Multifunctional swing car easy to disassemble and assemble

Abstract

The invention discloses a multifunctional swing car easy to disassemble and assemble, and belongs to the technical field of child toy cars. A seat face of the swing car body is composed of a fixed part and a movable part, when the backrest is used, the movable part is opened in place and is matched and locked with the fixed part to form a fixed backrest of the swing car, a fence connecting assembly is detachably installed on the back face of the fixed backrest, and the front half part of the seat face is detachably connected with a supporting rod. The two ends of the two semi-fences are respectively assembled with the matched parts of the fence connecting components and the supporting rods to form a closed fence; a hand push rod which is assembled and disassembled in a one-key mode is installed behind the trolley body, and universal wheels which are assembled and disassembled in a one-key mode are installed below the trolley body. According to the swing car, the seat backrest, the fence, the hand push rod and the rear wheels are designed to be of a one-key type disassembly and assembly structure, the problems of riding safety and difficulty in disassembly, assembly and storage of the swing car can be solved at the same time, the rear wheels can be switched between a directional state and a universal state through one key, and the swing car has the function of pushing the car under the cooperation of the hand push rod.

Description

Technical Field

[0001] This invention relates to the field of children's toy vehicle technology, specifically to a multifunctional, easily detachable, and assembleable twist car. Background Technology

[0002] The twist car, also known as a rocking car, is a cleverly designed, flexible and fun children's toy. It does not require a battery, motor or other power source, nor does it require human effort to push or the child to slide on their feet. The child only needs to turn the steering wheel left and right to make the twist car move forward.

[0003] Currently, hoverboards with backrests can be broadly categorized into three types: The first type is a fixed backrest, which is an integrated design with the seat, typically an injection-molded or blow-molded single structure. The backrest extends from the rear of the seat and cannot be removed or adjusted independently. The second type is a foldable / detachable backrest, connected to the vehicle body via hinges, buckles, or quick-release mechanisms, allowing it to be folded to the side or completely removed. The third type is an adjustable backrest, where an adjustable joint (such as a rotating shaft with a locking device) connects the backrest to the vehicle body, allowing users to adjust the backrest's tilt angle (e.g., 90°, 100°, 110°, etc.) as needed.

[0004] The backrests of the three types of scooters mentioned above are usually installed too far back. When young children ride in them, the backrests cannot provide effective support and are not matched with the child's center of gravity, causing the body to lean forward or become unstable when leaning against them.

[0005] Secondly, the backrest of a scooter is designed to be foldable / removable, but it usually does not have a railing structure. Scooters that have both a backrest and a railing structure take up a lot of space. In addition, most of the wheels and push rods on scooters are not designed to be detachable, making them very inconvenient to store.

[0006] In addition, existing hoverboards only have the function of twisting forward to move forward and cannot be used as pushcarts, which limits the expansion of the hoverboard's own functions. Summary of the Invention

[0007] In view of this, the present invention provides a multifunctional, easy-to-disassemble and assemble twist car. By designing the seat back, railing, push rod, and rear wheel into a one-click disassembly and assembly structure, it can simultaneously solve the problems of ride safety and difficulty in disassembly and storage of twist cars. The rear wheel can also switch between directional and omnidirectional states with one click, enabling the twist car to have the function of being pushed with the help of the push rod.

[0008] A multifunctional, easily detachable and assembleable scooter is disclosed. The seat of the scooter consists of a fixed part and a movable part. When the backrest is needed, the movable part is separated from the fixed part and opened by flipping or disassembling. After opening and locking with the fixed part, it forms the fixed backrest of the scooter. A fence connecting component is detachably installed on the back of the fixed backrest. A support rod is detachably connected to the front half of the seat. The two halves of the fence are assembled with the fence connecting component and the support rod respectively to form a closed fence. A push rod with one-click disassembly and assembly is installed at the rear of the scooter, and omnidirectional wheels with one-click disassembly and assembly are installed under the scooter.

[0009] Furthermore, the body of the twist car includes an upper body, a lower body, a cover backrest, a locking screw, and an unlocking button; The cover plate has an unlocking button in the middle of one end of the backrest, and the other end has a rod structure extending horizontally on the left and right sides, with a waist-shaped hole machined on the rod structure. The locking screw passes through the waist-shaped hole on the cover plate backrest insert structure and movably connects the cover plate backrest to the upper body. The cover plate backrest is locked and unlocked with the lower body through the unlocking button. The lower body has a limiting groove in the middle. When the cover backrest is flipped counterclockwise to a set angle, it is lifted up and then inserted into the limiting groove of the lower body to form a fixed backrest. When the cover backrest needs to be lowered, the cover backrest is lifted along the direction of the limiting groove to disengage it from the limiting groove and then flipped clockwise until it fits against the lower body. The unlocking button locks the cover backrest and the lower body together.

[0010] Furthermore, the upper half of the unlock button has a spring mounting cavity on the left side, a recessed pressing part on the right side of the upper half, and a hook extending downwards in the lower half of the unlock button, with a protruding edge extending horizontally from the bottom of the hook. After the spring is installed in the spring mounting cavity of the unlock button, it cooperates with the mounting groove on the back of the cover plate. The hook of the lower half of the unlock button passes through the through hole of the mounting block. Under the action of the spring, the unlock button moves to the right. The right end face of the hook fits against the inner wall of the through hole. When the back of the cover plate is closed, the protruding edge of the hook of the lower half of the unlock button hooks the limiting structure at the corresponding position of the lower body.

[0011] Furthermore, the fence connection assembly includes a body, a top cover, a button, and a spring; The upper end of the main body has a mounting cavity on each of the left and right sides. The bottom surface of the mounting cavity has a spring mounting groove and two upper cover positioning grooves. The two positioning grooves are distributed in front and behind. The outer sides of the left and right mounting cavities extend outward in the left and right directions respectively. A connecting edge is machined on the connecting edge through the thickness direction. The lower end of the main body has a downward protruding foot. The upper cover has an internal mounting cavity, and the bottom of the upper cover has a protrusion that mates with the positioning groove in the mounting cavity of the main body; The button has a spring mounting cavity at the bottom and a slotted hook at the top; After the button is installed into the mounting cavity of the top cover, the two ends of the spring are respectively installed into the spring mounting slot in the mounting cavity of the main body and the spring mounting cavity at the bottom of the button. Then the top cover is pressed down into the mounting cavity of the main body, and the protrusion at the bottom of the top cover is embedded in the positioning groove of the mounting cavity. The top cover is fixed to the main body by screws. At this time, the spring is in a compressed state.

[0012] Furthermore, the semi-fence includes an upper cover, a lower cover, a limit button, and a compression spring; Both the upper and lower covers have an overall shape that is bent at both ends. One end of the upper cover has two parallel connecting ears, and the other end is a round tube with an outer diameter smaller than the outer diameter of the rest of the cover. The limit button consists of two different cylindrical segments. The cavity inside the larger cylindrical segment is fitted with a compression spring, while the smaller cylindrical segment passes through the through hole in the lower cover. After the upper and lower covers are fixed together, the limit button is compressed and confined inside the tubular structure, with the smaller cylindrical segment of the limit button located outside the tubular structure.

[0013] Furthermore, the support rod includes a front cover, a rear cover, a button, and a compression spring; The front cover of the support rod has a T-shaped structure, and the upper horizontal part is a tubular structure. The front cover and the rear cover of the support rod are snapped together to form a mounting cavity for the support rod button. The support rod button is confined in the mounting cavity with the help of a compression spring. Under the action of the compression spring, the front end of the support rod button is outside the front cover of the support rod, and there is a horizontal notch below the front end of the support rod button.

