Brake mechanism and baby carriage

Abstract

The invention relates to a brake mechanism and a baby carriage. The brake mechanism is used for locking a wheel and comprises a driving device; the power supply assembly is used for supplying power to the driving device; the control device is used for controlling the driving device; the locking mechanism comprises a first matching part connected with the driving device, and under the driving of the driving device, the first matching part can be switched between a locking state in which the first matching part is clamped with a second matching part of the wheel and an unlocking state in which the first matching part is separated from the second matching part. The braking mechanism can be applied to the baby carriage, when the uncontrolled dangerous situation happens to the baby carriage, the control device can control the driving device, under driving of the driving device, the first matching part can be clamped with the second matching part of the wheel, the baby carriage is braked in time, and therefore the safety of the baby carriage is greatly improved.

Description

Technical Field

[0001] This invention relates to braking mechanisms, and more particularly to braking mechanisms suitable for strollers. Background Technology

[0002] Traditional strollers require manual or pedal operation to brake the wheels. A typical braking mechanism includes a brake pedal. To brake the stroller, the user presses the brake pedal, which pivots downwards, locking the wheels. Conversely, to push the stroller, the user pushes the brake pedal with their toe, pivoting upwards and releasing the wheels.

[0003] However, this method carries a potential risk: the brakes may not be fully locked, causing the stroller to accidentally slide or move on sloping terrain such as ramps, creating a safety hazard. Especially when users park the stroller in a high place and neglect to fully lock the wheels before leaving, the stroller could easily slide uncontrollably downhill, endangering the infant inside – a truly worrying safety issue. Summary of the Invention

[0004] Therefore, it is necessary to provide a braking mechanism with higher safety and a stroller using the braking mechanism.

[0005] A braking mechanism for locking a wheel includes:

[0006] Drive unit;

[0007] Power supply assembly for supplying power to the drive device;

[0008] Control device, used to control the drive device;

[0009] The locking mechanism includes a first engaging part connected to the drive device, which, under the drive of the drive device, can switch between a locked state in which it engages with a second engaging part of the wheel and an unlocked state in which it disengages from the second engaging part.

[0010] The aforementioned braking mechanism can be applied to strollers. When a stroller is in an uncontrollable dangerous situation, the control device can control the drive device. Under the drive of the drive device, the first mating part can engage with the second mating part of the wheel, stopping the stroller in time and thus greatly improving the safety of the stroller.

[0011] In one embodiment, the locking mechanism includes: a drive member disposed at one end of the first mating portion away from the second mating portion, the drive device being capable of driving the drive member to move, so that the drive member can drive the first mating portion to switch between a locked state engaged with the second mating portion of the wheel and an unlocked state disengaged from the second mating portion; and a slider connected to the drive device for driving the drive member to move.

[0012] In one embodiment, the locking mechanism further includes a wheel seat and a first reset member, wherein the first mating part is movably disposed on the wheel seat, the first reset member is sleeved outside the first mating part, and both ends of the first reset member abut against the wheel seat and the driving member, respectively.

[0013] In one embodiment, the first mating part is provided with a guide post, the driving member is provided with a guide groove, and the guide post is inserted into the guide groove and can slide along the guide groove.

[0014] In one embodiment, the locking mechanism further includes a second reset member, the driving member has a receiving groove, the first mating part is movably disposed in the receiving groove, and the two ends of the second reset member abut against the first mating part and the groove wall of the receiving groove, respectively.

[0015] In one embodiment, the locking mechanism includes a telescopic locking mechanism located between the first mating part and the driving device and driven by the driving device. The telescopic locking mechanism is used to lock the first mating part in a locked state that engages with the second mating part and in an unlocked state that disengages from the second mating part.

[0016] In one embodiment, the telescopic locking mechanism includes: a pushing member, one end of which is linked to the driving device and the other end of which is provided with a first ratchet tooth; the surface of the pushing member is also provided with a first guide groove along the axial direction; a rotating member, which is rotatably connected to the first mating part; one end of the rotating member is provided with a second ratchet tooth that can mesh with the first ratchet tooth; the surface of the rotating member is also provided with a second guide groove and a locking position along the axial direction; and a limiting member, which is sleeved outside the pushing member and the rotating member; the inner wall of the limiting member is provided with a protruding rib that can slide in the first guide groove and the second guide groove, and the protruding rib can selectively abut against the locking position.

[0017] In one embodiment, the locking mechanism further includes a first reset member for providing a force to the rotating member to move away from the second mating portion.

[0018] In one embodiment, the locking mechanism further includes a slider connected to the driving device and the telescopic locking mechanism, and used to drive the telescopic locking mechanism to move.

[0019] In one embodiment, the driving device includes a drive motor, a slider, and a drive rod. The drive motor is electrically connected to the power supply assembly. The slider is able to slide relative to the drive motor under the drive of the drive motor. The first end of the drive rod is fixed to the slider, and the second end of the drive rod is connected to the locking mechanism.

[0020] In one embodiment, the driving device further includes a driving gear and a rack. The driving gear is fixed on the shaft of the driving motor, and the rack is disposed on the sliding body and meshes with the driving gear. The driving motor can drive the driving gear to rotate, thereby driving the sliding body to slide relative to the driving motor.

