Baby balance bike

Abstract

Provided is a baby balance bike, comprising a bike body, wherein a rear end of the bike body is provided with a mounting hole (10), a rear push rod (7) is inserted into the mounting hole by means of a detachable connection structure, the bike body is provided with an accommodating structure for accommodating the detached rear push rod, the accommodating structure is an accommodating tube hole (16) formed on the bike body, an accommodating device enabling the rear push rod to be kept in the accommodating tube hole is arranged between the rear push rod and the accommodating tube hole, and a tail end of the rear push rod is exposed relative to the accommodating tube hole when being inserted into the accommodating tube hole. The baby balance bike has an accommodating function. The detached rear push rod can be accommodated, the length of the bike body is adjustable, and the height, front-to-back position, and orientation of a seat (6) are all adjustable. Transformation and use between different types of bikes can be achieved, thereby realizing a single bike with a plurality of purposes.

Description

A baby carriage Technical Field

[0001] The invention belongs to the technical field of children's vehicles and relates to a multifunctional children's vehicle. Background Art

[0002] Children's strollers are essential toys for children's growth and development. Widely used and widely available, they provide children with a wealth of fun while also developing their limb strength and flexibility. Currently, existing strollers are limited in functionality, ranging from two-wheeled balance bikes or tricycles designed solely for riding to seated strollers that parents can push. This necessitates that every family have multiple strollers to meet the needs of children at different stages of development, significantly increasing childcare costs.

[0003] To this end, some people have designed children's cars with switchable functions, such as China's invention patent CN206826822U. The push rod and the push handle of the children's car are detachably connected to the vehicle. When the child is too young to ride, the car can be used as a child stroller. When the child is older, the parents can remove the push rod and the push handle to realize the conversion from the child stroller to a children's tricycle, thereby increasing the functions and extending the service life.

[0004] However, after the push rod and the push handle of the baby stroller are disassembled, there is nowhere to store them. If the disassembly is completed before going out, it is relatively easy to handle. However, when converting outdoors, the removed push rod and the push handle have nowhere to be stored and parents have to carry them with them, which brings a lot of inconvenience.

[0005] When used as a stroller, a steering structure is also required, which allows the parent behind the stroller to control the steering function when pushing the stroller. For example, Chinese invention patent CN108583757B discloses a foldable maternal and infant tricycle, in which a rotating gear is pivotally connected to the front end of the vehicle beam, and the rotating gear can mesh with the gear portion on the handle. One end of the push rod is rotatably connected to the ear plate (hooked at the ear plate), and the other end is rotatably connected to the rotating gear (also hooked). The parent pushes the handle behind the stroller to rotate the rotating sleeve, which drives the push rod on the corresponding side to extend forward, and the other push rod to retract, driving the rotating gear to rotate, and the rotating gear drives the gear portion to rotate, thereby controlling the steering. The push rods at both ends of this type of steering structure need to be rotatably connected to the corresponding parts. Considering the need to minimize the assembly clearance, assembly is difficult. In addition, the components will experience rotational wear over time, and the fit clearance will increase, making it difficult to guarantee the service life.

[0006] Another example is Chinese invention patent CN204223082U, which describes a multifunctional children's stroller that can be used as a balance bike or tricycle. Because the locking mechanism between the two rod elements relies solely on a latch mechanism, the locking point is close to the hinge point of the rod elements, and there are few locking points, resulting in unstable locking and prone to shaking at the rear wheel end.

[0007] In addition, common children's stroller seats are fixed on the frame, but since children now grow rapidly, the seats of children's strollers are relatively low. Children's strollers that have been bought not long ago may not be suitable for children to ride because they lack complete size adjustment functions. Technical issues

[0008] The purpose of the present invention is to solve the above-mentioned problems existing in existing baby carriages and to provide a multifunctional baby carriage. Technical Solutions

[0009] A baby carriage includes a carriage body, characterized in that a mounting hole is provided at the rear end of the carriage body, a rear push rod is inserted into the mounting hole through a detachable connecting structure, a storage structure is provided on the carriage body for storing the removed rear push rod, the storage structure is a storage tube hole provided on the carriage body, a storage device is provided between the rear push rod and the storage tube hole to keep the rear push rod in the storage tube hole, and after the rear push rod is inserted into the storage tube hole, the end is exposed relative to the storage tube hole.

[0010] In the above-mentioned baby stroller, an end cover is further provided at the outer end of the storage tube hole for covering the exposed portion of the rear push rod.

[0011] In the above-mentioned baby stroller, the baby stroller also includes a blocking piece, which can only block the above-mentioned mounting hole or the outer port of the storage tube hole, or can selectively block the above-mentioned mounting hole or the outer port of the storage tube hole. The mounting hole and the storage tube hole are interconnected, and the blocking piece can only block one of the mounting hole and the outer port of the storage tube hole, and the other one is not blocked. Or the blocking piece can match the mounting hole and the outer port of the storage tube hole to achieve blocking, but there is only one blocking piece. When the mounting hole is in use, the blocking piece blocks the outer port of the storage tube hole, and when the rear push rod is stored, the blocking piece blocks the mounting hole, and one of the two can be selected. The blocking piece can be a flip-up cover plate, which can automatically block the outer port of the storage tube hole when the rear push rod is pulled out of the storage tube hole, and can flip to avoid it when the rear push rod is inserted into the storage tube hole. A similar blocking piece at the mounting hole may also be a cover that can be flipped or moved up and down. When the rear push rod is pulled out, it blocks the mounting hole. When the rear push rod is inserted, it can move downward or flip to avoid it.

[0012] In the above-mentioned baby carriage, the blocking member includes a first cover plate and a second cover plate for blocking the mounting hole and the storage tube hole respectively. The two cover plates are connected together on a rotating shaft and are in a "V" shape. The blocking member is set in an inner cavity connected to the storage tube hole and the mounting hole through the rotation of the rotating shaft. When the above-mentioned rear push rod is inserted from the mounting hole, it can push open the first cover plate and drive the second cover plate to cover the outer port of the storage tube hole. When the rear push rod is inserted from the outer port of the storage tube hole, it can push open the second cover plate and drive the first cover plate to cover the mounting hole.

[0013] In the above-mentioned baby carriage, the blocking member includes a blocking member and a connecting rope, one end of the connecting rope is connected to the vehicle body, and the other end is connected to the blocking member, and the blocking member can cooperate with the above-mentioned mounting hole or the outer port of the storage tube hole to block.

[0014] In the above-mentioned baby stroller, the shapes and positions of the mounting hole and the outer ends of the storage tube hole correspond to each other, so that one of them can overlap with the other after rotating around the connection point between the connecting rope and the stroller body.

[0015] In the above-mentioned children's stroller, the body includes a beam, a handlebar stem, a handle assembly, a front wheel assembly, a rear wheel assembly and a seat. The handlebar stem is arranged at the front end of the beam, the upper end is connected to the handle assembly, and the lower end is connected to the front wheel assembly. The seat and the rear wheel assembly are arranged on the beam.

[0016] In the above-mentioned baby carriage, the storage structure includes a storage space that is opened inside the carriage beam and can communicate with the outside.

[0017] In the above-mentioned baby carriage, the storage space is a storage tube hole whose shape and size match the rear push rod. A storage device is provided between the rear push rod and the storage tube hole to keep the rear push rod in the storage tube hole, and the end of the rear push rod is exposed relative to the storage tube hole.

[0018] In the above-mentioned baby carriage, the storage device includes a card slot opened on the rear push rod and a clamping ring arranged in the storage tube hole. After the rear push rod is inserted into the storage tube hole and is in place, the clamping ring can be clamped into the corresponding card slot, so that the rear push rod is locked in the axial direction of the storage tube hole. An unlocking mechanism is also provided between the clamping ring and the vehicle beam.

[0019] In the above-mentioned baby carriage, a force-storage elastic member is provided in the storage tube hole or on the rear push rod. When the rear push rod is inserted into the storage tube hole, the force-storage elastic member is compressed.

[0020] In the above-mentioned baby carriage, the clamping slot is annular, the clamping ring is C-shaped, and its opening faces the clamping slot and can cooperate with the clamping slot.

[0021] In the above-mentioned baby carriage, the storage device is an internal thread provided on the inner wall of the storage tube hole, and an external thread is provided at the corresponding position of the rear push rod, and the rear push rod is threadedly connected to the storage tube hole.

[0022] In the above-mentioned stroller, the storage device is a tight fit between the rear push rod and the storage tube hole. After the rear push rod is inserted into the storage tube hole, the tight fit between the two prevents the rear push rod from sliding out.

[0023] In the above-mentioned baby stroller, the storage structure includes a clamping member arranged on the outside of the stroller beam, which can clamp the removed rear push rod.

[0024] In the aforementioned baby stroller, a steering hole is formed at the rear end of the vehicle beam, a rotating seat is disposed in the steering hole, and a storage passage is formed on the rotating seat for the rear push rod to pass through when stored. The storage passage is connected to the storage space. After the rear push rod is removed from the mounting hole, it can be inserted from the storage passage into the storage space for storage.

[0025] In the above-mentioned baby carriage, the extension line of the mounting hole is cross-connected with the storage channel.

[0026] In the above-mentioned stroller, the detachable connection structure includes a first unlocking button, a latch and an elastic member. The elastic member and the latch are arranged in the rear push rod. The latch can simultaneously pass through the side walls of the rear push rod and the rotating seat (that is, the side walls of the mounting hole) under the elastic force of the elastic member to combine the rear push rod and the rotating seat. The above-mentioned first unlocking button can push the outer end of the latch away from the rotating seat to separate the rear push rod and the rotating seat.

[0027] In the above-mentioned baby carriage, the elastic member is a spring sheet, which is V-shaped, with one end abutting against the inner wall of the rear push rod and the other end abutting against the inner end of the above-mentioned latch.

[0028] In the above-mentioned baby carriage, an unlocking slot is provided on the vehicle beam, and the above-mentioned first unlocking button is arranged in the unlocking slot. The outer end of the first unlocking button is exposed, and the inner end can abut against the outer end of the above-mentioned pin. A first return spring that can control the return of the first unlocking button is also provided between the first unlocking button and the unlocking slot.

[0029] In the above-mentioned children's stroller, a steering mechanism is also provided between the rear push rod and the handlebar upright. The steering mechanism includes two pull rods. The above-mentioned rotating seat can rotate relative to the steering hole. The two pull rods are arranged on both sides of the vehicle beam. The handlebar upright is rotatably connected to the vehicle beam through a first rotating shaft. The rotating seat is located on both sides of its own rotation center and is provided with top blocks corresponding to the above-mentioned pull rods one by one. The two above-mentioned pull rods are made of hard material and one end abuts against the corresponding top block, and the other end passes through the vehicle beam and abuts against the abutment surface of the handlebar upright. The two abutment surfaces corresponding to the two uprights are respectively located on both sides of the first rotating shaft.

[0030] In the above-mentioned children's stroller, a connecting seat is fixedly provided on the handlebar upright on the side facing the vehicle beam, and the connecting seat is rotatably connected to the front end of the vehicle beam through the above-mentioned first rotating shaft. The front end of the vehicle beam has an arc-shaped rotation matching groove, and the shape of one end of the connecting seat connected to the vehicle beam matches the above-mentioned rotation matching groove, and the center of the circle corresponding to the arc surface of the above-mentioned rotation matching groove is the above-mentioned first rotating shaft.

[0031] In the above-mentioned baby carriage, the front end of the vehicle beam is provided with a connector protruding from the surface of the rotationally mating groove, the above-mentioned connecting seat is provided with a socket corresponding to the connector, the connector is inserted into the socket, and the above-mentioned first rotating shaft is provided on the connector.

[0032] In the above-mentioned baby carriage, the abutting surface is located on the inner wall of the insertion hole.

[0033] In the above-mentioned baby carriage, a guide channel is provided in the vehicle beam, and the above-mentioned pull rod passes through the corresponding guide channel.

[0034] In the above-mentioned baby carriage, an inner wall of the steering hole is provided with an inner avoidance groove for the pull rod and / or the top block to move around.

[0035] In the above-mentioned baby carriage, an outer side of the rotating seat is provided with an outer avoidance groove for the pull rod to avoid movement.

[0036] In the above-mentioned baby carriage, the mounting hole is provided on the rotating seat and is multi-deformable. The shape of the lower end of the rear push rod matches the shape of the mounting hole, and the lower end of the rear push rod is fitted and inserted into the multi-deformable mounting hole.

[0037] In the above-mentioned baby carriage, the rear push rod includes a rod body and a handle rotatably arranged on the top of the rod body, and an angle maintaining mechanism is provided between the handle and the rod body to maintain a corresponding angle between the handle and the rod body.

