Limiting structure of hinge

Abstract

The hinge comprises a bottom plate, a supporting arm and a connecting rod assembly, the two ends of the connecting rod assembly are rotationally connected with the bottom plate and the supporting arm respectively, the supporting arm can be unfolded or folded relative to the bottom plate, and the maximum unfolding angle of the supporting arm relative to the bottom plate is a first angle; a sliding groove is formed in the bottom plate, a sliding shaft is arranged in the sliding groove in a sliding mode, one end of the connecting rod assembly is rotationally connected with the sliding shaft, a limiting assembly used for limiting the sliding stroke of the sliding shaft is detachably arranged between the sliding shaft and the bottom plate, and the limiting assembly comprises a sliding part and a stopping part. The stop part has a first position state, the first position state can enable the maximum unfolding angle of the supporting arm relative to the bottom plate to be a second angle, and the first angle is larger than the second angle. Through the detachable limiting assembly, the purpose that the unfolding angle of the hinge is switched between 180 degrees and 90 degrees can be achieved, and the hinge has the advantages of being high in adaptability and convenient to install.

Description

Technical Field

[0001] This invention belongs to the field of hinge technology, specifically relating to a hinge limiting structure. Background Technology

[0002] Windows are a fundamental component of modern buildings, fulfilling users' needs for lighting, ventilation, and aesthetics. Based on their opening mechanism, existing windows can be broadly categorized into casement windows, sliding windows, and awning windows. Casement windows are a widely used type, where the frame and sash are connected by hinges, allowing the sash to rotate outwards or inwards relative to the frame, thus opening and closing the window.

[0003] Hinges are a crucial component in door and window hardware systems, enabling various opening and closing functions of the window sash. However, current hinge technology generally uses only two types: those that open to 180 degrees or those that open to 90 degrees. For example, when a window is near a wall corner, a hinge with a maximum opening angle of 90 degrees is typically used to prevent the window sash from colliding with the wall during opening. In other words, different types of hinges (90-degree or 180-degree opening hinges) are used for windows with different opening angles. Furthermore, windows are prefabricated before installation, meaning that once the hinge is installed, its maximum opening angle is fixed. If the user needs to change the window's opening angle, the hinge must be replaced, leading to poor applicability and inconvenience. Secondly, if a 180-degree opening hinge needs to be limited to 90 degrees, besides replacing the hinge, an external wind brace can be added. However, adding a wind brace increases the price of the entire system, increases installation time and difficulty, and raises costs. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a hinge limiting structure. Through a detachable limiting component, the hinge's unfolding angle can be switched between 180 degrees and 90 degrees, which has the characteristics of high adaptability and convenient installation.

[0005] To address the aforementioned technical problems, this invention provides a limiting structure for a hinge. The hinge includes a base plate, a support arm, and a connecting rod assembly. Both ends of the connecting rod assembly are rotatably connected to the base plate and the support arm, respectively. The support arm can be unfolded or folded relative to the base plate, and the maximum unfolding angle of the support arm relative to the base plate is a first angle. The base plate is provided with a sliding groove, and a sliding shaft is slidably disposed within the sliding groove. One end of the connecting rod assembly is rotatably connected to the sliding shaft, and a limiting component for limiting the sliding stroke of the sliding shaft is detachably disposed between the sliding shaft and the base plate. The limiting component includes a sliding member and a stop member. The stop member has a first position state, which allows the maximum unfolding angle of the support arm relative to the base plate to be a second angle, where the first angle is greater than the second angle.

[0006] Furthermore, the first angle is 180 degrees and the second angle is 90 degrees.

[0007] Furthermore, the linkage assembly includes a first link, a second link, and a third link. The first link is hinged to the second link, and the first link and the second link are in a scissor-like shape. The first end of the first link is hinged to one end of the base plate, and the second end is hinged to the first end of the third link. The second end of the third link is hinged to the middle of the support arm. The first end of the second link is hinged to one end of the support arm, and the second end of the second link is rotatably connected to the sliding shaft.

[0008] Furthermore, the stop component is a limiting screw, the sliding member is slidably disposed on the base plate and located between the connecting rod assembly and the base plate; one end of the sliding member is provided with a first through hole for the sliding shaft to pass through, and the other end is provided with a limiting groove, the length of the limiting groove being less than the length of the sliding groove; the limiting screw is threadedly connected to the base plate, and the upper end of the limiting screw protrudes into the limiting groove.

