Foldable cart

Abstract

The invention relates to the technical field of carts, in particular to a foldable cart which comprises a push handle, a front support, a rear support, a seat pocket and a backrest. The device further comprises a first connecting piece and a locking assembly. The two ends of the first connecting piece are rotationally arranged on the front support and the rear support respectively. The locking assembly comprises a first locking mechanism which is partially arranged on any one of the front support and the rear support and partially arranged on the push handle, and the first locking mechanism serves as a mechanism for locking any one of the front support and the rear support and the push handle; and the second locking mechanism is partially arranged on the seat pocket, partially arranged on the backrest and partially arranged on the push handle, and is used as a mechanism for locking the seat pocket and the backrest and unlocking the first locking mechanism. By reducing the workload of the cart in the folding stage, the travel efficiency and the use experience of a user are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of strollers, and in particular to a foldable stroller. Background Art

[0002] In modern parenting life, baby strollers, as key tools to ensure the safety and comfort of infants during travel, have become essential items for many families. In particular, baby strollers with a foldable seat basket are deeply favored by parents because they combine riding comfort and storage convenience. Such baby strollers can provide a stable and comfortable riding space for babies, and at the same time, when not in use, they can be folded to significantly reduce the occupied space, making it convenient for storage and carrying, meeting the diverse needs of family travel. Currently, for the common baby strollers with a foldable seat basket on the market, the folding operation process is usually rather cumbersome. Generally, the user needs to first perform a folding operation on the seat basket part, such as adjusting the backrest angle of the seat basket. After completing the folding of the seat basket, then operate the frame part, such as pulling the folding switch on the frame and pressing the relevant buckles to fold the frame, finally achieving the fully folded state of the baby stroller. In this way of folding the seat basket first and then the frame, the folding process involves more steps and is complex, reducing the travel efficiency and affecting the user experience.

[0003] Therefore, how to solve the deficiencies of the above-mentioned existing technologies has become the subject to be studied and solved by the present invention. Summary of the Invention

[0004] The purpose of the present invention is to provide a foldable stroller.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: A foldable stroller includes a push handle, a front bracket, a rear bracket, a seat basket, and a backrest that are rotatably provided with each other; It further includes a first connecting member and a locking assembly; Wherein, both ends of the first connecting member are rotatably provided on the front bracket and the rear bracket respectively; The locking assembly includes: A first locking mechanism, which is partially provided on any one of the front bracket and the rear bracket and partially provided on the push handle, and serves as a mechanism for locking any one of the front bracket and the rear bracket and the push handle; A second locking mechanism, which is partially provided on the seat basket, partially provided on the backrest, and partially provided on the push handle, and serves as a mechanism for locking the seat basket and the backrest and for unlocking the first locking mechanism.

[0006] In some embodiments, the foldable stroller includes armrests, and the armrests are rotatably provided relative to the push handle, the front bracket, the rear bracket, the seat basket, and the backrest.

[0007] This application is described with the seat pocket, backrest and the following second connecting member rotating coaxially, but it does not limit the non - coaxial rotation of the three.

[0008] Taking the front bracket as an example, the push handle, rear bracket, seat pocket and backrest are referred to this description as follows: The front bracket can be understood as a bracket assembly, which can only include the bracket structure, or can also include the bracket structure and the roller structure. The shape of the bracket structure is not limited. For a specific setting case of the front bracket, refer to the attached drawings.

[0009] Structures such as the push handle, front bracket, rear bracket, seat pocket and backrest are existing settings themselves. For their specific functions, reference can be made to the existing ones. For example, the user can sit on the seat pocket and the backrest supports the user's back.

[0010] In the above - mentioned solution, the first locking mechanism can first lock the push handle to restrict its folding and storage during the use stage. Secondly, the first locking mechanism can directly lock any one of the front bracket and the rear bracket. Also, with the help of the first connecting member, when one of the front bracket and the rear bracket is locked, the other is also locked, avoiding setting two locking mechanisms to lock the front bracket and the rear bracket, realizing the structural simplification and cost reduction.

[0011] The second locking mechanism is arranged between the seat pocket, backrest and push handle to lock the seat pocket and backrest.

[0012] The particularity of the second locking mechanism is that it can cause the first locking mechanism to change from the locked state to the unlocked state, thus omitting an unlocking step, reducing the workload of the stroller during the folding stage, and improving the travel efficiency and the user experience.

[0013] It should be noted that the second locking mechanism can, under an external force, cause the first locking mechanism to change from the locked state to the unlocked state, such as by means of the seat pocket or backrest. This application does not limit this.

