Baby trailer with frame convenient to fold

Abstract

The utility model discloses a baby trailer convenient for folding a frame, which comprises a frame group, a push rod and a fence, the fence is rotatably connected with the frame, a plurality of wheels are arranged at the bottom of the frame group, a bottom plate is mounted on the frame group, one end of the frame group is pivotally connected with the push rod, and the other end of the frame group is pivotally connected with the push rod. The frame assembly comprises a first frame and a second frame, the first frame is connected with the second frame in a pivoted mode, a locking piece is arranged at the pivoted connection position of the two frames, the two frames are locked through the locking piece, an unlocking piece capable of sliding is arranged at the pivoted connection position of the frames and the push rod, and the unlocking piece and the locking piece are connected and linked. When the push rod swings and is folded, the unlocking piece is driven to move, and the unlocking piece drives the locking piece to move for unlocking; and linkage unlocking of the push rod and the frame is achieved, so that unlocking cannot be conducted for multiple times when folding and unfolding are conducted, and folding and unfolding are simplified when a user conducts folding and unfolding.

Description

Technical Field

[0001] This utility model relates to the field of infant trailers, specifically to an infant trailer with a foldable frame. Background Technology

[0002] Modern baby trailers typically have railings around the frame, allowing two babies to sit safely. Current folding methods involve separate folding of the frame and handles, requiring multiple steps and making folding and unfolding cumbersome. A more streamlined folding mechanism is needed, simplifying the process for users.

[0003] Patent No.: 202420077085.2, patent name is a trailer stroller with 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) unfolded or folded. The above patent discloses that the first frame group (11) and the second frame group (12) are rotatably connected by 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 the push rod assembly 500 folds independently. The push rod assembly 500 cannot achieve linkage with the folding of the frame. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model proposes a baby stroller with a foldable frame, which facilitates the linkage folding of the push handle and the frame, simplifying the folding and unfolding of the stroller.

[0005] To achieve the above objectives, the present invention provides the following solution: a baby stroller with a foldable frame, comprising a frame assembly, a push rod, and a guardrail, wherein the guardrail is rotatably connected to the frame, multiple wheels are provided at the bottom of the frame assembly, and a base plate is installed on the frame assembly, wherein one end of the frame assembly is pivotally connected to the push rod, and the frame assembly comprises a first frame and a second frame, wherein the first frame and the second frame are pivotally connected.

[0006] A locking element is provided at the pivot connection between the two sets of frames, and the two sets of frames are locked by the locking element. A sliding unlocking element is provided at the pivot connection between the frame and the push rod. The unlocking element is connected and linked with the locking element. When the push rod swings and folds, it drives the unlocking element to move, and the unlocking element drives the locking element to move to unlock.

[0007] Preferably, a rotating seat is installed on the frame assembly, the push rod is pivotally connected to the rotating seat, the push rod cylinder rotating seat is pivotally connected to the frame, the rotating seat has a sliding groove, an unlocking component that slides in the sliding groove is provided in the sliding groove, and a push block is installed on the push rod. When the push rod rotates, the push block presses the unlocking component to unlock.

[0008] Preferably, a telescopic locking member is installed at the upper end of the first frame, and a locking groove is provided in the second frame for the locking pin to be inserted into. A first elastic component is provided between the locking member and the first frame. The locking member is pushed out of the first frame and inserted into the second locking groove by the first elastic component to complete the locking of the first frame and the second frame.

[0009] Preferably, a rotating component is installed on the second frame, and a docking seat is inserted into the first frame. The rotating component is rotatably connected to the docking seat. The first frame and the second frame pivot through the rotatable connection between the rotating component and the docking seat. The locking groove is provided on the rotating component, and a limiting groove for the locking component to slide is provided on the docking seat. A first elastic component is provided in the limiting groove to push the locking component into the locking groove.

[0010] Preferably, a limiting notch is provided on the rotating part and the limiting notch is located below the locking groove. A boss is provided on the mating seat. The bottom of the limiting notch fits with the boss. When the locking part extends into the locking groove, the locking part and the boss lock the rotating part. The end of the locking part that extends into the limiting groove is a slope.