[0009] Furthermore, the limiting component also includes a panel that covers the top of the slider, one end of the panel is provided with a second through hole for the sliding shaft to pass through, and the inner side of the panel has a protruding guide portion that passes through the first through hole and is inserted into the sliding groove.

[0010] Furthermore, the stop component includes a stop member and a lifting screw. The sliding member is slidably disposed on the base plate and located between the connecting rod assembly and the base plate. One end of the sliding member is provided with a through hole for the sliding shaft to pass through, and the bottom of the other end is provided with a stop step. The stop member is disposed at the bottom of the base plate by the lifting screw. The upper end of the stop member has a protruding stop portion that passes upward through the base plate and cooperates with the stop step. The stop member can move up and down relative to the base plate so that the stop portion protrudes upward from the base plate or retracts downward into the base plate.

[0011] Furthermore, the lower end of the sliding member is recessed upward to form a clearance that mates with the stop portion. The length of the clearance is less than the length of the sliding groove. The end of the clearance away from the sliding shaft is a stop step. One end of the sliding member has a protruding bottom and a guide rib that inserts into the sliding groove. The lifting screw passes through the base plate from top to bottom and is threaded to one end of the stop. The base plate is also provided with guide posts running vertically. The other end of the stop slides vertically on the guide posts.

[0012] Furthermore, the stop component includes a limiting shaft, a limiting plate, and a panel covering the sliding member. The sliding member is slidably disposed on the base plate and located between the connecting rod assembly and the base plate. One end of the sliding member and the panel is provided with a through hole for the sliding shaft to pass through, and the other end of the sliding member is provided with a limiting groove. The limiting plate is slidably disposed between the base plate and the sliding member. The limiting shaft is fixed to one end of the limiting plate and slidably disposed in the limiting groove. The other end of the limiting plate is provided with a through hole for a screw to pass through. The base plate is provided with a screw hole for threaded connection with the screw. When the support arm rotates to the second angle, the through hole and the screw hole correspond vertically.

[0013] Furthermore, the limiting component also includes a guide member, the stop member is a limiting screw, the sliding member is slidably disposed on the base plate and located between the connecting rod assembly and the base plate; the limiting screw is threadedly connected to one end of the sliding member, the other end of the sliding member is provided with a through hole for the sliding shaft to pass through, the surface of the base plate is provided with a protrusion for the limiting screw to cooperate with and stop the sliding member from sliding toward the sliding groove; the guide member is detachably disposed on the base plate and located inside the protrusion, and guide grooves are formed between both sides of the guide member and the base plate, and guide pieces are slidably disposed in the guide grooves on both sides of the sliding member.

[0014] Furthermore, the stop component is a limiting screw, and the sliding member is slidably disposed at the bottom of the base plate; one end of the sliding member is provided with a through hole for the sliding shaft to pass through from bottom to top, and the other end is provided with a screw hole for threaded connection with the limiting screw; the base plate is also provided with a limiting groove, the length of the limiting groove is less than the length of the sliding groove, and the limiting screw is slidably disposed in the limiting groove.

