CN212172330U - Foldable children's shallow structure and have its children's table chair and crib - Google Patents

Abstract

The utility model discloses a foldable children's shallow structure and have its children's table chair and crib relates to children's shallow technical field, and its technical scheme main points are: the folding type folding chair comprises a frame group and a seat group, wherein the frame group comprises a joint mechanism box, a first underframe and a second underframe which are hinged to two ends of the bottom of the joint mechanism box, and a first top frame and a second top frame which are hinged to two ends of the top of the joint mechanism box, a locking mechanism is arranged on the joint mechanism box, supporting rods are arranged on the first underframe and the second underframe, the seat group comprises a seat plate, one end of the seat plate is rotated and arranged on one supporting rod, a sleeving groove used for being sleeved on the other supporting rod is formed in the other end of the seat plate, and the folding type folding chair further comprises a table plate and a hammock which can be disassembled on the first top frame and. The utility model discloses convertible multiple using-way, convenient folding and expansion to folding back volume is less, reduces occupation space, has the effect that improves its convenience of use.

Description

Foldable children's shallow structure and have its children's table chair and crib

Technical Field

The utility model relates to a children's shallow technical field, more specifically say, it relates to a foldable children's shallow structure and have its children's table chair and crib.

Background

A baby carriage is a handcart specially used for transporting babies, and the babies can sit, lie and rest in the baby carriage to replace passing back belts or cradles.

In the prior art, the baby stroller has various structures, and accordingly, the number of the rod pieces on the stroller frame and the connection relation of the rod pieces are different, so that the folding and unfolding principles of the strollers are different. In the prior art, a stroller generally has a frame assembly and a seat assembly disposed on the frame assembly, wherein the seat assembly is fixed on the frame assembly and is folded by each joint structure of the frame assembly.

But the beta structure of shallow among the prior art is comparatively complicated to behind the seat group fixed setup, lead to holistic expansion and folding process comparatively loaded down with trivial details, and folding back volume is great, occupy more space, lead to the use comparatively troublesome.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a foldable children's shallow structure, convenient folding and expansion to folding back volume is less, reduces occupation space, has the effect that improves its convenience of use.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a foldable children's shallow structure, includes frame group and seat group, frame group includes the joint mechanism case, articulates in chassis one and chassis two at joint mechanism bottom of the case portion both ends and articulates in roof-rack one and roof-rack two at joint mechanism roof portion both ends, be equipped with on the joint mechanism case and be used for locking chassis one, chassis two, roof-rack one and roof-rack two in the locking mechanical system who expandes or receive the state of closing, all be equipped with the bracing piece on chassis one and the chassis two, seat group includes the seat board, the one end of seat board is rotated and is located on one of them bracing piece, and the other end is offered and is used for cup jointing the groove on another bracing piece, and chassis one and chassis two expand and will cup joint the groove cup joint back on the bracing piece, and the seat board is in horizontal position.

Further setting: the seat group is still including folding the back of locating on the seat board, the back hinges in one of seat through the hinge and serves, just the one end that the back is close to the hinge is provided with the locating surface, when the back expandes to the maximum angle, the locating surface is contradicted in the seat on the surface, and when the back was folding, back and seat surface were inconsistent.

Further setting: the first bottom frame, the second bottom frame, the first top frame and the second top frame are all set to be U-shaped frames, two joint mechanism boxes are arranged, and the two joint mechanism boxes are respectively connected to two ends of each U-shaped frame.

Further setting: the first top frame and the second top frame are both provided with telescopic frames with adjustable lengths, the telescopic structures of the first top frame and the second top frame are consistent, the first top frame comprises a fixed rod hinged to the joint mechanism box and a movable frame inserted on the fixed rod in a sliding mode, and a fixing assembly used for fixing the movable frame in the fixed rod is arranged on the fixed rod.

Further setting: the fixed subassembly sets up the gangbar on the dead lever including the articulated, sets up in the button of gangbar one end and sets up in the spacing knot of the gangbar other end, set up the holding tank that is used for holding the gangbar on the dead lever, the adjustable shelf is close to the holding tank and has seted up a plurality of gear groove on the surface, the gangbar articulates in the holding tank, just be equipped with the torsional spring in the axis of rotation of gangbar, when the torsional spring is not atress, the button is located the holding tank and keeps away from outside the notch of adjustable shelf, spacing knot is located the holding tank and is close to the notch of adjustable shelf and inserts and connect spacing in the gear inslot.

