Strollers

Abstract

A child stroller includes a bottom frame and an upper frame structure formed above the bottom frame, wherein the bottom frame includes a bottom frame, a rear wheel support rod connected to the bottom frame so as to be rotatable only around a bottom axis extending forward and backward, and a front wheel support rod arranged on the rear wheel support rod so as to be slidable only forward and backward linearly, and a sliding synchronization mechanism is arranged between the rear part of the front wheel support rod and the bottom frame to drive relative rotation when the two are displaced forward and backward, and the front wheel assembly is arranged at the front part of the front wheel support rod, and the rear wheel assembly is arranged at the rear part of the rear wheel support rod. The front wheel support rod and the rear wheel support rod are shortened front and back, that is, the front wheel support rod, the rear wheel support rod and the bottom frame are shortened front and back, and under the cooperation of the sliding synchronization mechanism, the front wheel support rod and the rear wheel support rod are synchronously rotated relative to the bottom frame, so that the original standing front wheel assembly and rear wheel assembly are not only shortened in front and back distance, but also the front wheel assembly and the rear wheel assembly on the left and right sides are respectively rotated and folded toward each other, and the folded volume of the stroller frame is more compact and flat.

Description

Technical Field

[0001] The invention relates to a baby stroller. Background Art

[0002] A child stroller in the prior art generally comprises a stroller frame having an unfolded position and a folded position, a seat mechanism disposed on the stroller frame, a vehicle locking mechanism for locking the stroller frame in the unfolded position, a front wheel assembly, a rear wheel assembly, etc. There are many types of stroller frames, but most of them only have the stroller frame folded, and the front wheel assembly and the rear wheel assembly are not folded, so the volume after folding is also relatively large. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a baby stroller.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a child stroller, comprising a stroller frame with an unfolded position and a folded position, a seat device, a front wheel assembly, a rear wheel assembly, and a frame locking mechanism for locking the stroller frame in the unfolded position, wherein the stroller frame comprises side brackets located at left and right side portions,

[0005] The side bracket on each side comprises:

[0006] An underframe, and an upper frame structure formed above the underframe;

[0007] The chassis comprises:

[0008] A front wheel support rod, wherein the front wheel assembly is arranged at the front part of the front wheel support rod;

[0009] A rear wheel support rod, wherein the rear wheel assembly is arranged at the rear of the rear wheel support rod, and the front wheel support rod and the rear wheel support rod can only be arranged to slide linearly forward and backward;

[0010] The bottom frame, one of the rear wheel support rod and the front wheel support rod, is connected to the bottom frame so as to be rotatable only about a bottom axis extending forward and backward.

[0011] The other of the rear wheel support rod and the front wheel support rod is arranged with the base frame to be both linearly slidable and rotatable, and a sliding synchronization mechanism is arranged between the base frame to drive relative rotation when the two are displaced forward and backward.

[0012] That is, one of the rear wheel support rod and the front wheel support rod can only rotate relative to the base frame, and the other of the two can slide and rotate relative to the base frame. When the rear wheel support rod and the front wheel support rod slide relative to each other, the two can rotate synchronously relative to the base frame.

[0013] In certain embodiments, the upper frame structure on each side includes:

[0014] Front strut;

[0015] A rear support rod, the upper portion of which is pivotally connected to the upper portion of the front support rod around an upper axis extending leftward and rightward;

[0016] A connecting piece, the lower part of which is rotatably connected to the other of the rear wheel support rod and the front wheel support rod only around the two bottom axes extending front and back, the two bottom axes and the one bottom axis extend in the same straight line direction, the connecting piece and the bottom base frame are arranged one after the other, the former of the connecting piece and the bottom base frame is pivotally connected to the lower part of the front support rod around the upper three axes extending left and right, and the latter of the connecting piece and the bottom base frame is pivotally connected to the lower part of the rear support rod around the upper two axes extending left and right.

[0017] In certain embodiments, the upper frame structure on each side further comprises:

[0018] A front support slide, the front support slide is slidably arranged on the front support rod along the rod length direction of the front support rod;

[0019] A driving connecting rod is connected to an upper four-axis pivot extending left and right around the front support slide, and the driving connecting rod is connected to an upper five-axis pivot extending left and right around the rear support rod.

[0020] In certain embodiments, the upper frame structure on each side further comprises:

[0021] A push rod assembly is slidably arranged on the front support rod along the length direction of the rod of the front support rod. A sliding linkage mechanism is arranged between the lower part of the push rod assembly and the front support slide. When the push rod assembly slides upward or downward relative to the front support rod, the sliding linkage mechanism causes the front support slide to also slide upward or downward.

