Baby stroller structure

Abstract

The present application relates to the technical field of baby stroller, and particularly relates to a baby stroller structure, a rear support leg is fixed on a joint assembly, a front support leg is rotatably connected to the joint assembly, a support frame is rotatably connected to the joint assembly, a rear handrail is rotatably connected to the joint assembly, one end of an upper support link is hinged to the support frame, one end of a rear support link is hinged to the rear support leg, one end of a front support link is hinged to the front support leg, the other end of the upper support link, the other end of the front support link and the other end of the rear support link are hinged to each other, two ends of a second link are respectively hinged to a rod body of the rear support link and the rear handrail, and the joint assembly is used for realizing two states of locking or unlocking between the rear support leg and the rear handrail. When the present application is used, the support frame, the front support leg, the rear support leg and the rear handrail are synchronously folded, and the folding and storage efficiency of the stroller is improved.

Description

Technical Field

[0001] This invention relates to the field of baby stroller technology, and in particular to a baby stroller structure. Background Technology

[0002] Strollers are common companion tools for infants and toddlers, widely used in various scenarios such as daily family outings and outdoor play due to their convenient pushing and carrying functions. Most mainstream strollers on the market have a standardized basic support structure, mainly consisting of a front support frame, a rear support frame, a push handle, and a seat. Both the front and rear support frames are equipped with casters at their bottom ends. These two sets of support frames, together with the casters, form the overall walking support structure, ensuring stability and maneuverability during stroller movement. The seat is fixedly mounted in the support area between the front and rear support frames, primarily used to support and position the infant, providing a safe riding space. The push handle is fixed to the upper rear of the stroller, allowing the user to grip and apply force to propel the stroller, meeting the needs of infants and toddlers for transportation when out and about.

[0003] In existing technology, the unfolding and folding of such strollers are performed in separate, independent steps, with the opening and closing actions of the stroller structure being independent and unable to be synchronized. Specifically, when unfolding the stroller, the operator needs to manually open the front and rear support frames to support and shape the entire stroller frame. After the support frame structure is fully unfolded and locked, the seat structure is then unfolded and laid out separately to complete the overall assembly of the stroller before it can be used. Similarly, the folding and storage process after use is equally cumbersome. The operator needs to first fold and store the unfolded seat structure separately, and after placing the seat, the front and rear support frames are folded and stored to finally achieve the storage of the entire stroller.

[0004] Existing strollers employ the aforementioned step-by-step folding and unfolding structure, which has revealed numerous defects and shortcomings in actual use. The entire stroller's opening and closing operation is complex and fragmented, requiring multiple independent steps for both unfolding and folding. This cumbersome and time-consuming process significantly reduces the stroller's efficiency in both unfolding and folding, failing to meet users' needs for quick access and storage. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings and deficiencies of the existing technology by providing a baby stroller structure.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The present invention discloses a baby stroller structure, comprising a joint assembly and a linkage assembly; a rear support leg is fixed to the joint assembly; a front support leg is rotatably connected to the joint assembly; a support frame is rotatably connected to the joint assembly; and a rear armrest is rotatably connected to the joint assembly. The linkage assembly consists of an upper support link, a front support link, a rear support link, and a second link. One end of the upper support link is hinged to the support frame; one end of the rear support link is hinged to the rear support leg; one end of the front support link is hinged to the front support leg; the other ends of the upper support link, the front support link, and the rear support link are hinged together; both ends of the second link are respectively hinged to the body of the rear support link and the rear armrest. The joint assembly is used to realize both locked and unlocked states between the rear support leg and the rear armrest.

[0007] Furthermore, the joint assembly includes a support leg bracket fixed to the rear support leg, a support connecting frame fixedly connected to the support leg bracket, and a rear armrest seat rotatably connected to the support leg bracket; A gear locking module is connected between the support leg bracket and the rear armrest seat; the gear locking module is used to unlock and lock the support leg bracket and the rear armrest seat; the end of the second connecting rod away from the rear support connecting rod is hinged to the eccentric position of the rear armrest seat; the front support leg is hinged to the support leg bracket; the rear armrest seat is fixedly connected to the rear armrest; the support connecting frame is hinged to one end of the support frame.

