Portable outdoor cart

Abstract

The invention provides a portable outdoor cart which comprises a cart frame structure, and the cart frame structure has a switchable state and can be switched between a folded state and an unfolded state. The linkage structure is arranged on the frame structure and is used for adjusting the conversion of the state of the frame structure; the elastic structure is arranged on the frame structure and can provide acting force in the folding or unfolding process of the frame structure, so that the state of the frame structure is changed; the control part is arranged on the frame structure and used for driving the linkage structure to act, and automatic folding or unfolding of the frame structure is achieved; when a user operates the control piece, the control piece drives the linkage structure to be in linkage fit with the elastic structure, and automatic folding or unfolding of the frame structure is achieved. By the adoption of the design, rapid and automatic folding under single-hand operation is achieved, and the problem that a traditional cart cannot be flexibly converted is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of trolleys, and particularly to a portable outdoor trolley. Background Art

[0002] In the prior art, there are various types of outdoor trolleys. Most of them have fixed structures for the surrounding rods and leg tube assemblies, which occupy a large amount of space when idle. In the folding process of the prior art, on the one hand, it is relatively cumbersome and cannot be folded simply and quickly. On the other hand, usually more than one user is required for the operation, resulting in a poor operation experience and a large volume after folding.

[0003] Chinese Patent Document No. CN218287777U disclosed a folding trolley in January 2023, which specifically disclosed a frame structure and a frame body structure installed on the frame structure. The frame body structure includes a front frame structure, and the front frame structure includes two front frame horizontal folding rods with folding joints in the middle, front frame vertical rods, and two front frame diagonal rods. The two front frame horizontal folding rods are respectively rotatably connected to the two side rods through general fixing parts or extended fixing parts; the upper and lower ends of the front frame vertical rods are respectively connected to the folding joints; a sliding sleeve that can slide along the length direction thereof is arranged on the front frame vertical rod, one ends of the two front frame diagonal rods are hinged to the sliding sleeve, and one ends of the two front frame diagonal rods are respectively hinged to the foldable sides of the front frame horizontal rod or the two ends of the side rods. Due to the large number of movable connecting parts in the above-mentioned patent document, it is relatively cumbersome to fold the trolley and cannot be folded simply and quickly.

[0004] Therefore, further improvements are needed. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a portable outdoor trolley to overcome the deficiencies in the prior art. This trolley realizes quick automatic folding under single-handed operation, with simple and convenient operation, improving the user's operation experience.

[0006] A portable outdoor trolley designed according to this purpose includes a frame structure, and the frame structure has a switchable state and can be switched between a folded state and an unfolded state; A linkage structure, which is arranged on the frame structure and is used to adjust the conversion of the state of the frame structure; An elastic structure, which is arranged on the frame structure and can provide a force during the folding or unfolding process of the frame structure to cause a change in the state of the frame structure; A control member, which is arranged on the frame structure and is used to drive the action of the linkage structure to realize the automatic folding or unfolding of the frame structure; Wherein, when the user operates the control member, the control member drives the linkage structure and the elastic structure to cooperate in linkage, so as to realize the automatic folding or unfolding of the frame structure.

[0007] The frame structure includes a chassis and an armrest linkage assembly, and the linkage structure is hingedly connected to the chassis and the armrest linkage assembly.

[0008] The control member is arranged on the armrest linkage assembly, and the control member drives the linkage structure, so that the armrest linkage assembly and the chassis approach and fold each other through the elastic structure and the linkage structure.

[0009] The frame structure further includes a push handle, and the push handle is rotatably arranged on the frame structure so as to be turned up and down.

[0010] The linkage structure includes a sliding sleeve and a fourth connecting rod. The frame structure further includes a support frame. The sliding sleeve is slidably arranged on the support frame. One end of the fourth connecting rod is connected to the sliding sleeve, and the other end of the fourth connecting rod is connected to the push handle. The fourth connecting rod rotates up and down through the push handle, so that the sliding sleeve slides up and down on the frame structure, and further drives the linkage cooperation of the linkage structure and the elastic structure to realize the automatic folding or unfolding of the frame structure; Alternatively, the control member is arranged on the push handle, the control member is connected to the sliding sleeve, and the sliding sleeve can slide up and down on the support frame through the control member, so as to change the state of the frame structure; Alternatively, the control member is arranged on the sliding sleeve, and the sliding sleeve slides up and down on the support frame through the control member, so as to change the state of the frame structure.

