Trolley

Abstract

The utility model relates to the technical field of children products, and discloses a cart which comprises a supporting bottom frame, a push rod assembly and a bearing frame. One end of the push rod assembly is rotationally connected to the supporting bottom frame around the first axis, and the push rod assembly can rotate to be close to the supporting bottom frame. The bearing frame is rotationally connected to the supporting bottom frame around the first axis and connected with the push rod assembly. When the push rod assembly is driven to rotate and approach relative to the supporting bottom frame, the push rod assembly can drive the bearing frame to approach the supporting bottom frame synchronously. As the push rod assembly is fixedly connected with the bearing frame, when the push rod assembly is rotated and folded, the push rod assembly can drive the bearing frame to be close to the supporting bottom frame together. According to the technical scheme, when the cart is folded, the push rod assembly and the bearing frame synchronously draw close to the supporting bottom frame, the push rod assembly and the bearing frame do not need to be independently folded, and therefore the operation steps when the cart is folded are reduced, rapid folding of the cart can be achieved, the operation convenience of cart folding is improved, and the use experience feeling of a user is improved.

Description

Technical Field

[0001] This utility model relates to the field of children's products technology, and in particular to a stroller. Background Technology

[0002] A stroller is a portable mode of transportation designed specifically for infants and toddlers, aiming to provide convenience while ensuring the comfort and safety of children. Strollers typically include a frame, seat, wheels, and push rod.

[0003] To facilitate outdoor outings, most strollers are equipped with folding functions for easy storage and carrying. However, in actual use, existing strollers require users to fold multiple parts, such as the push rod and seat, separately, making the folding process cumbersome and inconvenient for users. This is especially true when quick storage or one-handed operation is needed, as the design of these strollers becomes particularly inconvenient and reduces the user experience.

[0004] Therefore, there is an urgent need for a trolley to solve the above problems. Utility Model Content

[0005] Based on the above problems, the purpose of this utility model is to provide a trolley that can reduce the number of steps required to fold the trolley, improve the convenience of folding the trolley, and enhance the user experience.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A trolley is provided, comprising:

[0008] Support frame;

[0009] A push rod assembly, one end of which is rotatably connected to the support base about a first axis, and the push rod assembly is rotatable to approach the support base;

[0010] The support frame is rotatably connected to the support base frame about the first axis and is connected to the push rod assembly;

[0011] When the push rod assembly is driven to rotate and move closer to the support base, the push rod assembly can drive the bearing frame to move closer to the support base synchronously.

[0012] As an optional embodiment of the trolley of this utility model, the push rod assembly is provided with a first joint head, the support frame is provided with a second joint head, the first joint head and the second joint head are fixedly connected, and the first joint head and the second joint head are coaxially rotatably connected to the support base frame.

[0013] As an optional solution for the trolley of this utility model,

[0014] The first joint head is provided with a first insertion part, and the second joint head is provided with a second insertion part. The first insertion part and the second insertion part are inserted into each other along the first axis direction and are limited and fitted in the circumferential direction.

[0015] And / or,

[0016] The first joint head or the second joint head is provided with a connecting part, and the first joint head and the second joint head are connected through the connecting part;

[0017] And / or,

[0018] Both the first joint head and the second joint head have two sets symmetrically arranged, with the two sets of second joint heads positioned between the two sets of first joint heads;

[0019] The trolley also includes a connecting shaft, the two ends of which are respectively connected to two sets of the second joint heads;

[0020] And / or,

[0021] The support frame includes a support part, on which a connector seat is provided, and a support part is provided on the second joint head, the support part being connected to the connector seat.

[0022] As an optional embodiment of the trolley of this utility model, the first joint head is provided with a first insertion part, and the second joint head is provided with a second insertion part and a connecting part.

[0023] One of the first and second insertion portions is provided with a limiting protrusion, and the other is provided with a limiting groove. The limiting protrusion engages with the limiting groove to circumferentially limit the first and second insertion portions; and / or,

[0024] The connecting portion is arranged at an angle to the second insertion portion; and / or

[0025] The push rod assembly includes a push rod, and the first joint head includes a connecting tube connected to the push rod, and the connecting part is detachably fixedly connected to the connecting tube or the push rod;

[0026] The connecting portion is at least partially in the same direction of extension as the connecting tube or the push rod.

[0027] As an optional embodiment of the trolley of this utility model, the supporting base includes a front support and a rear support that are rotatably connected around the first axis. The rear support is provided with a third joint head, and the front support is provided with a fourth joint head. The third joint head and the fourth joint head are coaxially disposed between the first joint head and the second joint head.

[0028] As an optional solution for the trolley of this utility model, the first joint head is provided with a first insertion part, the second joint head is provided with a second insertion part, the first insertion part and the second insertion part are inserted into each other along the first axis direction to form a mounting shaft, and the third joint head and the fourth joint head are rotatably disposed on the mounting shaft;

[0029] The outer periphery of the first plug portion and / or the second plug portion is at least partially arc-shaped.

[0030] As an optional solution for the trolley of this utility model, a first locking member movable along the first axis is provided between the first joint head and the third joint head. The first locking member is used to lock the first joint head and the third joint head to restrict the relative rotation of the first joint head and the third joint head.

