Hidden hinge with door stop function

Abstract

The application provides a hidden hinge with door stopping function, which comprises a door leaf shell assembly, a door frame shell assembly, a connecting plate assembly and a hydraulic device, the inner wall of the door leaf shell assembly is provided with guiding and limiting structures for limiting and stopping the door leaf when the door leaf is opened, the guiding and limiting structures comprise L-shaped guiding grooves arranged on the inner wall of the door leaf shell assembly, a guide pulley which can slide along the L-shaped guiding grooves, and a first connecting rod and a second connecting rod which are hinged to the guide pulley at one end, the other end of the first connecting rod is hinged to the connecting plate assembly, and the other end of the second connecting rod is hinged to the hydraulic device; when the door is opened, the connecting plate assembly drives the guide pulley to slide from one end to the other end of the L-shaped guiding groove through the first connecting rod, and the second connecting rod is limited, so that the door leaf is limited; the hidden hinge with door stopping function provided by the application overcomes the defect that the existing hidden hinge does not have the door stopping function.

Description

Technical Field

[0001] This invention relates to the field of hydraulic hinges, and in particular to a concealed hinge with a door stop function. Background Technology

[0002] Traditional door hinges are folding hinges, where the main hinge and auxiliary hinge are hinged together and fixed to the door frame and door panel. They do not provide a buffer when the door closes, nor can they control the closing speed. When the door closes, if there is a large external force, the door panel and door frame collide violently, producing a loud noise. This violent collision can also create excessive interaction forces between the door panel and door frame, potentially damaging them, affecting their lifespan, and posing certain safety hazards. To avoid these shortcomings of folding hinges, door hinges with a buffering effect when closing have gradually emerged in the market.

[0003] For example, patent number CN211173598U discloses a concealed hinge, which includes a first base, a second base, and a rocker arm assembly. The first base is installed in a side groove of the door frame, with first connectors at both ends and a first receiving groove containing a first sliding groove. The second base is installed in a side groove of the door panel, with second connectors at both ends and a second receiving groove containing a second sliding groove. The rocker arm assembly connects the first and second bases, with a first pivot and a second pivot at both ends. Slider blocks are located at both ends of the first and second pivots, with the sliders at the ends of the first pivots positioned in the first sliding groove and the sliders at the ends of the second pivots positioned in the second sliding groove. While this structure achieves the function of a concealed hinge, it cannot stop the door when it is opened, lacking a door-stopping function, making it inconvenient to use. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] The problem to be solved by the present invention is to provide a hidden hinge with a door stop function, so as to overcome the defect of existing hidden hinges that do not have a door stop function.

[0006] (II) Technical Solution

[0007] To address the aforementioned technical problem, the present invention provides a concealed hinge with a door-stopping function, comprising a door leaf housing assembly, a door frame housing assembly, a connecting plate assembly for connecting the door leaf housing assembly and the door frame housing assembly, and a hydraulic device fixed to one side of the door leaf housing assembly. One or both sides of the inner wall of the door leaf housing assembly are provided with a guide limiting structure for stopping the door when it is opened. The guide limiting structure includes an L-shaped guide groove on the inner wall of the door leaf housing assembly, a guide pulley that can slide along the L-shaped guide groove, and a first connecting rod and a second connecting rod, one end of which is hinged to the guide pulley. The other end of the first connecting rod is hinged to the connecting plate assembly, and the other end of the second connecting rod is hinged to the hydraulic device. When the door is opened, the connecting plate assembly drives the guide pulley to slide from one end of the L-shaped guide groove to the other end via the first connecting rod, and the second connecting rod is stopped, thereby stopping the door.

[0008] Furthermore, the L-shaped guide groove includes a first guide groove and a second guide groove arranged vertically. The first guide groove and the second guide groove are connected by an arc-shaped guide wall. A stop is provided on one side of the second guide groove. Under the action of the arc-shaped guide wall, the guide pulley can slide from the first guide groove into the second guide groove, and the stop is used to limit the guide pulley.

[0009] Furthermore, the connecting plate assembly includes a first connecting plate located within the door leaf housing assembly, one end of the first connecting plate being rotatably connected to the door leaf housing assembly, and the first connecting rods being symmetrically hinged to both sides of the first connecting plate.

