Stroller

Abstract

The invention relates to a baby stroller. The stroller according to the present invention comprises: a bottom tube; the lower end of the front foot pipe is rotationally connected with the front end of the bottom pipe; the lower end of the rear leg pipe is rotationally connected with the rear end of the bottom pipe; the lower end of the push handle is rotationally connected with the upper end of the front foot pipe; the sliding piece is arranged on the front foot pipe in a sliding mode, and the sliding piece is rotationally connected with the upper end of the rear foot pipe; one end of the first linkage piece is rotationally connected with the push handle, and the other end of the first linkage piece is rotationally connected with the sliding piece. The stroller has the advantages that the size of the frame is small after the stroller is folded, and folding is convenient and fast.

Description

Technical Field

[0001] This invention relates to the field of infant and child products, and in particular to a children's stroller. Background Technology

[0002] As the baby stroller market matures, consumers are demanding more from them, requiring lightweight designs and compact folding sizes. Most existing strollers are heavy and inconvenient to carry. While some models achieve lighter weight, their overall structure is often flimsy, making folding and unfolding difficult and resulting in irregular dimensions when folded. Therefore, there is a strong desire for a lightweight stroller frame that is easy to fold and unfold, has a simple structure, and folds into a compact size. Summary of the Invention

[0003] Therefore, the purpose of this invention is to provide a children's stroller that has the advantages of a small frame size after folding and convenient folding.

[0004] A stroller includes: a base tube; a front leg tube, the lower end of which is rotatably connected to the front end of the base tube; a rear leg tube, the lower end of which is rotatably connected to the rear end of the base tube; a push handle, the lower end of which is rotatably connected to the upper end of the front leg tube; a slider, which is slidably disposed on the front leg tube and rotatably connected to the upper end of the rear leg tube; and a first linkage, one end of which is rotatably connected to the push handle and the other end of which is rotatably connected to the slider.

[0005] Furthermore, the stroller also includes a seat post and a second linkage. The rear end of the seat post is rotatably connected to the front leg post, one end of the second linkage is rotatably connected to the seat post, and the other end of the second linkage is rotatably connected to the sliding member.

[0006] Furthermore, the stroller includes a rear wheel seat, which is rotatably connected to the lower end of the rear foot tube.

[0007] Furthermore, the bottom tube, the rear leg tube, and the rear wheel seat are rotatably connected to each other at the same point. A second joint is provided at the connection point of the bottom tube, the rear leg tube, and the rear wheel seat. The second joint includes a rear leg joint, a wheel seat joint, a second locking element, and a second elastic element. The rear leg joint is located at the lower end of the rear leg tube, and the wheel seat joint is located at the upper end of the rear wheel seat. The wheel seat joint and the rear leg joint are rotatably connected. One of the wheel seat joint and the rear leg joint has a third locking groove, and the other of the wheel seat joint and the rear leg joint is movably provided with the second locking element. The second elastic element is used to drive the second locking element to insert into the third locking groove; the second locking element has a third working position and a fourth working position. When the second locking element is in the third working position, the second locking element is inserted into the third locking groove, and the wheel seat joint and the rear foot joint are locked to each other, preventing the rear foot tube from rotating relative to the rear wheel seat; when the second locking element is in the third working position, the second locking element is separated from the third locking groove, releasing the locking state of the wheel seat joint and the rear foot joint, allowing the rear wheel seat to rotate relative to the rear foot tube.

[0008] Furthermore, the rear foot joint and the wheel seat joint engage to form a communicating second chamber, and the second locking member moves within the second chamber; the third locking groove is a plurality of third wheel grooves provided on the inner peripheral wall of the rear foot joint, and the outer peripheral wall of the second locking member is provided with a plurality of second wheel teeth, which mesh with the third wheel grooves; the push rod joint and the other of the front foot joints have a fourth locking groove, and the second locking member meshes with the fourth locking groove, and the second locking member moves within the fourth locking groove; the fourth locking groove is a plurality of fourth wheel grooves provided on the inner peripheral wall of the wheel seat joint, and the second wheel teeth mesh with the fourth wheel grooves; when the second locking member is in the third working position, the second wheel teeth mesh with both the third wheel groove and the fourth wheel groove, preventing the rear foot tube from rotating relative to the rear wheel seat; when the second locking member is in the fourth working position, the second wheel teeth disengage from the third wheel groove and fully retract into the fourth wheel groove, allowing the rear wheel seat to rotate relative to the rear foot tube.