[0031] A second locking member is provided between the third joint head and the fourth joint head, which is movable along the first axis. The second locking member is used to lock the third joint head and the fourth joint head to restrict the relative rotation of the third joint head and the fourth joint head.

[0032] As an optional embodiment of the trolley of this utility model, a first unlocking member is provided between the first joint head and the first locking member. The first unlocking member is capable of rotating around the first axis and moving along the first axis.

[0033] The first joint head is provided with a first mating part, and the first unlocking member is provided with a second mating part. When the first unlocking member rotates, the first mating part and the second mating part cooperate to drive the first locking member to move toward the position of unlocking the first joint head and the third joint head.

[0034] As an optional embodiment of the stroller of this utility model, one of the first locking member and the second locking member is provided with a second unlocking member, and the second unlocking member is located between the first locking member and the second locking member. When the first unlocking member drives the first locking member to move toward the position of unlocking the first joint head and the third joint head, the first locking member drives the second locking member to move toward the position of unlocking the third joint head and the fourth joint head through the second unlocking member.

[0035] And / or, the push rod assembly is provided with an operating part and a traction cable. The operating part is connected to the first unlocking member through the traction cable. When an external force is applied to the operating part, the traction cable can drive the first unlocking member to rotate around the first axis.

[0036] As an optional solution for the trolley of this utility model,

[0037] An elastic reset member is provided between the second locking member and the fourth joint head, and the second locking member can move toward the position of locking the third joint head and the fourth joint head under the elastic force of the elastic reset member;

[0038] When one of the first locking member and the second locking member is provided with a second unlocking member, when the second locking member moves toward the position of locking the third joint head and the fourth joint head, the first locking member can be driven to move toward the position of locking the first joint head and the third joint head by the second unlocking member;

[0039] And / or,

[0040] The first joint head is provided with a first locking groove, and the third joint head is provided with a second locking groove. When the first locking member is engaged with both the first locking groove and the second locking groove, the first joint head is locked with the third joint head. When the first locking member disengages from the first locking groove and engages with the second locking groove, the first joint head is unlocked with the third joint head.

[0041] And / or,

[0042] The third joint head is provided with a third locking groove, and the fourth joint head is provided with a fourth locking groove. When the second locking member is engaged with both the third locking groove and the fourth locking groove, the third joint head and the fourth joint head are locked. When the second locking member disengages from the third locking groove and engages with the fourth locking groove, the third joint head and the fourth joint head are unlocked.

[0043] The beneficial effects of this utility model are as follows:

[0044] The trolley provided by this utility model features a push rod assembly and a support frame that are rotatably connected to the support base around the same axis (the first axis). Furthermore, the push rod assembly is fixedly connected to the support frame. This allows the push rod assembly to move the support frame towards the support base when it is rotated to fold. In other words, when folding the trolley, the push rod assembly and the support frame rotate and move towards the support base synchronously, eliminating the need to fold the push rod assembly and the support frame separately. This reduces the number of steps required to fold the trolley, facilitating rapid folding and improving the ease of operation. This meets users' needs for convenience and efficiency, enhancing the user experience. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the structure of the trolley provided in a specific embodiment of this utility model;

[0047] Figure 2 This is a schematic diagram of the folding principle of the trolley provided in a specific embodiment of this utility model;

[0048] Figure 3 This is a diagram showing the first folding process of the trolley provided in a specific embodiment of this utility model;

[0049] Figure 4 This is a diagram showing the second folding process of the trolley provided in a specific embodiment of this utility model;

[0050] Figure 5 This is a schematic diagram showing the connection between the first joint head and the second joint head of the trolley provided in a specific embodiment of this utility model;

[0051] Figure 6 This is an exploded view of the rotating joint of the trolley provided in a specific embodiment of this utility model;

[0052] Figure 7 This is a cross-sectional view of the rotating joint of the trolley provided in a specific embodiment of this utility model;

[0053] Figure 8 This is a schematic diagram of the structure of the first joint head provided in a specific embodiment of the present invention;

[0054] Figure 9 This is a schematic diagram of the structure of the second joint head provided in a specific embodiment of this utility model.

[0055] In the picture:

[0056] 1. Support base frame; 2. Push rod assembly; 3. Bearing frame; 4. Operating unit; 5. Traction cable; 6. Fasteners; 7. Connecting shaft; 8. Connecting parts;

[0057] 10. First locking element; 20. Second locking element; 30. First unlocking element; 301. Second mating part; 40. Second unlocking element; 50. Elastic reset element;

[0058] 11. Front bracket; 12. Rear bracket;

[0059] 111. Fourth articular head; 121. Third articular head;

[0060] 1110, Second shaft hole; 1111, Fourth locking groove;

[0061] 1210, First shaft hole; 1211, Second locking groove; 1212, Third locking groove;

[0062] 21. Upper push rod; 22. Lower push rod;

[0063] 221. First joint head; 2210. First connecting hole;

[0064] 2211. First insertion part; 2212. First mating part; 2213. First locking groove; 2214. Connecting pipe;

[0065] 22111, Limiting groove; 22112, Insertion cavity;

[0066] 31. Enclosure; 32. Handrail;

[0067] 311. Second joint head; 312. Connector seat;

[0068] 3111, Second insertion part; 3112, Connecting part; 3113, Supporting part; 3114, Connector;

[0069] 31111, Limiting protrusion; 31112, Connector;

[0070] 31121, Second connecting hole;

[0071] 100, First axis; 200, Second axis. Detailed Implementation

[0072] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0073] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Specifically, the terms "first position" and "second position" refer to two different positions.

