Sequential locking assembly and expansion type locking hinge device
By introducing a sequential locking assembly and driving structure into the articulation device, the coordination between the locking slider and the drive slider is solved, and the problem of the articulation device being unlocked due to human error is achieved, and the stability of the locking state and the simplicity of operation are achieved. .
Patent Information
- Application Number
- CN202420471891.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-03-12
AI Technical Summary
The existing articulation device may be unlocked due to human error under the action of external forces, resulting in the unexpected release of the locked state.
A sequential locking assembly and an expansion locking hinge device are designed to lock the expansion member in the third position by locking the slider and drive structure, ensuring that the sequential locking must be first released when the locking state is unlocked, thereby Avoid the locking state being lifted due to human errors.
The possibility of unlocking the locking state due to human error is effectively avoided, and the operation is simple. The locking slider is driven to the fifth position to lock the expansion member, and to unlock the locking at the sixth position to ensure stability.
Smart Images
Figure CN222277193U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of connection devices, in particular to a sequential locking component and an expansion type locking hinge device. Background Art
[0002] A hinge is a device used to connect two parts, which enables one part to open and close relative to the other part.
[0003] like Figure 1-2 A hinge device is shown, which includes a first hinge 100, a second hinge 200 and a locking assembly. The first hinge 100 and the second hinge 200 are hinged to each other. The locking assembly is arranged at the hinge center of the first hinge 100 and the second hinge 200. The locking assembly includes an expansion structure and a one-way bearing 310. The expansion structure includes an end cover 320, a locking member 330, an expansion member 340 and a spring 350. The expansion member 340 has a third position and a fourth position. When the expansion member 340 is in the third position, the locking assembly is in a locked state, and when the expansion member 340 is in the fourth position, the locking assembly is in an unlocked state.
[0004] The disadvantages of the above-mentioned hinged device are:
[0005] When the expansion member 340 is in the third position, when an external force acts on the expansion member 340, the expansion member 340 can overcome the elastic force of the elastic member 430 and move to the fourth position, so there is a possibility that the locking state is released due to human error. Summary of the invention
[0006] In view of the defects in the prior art, the purpose of the present utility model is to provide a sequential locking assembly and an expansion locking hinge device, which can lock the expansion member in a third position, thereby avoiding the possibility of releasing the locking state due to human error.
[0007] In order to achieve the above-mentioned purpose, on the one hand, the utility model provides a sequential locking assembly, which is arranged on an expansion locking hinge device, the expansion locking hinge device comprises a first hinge, a second hinge and a locking assembly, the first hinge and the second hinge are hinged to each other, the locking assembly is arranged at the hinge center of the first hinge and the second hinge, the locking assembly comprises an expansion member, the expansion member has a third position and a fourth position, wherein when the expansion member is in the third position, the locking assembly is in a locked state, and when the expansion member is in the fourth position, the locking assembly is in an unlocked state, the sequential locking assembly is used to lock the expansion member in the third position, and comprises:
[0008] a locking slider, which is slidably connected to the expansion member and has a fifth position and a sixth position, wherein when the locking slider is in the fifth position, the locking slider can lock the expansion member in the third position, and when the locking slider is in the sixth position, the locking slider releases the lock on the expansion member; and
[0009] The driving structure is used to drive the locking slider to reciprocate between the fifth position and the sixth position.
[0010] Furthermore, the driving structure comprises:
[0011] a driving slider, which is slidably connected to the expansion member and can perform reciprocating linear motion between a seventh position and an eighth position along the length direction of the expansion member, wherein the driving slider is transmission-connected to the locking slider, wherein when the driving slider is in the seventh position, the driving slider drives the locking slider to the fifth position, and when the driving slider is in the eighth position, the driving slider drives the locking slider to the sixth position; and
[0012] A driving unit is used to drive the driving slider to perform reciprocating linear motion between the seventh position and the eighth position.