[0009] Furthermore, the second joint also includes a second driving member, which is fixed on the bottom tube and rotatably connected to the rear foot joint. The second driving member, the rear foot joint, and the wheel seat joint are sequentially engaged to form a communicating second chamber. The second locking member moves within the second chamber. The surface of the second locking member near the second driving member has a groove with a third inclined surface. The surface of the second driving member near the second locking member has a protrusion inserted into the groove with a fourth inclined surface. The fourth inclined surface cooperates with the third inclined surface to drive the second locking member to move.

[0010] Furthermore, the stroller includes a first joint, which is disposed between the front leg tube and the push handle. The first joint includes a front leg joint, a push rod joint, a first locking member, and a first elastic member. The front leg joint is disposed at the upper end of the front leg tube, and the push rod joint is disposed at the lower end of the push handle. The push rod joint is rotatably connected to the front leg joint. One of the push rod joint and the front leg joint has a first locking groove, and the other of the push rod joint and the front leg joint is movably provided with the first locking member. The first elastic member is used to drive the first locking member to insert into the first locking groove. The first locking member has a first working position and a second working position. When the first locking member is in the first working position, the first locking member is inserted into the first locking groove, and the push rod joint and the front foot joint are locked together, preventing the front foot tube from rotating relative to the push handle. When the first locking member is in the second working position, the first locking member is separated from the first locking groove, releasing the locking state of the push rod joint and the front foot joint, allowing the push handle to rotate relative to the front foot tube.

[0011] Furthermore, the forefoot joint and the push rod joint engage to form a communicating first chamber, and the first locking member moves within the first chamber; the first joint also includes a first driving member, which is movably disposed within the first chamber, the moving direction of the first driving member is perpendicular to the moving direction of the first locking member, the first driving member has a first inclined surface, and the first locking member has a second inclined surface, the first inclined surface and the second inclined surface cooperate to drive the first locking member to move.

[0012] Furthermore, the push handle includes a lower push rod and an upper push rod. The push rod joint is located at the lower end of the lower push rod, and the upper push rod is telescopically disposed within the lower push rod. During the process of the upper push rod retracting into the lower push rod, the lower end of the upper push rod can abut against the first driving member to push the first driving member to move.

[0013] Further, the forefoot joint and the push rod joint engage to form a communicating first chamber, and the first locking member moves within the first chamber; the first locking groove is a plurality of first wheel grooves provided on the inner peripheral wall of the forefoot joint, and the outer peripheral wall of the first locking member is provided with a plurality of first wheel teeth, the first wheel teeth engaging with the first wheel grooves; the push rod joint and the other of the forefoot joints have a second locking groove, the first locking member engaging with the second locking groove, and the first locking member moving within the second locking groove; the second locking groove is a plurality of second wheel grooves provided on the inner peripheral wall of the push rod joint, the first wheel teeth engaging with the second wheel teeth. The grooves engage; when the first locking member is in the first working position, the first wheel tooth engages simultaneously with the first wheel groove and the second wheel groove, preventing the front leg tube from rotating relative to the push handle; when the first locking member is in the second working position, the first wheel tooth disengages from the first wheel groove and fully retracts into the second wheel groove, allowing the push handle to rotate relative to the front leg tube; the stroller also includes two bottom tubes, the front end of one bottom tube is rotatably connected to the front leg tube on the left side of the stroller, and the front end of the other bottom tube is rotatably connected to the front leg tube on the right side of the stroller, and the rear ends of the two bottom tubes are connected by a horizontal tube.

