Hidden hinge

Abstract

The utility model discloses a hidden type hinge which comprises a first connecting piece, a second connecting piece, a third connecting piece, a fourth connecting piece and a fifth connecting piece. The first connecting piece is provided with a concave containing cavity, and the containing cavity is sequentially provided with a first hinge position and a second hinge position from inside to outside. The second connecting piece is provided with a convex connecting plate, and a third hinge position and a fourth hinge position are sequentially arranged on the connecting plate from near to far away from the second connecting piece; one end of the first hinge arm is hinged to the second hinge position, and the other end of the first hinge arm is hinged to the third hinge position; one end of the second hinge arm is hinged to the first hinge position, and the other end of the second hinge arm is hinged to the fourth hinge position; wherein a first included angle is formed between the two ends of the first hinge arm, a second included angle is formed between the two ends of the second hinge arm, and the first included angle and the second included angle are obtuse angles. According to the utility model, the door leaf can be more smoothly attached to the door frame when the door leaf is opened, an overlarge gap is not needed to avoid collision, and higher bearing capacity and stability can be kept.

Description

Technical Field

[0001] The utility model relates to the technical field, in particular to a hidden hinge. Background Art

[0002] In the prior art, the invisible hinge of a door is an important component connecting the door leaf and the door frame. Its structural design and performance have an important impact on the opening and closing of the door and the overall structural stability. At present, the invisible hinges widely used in the market mostly adopt a single-axis rotating structure. Although this structure achieves the concealed effect of the hinge to a certain extent, it also has some problems that cannot be ignored.

[0003] Firstly, due to the single-axis rotation operation mode, invisible hinges need to leave a large gap when opening to ensure that the door leaf can rotate smoothly without colliding with the door frame. Although this design ensures the safe opening of the door, it sacrifices the sealing of the door gap, resulting in a decrease in sound insulation and heat preservation performance.

[0004] Secondly, when the invisible hinge with a single-axis rotating structure is subjected to force, its load-bearing part is mainly concentrated on the shaft. Therefore, in order to ensure the load-bearing capacity and stability of the hinge, the width of the hinge is often large. This makes the distance between the hinge and the edge of the door frame or door leaf smaller when the hinge is embedded in the door frame or door leaf. When slotting and installing the door leaf or door frame, it is easy to cause large-scale damage to the side of the aluminum alloy frame and the wooden panel, which not only affects the aesthetics of the door leaf, but more importantly, reduces the structural stability of the door leaf and increases the risk of problems during use.

[0005] In summary, the structural design of the existing invisible hinges for doors has deficiencies in terms of safety, sealing, structural stability, etc. There is an urgent need for a hidden hinge to solve these problems and improve the performance and overall quality of the door. Utility Model Content

[0006] In order to overcome at least one defect of the above-mentioned prior art, the utility model provides a hidden hinge, which can solve the problem of too large a door gap, and the double-axis rotation provides more rotational freedom, so that the door leaf can fit the door frame more smoothly when opening, without requiring too large a gap to avoid collision.

[0007] The technical solution adopted by the utility model to solve the problem is:

[0008] A hidden hinge comprises: a first connecting member, the first connecting member having an inwardly concave accommodating cavity, the accommodating cavity being provided with a first hinge position and a second hinge position in sequence from the inside to the outside; a second connecting member, the second connecting member having an outwardly convex connecting plate, the connecting plate being provided with a third hinge position and a fourth hinge position in sequence from near to far from the second connecting member; a first hinged arm, one end of the first hinged arm being hinged to the second hinge position, and the other end of the first hinged arm being hinged to the third hinge position; a second hinged arm, one end of the second hinged arm being hinged to the first hinge position, and the other end of the second hinged arm being hinged to the fourth hinge position; wherein a first angle is formed between the two ends of the first hinged arm, a second angle is formed between the two ends of the second hinged arm, and the first angle and the second angle are obtuse angles.

[0009] By adopting the above solution, the door leaf can fit the door frame more smoothly when opening, without requiring too large a gap to avoid collision. In this way, the sealing of the door is significantly improved, and the sound insulation and heat preservation performance are also enhanced; by adjusting the angle between the first hinge arm and the second hinge arm, the load distribution of the hinge can be optimized, and the obtuse angle can maintain a high load-bearing capacity and stability, which helps to maintain the structural integrity of the door leaf; and the hinge can be hidden when closed, which not only improves the overall aesthetics, but also effectively protects the hinge from dust and moisture erosion, extending the service life.

