Headset positioning device for a bicycle

Abstract

The utility model provides a bicycle's head bowl positioning device, it contains a positioning base, a pressing ring, an upper cover, a rotating ring, a positioning pin spare and an elastic piece. The front fork vertical pipe of bicycle is arranged in the head bowl positioning device and is driven to rotate by the vertical pipe, the front fork vertical pipe drives the pressing ring, the upper cover, the positioning pin spare and the elastic piece to rotate together, the user operates the rotating ring, makes the rotating ring rotate alone relative to the upper cover, pushes and pushes the positioning pin spare through the structure of guide groove, makes the positioning pin spare enter the positioning hole of positioning base, namely moves from an unlocking position to a locking position, makes the front fork vertical pipe and the vertical pipe be fixed in the specific position, reaches the effect of positioning, can avoid the condition that the bicycle is caused to fall because of the front wheel swing.

Description

Technical Field

[0001] This utility model relates to a bicycle handlebar positioning device, and more particularly to a positioning device for fixing the handlebars of a bicycle, which can keep the front wheel in a specific position when the bicycle is parked, preventing the bicycle from tipping over due to external impact or uneven ground. Background Technology

[0002] In general, bicycles are propelled forward by the front wheel. Therefore, even after a bicycle stops, the front wheel can still swerve freely to the left or right. If the bicycle isn't secured to a stable structure, uneven ground or unexpected impacts can easily cause the front wheel to deflect, leading to instability and the bicycle tipping over. This can damage the bicycle itself and potentially injure nearby pedestrians. Therefore, there is significant room for improvement in the proper positioning of the front wheel after a bicycle has stopped.

[0003] Patent application M360835 discloses a bicycle headset with a fixing function. When the user tightens the clamping turntable downwards, it pushes the first surrounding wall of the upper clamping member downwards to clamp the lower clamping member, preventing the upper clamping member from rotating relative to the lower clamping member. Furthermore, the locking member engages with the locking hole of the upper clamping member, thus preventing the locking member from rotating relative to the lower clamping member, and consequently preventing the fork from rotating left or right. This prior patent indicates that there are already technologies that integrate positioning mechanisms into the headset; however, this clamping fixing method is prone to wear on the upper and lower clamping members after prolonged use, resulting in a decrease in the fixing effect.

[0004] In addition, some bicycles have a headstock designed to be secured by a locking mechanism. This usually requires a lever exposed to the outside environment to activate the locking mechanism and fix the headstock at a specific angle. Although the user can easily operate the lever, it is also easy for other objects to touch the lever, causing the front wheel to be accidentally locked. There is still room for improvement in its use.

[0005] Therefore, the direction conceived by this utility model is to provide a handlebar cup that can fix the position of the front wheel of a bicycle. Utility Model Content

[0006] Given that the existing structures for fixing the position of the front wheel of a bicycle still have many defects, the main purpose of this utility model is to provide a bicycle handlebar positioning device, which is equipped with a horizontally movable push mechanism, so that the handlebars can be repeatedly pushed by the push mechanism for steering tests.

[0007] To achieve the aforementioned main objectives, the present invention provides a headstock positioning device comprising a positioning base, a clamping ring, a top cover, a rotating ring, a positioning pin, and an elastic element. The positioning base has at least one positioning hole. The clamping ring is connected to the positioning base via a bearing assembly, allowing the clamping ring to rotate relative to the positioning base. The clamping ring has a receiving groove that penetrates both the top and bottom surfaces of the clamping ring. The top cover is disposed on the top side of the clamping ring and has a first through hole, with an annular connection formed on the outer circumferential surface of the top cover. The rotating ring is rotatably fitted onto the annular connection of the top cover. A guide groove is recessed on the bottom side of the rotating ring, with one end of the guide groove being a large-diameter end and the other end being a small-diameter end, tapering from the large-diameter end to the small-diameter end, forming a sloping annular surface between the large-diameter end and the small-diameter end. A positioning pin passes through the receiving groove of the clamping ring, the first through hole of the upper cover, and the guide groove of the rotating ring. One end of the positioning pin abuts against the inclined ring surface of the rotating ring, and the other end faces the positioning base. The outer peripheral surface of the positioning pin protrudes to form a flange. An elastic element is disposed in the receiving groove of the clamping ring, and one end of the elastic element abuts against the flange of the positioning pin. When the rotating ring rotates relative to the upper cover, it can drive the positioning pin to move between an unlocked position and a locked position. When the positioning pin is in the unlocked position, the top end of the positioning pin is adjacent to the large-diameter end of the guide groove of the rotating ring, and the bottom end of the positioning pin is above the positioning hole of the positioning base. When the positioning pin is in the locked position, the top end of the positioning pin is adjacent to the small-diameter end of the guide groove of the rotating ring, and the flange compresses the elastic element, while the bottom end of the positioning pin passes into the positioning hole of the positioning base.