[0074] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0075] like Figures 1 to 9 As shown, this embodiment provides a trolley that reduces the number of steps required to fold the trolley, improves the convenience of folding, and enhances the user experience. The trolley includes a support base frame 1, a push rod assembly 2, and a support frame 3.

[0076] Among them, see Figure 1 , Figure 2 , Figure 3 and Figure 4 One end of the push rod assembly 2 is rotatably connected to the support base 1 about the first axis 100, and the push rod assembly 2 can rotate to approach the support base 1. The carrier frame 3 is rotatably connected to the support base 1 about the first axis 100 and is connected to the push rod assembly 2. When the push rod assembly 2 is driven to rotate and approach the support base 1, the push rod assembly 2 can drive the carrier frame 3 to synchronously approach the support base 1.

[0077] The trolley provided in this embodiment has a push rod assembly 2 and a support frame 3 that are rotatably connected to the support base 1 around the same axis (first axis 100), and the push rod assembly 2 is fixedly connected to the support frame 3. This allows the push rod assembly 2 to move the support frame 3 towards the support base 1 when the push rod assembly 2 is rotated to fold. In other words, when folding the trolley, the push rod assembly 2 and the support frame 3 rotate and move towards the support base 1 simultaneously. Figure 2The arrow in the diagram indicates the direction of rotation and folding. Since there is no need to fold the push rod assembly 2 and the support frame 3 separately, the number of operation steps when folding the trolley is reduced, which facilitates the quick folding of the trolley and improves the ease of operation of folding the trolley. This meets the user's needs for convenience and efficiency and enhances the user experience.

[0078] See Figure 5 and Figure 6 and combined Figure 1 and Figure 3 The push rod assembly 2 is provided with a first joint head 221, and the support frame 3 is provided with a second joint head 311. The first joint head 221 and the second joint head 311 are fixedly connected and coaxially rotatably connected to the support base frame 1. During the folding of the trolley, when the push rod assembly 2 is driven to rotate and approach the support base frame 1, the first joint head 221 rotates relative to the support base frame 1 around the first axis 100. Since the first joint head 221 and the second joint head 311 are fixedly connected, the rotation of the first joint head 221 will drive the second joint head 311 to rotate around the first axis 100, thereby realizing that the push rod assembly 2 drives the support frame 3 to rotate and approach the support base frame 1 simultaneously.

[0079] Optionally, the first joint head 221 or the second joint head 311 is provided with a connecting part 3112, and the first joint head 221 and the second joint head 311 are fixedly connected through the connecting part 3112, so that the first joint head 221 and the second joint head 311 can rotate synchronously relative to the support base 1.

[0080] Furthermore, the first joint head 221 and the second joint head 311 are detachably fixedly connected by the connecting part 3112, and the first joint head 221 and the second joint head 311 are designed to be detachable, which facilitates the assembly and disassembly of the trolley.

[0081] See Figure 3 and Figure 5 The trolley has two symmetrically arranged sets of first joint heads 221 and second joint heads 311, with the two sets of second joint heads 311 positioned between the two sets of first joint heads 221. The trolley also includes a connecting shaft 7, with each end of the connecting shaft 7 correspondingly connected to one of the two sets of second joint heads 311. The connecting shaft 7 secures the two sets of second joint heads 311 together, enabling synchronous rotation of the left and right joints and improving the overall stability of the trolley.

[0082] In this embodiment, see Figure 5 , Figure 6 and Figure 7The second joint head 311 is provided with the aforementioned connecting portion 3112, which is set at an angle to the second insertion portion 3111. This arrangement allows part of the force exerted by the fixed support frame 3 to be distributed to the second insertion portion 3111 and the connecting portion 3112, thereby improving the strength of the joint.

[0083] Optionally, the push rod assembly 2 includes a push rod (lower push rod 22), and the first joint head 221 includes a connecting tube 2214 connected to the push rod (lower push rod 22). The connecting portion 3112 is detachably fixedly connected to the connecting tube 2214 or the push rod (lower push rod 22) to facilitate the assembly and disassembly of the trolley. The connecting portion 3112 is at least partially in the same direction of extension as the connecting tube 2214 or the push rod (lower push rod 22).

[0084] In this embodiment, the connecting part 3112 is connected and fixed to the first joint head 221 by a fastener 6. Specifically, the connecting part 3112 includes a first part and a second part arranged at an angle. The first part is connected to the second joint head 311, and the extension direction of the second part is consistent with the extension direction of the connecting tube 2214, and it can fit snugly with the connecting tube 2214. The fastener 6 passes through and connects to the connecting tube 2214 and the second part. Designing the connecting part 3112 so that the second part fits snugly with the connecting tube 2214 of the first joint head 221 can ensure a stable connection between the first joint head 221 and the second joint head 311, and ensure that the second joint head 311 can rotate synchronously with the first joint head 221, thereby improving the synchronicity of the rotation and folding of the support frame 3 and the push rod assembly 2.