[0011] Preferably, the rotating base has an arc-shaped hole, and multiple locking grooves are formed on the rotating base, with the multiple locking grooves arranged on the periphery of the arc-shaped hole. An embedding groove is formed at the bottom of the push rod, and a locking block that can move up and down along the push rod is embedded in the embedding groove. A second elastic component that presses the locking block downward is provided between the embedding groove and the locking block. Locking pins are provided on both sides of the locking block, and the locking pins pass through the push rod and extend into the arc-shaped hole. An oblong hole for the locking pins to move up and down is formed on the outer wall of the push rod. A handle is provided at the top of the push rod, and a traction component that pulls the locking block upward is provided between the push rod and the handle.

[0012] Preferably, the middle section of the base plate is hollowed out to allow the baby to hang down. A detachable cover plate is provided in the hollowed-out part of the base plate. There are two cover plates, and one end of each cover plate is rotatably connected to the frame assembly. The cover plates, the first frame, and the second frame rotate coaxially. An insert is inserted into the end of the cover plate. The base plate is provided with a slot for the insert to extend into. A first operating component is installed below the cover plate and fixed to the insert. The extension and retraction of the insert is achieved through the first operating component.

[0013] Preferably, the enclosure includes handrails and backrests. The backrests are mounted on the first and second frames by a rotatable connection. Handrails are mounted on the frames on both sides of each backrest by a rotatable connection. A compression spring is provided between the handrails and the frames to press the handrails against the base plate. A locking pin is provided on the backrest and inserted into the handrail. A locking hole is provided on the handrail for the locking pin to be inserted into. The locking pin is inserted into the locking hole to lock the handrail and the backrest. The locking pin can extend and retract within the backrest. A second operating element connected to the locking pin is installed on the backrest.

[0014] Preferably, the armrests and backrests are rotatably connected to the frame assembly via joints. An arc-shaped guide groove is opened in one of the joint seats of each joint, and a guide block extending into the guide groove is fixed on the other joint seat of each joint. This limits the angle at which the armrests and backrests swing outward. A third elastic component is embedded in the guide groove.

[0015] Preferably, the frame assembly is equipped with a basket mounting frame, which is rotatably connected to the frame. A locking module is provided between the basket mounting frame and the frame to lock the basket mounting frame. When the locking module is pressed, the basket mounting frame is unlocked and rotated and folded.

[0016] Compared with the prior art, the advantages of this utility model are:

[0017] The push rod is linked to the frame for unlocking, which prevents multiple unlocking attempts during folding and unfolding, simplifying the folding and unfolding process for users.

[0018] The trailer can be folded and moved by pushing or pulling, making it easy to carry.

[0019] The perforated part of the base plate has a swingable cover, making it easy for the baby to sit or sleep. Attached Figure Description

[0020] Figure 1 This is a perspective view of Embodiment 1 of the present utility model.

[0021] Figure 2 This is a top view of Embodiment 1 of the present utility model.

[0022] Figure 3 This is a cross-sectional view of Embodiment 1 of the present utility model.

[0023] Figure 4 This is a folding diagram of Embodiment 1 of the present utility model.

[0024] Figure 5 This is a schematic diagram of the rotating seat and push rod in Embodiment 1 of this utility model.

[0025] Figure 6This is a schematic diagram of the rotating base, push rod, and unlocking component according to Embodiment 1 of this utility model.

[0026] Figure 7 This is a schematic diagram of the locking block and the embedded groove in Embodiment 1 of this utility model.

[0027] Figure 8 This is a perspective view of the frame and push rod of Embodiment 1 of this utility model.

[0028] Figure 9 This is a schematic diagram of the rotating component and the docking seat in Embodiment 1 of this utility model.

[0029] Figure 10 This is a schematic diagram of the docking seat and locking member in Embodiment 1 of this utility model.

