Folding device for bicycle and electric bicycle

Abstract

The utility model provides a folder for a bicycle and an electric bicycle, the folder comprises an upper tube and a lower tube, and the upper tube is pivotally connected with the lower tube; the switch assembly is connected between the upper pipe and the lower pipe in an opening and closing mode, when the switch assembly is opened, the upper pipe and the lower pipe can rotate relatively, and the folder is allowed to be switched between an unfolded state and a folded state; when the switch assembly is closed, the relative positions of the upper pipe and the lower pipe are fixed so as to keep the stability of the folder; the electronic switch can be triggered when the switch assembly is closed, when the electronic switch is triggered, the electronic switch controls a whole-vehicle circuit of the bicycle to be conducted, and when the electronic switch is released from triggering, the electronic switch controls the whole-vehicle circuit of the electric bicycle to be in a protection state.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle equipment, in particular to a folding device for a bicycle and an electric bicycle. Background Art

[0002] A folding bicycle is a portable and flexible means of transportation. It can be easily folded into a smaller size when needed, facilitating carrying and storage. A folding bicycle generally consists of components such as a folding frame, folding wheels, and a foldable handlebar. These designs enable the bicycle to be conveniently placed in the trunk of a vehicle, public transportation, or a narrow space such as an office when not in use.

[0003] With the development of technology, electric bicycles and electric folding bicycles are becoming increasingly popular. Currently, the main function of the folding device of an electric bicycle in the prior art is to firmly fix the upper tube (upper frame) and the lower tube (lower frame) together, thereby realizing the folding and unfolding of the whole vehicle. The folding device of the prior art also has the following defects in at least one aspect: First, most of the folding devices of electric bicycles in the prior art use a semi-automatic operation or a pure manual method for locking. The folding device with this structure is old-fashioned and the operation is very inconvenient, and a large amount of time is required each time it is opened and closed; Second, the stability and usability of the folding device of an electric bicycle in the prior art with a simple structure are too poor, and the manufacturing cost of the folding device with a complex structure is too high, which is not suitable for most models; Third, for the normal use state of an electric bicycle, it needs to be powered on and run, and in the folded state, it also needs to be in a power-off state. However, the power-on and power-off of the electric bicycle in the prior art need to be controlled and operated by a controller. Once forgetting to turn off the power, it is easy to accidentally touch the switch in the folded state, resulting in damage or influence. That is to say, it is very difficult for the folding device of an electric bicycle in the prior art to achieve start-up safety protection in the folded state, thus there are safety hazards. Summary of the Utility Model

[0004] One main advantage of the present utility model is to provide a folding device for a bicycle and an electric bicycle, wherein the folding device includes an electronic switch for controlling the switch of the electric bicycle. When the electronic switch remains closed, the electric bicycle cannot be started, so as to avoid safety hazards.

[0005] Another advantage of the present utility model is to provide a folding device for a bicycle and an electric bicycle, wherein when the folding device is locked, the electronic switch is triggered, and the electric bicycle can be started. When the folding device is opened, the electronic switch remains closed, thereby controlling the start-up state of the electric bicycle through the folding device.

[0006] Another advantage of the present invention is that it provides a folding device for bicycles and an electric bicycle, wherein the electronic switch is linked to the folding device control switch, and when the folding device is in a locked state, the electronic switch is triggered by the control switch, thereby avoiding accidental touch due to operating errors and improving the reliability of use.

[0007] Another advantage of the present invention is that it provides a folding device for bicycles and an electric bicycle, wherein when the locking buckle is not in place, resulting in the handle and the contacts of the electronic switch not touching each other normally, the entire vehicle circuit will be in a protection state, so as to ensure the safety of the user and the customer cannot start the vehicle.