[0014] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a perspective view of the stroller described in the embodiment; Figure 2a This is a schematic diagram of the stroller before it is folded, as described in the embodiment. Figure 2b This is a schematic diagram showing the upper push rod of the stroller described in the embodiment retracted into the lower push rod. Figure 2c This is a schematic diagram illustrating the folding process of the stroller described in the embodiment. Figure 2d This is a schematic diagram of the folded state of the stroller described in the embodiment; Figure 3 This is an exploded view of the first joint described in the embodiment; Figure 4 This is an exploded view of the first joint described in the embodiment from another perspective; Figure 5 for Figure 4 An enlarged view of point A in the diagram; Figure 6 This is an exploded schematic diagram of the first and second joints described in the embodiment; Figure 7 This is an exploded view of the second joint described in the embodiment; Figure 8 for Figure 7 Enlarged diagram of point B in the diagram; Figure label: 1. Front leg tube; 11. Sliding member; 12. Front wheel; 2. Rear leg tube; 21. Rear wheel; 22. Rear wheel seat; 3. Push handle; 31. Lower push rod; 32. Upper push rod; 4. Bottom tube; 41. Horizontal tube; 5. Seat tube; 6. First linkage; 7. Second linkage; 8. First joint; 81. Front leg joint; 811. First locking groove; 82. Push rod joint; 821. Second locking groove; 83. First locking member; 831. First 832. Gear tooth; 84. Second inclined surface; 85. First elastic element; 86. First driving element; 87. First inclined surface; 98. Second joint; 99. Rear foot joint; 911. Third locking groove; 90. Wheel seat joint; 921. Fourth locking groove; 91. Second locking element; 92. Second locking tooth; 932. Groove; 933. Third inclined surface; 94. Second elastic element; 95. Second driving element; 951. Protrusion; 952. Fourth inclined surface. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0017] It should be understood that in the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. That is, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, unless otherwise stated, "a plurality of" means two or more.

[0018] It should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "set up," "connected," "linked," and "hollow" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0019] See Figure 1 This embodiment of a stroller includes a front leg tube 1, a sliding member 11, a rear leg tube 2, a push handle 3, and a first linkage 6. The lower end of the front leg tube 1 is rotatably connected to a front wheel 12. The sliding member 11 is slidably mounted on the front leg tube 1. The upper end of the rear leg tube 2 is rotatably connected to the sliding member 11, and the lower end of the rear leg tube 2 is rotatably connected to a rear wheel 21. The lower end of the push handle 3 is rotatably connected to the upper end of the front leg tube 1. One end of the first linkage 6 is rotatably connected to the push handle 3, and the other end of the first linkage 6 is rotatably connected to the sliding member 11. Figures 2a to 2d As shown, when the stroller needs to be folded, push the handle 3 forward to rotate. The handle 3 drives the slider 11 to move downward along the front leg tube 1 through the first linkage 6. After the slider 11 moves to the lower end of the front leg tube 1, the rear leg tube 2 and the front leg tube 1 come together. The front leg tube 1, the rear leg tube 2, and the handle 3 are stacked together. The overall volume of the folded stroller is small.

[0020] Based on this, the stroller may also include a base tube 4. The front end of the base tube 4 is rotatably connected to the lower end of the front leg tube 1, and the rear end of the base tube 4 is rotatably connected to the lower end of the rear leg tube 2. For example... Figures 2a to 2d As shown, when the stroller needs to be folded, the push handle 3 is pushed forward to rotate. The push handle 3 drives the slider 11 to move downward along the front leg tube 1 via the first linkage 6. Furthermore, during the rotation of the push handle 3, the entire frame receives a downward force, causing the front leg tube 1 to move closer to the bottom tube 4. Simultaneously, during the movement of the slider 11, the slider 11 also drives the rear leg tube 2 to move closer to the bottom tube 4, thus achieving rapid folding of the entire stroller. In this embodiment, the stroller has two bottom tubes 4, located on the left and right sides of the stroller respectively. The front end of the left bottom tube 4 is rotatably connected to the left front leg tube 1 of the stroller, and the rear end of the left bottom tube 4 is rotatably connected to the left rear leg tube 2 of the stroller. The front end of the right bottom tube 4 is rotatably connected to the right front leg tube 1 of the stroller, and the rear end of the right bottom tube 4 is rotatably connected to the right rear leg tube 2 of the stroller. The rear ends of the two bottom tubes 4 are connected by a horizontal tube 41.

