A comfortable and light child's bicycle

Abstract

The application relates to a comfortable and light child bicycle, and relates to the field of bicycles, which comprises a bicycle body and balance mechanisms arranged on the two sides of the rear part of the bicycle body, the balance mechanism comprises a connecting arm arranged on the frame of the rear part of the bicycle body through an adjusting piece, an inclination arm hinged to one end of the connecting arm, a mounting shaft arranged at one end of the inclination arm, an angle adjusting assembly arranged on the connecting arm and used for adjusting the inclination angle of the inclination arm, and a balance wheel rotatably arranged on the mounting shaft, and the height adjusting assembly is used for adjusting the height of the connecting arm. The balance wheel with adjustable height and angle is arranged, when a child needs to get rid of the balance assistance of the balance wheel as soon as possible, the inclination angle of the inclination arm is adjusted through the angle adjusting assembly, so that the balance wheel is separated from the ground, and therefore the child can master the balance as soon as possible.

Description

Technical Field

[0001] This application relates to the field of bicycles, and more particularly to a comfortable and lightweight children's bicycle. Background Technology

[0002] Children's bicycles are an important category of toys and children's vehicles (besides children's bicycles, children's vehicles also include children's tricycles, children's strollers, and children's walkers, etc.), and they are also a popular children's vehicle product. At the same time, children's bicycles are also an important means of transportation for children, so they have been widely used and innovated.

[0003] Chinese Patent CN210681017U discloses a children's bicycle, including a frame, a rear wheel, a front wheel, and handlebars. The rear wheel has a first connecting seat with a cavity. The rear wheel has a rear axle, and a second connecting seat is located on one side of the rear axle. The second connecting seat is connected to a lead screw. The first connecting seat is fixedly connected to one end of the frame. The frame has a sleeve rod, and a first sliding rod is fitted onto the sleeve rod. The first sliding rod has a circular groove, and a spring is fitted into the circular groove. The spring is fixedly connected to a second sliding rod, and a soft seat is fixedly connected to the second sliding rod. Symmetrical support blocks are located on the lower side of the other end of the frame. Cranks and pedals are located on both sides of the front wheel. The upper side of the frame is fixedly connected to the handlebars. This invention solves the problems of existing bicycles where the width between the rear wheels cannot be adjusted, making it easy to collide with pedestrians while riding, and the seat being inconvenient to adjust and lacking shock absorption.

[0004] Regarding the aforementioned technologies, the inventors believe that existing children's bicycles typically have balance wheels added to both sides of the rear wheel to help children learn to ride faster. However, existing balance wheels usually have direct contact with the ground, causing children to rely on the balance wheels while learning to ride and making it impossible for them to independently master balance, thus affecting their learning progress. Summary of the Invention

[0005] To improve children's learning efficiency in mastering riding balance, this application provides a comfortable and lightweight children's bicycle.

[0006] This application provides a comfortable and lightweight children's bicycle, which adopts the following technical solution:

[0007] A comfortable and lightweight children's bicycle includes a bicycle body and a balancing mechanism disposed on both sides of the rear of the bicycle body. The balancing mechanism includes a connecting arm disposed on the frame at the rear of the bicycle body via an adjusting member, a tilting arm hinged to one end of the connecting arm, a mounting shaft disposed at one end of the tilting arm, an angle adjustment component disposed on the connecting arm for adjusting the tilt angle of the tilting arm, and a balance wheel rotatably disposed on the mounting shaft. The height adjustment component is used to adjust the height of the connecting arm.

[0008] By adopting the above technical solution, when a child needs to quickly get rid of the balance wheel's balancing assistance, the tilt angle of the tilt arm can be adjusted by the angle adjustment component, causing the balance wheel to leave the ground, thus making it easier for the child to quickly master balance. When the bicycle body tilts due to improper operation by the child, the balance wheel can support the tilted bicycle body, preventing the bicycle body from tilting too much and causing it to tip over; in addition, the bottom of the balance wheel tilts outward, which can increase the range of support of the balance wheel.