[0022] In certain embodiments, the frame locking mechanism includes a vehicle locking mechanism disposed between the lower portion of the push rod assembly and the front strut.

[0023] In certain embodiments, the push rod assembly includes a lower push rod located at the bottom, and an upper push rod located at the top and telescopically arranged up and down with the lower push rod, and the frame locking mechanism includes a push rod locking mechanism arranged between the upper push rod and the lower push rod.

[0024] In some embodiments, the rear wheel support rod is rotatably connected to the base frame around the bottom axis, the front wheel support rod and the base frame can both slide linearly forward and backward and can rotate, and the rear wheel support rod, the front wheel support rod and the base frame are mutually nested.

[0025] In some embodiments, the front wheel support rod can be inserted into the rear wheel support rod in a linear sliding manner forward and backward, and the base frame can be rotatably mounted on the rear wheel support rod around the bottom axis. The front wheel support rod has a protruding locating pin, and the rear wheel support rod has a straight groove extending forward and backward, and the locating pin is inserted in the straight groove. The sliding synchronization mechanism includes a guide groove and the locating pin provided on the base frame, and the locating pin is inserted in the guide groove. The guide groove at least includes a spiral groove section extending helically. During the sliding of the locating pin in the spiral groove section, the front wheel support rod and the rear wheel support rod rotate synchronously relative to the base frame.

[0026] In some embodiments, the chassis on the left and right sides are symmetrically arranged, and the distance between the front wheel assembly and the rear wheel assembly when the cart frame is in the expanded position is greater than the distance between the front wheel assembly and the rear wheel assembly when the cart frame is in the folded position; and when the cart frame is in the expanded position, the front wheel assembly and the rear wheel assembly respectively extend downward to stand, and when the cart frame is in the folded position, the front wheel assemblies on the left and right sides and the rear wheel assemblies on the left and right sides respectively rotate towards each other and fold towards each other.

[0027] In some embodiments, the cart frame further includes a plurality of cross bars, and the plurality of cross bars are fixedly connected between the left and right side brackets to form a rigid cart frame.

[0028] The scope of the present invention is not limited to the technical solutions formed by a specific combination of the above technical features, but also includes other technical solutions formed by any combination of the above technical features or their equivalent features. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in this application.

[0029] Due to the application of the above technical scheme, the present invention has the following advantages compared with the prior art: the front wheel support rod and the rear wheel support rod of the bottom frame can only slide relative to each other, one of the two can only rotate relative to the bottom frame, and the other can synchronously realize rotation and sliding through the sliding synchronization mechanism. When the stroller frame is folded, the front wheel support rod and the rear wheel support rod are shortened front and back, that is, the front and rear distances between the front wheel support rod, the rear wheel support rod and the bottom frame are also shortened. Under the cooperation of the sliding synchronization mechanism, the front wheel support rod and the rear wheel support rod are synchronously rotated relative to the bottom frame, that is, after the stroller frame is folded, the front wheel assembly and the rear wheel assembly that were originally standing not only have a shortened front and rear distance, but also the front wheel assemblies and the rear wheel assemblies on the left and right sides are rotated and folded toward each other, so that the volume of the child stroller is more compact and flatter after being folded. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Attached Figure 1 A three-dimensional diagram of the child stroller in the unfolded position according to the first embodiment Figure 1 ;

[0031] Attached Figure 2 A three-dimensional diagram of the child stroller in the unfolded position according to the first embodiment Figure 2 ;

[0032] Attached Figure 3 This is a top view schematic diagram of the child stroller in the first embodiment in the unfolded position;

[0033] Attached Figure 4 It is a front view schematic diagram of the child stroller in the first embodiment in the unfolded position;

[0034] Attached Figure 5 The first embodiment of the child stroller is in the process of folding Figure 1 ;

[0035] Attached Figure 6 The first embodiment of the child stroller is in the process of folding Figure 2 ;

[0036] Attached Figure 7 This is a three-dimensional schematic diagram of the child stroller in the folded position according to the first embodiment;

[0037] Attached Figure 8 This is a schematic diagram of the chassis breakdown;

[0038] Attached Fig. 9 It is a three-dimensional schematic diagram of the bottom frame after assembly (the bottom frame shell is omitted);

