Folding bicycle vertical tube folding self-locking structure

Abstract

A folding self-locking structure for the vertical tube of a folding bicycle includes a first seat and a second seat, which are hinged to each other along one side edge. It also includes: a movable handle, one end of which is hinged to the free end of the first seat; a connecting rod, one end of which is hinged to the free end of the second seat, and the other end of which is hinged to the middle section of the movable handle; a locking block formed on the second seat; and a locking structure movably mounted on the connecting rod. When the first and second seats are in a mating state, the locking structure is driven to lock or disengage with the locking block. When the locking structure and the locking block are locked, the movable handle and the connecting rod are collinear. This technical solution reduces the force applied to the movable handle, allowing users to perform locking operations more conveniently and quickly.

Description

Technical Field

[0001] This utility model relates to the field of folding bicycle technology, specifically to a folding bicycle vertical tube folding self-locking structure. Background Technology

[0002] In today's pursuit of a healthy lifestyle, cycling is becoming increasingly popular, and compared to traditional bicycles, folding bicycles are favored by many users due to their compact size and portability.

[0003] In current folding bicycles, folding structures are usually set in the frame and stem. Simply put, the frame or stem is set as two parts that are hinged to each other, so that the folding effect can be achieved along the hinge axis. At the same time, a fixing structure is set in the hinge position to fix the two parts together after they are unfolded, thus forming a bicycle with a fixed structure to facilitate riding for the user.

[0004] For example, Chinese utility model patent CN209650452U, entitled "Self-locking Folding Device," discloses a self-locking folding device. During the self-locking process after folding the upper and lower joints, pulling the handle can cause the upper and lower joints to engage with each other, and the buckle on the latch will engage with the self-locking boss. At the same time, one end of the connecting rod is rotatably connected to the self-locking boss. During the process of the buckle and the self-locking boss contacting and engaging, because the lever arm between the engagement position and the pivot of the connecting rod and the self-locking boss is small, a large pushing force is required when pulling the handle to engage the buckle and the self-locking boss, making the operation inconvenient.

[0005] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this utility model is to provide a folding self-locking structure for the vertical tube of a folding bicycle to solve the above-mentioned technical problems. The technical solution adopted by this utility model is as follows:

[0007] A folding self-locking structure for the vertical tube of a folding bicycle includes a first seat and a second seat, wherein the first seat and the second seat are hinged to each other along one side edge, and further includes:

[0008] A movable handle, one end of which is hinged to the free end of the first seat;

[0009] A connecting rod, one end of which is hinged to the free end of the second seat, and the other end of which is hinged to the middle section of the movable handle;

[0010] A locking block is formed on the second base body and is located on the lower side of the pivot point between the connecting rod and the second base body along the axial direction of the second base body.

[0011] A locking structure is movably mounted on the connecting rod. When the first seat and the second seat are in a docking state, the locking structure is driven to lock or separate from the locking block.

[0012] When the locking structure and the locking block are locked together, the movable handle and the connecting rod are collinear.

[0013] Furthermore, the locking structure includes:

[0014] A locking component, wherein the locking component is slidably connected to the connecting rod along the axis of the connecting rod, and one end of the locking component is formed with a groove that engages with the locking block;

[0015] An elastic element is fitted onto the connecting rod and abuts against the end of the locking element opposite to the slot, providing an elastic thrust toward the slot.

[0016] Furthermore, a protrusion is formed on the circumferential surface of the locking member, the slot is formed on the end face of the protrusion, and a guide slope is also formed on the end face of the protrusion where the slot is formed.

[0017] Furthermore, a driving portion is also formed on the circumferential surface of the locking member, and the driving portion extends along the radial direction of the locking member.

[0018] Furthermore, the locking block includes a rod portion connected to the second base body and a block portion located at the upper end of the rod portion, wherein the diameter of the block portion is larger than the diameter of the rod portion.

[0019] Furthermore, a first connecting seat is formed on the circumferential surface of the first seat, and one end of the movable handle is pivotally connected to the first connecting seat; a second connecting seat corresponding to the first connecting seat is formed on the circumferential surface of the second seat, and one end of the connecting rod is pivotally connected to the second connecting seat.

[0020] Furthermore, a receiving groove corresponding to the second connecting seat and the connecting rod is provided on the side wall of the movable handle facing the connecting rod, and the end of the movable handle away from the first seat body is defined as the pulling end.