[0038] In the above-mentioned baby carriage, the angle maintaining mechanism includes a locking pin and a locking reset structure that makes the locking pin have a tendency to extend outward. The locking pin and the locking reset structure are arranged in the mounting cavity of the rod body. At least two locking holes are opened around the hinge axis at one end of the handle hinged to the rod body. The locking holes are divided into a straight locking hole and at least one angle locking hole. When the above-mentioned handle rotates around the hinge axis, the locking holes can be aligned with the locking pin in turn. At this time, the outer end of the locking pin can extend from the mounting cavity and be inserted into the corresponding locking hole so that the handle and the rod body are locked together.

[0039] In the above-mentioned baby carriage, the locking and resetting structure includes a second resetting spring, and two ends of the second resetting spring act on the inner wall of the installation cavity and the locking pin respectively.

[0040] In the above-mentioned baby carriage, the locking and resetting mechanism also includes a mounting seat and a resetting block. The above-mentioned locking pin is fixed on the resetting block and extends toward the hinge axis. A guide inclined surface is provided on the mounting seat. The resetting block can move relative to the mounting seat along the guide inclined surface so that the locking pin extends toward the hinge axis or away from the hinge axis. The above-mentioned second resetting spring acts on the resetting block so that the resetting block always rests on the above-mentioned guide inclined surface.

[0041] In the above-mentioned baby carriage, a reset slot is further provided on the mounting seat to provide movement space for the locking pin when it moves with the reset block.

[0042] In the above-mentioned baby carriage, a buckle is provided on the mounting seat, and the side wall of the rod body is provided with a mounting opening connected to the mounting cavity. The buckle is provided with a mounting inclined surface along the mounting direction for facilitating pressing the mounting seat into the mounting opening, and a stop block that cooperates with the buckle is correspondingly provided in the mounting cavity.

[0043] In the above-mentioned baby carriage, two connecting plates are spaced apart at the upper end of the rod body, and the handle is arranged between the two connecting plates and is hinged to the connecting plates on both sides through a hinge shaft.

[0044] In the above-mentioned baby carriage, the rod body includes an inner tube and an outer tube, one end of the inner tube is connected to the above-mentioned handle, and the other end is inserted into the tube hole of the outer tube. A plurality of first gear holes are opened on the wall of the outer tube along the length direction, and an elastic gear pin is provided on the inner tube. When the elastic gear pin is inserted into different first gear holes, the length of the inner tube extending out of the outer tube is adjusted.

[0045] In the above-mentioned baby carriage, the rear wheel assembly includes a rear wheel frame, a rear fork assembly and a rear wheel. The rear wheel frame is arranged on the above-mentioned vehicle beam, and the rear wheel is arranged on the rear wheel frame through the rear fork assembly.

[0046] In the above-mentioned baby stroller, the rear fork assembly includes two rear fork rods, one end of each rear fork rod is provided with an adapter and is rotatably connected to the rear wheel frame, and the other end is connected to the rear wheel. The two rear fork rods swing around the axis of their respective adapters to make the two rear wheels approach or separate. The baby stroller also includes a front locking device and a rear locking device. Both locking devices are used to lock and maintain the opening and closing angles of the two rear fork rods. The front locking device acts on the two adapters, and the rear locking device is arranged between the front locking device and the rear wheel, and acts on the rear fork rod.

[0047] In the above-mentioned stroller, the front locking device includes a front card block and a front unlocking device. Locking slots are provided on the outer sides of the two adapters. The corresponding locking slots on the two adapters are grouped in pairs. The front card block can be simultaneously inserted into the two locking slots in the same group to limit the rotation of the adapter. The front unlocking device controls the movement of the front card block so that the front card block can switch between the locked position and the unlocked position.

[0048] In the above-mentioned baby stroller, each adapter has at least two locking snaps, which are divided into a closing snap and at least one unfolding snap.

[0049] In the above-mentioned baby stroller, the outer side of the adapter is further provided with a section of teeth, and the teeth of the two adapters mesh with each other. The two adapters maintain synchronization of swinging through the meshing of the teeth.

[0050] In the above-mentioned baby carriage, the front unlocking device includes a front unlocking button and a front return spring. A front guide groove is provided on the rear wheel frame for the reciprocating movement of the front clamping block and the front unlocking button. One end of the front unlocking button is exposed, and the other end extends into the front guide groove and can push the front clamping block to move. The front clamping block is set in the front guide groove, and the front return spring controls the front clamping block to reset after the external force is released.

[0051] In the above-mentioned baby stroller, a front avoidance notch is provided on the side of one end of the front card block facing the front unlocking button. When the front avoidance notch and the locking card slot are in the same plane, the distance between the side wall of the avoidance notch and the central axis of the adapter is greater than the radius of the adapter.

[0052] In the above-mentioned baby stroller, the rear locking device includes a rear clamping block and a rear unlocking device, an arc-shaped upper locking plug is provided on the inner side of one rear fork rod, and an arc-shaped lower locking plug is provided on the inner side of the other rear fork rod, the upper locking plug and the lower locking plug are stacked up and down, and at least two locking notches are provided on the upper locking plug and the lower locking plug, which are divided into a closed notch and at least one expanded notch. When the two locking plugs swing with their respective rear fork rods, the upper and lower locking notches of the two locking plugs can be aligned with each other in a locked position, or the two corresponding expanded notches can be aligned with each other in an expanded state. The rear clamping block can simultaneously engage with the upper and lower corresponding locking notches to limit the swinging of the two rear fork rods, and the rear unlocking device controls the movement of the rear clamping block to switch the rear clamping block between the locked position and the unlocked position.

[0053] In the above-mentioned baby carriage, the rear unlocking device includes a rear unlocking button and a rear return spring. A rear guide groove is provided on the rear wheel frame for the reciprocating movement of the rear clamping block and the rear unlocking button. One end of the rear unlocking button is exposed, and the other end extends into the rear guide groove and can push the rear clamping block to move. The rear clamping block is set in the rear guide groove, and the rear return spring controls the rear clamping block to reset after the external force is removed.

[0054] In the above-mentioned baby carriage, a rear avoidance notch is provided on the side of one end of the rear clamping block facing the rear unlocking button.

[0055] In the above-mentioned baby carriage, the front clamping block and the rear clamping block are integrated into a whole, the front guide groove and the rear guide groove are connected into a whole, and the front unlocking button and the rear unlocking button are integrated into a whole.

[0056] In the above-mentioned baby carriage, the multifunctional baby carriage also includes two pedals, which are detachably connected to both sides of the front wheel. Two pedal plug holes are provided on the rear wheel frame, and a supporting member is fixedly connected to the rear wheel frame. When the above-mentioned pedals are inserted into the corresponding pedal plug holes, the pedals of the pedals rest on the supporting member.

[0057] In the above-mentioned baby carriage, the rear wheel frame and the seat can move forward and backward relative to the vehicle beam respectively, and do not interfere with each other during movement. A locking mechanism is provided between the rear wheel frame and the vehicle beam for locking the relative position of the rear wheel frame and the vehicle beam, and a locking mechanism is provided between the seat and the vehicle beam for locking the relative position of the seat and the vehicle beam.

[0058] In the above-mentioned baby carriage, a storage locking position is also provided on the beam, and a limiting piece is provided on the rear wheel frame. When the locking mechanism is unlocked, the rear wheel frame is pushed to move toward the front wheel until the above-mentioned limiting piece enters the storage locking position to form a storage state.

[0059] In the above-mentioned baby carriage, the locking mechanism includes a button 1 arranged on the rear wheel frame and a lock hole opened on the vehicle beam. Several lock holes are arranged at intervals along the length direction of the vehicle beam. A slide groove is opened on the rear wheel frame. The button 1 is slidably arranged in the slide groove along the length direction of the vehicle beam. The outer end of the button 1 extends out of the slide groove. A locking block is also provided in the slide groove. The inner end of the button 1 abuts against the locking block. The abutting surface between the button 1 and the locking block is an inclined surface. A limit block is fixed on the lock block. The limit block extends into the vehicle beam. When the button 1 is pressed, the button 1 pushes the lock block up and down through the inclined abutting surface to make the limit block. A reset spring is also provided in the slide groove to push the lock block to reset, so that the limit block is inserted into the lock hole to form a lock.

[0060] In the above-mentioned baby carriage, the second locking mechanism includes a second button arranged on the seat and a card hole opened on the vehicle beam, and several card holes are arranged at intervals along the length direction of the vehicle beam. The seat is provided with a second slide groove, and the second button is slidably arranged in the second slide groove along the length direction of the slider. The outer end of the second button extends out of the second slide groove, and a push block is also provided in the second slide groove. The inner end of the second button is against the push block, and the abutment surface between the second button and the push block is an inclined surface. A pin is fixed on the push block. When the second button is pressed, the second button pushes the push block up and down through the inclined abutment surface, so that the pin exits the card hole to form unlocking. The second slide groove is also provided with a second reset spring for pushing the push block to reset, so that the pin is inserted into the card hole to form locking.

[0061] In the above-mentioned baby stroller, the locking mechanism includes a button 3 movably arranged on the rear wheel frame, a positioning hole provided on the rear wheel frame, and a positioning post movably provided on the vehicle beam, wherein the plurality of positioning holes are arranged at intervals along the length direction of the vehicle beam. When the rear wheel frame moves forward and backward along the vehicle beam, the positioning posts can correspond to each positioning hole one by one. An elastic member is further provided in the vehicle beam for driving the positioning posts to insert into the positioning holes to form a lock; the button 3 is slidably arranged on the rear wheel frame along the length direction of the vehicle beam, a sliding cavity is provided on the button 3, a positioning block is movably provided in the sliding cavity, the button 3 is provided with a plurality of inclined guide grooves, the positioning block is fixedly provided with a plurality of guide posts corresponding to each inclined guide groove one by one, the guide posts are inserted into the inclined guide grooves, and the positioning block is lifted and lowered relative to the button 3 along the inclined guide groove by the guide posts; a plurality of protrusions corresponding to the positions of the positioning holes one by one are fixed on the bottom of the positioning block, and the button 3 is pressed, and the button 3 pushes the positioning block down, so that the protrusions extend into the positioning holes and the positioning posts are withdrawn from the positioning holes to form an unlocking.

[0062] In the above-mentioned baby stroller, the locking mechanism 2 includes a button 4 movably arranged on the seat, a mounting hole 2 provided on the seat, and a mounting post movably provided on the vehicle beam, wherein the plurality of mounting holes 2 are arranged at intervals along the length direction of the vehicle beam. When the seat moves forward and backward along the vehicle beam, the mounting posts can correspond one-to-one with each mounting hole 2. An elastic member 2 is further provided in the vehicle beam for driving the mounting posts to insert into the mounting holes 2 to form a lock; the button 4 is slidably arranged on the seat along the length direction of the vehicle beam, a sliding cavity is provided on the button 4, and a mounting block is movably provided in the sliding cavity. The button 4 is provided with a plurality of oblique slots, and the mounting block is fixedly provided with a plurality of guide blocks corresponding one-to-one to each oblique slot. The guide blocks are inserted into the oblique slots, and the mounting block is lifted and lowered relative to the button 4 along the oblique slots by the guide blocks; a plurality of protrusions corresponding one-to-one to the positions of the plurality of mounting holes 2 are fixed on the bottom of the mounting block. When the button 4 is pressed, the button 4 pushes the mounting block down, so that the protrusions extend into the mounting holes 2 and the mounting posts are withdrawn from the mounting holes 2 to form an unlocking.

[0063] In the above-mentioned baby carriage, a circular limiting hole is further provided on the carriage beam, and the limiting hole serves as the above-mentioned storage locking position.

[0064] In the above-mentioned baby carriage, the limiting hole is located between two locking holes.

[0065] In the above-mentioned baby carriage, the limiting part includes a ball, and a mounting hole 2 is provided on the rear wheel frame. The extension direction of the mounting hole 2 is perpendicular to the movement direction of the rear wheel frame, and the upper end of the mounting hole 2 passes through the rear wheel frame. The ball is arranged in the mounting hole 2 and can be raised and lowered along the mounting hole 2. A return spring 3 is also provided in the mounting hole 2 to push the ball to press against the vehicle beam; when the locking mechanism 1 is unlocked, the rear wheel frame is pushed to move toward the front wheel until the position of the ball corresponds to the position of the limiting hole, and the return spring 3 pushes the ball to be stuck in the limiting hole to form a lock.

[0066] In the above-mentioned baby carriage, the top surface of the beam is provided with a plurality of upper card slots, and the bottom surface of the beam is provided with a plurality of lower card slots, the upper card slots and the lower card slots respectively extend along the length direction of the beam, and the bottom of the seat is fixed with a plurality of upper card blocks corresponding to each upper card slot one by one, the upper card blocks are embedded in the corresponding upper card slots and translate along the upper card slots; the top of the rear wheel frame is fixed with a plurality of lower card blocks corresponding to each lower card slot one by one, the lower card blocks are embedded in the corresponding lower card slots and translate along the lower card slots.

