CN209995765U

CN209995765U - foldable baby walker

Info

Publication number: CN209995765U
Application number: CN201920428018.XU
Authority: CN
Inventors: 顾总照; 潘莎莎
Original assignee: Zhongshan Haiyida Children's Products Co Ltd
Current assignee: Zhongshan Haiyida Children's Products Co Ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2020-01-31
Anticipated expiration: 2029-03-29

Abstract

The utility model discloses an collapsible walker, including chassis underframe (1), be equipped with front wheel subassembly (2) and rear wheel subassembly (3) on chassis underframe (1), chassis underframe (1) front end rotates and is connected with preceding vaulting pole (4), preceding vaulting pole (4) upper end is rotated and is connected with seat frame (5) including can supplying the infant to take or stand, be equipped with between seat frame (5) and chassis underframe (1) and rotate back support subassembly (6) of being connected with the two, back support subassembly (6), seat frame (5), preceding vaulting pole (4) and chassis underframe (1) constitute four-bar linkage, and, when walker removes to folding position from expansion position, back support subassembly (6) upper end and seat frame (5) rear end reach the position that is close to chassis underframe (1) front end, the front end of seat frame (5) reachs the position that is close to chassis underframe (1) rear end, the utility model discloses simple structure, it is folding simple and convenient, and the cost is smooth and easy.

Description

foldable baby walker

[ technical field ] A method for producing a semiconductor device

The utility model relates to an kinds of foldable walker.

[ background of the invention ]

The baby walker is a common product in the growth process of infants. However, the traditional baby walker is troublesome to fold and not smooth enough, and the structure of the traditional baby walker is complex and the cost is high.

Therefore, the present invention is based on the above disadvantages.

[ Utility model ] content

The utility model aims at overcoming the defects of the prior art, providing foldable walker which has simple structure, convenient and smooth folding and low cost.

The utility model discloses a realize through following technical scheme:

A foldable walker which can move from an unfolded position to a folded position after a locking device is unlocked is characterized in that the foldable walker comprises a chassis frame 1, a front wheel assembly 2 and a rear wheel assembly 3 are arranged on the chassis frame 1, the front end of the chassis frame 1 is rotatably connected with a front support rod 4, the upper end of the front support rod 4 is rotatably connected with a seat frame 5 for an infant to sit or stand in, a rear support assembly 6 which is rotatably connected with the seat frame 5 and the chassis frame 1 is arranged between the seat frame 5 and the chassis frame 1, the rear support assembly 6, the seat frame 5, the front support rod 4 and the chassis frame 1 form a four-bar mechanism, when the walker moves from the unfolded position to the folded position, the upper end of the rear support assembly 6 and the rear end of the seat frame 5 reach positions close to the front end of the chassis frame 1, and the front end of the seat frame 5 reaches positions close to the rear end of the chassis frame 1.

The foldable walker as described above, characterized in that: the rear support assembly 6 comprises an upper support pipe 61 rotatably connected with the seat frame 5 and a lower support pipe 62 rotatably connected with the chassis frame 1, the lower support pipe 62 is slidably connected with the upper support pipe 61, and a height adjusting device is arranged between the upper support pipe 61 and the lower support pipe 62.

The foldable walker as described above, characterized in that: the height adjusting device comprises a plurality of locking holes 641 formed in the lower support tube 62 and locking pin holes 642 formed in the upper support tube 61, a locking pin 643 which can move transversely and is engaged with the locking pin holes 642 and the locking holes 641 simultaneously to lock the upper support tube 61 and the lower support tube 62 is further provided in the upper support tube 61, and a driving member 644 which can drive the locking pin 643 to be engaged with the locking pin holes 642 and the locking holes 641 or drive the locking pin 643 to be disengaged from the locking holes 641 is further provided in the upper support tube 61.

The foldable walker as described above, characterized in that: the upper bracing tube 61 is internally provided with a fixed block 645, the fixed block 645 is provided with a transverse hole 646, the locking pin 643 is arranged in the transverse hole 646, the driving part 644 comprises a driving spring 6441 which is arranged in the transverse hole 646 and can push the locking pin 643 to transversely move so as to be clamped with the locking hole 641, the driving part 644 further comprises a driving block 6442 which can move up and down along the upper bracing tube 61, the driving block 6442 is provided with a slope 6443 which can push the locking pin 643 to transversely move so as to compress the driving spring 6441 when the driving block 6442 moves longitudinally, and the upper bracing tube 61 is provided with an operating sleeve 6444 which is connected with the driving block 6442 and can drive the driving block 6442 to longitudinally move.

