Adjustable baby balance bike

Abstract

An adjustable baby balance bike, relating to the technical field of baby balance bikes, and solving the technical problems that the distance between front wheels and rear wheels of an existing baby balance bike is fixed, the total length of a vehicle body is fixed, and a seat is fixedly arranged on a frame. The adjustable baby balance bike comprises a frame, a seat, front wheels disposed at the front end of the frame, and rear wheels disposed at the rear end of the frame. The rear wheels are disposed on the frame by means of a wheel seat, and the rear wheels are rotatably arranged on the wheel seat; and an insertion beam is provided at the rear end of the frame, the insertion beam is inserted into the wheel seat, and a length adjusting mechanism is provided between the wheel seat and the insertion beam to adjust the insertion depth of the insertion beam.

Description

Adjustable baby carriage Technical Field

[0001] The invention belongs to the technical field of baby carriages and relates to a baby carriage with an adjustable body. Background Art

[0002] A baby carriage is a very common children's toy car on the market. The Chinese invention patent with announcement number CN206265223U discloses a children's balance scooter, which includes a frame, a support tube welded to the front end of the frame, a support rod arranged in the support tube, a handlebar welded to the upper end of the support rod, a shaft sleeve welded to the lower end of the support rod, a connecting shaft passed through the shaft sleeve, a left front wheel is arranged at the left end of the connecting shaft, a right front wheel is arranged at the right end of the connecting shaft, and the left front wheel and the right front wheel are symmetrically arranged; a left rear wheel and a right rear wheel are arranged at the rear end of the frame, and the left rear wheel and the right rear wheel are symmetrically arranged, a convex rod is integrally provided in the middle part of the frame, and a seat is detachably provided at the upper end of the convex rod.

[0003] The distance between the front and rear wheels of this type of children's car is fixed, the total length of the car body is also fixed, and the seat is fixed on the frame. However, since children grow relatively rapidly nowadays, the body of the children's car is relatively short, and the position of the seat is relatively too forward. A children's car that has been bought not long ago may not be suitable for children to ride.

[0004] To this end, many stroller manufacturers have developed strollers with adjustable seat heights. These heights can be adjusted to accommodate changes in a child's height. For example, the lower end of the seat is inserted into the frame via a seat rod, which adjusts relative to the frame and is locked with a resilient latch. Unlocking the seat requires pressing the resilient latch, which is difficult to fully depress and retracts into the support tube beneath the seat. This makes unlocking the seat more laborious, making it difficult to adjust the height of the stroller seat.

[0005] In addition, many strollers also function as pushchairs. When parents push the stroller using the rear push rod, if they cannot turn the seat back, they cannot take good care of the child. Technical issues

[0006] The purpose of the present invention is to solve the above problems existing in existing baby carriages and to provide a baby carriage with adjustable body size. Technical Solutions

[0007] An adjustable baby carriage comprises a frame, a seat, a front wheel arranged at the front end of the frame, and a rear wheel arranged at the rear end of the frame. The rear wheel is arranged on the frame through a wheel seat, and the rear wheel is rotatably arranged on the wheel seat. The invention is characterized in that an insertion beam is provided at the rear end of the frame, the insertion beam is inserted into the wheel seat, and a length adjustment mechanism is provided between the wheel seat and the insertion beam to adjust the insertion depth of the insertion beam.

[0008] In the above-mentioned adjustable baby carriage, the length adjustment mechanism includes a socket provided on the wheel seat, the insertion beam is inserted into the socket and moves back and forth along the socket, the cross-sectional shape of the socket is adapted to the cross-sectional shape of the insertion beam, and a length locking mechanism is further provided between the socket and the insertion beam, which is used to lock the relative position of the insertion beam and the socket.

[0009] In the above-mentioned adjustable baby carriage, a guide groove is provided at the rear end of the insertion beam, and the guide groove extends along the length direction of the insertion beam. A guide rod is fixed in the wheel seat. When the rear end of the insertion beam extends into the slide groove, the guide rod is correspondingly inserted into the guide groove. When the wheel seat moves back and forth along the insertion beam, the guide rod moves synchronously along the guide groove.

[0010] In the above-mentioned adjustable baby carriage, the guide rod is inserted into the beam horizontally.

[0011] In the above-mentioned adjustable baby carriage, the outer end of the guide groove is open, and the guide rod can be inserted into the guide groove along the opening.

[0012] In the above-mentioned adjustable baby carriage, an anti-unhooking device is further provided between the insertion beam and the wheel seat to prevent the insertion beam from escaping from the wheel seat.

[0013] In the above-mentioned adjustable baby stroller, the length locking mechanism includes a button 1 arranged on the wheel seat and a lock hole opened on the insertion beam. Several lock holes are arranged at intervals along the length direction of the insertion beam. A mounting hole is opened on the wheel seat. Button 1 is slidably arranged in the mounting hole along the length direction of the insertion beam. The outer end of button 1 extends out of the mounting hole. A locking block is also provided in the mounting hole. The inner end of button 1 abuts against the locking block. The abutting surface between button 1 and the locking block is an inclined surface. A limit block is fixed on the locking block. The limit block extends into the slide. When button 1 is pressed, button 1 pushes the locking block up and down through the inclined abutting surface, so that the limit block exits the card hole to form unlocking. A reset spring 1 is also provided in the mounting hole to push the lock block to reset, so that the limit block is inserted into the card hole to form locking.

[0014] In the above-mentioned adjustable baby stroller, the length locking mechanism includes a button four movably arranged on the wheel seat, a mounting hole provided on the wheel seat, and a mounting post movably arranged on the insertion beam, wherein the plurality of mounting holes are arranged at intervals along the length direction of the insertion beam. When the wheel seat moves forward and backward along the insertion beam, the mounting posts can correspond to each mounting hole one by one, and an elastic member two is further provided in the insertion beam for driving the mounting posts to insert into the mounting holes to form a lock; the button four is slidably arranged on the wheel seat along the length direction of the insertion beam, and a sliding cavity is provided on the button four, and a mounting block is movably provided in the sliding cavity. The button four is provided with a plurality of oblique slots, and the mounting block is fixedly provided with a plurality of guide blocks corresponding to each oblique slot, and the guide blocks are inserted into the oblique slots. The mounting block is lifted and lowered relative to the button four along the oblique slots by the guide blocks; the bottom of the mounting block is fixedly provided with a plurality of protrusions corresponding to the positions of the mounting holes one by one. When the button four is pressed, the button four pushes the mounting block down, so that the protrusions extend into the mounting holes and the mounting posts are withdrawn from the mounting holes to form an unlocking.

[0015] In the above-mentioned adjustable baby carriage, the seat is slidably arranged on the frame along the length direction of the frame, and a front and rear limiting mechanism is provided between the seat and the frame for locking the relative position of the seat and the frame.

[0016] In the above-mentioned adjustable baby carriage, the front and rear limit mechanisms include a button 2 arranged on the seat and a card hole opened on the frame, and several card holes are arranged at intervals along the length direction of the frame. A slide groove is opened on the seat, and the button 2 is slidably arranged in the slide groove along the length direction of the slider. The outer end of the button 2 extends out of the slide groove, and a push block is also provided in the slide groove. The inner end of the button 2 is against the push block, and the abutment surface between the button 2 and the push block is an inclined surface. A pin is fixed on the push block. When the button 2 is pressed, the button 2 pushes the push block up and down through the inclined abutment surface, so that the pin exits the card hole to form unlocking. A reset spring 2 is also provided in the slide groove for pushing the push block to reset, so that the pin is inserted into the card hole to form locking.

[0017] In the above-mentioned adjustable baby stroller, the front and rear limit mechanism includes a button three movably arranged on the seat, a positioning hole provided on the seat, and a positioning column movably provided on the frame, wherein the plurality of positioning holes are arranged at intervals along the length direction of the frame. When the seat moves forward and backward along the frame, the positioning columns can correspond to each positioning hole one by one, and an elastic member one is further provided in the frame for driving the positioning columns to insert into the positioning holes to form a lock; the button three is slidably arranged on the seat along the length direction of the frame, a sliding cavity is provided on the button three, and a positioning block is movably provided in the sliding cavity, the button three is provided with a plurality of inclined guide grooves, the positioning block is fixedly provided with a plurality of guide columns corresponding to each inclined guide groove one by one, the guide columns are inserted into the inclined guide grooves, and the positioning block is lifted and lowered relative to the button three along the inclined guide grooves through the guide columns; the bottom of the positioning block is fixedly provided with a plurality of protrusions corresponding to the positions of the positioning holes one by one, and when the button three is pressed, the button three pushes the positioning block down, so that the protrusions extend into the positioning holes and the positioning columns withdraw from the positioning holes to form an unlocking.

[0018] In the above-mentioned adjustable baby carriage, an extension piece is fixedly provided at the rear end of the insertion beam, and a guide groove is provided on the extension piece. The guide groove extends along the length direction of the insertion beam, and a guide rod is fixedly provided in the wheel seat. When the rear end of the insertion beam extends into the slide groove, the guide rod is correspondingly inserted into the guide groove. When the wheel seat moves back and forth along the insertion beam, the guide rod moves synchronously along the guide groove; the guide rod horizontally passes through the extension piece.

[0019] In the above-mentioned adjustable baby carriage, the seat is arranged on a wheel seat, a base is fixed on the wheel seat, the seat is arranged on the base and can be raised and lowered relative to the base, and an upper and lower locking mechanism is also provided between the seat and the base for locking the relative position of the seat and the base.

[0020] In the above-mentioned adjustable baby carriage, the upper and lower locking mechanisms include a button five movably arranged on the base, a lock hole two opened on the base, and a lock block three arranged on the seat. Several lock holes two are arranged at intervals along the moving direction of the seat. When the seat is raised or lowered relative to the base, the lock blocks three 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 three is arranged on the seat for horizontal sliding, and a return spring one is also provided in the seat for pushing the lock block three to move horizontally so that the lock block three is inserted into the lock hole two to form a lock. The button five is arranged on the base for horizontal sliding, and the sliding direction of the button five is consistent with the sliding direction of the lock block three. Press the button five to insert the push rods into the lock hole two and push the lock block three out of the lock hole two to form an unlock.

[0021] In the above-mentioned adjustable baby carriage, the length locking mechanism includes a limiting hole opened on the wheel seat and a limiting column movably arranged on the insertion beam. Several limiting holes are arranged at intervals along the insertion direction of the insertion beam. When the insertion beam moves back and forth along the wheel seat, the limiting columns can correspond to each limiting hole one by one. An elastic member 14 is also provided in the frame for driving the limiting column to insert into the limiting hole to form a lock.

[0022] In the above-mentioned adjustable baby carriage, the length locking mechanism includes a button six and a push block two, a plurality of card holes two are provided on the frame, and the plurality of card holes two 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 push block two, and the abutting surface between the button six and the push block two is an inclined surface, and a limit block two is fixed on the push block two. When the button six is ​​pressed, the button six pushes the push block two up and down through the inclined abutting surface, so that the limit block two exits the card hole two to form unlocking, and a reset spring three is also provided in the slide groove to push the push block two to reset, so that the limit block two is inserted into the card hole two to form locking.