[0021] In one embodiment, the driving device further includes a fixed body, the driving motor is fixed to the fixed body, and the sliding body is slidably connected to the fixed body.

[0022] In one embodiment, one of the fixed body and the sliding body is provided with a limiting protrusion, and the other is provided with a limiting groove, wherein the limiting protrusion is slidably disposed in the limiting groove.

[0023] In one embodiment, the braking mechanism further includes an indicator component, which is in a first indicator state when the first mating part is in a locked state and in a second indicator state when the first mating part is in an unlocked state.

[0024] In one embodiment, the locking mechanism further includes a wheel seat, and the indicating component includes an indicating window and an indicating element opened on the wheel seat. The indicating element has a first indicating area and a second indicating area. The indicating element can be driven by the driving member to slide within the wheel seat. When the first mating part is in a locked state, the first indicating area is aligned with the indicating window. When the first mating part is in an unlocked state, the second indicating area is aligned with the indicating window.

[0025] In one embodiment, the driving member includes a force-applying part, the indicator includes a force-receiving part corresponding to the force-applying part, and the indicator assembly further includes a third reset member, the two ends of which abut against the wheel seat and the indicator respectively.

[0026] In one embodiment, the locking mechanism further includes a wheel seat, and the braking mechanism further includes a detection unit disposed on the wheel seat for detecting the state of the first mating part.

[0027] A stroller includes a frame, wheels, and the aforementioned braking mechanism. The wheels are mounted on the frame, and the wheel hubs are provided with a plurality of second engaging portions circumferentially. When a first engaging portion is switched to the locked position, the first engaging portion engages with any one of the second engaging portions; when the first engaging portion is switched to the unlocked position, the first engaging portion disengages from the second engaging portions.

[0028] In one embodiment, the stroller further includes a first sensing device disposed on the frame, the first sensing device being electrically connected to the control device. When the first sensing device detects that the user is separated from the frame, the control device drives the locking mechanism to enter the locked state via a drive device.

[0029] In one embodiment, the stroller further includes a drive shaft and a power assist motor, the drive shaft being connected to the wheels, and a power supply assembly for supplying power to the power assist motor, which is connected to the drive shaft and is used to drive the wheels to rotate via the drive shaft.

[0030] In one embodiment, the stroller further includes a second sensing device for detecting the number of rotations of the assist motor. The second sensing device is electrically connected to the control device. When the first sensing device detects that the user is separated from the frame and the second sensing device detects that the number of rotations of the assist motor exceeds a set threshold, the control device drives the locking mechanism to enter the locked state via a drive device.

[0031] In one embodiment, the stroller also includes a power assist switch on the frame. When the first sensing device detects that a user is in contact with the frame, turning on the power assist switch can start the power assist motor, thereby driving the wheels to rotate.

[0032] In one embodiment, when the power assist switch is not turned on, the wheel drives the power assist motor to rotate, thereby reversibly charging the power supply component.

[0033] In one embodiment, the stroller also includes a transmission mechanism disposed between the drive shaft and the power assist motor. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0035] Figure 1 A perspective view of a stroller according to one embodiment;

[0036] Figure 2 for Figure 1 A three-dimensional view of the braking mechanism;

[0037] Figure 3 for Figure 2 An exploded three-dimensional view of the braking mechanism shown.

[0038] Figure 4A A three-dimensional view of the drive unit;

[0039] Figure 4B A three-dimensional view of the drive unit from another angle;

[0040] Figure 5 for Figure 4A An exploded perspective view of the drive device shown.

[0041] Figure 6A for Figure 3 Enlarged view of part A in the middle;

[0042] Figure 6B for Figure 6A A three-dimensional sectional view;

[0043] Figure 7A This is a magnified 3D view of the driving component;

[0044] Figure 7B For along Figure 7A Sectional view of line II in the middle;

[0045] Figure 8 This is a magnified view of a portion of Figure 4 after omitting the indicator components;

[0046] Figure 9 for Figure 8 3D exploded view;

[0047] Figure 10 A 3D view showing the braking mechanism in the unlocked state;

[0048] Figure 11 for Figure 10 Enlarged view of part B in the middle;

[0049] Figure 12A This is a magnified 3D view of the limiting component;

[0050] Figure 12B This is a three-dimensional sectional view of the limiting component;

[0051] Figure 13 A three-dimensional view of the braking mechanism in a transitional state;

[0052] Figure 14 for Figure 13 Enlarged view of a section in the middle C;

[0053] Figure 15 A 3D view showing the braking mechanism in the locked state;

[0054] Figure 16 for Figure 15 A magnified view of a section in part D;

[0055] Figure 17 A perspective view of the braking mechanism omitting the wheel seat;

[0056] Figure 18 for Figure 17 A magnified view of a section in part E;

[0057] Figure 19 for Figure 18 A 3D view of the intermediate gear set. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of protection of this invention.

[0059] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0060] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0062] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0063] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0064] like Figure 1 and Figure 2 As shown, one embodiment of this application provides a stroller 200, including a frame 201, a plurality of wheels 202 movably disposed at the bottom of the frame 201, and two braking mechanisms 100. In this embodiment, the plurality of wheels 202 includes a left front wheel, a right front wheel, a left rear wheel, and a right rear wheel. Each braking mechanism 100 is symmetrically mounted on the left rear wheel and the right rear wheel, respectively, for simultaneously applying braking force to the left rear wheel and the right rear wheel. It is understood that in other embodiments, the number of braking mechanisms 100 may also be one, which may be used to lock only one of the left rear wheel and the right rear wheel. In addition, in some alternative embodiments, the braking mechanism 100 may also be used to lock one or both of the left front wheel and the right front wheel.

