A baby stroller that automatically switches the wheel orientation and brake locking state after reversing

Abstract

The present invention discloses a baby stroller that automatically switches the wheel orientation and brake locking state after being reversed. The key lies in that on both the connecting crossbar between the front and rear frame components and the frame connector, there is an orientation and brake locking mechanism composed of a traction wheel, an orientation reset compression spring, an orientation pin, an orientation traction wire, a brake transmission part reset compression spring, a brake transmission part, a brake handle traction wire, a brake handle reset torsion spring, a brake handle, a brake handle positioning part, a brake handle positioning compression spring, a brake handle positioning pin, a brake handle reset part, a brake handle reset part compression spring, a brake handle reset pin, etc. A brake disc is provided on the wheel, and an orientation pin slot, a brake part, a brake reset part, a brake reset part reset compression spring, a brake part compression spring, etc. are provided on the wheel fork. A traction wheel transmission mechanism is respectively provided at the left and right hinge joints between the push rod assembly and the frame assembly. The present invention simplifies the operation steps of switching the wheel orientation and brake locking, making it more convenient and comfortable for consumers to use. Moreover, it has a simple structure, concise circuitry, reliable performance, and low cost.

Description

Technical Field

[0001] The present invention belongs to the field of baby strollers, and particularly relates to a baby stroller that automatically switches the wheel orientation and brake locking state after being reversed. Background Art

[0002] Nowadays, baby strollers that can be pushed in both directions are already quite common in the market, and users can choose whether the baby faces the forward direction or the user themselves when pushing the stroller according to their needs. In order to meet the needs of straight-line pushing, turning, and temporary parking in both directions, existing two-way push baby strollers usually come with wheel orientation and brake locking functions. However, most existing two-way push baby strollers still have the following problems:

[0003] 1. The orientation mechanism and the brake locking mechanism are independent of each other and are respectively controlled by their corresponding traction cables. Therefore, when it is necessary to release the orientation and brake of one pair of wheels, the orientation mechanism and the brake locking mechanism must be unlocked separately, which not only has cumbersome operation steps but also complex circuits.

[0004] 2. The orientation mechanisms on the front and rear sides do not automatically switch states after the push rod is reversed. Therefore, after the push rod is reversed, it is necessary to manually release the orientation of the wheels located on the front side of the pushing direction and lock the orientation of the wheels located on the front side of the pushing direction.

[0005] 3. The brake locking mechanisms on the front and rear sides do not automatically release the brake locking state of the wheels located on the front side of the pushing direction after the push rod is reversed. Therefore, after the push rod is reversed, users often forget to release the brake locking state of the wheels located on the front side of the pushing direction in advance, resulting in the situation that the baby stroller cannot be pushed.

[0006] 4. The orientation mechanisms and the brake locking mechanisms on the front and rear sides do not have a linkage function and cannot lock and unlock the front and rear wheels alternately. Therefore, when it is necessary to push forward, it is necessary to first release the orientation and brake of the front wheels, and then lock the orientation and brake of the rear wheels, further increasing the complexity of the operation.

[0007] 5. The braking action of the wheel brake assembly is a one-stage stroke. Therefore, when the brake piece cannot be inserted into the card slot of the brake disc in the first place, the brake piece cannot be driven by the brake transmission part and will also cause interference. In the long run, it will affect the braking effect at least and damage the brake assembly at worst. Summary of the Invention

[0008] In view of the defects in the prior art, the present invention provides a baby stroller that automatically switches the wheel orientation and brake locking state after being reversed, so as to solve the problems of complex structures of the orientation and brake locking mechanisms and cumbersome operation of switching the orientation and brake locking in existing two-way push baby strollers.

[0009] In order to solve the above technical problems and achieve the above technical effects, the present invention is implemented through the following technical solutions:

[0010] A baby stroller that automatically switches wheel orientation and brake locking state after reversing, comprising a frame assembly, the upper part of which is hinged with a push rod assembly that can be reversed forward and backward, and the bottoms of the left and right frame joints at the front and rear ends of the frame assembly are respectively provided with a universally rotatable wheel fork, and each of the wheel forks is respectively provided with a wheel;

[0011] A horizontally retractable directional pin is arranged inside each of the frame joints through a corresponding directional reset compression spring, and the left and right directional pins located in the front and the left and right directional pins located in the rear are respectively connected to a corresponding traction wheel through two left and right directional traction wires, and the two traction wheels are rotatably arranged on the connecting cross bars at the front and rear ends of the frame assembly, and the traction wheels control the left and right directional traction wires in the same direction to pull or release at the same time through their own forward and reverse rotations. When the directional traction wire is pulling, the directional pin connected thereto is retracted into the corresponding frame joint under the traction of the directional traction wire, and when the directional traction wire is released, the directional pin connected thereto extends out from the outer side surface of the lower part of the corresponding frame joint under the elastic force of the corresponding directional reset compression spring;

[0012] A vertically retractable brake transmission member is arranged inside each of the frame joints through a corresponding brake transmission member reset compression spring, a corresponding brake handle pull wire is connected between the left and right brake transmission members at the front and between the left and right brake transmission members at the rear through a plurality of guide wheels, the front and rear two brake handle pull wires are respectively connected to a corresponding brake handle transmission, the two brake handles are rotatably and resettably arranged on the connecting cross bars at the front and rear ends of the frame assembly through corresponding brake handle reset torsion springs, the two brake handle pull wires respectively pass through the through holes at the lower parts of the corresponding brake handles; when the brake handle is subjected to force, the brake handle drives the brake handle reset torsion spring to torsion The brake handle is tightened and rotated downward to compress the brake handle pull wire. When the brake handle is not under force, the brake handle is lifted upward under the elastic force of the brake handle reset torsion spring without compressing the brake handle pull wire. The brake handle controls the brake handle pull wire in the same direction to pull or release by lifting or pressing up or down. When the brake handle pull wire is pulling, the left and right brake transmission members connected thereto are simultaneously extended out of the lower side surfaces of the corresponding frame joints under the traction of the brake handle pull wire. When the brake handle pull wire is released, the left and right brake transmission members connected thereto are simultaneously retracted into the corresponding frame joints under the elastic force of the corresponding brake transmission member reset compression springs.

[0013] A brake handle positioning member is provided between the front traction wheel and the brake handle and between the rear traction wheel and the brake handle. The two brake handle positioning members are respectively fixedly connected to the connecting cross bars at the front and rear ends of the frame assembly. A horizontally retractable brake handle positioning pin is provided inside each brake handle positioning member through a corresponding brake handle positioning compression spring. The front and rear two brake handle positioning pins are respectively connected to the traction wheel in the same direction through a corresponding brake handle positioning traction wire. The traction wheel controls the brake handle positioning traction wire in the same direction to perform traction or release action through its own forward and reverse rotation. When the brake handle positioning traction wire performs traction action, The brake handle positioning pin connected thereto is retracted into the corresponding brake handle positioning piece under the traction of the brake handle positioning wire, and when the brake handle positioning wire is released, the brake handle positioning pin connected thereto extends out of the outer side surface of the corresponding brake handle positioning piece under the elastic force of the corresponding brake handle positioning compression spring; at the same time, a protruding brake handle positioning block is provided on the top of the brake handle, and a brake handle positioning hole is provided on the brake handle positioning block, which horizontally passes through the left and right surfaces of the brake handle positioning block. When the brake handle is pressed downward, the inner side opening of the brake handle positioning hole rotates downward to align with the protruding part of the brake handle positioning pin, so that the brake handle positioning pin extends into the brake handle positioning hole;

[0014] A corresponding brake handle reset member is respectively attached to the bottom of the front and rear brake handles, and the two brake handle reset members are respectively rotatably arranged on the connecting cross bars at the front and rear ends of the frame assembly, and the two brake handle reset members are respectively rotated synchronously with the corresponding brake handles through the brake handle reset torsion springs, and the top of each brake handle reset member has a protruding brake handle reset member contact portion extending upward from the upper surface of the corresponding brake handle; a brake handle reset member compression spring is connected between each brake handle reset member and the corresponding brake handle, and at the same time, a horizontally movable brake handle reset pin is arranged in the brake handle locating hole of each brake handle, and when the brake handle locating pin extends into the inner hole of the brake handle locating hole, the brake handle locating pin and one end of the brake handle reset pin The brake handle reset member contacts and pushes the other end of the brake handle reset member out of the outer opening of the brake handle positioning hole; when the brake handle reset member is in the initial state relative to the brake handle at this time, the brake handle reset member opens downward under the elastic force of the brake handle reset member compression spring, and the brake handle reset member contact portion of the brake handle reset member does not apply force to the brake handle reset pin; when the brake handle reset member is in a clamped state relative to the brake handle at this time, the brake handle reset member presses the brake handle reset member spring and lifts upward, and the brake handle reset member drives the brake handle reset member contact portion to push the brake handle reset pin back into the brake handle positioning hole, and the brake handle reset pin then pushes the brake handle positioning pin back into the brake handle positioning member, and the brake handle is lifted upward under the elastic force of the brake handle reset torsion spring without pressing the brake handle pulling wire;

