Inclined tube folding mechanism and scooter

Abstract

The inclined tube folding mechanism comprises a frame, a vertical tube assembly, a first connecting rod, a second connecting rod and a locking assembly, the vertical tube assembly is connected with the frame between an unfolding position and a folding position in a pivoted mode, the first connecting rod is connected with the frame in a pivoted mode, the second connecting rod is connected with the vertical tube assembly in a pivoted mode, and the locking assembly is connected with the vertical tube assembly in a pivoted mode. The locking assembly is provided with a first pivot axis and a second pivot axis which are parallel to each other, the first connecting rod is pivotally connected with the locking assembly around the first pivot axis, the second connecting rod is pivotally connected with the locking assembly around the second pivot axis, and the frame, the vertical pipe assembly, the first connecting rod and the second connecting rod form a four-bar mechanism. The locking assembly is provided with a locking position and an unlocking position relative to the first connecting rod, and the locking assembly can be located at the locking position so that the four-connecting-rod mechanism can be tensioned conveniently. The inclined pipe folding mechanism has the advantages that shaking and noise are small when the vertical pipe assembly is in the unfolding position for use, and user experience is high.

Description

Technical Field

[0001] This utility model relates to the field of scooter technology, specifically to a slanted tube folding mechanism and a mobility scooter. Background Technology

[0002] In related technologies, foldable personal mobility vehicles such as folding electric bikes and folding scooters basically adopt a four-bar folding mechanism. However, since the links are pivotally connected by shaft-hole fittings, and clearance fittings are often used between the shaft-hole fittings for ease of assembly, the clearance between the shaft-hole fittings can easily lead to significant shaking and noise in the personal mobility vehicle. Especially after a certain period of use, the clearance between the shaft-hole fittings gradually increases due to wear, and the shaking and noise also intensify, seriously affecting the user experience and safety. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of this utility model propose an inclined tube folding mechanism, which has the advantages of low shaking and noise when the riser assembly is in the unfolded position, and high user experience.

[0005] An embodiment of this utility model also proposes a mobility scooter.

[0006] The inclined tube folding mechanism of this utility model embodiment includes a frame, a riser assembly, a first link, a second link, and a locking assembly. The riser assembly is pivotally connected to the frame between an unfolded position and a folded position. The first link is pivotally connected to the frame. The second link is pivotally connected to the riser assembly. The locking assembly has a first pivot axis and a second pivot axis that are parallel to each other. The first link is pivotally connected to the locking assembly around the first pivot axis, and the second link is pivotally connected to the locking assembly around the second pivot axis. The frame, the riser assembly, the first link, and the second link constitute a four-bar linkage with a dead point position. The locking assembly has a locked position and an unlocked position relative to the first link. When the riser assembly is in the unfolded position, the locking assembly can be in the locked position to tension the four-bar linkage.

[0007] According to the slanted tube folding mechanism of this utility model embodiment, in the four-bar linkage consisting of the frame, the seat tube assembly, the first link, and the second link, the seat tube assembly has an unfolded position and a folded position relative to the frame. When the seat tube assembly is in the unfolded position, the locking assembly is driven to rotate relative to the first link around the first pivot axis to the locking position, thereby driving the second link to rotate relative to the locking assembly and the seat tube assembly, thereby achieving tension on the first link and the second link. This eliminates the gap between the central shaft holes of the four-bar linkage. During riding, the slanted tube folding mechanism is less prone to shaking, generates less noise, and provides a higher level of user riding experience and safety.

[0008] In some embodiments, when the riser assembly is in the unfolded position and the locking assembly is in the locked position, the angle between the plane containing the two pivot axes of the first link and the plane containing the two pivot axes of the second link is 0.1°-1°.

[0009] In some embodiments, the inclined tube folding mechanism further includes a fastener connected to the riser assembly, and the locking assembly is detachably connected to the fastener when in the locked position.

[0010] In some embodiments, the inclined tube folding mechanism further includes a limiting member connected to the riser assembly. When the riser assembly is in the unfolded position, the limiting member abuts against the first connecting rod to prevent the riser assembly from continuing to pivot in a direction away from the folding position.

