A trike for a young child

Abstract

The utility model discloses a tricycle for young children belongs to children's articles technical field, it includes main beam, rear fork subassembly, front fork subassembly and seat, front fork subassembly, rear fork subassembly and seat all are connected on the main beam, still include support seat, and rear fork subassembly and seat all are connected on the main beam through support seat, wherein, the seat is connected at the top of support seat, and rear fork subassembly is hinged at the bottom of support seat, be equipped with sliding slot on rear fork subassembly, set up locking block in sliding slot, and locking block and sliding slot bottom portion between have elastic component a, locking block has the freedom degree of sliding along the hinged hole center axis in sliding slot, support seat bottom portion one side is equipped with locking groove, in rear fork subassembly and support seat locking state, locking block is located in locking groove, the utility model carries convenient, adapts the use demand of different children, promotes the comfort.

Description

Technical Field

[0001] This utility model relates to a children's tricycle, and more particularly to a children's tricycle with a folding rear fork assembly and a multi-mode front wheel, belonging to the field of children's product technology. Background Technology

[0002] Children's tricycles are a common mode of transportation for children during their growth, and their structural design directly affects their safety and convenience. Currently, children's tricycles on the market have the following problems:

[0003] The rear fork assembly is fixed and not adjustable: The rear fork assembly of traditional tricycles is usually a fixed structure, which cannot be adjusted according to the height of children or their usage needs, resulting in poor comfort and applicability.

[0004] Complex locking mechanisms: Although some tricycles are equipped with locking mechanisms, their structures are complex and inconvenient to operate. Children or parents are prone to making mistakes when adjusting them, which may even pose safety hazards.

[0005] Front wheel spinning problem: There is only one rotation mode between the front wheel pedal axle and the front wheel hub of the existing tricycles, which is either the front wheel pedal axle rotates with the front wheel or the front wheel and the front wheel pedal axle are hinged and spin freely. The riding mode is limited and the scope of application is small.

[0006] To address the aforementioned issues, this utility model provides an improved children's tricycle, which significantly enhances ease of use and safety by optimizing the rear fork assembly, locking mechanism, and other components. Utility Model Content

[0007] In view of the deficiencies mentioned in the background art, this application discloses a folding tricycle for toddlers, which is easy to carry, adapts to the usage needs of different children, and improves comfort.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A toddler tricycle includes a main beam, a rear fork assembly, a front fork assembly, and a seat; the front fork assembly, the rear fork assembly, and the seat are all connected to the main beam; it also includes a support base, wherein the rear fork assembly and the seat are both connected to the main beam via the support base, wherein the seat is connected to the top of the support base, and the rear fork assembly is hinged to the bottom of the support base;

[0010] The rear fork assembly is provided with a sliding groove, and a locking block is provided in the sliding groove. An elastic component a is provided between the locking block and the bottom of the sliding groove. The locking block has the freedom to slide along the central axis of the hinge hole in the sliding groove. A locking groove is provided on one side of the bottom of the support seat. When the rear fork assembly and the support seat are locked, the locking block is located in the locking groove.

[0011] Furthermore, the rear fork pin of the rear fork assembly is located in the hinge hole of the support seat; the hinge hole is provided with an arc-shaped defect, and the rear fork pin is provided with an arc-shaped protrusion, the arc-shaped protrusion having the degree of freedom to rotate along the central axis of the hinge hole in the arc-shaped defect.

[0012] Furthermore, the rear fork assembly includes two branch tubes; the two branch tubes are fixedly connected by a rear fork pin, and each branch tube is also provided with a cover plate fixedly connected to it. The two cover plates are located on both sides of the bottom of the support seat, and the sliding groove is located on one of the cover plates.

[0013] The two rear wheels are mounted on two separate branch pipe fittings.

[0014] Furthermore, a pull rope is provided inside one of the fork tubes of the rear fork assembly; one end of the pull rope is connected to the locking block, and the other end is connected to the outer edge of the rotating block of the unlocking mechanism.

[0015] The unlocking mechanism includes a fixed block and a rotating block; the inner ends of the fixed block and the rotating block are both installed in one of the bifurcated pipes, and the inner end of the rotating block has a degree of freedom of rotation within the rotating groove of the fixed block; the outer end of the rotating block is located outside the bifurcated pipe and serves as a rotating handle.

[0016] The mounting block is also provided with an elastic component b in the swivel groove, which provides a restoring force for the swivel block.

