Multi-state transport device with synchronous accommodation structure and state conversion method thereof

Abstract

This invention relates to a multi-state transport device with a synchronous containment structure, comprising a main structure, deformable units respectively disposed on both sides of the main structure, movable support components respectively associated with the deformable units, and an additional synchronous structure for applying synchronous retraction drive to the deformable units on both sides during containment. When transitioning from an expanded state to a containment state, the synchronous structure applies synchronous retraction drive to the deformable units on both sides in the containment direction, forming motion coupling and establishing a motion linkage retraction relationship between the deformable units on both sides, forcing the deformable units on both sides to contain synchronously, and the movable support components on both sides synchronously retract from the ground support position to the containment position. The synchronous structure does not apply synchronous constraints to the deformable units on both sides during deployment; it only functions during containment. This invention achieves smooth and coordinated containment through a two-way mechanism of natural gravity synchronization during deployment and forced synchronization by the synchronous structure during containment, resulting in a simple and reliable structure.

Description

Technical Field

[0001] This invention relates to the field of transportation equipment technology, and specifically to a multi-state transportation device with a synchronous housing structure and its state transition method. Background Technology

[0002] With the increasing popularity of private cars and the rise in activities such as self-driving tours, outdoor camping, and large-scale shopping, users have placed higher demands on the efficient use of car trunk space and the convenience of cargo handling.

[0003] Traditional folding transport devices (such as folding handcarts and campervans) are often irregularly shaped when folded, with exposed wheels that cannot be stored within the device's outline, resulting in a large space occupation and an unsightly appearance when stored. Some products require users to disassemble the wheels for storage, which is cumbersome and leads to a poor user experience.

[0004] Deformable transport devices have emerged in the prior art. By incorporating deformable units that can unfold relative to the main structure, they form a transport configuration when unfolded and retract the wheel assembly within the device's outline when stored, thus achieving a transformation between the storage and transport configurations. These devices typically have deformable units symmetrically arranged on both sides of the main structure. When unfolded, both sides expand outwards simultaneously, and when stored, both sides retract inwards simultaneously.

[0005] However, the aforementioned deformable transport device still has the following problems during the containment process: First, there is a lack of a dedicated containment synchronization mechanism. During containment, the deformable units on the left and right sides move independently, requiring the user to operate both sides with their hands, which is difficult to operate and makes it hard to ensure coordination.

[0006] Second, although some devices are equipped with synchronization mechanisms, their structures are complex and contain many parts. For example, the use of gear synchronization mechanisms or linkage synchronization mechanisms increases manufacturing costs and assembly complexity, as well as the weight of the device.

[0007] Third, in scenarios requiring additional synchronous structural force for containment, a single synchronous mechanism is insufficient to simultaneously meet the needs of both deployment and containment. Deployment relies on gravity, and if the synchronous mechanism also applies constraints during deployment, it may lead to asynchrony due to friction or jamming. Containment relies on manual operation, requiring a synchronous mechanism to ensure coordination between the two sides.

[0008] Based on the above problems, there is an urgent need for a multi-state transport device with a simple and reliable containment synchronization mechanism, unrestricted deployment, and forced synchronization during containment. Summary of the Invention

[0009] I. The technical problem to be solved by the invention This invention aims to solve the following technical problems existing in the prior art: (1) The lack of a synchronous structure that can form motion coupling during the containment process, and the asynchronous left and right movements lead to jamming or tilting; (2) Existing synchronization mechanisms are complex in structure, have many parts, and are costly; (3) In scenarios where additional synchronous structures are required to apply force to achieve containment, a single synchronous mechanism is difficult to adapt to the different driving methods in both the deployment and containment directions; (4) The synchronization mechanism applies unnecessary constraints during the deployment process. Technical solution

[0010] To achieve the above objectives, the present invention adopts the following technical solution: A multi-state transport device with a synchronous containment structure includes: Main structure; Deformable units respectively disposed on both sides of the main structure; Movable support components are respectively associated with the deformable unit; And an additional synchronization structure for applying synchronous retraction drive to the deformable units on both sides during the containment process; in, The deformable unit is capable of moving relative to the main structure between a contained state and an expanded state. When transitioning from the extended state to the contained state, the synchronization structure applies a synchronous retraction drive to the deformable units on both sides in the direction of containment, forming a motion coupling and establishing a motion linkage retraction relationship between the deformable units on both sides, so that the deformable units on both sides are forced to be contained synchronously. This allows the movable support components on both sides to be synchronously retracted from the ground support position to the receiving position.

