Adjustable baby stroller

Abstract

The invention provides an adjustable child stroller which comprises a base fixed to a stroller frame and used as an installation carrier of a seat assembly; the seat assembly comprises a seat mounted on the base and a backrest mounted at the rear end of the seat, the seat is in arc-shaped sliding fit with the top of the base, and the front-back inclination of the seat can be adjusted; the first lock bolt assembly is arranged between the base and the seat and is used for fixing the seat on the base; the control assembly is connected with the first lock bolt assembly and used for driving the first lock bolt assembly to act. The adjustable child stroller is compact in structure and convenient and labor-saving to operate, can effectively meet the variable riding requirements of children in the growth process, improves the family travel convenience, ensures the safety and health of the children, and is good in use effect and experience.

Description

Technical Field

[0001] The present invention relates to a trolley, and particularly to an adjustable children's trolley. Background Art

[0002] In the field of children's trolleys, comfort and adaptability are two important considerations. Especially in the seat design, it is necessary to adjust according to children of different ages and weights to ensure that they can sit on the trolley comfortably and safely. However, the seat adjustment functions of many children's trolleys on the market are limited at present. The seats of most trolleys are fixed in one position and cannot be adjusted according to the growth of children or their postures during riding. This fixed design cannot provide the best comfort and support for children with different body postures and activity requirements, which may affect the long-term riding experience of children and even increase the probability of physical discomfort or safety risks for children.

[0003] In addition, the existing seat adjustment mechanisms of children's trolleys are mostly relatively complex, and the installation and adjustment operations are cumbersome and not easy to operate. Especially for parents, when frequent adjustment or modification is required, it increases their burden. These operational inconveniences may make it difficult for parents to quickly adjust the seat during use. Especially when the child needs to rest quickly or change the sitting posture, it may delay long-term outdoor activities or play plans and affect the interaction experience between parents and children.

[0004] In summary, the problems existing in the seat adjustment of the existing children's trolleys need to be solved urgently. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an adjustable children's trolley that can be adjusted with multiple functions according to different needs, is convenient and labor-saving to adjust, and has a good use effect.

[0006] The present invention provides an adjustable children's trolley, which includes:

[0007] A base, fixed on the frame 1, serving as an installation carrier for the seat assembly;

[0008] A seat assembly, including a seat 41 installed on the base and a backrest 42 installed at the rear end of the seat 41. The seat 41 is slidably fitted in an arc shape on the top of the base and can adjust the front and rear inclination of the seat 41;

[0009] A first locking bolt assembly 82, arranged between the base and the seat 41, for fixing the seat 41 on the base;

[0010] A control assembly, connected to the first locking bolt assembly 82, for driving the first locking bolt assembly 82 to act.

[0011] Further, the seat 41 is slidably fitted on the base through an arc-shaped guide rail assembly. There are two guide rail assemblies, which are symmetrically arranged on both sides of the lower end of the seat 41.

[0012] Further, the first locking bolt assembly 82 includes a first slider 821 and a first elastic member. The first slider 821 is slidably fitted on the base, and its sliding direction is parallel to the rotation axis of the seat 41. A first locking portion 823 is provided at the end of the first slider 821. A second locking portion 412 capable of connecting with the first locking portion 823 is provided on the seat 41. There are multiple second locking portions 412, which are arranged in an arc around the rotation axis of the seat 41. The first elastic member makes the first slider 821 tend to move closer to the second locking portion. A first lever 822 for connecting with the control assembly is provided on the side wall of the first slider 821.

[0013] Further, the first locking portion 823 is a pin shaft or a tooth, and the second locking portion 412 is a pin hole corresponding to the pin shaft or a tooth surface corresponding to the tooth.

[0014] Further, there are two first sliders 821, which are symmetrically arranged, and the first elastic member is arranged between the two first sliders 821.

[0015] Further, the control assembly includes a driving plate 81 slidably fitted on the base. The sliding direction of the driving plate 81 is perpendicular to the sliding direction of the first slider 821 on the first locking bolt assembly 82. A first guide groove for the first lever 822 on the first locking bolt assembly 82 to insert and for guiding the sliding of the first slider 821 is provided on the driving plate 81.

[0016] Further, the first guide groove includes a first groove body 8111 and a second groove body 8112 that are communicated with each other. The length direction of the first groove body 8111 is parallel to the sliding direction of the driving plate 81, and the second groove body 8112 is an arc groove or an inclined groove for guiding the first lever 822 to move inward.

[0017] Further, the front and rear positions of the backrest 42 are adjustable.

[0018] Further, mounting seats 5 capable of moving back and forth are slidably fitted on both sides of the seat 41. The backrest 42 is mounted on the mounting seats 5. A second locking bolt assembly connected with the control assembly and used for fixing the mounting seats 5 is provided between the base and the seat 41.