[0039] Attached Fig.10 A three-dimensional schematic diagram of the chassis after assembly;

[0040] Wherein: P1, side bracket; P2, crossbar; W1, front wheel assembly; W2, rear wheel assembly;

[0041] 1. chassis; 11. bottom frame; 111. guide groove; 12. front wheel support rod; 121. positioning pin; 13. rear wheel support rod; 131. straight groove; X11. bottom first axis; X12. bottom second axis;

[0042] 2. Upper frame structure; 21. Front support rod; 22. Rear support rod; 23. Connecting piece; 24. Front support slide; 25. Driving connecting rod; 26. Push rod assembly; 261. Lower push rod;

[0043] 262, upper push rod; X21, upper axis; X22, upper axis; X23, upper axis; X24, upper axis; X25, upper axis. DETAILED DESCRIPTION

[0044] Embodiment 1, as attached Figure 1-10 shown.

[0045] A child stroller comprises a stroller frame having an unfolded position and a folded position, a seat device, a front wheel assembly W1, a rear wheel assembly W2, and a frame locking mechanism for locking the stroller frame in the unfolded position. Figure 1-7 As shown, the cart frame includes side brackets P1 located on the left and right sides, and the cart frame also includes a plurality of cross bars P2, which are fixedly connected between the left and right side brackets P1 to form a rigid cart frame.

[0046] As attached Figure 4 As shown, the side support P1 on each side includes: a bottom frame 1 and an upper frame structure 2 formed above the bottom frame 1 .

[0047] As attached Figure 1 , 2 , 8-10, the chassis 1 includes:

[0048] Bottom base frame 11;

[0049] The rear wheel support rod 13 is connected to the bottom frame 11 so as to be rotatable only about a bottom axis X11 extending forward and backward, and the rear wheel assembly W2 is disposed at the rear of the rear wheel support rod 13;

[0050] The front wheel support rod 12 and the rear wheel support rod 13 can only be set to slide linearly forward and backward. The front wheel support rod 12 and the bottom base frame 11 can both slide linearly along the bottom axis X11 and rotate around the bottom axis X11. A sliding synchronization mechanism is set between the rear part of the front wheel support rod 12 and the bottom base frame 11 to drive relative rotation when the two are displaced forward and backward. The front wheel assembly W1 is set at the front part of the front wheel support rod 12.

[0051] The bottom frames 1 on the left and right sides are symmetrically arranged, and the distance between the front wheel assembly W1 and the rear wheel assembly W2 when the cart frame is in the unfolded position is greater than the distance between the front wheel assembly W1 and the rear wheel assembly W2 when the cart frame is in the folded position; and when the cart frame is in the unfolded position, the front wheel assembly W1 and the rear wheel assembly W2 respectively extend downward and stand, and when the cart frame is in the folded position, the front wheel assemblies W1 on the left and right sides and the rear wheel assemblies W2 on the left and right sides respectively rotate towards each other and fold towards each other.

[0052] As attached Figure 8-10 As shown, in detail, the chassis 1 is realized, the rear wheel support rod 13, the front wheel support rod 12, and the bottom base frame 11 are mutually sleeved, and the center line of the front wheel support rod 12 extending forward and backward coincides with the bottom first axis X11. The front wheel support rod 12 can be inserted into the rear wheel support rod 13 in a linear sliding manner forward and backward, and the bottom base frame 11 can be sleeved on the rear wheel support rod 13 in a rotatable manner around the bottom first axis X11. The front wheel support rod 12 has a protruding positioning pin 121, and the rear wheel support rod 13 has a straight groove 131 extending forward and backward, and the positioning pin 121 is inserted into the straight groove 131.

[0053] As attached Figure 8 As shown, the base frame 11 includes a base frame body and a base frame housing fixedly sleeved outside the base frame body, and the two form an integral body. The sliding synchronization mechanism includes a guide groove 111 provided on the base frame body of the base frame 11, and a positioning pin 121 on the front wheel support rod 12, and the positioning pin 121 is inserted into the guide groove 111. The guide groove 111 includes a spiral groove section extending spirally and a straight groove section extending forward and backward. When the positioning pin 121 is in the straight groove section, the front wheel support rod 12 can only slide forward and backward relative to the base frame 11 and the rear wheel support rod 13. When the positioning pin 121 slides in the spiral groove section, the front wheel support rod 12 can drive the rear wheel support rod 13 to rotate synchronously relative to the base frame 11. In this embodiment, the spiral groove section is rotated 90° by processing, that is, the front wheel support rod 12 and the rear wheel support rod 13 can rotate 90° relative to the base frame 11. When folded, the front wheel assemblies and the rear wheel assemblies on the left and right sides can be rotated toward each other and folded to approximately the same plane. After folding, the baby stroller is more compact and flatter.