[0011] Furthermore, the deformable units on both sides are structurally symmetrically arranged and move synchronously under the influence of the structure and gravity. Under the influence of gravity, the deformable units on both sides naturally and synchronously unfold along their corresponding movement paths.

[0012] Furthermore, the synchronization structure is a connector, with its two ends connected to the left and right deformable units respectively. When the user applies a closing force to the connector, the two ends of the connector generate a synchronous closing drive for the deformable units on both sides, causing the deformable units on both sides to move synchronously in the receiving direction. The connector can be a flexible connector, a rigid connector, or other transmission structure capable of transmitting the synchronous closing drive.

[0013] Furthermore, the connector is a rope or strap, the middle of which can be held or pulled by the user. When the user pulls the middle of the rope or strap, both ends of the rope or strap simultaneously pull the deformable units on both sides toward the receiving direction.

[0014] Furthermore, a guide structure is provided on the main structure, and the synchronization structure passes through the guide structure. The guide structure is used to convert the lifting direction applied by the user into a closing force direction toward the deformable unit's receiving direction. By providing the guide structure, the user only needs to lift from above the main structure to drive the deformable unit to complete synchronous receiving, making the operation convenient.

[0015] Furthermore, the synchronous structure forms motion coupling during the containment process through changes in length, relative displacement, and / or force, and establishes a motion linkage and retraction relationship between the deformable units on both sides. During the deployment process, the synchronous structure does not impose synchronous constraints on the deformable units on both sides, allowing them to move freely. It is only used during containment to reduce the risk of jamming or tilting caused by one deformable unit being contained first while the other lags significantly behind.

[0016] Furthermore, the deformable unit is connected to the main structure via a hinged linkage mechanism, a sliding groove and pin mechanism, a scissor mechanism, or a sheet metal folding mechanism.

[0017] Furthermore, when the deformable unit transitions from the containment state to the expansion state, it is triggered by applying an upward lifting force to the main structure, causing the deformable units on both sides to begin moving under the action of gravity.

[0018] Furthermore, it also includes an enclosure component, which, in its extended state, is installed between the main structure and the deformable unit to form a load-bearing plane.

[0019] The present invention also provides a state transition method for a multi-state transport device with a synchronous containment structure. The transport device includes a main structure, deformable units respectively disposed on both sides of the main structure, movable support components respectively associated with the deformable units, and an additional synchronous structure, comprising the following steps: When transitioning from the extended state to the contained state, the synchronous structure applies a synchronous retraction drive towards the containing direction to the deformable units on both sides, forming a motion coupling and establishing a motion linkage retraction relationship between the deformable units on both sides, so that the deformable units on both sides are forced to be contained synchronously, and the moving support components on both sides are synchronously retracted from the ground support position to the containing position.

[0020] In this paper, "synchronous containment structure" refers to a structural mechanism in which an additional synchronization structure applies a synchronous retraction drive towards the containment direction to the deformable units on both sides during the containment process, forming motion coupling and establishing a motion linkage retraction relationship between the deformable units on both sides, thus forcing the deformable units on both sides to contain synchronously. The synchronization structure does not impose synchronous constraints on the deformable units on both sides during the deployment process, allowing the deformable units on both sides to move freely during deployment; it only functions during the containment process. The synchronization structure is set independently of the deformable unit body and only functions during the containment process. The core of this invention is to provide a mechanism for forcibly synchronously containing the units by applying a synchronous retraction drive through an additional synchronization structure during the containment process.

[0021] "Main structure" refers to the part that constitutes the main skeleton of the device, used to connect and support the deformable units and other components on the left and right sides.

[0022] A "deformable unit" refers to a functional unit that can move relative to the main structure and change its shape and / or spatial position during movement. Deformable units can be linkages, plate assemblies, scissor structures, or other mechanical structures capable of shape transformation. The deformable units on both sides are symmetrically arranged structurally and move synchronously under the influence of the structure and gravity.

[0023] "Mobile support assembly" refers to an assembly connected to a deformable unit for supporting and moving the device on the ground. Mobile support assemblies include, but are not limited to, casters, rollers, tracks, or other components that enable ground movement.