[0013] Furthermore, a second sliding hole is provided on the locking slider, the second sliding hole is arranged obliquely, and the driving slider is transmission-connected to the locking slider via the second sliding hole.
[0014] Furthermore, the driving unit comprises:
[0015] a first elastic member, which is disposed on the expansion member and has a tendency to move the locking slider from the sixth position to the fifth position in a natural state;
[0016] a second elastic member, which is disposed on the expansion member and has a tendency to move the driving slider from the eighth position to the seventh position in a natural state; and
[0017] A driving handle, which is fixedly connected to the driving slider via a pull rope;
[0018] Wherein, the first end of the locking slider is provided with a guiding inclined surface for moving the locking slider from the fifth position to the sixth position.
[0019] Furthermore, the elastic member is an elastic sheet.
[0020] Furthermore, a third sliding hole is provided on the expansion piece, and the driving slider is slidably provided in the third sliding hole, wherein when the driving slider is in the eighth position, the driving slider is located at one end of the third sliding hole facing the end cover.
[0021] On the other hand, the utility model provides an expansion locking hinge device, comprising any one of the sequential locking components described above.
[0022] Beneficial effects of the utility model:
[0023] The sequential locking assembly and the expansion locking hinge device provided by the utility model, by setting up the sequential locking assembly, make it necessary to first release the lock of the expansion member by the sequential locking assembly when releasing the locking state of the expansion locking hinge device, thereby achieving the purpose of avoiding the possibility of releasing the locking state due to human error, and by setting the locking slider and the driving structure, the locking slider can be driven to the fifth position by the driving structure to achieve the purpose of locking the expansion member in the third position, and the locking slider can be driven to the sixth position by the driving structure to achieve the purpose of releasing the lock of the expansion member, and the operation is simple. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.
[0025] Figure 1 A three-dimensional view of a hinge device mentioned in the background technology;
[0026] Figure 2 for Figure 1 The cross-sectional view shown;
[0027] Figure 3 A three-dimensional view of an expansion locking hinge device provided by an embodiment of the utility model;
[0028] Figure 4 for Figure 3 An enlarged view of section A is shown;
[0029] Figure 5 for Figure 3 A cross-sectional view of the expansion locking hinge device shown;
[0030] Figure 6 for Figure 5 An enlarged view of section B is shown;
[0031] Figure 7It is a structural view of a one-way bearing in the prior art.
[0032] Reference numerals:
[0033] 100, first hinge; 200, second hinge; 310, one-way bearing; 320, end cover; 321, first slide hole; 322, through hole; 330, locking member; 331, sliding portion; 332, expansion block; 340, expansion member; 341, conical section; 342, third slide hole; 350, spring; 410, locking slider; 411, guide ramp; 412, second slide hole; 420, driving slider; 430, elastic member; 440, driving handle; 450, pull rope. DETAILED DESCRIPTION
[0034] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.
[0035] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.
[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0037] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically limited.
[0038] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.
[0039] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean 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, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0040] like Figure 3-6 As shown, the utility model provides a sequential locking assembly and an expansion type locking hinge device having the sequential locking assembly. The expansion type locking hinge device comprises a first hinge 100, a second hinge 200, a locking assembly and the sequential locking assembly.
[0041] The first end of the first hinge 100 is hinged to the first end of the second hinge 200 .
[0042] The locking assembly includes an expansion structure and a one-way bearing 310 .
[0043] The expansion structure is arranged at the hinge center of the first hinge 100 and the second hinge 200, and the expansion structure is rotatably connected to the first hinge 100 and the second hinge 200. The one-way bearing 310 is arranged coaxially with the hinge center line of the first hinge 100 and the second hinge 200, and the one-way bearing is sleeved on the expansion structure. Two one-way bearings are arranged, and the two one-way bearings are respectively arranged on the sides of the first hinge 100 and the second hinge 200 that are away from each other, and the two one-way bearings are respectively fixedly connected to the first hinge 100 and the second hinge 200.
