One-key folding device of handlebar

The one-key folding device for handlebars addresses the complexity and volume issues by enabling quick, tool-free folding and locking, enhancing user experience and practicality through a simplified mechanism.

CN222136930UActive Publication Date: 2024-12-10SHANGHAI LUNJINGHE TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202420988602.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Priority Date
2024-05-03
Filing Date
2024-05-08
Publication Date
2024-12-10
Estimated Expiration
2034-05-08

AI Technical Summary

Technical Problem

Existing folding bicycles and electric vehicles face challenges in independently folding handlebars, resulting in increased volume and complexity due to separate folding of left and right handlebars, which are not fixed or require screws for locking, affecting user experience and practicality.

Method used

A one-key folding device for handlebars featuring a one-key folding mechanism and tightening mechanism, allowing the handlebars to be unlocked and folded with a single button, utilizing a handlebar lock pin, folding unlock button, spring fixing pressure plate, and anti-loosening spring to achieve a compact, fixed fold.

Benefits of technology

The device simplifies the folding process, reduces volume, and enhances user experience by allowing quick, tool-free folding and locking, minimizing space occupation and improving practicality.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a one-key folding device for handlebars, which comprises a headstock vertical tube seat, and a left handlebar and a right handlebar which are arranged on two sides of the headstock vertical tube seat and are rotatably connected with the headstock vertical tube seat, and is characterized by further comprising a one-key folding mechanism and a tightening mechanism, the turning handle lock pin is arranged at the end of the headstock stand pipe seat, the two ends of the turning handle lock pin abut against the left handlebar and the right handlebar at the same time, the folding unlocking key is arranged on the inner side of the headstock stand pipe seat and rotationally connected with the headstock stand pipe seat, the inner end of the folding unlocking key abuts against the turning handle lock pin, and the tightening mechanism comprises a spring fixing pressing plate and an anti-loosening spring. The spring fixing pressing plate is connected with the end of the headstock stand pipe seat, one end of the anti-loosening spring abuts against the end face of the rotating handle lock pin, and the other end of the anti-loosening spring abuts against the spring fixing pressing plate. The folding device is simple in structure, capable of being unlocked and folded through one key, small in size after being folded, small in occupied space and simpler and quicker to operate.
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Description

Technical Field

[0001] The utility model relates to a folding device, in particular to a one-button folding device for handlebars of a folding bicycle or a folding electric vehicle. Background Art

[0002] As environmental awareness and leisure trends have gradually increased in recent years, more and more people are choosing bicycles and electric vehicles as a means of transportation for travel or short distances. Therefore, foldable bicycles and foldable electric vehicles have become the new favorites in the market because of their convenience in carrying.

[0003] In order to reduce weight and to be able to disassemble and adjust the length quickly, most folding bicycles and folding electric vehicles use a large number of quick-release devices. However, the handlebars, which are an important part of folding bicycles and folding electric vehicles, cannot be folded independently in most of the existing technologies, and still use the more traditional fixed installation, so that the folding bicycles and folding electric vehicles cannot be folded to the minimum volume. Therefore, the space occupied by folding bicycles and folding electric vehicles cannot be further reduced. In recent years, although some folding handlebar products have been launched, the structure of such folding handlebars is relatively complex and generally large in size. In addition, due to structural limitations, the left and right handlebars must be folded separately, and due to the constraints of the folding structure, the ultimate position after folding is not fixed and cannot be locked, or it needs to be locked with screws, which makes the folding operation time long, affecting the user experience, and also reduces the practicality of folding bicycles and folding electric vehicles. Summary of the invention

[0004] The utility model aims to provide a one-key folding device for handlebars which is simple in structure, can be unlocked and folded with one key, has a small volume after folding, reduces the occupied space, and is simpler and faster to operate.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: a one-key folding device for handlebars, comprising a front stem seat, and a left handlebar and a right handlebar arranged on both sides of the front stem seat and rotatably connected thereto, and its innovative point is: it also includes a one-key folding mechanism and a tightening mechanism,

[0006] The ends of the left handlebar and the right handlebar are respectively inserted into the interior of the front stem seat, and are rotatably connected to the front stem seat through the left handlebar rotating shaft and the right handlebar rotating shaft.