Further setting: the first bottom frame and the second bottom frame are both provided with telescopic frames which are consistent with the telescopic structure of the first top frame.

Further setting: still include the truckle group, the truckle group is equipped with two and respectively demountable installation on chassis one and chassis two, the truckle group is including the cover frame and locate the gyro wheel at cover frame both ends, the cover frame can be dismantled and cup joint on chassis one or chassis two.

Further setting: still include the callus on the sole, the callus on the sole is equipped with two and respectively demountable installation on chassis one and chassis two, seted up on the callus on the sole and cup jointed the groove on chassis one or chassis two, just the callus on the sole bottom is equipped with the supporting shoe.

By adopting the technical scheme, the utility model discloses relative prior art compares, has following advantage:

1. the joint mechanism box provides a rotating hinge point for the first bottom frame, the second bottom frame, the first top frame and the second top frame, so that the frame can be conveniently unfolded and folded, the seat plate is detachably sleeved in the sleeving groove, the seat plate can be conveniently folded and unfolded, the whole structure is simple, the folding and unfolding operation process is simple and convenient, the size is small during folding, the occupied space is reduced, and the use convenience is improved;

2. the seat set is convenient to fold and unfold by the arrangement of the supporting rods, the sleeving groove is detached from the supporting rod during folding, so that the seat plate can be naturally hung on the other supporting rod, the whole frame can be folded conveniently, the size is small after folding, the occupied space is small, the transportation and the storage are convenient, and the use convenience is improved;

3. the backrest is arranged in a folding manner, so that the back support is provided for children, the folding and the storage are convenient, and the convenience of folding, unfolding and using is improved;

4. the length of the top frame I and the length of the top frame II can be adjusted according to use requirements by setting the top frame I and the top frame II as telescopic frames so as to meet different use scenes;

5. through detachable wheelset and the callus on the sole that sets up, can use wheelset and callus on the sole according to using the scene replacement to make things convenient for multiple form to switch the use, improve the convenience of using.

A second object of the present invention is to provide a child chair, which is convenient to fold and unfold, and has an effect of improving the convenience of use.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a children's table chair, includes foretell foldable children's shallow structure, still includes a table, the edge of table is equipped with the joint groove, the joint groove is in order to correspond with the roof-rack one and can dismantle the cup joint setting.

Through the cooperation of foldable children's shallow structure and hammock, can turn into children's table chair with folding shallow for children sit the back, have the table and place article, and the installation is very convenient, has the effect that improves the functional and convenience of its use.

A third object of the present invention is to provide a child's bed, which is convenient to fold and unfold, and has the effect of improving the convenience of use.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a crib comprises the folding type baby stroller structure, wherein when the locking mechanism is locked, the first top frame and the second top frame are both located on the same horizontal line, the crib further comprises a hammock, an embedding groove is formed in the bottom of the edge of the hammock, a position-giving opening is formed in the position, located on the joint mechanism box, of the hammock, and the embedding groove is detachably sleeved on the first top frame and the second top frame.

Through the cooperation of foldable children's shallow structure and hammock, can turn into crib with foldable shallow to supply children to have a rest, and the installation is very convenient, has the effect that improves its functional and convenience of using.

Drawings

FIG. 1 is a schematic structural view of a foldable stroller according to an embodiment;

FIG. 2 is a schematic structural view of the foldable stroller structure after the foot pads, the caster sets, the seat sets and the frame sets are disassembled;

FIG. 3 is a schematic structural view of the foldable stroller structure when folded and stored;

fig. 4 is a schematic structural view of the foldable stroller structure during deployment;

FIG. 5 is a partially sectioned view of the locking mechanism in the joint mechanism case;

FIG. 6 is an enlarged schematic view at A in FIG. 4;

FIG. 7 is an enlarged schematic view at B of FIG. 4;

FIG. 8 is a partial structural view of the fixed bar and the movable frame when they are cut open;

FIG. 9 is a schematic structural view of the third embodiment of the present invention relating to the installation of a child table and chair;

fig. 10 is a schematic structural diagram of the fourth embodiment about the installation of the child bed.

