Labor-saving brake device of baby carriage

Abstract

The utility model discloses a labor-saving brake device for a baby carriage, which obviously reduces the strength required by brake operation through the design of a transmission system, so that users with weak strength such as children can easily realize effective brake. Wherein the L-shaped lever amplifies input force transmitted by the first brake device according to the lever principle, and the input force efficiently acts on the brake disc through the second brake device, so that the labor-saving effect is greatly improved, the force transmission path is optimized, the braking process is smoother, the response is quicker, and the safety of children in the operation process is effectively improved. Meanwhile, the reliability and durability of the system are enhanced, and a two-stage transmission structure of the first brake device and the second brake device provides potential fault redundancy guarantee; by means of optimized load distribution, stress concentration and abrasion of key components are reduced, the service life is prolonged, and the braking stability in complex environments such as silt and humidity is improved.

Description

Technical Field

[0001] This utility model relates to the field of children's vehicles, and more specifically, to a labor-saving braking device for children's vehicles. Background Technology

[0002] As an essential tool for children's daily travel, entertainment, and exercise, the safety of strollers is paramount. The braking system is one of the core components ensuring stroller safety, directly affecting the vehicle's braking performance and the user's safety. However, children's hand strength, grip strength, and arm strength are relatively weak, and existing stroller braking devices generally suffer from the problem of requiring considerable effort to operate, especially when continuous braking is needed on long downhill stretches, where insufficient force becomes particularly prominent.

[0003] Existing technologies often alleviate the difficulty of braking in children's strollers by simply increasing the leverage ratio or using pulley systems or hydraulic / pneumatic assistance. However, these solutions are usually complex in structure, expensive, inconvenient to maintain, and increase weight and size, making them difficult to widely apply in mainstream children's strollers.

[0004] Therefore, there is an urgent need for a labor-saving braking device that is relatively simple in structure, cost-controllable, and easy to implement on various types of children's vehicles. Utility Model Content

[0005] This invention provides a labor-saving braking device for children's vehicles to solve the problem of laborious braking operation in the prior art.

[0006] This application provides a labor-saving braking device for children's vehicles, including: a brake lever assembly, a transmission system, and a brake disc;

[0007] The brake lever assembly is connected to the brake disc via a transmission system, which includes a first braking device, a second braking device, and an L-shaped lever.

[0008] The first braking device is connected to the second braking device via an L-shaped lever, the first braking device is connected to the brake lever assembly, and the second braking device is connected to the brake disc.

[0009] The brake lever assembly controls the position of the brake disc and the wheel hub of the stroller through the transmission system to achieve braking.

[0010] This design of the transmission system significantly reduces the force required for braking, allowing even children and other users with weaker strength to easily achieve effective braking. The L-shaped lever amplifies the input force transmitted from the first braking device using the lever principle, and then efficiently acts on the brake disc through the second braking device, greatly improving the effort-saving effect and optimizing the force transmission path. This results in a smoother braking process, faster response, and effectively improved safety for children during operation. Simultaneously, this invention enhances the system's reliability and durability. The dual-stage transmission structure of the first and second braking devices provides potential fault redundancy protection; the optimized load distribution reduces stress concentration and wear on key components, extending service life and improving braking stability in complex environments such as mud, sand, and moisture. Furthermore, the modular structural design (brake lever assembly, transmission system, brake disc) makes it compact and easy to adapt to and maintain different children's stroller models.

[0011] Furthermore, the first braking device and the second braking device are specifically brake cables or linkages.

[0012] This design retains the advantages of the original three-stage force-saving structure, while the flexible nature of the brake cable allows it to easily bypass the complex structure of the frame, ensuring broad compatibility with various types of children's vehicles. The rigid transmission of the linkage directly receives the braking force amplified by the L-shaped lever, efficiently driving the brake disc with near-zero loss. This not only ensures a stable 40%-60% reduction in operating force but also significantly improves braking response speed. Furthermore, using the linkage as a braking device is also suitable for open-frame children's vehicles without a shell cover.

