Baby trailer with frame convenient to fold

Abstract

The invention discloses a baby trailer with a frame convenient to fold. The baby trailer comprises a frame set, a push rod and a bottom plate. A plurality of wheels are arranged at the bottom of the frame group, the frame group is divided into a first frame and a second frame, the first frame is pivotally connected with the second frame, and a first locking piece is arranged between the first frame and the second frame; and linkage unlocking of the push rod and the frame is achieved, so that unlocking cannot be conducted for multiple times during folding and unfolding, and folding and unfolding by a user are simplified.

Description

Technical Field

[0001] The present invention relates to the field of trailers for infants and young children, and particularly to a baby trailer that facilitates folding of the frame. Background Art

[0002] The current new trailers mainly have fences arranged around the frame. Two babies sit on the frame, and the fences around can ensure the safety of the babies. The current folding method of baby trailers is mainly individual folding, that is, the frame is folded individually and the handle is folded individually. In this way, both folding and unfolding require multiple steps, which is rather troublesome. Now, a linkage folding method is needed, so that when folding and unfolding, the user can operate simply.

[0003] Patent number: 202420077085.2, patent name: A trailer-type stroller with a reversible seat. The above patent discloses that the frame body (1) includes a first frame group (11), a second frame group (12) symmetrically arranged with the first frame group (11), and a locking mechanism (13) for keeping the first frame group (11) and the second frame group (12) in an unfolded or folded state. The above patent discloses that the first frame group (11) and the second frame group (12) are rotatably connected through the locking mechanism (13), and the folding of the first frame group (11) and the second frame group (12) is completed by unlocking the locking mechanism (13); the above patent also discloses that the push rod assembly 500 swings and adjusts its position independently, and at the same time, the push rod assembly 500 is folded independently, and the push rod assembly 500 cannot realize linkage folding with the frame. Summary of the Invention

[0004] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a baby trailer that facilitates folding of the frame, which is convenient to realize the linkage folding of the push handle and the frame, and simplifies the folding and unfolding of the trailer through linkage folding.

[0005] To achieve the above object, the solution of the present invention: A baby trailer that facilitates folding of the frame, including a frame group, a push rod and a bottom plate; A plurality of wheels are provided at the bottom of the frame group. The frame group is divided into a first frame and a second frame, and the first frame and the second frame are pivotally connected. A first locking member is provided between the first frame and the second frame; The bottom of the push rod is installed with a rotating seat by means of pivotal connection. The rotating seat is installed on the frame group. A first unlocking member that slides on the rotating seat is provided in the rotating seat. A first driving member for pushing the first unlocking member to slide is provided on the push rod. The first unlocking member is connected and linked with the first locking member. When the push rod rotates, the first driving member pushes the first unlocking member to slide, and the first unlocking member pulls the first locking member to unlock the first frame and the second frame; A bottom plate is installed on the frame assembly, and a sealing plate detachably connected to the bottom plate is provided on the bottom plate; The first frame and the second frame are both provided with oppositely arranged handrails through a pivotal connection at the top, a backrest is provided between the handrails, and a backrest is provided on the first frame and the second frame through a pivotal connection.

[0006] Preferably, a first limit piece is installed at the first frame end, and a second limit piece is installed at the second frame end. The first limit piece is pivotally connected to the second limit piece. A locking groove is opened on the first limit piece, and a guide groove for the first locking piece to be embedded in the second limit block. The first locking piece slides in the guide groove, and a first elastic component is arranged between the guide groove and the first locking piece. The first elastic component pushes the first locking piece into the locking groove, and the first locking piece extends into the locking groove to complete the locking.

[0007] Preferably, a limiting notch is opened on the first limiting member and the limiting notch is located below the locking groove, and a boss is provided on the second limiting member, and the bottom of the limiting notch is engaged with the boss. When the first locking member extends into the locking groove, the first locking member and the boss lock the rotating member.

[0008] Preferably, a groove body is opened on the rotating seat, a push rod is embedded in the groove body, the push rod rotates in the groove body of the rotating seat, an arc-shaped guide groove is opened on the inner wall of the groove body, a locking groove is arranged on the inner groove wall of the arc-shaped guide groove, an embedding groove is arranged at the bottom of the push rod, a locking block is embedded in the embedding groove, a locking column is arranged on the locking block, the locking column passes through the push rod and extends into the arc-shaped guide groove, the locking column and the locking block are lifted and lowered in conjunction, a second elastic component for pressing the locking block downward is arranged between the embedding groove and the locking block, when the locking column moves to the position of the locking groove along the arc-shaped guide groove, the locking column is directly inserted into the locking groove to complete the locking and limit the swing of the push rod.

