stroller

Abstract

The present disclosure relates to a stroller including a stroller frame, a seat assembly, a support rod set, and a locking mechanism. The seat assembly is movably disposed on the stroller frame and configured to seat a child. The support rod set is movably connected to the stroller frame and the seat assembly, respectively. The support rod set is configured to adjust the height of the seat assembly. The locking mechanism selectively locks or unlocks the support rod set so that the seat assembly is fixed at a height position or the height of the seat assembly is adjustable. The stroller seat height can be easily and flexibly adjusted.

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates to the field of child carrier technology, and more particularly to strollers. [Background technology]

[0002] In recent years, strollers have become a necessity for families with children. Most strollers currently on the market have seat heights that cannot be adjusted, that is, the seat height remains fixed relative to the ground, which cannot meet children's requirements for observing the surrounding environment with a higher field of view and is not suitable for children of different heights to sit on. Summary of the Invention [Problem to be solved by the invention]

[0003] Therefore, there is a need to provide a stroller in which the seat height can be easily and flexibly adjusted. [Means for solving the problem]

[0004] The stroller includes a stroller frame, a seat assembly, a support rod set, and a locking mechanism. The seat assembly is movably disposed on the stroller frame and configured to seat a child. The support rod set is movably coupled to the stroller frame and the seat assembly, respectively. The support rod set is configured to adjust the height of the seat assembly. The locking mechanism selectively locks or unlocks the support rod set so that the seat assembly is fixed at a height position or the height of the seat assembly is adjustable.

[0005] The stroller seat assembly is movably disposed on the stroller frame, and the height of the seat assembly can be adjusted via a support rod set movably connected between the stroller frame and the seat assembly, which can meet children's requirements for observing the surrounding environment from different perspectives and can also be suitable for children of different heights to sit on. The support rod set can be locked or unlocked via a locking mechanism, so that the user can unlock the support rod set for adjustment when the height of the seat assembly needs to be adjusted, or lock the support rod set when the seat assembly is adjusted to an appropriate height, and fix the seat assembly at the appropriate height.

[0006] In one embodiment, at least two sets of support rods are provided, and the locking mechanism selectively locks or unlocks the at least two sets of support rods in synchronization.

[0007] In one embodiment, the support rod set comprises a first lifting rod and a second lifting rod pivotally connected to each other, with opposite ends of the first lifting rod movably connected to the stroller frame and the seat assembly, respectively, and opposite ends of the second lifting rod movably connected to the stroller frame and the seat assembly, respectively.

[0008] In one embodiment, one end of a first lifting rod is pivotally connected to the stroller frame, the other end of the first lifting rod is slidably connected to the seat assembly, one end of a second lifting rod is movably connected to the stroller frame, and the other end of the second lifting rod is pivotally connected to the seat assembly.

[0009] In one embodiment, the stroller further comprises a slide assembly, the slide assembly being slidable relative to the stroller frame, and opposite ends of the second lifting rod being movably coupled to the slide assembly and the seat assembly, respectively.

[0010] In one embodiment, the stroller further comprises a sliding assembly, the stroller frame comprising a horizontally arranged support rod, the sliding assembly being slidable relative to the support rod, one end of a second lifting rod being pivotally connected to the sliding assembly, and the other end of the second lifting rod being pivotally connected to the seat assembly.

[0011] In one embodiment, the stroller frame includes a connecting rod, the connecting rod fixedly connected to the support rod, a sliding assembly spaced from the connecting rod, the sliding assembly movable toward or away from the connecting rod, and one end of the first lifting rod pivotally connected to the connecting rod.

[0012] In one embodiment, the sliding assembly comprises a sliding rod and a sliding seat fixed to one end of the sliding rod, the sliding seat further cylindrically encasing the support rod and being slidable along the support rod, and one end of a second lifting rod pivotally connected to the sliding seat.

[0013] In one embodiment, one end of the first lifting rod is pivotally connected to the stroller frame, the seat assembly is provided with a sliding groove, and the other end of the first lifting rod has a sliding pin fixed thereto, which is inserted into the sliding groove and is movable along the sliding groove.

[0014] In one embodiment, the stroller further comprises a sliding assembly, the sliding assembly being slidable relative to the stroller frame, and a locking mechanism disposed on the sliding assembly, the locking mechanism selectively locking the sliding assembly relative to the stroller frame or allowing the sliding assembly to slide relative to the stroller frame.

[0015] In one embodiment, the locking mechanism comprises: a locking member movably disposed within the slide assembly; an operating member disposed on the slide assembly and drivingly coupled to the locking member; Equipped with The stroller frame is provided with a plurality of locking recesses, and the operating member is operable to disengage the locking member from any of the locking recesses.

[0016] In one embodiment, the stroller frame includes a horizontally arranged support rod, and a plurality of locking recesses are arranged on the support rod and positioned along the length of the support rod, and when the operating member is operated, the locking member disengages from one of the locking recesses and the sliding assembly becomes slidable along the support rod.

[0017] In one embodiment, the locking mechanism further includes a lead pin, the lead pin being fixed to the locking member, the operating member being provided with a first drive groove, the lead pin being inserted into the first drive groove and being movable along the first drive groove, and when the operating member is operated, the lead pin being movable along the first drive groove in a direction away from the support rod.

[0018] In one embodiment, the extension direction of the first driving groove intersects with the movement direction of the locking member, and the extension direction of the first driving groove intersects with the direction in which the operating member is operated.

[0019] In one embodiment, the locking mechanism further comprises a cover assembly, the cover assembly defining a storage space, at least a portion of the operating member being movably disposed within the storage space, and another portion of the operating member being extendable outward from the storage space for operation.

[0020] In one embodiment, the cover assembly is provided with a second drive groove, the second drive groove extending along the movement direction of the locking member, and the lead pin is inserted into the second drive groove and is movable along the second drive groove.

[0021] In one embodiment, the locking mechanism further includes a first reset member that biases the locking member to move in a direction to engage with one of the locking recesses.

[0022] In one embodiment, the stroller further comprises an accidental contact prevention mechanism, the accidental contact prevention mechanism having a locked state and an unlocked state, and when the accidental contact prevention mechanism is in the locked state, the locking mechanism continues to lock the support rod set, and when the accidental contact prevention mechanism is in the unlocked state, the locking mechanism is operable to unlock the support rod set.

[0023] In one embodiment, the stroller further includes an accidental contact prevention mechanism that cylindrically covers the sliding assembly and is movable along the sliding assembly, the accidental contact prevention mechanism having a locked state and an unlocked state, and when the accidental contact prevention mechanism is in the locked state, the operating member cannot be operated to disengage the locking member from any of the locking recesses, and when the accidental contact prevention mechanism is in the unlocked state, the operating member can be operated to disengage the locking member from any of the locking recesses.

[0024] In one embodiment, the accidental contact prevention mechanism comprises: An operation unit; a protrusion that can come into contact with an operating member; Equipped with When the accidental contact prevention mechanism is in a locked state, the protrusion can abut against the operating member, making the operating member inoperable, and when the accidental contact prevention mechanism is in an unlocked state, the protrusion is separated from the operating member, making the operating member operable, and the operating member can be operated to switch the accidental contact prevention mechanism from the locked state to the unlocked state.

[0025] In one embodiment, the accidental contact prevention mechanism further includes a second reset member, and the second reset member biases the protrusion to abut against the operating member.

[0026] In one embodiment, two sets of support rods are provided, one on each side of the seat assembly.

[0027] In one embodiment, the stroller further comprises a sliding assembly, the stroller frame comprising two horizontally arranged support rods, the sliding assembly being slidable relative to the support rods.

[0028] In one embodiment, each of the support rod sets includes a first lifting rod and a second lifting rod pivotally connected to each other, with both ends of each of the two first lifting rods movably connected to the stroller frame and the seat assembly, respectively, and both ends of the sliding assembly pivotally connected to one end of each of two second lifting rods, with the other end of each of the two second lifting rods movably connected to the seat assembly.

[0029] In one embodiment, the locking mechanism comprises: two locking members respectively movably disposed within the slide assembly, the two locking members moving in opposite directions; an operating member disposed on the slide assembly and drivably coupled to each of the two locking members; Equipped with Each of the two support rods is provided with a plurality of locking recesses, and the operating member is operable to allow the two locking members to be disengaged from any of the locking recesses on the two support rods.

[0030] In one embodiment, the locking mechanism further includes a first reset member, both ends of which abut against the two locking members, respectively, and the first reset member biases the two locking members toward the two support rods, respectively.

[0031] In one embodiment, the intermediate portion of the first lifting rod is pivotally connected to the intermediate portion of the second lifting rod.

[0032] In one embodiment, the locking mechanism comprises: A first operating member; a first threaded coupling member; a rotating member provided with a second thread that threadably couples with the first thread; a drive assembly disposed between the first operating member and the rotation member; Equipped with The first operating member is operable, via the drive assembly, to drive the rotation member to rotate relative to the coupling member.

[0033] In one embodiment, the stroller frame includes a connecting rod, the sliding assembly is spaced apart from the connecting rod, one of the connecting member and the rotating member is disposed on the connecting rod, and the other of the connecting member and the rotating member is disposed on the sliding assembly, and when the rotating member rotates relative to the connecting member, the sliding assembly moves toward or away from the connecting rod.

[0034] In one embodiment, the support rod set comprises a first lifting rod and a second lifting rod pivotally connected to one another, with opposite ends of the first lifting rod movably connected to the connecting rod and the seat assembly, respectively, and opposite ends of the second lifting rod movably connected to the slide assembly and the seat assembly, respectively.

[0035] In one embodiment, one end of the connecting member is fixed to the connecting rod, the other end of the connecting member is provided with a first thread, one end of the rotating member is provided with a second thread, and the other end of the rotating member is rotatably connected to the sliding assembly.

[0036] In one embodiment, the locking mechanism comprises: a second operating member having a first operating position and a second operating position; two drive assemblies are provided, the first drive assembly and the second drive assembly, respectively; When the second operating member is in a first operating position, the first operating member is operable via the first drive assembly to drive the rotating member to rotate relative to the coupling member along a first rotational direction, and when the second operating member is in a second operating position, the first operating member is operable via the second drive assembly to drive the rotating member to rotate relative to the coupling member along a second rotational direction, the first rotational direction being opposite to the second rotational direction.