[0017] Furthermore, it also includes a front wheel assembly, which includes a front wheel hub and a front wheel pedal axle; the front wheel hub is mounted on the front fork assembly, and the front wheel pedal axle is mounted at the center of the front wheel hub and hinged to the center of the front wheel hub;

[0018] The front wheel hub is provided with a locking mechanism; the locking mechanism includes a locking plate; the front wheel hub is provided with a locking groove, the locking plate is located in the locking groove and has the freedom to move along the central axis of the front wheel; the bottom of the locking groove is provided with a follower block, the top surface of the follower block is an inclined surface, and the locking plate abuts against the inclined surface of the follower block;

[0019] The front wheel pedal axle is provided with a groove; when the front wheel is in an idle state, the locking plate is retracted in the groove; when the front wheel and the front wheel pedal move together, the locking plate extends out of the groove and is located in the groove.

[0020] Furthermore, the locking mechanism also includes a knob; an adjustment groove is provided on one side of the slot on the front wheel hub;

[0021] The knob is located in the control groove and has the degree of freedom to rotate within the control groove; the follower block is connected to one side of the knob and rotates with the knob.

[0022] Furthermore, it also includes a push rod, which is detachably and removably connected to the end of the main beam.

[0023] Furthermore, the fork assembly includes a fork and a handlebar; the main stem of the fork is connected to the front bearing of the main beam, and the handlebar is detachably connected to the top of the main stem;

[0024] The handlebar is divided into two parts: one part is a connector section for engaging with the main stem of the fork, and the other part is the handlebar section; the handlebar section and the connector are hinged together, and the hinge axis of the hinge is perpendicular to the central axis of the main stem of the fork.

[0025] Furthermore, the top of the plug-in end is provided with a slot, and the bottom of the handlebar section is provided with a fixed rod; when the fork assembly is in the deployed state, the fixed rod is located in the slot.

[0026] The beneficial effects of adopting the above-mentioned optimized technical solution are as follows:

[0027] The rear fork assembly is rotatable, foldable, and securely locked: Through the hinged design of the support base and the rear fork assembly, combined with the cooperation of the locking block and locking groove, the angle of the rear fork assembly can be adjusted and securely locked, making it easy to store and unfold.

[0028] Easy to operate: The unlocking mechanism unlocks with a single click via a rotating block and a pull rope, allowing parents to easily adjust the rear fork assembly, saving time and effort.

[0029] Front wheel mode adjustment: The locking mechanism's locking plate engages with the slot to switch between idle mode and riding mode. The latter riding mode ensures that the front wheel pedal axle and the front wheel hub rotate synchronously, improving riding efficiency and reducing unnecessary movements, while the former idle mode makes it easier for parents to push the vehicle.

[0030] Detachable push rod design: The push rod can be flexibly disassembled and assembled, saving storage space and making it easy to carry and store.

[0031] Handlebar folding function: The handlebar section of the fork assembly can be folded to further reduce the size and facilitate transportation and storage.

[0032] High safety: All locking mechanisms are equipped with elastic components to ensure a stable locking state, prevent accidental unlocking, and protect children's riding safety. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0034] Figure 2 yes Figure 1 Diagram showing the structural relationship between the central support and the secondary support.

[0035] Figure 3 This is a schematic diagram of the inner side of the cover plate in the rear fork assembly.

[0036] Figure 4 This is a schematic diagram of the mating components of the rear fork assembly.

[0037] Figure 5 This is a schematic diagram of the inner side of another cover plate of the rear fork assembly.

[0038] Figure 6 This is a schematic diagram of the support base.

[0039] Figure 7 yes Figure 1 Diagram showing the assembly of the middle and rear wheels and the rear fork.

[0040] Figure 8 yes Figure 1 Diagram of the unlocking mechanism.

[0041] Figure 9 yes Figure 1 Diagram showing the relationship between the front fork assembly and the front wheel assembly.

[0042] Figure 10 yes Figure 9 A schematic diagram of the front and middle wheel assembly.

[0043] Figure 11 yes Figure 9 Internal front view of the structure.

[0044] Figure 12 yes Figure 9 Internal rear structure diagram.

[0045] Figure 13 This is a schematic diagram of the front wheel hub structure of the front wheel assembly.

[0046] Figure 14 This is a schematic diagram showing the mating relationships of the internal components in the front wheel hub.

[0047] Figure 15 This is a schematic diagram showing the connection between the push rod and the main beam.

[0048] Figure 16 This is a structural diagram showing the relationship between the handlebars and the fork in the front fork assembly.

[0049] Figure 17 This is a schematic diagram of the handlebar connector section located on the main stem of the front fork.

[0050] In the diagram: 1. Main beam; 1-1. End of main beam; 1-1-1. Push rod unlocking block.

