Stroller

Abstract

The application discloses a child stroller, which comprises a folding joint, a frame and a bearing device. The folding joint comprises a first joint element, a second joint element, a third joint element, a fourth joint element and a fifth joint element. The first joint element and the second joint element are rotationally connected, the second joint element and the third joint element are rotationally connected, the fourth joint element and the fifth joint element are rotationally connected, and the third joint element and the fourth joint element are releasably combined. The bearing device comprises an upper assembly and a lower assembly. The frame comprises a handle assembly and a foot assembly. The lower assembly is connected with the first joint element, the upper assembly is connected with the second joint element, the handle assembly is connected with the fourth joint element, and the foot assembly is connected with the fifth joint element. The bearing device has a first installation posture and a second installation posture which are mirror images. The installation postures of the bearing device are more abundant, and the volume of the whole stroller after folding is roughly the same and very compact in any installation posture.

Description

Technical Field

[0001] This application relates to the technical field of children's strollers, specifically a children's stroller. Background Technology

[0002] Existing strollers, such as the one disclosed in patent document CN211001525U, include a stroller frame and a seat frame. The frame includes front legs, rear legs, and a push rod that are hinged to each other. The seat frame includes a front frame and a rear frame that are hinged to each other. When in use, the seat frame is installed facing forward, with the rear frame close to the push rod. When folded, the front frame rotates to fold closer to the rear frame and rotates with the push rod to fold closer to the rear legs. At the same time, the front legs rotate to fold closer to the rear legs. This stroller only allows the seat frame to be installed facing forward, which limits its use. Utility Model Content

[0003] This application provides a children's stroller that has a wider range of uses and a very compact size when folded.

[0004] This application provides a stroller having an unfolded state and a folded state, including a pair of folding joints, a frame, and a carrying device. The folding joint includes a first joint element, a second joint element, a third joint element, a fourth joint element, and a fifth joint element. The first joint element and the second joint element are rotatably connected, the second joint element and the third joint element are rotatably connected, the fourth joint element and the fifth joint element are rotatably connected, and the third joint element and the fourth joint element are releasably coupled.

[0005] The load-bearing device includes an upper assembly and a lower assembly, the frame includes a handlebar assembly and a foot assembly, the lower assembly is connected to the first joint element, the upper assembly is connected to the second joint element, the handlebar assembly is connected to the fourth joint element, and the foot assembly is connected to the fifth joint element.

[0006] The supporting device has a mirror-symmetrical first installation posture and a second installation posture.

[0007] When folding the stroller in the first installation position, the lower component is flipped upwards to bring it closer to the upper component, and then the handle component is rotated to bring the support device closer to the foot component;

[0008] When folding the stroller in the second mounting position, the lower component is first flipped upwards to bring it closer to the upper component, then the support device is rotated to bring it closer to the handle assembly, and finally the handle assembly is rotated to bring the support device closer to the foot assembly.

[0009] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0010] Optionally, a first locking member is provided between the second joint element and the third joint element. The first locking member has a first locked position and a first unlocked position, and always has a tendency to move from the first unlocked position to the first locked position.

[0011] Optionally, the first locking member is movably mounted on the second joint element, and the third joint element is provided with a plurality of first locking grooves. In the first locking position, the first locking member extends into the first locking groove, and in the first unlocking position, the first locking member exits the first locking groove. At different rotation angles of the second joint element, the first locking member can extend into different first locking grooves.

[0012] Optionally, a second locking member is provided between the third joint element and the fourth joint element. The second locking member has a second locking position and a second unlocking position, and always has a tendency to move from the second unlocking position to the second locking position.

[0013] Optionally, the third joint element has a first limiting portion and a second limiting portion, and the second joint element has a first extreme position and a second extreme position respectively abutting against the first limiting portion and the second limiting portion, and the second joint element can only move between the first extreme position and the second extreme position relative to the third joint element.

[0014] Optionally, a third locking member is provided between the fourth joint element and the fifth joint element. The third locking member has a third locked position and a third unlocked position, and always has a tendency to move from the third unlocked position to the third locked position.

[0015] Optionally, the second joint element includes a positioning part that abuts against the first joint element. When the second joint element rotates in the first direction, the positioning part drives the first joint element to rotate synchronously. When the second joint element rotates in the opposite second direction, the first joint element rotates synchronously by its own weight.

[0016] Optionally, the third joint element has a third limiting portion that abuts against the first joint element to limit its rotation by its own weight to an extreme position.