[0023] In the above-mentioned adjustable baby carriage, the length locking mechanism includes a button 7 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 also provided in the frame for driving the positioning columns 2 to insert into the positioning holes 2 to form a lock; the button 7 is slidably arranged on the base along the length direction of the frame, and a sliding cavity is provided on the button 7. A positioning block 2 is movably provided in the sliding cavity. The button 7 is provided with a plurality of inclined guide grooves 2, and 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 7 along the inclined guide grooves 2 through the guide columns 2; a plurality of protrusions 2 are fixed at the bottom of the positioning block 2, which correspond one-to-one to the positions of the positioning holes 2. When the button 7 is pressed, the button 7 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.

[0024] In the above-mentioned adjustable baby carriage, a guide rod 2 is fixedly provided at the bottom of the seat, a guide channel is provided on the base, the guide rod 2 is inserted into the guide channel and rises and falls along the guide channel; a long guide groove is provided on the frame, the guide rod 2 is inserted into the long guide groove, and when the seat moves forward and backward relative to the frame, the guide rod 2 moves back and forth synchronously along the long guide groove.

[0025] In the above-mentioned adjustable baby carriage, an adjustment rod is fixedly provided on the base, an adjustment channel is provided at the bottom of the seat, and the adjustment rod is inserted into the adjustment channel and rises and falls along the adjustment channel.

[0026] In the above-mentioned adjustable baby stroller, the upper end of the insertion hole is open and the lower end is closed.

[0027] In the above-mentioned adjustable baby carriage, an anti-unhooking device is further provided between the insertion beam and the wheel seat to prevent the insertion beam from coming out of the insertion hole of the wheel seat.

[0028] In the above-mentioned adjustable baby carriage, it is characterized in that a sliding adjustment groove is provided on the frame, and a sliding seat is fixedly provided at the bottom of the seat. The sliding seat can be directly inserted into the notch of the sliding adjustment groove and can be maintained in the sliding adjustment groove and reciprocate along the sliding adjustment groove. An anti-unhooking structure is provided between the sliding seat and the sliding adjustment groove to prevent the sliding seat from being pulled out of the notch of the sliding adjustment groove.

[0029] In the above-mentioned adjustable baby carriage, the sliding seat includes a plug-in portion, the anti-unhooking structure includes a blocking member and a retaining edge arranged on the side of the sliding adjustment groove, the blocking member is arranged in the sliding adjustment groove, the above-mentioned plug-in portion is inserted into the sliding adjustment groove and cooperates with the blocking member in the insertion and withdrawal direction, and a first blocking portion is provided on the blocking member, which is blocked by the retaining edge on the corresponding side when the blocking member is pulled out of the sliding adjustment groove.

[0030] In the above-mentioned adjustable baby carriage, the blocking member further includes a second blocking portion, at least one blocking block is provided on the side of the above-mentioned plug-in portion, and the second blocking portion blocks the movement path of the corresponding blocking block when it is pulled out of the sliding adjustment groove.

[0031] In the above-mentioned adjustable baby carriage, there are two plug-in parts, which are arranged in parallel, and a blocking block is provided on the same side of the lower end. The blocking block located on the outside is blocked by the retaining edge on the corresponding side of the sliding adjustment groove, and the other blocking block located between the two plug-in parts is blocked by the second blocking part of the above-mentioned blocking member.

[0032] In the above-mentioned adjustable baby carriage, there are two plug-in parts, which are arranged in parallel. Blocks are provided on the inner sides of the two plug-in parts facing each other, and two second blocking parts corresponding to the two above-mentioned blocks are provided on the blocking member. When the blocking block is pulled out of the sliding adjustment slot, it is blocked by the corresponding second blocking part.

[0033] In the above-mentioned adjustable baby carriage, there are two groups of card blocks, which are arranged on both sides of the plug-in part, and there are also two groups of corresponding ribs, which are arranged on both sides of the sliding adjustment groove. The blocking member is sheet-shaped and is located between the card block and the corresponding rib. One side of the blocking member overlaps with the projection of the card block in the insertion direction, and the other side overlaps with the projection of the rib in the insertion direction of the sliding seat.

[0034] In the above-mentioned adjustable baby carriage, the front and rear ends of the seat are provided with extension sections extending beyond the plug-in portion, and the extension sections are used to cover the sliding adjustment slot when the seat slides along the sliding adjustment slot.

[0035] In the above-mentioned adjustable baby stroller, the plug-in portion is fixedly connected to the blocking member, either directly or through a fastener.

[0036] In the above-mentioned adjustable baby carriage, the anti-unhooking structure further includes a support seat, which is arranged in the sliding adjustment groove and supported on the bottom of the sliding seat.

[0037] In the above-mentioned adjustable baby carriage, the blocking member is fixedly connected to the support seat via a connecting piece.

[0038] In the above-mentioned adjustable baby carriage, the contour shape of the support seat matches the cross-sectional shape of the sliding adjustment slot.

[0039] In the above-mentioned adjustable baby carriage, the outline shape of the support seat and the cross-sectional shape of the sliding adjustment groove are both elliptical or rugby-shaped.

[0040] In the above-mentioned adjustable baby carriage, when the lower end surface of the seat is against the frame, the distance between the upper end surface of the clamping block and the inner side surface of the retaining edge is adapted to the thickness of the blocking member.

[0041] In the above-mentioned adjustable baby carriage, the frame includes a beam, a front rotating frame and a front wheel rotating assembly. The beam is hollow and connected to the sliding adjustment groove. The front end opening is connected to the front rotating frame. The front wheel rotating assembly is rotatably set on the front rotating frame. The above-mentioned front wheel is rotatably set on the front wheel rotating assembly. The rear wheel is set on the beam, and the above-mentioned support seat can slide from the open end of the beam into the sliding adjustment groove.

[0042] In the above-mentioned adjustable baby carriage, an avoidance groove is reserved on the blocking member or between the blocking member and the sliding adjustment groove for inserting the seat adjustment rod and for adjusting the seat up and down, front and back.

[0043] In the above-mentioned adjustable baby carriage, a plurality of gear holes are provided at intervals on the support seat or the guard side, a slide groove is provided on the seat, a button eight and a push block three are provided in the slide groove, the inner end of the button eight is against the push block three, the abutting surface between the two is an inclined surface, the outer end of the button eight extends from one end of the slide groove, a latch two is fixed on the push block three, a pin hole communicating with the outside world is provided on the side wall of the slide groove, a return spring is provided between the push block three and the inner wall of the slide groove, and the push block three always has a movement tendency to extend the latch two from the pin hole under the action of the return spring, and the button eight can drive the push block three to overcome the action of the return spring and pull the latch two out of the corresponding gear hole.

[0044] In the above-mentioned adjustable baby carriage, the sliding seat includes a plug-in portion, the anti-unhooking structure includes a blocking member and a second blocking member opened on the blocking member, at least one blocking block is provided on the side of the above-mentioned plug-in portion, the second blocking member blocks the movement path of the corresponding blocking block when it is pulled out of the sliding adjustment groove, and the blocking member is fixedly arranged in the above-mentioned sliding adjustment groove.

[0045] In the above-mentioned adjustable baby carriage, a base is provided on the frame, and the seat is movably arranged on the base. The base is provided with multiple plug-in gears from top to bottom. A slide 2 is provided on the bottom surface of the seat, and a sliding matching structure is provided between the slide 2 and the above-mentioned plug-in gear. The slide 2 of the above-mentioned seat can be plugged in and matched with each plug-in gear to adjust the height of the seat. A reversing mechanism is also provided between the seat and the base for turning the seat around and making the seat orientation mirror-symmetrical with the original orientation.

[0046] In the above-mentioned adjustable baby carriage, the sliding fitting structure is located between the corresponding inner wall of the second slide and the outer wall of the base, including a slider and at least two second slide grooves, the second slide grooves are arranged in parallel from top to bottom, and the slider can be plugged into each second slide groove. The slider is arranged on the inner wall of the second slide or the outer wall of the base, and the corresponding second slide groove is arranged on the corresponding outer wall of the base or the inner wall of the second slide.

[0047] In the above-mentioned adjustable baby carriage, the second slideway is set on the base, and the above-mentioned sliding matching structure is provided between the two inner side walls of the second slideway and the two corresponding outer side walls of the base.

[0048] In the above-mentioned adjustable baby carriage, a locking mechanism 1 is further provided between the base and the seat. When the slide 2 is plugged into any plug-in gear position, the seat can be locked or unlocked with the base through the locking mechanism 1.

[0049] In the above-mentioned adjustable baby carriage, the locking mechanism includes a button 9 and a locking block 1, a pin 1 is fixedly provided on the locking block 1, and a plurality of lock holes 1 corresponding to each gear plug-in gear position are provided on the seat. When the above-mentioned seat is matched with different plug-in gear positions, the pin 1 can be aligned with and plugged into the corresponding lock hole 1. A guide groove 1 is provided on the base, and the button 9 and the locking block 1 are arranged in the guide groove 1. The outer end of the button 9 is exposed, and the inner end of the button 9 is against the locking block 1. The abutment surface between the button 9 and the locking block 1 is an inclined surface. When the button 9 is pressed inward, the button 9 pushes the locking block 1 to move horizontally along the length direction of the pin 1 through the inclined abutment surface, so that the pin 1 exits the lock hole 1 to form unlocking. A reset spring is also provided in the guide groove 1 for pushing the lock block 1 to reset, so that the pin 1 is inserted into the lock hole 1 to form locking.

[0050] In the above-mentioned adjustable stroller, the reversing mechanism is a slideway with one end extending through the seat, which can be engaged with each gear from the front or rear of the seat to achieve seat reversal. The seat can be reversible by being inserted upside down.

[0051] In the aforementioned adjustable stroller, the base includes a seat body and a connecting seat, the reversing mechanism includes a rotating shaft provided on the connecting seat and a second locking mechanism, the seat body is provided on the frame, the connecting seat is rotatably provided on the seat body via the rotating shaft and is locked and unlocked via the second locking mechanism, the multiple gears are all provided on the connecting seat, and the seat is plugged into and engaged with the connecting seat. Rotating the connecting seat allows the connecting seat to rotate together with the seat to achieve reversal.

[0052] In the above-mentioned adjustable baby carriage, an arc-shaped guide groove is provided on the seat body, and a guide block is provided on the connecting seat and is clamped in the guide groove. When the connecting seat rotates relative to the seat body, the guide block moves along the guide groove.

[0053] In the above-mentioned adjustable baby carriage, there are two guide grooves, which are symmetrically arranged with the above-mentioned rotating shaft as the center.

[0054] In the above-mentioned adjustable baby carriage, the locking mechanism 2 includes a button 10 and a locking block 2, a pin 2 is fixedly provided on the locking block 2, two lock holes 3 are provided on the seat body, and a guide groove 3 is provided on the connecting seat. The button 10 and the locking block 2 are arranged in the guide groove 3, the outer end of the button 10 is exposed, and the inner end of the button 10 is against the locking block 2. The abutment surface between the button 10 and the locking block 2 is an inclined surface. When the button 10 is pressed inward, the button 10 pushes the locking block 2 to move horizontally along the length direction of the pin 2 through the inclined abutment surface, so that the pin 2 exits the lock hole 3 to form unlocking. A reset spring 4 is also provided in the guide groove 3 to push the lock block 2 to reset, so that the pin 2 is inserted into the lock hole 3 to form locking.