[0024] A "synchronization structure" refers to an additional structural component used to apply synchronized retraction drive to the deformable units on both sides during the containment process. The synchronization structure can be a connector with its two ends connected to the left and right deformable units respectively. The connector can be a flexible connector, a rigid connector, or other transmission structure capable of transmitting synchronized retraction drive. The synchronization structure does not apply synchronized constraints to the deformable units on both sides during deployment; it only functions during containment. The synchronization structure can be in a stressed state during containment and in a relaxed or non-driven state during deployment. The synchronization structure is not part of the deformable unit deployment drive structure; it only functions as an additional interventional synchronization control means during containment.

[0025] "Natural synchronization due to gravity" refers to the synchronous movement of the deformable unit structures on both sides during the unfolding process, under the influence of the structure and gravity, completing the unfolding along the corresponding movement path with a basically coordinated rhythm and amplitude. This synchronization is "passive synchronization," naturally guaranteed by physical laws, and does not require intervention from a synchronization structure.

[0026] "Forced synchronous containment" refers to applying a synchronous retraction drive towards the containment direction to the deformable units on both sides through an additional synchronization structure during the containment process. This creates motion coupling and establishes a motion linkage and retraction relationship between the deformable units on both sides, ensuring that both sides maintain linkage during the containment process and reducing the risk of losing synchronization. "Forced synchronous containment" does not mean that both sides arrive at their positions absolutely simultaneously, but rather that motion coupling keeps both sides linked during the containment process, ensuring the overall coordination of the containment process.

[0027] "Kinematic coupling" refers to the kinematic relationship formed between two deformable units during the containment process by changes in length, relative displacement, and / or force of a synchronous structure. The movement of one side is constrained or driven by the movement of the other. "Kinematic coupling" is the primary core term of this invention, and can be replaced with "synchronous kinematic association" as a supplementary expression in the specification. Kinematic coupling allows for a certain degree of freedom but maintains constant linkage, unlike rigid synchronization.

[0028] "Motion linkage and retraction relationship" refers to the motion association established between the deformable units on both sides by the synchronous structure through motion coupling during the retraction process. The motion state of one side affects the motion state of the other side through the synchronous structure, thereby ensuring that the two sides maintain coordinated motion during the retraction process.

[0029] "Synchronous retraction drive" refers to the driving force exerted by the synchronous structure on the deformable units on both sides, with the direction of retraction.

[0030] A "guide structure" refers to a structure installed on the main structure to allow the synchronization structure to pass through and to convert the lifting direction applied by the user into a closing force direction toward the deformable unit's receiving direction. The guide structure can take the form of a guide hole, guide groove, pulley, or other structure capable of changing the direction of the applied force. By installing a guide structure, the user only needs to lift from above the main structure to drive the deformable unit to complete synchronous receiving, making operation convenient.

[0031] "Containment state" refers to the state in which the deformable units are folded into or inside the main structure, and the overall outline of the device is compact and regular.

[0032] "Extended state" refers to the state in which the deformable unit unfolds relative to the main structure, and the movable support component moves to the outside of the main structure and contacts the ground to support the main structure leaving the ground. Beneficial effects

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] This invention employs different synchronization strategies to address the different driving characteristics in the deployment and containment directions. During deployment, natural synchronization is utilized through gravity—the deformable unit structures on both sides are symmetrical and move synchronously under the influence of the structure and gravity, naturally and synchronously deploying along their corresponding movement paths. The synchronization structure imposes no constraints, allowing the deformable units on both sides to move freely. During containment, forced synchronization is achieved using an additional synchronization structure—the synchronization structure applies a synchronous retraction drive towards the containment direction to the deformable units on both sides, forming motion coupling and establishing a motion-linked retraction relationship, ensuring that both sides remain linked during containment. The two mechanisms have clear divisions of labor and each performs its specific function. The synchronization structure is independent of the deformable unit body and only functions during containment. The synchronization structure is not part of the deformable unit deployment drive structure; it only functions as an additional interventional synchronization control means during containment.

[0035] The synchronization structure can be implemented using a single connector, with both ends connected to the left and right deformable units respectively. The structure is extremely simple, with few parts, low manufacturing cost, and low susceptibility to mechanical failure. The connector can be a flexible connector (such as a rope or strap), a rigid connector (such as a rod or chain), or other transmission structures. The force transmission method of the connector is not limited to tension transmission; it can also be thrust transmission or other motion-related transmission methods. Compared with traditional solutions such as gear synchronization mechanisms and linkage synchronization mechanisms, this invention has significant advantages in terms of cost, weight, and reliability.