[0009] Preferably, a retractable second locking member is provided at one end of the closing plate facing the base plate, a slot for inserting the second locking member is opened on the base plate, a first operating member for operating the second locking member to retract or extend the second locking member is installed on the second locking member, the second locking member is operated by the first operating member to retract or protrude the closing plate, and the closing plate is pivotally connected to the frame assembly.

[0010] Preferably, a third locking piece is provided on both sides of the backrest, and a locking hole for the third locking piece to extend into is opened on the armrest, and the third locking piece extends into the locking hole to complete the locking, and a second operating piece is installed on the backrest, and the second operating piece is connected to the third locking piece. The third locking piece is operated by the second operating piece to withdraw or extend into the locking hole, thereby realizing the unlocking and locking of the armrest and the backrest.

[0011] Preferably, a first buckle is provided at the bottom of the armrest, and a second buckle is provided on the frame group. The first buckle and the second buckle are engaged with each other. A first guide groove and a first guide block are respectively provided on the first buckle and the second buckle. The first guide block is embedded in the first guide groove for sliding. A third elastic component is embedded in the first guide groove, and both ends of the third elastic component are respectively abutted against the first guide groove and the first guide block. When the first guide block slides, the first guide block presses the third elastic component, swings the armrest inward and presses it on the bottom plate.

[0012] Preferably, an auxiliary groove is formed in the first buckle, and an auxiliary block that is snapped into the auxiliary groove is provided on the second buckle, so as to limit the swing angle of the armrest.

[0013] Preferably, at least one set of mounting frames is provided on the frame group, a fixing seat is mounted on the frame group, the fixing seat is pivotally connected to the mounting frame, a locking module is provided between the fixing seat and the mounting frame, and a unlocking member is provided on one side of the fixing seat. The locking module is unlocked by pressing the unlocking member.

[0014] Preferably, first rotating members are provided on both sides of the backrest, a second rotating member is mounted on the frame group, the first rotating members and the second rotating member are rotationally matched, a second guide groove is formed in the first rotating member, and a second guide block is provided on the second rotating member. The second guide block slides in the second guide groove, thereby limiting the swing angle of the backrest.

[0015] Compared with the prior art, the advantages of the present invention are as follows: The linkage unlocking of the push rod and the frame is realized, so that it is impossible to unlock multiple times during folding and unfolding, and the operation of the user during folding and unfolding is simplified.

[0016] After the trailer is folded, the trailer can be pushed or pulled to move, which is convenient for carrying.

[0017] A swingable sealing plate is provided at the hollow part of the bottom plate, which is convenient for the baby to sit and sleep.

[0018] A mounting frame is provided on the trailer, and a bag body can be mounted on the mounting frame, so as to form a storage space. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a perspective view of the present invention.

[0020] Figure 2 is a front view of the present invention.

[0021] Figure 3 is a schematic diagram of the rotating seat, push rod and locking column of the present invention.

[0022] Figure 4Schematic diagram of the unfolding and combination of the first limiting block and the second limiting block of the present invention.

[0023] Figure 5 Stereoscopic view of the second limiting block of the present invention.

[0024] Figure 6 Schematic diagram of the backrest and the armrest of the present invention.

[0025] Figure 7 Schematic diagram of the third locking member and the locking hole of the present invention.

[0026] Figure 8 Schematic diagram of the connection between the backrest and the armrest of the present invention.

[0027] Figure 9 Schematic diagram of the first buckle member and the second buckle member of the present invention.

[0028] Figure 10 Schematic diagram of the first rotating member and the second rotating member of the present invention.

[0029] Figure 11 Schematic diagram of the sealing plate of the present invention.

[0030] Figure 12 Schematic diagram of the bottom of the sealing plate of the present invention.

[0031] Figure 13 Schematic diagram of the bottom plate of the present invention.

[0032] Figure 14 Schematic diagram of the folded frame group of the present invention.

[0033] Figure 15 Schematic diagram of the frame group of the present invention provided with an installation frame.

[0034] Figure 16 Schematic diagram of the installation frame of the present invention.

[0035] Figure 17 Schematic diagram of the locking module of the invention.

