Concealed hinge structure

Abstract

The utility model relates to the technical field of building hardware, disclose a kind of hidden hinge structure, comprising: first hinge seat, second hinge seat and the hinge assembly of connecting the first hinge seat with the second hinge seat, wherein, the middle part of the first hinge seat is provided with accommodating cavity;Second hinge seat is equipped with the connecting portion extending into the accommodating cavity;The hinge assembly includes: first hinged arm and second hinged arm, wherein, the both ends of the first hinged arm are respectively rotationally connected with the bottom of the accommodating cavity and the distal end of the connecting portion;The both ends of the second hinged arm are respectively rotationally connected with the open end of the accommodating cavity and the proximal end of the connecting portion;Wherein, when hinge rotates and closes, the first hinge seat, the second hinge seat and the hinge assembly are all accommodated in the accommodating cavity.The hidden hinge structure is convenient to adjust, and the structure is reasonable, and the hiding effect is good.

Description

Technical Field

[0001] This utility model relates to the field of architectural hardware technology, specifically to a concealed hinge structure. Background Technology

[0002] In modern interior design and furniture manufacturing, hinges are crucial components connecting door panels to door frames. Traditional hinges, after installation, leave parts of their structure exposed in the door seams, affecting the overall aesthetics. To address this issue, concealed hinges were developed. Existing concealed hinges typically hide the hinge assembly inside the door panel, but some structural shortcomings remain.

[0003] First, many concealed hinges require deep grooves to be cut into the door leaf and frame to accommodate complex linkage mechanisms. This not only reduces the structural strength of the door leaf and frame, especially for thin doors or doors made of new materials, where excessively deep grooves may pose a risk of breakage; it also requires extremely high precision in the groove cutting, increasing the difficulty of on-site installation. Second, the adjustment functions of existing concealed hinges are often inadequate. After long-term use, door leaves may sag or become misaligned. If the hinges cannot be easily and precisely adjusted in multiple directions, it is difficult to correct the door leaf position, affecting the user experience. Furthermore, some concealed hinges have many components and complex structures, resulting in higher production costs, and even when closed, some components may still be exposed, failing to achieve a completely "concealed" effect.

[0004] Therefore, there is an urgent need for a hinge structure that can achieve true concealment, be easy to adjust, and have minimal impact on the structural strength of the door. Utility Model Content

[0005] This utility model was made to solve the above-mentioned technical problems, in order to solve the problem that the existing hinges have a thick shell, resulting in deep openings in the door leaf and door frame, which reduces the strength of the door frame.

[0006] According to one embodiment of the present invention, a concealed hinge structure is provided, comprising: a first hinge seat, a second hinge seat, and a hinge assembly connecting the first hinge seat and the second hinge seat, wherein... The first hinge seat has a receiving cavity in the middle; The second hinge seat is provided with a connecting portion extending into the receiving cavity; The hinge assembly includes: a first hinge arm and a second hinge arm, wherein... The two ends of the first hinge arm are rotatably connected to the bottom of the accommodating cavity and the distal end of the connecting part, respectively. The two ends of the second hinge arm are rotatably connected to the opening end of the accommodating cavity and the proximal end of the connecting portion, respectively; wherein, When the hinge rotates to close, the first hinge seat, the second hinge seat, and the hinge assembly are all accommodated within the receiving cavity.

[0007] As one embodiment, a left-right adjustment component is provided within the accommodating cavity; The left and right adjustment assembly includes: an adjustment block slidably disposed within the accommodating cavity and adjustment members respectively disposed at both ends of the adjustment block, wherein, The adjusting member is threadedly connected to the adjusting block and is used to drive the adjusting block to move along the inner side of the accommodating cavity; One end of both the first hinge arm and the second hinge arm is hinged to the adjusting block.

[0008] In one embodiment, the adjusting member rotates about its own axis at the bottom of the accommodating cavity.

[0009] In one embodiment, the connecting part and the second hinge seat are integrally formed.

[0010] In one embodiment, a front-to-back adjustment component is provided on the first hinge seat, and a vertical adjustment component is provided on the second hinge seat.

[0011] In one embodiment, the front-to-back adjustment assembly includes: a first elongated hole disposed on the first hinge seat and a first fastener cooperating with the first elongated hole, wherein, The front and rear mounting positions of the first hinge seat on the door leaf can be adjusted by loosening the first fastener.

[0012] In one embodiment, the up-and-down adjustment assembly includes: a second elongated hole disposed on the second hinge seat and a second fastener cooperating with the second elongated hole, wherein, The vertical mounting position of the second hinge seat on the door leaf can be adjusted by loosening the second fastener.

