Shock-absorbing intelligent child stroller

Abstract

A shock-absorbing intelligent stroller includes a push rod frame, a front support, a main joint, and a multi-link virtual pivot point shock absorption assembly. The shock absorption assembly includes a shock absorber, a lever, a swing arm, a rear support, and a connecting frame. One end of the lever is connected to a first hinge point of the rear support, the middle is rotatably connected to the connecting frame, and the other end is rotatably connected to the shock absorber. One end of the swing arm is rotatably connected to a second hinge point of the rear support, and the other end is rotatably connected to the connecting frame. The first and second hinge points are staggered in height and front-rear. The intersection of the line connecting the first hinge point and the first pivot point with the line connecting the second hinge point and the second pivot point is a virtual pivot point, which moves towards the direction of the shock absorber's extension and retraction during vibration. The stroller also includes an electrically controlled braking device, including a brake unit acting on the rear wheels, and a control signal input terminal that is communicatively connected to the control signal output terminal of a sensor control device and / or an identification device. This invention effectively absorbs the impact of road bumps, providing high safety and intelligent braking.

Description

Technical Field

[0001] This invention relates to the field of children's strollers, and more specifically to a shock-absorbing smart children's stroller with intelligent braking and recognition functions. Background Technology

[0002] With social progress and the improvement of people's living standards, higher demands are being placed on the performance value and safety reliability of goods.

[0003] As an essential tool for children's travel, strollers have become increasingly important to consumers, especially for newborns and toddlers. They not only need to be convenient for travel and for adults to care for infants and toddlers, but also need to ensure the safety and comfort of infants and toddlers.

[0004] Currently, the core technology of children's strollers is mainly mechanical strollers, which use mechanical adjustment to achieve various main functions such as pushing, braking, and folding on the basis of a rigid "triangular" frame.

[0005] The main design requirements for most existing children's strollers are as follows: I. The "shock absorption" function of spring-based buffer components This is achieved solely by relying on springs, specifically by setting up "shock-absorbing" wheels or adding springs to the frame. Examples include the multi-functional folding stroller with shock-absorbing omnidirectional wheels disclosed in application number CN88201873.6, and the folding stroller with multi-level shock absorption disclosed in authorization announcement number CN209321035U.

[0006] However, the aforementioned existing technologies can only achieve a certain degree of shock absorption in principle, but cannot effectively achieve the function of shock avoidance.

[0007] "Shock absorption" refers to the absorption or dissipation of impact energy generated during vibration by an energy-absorbing component. This reduces or even eliminates the impact energy on the cabin and frame, effectively absorbing shocks and protecting newborns and infants. Without an energy-absorbing component, relying solely on springs only provides a buffering function. When subjected to external impact, the springs convert the vibration energy caused by road bumps into compression and store it within the spring. After the force is removed, the springs release the energy back to the wheels or frame through rebound.

[0008] In addition, some strollers on the market offer a cabin consisting of an integrated seat and an integrated backrest. The cabin is attached to a bracket or stroller frame with a spring mechanism. The shock absorption effect of this type of stroller needs further research. In other words, the cabin sits directly on the spring and is constantly subjected to the oscillation and impact generated by the compression and rebound of the spring, which cannot ensure the comfort of infants and young children.

[0009] II. Mechanical brakes, such as handbrakes or single / double foot brakes, provide braking functionality. Traditional mechanical braking devices typically brake the rear wheels of strollers. A foot brake is installed on the rear wheel of the frame or on the rear wheel connecting crossbar. The foot brake is connected to a brake component with teeth that engages in the gap between the brake teeth of the rear wheel. Alternatively, a mechanism pushes a spring-driven ejector mechanism to push a brake pin into the brake hole of the rear wheel brake disc to achieve the braking function.

[0010] Patent CN202193108U discloses a braking mechanism for a child stroller. The braking device is located at the lower end of the rear foot tube of the stroller frame. It mainly uses a brake pedal connected to a drive turntable that can rotate in both directions, and pushes the brake unit to move the brake pin back and forth to enter or exit the braking position, thereby achieving the purpose of braking.

[0011] Therefore, it is evident that mechanical braking mechanisms require manual operation or foot braking by the operator to achieve passive braking. On flat roads, the danger of not braking is not significant. However, on steep slopes, if the operator loses control of the stroller without manual braking, such as accidentally releasing the handle, the stroller with mechanical brakes will roll away, potentially causing it to plunge downhill or overturn with the baby inside, resulting in injury to the infant and posing a significant safety hazard.

[0012] III. Unauthorized use without an identity verification system Currently, no matter what style of stroller is available on the market, none of them have the function of identifying the operator's identity. That is, they cannot distinguish whether the current operator has the right to use the stroller, and therefore cannot prevent unsafe or illegal use of the stroller.

[0013] Therefore, how to overcome the shortcomings of the existing technology is the subject of this invention. Summary of the Invention

[0014] The purpose of this invention is to provide a shock-absorbing intelligent children's stroller.