[0008] According to one aspect of the present invention, a folding device for a bicycle of the present invention that can achieve the above-mentioned purpose and other purposes and advantages includes:

[0009] top tube;

[0010] a lower tube, the upper tube and the lower tube being pivotally connected;

[0011] a switch assembly, wherein the switch assembly is openably connected between the upper tube and the lower tube; when the switch assembly is turned on, the upper tube and the lower tube can rotate relative to each other, allowing the folder to switch between an unfolded state and a folded state; when the switch assembly is closed, the relative positions of the upper tube and the lower tube are fixed to maintain the stability of the folder; and

[0012] An electronic switch, wherein the electronic switch can be triggered when the switch component is closed, and when the electronic switch is triggered, the electronic switch controls the entire vehicle circuit of the bicycle to be turned on, and when the electronic switch is de-triggered, the electronic switch controls the entire vehicle circuit of the electric bicycle to be in a protection state.

[0013] According to an embodiment of the utility model, the electronic switch is arranged on the upper tube, the lower tube or the switch assembly, and the switch assembly contacts the electronic switch when it is closed, and keeps the electronic switch in the triggered state.

[0014] According to one embodiment of the utility model, the electronic switch is arranged on the lower tube, wherein the electronic switch comprises an electronic switch body and contacts for triggering the electronic switch body, wherein the electronic switch body is arranged on the tube body of the lower tube, and the contacts at least partially protrude outside the tube body of the lower tube.

[0015] According to an embodiment of the present utility model, the upper tube includes an upper tube body and an upper tube seat integrally extending from the upper tube body, and the lower tube includes a lower tube body and a lower tube seat integrally extending from the lower tube body. The upper tube seat and the lower tube seat are pivotally connected, and the switch assembly is connected to the lower tube seat of the upper tube and the lower tube seat of the lower tube. When the switch assembly is in the closed state, the switch assembly locks the upper tube seat of the upper tube and the lower tube seat of the lower tube, and the upper tube is locked in the relative position of the lower tube; when the switch assembly is in the open state, the upper tube seat and the lower tube seat can rotate relative to each other, so that the folder can be switched between the folded state and the open state.

[0016] According to an embodiment of the present utility model, the upper tube seat includes an upper tube connection end and an upper tube rotation end, where the upper tube connection end and the upper tube rotation end are located on two opposite sides of the upper tube body; the lower tube seat of the lower tube includes a lower tube connection end and a lower tube rotation end, where the lower tube connection end and the lower tube rotation end are located on two opposite sides of the lower tube body.

[0017] According to an embodiment of the present utility model, the upper tube rotation end of the upper tube is connected to the switch assembly, and the switch assembly is openably connected to the lower tube body of the lower tube. The switch assembly triggers the electronic switch by contacting the contact of the electronic switch.

[0018] According to an embodiment of the present utility model, the switch assembly includes a switch handle and a locking member disposed on the switch handle. The lower tube body of the lower tube includes a lower tube body main body and a locking hook disposed on the lower tube body main body. The position of the locking hook corresponds to the locking member of the switch assembly. When the switch assembly is closed, the locking member is engaged with the locking hook of the lower tube.

[0019] According to an embodiment of the present utility model, it further includes a connecting rod, where the connecting rod is pivotally connected to the lower tube rotation end of the lower tube and the second connection end of the switch handle. The connecting rod, the upper tube, the lower tube, and the switch handle of the switch assembly form a four-bar linkage structure.

[0020] According to an embodiment of the present utility model, the lower tube is further provided with a lower tube groove, where the contact of the electronic switch protrudes in the lower tube groove. The switch assembly further includes a convex point, where the convex point is disposed on the switch handle and its position corresponds to the position of the contact.

[0021] According to an embodiment of the present utility model, the switch handle includes a handle connecting rod and an operating handle, wherein the operating handle is located on one side of the handle connecting rod.

[0022] According to an embodiment of the present utility model, after the electronic switch is triggered, the locking member of the switch assembly is engaged with the locking hook, and the contact point is pressed by the bump to keep the electronic switch in the triggered state.