[0085] For example, the connecting part 3112 is integrally formed with the second joint head 311, resulting in stronger structural stability. The fastener 6 can be a rivet, screw, bolt, etc., such as... Figure 8 and Figure 9 As shown, the first joint head 221 has a first connecting hole 2210 on the connecting tube 2214, and the second part of the connecting part 3112 has a second connecting hole 31121. The fastener 6 passes through and connects to the first connecting hole 2210 and the second connecting hole 31121 to fix the first joint head 221 and the second joint head 311 in place.

[0086] In other embodiments, a connecting portion 3112 may be provided on the first joint head 221, or the connecting portion 3112 may be formed separately and then fixedly connected to the first joint head 221 and the second joint head 311 respectively.

[0087] Optionally, see Figure 5 , Figure 6 and Figure 7The first joint head 221 is provided with a first insertion portion 2211 protruding toward the second joint head 311, and the second joint head 311 is provided with a second insertion portion 3111 protruding toward the first joint head 221. The first insertion portion 2211 and the second insertion portion 3111 are inserted into each other along the first axis 100 and are circumferentially limited. The cooperation between the first insertion portion 2211 and the second insertion portion 3111 restricts the second joint head 311 and the first joint head 221 from rotating relative to each other, thereby ensuring that the second joint head 311 and the first joint head 221 can only rotate synchronously relative to the support frame 1 around the first axis 100, improving the synchronicity of the rotation and folding of the support frame 3 and the push rod assembly 2.

[0088] See Figure 7 , Figure 8 and Figure 9 The first insertion part 2211 has an insertion cavity 22112 at its end, and the second insertion part 3111 has a connector 31112 at its end. The connector 31112 can be inserted into the insertion cavity 22112 to realize the insertion of the first insertion part 2211 and the second insertion part 3111. Further, one of the first insertion part 2211 and the second insertion part 3111 is provided with a limiting protrusion 31111, and the other is provided with a limiting groove 22111. The limiting protrusion 31111 engages with the limiting groove 22111 to circumferentially limit the first insertion part 2211 and the second insertion part 3111, restricting the relative rotation of the first joint head 221 and the second joint head 311.

[0089] Specifically, in this embodiment Figure 8 and Figure 9 In the first plug-in part 2211, a plurality of limiting grooves 22111 are provided circumferentially spaced inside the plug cavity 22112. A plurality of limiting protrusions 31111 are provided circumferentially spaced on the plug connector 31112 of the second plug-in part 3111. After the plug connector 31112 is inserted into the plug cavity 22112, the plurality of limiting protrusions 31111 and the plurality of limiting grooves 22111 are engaged one-to-one, thereby realizing the circumferential limiting of the first plug-in part 2211 and the second plug-in part 3111.

[0090] In other embodiments, the cross-section of the insertion cavity 22112 of the first insertion part 2211 and the cross-section of the insertion connector 31112 of the second insertion part 3111 can both be designed as non-circular, which can also achieve circumferential positioning of the first insertion part 2211 and the second insertion part 3111.

[0091] See Figure 1 , Figure 3 and Figure 4The support frame 3 includes a support section, on which a connector seat 312 is provided, and on the second joint head 311 a support section 3113 is provided, the support section 3113 being connected to the connector seat 312. When the push rod assembly 2 rotates and retracts, the first joint head 221 drives the second joint head 311 to rotate synchronously, and then the support section 3113 drives the support section to rotate synchronously with the second joint head 311, thus realizing that the entire support frame 3 rotates synchronously with the push rod assembly 2.

[0092] Optionally, the support 3113 is detachably connected to the connector 312. For example, the connector 312 has a slot, and one end of the support 3113 away from the second joint head 311 is inserted into the slot, facilitating the assembly and disassembly of the support. Exemplarily, the support includes a frame 31 and a seat pocket (not shown) disposed on the frame 31, the seat pocket providing a base for a child to sit on. See also... Figure 1 The frame 31 is equipped with a handrail 32, which provides additional support for children and prevents them from tilting forward or tipping over. This is especially beneficial when the stroller is moving or turning, effectively enhancing its stability and safety. In other embodiments, the support unit can also be a bassinet, etc.

[0093] For example, the support portion 3113 is integrally formed with the second joint head 311, which is convenient to process and can improve the support stability of the support portion 3113.

[0094] See Figure 1 , Figure 3 , Figure 4 and Figure 6 The support frame 1 includes a front support 11 and a rear support 12 rotatably connected around a first axis 100. The rear support 12 is provided with a third joint head 121, and the front support 11 is provided with a fourth joint head 111. The third joint head 121 and the fourth joint head 111 are coaxially arranged between the first joint head 221 and the second joint head 311. That is, the first joint head 221, the third joint head 121, the fourth joint head 111, and the second joint head 311 are arranged coaxially in sequence, so that the push rod assembly 2 and the support frame 3 are rotatably connected to the support frame 1 around the same axis (the first axis 100). When the push rod assembly 2 rotates and folds, the first joint head 221 drives the second joint head 311 to rotate synchronously relative to the third joint head 121 and the fourth joint head 111. When the front support 11 moves closer to the rear support 12, the third joint head 121 and the fourth joint head 111 rotate relative to each other.