[0013] As one implementation, a bushing is provided at the hinge point of the first hinge arm and the second hinge arm.

[0014] In one embodiment, the second hinge seat is a thin plate with a thickness less than that of the first hinge seat.

[0015] In one embodiment, the depth of the accommodating cavity is greater than or equal to the total thickness of the hinge assembly when closed.

[0016] Based on the above description and practice, it can be seen that the concealed hinge structure in this utility model achieves complete concealment when the hinge is closed by designing the second hinge seat as a connecting part structure that is inserted into the receiving cavity and storing all moving parts in the receiving cavity of the first hinge seat. The appearance is simple and beautiful. Furthermore, the second hinge seat can be designed as a thin plate, and the door frame side does not need or only needs very shallow grooves, thus protecting the original strength of the door frame to the greatest extent. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the concealed hinge structure involved in Embodiment 1 of this utility model.

[0018] Figure 2 This is a schematic diagram of the hinge assembly in the accommodating cavity according to Embodiment 1 of this utility model.

[0019] Figure 3 This is a side view of the concealed hinge structure involved in Embodiment 1 of this utility model.

[0020] The attached figures are labeled as follows: 1. First hinge seat; 11. Receiving cavity; 12. First elongated hole; 2. Second hinge seat; 21. Connecting part; 22. Second elongated hole; 3. Hinge assembly; 31. First hinge arm; 32. Second hinge arm; 33. Bushing; 4. Adjusting block; 5. Adjusting component. Detailed Implementation

[0021] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0022] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. It should be noted that in this disclosure, the terms "comprising," "configured with," and "set in" are used to indicate an open-ended inclusion, meaning that additional elements / components / etc. may exist besides those listed; the terms "first," "second," etc., are used only as labels and are not intended to limit the number or order of objects; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] This utility model provides a concealed hinge structure, which is reasonably structured, easy to adjust, and has a good concealment effect. The following describes its features. Figures 1 to 3 This section explains the hidden hinge structure.

[0025] The concealed hinge structure in this embodiment mainly includes: a first hinge seat 1, a second hinge seat 2, and a hinge assembly 3. The first hinge seat 1 has a receiving cavity 11 extending through its length in the middle. The receiving cavity 11 is a U-shaped or C-shaped channel structure, providing space for accommodating other moving parts. The second hinge seat 2 is a structure for fixing to the door frame. The main body of the second hinge seat 2 is a relatively flat thin plate, less thick than the first hinge seat 1, with a connecting part 21 extending from one side. The thin plate allows for better installation and fixation of the second hinge seat 2. This connecting part 21 is inserted into the receiving cavity 11 of the first hinge seat 1 after the hinge is installed.

[0026] Furthermore, the hinge assembly 3 connects the first hinge seat 1 and the second hinge seat 2. The hinge assembly 3 consists of a first hinge arm 31 and a second hinge arm 32. One end of the first hinge arm 31 is rotatably connected to the bottom region of the receiving cavity 11, that is, the region farthest from the opening, via a pin. The other end of the first hinge arm 31 is rotatably connected to the region farthest from the door frame on the connecting part 21 of the second hinge seat 2 via another pin. Correspondingly, one end of the second hinge arm 32 is rotatably connected to the opening region of the receiving cavity 11, that is, the region near the edge of the door leaf. The other end of the second hinge arm 32 is rotatably connected to the region near the door frame on the connecting part 21.

[0027] Furthermore, when the door is closed, the connecting part 21 of the second hinge seat 2 is fully embedded in the receiving cavity 11 of the first hinge seat 1, and the first hinge arm 31 and the second hinge arm 32 are also completely hidden inside the receiving cavity 11 by rotation and folding. At this time, when viewed from the outside of the door, no hinge components are visible, and the joint between the door and the door frame is clean and neat, with excellent aesthetics. When it is necessary to open the door, a pushing force is applied, and the two hinge arms leave the receiving cavity 11, allowing the door to open and rotate smoothly. The entire process is smooth and noiseless.