[0007] The one-key folding mechanism includes a handlebar lock pin and a folding unlock button. The handlebar lock pin is arranged at the end of the front stem seat, and both ends of the handlebar lock pin abut against the left handlebar and the right handlebar to lock them, so that the handlebars remain in an open state. The folding unlock button is arranged on the inner side of the front stem seat and is rotatably connected thereto. The inner end of the folding unlock button abuts against the handlebar lock pin.

[0008] The tightening mechanism includes a spring fixing pressure plate and an anti-loosening spring. The spring fixing pressure plate is detachably connected to the end of the front standpipe seat, and the spring fixing pressure plate and the handlebar lock pin form a cavity for accommodating the anti-loosening spring. One end of the anti-loosening spring abuts against the end surface of the handlebar lock pin, and the other end abuts against the spring fixing pressure plate.

[0009] The folding unlock button is pressed, and the folding unlock button rotates relative to the front stem seat and the inner end of the folding unlock button drives the handlebar lock pin to move upward, thereby releasing the lock of the handlebar lock pin on the left and right handlebars. The left and right handlebars fall down under the action of gravity, and at the same time, combined with the action of the tightening mechanism, the handlebars are kept in a folded state.

[0010] In the above technical solution, both ends of the interior of the front stem seat have stem seat grooves, the end of the left handlebar has a left handlebar groove, and the end of the right handlebar has a right handlebar groove. Both ends of the handlebar lock pin are provided with locking blocks. The middle part of the locking block at one end of the handlebar lock pin is clamped in the left handlebar groove of the left handlebar, and at the same time, the two ends of the locking block are slidably matched with the stem seat grooves corresponding to the front stem seat, and the middle part of the locking block at the other end of the handlebar lock pin is clamped in the right handlebar groove of the right handlebar, and at the same time, the two ends of the locking block are slidably matched with the stem seat grooves corresponding to the front stem seat.

[0011] In the above technical solution, the outer circumferential surface of the inner end of the left handlebar has an arc-shaped guide surface for facilitating the stretching or folding of the left handlebar, and the arc-shaped guide surface is provided with a left limiting pit. The outer circumferential surface of the inner end of the right handlebar has an arc-shaped guide surface for facilitating the stretching or folding of the right handlebar, and the arc-shaped guide surface is provided with a right limiting pit. When the handlebars are rotated and folded, the locking blocks at both ends of the turning handlebar lock pin disengage from the left handlebar groove and the right handlebar groove and respectively abut against the left limiting pit and the right limiting pit, and the handlebar is kept in a folded state under the pressure of the anti-loosening spring.

[0012] In the above technical solution, the middle part of the throttle lock pin has a lock hook, and the lock hook is located inside the front stem seat, and the inner end of the folding unlock button penetrates into the front stem seat and hooks on the lock hook of the throttle lock pin.

[0013] In the above technical solution, a connecting ear is provided on the inner side of the front stem seat, and the folding unlocking button is rotatably connected to the connecting ear of the front stem seat via a connecting pin.

[0014] In the above technical solution, the folding unlock button includes an unlock handle and an unlock rod which are connected as one body. The unlock handle is rotatably connected to the inner side of the front stem seat through a connecting lock pin, and the unlock rod penetrates the front stem seat and abuts against the handlebar lock pin.

[0015] In the above technical solution, the unlocking handle has a pin sleeve, and the pin sleeve is rotatably connected to a connecting ear provided on the inner side of the headstock standpipe seat through a connecting lock pin.

[0016] In the above technical solution, the unlocking handle is in a T-shaped structure as a whole.

