A scooter

Abstract

The present invention discloses a scooter, comprising a handlebar riser assembly, a frame assembly and front and rear wheels, wherein the handlebar riser assembly is mounted on the frame assembly and can move between an unfolded position and a folded position, and further comprises a locking device; the handlebar riser assembly comprises a steering riser and a positioning column; the frame assembly comprises a connecting portion and a pedal platform, a mounting cavity is arranged in the connecting portion, and a positioning groove matching the positioning column is arranged at the bottom of the mounting cavity; the locking device comprises a button hinged to the steering riser and a positioning member arranged inside the positioning column; the bottom of the button can be clamped to the positioning member when no force is applied, and a retractable blocking member is arranged in the positioning member, and when the blocking member is extended, it is used to limit the positioning member from moving upward relative to the mounting cavity; when the positioning column is separated from the positioning groove, the steering riser can rotate relative to the mounting cavity. It can simplify the installation steps of the handlebar riser, prevent the steering riser from falling out during the rotation process, and is beneficial to improving the user's operating experience, and can also improve the stability of the vehicle body.

Description

Technical Field

[0001] The present invention relates to the technical field of scooters, in particular to a scooter. Background Art

[0002] Scooters are a popular children's toy. Children riding scooters can improve their body flexibility, reaction speed, exercise volume, and body resistance. It is a fashionable sports and leisure tool that is loved by many children. Three-wheeled scooters are a common type of scooter. When children use it, they step one foot on the front of the scooter and the other foot on the ground to slide forward. Just twist the steering wheel of the handlebar stem left and right to easily change the sliding direction.

[0003] With the continuous improvement of the quality of life, children's scooters have very high technical requirements in appearance and performance quality. In order to achieve the purpose of convenient carrying, the handlebar risers of scooters on the market currently have two positions: vertical and laid down. The design of the bottom of the handlebar riser is to insert a 45° angled cylinder into the corresponding positioning hole at the bottom of the vehicle, and position it with two raised square bones at the bottom of the vehicle to prevent shaking in the left and right directions, and then clamp the bottom of the vehicle with the buckle at the bottom of the button to prevent the handlebar riser from falling out of the positioning hole at the bottom of the vehicle. When you need to carry it, press the button, pull out the handlebar riser, rotate it 180°, and then push the handlebar riser to the bottom of the positioning hole at the bottom of the vehicle, release the button, and fix the handlebar riser above the bottom plate to reach the laid down position.

[0004] However, the existing scooter has the following defects:

[0005] (1) To insert the handlebar riser into the bottom of the car, you need to first align it with the two notches on the bottom of the car, and then rotate it to the correct angle after insertion before you can push the handlebar riser to the bottom of the car. The operation process is relatively complicated and it is not easy to align the handlebar riser;

[0006] (2) During the rotation process, when the two limit bone positions are aligned with the two gaps at the bottom of the vehicle, the handlebar stem can be easily pulled out;

[0007] (3) In addition, when turning, the handlebar stem is prevented from swinging left and right mainly by two small protruding bones in the groove of the bottom of the vehicle, which lacks strength and affects the stability of the vehicle body;

[0008] (4) In addition, during the rotation of the handlebar stem (except in the vertical and lying positions), the handlebar stem and the base plate are completely connected by two thin bones, which makes the structure more susceptible to damage.

[0009] Therefore, how to improve the installation convenience and operating experience of the handlebar riser and improve the stability of the vehicle body is an important technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0010] The purpose of the present invention is to provide a scooter, which can simplify the installation steps of the handlebar stem, prevent the steering stem from falling out during the rotation process, which is beneficial to improving the user's operating experience and can also improve the stability of the vehicle body.