[0036] Among them, 1. Frame group, 2. Push rod, 3. Bottom plate, 4. Wheels, 5. First frame, 6. Second frame, 7. First locking member, 8. Rotating seat, 9. First unlocking member, 10. First chute, 11. First driving member, 13. Sealing plate, 14. Armrest, 15. Backrest, 16. First limiting member, 17. Second limiting member, 18. Locking groove, 19. Guide groove, 20. First elastic component, 21. Limiting notch, 22. Boss, 23. Groove body, 24. Arc-shaped guide groove, 25. Locking slot, 26. Embedding slot, 27. Locking block, 28. Locking column, 29. Second elastic component, 30. Second locking member, 31. Slot, 32. First operating member, 33. Third locking member, 34. Locking hole, 35. Second operating member, 36. First buckling member, 37. Second buckling member, 38. First guide groove, 39. First guide block, 40. Third elastic component, 41. Auxiliary groove, 42. Auxiliary block, 43. First rotating member, 44. Second rotating member, 45. Second guide groove, 46. Second guide block, 47. Installation frame, 48. Fixed seat, 49. Locking module, 50. Unlocking member, 51. Fourth elastic component, 52. Collar. Detailed implementation mode

[0037] Now, in combination with the accompanying drawings, the present invention will be further described.

[0038] As Figure 1-17 described, a baby trailer facilitating the folding of the frame includes a frame group 1, a push rod 2 and a bottom plate 3; Four wheels 4 are installed at the bottom of the frame group 1. The frame group 1 moves through the wheels 4. The frame group 1 is divided into a front first frame 5 and a rear second frame 6 which are pivotally connected. A first locking member 7 is arranged between the first frame 5 and the second frame 6. The first locking member extends into the first frame 5 and the second frame 6, thus completing the locking of the first frame 5 and the second frame 6 and preventing relative rotation between the first frame 5 and the second frame 6. When the first locking member 7 unlocks the first frame 5 and the second frame 6, the first frame 5 and the second frame 6 are folded; The bottom of the push rod 2 is installed with a rotating seat 8 by a pivot connection, and the rotating seat 8 is installed on the second frame 6 of the frame group 1 by bolt fastening. A first slide groove 10 is opened on the rotating seat 8, and a first unlocking member 9 that translates in the first slide groove 10 is embedded in the first slide groove 10. A spring is embedded in the first slide groove 10, and both ends of the spring are against the rear end surface of the first slide groove 10 and the rear end surface of the first unlocking member 9. A first active member 11 for pushing the first unlocking member 9 to slide is provided on the push rod 2, and the first active member 11 is a push rod. The push block is integrally formed with the push rod 2. When the push rod 2 swings counterclockwise, the first active member 11 extends into the first slide groove 10 and presses the first slider backward, the first slider moves backward, the first locking member 7 is fixed to one end of the cable, and the other end of the cable passes through the first slide groove 10 and is fixed to the first slider. When the first slider moves backward, the first unlocking member 9 pulls the first locking member 7 out of the first frame 5, so that the first frame 5 and the second frame 6 are unlocked, and the first frame 5 and the second frame 6 can be folded; A bottom plate 3 is installed on the first frame 5 and the second frame 6 by bolt fastening, and a cover plate 13 detachably connected to the bottom plate 3 is arranged between the two bottom plates 3. When the cover plate 13 and the bottom plate 3 are removed, the area between the two bottom plates 3 is hollowed out, and a protective bag (not shown) can be fixed in the hollowed-out area between the bottom plates 3 at both ends by bolt fastening, so as to protect the baby's feet from contacting the ground when the baby falls backwards; The first frame 5 and the second frame 6 are both provided with armrests 14 arranged opposite to each other on the top thereof by means of a pivotal connection, a backrest 15 is provided between the armrests 14, and the backrest 15 is provided on the first frame 5 and the second frame 6 by means of a pivotal connection, so that a fence is formed by the backrest 15 and the armrest 14, and a gap is formed at the interval between the armrests 14 of the first frame 5 and the second frame, so that it is convenient for babies to get on and off the vehicle.