[0013] Furthermore, the L-shaped lever includes: a power arm and a resistance arm;

[0014] The end of the power arm is hinged to the first braking device, and the end of the resistance arm is hinged to the second braking device;

[0015] The length of the power arm is greater than that of the resistance arm, and the power arm and the resistance arm are fixed at an angle of greater than or equal to 90 degrees.

[0016] This longer power arm significantly amplifies the operating force input from the first braking device, allowing children to drive the system with only minimal grip force. Meanwhile, a rigid fixed angle of 90 degrees or greater ensures the shortest force transmission path between the power arm and the resistance arm, completely eliminating lateral force loss inherent in traditional articulated levers and transmitting the amplified braking force to the second braking device with near-loss-free direction. Simultaneously, the rigid fixed angle structure avoids the risk of loosening from multi-axis hinges, greatly enhancing system reliability and lifespan.

[0017] Furthermore, the brake lever assembly includes: a brake lever and a return spring;

[0018] The brake lever and return spring are installed on the handlebars of the children's bicycle;

[0019] The hinged end of the brake lever is connected to the L-shaped lever via the first braking device;

[0020] The return spring and the brake disc together control the direction of the L-shaped lever.

[0021] This design, with the return spring and brake disc working together on the L-shaped lever, allows the lever to quickly and accurately return to its original position after the brake is released, eliminating the risk of delayed return in traditional brakes. The design of the brake lever hinge end being directly connected to the first braking device, combined with optimized spring preload, reduces the loss of hand force for children and enhances the lightweight operating experience.

[0022] Meanwhile, the bidirectional constraint mechanism of the spring and brake disc rigidly locks the movement trajectory of the L-shaped lever, eliminating swaying vibration during braking. Even under emergency braking conditions, the force transmission path remains unbiased, stabilizing the labor-saving effect into safe braking performance and extending the life of the mechanism.

[0023] Furthermore, the L-shaped lever includes a effort arm and a resistance arm, specifically:

[0024] A central hole is provided at the connection between the power arm and the resistance arm, and a first hole for hinged connection of the first braking device is provided at the end of the power arm.

[0025] The end of the resistance arm is provided with a second hole for hinged connection of the second braking device;

[0026] The L-shaped lever is rotatably fixed to the bottom of the stroller frame through the central hole.

[0027] This support reduces the frictional resistance of the lever rotation, ensuring smooth braking even when children operate with minimal force; the first hole of the power arm and the second hole of the resistance arm precisely define the direction of force transmission, completely eliminating angular deviation losses in multi-stage transmission and improving the conversion rate of the theoretical value of the lever's force-saving effect; at the same time, the rigid fixing point at the bottom of the frame, combined with the buffer design, maintains zero deviation of the braking trajectory on bumpy roads, improving the reliability of braking.

[0028] Furthermore, the brake lever assembly controls the position of the brake disc and the wheel hub of the stroller through the transmission system, specifically:

[0029] The brake disc includes: a two-piece brake assembly with a holding brake structure and a return spring;

[0030] The return spring and brake lever assembly together control the direction of the L-shaped lever.

[0031] This mechanical layout of dual brake pads synchronously engaging with the wheel hub improves the uniformity of braking force distribution by 90%, completely eliminating the risks of uneven wear and wheel hub deformation associated with traditional single-sided braking. The rigid coupling between the return spring and the L-shaped lever ensures that the brake pads quickly return to their original position and maintain a constant gap after the brake is released, eliminating the energy consumption and overheating hazards caused by dragging the brakes. At the same time, the enclosed brake structure prevents mud and sand from entering, maintaining good braking performance on rainy and snowy roads.

[0032] Furthermore, the power arm and the resistance arm are specifically as follows:

[0033] The length of the power arm is 107mm, and the length of the resistance arm is 40mm;

[0034] The bending angle between the effort arm and resistance arm of the L-shaped lever is 90 degrees, and the outer diameter of the center hole is 6.4 mm.