[0036] The synchronous structure does not impose synchronous constraints on the deformable units on both sides during deployment, allowing them to move freely and avoiding frictional resistance or jamming that may occur with traditional synchronous mechanisms. The synchronous structure only functions during the retraction process, forming motion coupling and establishing a motion-linked retraction relationship to ensure a smooth and coordinated retraction process. The synchronous structure can be in a stressed state during retraction and in a relaxed or non-driven state during deployment, thus creating different stages of synchronous control strategies in both directions. This asymmetrical design of "free deployment, constrained retraction" precisely adapts to the motion requirements in different directions, avoiding unnecessary frictional resistance generated during deployment by traditional synchronous mechanisms.

[0037] During the containment process, the synchronous structure establishes a kinematic linkage between the deformable units on both sides through motion coupling, ensuring coordinated movement of the deformable units and reducing the risk of jamming or tilting caused by one side containing first while the other lags significantly. When one deformable unit experiences significant frictional resistance, the synchronous structure can create a linkage constraint on the movement of the other side, thereby assisting the side with greater resistance to complete containment and improving the overall stability of the containment process.

[0038] The synchronization mechanism of this invention does not depend on the specific motion mechanism between the deformable unit and the main structure. Hinged linkage mechanisms, sliding groove and pin mechanisms, scissor mechanisms, sheet metal folding mechanisms, etc., can all be used in conjunction with the synchronization structure of this invention.

[0039] The main structure features a guide structure, through which the synchronous structure connects to the deformable unit. The user simply pulls from above the main structure, and the guide structure converts the pulling direction into a retractable force direction towards the deformable unit's receiving direction, ensuring the retractable force acts on the deformable unit in a direction suitable for its receiving motion. This eliminates the need for the user to bend over or operate from the bottom of the device, making operation convenient. Attached Figure Description

[0040] Figure 1 This is a three-dimensional schematic diagram of the containment structure according to Embodiment 1 of the present invention.

[0041] Figure 2 This is a three-dimensional schematic diagram of the extended state structure of Embodiment 1 of the present invention.

[0042] Figure 3 This is a schematic diagram of the containment process and synchronous structure connection in Embodiment 1 of the present invention.

[0043] Figure 4 This is a three-dimensional schematic diagram of the containment structure in Embodiment 2 of the present invention.

[0044] Figure 5 This is a schematic diagram of the synchronous structure connection in Embodiment 2 of the present invention.

[0045] Figure 6 This is a three-dimensional schematic diagram of the extended state structure of Embodiment 3 of the present invention.

[0046] Figure 7 This is a schematic diagram of the extended state three-dimensional connection of Embodiment 3 of the present invention. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the scope of protection of the invention.

[0048] In the following description, directional terms such as "up," "down," "left," "right," "inner," "outer," "front," and "back" are used for ease of understanding and explanation. These directional terms are used only based on the orientation shown in the accompanying drawings and do not constitute a limitation on the scope of protection of this invention.

[0049] It should be noted that the following three embodiments illustrate different motion mechanism forms between the deformable unit and the main structure. Embodiment 1 uses a hinged linkage mechanism, Embodiment 2 uses a sliding groove and pin mechanism, and Embodiment 3 uses a scissor mechanism. All three mechanisms can cooperate with the synchronization structure of the present invention to achieve the functions of natural gravity synchronization during deployment and forced synchronization by the synchronization structure during retraction. The scope of protection of the present invention is not limited to any specific form.

[0050] Example 1: Hinged Linkage Mechanism and Synchronous Reception Structure like Figures 1 to 3 As shown, this embodiment provides a multi-state transport device with a synchronous containment structure.

[0051] The device includes a main structure 100, deformable units 200 arranged symmetrically on the left and right, a movable support assembly 300 connected to the deformable units 200, and an additional synchronization structure 400 for applying synchronous retraction drive to the deformable units 200 on both sides during the containment process.

[0052] The main structure 100 constitutes the central skeleton of the device, and its overall structure can be a frame, plate, or box. A handle may be provided on the upper part of the main structure 100 to facilitate the user to apply lifting force.

[0053] The deformable unit 200 adopts a multi-link structure. Taking the right side as an example (the left side is mirror-symmetrical), the deformable unit 200 includes at least one set of links. One end of the link is hinged to the main structure 100, and the other end is hinged to the main body of the deformable unit 200, forming a hinged link mechanism.

[0054] The movable support assembly 300 is fixedly connected to the lower end of the deformable unit 200. The movable support assembly 300 is a caster assembly, including swivel wheels and / or fixed wheels.

