Expansion type locking hinge device

Abstract

The utility model belongs to the technical field of connecting devices, and provides an expanding type locking hinge device which comprises a first component, a second component and a locking mechanism. Wherein the first part is arranged on one side of the second part, and the first end of the first part is hinged to the first end of the second part; the locking mechanism is arranged on the first component and / or the second component, when the locking mechanism is in a locking state, the first component and / or the second component can only rotate in the preset direction, and when the locking mechanism is in an unlocking state, the first component and / or the second component can only rotate in the preset direction. The first part and / or the second part can rotate around the hinge center line of the first part and / or the second part in any direction. The expanding type locking hinge device provided by the utility model is simple in structure, and the included angle between the first component and the second component can be prevented from being reduced by arranging the locking mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of connection devices, in particular to 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] However, the hinge devices in the prior art do not have a locking function, so the two parts connected by them are movably connected, that is, the two parts connected by the hinge device can open and close arbitrarily, and the angle between the two parts cannot be prevented from becoming smaller. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the utility model is to provide an expansion locking hinge device, so that in an unlocked state, the two parts hinged to each other can rotate in any direction around their own hinge center lines, while in a locked state, the two parts hinged to each other can only rotate in a preset direction, thereby achieving the purpose of preventing the angle between the two parts from becoming smaller.

[0005] In order to achieve the above-mentioned object, the utility model provides an expansion type locking hinge device, comprising a first component, a second component and a locking mechanism;

[0006] Wherein, the first component is arranged on one side of the second component, and the first end of the first component is hinged to the first end of the second component;

[0007] The locking mechanism is arranged on the first component and / or the second component, and when the locking mechanism is in a locked state, the first component and / or the second component can only rotate in a preset direction, and when the locking mechanism is in an unlocked state, the first component and / or the second component can rotate in any direction around its own hinge center line.

[0008] Furthermore, it also includes a limiting member, a first cylindrical connecting portion is provided on the side of the first member facing the second member, a second connecting portion is provided on the side of the second member facing the first member, the second connecting portion is sleeved on the first connecting portion and rotatably connected to the first connecting portion, an annular limiting groove is coaxially provided on the outer peripheral wall of the first connecting portion, a limiting hole is provided on the second connecting portion, and the limiting member extends into the annular limiting groove after passing through the limiting hole.

[0009] Furthermore, the locking mechanism comprises:

[0010] an expansion structure disposed at a hinge center of the first component and the second component;

[0011] A rotating member, which is coaxially arranged with the hinge center line of the first component and the second component, and is sleeved on the expansion structure. Two rotating members are provided, and the two rotating members are respectively arranged on the sides of the first component and the second component that are away from each other. The two rotating members are respectively fixedly connected to the first component and the second component; and

[0012] In which, the expansion structure has a first working state and a second working state. When the expansion structure is in the first working state, the rotating member can only rotate along a preset direction, and the rotation directions of the two rotating members are opposite. When the expansion structure is in the second working state, the rotating member can rotate in any direction around its own rotation center line.

[0013] Furthermore, the expansion structure comprises:

[0014] Two end covers are provided, the two end covers are respectively provided at ends of the two rotating members that are away from each other, and the two end covers are respectively rotatably connected to the two rotating members;

[0015] A locking member, whose cross section is in the shape of an arc, whose outer diameter at a position corresponding to the rotating member is adapted to the inner side of the rotating member, which is arranged at the hinge center of the first component and the second component, and is rotatably connected to the first component and the second component, and whose two ends are respectively slidably connected to the two end covers, and which can reciprocate linearly between a first position and a second position in a direction close to or away from the axis of the end cover, wherein when the locking member is in the first position, the side wall of the locking member contacts the rotating member, so that the rotating member can only rotate in a preset direction, and when the locking member is in the second position, the side wall of the locking member does not contact the rotating member, so that the rotating member can rotate in any direction around its rotation center line; and

[0016] A drive assembly is used to drive the lock to perform reciprocating linear motion between the first position and the second position.