[0011] In some embodiments, the locking assembly includes an eccentric shaft and a locking wrench. The eccentric shaft has an eccentric hole. The central axis of the eccentric shaft is collinear with the first pivot axis. The central axis of the eccentric hole is collinear with the second pivot axis. The locking wrench is connected to the eccentric shaft. The length direction of the locking wrench is at an angle to the axial direction of the eccentric shaft.

[0012] The first connecting rod is provided with a first mounting hole, and the eccentric shaft is pivotally fitted in the first mounting hole. The second connecting rod is connected with a first rotating shaft, and the first rotating shaft is pivotally fitted in the eccentric hole.

[0013] In some embodiments, the slanted tube folding mechanism further includes a tension spring connecting the locking wrench and the first linkage, the tension spring pressing the locking wrench toward the locking position.

[0014] In some embodiments, the riser assembly includes a riser, a clamp, and a slant tube connected in sequence. The slant tube is pivotally connected to the frame, and the second connecting rod is pivotally connected to the clamp. The slant tube is provided with a receiving groove, the width direction of which is consistent with the axial direction of the eccentric shaft. At least a portion of the first connecting rod and at least a portion of the second connecting rod are located within the receiving groove.

[0015] In some embodiments, the inclined tube includes two first side plates spaced axially along the eccentric axis, with the receiving groove formed around the two first side plates, a first end of each of the two first side plates being connected to the tube clamp, and a second end of each of the two first side plates being pivotally connected to the frame.

[0016] In some embodiments, the fastener includes a knob pin that is threadedly connected to the first side plate, the pin portion of the knob pin being located in the receiving groove, and a limiting groove on the side of the locking wrench opposite to the axial direction of the eccentric shaft. When the locking assembly is in the locking position, the pin of the knob pin engages in the limiting groove.

[0017] In some embodiments, the first link includes two second side plates spaced apart along the eccentric shaft;

[0018] The two second side plates are provided with the first mounting holes on their opposite sides. There are two eccentric shafts, which are pivotally fitted into the two first mounting holes respectively. Both eccentric shafts are connected to the locking wrench.

[0019] The two second side plates have through holes on their opposite sides that communicate with the first mounting hole. The part of the second connecting rod that is connected to the first rotating shaft is located between the two second side plates. The two ends of the first rotating shaft pass through the two through holes and are pivotally fitted into the two eccentric holes respectively.

[0020] The mobility scooter according to an embodiment of the present invention includes a slanted tube folding mechanism as described in any of the above embodiments.

[0021] The technical advantages of the mobility scooter according to the present invention are the same as those of the inclined tube folding mechanism in the above embodiments, and will not be repeated here. Attached Figure Description

[0022] Figure 1 This is an exploded view of the inclined tube folding mechanism according to an embodiment of the present utility model.

[0023] Figure 2 This is a schematic diagram of the inclined tube folding mechanism according to an embodiment of the present utility model, wherein the riser assembly is located in the unfolded position.

[0024] Figure 3 yes Figure 2 A magnified view of a portion of the image, in which a first side panel is hidden.

[0025] Figure 4 yes Figure 3 A magnified view of a portion of the image.

[0026] Figure 5 This is another schematic diagram of the inclined tube folding mechanism according to an embodiment of the present utility model, wherein a first side plate is hidden.

[0027] Figure 6 This is an exploded view of the inclined tube folding mechanism according to an embodiment of the present utility model, wherein the riser assembly is located in the folding position.

[0028] Figure label:

[0029] 1. Frame; 2. Steer tube assembly; 21. Steer tube; 22. Tube clamp; 23. Diagonal tube; 231. First side plate; 3. First connecting rod; 31. Second side plate; 4. Second connecting rod; 5. Eccentric shaft; 6. Locking wrench; 61. Limiting groove; 7. Limiting component; 8. Tension spring; 9. Knob pull pin; 10. First bushing; 110. Second bushing; 120. Third bushing. Detailed Implementation

[0030] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] The following is combined with Figures 1-6 This invention describes a folding mechanism for inclined tubes according to an embodiment of the present invention.