[0095] Optionally, see Figure 5 , Figure 6 and Figure 7The first joint head 221 is provided with a first insertion part 2211, and the second joint head 311 is provided with a second insertion part 3111. The first insertion part 2211 and the second insertion part 3111 are inserted into each other along the first axis 100 to form a mounting shaft. The third joint head 121 and the fourth joint head 111 are rotatably mounted on the mounting shaft so as to realize that the front support 11 and the rear support 12 of the support base 1 rotate relative to each other and move closer.

[0096] Optionally, the outer periphery of the first insertion portion 2211 and / or the second insertion portion 3111 is at least partially arc-shaped to ensure that the third joint head 121 and the fourth joint head 111 can rotate smoothly relative to the first joint head 221 and the second joint head 311.

[0097] In this embodiment, as Figure 6 and Figure 7 As shown, the third joint head 121 is provided with a first shaft hole 1210, and the fourth joint head 111 is provided with a second shaft hole 1110. The first insertion part 2211 of the first joint head 221 and the second insertion part 3111 of the second joint head 311 are inserted to form a mounting shaft. The third joint head 121 is rotatably sleeved on the mounting shaft through the first shaft hole 1210, and the fourth joint head 111 is rotatably sleeved on the mounting shaft through the second shaft hole 1110, so that both the third joint head 121 and the fourth joint head 111 can rotate relative to the first joint head 221 and the second joint head 311.

[0098] See Figure 5 , Figure 6 and Figure 7 The first joint head 221, the second joint head 311, the third joint head 121 and the fourth joint head 111 are each provided in two sets, and the two sets of structures are arranged symmetrically. The two second joint heads 311 are each provided with a connecting head 3114 protruding on one side facing each other. The two connecting heads 3114 are connected and fixed by a connecting shaft 7 to enhance the overall structural stability of the trolley.

[0099] Furthermore, the first joint head 221 and the second joint head 311 are connected by a connector 8, so that the first insertion part 2211 and the second insertion part 3111 can be fixed together. Specifically, both the first insertion part 2211 and the second insertion part 3111 have through holes along the first axis 100. The connector head 3114 is provided with a cavity communicating with the through hole. One end of the connecting shaft 7 extends into the cavity, and the end of the shaft extending into the cavity is provided with a threaded hole. The connector 8 passes through the through hole of the first insertion part 2211 and the through hole of the second insertion part 3111 in sequence, and is threadedly connected to the connecting shaft 7 through the threaded hole. For example, the connector 8 can be a long screw.

[0100] Optionally, see Figure 6 and Figure 7A first locking member 10, movable along the first axis 100, is provided between the first joint head 221 and the third joint head 121. The first locking member 10 is used to lock the first joint head 221 and the third joint head 121 to restrict relative rotation between them. When the trolley is in the unfolded state, the first locking member 10 is in the position of locking the first joint head 221 and the third joint head 121, ensuring that the push rod assembly 2 is stably maintained in the unfolded state.

[0101] Continue reading Figure 6 and Figure 7 A second locking member 20, movable along the first axis 100, is provided between the third joint head 121 and the fourth joint head 111. The second locking member 20 is used to lock the third joint head 121 and the fourth joint head 111 to restrict relative rotation between them. When the trolley is in the unfolded state, the second locking member 20 is in the position of locking the third joint head 121 and the fourth joint head 111, ensuring that the front support 11 and the rear support 12 of the support base 1 are stably maintained in the unfolded state.

[0102] Optionally, a first unlocking member 30 is provided between the first joint head 221 and the first locking member 10. The first unlocking member 30 is rotatable around the first axis 100 and can move along the first axis 100. A first engaging part 2212 is provided on the first joint head 221, and a second engaging part 301 is provided on the first unlocking member 30. When the first unlocking member 30 rotates, the first engaging part 2212 engages with the second engaging part 301 to drive the first locking member 10 to move toward the position of unlocking the first joint head 221 and the third joint head 121. Specifically, while driving the first unlocking member 30 to rotate around the first axis 100, the first unlocking member 30 moves linearly along the first axis 100 under the interaction of the first engaging part 2212 and the second engaging part 301, thereby pushing the first locking member 10 to move linearly along the first axis 100 simultaneously, so that the first locking member 10 disengages from the first joint head 221, and the rotation limit between the first joint head 221 and the third joint head 121 is released. At this time, the retractable push rod assembly 2 can be rotated.

[0103] In this embodiment, see Figure 6 and Figure 8The first mating part 2212 is a guide protrusion disposed on the first joint head 221, and the second mating part 301 is a guide groove disposed on the first unlocking member 30. The guide protrusion is inserted into the guide groove, the groove wall of which includes a first guide inclined surface, and the guide protrusion has a second guide inclined surface. The first guide inclined surface and the second guide inclined surface are in sliding engagement. During the rotation of the first unlocking member 30, the first guide inclined surface and the second guide inclined surface abut against each other and slide in engagement with each other as the first unlocking member 30 rotates. Under the mutual pushing action of the first guide inclined surface and the second guide inclined surface, the first unlocking member 30 is driven to move along the first axis 100, thereby improving the movement accuracy of the first unlocking member 30 and the first locking member 10 along the first axis 100.

[0104] In other embodiments, the first mating part 2212 may also be a guide groove provided in the first joint head 221, and the second mating part 301 may be a guide protrusion provided in the first unlocking member 30. As long as the first unlocking member 30 can be rotated, the first locking member 10 can be driven to move toward the position of unlocking the first joint head 221 and the third joint head 121.

