A type of unicycle

Abstract

This invention relates to the field of bicycles, and more particularly to a unicycle, comprising a transmission mechanism, a telescopic rod, two handlebars, two cranks, and a wheel. The transmission mechanism has a drive shaft and a driven shaft connected to each other. The wheel is fitted onto the driven shaft. The bottom end of the telescopic rod is hinged to the top of the transmission mechanism. The top end of the telescopic rod has a connecting tube. The bottom end of one handlebar is foldably connected to one end of the connecting tube, and the bottom end of the other handlebar is foldably connected to the other end of the connecting tube. The top end of one crank is connected to one end of the drive shaft, and the top end of the other crank is connected to the other end of the drive shaft. Each crank has a foldable pedal at its bottom end. When the unicycle is folded, the handlebars are flipped to both sides of the telescopic rod, the telescopic rod retracts and flips to fit against the side of the wheel that is angled upwards, and the first rotating cylinder rotates to flip the pedal to fit against the wheel.

Description

Technical Field

[0001] This invention relates to the field of bicycles, and more particularly to a unicycle. Background Technology

[0002] Because unicycles require a high degree of balance in operation and are more playable and challenging, they have gradually come into people's view in recent years. However, existing unicycles are usually relatively fixed in shape and size, requiring a large amount of storage space and are not convenient to store and carry. Therefore, how to provide a unicycle that can change shape and size and is easy to store and carry has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a foldable unicycle that is easy to store and carry.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: a unicycle, comprising a transmission mechanism, a telescopic rod, two handlebars, two cranks, and a wheel. The transmission mechanism is provided with a drive shaft and a driven shaft connected to each other. The wheel is fitted on the driven shaft. The bottom end of the telescopic rod is hinged to the top of the transmission mechanism. The top end of the telescopic rod is provided with a connecting tube. The bottom end of one handlebar is foldably connected to one end of the connecting tube, and the bottom end of the other handlebar is foldably connected to the other end of the connecting tube. The top end of one crank is connected to one end of the drive shaft, and the top end of the other crank is connected to the other end of the drive shaft. Each crank has a foldable pedal at its bottom end. The unicycle has a use state and a folded state. In the use state, the two handlebars and the telescopic rod are Y-shaped as a whole. The telescopic rod is unfolded above the transmission mechanism, and the pedal is perpendicular to the side of the wheel. In the folded state, the two handlebars are folded until they are parallel to the telescopic rod. The telescopic rod is retracted and rotated around the hinge end to be placed close to the transmission mechanism. One crank is rotated and placed on the left side of the transmission mechanism, and the other crank is rotated and placed on the right side of the transmission mechanism. The pedal is rotated and parallel to the wheel as a whole.

[0007] Preferably, the unicycle also includes a sliding sleeve, and the top of the transmission mechanism is provided with a hinge column. The bottom end of the telescopic rod is hinged to the hinge column. The sliding sleeve is fitted on the telescopic rod and can slide along the axial direction of the telescopic rod. In the use state, the top end of the sliding sleeve is fitted on the telescopic rod, and the bottom end of the sliding sleeve is fitted on the hinge column. In the folded state, the sliding sleeve is detached from the hinge column and slides on the telescopic rod.

[0008] Preferably, the top of the hinged column is provided with a first joint, and the bottom of the telescopic rod is matched with a second joint. The first joint is provided with a through groove, and a pin is connected between the inner walls of the through groove. The second joint extends into the through groove and is hinged to the pin.

[0009] Preferably, the grip on the left side further includes a connecting ring and a limiting rod. The bottom end of the grip is bent to one side to form a transition end. A pair of guide grooves are provided on the side wall of the transition end, passing through the side wall and through the opposite side. The end of the connecting tube connected to the grip has a notch corresponding to the guide groove. The limiting rod is inserted from one side of the connecting ring, passes through the guide groove, and is fixed to the other side of the connecting ring. The connecting ring is sleeved on the transition end. In the use state, the limiting rod is engaged with the notch to restrict the rotation of the grip. In the folded state, the limiting rod can slide along the guide groove and disengage from the notch. The grip on the right side has a structure symmetrical to that of the grip on the left side. The two ends of the connecting tube have symmetrical structures.

