One-way unlocking structure, vehicle door assembly and vehicle

Abstract

This utility model relates to the field of vehicle engineering technology, and provides a one-way unlocking structure, a door assembly, and a vehicle. A first link, a second link, and a fourth link are coaxially hinged to the sliding door. One end of the first link triggers the lock assembly, and the other end has a first groove. The second link has a second groove A and a second groove B, which communicate with each other. One end of a first pin is slidably inserted into the first groove. When the other end of the first pin is slidably inserted into the second groove A, the first and second links can move relative to each other. When the other end of the first pin is slidably inserted into the second groove B, the first and second links move synchronously. The third link can push the first pin into the second groove A. During the rotation of the fourth link, it can first drive the second link to rotate, and then drive the third link to rotate. This design simplifies the user's door opening process and reduces the number of openings in the sliding door.

Description

Technical Field

[0001] This utility model relates to the field of vehicle engineering technology, and in particular to a one-way unlocking structure, a door assembly, and a vehicle. Background Technology

[0002] Currently, the locking systems used on MVP sliding doors typically employ a pendulum-style two-way operating handle with a central locking knob. Once the central locking is engaged, pulling the inward release handle will not disengage the central locking system. The central locking knob must be manually turned or the central locking system can be electrically unlocked before pulling the inward release handle can unlock and open the door.

[0003] The user experience is relatively complicated when opening the door.

[0004] Therefore, there is an urgent need for a one-way unlocking structure, door assembly, and vehicle to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to propose a one-way unlocking structure, a door assembly, and a vehicle, which simplifies the user's door opening process and reduces the number of openings in the sliding door.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] One-way unlocking structure, including:

[0008] First pin;

[0009] The linkage assembly includes a first link, a second link, a third link, and a fourth link. The first link, the second link, and the fourth link are coaxially hinged to the sliding door. One end of the first link is used to trigger the lock assembly, and the other end has a first sliding groove. The second link has a second sliding groove A and a second sliding groove B, which communicate with each other. One end of the first pin is slidably inserted into the first sliding groove. When the other end of the first pin is slidably inserted into the second sliding groove A, the first link and the second link can move relative to each other. When the other end of the first pin is slidably inserted into the second sliding groove B, the first link and the second link move synchronously. The third link can push the first pin into the second sliding groove A. During the rotation of the fourth link, it can first drive the second link to rotate, and then drive the third link to rotate.

[0010] As a preferred technical solution of the above-mentioned one-way unlocking structure, it also includes a first elastic element, which makes the first pin always tend to move into the second slide groove B.

[0011] As a preferred technical solution of the above-mentioned one-way unlocking structure, it also includes a second elastic element, which is used to drive the fourth link to reset.

[0012] As a preferred technical solution of the above-mentioned one-way unlocking structure, it also includes a second pin, the second link has a second groove C, one end of the second pin is inserted into the second groove C, and the fourth link drives the second link through the second pin.

[0013] As a preferred technical solution of the above-mentioned one-way unlocking structure, the third link is provided with a third sliding groove, the third sliding groove is arc-shaped, and its center coincides with the rotation axis of the third link. The fourth link is equipped with a third pin, which is slidably inserted into the third sliding groove.

[0014] As a preferred technical solution of the above-mentioned one-way unlocking structure, it also includes a first handle, which is movably installed on the inside of the sliding door and is connected to the fourth link via a first pull line.

[0015] As a preferred technical solution of the above-mentioned one-way unlocking structure, it also includes a second handle and a fifth link. The second handle is movably installed on the outside of the sliding door, and the fifth link is movably installed on the sliding door. The second handle is connected to the fifth link through a second pull cable, and the fifth link can drive the first link to rotate.

[0016] A door assembly is also provided, including the aforementioned sliding door, the aforementioned lock assembly, and the aforementioned one-way unlocking structure. The lock assembly is installed on the aforementioned sliding door for locking the sliding door and the vehicle frame. The one-way unlocking structure is installed on the aforementioned sliding door for triggering the aforementioned lock assembly to unlock the locking of the sliding door and the aforementioned vehicle frame.