[0014] Furthermore, the surface of the upper body is provided with a support rod mounting groove. When the support rod button is pressed down in the horizontal direction, the horizontal notch at the front end of the support rod button retracts into the support rod front cover. The support rod is aligned with the mounting groove and inserted. After the support rod is fully inserted, the support rod button is released, the compression spring releases the pressure, and the horizontal notch at the front end of the support rod button locks the edge of the upper body, realizing the connection between the support rod and the upper body. The back of the cover plate backrest is provided with a fence connection component mounting groove. A limiting groove is provided on the horizontal bottom surface of the mounting groove, and two limiting grooves are provided on the horizontal top surface of the mounting groove. The protruding foot at the lower end of the main body is inserted downward into the limiting groove. When the button is pressed down, the slot hook on the button moves downward simultaneously, pushing the main body forward into the mounting groove. After the button is released, the internal spring releases the pressure and moves upward. The slot hook above the button locks the limiting groove, realizing the connection between the fence connection component and the cover plate backrest. One end of the semi-fence with a connecting ear is movably connected to the connecting edge on the fence connecting assembly body via bolts. The semi-fence can rotate horizontally around the connection point. The other end of the semi-fence cooperates with the tubular structure at the upper end of the support rod front cover to realize the opening and closing of the fence. When closing the fence, press the limit button to retract it into the round tube, insert the round tube into the tubular structure at the upper end of the support rod front cover. The tubular structure has a limit hole that matches the small cylindrical section of the limit button. After the limit button moves to the correct position, the small cylindrical section enters the limit hole under the action of the compression spring, realizing the connection between the fence, the fence connecting assembly, and the support rod.

[0015] Furthermore, the omnidirectional wheel includes an omnidirectional wheel assembly and a locking / unlocking assembly; the omnidirectional wheel assembly is installed by engaging with an axle hole on the vehicle body through a wheel axle, and the omnidirectional wheel assembly has circumferential and axial degrees of freedom relative to the vehicle body; the locking / unlocking assembly is installed on the vehicle body, and engages with the wheel axle of the omnidirectional wheel assembly, thereby simultaneously locking and unlocking the circumferential and axial degrees of freedom of the omnidirectional wheel assembly.

[0016] Furthermore, the omnidirectional wheel assembly includes an axle, a wheel frame, a plug, a bracket, and a wheel; The upper end of the wheel axle is provided with an annular groove, and the outer circumferential surface below the annular groove is provided with a conical groove, the large end of the cone being located on the outer circumferential surface of the wheel axle; The top of the wheel frame is provided with a circular mounting groove. The bottom of the wheel axle is inserted into the mounting groove and fixedly connected to the wheel frame. The wheel is mounted on the wheel frame through a bearing. A plug is assembled on the wheel frame at the bearing mounting position to prevent the bearing from moving. The bracket is installed below the wheel frame and fixed to the bottom surface of the wheel frame.

[0017] Furthermore, the omnidirectional wheel assembly also includes a spring, a screw, a threaded rod, and a knob. The front end of the wheel frame has a vertical mounting surface. The spring is in close contact with the inner side of the mounting surface and its upper end is fixed by a screw. One end of the threaded rod passes through the mounting surface from the outside and contacts the surface of the middle section of the spring. The other end of the threaded rod is fitted with a mounting knob. The knob drives the threaded rod to rotate, causing the threaded rod to produce linear motion and push the spring to approach or move away from the wheel surface, thereby realizing stepless adjustment of the wheel speed.

[0018] Furthermore, the locking and unlocking assembly includes a button fixing shell, a button, a locking key, a push rod limiting member, a push rod return spring, a push rod, a mounting shell, a pin return spring, a toggle block return spring, a pin, a pin limiting shell, and a toggle block; The outer circumferential surface of the button fixing shell has a radially extending annular protrusion. The inner circumferential surface of the button fixing shell has strip-shaped protrusions evenly distributed along the circumferential direction. The bottom of the strip-shaped protrusions extends to the inner bottom surface of the button fixing shell. The front end of the strip-shaped protrusions consists of two inclined surfaces in the same direction. The different heights of the two inclined surfaces form a sawtooth-shaped step between them. The area between adjacent protrusions forms a reset groove along the axial direction. One end of the button is the pressing end, and the other end is the enabling end. The end face of the enabling end is machined with continuous triangular protrusions, and the outer circumferential surface of the enabling end has a raised strip, which cooperates with the reset groove inside the button fixing shell. The locking button is a circular shell that is closed at one end and open at the other. The open end extends radially into an annular convex edge, and there is a convex strip on the surface of the annular convex edge. The end face of the convex strip facing the closed end is a slope, which matches the triangular protrusion on the enable end of the button. Both the push rod and the pin are composed of two parts: a rod body and a disc-shaped body. The end face of the disc-shaped body is provided with a mounting cavity for the pin return spring. The mounting housing has two mounting cavities, an upper one and an lower one. The upper horizontal mounting cavity houses a lever and a lever return spring. The lever can move horizontally within the mounting cavity under the action of the lever return spring. The lever has a strip-shaped groove. There is a circular through hole on the bottom surface of the mounting cavity. When the upper end of the wheel axle passes through the through hole on the bottom surface of the mounting cavity and the strip-shaped groove on the lever, the left end of the strip-shaped groove is embedded into the annular groove of the wheel axle under the action of the lever return spring, thus restricting the axial displacement of the wheel axle. The mounting cavity below the mounting housing has a vertical partition that divides the mounting cavity into left and right parts. A through hole is located in the center of the partition. The push rod passes through this through hole and is fitted with a push rod return spring. A push rod limiting member is installed at the end of the rod, compressing the push rod return spring between the push rod limiting member and the partition. The button fixing housing is fixed to the left end face of the mounting housing by an annular protrusion on its outer circumference. The button is fitted inside the button fixing housing. The protrusion on the button, when engaged with the button fixing housing, restricts the button from detaching from the button fixing housing and from rotating within it. The closed end of the locking key is fitted inside the button's cavity, and the open end of the locking key is in contact with the push rod limiting member. The pin limiting housing, connected to the disc-shaped body of the push rod, forms a closed mounting chamber. The disc-shaped body of the pin is located within this mounting chamber. The pin return spring is pre-compressed between the push rod and the disc-shaped body of the pin, and the rod of the pin is located outside the pin limiting housing. The locking and unlocking components are fixed to the vehicle body by the mounting shell. The position of the toggle block corresponds to the position of the annular groove on the upper end of the wheel axle after the universal wheel assembly is installed in place, and the position of the pin corresponds to the position of the pin hole on the wheel axle.

[0019] Furthermore, the push rod includes an outer tube, an inner tube, a bushing, a handle, a button, a guide key, a force transmission rod, an inner and outer tube unlocking assembly, and a push rod unlocking assembly; The bottom of the outer tube is fixedly installed with a push rod unlocking assembly, and the bottom of the inner tube is fixedly installed with an inner and outer tube unlocking assembly. The inner tube is fitted inside the outer tube through a bushing. The button is installed at the top of the inner tube via a guide key. The bottom end of the guide key is connected to the upper end of the force transmission rod, and the lower end of the force transmission rod is connected to the inner and outer tube unlocking assembly. The downward pressure of the button is transmitted to the force transmission rod via the guide key and then acts on the inner and outer tube unlocking assembly. When the inner and outer tube unlocking assembly is subjected to positive pressure, its internal locking block retracts, thereby unlocking the inner and outer tubes. When the inner tube is pressed down to the top of the push rod unlocking assembly, the push rod unlocking assembly is subjected to positive pressure, and its internal locking pin retracts, thereby unlocking the entire push rod from the vehicle body. The handle is connected to the top of the inner tube and covers the button and handle inside it.

