Hidden door hinge

Abstract

The utility model provides a hidden type door hinge which comprises a first hinge shaft, a second hinge shaft and a hinge fixing seat, one end of the first hinge shaft and one end of the second hinge shaft are symmetrically hinged to the inner side of the hinge fixing seat, connecting pieces are symmetrically hinged to the other end of the first hinge shaft and the other end of the second hinge shaft, and the connecting pieces and the hinge fixing seat are used for connecting a door body and a door frame respectively. A notch is formed in one end of the first hinge shaft, a boss is arranged on the surface of the second hinge shaft, a stop column is arranged at the position, located at the notch, of the first hinge shaft, and an arc-shaped concave face is arranged on the boss. According to the hidden door hinge, the first hinged shaft and the second hinged shaft can be mutually overturned to a smaller angle through the notch in the first hinged shaft, collision is avoided when a door body and a door frame are closed, the overturning angle of the first hinged shaft and the second hinged shaft is limited through cooperation of the stop column and the concave face, overturning of the first hinged shaft and the second hinged shaft at an overlarge angle is avoided, and the hidden door hinge is safe and reliable. Therefore, the service life of the whole hinge is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of door hinges, in particular to a concealed door hinge. Background Art

[0002] The door hinge is provided with a receiving body on the door leaf side for being arranged in a door leaf configured with a door rabbet, and has a base body for being arranged in the door leaf base body of the door leaf and a protruding part for being arranged in the door rabbet. The patent with the application number 201611059188.2 discloses a concealed door hinge, which has a receiving body (3) on the door leaf side for being arranged in a door leaf (2) configured with a door rabbet (2b), and a hinge bracket (7) pivotally connected to the first hinge component. The receiving body has a base body (3a) for being arranged in the door leaf base body (2a) of the door leaf (2) and a protruding part (3b) for being arranged in the door rabbet (2b). The hinge bracket is surrounded by the protruding parts (3b) on both sides and is connected to a receiving body (8) on the frame side for being fixed on the door frame (1). According to the invention, a sealing forming part (9) with two abutting arms (9a) and a connecting section (9b) connecting the abutting arms (9a) is provided. The abutting arms respectively abut on the inner side (10) of the protruding part (3b) on both sides of the hinge bracket (7). Its internal movable hinge is not provided with an avoidance structure, resulting in that the maximum closing angle cannot be achieved between the hinges after the two side door bodies are closed, and they are easily worn after colliding with each other. Summary of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] The problem to be solved by the utility model is to provide a concealed door hinge to overcome the defect that the movable hinge of the existing door hinge is easily collided and worn due to the lack of an avoidance structure inside.

[0005] (2) Technical Solutions

[0006] To solve the above technical problems, the present utility model provides a concealed door hinge, which includes a first hinge shaft, a second hinge shaft and a hinge fixing seat. One end of the first hinge shaft and the second hinge shaft are symmetrically hinged inside the hinge fixing seat. The other end of the first hinge shaft and the second hinge shaft are symmetrically hinged with connecting pieces, and the connecting pieces and the hinge fixing seat are respectively used for connecting the door body and the door frame. One end of the first hinge shaft is provided with a notch, and the surface of the second hinge shaft is provided with a boss. When the door body is closed, the boss is placed in the notch. The first hinge shaft is provided with a stop post at the notch, and the boss is provided with an arc-shaped concave surface. When the door body is closed, the stop post is placed in the concave surface. The notch plays a role of avoidance, making the closing angle of the first hinge shaft and the second hinge shaft smaller, so that the first hinge shaft and the second hinge shaft will not collide when the door body is closed. The cooperation between the stop post and the concave surface blocks the first hinge shaft and the second hinge shaft, so that they will not flip over too large an angle relative to each other.

[0007] In some embodiments, the first hinge shaft is provided with a first connecting portion and a second connecting portion, and the second hinge shaft is provided with a third connecting portion and a fourth connecting portion. The two ends of the first connecting portion and the third connecting portion are respectively hinged inside the hinge fixing seat through a connecting shaft. The two ends of the second connecting portion and the fourth connecting portion are respectively hinged on the connecting surface of the connecting piece through a connecting shaft. The first hinge shaft is provided with an inwardly concave arc-shaped surface, and the other side of the second hinge shaft is provided with a groove. When the door body is opened, the third connecting portion is placed in the arc-shaped surface, and the outer door frame is placed in the groove.

[0008] In some embodiments, the notch and the stop post are located at the first connecting portion. The second hinge shaft is symmetrically provided with arc-shaped grooves on both sides of the concave surface. When the door body is closed, the two ends of the first connecting portion abut against the grooves, and the grooves also prevent the first hinge shaft and the second hinge shaft from colliding.