[0054] Or, the chassis 1 can also be realized like this, without diagram, the front wheel support rod can be slidably sleeved on the rear wheel support rod in a straight line forward and backward manner. The position of the locating pin and the guide groove is interchanged, that is, the locating pin is arranged on the bottom frame 11, and the guide groove is arranged on the front wheel support rod.

[0055] The upper frame structure 2 can theoretically be any structure that can cause the front wheel support rod 12 to move telescopically and slide relative to the rear wheel support rod 13. Figure 1-7 As shown. The upper frame structure 2 on each side includes:

[0056] Front support rod 21;

[0057] A rear support rod 22, the upper portion of the rear support rod 22 is pivotally connected to the upper portion of the front support rod 21 around an upper axis X21 extending left and right, and the lower portion of the rear support rod 22 is pivotally connected to the bottom frame 11 around an upper second axis X22 extending left and right;

[0058] In this embodiment, the connecting member 23, the lower part of the connecting member 23 can only be rotatably mounted on the front wheel support rod 12 around the bottom two axes X12 extending forward and backward, the bottom two axes X12 coincide with the center line extending forward and backward of the front wheel support rod 12, and the bottom two axes X12 and the bottom one axis X11 extend in the same straight line direction. The upper part of the connecting member 23 is pivotally connected to the lower part of the front support rod 21 around the upper three axes X23 extending left and right. Because the connecting member 23 and the front wheel support rod 12 can neither rotate nor slide in the front and back, upper and lower planes, they are regarded as one body, forming a front and rear telescopic structure with the bottom frame 11, and forming a large triangular mechanism that can be deformed with the front support rod 21 and the rear support rod 22. The connection of the above connecting member 23 is based on the premise that the front wheel support rod 12 is set to slide and rotate forward and backward relative to the bottom frame 11, and the rear wheel support rod 13 is installed and set to rotate relative to the bottom frame 11. Not shown in the figure, if the structure of the chassis is that the front wheel support rod 12 can only rotate relative to the bottom frame 11, and the rear wheel support rod 13 can both slide back and forth and rotate relative to the bottom frame 11, the lower part of the connecting member 23 must be rotatably connected to the rear wheel support rod 13 around the bottom two axes X12, the bottom frame 11 is located in the front, and the connecting member 23 is located in the rear, the lower part of the front support rod 21 is pivotally connected to the bottom frame 11 around the upper three axes X23 extending left and right, and the lower part of the rear support rod 22 is pivotally connected to the connecting member 23 around the upper two axes X22 extending left and right.

[0059] When the front wheel support rod 12 is retracted into the rear wheel support rod 13, that is, it retracts and slides relative to the bottom frame 11, the front wheel support rod 12 is caused to rotate relative to the bottom frame 11 under the cooperation of the sliding synchronization mechanism, thereby driving the rear wheel support rod 13 to rotate relative to the bottom frame 11. That is, after the stroller frame is folded, the front wheel assembly W1 and the rear wheel assembly W2 that were originally standing on the same bottom frame are brought closer together, and the distance between them is shortened. In addition, the front wheel assemblies W1 on the left and right sides and the rear wheel assemblies W2 on the left and right sides are respectively rotated towards each other and folded to approximately the same plane. After the stroller is folded, the volume is more compact and flatter.

[0060] In order to make the above-mentioned large triangle mechanism run more smoothly and ensure that the front wheel support rod 12 is retracted relative to the bottom frame 11 when the cart frame is folded, the upper frame structure 2 on each side also includes:

[0061] A front support slide 24, the front support slide 24 is slidably disposed on the front support rod 21 along the rod length direction of the front support rod 21;

[0062] A driving connecting rod 25, the driving connecting rod 25 is pivotally connected to the front support slide 24 around an upper four-axis X24 extending left and right, and the driving connecting rod 25 is pivotally connected to the rear support rod 22 around an upper five-axis X25 extending left and right;

[0063] The push rod assembly 26 is slidably arranged on the front support rod 21 along the rod length direction of the front support rod 21. A sliding linkage mechanism is arranged between the lower part of the push rod assembly 26 and the front support slide 24. In this embodiment, the sliding linkage mechanism is the cooperation of the slide groove and the pin. When the push rod assembly 26 slides upward relative to the front support rod 21, the pin hooks the upper end surface of the slide groove, so that the front support slide 24 also slides upward. When the push rod assembly 26 slides downward relative to the front support rod 21, the pin hooks the lower end surface of the slide groove, so that the front support slide 24 also slides downward. Therefore, the sliding linkage mechanism can be realized by the cooperation of the pin at the lower part of the push rod assembly 26 and the two stoppers arranged on the front support slide 24.