[0021] Additionally, the stroller may include a seat post 5 and a second linkage 7. The rear end of the seat post 5 is rotatably connected to the front leg tube 1, and the front end of the seat post 5 is a free end. One end of the second linkage 7 is rotatably connected to the slider 11, and the other end of the second linkage 7 is rotatably connected to the middle of the seat post 5. For example... Figures 2a to 2d As shown, during the folding process of the stroller, the slider 11 moves downward along the front leg tube 1. The slider 11 pulls the seat tube 5 towards the front leg tube 1 through the second linkage 7, thereby realizing the rapid folding of the entire stroller.

[0022] In addition, the stroller may also include a rear wheel seat 22, the upper end of which is rotatably connected to the lower end of the rear leg tube 2, and the lower end of the rear wheel seat 22 is rotatably connected to the aforementioned rear wheel 21. For example... Figures 2a to 2d As shown, during the folding process of the stroller, the rear wheel seat 22 is driven to rotate clockwise, that is, the rear wheel seat 22 moves closer to the rear leg tube 2. After the stroller is fully folded, the rear wheel seat 22 is located below the rear leg tube 2 and also below the bottom tube 4. Through this design, the overall volume of the folded stroller can be further reduced.

[0023] See Figure 1 and Figure 3-6 A first joint 8 is provided at the rotatable connection between the front leg tube 1 and the push handle 3. The first joint 8 includes a front leg joint 81, a push rod joint 82, a first locking member 83, and a first elastic member 84. The front leg joint 81 is located at the upper end of the front leg tube 1. The push rod joint 82 is located at the lower end of the push handle 3, and the push rod joint 82 is rotatably connected to the front leg joint 81. One of the push rod joint 82 and the front leg joint 81 has a first locking groove 811, and the other of the push rod joint 82 and the front leg joint 81 is movably provided with the aforementioned first locking member 83. The first locking member 83 has a first working position and a second working position. When the first locking member 83 is in the first working position, it is inserted into the first locking groove 811, and the push rod joint 82 and the front foot joint 81 are locked together, preventing the front foot tube 1 from rotating relative to the push handle 3. When the first locking member 83 is in the second working position, it separates from the first locking groove 811, releasing the locking state between the push rod joint 82 and the front foot joint 81, allowing the push handle 3 to rotate relative to the front foot tube 1. The first elastic member 84 is used to drive the first locking member 83 to insert into the first locking groove 811, keeping the first locking member 83 in the first working position.

[0024] In this embodiment, the forefoot joint 81 and the push rod joint 82 engage to form a communicating first chamber. The first locking member 83 moves within the first chamber. One of the push rod joint 82 and the forefoot joint 81 has a first locking groove 811, and the other of the push rod joint 82 and the forefoot joint 81 has a second locking groove 821. The first locking member 83 reciprocates between the first locking groove 811 and the second locking groove 821. Specifically, the first locking groove 811 is a plurality of first wheel grooves provided on the inner peripheral wall of the forefoot joint 81, and the outer peripheral wall of the first locking member 83 is provided with a plurality of first wheel teeth 831. The second locking grooves are a plurality of second wheel grooves provided on the inner peripheral wall of the push rod joint 82. The first wheel teeth 831 engage with the first wheel grooves and engage with the second wheel grooves. When the first locking member 83 is in the first working position, the first gear tooth 831 engages with the first gear groove and the second gear groove simultaneously, preventing the front foot tube 1 from rotating relative to the push handle 3; when the first locking member 83 is in the second working position, the first gear tooth 831 disengages from the first gear groove and the first gear tooth 831 completely retracts into the second gear groove, allowing the push handle 3 to rotate relative to the front foot tube 1.