[0008] Furthermore, the support leg bracket is provided with a front connecting shaft; the support connecting frame is provided with a rear connecting shaft fixedly connected to the front connecting shaft; the rear armrest seat is provided with a rear through-hole rotatably connected to the front connecting shaft; the gear locking module consists of a gear rotatably connected to the front connecting shaft, a lifting member rotatably connected to the front connecting shaft, and a compression spring provided inside the support leg bracket; the outer side wall of the gear is provided with teeth; the compression spring, gear, and lifting member are arranged sequentially along the axial direction of the front connecting shaft; The support leg bracket has a front gear positioning groove that matches the teeth; the rear armrest seat has a rear gear positioning groove that matches the teeth; the front gear positioning groove and the rear gear positioning groove are arranged opposite each other.

[0009] Furthermore, the lifting member has a circular ring shape; the rear armrest seat has a rear gear groove that matches the lifting member; the lifting member is embedded in the rear gear groove; and the lifting member has a front wedge groove. The inner bottom wall of the rear gear groove is provided with a rear wedge block that is used to match the front wedge groove; the rear wedge block is embedded in the front wedge groove; After the compression spring presses the gear and the lifting component together, the rear wedge block is fully embedded in the front wedge groove.

[0010] Furthermore, the side surface of the lifting component is provided with a steel cable groove; the top of the lifting component is provided with a steel cable connection hole that communicates with the steel cable groove.

[0011] Furthermore, the number of teeth, front gear positioning grooves, and rear gear positioning grooves are all four; the teeth, front gear positioning grooves, and rear gear positioning grooves are all evenly distributed along the circumferential direction of the front connecting shaft.

[0012] Furthermore, a front armrest seat and a follower plate are rotatably connected to the support leg bracket; a front armrest is fixed on the front armrest seat; and the follower plate is connected to the front armrest seat. A first link connects the follower plate and the rear support link; the two ends of the first link are respectively hinged to the body of the rear support link and the eccentric position of the follower plate.

[0013] Furthermore, both the front armrest seat and the follower plate are rotatably connected to the support connecting frame; The front armrest seat is configured as an open shell shape on the side facing the follower plate; the follower plate is provided with a stop block that extends into the inner cavity of the front armrest seat shell; the inner cavity of the front armrest seat is provided with a stop strip.

[0014] Furthermore, a locking block is provided on the side of the front armrest seat near the follower plate; a locking slot is provided on the support connecting frame for use with the locking block; the locking slot is on the rotation path of the locking block.

[0015] With the above structure, the beneficial effects of this invention are as follows: After the front and rear support legs are fully extended, the rear support link and the front support link are straightened. The tension between the rear and front support links prevents the angle between the front and rear support legs from widening further. Then, the joint assembly locks, preventing rotation between the rear support leg and the rear armrest. The end of the second link connected to the rear armrest cannot move, thus preventing the triangular structure formed by the second link, the rear support link, and the rear support leg from moving. The connection points between the rear support link and the upper support link, and between the rear support link and the front support link, also cannot move. Therefore, the linkage system formed by the front support leg and the front support link cannot swing, and the linkage system formed by the support frame and the upper support link also cannot swing. Thus, after the joint assembly is locked, complete fixation is achieved between the rear support leg, the front support leg, the support frame, and the rear armrest. With the joint assembly unlocked, the folding action of the rear support link and the front support link causes the upper support link to pull the support frame to rotate on the joint assembly, folding the support frame. At the same time, the second link pulls the rear handle to rotate on the joint assembly, causing the support frame, front support leg, rear support leg and rear handle to fold synchronously, improving the efficiency of folding and storing the trolley. Attached Figure Description

[0016] Figure 1This is a structural diagram of the invention in its fully open state; Figure 2 This is a partial view of the present invention; Figure 3 This is an exploded view of the joint assembly and link assembly. Figure 4 It is an exploded view of the support leg bracket and gear assembly; Figure 5 It is a cross-sectional view of the support leg bracket and gear assembly; Figure 6 It is a 3D view of the lifting mechanism; Figure 7 This is a structural diagram of the rear armrest seat; Figure 8 This is a first-person exploded view of the front armrest seat, follower plate, support connecting frame, and the connection of the support frame. Figure 9 This is a first-person exploded view of the front armrest seat, follower plate, support connecting frame, and the connection of the support frame. Figure 10 This is a structural diagram of the present invention in its first folded state; Figure 11 This is a structural diagram of the present invention with all components except the front armrest fully folded.