The foldable walker as described above, characterized in that: a bounce spring 63 is arranged between the upper support tube 61 and the lower support tube 62, and an unlocking holding part 65 which can be matched with the operating sleeve 6444 to keep the locking pin 643 and the locking hole 641 separated is arranged on the upper support tube 61.

The foldable walker as described above, characterized in that: the unlock holding portion 65 includes an elastic barb provided on the upper support tube 61 and capable of being pressed, and after the operation sleeve 6444 pulls the driving block 6442 to disengage the locking pin 643 from the locking hole 641, the elastic barb catches on the operation sleeve 6444 to prevent the operation sleeve 6444 from sliding with respect to the upper support tube 61.

The foldable walker as described above, characterized in that: and a jacking spring 6445 is arranged between the lower end of the driving block 6442 and the fixed block 645.

The foldable walker as described above, characterized in that: the rear wheel assembly 3 comprises a connecting seat 31 connected with the chassis frame 1, a wheel 32 is rotatably connected on the connecting seat 31, a brake block 33 which can move up and down and can be matched with the inner circumferential surface 32a of the wheel 32 is arranged in the connecting seat 31, and an adjusting part 34 which can push the brake block 33 to adjust the tightness degree of the brake block 33 and the inner circumferential surface 32a when rotating is arranged on the connecting seat 31 in a penetrating manner.

The foldable walker as described above, characterized in that: the adjusting member 34 includes a rotating shaft 341 penetrating through the connecting seat 31, a knob 342 passing through the wheel 32 and capable of being connected with the rotating shaft 341 to drive the rotating shaft 341 to rotate is disposed at the outer side of the wheel 32, a boss 343 protruding outward is disposed on the rotating shaft 341, the boss 343 has a circumferential surface, a contact post 33a contacting the circumferential surface of the boss 343 is disposed on the brake pad 33, and when the boss 343 is projected, an outer profile curve 343a of the boss 343 is in an involute shape.

The foldable walker as described above, characterized in that: the locking device is arranged between the front support rod 4 and the chassis frame 1, the locking device comprises a connecting shell 71 arranged on the chassis frame 1 and a locking shell 72 arranged at the lower end of the front support rod 4, spline grooves 73 are arranged in the connecting shell 71 and the locking shell 72, a sealed space is enclosed by the connecting shell 71 and the locking shell 72, splines 74 capable of moving transversely in the sealed space and being clamped with the spline grooves 73 on the connecting shell 71 and the locking shell 72 at the same time are arranged in the sealed space, a return spring 75 is further arranged between the splines 74 and the locking shell 72, a pushing button 76 capable of sliding relative to the front support rod 4 is arranged on the front support rod 4, and a cable 77 which is connected with the pushing button 76 and the splines 74 and can pull the splines 74 to enable the splines 74 to be separated from the spline grooves 73 on the connecting shell 71 when the pushing button 76 slides is further arranged in the front support rod 4 in a penetrating manner.

Compared with the prior art, the utility model discloses there is following advantage:

1. the utility model discloses a vaulting pole before chassis underframe front end rotates to be connected, preceding vaulting pole upper end is rotated and is connected with the seat frame, be equipped with again between seat frame and the chassis underframe and rotate the back stay subassembly of being connected with the two, when the walker is folding, back stay subassembly upper end and seat frame rear end then move to being close to chassis underframe front end position, and seat frame front end then moves to being close to chassis underframe rear end position, whole walker constitutes four-bar linkage, it is very convenient smooth and easy to fold, and whole walker simple structure, the cost is also very cheap.

2. The utility model discloses a be provided with high adjusting device between last stay tube and the stay tube down, high adjusting device is including setting up a plurality of locking holes on the stay tube down, consequently, highly can the regulation and the locking of back support subassembly, and the user can adjust the height of back support subassembly according to infant's self needs to make infant be in more comfortable state, more humanized.