[0011] In order to achieve the above-mentioned object, the present invention provides a scooter, comprising: a handlebar stem tube assembly, a frame assembly, and a front wheel and a rear wheel mounted on the frame assembly, wherein the handlebar stem tube assembly is mounted on the frame assembly and can move between an unfolded position and a folded position, and further comprises a locking device capable of locking the handlebar stem tube assembly in the unfolded position and the folded position; the handlebar stem tube assembly comprises a steering stem tube and a positioning column arranged at the bottom of the steering stem tube; the frame assembly comprises an upwardly protruding connecting portion and a pedal platform connected to the connecting portion, wherein the connecting portion is provided with an installation cavity for installing the bottom of the steering stem tube, and the bottom of the installation cavity is provided with a positioning groove matched with the positioning column;

[0012] The locking device comprises a button hinged to the steering riser and a positioning piece arranged inside the positioning column; the bottom of the button can be snapped to the top of the positioning piece when not subject to external force, a retractable blocking piece is arranged inside the positioning piece, and when the blocking piece is extended, it can be used to limit the upward movement of the positioning piece relative to the installation cavity; when the positioning column is separated from the positioning groove, the steering riser can rotate relative to the installation cavity.

[0013] As a preferred solution, the top of the installation cavity is connected with an annular sheet;

[0014] The outer end of the blocking member is a spherical structure; when the blocking member is extended, the distance between the outer end and the axis of the positioning member is greater than the radius of the annular sheet.

[0015] As a preferred solution, at least one group of blocking members is provided in the positioning member, and two blocking members in one group are relatively arranged in the positioning member; the inner edge of the top of the annular sheet is provided with a guiding slope for the outer end of the blocking member to slide.

[0016] As a preferred solution, the bottom of the steering riser is connected to a split ground sleeve, and the positioning column is formed at the bottom of the sleeve;

[0017] A first elastic member is connected between the bottom of the positioning member and the positioning column.

[0018] As a preferred solution, a cylindrical portion is further provided between the main body of the sleeve and the positioning column, and the installation cavity has an annular cavity for the cylindrical portion to rotate;

[0019] The first elastic member is a spring, and a sleeve column for sleeve-engaging the first end of the first elastic member is provided at the bottom of the positioning member, and the second end of the first elastic member abuts against the inner surface of the positioning column.

[0020] As a preferred solution, a rotating boss is provided on the top of the annular cavity, and a rotating space is formed between the rotating boss and the annular sheet for the outer end of the blocking member to rotate.

[0021] As a preferred solution, the positioning member is installed in the cylindrical part, and a strip groove is provided on the cylindrical part along its length direction, and the outer end of the blocking member can extend from the strip groove.

[0022] As a preferred solution, a first hook portion is provided at the bottom of the button, and a second hook portion that can be engaged with the first hook portion is provided at the top of the positioning member; a second elastic member is connected between the first hook portion and the tube sleeve; and both the first hook portion and the second hook portion are provided with inclined surfaces.

[0023] As a preferred solution, a clearance groove is provided on the connecting portion, and when the positioning column is installed in the positioning groove, the clearance groove is arranged opposite to the blocking member.

[0024] As a preferred solution, the positioning column is a square structure, and the positioning groove is also a square groove; the angle formed between the axis of the installation cavity and the plane where the extension direction of the pedal platform is located is 45°.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] The scooter of the present invention comprises a handlebar stem assembly, a frame assembly, a front wheel and a rear wheel. The handlebar stem assembly is mounted on the frame assembly and can move between an unfolded position and a folded position. The handlebar stem assembly is locked in the unfolded position and the folded position by a locking device. The handlebar stem assembly comprises a steering stem and a positioning column arranged at the bottom of the steering stem. The frame assembly comprises an upwardly protruding connecting portion and a pedal platform connected to the connecting portion. The connecting portion is provided with an installation cavity for installing the bottom of the steering stem. The bottom of the installation cavity is provided with a positioning groove matched with the positioning column. The locking device specifically comprises a button hinged to the steering stem and a positioning member arranged inside the positioning column. The bottom of the button can be clamped to the top of the positioning member when not subjected to external force. The positioning member is provided with a retractable The blocking member is retracted when the handlebar riser assembly is installed in the installation cavity, so that the positioning member can smoothly enter the installation cavity, and then the positioning column at the bottom of the steering riser is installed into the positioning groove at the bottom of the installation cavity. After that, the blocking member is in an extended state when there is no external force, and can be used to limit the positioning member from moving upward relative to the installation cavity. In this way, the installation of the handlebar riser assembly and the frame assembly is achieved through the cooperation of the positioning column and the positioning groove, the button is engaged with the positioning member when no external force is applied, and the blocking member limits the positioning member, so that the handlebar riser assembly is locked in the expanded position. The installation steps are simple and efficient, and precise alignment is not required. In addition, the cooperation of the overall structure of the positioning column and the positioning groove can effectively prevent shaking during steering and possible functional problems during use;