[0017] Optionally, the stroller includes a sixth joint element, which is rotatably connected to the fourth joint element and / or the fifth joint element.

[0018] In this application, the stroller has two mounting postures. The first joint element rotates and moves closer to the second joint element. Then, depending on the mounting posture, the second joint element can rotate relative to the third joint element and move closer to the fourth joint element. The fourth joint element rotates and moves closer to the fifth joint element. Therefore, the stroller has two usage methods based on the two postures, and the folding volume is very compact. Attached Figure Description

[0019] Figure 1 This is a structural view of a children's stroller according to an embodiment of this application;

[0020] Figure 2 for Figure 1 Structural view showing the middle seat removed from the chassis;

[0021] Figure 3 for Figure 1 A front view of the carrying device of the stroller in its first mounting posture and folded position;

[0022] Figure 4 for Figure 3 Structural view of a children's stroller in its folded-down state;

[0023] Figure 5 The front view of the carrying device of the stroller of this application in a second mounting position;

[0024] Figure 6 for Figure 5 Front view of the carrying device of the stroller in the folded position;

[0025] Figure 7 for Figure 6 The carrying device of the stroller rotates relative to the third joint element and moves closer to the handle assembly in the front view;

[0026] Figure 8 for Figure 7 Structural view of a children's stroller in its folded-down state;

[0027] Figure 9 Switching to the front view of the carrying device of a stroller according to an embodiment of this application, this is a view of the bassinet.

[0028] Figure 10 This is a structural view of the support device and the third joint element according to an embodiment of this application;

[0029] Figure 11 for Figure 10 Exploded view of the upper middle component, lower component, and third joint element;

[0030] Figure 12An exploded view of the fourth and fifth joint elements of a vehicle frame according to an embodiment of this application;

[0031] Figure 13 for Figure 11 Enlarged view of section A in the middle;

[0032] Figure 14 for Figure 13 An exploded view of the first joint element, the second joint element, and the third joint element from another perspective;

[0033] Figure 15 This is a structural view of the first locking member according to an embodiment of this application;

[0034] Figure 16 This is a front view of a carrier device according to an embodiment of this application;

[0035] Figure 17 for Figure 16 A partial sectional view in the BB direction (the first locking element extends into one of the first locking grooves);

[0036] Figure 18 for Figure 16 A partial sectional view in the CC direction (the positioning part abuts against the first guide groove);

[0037] Figure 19 for Figure 16 A partial cross-sectional view in the DD direction (the blocking part is located in the movement path of the first locking member);

[0038] Figure 20 for Figure 16 A partial cross-sectional view in the DD direction (the movement path of the blocking part avoiding the first locking member);

[0039] Figure 21 for Figure 16 A partial sectional view along the BB direction (the first locking element slides to the fourth release position);

[0040] Figure 22 for Figure 16 A partial cross-sectional view in the BB direction (the first locking element has moved to the first limit position);

[0041] Figure 23 for Figure 10 Exploded view of the upper assembly, lower assembly, and third joint element of another embodiment;

[0042] Figure 24 for Figure 23 An exploded view from another perspective;

[0043] Figure 25 for Figure 23 Enlarged view of section E in the middle;

[0044] Figure 26 for Figure 24 Enlarged view of section F in the middle.

[0045] The annotations in the figure are explained as follows:

[0046] 110. First joint element; 111. Blocking part; 112. First guide groove; 113. Limiting groove;

[0047] 120. Second joint element; 121. First locking element; 1211. First locking block; 1212. Second locking block; 122. Positioning part; 123. First arc-shaped groove; 124. Second arc-shaped groove;

[0048] 130. Third joint element; 131. First connecting part; 132. First limiting part; 133. Second limiting part; 134. Second guide groove; 135. Second locking element; 136. First locking groove; 137. Third limiting part;

[0049] 140. Fourth joint element; 141. Second joint; 1411. Second locking groove;

[0050] 150. Fifth joint component;

[0051] 160. Damping components;

[0052] 200. Frame; 210. Handlebar assembly; 220. Front leg assembly; 230. Rear leg assembly;

[0053] 300, load-bearing device; 310, upper component; 320, lower component; 330, first connecting rod; 340, second connecting rod; 350, support rod; 360, cloth bag. Detailed Implementation

[0054] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0055] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between. When a component is said to be "set on" another component, it can be directly set on the other component or it may be set to a component in between.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0057] In this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number or order of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] like Figure 1 As shown in the figure, this application provides a folding joint that can be installed on a corresponding vehicle, such as a child chair or a stroller shown in the figure. For ease of understanding, the structural features of the folding joint are described below using a stroller as an example.