[0065] Please see Figure 3The wheel 202 is connected to a drive shaft 203 at its center. The wheel hub of the wheel 202 has a plurality of second mating portions 204 arranged circumferentially. In this embodiment, the plurality of second mating portions 204 are arranged around the radial center of the wheel 202.

[0066] like Figure 2 , Figure 3 and Figure 6A As shown, the braking mechanism 100 includes a power supply assembly 10, a drive device 20, a locking mechanism 30, and a control device 40. The power supply assembly 10 supplies power to the drive device 20. The control device 40 controls the drive device 20. The locking mechanism 30 includes a first engaging portion 32 connected to the drive device 20. Under the drive of the drive device 20, the first engaging portion 32 can switch between a locked state where it engages with a second engaging portion 204 of the wheel 202 and an unlocked state where it disengages from the second engaging portion 204. In this embodiment, the first engaging portion 32 is a brake pin, and the second engaging portion 204 is a locking groove. In other embodiments, the first engaging portion 32 and the second engaging portion 204 can be other structures, for example, one may be a hook-shaped structure, and the other may be a ring-shaped structure or a hook-shaped structure.

[0067] In this embodiment, the power supply component 10 can be multiple 18650 rechargeable lithium batteries connected in series; in other embodiments, it can also be a solar cell, etc., and is not limited thereto. The braking mechanism 100 also includes a battery cover 12 for housing the power supply component 10. The control device 40 is a circuit board (PCB) with a microcontroller unit (MCU). The power supply component 10, the drive device 20, and the control device 40 are electrically connected by wires (not shown), or they can be connected by signals wirelessly, and are not limited thereto. This application will describe the connection by wires below.

[0068] Please see Figure 4A , Figure 4B and Figure 5The driving device 20 includes a drive motor 22, a slider 26, and a drive rod 28. The drive motor 22 is electrically connected to the power supply assembly 10 (e.g., via a wire). The slider 26 can slide relative to the drive motor 22 under its drive. The first end of the drive rod 28 is fixed to the slider 26, and the second end of the drive rod 28 is connected to the locking mechanism 30. In this embodiment, the drive rod 28 extends approximately in a direction perpendicular to the first mating part 32. In other embodiments, the extension direction of the drive rod 28 may be the same as or at another angle to the extension direction of the first mating part 32. Specifically, the driving device 20 also includes a fixed body 24, to which the drive motor 22 is fixed. The slider 26 is slidably connected to the fixed body 24, and can slide relative to the fixed body 24 under the drive of the drive motor 22. Specifically, a mounting groove 242 is provided on one side of the fixed body 24, and the drive motor 22 is disposed in the mounting groove 242. A through hole 244 is also provided on the bottom wall of the mounting groove 242. The shaft of the drive motor 22 (not shown) can pass through the through hole 244. A receiving groove 262 is provided on the side of the sliding body 26 facing the fixed body 24. A rack 264 is provided on the side wall of the receiving groove 262. The drive device 20 also includes a drive gear 25. The drive gear 25 is disposed in the receiving groove 262 and can mesh with the rack 264. The middle part of the drive gear 25 is fixed to the shaft of the drive motor 22, so the drive motor 22 can drive the drive gear 25 to rotate. The first end of the drive rod 28 is fixed to the end of the sliding body 26 away from the receiving groove 262, and the second end of the drive rod 28 can penetrate into the sliding member 35 of the locking mechanism 30 (see figure). Figure 6A ).like Figure 5 As shown, when the drive motor 22 drives the drive gear 25 to rotate clockwise, the drive gear 25 can drive the rack 264 to move to the left, thereby causing the entire sliding body 26 to move to the left relative to the fixed body 24, and further causing the drive rod 28 and the sliding member 35 to move to the left. When the drive motor 22 drives the drive gear 25 to rotate counterclockwise, the drive gear 25 can drive the rack 264 to move to the right, thereby causing the entire sliding body 26 to move to the right relative to the fixed body 24, and further causing the drive rod 28 and the sliding member 35 to move to the right. It can be understood that in other embodiments, the drive motor 22 may not be fixed to the fixed body 24. For example, the drive motor 22 may be directly fixed in the synchronizing tube 318, in which case the fixed body 24 can be omitted. In other embodiments, the drive motor 22 may also be replaced by a cylinder or a magnet assembly (for example, by energizing and discharging two magnets to attract or repel each other, thereby driving the first mating part 32 to extend or retract). In this case, the fixed body 24, drive gear 25, sliding body 26, rack 264 and other structures may also be omitted.

[0069] To limit the travel of the drive rod 28, in this embodiment, the fixed body 24 is provided with a limiting protrusion 246 extending toward the sliding body 26, and the bottom wall of the receiving groove 262 of the sliding body 26 is provided with an elongated limiting groove 266. The limiting protrusion 246 is slidably disposed within the limiting groove 266. It can be understood that in other embodiments, the limiting protrusion 246 may also be provided on the sliding body 26, in which case the limiting groove 266 is correspondingly provided on the fixed body 24. It can also be understood that in some embodiments, the limiting protrusion 246 and the limiting groove 266 may be omitted.