[0039] A first limiting member 16 is installed at the end of the first vehicle frame 5. One end of the first limiting member 16 is inserted into the first vehicle frame 5, and the first limiting member 16 is fixed to the first plug-in part by bolts. A second limiting member 17 is installed at the end of the second vehicle frame 6. One end of the docking seat is inserted into the second vehicle frame 6, and the second limiting member 17 is locked in the second vehicle frame 6 by bolts. The first limiting member 16 and the second limiting member 17 are pivotally connected (a notch is formed in the second limiting member 17 for the first limiting member 16 to extend into, and the first limiting member 16 is snapped into the notch of the second limiting member 17. A rotating shaft passes through the first limiting member 16 and the second limiting member 17, so that the first limiting member 16 and the second limiting member 17 are rotatably connected. Due to the first limiting member 16 and the second limiting member 17 provided at the ends of the first vehicle frame 5 and the second vehicle frame 6, the first limiting member 16 and the second limiting member 17 are rotatably connected to form a pivotal connection between the first vehicle frame 5 and the second vehicle frame 6). A locking groove 18 is formed at the end of the first limiting member 16 facing the second vehicle frame 6. A guide groove 19 for the first locking member 7 to be inserted into is formed in the second limiting block. The first locking member 7 slides back and forth in the guide groove 19. A first elastic component 20 is embedded in the guide groove 19. The first elastic component 20 is a spring, and the two ends of the spring respectively abut against the rear end of the guide groove 19 and the rear end of the first locking member 7. The first locking member 7 is a sliding pin that slides back and forth in the guide groove 19. The first elastic component 20 pushes the first locking member 7 into the locking groove 18, and the first locking member 7 extends into the locking groove 18 to complete the locking. When working, when the push rod 2 swings counterclockwise and fits with the bottom plate 3, the first driving member 11 presses and retracts the first slider. The first slider pulls the first locking member 7 back through a cable, so that the first locking member 7 withdraws from the locking groove 18 of the first limiting member 16. The first limiting member 16 loses its limit, and the first limiting member 16 and the second limiting member 17 can rotate relative to each other, so that folding can be carried out. When the vehicle frame is unfolded, when the first vehicle frame 5 and the second vehicle frame 6 are unfolded and located on the same horizontal plane, the push rod 2 is swung clockwise. The first slider loses the pressing of the first driving member 11. The spring pushes the first slider forward. The cable loses traction. The first elastic component 20 pushes the first locking member 7 forward and extends into the locking groove 18 of the first limiting member 16, so as to complete the locking of the first vehicle frame 5 and the second vehicle frame 6.

[0040] A limiting notch 21 is formed at one end of the first limiting member 16 facing the second vehicle frame 6, and the limiting notch 21 is located below the locking groove 18. A boss 22 is fixedly provided on the second limiting member 17 by an integral molding method. The bottom of the limiting notch 21 is engaged with the boss 22. When the first locking member 7 extends into the locking groove 18, the first locking member 7 and the boss 22 lock the first limiting member 16. When the vehicle frame is unfolded, when the limiting notch 21 of the first limiting member 16 presses on the top of the convex block, the first vehicle frame 5 and the second vehicle frame 6 are in a horizontal state, the first locking member 7 is opposite to the locking groove 18, and the first locking member 7 is pushed into the locking groove 18 by the first elastic component 20 to complete the locking. When the vehicle frame group 1 bears weight, the first vehicle frame 5 and the second vehicle frame 6 will collapse downward in the middle. If there is no limiting notch 21 and boss 22, the downward collapsing force acts on the first locking member 7. Since the first locking member 7 is a movable member, the stability of the vehicle frame group 1 is poor. When the limiting notch 21 and the boss 22 are provided, the downward collapsing force acts on the limiting notch 21 and the boss 22. Since the limiting notch 21 and the boss 22 are not fixed members, the stability is strong. By providing the limiting notch 21 and the boss 22, when the vehicle frame group 1 is unfolded, the first vehicle frame 5 and the second vehicle frame 6 are on the same plane, and there is no need for manual alignment when the vehicle frame group 1 is unfolded; one end of the first locking member 7 extending into the locking groove 18 is a slope. When the first vehicle frame 5 and the second workshop are not unfolded, but the push rod 2 has rotated clockwise and unfolded, the first locking member 7 will extend into the limiting notch 21. If one end of the first locking member 7 extending into the locking groove 18 is not a slope, the first vehicle frame 5 and the second vehicle frame 6 cannot be unfolded. When one end of the first locking member 7 extending into the locking groove 18 is a slope, the limiting notch 21 presses on the slope of the first locking member 7. When the first limiting block rotates, the limiting notch 21 slides along the slope, so that the first locking member 7 is pressed into the guide groove 19. When the first locking member 7 is opposite to the locking groove 18, the first locking member 7 extends into the locking groove 18 to complete the locking.