[0023] According to another aspect of the present application, the present application further provides an electric bicycle, including a frame body, a vehicle circuit, and a folding device disposed on the frame body, wherein the folding device is disposed on the frame body and is electrically connected to the vehicle circuit, and the switch of the vehicle circuit is controlled by the electronic switch of the folding device.

[0024] Through the understanding of the subsequent description and the drawings, the further objects and advantages of the present utility model will be fully embodied.

[0025] These and other objects, features, and advantages of the present utility model are fully embodied by the following detailed description and the drawings. Description of the Drawings

[0026] Figure 1 is a schematic diagram of the overall structure of the folding device according to the first preferred embodiment of the present utility model.

[0027] Figure 2A is a schematic diagram of the folding device in the open state according to the first preferred embodiment of the present utility model described above.

[0028] Figure 2B is a schematic diagram of the folding device in the locked state according to the first preferred embodiment of the present utility model described above.

[0029] Figure 3 is an exploded schematic diagram of the folding device according to the first preferred embodiment of the present utility model described above.

[0030] Figure 4 is a cross-sectional view of a partial structure of the folding device according to the first preferred embodiment of the present utility model described above. Detailed Description of the Embodiment

[0031] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description can be applied to other embodiments, variations, improvements, equivalent solutions, and other technical solutions that do not depart from the spirit and scope of the present utility model.

[0032] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0033] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0034] Referring to the drawings of this application specification Figures 1 to 3 As shown, a bicycle folding device and an electric bicycle according to the first preferred embodiment of the present application are explained in the following description. The folding device includes an upper tube 10, a lower tube 20, a switch assembly 30 and an electronic switch 40, wherein the upper tube 10 and the lower tube 20 are pivotally connected, and the switch assembly 30 is openably connected between the upper tube 10 and the lower tube 20. When the switch assembly 30 is turned on (i.e., the folding device is unlocked), the upper tube 10 and the lower tube 20 can rotate relative to each other, allowing the folding device to switch between an unfolded state and a folded state; when the switch assembly 30 is closed (i.e., the folding device is locked), the relative positions of the upper tube 10 and the lower tube 20 are fixed to maintain the stability of the folding device. The electronic switch 40 is used to control the starting state of the electric bicycle, wherein the electronic switch 40 can be triggered when the switch assembly 30 is closed. When the electronic switch 40 is triggered, the electronic switch 40 controls the entire vehicle circuit of the electric bicycle to be turned on, that is, the entire electric bicycle is powered on. When the electronic switch 40 is de-triggered, the electronic switch 40 controls the entire vehicle circuit of the electric bicycle to be in a protection state, and the vehicle cannot be started to protect the safety of the user.

[0035] The electronic switch 40 is arranged on the upper tube 10, the lower tube 20 or the switch assembly 30, and contacts the switch assembly 30 when triggered, that is, when the switch assembly 30 is closed, it contacts the electronic switch 40 and keeps the electronic switch 40 in the triggered state.

[0036] As an example, in a specific example of the present application, the electronic switch 40 is disposed on the lower tube 20. The electronic switch 40 includes an electronic switch body 41 and a contact 42 for triggering the electronic switch body 41. The electronic switch body 41 is disposed on the tube body of the lower tube 20, and at least a part of the contact 42 protrudes outside the tube body of the lower tube 20. When the switch assembly 30 is adjusted to the closed state, the switch assembly 30 contacts and triggers the contact 42 of the electronic switch 40, thereby causing the electronic switch 40 to be in a triggered state. When the switch assembly 30 is adjusted to the open state, the switch assembly 30 separates from the contact 42 of the electronic switch 40, and the triggered state of the electronic switch 40 is released.

[0037] It can be understood that, in another alternative embodiment of the present application, the electronic switch 40 is disposed on the upper tube 10 or the electronic switch 40 is connected to the switch assembly 30. When the switch assembly 30 is in the closed state, the switch assembly 30 triggers the contact 42 of the electronic switch 40 or the contact 42 of the electronic switch 40 is triggered as the switch assembly 30 moves; when the switch assembly 30 is opened, the switch assembly 30 separates from the contact 42 of the electronic switch 40, or the contact 42 of the electronic switch 40 is released from the triggered state as the switch assembly 30 moves.

