Cart

Abstract

The utility model belongs to the field of children products, and discloses a cart. Comprising a first strut, a second strut, a connecting rod structure and a push rod, the middle part of the first support rod is rotatably connected with the middle part of the second support rod, so that the second support rod and the first support rod are crossed, and the first support rod and the second support rod are correspondingly provided with a first rod section and a second rod section on the same side of the crossed point; the connecting rod mechanism comprises a connecting rod and a mounting bracket, one ends of the connecting rod and the mounting bracket are rotationally connected, the other end of the connecting rod is rotationally connected to the first rod section, and the other end of the mounting bracket is connected to the second rod section; the push rod is movably and adjustably installed on the installation support in the length direction of the push rod. According to the foldable stroller, a four-connecting-rod structure is formed through the installation support, the connecting rod, the first rod section and the second rod section, and switching of unfolding and folding of the stroller is achieved through movement and limiting of the four-connecting-rod structure.

Description

Technical Field

[0001] The utility model relates to the technical field of children's products, in particular to a stroller. Background Art

[0002] At present, as an outdoor activity tool for infants, the stroller provides great convenience for parents. In the existing baby strollers, the stroller can be unfolded and folded for use and storage. There are various types of existing baby strollers, among which the connection methods, folding principles, and operating methods of the frames are different.

[0003] Among them, due to reasons such as the strength and stability of the stroller, the folding structure of general strollers is relatively complex, requiring a large number of movable parts and locking parts, which results in an increase in the overall weight and complex operations when unfolding or folding. The learning cost for users when first contacting is relatively high, so it is not conducive to user use. In summary, the existing operating method for folding and unfolding the stroller is relatively complex. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a stroller, aiming to solve the problem of complex folding and unfolding operations of the existing stroller.

[0005] To achieve the above purpose, the utility model provides a stroller, including:

[0006] A first strut and a second strut, the middle parts of the first strut and the second strut are rotatably connected so that the second strut and the first strut are arranged in a cross shape, and the first strut and the second strut respectively have a first rod segment and a second rod segment on the same side of their intersection point;

[0007] A link mechanism, including a connecting rod and a mounting bracket whose one ends are rotatably connected to each other, the other end of the connecting rod is rotatably connected to the first rod segment, and the other end of the mounting bracket is connected to the second rod segment;

[0008] A push rod, which is movably adjustable along its length direction and is mounted on the mounting bracket.

[0009] Optionally, the stroller further includes a first limiting structure disposed between the mounting bracket and the first strut or the first rod segment, the first limiting structure has a limiting state and a limit-release state. In the limiting state, the mounting bracket and the first rod segment are limited, and in the limit-release state, the restriction of the first rod segment on the mounting bracket is released.

[0010] Optionally, the first limiting structure includes a limiting portion provided on the mounting bracket and a cooperating portion provided on the first rod segment. The limiting portion moves towards the cooperating portion so that the limiting portion and the cooperating portion are limited and fixed, and the first limiting structure is in the limiting state; and / or,

[0011] The push rod is provided with an unlocking portion for driving the first limiting structure to release the limit.

[0012] Optionally, one end of the mounting bracket facing the first rod forms a limiting card slot, a limiting protrusion is provided on the first rod, the limiting protrusion is arranged corresponding to the limiting card slot, and the limiting protrusion is snap-fitted into the limiting card slot so that the first limiting structure is in the limiting state. Among them, the limiting portion includes the limiting card slot, and the cooperating portion includes the limiting protrusion; and / or,

[0013] One end of the mounting bracket facing the first rod segment is movably provided with a movable member, and the limiting portion is arranged on the movable member.

[0014] Optionally, the mounting bracket includes a bracket body and a rotating member. One end of the rotating member is rotatably mounted on the bracket body, and a limiting card slot is formed between the other end and the bracket body;

[0015] When the unlocking portion drives the rotating member to rotate away from the bracket body, the limiting protrusion can be disengaged from the limiting card slot.

[0016] Optionally, two first rod segments are provided, and the two first rod segments are arranged at intervals;

[0017] Two second rod segments are provided, and the two second rod segments are arranged at intervals;

[0018] The mounting bracket is rotatably connected to the second rod segment of at least one second rod, and the connecting rod is rotatably connected to the first rod segment of at least one first rod.

[0019] Optionally, a connecting cross bar is arranged between the second rod ends of the two second rod segments, a rotating mounting portion is arranged outside the connecting cross bar, one end of the mounting bracket is provided with a mounting sleeve, and the mounting sleeve is rotatably sleeved with the rotating mounting portion; and / or,

[0020] Two connecting rods are provided, and one ends of the two connecting rods are both rotatably connected to the mounting bracket, and the other ends are respectively rotatably connected to the two first rod segments; and / or,

[0021] A rod connecting rod is arranged between the two first rod segments.

[0022] Optionally, the trolley has a deployed state and a folded state, and one end of the connecting rod connected to the mounting bracket is a hinged end;

[0023] The connecting rod has a first position where it rotates to make the hinged end fit on the first rod segment, and a second position where it rotates to keep the hinged end away from the first rod segment. In the deployed state, the connecting rod is in the first position, and in the folded state, the connecting rod is in the second position.