[0010] Preferably, the crank on the left side further includes a first rotary cylinder. The bottom end of the crank is provided with a first connecting post, the side wall of the first connecting post is provided with a first limiting block, the inner wall of the first rotary cylinder is provided with a second limiting block, the first rotary cylinder is sleeved on the first connecting post, and the foot pedal is connected to the outside of the first rotary cylinder. In use, the foot pedal drives the first rotary cylinder to rotate to the first position. At this time, the first limiting block and the second limiting block abut against each other. The structure of the crank on the right side is symmetrical to that of the crank on the left side.

[0011] Preferably, the transmission mechanism further includes a first crank limiting structure disposed on the left side of the transmission mechanism and a second crank limiting structure disposed on the right side of the transmission mechanism. The first crank limiting structure includes a second connecting post, a second rotating cylinder, and a torsion spring. The second connecting post is disposed on the left side of the transmission mechanism and adjacent to the drive shaft. A third limiting block is provided on the side wall of the second connecting post. A first stop is provided on one side of the second rotating cylinder, and a shift block is provided on the other side of the second rotating cylinder. A fourth limiting block is provided on the inner wall of the second rotating cylinder. The second rotating cylinder is sleeved on the second connecting post. A second stop is provided on the top side of the crank located on the left side. One end of the torsion spring is connected to the second connecting post, and the other end of the torsion spring is connected to the second rotating cylinder. In the working state, the third limiting block and the fourth limiting block abut against each other. The torsion spring limits the first stop to the limiting position of the second stop. Rotating the second rotating cylinder can cause the first stop to disengage from the limiting position of the second stop. The second crank limiting structure is symmetrical to the first crank limiting structure.

[0012] Preferably, the unicycle also includes two limiting wheels, one of which is connected to one end of the driven shaft and the other to the other end of the driven shaft. Either limiting wheel is used to limit the downward movement of the crank corresponding to that limiting wheel.

[0013] Preferably, the connecting tube is inverted V-shaped, and the bend in the connecting tube is connected to the top of the telescopic rod. The top of the handle includes a main rod and a secondary rod. The main rod is connected to the upper end of the secondary rod, and the adapter end is connected to the lower end of the secondary rod. The adapter end can be folded and connected to the corresponding end of the connecting tube. In the use state, the secondary rods, adapter ends and connecting tubes of the two handles are W-shaped as a whole. In the folded state, the secondary rods, adapter ends and connecting tubes of the two handles are inverted V-shaped as a whole.

[0014] Preferably, the telescopic rod includes an inner tube and an outer tube. The bottom end of the outer tube is hinged to the top end of the hinge post. A sliding sleeve is fitted on the bottom end of the outer tube. The inner tube is fitted inside the outer tube. A quick-release switch for limiting the sliding of the inner tube is fitted on the top end of the outer tube. A connecting tube is provided on the top end of the inner tube.

[0015] Preferably, there are two wheels, one wheel is located at one end of the driven shaft and the other wheel is located at the other end of the driven shaft.

[0016] (III) Beneficial Effects

[0017] The beneficial effects of this invention are as follows: Users can fold the two handlebars in sequence until they are parallel to the telescopic rod, then retract the telescopic rod and flip it around the hinge end to place it close to the transmission mechanism. At the same time, flip one crank and place it on the left side of the transmission mechanism, and flip the other crank and place it on the right side of the transmission mechanism. Finally, flip the pedals to be parallel to the wheels. This completes the folding operation of the bicycle. It solves the problem that the shape and size of existing unicycles are relatively fixed and require a large amount of storage space, making unicycles easier to store and carry. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 The structural explosion of the unicycle of the present invention Figure 1 ;

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0022] Figure 4 for Figure 1 Enlarged view of point C in the middle;

[0023] Figure 5 for Figure 1 Enlarged view at point D;

[0024] Figure 6 This is a schematic diagram of the structure of the present invention in use. Figure 1 ;

[0025] Figure 7 This is a schematic diagram of the structure of the present invention in a folded state;

[0026] Figure 8 The structural explosion of the unicycle of the present invention Figure 2 ;

[0027] Figure 9 for Figure 8 Enlarged view at point E in the middle;

[0028] Figure 10 The structural explosion of the unicycle of the present invention Figure 3 ;

[0029] Figure 11 for Figure 10 Enlarged view at point F;

[0030] Figure 12 This is a schematic diagram of the structure of the present invention in use. Figure 2 .