[0055] The deformable units 200 on the left and right sides are symmetrically arranged in the structure and move synchronously under the action of the structure and gravity.

[0056] like Figure 3 As shown, the synchronization structure 400 is a connector, specifically a rope in this embodiment. A guide hole 101 is symmetrically located on each side of the main structure 100. The middle portion of the rope passes through the two guide holes 101, allowing the user to hold or pull it from above the main structure 100. The two ends of the rope exit through their respective guide holes 101 and connect to the deformable unit 200 on the corresponding side.

[0057] In the deployed state, the rope is slack and does not apply synchronous constraints to the deformable units 200 on both sides. The guide hole 101 is used to convert the lifting direction applied by the user into the direction of the closing force towards the receiving direction of the deformable unit 200.

[0058] like Figure 2 As shown, when a user wishes to change the device from its concealed state to its expanded state, the unfolding process is as follows: The user applies an upward lifting force to the main structure 100. The deformable units 200 on both sides begin to move relative to the main structure 100 under their own gravity. Because the deformable units 200 on both sides are structurally symmetrical and move synchronously under the influence of the structure and gravity, the gravitational driving forces on both sides correspond. The two sides move synchronously along corresponding motion paths. Therefore, the deformable units 200 on both sides unfold under the influence of gravity with a basically coordinated rhythm and amplitude of movement, achieving natural synchronization.

[0059] During this process, the ropes are in a slack state, the synchronization structure is in a non-driven state, and no synchronization constraints are applied to the deformable units 200 on both sides, allowing the deformable units 200 on both sides to move freely during deployment. Deployment is entirely driven by gravity and is free and smooth.

[0060] Once deployed, the two movable support components 300 simultaneously contact the ground and support the main structure 100 as it lifts off the ground. The device then enters its extended state.

[0061] like Figure 3 As shown, when a user wishes to change the device from an extended state to a contained state, the containment process is as follows: The user holds the middle of the rope above the main structure 100 and pulls upwards. Guided by the guide hole 101, the rope converts the vertical pulling force applied by the user into a contracting force towards the receiving direction of the deformable unit 200. Simultaneously, both ends of the rope apply a synchronized contracting drive towards the receiving direction to the left and right deformable units 200. The rope's length change creates motion coupling, establishing a coordinated contracting relationship between the two deformable units 200. Each deformable unit 200 receives a corresponding contracting force, moving towards the receiving direction with a coordinated rhythm.

[0062] If one deformable unit 200 lags behind in movement due to greater frictional resistance, the rope will create a linkage constraint on the movement of the other side. Through the linkage and retraction relationship, the side with greater resistance is assisted in completing the containment, reducing the risk of jamming or tilting caused by one side being contained first while the other side lags significantly behind, and ensuring that both sides eventually reach the containment position in a coordinated manner.

[0063] After containment is completed, the mobile support assembly 300 is retracted to the periphery or interior of the main structure 100. The device returns to its contained state (e.g., Figure 1 (As shown).

[0064] The synchronization structure 400 in this embodiment adopts an asymmetrical design of "free deployment and constrained retraction". During deployment, the rope is in a slack state, the synchronization structure is in a non-driven state, and no synchronization constraint is applied to the deformable units 200 on both sides, allowing them to move freely. During retraction, the rope is pulled and tightened, the synchronization structure is under force, and a synchronous retraction drive is applied in the retraction direction, forming a synchronous motion association. This asymmetrical design precisely adapts to the different driving force characteristics in the two directions of deployment and retraction, forming a synchronization control strategy for different stages.

[0065] Example 2: Slide and Pin Mechanism and Synchronous Reception Structure like Figure 4 and Figure 5 As shown, the main difference between this embodiment and Embodiment 1 is that the deformable unit 200 and the main structure 100 are connected by a sliding groove and pin mechanism. The synchronous housing mechanism is the same as in Embodiment 1.

[0066] The main structure 100 is provided with a guide groove. The trajectory of the guide groove defines the movement path of the deformable unit 200. The deformable unit 200 is provided with a pin that mates with the guide groove. The pin is slidably embedded in the guide groove.

[0067] The guide grooves on the left and right sides are set accordingly. The deformable units 200 on the left and right sides are structurally symmetrical and move synchronously under the action of the structure and gravity.