[0051] 2. Front fork assembly; 2-1. Front fork; 2-1-1. Front fork main stem; 2-1-2. Handlebar removal unlocking block; 2-2-1. Handlebar handlebar section; 2-2-2. Handlebar insertion section; 2-2-3. Handlebar rotation unlocking block; 2-2-4. Fixed stem; 2-2-5. Slotted section; 2-2-6. Snap-on mechanism.

[0052] 3. Rear fork assembly; 3-1. Fork tube fitting; 3-2. Cover plate; 3-2-1. Square groove on top cover; 3-2-2. Arc-shaped protrusion on top cover; 3-2-3. Sliding groove; 3-3. Square tube; 3-4. Intermediate connector; 3-5. Locking block.

[0053] 4. Seat, 4-1. Seat seat,

[0054] 5. Push rod; 5-1. Push rod fixing block; 5-2. Push rod constraint groove; 5-3. Push rod locking block.

[0055] 6. Front wheel assembly; 6-1. Front wheel hub; 6-1-1. Inner support of front wheel hub; 6-1-2. Side plate; 6-2. Knob; 6-3. Front wheel pedal axle; 6-3-1. Hinge shaft of front wheel pedal axle; 6-4. Clamping plate; 6-5. Front wheel pedal; 6-6. Follower block; 6-7. Slot; 6-8. Adjustment slot; 6-9. Locking plate; 6-9-1. Inserted groove.

[0056] 7. Rear wheel; 7-1. Rear wheel locking plate; 7-2. Rear wheel connecting axle; 7-3. Rear wheel.

[0057] 8. Support base; 8-1. Arc-shaped defect; 8-2. Locking groove.

[0058] 9. Rotating block; 9-1. Outer end of rotating block; 9-2. Inner end of rotating block; 9-3. Extension of rotating block.

[0059] 10. Mounting block; 10-1. Reservoir for elastic component b. Detailed Implementation

[0060] The following is a detailed description of the folding tricycle for toddlers according to the present invention, with reference to the accompanying drawings. The tricycle mainly includes a main beam, front fork assembly, rear fork assembly, seat, support base, front wheel assembly, and push rod, among other components. Through optimized design, each component achieves functions such as folding, locking, and mode switching, significantly improving ease of use and safety.

[0061] 1. Description of the main structure

[0062] The structure disclosed in this embodiment mainly consists of a main beam, a front fork assembly, a rear fork assembly, a seat, and a support base. The front fork assembly is connected to the front end of the main beam, and the front wheel assembly is mounted at the bottom of the front fork assembly. A push rod is mounted at the end of the main beam for parents to push the vehicle. The support base is mounted in the middle of the main beam, with the seat mounted on top of the support base and the rear fork assembly mounted at the bottom. The rear fork assembly is tilted backward, and the rear wheel is mounted at its end.

[0063] 2. Structure and connection method of main beam and support base

[0064] like Figure 1As shown, the main beam 1 is the core support structure of the tricycle. Its front end is connected to the front fork assembly 2, and its end 1-1 has a plug-in interface for the push rod 5. The support seat 8 is fixed to the middle of the main beam 1 and is used to connect the rear fork assembly 3 and the seat 4. The top of the support seat 8 has a seat mounting position, and the bottom has a hinge hole and a locking groove 8-2. The rear fork assembly 3 is hinged to the support seat 8 through the rear fork pin. The locking block 3-5 slides along the sliding groove 3-2-3 to lock or unlock with the locking groove 8-2 (e.g., ...). Figure 2 , Figure 6 (As shown).

[0065] 3. The composition of the rear fork assembly and its folding and locking mechanism

[0066] Reference Figures 3 to 6 The rear fork assembly 3 consists of two forked tubes 3-1 fixedly connected by a rear fork pin. The two forked tubes are located on opposite sides of the support base, and their connection is achieved through the cooperation of a square tube and a square groove. The square tube and square groove prevent the two forked tubes from rotating relative to each other to form the rear fork pin. The top cover is fixedly connected to the corresponding forked tube. In this embodiment, the square grooves of the two top covers face each other, and the two ends of the square tube are respectively located in the corresponding square grooves. The arc-shaped protrusions on the intermediate connector fitted on the square tube and the arc-shaped protrusions on the two top covers are located on the same straight line to match the arc-shaped defects on the support base. The arc-shaped protrusions can rotate within the arc-shaped defects, and the rotation center axis coincides with the central axis of the square tube.