In the figure: 1. a frame group; 11. a joint mechanism case; 111. a placing groove; 112. positioning holes; 113. fixing grooves; 12. a first underframe; 13. a second underframe; 14. a first top frame; 141. fixing the rod; 1411. accommodating grooves; 142. a movable frame; 1421. a gear groove; 15. a second top frame; 16. a limiting groove; 17. mounting grooves; 2. A seat group; 21. a seat plate; 211. a sleeving groove; 22. a backrest; 221. positioning the surface; 23. a hinge; 3. A locking mechanism; 31. a slipknot; 32. a return spring; 33. locking; 34. a push spring; 4. a support bar; 5. a fixing assembly; 51. a linkage rod; 52. a button; 53. a limit buckle; 54. a torsion spring; 6. a caster set; 61. sleeving a frame; 62. a roller; 7. a foot pad; 71. a butt joint groove; 72. a support block; 8. a table plate; 81. a clamping groove; 9. a hammock; 91. a fitting groove; 92. a let position port; 10. a reset button; 101. a tripping head; 102. a button spring.

Detailed Description

The structure of the pushchair will be further described with reference to figures 1 to 10.

The first embodiment is as follows: the utility model provides a foldable children's shallow structure, as shown in fig. 1 and 2, including frame group 1 with locate the seat group 2 in frame group 1, frame group 1 is equipped with truckle group 6 and the callus on the sole 7 that can dismantle the replacement, when needs use the shallow to remove, installs truckle group 6 and removes, when needs act as the seat, can dismantle truckle group 6 and install callus on the sole 7 and support, make things convenient for the switching of multiple form to use.

As shown in fig. 1 and 3, the frame assembly 1 includes a joint mechanism box 11, a first base frame 12 and a second base frame 13 hinged to two ends of the bottom of the joint mechanism box 11, and a first top frame 14 and a second top frame 15 hinged to two ends of the top of the joint mechanism box 11, wherein the first base frame 12, the second base frame 13, the first top frame 14 and the second top frame 15 are all U-shaped frames, the joint mechanism box 11 is provided with two joint mechanism boxes 11, and the two joint mechanism boxes 11 are respectively connected to two ends of each U-shaped frame, so as to form a cart structure. The foldable stroller is supported by the first base frame 12 and the second base frame 13, the first top frame 14 is used for pushing the handrail, and the second top frame 15 is used for protecting the child, so that the foldable stroller is formed, the unfolding and folding of the stroller can be realized only by rotating the first base frame 12, the second base frame 13, the first top frame 14 and the second top frame 15, and the stroller is convenient and quick.

As shown in fig. 2, the caster sets 6 and the foot pads 7 are respectively arranged on the first chassis 12 and the second chassis 13, and the caster sets 6 and the foot pads 7 can be switched, installed and used through the application scene of the cart, so as to meet various use requirements. Specifically, the caster wheel group 6 comprises a sleeve frame 61 and rollers 62 rotatably arranged at two ends of the sleeve frame 61, and the sleeve frame 61 is detachably sleeved on the first underframe 12 or the second underframe 13; the foot pad 7 is provided with a butt joint groove 71 which is sleeved on the first underframe 12 or the second underframe 13, and the bottom of the foot pad 7 is provided with a supporting block 72. Install truckle set 6 or callus on the sole 7 through the mode that cup joints, make things convenient for truckle set 6 and callus on the sole 7's dismouting, improve the convenience of replacing the use.