[0015] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A shock-absorbing smart stroller, the frame of which includes a push rod frame, a front support, a main joint, and a multi-link virtual pivot point shock absorption component; The multi-link virtual pivot point shock absorption assembly includes a shock absorber, a lever, a swing arm, a rear support, and a connecting frame; Wherein, the first end of the lever is rotatably connected to the first hinge point of the rear bracket; the middle part of the lever is rotatably connected to a first beam of the connecting frame, forming a first rotation point; the second end of the lever is rotatably connected to a movable end of the shock absorber; The first end of the swing arm is rotatably connected to the second hinge point of the rear bracket, and the second end of the swing arm is rotatably connected to a second beam of the connecting frame, forming a second rotation point; The first hinge point and the second hinge point are staggered in both the height direction and the front-back direction; The shock absorber is positioned in the connecting frame, and its fixed end is rotatably connected to the second beam of the connecting frame. The first beam and the second beam of the connecting frame are relatively fixed. The line connecting the first hinge point and the first rotation point is defined as the first line, the line connecting the second hinge point and the second rotation point is defined as the second line, and the intersection of the first line and the second line is defined as a virtual rotation point; this virtual rotation point tends to move in the direction of shock absorber extension and contraction when the vehicle frame vibrates. It also includes an electronically controlled braking device, at least mounted on the rear wheel axle, including a braking part for the rear wheel axle, and having a control signal input terminal; The control signal input terminal is communicatively connected to the control signal output terminal of a sensing control device and / or the control signal output terminal of an identity recognition device.

[0016] In a further technical solution, the frame has a folded state and an open state, and during the folding or opening process, the push rod frame rotates around the main joint.

[0017] In a further technical solution, the frame also includes a seat unit, which is detachably mounted at the main joint.

[0018] In a further technical solution, the first hinge point is located above the second hinge point and behind the second hinge point.

[0019] In a further technical solution, the rear bracket includes a first support rod and a second support rod, the lower ends of which are fixed together and together serve as the positioning part of the rear wheel; the first hinge point is located at the upper end of the first support rod, and the second hinge point F is located at the upper end of the second support rod.

[0020] In a further technical solution, the shock absorber is vertically arranged, with the upper end being the movable end and the lower end being the fixed end, and the extension and retraction direction of the shock absorber is the up and down direction.

[0021] In a further technical solution, the connection point between the fixed end of the shock absorber and the second beam of the connecting frame is located in front of the second rotation point.

[0022] A further technical solution is provided, wherein the shock absorber includes a damper, a restoring spring, and an outer cover; the damper includes a damping cylinder and a piston rod that is slidably positioned in the damping cylinder and sealed therewith, the piston rod performing reciprocating movements to extend or retract the damping cylinder; the damping cylinder is filled with a damping medium; The end of the damping cylinder serves as the movable end, and the extended end of the piston rod serves as the fixed end; The restoring spring acts between the damping cylinder and the piston rod, and keeps the piston rod in a tendency to extend out of the damping cylinder; The outer cover is divided into two parts that are fitted together, one part covering the outside of the damping cylinder and the other part covering the outside of the piston rod.

[0023] In a further technical solution, the lever is a curved lever, and the first hinge point is higher than the first rotation point; The second rotation point of the swing arm is higher than the second hinge point.

[0024] In a further technical solution, the fixed end of the shock absorber and the rotational connection point of the second beam of the connecting frame are the fourth rotation point, and the rotation amplitude of the shock absorber around the fourth rotation point is less than or equal to 5°.

[0025] Further technical solutions also include a first link, a second link, and a third link; The upper end of the first link is rotatably connected to the lower part of the main joint, and the lower end of the first link is rotatably connected to the rear end of the second link and the front end of the third link. The front end of the second link is rotatably connected to the front bracket, and the rear end of the third link is rotatably connected to the second support rod.

[0026] In a further technical solution, the electrically controlled braking device is an electromagnetic brake; The electromagnetic brake includes a fixed plate, an armature, a pin, a release spring, a magnetic yoke brake disc, a coil, and a bearing; wherein, the fixed plate, armature, pin, and release spring form a rotor, which is mounted on the rear wheel shaft and rotates together with the wheel; the magnetic yoke brake disc and the coil form a stator, which is fixedly mounted on the inner wall of the rear wheel fork.

[0027] In a further technical solution, the sensing control device is mounted on the vehicle frame and has a first control signal output terminal, which is communicatively connected to the control signal input terminal of the working circuit of the electric braking device; the sensing control device is used to control the electric braking device to brake or release the brakes on the wheels.

[0028] In a further technical solution, the sensing control device is located on the upper part of the push rod frame and is positioned corresponding to an operating position of the operator.

[0029] In a further technical solution, the sensing control device includes a surface leather protective layer, a sensing metal sheet, and a bottom insulating support layer; The sensing metal sheet is connected to the transmitter and receiver of a controller, and an electromagnetic field is formed between the transmitter and receiver.