[0070] Please see Figure 3 and Figure 6A The locking mechanism 30 includes a wheel seat 31, a first engaging portion 32, a driving member 33, and a sliding member 35. The first engaging portion 32 can move through the wheel seat 31 and engage with a second engaging portion 204. The driving member 33 is located at the end of the first engaging portion 32 away from the second engaging portion 204. The driving device 20 can drive the driving member 33 to move, so that the driving member 33 can drive the first engaging portion 32 to switch between a locked state engaged with the second engaging portion 204 and an unlocked state disengaged from the second engaging portion 204. The sliding member 35 is connected to the driving device 20 and can drive the driving member 33 to move.

[0071] Specifically, the wheel seat 31 includes a generally annular receiving portion 312 and a connecting portion 314 extending outward from one side of the receiving portion 312. The drive shaft 203 of the wheel 202 is movably disposed within the receiving portion 312, and the connecting portion 314 is used to fix it to the frame 201. The braking mechanism 100 also includes a housing 316 and a synchronizing tube 318. The housing 316 is connected to the receiving portion 312, and the two form a receiving cavity for accommodating the first mating portion 32, the driving member 33, and the sliding member 35. The synchronizing tube 318 is connected to the housing 316 and is used to accommodate the drive unit 20.

[0072] Please see Figure 7A and Figure 7B The driving member 33 is generally hollow and has an internal receiving groove 331. One end of the first mating part 32 is movably disposed within the receiving groove 331. The other end of the first mating part 32, away from the driving member 33, can extend through the wheel seat 31 and engage with the second mating part 204. This achieves a locking engagement between the wheel 202 and the wheel seat 31, thus enabling braking of the wheel 202. The locking mechanism 30 also includes a first reset member 322. The first reset member 322 is sleeved on the outside of the first mating part 32, and its two ends abut against the inner wall of the wheel seat 31 and the end of the driving member 33, respectively. The first reset member 322 allows the driving member 33 to tend to move away from the second mating part 204, thus causing the first mating part 32 to tend to move away from the second mating part 204.

[0073] In this embodiment, the first mating part 32 is provided with a guide post 321 at one end of the receiving groove 331, and the extending direction of the guide post 321 is approximately perpendicular to the extending direction of the first mating part 32. A guide groove 333 is provided on the side wall of the receiving groove 331, and the guide post 321 is inserted into the guide groove 333 and can slide along the guide groove 333. The locking mechanism 30 also includes a second reset member 332. The second reset member 332 is located in the receiving groove 331 of the driving member 33, and both ends of the second reset member 332 abut against the bottom of the receiving groove 331 and the end of the first mating part 32 located in the receiving groove 331, respectively. The second reset member 332 causes the first mating part 32 to have a tendency to move towards the second mating part 204. In this way, a sliding connection can be achieved between the driving member 33 and the first mating part 32, providing a certain buffering effect when the first mating part 32 is inserted into the second mating part 204. This prevents the first mating part 32 from being accidentally broken or worn due to excessive force caused by misalignment or other issues during insertion into the second mating part 204. In this embodiment, both the first reset member 322 and the second reset member 332 are springs; however, other elastic elements can also be used. It is understood that in other embodiments, the first mating part 32 can also be fixedly connected to the driving member 33 or integrally formed, in which case the guide post 321, guide groove 333, second reset member 332, and other mechanisms can be omitted.

[0074] like Figure 6A , Figure 8 and Figure 9 As shown, the wheel seat 31 is also provided with a detection unit 313 for detecting the position state of the first mating part 32. In this embodiment, the detection unit 313 can be a photoelectric sensor.

[0075] like Figure 6A As shown, the locking mechanism 30 also includes a telescopic locking mechanism 34. The telescopic locking mechanism 34 is located between the first mating part 32 and the driving device 20 and is driven by the driving device 20. Specifically, in this embodiment, the sliding member 35 is connected to the driving device 20 and the telescopic locking mechanism 34. The sliding member 35 is used to drive the telescopic locking mechanism 34 to move, and the telescopic locking mechanism 34 is disposed between the driving member 33 and the sliding member 35. In other embodiments, the driving member 33 and / or the sliding member 35 can be omitted. In this case, the telescopic locking mechanism 3 is directly connected to the driving device 20, and / or the telescopic locking mechanism 3 is directly connected to the first mating part 32.

[0076] like Figure 6AAs shown, the telescopic locking mechanism 34 can lock the first mating part 32 in a locked state where it engages with the second mating part 204 and in an unlocked state where it disengages from the second mating part 204. Specifically, in this embodiment, driven by the sliding member 35, the telescopic locking mechanism 34 can lock the driving member 33 in a first locked position and a second locked position. When the driving member 33 is in the first locked position, the first mating part 32 is engaged with the second mating part 204; when the driving member 33 is in the second locked position, the first mating part 32 disengages from the second mating part 204.