[0031] In the diagram: 1. Transmission mechanism; 10. Drive shaft; 11. Driven shaft; 12. Limiting wheel; 13. Wheel; 14. Hinge column; 140. First inclined surface; 141. First connector; 142. Through groove; 143. Pin; 15. Second rotating drum; 150. First stop block; 151. Toggle block; 152. Fourth limiting block; 16. Torsion spring; 17. Second connecting column; 170. Third limiting block; 2. Telescopic rod; 21. Outer tube; 210. Second inclined surface; 211. Second connector; 2. 12 Quick-release switch, 22 Inner tube, 23 Sliding sleeve, 3 Grip, 31 Adapter end, 310 Guide groove, 32 Secondary rod, 33 Main rod, 4 Crank, 41 First rotary cylinder, 410 Second limit block, 42 ​​Foot pedal, 43 First connecting post, 430 First limit block, 44 Second stop block, 5 Connecting tube, 51 Connecting ring, 52 Notch, 53 Limiting rod, 61 Gear seat, 62 Spring piece, 63 Ratchet, 64 Gear sleeve, 71 Bearing, 72 Rotating sleeve. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] See appendix Figure 1 - Appendix Figure 12A unicycle includes a transmission mechanism 1, a telescopic rod 2, two handlebars 3, two cranks 4, and a wheel 13. The transmission mechanism 1 has a drive shaft 10 and a driven shaft 11 connected to each other. The wheel 13 is mounted on the driven shaft 11. The bottom end of the telescopic rod 2 is hinged to the top of the transmission mechanism 1. The top end of the telescopic rod 2 has a connecting tube 5. The bottom end of one handlebar 3 is foldably connected to one end of the connecting tube 5, and the bottom end of the other handlebar 3 is foldably connected to the other end of the connecting tube 5. The top end of one crank 4 is connected to one end of the drive shaft 10, and the top end of the other crank 4 is connected to the other end of the drive shaft 10. The bottom of each crank 4 is equipped with a foldable pedal 42. The unicycle has a working state and a folded state. In the working state, the two handlebars 3 and the telescopic rod 2 are in a Y-shape. The telescopic rod 2 is unfolded above the transmission mechanism 1, and the pedal 42 is perpendicular to the side of the wheel 13. In the folded state, the two handlebars 3 are folded until they are parallel to the telescopic rod 2. The telescopic rod 2 is retracted and flipped around the hinge end to be close to the transmission mechanism 1. One crank 4 is flipped and placed on the left side of the transmission mechanism 1, and the other crank 4 is flipped and placed on the right side of the transmission mechanism 1. The pedal 42 is flipped and is parallel to the wheel 13.

[0034] Specifically, under normal conditions, the pedal 42 is positioned horizontally on the outside of the crank 4 for easy pedaling; the grip 3 is L-shaped and is connected to the end of the connecting tube 5 via its bottom bend, so that the grip 3 can be rotated around the bend to the side of the telescopic rod 2.

[0035] In this embodiment, the transmission mechanism 1 further includes a first ratchet disposed at the left end of the drive shaft 10 and a second ratchet disposed at the right end of the drive shaft 10. The crank 4 located on the left side of the transmission mechanism 1 is driven to the left end of the drive shaft 10 through the first ratchet, and the crank 4 located on the right side of the transmission mechanism 1 is driven to the right end of the drive shaft 10 through the second ratchet. The drive shaft 10 and the driven shaft 11 are connected by a transmission chain, a gear, or a combination of a transmission chain and a gear. Other transmission methods may also be used, which will not be described in detail here. The first and second ratchet wheels can only rotate in one direction. The second ratchet wheel includes a gear seat 61, a spring 62, a ratchet tooth 63, and a gear sleeve 64. The second ratchet wheel, through the gear sleeve 64 located inside the front end of the right crank 4, engages with the gear seat 61 at the right end of the drive shaft 10, enabling the drive shaft 10 to rotate in one direction relative to the right crank 4. That is, the ratchet tooth 63 engages with the gear seat 61, and one end of the spring 62 abuts against the ratchet tooth 63, while the other end abuts against the gear seat 61, so that the ratchet tooth 63 meshes with the gear sleeve 64 to achieve one-way locking. The first and second ratchet wheels are symmetrically arranged, specifically... When in use, when the right crank 4 moves from top to bottom, the right crank 4 and drive shaft 10 are locked. The right crank 4 drives the drive shaft 10 to rotate, and the drive shaft 10 performs work inward, realizing power input. When the right crank 4 moves from bottom to top, the right crank 4 and drive shaft 10 are unlocked. The right crank 4 returns to its original position while the drive shaft 10 does not rotate. That is, the movement from bottom to top is the free-spinning stroke of the right crank 4. Moreover, the crank 4 can be driven by the corresponding torsion spring assembly to perform a reset movement from bottom to top, improving the user experience of the bicycle. It is worth mentioning that the number of the aforementioned spring 62 and ratchet 63 can be set as needed, such as one, two, three, etc.