[0015] On the inner side of the top of each fork, there is a positioning pin slot for plug-in cooperation with the positioning pin. When the positioning pin extends out of the outer surface of the lower part of the frame joint to which it belongs, the positioning pin is inserted into the corresponding positioning pin slot; on the inner side of each wheel, there is a brake disc coaxial with the wheel. The brake disc is a gear-shaped disc, and the grooves on the gear-shaped disc form brake part slots; on the inner surface of the inner bracket of each fork, there is a brake part sliding groove, and a slidable brake part is arranged in the brake part sliding groove; on the outer surface of the inner bracket of each fork, there is a brake return part sliding groove, and a slidable brake return part is arranged in the brake return part sliding groove. Between the bottom of the brake return part and the bottom of the brake return part sliding groove, there are two brake return part return compression springs; on the bottom of the brake return part, there is a brake part compression spring installation groove, and on the lower side of the brake part compression spring installation groove, there is an oval hole, and a slidable brake part sliding pin is arranged in the oval hole. The upper part of the brake part is located in the brake part compression spring installation groove, and the brake part sliding pin is fixedly connected to the upper part of the brake part through the brake part sliding pin. Between the top of the brake part and the top of the brake part compression spring installation groove, there is a brake part compression spring; when the brake is released, the bottom of the brake part moves to the highest position and does not contact the brake disc. At this time, both the brake return part return compression spring and the brake part compression spring are in a relaxed state. The top of the brake return part extends upward out of the top notch of the brake return part sliding groove under the action of the elastic force of the brake return part return compression spring so as to contact and cooperate with the brake transmission part. At the same time, the brake part is in a downward spring-open state in the brake part compression spring installation groove under the action of the elastic force of the brake part compression spring, and the brake part sliding pin is located at the bottom end of the oval hole; when in the waiting-for-brake state, the bottom of the brake part moves to the middle position and abuts against the convex block on the brake disc. At this time, the brake return part moves to the lower end of the brake return part sliding groove under the pressure of the brake transmission part, the brake return part return compression spring is in a compressed state, and at the same time, the extrusion brake part compression spring is in a compressed state under the pressure of the brake return part, and the brake part sliding pin is at the top end of the oval hole; when in the brake working state, the bottom of the brake part moves to the lowest position and is embedded in the brake part slot of the brake disc. At this time, the brake return part moves to the lower end of the brake return part sliding groove under the pressure of the brake transmission part, the brake return part return compression spring is in a compressed state, and at the same time, the brake part is in a downward spring-open state in the brake part compression spring installation groove under the action of the elastic force of the brake part compression spring, and the brake part sliding pin is located at the bottom end of the oval hole;

[0016] A first towing wheel transmission mechanism is provided at the hinge joint on the left side of the push rod assembly and the frame assembly, and a second towing wheel transmission mechanism is provided at the hinge joint on the right side of the push rod assembly and the frame assembly. The first towing wheel transmission mechanism and the second towing wheel transmission mechanism respectively control the rotation of one of the towing wheels in the front-rear direction, and the first towing wheel transmission mechanism and the second towing wheel transmission mechanism drive the corresponding towing wheels to rotate alternately as the push rod assembly changes direction;

[0017] The first towing wheel transmission mechanism includes a first transmission mechanism housing, a first transmission slider spring, a first transmission slider, a first eccentric member, and a first traction cable. The first transmission mechanism housing is hinged on the left side of the push rod assembly and the frame assembly, and the first transmission mechanism housing is fixed relative to the frame assembly. The first transmission slider is telescopically arranged inside the first transmission mechanism housing through the first transmission slider spring; one end of the first traction cable extends into the first transmission mechanism housing and is connected to the first transmission slider, and the other end of the first traction cable is connected to one of the corresponding towing wheels through the inside of the pipeline of the frame assembly; when the first transmission slider spring is in a relaxed state, one end of the first transmission slider extends out of the first transmission mechanism housing for the first eccentric member to contact and cooperate, and when the first transmission slider spring is in a compressed state, one end of the first transmission slider retracts into the first transmission mechanism housing to drive the corresponding towing wheel to rotate; the first transmission slider controls the first traction cable to perform a traction or release action through its telescopic movement inside the first transmission mechanism housing, and the first traction cable controls the forward and reverse rotation of the corresponding towing wheel through its own traction or release; the first eccentric member is arranged at the bottom end of the left push rod assembly and rotates together with the push rod assembly. When the push rod assembly changes direction to the rear, as the push rod assembly rotates, the protruding portion on the first eccentric member contacts the extended end of the first transmission slider and presses the first transmission slider into the first transmission mechanism housing. The first transmission slider spring is in a compressed state, and the first traction cable is in a traction state to drive the corresponding towing wheel to rotate forward. When the push rod assembly changes direction to the front, as the push rod assembly rotates, the smooth portion on the first eccentric member contacts the extended end of the first transmission slider. The first transmission slider spring is in a relaxed state, and the extended end of the first transmission slider is pushed outside the first transmission mechanism housing. The first traction cable is in a release state to drive the corresponding towing wheel to rotate in the reverse direction;

[0018] The second traction wheel drive mechanism includes a second drive mechanism housing, a second drive slider spring, a second drive slider, a second eccentric member, and a second traction cable. The second drive mechanism housing is hinged to the left side of the push rod assembly and the frame assembly, and the position of the second drive mechanism housing is fixed relative to the frame assembly. The second drive slider is telescopically arranged inside the second drive mechanism housing through the second drive slider spring. One end of the second traction cable extends into the second drive mechanism housing and is connected to the second drive slider, and the other end of the second traction cable is connected to one of the corresponding traction wheels through the inside of the pipeline of the frame assembly. When the second drive slider spring is in a relaxed state, one end of the second drive slider extends out of the second drive mechanism housing to facilitate the contact and cooperation with the second eccentric member. When the second drive slider spring is in a compressed state, one end of the second drive slider retracts into the second drive mechanism housing to drive the corresponding traction wheel to rotate. The second drive slider controls the traction or release action of the second traction cable by telescoping inside the second drive mechanism housing, and the second traction cable controls the forward and reverse rotation of the corresponding traction wheel through its own traction or release. The second eccentric member is arranged at the bottom of the push rod assembly on the left side and rotates together with the push rod assembly. When the push rod assembly changes direction to the front, with the rotation of the push rod assembly, the protruding part on the second eccentric member contacts the extended end of the second drive slider and presses the second drive slider into the second drive mechanism housing. The second drive slider spring is in a compressed state, and the second traction cable is in a traction state to drive the corresponding traction wheel to rotate forward. When the push rod assembly changes direction to the rear, with the rotation of the push rod assembly, the smooth part on the second eccentric member contacts the extended end of the second drive slider. The second drive slider spring is in a relaxed state, and the extended end of the second drive slider is pushed outside the second drive mechanism housing. The second traction cable is in a release state to drive the corresponding traction wheel to rotate in the reverse direction.

[0019] Further, the frame assembly is a foldable frame assembly.

[0020] Further, the wheel fork is rotatably arranged at the bottom of the corresponding frame joint through a wheel fork steering shaft.

[0021] Further, the top end of the brake transmission member extends out of the upper surface of the frame joint to avoid interfering with the stroke of the brake transmission member.

[0022] Further, an upper cover plate and a lower cover plate are jointly arranged on the frame joint and the connecting cross bar in the same direction.

[0023] Further, a traction cable tension adjustment block is provided on the upper surface of each brake lever positioning member, and the other end of each traction cable is in tensioned transmission connection with the corresponding traction wheel through the corresponding traction cable tension adjustment block.

[0024] Further, the traction wheel is located in the middle of the frame connection cross bar.

[0025] Further, one end of the brake lever return pin in contact with the contact part of the brake lever return member is semi-spherical, the width of the lower half of the contact part of the brake lever return member is greater than the width of its upper half, and the width of the lower half of the contact part of the brake lever return member gradually increases from top to bottom, so that the contact part of the brake lever return member can smoothly push the brake lever return pin into the brake lever positioning hole.

[0026] Further, anti-slip grooves for increasing friction are provided on the upper surface of the brake lever.

[0027] Further, a traction cable groove, a left-side directional traction wire groove, a right-side directional traction wire groove, and a brake lever positioning traction wire groove are circumferentially provided on the circumferential surface of the traction wheel, and traction cable fixing grooves, left-side directional traction wire fixing grooves, right-side directional traction wire fixing grooves, and brake lever positioning traction wire fixing grooves are respectively provided at the ends of the traction cable groove, the left-side directional traction wire groove, the right-side directional traction wire groove, and the brake lever positioning traction wire groove; the traction cable passes through the traction cable groove and is fixedly connected to the traction cable fixing groove, the left-side directional traction wire on the left side is fixedly connected through the left-side directional traction wire groove and the left-side directional traction wire fixing groove, the right-side directional traction wire on the right side is fixedly connected through the right-side directional traction wire groove and the right-side directional traction wire fixing groove, and the brake lever positioning traction wire is fixedly connected through the brake lever positioning traction wire groove and the brake lever positioning traction wire fixing groove.

[0028] Further, the traction cable is introduced from the right-side frame joint and fixedly connected to the traction cable fixing groove on the traction wheel, and both the brake lever and the brake lever return member are located on the right side of the traction wheel.

[0029] Further, the traction cable fixing groove is located on the left side at the top of the traction wheel, the left-side directional traction wire fixing groove is located on the right side at the top of the traction wheel, the right-side directional traction wire fixing groove is located on the left side at the bottom of the traction wheel, and the brake lever positioning traction wire fixing groove is located on the right side at the bottom of the traction wheel.

[0030] Further, the first traction wheel transmission mechanism is arranged at the left hinge joint of the push rod assembly and the frame assembly, and the first traction cable is fixedly connected to the traction cable fixing slot on the traction wheel in the front through the inside of the frame assembly on the left side, and the brake handle and the brake handle return member in the front are both close to the introduction direction of the first traction cable; the second traction wheel transmission mechanism is arranged at the right hinge joint of the push rod assembly and the frame assembly, and the first traction cable is fixedly connected to the traction cable fixing slot on the traction wheel in the rear through the inside of the frame assembly on the right side, and the brake handle and the brake handle return member in the rear are both close to the introduction direction of the second traction cable.

[0031] Further, the traction cable fixing slot is located on the left side at the top of the traction wheel, the left directional traction wire fixing slot is located on the right side at the top of the traction wheel, the right directional traction wire fixing slot is located on the left side at the bottom of the traction wheel, and the brake handle positioning traction wire fixing slot is located on the right side at the bottom of the traction wheel.

[0032] Further, the brake return member is inserted into the brake return member chute through the limiting chutes on both sides to ensure that the brake return member always slides up and down in the brake return member chute and prevent the brake return member from popping out of the brake return member chute.