[0017] Figure 12 This is a structural diagram of the present invention in its fully folded state; Explanation of reference numerals in the attached figures: 1. Support leg bracket; 101. Front connecting shaft; 102. Front gear positioning groove; 103. Front gear groove; 2. Lifting component; 201. Front wedge groove; 202. Cable passage groove; 203. Cable connection hole; 3. Rear armrest seat; 301. Rear through-hole for pivot shaft; 302. Rear gear positioning groove; 303. Rear wedge block; 304. Rear gear groove; 4. Fixing plate; 5. Front armrest seat; 501. Rear armrest seat through hole; 502. Stop bar; 503. Locking block; 6. Front armrest; 7. Support frame; 8. Upper support link; 9. Front support link; 10. First link; 11. Rear support link; 12. Second connecting rod; 13. Decorative cover; 14. Gear; 1401. Tooth; 15. Compression spring; 16. Front support leg; 17. Rear support leg; 18. Rear armrest; 19. Follower plate; 1901. Stop block; 20. Support connecting frame; 2001. Rear connecting shaft; 2002. Slot; 21. Press switch. Detailed Implementation

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] like Figures 1 to 12 As shown, the present invention discloses a baby stroller structure comprising a joint assembly and a linkage assembly; a rear support leg 17 is fixed to the joint assembly; a front support leg 16 is rotatably connected to the joint assembly; a support frame 7 is rotatably connected to the joint assembly; and a rear armrest 18 is rotatably connected to the joint assembly. The linkage assembly consists of an upper support link 8, a front support link 9, a rear support link 11, and a second link 12. One end of the upper support link 8 is hinged to the support frame 7; one end of the rear support link 11 is hinged to the rear support leg 17; one end of the front support link 9 is hinged to the front support leg 16; the other ends of the upper support link 8, the front support link 9, and the rear support link 11 are hinged together; both ends of the second link 12 are respectively hinged to the body of the rear support link 11 and the rear armrest 18. The joint assembly is used to realize both locked and unlocked states between the rear support leg 17 and the rear armrest 18. The joint assembly, linkage assembly, rear support leg 17, rear armrest 18 and support frame 7 are all set in pairs, which is not fundamentally different from the existing stroller layout; The front support leg 16 and the rear support leg 17 are both equipped with wheels; a four-point support structure is formed by the front support leg 16 on both sides and the rear support leg 17 on both sides. A seat cushion is fixed on the support frame 7, and a backrest is provided on the rear armrest 18. The seat cushion and the backrest form a mattress for supporting the baby. The rear support leg 17 is fixed to the joint assembly, thus the rear support leg 17 serves as a fixing part for folding or unfolding the trolley; the front support leg 16, the support frame 7 and the rear armrest 18 can all rotate relative to the rear support leg 17. Therefore, when the front support leg 16 and the rear support leg 17 rotate relative to each other, the rear support link 11 and the front support link 9 rotate relative to each other and fold. After the front support leg 16 and the rear support leg 17 are fully extended, the rear support link 11 and the front support link 9 are straightened. The tension between the rear support link 11 and the front support link 9 prevents the angle between the front support leg 16 and the rear support leg 17 from opening further. Then, the joint assembly is locked, preventing the rear support leg 17 from rotating with the rear armrest 18. The end of the second link 12 connected to the rear armrest 18 cannot move, thus preventing the triangular structure formed by the second link 12, the rear support link 11, and the rear support leg 17 from moving. The connection points between the rear support link 11 and the upper support link 8, and between the rear support link 11 and the front support link 9, also cannot move. Therefore, the linkage system formed by the front support leg 16 and the front support link 9 cannot swing, nor can the linkage system formed by the support frame 7 and the upper support link 8. Thus, after the joint assembly is locked, complete fixation is achieved between the rear support leg 17, the front support leg 16, the support frame 7, and the rear armrest 18. With the joint assembly unlocked, the folding action of the rear support link 11 and the front support link 9 causes the upper support link 8 to pull the support frame 7 to rotate on the joint assembly, thus folding the support frame 7. At the same time, the second link 12 pulls the rear handle 18 to rotate on the joint assembly, causing the support frame 7, the front support leg 16, the rear support leg 17, and the rear handle 18 to fold synchronously, improving the efficiency of folding and storing the trolley.