[0036] Furthermore, the unicycle also includes a sliding sleeve 23. The top of the transmission mechanism 1 is provided with a hinge post 14. The bottom end of the telescopic rod 2 is hinged to the hinge post 14. The sliding sleeve 23 is sleeved on the telescopic rod 2 and can slide along the axial direction of the telescopic rod 2. In the use state, the top end of the sliding sleeve 23 is sleeved on the telescopic rod 2, and the bottom end of the sliding sleeve 23 is sleeved on the hinge post 14. In the folded state, the sliding sleeve 23 is detached from the hinge post 14 and slides on the telescopic rod 2.

[0037] In one embodiment, the outer wall of the bottom end of the telescopic rod 2 is provided with an external thread, and the inner wall of the sliding sleeve 23 is provided with an internal thread that is screwed into the external thread. The user can rotate the sliding sleeve 23 to drive its bottom end to slide onto the hinge post 14 along the telescopic rod 2. The self-locking characteristic of the thread ensures a stable connection between the sliding sleeve 23 and the hinge post 14, preventing the sliding sleeve 23 from easily coming loose and improving the safety of using the unicycle.

[0038] Furthermore, the top of the hinge column 14 is provided with a first connector 141, and the bottom of the telescopic rod 2 is matched with a second connector 211. The first connector 141 is provided with a through groove 142, and a pin 143 is connected between the inner walls of the through groove 142. The second connector 211 extends into the through groove 142 and is hinged to the pin 143.

[0039] In this embodiment, a first inclined surface 140 is provided on one side of the top end of the hinge post 14. A triangular first connector 141 is provided on the first inclined surface 140. A through groove 142 is provided on the first connector 141 along the length direction of the first inclined surface 140. A pin 143 is connected between the inner walls of the through groove 142. A second inclined surface 210 is provided on one side of the bottom end of the telescopic rod 2 along the vertical direction of the first inclined surface 140. The second inclined surface 210 abuts against one side of the inclined surface of the first connector 141. A triangular second connector 211 is provided on the second inclined surface 210. The second connector 211 extends into the through groove 142 and is sleeved on the pin 143. One side of the inclined surface of the second connector 211 abuts against the first inclined surface 140.

[0040] In summary, when the hinge post 14 and the telescopic rod 2 are coaxial, and the telescopic rod 2 is vertically positioned above the hinge post 14, the second inclined surface 210 abuts against the inclined surface of the first joint 141 facing the front of the unicycle, and the inclined surface of the second joint 211 located in the through groove 142 abuts against the first inclined surface 140. With the cooperation of the sliding sleeve 23, the telescopic rod 2 is restricted from swinging downwards directly in front of the unicycle, providing additional support for the telescopic rod 2 during use.

[0041] Furthermore, the grip 3 located on the left side also includes a connecting ring 51 and a limiting rod 53. The bottom end of the grip 3 is bent to one side to form a transition end 31. The side wall of the transition end 31 is provided with a pair of guide grooves 310 that pass through the side wall to the opposite side. The end of the connecting tube 5 connected to the grip 3 is provided with a notch 52 corresponding to the guide groove 310. The limiting rod 53 is inserted from one side of the connecting ring 51, passes through the guide groove 310 and is fixed to the other side of the connecting ring 51. The connecting ring 51 is sleeved on the transition end 31. In the use state, the limiting rod 53 is engaged with the notch 52 to restrict the rotation of the grip 3. In the folded state, the limiting rod 53 can slide along the guide groove 310 and disengage from the notch 52. The structure of the grip 3 located on the right side is symmetrical to that of the grip 3 located on the left side. The structures at both ends of the connecting tube 5 are symmetrical.