[0011] The linkage structure further includes a connecting rod assembly hinged to the chassis and a third connecting rod hinged to the armrest linkage assembly. The chassis realizes mutual approach and folding through the connecting rod assembly, the elastic structure, and the armrest linkage assembly realizes mutual approach and folding through the third connecting rod.

[0012] There are at least two chassis, and the two chassis are hingedly connected to each other, and the elastic structure is arranged between the two chassis.

[0013] There are multiple elastic structures, and the multiple elastic structures are arranged at intervals in a staggered manner between the two chassis.

[0014] The elastic structure includes a tension spring, a torsion spring, or a compression spring.

[0015] There are at least two sets of the support frames, and positioning members for supporting the chassis are provided on at least two sets of the support frames. When the frame structure is folded, a storage space is formed by the corresponding two sets of the support frames through the positioning members; the chassis, the armrest linkage assembly, and the elastic structure are folded in the storage space.

[0016] Compared with the prior art, the portable outdoor trolley of the above embodiment realizes fast automatic folding under single - hand operation through the collaborative design of the frame structure, the linkage structure, the elastic structure, and the control member. The frame structure, through the switchable folding and unfolding states, solves the problem that traditional trolleys cannot flexibly transform their forms; by transmitting the operating force of the control member to each component of the frame, it overcomes the defect of complex folding steps caused by multi - joint connections; the elastic structure actively releases the pre - stored acting force during the folding process, reducing the user's force application intensity; by driving the linkage structure and the elastic structure to form a mechanical linkage, the folding action changes from a passive step - by - step operation to a continuous automatic process. Each component is integrated into the frame structure in terms of spatial layout and forms a compact storage form after folding, ultimately achieving the effects of simplifying the operation steps, reducing the use threshold, and shrinking the storage volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of a portable outdoor trolley with a control member in an embodiment of the present invention.

[0020] Figure 2 It is a schematic unfolded diagram of a portable outdoor trolley in an embodiment of the present invention.

[0021] Figure 3 It is an exploded view of a portable outdoor trolley in an embodiment of the present invention.

[0022] Figure 4 It is a schematic diagram of a linkage structure and a sliding sleeve structure in an embodiment of the present invention.

[0023] Figure 5 It is a schematic diagram of the starting folding state of a portable outdoor trolley in an embodiment of the present invention.

[0024] Figures 6 - 7 Schematic diagrams of the gradually folding state of a portable outdoor cart in an embodiment of the present invention respectively.

[0025] Figure 8 Schematic diagram of the fully folded state of a portable outdoor cart in an embodiment of the present invention. Detailed implementation manners

[0026] To make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given in conjunction with the accompanying drawings. Many specific details are set forth in the following description to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0027] As Figures 1 - 8 shown, a portable outdoor cart is provided, including a frame structure 1, the frame structure 1 having a switchable state and being capable of switching between a folded state and an unfolded state; a linkage structure 2, the linkage structure 2 being disposed on the frame structure 1 and used for adjusting the state conversion of the frame structure 1; an elastic structure 3, the elastic structure 3 being disposed on the frame structure 1 and capable of providing a force during the folding or unfolding process of the frame structure 1 to cause a change in the state of the frame structure; a control member 4, the control member 4 being disposed on the frame structure 1 and used for driving the action of the linkage structure 2 to realize the automatic folding or unfolding of the frame structure 1; wherein, when the user operates the control member 4, the control member 4 drives the linkage structure 2 and the elastic structure 3 to cooperate in a linkage manner to realize the automatic folding or unfolding of the frame structure 1.

[0028] Furthermore, the control member 4 is connected to the linkage structure 2, and the frame structure 1 realizes the automatic folding or unfolding under the combined linkage of the linkage structure 2 and the elastic structure 3; wherein, the frame structure 1 is composed of a chassis 101 and an armrest linkage assembly 102 to form a foldable skeleton through multiple hinge pivot points, and is integrated with a push handle 103 through a support frame 104. After the user triggers the control member 4, the sliding sleeve 201 generates a vertical slip on the support frame 104, driving the chassis 101 and the armrest linkage assembly 102 to fold synchronously, and automatically completing the folding under the assistance of the elastic structure 3. When the sliding sleeve 201 moves to the folding limit position, the center of gravity projection of the chassis 101 and the armrest linkage assembly 102 is located between the two support frames 104, enabling the folded frame structure 1 to maintain an upright state without additional support.