[0014] A further technical solution is that the first locking mechanism includes a first docking member and a second docking member; The first docking member is movably arranged on any one of the front bracket and the rear bracket and the second docking member is fixedly arranged on the push handle, or, the first docking member is fixedly arranged on any one of the front bracket and the rear bracket and the second docking member is movably arranged on the push handle; The first locking mechanism has a locked state: In the locked state, the first docking member and the second docking member are docked to lock any one of the front bracket and the rear bracket and the push handle.

[0015] When the first locking mechanism is in the locked state, any one of its front locking bracket and rear bracket and the push handle are connected in a way that the first docking member is docked with the second docking member.

[0016] This embodiment involves various transformation forms. For example, the first docking member can be arranged on the front bracket or the rear bracket. Also, the first docking member can be fixedly arranged on the front bracket or movably arranged on the front bracket. By providing more options, it can meet the diverse needs of users.

[0017] In a further technical solution, the first docking member is movably arranged on the rear bracket, and the second docking member is fixedly arranged on the push handle; A groove is provided on the push handle, and the groove forms the second docking member.

[0018] Here, the docking rod is used as an example for the first docking member. The docking rod is connected to the rear bracket. When the docking rod is inserted into the groove, the rear bracket and the push handle cannot rotate relative to each other, thus restricting each other and realizing the locking of the rear bracket and the push handle.

[0019] This embodiment clarifies the way for the first locking mechanism to achieve locking in one case, with a simple structure and quick locking.

[0020] In a further technical solution, it further includes a third reset member, with at least one end acting on the first docking member or the second docking member, as a component for promoting the docking of the first docking member and the second docking member.

[0021] The third reset member promotes the docking of the first docking member and the second docking member, realizing the automatic locking of the corresponding structure by the first locking mechanism during the use stage of the stroller, reducing the operation amount of the user.

[0022] In a further technical solution, the second locking mechanism includes: A second connecting member, arranged on the push handle; A third connecting member, arranged on the seat basket; A fourth connecting member, arranged on the backrest; Among them, a first recess corresponding to the third connecting member and a second recess corresponding to the fourth connecting member are provided on the second connecting member.

[0023] In the second locking mechanism, the seat basket is locked by inserting the third connecting member into the first recess.

[0024] In the second locking mechanism, the backrest is locked by inserting the fourth connecting member into the second recess.

[0025] This embodiment further clarifies the way to lock the seat basket and the backrest. By the cooperation of multiple structures, it restricts the folding of the seat basket and the backrest during the use stage of the stroller, ensuring the stability of the stroller during the use stage.

[0026] Further technical solution, the third connecting member includes: A first locking block, provided corresponding to the first recess; A first traction portion, with two ends respectively connected to the first locking block and the seat pocket; The fourth connecting member includes: A second locking block, provided corresponding to the second recess; A second traction portion, with two ends respectively connected to the second locking block and the backrest.

[0027] Here, the third connecting member is described. For the description of the fourth connecting member, refer to the description of the third connecting member, as follows: The seat pocket can rotate around a certain rotation axis. After the first locking block is inserted into the first recess, the seat pocket remains stationary relative to the second connecting member, ensuring that the seat pocket stably supports and serves the user during the use stage of the stroller; When the first traction portion pulls the first locking block to separate it from the first recess, the seat pocket is unlocked.

[0028] Further technical solution, the second locking mechanism further includes: A first reset member, with one end acting on the third connecting member and the other end acting on the seat pocket or the second connecting member; A second reset member, with one end acting on the fourth connecting member and the other end acting on the backrest or the second connecting member.

[0029] Here, the first reset member is described. For the description of the second reset member, refer to the description of the first reset member, as follows: The first reset member urges the third connecting member to insert into the first recess, realizing the automatic locking of the seat pocket by the second locking mechanism during the use stage of the stroller, further reducing the operation amount of the user and improving the user experience.

[0030] Further technical solution, the second locking mechanism further includes an unlocking member movably disposed on the second connecting member; At least one of the seat pocket and the backrest can cause the first docking member and the second docking member to separate through the unlocking member.

[0031] After the first docking member and the second docking member are docked, the first locking mechanism locks the corresponding structure. In this embodiment, the locking of the rear bracket and the push handle by the first locking mechanism is described.

[0032] Both the seat pocket and the backrest can rotate around a certain rotation axis. When either of them rotates and is stored, the first docking member can be separated from the second docking member by driving the unlocking member, thus omitting the step of unlocking the first locking mechanism. Through this interlocking operation, the operation amount and operation time of the user during the folding stage of the stroller can be reduced, and the user experience and folding efficiency can be improved.