[0017] Furthermore, the driving assembly comprises:

[0018] an expansion member, which is arranged on the inner side of the locking member, and whose two ends are slidably connected to the end cover, and can make reciprocating linear motion between a third position and a fourth position along the length direction of the locking member, and the expansion member is provided with two conical sections, and the inner sides of the two ends of the locking member are provided with expansion blocks adapted to the conical sections, wherein when the expansion member is in the third position, the conical section corresponds to the expansion block, and when the expansion member is in the fourth position, the conical section is separated from the expansion block; and

[0019] The driving unit is used to drive the expansion member to perform reciprocating linear motion between the third position and the fourth position.

[0020] Furthermore, the driving unit comprises:

[0021] an elastic member, which is sleeved on the expansion member and has a tendency to move the expansion member from the fourth position to the third position in a natural state; and

[0022] A handle is fixedly connected to the expansion piece via a draw cord.

[0023] Furthermore, a plurality of locking members are provided, and the plurality of locking members are evenly arranged around a rotation center line of the rotating member.

[0024] Furthermore, the rotating member is a one-way bearing.

[0025] Beneficial effects of the utility model:

[0026] The expansion locking hinge device provided by the utility model has a simple structure and a reasonable design. By setting a locking mechanism, the purpose of locking the rotation of the first component and the second component is achieved, thereby achieving the purpose of making the first component and / or the second component only rotate in the budgeted direction or unable to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] Figure 1 A three-dimensional view of an expansion locking hinge device provided by an embodiment of the utility model;

[0029] Figure 2 for Figure 1 An enlarged view of section A is shown;

[0030] Figure 3 for Figure 1 A cross-sectional view of the expansion locking hinge device shown;

[0031] Figure 4 for Figure 3 An enlarged view of section B is shown;

[0032] Figure 5 It is a structural view of a one-way bearing in the prior art.

[0033] Reference numerals:

[0034] 100, first component; 110, first connecting portion; 120, annular limiting groove; 200, second component; 210, second connecting portion; 220, limiting hole; 300, limiting member; 410, rotating member; 420, end cover; 421, sliding hole; 430, locking member; 431, sliding portion; 432, expansion block; 440, expansion member; 441, conical section; 450, elastic member; 460, handle; 461, limiting portion; 470, limiting plate; 471, slot; 480, pull rope. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] like Figure 1-4 As shown, the utility model provides an expansion type locking hinge device, comprising a first component 100, a second component 200 and a locking mechanism.

[0042] The first component 100 is disposed on one side of the second component 200 , and a first end of the first component 100 is hinged to a first end of the second component 200 .

[0043] The locking mechanism is arranged on the first component 100 and / or the second component 200, and when the locking mechanism is in the locked state, the first component 100 and / or the second component 200 can only rotate in a preset direction, specifically, when the first component 100 can only rotate in the clockwise direction relative to the second component 200, the second component 200 can only rotate in the counterclockwise direction relative to the first component 100, and when the first component 100 can only rotate in the counterclockwise direction relative to the second component 200, the second component 200 can only rotate in the clockwise direction relative to the first component 100, thereby achieving the purpose of preventing the angle between the first component 100 and the second component 200 from becoming smaller or larger. When the locking mechanism is in the unlocked state, the first component 100 and / or the second component 200 can rotate in any direction around its own axis.

[0044] When in use, when the first component 100 and the second component 200 need to rotate only in a preset direction, the locking mechanism is placed in a locked state; when the first component 100 and the second component 200 need to rotate in any direction around their own hinge center lines, the locking mechanism is placed in an unlocked state.

[0045] The hinge device provided in this embodiment has a simple structure and a reasonable design. By setting a locking mechanism, the purpose of locking the rotation of the first component 100 and the second component 200 is achieved, thereby achieving the purpose of making the first component 100 and / or the second component 200 only rotate in the budgeted direction or unable to rotate.