[0059] like Figure 1 , Figures 10-14 As shown, the folding joint includes a first joint element 110, a second joint element 120, a third joint element 130, a fourth joint element 140, and a fifth joint element 150. The stroller includes a frame 200 and a support device 300. The folding joints are arranged in pairs. The corresponding frame 200 includes two oppositely arranged side frames. Each side frame includes a foot assembly and a handle assembly 210. The foot assembly includes a front foot assembly 220 and a rear foot assembly 230. The fourth joint element 140 and the handle assembly 210 are fixedly connected. One of the front foot assembly 220 and the rear foot assembly 230 is fixedly connected to the fifth joint element 150. The fourth joint element 140 and the fifth joint element 150 are rotatably connected so that the handle assembly 210 can rotate to close to the foot frame. Specifically, the rear leg assembly 230 and the fifth joint element 150 are fixedly connected, the front leg assembly 220 and the rear leg assembly 230 are rotatably connected and a linkage component is provided between them and the handlebar assembly 210. When the frame 200 is folded, the handlebar assembly 210 rotates and drives the front leg assembly 220 to rotate and move closer to the rear leg assembly 230. When the frame 200 is unfolded, the handlebar assembly 210 rotates and drives the front leg assembly 220 to rotate and move closer to the rear leg assembly 230.

[0060] To ensure the frame 200 remains stably deployed, in one embodiment, a third locking member is provided between the fourth joint element 140 and the fifth joint element 150. The third locking member has a third locked position and a third unlocked position, and constantly tends to move from the third unlocked position to the third locked position. For example, the third locking member is slidably mounted on the fourth joint element 140. In the third locked position, the third locking member extends into the third locking groove of the fifth joint element 150, restricting the rotation of the fourth joint element 140. In the third unlocked position, the third locking member exits the third locking groove, allowing the fourth joint element 140 to rotate and approach the fifth joint element 150. A reset member, such as a spring, is provided within the fourth joint element 140. The spring acts on the third locking member, causing it to tend to move from the third unlocked position to the third locked position.

[0061] The support device 300 is used to support a child and includes an upper component 310 and a lower component 320. The upper component 310 is a U-shaped frame and its two ends are fixedly connected to two second joint elements 120. The lower component 320 is a U-shaped frame and its two ends are fixedly connected to two first joint elements 110. The first joint elements 110 and the second joint elements 120 are rotatably connected, such that the lower component 320 has a folded position that flips upward (i.e., the second direction below) and approaches the upper component 310, and an unfolded position that flips downward (i.e., the first direction below) and moves away from the upper component 310.

[0062] The third joint element 130 has a first connecting portion 131, and the fourth joint element 140 has a second connecting portion 141. The third joint element 130 and the fourth joint element 140 are releasably connected through the first connecting portion 131 and the second connecting portion 141. A second locking member 135 is provided between the third joint element 130 and the fourth joint element 140. The second locking member 135 has a second locked position and a second unlocked position, and always tends to move from the second unlocked position to the second locked position. The second locking member 135 is slidably mounted on the first connecting portion 131 of the third joint element 130. The second connecting portion 141 is provided with a second locking groove 1411 that is adapted to the second locking member 135. In the installed posture, the second locking member 135 extends into the second locking groove 1411 to restrict the separation of the two connecting portions, and the second locking member 135 exits the second locking groove 1411 to allow the two connecting portions to separate. The third joint element 130 is provided with a reset member, such as a spring, which acts on the second locking member 135 to make it have a tendency to move from the second unlocking position to the second locking position.

[0063] like Figure 14 and Figure 18As shown, in one embodiment, the second joint element 120 includes a positioning part 122, and the first joint element 110 is provided with a first guide groove 112 that cooperates with the positioning part 122. In the unfolded position, the positioning part 122 abuts against the groove wall of the first guide groove 112, thereby restricting the first joint element 110 from rotating relative to the second joint element 120 along a first direction, and allowing it to rotate along the opposite second direction to switch to the folded position. In the unfolded position, the second joint element 120 can be rotated along the first direction, and the first joint element 110 rotates synchronously along the first direction by its own weight, or the second joint element 120 can be rotated along the second direction. The positioning part 122 drives the first joint element 110 to rotate along the second direction to realize the change of the angle between the first joint element 110 and the second joint element 120 relative to the third joint element 130.