[0055] In the above-mentioned adjustable baby carriage, a slide rail is provided on the frame, the above-mentioned base is provided on the slide rail and can reciprocate along the slide rail, and a locking mechanism three is provided between the base and the slide rail for locking the base in different positions of the slide rail.

[0056] In the above-mentioned adjustable baby carriage, a through guide hole is provided on the base, and the frame fits through the guide hole. A locking mechanism three is provided between the base and the frame for locking the base and maintaining it at different positions of the frame.

[0057] In the above-mentioned adjustable baby carriage, the locking mechanism three includes a button eleven and a locking block four, a pin three is fixedly provided on the locking block four, a plurality of lock holes four are spaced apart on the frame along the sliding direction of the base, a guide groove four is provided on the base, the button eleven and the locking block four are arranged in the guide groove four, the outer end of the button eleven is exposed, and the inner end of the button eleven is against the locking block four, and the abutment surface between the button eleven and the locking block four is an inclined surface. When the button eleven is pressed inward, the button eleven pushes the locking block four to move horizontally along the length direction of the pin three through the inclined abutment surface, so that the pin three exits the corresponding lock hole four to be unlocked, and a reset spring five is also provided in the guide groove four to push the lock block four to reset, so that the pin three is inserted into the corresponding lock hole four to be locked.

[0058] In the above-mentioned adjustable baby carriage, the seat includes a seat cushion and a backrest, and the seat is also provided with a safety belt or a guardrail. Beneficial effects

[0059] Compared to existing technologies, the rear wheels of this invention can translate along the insert beam, adjusting the distance between the front and rear wheels and thus adjusting the vehicle length. The seat can also translate along the insert beam, allowing for adaptive adjustment for children of varying heights. The rear wheels and seat can translate together via the wheel base, adjusting the distance between the front and rear wheels and thus adjusting the vehicle length. The seat can also be raised and lowered along the base, allowing for adaptive adjustment for children of varying heights. The seat can be adjusted along the length of the beam, allowing for adaptive adjustment for children of varying heights. An anti-unhook structure allows the seat to be securely mounted to the frame, preventing any movement after installation. The seat can be adjusted for height and position, both vertically and horizontally, allowing for adaptive adjustment for children of varying heights. The seat features a reversible seat function, allowing the stroller to function as a pushchair, allowing the child to face the rear, making it easier for parents to care for the child. Height and fore-and-aft adjustments are simple and convenient, achieved with the push of a button. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] FIG1 is a schematic diagram of the overall structure of a baby carriage according to the present invention.

[0061] FIG2 is a schematic structural diagram of the insert beam of the present invention.

[0062] FIG3 is a schematic structural diagram of the lock hole and the guide groove of the present invention.

[0063] FIG4 is a schematic structural diagram of a wheel seat of the present invention.

[0064] FIG. 5 is a cross-sectional view of an embodiment of the length locking mechanism of the present invention.

[0065] FIG6 is a schematic diagram of the installation of the seat and the frame of the present invention.

[0066] FIG7 is a cross-sectional view of one embodiment of the front and rear limiting mechanism of the present invention.

[0067] FIG8 is a schematic diagram of one embodiment of the front and rear limiting mechanism of the present invention.

[0068] FIG9 is a schematic diagram of a length locking mechanism according to embodiment 2 of the present invention.

[0069] FIG10 is a cross-sectional view of a length locking mechanism according to embodiment 2 of the present invention.

[0070] FIG11 is a schematic diagram of the front and rear limiting mechanism of Example 3 of the present invention.

[0071] FIG12 is a cross-sectional view of the front and rear limiting mechanism of embodiment 3 of the present invention.

[0072] FIG13 is a schematic diagram of the overall structure of the baby carriage of the present invention.

[0073] FIG14 is a schematic structural diagram of the insertion beam and the wheel seat of the present invention.

[0074] 15 is a cross-sectional view of the insert beam and the wheel seat of the present invention.

[0075] FIG16 is a cross-sectional view of the length locking mechanism in Example 4 of the present invention.

[0076] 17 is a cross-sectional view of the upper and lower locking mechanisms and the length locking mechanism in Example 5 of the present invention.

[0077] 18 is a cross-sectional view of the length locking mechanism in Example 6 of the present invention.

[0078] FIG19 is a schematic diagram of the upper and lower locking mechanisms and the length locking mechanism in Example 5 of the present invention.

[0079] FIG20 is a schematic diagram of the length locking mechanism in Example 6 of the present invention.

[0080] FIG21 is a schematic diagram of the overall structure of the baby carriage of the present invention.

[0081] FIG22 is an exploded view of the structure of the sliding seat in Example 1.

[0082] Figure 23 is a transverse cross-sectional view of the sliding seat of Example 1.

[0083] Figure 24 is a longitudinal sectional view of the sliding seat of Example 1.

[0084] FIG25 is an enlarged view of point A in FIG4 .

[0085] FIG26 is an enlarged view of point B in FIG3 .

[0086] Figure 27 is a structural schematic diagram of the sliding seat in Example 2.

[0087] Figure 28 is a structural diagram of the sliding seat in Example 3.

[0088] Figure 29 is a structural diagram of the sliding seat in Example 4.

[0089] FIG30 is a schematic diagram of the overall structure of the present invention.

[0090] Figure 31 is a schematic structural diagram of the seat and frame of the present invention.

[0091] FIG32 is a schematic structural diagram of the seat of the present invention.

[0092] FIG33 is a schematic structural diagram of the base of the present invention.

[0093] FIG34 is a schematic structural diagram of the seat body of the present invention.

[0094] FIG35 is a vertical cross-sectional view of the base of the present invention.

[0095] FIG36 is a schematic structural diagram of a locking mechanism of the present invention.

[0096] FIG37 is a schematic structural diagram of the locking mechanism 2 of the present invention.

[0097] FIG38 is a schematic structural diagram of the locking mechanism three of the present invention.

[0098] FIG39 is a schematic diagram of the overall structure of Example 14.

[0099] Figure 40 is a schematic diagram of the installation of the base and frame of Example 14.

[0100] Figure 41 is a cross-sectional view of Example 14 before the seat is lifted.

[0101] Figure 42 is a cross-sectional view of Example 14 after the seat is lifted.

[0102] Figure 43 is a partial enlarged sectional view of Example 14 before the seat is lifted.

[0103] Figure 44 is a partially enlarged cross-sectional view of Example 14 after the seat is lifted.

[0104] Figure 45 is a structural diagram of the keyhole of Example 14.

[0105] Figure 46 is a schematic diagram of the limiting mechanism of Example 14.

[0106] Figure 47 is a schematic diagram of another embodiment of the limiting mechanism of Example 14.

[0107] Figure 48 is a cross-sectional view of another embodiment of the limiting mechanism of Example 14.

[0108] In the figure, 1, front wheel; 2, rear wheel; 3, seat; 4, wheel seat; 5, frame; 6, insert beam; 7, button 1; 8, lock hole; 9, lock block; 10, limit block; 11, return spring 1; 12, button 2; 13, push block; 14, latch; 15, clamping hole; 16, return spring 2; 17, guide groove; 18, guide rod; 19, slideway; 30, button 3; 31, positioning hole; 32, positioning column; 33, elastic member 1; 34, positioning block; 35, inclined guide groove; 36, positioning column; 37, positioning column; 38, positioning column; 39, positioning column; 40, positioning column; 41, positioning column; 42, positioning column; 43, positioning column; 44, positioning column; 45, inclined guide groove; 46, positioning column; 47, positioning column; 48, positioning column; 49, positioning column; 50, positioning column; 51, positioning column; 52, positioning column; 53, positioning column; 54, positioning column; 55, positioning column; 56, positioning column; 57, positioning column; 58, positioning column; 59, positioning column; 60, positioning column; 61, positioning column; 62, positioning column; 63, positioning column; 64, positioning column; 65, positioning column; 66, positioning column; 67, positioning column; 68, positioning column; 69, positioning column; 70, positioning column; 71, positioning column; 72, positioning column; 73, positioning column; 74, positioning column; 75, positioning column; 76, positioning column; 77, positioning column; 78, positioning column; 79, positioning column; 80, positioning column; 81, positioning column; 82, positioning column; 83 6. Guide post; 37. Boss; 40. Button 4; 41. Mounting hole; 42. Mounting post; 43. Elastic member 2; 44. Mounting block; 45. Oblique slot; 46. Guide block; 47. Boss; 701. Button 5; 801. Lock hole 2; 901. Lock block 3; 1001. Limit block 2; 1101. Base; 1201. Button 6; 1301. Push block 2; 14. Push rod; 1501. Lock hole 2; 1601. Return spring 3; 1701. Guide slot 2; 18 01, guide rod 2; 3001, button 7; 3101, positioning hole 2; 3201, positioning column 2; 3301, elastic member 3; 3401, positioning block 2; 3501, inclined guide groove 2; 3601, guide column 2; 3701, protruding column 2; 41, limiting hole; 42, limiting column; 4301, elastic member 4; 502, sliding adjustment groove; 602, sliding seat; 702, anti-unhooking structure; 802, plug-in connection; 902, blocking member; 1002, retaining edge; 110 2. First blocking portion; 1203. Second blocking portion; 1303. Block; 1403. Extension section; 1502. Support seat; 1602. Front rotating frame; 1702. Front wheel rotating assembly; 1802. Avoidance groove; 1902. Gear hole; 2002. Slideway; 2102. Button 8; 2202. Push block 3; 2302. Latch 2; 2402. Pin hole; 2602. Car beam; 2702. Seat adjustment lever; 2802. Connecting piece; 03. Rear fork assembly; 503, handlebar assembly; 703, front fork; 803, rear push rod; 903, base; 1003, seat cushion; 1103, backrest; 1203, slideway 2; 1303, seat body; 1403, connecting seat; 1503, slideway 2; 1603, slider; 1703, button 9; 1803, lock block 1; 1903, pin 1; 2003, guide groove; 2103, guide groove 1; 2203, guide block; 2303, rotating shaft; 2403, button 10; 2503, lock block 2; 2 603, lock hole three; 2703, guide slot three; 2803, pin two; 2903, return spring four; 3003, slide rail; 3103, button eleven; 3203, lock block four; 3303, pin three; 3403, lock hole four; 35, guide slot four; 3603, return spring five; 404, base; 504, lock block; 604, button one; 704, lock hole; 804, push rod; 1004, frame; 1104, button two; 1204, push block; 1304, return spring two;1404, limit pin; 1504, limit slot; 1604, button three; 1704, storage spring; 1804, guide post; 1904, limit block; 2004, latch hole; 3004, button four; 3104, positioning hole; 3204, positioning post; 3304, elastic member; 3404, positioning block; 3504, oblique guide slot; 3604, guide post; 3704, boss. Best Mode for Carrying Out the Invention Example 1

[0109] As shown in Figure 1, the adjustable baby carriage described in the present invention includes a frame 5, a seat 3, a front wheel 1 arranged at the front end of the frame 5, and a rear wheel 2 arranged at the rear end of the frame 5. The rear wheel 2 is arranged on the frame 5 through a wheel seat 4, and the rear wheel 2 is rotatably set on the wheel seat 4. It is characterized in that an insertion beam 6 is provided at the rear end of the frame 5, and the insertion beam 6 is inserted into the wheel seat 4. A length adjustment mechanism is provided between the wheel seat 4 and the insertion beam 6 to adjust the insertion depth of the insertion beam 6.