[0030] In a further technical solution, the identification device is mounted on the vehicle frame and has a second control signal output terminal, which is communicatively connected to the control signal input terminal of the working circuit of the electric braking device; the identification device is used to control the electric braking device to brake or release the brakes on the wheels. The identity recognition device is communicatively connected to an identity recognition system, which includes an identity information database containing the identity information of operators with access rights.

[0031] In a further technical solution, the identity recognition device is a fingerprint recognition module, and the identity information database contains the fingerprint recognition information of the operator with usage rights.

[0032] In a further technical solution, the identity recognition device is a voiceprint recognition module, and the identity information database contains the voiceprint recognition information of the operator with usage rights.

[0033] In a further technical solution, the identity recognition device is a facial recognition module, and the identity information database contains facial recognition information of operators with usage rights.

[0034] In a further technical solution, the identity recognition device is a password input device, and the identity information database contains password information for which the user has access rights.

[0035] In the above schemes, the structure and working principle of various identity recognition devices are existing technologies. Those skilled in the art can flexibly select or combine them according to actual needs. Since they are not the inventive point of this case, they will not be described in detail here.

[0036] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0037] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0038] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0039] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0040] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the case.

[0041] The working principle and advantages of this invention are as follows: This invention designs a stroller that can absorb the impact energy generated by road bumps, thereby achieving effective shock absorption. Compared with existing technologies, this invention can more effectively protect children, especially newborns and toddlers, and comprehensively improve the safety and reliability of the stroller.

[0042] This invention, a multi-link virtual pivot point shock absorption assembly, utilizes a dedicated shock absorber and a multi-link virtual pivot point structure to change the existing stroller's shock absorption method that only uses springs for cushioning. It replaces the existing rigid "triangular" stroller frame structure with a flexible multi-link virtual pivot point shock absorption structure. By utilizing the damping characteristics of the shock absorber's damping components, it provides effective energy absorption and gentle recovery characteristics, fully absorbing the vibration and impact energy generated by road bumps, achieving effective shock absorption, reducing the vibration and impact on children, especially newborns and toddlers, and improving the safety of stroller travel.

[0043] This invention, by incorporating an electrically controlled braking device, not only achieves rapid braking response and excellent braking effect, but also effectively improves the safety and reliability of operation. By introducing a trigger mode and utilizing a sensor-based control device, it effectively prevents accidental operation, especially the dangerous pushing of the stroller while it is in use by another child in the family, and also avoids safety hazards when the operator loses control, further ensuring the safety of the stroller. By introducing an authorization mode and using an identity recognition device to control the operator's permissions, it effectively prevents unauthorized use and completely eliminates the harm caused by unauthorized use. Attached Figure Description

[0044] Appendix Figure 1 This is a schematic diagram of the overall vehicle structure according to an embodiment of the present invention; Appendix Figure 2 This is a schematic diagram of the side of the vehicle according to an embodiment of the present invention; Appendix Figure 3 This is a schematic diagram of the structure of the multi-link virtual pivot point shock absorber assembly in the vehicle frame according to an embodiment of the present invention; Appendix Figure 4 This is a schematic diagram of the virtual turning point position in the initial state of an embodiment of the present invention; Appendix Figure 5This is a schematic diagram of the virtual turning point position under vibration conditions according to an embodiment of the present invention; Appendix Figure 6 This is a schematic diagram of the multi-link virtual pivot point shock absorber assembly from the inside view of the vehicle frame according to an embodiment of the present invention; Appendix Figure 7 This is an exploded view of the multi-link virtual pivot point shock absorber assembly according to an embodiment of the present invention; Appendix Figure 8 This is a schematic diagram of the structure of the vehicle frame when it is fully opened according to an embodiment of the present invention; Appendix Figure 9 This is a structural diagram of the vehicle frame during the folding or unfolding process according to an embodiment of the present invention (shock absorbers omitted). Appendix Figure 10 This is a schematic diagram of the vehicle frame when it is fully folded up according to an embodiment of the present invention (shock absorbers omitted). Appendix Figure 11 This is a structural schematic diagram (perspective) of the shock absorber according to an embodiment of the present invention; Appendix Figure 12 This is an exploded view of the shock absorber according to an embodiment of the present invention after removing the outer cover and the recovery spring; Appendix Figure 13 This is an exploded view of the wheel electromagnetic brake according to an embodiment of the present invention; Appendix Figure 14 This is a schematic diagram illustrating the structural principle of the sensing control device according to an embodiment of the present invention; Appendix Figure 15 This is a schematic diagram of the signal triggering of the sensing control device according to an embodiment of the present invention; Appendix Figure 16 This is a schematic diagram of the appearance of the identity recognition device according to an embodiment of the present invention; Appendix Figure 17 This is a schematic diagram illustrating the control principle of an embodiment of the present invention.

