A concealed hinge for a door

Abstract

The present invention belongs to the technical field of hinges, and particularly relates to a concealed hinge for a door, which includes a fixed hinge assembly, a movable hinge assembly, a load-bearing arm, an angle arm, and a clearance arm; the load-bearing arm is fixed to the back side of the movable hinge assembly; the middle of the load-bearing arm is rotatably connected to the front end of the angle arm, and the rear end of the load-bearing arm is rotatably connected to the front end of the clearance arm; the fixed hinge assembly is provided with a receiving cavity for accommodating the load-bearing arm, the angle arm, and the clearance arm; the rear ends of the angle arm and the clearance arm are respectively rotatably connected between the upper and lower cavity walls of the receiving cavity. The concealed hinge in this solution can reduce the space occupied by the rotating shaft system in the width of the hinge, and when rotating out of the receiving cavity, it can make the length of the shaft arm extend longer, so as to realize the change in the horizontal length of the shaft system; during the opening process of the door leaf, a safe clearance with the door frame can be ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of hinges, and particularly relates to a concealed hinge for a door leaf. Background Art

[0002] Most of the existing invisible hinges for door leaves adopt a structure with single-axis rotation operation. This kind of structure often requires a relatively large door gap to ensure a safe clearance during opening. At the same time, since the load-bearing part of the shaft needs to bear force, the width of this kind of invisible hinge is relatively large. When it is installed on the door frame or the door leaf, the distance between the hinge and the edge of the door frame or the door leaf is small. When grooving the door leaf or the door frame, it is easy to cause large-area damage to the side of the aluminum alloy skeleton and the wooden panel, affecting the structural stability of the door leaf.

[0003] Therefore, it is necessary to design a concealed hinge structure for a door leaf with a hidden shaft and a lower width. Summary of the Invention

[0004] In order to solve the above problems existing in the prior art, this solution provides a concealed hinge for a door leaf.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A concealed hinge for a door leaf includes a fixed hinge assembly, a movable hinge assembly, a load-bearing arm, an angle arm, and a clearance arm; the load-bearing arm is fixed to the back side of the movable hinge assembly; the middle part of the load-bearing arm is rotatably connected to the front end of the angle arm, and the rear end of the load-bearing arm is rotatably connected to the front end of the clearance arm; the fixed hinge assembly is provided with a receiving cavity for receiving the load-bearing arm, the angle arm, and the clearance arm; the rear ends of the angle arm and the clearance arm are respectively rotatably connected between the upper and lower cavity walls of the receiving cavity.

[0007] As an alternative structure or supplementary design of the above concealed hinge for a door leaf: the rear end of the angle arm is located in front of the rear end of the clearance arm; the clearance arm is L-shaped and has an avoidance notch for avoiding the rear end of the angle arm.

[0008] As an alternative structure or supplementary design of the above concealed hinge for a door leaf: the lengths of the angle arm and the clearance arm are both the width of the receiving cavity.

[0009] As an alternative structure or supplementary design of the above concealed hinge for a door leaf: the middle part of the load-bearing arm is bent.

[0010] As an alternative structure or supplementary design of the above concealed hinge for a door leaf: the movable hinge assembly includes a movable hinge seat and a movable hinge body; the movable hinge seat is strip-shaped, and an adjustment groove is provided on the back side of the movable hinge seat; the movable hinge body is detachably arranged in the adjustment groove and can be adjusted up and down in position; the front end of the load-bearing arm is fixedly connected to the movable hinge seat.

[0011] As an alternative structure or supplementary design for the above-mentioned concealed hinge of the door: waist-shaped holes are provided at both the upper and lower ends of the movable hinge body.

[0012] As an alternative structure or supplementary design for the above-mentioned concealed hinge of the door: the fixed hinge assembly includes a fixed hinge outer shell and a fixed hinge inner seat; the fixed hinge outer shell has an installation groove, and fixed hinge inner seats are respectively provided at the upper groove wall and the lower groove wall of the installation groove; the angle arm and the clearance arm are rotatably connected between the two fixed hinge inner seats, and the accommodation cavity is also formed between the two fixed hinge inner seats.

[0013] As an alternative structure or supplementary design for the above-mentioned concealed hinge of the door: rotating shafts are respectively provided at the corresponding rotating connection positions of the load-bearing arm, the angle arm, the clearance arm and the fixed hinge inner seat.