[0010] Furthermore, the connecting plate assembly also includes a second connecting plate and a third connecting plate hinged to each other at their middle parts, and a fourth connecting plate hinged within the door frame housing assembly. One end of the second connecting plate is hinged to the first connecting plate, and the other end is hinged to the door frame housing assembly. One end of the third connecting plate is hinged to the fourth connecting plate, and the other end passes through the second connecting plate and is hinged to the door leaf housing assembly.

[0011] Furthermore, the connecting plate assembly also includes a first fixing seat disposed on the door frame housing assembly and a fifth connecting plate symmetrically disposed on both sides of the first fixing seat. The end of the first fixing seat away from the door frame housing assembly is hinged to the door leaf housing assembly; one end of the fifth connecting plate is hinged to the first connecting plate, and the other end is hinged to the first fixing seat.

[0012] Furthermore, the connecting plate assembly also includes a second fixing seat disposed on the door frame housing assembly, a sixth connecting plate hinged to the second fixing seat, a seventh connecting plate hinged within the door leaf housing assembly, and an eighth connecting plate hinged in the middle to the first connecting plate. One end of the first connecting plate is hinged to the seventh connecting plate, and the other end is hinged to the second fixing seat. One end of the eighth connecting plate is hinged to the sixth connecting plate, and the other end passes through the first connecting plate and is hinged to the door leaf housing assembly.

[0013] Furthermore, the door leaf housing assembly includes a first outer shell and a first inner seat installed inside the first outer shell. The L-shaped guide groove is symmetrically arranged on the inner wall of the first inner seat. The hydraulic device includes a mounting base fixed to the outside of the first inner seat, a hydraulic telescopic rod telescopically installed in the mounting base, and springs symmetrically installed on both sides of the hydraulic telescopic rod. One end of the hydraulic telescopic rod is fixed with a sliding rod, one end of the spring abuts against the mounting base, and the other end abuts against the sliding rod. One end of the second connecting rod passes through the first inner seat and is hinged to the end of the sliding rod. The mounting base is provided with a through groove for the sliding rod to slide.

[0014] Furthermore, the door frame housing assembly includes a second outer shell and a second inner seat mounted inside the second outer shell, with the second connecting plate and the fourth connecting plate hinged to the second inner seat.

[0015] Furthermore, the door frame housing assembly includes a fixing plate, which is provided with a first waist-shaped groove for adjusting the lateral position and a second waist-shaped groove for adjusting the vertical position, and the first fixing seat is integrally disposed on the fixing plate.

[0016] Furthermore, the door frame housing assembly includes an outer frame plate and an inner frame plate that is installed inside the outer frame plate and is height-adjustable. The second fixing seat is fixed to the inner frame plate, and the outer frame plate is provided with a third waist-shaped groove for adjusting the height of the inner frame plate.

[0017] (III) Beneficial Effects

[0018] This invention provides a concealed hinge with a door-stopping function. It incorporates a guide and limiting structure. Through the cooperation of an L-shaped guide groove, a guide pulley, a first connecting rod, and a second connecting rod, when the door is opened, the guide pulley slides from the first guide groove to the second guide groove under the action of the arc-shaped guide wall. A stop portion limits the guide pulley's position, and the second connecting rod is also limited, restricting the return of the hydraulic device, thereby fixing the door in place and enabling the door-stopping function for greater convenience. This overcomes the deficiency of existing concealed hinges that lack a door-stopping function. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of a hidden hinge with a door stop function, as described in Embodiment 1.

[0021] Figure 2 An exploded view of a hidden hinge with a door stop function in Embodiment 1;

[0022] Figure 3 This is a perspective view of a hidden hinge guide and limiting structure with door stop function according to Embodiment 1;

[0023] Figure 4 This is an exploded view of a hidden hinge guide and limiting structure with door stop function according to Embodiment 1;

[0024] Figure 5 This is a perspective view of an L-shaped guide groove for a concealed hinge with a door stop function, as described in Embodiment 1.

[0025] Figure 6 This is an exploded view of a hidden hinge connecting plate assembly with door stop function according to Embodiment 1;

[0026] Figure 7 This is a perspective view of a concealed hinge hydraulic device with door stop function according to Embodiment 1;

[0027] Figure 8 This is a cross-sectional view of a concealed hinge hydraulic device with door stop function according to Embodiment 1;

[0028] Figure 9 This is a perspective view of a concealed hinged door with a door stop function when closed, as described in Embodiment 1.