[0024] Optionally, the trolley has a deployed state and a folded state;

[0025] The trolley further includes a second limiting structure disposed between the push rod and the mounting bracket. When the trolley is in the deployed state, the second limiting structure limits the push rod and the mounting bracket; and / or,

[0026] A third limiting structure is further formed between the push rod and the mounting bracket. When the trolley is in the folded state, the third limiting structure limits the mounting bracket and the push rod;

[0027] The third limiting structure includes a limiting claw disposed on the push rod, and a clamping space for clamping the mounting bracket is formed between the limiting claw and the outer side wall of the push rod.

[0028] Optionally, the mounting bracket includes a first mounting segment and a second mounting segment that are connected at one end and are arranged at an angle; the connecting rod is rotatably connected to the first mounting segment, and the second mounting segment is rotatably connected to the second rod segment; and / or,

[0029] The push rod is telescopically arranged; and / or,

[0030] A sliding hole is formed on the mounting bracket, and the push rod slidably passes through the sliding hole; and / or,

[0031] The trolley further includes a seat assembly disposed on the first support rod.

[0032] The present utility model provides a trolley. The middle parts of the first support rod and the second support rod are hinged. The link mechanism includes a connecting rod and a mounting bracket, so that a four-bar linkage structure is jointly formed among the first support rod, the second support rod, the connecting rod and the mounting bracket. A push rod is arranged on the mounting bracket, and the push rod can be adjusted along its length direction. When the trolley needs to be kept unfolded, the formed four-bar linkage structure is activated, so that the first support rod, the second support rod, the connecting rod and the mounting bracket move away from each other and unfold, so that components such as seats can be carried on the first support rod and the second support rod for the convenience of users. At the same time, the push rod is moved along its length direction, so that all components move away from each other, facilitating the user to drive the four-bar linkage structure to move through the push rod. When the trolley needs to be folded, the formed four-bar linkage structure is activated, and the first support rod, the second support rod, the connecting rod and the mounting bracket rotate and approach each other, completing the movable fitting between the rods. And the position between the push rod and the mounting bracket can be adjusted by moving the push rod, so as to facilitate the folding of the trolley. The folding and unfolding are realized by means of a four-bar linkage, and the method is simple and reliable and convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic perspective view of an embodiment of the trolley provided by the present utility model;

[0034] Figure 2 is Figure 1 an enlarged connection structure schematic diagram of the first support rod, the second support rod, the connecting rod and the mounting bracket in

[0035] Figure 3 is Figure 2 an enlarged structure schematic diagram of part A in

[0036] Figure 4 is Figure 3 an enlarged split structure schematic diagram of the mounting bracket in

[0037] Figure 5 is Figure 1 an enlarged partial structure schematic diagram of the end of the push rod in

[0038] Figure 6 is Figure 1 an enlarged partial structure schematic diagram of the trolley in

[0039] Figure 7 is Figure 6 an enlarged structure schematic diagram of part B in

[0040] Figure 8 is Figure 1 an enlarged structure schematic diagram of the mounting bracket in

[0041] Figure 9 is Figure 1 a schematic plan view of the trolley in

[0042] Figure 10 is Figure 1 a schematic plan view of the trolley in the folded state;

[0043] Figure 11 is Figure 10 a schematic three - dimensional view of the trolley.

[0044] Explanation of the reference numerals in the drawings:

[0045] 100, trolley; 11, first strut; 11a, first rod segment; 111, mating part; 111a, limiting projection; 12, second strut; 12a, second rod segment; 121, connecting part; 122, rotating mounting part; 21, connecting rod; 22, mounting bracket; 22a, first mounting segment; 22b, second mounting segment; 221, limiting part; 221a, limiting groove; 222, hook; 2211, bracket body; 2212, rotating part; 3, push rod; 31, telescopic sleeve; 311, driving block; 312, locking tongue; 32, telescopic rod; 321, hand - held part; 41, limiting claw.

[0046] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed embodiments

[0047] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0048] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0049] In addition, if descriptions such as "first" and "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0050] Currently, as an outdoor activity tool for infants, strollers provide great convenience for parents. In existing baby strollers, the stroller can be unfolded and folded for use and storage. There are a variety of existing baby strollers, among which the connection methods, folding principles, and operating methods of the frames are different.

[0051] Among them, due to reasons such as the strength and stability of the stroller, the folding structure of general strollers is relatively complex, requiring a large number of movable parts and locking parts. This leads to an increase in the overall weight, and the operation is complex when unfolding or folding is required, and the learning cost for users when first contacting is relatively high. Therefore, it is not conducive to user use. In summary, the operation method of folding and unfolding of existing strollers is relatively complex.