[0045] In the attached diagrams: 1. Frame; 2. Multi-link virtual pivot point shock absorber assembly; 3. Surface leather protective layer; 4. Inductive metal plate; 5. Inductive control device; 6. Electric braking device; 7. Wheel; 8. Bottom insulating support layer; 9. Electromagnetic field; 10. Controller; 101. Transmitter; 102. Receiver; 11. Push rod bracket; 12. Main joint; 13. Front bracket; 14. First link; 15. Second link; 16. Third link; 17. Seat unit; 18. Shock absorber; 181. Moving end; 182. Fixed end; 19. Lever; 20. Swing arm; 21. Rear bracket; 22. Connecting frame; 221. First beam; 222. Second beam; 23. First support rod; 24. Second support rod; 25. Damper; 26. Return spring; 27. 28. Outer casing; 31. Damping cylinder; 32. Piston rod; 33. Damping component; 34. Alarm light and / or buzzer; 35. Touch screen; 36. Rear wheel axle; 37. Mounting plate; 38. Armature; 39. Axle pin; 40. Spring; 41. Magnetic yoke brake disc; 42. Coil; 43. Bearing; 51. Identification device; L1. First connection line; L2. Second connection line; L3. Center line of the shock absorber's extension / retraction direction; A. First rotation point; B. Third rotation point; C. First hinge point; D. Fourth rotation point; E. Second rotation point; F. Second hinge point; G. Fifth rotation point; H. Sixth rotation point; P. Virtual rotation point. Detailed Implementation

[0046] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0047] See appendix Figure 1 , Figure 2 As shown, a shock-absorbing smart stroller has a frame 1 including a push rod frame 11, a front support 13, a main joint 12, and a multi-link virtual pivot shock absorption assembly 2.

[0048] like Figures 3-7 As shown, the multi-link virtual pivot shock absorber assembly 2 includes a shock absorber 18, a lever 19, a swing arm 20, a rear support 21, and a connecting frame 22.

[0049] The shock absorber 18 is vertically arranged, with the upper end being the movable end 181 and the lower end being the fixed end 182. The extension and retraction direction of the shock absorber 18 is vertical. In addition to being vertically arranged, the shock absorber 18 can also be inclined or horizontally arranged, but vertical arrangement is preferred.

[0050] The first end of the lever 19 is rotatably connected to the first hinge point C of the rear bracket 21; the middle part of the lever 19 is rotatably connected to a first beam 221 of the connecting frame 22, forming a first rotation point A; the second end of the lever 19 is rotatably connected to a movable end 181 of the shock absorber 18, forming a third rotation point B.

[0051] The first end of the swing arm 20 is rotatably connected to the second hinge point F of the rear bracket 21, and the second end of the swing arm 20 is rotatably connected to a second beam 222 of the connecting frame 22, forming a second rotation point E. The first beam 221 and the second beam 222 of the connecting frame 22 are relatively fixed, wherein the first beam 221 is the upper beam and the second beam 222 is the lower beam.

[0052] like Figures 3-5 As shown, both the lever 19 and the rocker arm 20 rotate counterclockwise. Specifically, when the wheel 7 contacts the ground protrusion causing the frame 1 to vibrate, the rear support 21 moves upward, thereby driving the first hinge point C of the lever 19 to move upward. At this time, the lever 19 rotates around the first rotation point A, and the second end of the lever 19 moves downward at the third rotation point B, forcing the movable end 181 of the shock absorber 18 to move downward. At the same time, the second hinge point F of the rocker arm 20 moves upward, and the rocker arm 20 rotates around the second rotation point E. The second beam 222 of the connecting frame 22 remains relatively stationary, thereby providing support force to the fixed end 182 of the shock absorber 18.

[0053] The fixed end 182 of the shock absorber 18 is rotatably connected to the second beam 222 of the connecting frame 22, forming a fourth rotation point D. This fourth rotation point D is located in front of the second rotation point E. When the vehicle frame vibrates, the rotation amplitude of the shock absorber 18 around the fourth rotation point D is less than or equal to 5°. Figures 3-5 The rotation direction of the middle shock absorber 18 is clockwise.

[0054] like Figure 4 , Figure 5 As shown, the line connecting the first hinge point C and the first rotation point A is defined as the first line L1, and the line connecting the second hinge point F and the second rotation point E is defined as the second line L2. The intersection of the extensions of the first line L1 and the second line L2 is defined as a virtual rotation point P. This virtual rotation point P tends to move in the extension / retraction direction of the shock absorber 18 when the frame vibrates. That is, when the frame 1 vibrates, the distance d2 from the virtual rotation point P to L3 is less than the distance d1 from the virtual rotation point P to L3 when the frame 1 is stationary. L3 is the centerline of the extension / retraction direction of the shock absorber 18.