[0009] Optionally, an external brake assembly is provided at a position away from the tilting arm on the mounting shaft. The balance wheel can slide along the length of the mounting shaft. The external brake assembly includes an outer mounting ring disposed at the end of the mounting shaft away from the tilting arm, an outer spring disposed on the side of the outer mounting ring near the balance wheel, an outer brake disc slidably sleeved on the mounting shaft, and an outer brake pad disposed on the side of the balance wheel near the outer mounting ring and cooperating with the outer brake disc. The side of the outer spring away from the outer mounting ring is connected to the outer brake disc.

[0010] By adopting the above technical solution, after adjusting the balance wheel to a state where its bottom is turned outward, if the bicycle body tilts excessively due to improper operation by a child, the bottom of the tilted balance wheel will contact the ground, and the ground will exert a pushing force on the balance wheel. When the pushing force pushes the balance wheel closer to the outer mounting ring, the outer brake pads gradually come into contact with the outer brake disc, which can increase the friction between the outer brake pads and the outer brake disc, improve the braking effect of the balance wheel, and reduce dangerous situations caused by children forgetting to use the brakes on the bicycle body in a panic.

[0011] Optionally, an inner brake assembly is provided on the mounting shaft near the tilting arm. The inner brake assembly includes an inner mounting ring disposed on the end of the mounting shaft near the tilting arm, an inner spring disposed on the side of the inner mounting ring near the balance wheel, an inner connecting ring disposed on the end of the inner spring away from the inner mounting ring, an inner brake disc rotatably connected to the side of the inner connecting ring away from the inner spring and connected to the balance wheel, and an inner brake pad disposed on the mounting shaft and located inside the inner brake disc. The inner brake pad cooperates with the inner brake disc.

[0012] By adopting the above technical solution, the component of the thrust along the length of the mounting shaft will push the balance wheel away from the tilting arm, so that the inner brake disc gradually contacts the inner brake pad. Since the contact surface between the inner brake disc and the inner brake pad is rough and has several rubber protrusions, the friction between the inner brake disc and the inner brake pad can be increased, thereby achieving the braking effect.

[0013] Optionally, the outer brake disc has a plurality of rubber blocks on its inner side, the ends of the rubber blocks are rounded, and the outer brake pad has a plurality of external adapter grooves on its outer periphery that are adapted to the rubber blocks.

[0014] By adopting the above technical solution, when the outer brake pad is inserted into the outer brake disc, due to the setting of the rubber block and the adapter groove, when the outer brake pad rotates, the rubber block is deformed, which can play a braking role on the outer brake pad.

[0015] Optionally, the inner side of the inner brake disc is provided with a friction ring that mates with the outer periphery of the inner brake pad, and the inner periphery of the friction ring is provided with a plurality of friction strips, the inner diameter of the friction ring gradually decreasing along the direction close to the inner connecting ring.

[0016] By adopting the above technical solution, as the inner brake disc gradually approaches the inner brake pad, and when the outer periphery of the inner brake pad contacts the friction strip and friction ring, the friction force between the inner brake pad and the inner brake disc can be increased, thereby improving the braking effect.

[0017] Optionally, the inner brake pads and the inner brake disc are each provided with a number of rubber protrusions on the side where they are close to each other.

[0018] By adopting the above technical solution, the inner brake disc gradually comes into contact with the inner brake pad. Since several rubber protrusions are set between the inner brake disc and the inner brake pad, the friction between the inner brake disc and the inner brake pad is increased.

[0019] Optionally, the adjusting component is a screw, and the frame at the rear of the bicycle body has several threaded holes, with the screw passing through the connecting arm and the threaded holes.

[0020] By adopting the above technical solution, when it is necessary to adjust the height of the connecting arm, the height of the connecting arm can be adjusted simply by removing the screw, which is easy to operate.

[0021] Optionally, a groove is provided at the rear frame of the bicycle body, a slider is provided at one end of the connecting arm that slides in cooperation with the groove, and a threaded hole is provided in the groove.

[0022] By adopting the above technical solution, the slider and the groove are designed to limit the connection arm when adjusting its height, which facilitates the rapid adjustment of the connection arm.

[0023] Optionally, the angle adjustment assembly includes an arc-shaped plate disposed on one end of the connecting arm near the tilting arm and a clamping component disposed on the arc-shaped plate. The arc-shaped plate has an arc-shaped groove along the hinge of the connecting arm. The tilting arm has an oblong hole corresponding to the position of the arc-shaped groove for the clamping component to pass through. The side wall of the arc-shaped groove has a plurality of snap-fit ​​grooves. When the clamping component passes through the snap-fit ​​grooves, the clamping component is used to clamp the tilting arm and the arc-shaped plate.