[0052] Please refer to Figures 1 to 2 , the present utility model provides a stroller 100, including a first support rod 11, a second support rod 12, a link mechanism, and a push rod 3; the middle parts of the first support rod 11 and the second support rod 12 are rotatably connected so that the second support rod 12 and the first support rod 11 are arranged in a cross shape. The first support rod 11 and the second support rod 12 respectively have a first rod section 11a and a second rod section 12a on the same side of their intersection point; the link mechanism includes a connecting rod 21 and a mounting bracket 22 whose one ends are rotatably connected to each other. The other end of the connecting rod 21 is rotatably connected to the first rod section 11a, and the other end of the mounting bracket 22 is connected to the second rod section 12a; the push rod is movably adjustable along its length direction and is mounted on the mounting bracket.

[0053] In a trolley 100 provided by the present utility model, the middle parts of the first support rod 11 and the second support rod 12 are hinged. The link mechanism includes a connecting rod 21 and a mounting bracket 22, so that a four-bar linkage structure is jointly formed among the first support rod 11, the second support rod 12, the connecting rod 21 and the mounting bracket 22. A push rod 3 is arranged on the mounting bracket 22, and the push rod 3 can be adjusted along its length direction. When the trolley 100 needs to be kept unfolded, the formed four-bar linkage structure is activated, so that the first support rod 11, the second support rod 12, the connecting rod 21 and the mounting bracket 22 are unfolded away from each other, so that components such as seats can be carried on the first support rod 11 and the second support rod 12 for the convenience of users. At the same time, the push rod 3 is moved along its length direction, so that all components are unfolded away from each other, facilitating the user to drive the four-bar linkage structure to move through the push rod 3. When the trolley 100 needs to be folded, the formed four-bar linkage structure is activated, and the first support rod 11, the second support rod 12, the connecting rod 21 and the mounting bracket 22 rotate and approach each other to complete the active fitting between the rods. And the position between the push rod 3 and the mounting bracket 22 can be adjusted by moving the push rod 3 to facilitate the folding of the trolley 100. The folding and unfolding are realized in the way of a four-bar linkage, with a simple and reliable method and convenient to use.

[0054] Further, the trolley 100 further includes a first limiting structure provided between the mounting bracket 22 and the first support rod 11. The first limiting structure has a limiting state and a limit-release state. In the limiting state, the mounting bracket and the first support rod are limited. In the limit-release state, the restriction of the support rod on the mounting bracket is released. At the same time, it is convenient to unlock the first limiting structure during the folding process of the push rod, with convenient and fast operation. In other embodiments, the first limiting structure can also be arranged between the mounting bracket 22 and the first rod segment 11a, or at other rotational position connection points in the four-bar linkage structure, and the trolley can also be locked.

[0055] In the trolley 100 provided by the present utility model, the middle parts of the first support rod 11 and the second support rod 12 are hinged. The connecting mechanism includes a connecting rod 21 and a mounting bracket 22, such that a four-bar linkage structure is jointly formed among the first support rod 11, the second support rod 12, the connecting rod 21, and the mounting bracket 22. When the trolley 100 needs to be kept unfolded, the mounting bracket 22 is limited and fixed on the first rod segment 11a through the first limiting structure, such that the mounting bracket 22 can be regarded as an integral part with the first support rod 11, resulting in the inability of the connecting rod 21 to move, and further causing the second support rod 12 to be unable to move. The degrees of freedom of each rod of the four-bar linkage structure are zero, such that mutual rotation cannot occur among the first support rod 11, the second support rod 12, the connecting rod 21, and the mounting bracket 22. Furthermore, the structural stability of the formed four-bar linkage structure can be maintained, and the stable unfolding of the trolley 100 can be maintained, avoiding structural deformation caused by the movement of each rod. When the trolley 100 needs to be folded, the limiting state is released, and a hinged four-bar linkage structure is formed among the first support rod 11, the second support rod 12, the connecting rod 21, and the mounting bracket 22. Mutual rotation can occur among multiple rods, and further, the active fitting between the rods is completed, realizing the folding of the trolley 100. The folding and unfolding methods are simple and reliable, and the movement mode is stable. At the same time, only by fixing or releasing the fixation between the mounting bracket 22 and the first rod segment 11a can the switching between unfolding and folding be realized, and the operation is simple and reliable, facilitating use.

[0056] In this embodiment, the middle part of the first support rod 11 and the middle part of the second support rod 12 are rotationally connected, and there are various rotational connection methods. In this embodiment, the first support rod 11 and the second support rod 12 are rotationally connected by means of a pin shaft. The rotational structure is simple, facilitating the connection between the first support rod 11 and the second support rod 12. Other hinged mounting methods can also be adopted, and no specific limitation is made here.

[0057] Similarly, there are also various rotational connection methods between the connecting rod 21 and the mounting bracket 22, as long as the rotational connection between the two rod segments can be realized. For example, rotational connection by means of a pin shaft, or rotational connection by means of a hinged hinge, hinge, etc. No specific limitation is made here.