[0017] As a preferred technical solution for the aforementioned door assembly, the aforementioned lock assembly includes a first lock and a second lock. The first lock is installed on the front side of the aforementioned sliding door, and the second lock is installed on the rear side of the aforementioned sliding door. The first lock is connected to the aforementioned first link via a third pull cable A, and the second lock is connected to the aforementioned first link via a third pull cable B.

[0018] A vehicle is also provided, including the aforementioned vehicle frame and the aforementioned door assembly.

[0019] The beneficial effects of this utility model are:

[0020] This utility model provides a one-way unlocking structure, a door assembly, and a vehicle. The one-way unlocking structure includes a first pin and a linkage assembly. The linkage assembly includes a first link, a second link, a third link, and a fourth link, which are coaxially hinged to the sliding door. One end of the first link triggers the lock assembly, and the other end has a first groove. The second link has a second groove A and a second groove B, which communicate with each other. One end of the first pin is slidably inserted into the first groove. When the other end of the first pin is slidably inserted into the second groove A, the first and second links can move relative to each other. When the other end of the first pin is slidably inserted into the second groove B, the first and second links move synchronously. The third link can push the first pin into the second groove A. During the rotation of the fourth link, it can first drive the second link to rotate, and then drive the third link to rotate.

[0021] For example, the one-way unlocking structure includes an unlockable state, an unlockable state, and an unlocked state. When the one-way unlocking structure is in the unlockable state, the first link is in the first initial position, the second link is in the second initial position, the third link is in the third end position, and the fourth link is in the fourth initial position. The third link pushes the first pin into the second slide groove B. At this time, since the second link cannot drive the first link through the first pin, even if the user drives the third link, it cannot be transmitted to the first link.

[0022] The one-way unlocking mechanism switches from an unlockable state to an unlockable state. At this time, the fourth link is driven, moving from the fourth initial position to the fourth final position. First, the first process is executed: the fourth link drives the second link to move from the second initial position to the second final position. During this process, the first pin moves relative to the second link, sliding into the second slide groove A at the intersection of the second slide groove A and the second slide groove B. The first pin is supported by one side wall of the second slide groove A. Then, the second process begins: the fourth link can rotate simultaneously against the second and third links. The second link continues to move towards the second final position, and the third... The connecting rod can move from the third end position to the third initial position to release the third connecting rod's restriction on the first pin. When the first slide groove and the second slide groove B coincide, the first pin can be inserted between the first slide groove and the second slide groove B. Thus, the second connecting rod can drive the first connecting rod. During this process, since the fourth connecting rod first drives the second connecting rod to move, the first pin moves away from the boundary between the second slide groove A and the second slide groove B, and then drives the third connecting rod to move. The third connecting rod moves from the third end position to the third initial position, which can prevent the first pin from sliding directly into the second slide groove B, causing the unlocking action to be performed directly in the unlockable state. Subsequently, the second connecting rod returns to the second initial position, and the fourth connecting rod returns to the fourth initial position. At this time, the first slide groove and the second slide groove B are aligned, and the first pin slides into the second slide groove B.

[0023] The one-way unlocking mechanism switches from the unlockable state to the unlocked state, driving the fourth link again. This causes the fourth link to move from the fourth initial position to the fourth end position. The fourth link, through the second link, drives the first link to rotate. The first link moves from the first initial position to the first end position, triggering the lock assembly and completing the unlocking process.

[0024] This design simplifies the user's door opening process and reduces the number of openings required for the sliding door. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the one-way unlocking structure provided in this embodiment of the utility model. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the one-way unlocking structure provided in this embodiment of the utility model. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of the one-way unlocking structure (unlockable state) provided in this embodiment of the utility model. Figure 1 ;

[0029] Figure 4 This is a schematic diagram of the one-way unlocking structure (unlockable state) provided in this embodiment of the utility model. Figure 2 ;

[0030] Figure 5 This is a schematic diagram of the one-way unlocking structure (unlockable state) provided in this embodiment of the utility model. Figure 3 ;

[0031] Figure 6 This is a schematic diagram of the one-way unlocking structure (unlockable state) provided in this embodiment of the utility model. Figure 4 ;

[0032] Figure 7 This is a schematic diagram of the one-way unlocking structure (unlockable state) provided in this embodiment of the utility model. Figure 1 ;

[0033] Figure 8 This is a schematic diagram of the one-way unlocking structure (unlockable state) provided in this embodiment of the utility model. Figure 1 ;

[0034] Figure 9 This is a schematic diagram of the one-way unlocking structure (unlocked state) provided in this embodiment of the utility model. Figure 1 ;

[0035] Figure 10 This is a schematic diagram of the one-way unlocking structure (unlocked state) provided in this embodiment of the utility model. Figure 2 .