[0015] The present invention has the following beneficial effects: In this invention, the sliding distance of the sliding shaft is limited by a limiting component on the base plate, thereby limiting the sliding distance of the connecting rod assembly relative to the base plate, thus changing the maximum angle of the outrigger relative to the mounting base. Furthermore, for example, when the opening angle of the window sash relative to the window frame is required to be 90 degrees, a limiting component is installed on the base plate to limit the movement stroke of the sliding shaft relative to the sliding groove, thereby limiting the sliding stroke of the connecting rod assembly when the outrigger rotates outward to open, thus limiting the opening angle. Similarly, when the opening angle of the window sash relative to the window frame is required to be 180 degrees, the limiting component can be removed. This allows for flexible switching between the maximum opening angle of the hinge at the first angle and the second angle (90 degrees / 180 degrees), enabling a single hinge to be flexibly applied to different usage scenarios, thus improving the convenience and adaptability of the hinge.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the hinge in Example 1; Figure 2 This is a schematic diagram of the panel in Example 1; Figure 3 This is an exploded view of the hinge in Example 1; Figure 4 This is a schematic diagram of the hinge after folding in Example 1; Figure 5 This is a schematic diagram of the hinge being limited to opening only 90 degrees in Example 1; Figure 6 This is a schematic diagram of the hinge after it has been opened 180 degrees in Example 1; Figure 7 This is a schematic diagram of the hinge in Example 2; Figure 8 This is an exploded view of the hinge in Example 2; Figure 9 This is a schematic diagram of the hinge being limited to opening only 90 degrees in Example 2; Figure 10 This is a schematic diagram of the hinge after it has been opened 180 degrees in Example 2; Figure 11 This is a schematic diagram of the slider in Example 2; Figure 12 This is a schematic diagram of the slider from another perspective in Embodiment 2; Figure 13 This is a schematic diagram of the stop component in Example 2; Figure 14 This is a schematic diagram of the hinge in Example 3; Figure 15 This is a schematic diagram of the hinge after the panel has been removed in Example 3; Figure 16 This is a schematic diagram of the hinge being opened 180 degrees and the panel being removed in Example 3; Figure 17 This is an exploded view of the hinge in Example 3; Figure 18 This is a schematic diagram of the hinge in Example 4; Figure 19 This is a schematic diagram of the slider in Example 4; Figure 20 This is an exploded view of the hinge in Example 4; Figure 21 This is a partial cross-sectional view of the hinge in Example 4 after it has been limited to opening only 90 degrees; Figure 22 This is a partial cross-sectional view of the hinge after it has been opened 180 degrees in Example 4; Figure 23 This is a schematic diagram of the hinge in Example 5; Figure 24 This is an exploded view of the hinge in Example 5; Figure 25 This is a schematic diagram of the hinge after folding in Example 5; Figure 26 This is a schematic diagram of the hinge being limited to opening only 90 degrees in Example 5; Figure 27 This is a schematic diagram of the hinge after it has been opened 180 degrees in Example 5. Detailed Implementation

[0018] To better understand the technical content of the present invention, the present invention will be further introduced and described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the use of terms such as "first" and "second" in the text is for distinguishing different components, and does not represent the order of events, nor does it limit "first" and "second" to different types.

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] Example 1 like Figures 1 to 6As shown in the figure, the hinge shown in this embodiment includes a base plate 1, a support arm 2 and a connecting rod assembly. The two ends of the connecting rod assembly are rotatably connected to the base plate and the support arm, respectively. Through the connecting rod assembly, the support arm 2 can be unfolded or folded relative to the base plate 1 to realize the opening and closing of the window sash. The maximum unfolding angle of the support arm 2 relative to the base plate 1 is a first angle, which is preferably 180 degrees.

[0021] The linkage assembly includes a first link 3, a second link 4, and a third link 5. The first link 3 and the second link 4 are hinged at their middle parts, forming a scissor shape. The first end of the first link 3 is hinged to one end of the base plate 1, and the second end is hinged to the first end of the third link 5. The second end of the third link 5 is hinged to the middle of the support arm 2. The first end of the second link 4 is hinged to one end of the support arm 2, and the second end of the second link 4 is hinged and slidably mounted on the base plate 1. Thus, when the support arm 2 is extended outward, the linkage assembly extends synchronously. Under the action of the support arm 2 and the first link 3, the second link 4 slides from the end away from the first link 3 toward the first link 3, ultimately achieving the purpose of rotating the support arm 2 180 degrees to open it.

[0022] To enable the second connecting rod 4 to slide on the base plate, a sliding groove 10 extending along the length of the base plate 1 is provided in the middle of the base plate 1. A sliding shaft 11 is slidably mounted in the sliding groove 10, meaning that the sliding shaft 11 can slide back and forth within the range of the sliding groove. The second end of the second connecting rod 4 is rotatably connected to the sliding shaft 11. In one embodiment, in order to limit the maximum extension angle of the support arm, a limiting structure is provided on the hinge. Specifically, a limiting component for limiting the sliding stroke of the sliding shaft 11 is detachably provided between the sliding shaft 11 and the base plate 1. The limiting component includes a sliding member 6 and a stop member. The stop member has a first position state, that is, when the stop member is in the first position state, the maximum extension angle of the support arm 2 relative to the base plate 1 can be a second angle, preferably 90 degrees.