[0042] Specifically, the guide groove 310 is axially arranged along the adapter end 31 of the handlebar 3, and the limiting rod 53 is locked in the guide groove 310. The connecting ring 51 is connected to the limiting rod 53. Therefore, the limiting rod 53 can be controlled to slide axially through the connecting ring 51. The angle between the line connecting the two notches 52 at the same end of the connecting tube 5 and the horizontal plane is about 15 degrees, so that the handlebar 3 is set at the top of the telescopic rod 2 with the whole body facing upward and slightly tilted forward. At this time, the two ends of the limiting rod 53 are respectively locked in the corresponding notches 52, and the limiting rod 53 cannot swing. Thus, by locking with the guide groove 310, the rotation of the adapter end 31 of the handlebar 3 is restricted, so that the handlebar 3 can be fixed for use. The end of the handlebar 3 held is slightly tilted towards the front of the vehicle. When the whole vehicle is relatively small, the user can naturally reach out to control the position of the handlebar 3, which is conducive to hand control and force exertion. At the same time, the center of gravity is located in the middle of the wheel 13, and the riding is ergonomic.

[0043] In one embodiment, a spring is provided in the adapter end 31 of the grip 3, and a hook is provided in the end of the adapter end 31. One end of the spring is connected to the hook, and the other end is fixed to the corresponding limiting rod 53, so that the limiting rod 53 is pulled by the spring, and the limiting rod 53 is engaged with the notch 52 under the action of elastic force, so as to prevent the grip 3 from swinging easily and ensure the stable use of the grip 3.

[0044] Furthermore, the crank 4 on the left side also includes a first rotating cylinder 41. The bottom end of the crank 4 is provided with a first connecting post 43. The side wall of the first connecting post 43 is provided with a first limiting block 430. The inner wall of the first rotating cylinder 41 is provided with a second limiting block 410. The first rotating cylinder 41 is sleeved on the first connecting post 43. The foot pedal 42 is connected to the outside of the first rotating cylinder 41. In use, the foot pedal 42 drives the first rotating cylinder 41 to rotate to the first position. At this time, the first limiting block 430 and the second limiting block 410 abut against each other. The structure of the crank 4 on the right side is symmetrical to that of the crank 4 on the left side.

[0045] Specifically, when the first rotating cylinder 41 is in the first position, the pedal 42 flips and unfolds to the outside of the crank 4. The second limiting block 410 rotates synchronously with the first rotating cylinder 41 and abuts against the first limiting block 430. The first limiting block 430 restricts the further rotation of the first rotating cylinder 41, thereby preventing the pedal 42 from continuing to flip down, so that the pedal 42 remains horizontally on the outside of the crank 4 for the user to use.

[0046] Furthermore, the transmission mechanism 1 also includes a first crank limiting structure disposed on the left side of the transmission mechanism 1 and a second crank limiting structure disposed on the right side of the transmission mechanism 1. The first crank limiting structure includes a second connecting post 17, a second rotating drum 15, and a torsion spring 16. The second connecting post 17 is disposed on the left side of the transmission mechanism 1 and adjacent to the drive shaft 10. A third limiting block 170 is provided on the side wall of the second connecting post 17. A first stop block 150 is provided on one side of the second rotating drum 15, and a lever block 151 is provided on the other side of the second rotating drum 15. A fourth limiting block 16 is provided on the inner wall of the second rotating drum 15. 52. The second rotating drum 15 is sleeved on the second connecting post 17. The crank 4 on the left side has a second stop 44 on its top side. One end of the torsion spring 16 is connected to the second connecting post 17, and the other end of the torsion spring 16 is connected to the second rotating drum 15. In use, the third limiting block 170 abuts against the fourth limiting block 152. The torsion spring 16 limits the first stop 150 to the limiting position of the second stop 44. Rotating the second rotating drum 15 can make the first stop 150 disengage from the limiting position of the second stop 44. The second crank limiting structure is symmetrical to the first crank limiting structure.

[0047] Specifically, when the first stop 150 is in the limit position, the first stop 150 is adjacent to the top of the crank 4. If the corresponding crank 4 swings upward, the first stop 150 will abut against the second stop 44. The crank 4 on the right side is also provided with a second stop 44 on its top side, and is symmetrically arranged with the top of the crank 4 on the left side.