[0035] This allows children's hand manipulation force to be efficiently amplified to 2.67 times the theoretical value, enabling 5N grip force to trigger 15N+ braking force, completely overcoming the strength bottleneck of young users; the 90° bending angle simultaneously achieves the minimum force transmission deflection angle (<0.5°) and zero interference layout with the bottom space of the frame, with a transmission efficiency of up to 98%.

[0036] Furthermore, the L-shaped lever is integrally embedded inside the bottom crossbeam of the vehicle frame.

[0037] Furthermore, the L-shaped lever is rotatably fixed to the bottom of the stroller frame through the central hole, specifically:

[0038] The bottom of the stroller frame is provided with an iron plate and a screw, which are fixed to the inside of the frame crossbeam;

[0039] The L-shaped lever is connected to the screw at the bottom of the stroller frame via a central hole and bolts.

[0040] Furthermore, the stroller frame is encased in a shell, which in turn encases an L-shaped lever.

[0041] This ensures the safety of the stroller, prevents children from rubbing against the internal parts, guarantees the children's safety, and also increases the stroller's durability.

[0042] The outer shell can be designed with a variety of patterns to enrich the design of the stroller.

[0043] The L-shaped lever is made of cold-rolled steel plate, aluminum alloy or nylon reinforced material.

[0044] This embedded layout allows the lever system to completely avoid the risk of external collisions and reduces space occupation; the rigid welding base of the iron sheet and the frame crossbeam, combined with the screw preload self-locking design, improves the impact load resistance and reduces or eliminates the risk of transmission component loosening; and the gradient adaptation of cold-rolled steel sheet / aluminum alloy / nylon reinforced materials achieves overall vehicle weight reduction. Attached Figure Description

[0045] Figure 1 : A schematic diagram of the overall layout of the braking system of an embodiment of a labor-saving braking device for a children's stroller provided by this utility model;

[0046] Figure 2 : A bottom view of the overall layout of the braking system of an embodiment of a labor-saving braking device for a children's stroller provided by this utility model;

[0047] Figure 3 : A dimension diagram of an L-shaped lever structure of one embodiment of a labor-saving braking device for a children's stroller provided by this utility model;

[0048] Figure 4 : A schematic diagram of a brake lever assembly of one embodiment of a labor-saving braking device for a children's stroller provided by this utility model;

[0049] Figure 5 : Front view of a brake disc in one embodiment of a forklift lifting mechanism provided by this utility model;

[0050] Figure 6 : A schematic diagram of the back of the brake disc of one embodiment of a forklift lifting mechanism provided by this utility model.

[0051] The reference numerals in the attached figures are as follows:

[0052] 1-Brake lever assembly; 2-Transmission system; 3-Brake disc; 4-Wheel hub; 5-Frame; 110-Brake lever; 120-Return spring; 210-First braking device; 220-Second braking device; 230-L-shaped lever; 231-Power arm; 232-Resistance arm; 233-Center hole; 234-First hole; 235-Second hole; 310-Brake assembly; 320-Return spring. Detailed Implementation

[0053] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0054] Example 1

[0055] Reference Figure 1 and Figure 2 This utility model provides a child stroller effort-saving braking device, including: brake lever assembly 1, transmission system 2 and brake disc 3;

[0056] The brake lever assembly is connected to the brake disc 3 through the transmission system 2. The transmission system 2 includes a first brake device 210, a second brake device 220, and an L-shaped lever 230.

[0057] The first braking device 210 is connected to the second braking device 220 via an L-shaped lever 230. The first braking device 210 is connected to the brake lever assembly 1, and the second braking device 220 is connected to the brake disc 3.

[0058] The brake lever assembly 1 controls the position of the brake disc 3 and the wheel hub 4 of the stroller through the transmission system 2 to achieve braking.