[0037] In one embodiment, when the rotating member rotates relative to the connecting member along a first rotational direction, the distance between the connecting rod and the sliding assembly decreases and the height of the seat assembly increases, and when the rotating member rotates relative to the connecting member along a second rotational direction, the distance between the connecting rod and the sliding assembly increases and the height of the seat assembly decreases.

[0038] In one embodiment, the other end of the rotating member remote from the second thread is provided with a third gear portion; The first drive assembly includes: a first drive member that is driven into engagement with the second operating member; a first gear having a first gear portion meshable with a third gear portion; Equipped with The second drive assembly a second drive member that is driven into engagement with the second operating member; a second gear having a second gear portion meshable with the third gear portion; Equipped with When the second operating member is in a first operating position, the first operating member is operable to drive the third gear portion of the first gear via the first drive member to rotate along a first rotation direction, and when the second operating member is in a second operating position, the second operating member is operable to drive the third gear portion of the second gear via the second drive member to rotate along a second rotation direction.

[0039] In one embodiment, the second operating member further has a third operating position, and when the second operating member is in the third operating position, the first operating member is operated and the rotating member and the connecting member are fixed relative to each other.

[0040] In one embodiment, the first gear section meshes with the third gear section, the first drive member is switchable between a first drive position and a first spaced position, and when the first drive member is in the first drive position, the first operating member is operable to drive and rotate the first gear via the first drive member, and when the first drive member is in the first spaced position, the first drive member is spaced from the first gear;

[0041] The second gear portion meshes with the third gear portion, the second drive member is switchable between a second drive position and a second spaced position, and when the second drive member is in the second drive position, the first operating member is operable to drive and rotate the second gear via the second drive member, and when the second drive member is in the second spaced position, the second drive member is spaced from the second gear.

[0042] In one embodiment, when the second operating member moves to the first operating position, the second operating member drives the first drive member to move from the first spaced position to the first drive position, the second operating member drives the second drive member to move from the second drive position to the second spaced position, when the second operating member moves to the second operating position, the second operating member drives the first drive member to move from the first drive position to the first spaced position, and the second operating member drives the second drive member to move from the second spaced position to the second drive position.

[0043] In one embodiment, the locking mechanism further includes a third reset member adapted to bias the second operating member to move the second operating member toward the first operating position or the second operating position.

[0044] In one embodiment, the third gear section meshes unidirectionally with the first gear section and the second gear section, respectively, or the first gear meshes unidirectionally with the first drive member and the second gear meshes unidirectionally with the second drive member.

[0045] In one embodiment, the first operating member is rotatably disposed on the slide assembly, and the first drive member and the second drive member are both disposed outside the slide assembly and rotate coaxially with the first operating member, the first operating member being switchable between a first rotational position and a second rotational position, and when the second operating member is in the first operating position, the first drive member drives the first gear to rotate synchronously while the first operating member rotates from the first rotational position to the second rotational position, and the first gear is fixed relative to the slide assembly while the first operating member rotates from the second rotational position to the first rotational position, and when the second operating member is in the second operating position, the second drive member drives the second gear to rotate synchronously while the first operating member rotates from the first rotational position to the second rotational position, and the second gear is fixed relative to the slide assembly while the first operating member rotates from the second rotational position to the first rotational position.

[0046] In one embodiment, the surface of the first drive member facing the first gear has first main teeth, the surface of the first gear facing the first drive member has first auxiliary teeth, and the first main teeth mesh with the first auxiliary teeth in one direction; the surface of the second drive member facing the second gear has second main teeth, and the surface of the second gear facing the second drive member has second auxiliary teeth, and the second main teeth mesh with the second auxiliary teeth in one direction.

[0047] In one embodiment, the locking mechanism further includes a fourth reset member adapted to bias the first operating member to move the first operating member from the second rotational position to the first rotational position.

[0048] In one embodiment, the first drive member and the second drive member are both located within the hollow internal cavity of the first operating member, the first operating member has an operating port connected to the hollow internal cavity, the first drive member has a first movable end, the first movable end having a first guide groove, the second drive member has a second movable end, the second movable end having a second guide groove, the locking mechanism further includes a guide post, one end of the guide post is fixed to the second operating member and the other end of the guide post is inserted into the first guide groove and the second guide groove through the operating port, the extension direction of the operating port is the same as the movement direction of the first drive member and the second drive member, the operating port has a first side wall and a second side wall, when the second operating member is in the first operating position, the guide post abuts against the first side wall, and when the second operating member is in the second operating position, the guide post abuts against the second side wall.

[0049] In one embodiment, the locking mechanism further comprises a third reset member, the third reset member being a torsion spring, one end of the torsion spring being fixed to the guide post and the other end of the torsion spring being fixed to the first operating member, the third reset member being adapted to bias the second operating member to move the second operating member towards the first operating position or the second operating position.

[0050] In one embodiment, the first drive member and the second drive member have an integrally formed structure.

[0051] In one embodiment, the surface of the first gear facing the third gear has third main teeth, the surface of the third gear facing the first gear has third auxiliary teeth, and the third main teeth mesh with the third auxiliary teeth in one direction; the surface of the second gear facing the third gear has fourth main teeth, and the surface of the third gear facing the second gear has fourth auxiliary teeth, and the fourth main teeth mesh with the fourth auxiliary teeth in one direction.

[0052] In one embodiment, the locking mechanism further includes a fixed seat, the fixed seat being fixed to the sliding assembly, the rotating member being rotatably disposed on the fixed seat, and the drive assembly and the first operating member being movably disposed on the fixed seat. [Brief explanation of the drawings]

[0053] [Figure 1] 1 is a schematic structural diagram of a stroller according to one embodiment of the present disclosure, with the seat assembly in a relatively low position. [Figure 2] 2 is another schematic structural view of the stroller shown in FIG. 1, with the seat assembly in a relatively high position. [Figure 3] FIG. 2 is a side view of the stroller shown in FIG. [Figure 4] FIG. 3 is a side view of the stroller shown in FIG. 2. [Figure 5] 2 is a schematic structural diagram of the stroller shown in FIG. 1 in a folded state. [Figure 6] 3 is a schematic structural diagram of the stroller shown in FIG. 2 in a folded state. [Figure 7] FIG. 2 is an enlarged view of a portion A in FIG. [Figure 8] FIG. 3 is an enlarged view of a portion B of FIG. [Figure 9] FIG. 10 is a partial exploded view of the locking mechanism and sliding assembly. [Figure 10] FIG. 4 is a partial cross-sectional view taken along line CC in FIG. [Figure 11] FIG. 11 is an enlarged view of a portion D in FIG. [Figure 12] FIG. 11 is an enlarged view of a portion E in FIG. [Figure 13] FIG. 10 is a partial cross-sectional view of a stroller according to another embodiment of the present disclosure. [Figure 14] FIG. 14 is an enlarged view of F in FIG. 13, showing the accidental contact prevention mechanism in a locked state. [Figure 15] FIG. 14 is an enlarged view of F in FIG. 13, with the accidental contact prevention mechanism in an unlocked state. [Figure 16] FIG. 10 is a schematic structural diagram of a stroller according to another aspect of the present disclosure. [Figure 17] FIG. 17 is a side view of FIG. 16, with the seat assembly in a relatively low position. [Figure 18] FIG. 18 is another side view of FIG. 17, with the seat assembly in a relatively high position. [Figure 19] 17 is a schematic structural diagram of the stroller frame, seat assembly, support assembly, sliding assembly, and part of the locking mechanism of FIG. 16. FIG. [Figure 20] FIG. 20 is a schematic structural diagram of the structure shown in FIG. 19 without the backrest. [Figure 21] FIG. 21 is a schematic structural diagram of the structure shown in FIG. 20 without the seat assembly. [Figure 22] FIG. 22 is an exploded view of the structure shown in FIG. 21 without the support rods and connecting rods. [Figure 23] FIG. 23 is an enlarged view of the first drive assembly shown in FIG. 22. [Figure 24] 22 is an exploded view of the structure shown in FIG. 21 without the support rods and connecting rods, taken from another perspective. [Figure 25] FIG. 25 is an enlarged view of the second drive assembly shown in FIG. 24. [Figure 26] 22 is a partially exploded view of the structure shown in FIG. 21 without the support rods and connecting rods, taken from yet another perspective. [Figure 27] FIG. 22 is a top view of FIG. [Figure 28] 22 is a cross-sectional view taken along line G-G in FIG. 21, showing the second operating member in the first operating position. [Figure 29] 22 is another cross-sectional view taken along line G-G of FIG. 21, with the second operating member in the second operating position. [Figure 30] FIG. 29 is an enlarged view of a portion I of FIG. 28. [Figure 31] FIG. 30 is an enlarged view of a portion J in FIG. 29. DETAILED DESCRIPTION OF THE INVENTION

[0054] In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present disclosure and do not limit the protection scope of the present disclosure.

[0055] When an element is said to be "fixed to" another element, the element may be directly disposed on the other element, or intermediate elements may be present. When an element is said to be "coupled to" another element, the element may be directly coupled to the other element, or intermediate elements may coexist. As used herein, the terms "vertical," "horizontal," "left," "right," and similar expressions are for illustrative purposes only and do not represent specific implementations.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art of the present disclosure. The terms used in the specification of the present disclosure are for the purpose of describing particular embodiments only and are not intended to limit the present disclosure. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0057] In one aspect of the present disclosure, a stroller is provided, wherein the height of a seat assembly 200 of the stroller can be conveniently and flexibly adjusted, as shown in Figures 1 to 15 .

[0058] Specifically, as shown in FIG. 1, the stroller includes a stroller frame 100, a seat assembly 200, a support rod set 310, a sliding assembly 320, a locking mechanism 400, a handle 500, a front wheel assembly 600, and a rear wheel assembly 700.