[0019] Further, the second latch assembly includes a second slider 831, a lifting seat 84, a first lever 93, and a second elastic member. The second slider 831 is slidably fitted on the base and its sliding direction is parallel to the rotation axis of the seat 41. One end of the second slider 831 is provided with a first guide block 833, which is connected to the lifting seat 84 slidably fitted vertically on the base and is used to guide the lifting seat 84 to move up and down. A second lever 832 for connecting with the control assembly is provided on the side wall of the second slider 831. The first lever 93 is rotatably installed on the seat 41. The head of the first lever 93 forms a latch tongue. A plurality of latch grooves for the latch tongue to be inserted into from bottom to top are formed on the mounting seat 5. A support rod 92 in contact with the lifting seat 84 is hinged to the tail of the first lever 93. The second elastic member makes the latch tongue tend to move closer to the latch groove.

[0020] Further, the rotation axis of the first lever 93 is perpendicular to the rotation axis of the seat 41.

[0021] Further, a second guide groove for the second lever 832 on the second latch assembly to be inserted into and for guiding the sliding of the second slider 831 is formed on the driving plate 81 of the control assembly.

[0022] Further, the second guide groove includes a third groove body 8101 and a fourth groove body 8102 that are communicated with each other. The length direction of the third groove body 8101 is parallel to the sliding direction of the driving plate 81. The fourth groove body 8112 is an arc groove or an inclined groove for guiding the second lever 822 to move inward.

[0023] Further, the first guide groove and the second guide groove on the driving plate 81 of the control assembly face in opposite directions, and the two movement directions of the driving plate can trigger the first latch assembly and the second latch assembly respectively.

[0024] Further, an arc-shaped support surface coaxial with the rotation axis of the seat 41 is provided on the top surface of the lifting seat 84. The end of the support rod 92 is in contact with the support surface.

[0025] Further, an arc-shaped protrusion is provided on the top surface of the lifting seat. The support surface is arranged at the top of the arc-shaped protrusion. A limiting groove for accommodating the arc-shaped protrusion is provided at the end of the support rod 92.

[0026] Further, a guide roller or a guide wheel for contacting the support surface is provided at the end of the support rod 92.

[0027] Further, there are a plurality of latch grooves, which are arranged in sequence along the sliding direction of the mounting seat 5.

[0028] Further, the base includes a lower base 2 for connecting to the vehicle frame 1 and an upper base 3 rotatably mounted on the lower base 2. The rotation axis of the upper base 3 is perpendicular to the horizontal plane. The seat 41 is mounted on the upper base 3. A third locking bolt assembly is provided on the upper base 3 for fixing the upper base 3 to the lower base 2 and achieving rotational limit.

[0029] Further, the third locking bolt assembly includes a driving block 101, a driven block 102, and a pull handle 7. The contact surface between the driving block 101 and the driven block 102 is an inclined surface. A pushing portion 77 for contacting the driving block 101 is provided at the tail of the pull handle. When the pull handle is rotated, the pushing portion 77 can push the driving block 101 to move and enable the driven block 102 to move out of the limiting hole 20 on the side wall of the lower base 2 and achieve separation.

[0030] Further, there are multiple limiting holes 20, which are arranged in an annular array on the side wall of the lower base 2.

[0031] Further, the upper base can achieve 360-degree rotation.

[0032] Further, the pull handle 7 is rotatably mounted at the end of the driving plate 81 of the control assembly through a main shaft 76. A clutch mechanism for controlling the axial movement of the main shaft 76 to achieve engagement and disengagement with the upper base 3 is provided inside the pull handle 7.

[0033] Further, the clutch mechanism includes a pressing block 71 provided on the side wall of the pull handle 7, a sliding plate 75 slidably fitted inside the pull handle 7, and a connecting rod assembly provided between the pressing block 71 and the sliding plate 75 to achieve linkage between the two. An inclined guide groove 750 is formed on the sliding plate 75. A third shifting lever 761 is provided on the side wall of the main shaft 76, and the third shifting lever 761 is sleeved inside the inclined guide groove 750.

[0034] Further, the connecting rod assembly includes a first connecting rod 72 and a third connecting rod 74 hinged inside the pull handle 7. The head of the first connecting rod 72 is hinged to the pressing block 71. The tail of the first connecting rod 72 is hinged to the head of the third connecting rod 74 through a second connecting rod 73. The tail of the third connecting rod 74 is hinged to the sliding plate 75. The sliding plate 75 can be driven to slide by the pressing block 71.

[0035] Further, a fourth elastic member for resetting is provided on the pressing block 71 and / or the sliding plate 75.