[0105] For example, three guide protrusions are spaced circumferentially on the first joint head 221, and correspondingly, three guide grooves are provided on the first unlocking member 30. The three guide protrusions and the three guide grooves slide in a one-to-one correspondence, improving the movement stability of the first unlocking member 30. The number of the first mating part 2212 and the second mating part 301 can be adaptively increased or decreased according to actual needs, and is not limited to the number and distribution methods listed in this embodiment.

[0106] See Figure 2 and combined Figure 6 The push rod assembly 2 is equipped with an operating part 4 and a traction cable 5. The operating part 4 is connected to the first unlocking member 30 via the traction cable 5. When an external force is applied to the operating part 4, the traction cable 5 can drive the first unlocking member 30 to rotate around the first axis 100. When the trolley needs to be folded, an external force is applied to the operating part 4, causing the traction cable 5 to be pulled and tensioned. In turn, the traction cable 5 pulls the first unlocking member 30 to rotate around the first axis 100, causing the first unlocking member 30 to move along the first axis 100 and push against the first locking member 10 to move linearly in sync. This realizes that the operating part 4 is linked with the first unlocking member 30 through the traction cable 5 to unlock the first locking member 10, so that the push rod assembly 2 can be rotated and folded.

[0107] For example, the traction cable 5 can be a traction rope, such as a steel wire rope, which has a certain degree of flexibility and can adapt to deformation when the first unlocking member 30 rotates, so as to ensure that the first unlocking member 30 rotates smoothly.

[0108] See Figure 6 and Figure 7The first joint head 221 is provided with a first locking groove 2213, and the third joint head 121 is provided with a second locking groove 1211. When the first locking member 10 is engaged with both the first locking groove 2213 and the second locking groove 1211, the first joint head 221 and the third joint head 121 are locked. When the first locking member 10 disengages from the first locking groove 2213 and engages with the second locking groove 1211, the first joint head 221 and the third joint head 121 are unlocked. Specifically, the first locking member 10 is provided with a plurality of first teeth along the circumferential direction. The first locking groove 2213 includes a first slot corresponding to each of the plurality of first teeth. The second locking groove 1211 includes a second slot corresponding to each of the plurality of first teeth. When the first unlocking member 30 drives the first locking member 10 to move along the first axis 100 until the first teeth are completely disengaged from the first slots, the first joint head 221 and the third joint head 121 are unlocked. At this time, the first joint head 221 can rotate relative to the third joint head 121. When the first locking member 10 moves along the first axis 100 until the first tooth engages with both the first slot and the second slot, the first joint head 221 and the third joint head 121 are locked. At this time, the first joint head 221 cannot rotate relative to the third joint head 121.

[0109] In this embodiment, the first locking groove 2213 and the second locking groove 1211 face each other. The first unlocking member 30 and the first locking member 10 are both sleeved on the mounting shaft formed by the first insertion part 2211 and the second insertion part 3111. The first unlocking member 30 and the first locking member 10 move along the first axis 100 within the space enclosed by the first locking groove 2213 and the second locking groove 1211, ensuring that the first locking member 10 has enough space to switch between the locking and unlocking states.

[0110] See Figure 6 and Figure 7The third joint head 121 is provided with a third locking groove 1212, and the fourth joint head 111 is provided with a fourth locking groove 1111. When the second locking member 20 is engaged with both the third locking groove 1212 and the fourth locking groove 1111, the third joint head 121 and the fourth joint head 111 are locked. When the second locking member 20 disengages from the third locking groove 1212 and engages with the fourth locking groove 1111, the third joint head 121 and the fourth joint head 111 are unlocked. Specifically, the second locking member 20 is provided with a plurality of second teeth along the circumferential direction. The third locking groove 1212 includes a third slot corresponding to each of the plurality of second teeth, and the fourth locking groove 1111 includes a fourth slot corresponding to each of the plurality of second teeth. When the second locking member 20 moves along the first axis 100 until the second teeth are completely disengaged from the third slots, the third joint head 121 and the fourth joint head 111 are unlocked. At this time, the third joint head 121 can rotate relative to the fourth joint head 111, and the front bracket 11 and the rear bracket 12 can move closer to each other. When the second locking member 20 moves along the first axis 100 until the second tooth engages with both the third and fourth slots, the third joint head 121 and the fourth joint head 111 are locked, and at this time the third joint head 121 and the fourth joint head 111 cannot rotate relative to each other.

[0111] In this embodiment, the third locking groove 1212 and the fourth locking groove 1111 face each other, and the second locking member 20 is sleeved on the mounting shaft formed by the first insertion part 2211 and the second insertion part 3111. The second locking member 20 moves along the first axis 100 within the space formed by the third locking groove 1212 and the fourth locking groove 1111, ensuring that the second locking member 20 has enough space to switch between locking and unlocking states.

