Wheel mechanism and child's vehicle

Abstract

A wheel structure according to the present application is characterized by comprising: a mounting portion provided on a vehicle; a pin made of a magnetic material and extending vertically from the mounting portion; a wheel seat for mounting a wheel, the pin being inserted into the wheel seat; and a magnet provided in the wheel seat and surrounding the pin. A child vehicle is also disclosed.

Description

Technical Field

[0001] This application relates to a wheel mechanism and a children's vehicle using the wheel mechanism, and more particularly to a wheel mechanism that prevents wheel wobbling. Background Technology

[0002] A stroller is a common vehicle for infants and toddlers. Strollers typically consist of a handlebar, frame, seat, and wheels. The wheels (such as the front wheels) are usually engaged with a mounting point on the frame in a manner that allows rotation about a vertical axis, enabling the stroller to steer. In existing strollers, there may be gaps between the wheels and the mounting point, preventing the wheels from fitting snugly against the frame. Therefore, during stroller movement, the wheels may wobble, including vertical and lateral wobble. This wheel wobble creates a negative experience for the user and may compromise the stroller's safety.

[0003] Therefore, a stable wheel mechanism is needed to improve wheel wobbling. Summary of the Invention

[0004] According to the present application, a wheel structure is characterized in that the wheel structure includes: a mounting portion disposed on a carrier; a pin extending vertically from the mounting portion and made of a magnetic material; a wheel seat for mounting a wheel, the pin being inserted into the wheel seat; and a magnet disposed in the wheel seat and surrounding the pin.

[0005] In one embodiment, the pin is cylindrical, the wheel seat has a pin hole for mounting the pin, and the wheel seat is rotatable around the pin.

[0006] In one embodiment, the wheel seat has a receiving cavity surrounding the pin, and the magnet is disposed in the receiving cavity.

[0007] In one embodiment, the accommodating cavity is open to the mounting portion, and the wheel structure further includes a cover that closes the accommodating cavity, thereby isolating the magnet disposed in the accommodating cavity from the outside.

[0008] In one embodiment, the receiving cavity is an annular groove surrounding the pin, thereby separating the magnet from the pin.

[0009] In one embodiment, the pin includes a pin extending outward from the mounting portion, a fixing head located at the end of the pin, and a neck recessed between the pin and the fixing head. The fixing head is tapered towards its end and extends into the pin hole of the wheel seat. A movable engaging member is provided in the wheel seat. Under elastic bias, the engaging member extends into the pin hole from the side of the pin hole and engages with the neck to prevent the wheel seat from detaching from the mounting portion.

[0010] In one embodiment, the magnet is ring-shaped and includes a cylindrical central inner hole and an outer contour that is approximately a regular square prism; the shape of the accommodating cavity is complementary to the shape of the magnet.

[0011] In one embodiment, the accommodating cavity includes a plurality of grooves evenly arranged around the pin, and the magnet is installed in each groove.

[0012] In one embodiment, the wheel seat has a cylindrical boss that inserts into the mounting portion, and at least a portion of the receiving cavity is disposed in the boss.

[0013] A children's vehicle according to this application is characterized in that the children's vehicle includes: a frame; and a wheel structure according to this application, wherein the mounting part is a foot pedal under the frame. Attached Figure Description

[0014] Figure 1 This is a front view of the children's stroller according to this application;

[0015] Figure 2 This is a 3D image of the children's stroller;

[0016] Figure 3 It is a 3D view of the wheel section, in which the wheel is in an assembled state;

[0017] Figure 4 and Figure 5 These are two 3D images of the wheel section from different angles, with one wheel in an unassembled, disassembled state.

[0018] Figure 6 yes Figure 5 Enlarged view of the boxed area;

[0019] Figure 7 These are two three-dimensional views of the wheel section from different angles, with the wheel seat and its internal structure shown in a cross-section.

[0020] Figure 8 yes Figure 7 Enlarged view of the boxed area;

[0021] Figure 9 This is a side view of the wheel section, showing the wheel seat and its internal structure in a sectional view;

[0022] Figure 10 yes Figure 9 An enlarged view of the boxed portion.

[0023] List of reference numerals

[0024] 100 children's strollers

[0025] 110 frame

[0026] 120 Installation Department

[0027] 121 Groove

[0028] 130 wheel

[0029] 131 Pin Hole

[0030] 132 Receptacle

[0031] 133 convex platform

[0032] 140 wheel frame

[0033] 145 Buffer

[0034] 150 wheels

[0035] 160 pin

[0036] 161 Fixing Head

[0037] 162 pin

[0038] 163 Neck

[0039] 170 magnet

[0040] 180 lid

[0041] 190 card assembly Detailed Implementation

[0042] While this invention has been illustrated and described with reference to specific embodiments, it should not be limited to the details shown. Rather, various modifications to these details may be made within the scope of equivalents of the claims and without departing from the invention.