3. The utility model discloses a back support subassembly is when the height-adjusting, only need upwards mention the operation cover, the operation cover just stimulates the drive block, inclined plane on the drive block just promotes stop pin lateral shifting, make the stop pin withdraw from in the locking hole, upward prop pipe and prop the pipe down and just unblock this moment, and drive spring receives the compression, just can make this moment prop pipe and prop the pipe down and slide relatively, when the two slides to suitable position, loosen the operation cover and make the drive block descend, inclined plane on the drive block no longer supports and leans on the stop pin, drive spring just replies the extension to promote stop pin lateral shifting this moment, the stop pin just with other locking hole blocks, the altitude mixture control and the locking of back support subassembly have just been realized this moment, whole operation process is simple swift very.

4. The utility model discloses a be equipped with the spring between last stay tube and the lower stay tube, be equipped with on the last stay tube and make the unblock holding part that stop pin and locking hole keep breaking away from with the cooperation of operation cover, when unblock holding part and operation cover cooperation, the operation cover just makes the position of drive block keep, the inclined plane on the drive block just supports with the stop pin and supports and make stop pin and locking hole keep the state of breaking away from, the unblock state of last stay tube and lower stay tube can keep this moment, it just can relative slip with the lower stay tube to go up stay tube this moment, owing to be provided with the spring between last stay tube and the lower stay tube again, so when the baby takes the action of standing and crouching down on the seat pocket in the seat frame, upward the stay tube will appear drunkenness from top to bottom, just like the jump appearance of bouncing on the trampoline, make the baby's car become infant's apparatus of travelling.

5. The utility model discloses a be provided with the brake block that can reciprocate in the connecting seat of rear wheel subassembly, the interior circumference of brake block and wheel cooperates, and adjusting part in the connecting seat can promote the brake block and adjust the elasticity degree between brake block and the wheel when rotating moreover to reached the purpose of speed governing, the user of being convenient for adjusts the speed of walker according to infant's walking ability, so that infant's walking ability is tempered best, and also more ensure safety.

6. The utility model discloses an outline curve of the epaxial boss in rotation of adjusting part is involute shape, so along the global direction of boss, the periphery of boss and the distance in axis of rotation axle center present and increase progressively, so when the axis of rotation rotates, the circumferential surface of boss just can promote the relative connecting seat rebound of brake block, the brake block is at the in-process of rebound just tighter with the wheel laminating, thereby can reach the mesh that slows down, when needs wheel speed accelerates, only need the rotatory axis of rotation in opposite direction, the brake block just descends this moment, the brake block just reduces to the pressure that the wheel was applyed, thereby make the purpose with higher speed of walker. The whole speed regulating structure is designed skillfully, and the operation is very convenient and fast.

7. The utility model discloses the walker only needs to promote the button when needs are folding, and the cable just stimulates spline lateral shifting, and when the spline groove on spline and the connection shell broke away from, the preceding vaulting pole just can have rotated with the chassis underframe relatively this moment, and locking device unblock this moment, the walker just can have been folded. The whole locking device is simple in structure and convenient and quick to operate.

8. The utility model discloses simple structure, convenient operation is swift, and low cost is fit for pushing away and uses.

[ description of the drawings ]

FIG. 1 is a perspective view of the present invention;

fig. 2 is a side view of the present invention in an unfolded state;

fig. 3 is a side view of the present invention during folding;

fig. 4 is a side view of the present invention in a folded state;

fig. 5 is an exploded view of components of the present invention;

fig. 6 is a perspective view of the seat frame of the present invention;

FIG. 7 is a perspective view of the chassis frame of the present invention;

fig. 8 is a perspective view of a rear wheel assembly of the present invention;

figure 9 is a cross-sectional view of the rear wheel assembly of the present invention;

fig. 10 is an exploded view of the rear wheel assembly of the present invention;

FIG. 11 is an enlarged view at A of FIG. 10;

fig. 12 is a cross-sectional view of a component of the present invention;

figure 13 is a perspective view of the back support assembly of the present invention;

fig. 14 is a cross-sectional view of the upper stay tube and the rear stay tube of the present invention after being unlocked;

FIG. 15 is an enlarged view at B of FIG. 14;

FIG. 16 is an enlarged view at C of FIG. 14;

fig. 17 is a cross-sectional view of the upper stay tube and the rear stay tube of the present invention when locked;

FIG. 18 is an enlarged view at D of FIG. 17;

fig. 19 is an exploded view of the back support assembly of the present invention;

fig. 20 is a second exploded view of the back support assembly of the present invention.