[0038] As Figure 2A and Figure 2B As shown, the upper tube 10 of the folder includes an upper tube body 11 and an upper tube seat 12 integrally extending from the upper tube body 11. The lower tube 20 includes a lower tube body 21 and a lower tube seat 22 integrally extending from the lower tube body 21. The upper tube seat 12 and the lower tube seat 22 are pivotally connected, and the switch assembly 30 is connected to the lower tube seat 12 of the upper tube 10 and the lower tube seat 22 of the lower tube 20. When the switch assembly 30 is in the closed state, the switch assembly 30 locks the upper tube seat 12 of the upper tube 10 and the lower tube seat 22 of the lower tube 20, and the upper tube 10 is locked in the relative position of the lower tube 20; when the switch assembly 30 is in the open state, the upper tube seat 12 and the lower tube seat 22 can rotate relative to each other, so that the folder can be switched between the folded state and the open state.

[0039] In a specific example of the present application, the electronic switch 40 is disposed on the lower tube body 21 of the lower tube 20. The lower tube 20 is provided with a receiving cavity 210 for receiving the electronic switch 40, and the electronic switch 40 is hermetically disposed in the receiving cavity 210 of the lower tube 20.

[0040] The upper tube seat 12 of the upper tube 10 includes an upper tube connection end 121 and an upper tube rotation end 122. The upper tube connection end 121 and the upper tube rotation end 122 are located on two opposite sides of the upper tube body 21, that is, the upper tube connection end 121 and the upper tube rotation end 122 are arranged back to back at the end of the upper tube body 21. The lower tube seat 12 of the lower tube 20 includes a lower tube connection end 221 and a lower tube rotation end 222. The lower tube connection end 221 and the lower tube rotation end 222 are located on two opposite sides of the lower tube body 21, that is, the lower tube connection end 221 and the lower tube rotation end 222 are arranged back to back at the end of the lower tube body 21. The upper tube connection end 121 of the upper tube 10 is pivotally connected to the lower tube connection end 221 of the lower tube 20. When the switch assembly 30 is in the open state, the upper tube rotation end 122 of the upper tube 10 and the lower tube rotation end 222 of the lower tube 20 can rotate around the upper tube connection end 121 and the lower tube connection end 122, so as to switch between the open state and the folded state.

[0041] The upper tube rotation end 122 of the upper tube 10 is connected to the switch assembly 30, and the switch assembly 30 is connected to the lower tube body 22 of the lower tube 20 in an openable and closable manner. When the switch assembly 30 is in the locked state, the switch assembly 30 fixes the upper tube 10 at the corresponding position above the lower tube 20, and the switch assembly 30 triggers the electronic switch 40 by abutting against the contact 42 of the electronic switch 40.

[0042] The switch assembly 30 includes a switch handle 31 and a locking member 32 disposed on the switch handle 31. The lower tube body 21 of the lower tube 20 includes a lower tube body main body 211 and a locking hook 212 disposed on the lower tube body main body 211. The position of the locking hook 212 corresponds to the locking member 32 of the switch assembly 30. When the switch assembly 30 is closed, the locking member 32 is engaged with the locking hook 212 of the lower tube 20.

[0043] One end of the switch handle 31 of the switch assembly 30 is connected to the upper tube rotation end 122 of the upper tube 10. The locking member 32 of the switch assembly 30 is movably disposed at the other end of the switch handle 31, and the switch handle 31 is engaged with the lower tube 20 by the locking member 32.