[0027] When the user needs to fold the scooter, the user presses the button to disengage the positioning member from the button. At this time, the steering stem is pulled up along the length direction of the installation cavity. Due to the limitation of the positioning member by the blocking member, the bottom of the steering stem moves upward relative to the positioning member, so that the positioning column is disengaged from the positioning groove. At this time, the steering stem can be rotated in the installation cavity to rotate the handlebar stem assembly to the folded position. During the rotation of the steering stem, the positioning member can be limited by the blocking member to prevent the steering stem from falling out, which is beneficial to improving the user's operating experience. After that, the steering stem is moved toward the positioning groove, so that the positioning column is inserted into the positioning groove again, and the button is driven to move downward, so that the button and the positioning member are engaged again, so as to achieve locking in the folded position. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is an exploded schematic diagram of a scooter provided by an embodiment of the present invention;

[0029] Figure 2 is a schematic diagram of the three-dimensional structure of a handlebar riser assembly provided by an embodiment of the present invention;

[0030] Figure 3 is a schematic diagram of the three-dimensional structure of a frame assembly provided by an embodiment of the present invention;

[0031] Figure 4 is a cross-sectional view of the handlebar riser assembly of the present invention when it is not connected to the frame assembly;

[0032] Figure 5 yes Figure 4 Side view of

[0033] Figure 6 is a cross-sectional view of the handlebar riser assembly of the present invention when it is in an extended position and locked;

[0034] Figure 7 yes Figure 6 Side view of

[0035] Figure 8 This is a cross-sectional view of the steering riser when it is pulled up from the unfolded position;

[0036] Fig. 9 yes Figure 8 Side view of

[0037] Fig.10 This is a side view after the steering riser is rotated 180°;

[0038] Fig.11 is a side view of the handlebar stem assembly in the folded and locked position.

[0039] Among them, 10, handlebar stem assembly; 11, steering stem; 12, sleeve; 121, positioning column; 122, cylindrical part; 1221, strip groove; 20, frame assembly; 21, connecting part; 211, mounting cavity; 2111, annular cavity; 2112, rotating boss; 212, positioning groove; 213, air avoidance groove; 22, foot platform; 31, button; 311, first hook part; 312, pin shaft; 32, positioning member; 322, second hook part; 33, first elastic member; 34, blocking member; 35, annular sheet; 351, guide slope; 36, second elastic member; 37, V-shaped spring; 40, front wheel; 50, rear wheel. DETAILED DESCRIPTION