[0029] Specifically, the linkage structure 2 refers to a transmission device that transmits mechanical motion, which can be specifically implemented by a linkage mechanism or a rack and pinion assembly, converting the linear motion of the control member 4 into the rotation or sliding of various parts of the vehicle frame; the elastic structure 3 refers to an element that stores mechanical energy and provides a force, and its pre-compressed state releases energy during the folding process to assist in completing the action; the control member 4 refers to a triggering device directly operated by the user, which can be specifically implemented by a button, a lever or a knob, and is connected to the linkage structure 2 through a wire rope or a linkage to form a mechanical transmission path for operation instructions.

[0030] When the user presses the control member 4, the wire rope pulls the sliding sleeve 201 of the linkage structure 2 to slide. The movement of the sliding sleeve 201 drives the linkage structure 2 to generate an angular change, causing the armrest linkage assemblies 102 and the chassis 101 on both sides of the vehicle frame structure 1 to fold together; in the unfolded state, the elastic structure 3 remains in a stretched state, maintaining the stability of the vehicle frame form through pre-tension. During the whole process, the user only needs to operate the control member 4 once to trigger the continuous folding action, without adjusting the positions of each joint step by step.

[0031] Compared with the prior art, traditional push carts need to be manually unlocked at multiple hinge points and folded step by step, while in this solution, the multi-joint movement is converted into a single linear drive through the linkage structure.

[0032] Through the above technical solution, the present application realizes rapid automatic folding with one hand operation, solves the technical problem of cumbersome multi-step operation, and through the synergistic effect of mechanical linkage and elastic assistance, makes the folding process more labor-saving and efficient. The compact folding form of the vehicle frame structure significantly reduces the storage space, meeting the portable requirements of outdoor equipment.

[0033] Furthermore, as Figure 1 and Figure 2 shown, the vehicle frame structure 1 includes a chassis 101 and an armrest linkage assembly 102, and the linkage structure 2 is hingedly connected to the chassis 101 and the armrest linkage assembly 102.

[0034] Specifically, when the user applies a folding operation, the force acting on the armrest linkage assembly 102 is synchronously transmitted to the chassis 101 through the hinge points of the linkage structure 2. The linkage structure 2 forms a rigid connection between the chassis 101 and the armrest linkage assembly 102, keeping the relative movement trajectories of the two in sync. The chassis 101 generates an inward rotational displacement under the constraint of the hinge points, while the armrest linkage assembly 102 folds and contracts downward under the action of the same hinge points. This force transmission path enables the chassis 101 and the armrest linkage assembly 102 to form a linkage folding mechanism, achieving the coordinated folding action of the two without additional operation.

[0035] Furthermore, as Figure 1 and Figure 2As shown, the control member 4 is provided on the armrest linkage assembly 102. The control member 4 drives the linkage structure 2, so that the armrest linkage assembly 102 and the chassis 101 are folded towards each other through the elastic structure 3 and the linkage structure 2.

[0036] Specifically, the control member 4 refers to the actuator that triggers the folding action, and can be specifically implemented by a button or a lever. It is installed at a position on the surface of the armrest linkage assembly 102 that is convenient for one-handed operation. When the user presses the control member 4 on the armrest linkage assembly 102, the control member 4 triggers the motion transmission of the linkage structure 2 through mechanical linkage. The linkage structure 2 converts the operating force into the relative displacement between the chassis 101 and the armrest linkage assembly 102. At this time, the elastic structure 3 is compressed or stretched during the folding process.

[0037] Through the above technical solutions, the present application realizes folding the stroller with one-handed operation, eliminating the complexity of multi-step operations. The cooperative driving mechanism of the linkage structure 2 and the elastic structure 3 effectively reduces the manual intervention required during the folding process and avoids operation errors caused by synchronous adjustment of multiple joints. The rigid constraint motion path of the chassis and the armrest linkage assembly minimizes the overall volume after folding while ensuring the folding reliability.

[0038] Furthermore, as Figure 1 and Figure 2 shown, the frame structure 1 further includes a push handle 103, and the push handle 103 is rotatably arranged on the frame structure 1 so as to be turned up and down.