[0044] In this preferred embodiment of the present application, the folder further includes a connection assembly 50, where the connection assembly 50 is used to connect the upper tube 10, the lower tube 20, and the switch assembly 30, and allows relative rotation between the upper tube 10, the lower tube 20, and the switch assembly 30. The connection assembly 50 includes a first connecting rod 51 and a second connecting rod 52. The first connecting rod 51 is disposed between the upper tube connection end 121 of the upper tube 10 and the lower tube connection end 221 of the lower tube 20, and the second connecting rod 52 is disposed between the upper tube rotation end 122 of the upper tube 10 and the switch handle 31 of the switch assembly 30.

[0045] The switch handle 31 includes a first connection end 311 and a second connection end 312 integrally extending from the first connection end 311. The first connection end 311 is connected to the upper tube rotation end 122 of the upper tube 10 through the second connecting rod 52, and the locking member 32 of the switch assembly 30 is pivotally disposed at the second connection end 312 of the switch handle 31.

[0046] The folder further includes a connecting rod 60, where the connecting rod 60 is pivotally connected to the lower tube rotation end 222 of the lower tube 20 and the second connection end 312 of the switch handle. The connecting rod 60, the upper tube 10, the lower tube 20, and the switch handle 31 of the switch assembly 30 form a four-bar linkage structure. When the switch assembly 30 is in the open state, that is, when the locking member 32 is disengaged from the locking hook 212, the switch handle 31 and the connecting rod 60 are connected and flipped outwards, allowing the upper tube 10 and the lower tube 20 to be folded.

[0047] It can be understood that the four-bar linkage structure formed by the folder allows the user to only need one opening action to switch the folder from the open state to the folded state when the switch assembly 30 is opened, and only need one action to rotate from the folded state to the open state.

[0048] The connecting rod 60 further includes a connecting rod unit 61 and a connecting rod connector 62 connecting the connecting rod unit 61. The connecting rod connector 62 is disposed at the end of the connecting rod unit 61, and the connecting rod unit 61 is pivotally connected between the switch handle 31 and the lower tube rotation end 222 of the lower tube 20 through the connecting rod connector 62.

[0049] The connecting rod unit 61 is provided with adjustable threads. Through the adjustable threads, the connection length between the connecting rod unit 61 and the connecting rod connector 62 can be adjusted, thereby adjusting the tightness when the switch assembly 30 is switched.

[0050] Specifically, the unlocking process of the folder is as follows: Press the locking part 32 of the switch assembly 30 to disengage the locking part 32 from the locking hook 212; then lift or turn outwards the switch handle 31 of the switch assembly 30. At this time, the connecting rod 60 rotates outwards synchronously with the switch handle 31. At this moment, the upper tube 10 is driven by the switch handle 31 to rotate along the first connecting rod 51, so that the upper tube 10 and the lower tube 20 are folded forward and backward or left and right.

[0051] The locking process of the folder is as follows: Rotate the upper tube 10 and the lower tube 20 relatively so that the upper tube 10 and the lower tube 20 are stacked up and down. At this time, the switch handle 31 of the switch assembly 30 moves to the corresponding position of the lower tube 20 along with the upper tube 10, and the connecting rod 60 rotates into the tube groove of the lower tube 20 along with the switch handle 31 of the switch assembly 30; Press the switch handle 31 so that the locking part 32 of the switch assembly 30 and the locking hook 212 are buckled together.

[0052] In this preferred embodiment of the present application, the lower tube 20 is further provided with a lower tube groove 201, wherein the contact 42 of the electronic switch 40 protrudes in the lower tube groove 201. The switch assembly 30 further includes a bump 33, which is arranged on the switch handle 31 and its position corresponds to the position of the contact 42. When the switch handle 31 is pushed towards the lower tube groove 201 of the lower tube 20, the bump 33 on the switch handle 31 touches and pushes the contact 42 of the electronic switch 40, so as to trigger the electronic switch body 41 of the electronic switch 40.

[0053] The lower tube rotating end 222 of the lower tube 20 further includes at least two lower tube support arms 2221, and a receiving groove 2222 for receiving the connecting rod 60 is formed between the lower tube support arms 2221. The connecting rod 60 can be turned over in the receiving groove 2222, and the connecting rod 60 is connected and supported by the lower tube support wall 2221.