[0059] Specifically, as shown in FIG. 1 , the stroller frame 100 includes an armrest assembly 110, a front wheel frame 120, a rear wheel frame 130, a support rod 140, and a connecting rod 150. The armrest assembly 110 has a generally U-shaped structure and includes a front armrest 111 and two side armrests 112 connected to both ends of the front armrest 111. Both the front wheel frame 120 and the rear wheel frame 130 have a generally H-shaped structure. The two upper ends of the front wheel frame 120 are connected to the two side armrests 112, respectively. The two lower ends of the front wheel frame 120 are connected to the two front wheel assemblies 600, respectively. The two upper ends of the rear wheel frame 130 are connected to the two side armrests 112, respectively. The two lower ends of the rear wheel frame 130 are connected to the two rear wheel assemblies 700, respectively. The two upper ends of the front wheel frame 120 and the two upper ends of the rear wheel frame 130 are close to each other, while the two lower ends of the front wheel frame 120 and the two lower ends of the rear wheel frame 130 are spaced apart from each other to form a stable triangular support. Two support rods 140 are provided, located on the left and right sides of the stroller frame 100, respectively, and extend along the front-to-rear direction of the stroller frame 100. Both ends of each support rod 140 are connected to the front wheel frame 120 and the rear wheel frame 130, respectively. A connecting rod 150 extends along the left-to-right direction of the stroller frame 100, and both ends of the connecting rod 150 are connected to either side of the rear wheel frame 130, respectively, or both ends of the connecting rod 150 are connected to the two support rods 140, respectively. It should be understood that directions such as "up," "down," "left," "right," "forward," and "backward" referred to herein are based on the stroller being used as a reference.

[0060] 1, the handle 500 has a generally U-shaped structure and includes a handle body 510 and two handle bars 520 connected to both ends of the handle body 510. Each handle bar 520 is connected to the side armrest 112 and the rear wheel frame 130 on the same side, allowing a user to push and move the stroller frame 100 via the handle 500.

[0061] Furthermore, as shown in FIG. 1 , a seat assembly 200 is movably disposed on the stroller frame 100 and configured to carry a child. The seat assembly 200 includes a seat frame 210, a seat rod 220, and a seat body (not shown). Two seat frames 210 are provided, and the two seat frames 210 are movably disposed on the left and right sides of the stroller frame 100, respectively, extending along the front and rear sides of the stroller frame 100 and positioned above two support rods 140, respectively. The seat rod 220 is a generally S-shaped tube and is sinusoidally connected between the two support rods 140. The seat body covers the seat post 220 for a child to sit on.

[0062] Furthermore, the support rod set 310 is movably connected to the stroller frame 100 and the seat assembly 200, respectively, and is configured to adjust the height of the seat assembly 200. For example, FIGS. 1 and 3 show the stroller seat assembly 200 in a state where it is in a relatively low position, and FIGS. 2 and 4 show the stroller seat assembly 200 in a state where it is in a relatively high position. Of course, the stroller seat assembly 200 may have more than just the two heights shown in FIGS. 1 to 4. That is, the seat assembly 200 may have two or more adjustable heights as needed. The stroller of the present disclosure is a foldable stroller. FIGS. 5 and 6 show schematic structural diagrams of the stroller in a folded state where the seat assembly 200 is in a relatively low position and a relatively high position, respectively.

[0063] 7, two support rod sets 310 are provided, one on each side of the seat assembly 200. Each support rod set 310 is connected between the support rod 140 on the same side and the seat frame 210 on the same side. Of course, in other embodiments, the number of support rod sets 310 may alternatively be more or less than two, and the setting positions thereof may alternatively be adjusted as needed.

[0064] For example, one support rod set 310 is provided. As shown in FIGS. 7 and 8 , the support rod set 310 specifically includes a first lifting rod 311 and a second lifting rod 312. The first lifting rod 311 and the second lifting rod 312 are pivotally connected to each other at a pivot point M in an X-shape. In this embodiment, an approximately middle portion of the first lifting rod 311 is pivotally connected to an approximately middle portion of the second lifting rod 312. Of course, in other embodiments, the pivot positions of the first lifting rod 311 and the second lifting rod 312 may be alternatively adjusted as needed. The lower end of the first lifting rod 311 is pivotally connected to the connecting rod 150, and the upper end of the first lifting rod 311 is movably disposed in front of the seat frame 210. Specifically, a strip-shaped sliding groove 211 may be provided on the front side of the seat frame 210, the sliding groove 211 extending horizontally along the front-rear direction of the stroller frame 100, and a sliding pin 313 is fixed to the upper end of a first lifting rod 311, which is inserted into the sliding groove 211 and can move along the sliding groove 211. In this way, the upper end of the first lifting rod 311 can move back and forth relative to the seat frame 210. The lower end of the second lifting rod 312 is pivotally connected to the sliding assembly 320, and the upper end of the second lifting rod 312 is pivotally connected to the opposite rear side of the seat frame 210.

[0065] Specifically, as shown in FIG. 7 , the sliding assembly 320 includes a sliding rod 321 and sliding seats 322 fixed to both ends of the sliding rod 321. The sliding rod 321 has a hollow rod structure. As shown in FIG. 9 , each sliding seat 322 has a first sleeve portion 322a and a second sleeve portion 322b that are connected and communicate with each other. The first sleeve portion 322a and the second sleeve portion 322b are arranged at an angle. In this embodiment, the first sleeve portion 322a and the second sleeve portion 322b are arranged perpendicular to each other. Both ends of the sliding rod 321 are inserted into and fixed to the first sleeve portions 322a of the two sliding seats 322, respectively. The two second sleeve portions 322b of the two sliding seats 322 cylindrically surround the two support rods 140, respectively, and can move along the two support rods 140, respectively. Therefore, the sliding assembly 320 can move back and forth relative to the two support rods 140. Of course, in other embodiments, the movement of the sliding assembly 320 may alternatively be realized in other ways. For example, a guide groove may be arranged in each of the two support rods 140, and a guide pin that can be inserted into and move along the guide groove may be arranged at each end of the sliding rod 321. In this embodiment, the lower ends of the two second lifting rods 312 are pivotally coupled to the corresponding sliding seats 322, respectively, and more specifically, are pivotally coupled to the first sleeve portions 322a of the corresponding sliding seats 322.

[0066] Therefore, when the sliding assembly 320 moves back and forth relative to the two support rods 140, the lower end of the second lifting rod 312 may move to a different position relative to the support rod 140 on the same side. As shown in FIGS. 7 and 8 , in this case, because the lower end of the first lifting rod 311 is pivotally connected to the fixed connecting rod 150, the distance between the lower end of the first lifting rod 311 and the lower end of the second lifting rod 312 may increase or decrease. As the position of the lower end of the second lifting rod 312 moves, the upper end of the second lifting rod 312 may also pivot around the pivot point M accordingly. As a result, the seat frame 210 connected to the upper end of the second lifting rod 312 moves along the up-down direction of the stroller frame 100, i.e., the height of the seat assembly 200 changes, thereby adjusting the height of the seat assembly 200. At the same time, the seat frame 210 drives the upper end of the first lifting rod 311 connected thereto to move up and down, while also driving the upper end of the first lifting rod 311 to move in the front-to-rear direction of the stroller frame 100 through cooperation between the sliding groove 211 and the sliding pin 313, thereby driving the lower end of the first lifting rod 311 to pivot together about the pivot point M. The angle between the first lifting rod 311 and the second lifting rod 312 can be changed. In the present disclosure, the distance between the sliding assembly 320 and the connecting rod 150 is controlled by sliding the sliding assembly 320 relative to the connecting rod 150, thereby controlling and changing the angle between the first lifting rod 311 and the second lifting rod 312, and adjusting the height of the seat assembly 200.

[0067] In a first aspect of the present disclosure, a locking mechanism 400 is provided, as shown in Figures 9 and 10. The locking mechanism 400 selectively locks or unlocks the support rod set 310 so that the seat assembly 200 is fixed in a height position or the height of the seat assembly 200 is adjustable.

[0068] Specifically, the locking mechanism 400 includes a locking member 410, an operating member 420, a cover assembly 430, and a first reset member 440. In this embodiment, two locking members 410 are provided, each having a rod-like structure. The two locking members 410 are movably disposed inside the sliding rod 321, extending along the length of the sliding rod 321, and moving in opposite directions. Lugs 411 are provided at the ends of the two locking members 410 that are spaced apart from each other, and the two support rods 140 are each provided with a plurality of locking recesses 141 (locking holes in this embodiment). The lugs 411 can be inserted into any of the locking recesses 141 via the communication holes 322c (as shown in FIG. 11) between the first sleeve portion 322a and the second sleeve portion 322b. Each locking member 410 can move toward or away from the support rod 140 on the corresponding side, so that the lug 411 is inserted into or disengaged from any locking recess 141 on the support rod 140 on the corresponding side.

[0069] 9 to 11, taking the left side of the stroller as an example, when the lug 411 of the locking member 410 is inserted into a different locking recess 141, the sliding assembly 320 is fixed at different positions relative to the two support rods 140. That is, the lower end of the second lifting rod 312 is fixed at a different position relative to the support rod 140 on the same side. As shown in FIGS. 7 and 8, in this case, the lower end of the first lifting rod 311 is pivotally connected to the fixed connecting rod 150, so the distance between the lower ends of the first lifting rod 311 and the second lifting rod 312 can increase or decrease. As the position of the lower end of the second lifting rod 312 moves, the upper end of the second lifting rod 312 can also pivot around the pivot point M accordingly. As a result, the seat frame 210 connected to the upper end of the second lifting rod 312 moves in the vertical direction of the stroller frame 100, that is, the height of the seat assembly 200 changes. At the same time, the seat frame 210 drives the upper end of the first lifting rod 311 connected thereto to move up and down, while also driving the upper end of the first lifting rod 311 to move in the front-to-rear direction of the stroller frame 100 through cooperation between the sliding groove 211 and the sliding pin 313, thereby driving the lower end of the first lifting rod 311 to pivot together around the pivot point M. Thus, the height of the seat assembly 200 is adjusted.