[0033] Further, the brake member is composed of a brake member main body part, a brake member connecting part and a brake member working part. The brake member connecting part is connected to the top of the brake member main body part, and a brake member sliding pin through hole is provided on the brake member connecting part. The brake member working part is fixed on the outer side surface of the brake member main body part; during assembly, the brake member main body part is located inside the brake member chute (56), the brake member working part is located outside the brake member chute (56) and is used for plug-in cooperation with the brake member slot. The brake member connecting part is located in the brake member compression spring installation groove, and the brake member sliding pin in the waist-shaped hole passes through the brake member sliding pin through hole, and the top of the brake member connecting part contacts the bottom end of the brake member compression spring.

[0034] Further, the protruding parts of the first eccentric member and the second eccentric member respectively protrude from the smooth outer perimeters of their respective bodies, and the protruding part of the first eccentric member is located at the lower front side of its body, and the protruding part of the second eccentric member is located at the upper rear side of its body.

[0035] Further, first contact posts and second contact posts for facilitating the pushing of the first eccentric member and the second eccentric member are respectively arranged on the end faces of the protruding ends of the first transmission slider and the second transmission slider.

[0036] The beneficial effects of the present invention are:

[0037] 1. The present invention not only realizes that after the push rod assembly changes direction, the directional and brake locking mechanisms on the two sets of wheels in the front and rear directions automatically work alternately, but also realizes that a main traction cable is used to control a set of directional and brake locking mechanisms at the same time, and further realizes that a brake handle is used to control the brakes of a pair of wheels at the same time, achieving double braking with one step. That is, when the push rod assembly rotates to the rear, the two front wheels will automatically release the directional and brake locking at the same time and can freely turn and rotate, while the two rear wheels will automatically activate the directional locking and brake waiting for locking at the same time. The two rear wheels in this stage can only rotate in the front and rear directions. If the rear brake handle is further depressed, the two rear wheels will simultaneously and actively switch from brake waiting for locking to brake locking. The two rear wheels in this stage can neither rotate in direction nor rotate, and at the same time, the rear brake handle will be locked until the push rod assembly rotates to the front or a manual start of the brake handle reset part unlocks the brake handle locking; conversely, when the rod assembly rotates to the front, the states of the front and rear pairs of wheels are opposite to those before the push rod assembly changes direction.

[0038] 2. The present invention can realize that when the push rod assembly changes direction to one direction, the brake handle in the opposite direction can never be locked, thus preventing the accidental stepping on of the person in front of the push, and avoiding causing a pushing obstacle.

[0039] 3. The present invention realizes the two-stage locking action of the brake assembly. When the brake part aligns with the convex block of the brake disc but does not directly align with the brake part slot, the brake transmission part can still be squeezed downward within the compressible range of the brake part compression spring to prevent interference with the action of the brake transmission part. When the brake part realigns with the brake part slot of the brake disc, the brake part can be embedded in the brake part slot of the brake disc under the elastic force of the brake part compression spring, thereby realizing the braking of the wheels in two stages and avoiding damage to parts caused by the brake part not being able to be embedded in the brake part slot of the brake disc in the first time.

[0040] 4. The structure of the present invention is relatively simple, the circuit is concise, the performance is reliable, the safety is high, the manufacturing cost is low, and the most important thing is to simplify the operation steps of the wheel orientation and brake locking switching. The front and rear switching is completed in one go, which is very user-friendly and makes it more convenient and comfortable for consumers to use.

[0041] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following takes the preferred embodiments of the present invention and combines with the drawings to describe in detail as follows. The specific implementation manners of the present invention are given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings described herein are used to provide a further understanding of the present invention, and form a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0043] Figure 1 is a left perspective view of the present invention when the push rod assembly is switched to the rear;

[0044] Figure 2 is a right perspective view of the present invention when the push rod assembly is switched to the front;

[0045] Figure 3 is a left perspective view of the present invention when the push rod assembly is switched to the front;

[0046] Figure 4 is a right perspective view of the present invention when the push rod assembly is switched to the front;

[0047] Figure 5 is a schematic diagram of the commutation of the push rod assembly of the present invention;

[0048] Figure 6 is a perspective view of one set of the wheel orientation and brake locking mechanism of the present invention;

[0049] Figure 7 is a top view of one set of the wheel orientation and brake locking mechanism of the present invention;

[0050] Figure 8 is a front half-sectional view of the orientation locking assembly in the wheel orientation and brake locking mechanism of the present invention;

[0051] Figure 9 is a front half-sectional view of the brake locking assembly and the brake assembly in the wheel orientation and brake locking mechanism of the present invention;

[0052] Figure 10 is a front enlarged sectional view of the brake locking assembly in the wheel orientation and brake locking mechanism of the present invention;

[0053] Figure 11 is a top enlarged sectional view of the brake locking assembly in the wheel orientation and brake locking mechanism of the present invention;

[0054] Figure 12 is a side half-sectional view of the brake locking assembly in the wheel orientation and brake locking mechanism of the present invention;

[0055] Figure 13 is an assembly schematic diagram of the wheel and brake mechanism of the present invention after removing the spring;

[0056] Figure 14 is a side view of the wheel and brake mechanism of the present invention;

[0057] Figure 15This is the front view of the wheel and brake mechanism of the present invention;

[0058] Figure 16 This is the cross-sectional view of the brake mechanism of the present invention;

[0059] Figure 17 This is the three-dimensional view of the brake part in the brake mechanism of the present invention;

[0060] Figure 18 This is the three-dimensional view of the towing wheel of the present invention;

[0061] Figure 19 This is the assembly relationship diagram of the towing wheel, the directional towing wire and the towing cable of the present invention;

[0062] Figure 20 This is the assembly relationship diagram of the towing wheel and the brake handle positioning towing wire of the present invention;

[0063] Figure 21 This is the schematic diagram of the connection relationship between the left and right towing wheel drive mechanisms and the front and rear groups of wheel orientation and brake locking mechanisms of the present invention;

[0064] Figure 22 This is the structural schematic diagram of the first towing wheel drive mechanism when the push rod assembly is switched to the rear of the present invention;

[0065] Figure 23 This is the structural schematic diagram of the first towing wheel drive mechanism when the push rod assembly is switched to the front of the present invention;

[0066] Figure 24 This is the structural schematic diagram of the second towing wheel drive mechanism when the push rod assembly is switched to the rear of the present invention;

[0067] Figure 25 This is the structural schematic diagram of the second towing wheel drive mechanism when the push rod assembly is switched to the front of the present invention. Detailed implementation manners

[0068] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. The descriptions made herein are used to provide a further understanding of the present invention, form a part of this application, and the illustrative embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0069] See Figures 1-5 As shown, a baby stroller that automatically switches the wheel orientation and brake locking state after reversing includes a frame assembly 1. A push rod assembly 2 that can be reversed back and forth is hinged to the upper part of the frame assembly 1. A universal rotating wheel fork 4 is respectively arranged at the bottom of the left and right frame joints 3 at the front and rear ends of the frame assembly 1, and a wheel 5 is respectively arranged on each wheel fork 4;

[0070] See Figures 6-8As shown, inside each of the frame joints 3, there is respectively provided a horizontally telescopic positioning pin 8 through a corresponding directional reset compression spring 7. The left and right positioning pins 8 at the front and the left and right positioning pins 8 at the rear are respectively connected to a corresponding traction wheel 10 through two left and right directional traction wires 9. The two traction wheels 10 are respectively rotatably provided on the connecting crossbars 6 at the front and rear ends of the frame assembly 1. The traction wheels 10 control the simultaneous traction or release actions of the two left and right directional traction wires 9 in the same direction through their forward and reverse rotations. When the directional traction wire 9 performs a traction action, the connected positioning pin 8 retracts into the corresponding frame joint 3 under the traction of the directional traction wire 9. When the directional traction wire 9 performs a release action, the connected positioning pin 8 extends out of the outer side of the lower part of the corresponding frame joint 3 under the elastic force of the corresponding directional reset compression spring 7;

[0071] See Figures 6-7 As shown in FIGS. 9-12, inside each of the frame joints 3, there is respectively provided a vertically telescopic brake transmission member 12 through a corresponding brake transmission member reset compression spring 11. Between the left and right brake transmission members 12 at the front and between the left and right brake transmission members 12 at the rear, there is connected a corresponding brake lever traction wire 14 through a plurality of guide wheels 13. The front and rear brake lever traction wires 14 are respectively connected to a corresponding brake lever 15. The two brake levers 15 are respectively rotatably and resetably provided on the connecting crossbars 6 at the front and rear ends of the frame assembly 1 through corresponding brake lever reset torsion springs 16. The two brake lever traction wires 14 respectively pass through the through holes at the lower parts of their corresponding brake levers 15. When the brake lever 15 is stressed, the brake lever 15 drives the brake lever reset torsion spring 16 to be tightened and rotates downward to press the brake lever traction wire 14. When the brake lever 15 is not stressed, the brake lever 15 is lifted upward under the elastic force of the brake lever reset torsion spring 16 and does not press the brake lever traction wire 14. The brake lever 15 controls the traction or release actions of the same-direction brake lever traction wire 14 through its upward or downward movement. When the brake lever traction wire 14 performs a traction action, the connected left and right brake transmission members 12 extend out of the lower sides of their corresponding frame joints 3 simultaneously under the traction of the brake lever traction wire 14. When the brake lever traction wire 14 performs a release action, the connected left and right brake transmission members 12 retract into the corresponding frame joints 3 simultaneously under the elastic force of the corresponding brake transmission member reset compression springs 11;

[0072] A brake handle positioning member 17 is provided between the traction wheel 10 and the brake handle 15 at the front and between the traction wheel 10 and the brake handle 15 at the rear. The two brake handle positioning members 17 are respectively fixedly connected to the connecting cross bars 6 at the front and rear ends of the frame assembly 1. The interior of each brake handle positioning member 17 is respectively provided with a horizontally retractable brake handle positioning pin 19 through a corresponding brake handle positioning compression spring 18. The front and rear two brake handle positioning pins 19 are respectively transmission-connected to the traction wheel 10 in the same direction through a corresponding brake handle positioning traction wire 20. The traction wheel 10 controls the brake handle positioning traction wire 20 in the same direction to perform traction or release action through its own forward and reverse rotation. When the brake handle positioning traction wire 20 performs traction action, it is in contact with The brake handle positioning pin 19 connected thereto is retracted into the corresponding brake handle positioning member 17 under the traction of the brake handle positioning wire 20. When the brake handle positioning wire 20 is released, the brake handle positioning pin 19 connected thereto extends outward from the outer side of the corresponding brake handle positioning member 17 under the elastic force of the corresponding brake handle positioning compression spring 18. At the same time, a protruding brake handle positioning block 21 is provided on the top of the brake handle 15. A brake handle positioning hole 22 is provided on the brake handle positioning block 21 and horizontally passes through the left and right surfaces of the brake handle positioning block 21. When the brake handle 15 is pressed downward, the inner side opening of the brake handle positioning hole 22 rotates downward to align with the protruding portion of the brake handle positioning pin 19, so that the brake handle positioning pin 19 extends into the brake handle positioning hole 22.