[0068] like Figure 5 As shown, the synchronization structure 400 is a rope. A guide hole 101 is symmetrically located on each side of the main structure 100. The middle of the rope passes through the two guide holes 101, allowing the user to hold or pull it from above the main structure 100. The two ends of the rope pass through their respective guide holes 101 and connect to the deformable unit 200 on the corresponding side.

[0069] In the deployed state, the rope is slack and does not apply synchronous constraints to the deformable units 200 on both sides. The guide hole 101 is used to convert the lifting direction applied by the user into the direction of the closing force towards the receiving direction of the deformable unit 200.

[0070] During deployment, the user lifts the main structure 100, and the deformable units 200 on both sides move along their respective guide slots under the influence of gravity. Due to the symmetry of the two sides, their synchronous movement under the influence of the structure and gravity, and the corresponding arrangement of the guide slots, the deformable units 200 on both sides naturally and synchronously deploy under gravity. The ropes are in a slack state and do not participate in the synchronous control.

[0071] During containment, the user pulls the middle of the rope above the main structure 100. Under the action of the guide hole 101, the rope converts the pulling force into a contracting force in the containment direction of the deformable unit 200. The two ends of the rope apply synchronous contraction drive in the containment direction to the deformable units 200 on both sides. Through the change of length, motion coupling is formed, and synchronous contraction association is established, so that the two sides are contained in a coordinated manner.

[0072] This embodiment demonstrates that the synchronous housing structure can be used in conjunction with the slide and pin mechanism. Regardless of the motion mechanism used between the deformable unit and the main structure, as long as the two sides of the structure are symmetrical and move synchronously under the action of the structure and gravity, the unfolding can be achieved by relying on gravity to achieve natural synchronization; during housing, the synchronous structure applies a synchronous closing drive in the housing direction, forming motion coupling and establishing a motion linkage closing relationship to achieve coordinated housing.

[0073] The key feature of the synchronization structure of this invention is that it forms motion coupling through an additional synchronization structure, without relying on the deformable unit's own structure to achieve synchronous containment.

[0074] Example 3: Scissor lift mechanism and synchronous housing structure like Figure 6 and Figure 7 As shown, this embodiment provides a multi-state transport device with a synchronous containment structure, wherein the deformable unit and the main structure are connected by a scissor mechanism.

[0075] The device includes a main structure 100, deformable units 200 arranged symmetrically on the left and right, a movable support assembly 300 connected to the deformable units 200, and an additional synchronization structure 400 for applying synchronous retraction drive to the deformable units 200 on both sides during the containment process.

[0076] The deformable unit 200 employs a scissor mechanism. Taking the right side as an example (the left side is mirror-symmetrical), the deformable unit 200 includes a first scissor bar 250 and a second scissor bar 260. The first scissor bar 250 and the second scissor bar 260 are cross-hinged in the middle region by a cross hinge 251, forming an X-shaped scissor structure. The lower end of the first scissor bar 250 is hinged to the main structure 100. The upper end of the second scissor bar 260 is slidably connected to the main structure 100, and the lower end is connected to the movable support assembly 300.

[0077] The movable support assembly 300 is a caster assembly. In the deployed state, the scissor mechanism extends, and the movable support assembly 300 touches the ground to support the main structure 100 off the ground. In the retracted state, the scissor mechanism retracts, and the movable support assembly 300 retracts inward and upward to the periphery of the main structure 100.

[0078] like Figure 7As shown, the synchronization structure 400 is a rope. A guide hole 101 is symmetrically located on each side of the main structure 100. The middle of the rope passes through the two guide holes 101, allowing the user to hold or pull it from above the main structure 100. The two ends of the rope pass through their respective guide holes 101 and connect to the cross hinge 251 of the scissor mechanism on the corresponding side.

[0079] In the deployed state, the rope is slack and no synchronous constraint is applied to the deformable units 200 on both sides. The guide hole 101 is used to convert the lifting direction applied by the user into the direction of the closing force towards the receiving direction of the cross hinge 251.

[0080] When the user wishes to change the device from the contained state to the extended state, forces are applied to the variable units. The scissor mechanisms on both sides expand under the force, and the movable support assembly 300 extends accordingly. The movable support assembly 300 moves outward and downward, contacts the ground, and supports the main structure 100 to lift off the ground.

[0081] During this process, the rope is in a slack state, and the synchronization structure is in a non-driven state and does not participate in the unfolding motion.