[0036] The adjustable baby stroller of the present invention can adjust the front-back inclination of the seat, enabling the child to be in different postures such as lying flat, semi-reclining or upright, meeting the physiological needs of different age groups, enhancing comfort and functionality, providing protection for infants and toddlers during travel, improving riding comfort, and having a good user experience; it can move the backrest back and forth to adapt to the growth of the child's height or body shape changes, dynamically adapt to the growth of the child, optimize the leg space, strengthen the back support, improve riding comfort at the same time, and has a long applicable age range, extending the service life of the stroller and reducing the replacement cost; the seat orientation is adjustable, which can change the child's orientation, enhancing parent-child interaction and sense of security, and being able to flexibly respond to environmental changes, such as weather adaptability and terrain safety, greatly improving the use safety and experience; the locking component is designed to be controlled by a single control component, with a compact structure and a small installation space, improving the operation reliability and stability, and being convenient and labor-saving to operate; the adjustable baby stroller of the present invention has a compact structure, is convenient and labor-saving to operate, can effectively meet the changing riding needs during the child's growth process, improve the convenience of family travel, ensure the safety and health of the child, and has good use effects and experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic structural diagram of the adjustable baby stroller of the present invention;

[0038] Figure 2 is a schematic structural diagram of the seat assembly of the adjustable baby stroller of the present invention;

[0039] Figure 3 is a schematic structural diagram of the seat assembly of the adjustable baby stroller of the present invention from another angle;

[0040] Figure 4 is Figure 3 the enlarged view of part A in

[0041] Figure 5 is a schematic structural diagram of the control component of the adjustable baby stroller of the present invention;

[0042] Figure 6 is a schematic structural diagram of the first locking bolt component of the adjustable baby stroller of the present invention;

[0043] Figure 7 is a schematic structural diagram of the drive plate of the adjustable baby stroller of the present invention;

[0044] Figure 8 is a schematic structural diagram of the handle of the adjustable baby stroller of the present invention;

[0045] Figure 9 is Figure 8 the enlarged view of part B in

[0046] Figure 10Schematic diagram of the second latch assembly of the adjustable baby stroller of the present invention;

[0047] Figure 11 Schematic diagram of the result of the second slider of the adjustable baby stroller of the present invention;

[0048] Figure 12 Schematic diagram of the structure of the lifting seat of the adjustable baby stroller of the present invention;

[0049] Figure 13 Cross-sectional view of the lifting seat of the adjustable baby stroller of the present invention;

[0050] Figure 14 Schematic diagram of the structure of the third latch assembly of the adjustable baby stroller of the present invention;

[0051] Figure 15 Another perspective structural diagram of the third latch assembly of the adjustable baby stroller of the present invention. Detailed implementation manners

[0052] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0053] Refer to Figures 1 - 15 The present invention provides an adjustable baby stroller, which includes a frame 1, a base, and a seat assembly.

[0054] The base is fixed on the frame 1 and serves as an installation carrier for the seat assembly.

[0055] The seat assembly includes a seat 41 and a backrest 42. The seat 41 is installed on the base. In this application, the seat 41 is slidably fitted on the top of the base in an arc shape, so as to adjust the front-back inclination of the seat 41, that is, the seat 41 can rotate in a first direction, and the rotation axis of the first direction is parallel to the width direction of the seat 41, so as to adjust the inclination angle of the seat 41 in the front-back direction to meet the usage requirements of different age groups and different slopes.

[0056] Specifically, the seat 41 is slidably fitted on the base through an arc-shaped guide rail assembly. The guide rail assembly includes an arc-shaped guide rail (or arc-shaped guide rod) and a sliding seat 411 slidably fitted on the arc-shaped guide rail (or arc-shaped guide rod); there are two guide rail assemblies, which are symmetrically arranged on both sides of the lower end of the seat 41, and an installation area is formed between the two guide rail assemblies for installing control components (the first latch assembly 82, the second latch assembly, and the control assembly).

[0057] The backrest 42 is installed at the rear end of the seat 41 for leaning.

[0058] A first locking bolt assembly 82 is provided between the base and the seat 41. The first locking bolt assembly 82 is used to fix the seat 41 on the base to prevent the seat 41 from accidentally rotating (or moving) during use, ensuring safety in use. The first locking bolt assembly 82 is locked or unlocked by manual operation, which is simple and convenient. When locked, the seat 41 is fixedly connected to the base and cannot be rotated at this time. When unlocked, the seat 41 can slide on the guide rail assembly to adjust the front-back tilt angle to meet different needs.

[0059] The control assembly is connected to the first locking bolt assembly 82 and is used to drive the first locking bolt assembly 82 to act, thereby realizing the locking or unlocking of the front-back adjustment of the seat 41.