[0029] Figure 10 This is a perspective view of a hidden hinge with a door stop function, as shown in Embodiment 2.

[0030] Figure 11 This is an exploded view of a hidden hinge with a door stop function in Embodiment 2;

[0031] Figure 12 This is a perspective view of a hidden hinge connecting plate assembly with a door stop function according to Embodiment 2;

[0032] Figure 13 This is an exploded view of a hidden hinge connecting plate assembly with door stop function according to Embodiment 2;

[0033] Figure 14 This is a perspective view of a concealed hinged door with a door stop function when closed, as shown in Embodiment 2.

[0034] Figure 15 This is a perspective view of a hidden hinge with a door stop function, as described in Embodiment 3.

[0035] Figure 16 An exploded view of a hidden hinge with a door stop function in Embodiment 3;

[0036] Figure 17 This is a perspective view of a hidden hinge connecting plate assembly with a door stop function according to Embodiment 3;

[0037] Figure 18 This is an exploded view of a concealed hinge connecting plate assembly with door stop function according to Embodiment 3;

[0038] Figure 19 This is a perspective view of a concealed hinged door with a door stop function when closed, as described in Embodiment 3.

[0039] The component names corresponding to the various reference numerals in the figure are as follows: 1. Door leaf housing assembly; 11. First outer shell; 12. First inner seat; 2. Door frame housing assembly; 21. Second outer shell; 22. Second inner seat; 23. Fixing plate; 24. Outer frame plate; 25. Inner frame plate; 201. First fixing seat; 202. Second fixing seat; 231. First waist-shaped groove; 232. Second waist-shaped groove; 251. Third waist-shaped groove; 3. Connecting plate assembly; 31. First connecting plate; 32. Second connecting plate; 33. 34. Third connecting plate; 35. Fourth connecting plate; 36. Fifth connecting plate; 37. Sixth connecting plate; 38. Seventh connecting plate; 39. Eighth connecting plate; 40. Hydraulic device; 41. Mounting base; 42. Hydraulic telescopic rod; 43. Spring; 44. Sliding rod; 411. Through groove; 5. Guide limiting structure; 51. L-shaped guide groove; 52. Guide pulley; 53. First connecting rod; 54. Second connecting rod; 511. First guide groove; 512. Second guide groove; 513. Arc-shaped guide wall; 514. Stop. Detailed Implementation

[0040] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0041] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0043] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0044] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0045] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings. Example 1:

[0046] See Figures 1 to 9 This embodiment provides a hidden hinge with a door stop function, including a door leaf housing assembly 1, a door frame housing assembly 2, a connecting plate assembly 3 for connecting the door leaf housing assembly 1 and the door frame housing assembly 2, and a hydraulic device 4 fixed on one side of the door leaf housing assembly 1, wherein the door leaf housing assembly 1 and the hydraulic device 4 are installed on the door leaf, and the door frame housing assembly 2 is installed on the door frame.

[0047] See Figures 1 to 4 One or both sides of the inner wall of the door leaf housing assembly 1 are provided with guide and limiting structures 5 for limiting and stopping the door leaf when it is opened. In order to ensure the stability of the structure, in this embodiment, guide and limiting structures 5 are provided on both sides of the inner wall of the door leaf housing assembly 1, resulting in a good door stopping effect. The guide and limiting structure 5 includes an L-shaped guide groove 51 symmetrically arranged on the inner wall of the door leaf housing assembly 1, a guide pulley 52 that can slide along the L-shaped guide groove 51, and a first connecting rod 53 and a second connecting rod 54, one end of which is respectively hinged to the guide pulley 52. ​​The size of the guide pulley 52 is adapted to the L-shaped guide groove 51. The first connecting rod 53 is used to connect the connecting plate assembly 3, and the other end of the first connecting rod 53 is hinged to the connecting plate assembly 3. The second link 54 is used to connect the hydraulic device 4, and the other end of the second link 54 is hinged to the hydraulic device 4. When the door is opened (i.e. the door leaf is fully opened and the door leaf housing assembly 1 and the door frame housing assembly 2 are arranged vertically), the connecting plate assembly 3 drives the guide pulley 52 to slide from one end of the L-shaped guide groove 51 to the other end of the L-shaped guide groove 51 through the first link 53. The guide pulley 52 is limited, and at this time the second link 54 is limited, so the door leaf is limited and fixed.