[0043] The descriptions of directions such as "front", "back", "up" and "down" used in this document are for ease of understanding only. This invention is not limited to these directions, but can be adjusted according to the actual situation. Although this application has been described with reference to typical embodiments, the terminology used is illustrative and exemplary, and not restrictive.

[0044] Reference Figures 1 to 2 The general description of the child vehicle 100 according to this application. The child vehicle 100 includes a frame 110, a mounting part 120, a wheel seat 130, a wheel frame 140, and wheels 150.

[0045] The frame 110 supports components such as the seat and sunshade. The mounting portion 120 is fixed to the frame 110; in this embodiment, it is fixed to the footrest below the frame 110. In other embodiments, it may be other components of the stroller 100 or part of the frame 110. The wheel seat 130 is mounted below the mounting portion 120. In some embodiments, the wheel seat 130 can be removed from the mounting portion 120 to facilitate the folding and transport of the stroller 100. The wheel frame 140 is mounted below the wheel seat 130. The wheel frame 140 can be fixed to the wheel seat 130 or, alternatively, to a shock absorber 145, such as a spring. Figures 7 to 10 The wheel 150 is rotatably mounted to the wheel seat 130 to provide mobility for the stroller 100.

[0046] In this embodiment, the wheel structure is shown as an example of the front wheel of the children's vehicle 100. However, it should be understood that the wheel structure of this application can also be applied to the rear wheel or can be applied to both the front and rear wheels at the same time.

[0047] Reference Figures 3 to 6 Describe the engagement method between the mounting part 120 and the wheel seat 130.

[0048] The wheel structure includes a pin 160 that extends vertically (i.e., downwardly) from the mounting portion 120. The pin 160 is made of a rigid magnetic material, such as iron or steel. The pin is inserted into the wheel seat 130, thereby assembling the wheel seat 130 to the mounting portion 120.

[0049] The pin 160 may be cylindrical, and the wheel seat 130 has a pin hole 131 for mounting the pin 160. The shape of the pin hole 131 corresponds to the shape of the pin 160, allowing the wheel seat 130 to rotate around the pin 160 (and the mounting portion 120). In this way, the wheel 150 can rotate around a vertical axis coaxial with the pin 160, thus providing a steering function.

[0050] However, the steering function of wheel 150 is not necessary, and wheel seat 130 and mounting part 110 can also be engaged with pin 160 without rotation.

[0051] The pin 160 includes a pin 162 extending outward from the mounting portion 120, a retaining head 161 located at the end of the pin 160, and a neck 163 that is radially recessed between the pin 162 and the retaining head 161. The retaining head 161 is tapered towards its end to facilitate insertion into the pin hole 131 of the wheel seat 130.

[0052] A movable engaging element 190 is provided inside the wheel seat 130. Figure 8 and Figure 10The engaging member 190 extends into the pin hole 131 from the side under elastic bias and can engage with the neck 163 to prevent the wheel seat 130 from disengaging from the mounting part 120.

[0053] When it is necessary to disassemble the wheel seat 130, the wheel seat can be separated from the pin 160 by moving the locking part 190 so that it no longer locks the pin 160.

[0054] Although the pin 160 is inserted into the pin hole 131 and engaged with the engaging member 190, the pin 160 may not be tightly fitted with the pin hole 131 and the engaging member 190; instead, there may be a gap. This can cause undesirable wobbling between the wheel seat 130 and the pin 160. For example, if the pin 160 and the pin hole 131 are detachably fixed, it will cause lateral wobbling of the wheel seat 130 relative to the pin 160, while the gap between the wheel seat 130 and the mounting portion 120 will cause vertical wobbling. Figure 4 ).

[0055] Therefore, the wheel structure also includes a magnet (or a magnetic core) 170. In this application, a magnet refers to a permanent magnet that, after being magnetized by an external magnetic field, retains part or most of its original magnetization direction. See reference... Figures 7 to 10 Describe how magnet 170 is set up.

[0056] Magnet 170 is fitted in wheel seat 130 and surrounds pin 160. A magnetic force is generated between magnet 170 and pin 160, which can prevent or at least reduce the wobbling of wheel seat 130 relative to pin 160 after it deviates from pin 160.

[0057] The wheel seat 130 has a receiving cavity 132 surrounding the pin 160, and the magnet 170 can be fitted into the receiving cavity 132. In this way, the magnet 170 is fixedly housed in the wheel seat 130 and has a fixed position relative to the wheel seat 130.

[0058] The receiving cavity 132 is open to the mounting portion 120. The wheel structure also includes a cover 180, which closes the receiving cavity 132, isolating the magnet 170 disposed in the receiving cavity 132 from the outside. This allows the magnet 170 to be inserted into the receiving cavity 132 from the outside. The cover 180 isolates the receiving cavity 132 from the outside to prevent contaminants such as sand and dust from entering the receiving cavity 132 and affecting the wheel's rotation function.