[0060] Specifically, referring to Figures 4 - 7 , the first locking bolt assembly 82 includes a first slider 821 and a first elastic member. The first slider 821 is slidably fitted on the base. The sliding direction of the first slider 821 is parallel to the rotation (front-back arc sliding) axis of the seat 41, that is, parallel to the width direction of the seat 41. A first locking portion 823 is provided at the outer end of the first slider 821. At the same time, a second locking portion 412 is provided on the seat 41. The second locking portion 412 is provided on the sliding seat 411, corresponds to the first locking portion 823, and can be connected to form a lock. The second locking portion 412 is multiple and is arranged in an arc around the rotation (arc sliding) axis of the seat 41. In this embodiment, the first locking portion 823 is a pin or a tooth, and the second locking portion 412 is a pin hole corresponding to the pin or a tooth surface corresponding to the tooth. Preferably, the pin and pin hole structure is adopted, which has a simple structure, high reliability and connection strength, and good safety in use. The first elastic member makes the first slider 821 tend to move closer to the second locking portion, that is, the first elastic member makes the first locking bolt assembly 82 tend to be locked.

[0061] In this embodiment, there are two first sliders 821, which are symmetrically arranged left and right. The first elastic member is a compression spring and is arranged between the two first sliders 821, which makes the two first sliders 821 tend to move away from each other. A first lever 822 is provided on the side wall of the first slider 821. The first lever 822 is used to connect to the control assembly. In this embodiment, the first lever 822 is provided at the top or bottom of the first slider 821.

[0062] The control component includes a driving plate 81 which is in a plate-like structure and is slidably fitted on the base. The sliding direction of the driving plate 81 is perpendicular to the sliding direction of the first slider 821. In this embodiment, the sliding direction of the driving plate 81 is perpendicular to the width direction of the seat 41, that is, it can achieve horizontal forward and backward sliding. A first guide groove is formed on the driving plate 81, and the first lever 822 on the first locking bolt assembly 82 can be inserted into the first guide groove. By sliding the driving plate 81, the first slider 821 can be guided to slide to achieve unlocking and locking.

[0063] In this embodiment, the first guide groove includes a first groove body 8111 and a second groove body 8112 which are communicated with each other. Among them, the length direction of the first groove body 8111 is parallel to the sliding direction of the driving plate 81, and the second groove body 8112 is an arc groove or an inclined groove for guiding the first lever 822 to move inward. By providing the first groove body 8111, the driving plate 81 can achieve an idle stroke, which is used for the driving plate to drive the remaining locking bolt assemblies (the second locking bolt assemblies). In order to improve the rationality of the overall layout, in this embodiment, the first groove body 8111 is arranged at the front end of the second groove body 8112. Therefore, when the driving plate moves forward, the first slider 821 can be driven to slide inward to achieve unlocking. Since there are two first sliders 821, there are also two first guide grooves, which are symmetrically arranged on the left and right.

[0064] In order to meet the needs of children of different ages or different heights, in this application, the front and rear positions of the backrest 42 are adjustable.

[0065] Refer to Figures 10 - 13 , mounting seats 5 are slidably fitted on both sides of the seat 41. The mounting seats 5 can move forward and backward. The backrest 42 is mounted on the mounting seats 5, and thus the backrest can be adjusted forward and backward along with the forward and backward movement of the mounting seats 5. At the same time, a second locking bolt assembly is provided between the base and the seat 41. The second locking bolt assembly is connected to the control component and is used to fix the mounting seats 5, that is, to lock the mounting seats 5 at specific positions to ensure the stability of the backrest 42. By adjusting the mounting seats 5, the needs of different children can be flexibly adapted, and the comfort and safety of the seat during use can be improved.

[0066] Specifically, the second locking bolt assembly includes a second slider 831, a lifting seat 84, a first rocker 93, and a second elastic member. The second slider 831 is slidably fitted on the base, and its sliding direction is parallel to the rotation (arc-shaped sliding) axis of the seat 41, that is, parallel to the sliding direction of the first slider 821, and is also a left-right sliding. A first guiding block 833 is provided at the end of the second slider 831. The lifting seat 84 is vertically slidably fitted on both sides of the base. The first guiding block 833 is connected to the lifting seat 84, and the contact surface between the two is an inclined surface and is used to guide (drive) the lifting seat 84 to move up and down. In this application, the first guiding block 833 is a plate-like structure arranged obliquely. An inclined groove 840 matching the inclined surface of the first guiding block 833 is provided on the lifting seat 84. By the inward and outward movement of the first guiding block 833, the up and down movement of the lifting seat 84, that is, lifting, can be realized; a second lever 832 is provided on the side wall of the second slider 831, and the second lever 832 is connected to the control assembly (drive plate) and serves as a drive end.