[0036] In the picture:

[0037] 110. First pin; 120. Second pin;

[0038] 210, First Link; 220, Second Link; 230, Third Link; 240, Fourth Link; 250, Fifth Link;

[0039] 310. First elastic element; 320. Second elastic element;

[0040] 400. First pull line;

[0041] 510. First hinge shaft; 520. Second hinge shaft;

[0042] 600. Actuator. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0044] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0047] like Figures 1 to 10 As shown, this utility model provides a one-way unlocking structure, including a first pin 110 and a linkage assembly. The linkage assembly includes a first linkage 210, a second linkage 220, a third linkage 230, and a fourth linkage 240. The first linkage 210, second linkage 220, and fourth linkage 240 are coaxially hinged to the sliding door. One end of the first linkage 210 is used to trigger the lock assembly, and the other end has a first sliding groove. The second linkage 220 has a second sliding groove A and a second sliding groove B, which communicate with each other. One end of the first pin 110 is slidably inserted into the first sliding groove. When the other end of the first pin 110 is slidably inserted into the second slide groove A, the first connecting rod 210 and the second connecting rod 220 can move relative to each other. When the other end of the first pin 110 is slidably inserted into the second slide groove B, the first connecting rod 210 and the second connecting rod 220 move synchronously. The third connecting rod 230 can push the first pin 110 into the second slide groove A. During the rotation of the fourth connecting rod 240, it can first drive the second connecting rod 220 to rotate, and then drive the third connecting rod 230 to rotate.

[0048] For example, the first link 210, the second link 220 and the fourth link 240 are all rotatably connected to the sliding door through the first hinge shaft 510, and the third link 230 is rotatably connected to the sliding door through the second hinge shaft 520.

[0049] For example, the first link 210 has a first initial position and a first final position relative to the sliding door. The first link 210 switches between the first initial position and the first final position by rotating with the sliding door. When the first link 210 rotates to the first final position, the first link 210 can trigger the locking assembly, causing the locking assembly to release the locking between the sliding door and the vehicle frame, thereby realizing the door opening action. The first link 210 has a first sliding groove. The length direction of the first sliding groove is parallel to the radial direction of the first hinge shaft 510, and the depth direction of the first sliding groove is parallel to the axial direction of the first hinge shaft 510.

[0050] For example, the second link 220 has a second initial position and a second final position relative to the sliding door. The second link 220 switches between the second initial position and the second final position by rotating with the sliding door. The second link 220 has a second slide groove A and a second slide groove B. The second slide groove A is arc-shaped with the axis of the first hinge shaft 510 as the center. The length direction of the second slide groove B is parallel to the radial direction of the first hinge shaft 510. The depth directions of the second slide groove A and the second slide groove B are both parallel to the axial direction of the first hinge shaft 510, and the second slide groove A and the second slide groove B are connected.

[0051] The first link 210 and the second link 220 are connected by a first pin 110. One end of the first pin 110 is inserted into the first groove and can slide relative to the first link 210 along the length of the first groove. The other end of the first pin 110 is inserted into the second groove A or the second groove B. If the first pin 110 is inserted into the second groove A, the first link 210 and the second link 220 can move relative to each other. That is, when the second link 220 rotates from the second initial position to the second end position, the first pin 110 moves relative to the second link 220 in the second groove A, and the first link 210 is always in the first initial position. If the first pin 110 is inserted into the second groove B, the first link 210 and the second link 220 rotate together. That is, when the second link 220 rotates from the second initial position to the second end position, the first pin 110 can drive the first link 210 to move from the first initial position to the first end position to unlock.

[0052] For example, the third link 230 is rotatably connected to the sliding door via the second hinge shaft 520. The third link 230 has a third initial position and a third final position relative to the sliding door, and the third link 230 switches between the third initial position and the third final position by relative rotation with the sliding door. The third link 230 abuts against the first pin 110. When the third link 230 moves from the third initial position to the third final position, the third link 230 can push the first pin 110 from the second slide rail B into the second slide rail A.