[ detailed description ] embodiments

The present invention will be described in with reference to the accompanying drawings:

as shown in fig. 1 to 4, foldable walker capable of moving from an unfolded position to a folded position after a locking device is unlocked comprises a chassis frame 1, wherein the chassis frame 1 is provided with a front wheel assembly 2 and a rear wheel assembly 3, the front end of the chassis frame 1 is rotatably connected with a front support rod 4, the upper end of the front support rod 4 is rotatably connected with a seat frame 5 for an infant to sit or stand on, a rear support assembly 6 rotatably connected with the seat frame 5 and the chassis frame 1 is arranged between the seat frame 5 and the chassis frame 1, the rear support assembly 6, the seat frame 5, the front support rod 4 and the chassis frame 1 form a four-bar linkage, and when the walker moves from the unfolded position to the folded position, the upper end of the rear support assembly 6 and the rear end of the seat frame 5 reach a position close to the front end of the chassis frame 1, the front end of the seat frame 5 reaches a position close to the rear end of the chassis frame 1, the front end of the chassis frame 5 is rotatably connected with the front support rod 4, the seat frame 5 and the chassis frame are connected with the chassis frame 1, and the chassis frame 6, and the chassis frame can easily move from the folded position to the folded position, and the folded position, the walker occupies a small space, and the whole walker is simple structure, and the small walker is low cost is low.

As shown in fig. 1, 13, 14, 15 and 20, the rear support assembly 6 includes an upper support tube 61 rotatably connected to the seat frame 5 and a lower support tube 62 rotatably connected to the chassis frame 1, the lower support tube 62 is slidably connected to the upper support tube 61, and a height adjusting device is disposed between the upper support tube 61 and the lower support tube 62. Therefore, the upper support tube 61 can slide relative to the lower support tube 62 to adjust the overall height of the rear support assembly 6, and thus the height of the walker. When the infant sits in a seat pocket (not shown) in the seat frame 5, the user can freely adjust the height of the walker according to the height of the infant, thereby allowing the infant to be in a more comfortable position.

As shown in fig. 13, 14, 15 and 20, the height adjusting device includes a plurality of locking holes 641 formed in the lower support tube 62 and locking pin holes 642 formed in the upper support tube 61, a locking pin 643 transversely movable to be engaged with the locking pin holes 642 and the locking holes 641 simultaneously to lock the upper support tube 61 and the lower support tube 62 is further provided in the upper support tube 61, and a driving member 644 capable of driving the locking pin 643 to be engaged with the locking pin holes 642 and the locking holes 641 or driving the locking pin 643 to be disengaged from the locking holes 641 is further provided in the upper support tube 61. When the height of the back support assembly 6 needs to be adjusted, the driving part 644 drives the locking pin 643 to move transversely to be disengaged from the locking hole 641, so that the upper support tube 61 is unlocked from the lower support tube 62, and the height of the back support assembly 6 can be adjusted. When the upper supporting tube 61 slides to a desired position relative to the lower supporting tube 62, the driving part 644 moves the locking pin 643 transversely to engage with the locking hole 641, so that the upper supporting tube 61 is locked with the lower supporting tube 62, and the height of the back-up assembly 6 is locked.

As shown in fig. 13 to 20, a fixing block 645 is provided in the upper supporting tube 61, a transverse hole 646 is provided on the fixing block 645, the locking pin 643 is provided in the transverse hole 646, the driving member 644 includes a driving spring 6441 which is provided in the transverse hole 646 and pushes the locking pin 643 to move transversely to engage with the locking hole 641, the driving member 644 further includes a driving block 6442 which moves up and down along the upper supporting tube 61, a ramp 6443 which pushes the locking pin 643 to move transversely to compress the driving spring 6441 when it moves longitudinally is provided on the driving block 6442, an operating sleeve 6444 which is connected with the driving block 6442 and drives the driving block 6442 to move longitudinally is provided on the upper supporting tube 61, when the height of the rear supporting assembly 6 needs to be adjusted, the upper supporting tube 61 needs to be unlocked from the lower supporting tube 62 first, the operating sleeve 6444 is pulled up, the driving block 6442 is carried upward, the locking pin 6443 on the driving block 6442 touches the locking pin 643 to move transversely to push, so that the locking pin 643 moves transversely to move from the inner position to the locking hole 643, the locking pin 643 is locked, the locking pin 643 is pulled up and the locking pin 6444 is pushed back to be pushed out, the locking pin 6441 is pushed to be locked, the locking pin 6441, the locking pin is pushed to be retracted, the locking pin 6441, the locking pin, the locking tube 6441 is retracted, the locking pin, the entire locking pin 6441 is pushed to be retracted, the locking pin.