As shown in fig. 1 and 2, the first base frame 12 and the second base frame 13 are both provided with a support rod 4, and two ends of the support rod 4 are respectively and fixedly connected to the inner walls of two sides of the U-shaped frame, so as to improve the structural strength of the first base frame 12 and the second base frame 13 and improve the stability of the support. Seat group 2 includes seat board 21 and the folding back 22 of locating on seat board 21, and on one of them bracing piece 4 was located in the rotation of the one end of seat board 21, the other end offered and was used for cup jointing the groove 211 of cup jointing on another bracing piece 4 to when folding, will cup joint the groove 211 and take off from bracing piece 4, can make seat board 21 hang down naturally under the action of gravity and carry out folding receipts on another bracing piece 4, make things convenient for the folding of seat. Wherein, seat plate 21's rotation end all adopts C type plastics to detain with cup jointing groove 211 and sets up to the setting can be dismantled on two bracing pieces 4 to seat plate 21, thereby conveniently takes off seat group 2 and carries out exclusive use.

As shown in fig. 1 and 2, the backrest 22 is hinged to one end of the seat through the damping hinge 23, and one end of the backrest 22 close to the hinge 23 is provided with a positioning surface 221, when the backrest 22 is unfolded to a maximum angle, the positioning surface 221 abuts against the surface of the seat, and when the backrest 22 is folded, the backrest 22 abuts against the surface of the seat, so that the backrest 22 can be folded and unfolded conveniently, and the use convenience is improved.

As shown in fig. 1, 3 and 4, in the process from the folded state to the unfolded state, the first top frame 14 and the second top frame 15 are folded in the direction away from each other, the first bottom frame 12 and the second bottom frame 13 are folded in the direction away from each other, so as to unfold the frame assembly 1, the seat plate 21 of the seat is folded upwards, so that the seat plate 21 is horizontal, the sleeving groove 211 of the seat plate 21 is sleeved on the supporting rod 4, and finally the seat backrest 22 is folded to a limit angle from the seat plate 21, so that the unfolding of the stroller can be completed.

As shown in fig. 1 and 5, the joint mechanism box 11 is provided with a locking mechanism 3 for locking the first bottom frame 12, the second bottom frame 13, the first top frame 14 and the second top frame 15 in an unfolded or folded state, so as to position the frame and improve the stability after unfolding and folding. Specifically, the locking mechanism 3 includes a movable buckle 31, a return spring 32 connected to the movable buckle 31, a lock catch 33, and a push spring 34 connected to the lock catch 33, wherein the movable buckle 31 and the return spring 32 are locked with the first chassis 12 and the second chassis 13 corresponding to each other, and the lock catch 33 and the push spring 34 are locked with the second top frame 15 corresponding to the first top frame 14.

As shown in fig. 5 and 6, the first chassis 12 and the second chassis 13 are both provided with a limiting groove 16, the joint mechanism box 11 is provided with two placing grooves 111 on inner side walls close to the first chassis 12 and the second chassis 13, the movable buckle 31 and the return spring 32 are installed in the placing grooves 111, two ends of the return spring 32 are respectively connected to bottoms of the movable buckle 31 and the placing grooves 111, the movable buckle 31 is slidably inserted into the placing grooves 111, and when the return spring 32 is not stressed, the movable buckle 31 penetrates out of the placing grooves 111 and is inserted into the limiting groove 16 to be limited, so as to lock the first chassis 12 and the second chassis 13. The edge of the notch of the first chassis 12 and the edge of the second chassis 13 are set to be rounded, and the edge of the end of the movable buckle 31 far away from the return spring 32 is correspondingly set to be rounded so as to reduce the contact area of the movable buckle and the second chassis in the inserting process, so that the movable buckle 31 can be conveniently separated from or inserted into the limiting groove 16, and the convenience of unfolding and folding the first chassis 12 and the second chassis 13 is improved. Furthermore, the positions of the first chassis 12 and the second chassis 13 opposite to the slipknots 31 when the first chassis 12 and the second chassis 13 are unfolded and folded to the maximum angle are both provided with limiting grooves 16 so as to position the two states of the first chassis 12 and the second chassis 13, and the joint mechanism box 11 is provided with a limiting part for limiting the maximum angle of the first chassis 12 and the second chassis 13 so as to provide a supporting stress point and further improve the stability of the first chassis 12 and the second chassis 13 after being unfolded.