[0058] It should be noted that in this embodiment, the mounting bracket 22 is limited on the first rod segment 11a through the first limiting structure, such that the mounting bracket 22 cannot move relative to the first support rod 11. The first limiting structure is arranged between the mounting bracket 22 and the first support rod 11, and there can be various implementation manners. For example, a separately provided fastening member that cooperatively connects the mounting bracket 22 and the first support rod 11, etc.

[0059] Specifically, please refer to Figure 3 , in this embodiment, the first limiting structure includes a limiting portion 221 provided on the mounting bracket 22 and a cooperating portion 111 provided on the first rod segment 11a. The mounting bracket 22 moves towards the first rod segment 11a such that the limiting portion 221 and the cooperating portion 111 are limited and fixed, and the first limiting structure is in the limiting state. In this embodiment, the limiting portion 221 and the cooperating portion 111 are directly provided on the mounting bracket 22 and the first rod segment 11a. By the movement of the mounting bracket 22, the limiting portion 221 and the cooperating portion 111 are limited and fixed to each other without the need to provide additional components for fixing. Only by moving the mounting bracket 22, the structure is simpler and more convenient to operate.

[0060] In another embodiment, the push rod 3 is provided with an unlocking portion for driving the first limiting structure to release the limit. In this embodiment, unlocking is driven by the unlocking portion, which is convenient for controlling the first limiting structure. Unlocking can be performed through the push rod, and the operation is simple.

[0061] It should be noted that among the two related technical features of providing the limiting portion 221 and the cooperating portion 111 and providing the unlocking portion, either one can exist, or both can exist simultaneously.

[0062] Among them, there are various ways to set the limiting portion 221 and the cooperating portion 111. For example, the limiting portion 221 and the cooperating portion 111 are formed by mutually cooperating snap fasteners.

[0063] Similarly, there are also various implementation manners for the unlocking portion. For example, a switch member for controlling the first limiting structure to switch states.

[0064] Specifically, in this embodiment, one end of the mounting bracket 22 facing the first rod segment 11a forms a limiting card slot 221a; a limiting protrusion 111a is provided on the first rod segment 11a, and the limiting protrusion corresponds to the limiting card slot 221a. The limiting protrusion 111a is snap-fitted into the limiting card slot 221a such that the first limiting structure is in the limiting state. In this embodiment, the limiting portion 221 and the cooperating portion 111 are formed by the limiting card slot 221a and the limiting protrusion 111a. The fixed limit between the limiting portion 221 and the cooperating portion 111 is realized by the snap-fastening of the protrusion and the slot. The limiting method is simple and reliable. Only by moving the mounting bracket 22, the limiting protrusion 111a can be snap-fitted into the limiting card slot 221a or disengaged from the limiting card slot, and the operation method is simple without excessive operation.

[0065] Further, please refer to Figure 4 , in this embodiment, the limiting slot 221a includes two relatively arranged slot side walls, and the two slot side walls include a movable slot side wall which is movably arranged. The movable slot side wall moves to adjust the distance between the two slot side walls, so as to buckle or unlock the limiting protrusion 111a. Among them, the unlocking part is used to drive the movable slot side wall to move to increase the distance between the two slot side walls, so as to unlock the buckling of the limiting protrusion 111a into the limiting slot 221a.

[0066] It should be noted that the mounting bracket 22 includes a bracket body 2211 and a rotating member 2212. One end of the rotating member 2212 is rotatably mounted on the bracket body 2211, and the other end and the bracket body form the limiting slot 221a. The bracket body 2211 and the rotating member 2212 respectively form the two slot side walls.

[0067] A mating inclined surface is formed on the rotating member 2212. The push rod 3 abuts against the mating inclined surface. The push rod 3 moves, so that the rotating member 2212 rotates along the mating inclined surface to adjust the distance between the two slot side walls. The unlocking part includes the first inclined surface.

[0068] Please refer to Figure 5 , in this embodiment, in order to facilitate the push rod 3 to push the rotating member 2212, a driving block 311 is arranged at the end of the push rod 3, and a first inclined surface is formed on the driving block 311, which is arranged corresponding to the mating inclined surface.

[0069] In another embodiment, one end of the mounting bracket facing the first rod segment 11a is movably provided with a movable member, and the limiting part 221 is arranged on the movable member. In this embodiment, the limiting and unlocking between the mounting bracket 22 and the first rod segment 11a can be completed without moving the mounting bracket 22.

[0070] Similarly, in this embodiment, the limiting slot can also be provided on the movable member, so as to fix the mounting bracket 22 and the first rod segment 11a by buckling.

[0071] On the other hand, please refer to Figure 6, two first support rods 11 are provided, and the two first support rods 11 are arranged at intervals; two second support rods 12 are provided, and the two second support rods 12 are arranged at intervals; the mounting bracket 22 is rotatably connected to the second rod section 12a of at least one second support rod 12, and the connecting rod 21 is rotatably connected to the first rod section 11a of at least one first support rod 11. In this embodiment, a scissor structure is formed between the first support rod 11 and the second support rod 12. Through the two first support rods 11 and the two second support rods 12, two scissor structures arranged at intervals are formed, which can facilitate other load-bearing components of the trolley 100 to be carried on the first support rod 11 and the second support rod 12. Among them, the connecting rod 21 and the mounting bracket 22 are respectively connected to at least one rod section of one of the scissor structures. Regarding the two scissor structures as a whole, a four-bar linkage structure can also be formed to realize the relative rotation or position fixation between the first support rod 11 and the second support rod 12.