[0064] Furthermore, in one embodiment, a damping member 160 is provided between the first joint element 110 and the second joint element 120 to increase the friction between them. As shown in the figure, the damping member 160 is slidably mounted on the first joint element 110, and the second joint element 120 is provided with a first arc-shaped groove 123 and a second arc-shaped groove 124. The end of the damping member 160 is an arc surface that cooperates with the arc-shaped groove. In the unfolded position, the damping member 160 extends into the first arc-shaped groove 123, generating a large damping force to restrict the first joint element 110 from rotating and approaching the second joint element 120 in the second direction. When folded, sufficient external force needs to be applied manually for the damping member 160 to disengage from the first arc-shaped groove 123. In the folded position, the damping member 160 extends into the second arc-shaped groove 124, similarly generating a large damping force to restrict the first joint element 110 from rotating away from the second joint element 120. When unfolded, sufficient external force needs to be applied manually for the damping member 160 to disengage from the second arc-shaped groove 124. The first joint element 110 is provided with a spring that acts on the damping element 160 to move it toward the second joint element 120.

[0065] In one embodiment, the first joint element 110, the second joint element 120 and the third joint element 130 are coaxially rotatably connected, with the second joint element 120 located between the first joint element 110 and the third joint element 130.

[0066] Re- Figure 1 For example, when a stroller is placed on a horizontal plane, the left and right sides are located on either side of the vertical axis of the third joint element 130. The two joints have a first mounting posture and a second mounting posture, and the corresponding support device also has a first mounting posture and a second mounting posture. Figure 1 As shown, in the first installation posture and with the support device in the deployed position, the upper component 310 is located on the right side, and the lower component 320 is located on the left side; as Figure 5As shown, in the second installation posture and with the support device in the unfolded position, the upper component 310 is located on the left and the lower component 320 is located on the right.

[0067] Combined with appendix Figure 3 In the first mounting posture, the first joint element 110 rotates upward and approaches the second joint element 120, with both joint elements located on the right side and approaching the handle assembly 210; as Figure 6 As shown, in the second mounting posture, the first joint element 110 rotates upward and approaches the second joint element 120, with both joint elements located on the left side and away from the handle assembly 210. In both mounting postures, the positional relationship between the first joint element 110 and the second joint element 120 is mirror-symmetrical with respect to the vertical axis.

[0068] The second joint element 120 and the third joint element 130 are rotatably connected, allowing the support device 300 to rotate from the left to the right relative to the third joint element 130 in the second mounting posture. The following describes the folding / folding of the entire vehicle:

[0069] like Figure 1 , Figure 3 and Figure 4 As shown, the load-bearing device 300 is mounted on the frame 200 in the first mounting posture. When folding, the lower component 320 is flipped upward along the dotted line and brought closer to the upper component 310. Then, the handlebar component 210 is rotated to bring the load-bearing device 300 closer to the rear foot component 230.

[0070] like Figures 5-8 As shown, the load-bearing device 300 is mounted on the frame 200 in the second mounting posture. When folding, the lower component 320 is flipped upward along the dotted line and brought close to the upper component 310. Then, the load-bearing device 300 is rotated along the dotted line to bring it close to the handlebar component 210. Finally, the handlebar component 210 is rotated to bring the load-bearing device 300 close to the rear foot component 230.

[0071] Therefore, the folding joint of this application allows for more diverse installation postures of the load-bearing device in the corresponding stroller, increasing the usage scenarios, and the overall volume of the stroller after folding is roughly the same regardless of the installation posture.

[0072] In one embodiment, when the support device 300 is in the unfolded position, the upper component 310 and the lower component 320 are coplanar. The support device 300 also includes a cloth pocket 360 (dashed line in the figure), a first connecting rod 330, and a second connecting rod 340. The cloth pocket 360 is fitted onto the upper component 310 and the lower component 320. One end of the first connecting rod 330 is hinged to the upper component 310, and the other end is hinged to the second connecting rod 340. One end of the second connecting rod 340 is hinged to the lower component 320. A support rod 350 for supporting the cloth pocket 360 is connected between the two second connecting rods 340. In the folded position, the first connecting rod 330 and the second connecting rod 340 are close to the upper component 310. In the unfolded position, the first connecting rod 330 and the second connecting rod 340 are away from the upper component 310.