[0055] The first hinge point C and the second hinge point F are staggered in both the height and front-back directions. This design enables the multi-link virtual pivot point shock absorber assembly 2 to have an initial moment of inertia and an initial rotation angle, thereby achieving the overall rotation of the shock absorber 18, rear bracket 21, lever 19, and swing arm 20.

[0056] Preferably, the first hinge point C is located above and behind the second hinge point F.

[0057] Preferably, the lever 19 is a curved lever with both ends bent upwards, and the first hinge point C is higher than the first rotation point A. The rocker arm 20 is a curved rocker arm with both ends bent downwards, and the second rotation point E is higher than the second hinge point F. By setting the first hinge point C higher than the first rotation point A and the second rotation point E higher than the second hinge point F, the rotation radius of the initial virtual rotation point P can be reduced (the frame 1 rotates around the virtual rotation point P, and the rear support 21 rotates counterclockwise around the virtual rotation point P), which helps to reduce the energy required for shock absorption by the frame 1, so that even small vibrations can be absorbed by the shock absorber 18.

[0058] Preferably, the rear support bracket 21 includes a first support rod 23 and a second support rod 24, the lower ends of which are fixed together and serve as the positioning part for the rear wheel. The extended lines of the lower ends of the first support rod 23 and the second support rod 24 intersect at the axle of the rear wheel. The first hinge point C is located at the upper end of the first support rod 23, and the second hinge point F is located at the upper end of the second support rod 24. The length of the first support rod 23 is greater than the length of the second support rod 24, forming an irregular V-shape for the rear support bracket 21.

[0059] like Figure 6 , Figure 7 As shown, it also includes a first connecting rod 14 (which can be bent), a second connecting rod 15, and a third connecting rod 16. The upper end of the first connecting rod 14 is rotatably connected to the lower part of the main joint 12, forming a fifth rotation point G. The lower end of the first connecting rod 14 is rotatably connected to the rear end of the second connecting rod 15 and the front end of the third connecting rod 16, forming a sixth rotation point H. The front end of the second connecting rod 15 is rotatably connected to the front bracket 13, and the rear end of the third connecting rod 16 is rotatably connected to the second support rod 24.

[0060] The technical effects of this three-link design include: 1. Connecting the frame 1, making it a unified whole; 2. Folding the bike, facilitating the rotation of the front support 13 around the main joint 12 towards the rear support 21; 3. During vibrations, the rotation of the rear support 21, via the three-link, pushes the front support 13 forward, allowing the frame 1 to remain horizontal and move downwards, thus aiding in shock absorption. Otherwise, when the rear support 21 (rear wheel) moves upwards, the frame 1 will tilt forward, which is detrimental to effective shock absorption and compromises the safety of pushing the bike.

[0061] like Figures 8-10 As shown, the frame also includes a seat unit 17, which is detachably mounted to the main joint 12. The frame has a folded state and an open state, and during folding or opening, the push rod frame 11 rotates about the main joint 12. The front bracket 13 is rotatably connected to the front end of the first beam 221 of the connecting frame 22.

[0062] like Figure 11 , Figure 12 As shown, the shock absorber 18 includes a damper 25, a restoring spring 26, and an outer cover 27.

[0063] The damper 25 includes a damping cylinder 28 and a piston rod 31 that is slidably positioned within and sealed to the damping cylinder 28. The damping cylinder 28 is filled with a damping medium, which can be a damping liquid (such as hydraulic oil) or a damping gas. The end of the damping cylinder 28 serves as the movable end 181, and the extended end of the piston rod 31 serves as the fixed end 182.

[0064] The restoring spring 26 acts between the damping cylinder 28 and the piston rod 31, and keeps the piston rod 31 extending out of the damping cylinder 28 (i.e., returning to its initial state). The outer cover 27 is divided into two parts that are fitted together opposite each other, such as... Figure 11 As shown, the upper half covers the outside of the damping cylinder 28, and the lower half covers the outside of the piston rod 31.

[0065] The damper 25 is used to absorb the energy generated when the frame 1 vibrates. The restoring spring 26 provides the restoring force of the damper 25. The outer cover 27 serves to prevent dust and provide protection.

[0066] The working principle of the multi-link virtual pivot point shock absorber structure is that when the pushcart wheel 7 (such as the rear wheel) encounters a road obstacle, it swings upward, pushing the V-shaped rear bracket 21 to move upward. The longer first support rod 23 pushes the C point of the curved lever 19 to rotate upward, so that the other horizontal end B of the curved lever 19 moves downward with the lever fulcrum A as the pivot point. This pushes the upper end of the shock absorber 18 downward, pushing the shock absorber piston rod 31 to move in the damping cylinder 28 while compressing the recovery spring 26.

[0067] At the same time, the second support rod 24 of the V-shaped rear bracket 21 drives the third link 16 and the second link 15 to move, pushing the front bracket 13 forward.