[0073] A corresponding brake lever return member 23 is respectively attached to the lower sides of the front and rear brake levers 15. The two brake lever return members 23 are respectively rotatably arranged on the connecting cross bars 6 at the front and rear ends of the frame assembly 1. The two brake lever return members 23 respectively rotate synchronously with the corresponding brake levers 15 through the brake lever return torsion springs 16. And a protruding brake lever return member contact portion 25 protrudes upward from the top of each brake lever return member 23 out of the upper surface of the corresponding brake lever 15. A brake lever return member compression spring 24 is connected between each brake lever return member 23 and the corresponding brake lever 15. At the same time, a horizontally movable brake lever return pin 26 is arranged in the brake lever positioning hole 22 of each brake lever 15. When the brake lever positioning pin 19 extends into the inner orifice of the brake lever positioning hole 22, one end of the brake lever positioning pin 19 contacts the brake lever return pin 26 and pushes the other end of the brake lever return pin 26 out of the outer orifice of the brake lever positioning hole 22. When the brake lever return member 23 is in the initial state relative to the brake lever 15 at this time, the brake lever return member 23 opens downward under the elastic force of the brake lever return member compression spring 24, and the brake lever return member contact portion 25 of the brake lever return member 23 does not apply force to the brake lever return pin 26. When the brake lever return member 23 is in the clamped state relative to the brake lever 15 at this time, the brake lever return member 23 compresses the brake lever return member spring 24 and lifts upward, and the brake lever return member 23 drives the brake lever return member contact portion 25 to push the brake lever return pin 26 back into the brake lever positioning hole 22. The brake lever return pin 26 then pushes the brake lever positioning pin 19 back into the brake lever positioning member 17. The brake lever 15 lifts upward under the elastic force of the brake lever return torsion spring 16 and does not press the brake lever towing wire 14;

[0074] See Figures 6-9As shown in FIGS. 12 - 16, on the inner side surface of the top of each fork 4, a positioning pin slot 27 for plug - and - socket cooperation with the positioning pin 8 is provided. When the positioning pin 8 extends out of the outer surface of the lower part of the corresponding frame joint 3 to which it belongs, the positioning pin 8 is inserted into the corresponding positioning pin slot 27; on the inner side of each wheel 5, a brake disc 28 coaxial with the wheel 5 is provided. The brake disc 28 is a gear - shaped disc, and the grooves on the gear - shaped disc form brake part slots; on the inner surface of the inner bracket of each fork 4, a brake part sliding groove 56 is provided, and a slidable - up - and - down brake part 29 is arranged in the brake part sliding groove 56; on the outer surface of the inner bracket of each fork 4, a brake return part sliding groove 30 is provided, and a slidable - up - and - down brake return part 31 is arranged in the brake return part sliding groove 30. Between the bottom of the brake return part 31 and the bottom of the brake return part sliding groove 30, two brake return part return compression springs 32 are provided; on the bottom of the brake return part 31, a brake part compression spring installation groove 33 is provided. On the lower side surface of the brake part compression spring installation groove 33, a waist - shaped hole 34 is provided, and a slidable - up - and - down brake part sliding pin 35 is arranged in the waist - shaped hole 34. The upper part of the brake part 29 is located in the brake part compression spring installation groove 33, and the brake part sliding pin 35 is fixedly connected to the upper part of the brake part 29 through the brake part sliding pin 35. Between the top of the brake part 29 and the top of the brake part compression spring installation groove 33, a brake part compression spring 36 is provided; when in the brake - released state, the bottom of the brake part 29 moves to the highest position and does not contact the brake disc 28. At this time, both the brake return part return compression spring 32 and the brake part compression spring 36 are in a relaxed state. The top of the brake return part 31 extends upward out of the top notch of the brake return part sliding groove 30 under the elastic force of the brake return part return compression spring 32 so as to contact and cooperate with the brake transmission part 12. At the same time, the brake part 29 is in a downward - spring - open state in the brake part compression spring installation groove 33 under the elastic force of the brake part compression spring 36, and the brake part sliding pin 35 is located at the bottom end of the waist - shaped hole 34; when in the standby - brake state, the bottom of the brake part 29 moves to the middle position and abuts against the convex block on the brake disc 28. At this time, the brake return part 31 moves to the lower end of the brake return part sliding groove 30 under the pressure of the brake transmission part 12, the brake return part return compression spring 32 is in a compressed state, and at the same time, the extrusion brake part compression spring 36 is in a compressed state under the pressure of the brake return part 31, and the brake part sliding pin 35 is at the top end of the waist - shaped hole 34;When in the braking working state, the bottom of the brake member 29 moves to the lowest position and is embedded in the brake member slot of the brake disc 28. At this time, the brake return member 31 moves to the lower end of the brake return member chute 30 under the pressure of the brake transmission member 12, and the brake return member return compression spring 32 is in a compressed state. At the same time, the brake member 29 is in a downward spring-open state in the brake member compression spring mounting groove 33 under the elastic force of the brake member compression spring 36, and the brake member sliding pin 35 is located at the lowermost end of the kidney-shaped hole 34;

[0075] See Figure 21 As shown, a first towing wheel transmission mechanism 37a is provided at the hinge joint on the left side of the push rod assembly 2 and the frame assembly 1, and a second towing wheel transmission mechanism 37b is provided at the hinge joint on the right side of the push rod assembly 2 and the frame assembly 1. The first towing wheel transmission mechanism 37a and the second towing wheel transmission mechanism 37b respectively control the rotation of one of the towing wheels 10 in the front-rear direction, and the first towing wheel transmission mechanism 37a and the second towing wheel transmission mechanism 37b alternately drive the corresponding towing wheels 10 to rotate as the push rod assembly 2 changes direction;

[0076] See Figures 22-23As shown, the first traction wheel drive mechanism 37a includes a first drive mechanism housing 38a, a first drive slider spring 39a, a first drive slider 40a, a first eccentric member 41a, and a first traction cable 42a. The first drive mechanism housing 38a is hinged to the left side of the push rod assembly 2 and the frame assembly 1, and the position of the first drive mechanism housing 38a is fixed relative to the frame assembly 1. The first drive slider 40a is telescopically arranged inside the first drive mechanism housing 38a through the first drive slider spring 39a. One end of the first traction cable 42a extends into the first drive mechanism housing 38a and is connected to the first drive slider 40a, and the other end of the first traction cable 42a is connected to one of the corresponding traction wheels 10 through the inside of the pipeline of the frame assembly 1. When the first drive slider spring 39a is in a relaxed state, one end of the first drive slider 40a extends out of the first drive mechanism housing 38a for contact and cooperation with the first eccentric member 41a. When the first drive slider spring 39a is in a compressed state, one end of the first drive slider 40a retracts into the first drive mechanism housing 38a to drive the corresponding traction wheel 10 to rotate. The first drive slider 40a controls the first traction cable 42a to perform traction or release actions through telescoping inside the first drive mechanism housing 38a, and the first traction cable 42a controls the forward and reverse rotation of the corresponding traction wheel 10 through its own traction or release. The first eccentric member 41a is arranged at the bottom end of the left push rod assembly 2 and rotates together with the push rod assembly 2. When the push rod assembly 2 is reversed to the rear, with the rotation of the push rod assembly 2, the protruding part on the first eccentric member 41a contacts the extended end of the first drive slider 40a and presses the first drive slider 40a into the first drive mechanism housing 38a. The first drive slider spring 39a is in a compressed state, and the first traction cable 42a is in a traction state to drive the corresponding traction wheel 10 to rotate forward. When the push rod assembly 2 is reversed to the front, with the rotation of the push rod assembly 2, the smooth part on the first eccentric member 41a contacts the extended end of the first drive slider 40a. The first drive slider spring 39a is in a relaxed state, and the extended end of the first drive slider 40a is pushed outside the first drive mechanism housing 38a. The first traction cable 42a is in a release state to drive the corresponding traction wheel 10 to rotate in reverse;

[0077] See Figures 24-25As shown, the second traction wheel drive mechanism 37b includes a second drive mechanism housing 38b, a second drive slider spring 39b, a second drive slider 40b, a second eccentric member 41b, and a second traction cable 42b. The second drive mechanism housing 38b is hinged to the left side of the push rod assembly 2 and the frame assembly 1, and the second drive mechanism housing 38b is fixed relative to the frame assembly 1. The second drive slider 40b is telescopically arranged inside the second drive mechanism housing 38b through the second drive slider spring 39b. One end of the second traction cable 42b extends into the second drive mechanism housing 38b and is connected to the second drive slider 40b, and the other end of the second traction cable 42b is connected to one of the corresponding traction wheels 10 through the inside of the pipeline of the frame assembly 1. When the second drive slider spring 39b is in a relaxed state, one end of the second drive slider 40b extends out of the second drive mechanism housing 38b to facilitate the contact and cooperation with the second eccentric member 41b. When the second drive slider spring 39b is in a compressed state, one end of the second drive slider 40b retracts into the second drive mechanism housing 38b to drive the corresponding traction wheel 10 to rotate. The second drive slider 40b controls the second traction cable 42b to perform traction or release actions by telescoping inside the second drive mechanism housing 38b, and the second traction cable 42b controls the forward and reverse rotation of the corresponding traction wheel 10 through its own traction or release. The second eccentric member 41b is arranged at the bottom end of the left push rod assembly 2 and rotates together with the push rod assembly 2. When the push rod assembly 2 changes direction to the front, with the rotation of the push rod assembly 2, the protruding portion on the second eccentric member 41b contacts the extended end of the second drive slider 40b and presses the second drive slider 40b into the second drive mechanism housing 38b. The second drive slider spring 39b is in a compressed state, and the second traction cable 42b is in a traction state to drive the corresponding traction wheel 10 to rotate forward. When the push rod assembly 2 changes direction to the rear, with the rotation of the push rod assembly 2, the smooth portion on the second eccentric member 41b contacts the extended end of the second drive slider 40b. The second drive slider spring 39b is in a relaxed state, the extended end of the second drive slider 40b is pushed outside the second drive mechanism housing 38b, and the second traction cable 42b is in a release state to drive the corresponding traction wheel 10 to rotate in the reverse direction.