As shown in fig. 5 and 7, the joint mechanism box 11 has positioning holes 112 formed on inner side walls thereof near the first top frame 14 and the second top frame 15, the first top frame 14 and the second top frame 15 are both provided with mounting grooves 17, the lock catch 33 and the pushing spring 34 are both mounted in the mounting grooves 17, wherein the lock catch 33 is inserted in the mounting grooves 17 in a sliding manner, two ends of the pushing spring 34 are respectively connected to bottoms of the lock catch 33 and the mounting grooves 17, and when the pushing spring 34 is not stressed, one end of the lock catch 33 penetrates through the mounting grooves 17 and is inserted into the positioning holes 112, so as to lock the first top frame 14 and the second top frame 15. Furthermore, a plurality of positioning holes 112 are uniformly distributed on the inner wall of the joint mechanism box 11 along the circumferential direction of the rotating shafts of the first top frame 14 and the second top frame 15, so that the positioning can be conveniently carried out according to different unfolding angles of the first top frame 14 and the second top frame 15, and various use requirements are met.

As shown in fig. 5 and 7, a reset button 10 and a fixing groove 113 are disposed on an outer side wall of the joint mechanism box 11, the reset button 10 is slidably inserted into the fixing groove 113, and the reset button 10 is provided with a plurality of trip heads 101 inserted into the positioning holes 112, the trip heads 101 and the positioning holes 112 are disposed in a one-to-one correspondence manner, wherein a moving stroke of the reset button 10 is greater than a stroke of the trip heads 101 for pushing the lock catch 33 out of the positioning holes 112, so as to facilitate the unlocking of the lock state of the lock catch 33. Further, be equipped with button spring 102 in fixed slot 113, button spring 102's both ends are connected respectively on reset button 10 and the tank bottom of fixed slot 113, and when button spring 102 did not receive the force, reset button 10's the end of pressing is located outside fixed slot 113, and unbuckle head 101 is located locating hole 112 for the position department of hasp 33, and not contact with hasp 33, automatic re-setting after reset button 10 pressed, make the state of hasp 33 pressed in the contact of unbuckle head 101, it is spacing to make things convenient for hasp 33 to insert to lock in locating hole 112, the convenience of operation and use is improved.

As shown in fig. 1 and 8, the first top frame 14 and the second top frame 15 are both provided with length-adjustable expansion frames, and the expansion structures of the two expansion frames are the same, wherein the first top frame 14 comprises a fixed rod 141 hinged to the joint mechanism box 11 and a movable frame 142 inserted into the fixed rod 141 in a sliding manner, and the fixed rod 141 is provided with a fixed assembly 5 for fixing the movable frame 142 in the fixed rod 141, so as to adjust the lengths of the first top frame 14 and the second top frame 15, and fix the fixed assembly 5 after adjustment, thereby improving the stability. Furthermore, the first bottom frame 12 and the second bottom frame 13 are both provided with telescopic frames with telescopic structures consistent with the first top frame 14, so that the supporting height can be adjusted according to use requirements, and various use scenes can be met. When the foldable bicycle is unfolded for use, the first top frame 14 is usually stretched to the longest length for convenient pushing, and the second top frame 15 is shortened to the shortest length for forming a safety stop lever to protect children, so as to improve the convenience and safety of use.

As shown in fig. 8, specifically, the fixing component 5 includes a linkage rod 51 hinged to the fixing rod 141, a button 52 disposed at one end of the linkage rod 51 and a limit buckle 53 disposed at the other end of the linkage rod 51, a receiving groove 1411 for receiving the linkage rod 51 is disposed on the fixing rod 141, a plurality of gear slots 1421 are disposed in the surface of the receiving groove 1411 near the receiving groove 142 in an array manner, the linkage rod 51 is hinged to the receiving groove 1411, a torsion spring 54 is disposed on a rotating shaft of the linkage rod 51, when the torsion spring 54 is not stressed, the button 52 is disposed outside the notch of the receiving groove 1411 far away from the receiving groove 142, and the limit buckle 53 is disposed outside the notch of the receiving groove 1411 near the receiving groove 142 and is inserted and limited in the gear. When length needs to be adjusted, the button 52 is pressed, the linkage rod 51 rotates and drives the limit buckle 53 to be separated from the gear groove 1421, the length of the expansion bracket can be changed, the button 52 is loosened after length adjustment, the linkage rod 51 can be driven to reset by utilizing the torsion of the torsion spring 54, the limit buckle 53 can be automatically driven to be inserted and limited in the gear groove 1421, the length of the expansion bracket is fixed, the whole operation process is very simple and convenient, and the use convenience is improved.