[0033] In a further technical solution, a first inclined surface is provided on the seat pocket, a second inclined surface is provided on the backrest, a third inclined surface corresponding to the first inclined surface and a fourth inclined surface corresponding to the second inclined surface are provided on the unlocking member; The foldable stroller has a first folding state and a second folding state: In the first folding state, the seat pocket rotates, so that the first inclined surface and the third inclined surface act on each other, and the unlocking member is urged to move along the extension direction of the rotation axis of the seat pocket; In the second folding state, the backrest rotates, so that the second inclined surface and the fourth inclined surface act on each other, and the unlocking member is urged to move along the extension direction of the rotation axis of the backrest.

[0034] Through the action of the first inclined surface and the third inclined surface, the seat pocket urges the unlocking member to move along the extension direction of the rotation axis of the seat pocket during rotation, and the backrest relies on the second inclined surface and the fourth inclined surface. The following takes the action process of the seat pocket on the unlocking member as an example: when the seat pocket is folded, it makes a rotational movement. Through the extrusion of the first inclined surface on the third inclined surface, the third inclined surface makes a horizontal movement, so that the unlocking member can approach the first locking mechanism and urge the first docking member to be separated from the second docking member.

[0035] In this embodiment, the rotational movement is converted into a horizontal movement by means of the inclined surface, and the transmission structure between the seat pocket and the unlocking member is omitted, realizing the structural simplification. The simple structure also guarantees the continuous progress of the above-mentioned transmission process.

[0036] In a further technical solution, the unlocking member includes a horizontal moving part and a vertical moving part; The horizontal moving part is movably arranged on the second connecting member; The third inclined surface and the fourth inclined surface are arranged on the horizontal moving part; A fifth inclined surface is provided on the horizontal moving part; The vertical moving part can move vertically relative to the horizontal moving part; A sixth inclined surface corresponding to the fifth inclined surface is provided on the vertical moving part; In the first folding state or the second folding state, the horizontal moving part moves horizontally, so that the fifth inclined surface and the sixth inclined surface act on each other, and the vertical moving part is urged to move vertically.

[0037] Here, a specific case is described to help understanding as follows: During the rotation of the seat pocket, it causes the horizontal moving part to move along the extension direction of the rotation axis of the seat pocket. Through the extrusion of the fifth inclined surface on the sixth inclined surface, the horizontal moving part pushes the vertical moving part downward, and the vertical moving part causes the first docking part and the second docking part to separate.

[0038] Through the setting of this embodiment, when the first docking part and the second docking part separate, one of them can move vertically. Taking the first docking part moving and being arranged in the rear bracket as an example, it is not necessary for the first docking part to move along the thickness direction of the rear bracket, reducing the occupation of the internal space of the rear bracket by the first docking part in the thickness direction of the rear bracket.

[0039] Regarding the "first", "second", etc. used in this article, they do not particularly refer to the order or sequence, nor are they used to limit this case. They are only used to distinguish components or operations described with the same technical terms.

[0040] Regarding the "connection" or "positioning" used in this article, it can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, and can also refer to two or more components or devices operating or acting on each other.

[0041] Regarding the "comprising", "including", "having", etc. used in this article, they are all open-ended terms, that is, they mean including but not limited to.

[0042] Regarding the terms used in this article, unless otherwise specified, they generally have their ordinary meanings in this field, in the context of this case, and in the context of special content. Some terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art regarding the description of this case.

[0043] Regarding the "front", "rear", "upper", "lower", "left", "right", etc. used in this article, they are all directional terms. In this case, they are only used to illustrate the positional relationship between various structures and are not used to limit the protection scheme of this case and the specific direction during actual implementation.

[0044] The working principle and advantages of the present invention are as follows: The first locking mechanism can first lock the push handle to restrict its folding and storage during the use stage. Secondly, the first locking mechanism can directly lock any one of the front bracket and the rear bracket. Also, with the help of the first connecting piece, when one of the front bracket and the rear bracket is locked, the other one is also locked, avoiding setting two locking mechanisms to lock the front bracket and the rear bracket, realizing the simplification of the structure and reducing the cost.

[0045] The second locking mechanism is arranged between the seat pocket, the backrest and the push handle to realize the locking of the seat pocket and the backrest.

[0046] The present application can prompt the first locking mechanism to change from the locked state to the unlocked state by means of the second locking mechanism, thus omitting an unlocking step, reducing the workload of the trolley during the folding stage, and improving the travel efficiency and the user experience. Brief Description of the Drawings

