Concealed hinges

Abstract

The present application discloses a concealed hinge, comprising a first hinge mounted on a door panel and a second hinge mounted on a door frame, wherein an articulated arm is provided between the first hinge and the second hinge, and wherein the articulated arm comprises a first bridge arm and a second bridge arm; the first bridge arm comprises a first connecting block and a second connecting block, wherein one end of the first connecting block is hinged to the first hinge, the other end of the first connecting block is hinged to the second connecting block via a first hinge axis, and the second bridge arm is hinged to the second hinge; the second bridge arm comprises a third connecting block and a fourth connecting block, wherein one end of the third connecting block is hinged to the first hinge, the other end of the third connecting block is hinged to the fourth connecting block via a second hinge axis, and the fourth connecting block is hinged to the second hinge; wherein the first hinge axis and the second hinge axis are staggered. When applied to door panels of the same specifications and weight, compared with existing products, the concealed hinge of this solution can achieve a smaller size, easier installation, and better rotation effect.

Description

Technical Field

[0001] The present application relates to the field of door and window accessories, and in particular to a concealed hinge for doors and windows. Background Art

[0002] Door hinges are used to connect the door panel and door frame, allowing the door to open and close. A concealed hinge is a type of door hinge that consists of two hinges and a hinge arm that flexibly connects the two hinges. The two hinges of a concealed hinge are installed within holes in the door panel and / or door frame. When the door is closed, the hinge arm completely retracts into the hole, concealing the entire hinge. This improves aesthetics and prevents unauthorized access to any part of the hinge, enhancing safety.

[0003] However, the hinge arm of the existing hidden hinge is often an integral part with an arc, which has a poor movement trajectory and a short outward extension distance in the open state, affecting its applicability. The storage space required in the closed state is large, making the hidden hinge larger and inconvenient to install. Moreover, the hinge arm of the existing hidden hinge adopts a long hinge shaft to connect with the hinge, which has poor rotational rigidity, limiting the upper limit of the weight it can bear on the door panel. Summary of the Invention

[0004] In order to solve one of the technical problems existing in the prior art, the present application provides a hidden hinge, whose articulated arm includes multiple bridge arms, each bridge arm is a foldable structure composed of multiple connecting blocks, which optimizes the movement trajectory of the articulated arm and sets multiple staggered short articulated shafts to enhance the rotational rigidity of the product and increase the upper limit of its ability to bear the weight of the door panel.

[0005] According to an embodiment of a first aspect of the present invention, a concealed hinge comprises a first hinge mounted on a door panel and a second hinge mounted on a door frame, wherein at least one of the first hinge and the second hinge is provided with a receiving groove, and an articulated arm is provided between the first hinge and the second hinge, the articulated arm being movably connected to the first hinge and the second hinge respectively, and when the first hinge and the second hinge are closed, the articulated arm is received in the receiving groove;

[0006] The articulated arm includes a first bridge arm and a second bridge arm;

[0007] The first bridge arm is composed of a first connecting block and a second connecting block, one end of the first connecting block is hinged to the first hinge, the other end of the first connecting block is hinged to the second connecting block via a first hinge axis, and the other end of the second connecting block is hinged to the second hinge;

[0008] The second bridge arm is composed of a third connecting block and a fourth connecting block, one end of the third connecting block is hinged to the first hinge, the other end of the third connecting block is hinged to the fourth connecting block via a second hinge axis, and the other end of the fourth connecting block is hinged to the second hinge;

[0009] Wherein, the first hinge shaft and the second hinge shaft are staggered.

[0010] The hidden hinge according to the embodiment of the first aspect of the present invention has at least the following beneficial effects: the articulated arm of the hidden hinge of this solution includes a first bridge arm and a second bridge arm, and the first bridge arm and the second bridge arm are both composed of multiple connecting blocks, which are foldable structures and optimize the movement trajectory of the articulated arm. When the hidden hinge is in the open state, the articulated arm has a long extension distance, which improves its applicability. When the hidden hinge is in the closed state, the articulated arm is folded and stored, and the required storage space is small, which can reduce the depth of the storage groove in the hinge, which is conducive to matching shallower through-holes. At the same time, the articulated arm of this solution is provided with multiple mutually offset articulated shafts. The offset setting further reduces the articulated arm's demand for storage space. Multiple shorter articulated shafts can enhance the product's rotational rigidity and increase its upper limit on the weight it can bear on the door panel. Under the premise of the same specifications and weight of the door panel, compared with existing products, the hidden hinge of this solution can achieve a smaller volume, more convenient installation and better rotation effect.