[0024] By adopting the above technical solution, when the clamping component passes through the arc groove, the tilt angle of the tilting arm can be adjusted, and when the clamping component passes through the snap-fit ​​groove, the tilting arm can be fixed.

[0025] Optionally, the clamping component includes a telescopic rod passing through the waist-shaped hole, end plates disposed at both ends of the telescopic rod, and a clamping spring disposed between the two end plates.

[0026] By adopting the above technical solution, when it is necessary to adjust the angle of the tilting arm, the two end plates are moved away from each other, the telescopic rod is pushed into the arc groove, and the telescopic rod is pushed into the corresponding snap-fit ​​groove. Under the action of the clamping spring, the two end plates clamp the arc plate and the tilting arm respectively, thus completing the fixation of the tilting arm.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. When a child needs to quickly get rid of the balance wheel's balancing aid, the tilt angle of the tilt arm can be adjusted using the angle adjustment component, causing the balance wheel to lift off the ground, thus making it easier for the child to regain balance quickly. When the bicycle tilts due to improper operation by the child, the balance wheel can support the tilted bicycle body, preventing the bicycle body from tilting too much and causing it to tip over;

[0029] 2. After adjusting the balance wheel to its outward-tilted position, if the bicycle body tilts excessively due to improper operation by a child, the bottom of the tilted balance wheel will contact the ground, and the ground will exert a pushing force on the balance wheel. When the pushing force pushes the balance wheel closer to the outer mounting ring, the outer brake pads will gradually come into contact with the outer brake disc, which can increase the friction between the outer brake pads and the outer brake disc, improve the braking effect of the balance wheel, and reduce the danger caused by the child forgetting to use the brakes on the bicycle body in a panic. Attached Figure Description

[0030] Figure 1 This is an illustration of a comfortable and lightweight children's bicycle;

[0031] Figure 2 This is a schematic diagram of the angle adjustment components for a comfortable and lightweight children's bicycle;

[0032] Figure 3 This is a schematic diagram of the inner and outer brake components of a comfortable and lightweight children's bicycle;

[0033] Figure 4 This is a cross-sectional view of the mounting shaft of a comfortable and lightweight children's bicycle.

[0034] Explanation of reference numerals in the attached drawings: 1. Bicycle body; 2. Connecting arm; 3. Tilt arm; 4. Mounting shaft; 5. Balance wheel; 6. Adjusting component; 7. Slide groove; 8. Slider; 9. Threaded hole; 10. Arc plate; 11. Arc groove; 12. Snap-fit ​​groove; 13. Waist-shaped hole; 14. Telescopic rod; 15. End plate; 16. Clamping spring; 17. Pull plate; 18. Inner brake disc; 19. Inner brake pad; 20. Rubber protrusion; 21. Inner mounting ring; 22. Inner spring; 23. Inner connecting ring; 24. Connecting cylinder; 25. Friction ring; 26. Outer mounting ring; 27. Outer spring; 28. Outer brake disc; 29. ​​Outer brake pad; 30. Adaptor groove; 31. Rubber block. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0036] This application discloses a comfortable and lightweight children's bicycle. (See also...) Figure 1 The comfortable and lightweight children's bicycle includes a bicycle body 1 and two balancing mechanisms. The bicycle body 1 includes a frame and front and rear wheels respectively mounted on the front and rear parts of the frame. The two balancing mechanisms are respectively mounted on the left and right sides of the rear frame of the bicycle body 1. In this embodiment, the frame is made of lightweight magnesium alloy. Magnesium alloy is the lightest engineering metal material, an alloy composed of magnesium as a base and other elements, which has the advantages of low density, high elasticity, and good shock absorption.

[0037] The balancing mechanism includes a connecting arm 2, a tilting arm 3, an angle adjustment assembly, a mounting shaft 4, and a balance wheel 5. The connecting arm 2 is mounted on the frame at the rear of the bicycle body 1 via an adjusting member 6. The connecting arm 2 is horizontally positioned. The tilting arm 3 is hinged to the end of the connecting arm 2 away from the bicycle body 1 and is tilted. The angle adjustment assembly is installed between the connecting arm 2 and the tilting arm 3 and is used to adjust the angle between the connecting arm 2 and the tilting arm 3. The mounting shaft 4 is welded to the end of the tilting arm 3 away from the connecting arm 2, and the balance wheel 5 is rotatably mounted on the outside of the mounting shaft 4.