[0017] In the above technical solution, the spring fixing pressure plate includes a spring limiting plate and connecting legs arranged on both sides of the spring limiting plate, the connecting legs are detachably connected to the front stem seat, and the spring limiting plate is located above the end of the throttle lock pin, so that a cavity for accommodating the anti-loosening spring is constructed between the spring limiting plate and the throttle lock pin.

[0018] In the above technical solution, a spring limiting groove is provided at the end of the throttle lock pin, one end of the anti-loosening spring abuts in the spring limiting groove, and the other end abuts against the inner wall of the spring limiting plate.

[0019] The positive effect of the utility model is that after the one-key folding device of the handlebar of the utility model is adopted, since the utility model also includes a one-key folding mechanism and a tightening mechanism,

[0020] The ends of the left handlebar and the right handlebar are respectively inserted into the interior of the front stem seat, and are rotatably connected to the front stem seat through the left handlebar rotating shaft and the right handlebar rotating shaft.

[0021] The one-key folding mechanism includes a handlebar lock pin and a folding unlock button. The handlebar lock pin is arranged at the end of the front stem seat, and both ends of the handlebar lock pin abut against the left handlebar and the right handlebar to lock them, so that the handlebars remain in an open state. The folding unlock button is arranged on the inner side of the front stem seat and is rotatably connected thereto. The inner end of the folding unlock button abuts against the handlebar lock pin.

[0022] The tightening mechanism includes a spring fixing pressure plate and an anti-loosening spring. The spring fixing pressure plate is detachably connected to the end of the front standpipe seat, and the spring fixing pressure plate and the handlebar lock pin form a cavity for accommodating the anti-loosening spring. One end of the anti-loosening spring abuts against the end surface of the handlebar lock pin, and the other end abuts against the spring fixing pressure plate.

[0023] The folding unlock button is pressed, and the folding unlock button rotates relative to the front stem seat, and the inner end of the folding unlock button drives the handlebar lock pin to move upward. At this time, the handlebar lock pin releases the lock on the left and right handlebars, and the handlebars also rotate 90 degrees from the initial horizontal state relative to the front stem seat. The left and right handlebars fall down under the action of gravity, and at the same time, combined with the action of the tightening mechanism, the handlebars are kept in the folded state.

[0024] The advantages of the one-button folding device for handlebars of the present invention are: first, the folding structure is simple, replacing the complex folding handlebar structure in the prior art; second, the volume is small, and the handlebars are tightly attached to the front stem seat after folding, which can greatly reduce the width of the handlebars after folding, thereby folding the foldable bicycle and the foldable electric vehicle to the smallest volume, and also minimizes the occupied space, making travel more convenient; third, the operation is simple and quick, when opening, it is only necessary to lift the handlebars upward until they are locked horizontally, and when unlocking, it is only necessary to press the unlocking button to complete the folding of the handlebars, so that the opening and unlocking of the handlebars takes less than 0.5 seconds. The folding structure of the present invention can be combined with the restriction of the tightening mechanism after folding, so that it can be fixed and locked in the folded position, and no additional screws are required for locking, which improves the user experience and the practicality of the foldable bicycle and the foldable electric vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural schematic diagram of a specific implementation mode of the utility model;

[0026] Figure 2 It is a schematic diagram of the full cross-section structure of the utility model (open state);

[0027] Figure 3 yes Figure 2 AA cross-sectional view of ;

[0028] Figure 4 yes Figure 2 BB cross-sectional view;

[0029] Figure 5 It is a schematic diagram of the state of the utility model during the folding process;

[0030] Figure 6 It is a schematic diagram of the utility model in a folded state. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the accompanying drawings and given embodiments, but is not limited thereto.

[0032] like Figure 1 , 2 , 3, 4, 5, and 6, a one-touch folding device for handlebars includes a front stem seat 1, and a left handlebar 2 and a right handlebar 3 disposed on both sides of the front stem seat 1 and rotatably connected thereto, and also includes a one-touch folding mechanism 4 and a tightening mechanism 5.