[0110] As shown in Figures 2 to 4, the length adjustment mechanism includes a socket provided on the wheel seat 4, into which the insert beam 6 is inserted and moves back and forth along the socket. The cross-sectional shape of the socket matches the cross-sectional shape of the insert beam 6. A guide slot 17 is provided at the rear end of the insert beam 6, extending along the length of the insert beam 6. A guide rod 18 is fixedly mounted within the wheel seat 4. When the rear end of the insert beam 6 extends into the slot, the guide rod 18 correspondingly inserts into the guide slot 17. When the wheel seat 4 moves back and forth along the insert beam 6, the guide rod 18 moves synchronously along the guide slot 17. The guide rod 18 extends horizontally through the insert beam 6 and, in this embodiment, is coaxially arranged with the rear wheel 2.

[0111] The outer end of the guide groove 17 is open, and the guide rod 18 can be inserted into the guide groove 17 along the opening. An anti-unhooking device is also provided between the insertion beam 6 and the wheel seat 4 to prevent the insertion beam 6 from coming out of the wheel seat 4 and to prevent the guide rod 18 from coming out of the outer end opening of the guide groove 17.

[0112] As shown in FIG5 , a length locking mechanism is provided between the insertion slot and the insertion beam 6 to lock the relative position of the insertion beam 6 and the insertion slot. The length locking mechanism comprises a button 7 provided on the wheel base 4 and a locking hole 8 provided on the insertion beam 6. The locking holes 8 are spaced apart along the length of the insertion beam 6. The wheel base 4 has a mounting hole. The button 7 is slidably disposed within the mounting hole along the length of the insertion beam 6. The outer end of the button 7 extends out of the mounting hole. A locking block 9 is provided within the mounting hole. The inner end of the button 7 abuts against the locking block 9. The abutment surface between the button 7 and the locking block 9 is an inclined surface. A stopper 10 is fixed to the locking block 9 and extends into a slideway 19. When the button 7 is pressed, the button 7, via the inclined abutment surface, pushes the locking block 9 up and down, allowing the stopper 10 to exit the locking hole 15, unlocking the position. A return spring 11 is provided within the mounting hole to reset the locking block 9, allowing the stopper 10 to reenter the locking hole 15, locking the position.

[0113] As shown in Figures 6 and 7, the seat 3 is slidably arranged on the frame 5 along the length direction of the frame 5. A front and rear limiting mechanism is also provided between the seat 3 and the frame 5 for locking the relative position of the seat 3 and the frame 5. As shown in Figure 8, the front and rear limit mechanisms include a button 2 12 provided on the seat 3 and a card hole 15 provided on the frame 5. Several card holes 15 are arranged at intervals along the length direction of the frame 5. A slide groove is provided on the seat 3. Button 2 12 is slidably provided in the slide groove along the length direction of the slider. The outer end of button 2 12 extends out of the slide groove. A push block 13 is also provided in the slide groove. The inner end of button 2 12 is against the push block 13. The abutment surface between button 2 12 and the push block 13 is an inclined surface. A latch 14 is fixed on the push block 13. When button 2 12 is pressed, button 2 12 pushes the push block 13 up and down through the inclined abutment surface, so that the latch 14 exits the card hole 15 to form unlocking. A reset spring 2 16 is also provided in the slide groove to push the push block 13 to reset, so that the latch 14 is inserted into the card hole 15 to form locking.

[0114] The regulation method of the present invention is as follows:

[0115] Adjustment of the front and rear position of the rear wheel 2: By pressing button 17, the limit block 10 is withdrawn from the lock hole 8 to unlock, pushing the rear wheel 2 and the wheel seat 4, so that the rear wheel 2 and the wheel seat 4 are translated as a whole. When the limit block 10 moves to the position corresponding to the other lock hole 8, release button 7, and the return spring 11 is used to push the lock block 9 to return to its original position. The limit block 10 is inserted into the lock hole 8 to lock, thereby completing the front and rear position adjustment of the rear wheel 2.

[0116] Adjustment of the front and rear position of the seat 3: By pressing button 2 12, the latch 14 is withdrawn from the card hole 15 to form an unlocking, pushing the seat 3 to move horizontally. When the latch 14 moves to a position corresponding to another card hole 15, release button 2 12, and the return spring 2 16 is used to push the push block 13 to reset, and the latch 14 is inserted into the card hole 15 to form a locking, thereby completing the front and rear position adjustment of the seat 3.

[0117] Example 2

[0118] As shown in Figures 9 and 10, different from Example 1, the length locking mechanism described in this embodiment includes a button four 40 movably set on the wheel seat 4, a mounting hole 41 opened on the wheel seat 4, and a mounting column 42 movably set on the insertion beam 6. Several mounting holes 41 are arranged at intervals along the length direction of the insertion beam 6. When the wheel seat 4 moves back and forth along the insertion beam 6, the mounting columns 42 can correspond to each mounting hole 41 one by one. An elastic member 2 43 is further provided in the insertion beam 6 for driving the mounting columns 42 to insert into the mounting holes 41 to form a lock; the button four 40 is slidably set on the wheel seat 4 along the length direction of the insertion beam 6, and the button four 40 is opened. A sliding cavity is provided, within which a mounting block 44 is movably mounted. The button 40 is provided with a plurality of oblique slots 45. The mounting block 44 is fixedly provided with a plurality of guide blocks 46 corresponding to each of the oblique slots 45. The guide blocks 46 are inserted into the oblique slots 45, and the mounting block 44 is raised and lowered relative to the button 40 along the oblique slots 45 via the guide blocks 46. The bottom of the mounting block 44 is fixedly provided with a plurality of protrusions 47 corresponding to the positions of the mounting holes 41. Pressing the button 40 pushes the mounting block 44 downward, causing the protrusions 47 to extend into the mounting holes 41 and withdraw the mounting post 42 from the mounting holes 41, thereby unlocking the mounting hole 41. The guide slot 17 is a closed, waist-shaped slot, into which the guide rod 18 is inserted axially. No additional anti-unhooking device is required; the guide slot 17 itself can also prevent unhooking. In this embodiment, the rear end of the insertion beam 6 is fixedly provided with an extension piece, and a guide groove 17 is provided on the extension piece. The guide groove 17 extends along the length direction of the insertion beam 6. A guide rod 18 is fixedly provided in the wheel seat 4. When the rear end of the insertion beam 6 extends into the slide groove, the guide rod 18 is correspondingly inserted into the guide groove 17. When the wheel seat 4 moves back and forth along the insertion beam 6, the guide rod 18 moves synchronously along the guide groove 17; the guide rod 18 horizontally passes through the extension piece.

[0119] Example 3

[0120] As shown in Figures 11 and 12, different from Example 1, the front and rear limit mechanism described in this embodiment includes a button 3 30 movably set on the seat 3, a positioning hole 31 opened on the seat 3, and a positioning column 32 movably set on the frame 5. Several positioning holes 31 are arranged at intervals along the length direction of the frame 5. When the seat 3 moves forward and backward along the frame 5, the positioning columns 32 can correspond to each positioning hole 31 one by one. An elastic member 33 is also provided in the frame 5 for driving the positioning columns 32 to insert into the positioning holes 31 to form a lock; the button 3 30 is slidably set on the seat 3 along the length direction of the frame 5, and the button 3 30 is opened. A sliding cavity, in which a positioning block 34 is movably provided. The button three 30 is provided with a plurality of oblique guide grooves 35. The positioning block 34 is fixed with a plurality of guide posts 36 corresponding to the oblique guide grooves 35. The guide posts 36 are inserted into the oblique guide grooves 35. The positioning block 34 is raised and lowered relative to the button three 30 along the oblique guide grooves 35 through the guide posts 36. The bottom of the positioning block 34 is fixed with a plurality of protrusions 37 corresponding to the positions of the positioning holes 31. When the button three 30 is pressed, the button three 30 pushes the positioning block 34 down so that the protrusions 37 extend into the positioning holes 31 and the positioning posts 32 withdraw from the positioning holes 31 to form unlocking.

[0121] Example 4

[0122] As shown in Figure 13, the adjustable baby carriage described in the present invention includes a frame 5, a seat 3, a front wheel 1 arranged at the front end of the frame 5, and a rear wheel 2 arranged at the rear end of the frame 5. The rear wheel 2 is set on the frame 5 through a wheel seat 4, the rear wheel 2 is rotatably set on the wheel seat 4, and the seat 3 is fixed on the wheel seat 4.

[0123] As shown in Figures 14 and 15 , the rear end of the vehicle frame 5 is provided with an insert beam 6, which is inserted into the wheel seat 4. A length adjustment mechanism is provided between the wheel seat 4 and the insert beam 6 to adjust the insertion depth of the insert beam 6. The length adjustment mechanism includes a socket provided on the wheel seat 4, into which the insert beam 6 is inserted and moves back and forth. The cross-sectional shape of the socket matches that of the insert beam 6. The upper end of the socket is open, and the lower end is closed. An anti-unhooking device is also provided between the insert beam 6 and the wheel seat 4 to prevent the insert beam 6 from falling out of the socket in the wheel seat 4.

[0124] As shown in Figure 16 , a length locking mechanism is provided between the insertion slot and the insertion beam 6 , locking the relative position of the insertion beam 6 and the insertion slot. The length locking mechanism comprises a limiting hole 41 formed in the wheel base 4 and a limiting post 42 movably mounted on the insertion beam 6 . Several limiting holes 41 are spaced apart along the insertion direction of the insertion beam 6 . As the insertion beam 6 moves forward and backward along the wheel base 4 , the limiting posts 42 align with each limiting hole 41 . A fourth elastic member 4301 is also provided within the vehicle frame 5 to drive the limiting posts 42 into the limiting holes 41, locking the position. To adjust the position, a finger presses the limiting post 42 to release it from the limiting hole 41, unlocking the position.

[0125] As shown in Figure 17, a base 1101 is fixed on the wheel seat 4, the seat 3 is set on the base 1101 and can be raised and lowered relative to the base 1101. A locking mechanism is also provided between the seat 3 and the base 1101 for locking the relative position of the seat 3 and the base 1101. The locking mechanism includes a button five 701 movably arranged on the base 1101, a lock hole two 801 opened on the base 1101, and a lock block three 901 arranged on the seat 3. Several lock holes two 801 are arranged at intervals along the moving direction of the seat 3. When the seat 3 is raised or lowered relative to the base 1101, the lock blocks three 901 can correspond one-to-one with each lock hole two 801. The button five 701 is fixed with several push rods 14 corresponding one-to-one to the position of each lock hole two 801; the lock block three 901 is arranged to slide horizontally on the seat 3, and a return spring is further provided in the seat 3 for pushing the lock block three 901 to move horizontally so that the lock block three 901 is inserted into the lock hole two 801 to form a lock. The button five 701 is arranged to slide horizontally on the base 1101, and the sliding direction of the button five 701 is consistent with the sliding direction of the lock block three 901. Pressing the button five 701 causes each push rod 14 to insert into the lock hole two 801 and push the lock block three 901 out of the lock hole two 801 to form an unlocking.