[0020] In a preferred embodiment of the present invention, the joint assembly includes a support leg bracket 1 fixed to the rear support leg 17, a support connecting frame 20 fixedly connected to the support leg bracket 1, and a rear armrest seat 3 rotatably connected to the support leg bracket 1. A gear locking module is connected between the support leg bracket 1 and the rear armrest seat 3; the gear locking module is used for unlocking and locking the support leg bracket 1 and the rear armrest seat 3; the end of the second connecting rod 12 away from the rear support connecting rod 11 is hinged to the eccentric position of the rear armrest seat 3; the front support leg 16 is hinged to the support leg bracket 1; the rear armrest seat 3 is fixedly connected to the rear armrest 18; the support connecting frame 20 is hinged to one end of the support frame 7; The support leg bracket 1 and the support connecting frame 20 are an integral structure, so the support leg bracket 1 and the support connecting frame 20 rotate synchronously; a decorative cover 13 is provided on the outer side of the support leg bracket 1; With the gear locking module locking and fixing the rear armrest seat 3 and the support leg bracket 1, the triangular structure formed by the second link 12, the rear support link 11 and the rear support leg 17 cannot move; the connection point between the rear support link 11 and the upper support link 8 and the connection point between the rear support link 11 and the front support link 9 also cannot move; therefore, the front support leg 16 and the support frame 7 are also fixed; a fixing plate 4 is fixed on the rear armrest seat 3 to form a hinge with one end of the second link 12; After the gear locking module unlocks the rear armrest seat 3 and the support leg bracket 1, the rear armrest 18 and the rear armrest seat 3 can rotate around the support leg bracket 1. During the rotation of the rear armrest seat 3, the second link 12 exerts a pushing force on the body of the rear support link 11, causing the second link 12 to swing downward around the rear support leg 17, folding the front support link 9 and the rear support link 11, producing two effects: first, the rear support leg 17 and the front support leg 16 fold towards each other; second, the upper support link 8 is pulled downward, causing the support frame 7 to fold downward around the support connecting frame 20. Therefore, by folding the rear armrest 18 relative to the rear support leg 17, the folding of other parts of the stroller can be achieved.

[0021] In a preferred embodiment of the present invention, the support leg bracket 1 is provided with a front connecting shaft 101; the support connecting frame 20 is provided with a rear connecting shaft 2001 fixedly connected to the front connecting shaft 101; the rear armrest seat 3 is provided with a rear through-hole 301 rotatably connected to the front connecting shaft 101; the gear locking module consists of a gear 14 rotatably connected to the front connecting shaft 101, a lifting member 2 rotatably connected to the front connecting shaft 101, and a compression spring 15 disposed inside the support leg bracket 1; the outer side wall of the gear 14 is provided with teeth 1401; the compression spring 15, the gear 14, and the lifting member 2 are arranged sequentially along the axial direction of the front connecting shaft 101; The support leg bracket 1 has a front gear positioning groove 102 that matches the tooth 1401 inside; the rear armrest seat 3 has a rear gear positioning groove 302 that matches the tooth 1401 inside; the front gear positioning groove 102 and the rear gear positioning groove 302 are arranged facing each other. The depth of the front gear positioning groove 102 is greater than the depth of the tooth 1401, ensuring that the entire tooth 1401 can be embedded into the interior of the front gear positioning groove 102. The gear 14 has a circular ring structure. The support leg bracket 1 has a gear groove 103 inside for accommodating the annular contour of the gear 14, and the rear armrest seat 3 has a rear gear groove 304 inside for accommodating the annular contour of the gear 14. Under normal conditions, the spring force of the compression spring 15 pushes the gear 14 and the lifting member 2 toward the rear armrest seat 3, so that the teeth 1401 are simultaneously embedded in the front gear positioning groove 102 and the rear gear positioning groove 302. The teeth 1401 simultaneously clamp the front gear positioning groove 102 and the rear gear positioning groove 302, so that the rear armrest seat 3 and the support leg bracket 1 cannot rotate relative to each other, thus achieving the locking state of the support leg bracket 1 and the rear armrest seat 3. However, when unlocking is required, pressure is applied to the lifting member 2 towards the gear 14, causing the gear 14 to overcome the elastic force of the compression spring 15 and move towards the support leg bracket 1, fully engaging the entire tooth 1401 into the interior of the front gear positioning groove 102, thus unlocking. The rear armrest seat 3 can rotate around the support leg bracket 1. When the gear 14 rotates relative to the lifting member 2, the friction between the surface of the gear 14 and the surface of the lifting member 2 is negligible.