[0030] Figure 11 This is a cross-sectional view of the joint between the backrest and the armrest in Embodiment 1 of this utility model.

[0031] Figure 12 This is a schematic diagram of the backrest, armrest, and locking pin of Embodiment 1 of this utility model.

[0032] Figure 13 This is a schematic diagram of the back of the backing plate in Embodiment 1 of this utility model.

[0033] Figure 14 This is a schematic diagram of the connection between the backrest and the handrail in Embodiment 1 of this utility model.

[0034] Figure 15 This is a schematic diagram of the sealing plate and the vehicle frame in Embodiment 2 of this utility model.

[0035] Figure 16 This is a perspective view of the sealing plate and the vehicle frame in Embodiment 2 of this utility model.

[0036] Figure 17 This is a cross-sectional view of the sealing plate in Embodiment 2 of this utility model.

[0037] Figure 18 This is a schematic diagram of the base plate in Embodiment 2 of this utility model.

[0038] Figure 19 This is a perspective view of Embodiment 3 of the present invention.

[0039] Figure 20 This is a perspective view of the basket mounting frame in Embodiment 3 of this utility model.

[0040] Figure 21 This is a schematic diagram of the rotating connection between the basket mounting frame and the fixed base in Embodiment 3 of this utility model.

[0041] Figure 22 This is a schematic diagram of the rotating connection part of the handrail frame in Embodiment 1 of this utility model.

[0042] Figure 23 This is a schematic diagram of the rotating connection between the backrest and the frame in Embodiment 1 of this utility model.

[0043] The components include: 1. Frame assembly; 2. Push rod; 3. Enclosure; 4. Locking component; 5. Unlocking component; 6. Rotating seat; 7. Slide groove; 8. Push block; 9. Locking groove; 11. Cable; 12. Rotating component; 13. Connecting seat; 14. Limiting groove; 15. First elastic component; 16. Limiting notch; 17. Boss; 18. Arc-shaped hole; 19. Locking groove; 20. Embedding groove; 21. Locking block; 22. Second elastic component; 23. Locking post; 24. Handle; 25. Traction component; 26. Base plate. 7. Sealing plate, 28. Translation spring, 29. Insert, 30. Slot, 31. First operating component, 32. Handrail, 33. Backrest, 34. Locking pin, 35. Second operating component, 36. Basket mounting frame, 37. Fixing seat, 38. Second frame, 39. First frame, 40. Joint, 41. Guide groove, 42. Guide block, 43. Third elastic component, 44. Unlocking groove, 45. Second rotating head, 46. Pressing block, 47. Abutment block, 48. Locking module, 49. Slider. Detailed Implementation

[0044] The present invention will now be further described with reference to the accompanying drawings.

[0045] Example 1: As Figure 1-13 As shown in Figures 22-23, a baby stroller with a frame 1 that is easy to fold includes a frame 1, a push rod 2, and a guardrail 3. The guardrail 3 is rotatably connected to the frame 1. One end of the frame 1 is pivotally connected to the push rod 2. The frame 1 is divided into a second frame 38 and a first frame 39, and the second frame 38 and the first frame 39 are pivotally connected. When folding, the guardrail 3 is first folded to fit against the top of the frame 1. Then the push rod 2 swings to fit against the frame 1. At the same time, the second frame 38 and the first frame 39 are folded. The second frame 38 is the front frame, and the first frame 39 is the rear frame. This completes the folding of the stroller.

[0046] A locking element 4 is provided at the pivot connection between the second frame 38 and the first frame 39. The locking element 4 extends into both the second frame 38 and the first frame 39 to lock them, restricting their relative rotation. An unlocking element 5 is provided on the frame 1 and the push rod 2. The unlocking element 5 is connected to and linked with the locking element 4. When the push rod 2 swings and folds, the push rod 2 drives the unlocking element 5 to move. The unlocking element 5 pulls the unlocking element 4 to move, and the unlocking element 4 exits the second frame 38, completing the second frame 38. Unlocking the first frame 39 unlocks the locking element 4 by unlocking element 5. Specifically, when push rod 2 swings to fit against frame 1, unlocking element 5 pulls locking element 4 to unlock, and locking element 4 unlocks the second frame 38 from the first frame 39, thus enabling the second frame 38 and the first frame 39 to fold. When unfolding is required, the second frame 38 and the first frame 39 are unfolded, and then push rod 2 swings clockwise. Locking element 4 loses the pull of unlocking element 5, and unlocking element 5 extends into the second frame 38 to lock.