[0078] Further, the frame assembly 1 is a foldable frame assembly.

[0079] Further, as shown in Figures 6-9 and 13, the wheel fork 4 is rotatably arranged at the bottom of the corresponding frame joint 3 through a wheel fork steering shaft 43.

[0080] Further, referring to Figures 6-9 as shown, the top end of the brake transmission member 12 protrudes from the upper surface of the frame joint 3 to avoid interfering with the stroke of the brake transmission member 12.

[0081] Further, referring to Figures 1-4 as shown, an upper cover plate and a lower cover plate are commonly provided on the frame joint 3 and the connecting cross bar 6 in the same direction.

[0082] Further, referring to Figures 6-10 as shown, a traction cable tension adjusting block 44 is provided on the upper surface of each brake lever positioning member 17, and the other end of each traction cable 42 is in tension transmission connection with the corresponding traction wheel 10 through the corresponding traction cable tension adjusting block 44.

[0083] Further, the traction wheel 10 is located in the middle of the frame connecting cross bar 6.

[0084] Further, referring to Figure 7 and 9 as shown, the end of the brake lever return pin 26 in contact with the brake lever return member contact portion 25 is semi-spherical, the width of the lower half of the brake lever return member contact portion 25 is greater than the width of its upper half, and the width of the lower half of the brake lever return member contact portion 25 gradually increases from top to bottom, so that the brake lever return member contact portion 25 can smoothly push the brake lever return pin 26 into the brake lever positioning hole 22.

[0085] Further, referring to Figures 6-7 as shown, an anti-slip groove 55 for increasing friction is provided on the upper surface of the brake lever 15.

[0086] Further, referring to Figures 18-20As shown, a traction cable groove 45, a left-side directional traction wire groove 46, a right-side directional traction wire groove 47, and a brake lever positioning traction wire groove 48 are circumferentially arranged on the circumferential surface of the traction wheel 10. Traction cable fixing chucks 49, left-side directional traction wire fixing chucks 50, right-side directional traction wire fixing chucks 51, and brake lever positioning traction wire fixing chucks 52 are respectively arranged at the ends of the traction cable groove 45, the left-side directional traction wire groove 46, the right-side directional traction wire groove 47, and the brake lever positioning traction wire groove 48. The traction cable 42 passes through the traction cable groove 45 and is fixedly connected to the traction cable fixing chuck 49. The left-side directional traction wire is fixedly connected through the left-side directional traction wire groove 46 and the left-side directional traction wire fixing chuck 50. The right-side directional traction wire 9 passes through the right-side directional traction wire groove 47 and is fixedly connected to the right-side directional traction wire fixing chuck 51. The brake lever positioning traction wire 20 passes through the brake lever positioning traction wire groove 48 and is fixedly connected to the brake lever positioning traction wire fixing chuck 52.

[0087] Further, after the traction cable 42 is introduced from the right-side frame joint 3, it is fixedly connected to the traction cable fixing chuck 49 on the traction wheel 10. The brake lever 15 and the brake lever return member 23 are both located on the right side of the traction wheel 10.

[0088] Further, the traction cable fixing chuck 49 is located on the left side at the top of the traction wheel 10. The left-side directional traction wire fixing chuck 50 is located on the right side at the top of the traction wheel 10. The right-side directional traction wire fixing chuck 51 is located on the left side at the bottom of the traction wheel 10. The brake lever positioning traction wire fixing chuck 52 is located on the right side at the bottom of the traction wheel 10.

[0089] Further, a first traction wheel transmission mechanism 37a is arranged at the left hinge joint of the push rod assembly 2 and the frame assembly 1. The first traction cable 42a passes through the interior of the left-side frame assembly 1 and is fixedly connected to the traction cable fixing chuck 49 on the traction wheel 10 in the front. The brake lever 15 and the brake lever return member 23 in the front are both close to the introduction direction of the first traction cable 42a. A second traction wheel transmission mechanism 37b is arranged at the right hinge joint of the push rod assembly 2 and the frame assembly 1. The first traction cable 42a passes through the interior of the right-side frame assembly 1 and is fixedly connected to the traction cable fixing chuck 49 of the traction wheel 10 in the rear. The brake lever 15 and the brake lever return member 23 in the rear are both close to the introduction direction of the second traction cable 42b.

[0090] Further, the traction cable fixing card slot 49 is located on the left side of the top of the traction wheel 10, the left-side directional traction wire fixing card slot 50 is located on the right side of the top of the traction wheel 10, the right-side directional traction wire fixing card slot 51 is located on the left side of the bottom of the traction wheel 10, and the brake lever positioning traction wire fixing card slot 52 is located on the right side of the bottom of the traction wheel 10.

[0091] Further, the brake reset member 31 is inserted into the brake reset member chute 30 through the limit chutes on both sides to ensure that the brake reset member 31 always slides up and down in the brake reset member chute 30 and prevent it from popping out of the brake reset member chute 30.

[0092] Further, referring to Figure 17 As shown, the brake member 29 is composed of a brake member main body portion 291, a brake member connecting portion 292, and a brake member working portion 293. The brake member connecting portion 292 is connected to the top of the brake member main body portion 291, and a brake member sliding pin through hole 294 is provided on the brake member connecting portion 292. The brake member working portion 293 is fixed on the outer side surface of the brake member main body portion 291. During assembly, the brake member main body portion 291 is located inside the brake member chute 56, the brake member working portion 293 is located outside the brake member chute 56 for plug-in and mating with the brake member card slot. The brake member connecting portion 292 is located in the brake member spring mounting groove 33, and the brake member sliding pin 35 in the waist-shaped hole 34 passes through the brake member sliding pin through hole 294, and the top of the brake member connecting portion 292 contacts the bottom end of the brake member spring 36.

[0093] Further, referring to Figures 22-23 As shown, the protruding portions of the first eccentric member 41a and the second eccentric member 41b protrude from the smooth outer perimeters of their respective bodies. The protruding portion of the first eccentric member 41a is located at the lower front side of its body, and the protruding portion of the second eccentric member 41b is located at the upper rear side of its body.

[0094] Further, referring to Figures 23-25 As shown, first contact posts 56a and second contact posts 56b for facilitating the pushing of the first eccentric member 41a and the second eccentric member 41b are respectively provided on the end faces of the protruding ends of the first transmission slider 40a and the second transmission slider 40b.

[0095] Taking the example that the first traction wheel drive mechanism 37a is installed at the left hinge joint between the push rod assembly 2 and the frame assembly 1, the second traction wheel drive mechanism 37b is installed at the right hinge joint between the push rod assembly 2 and the frame assembly 1, and the first traction wheel drive mechanism 37a and the second traction wheel drive mechanism 37b respectively control the orientation and brake locking switching of the front wheels and the rear wheels, the working principle of the present invention will be described in detail. At the same time, for the convenience of description, here we define the opening direction of the baby seat or the baby carriage basket on the baby carriage as the front of the baby carriage.

[0096] When the push rod assembly 2 is reversed from the front to the rear, at this time the baby faces the pushing direction. As the push rod assembly 2 rotates, the protruding part on the first eccentric part 41a contacts the protruding end of the first transmission slider 40a and presses the first transmission slider 40a into the first transmission mechanism housing 38a, so that the first transmission slider spring 39a is compressed. At the same time, the first transmission slider 40a pulls the first traction cable 42a inward, so that the first traction cable 42a is in a traction state and then drives the traction wheel 10 located in the front to rotate forward.

[0097] As the traction wheel 10 in the front rotates forward, it simultaneously drives the left and right two orientation traction wires 9 in the front and the brake handle positioning traction wire 20 in the front to perform traction actions. On the one hand, the left and right two orientation traction wires 9 in the front respectively pull the left and right two orientation pins 8 in the front to retract into the corresponding frame joints 3, so that the left and right two orientation return compression springs 7 in the front and rear are compressed. At this time, the left and right two orientation pins 8 in the front do not plug into the orientation pin slots 27 on the left and right two wheel forks 4 in the front, that is, the two front wheels 5 are in an orientation unlocking state; on the other hand, the brake handle positioning traction wire 20 in the front pulls the connected brake handle positioning pin 19 to retract into the front brake handle positioning part 17, so that the front brake handle positioning compression spring 18 is compressed, causing the front brake handle positioning pin 19 to lose the ability to lock the front brake handle 15. The front brake handle 15 drives the front brake handle return part 23 to lift upward together under the elastic force of the front brake handle return torsion spring 16. At this time, the brake locking is in a failure state. No matter how the user steps on the front brake handle 15, it will not cause the front brake handle 15 to brake and lock.

[0098] In the case where the front brake lock fails, since the front brake lever 15 is lifted, the front brake lever traction wire 14 is not pressed and performs a release action. The left and right brake transmission members 12 connected to the front brake lever traction wire 14 are simultaneously retracted into the front left and right frame joints 3 under the elastic force of the front left and right brake transmission member return compression springs 11. At this time, the front left and right brake transmission members 12 do not press the brake return members 31 on the front left and right fork members 4.