[0067] The forked pipe fitting 3-1 is equipped with a cover plate 3-2, and a sliding groove 3-2-3 is located on one of the cover plates (as shown in Figure 5). The locking block 3-5 is connected to the rotating block 9 of the unlocking mechanism via a pull rope. When the rotating block 9 is rotated, the pull rope pulls the locking block 3-5 away from the locking groove 8-2, allowing the rear fork assembly 3 to rotate and fold around the hinge hole (as shown in Figure 5). Figure 4 , Figure 8 (As shown). There is at least one elastic component, such as a spring, in the rear fork assembly; this elastic component is located at the bottom of the sliding groove and below the locking block. When the cable pulls the locking block, the spring contracts, unlocking the support and the rear fork assembly. Under force, the rear fork assembly can rotate.

[0068] 4. Mode switching function of the front wheel assembly

[0069] Reference Figures 9 to 14 The front wheel assembly 6 is mounted on the front fork of the front fork assembly. It employs an innovative mode-switching mechanism, allowing for flexible switching between riding and idle modes to meet the needs of different usage scenarios. Its structure and working principle are described in detail below:

[0070] The front wheel assembly 6 includes a front wheel hub 6-1 and a front wheel pedal axle 6-3. The front wheel hub serves as the support structure for the front wheel and has a central through-hole for connecting the front wheel pedal axle. A groove is machined into the front wheel hub to accommodate a locking plate. The front wheel pedal axle passes through the central through-hole in the front wheel hub and has pedals mounted at both ends. A locking plate is fixed to the front wheel pedal axle, and the locking plate's central axis coincides with the axle's. The locking plate has a groove for engaging with the locking plate to switch modes. A follower block is located at the bottom of the groove, with a beveled top surface for pushing the locking plate. The follower block connects to a knob and rotates with the knob. The knob is mounted on the side of the front wheel hub and is linked to the follower block; the user can switch modes by rotating the knob. An adjustment slot is located on the hub to accommodate the knob and limit its rotation range. Side plates: They are fastened to both sides of the front wheel hub. Springs are installed on the inside of the side plates. One end of the spring rests against the side plate, and the other end enters the slot and rests against the slot plate.

[0071] Working principle of mode switching: (1) Free spin mode (pedal axle rotates freely, front wheel can rotate independently), the user rotates the knob to the riding mode position, the knob drives the follower block to rotate. The inclined surface of the follower block pushes the plate to slide outward along the slot, the spring is compressed, causing the plate to partially disengage from the locking plate's groove and fully retract into the slot. The plate is completely disengaged from the pedal axle's groove, and the pedal axle is mechanically disconnected from the front wheel hub. At this time, the pedal axle can rotate freely (free spin), while the front wheel can still rotate under external force (such as being pushed by a parent), suitable for pushing. (2) Riding mode (pedal axle and hub rotate synchronously), the user rotates the knob in the opposite direction, the follower block rotates accordingly, the plate is pressed against the locking plate under the action of the spring and the inclined surface, as the pedal axle rotates, the locking plate rotates as well, when the slot is directly opposite the plate, the plate is locked in the slot under the action of the spring. At this point, the pedal axle and the front wheel hub are mechanically linked, and when the pedal is pressed, the front wheel rotates accordingly, thus enabling the riding function.

[0072] Other notes: Elastic reset design: The design of both ends of the spring or inclined plane being flat ensures the plate remains stable when no force is applied, preventing accidental switching. Knob limit structure: The control groove has limit protrusions or recesses; a "click" sound is emitted when the knob is rotated to a specific position, indicating that the mode has been switched to the correct position. Anti-accidental touch protection: The knob surface has anti-slip texture and a semi-concealed design to prevent accidental operation by children.

[0073] 4. Detachable design of pushrod and fork assembly

[0074] The detachable design of push rod 5 and the end of the main beam 1-1, as well as the detachable design of the handle and fork, are basically the same. The fit between the push rod and the end of the main beam illustrates the basic structural form and principle of the detachable design: Push rod 5 is connected to the end of the main beam 1-1 through push rod fixing block 5-1. A constraint groove 5-2 for the push rod is provided within the push rod fixing block. The locking block 5-3 and spring are located in the constraint groove of the push rod, with the spring located at the bottom of the locking block 5-3. The locking block portion of the push rod protrudes through the wall of the end of the main beam. Pressing the push rod unlocking block on the end of the main beam retracts the protruding portion of the locking block into the constraint groove of the push rod, and the spring contracts, allowing the push rod to be removed. The push rod locking block 5-3 ensures a secure connection (e.g., ...). Figure 15 (As shown)

[0075] The handlebar connector is inserted into the main stem of the fork. The spring inside the connector aligns with a small hole on the main stem. In the locked state, the spring is located in the small hole. To unlock and remove the handlebar, press down on the handlebar release block on the main stem to retract the spring, then pull off the handlebar to remove it.