[0070] 9 and 10, a cover assembly 430 is disposed on the outside and fixed to the sliding rod 321. The cover assembly 430 includes a first cover 431 and a second cover 432 that can be interlocked with each other. The first cover 431 and the second cover 432 define a storage space. At least a portion of the operating member 420 is movably disposed within the storage space, and another portion of the operating member 420 can extend outward from the storage space for operation. In this embodiment, the operating member 420 is an unlocking button. Specifically, the operating member 420 has a hollow storage structure and includes a first storage portion 421 and a second storage portion 422 that are diametrically opposed to each other, and a U-shaped connecting portion 423 that is connected between the first storage portion 421 and the second storage portion 422. A slot 424 is formed between the first storage portion 421 and the second storage portion 422. When the operating member 420 moves relative to the sliding rod 321, the sliding rod 321 is at least partially disposed within the slot 424. The operating member 420 can be pushed to move in a direction F1 that intersects the extension direction of the sliding rod 321. In this embodiment, the operating member 420 can be pushed to move in a direction perpendicular to the sliding rod 321. The operating member 420 is provided with a first drive groove 425. The first drive groove 425 penetrates both the first accommodating portion 421 and the second accommodating portion 422. In this embodiment, two first drive grooves 425 are provided, and the extension directions of the two first drive grooves 425 intersect the movement direction F1 of the operating member 420 and also intersect the extension direction of the sliding rod 321. Specifically, the extension directions of the two first drive grooves 425 gradually move away from each other along the direction F1 in which the operating member 420 is pushed.

[0071] 9 and 10 , lead pins 450 are fixed to the ends of the two locking members 410 that are close to each other. The two lead pins 450 pass through the sliding rod 321, are inserted into the two first drive grooves 425, and can move along the two first drive grooves 425. Therefore, when the operating member 420 is pressed in direction F1, the two lead pins 450 move closer to each other along the two first drive grooves 425, causing the lugs 411 of the two locking members 410 that were originally inserted into the locking recesses 141 to be disengaged from the inserted locking recesses 141, and the locking mechanism 400 unlocks the support rod set 310. In this case, the height of the seat assembly 200 can be adjusted by pushing and pulling the sliding assembly 320 back and forth.

[0072] 9 , the first cover 431 is further provided with two second drive grooves 431a, which extend along the extension direction of the sliding rod 321. Specifically, to ensure smooth movement of the lead pins 450, the second cover 432 is also provided with two corresponding second drive grooves 431a. The middle portions of the two lead pins 450 are inserted into the two first drive grooves 425, respectively, and can move along the two first drive grooves 425, respectively. The ends of the two lead pins 450 are inserted into the upper and lower second drive grooves 431a of the first cover 431 and the second cover 432, respectively, and can move along the two second drive grooves 431a, respectively. The arrangement of the second drive grooves 431a can further restrict the lead pins 450 from moving toward or away from each other along the extension direction of the sliding rod 321.

[0073] 9 and 12, the first reset member 440 is disposed between the two locking members 410, and both ends of the first reset member 440 abut against the adjacent ends of the two locking members 410. In this manner, the first reset member 440 continuously moves the two locking members 410 toward the support rod 140. That is, after the external force pressing the operating member 420 is removed, the lugs 411 of the two locking members 410 can be automatically inserted into the corresponding locking recesses 141 under the action of the first reset member 440, thereby fixing the seat assembly 200 at the required height. At the same time, the interaction between the two lead pins 450 and the two first driving grooves 425 can also drive and automatically reset the operating member 420. In this embodiment, the first reset member 440 is a spring.

[0074] Therefore, in the above embodiment, the locking members 410 on both sides can be simultaneously unlocked from the corresponding locking recesses 141 via the operating member 420, and the support rod sets 310 on both sides can be driven to pivot synchronously by the movement of the sliding rod 321, thereby realizing synchronous adjustment of the heights of the left and right sides of the seat assembly 200. On the one hand, the height adjustment process of the seat assembly 20 is smoother. On the other hand, it is also easy to adjust the height of the seat assembly 200 with one hand, making the operation process simpler and more convenient. In another embodiment, as shown in FIGS. 13 and 14 , the child carrier may further be provided with an accidental contact prevention mechanism 800 to prevent accidental unlocking of the locking mechanism 400 caused by incorrect operation of the operating member 420. In this embodiment, the accidental contact prevention mechanism 800 includes a moving sleeve 810 and a second reset member 820. The second reset member 820 is disposed in the storage space. The moving sleeve 810 is disposed outside the sliding rod 321 and can move along the sliding rod 321. An operating portion 811 protruding from the cover assembly 430 is provided on one side of the moving sleeve 810. In this embodiment, the operating portion 811 is a push button. A protrusion 812 is provided on the other side of the moving sleeve 810. When the operating portion 811 is not operated, the protrusion 812 abuts against the connecting portion 423. In this case, even if the operating member 420 is pressed in direction F1, the operating member 420 cannot move. This prevents accidental unlocking of the locking mechanism 400 caused by erroneous operation of the operating member 420. When the operating portion 811 is pressed in direction F2 (in this embodiment, direction F2 is parallel to the extension direction of the sliding rod 321), the protrusion 812 moves away from the connecting portion 423, as shown in FIG. 15 . Specifically, protrusion 812 moves to the left of coupling portion 423 and is no longer in contact with coupling portion 423. That is, accidental contact prevention mechanism 800 switches from the locked state to the unlocked state. In this case, it can be moved by operating operating member 420.That is, the locking mechanism 400 can unlock the support rod set 310 only when both the operating portion 811 and the operating member 420 are operated. Therefore, accidental unlocking of the locking mechanism 400 can be prevented, thereby improving the safety performance of the stroller. Of course, in other embodiments, the accidental contact prevention mechanism 800 may alternatively be omitted.

[0075] 14, the second reset member 820 constantly abuts the protrusion 812 against the operating member 420. Specifically, the second reset member 820 is disposed on the outside of the sliding rod 321, and both ends of the second reset member 820 abut against the cover assembly 430 and the moving sleeve 810, respectively, and the second reset member 820 is located on the side of the protrusion 812 away from the operating member 811. In other words, the second reset member 820 is constantly pressed against the protrusion 812 in the direction opposite to direction F2. In this embodiment, the second reset member 820 is a spring.

[0076] The height adjustment process of the seat assembly 200 of the stroller is specifically as follows.

[0077] 13 and 14, when the operating portion 811 is first pressed in direction F2, the protrusion 812 moves in direction F2 without contacting the connecting portion 423, as shown in FIG. 15. This causes the second reset member 820 to compress and deform, switching the accidental contact prevention mechanism 800 to the unlocked state. Next, when the operating member 420 is pressed in direction F1, the two lead pins 450 on the two locking members 410 move toward each other under the action of the two first drive grooves 425 and the two second drive grooves 431a. The two locking members 410 then move away from the corresponding support rod 140 until the lugs 411 on the two locking members 410 disengage from the corresponding locking recesses 141. At the same time, the first reset member 440 is compressed. Therefore, the locking members 410 on both sides of the locking mechanism 400 can be simultaneously unlocked via one of the operating members 420, which is convenient for operation. 7 and 8, the height of the seat assembly 200 can be adjusted via the support rod set 310, i.e., the sliding rod 321 can be pushed or pulled along the front-to-rear direction of the stroller frame 100, causing the sliding seats 322 at both ends of the sliding rod 321 to move along the support rods 140 on both sides. Taking the left side of the stroller as an example, the lower end of the second lifting rod 312 pivotally connected to the sliding seat 322 also moves to a different position relative to the support rod 140 on the same side. In this case, because the lower end of the first lifting rod 311 is pivotally connected to the fixed connecting rod 150, the distance between the lower ends of the first lifting rod 311 and the second lifting rod 312 can increase or decrease. As the position of the lower end of the second lifting rod 312 moves, the upper end of the second lifting rod 312 can also pivot around the pivot point M accordingly, so that the seat frame 210 connected to the upper end of the second lifting rod 312 moves along the vertical direction of the stroller frame 100, i.e., the height of the seat assembly 200 changes.At the same time, the seat frame 210 drives the upper end of the first lifting rod 311 connected thereto to move up and down, while also driving the upper end of the first lifting rod 311 to move in the front-to-rear direction of the stroller frame 100 through cooperation between the sliding groove 211 and the sliding pin 313, thereby driving the lower end of the first lifting rod 311 to pivot together around the pivot point M. Thus, the height of the seat assembly 200 is adjusted.

[0078] 15, when the seat assembly 200 is adjusted to an appropriate height by moving the sliding rod 321, the external force applied to the operating portion 811 and the operating member 420 can be canceled out, and the two locking members 410 are reset under the elastic force of the first reset member 440, so that the lugs 411 on the two locking members 410 are inserted into the corresponding locking recesses 141 of the other, thereby fixing the seat assembly 200 at the new height. At the same time, under the action of the two lead pins 450 and the two first drive grooves 425 and the two second drive grooves 431a, the operating member 420 is also reset in the direction opposite to direction F1. At the same time, under the elastic force of the second reset member 820, the movable sleeve 810 is also reset in the direction opposite to direction F2, the accidental contact prevention mechanism 800 switches to the locked state, and the protrusion 812 of the movable sleeve 810 abuts against the connecting portion 423 of the operating member 420 again (as shown in Figure 14).

[0079] In a second aspect of the present disclosure, a stroller is provided. As shown in Figures 16 to 27, this stroller also includes a stroller frame 100, a seat assembly 200, a support rod set 310, a sliding assembly 320, a locking mechanism 400, a handle 500, a front wheel assembly 600, and a rear wheel assembly 700. The structures of the stroller frame 100, the seat assembly 200, the support rod set 310, the sliding assembly 320, the handle 500, the front wheel assembly 600, and the rear wheel assembly 700 of the stroller in this embodiment are the same as those of the previous embodiment, and the only difference lies in the specific structure of the locking mechanism 400.

[0080] Specifically, as shown in Figures 19 to 22, the locking mechanism includes a fixed sheet 910, a rotating member 920, a first operating member 930, a drive assembly, a second operating member 940, a third reset member 951, a fourth reset member 952, a guide post 960 (see Figure 26), and a connecting member 160.

[0081] 21 and 22, the fixing sheet 910 has a generally U-shaped structure and includes a first fixing portion 911 and second fixing portions 912 connected to both ends of the first fixing portion 911. An engagement hook 9121 is provided on each of the two second fixing portions 912 at the ends remote from the first fixing portion 911. The fixing sheet 910 is fixed by engaging with the sliding rod 321 via the two engagement hooks 9121. An attachment hole 9111 is provided in approximately the middle of the first fixing portion 911.