[0040] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0042] See also Figure 1 The exploded view shown schematically shows the scooter of the present invention, including a handlebar stem assembly 10, a frame assembly 20, and a front wheel 40 and a rear wheel 50 mounted on the frame assembly 20. The handlebar stem assembly 10 is mounted on the frame assembly 20 and can move between an unfolded position and a folded position. The handlebar stem assembly 10 is in a use state when in the unfolded position, and is in a folded state when adjusted to the folded position. The scooter also includes a locking device that can lock the handlebar stem assembly 10 in the unfolded position and the folded position. Figure 2 As shown, the handlebar stem assembly 10 includes a steering stem 11 and a positioning column 121 disposed at the bottom of the steering stem 11; Figure 3 As shown, the frame assembly 20 includes a connecting portion 21 and a pedal platform 22 connected to the connecting portion 21. The connecting portion 21 is protruding upward, and a mounting cavity 211 is provided in the connecting portion 21. The steering stem 11 is connected to the mounting cavity 211 for mounting the steering stem 11. A positioning groove 212 matching the positioning column 121 is provided at the bottom of the mounting cavity 211. The locking device includes a button 31 hinged to the steering stem 11 and a positioning member 32 provided inside the positioning column 121. Importantly, the button 31 is When the bottom of the steering riser 11 is not subjected to external force, it can be clamped on the top of the positioning member 32. A retractable blocking member 34 is provided in the positioning member 32. When the blocking member 34 is retracted, it is convenient for the bottom of the steering riser 11 to smoothly enter the installation cavity 211, so that the positioning column 121 is inserted into the positioning groove 212 to achieve compression; when the blocking member 34 is extended, it can be used to limit the positioning member 32 from moving upward relative to the installation cavity 211; and when the positioning column 121 is separated from the positioning groove 212, the steering riser 11 can rotate relative to the installation cavity 211.

[0043] The scooter based on the above technical features, see Figures 4 to 7As shown, a retractable blocking member 34 is provided in the positioning member 32. When the handlebar stem assembly 10 is installed in the installation cavity 211, the blocking member 34 is retracted to allow the positioning member 32 to smoothly enter the installation cavity 211. Then, the positioning column 121 at the bottom of the steering stem 11 is installed into the positioning groove 212 at the bottom of the installation cavity 211. After that, the blocking member 34 is in an extended state when there is no external force, which can be used to limit the positioning member 32 from moving upward relative to the installation cavity 211. In this way, the positioning column 121 and the positioning groove 212 are connected to each other. The cooperation of the positioning groove 212, the engagement of the button 31 with the positioning member 32 when no external force is applied, and the limiting of the positioning member 32 by the blocking member 34 can realize the installation of the handlebar stem assembly 10 and the frame assembly 20, so that the handlebar stem assembly 10 is locked in the unfolded position. The installation steps are simple and efficient, and no precise alignment is required. In addition, the cooperation of the overall structure of the positioning column 121 and the positioning groove 212 can effectively prevent shaking during steering and possible functional problems during use. When the user needs to fold the scooter, please refer to Figure 8 and Fig. 9 As shown, the user presses the button 31 to disengage the positioning member 32 from the button 31, and at this time, the steering stem 11 is pulled up along the length direction of the installation cavity 211. Due to the limitation of the positioning member 32 by the blocking member 34, the bottom of the steering stem 11 moves upward relative to the positioning member 32, so that the positioning column 121 is disengaged from the positioning groove 212. At this time, the steering stem 11 can be rotated in the installation cavity 211 to rotate the handlebar stem assembly 10 to the folded position. During the rotation of the steering stem 11, the blocking member 34 can prevent the steering stem 11 from falling out, which is beneficial to improving the user's operating experience. Afterwards, please refer to Fig.10 and Fig.11 As shown, the steering standpipe 11 is moved toward the positioning groove 212 so that the positioning column 121 is inserted into the positioning groove 212 again, and the button 31 is driven to move downward, so that the button 31 is engaged with the positioning member 32 again, thereby achieving locking in the folded position.

[0044] In this embodiment, the angle formed between the axis of the installation cavity 211 and the plane where the footrest platform 22 extends is 45°. The handlebar stem assembly 10 rotates 180° from the unfolded position to the folded position. Fig.10 and Fig.11 As shown in FIG. 1 , the steering stand tube 11 is extended along the footrest platform 22. Preferably, as Figure 2 and Figure 3 As shown, the positioning column 121 is a square structure, and the positioning groove 212 is also a square groove. In this way, through the coordination of this overall structure, shaking during steering and possible functional problems during use can be effectively prevented, the stability of the vehicle body during use can be improved, and precise alignment is not required, which is convenient for installation.