[0033] The ends of the left handlebar 2 and the right handlebar 3 are respectively inserted into the interior of the front stem seat 1 and are rotatably connected to the front stem seat 1 through the left handlebar rotating shaft 21 and the right handlebar rotating shaft 31.

[0034] The one-key folding mechanism 4 includes a handlebar lock pin 41 and a folding unlock button 42. The handlebar lock pin 41 is arranged at the end of the front stem seat 1, and both ends of the handlebar lock pin 41 abut against the left handlebar 2 and the right handlebar 3 to lock them, so that the handlebars remain in an open state. The folding unlock button 42 is arranged on the inner side of the front stem seat 1 and is rotatably connected thereto. The inner end of the folding unlock button 42 abuts against the handlebar lock pin 41.

[0035] The tightening mechanism 5 includes a spring fixing plate 51 and an anti-loosening spring 52. The spring fixing plate 51 is detachably connected to the end of the front stem seat 1, and the spring fixing plate 51 and the handlebar lock pin 41 form a cavity for accommodating the anti-loosening spring 52. One end of the anti-loosening spring 52 abuts against the end surface of the handlebar lock pin 41, and the other end abuts against the spring fixing plate 51.

[0036] The folding unlock button 42 is pressed to overcome the resistance of the anti-loosening spring 52, and the folding unlock button 42 rotates relative to the front stem seat 1 and its inner end drives the handlebar lock pin 41 to move upward, releasing the lock of the left handlebar 2 and the right handlebar 3 by the handlebar lock pin 41, and the left handlebar 2 and the right handlebar 3 fall down under the action of gravity. At the same time, combined with the action of the tightening mechanism 5, the handlebars are kept in a folded state.

[0037] like Figure 2 , 3 As shown in , 4, in order to ensure that the handlebars can be locked and stretched when in the open state and to ensure the stability of the opening, both ends of the interior of the head stem seat 1 have stem seat grooves 11, the end of the left handlebar 2 has a left handlebar groove 22, and the end of the right handlebar 3 has a right handlebar groove 32, and both ends of the turn handle lock pin 41 are provided with locking blocks 411, and the middle part of the locking block 411 at one end of the turn handle lock pin 41 is clamped in the left handlebar groove 22 of the left handlebar 2, and at the same time, the two ends of the locking block 411 are slidably matched with the stem seat grooves 11 corresponding to the head stem seat 1, and the middle part of the locking block 411 at the other end of the turn handle lock pin 41 is clamped in the right handlebar groove 32 of the right handlebar 3, and at the same time, the two ends of the locking block 411 are slidably matched with the stem seat grooves 11 corresponding to the head stem seat 1. That is, the lock blocks 411 at both ends of the handlebar lock pin 41 are respectively abutted in the corresponding handlebar grooves under the guidance of the stem seat groove 11, so that the handlebar and the stem seat are connected as a whole, ensuring the stability of the handlebar when opened to a horizontal state.

[0038] like Figure 5As shown, in order to facilitate the handlebars to smoothly enter the locking position during the opening process and smoothly slide to the folded position when folding, the inner end outer circumference of the left handlebar 2 has an arc-shaped guide surface for facilitating the stretching or folding of the left handlebar, and the arc-shaped guide surface is provided with a left limiting pit 23, and the inner end outer circumference of the right handlebar 3 has an arc-shaped guide surface for facilitating the stretching or folding of the right handlebar, and the arc-shaped guide surface is provided with a right limiting pit 33. When the handlebars are rotated and folded, the locking blocks 411 at both ends of the turning handlebar lock pin 41 disengage from the left handlebar groove 22 and the right handlebar groove 32 and respectively abut against the left limiting pit 23 and the right limiting pit 33, and the handlebars are kept in a folded state under the pressure of the anti-loosening spring 52. The depth of the limiting pit is smaller than the depth of the groove. Specifically, during the rotation of the handlebar, the handlebar slides smoothly under the action of the arc guide surface until the handlebar is opened and locked. When folding, it also slides to the folded position along the arc guide surface. When the handlebar is in the folded state, the handlebar lock pin 41 abuts against the limiting pit and, under the pressure of the anti-loosening spring, ensures that the handlebar is locked in the folded position without loosening or shaking, thereby increasing the force applied to the handlebar to overcome the pressure of the spring and rotate the handlebar to a horizontal open position.