[0077] like Figure 10 , Figure 11 , Figure 12A and Figure 12B As shown, in this embodiment, the telescopic locking mechanism 34 includes a pushing member 342, a rotating member 344, and a limiting member 346. The pushing member 342 is generally cylindrical, with one end linked to the driving device 20. More specifically, one end of the pushing member 342 is fixed to the sliding member 35, and the sliding member 35 is moved by the driving device 20, thereby making the pushing member 342 linked to the driving device 20. The other end of the pushing member 342 is provided with a first ratchet tooth 341. The pushing member 342 and the sliding member 35 can be fixed by means of integral molding, or they can be separate structures connected and fixed by fasteners or other structures. The surface of the pushing member 342 is also provided with a plurality of first guide grooves 343 along the axial direction. The rotating member 344 is generally cylindrical, and it can rotate relative to the pushing member 342 and is rotatably connected to the first mating part 32. More specifically, in this embodiment, the driving member 33 is located between the first mating part 32 and the rotating member 344. The rotating member 344 is rotatably connected to the driving member 33 and thus rotatably connected to the first mating part 32. In this embodiment, the end of the rotating member 344 away from the pushing member 342 can be inserted into the driving member 33 and can rotate relative to the driving member 33. The end of the rotating member 344 near the pushing member 342 is provided with a second ratchet tooth 345 that can mesh with the first ratchet tooth 341. The surface of the rotating member 344 is also provided with a plurality of second guide grooves 347 along the axial direction. The plurality of second guide grooves 347 are parallel and spaced apart from each other, and a locking position 348 is provided between two adjacent second guide grooves 347. The limiting member 346 is generally tubular and is fixed to the wheel seat 31 by screws or the like (see Figure 6B The limiting member 346 is sleeved outside the pushing member 342 and the rotating member 344, and the inner wall of the limiting member 346 is provided with a protruding rib 349 that can slide in the first guide groove 343 and the second guide groove 347 (see...). Figure 12B The end of the rib 349 is provided with an inclined surface that can abut against the locking position 348; of course, it can also be a flat surface.

[0078] The following is combined with Figures 10-16 Briefly describe the working principle of the telescopic locking mechanism 34. Please refer to [link / reference]. Figure 10and Figure 11 At this time, the drive component 33 is in the second locked position, the first mating part 32 and the second mating part 204 are disengaged and in the unlocked state, the first guide groove 343 and the second guide groove 347 are aligned, and the protruding rib 349 is located within the first guide groove 343 and the second guide groove 347.

[0079] When braking is required, the drive motor 22 of the drive unit 20 drives the drive gear 25 to rotate clockwise. The drive gear 25 drives the rack 264 to move to the left, thereby causing the entire sliding body 26 to move to the left relative to the fixed body 24. This further drives the sliding member 35 to move closer to the second mating part 204 via the drive rod 28. Under the action of the sliding member 35, the pushing member 342 also moves closer to the second mating part 204, overcoming the elastic force of the first reset member 322. The first ratchet tooth 341 at the end of the pushing member 342 meshes with the second ratchet tooth 345 of the rotating member 344, pushing the rotating member 344 to move closer to the second mating part 204. When the rib 349 disengages from the second guide groove 347, since the rib 349 can no longer restrict the rotation of the rotating component 344, under the mutual guidance of the inclined surfaces of the first ratchet tooth 341 and the second ratchet tooth 345, the rotating component 344 will rotate around its own axis at a certain angle, thereby causing the second guide groove 347 to no longer align with the first guide groove 343 (e.g., Figure 14 As shown), the rib 349 is located only in the first guide groove 343. Ultimately, the rotating member 344 drives the driving member 33, which in turn drives the first mating part 32 into the second mating part 204. It can be understood that if the driving rod 28 of the driving device 20 does not drive the pushing member 342 to the right, then after the rotating member 344 rotates a certain angle, due to the mutual restriction between the first ratchet tooth 341 and the second ratchet tooth 345, the rotating member 344 cannot continue to rotate and remains at a position such as... Figure 14 The location shown.

[0080] When the detection unit 313 detects that the first mating part 32 has fully entered the second mating part 204, the drive motor 22 reverses, causing the sliding member 35 to move a certain distance to the right, and then the drive rod 28 stops applying force to the sliding member 35. Under the action of the first reset member 322, the drive member 33 drives the rotating member 344 to move away from the second mating part 204. During the movement, since the rib 349 no longer restricts the rotation of the rotating member 344, under the mutual guidance of the end of the rib 349 and the inclined surface of the locking position 348, the rotating member 344 moves away from the second mating part 204 and rotates around its own axis at a certain angle, thus preventing the rib 349 from entering the second guide groove 347 and gradually entering the locking position 348. Figure 15 and Figure 16As shown, when the rotating member 344 rotates to the locking position 348 and abuts against the protruding rib 349, the rotating member 344 is blocked by the protruding rib 349 and cannot continue to rotate or move to the right. As a result, the driving member 33 is locked in the first locking position, and the first mating part 32 is locked in the locked state of engaging with the second mating part 204.