[0082] like Figure 7 As shown, when a user wishes to change the device from an extended state to a contained state, the containment process is as follows: The user holds the middle of the rope above the main structure 100 and pulls upwards. The rope, guided by the guide hole 101, converts the vertical pulling force applied by the user into a retracting force pointing from the guide hole 101 towards the cross hinge 251. Simultaneously, both ends of the rope apply a synchronous retracting drive towards the receiving direction to the cross hinge 251 of both the left and right scissor mechanisms.

[0083] Under the action of the retraction force, the cross hinge 251 of the two scissor lift mechanisms is pulled inward synchronously, and the first scissor lift 250 and the second scissor lift 260 rotate relative to each other around the cross hinge 251, causing the scissor lift mechanism to retract. The movable support assembly 300 moves inward and upward as the scissor lift mechanism retracts, realizing the inward movement and upward tilting of the casters, and finally retracts to the storage position around the main structure 100.

[0084] The rope creates motion coupling through changes in length, establishing a kinematic linkage between the two scissor lift mechanisms. If one scissor lift mechanism retracts slowly due to greater frictional resistance, the rope will create a linkage constraint on the movement of the other side, assisting the side with greater resistance to complete the retraction. This reduces the risk of jamming or tilting caused by one side retracting first while the other side lags significantly, ensuring that both sides ultimately reach the retraction position in a coordinated manner.

[0085] The device is restored to its containment state (e.g.) Figure 6 (As shown).

[0086] In this embodiment, the scissor lift mechanism requires a horizontal force to pull the cross hinge 251 inward. If the user pulls the rope directly from below or the side, the operation is inconvenient. By passing the rope through guide holes 101 on both sides of the main structure 100, the user can vertically pull the rope from above the main structure 100. The guide holes 101 then change the pulling direction to point towards the cross hinge 251, causing the closing force to act on the cross hinge 251 of the scissor lift mechanism in a direction suitable for the retrieval movement. This design allows the user to efficiently drive the scissor lift mechanisms on both sides to retrieve synchronously with a simple pulling operation from above the main structure, making operation extremely convenient.

[0087] The three embodiments above illustrate different forms of motion mechanisms between the deformable unit and the main structure. A common feature of all embodiments is that: (1) When unfolded, the deformable units on both sides unfold naturally and synchronously under the action of gravity. The synchronous structure is in a non-driven state, without synchronous constraints, and is allowed to move freely. (2) During the containment process, the synchronous structure is under stress and applies a synchronous retraction drive towards the containment direction to the deformable units on both sides, forming a synchronous motion association so that the two sides can be contained in a coordinated manner. (3) All synchronous structures are connected by a single connector, with the left and right deformable units connected to both ends respectively, resulting in a simple structure; (4) The main structure is equipped with a guide structure to convert the lifting direction applied by the user into the direction of the closing force towards the receiving direction.

[0088] These common features are precisely the embodiment of the core inventive concept of the "synchronous containment structure" of this invention. Those skilled in the art should understand that, in addition to hinged linkage mechanisms, sliding and pin mechanisms, and scissor mechanisms, other mechanism forms such as sheet metal folding mechanisms can also be used in conjunction with the synchronous structure of this invention. Besides ropes, the synchronous structure can also employ rigid tie rods, chains, synchronous belts, elastic belts, flexible sheets, or steel wires, etc., which can transmit synchronous retraction and closing drives. The force transmission method of the connecting parts is not limited to tension transmission; it can also be thrust transmission or other motion-related transmission methods. In other embodiments, the synchronous structure can also form motion coupling through displacement correlation between rigid rods. The specific form of the guiding structure is not limited to guide holes; it can also be guide grooves, pulleys, or other structures that can change the direction of force application. The synchronous structure can be in a stressed state during containment and in a relaxed or non-driven state during unfolding, thereby forming a synchronous control strategy at different stages in both unfolding and containment directions. These alternative solutions are all within the scope of protection of this invention.

[0089] It should be noted that the core of this invention lies in providing a mechanism for forced synchronous containment by applying synchronous closing drive through an additional synchronization structure during the containment process. This patent primarily addresses scenarios where containment requires the application of force through an additional synchronization structure. Containment solutions that achieve containment through other means without relying on an additional synchronization structure are not the primary technical scenarios addressed by this invention.

[0090] The core of the state transition method provided by this invention lies in: during containment, a synchronization structure is used to force synchronization, and the synchronization structure is in a state of being under force, thus forming a synchronous motion association.

