provides a stable support point for the compression spring. The second sliding cavity provides a precise sliding space for the indicating height positioning block 5, so that a sliding connection is formed between the indicating height positioning block 5 and the locator body 7, ensuring its smooth movement.

[0067] In the embodiment of the present application, in order to further improve the safety of the stem 1 and the seat tube 2 in a fixed state and prevent instability caused by accidental rotation of the locking structure 4, the stem quick adjustment structure in the present application also includes a safety component 8; the safety component 8 includes a safety screw sleeve 81 and a safety bolt 82. Through the threaded cooperation between the safety screw sleeve 81 and the safety bolt 82, the stability and safety of the height positioning block 3 and the first tooth structure 11 in the clamping state are improved.

[0068] Further, the operating portion 44 is regarded as a reversible handle. When the handle is flipped to a horizontal position, the handle and the rotating portion 43 are in an unlocked position. When the handle is flipped to a vertical position, the handle and the rotating portion 43 are in a locked position. A through hole is provided on the handle.

[0069] Specifically, the safety screw sleeve 81 is fixedly connected to the positioner body 7 , the safety bolt 82 passes through the through hole on the handle and is rotatably connected to the handle, and the safety bolt 82 is threadedly connected to the safety screw sleeve 81 , thereby providing safety protection for the stem 1 .

[0070] When the stem 1 and the seat tube 2 are in a fixed state and the operating portion 44 of the locking structure 4 is rotated to a vertical state, the safety bolt 82 is just aligned with the safety screw sleeve 81. At this time, tightening the safety bolt 82 is not only simple to operate, but also ensures that the locking structure 4 cannot rotate accidentally, thereby providing a solid safety guarantee for the stem 1 in daily use and avoiding safety hazards caused by accidental sliding of the stem 1.

[0071] In the embodiment of the present application, the cross section of the stem 1 is adapted to the cross section of the tube cavity in the seat tube 2 and both are non-circular. This prevents the first tooth structure 11 and / or the second tooth structure 12 of the stem 1 from being displaced from the first latching teeth 31 and / or the second latching teeth 51 respectively due to rotation during installation of the stem 1, thereby improving the accuracy of the position of the stem 1 and the seat tube 2 during installation.

[0072] In order to further ensure the accuracy of the position of the stem 1 when it is inserted into the riser 2, at least one pair of positioning edges are provided on the side wall of the stem 1 and the wall of the tube cavity of the riser 2 for aligning the two in a preset position in the circumferential direction. It can be understood that when the positioning edge of the stem 1 is aligned with the positioning edge of the riser 2 and inserted, the first tooth structure 11 is on the side facing the height positioning block 3, and the second tooth structure 12 is on the side facing the height indicating positioning block 5. In the embodiment of the present application, the cross section of the stem 1 and the cross section of the tube cavity in the riser 2 are both set to a square structure with chamfered corners on all four sides. However, this is not restrictive, and the cross section of the stem 1 and the cross section of the tube cavity in the riser 2 can also be semicircular, polygonal or anisotropic.

[0073] In the embodiment of the present application, the locator body 7 includes a base 71 and a base 72. The base 72 is located below the base 71. The base 72 and the base 71 are configured to be detachably connected. In the current embodiment, the base 71 and the base 72 are connected by bolts, which is of course not restrictive.

[0074] Furthermore, in order to achieve relative fixation between the base 72 and the standpipe 2 in the horizontal direction, a through hole is provided in the middle of the base 72, the top of the standpipe 2 passes through the through hole, the side wall of the standpipe 2 is processed with a first positioning portion, and the inner wall of the base 72 at the through hole is processed with a second positioning portion. The base 72 and the standpipe 2 are relatively fixed in the horizontal direction by the snap-fitting of the first positioning portion and the second positioning portion. Specifically, the first positioning portion is configured as a snap-fitting groove, which is configured on the side wall outside the standpipe 2, and the second positioning portion is configured as a snap-fitting portion that snaps with the snap-fitting groove, and the snap-fitting portion and the base 72 are an integral structure. Of course, this is not restrictive.