[0025] Besides the locking methods described above, other locking methods can also be used. For example, the first locking element 83 can be a pin, and the first locking groove 811 can be a hole. The pin is slidably disposed in one of the push rod joint 82 and the front foot joint 81, and the hole is disposed in the other of the push rod joint 82 and the front foot joint 81. The pin can slide into the hole to lock the push rod joint 82 and the front foot joint 81. Alternatively, the first locking element 83 can be a hook, and the first locking groove 811 can be a hole or a hanging post. The hook is rotatably disposed in one of the push rod joint 82 and the front foot joint 81, and the hole or hanging post is disposed in the other of the push rod joint 82 and the front foot joint 81. The hook can rotate into the hole or hook onto the hanging post to lock the push rod joint 82 and the front foot joint 81. For details, please refer to Chinese patent numbers CN2424083Y, CN2905586Y, CN203753214U, CN204137084U, CN204055895U, and CN105923036B.

[0026] To facilitate the movement of the first locking member 83, the first joint 8 further includes a first driving member 85. The first driving member 85 is movably disposed within the first cavity, and its movement direction is perpendicular to that of the first locking member 83. The first driving member 85 has a first inclined surface 851, and the first locking member 83 has a second inclined surface 832. The first inclined surface 851 and the second inclined surface 832 cooperate to drive the first locking member 83 to move. During the unlocking process of the first joint 8, the first driving member 85 is driven to move. The first driving member 85, through the cooperation of the first inclined surface 851 and the second inclined surface 832, drives the first locking member 83 to move from a first working position to a second working position.

[0027] Furthermore, to facilitate frame folding and reduce the overall size of the folded frame, the push handle 3 includes a lower push rod 31 and an upper push rod 32. The push rod joint 82 is located at the lower end of the lower push rod 31, and the upper push rod 32 is telescopically located inside the lower push rod 31. When the upper push rod 32 is fully retracted into the lower push rod 31, the lower end of the upper push rod 32 will abut against the first drive member 85 to push the first drive member 85 to move. The first drive member 85 pushes the first locking member 83 to move through the cooperation of the first inclined surface 851 and the second inclined surface 832. The first locking member 83 moves from the first working position to the second working position.

[0028] See Figure 1 and Figure 6-8 A second joint 9 is provided at the rotatable connection between the rear foot tube 2 and the rear wheel seat 22. The second joint 9 includes a rear foot joint 91, a wheel seat joint 92, a second locking member 93, and a second elastic member 94. The rear foot joint 91 is located at the lower end of the rear foot tube 2. The wheel seat joint 92 is located at the upper end of the rear wheel seat 22, and the wheel seat joint 92 is rotatably connected to the rear foot joint 91. One of the wheel seat joint 92 and the rear foot joint 91 has a third locking groove 911, and the other of the wheel seat joint 92 and the rear foot joint 91 is movably provided with the second locking member 93. The second locking member 93 has a third working position and a fourth working position. When the second locking member 93 is in the third working position, it is inserted into the third locking groove 911, and the wheel seat joint 92 and the rear foot joint 91 are locked together, preventing the rear foot tube 2 from rotating relative to the rear wheel seat 22. When the second locking member 93 is in the third working position, it is separated from the third locking groove 911, releasing the locking state between the wheel seat joint 92 and the rear foot joint 91, allowing the rear wheel seat 22 to rotate relative to the rear foot tube 2. The second elastic member 94 is used to drive the second locking member 93 to insert into the third locking groove 911, keeping the second locking member 93 in the third working position.