[0072] Furthermore, a connecting portion 121 is provided between the second rod ends 12a of the two second support rods 12; the mounting bracket 22 is rotatably mounted on the connecting portion 121. In this embodiment, through the connecting portion 121, the mounting bracket 22 is rotatably connected to the two second support rods 12 at the same time, which is convenient for the two second support rods 12 to form a whole and be connected to the mounting bracket 22, simplifies the connection structure between the two second support rods 12 and the mounting bracket 22, eliminates the need to set multiple mounting brackets 22, and strengthens the structural strength of the trolley 100.

[0073] It should be noted that there are various ways to rotatably mount between the mounting bracket 11 and the connecting portion 121. For example, the mounting bracket 11 and the connecting portion 121 are connected by passing a pin shaft through them.

[0074] Furthermore, please refer to Figure 7 , in this embodiment, the connecting portion 121 includes a connecting cross bar, the connecting cross bar is square, and a rotating mounting portion 122 is provided outside the connecting cross bar; one end of the mounting bracket 22 is provided with a mounting sleeve 221, and the mounting sleeve 221 is rotatably sleeved with the rotating mounting portion 122. In this embodiment, the two second support rods 12 are connected by the connecting cross bar, the rotating mounting portion 122 is sleeved on the connecting cross bar, and the rotating mounting portion 122 is rotatably sleeved in the mounting sleeve 221, so that the connecting cross bar can rotate in the mounting sleeve 221, thereby enabling the connecting cross bar to be rotatably mounted at the end of the mounting bracket 22, and the two second support rods 12 are rotatably mounted at the end of the mounting bracket 22 at the same time. The rotating structure is simple and the rotating method is stable and reliable.

[0075] It should be noted that in this embodiment, the rotating mounting portion 122 is a rotating bearing, which facilitates the rotating mounting of the rotating mounting portion 122 into the mounting sleeve.

[0076] In addition, since there are two first struts 11 and two second struts 12, when the connecting rod 21 is connected to one of the first struts 11, a four-bar linkage structure can be achieved.

[0077] Specifically, in this embodiment, there are two connecting rods 21. One end of each of the two connecting rods 21 is rotatably connected to the mounting bracket 22, and the other ends are respectively rotatably connected to the two first struts 11. In this embodiment, since there are two first struts 11, by connecting the two first struts 11 to the two connecting rods 21 respectively, the reliability of the movable connection between the two first struts 11 and the mounting bracket 22 can be ensured, and unilateral connection can be avoided, so that the other unconnected first strut 11 does not move stably and shakes.

[0078] In this embodiment, a strut connecting rod is provided between the two first struts. In this embodiment, through the strut connecting rod, the two first struts 11 can also be connected into a whole, which is convenient for increasing the rigidity and stability of the vehicle frame.

[0079] It should be noted that in this embodiment, the limiting portion includes the limiting card slot, and the matching portion includes the limiting protrusion; there are various setting methods for the limiting protrusion. The limiting protrusion may directly include the strut connecting rod, and the limiting card slot is directly clamped on the strut connecting rod to complete the limiting, which simplifies the structure and reduces the complexity of the components. Or, the limiting protrusion is provided on the strut connecting rod.

[0080] On the other hand, the trolley has a deployed state and a folded state. One end of the connecting rod 21 connected to the mounting bracket 22 is a hinged end; the connecting rod 21 has a first position where it rotates to the hinged end fitting on the first rod segment 11a, and a second position where it rotates to the hinged end away from the first rod segment 11a. In the deployed state, the connecting rod is in the first position, and in the folded state, the connecting rod is in the second position.

[0081] In this embodiment, in the limiting state, when unfolded, the mounting bracket 22 is fixed on the first rod 11. At this time, the connecting rod 21 is attached to the first rod segment 11a, and both ends of the connecting rod 21 are fixed on the first rod 11, so that the extending directions of the connecting rod 21 and the first rod 11 coincide. In this case, the connecting rod 21 and the first rod 11 can be regarded as rods under the same projection. At this time, the rod formed by the first rod and the connecting rod 21, the mounting bracket 22 and the second rod 12 are arranged in a triangle, ensuring the structural stability among the first rod 11, the second rod 12, the connecting rod 21 and the mounting bracket 22 in the limiting state, improving the bearing capacity, and enabling more force to be borne in the limiting state.

[0082] When the limiting state is released and it is folded, the mounting bracket 22 moves relative to the first rod 11, driving the articulated end of the connecting rod 21 to move, so that the articulated end is no longer attached to the first rod 11. At this time, the rotational folding between the link mechanisms can be realized.