[0047] Figure 1 is a schematic structural diagram of the foldable trolley according to an embodiment of the present invention; Figure 2 is Figure 1 a side view of Figure 3 is one of the schematic partial structural diagrams of the foldable trolley according to an embodiment of the present invention; Figure 4 is another schematic partial structural diagram of the foldable trolley according to an embodiment of the present invention; Figure 5 is a schematic diagram of a state during the folding process of the foldable trolley according to an embodiment of the present invention; Figure 6 is a schematic structural diagram of the seat pocket, the backrest, the armrest and their peripheries according to an embodiment of the present invention; Figure 7 is Figure 6 a schematic diagram of a state after the structure in Figure 8 is one of the schematic exploded partial structural diagrams of the foldable trolley according to an embodiment of the present invention; Figure 9 is another schematic exploded partial structural diagram of the foldable trolley according to an embodiment of the present invention; Figures 10 - 13 is a schematic diagram of the state after the foldable trolley according to an embodiment of the present invention is folded; Figures 14 - 16 is a schematic diagram of the position change of the first inclined plane and the third inclined plane according to an embodiment of the present invention; Figures 17 - 19 is a schematic diagram of the position change of the second inclined plane and the fourth inclined plane according to an embodiment of the present invention.

[0048] In the above accompanying drawings: 1. Push handle; 2. Front bracket; 3. Rear bracket; 4. Seat pocket; 41. First inclined surface; 5. Backrest; 51. Second inclined surface; 6. First connecting member; 71. First locking mechanism; 711. First docking member; 712. Second docking member; 72. Second locking mechanism; 721. Second connecting member; 7211. First recess; 7212. Second recess; 722. Third connecting member; 7221. First locking block; 7222. First traction portion; 723. Fourth connecting member; 7231. Second locking block; 7232. Second traction portion; 724. First reset member; 725. Second reset member; 726. Unlocking member; 7261. Third inclined surface; 7262. Fourth inclined surface; 7263. Horizontal moving portion; 7264. Vertical moving portion; 7265. Fifth inclined surface; 7266. Sixth inclined surface; 8. Armrest; 9. Third reset member. Detailed implementation mode

[0049] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Embodiment: The present case will be clearly described below with diagrams and detailed descriptions. After any person skilled in the art understands the embodiments of the present case, they can make changes and modifications based on the technology taught by the present case, which does not deviate from the spirit and scope of the present case.

[0050] The terms used in this article are only for describing specific embodiments and are not intended to limit the present case. Singular forms such as "a", "this", "this", "the present", and "the" also include plural forms as used in this article.

[0051] See Figures 1 - 19 , a foldable trolley, including a push handle 1, a front bracket 2, a rear bracket 3, a seat pocket 4 and a backrest 5 that are rotatably arranged with each other; It also includes a first connecting member 6 and a locking assembly; Wherein, both ends of the first connecting member 6 are rotatably arranged on the front bracket 2 and the rear bracket 3 respectively; The locking assembly includes: A first locking mechanism 71, partially arranged on any one of the front bracket 2 and the rear bracket 3, and partially arranged on the push handle 1, as a mechanism for locking any one of the front bracket 2 and the rear bracket 3 and the push handle 1; A second locking mechanism 72, partially arranged on the seat pocket 4, partially arranged on the backrest 5, and partially arranged on the push handle 1, as a mechanism for locking the seat pocket 4 and the backrest 5 and for unlocking the first locking mechanism 71.

[0052] In some embodiments, the foldable trolley includes an armrest 8, and the armrest 8 is rotatably arranged relative to the push handle 1, the front bracket 2, the rear bracket 3, the seat pocket 4 and the backrest 5.

[0053] In this application, the seat pocket 4, the backrest 5 and the following second connecting member 721 are described as coaxial rotation, but it does not limit the non - coaxial rotation of the three. The seat pocket 4 can be understood as a seat.

[0054] Taking the front bracket 2 as an example for description, the push handle 1, the rear bracket 3, the seat pocket 4 and the backrest 5 refer to this description as follows: The front bracket 2 can be understood as a bracket assembly, which may only include a bracket structure, or may include a bracket structure and a roller structure. The shape of the bracket structure is not limited. For a specific setting case of the front bracket 2, refer to the attached drawings.

[0055] The structures of the push handle 1, the front bracket 2, the rear bracket 3, the seat pocket 4 and the backrest 5 are existing settings themselves. For specific functions, reference can be made to the existing ones. For example, the user can sit on the seat pocket 4 and the backrest 5 supports the user's back.

[0056] In the above - mentioned solution, the first locking mechanism 71 can first lock the push handle 1 to restrict its folding and storage during the use stage. Secondly, the first locking mechanism 71 can directly lock any one of the front bracket 2 and the rear bracket 3. Also, by means of the first connecting member 6, when one of the front bracket 2 and the rear bracket 3 is locked, the other one is also locked, avoiding setting two locking mechanisms to lock the front bracket 2 and the rear bracket 3, realizing the simplification of the structure and reducing the cost.

[0057] The second locking mechanism 72 is arranged between the seat pocket 4, the backrest 5 and the push handle 1 to realize the locking of the seat pocket 4 and the backrest 5.