[0047] A rotating seat 6 is bolted to the frame 1. A push rod 2 is rotatably connected to the rotating seat 6. The rotating seat 6 is bolted to the frame 1 and is located above the frame 1. The top of the rotating seat 6 has a groove. One end of the push rod 2 extends into the groove. The end of the push rod 2 that extends into the groove is a cylindrical head. A rotating shaft is inserted into the cylindrical head of the push rod 2 and the rotating seat 6, thus achieving a rotatable connection between the end of the push rod 2 and the rotating seat 6. The rotating seat 6 has a sliding groove 7, which communicates with the groove at the top of the rotating seat 6. An unlocking component 5 is installed in the sliding groove 7, which slides back and forth within the sliding groove 7. The sliding groove 7 is a convex groove, and the unlocking component 5 is inserted into the sliding groove 7. The slider 49 is attached to the wall and slides back and forth in the groove 7. The push block 8 is fixed on the outer wall of the cylindrical head of the push rod 2 by integral injection molding. When the push rod 2 rotates counterclockwise, the push block 8 extends into the groove 7 and pushes the unlocking member 5 to move backward. A spring is embedded between the rear end of the push block 8 and the groove 7 to push the push block 8 forward. The locking member 5 and the locking member 4 are connected by a cable 11, which passes through the groove 7. When the unlocking member 5 moves backward, the unlocking member 5 pulls the locking member 4 backward through the cable 11, and the locking member 4 exits the second frame 38. The second frame 38 and the first frame 39 can rotate relative to each other and fold.

[0048] A retractable locking member 4 is installed at the end of the first frame 39. A locking groove 9 is provided on the second frame 38 for the locking pin to be inserted. A first elastic component 15 is provided between the locking member 4 and the first frame 39. The locking member 4 and the unlocking member 5 are connected by a cable 11. When the locking member 4 locks the second frame 38 and the first frame 39, the locking member 4 extends from the first frame 39 and inserts into the locking groove 9 of the second frame 38, thus completing the locking. The second frame 38 and the first frame 39 cannot swing relative to each other. When the unlocking member 5 moves backward and pulls the locking member 4 backward, the locking member 4 exits the locking groove 9 of the second frame 38, thus releasing the locking state of the second frame 38 and the first frame 39.

[0049] A rotating component 12 is installed on the second frame 38, with one end of the rotating component 12 inserted into the second frame 38. The rotating component 12 is fixed to the second frame 38 by bolts. A mating seat 13 is inserted into the first frame 39 and locked in the first frame 39 by bolts. The rotating component 12 is rotatably connected to the mating seat 13. A groove for the rotating component 12 to extend into is provided on the mating seat 13. A rotating shaft is inserted into both the rotating component 12 and the mating seat 13, thus achieving a rotatable engagement between the rotating component 12 and the mating seat 13. The locking groove 9 is provided on the rotating component 12. A limiting groove 14 is provided on the mating seat 13 for the locking component 4 to slide back and forth. The locking component 4 is a pin. The locking component 4 slides back and forth within the limiting groove 14. When the locking component 4 moves forward, it extends into the locking groove 9; when the locking component 4 moves backward... When the locking component 4 exits the locking groove 9, locking and unlocking are achieved. The limiting groove 14 is provided with a first elastic component 15 that pushes the locking component 4 towards the locking groove 9. The first elastic component 15 is a spring. The locking component 4 is pushed forward by the first elastic component 15, so that the locking component 4 extends into the locking groove 9. At the end of the docking seat 13 that extends into the first frame 39, there is a through groove that communicates with the limiting groove 14. The end of the through groove away from the locking component 4 is embedded with a first mounting seat. The first mounting seat is installed in the through groove by bolts. The first elastic component 15 is located between the first mounting seat and the locking component 4. The cable 11 is the handbrake cable. The two ends of the cable are fixed to the locking component 4 and the unlocking component 5 by bolts. The two ends of the protective sleeve of the cable are fixed to the bottom of the first mounting seat and the rotating seat 6 by bolts, so as to ensure the linkage between the unlocking component 5 and the locking component 4.