[0008] This invention relates to a headstock positioning device that is used in conjunction with the front fork seat tube of a bicycle. The front fork seat tube is simultaneously inserted into a positioning base, a clamping ring, a top cover, and a rotating ring. The top end of the front fork seat tube is connected to a vertical tube, and the other end is inserted into a head tube to connect to the front wheel. Through the technical features of this invention, when parking the bicycle, the user can first rotate the vertical tube and front fork seat tube using the handlebars, aligning the bottom end of the positioning pin with the positioning hole of the positioning base. Then, the user holds and rotates the rotating ring, causing the rotating ring to press down on the positioning pin through the inclined surface of the guide groove. This causes the positioning pin to enter the positioning hole, preventing the clamping ring and top cover from rotating, and consequently, preventing the front fork seat tube and vertical tube from rotating. This fixes the position of the front wheel, ensuring the bicycle will not tip over due to front wheel wobbling. The rotating ring is located on the outside of the entire headstock positioning device, allowing the user to directly operate it. Furthermore, the rotating ring does not have an outward protrusion structure, thus preventing accidental activation.

[0009] Preferably, a partition ring is provided between the positioning base and the top cover to cover the clamping ring. The partition ring has a top cover portion and a ring cover portion connected to the bottom edge of the top cover portion. A through hole is formed in the top cover portion, communicating with the first through hole of the top cover, and the positioning pin passes through the through hole. By covering the clamping ring with the partition ring, the headstock positioning device has a simple and clean appearance, while also preventing external objects from directly impacting the clamping ring and maintaining the clamping ring's fixing strength to the fork seat tube.

[0010] Preferably, the top surface of the top cover of the separator ring also protrudes to form at least one limiting protrusion, and the bottom side of the rotating ring is recessed to form at least one limiting groove. The limiting protrusion passes through at least one second through hole in the top cover into the limiting groove. In this way, the rotation range of the rotating ring is limited by the limiting groove and the limiting protrusion, so that the user can clearly know the limit position when operating the rotating ring and will not rotate it excessively.

[0011] Preferably, the receiving groove of the clamping ring includes an upper receiving portion and a lower receiving portion, the upper receiving portion being connected to the lower receiving portion, and the inner diameter of the upper receiving portion being larger than the inner diameter of the lower receiving portion. An elastic element is disposed in the upper receiving portion, and the end of the elastic element that does not abut against the flange of the positioning pin abuts against the bottom end of the upper receiving portion. In this way, when the positioning pin moves up and down, the elastic element compresses or rebounds using the bottom end of the upper receiving portion as a fulcrum, allowing the elastic element to assist in pushing the positioning pin back to its original position when the positioning pin moves from the locked position to the unlocked position.

[0012] Preferably, the top cover includes a first cover body and a second cover body. The second cover body also has a bottom ring portion, the top of which extends outward to form a ring-joint portion. The first cover body is assembled onto the top of the ring-joint portion of the second cover body. In this way, the top cover is assembled from two components, so that the rotating ring is not directly connected to the fork stem, allowing the rotating ring to rotate independently and only driving the locating pin to move up and down.