The working principle is as follows: when the cart is used, the caster sets 6 are mounted on the first base frame 12 and the second base frame 13, and the first base frame 12 and the second base frame 13 are unfolded for supporting. Then, the first top frame 14 and the second top frame 15 are unfolded, the second top frame 15 is unfolded to the horizontal position, the first top frame 14 is unfolded to the inclined angle position, and the first top frame 14 serves as a pushing handle to conveniently push the cart to move. Then, the sleeve joint groove 211 of the seat plate 21 is sleeved on the support rod 4, and the backrest 22 is turned over, so that a child can sit on the seat to complete the unfolding of the stroller. The length of the first top frame 14 and the length of the second top frame 15 can be adjusted according to requirements, the length of the first top frame 14 is suitable for the position pushed by a user, and the length of the second top frame 15 is suitable for the position suitable for serving as a safety stop lever when a child sits on the seat, so that the child is protected.

When folding, fold back 22 on seat board 21, take off seat board 21's the groove 211 that cup joints from bracing piece 4 afterwards for seat board 21 hangs down naturally and puts, rotates chassis one 12 and chassis two 13 to the direction of closing up after that, rotates roof-rack one 14 and roof-rack two 15 to the direction of closing up, can fold and accomodate, and the volume after accomodating is less, has reduced occupation space, and convenient the transition is with depositing.

According to the above technical scheme, the utility model discloses convenient folding and expansion to folding back volume is less, reduces occupation space, has the effect that improves its convenience of use.

The second embodiment is different from the first embodiment in that the seat assembly 2 includes a seat plate 21 and a detachable cloth cushion, and the cloth cushion is detachably mounted on the top frame 14 through a binding rope, so that the seat back 22 is conveniently formed and the safety of a child after sitting down is protected.

Third embodiment, this embodiment is directed to a children's table and chair, as shown in fig. 9, including the foldable stroller structure mentioned in the first embodiment, after the backrest 22 is unfolded, the backrest 22 is disposed close to the first top frame 14, so that when the stroller is pushed by the first top frame 14, the sitting direction of the child is the same as the traveling direction of the stroller, thereby improving the comfort. Wherein, still include a table 8, be equipped with joint groove 81 at the edge of table 8, joint groove 81 and two 15 top framves can dismantle in order to correspond and cup joint the setting to can install table 8 and use on two 15 top framves.

Fourth embodiment, this embodiment is directed to a child's bed, as shown in fig. 10, including the foldable stroller structure mentioned in the first embodiment, when the locking mechanism 3 is locked, the first top frame 14 and the second top frame 15 are all on the same horizontal line, and the seat assembly 2 is in the folded state. Still include a hammock 9, the edge bottom of hammock 9 is equipped with gomphosis groove 91, and hammock 9 has seted up to the position that is located joint mechanism case 11 and has let a mouthful 92, and gomphosis groove 91 can dismantle and cup joint on roof-rack one 14 and roof-rack two 15, conveniently installs hammock 9 in the shallow structurally to become the crib and use.

Wherein, the extension and contraction extension lengths of the first top frame 14 and the second top frame 15 are consistent, so as to ensure the balance of the hammock 9 after installation and improve the stability of the whole structure.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A folding stroller structure comprises a frame group (1) and a seat group (2), and is characterized in that the frame group (1) comprises a joint mechanism box (11), a first underframe (12) and a second underframe (13) which are hinged to two ends of the bottom of the joint mechanism box (11), and a first top frame (14) and a second top frame (15) which are hinged to two ends of the top of the joint mechanism box (11), wherein the joint mechanism box (11) is provided with a locking mechanism (3) for locking the first underframe (12), the second underframe (13), the first top frame (14) and the second top frame (15) in an unfolding or folding state, the first underframe (12) and the second underframe (13) are respectively provided with a support rod (4), the seat group (2) comprises a seat plate (21), one end of the seat plate (21) is rotatably arranged on one support rod (4), the other end of the seat plate is provided with a sleeving groove (211) for sleeving the other support rod (4), and after the first underframe (12) and the second underframe (13) are unfolded and the sleeving groove (211) is sleeved on the supporting rod (4), the seat plate (21) is in a horizontal position.