[0041] A downward concave groove body 23 is formed in the rotating seat 8, and a push rod 2 is embedded in the groove body 23. One end of the push rod 2 embedded in the groove body 23 of the rotating seat 8 is a cylindrical head. Shafts are fixed to the left and right ends of the push rod 2 by welding. The shafts pass through the rotating seat 8, so that the push rod 2 rotates in the groove body 23 of the rotating seat 8. Arc-shaped guiding grooves 24 are formed in the inner side walls on both sides of the groove body 23, and locking grooves 25 are formed in the inner groove walls of the arc-shaped guiding grooves 24. There are two locking grooves 25. One locking groove 25 is located at the front end of the arc-shaped guiding groove 24, and the other locking groove 25 is located in the middle section of the arc-shaped guiding groove 24. An embedding groove 26 extending upward is formed at the bottom of the push rod 2, and a locking block 27 is embedded in the embedding groove 26. The locking block 27 moves up and down in the embedding groove 26. Locking columns 28 passing through the push rod 2 and extending into the arc-shaped guiding groove 24 are fixed to the left and right ends of the locking block 27 by means of bolt fastening. Waist-shaped holes for the locking columns 28 to move up and down are formed on the outer wall of the push rod 2. The locking columns 28 and the locking block 27 are linked to move up and down. A second elastic component 29 for pressing the locking block 27 downward is arranged between the embedding groove 26 and the locking block 27. The second elastic component 29 is a spring. The top of the second elastic component 29 abuts against the inner top of the embedding groove 26, and the bottom of the second elastic component 29 abuts against the locking block 27. In this way, the second elastic component 29 presses the locking block 27 downward. When the locking column 28 moves to the position of the locking groove 25 along the arc-shaped guiding groove 24, the locking column 28 and the locking block 27 descend together, and the locking column 28 is directly clamped into the locking groove 25 to complete locking and limit the swing of the push rod 2. The push rod 2 of the present application has three states: First, the folding state. When the push rod 2 is rotated counterclockwise and the push rod 2 approaches the bottom plate 3, the locking column 28 is clamped into the locking groove 25 at the frontmost end of the arc-shaped concave groove, so that the first vehicle frame 5 and the second vehicle frame 6 are unlocked. The push rod 2 is erected, so that the second vehicle frame 6 is erected, and the first vehicle frame 5 approaches the second vehicle frame 6 under the action of gravity, thus completing folding. The tires of the second vehicle frame 6 touch the ground, so that the user can push the folded vehicle frame to move. When unfolding, only need to lower the push rod 2, so that the first vehicle frame 5 unfolds with the second vehicle frame 6 under its own gravity, and then the locking column 28 disengages from the locking groove 25, and the push rod 2 rotates clockwise, and the first locking member 7 extends into the locking groove 18 to complete locking. Second, the pushing state. The locking column 28 moves to the position of the locking groove 25 in the middle section, and the locking column 28 is clamped into the locking groove 25, so that the position of the push rod 2 is locked, and the push rod 2 can push the vehicle frame group 1 to move. Third, the pulling state. Since pulling is the traction force, there is no need to lock the position of the push rod 2, and the locking column 28 moves to the rearmost end of the arc-shaped guiding groove 24.

[0042] To facilitate pulling up the lock block 27 to unlock it, a grip is fixed to the top of the push rod 2 by bolts. A collar 52 that moves up and down on the push rod 2 is sleeved on the push rod 2 near the grip. A pull rope is fixed to the collar 52 by bolts, and the other end of the pull rope is fixed to the lock block 27. By raising the collar 52, the lock block 27 is pulled up, so that the lock post 28 disengages from the lock groove 25 and the push rod 2 can swing freely.