[0053] For example, the fourth link 240 is rotatably connected to the sliding door via the first hinge shaft 510. The fourth link 240 has a fourth initial position and a fourth final position relative to the sliding door, and switches between the fourth initial position and the fourth final position through relative rotation with the sliding door. The fourth link 240 is connected to the second link 220 and the fourth link 240. When the fourth link 240 moves from the fourth initial position to the fourth final position, the movement stroke is divided into a first stroke and a second stroke in time sequence. During the first stroke, the fourth link 240 can drive the second link 220, causing the second link 220 to move from the second initial position to the second final position, while the third link 230 is in the third initial position. During the second stroke, the fourth link 240 can drive the third link 230, causing the third link 230 to move from the third final position to the third initial position. The fourth link 240 can also drive the second link 220.

[0054] For example, the one-way unlocking structure includes an unlockable state, an unlockable state, and an unlocked state. When the one-way unlocking structure is in the unlockable state, the first link 210 is in the first initial position, the second link 220 is in the second initial position, the third link 230 is in the third end position, and the fourth link 240 is in the fourth initial position. The third link 230 pushes the first pin 110 into the second slide groove B. At this time, since the second link 220 cannot drive the first link 210 through the first pin 110, even if the user drives the third link 230, it cannot be transmitted to the first link 210.

[0055] When the one-way unlocking mechanism switches from an unlockable state to an unlockable state, it drives the fourth link 240, causing it to move from the fourth initial position to the fourth end position. First, the first process is executed: the fourth link 240 drives the second link 220 to move from the second initial position to the second end position. At this time, the first pin 110 moves relative to the second link 220, and the first pin 110 slides into the second slide groove A at the intersection of the second slide groove A and the second slide groove B, supported by one side wall of the second slide groove A. Then, the second process begins: the fourth link 240 can rotate simultaneously against the second link 220 and the third link 230. The second link 220 continues to move towards the second end position, and the third... Link 230 can move from the third end position to the third initial position to release the restriction of the third link 230 on the first pin 110. When the first slide groove and the second slide groove B coincide, the first pin 110 can be inserted between the first slide groove and the second slide groove B. In this way, the first link 210 can be driven by the second link 220. During this process, since the fourth link 240 first drives the second link 220 to move, the first pin 110 moves away from the boundary between the second slide groove A and the second slide groove B, and then drives the third link 230 to move. The third link 230 moves from the third end position to the third initial position, which can prevent the first pin 110 from sliding directly into the second slide groove B, causing the unlocking action to be performed directly in the unlockable state. Subsequently, the second link 220 returns to the second initial position, and the fourth link 240 returns to the fourth initial position. At this time, the first slide groove and the second slide groove B are aligned, and the first pin 110 slides into the second slide groove B.

[0056] When the one-way unlocking mechanism switches from the unlockable state to the unlocked state, it drives the fourth link 240 again, causing the fourth link 240 to move from the fourth initial position to the fourth end position. The fourth link 240 drives the first link 210 to rotate through the second link 220. The first link 210 moves from the first initial position to the first end position, triggering the lock assembly and completing the unlocking.

[0057] This design simplifies the user's door opening process and reduces the number of openings required for the sliding door.

[0058] It should be noted that inserting the first pin 110 into the connection between the second slide groove A and the second slide groove B is regarded as inserting the first pin 110 into the second slide groove A.

[0059] Optionally, the one-way unlocking structure also includes an actuator 600, which drives the third link 230 to move from the third initial position to the third end position.

[0060] Optionally, the one-way unlocking structure also includes a first elastic element 310, which makes the first pin 110 always tend to move into the second slide groove B.

[0061] For example, the first elastic element 310 can undergo elastic deformation. When the third link 230 moves from the third initial position to the third end position, it pushes the first pin 110 into the second slide groove A along the length direction of the second slide groove B. When the third link 230 returns to the third initial position and the second link 220 returns to the second initial position, the second slide groove B coincides with the first slide groove, and the first pin 110 enters the second slide groove B under the action of the first elastic element 310.