[0045] Specifically, see Figure 6 As shown, Figure 6 The figure is a cross-sectional view of the handlebar stem assembly in the unfolded position and locked. The top of the installation cavity 211 is connected with an annular sheet 35; the outer end of the blocking member 34 is a spherical structure; when the blocking member 34 is extended, the distance between the outer end of the blocking member 34 and the axis of the positioning member 32 is greater than the radius of the annular sheet 35. In this way, when the handlebar stem assembly 10 is inserted into the installation cavity 211, the outer end of the blocking member 34 contacts the inner edge of the annular sheet 35, so that the blocking member 34 contracts, so that the positioning column 121 is inserted into the positioning groove 212. After the blocking member 34 loses the external force, it returns to the position and extends out. Since the annular sheet 35 is installed on the installation cavity 211, the lower surface of the annular sheet 35 forms a block to the blocking member 34 to prevent the positioning member 32 from moving upward. At this time, the bottom of the button 31 is engaged with the top of the positioning member 32, so that the position between the steering stem 11 and the positioning member 32 is relatively fixed, thereby realizing the locking of the handlebar stem assembly 10 in the unfolded position. Preferably, the annular sheet 35 may be made of a metal sheet to improve the force bearing performance.

[0046] Preferably, at least one group of blocking members 34 is disposed in the positioning member 32, and two blocking members 34 in one group are disposed relatively to each other in the positioning member 32. Figure 4 and Figure 6 As shown, the blocking member 34 is made of glass beads, and a cylindrical hole is provided in the positioning member 32. The glass beads are installed in the cylindrical hole. The two opposite glass beads can be compressed by a V-shaped spring 37 to achieve a retractable function. Of course, the two glass beads can also be connected by other structures such as tension springs, elastomers, etc., as long as the functions of the present invention can be achieved, which will not be repeated here.

[0047] More preferably, see Figure 4 As shown, the inner edge of the top of the annular sheet 35 is provided with a guiding slope 351 for the outer end of the blocking member 34 to slide. When the handlebar riser assembly 10 is inserted into the installation cavity 211, the glass ball contacts the inner edge of the annular sheet 35 and is guided by the transition of the guiding slope 351 so that the glass ball compresses the V-shaped spring 37, thereby realizing the contraction between the two glass balls relative to each other, so that the glass balls pass through the annular sheet 35 smoothly, thereby improving the smoothness of the installation and preventing jamming.

[0048] As a preferred embodiment, see Figure 1 and Figure 3As shown, in order to facilitate production and ensure performance, the bottom of the steering standpipe 11 is connected with a pipe sleeve 12 of a split structure, and the positioning column 121 is formed at the bottom of the pipe sleeve 12. In this way, the steering standpipe 11 can be made of steel, and the pipe sleeve 12 can be made of plastic. The pipe sleeve 12 is installed at the bottom of the steering standpipe 11. Furthermore, the positioning column 121 and the pipe sleeve 12 are an integrally formed structure, so that the production cost can be reduced while ensuring the performance of the vehicle body.

[0049] Based on the above structure, see Figures 6 to 9 As shown, a first elastic member 33 is connected between the bottom of the positioning member 32 and the positioning column 121. In this way, when the user needs to fold the scooter, the button 31 is disengaged from the positioning member 32, and the steering stem 11 is pulled up. The steering stem 11 moves upward relative to the positioning member 32, so that the positioning column 121 is disengaged from the positioning groove 212, and the first elastic member 33 is compressed at the same time. Then, the steering stem 11 is rotated 180° to reach the folding position, and the positioning column 121 is aligned with the positioning groove 212. At this time, the user releases his hand, and under the action of the first elastic member 33, the steering stem 11 is automatically pressed into the positioning groove 212, thereby improving the convenience of operation when folding.