[0022] In a preferred embodiment of the present invention, the lifting member 2 is a circular ring-shaped structure; the rear armrest seat 3 is provided with a rear gear groove 304 that matches the lifting member 2; the lifting member 2 is embedded in the rear gear groove 304; and the lifting member 2 is provided with a front wedge groove 201. The inner bottom wall of the rear gear groove 304 is provided with a rear wedge block 303 that is used in conjunction with the front wedge groove 201; the rear wedge block 303 is embedded in the front wedge groove 201; After the compression spring 15 presses the gear 14 and the lifting member 2 together, the rear wedge block 303 is completely embedded in the front wedge groove 201. The lifting member 2 can rotate inside the rear gear groove 304; the depth of the front wedge groove 201 gradually increases with the circumferential direction of the lifting member 2; the push switch 21 is not fundamentally different from the push switch structure of the existing handcart, so it will not be described in detail. A push-button switch 21 is provided on the rear armrest 18. A steel cable (not shown in the figure) connects the push-button switch 21 to the eccentric position of the lifting member 2. When the push-button switch 21 is pulled by hand, it pulls the steel cable, causing the lifting member 2 to rotate within the rear gear groove 304. As the front wedge groove 201 rotates on the surface of the rear wedge block 303, the rear wedge block 303 pushes the surface of the front wedge groove 201, causing the lifting member 2 to move towards the gear 14 and completely embed the entire tooth 1401 into the interior of the front gear positioning groove 102. After the push-button switch 21 is released, the compression spring 15 returns the gear 14 and the lifting member 2 to their original positions, and the tooth 1401 simultaneously engages the front gear positioning groove 102 and the rear gear positioning groove 302.

[0023] In a preferred embodiment of the present invention, the side surface of the lifting member 2 is provided with a steel cable groove 202; the top of the lifting member 2 is provided with a steel cable connection hole 203 communicating with the steel cable groove 202; the side wall of the steel cable connection hole 203 is provided with an opening groove extending through to the lifting member 2; the width of the opening groove is smaller than the diameter of the steel cable connection hole 203 and larger than the diameter of the steel cable, ensuring that the steel cable can pass through the opening groove; one end of the steel cable is connected to the push switch 21, and the side of the steel cable with the cast end is inserted from the steel cable groove 202 and then locked into the steel cable connection hole 203; the steel cable connection hole 203 is a countersunk hole, and after the cast end is locked from the side away from the steel cable groove 202, the cast end cannot be pulled into the steel cable groove 202, improving the convenience of connection.

[0024] In a preferred embodiment of the present invention, the number of teeth 1401, front gear positioning groove 102 and rear gear positioning groove 302 are all four; the teeth 1401, front gear positioning groove 102 and rear gear positioning groove 302 are all evenly distributed along the circumferential direction of the front connecting shaft 101. Multiple teeth 1401 are positioned simultaneously, reducing the stress on individual teeth 1401 and lowering the risk of tooth 1401 breakage.