[0064] The front support slide 24 and the front support rod 21 form a telescopic rod, and together with the rear support rod 22 and the driving connecting rod 25, form a small triangular mechanism that can be deformed. The small triangular mechanism plays the role of assisting the rigidity reinforcement and folding of the above-mentioned large triangular mechanism. When folding, the push rod assembly 26 is slidably arranged on the front support rod 21, thereby starting the deformation of the small triangular mechanism, thereby driving the deformation of the large triangular mechanism, and quickly unfolding and folding.

[0065] In order to make the volume smaller after folding, the push rod assembly 26 is a telescopic rod, including a lower push rod 261 located at the bottom and an upper push rod 262 located at the top and telescopically arranged with the lower push rod 261 up and down.

[0066] In this embodiment, the frame locking mechanism includes a vehicle locking mechanism disposed between the lower portion of the push rod assembly 26 and the front support rod 21, and a push rod locking mechanism disposed between the upper push rod 262 and the lower push rod 261. The vehicle locking mechanism and the push rod locking mechanism are both commonly used and necessary mechanisms in the field of push carts, and their specific structures are not described in detail.

[0067] The axis line of the bottom axis X11, the axis line of the bottom axis X12, and the center line of the front wheel support rod 12 are tilted upward and backward from the front, forming an angle a with the horizontal plane, and the angle a is 3°. The bottom frame 1 is tilted 3°, so that the center of gravity of the cart frame is more stable when it is unfolded, and it is convenient for the front wheel support rod 12 to retract relative to the bottom frame 11 when folded.

[0068] Embodiment 2, not shown in the figure, is different from Embodiment 1 in that the upper frame structure is different, and the upper frame structure includes a front support rod, a push rod assembly whose lower end is connected to the upper end of the front support rod around an axis extending left and right, a rear support rod whose upper end is connected to the push rod assembly around an axis extending left and right, and a connecting piece that is directly rotatably sleeved on the front of the front wheel support rod along an axis extending front and back, the front support rod is connected to the connecting piece around an axis extending left and right, and the lower end of the rear support rod is connected to the bottom frame around an axis extending left and right. When folding, the push rod assembly flips forward and drags the rear support rod forward, so that the front wheel assembly and the rear wheel assembly of the same bottom frame can be brought together front and back, and the front wheel assembly and the rear wheel assembly on the left and right sides are respectively rotated toward each other and folded to approximately the same plane, so that the baby stroller is more compact and flatter after being folded.

[0069] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A child stroller, comprising a stroller frame having an unfolded position and a folded position, a seat device, a front wheel assembly (W1), a rear wheel assembly (W2), and a frame locking mechanism for locking the stroller frame in the unfolded position, wherein the stroller frame comprises side brackets (P1) located at left and right side portions, Features: The side support (P1) on each side comprises: An underframe (1), and an upper frame structure (2) formed above the underframe (1); The base frame (1) comprises: A front wheel support rod (12), wherein the front wheel assembly (W1) is arranged at the front portion of the front wheel support rod (12); A rear wheel support rod (13), the rear wheel assembly (W2) being arranged at the rear portion of the rear wheel support rod (13), and the front wheel support rod (12) and the rear wheel support rod (13) being arranged so as to be capable of linear sliding forward and backward only; The bottom frame (11), one of the rear wheel support rod (13) and the front wheel support rod (12) is connected to the bottom frame (11) so as to be rotatable only about a bottom axis (X11) extending forward and backward. The other of the rear wheel support rod (13) and the front wheel support rod (12) is arranged with the base frame (11) to be both linearly slidable and rotatable, and a sliding synchronization mechanism is arranged between the base frame (11) to drive relative rotation when the two are displaced forward and backward. The rear wheel support rod (13) is rotatably connected to the bottom frame (11) around the bottom axis (X11); the front wheel support rod (12) and the bottom frame (11) are arranged to be both linearly slidable forward and backward and rotatable; the rear wheel support rod (13), the front wheel support rod (12) and the bottom frame (11) are mutually sleeved. The front wheel support rod (12) can be inserted into the rear wheel support rod (13) in a linearly sliding manner forward and backward; the bottom frame (11) can be rotatably mounted on the rear wheel support rod (13) around the bottom axis (X11); the front wheel support rod (12) has a protruding positioning pin (121); the rear wheel support rod (13) has a straight groove (131) extending forward and backward; the positioning pin (121) is inserted into the straight groove (131); the sliding synchronization mechanism comprises a guide groove (111) provided on the bottom frame (11) and the positioning pin (121); the positioning pin (121) is inserted into the guide groove (111); The guide groove (111) comprises a spiral groove section extending in a spiral direction and a straight groove section extending forward and backward. When the positioning pin (121) is in the straight groove section, the front wheel support rod (12) can only slide forward and backward relative to the base frame (11) and the rear wheel support rod (13). When the positioning pin (121) slides in the spiral groove section, the front wheel support rod (12) can drive the rear wheel support rod (13) to rotate synchronously relative to the base frame (11).