[0020] The inner tube is machined with an L-shaped groove, the horizontal part of which is located at the upper end, and the vertical part of which is connected to the left end of the horizontal part; the guide key is machined with a horizontal groove. The button is installed inside the guide key via a connecting pin. Under the guidance of the connecting pin, the button can move left and right relative to the guide key. The distance of movement is equal to the length of the horizontal groove on the guide key. The button and the guide key are also equipped with a transverse pin. The transverse pin and the connecting pin are vertically distributed in space. The two ends of the transverse pin protrude outside the guide key and are located in the horizontal part of the L-shaped slide groove of the inner tube.

[0021] Furthermore, the inner and outer tube unlocking assembly includes an inner tube connecting seat, a push block, a limiting block, a locking block, a reset spring, and a sliding pin; The inner tube connector is a cavity structure that is closed at the bottom and open at the top. Inside the cavity structure are two parallel ribs, and the cavity between the two ribs is used to install a limiting block, a locking block and a reset spring. The limiting block has a rectangular structure, and its shape is consistent with the cavity between the two ribs of the inner tube connecting seat. A locking block mounting groove is opened on the side of the limiting block in the horizontal direction. At the same time, oblique grooves are opened on the front and back of the limiting block to communicate with the locking block mounting groove. After the inner tube connecting seat is fitted onto the bottom of the inner tube, it is fixed to the inner tube by a pin. The return spring and the limiting block are installed into the inner tube connecting seat in sequence. The locking block is horizontally installed into the mounting groove on the limiting block. The two ends of the sliding pin pass through the two ribs inside the limiting block, and also pass through the inclined groove of the limiting block and the pin hole on the locking block. The bottom surface of the push block contacts the top surface of the limiting block. When the push block moves downward under the action of the force transmission rod, it pushes the limiting block downward synchronously and compresses the return spring. The locking block retracts into the mounting groove of the locking block under the combined action of the sliding pin and the inclined groove.

[0022] Furthermore, the push rod unlocking assembly includes an outer tube connecting seat, a pressure block, a locking pin, and a spring; The pressure block consists of a pressure-bearing part and two extrusion parts. The two extrusion parts are vertically fixed on the bottom surface of the pressure-bearing part, and an inclined surface is machined on the side of the extrusion part as the extrusion surface. One end of the locking pin is a cylindrical pin head, and the other end is machined with a spring mounting hole. The side of this end is machined with an inclined surface that matches the angle on the pressure block. After the outer tube connector is fitted onto the bottom of the outer tube, it is fixed to the outer tube by a pin. The outer tube connector has a mounting groove that mates with the pressure block for the pressure block to move up and down, and a locking pin mounting hole for the locking pin to move horizontally. A spring is installed in the spring mounting hole of the locking pin and then placed in the locking pin mounting hole. After the pressure block is installed into the mounting groove of the outer tube connector, it restricts the locking pin in the locking pin mounting hole. When the spring is in a free state, the pin head of the locking pin is located outside the outer tube connector. When the pressure block moves downward under pressure, the inclined surface of the pressing part presses the inclined surface of the locking pin, causing it to retract horizontally into the locking pin mounting hole.

[0023] Beneficial effects: 1. This invention designs the movable part of the seat surface as an openable cover backrest. After flipping open, it can be locked into a fixed backrest, allowing the backrest position to move forward and be closer to the child's waist, providing effective support and preventing safety accidents caused by leaning forward or backward during exercise. The backrest and seat are integrated into one design, forming a complete seat surface when closed, which can accommodate children of different ages. The guardrail, support rod, casters, and push rod can all be disassembled and assembled with one click. Installing the support rod and guardrail increases the safety function of the ride-on vehicle. The combination of casters and push rod transforms the ride-on vehicle into a pushcart, giving it the ability to switch between multiple functions.

[0024] 2. The fence and support rods of this invention can be completely disassembled, and the cover plate backrest can be reset into a seat surface. It can quickly switch between "with guardrail mode" and "normal mode" to meet the needs of children of different ages: young children need guardrail protection, while older children can remove the guardrail to expand their activity space. In addition, the modular design makes it easy to store and replace, reducing maintenance costs.

[0025] 3. This invention uses a fence connecting component and a support rod to form a three-point support structure in the backrest and the front half of the seat. Connecting two half-fences forms a closed fence, creating a complete ring-shaped protection to prevent children from tipping over or falling forward, effectively improving the safety of the ride-on vehicle. The half-fences are quickly locked to the support rod via a limit button, and the fence connecting component can be easily installed and removed with a single button spring mechanism, allowing for quick switching between usage modes without tools.

[0026] 4. This invention incorporates an inner and outer tube unlocking assembly within the inner tube of the push rod. The downward pressure from the button is transmitted to the force transmission rod via a guide key and then acts on the inner and outer tube unlocking assembly. Under positive pressure, the locking block inside the inner and outer tube unlocking assembly retracts, unlocking the inner and outer tubes. A push rod unlocking assembly is also incorporated within the outer tube. When the inner tube is pressed down to the upper end of the push rod unlocking assembly, the locking pin inside the push rod unlocking assembly retracts under positive pressure, unlocking the entire push rod from the vehicle body. The downward pressure of the inner tube allows for the installation and removal of the push rod from the vehicle body, thus achieving a one-button installation and removal function.

[0027] 5. This invention incorporates an L-shaped groove on the inner tube of the push rod and a horizontal groove on the guide key. Combined with the connection of the connecting pin and the horizontal pin, this creates an anti-accidental touch function for the button on the handle. The button can only be pressed by moving it horizontally a certain distance, thus preventing accidental unlocking and improving the reliability of the push rod.

[0028] 6. The unlocking function of the push rod unlocking assembly and the push rod unlocking assembly of the present invention both utilize the principle of inclined plane cooperation. Through the cooperation relationship between the inclined groove and the inclined plane, the vertical motion is converted into horizontal motion. The spring and the return spring provide the restoring force of the locking block and the locking pin. The structure is simple and highly reliable.

[0029] 7. The universal wheel of the present invention realizes one-click installation and removal of the universal wheel and the vehicle body through the locking and unlocking mechanism, and realizes one-click locking and unlocking. When parents need to pull or push the vehicle while the child is riding on the ride-on car, they only need to press the button to lock the universal wheel. When they need to play, they can unlock the universal wheel by pressing the button once. The operation is simple and convenient.