[0046] In one embodiment, a limiting member 300 is further included. A cylindrical first connecting portion 110 is provided on the side of the first component 100 facing the second component 200. A second connecting portion 210 is provided on the side of the second component 200 facing the first component 100. The second connecting portion 210 is sleeved on the first connecting portion 110 and is rotatably connected to the first connecting portion 110. An annular limiting groove 120 is coaxially provided on the outer peripheral wall of the first connecting portion 110. A limiting hole 220 is provided on the second connecting portion 210. The limiting member 300 passes through the limiting hole 220 and extends into the annular limiting groove 120.

[0047] In this embodiment, the limiting member 300 is U-shaped, two limiting holes 220 are provided, and two free ends of the limiting member 300 pass through the limiting holes 220 and are inserted into the annular limiting groove 120 .

[0048] When in use, firstly, the second connecting part 210 is sleeved on the first connecting part 110, and then the limiting member 300 is inserted into the limiting hole 220 and the annular limiting groove 120, so as to prevent the first component 100 and the second component 200 from moving along their own hinge center line, thereby achieving the purpose of hinged connection between the first component 100 and the second component 200, thereby achieving the purpose of facilitating the disassembly and assembly of the hinge device.

[0049] The hinged device provided in this embodiment has a simple structure, a reasonable design, and is easy to assemble and disassemble.

[0050] In one embodiment, the locking mechanism includes a rotating member 410 and an expansion structure.

[0051] The expansion structure is arranged at the hinge center of the first component 100 and the second component 200, and the expansion structure is rotatably connected to the first component 100 and the second component 200. The rotating member 410 is arranged coaxially with the hinge center line of the first component 100 and the second component 200, and the rotating member 410 is sleeved on the expansion structure. There are two rotating members 410, and the two rotating members 410 are respectively arranged on the sides of the first component 100 and the second component 200 that are away from each other, and the two rotating members 410 are respectively fixedly connected to the first component 100 and the second component 200.

[0052] 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 rotating member 410 can only rotate along a preset direction, and the rotation directions of the two rotating members 410 are opposite. When the expansion structure is in the second working state, the rotating member 410 can rotate in any direction around its own rotation center line.

[0053] When in use, the expansion structure is placed in the first working state so that the rotating member 410 can only rotate in a preset direction. Since the preset directions of the two rotating members 410 are opposite (that is, the directions in which the two rotating members 410 can rotate are opposite), the first component 100 and the second component 200 can only rotate in one direction.

[0054] Specifically, Figure 1 As shown, it is assumed that when the expansion structure is in the first working state, the rotating member 410 corresponding to the first component 100 can only rotate in the counterclockwise direction, that is, the expansion structure can only rotate in the clockwise direction relative to the first component 100, and the rotating member 410 corresponding to the second component 200 can only rotate in the clockwise direction, that is, the expansion structure can only rotate in the counterclockwise direction relative to the second component 200. If the first component 100 rotates in the clockwise direction with the rotating member 410, under the action of the rotating member 410 fixedly connected to the first component 100, the first component 100 rotates in the clockwise direction with the expansion structure, so that the expansion structure rotates in the clockwise direction relative to the second component 200. Under the action of the rotating member 410 connected to the second component 200, the expansion structure can only rotate in the counterclockwise direction relative to the second component 200, but cannot rotate in the clockwise direction relative to the second component 200, so that the first component 100 cannot rotate in the clockwise direction relative to the second component 200, thereby achieving the purpose of locking the first component 100 and the second component 200 so that the first component 100 can only rotate in one direction relative to the second component 200.

[0055] When the expansion structure is placed in the second working state, the two rotating members 410 can rotate in any direction around their own rotation center lines, thereby allowing the first component 100 and / or the second component 200 to rotate in any direction around their own rotation center lines.