[0050] A limiting notch 16 is provided on the rotating part 12, and the limiting notch 16 is located below the locking groove 9. A boss 17 is provided on the docking seat 13. The bottom of the limiting notch 16 fits with the boss 17. When the locking part 4 extends into the locking groove 9, the locking part 4 and the boss 17 lock the rotating part 12. When the second frame 38 and the first frame 39 are unfolded, and the second frame 38 and the first frame 39 are on the same straight line, the bottom of the limiting notch 16 fits with the boss 17, thus restricting the second frame 38 and the first frame 39 from continuing to swing. At the same time, the locking part 4 is pushed into the locking groove 9, and the top of the locking part 4 presses into the locking groove 9, thus completing the locking. The boss 17 and the limiting notch 16 ensure the strength of the second frame 38 and the first frame 39 during use.

[0051] The locking member 4 has a beveled end that extends into the limiting groove 14. The beveled surface slopes upward from front to back. When the second frame 38 and the first frame 39 are unfolded, the rotating member 12 presses the locking member 4 into the second frame 38. When the second frame 38 and the rear frame are not unfolded, the push rod 2 swings, and the locking member 4 is pushed forward and extends into the limiting notch 16. When the second frame 38 and the first frame 39 are unfolded, the limiting notch 16 contacts the beveled surface of the locking member 4 and presses the locking member 4 backward and out of the limiting notch 16. The rotating member 12 continues to rotate, and the locking member 4 abuts against the edge of the rotating member 12. When the locking member 4 is opposite to the locking groove 9 of the rotating member 12, the locking member 4 extends into the locking groove 9 to complete the locking.

[0052] Arc-shaped holes 18 are formed on both sides of the rotating base 6. The arc-shaped holes 18 are located on the inner wall of the groove of the rotating base 6. Two locking grooves 19 are formed on the rotating base 6, and multiple locking grooves 19 are formed on the inner wall of the arc-shaped holes 18. One locking groove 19 is located at the front end of the arc-shaped hole 18, and the other locking groove 19 is located in the middle section of the arc-shaped hole 18. An embedding groove 20 is formed at the bottom of the push rod 2. A locking block 21 that can move up and down along the push rod is embedded in the embedding groove 20. A second elastic component 2 is provided between the embedding groove 20 and the locking block 21 to press the locking block 21 downward. 2. The second elastic component 22 is a spring. Both ends of the spring are fixed to the inner walls of the locking block 21 and the embedded groove 20 by bolts. The locking block 21 is pressed downwards by the second elastic component 22. Locking pins 23 are installed on the left and right sides of the locking block 21 by bolts. The locking pins 23 pass through the outer wall of the cylindrical head of the push rod and extend into the arc-shaped hole 18. An oblong hole is opened on the outer wall of the push rod 2 for the locking pins 23 to move up and down. When the locking pins 23 move to the locking groove 19, the locking block 21 presses the locking pins 23 into the locking groove 19 via the second elastic component. Within 9, push rod 2 cannot swing. When push rod 2 needs to swing, pull lock block 21 upward, lock pin 23 leaves lock groove 19 and enters arc-shaped hole 18, so lock pin 23 can slide within arc-shaped hole 18, allowing push rod 2 to swing. When push rod 2 is in contact with frame assembly 1, lock pin 23 is engaged in lock groove 19 at the front end of arc-shaped hole 18. When push rod 2 needs to unfold, lock pin 23 is engaged in lock groove 19 in the middle section of arc-shaped hole 18. When a trailer needs to be pulled, push rod 2 swings backward. The pulling force acts as a traction force, requiring the push rod 2 to be locked and limited. A handle 24 is installed on the top of the push rod 2, and the bottom of the handle 24 is bolted to the top of the push rod 2. A traction component 25 is set between the push rod 2 and the handle 24 to pull the locking block 21 upward. The traction component 25 is a sleeve that is fitted on the push rod 2. The sleeve moves up and down on the push rod 2. The sleeve and the locking block 21 are connected by a pull rope. When the sleeve is pulled upward, the locking block 21 rises, so the locking pin 23 exits the locking groove 19, and the push rod 2 can swing.