[0010] Furthermore, a first avoidance cavity is provided on the back side of the first hinged arm at one side where the angle is formed, and when the first connecting member and the second connecting member are closed, the first avoidance cavity abuts against one end of the second hinged arm.

[0011] By adopting the above solution, not only the movement trajectory of the second articulated arm in the hinge is limited, the stability is improved, but also the service life and reliability of the hinge are improved.

[0012] Furthermore, a second avoidance cavity is provided on one side of the second hinged arm forming an angle, and when the first connecting member and the second connecting member are opened, the second avoidance cavity abuts against one end of the first hinged arm.

[0013] By adopting the above solution, not only the movement trajectory of the first articulated arm in the hinge is limited, the stability is improved, but also the ability of the hinge to withstand external forces is improved.

[0014] Furthermore, a first opening is provided on a side of the accommodating cavity facing the second connecting member, and the first opening is used to allow the connecting plate to extend into the accommodating cavity.

[0015] By adopting the above solution, the existence of the first opening enables the connecting plate to smoothly extend into the accommodating cavity, thereby realizing a hidden tight connection between the first connecting member and the second connecting member, and ensuring the stability and reliability of the hinge after installation.

[0016] Furthermore, a second opening communicating with the first opening is provided on one side of the accommodating cavity adjacent to the first opening, and the second opening is used to avoid the first articulated arm and / or the second articulated arm.

[0017] By adopting the above solution, without destroying the overall structure of the hinge, necessary movement space is provided for the first articulated arm and the second articulated arm. During the opening or closing process of the hinge, the first articulated arm and the second articulated arm will perform corresponding rotational movement, and the second opening can avoid interference problems when the first articulated arm and the second articulated arm are opened and closed.

[0018] Furthermore, a first hinge axis is provided at one end of the first hinge arm, and a second hinge hole is provided at the second hinge position corresponding to the first hinge axis; a second hinge axis is provided at the other end of the first hinge arm, and a third hinge hole is provided at the third hinge position corresponding to the second hinge axis.

[0019] By adopting the above solution, the cooperation between the first hinge axis and the second hinge hole enables one end of the first hinge arm to rotate around the second hinge position. Similarly, the cooperation between the second hinge axis and the third hinge hole also enables the other end of the first hinge arm to rotate around the third hinge position. This dual-axis rotation design enables the hinge to maintain a smooth movement trajectory when opening and closing, reduces friction and noise, and increases the service life of the hinge.

[0020] Furthermore, a third hinge axis is arranged at one end of the second hinge arm, and a first hinge hole is arranged at the first hinge position corresponding to the third hinge axis; a fourth hinge axis is arranged at the other end of the second hinge arm, and a fourth hinge hole is arranged at the fourth hinge position corresponding to the fourth hinge axis.

[0021] By adopting the above solution, the third hinge axis matches the first hinge hole, ensuring that one end of the second hinge arm can rotate smoothly around the first hinge position. Similarly, the precise matching of the fourth hinge axis and the fourth hinge hole enables the other end of the second hinge arm to move flexibly around the fourth hinge position. This design not only optimizes the movement trajectory of the hinge, but also improves its overall structural stability.

[0022] Furthermore, the protruding length of the connecting plate is not greater than the recessed depth of the accommodating cavity.

[0023] By adopting the above solution, when the protruding length of the connecting plate is just equal to or less than the concave depth of the accommodating cavity, the connecting plate can smoothly extend into the accommodating cavity and form a stable contact with the bottom or side of the accommodating cavity. This contact not only provides sufficient supporting force to ensure the stability and reliability of the hinge, but also makes the hinge more neat and beautiful in appearance.

[0024] Furthermore, the connecting plate is bent along the third hinge position to form a third angle, and the third angle is an obtuse angle.

[0025] By adopting the above solution, the third angle is designed as an obtuse angle, which provides a larger bending space for the connecting plate, so that the connecting plate can better adapt to and cooperate with the installation requirements of the first connecting member and the second connecting member after bending.

[0026] Furthermore, the connecting plate is provided with reinforcing ribs.

[0027] By adopting the above solution and by reasonably arranging the reinforcing ribs, the connecting plate can more effectively disperse stress when subjected to external force, reduce stress concentration, and thus improve its overall strength.