As shown in fig. 20, a drawbar 6446 formed with is provided on the driving block 6442, the upper end of the drawbar 6446 is connected with an operating sleeve 6444, and the driving block 6442 can pass through the fixing block 645 and the locking pin 643.

As shown in fig. 14, 16 and 19, a bouncing spring 63 is provided between the upper support tube 61 and the lower support tube 62, and the upper support tube 61 is provided with an unlocking holding portion 65 which is engaged with the operation sleeve 6444 to hold the locking pin 643 and the locking hole 641 separated, when the unlocking holding portion 65 is engaged with the operation sleeve 6444, the operation sleeve 6444 holds the position of the driving block 6442, the inclined surface 6443 of the driving block 6442 abuts against the locking pin 643 to hold the locking pin 643 and the locking hole 641 in the separated state, and at this time, the unlocked state of the upper support tube 61 and the lower support tube 62 is held, and at this time, the upper support tube 61 and the lower support tube 62 can slide relative to each other, and since the bouncing spring 63 is provided between the upper support tube 61 and the lower support tube 62, when the infant stands on the seat pocket in the seat frame 5 and bounces, the upper support tube 61 bounces up and down like a bed , and the infant walker is a play apparatus for playing a child.

As shown in FIGS. 13 and 20, the unlocking maintaining part 65 includes a resilient barb which is provided on the upper supporting tube 61 and can be pressed, and which hooks the operation sleeve 6444 to prevent the operation sleeve 6444 from sliding relative to the upper supporting tube 61 after the operation sleeve 6444 pulls the driving block 6442 to disengage the locking pin 643 from the locking hole 641. when the resilient barb hooks the operation sleeve 6444, the position of the operation sleeve 6444 is fixed, the position of the driving block 6442 is also fixed, the inclined surface 6443 on the driving block 6442 always abuts against the locking pin 643, and the driving spring 6441 is kept compressed, and the locking pin 643 is kept disengaged from the locking hole 641, so that the upper supporting tube 61 and the lower supporting tube 62 can slide relative to each other, and thus the infant can stand and move down in the seat frame 5 like bouncing on a trampoline , so that the walker is in the recreation mode.

As shown in fig. 17, a pressing spring 6445 is arranged between the lower end of the driving block 6442 and the fixed block 645, and the pressing spring 6445 presses the driving block 6442 downwards, so that when the upper supporting tube 61 and the lower supporting tube 62 are unlocked, -fixed pulling force needs to be applied to the operating sleeve 6444 to complete unlocking, the driving block 6442 is prevented from being unlocked by misoperation, and safety is ensured.

As shown in fig. 1, 8, 9, 10, and 11, the rear wheel assembly 3 includes a connection base 31 connected to the chassis frame 1, a wheel 32 is rotatably connected to the connection base 31, a brake block 33 capable of moving up and down and matching with an inner circumferential surface 32a of the wheel 32 is disposed in the connection base 31, and an adjusting member 34 capable of pushing the brake block 33 to adjust tightness between the brake block 33 and the inner circumferential surface 32a is further inserted into the connection base 31. The connecting seat 31 is internally provided with a brake block 33 which can move up and down, the brake block 33 is matched with the inner circumferential surface 32a of the wheel 32, and the adjusting part 34 in the connecting seat 31 can push the brake block 33 when rotating to adjust the tightness degree between the brake block 33 and the wheel 32, thereby achieving the purpose of speed regulation, being convenient for a user to adjust the speed of the baby walker according to the walking ability of the baby, leading the walking ability of the baby walker to be best exercised, and ensuring the safety.