[0021] Furthermore, along the axial direction of the second seat, the locking block is formed on the side of the second connecting seat away from the first seat, and the size of the locking block protruding radially along the second seat is smaller than the size of the second connecting seat protruding radially along the second seat.

[0022] Furthermore, the locking block is formed by bolts threaded onto the second base body.

[0023] The beneficial effects of this utility model are as follows:

[0024] The technical solution provided by this utility model comprises a first seat, a second seat, a movable handle, and a connecting rod, forming a four-bar linkage. When the movable handle is driven, the first and second seats can swing, allowing them to engage and disengage, thus improving the portability of the bicycle during folding and unfolding. Furthermore, when locking the engaged first and second seats, the movable handle engages the locking structure with the locking block. Because the locking block is positioned a certain distance from the pivot point between the connecting rod and the second seat, the lever arm of the locking block is increased during engagement. This reduces the force applied to the movable handle during operation, making locking easier and faster for the user. After locking, the movable handle and connecting rod are collinear, forming a dead point, further improving stability in the locked state. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the first and second seats in the folded and docked state of this utility model.

[0026] Figure 2 This is a structural diagram of the first and second seats in the folded-out state of this utility model.

[0027] Figure 3 This is a schematic diagram of the exploded structure of this utility model.

[0028] Figure 4 This is a schematic diagram of the connecting rod and locking structure in this utility model.

[0029] Figure 5 This is an exploded structural diagram of the connecting rod and locking structure in this utility model.

[0030] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle.

[0031] Figure 7 This is a cross-sectional view of the present invention along the axial direction.

[0032] In the diagram: 100 - First seat; 200 - Second seat; 300 - Movable handle; 400 - Connecting rod; 220 - Locking block; 221 - Rod portion; 222 - Block portion; 510 - Locking element; 511 - Locking groove; 520 - Elastic element; 512 - Protrusion; 513 - Guide slope; 514 - Drive portion; 110 - First connecting seat; 210 - Second connecting seat; 301 - Receiving groove; 302 - Pull end. Detailed Implementation

[0033] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0034] This utility model provides a self-locking structure for the vertical tube of a folding bicycle. This structure allows for self-locking when the vertical tube is in its folded position. After the vertical tube is folded and joined, it self-locks, maintaining a stable position in the joined state, allowing the bicycle to be used in its unfolded state for normal riding. This also ensures the vertical tube maintains sufficient strength. Unlocking the structure allows the vertical tube to fold, enabling the bicycle to be folded and stored. This technical solution makes operating the self-locking structure more convenient, requires less force, and is easier for the user to operate. Furthermore, it ensures sufficient stability in the self-locked state.

[0035] In this embodiment, as Figure 1-7As shown, this utility model embodiment provides a folding bicycle stem folding self-locking structure, including a first seat 100 and a second seat 200, which are hinged to each other on one side edge. It also includes a movable handle 300, a connecting rod 400, a locking block 220, and a locking structure. Specifically, one end of the movable handle 300 is hinged to the free end of the first seat 100; one end of the connecting rod 400 is hinged to the free end of the second seat 200, and the other end of the connecting rod 400 is hinged to the movable handle 300. The middle section of the bicycle is hinged; at this time, the first seat 100, the second seat 200, the movable handle 300, and the connecting rod 400 form a four-bar linkage 400 mechanism. When the movable handle 300 is driven, the first seat 100 and the second seat 200 can swing in opposite directions, thereby folding the bicycle. At the same time, the first seat 100 and the second seat 200 can also swing in opposite directions, thereby connecting the first seat 100 and the second seat 200 to form a normal bicycle, which is convenient for the user to ride. The locking block 220 is formed on the second seat 200. Along the axial direction of the second seat 200, the locking block 220 is located below the pivot point between the connecting rod 400 and the second seat 200. The locking structure is movably mounted on the connecting rod 400. When the first seat 100 and the second seat 200 are in the docking state, the locking structure is driven, causing the locking structure to lock or disengage with the locking block 220. When the movable handle 300 is driven and the first seat 100 and the second seat 200 are docked, the locking structure is driven, causing the locking structure to engage with the locking block 220 formed on the second seat 200, thereby locking the docked first seat 100 and the second seat 200 and keeping them stably in the unfolded state, thus forming an unfolded bicycle. This is because the locking structure is mounted on the connecting rod 400, and the locking block 220 is located along the axial direction of the second seat 200, below the pivot point between the connecting rod 400 and the second seat 200. The lower position of the pivot point increases the distance between the locking block 220 and the connecting rod 400 at the pivot point of the second seat 200. When the movable handle 300 is pushed to swing towards the second seat 200, the locking structure engages with the locking block 220. Because the lever arm of the locking block 220 is increased, a smaller thrust is needed to complete the engagement. This allows the user to complete the locking action more conveniently and quickly. Simultaneously, to ensure sufficient stability and strength of the first seat 100 and the second seat 200 in the docking state, the movable handle 300 and the connecting rod 400 are collinear when the locking structure and the locking block 220 are locked together. This places the movable handle 300 and the connecting rod 400 at a dead point position, ensuring sufficient stability of the first seat 100 and the second seat 200 in the docking state.