[0013] Preferably, the positioning pin further comprises an upper pin and a lower pin. The upper pin has a flange and its top end abuts against the inclined annular surface of the rotating ring. The lower pin has a recessed groove formed on its top surface, which connects to the bottom end of the upper pin. When the positioning pin is in the unlocked position, the bottom end of the upper pin is spaced a distance from the bottom end of the groove, while the bottom end of the lower pin faces the positioning base. Thus, the positioning pin can be designed as two components, using a two-stage action mechanism to secure the front wheel.

[0014] Preferably, the elastic element further includes an outer spring and an inner spring. The end of the outer spring that does not abut against the flange abuts against the clamping ring, while the end of the inner spring that does not abut against the flange abuts against the top edge of the lower pin. This divides the elastic element into two springs. When the locating pin moves from the unlocked position to the locked position, the upper pin compresses the inner spring before pushing the lower pin. If the locating pin is not aligned with the locating hole, the inner spring provides a buffering and pressure-accumulating function. When the locating pin is aligned with the locating hole, the inner spring releases its elastic force to push the lower pin into the locating hole.

[0015] The detailed structure, features, assembly, and usage of the bicycle headband positioning device provided by this utility model will be described in the subsequent detailed description of the embodiments. However, those skilled in the art should understand that these detailed descriptions and the specific embodiments listed for implementing this utility model are merely illustrative and not intended to limit the scope of protection of this utility model. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the application of the first embodiment of the present invention, showing its use in conjunction with a bicycle;

[0017] Figure 2 This is a perspective view of the first embodiment of the present utility model;

[0018] Figure 3 This is an exploded perspective view of the first embodiment of the present invention;

[0019] Figure 4 for Figure 3 Another perspective;

[0020] Figure 5 This is a perspective view of the rotating ring of this utility model;

[0021] Figure 6 This is a cross-sectional view of the first embodiment of the present invention, showing the positioning pin in the unlocked position;

[0022] Figure 7 This is a cross-sectional view of the first embodiment of the present invention, showing the positioning pin in the locked position;

[0023] Figure 8 This is an exploded perspective view of the second embodiment of the present invention;

[0024] Figure 9 This is a cross-sectional view of the second embodiment of the present invention, showing the positioning pin in the unlocked position;

[0025] Figure 10 This is a cross-sectional view of the second embodiment of the present invention, showing the locating pin in the locked position; and

[0026] Figure 11 This is a cross-sectional view of the second embodiment of the present invention, showing the elastic element in a pressurized state.

[0027] In the accompanying drawings, the meanings of the reference numerals are as follows:

[0028] 10. Headstock cup positioning device;

[0029] 20. Positioning base;

[0030] 21. Positioning holes;

[0031] 30. Tightening ring;

[0032] 31. Receiving groove;

[0033] 311. Upper receiving section;

[0034] 312. Lower receiving section;

[0035] 32. Grooving;

[0036] 33. Keyhole;

[0037] 34. Tighten the screws;

[0038] 35. Slots;

[0039] 40. Top cover;

[0040] 41. First cover body;

[0041] 42. Second cover;

[0042] 421. Bottom ring section;

[0043] 422. First perforation;

[0044] 423. Circumferential joint;

[0045] 424. Second perforation;

[0046] 50. Separator ring;

[0047] 51. Top cover;

[0048] 511. Through hole;

[0049] 512. Fixed column;

[0050] 513. Limiting protrusion;

[0051] 52. Ring cover part;

[0052] 60. Rotating ring;

[0053] 61. Guide groove;

[0054] 611. Large diameter end;

[0055] 612. Small diameter end;

[0056] 613. Inclined torus;

[0057] 62. Limiting groove;

[0058] 70. Locating pins;

[0059] 71. Flange portion;

[0060] 72. Pin fittings;

[0061] 73. Lower pin;

[0062] 731. Connecting groove;

[0063] 80. Elastic components;

[0064] 81. External spring;

[0065] 82. Inner spring;

[0066] 90. Bearings;

[0067] 91. Front fork riser;

[0068] 92. Head tube;

[0069] 93. Vertical pipe;

[0070] L1, Unlock location;

[0071] L2, Lock position. Detailed Implementation

[0072] The applicant first clarifies that in the embodiments and accompanying drawings described below, the same reference numerals denote the same or similar components or their structural features. It should be noted that the components and structures in the drawings are for illustrative purposes and are not drawn according to actual scale and quantity; and features of different embodiments can be used interchangeably where feasible in actual implementation. Secondly, when it is stated that a component is disposed on another component, it means that the aforementioned component is directly disposed on the other component, or the aforementioned component is indirectly disposed on the other component; that is, one or more other components are disposed between the two components. Conversely, when it is stated that a component is "directly" disposed on another component, it means that no other components are disposed between the two components.