[0032] The inclined tube folding mechanism of this utility model embodiment includes a frame 1, a riser assembly 2, a first link 3, a second link 4, and a locking assembly. The riser assembly 2 is pivotally connected to the frame 1 between the unfolded position and the folded position. The first link 3 is pivotally connected to the frame 1. The second link 4 is pivotally connected to the riser assembly 2. The locking assembly has a first pivot axis and a second pivot axis that are parallel to each other. The first link 3 is pivotally connected to the locking assembly around the first pivot axis, and the second link 4 is pivotally connected to the locking assembly around the second pivot axis. The frame 1, the riser assembly 2, the first link 3, and the second link 4 constitute a four-bar linkage with a dead point position. The locking assembly has a locked position and an unlocked position relative to the first link 3. When the riser assembly 2 is in the unfolded position, the locking assembly can be in the locked position to tension the four-bar linkage.

[0033] According to the slanted tube folding mechanism of this utility model embodiment, in the four-bar linkage consisting of the frame 1, the stem assembly 2, the first link 3, and the second link 4, the stem assembly 2 has an unfolded position and a folded position relative to the frame 1. When the stem assembly 2 is in the unfolded position, the locking assembly is driven to rotate relative to the first link 3 around the first pivot axis to the locking position, thereby driving the second link 4 to rotate relative to the locking assembly and the stem assembly 2, thereby achieving tension on the first link 3 and the second link 4. This eliminates the gap between the central shaft holes of the four-bar linkage mechanism. During riding, the slanted tube folding mechanism is less prone to shaking, generates less noise, and provides a higher user riding experience and safety.

[0034] It should be noted that when the riser assembly 2 is in the extended position, the four-bar linkage is at or near the dead center, thus achieving self-locking and increasing the reliability of the riser assembly 2 in the extended position. At this time, the locking assembly can be fixedly connected to any component of the four-bar linkage to maintain it in the locked position, further preventing the riser assembly 2 from accidentally disengaging from the extended position.

[0035] In some embodiments, such as Figure 2 As shown, when the riser assembly 2 is in the unfolded position and the locking assembly is in the locked position, the angle between the plane containing the two pivot axes of the first link 3 and the plane containing the two pivot axes of the second link 4 is 0.1°-1°.

[0036] At this point, the four-bar linkage consisting of frame 1, seat tube assembly 2, first link 3, and second link 4 is closer to the dead center position. When not subjected to external force, the seat tube assembly 2 is less likely to rotate relative to frame 1 and disengage from the unfolded position under the support of first link 3 and second link 4, thus improving the user's riding safety.

[0037] Specifically, the angle between the plane containing the two pivot axes of the first link 3 and the plane containing the two pivot axes of the second link 4 can be 0.1°, 0.5°, and 1°.

[0038] In some embodiments, the inclined tube folding mechanism further includes a fastener connected to the riser assembly 2, and the locking assembly is detachably connected to the fastener when in the locked position.

[0039] Fasteners ensure that the locking assembly is reliably maintained in the locked position, thereby locking the four-bar linkage. This not only eliminates the gap between the central shaft holes of the four-bar linkage, but also achieves secondary locking of the upright tube assembly 2 in the unfolded position. The mobility scooter using the inclined tube folding mechanism of this embodiment has higher riding safety.

[0040] In some embodiments, such as Figures 3-5As shown, the inclined tube folding mechanism also includes a limiting member 7, which is connected to the riser assembly 2. When the riser assembly 2 is in the unfolded position, the limiting member 7 abuts against the first connecting rod 3 to prevent the riser assembly 2 from continuing to pivot in a direction away from the folding position.

[0041] In other words, when the riser assembly 2 pivots relative to the frame 1 from the folded position to the unfolded position, the first link 3 also rotates relative to the frame 1 until the first link 3 abuts against the limiting member 7 and can no longer rotate relative to the frame 1. This indicates that the riser assembly 2 has reached the unfolded position, making the position switching of the riser assembly 2 convenient and reliable. Moreover, the limiting member 7 ensures that when the riser assembly 2 reaches the unfolded position, the four-bar linkage is about to reach the dead point but has not yet reached the dead point, making the switching of the riser assembly 2 to the folded position even easier.