[0029] In this embodiment, the rear foot joint 91 and the wheel seat joint 92 engage to form a communicating second chamber. The second locking member 93 moves within the second chamber. One of the rear foot joint 91 and the wheel seat joint 92 has a third locking groove 911, and the other of the rear foot joint 91 and the wheel seat joint 92 has a fourth locking groove 921. The second locking member 93 reciprocates between the third locking groove 911 and the fourth locking groove 921. Specifically, the third locking groove 911 is a plurality of third wheel grooves provided on the inner peripheral wall of the rear foot joint 91, and the fourth locking groove 921 is a plurality of fourth wheel grooves provided on the inner peripheral wall of the wheel seat joint 92. The outer peripheral wall of the second locking member 93 is provided with a plurality of second wheel teeth 931, which engage with the third wheel grooves and the fourth wheel grooves. When the second locking member 93 is in the third working position, the second gear tooth 931 simultaneously engages with the third and fourth gear grooves, preventing the rear foot tube 2 from rotating relative to the rear wheel seat 22; when the second locking member 93 is in the fourth working position, the second gear tooth 931 disengages from the third gear groove and fully retracts into the fourth gear groove, allowing the rear wheel seat 22 to rotate relative to the rear foot tube 2.

[0030] Besides the locking methods described above, other locking methods can also be used. For example, the second locking element 93 can be a pin, and the third locking groove 911 can be a hole. The pin is slidably disposed in one of the rear foot joint 91 and the wheel seat joint 92, and the hole is disposed in the other of the rear foot joint 91 and the wheel seat joint 92. The pin can slide into the hole to lock the rear foot joint 91 and the wheel seat joint 92. Alternatively, the second locking element 93 can be a hook, and the third locking groove 911 can be a hole or a pin. The hook is rotatably disposed in one of the rear foot joint 91 and the wheel seat joint 92, and the hole or pin is disposed in the other of the rear foot joint 91 and the wheel seat joint 92. The hook can rotate into the hole or hook onto the pin to lock the rear foot joint 91 and the wheel seat joint 92. For details, please refer to Chinese patent numbers CN2424083Y, CN2905586Y, CN203753214U, CN204137084U, CN204055895U, and CN105923036B.

[0031] To facilitate the movement of the second locking member 93, the second joint 9 also includes a second driving member 95. The second driving member 95 is rotatably connected to the rear foot joint 91. The second driving member 95, the rear foot joint 91, and the wheel seat joint 92 are sequentially engaged to form a connected second chamber. The second locking member 93 moves within the second chamber. A groove 932 is provided on the surface of the second locking member 93 near the second driving member 95. The groove 932 has a third inclined surface 933. A protrusion 951 is provided on the surface of the second driving member 95 near the second locking member 93. The protrusion 951 is inserted into the groove 932 and has a fourth inclined surface 952. The fourth inclined surface 952 cooperates with the third inclined surface 933 to drive the second locking member 93 to move. During the unlocking process of the second joint 9, the second driving member 95 and the second locking member 93 rotate relative to each other. The second driving member 95 drives the second locking member 93 to move from the third working position to the fourth working position through the cooperation of the third inclined surface 933 and the fourth inclined surface 952.

[0032] Furthermore, for ease of frame folding, the second drive member 95 is fixedly mounted on the bottom tube 4. During the rotation of the rear leg tube 2 relative to the bottom tube 4, because the rear leg joint 91 and the second locking member 93 are engaged with each other, the rear leg tube 2 will drive the second locking member 93 to rotate relative to the second drive member 95. At this time, the second drive member 95 drives the second locking member 93 to move through the cooperation of the third inclined surface 933 and the fourth inclined surface 952. The second locking member 93 moves from the third working position to the fourth working position.

[0033] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A children's stroller, characterized in that, The stroller includes: Bottom tube (4); Front leg tube (1), the lower end of which is rotatably connected to the front end of the bottom tube (4); The lower end of the rear foot tube (2) is rotatably connected to the rear end of the bottom tube (4); Push handle (3), the lower end of which is rotatably connected to the upper end of the front foot tube (1); A sliding member (11) is slidably disposed on the front leg tube (1), and the sliding member (11) is rotatably connected to the upper end of the rear leg tube (2); The first linkage (6) has one end rotatably connected to the push handle (3) and the other end rotatably connected to the sliding member (11).