[0126] A guide rod 2 1801 is fixedly provided at the bottom of the seat 3, and a guide channel is provided on the base 1101. The guide rod 2 1801 is inserted into the guide channel and rises and falls along the guide channel; a long guide groove 2 1701 is provided on the frame 5, and the guide rod 2 1801 is inserted into the long guide groove 2 1701. When the seat 3 moves forward and backward relative to the frame 5, the guide rod 2 1801 moves back and forth synchronously along the long guide groove 2 1701.

[0127] Example 5

[0128] As shown in Figures 17 and 19, different from Example 4, the length locking mechanism described in this embodiment includes a button six 1201 and a push block two 1301. A plurality of second card holes 1501 are provided on the frame 5. The plurality of second card holes 1501 are arranged at intervals along the length direction of the frame 5. A slide groove is provided on the base 1101. The button six 1201 is slidably arranged in the slide groove along the length direction of the slider. The outer end of the button six 1201 extends out of the slide groove, and the inner end of the button six 1201 abuts against the push block two 1301. The abutment surface between button six 1201 and push block two 1301 is an inclined surface. A limit block two 1001 is fixed on the push block two 1301. When button six 1201 is pressed, button six 1201 pushes the push block two 1301 up and down through the inclined abutment surface, so that the limit block two 1001 exits the outside of the card hole two 1501 to form unlocking. A reset spring three 1601 is also provided in the slide groove to push the push block two 1301 to reset, so that the limit block two 1001 is inserted into the card hole two 1501 to form locking.

[0129] Example 6

[0130] As shown in Figures 18 and 20, different from Example 4, the length locking mechanism described in this embodiment includes a button seven 3001 movably set on the base 1101, a positioning hole two 3101 opened on the base 1101, and a positioning column two 3201 movably set on the frame 5. Several positioning holes two 3101 are arranged at intervals along the length direction of the frame 5. When the base 1101 moves back and forth along the frame 5, the positioning columns two 3201 can correspond to each positioning hole two 3101 one by one. An elastic member three 3301 is further provided in the frame 5 for driving the positioning columns two 3201 to insert into the positioning holes two 3101 to form a lock; the button seven 3001 is slidably set on the base 1101 along the length direction of the frame 5, and a sliding cavity is opened on the button seven 3001. A positioning block 2 3401 is movably provided, and a plurality of inclined guide grooves 2 3501 are opened on the button 7 3001. A plurality of guide posts 2 3601 corresponding to the inclined guide grooves 2 3501 are fixed on the positioning block 2 3401. The guide posts 2 3601 are inserted into the inclined guide grooves 2 3501, and the positioning block 2 3401 is raised and lowered relative to the button 7 3001 along the inclined guide grooves 2 3501 through the guide posts 2 3601; a plurality of protruding posts 2 3701 corresponding to the positions of the positioning holes 2 3101 are fixed at the bottom of the positioning block 2 3401. When the button 7 3001 is pressed, the button 7 3001 pushes the positioning block 2 3401 down, so that the protruding posts 2 3701 extend into the positioning holes 2 3101 and the positioning posts 2 3201 are withdrawn from the positioning holes 2 3101 to form unlocking.

[0131] Example 7

[0132] Different from the fourth embodiment, an adjustment rod is fixedly provided on the base 1101 of the present embodiment, and an adjustment channel is provided at the bottom of the seat 3. The adjustment rod is inserted into the adjustment channel and rises and falls along the adjustment channel.

[0133] Example 8

[0134] As shown in Figures 21-26, a child stroller with an adjustable seat 3 includes a frame 5, a seat 3, a front wheel 1 disposed at the front end of the frame 5, and a rear wheel 2 disposed at the rear end of the frame 5. The frame 5 is provided with a sliding adjustment slot 502. A sliding seat 602 is fixedly provided at the bottom of the seat 3. The sliding seat 602 can be directly inserted into the notch of the sliding adjustment slot 502 and can be retained in the sliding adjustment slot 502 for reciprocating movement along the sliding adjustment slot 502. An anti-detachment structure 702 is provided between the sliding seat 602 and the sliding adjustment slot 502 to prevent the sliding seat 602 from being removed from the notch of the sliding adjustment slot 502. The seat 3 can be adjusted along the length of the beam 2602, allowing for adaptive adjustment for children of different heights. The anti-detachment structure 702 can securely secure the seat to the frame 5, preventing the seat from shaking after installation.

[0135] The sliding seat 602 includes a plug-in portion 802, and the anti-unhooking structure 702 includes a blocking member 902 and a rib 1002 disposed on the side of the notch of the sliding adjustment slot 502. The blocking member 902 is disposed within the sliding adjustment slot 502. The plug-in portion 802 is inserted into the sliding adjustment slot 502 and engages with the blocking member 902 in the insertion and extraction direction. The blocking member 902 is provided with a first blocking portion 1102, which is blocked by the rib 1002 on the corresponding side when the blocking member 902 is withdrawn from the sliding adjustment slot 502. The blocking member 902 also includes a second blocking portion 1203. At least one blocking block 1303 is disposed on the side of the plug-in portion 802. The second blocking portion 1203 blocks the movement path of the corresponding blocking block 1303 when it is withdrawn from the sliding adjustment slot 502. When the lower end face of the seat 3 rests against the frame 5, the distance between the upper end face of the block 1303 and the inner side face of the retaining edge 1002 matches the thickness of the blocking member 902. There are two groups of blocks 1303, one on either side of the insertion portion 802, and two groups of corresponding retaining edges 1002, one on either side of the notch of the sliding adjustment slot. The blocking member 902 is sheet-shaped and positioned between the block 1303 and the corresponding retaining edge 1002. One side of the block 1303 overlaps with the projection of the block 1303 in the insertion direction, and the other side overlaps with the projection of the retaining edge 1002 in the insertion direction of the sliding seat 602. The anti-unhooking structure 702 also includes a support seat 1502, which is disposed within the sliding adjustment slot 502 and supported by the bottom of the sliding seat 602. After the plug-in portion 802 is inserted into the sliding adjustment slot 502 , the first blocking portion 1102 and the second blocking portion 1203 on the blocking member 902 respectively abut between the retaining edge 1002 and the block 1303 , so that the block 1303 can only move along the length direction of the sliding adjustment slot 502 .

[0136] The front and rear ends of the seat 3 are provided with extension sections 1403 that exceed the plug-in portion 802. The extension sections 1403 are used to cover the sliding adjustment groove 502 when the seat 3 slides along the sliding adjustment groove 502. Covering the sliding adjustment groove 502 by the extension sections 1403 makes the seat 3 more beautiful.

[0137] The blocking member 902 is fixedly connected to the support base 1502 via the connecting piece 2802. The outline of the support base 1502 matches the cross-sectional shape of the sliding adjustment groove 502. Both the outline of the support base 1502 and the cross-sectional shape of the sliding adjustment groove 502 are elliptical or rugby-shaped.

[0138] The vehicle frame 5 includes a beam 2602, a front rotating frame 1602, and a front wheel rotating assembly 1702. The beam 2602 is hollow and communicates with the sliding adjustment slot 502. The front end opening is connected to the front rotating frame 1602. The front wheel rotating assembly 1702 is rotatably mounted on the front rotating frame 1602. The front wheel 1 is rotatably mounted on the front wheel rotating assembly 1702, and the rear wheel 2 is mounted on the beam 2602. The support seat 1502 can slide from the open end of the beam 2602 into the sliding adjustment slot 502. During installation, the plug-in portion 802 is inserted into the sliding adjustment slot 502, the support seat 1502 is inserted from one end of the beam 2602, and the blocking portion is inserted between the block 1303 and the rib 1002. An escape slot 1802 is provided on the blocking member or between the blocking member 902 and the sliding adjustment slot 502 for inserting the seat adjustment rod 2702 and for adjusting the seat 3 up, down, and forward or backward. The position of the seat 3 can be easily adjusted. The support seat 1502 or the retaining edge 1002 is provided with a plurality of gear holes 1902 at intervals, and the seat 3 is provided with a slide groove 2002, and a button eight 2102 and a push block three 2202 are provided in the slide groove 2002. The inner end of the button eight 2102 abuts against the push block three 2202, and the abutting surface between the two is an inclined surface. The outer end of the button eight 2102 extends from one end of the slide groove 2002, and a latch two 2302 is fixed on the push block three 2202. The side wall of the slide groove 2002 is provided with a pin hole 2402 communicating with the outside world, and a return spring is provided between the push block three 2202 and the inner wall of the slide groove 2002. Under the action of the return spring, the push block three 2202 always has a movement tendency to extend the latch two 2302 from the pin hole 2402. The button eight 2102 can drive the push block three 2202 to overcome the action of the return spring and pull the latch two 2302 out of the corresponding gear hole 1902. The seat 3 can be locked and unlocked conveniently by driving the push block 3 2202 and the latch 2 2302 to move via the push button, and the adjustment is relatively convenient.

[0139] Example 9

[0140] The difference from Example 8 is that, as shown in FIG27 , there are two plug-in parts 802, arranged in parallel, and each having a block 1303 on the same side of the lower end. The outer block 1303 is blocked by the retaining edge 1002 on the corresponding side of the notch of the sliding adjustment slot 502, while the other block 1303 located between the two plug-in parts 802 is blocked by the second blocking portion 1203 of the blocking member 902. One of the blocks 1303 is blocked by the retaining edge 1002 on one side, and the other block 1303 is blocked by the second blocking portion 1203 on the blocking member 902.

[0141] Example 10

[0142] The difference from Example 8 is that, as shown in FIG28 , the inserting portion 802 is fixedly connected to the blocking member 902. This connection can be made directly or via fasteners, such as pins, rivets, or screws. Directly connecting the inserting portion 802 and the blocking member 902 via fasteners simplifies the structure and facilitates installation.

[0143] Example 11

[0144] The difference from Example 8 is that, as shown in Figure 29, which is a schematic diagram of a transverse section at the vehicle beam 2602, there are two plug-in parts 802, which are arranged in parallel, and a blocking block 1303 is provided on the inner side surfaces facing each other of the two plug-in parts 802. The blocking member 902 is provided with two second blocking parts 1203 corresponding to the two above-mentioned blocking blocks 1303. The blocking block 1303 is blocked by the corresponding second blocking part 1203 when it is pulled out of the sliding adjustment groove 502. When the vehicle beam 2602 is longitudinally cut along the length direction, the two ends of the sliding adjustment groove 502 are provided with a blocking edge 1002.