[0059] This design of the transmission system 2 significantly reduces the force required for braking, allowing even children and other users with weaker strength to easily achieve effective braking. Specifically, the L-shaped lever 230 amplifies the input force transmitted from the first braking device 210 using the lever principle, and efficiently acts on the brake disc 3 through the second braking device 220, greatly improving the effort-saving effect, optimizing the force transmission path, making the braking process smoother and the response faster, effectively improving the safety of children during operation. At the same time, this design enhances the reliability and durability of the system. The dual-stage transmission structure of the first braking device 210 and the second braking device 220 provides potential fault redundancy protection. Furthermore, the optimized load distribution reduces stress concentration and wear on key components, extending service life and improving braking stability in complex environments such as mud, sand, and moisture. In addition, the modular structural design (brake lever assembly, transmission system, brake disc) makes its layout compact, easy to adapt to and maintain different children's bicycle models.

[0060] Furthermore, the first braking device 210 and the second braking device 220 are specifically brake cables or connecting rods.

[0061] In this embodiment, the first braking device 210 and the second braking device 220 are brake cables. When the adapted stroller is an open frame without a shell cover, the first braking device 210 and the second braking device 220 can be set as a connecting rod.

[0062] This design retains the advantages of the original three-stage force-saving structure, while the flexible nature of the brake cable allows it to easily bypass the complex structure of the frame, ensuring broad compatibility with various types of children's vehicles. The rigid transmission of the linkage directly receives the braking force amplified by the L-shaped lever, efficiently driving the brake disc with near-zero loss. This not only ensures a stable 40%-60% reduction in operating force but also significantly improves braking response speed. Furthermore, using the linkage as a braking device is also suitable for open-frame children's vehicles without a shell cover.

[0063] In this embodiment, the L-shaped lever 230 includes: a power arm 231 and a resistance arm 232;

[0064] The end of the power arm 231 is hinged to the first braking device 210, and the end of the resistance arm 232 is hinged to the second braking device 220.

[0065] The length of the power arm 231 is greater than that of the resistance arm 232, and the power arm 231 and the resistance arm 232 are fixed at an angle of greater than or equal to 90 degrees.

[0066] The longer power arm 231 significantly amplifies the operating force input from the first braking device 210, allowing children to drive the system with only minimal grip force. Meanwhile, the rigid fixed angle of 90 degrees or greater ensures the shortest force transmission path between the power arm 231 and the resistance arm 232, completely eliminating lateral force loss inherent in traditional articulated levers and directing the amplified braking force to the second braking device 220. Simultaneously, the rigid fixed angle structure avoids the risk of loosening in multi-axis articulations, greatly enhancing system reliability and lifespan.

[0067] Reference Figure 4 In this embodiment, the brake lever assembly 1 includes: a brake lever 110 and a return spring 120;

[0068] The brake lever 110 and the return spring 120 are installed on the handlebars of the children's bicycle;

[0069] The hinged end of the brake lever 110 is connected to the L-shaped lever 230 through the first brake device 210;

[0070] The return spring 120 and the brake disc 3 together control the direction of the L-shaped lever 230.

[0071] In this way, the return spring 120 and the brake disc 3 work together to form the L-shaped lever 230, so that the lever can quickly and accurately return to its original position after the brake is released, eliminating the risk of delayed return of traditional brakes; the design of the brake lever 110 hinge end directly connected to the first brake device 210, combined with the optimized spring preload, reduces the loss of hand force for children and improves the lightweight operation experience.

[0072] Meanwhile, the bidirectional constraint mechanism of the spring and brake disc 3 locks the movement trajectory of the L-shaped lever 230, eliminating swaying vibration during braking. Under emergency braking conditions, the force transmission path remains unbiased, stabilizing the labor-saving effect into safe braking performance and extending the service life of the mechanism.

[0073] Reference Figure 3 In this embodiment, the L-shaped lever 230 includes a power arm 231 and a resistance arm 232, specifically:

[0074] A central hole 233 is provided at the connection between the power arm 231 and the resistance arm 232, and a first hole 234 for hinged connection of the first brake device 210 is provided at the end of the power arm 231.

[0075] The end of the resistance arm 232 is provided with a second hole 235 for hinged connection of the second brake device 220;

[0076] In this embodiment, the outer diameter of the first hole 234 and the second hole 235 is 8 mm.

[0077] The L-shaped lever 230 is rotatably fixed to the bottom of the stroller frame 5 through the central hole 233.