[0039] like Figure 3 As shown, in order to ensure that the left and right handlebars can be unlocked at the same time by using the handlebar lock pin under the one-touch operation of the folding unlocking button, and to overcome the drawback that the prior art still requires two hands to operate, the middle part of the handlebar lock pin 41 has a lock hook 412, and the lock hook 412 is located inside the front stem seat 1, and the inner end of the folding unlocking button 42 penetrates the front stem seat 1 and hooks on the lock hook 412 of the handlebar lock pin 41. That is, the lock hook 412 has a semicircular hook groove, and the head of the inner end of the folding unlocking button 42 has a circular protrusion, and the circular protrusion is inserted into the semicircular hook groove, so that the folding unlocking button 42 is operated to make the handlebar lock pin 41 slide up and down along the stem seat groove 11.

[0040] like Figure 1 As shown, in order to facilitate the assembly of the folding unlock button and the front stem seat, a connecting ear 12 is provided on the inner side of the front stem seat 1, and the folding unlock button 42 is rotatably connected to the connecting ear 12 of the front stem seat 1 through a connecting pin.

[0041] like Figure 1 , 3 As shown, in order to further optimize the folding unlock button structure and make it simpler and more reasonable, the folding unlock button 42 includes an unlock handle 421 and an unlock rod 422 connected as one body. The unlock handle 421 is rotatably connected to the inner side of the front stem seat 1 through a connecting lock pin, and the unlock rod 422 penetrates the front stem seat 1 and abuts against the handlebar lock pin 41. Specifically, the circular protrusion at the inner end of the unlock rod 422 is inserted into the semicircular hook groove of the lock hook 412.

[0042] like Figure 1 As shown, in order to improve the assembly efficiency of the unlocking handle and the headstock seat, the unlocking handle 421 has a pin sleeve, and the pin sleeve is rotatably connected to the connecting ear 12 provided on the inner side of the headstock seat 1 through a connecting lock pin.

[0043] Furthermore, in order to provide a reasonable unlocking handle structure, as Figure 1 As shown, the unlocking handle 421 of the present invention is in a T-shaped structure as a whole.

[0044] like Figure 1 As shown, in order to prevent the handlebar from loosening after being folded, the anti-loosening spring is used to limit and press the handlebar. The spring fixing pressure plate 51 includes a spring limiting plate 511 and connecting legs 512 arranged on both sides of the spring limiting plate 511. The connecting legs 512 are detachably connected to the front stem seat 1. The spring limiting plate 511 is located above the end of the handlebar lock pin 41, so that a cavity for accommodating the anti-loosening spring 52 is constructed between the spring limiting plate 511 and the handlebar lock pin 41.

[0045] like Figure 3 As shown, in order to limit the anti-loosening spring and prevent the spring from twisting when compressed or reset, which affects the locking of the handlebars when folded, a spring limiting groove is provided at the end of the handlebar lock pin 41, and one end of the anti-loosening spring 52 abuts against the spring limiting groove, and the other end abuts against the inner wall of the spring limiting plate 511.

[0046] The working process of this utility model:

[0047] like Figure 2 As shown, when the handlebar is in the open state, the lock blocks 411 at both ends of the handlebar lock pin 41 are respectively inserted into the left handlebar groove 22 and the right handlebar groove 32, and the handlebar is in a horizontally stretched state.