[0112] See Figure 6 and Figure 7 One of the first locking member 10 and the second locking member 20 is provided with a second unlocking member 40, and the second unlocking member 40 is located between the first locking member 10 and the second locking member 20. When the first unlocking member 30 drives the first locking member 10 to move toward the position of unlocking the first joint head 221 and the third joint head 121, the first locking member 10 drives the second locking member 20 to move toward the position of unlocking the third joint head 121 and the fourth joint head 111 through the second unlocking member 40. That is, while the first unlocking member 30 drives the first locking member 10 to unlock, the second unlocking member 40 drives the second locking member 20 to unlock, so that the first joint head 221 and the third joint head 121, as well as the third joint head 121 and the fourth joint head 111, are unlocked synchronously. Only one operation of the operating part 4 is needed to make the push rod assembly 2 rotate and fold. At the same time, the front bracket 11 and the rear bracket 12 can also rotate and fold relative to each other, further reducing the operation steps required for folding the trolley, making the trolley fold quickly, more convenient for users, and providing a better user experience.

[0113] Optionally, the second unlocking member 40 is a pushing protrusion protruding from the first locking member 10, with one end of the pushing protrusion away from the first locking member 10 abutting against the second locking member 20, as shown in the figure. Figure 6 In the orientation of the first locking member 10, when the first unlocking member 30 drives the first locking member 10 to move to the left, the pushing protrusion pushes the second locking member 20 to move to the left in sync, thereby unlocking the second locking member 20.

[0114] In other embodiments, the second unlocking member 40 may also be a pushing protrusion protruding from the second locking member 20, and the end of the pushing protrusion away from the second locking member 20 abuts against the first locking member 10, which can also achieve the unlocking of the second locking member 20 while the first locking member 10 moves to unlock.

[0115] See Figure 6 and Figure 7 An elastic reset member 50 is provided between the second locking member 20 and the fourth joint head 111. The second locking member 20 can move towards the position of locking the third joint head 121 and the fourth joint head 111 under the elastic force of the elastic reset member 50. When the second locking member 20 moves towards the position of locking the third joint head 121 and the fourth joint head 111, it can drive the first locking member 10 towards the position of locking the first joint head 221 and the third joint head 121 through the second unlocking member 40.

[0116] Specifically, during the process of the first unlocking member 30 driving the first locking member 10 and the second locking member 20 to move and unlock, the second locking member 20 compresses the elastic reset member 50 to deform and accumulate elastic potential energy. When the push rod assembly 2 rotates and unfolds, the traction cable 5 relaxes, and its force on the first unlocking member 30 disappears. The elastic reset member 50 releases its elastic potential energy, thereby driving the second locking member 20 to move toward the position of locking the third joint head 121 and the fourth joint head 111. At the same time, the second locking member 20 pushes the first locking member 10 toward the position of locking the first joint head 221 and the third joint head 121 through the second unlocking member 40. The elastic reset member 50 enables the second locking member 20 and the first locking member 10 to automatically reset and lock, ensuring that the first locking member 10 and the second locking member 20 can smoothly switch to the locked or unlocked state.

[0117] For example, the elastic reset member 50 is a spring, which is sleeved on the mounting shaft formed by the first insertion part 2211 and the second insertion part 3111, and is restricted between the second locking member 20 and the fourth joint head 111, so as to ensure that the elastic reset member 50 always extends and contracts stably in the direction of the first axis 100.

[0118] See Figure 1 and Figure 3The push rod assembly 2 includes an upper push rod 21 and a lower push rod 22 rotatably connected around a second axis 200. The upper push rod 21 and the lower push rod 22 can be unfolded and folded relative to each other. When folding the trolley, the upper push rod 21 is first rotated and folded relative to the lower push rod 22, and then the traction cable 5 is pulled by the operating part 4. The traction cable 5 drives the first unlocking member 30 to drive the first locking member 10 to unlock, so that the lower push rod 22 can rotate and fold relative to the supporting base frame 1. When the upper push rod 21 and the lower push rod 22 unfold relative to each other, the first joint head 221 drives the second joint head 311 to rotate and unfold synchronously relative to the supporting base frame 1. At the same time, under the action of the elastic reset member 50, the first locking member 10 and the second locking member 20 both move towards the locked state. The third joint head 121 and the fourth joint head 111 rotate and unfold relative to each other. When the trolley is unfolded into place, the first locking member 10 locks the first joint head 221 and the third joint head 121, and the second locking member 20 locks the third joint head 121 and the fourth joint head 111, so that the trolley is stably maintained in the unfolded state.

[0119] The folding process of the cart provided in this embodiment is as follows:

[0120] like Figure 1 , Figure 2 and Figure 3 As shown, when folding the trolley, first rotate the folding push rod 21, then pull the traction cable 5 through the operating part 4. This causes the traction cable 5 to rotate the first unlocking member 30. Under the action of the first mating part 2212 and the second mating part 301, the first unlocking member 30 pushes the first locking member 10 out of the first locking groove 2213 of the first joint head 221, thus unlocking the first joint head 221 from the third joint head 121. During this process, the first locking member 10 drives the second locking member 20 out of the third locking groove 1212 of the third joint head 121 through the second unlocking member 40, thus unlocking the third joint head 121 from the fourth joint head 111.

[0121] Then, rotate the folding push rod 22 to bring the push rod assembly 2 closer to the support base 1. During this process, the first joint head 221 drives the second joint head 311 to rotate synchronously, so that the support frame 3 and the push rod assembly 2 move towards the support base 1 simultaneously. At the same time, the front support 11 moves towards the rear support 12, completing the folding of the trolley. Figure 4 As shown.