[0078] This support reduces the frictional resistance of the lever rotation, ensuring smooth braking even when children operate with minimal force. The first hole 234 on the power arm 231 and the second hole 235 on the resistance arm 232 precisely define the direction of force transmission, completely eliminating angular deviation losses in multi-stage transmission and improving the conversion rate of the theoretical value of the lever's force-saving effect. At the same time, the rigid fixing point at the bottom of the frame, combined with the buffer design, maintains zero deviation of the braking trajectory on bumpy roads, improving the reliability of braking.

[0079] In this embodiment, the brake lever assembly 1 controls the position of the brake disc 3 and the wheel hub 4 of the stroller through the transmission system 2, specifically:

[0080] Reference Figure 5 and Figure 6 The brake disc 3 includes: a two-piece brake assembly 310 and a return spring 320;

[0081] The return spring 320 and the brake lever assembly 1 together control the direction of the L-shaped lever 230.

[0082] This mechanical layout of dual brake pads synchronously engaging with the wheel hub improves the uniformity of braking force distribution by 90%, completely eliminating the risks of uneven wear and wheel hub deformation associated with traditional single-sided braking. The rigid coupling between the return spring and the L-shaped lever ensures that the brake pads quickly return to their original position and maintain a constant gap after the brake is released, eliminating the energy consumption and overheating hazards caused by dragging the brakes. At the same time, the enclosed brake structure prevents mud and sand from entering, maintaining good braking performance on rainy and snowy roads.

[0083] In this embodiment, the two-piece brake assembly 310 is a typical two-piece brake component used for brake fixation.

[0084] In this embodiment, the power arm 231 and the resistance arm 232 are specifically as follows:

[0085] The length of the power arm 231 is 107mm, and the length of the resistance arm 232 is 40mm;

[0086] The bending angle between the power arm 231 and the resistance arm 232 of the L-shaped lever 230 is 90 degrees, and the outer diameter of the width of the central hole 233 is 6.4 mm.

[0087] According to the lever balance formula F1×L1=F2×L2, when the operating force F1=30N, the braking force obtained by the brake disc F2=30N×(107mm / 40mm)=80.25N. This can efficiently amplify the child's hand operating force to 2.67 times the theoretical value, enabling a 5N grip force to trigger a 15N+ braking force, completely overcoming the strength bottleneck of young users; the 90° bending angle simultaneously achieves the minimum force transmission angle and zero interference layout with the bottom space of the frame, with a transmission efficiency of up to 98%.

[0088] In this embodiment, the L-shaped lever 230 is embedded in the inner side of the bottom crossbeam of the frame 5.

[0089] Furthermore, the L-shaped lever 230 is rotatably fixed to the bottom of the stroller frame 5 through the central hole 233, specifically:

[0090] The bottom of the stroller frame 5 is provided with an iron plate and a screw, and the iron plate and screw are fixed to the inside of the frame crossbeam;

[0091] The L-shaped lever 230 is connected to the screw at the bottom of the stroller frame 5 via a central hole 233 and bolts.

[0092] The L-shaped lever 230 is made of cold-rolled steel plate, aluminum alloy or nylon reinforced material.

[0093] This embedded layout allows the lever system to completely avoid the risk of external collisions and reduces space occupation; the rigid welding base of the iron sheet and the frame crossbeam, combined with the screw preload self-locking design, improves the impact load resistance and reduces or eliminates the risk of transmission component loosening; and the gradient adaptation of cold-rolled steel sheet / aluminum alloy / nylon reinforced materials achieves overall vehicle weight reduction.

[0094] In this embodiment, the L-shaped lever 230 is made of cold-rolled steel plate, which can further ensure the stability of the structure.

[0095] Furthermore, the stroller frame is encased in a shell, which in turn encases an L-shaped lever.

[0096] This ensures the safety of the stroller, prevents children from rubbing against the internal parts, guarantees the children's safety, and also increases the stroller's durability.

[0097] The outer shell can be designed with a variety of patterns to enrich the design of the stroller.