[0043] A second locking member 30 capable of telescoping is provided at one end of the sealing plate 13 facing the bottom plate 3. An installation groove is formed at one end of the sealing plate 13 facing the bottom plate 3, and the second locking member 30 is inserted into the installation groove for telescoping. A spring is inserted into the installation groove, and the spring abuts against one end of the second locking member 30 extending into the installation groove. In this way, the spring pushes the second locking member 30 outwards. A slot 31 for the second locking member 30 to insert is formed at one end of the bottom plate 3 facing the sealing plate 13. When the second locking member 30 extends out of the installation groove, the second locking member 30 extends into the slot 31 to complete the locking of the sealing plate 13 and the bottom plate 3. A first operating member 32 for operating the telescoping of the second locking member 30 is installed on the second locking member 30 by means of bolting. An oblong hole for the first operating member 32 to extend out of the installation groove is formed at the bottom of the sealing plate 13. The first operating member 32 is a handgrip. The first operating member 32 translates in the oblong hole at the bottom of the sealing plate 13, so as to realize the translation of the second locking member 30. The second locking member 30 is retracted or protruded from the sealing plate 13 by operating the first operating member 32. The sealing plate 13 is pivotally connected to the frame group 1. The rotating shaft passing through the first limiting member 16 and the second limiting member 17 also passes through the two sealing plates 13. In this way, the sealing plate 13, the first limiting member 16 and the second limiting member 17 rotate coaxially. When the baby needs to lie flat, the sealing plate 13 is swung upwards to lock with the bottom plate 3, and a soft pad (not shown) is stacked on the bottom plate 3 and the sealing plate 13. When the baby needs to sit upright, the bottom plate 3 and the sealing plate 13 are unlocked, and the sealing plate 13 naturally hangs down under its own gravity. In this way, the area between the two bottom plates 3 is hollowed out, and the baby can sit on the bottom plate 3 and the legs can hang down from the hollowed-out area.

[0044] On both sides of the backrest 15, there are third locking members 33. On the left and right sides of the backrest 15, there are sliding grooves for the third locking members 33 to be embedded. The third locking members 33 are embedded in the sliding grooves. The third locking members 33 are pins. Springs are embedded in the sliding grooves. Then the third locking members 33 are embedded into the sliding grooves. The third locking members 33 abut against the springs. The springs push the third locking members 33 outwards and protrude from both ends of the backrest 15. On the armrest 14, there are locking holes 34 for the third locking members 33 to extend into. The third locking members 33 extend into the locking holes 34 to complete the locking. On the back surface of the backrest 15, there is a second operating member 35. On the back surface of the backrest 15, there is a groove 23 extending upwards. The second operating member 35 is clamped in the groove 23 on the back surface of the backrest 15. The second operating member 35 moves up and down in the groove 23 on the back surface of the backrest 15. A spring is fixed between the groove 23 on the back surface of the backrest 15 and the second operating member 35. The spring presses the second operating member downwards. The second operating member 35 and the third locking member 33 are connected by a cable. Both ends of the cable are fixed to the second operating member 35 and the third locking member 33 by means of bolts. When the second operating member 35 is pressed upwards, the cable pulls the third locking member 33 to retract into the backrest 15. In this way, the third locking member 33 is separated from the locking hole 34. By operating the second operating member 35, the third locking member 33 is withdrawn or extended into the locking hole 34. In this way, the unlocking and locking of the armrest 14 and the backrest 15 are realized. When the armrest 14 and the backrest 15 are unlocked, the backrest 15 is swung downwards to fit with the bottom plate 3, and the armrest 14 is swung downwards to press the backrest 15; a downwardly concave groove is formed on the outer side surface of the backrest 15. On the inner side surface of the armrest 14, there is a clamping block fixed by integral molding and clamped into the groove. When the backrest 15 and the armrest 14 are spliced, it prevents the armrest 14 from swinging outwards and ensures the stability of the enclosure structure.

[0045] A first buckle member 36 is fixed to the bottom of the armrest 14 by means of bolting. A second buckle member 37 is fixed to the vehicle frame group 1 by means of the bolts passing through. The first buckle member 36 and the second buckle member 37 are engaged with each other to form a joint capable of relative rotation. A first guiding groove 38 and a first guiding block 39 are respectively arranged on the first buckle member 36 and the second buckle member 37. The first guiding groove 38 is formed on the first buckle member 36 and is an arc-shaped groove. The second buckle member 37 is integrally formed with a first guiding block 39 extending into the first guiding groove 38. The first guiding block 39 is embedded into the first guiding groove 38 for sliding. A third elastic component 40 is embedded in the first guiding groove 38. The third elastic component 40 is a spring. Two ends of the third elastic component 40 respectively abut against the first guiding groove 38 and the first guiding block 39. When the first guiding block 39 slides, the first guiding block 39 squeezes the third elastic component 40, swinging the armrest 14 inward and pressing it against the bottom plate 3. When unfolding, the armrest 14 swings outward, and the first guiding block 39 compresses the third elastic component 40. When folding, since the third elastic component 40 is compressed, the third elastic component 40 pushes the first guiding block 39 to slide in the first guiding groove 38, forcing the armrest 14 to swing inward and press against the backrest plate 15, thus avoiding the armrest 14 and the backrest plate 15 from spreading out during folding.