[0058] The particularity of the second locking mechanism 72 is that it can cause the first locking mechanism 71 to change from the locked state to the unlocked state, thus omitting an unlocking step, reducing the workload of the stroller during the folding stage, and improving the travel efficiency and the user experience.

[0059] It should be noted that the second locking mechanism 72 can, under the action of an external force, cause the first locking mechanism 71 to change from the locked state to the unlocked state, such as by means of the seat pocket 4 or the backrest 5. This application does not limit this.

[0060] For the state of the stroller after folding, refer to Figures 10 - 13 .

[0061] Refer to Figure 3 , in this embodiment, the first locking mechanism 71 includes a first docking member 711 and a second docking member 712; The first docking member 711 is movably arranged on any one of the front bracket 2 and the rear bracket 3 and the second docking member 712 is fixedly arranged on the push handle 1, or, the first docking member 711 is fixedly arranged on any one of the front bracket 2 and the rear bracket 3 and the second docking member 712 is movably arranged on the push handle 1; The first locking mechanism 71 has a locked state: In the locked state, the first docking member 711 docks with the second docking member 712 to lock any one of the front bracket 2 and the rear bracket 3 and the push handle 1.

[0062] When the first locking mechanism 71 is in the locked state, it locks any one of the front bracket 2 and the rear bracket 3 and the push handle 1 by the docking of the first docking member 711 and the second docking member 712.

[0063] This embodiment involves various transformation forms. For example, the first docking member 711 can be arranged on the front bracket 2 or on the rear bracket 3. For example, the first docking member 711 can be fixedly arranged on the front bracket 2 or movably arranged on the front bracket 2. By providing more selection methods, the diverse needs of users are met.

[0064] See Figure 3 , in this embodiment, the first docking member 711 is movably arranged on the rear bracket 3, and the second docking member 712 is fixedly arranged on the push handle 1; A groove is provided on the push handle 1, and the groove constitutes the second docking member 712.

[0065] Here, the first docking member 711 is taken as a docking rod for illustration. The docking rod is connected to the rear bracket 3. When the docking rod is inserted into the groove, the rear bracket 3 and the push handle 1 cannot rotate relative to each other, so as to restrict each other and realize the locking of the rear bracket 3 and the push handle 1.

[0066] In some embodiments, the first docking member 711 is movably arranged on the front bracket 2.

[0067] This embodiment clarifies the locking method of the first locking mechanism 71 in one case, with simple structure and quick locking.

[0068] The insertion of the first docking member 711 into the groove generally refers to the partial insertion of the first docking member 711 into the groove.

[0069] After the first docking member 711 is inserted into the groove, it can move along the thickness direction of the rear bracket 3 to separate from the groove, or move vertically to separate from the groove. This embodiment does not limit this. The shape of the groove is adjusted adaptively according to different separation situations, and this embodiment also does not limit this.

[0070] See Figures 8 - 9 , in this embodiment, a third reset member 9 is further included, and at least one end acts on the first docking member 711 or the second docking member 712 as a component for promoting the docking of the first docking member 711 and the second docking member 712.

[0071] In some embodiments, the third reset member 9 is set as a reset spring.

[0072] The third reset member 9 urges the first docking member 711 and the second docking member 712 to dock, so as to automatically lock the corresponding structure by the first locking mechanism 71 during the use stage of the trolley, reducing the operation amount of the user.

[0073] The specific connection setting of the third reset member 9 can be adjusted according to the actual situation, as long as the above purpose is satisfied. For example, both ends of the third reset member 9 can be respectively connected to the first docking member 711 and the second docking member 712.

[0074] See Figures 4 - 9 , in this embodiment, the second locking mechanism 72 includes: A second connecting member 721, which is arranged on the push handle 1; A third connecting member 722, which is arranged on the seat pocket 4; A fourth connecting member 723, which is arranged on the backrest 5; Wherein, a first recessed portion 7211 corresponding to the third connecting member 722 and a second recessed portion 7212 corresponding to the fourth connecting member 723 are provided on the second connecting member 721.

[0075] In some embodiments, the second connecting member 721, the third connecting member 722 and the fourth connecting member 723 have the same rotation axis.

[0076] In some embodiments, the second connecting member 721 is integrally provided with the push handle 1. At this time, the second connecting member 721 is regarded as a part of the push handle 1.

[0077] Here, the description of the structural connection and movement setting in the present application is emphasized. Taking the third connecting member 722 as an example, as follows: The third connecting member 722 is arranged on the seat pocket 4, and the two can be detachably connected (such as threaded connection) or non-detachably connected (such as welding); even if it is not emphasized here that the third connecting member 722 can move relative to the seat pocket 4, it cannot be considered that the two remain stationary; even if it is mentioned that the third connecting member 722 can move relative to the seat pocket 4, it cannot be considered that only the whole of the third connecting member 722 can move relative to the seat pocket 4, and it can also be that a part of the third connecting member 722 can move relative to the seat pocket 4.