[0025] In a preferred embodiment of the present invention, a front armrest seat 5 and a follower plate 19 are rotatably connected to the support leg bracket 1; a front armrest 6 is fixed on the front armrest seat 5; and the follower plate 19 is connected to the front armrest seat 5. A first connecting rod 10 is connected between the follower plate 19 and the rear support connecting rod 11; the two ends of the first connecting rod 10 are respectively hinged to the rod body of the rear support connecting rod 11 and the eccentric position of the follower plate 19. When the rear support link 11 swings, it drives the first link 10 to swing, causing the follower plate 19 and the front armrest seat 5 to swing relative to the rear armrest seat 3. The second link 12 and the first link 10 are respectively placed on both sides of the rotation center of the joint assembly; so that when the stroller is folded or opened, the rotation direction of the follower plate 19 and the rotation direction of the rear armrest 3 are always opposite, so that when folded, they fold in the same direction and when opened, they move away from each other.

[0026] In a preferred embodiment of the present invention, both the front armrest seat 5 and the follower plate 19 are rotatably connected to the support connecting frame 20. The front armrest seat 5 is configured as an open shell shape on the side facing the follower plate 19; the follower plate 19 is provided with a stop block 1901 that extends into the inner cavity of the front armrest seat 5 shell; the inner cavity of the front armrest seat 5 is provided with a stop strip 502.

[0027] The front armrest seat 5 has a rear armrest seat through hole 501 inside, through which the rear connecting shaft 2001 passes and the front armrest seat 5 and the support connecting frame 20 form a rotatable connection; while the follower plate 19 is a ring structure, which, after being fitted onto the rear connecting shaft 2001, forms a rotatable connection with the support connecting frame 20. After the support connecting frame 20 and the support leg bracket 1 are locked and fixed by bolts, the rear armrest seat 3, the front armrest seat 5 and the follower plate 19 cannot slide along the axial direction of the rear connecting shaft 2001. The range of rotation of the front armrest seat 5 on the follower plate 19 is determined by the width or central angle of the stop block 1901; the larger the width or central angle of the stop block 1901, the smaller the angle at which the front armrest seat 5 can rotate relative to the follower plate 19; conversely, the smaller the width or central angle of the stop block 1901, the larger the angle at which the front armrest seat 5 can rotate relative to the follower plate 19. Therefore, the front armrest 6 can rotate relative to the front armrest seat 5 under the constraint of the stop bar 502 and the stop block 1901.

[0028] In a preferred embodiment of the present invention, a locking block 503 is provided on the side of the front armrest seat 5 near the follower plate 19; a locking groove 2002 is provided on the support connecting frame 20 to be used in conjunction with the locking block 503; the locking groove 2002 is on the rotation path of the locking block 503. When the stroller is fully open, the front armrest 6 can continue to rotate. After being positioned by the locking block 503 into the slot 2002, the front armrest 6 is positioned on the support connecting frame 20. After the locking block 503 is released from the slot 2002, the front armrest 6 can rotate relative to the front armrest seat 5 under the constraint of the stop bar 502 and the stop block 1901.

[0029] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included in the scope of this patent application.

Claims

1. A baby stroller structure, including a joint assembly; The rear support leg (17) is fixed to the joint assembly; The front support leg (16) is rotatably connected to the joint assembly; The support frame (7) is rotatably connected to the joint assembly; The rear armrest (18) is rotatably connected to the joint assembly; Its features are: It also includes linkage assemblies; The linkage assembly consists of an upper support link (8), a front support link (9), a rear support link (11), and a second link (12); One end of the upper support link (8) is hinged to the support frame (7); one end of the rear support link (11) is hinged to the rear support leg (17); one end of the front support link (9) is hinged to the front support leg (16); the other end of the upper support link (8), the other end of the front support link (9) and the other end of the rear support link (11) are hinged; the two ends of the second link (12) are respectively hinged to the rod body of the rear support link (11) and the rear handrail (18); the joint assembly is used to realize the two states of locking or unlocking between the rear support leg (17) and the rear handrail (18).