[0023] Understandably, in order to limit the extension angle of the outrigger from the original 180 degrees to 90 degrees, the limiting component controls the sliding stroke of the sliding shaft 11 to half of its original length. That is, the sliding shaft 11 can only slide within half the length of the sliding groove 10. When the outrigger can be extended to 180 degrees, the sliding shaft 11 can slide back and forth within the entire length of the sliding groove 10.

[0024] It is understandable that the first angle can be any obtuse angle, or any other angle, without limitation here, but the first angle is always greater than the second angle.

[0025] In one embodiment, the stop component is a limiting screw 7, and the sliding member 6 is slidably disposed on the base plate 1 and located between the second connecting rod 4 and the base plate 1; one end of the sliding member 6 is provided with a first through hole 61 for the sliding shaft 11 to pass through vertically, and the other end is provided with a limiting groove 62, the length of the limiting groove 62 being less than the length of the sliding groove 10; the limiting screw 7 is threaded from bottom to top onto the base plate 1 and is located on the side of the sliding groove away from the first connecting rod, and the upper end of the limiting screw 7 protrudes into the limiting groove 62; when the hinge does not restrict the opening angle, it is not necessary to install the limiting screw 7, that is, the limiting screw 7 is in an unassembled and separated state at this time, the sliding member 6 slides freely on the base plate 1, and the hinge can be opened 180 degrees (e.g. Figure 6 As shown); when the hinge needs to open to a limited angle (e.g., limited to 90 degrees), the limiting screw 7 is fixed to the base plate 1 from bottom to top through the screw hole 12 on the base plate. That is, the stop component (limiting screw) is in the first position fixed to the base plate at this time. The upper end of the limiting screw 7 passes through the sliding member 6 and slides in the limiting groove 62. In other words, the limiting screw 7 in the first position limits the sliding distance of the sliding member, making the maximum sliding distance between the sliding member and the sliding shaft equal to the length of the limiting groove, thereby limiting the opening angle of the hinge (e.g., ...). Figure 5 As shown in the figure, it serves as a limit.

[0026] Preferably, the length of the limiting groove 62 is half the length of the sliding groove 10.

[0027] Specifically, the limiting component also includes a panel 63 that covers the top of the slider 6. One end of the panel 63 is provided with a second through hole 64 through which the sliding shaft 11 passes. The cover plate 63 covers the slider and the limiting groove, which can be used for dust prevention and decoration.

[0028] Specifically, the inner side of the panel 63 has a protruding guide part 65 that passes through the first through hole 61 and is inserted into the sliding groove 10. The guide part 65 and the sliding groove 10 cooperate to guide the sliding direction of the panel and the sliding member, so as to avoid the sliding member and the panel from deflecting when the limit screw 7 is not installed.

[0029] Example 2 like Figures 7 to 13As shown in the figure, the hinge shown in this embodiment has a structure that is basically the same as that shown in embodiment 1, except that different limiting structures and limiting components are used. The stop component in this embodiment includes a stop member 8 and a lifting screw 66. The sliding member 6 is slidably disposed on the base plate 1 and located between the second connecting rod 4 and the base plate 1. One end of the sliding member 6 is provided with a through hole 60 for the sliding shaft 11 to pass through vertically, and the bottom of the other end is provided with a stop step 70. The stop member 8 is disposed at the bottom of the base plate 1 through the lifting screw 66. The upper end of the stop member 8 has a protruding stop part 81 that passes through the base plate 1 and cooperates with the stop step, that is, a stop part 81 is opened on the base plate 1 for stopping. The opening 14 through which the stop 81 passes upward utilizes the cooperation between the stop and the base plate to position the stop in the circumferential direction. Because the lifting screw 6 and the stop 8 are connected by a thread, the stop 8 can move up and down relative to the base plate 1 during the loosening or tightening of the lifting screw. This allows the stop 81 to protrude upward from the base plate 1 or retract downward into the base plate 1. After protruding from the base plate, the stop 81 is located inside the stop step. At this point, the stop 8 and the stop 81 are in the first limited position, stopping and limiting the sliding of the sliding member 6, thus limiting the sliding distance of the sliding member and consequently limiting the opening angle of the hinge (e.g., ...). Figure 9 As shown), it serves as a limit; and when the stop part 81 retracts into the base plate, it releases the limit on the sliding member, that is, at this time the stop part 8 and the stop part 81 are in the second position without limitation, and the sliding member can slide freely under the action of the sliding shaft. At this time, the hinge can be opened 180 degrees (as shown). Figure 10 (As shown); Here, the lifting screw is used to adjust the limit, which allows the hinge opening angle to be adjusted at any time without assembling or disassembling the limit component parts, simplifying installation and operation.