[0028] Furthermore, a left-right adjustment assembly is provided within the accommodating cavity 11 to fine-tune the left-right position of the door leaf, compensating for installation errors or ensuring the sealing between the door leaf and the door frame. The left-right adjustment assembly includes an adjustment block 4 and an adjustment element 5. The shape of the adjustment block 4 matches the internal contour of the accommodating cavity 11, allowing it to slide smoothly along the left-right direction within the cavity. The adjustment block 4 has an adjustment screw hole with internal threads. The adjustment element 5 is preferably an adjustment bolt, located at both ends of the adjustment block 4. Specifically, a mounting hole is provided at each end of the adjustment block 4. The screw portion of the adjustment bolt passes through the mounting hole, but its upper end is restricted within a groove or retaining ring outside the accommodating cavity 11, allowing the adjustment bolt to rotate only around its own central axis and preventing vertical (axial) movement. The upper end of the adjustment bolt is threaded and screwed into the adjustment screw hole of the adjustment block 4. When the left-right adjustment function is needed, the operator simply uses a screwdriver or hex wrench to rotate the head of the adjustment bolt, thereby moving the adjustment block 4 horizontally. Since one end of the hinge assembly 3 is mounted on the adjusting block 4, the movement of the adjusting block 4 directly affects the left-right position of the door leaf relative to the door frame. The left-right adjusting assembly has a simple structure, is easy to operate, has high precision, and can effectively control the width of the door gap.

[0029] Furthermore, a front-to-back adjustment component is provided on the first hinge seat 1, and a vertical adjustment component is provided on the second hinge seat 2. The front-to-back adjustment component and the vertical adjustment component make the adjustment in each direction independent of each other and do not interfere with each other. Users can use these adjustment functions individually or in combination according to the actual misalignment of the door leaf.

[0030] Furthermore, the front-to-back adjustment assembly includes a first elongated hole 12 disposed on the first hinge seat 1 and a first fastener that engages with the first elongated hole 12. The front-to-back installation position of the first hinge seat 1 on the door leaf can be adjusted by loosening the first fastener. The front-to-back adjustment assembly is mainly used to adjust the front-to-back distance when the door leaf and door frame are on the same plane, solving the problem of the door leaf tilting forward or backward. One or more first elongated holes 12 are provided on the seat of the first hinge seat 1 along the thickness direction (i.e., the front-to-back direction) of the door leaf. During installation, the first fastener used to fix the first hinge seat 1 to the door leaf passes through the first elongated hole 12 and is then screwed into the pre-set threaded hole in the door leaf.

[0031] Furthermore, during initial installation or when adjustments are needed, the first fastener is not immediately tightened completely. At this time, due to the gap between the first fastener and the first elongated hole 12, the entire first hinge seat 1 can slide along the length of the first elongated hole 12, that is, the front-to-back direction of the door leaf. The installer can observe the flushness of the door leaf and the door frame by pushing the door leaf or directly moving the first hinge seat 1. Once adjusted to the ideal position, the first fastener is then completely tightened using a tool. At this point, the first hinge seat 1 is firmly fixed to the door leaf.

[0032] Furthermore, the height adjustment assembly includes a second elongated hole 22 provided on the second hinge seat 2 and a second fastener that mates with the second elongated hole 22. Loosening the second fastener allows adjustment of the hinge's vertical mounting position on the door leaf. The height adjustment assembly is used to correct sagging of the door leaf caused by its own weight or hinge wear, restoring it to its original position. Specifically, the height adjustment assembly is connected to the second hinge seat 2 via the second fastener. One or more second elongated holes 22 are provided on the second hinge seat 2 along the height direction of the door leaf. Similarly, the height adjustment assembly is connected to the front-rear adjustment assembly via a second fastener passing through this second elongated hole 22.

[0033] Furthermore, when adjusting the vertical position of the door leaf, first loosen the second fastener. Since the second fastener has room to move within the second elongated hole 22, the vertical adjustment seat can then slide up and down relative to the front-to-back adjustment assembly already fixed to the door leaf. After adjusting to the desired height, tighten the second fastener to secure the vertical position.

[0034] Furthermore, the diameter of the first elongated hole 12 and the second elongated hole 22 on the side closer to the door frame and door panel is smaller than the diameter on the side farther from the door frame and door panel. Also, the size of the top of the first fastener and the second fastener is smaller than the diameter on the side farther from the door frame and door panel, but larger than the diameter on the side closer to the door frame and door panel. This ensures that when adjusting the hinge's installation position on the door leaf using the first and second fasteners, the tops of the first and second fasteners are always positioned between the first elongated hole 12 and the second elongated hole 22. This not only improves the appearance of the installation but also prevents damage to the door frame and door body during tightening.