[0036] As is conceivable, during the assembly of a bicycle, the first seat 100 and the second seat 200 are connected to other components of the bicycle. In this embodiment, the first seat 100 can be connected to the bicycle stem, and the second seat 200 has a tube formed on it for connecting to the head tube of the bicycle. This allows the stem to be folded up by folding the first seat 100 and the second seat 200, thus folding the bicycle handlebars. It is also conceivable that this self-locking structure can be set at other folding positions on the bicycle to lock the folding position.

[0037] like Figure 2-6 As shown, in this embodiment, the locking structure includes a locking member 510 and an elastic member 520. Both the locking member 510 and the elastic member 520 are mounted on the connecting rod 400. Specifically, the locking member 510 is slidably connected to the connecting rod 400 along the axial direction of the connecting rod 400, and one end of the locking member 510 is formed with a groove 511 that engages with the locking block 220. The elastic member 520 is mounted on the connecting rod 400 and abuts against the end of the locking member 510 away from the groove 511, providing an elastic thrust toward the groove 511.

[0038] In this embodiment, the elastic element 520 is a spring fitted onto the connecting rod 400. Under the elastic support of the spring, the locking element 510 extends elastically toward the direction where the groove 511 is formed. In this embodiment, the elastic element 520 is located near the end where the connecting rod 400 and the movable handle 300 are pivotally connected. This allows the locking element 510 to be elastically pushed out toward the pivot point between the connecting rod 400 and the second seat 200. When the movable handle 300 is pushed, the first seat 100 and the second seat 200 are connected to each other. When the movable handle 300 drives the connecting rod 400 to rotate toward the second seat 200, the locking element 510 comes into contact with the locking block 220 and the locking block 220 is engaged in the groove 511. The elastic element 520 locks the locking element in place. At the same time, since the movable handle 300 and the connecting rod 400 are collinear, a dead point position is formed to ensure the reliability of locking the first seat 100 and the second seat 200.

[0039] In this embodiment, in order to further reduce the lever arm for locking the locking block 220 and to more easily engage the locking block 220 with the slot 511, as follows: Figure 5-6As shown, a protrusion 512 is formed on the circumferential surface of the locking member 510, and a slot 511 is formed on the end face of the protrusion 512. A guide slope 513 is also formed on the end face of the protrusion 512 with the slot 511. The protrusion 512 allows the connecting rod 400 to contact the locking block 220 via the guide slope 513 when the connecting rod 400 is in an inclined state. At this time, since the connecting rod 400 is still in an inclined state and not fully engaged with the second seat 200, the protrusion 512 increases the lever arm when engaging with the locking block 220, thereby reducing the force required to operate the movable handle 300. Simultaneously, the guide slope 513 allows the locking block 220 and the slot 511 to engage more quickly and smoothly, improving the ease of operation of the self-locking structure.

[0040] During the process of releasing the self-locking state, the locking member 510 is pulled towards the elastic member 520, thereby compressing the elastic member 520 and causing the slot 511 and the block 220 to separate from each other, thus releasing the self-locking state. This allows the first seat 100 and the second seat 200 to fold and separate from each other. To facilitate the operation of the locking member 510, a driving part 514 is also formed on the circumferential surface of the locking member 510, extending radially along the locking member 510. That is, pulling the driving part 514 towards the elastic member 520 will pull the locking member 510, thereby causing the block 220 and the slot 511 to separate from each other.

[0041] In this embodiment, as Figure 3 As shown, the locking block 220 includes a rod portion 221 connected to the second base 200 and a block portion 222 located at the upper end of the rod portion 221, the diameter of the block portion 222 being larger than the diameter of the rod portion 221. In this embodiment, the locking block 220 is constructed by a bolt threaded onto the second base 200. This structure reduces the manufacturing cost of the self-locking structure, improves assembly convenience, and ensures reliable engagement with the locking slot 511.