[0067] The first rocker 93 is rotatably installed on the seat 41. The rotation axis of the first rocker 93 is perpendicular to the rotation (arc-shaped sliding) axis of the seat 41. The first rocker 93 is in the form of a lever, and both ends can rock up and down. The first rocker 93 is arranged in a substantially horizontal state. A locking tongue is formed at the outer head of the first rocker 93. At the same time, a locking groove 510 is provided on the mounting seat 5. The locking groove 510 faces the first rocker 93 and has an open lower end, which can allow the locking tongue at the end of the first rocker 93 to be inserted from bottom to top. Specifically, a strip-shaped protrusion 51 is provided on the inner wall of the mounting seat 5, and the locking groove 510 is provided on the strip-shaped protrusion; when the locking tongue is inserted into the locking groove, the mounting seat 5 is fixed. At this time, the front-back movement cannot be realized, and the locking of the mounting seat 5 is achieved; there are multiple such locking grooves, and they are arranged in sequence along the sliding direction of the mounting seat 5. Preferably, they are equidistantly arranged, which can realize the multi-stage adjustment of the mounting seat 5; a support rod 92 is hinged to the tail (inner side) of the first rocker 93. The rotation axis of the support rod 92 is parallel to the rotation axis of the first rocker 93. The support rod 92 is in a substantially vertical state, and its lower end contacts the lifting seat 84. By the up and down movement of the lifting seat 84, the support rod 92 is driven to move up and down, and then the two ends of the first rocker 93 are pushed to swing.

[0068] The second elastic member makes the locking tongue tend to move closer to the locking groove, that is, the second elastic member makes the second locking bolt assembly tend to be locked.

[0069] The second elastic member is a compression spring, which can be arranged between two second sliders 831 to make the two second sliders 831 tend to move away from each other. When the second slider 831 is located at the outer extreme position, the lifting seat 84 is located at the lower extreme position. At this time, the locking tongue of the first rocker 93 is located in the locking groove of the mounting seat 5, which is the locked state; when the second slider 831 moves inward, it drives the lifting seat 84 to rise, the locking tongue of the first rocker 93 moves downward and disengages from the locking groove to achieve unlocking.

[0070] Meanwhile, the second elastic member can also be arranged on the first rocker 93 to make the outer side (locking tongue) of the first rocker 93 tend to rotate upward.

[0071] To improve the overall use stability and reliability, in this embodiment, the second elastic member is arranged between two second sliders 831 and on the first rocker 93 at the same time, providing double guarantees for smooth locking and unlocking, ensuring that the seat 41 is stable and reliable during use, and avoiding accidental movement.

[0072] A support surface is provided on the top surface of the lifting seat 84. The support surface is arc-shaped and coaxial with the rotation (arc-shaped sliding) axis of the seat 41. As the seat rotates back and forth (tilt adjustment), the first rocker 93 and the support rod 92 rotate synchronously. Therefore, there is relative movement between it and the lifting seat. The end of the support rod 92 contacts the support surface. To improve stability, the support rod 92 is slidably fitted in the seat to avoid deflection during operation and affect unlocking; an arc-shaped protrusion is provided on the top surface of the lifting seat, and the support surface is arranged at the top of the arc-shaped protrusion. At the same time, a limiting groove is provided at the end of the support rod 92, and the limiting groove is used to accommodate the arc-shaped protrusion to form a stable contact and prevent the contact point between the two from disengaging and causing support failure; in this embodiment, the lifting seat 84 is a vertically arranged plate-like structure; to reduce friction, a guide roller or guide wheel for contacting the support surface is provided at the end of the support rod 92, which can form rolling friction, reduce sliding friction, improve the adjustment smoothness, ensure that the seat 41 still maintains stable support during tilt adjustment, and enhance the user experience.

[0073] Meanwhile, a second guide groove is formed in the driving plate 81 of the control assembly. The second guide groove can accommodate the second lever 832 on the second locking bolt assembly. By sliding the driving plate 81, the second slider 831 can be guided to slide to achieve unlocking and locking.

[0074] In this embodiment, the second guide groove includes a third groove body 8101 and a fourth groove body 8102 that are in communication with each other. Among them, the length direction of the third groove body 8101 is parallel to the sliding direction of the driving plate 81, and the fourth groove body 8102 is an arc groove or an inclined groove for guiding the second toggle lever 832 to move inward. By providing the third groove body 8101, the driving plate 81 can achieve an idle stroke, which is used for the driving plate to drive the remaining latch assemblies (the first latch assembly). To improve the rationality of the overall layout, in this embodiment, the second guide groove is provided at the rear end of the first guide groove, and the third groove body 8101 is provided at the rear end of the fourth groove body 8102. Therefore, when the driving plate moves backward, it can drive the second slider 831 to slide inward to achieve unlocking. Since there are two second sliders 831, there are also two second guide grooves, which are symmetrically arranged left and right.