[0044] Among them, the expansion structure has a first working state and a second working state. When the expansion structure is in the first working state, the single bearing can only rotate in a preset direction, and the rotation directions of the two single bearings are opposite. When the expansion structure is in the second working state, the single bearing can rotate in any direction around its own rotation center line.
[0045] Specifically, the expansion structure includes an end cap 320 , a locking member 330 , an expansion member 340 and a spring 350 .
[0046] There are two end covers 320 , which are respectively arranged at the ends of the two one-way bearings 310 away from each other, and the two end covers 320 are respectively rotatably connected to the two one-way bearings 310 . Of course, the two end covers 320 cannot move along the rotation center line of the one-way bearing 310 .
[0047] The cross section of the locking member 330 is in an arc shape, and the outer diameter of the locking member 330 corresponding to the one-way bearing 310 is adapted to the inner side of the one-way bearing 310. The locking member 330 is arranged at the hinge center of the first hinge 100 and the second hinge 200. The locking member 330 is rotatably connected with the first hinge 100 and the second hinge 200, and the two ends of the locking member 330 are respectively slidably connected with the two end covers 320. Specifically, the end cover 320 is provided with a first sliding hole 321, and the locking member 330 is provided with a sliding portion 331 adapted to the first sliding hole 321, and the sliding portion 331 is slidably inserted in the first sliding hole 321. The locking member 330 can make reciprocating linear motion between a first position and a second position in a direction close to or away from the axial line of the end cover 320, wherein when the locking member 330 is in the first position, the side wall of the locking member 330 conflicts with the one-way bearing 310 so that the one-way bearing 310 can only rotate in a preset direction, and when the locking member 330 is in the second position, the side wall of the locking member 330 does not conflict with the one-way bearing 310 so that the one-way bearing 310 can rotate in any direction around its rotation center line.
[0048] Specifically, the one-way bearing is a one-way needle bearing, and when its needle contacts the locking member 430, its one-way control structure can be triggered, and when its needle contacts the locking member 430, its one-way control structure cannot be triggered. These are all prior arts, for details, please refer to Figure 7 .
[0049] When in use, the locking member 330 is placed in the first position so that the two one-way bearings 310 can only rotate in a preset direction. Since the two one-way bearings 310 can rotate in opposite directions, assuming that the one-way bearing 310 corresponding to the first hinge 100 can only rotate in a clockwise direction, that is, the locking member 330 can only rotate in a counterclockwise direction relative to the first hinge 100, and the one-way bearing 310 corresponding to the second hinge 200 can only rotate in a counterclockwise direction, that is, the locking member 330 can only rotate in a clockwise direction relative to the second hinge 200. If the first hinge 100 rotates in the counterclockwise direction with the one-way bearing 310, under the action of the one-way bearing 310 fixedly connected to the first hinge 100, the first hinge 100 rotates in the counterclockwise direction with the locking member 330, so that the locking member 330 rotates in the counterclockwise direction relative to the second hinge 200. Under the action of the one-way bearing 310 connected to the second hinge 200, the locking member 330 can only rotate in the clockwise direction relative to the second hinge 200, but cannot rotate in the counterclockwise direction relative to the second hinge 200, so that the first hinge 100 cannot rotate in the counterclockwise direction relative to the second hinge 200, thereby achieving the purpose of locking the first hinge 100 and the second hinge 200 so that the first hinge 100 can only rotate in one direction relative to the second hinge 200.
[0050] When the locking member 330 is placed in the second position, the two one-way bearings 310 can rotate in any direction around their own rotation center lines, thereby allowing the first hinge 100 and / or the second hinge 200 to rotate in any direction around their own rotation center lines.