[0030] Specifically, the lower end of the slider 6 is recessed upward to form a clearance 67 that cooperates with the stop 81. The length of the clearance 67 is less than the length of the sliding groove 10, so that after the stop 81 protrudes into the clearance 67 and forms a limit, the slider can slide back and forth within the range of the clearance 67 to limit the maximum opening angle of the hinge. The end of the clearance 67 away from the sliding shaft 11 is a stop step. One end of the slider 6 has a protruding bottom and a guide rib 68 that is inserted into the sliding groove. The guide rib 68 and the sliding groove 10 cooperate to guide the sliding direction of the slider 6, so as to avoid the slider and the panel from deflecting when the stop is released. The lifting screw 66 passes through the base plate 1 from top to bottom and is threaded to one end of the stop 8. The base plate 1 is also provided with guide posts 82 passing through it vertically. The other end of the stop 8 slides vertically on the guide posts 82 to guide the vertical movement of the stop 8.

[0031] Example 3 like Figures 14 to 17As shown in the figure, the hinge shown in this embodiment has a structure that is basically the same as that shown in embodiment 1, except that different limiting structures and limiting components are used. The stop component in this embodiment includes a limiting shaft 92, a limiting piece 93, and a panel 63 covering the sliding member 6. The sliding member 6 is slidably disposed on the base plate 1 and located between the second connecting rod 4 and the base plate 1. One end of the sliding member 6 and the panel 63 is provided with a through hole 60 for the sliding shaft 11 to pass through, and the other end of the sliding member 6 is provided with a limiting groove 62. The limiting piece 93 is slidably disposed between the base plate 1 and the sliding member 6, and the limiting shaft 92 is fixed to the limiting piece 63. One end of the limiting plate 93 is slidably disposed within the limiting groove 62, and the other end of the limiting plate 93 is provided with a through hole 95 for the screw 94 to pass through. The base plate 1 is provided with a screw hole 12 for threaded connection with the screw 94. When the support arm 2 is rotated open to the second angle, the through hole 95 is exactly aligned with the screw hole 12. When the hinge does not restrict the opening angle, the screw is only installed in the screw hole 12 and does not pass through the through hole 95. In the initial state, the sliding member 6 is tripped by the limiting shaft 92, causing the limiting plate 93 to slide on the base plate 1. That is, at this time, the limiting plate 93 and the limiting shaft 92 are in a free state without restriction. At this time, the hinge can be opened 180 degrees (e.g., Figure 16 (As shown); when the hinge needs to open to the limit angle, the limit plate 93 is fixed to the base plate 1 by installing screws 94 at the through hole 95 of the limit plate 93 and the screw hole 12 of the base plate 1. That is, at this time, the limit plate 93 and the limit shaft 92 are in the first position of the limit, and the limit shaft 92 is restricted within the limit groove 62 of the sliding member 6 (as shown). Figure 15 As shown in the figure, the sliding distance of the slider 6 is limited, thereby limiting the opening angle of the hinge and playing a limiting role, so that the maximum opening angle of the arm is limited to the second angle.