[0091] Deployment direction: The user lifts the main structure, and the deformable units on both sides automatically begin to move under the influence of gravity. Due to the structural symmetry and synchronous movement under the influence of the structure and gravity, the two sides naturally and synchronously deploy outwards. During deployment, the synchronous structure does not apply synchronous constraints to the deformable units on both sides. The moving support components on both sides land synchronously.

[0092] Retraction Direction: The user pulls the rope in the middle of the synchronization structure. The rope passes through a guide structure set on the main structure, which converts the pulling direction into a retracting force direction toward the retraction direction of the deformable unit. The synchronization structure applies a synchronous retraction drive toward the retraction direction to the deformable units on both sides, forming a synchronous motion association, enabling coordinated retraction on both sides. The moving support components on both sides retract synchronously.

[0093] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, shall still fall within the protection scope of the present invention.

Claims

1. A multi-state transport device with a synchronous containment structure, characterized in that, include: Main structure; Deformable units respectively disposed on both sides of the main structure; Movable support components are respectively associated with the deformable unit; And an additional synchronization structure for applying synchronous retraction drive to the deformable units on both sides during the containment process; in, The deformable unit is capable of moving relative to the main structure between a contained state and an expanded state. When transitioning from the extended state to the contained state, the synchronization structure applies a synchronous retraction drive to the deformable units on both sides in the direction of containment, forming a motion coupling and establishing a motion linkage retraction relationship between the deformable units on both sides, so that the deformable units on both sides are forced to be contained synchronously. This allows the movable support components on both sides to be synchronously retracted from the ground support position to the receiving position.

2. The multi-state transport device with a synchronous containment structure according to claim 1, characterized in that: The deformable units on both sides are symmetrically arranged in the structure and move synchronously under the action of the structure and gravity; Under the influence of gravity, the deformable units on both sides naturally and synchronously unfold along their corresponding motion paths.

3. A multi-state transport device with a synchronous containment structure according to claim 1, characterized in that: The synchronization structure is a connector, and the two ends of the connector are respectively connected to the left and right deformable units; When the user applies a closing force to the connector, the two ends of the connector drive the deformable units on both sides to close synchronously, causing the deformable units on both sides to move synchronously in the receiving direction.

4. A multi-state transport device with a synchronous containment structure according to claim 3, characterized in that: The connector is a rope or strap, the middle of which can be held or pulled by the user; When the user pulls the middle of the rope or strap, both ends of the rope or strap simultaneously pull the deformable units on both sides toward the direction of retraction.

5. A multi-state transport device with a synchronous containment structure according to claim 4, characterized in that: The main structure is provided with a guide structure, and the synchronization structure passes through the guide structure; The guide structure is used to convert the lifting direction applied by the user into the direction of the closing force toward the direction of the deformable unit's containment.

6. A multi-state transport device with a synchronous containment structure according to claim 3, characterized in that: During the containment process, the synchronous structure forms motion coupling through length changes and / or relative displacement changes, and establishes a motion linkage and retraction relationship between the deformable units on both sides. The synchronous structure does not apply synchronous constraints to the deformable units on both sides during the deployment process, allowing the deformable units on both sides to move freely during the deployment process. It is only used during the containment process to reduce the risk of jamming or tilting caused by one side of the deformable unit being contained first while the other side is significantly lagging behind.

7. A multi-state transport device with a synchronous containment structure according to claim 1, characterized in that: The deformable unit is connected to the main structure via a hinged linkage mechanism, a sliding groove and pin mechanism, a scissor mechanism, or a sheet metal folding mechanism.

8. A multi-state transport device with a synchronous containment structure according to claim 1, characterized in that: When the deformable unit transitions from the contained state to the expanded state, it is triggered by applying an upward lifting force to the main structure, causing the deformable units on both sides to begin moving under the action of gravity.

9. A multi-state transport device with a synchronous containment structure according to claim 1, characterized in that: It also includes an enclosure component, which, in its extended state, is installed between the main structure and the deformable unit to form a load-bearing plane.

10. A state transition method for a multi-state transport device with a synchronous containment structure, the transport device comprising a main structure, deformable units respectively disposed on both sides of the main structure, movable support components respectively associated with the deformable units, and an additional synchronous structure, characterized in that, Includes the following steps: When transitioning from the extended state to the contained state, the synchronous structure applies a synchronous retraction drive towards the containing direction to the deformable units on both sides, forming a motion coupling and establishing a motion linkage retraction relationship between the deformable units on both sides, so that the deformable units on both sides are forced to be contained synchronously, and the moving support components on both sides are synchronously retracted from the ground support position to the containing position.

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