[0053] Example 2: Figure 14-18As shown, a base plate 26 is installed on the frame 1 by bolts. The middle section of the base plate 26 is hollowed out to allow the baby's legs to dangle. A removable cover plate 27 is installed in the hollowed-out section of the base plate 26. A cloth bag is fixed between the cover plate 27 and the base plate 26 by bolts. When the cover plate 27 swings downwards, the cloth bag unfolds downwards to form a bag body, preventing the baby's feet from touching the ground. There are two cover plates 27, and one end of each cover plate 27 is rotatably connected to the frame 1. The cover plate 27 and the second frame 3... 8 rotates coaxially with the first frame 39, that is, the pivot passes through the two end plates 27, the second frame 38 and the first frame 39, thus achieving coaxial rotation. The other end of the end plate 27 is detachably connected to the bottom plate 26. When one end of the end plate 27 is detached from the bottom plate 26, the end plate 27 swings downward to form a cavity. When it is not necessary to hang down, the other end of the end plate 27 is locked to the bottom plate 26, so that the bottom plate 26 and the end plate 27 are on the same plane, and a soft pad can be placed on it to lie flat.

[0054] An insert 29 is inserted into the end of the sealing plate 27. A groove for the insert 29 to slide is opened at the end of the sealing plate 27. A slot 30 for the insert 29 to extend into is fixed on the base plate 26 by bolts. A first operating member 31 for fixing the insert 29 is installed below the sealing plate 27. The first operating member 31 passes through the groove and is fixed to the insert 29 by bolts. The first operating member 31 drives the insert 29 to slide in the groove. A translation spring 28 is inserted between the groove at the end of the sealing plate 27 and the sealing plate 27 to push the insert 29 outward. That is, the first operating member 31 is embedded in the sealing plate 27. Within the slot, the insertion plate 29 is pushed outward by the translation spring 28. When disassembly is required, the insertion plate 29 is compressed into the slot of the sealing plate 27 by the first operating member 31, and the insertion plate 29 exits the slot 30. This allows the sealing plate 27 to swing downward. When the insertion plate 29 needs to be inserted into the slot 30, the insertion plate 29 is pressed into the slot of the sealing plate 27 by the first operating member 31, and the sealing plate 27 is swung upward. When the insertion plate 29 is horizontally aligned with the slot 30 on the base plate 26, the first operating member 31 is released, and the insertion plate 29 is pushed into the slot 30 by the translation spring 28 to complete the locking.