[0073] In one embodiment, the support device 300 has multiple tilt angles in the unfolded position, such as... Figure 9 As shown, for example, the upper component 310 and the lower component 320 are arranged horizontally, and the support device 300 is used as a sleeping box for children to sleep in. Figure 1 and Figure 5 As shown, the upper component 310 and the lower component 320 are arranged at an angle, and the support rod 350 supports the child's buttocks, meaning the carrier is used as a seat. Furthermore, the cloth bag 360 is provided with a movable support pad, which can be adjusted in position according to the specific usage scenario of the carrier to accommodate a child sitting or sleeping.

[0074] To maintain the support device 300 stably in the deployed position, in one embodiment, a first locking member 121 is provided between the second joint element 120 and the third joint element 130. The first locking member 121 has a first locked position and a first unlocked position, and always has a tendency to move from the first unlocked position to the first locked position. When in the first locked position, the first locking member 121 restricts the rotation of the second joint element 120 relative to the third joint element 130. Specifically, the first locking member 121 is movably mounted on the second joint element 120, for example... Figures 15-19 The first locking member 121 is slidably mounted radially on the second joint element 120. A first locking block 1211 protrudes from the first locking member 121 towards the third joint element 130 along the rotation axis. The third joint element 130 has multiple first locking grooves 136 that mate with the first locking block 1211. The second joint element 120 contains a reset member, such as a spring, that acts on the first locking member 121, allowing the first locking member 121 to tend to move from a first unlocked position to a first locked position. The upper assembly 310 also includes an unlocking member that drives the first locking member 121 to move from the first locked position to the first unlocked position. A traction line connects the unlocking member and the first locking member 121 to achieve remote linkage.

[0075] The first locking groove 136 is arranged in multiple ways around the rotation axis. In the first locked position, the first locking member 121 extends into the first locking groove 136. In the first unlocked position, the first locking member 121 exits the first locking groove 136. The first locking member 121 can extend into different first locking grooves 136. The second joint element 120 has multiple tilt angles corresponding to the bearing device 300 in the unfolded position at different rotation angles.

[0076] In one embodiment, in a first mounting posture, the first locking member 121 extends into one of the first locking grooves 136, and the upper assembly 310 and the handle assembly 210 are generally parallel.

[0077] like Figures 19-22 As shown, in one embodiment, the third joint element 130 has a first limiting portion 132 and a second limiting portion 133, and the second joint element 120 has a first extreme position and a second extreme position respectively abutting against the first limiting portion 132 and the second limiting portion 133. The second joint element 120 can only move between the first extreme position and the second extreme position relative to the third joint element 130. In the figure, the third joint element 130 is provided with a second guide groove 134 extending about the rotation axis, and the two end walls of the second guide groove 134 are the first limiting portion 132 and the second limiting portion 133, respectively.

[0078] The load-bearing device 300 is mounted on the frame 200 in the second mounting posture. After the load-bearing device 300 is folded, it rotates towards the handlebar assembly 210. During this process, the first locking block 1211 of the first locking member 121 enters the second guide groove 134 and abuts against the first limiting part 132. At this time, the upper assembly 310 and the handlebar assembly 210 are roughly parallel, and the load-bearing device 300 remains stationary under the action of gravity.

[0079] When the support device 300 is in the unfolded position and its tilt angle is being adjusted, for example, when the upper component 310 is held to drive the support device 300 from horizontal to tilted, i.e., the lower component 320 rotates downwards, there is a safety hazard that the lower component 320 may rotate too much, causing a child to fall. Figures 23-26 As shown, in one embodiment, the third joint element 130 has a third limiting portion 137, and a limiting groove 113 adapted to the third limiting portion 137 is provided on the first joint element 110. The first joint element 110 has a third extreme position where it rotates downward by its own weight and abuts against the third limiting portion 137. During the adjustment of the angle of the bearing device, for example, when the lower component 320 rotates downward, the groove wall of the limiting groove 113 abuts against the third limiting portion 137 and is restricted from continuing to rotate downward. At this time, the lower component 320 is in the position where... Figure 1 and Figure 5The angle shown. In this case, one end of the limiting groove 113 is open, and when the bearing device 300 is in the folded position, the third limiting part 137 exits the limiting groove 113.