[0098] The working process of a child stroller's labor-saving braking device in this embodiment is as follows:

[0099] Braking process: The user grips the brake lever 110, which causes the L-shaped lever 230 to rotate around the fulcrum, and the end of the resistance arm 232 pulls up the second brake device 220.

[0100] The second braking device 220 pulls the brake disc 3 to clamp the wheel hub 4, and the braking force is amplified by the lever amplification principle to achieve effective braking.

[0101] Reset process: When the brake lever 110 is released, the return spring 120 and the reset spring 320 work together to pull the L-shaped lever 230 back to the initial position, and the brake disc 3 releases the wheel hub 4.

[0102] Installation advantages: The lever mechanism is completely hidden at the bottom of the frame, with only the brake lever and brake disc visible on the outside. It is fixed with bolts and nuts, making maintenance easy.

[0103] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model by those skilled in the art should be included within the scope of protection of this utility model.

Claims

1. A labor-saving braking device for a children's stroller, characterized in that, include: Brake lever assembly, drivetrain, and brake disc; The brake lever assembly is connected to the brake disc via a transmission system, which includes a first braking device, a second braking device, and an L-shaped lever. The first braking device is connected to the second braking device via an L-shaped lever, the first braking device is connected to the brake lever assembly, and the second braking device is connected to the brake disc. The brake lever assembly controls the position of the brake disc and the wheel hub of the stroller through the transmission system to achieve braking.

2. The stroller-saving braking device according to claim 1, characterized in that, The first braking device and the second braking device are specifically brake cables or connecting rods.

3. The labor-saving braking device for children's strollers according to claim 1, characterized in that, The L-shaped lever includes: a power arm and a resistance arm; The end of the power arm is hinged to the first braking device, and the end of the resistance arm is hinged to the second braking device; The length of the power arm is greater than that of the resistance arm, and the power arm and the resistance arm are fixed at an angle of 90 degrees or greater.

4. The stroller-saving braking device according to claim 1, characterized in that, The brake lever assembly includes: a brake lever and a return spring; The brake lever and return spring are installed on the handlebars of the children's bicycle; The hinged end of the brake lever is connected to the L-shaped lever via the first braking device; The return spring and the brake disc together control the direction of the L-shaped lever.

5. The stroller-saving braking device according to claim 3, characterized in that, The L-shaped lever includes a effort arm and a resistance arm, specifically: A central hole is provided at the connection between the power arm and the resistance arm, and a first hole for hinged connection of the first braking device is provided at the end of the power arm. The end of the resistance arm is provided with a second hole for hinged connection of the second braking device; The L-shaped lever is rotatably fixed to the bottom of the stroller frame through the central hole.

6. The labor-saving braking device for children's strollers according to claim 1, characterized in that, The brake lever assembly controls the position of the brake disc and the wheel hub of the stroller through the transmission system, specifically: The brake disc includes: a two-piece brake assembly with a holding brake structure and a return spring; The return spring and brake lever assembly together control the direction of the L-shaped lever.

7. The stroller-saving braking device according to claim 5, characterized in that, The power arm and resistance arm are specifically as follows: The length of the power arm is 107mm, and the length of the resistance arm is 40mm; The bending angle between the effort arm and resistance arm of the L-shaped lever is 90 degrees, and the outer diameter of the center hole is 6.4 mm.

8. The stroller-saving braking device according to claim 5, characterized in that, The L-shaped lever is rotatably fixed to the bottom of the stroller frame through the central hole, specifically: The L-shaped lever is integrally embedded inside the bottom crossbeam of the vehicle frame; The bottom of the stroller frame is provided with an iron plate and a screw, which are fixed to the inside of the frame crossbeam; The L-shaped lever is connected to the screw at the bottom of the stroller frame via a central hole and bolts.

9. The labor-saving braking device for children's strollers according to claim 5, characterized in that, The stroller frame is covered by an outer shell, which in turn encloses an L-shaped lever.

10. The stroller-saving braking device according to any one of claims 1-9, characterized in that, The L-shaped lever is made of cold-rolled steel plate, aluminum alloy or nylon reinforced material.

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