[0081] When an unlocking action is required, the drive motor 22 of the drive device 20 drives the drive gear 25 to rotate clockwise again. The drive gear 25 drives the rack 264 to move to the left, thereby causing the entire sliding body 26 to move to the left relative to the fixed body 24. This further drives the sliding member 35 to move closer to the second mating part 204 via the drive rod 28. Under the action of the sliding member 35, the pushing member 342 overcomes the elastic force of the first reset member 322 and also moves closer to the second mating part 204. The pushing member 342 pushes the rotating member 344 to move closer to the second mating part 204, and the protruding rib 349 gradually moves away from the locking position 348. When the rib 349 disengages from the edge of the locking position 348, under the action of the first reset member 322, the rotating member 344 moves away from the second mating part 204. Simultaneously, guided by the inclined surfaces between the first ratchet tooth 341 and the second ratchet tooth 345, the rotating member 344 can rotate around its own axis at a certain angle, causing the rib 349 and the locking position 348 to misalign, and the first ratchet tooth 341 and the second ratchet tooth 345 to re-mesh. When the drive rod 28 reaches the end of its stroke, the drive motor 22 reverses, causing the sliding member 35 to move a certain distance to the right, after which the drive rod 28 stops applying force to the sliding member 35. Under the action of the first reset member 322, the drive member 33 drives the rotating member 344 to move away from the second mating part 204. During the movement, guided by the inclined surfaces between the rib 349 and the second ratchet tooth 345, the rotating member 344 moves away from the second mating part 204 while simultaneously rotating around its own axis at a certain angle until the second guide groove 347 aligns with the first guide groove 343 again. At this point, the rib 349 can re-enter both the first guide groove 343 and the second guide groove 347 simultaneously, the rotating member 344 stops rotating, and can slide to a deeper position to the right relative to the limiting member 346, thereby locking the driving member 33 in the second locking position, while the first mating part 32 is locked in the unlocked state, disengaged from the second mating part 204.

[0082] Because of the telescopic locking mechanism 34, the drive unit 20 does not need to continuously provide power to drive the sliding member 35 to move closer to the second mating part 204. Therefore, the power of the power supply component 10 that powers the drive motor 22 of the drive unit 20 can be greatly saved, and the battery life can be improved.

[0083] It is understood that in other embodiments, the driving member 33 may also be omitted. In this case, the rotating member 344 of the telescopic locking mechanism 34 directly drives the first mating part 32. The end of the first mating part 32 away from the second mating part 204 may be provided with a protrusion for abutting against the first reset member 322. Thus, after the driving member 33 is omitted, the rotating member 344 can directly drive the first mating part 32 to move during the above-mentioned operation, and the first mating part 32 can also directly drive the rotating member 344 to move under the action of the first reset member 322.

[0084] It is understood that in other embodiments, the telescopic locking mechanism 34 may also be omitted. In this case, the driving device 20 directly drives the first mating part 32 to enter the second mating part 204 or disengage from the second mating part 204.

[0085] Please see Figure 3 The braking mechanism 100 also includes an indicator component 50. When the first mating part 32 is in the locked state, the indicator component 50 is in a first indicator state; when the first mating part 32 is in the unlocked state, the indicator component 50 is in a second indicator state, thereby reminding the user in real time whether the wheel 202 is in the locked or unlocked state.

[0086] like Figure 2 and Figure 6A As shown, the indicator component 50 includes an indicator window 311 and an indicator 52. The indicator window 311 is formed on the wheel seat 31. The indicator 52 is slidable relative to the wheel seat 31 and has a first position and a second position. The indicator 52 has a first indicator area 521 and a second indicator area 522. For example, the first indicator area 521 may have a red marker, and the second indicator area 522 may have a green marker. When the indicator 52 is in the first position, the first indicator area 521 is aligned with the indicator window 311, i.e., the red marker is aligned with the indicator window 311, indicating that the wheel 202 is unlocked. When the indicator 52 is in the second position, the second indicator area 522 is aligned with the indicator window 311, i.e., the green marker is aligned with the indicator window 311, indicating that the wheel 202 is locked. It is understood that in other embodiments, the colors of the first indicator area 521 and the second indicator area 522 may also be interchanged.

[0087] Specifically, please refer to Figure 6A , Figure 8 and Figure 9The drive shaft 203 of wheel 202 is provided with a bearing cover 305 on its exterior. The indicating assembly 50 also includes an indicating slide 54 and a third reset member 56 movably sleeved on the outside of the bearing cover 305. The indicating member 52 is fixedly mounted on the indicating slide 54 and can slide relative to the wheel seat 31 together with the indicating slide 54. The two ends of the third reset member 56 abut against the inner wall of the wheel seat 31 and the end of the indicating slide 54, respectively. Therefore, the third reset member 56 can cause the indicating slide 54 to tend to move away from the second mating part 204. In this embodiment, the third reset member 56 is a spring. It can be understood that the third reset member 56 can also be other elastic elements.