2. The stroller according to claim 1, characterized in that: The stroller also includes a seat tube (5) and a second linkage (7). The rear end of the seat tube (5) is rotatably connected to the front leg tube (1). One end of the second linkage (7) is rotatably connected to the seat tube (5), and the other end of the second linkage (7) is rotatably connected to the sliding member (11).

3. The stroller according to claim 1, characterized in that: The stroller includes a rear wheel seat (22), which is rotatably connected to the lower end of the rear foot tube (2).

4. The stroller according to claim 3, characterized in that: The bottom tube (4), the rear foot tube (2), and the rear wheel seat (22) are rotatably connected to each other at the same location. A second joint (9) is provided at the connection point of the bottom tube (4), the rear foot tube (2), and the rear wheel seat (22). The second joint (9) includes a rear foot joint (91), a wheel seat joint (92), a second locking member (93), and a second elastic member (94). The rear foot joint (91) is located at the lower end of the rear foot tube (2), and the wheel seat joint (92) is located at the upper end of the rear wheel seat (22). The wheel seat joint (92) is rotatably connected to the rear foot joint (91). One of the wheel seat joint (92) and the rear foot joint (91) has a third locking groove (911). The other of the wheel seat joint (92) and the rear foot joint (91) is movably provided with the second locking member (93). The second elastic member (94) is used to drive the second locking member (93) to insert into the third locking groove (911). The second locking member (93) has a third working position and a fourth working position. When the second locking member (93) is in the third working position, the second locking member (93) is inserted into the third locking groove (911), and the wheel seat joint (92) and the rear foot joint (91) are locked to each other, preventing the rear foot tube (2) from rotating relative to the rear wheel seat (22). When the second locking member (93) is in the third working position, the second locking member (93) is separated from the third locking groove (911), releasing the locking state of the wheel seat joint (92) and the rear foot joint (91), allowing the rear wheel seat (22) to rotate relative to the rear foot tube (2).

5. The stroller according to claim 4, characterized in that: The rear foot joint (91) and the wheel seat joint (92) engage to form a communicating second chamber, and the second locking member (93) moves within the second chamber; The third locking groove (911) is a plurality of third wheel grooves provided on the inner peripheral wall of the rear foot joint (91), and the outer peripheral wall of the second locking member (93) is provided with a plurality of second wheel teeth (931), which mesh with the third wheel groove; The push rod joint (82) and the other of the front foot joint (81) have a fourth locking groove (921), the second locking member (93) engages with the fourth locking groove (921), and the second locking member (93) moves within the fourth locking groove (921); The fourth locking groove (921) is a plurality of fourth wheel grooves provided on the inner peripheral wall of the wheel seat joint (92). The second wheel tooth (931) meshes with the fourth wheel groove. When the second locking member (93) is in the third working position, the second wheel tooth (931) meshes with the third wheel groove and the fourth wheel groove at the same time, and does not allow the rear foot tube (2) to rotate relative to the rear wheel seat (22). When the second locking member (93) is in the fourth working position, the second wheel tooth (931) disengages from the third wheel groove and the second wheel tooth (931) completely retracts into the fourth wheel groove, allowing the rear wheel seat (22) to rotate relative to the rear foot tube (2).

6. The stroller according to claim 5, characterized in that: The second joint (9) further includes a second driving member (95), which is fixed on the bottom tube (4). The second driving member (95) is rotatably connected to the rear foot joint (91). The second driving member (95), the rear foot joint (91), and the wheel seat joint (92) are sequentially engaged to form a connected second chamber. The second locking member (93) moves within the second chamber. The surface of the second locking member (93) near the second driving member (95) is provided with a groove (932). The groove (932) has a third inclined surface (933). The surface of the second driving member (95) near the second locking member (93) is provided with a protrusion (951). The protrusion (951) is inserted into the groove (932). The protrusion (951) has a fourth inclined surface (952). The fourth inclined surface (952) cooperates with the third inclined surface (933) to drive the second locking member (93) to move.