[0099] Then, the tops of the front left and right brake return members 31 extend upward out of the top slots of the front left and right brake return member chutes 30 under the elastic force of the brake return member return compression springs 32. At the same time, the front left and right brake members 29 are in a state of springing downward in the front left and right brake member compression spring mounting grooves 33 under the elastic force of the brake member compression springs 36, so that the brake member sliding pins 35 are located at the lowermost ends of the waist-shaped holes 34. At this time, the bottoms of the front left and right brake members 29 both move to the highest positions and do not contact the front left and right brake discs 28, that is, the front left and right wheels 5 are both in a state of brake failure.

[0100] At the same time, as the push rod assembly 2 rotates from the front to the rear, the smooth part on the second eccentric member 41b contacts the protruding end of the second transmission slider 40b. The protruding end of the second transmission slider 40b is pushed out of the second transmission mechanism housing 38b under the elastic force of the second transmission slider spring 39b. At the same time, the second transmission slider 40b does not apply a pulling force to the second traction cable 42b, so that the second traction cable 42b is in a released state and drives the rear traction wheel 10 to rotate in the reverse direction.

[0101] The traction wheel 10 at the rear rotates in the reverse direction, and at the same time drives the two directional traction wires 9 at the rear and the brake handle positioning traction wire 20 at the rear to release. On the one hand, the left and right directional pins 8 at the rear connected to the left and right directional guide wires 9 at the rear extend outward from the outer side surfaces of the lower parts of the left and right frame joints 3 at the rear under the elastic force of the left and right directional reset compression springs 7 at the rear, and then the left and right wheel forks 4 at the rear will automatically straighten due to the pushing of the baby stroller, so that the side with the directional pin slots 27 faces inward. At this time, the left and right directional pins 8 at the rear are inserted into the directional pin slots 27 on the left and right wheel forks 4 at the rear, that is, the two wheels 5 at the rear are in a directional locking state; on the other hand, the brake handle positioning pin 19 connected to the brake handle positioning guide wire 20 at the rear extends out from the outer side surface of the brake handle positioning member 17 at the rear under the elastic force of the brake handle positioning compression spring 18 at the rear, so that the brake handle positioning pin 19 at the rear has the ability to lock the brake handle 15 at the rear. At this time, the user can step on the brake handle 15 at the rear to achieve the braking and brake locking of the rear wheel.

[0102] In the case where the rear brake handle locating pin 19 has the ability to lock the rear brake handle 15, when the rear brake handle 15 is still in the raised state, the rear brake handle locating pin 19 is offset from the brake handle locating hole 22 on the rear brake handle 15, and the brake handle locating pin 19 is still pressed by the inner surface of the rear brake handle 15 in the rear brake handle reset piece 23, that is, it is in the brake waiting to be locked state. When the rear brake handle 15 is stepped on, the rear brake handle reset piece 23 rotates downward together, and the inner hole of the brake handle positioning hole 22 on the rear brake handle 15 rotates downward to be aligned with the rear brake handle positioning pin 19. At this time, the rear brake handle positioning pin 19 can extend into the brake handle positioning hole 22 on the rear brake handle 15 under the elastic force of the brake handle positioning compression spring 18, thereby realizing the brake locking of the rear brake handle 15. Without switching the direction of the push rod assembly 2 or lifting the brake handle reset piece 23, the brake handle 15 can never be unlocked.

[0103] After the rear brake handle positioning pin 19 extends into the brake handle positioning hole 22 on the rear brake handle 15, it contacts one end of the brake handle reset pin 26 in the rear brake handle positioning hole 22 and pushes the other end out of the outer opening of the rear brake handle positioning hole 22, thereby providing a contact point for manual unlocking for the rear brake handle reset member 23. When the rear brake handle reset member 23 is not lifted, the rear brake handle reset member 23 is in an initial state relative to the rear brake handle 15. At this time, the rear brake handle reset member 23 opens downward under the elastic force of the rear brake handle reset member compression spring 24, so that the brake handle reset member contact portion 25 on the rear brake handle reset member 23 does not apply force to the protruding end of the rear brake handle reset pin 26. When the user needs to unlock the brake of the rear wheel in advance, he kicks the rear brake reset member 31 upward with his toes, so that the rear brake handle reset member 23 is clamped relative to the rear brake handle 15. At this time, the rear brake handle reset member 23 is lifted upward and the rear brake handle reset member spring 24 is compressed, so that the rear brake handle reset member 23 drives the brake handle reset member contact portion 25 thereon to push the rear brake handle reset pin 26 back into the rear brake handle positioning hole 22, and then continues to push the rear brake handle positioning pin 19 out of the rear brake handle positioning hole 22 and push it back into the rear brake handle positioning member 17. The rear brake handle 15 is lifted upward together with the rear brake handle reset member 23 under the elastic force of the rear brake handle reset torsion spring 16, and the rear brake handle positioning pin 19 is staggered with the brake handle positioning hole 22 on the rear brake handle 15 again, thereby realizing manual unlocking of the brake lock. Since the rear brake handle positioning wire 20 is still in the released state at this time, the rear brake handle positioning pin 19 still has the ability to lock the rear brake handle 15, that is, it is in the waiting brake locking state, and the rear wheel brake can be locked again by stepping on the rear brake handle 15 again.

[0104] When the rear brake handle 15 is simply pressed down or locked after being pressed down, the rear brake handle pull wire 14 is pressed downward and pulled due to the downward rotation of the rear brake handle 15. The left and right brake transmission members 12 connected to the rear brake handle pull wire 14 are pulled and extended out of the lower side of the left and right rear frame joints 3. Since the left and right rear forks 4 are automatically straightened due to the pushing of the baby stroller, the side with the brake reset member 31 faces inward. Therefore, at this time, the left and right rear brake transmission members 12 just press downward the brake reset members 31 on the left and right rear forks 4.

[0105] Next, two situations will be encountered during braking. The first situation is that when the rear brake member 29 is aligned with the brake member slot of the rear brake disc 28, the rear brake reset member 31 moves to the lower end of the rear brake reset member slot 30 under the pressure of the rear brake transmission member 12, and at the same time, the rear brake member 29 is in a downwardly popped state in the rear brake member compression spring installation slot 33 under the elastic force of the rear brake member compression spring 36, and the rear brake member sliding pin 35 slides to the waist-shaped hole The bottom end of 34 is formed by the rear brake member 29 being directly embedded in the brake member slot of the rear brake disc 28 at one time, that is, it is in the brake working state; the second situation is when the rear brake member 29 is just aligned with the protrusion of the rear brake disc 28, because the rear brake member 29 cannot be directly embedded in the brake member slot of the rear brake disc 28 at one time, the rear brake reset member 31 will first move to the rear brake reset member slide under the pressure of the rear brake transmission member 12. The lower end of the groove 30 is pressed and the brake reset member reset spring 32 is pressed at the rear. At the same time, the brake reset member 31 at the rear pushes the brake member 29 at the rear to slide downward through the extrusion brake member spring 36 at the rear until it contacts the protrusion of the brake disc 28 at the rear. As the brake reset member 31 at the rear is further pressed downward, the extrusion brake member spring 36 at the rear will continue to be pressed until the brake member sliding pin 35 at the rear moves to the top of the waist-shaped hole 34, which is now in a state of waiting for braking. Then the user only needs to It only needs to be pushed forward or backward a small distance to adjust the brake component 29 at the rear to align with the brake component slot of the brake disc 28 at the rear. At this time, the brake component 29 at the rear is in a downward-bounced state under the elastic force of the brake component compression spring 36 at the rear acting on the brake component compression spring mounting groove 33 at the rear, and the brake component sliding pin 35 at the rear slides to the bottom of the waist-shaped hole 34, so that the brake component 29 at the rear is embedded in the brake component slot of the brake disc 28 at the rear in stages and is in a braking working state.

[0106] When the push rod assembly 2 is reversed from the rear to the front, the baby is facing away from the pushing direction at this time. As the push rod assembly 2 rotates, the smooth part on the first eccentric member 41a contacts the protruding end of the first transmission slider 40a, and the protruding end of the first transmission slider 40a is pushed out of the first transmission mechanism housing 38a under the elastic force of the first transmission slider spring 39a. At the same time, the first transmission slider 40a does not apply a pulling force to the first towing cable 42a, so that the first towing cable 42a is in a released state and drives the rear traction wheel 10 to rotate in the reverse direction. At this time, the directional unlocking state of the two front wheels automatically switches to the directional locking state, and the brake unlocking state of the two front wheels also automatically switches to the brake waiting-to-lock state, waiting for the user to step on the brake lever when needed to brake the two front wheels and lock the brake lever.

[0107] At the same time, as the push rod assembly 2 rotates from the front to the rear, the protruding part on the second eccentric member 41b contacts the protruding end of the second transmission slider 40b and presses the second transmission slider 40b into the second transmission mechanism housing 38b, so that the second transmission slider spring 39b is compressed. At the same time, the second transmission slider 40b pulls the second towing cable 42b inward, so that the second towing cable 42b is in a traction state and drives the front traction wheel 10 to rotate forward. At this time, the directional locking state of the two rear wheels automatically switches to the directional unlocking state, and the brake locking state of the two rear wheels also automatically switches to the brake unlocking state, and at the same time, the working state of the brakes of the two rear wheels is automatically released.