[0046] An arc-shaped auxiliary groove 41 is formed on the first buckle member 36. The second buckle member 37 is integrally formed with an auxiliary block 42 engaged with the auxiliary groove 41. The auxiliary block 42 slides in the auxiliary groove 41 to limit the swinging angle of the armrest 14, avoiding the armrest 14 from swinging outward excessively and separating from the backrest plate 15, ensuring the stability of the armrest 14 and the backrest plate 15, and at the same time providing a relatively large seating space and storage space.

[0047] First rotating members 43 are fixed to both left and right sides of the backrest plate 15 by means of bolting. Second rotating members 44 are installed on the vehicle frame group 1 by means of bolting. The first rotating members 43 and the second rotating members 44 are rotationally matched to form joints. Arc-shaped second guiding grooves 45 are formed on the first rotating members 43. The second rotating members 44 are integrally formed with second guiding blocks 46. The second guiding blocks 46 slide in the second guiding grooves 45 to limit the swinging angle of the backrest plate 15, avoiding the backrest plate 15 from swinging backward. When the backrest plate 15 and the armrest 14 are opened, the backrest plate 15 swings outward. When it cannot swing outward, the third locking member 33 and the locking hole 34 are opposite. Since the baby leans on the backrest plate 15 and the backrest plate 15 cannot swing outward, the stability is strong.

[0048] There are two sets of mounting frames 47 provided on the vehicle frame group 1. The two sets of mounting frames 47 are arranged at the front and rear ends of the vehicle frame group 1. Fixed seats 48 are fixed on the first vehicle frame 5 and the second vehicle frame 6 by means of bolts. The fixed seats 48 and the mounting frames 47 are pivotally connected through joints. A locking module 49 is provided at the joint between the fixed seat 48 and the mounting frame 47. The two joint seats of the joint are respectively fixed on the mounting frame 47 and the fixed seat 48 by means of bolts. Cavities are opened on the two joint seats, and internal tooth grooves are opened on the inner walls of the cavities. The locking module 49 is embedded into the cavities. The locking module 49 is a gear that meshes with the internal tooth grooves. A fourth elastic component 51 that pushes the locking module 49 outwards is embedded in the cavities. The fourth elastic component 51 is a spring. When the gear is stuck on the two joint seats, the joint is locked. When the gear is stuck on one joint seat, the joint can rotate. Due to the use of the gear and the internal tooth grooves, the angle of the mounting frame 47 can be adjusted. An unlocking groove 25 is opened on the outer side of the mounting frame 47. A unlocking member 50 is embedded in the unlocking groove 25. The unlocking member 50 passes through the joint base and abuts against the locking module 49. When the unlocking member 50 is pressed, the unlocking member 50 pushes the inner side of the locking module 49 to move, so that the locking module 49 is separated from the joint seat on the mounting frame 47, and the mounting frame 47 can rotate. When the unlocking member 50 is released, the locking module 49 is pushed outwards under the action of the fourth elastic component 51, so that the locking module 49 is clamped into the joint seat of the mounting frame 47, thus completing the locking; A bag body (not shown in the figure) can be fixed on the mounting frame 47 by bolts, which is convenient for storing items.

[0049] The above embodiments are only for illustration: The described embodiments of the invention are only examples to illustrate the invention and not the only embodiments. The scope of the invention should not be limited thereby: The protection scope of the invention should not be considered limited to this example just because this example is described. Equivalent changes and modifications are still within the scope of the patent: As long as it is a simple equivalent change or modification based on the scope of the patent application and the content of the specification of this invention, it should be considered that it is still within the patent protection scope of this invention.

Claims

1. An infant trailer facilitating the folding of the frame, comprising a frame assembly, a push rod and a bottom plate; A plurality of wheels are provided at the bottom of the frame assembly. The frame assembly is divided into a first frame and a second frame, and the first frame and the second frame are pivotally connected. A first locking member is provided between the first frame and the second frame; It is characterized in that The bottom of the push rod is installed with a rotating seat through a pivotal connection. The rotating seat is installed on the frame assembly. A first unlocking member sliding on the rotating seat is provided in the rotating seat. A first driving member for pushing the first unlocking member to slide is provided on the push rod. The first unlocking member is connected and linked with the first locking member. When the push rod rotates, the first driving member pushes the first unlocking member to slide, and the first unlocking member pulls the first locking member to unlock the first frame and the second frame; A bottom plate is installed on the frame assembly, and a sealing plate detachably connected to the bottom plate is provided on the bottom plate; On the tops of the first frame and the second frame, opposite armrests are installed through pivotal connections. A backrest is provided between the armrests, and the backrest is installed on the first frame and the second frame through pivotal connections.