[0009] In some embodiments, a cover plate is installed between the connecting surfaces. The inner side surface of the cover plate is symmetrically provided with a first connecting seat and a second connecting seat. The connecting surfaces are both provided with a first screw and a second screw. The first screws are respectively fixed on the first connecting seats, and the second screws are respectively fixed on the second connecting seats.

[0010] In some embodiments, one side of the hinge fixing seat is connected to an outer door body. The middle part of the hinge fixing seat protrudes outwards and is placed inside the door body. The connecting piece is bent, and one end is an installation surface, and an installation plate is fixed on the installation surface, and the installation plate is connected to the outer door frame.

[0011] In some embodiments, a baffle is fixed to one side of the hinge fixing seat. The baffle is embedded and assembled on the surface of the door body. Protrusions are fixed on the mounting surface, and the protrusions are placed on the outer surface of the door frame. A concave avoidance groove is provided on the baffle. When the door body is closed, the protrusions are respectively placed in the avoidance grooves.

[0012] In some embodiments, when the door body is in the open state, the connecting surface and the cover plate expose the door body and the door frame. An opening is provided between the baffles located in the avoidance grooves, and the connecting surface and the cover plate can pass through the opening.

[0013] (III) Beneficial effects

[0014] A concealed door hinge provided by the present utility model, wherein the first hinge shaft and the second hinge shaft are hinged to each other through a hinge fixing seat and a connecting piece, and are respectively connected to an outer door body and a door frame at the same time. The notch on the first hinge shaft enables the first hinge shaft and the second hinge shaft to be flipped to a smaller angle relative to each other, avoiding collision when the door body and the door frame are closed. The cooperation between the stop post and the concave surface limits the flipping angle of the first hinge shaft and the second hinge shaft, preventing them from flipping at too large an angle and affecting the use of the door body, thereby prolonging the overall service life of the hinge. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 is a perspective view of a concealed door hinge of the present utility model;

[0017] Figure 2 is an internal structure perspective view of a concealed door hinge of the present utility model;

[0018] Figure 3 is a perspective view of a hinge fixing seat and a connecting piece of a concealed door hinge of the present utility model;

[0019] Figure 4 is a perspective view of a cover plate of a concealed door hinge of the present utility model;

[0020] Figure 5 is a cross-sectional view of the internal structure of a concealed door hinge of the present utility model;

[0021] Figure 6 is a perspective view of the first hinge shaft, the second hinge shaft and the connecting piece of a concealed door hinge of the present utility model in the open state;

[0022] Figure 7Stereogram of the second hinge shaft of a concealed door hinge of the present utility model;

[0023] Figure 8 Stereogram of the first hinge shaft of a concealed door hinge of the present utility model;

[0024] Figure 9 Stereogram of the closed state of the first hinge shaft, the second hinge shaft and the connecting piece of a concealed door hinge of the present utility model;

[0025] Figure 10 Stereogram of the closed state of the first hinge shaft and the second hinge shaft of a concealed door hinge of the present utility model;

[0026] Figure 11 Stereogram of the second embodiment of a concealed door hinge of the present utility model.

[0027] The corresponding component names of the respective reference numerals in the figure are: 1, the first hinge shaft; 101, the notch; 102, the stop post; 103, the first connecting portion; 104, the second connecting portion; 105, the arc surface; 2, the second hinge shaft; 201, the boss; 202, the concave surface; 203, the third connecting portion; 204, the fourth connecting portion; 205, the groove; 206, the groove; 3, the hinge fixing seat; 4, the connecting piece; 401, the connecting surface; 402, the mounting surface; 5, the cover plate; 501, the first connecting seat; 502, the second connecting seat; 6, the first screw; 7, the second screw; 8, the door body; 9, the mounting plate; 10, the door frame; 11, the baffle; 12, the convex block; 13, the avoidance groove; 14, the opening. Detailed implementation manners

[0028] The following describes the embodiments of the present application in detail with reference to the accompanying drawings.

[0029] The following illustrates the implementation manners of the present application through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0030] Note that the following description pertains to various aspects of embodiments within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art should 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 a device and / or practice a method. Additionally, this device can be implemented and this method can be practiced using other structures and / or functionality in addition to one or more of the aspects set forth herein.

[0031] It should also be noted that the diagrams provided in the following embodiments merely illustrate the basic concept of this application schematically. The diagrams only show the components related to this application and are not drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0032] Furthermore, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that these examples can be practiced without these specific details.