[0108] In summary, the technical effects that can be achieved by the present invention are as follows: when the push rod assembly rotates to the rear of the baby carriage or the baby seat, the directional locking and brake locking of the two front wheels will be automatically released, and the two front wheels can freely turn and rotate, while the directional locking and brake waiting-to-lock of the two rear wheels will be automatically activated. At this stage, the two rear wheels can only rotate in the front and rear directions. If the rear brake lever is further stepped on, the two rear wheels will actively switch from the brake waiting-to-lock to the brake locking. At this stage, the two rear wheels can neither turn nor rotate, and at the same time, the rear brake lever will be locked until the push rod assembly rotates to the front or the brake lever reset member is manually activated to unlock the brake lever locking; when the rod assembly rotates to the front of the baby carriage or the baby seat, the directional locking and brake locking of the two rear wheels will be automatically released, and the two rear wheels can freely turn and rotate, while the directional locking and brake waiting-to-lock of the two front wheels will be automatically activated. At this stage, the two front wheels can only rotate in the front and rear directions. If the front brake lever is further stepped on, the two front wheels will actively switch from the brake waiting-to-lock to the brake locking. At this stage, the two front wheels can neither turn nor rotate, and at the same time, the front brake lever will be locked until the push rod assembly rotates to the rear or the brake lever reset member is manually activated to unlock the brake lever locking.

[0109] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A baby stroller that automatically switches the wheel orientation and brake locking state after reversing, characterized in that: The vehicle comprises a frame assembly (1), the upper part of which is hingedly connected to a push rod assembly (2) capable of switching directions forward and backward, and the bottoms of two left and right frame joints (3) at the front and rear ends of the frame assembly (1) are respectively provided with a universally rotatable wheel fork (4), and each wheel fork (4) is respectively provided with a wheel (5); Each of the frame joints (3) is provided with a horizontally retractable directional pin (8) through a corresponding directional reset compression spring (7). The two left and right directional pins (8) located in the front and the two left and right directional pins (8) located in the rear are respectively connected to a corresponding traction wheel (10) through two left and right directional traction wires (9). The two traction wheels (10) are rotatably arranged on the connecting cross bars (6) at the front and rear ends of the frame assembly (1). The traction wheel (10) controls the left and right directional traction wires (9) in the same direction to perform traction or release actions at the same time through its own forward and reverse rotation. When the directional traction wire (9) performs a traction action, the directional pin (8) connected thereto is retracted into the corresponding frame joint (3) under the traction of the directional traction wire (9). When the directional traction wire (9) performs a release action, the directional pin (8) connected thereto is extended out of the outer side surface of the lower part of the corresponding frame joint (3) under the elastic force of the corresponding directional reset compression spring (7); Each of the frame joints (3) is provided with a vertically retractable brake transmission member (12) through a corresponding brake transmission member reset compression spring (11); a corresponding brake handle pull wire (14) is connected between the left and right brake transmission members (12) at the front and between the left and right brake transmission members (12) at the rear through a plurality of guide wheels (13); the front and rear two brake handle pull wires (14) are respectively connected to a corresponding brake handle (15) in a transmission manner; the two brake handles (15) are rotatably and resettably arranged on the connecting cross bar (6) at the front and rear ends of the frame assembly (1) through corresponding brake handle reset torsion springs (16); the two brake handle pull wires (14) respectively pass through the through holes at the lower parts of the corresponding brake handles (15); when the brake handle (15) is subjected to force, the brake handle (15) drives the brake handle reset torsion springs (16) to rotate and reset. The spring (16) is tightened and rotated downward to compress the brake handle pull wire (14). When the brake handle (15) is not subjected to force, the brake handle (15) is lifted upward under the elastic force of the brake handle reset torsion spring (16) without compressing the brake handle pull wire (14). The brake handle (15) controls the brake handle pull wire (14) in the same direction to pull or release by lifting or pressing up or down. When the brake handle pull wire (14) is pulling, the left and right brake transmission members (12) connected thereto are simultaneously extended out of the lower side of the corresponding frame joint (3) under the traction of the brake handle pull wire (14). When the brake handle pull wire (14) is released, the left and right brake transmission members (12) connected thereto are simultaneously retracted into the inside of the corresponding frame joint (3) under the elastic force of the corresponding brake transmission member reset compression spring (11). A brake handle positioning member (17) is provided between the traction wheel (10) and the brake handle (15) at the front and between the traction wheel (10) and the brake handle (15) at the rear. The two brake handle positioning members (17) are respectively fixedly connected to the connecting cross bars (6) at the front and rear ends of the frame assembly (1). A horizontally retractable brake handle positioning pin (19) is provided inside each of the brake handle positioning members (17) through a corresponding brake handle positioning compression spring (18). The front and rear two brake handle positioning pins (19) are respectively transmission-connected to the traction wheel (10) in the same direction through a corresponding brake handle positioning traction wire (20). The traction wheel (10) controls the brake handle positioning traction wire (20) in the same direction to perform traction or release action through its own forward and reverse rotation. When the brake handle positioning traction wire (20) performs traction action, it is connected with the traction wheel (10) in the same direction. The brake handle positioning pin (19) connected thereto is retracted into the corresponding brake handle positioning piece (17) under the traction of the brake handle positioning wire (20); when the brake handle positioning wire (20) is released, the brake handle positioning pin (19) connected thereto extends out of the outer side surface of the corresponding brake handle positioning piece (17) under the elastic force of the corresponding brake handle positioning compression spring (18); at the same time, a protruding brake handle positioning block (21) is provided on the top of the brake handle (15); a brake handle positioning hole (22) is provided on the brake handle positioning block (21) and horizontally passes through the left and right surfaces of the brake handle positioning block (21); when the brake handle (15) is pressed downward, the inner side opening of the brake handle positioning hole (22) rotates downward to align with the protruding part of the brake handle positioning pin (19), so that the brake handle positioning pin (19) extends into the brake handle positioning hole (22); A brake lever return member (23) is respectively attached to the lower part of each of the front and rear brake levers (15). The two brake lever return members (23) are respectively rotatably arranged on the connecting cross bars (6) at the front and rear ends of the frame assembly (1). The two brake lever return members (23) respectively rotate synchronously with the corresponding brake levers (15) through the brake lever return torsion springs (16). And a protruding brake lever return member contact part (25) protrudes upward from the top of each brake lever return member (23) out of the upper surface of the corresponding brake lever (15). A brake lever return member compression spring (24) is connected between each brake lever return member (23) and the corresponding brake lever (15). At the same time, a horizontally movable brake lever return pin (26) is arranged in the brake lever positioning hole (22) of each brake lever (15). When the brake lever positioning pin (19) extends into the inner orifice of the brake lever positioning hole (22), one end of the brake lever positioning pin (19) contacts the brake lever return pin (26) and pushes the other end of the brake lever return pin (26) out of the outer orifice of the brake lever positioning hole (22). When the brake lever return member (23) is in the initial state relative to the brake lever (15) at this time, the brake lever return member (23) opens downward under the elastic force of the brake lever return member compression spring (24), and the brake lever return member contact part (25) of the brake lever return member (23) does not apply force to the brake lever return pin (26). When the brake lever return member (23) is in the clamped state relative to the brake lever (15) at this time, the brake lever return member (23) compresses the brake lever return member compression spring (24) and lifts upward, and the brake lever return member (23) drives the brake lever return member contact part (25) to push the brake lever return pin (26) back into the brake lever positioning hole (22). The brake lever return pin (26) then pushes the brake lever positioning pin (19) back into the brake lever positioning member (17). The brake lever (15) lifts upward under the elastic force of the brake lever return torsion spring (16) and does not press the brake lever towing wire (14). On the inner side of the top of each fork (4), there is a positioning pin slot (27) for plug-in cooperation with the positioning pin (8). When the positioning pin (8) extends out of the outer surface of the lower part of the corresponding frame joint (3), the positioning pin (8) is inserted into the corresponding positioning pin slot (27); on the inner side of each wheel (5), there is a brake disc (28) coaxial with the wheel (5). The brake disc (28) is a gear-shaped disc, and the grooves on the gear-shaped disc form a brake part slot; on the inner surface of the inner bracket of each fork (4), there is a brake part sliding groove (56), and a slidable brake part (29) is arranged in the brake part sliding groove (56); on the outer surface of the inner bracket of each fork (4), there is a brake return part sliding groove (30), and a slidable brake return part (31) is arranged in the brake return part sliding groove (30). Between the bottom of the brake return part (31) and the bottom of the brake return part sliding groove (30), there are two brake return part return compression springs (32); at the bottom of the brake return part (31), there is a brake part compression spring installation groove (33). On the lower side surface of the brake part compression spring installation groove (33), there is an oval hole (34), and a slidable brake part sliding pin (35) is arranged in the oval hole (34). The upper part of the brake part (29) is located in the brake part compression spring installation groove (33), and the brake part sliding pin (35) is fixedly connected to the upper part of the brake part (29) through the brake part sliding pin (35). Between the top of the brake part (29) and the top of the brake part compression spring installation groove (33), there is a brake part compression spring (36); when in the brake release state, the bottom of the brake part (29) moves to the highest position and does not contact the brake disc (28). At this time, both the brake return part return compression spring (32) and the brake part compression spring (36) are in a relaxed state. The top of the brake return part (31) extends upward out of the top notch of the brake return part sliding groove (30) under the elastic force of the brake return part return compression spring (32) to contact and cooperate with the brake transmission part (12). At the same time, the brake part (29) is in a downward spring-open state in the brake part compression spring installation groove (33) under the elastic force of the brake part compression spring (36), and the brake part sliding pin (35) is located at the bottom end of the oval hole (34); when in the pending brake state, the bottom of the brake part (29) moves to the middle position and abuts against the convex block on the brake disc (28). At this time, the brake return part (31) moves to the lower end of the brake return part sliding groove (30) under the pressure of the brake transmission part (12). The brake return part return compression spring (32) is in a compressed state, and at the same time, the brake part compression spring (36) is compressed under the pressure of the brake return part (31), and the brake part sliding pin (35) is at the top end of the oval hole (34).When in the braking working state, the bottom of the brake member (29) moves to the lowest position and is embedded in the brake member slot of the brake disc (28). At this time, the brake return member (31) moves to the lower end of the brake return member chute (30) under the pressure of the brake transmission member (12), and the brake return member return compression spring (32) is in a compressed state. At the same time, the brake member (29) is in a state of bouncing downward in the brake member compression spring mounting groove (33) under the elastic force of the brake member compression spring (36), and the brake member sliding pin (35) is located at the lowermost end of the kidney-shaped hole (34); A first towing wheel transmission mechanism (37a) is arranged at the hinge joint between the push rod assembly (2) and the left side of the frame assembly (1), and a second towing wheel transmission mechanism (37b) is arranged at the hinge joint between the push rod assembly (2) and the right side of the frame assembly (1). The first towing wheel transmission mechanism (37a) and the second towing wheel transmission mechanism (37b) respectively control the rotation of one of the towing wheels (10) in the front and rear directions. And the first towing wheel transmission mechanism (37a) and the second towing wheel transmission mechanism (37b) alternately drive the corresponding towing wheels (10) to rotate as the push rod assembly (2) changes direction. The first traction wheel drive mechanism (37a) includes a first drive mechanism housing (38a), a first drive slider spring (39a), a first drive slider (40a), a first eccentric member (41a), and a first traction cable (42a). The first drive mechanism housing (38a) is hinged to the left side of the push rod assembly (2) and the frame assembly (1), and the position of the first drive mechanism housing (38a) is fixed relative to the frame assembly (1). The first drive slider (40a) is telescopically arranged inside the first drive mechanism housing (38a) through the first drive slider spring (39a). One end of the first traction cable (42a) extends into the first drive mechanism housing (38a) and is connected to the first drive slider (40a), and the other end of the first traction cable (42a) is connected to one of the corresponding traction wheels (10) through the inside of the pipeline of the frame assembly (1). When the first drive slider spring (39a) is in a relaxed state, one end of the first drive slider (40a) extends out of the first drive mechanism housing (38a) to facilitate contact and cooperation with the first eccentric member (41a). When the first drive slider spring (39a) is in a compressed state, one end of the first drive slider (40a) retracts into the first drive mechanism housing (38a) to drive the corresponding traction wheel (10) to rotate. The first drive slider (40a) controls the first traction cable (42a) to perform traction or release actions by telescoping inside the first drive mechanism housing (38a), and the first traction cable (42a) controls the forward and reverse rotation of the corresponding traction wheel (10) through its own traction or release. The first eccentric member (41a) is arranged at the bottom end of the left push rod assembly (2) and rotates together with the push rod assembly (2). When the push rod assembly (2) changes direction to the rear, with the rotation of the push rod assembly (2), the protruding part on the first eccentric member (41a) contacts the extended end of the first drive slider (40a) and presses the first drive slider (40a) into the first drive mechanism housing (38a). The first drive slider spring (39a) is in a compressed state, and the first traction cable (42a) is in a traction state to drive the corresponding traction wheel (10) to rotate forward. When the push rod assembly (2) changes direction to the front, with the rotation of the push rod assembly (2), the smooth part on the first eccentric member (41a) contacts the extended end of the first drive slider (40a). The first drive slider spring (39a) is in a relaxed state, and the extended end of the first drive slider (40a) is pushed outside the first drive mechanism housing (38a). The first traction cable (42a) is in a release state to drive the corresponding traction wheel (10) to rotate in the reverse direction; The second traction wheel drive mechanism (37b) includes a second drive mechanism housing (38b), a second drive slider spring (39b), a second drive slider (40b), a second eccentric member (41b), and a second traction cable (42b). The second drive mechanism housing (38b) is hinged to the left side of the push rod assembly (2) and the frame assembly (1), and the second drive mechanism housing (38b) is fixed relative to the frame assembly (1). The second drive slider (40b) is telescopically arranged inside the second drive mechanism housing (38b) through the second drive slider spring (39b). One end of the second traction cable (42b) extends into the second drive mechanism housing (38b) and is connected to the second drive slider (40b), and the other end of the second traction cable (42b) is connected to one of the corresponding traction wheels (10) through the inside of the pipeline of the frame assembly (1). When the second drive slider spring (39b) is in a relaxed state, one end of the second drive slider (40b) extends out of the second drive mechanism housing (38b) for contact and cooperation with the second eccentric member (41b). When the second drive slider spring (39b) is in a compressed state, one end of the second drive slider (40b) retracts into the second drive mechanism housing (38b) to drive the corresponding traction wheel (10) to rotate. The second drive slider (40b) controls the second traction cable (42b) to perform traction or release actions through telescoping inside the second drive mechanism housing (38b), and the second traction cable (42b) controls the forward and reverse rotation of the corresponding traction wheel (10) through its own traction or release. The second eccentric member (41b) is arranged at the bottom end of the left push rod assembly (2) and rotates together with the push rod assembly (2). When the push rod assembly (2) changes direction to the front, with the rotation of the push rod assembly (2), the protruding portion on the second eccentric member (41b) contacts the extended end of the second drive slider (40b) and presses the second drive slider (40b) into the second drive mechanism housing (38b). The second drive slider spring (39b) is in a compressed state, and the second traction cable (42b) is in a traction state to drive the corresponding traction wheel (10) to rotate forward. When the push rod assembly (2) changes direction to the rear, with the rotation of the push rod assembly (2), the smooth portion on the second eccentric member (41b) contacts the extended end of the second drive slider (40b). The second drive slider spring (39b) is in a relaxed state, and the extended end of the second drive slider (40b) is pushed out of the second drive mechanism housing (38b). The second traction cable (42b) is in a release state to drive the corresponding traction wheel (10) to rotate in the reverse direction.