[0051] The expansion member 340 is arranged inside the locking member 330, and the two ends of the expansion member 340 are slidably connected with the end cover 320. The expansion member 340 can make reciprocating linear motion between the third position and the fourth position along the length direction of the locking member 330. Two conical sections 341 are arranged on the expansion member 340, and the inner sides of the two ends of the locking member 330 are provided with expansion blocks 332 adapted to the conical sections 341. When the expansion member 340 is in the third position, the conical section 341 corresponds to the expansion block 332, and the locking member 330 is driven to the first position under the interaction between the expansion block 332 and the conical section 341. When the expansion member 340 is in the fourth position, the conical section 341 is separated from the expansion block 332, so that the locking member 330 has space to move to the second position. When the rotating member rotates, the locking member 330 is driven to the second position under the action of the friction between the rotating member and the locking member 330.
[0052] The spring 350 is sleeved on the expansion member 340 , and both ends of the spring 350 are respectively connected to the end cover 320 and the expansion member 340 , and in a natural state, the spring 350 has a tendency to move the expansion member 340 from the fourth position to the third position.
[0053] The sequential locking assembly is arranged on the above-mentioned expansion locking hinge device, and the sequential locking assembly is used to lock the expansion member 340 in the third position, so that when the above-mentioned expansion locking hinge device is released from the locked state, it is necessary to first release the lock of the expansion member 340 by the sequential locking assembly, and the sequential locking assembly includes a locking slider 410 and a driving structure.
[0054] The locking slider 410 is slidably connected to the expansion member 340, and the locking slider 410 has a fifth position and a sixth position, wherein when the locking slider 410 is in the fifth position, the locking slider 410 can lock the expansion member 340 in the third position. Specifically, when the locking slider 410 is in the fifth position, the first end of the locking slider 410 can contact the end wall of the end cover 320, so that the locking slider 410 cannot pass through the end cover 320, so that the expansion member 340 cannot move from the third position to the fourth position, thereby achieving the purpose of locking the expansion block 332 in the third position.
[0055] When the locking slider 410 is in the sixth position, the locking slider 410 unlocks the expansion member 340. Specifically, when the locking slider 410 is in the sixth position, the first end of the locking slider 410 cannot interfere with the end wall of the end cover 320, so that the expansion member 340 can move from the third position to the fourth position, thereby unlocking the expansion block 332.
[0056] Specifically, a through hole 322 is provided on the end cover 320 for the expansion piece 340 and the locking slider 410 to pass through. When the locking slider 410 is in the fifth position, the first end of the locking slider 410 can interfere with the end wall of the end cover 320. Under the action of the locking slider 410 and the end cover 320, the locking slider 410 cannot pass through the through hole 322, thereby achieving the purpose of preventing the expansion piece 340 from moving from the third position to the fourth position, so as to lock the expansion piece 340 in the third position.
[0057] When the locking slider 410 is in the sixth position, the first end of the locking slider 410 retracts into the expansion member 340 so that the locking slider 410 can pass through the through hole 322, thereby achieving the purpose of allowing the expansion member 340 to move from the third position to the fourth position.
[0058] The driving structure is used to drive the locking slider 410 to reciprocate between the fifth position and the sixth position.
[0059] When in use, the locking slider 410 is driven from the sixth position to the fifth position through the driving structure. Under the action of the locking slider 410 and the end cover 320, the locking slider 410 cannot pass through the through hole 322, thereby achieving the purpose of preventing the expansion piece 340 from moving from the third position to the fourth position, so as to lock the expansion piece 340 in the third position.
[0060] The locking slider 410 is driven from the fifth position to the sixth position by the driving structure, so that the locking slider 410 can pass through the through hole 322, thereby achieving the purpose of enabling the expansion member 340 to move from the third position to the fourth position.
[0061] In this embodiment, the sequential locking assembly provided has a simple structure and a reasonable design. By driving the locking slider 410 from the sixth position to the fifth position through the driving structure, the purpose of locking the expansion member 340 in the third position can be achieved. By driving the locking slider 410 from the fifth position to the sixth position through the driving structure, the purpose of moving the expansion member 340 from the third position to the fourth position can be achieved. The operation is convenient.
[0062] In one embodiment, the driving structure includes a driving slider 420 and a driving unit.