[0082] Furthermore, as shown in FIGS. 22 and 28, the rotating member 920 is rotatably disposed on the fixed sheet 910 and passes through the mounting hole 9111. The rotating member 920 has a generally cylindrical structure. A second screw thread 921 is provided at one end of the rotating member 920. In this embodiment, the second screw thread 921 is an internal thread. A third gear portion 922 is provided at the other end of the rotating member 920. The third gear portion 922 of the rotating member 920 protrudes from the rotating member 920 in the radial direction of the rotating member 920 to form a restricting protrusion 923. When the rotating member 920 is attached to the fixed seat 910, one end of the rotating member 920 having the second thread 921 extends through the mounting hole 9111 toward the connecting rod 150, while the regulating protrusion 923 abuts against the surface of the fixed seat 910 away from the connecting rod 150, so that the third gear portion 922 is restricted to the side of the fixed seat 910 away from the connecting rod 150.

[0083] 27 to 29, one end of the connecting member 160 is fixed to the connecting rod 150, and the other end of the connecting member 160 is provided with a first thread 161 that can be threadably connected to the second thread 921. The other end of the connecting member 160 is connected to one end of the rotating member 920 by a threadable connection between the first thread and the second thread. In this embodiment, the first thread 161 is an external thread. Of course, in other embodiments, the first thread 161 may alternatively be an internal thread, and the second thread 921 is an external thread.

[0084] As shown in FIGS. 28 to 31 , the rotating member 920 can rotate relative to the fixed seat 910 along a first rotational direction R1 or a second rotational direction R2. The first rotational direction R1 is opposite to the second rotational direction R2. In this embodiment, as shown in FIGS. 28 and 30 , the first rotational direction R1 is clockwise. When the rotating member 920 rotates relative to the fixed seat 910 along the first rotational direction R1, the threaded connection between the rotating member 920 and the connecting member 160, i.e., the rotational threaded connection between the first thread 161 and the second thread 921, causes the rotating member 920 to rotate along the first rotational direction R1 and approach the connecting rod 150. The sliding rod 321 is then driven via the fixed seat 910 to move in a direction toward the connecting rod 150, thereby increasing the height of the seat assembly 200. As shown in FIGS. 29 and 31 , the second rotational direction R2 is counterclockwise. When the rotating member 920 rotates relative to the fixed seat 910 in the second rotation direction R2, the threaded connection between the rotating member 920 and the connecting member 160, i.e., the rotational disengagement of the second thread 921 from the first thread 161, causes the rotating member 920 to rotate in the second rotation direction R2 and move away from the connecting rod 150, and then drives the sliding rod 321 to move away from the connecting rod 150 via the fixed seat 910, thereby decreasing the height of the seat assembly 200. Therefore, the threaded connection between the rotating member 920 and the connecting member 160 allows the sliding rod 321 and the connecting rod 150 to move toward or away from each other, thereby achieving stepless adjustment of the height of the seat assembly 200.

[0085] In an embodiment not shown, the set positions of the rotating member 920 and the connecting member 150 may alternatively be interchanged, i.e., the rotating member 920 may be disposed on the connecting rod 150, and the connecting member 150 may be disposed on the fixed seat 910.

[0086] 22 and 24, the first operating member 930 is a pull handle. The pull handle has a generally U-shaped housing structure and includes a pull handle body 931 and a first mounting portion 932 and a second mounting portion 933 connected to both ends of the pull handle body 931. Both the first mounting portion 932 and the second mounting portion 933 pass through the sliding rod 321 and can rotate relative to the sliding rod 321. In this embodiment, both the first mounting portion 932 and the second mounting portion 933 are located between the two second fixed portions 912 of the fixed seat 910. A hollow internal cavity 934 is provided inside the handle, and an operating port 935 that can communicate with the hollow internal cavity 934 is provided in approximately the middle of the pull handle body 931. The first operating member 930 is switchable between a first rotation position and a second rotation position relative to the sliding rod 321. In this embodiment, as shown in Figure 20, the first rotational position of the first operating member 930 is located at a rear lower position of the sliding rod 321. As shown in Figure 21, the first rotational position of the first operating member 930 is located at a front lower position of the sliding rod 321. It should be understood that the terms "upper," "lower," "forward," and "rearward" referred to herein are based on the up-down direction of the stroller in the unfolded state.

[0087] 22 and 28, the fourth reset member 952 is adapted to bias the first operating member 930 to move the first operating member 930 toward the first rotation position. Specifically, the fourth reset member 952 is a second torsion spring, and the spring coil of the second torsion spring is wound around and fixed to a fixing ring 323 located approximately in the middle of the sliding rod 321, and the two free ends of the second torsion spring abut against the first mounting portion 932 and the second mounting portion 933 of the pull handle, respectively. As shown in FIG. 20, in this embodiment, when not operated, the first operating member 930 may be in a rearward and downward position of the sliding rod 321 under the action of the fourth reset member 952. In this position, the first operating member 930 is less likely to be accidentally touched by a child or caregiver, thereby preventing accidental increase or decrease in the height of the seat assembly 200 caused by accidental contact with the first operating member 930.

[0088] 22 and 24, a drive assembly is disposed between the first operating member 930 and the rotating member 920. In this embodiment, two drive assemblies, a first drive assembly 970 and a second drive assembly 980, may be provided. Specifically, the first drive assembly 970 includes a first gear 971 and a first drive member 972, and the second drive assembly 980 includes a second gear 981 and a second drive member 982. As shown in FIG. 26, both the first gear 971 and the second gear 981 are located between the first mounting portion 932 and the second mounting portion 933 of the first operating member 930, and are located on either side of the third gear portion 922. Both the first drive member 972 and the second drive member 982 are located in the hollow interior cavity 934 of the first operating member 930.

[0089] Specifically, as shown in FIGS. 21 and 23 , the first gear 971 has a generally circular sheet-like structure. A first gear portion 9711 capable of meshing with the third gear portion 922 is provided on the surface of the first gear 971 facing the third gear portion 922, and a first auxiliary teeth portion 9712 is provided on the surface of the first gear 971 facing the opposite side from the third gear portion 922. The first driving member 972 has a generally L-shaped structure and includes a first driving body 9721 and a first movable end 9722 that are connected to each other. A first guide groove 9722a is provided in the first movable end 9722. An end of the first driving body 9721 remote from the first movable end 9722 has a first main teeth portion 9721a, which meshes with the first auxiliary teeth portion 9712 in one direction. Specifically, the first main teeth portion 9721a includes a plurality of first main teeth 9721b arranged in the circumferential direction. The first auxiliary teeth portion 9712 includes a plurality of first auxiliary teeth 9712a arranged in the circumferential direction. Each first auxiliary tooth 9712a includes a vertical first tooth surface 9712b and an inclined second tooth surface 9712c, and the second tooth surface 9712c is located in the third rotation direction R3 of the first tooth surface 9712b. Therefore, when the first driving member 972 rotates in the third rotation direction R3, the first driving member 972 can drive and rotate the first gear 971 by the meshing of the first main teeth portion 9721a and the first auxiliary teeth portion 9712. Specifically, each first main tooth 9721b abuts against each first tooth flank 9712b, causing the first driving member 972 to push the first gear 971 to rotate accordingly. When the first driving member 972 rotates in a fourth rotation direction R4 opposite to the third rotation direction R3, the first driving member 972 cannot drive the first gear 971 to rotate due to the meshing of the first main tooth portion 9721a with the first auxiliary tooth portion 9712. Specifically, during rotation of the first driving member 972, each first main tooth 9721b slides along each second tooth flank 9712c, preventing the first driving member 972 from pushing the first gear 971 to rotate accordingly.

[0090] In this embodiment, as shown in FIGS. 22 and 23 , the first driver 9721 is mounted in the hollow internal cavity 934 at the first mounting portion 932, and the first movable end 9722 is located in the hollow internal cavity 934 of the pull handle body 931. The first guide groove 9722a of the first movable end 9722 is at least partially exposed through the operation port 935 (as shown in FIG. 26 ). The first driver 972 is switchable between a first driving position and a first spaced position. When the first driver 972 is in the first driving position, the first operating member 930 is operable to drive and rotate the first gear 971 via the first driver 972. Specifically, when the first driving member 972 is in the first driving position, the first main teeth 9721a of the first driving member 972 penetrates the hollow internal cavity 934 (as shown in FIG. 30) and can mesh with the first auxiliary teeth 9712 of the first gear 971. When the first driving member 972 is in the first separated position, the first driving member 972 is separated from the first gear 971. In this case, even if the first operating member 930 is operable, it cannot drive and rotate the first gear 971 via the first driving member 972. Specifically, when the first driving member 972 is in the first separated position, the first main teeth 9721a retreats to the hollow internal cavity 934 so as to be separated from the first gear 971 (as shown in FIG. 31).

[0091] 21, 24, and 25, the second gear 981 and the second driver 9821 have structures similar to those of the first gear 971 and the first driver 9721, respectively. Specifically, the second gear 981 has a generally circular sheet-like structure. A second gear portion 9811 capable of meshing with the third gear portion 922 is provided on the surface of the second gear 981 facing the third gear portion 922, and a second auxiliary teeth portion 9812 is provided on the surface of the second gear 981 facing the opposite side from the third gear portion 922. The second driver 982 has a generally L-shaped structure and includes a second driver 9821 and a second movable end 9822 that are connected to each other. A second guide groove 9822a is provided in the second movable end 9822. An end of the second driver 9821 remote from the second movable end 9822 has a second main teeth portion 9821a, which meshes unidirectionally with the second auxiliary teeth portion 9812. Specifically, the second main teeth portion 9821a includes a plurality of second main teeth 9821b arranged in the circumferential direction, and the second auxiliary teeth portion 9812 includes a plurality of second auxiliary teeth 9812a arranged in the circumferential direction, each of the second auxiliary teeth 9812a including a vertical third tooth surface 9812b and an inclined fourth tooth surface 9812c, the fourth tooth surface 9812c being located in the third rotational direction R3 of the third tooth surface 9812b. Therefore, when the second driving member 982 rotates in the third rotation direction R3, the second driving member 982 can drive the second gear 981 to rotate due to the meshing of the second main teeth 9821a with the second auxiliary teeth 9812. Specifically, the second main teeth 9721b come into contact with the third tooth surfaces 9812b, causing the second driving member 982 to push the second gear 981 to rotate accordingly. When the second driving member 982 rotates in a fourth rotation direction R4 opposite to the third rotation direction R3, the second driving member 982 cannot drive the second gear 981 to rotate due to the meshing of the second main teeth 9821a with the second auxiliary teeth 9812. Specifically, during rotation of the second drive member 982, each second main tooth 9821b slides along each fourth tooth surface 9812c so that the second drive member 982 cannot push the second gear 981 and rotate it accordingly.