[0030] 8. The universal wheel assembly of the present invention is equipped with a spring plate. The screw is controlled by a knob to push the spring plate forward and backward horizontally. The rolling friction of the wheel is controlled by the contact pressure between the spring plate and the wheel, realizing stepless adjustment of the speed of the scooter and effectively improving the safety of children of different ages when playing. In addition, when the rear wheel is unlocked, the scooter can also have a "tail-drifting" function during the game, which enhances the entertainment value of the scooter. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the hovercraft of the present invention; Figure 2 for Figure 1 Rear view; Figure 3 for Figure 2 AA section view; Figure 4 for Figure 2 BB cross-sectional view; Figure 5 for Figure 2 CC section view; Figure 6 Exploded view of the fence and supports; Figure 7 This is a schematic diagram showing the mating relationship between the fence connection components and the cover plate backrest; Figure 8 This is a schematic diagram of the twist car of the present invention after the fence and support poles have been removed (cover and backrest closed). Figure 9 This is a schematic diagram of the twist car of the present invention after the fence and support poles have been removed (cover backrest open). Figure 10 for Figure 9 AA section view; Figure 11 for Figure 10 Enlarged view of a section at point C; Figure 12 for Figure 9 BB cross-sectional view; Figure 13 for Figure 9 DD sectional view; Figure 14 A top view of the back of the scooter without the cover; Figure 15 for Figure 14 AA section view; Figure 16 for Figure 15 A magnified view of a section at point A in the middle; Figure 17 An exploded view of the lock / unlock components; Figure 18 for Figure 17 AA section view; Figure 19 This is a side view of the scooter; Figure 20 for Figure 19 A magnified view of a section at point B in the middle; Figure 21 This is an exploded view of the omnidirectional wheel assembly; Figure 22 This is a schematic diagram (rear view) showing the installation of the push rod of the present invention with the vehicle body. Figure 23 A schematic diagram (side view) of the installation of the push rod to the vehicle body. Figure 24 for Figure 23 A magnified view of a section at point B in the middle; Figure 25 This is a schematic diagram showing the installation relationship between the buttons, guide keys, and the inner tube; Figure 26This is an exploded view of the upper part of the push rod of the present invention; Figure 27 for Figure 26 A magnified view of a section at point A in the middle; Figure 28 Exploded view of the inner and outer tube unlocking components; Figure 29 Diagram showing the mating relationship between the inner and outer tube unlocking components; Figure 30 Exploded view of the push rod unlocking assembly; Figure 31 Diagram showing the fit and connection of the push rod unlocking components; Figure 32 This is a diagram showing the fit between the pressure block and the locking pin. Figure 33 A three-dimensional structural diagram of the inner and outer tube unlocking assembly and the push rod unlocking assembly; Figure 34 This is a schematic diagram of the invention involving the addition of a headrest to the backrest of the cover plate; Figure 35 This is a schematic diagram showing the state of the handcart after the fence is removed according to the present invention.

[0032] Among them, 1-cover backrest, 2-lower body, 3-upper body, 4-unlock button, 5-end cap, 6-swivel wheel, 6-1-swivel wheel assembly, 6-1-1-wheel axle, 6-1-2-wheel frame, 6-1-3-end cap, 6-1-4-bracket, 6-1-5-wheel, 6-1-6-spring, 6-1-7-screw, 6-1-8-knob, 6-1-9-screw, 6-2-locking and unlocking assembly, 6-2-1-button fixing shell, 6-2-2-button, 6-2- 3-Locking key, 6-2-4-Push rod limiter, 6-2-5-Push rod return spring, 6-2-6-Push rod, 6-2-7-Mounting housing, 6-2-8-Pin return spring, 6-2-9-Toggle block return spring, 6-2-10-Pin, 6-2-11-Pin limit housing, 6-2-12-Toggle block, 7-Front wheel assembly, 8-Ejection mechanism, 9-Half fence, 9-1-Upper right cover, 9-2-Lower right cover, 9-3-Limit button, 9-4-Compression spring, 9-5-Upper left cover, 9-6 - Lower left cover, 10-Support rod, 10-1-Support rod front cover, 10-2-Support rod rear cover, 10-3-Support rod button, 10-4-Compression spring, 11-Fence connecting assembly, 11-1-Body, 11-2-Button, 11-3-Top cover, 11-4-Spring, 12-Compression spring, 13-Locking screw, 14-Push rod, 14-1-Outer tube, 14-2-Inner tube, 14-3-Bushing, 14-4-Handle, 14-5-Button, 14-6-Guide key, 14-7- Horizontal pin, 14-8-Connecting pin, 14-9-Force transmission rod, 14-10-Inner and outer tube unlocking assembly, 14-10-1-Inner tube connecting seat, 14-10-2-Push block, 14-10-3-Limiting block, 14-10-4-Locking block, 14-10-5-Reset spring, 14-10-6-Sliding pin, 14-11-Push rod unlocking assembly, 14-11-1-Outer tube connecting seat, 14-11-2-Pressure block, 14-11-3-Locking pin, 14-11-4-Spring. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] As attached Figure 1 As shown, the present invention provides a multifunctional, easy-to-assemble and disassemble twist car, including a body, a flip-up cover backrest 1, a detachable fence, a push rod 14, and swivel wheels 6. The body consists of an upper body 3 and a lower body 2 forming a basic load-bearing structure. A front wheel set 7 is installed at the front of the body, and two swivel wheels 6 that can be detached with one click are provided at the rear of the body.

[0035] like Figure 2 and 7As shown, the core component of the deformable backrest, the cover backrest 1, achieves its shape transformation through a special connecting mechanism. An unlocking button 4 is located in the center of one end of the cover backrest 1, and insert rod structures extend horizontally from the left and right sides of the other end. The insert rod structures are machined with oblong holes.

[0036] Figure 12 The diagram illustrates the specific method by which the locking screw 13 passes through the oblong hole in the insert structure of the cover backrest 1, thereby movably connecting the cover backrest 1 to the upper body 3. The oblong hole design provides the necessary adjustment space for the flipping process. An ejection mechanism 8 is installed on the end face of the lower body 2 that contacts the cover backrest 1. This mechanism is pressed down to store energy when the cover backrest 1 is closed. When the unlock button 4 is pressed, the ejection mechanism 8 quickly releases energy, pushing the cover backrest 1 outwards for easy opening.

[0037] like Figure 11 As shown, the unlock button 4 adopts a split structure design. The upper half of the unlock button 4 has a spring mounting cavity on the left and a recessed pressing part on the right; the lower half is a hook that extends downward, with a raised edge extending horizontally from the bottom of the hook. After the spring 12 is installed in the spring mounting cavity, it cooperates with the mounting groove on the backrest of the cover plate 1 to realize the automatic reset function.

[0038] like Figure 12 As shown, a limiting groove is provided in the middle of the lower body 2. When the cover backrest 1 is flipped counterclockwise to a set angle, it is lifted up, and then the insert rod structure on the cover backrest 1 is inserted into the limiting groove of the lower body 2 to form a fixed backrest. When it needs to be lowered, the cover backrest 1 is lifted along the direction of the limiting groove to make it disengage from the limiting groove, and then flipped clockwise until it is completely attached to the lower body 2.

[0039] like Figure 6 As shown, the safety protection system includes a fence connection assembly 11, a support post 10, and two half-fences 9, wherein, as Figure 4 As shown, the fence connection assembly 11 includes a body 11-1, a top cover 11-3, a button 11-2, and a spring 11-4; The upper end of the main body 11-1 has a mounting cavity on each of its left and right sides. The bottom surface of each mounting cavity has a spring mounting groove and two upper cover positioning grooves, which are arranged front to back. Connecting edges extend outwards from the outer sides of the two mounting cavities in the left and right directions, and connecting holes are machined through these edges in the thickness direction. The lower end of the main body 11-1 has a downward-facing protrusion, corresponding to… Figure 7Point C in the diagram; the upper cover 11-3 has an internal mounting cavity, and the bottom of the upper cover 11-3 has two protrusions that mate with the positioning grooves in the mounting cavity of the main body. The button 11-2 has a spring mounting cavity at the bottom and a slot-type hook at the top, which mates with slots A and B on the backrest 1 of the cover plate; during assembly, after the button 11-2 is inserted into the mounting cavity of the upper cover 11-3, the two ends of the spring 11-4 are respectively inserted into the spring mounting groove in the mounting cavity of the main body and the spring mounting cavity at the bottom of the button, and then the upper cover 11-3 is pressed down into the mounting cavity of the main body 11-1. The protrusions at the bottom of the upper cover 11-3 are embedded in the positioning grooves of the mounting cavity. After the upper cover 11-3 and the main body 11-1 are fixed with screws, a complete assembly is formed. At this time, the spring 11-4 is in a compressed state.