2. The baby stroller that automatically switches the wheel orientation and brake locking state after reversing according to claim 1, characterized in that: The frame assembly (1) is a foldable frame assembly.

3. The baby stroller that automatically switches the wheel orientation and brake locking state after reversing according to claim 1, characterized in that: The wheel fork (4) is rotatably arranged at the bottom of the corresponding frame joint (3) through a wheel fork steering shaft (43).

4. The baby stroller that automatically switches the wheel orientation and brake locking state after reversing according to claim 1, characterized in that: The top end of the brake transmission part (12) protrudes from the upper surface of the frame joint (3) to avoid interfering with the stroke of the brake transmission part (12).

5. The baby stroller that automatically switches the wheel orientation and brake locking state after reversing according to claim 1, wherein: Upper and lower covers are jointly arranged on the frame joint (3) and the connecting cross bar (6) in the same direction.

6. The baby stroller that automatically switches the wheel orientation and brake locking state after reversing according to claim 1, characterized in that: A traction cable tension adjustment block (44) is arranged on the upper surface of each brake lever positioning part (17), and the other end of each traction cable is in tension transmission connection with the corresponding traction wheel (10) through the corresponding traction cable tension adjustment block (44).

7. The baby stroller that automatically switches the wheel orientation and brake locking state after reversing according to claim 1, wherein: The circumferential surface of the traction wheel (10) is circumferentially provided with a traction cable groove (45), a left-side directional traction wire groove (46), a right-side directional traction wire groove (47) and a brake lever positioning traction wire groove (48), and the ends of the traction cable groove (45), the left-side directional traction wire groove (46), the right-side directional traction wire groove (47) and the brake lever positioning traction wire groove (48) are respectively provided with a traction cable fixing card slot (49), a left-side directional traction wire fixing card slot (50), a right-side directional traction wire fixing card slot (51) and a brake lever positioning traction wire fixing card slot (52); the traction cable passes through the traction cable groove (45) and is fixedly connected with the traction cable fixing card slot (49), the left-side directional traction wire passes through the left-side directional traction wire groove (46) and is fixedly connected with the left-side directional traction wire fixing card slot (50), the right-side directional traction wire (9) passes through the right-side directional traction wire groove (47) and is fixedly connected with the right-side directional traction wire fixing card slot (51), and the brake lever positioning traction wire (20) passes through the brake lever positioning traction wire groove (48) and is fixedly connected with the brake lever positioning traction wire fixing card slot (52).

8. The baby stroller that automatically switches the wheel orientation and brake locking state after reversing according to claim 7, characterized in that: The first traction wheel transmission mechanism (37a) is arranged at the hinge joint on the left side of the push rod assembly (2) and the frame assembly (1), and the first traction cable (42a) passes through the inside of the left-side frame assembly (1) and is fixedly connected with the traction cable fixing card slot (49) on the traction wheel (10) in the front, and the brake lever (15) and the brake lever return part (23) in the front are both close to the introduction direction of the first traction cable (42a); the second traction wheel transmission mechanism (37b) is arranged at the hinge joint on the right side of the push rod assembly (2) and the frame assembly (1), and the first traction cable (42a) passes through the inside of the right-side frame assembly (1) and is fixedly connected with the traction cable fixing card slot (49) of the traction wheel (10) in the rear, and the brake lever (15) and the brake lever return part (23) in the rear are both close to the introduction direction of the second traction cable (42b).

9. The baby stroller that automatically switches the wheel orientation and brake locking state after reversing according to claim 8, characterized in that: The traction cable fixing card slot (49) is located on the left side of the top of the traction wheel (10), the left directional traction wire fixing card slot (50) is located on the right side of the top of the traction wheel (10), the right directional traction wire fixing card slot (51) is located on the left side of the bottom of the traction wheel (10), and the brake lever positioning traction wire fixing card slot (52) is located on the right side of the bottom of the traction wheel (10).

10. The baby stroller that automatically switches the wheel orientation and brake locking state after reversing according to claim 1, characterized in that: The brake member (29) is composed of a brake member main body portion (291), a brake member connecting portion (292) and a brake member working portion (293). The brake member connecting portion (292) is connected to the top of the brake member main body portion (291), and a brake member sliding pin through hole (294) is provided on the brake member connecting portion (292). The brake member working portion (293) is fixed on the outer side surface of the brake member main body portion (291). During assembly, the brake member main body portion (291) is located inside the brake member sliding groove (56), the brake member working portion (293) is located outside the brake member sliding groove (56) for plug-in cooperation with the brake member card slot, the brake member connecting portion (292) is located in the brake member compression spring installation groove (33), and the brake member sliding pin (35) located in the waist-shaped hole (34) passes through the brake member sliding pin through hole (294), and the top of the brake member connecting portion (292) contacts the bottom end of the brake member compression spring (36).

Images