[0042] Specifically, the limiting member 7 is a limiting shaft extending along the width direction of the frame 1, and the limiting shaft is installed in the positioning hole on the inclined tube 23 in the riser assembly 2.

[0043] In some embodiments, such as Figure 1 , Figures 3-5 As shown, the locking assembly includes an eccentric shaft 5 and a locking wrench 6. The eccentric shaft 5 has an eccentric hole, and the central axis of the eccentric shaft 5 is collinear with the first pivot axis. The central axis of the eccentric hole is collinear with the second pivot axis. The locking wrench 6 is connected to the eccentric shaft 5, and the length direction of the locking wrench 6 is at an angle to the axial direction of the eccentric shaft 5. The first connecting rod 3 has a first mounting hole, and the eccentric shaft 5 can pivotally fit into the first mounting hole. The second connecting rod 4 is connected to a first rotating shaft, which can pivotally fit into the eccentric hole.

[0044] Compared to other linkage structures, the eccentric shaft 5, with its first and second pivot axes, has a simpler structure and is easier to pivotally connect with the first link 3 and the second link 4. The folding mechanism also boasts a more aesthetically pleasing appearance. Furthermore, the user can pivot the eccentric shaft 5 relative to the first link 3 by pressing the locking lever 6, making switching between the locked and unlocked positions of the eccentric shaft 5 much easier.

[0045] Specifically, such as Figure 1 and Figure 5As shown, the first connecting rod 3 includes two second side plates 31 arranged at intervals along the axial direction of the eccentric shaft 5. The two second side plates 31 have first mounting holes on their opposing sides. There are two eccentric shafts 5, each pivotally fitted into one of the two first mounting holes. The two second side plates 31 have through holes communicating with the first mounting holes on their opposite sides. The portion of the second connecting rod 4 connected to the first rotating shaft is located between the two second side plates 31. Both ends of the first rotating shaft pass through the two through holes and are pivotally fitted into the two eccentric holes. Each eccentric shaft 5 has a shaped shaft section protruding from the first mounting hole. The locking wrench 6 includes a U-shaped connecting portion that covers the portions of the two second side plates 31 with the first mounting holes. The two side plates arranged along the axial direction of the eccentric shaft 5 in the U-shaped connecting portion each have shaped holes, and the two shaped shaft sections fit into the two shaped holes, thereby connecting the locking wrench 6 to the two eccentric shafts 5.

[0046] In some embodiments, such as Figure 3 As shown, the inclined tube folding mechanism also includes a tension spring 8, which connects the locking wrench 6 and the first connecting rod 3. The tension spring 8 presses the locking wrench 6 toward the locking position.

[0047] Therefore, when the riser assembly 2 is in the folded position, the tension spring 8 and the handle locking wrench 6 are stably pressed against the first link 3 in the four-bar linkage, effectively preventing the folded mobility scooter from making noise due to the shaking of the locking wrench 6 during transportation, thus improving the user experience.

[0048] Specifically, the tension spring 8 is located between the two second side plates 31 in the first connecting rod 3. The second side plate 31 is provided with a positioning hole, and a connecting shaft is installed in the positioning hole. The lower end of the tension spring 8 is attached to the connecting shaft.

[0049] In some embodiments, the riser assembly 2 includes a riser 21, a pipe clamp 22 and an inclined pipe 23 connected in sequence. The inclined pipe 23 is pivotally connected to the frame 1, and the second connecting rod 4 is pivotally connected to the pipe clamp 22. The inclined pipe 23 is provided with a receiving groove, the width direction of which is consistent with the axial direction of the eccentric shaft 5. At least a portion of the first connecting rod 3 and at least a portion of the second connecting rod 4 are located in the receiving groove.

[0050] By hiding part of the first link 3 and the second link 4 in the receiving groove, the appearance of the mobility scooter at the four-link mechanism is improved, and external impurities such as sand and gravel are effectively prevented from adhering to the first link 3 and the second link 4, which would affect the reliability of the riser assembly 2 in switching between the unfolded and folded positions.