[0040] Taking the right-side semi-fence 9 as an example, it consists of an upper right cover 9-1, a lower right cover 9-2, a limit button 9-3, and a compression spring 9-4. Both the upper right cover 9-1 and the lower right cover 9-2 have a bent-end structure, with two parallel connecting ears at one end and a cylindrical structure at the other. The limit button 9-3 consists of two cylindrical segments of different diameters; the larger cylindrical segment has a cavity into which the compression spring 9-4 is installed to achieve an elastic limit function.

[0041] The support rod 10 includes a front cover 10-1, a rear cover 10-2, a button 10-3, and a compression spring 10-4. The front cover 10-1 has a T-shaped structure, with the upper horizontal portion being a tubular structure. The button 10-3, in conjunction with the compression spring 10-4, is confined within the mounting cavity formed by the interlocking of the front cover 10-1 and the rear cover 10-2, achieving a one-button locking function.

[0042] The formation process of the complete fence: the two ends of the fence connecting assembly 11 installed on the back of the cover plate backrest 1 and the support rod 10 at the front of the seat. (See attached...) Figure 7 As shown, the three connection points A, B, and C on the fence connecting component 11 correspond to the three points on the cover plate backrest 1. First, insert the protruding foot at the lower end of the body 11-1 into point C of the cover plate backrest 1, then press button 11-2 to engage points B and C, thus completing the connection between the fence connecting component 11 and the cover plate backrest 1. The connecting ears at one end of the two half-fences 9 are movably connected to the connecting edge on the body 11-1 by bolts, and the other ends of the two half-fences 9 are inserted into the tubular structure at the upper end of the support rod front cover 10-1 in the support rod 10, forming a complete ring-shaped protective structure.

[0043] As attached Figure 14 As shown, the omnidirectional wheel 6 includes an omnidirectional wheel assembly 6-1 and a locking / unlocking assembly 6-2. In this embodiment, there are two omnidirectional wheel assemblies 6-1, which are arranged in a left-right direction at the rear of the vehicle body.

[0044] The universal wheel assembly 6-1 is installed by engaging with the axle hole on the lower body 2 via the wheel axle 6-1-1. In the unlocked state, the universal wheel assembly 6-1 has circumferential and axial degrees of freedom relative to the body. The locking and unlocking assembly 6-2 is installed on the lower body 2 and engages with the wheel axle 6-1-1 in the universal wheel assembly 6-1, thereby simultaneously locking and unlocking the circumferential and axial degrees of freedom of the universal wheel assembly 6-1.

[0045] As attached Figure 20 and 21 As shown, the swivel wheel assembly includes an axle 6-1-1, a wheel frame 6-1-2, a plug 6-1-3, a bracket 6-1-4, a spring 6-1-6, a wheel 6-1-5, a knob 6-1-8, a screw 6-1-7, and a bolt 6-1-9. The upper end of the axle 6-1-1 has an annular groove, and the outer circumference below the annular groove has a conical groove, with the larger end of the conical groove located on the outer circumference of the axle 6-1-1. The top of the wheel frame 6-1-2 has a circular mounting groove, and the bottom of the axle 6-1-1 is inserted into the mounting groove and fixedly connected to the wheel frame 6-1-2. The wheel 6-1-5 is mounted on the wheel frame 6-1-2 via a bearing. The plugs 6-1-3 on the left and right sides are fitted onto the wheel frame 6-1-2 corresponding to the bearing mounting positions to prevent bearing movement. The bracket 6-1-4 is installed below the wheel frame 6-1-2 and fixed to the bottom surface of the wheel frame 6-1-3.

[0046] To enable the omnidirectional wheel to adjust its speed, a vertical mounting surface is designed at the front end of the wheel frame 6-1-2. The spring piece 6-1-6 is tightly attached to the inner side of the mounting surface and fixed to its upper end by the screw 6-1-9. One end of the screw 6-1-7 passes through the mounting surface from the outside and contacts the surface of the middle section of the spring piece 6-1-6. The other end of the screw 6-1-7 is fitted with a mounting knob 6-1-8. The knob 6-1-8 drives the screw 6-1-7 to rotate, causing the screw 6-1-7 to move linearly and push the spring piece 6-1-6 closer to or away from the surface of the wheel 6-1-5. This achieves stepless adjustment of the wheel's speed during movement, thereby improving the safety of the scooter during play.

[0047] As attached Figure 16 , 17 As shown in Figure 18, the locking / unlocking assembly 6-2 includes a button retaining housing 6-2-1, a button 6-2-2, a locking key 6-2-3, a push rod limiting member 6-2-4, a push rod return spring 6-2-5, a push rod 6-2-6, a mounting housing 6-2-7, a pin return spring 6-2-8, a toggle block return spring 6-2-9, a pin 6-2-10, a pin limiting housing 6-2-11, and a toggle block 6-2-12.

[0048] The outer circumferential surface of the button retaining housing 6-2-1 has a radially extending annular raised edge, as shown in the attached image. Figure 17As shown, strip-shaped protrusions are evenly distributed circumferentially on the inner circumferential surface of the button fixing shell 6-2-1. The bottom of the strip-shaped protrusions extends to the inner bottom surface of the button fixing shell 6-2-1. The front end of the strip-shaped protrusions consists of two inclined surfaces in the same direction. The different heights of the two inclined surfaces create a sawtooth-shaped step between them. The area between adjacent protrusions forms a reset groove for the locking key 6-2-3 to move axially. The structure of this component and its cooperation with the button 6-2-2 and the locking key 6-2-3 are the key to realizing the switching between the one-button universal and directional states.

[0049] One end of button 6-2-2 is the pressing end, and the other end is the enabling end. The end face of the enabling end is machined with continuous triangular protrusions, and the outer circumferential surface of the enabling end has circumferentially distributed ridges. These ridges cooperate with the reset groove inside the button fixing shell.

[0050] The locking button 6-2-3 is a circular shell that is closed at one end and open at the other. The open end extends radially with an annular convex edge. There is also a convex strip on the surface of the annular convex edge. The end face of the convex strip facing the closed end is a slope, which matches the triangular protrusion on the enable end of the button 6-2-2.

[0051] The push rod 6-2-6 and the pin 6-2-10 have similar structures, both consisting of a rod body and a disc-shaped body. The end face of the disc-shaped body is provided with three mounting cavities for the pin return spring.

[0052] All the above components are installed inside the mounting housing 6-2-7. The mounting housing 6-2-7 has two mounting cavities, an upper one and an lower one. The upper horizontal mounting cavity houses the toggle block 6-2-12 and the toggle block return spring 6-2-9. The toggle block can move horizontally within the mounting cavity under the action of the toggle block return spring 6-2-9. The toggle block 6-2-12 has a strip-shaped groove. There is a circular through hole on the bottom surface of the mounting cavity. When the upper end of the axle 6-1-1 passes through the through hole on the bottom surface of the mounting cavity and the strip-shaped groove on the toggle block 6-2-12, the left end of the strip-shaped groove is embedded into the annular groove of the axle under the action of the toggle block return spring 6-2-9, thus restricting the axial displacement of the axle 6-1-1.