[0050] More preferably, see Figure 1 , Figure 2 , Figure 3 As shown, a cylindrical portion 122 is further provided between the main body of the sleeve 12 and the positioning column 121 , and the installation cavity 211 has an annular cavity 2111 for the cylindrical portion 122 to rotate, so as to facilitate the rotation of the steering standpipe 11 .

[0051] In this embodiment, the first elastic member 33 is a spring, and a sleeve column for sleeve-engaging the first end of the first elastic member 33 is provided at the bottom of the positioning member 32 , and the second end of the first elastic member 33 abuts against the inner surface of the positioning column 121 .

[0052] More specifically, see Figure 2 and Figure 4 As shown, a rotating boss 2112 is provided on the top of the annular cavity 2111, and a rotating space for the outer end of the blocking member 34 to rotate is formed between the rotating boss 2112 and the annular sheet 35, providing support for the blocking member 34, and the structure is reliable. Therefore, the steering riser 11 can be prevented from having a weak position during the rotation process, thereby improving the service life of the structure.

[0053] Further, see Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 8As shown, the positioning member 32 is installed in the cylindrical part 122. The cylindrical part 122 is provided with a strip groove 1221 along its length direction. The outer end of the blocking member 34 can extend from the strip groove 1221. When the steering riser 11 is pulled up, the steering riser 11 can move upward relative to the positioning member 32, so that the positioning column 121 can be smoothly disengaged from the positioning groove 212, preparing for rotating the steering riser 11.

[0054] like Figure 5 In a specific embodiment, the bottom of the button 31 is provided with a first hook portion 311, and the top of the positioning member 32 is provided with a second hook portion 322 that can be engaged with the first hook portion 311. The button 31 can be hinged to the steering standpipe 11 through a pin 312. A second elastic member 36 is connected between the first hook portion 311 and the sleeve 12, so that after the hand is released from the button 31, the button 31 can automatically reset, so that the first hook portion 311 is reset to a position that can be engaged with the second hook portion 322. To facilitate the smooth engagement of the first hook portion 311 and the second hook portion 322 after the hand is released, the first hook portion 311 and the second hook portion 322 are both provided with inclined surfaces for guidance.

[0055] Further preferably, in order to remove the installed handlebar stem assembly 10 from the frame assembly 20, an air avoidance groove 213 is provided on the connecting portion 21. When the positioning column 121 is installed in the positioning groove 212, the air avoidance groove 213 is arranged opposite to the blocking member 34. In this way, when disassembly is required, it is only necessary to push the glass ball inward through the air avoidance groove 213 from the outside to achieve inward contraction of the glass ball, thereby releasing the limiting effect on the positioning member 32, thereby achieving smooth separation of the steering stem 11 from the installation cavity 211, and completing the disassembly of the handlebar stem assembly 10.