[0032] Example 4 like Figures 18 to 22As shown in the figure, the hinge shown in this embodiment has a structure that is basically the same as that shown in embodiment 1, except that different limiting structures and limiting components are used. The limiting component in this embodiment also includes a guide 71, a stopping component is a limiting screw 7, and a sliding member 6 is slidably disposed on the base plate 1 and located between the second connecting rod 4 and the base plate 1. The limiting screw 7 is threadedly connected to one end of the sliding member 6, and the other end of the sliding member 6 is provided with a through hole 60 for the sliding shaft 11 to pass through. The surface of the base plate 1 is raised with a limiting screw 7 to stop the sliding member 6 from facing the sliding groove 10. The sliding protrusion 13 is located inside the limiting screw 17; the guide member 71 is detachably mounted on the base plate 1 and located inside the protrusion 13, and guide grooves are formed between both sides of the guide member 13 and the base plate 1. The two sides of the sliding member 6 are bent inward and have guide plates 69 that slide in the guide grooves, so as to guide and position the sliding member 6 and prevent the sliding member from deflecting during use; when the hinge does not restrict the opening angle, the limiting screw 7 does not need to be installed, and the sliding member 6 slides freely on the base plate. At this time, the hinge can be opened 180 degrees (e.g., Figure 23 (As shown); When the hinge needs to open to the limit angle, the limit screw 7 is screwed into the screw hole at one end of the slider 6, and the lower end of the limit screw 7 protrudes from the slider and engages with the protrusion 13. When the slider 6 slides towards the slide groove, it drives the limit screw 7 to slide to the outside of the protrusion 13, where the limit screw 7 abuts against the protrusion 13 (as shown). Figure 22 As shown), the limiting screw 7 is in the first limiting position, restricting the sliding distance of the slider 6, and thus limiting the opening angle of the hinge (as shown). Figure 13 As shown in the figure, it serves as a limit.

[0033] Example 5 like Figures 23 to 27 As shown in the figure, the hinge shown in this embodiment has a structure that is basically the same as that shown in embodiment 1, except that different limiting structures and limiting components are used. In this embodiment, the stop component is a limiting screw 7, and the sliding member 6 is slidably disposed on the bottom of the base plate 1. One end of the sliding member 6 is provided with a through hole 60 for the sliding shaft 11 to pass through from bottom to top, and the other end is provided with a screw hole 12 that is threadedly connected to the limiting screw 7. The base plate 1 is also provided with a limiting groove 62, the length of which is less than the length of the sliding groove 10. The limiting screw 7 is slidably disposed in the limiting groove 62. When the hinge does not restrict the opening angle, it is not necessary to install the limiting screw 7, that is, the limiting screw 7 is in an unassembled and separated state at this time, and the sliding member 6 can slide freely under the base plate 1. At this time, the hinge can be opened 180 degrees (e.g., Figure 27 (As shown); when the hinge needs to open to the limit angle, the limit screw 7 passes through the limit groove 62 on the base plate 1 and is screwed into the screw hole 12 of the slider. When the slider 6 slides, it drives the limit screw 7 to slide within the limit groove 62 (as shown). Figure 26As shown), the limiting screw 7 is in the first limiting position, restricting the sliding distance of the sliding component, and thus limiting the opening angle of the hinge (as shown). Figure 26 As shown in the figure, it serves as a limit.

[0034] Preferably, the length of the limiting groove 62 is half the length of the sliding groove 10.

[0035] Preferably, the limiting groove 62 is located at the end of the base plate away from the first connecting rod.

[0036] In one embodiment, the end of the slider 6 away from the limiting screw 7 has a protruding guide portion 65 placed in the sliding groove. The guide portion 65 and the sliding groove 10 cooperate to guide the sliding direction of the slider, so as to avoid the slider from deflecting when the limiting screw 7 is not installed.

[0037] Specifically, a support member 15 fitted on the sliding shaft 11 is provided between the second link 4 and the base plate 1 to prevent a large gap between the second link 4 and the base plate 1 from affecting its movement.

[0038] The technical solutions provided by the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of the present invention. The descriptions of the embodiments above are only for helping to understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A limiting structure for a hinge, the hinge comprising a base plate, a support arm, and a connecting rod assembly, wherein both ends of the connecting rod assembly are rotatably connected to the base plate and the support arm respectively, the support arm being expandable or foldable relative to the base plate, and the maximum expansion angle of the support arm relative to the base plate being a first angle; characterized in that, The base plate is provided with a sliding groove, and a sliding shaft is slidably disposed in the sliding groove. One end of the connecting rod assembly is rotatably connected to the sliding shaft, and a limiting component for limiting the sliding stroke of the sliding shaft is detachably disposed between the sliding shaft and the base plate. The limiting component includes a sliding member and a stop member. The stop member has a first position state, and the first position state allows the maximum unfolding angle of the support arm relative to the base plate to be a second angle, wherein the first angle is greater than the second angle.

2. The limiting structure of the hinge as described in claim 1, characterized in that, The first angle is 180 degrees, and the second angle is 90 degrees.