[0054] When pressing the switch handle 31, the locking part 32 of the switch assembly 30 and the locking hook 212 are buckled together, and the bump 33 on the switch handle 31 triggers the electronic switch 40.

[0055] The switch handle 31 of the switch assembly 30 includes a handle connecting rod 313 and an operating handle 314. The operating handle 314 is located on one side of the handle connecting rod 313, and the user can open or close the switch assembly 30 through the operating handle 314.

[0056] The switch assembly 30 further includes a reset member 34, wherein the reset member 34 is disposed on the switch handle 31 and is connected to the lock member 32 to provide a force required for resetting the lock member 32. As an example, in this preferred embodiment of the present application, the reset member 34 may be, but is not limited to, an elastic element such as a spring or a torsion spring.

[0057] After the electronic switch 40 is triggered, the electronic switch body 41 generates an electrical signal and feeds it back to the whole circuit of the electric bicycle. The vehicle can only be started when the whole circuit of the electric bicycle receives the electrical signal. The contact 42 of the electronic switch 40 has a contact position and a trigger position. When the contact 42 is contacted by the convex point 33 of the switch assembly 30 at the contact position, the contact 42 has not reached the effective trigger position, and the convex point 33 needs to contact the contact 42 and move it to the effective trigger position to trigger the electronic switch 40.

[0058] It is understandable that when the contact 42 is contacted by the protrusion 33, it cannot be guaranteed that the locking member 32 of the switch assembly 30 and the locking hook 212 are engaged with each other, that is, it cannot be guaranteed that the folder is in a stable locked state. Once the vehicle is powered on, it is easy to cause an accidental touch.

[0059] Therefore, in the preferred embodiment of the present application, the contact 42 has a trigger stroke between the contact position and the trigger position, and the electronic switch 40 can be triggered only when the contact 42 is moved from the contact position to the trigger position by the protrusion 33.

[0060] It is worth mentioning that when the switch handle 31 of the switch assembly 30 is pushed to close, the protrusion 33 located at the switch handle 31 contacts the contact 42 from the contact position, and when it moves from the contact position to the trigger position, the contact 42 generates and sends an electrical signal. When the electronic switch 40 is triggered, the lock member 32 of the switch assembly 30 is engaged with the lock hook 212, and the contact 42 is supported by the protrusion 33 to keep the electronic switch 40 in a triggered state. When the contact 42 is not reached to the trigger position by the protrusion 33, that is, when the electronic switch is not triggered, the lock member 32 and the lock hook 212 are not engaged with each other. At this time, the electronic switch 40 is not triggered, and the vehicle circuit is in a protected state. The lock member 32 of the folder needs to be fully engaged with the lock hook 212 to ensure that the electronic switch 40 is triggered, that is, the vehicle is started.

[0061] According to another aspect of the present application, the present application further provides an electric bicycle, wherein the electric bicycle includes a frame body, a vehicle circuit, and a folding device disposed on the frame body. The folding device is disposed on the frame body and is electrically connected to the vehicle circuit, and the on / off of the vehicle circuit is controlled by the electronic switch 40 of the folding device. When the folding device is in the folded state, the electronic switch 40 is not triggered, and at this time, the vehicle circuit is in a protected state and the vehicle cannot be started; when the folding device is opened, the electronic switch 40 is triggered, and an electrical signal is generated by the electronic switch 40 and transmitted to the vehicle circuit. At this time, the vehicle circuit is turned on and the vehicle is allowed to start.

[0062] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only examples and do not limit the present invention. The object of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and described in the embodiments, and without departing from the said principles, the embodiments of the present invention can have any deformation or modification.