[0059] The receiving cavity 132 is an annular groove surrounding the pin 160, which spacees the magnet 170 from the pin 160. That is, the magnet 170 and the pin 160 will not directly contact each other to avoid mutual friction. However, this application is not limited to this. In another embodiment (not shown), the receiving cavity 132 may also be connected to the pin hole 131 (i.e., the receiving cavity 132 and the pin hole 131 are integrated), allowing the magnet 170 to directly contact the pin 160 inserted into the pin hole 131.

[0060] Magnet 170 can take many forms, for example, it can be as follows: Figures 7 to 10 The ring shape shown can also be multiple independent magnets (not shown) evenly arranged around the pin 160.

[0061] In an embodiment of the ring-shaped magnet 170, the magnet 170 includes a cylindrical central inner hole and an outer contour that is approximately a regular square prism. More specifically, the outer contour of the magnet 170 may be a regular square prism with rounded corners. The shape of the accommodating cavity 132 is complementary to the shape of the magnet 170. The cover 180 has a corresponding shape to the magnet 170.

[0062] In an embodiment (not shown) with multiple independent magnets 170, the accommodating cavity 132 includes multiple grooves evenly arranged around the pin 160, and each groove is equipped with a magnet 170.

[0063] The wheel seat 130 is provided with a cylindrical boss 133 that inserts into the mounting portion 120, such as Figure 6 As shown, the radial cross-sectional area of ​​the boss 133 can be smaller than the radial cross-sectional area of ​​the wheel seat 130, and can be formed, for example, in a cylindrical shape. Returning to... Figure 8 and Figure 10 The boss 133 can be inserted into the groove 121 extending upward from the bottom of the mounting part 120. The groove 121 has a shape corresponding to the outer contour of the boss 133, so that the groove 121 and the boss 133 can be engaged together.

[0064] The receiving cavity 132 is disposed within the boss 133. This allows the magnet 170 to be positioned closest to the mounting portion 120 on the wheel seat 130, achieving optimal sway reduction. In this embodiment, the magnet 170 has a certain height, allowing it to be disposed within the boss 133 at the top of the wheel seat 130; however, in another embodiment (not shown), the length of the magnet 170 may be greater than the height of the boss 133 and extend downward beyond the boss 133 into the body of the wheel seat 130.

[0065] Figures 7 to 10A buffer 145 between the wheel seat 130 and the wheel frame 140 is also shown. As mentioned above, the buffer 145 is not necessary, and the wheel frame 140 can also be directly fixed to the wheel seat 130 or formed integrally with the wheel seat 130. In this embodiment, the buffer 145 can be a spring, with one end connected to the wheel seat 130 and the other end connected to the wheel frame 140.

[0066] Since this application can be embodied in various forms without departing from the spirit and substance of this application, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted in the broadest sense within the scope defined by the claims. Therefore, all variations falling within the scope of the claims or their equivalents should be covered by the claims.

Claims

1. A wheel structure, characterized in that, The wheel structure includes: The mounting section is installed on the vehicle; The pin, extending vertically from the mounting portion, is made of magnetic material; Wheel seat, for mounting a wheel, wherein the pin is inserted into the wheel seat; and A magnet is disposed in the wheel seat and surrounds the pin; The pin is cylindrical, the wheel seat has a pin hole for mounting the pin, and the wheel seat can rotate around the pin; The pin includes a pin extending outward from the mounting portion, a fixing head located at the end of the pin, and a neck recessed between the pin and the fixing head. The fixing head is tapered towards the end and extends into the pin hole of the wheel seat. A movable engaging member is provided inside the wheel seat. Under elastic bias, the engaging member extends into the pin hole from the side of the pin hole and can engage with the neck to prevent the wheel seat from detaching from the mounting part. The wheel seat has a cylindrical boss that is inserted into the mounting portion. The wheel seat has a receiving cavity surrounding the pin. The magnet is disposed in the receiving cavity. The receiving cavity is open to the mounting portion. At least a portion of the receiving cavity is disposed in the boss. The boss is inserted into a groove extending upward from the bottom of the mounting portion. The groove has a shape corresponding to the outer contour of the boss.

2. The wheel structure according to claim 1, characterized in that: The wheel structure also includes a cover that seals the accommodating cavity, thereby isolating the magnet disposed in the accommodating cavity from the outside.

3. The wheel structure according to claim 1, characterized in that: The accommodating cavity is an annular groove surrounding the pin, which separates the magnet from the pin.

4. The wheel structure according to claim 3, characterized in that: The magnet is ring-shaped and includes a cylindrical central inner hole and an outer contour that is approximately a regular square prism; the shape of the accommodating cavity is complementary to the shape of the magnet.

5. The wheel structure according to claim 1, characterized in that: The accommodating cavity includes a plurality of grooves evenly arranged around the pin, and the magnet is installed in each groove.

6. A children's stroller, characterized in that, The children's vehicle includes: The frame; and According to any one of claims 1-5, the wheel structure wherein the mounting portion is a foot pedal under the frame.

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