[0062] Optionally, the one-way unlocking structure also includes a second elastic element 320, which is used to drive the fourth link 240 to reset.

[0063] For example, the second elastic element 320 can undergo elastic deformation. When the fourth link 240 is subjected to an external force and moves from the fourth initial position to the fourth end position, the second elastic element 320 undergoes elastic deformation. When the external force is removed, the second elastic element 320 restores its elastic deformation, causing the fourth link 240 to return to the fourth initial position.

[0064] Optionally, the one-way unlocking structure also includes a second pin 120, a second sliding groove C is provided on the second link 220, one end of the second pin 120 is inserted into the second sliding groove C, and the fourth link 240 drives the second link 220 through the second pin 120.

[0065] For example, the length direction of the second slide groove C is parallel to the radial direction of the first hinge shaft 510, the depth direction of the second slide groove C is parallel to the axial direction of the first hinge shaft 510, one end of the second pin 120 is slidably inserted into the second slide groove C, and the other end extends out of the second slide groove C, and the fourth link 240 drives the second link 220 through the second pin 120.

[0066] Optionally, the third link 230 is provided with a third sliding groove, which is arc-shaped and its center coincides with the rotation axis of the third link 230. The fourth link 240 is equipped with a third pin, which is slidably inserted into the third sliding groove.

[0067] For example, when the fourth link 240 rotates from the fourth initial position to the fourth final position to perform the first stroke, the third pin slides in the third groove, and the fourth link 240 and the third link 230 do not have an abutting relationship. When performing the second stroke, the third pin abuts against one side wall of the third groove, and at this time the fourth link 240 can rotate against the third link 230.

[0068] Optionally, the one-way unlocking structure also includes a first handle, which is movably mounted on the inside of the sliding door and connected to the fourth link 240 via a first pull cable 400. In use, the user can drive the fourth link 240 using the first handle.

[0069] For example, a first handle is movably mounted on a sliding door. The first handle has a first stationary position and a first unlocked position relative to the sliding door. When the first handle moves from the first stationary position to the first unlocked position, it can drive the fourth link 240 to move from the fourth initial position to the fourth end position via the first pull cable 400.

[0070] Optionally, the one-way unlocking structure also includes a second handle and a fifth link 250. The second handle is movably mounted on the outside of the sliding door, and the fifth link 250 is movably mounted on the sliding door. The second handle is connected to the fifth link 250 via a second pull cable, and the fifth link 250 can drive the first link 210 to rotate.

[0071] For example, the fifth link 250 is hinged to the sliding door via the first hinge shaft 510. The fifth link 250 has a fifth initial position and a fifth end position relative to the sliding door. The fifth link 250 switches between the fifth initial position and the fifth end position by rotating relative to the sliding door.

[0072] In one embodiment, a second handle is movably mounted on the outside of the sliding door, allowing the user to operate it from outside the vehicle. The second handle is connected to a fifth link 250 via a second cable. The second handle has a second stationary position and a second unlocked position relative to the sliding door. When the second handle moves from the second stationary position to the second unlocked position, it drives the fifth link 250 to move from a fifth initial position to a fifth final position via the second cable. The fifth link 250 is connected to a second link 220. When the fifth link 250 rotates from the fifth initial position to the fifth final position, the second link 220 rotates accordingly, rotating from the second initial position to the second final position. If the door is already in an unlockable state, i.e., when the first pin 110 is inserted into the first and second slide grooves B, unlocking can be achieved through the linkage of the second handle, the fifth link 250, the second link 220, and the first link 210, thus opening the sliding door. If the device is in an unlockable state, that is, when the first pin 110 is inserted into the first slide groove and the second slide groove A, the second handle cannot drive the first connecting rod 210, and therefore cannot be unlocked.

[0073] In another embodiment, the second handle is movably installed on the outside of the sliding door, meaning the user can operate the second handle from outside the vehicle. The second handle is connected to the fifth link 250 via a second cable. The second handle has a second stationary position and a second unlocked position relative to the sliding door. When the second handle moves from the second stationary position to the second unlocked position, the second handle can drive the fifth link 250 to move from the fifth initial position to the fifth end position via the second cable. The fifth link 250 can abut against the first pin 110. The first pin 110 acts on the first link 210, thereby driving the first link 210 to rotate. That is, when the first pin 110 is inserted into the first slide groove and the second slide groove B, the fifth link 250 can abut against the first pin 110. When the fifth link 250 moves from the fifth initial position to the fifth end position, it can move from the first initial position to the first end position via the first pin 110 abutting against the first link 210, thus unlocking the door.