[0042] In this embodiment, to enable the first seat 100 and the second seat 200 to pivotally connect with the movable handle 300 and the connecting rod 400 respectively, a first connecting seat 110 is formed on the circumferential surface of the first seat 100, and one end of the movable handle 300 is pivotally connected to the first connecting seat 110; a second connecting seat 210 corresponding to the first connecting seat 110 is formed on the circumferential surface of the second seat 200, and one end of the connecting rod 400 is pivotally connected to the second connecting seat 210. By providing two connecting seats, the ease of pivoting the movable handle 300 and the connecting rod 400 with the two seats can be improved.

[0043] Meanwhile, in order to prevent the second connecting seat 210 from interfering with the movable handle 300 when it is driven, a receiving groove 301 corresponding to the second connecting seat 210 and the connecting rod 400 is provided on the side wall of the movable handle 300 facing the connecting rod 400, and the end of the movable handle 300 away from the first seat 100 is defined as the pull end 302. The pull end 302 is used to drive the movable handle 300, and during the locking process, it can accommodate the second connecting seat 210 and the connecting rod 400 inside it.

[0044] When the first seat 100 and the second seat 200 are docked and locked together, in order to reduce the lever arm when engaging with the locking block 220, the locking block 220 is formed on the side of the second connecting seat 210 away from the first seat 100 along the axial direction of the second seat 200, and the radial protrusion of the locking block 220 along the second seat 200 is smaller than the radial protrusion of the second connecting seat 210 along the second seat 200.

[0045] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A folding bicycle vertical tube folding self-locking structure, comprising a first seat body and a second seat body, the first seat body and the second seat body are hingedly connected at one side edge, characterized in that, It also includes: A movable handle, one end of which is hinged to the free end of the first seat; A connecting rod, one end of which is hinged to the free end of the second seat, and the other end of which is hinged to the middle section of the movable handle; A locking block is formed on the second base body and is located on the lower side of the pivot point between the connecting rod and the second base body along the axial direction of the second base body. A locking structure is movably mounted on the connecting rod. When the first seat and the second seat are in a docking state, the locking structure is driven to lock or separate from the locking block. When the locking structure and the locking block are locked together, the movable handle and the connecting rod are collinear.

2. The folding self-locking structure for the vertical tube of a folding bicycle according to claim 1, characterized in that, The locking structure includes: A locking component, wherein the locking component is slidably connected to the connecting rod along the axis of the connecting rod, and one end of the locking component is formed with a groove that engages with the locking block; An elastic element is fitted onto the connecting rod and abuts against the end of the locking element opposite to the slot, providing an elastic thrust toward the slot.

3. The folding self-locking structure for the vertical tube of a folding bicycle according to claim 2, characterized in that, A protrusion is formed on the circumferential surface of the locking member, the slot is formed on the end face of the protrusion, and a guide slope is also formed on the end face of the protrusion where the slot is formed.

4. The folding self-locking structure for the vertical tube of a folding bicycle according to claim 2, characterized in that, A driving portion is also formed on the circumferential surface of the locking member, and the driving portion extends along the radial direction of the locking member.

5. The folding self-locking structure for the vertical tube of a folding bicycle according to claim 1, characterized in that, The locking block includes a rod portion connected to the second base body and a block portion located at the upper end of the rod portion, wherein the diameter of the block portion is larger than the diameter of the rod portion.

6. The folding self-locking structure for the vertical tube of a folding bicycle according to claim 1, characterized in that, A first connecting seat is formed on the circumferential surface of the first seat, and one end of the movable handle is pivotally connected to the first connecting seat; a second connecting seat corresponding to the first connecting seat is formed on the circumferential surface of the second seat, and one end of the connecting rod is pivotally connected to the second connecting seat.

7. The folding self-locking structure for the vertical tube of a folding bicycle according to claim 6, characterized in that, The movable handle has a receiving groove on the side wall facing the connecting rod that corresponds to the second connecting seat and the connecting rod, and the end of the movable handle away from the first seat is defined as the pulling end.

8. The folding self-locking structure for the vertical tube of a folding bicycle according to claim 6, characterized in that, Along the axial direction of the second seat, the locking block is formed on the side of the second connecting seat away from the first seat, and the size of the locking block protruding radially along the second seat is smaller than the size of the second connecting seat protruding radially along the second seat.

9. The folding self-locking structure for the vertical tube of a folding bicycle according to claim 5, characterized in that, The locking block is formed by bolts threaded onto the second base.

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