[0068] During the movement of the piston rod 31 within the damping cylinder 28, the impact energy is dissipated within the damping cylinder 28 through the damping component 32 and the damping fluid. Finally, the restoring spring 26 provides a restoring force to reset the piston rod 31, and the shock absorber 18 returns to its initial state. Through one reciprocating motion of the shock absorber 18, the impact energy generated by road bumps is effectively absorbed and dissipated by the shock absorber 18, reducing the vibration impact on the seat unit 17.

[0069] like Figure 13 As shown, it also includes an electric braking device 6 for the wheel 7, which is installed on the rear wheel axle 36 and can also be installed on the front wheel axle. The electric braking device 6 includes a braking part for the rear wheel axle 36 and a control signal input terminal.

[0070] Preferably, the electrically controlled braking device 6 is an electromagnetic brake, which includes a fixed plate 37, an armature 38, a shaft pin 39, a release spring 40, a magnetic yoke brake disc 41, a coil 42, and multiple bearings 43; wherein, the fixed plate 37, the armature 38, the shaft pin 39, and the release spring 40 form a rotor, which is mounted on the rear wheel shaft and rotates together with the wheel 7; the magnetic yoke brake disc 41 and the coil 42 form a stator, which is fixedly mounted on the inner wall of the rear wheel fork.

[0071] When the coil 42 is not energized, the armature 38 disengages from the magnetic yoke brake disc 41, and the wheel 7 rotates normally. When the coil 42 is energized, the armature 38 compresses and releases the spring 40 under the action of electromagnetic force, which then attracts the magnetic yoke brake disc 41. The friction pad on the surface of the armature 38 rubs against the disc surface of the magnetic yoke brake disc 41, generating frictional resistance, which reduces the speed of the wheel 7, thus slowing down the cart, or reduces the speed of the wheel 7 to zero, thus braking the cart.

[0072] In addition to the electromagnetic brake disclosed in this embodiment, the electronically controlled braking device 6 may also use other existing mature technologies, namely other devices or solutions that can trigger the braking or release of the rear wheel rotating shaft 36 through electrical signals, such as electronically controlled drum brakes, disc brakes, etc.

[0073] It also includes a sensing control device 5, which is mounted on the frame 1 and has a first control signal output terminal. The first control signal output terminal is communicatively connected to the control signal input terminal of the working circuit of the electric braking device 6. The sensing control device 5 is used to control the electric braking device 6 to brake or release the brake on the wheels 7.

[0074] Preferably, the sensing control device 5 is located on the upper part of the push rod frame 11 and is set in a position corresponding to the operator's operation position (such as the grip position when the operator pushes the cart), so that the operator can operate it conveniently when pushing the cart. At the same time, the higher operation position can also prevent children from accidentally touching or operating it.

[0075] like Figure 14 , Figure 15 As shown, the sensing control device 5 can be a "sandwich" structure consisting of a surface leather protective layer 3, a sensing metal sheet 4, and a bottom insulating support layer 8. This structure effectively protects the sensing metal sheet 4 from moisture and rust, thus maintaining high sensitivity. The sensing metal sheet 4 is connected to the transmitter 101 and receiver 102 of a controller 10. By touching the electromagnetic field 9, it generates an interference level, thereby determining whether a person's hand is touching or leaving the push handle. Simultaneously, the interference level serves as a trigger signal, which is transmitted to the electric braking device 6 through the control signal output terminal to brake or release the brake on the wheel 7.

[0076] In one implementation, the system can be configured to maintain braking when there is no sensor to improve safety, or to brake immediately after the sensor is lost to reduce power consumption.

[0077] Preferred, such as Figure 16 As shown, it also includes an identification device 51, which is disposed on the frame 1 and has a second control signal output terminal. The second control signal output terminal is communicatively connected to the signal input terminal of the working circuit of the electric braking device 6. The identification device 51 is used to control the electric braking device 6 to brake or release the brake on the wheels 7.

[0078] The identity recognition device 51 is communicatively connected to an identity recognition system, which includes an identity information database containing the identity information of operators with access rights. The identity information database can be located on a cloud server or stored locally (in the vehicle's) storage module.

[0079] When using the trolley, the identity recognition device 51 first identifies the current operator to determine whether the current operator has the right to use it. If the operator has the right to use it, a control signal is sent to the electric braking device 6 to release the brake on the wheels 7.

[0080] To further enhance security, the identification information of the identification device 51 and the trigger signal of the sensing control device 5 can be used together as the control signal for the electric braking device 6 to release the brake on the wheel 7. That is, to use the trolley, both the identification pass and the sensing control trigger must be met simultaneously.

[0081] like Figure 16As shown, it may also include an alarm light and / or a buzzer 34 and a touch screen 35, through which the vehicle status, function menu, and function settings can be displayed and configured. An alarm is triggered by the alarm light (LED) and / or the buzzer 34 when identification fails.