[0051] Specifically, such as Figure 2As shown, when the riser assembly 2 is in the unfolded position, the first connecting rod 3, the second connecting rod 4, and the eccentric shaft 5 are basically hidden in the receiving groove, and the locking wrench 6 covers the first connecting rod 3, thereby further ensuring the aesthetic appearance of the mobility scooter.

[0052] It should be noted that the front end of the frame 1 is provided with two connecting plates arranged at intervals along the width direction. Two second side plates 31 are pivotally connected between the two connecting plates via a pivot. Two second bushings 110 and a third bushing 120 are sleeved on the pivot. The second bushing 110 is located between the second side plate 31 and the connecting plate, and the third bushing 120 is located between the two second side plates 31. This arrangement effectively ensures the relative fixation of the second side plates 31 and the frame 1 in the width direction of the frame 1.

[0053] In some embodiments, such as Figures 1-6 As shown, the inclined tube 23 includes two first side plates 231 arranged axially at intervals along the eccentric shaft 5, with a shaped receiving groove surrounding the two first side plates 231. The first ends of the two first side plates 231 are connected to the tube clamp 22, and the second ends of the two first side plates 231 are pivotally connected to the frame 1.

[0054] Dividing the inclined tube 23 into two first side plates 231 results in a larger receiving groove, which facilitates the placement of the first connecting rod 3 and the second connecting rod 4. Simultaneously, it simplifies and facilitates the forming of the receiving groove, reducing the manufacturing cost of the inclined tube 23.

[0055] Specifically, such as Figure 1 As shown, the riser 21 is assembled in the mounting hole of the pipe clamp 22. The outer circumferential surface of the pipe clamp 22 is provided with two clamping plates arranged axially at intervals along the eccentric shaft 5. Two first side plates 231 are arranged parallel to each other and mirror symmetrically on both sides of the two clamping plates. The first side plates 231 are fixed to the two clamping plates by two connecting shafts. The upper end of the second connecting rod 4 is pivotally connected to the two clamping plates by one of the connecting shafts. The first connecting rod 3 is located between the two clamping plates. A first bushing 10 is sleeved on the connecting shaft between each clamping plate and the first connecting rod 3. The two first bushings 10 limit the first connecting rod 3 in the width direction of the frame 1.

[0056] In some embodiments, such as Figure 5 As shown, the fastener includes a knob pull pin 9, which is threadedly connected to the first side plate 231. The pin portion of the knob pull pin 9 is located in the receiving groove. The locking wrench 6 has a limit groove 61 on the side opposite to the axial direction of the eccentric shaft 5. When the locking assembly is in the locked position, the pin of the knob pull pin 9 engages in the limit groove 61.

[0057] The knob pull pin 9 is designed such that its pin protrudes from the receiving groove under the pressure of the elastic element. As the locking wrench 6 rotates towards the locking position, the edge of the locking wrench 6 first contacts the pin and forces it to retract into the body of the knob pull pin 9. When the locking wrench 6 reaches the locking position, the limiting groove 61 aligns with the pin, and the pin returns to its original position under the pressure of the elastic element, engaging within the limiting groove 61, thus locking the locking wrench 6. Simultaneously, applying a certain pulling force to the locking wrench 6 towards the unlocking position will disengage the pin from the limiting groove 61, unlocking the locking wrench 6. The two-stage locking operation of the mobility scooter is convenient and quick.

[0058] like Figure 2 As shown, the knob pull pin 9 is threaded onto the outside of the first side plate 231 located on the left side.

[0059] The mobility scooter according to an embodiment of the present invention includes a slanted tube folding mechanism as described in any of the above embodiments.

[0060] The technical advantages of the mobility scooter according to the present invention are the same as those of the inclined tube folding mechanism in the above embodiments, and will not be repeated here.