[0092] In this embodiment, as shown in FIGS. 24 and 25 , the second driver 9821 is mounted in the hollow interior cavity 934 at the second mounting portion 933, and the second movable end 9822 is located in the hollow interior cavity 934 of the pull handle body 931. The second guide groove 9822a of the second movable end 9822 is at least partially exposed through the operation port 935 (as shown in FIG. 26 ). The second driver 982 is switchable between a second driver position and a second spaced position. When the second driver 982 is in the second driver position, the first operating member 930 is operable to drive the second gear 981 to rotate via the second driver 982. Specifically, when the second driving member 982 is in the second driving position, the second main teeth 9821a of the second driving member 982 penetrates the hollow internal cavity 934 (as shown in FIG. 31 ) and can mesh with the second auxiliary teeth 9812 of the second gear 981. When the second driving member 982 is in the second separated position, the second driving member 982 is separated from the second gear 981. In this case, even if the first operating member 930 is operable, the second gear 981 cannot be driven to rotate via the second driving member 982. Specifically, when the second driving member 982 is in the second separated position, the second main teeth 9821a retreats to the hollow internal cavity 934 so as to be separated from the second gear 981 (as shown in FIG. 30 ).

[0093] Furthermore, the second operating member 940 is a push button movably disposed in the operating port 935 of the first operating member 930. The second operating member 940 is movable between a first operating position and a second operating position. In this embodiment, the first operating position may be indicated by the word "up," and the second operating position may be indicated by the word "down." In other embodiments, the first operating position may be indicated by the word "down," and the second operating position may be indicated by the word "up," or the first operating position and the second operating position may be indicated by markings of different colors or patterns, for example. In this embodiment, when the second operating member 940 is in the first operating position, the first operating member 930 is operable to drive the rotation member 920 to rotate relative to the coupling member 160 along a first rotational direction R1 via the first drive assembly 970. When the second operating member 940 is in the second operating position, the first operating member 930 is operable, via the second drive assembly 980, to drive the rotating member 920 to rotate relative to the connecting member 160 along the second rotational direction R2.

[0094] Furthermore, as shown in Figures 23 and 28, when the second operating member 940 is in the first operating position, while the first operating member 930 rotates from the first rotation position to the second rotation position along the third rotation direction R3, i.e., when the first operating member 930 rotates upward, the first driving member 972 is driven to rotate along the third rotation direction R3, and the first driving member 972 drives the first gear 971 to rotate along the third rotation direction R3 by meshing between the first main tooth portion 9721a and the first auxiliary tooth portion 9712, and then drives the rotating member 920 to rotate along the first rotation direction R1 by meshing between the first gear portion 9711 and the third gear portion 922. While the first operating member 930 is reset to the first rotational position, i.e., when the first operating member 930 rotates downward, the first main teeth 9721a mesh with the first auxiliary teeth 9712 in one direction, and therefore the first driving member 972 cannot drive the first gear 971 to rotate along the fourth rotational direction R4. In this way, the first operating member 930 can be continuously rotated back and forth, and the first gear 971 drives the rotating member 920 to continuously rotate along the first rotational direction R1, thereby continuously increasing the height of the seat assembly 200.

[0095] Similarly, as shown in Figures 25 and 29, when the second operating member 940 is in the second operating position, while the first operating member 930 rotates from the first rotation position to the second rotation position along the third rotation direction R3, i.e., when the first operating member 930 rotates upward, the second driving member 982 is driven to rotate along the third rotation direction R3, and the second driving member 982 drives the second gear 981 to rotate along the third rotation direction R3 by meshing between the second main tooth portion 9821a and the second auxiliary tooth portion 9812, and then drives the rotating member 920 to rotate along the second rotation direction R2 by meshing between the second gear portion 9811 and the third gear portion 922. While the first operating member 930 is reset to the first rotational position, i.e., when the first operating member 930 rotates downward, the second main teeth 9821a mesh with the second auxiliary teeth 9821 in one direction, and therefore the second driving member 982 cannot drive the second gear 981 to rotate along the fourth rotational direction R4. In this way, the first operating member 930 can be continuously rotated back and forth, and the second gear 981 drives the third gear to continuously rotate along the second rotational direction R2, thereby continuously decreasing the height of the seat assembly 200.

[0096] 24 and 26 , one end of the guide post 960 is fixed to the second operating member 940, and the other end of the guide post 960 is inserted into the first guide groove 9722a and the second guide groove 9822a via the operating port 935. The extension direction of the operating port 935 is the same as the movement direction of the first driving member 972 and the second driving member 982. The operating port 935 has a first side wall 9351 and a second side wall 9352. When the second operating member 940 is in the first operating position, the guide post 960 abuts against the first side wall 9351. At the same time, the second operating member 940 drives the first driving member 972 to move from the first spaced position to the first driving position and drives the second driving member 982 to move from the second driving position to the second spaced position. When the second operating member 940 is in the second operating position, the guide post 960 abuts the second side wall 9352. At the same time, the second operating member 940 drives the second drive member 982 to move from the second spaced position to the second drive position and drives the first drive member 972 to move from the first drive position to the first spaced position.

[0097] 24 and 26, the third reset member 951 is adapted to bias the second operating member 940 to constantly move the second operating member 940 toward the first operating position or the second operating position. In this embodiment, the third reset member 951 is a torsion spring, one end of which is fixed to the guide post 960 and the other end of which is fixed to the first operating member 930, and the torsion spring is adapted to bias the second operating member 940 to move the second operating member 940 toward the first operating position.

[0098] In another embodiment (not shown), the second operating member 940 may further have a third operating position. The third operating position may be, for example, located midway between the first operating position and the second operating position. When the second operating member 940 is in the third operating position, the rotating member 920 and the connecting member 160 are fixed relative to each other. That is, when the second operating member 940 is in the third operating position, the first driving member 972 and the second driving member 982 are located in the first spaced position and the second spaced position, respectively. In this case, even if the first operating member 930 is operated, the first driving member 972 cannot drive the first gear 971 to rotate and thereby drive and rotate the rotating member 920, and the second driving member 982 cannot drive the second gear 981 to rotate and thereby drive and rotate the rotating member 920. In this manner, the second operating member 940 provides an additional safety locking mechanism for the locking mechanism 400, and can further prevent accidental raising or lowering of the seat assembly 400 caused by accidental contact of the second operating member 940. In this embodiment, the third reset member 951 is adapted to bias the second operating member 940 to move the second operating member 940 toward the third operating position.

[0099] In other embodiments not shown, the first main teeth portion 9721a of the first drive member 972 may mesh bidirectionally with the first auxiliary teeth portion 9712 of the first gear 971, and the first gear portion 9711 (which may alternatively function as the third main teeth portion) may mesh unidirectionally with the third gear portion 922 (which may alternatively function as the third auxiliary teeth portion). Similarly, the second main teeth portion 9821a of the second drive member 982 may mesh bidirectionally with the second auxiliary teeth portion 9812 of the second gear 981, and the second gear portion 9811 (which may alternatively function as the fourth main teeth portion) may mesh unidirectionally with the third gear portion 922 (which may alternatively function as the fourth auxiliary teeth portion). In this way, the first operating member 930 can be rotated continuously back and forth, so that the first gear 971 or the second gear 981 drives the third gear portion 922 (rotating member 920) to rotate continuously in the first rotation direction R1 or the second rotation direction R2, thereby continuously increasing or decreasing the height of the seat assembly 200.

[0100] In other embodiments not shown, the first drive member 972 and the second drive member 982 may alternatively be omitted, and the third gear portion 922 meshes with the first gear portion 9711 and the second gear portion 9811 in one direction, respectively. While the first operating member 930 rotates from the second rotational position to the first rotational position, the third gear portion 922 is fixed relative to the connecting member 160. While the first operating member 930 rotates from the first rotational position to the second rotational position, the third gear portion 922 can rotate relative to the connecting member 160 along a first rotational direction R1 or a second rotational direction R2. In this way, the first operating member 930 can be rotated continuously back and forth, so that the first gear 971 or the second gear 981 drives the third gear portion 922 (rotating member 920) to rotate continuously in the first rotation direction R1 or the second rotation direction R2, thereby continuously increasing or decreasing the height of the seat assembly 200.

[0101] In other embodiments not shown, the first drive member 972 and the second drive member 982 may alternatively have an integrally formed structure. That is, the first drive member 972 and the second drive member 982 are the same part and may be referred to as the drive member in this specification. The drive member has a generally U-shaped structure and includes a movable part and a first drive part and a second drive part connected to both ends of the movable part. A guide groove is provided approximately in the middle of the movable part, and one end of a guide post 960 is fixed to the second operating member 940, and the other end of the guide post 960 is inserted into the guide groove via an operating port 935. The structures of the first drive part and the second drive part are substantially the same as the structures of the first drive body 9721 and the second drive body 9821 in the above-mentioned embodiment. That is, the first drive part and the second drive part are also provided with a first main tooth portion 9721a and a second main tooth portion 9821a, respectively. In this manner, when the second operating member 940 is in the first operating position, the guide post 960 abuts against the first side wall 9351. At the same time, the second operating member 940 drives the first drive unit to move from the first spaced position to the first drive position, and drives the second drive unit to move from the second drive position to the second spaced position. When the second operating member 940 is in the second operating position, the guide post 960 abuts against the second side wall 9352. At the same time, the second operating member 940 drives the second drive unit to move from the second spaced position to the second drive position, and drives the first drive unit to move from the first drive position to the first spaced position.

[0102] The height adjustment process of the seat assembly 200 of the stroller is specifically as follows.