[0078] In the second locking mechanism 72, the seat pocket 4 is locked by inserting the third connecting member 722 into the first recessed portion 7211.

[0079] In the second locking mechanism 72, the backrest 5 is locked by inserting the fourth connecting member 723 into the second recessed portion 7212.

[0080] This embodiment further clarifies the way to lock the seat basket 4 and the backrest 5. Through the cooperation of multiple structures, the folding of the seat basket 4 and the backrest 5 during the use stage of the stroller is restricted, ensuring the stability of the stroller during the use stage.

[0081] See Figures 8 - 9 , in this embodiment, the third connecting member 722 includes: A first locking block 7221, corresponding to the first recess 7211; A first traction portion 7222, with two ends respectively connected to the first locking block 7221 and the seat basket 4; The fourth connecting member 723 includes: A second locking block 7231, corresponding to the second recess 7212; A second traction portion 7232, with two ends respectively connected to the second locking block 7231 and the backrest 5.

[0082] Here, the third connecting member 722 is described. For the description of the fourth connecting member 723, refer to the description of the third connecting member 722 as follows: The seat basket 4 can rotate around a certain rotation axis. When the first locking block 7221 is inserted into the first recess 7211, the seat basket 4 remains stationary relative to the second connecting member 721, ensuring that the seat basket 4 stably supports and serves the user during the use stage of the stroller; When the first traction portion 7222 pulls the first locking block 7221 to separate it from the first recess 7211, the seat basket 4 is unlocked; In some embodiments, the seat basket 4 has a handle, and the first traction portion 7222 is connected to this handle; In some embodiments, the first traction portion 7222 is provided as a traction wire; In some embodiments, at least a part of the first traction portion 7222 is inside the seat basket 4.

[0083] See Figures 8 - 9 , in this embodiment, the second locking mechanism 72 further includes: A first reset member 724, with one end acting on the third connecting member 722 and the other end acting on the seat basket 4 or the second connecting member 721; A second reset member 725, with one end acting on the fourth connecting member 723 and the other end acting on the backrest 5 or the second connecting member 721.

[0084] Here, the first reset member 724 is described. For the description of the second reset member 725, refer to the description of the first reset member 724 as follows: In some embodiments, the first reset member 724 is provided as a reset spring; The first reset member 724 urges the third connecting member 722 to insert into the first recess 7211, realizing the automatic locking of the second locking mechanism 72 to the seat basket 4 during the use stage of the stroller, further reducing the operation amount of the user and improving the user experience.

[0085] See Figures 4 - 9 , in this embodiment, the second locking mechanism 72 further includes an unlocking member 726 movably disposed on the second connecting member 721; At least one of the seat basket 4 and the backrest 5 can cause the first docking member 711 and the second docking member 712 to separate through the unlocking member 726.

[0086] After the first docking member 711 and the second docking member 712 are docked, the first locking mechanism 71 locks the corresponding structure. In this embodiment, the locking of the rear bracket 3 and the push handle 1 by the first locking mechanism 71 is described.

[0087] Both the seat basket 4 and the backrest 5 can rotate around a certain rotation axis. When any one of them rotates and is received, the first docking member 711 and the second docking member 712 can be separated by driving the unlocking member 726, thus omitting the step of unlocking the first locking mechanism 71. Through this interlocking operation, the operation amount and operation time of the user during the folding stage of the stroller are reduced, and the use experience and folding efficiency are improved.

[0088] In this application, the seat basket 4 and the backrest 5 are described as rotating towards each other after unlocking.

[0089] See Figures 8 - 9 , in this embodiment, a first inclined surface 41 is provided on the seat basket 4, a second inclined surface 51 is provided on the backrest 5, a third inclined surface 7261 corresponding to the first inclined surface 41 and a fourth inclined surface 7262 corresponding to the second inclined surface 51 are provided on the unlocking member 726; The foldable stroller has a first folding state and a second folding state: In the first folding state, the seat basket 4 rotates, so that the first inclined surface 41 and the third inclined surface 7261 interact with each other, urging the unlocking member 726 to move along the extension direction of the rotation axis of the seat basket 4; In the second folding state, the backrest 5 rotates, so that the second inclined surface 51 and the fourth inclined surface 7262 interact with each other, urging the unlocking member 726 to move along the extension direction of the rotation axis of the backrest 5.

[0090] The extension direction of the rotation axis of the seat basket 4 and the extension direction of the rotation axis of the backrest 5 can be regarded as the thickness direction of the rear bracket 3.