[0067] In the above-mentioned baby carriage, an anti-unhooking device is further provided on the vehicle beam to prevent the rear wheel frame and the seat from falling off the vehicle beam.

[0068] In the above-mentioned baby carriage, the seat includes a base and a cushion, the base is slidably arranged on the vehicle beam, the above-mentioned cushion is arranged on the base, an adjustment rod is provided between the cushion and the base, an adjustment channel is provided at the bottom of the cushion or the upper end surface of the base, one end of the adjustment rod is inserted into the adjustment channel and rises and falls along the adjustment channel, and the other end is fixedly connected to the base or the cushion, and an upper and lower locking mechanism is provided between the adjustment rod and the adjustment channel for locking the relative position of the adjustment rod and the adjustment channel; the base is slidably arranged on the frame front and back, and a limiting mechanism is also provided between the base and the frame for locking the relative position of the base and the frame; a reversing mechanism is also provided between the cushion and the base for turning the cushion around and making the cushion orientation mirror-symmetrical to the original orientation.

[0069] In the above-mentioned baby carriage, the upper and lower locking mechanisms include a button five movably arranged on the base, a lock hole two provided on the adjustment channel, and a lock block two provided on the adjustment rod. Several lock holes two are arranged at intervals along the moving direction of the seat cushion. When the seat cushion is raised or lowered relative to the base, the lock blocks two can correspond one-to-one with each lock hole two. The button five is fixed with several push rods corresponding one-to-one to the position of each lock hole two; the lock block two is arranged on the adjustment rod for transverse sliding, and a return spring one is also provided in the seat cushion for pushing the lock block two to move horizontally so that the lock block two is inserted into the lock hole two to form a lock. The button five is arranged on the base for transverse sliding, and the sliding direction of the button five is consistent with the sliding direction of the lock block two. Pressing the button five causes each push rod to be inserted into the lock hole two and push the lock block two out of the lock hole two to form an unlocking.

[0070] In the above-mentioned multi-directionally adjustable baby carriage, the limit mechanism includes a button six and a second push block, a plurality of second card holes are provided on the frame, and the plurality of second card holes are arranged at intervals along the length direction of the frame, and a slide groove is provided on the base, and the button six is ​​slidably arranged in the slide groove along the length direction of the slider, and the outer end of the button six extends out of the slide groove, and the inner end of the button six abuts against the second push block, and the abutment surface between the button six and the second push block is an inclined surface, and a limit block two is fixedly provided on the second push block. When the button six is ​​pressed, the button six pushes the second push block up and down through the inclined abutment surface, so that the limit block two exits the second card hole to form unlocking, and a reset spring four is also provided in the slide groove for pushing the second push block to reset, so that the limit block two is inserted into the second card hole to form locking.

[0071] In the above-mentioned multi-directionally adjustable baby stroller, the limiting mechanism includes a button 5 movably arranged on the base, a positioning hole 2 provided on the base, and a positioning column 2 movably provided on the frame. The plurality of positioning holes 2 are arranged at intervals along the length direction of the frame. When the base moves forward and backward along the frame, the positioning columns 2 can correspond one-to-one with each positioning hole 2. An elastic member 3 is further provided in the frame for driving the positioning columns 2 to insert into the positioning holes 2 to form a lock; the button 5 is slidably arranged on the base along the length direction of the frame, and a sliding cavity is provided on the button 5. A positioning block 2 is movably provided in the sliding cavity, and the button 5 is provided with a plurality of inclined guide grooves 2. The positioning block 2 is fixedly provided with a plurality of guide columns 2 corresponding one-to-one to each inclined guide groove 2. The guide columns 2 are inserted into the inclined guide grooves 2, and the positioning block 2 is lifted and lowered relative to the button 5 along the inclined guide grooves 2 through the guide columns 2; the bottom of the positioning block 2 is fixedly provided with a plurality of protrusions 2 corresponding one-to-one to the positions of the positioning holes 2. When the button 5 is pressed, the button 5 pushes the positioning block 2 down, so that the protrusions 2 extend into the positioning holes 2 and the positioning columns 2 withdraw from the positioning holes 2 to form an unlocking.

[0072] In the above-mentioned baby carriage, at least one lock hole 2 is shaped as a waist-shaped hole, and the other lock holes 2 are shaped as round holes. The shape of the locking block 2 is adapted to the shape of the round hole. When the locking block 2 is located in the waist-shaped hole, the seat cushion can move back and forth along the waist-shaped hole through the locking block 2.

[0073] In the above-mentioned baby carriage, a backrest is provided on the seat cushion.

[0074] In the above-mentioned baby carriage, the reversing mechanism includes two locking blocks 2 arranged on the adjusting rod, and the two locking blocks 2 are symmetrically arranged relative to the center of the adjusting rod, and the seat cushion plane is perpendicular to the axis of the adjusting rod; pressing button 5, push one of the locking blocks 2 out of the lock hole 2, thereby unlocking the seat cushion, pulling the adjusting rod out of the adjustment channel, rotating the seat cushion to reverse, and inserting the adjusting rod into the adjustment channel, so that the other locking block 2 is inserted into the lock hole 2 to form a lock.

[0075] In the above-mentioned baby carriage, the reversing mechanism includes two locking blocks 2 arranged on the adjusting rod, and the two locking blocks 2 are symmetrically arranged relative to the center of the adjusting rod. The plane of the seat cushion intersects with the axis of the adjusting rod and is not perpendicular, and the seat cushion is rotated and arranged at the upper end of the adjusting rod; press button 5, push one of the locking blocks 2 out of the lock hole 2, thereby unlocking the seat cushion, pull the adjusting rod out of the adjustment channel, rotate the seat cushion to reverse, and insert the adjusting rod into the adjustment channel, so that the other locking block 2 is inserted into the lock hole 2 to form a lock, and rotate the seat cushion to a horizontal position.

[0076] In the above-mentioned baby carriage, the reversing mechanism includes two adjustment channels opened on the base, the two adjustment channels and the two upper and lower locking mechanisms are arranged symmetrically with respect to the center of the base, and the seat cushion plane intersects with the axis of the adjustment rod and is not perpendicular; press button five, push the locking block two out of the lock hole two to unlock the seat cushion, pull the adjusting rod out of the adjustment channel, rotate the seat cushion to reverse, and insert the adjusting rod into the other adjustment channel, so that the locking block two is inserted into the lock hole two of the other adjustment channel to form a lock.

[0077] In the above-mentioned baby carriage, the reversing mechanism includes a crossbeam fixed on the frame and a sliding sleeve fixed on the base. The base is horizontally slidably set on the crossbeam through the sliding sleeve. The above-mentioned limiting mechanism is arranged between the base and the crossbeam. Each second clamping hole is opened on the crossbeam. The plane of the seat cushion is perpendicular to the axis of the adjusting rod; press button six to unlock the base, pull the base and seat cushion horizontally out of the crossbeam, rotate the seat cushion and base to reverse, and then insert the base into the crossbeam to form a lock.

[0078] In the above-mentioned baby carriage, the reversing mechanism is achieved by dividing the base into an upper base and a lower base from top to bottom. The upper base is rotatably set on the lower base, the lower base is slidably set on the frame, the seat cushion is set on the upper base, and the upper base is rotated 180° to perform reversing. Beneficial effects

[0079] Compared with the prior art, the baby stroller with a retractable rear push bar has the following advantages:

[0080] 1. The rear push rod is removable, allowing the stroller to be converted between a stroller and a bike, increasing its versatility and extending its lifespan. The cleverly designed disassembly mechanism allows the push rod to be removed by simply pressing the first unlocking button, making installation and removal simple and easy. The push rod can be stored after removal for user convenience. The push rod also features steering control, allowing for removal without damaging the existing steering mechanism. The push rod is removable and offers comprehensive functionality.

[0081] 2. The vehicle can be converted between a tricycle and a scooter. When the two rear forks are closed together, the opening and closing angle is minimized, and the pedals can be removed to use it as a balance bike. When the two rear forks are opened, it can be used as a tricycle. This not only reduces purchase costs and saves a lot of storage space, but also extends the product's life and avoids material waste. The two rear forks are locked front and back by two sets of locking devices: a front locking device and a rear locking device. This increases the number of locking points, improves stability, and prevents shaking at the rear wheel end.

[0082] 3. The seat can be adjusted up and down in height and left and right in position, and can be adaptively adjusted for children of different heights; it has a seat cushion reversing function. When pushing the stroller with the rear push rod, the seat can be reversed to allow the child to face the parents at the rear, making it easier for parents to take care of the child; the seat height, front and back, and direction adjustments are simple and convenient, and can be achieved by pressing a button, which is simple and convenient to operate.

[0083] 4. The rear wheel frame can be moved horizontally along the main crossbeam to adjust the distance between the front and rear wheels. At the same time, the seat can also be moved horizontally along the main beam to adapt to children of different heights. When the stroller is not in use, pushing the rear wheel frame to move it closer to the front wheels can significantly reduce the length of the stroller and form a storage state. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] FIG1 is a schematic structural diagram of the present invention.

[0085] FIG2 is a schematic structural diagram of the present invention from another angle.

[0086] FIG3 is a schematic structural diagram of a detachable connection structure.

[0087] FIG4 is an exploded structural diagram of the detachable connection structure.

[0088] FIG5 is a schematic structural diagram of the rear push rod.

[0089] FIG6 is a schematic structural diagram of the upper end of the rod body and the handle.

[0090] FIG7 is a schematic structural diagram of FIG6 from another angle.

[0091] FIG8 is a schematic structural diagram of a locking pin and a locking and resetting structure.

[0092] FIG9 is a schematic structural diagram of FIG1 after removing the beam and rear wheel assembly.

[0093] Figure 10 is a schematic diagram of the matching structure of the steering seat and the pull rod.

[0094] Figure 11 is a schematic diagram of the matching structure of the steering seat, pull rod and vehicle.

[0095] FIG12 is a schematic structural diagram of the rear fork assembly and the rear wheel.

[0096] FIG13 is a schematic structural diagram of the rear fork assembly and the rear wheel from another angle.

[0097] FIG14 is a schematic diagram of the structure of the rear fork assembly and the rear wheel from a top view.

[0098] FIG15 is a schematic structural diagram of FIG12 after removing the front and rear unlocking devices.

[0099] FIG16 is a schematic structural diagram of a single rear fork rod.

[0100] FIG17 is a schematic structural diagram of a single rear fork rod in cooperation with the front and rear unlocking devices.

[0101] FIG18 is a schematic diagram of the pedal storage structure.

[0102] Figure 19 is a schematic diagram of the front structure of the rear wheel assembly.

[0103] FIG20 is a bottom view of the invention.

[0104] FIG21 is a schematic diagram of the installation of the seat and the rear wheel frame of the present invention.

[0105] FIG22 is a schematic diagram of the locking hole and the limiting hole at the bottom of the beam of the present invention.

[0106] Figure 23 is a partial cross-sectional view of the rear wheel frame and the beam of the present invention.

[0107] FIG. 24 is an enlarged cross-sectional view of a locking mechanism 1 of the present invention.

[0108] FIG25 is an enlarged cross-sectional view of the second locking mechanism of the present invention.

[0109] FIG. 26 is a schematic structural diagram of a locking mechanism 1 of the present invention.

[0110] FIG. 27 is a schematic structural diagram of the locking mechanism 2 of the present invention.

[0111] FIG. 28 is a schematic diagram of another embodiment of the locking mechanism of the present invention.

[0112] FIG. 29 is a cross-sectional view of another embodiment of the locking mechanism of the present invention.

[0113] FIG30 is a schematic diagram of another embodiment of the locking mechanism of the present invention.

[0114] FIG31 is a cross-sectional view of another embodiment of the locking mechanism of the present invention.

[0115] FIG32 is a schematic diagram of the overall structure of the baby carriage of the present invention.

[0116] FIG33 is a schematic structural diagram of the vehicle frame of the present invention.

[0117] FIG34 is a partial enlarged schematic diagram of the seat cushion of the present invention before being lifted.

[0118] FIG35 is a partial enlarged schematic diagram of the seat cushion of the present invention after being lifted.

[0119] FIG36 is a schematic structural diagram of the keyhole of the present invention.

[0120] FIG37 is a schematic diagram of the limiting mechanism of the present invention.

[0121] FIG38 is a simplified schematic diagram of the first reversing mechanism of the present invention.

[0122] FIG39 is a simplified schematic diagram of a second reversing mechanism of the present invention.