[0048] See Figure 1 and Figure 2 The door leaf housing assembly 1 includes a first outer shell 11 and a first inner seat 12 installed inside the first outer shell 11. L-shaped guide grooves 51 are symmetrically arranged on the inner wall of the first inner seat 12. The door frame housing assembly 2 includes a second outer shell 21 and a second inner seat 22 installed inside the second outer shell 21. A connecting plate assembly 3 connects the first inner seat 12 and the second inner seat 22.

[0049] See Figure 3 , Figure 7 and Figure 8 The hydraulic device 4 includes a mounting base 41 fixed to the outside of the first inner seat 12, a hydraulic telescopic rod 42 telescopically mounted within the mounting base 41, and springs 43 symmetrically mounted on both sides of the hydraulic telescopic rod 42. The mounting base 41 has grooves for accommodating the hydraulic telescopic rod 42 and the two springs 43 respectively. A sliding rod 44 is fixed to one end of the hydraulic telescopic rod 42. One end of each spring 43 abuts against the mounting base 41, and the other end abuts against the sliding rod 44. One end of the second connecting rod 54 passes through the first inner seat 12 and is hinged to the end of the sliding rod 44. The mounting base 41 has a through groove 411 for the sliding rod 44 to slide. For aesthetic purposes, a cover is fixed to the first outer shell 11 to cover the mounting base 41 and the second connecting rod 54. During door opening, the connecting plate assembly 3 drives the second connecting rod 54, which in turn shortens the hydraulic telescopic rod 42 via the sliding rod 44, simultaneously compressing the two springs 43.

[0050] See Figure 4and Figure 5 The L-shaped guide groove 51 includes a vertically arranged first guide groove 511 and a second guide groove 512. The first guide groove 511 and the second guide groove 512 are connected and transitionally connected by an arc-shaped guide wall 513. A stop part 514 is provided on one side of the second guide groove 512. Under the action of the arc-shaped guide wall 513, the guide pulley 52 can slide from the first guide groove 511 into the second guide groove 512, and the stop part 514 limits the guide pulley 52. ​​When the door is opened, under the action of the arc-shaped guide wall, the guide pulley can slide from the first guide groove into the second guide groove, and the stop part limits the guide pulley. The second connecting rod is limited, restricting the spring 43 of the hydraulic device from returning to its original position, thereby fixing the door leaf and giving it a door-stopping function. When the door is closed, pushing the door leaf will drive the guide pulley 52 to slide from the second guide groove 512 to the first guide groove 511. Under the return of the spring 43 of the hydraulic device, the door leaf automatically closes (e.g., Figure 9 ).

[0051] See Figure 2 and Figure 6 The connecting plate assembly 3 includes a first connecting plate 31 located inside the door leaf housing assembly 1. One end of the first connecting plate 31 is hinged to the door leaf housing assembly 1, and first connecting rods 53 are symmetrically hinged to both sides of the middle portion of the first connecting plate 31. The connecting plate assembly 3 also includes a second connecting plate 32 and a third connecting plate 33 hinged to each other in the middle, and a fourth connecting plate 34 hinged inside the door frame housing assembly 2. One end of the second connecting plate 32 is hinged to the first connecting plate 31, and the other end of the second connecting plate 32 is hinged to the door frame housing assembly 2. One end of the third connecting plate 33 is hinged to the fourth connecting plate 34, and the other end passes through the second connecting plate 32 and is hinged to the door leaf housing assembly 1. Both the second connecting plate 32 and the fourth connecting plate 34 are hinged to the second inner seat 22. Example 2:

[0052] The difference between the hidden hinge with door stop function provided in this embodiment and Embodiment 1 is that the structure of the door frame housing assembly 2 is different, and the structure of the connecting plate assembly 3 is different.