[0145] Example 12

[0146] The difference from Example 8 is that the sliding seat 602 includes a plug-in portion 802, and the anti-unhooking structure 702 includes a blocking member 902 and a second blocking portion 1203 opened on the blocking member 902. At least one blocking block 1303 is provided on the side of the above-mentioned plug-in portion 802, and the second blocking portion 1203 blocks the movement path of the corresponding blocking block 1303 when it is pulled out of the sliding adjustment groove 502. The blocking member 902 is fixedly set in the above-mentioned sliding adjustment groove 502. During installation, the blocking member 902 is directly fixed in the sliding adjustment groove 502, and the plug-in portion 802 is installed on the anti-unhooking structure 702 to complete the installation.

[0147] Example 13

[0148] As shown in Figure 30, a children's car with a multi-directional adjustment function includes a frame 5, a front fork 703, a rear fork assembly 203, a front wheel 1, two rear wheels 2, a handle assembly 503 and a seat 3. The front fork 703 is connected to the frame 5, with the lower end connected to the front wheel 1 and the upper end connected to the handle assembly 503. The seat 3 and the rear fork assembly 203 are connected to the frame 5. The above-mentioned rear wheel 2 is rotatably connected to the rear fork assembly 203. A rear push rod 803 is also inserted into the rear end of the frame 5. A base 903 is provided on the frame 5. The seat 3 is movably arranged on the base 903. The seat 3 includes a seat cushion 1003 and a backrest 1103. The seat 3 is also provided with a safety belt or guardrail.

[0149] As shown in Figures 31-33, the base 903 is provided with multiple plug-in gears from top to bottom, and a slide 2 1203 is provided on the bottom surface of the seat 3. The slide 2 1203 is open at least at one end, through which it can be plugged in with the base 903. A sliding matching structure is provided between the slide 2 1203 and the above-mentioned plug-in gears. The slide 2 1203 of the above-mentioned seat 3 can be plugged in with each plug-in gear to adjust the height of the seat 3. A reversing mechanism for turning the seat 3 is also provided between the seat 3 and the base 903.

[0150] As shown in Figure 33, the base 903 includes a seat body 1303 and a connecting seat 1403. The seat body 1303 is set on the frame 5, and the connecting seat 1403 is set on the seat body 1303. A plurality of slide grooves 1503 are arranged in parallel on both sides of the connecting seat 1403 from top to bottom, and a plurality of sliders 1603 are arranged at intervals on the two inner walls of the slideway 1203 of the above-mentioned seat 3. Each slider 1603 can be slidably plugged into the corresponding slide groove 1503.

[0151] In addition to this embodiment, the second chute 1503 and the slider 1603 can also be arranged in a mirrored manner, with the slider 1603 arranged on the connecting seat 1403 and the second chute 1503 opened on the inner wall of the second chute 1203. In addition, the number of sliders 1603 does not need to correspond one-to-one with the number of second chute 1503. The number of sliders 1603 on a single side can also be less than the number of second chute 1503 on the corresponding side. For example, one slider 1603 on a single side can correspond to multiple second chute 1503 on the same side. When the slider 1603 slidably cooperates with different second chute 1503 on the same side, the height of the seat 3 can also be adjusted.

[0152] In this embodiment, as shown in FIG33 , the ends of the second chute 1503 extend to the front and rear ends of the connecting seat 1403. When adjusting the height of the seat 3, the seat 3 must be fully withdrawn. Alternatively, the second chute 1503 can be shortened. When the slider 1603 slides out of the second chute 1503 but remains within the connecting seat 1403, the seat 3 can be adjusted by directly lifting or pressing it upwards or downwards. The slider 1603 will not be restricted by the second chute 1503.

[0153] Since the height of the seat 3 can be adjusted relative to the base 903, a locking mechanism is required to unlock the seat 3 when the height adjustment is required and lock it after the adjustment is completed. As shown in Figure 36, the locking mechanism includes a button 9 1703 and a locking block 1803. The locking block 1803 is fixed with a pin 1903. The pin 1903 is arranged horizontally. The inner wall of the slide 2 1203 of the seat 3 is provided with a plurality of horizontal lock holes 1 corresponding to each gear plug-in gear. When the seat 3 is matched with different plug-in gears, the pin 1903 can be aligned with the corresponding lock hole 1 and plugged in. A guide groove 2103 is provided on the base 903. The button 9 1703 and the locking block 1803 are arranged in the guide groove 2103. The outer end of button nine 1703 is exposed, and the inner end of button nine 1703 abuts against locking block one 1803. The abutting surface between button nine 1703 and locking block one 1803 is an inclined surface. When button nine 1703 is pressed inward, button nine 1703 pushes locking block one 1803 to move horizontally along the length direction of pin one 1903 through the inclined abutting surface, so that pin one 1903 exits lock hole one to form unlocking. A reset spring one is also provided in the guide groove one 2103 for pushing lock block one 1803 to reset, so that pin one 1903 is inserted into lock hole one to form locking.

[0154] Since the stroller is provided with a rear push rod 803, it can be pushed by the parents as a stroller. Sometimes, the seat 3 needs to be reversed 180 degrees so that the child faces the parents at the rear. In this case, the reversing mechanism is required to achieve the reversing.

[0155] As shown in Figures 34, 35, and 37, the reversing mechanism includes a rotating shaft 2303 disposed on the connecting base 1403 and a second locking mechanism. The connecting base 1403 is rotatably mounted on the base body 1303 via the rotating shaft 2303 and is locked and unlocked via the second locking mechanism. Two arcuate guide grooves 2003 are defined on the upper end surface of the base body 1303. The two guide grooves 2003 are symmetrically arranged around the rotating shaft 2303. The bottom of the connecting base 1403 is provided with two guide blocks 2203 that correspond to and fit within the two guide grooves 2003. When the connecting base 1403 rotates relative to the base body 1303, the guide blocks 2203 move along the guide grooves 2003.

[0156] The locking mechanism 2 includes a button 10 2403 and a locking block 2503. The locking block 2503 is fixed with a pin 2803. Two locking holes 3 2603 are provided on the top of the seat body 1303. A guide groove 3 2703 is provided on the connecting seat 1403. The button 10 2403 and the locking block 2 2503 are arranged in the guide groove 3 2703. The outer end of the button 10 2403 is exposed, and the inner end of the button 10 2403 is against the locking block 2503. The button 10 2403 and the locking block 2 The abutment surface between the second locking block 2503 is an inclined surface. When the button 10 2403 is pressed inward, the button 10 2403, via the inclined abutment surface, pushes the second locking block 2503 to move vertically along the length of the second pin 2803, causing the second pin 2803 to exit the third locking hole 2603, thereby unlocking the seat. A fourth return spring 2903 is also provided within the third guide groove 2703 to push the second locking block 2503 back to its original position, allowing the second pin 2803 to be inserted into the third locking hole 2603, thereby locking the seat. Since there are two third locking holes 2603, they are respectively provided for inserting and locking the second pin 2803 when the seat 3 is in different orientations.

[0157] In addition to the above-mentioned reversing method of rotating in place, reversing can also be achieved by inserting the seat 3 upside down. Since the slide 2 1203 can be plugged into each gear from the front or rear of the seat 3, the seat 3 is first completely separated from the base 903, then turned 180°, and finally the slider 1603 is inserted from the other end of the slide 2 1503 to achieve reversing of the seat 3.

[0158] This child stroller also has a forward and backward adjustment function for the seat 3. As shown in FIG31 , a slide rail 3003 is provided on the top of the frame 5. The lower end of the seat 1303 is clamped on the slide rail 3003 to prevent it from falling off. The base 903 can reciprocate along the slide rail 3003. A locking mechanism 3 is provided between the base 903 and the slide rail 3003 to lock the base 903 in different positions on the slide rail 3003. As shown in FIG38 , the locking mechanism 3 includes a button 11 3103 and a locking block 4 3203. The locking block 4 3203 is fixedly provided with a pin 3303. A plurality of locking holes 4 3403 are provided on the frame 5 at intervals along the sliding direction of the base 903. A guide groove 4 3503 is provided on the base 903. The button 11 3103 and the locking block 4 3203 are disposed in the guide groove 4 3503. The outer end of the button 11 3103 is exposed, and the inner end of the button 11 3103 abuts against the locking block 4 3203. The abutment surface between button 1 3103 and locking block 4 3203 is an inclined surface. When button 11 3103 is pressed inward, button 11 3103 pushes locking block 4 3203 to move horizontally along the length direction of pin 3 3303 through the inclined abutment surface, so that pin 3 3303 exits the corresponding lock hole 4 3403 to form unlocking. A reset spring 5 3603 is also provided in the guide groove 4 3503 to push the locking block 4 3203 to reset, so that pin 3 3303 is inserted into the corresponding lock hole 4 3403 to form locking.

[0159] Another way to adjust the seat 3 forward and backward is to provide a through guide hole on the base 903, and the above-mentioned frame 5 fits through the guide hole. A locking mechanism three is provided between the base 903 and the frame 5, which is used to lock the base 903 and maintain it in different positions on the frame 5. The locking mechanism three can be the same as the above-mentioned embodiment.

[0160] The regulation method of the present invention is as follows:

[0161] Adjusting the height of seat 3: By pressing button nine 1703, pin one 1903 is withdrawn from lock hole one to unlock the seat 3, and the slider 1603 slides along slide groove two 1503 until the seat 3 is completely separated from the base 903. Next, move the seat 3 up and down to adjust to the appropriate gear height, so that the corresponding slider 1603 and slide groove two 1503 correspond, and then push the seat 3 again to make the slider 1603 slide into the new corresponding slide groove two 1503. After pushing into place, release button nine 1703, and the reset spring one pushes the lock block one 1803 to reset, so that the pin one 1903 is inserted into the corresponding lock hole one to lock the seat 3, thereby completing the height adjustment of seat 3.

[0162] Method 1 for reversing the seat 3: First, unlock it by pressing button 9 1703, then separate the entire seat 3 from the base 903. Next, rotate the seat 3, reattach the slide 1203 of the seat 3 to the connector 1403, and snap the slider 1603 into the corresponding slide groove 1503. This structure can be reversed in a variety of ways. If the slide 1203 is fully connected, it can be re-inserted from the end of the connector 1403 that was removed, or from the other end of the connector 1403. If the slide 1203 is only fully connected at one end, it needs to be re-inserted from the other end of the connector 1403 after reversing.

[0163] Second method of reversing and adjusting seat 3: Unlock by pressing button 10 2403, separate the connecting seat 1403 and the seat body 1303, then rotate the seat 3 and the connecting seat 1403 so that their linkage rotates 180° relative to the seat body 1303, then release button 10 2403, insert pin 2 2803 back into the other lock hole 3 2603, and the reversing of seat 3 is completed.

[0164] Adjustment of the front and rear position of the seat 3: By pressing the button eleven 3103, the pin three 3303 is withdrawn from the lock hole four 3403 to unlock the seat 3 and the base 903, and the seat 3 and the base 903 are translated as a whole. When the pin three 3303 moves to a position corresponding to the other lock hole four 3403, the button eleven 3103 is released, and the reset spring five 3603 is used to push the lock block four 3203 to reset, and the pin three 3303 is inserted into the lock hole four 3403 to lock the seat 3, thereby completing the front and rear position adjustment of the seat 3.