[0123] Figure 40 is a simplified schematic diagram of the third reversing mechanism of the present invention.

[0124] FIG41 is a simplified schematic diagram of the fourth reversing mechanism of the present invention.

[0125] FIG42 is a schematic diagram of another embodiment of the limiting mechanism of the present invention.

[0126] FIG43 is a cross-sectional view of another embodiment of the limiting mechanism of the present invention.

[0127] In the figure, 1, vehicle beam; 2, handlebar stem; 3, handlebar assembly; 4, front wheel assembly; 5, rear wheel assembly; 6, seat; 7, rear push rod; 8, steering hole; 9, rotating seat; 10, mounting hole; 11, first unlocking button; 12, latch; 13, elastic member; 14, unlocking slide; 15, mounting seat; 16, storage tube hole; 17, storage channel; 18, rod body; 19, grip; 20, locking pin; 21, hinge shaft; 22, connecting piece; 23, linear locking hole; 24, second return spring; 25, return block; 26, guide slope; 27, return slide; 28, buckle; 29, mounting port; 30, mounting slope; 31, first return spring; 32, clamping groove; 33, clamping ring; 34, driving slope; 35 , drive frame; 36, pull rod; 37, first rotating shaft; 38, top block; 40, connecting seat; 41, rotating matching groove; 42, connecting head; 43, socket; 44, outer avoidance groove; 45, inner tube; 46, outer tube; 47, first gear hole; 101, rear wheel frame; 201, front fork; 301, rear fork assembly; 401, rear wheel; 701, front wheel; 801, pedal; 901, rear fork rod; 1001, adapter; 1101, second rotating shaft; 1201, closing bayonet; 1301, unfolding bayonet; 1401, front clamping block; 1501, front return spring; 1601, front unlocking button; 1701, front avoidance gap; 1801, rear clamping block; 1901, locking insert; 2001, closing gap; 21 01, expansion gap; 2201, rear unlock button; 2301, rear return spring; 2401, rear avoidance gap; 2501, pedal plug hole; 2601, abutment; 2701, pedal; 2801, teeth; 702, button one; 802, lock hole; 902, lock block; 1002, limit block; 1102, return spring one; 1202, button two; 1302, push block; 1402, latch; 1502, clamping hole; 1602, return spring two; 1702, ball bearing; 1802, limit hole; 1902, return spring three; 2002, upper clamping slot; 2102, lower clamping slot; 2202, upper clamping block; 2302, lower clamping block; 3002, button three; 3102, positioning hole; 3202 , positioning column; 3302, elastic member 1; 3402, positioning block; 3502, oblique guide groove; 3602, guide column; 3702, boss; 4002, button 4; 4102, mounting hole 2; 4202, mounting column; 4302, elastic member 2; 4402, mounting block; 4502, oblique slot; 4602, guide block; 4702, boss; 701, front wheel; 401, rear wheel; 303, seat cushion; 403, base; 503, locking block 2; 603, button 5; 703, locking hole 2; 803, push rod; 1103, button 6; 1203, second push block; 1303, return spring 4; 1403, adjusting rod; 1603, limit block 2; 1703, second locking hole; 1803, adjusting channel;1903, backrest; 2103, crossbeam; 2203, sliding sleeve; 3003, button five; 3103, positioning hole two; 3203, positioning column two; 3303, elastic member three; 3403, positioning block two; 3503, inclined guide groove two; 3603, guide column two; 3703, protruding column two. Best Mode for Carrying Out the Invention

[0128] As shown in Figures 1 and 2, the baby carriage includes a beam 1, a handlebar stem 2, a handle assembly 3, a front wheel assembly 4, a rear wheel assembly 5 and a seat 6. The handlebar stem 2 is arranged at the front end of the beam 1, the upper end of which is connected to the handle assembly 3, and the lower end is connected to the front wheel assembly 4. The seat 6 and the rear wheel assembly 5 are arranged on the beam 1. A rear push rod 7 is also provided at the rear end of the beam 1, and the lower end of the rear push rod 7 is detachably connected to the beam 1 through a detachable connecting structure.

[0129] The rear end of the vehicle beam 1 is provided with a steering hole 8, within which a rotating seat 9 is provided. The rotating seat 9 is cylindrical and is embedded in the steering hole 8, and the shapes and sizes of the two are matched. The rotating seat 9 is axially provided with a polygonal mounting hole 10. The shape of the lower end of the rear push rod 7 matches the shape of the mounting hole 10, and the lower end of the rear push rod 7 is inserted into the polygonal mounting hole 10. In addition to the polygon, the mounting hole 10 can also be of other shapes, as long as the rear push rod 7 and the rotating seat 9 are kept in linkage. When the rotating seat 9 cannot rotate relative to the vehicle beam 1, the rear push rod 7 does not have a steering control function. The rear push rod 7 can be removed from the mounting hole 10 by unlocking the detachable connection structure between the rear push rod 7 and the rotating seat 9.

[0130] As shown in Figures 3 and 4, in this embodiment, the detachable connection structure includes a first unlocking button 11, a latch 12, and an elastic member 13. The elastic member 13 and the latch 12 are disposed in the rear push rod 7. The latch 12 can simultaneously penetrate the side walls of the rear push rod 7 and the rotating base 9 under the elastic force of the elastic member 13, thereby coupling the rear push rod 7 and the rotating base 9. The first unlocking button 11 can push the outer end of the latch 12 away from the rotating base 9, thereby separating the rear push rod 7 and the rotating base 9. The elastic member 13 is a V-shaped spring, one end of which abuts against the inner wall of the rear push rod 7 and the other end abuts against the inner end of the latch 12.

[0131] An unlocking slot 14 is provided on the beam 1, and the above-mentioned first unlocking button 11 is arranged in the unlocking slot 14. The outer end of the first unlocking button 11 is exposed, and the inner end can abut against the outer end of the above-mentioned latch 12. A first return spring 31 that can control the return of the first unlocking button 11 is also provided between the first unlocking button 11 and the unlocking slot 14.

[0132] After the lower end of the rear push rod 7 is inserted into the mounting hole 10 and is in place, the pin holes on the side walls of the rear push rod 7 and the rotating seat 9 are aligned, and the outer ends of the latch 12 pass through the two pin holes in sequence under the action of the elastic member 13, stringing the rear push rod 7 and the rotating seat 9 together. At this time, the rear push rod 7 is locked with the rotating seat 9 in the axial direction of the mounting hole 10 and cannot be withdrawn, and the baby carriage can be used as a stroller. When it is necessary to remove the rear push rod 7, the first unlocking button 11 is pressed. The first unlocking button 11 moves inward along the unlocking slide 14, and the inner end supports the outer end of the latch 12. When the first unlocking button 11 is pressed into place, the outer end of the latch 12 is just pushed back to the intersection of the outer wall of the rear push rod 7 and the inner wall of the mounting hole 10, so that the rear push rod 7 and the rotating seat 9 are separated, and the rear push rod 7 can be directly withdrawn along the mounting hole 10.

[0133] After being pulled out, the rear push rod 7 is stored in a storage structure. In this embodiment, the storage structure is a storage tube hole 16 opened along the length of the vehicle beam 1. The storage tube hole 16 serves as a storage space, and its shape and size match the rear push rod 7 to be stored. The rotating seat 9 is provided with a storage channel 17, and the two ends of the storage channel 17 are connected to the storage tube hole 16. The removed rear push rod 7 is inserted into the storage channel 17 and the storage tube hole 16. The storage channel 17 is cross-connected with the mounting hole 10. The storage structure of the rear push rod 7 can also be a clamping member provided on the outside of the vehicle beam 1. The clamping member is a U-shaped clamp with an opening facing outward. The removed rear push rod 7 can be fixed by squeezing it into the clamp.

[0134] As shown in Figures 5-8, the rear push rod 7 includes a rod body 18 and a handle 19 disposed at the top of the rod body 18. The handle 19 and the rod body 18 are shown forming a certain angle, with the handle 19 extending horizontally rearward. After the rear push rod 7 is disassembled, the rod body 18 can be directly inserted into the aforementioned storage tube hole 16, while the handle 19 can remain external. In this case, no further adjustment of the angle between the handle 19 and the rod body 18 is required. To further improve the storage effect, the handle 19 and the rod body 18 can be adjusted to be aligned, with the majority of the handle 19 also inserted into the storage tube hole 16. In this case, the handle 19 needs to be rotatably connected to the rod body 18, and an angle-maintaining mechanism needs to be provided between the two to maintain the corresponding angle between the handle 19 and the rod body 18.

[0135] The angle-maintaining mechanism includes a locking pin 20 and a locking and resetting structure that causes the locking pin 20 to extend outward. The locking pin 20 and the locking and resetting structure are disposed within the mounting cavity of the rod body 18. The end of the handle 19 hinged to the rod body 18 is provided with at least two locking holes around a hinge axis 21. These locking holes are divided into a linear locking hole 23 and at least one angular locking hole. When the handle 19 rotates about the hinge axis 21, the locking holes can sequentially align with the locking pin 20. At this point, the outer end of the locking pin 20 can extend from the mounting cavity and be inserted into the corresponding locking hole, thereby locking the handle 19 and the rod body 18 together. The locking and resetting structure includes a second reset spring 24, the two ends of which act on the inner wall of the mounting cavity and the locking pin 20, respectively. The lock-reset mechanism also includes a mounting base 15 and a reset block 25. The locking pin 20 is fixed to the reset block 25 and extends toward the hinge axis 21. The mounting base 15 is provided with a guide slope 26. The reset block 25 can move relative to the mounting base 15 along the guide slope 26 to extend the locking pin 20 toward or away from the hinge axis 21. The second reset spring 24 acts on the reset block 25 to ensure that the reset block 25 always abuts against the guide slope 26. The mounting base 15 also has a reset slot 27 to provide space for the locking pin 20 to move with the reset block 25.

[0136] The mounting base 15 is provided with a buckle 28. The side wall of the rod body 18 defines a mounting opening 29 that communicates with the mounting cavity. The buckle 28 is provided with a mounting slope 30 that facilitates pressing the mounting base 15 into the mounting opening 29 along the mounting direction. A corresponding stopper is provided within the mounting cavity to engage with the buckle 28. Two connecting pieces 22 are spaced apart at the upper end of the rod body 18. The handle 19 is disposed between the two connecting pieces 22 and is hingedly connected to the connecting pieces 22 on either side via a hinge shaft 21.

[0137] The rod body 18 includes an inner tube 45 and an outer tube 46. One end of the inner tube 45 is connected to the above-mentioned handle 19, and the other end is inserted into the tube hole of the outer tube 46. The tube wall of the outer tube 46 is provided with multiple first gear holes 47 along the length direction. An elastic gear pin is provided on the inner tube 45. When the elastic gear pin is inserted into different first gear holes 47, the length of the inner tube 45 extending out of the outer tube 46 is adjusted. When stored, the inner tube is stored in the outer tube 46 to the maximum extent to shorten the storage length.

[0138] After the rear push rod 7 is inserted into the storage tube hole 16, it is necessary to keep the rear push rod 7 in the storage state and not fall out easily. An end cover can be set at the end of the storage channel 17 to seal the outlet of the storage channel 17 to prevent the rear push rod 7 from falling out, or a storage device can be added to lock it.

[0139] As shown in Figures 3 and 4, the receiving device can be an annular groove 32 provided at one end of the rear push rod 7 and a collar 33 provided in the receiving tube hole 16. The collar 33 is C-shaped, with its opening facing the groove 32 and capable of cooperating with the groove 32. A first return spring 31 is also provided between the collar 33 and the receiving tube hole 16. After the rear push rod 7 is inserted into the receiving tube hole 16 and is in place, the collar 33 is engaged with the corresponding groove 32 under the action of the first return spring 31, so that the rear push rod 7 is locked in the axial direction of the receiving tube hole 16. To facilitate removal, a force-storage elastic member can be provided in the receiving tube hole 16. The force-storage elastic member can be a spring. During the insertion of the rear push rod 7, the force-storage elastic member is compressed. After the collar 33 is engaged with the groove 32, the force-storage elastic member remains in a compressed state. When the collar 33 is unlocked from the groove 32, the rear push rod 7 is partially ejected under the action of the force-storage elastic member, facilitating removal. The retaining ring 33 and the retaining slot 32 can be unlocked using the aforementioned first unlocking button 11. A drive frame 35 is fixed to the retaining ring 33. The aforementioned first unlocking button 11 passes through the drive frame 35 and abuts against the outer end of the latch 12. The first unlocking button 11 is provided with a driving inclined surface 34 that abuts against the inner ring of the drive frame 35. When the first unlocking button 11 is pressed, the driving inclined surface 34 pushes the drive frame 35 and the retaining ring 33 away from the retaining slot 32, thereby unlocking the retaining ring. A first return spring 31 is also provided between the drive frame 35 and the vehicle frame to drive the drive frame 35 and the retaining ring 33 toward the retaining slot 32. The first unlocking button 11 can be used to simultaneously unlock the rear push rod 7 for both storage and separation, achieving multiple functions with one button.