7. The stroller according to claim 1, characterized in that: The stroller includes a first joint (8), which is disposed between the front leg tube (1) and the push handle (3). The first joint (8) includes a front leg joint (81), a push rod joint (82), a first locking member (83), and a first elastic member (84). The front leg joint (81) is disposed at the upper end of the front leg tube (1), and the push rod joint (82) is disposed at the lower end of the push handle (3). The push rod joint (82) is rotatably connected to the front leg joint (81). One of the push rod joint (82) and the front leg joint (81) has a first locking groove (811), and the other of the push rod joint (82) and the front leg joint (81) is movably provided with the first locking member (83). The first elastic member (84) is used to drive the first locking member (83) to insert into the first locking groove (811). The first locking member (83) has a first working position and a second working position. When the first locking member (83) is in the first working position, the first locking member (83) is inserted into the first locking groove (811), and the push rod joint (82) and the front foot joint (81) are locked to each other, preventing the front foot tube (1) from rotating relative to the push handle (3). When the first locking member (83) is in the second working position, the first locking member (83) is separated from the first locking groove (811), releasing the locking state of the push rod joint (82) and the front foot joint (81), allowing the push handle (3) to rotate relative to the front foot tube (1).

8. The stroller according to claim 7, characterized in that: The forefoot joint (81) and the push rod joint (82) engage to form a communicating first chamber, and the first locking member (83) moves within the first chamber; the first joint (8) also includes a first driving member (85), which is movably disposed within the first chamber, and the moving direction of the first driving member (85) is perpendicular to the moving direction of the first locking member (83). The first driving member (85) has a first inclined surface (851), and the first locking member (83) has a second inclined surface (832). The first inclined surface (851) and the second inclined surface (832) cooperate to drive the first locking member (83) to move.

9. The stroller according to claim 8, characterized in that: The push handle (3) includes a lower push rod (31) and an upper push rod (32). The push rod joint (82) is located at the lower end of the lower push rod (31). The upper push rod (32) is telescopically located inside the lower push rod (31). During the process of the upper push rod (32) retracting into the lower push rod (31), the lower end of the upper push rod (32) can abut against the first driving member (85) to push the first driving member (85) to move.

10. The stroller according to claim 7, characterized in that: The forefoot joint (81) and the push rod joint (82) engage to form a communicating first chamber, and the first locking member (83) moves within the first chamber; The first locking groove (811) is a plurality of first wheel grooves provided on the inner peripheral wall of the front foot joint (81), and the outer peripheral wall of the first locking member (83) is provided with a plurality of first wheel teeth (831), which mesh with the first wheel grooves. The push rod joint (82) and the other of the front foot joint (81) have a second locking groove (821), the first locking member (83) engages with the second locking groove (821), and the first locking member (83) moves within the second locking groove (821); The second locking groove (821) is a plurality of second wheel grooves provided on the inner peripheral wall of the push rod joint (82). The first wheel tooth (831) meshes with the second wheel groove. When the first locking member (83) is in the first working position, the first wheel tooth (831) meshes with both the first wheel groove and the second wheel groove, preventing the front foot tube (1) from rotating relative to the push handle (3). When the first locking member (83) is in the second working position, the first wheel tooth (831) disengages from the first wheel groove and completely retracts into the second wheel groove, allowing the push handle (3) to rotate relative to the front foot tube (1). The stroller also includes two bottom tubes (4). The front end of one bottom tube (4) is rotatably connected to the front leg tube (1) on the left side of the stroller, and the front end of the other bottom tube (4) is rotatably connected to the front leg tube (1) on the right side of the stroller. The rear ends of the two bottom tubes (4) are connected by a horizontal tube (41).

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