[0038] In the initial state, the length direction of the mounting shaft 4 is parallel to the length direction of the connecting arm 2, and both the balance wheel 5 and the rear wheel of the bicycle body 1 are in contact with the ground. At this time, the balance wheel 5 can support the left and right sides of the bicycle body 1, making it less likely for the bicycle body 1 to tip over. When a child needs to quickly get rid of the balance wheel 5's balance assistance, the tilt angle of the tilt arm 3 can be adjusted through the angle adjustment component, causing the end of the tilt arm 3 near the mounting shaft 4 to tilt upwards, thus lifting the balance wheel 5 off the ground, making it easier for the child to quickly regain balance. If the bicycle body 1 tilts to the left or right due to improper operation by the child, the corresponding balance wheel 5 can support the tilted bicycle body 1, preventing the bicycle body 1 from tilting too much and causing it to tip over. The bottom of the balance wheel 5 tilts outwards, which can increase the range of support of the balance wheel 5.

[0039] Reference Figure 2 Specifically, a vertical groove 7 is provided at the rear frame of the bicycle body 1. The groove 7 is T-shaped. A slider 8 is fixed at the end of the connecting arm 2 away from the tilting arm 3. The slider 8 is also T-shaped and slidably connected within the groove 7. In this embodiment, the adjusting element 6 is a screw. Several threaded holes 9 are provided at the rear frame of the bicycle body 1. The threaded holes 9 are located within the groove 7 and are arranged vertically. The screw passes through the slider 8 and the threaded holes 9.

[0040] When the height of the balance wheel 5 needs to be adjusted, loosen the screw and adjust the height of the connecting arm 2 so that the slider 8 slides within the groove 7. After the slider 8 slides to the desired position, pass the screw through the slider 8 and the threaded hole 9 to fix the connecting arm 2. The slider 8 and the groove 7 are designed to limit the movement of the connecting arm 2 when adjusting its height, facilitating rapid adjustment of the connecting arm 2.

[0041] Specifically, the angle adjustment assembly includes an arc-shaped plate 10 and a clamping component. The arc-shaped plate 10 is fixed to one end of the connecting arm 2 near the tilting arm 3. The clamping component is installed between the arc-shaped plate 10 and the tilting arm 3. The arc-shaped plate 10 has an arc-shaped groove 11 extending through both sides. The arc-shaped groove 11 is arc-shaped and has the same center as the hinge point of the connecting arm 2. The side wall of the arc-shaped groove 11 has several locking grooves 12 arranged in an arc shape. The tilting arm 3 has a waist-shaped hole 13 corresponding to the position of the arc-shaped groove 11. The length direction of the waist-shaped hole 13 is parallel to the length direction of the tilting arm 3, and the clamping component passes through the waist-shaped hole 13. In addition, the clamping component can also pass through the arc-shaped groove 11 and the locking grooves 12. When the clamping component passes through the arc-shaped groove 11, the tilt angle of the tilting arm 3 can be adjusted. When the clamping component passes through the locking groove 12, the tilting arm 3 can be fixed.

[0042] Specifically, the clamping components include a telescopic rod 14, end plates 15, and a clamping spring 16. The telescopic rod 14 passes through the oblong hole 13 and the arc-shaped groove 11. The two end plates 15 are fixed to the opposite ends of the telescopic rod 14, and the two ends of the clamping spring 16 are fixed to the sides of the two end plates 15 that are close to each other. The clamping spring 16 is sleeved on the outside of the telescopic rod 14. In addition, when the two end plates 15 are in contact with the arc-shaped plate 10 and the inclined arm 3, the clamping spring 16 is in a stretched state.