[0056] The locking mechanism in this embodiment has a simple structure, reasonable design and convenient operation.

[0057] In one embodiment, the expansion structure includes an end cap 420, a locking member 430, and a drive assembly.

[0058] Two end covers 420 are provided. The two end covers 420 are respectively arranged at one end of the two rotating parts 410 away from each other, and the two end covers 420 are respectively rotatably connected to the two rotating parts 410. Of course, the two end covers 420 cannot move along the rotation center line of the rotating part 410.

[0059] The cross section of the locking member 430 is in an arc shape, the outer diameter of the locking member 430 corresponding to the rotating member 410 is adapted to the inner side of the rotating member 410, the locking member 430 is arranged at the hinge center of the first component 100 and the second component 200, the locking member 430 is rotatably connected to the first component 100 and the second component 200, and the two ends of the locking member 430 are respectively slidably connected to the two end covers 420. Specifically, a sliding hole 421 is arranged on the end cover 420, and a sliding portion 431 adapted to the sliding hole 421 is arranged on the locking member 430, and the sliding portion 431 is slidably inserted in the sliding hole 421. The locking member 430 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 420, wherein when the locking member 430 is in the first position, the side wall of the locking member 430 interferes with the rotating member 410 so that the rotating member 410 can only rotate in a preset direction, and when the locking member 430 is in the second position, the side wall of the locking member 430 does not interfere with the rotating member 410 so that the rotating member 410 can rotate in any direction around its rotation center line.

[0060] Preferably, the rotating member 410 is a one-way bearing. When the locking member 430 is in the first position, the outer wall of the locking member 430 contacts the inner side of the one-way bearing. The friction between the one-way bearing and the locking member 430 triggers the one-way control structure of the one-way bearing. Under the action of the one-way control structure, the one-way bearing can only rotate in a preset direction.

[0061] 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 5 .

[0062] When the locking member 430 is in the second position, the outer wall of the locking member 430 will not conflict with the inner side of the one-way bearing. Therefore, no friction will be generated between the one-way bearing and the locking member 430, thereby not triggering the one-way control structure of the one-way bearing. Therefore, the one-way bearing can rotate in any direction around its own rotation center line.

[0063] Preferably, a plurality of locking members 430 are provided, and the plurality of locking members 430 are evenly arranged around the rotation center line of the rotating member 410 to achieve the purpose of improving the locking effect. In the present embodiment, two locking members 430 are provided.

[0064] The driving assembly is used to drive the locking member 430 to perform reciprocating linear motion between the first position and the second position.

[0065] When in use, the driving assembly is used to drive the locking member 430 from the second position to the first position, so that the side wall of the locking member 430 abuts against the inner side of the rotating member 410, so that the rotating member 410 can only rotate along a preset direction.

[0066] The locking member 430 is driven from the first position to the second position by a driving assembly so that the side wall of the locking member 430 does not interfere with the inner side of the rotating member 410, thereby allowing the two rotating members 410 to rotate in any direction around their own rotation center lines, thereby allowing the first component 100 and / or the second component 200 to rotate in any direction around their own rotation center lines.

[0067] The expansion structure in this embodiment has a simple structure and a reasonable design. The purpose of switching the expansion structure between the first working state and the second working state can be achieved by driving the locking member 430 to make reciprocating linear motion between the first position and the second position by the driving component. The operation is simple.

[0068] In one embodiment, the drive assembly includes an expansion member 440 and a drive unit.

[0069] The expansion member 440 is arranged inside the locking member 430, and the two ends of the expansion member 440 are slidably connected with the end cover 420. The expansion member 440 can make reciprocating linear motion between the third position and the fourth position along the length direction of the locking member 430. Two conical sections 441 are arranged on the expansion member 440, and the inner sides of the two ends of the locking member 430 are provided with expansion blocks 432 adapted to the conical sections 441. When the expansion member 440 is in the third position, the conical section 441 corresponds to the expansion block 432, and the locking member 430 is driven to the first position under the interaction between the expansion block 432 and the conical section 441. When the expansion member 440 is in the fourth position, the conical section 441 is separated from the expansion block 432, so that the locking member 430 has space to move to the second position. When the rotating member rotates, the locking member 430 is driven to the second position under the action of the friction between the rotating member and the locking member 430.