2. The baby stroller according to claim 1, characterized in that: The upper frame structure (2) on each side comprises: Front support rod (21); A rear support rod (22), the upper portion of the rear support rod (22) being pivotally connected to the upper portion of the front support rod (21) around an upper axis (X21) extending leftward and rightward; A connecting member (23), the lower part of which is rotatably connected to the other of the rear wheel support rod (13) and the front wheel support rod (12) only around two bottom axes (X12) extending forward and backward, the two bottom axes (X12) and the one bottom axis (X11) extending in the same straight line direction, the connecting member (23) and the bottom frame (11) are arranged one in front of the other, the former of the connecting member (23) and the bottom frame (11) is pivotally connected to the lower part of the front support rod (21) around three upper axes (X23) extending left and right, and the latter of the connecting member (23) and the bottom frame (11) is pivotally connected to the lower part of the rear support rod (22) around two upper axes (X22) extending left and right.

3. The stroller according to claim 2, characterized in that: The upper frame structure (2) on each side also includes: A front support slide (24), the front support slide (24) being slidably disposed on the front support rod (21) along a rod length direction of the front support rod (21); A driving connecting rod (25) is pivotally connected to the front support slide (24) around an upper fourth axis (X24) extending leftward and rightward, and the driving connecting rod (25) is pivotally connected to the rear support rod (22) around an upper fifth axis (X25) extending leftward and rightward.

4. The stroller according to claim 3, characterized in that: The upper frame structure (2) on each side also includes: A push rod assembly (26), wherein the push rod assembly (26) is slidably arranged on the front support rod (21) along the length direction of the rod of the front support rod (21), and a sliding linkage mechanism is arranged between the lower part of the push rod assembly (26) and the front support slide (24), and when the push rod assembly (26) slides upward or downward relative to the front support rod (21), the sliding linkage mechanism causes the front support slide (24) to also slide upward or downward.

5. The stroller according to claim 4, characterized in that: The frame locking mechanism comprises a whole vehicle locking mechanism arranged between the lower portion of the push rod assembly (26) and the front support rod (21).

6. The baby stroller according to claim 4, characterized in that: The push rod assembly (26) comprises a lower push rod (261) located at the bottom, and an upper push rod (262) located at the top and telescopically arranged up and down with the lower push rod (261); the frame locking mechanism comprises a push rod locking mechanism arranged between the upper push rod (262) and the lower push rod (261).

7. The baby stroller according to any one of claims 1 to 6, characterized in that: The bottom frames (1) on the left and right sides are symmetrically arranged, and the distance between the front wheel assembly (W1) and the rear wheel assembly (W2) when the cart frame is in the unfolded position is greater than the distance between the front wheel assembly (W1) and the rear wheel assembly (W2) when the cart frame is in the folded position; and when the cart frame is in the unfolded position, the front wheel assembly (W1) and the rear wheel assembly (W2) respectively extend downward and stand, and when the cart frame is in the folded position, the front wheel assemblies (W1) on the left and right sides and the rear wheel assemblies (W2) on the left and right sides respectively rotate towards each other and fold towards each other.

8. The baby stroller according to any one of claims 1 to 6, characterized in that: The cart frame further comprises a plurality of cross bars (P2), wherein the plurality of cross bars (P2) are fixedly connected between the side brackets (P1) on the left and right sides to form a rigid cart frame.

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