As shown in fig. 9 to 12, the adjusting member 34 includes a rotating shaft 341 penetrating through the connecting seat 31, a knob 342 penetrating through the wheel 32 and capable of being connected to the rotating shaft 341 to drive the rotating shaft 341 to rotate is disposed at an outer side of the wheel 32, a boss 343 protruding outward is disposed on the rotating shaft 341, the boss 343 has a circumferential surface, a contact post 33a contacting the circumferential surface of the boss 343 is disposed on the brake pad 33, and when the boss 343 is projected, an outer profile curve 343a of the boss 343 is in an involute shape. As shown in fig. 12, the outer contour curve 343a of the boss 343 is involute, so along the circumferential direction of the boss 343, the distance between the circumferential surface of the boss 3443 and the axis of the rotating shaft 341 gradually increases, so when the rotating shaft 341 rotates, the circumferential surface of the boss 343 can push the brake pad 33 to move upward relative to the connecting seat 31, and the brake pad 33 is attached to the wheel 32 more tightly in the upward movement process, so as to achieve the purpose of deceleration. The whole speed regulating structure is designed skillfully, and the speed regulating operation is very convenient and fast.

As shown in fig. 11 and 12, the boss 343 is provided with a positioning block 344 protruding outward therefrom, the connecting seat 31 is provided with a stopper 35 capable of abutting against the positioning block 344 to limit the rotating shaft 341, and a retaining spring 36 for pressing the brake block 33 to keep the brake block 33 in contact with the circumferential surface of the boss 343 is further provided between the connecting seat 31 and the brake block 33. The positioning block 344 and the limiting block 35 are arranged to stop the rotating shaft 341 when the rotating shaft rotates to a set position, so that the brake block 33 is prevented from suddenly dropping from the highest point to the lowest point, and the whole speed adjusting structure is stable. Moreover, the arrangement of the retaining spring 36 can enable the brake block 33 to fall rapidly when acceleration adjustment is required, and also enables the contact post 33a on the brake block 33 to be always in contact with the circumferential surface of the boss 343, so that the brake block 33 can be smoothly pushed to move when the rotating shaft 341 rotates, and the stability and reliability of the structure are improved.

As shown in fig. 10 and 11, the connecting seat 31 is provided with a protruding sleeve 37, the wheel 32 is provided with a protruding connecting sleeve 38 at the center thereof, the connecting sleeve is sleeved on the sleeve 37 and can rotate relative to the sleeve 37, and the rotating shaft 341 is inserted into the sleeve 37. Therefore, the whole wheel speed regulating assembly is simple and compact in structure, convenient to assemble and low in cost.

As shown in fig. 10 and 11, the rotating shaft 341 is provided with a non-circular hole 345, the knob 342 includes a plate-shaped body 3421, and the body 3421 is provided with an insertion portion 3422 which is inserted into the non-circular hole 345 and can rotate with the rotating shaft 341. Since the insertion portion 3422 is shaped to match the shape of the non-circular hole 345, the rotation shaft 341 can be rotated when the main body 3421 is rotated, and the non-circular hole 345 may be a square hole in the present embodiment, or may be a hole having another shape such as a triangular hole.

As shown in fig. 8 and 9, the body 3421 is embedded in the wheel 32 and can rotate relative to the wheel 32. The body 3421 is embedded into the wheel 32, so the whole wheel speed regulating assembly has simple and compact structure, no large gap and no hand clamping during operation.

As shown in fig. 10, the body 3421 is provided with a protruding Y-shaped rib 3423 on the side opposite to the insertion part 3422. the Y-shaped rib 3423 is provided to allow the user to twist the knob 342 by the cooperation of the thumb, index finger and middle finger , so that the knob 342 can be easily twisted when the rotating shaft 341 is rotated at a speed-adjusting speed, and the operation is more convenient and labor-saving.

As shown in fig. 10, the connecting socket 31 includes a left connecting shell 311 and a right connecting shell 312 butted with the left connecting shell 311, and is convenient to manufacture, easy to assemble and low in cost.