[0140] When the rotating seat 9 can rotate relative to the vehicle beam 1, the rear push rod 7 can now have a steering control function. Since the shape of the rotating seat 9 is the same as that of the steering hole 8, the rotating seat 9 can rotate relative to the steering hole 8. A steering mechanism is also provided between the rear push rod 7 and the handlebar upright 2. The steering mechanism includes two pull rods 36. The two pull rods 36 are respectively arranged on both sides of the vehicle beam 1. The handlebar upright 2 is rotatably connected to the vehicle beam 1 through a first rotating shaft 37. The rotating seat 9 is located on both sides of its own rotation center and is provided with top blocks 38 corresponding to the above-mentioned pull rods 36. The two above-mentioned pull rods 36 are made of hard material and one end abuts against the corresponding top block 38, and the other end passes through the vehicle beam 1 and abuts against the abutment surface of the handlebar upright 2. The two abutment surfaces corresponding to the two uprights are respectively located on both sides of the first rotating shaft 37.

[0141] The rotating base 9 is cylindrical and inserted obliquely into the steering hole 8. The size and shape of the steering hole 8 match the rotating base 9. A top block 38 is provided on either side of the rotating base 9 at its rotation center. Two pull rods 36 are provided on either side of the stroller beam 1. One end abuts against the rear abutment surface of the top block 38 on the corresponding side, while the other end passes through the beam 1 and abuts against the front abutment surface of the handlebar stem 2. Two guide channels 39 can be provided within the beam 1 for the two pull rods 36 to pass through. Each end of the pull rod 36 has a curved ball head. The front and rear abutment surfaces are both inclined and parallel to each other, with the same inclination as the aforementioned rear push rod 7.

[0142] A connector 40 is fixedly mounted on the handlebar stem 2, facing the side of the beam 1. The front end of the beam 1 has an arc-shaped rotational engagement groove 41. The end of the connector 40, which connects to the beam 1, is shaped to match the aforementioned rotational engagement groove 41 and is arc-shaped. A connector 42, protruding from the arc-shaped surface of the rotational engagement groove 41, is provided at the front end of the beam 1. The connector 40 defines a socket 43 corresponding to the connector 42. The connector 42 is inserted into the socket 43 and rotatably connected to the connector 40 via the first rotation axis 37. The end surface of the connector 40 and the rotational engagement groove 41 are in contact with each other, and a small gap is maintained between the contact surfaces during rotation of the handlebar stem 2. The two front abutment surfaces corresponding to the two pull rods 36 are located on the inner wall of the socket 43 and on either side of the first rotation axis 37.

[0143] The inner wall of the steering hole 8 is provided with an inner clearance groove for the pull rod 36 and / or the top block 38 to move around, and the outer side of the rotating seat 9 is provided with an outer clearance groove 44 for the pull rod 36 to move around. The rotating seat 9 is provided with a polygonal mounting hole 10. The lower end of the rear push rod 7 is shaped to match the mounting hole 10 and is inserted into the polygonal mounting hole 10. The mounting hole 10 can also be elliptical or other special shapes besides circular.

[0144] During use, the rear wheel assembly 5 of the child stroller can be bifurcated to function as a tricycle. Because the pull rods 36 are made of a hard material (e.g., a metal rod), their front and rear ends respectively abut against the top block 38 and the front abutment surfaces of the connecting seat 40, forming a structure approximately parallelogram-shaped. The parent can normally propel the child stroller forward using the rear push rod 7. To control steering, the parent rotates the rear push rod 7, which in turn drives the rotating seat 9 in place. As the rotating seat 9 rotates, the top block 38 on one side moves toward the front of the vehicle, pushing the corresponding pull rod 36 forward. The front end of the pull rod 36 pushes against the corresponding front abutment surface, ultimately driving the handlebar stem 2 to turn. The handlebar stem 2 rotates in the same direction as the rear push rod 7. At this point, the top block 38 and pull rod 36 on the other side correspondingly retreat, providing clearance for the front abutment surface on the other side to move.

[0145] When the rear push rod 7 is not needed, it can be removed and stored through the above-mentioned storage structure, which is more convenient to use.

[0146] In order to ensure the aesthetic appearance of the product, a plugging piece can be added to seal the outer end of the mounting hole 10 or the storage tube hole 16. The plugging piece can be two, respectively blocking the outer end of the mounting hole 10 or the storage tube hole 16, or one, selectively blocking the outer end of the above-mentioned mounting hole 10 or the storage tube hole 16. The plugging piece includes a first cover plate and a second cover plate for blocking the mounting hole 10 and the storage tube hole 16 respectively. The two cover plates are connected to a rotating shaft and are in a "V" shape. The plugging piece is set in an inner cavity connected to the storage tube hole 16 and the mounting hole 10 by rotating the rotating shaft. When the above-mentioned rear push rod 7 is inserted from the mounting hole 10, it can push open the first cover plate and drive the second cover plate to cover the outer end of the storage tube hole 16. When the rear push rod 7 is inserted from the outer end of the storage tube hole 16, it can push open the second cover plate and drive the first cover plate to cover the mounting hole 10. Alternatively, the blocking member includes a blocking member and a connecting cord, one end of the connecting cord being connected to the vehicle body and the other end being connected to the blocking member, and the blocking member can cooperate with the outer end of the mounting hole 10 or the outer end of the tube receiving hole 16 to block the mounting hole 10 or the outer end of the tube receiving hole 16. The shapes and positions of the mounting hole 10 and the outer end of the tube receiving hole 16 correspond to each other, so that one of them can overlap with the other after rotating around the connection point of the connecting cord with the vehicle body.

[0147] As shown in Figure 1, the rear wheel assembly 5 includes a rear wheel frame 101, a rear fork assembly 301 and two rear wheels 401. The front wheel assembly 4 consists of a front fork 201 and a front wheel 701. The upper end of the front fork 201 is connected to the handlebar stem 2, and the lower end is connected to the front wheel 701. Pedals 801 are provided on both sides of the front wheel 701. The rear fork assembly 301 includes two rear fork rods 901. One end of each rear fork rod 901 is provided with an adapter 1001, which is rotatably connected to the rear wheel frame 101 through a second rotating shaft 1101, and the other end is connected to the rear wheel 401. The two rear fork rods 901 swing around the axis of their respective adapters 1001 to make the two rear wheels 401 approach or separate.

[0148] As shown in Figures 12-17, the multifunctional stroller further includes a front locking device and a rear locking device, both of which are used to lock and maintain the opening and closing angles of the two rear forks 901. The front locking device acts on the two adapters 1001, and the rear locking device is provided between the front locking device and the rear wheel 401 and acts on the main body of the rear fork 901. When the two rear forks 901 are closed and locked, the stroller can be used as a balance stroller. When the two rear forks 901 are opened and locked, the stroller can be used as a tricycle.

[0149] The outer sides of the two adapters 1001 are provided with locking snaps. The corresponding locking snaps on the two adapters 1001 are grouped in pairs. Each adapter 1001 has at least two locking snaps, which are divided into a closed snap 1201 and at least one unfolded snap 1301. In this embodiment, there is only one closed snap 1201 and one unfolded snap 1301 on a single adapter 1001, and they are arranged at intervals along the circumference of the adapter 1001, corresponding to the two states of the two rear forks 901 being completely closed or fully opened. Of course, if necessary, several groups of unfolded snaps 1301 can be provided to achieve opening states with multiple opening degrees.

[0150] The front locking device includes a front card block 1401 and a front unlocking device. The front card block 1401 can be simultaneously locked into the two locking slots of the same group to limit the rotation of the adapter 1001. The front unlocking device includes a front unlocking button 1601 and a front return spring 1501. The rear wheel frame 101 is provided with a front guide groove for the reciprocating movement of the front card block 1401 and the front unlocking button 1601. One end of the front unlocking button 1601 is exposed from the bottom of the rear wheel frame 101, and the other end extends into the front guide groove and can push the front card block 1401 to move. The front card block 1401 is set in the front guide groove, and the front return spring 1501 controls the front card block 1401 to reset after the external force is removed. A front avoidance notch 1701 is provided on the side of one end of the front block 1401 facing the front unlocking button 1601. When the front avoidance notch 1701 and the locking bayonet are in the same plane, the distance between the side wall of the avoidance notch and the central axis of the adapter 1001 is greater than the radius of the adapter 1001.

[0151] As shown in Figures 14 and 17, the front clamping block 1401 is now locked in the two closed bayonet holes 1201, and the two rear fork rods 901 are in a completely closed state, and the rear fork rods 901 cannot swing. When the front unlocking button 1601 is pressed from bottom to top, the front unlocking button 1601 drives the front clamping block 1401 to move upward, so that the original locked position is higher than the height of the locking bayonet hole and stays in the unlocked position. The entire adapter 1001 is in the front avoidance notch 1701. Due to the existence of the front avoidance notch 1701, the rotation of the adapter 1001 is not affected. At this time, the front locking device is unlocked, and the two rear fork rods 901 can swing freely to adjust the opening and closing degree. When the deployment bayonet 1301 on the adapter 1001 is rotated to the deployment bayonet 1301, the front unlocking button 1601 is released to allow the front clamping block 1401 to reset under the action of the front reset spring 1501. The front clamping block 1401 is simultaneously locked into the two deployment bayonet 1301 and returns to the locked position. The two rear fork rods 901 are locked again, but at this time the vehicle can be used as a tricycle.

[0152] As shown in Figures 14 and 17 , the rear locking device includes a rear clamping block 1801 and a rear unlocking device. As shown in Figure 16 , each rear fork 901 is provided with an arcuate locking insert 1901 on its inner side. The rear fork 901 on the left side of the vehicle is shown in the figure. The inner side of this rear fork 901 is provided with an upper locking insert 1901, while the inner side of the other rear fork 901 is provided with an arcuate lower locking insert 1901. The upper locking insert 1901 and the lower locking insert 1901 are stacked one above the other. Each of the upper and lower locking inserts 1901 and 1901 has at least two locking notches, including a closed notch 2001 and at least one expanded notch 2101. When the two locking inserts 1901 swing with their respective rear fork 901, the upper and lower locking notches of the two locking inserts 1901 can be aligned vertically in a locked position, or the corresponding expanded notches 2101 can be aligned vertically in an expanded position. The rear clamping block 1801 can be simultaneously engaged with the upper and lower corresponding locking notches to limit the swinging of the two rear fork rods 901. The rear unlocking device controls the movement of the rear clamping block 1801 to switch the rear clamping block 1801 between the locked position and the unlocked position.

[0153] The rear unlocking device includes a rear unlocking button 2201 and a rear return spring 2301. A rear guide slot is defined on the rear wheel frame 101 for the reciprocating motion of the rear clamping block 1801 and the rear unlocking button 2201. One end of the rear unlocking button 2201 is exposed, while the other end extends into the rear guide slot, pushing the rear clamping block 1801. The rear clamping block 1801 is positioned within the rear guide slot, and the rear return spring 2301 controls the rear clamping block 1801 to return to its original position after the external pressure is removed. A rear clearance notch 2401 is defined on the side of the rear clamping block 1801 facing the rear unlocking button 2201.

[0154] As shown in Figures 14 and 17, the rear clamping block 1801 is now in the state of being stuck in the two closed notches 2001, and the two rear fork rods 901 are in a completely closed state, and the rear fork rods 901 cannot swing. When the rear unlocking button 2201 is pressed from bottom to top, the rear unlocking button 2201 drives the rear clamping block 1801 to move upward, so that the original stuck position is higher than the height of the locking notch and stays in the unlocked position. The upper and lower locking inserts 1901 are in the rear avoidance notch 2401. Due to the presence of the rear avoidance notch 2401, the upper and lower locking inserts 1901 and the subsequent swing of the fork rod 901 are not affected. At this time, the rear locking device is unlocked, and the two rear fork rods 901 can swing freely to adjust the opening and closing degree. When the expansion notches 2101 on the upper and lower locking inserts 1901 are rotated to the locked position, the rear unlocking button 2201 is released, and the rear clamping block 1801 is reset under the action of the rear reset spring 2301. The rear clamping block 1801 is simultaneously locked into the two expansion notches 2101 and returns to the locked position. The two rear fork rods 901 are locked again, but at this time the vehicle can be used as a tricycle.