[0043] When the angle of the tilt arm 3 needs to be adjusted, the two end plates 15 are moved away from each other, and the telescopic rod 14 is pushed into the arc-shaped groove 11. The tilt arm 3 is rotated to adjust the tilt angle as needed, and then the telescopic rod 14 is pushed into the corresponding snap-fit ​​groove 12. Under the action of the clamping spring 16, the two end plates 15 clamp the arc-shaped plate 10 and the tilt arm 3 respectively, thereby completing the fixation of the tilt arm 3. It should be noted that the height and angle of the balance wheel 5 can be adjusted only by the angle adjustment component. With this adjustment method, the balance wheel 5 can be adjusted to a tilted state, so that the bottom of the balance wheel 5 tilts outward. When the bicycle body 1 tilts slightly, the tilted balance wheel 5 can increase the distance between the bottom of the rear wheel and the bottom of the balance wheel 5, thereby improving the support range.

[0044] Furthermore, a pull plate 17 is fixed to the end of the end plate 15 away from the telescopic rod 14. The pull plate 17 is designed to facilitate pulling the end plate 15 and to move the two end plates 15 away from each other.

[0045] Reference Figure 3 and Figure 4Preferably, an inner brake assembly is installed on the mounting shaft 4 near the tilting arm 3. The inner brake assembly includes an inner brake disc 18 and an inner brake pad 19. Four connecting rods are fixed to one end of the balance wheel 5 near the tilting arm 3. The inner brake disc 18 is fixedly connected to the balance wheel 5 through the four connecting rods. The inner brake pad 19 is fixed to the outside of the mounting shaft 4. The inner brake pad 19 is located between the balance wheel 5 and the inner brake disc 18, and the inner brake pad 19 cooperates with the inner brake disc 18. In addition, several rubber protrusions 20 are installed on the side of the inner brake pad 19 and the inner brake disc 18 that are close to each other. The rubber protrusions 20 are hemispherical and have a certain degree of elasticity. The inner brake assembly also includes an inner mounting ring 21, an inner spring 22, and an inner connecting ring 23. The inner mounting ring 21 is fixed to the outside of the mounting shaft 4 and is located on the side of the inner brake disc 18 away from the balance wheel 5. The inner spring 22 is fixed to the side of the inner mounting ring 21 near the inner brake disc 18 and is sleeved on the outside of the mounting shaft 4. The inner connecting ring 23 is fixed to the side of the inner spring 22 away from the inner mounting ring 21 and is slidably connected to the mounting shaft 4. A connecting cylinder 24 is fixed to the side of the inner connecting ring 23 near the inner brake disc 18, and the connecting cylinder 24 is rotatably connected to the outside of the inner brake disc 18. Furthermore, it should be noted that the balance wheel 5 can slide slightly along the length of the mounting shaft 4.

[0046] After adjusting the balance wheel 5 to its outward-tilted position, if the bicycle body 1 tilts excessively due to improper operation by a child, the bottom of the tilted balance wheel 5 will contact the ground, and the ground will exert a pushing force on the balance wheel 5. The component of this pushing force along the length of the mounting shaft 4 will push the balance wheel 5 away from the tilting arm 3, causing the inner brake disc 18 to gradually contact the inner brake pad 19. Since the contact surface between the inner brake disc 18 and the inner brake pad 19 is rough and has several rubber protrusions 20, the friction between the inner brake disc 18 and the inner brake pad 19 can be increased, thereby achieving a braking effect and reducing the risk of danger caused by a child forgetting to use the brakes on the bicycle body 1 in a panicked state.

[0047] Furthermore, a friction ring 25 is fixed on the inner side of the inner brake disc 18. The friction ring 25 is arranged in a ring shape. The inner circumferential surface of the friction ring 25 mates with the outer circumferential surface of the inner brake pad 19. The inner diameter of the friction ring 25 gradually decreases along the direction close to the inner connecting ring 23. Several friction strips are fixed circumferentially on the inner circumferential surface of the friction ring 25. Both the friction ring 25 and the friction strips are made of rubber material.

[0048] As the inner brake disc 18 gradually approaches the inner brake pad 19, when the outer periphery of the inner brake pad 19 contacts the friction strip and friction ring 25, the friction between the inner brake pad 19 and the inner brake disc 18 is increased, thus improving the braking effect. Furthermore, as the inner diameter of the friction ring 25 gradually decreases, the friction between the outer periphery of the inner brake pad 19 and the friction strip and friction ring 25 increases, further improving the braking effect.