As shown in fig. 1, 5 and 7, the locking device is provided between the front brace 4 and the chassis frame 1, the locking device includes a coupling case 71 provided on the chassis frame 1 and a locking case 72 provided at the lower end of the front stay 4, spline grooves 73 are arranged in the connecting shell 71 and the locking shell 72, a sealed space is enclosed by the connecting shell 71 and the locking shell 72, the sealed space is provided with a spline 74 which can move transversely in the sealed space and can be simultaneously clamped with the spline grooves 73 on the connecting shell 71 and the locking shell 72, a return spring 75 is arranged between the spline 74 and the locking shell 72, a push button 76 which can slide relative to the front stay bar 4 is arranged on the front stay bar, a cable 77 is further inserted into the front stay 4 to connect the push button 76 and the spline 74, and when the push button 76 slides, the cable can pull the spline 74 to disengage the spline 74 from the spline groove 73 of the connecting shell 71. When the baby walker needs to be folded, the push button 76 only needs to be pushed, the push button 76 pulls the pull cable 77 in the sliding process, the pull cable 77 pulls the spline 74 to transversely move in the sealed space, when the spline 74 is separated from the spline groove 73 in the connecting shell 71, the front support rod 4 is unlocked with the chassis frame 1, the front support rod 4 can rotate relative to the chassis frame 1, the locking device is unlocked at the moment, and the baby walker can be folded. The whole locking device is simple in structure and convenient and quick to operate. When the baby walker needs to be unfolded, the front support rod 4 is pulled to enable the front support rod 4 to rotate relative to the chassis frame 1, when the spline 74 rotates to the position aligned with the spline groove 73 in the connecting shell 71 along with the locking shell 72, the reset spring 75 pushes the spline 74 to move transversely, so that the spline 74 is clamped with the spline groove 73 in the locking shell 72 and the connecting shell 71 simultaneously, and at the moment, the front support rod 4 is locked with the chassis frame 1 again.

As shown in fig. 5, the front stay 4 is further provided with two locks capable of preventing the push button 76 from sliding when the walker is in an unfolded state, the two locks comprise a rotating button 781 capable of rotating relative to the front stay 4 and abutting against the push button 76, and a reset torsion spring for resetting is arranged between the rotating button 781 and the front stay 4. The provision of the turning knob 781 prevents the push knob 76 from sliding erroneously, thereby ensuring that the walker is not folded erroneously and is more secure. When the walker needs to be folded, the turning knob 781 is first rotated, and when the turning knob 781 is turned to a position where it no longer abuts against the push knob 76, the push knob 76 is pushed to slide.

As shown in fig. 5 and 6, the front stay 4 is provided at an upper end thereof with a plurality of coupling pieces 41 spaced from each other, a coupling groove 42 is formed between adjacent coupling pieces 41, the seat frame 5 is provided with a plurality of hinge pieces 51 spaced from each other, and the hinge pieces 51 are inserted into the coupling groove 42 and rotatably coupled to the coupling pieces 41 by the coupling shaft 8. The front stay bar 4 is rotatably connected with the seat frame 5 by inserting the plurality of hinge pieces 51 into the corresponding connecting grooves 42, so that the rotatable connection of the front stay bar and the seat frame is more stable and smooth, the use of raw materials can be reduced, and the cost is reduced.