[0075] In this application, the first guide groove and the second guide groove on the driving plate 81 face in opposite directions, so that the two front and rear movement directions of the driving plate can trigger the first latch assembly and the second latch assembly respectively. In this embodiment, when the driving plate 81 moves forward, it can trigger the first slider 831 to slide inward to unlock the seat. At this time, the seat can be adjusted in the front-back tilt angle. When the driving plate 81 moves backward, it can trigger the second slider to move inward to unlock the locking state of the mounting base. At this time, the mounting base can move back and forth to adjust the front-back distance of the backrest 42.

[0076] In this application, the base includes a lower base 2 and an upper base 3. Among them, the lower base 2 is used for fixedly connecting with the vehicle frame 1, and the upper base 3 is rotatably installed on the upper base 3 of the lower base 2, and the rotation axis of the upper base 3 is perpendicular to the horizontal plane. In this embodiment, the lower base 2 is cylindrical and its axis is perpendicular to the horizontal plane. The seat 41 is installed on the upper base 3, and a third latch assembly is provided on the upper base 3. The third latch assembly is used for fixing the upper base 3 on the lower base 2 to achieve locking and unlocking between the upper base and the lower base, and it is used to realize the rotation of the seat 41 in the second direction (the rotation axis is perpendicular to the horizontal plane).

[0077] Refer to Figures 14 - 15The third locking bolt assembly includes a driving block 101, a driven block 102 and a handle 7, wherein the driving block 101 is vertically slidably mounted on the upper base 3, and the driven block 102 is horizontally slidably mounted on the upper base 3. A locking tongue is formed on the inner side of the driven block 102, which is embedded in the limiting hole 20 on the side wall of the lower base 2 to fix the two. At the same time, a third elastic component is provided on the driven block 102, which makes the driven block 102 have a tendency to move outward, even if the driven block 102 has a tendency to disengage from the limiting hole 20, that is, it has a tendency to unlock; the contact surface between the driving block 101 and the driven block 102 is an inclined surface, which is used to change the direction of movement. When the driving block 101 moves downward, it can push the driven block 102 to move outward, so that the locking tongue disengages from the limiting hole 20, thereby unlocking the upper base 3 and the lower base 2, thereby allowing the seat 41 to rotate around the rotation axis to adjust the seat angle.

[0078] A pushing portion 77 is provided at the tail of the pull handle, and its lower end is used to contact the driving block 101, thereby pushing the driving block 101 to move downward; when the pull handle is rotated, the pushing portion 77 can push the driving block 101 to move downward, thereby moving the driven block 102 out of the limiting hole 20 to achieve separation.

[0079] In the present application, the upper base 3 can achieve 360-degree rotation, and there are multiple limiting holes 20, which are arranged in a circular array on the side wall of the lower base 2. In this embodiment, the limiting holes 20 are evenly distributed to ensure that the upper base 3 can be stably locked at any angle.

[0080] In order to improve the compactness of the structure and avoid unnecessary interference between parts, in the present application, the handle 7 is rotatably mounted on the end of the drive plate 81 of the control assembly through the main shaft 76, and the axis of the main shaft is parallel to the width direction of the seat. At the same time, a clutch mechanism is provided in the handle 7, which is used to control the axial movement of the main shaft 76, thereby achieving clutch with the upper base 3.

[0081] When the main shaft is connected to the upper base 3, the handle 7 can be rotated but cannot move forward and backward. At this time, by rotating the handle 7, the driving block 101 can be driven to move downward, and then the driven block 102 can be pushed outward, so that the driven block is disengaged from the limiting hole 20 and unlocked. At this time, the upper base 3 (seat 41) is allowed to rotate around the rotation axis, and the orientation of the seat can be adjusted; when the main shaft is separated from the upper base 3, the handle 7 can be moved forward and backward. Through the forward and backward movement of the handle 7, the driving plate 81 is driven to move forward and backward, and then the movement of the first slider or the second slider can be realized, that is, the locking and unlocking of the first locking bolt assembly or the second locking bolt assembly can be realized, ensuring the flexible adjustment and firm fixation of the seat in multiple directions, thereby improving the user experience.