[0075] Furthermore, in order to achieve relative fixation between the base 72 and the riser 2 in the vertical direction, the riser 2 is threadedly connected with nuts on the upper and lower sides of the base 72. By tightening the two nuts, the base 72 cannot move in the vertical direction, thereby effectively ensuring the stability of the base 72.

[0076] In the embodiment of the present application, the stem quick adjustment structure also includes a shock-absorbing spring 9, which is installed inside the stem tube 2. After the stem 1 is inserted into the stem tube 2, the bottom of the stem 1 abuts against the shock-absorbing spring 9. The shock-absorbing spring 9 not only supports the stem 1, but also has a shock-absorbing effect on the stem 1.

[0077] In an embodiment of the present application, a bicycle is also provided, which includes the above-mentioned handlebar quick adjustment structure.

[0078] Those skilled in the art will easily think of other embodiments of the present application after considering the specification and practicing the embodiments of the present application. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that the present application does not apply for. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the appended claims.

Claims

1. A stem quick adjustment structure, characterized in that: It comprises a stem (1) and a seat tube (2), wherein the insertion end at the bottom of the stem (1) is suitable for being inserted from the top opening of the seat tube (2); The side wall of the stem (1) is vertically provided with a first tooth structure (11); The stem quick adjustment structure also includes a positioner mounted on the stem (2), the positioner including a height positioning block (3), a locking structure (4) and a positioner body (7), the positioner body (7) being fixedly sleeved on the top of the stem (2), a first sliding cavity for mounting the height positioning block (3) being provided on one side of the positioner body (7), the height positioning block (3) being arranged to be able to reciprocate along the radial direction of the stem (2) in the first sliding cavity, the locking structure (4) being installed on the positioner body (7) on the side of the height positioning block (3) away from the stem (1), the end of the height positioning block (3) facing the stem (1) being provided with a first latching tooth (31), the locking structure (4) being arranged to be able to apply a locking force on the side of the height positioning block (3) away from the stem (1); When the stem (1) is inserted into the expected position of the seat tube (2), the locking structure (4) can apply the locking force to the height positioning block (3) so that the height positioning block (3) moves toward the stem (1) and the first latching tooth (31) forms a latching fit with the first tooth structure (11), so that the stem (1) cannot move in the vertical direction of the seat tube (2).

2. The stem quick adjustment structure according to claim 1, characterized in that: The side wall of the stem (1) is also provided with a second tooth structure (12) in the vertical direction, and the second tooth structure (12) and the first tooth structure (11) are staggered in the circumferential direction of the side wall of the stem (1); The positioner further comprises an indicating height positioning block (5) and a biasing member (6) which cooperate with the second tooth structure (12); the indicating height positioning block (5) is configured to be able to move along the radial direction of the seat tube (2) toward the stem (1) and toward the stem (1); a second latching tooth (51) is provided at one end of the indicating height positioning block (5) facing the stem (1); and the biasing member (6) is configured to be able to apply a biasing force on a side of the indicating height positioning block (5) away from the stem (1); The height indicating positioning block (5) extends into the interior of the seat tube (2) under the action of the biasing force of the biasing member (6); when the stem (1) overcomes the biasing force and is inserted into the seat tube (2), the second tooth structure (12) of the stem (1) cooperates with the second latching tooth (51) of the height indicating positioning block (5) to emit a positioning indicating sound.

3. The stem quick adjustment structure according to claim 2, characterized in that: The positioning indication sound is configured such that when the positioning indication sound is emitted, the tooth tip / tooth groove of the first latch tooth (31) of the height positioning block (3) is aligned with the tooth groove / tooth tip of the first tooth structure (11) of the stem (1) in the moving direction of the height positioning block (3).

4. The stem quick adjustment structure according to claim 3, characterized in that: The first tooth structure (11) and the second tooth structure (12) are tooth structures integrally machined on the side wall of the stem (1).