[0070] The driving unit is used to drive the expansion member 440 to perform reciprocating linear motion between the third position and the fourth position.

[0071] When in use, the drive unit is used to drive the expansion member 440 from the fourth position to the third position, so that the conical section 441 of the expansion member 440 corresponds to the expansion block 432 of the locking member 430. Under the interaction between the expansion block 432 and the conical section 441, the locking member 430 is driven from the second position to the first position.

[0072] The drive unit is used to drive the expansion member 440 from the third position to the fourth position, so that the conical section 441 of the expansion member 440 is separated from the expansion block 432 of the locking member 430. In this way, the locking member 430 has space to move to the second position. When the rotating member rotates, the locking member 430 can be driven from the first position to the second position under the action of the rotating member.

[0073] The driving assembly in this embodiment has a simple structure, reasonable design and easy operation.

[0074] In one embodiment, the driving unit includes an elastic member 450 and a handle 460 .

[0075] The elastic member 450 is sleeved on the expansion member 440 , and in a natural state, the elastic member 450 has a tendency to move the expansion member 440 from the fourth position to the third position. The handle 460 is fixedly connected to the expansion member 440 via a pull rope 480 .

[0076] When in use, in a natural state, under the action of the elastic force of the elastic member 450, the elastic member 450 keeps the expander 440 at the third position. The handle 460 is pulled by an external force, so that the expander 440 is moved from the third position to the fourth position through the pull rope 480. When the external force is eliminated, under the action of the elastic force of the elastic member 450, the elastic member 450 drives the expander 440 from the fourth position to the third position and keeps it at the third position.

[0077] The driving unit in this embodiment has a simple structure, reasonable design and convenient operation.

[0078] In one embodiment, a limiting plate 470 is provided on the first component 100 or the second component 200, and the limiting plate 470 is L-shaped. A slot 471 adapted to the handle 460 is provided at the free end of the limiting plate 470, and a limiting portion 461 matching the slot 471 is provided on the handle 460, and an outer diameter of the limiting portion 461 is greater than the width of the handle 460.

[0079] When in use, after the expander 440 is driven from the third position to the fourth position by external force, the handle 460 is stuck in the slot 471. Under the action of the limiting portion 461, the expander 440 cannot return to the third position under the action of the elastic force of the elastic member 450, thereby achieving the purpose of keeping the expander 440 in the fourth position.

[0080] 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.

[0081] 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. An expansion locking hinge device, characterized in that: It comprises a first component (100), a second component (200) and a locking mechanism; Wherein, the first component (100) is arranged on one side of the second component (200), and the first end of the first component (100) is hinged to the first end of the second component (200); The locking mechanism is arranged on the first component (100) and / or the second component (200), and when the locking mechanism is in a locked state, the first component (100) and / or the second component (200) can only rotate in a preset direction, and when the locking mechanism is in an unlocked state, the first component (100) and / or the second component (200) can rotate in any direction around its own hinge center line.

2. The expansion locking hinge device according to claim 1, characterized in that: The invention also comprises a limiting member (300), wherein a first cylindrical connecting portion (110) is arranged on a side of the first member (100) facing the second member (200), and a second connecting portion (210) is arranged on a side of the second member (200) facing the first member (100), wherein the second connecting portion (210) is sleeved on the first connecting portion (110) and is rotatably connected to the first connecting portion (110), an annular limiting groove (120) is coaxially arranged on an outer peripheral wall of the first connecting portion (110), and a limiting hole (220) is arranged on the second connecting portion (210), and the limiting member (300) passes through the limiting hole (220) and then extends into the annular limiting groove (120).