[0080] To facilitate adjustment of the tilt angle of the support device 300 in the unfolded position, and to restrict the upper component 310 of the support device 300 from rotating to the right in the second installation posture, thereby improving safety, in one embodiment, the first locking member 121 has a fourth unlocking position different from the first unlocking position on its own movement path. The first locking member 121 has a second locking block 1212 protruding from the first joint element 110 along the rotation axis. The first joint element 110 has a blocking part 111 that cooperates with the second locking block 1212. Figure 19 and Figure 20 (Thick solid line in the image) In the unfolded position, the supporting device 300 has the blocking part 111 positioned on the movement path of the first locking member 121. During the sliding process of the first locking member 121, the blocking part 111 abuts against the second locking block 1212, restricting the first locking member 121 from sliding to the fourth unlocking position. Correspondingly, the first locking block 1211 cannot enter the second guide groove 134, thereby restricting the second joint element 120 from rotating to the first limit position. At the same time, the first locking member 121 is in the first unlocking position, allowing switching between the first locking grooves 136.

[0081] When the support device 300 is in the folded position, the blocking part 111 exits the movement path of the first locking member 121, avoids the second locking block 1212, and allows the first locking member 121 to slide to the fourth unlocking position. The first locking block 1211 enters the second guide groove 134, thereby allowing the second joint element 120 to rotate to the first limit position.

[0082] The stroller with the folding joint of this application has two mounting positions for the support device, and the final folded volume is approximately the same regardless of the mounting position.

[0083] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0084] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are quite specific and detailed. However, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A pushchair having an unfolded condition and a folded condition, characterised in that, The child stroller comprises a pair of folding joints, a frame and a bearing device, the folding joints comprise a first joint element, a second joint element, a third joint element, a fourth joint element and a fifth joint element, the first joint element and the second joint element are rotatably connected, the second joint element and the third joint element are rotatably connected, the fourth joint element and the fifth joint element are rotatably connected, and the third joint element and the fourth joint element are releasably combined; the bearing device comprises an upper assembly and a lower assembly, the frame comprises a handle assembly and a foot assembly, the lower assembly is connected with the first joint element, the upper assembly is connected with the second joint element, the handle assembly is connected with the fourth joint element, and the foot assembly is connected with the fifth joint element; the bearing device has a first installation posture and a second installation posture which are mirror images of each other; when folding the child stroller in the first installation posture, the lower assembly is first turned upward to approach the upper assembly, and then the handle assembly is turned to approach the bearing device and the foot assembly; when folding the child stroller in the second installation posture, the lower assembly is first turned upward to approach the upper assembly, then the bearing device is turned to approach the handle assembly, and finally the handle assembly is turned to approach the bearing device and the foot assembly.

2. The stroller of claim 1, wherein, A first locking member is arranged between the second joint element and the third joint element, the first locking member has a first locking position and a first releasing position, and always has a tendency to move from the first releasing position to the first locking position.

3. The stroller of claim 2, wherein, The first locking member is movably arranged on the second joint element, the third joint element is provided with a plurality of first locking grooves, in the first locking position, the first locking member extends into the first locking grooves, in the first releasing position, the first locking member exits the first locking grooves, and at different rotation angles of the second joint element, the first locking member can extend into different first locking grooves.

4. The stroller of claim 1, wherein, A second locking member is arranged between the third joint element and the fourth joint element, the second locking member has a second locking position and a second releasing position, and always has a tendency to move from the second releasing position to the second locking position.

5. The stroller of claim 1, wherein, The third joint element has a first limiting portion and a second limiting portion, the second joint element has a first extreme position and a second extreme position which abut against the first limiting portion and the second limiting portion respectively, and the second joint element can only move between the first extreme position and the second extreme position relative to the third joint element.

6. The stroller of claim 1, wherein, A third locking member is arranged between the fourth joint element and the fifth joint element, the third locking member has a third locking position and a third releasing position, and always has a tendency to move from the third releasing position to the third locking position.

7. The stroller of claim 1, wherein, The second joint element comprises a positioning portion abutting against the first joint element, the first joint element is driven to rotate synchronously by the positioning portion when the second joint element rotates in a first direction, and the first joint element rotates synchronously by gravity when the second joint element rotates in a second direction opposite to the first direction.

8. The stroller of claim 7, wherein, The third joint element has a third limiting portion abutting against the first joint element to limit the limit position of the first joint element rotating by gravity.

9. The stroller of claim 1, wherein, The sixth joint element is rotationally connected with the fourth joint element and / or the fifth joint element.

Images