[0155] In the present application, the front locking device and the rear locking device lock the two rear fork rods 901 together from the front and rear positions respectively. Therefore, unlocking any one locking device alone cannot achieve complete unlocking. The front locking device and the rear locking device must be unlocked at the same time. In order to simplify the operation, the front clamping block 1401 and the rear clamping block 1801 can be integrated into a whole, the front guide groove and the rear guide groove are connected to form a whole, and the front unlocking button 1601 and the rear unlocking button 2201 are integrated into a whole as shown in Figure 17. In this way, the front clamping block 1401 and the rear clamping block 1801 can be moved simultaneously by a single pressing action, thereby unlocking the front locking device and the rear locking device at the same time, which is easy to operate.

[0156] In addition, in order to ensure the consistency of the swing amplitude of the two rear forks 901, a section of teeth 2801 is provided on the outer side of the adapter 1001. The teeth 2801 of the two adapters 1001 engage with each other. Through the engagement of the teeth 2801, the swing of the two rear forks 901 remains consistent.

[0157] To convert the baby carriage from a tricycle to a balance bike, in addition to bringing the two rear forks 901 together and turning the two rear wheels 401 180 degrees inward, the two pedals 801 need to be removed. The removed pedals 801 can be directly inserted into the two pedal insertion holes 2501 of the rear wheel frame 101 (as shown in Figure 18). The storage area is located at the rear lower part of the rear wheel frame 101, between the two rear forks 901. Because the pedals 2701 on the pedals 801 can easily rotate relative to the pedal shaft, a supporting member 2601 is fixed to the rear wheel frame 101 between the two pedal insertion holes 2501. After the pedal shaft is inserted into the pedal insertion hole 2501, the two pedals 2701 can just rest against the supporting member 2601. In this way, the swing of the pedals 2701 is blocked by the supporting member 2601, preventing shaking during riding.

[0158] As shown in Figures 21 to 24, the rear wheel frame 101 can move forward and backward along the beam 1. A locking mechanism is provided between the rear wheel frame 101 and the beam 1 for locking the relative position of the rear wheel frame 101 and the beam 1. As shown in Figure 26, the locking mechanism includes a button 702 provided on the rear wheel frame 101 and a locking hole 802 provided on the beam 1. Several locking holes 802 are arranged at intervals along the length direction of the beam 1. A slide groove is provided on the rear wheel frame 101. The button 702 is slidably provided in the slide groove along the length direction of the beam 1. The outer end of the button 702 extends out of the slide groove. The slide groove A locking block 902 is also provided inside, and the inner end of button 1 702 abuts against the locking block 902. The abutting surface between button 1 702 and the locking block 902 is an inclined surface. A limit block 1002 is fixed on the locking block 902, and the limit block 1002 extends toward the vehicle beam 1. When button 1 702 is pressed, button 1 702 pushes the locking block 902 up and down through the inclined abutting surface, so that the limit block 1002 exits the lock hole 802 to form unlocking. A reset spring 1102 is also provided in the slide groove 1 for pushing the locking block 902 to reset, so that the limit block 1002 is inserted into the lock hole 802 to form locking.

[0159] As shown in Figures 25 and 27, the seat 6 can move forward and backward relative to the vehicle beam 1. A locking mechanism 2 is provided between the seat 6 and the vehicle beam 1 for locking the relative position of the seat 6 and the vehicle beam 1. The locking mechanism 2 includes a button 2 1202 provided on the seat 6 and a latch hole 1502 provided on the vehicle beam 1. The latch holes 1502 are arranged at intervals along the length direction of the vehicle beam 1. The seat 6 is provided with a slide groove 2. The button 2 1202 is provided in the slide groove 2 and slides along the length direction of the slider. The outer end of the button 2 1202 extends out of the slide groove 2. A push block 1302 is also provided in the slide groove 2. The inner end of the button 2 1202 abuts against the push block 1302. The abutment surface between button 2 1202 and push block 1302 is an inclined surface, and a latch 1402 is fixed on the push block 1302. When button 2 1202 is pressed, button 2 1202 pushes the push block 1302 up and down through the inclined abutment surface, so that the latch 1402 exits the outside of the card hole 1502 to form unlocking. A reset spring 2 1602 is also provided in the second slide groove to push the push block 1302 to reset, so that the latch 1402 is inserted into the card hole 1502 to form locking.

[0160] As shown in Figures 22 and 23, the beam 1 is also provided with a storage lock position, and the rear wheel frame 101 is provided with a stopper. When the locking mechanism is unlocked, the rear wheel frame 101 is pushed toward the front wheel 701 until the stopper enters the storage lock position, forming a storage state. The beam 1 is also provided with a circular stopper hole 1802, which serves as the aforementioned storage lock position. The stopper hole 1802 is located between the two lock holes 802. The limiting member includes a ball 1702, and a second mounting hole 4102 is provided on the rear wheel frame 101. The extension direction of the second mounting hole 4102 is perpendicular to the moving direction of the rear wheel frame 101. The upper end of the second mounting hole 4102 passes through the rear wheel frame 101. The ball 1702 is arranged in the second mounting hole 4102 and can be raised and lowered along the second mounting hole 4102. A third return spring 1902 is also provided in the second mounting hole 4102 to push the ball 1702 to press against the vehicle beam 1; when the locking mechanism is unlocked, the rear wheel frame 101 is pushed to move toward the front wheel 701 until the position of the ball 1702 corresponds to the position of the limiting hole 1802, and the third return spring 1902 pushes the ball 1702 to be stuck in the limiting hole 1802 to form a lock.

[0161] As shown in Figures 21 and 22, a plurality of upper card slots 2002 are provided on the top surface of the vehicle beam 1, and a plurality of lower card slots 2102 are provided on the bottom surface of the vehicle beam 1. The upper card slots 2002 and the lower card slots 2102 extend respectively along the length direction of the vehicle beam 1. A plurality of upper card blocks 2202 corresponding to each upper card slot 2002 are fixedly provided on the bottom of the seat 6. The upper card blocks 2202 are embedded in the corresponding upper card slots 2002 and translate along the upper card slots 2002; a plurality of lower card blocks 2302 corresponding to each lower card slot 2102 are fixedly provided on the top of the rear wheel frame 101. The lower card blocks 2302 are embedded in the corresponding lower card slots 2102 and translate along the lower card slots 2102.

[0162] The beam 1 is also provided with an anti-unhooking device to prevent the rear wheel frame 101 and the seat 6 from being disengaged from the beam 1. As shown in FIG21, the anti-unhooking device includes a support member fixedly arranged at the rear end of the beam 1.

[0163] The regulation method of the present invention is as follows:

[0164] Adjustment of the front and rear position of the rear wheel 401: By pressing button 1 702, the limit block 1002 is withdrawn from the lock hole 802 to form an unlocking, pushing the rear wheel frame 101 to translate. When the limit block 1002 moves to a position corresponding to another lock hole 802, release button 1 702, and the return spring 1102 is used to push the lock block 902 to reset. The limit block 1002 is inserted into the lock hole 802 to form a lock, thereby completing the front and rear position adjustment of the rear wheel 401.

[0165] Adjustment of the front and rear position of seat 6: By pressing button 2 1202, the latch 1402 is withdrawn from the card hole 1502 to form an unlocking, pushing the seat 6 to move horizontally. When the latch 1402 moves to the position corresponding to the other card hole 1502, release button 2 1202, and the return spring 2 1602 is used to push the push block 1302 to reset, and the latch 1402 is inserted into the card hole 1502 to form a lock, thereby completing the front and rear position adjustment of seat 6.

[0166] Rear wheel frame 101 is stored: by pressing button 1 702, the limit block 1002 is withdrawn from the lock hole 802 to form unlocking, pushing the rear wheel frame 101 to move horizontally in the direction close to the front wheel 701, pushing the rear wheel frame 101 to move in the direction close to the front wheel 701 until the position of the ball 1702 corresponds to the position of the limit hole 1802, and the return spring three 1902 pushes the ball 1702 to be stuck in the limit hole 1802 to form locking, thereby completing the storage of the vehicle body; when in use, the rear wheel frame 101 is pulled in the direction away from the front wheel 701, so that the ball 1702 compresses the return spring three 1902 and withdraws from the limit hole 1802.

[0167] As shown in Figures 28 and 29, another embodiment of the locking mechanism 1, the locking mechanism 1 includes a button 3002 movably set on the rear wheel frame 101, a positioning hole 3102 opened on the rear wheel frame 101, and a positioning column 3202 movably set on the beam 1. Several positioning holes 3102 are arranged at intervals along the length direction of the beam 1. When the rear wheel frame 101 moves back and forth along the beam 1, the positioning columns 3202 can correspond to each positioning hole 3102 one by one. An elastic member 3302 is further provided in the beam 1 for driving the positioning columns 3202 to insert into the positioning holes 3102 to form a lock; the button 3002 is slidably set on the rear wheel frame 101 along the length direction of the beam 1, and a sliding cavity is opened on the button 3002. A positioning block 3402 is movably provided in the sliding cavity, and a plurality of oblique guide grooves 3502 are opened on the button three 3002. A plurality of guide posts 3602 corresponding to the oblique guide grooves 3502 are fixed on the positioning block 3402. The guide posts 3602 are inserted into the oblique guide grooves 3502, and the positioning block 3402 is raised and lowered relative to the button three 3002 along the oblique guide grooves 3502 through the guide posts 3602; a plurality of protrusions 3702 corresponding to the positions of the positioning holes 3102 are fixed at the bottom of the positioning block 3402. When the button three 3002 is pressed, the button three 3002 pushes the positioning block 3402 down, so that the protrusions 3702 extend into the positioning holes 3102 and the positioning posts 3202 are withdrawn from the positioning holes 3102 to form unlocking.

[0168] As shown in Figures 30 and 31, another embodiment of the locking mechanism 2, the locking mechanism 2 includes a button 4002 movably set on the seat 6, a mounting hole 2 4102 opened on the seat 6, and a mounting column 4202 movably set on the vehicle beam 1. Several mounting holes 2 4102 are arranged at intervals along the length direction of the vehicle beam 1. When the seat 6 moves forward and backward along the vehicle beam 1, the mounting columns 4202 can correspond to each mounting hole 2 4102 one by one. An elastic member 2 4302 is further provided in the vehicle beam 1 for driving the mounting column 4202 to insert into the mounting hole 2 4102 to form a lock; the button 4002 is slidably set on the seat 6 along the length direction of the vehicle beam 1, and a sliding cavity is opened on the button 4002. A mounting block 4402 is provided, and a plurality of oblique slots 4502 are formed on the button four 4002. A plurality of guide blocks 4602 corresponding to the oblique slots 4502 are fixed on the mounting block 4402. The guide blocks 4602 are inserted into the oblique slots 4502, and the mounting block 4402 is raised and lowered relative to the button four 4002 along the oblique slots 4502 through the guide blocks 4602; a plurality of protrusions 4702 corresponding to the positions of the mounting holes 4102 are fixed at the bottom of the mounting block 4402. When the button four 4002 is pressed, the button four 4002 pushes the mounting block 4402 to descend, so that the protrusions 4702 extend into the mounting holes 4102 and the mounting columns 4202 are withdrawn from the mounting holes 4102 to form an unlocking.

[0169] As shown in Figures 32 and 33, a multi-directionally adjustable baby carriage includes a beam 1, a seat 6, a front wheel 701 arranged at the front end of the beam 1, and a rear wheel 401 arranged at the rear end of the beam 1. A rear push rod 7 is provided at the rear end of the beam 1. The seat 6 includes a base 403 and a seat cushion 303. The base 403 is provided on the beam 1, and the seat cushion 303 is provided on the base 403. An adjusting rod 1403 is provided between the seat cushion 303 and the base 403. An adjusting channel 1803 is provided at the bottom of the seat cushion 303 or the upper end surface of the base 403. One end of the adjusting rod 1403 is inserted into the adjusting channel 1803 and rises and falls along the adjusting channel 1803, and the other end is fixedly connected to the base 403 or the seat cushion 303. An upper and lower locking mechanism is provided between the adjusting rod 1403 and the adjusting channel 1803 for locking the relative position of the adjusting rod 1403 and the adjusting channel 1803.

[0170] As shown in Figures 34 and 35, the upper and lower locking mechanisms include a button 5 603 movably disposed on the base 403, a second lock hole 703 provided on the adjustment channel 1803, and a second lock block 503 provided on the adjustment rod 1403. Several second lock holes 703 are arranged at intervals along the movement direction of the seat cushion 303. When the seat cushion 303 is raised or lowered relative to the base 403, the second lock blocks 503 can correspond one-to-one with each second lock hole 703. A plurality of push rods 803 are fixedly disposed on the button 5 603, corresponding one-to-one to the positions of the second lock holes 703. The locking block 2 503 is set on the adjustment rod 1403 for horizontal sliding. A return spring 1 is also provided in the seat cushion 303 for pushing the locking block 2 503 to move horizontally so that the locking block 2 503 is inserted into the locking hole 2 703 to form a lock. The button 5 603 is set on the base 403 for horizontal sliding, and the sliding direction of the button 5 603 is consistent with the sliding direction of the locking block 2 503. Press the button 5 603 to insert each push rod 803 into the locking hole 2 703 and push the locking block 2 503 out of the locking hole 2 703 to form an unlocking.