[0073] Please refer to Figures 1 to 5The headset positioning device 10 provided by this utility model mainly includes a positioning base 20, a clamping ring 30, a top cover 40, a separating ring 50, a rotating ring 60, a positioning pin 70, and an elastic element 80. The headset fixing device is mainly used in conjunction with a bicycle. The bicycle's fork stem 91 passes through the positioning base 20, clamping ring 30, separating ring 50, top cover 40, and rotating ring 60 of the headset positioning device 10. Therefore, each of these components needs to have a hole in its middle position to accommodate the fork stem 91. The following is a structural description of the first embodiment.

[0074] The positioning base 20 is shaped like a bowl, with at least one positioning hole 21 at its bottom. In this embodiment, the positioning base 20 has three positioning holes 21, allowing the bicycle's front wheel to be positioned in three directions: forward, left, and right. The positioning base 20 connects to the bicycle's head tube 92, typically with the top of the head tube 92 fitting onto the outer circumference of the positioning base 20. A portion of the top of the positioning base 20 protrudes from the top of the head tube 92 and abuts against the edge of the top of the head tube 92. The positioning base 20 is primarily fixed to the head tube 92. Therefore, when the fork stem 91 rotates, only the clamping ring 30, the top cover 40, the separator ring 50, the positioning pin 70, and the elastic element 80 rotate relative to the head tube 92; the positioning base 20 does not rotate.

[0075] The clamping ring 30 has a receiving groove 31 that penetrates the top and bottom surfaces of the clamping ring 30. The receiving groove 31 can be divided into an upper receiving portion 311 and a lower receiving portion 312, which are connected. The inner diameter of the upper receiving portion 311 is larger than the inner diameter of the lower receiving portion 312. A slot 32 is also provided on one side of the clamping ring 30. The structures on both sides of the slot 32 are respectively provided with transverse locking holes 33. A clamping screw 34 is inserted into the two locking holes 33. As the clamping screw 34 is tightened, the structures on both sides of the slot 32 move closer together to tighten the bicycle's front fork stem 91.

[0076] Furthermore, the clamping ring 30 is mounted on the positioning base 20 via a bearing 90, so that the clamping ring 30 can be driven by the fork stem 91 and rotate relative to the positioning base 20 via the bearing 90.

[0077] The upper cover 40 is located above the clamping ring 30. The upper cover 40 includes a first cover body 41 and a second cover body 42. The inner circumferential surface of the first cover body 41 is formed with internal threads. The second cover body 42 has a bottom ring portion 421, which is an annular plate with a first through hole 422. The first through hole 422 penetrates the top and bottom surfaces of the bottom ring portion 421 and extends outward from the top of the bottom ring portion 421 to form a ring connection portion 423. An external thread is formed on the outer circumferential surface of the ring connection portion 423 near the top. The first cover body 41 is fitted and locked onto the ring connection portion 423 of the second cover body 42. The outer diameter of the bottom ring portion 421 of the first cover body 41 and the second cover body 42 is larger than the outer diameter of the ring connection portion 423. Therefore, the upper cover 40 has a shape that is wide at the top and bottom and concave in the middle. The bicycle's stem tube 93 is set above the first cover body 41 through the front fork stem tube 91.