[0014] As an alternative structure or supplementary design for the above-mentioned concealed hinge of the door: ear grooves are respectively provided at the upper groove wall and the lower groove wall of the installation groove; adjusting ears are provided on the fixed hinge inner seat, and the adjusting ears are embedded in the ear grooves; gaskets are provided at the bottom of the ear grooves, and adjusting screws are threadedly connected to the adjusting ears; the tip of the adjusting screw is columnar and rotatably cooperates with the gasket; an arc-shaped step groove is provided at the side edge of the adjusting ear; the nut of the screw connected to the fixed hinge outer shell can abut against the arc-shaped step groove to lock the adjusting ear.

[0015] As an alternative structure or supplementary design for the above-mentioned concealed hinge of the door: permanent magnets are respectively embedded on the front side of the fixed hinge assembly and the rear side of the movable hinge assembly, and a decorative cover is magnetically attracted to the permanent magnets.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. In this solution, the rotating shaft system of the hinge is composed of three parts, namely a load-bearing arm, an angle arm and a clearance arm, and forms a multi-axis body structure. When rotating into the accommodation cavity, it can reduce the space occupied by the rotating shaft system in the width of the hinge, and when rotating out of the accommodation cavity, it can make the length of the shaft arm extend longer, so as to realize the change of the shaft system in the horizontal length.

[0018] 2. The technology in this solution can make the edge value of the hinge larger, and when grooving the door leaf, it does not damage the aluminum alloy skeleton and panel of the door leaf, making the structure more stable.

[0019] 3. When used on the door, this solution can ensure a safe clearance between the door leaf and the door frame during the opening process of the door leaf, and at the same time, after opening, the trajectory of the rotating shaft system is limited to a specified range, so that the door leaf will not turn outwards excessively and squeeze the door frame. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of this solution or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art.

[0021] Figure 1 is the three-dimensional structure diagram of the concealed hinge for the door in this solution;

[0022] Figure 2 is the sectional structure diagram of the concealed hinge for the door in this solution;

[0023] Figure 3 is the exploded structure diagram of the fixed hinge assembly in this solution.

[0024] In the figure: 1 - moving hinge seat; 2 - moving hinge body; 21 - load-bearing arm; 22 - waist-shaped hole; 3 - permanent magnet; 4 - fixed hinge housing; 41 - installation groove; 42 - ear groove; 5 - fixed hinge inner seat; 51 - adjusting ear; 52 - arc-shaped step groove; 6 - adjusting screw; 61 - washer; 7 - safety screw; 8 - angle arm; 9 - clearance arm. Specific implementation mode

[0025] Next, the technical solutions in this embodiment will be clearly and completely described in conjunction with the accompanying drawings. The described embodiments are only a part of the embodiments, rather than all of them. Based on the embodiments in this solution, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this solution.

[0026] Embodiment 1

[0027] As Figures 1 to 3 shown, this embodiment designs a concealed hinge for the door, including components such as a fixed hinge assembly, a moving hinge assembly, a load-bearing arm 21, an angle arm 8, and a clearance arm 9.

[0028] The moving hinge assembly includes two main parts, namely a moving hinge seat 1 and a moving hinge body 2; the moving hinge seat 1 is strip-shaped, and screw holes are provided at both ends of the moving hinge seat 1. When the concealed hinge is installed, both ends of the moving hinge seat 1 are fixed to the side of the door leaf by screws passing through the screw holes. An adjusting groove is provided on the back side of the moving hinge seat 1, and internal threaded holes are provided at both ends of the adjusting groove; the moving hinge body 2 is detachably arranged in the adjusting groove, and at the same time, the length of the moving hinge body 2 is less than the length of the adjusting groove, so that the moving hinge body 2 can be adjusted up and down in the adjusting groove. Waist-shaped holes 22 are provided at both the upper and lower ends of the moving hinge body 2. Fastening screws passing through the waist-shaped holes 22 and threadedly mating with the internal threaded holes can fix the relative positions of the moving hinge seat 1 and the moving hinge body 2.