[0103] 23 and 28, when the height of the seat assembly 200 needs to be increased, the second operating member 940 can first be adjusted to the first operating position. In this case, the first drive member 972 moves from the first spaced position to the first drive position (in this case, the second drive member 982 moves from the second drive position to the second spaced position), and the first main teeth 9721a of the first drive member 972 abuts the first auxiliary teeth 9712 of the first gear 971. In this case, when the first operating member 930 is operated, the first driving member 972 can be driven to rotate about the sliding rod 321, and at the same time, the first gear 971 is driven to continuously rotate along the third rotation direction R3 due to cooperation between the first main tooth portion 9721 a and the first auxiliary tooth portion 9712, thereby driving the rotating member 920 to rotate along the first rotation direction R1 due to engagement between the first gear portion 9711 and the third gear portion 922. The rotating member 920 moves the sliding rod 321 in a direction approaching the connecting rod 150 by engaging its second screw thread 921 with the first screw thread 161 of the connecting member 160, thereby driving and lifting the seat assembly 200 via the support rod set 310.

[0104] 25 and 29, when the height of the seat assembly 200 needs to be lowered, the second operating member 940 can first be adjusted to the second operating position. In this case, the second drive member 982 moves from the second spaced position to the second drive position (in this case, the first drive member 972 moves from the first drive position to the first spaced position), and the second main teeth 9821a of the second drive member 982 abuts the second auxiliary teeth 9812 of the second gear 981. In this case, when the first operating member 930 is operated, the second driving member 982 can be driven to rotate about the sliding rod 321, and at the same time, the second gear 981 is driven to continuously rotate along the third rotation direction R3 due to cooperation between the second main teeth portion 9821 a and the second auxiliary teeth portion 9812, thereby driving the rotating member 920 to rotate along the second rotation direction R2 due to engagement between the second gear portion 9811 and the third gear portion 922. The rotating member 920 moves the sliding rod 321 in a direction away from the connecting rod 150 by engaging its second screw thread 921 with the first screw thread 161 of the connecting member 160, thereby driving and lowering the seat assembly 200 via the support rod set 310. In this embodiment, the unidirectional engagement between the first main tooth portion 9721a and the first auxiliary tooth portion 9712 and the unidirectional engagement between the second main tooth portion 9821a and the second auxiliary tooth portion 9812 allow the second operating member 940 to be repeatedly operated, thereby allowing the height of the seat assembly 200 to be continuously increased or decreased, thereby achieving stepless adjustment of the height of the seat assembly 200.

[0105] The stroller described above has at least the following technical effects.

[0106] The stroller seat assembly 200 is movably disposed on the stroller frame 100, and the height of the seat assembly 200 can be adjusted via a support rod set 310 movably connected between the stroller frame 100 and the seat assembly 200, which can meet children's requirements for observing the surrounding environment with different fields of view and can also be suitable for children of different heights to sit on. The support rod set 310 can be locked or unlocked via a locking mechanism 400, so that a user can unlock the support rod set 310 for adjustment when the height of the seat assembly 200 needs to be adjusted, or lock the support rod set 310 when the seat assembly 200 is adjusted to an appropriate height, thereby fixing the seat assembly 200 at the appropriate height.

[0107] The technical features in the above embodiments may be combined randomly. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, all combinations of technical features should be considered within the scope described herein unless they are mutually inconsistent.

[0108] The above embodiments merely describe some implementations of the present disclosure, and although the descriptions are specific and detailed, they cannot be understood as limitations on the patent scope of the present invention. It should be noted that those skilled in the art can make further modifications and improvements without departing from the concept of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the patent scope of the present disclosure should be subject to the scope of the accompanying claims. [Explanation of symbols]

[0109] 100: stroller frame, 110: armrest assembly, 111: front armrest, 112: side armrest, 120: front wheel frame, 130: rear wheel frame, 140: support rod, 141: lock recess, 150: connecting rod, 160: connecting member, 161: first screw thread, 200: seat assembly, 210: seat frame, 211: sliding groove, 220: seat post, 310: support rod set, 311: first lifting rod, 312: second lifting rod, 313: sliding pin, 320: sliding assembly, 321: sliding rod, 322: sliding seat, 322a: first sleeve portion, 322b: second sleeve portion, 322c: communicating hole, 323: fixing ring, 400: locking mechanism, 410: locking member, 411: lug, 420: operating member, 421: first receiving portion, 422: second receiving portion, 423: coupling portion, 424: slot, 425: first driving groove, 430: cover assembly, 431: first cover, 431a: second driving groove, 432: second cover, 440: first reset member, 450: lead pin, 500: Handle, 510: Handle body, 520: Handlebar, 600: Front wheel assembly, 700: Rear wheel assembly, 800: Accidental contact prevention mechanism, 810: Moving sleeve, 811: Operating portion, 812: Protrusion, 820: Second reset member, 910: fixed seat, 911: first fixed portion, 9111: mounting hole, 912: second fixed portion, 9121: engagement hook, 920: rotating member, 921: second screw thread, 922: third gear portion, 923: restricting protrusion, 930: first operating member, 931: pull handle body, 932: first mounting portion, 933: second mounting portion, 934: hollow internal cavity, 935: operating port, 9351: first side wall, 9352: second side wall, 940: second operating member, 951: third reset member, 952: fourth reset member, 960: guide post, 970: first drive assembly, 971: first gear, 9711: first gear portion, 9712: first Auxiliary teeth portion, 9712a: first auxiliary tooth, 9712b: first tooth surface, 9712c: second tooth surface, 972: first driving member, 9721: first driving body, 9721a: first main teeth portion, 9721b: first main tooth, 9722: first movable end, 9722a: first guide groove, 980: second driving assembly, 981: second Gear, 9811: second gear portion, 9812: second auxiliary tooth portion, 9812a: second auxiliary tooth, 9812b: third tooth surface, 9812c: fourth tooth surface, 982: second driving member, 9821: second driving body, 9821a: second main tooth portion, 9821b: second main tooth, 9822: second movable end, 9822a: second guide groove, M: pivot point, R1: first rotation direction, R2: second rotation direction, R3: third rotation direction, R4: fourth rotation direction.

Claims

1. Stroller frame and a seat assembly movably disposed on the stroller frame and configured to carry a child; a support rod set movably coupled to the stroller frame and the seat assembly, respectively, the support rod set configured to adjust the height of the seat assembly; a locking mechanism for selectively locking or unlocking the support rod set so that the seat assembly is fixed in a height position or the height of the seat assembly is adjustable; and A stroller equipped with:

2. 10. The stroller of claim 1, wherein at least two sets of support rods are provided, and the locking mechanism selectively locks or unlocks the at least two sets of support rods in synchronization.

3. 2. The stroller of claim 1, wherein the support rod set comprises a first lifting rod and a second lifting rod pivotally connected to each other, and wherein opposite ends of the first lifting rod are movably connected to the stroller frame and the seat assembly, respectively, and opposite ends of the second lifting rod are movably connected to the stroller frame and the seat assembly, respectively.

4. 4. The stroller of claim 3, wherein one end of the first lifting rod is pivotally connected to the stroller frame, the other end of the first lifting rod is slidably connected to the seat assembly, one end of the second lifting rod is movably connected to the stroller frame, and the other end of the second lifting rod is pivotally connected to the seat assembly.

5. 4. The stroller of claim 3, further comprising a sliding assembly, the sliding assembly being slidable relative to the stroller frame, and both ends of the second lifting rod being movably connected to the sliding assembly and the seat assembly, respectively.

6. 4. The stroller of claim 3, further comprising a sliding assembly, wherein the stroller frame comprises a horizontally disposed support rod, the sliding assembly being slidable relative to the support rod, one end of the second lifting rod being pivotally connected to the sliding assembly, and the other end of the second lifting rod being pivotally connected to the seat assembly.

7. 7. The stroller of claim 6, wherein the stroller frame includes a connecting rod, the connecting rod fixedly connected to the support rod, the sliding assembly spaced from the connecting rod, the sliding assembly movable toward or away from the connecting rod, and one end of the first lifting rod pivotally connected to the connecting rod.

8. 7. The stroller of claim 6, wherein the sliding assembly comprises a sliding rod and a sliding seat, the sliding seat being fixed to one end of the sliding rod, the sliding seat further cylindrically covering the support rod and being slidable along the support rod, and one end of the second lifting rod being pivotally connected to the sliding seat.

9. 4. The stroller of claim 3, wherein one end of the first lifting rod is pivotally connected to the stroller frame, the seat assembly is provided with a sliding groove, and the other end of the first lifting rod has a sliding pin fixed thereto, the sliding pin being inserted into the sliding groove and movable along the sliding groove.

10. 10. The stroller of claim 1, further comprising a sliding assembly, the sliding assembly being slidable relative to the stroller frame, the locking mechanism being disposed on the sliding assembly, the locking mechanism selectively locking the sliding assembly relative to the stroller frame or allowing the sliding assembly to slide relative to the stroller frame.

11. The locking mechanism is a locking member movably disposed within the slide assembly; an operating member disposed on the slide assembly and drivingly connected to the locking member; Equipped with 11. The stroller according to claim 10, wherein the stroller frame is provided with a plurality of locking recesses, and the operating member is operable to disengage the locking member from any of the locking recesses.

12. 12. The stroller of claim 11, wherein the stroller frame includes a horizontally disposed support rod, the plurality of locking recesses are arranged on the support rod and disposed along the length of the support rod, and when the operating member is operated, the locking member disengages from one of the locking recesses, allowing the sliding assembly to slide along the support rod.

13. 13. The stroller of claim 12, wherein the locking mechanism further comprises a lead pin, the lead pin being fixed to the locking member, the operating member having a first drive groove, the lead pin being inserted into the first drive groove and being movable along the first drive groove, and when the operating member is operated, the lead pin being movable along the first drive groove in a direction away from the support rod.

14. The stroller according to claim 13, wherein an extension direction of the first drive groove intersects with a movement direction of the locking member, and the extension direction of the first drive groove intersects with a direction in which the operating member is operated.

15. 14. The stroller of claim 13, wherein the locking mechanism further comprises a cover assembly, the cover assembly defining a storage space, at least a portion of the operating member being movably disposed within the storage space, and another portion of the operating member being extendable outward from the storage space for operation.

16. 16. The stroller of claim 15, wherein the cover assembly is provided with a second drive groove, the second drive groove extending along the movement direction of the locking member, and the lead pin is inserted into the second drive groove and is movable along the second drive groove.

17. 12. The stroller of claim 11, wherein the locking mechanism further comprises a first reset member, the first reset member biasing the locking member to move in a direction that engages with one of the locking recesses.