[0078] A separating ring 50 is disposed between the clamping ring 30 and the upper cover 40. The separating ring 50 has a top cover portion 51 and an annular cover portion 52. The annular cover portion 52 is connected to the bottom edge of the top cover portion 51, and a through hole 511 is formed in the top cover portion 51. The through hole 511 communicates with the first through hole 422 of the upper cover 40. A protruding fixing post 512 is provided on the bottom surface of the top cover portion 51 of the separator ring 50. A slot 35 is formed on the top surface of the clamping ring 30 corresponding to the fixing post 512, so that the fixing post 512 of the separator ring 50 is inserted into the slot 35 of the clamping ring 30, thereby assembling the separator ring 50 to the clamping ring 30. The outer peripheral surface of the top cover portion 51 abuts against the bottom surface of the bottom ring portion 421 of the second cover body 42 of the upper cover 40. The inner peripheral surfaces of the top cover portion 51 and the ring cover portion 52 together form a receiving area, which can cover the upper part of the structure of the clamping ring 30, so that the clamping screw 34 is not exposed to the external environment, and avoids the situation where objects directly hit the clamping screw 34.

[0079] The rotating ring 60 is a hollow annular component with multiple grooves formed on its outer circumference to allow the user to better grip and operate it. The rotating ring 60 is fitted onto the annular joint 423 of the upper cover 40. A guide groove 61 is formed recessed on the bottom side of the rotating ring 60. The guide groove 61 forms an arc-shaped channel following the shape of the rotating ring 60. One end of the guide groove 61 is defined as a large diameter end 611, and the other end is defined as a small diameter end 612. The guide groove 61 has a tapering design from the large diameter end 611 to the small diameter end 612. Therefore, the surface connecting the large diameter end 611 and the small diameter end 612 is a sloping annular surface 613. The bottom side of the rotating ring 60 is recessed to form two limiting grooves 62, while the top surface of the top cover 51 of the partition ring 50 protrudes to form two limiting protrusions 513. The bottom ring 421 of the second cover 42 of the upper cover 40 forms two second through holes 424 corresponding to the positions of these limiting protrusions 513. The limiting protrusions 513 of the partition ring 50 pass through the second through holes 424 of the upper cover 40 and reach the two limiting grooves 62 of the rotating ring 60. In this way, when the rotating ring 60 rotates relative to the upper cover 40, its maximum range of rotation will be limited by the limiting grooves 62 and the limiting protrusions 513.

[0080] The positioning pin 70 passes through the receiving groove 31 of the clamping ring 30, the first through hole 422 of the upper cover 40, the through hole 511 of the separating ring 50, and the guide groove 61 of the rotating ring 60. The outer peripheral surface of the positioning pin 70 protrudes to form a flange portion 71, which is located in the upper receiving portion 311 of the receiving groove 31 of the clamping ring 30. One end of the flange portion 71 above the top side abuts against the inclined ring surface 613 of the rotating ring 60, while the other end is set towards the positioning base 20.

[0081] The elastic element 80 may be, for example, a spring, which is disposed in the upper receiving portion 311 of the receiving groove 31 of the clamping ring 30. One end of the elastic element 80 abuts against the bottom end of the flange portion 71 of the locating pin 70, and the other end abuts against the bottom end of the upper receiving portion 311.

[0082] Please continue to refer to this. Figure 6 and Figure 7 In normal riding conditions, the front wheel of the bicycle must be able to swing left and right so that the user can steer the front wheel by operating the handlebars. Therefore, in this state, the positioning pin 70 is in an unlocked position L1.

[0083] The top end of the positioning pin 70 is adjacent to the large-diameter end 611 of the guide groove 61 of the rotating ring 60, and the bottom end of the positioning pin 70 is located above the positioning base 20. Since the front wheel is freely steerable in this state, the positioning pin 70 may not necessarily align with any of the positioning holes 21 of the positioning base 20. Even if the bottom end of the positioning pin 70 happens to align with any of the positioning holes 21 during steering, the positioning pin 70 will not penetrate into the positioning hole 21 if the user does not operate the rotating ring 60, thus keeping the positioning pin 70 in the unlocked position L1. Figure 6 As shown.