[0039] Specifically, the push handle 103 is a component for the user to hold and operate. The push handle can be adjusted at an angle within the range of 0 - 180 degrees in the vertical plane around the hinge axis, so that the push handle 103 maintains a fixed angle when unfolded and can apply an external force to change its posture when folded; The push handle 103 is connected to the support frame of the frame structure 1 through a rotating shaft. In the unfolded state, the push handle is in the vertical direction to provide holding support. When the folding action is triggered, the push handle 103 is driven by the linkage structure 2 to rotate around the rotating shaft towards the frame structure 1 until it is flat against the frame structure 1. During this process, the flipping trajectory of the push handle 103 is synchronized with the folding action of the chassis 101. The rotational motion of the push handle is converted into the linear sliding of the sliding sleeve 201 on the support frame 104 through the fourth link 202, thereby driving the armrest linkage assembly 102 and the chassis 101 to fold; Since the push handle 103 is directly arranged at the rotation node of the frame, complete folding can be achieved without additional disassembly steps.

[0040] Furthermore, as Figure 1 and Figure 4As shown, the linkage structure 2 includes a sliding sleeve 201 and a fourth connecting rod 202. The frame structure 1 further includes a support frame 104. The sliding sleeve 201 is slidably disposed on the support frame 104. One end of the fourth connecting rod 202 is connected to the sliding sleeve 201, and the other end of the fourth connecting rod 202 is connected to the push handle 103. The fourth connecting rod 202 rotates up and down through the push handle 103, so that the sliding sleeve 201 slides up and down on the frame structure 1, thereby driving the linkage cooperation between the linkage structure 2 and the elastic structure 3 to realize the automatic folding or unfolding of the frame structure 1; Alternatively, the control member 4 is disposed on the push handle 103. The control member 4 is connected to the sliding sleeve 201. The sliding sleeve 201 can slide up and down on the support frame 104 through the control member 4, so as to change the state of the frame structure 1; Alternatively, the control member 4 is disposed on the sliding sleeve 201. The sliding sleeve 201 slides up and down on the support frame 104 through the control member 4, so as to change the state of the frame structure 1.

[0041] Specifically, when the user flips the push handle 103, without additionally providing a dedicated control member 4, directly using the push handle 103 and the fourth connecting rod 202 to form a rotating pair, the fourth connecting rod 202 drives the sliding sleeve 201 to generate a vertical displacement along the support frame 104. When the sliding sleeve 201 slides, it drives the movement of other link components in the linkage structure 2 through the connection point, and at the same time compresses or stretches the elastic structure 3 to store mechanical energy. When the sliding sleeve 201 moves to a preset position, the elastic structure 3 releases energy, pushing the bottom frame 101 and the armrest linkage assembly 102 to generate a relative displacement to complete the automatic folding or unfolding.

[0042] In another embodiment, the control member 4 can be disposed on the push handle 103, that is, when the user presses the control member 4 on the push handle 103 with one hand, the locking state of the sliding sleeve 201 can be released. At this time, the flipping of the push handle 103 and the sliding of the sliding sleeve 201 are synchronized.

[0043] In still another embodiment, the control member 4 can be disposed on the sliding sleeve 201, and the user can realize position adjustment by pushing and pulling the sliding sleeve 201 itself.

[0044] Furthermore, as Figure 1 and Figure 4 shown, the linkage structure 2 further includes a link assembly 203 hinged to the bottom frame 101 and a third connecting rod 204 hinged to the armrest linkage assembly 102. The bottom frame 101 realizes mutual folding by means of the link assembly 203 and the elastic structure 3, and the armrest linkage assembly 102 realizes mutual folding through the third connecting rod 204.

[0045] Specifically, the connecting rod assembly 203 refers to a mechanism that can transmit motion formed by connecting multiple connecting rod members through hinge points. Specifically, two connecting rod members with equal lengths can be respectively hinged to the chassis 101 and the sliding sleeve 201 at both ends to achieve the directional displacement when the chassis 101 is folded. The function of the third connecting rod 204 is to realize the synchronous motion transmission path.