[0083] On the other hand, please refer to Figure 8 , in this embodiment, in order to facilitate the two ends of the mounting bracket 22 to be respectively connected to the connecting rod 21 and the second rod end 12, the mounting bracket 22 includes a first mounting section 22a and a second mounting section 22b that are connected at one end and arranged at an angle; the connecting rod 21 is rotatably connected to the first mounting section 22a, and the second mounting section 22b is rotatably connected to the second rod segment 12a. In this embodiment, the mounting bracket 22 includes two adjacent bracket sections arranged at an angle, so that the two ends of the mounting bracket 22 extend in different directions, which can facilitate the connection with the connecting rod 21 and the second rod end 12, facilitate installation, avoid the difficulty in installing the finally formed four-bar linkage structure due to the limitation of the installation angle, ensure smooth movement, and reduce dead points.

[0084] Furthermore, the push rod 3 is telescopically arranged. So that after folding, the push rod 3 can be retracted, facilitating the overall contraction of the trolley 100.

[0085] It should be noted that there are various ways for the push rod 3 to expand and contract, such as a folding rod, etc.

[0086] Even further, please refer to Figure 9In this embodiment, the push rod 3 includes a telescopic sleeve 31 and a telescopic rod 32; one end of the telescopic sleeve 31 is slidably mounted on the mounting bracket 22; one end of the telescopic rod 32 is movably inserted into the telescopic sleeve 31, and the other end forms a hand-held portion 321. In this embodiment, the telescopic structure of the push rod 3 is realized by movably sleeved the telescopic rod 32 in the telescopic sleeve 31, which has a simple structure and a mature and reliable telescopic method.

[0087] It should be noted that there are many ways for the telescopic rod 32 to be movably inserted into the telescopic sleeve 31. The telescopic position can be fixed by a transition fit, or positioning protrusions and grooves can be provided between the opposite side walls of the telescopic rod 32 and the telescopic sleeve 31 to achieve positioning and telescoping at a specific position.

[0088] The hand-held portion 321 has a variety of implementations. In this embodiment, a handle is provided at the other end of the telescopic rod 32 to form the hand-held portion, and no specific limitation is made here.

[0089] In addition, there are many ways to movably mount the push rod 3 on the mounting bracket 22, such as by using slide rails and slide grooves that cooperate with each other to achieve the sliding of the push rod 3 on the mounting bracket 22.

[0090] Specifically, in this embodiment, a sliding hole is formed on the mounting bracket 22, and the push rod 3 is slidably inserted into the sliding hole. In this embodiment, the sliding installation of the push rod 3 is realized through the sliding hole, the structure is simple, and the installation position of the push rod 3 and the mounting bracket 22 can be partially overlapped, thereby reducing the volume of the cart 100 and facilitating storage after folding.

[0091] It should be noted that there are many ways to slide the push rod 3 into the sliding hole on the mounting bracket 22. For example, a locking piece is also provided to limit the position of the push rod 3 on the mounting bracket 22, so as to ensure the use of the push rod 3 and prevent the movement of the push rod 3 from causing the push rod 3 to slide when subjected to force.

[0092] In addition, the cart 100 has an unfolded state and a folded state; the cart 100 also includes a second limiting structure arranged between the push rod 3 and the mounting bracket 22. When the cart 100 is in the unfolded state, the second limiting structure limits the push rod 3 and the mounting bracket 22.

[0093] In this embodiment, the second limiting structure includes a locking tongue 312 movably mounted on the push rod 3. A locking groove is formed at a position on the mounting bracket 22 corresponding to the locking tongue 312 in the unfolded state. The locking tongue 312 extends into the locking groove to limit the push rod 3 and the mounting bracket 22.

[0094] It should be noted that the push rod 3 includes a telescopic sleeve 31 and a telescopic rod 32. The locking tongue 312 protrudes from the outer side wall of the telescopic sleeve 31. A driving structure is formed between the telescopic rod 32 and the locking tongue 312 to movably drive the locking tongue to extend out of the locking groove.

[0095] One end of the locking tongue 312 is movably mounted in the telescopic sleeve 31. A guiding inclined surface is formed at the end of the locking tongue in the telescopic sleeve. The lower end of the telescopic rod 32 abuts against the guiding inclined surface, and moving the telescopic rod 32 drives the locking tongue to extend out of the locking groove. An elastic member is provided between the locking tongue 312 and the telescopic sleeve 31 to drive the locking tongue 312 to extend into the locking groove.

[0096] In addition, in this application, a driving block 311 is further provided on the locking tongue 31.

[0097] When the telescopic rod 32 acts on the locking tongue 312 to unlock the second limiting structure, it forms an integral body with the locking tongue 312 and continues to slide downward until the first inclined surface on the driving block 311 abuts against the mating inclined surface on the rotating member 2212, pushing the rotating member 2212 to rotate so as to unlock the first limiting structure.