[0082] See also Figures 8 - 9, the clutch mechanism includes a pressing block 71, a sliding plate 75 and a connecting rod assembly. The pressing block 71 is arranged on the side wall of the pull handle 7, preferably at the front end of the pull handle 7. The sliding plate 75 is horizontally slidably fitted in the pull handle 7, and its sliding direction is parallel to the sliding direction of the driving plate, that is, sliding back and forth. The connecting rod assembly is arranged between the pressing block 71 and the sliding plate 75 for realizing the linkage between the two. An inclined guide groove 750 is provided on the sliding plate 75. At the same time, a third dial rod 761 is provided on the side wall of the main shaft 76. The third dial rod 761 is sleeved in the inclined guide groove 750. Through the sliding of the sliding plate 75, the axial sliding of the main shaft can be driven to realize the connection or separation from the upper base 3. The connecting rod assembly includes a first connecting rod 72 and a third connecting rod 74. Both the first connecting rod 72 and the third connecting rod 74 are hinged in the pull handle 7. The head of the first connecting rod 72 is hinged on the pressing block 71. The tail of the first connecting rod 72 is hinged to the head of the third connecting rod 74 through a second connecting rod 73. The tail of the third connecting rod 74 is hinged to the sliding plate 75. The sliding plate 75 can be driven to slide by the pressing block 71. Specifically, by pressing the pressing block 71, the sliding plate 75 can be driven to slide backward through the connecting rod assembly, and then the main shaft 76 moves axially inward, so that the end of the main shaft 76 disengages from the connecting hole of the upper base 3 to realize separation. On the contrary, when the pressing block 71 is released, the sliding plate 75 moves forward under the action of the spring, and the main shaft 76 moves axially outward to reconnect with the upper base 3. In order to improve the running stability and operation smoothness, a fourth elastic member is provided on the pressing block 71, or a fourth elastic member is provided on the sliding plate 75, or fourth elastic members are provided on both the pressing block and the sliding plate at the same time. The fourth elastic member is a compression spring, which makes the sliding plate 75 have a forward movement tendency, that is, makes the main shaft have a tendency to connect with the upper base.

[0083] The working principle in the present application is described below;

[0084] When the seat orientation needs to be adjusted, rotate the front end of the pull handle 7 upward. The pushing portion 77 at the tail of the pull handle pushes the driving block 101 downward. Under the action of the inclined plane, the driven block 102 moves outward, and then moves out of the limiting hole 20 to realize separation. At this time, the upper base 3 (seat 41) can rotate freely. After adjusting to the ideal position, release the pull handle 7. The driving block 101 resets under the action of the spring, and the driven block 102 re-enters the limiting hole 20 to realize locking, ensuring the stability of the seat.

[0085] When it is necessary to adjust the front - rear tilt of the seat, first press the pressing block 71. The slide plate 75 moves backward through the connecting rod assembly. Under the action of the inclined guide groove 750, the third lever 761 pushes the main shaft 76 to move inward, separating the main shaft 76 from the upper base 3. At this time, the pull handle can drive the driving plate to move, pushing the pull handle 7 forward to drive the driving plate forward. Under the action of the first guide groove, it can trigger the first slider 831 to slide inward, and then the first locking portion at the end of the first slider 831 disengages from the second locking portion on the seat, unlocking the seat. At this time, the seat can be adjusted for the front - rear tilt; when adjusted to the appropriate position, the driving plate resets under the action of the spring, and the first slider 831 is locked again; then release the pressing block 71, the slide plate 75 resets under the action of the spring, and the main shaft 76 moves outward to reconnect with the upper base 3, realizing the locking of the pull handle.

[0086] When it is necessary to adjust the front - rear distance of the backrest, first press the pressing block 71. The slide plate 75 moves backward through the connecting rod assembly. Under the action of the inclined guide groove 750, the third lever 761 pushes the main shaft 76 to move inward, separating the main shaft 76 from the upper base 3. At this time, the pull handle can drive the driving plate to move, pushing the pull handle 7 backward to drive the driving plate backward. Under the action of the second guide groove, it can trigger the second slider 831 to slide inward, driving the lifting seat to move upward through the guiding block, pushing up the support rod 92, driving the first lever 93 to rotate around the axis, and making the end thereof disengage from the locking groove on the mounting seat, realizing unlocking. At this time, the mounting seat is adjusted back and forth, that is, the front - rear distance of the backrest is adjusted; when adjusted to the appropriate position, the driving plate resets under the action of the spring, the second slider is locked again, driving the end of the first lever to fit with the locking groove again; then release the pressing block 71, the slide plate 75 resets under the action of the spring, and the main shaft 76 moves outward to reconnect with the upper base 3, realizing the locking of the pull handle.

[0087] The adjustable baby stroller of the present invention can adjust the front-back tilt of the seat, enabling the child to be in different postures such as lying flat, semi-reclining or upright, adapting to the physiological needs of different age groups, enhancing comfort and functionality, protecting the baby during travel, improving the riding comfort, and providing a good user experience; it can move the backrest back and forth to adapt to the growth of the child's height or body shape changes, dynamically adapt to the child's growth, optimize the leg space, strengthen the back support, improve the riding comfort at the same time, and has a long applicable age range, extending the service life of the stroller and reducing the replacement cost; the seat orientation is adjustable, which can change the child's orientation, enhancing parent-child interaction and sense of security, and can flexibly cope with environmental changes such as weather adaptability and terrain safety, greatly improving the use safety and experience; the locking component is designed to be controlled by a single control component, with a compact structure and a small installation space, improving the operation reliability and stability, and being convenient and labor-saving to operate; the adjustable baby stroller of the present invention has a compact structure, is convenient and labor-saving to operate, can effectively meet the changing riding needs during the child's growth process, improve the convenience of family travel, ensure the safety and health of the child, and has a good use effect and experience.