[0088] Please see Figure 7A and Figure 13 The driving member 33 also includes a force-applying part 334, and the indicating slider 54 includes a force-receiving part 542 corresponding to the force-applying part 334. In this embodiment, the force-applying part 334 is a radial protrusion formed on the surface of the driving member 33, and the force-receiving part 542 is an axial protrusion formed on the edge of the indicating slider 54. When the driving member 33 drives the first mating part 32 to move toward the second mating part 204 under the action of the driving device 20, the force-applying part 334 of the driving member 33 can push the force-receiving part 542, thereby driving the indicating slider 54 to slide relative to the bearing cover 305 toward the direction closer to the second mating part 204, and compressing the third reset member 56. When the first mating part 32 enters the second mating part 204, the indicating member 52 is in a second position relative to the wheel seat 31. At this time, the green second indicating area 522 is aligned with the indicating window 310, indicating that the wheel 202 is locked. When the driving member 33 is no longer acted upon by the driving device 20, the force-applying part 334 of the driving member 33 no longer pushes the force-receiving part 542. Under the restoring force of the third reset member 56, the indicating slider 54 slides away from the bearing cover 305 away from the second mating part 204. When the first mating part 32 disengages from the second mating part 204, the indicating member 52 is in the first position relative to the wheel seat 31. At this time, the red first indicating area 521 is aligned with the indicating window 310, indicating that the wheel 202 has been unlocked. This allows the user to easily confirm the usage status of the wheel 202 and improves the safety performance of the stroller 200. It is understood that the structure of the force-applying part 334 and the force-receiving part 542 can also adopt other forms. For example, the force-applying part 334 can be a pin, and the force-receiving part 542 can be a pin hole, as long as the driving member 33 can drive the indicating member 52 to slide back and forth relative to the wheel seat 31.

[0089] Please see Figure 17 and Figure 18The stroller 200 also includes a drive shaft 203, a power assist motor 204, and a transmission mechanism 205. The drive shaft 203 is fixedly connected to the wheels 202. The power assist motor 204 is electrically connected to the power supply assembly 10 and the control device 40, respectively, thereby allowing the power supply assembly 10 to supply power to the power assist motor 204. The power assist motor 204 is connected to the drive shaft 203 via the transmission mechanism 205, and is used to drive the wheels 202 to rotate via the drive shaft 203. Figure 19 As shown, in this embodiment, the transmission mechanism 205 is a planetary reducer, including a first gear 205a, a second gear 205b, a third gear 205c, and a fourth gear 205d that mesh with each other. The first gear 205a is connected to the drive shaft 203, and the fourth gear 205d is connected to the rotating shaft of the power assist motor 204. The transmission mechanism 205 amplifies the torque of the power assist motor 204, providing assistance for the stroller 200 to move.

[0090] Please refer to it again. Figure 1 The stroller 200 may have a power assist switch 201a on its frame 201. The power assist switch 201a is electrically connected to the control device 40 and the power assist motor 204 via wires or the like, so that the user can easily turn the power assist motor 204 on or off.

[0091] In this embodiment, since the assist motor 204 is driven and connected to the wheel 202 through the drive shaft 203, when the stroller 200 does not need assistance, the assist switch 201a can be turned off. The assist motor 204 is dragged by the wheel 202 under the action of vehicle inertia and generates electrical energy, which is used to charge the power supply component 10 in reverse, thereby realizing the kinetic energy recovery function.

[0092] To further enhance the safety of the stroller 200, the stroller 200 also includes a first sensor 60 and a second sensor 70.

[0093] Please refer to it again. Figure 1 The first sensing device 60 is a contact sensor installed on the handlebar of the frame 201, used to detect whether the user's hand is in contact with the frame 201. The first sensing device 60 is electrically connected to the control device 40.

[0094] Please refer to section 8 again. Figure 9 and Figure 18 The second sensing device 70 is a photoelectric sensor installed on the bearing cover 305, used to detect the number of rotations of the assist motor 204. The second sensing device 70 is electrically connected to the control device 40. Based on the number of rotations of the assist motor 204 detected by the second sensing device 70, the control device 40 calculates the number of rotations of the wheel 202, and further obtains the walking distance of the stroller 200.

[0095] An embodiment of this application also provides a method for controlling a stroller, including the following steps:

[0096] S100: When the user turns on the power assist switch, the first sensing device determines whether the user is continuously in contact with the frame. If so, the control device starts the power assist motor, and the control device drives the locking mechanism to enter the unlocking state through the drive device.

[0097] When the user presses the assist switch 201a, and the first sensor 60 detects that the user's hand has not left the handlebars of the frame 201, the locking mechanism 30 releases, and the assist motor 204 starts, thereby driving the wheels 202 to rotate. During the stroller's movement, the control device 40 adjusts the output power of the assist motor 204 according to the walking status to help the user easily push the stroller. For example, if the stroller 200 is detected moving uphill, the output power of the assist motor 204 is increased; conversely, if the stroller 200 is detected moving downhill, the output power of the assist motor 204 is decreased.

[0098] When the user turns off the power assist switch 201a, the power assist motor 204 is dragged by the wheels 202 under the vehicle's inertia and generates electrical energy, which is then used to charge the power supply component 10. This achieves energy recovery while simultaneously slowing down the vehicle and significantly improving the power supply component 10's range. Furthermore, the control device 40 intelligently controls the power of energy recovery based on the stroller 200's walking status, ensuring that it does not create significant resistance to the stroller 200's normal movement; that is, it prevents the stroller 200 from struggling to move forward due to excessive energy recovery.

[0099] S200: When the first sensor detects that the user is separated from the frame, the second sensor determines whether the wheels are rotating. If not, the locking mechanism remains in the unlocked state.

[0100] When the first sensor 60 detects that the user's hand has left the handlebars of the frame 201, the power assist motor 204 automatically shuts off. Then, the second sensor 70 determines whether the wheels 202 are rotating. If the result is that the wheels 202 are not rotating, it means that the stroller 200 is not moving under the current road conditions (for example, the stroller 200 is currently on flat ground). At this time, even if the braking mechanism 100 is not activated, the stroller 200 will not move arbitrarily. Therefore, the locking mechanism 30 can remain in the unlocked state, making it convenient for the user to push the stroller 200 at any time.