[0091] Regarding the unlocking member 726, it should be considered that at least a part of the unlocking member 726 can move along the extension direction of the rotation axis of the seat pocket 4, without restricting the movement of the part of the unlocking member 726 in other directions. The unlocking member 726 can be configured to use a reset structure to achieve the separate reset of the unlocking member 726 (such as setting a reset structure on the vertical moving part 7264 as described below), and specifically refer to each reset member in this application.

[0092] Through the action of the first inclined surface 41 and the third inclined surface 7261, during the rotation of the seat pocket 4, the seat pocket 4 prompts the unlocking member 726 to move along the extension direction of the rotation axis of the seat pocket 4, and the backrest 5 relies on the second inclined surface 51 and the fourth inclined surface 7262. The following takes the action process of the seat pocket 4 on the unlocking member 726 as an example to illustrate: When the seat pocket 4 is folded, it makes a rotational movement. Through the extrusion of the first inclined surface 41 on the third inclined surface 7261, the third inclined surface 7261 makes a horizontal movement, so that the unlocking member 726 can approach the first locking mechanism 71 and prompt the separation of the first docking member 711 and the second docking member 712.

[0093] In this embodiment, the rotational movement is converted into a horizontal movement by means of the inclined surface, and the transmission structure between the seat pocket 4 and the unlocking member 726 is omitted, realizing the simplification of the structure. The simple structure also guarantees the continuous progress of the above-mentioned transmission process.

[0094] See Figures 8 - 9 , in this embodiment, the unlocking member 726 includes a horizontal moving part 7263 and a vertical moving part 7264; The horizontal moving part 7263 is movably arranged on the second connecting member 721; The third inclined surface 7261 and the fourth inclined surface 7262 are arranged on the horizontal moving part 7263; A fifth inclined surface 7265 is provided on the horizontal moving part 7263; The vertical moving part 7264 can move vertically relative to the horizontal moving part 7263; A sixth inclined surface 7266 is provided on the vertical moving part 7264 corresponding to the fifth inclined surface 7265; In the first folding state or the second folding state, the horizontal moving part 7263 moves horizontally, so that the fifth inclined surface 7265 and the sixth inclined surface 7266 act on each other to prompt the vertical moving part 7264 to move vertically.

[0095] The vertical moving part 7264 can be arranged on the push handle 1, the front bracket 2 or the rear bracket 3. This embodiment does not limit this, as long as the requirements of this embodiment are met.

[0096] Here, a specific case is described to help understanding as follows: During the rotation of the seat pocket 4, it causes the horizontal moving part 7263 to move along the extension direction of the rotation axis of the seat pocket 4. Through the extrusion of the fifth inclined surface 7265 on the sixth inclined surface 7266, the horizontal moving part 7263 pushes the vertical moving part 7264 to move downward, and the vertical moving part 7264 causes the first docking part 711 to separate from the second docking part 712.

[0097] Through the setting of this embodiment, when the first docking part 711 separates from the second docking part 712, one of them can move vertically. Taking the first docking part 711 moving and being arranged in the rear bracket 3 as an example, it is not necessary for the first docking part 711 to move along the thickness direction of the rear bracket 3, reducing the occupation of the internal space of the rear bracket 3 by the first docking part 711 in the thickness direction of the rear bracket 3.

[0098] The working principle in a specific embodiment of this application is as follows: The first traction part 7222 drives the first lock block 7221 to separate it from the first recessed part 7211, and the second traction part 7232 drives the second lock block 7231 to separate it from the second recessed part 7212. At this time, the seat pocket 4 and the backrest 5 are unlocked; The seat pocket 4 rotates towards the backrest 5, or the backrest 5 rotates towards the seat pocket 4. By pressing the corresponding inclined surface (such as the third inclined surface 7261) on the horizontal moving part 7263 through its own inclined surface (such as the first inclined surface 41), the horizontal moving part 7263 moves horizontally; The fifth inclined surface 7265 on the horizontal moving part 7263 presses the sixth inclined surface 7266 on the vertical moving part 7264, causing the vertical moving part 7264 to move vertically and prompting the first docking part 711 to separate from the second docking part 712, realizing the unlocking of the push handle 1, the front bracket 2, and the rear bracket 3.

[0099] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable those familiar with this technology to understand the content of the present invention and implement it accordingly, and cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A foldable trolley, characterized in that: It includes a push handle (1), a front bracket (2), a rear bracket (3), a seat pocket (4) and a backrest (5) which are rotatably arranged relative to each other; It further includes a first connecting piece (6) and a locking assembly; Wherein, both ends of the first connecting piece (6) are rotatably arranged on the front bracket (2) and the rear bracket (3) respectively; The locking assembly includes: A first locking mechanism (71), partially arranged on any one of the front bracket (2) and the rear bracket (3), and partially arranged on the push handle (1), serving as a mechanism for locking any one of the front bracket (2) and the rear bracket (3) and the push handle (1); A second locking mechanism (72), partially arranged on the seat pocket (4), partially arranged on the backrest (5), and partially arranged on the push handle (1), serving as a mechanism for locking the seat pocket (4) and the backrest (5) and for unlocking the first locking mechanism (71).