[0055] The enclosure 3 includes handrails 32 and backrests 33. Backrests 33 are mounted on the second frame 38 and the first frame 39 via joints 40. Handrails 32 are mounted on the frame 1 on both sides of each backrest 33 via joints 40. A locking pin 34 is provided on the backrest 33 and inserted into the handrail 32. Grooves for sliding the locking pin 34 are provided on both sides of the backrest 33. The locking pin 34 is inserted into the groove of the backrest 33. A spring is embedded between the bottom of the groove of the 3rd section, which pushes the locking pin 34 outward. A hole for the locking pin 34 to extend into is opened on the inner side of the handrail 32. A downwardly recessed groove is opened on the outer side of the backrest 33. A locking block that engages with the groove is integrally formed on the inner side of the handrail 32. When the backrest 33 and the handrail 32 are joined, it prevents the handrail 32 from swinging outward, ensuring the stability of the enclosure structure. When the locking pin 34 extends into the hole of the handrail 32, thus… The splicing of the backrest 33 and the armrest 32 effectively prevents the backrest 33 from swaying and ensures the stability of the structure. The locking pin 34 can extend and retract within the backrest 33. A pressing hole is opened at the top of the back of the backrest 33 for the insertion of the second operating member 35. When the second operating member 35 is pressed upward, it moves upward and is inserted into the pressing hole. The top of the second operating member 35 is connected to the tail of the locking pin 34 by a pull rope. When the second operating member 35 is pressed upward, a spring is embedded in the top of the second operating member 35 and the pressing hole. The spring presses the second operating member 35 downward, and the locking pin 34 retracts into the groove of the backrest 33 and exits the hole of the armrest 32. This causes the backrest 33 to swing inward and contact the base plate 26. The armrest 32 descends under the action of the compression spring and presses the backrest 33 onto the base plate 26. A sunshade is installed on the armrest 32 by bolts.

[0056] Each joint 40 has an arc-shaped guide groove 41 in one of its joint seats. A guide block 42 extending into the guide groove 41 is integrally formed and fixed on the other joint seat of each joint 40. When the joint 40 rotates, the guide block 42 slides in the guide groove 41. When the guide block 42 abuts against the end of the guide groove 41, the guide block 42 cannot slide, and the joint 40 cannot continue to swing outward. This limits the angle of outward swing of the armrest 32 and the backrest 33. A third elastic component 43 is embedded in the guide groove 41 of the joint 40 connecting the armrest 32 to the frame assembly 1. The third elastic component 43 is a spring. The third elastic component 43 pushes the guide block 42, forcing the armrest 32 to swing towards the base plate 26, thus pressing the backrest 33 onto the base plate 26.

[0057] Example 3: Figure 19-21As shown, the frame 1 is equipped with a basket mounting frame 36. Fixing seats 37 are bolted to both the front and rear ends of the frame 1. A second rotating head 45 is mounted on the basket mounting frame 36 and is rotatably connected to the fixing seats 37. A locking cavity is formed on the mating surface between the second rotating head 45 and the fixing seat 37. A locking module 48, which slides within the cavity between the second rotating head 45 and the fixing seat 37, is embedded in the locking cavity. The locking module 48 is a locking block. A spring is embedded at the bottom of the cavity between the locking block and the fixing seat 37, and the spring secures the locking module 48 to the second rotating head 45 and the fixing seat 37. Inside the cavity of the fixed base 37, the second rotating head 45 rotates with the fixed base 37. An unlocking groove 44 is opened on the outer surface of the second rotating head 45. A pressing block 46 is inserted into the unlocking groove 44. A stop block 47 is fixed on the pressing block 46 by an integral molding. The stop block 47 passes through the second rotating head 45 and abuts against the locking module 48. When the locking module 48 is pressed, the placement basket mounting frame 36 is unlocked and rotated and folded. The placement basket mounting frame 36 is fitted with a bag. The edge of the bag is wrapped with Velcro on the placement basket mounting frame 36, so that the items can be placed in the bag.

Claims

1. A baby stroller with a foldable frame, comprising a frame assembly, a push rod, and a side rail, the side rail being rotatably connected to the frame, having multiple wheels at the bottom of the frame assembly, and a base plate mounted on the frame assembly, characterized in that, One end of the frame assembly is pivotally connected to the push rod, and the frame assembly consists of a first frame and a second frame, with the first frame and the second frame pivotally connected. A locking element is provided at the pivot connection between the two sets of frames, and the two sets of frames are locked by the locking element. A sliding unlocking element is provided at the pivot connection between the frame and the push rod. The unlocking element is connected and linked with the locking element. When the push rod swings and folds, it drives the unlocking element to move, and the unlocking element drives the locking element to move to unlock.