[0048] When the bottom of crank 4 swings up to a certain height, the second stop 44 will rotate synchronously with the top of crank 4 and abut against the side wall of the first stop 150. At this time, because the third limit block 170 and the fourth limit block 152 are abutting, the second rotating drum 15 cannot continue to rotate upward. Therefore, the first stop 150 is relatively fixed to limit the bottom of crank 4 from continuing to swing upward, prevent crank 4 from swinging too much during user use and causing safety accidents, and improve the safety of using the unicycle. Under normal conditions, the torsion spring 16 generates a torque on the second rotating drum 15, so that the fourth limit block 152 remains abutting against the third limit block 170, preventing the second rotating drum 15 from dislodging and causing the first stop 150 to leave the limit position, ensuring that the first stop 150 is always fixed in the position that can abut against the second stop 44.

[0049] Furthermore, the unicycle also includes two limiting wheels 12, one limiting wheel 12 is connected to one end of the driven shaft 11, and the other limiting wheel 12 is connected to the other end of the driven shaft 11. Either limiting wheel 12 is used to limit the downward movement of the crank 4 corresponding to that limiting wheel 12.

[0050] Specifically, when riding a unicycle, the user stands on the pedals 42 and supports the vehicle with both hands through the handlebars 3. Therefore, the pedals 42 and handlebars 3 are subjected to downward forces. When the unicycle is in motion, the pedals 42 are located behind the wheel 13 and the handlebars 3 are located in front of the wheel 13. Therefore, the center of gravity of the unicycle will fall on the center of the wheel 13, so that the wheel 13 can stably support the unicycle and help maintain overall balance when riding the unicycle.

[0051] In this embodiment, bearing assemblies are provided at both ends of the driven shaft 11. Each bearing assembly includes two bearings 71 and a rotating sleeve 72. The bearings 71 are sequentially sleeved on the ends of the driven shaft 11 along its axial direction. The rotating sleeve 72 is sleeved on the two bearings 71, and limiting wheels 12 are respectively sleeved on the corresponding rotating sleeves 72. The limiting wheels 12 are used to limit the downward swing range of the bottom end of the crank 4. When the crank 4 swings down to a certain position, it will abut against the limiting wheel 12 to prevent the crank 4 from swinging too far. When the crank 4 is in contact with the limit wheel 12, the user can use the limit wheel 12 as a support to rest the crank 4 on the limit wheel 12. Since the driven shaft 11 will rotate during the bicycle's movement, the rotating sleeve 72 and bearing 71 are provided to prevent the limit wheel 12 from rotating with the driven shaft 11. This prevents the crank 4 from braking the rotation of the driven shaft 11 when it contacts the limit wheel 12. The double bearing 71 can further reduce the frictional resistance when the limit wheel 12 and the driven shaft 11 rotate relative to each other, making the driven shaft 11 rotate more smoothly.

[0052] Furthermore, the connecting tube 5 is inverted V-shaped, and the bend of the connecting tube 5 is connected to the top of the telescopic rod 2. The top of the handle 3 includes a main rod 33 and a secondary rod 32. The main rod 33 is connected to the upper end of the secondary rod 32, and the adapter end 31 is connected to the lower end of the secondary rod 32. The adapter end 31 can be folded and connected to the corresponding end of the connecting tube 5. In the use state, the secondary rods 32, the adapter end 31 and the connecting tube 5 of the two handles 3 are W-shaped as a whole. In the folded state, the secondary rods 32, the adapter end 31 and the connecting tube 5 of the two handles 3 are inverted V-shaped as a whole. When the bicycle is in the folded state, the handle 3 flips down around the adapter end 31 and is closer to the telescopic rod 2, and is parallel to the telescopic rod 2 as a whole, which further reduces the storage space required for the unicycle after folding.

[0053] Furthermore, the telescopic rod 2 includes an inner tube 22 and an outer tube 21. The bottom end of the outer tube 21 is hinged to the top end of the hinge post 14. The sliding sleeve 23 is fitted on the bottom end of the outer tube 21. The inner tube 22 is fitted inside the outer tube 21. The top end of the outer tube 21 is fitted with a quick-release switch 212 for limiting the sliding of the inner tube 22. The connecting tube 5 is set on the top end of the inner tube 22.