[0122] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A trolley, characterized in that, include: Support frame; A push rod assembly, one end of which is rotatably connected to the support base about a first axis, and the push rod assembly is rotatable to approach the support base; The support frame is rotatably connected to the support base frame about the first axis and is connected to the push rod assembly; When the push rod assembly is driven to rotate and move closer to the support base, the push rod assembly can drive the bearing frame to move closer to the support base synchronously.

2. The trolley according to claim 1, characterized in that, The push rod assembly is provided with a first joint head, and the support frame is provided with a second joint head. The first joint head and the second joint head are fixedly connected, and the first joint head and the second joint head are coaxially rotatably connected to the support base frame.

3. The trolley according to claim 2, characterized in that, The first joint head is provided with a first insertion part, and the second joint head is provided with a second insertion part. The first insertion part and the second insertion part are inserted into each other along the first axis direction and are limited and fitted in the circumferential direction. And / or, The first joint head or the second joint head is provided with a connecting part, and the first joint head and the second joint head are connected through the connecting part; And / or, Both the first joint head and the second joint head have two sets symmetrically arranged, with the two sets of second joint heads positioned between the two sets of first joint heads; The trolley also includes a connecting shaft, the two ends of which are respectively connected to two sets of the second joint heads; And / or, The support frame includes a support part, on which a connector seat is provided, and a support part is provided on the second joint head, the support part being connected to the connector seat.

4. The trolley according to claim 3, characterized in that, The first joint head is provided with a first insertion part, and the second joint head is provided with a second insertion part and a connecting part; One of the first and second insertion portions is provided with a limiting protrusion, and the other is provided with a limiting groove. The limiting protrusion engages with the limiting groove to circumferentially limit the first and second insertion portions; and / or, The connecting portion is arranged at an angle to the second insertion portion; and / or The push rod assembly includes a push rod, and the first joint head includes a connecting tube connected to the push rod, and the connecting part is detachably fixedly connected to the connecting tube or the push rod; The connecting portion is at least partially in the same direction of extension as the connecting tube or the push rod.

5. The trolley according to claim 2, characterized in that, The supporting frame includes a front bracket and a rear bracket rotatably connected around the first axis. The rear bracket is provided with a third joint head, and the front bracket is provided with a fourth joint head. The third joint head and the fourth joint head are coaxially disposed between the first joint head and the second joint head.

6. The trolley according to claim 5, characterized in that, The first joint head is provided with a first insertion part, the second joint head is provided with a second insertion part, the first insertion part and the second insertion part are inserted into each other along the first axis to form a mounting shaft, and the third joint head and the fourth joint head are rotatably disposed on the mounting shaft; The outer periphery of the first plug portion and / or the second plug portion is at least partially arc-shaped.

7. The trolley according to claim 5, characterized in that, A first locking member is provided between the first joint head and the third joint head, which is movable along the first axis. The first locking member is used to lock the first joint head and the third joint head to restrict the relative rotation of the first joint head and the third joint head. A second locking member is provided between the third joint head and the fourth joint head, which is movable along the first axis. The second locking member is used to lock the third joint head and the fourth joint head to restrict the relative rotation of the third joint head and the fourth joint head.

8. The trolley according to claim 7, characterized in that, A first unlocking member is provided between the first joint head and the first locking member. The first unlocking member is capable of rotating around the first axis and moving along the first axis. The first joint head is provided with a first mating part, and the first unlocking member is provided with a second mating part. When the first unlocking member rotates, the first mating part and the second mating part cooperate to drive the first locking member to move toward the position of unlocking the first joint head and the third joint head.

9. The trolley according to claim 8, characterized in that, One of the first locking member and the second locking member is provided with a second unlocking member, and the second unlocking member is located between the first locking member and the second locking member. When the first unlocking member drives the first locking member to move toward the position of unlocking the first joint head and the third joint head, the first locking member drives the second locking member to move toward the position of unlocking the third joint head and the fourth joint head through the second unlocking member. And / or, the push rod assembly is provided with an operating part and a traction cable. The operating part is connected to the first unlocking member through the traction cable. When an external force is applied to the operating part, the traction cable can drive the first unlocking member to rotate around the first axis.

10. The trolley according to claim 9, characterized in that, An elastic reset member is provided between the second locking member and the fourth joint head, and the second locking member can move toward the position of locking the third joint head and the fourth joint head under the elastic force of the elastic reset member; When one of the first locking member and the second locking member is provided with a second unlocking member, when the second locking member moves toward the position of locking the third joint head and the fourth joint head, the first locking member can be driven to move toward the position of locking the first joint head and the third joint head by the second unlocking member; And / or, The first joint head is provided with a first locking groove, and the third joint head is provided with a second locking groove. When the first locking member is engaged with both the first locking groove and the second locking groove, the first joint head is locked with the third joint head. When the first locking member disengages from the first locking groove and engages with the second locking groove, the first joint head is unlocked with the third joint head. And / or, The third joint head is provided with a third locking groove, and the fourth joint head is provided with a fourth locking groove. When the second locking member is engaged with both the third locking groove and the fourth locking groove, the third joint head and the fourth joint head are locked. When the second locking member disengages from the third locking groove and engages with the fourth locking groove, the third joint head and the fourth joint head are unlocked.

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