[0165] Example 14

[0166] The vehicle body length adjustment structure of this embodiment can be the same as that of embodiment 1. On the basis of embodiment 1, an elastic force storage function of the seat 3 is added. As shown in Figures 39 to 44, the present invention provides a child stroller with a seat that can be raised and lowered by elastic force storage, comprising a frame 13, a seat 3, a front wheel 1 disposed at the front end of the frame 13, and a rear wheel 2 disposed at the rear end of the frame 13. The frame 13 is provided with a base 404, and the seat 3 is disposed on the base 404 and can be raised and lowered relative to the base 404. A locking mechanism is further provided between the seat 3 and the base 404 for locking the relative position of the seat 3 and the base 404. The invention is characterized in that a force storage structure is further provided between the seat 3 and the base 404. When the locking mechanism controls the position of the seat 3 to be unlocked, the force storage structure is used to push the seat 3 to rise.

[0167] The locking mechanism includes a button 604 movably arranged on the base 404, a lock hole 704 opened on the base 404, and a lock block 504 arranged on the seat 3. Several lock holes 704 are arranged at intervals along the moving direction of the seat 3. When the seat 3 is raised or lowered relative to the base 404, the lock blocks 504 can correspond one-to-one with each lock hole 704. The button 604 is fixed with several push rods 804 corresponding one-to-one to the position of each lock hole 704; the lock block 504 is arranged to slide horizontally on the seat 3, and a return spring is further provided in the seat 3 for pushing the lock block 504 to move horizontally so that the lock block 504 is inserted into the lock hole 704 to form a lock. The button 604 is arranged to slide horizontally on the base 404, and the sliding direction of the button 604 is consistent with the sliding direction of the lock block 504. Pressing the button 604 causes each push rod 804 to insert into the lock hole 704 and push the lock block 504 out of the lock hole 704 to form an unlocking.

[0168] At least one locking hole 704 is shaped like a waist-shaped hole, and the other locking holes 704 are shaped like round holes. The shape of the locking block 504 is adapted to the shape of the round hole. When the locking block 504 is located in the waist-shaped hole, the seat 3 can move back and forth along the waist-shaped hole through the locking block 504. In conjunction with the design of the force storage spring 1704, the seat 3 can be raised and lowered slightly along the waist-shaped hole through the locking block 504, which has a shock-absorbing effect when riding. As shown in Figure 45, there are two locking holes 704 in this embodiment. The upper locking hole 704 is a waist-shaped hole, and the lower locking hole 704 is a round hole. When the seat 3 is lifted, the locking block 504 is located in the upper waist-shaped hole, which has a shock-absorbing effect.

[0169] The base 404 is slidably mounted on the frame 13 along the length direction of the frame 13. A limiting mechanism is further provided between the frame 13 and the base 404 for locking the position of the base 404 and the frame 13. As shown in Figures 40 and 46, the limiting mechanism includes a second button 1104 and a push block 1204. The frame 13 is provided with a plurality of latch holes 2004, which are spaced apart along the length direction of the frame 13. The base 404 is provided with a slide groove, in which the second button 1104 is slidably mounted along the length direction of the slider. The outer end of the second button 1104 extends out of the slide groove, and the inner end of the second button 1104 abuts against the push block 1204. 04 and the push block 1204 has an inclined surface. A limit block 1904 is fixed on the push block 1204. Press button 2 1104. Button 2 1104 pushes the push block 1204 up and down through the inclined abutment surface, so that the limit block 1904 exits the card hole 2004 to form unlocking. A reset spring 2 1304 is also provided in the slide groove to push the push block 1204 to reset, so that the limit block 1904 is inserted into the card hole 2004 to form locking.

[0170] An anti-slip device is also provided between the seat 3 and the base 404. When the locking mechanism controls the position of the seat 3 to be unlocked, the force storage structure pushes the seat 3 to lift. The anti-slip device is used to limit the lifting height of the seat 3 to prevent the seat 3 from completely falling off the base 404.

[0171] The anti-slip device includes a limit pin 1404 arranged on the seat 3, and a limit groove 1504 is provided on the base 404. The limit groove 1504 extends along the moving direction of the seat 3, and one end of the limit pin 1404 extends into the limit groove 1504. When the locking block 504 exits the lock hole 704, the force storage structure pushes the seat 3 to lift, and the limit pin 1404 slides synchronously along the limit groove 1504. When the limit pin 1404 slides to against the top surface of the limit groove 1504, the seat 3 stops lifting, and the locking block 504 is correspondingly inserted into the lock hole 704 above.

[0172] The base 404 is also provided with an unlocking device, which allows the seat 3 to be completely removed from the base 404, facilitating removal and installation of the seat 3. The unlocking device includes a button 3 1604 , and a stop pin 1404 is laterally slidably mounted on the seat 3. The button 3 1604 is laterally slidably mounted on the base 404, and the sliding direction of the button 3 aligns with the sliding direction of the lock block 504. When the button 3 1604 is pressed, the inner end of the button 3 1604 extends into the stop slot 1504 and pushes the stop pin 1404 out of the stop slot 1504, thereby unlocking the seat 3. A return spring 3 is also provided within the seat 3 for translating the stop pin 1404, allowing it to retract into the stop slot 1504.

[0173] As shown in Figures 41 and 42, a force storage structure is provided between the seat 3 and the base 404. When the locking block 504 exits the locking hole 704, the force storage structure is used to propel the seat 3 upward. The force storage structure includes a force storage spring 1704. The base 404 has a mounting hole. A guide post 1804 is fixed to the seat 3 and inserted into the mounting hole. The force storage spring 1704 is embedded in the mounting hole. The bottom end of the guide post 1804 presses against the force storage spring 1704. When the seat 3 is raised or lowered relative to the base 404, the guide post 1804 compresses the force storage spring 1704 along the mounting hole, causing the seat 3 to rise or fall synchronously.

[0174] Button 1 604 is also provided with an anti-accidental touch device. The anti-accidental touch device includes a tension spring, the two ends of which are hooked between button 1 604 and base 404. Before pressing button 1 604, the tension spring must be separated from button 1 604. Otherwise, button 1 604 cannot be pressed. This prevents children from accidentally touching button 1 604 and accidentally injuring the child when the force storage spring 1704 pushes the seat 3 to automatically rise.

[0175] The regulation method of the present invention is as follows:

[0176] Height adjustment of seat 3: Press button 1 604 to extend each push rod 804 into the corresponding lock hole 704 and push the lock block 504 out of the lock hole 704 to unlock it. The storage spring 1704 pushes the seat 3 to lift, and the limit pin 1404 slides synchronously along the limit groove 1504. When the limit pin 1404 slides to abut against the top surface of the limit groove 1504, the seat 3 stops lifting, and the return spring pushes the lock block 504 to translate, so that the lock block 504 is inserted into the upper lock hole 704 to lock it, thereby completing the height adjustment of seat 3;

[0177] Adjustment of the front and rear position of seat 3: By pressing button 2 1104, the limit block 1904 is withdrawn from the card hole 2004 to form an unlocking, pushing the seat 3, and the seat 3 and the base 404 are translated as a whole. When the limit block 1904 moves to a position corresponding to another card hole 2004, release button 2 1104, and the return spring 2 1304 is used to push the push block 1204 to reset, and the limit block 1904 is inserted into the card hole 2004 to form a locking, thereby completing the front and rear position adjustment of seat 3.

[0178] Example 15

[0179] As shown in Figures 47 and 48, different from Example 1, the limiting mechanism described in this embodiment includes a button four 3004 placed on the base 404, a positioning hole 3104 opened on the base 404, and a positioning column 3204 movably set on the frame 13. The plurality of positioning holes 3104 are arranged at intervals along the length direction of the frame 13. When the base 404 moves back and forth along the frame 13, the positioning columns 3204 can correspond to each positioning hole 3104 one by one. An elastic member 3304 is further provided in the frame 13 for driving the positioning columns 3204 to insert into the positioning holes 3104 to form a lock; the button four 3004 is slidably set on the base 404 along the length direction of the frame 13, and a sliding cavity is opened on the button four 3004. A positioning block 3404 is movably provided in the dynamic cavity, and a plurality of inclined guide grooves 3504 are opened on the button four 3004, and a plurality of guide posts 3604 corresponding to the inclined guide grooves 3504 are fixed on the positioning block 3404. The guide posts 3604 are inserted into the inclined guide grooves 3504, and the positioning block 3404 is lifted and lowered relative to the button four 3004 along the inclined guide grooves 3504 through the guide posts 3604; a plurality of protrusions 3704 corresponding to the positions of the positioning holes 3104 are fixed at the bottom of the positioning block 3404. When the button four 3004 is pressed, the button four 3004 pushes the positioning block 3404 to descend, so that the protrusions 3704 extend into the positioning holes 3104 and the positioning posts 3204 are withdrawn from the positioning holes 3104 to form unlocking.

[0180] The seat can be adjusted in height up and down as well as left and right, and can be adaptively adjusted for children of different heights. When adjusting the seat height, the force storage spring pushes the seat to automatically rise, making seat height adjustment more time-saving and labor-saving. In order to prevent the seat from completely falling out of the base when the force storage spring pushes it to rise, the limit pin and the limit slot cooperate to prevent the seat from completely falling out of the base when the seat is raised; by pressing button three, the limit pin is withdrawn from the limit slot, making it easier to disassemble and install the seat. When the locking block is inserted into the upper lock hole, the lock hole is a waist-shaped hole. Combined with the design of the force storage spring, the seat can be raised and lowered slightly along the waist-shaped hole through the locking block, which has a shock-absorbing effect when riding.

Claims

1. An adjustable baby carriage, comprising a frame, a seat, a front wheel arranged at the front end of the frame, and a rear wheel arranged at the rear end of the frame, wherein the rear wheel is arranged on the frame through a wheel seat, and the rear wheel is rotatably arranged on the wheel seat, characterized in that: The rear end of the frame is provided with an insertion beam, which is inserted into the wheel seat. A length adjustment mechanism is provided between the wheel seat and the insertion beam to adjust the insertion depth of the insertion beam.

2. An adjustable baby carriage, comprising a frame, a seat, a front wheel arranged at the front end of the frame, and a rear wheel arranged at the rear end of the frame, wherein the rear wheel is arranged on the frame through a wheel seat, and the rear wheel is rotatably arranged on the wheel seat, characterized in that: The rear end of the frame is provided with an insertion beam, which is inserted into the wheel seat. A length adjustment mechanism is provided between the wheel seat and the insertion beam to adjust the insertion depth of the insertion beam.

3. The adjustable baby stroller according to claim 1, characterized in that: A guide groove is provided at the rear end of the insertion beam, and the guide groove extends along the length direction of the insertion beam. A guide rod is fixedly provided in the wheel seat. When the rear end of the insertion beam extends into the slide groove, the guide rod is correspondingly inserted into the guide groove. When the wheel seat moves back and forth along the insertion beam, the guide rod moves synchronously along the guide groove; the guide rod horizontally penetrates the insertion beam.

4. The adjustable baby stroller according to claim 1, characterized in that: An anti-unhooking device is also provided between the insertion beam and the wheel seat to prevent the insertion beam from escaping from the wheel seat.