[0053] See Figures 10 to 14 In this embodiment, the door frame housing assembly 2 includes a fixing plate 23. The fixing plate 23 is provided with a first waist-shaped groove 231 for adjusting the lateral position and a second waist-shaped groove 232 for adjusting the vertical position. The first fixing seat 201 is integrally disposed on the fixing plate 23.

[0054] See Figure 12 and Figure 13The connecting plate assembly 3 includes a first connecting plate 31 located inside the door leaf housing assembly 1, a first fixing seat 201 disposed on the door frame housing assembly 2, and a fifth connecting plate 35 symmetrically disposed on both sides of the first fixing seat 201. One end of the first connecting plate 31 is hinged to the door leaf housing assembly 1, and the end of the first fixing seat 201 away from the door frame housing assembly 2 is hinged to the door leaf housing assembly 1. One end of the fifth connecting plate 35 is hinged to the first connecting plate 31, and the other end is hinged to the end of the first fixing seat 201 near the door frame housing assembly 2. Example 3:

[0055] The difference between the hidden hinge with door stop function provided in this embodiment and Embodiment 1 is that the structure of the door frame housing assembly 2 is different, and the structure of the connecting plate assembly 3 is different.

[0056] See Figures 15 to 19 In this example, the door frame housing assembly 2 includes an outer frame plate 24 and an inner frame plate 25 installed inside the outer frame plate 24 and whose height is adjustable. The second fixing seat 202 is fixed on the inner frame plate 25. The outer frame plate 24 is provided with a third waist-shaped groove 251 for adjusting the height of the inner frame plate 25.

[0057] See Figure 17 and Figure 18 The connecting plate assembly 3 includes a first connecting plate 31 located inside the door leaf housing assembly 1, a second fixing seat 202 disposed on the door frame housing assembly 2, a sixth connecting plate 36 hinged to the second fixing seat 202, a seventh connecting plate 37 hinged inside the door leaf housing assembly 1, and an eighth connecting plate 38 hinged to the first connecting plate 31 in the middle. One end of the first connecting plate 31 is hinged to the seventh connecting plate 37, and the other end is hinged to the second fixing seat 202. One end of the eighth connecting plate 38 is hinged to the sixth connecting plate 36, and the other end passes through the first connecting plate 31 and is hinged to the door leaf housing assembly 1.

[0058] The present invention provides a concealed hinge with a door stop function, which adopts the connecting plate assembly structure in Embodiment 1. After the door is opened, the gap between the door leaf housing assembly and the door frame housing assembly is relatively large (e.g., Figure 1 The connection plate assembly structure of Embodiments 2 and 3 is adopted, and the gap between the door leaf housing assembly and the door frame housing assembly is small after the door is opened (e.g., Figure 10 and Figure 15 ( ), which can be selected according to needs; at the same time, the three embodiments provide different door frame housing components, which can be adapted to various door frames and have a wider range of applications.

[0059] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0060] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A concealed hinge with a door stop function, comprising a door leaf housing assembly (1), a door frame housing assembly (2), a connecting plate assembly (3) for connecting the door leaf housing assembly (1) and the door frame housing assembly (2), and a hydraulic device (4) fixed to one side of the door leaf housing assembly (1), characterized in that: One or both sides of the inner wall of the door leaf housing assembly (1) are provided with a guide limiting structure (5) for limiting and stopping the door leaf when it is opened. The guide limiting structure (5) includes an L-shaped guide groove (51) provided on the inner wall of the door leaf housing assembly (1), a guide pulley (52) that can slide along the L-shaped guide groove (51), and a first connecting rod (53) and a second connecting rod (54) with one end hinged to the guide pulley (52). The other end of the first connecting rod (53) is hinged to the connecting plate assembly (3), and the other end of the second connecting rod (54) is hinged to the hydraulic device (4). When the door is opened, the connecting plate assembly (3) drives the guide pulley (52) to slide from one end of the L-shaped guide groove (51) to the other end through the first connecting rod (53), and the second connecting rod (54) is limited, thereby limiting the door leaf.

2. The concealed hinge with door-stopping function as described in claim 1, characterized in that: The L-shaped guide groove (51) includes a first guide groove (511) and a second guide groove (512) arranged vertically. The first guide groove (511) and the second guide groove (512) are connected by an arc-shaped guide wall (513). A stop (514) is provided on one side of the second guide groove (512). Under the action of the arc-shaped guide wall (513), the guide pulley (52) can slide from the first guide groove (511) into the second guide groove (512), and the stop (514) limits the guide pulley (52).