[0053] The mounting cavity below the mounting housing 6-2-7 has a vertical partition that divides the mounting cavity into left and right parts. A through hole is located in the center of the partition. The push rod 6-2-6 passes through this through hole and is fitted with a push rod return spring 6-2-5. A push rod limiting member 6-2-4 is installed at the end of the rod, compressing the push rod return spring 6-2-5 between the pushing rod limiting member 6-2-4 and the partition. The button fixing housing 6-2-1 is fixed to the left end face of the mounting housing 6-2-7 by an annular protrusion on its outer circumference. The button is fitted inside the button fixing housing 6-2-1. The protrusion on the button, when engaged with the button fixing housing 6-2-1, restricts the button 6-2-2 from exiting the button fixing housing 6-2-1 and from rotating within it. The closed end of the locking key 6-2-3 is fitted inside the cavity of the button 3-2. The opening of the locking key 6-2-3... The inner part of the release end abuts against the push rod limiting part 6-2-4; after the pin limiting shell 6-2-11 is fixedly connected to the disc-shaped body of the push rod 6-2-6, a closed mounting chamber is formed. The disc-shaped body of the pin 3-10 is located in this mounting chamber. Three pin return springs 6-2-8 are pre-compressed between the disc-shaped bodies of the push rod 6-2-6 and the pin 6-2-10. The rod body of the pin 6-2-10 is located outside the pin limiting shell 6-2-11. Since the pin 6-2-10 is only subjected to the spring force of the pin return spring 3-8 when it moves with the pin limiting shell 6-2-11, when there is an error in the fit between the pin 3-10 and the pin hole on the axle 6-1-1, the pin return spring 6-2-8 will provide buffer protection for the pin 6-2-10 to avoid movement jamming and rigid damage, and has the function of adaptive adjustment of fit deviation.

[0054] As attached Figure 15 As shown, the locking and unlocking component 6-2 is fixed to the lower body 2 by the mounting shell 6-2-7. The position of the toggle block 6-2-12 corresponds to the position of the annular groove on the upper end of the wheel axle 6-1-1 after the universal wheel assembly 6-1 is installed. The position of the pin 6-2-10 corresponds to the height position of the pin hole on the wheel axle 6-1-1.

[0055] The process of one-click assembly and disassembly of the omnidirectional wheel assembly in this embodiment is as follows: When installing the caster wheel assembly 6-1, first insert the axle 6-1-1 of the caster wheel assembly 6-1 into the axle hole on the lower body 2. At the same time, move the lever 6-2-12 to allow space for the movement of the axle 6-1-1. After the axle 6-1-1 is in place, release the lever 6-2-12. Under the action of the lever return spring 6-2-9, the strip groove on the lever 6-2-12 is inserted into the annular groove at the upper end of the axle 6-1-1, which restricts the axial displacement of the axle 6-1-1 and thus also restricts the axial displacement of the caster wheel assembly 6-1. This allows the caster wheel assembly 6-1 to be installed with the body with one click. Similarly, when removing the caster wheel assembly 6-1, move the lever 6-2-12 horizontally in the opposite direction to release the axial restriction on the annular groove of the axle 6-1-1, thus achieving one-click removal of the caster wheel assembly 6-1.

[0056] This invention enables the directional movement of the caster wheel assembly 2 by pressing a button to drive a pin into the pin hole of the axle 2-1. Pressing the button 3-2 again causes the pin 3-10 to retract and disengage from the pin hole, restoring the circumferential rotation function of the caster wheel assembly 2. The specific process of switching between the omnidirectional and directional states of the caster wheel assembly 2 is as follows: When button 6-2-2 is pressed for the first time, the horizontal thrust is transmitted sequentially through button 6-2-2 to locking key 6-2-3, push rod limiting member 6-2-4, and push rod 6-2-6. Push rod 6-2-6 drives pin limiting shell 6-2-11 and pin 6-2-10 to move forward synchronously. Since push rod return spring 6-2-5 abuts against push rod limiting member 6-2-4 and partition, push rod return spring 6-2-5 applies a reverse force to locking key 6-2-3 through push rod limiting member 6-2-4. At this time, the triangular protrusion on the enabling end of button 6-2-2 contacts and engages with the inclined surface of the protrusion on locking key 6-2-3. As the pressing stroke increases, locking key 6-2-3 rotates by an angle (i.e., rotates by one tooth pitch) under the combined action of push rod return spring 6-2-5 and button. When the button is released, the front end of the protrusion on the locking key 6-2-3 engages with the serrated step of the strip protrusion inside the button fixing housing 6-2-1. The pin 6-2-10 remains in the extended position. Once the pin aligns with the pin hole on the axle 6-1-1, the pin 6-2-10 immediately locks the axle 6-1-1. When it is necessary to unlock the universal wheel assembly 6-1, the button 6-2-2 is pressed a second time. The locking key 6-2-3 rotates another angle, and the protrusion on the locking key 6-2-3 aligns perfectly with the gap between the strip protrusions inside the button fixing housing 6-2-1. The unlocked locking key 6-2-3, under the action of the push rod return spring 6-2-5, drives the pin 6-2-10 to retract and disengage from the pin hole on the axle 6-1-1, thus achieving one-button unlocking of the universal wheel assembly 6-1.

[0057] As attached Figure 22 and 23As shown, the push rod 14 of the present invention includes an outer tube 14-1, an inner tube 14-2, a bushing 14-3, a handle 14-4, a button 14-5, a guide key 14-6, a transverse pin 14-7, a connecting pin 14-8, a force transmission rod 14-9, an inner and outer tube unlocking assembly 14-10, and a push rod unlocking assembly 14-11.

[0058] The bottom of the outer tube 14-1 is fixedly installed with a push rod unlocking assembly 14-11, and the bottom of the inner tube 14-2 is fixedly installed with an inner and outer tube unlocking assembly 14-10. The inner tube is fitted inside the outer tube 14-1 via a bushing 14-3. The button is installed at the top of the inner tube via a guide key 14-6. The bottom end of the guide key 14-6 is connected to the upper end of the force transmission rod, and the lower end of the force transmission rod 14-9 is connected to the inner and outer tube unlocking assembly 14-10. The downward pressure of the button 14-5 is transmitted to the force transmission rod 14-10 via the guide key. -9 then acts on the inner and outer tube unlocking assembly 14-10. After the inner and outer tube unlocking assembly 14-10 is subjected to positive pressure, the locking block inside it retracts, realizing the unlocking between the inner tube 14-2 and the outer tube 14-1. When the inner tube is pressed down to the upper end of the push rod unlocking assembly, the locking pin inside the push rod unlocking assembly 14-11 retracts after being subjected to positive pressure, realizing the unlocking of the entire push rod 14 from the vehicle body. The handle 14-4 is connected to the top of the inner tube and covers the button 14-5 and the guide key 14-6 inside it.

[0059] As attached Figure 27 As shown, an L-shaped groove is machined on the inner tube 14-2, with the horizontal part of the groove located at the upper end and the vertical part of the groove connected to the left end of the horizontal part; at the same time, a horizontal groove is machined on the guide key 14-6.

[0060] Button 14-5 is installed inside the guide key via a connecting pin. Under the guidance of connecting pin 14-8, button 14-5 can move left and right relative to the guide key. The distance of movement is equal to the length of the horizontal groove on guide key 14-6. Button 14-5 and guide key 14-6 are also equipped with transverse pins 14-7. Transverse pins 14-7 and connecting pins 14-8 are vertically distributed in space. The two ends of transverse pins 14-7 protrude outside the guide key and are located in the horizontal part of the L-shaped slide groove of the inner tube.

[0061] As attached Figure 28 and 29 As shown, the inner and outer tube unlocking assembly 14-10 includes an inner tube connecting seat 14-10-1, a push block 14-10-2, a limit block 14-10-3, a locking block 14-10-4, a reset spring 14-10-5, and a sliding pin 14-10-6.