Claims

1. A folding device for a bicycle, characterized in that: include: top tube; a lower tube, the upper tube and the lower tube being pivotally connected; A switch assembly, wherein the switch assembly is openably connected between the upper tube and the lower tube. When the switch assembly is turned on, the upper tube and the lower tube can rotate relative to each other, allowing the folder to switch between an unfolded state and a folded state; when the switch assembly is turned off, the relative positions of the upper tube and the lower tube are fixed to maintain the stability of the folder; as well as An electronic switch, wherein the electronic switch can be triggered when the switch component is closed, and when the electronic switch is triggered, the electronic switch controls the entire vehicle circuit of the bicycle to be turned on, and when the electronic switch is de-triggered, the electronic switch controls the entire vehicle circuit of the electric bicycle to be in a protection state.

2. The folder according to claim 1, wherein the electronic switch is arranged on the upper tube, the lower tube or the switch assembly, and when the switch assembly is closed, it contacts the electronic switch and keeps the electronic switch in a triggered state.

3. The folder according to claim 1, wherein the electronic switch is arranged on the lower tube, wherein the electronic switch comprises an electronic switch body and a contact for triggering the electronic switch body, wherein the electronic switch body is arranged on the tube body of the lower tube, and the contact at least partially protrudes outside the tube body of the lower tube.

4. The folder according to claim 3, wherein the upper tube includes an upper tube body and an upper tube seat extending integrally from the upper tube body, and the lower tube includes a lower tube body and a lower tube seat extending integrally from the lower tube body, wherein the upper tube seat is pivotally connected to the lower tube seat, and the switch assembly is connected to the lower tube seat of the upper tube and the lower tube seat of the lower tube, and when the switch assembly is in a closed state, the switch assembly locks the upper tube seat of the upper tube and the lower tube seat of the lower tube, and the upper tube is locked in the relative position of the lower tube; when the switch assembly is in an open state, the upper tube seat and the lower tube seat can rotate relative to each other, so that the folder can switch between the folded state and the open state.

5. The folder according to claim 4, wherein the upper tube seat comprises an upper tube connecting end and an upper tube rotating end, wherein the upper tube connecting end and the upper tube rotating end are located on two opposite sides of the upper tube body; the lower tube seat of the lower tube comprises a lower tube connecting end and a lower tube rotating end, wherein the lower tube connecting end and the lower tube rotating end are located on two opposite sides of the lower tube body.

6. The folder according to claim 5, wherein the upper tube rotating end of the upper tube is connected to the switch assembly, and the switch assembly is openably connected to the lower tube body of the lower tube, and the switch assembly triggers the electronic switch by abutting against the contacts of the electronic switch.

7. The folder according to claim 6, wherein the switch assembly comprises a switch handle and a locking piece arranged on the switch handle, wherein the lower tube body of the lower tube comprises a lower tube body main body and a locking hook arranged on the lower tube body main body, wherein the locking hook is located at a position corresponding to the locking piece of the switch assembly, and when the switch assembly is closed, the locking piece is engaged with the locking hook of the lower tube.

8. The folder according to claim 7 further comprises a connecting rod, wherein the connecting rod is pivotally connected to the lower tube rotating end of the lower tube and the switch handle, and the connecting rod, the upper tube, the lower tube and the switch handle of the switch assembly form a four-bar structure.

9. A folder according to claim 8, wherein the lower tube is further provided with a lower tube groove, wherein the contact of the electronic switch protrudes from the lower tube groove, and the switch assembly further includes a protrusion, wherein the protrusion is arranged on the switch handle, and its position corresponds to the position of the contact.

10. The folder according to claim 9, wherein the switch handle comprises a handle link and an operating handle, wherein the operating handle is located at one side of the handle link.

11. The folder according to claim 9, wherein when the electronic switch is triggered, the locking member of the switch assembly is engaged with the locking hook, and the contact is supported by the protrusion to keep the electronic switch in a triggered state.

12. An electric bicycle, characterized in that: It comprises a frame body, a vehicle circuit and a folder as described in any one of claims 1 to 11, wherein the folder is arranged on the frame body, wherein the folder is arranged on the frame body and is electrically connected to the vehicle circuit, and the switch of the vehicle circuit is controlled by the electronic switch of the folder.

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