[0084] When a user temporarily parks the bicycle on the roadside, they can first turn the handlebars, for example, so that the vertical tube 93 is perpendicular to the head tube 92 at a 90-degree angle. This angle is determined by the positioning holes 21 of the positioning base 20. The main purpose is to align the positioning pin 70 with one of the positioning holes 21, thus fixing the front wheel in a specific direction. Therefore, this invention does not specifically limit the number of positioning holes 21 or the spacing between them; it only needs to fix the front wheel in a specific direction through the configuration of the positioning pin 70 and the positioning holes 21. Next, the user operates the rotating ring 60, causing the rotating ring 60 to rotate relative to the ring joint 423 of the upper cover 40, thereby moving the positioning pin 70 from the unlocked position L1 to the locked position L2.

[0085] As the rotating ring 60 rotates, the position where the inclined ring surface 613 of the rotating ring 60 abuts against the positioning pin 70 gradually moves from the position near the large diameter end 611 to the position near the small diameter end 612. For the positioning pin 70, the space in the guide groove 61 becomes smaller and smaller, which means that the positioning pin 70 is forced to move downward along the receiving groove 31 of the clamping ring 30. At the same time, the elastic member 80 is compressed by the flange portion 71 of the positioning pin 70, and the bottom end of the positioning pin 70 passes through the lower receiving portion 312 into the positioning hole 21 of the positioning base 20, so that the positioning pin 70 is fixed on the positioning base 20, that is, it reaches the locking position L2. Since the positioning pin 70 passes through the clamping ring 30, the top cover 40, and the partition ring 50, the clamping ring 30, the top cover 40, and the partition ring 50 are fixed to the positioning base 20 by the positioning pin 70. As a result, the fork stem 91 passing through the clamping ring 30, the top cover 40, and the partition ring 50 cannot rotate relative to the head tube 92. The front wheel connected to the fork stem 91 is fixed in a specific direction. At this time, the front wheel is in a state where it cannot be turned, which effectively prevents the bicycle from tipping over due to the front wheel wobbling.

[0086] Furthermore, when the user starts riding the bicycle, they rotate the rotating ring 60 in the opposite direction. The position where the inclined ring surface 613 of the rotating ring 60 abuts against the positioning pin 70 gradually moves from the position near the small diameter end 612 to the position near the large diameter end 611. As the rotating ring 60 moves, the elastic member 80 gradually rebounds and pushes the flange portion 71 of the positioning pin 70 upward. The bottom end of the positioning pin 70 then leaves the positioning hole 21 of the positioning base 20, and the positioning pin 70 returns to the unlocked position L1.

[0087] Furthermore, please refer to Figure 8 The present invention further provides a second embodiment, which differs from the first embodiment only in the structure of the positioning pin 70 and the elastic member 80.

[0088] The positioning pin 70 in the second embodiment includes an upper pin 72 and a lower pin 73. A flange 71 is formed on the outer peripheral surface of the upper pin 72, and the top end of the upper pin 72 abuts against the inclined annular surface 613 of the rotating ring 60. The lower pin 73 is located below the upper pin 72, and the bottom end of the lower pin 73 faces the positioning base 20. The top surface of the lower pin 73 is recessed to form a connecting groove 731, through which the bottom end of the upper pin 72 is fitted. The top end of the lower pin 73 is spaced apart from the bottom surface of the flange 71 of the upper pin 72, and the upper pin 72 can move up and down in the connecting groove 731. When the positioning pin 70 is in the unlocked position L1, the bottom end of the upper pin 72 is spaced apart from the bottom end of the connecting groove 731, indicating that the bottom end of the upper pin 72 does not directly contact the bottom end of the connecting groove 731.

[0089] The elastic member 80 of the second embodiment includes an outer spring 81 and an inner spring 82. The outer spring 81 is disposed in the upper receiving portion 311 of the receiving groove 31 of the clamping ring 30, with one end abutting against the bottom end of the flange portion 71 and the other end abutting against the bottom end of the upper receiving portion 311. The inner spring 82 is disposed between the top end of the lower pin 73 and the bottom end of the flange portion 71 of the upper pin 72, with one end abutting against the bottom end of the flange portion 71 and the other end abutting against the top end of the lower pin 73.