18. 2. The stroller of claim 1, further comprising an accidental contact prevention mechanism, the accidental contact prevention mechanism having a locked state and an unlocked state, the locking mechanism continuing to lock the support rod set when the accidental contact prevention mechanism is in the locked state, and the locking mechanism being operable to unlock the support rod set when the accidental contact prevention mechanism is in the unlocked state.

19. 12. The stroller of claim 11, further comprising an accidental contact prevention mechanism, the accidental contact prevention mechanism cylindrically covering the sliding assembly and movable along the sliding assembly, the accidental contact prevention mechanism having a locked state and an unlocked state, and when the accidental contact prevention mechanism is in the locked state, the operating member cannot be operated to disengage the locking member from any of the locking recesses, and when the accidental contact prevention mechanism is in the unlocked state, the operating member can be operated to disengage the locking member from any of the locking recesses.

20. The accidental contact prevention mechanism includes: An operation unit; a protrusion that can come into contact with the operating member; Equipped with A stroller as described in claim 18 or 19, wherein when the accidental contact prevention mechanism is in the locked state, the protrusion can abut against the operating member, so that the operating member cannot be operated, and when the accidental contact prevention mechanism is in the unlocked state, the protrusion is separated from the operating member, so that the operating member can be operated, and the operating member can be operated to switch the accidental contact prevention mechanism from the locked state to the unlocked state.

21. 21. The stroller according to claim 20, wherein the accidental contact prevention mechanism further comprises a second reset member, the second reset member biasing the protrusion to abut against the operating member.

22. 3. The stroller of claim 2, wherein two sets of support rods are provided, one on each side of the seat assembly.

23. 23. The stroller of claim 22, further comprising a sliding assembly, wherein the stroller frame comprises two horizontally disposed support rods, the sliding assembly being slidable relative to the support rods.

24. 24. The stroller of claim 23, wherein each of the support rod sets comprises a first lifting rod and a second lifting rod pivotally connected to each other, each of the two first lifting rods having opposite ends movably connected to the stroller frame and the seat assembly, respectively, each of the sliding assembly having opposite ends pivotally connected to one end of two second lifting rods, each of the opposite ends of the two second lifting rods being movably connected to the seat assembly.

25. The locking mechanism is two locking members respectively movably disposed within the sliding assembly, the two locking members moving in opposite directions; an operating member disposed on the slide assembly and drivably connected to each of the two locking members; Equipped with 25. The stroller of claim 24, wherein each of the two support rods is provided with a plurality of locking recesses, and the operating member is operable to allow the two locking members to be disengaged from any of the locking recesses on the two support rods.

26. 26. The stroller of claim 25, wherein the locking mechanism further comprises a first reset member, both ends of which abut against the two locking members, respectively, and the first reset member biases the two locking members toward the two support rods, respectively.

27. 4. The stroller of claim 3, wherein an intermediate portion of the first lifting rod is pivotally connected to an intermediate portion of the second lifting rod.

28. The locking mechanism is a first operating member; a first threaded coupling member; a rotating member provided with a second thread that threadably couples with the first thread; a drive assembly disposed between the first operating member and the rotating member; Equipped with 11. The stroller of claim 10, wherein the first operating member is operable to drive the rotating member to rotate relative to the connecting member via the drive assembly.

29. 29. The stroller of claim 28, wherein the stroller frame includes a connecting rod, the sliding assembly is spaced apart from the connecting rod, one of the connecting member and the rotating member is disposed on the connecting rod, and the other of the connecting member and the rotating member is disposed on the sliding assembly, and when the rotating member rotates relative to the connecting member, the sliding assembly moves toward or away from the connecting rod.

30. 30. The stroller of claim 29, wherein the support rod set comprises a first lifting rod and a second lifting rod pivotally connected to each other, the ends of the first lifting rod being movably connected to the connecting rod and the seat assembly, respectively, and the ends of the second lifting rod being movably connected to the sliding assembly and the seat assembly, respectively.

31. 30. The stroller of claim 29, wherein one end of the connecting member is fixed to the connecting rod, the other end of the connecting member is provided with the first screw thread, one end of the rotating member is provided with the second screw thread, and the other end of the rotating member is rotatably connected to the sliding assembly.

32. The locking mechanism is a second operating member having a first operating position and a second operating position; two drive assemblies are provided, the first drive assembly and the second drive assembly, respectively; 32. The stroller of claim 31, wherein when the second operating member is in the first operating position, the first operating member is operable via the first drive assembly to drive the rotating member to rotate relative to the connecting member along a first rotational direction, and when the second operating member is in the second operating position, the first operating member is operable via the second drive assembly to drive the rotating member to rotate relative to the connecting member along a second rotational direction, the first rotational direction being opposite to the second rotational direction.

33. 33. The stroller of claim 32, wherein when the rotating member rotates relative to the connecting member along the first rotational direction, the distance between the connecting rod and the sliding assembly decreases and the height of the seat assembly increases, and when the rotating member rotates relative to the connecting member along the second rotational direction, the distance between the connecting rod and the sliding assembly increases and the height of the seat assembly decreases.

34. a third gear portion is provided at the other end of the rotating member remote from the second screw thread; The first drive assembly includes: a first drive member that is driven into engagement with the second operating member; a first gear having a first gear portion meshable with the third gear portion; Equipped with The second drive assembly includes: a second drive member that is driven into engagement with the second operating member; a second gear having a second gear portion meshable with the third gear portion; Equipped with 33. The stroller of claim 32, wherein when the second operating member is in the first operating position, the first operating member is operable via the first drive member to drive the first gear to rotate the third gear portion along the first rotational direction, and when the second operating member is in the second operating position, the second operating member is operable via the second drive member to drive the second gear to rotate the third gear portion along the second rotational direction.

35. 33. The stroller of claim 32, wherein the second operating member further has a third operating position, and when the second operating member is in the third operating position, the first operating member is operated and the rotating member and the connecting member are fixed relative to each other.

36. the first gear portion meshes with the third gear portion; the first drive member is switchable between a first drive position and a first spaced position; when the first drive member is in the first drive position, the first operating member is operable to drive and rotate the first gear via the first drive member; and when the first drive member is in the first spaced position, the first drive member is spaced from the first gear; 35. The stroller of claim 34, wherein the second gear portion meshes with the third gear portion, the second drive member is switchable between a second drive position and a second spaced position, and when the second drive member is in the second drive position, the first operating member is operable to drive and rotate the second gear via the second drive member, and when the second drive member is in the second spaced position, the second drive member is spaced from the second gear.

37. 37. The stroller of claim 36, wherein when the second operating member moves to the first operating position, the second operating member drives the first drive member to move from the first separated position to the first drive position, the second operating member drives the second drive member to move from the second drive position to the second separated position, and when the second operating member moves to the second operating position, the second operating member drives the first drive member to move from the first drive position to the first separated position, and the second operating member drives the second drive member to move from the second separated position to the second drive position.

38. 38. The stroller of claim 37, wherein the locking mechanism further comprises a third reset member, the third reset member adapted to bias the second operating member to move the second operating member toward the first operating position or the second operating position.

39. 35. The stroller of claim 34, wherein the third gear portion meshes with the first gear portion and the second gear portion in one direction, respectively, or the first gear meshes with the first drive member in one direction and the second gear meshes with the second drive member in one direction.

40. the first operating member is rotatably disposed on the slide assembly, the first drive member and the second drive member are both disposed outside the slide assembly and rotate coaxially with the first operating member, the first operating member is switchable between a first rotation position and a second rotation position, when the second operating member is in the first operating position, the first drive member drives the first gear to rotate synchronously while the first operating member rotates from the first rotation position to the second rotation position, 40. The stroller of claim 39, wherein the first gear is fixed relative to the slide assembly while the first operating member rotates from the second rotation position to the first rotation position, and when the second operating member is in the second operating position, the second drive member drives the second gear to rotate synchronously while the first operating member rotates from the first rotation position to the second rotation position, and the second gear is fixed relative to the slide assembly while the first operating member rotates from the second rotation position to the first rotation position.

41. 41. The stroller of claim 40, wherein the surface of the first drive member facing the first gear has first main teeth, the surface of the first gear facing the first drive member has first auxiliary teeth, and the first main teeth mesh with the first auxiliary teeth in one direction, and the surface of the second drive member facing the second gear has second main teeth, and the surface of the second gear facing the second drive member has second auxiliary teeth, and the second main teeth mesh with the second auxiliary teeth in one direction.

42. 41. The stroller of claim 40, wherein the locking mechanism further comprises a fourth reset member, the fourth reset member adapted to bias the first operating member to move the first operating member from the second rotational position to the first rotational position.

43. The first drive member and the second drive member are both located within a hollow internal cavity of the first operating member, the first operating member having an operating port connected to the hollow internal cavity, the first drive member having a first movable end, the first movable end having a first guide groove, the second drive member having a second movable end, the second movable end having a second guide groove, the locking mechanism further comprising a guide post, one end of the guide post being fixed to the second operating member, 38. The stroller of claim 37, wherein the other end of the guide post is inserted into the first guide groove and the second guide groove via the operating port, the extension direction of the operating port is the same as the movement direction of the first driving member and the second driving member, the operating port has a first side wall and a second side wall, and when the second operating member is in the first operating position, the guide post abuts against the first side wall, and when the second operating member is in the second operating position, the guide post abuts against the second side wall.

44. 44. The stroller of claim 43, wherein the locking mechanism further comprises a third reset member, the third reset member being a torsion spring, one end of the torsion spring being fixed to the guide post and the other end of the torsion spring being fixed to the first operating member, and the third reset member being adapted to bias the second operating member to move the second operating member toward the first operating position or the second operating position.

45. 35. The stroller of claim 34, wherein the first drive member and the second drive member have an integrally formed structure.

46. 41. The stroller of claim 40, wherein the surface of the first gear facing the third gear has third main teeth, the surface of the third gear facing the first gear has third auxiliary teeth, and the third main teeth mesh with the third auxiliary teeth in one direction, the surface of the second gear facing the third gear has fourth main teeth, and the surface of the third gear facing the second gear has fourth auxiliary teeth, and the fourth main teeth mesh with the fourth auxiliary teeth in one direction.

47. 32. The stroller of claim 31, wherein the locking mechanism further comprises a fixed seat, the fixed seat being fixed to the sliding assembly, the rotating member being rotatably disposed on the fixed seat, and the drive assembly and the first operating member being movably disposed on the fixed seat.

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