[0028] In summary, the hidden hinge provided by the utility model has the following technical effects:

[0029] 1. By adopting a dual-axis rotation design, the hidden hinge does not need to reserve a large gap when opening the door leaf, so that the door leaf can fit the door frame more closely. This design significantly improves the sealing of the door, thereby enhancing the sound insulation and heat preservation performance of the door, providing users with a quieter and more comfortable indoor environment;

[0030] 2. The obtuse angle design of the first hinge arm and the second hinge arm optimizes the load distribution. The obtuse angle design allows the hinge to disperse stress and reduce stress concentration when bearing the weight of the door leaf, thereby improving the hinge's load-bearing capacity and stability. At the same time, this design also helps maintain the structural integrity of the door leaf and reduce deformation or damage caused by uneven force;

[0031] 3. The hidden hinge can be completely hidden inside the door leaf when closed, making the door look neater and more beautiful. This design not only improves the overall aesthetics, but also effectively protects the hinge from dust and moisture. At the same time, due to the stable structure and durable materials of the hinge, it also has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of a partial explosion structure of an embodiment of the utility model;

[0033] Figure 2 This is a schematic diagram of the structure of the second connecting member in an embodiment of the utility model;

[0034] Figure 3 This is a schematic diagram of the horizontal cross-section structure of the hinge in the closed state of an embodiment of the utility model;

[0035] Figure 4 It is a schematic diagram of the horizontal cross-section structure of the hinge part of the embodiment of the utility model in the open state;

[0036] Figure 5 The horizontal cross-sectional structure diagram of the hinge of the embodiment of the utility model in the fully opened state. The meanings of the reference numerals are as follows: 1. first connecting member; 11. accommodating cavity; 111. first hinge position; 112. second hinge position; 113. first opening; 114. second opening; 2. second connecting member; 21. assembly plate; 22. connecting plate; 221. third hinge position; 222. fourth hinge position; 3. first hinge arm; 31. first avoidance cavity; 32. first hinge axis; 33. second hinge axis; 4. second hinge arm; 41. second avoidance cavity; 42. third hinge axis; 43. fourth hinge axis; 5. reinforcing rib. DETAILED DESCRIPTION

[0037] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] In order to facilitate the understanding of the embodiments of the present utility model, the following will be further explained by taking specific embodiments as examples in conjunction with the drawings, and each embodiment does not constitute a limitation on the embodiments of the present utility model.

[0039] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0041] Embodiment 1 of the present utility model is referred to Figure 1-Figure 5 As shown, a hidden hinge is disclosed, including a first connecting member 1, a second connecting member 2, a first hinge arm 3 and a second hinge arm 4. Specifically, the first connecting member 1 is a rectangular box body, with screw holes for screw assembly at both ends, and a concave accommodating cavity 11 formed between the two ends. The accommodating cavity 11 is sequentially provided with a first hinge position 111 and a second hinge position 112 from the inside to the outside; the second connecting member 2 includes an integrally connected assembly plate 21 and a connecting plate 22, the connecting plate 22 extends outwardly to one side of the assembly plate 21, and the distance between the first hinge position 111 and the second hinge position 112 on the connecting plate 22 is 4. The assembly plate 21 of the second connecting member 2 is provided with a third hinge position 221 and a fourth hinge position 222 in sequence from near to far, one end of the first hinge arm 3 is hinged to the second hinge position 112, the other end of the first hinge arm 3 is hinged to the third hinge position 221, one end of the second hinge arm 4 is hinged to the first hinge position 111, and the other end of the second hinge arm 4 is hinged to the fourth hinge position 222, thereby forming a double-axis hinge joint, so that the door leaf can fit the door frame more smoothly when opening, without requiring too large a gap to avoid collision. In this way, the sealing of the door is significantly improved, and the sound insulation and heat preservation performance are also enhanced; wherein, a first angle is formed between the two ends of the first hinged arm 3, and a second angle is formed between the two ends of the second hinged arm 4, and the first angle and the second angle are obtuse angles. By adjusting the angle between the first hinged arm 3 and the second hinged arm 4, the load-bearing distribution of the hinge can be optimized, and the obtuse angle can maintain a high load-bearing capacity and stability, which helps to maintain the structural integrity of the door leaf; and the hinge can be hidden when closed, which not only improves the overall aesthetics, but also effectively protects the hinge from dust and moisture erosion, thereby extending the service life.

[0042] During operation, when the first connecting member 1 and the second connecting member 2 are closed, the first articulated arm 3, the second articulated arm 4 and the connecting plate 22 are all accommodated in the accommodating cavity 11; when the first connecting member 1 and the second connecting member 2 are opened, the connecting plate 22 detaches from the accommodating cavity 11 and drives the first articulated arm 3 and the second articulated arm 4 to partially extend out of the accommodating cavity 11, thereby achieving an open state.