2. The foldable trolley according to claim 1, wherein: The first locking mechanism (71) includes a first docking piece (711) and a second docking piece (712); The first docking piece (711) is movably arranged on any one of the front bracket (2) and the rear bracket (3) and the second docking piece (712) is fixedly arranged on the push handle (1), or, the first docking piece (711) is fixedly arranged on any one of the front bracket (2) and the rear bracket (3) and the second docking piece (712) is movably arranged on the push handle (1); The first locking mechanism (71) has a locking state: In the locking state, the first docking piece (711) is docked with the second docking piece (712) to lock any one of the front bracket (2) and the rear bracket (3) and the push handle (1).

3. The foldable trolley according to claim 2, wherein: The first docking piece (711) is movably arranged on the rear bracket (3), and the second docking piece (712) is fixedly arranged on the push handle (1); A groove is provided on the push handle (1), and the groove forms the second docking piece (712).

4. The foldable trolley according to claim 2, characterized in that: It further includes a third reset piece (9), with at least one end acting on the first docking piece (711) or the second docking piece (712), serving as a component for promoting the docking of the first docking piece (711) and the second docking piece (712).

5. The foldable trolley according to claim 2, characterized in that: The second locking mechanism (72) includes: A second connecting piece (721), arranged on the push handle (1); A third connecting piece (722), arranged on the seat pocket (4); A fourth connecting piece (723), arranged on the backrest (5); Wherein, a first recessed portion (7211) corresponding to the third connecting piece (722) and a second recessed portion (7212) corresponding to the fourth connecting piece (723) are provided on the second connecting piece (721).

6. The foldable trolley according to claim 5, characterized in that: The third connecting piece (722) includes: A first lock block (7221), arranged corresponding to the first recessed portion (7211); A first traction portion (7222), with both ends respectively connected to the first lock block (7221) and the seat pocket (4); The fourth connecting piece (723) includes: A second lock block (7231), arranged corresponding to the second recessed portion (7212); The second traction part (7232) is connected at both ends to the second lock block (7231) and the backrest (5) respectively.

7. The foldable trolley according to claim 5, characterized in that: The second locking mechanism (72) further includes: A first reset member (724), with one end acting on the third connecting member (722) and the other end acting on the seat pocket (4) or the second connecting member (721); A second reset member (725), with one end acting on the fourth connecting member (723) and the other end acting on the backrest (5) or the second connecting member (721).

8. The foldable trolley according to claim 5, wherein: The second locking mechanism (72) further includes an unlocking member (726) movably disposed on the second connecting member (721); At least one of the seat pocket (4) and the backrest (5) can cause the first docking member (711) and the second docking member (712) to separate through the unlocking member (726).

9. The foldable trolley according to claim 8, wherein: The seat pocket (4) is provided with a first inclined surface (41), the backrest (5) is provided with a second inclined surface (51), and the unlocking member (726) is provided with a third inclined surface (7261) corresponding to the first inclined surface (41) and a fourth inclined surface (7262) corresponding to the second inclined surface (51); The foldable stroller has a first folding state and a second folding state: In the first folding state, the seat pocket (4) rotates, such that the first inclined surface (41) and the third inclined surface (7261) interact with each other, causing the unlocking member (726) to move along the extension direction of the rotation axis of the seat pocket (4); In the second folding state, the backrest (5) rotates, such that the second inclined surface (51) and the fourth inclined surface (7262) interact with each other, causing the unlocking member (726) to move along the extension direction of the rotation axis of the backrest (5).

10. A foldable trolley according to claim 9, characterized in that: The unlocking member (726) includes a horizontal moving part (7263) and a vertical moving part (7264); The horizontal moving part (7263) is movably disposed on the second connecting member (721); The third inclined surface (7261) and the fourth inclined surface (7262) are disposed on the horizontal moving part (7263); The horizontal moving part (7263) is provided with a fifth inclined surface (7265); The vertical moving part (7264) can move vertically relative to the horizontal moving part (7263); The vertical moving part (7264) is provided with a sixth inclined surface (7266) corresponding to the fifth inclined surface (7265); In the first folding state or the second folding state, the horizontal moving part (7263) moves horizontally, such that the fifth inclined surface (7265) and the sixth inclined surface (7266) interact with each other, causing the vertical moving part (7264) to move vertically.

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