[0076] The handlebar of the front fork assembly 2 consists of a connector section 2-2-2 and a handlebar section 2-2-1, which are connected by a hinge shaft. The connector section 2-2-2 has a slot 2-2-5 at its top, and the fixed rod 2-2-4 at the bottom of the handlebar section 2-2-1 engages with the slot in the unfolded state to achieve fixation (e.g., Figure 16 , Figure 17 (As shown). When folding, push the handle upwards to rotate the unlocking block, causing the bottom end of the fixed rod 2-2-4 to disengage from the groove, allowing the handle section 2-2-1 to rotate around the hinge axis, reducing the size.

Claims

1. A toddler tricycle, comprising a main beam, a rear fork assembly, a front fork assembly, and a seat; wherein the front fork assembly, the rear fork assembly, and the seat are all connected to the main beam; characterized in that... It also includes a support base, wherein the rear fork assembly and the seat are both connected to the main beam via the support base, wherein the seat is connected to the top of the support base and the rear fork assembly is hinged to the bottom of the support base; The rear fork assembly is provided with a sliding groove, and a locking block is provided in the sliding groove. An elastic component a is provided between the locking block and the bottom of the sliding groove. The locking block has the freedom to slide along the central axis of the hinge hole in the sliding groove. A locking groove is provided on one side of the bottom of the support seat. When the rear fork assembly and the support seat are locked, the locking block is located in the locking groove.

2. A toddler tricycle according to claim 1, characterized in that, The rear fork pin of the rear fork assembly is located in the hinge hole of the support seat; the hinge hole has an arc-shaped defect, and the rear fork pin has an arc-shaped protrusion, which has the degree of freedom to rotate along the central axis of the hinge hole in the arc-shaped defect.

3. A toddler tricycle according to claim 1, characterized in that, The rear fork assembly includes two branch tubes; the two branch tubes are fixedly connected by a rear fork pin, and each branch tube is also provided with a cover plate fixedly connected to it. The two cover plates are located on both sides of the bottom of the support seat, and the sliding groove is located on one of the cover plates. The two rear wheels are mounted on two separate branch pipe fittings.

4. A toddler tricycle according to claim 1, characterized in that, A pull rope is provided inside one of the forks of the rear fork assembly; one end of the pull rope is connected to the locking block, and the other end is connected to the outer edge of the rotating block of the unlocking mechanism. The unlocking mechanism includes a fixed block and a rotating block; the inner ends of the fixed block and the rotating block are both installed in one of the bifurcated pipes, and the inner end of the rotating block has a degree of freedom of rotation within the rotating groove of the fixed block; the outer end of the rotating block is located outside the bifurcated pipe and serves as a rotating handle.

5. A toddler tricycle according to claim 1, characterized in that, It also includes a front wheel assembly, which includes a front wheel hub and a front wheel pedal axle; the front wheel hub is mounted on the front fork assembly, and the front wheel pedal axle is mounted at the center of the front wheel hub and hinged to the center of the front wheel hub. The front wheel hub is provided with a locking mechanism; the locking mechanism includes a locking plate; the front wheel hub is provided with a locking groove, the locking plate is located in the locking groove and has the freedom to move along the central axis of the front wheel; the bottom of the locking groove is provided with a follower block, the top surface of the follower block is an inclined surface, and the locking plate abuts against the inclined surface of the follower block; The front wheel pedal axle is provided with a groove; when the front wheel is in an idle state, the locking plate is retracted in the groove; when the front wheel and the front wheel pedal move together, the locking plate extends out of the groove and is located in the groove.

6. A toddler tricycle according to claim 5, characterized in that, The locking mechanism also includes a knob; an adjustment groove is provided on one side of the slot on the front wheel hub; The knob is located in the control groove and has the degree of freedom to rotate within the control groove; the follower block is connected to one side of the knob and rotates with the knob.

7. A toddler tricycle according to claim 1, characterized in that, It also includes a push rod, which is detachably and removably connected to the end of the main beam.

8. A toddler tricycle according to claim 1, characterized in that, The fork assembly includes a fork and a handlebar; the fork main stem is connected to the front bearing of the main beam, and the handlebar is detachably connected to the top of the main stem; The handlebar is divided into two parts: one part is a connector section for engaging with the main stem of the fork, and the other part is the handlebar section; the handlebar section and the connector section are hinged together, and the hinge axis of the hinge is perpendicular to the central axis of the main stem of the fork.

9. A toddler tricycle according to claim 8, characterized in that, The top of the plug section is provided with a slot, and the bottom of the handlebar section is provided with a fixed rod; when the fork assembly is deployed, the fixed rod is located in the slot.

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