[0048] like Figure 5 As shown, when the handlebar is folded, the folding unlock button 42 is pressed to overcome the resistance of the anti-loosening spring 52, and the folding unlock button 42 rotates relative to the front stem seat 1, and the circular protrusion of the unlocking rod 422 hooks the lock hook 412 to drive the handlebar lock pin 41 to slide upward along the stem seat groove 11, and the lock blocks 411 at both ends of the handlebar lock pin 41 are separated from the left handlebar groove 22 and the right handlebar groove 32, releasing the lock of the handlebar lock pin 41 on the left handlebar 2 and the right handlebar 3, and slides to the folding position (the handlebar is rotated 90°) along the arc guide surface of the handlebar under the action of gravity, as shown in FIG. Figure 6 As shown, at this time, the handlebar lock pin 41 abuts against the left limit pit 23 and the right limit pit 33, and the handlebar is kept in a folded state under the pressure of the anti-loosening spring 52. Of course, increasing the force applied to the handlebar can overcome the pressure of the anti-loosening spring 52 and lift the handlebar to the open position.

[0049] The advantages of the one-key folding device for handlebars of the utility model are:

[0050] First, the folding structure is simple. The relevant locking and unlocking mechanism only includes a handlebar lock pin, a folding unlocking button, a spring fixing pressure plate and an anti-loosening spring, which replaces the complex folding handlebar structure in the prior art, making the structure not only simple but also low in cost.

[0051] Second, the volume is small. After folding, the handlebars and the front stem seat are close together, which can greatly reduce the width of the handlebars after folding, thereby folding the folding bicycle and folding electric vehicle to the smallest volume, and also minimize the occupied space, making it more convenient to travel and carry.

[0052] Third, the operation is simple and quick. When opening, you only need to lift the handlebars up until they are locked horizontally. When unlocking, you only need to press the unlock button to complete the folding of the handlebars, so that the opening and unlocking of the handlebars takes less than 0.5 seconds. The folding structure of the utility model can be combined with the restriction of the tightening mechanism after folding to fix and lock it in the folded position, and no additional screws are required for locking, which improves the user experience and the practicality of the folding bicycle and folding electric vehicle.

[0053] Fourth, the independent folding position, by designing the groove angle and depth, the folding position can be designed to be locked or semi-locked at any position (increasing the applied force to unlock the lock). If necessary, the folding position of the left and right handlebars can be designed to different angles, making the control more flexible and convenient.

[0054] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A one-touch folding device for handlebars, comprising a front stem seat (1), and a left handlebar (2) and a right handlebar (3) disposed on both sides of the front stem seat (1) and rotatably connected thereto, characterized in that: It also includes a one-touch folding mechanism (4) and a tightening mechanism (5). The ends of the left handlebar (2) and the right handlebar (3) are respectively inserted into the interior of the front stem seat (1), and are rotatably connected to the front stem seat (1) via the left handlebar rotating shaft (21) and the right handlebar rotating shaft (31). The one-touch folding mechanism (4) comprises a handlebar lock pin (41) and a folding unlock button (42). The handlebar lock pin (41) is arranged at the end of the front stem seat (1), and both ends of the handlebar lock pin (41) simultaneously abut against the left handlebar (2) and the right handlebar (3) to lock them, so that the handlebars remain in an open state. The folding unlock button (42) is arranged on the inner side of the front stem seat (1) and is rotatably connected thereto. The inner end of the folding unlock button (42) abuts against the handlebar lock pin (41). The tightening mechanism (5) comprises a spring fixing pressure plate (51) and an anti-loosening spring (52); the spring fixing pressure plate (51) is detachably connected to the end of the vehicle head riser seat (1); the spring fixing pressure plate (51) and the handlebar lock pin (41) form a cavity for accommodating the anti-loosening spring (52); one end of the anti-loosening spring (52) abuts against the end surface of the handlebar lock pin (41), and the other end abuts against the spring fixing pressure plate (51); When the folding unlock button (42) is pressed, the folding unlock button (42) rotates relative to the front stem seat (1) and the inner end thereof drives the handlebar lock pin (41) to move upward, thereby releasing the lock of the handlebar lock pin (41) on the left handlebar (2) and the right handlebar (3). The left handlebar (2) and the right handlebar (3) fall down under the action of gravity, and at the same time, in combination with the action of the tightening mechanism (5), the handlebars are kept in a folded state.