2. A baby stroller with a foldable frame according to claim 1, characterized in that, A rotating seat is installed on the frame assembly. The push rod is pivotally connected to the rotating seat. The push rod cylinder rotating seat is pivotally connected to the frame. The rotating seat has a groove. An unlocking component that slides in the groove is installed in the groove. A push block is installed on the push rod. When the push rod rotates, the push block presses the unlocking component to unlock.

3. A baby stroller with a foldable frame according to claim 2, characterized in that, A telescopic locking member is installed on the upper end of the first frame, and a locking groove is provided on the second frame for the locking pin to be inserted into. A first elastic component is provided between the locking member and the first frame. The locking member is pushed out of the first frame and inserted into the second locking groove by the first elastic component to complete the locking of the first frame and the second frame.

4. A baby stroller with a foldable frame according to claim 3, characterized in that, A rotating component is installed on the second frame, and a docking seat is inserted into the first frame. The rotating component is rotatably connected to the docking seat. The first frame and the second frame pivot through the rotatable connection between the rotating component and the docking seat. The locking groove is provided on the rotating component, and a limiting groove for the locking component to slide is provided on the docking seat. A first elastic component is provided in the limiting groove to push the locking component into the locking groove.

5. A baby stroller with a foldable frame according to claim 4, characterized in that, A limiting notch is made on the rotating part and the limiting notch is located below the locking groove. A boss is provided on the mating seat. The bottom of the limiting notch fits with the boss. When the locking part extends into the locking groove, the locking part and the boss lock the rotating part.

6. A baby stroller with a foldable frame according to claim 2 or 5, characterized in that, An arc-shaped hole is formed in the rotating base, and multiple locking grooves are formed on the rotating base and set on the periphery of the arc-shaped hole. An embedding groove is formed at the bottom of the push rod, and a locking block that can move up and down along the push rod is embedded in the embedding groove. A second elastic component is set between the embedding groove and the locking block to press the locking block downward. Locking pins are set on both sides of the locking block. The locking pins pass through the push rod and extend into the arc-shaped hole. An oblong hole for the locking pins to move up and down is formed on the outer wall of the push rod. A handle is set at the top of the push rod, and a traction component is set between the push rod and the handle to pull the locking block upward.

7. A baby stroller with a foldable frame according to claim 1, characterized in that, The bottom plate has a hollowed-out section in the middle to allow the baby to hang down their legs. A removable cover plate is installed in the hollowed-out section of the bottom plate. There are two cover plates, and one end of each cover plate is rotatably connected to the frame assembly. The cover plates, the first frame, and the second frame rotate coaxially. An insert is inserted into the end of the cover plate. The bottom plate has a slot for the insert to extend into. A first operating component is installed below the cover plate and fixed to the insert. The extension and retraction of the insert is achieved through the first operating component.

8. A baby stroller with a foldable frame according to claim 1, characterized in that, The enclosure includes handrails and backrests. Backrests are mounted on the first and second frames via a rotatable connection. Handrails are mounted on the frame assemblies on both sides of each backrest via a rotatable connection. A compression spring is provided between the handrail and the frame to press the handrail against the base plate. A locking pin is provided on the backrest and inserted into the handrail. The handrail has a locking hole for the locking pin to be inserted into. The locking pin is inserted into the locking hole to lock the handrail and the backrest. The locking pin can extend and retract within the backrest. A second operating component connected to the locking pin is installed on the backrest.

9. A baby stroller with a foldable frame according to claim 8, characterized in that, The armrests and backrests are rotatably connected to the frame assembly via joints. An arc-shaped guide groove is opened in one of the joint seats of each joint, and a guide block extending into the guide groove is fixed on the other joint seat of each joint. This limits the angle at which the armrests and backrests swing outward. A third elastic component is embedded in the guide groove.

10. A baby stroller with a foldable frame according to claim 1, characterized in that, The frame assembly is equipped with a basket mounting frame, which is rotatably connected to the frame. A locking module is provided between the basket mounting frame and the frame to lock the basket mounting frame. When the locking module is pressed, the basket mounting frame unlocks and rotates and folds.

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