[0046] When the user triggers the control member 4, the third connecting rod 204 transmits the motion to the sliding sleeve 201, causing the sliding sleeve 201 to generate a sliding displacement on the support frame 104. At the same time, the connecting rod assembly 203 drives the chassis 101 to rotate around the hinge point under the action of the displacement of the sliding sleeve 201. During this process, the elastic structure 3 is compressed or stretched, and the accumulated elastic potential energy is released at the folding critical point, prompting the chassis 101 and the armrest linkage assembly 102 to approach the center of the support frame 104 at the same angular velocity.

[0047] Furthermore, as Figure 1 and Figure 4 shown, the linkage assembly 203 includes a first connecting rod 2031 and a second connecting rod 2032 that are hinged to each other. The first connecting rod 2031 is connected to the chassis 101, and the second connecting rod 2032 is connected to the sliding sleeve 201.

[0048] Furthermore, as Figures 1 - 3 shown, there are at least two chassis 101. The two chassis 101 are hinged to each other, and the elastic structure 3 is arranged between the two chassis 101.

[0049] Specifically, two independent chassis 101 are connected through a revolute pair to form a foldable structure, which can be realized by using a metal hinge or a rotating shaft connection, so that the chassis 101 generates relative rotation around the hinge point during the folding process, forming a linkage folding effect.

[0050] When the user triggers the folding operation, one of the chassis 101 starts to rotate under the external force, drives the other chassis 101 to rotate synchronously through the hinge point, and the elastic structure 3 is stretched or compressed during this process. The stored energy provides auxiliary power for the subsequent folding action. During the unfolding process, the restoring force of the elastic structure 3 drives the two chassis 101 to rotate in the opposite direction until they are fully unfolded. Furthermore, as Figure 1 and Figure 2 shown, there are multiple elastic structures 3, and the multiple elastic structures 3 are arranged at staggered intervals between the two chassis 101.

[0051] Specifically, the staggered interval arrangement means that the multiple elastic structures 3 are arranged between the two chassis 101 in an asymmetric or staggered manner, so as to balance the forces on each part during the folding process. It is realized by setting elastic structures 3 with different directions between different hinge points of the chassis 101, avoiding the multiple elastic structures 3 from overlapping or interfering with each other in space.

[0052] Furthermore, the elastic structure 3 includes a tension spring, a torsion spring, or a compression spring.

[0053] Furthermore, as Figure 1 and Figure 2 shown, there are at least two sets of support frames 104. Positioning members 1041 for supporting the chassis 101 are provided on at least two sets of support frames 104. When the frame structure 1 is folded, a storage space is formed by the corresponding two sets of support frames 104 through the positioning members 1041; the chassis 101, the armrest linkage assembly 102, and the elastic structure 3 are folded on the storage space.

[0054] Specifically, when the support frame 104 is converted from the unfolded state to the folded state, the two sets of support frames 104 perform a rotational movement around the hinge axis. The positioning member 1041 generates a displacement on the contact surface with the chassis 101 during the folding process of the support frame 104, forming a dislocation structure with a height difference. At this time, the inner side walls of the two sets of support frames 104 form parallel and opposing constraint surfaces through the limiting action of the positioning member 1041. The chassis 101 is embedded between the two sets of support frames 104 under the pulling force of the elastic structure 3. The armrest linkage assembly 102 is folded under the traction of the third link 204, and the elastic structure 3 contracts into the gap between the support frames 104 as the chassis 101 displaces, so that the folded cart components are arranged in a compact manner.

[0055] Furthermore, as Figures 1 - 3 shown, the armrest linkage assembly 102 includes at least a pair of first tube bodies 1021 and second tube bodies 1022 provided. One end of the third link 204 is connected to the first tube body 1021, and the other end of the third link 1021 is connected to the sliding sleeve 201. A rotating tooth 10221 is provided at one end of the second tube body 1022, and the pair of second tube bodies 1022 are meshed and rotated through the rotating tooth 10221; The armrest linkage assembly 102 further includes a fixed seat 1023. The fixed seat 1023 is provided with a first accommodation space for the second tube body 1022 to rotate and a second accommodation space for the rotating tooth 10221 to rotate. The other ends of the first tube body 1021 and the second tube body 1022 can rotate relative to the fixed seat 1023 respectively.

[0056] Furthermore, as Figures 1 - 4 shown, the frame structure 1 further includes a positioning member 105 for fixedly connecting the first tube body 1021. The support member 104 and the positioning member 105 are arranged at intervals along the height direction of the support frame 104.

[0057] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention.