2. The baby stroller structure according to claim 1, characterized in that: The joint assembly includes a support leg bracket (1) fixed on the rear support leg (17), a support connecting frame (20) fixedly connected to the support leg bracket (1), and a rear armrest seat (3) rotatably connected to the support leg bracket (1). A gear locking module is connected between the support leg bracket (1) and the rear armrest seat (3); the gear locking module is used to unlock and lock the support leg bracket (1) and the rear armrest seat (3); the end of the second connecting rod (12) away from the rear support connecting rod (11) is hinged to the eccentric position of the rear armrest seat (3); the front support leg (16) is hinged to the support leg bracket (1); the rear armrest seat (3) is fixedly connected to the rear armrest (18); the support connecting frame (20) is hinged to one end of the support frame (7).

3. The baby stroller structure according to claim 2, characterized in that: The support leg bracket (1) is provided with a front connecting shaft (101); the support connecting frame (20) is provided with a rear connecting shaft (2001) fixedly connected to the front connecting shaft (101); the rear armrest seat (3) is provided with a rear through shaft through hole (301) rotatably connected to the front connecting shaft (101); the gear locking module consists of a gear (14) rotatably connected to the front connecting shaft (101), a lifting member (2) rotatably connected to the front connecting shaft (101), and a compression spring (15) provided inside the support leg bracket (1); the outer side wall of the gear (14) is provided with teeth (1401); the compression spring (15), gear (14), and lifting member (2) are arranged sequentially along the axial direction of the front connecting shaft (101); The support leg bracket (1) has a front gear positioning groove (102) that matches the tooth (1401) inside; the rear armrest seat (3) has a rear gear positioning groove (302) that matches the tooth (1401) inside; the front gear positioning groove (102) and the rear gear positioning groove (302) are arranged opposite each other.

4. The baby stroller structure according to claim 3, characterized in that: The lifting member (2) has a circular ring shape; the rear armrest seat (3) has a rear gear groove (304) that matches the lifting member (2); the lifting member (2) is embedded in the rear gear groove (304); the lifting member (2) has a front wedge groove (201). The inner bottom wall of the rear gear groove (304) is provided with a rear wedge block (303) that is used in conjunction with the front wedge groove (201); the rear wedge block (303) is embedded in the front wedge groove (201); After the compression spring (15) presses the gear (14) and the lifting member (2) together, the rear wedge block (303) is fully embedded in the front wedge groove (201).

5. The baby stroller structure according to claim 4, characterized in that: The side surface of the lifting component (2) is provided with a steel cable groove (202); the top of the lifting component (2) is provided with a steel cable connection hole (203) that communicates with the steel cable groove (202).

6. The baby stroller structure according to claim 3, characterized in that: The number of teeth (1401), front gear positioning groove (102) and rear gear positioning groove (302) are all four; the teeth (1401), front gear positioning groove (102) and rear gear positioning groove (302) are all evenly distributed along the circumferential direction of the front connecting shaft (101).

7. The baby stroller structure according to claim 2, characterized in that: The support leg bracket (1) is rotatably connected to a front armrest seat (5) and a follower plate (19); a front armrest (6) is fixed on the front armrest seat (5); the follower plate (19) is connected to the front armrest seat (5); A first link (10) is connected between the follower plate (19) and the rear support link (11); the two ends of the first link (10) are respectively hinged to the body of the rear support link (11) and the eccentric position of the follower plate (19).

8. The baby stroller structure according to claim 7, characterized in that: The front armrest seat (5) and the follower plate (19) are both rotatably connected to the support connecting frame (20); The front armrest seat (5) is configured as an open shell shape on the side facing the follower plate (19); the follower plate (19) is provided with a stop block (1901) that extends into the inner cavity of the front armrest seat (5); the inner cavity of the front armrest seat (5) is provided with a stop bar (502).

9. The baby stroller structure according to claim 8, characterized in that: The front armrest seat (5) is provided with a locking block (503) on the side near the follower plate (19); the support connecting frame (20) is provided with a slot (2002) for use with the locking block (503); the slot (2002) is on the rotation path of the locking block (503).

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