5. A stem quick adjustment structure according to any one of claims 1 to 4, characterized in that: The locking structure (4) is located on a side of the height positioning block (3) away from the stem (1), and the locking structure (4) comprises a protruding portion (41) and a non-protruding portion (42). The locking structure (4) has a locking position and an unlocking position. In the locking position, the protruding portion (41) faces the height positioning block (3) and applies the locking force to push the height positioning block (3) toward the stem (1) so that the first latching tooth (31) is engaged with the first tooth structure (11). In the unlocking position, the non-protruding portion (42) faces the height positioning block (3) and a movable gap is left between the non-protruding portion (42) and the height positioning block (3), and the height positioning block (3) can move within the movable gap.

6. The stem quick adjustment structure according to claim 5, characterized in that: The locking structure (4) comprises a rotating part (43) and an operating part (44); the rotating part (43) and the operating part (44) are fixedly connected or integrally structured; the rotation axis of the rotating part (43) and the moving direction of the height positioning block (3) are perpendicular to each other in the same horizontal plane; the raised part (41) and the non-raised part (42) are both arranged on the circumferential side wall of the rotating part (43); and the operating part (44) is used to operate the rotating part (43) to rotate.

7. The stem quick adjustment structure according to claim 6, characterized in that: The biasing member (6) is a compression spring mounted on the side of the height indicating positioning block (5) away from the stem (1), and the biasing force is an elastic force applied by the compression spring to the side of the height indicating positioning block (5) away from the stem (1) in the direction of the stem (1).

8. The stem quick adjustment structure according to claim 7, characterized in that: The positioner body (7) is provided with a second sliding cavity at a position offset from the first sliding cavity in the circumferential direction, the indicating height positioning block (5) is reciprocatingly arranged in the second sliding cavity, the compression spring is assembled on the side of the indicating height positioning block (5) away from the stem (1), one end of the compression spring abuts against the end of the indicating height positioning block (5) away from the stem (1), and the other end abuts against the closing plate of the second sliding cavity on the side away from the stem (1).

9. The stem quick adjustment structure according to claim 8, characterized in that: The positioner further comprises a safety assembly (8) which is arranged between the operating portion (44) and the positioner body (7) and is used to lock the operating portion (44) to the locking position.

10. The stem quick adjustment structure according to claim 9, characterized in that: The operating portion (44) is a flippable handle. When the handle is flipped to a horizontal position, the handle and the rotating portion (43) are in the unlocking position. When the handle is flipped to a vertical position, the handle and the rotating portion (43) are in the locking position. A through hole is provided on the handle. The insurance component (8) comprises: A safety screw sleeve (81) is fixedly arranged on the positioner body (7), and the position of the safety screw sleeve (81) is aligned with the through hole on the handle flipped to the vertical position; A safety bolt (82) passes through the through hole of the handle and is screwed into the safety screw sleeve (81) to lock the handle on the positioner body (7) when the handle is flipped to the vertical position.

11. A stem quick adjustment structure according to any one of claims 1 to 4, characterized in that: The cross section of the stem (1) is adapted to the cross section of the lumen in the seat tube (2) and both are non-circular.

12. The stem quick adjustment structure according to claim 11, characterized in that: At least one pair of positioning edges are provided on the side wall of the stem (1) and the wall of the tube cavity of the riser (2) for aligning the two at preset positions in the circumferential direction.

13. The stem quick adjustment structure according to claim 8, characterized in that: The positioner body (7) further comprises a base (71) and a base (72), wherein the first sliding cavity and the second sliding cavity are both formed on the base (71), the base (72) is located below the base (71), and the base (72) is detachably connected to the base (71), the base (72) is penetrated by a through hole matching the shape of the outer wall of the vertical pipe (2), the vertical pipe (2) passes through the through hole, and the circumferential side wall of the vertical pipe (2) is provided with a second positioning portion (22) that is snap-fitted with the first positioning portion (21), and the base (72) is relatively fixed to the vertical pipe (2) in the horizontal direction through the snap-fitting of the first positioning portion (21) and the second positioning portion (22).

14. A stem quick adjustment structure according to any one of claims 1 to 4, characterized in that: A shock absorbing spring (9) is installed at the bottom of the seat tube (2); after the stem (1) and the seat tube (2) are quickly assembled, the insertion end of the bottom of the stem (1) abuts against the shock absorbing spring (9).

15. A bicycle, characterized in that: A handlebar quick adjustment structure comprising any one of claims 1-14.

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