[0062] The inner tube connector is a cavity structure that is closed at the bottom and open at the top. Inside the cavity structure are two parallel ribs. The cavity between the two ribs is used to install the limit block 14-10-3, the locking block 14-10-4 and the return spring 14-10-5. The limiting block 14-10-3 has a rectangular structure, and its shape is consistent with the cavity between the two ribs of the inner tube connecting seat. The side of the limiting block 14-10-3 has a locking block mounting groove in the horizontal direction, and the front and back of the limiting block have oblique grooves that are connected to the locking block mounting groove. After the inner tube connecting seat 14-10-1 is fitted onto the bottom of the inner tube 14-2, it is fixed to the inner tube 14-2 by a pin. The return spring 14-10-5 and the limiting block 14-10-3 are sequentially installed into the inner tube connecting seat 14-10-1. The locking block 14-10-4 is horizontally installed into the mounting groove on the limiting block 14-10-3. The two ends of the sliding pin 14-10-6 pass through the two ribs inside the limiting block 14-10-3, and also pass through the inclined groove of the limiting block 14-10-3 and the pin hole on the locking block. The bottom surface of the push block 14-10-2 contacts the top surface of the limiting block 14-10-3. When the push block 14-10-2 moves downward under the action of the force transmission rod, it pushes the limiting block 14-10-3 downward synchronously and compresses the return spring 14-10-5. The locking block 14-10-4 retracts into the locking block mounting groove under the combined action of the sliding pin and the inclined groove.

[0063] As attached Figure 30 and 31 As shown, the push rod unlocking assembly 14-11 includes an outer tube connecting seat 14-11-1, a pressure block 14-11-2, a locking pin 14-11-3, and a spring 14-11-4.

[0064] The pressure block 14-11-2 consists of a pressure-bearing part and two extrusion parts. The two extrusion parts are vertically fixed on the bottom surface of the pressure-bearing part, and an inclined surface is machined on the side of the extrusion part as the extrusion surface.

[0065] One end of the locking pin 14-11-3 is a cylindrical pin head, and the other end is machined with a spring mounting hole. The side of this end is machined with a bevel that has the same angle as the pressure block 14-11-2.

[0066] After the outer tube connector 14-11-1 is fitted onto the bottom of the outer tube 14-1, it is fixed to the outer tube 14-1 by a pin. The outer tube connector 14-11-1 has a mounting groove that mates with the pressure block 14-11-2 for the pressure block 14-11-2 to move up and down. It also has a locking pin mounting hole for the locking pin 14-11-3 to move horizontally. The spring 14-11-4 is inserted into the spring mounting hole of the locking pin 14-11-3 and then placed in the lock. After the pressure block 14-11-2 is inserted into the mounting groove of the outer tube connector 14-11-1, it restricts the locking pin 14-11-3 in the locking pin mounting hole. When the spring 14-11-4 is in a free state, the pin head of the locking pin 14-11-3 is located outside the outer tube connector. When the pressure block 14-11-2 moves downward under pressure, the inclined surface of the pressing part presses the inclined surface of the locking pin 14-11-3, causing it to retract horizontally into the locking pin mounting hole.

[0067] The process of installing the push rod is as follows: A push rod mounting groove is machined at the rear of the vehicle body. A pin hole is machined on the side wall of the mounting groove to cooperate with the locking pin in the push rod unlocking assembly. When installing the push rod to the vehicle body, insert the inner tube 14-2 into the outer tube 14-1. Use the bottom of the inner tube 14-2 to press the pressure block 14-11-2 in the push rod unlocking assembly 14-11, causing the locking pin 14-11-3 to retract into the outer tube 14-1. At this time, insert the outer tube 14-1 into the bottom of the mounting groove of the vehicle body and release it. The locking pin 14-11-3 will reset under the action of the spring and be inserted into the pin hole of the vehicle body, realizing the one-click installation of the push rod.

[0068] The process of adjusting the length of the push rod is as follows: Since the outer tube 14-1 has positioning holes with a certain spacing along the length direction, when the button is pressed, the inner and outer tube unlocking assembly 14-10 in the inner tube 14-2 is activated. When the push block 14-10-2 moves downward under the action of the force transmission rod 14-9, it pushes the limit block 14-10-3 downward simultaneously and compresses the return spring 14-10-5. The locking block 14-10-4 retracts into the locking block mounting groove under the combined action of the sliding pin 14-10-6 and the inclined groove. The locking block 14-10-4 unlocks the inner tube and the outer tube. At this time, the inner tube can be lengthened or retracted as needed. When the appropriate length is adjusted and the locking block corresponds to the positioning hole on the outer tube 14-1, the button is released. The locking block 14-10-4 pops out horizontally under the action of the compression return spring 14-10-5 and enters the positioning hole of the outer tube 14-1, locking the inner tube 14-2 and the outer tube 14-1.

[0069] As attached Figure 34 As shown, a headrest can also be installed on the scooter of the present invention. The headrest is installed in the insertion hole behind the backrest 1 of the cover plate by means of a connecting rod. A sunshade can also be installed on the connecting rod.

[0070] As attached Figure 35 As shown, after the support rod and half fence are disassembled, the cover plate backrest 1 of the present invention is flipped and closed, the universal wheels are switched to the universal state, and the vehicle is pushed by the push rod 14, and the twist car becomes a handcart.

[0071] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-functional, easily detachable, and assembleable hoverboard, characterized in that, The seat of the scooter consists of a fixed part and a movable part. When the backrest is needed, the movable part is separated from the fixed part and opened by flipping or disassembling. After opening and locking with the fixed part, it forms the fixed backrest of the scooter. The back of the fixed backrest is detachably equipped with a fence connecting component. The front half of the seat is detachably connected to a support rod. The two halves of the fence are assembled with the fence connecting component and the support rod respectively to form a closed fence. A push rod with one-click disassembly is installed at the rear of the scooter, and swivel wheels with one-click disassembly are installed under the scooter.

2. The multi-functional, easily detachable, and assembleable twist scooter as described in claim 1, characterized in that, The body of the twist car includes an upper body, a lower body, a cover backrest, a locking screw, and an unlocking button; The cover plate has an unlocking button in the middle of one end of the backrest, and the other end has a rod structure extending horizontally on the left and right sides, with waist-shaped holes machined on the rod structure. The locking screw passes through the waist-shaped hole on the cover plate backrest insert structure and movably connects the cover plate backrest to the upper body. The cover plate backrest is locked and unlocked with the lower body through the unlocking button. The lower body has a limiting groove in the middle. When the cover backrest is flipped counterclockwise to a set angle, it is lifted up and then inserted into the limiting groove of the lower body to form a fixed backrest. When the cover backrest needs to be lowered, the cover backrest is lifted along the direction of the limiting groove to disengage it from the limiting groove and then flipped clockwise until it fits against the lower body. The unlocking button locks the cover backrest and the lower body together.

3. The multi-functional, easily detachable, and assembleable twist scooter as described in claim 2, characterized in that, The fence connection assembly includes a body, a top cover, a button, and a spring; The upper end of the main body has a mounting cavity on each of the left and right sides. The bottom surface of the mounting cavity has a spring mounting groove and two upper cover positioning grooves. The two positioning grooves are distributed in front and behind. The outer sides of the left and right mounting cavities extend outward in the left and right directions respectively. A connecting edge is machined on the connecting edge through the thickness direction. The lower end of the main body has a downward protruding foot. The upper cover has an internal mounting cavity, and the bottom of the upper cover has a protrusion that mates with the positioning groove in the mounting cavity of the main body; The button has a spring mounting cavity at the bottom and a slotted hook at the top; After the button is installed into the mounting cavity of the top cover, the two ends of the spring are respectively installed into the spring mounting slot in the mounting cavity of the main body and the spring mounting cavity at the bottom of the button. Then the top cover is pressed down into the mounting cavity of the main body, and the protrusion at the bottom of the top cover is embedded in the positioning groove of the mounting cavity. The top cover is fixed to the main body by screws. At this time, the spring is in a compressed state.