[0043] In some embodiments, in order to further limit the maximum limit of the closing and opening of the first connecting member 1 and the second connecting member 2 and improve the stability and safety of the hinge, a first avoidance cavity 31 is provided on the back side of the side where the first hinge arm 3 forms an angle, and a second avoidance cavity 41 is provided on the side where the second hinge arm 4 forms an angle. When the first connecting member 1 and the second connecting member 2 are closed, the first avoidance cavity 31 abuts against one end of the second hinge arm 4, which not only limits the movement trajectory of the second hinge arm 4 in the hinge, improves the stability, but also improves the service life and reliability of the hinge. When the first connecting member 1 and the second connecting member 2 are opened, the second avoidance cavity 41 abuts against one end of the first hinge arm 3, which not only limits the movement trajectory of the first hinge arm 3 in the hinge, improves the stability, but also improves the ability of the hinge to withstand external forces.

[0044] A first opening 113 is provided on the side of the accommodating cavity 11 facing the second connecting member 2. The first opening 113 is used to allow the connecting plate 22 to extend into the accommodating cavity 11. The existence of the first opening 113 enables the connecting plate 22 to smoothly extend into the accommodating cavity 11, thereby realizing a hidden and tight connection between the first connecting member 1 and the second connecting member 2, and ensuring the stability and reliability of the hinge after installation. In the present embodiment 1, in order to avoid the first articulated arm 3 or the second articulated arm 4 from colliding with the accommodating cavity 11 during the opening process of the first connecting member 1 and the second connecting member 2, a second opening 114 connected to the first opening 113 is provided on the side of the accommodating cavity 11 adjacent to the first opening 113. The second opening 114 is used to avoid the first articulated arm 3 and / or the second articulated arm 4. Without destroying the overall structure of the hinge, necessary movement space is provided for the first articulated arm 3 and the second articulated arm 4. During the opening or closing process of the hinge, the first articulated arm 3 and the second articulated arm 4 will perform corresponding rotational movement. The second opening 114 can avoid interference between the first articulated arm 3 and the second articulated arm 4 during opening and closing.

[0045] In the present embodiment 1, a first hinge shaft 32 is provided at one end of the first hinge arm 3, and a second hinge hole is provided at the second hinge position 112 corresponding to the first hinge shaft 32; a second hinge shaft 33 is provided at the other end of the first hinge arm 3, and a third hinge hole is provided at the third hinge position 221 corresponding to the second hinge shaft 33. A third hinge shaft 42 is provided at one end of the second hinge arm 4, and a first hinge hole is provided at the first hinge position 111 corresponding to the third hinge shaft 42; a fourth hinge shaft 43 is provided at the other end of the second hinge arm 4, and a fourth hinge hole is provided at the fourth hinge position 222 corresponding to the fourth hinge shaft 43. Thus, the hinge effect of the first hinge arm 3, the second hinge arm 4, the first connecting member 1 and the second connecting member 2 is achieved.

[0046] It should be noted that, in other embodiments, the first hinge position 111, the second hinge position 112, the third hinge position 221 and the fourth hinge position 222 can be hinge axes or hinge holes, or a combination of the two. This embodiment does not make specific limitations, as long as the hinge effect can be achieved.

[0047] In this embodiment 1, the protruding length of the connecting plate 22 is not greater than the concave depth of the accommodating cavity 11. This design allows the connecting plate 22 to smoothly extend into the accommodating cavity 11 and form a stable contact with the bottom or side of the accommodating cavity 11. It not only provides sufficient supporting force to ensure the stability and reliability of the hinge, but also makes the hinge more neat and beautiful in appearance.

[0048] Preferably, the connecting plate 22 is bent along the third hinge position 221 to form a third angle, and the third angle is an obtuse angle. The design of the third angle as an obtuse angle provides a larger bending space for the connecting plate 22, so that the connecting plate 22 can better adapt to and cooperate with the installation requirements of the first connecting member 1 and the second connecting member 2 after bending.

[0049] Optionally, the connecting plate 22 is provided with reinforcing ribs 5. In the present embodiment 1, specifically, the reinforcing ribs 5 are arranged between the third hinge position 221 of the connecting plate 22 and the assembly plate 21, and the thickness of the reinforcing ribs 5 is thicker as they are closer to the assembly plate 21. By reasonably arranging the reinforcing ribs 5, the connecting plate 22 can more effectively disperse stress when subjected to external force, reduce stress concentration, and thus improve its overall strength.