2. The baby trailer facilitating the folding of the vehicle frame according to claim 1, wherein A first limiting member is installed at the end of the first frame, and a second limiting member is installed at the end of the second frame. The first limiting member and the second limiting member are pivotally connected. A locking groove is formed in the first limiting member. A guiding groove for the first locking member to be inserted into is formed in the second limiting block. The first locking member slides in the guiding groove. A first elastic component is provided between the guiding groove and the first locking member. The first elastic component pushes the first locking member into the locking groove, and the first locking member extends into the locking groove to complete the locking.

3. A baby trailer facilitating the folding of a vehicle frame according to claim 2, characterized in that, A limiting notch is formed in the first limiting member and is located below the locking groove. A convex platform is provided on the second limiting member. The bottom of the limiting notch is engaged with the convex platform. When the first locking member extends into the locking groove, the first locking member and the convex platform lock the rotating member.

4. A baby trailer facilitating folding of a vehicle frame according to claim 1, wherein, A groove body is formed in the rotating seat, and the push rod is embedded in the groove body of the rotating seat. The push rod rotates in the groove body of the rotating seat. An arc-shaped guiding groove is formed in the inner wall of the groove body. A locking groove is formed in the inner groove wall of the arc-shaped guiding groove. An embedding groove is formed at the bottom of the push rod. A locking block is embedded in the embedding groove. A locking column passing through the push rod and extending into the arc-shaped guiding groove is provided on the locking block. The locking column and the locking block are linked to move up and down. A second elastic component pressing the locking block downward is provided between the embedding groove and the locking block. When the locking column moves along the arc-shaped guiding groove to the position of the locking groove, the locking column directly snaps into the locking groove to complete the locking and limit the swing of the push rod.

5. A baby trailer facilitating the folding of a frame according to claim 1, characterized in that, A retractable second locking member is provided at one end of the sealing plate facing the bottom plate. A slot for the second locking member to be inserted into is formed in the bottom plate. A first operating member for operating the second locking member to expand and contract is installed on the second locking member. The second locking member is retracted or protruded from the sealing plate by operating the first operating member. The sealing plate is pivotally connected to the frame assembly.

6. The baby trailer facilitating the folding of the vehicle frame according to claim 1, characterized in that, Third locking members are provided on both sides of the backrest. Locking holes for the third locking members to extend into are formed in the armrests. The third locking members extend into the locking holes to complete the locking. A second operating member is installed on the backrest. The second operating member is connected to the third locking members. The third locking members are withdrawn or extended into the locking holes by operating the second operating member, so as to realize the unlocking and locking of the armrests and the backrest.

7. A baby trailer facilitating folding of a vehicle frame according to claim 1, characterized in that, A first buckle member is provided at the bottom of the armrest, and a second buckle member is provided on the frame group. The first buckle member and the second buckle member are engaged with each other. A first guiding groove and a first guiding block are respectively provided on the first buckle member and the second buckle member. The first guiding block is embedded in the first guiding groove for sliding. A third elastic component is embedded in the first guiding groove, and both ends of the third elastic component are respectively abutted against the first guiding groove and the first guiding block. When the first guiding block slides, the first guiding block presses the third elastic component, swinging the armrest inward and pressing it against the bottom plate.

8. A baby trailer facilitating the folding of a vehicle frame according to claim 7, characterized in that, An auxiliary groove is formed in the first buckle member, and an auxiliary block that is snapped into the auxiliary groove is provided on the second buckle member, thereby limiting the swinging angle of the armrest.

9. A baby trailer facilitating the folding of a vehicle frame according to claim 1, characterized in that, At least one set of mounting frames is provided on the frame group, a fixed seat is mounted on the frame group, the fixed seat is pivotally connected to the mounting frame, a locking module is provided between the fixed seat and the mounting frame, and a unlocking member is provided on one side of the fixed seat. The locking module is unlocked by pressing the unlocking member.

10. A baby trailer facilitating the folding of a vehicle frame according to claim 1, characterized in that, First rotating members are provided on both sides of the backrest, a second rotating member is mounted on the frame group, the first rotating members and the second rotating member are rotationally matched, a second guiding groove is formed in the first rotating members, and a second guiding block is provided on the second rotating member. The second guiding block slides in the second guiding groove, thereby limiting the swinging angle of the backrest.

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