3. The limiting structure of the hinge as described in claim 2, characterized in that, The linkage assembly includes a first link, a second link, and a third link. The first link is hinged to the second link, and the first link and the second link are in a scissor-like shape. The first end of the first link is hinged to one end of the base plate, and the second end is hinged to the first end of the third link. The second end of the third link is hinged to the middle of the support arm. The first end of the second link is hinged to one end of the support arm, and the second end of the second link is rotatably connected to the sliding shaft.

4. The limiting structure of the hinge as described in any one of claims 1-3, characterized in that, The stop component is a limiting screw, and the sliding member is slidably disposed on the base plate and located between the connecting rod assembly and the base plate; one end of the sliding member is provided with a first through hole for the sliding shaft to pass through, and the other end is provided with a limiting groove, the length of the limiting groove being less than the length of the sliding groove; the limiting screw is threadedly connected to the base plate, and the upper end of the limiting screw protrudes into the limiting groove.

5. The limiting structure of the hinge as described in claim 4, characterized in that, The limiting component also includes a panel that covers the top of the slider. One end of the panel is provided with a second through hole for the sliding shaft to pass through, and the inner side of the panel has a protruding guide portion that passes through the first through hole and is inserted into the sliding groove.

6. The limiting structure of the hinge as described in any one of claims 1-3, characterized in that, The stop component includes a stop member and a lifting screw. The sliding member is slidably disposed on the base plate and located between the connecting rod assembly and the base plate. One end of the sliding member is provided with a through hole for the sliding shaft to pass through, and the bottom of the other end is provided with a stop step. The stop member is disposed at the bottom of the base plate by the lifting screw. The upper end of the stop member has a protruding stop portion that passes upward through the base plate and cooperates with the stop step. The stop member can move up and down relative to the base plate so that the stop portion protrudes upward from the base plate or retracts downward into the base plate.

7. The limiting structure of the hinge as described in claim 6, characterized in that, The lower end of the sliding member is recessed upward to form a clearance that mates with the stop. The length of the clearance is less than the length of the sliding groove. The end of the clearance away from the sliding shaft is a stop step. One end of the sliding member has a protruding bottom and a guide rib that inserts into the sliding groove. The lifting screw passes through the base plate from top to bottom and is threaded to one end of the stop. The base plate is also provided with guide posts running vertically. The other end of the stop slides vertically on the guide posts.

8. The limiting structure of the hinge as described in any one of claims 1-3, characterized in that, The stop component includes a limiting shaft, a limiting plate, and a panel covering the sliding member. The sliding member is slidably disposed on the base plate and located between the connecting rod assembly and the base plate. One end of the sliding member and the panel is provided with a through hole for the sliding shaft to pass through, and the other end of the sliding member is provided with a limiting groove. The limiting plate is slidably disposed between the base plate and the sliding member. The limiting shaft is fixed to one end of the limiting plate and slidably disposed in the limiting groove. The other end of the limiting plate is provided with a through hole for a screw to pass through. The base plate is provided with a screw hole for threaded connection with the screw. When the support arm rotates to the second angle, the through hole and the screw hole correspond vertically.

9. The limiting structure of the hinge as described in any one of claims 1-3, characterized in that, The limiting assembly further includes a guide member, the stop member is a limiting screw, the sliding member is slidably disposed on the base plate and located between the connecting rod assembly and the base plate; the limiting screw is threadedly connected to one end of the sliding member, the other end of the sliding member is provided with a through hole for the sliding shaft to pass through, the surface of the base plate is provided with a protrusion for the limiting screw to cooperate with and stop the sliding member from sliding toward the sliding groove; the guide member is detachably disposed on the base plate and located inside the protrusion, and guide grooves are formed between both sides of the guide member and the base plate, and guide pieces are slidably disposed in the guide grooves on both sides of the sliding member.

10. The limiting structure of the hinge as described in any one of claims 1-3, characterized in that, The stop component is a limiting screw, and the sliding member is slidably disposed at the bottom of the base plate; one end of the sliding member is provided with a through hole for the sliding shaft to pass through from bottom to top, and the other end is provided with a screw hole for threaded connection with the limiting screw; the base plate is also provided with a limiting groove, the length of the limiting groove is less than the length of the sliding groove, and the limiting screw is slidably disposed in the limiting groove.

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