[0063] The driving slider 420 is slidably connected to the expansion piece 340. Specifically, a second sliding hole 412 is provided on the locking slider 410. The second sliding hole 412 is tilted. The driving slider 420 is transmission-connected to the locking slider 410 through the second sliding hole 412. The driving slider 420 can make reciprocating linear motion between the seventh position and the eighth position along the length direction of the expansion piece 340. The driving slider 420 is transmission-connected to the locking slider 410. When the driving slider 420 is in the seventh position, the driving slider 420 drives the locking slider 410 to the fifth position. When the driving slider 420 is in the eighth position, the driving slider 420 drives the locking slider 410 to the sixth position. The driving unit is used to drive the driving slider 420 to make reciprocating linear motion between the seventh position and the eighth position.
[0064] When in use, the driving slider 420 is driven from the eighth position to the seventh position. During this process, the driving slider 420 drives the locking slider 410 from the sixth position to the fifth position.
[0065] The driving slider 420 is driven from the seventh position to the eighth position, and during this process, the driving slider 420 drives the locking slider 410 from the fifth position to the sixth position.
[0066] Specifically, the driving unit includes an elastic member 430 and a driving handle 440 .
[0067] The elastic member 430 is disposed on the expansion member 340, and in a natural state, the elastic member 430 has a tendency to move the locking slider 410 from the sixth position to the fifth position. The driving handle 440 is fixedly connected to the driving slider 420 through a pull rope 450. The first end of the locking slider 410 is provided with a guide slope 411 for moving the locking slider 410 from the fifth position to the sixth position. Specifically, the guide slope 411 is disposed at the first end of the locking slider 410, and when the locking slider 410 is in the sixth position, the guide slope 411 is located on the side of the locking slider 410 facing the end cover 320.
[0068] When in use, external force is used to drive the driving handle 440 to move the driving slider 420 from the seventh position to the eighth position. During this process, the driving slider 420 enables the locking slider 410 to overcome the elastic force of the elastic member 430 and move from the fifth position to the sixth position. When the external force is eliminated, under the action of the elastic force of the elastic member 430, the elastic member 430 drives the locking slider 410 from the sixth position to the fifth position. Under the action of the transmission connection relationship between the locking slider 410 and the driving slider 420, the locking slider 410 drives the driving slider 420 from the eighth position to the seventh position.
[0069] Preferably, the elastic member 430 is an elastic sheet, which is disposed at the second end of the locking slider 410 , and is fixedly connected to the expansion member 340 or the end cover 320 .
[0070] When in use, under the action of external force, during the process of the locking slider 410 moving from the fifth position to the sixth position, the locking slider 410 pushes the elastic sheet through its second end to deform the elastic sheet, and the elastic sheet accumulates force. When the external force is eliminated, under the action of the elastic force of the elastic sheet, the elastic sheet drives the locking slider 410 from the sixth position to the fifth position.
[0071] Preferably, a third sliding hole 342 is provided on the expansion piece 340, and the driving slider 420 is slidably provided in the third sliding hole 342, wherein when the driving slider 420 is in the eighth position, the driving slider 420 is located at one end of the third sliding hole 342 facing the end cover 320 (referring to the end cover 320 that cooperates with the locking slider 410).
[0072] During use, when the driving slider 420 moves to the eighth position, under the action of the third sliding hole 342, the driving slider 420 cannot continue to move away from the seventh position, so that the purpose of driving the expansion piece 340 from the third position to the fourth position can be achieved by continuing to pull the driving handle 440.
[0073] The working principle of the utility model:
[0074] When in use, external force is used to pull the driving slider 420 from the seventh position to the eighth position through the driving handle 440. During this process, the driving slider 420 drives the locking slider 410 from the fifth position to the sixth position. The driving slider 420 is continued to be pulled, so that the expansion piece 340 can be pulled by the driving slider 420, so that the expansion piece 340 overcomes the elastic force of the spring 350 and moves from the third position to the fourth position.