[0061] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0064] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0066] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A folding mechanism for inclined tubes, characterized in that, include: Frame; A riser assembly, which is pivotally connected to the frame between an extended position and a folded position; A first link, which is pivotally connected to the vehicle frame; The second link is pivotally connected to the riser assembly; A locking assembly having a first pivot axis and a second pivot axis parallel to each other, a first link pivotally connected to the locking assembly about the first pivot axis, and a second link pivotally connected to the locking assembly about the second pivot axis. The frame, the riser assembly, the first link, and the second link constitute a four-bar linkage with a dead center position. The locking assembly has a locked position and an unlocked position relative to the first link. When the riser assembly is in the unfolded position, the locking assembly can be in the locked position to tension the four-bar linkage.

2. The inclined tube folding mechanism according to claim 1, characterized in that, When the riser assembly is in the unfolded position and the locking assembly is in the locked position, the angle between the plane containing the two pivot axes of the first link and the plane containing the two pivot axes of the second link is 0.1°-1°.

3. The inclined tube folding mechanism according to claim 1 or 2, characterized in that, The inclined tube folding mechanism also includes a fastener connected to the riser assembly, and the locking assembly is detachably connected to the fastener when it is in the locking position.

4. The inclined tube folding mechanism according to claim 3, characterized in that, The inclined tube folding mechanism also includes a limiting member connected to the riser assembly. When the riser assembly is in the unfolded position, the limiting member abuts against the first connecting rod to prevent the riser assembly from continuing to pivot away from the folding position.

5. The inclined tube folding mechanism according to claim 3, characterized in that, The locking assembly includes an eccentric shaft and a locking wrench. The eccentric shaft has an eccentric hole. The central axis of the eccentric shaft is collinear with the first pivot axis. The central axis of the eccentric hole is collinear with the second pivot axis. The locking wrench is connected to the eccentric shaft. The length direction of the locking wrench is at an angle to the axial direction of the eccentric shaft. The first connecting rod is provided with a first mounting hole, and the eccentric shaft is pivotally fitted in the first mounting hole. The second connecting rod is connected with a first rotating shaft, and the first rotating shaft is pivotally fitted in the eccentric hole.

6. The inclined tube folding mechanism according to claim 5, characterized in that, The inclined tube folding mechanism also includes a tension spring, which connects the locking wrench and the first connecting rod, and the tension spring presses the locking wrench toward the locking position.

7. The inclined tube folding mechanism according to claim 5, characterized in that, The riser assembly includes a riser, a clamp, and an inclined tube connected in sequence. The inclined tube is pivotally connected to the frame, and the second connecting rod is pivotally connected to the clamp. The inclined tube is provided with a receiving groove, the width direction of which is consistent with the axial direction of the eccentric shaft. At least a portion of the first connecting rod and at least a portion of the second connecting rod are located in the receiving groove.

8. The inclined tube folding mechanism according to claim 7, characterized in that, The inclined tube includes two first side plates arranged axially spaced along the eccentric axis, with the receiving groove formed around the two first side plates. The first ends of the two first side plates are connected to the tube clamp, and the second ends of the two first side plates are pivotally connected to the frame.

9. The inclined tube folding mechanism according to claim 8, characterized in that, The fastener includes a knob pull pin, which is threadedly connected to the first side plate. The pin portion of the knob pull pin is located in the receiving groove. The locking wrench has a limit groove on its side opposite to the axial direction of the eccentric shaft. When the locking assembly is in the locking position, the pin of the knob pull pin engages in the limit groove.

10. The inclined tube folding mechanism according to claim 5, characterized in that, The first connecting rod includes two second side plates arranged axially spaced along the eccentric shaft; The two second side plates are provided with the first mounting holes on their opposite sides. There are two eccentric shafts, which are pivotally fitted into the two first mounting holes respectively. Both eccentric shafts are connected to the locking wrench. The two second side plates have through holes on their opposite sides that communicate with the first mounting hole. The part of the second connecting rod that is connected to the first rotating shaft is located between the two second side plates. The two ends of the first rotating shaft pass through the two through holes and are pivotally fitted into the two eccentric holes respectively.

11. A mobility scooter, characterized in that, Includes the inclined tube folding mechanism according to any one of claims 1-10.

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