[0033] Embodiment 1:

[0034] Referring to Figures 1 to 10 , the present utility model provides a concealed door hinge, which includes a first hinge shaft 1, a second hinge shaft 2, and a hinge fixing seat 3. One end of the first hinge shaft 1 and the second hinge shaft 2 are symmetrically hinged inside the hinge fixing seat 3. The other ends of the first hinge shaft 1 and the second hinge shaft 2 are symmetrically hinged with a connecting piece 4, that is, a connecting piece 4 is connected to each side of the first hinge shaft 1 and the second hinge shaft 2, and one end of the first hinge shaft 1 and the second hinge shaft 2 are both hinged on the connecting piece 4. The connecting piece 4 and the hinge fixing seat 3 enable the first hinge shaft 1 and the second hinge shaft 2 to be flipped relative to each other at a certain angle, thereby realizing the opening and closing of the door body. The connecting piece 4 and the hinge fixing seat 3 are respectively used to connect the door body and the door frame. A notch 101 is provided at one end of the first hinge shaft 1, and a boss 201 is provided on the surface of the second hinge shaft 2. When the door body is closed, the boss 201 is placed inside the notch 101. The notch 101 enables the closing angle of the first hinge shaft 1 and the second hinge shaft 2 to be smaller, so that the first hinge shaft 1 and the second hinge shaft 2 will not collide and wear when the door body is closed. A stop post 102 is provided at the notch 101 of the first hinge shaft 1, and an arc-shaped concave surface 202 is provided on the boss 201. When the door body is closed, the stop post 102 abuts against the concave surface 202. The cooperation between the stop post 102 and the concave surface 202 plays a role in blocking and limiting, so that the first hinge shaft 1 and the second hinge shaft 2 will not be flipped excessively.

[0035] In some embodiments, such asFigures 4 to 8 As shown in the figure, a first connecting portion 103 and a second connecting portion 104 are provided on the first hinge shaft 1, and a third connecting portion 203 and a fourth connecting portion 204 are provided on the second hinge shaft 2. Both ends of the first connecting portion 103 and the third connecting portion 203 are respectively hinged to the inner side of the hinge fixing seat 3 through connecting shafts, and both ends of the second connecting portion 104 and the fourth connecting portion 204 are respectively hinged to the connecting surface 401 of the connecting piece 4 through connecting shafts. Therefore, when the first hinge shaft 1 and the second hinge shaft 2 are relatively flipped, the connecting piece 4 and the hinge fixing seat 3 drive the door body and the door frame to be relatively closed; specifically, an inner concave arc surface 105 is provided on the first hinge shaft 1, and a groove 206 is provided on the other surface of the second hinge shaft 2. When the door body is opened, the third connecting portion 203 is placed in the arc surface 105, and the outer door frame is placed in the groove 206. The arc surface 105 enables the first hinge shaft 1 and the second hinge shaft 2 to have a larger opening angle in the opened state of the door body, avoiding mutual collision. The groove 206 can enable the second hinge shaft 2 to avoid the outer door frame, making the opening angle of the door body larger; a notch 101 and a stop post 102 are located at the first connecting portion 103, and arc-shaped grooves 205 are symmetrically provided on both sides of the second hinge shaft 2 located in the concave surface 202. When the door body is closed, the first connecting portion 103 is placed in the groove 205, playing a role in limiting and protecting; a cover plate 5 is installed between the connecting surfaces 401, and a first connecting seat 501 and a second connecting seat 502 are symmetrically provided on the inner side surface of the cover plate 5. First screws 6 and second screws 7 are provided on the connecting surfaces 401 respectively. The first screws 6 are respectively fixed on the first connecting seat 501, and the second screws 7 are respectively fixed on the second connecting seat 502.

[0036] In some embodiments, as Figures 1 to 3 shown, one side of the hinge fixing seat 3 is connected to the outer door body 8, the middle part of the hinge fixing seat 3 protrudes outward and is placed inside the door body 8, the connecting piece 4 is bent and one end is an installation surface 402, and a mounting plate 9 is fixed on the installation surface 402. The mounting plate 9 is connected to the outer door frame 10. In the opened state of the door body, the connecting surface 401 and the cover plate 5 are exposed from the door body 8 and the door frame 10. The cover plate 5 is used to protect the first hinge shaft 1 and the second hinge shaft 2, and at the same time prevent dirt from entering and affecting their flipping; a baffle 11 is fixed on one side of the hinge fixing seat 3, the baffle 11 is embedded and assembled on the surface of the door body 8, convex blocks 12 are fixed on the installation surface 402, and the convex blocks 12 are placed on the outer surface of the door frame 10. An inner concave avoidance groove 13 is provided on the baffle 11. When the door body is closed, the convex blocks 12 are respectively placed in the avoidance grooves 13, keeping the inside of the door body 8 and the door frame 10 closed. An opening 14 is provided between the baffle 11 located in the avoidance grooves 13, and the connecting surface 401 and the cover plate 5 can pass through the opening 14.