[0074] A door assembly is also provided, including a sliding door, a locking assembly, and the aforementioned one-way unlocking structure. The locking assembly is installed on the sliding door to lock the sliding door to the vehicle frame, and the one-way unlocking structure is installed on the sliding door to trigger the locking assembly to unlock the sliding door from the vehicle frame.

[0075] Optionally, the lock assembly includes a first lock and a second lock. The first lock is installed on the front side of the sliding door, and the second lock is installed on the rear side of the sliding door. The first lock is connected to the first link 210 via a third pull cable A, and the second lock is connected to the first link 210 via a third pull cable B.

[0076] A vehicle is also provided, including a vehicle frame and the aforementioned door assembly.

[0077] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A one-way unlocking structure, characterized in that, include: First pin (110); The linkage assembly includes a first linkage (210), a second linkage (220), a third linkage (230), and a fourth linkage (240). The first linkage (210), the second linkage (220), and the fourth linkage (240) are coaxially hinged to the sliding door. One end of the first linkage (210) is used to trigger the lock assembly, and the other end is provided with a first sliding groove. The second linkage (220) is provided with a second sliding groove A and a second sliding groove B, and the second sliding groove A and the second sliding groove B are connected. One end of the first pin (110) is slidably inserted into the first sliding groove. When the first pin... When the other end of (110) is slidably inserted into the second slide groove A, the first connecting rod (210) and the second connecting rod (220) can move relative to each other. When the other end of the first pin (110) is slidably inserted into the second slide groove B, the first connecting rod (210) and the second connecting rod (220) move synchronously. The third connecting rod (230) can push the first pin (110) into the second slide groove A. During the rotation of the fourth connecting rod (240), it can first drive the second connecting rod (220) to rotate, and then drive the third connecting rod (230) to rotate.

2. The one-way unlocking structure according to claim 1, characterized in that, It also includes a first elastic element (310), which makes the first pin (110) always have a tendency to move into the second groove B.

3. The one-way unlocking structure according to claim 1, characterized in that, It also includes a second elastic element (320) for driving the fourth link (240) to reset.

4. The one-way unlocking structure according to claim 1, characterized in that, It also includes a second pin (120), the second link (220) has a second groove C, one end of the second pin (120) is inserted into the second groove C, and the fourth link (240) drives the second link (220) through the second pin (120).

5. The one-way unlocking structure according to claim 1, characterized in that, The third link (230) has a third sliding groove, which is arc-shaped and its center coincides with the rotation axis of the third link (230). The fourth link (240) is equipped with a third pin, which is slidably inserted into the third sliding groove.

6. The one-way unlocking structure according to claim 1, characterized in that, It also includes a first handle, which is movably mounted on the inside of the sliding door and is connected to the fourth link (240) via a first pull cable (400).

7. The one-way unlocking structure according to claim 1, characterized in that, It also includes a second handle and a fifth link (250). The second handle is movably mounted on the outside of the sliding door, and the fifth link (250) is movably mounted on the sliding door. The second handle is connected to the fifth link (250) via a second pull cable, and the fifth link (250) can drive the first link (210) to rotate.

8. A door assembly, characterized in that, The device includes the sliding door, the locking assembly, and the one-way unlocking structure according to any one of claims 1-7. The locking assembly is installed on the sliding door for locking the sliding door and the vehicle frame. The one-way unlocking structure is installed on the sliding door for triggering the locking assembly to unlock the sliding door and the vehicle frame.

9. The door assembly according to claim 8, characterized in that, The lock assembly includes a first lock and a second lock. The first lock is installed on the front side of the sliding door, and the second lock is installed on the rear side of the sliding door. The first lock is connected to the first connecting rod (210) via a third pull line A, and the second lock is connected to the first connecting rod (210) via a third pull line B.

10. A vehicle, characterized in that, Includes the vehicle frame and the door assembly as described in claim 8.

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