[0090] Please continue to refer to Figures 9 to 11 When the bicycle is rideable, the positioning pin 70 is in an unlocked position L1. The top of the upper pin 72 is adjacent to the large-diameter end 611 of the guide groove 61 of the rotating ring 60, and the bottom end of the lower pin 73 is located above the positioning base 20, as shown. Figure 9 As shown.

[0091] When the user wants to fix the front wheel in a specific direction, the user first operates the rotating ring 60 to rotate the rotating ring 60 relative to the ring joint 423 of the upper cover 40, so as to drive the positioning pin 70 from the unlocked position L1 to the locked position L2.

[0092] As the rotating ring 60 rotates, the position where the inclined annular surface 613 of the rotating ring 60 abuts against the upper pin 72 gradually moves from the position near the large diameter end 611 to the position near the small diameter end 612. For the upper pin 72, the space within the guide groove 61 becomes smaller and smaller, meaning that the upper pin 72 is forced to move downward along the receiving groove 31 of the clamping ring 30. The bottom end of the upper pin 72 will displace downward relative to the engaging groove 731 of the lower pin 73, and the flange portion 71 will press down on the inner spring 82 and the outer spring 81. The inner spring 82 is compressed with the top end of the lower pin 73 as the fulcrum, and the outer spring 81 is compressed with the bottom end of the upper receiving portion 311 of the receiving groove 31 as the fulcrum. When compressed, the lower pin 73 will not move at this time. However, as the bottom end of the upper pin 72 gradually approaches the bottom end of the engagement groove 731 of the lower pin 73, the inner spring 82 will gradually become unable to be compressed further. The lower pin 73 will then be driven to move downward along the lower receiving portion 312 of the receiving groove 31 of the clamping ring 30. This will cause the bottom end of the lower pin 73 to pass through the positioning hole 21 of the positioning base 20, thus fixing the lower pin 73 to the positioning base 20. The positioning pin 70 will then reach the locking position L2, and the front wheel of the bicycle will become unable to turn, effectively preventing the bicycle from tipping over due to the swaying of the front wheel.

[0093] When the user starts riding the bicycle, he rotates the rotating ring 60 in the opposite direction. The position where the inclined ring surface 613 of the rotating ring 60 abuts against the upper pin 72 gradually moves from the position near the small diameter end 612 to the position of the large diameter end 611. As the rotating ring 60 moves, the outer spring 81 and the inner spring 82 will gradually rebound and push the flange 71 of the upper pin 72 upward. The bottom end of the lower pin 73 will then leave the positioning hole 21 of the positioning base 20, and the positioning pin 70 will return to the unlocked position L1.

[0094] The second embodiment provides a two-stage travel through the cooperation of the positioning pin 70 and the elastic element 80. If the user turns the handlebars to a specific direction and the positioning pin 70 is not precisely aligned with any of the positioning holes 21 of the positioning base 20, the lower pin 73 cannot smoothly pass into the positioning hole 21 during the process of the rotating ring 60 pressing down on the positioning pin 70. Since the rotating ring 60 has already rotated to its limit position, the inner spring 82 will remain in a state of maximum compression, which can be called a accumulating state. Figure 11 As shown, as long as the user turns the handlebar slightly, once the lower pin 73 is aligned with the positioning hole 21, the inner spring 82 will release some elastic force to drive the lower pin 73 to move downwards and insert it into the positioning hole 21.

[0095] In summary, the bicycle headstock positioning device 10 provided by this utility model has at least the following advantages compared with the prior art:

[0096] 1. The headstock positioning device 10 of this utility model uses the rotating ring 60 to drive the positioning pin 70 to fix the position of the clamping ring 30 and the upper cover 40, thereby preventing the front fork stem 91 from rotating, so as to position the front wheel in a specific direction, which can prevent the front wheel from swaying left and right when parking the bicycle and ensure that the bicycle is parked stably.

[0097] 2. The head cup positioning device 10 of this utility model provides a rotating component for user operation, thus eliminating the outward protrusion of the operating structure and significantly reducing the risk of accidental contact by external objects, providing a safer structure.