[0171] As shown in Figure 36, at least one second locking hole 703 is shaped like a waist, while the remaining second locking holes 703 are shaped like round holes. The shape of the second locking block 503 matches the shape of the round hole. When the second locking block 503 is located in the waist-shaped hole, the seat cushion 303 can move back and forth along the waist-shaped hole through the second locking block 503. In this embodiment, there are two second locking holes 703: the upper second locking hole 703 is a waist-shaped hole, and the lower second locking hole 703 is a round hole. When the seat cushion 303 is raised, the second locking block 503 is located in the upper waist-shaped hole, providing a shock-absorbing effect.

[0172] The base 403 is slidably mounted on the vehicle beam 1. A limiting mechanism is provided between the base 403 and the vehicle beam 1 for locking the relative position of the base 403 and the vehicle beam 1. As shown in FIG37 , the limiting mechanism includes a sixth button 1103 and a second push block 1203. The vehicle beam 1 is provided with a plurality of second latching holes 1703, which are spaced apart along the length of the vehicle beam 1. The base 403 is provided with a slide groove, and the sixth button 1103 is slidably mounted in the slide groove along the length of the slider. The outer end of the sixth button 1103 extends out of the slide groove, and the inner end of the sixth button 1103 abuts against the second push block 1203. The sixth button 1103 and the second push block 1203 are pressed against each other. The abutment surface between the blocks 1203 is an inclined surface, and a limit block 2 1603 is fixed on the second push block 1203. Press button 6 1103, and button 6 1103 pushes the second push block 1203 up and down through the inclined abutment surface, so that the limit block 2 1603 exits the second clamping hole 1703 to form unlocking. A reset spring 4 1303 is also provided in the slide groove to push the second push block 1203 to reset, so that the limit block 2 1603 is inserted into the second clamping hole 1703 to form locking.

[0173] A backrest 1903 is provided on the seat cushion 303. A rear push rod 7 is provided at the rear end of the beam 1. Parents can control the stroller to move forward or backward through the rear push rod 7.

[0174] As shown in Figure 38, a reversing mechanism is provided between the seat cushion 303 and the base 403 for reversing the seat cushion 303 and reorienting it to a mirror image of its original orientation. The reversing mechanism includes two locking blocks 503 disposed on the adjustment rod 1403. The two locking blocks 503 are symmetrically positioned relative to the center of the adjustment rod 1403, with the plane of the seat cushion 303 perpendicular to the axis of the adjustment rod 1403. Pressing button 5 603 pushes one of the locking blocks 503 out of the locking hole 703, thereby unlocking the seat cushion 303. The adjustment rod 1403 is then pulled out of the adjustment channel 1803. After reversing the seat cushion 303, the adjustment rod 1403 is then inserted into the adjustment channel 1803, causing the other locking block 503 to be inserted into the locking hole 703, locking the seat cushion 303.

[0175] The baby carriage of the present invention further comprises guardrails and a safety belt.

[0176] The adjustment method of the seat of the present invention is as follows:

[0177] Height adjustment of the seat cushion 303: Press button 5 603 to extend each push rod 803 into the corresponding second lock hole 703 and push the second lock block 503 out of the second lock hole 703 to unlock it. Lift or press the seat cushion 303 so that the second lock block 503 corresponds to the position of another second lock hole 703. Release the button, and the return spring pushes the second lock block 503 to move horizontally, so that the second lock block 503 is inserted into the second lock hole 703 to lock it, thereby completing the height adjustment of the seat cushion 303.

[0178] Adjustment of the front and rear position of the seat cushion 303: By pressing button six 1103, the limit block two 1603 is withdrawn from the second card hole 1703 to form an unlocking, pushing the seat cushion 303, and the seat cushion 303 and the base 403 are translated as a whole. When the limit block two 1603 moves to the position corresponding to the other second card hole 1703, release button six 1103, and the reset spring four 1303 is used to push the second push block 1203 to reset, and the limit block two 1603 is inserted into the second card hole 1703 to form a locking, thereby completing the front and rear position adjustment of the seat cushion 303.

[0179] As shown in Figure 39, another reversing mechanism includes two locking blocks 2 503 arranged on the adjusting rod 1403, and the two locking blocks 2 503 are symmetrically arranged relative to the center of the adjusting rod 1403. The plane of the seat cushion 303 intersects with the axis of the adjusting rod 1403 and is not perpendicular, and the seat cushion 303 is rotatably arranged at the upper end of the adjusting rod 1403; press button five 603 to push one of the locking blocks 2 503 out of the lock hole 2 703, thereby unlocking the seat cushion 303, pulling the adjusting rod 1403 out of the adjusting channel 1803, rotating the seat cushion 303 180° and then inserting the adjusting rod 1403 into the adjusting channel 1803, so that the other locking block 2 503 is inserted into the lock hole 2 703 to form a lock, and rotating the seat cushion 303 to a horizontal position.

[0180] As shown in Figure 40, the third reversing mechanism includes two adjustment channels 1803 opened on the base 403. The two adjustment channels 1803 and the two upper and lower locking mechanisms are symmetrically arranged relative to the center of the base 403. The plane of the seat cushion 303 intersects with the axis of the adjustment rod 1403 and is not perpendicular; press button five 603, push the locking block two 503 out of the lock hole two 703 to unlock the seat cushion 303, pull the adjusting rod 1403 out of the adjustment channel 1803, rotate the seat cushion 303 180° to reverse, and insert the adjusting rod 1403 into another adjustment channel 1803, so that the locking block two 503 is inserted into the lock hole two 703 of the other adjustment channel 1803 to form a lock.

[0181] As shown in Figure 41, the fourth reversing mechanism includes a crossbeam 2103 fixed on the vehicle beam 1 and a sliding sleeve 2203 fixed on the base 403. The base 403 is horizontally slidably set on the crossbeam 2103 through the sliding sleeve 2203. The above-mentioned limiting mechanism is arranged between the base 403 and the crossbeam 2103. Each second card hole 1703 is opened on the crossbeam 2103. The plane of the seat cushion 303 is perpendicular to the axis of the adjusting rod 1403; press button six 1103 to unlock the base 403, pull the base 403 and the seat cushion 303 horizontally out of the crossbeam 2103, rotate the seat cushion 303 and the base 403 to reverse, and then insert the base 403 into the crossbeam 2103 to form a lock.

[0182] The fifth reversing mechanism is formed by dividing the base 403 into an upper base and a lower base from top to bottom. The upper base is rotatably arranged on the lower base, and the lower base is slidably arranged on the vehicle beam 1 forward and backward. The seat cushion 303 is arranged on the upper base, and the upper base is rotated 180 degrees for reversing.

[0183] As shown in Figures 42 and 43, another limiting mechanism includes a button five 3003 movably set on the base 403, a positioning hole two 3103 provided on the base 403, and a positioning column two 3203 movably set on the beam 1. Several positioning holes two 3103 are arranged at intervals along the length direction of the beam 1. When the base 403 moves back and forth along the beam 1, the positioning columns two 3203 can correspond to each positioning hole two 3103 one by one. An elastic member three 3303 is also provided in the beam 1 for driving the positioning column two 3203 to insert into the positioning hole two 3103 to form a lock; the button five 3003 is slidably set on the base 403 along the length direction of the beam 1, and a sliding cavity is provided on the button five 3003, which is movably provided with a A positioning block 2 34 is provided with a plurality of oblique guide grooves 2 3503 on the button 5 3003, and a plurality of guide posts 2 3603 corresponding to the oblique guide grooves 2 3503 are fixed on the positioning block 2 34, and the guide posts 2 3603 are inserted into the oblique guide grooves 2 3503, and the positioning block 2 34 is raised and lowered relative to the button 5 3003 along the oblique guide grooves 2 3503 through the guide posts 2 3603; a plurality of protruding posts 2 3703 corresponding to the positions of the positioning holes 2 3103 are fixed at the bottom of the positioning block 2 34, and when the button 5 3003 is pressed, the button 5 3003 pushes the positioning block 2 34 down, so that the protruding posts 2 3703 extend into the positioning holes 2 3103 and the positioning posts 2 3203 are withdrawn from the positioning holes 2 3103 to form unlocking.

Claims

1. A baby carriage, comprising a carriage body, characterized in that: A mounting hole is provided at the rear end of the vehicle body, and a rear push rod is inserted into the mounting hole through a detachable connecting structure. A storage structure for storing the removed rear push rod is provided on the vehicle body. The storage structure is a storage tube hole provided on the vehicle body, and a storage device for keeping the rear push rod in the storage tube hole is provided between the rear push rod and the storage tube hole. After the rear push rod is inserted into the storage tube hole, the end is exposed relative to the storage tube hole.

2. A baby carriage according to claim 1, characterized in that: The outer end of the receiving tube hole is also provided with an end cover for covering the exposed part of the rear push rod.

3. A baby carriage according to claim 1 or 2, characterized in that: The baby carriage also includes a blocking member, which can only block the outer port of the above-mentioned installation hole or the storage tube hole, or can selectively block the outer port of the above-mentioned installation hole or the storage tube hole.

4. A baby carriage according to claim 1 or 2, characterized in that: The mounting hole and the tube receiving hole are communicated with each other.

5. A baby carriage according to claim 3, characterized in that: The blocking member includes a first cover plate and a second cover plate respectively used to block the mounting hole and the storage tube hole. The two cover plates are connected together on a rotating shaft and are in a "V" shape. The blocking member is arranged in an inner cavity connected to the storage tube hole and the mounting hole through rotation of the rotating shaft. When the rear push rod is inserted from the mounting hole, it can push open the first cover plate and drive the second cover plate to cover the outer port of the storage tube hole. When the rear push rod is inserted from the outer port of the storage tube hole, it can push open the second cover plate and drive the first cover plate to cover the mounting hole.

6. A baby carriage according to claim 3, characterized in that: The blocking member comprises a blocking member and a connecting rope, one end of the connecting rope is connected to the vehicle body, and the other end is connected to the blocking member, and the blocking member can cooperate with the outer port of the above-mentioned mounting hole or the storage tube hole for blocking.

7. A baby carriage according to claim 1 or 2, characterized in that: A storage device is provided between the rear push rod and the storage tube hole to keep the rear push rod in the storage tube hole.

8. A baby carriage according to claim 7, characterized in that: The storage device includes a card slot on the rear push rod and a card ring arranged in the storage tube hole. After the rear push rod is inserted into the storage tube hole, the card ring can be inserted into the corresponding card slot, so that the rear push rod is locked in the axial direction of the storage tube hole. An unlocking mechanism is also provided between the card ring and the vehicle beam.

9. A baby carriage according to claim 1 or 2, characterized in that: A force-storage elastic member is provided in the storage tube hole or on the rear push rod. When the rear push rod is inserted into the storage tube hole, the force-storage elastic member is compressed.

10. A baby carriage according to claim 8, characterized in that: The detachable connection structure includes an unlocking button, a latch and an elastic member. The elastic member and the latch are arranged in the rear push rod. The latch can simultaneously pass through the rear push rod and the side wall of the mounting hole under the elastic force of the elastic member to combine the rear push rod and the mounting hole. The unlocking button can push the outer end of the latch away from the rotating seat to separate the rear push rod and the mounting hole.

11. A baby carriage according to claim 10, characterized in that: The unlocking mechanism includes a driving frame, and the clamping ring is fixed to the driving frame. The unlocking button is provided with a driving inclined surface that abuts against the inner ring of the driving frame. When the unlocking button is pressed, the driving inclined surface can push the driving frame and the clamping ring away from the slot to unlock. A first return spring is also provided between the driving frame and the frame to drive the driving frame and the clamping ring to move toward the slot.

12. A baby carriage according to claim 1, characterized in that: The vehicle body includes a vehicle beam, a handlebar upright, a handle assembly, a front wheel assembly, a rear wheel assembly and a seat. The handlebar upright is arranged at the front end of the vehicle beam, the upper end is connected to the handle assembly, and the lower end is connected to the front wheel assembly. The seat and the rear wheel assembly are arranged on the vehicle beam. A steering hole is provided at the rear end of the vehicle beam, and a rotating seat is provided in the steering hole. A storage channel is provided on the rotating seat for the rear push rod to pass through in the storage state, and the storage channel is connected to the above-mentioned storage tube hole.