2. A foldable stroller structure according to claim 1, characterized in that the seat assembly (2) further comprises a backrest (22) folded on the seat plate (21), the backrest (22) is hinged to one end of the seat by a hinge (23), and a positioning surface (221) is provided at one end of the backrest (22) close to the hinge (23), the positioning surface (221) abuts against the surface of the seat when the backrest (22) is unfolded to the maximum angle, and the backrest (22) abuts against the surface of the seat when the backrest (22) is folded.

3. A foldable stroller structure according to claim 1, wherein said first base frame (12), said second base frame (13), said first top frame (14) and said second top frame (15) are U-shaped frames, said joint mechanism boxes (11) are provided in two numbers, and said joint mechanism boxes (11) are respectively connected to two ends of each U-shaped frame.

4. The foldable stroller structure of claim 1, wherein the first top frame (14) and the second top frame (15) are both provided as length-adjustable telescopic frames, and the telescopic structures of the first top frame and the second top frame are identical, the first top frame (14) comprises a fixed rod (141) hinged to the joint mechanism box (11) and a movable frame (142) slidably inserted into the fixed rod (141), and the fixed rod (141) is provided with a fixing component (5) for fixing the movable frame (142) in the fixed rod (141).

5. The folding stroller structure of claim 4, wherein the fixing component (5) comprises a linkage rod (51) hinged on the fixing rod (141), a button (52) arranged at one end of the linkage rod (51), and a limit buckle (53) arranged at the other end of the linkage rod (51), the fixing rod (141) is provided with a containing groove (1411) for containing the linkage rod (51), a plurality of gear grooves (1421) are arranged on the surface of the movable frame (142) close to the accommodating groove (1411) in an array manner, the linkage rod (51) is hinged in the accommodating groove (1411), and a torsion spring (54) is arranged on the rotating shaft of the linkage rod (51), when the torsion spring (54) is not stressed, the button (52) is positioned outside the notch of the accommodating groove (1411) far away from the movable frame (142), the limiting buckle (53) is positioned outside the notch of the accommodating groove (1411) close to the movable frame (142), is inserted and limited in the gear groove (1421).

6. A foldable stroller arrangement according to claim 4, characterized in that said first (12) and second (13) chassis are provided as telescopic frames in accordance with the telescopic configuration of the first (14) top frame.

7. The foldable stroller structure of claim 1, further comprising two caster assemblies (6), wherein the two caster assemblies (6) are detachably mounted on the first chassis (12) and the second chassis (13), respectively, the caster assemblies (6) comprise a sleeve frame (61) and rollers (62) disposed at two ends of the sleeve frame (61), and the sleeve frame (61) is detachably sleeved on the first chassis (12) or the second chassis (13).

8. The foldable stroller structure of claim 7, further comprising two foot pads (7), wherein the two foot pads (7) are detachably mounted on the first chassis (12) and the second chassis (13), the foot pad (7) is provided with a butt-joint groove (71) sleeved on the first chassis (12) or the second chassis (13), and a support block (72) is disposed at the bottom of the foot pad (7).

9. A children's table and chair, characterized in that, comprising the folding stroller structure of any one of claims 1 to 8, further comprising a table board (8), wherein the edge of the table board (8) is provided with a clamping groove (81), and the clamping groove (81) is detachably sleeved with the first top frame (14).

10. A child's cot, comprising the foldable stroller structure of any one of claims 1 to 8, wherein the first top frame (14) and the second top frame (15) are both on the same horizontal line when the locking mechanism (3) is locked, and further comprising a hammock (9), wherein the bottom of the edge of the hammock (9) is provided with an engaging groove (91), and the hammock (9) is provided with a position-giving opening (92) at the position of the joint mechanism box (11), and the engaging groove (91) is detachably sleeved on the first top frame (14) and the second top frame (15).

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