[0075] After the external force is eliminated, under the action of the elastic force of the spring 350, the spring 350 causes the expansion piece 340 to move from the fourth position to the third position. Since the first end of the locking slider 410 is provided with a guide bevel 411, under the joint action of the guide bevel 411 and the end cover 320, the end cover 320 drives the locking slider 410 from the fifth position to the sixth position through the guide bevel 411, so that the locking slider 410 can pass through the end cover 320, and then the expansion piece 340 can move from the fourth position to the third position. When the expansion piece 340 moves to the third position, the locking slider 410 passes through the end cover 320, and under the action of the elastic force of the elastic piece 430, the locking slider 410 moves from the sixth position to the fifth position, thereby achieving the purpose of locking the expansion piece 340 in the third position.
[0076] In the specification of the present utility model, a lot of specific details are described. However, it is understood that the embodiments of the present utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.
[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.
Claims
1. A sequential locking assembly, arranged on an expansion locking hinge device, the expansion locking hinge device comprising a first hinge (100), a second hinge (200) and a locking assembly, the first hinge (100) and the second hinge (200) being hinged to each other, the locking assembly being arranged at the hinge center of the first hinge (100) and the second hinge (200), the locking assembly comprising an expansion member (340), the expansion member (340) having a third position and a fourth position, wherein: When the expansion member (340) is in the third position, the locking assembly is in a locked state, and when the expansion member (340) is in the fourth position, the locking assembly is in an unlocked state, characterized in that the sequential locking assembly is used to lock the expansion member (340) in the third position, and comprises: a locking slider (410) slidably connected to the expansion piece (340), and having a fifth position and a sixth position, wherein when the locking slider (410) is in the fifth position, the locking slider (410) can lock the expansion piece (340) in the third position, and when the locking slider (410) is in the sixth position, the locking slider (410) releases the lock on the expansion piece (340); and A driving structure is used to drive the locking slide block (410) to reciprocate between the fifth position and the sixth position.
2. The sequential locking assembly according to claim 1, characterized in that: The driving structure comprises: a driving slider (420) which is slidably connected to the expansion member (340) and can perform reciprocating linear motion between a seventh position and an eighth position along the length direction of the expansion member (340); the driving slider (420) is transmission-connected to the locking slider (410); when the driving slider (420) is in the seventh position, the driving slider (420) drives the locking slider (410) to the fifth position; and when the driving slider (420) is in the eighth position, the driving slider (420) drives the locking slider (410) to the sixth position; and A driving unit, used for driving the driving slider (420) to perform reciprocating linear motion between the seventh position and the eighth position.
3. The sequential locking assembly according to claim 2, characterized in that: The locking slider (410) is provided with a second sliding hole (412), the second sliding hole (412) is arranged at an angle, and the driving slider (420) is transmission-connected to the locking slider (410) via the second sliding hole (412).
4. The sequential locking assembly according to claim 2 or 3, characterized in that: The driving unit comprises: an elastic member (430) disposed on the expansion member (340) and having a tendency to move the driving slider (420) from the eighth position to the seventh position in a natural state; and A driving handle (440) fixedly connected to the driving slider (420) via a pull rope (450); Wherein, a guiding inclined surface (411) for enabling the locking slide block (410) to move from the fifth position to the sixth position is provided at the first end of the locking slide block (410).
5. The sequential locking assembly according to claim 4, characterized in that: The elastic member (430) is an elastic sheet.
6. The sequential locking assembly according to claim 2, 3 or 5, characterized in that: The expansion piece (340) is provided with a third sliding hole (342), and the driving slider (420) is slidably disposed in the third sliding hole (342), wherein when the driving slider (420) is in an eighth position, the driving slider (420) is located at an end of the third sliding hole (342) facing the end cover (320).
7. An expansion locking hinge device, characterized in that: It comprises the sequential locking assembly described in any one of claims 1-6.