[0082] Specifically, the identity recognition device 51 may include a combination of one or more of the following embodiments: 1. A fingerprint recognition module, wherein the identity information database contains the fingerprint recognition information of the operator with usage rights. When the operator uses the cart, he / she first identifies the fingerprint information he / she inputs through the fingerprint recognition module of the identity recognition device 51. If the fingerprint information matches the fingerprint information of the operator with usage rights pre-recorded in the identity information database, the cart is released from its brakes and can be pushed and used.

[0083] 2. Voiceprint recognition module: The identity information database contains the voiceprint recognition information of the operator with usage rights. When the operator uses the cart, he first identifies the voiceprint information he inputs through the voiceprint recognition module of the identity recognition device 51. If the voiceprint information matches the voiceprint information with usage rights that has been pre-recorded in the identity information database, the cart is released from the brake and can be pushed and used.

[0084] 3. Facial recognition module (including camera): The identity information database contains facial recognition information of operators with usage rights. When the operator uses the cart, the facial information captured by the facial recognition module of the identity recognition device 51 is first identified. If the facial information matches the facial information with usage rights pre-recorded in the identity information database, the cart is released from braking and can be pushed and used.

[0085] 4. Password input device: The identity information database contains password information with usage permissions. When using the cart, the operator first inputs the password information through the password input device of the identity recognition device 51. If the password information matches the password information with usage permissions pre-entered in the identity information database, the cart is released from its brakes and can be pushed and used.

[0086] The above-described implementation scheme of the identity recognition device 51 is merely an example. Other known identity recognition methods may also be included. Since the recognition technology itself is not the inventive point of this case, it will not be elaborated upon here.

[0087] The operator can set whether the identification device 51 is working or not; that is, the trolley can be used normally without authorization by turning off the identification device 51. Similarly, the sensor control device 5 is not necessary; when the identification device 51 is working, the trolley can be directly released from the brake via the electric brake device 6.

[0088] This embodiment may also include a battery pack, which is fixedly or detachably assembled with the frame 1 to provide power to the various electrical modules of the trolley. A rechargeable battery pack is preferred.

[0089] This invention includes a curved lever 19, whose fulcrum is a first rotation point A located on the first beam 221 of a connecting frame 22; a unidirectional upward-swinging curved rocker arm 20, whose swing point is a second rotation point E located on the second beam 222 of the connecting frame 22; a trolley shock absorber 18, whose upper movable end 181 is connected to one end of the curved lever 19, and the other end is fixed to the second beam 222 of the connecting frame 22; and a "V"-shaped rear support 21, whose upper end is connected to the other end of the curved lever 19, and whose lower end is connected to the swing end of the curved rocker arm 20. This forms a multi-link virtual rotation point shock absorber assembly 2, with the virtual rotation point P formed by the intersection of a first line L1 connecting the upper end of the "V"-shaped rear support 21 and the fulcrum of the curved lever 19, and a second line L2 connecting the lower end of the "V"-shaped rear support 21 and the swing point of the curved rocker arm 20. When the rear wheel encounters a bumpy road surface or an obstacle, it swings upward, pushing the movable end 181 of the curved lever 19, which is connected to the shock absorber 18, downward. This compresses the shock absorber 18, pushing the piston rod 31 in the damping cylinder 28 to move. The vibration and impact energy is absorbed by the damping fluid in the damping cylinder 28, and at the same time, the return spring 26 is compressed. When the external force is removed, the return spring 26 provides a restoring force, causing the shock absorber 18 to return to its original state at a certain restoring speed.

[0090] The multi-link virtual pivot point shock absorber 2 flexibly connects the rear wheel, frame and seat through the linkage shock absorber structure instead of rigidly connecting them. The vibration impact energy is absorbed and dissipated by the movement of the piston rod 31 in the damping fluid in the damping cylinder 28, which effectively realizes the shock absorption function.

[0091] like Figure 17 As shown, this embodiment also includes: a sensing control device 5 (sensor trigger), installed on the push handle, which automatically sends a contact signal to the main control module when the operator's hand touches it, and sends a departure signal when the hand leaves the push handle; and an electric control braking device (brake module), which consists of electromagnetic brakes installed on the two rear wheel hubs respectively.

[0092] It also includes an identity recognition device 51 (identity recognition), used to collect the operator's identity information and automatically send an identity matching result signal when authorized to use the device; and a display module, including a touch screen 35, an alarm light and / or a buzzer 34. The main control module receives the identity recognition information sent by the identity recognition device 51, performs matching, and determines whether the current operator has operating authority based on the recognition result.

[0093] During normal pushing, the electromagnetic brake does not activate and has no effect on pushing. Once the sensing control device 5 senses that the operator has left the handlebars, or the identity recognition device 51 recognizes that the current operator does not have operating authority, the main control module determines that the cart needs to be braked and will send an activation signal to the electromagnetic brake to brake the cart.