[0098] Finally, it must be stated again that the constituent components disclosed in the above embodiments of this utility model are merely illustrative examples and are not intended to limit the scope of this utility model. Substitutions or variations of other equivalent components should also be within the protection scope of this utility model.

Claims

1. A headband positioning device for a bicycle, characterized in that, Includes: A positioning base having at least one positioning hole; A clamping ring is connected to the positioning base via a bearing assembly, allowing the clamping ring to rotate relative to the positioning base. The clamping ring has a receiving groove that penetrates the top and bottom surfaces of the clamping ring. A top cover is disposed on the top side of the clamping ring. The top cover has a first through hole and a ring joint is formed on the outer peripheral surface of the top cover. A rotating ring is rotatably fitted onto the ring joint of the upper cover. A guide groove is formed in the indentation of the bottom side of the rotating ring. One end of the guide groove is a large diameter end and the other end is a small diameter end. It gradually tapers from the large diameter end to the small diameter end, and an inclined ring surface is formed between the large diameter end and the small diameter end. A positioning pin is inserted into the receiving groove of the clamping ring, the first through hole of the upper cover, and the guide groove of the rotating ring. One end of the positioning pin abuts against the inclined ring surface of the rotating ring, and the other end faces the positioning base. The outer peripheral surface of the positioning pin protrudes to form a flange. An elastic element is disposed in the receiving groove of the clamping ring, and one end of the elastic element abuts against the flange of the positioning pin. When the rotating ring rotates relative to the top cover, it can drive the positioning pin to move between an unlocked position and a locked position. When the positioning pin is in the unlocked position, the top end of the positioning pin is adjacent to the large diameter end of the guide groove of the rotating ring, and the bottom end of the positioning pin is above the positioning hole of the positioning base. When the positioning pin is in the locked position, the top end of the positioning pin is adjacent to the small diameter end of the guide groove of the rotating ring, and the flange compresses the elastic member, while the bottom end of the positioning pin passes into the positioning hole of the positioning base.

2. The bicycle headstock positioning device according to claim 1, characterized in that, A partition ring is provided between the positioning base and the top cover to cover the clamping ring. The partition ring has a top cover portion and a ring cover portion connected to the bottom edge of the top cover portion. A through hole is formed in the top cover portion to communicate with the first through hole of the top cover. The positioning pin is inserted through the through hole.

3. The bicycle headstock positioning device according to claim 2, characterized in that, The top surface of the top cover of the partition ring also protrudes to form at least one limiting protrusion, and the bottom side of the rotating ring is recessed to form at least one limiting groove. The limiting protrusion passes through at least one second through hole of the top cover into the limiting groove.

4. The bicycle headstock positioning device according to claim 1, characterized in that, The receiving groove of the clamping ring includes an upper receiving portion and a lower receiving portion. The upper receiving portion is connected to the lower receiving portion, and the inner diameter of the upper receiving portion is larger than the inner diameter of the lower receiving portion. The elastic member is disposed in the upper receiving portion, and one end of the elastic member that does not abut against the flange of the positioning pin abuts against the bottom end of the upper receiving portion.

5. The bicycle headstock positioning device according to claim 1, characterized in that, The cover includes a first cover body and a second cover body. The second cover body also has a bottom ring portion. The top of the bottom ring portion extends outward to form the ring joint portion. The first cover body is assembled to the top of the ring joint portion of the second cover body.

6. The bicycle headstock positioning device according to claim 1, characterized in that, The positioning pin also includes an upper pin and a lower pin. The upper pin has a flange and its top end abuts against the inclined ring surface of the rotating ring. The lower pin is recessed from its top surface to form a connecting groove, through which the bottom end of the upper pin is connected. When the positioning pin is in the unlocked position, the bottom end of the upper pin is spaced a distance from the bottom end of the connecting groove, while the bottom end of the lower pin faces the positioning base.

7. The bicycle headstock positioning device according to claim 6, characterized in that, The elastic element also includes an outer spring and an inner spring. The end of the outer spring that does not abut against the flange abuts against the clamping ring, while the end of the inner spring that does not abut against the flange abuts against the top edge of the lower pin.

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