2. The one-touch folding device for handlebars according to claim 1, characterized in that: Both ends of the interior of the front stem tube seat (1) are provided with stem tube seat grooves (11), the end of the left handlebar (2) is provided with a left handlebar groove (22), the end of the right handlebar (3) is provided with a right handlebar groove (32), and both ends of the handlebar lock pin (41) are provided with locking blocks (411), the middle part of the locking block (411) at one end of the handlebar lock pin (41) is clamped in the left handlebar groove (22) of the left handlebar (2), and at the same time, the two ends of the locking block (411) are slidably matched with the stem tube seat grooves (11) corresponding to the front stem tube seat (1), the middle part of the locking block (411) at the other end of the handlebar lock pin (41) is clamped in the right handlebar groove (32) of the right handlebar (3), and at the same time, the two ends of the locking block (411) are slidably matched with the stem tube seat grooves (11) corresponding to the front stem tube seat (1).

3. The one-touch folding device for handlebars according to claim 2, characterized in that: The inner end outer circumference of the left handlebar (2) has an arc-shaped guide surface for facilitating the stretching or folding of the left handlebar, and the arc-shaped guide surface is provided with a left limit pit (23); the inner end outer circumference of the right handlebar (3) has an arc-shaped guide surface for facilitating the stretching or folding of the right handlebar, and the arc-shaped guide surface is provided with a right limit pit (33); when the handlebars are rotated and folded, the locking blocks (411) at both ends of the turning handle lock pin (41) are separated from the left handlebar groove (22) and the right handlebar groove (32) and respectively abut against the left limit pit (23) and the right limit pit (33), and the handlebars are kept in a folded state under the pressure of the anti-loosening spring (52).

4. The one-touch folding device for handlebars according to claim 3, characterized in that: The middle portion of the throttle lock pin (41) is provided with a lock hook (412), and the lock hook (412) is located inside the vehicle head riser seat (1), and the inner end of the folding unlocking button (42) penetrates into the vehicle head riser seat (1) and is hooked on the lock hook (412) of the throttle lock pin (41).

5. The one-touch folding device for handlebars according to claim 1, characterized in that: A connecting ear (12) is provided on the inner side of the vehicle head riser seat (1), and the folding unlocking button (42) is rotatably connected to the connecting ear (12) of the vehicle head riser seat (1) via a connecting pin.

6. The one-touch folding device for handlebars according to claim 1, characterized in that: The folding unlocking button (42) comprises an unlocking handle (421) and an unlocking rod (422) which are connected as one body. The unlocking handle (421) is rotatably connected to the inner side of the vehicle head riser seat (1) via a connecting lock pin. The unlocking rod (422) penetrates into the vehicle head riser seat (1) and abuts against the turning handle lock pin (41).

7. The one-touch folding device for handlebars according to claim 6, characterized in that: The unlocking handle (421) has a pin sleeve, and the pin sleeve is rotatably connected to a connecting ear (12) provided on the inner side of the headstock standpipe seat (1) via a connecting lock pin.

8. The one-touch folding device for handlebars according to claim 6, characterized in that: The unlocking handle (421) is in a T-shaped structure as a whole.

9. The one-touch folding device for handlebars according to claim 1, characterized in that: The spring fixing pressure plate (51) comprises a spring limiting plate (511) and connecting legs (512) arranged on both sides of the spring limiting plate (511), wherein the connecting legs (512) are detachably connected to the front stem seat (1), and the spring limiting plate (511) is located above the end of the throttle lock pin (41), so that a cavity for accommodating the anti-loosening spring (52) is constructed between the spring limiting plate (511) and the throttle lock pin (41).

10. The one-touch folding device for handlebars according to claim 9, characterized in that: A spring limiting groove is provided at the end of the turning handle lock pin (41), one end of the anti-loosening spring (52) abuts against the spring limiting groove, and the other end abuts against the inner wall of the spring limiting plate (511).