[0094] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A shock-absorbing intelligent child stroller, characterized in that: Its frame (1) includes a pushrod frame (11), a front bracket (13), a main joint (12), and a multi-link virtual pivot shock absorber assembly (2); The multi-link virtual pivot shock absorber assembly (2) includes a shock absorber (18), a lever (19), a swing arm (20), a rear bracket (21), and a connecting frame (22). Wherein, the first end of the lever (19) is rotatably connected to the first hinge point (C) of the rear bracket (21); the middle part of the lever (19) is rotatably connected to a first beam (221) of the connecting frame (22), forming a first rotation point (A); the second end of the lever (19) is rotatably connected to a movable end (181) of the shock absorber (18). The first end of the swing arm (20) is rotatably connected to the second hinge point (F) of the rear bracket (21), and the second end of the swing arm (20) is rotatably connected to a second beam (222) of the connecting frame (22), forming a second rotation point (E). The first hinge point (C) and the second hinge point (F) are staggered in both the height direction and the front-back direction; The shock absorber (18) is positioned in the connecting frame (22), and its fixed end (182) is rotatably connected to the second beam (222) of the connecting frame (22). The first beam (221) and the second beam (222) of the connecting frame (22) are relatively fixed. The line connecting the first hinge point (C) and the first rotation point (A) is defined as the first line (L1), the line connecting the second hinge point (F) and the second rotation point (E) is defined as the second line (L2), and the intersection of the first line (L1) and the second line (L2) is defined as a virtual rotation point (P). When the frame (1) vibrates, the distance from the virtual rotation point (P) to the center line of the shock absorber's extension direction is less than the distance from the virtual rotation point (P) to the center line of the shock absorber's extension direction when the frame (1) is stationary. It also includes an electronically controlled braking device (6), which is at least mounted on the rear wheel axle (36), including a braking part for braking the rear wheel axle (36), and having a control signal input terminal; The control signal input terminal is communicatively connected to the control signal output terminal of a sensing control device (5) and / or the control signal output terminal of an identity recognition device (51).

2. The shock-absorbing intelligent child stroller according to claim 1, characterized in that: The first hinge point (C) is located above and behind the second hinge point (F).

3. The shock-absorbing intelligent child stroller according to claim 1, characterized in that: The rear bracket (21) includes a first support rod (23) and a second support rod (24), the lower ends of which are fixed together and serve as the positioning part of the rear wheel; The first hinge point (C) is located at the upper end of the first support rod (23), and the second hinge point (F) is located at the upper end of the second support rod (24).

4. The shock-absorbing intelligent child stroller according to claim 1, characterized in that: The shock absorber (18) is set vertically, with the upper end being the movable end (181) and the lower end being the fixed end (182). The extension and retraction direction of the shock absorber (18) is the up and down direction.

5. The shock-absorbing intelligent child stroller according to claim 1, characterized in that: The connection point between the fixed end (182) of the shock absorber (18) and the second beam (222) of the connecting frame (22) is located in front of the second rotation point (E).

6. The shock-absorbing intelligent child stroller according to claim 1, characterized in that: The shock absorber (18) includes a damper (25), a restoring spring (26), and an outer casing (27). The damper (25) includes a damping cylinder (28) and a piston rod (31) that is slidably positioned in and sealed with the damping cylinder (28). The piston rod (31) reciprocates by extending or retracting into the damping cylinder (28). The damping cylinder (28) is filled with a damping medium. The end of the damping cylinder (28) serves as the movable end (181), and the extended end of the piston rod (31) serves as the fixed end (182). The restoring spring (26) acts between the damping cylinder (28) and the piston rod (31), and keeps the piston rod (31) extending out of the damping cylinder (28); The outer cover (27) is divided into two parts that are fitted together, one part covering the outside of the damping cylinder (28) and the other part covering the outside of the piston rod (31).

7. The shock-absorbing intelligent children's stroller according to claim 1, characterized in that: The lever (19) is a curved lever, and the first hinge point (C) is higher than the first rotation point (A). The second rotation point (E) of the rocker arm (20) is higher than the second hinge point (F).

8. The shock-absorbing intelligent children's stroller according to claim 1, characterized in that: The fixed end (182) of the shock absorber (18) and the second beam (222) of the connecting frame (22) are connected at the fourth rotation point (D), and the rotation amplitude of the shock absorber (18) around the fourth rotation point (D) is less than or equal to 5°.

9. A shock-absorbing intelligent children's stroller according to claim 1, characterized in that: The sensing control device (5) is mounted on the vehicle frame (1) and has a first control signal output terminal, which is communicatively connected to the control signal input terminal of the electric braking device (6).

10. A shock-absorbing intelligent children's stroller according to claim 1, characterized in that: The identification device (51) is mounted on the vehicle frame (1) and has a second control signal output terminal, which is communicatively connected to the control signal input terminal of the electric braking device (6). The identity recognition device (51) is communicatively connected to an identity recognition system.

11. A shock-absorbing intelligent children's stroller according to claim 1, characterized in that: The identity recognition device (51) includes one or more of the following: fingerprint recognition module, voiceprint recognition module, facial recognition module, and password input device.

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