[0058] In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly specifying 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 the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0059] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0061] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0062] It should also be understood that when interpreting the connection relationship or position relationship of elements, although not explicitly described, the connection relationship and position relationship are interpreted to include an error range, and this error range should be within the acceptable deviation range of a specific value determined by those skilled in the art. For example, "about", "approximate" or "substantially" can mean within one or more standard deviations, which are not defined herein.

[0063] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0064] The above embodiments only express several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A portable outdoor trolley, characterized in that: including a frame structure (1), the frame structure (1) having a switchable state and being capable of switching between a folded state and an unfolded state; a linkage structure (2), the linkage structure (2) being provided on the frame structure (1) for adjusting the state conversion of the frame structure (1); an elastic structure (3), the elastic structure (3) being provided on the frame structure (1), which can provide a force during the folding or unfolding of the frame structure (1) to cause a change in the state of the frame structure; a control member (4), the control member (4) being provided on the frame structure (1) for driving the action of the linkage structure (2) to achieve automatic folding or unfolding of the frame structure (1); wherein, when the user operates the control member (4), the control member (4) drives the linkage structure (2) and the elastic structure (3) to cooperate in a linkage manner to achieve automatic folding or unfolding of the frame structure (1).

2. The portable outdoor trolley according to claim 1, wherein: The frame structure (1) includes a chassis (101) and an armrest linkage assembly (102), and the linkage structure (2) is hingedly connected to the chassis (101) and the armrest linkage assembly (102).

3. The portable outdoor trolley according to claim 2, wherein: The control member (4) is provided on the armrest linkage assembly (102), and the control member (4) drives the linkage structure (2) so that the armrest linkage assembly (102) and the chassis (101) are folded towards each other through the elastic structure (3) and the linkage structure (2).

4. The portable outdoor trolley according to claim 2, wherein: The frame structure (1) further includes a push handle (103), and the push handle (103) is rotatably arranged on the frame structure (1) so as to be turned up and down.

5. The portable outdoor trolley according to claim 4, wherein: The linkage structure (2) includes a sliding sleeve (201) and a fourth link (202), the frame structure (1) further includes a support frame (104), the sliding sleeve (201) is slidably arranged on the support frame (104), one end of the fourth link (202) is connected to the sliding sleeve (201), the other end of the fourth link (202) is connected to the push handle (103), and the fourth link (202) rotates up and down through the push handle (103) to make the sliding sleeve (201) slide up and down on the frame structure (1), thereby driving the linkage cooperation of the linkage structure (2) and the elastic structure (3) to achieve automatic folding or unfolding of the frame structure (1); or, the control member (4) is provided on the push handle (103), the control member (4) is connected to the sliding sleeve (201), and the sliding sleeve (201) can slide up and down on the support frame (104) through the control member (4) to cause a change in the state of the frame structure (1); or, the control member (4) is provided on the sliding sleeve (201), and the sliding sleeve (201) slides up and down on the support frame (104) through the control member (4) to cause a change in the state of the frame structure (1).

6. The portable outdoor trolley according to claim 4, wherein: The linkage structure (2) further includes a link assembly (203) hinged to the chassis (101) and a third link (204) hinged to the armrest linkage assembly (102). The chassis (101) realizes mutual approach and folding through the link assembly (203) and the elastic structure (3), and the armrest linkage assembly (102) realizes mutual approach and folding through the third link (204).

7. The portable outdoor trolley according to claim 2, characterized in that: At least two chassis (101) are provided. The two chassis (101) are hinged to each other, and the elastic structure (3) is arranged between the two chassis (101).

8. The portable outdoor trolley according to claim 7, wherein: A plurality of elastic structures (3) are provided. The plurality of elastic structures (3) are arranged at staggered intervals between the two chassis (101).

9. The portable outdoor trolley according to any one of claims 1, 7 or 8, characterized in that: The elastic structure (3) includes a tension spring, a torsion spring, or a compression spring.

10. The portable outdoor trolley according to claim 5, characterized in that: At least two groups of support frames (104) are provided. Positioning members (1041) for supporting the chassis (101) are provided on at least two groups of support frames (104). When the vehicle frame structure (1) is folded, a storage space is formed by the corresponding two groups of support frames (104) through the positioning members (1041); the chassis (101), the armrest linkage assembly (102), and the elastic structure (3) are folded on the storage space.

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