[0011] According to the hidden hinge of the first aspect of the present invention, the width A of the first bridge arm is greater than or equal to the width a of the second bridge arm.

[0012] According to the concealed hinge of the first aspect of the present invention, two second bridge arms are provided, and the two second bridge arms are arranged on either side of the first bridge arm. The symmetrical arrangement of the second bridge arms can improve the aesthetics of the product, and providing multiple second bridge arms can effectively enhance the load-bearing capacity of the product.

[0013] According to the hidden hinge described in the first aspect of the present invention, multiple first bridge arms and multiple second bridge arms are provided, and the first bridge arms and the second bridge arms are arranged in an alternating manner. Through this arrangement, the load-bearing capacity of the product is further improved to adapt to heavier door panels.

[0014] According to the concealed hinge described in the first aspect of the present invention, the first hinge axis is close to the first hinge, and the second hinge axis is close to the second hinge. When the concealed hinge is opened and the first hinge and the second hinge are in a horizontal position, the hinge arm is provided with a horizontal section, and the horizontal section is located between the horizontal distance between the first hinge axis and the second hinge axis. The hinge arm of this solution adopts a multiple foldable bridge arm structure, and the horizontal section is provided on the hinge arm. This not only increases the outward extension distance of the hinge arm when the concealed hinge is opened, but also reduces the volume of the hinge arm after folding, thereby reducing the depth of the hinge.

[0015] According to the hidden hinge of the first aspect of the present invention, a first mounting plate is provided on the first hinge, the first connecting block and the first mounting plate are hingedly connected via a third hinge axis, and the third connecting block and the first mounting plate are hingedly connected via a fourth hinge axis;

[0016] The second hinge is provided with a second mounting piece, the second connecting block and the second mounting piece are hingedly connected via a fifth hinge shaft, and the fourth connecting block and the second mounting piece are hingedly connected via a sixth hinge shaft.

[0017] According to the concealed hinge of the first aspect of the present invention, the third hinge axis and the fourth hinge axis are staggered, and the fifth hinge axis and the sixth hinge axis are staggered. This structure further improves the rotational rigidity of the product and facilitates the folding and storage of the bridge arm.

[0018] According to the hidden hinge described in the first aspect of the present invention, an adjustment device is respectively provided in the first hinge and the second hinge, and the adjustment device adjusts the position of the articulated arm relative to the first hinge and the second hinge by adjusting the position of the first mounting plate and the second mounting plate.

[0019] According to the hidden hinge described in the first aspect of the present invention, both the first hinge and the second hinge are provided with a receiving groove. Furthermore, the receiving grooves on the first hinge and the second hinge are of the same size, thereby avoiding difficulties in opening a through hole due to one side being too large.

[0020] According to the hidden hinge described in the first aspect of the present invention, the first hinge, the second hinge and the hinge arm are made of stainless steel and are strong and durable.

[0021] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present application. The purposes and other advantages of the present application can be achieved and obtained through the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0023] Figure 1 This is a front view of the hidden hinge of the first embodiment in the open state.

[0024] Figure 2 It is a three-dimensional structural diagram of the hidden hinge of the first embodiment in the open state.

[0025] Figure 3 It is a three-dimensional structural diagram of the hidden hinge of the first embodiment in the closed state.

[0026] Figure 4 3 is a schematic structural diagram of the hinged arm of the first embodiment in an open state.

[0027] Figure 5 1 is a schematic structural diagram of the hinged arm of the first embodiment in a closed state.

[0028] Figure 6 It is a structural diagram of the hidden hinge of the second embodiment in the open state.