[0088] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An adjustable baby stroller, characterized in that, Comprising: A base, fixed to the vehicle frame and serving as the mounting carrier of the seat assembly; A seat assembly, including a seat mounted on the base and a backrest mounted at the rear end of the seat. The seat is slidably and arc-shapedly fitted on the top of the base and can adjust the front-back tilt angle of the seat; A first latch assembly, disposed between the base and the seat, for fixing the seat on the base; A control assembly, connected to the first latch assembly, for driving the first latch assembly to act.

2. The adjustable baby stroller according to claim 1, wherein: The first latch assembly includes a first slider and a first elastic member. The first slider is slidably fitted on the base and its sliding direction is parallel to the rotation axis of the seat. A first locking portion is provided at the end of the first slider. A second locking portion capable of connecting with the first locking portion is provided on the seat. The second locking portions are multiple and are arranged in an arc around the rotation axis of the seat; the first elastic member makes the first slider tend to move closer to the second locking portion; a first lever for connecting with the control assembly is provided on the side wall of the first slider.

3. The adjustable baby stroller according to claim 1, wherein: The control assembly includes a driving plate slidably fitted on the base. The sliding direction of the driving plate is perpendicular to the sliding direction of the first slider on the first latch assembly. A first guide groove for inserting the first lever on the first latch assembly and guiding the sliding of the first slider is formed on the driving plate.

4. The adjustable baby stroller according to claim 1, characterized in that: Mounting seats capable of moving back and forth are slidably fitted on both sides of the seat. The backrest is mounted on the mounting seats. A second latch assembly, which is connected to the control assembly and used for fixing the mounting seats, is provided between the base and the seat.

5. The adjustable baby stroller according to claim 1, wherein: The second latch assembly includes a second slider, a lifting seat, a first lever and a second elastic member. The second slider is slidably fitted on the base and its sliding direction is parallel to the rotation axis of the seat. A first guiding block is provided at the end of the second slider. The first guiding block is connected to the lifting seat slidably fitted vertically on the base and is used for guiding the up and down movement of the lifting seat. A second lever for connecting with the control assembly is provided on the side wall of the second slider; the first lever is rotatably mounted on the seat. A lock tongue is formed at the head of the first lever. Multiple lock grooves for the lock tongue to be inserted into from bottom to top are formed on the mounting seat. A support rod in contact with the lifting seat is hinged to the tail of the first lever. The second elastic member makes the lock tongue tend to move closer to the lock groove.

6. The adjustable baby stroller according to claim 1, wherein: A second guide groove for inserting the second lever on the second latch assembly and guiding the sliding of the second slider is formed on the driving plate of the control assembly.

7. The adjustable baby stroller according to claim 1, wherein: The first guide groove and the second guide groove on the driving plate of the control assembly face in opposite directions and enable the two movement directions of the driving plate to trigger the first latch assembly and the second latch assembly respectively.

8. The adjustable baby stroller according to claim 1, characterized in that: The base includes a lower base for connecting with the vehicle frame and an upper base rotatably mounted on the lower base. The rotation axis of the upper base is perpendicular to the horizontal plane. The seat is mounted on the upper base. A third latch assembly, which is used for fixing the upper base on the lower base and realizing rotational limit, is provided on the upper base.

9. The adjustable baby stroller according to claim 1, wherein: The third locking bolt assembly includes a driving block, a driven block and a handle. The contact surface between the driving block and the driven block is an inclined surface. A pushing portion for contacting the driving block is provided at the tail of the handle. When the handle is rotated, the pushing portion can push the driving block to move and enable the driven block to move out of the limiting hole on the side wall of the lower base and achieve separation.

10. The adjustable baby stroller according to claim 1, wherein: The handle is rotatably mounted at the end of the driving plate of the control assembly through a main shaft. A clutch mechanism for controlling the axial movement of the main shaft to achieve the engagement and disengagement with the upper base is provided in the handle.

11. The adjustable baby stroller according to claim 1, wherein: The clutch mechanism includes a pressing block provided on the side wall of the handle, a sliding plate slidably fitted in the handle, and a connecting rod assembly provided between the pressing block and the sliding plate to realize the linkage between the two. An inclined guide groove is formed on the sliding plate, and a third shifting lever is provided on the side wall of the main shaft. The third shifting lever is sleeved in the inclined guide groove.

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