[0098] Please refer to Figures 10 to 11 , a third limiting structure is further formed between the push rod 3 and the mounting bracket 22. When the cart is in the folded state, the third limiting structure limits the mounting bracket 22 and the push rod 3. In this embodiment, when the cart is in the folded state, the mounting bracket 22 can move relative to the first support rod 11, and thus can drive the four-link structure on the entire cart to move and fold. At this time, in order to ensure that after folding in place, it can remain in the folded state, the mounting bracket 22 and the push rod 3 are limited so that the relative position between the mounting bracket 22 and the push rod 3 is maintained. When lifting the entire cart 100 through the push rod 3, the mounting bracket 22 will not slide and move to the limiting state, resulting in accidental unfolding of the cart.

[0099] It should be noted that the second limiting structure has various implementation manners, such as through mutually cooperating buckles, or mutually cooperating protrusions and grooves, etc.

[0100] Specifically, in this embodiment, the second limiting structure includes a limiting claw 41 provided on the push rod 3. A clamping space for clamping the mounting bracket is formed between the limiting claw 41 and the outer side wall of the push rod 3. In this embodiment, when the mounting bracket 22 is in the released limiting state and moves on the push rod 3, the mounting bracket 22 moves to be clamped by the limiting claw 41, thereby restricting the position of the mounting bracket 22. The structure is simple and reliable, and is convenient for clamping.

[0101] Further, in this embodiment, a clamping step is provided on the outer side wall of the mounting bracket 22, and the limiting claw 41 is clamped on the clamping step to ensure the stability of clamping and prevent the mounting bracket 22 from detaching between the limiting claw 41 and the outer side wall of the push rod 3 due to impact force.

[0102] On the other hand, in this embodiment, a hook is further provided on the mounting bracket 22, so that after folding the stroller 100, the mounting bracket 22 can be hung up through the hook, and then the whole stroller 100 can be hung up for storage.

[0103] In the embodiment provided by the present utility model, the stroller 100 further includes a seat assembly, and the seat assembly is mounted on the first support rod 11 to carry children.

[0104] In addition, rollers are further provided on the first support rod 11 and the second support rod 12 to facilitate the movement of the stroller 100.

[0105] Specifically, in the embodiment provided by the present utility model, there are two second support rods 12, and the two second support rods 12 are arranged at intervals. One end of each of the two second support rods 12 is provided with a connecting portion, and the connecting portion includes the connecting cross bar. The connecting cross bar is square-shaped, and a rotating mounting portion is arranged outside the connecting cross bar. The middle parts of the two first support rods 11 are respectively hinged to the middle parts of the two second support rods 12, such that the second support rods and the first support rods are arranged in a cross shape, realizing the rotational setting of the two first support rods 11 and the two second support rods 12, and forming two scissor structures arranged at intervals. Connecting rods 21 are arranged on the first rod segments 11a of the two first support rods 11. The two connecting rods 21 are respectively hinged to the two first rod segments 11a and are both rotatably connected to the same mounting bracket 22. The mounting bracket 22 includes a first mounting segment 22a and a second mounting segment 22b that extend at an angle. The second mounting segment 22b is rotatably mounted on the connecting cross bar, and the two connecting rods 21 are both connected to the first mounting segment 22a. An installation sleeve is provided on the second mounting segment 22b, and the installation sleeve is rotatably sleeved with the rotating mounting portion. A sliding hole is formed on the mounting bracket 22. The trolley 100 further includes a push rod 3. The push rod 3 is slidably mounted in the sliding hole, and the push rod 3 is telescopic. A limit claw 41 is arranged on the push rod 3, and the mounting bracket 22 is held by the limit claw 41.

[0106] In the specific embodiment provided by the present utility model, when folding, first contract the push rod 3, making the push rod 3 shorter and actively abutting against the side wall of the activity groove, opening the limit card slot, releasing the fixed limit between the first rod segment 11a and the mounting bracket 22, such that the first support rod 11, the second support rod 12, the connecting rod 21, and the mounting bracket 22 can rotate, thereby folding the bracket of the trolley. At the same time, the mounting bracket 22 slides along the push rod 3 and slides to be held by the limit claw, such that the trolley remains in the folded state.

[0107] When it is necessary to unfold, first release the holding of the mounting bracket 22 by the limit claw 41, slide the mounting bracket 22, and unfold the first support rod 11, the second support rod 12, the connecting rod 21, and the mounting bracket 22, such that the mounting bracket 22 is limited on the first support rod 11, making the four-bar linkage structure unable to move further, and maintaining the unfolded state of the trolley.

[0108] The mounting bracket 22 is limited and fixed on the first rod segment 11a through the first limiting structure, so that the mounting bracket 22 can be regarded as an integral part with the first support rod 11, resulting in the inability of the connecting rod 21 to move, and further causing the second support rod 12 to be unable to move. The degrees of freedom of each rod of the four-bar linkage structure are zero, so that there is no relative rotation between the first support rod 11, the second support rod 12, the connecting rod 21 and the mounting bracket 22. Furthermore, the structural stability of the formed four-bar linkage structure can be maintained, the stable unfolding of the trolley 100 can be maintained, and the structure deformation caused by the movement of each rod can be avoided. By releasing the limiting state, an articulated four-bar linkage structure is formed between the first support rod 11, the second support rod 12, the connecting rod 21 and the mounting bracket 22, and relative rotation can occur between multiple rods. Furthermore, the movable fitting between the rods can be completed, and the folding of the trolley 100 can be realized. The folding and unfolding methods are simple and reliable, and the movement mode is stable. At the same time, only by fixing the mounting bracket 22 and the first rod segment 11a can the switching between unfolding and folding be realized, and the operation is simple and reliable, which is convenient for use.