[0029] Description of Figure Numbers:

[0030] First hinge 100, receiving slot 101, mounting hole 102, first adjustment hole 103, first concave-convex structure 104; first mounting plate 110;

[0031] Second hinge 200, second adjustment hole 203, second concave-convex structure 204, second mounting plate 210;

[0032] Articulated arm 300, first bridge arm 310, first connecting block 311, second connecting block 312, first hinge axis 313, third hinge axis 314, fifth hinge axis 315, second bridge arm 320, third connecting block 321, fourth connecting block 322, second hinge axis 323, fourth hinge axis 324, sixth hinge axis 325. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium or intermediate structure, and it can be internal connection between two elements, indirect connection, or an interactive relationship between two elements.

[0035] In the description of this application, it should be noted that "several" means one or more, "multiple" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, and "above," "below," and "within" are understood to include the number itself. The use of "first," "second," and the like in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0036] The embodiments of the present application are further described below with reference to the accompanying drawings.

[0037] Reference Figures 1 to 5 The present application provides a first embodiment, an embodiment of a hidden hinge, which includes a first hinge 100, a second hinge 200 and a hinge arm 300. The first hinge 100, the second hinge 200 and the hinge arm 300 are preferably made of stainless steel, which is strong and durable.

[0038] Reference Figure 1 、 Figure 2 It is easy to imagine that the first hinge 100 is used to be installed on the door panel. The first hinge 100 is provided with a mounting hole 102 for fixed connection with the door panel, and the first hinge 100 is also provided with a receiving groove 101. The second hinge 200 is used to be installed on the door frame. The second hinge 200 is also provided with a receiving groove 101 and a mounting hole 102.

[0039] Preferably, the receiving slot 101 on the first hinge 100 and the receiving slot 101 on the second hinge 200 are of the same size.

[0040] Furthermore, in other embodiments, the receiving slot 101 may be provided on only one of the first hinge 100 or the second hinge 200 .

[0041] like Figure 1 、 Figure 2As shown, the articulated arm 300 is disposed between the first hinge 100 and the second hinge 200. The articulated arm 300 includes a first bridge arm 310 and a second bridge arm 320. By providing two or more bridge arms, the articulated arm 300 can be subdivided, thereby replacing the existing longer articulated axis with several shorter ones, thereby improving the product's rotational rigidity and load-bearing capacity.

[0042] like Figure 1 、 Figure 2 As shown, in this embodiment, two second bridge arms 320 are provided, and the two second bridge arms 320 are symmetrically arranged on both sides of the first bridge arm 310. The symmetrical arrangement of the second bridge arms 320 can improve the aesthetics of the product, and the provision of multiple second bridge arms 320 can effectively enhance the load-bearing capacity of the product.

[0043] In addition, it is easy to imagine that in other embodiments, multiple first bridge arms 310 and second bridge arms 320 can be provided, and the first bridge arms 310 and second bridge arms 320 are arranged alternately. Through this arrangement, the load-bearing capacity of the product can be further improved to adapt to heavier door panels.

[0044] Specifically, such as Figure 2 and Figure 4 As shown, the first bridge arm 310 is composed of a first connecting block 311 and a second connecting block 312. One end of the first connecting block 311 is hinged to the first hinge 100 via a third hinge axis 314, the other end of the first connecting block 311 is hinged to the second connecting block 312 via a first hinge axis 313, and the other end of the second connecting block 312 is hinged to the second hinge 200 via a fifth hinge axis 315. The second bridge arm 320 is composed of a third connecting block 321 and a fourth connecting block 322. One end of the third connecting block 321 is hinged to the first hinge 100 via a fourth hinge axis 324, the other end of the third connecting block 321 is hinged to the fourth connecting block 322 via a second hinge axis 323, and the other end of the fourth connecting block 322 is hinged to the second hinge 200 via a sixth hinge axis 325. Through the above structure, the first bridge arm 310 and the second bridge arm 320 are both foldable structures composed of multiple connecting blocks through hinges, which are convenient for folding and storage, and can increase the outward extension distance when opened, thereby improving the applicability of the product. Figure 3 、 Figure 5 As shown, the first bridge arm 310 and the second bridge arm 320 can effectively reduce the storage volume after being folded.