13. A baby carriage according to claim 1, characterized in that: The vehicle body includes a vehicle beam, a handlebar upright, a handle assembly, a front wheel assembly, a rear wheel assembly and a seat. The handlebar upright is arranged at the front end of the vehicle beam, the upper end is connected to the handle assembly, and the lower end is connected to the front wheel assembly. The seat and the rear wheel assembly are arranged on the vehicle beam. A steering hole is provided at the rear end of the vehicle beam, and a rotating seat is provided in the steering hole. A storage channel is provided on the rotating seat for the rear push rod to pass through in the storage state, and the storage channel is connected to the above-mentioned storage tube hole.

14. A baby carriage according to claim 13, characterized in that: A connecting seat is fixedly arranged on the handlebar upright on the side facing the vehicle beam, and the connecting seat is rotatably connected to the front end of the vehicle beam through the above-mentioned first rotating shaft. The front end of the vehicle beam has an arc-shaped rotating matching groove. The shape of one end of the connecting seat connected to the vehicle beam matches the above-mentioned rotating matching groove, and the center of the circle corresponding to the arc surface of the above-mentioned rotating matching groove is the above-mentioned first rotating shaft.

15. A baby carriage according to claim 14, characterized in that: The front end of the vehicle beam is provided with a connector protruding from the groove surface of the rotation matching groove, the above-mentioned connecting seat is provided with a socket corresponding to the connector, the connector is inserted into the socket, and the above-mentioned first rotating shaft is arranged on the connector.

16. A baby carriage according to claim 1, characterized in that: The push rod comprises a rod body and a handle rotatably arranged on the top of the rod body, and an angle maintaining mechanism is arranged between the handle and the rod body to maintain a corresponding angle between the handle and the rod body.

17. A baby carriage according to claim 12, characterized in that: The rear wheel assembly includes a rear wheel frame, a rear fork assembly and a rear wheel, the rear wheel frame is arranged on the above-mentioned vehicle beam, and the rear wheel is arranged on the rear wheel frame through the rear fork assembly. In the above-mentioned baby carriage, the rear fork assembly includes two rear fork rods, one end of each rear fork rod is provided with a converter and is rotatably connected to the rear wheel frame, and the other end is connected to the rear wheel, the two rear fork rods swing around the axis of their respective converters to make the two rear wheels approach or separate, and the baby carriage also includes a front locking device and a rear locking device, both locking devices are used to lock and maintain the opening and closing angles of the two rear fork rods, the front locking device acts on the two converters, and the rear locking device is arranged between the front locking device and the rear wheel, and acts on the rear fork rod.

18. A baby carriage according to claim 17, characterized in that: The front locking device comprises a front clamping block and a front unlocking device. The outer sides of the two adapters are provided with locking bayonet holes. The locking bayonet holes on the two adapters correspond to each other in a group of two. The front clamping block can be simultaneously inserted into the two locking bayonet holes in the same group to limit the rotation of the adapter. The front unlocking device controls the movement of the front clamping block to switch the front clamping block between the locked position and the unlocked position. There are at least two locking bayonet holes on each adapter, which are divided into a closed bayonet hole and at least one unfolded bayonet hole. The outer side of the adapter is also provided with a section of teeth, and the teeth of the two adapters are meshed with each other. The front unlocking device comprises a front unlocking button and a front reset spring. A front guide groove is provided for the reciprocating movement of the front clamping block and the front unlocking button, one end of the front unlocking button is exposed, and the other end extends into the front guide groove and can push the front clamping block to move, the front clamping block is arranged in the front guide groove, and the front return spring controls the front clamping block to return to its original position after the pressing external force is withdrawn; a front avoidance notch is provided on the side of one end of the front clamping block facing the front unlocking button, and when the front avoidance notch and the locking bayonet are in the same plane, the distance between the side wall of the avoidance notch and the central axis of the adapter is greater than the radius of the adapter, the rear locking device includes a rear clamping block and a rear unlocking device, an arc-shaped upper locking insert is provided on the inner side of a rear fork rod, and the other rear fork rod is provided with an arc-shaped upper locking insert. The inner side of the rear fork rod is provided with an arc-shaped lower locking plug, the upper locking plug and the lower locking plug are arranged in an up-and-down manner, and at least two locking notches are provided on the upper locking plug and the lower locking plug, which are divided into a closed notch and at least one expanded notch. When the two locking plugs swing with their respective rear fork rods, the upper and lower locking notches of the two locking plugs can be directly opposite to each other in the locked position, or the two corresponding expanded notches can be directly opposite to each other in the expanded state, and the rear clamping block can be simultaneously inserted into the upper and lower corresponding locking notches to limit the swing of the two rear fork rods, and the rear unlocking device controls the movement of the rear clamping block to make the rear clamping block in the locked position and the unlocked position. The rear unlocking device includes a rear unlocking button and a rear return spring, a rear guide groove is provided on the rear wheel frame for the reciprocating movement of the rear clamping block and the rear unlocking button, one end of the rear unlocking button is exposed, and the other end extends into the rear guide groove and can push the rear clamping block to move, the rear clamping block is arranged in the rear guide groove, and the rear return spring controls the rear clamping block to reset after the pressing external force is cancelled. In the above-mentioned baby carriage, a rear avoidance notch is provided on the side of one end of the rear clamping block facing the rear unlocking button; the front clamping block and the rear clamping block are integrated into a whole, the front guide groove and the rear guide groove are connected as a whole, and the front unlocking button and the rear unlocking button are integrated as a whole.

19. A baby carriage according to claim 17, characterized in that: The rear wheel frame and the seat can move forward and backward relative to the vehicle beam respectively without interfering with each other during movement. A locking mechanism is provided between the rear wheel frame and the vehicle beam for locking the relative position of the rear wheel frame and the vehicle beam, and a locking mechanism is provided between the seat and the vehicle beam for locking the relative position of the seat and the vehicle beam.

20. A baby carriage according to claim 12 or 19, characterized in that: The seat includes a base and a cushion, the base is slidably arranged on the vehicle beam, the above-mentioned cushion is arranged on the base, an adjustment rod is arranged between the cushion and the base, an adjustment channel is opened at the bottom of the cushion or the upper end surface of the base, one end of the adjustment rod is inserted into the adjustment channel and rises and falls along the adjustment channel, and the other end is fixedly connected to the base or the cushion, and an upper and lower locking mechanism is arranged between the adjustment rod and the adjustment channel for locking the relative position of the adjustment rod and the adjustment channel; the base is slidably arranged on the frame front and back, and a limiting mechanism is also arranged between the base and the frame for locking the relative position of the base and the frame; a reversing mechanism is also arranged between the cushion and the base for turning the seat cushion around and making the seat cushion orientation mirror-symmetrical with the original orientation.

21. A baby carriage according to claim 20, characterized in that: The upper and lower locking mechanism includes a button 5 movably arranged on the base, a lock hole 2 provided on the adjustment channel, and a lock block 2 arranged on the adjustment rod. A plurality of lock holes 2 are arranged at intervals along the moving direction of the seat cushion. When the seat cushion is raised or lowered relative to the base, the lock blocks 2 can correspond one-to-one with each lock hole 2. A plurality of push rods corresponding one-to-one to the positions of each lock hole 2 are fixed on the button 5; the lock block 2 is arranged on the adjustment rod for transverse sliding, and a reset spring 1 is also provided in the seat cushion for pushing the lock block 2 to translate so that the lock block 2 is inserted into the lock hole 2 to form a lock. The button 5 is arranged on the base for transverse sliding, and the sliding direction of the button 5 is consistent with the sliding direction of the lock block 2. Pressing the button 5 causes each push rod to be inserted into the lock hole 2 and push the lock block 2 out of the lock hole 2 to form an unlocking.

22. A baby carriage according to claim 20, characterized in that: The limiting mechanism includes a button six and a second push block, a plurality of second clamping holes are provided on the frame, and the plurality of second clamping holes are arranged at intervals along the length direction of the frame, a slide groove is provided on the base, and the button six is ​​slidably arranged in the slide groove along the length direction of the slider, the outer end of the button six extends out of the slide groove, the inner end of the button six abuts against the second push block, and the abutting surface between the button six and the second push block is an inclined surface, and a limiting block two is fixedly provided on the second push block. When the button six is ​​pressed, the button six pushes the second push block to rise and fall through the inclined abutting surface, so that the limiting block two withdraws from the second clamping hole to form unlocking, and a reset spring four is also provided in the slide groove to push the second push block to reset, so that the limiting block two is inserted into the second clamping hole to form locking.

23. A baby carriage according to claim 20, characterized in that: The limiting mechanism comprises a button 5 movably arranged on the base, a positioning hole 2 provided on the base, and a positioning column 2 movably arranged on the frame, and the plurality of positioning holes 2 are arranged at intervals along the length direction of the frame. When the base moves forward and backward along the frame, the positioning columns 2 can correspond to each positioning hole 2 one by one. An elastic member 3 is also provided in the frame for driving the positioning columns 2 to insert into the positioning holes 2 to form a lock; the button 5 is slidably arranged on the base along the length direction of the frame, and a sliding cavity is provided on the button 5, and a positioning block 2 is movably provided in the sliding cavity, and a plurality of inclined guide grooves 2 are provided on the button 5, and a plurality of guide columns 2 corresponding to each inclined guide groove 2 one by one are fixed on the positioning block 2, and the guide columns 2 are inserted into the inclined guide grooves 2, and the positioning block 2 is lifted and lowered relative to the button 5 along the inclined guide grooves 2 through the guide columns 2; a plurality of convex columns 2 corresponding to the positions of each positioning hole 2 one by one are fixed at the bottom of the positioning block 2, and the button 5 is pressed, and the button 5 pushes the positioning block 2 to descend, so that each convex column 2 extends into the positioning hole 2 and the positioning column 2 is withdrawn from the positioning hole 2 to form an unlocking.

24. A baby carriage according to claim 20, characterized in that: The reversing mechanism includes two locking blocks 2 arranged on the adjusting rod, and the two locking blocks 2 are symmetrically arranged relative to the center of the adjusting rod, and the plane of the seat cushion is perpendicular to the axis of the adjusting rod; pressing button 5, push one of the locking blocks 2 to exit the lock hole 2, thereby unlocking the seat cushion, pulling the adjusting rod out of the adjustment channel, rotating the seat cushion to reverse, and inserting the adjusting rod into the adjustment channel, so that the other locking block 2 is inserted into the lock hole 2 to form a lock.

25. A baby carriage according to claim 20, characterized in that: The reversing mechanism includes two locking blocks 2 arranged on the adjusting rod, and the two locking blocks 2 are symmetrically arranged relative to the center of the adjusting rod. The plane of the seat cushion intersects with the axis of the adjusting rod and is not perpendicular. The seat cushion is rotatably arranged at the upper end of the adjusting rod; pressing button 5, push one of the locking blocks 2 to exit the locking hole 2, thereby unlocking the seat cushion, pulling the adjusting rod out of the adjusting channel, rotating the seat cushion to reverse direction, inserting the adjusting rod into the adjusting channel, so that the other locking block 2 is inserted into the locking hole 2 to form a lock, and rotating the seat cushion to a horizontal state.

26. A baby carriage according to claim 20, characterized in that: The reversing mechanism includes two adjustment channels opened on the base, the two adjustment channels and two upper and lower locking mechanisms are arranged symmetrically relative to the center of the base, and the plane of the seat cushion intersects with the axis of the adjustment rod and is not perpendicular; pressing button five, pushing the locking block two to exit the locking hole two to unlock the seat cushion, pulling the adjusting rod out of the adjustment channel, rotating the seat cushion to reverse, and inserting the adjusting rod into another adjustment channel, so that the locking block two is inserted into the locking hole two of the other adjustment channel to form a lock.

27. A baby carriage according to claim 20, characterized in that: The reversing mechanism includes a crossbeam fixed on the frame and a sliding sleeve fixed on the base. The base is horizontally slidably set on the crossbeam through the sliding sleeve. The above-mentioned limiting mechanism is set between the base and the crossbeam. Each second clamping hole is opened on the crossbeam. The plane of the seat cushion is perpendicular to the axis of the adjusting rod. Press button six to unlock the base, pull the base and the seat cushion horizontally out of the crossbeam, rotate the seat cushion and the base to reverse, and then insert the base into the crossbeam to form a lock.

28. A baby carriage according to claim 20, characterized in that: The reversing mechanism is formed by dividing the base into an upper base and a lower base from top to bottom. The upper base is rotatably arranged on the lower base, the lower base is slidably arranged on the frame, the seat cushion is arranged on the upper base, and the upper base is rotated 180 degrees to perform reversing.

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