[0109] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A cart, characterized in that: include: A first support rod and a second support rod, wherein the middle portion of the first support rod and the middle portion of the second support rod are rotatably connected so that the second support rod and the first support rod are arranged crosswise, and the first support rod and the second support rod respectively have a first rod segment and a second rod segment located on the same side of their intersection; The connecting rod mechanism comprises a connecting rod and a mounting bracket, one end of which is rotatably connected to each other, the other end of the connecting rod is rotatably connected to the first rod segment, and the other end of the mounting bracket is connected to the second rod segment; A push rod is movably and adjustably mounted on the mounting bracket along its length direction.

2. The cart according to claim 1, characterized in that: The cart also includes a first limiting structure provided between the mounting bracket and the first support rod or the first rod segment, the first limiting structure having a limiting state and a limiting release state, in which the mounting bracket and the first rod segment are limited in the limiting state, and in the limiting release state, the restriction of the mounting bracket by the first rod segment is released.

3. The cart according to claim 2, characterized in that: The first limiting structure comprises a limiting portion provided on the mounting bracket and a matching portion provided on the first support rod segment, the limiting portion moves toward the matching portion so that the limiting portion and the matching portion are fixed in position, and the first limiting structure is in the limiting state; and / or, The push rod is provided with an unlocking portion for driving the first limiting structure to release the limit.

4. The cart according to claim 3, characterized in that: The mounting bracket forms a limiting slot at one end facing the first support rod, a limiting protrusion is provided on the first support rod, the limiting protrusion is provided corresponding to the limiting slot, and the limiting protrusion is buckled and installed in the limiting slot, so that the first limiting structure is in the limiting state, wherein the limiting portion includes the limiting slot, and the matching portion includes the limiting protrusion; and / or, The mounting bracket is movably provided with a movable piece at one end facing the first rod section, and the limiting portion is arranged on the movable piece.

5. The cart according to claim 4, characterized in that: The mounting bracket comprises a bracket body and a rotating member, one end of the rotating member is rotatably mounted on the bracket body, and the limiting slot is formed between the other end and the bracket body; When the unlocking portion drives the rotating member to rotate away from the bracket body, the limiting protrusion can be separated from the limiting slot.

6. The cart according to claim 1, characterized in that: There are two first support rods, and the two first support rods are arranged at intervals; There are two second support rods, and the two second support rods are arranged at intervals; The mounting bracket is rotatably connected to the second rod segment of at least one of the second support rods, and the connecting rod is rotatably connected to the first rod segment of at least one of the first support rods.

7. The cart according to claim 6, characterized in that: A connecting cross bar is provided between the second rod ends of the two second support rods, a rotatable mounting portion is provided outside the connecting cross bar, a mounting sleeve is provided at one end of the mounting bracket, and the mounting sleeve is rotatably sleeved with the rotatable mounting portion; and / or, The connecting rods are provided with two, one end of each of the connecting rods is rotatably connected to the mounting bracket, and the other end is rotatably connected to the two first support rods respectively; and / or, A support rod connecting rod is arranged between the two first support rods.

8. The cart according to claim 1, characterized in that: The cart has an unfolded state and a folded state, and one end of the connecting rod connected to the mounting bracket is a hinged end; The connecting rod has a first position in which the hinged end is rotated to fit the first rod segment, and a second position in which the hinged end is rotated to move away from the first rod segment. In the unfolded state, the connecting rod is in the first position, and in the folded state, the connecting rod is in the second position.

9. The cart according to claim 1, characterized in that: The cart has an unfolded state and a folded state; The cart further comprises a second limiting structure disposed between the push rod and the mounting bracket, wherein when the cart is in an unfolded state, the second limiting structure limits the push rod and the mounting bracket; and / or, A third limiting structure is also formed between the push rod and the mounting bracket, and when the cart is in a folded state, the third limiting structure limits the mounting bracket and the push rod; The third limiting structure includes a limiting claw disposed on the push rod, and a clamping space for clamping the mounting bracket is formed between the limiting claw and the outer side wall of the push rod.

10. The stroller according to any one of claims 1 to 9, characterized in that: The mounting bracket comprises a first mounting section and a second mounting section which are connected at one end and arranged at an angle; the connecting rod is rotatably connected to the first mounting section, and the second mounting section is rotatably connected to the second rod section; and / or, The push rod is retractable; and / or, The mounting bracket is formed with a sliding hole, and the push rod is slidably arranged in the sliding hole; and / or, The stroller also includes a seat assembly disposed on the first support rod.

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