[0045] Reference Figures 1 to 5In this embodiment, the first hinge axis 313 and the second hinge axis 323 are staggered. Specifically, the first hinge axis 313 is closer to the first hinge 100, and the second hinge axis 323 is closer to the second hinge 200. This staggered arrangement further reduces the storage space required for the hinge arm 300 and the depth of the storage slot 101 in the hinge, facilitating the use of shallower through-holes and simplifying the difficulty of drilling holes in the door panel and door frame.

[0046] Further, such as Figure 2 As shown, in this embodiment, when the hidden hinge is opened and the first hinge 100 and the second hinge 200 are in a horizontal position, a horizontal section is provided on the articulated arm 300, and the horizontal section is located between the horizontal distance between the first hinge axis 313 and the second hinge axis 323. The articulated arm 300 of this solution utilizes a multi-foldable bridge arm structure. The horizontal section provided on the articulated arm 300 not only allows the articulated arm 300 to extend its outward extension when the hidden hinge is opened, but also reduces the volume of the articulated arm 300 after folding, thereby reducing the depth of the hinge. For example, this solution provides a hidden hinge suitable for door panels weighing 60 kg. The articulated arm 300 is provided with a horizontal section. When the articulated arm 300 is fully opened, the horizontal distance between the two hinges can reach 8 cm, ensuring the maximum door opening size.

[0047] Further, such as Figure 4 As shown, in this embodiment, the third hinge axis 314 and the fourth hinge axis 324 are staggered, and the fifth hinge axis 315 and the sixth hinge axis 325 are staggered. The above structure further improves the rotational rigidity of the product and facilitates the folding and storage of the bridge arm.

[0048] like Figure 1 、 Figure 2 As shown, in this embodiment, the width A of the first bridge arm 310 is greater than the width a of the second bridge arm 320. In this embodiment, the first bridge arm 310 is used as the main load-bearing bridge arm, and the second bridge arm 320 is used as the auxiliary load-bearing bridge arm, making the product structure more reasonable and beautiful.

[0049] In addition, it is easy to imagine that in other embodiments, the width A of the first bridge arm 310 may also be equal to the width a of the second bridge arm 320 .

[0050] Reference Figure 6The second embodiment provided by the present invention is an embodiment of a hidden hinge. The hidden hinge also includes a first hinge 100, a second hinge 200 and an articulated arm 300. The articulated arm 300 includes a first bridge arm 310 and a second bridge arm 320. The hidden hinge of this embodiment is largely consistent with the hidden hinge structure provided by the first embodiment. The difference is that the first hinge 100 of this embodiment is provided with a first concave-convex structure 104, and the second hinge 200 is provided with a second concave-convex structure 204. The two concave-convex structures cooperate with each other to achieve a lock when the hidden hinge is closed, so that the two can cooperate better. At the same time, there is no need to provide other locking structures, which can save manufacturing structure and materials, reduce costs, and reduce the thickness of the hidden hinge, further reducing its volume.

[0051] The articulated arm 300 of the hidden hinge of this solution includes a first bridge arm 310 and a second bridge arm 320. The first bridge arm 310 and the second bridge arm 320 are both composed of multiple connecting blocks, forming a foldable structure that optimizes the movement trajectory of the articulated arm 300. When the hidden hinge is in the open state, the articulated arm 300 has a long extension distance, which improves its applicability. When the hidden hinge is in the closed state, the articulated arm 300 is folded and stored, requiring less storage space, which can reduce the depth of the storage groove 101 in the hinge and facilitate the use of shallower through-holes. At the same time, the articulated arm 300 of this solution is provided with multiple mutually offset articulated shafts. Multiple shorter articulated shafts can enhance the rotational rigidity of the product and increase the upper limit of its ability to withstand the weight of the door panel. Under the premise of using door panels of the same specifications and weight, compared with existing products, the hidden hinge of this solution can achieve a smaller size, more convenient installation, and better rotation effect.