5. The adjustable baby stroller according to claim 2, characterized in that: The locking mechanism includes a button 1 arranged on the wheel seat and a lock hole provided on the insertion beam. The plurality of lock holes are arranged at intervals along the length direction of the insertion beam. A mounting hole is provided on the wheel seat. The button 1 is slidably arranged in the mounting hole along the length direction of the insertion beam. The outer end of the button 1 extends out of the mounting hole. A locking block is also provided in the mounting hole. 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 fixedly provided on the locking block. The limit block extends into the slideway. When the button 1 is pressed, the button 1 pushes the locking block up and down through the inclined abutting surface, so that the limit block exits the card hole to form unlocking. A reset spring 1 is also provided in the mounting hole to push the lock block to reset, so that the limit block is inserted into the card hole to form locking.

6. The adjustable baby stroller according to claim 1, characterized in that: The seat is slidably arranged on the frame along the length direction of the frame, and a limiting mechanism is also arranged between the seat and the frame for locking the relative position of the seat and the frame; the limiting mechanism includes a button 2 arranged on the seat and a clamping hole provided on the frame, and a plurality of clamping holes are arranged at intervals along the length direction of the frame; a slide groove is provided on the seat, and button 2 is slidably arranged in the slide groove along the length direction of the slider, and the outer end of button 2 extends out of the slide groove, and a push block is also provided in the slide groove, and the inner end of button 2 abuts against the push block, and the abutting surface between button 2 and the push block is an inclined surface, and a latch is fixed on the push block. When button 2 is pressed, button 2 pushes the push block up and down through the inclined abutting surface, so that the latch withdraws from the clamping hole to form unlocking, and a reset spring 2 is also provided in the slide groove to push the push block to reset, so that the latch is inserted into the clamping hole to form locking.

7. The adjustable baby stroller according to claim 1, characterized in that: The seat is slidably arranged on the frame along the length direction of the frame, and a limiting mechanism is also arranged between the seat and the frame for locking the relative position of the seat and the frame; the limiting mechanism includes a button 3 movably arranged on the seat, a positioning hole provided on the seat, and a positioning column movably arranged on the frame, and a plurality of positioning holes are arranged at intervals along the length direction of the frame. When the seat moves forward and backward along the frame, the positioning column can correspond to each positioning hole one by one, and an elastic member 1 is also arranged in the frame for driving the positioning column to insert into the positioning hole to form a lock; the button 3 is slidably arranged on the seat along the length direction of the frame, a sliding cavity is provided on the button 3, and a positioning block is movably provided in the sliding cavity, a plurality of oblique guide grooves are provided on the button 3, and a plurality of guide columns corresponding to each oblique guide groove are fixed on the positioning block, and the guide columns are inserted into the oblique guide grooves, and the positioning block is lifted and lowered relative to the button 3 along the oblique guide grooves through the guide columns; a plurality of convex columns corresponding to the positions of each positioning hole are fixed on the bottom of the positioning block, and the button 3 is pressed, and the button 3 pushes the positioning block to descend, so that each convex column extends into the positioning hole and the positioning column is withdrawn from the positioning hole to form an unlocking.

8. The adjustable baby stroller according to claim 2, characterized in that: The locking mechanism comprises a button four movably arranged on the wheel seat, a mounting hole provided on the wheel seat, and a mounting column movably arranged on the insertion beam, wherein the plurality of mounting holes are arranged at intervals along the length direction of the insertion beam, and when the wheel seat moves forward and backward along the insertion beam, the mounting columns can correspond to each mounting hole one by one, and an elastic member two is further provided in the insertion beam for driving the mounting column to insert into the mounting hole to form a lock; the button four is slidably arranged on the wheel seat along the length direction of the insertion beam, a sliding cavity is provided on the button four, and a mounting block is movably provided in the sliding cavity, the button four is provided with a plurality of oblique grooves, and a plurality of guide blocks corresponding to each oblique groove are fixedly provided on the mounting block, the guide blocks are inserted into the oblique grooves, and the mounting block is lifted and lowered relative to the button four along the oblique grooves through the guide blocks; a plurality of protrusions corresponding to the positions of each mounting hole are fixedly provided at the bottom of the mounting block, and the button four is pressed, and the button four pushes the mounting block down, so that each protrusion extends into the mounting hole and the mounting column is withdrawn from the mounting hole to form an unlocking.

9. The adjustable baby stroller according to claim 2, characterized in that: The upper end of the jack is open, and the lower end is closed.

10. The adjustable baby stroller according to claim 1, characterized in that: An extension piece is fixedly provided at the rear end of the insertion beam, and a guide groove is provided on the extension piece. The guide groove extends along the length direction of the insertion beam. A guide rod is fixedly provided in the wheel seat. When the rear end of the insertion beam extends into the slide groove, the guide rod is correspondingly inserted into the guide groove. When the wheel seat moves back and forth along the insertion beam, the guide rod moves synchronously along the guide groove; the guide rod horizontally penetrates the extension piece.

11. The adjustable baby stroller according to claim 1, characterized in that: The seat is arranged on a wheel seat, a base is fixedly arranged on the wheel seat, the seat is arranged on the base and can be lifted and lowered relative to the base, and an up and down locking mechanism is also arranged between the seat and the base for locking the relative position of the seat and the base.

12. The adjustable baby stroller according to claim 1, characterized in that: A sliding adjustment groove is provided on the frame, and a sliding seat is fixedly provided at the bottom of the seat. The sliding seat can be directly inserted into the notch of the sliding adjustment groove and can be kept in the sliding adjustment groove and reciprocate along the sliding adjustment groove. An anti-unhooking structure is provided between the sliding seat and the sliding adjustment groove to prevent the sliding seat from being pulled out of the notch of the sliding adjustment groove.

13. An adjustable baby stroller according to claim 12, characterized in that: The sliding seat includes a plug-in portion, and the anti-unhooking structure includes a blocking member and a retaining edge arranged on the side of the sliding adjustment groove. The blocking member is arranged in the sliding adjustment groove. The plug-in portion is inserted into the sliding adjustment groove and cooperates with the blocking member in the insertion and withdrawal direction. A first blocking portion is provided on the blocking member, and the first blocking portion is blocked by the retaining edge on the corresponding side when the blocking member is pulled out of the sliding adjustment groove.

14. An adjustable baby stroller according to claim 13, characterized in that: The blocking member further comprises a second blocking portion. At least one block is arranged on the side of the plug-in portion. The second blocking portion blocks the movement path of the corresponding block when it is withdrawn from the sliding adjustment groove.

15. An adjustable baby stroller according to claim 14, characterized in that: There are two plug-in parts, which are arranged in parallel, and a block is provided on the same side of the lower end. The block located on the outside is blocked by the retaining edge on the corresponding side of the sliding adjustment groove, and the other block located between the two plug-in parts is blocked by the second blocking part of the above-mentioned blocking member.

16. The adjustable baby stroller according to claim 14, characterized in that: There are two plug-in parts, which are arranged in parallel. Blocks are provided on the inner sides of the two plug-in parts facing each other. The blocking member is provided with two second blocking parts corresponding to the two above-mentioned blocks. When the block is pulled out of the sliding adjustment groove, it is blocked by the corresponding second blocking part.

17. The adjustable baby stroller according to claim 14, characterized in that: There are two groups of card blocks, which are arranged on both sides of the plug-in part, and there are also two groups of corresponding retaining edges, which are arranged on both sides of the notch of the sliding adjustment groove. The blocking member is in the form of a sheet and is located between the card block and the corresponding retaining edge. One side of the blocking member overlaps with the projection of the card block in the insertion direction, and the other side overlaps with the projection of the retaining edge in the insertion direction of the sliding seat.

18. The adjustable baby stroller according to claim 13, characterized in that: The front end and the rear end of the seat are provided with extension sections exceeding the plug-in portion, and the extension sections are used to cover the sliding adjustment groove when the seat slides along the sliding adjustment groove.

19. The adjustable baby stroller according to claim 14, characterized in that: When the lower end surface of the seat is against the vehicle frame, the distance between the upper end surface of the clamping block and the inner side surface of the retaining edge is matched with the thickness of the blocking member.

20. The adjustable baby stroller according to claim 12, characterized in that: The frame includes a vehicle beam, a front rotating frame and a front wheel rotating assembly. The vehicle beam is hollow and communicated with a sliding adjustment groove. The front end opening is connected to the front rotating frame. The front wheel rotating assembly is rotatably arranged on the front rotating frame. The front wheel is rotatably arranged on the front wheel rotating assembly. The rear wheel is arranged on the vehicle beam. The support seat can slide from the open end of the vehicle beam into the sliding adjustment groove.

21. The adjustable baby stroller according to claim 13, characterized in that: An avoidance groove for inserting a seat adjustment rod and used for adjusting the seat up and down, front and back is reserved on the blocking member or between the blocking member and the sliding adjustment groove.

22. The adjustable baby stroller according to claim 12, characterized in that: The sliding seat includes a plug-in portion, and the anti-unhooking structure includes a blocking member and a second blocking member opened on the blocking member. At least one blocking block is provided on the side of the plug-in portion, and the second blocking member blocks the movement path of the corresponding blocking block when it is pulled out of the sliding adjustment groove. The blocking member is fixedly arranged in the sliding adjustment groove.

23. The adjustable baby stroller according to claim 1, characterized in that: A base is provided on the frame, and the seat is movably arranged on the base. The base is provided with multiple plug-in gears from top to bottom. A slide 2 is provided on the bottom surface of the seat, and a sliding matching structure is provided between the slide 2 and the above-mentioned plug-in gear. The slide 2 of the above-mentioned seat can be plug-in matched with each plug-in gear to adjust the height of the seat. A reversing mechanism is also provided between the seat and the base for turning the seat around and making the seat orientation mirror-symmetrical with the original orientation.

24. An adjustable baby stroller according to claim 23, characterized in that: The sliding matching structure is located between the corresponding inner wall of the second slide and the outer wall of the base, and includes a slider and at least two second slide grooves. The second slide grooves are arranged in parallel from top to bottom. The slider can be plugged into each second slide groove. The slider is arranged on the inner wall of the second slide or the outer wall of the base, and the corresponding second slide groove is arranged on the corresponding outer wall of the base or the inner wall of the second slide.

25. An adjustable baby carriage according to claim 23 or 24, characterized in that: The reversing mechanism is a slideway with one end passing through the seat, and the end can be plugged and matched with each gear plug-in gear position from the front or rear of the seat to realize the reversal of the seat.

26. An adjustable baby carriage according to claim 23 or 24, characterized in that: The base includes a seat body and a connecting seat, the above-mentioned reversing mechanism includes a rotating shaft and a second locking mechanism arranged on the connecting seat, the seat body is arranged on the frame, the connecting seat is rotatably arranged on the seat body by the above-mentioned rotating shaft and is locked and unlocked by the second locking mechanism, the above-mentioned multiple gear plug-in gears are all arranged on the connecting seat, and the seat is plugged into and matched with the connecting seat.

27. An adjustable baby stroller according to claim 26, characterized in that: The seat body is provided with an arc-shaped guiding groove, and the connecting seat is provided with a guiding block clamped in the guiding groove. When the connecting seat rotates relative to the seat body, the guiding block moves along the guiding groove.

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