[0037] Embodiment 2:

[0038] Refer to Figure 11, the difference between this embodiment and the first embodiment is that according to the actual installation requirements of the door hinge, the hinge fixing seats 3 and the connecting pieces 4 at both ends can be replaced with accessories of different models to be applicable to the installation of different models of door bodies.

[0039] A concealed door hinge provided by the present utility model, wherein the first hinge shaft and the second hinge shaft are hinged to each other through the hinge fixing seat and the connecting piece and are respectively connected to the outer door body and the door frame at the same time. The notch on the first hinge shaft enables the first hinge shaft and the second hinge shaft to be flipped to a smaller angle relative to each other, avoiding collision when the door body and the door frame are closed. The cooperation between the stop post and the concave surface limits the flipping angle of the first hinge shaft and the second hinge shaft, preventing them from flipping at too large an angle and affecting the use of the door body, thereby prolonging the overall service life of the hinge.

[0040] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A concealed door hinge, comprising a first hinge shaft (1), a second hinge shaft (2) and a hinge fixing seat (3), characterized in that: One end of the first hinge shaft (1) and the second hinge shaft (2) are symmetrically hinged inside the hinge fixed seat (3). The other ends of the first hinge shaft (1) and the second hinge shaft (2) are symmetrically hinged with a connecting piece (4). The connecting piece (4) and the hinge fixed seat (3) are respectively used to connect the door body and the door frame. One end of the first hinge shaft (1) is provided with a notch (101). A boss (201) is provided on the surface of the second hinge shaft (2). When the door body is closed, the boss (201) is placed in the notch (101). A stop post (102) is provided at the notch (101) of the first hinge shaft (1).

2. The concealed door hinge according to claim 1, characterized in that: A first connecting portion (103) and a second connecting portion (104) are provided on the first hinge shaft (1). A third connecting portion (203) and a fourth connecting portion (204) are provided on the second hinge shaft (2). Both ends of the first connecting portion (103) and the third connecting portion (203) are respectively hinged inside the hinge fixed seat (3) through a connecting shaft. Both ends of the second connecting portion (104) and the fourth connecting portion (204) are respectively hinged on the connecting surface (401) of the connecting piece (4) through a connecting shaft.

3. The concealed door hinge according to claim 2, wherein: An inward concave arc surface (105) is provided on the first hinge shaft (1). A groove (206) is provided on the other surface of the second hinge shaft (2). When the door body is opened, the third connecting portion (203) is placed in the arc surface (105), and the outer door frame is placed in the groove (206).

4. The concealed door hinge according to claim 2, wherein: An arc-shaped concave surface (202) is provided on the boss (201). When the door body is closed, the stop post (102) abuts against the concave surface (202). The notch (101) and the stop post (102) are located at the first connecting portion (103). Arc-shaped grooves (205) are symmetrically provided on both sides of the second hinge shaft (2) at the concave surface (202). When the door body is closed, the first connecting portion (103) is placed in the groove (205).

5. The concealed door hinge according to claim 2, wherein: A cover plate (5) is installed between the connecting surfaces (401). First connecting seats (501) and second connecting seats (502) are symmetrically provided on the inner side surface of the cover plate (5). First screws (6) and second screws (7) are provided on the connecting surfaces (401). The first screws (6) are respectively fixed on the first connecting seats (501), and the second screws (7) are respectively fixed on the second connecting seats (502).

6. The concealed door hinge according to claim 5, wherein: One side of the hinge fixed seat (3) is connected to the outer door body (8), and the middle part of the hinge fixed seat (3) protrudes outward and is placed inside the door body (8).

7. The concealed door hinge according to claim 6, characterized in that: The connecting piece (4) is bent and one end is an installation surface (402). An installation plate (9) is fixed on the installation surface (402), and the installation plate (9) is connected to the outer door frame (10).

8. The hidden door hinge according to claim 7, characterized in that: One side of the hinge fixing seat (3) is fixed with a baffle (11), the baffle (11) is embedded and assembled on the surface of the door body (8), bump blocks (12) are fixed on the mounting surface (402), the bump blocks (12) are placed on the outer surface of the door frame (10), the baffle (11) is provided with a concave avoidance groove (13), and when the door body is closed, the bump blocks (12) are respectively placed in the avoidance groove (13).

9. The concealed door hinge according to claim 8, characterized in that: When the door body is in the open state, the connecting surface (401) and the cover plate (5) expose the door body (8) and the door frame (10), an opening (14) is provided between the baffles (11) located in the avoidance groove (13), and the connecting surface (401) and the cover plate (5) can pass through the opening (14).

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