[0035] Furthermore, the second hinge seat 2 and the connecting part 21 preferably adopt an integral molding structure, that is, the second hinge seat 2 and the connecting part 21 extending into the accommodating cavity 11 are manufactured as a single part from the same metal sheet through processes such as stamping, bending, precision casting, or CNC machining, without any welded or bolted joints. First, the integral molding structure eliminates stress concentration at the connection point, making the hinge more durable when subjected to the load of repeated opening and closing of the door leaf. Second, the integral molding structure reduces the number of parts and assembly steps, improving production efficiency and reducing manufacturing costs. Finally, the integral molding structure ensures a highly rigid connection between the connecting part 21 and the second hinge seat 2, ensuring the stability and accuracy of the hinge during movement.

[0036] Furthermore, bushings 33 are provided at each hinge point of the first hinge arm 31 and the second hinge arm 32 to improve the feel of the hinges when opening and closing, reduce wear and noise, and extend service life. When the hinge arm rotates, the frictional resistance of the bushings 33 is much less than the direct friction between metals, making it easier and smoother to open and close the door, and effectively avoiding the harsh noise caused by dry metal friction.

[0037] Furthermore, the depth of the receiving cavity 11 is greater than or equal to the total thickness of the hinge assembly 3 when closed, ensuring that when the door is closed, the connecting portion 21 of the first hinge arm 31, the second hinge arm 32, and the second hinge seat 2 can be completely disposed within the receiving cavity 11. If the depth of the receiving cavity 11 is less than the total thickness, then when the hinge is closed, some parts of the hinge assembly 3 will protrude above the opening plane of the receiving cavity 11, causing the first hinge seat 1 to fail to fully fit with the groove of the door leaf, thus compromising the concealment effect. In the design, a certain safety margin is usually left, that is, the cavity depth is slightly greater than the component's closed thickness, to ensure that the concealment effect remains reliable even under manufacturing tolerances or long-term wear.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A concealed hinge structure, characterized in that, include: A first hinge seat, a second hinge seat, and a hinge assembly connecting the first hinge seat and the second hinge seat, wherein, The first hinge seat has a receiving cavity in the middle; The second hinge seat is provided with a connecting portion extending into the receiving cavity; The hinge assembly includes: a first hinge arm and a second hinge arm, wherein... The two ends of the first hinge arm are rotatably connected to the bottom of the accommodating cavity and the distal end of the connecting part, respectively. The two ends of the second hinge arm are rotatably connected to the opening end of the accommodating cavity and the proximal end of the connecting portion, respectively; wherein, When the hinge rotates to close, the first hinge seat, the second hinge seat, and the hinge assembly are all accommodated within the receiving cavity.

2. The concealed hinge structure as described in claim 1, characterized in that, A left-right adjustment assembly is provided inside the accommodating cavity; The left and right adjustment assembly includes: an adjustment block slidably disposed within the accommodating cavity and adjustment members respectively disposed at both ends of the adjustment block, wherein, The adjusting member is threadedly connected to the adjusting block and is used to drive the adjusting block to move along the inner side of the accommodating cavity; One end of both the first hinge arm and the second hinge arm is hinged to the adjusting block.

3. The concealed hinge structure as described in claim 2, characterized in that, The adjusting member rotates about its own axis at the bottom of the accommodating cavity.

4. The concealed hinge structure as described in claim 1, characterized in that, The connecting part and the second hinge seat are integrally formed.

5. The concealed hinge structure as described in claim 1, characterized in that, A front-to-back adjustment component is provided on the first hinge seat, and a vertical adjustment component is provided on the second hinge seat.

6. The concealed hinge structure as described in claim 5, characterized in that, The front-to-back adjustment assembly includes: a first elongated hole disposed on the first hinge seat and a first fastener cooperating with the first elongated hole, wherein... The front and rear mounting positions of the first hinge seat on the door leaf can be adjusted by loosening the first fastener.

7. The concealed hinge structure as described in claim 6, characterized in that, The up-and-down adjustment assembly includes: a second elongated hole disposed on the second hinge seat and a second fastener cooperating with the second elongated hole, wherein... The vertical mounting position of the second hinge seat on the door leaf can be adjusted by loosening the second fastener.

8. The concealed hinge structure as described in claim 1, characterized in that, A bushing is provided at the hinge point of the first hinge arm and the second hinge arm.

9. The concealed hinge structure as described in claim 1, characterized in that, The second hinge seat is a thin plate, and its thickness is less than that of the first hinge seat.

10. The concealed hinge structure as described in claim 1, characterized in that, The depth of the accommodating cavity is greater than or equal to the total thickness of the hinge assembly when closed.

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