3. The expansion locking hinge device according to claim 1 or 2, characterized in that: The locking mechanism comprises: an expansion structure disposed at a hinge center of the first component (100) and the second component (200); a rotating member (410) which is coaxially arranged with the hinge center line of the first member (100) and the second member (200), and is sleeved on the expansion structure. Two rotating members (410) are provided, and the two rotating members (410) are respectively arranged on the sides of the first member (100) and the second member (200) which are away from each other. The two rotating members (410) are respectively fixedly connected to the first member (100) and the second member (200); and Wherein, the expansion structure has a first working state and a second working state. When the expansion structure is in the first working state, the rotating member (410) can only rotate in a preset direction, and the rotation directions of the two rotating members (410) are opposite. When the expansion structure is in the second working state, the rotating member (410) can rotate in any direction around its own rotation center line.

4. The expansion locking hinge device according to claim 3, characterized in that: The expansion structure comprises: Two end covers (420) are provided, and the two end covers (420) are respectively provided at ends of the two rotating members (410) that are away from each other, and the two end covers (420) are respectively rotatably connected to the two rotating members (410); The locking member (430) has an arc-shaped cross section, and its outer diameter at a position corresponding to the rotating member (410) is adapted to the inner side of the rotating member (410). The locking member (430) is arranged at the hinge center of the first component (100) and the second component (200), and is rotatably connected to the first component (100) and the second component (200). Its two ends are respectively slidably connected to the two end covers (420), and it can be moved in a direction close to or away from the axis of the end cover (420) in the first The locking member (430) is configured to reciprocate linearly between a first position and a second position, wherein when the locking member (430) is in the first position, the side wall of the locking member (430) contacts the rotating member (410), so that the rotating member (410) can only rotate in a preset direction; when the locking member (430) is in the second position, the side wall of the locking member (430) does not contact the rotating member (410), so that the rotating member (410) can rotate in any direction around its rotation center line; and A drive assembly is used to drive the lock to perform reciprocating linear motion between the first position and the second position.

5. The expansion locking hinge device according to claim 4, characterized in that: The drive assembly comprises: an expansion member (440), which is arranged on the inner side of the locking member (430), and whose two ends are slidably connected to the end cover (420), and which can make reciprocating linear motion between a third position and a fourth position along the length direction of the locking member (430), and the expansion member (440) is provided with two conical sections (441), and the inner sides of the two ends of the locking member (430) are provided with expansion blocks (432) adapted to the conical sections (441), wherein when the expansion member (440) is in the third position, the conical section (441) corresponds to the expansion block (432), and when the expansion member (440) is in the fourth position, the conical section (441) is separated from the expansion block (432); and A driving unit is used to drive the expansion member (440) to perform reciprocating linear motion between the third position and the fourth position.

6. The expansion locking hinge device according to claim 5, characterized in that: The driving unit comprises: an elastic member (450) which is sleeved on the expansion member (440) and has a tendency to move the expansion member (440) from the fourth position to the third position in a natural state; and The handle (460) is fixedly connected to the expansion member (440) via a drawstring (480).

7. The expansion locking hinge device according to claim 6, characterized in that: A limiting plate (470) is provided on the first component (100) or the second component (200), and the limiting plate (470) is L-shaped. A slot (471) adapted to the handle (460) is provided at a free end of the limiting plate (470), and a limiting portion (461) matched with the slot (471) is provided on the handle (460), and an outer diameter of the limiting portion (461) is greater than a width of the handle (460).

8. The expansion locking hinge device according to any one of claims 4 to 7, characterized in that: A plurality of the locking members (430) are provided, and the plurality of the locking members (430) are evenly arranged around the rotation center line of the rotating member (410).

9. The expansion locking hinge device according to claim 3, characterized in that: The rotating member (410) is a one-way bearing.

Images