4. The multi-functional, easily detachable, and assembleable twist scooter as described in claim 3, characterized in that, The semi-fence includes an upper cover, a lower cover, a limit button, and a compression spring; Both the upper and lower covers have an overall shape that is bent at both ends. One end of the upper cover has two parallel connecting ears, and the other end is a round tube with an outer diameter smaller than the outer diameter of the rest of the cover. The limit button consists of two different cylindrical segments. The cavity inside the larger cylindrical segment is fitted with a compression spring, while the smaller cylindrical segment passes through the through hole in the lower cover. After the upper and lower covers are fixed together, the limit button is compressed and confined inside the tubular structure, with the smaller cylindrical segment of the limit button located outside the tubular structure.

5. The multi-functional, easily detachable, and assembleable twist scooter as described in claim 4, characterized in that, The support rod includes a front cover, a rear cover, a button, and a compression spring; The front cover of the support rod has a T-shaped structure, and the upper horizontal part is a tubular structure. The front cover and the rear cover of the support rod are snapped together to form a mounting cavity for the support rod button. The support rod button is confined in the mounting cavity with the help of a compression spring. Under the action of the compression spring, the front end of the support rod button is outside the front cover of the support rod, and there is a horizontal notch below the front end of the support rod button.

6. The multi-functional, easily detachable, and assembleable twist scooter as described in claim 5, characterized in that, The surface of the upper body is provided with a support rod mounting groove. When the support rod button is pressed down horizontally, the horizontal notch at the front end of the support rod button retracts into the support rod front cover. The support rod is aligned with the mounting groove and inserted. After the support rod is fully inserted, the support rod button is released, the compressed spring releases the pressure, and the horizontal notch at the front end of the support rod button locks the edge of the upper body, realizing the connection between the support rod and the upper body. The back of the cover plate backrest is provided with a fence connection component mounting groove. A limiting groove is provided on the horizontal bottom surface of the mounting groove, and two limiting grooves are provided on the horizontal top surface of the mounting groove. The protruding foot at the lower end of the main body is inserted downward into the limiting groove. When the button is pressed down, the slot hook on the button moves downward simultaneously, pushing the main body forward into the mounting groove. After the button is released, the internal spring releases the pressure and moves upward. The slot hook above the button locks the limiting groove, realizing the connection between the fence connection component and the cover plate backrest. One end of the semi-fence with a connecting ear is movably connected to the connecting edge on the fence connecting assembly body via bolts. The semi-fence can rotate horizontally around the connection point. The other end of the semi-fence cooperates with the tubular structure at the upper end of the support rod front cover to realize the opening and closing of the fence. When closing the fence, press the limit button to retract it into the round tube, insert the round tube into the tubular structure at the upper end of the support rod front cover. The tubular structure has a limit hole that matches the small cylindrical section of the limit button. After the limit button moves to the correct position, the small cylindrical section enters the limit hole under the action of the compression spring, realizing the connection between the fence, the fence connecting assembly, and the support rod.

7. The multi-functional, easily detachable, and assembleable twist scooter as described in claim 6, characterized in that, The omnidirectional wheel includes an omnidirectional wheel assembly and a locking / unlocking assembly; the omnidirectional wheel assembly is installed by engaging with an axle hole on the vehicle body through a wheel axle, and the omnidirectional wheel assembly has circumferential and axial degrees of freedom relative to the vehicle body; the locking / unlocking assembly is installed on the vehicle body, and engages with the wheel axle of the omnidirectional wheel assembly to simultaneously lock and unlock the circumferential and axial degrees of freedom of the omnidirectional wheel assembly.

8. The multi-functional, easily detachable, and assembleable twist scooter as described in claim 7, characterized in that, The push rod includes an outer tube, an inner tube, a bushing, a handle, a button, a guide key, a force transmission rod, an inner and outer tube unlocking assembly, and a push rod unlocking assembly; The bottom of the outer tube is fixedly installed with a push rod unlocking assembly, and the bottom of the inner tube is fixedly installed with an inner and outer tube unlocking assembly. The inner tube is fitted inside the outer tube through a bushing. The button is installed at the top of the inner tube via a guide key. The bottom end of the guide key is connected to the upper end of the force transmission rod, and the lower end of the force transmission rod is connected to the inner and outer tube unlocking assembly. The downward pressure of the button is transmitted to the force transmission rod via the guide key and then acts on the inner and outer tube unlocking assembly. When the inner and outer tube unlocking assembly is subjected to positive pressure, its internal locking block retracts, thereby unlocking the inner and outer tubes. When the inner tube is pressed down to the top of the push rod unlocking assembly, the push rod unlocking assembly is subjected to positive pressure, and its internal locking pin retracts, thereby unlocking the entire push rod from the vehicle body. The handle is connected to the top of the inner tube and covers the button and handle inside it. The inner tube is machined with an L-shaped groove, the horizontal part of which is located at the upper end, and the vertical part of which is connected to the left end of the horizontal part; the guide key is machined with a horizontal groove. The button is installed inside the guide key via a connecting pin. Under the guidance of the connecting pin, the button can move left and right relative to the guide key. The distance of movement is equal to the length of the horizontal groove on the guide key. The button and the guide key are also equipped with a transverse pin. The transverse pin and the connecting pin are vertically distributed in space. The two ends of the transverse pin protrude outside the guide key and are located in the horizontal part of the L-shaped slide groove of the inner tube.

9. The multi-functional, easily detachable, and assembleable twist scooter as described in claim 7 or 8, characterized in that, The inner and outer tube unlocking assembly includes an inner tube connecting seat, a push block, a limit block, a lock block, a reset spring, and a sliding pin. The inner tube connector is a cavity structure that is closed at the bottom and open at the top. Inside the cavity structure are two parallel ribs, and the cavity between the two ribs is used to install a limiting block, a locking block and a reset spring. The limiting block has a rectangular structure, and its shape is consistent with the cavity between the two ribs of the inner tube connecting seat. A locking block mounting groove is opened on the side of the limiting block in the horizontal direction. At the same time, oblique grooves are opened on the front and back of the limiting block to communicate with the locking block mounting groove. After the inner tube connecting seat is fitted into the bottom of the inner tube, it is fixed to the inner tube by a pin. The reset spring and the limiting block are installed into the inner tube connecting seat in sequence. The locking block is installed horizontally into the mounting groove on the limiting block. The two ends of the sliding pin pass through the two ribs inside the limiting block, and also pass through the inclined groove of the limiting block and the pin hole on the locking block. The bottom surface of the push block contacts the top surface of the limiting block. When the push block moves downward under the action of the force transmission rod, it pushes the limiting block downward synchronously and compresses the reset spring. The locking block retracts into the mounting groove of the locking block under the combined action of the sliding pin and the inclined groove. The push rod unlocking assembly includes an outer tube connector, a pressure block, a locking pin, and a spring; The pressure block consists of a pressure-bearing part and two extrusion parts. The two extrusion parts are vertically fixed on the bottom surface of the pressure-bearing part, and an inclined surface is machined on the side of the extrusion part as the extrusion surface. One end of the locking pin is a cylindrical pin head, and the other end is machined with a spring mounting hole. The side of this end is machined with an inclined surface that matches the angle on the pressure block. After the outer tube connector is fitted onto the bottom of the outer tube, it is fixed to the outer tube by a pin. The outer tube connector has a mounting groove that mates with the pressure block for the pressure block to move up and down, and a locking pin mounting hole for the locking pin to move horizontally. A spring is installed in the spring mounting hole of the locking pin and then placed in the locking pin mounting hole. After the pressure block is installed into the mounting groove of the outer tube connector, it restricts the locking pin in the locking pin mounting hole. When the spring is in a free state, the pin head of the locking pin is located outside the outer tube connector. When the pressure block moves downward under pressure, the inclined surface of the pressing part presses the inclined surface of the locking pin, causing it to retract horizontally into the locking pin mounting hole.

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