[0052] Further, refer to Figure 2 、 Figure 4 、 Figure 5 and Figure 6 In both embodiments of the present invention, a first adjustment hole 103 is provided on the first hinge 100, and a second adjustment hole 203 is provided on the second hinge 200. Adjustment devices are respectively provided in the first adjustment hole 103 and the second adjustment hole 203. Furthermore, a first mounting plate 110 is provided on the first hinge 100. A first connecting block 311 is hingedly connected to the first mounting plate 110 via a third hinge axis 314. A third connecting block 321 is hingedly connected to the first mounting plate 110 via a fourth hinge axis 324. A second mounting plate 210 is provided on the second hinge 200. A second connecting block 312 is hingedly connected to the second mounting plate 210 via a fifth hinge axis 315. A fourth connecting block 322 is hingedly connected to the second mounting plate 210 via a sixth hinge axis 325. The adjustment device adjusts the position of the hinge arm 300 relative to the first hinge 100 and the second hinge 200 by adjusting the position of the first mounting plate 110 and the second mounting plate 210.

[0053] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above implementation mode. Technical personnel familiar with the art can also make various equivalent modifications or substitutions under the shared conditions that do not violate the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A concealed hinge, comprising a first hinge mounted on a door panel and a second hinge mounted on a door frame, wherein at least one of the first hinge and the second hinge is provided with a receiving slot, and an articulated arm is provided between the first hinge and the second hinge, the articulated arm being movably connected to the first hinge and the second hinge, respectively, and when the first hinge and the second hinge are closed, the articulated arm is received in the receiving slot; It is characterized in that The articulated arm includes a first bridge arm and a second bridge arm; The first bridge arm is composed of a first connecting block and a second connecting block, one end of the first connecting block is hinged to the first hinge, the other end of the first connecting block is hinged to the second connecting block via a first hinge axis, and the other end of the second connecting block is hinged to the second hinge; The second bridge arm is composed of a third connecting block and a fourth connecting block, one end of the third connecting block is hinged to the first hinge, the other end of the third connecting block is hinged to the fourth connecting block via a second hinge axis, and the other end of the fourth connecting block is hinged to the second hinge; Wherein, the first hinge shaft and the second hinge shaft are staggered; There are multiple second bridge arms, and the first bridge arms and the second bridge arms are arranged alternately; The first hinge is provided with a first mounting piece, the first connecting block and the first mounting piece are hingedly connected via a third hinge axis, and the third connecting block and the first mounting piece are hingedly connected via a fourth hinge axis; The second hinge is provided with a second mounting piece, the second connecting block and the second mounting piece are hingedly connected via a fifth hinge shaft, and the fourth connecting block and the second mounting piece are hingedly connected via a sixth hinge shaft.

2. The hidden hinge according to claim 1, characterized in that: The width A of the first bridge arm is greater than or equal to the width a of the second bridge arm.

3. The hidden hinge according to claim 1 or 2, characterized in that: There are two second bridge arms, and the two second bridge arms are respectively arranged on both sides of the first bridge arm.

4. The hidden hinge according to claim 1, characterized in that: The first hinge axis is close to the first hinge, and the second hinge axis is close to the second hinge; When the hidden hinge is opened and the first hinge and the second hinge are in a horizontal state, a horizontal section is provided on the hinge arm, and the horizontal section is located between the horizontal distance between the first hinge axis and the second hinge axis.

5. The hidden hinge according to claim 1, characterized in that: The third hinge shaft and the fourth hinge shaft are staggered, and the fifth hinge shaft and the sixth hinge shaft are staggered.

6. The hidden hinge according to claim 1, characterized in that: The first hinge and the second hinge are respectively provided with an adjusting device, and the adjusting device adjusts the position of the hinge arm relative to the first hinge and the second hinge by adjusting the position of the first mounting piece and the second mounting piece.

7. The hidden hinge according to claim 1, characterized in that: The first hinge and the second hinge are both provided with receiving slots.

8. The hidden hinge according to claim 1, characterized in that: The first hinge, the second hinge and the hinge arm are made of stainless steel.

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