[0049] Preferably, an outer brake assembly is installed on the mounting shaft 4 away from the tilting arm 3. The outer brake assembly includes an outer mounting ring 26, an outer spring 27, an outer brake disc 28, and an outer brake pad 29. The outer mounting ring 26 is fixed to the outside of the mounting shaft 4, located at the end of the mounting shaft 4 away from the tilting arm 3. The outer spring 27 is fixed to the side of the outer mounting ring 26 near the balance wheel 5. The outer brake disc 28 is slidably sleeved on the outside of the mounting shaft 4. The end of the outer spring 27 away from the outer mounting ring 26 is fixed to the outer brake disc 28. The outer brake pad 29 is fixed to the side of the balance wheel 5 near the outer brake disc 28 through a mounting sleeve, and the outer brake pad 29 and the outer brake disc 28 cooperate with each other. It should be noted that the sides of the outer brake pad 29 and the outer brake disc 28 that are close to each other are roughened and each is equipped with several rubber protrusions 20.

[0050] When the thrust pushes the balance wheel 5 close to the outer mounting ring 26, the outer brake pad 29 gradually comes into contact with the outer brake disc 28. Due to the arrangement of several rubber protrusions 20, the friction between the outer brake pad 29 and the outer brake disc 28 is increased, further improving the braking effect of the balance wheel 5. In addition, due to the arrangement of the outer spring 27 and the inner spring 22, the inner spring 22 and the outer spring 27 can play a certain role in cushioning when the balance wheel 5 contacts the ground in an inclined state.

[0051] Furthermore, the outer brake pad 29 has several fitting grooves 30 on its outer circumferential surface. The fitting grooves 30 are arranged around the circumference of the outer brake pad 29, and the cross-section of the fitting grooves 30 is arc-shaped. Several rubber blocks 31 are fixed inside the outer brake disc 28. The ends of the rubber blocks 31 are rounded. The rubber blocks 31 are arranged around the circumference of the outer brake disc 28, and the outer rubber blocks 31 fit into the fitting grooves 30.

[0052] When the outer brake pad 29 extends into the outer brake disc 28, due to the setting of the rubber block 31 and the adapter groove 30, when the outer brake pad 29 rotates, the elastic rubber block 31 contacts the outer wall of the adapter groove 30 and causes the rubber block 31 to deform, which can play a braking role on the outer brake pad 29 and further improve the braking effect of the balance wheel 5.

[0053] To limit the sliding of the outer brake disc 28, a limiting groove is formed on the outer side of the mounting shaft 4 along its length, and a limiting block is fixed to the inner side of the outer brake disc 28 and slidably connected to the limiting groove. This arrangement ensures that the outer brake disc 28 can only slide along the length of the mounting shaft 4 and cannot rotate.

[0054] In this embodiment, the inner brake disc 18, inner brake pad 19, outer brake disc 28, and outer brake pad 29 are all made of ceramic-based brake material, which is mainly made of reinforcing fibers, mineral fillers, binders, etc. through production and processing.

[0055] It should be noted that when the balance wheel 5 is in contact with the ground in a vertical state, the inner brake disc 18 does not contact the inner brake pad 19 and the outer brake disc 28 does not contact the outer brake pad 29 due to the restriction effect of the inner spring 22 on the inner brake disc 18 and the balance wheel 5, thus allowing the balance wheel 5 to rotate normally.

[0056] The implementation principle of a comfortable and lightweight children's bicycle according to this application embodiment is as follows: In the initial state, both the balance wheel 5 and the rear wheel of the bicycle body 1 are in contact with the ground. The balance wheel 5 can support the left and right sides of the bicycle body 1, making it less likely for the bicycle body 1 to tip over. When the child needs to quickly get rid of the balance wheel 5's balance assistance, the tilt angle of the tilt arm 3 can be adjusted by the angle adjustment component, causing the end of the tilt arm 3 near the mounting shaft 4 to tilt up, so that the balance wheel 5 leaves the ground, making it easier for the child to quickly regain balance. If the bicycle body 1 tilts to the left or right due to improper operation by the child, the corresponding balance wheel 5 can support the tilted bicycle body 1, preventing the bicycle body 1 from tilting too much and causing it to tip over.