[0056] In summary, in the scooter of the present invention, a retractable blocking member 34 is provided in the positioning member 32 to limit the upward movement of the positioning member 32 relative to the installation cavity 211. In this way, the installation of the handlebar riser assembly 10 and the frame assembly 20 is achieved through the cooperation between the positioning column 121 and the positioning groove 212, the button 31 is engaged with the positioning member 32 when no external force is applied, and the blocking member 34 limits the positioning member 32. The handlebar riser assembly 10 is locked in the expanded position, and the installation steps are simple and efficient without the need for precise alignment. In addition, the cooperation of the overall structure of the positioning column 121 and the positioning groove 212 can effectively prevent shaking during steering and possible functional problems during use. When the user needs to fold the scooter, the user presses the button 31 to disengage the positioning member 32 from the button 31, and moves along the installation cavity. The steering riser 11 is pulled upward in the length direction of the body 211. Due to the limitation of the positioning member 32 by the blocking member 34, the bottom of the steering riser 11 moves upward relative to the positioning member 32, so that the positioning column 121 is disengaged from the positioning groove 212. At this time, the steering riser 11 can be rotated in the installation cavity 211 to rotate the handlebar riser assembly 10 to the folded position. During the rotation of the steering riser 11, due to the limitation of the positioning member 32 by the blocking member 34, the steering riser 11 can be prevented from falling out, which is beneficial to improving the user's operating experience; thereafter, the steering riser 11 is moved toward the positioning groove 212, so that the positioning column 121 is inserted into the positioning groove 212 again, and the button 31 is driven to move downward, so that the button 31 is engaged with the positioning member 32 again, and the locking and folding are realized, and the folding operation is convenient.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A scooter, comprising: A handlebar stem assembly, a frame assembly, and a front wheel and a rear wheel mounted on the frame assembly, wherein the handlebar stem assembly is mounted on the frame assembly and can move between an unfolded position and a folded position, and is characterized in that: The bicycle frame assembly further comprises a locking device capable of locking the handlebar stem assembly at the unfolded position and the folded position; the handlebar stem assembly comprises a steering stem and a positioning column arranged at the bottom of the steering stem; the frame assembly comprises an upwardly protruding connecting portion and a pedal platform connected to the connecting portion, the connecting portion is provided with a mounting cavity for mounting the bottom of the steering stem, and the bottom of the mounting cavity is provided with a positioning groove matched with the positioning column; The locking device comprises a button hinged to the steering riser and a positioning piece arranged inside the positioning column; the bottom of the button can be clamped to the top of the positioning piece when no external force is applied, and a retractable blocking piece is arranged inside the positioning piece, and when the blocking piece is extended, it can be used to limit the upward movement of the positioning piece relative to the installation cavity; when the positioning column is separated from the positioning groove, the steering riser can rotate relative to the installation cavity; The top of the installation cavity is connected with an annular sheet; The outer end of the blocking member is a spherical structure; when the blocking member is extended, the distance between the outer end and the axis of the positioning member is greater than the radius of the annular sheet; At least one group of blocking members is provided in the positioning member, and two blocking members in one group are relatively arranged in the positioning member; the inner edge of the top of the annular sheet is provided with a guiding inclined surface for the outer end of the blocking member to slide; The bottom of the steering standpipe is connected with a split pipe sleeve, and the positioning column is formed at the bottom of the pipe sleeve; A first elastic member is connected between the bottom of the positioning member and the positioning column; A cylindrical portion is further provided between the main body of the sleeve and the positioning column, and the installation cavity has an annular cavity for the cylindrical portion to rotate; The first elastic member is a spring, and the bottom of the positioning member is provided with a sleeve column for the first end of the first elastic member to sleeve, and the second end of the first elastic member abuts against the inner surface of the positioning column; A rotating boss is provided on the top of the annular cavity, and a rotating space for the outer end of the blocking member to rotate is formed between the rotating boss and the annular sheet.

2. The scooter according to claim 1, characterized in that: The positioning member is installed in the cylindrical part. The cylindrical part is provided with a strip groove along its length direction. The outer end of the blocking member can extend out of the strip groove.

3. The scooter according to claim 1, characterized in that: A first hook portion is provided at the bottom of the button, and a second hook portion that can be engaged with the first hook portion is provided at the top of the positioning member; a second elastic member is connected between the first hook portion and the tube sleeve; and an inclined surface is provided on both the first hook portion and the second hook portion.

4. The scooter according to claim 1, characterized in that: The connecting portion is provided with a clearance groove, and when the positioning column is installed in the positioning groove, the clearance groove is arranged opposite to the blocking member.

5. The scooter according to any one of claims 1 to 4, characterized in that: The positioning column is a square structure, and the positioning groove is also a square groove; the angle formed between the axis of the installation cavity and the plane where the extension direction of the pedal platform is located is 45°.

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