[0101] S300, when the first sensor detects that the user is separated from the frame, and the second sensor detects that the number of rotations of the assist motor exceeds a set threshold or the second sensor detects that the assist motor is rotating, the control device drives the locking mechanism to enter the locking state through the drive device.

[0102] When the first sensor 60 detects that the user's hand has left the handlebars of the frame 201, and the second sensor 70 detects that the number of rotations of the assist motor 204 exceeds a set threshold, it indicates that the stroller 200 is currently on uneven ground, such as uphill or downhill, and a danger may occur if no intervention is taken. At this time, the control device 40 drives the locking mechanism 30 to enter the locking state via the drive device 20, thereby locking the wheels 202. Of course, in another embodiment, when the first sensor 60 detects that the user's hand has left the handlebars of the frame 201, and the second sensor detects that the assist motor is rotating, the control device 40 is immediately triggered to drive the locking mechanism 30 to enter the locking state via the drive device 20.

[0103] S400, when the first sensing device determines that the user is in contact with the frame, the control device drives the locking mechanism to enter the unlocking state through the drive device.

[0104] When the first sensor 60 detects that the user's palm is in contact with the handle of the frame 201 again, it indicates that the user has resumed taking control of the stroller 200. At this time, the control device 40 can drive the locking mechanism 30 to enter the unlocking state through the drive device 20 to facilitate the rotation of the wheels 202.

[0105] like Figure 2 As shown, the stroller 200 also includes a mechanical braking mechanism 206. In this embodiment, the mechanical braking mechanism 206 is a foot-operated braking device, the structure of which can be referred to in the prior art and will not be described in detail here. When the power supply component 10 is depleted or the braking mechanism 100 fails to work for other reasons, the user can also use the mechanical braking mechanism 206 to lock the wheels 202, further improving the safety of the entire stroller 200.

[0106] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0107] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A braking mechanism for locking a wheel, characterized in that, include: Drive unit; Power supply assembly for supplying power to the drive device; Control device, used to control the drive device; The locking mechanism includes a first engaging part connected to the drive device, which, under the drive of the drive device, can switch between a locked state in which it engages with a second engaging part of the wheel and an unlocked state in which it disengages from the second engaging part.

2. The braking mechanism according to claim 1, characterized in that, The locking mechanism includes: A telescopic locking mechanism is located between the first mating part and the driving device and is driven by the driving device. The telescopic locking mechanism is used to lock the first mating part in a locked state that engages with the second mating part and in an unlocked state that disengages from the second mating part.

3. The braking mechanism according to claim 2, characterized in that, The telescopic locking mechanism includes: The pusher has one end linked to the drive device and the other end provided with a first ratchet tooth. The surface of the pusher is also provided with a first guide groove along the axial direction. A rotating component is rotatably connected to the first mating part. One end of the rotating component is provided with a second ratchet tooth capable of meshing with the first ratchet tooth. The surface of the rotating component is also provided with a second guide groove and a locking position along the axial direction. A limiting member is sleeved outside the pushing member and the rotating member. The inner wall of the limiting member is provided with a protruding rib that can slide in the first guide groove and the second guide groove. The protruding rib can selectively abut against the locking position.

4. The braking mechanism according to claim 3, characterized in that, The locking mechanism further includes a first reset member, which is used to provide a force to the rotating member to move away from the second mating part.

5. The braking mechanism according to any one of claims 2 to 4, characterized in that, The locking mechanism also includes: A sliding member is connected to the driving device and the telescopic locking mechanism, and is used to drive the telescopic locking mechanism to move.

6. The braking mechanism according to claim 1, characterized in that, The driving device includes a drive motor, a slider, and a drive rod. The drive motor is electrically connected to the power supply assembly. The slider can slide relative to the drive motor under the drive of the drive motor. The first end of the drive rod is fixed to the slider, and the second end of the drive rod is connected to the locking mechanism.

7. The braking mechanism according to claim 6, characterized in that, The driving device further includes a driving gear and a rack. The driving gear is fixed on the rotating shaft of the driving motor, and the rack is disposed on the sliding body and meshes with the driving gear. The driving motor can drive the driving gear to rotate, thereby driving the sliding body to slide relative to the driving motor.

8. The braking mechanism according to claim 6 or 7, characterized in that, The driving device further includes a fixed body, the driving motor is fixed to the fixed body, and the sliding body is slidably connected to the fixed body.

9. The braking mechanism according to claim 8, characterized in that, One of the fixed body and the sliding body is provided with a limiting protrusion, and the other is provided with a limiting groove. The limiting protrusion is slidably disposed in the limiting groove.

10. A baby stroller, characterized in that, The vehicle includes a frame, wheels, and a braking mechanism as described in any one of claims 1 to 9. The wheels are mounted on the frame, and the wheel hubs are provided with a plurality of second mating parts along the circumferential direction. When the first mating part is switched to the locked position, the first mating part engages with any one of the second mating parts; when the first mating part is switched to the unlocked position, the first mating part separates from the second mating parts.

Images