[0057] After adjusting the balance wheel 5 to its outward-tilted position, if the bicycle body 1 tilts excessively due to improper operation by the child, the bottom of the tilted balance wheel 5 will contact the ground, and the thrust will push the balance wheel 5 away from the tilt arm 3, so that the inner brake disc 18 gradually contacts the inner brake pad 19. This can increase the friction between the inner brake disc 18 and the inner brake pad 19, thereby improving the braking effect and reducing the risk of dangerous situations caused by children forgetting to use the brakes on the bicycle body 1 in a panic.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A comfortable and lightweight children's bicycle, characterized in that: The bicycle body (1) includes a bicycle body (1) and a balance mechanism located on both sides of the rear of the bicycle body (1). The balance mechanism includes a connecting arm (2) located on the frame at the rear of the bicycle body (1) via an adjusting member (6), a tilting arm (3) hinged to one end of the connecting arm (2), a mounting shaft (4) located at one end of the tilting arm (3), an angle adjustment component located on the connecting arm (2) and used to adjust the tilt angle of the tilting arm (3), and a balance wheel (5) rotatably located on the mounting shaft (4). The height adjustment component is used to adjust the height of the connecting arm (2). An external brake assembly is provided at a position away from the tilting arm (3) on the mounting shaft (4). The balance wheel (5) can slide along the length direction of the mounting shaft (4). The external brake assembly includes an external mounting ring (26) located at one end of the mounting shaft (4) away from the tilting arm (3), an external spring (27) located on the side of the external mounting ring (26) near the balance wheel (5), an external brake disc (28) slidably sleeved on the mounting shaft (4), and an external brake pad (29) located on the side of the balance wheel (5) near the external mounting ring (26) and cooperating with the external brake disc (28). The side of the external spring (27) away from the external mounting ring (26) is connected to the external brake disc (28). An inner brake assembly is provided on the mounting shaft (4) near the tilting arm (3). The inner brake assembly includes an inner mounting ring (21) located on the mounting shaft (4) near the tilting arm (3), an inner spring (22) located on the inner mounting ring (21) near the balance wheel (5), an inner connecting ring (23) located on the inner spring (22) away from the inner mounting ring (21), an inner brake disc (18) rotatably connected to the inner connecting ring (23) away from the inner spring (22) and connected to the balance wheel (5), and an inner brake pad (19) located on the mounting shaft (4) and inside the inner brake disc (18). The inner brake pad (19) cooperates with the inner brake disc (18). The inner brake disc (18) is provided with a friction ring (25) that mates with the outer circumference of the inner brake pad (19). The friction ring (25) is provided with several friction strips on its inner circumference. The inner diameter of the friction ring (25) gradually decreases along the direction close to the inner connecting ring (23). Several rubber protrusions (20) are provided on the side of the inner brake pad (19) and the inner brake disc (18) that are close to each other; The outer brake disc (28) has several rubber blocks (31) on its inner side, and the ends of the rubber blocks (31) are rounded. The outer brake pad (29) has several external adapter grooves (30) that are adapted to the rubber blocks (31) on its outer periphery. The angle adjustment assembly includes an arc plate (10) disposed on one end of the connecting arm (2) near the tilting arm (3) and a clamping component disposed on the arc plate (10). The arc plate (10) has an arc groove (11) with an arc shape along the hinge of the connecting arm (2). The tilting arm (3) has a waist-shaped hole (13) for the clamping component to pass through at the position corresponding to the arc groove (11). The side wall of the arc groove (11) has a number of snap-fit ​​grooves (12). When the clamping component passes through the snap-fit ​​grooves (12), the clamping component is used to clamp the tilting arm (3) and the arc plate (10). The clamping component includes a telescopic rod (14) passing through the waist-shaped hole (13), end plates (15) disposed at both ends of the telescopic rod (14), and a clamping spring (16) disposed between the two end plates (15).

2. The comfortable and lightweight children's bicycle according to claim 1, characterized in that: The adjusting component (6) is a screw. The frame at the rear of the bicycle body (1) has several threaded holes (9). The screw passes through the connecting arm (2) and the threaded holes (9).

3. A comfortable and lightweight children's bicycle according to claim 2, characterized in that: The bicycle body (1) has a groove (7) at the rear frame, and a slider (8) is provided at one end of the connecting arm (2) to slide in the groove (7). The threaded hole (9) is opened in the groove (7).

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