3. The concealed hinge with door-stopping function as described in claim 1, characterized in that: The connecting plate assembly (3) includes a first connecting plate (31) located inside the door leaf housing assembly (1). One end of the first connecting plate (31) is rotatably connected to the door leaf housing assembly (1), and the first connecting rod (53) is symmetrically hinged to both sides of the first connecting plate (31).

4. The concealed hinge with door-stopping function as described in claim 3, characterized in that: The connecting plate assembly (3) further includes a second connecting plate (32) and a third connecting plate (33) hinged together in the middle, and a fourth connecting plate (34) hinged in the door frame housing assembly (2). One end of the second connecting plate (32) is hinged to the first connecting plate (31), and the other end is hinged to the door frame housing assembly (2). One end of the third connecting plate (33) is hinged to the fourth connecting plate (34), and the other end passes through the second connecting plate (32) and is hinged to the door leaf housing assembly (1).

5. The concealed hinge with door-stopping function as described in claim 3, characterized in that: The connecting plate assembly (3) further includes a first fixing seat (201) disposed on the door frame housing assembly (2) and a fifth connecting plate (35) symmetrically disposed on both sides of the first fixing seat (201). The first fixing seat (201) is hinged to the door leaf housing assembly (1) at one end away from the door frame housing assembly (2). One end of the fifth connecting plate (35) is hinged to the first connecting plate (31), and the other end is hinged to the first fixing seat (201).

6. The concealed hinge with door-stopping function as described in claim 3, characterized in that: The connecting plate assembly (3) further includes a second fixing seat (202) disposed on the door frame housing assembly (2), a sixth connecting plate (36) hinged to the second fixing seat (202), a seventh connecting plate (37) hinged in the door leaf housing assembly (1), and an eighth connecting plate (38) hinged in the middle to the first connecting plate (31). One end of the first connecting plate (31) is hinged to the seventh connecting plate (37), and the other end is hinged to the second fixing seat (202). One end of the eighth connecting plate (38) is hinged to the sixth connecting plate (36), and the other end passes through the first connecting plate (31) and is hinged to the door leaf housing assembly (1).

7. The concealed hinge with door-stopping function as described in any one of claims 4 to 6, characterized in that: The door housing assembly (1) includes a first outer shell (11) and a first inner seat (12) installed inside the first outer shell (11). The L-shaped guide groove (51) is symmetrically arranged on the inner wall of the first inner seat (12). The hydraulic device (4) includes a mounting base (41) fixed on the outside of the first inner seat (12), a hydraulic telescopic rod (42) telescopically mounted in the mounting base (41), and springs (43) symmetrically mounted on both sides of the hydraulic telescopic rod (42). One end of the hydraulic telescopic rod (42) is fixed with a sliding rod (44). One end of the spring (43) abuts against the mounting base (41), and the other end abuts against the sliding rod (44). One end of the second connecting rod (54) passes through the first inner seat (12) and is hinged to the end of the sliding rod (44). The mounting base (41) is provided with a through groove (411) for the sliding rod (44) to slide.

8. The concealed hinge with door-stopping function as described in claim 4, characterized in that: The door frame housing assembly (2) includes a second outer shell (21) and a second inner seat (22) installed inside the second outer shell (21), wherein the second connecting plate (32) and the fourth connecting plate (34) are hinged to the second inner seat (22).

9. The concealed hinge with door-stopping function as described in claim 5, characterized in that: The door frame housing assembly (2) includes a fixing plate (23), on which a first waist-shaped groove (231) for adjusting the lateral position and a second waist-shaped groove (232) for adjusting the vertical position are provided, and the first fixing seat (201) is integrally disposed on the fixing plate (23).

10. The concealed hinge with door-stopping function as described in claim 6, characterized in that: The door frame housing assembly (2) includes an outer frame plate (24) and an inner frame plate (25) installed inside the outer frame plate (24) and whose height is adjustable. The second fixing seat (202) is fixed on the inner frame plate (25). The outer frame plate (24) is provided with a third waist-shaped groove (251) for adjusting the height of the inner frame plate (25).

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