[0050] In summary, the hidden hinge provided by the utility model has the following technical effects:

[0051] 1. By adopting a dual-axis rotation design, the hidden hinge does not need to reserve a large gap when opening the door leaf, so that the door leaf can fit the door frame more closely. This design significantly improves the sealing of the door, thereby enhancing the sound insulation and heat preservation performance of the door, providing users with a quieter and more comfortable indoor environment;

[0052] 2. The obtuse angle design of the first hinge arm 3 and the second hinge arm 4 optimizes the load distribution. The obtuse angle design allows the hinge to disperse stress and reduce stress concentration when bearing the weight of the door leaf, thereby improving the hinge's load-bearing capacity and stability. At the same time, this design also helps maintain the structural integrity of the door leaf and reduce deformation or damage caused by uneven force;

[0053] 3. The hidden hinge can be completely hidden inside the door leaf when closed, making the door look neater and more beautiful. This design not only improves the overall aesthetics, but also effectively protects the hinge from dust and moisture. At the same time, due to the stable structure and durable materials of the hinge, it also has a long service life.

[0054] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A hidden hinge, characterized in that: include: A first connecting member (1), the first connecting member (1) having an inwardly concave accommodating cavity (11), the accommodating cavity (11) being provided with a first hinge position (111) and a second hinge position (112) in sequence from the inside to the outside; A second connecting member (2), the second connecting member (2) having an outwardly protruding connecting plate (22), the connecting plate (22) being provided with a third hinge position (221) and a fourth hinge position (222) in sequence from near to far from the second connecting member (2); A first articulated arm (3), one end of the first articulated arm (3) being articulated to the second articulated position (112), and the other end of the first articulated arm (3) being articulated to the third articulated position (221); a second articulated arm (4), one end of the second articulated arm (4) being articulated to the first articulated position (111), and the other end of the second articulated arm (4) being articulated to the fourth articulated position (222); Wherein, a first angle is formed between the two ends of the first articulated arm (3), a second angle is formed between the two ends of the second articulated arm (4), and the first angle and the second angle are obtuse angles.

2. A hidden hinge according to claim 1, characterized in that: A first avoidance cavity (31) is provided on the back side of the first hinged arm (3) on the side where the angle is formed, and when the first connecting member (1) and the second connecting member (2) are closed, the first avoidance cavity (31) abuts against one end of the second hinged arm (4).

3. A hidden hinge according to claim 2, characterized in that: A second avoidance cavity (41) is provided on one side of the second hinged arm (4) forming an angle, and when the first connecting member (1) and the second connecting member (2) are opened, the second avoidance cavity (41) abuts against one end of the first hinged arm (3).

4. A concealed hinge according to claim 1, characterized in that: A first opening (113) is provided on a side of the accommodating cavity (11) facing the second connecting member (2), and the first opening (113) is used to allow the connecting plate (22) to extend into the accommodating cavity (11).

5. A hidden hinge according to claim 4, characterized in that: A second opening (114) communicating with the first opening (113) is provided on one side of the accommodating cavity (11) adjacent to the first opening (113); the second opening (114) is used to avoid the first articulated arm (3) and / or the second articulated arm (4).

6. A hidden hinge according to claim 1, characterized in that: A first hinge shaft (32) is arranged at one end of the first hinge arm (3), and a second hinge hole is arranged at the second hinge position (112) corresponding to the first hinge shaft (32); a second hinge shaft (33) is arranged at the other end of the first hinge arm (3), and a third hinge hole is arranged at the third hinge position (221) corresponding to the second hinge shaft (33).

7. The hidden hinge according to claim 1, characterized in that: A third hinge axis (42) is arranged at one end of the second hinged arm (4), and a first hinge hole is arranged at the first hinge position (111) corresponding to the third hinge axis (42); a fourth hinge axis (43) is arranged at the other end of the second hinged arm (4), and a fourth hinge hole is arranged at the fourth hinge position (222) corresponding to the fourth hinge axis (43).

8. A hidden hinge according to any one of claims 1 to 7, characterized in that: The protruding length of the connecting plate (22) is no greater than the concave depth of the accommodating cavity (11).

9. A hidden hinge according to any one of claims 1 to 7, characterized in that: The connecting plate (22) is bent along the third hinge position (221) to form a third angle, and the third angle is an obtuse angle.

10. A hidden hinge according to claim 9, characterized in that: The connecting plate (22) is provided with reinforcing ribs (5).

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