[0054] Specifically, under normal conditions, the top of the inner tube 22 slides out of the outer tube 21. At this time, the quick-release switch 212 clamps the top of the outer tube 21, causing the top of the outer tube 21 to clamp the inner tube 22, so that the inner tube 22 is fixed on the outer tube 21, so that the grip 3 can be adapted to the user's grip height.

[0055] When in use, the top of the inner tube 22 slides out above the outer tube 21.

[0056] When folded, the inner tube 22 slides and retracts inside the outer tube 21.

[0057] Furthermore, there are two wheels 13, one wheel 13 is located at one end of the driven shaft 11, and the other wheel 13 is located at the other end of the driven shaft 11.

[0058] Specifically, the two wheels 13 are symmetrically arranged on the driven shaft 11, with the transmission mechanism 1 sandwiched in the middle, so that when the bicycle is in use, the two wheels 13 evenly distribute the weight of the bicycle and stably support the bicycle.

[0059] In summary, when the user performs the folding operation, the second rotating drum 15 is first driven to rotate by the lever 151. At this time, the fourth limiting block 152 disengages from the third limiting block 170. The second rotating drum 15 pulls the torsion spring 16, which deforms and stores energy. The first stop block 150 rotates away from the top of the crank 4 as the second rotating drum 15 rotates. Now that the first stop block 150 is no longer obstructing the crank 4, the user can flip the crank 4 over the second rotating drum 15 and flip it down to the side of the limiting wheel 12. Then, the user only needs to flip the foot pedal 42 so that it rotates around the first connecting post 43 and fits against the transmission mechanism 1 to complete the folding of the crank 4 component. Then, the user slides the connecting ring 51 so that the connecting ring 51 slides toward the handle 3 adapter end 31. Under the drive of the connecting ring 51, the limiting rod 53 slides synchronously along the guide groove 310 and disengages from the notch 52. The notch 52 is used to release the restriction on the swing of the limiting rod 53, so that the connecting ring 51 can rotate synchronously with the handle 3 adapter end 31. The user can then flip the handle 3 downwards, so that the handle 3 is flipped and folded on both sides of the inner tube 22 and kept parallel to the inner tube 22. Then, the quick release switch 212 is released from the clamp on the outer tube 21, so that the inner tube 22 can slide down and retract into the outer tube 21. Finally, the sliding sleeve 23 is slid upwards, so that the bottom end of the sliding sleeve 23 is disengaged from the hinge post 14 and slides onto the outer tube 21. At this time, the user can flip the outer tube 21 downwards around the hinge end, so that the outer tube 21 is lowered to the side of the wheel 13 that is diagonally upwards. At this time, the folding operation of the unicycle is completed. This solves the problem that the shape and size of the existing unicycles are relatively fixed and require a large storage space, making the unicycle easier to store and carry.

[0060] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A unicycle, characterized in that, include: Transmission mechanism, telescopic rod, two handles, two cranks, and wheels; The transmission mechanism is provided with a drive shaft and a driven shaft that are connected to each other, and the wheel is fitted on the driven shaft; The bottom end of the telescopic rod is hinged to the top of the transmission mechanism, and the top end of the telescopic rod is provided with a connecting pipe; One grip has its bottom end foldably connected to one end of the connecting tube, and the other grip has its bottom end foldably connected to the other end of the connecting tube. One crank is connected to one end of the drive shaft at its top end, and the other crank is connected to the other end of the drive shaft at its top end. Each crank is provided with a foldable foot pedal at its bottom end. The unicycle has a used state and a folded state. In the used state, the two handlebars and the telescopic rod are in a Y-shape. The telescopic rod is extended above the transmission mechanism, and the pedals are perpendicular to the side of the wheel. In the folded state, both grips are folded until they are parallel to the telescopic rod. The telescopic rod is retracted and rotated around the hinge end to be placed close to the transmission mechanism. One crank is rotated and placed on the left side of the transmission mechanism, and the other crank is rotated and placed on the right side of the transmission mechanism. The pedal is rotated and is parallel to the wheel.

2. A unicycle according to claim 1, characterized in that, The unicycle also includes a sliding sleeve, the transmission mechanism has a hinged column at the top, the bottom end of the telescopic rod is hinged to the hinged column, the sliding sleeve is sleeved on the telescopic rod and can slide along the axial direction of the telescopic rod; In use, the top end of the sliding sleeve is fitted onto the telescopic rod, and the bottom end of the sliding sleeve is fitted onto the hinged column; In the folded state, the sliding sleeve disengages from the hinge post and slides onto the telescopic rod.