Claims

The foldable baby walker is characterized by comprising a chassis frame (1), wherein a front wheel assembly (2) and a rear wheel assembly (3) are arranged on the chassis frame (1), the front end of the chassis frame (1) is rotatably connected with a front support rod (4), the upper end of the front support rod (4) is rotatably connected with a seat frame (5) for an infant to sit or stand in, a rear support assembly (6) which is rotatably connected with the seat frame (5) and the chassis frame (1) is arranged between the seat frame (5) and the chassis frame (1), the rear support assembly (6), the seat frame (5), the front support rod (4) and the chassis frame (1) form a four-bar linkage mechanism, when the baby walker moves from the unfolded position to the folded position, the upper end of the rear support assembly (6) and the rear end of the seat frame (5) reach a position close to the front end of the chassis frame (1), and the front end of the seat frame (5) reaches a position close to the rear end of the chassis frame (1).
2. The foldable walker of claim 1 wherein: the rear support assembly (6) comprises an upper support pipe (61) rotatably connected with the seat frame (5) and a lower support pipe (62) rotatably connected with the chassis frame (1), the lower support pipe (62) is slidably connected with the upper support pipe (61), and a height adjusting device is arranged between the upper support pipe (61) and the lower support pipe (62).
3. The foldable walker according to claim 2, wherein: the height adjusting device comprises a plurality of locking holes (641) arranged on a lower supporting pipe (62) and a locking pin hole (642) arranged on an upper supporting pipe (61), wherein a locking pin (643) which can move transversely and is simultaneously clamped with the locking pin hole (642) and the locking hole (641) to lock the upper supporting pipe (61) and the lower supporting pipe (62) is further arranged in the upper supporting pipe (61), and a driving part (644) which can drive the locking pin (643) to be clamped with the locking pin hole (642) and the locking hole (641) or drive the locking pin (643) to be separated from the locking hole (641) is further arranged in the upper supporting pipe (61).
4. The foldable walker of claim 3 wherein: the upper supporting pipe (61) is internally provided with a fixed block (645), the fixed block (645) is provided with a transverse hole (646), the locking pin (643) is arranged in the transverse hole (646), the driving part (644) comprises a driving spring (6441) which is arranged in the transverse hole (646) and can push the locking pin (643) to transversely move and be clamped with the locking hole (641), the driving part (644) also comprises a driving block (6442) which can vertically move along the upper supporting pipe (61), the driving block (6442) is provided with an inclined surface (6443) which can push the locking pin (643) to transversely move and compress the driving spring (6441) when the driving block (6442) longitudinally moves, and the upper supporting pipe (61) is provided with an operating sleeve (6444) which is connected with the driving block (6442) and can drive the driving block (6442) to longitudinally move.
5. The foldable walker of claim 4 wherein: a bounce spring (63) is arranged between the upper support tube (61) and the lower support tube (62), and an unlocking holding part (65) which can be matched with the operation sleeve (6444) to keep the locking pin (643) and the locking hole (641) to be separated is arranged on the upper support tube (61).
6. The foldable walker of claim 5 wherein: the unlocking holding part (65) comprises an elastic barb which is arranged on the upper supporting pipe (61) and can be pressed, and after the operation sleeve (6444) pulls the driving block (6442) to separate the locking pin (643) from the locking hole (641), the elastic barb catches on the operation sleeve (6444) to prevent the operation sleeve (6444) from sliding relative to the upper supporting pipe (61).
7. The foldable walker of claim 5 wherein: and a jacking spring (6445) is arranged between the lower end of the driving block (6442) and the fixed block (645).
8. The foldable walker as claimed in any one of claims 1 to 7 and , wherein the rear wheel assembly (3) comprises a connecting base (31) connected with the chassis frame (1), the connecting base (31) is rotatably connected with a wheel (32), a brake block (33) capable of moving up and down and being matched with an inner circumferential surface (32a) of the wheel (32) is arranged in the connecting base (31), and an adjusting member (34) capable of pushing the brake block (33) to adjust the tightness degree of the brake block (33) and the inner circumferential surface (32a) during rotation is arranged on the connecting base (31) in a penetrating manner.
9. The foldable walker of claim 8 wherein: the adjusting part (34) comprises a rotating shaft (341) arranged on the connecting seat (31) in a penetrating mode, a knob (342) penetrating through the wheel (32) and capable of being connected with the rotating shaft (341) to drive the rotating shaft (341) to rotate is arranged on the outer side of the wheel (32), a boss (343) protruding outwards is arranged on the rotating shaft (341), the boss (343) is provided with a circumferential surface, a contact column (33a) in contact with the circumferential surface of the boss (343) is arranged on the brake block (33), and when the boss (343) is projected, an outer contour curve (343a) of the boss (343) is in an involute shape.
10. The foldable walker as claimed in any one of claims 1 to 7 at , wherein the locking device is disposed between the front stay (4) and the chassis frame (1), the locking device comprises a connecting shell (71) disposed on the chassis frame (1) and a locking shell (72) disposed at the lower end of the front stay (4), spline grooves (73) are disposed in the connecting shell (71) and the locking shell (72), the connecting shell (71) and the locking shell (72) enclose a sealed space, a spline (74) capable of moving transversely therein and engaging with the spline grooves (73) of the connecting shell (71) and the locking shell (72) at the same time is disposed in the sealed space, a return spring (75) is disposed between the spline (74) and the locking shell (72), a pushing button (76) capable of sliding relative to the spline is disposed on the front stay (4), and a cable (77) capable of sliding the pushing button (76) and the pushing button (74) and pulling the spline (74) to disengage the connecting shell (71) when the pulling cable (74) and the pulling cable (73) are disposed in the front stay (4).