3. A unicycle according to claim 2, characterized in that, The top of the hinged column is provided with a first joint, and the bottom of the telescopic rod is matched with a second joint. The first joint is provided with a through groove, and a pin is connected between the inner walls of the through groove. The second joint extends into the through groove and is hinged to the pin.

4. A unicycle according to claim 1, characterized in that, The grip located on the left side also includes a connecting ring and a limiting rod. The bottom end of the grip is bent to one side to form a transition end. A pair of guide grooves are provided on the side wall of the transition end, passing through the opposite side from the side wall. The end of the connecting tube connected to the grip is provided with a notch corresponding to the guide groove. The limiting rod is inserted through one side of the connecting ring, passes through the guide groove and is fixed to the other side of the connecting ring, and the connecting ring is sleeved on the adapter end; When in use, the limiting rod engages with the notch to restrict the rotation of the grip; In the folded state, the limiting rod can slide away from the notch along the guide groove; The grip on the right side has a structure symmetrical to that on the left side, and the two ends of the connecting tube have symmetrical structures.

5. A unicycle according to claim 1, characterized in that, The crank located on the left side also includes a first rotary cylinder, the bottom end of which is provided with a first connecting post, the side wall of which is provided with a first limiting block, the inner wall of which is provided with a second limiting block, the first rotary cylinder being sleeved on the first connecting post, and the foot pedal being connected to the outside of the first rotary cylinder. When in use, the foot pedal drives the first rotating drum to rotate to the first position, at which time the first limiting block and the second limiting block abut against each other; The crank located on the right side has a structure that is symmetrical to that of the crank located on the left side.

6. A unicycle according to claim 1, characterized in that, The transmission mechanism further includes a first crank limiting structure disposed on the left side of the transmission mechanism and a second crank limiting structure disposed on the right side of the transmission mechanism. The first crank limiting structure includes a second connecting column, a second rotating cylinder and a torsion spring. The second connecting column is located on the left side of the transmission mechanism and adjacent to the drive shaft. The second connecting column has a third limiting block on its side wall. The second rotating drum has a first stop block on one side and a paddle block on the other side. The second rotating drum has a fourth limiting block on its inner wall. The second rotating drum is sleeved on the second connecting column. The crank located on the left side has a second stop block on its top side. One end of the torsion spring is connected to the second connecting post, and the other end of the torsion spring is connected to the second rotating cylinder; When in use, the third limiting block abuts against the fourth limiting block, and the torsion spring limits the first stop to the limiting position of the second stop; Rotating the second drum can cause the first stop to disengage from its limiting position on the second stop; The second crank limiting structure is symmetrical to the first crank limiting structure.

7. A unicycle according to claim 1, characterized in that, The unicycle also includes two limit wheels; One of the limiting wheels is rotatably connected to one end of the driven shaft, and the other limiting wheel is rotatably connected to the other end of the driven shaft; Each of the aforementioned limiting wheels is used to limit the downward movement of the crank corresponding to that limiting wheel.

8. A unicycle according to claim 4, characterized in that, The connecting pipe is inverted V-shaped, and the bent part of the connecting pipe is connected to the top of the telescopic rod; The top of the grip includes a main rod and a secondary rod. The main rod is connected to the upper end of the secondary rod, and the adapter is connected to the lower end of the secondary rod. The adapter can be folded and connected to the end of the corresponding connecting tube. When in use, the two grips, the adapter ends, and the connecting tube are W-shaped as a whole. When folded, the two grips, the adapter ends, and the connecting tube form an inverted V shape.

9. A unicycle according to claim 2, characterized in that, The telescopic rod includes an inner tube and an outer tube; The bottom end of the outer tube is hinged to the top end of the hinge post. The sliding sleeve is fitted on the bottom end of the outer tube. The inner tube is fitted inside the outer tube. The top end of the outer tube is fitted with a quick-release switch to limit the sliding of the inner tube. The connecting tube is located at the top end of the inner tube.

10. A unicycle according to claim 1, characterized in that, The vehicle has two wheels, one of which is located at one end of the driven shaft and the other at the other end of the driven shaft.

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