[0029] The fixed hinge assembly includes two parts: a fixed hinge outer shell 4 and a fixed hinge inner seat 5; on the front side of the fixed hinge outer shell 4, there is an installation groove 41. On the upper groove wall and the lower groove wall of the installation groove 41, there is respectively a fixed hinge inner seat 5, which is detachably and fixedly connected to the fixed hinge outer shell 4. In addition, it should be noted that: the two fixed hinge inner seats 5 can be the upper and lower parts of an integrally formed inner shell; the angle arm 8 and the clearance arm 9 are rotatably connected between the two fixed hinge inner seats 5, and a receiving cavity is formed between the two fixed hinge inner seats 5, so as to facilitate the accommodation of the rotating shaft system composed of the load-bearing arm 21, the angle arm 8, the clearance arm 9, etc. The front side and the left side of this receiving groove should both have openings, so as to facilitate the storage and deployment of the rotating shaft system. During use, a groove is opened on the door frame, and the rear part of the fixed hinge outer shell 4 is inserted into the groove, so as to fix the fixed hinge assembly on the door frame.

[0030] In order to facilitate the adjustment of the relative position between the fixed hinge inner seat 5 and the fixed hinge outer shell 4, on the upper side of the upper groove wall and the lower side of the lower groove wall of the installation groove 41, there are respectively ear grooves 42, and the side surface of the ear groove 42 communicates with the installation groove 41; on the opposite sides of the two fixed hinge inner seats 5, there are adjustment ears 51. When the fixed hinge inner seat 5 and the fixed hinge outer shell 4 are assembled, the adjustment ears 51 are embedded in the ear grooves 42; at the bottom of the ear groove 42, there is a washer 61, and this washer 61 can be a copper washer and is fixed to the inner bottom or the outer bottom of the ear groove 42. An adjustment screw 6 is threadedly connected to the adjustment ear 51. The tip of the adjustment screw 6 is columnar, and the columnar part is in rotational cooperation with the washer 61, so that the adjustment screw 6 can rotate relative to the fixed hinge outer shell 4 without axial movement. Thus, when the adjustment screw 6 rotates, it can drive the fixed hinge inner seat 5 to move relative to the fixed hinge outer shell 4, so as to adjust the depth position of the fixed hinge inner seat 5 in the installation groove 41.

[0031] In addition, an arc-shaped step groove 52 is provided at the side edge of the adjustment ear 51; the nut of the screw connected to the fixed hinge outer shell 4 can abut against the arc-shaped step groove 52 to lock the adjustment ear 51.

[0032] To achieve the relative rotation of the fixed hinge assembly and the movable hinge assembly, the load-bearing arm 21 is fixed to the back side of the movable hinge assembly. Specifically, the front end of the load-bearing arm 21 is fixedly connected to the back side of the movable hinge seat 1, and the load-bearing arm 21 and the movable hinge seat 1 can also be integrally formed structures; the middle part of the load-bearing arm 21 is bent and rotatably connected to the front end of the angle arm 8, and the rear end of the load-bearing arm 21 is rotatably connected to the front end of the clearance arm 9; the fixed hinge assembly is provided with a receiving cavity for receiving the load-bearing arm 21, the angle arm 8 and the clearance arm 9; the rear ends of the angle arm 8 and the clearance arm 9 are respectively rotatably connected between the upper and lower cavity walls of the receiving cavity. The rear end of the angle arm 8 is located in front of the rear end of the clearance arm 9; the clearance arm 9 is L-shaped and has an avoidance notch for avoiding the rear end of the angle arm 8. The lengths of the angle arm 8 and the clearance arm 9 are both the width of the receiving cavity.

[0033] Rotating shafts are respectively arranged at the corresponding rotating connection positions of the load-bearing arm 21, the angle arm 8, the clearance arm 9 and the fixed hinge inner seat 5. Specifically, the middle part of the load-bearing arm 21 and the front end of the angle arm 8 are rotatably connected by a first rotating shaft, the rear end of the angle arm 8 and the fixed hinge inner seat 5 are rotatably connected by a second rotating shaft, the front end of the clearance arm 9 and the rear end of the load-bearing arm 21 are rotatably connected by a third rotating shaft, and the rear end of the clearance arm 9 and the fixed hinge inner seat 5 are rotatably connected by a fourth rotating shaft. The rotating shaft system composed of the load-bearing arm 21, the angle arm 8 and the clearance arm 9 can form a multi-axis body structure, which can reduce the space occupied by the rotating shaft system in the hinge width when rotating into the receiving cavity, and when rotating out of the receiving cavity, it can make the length of the shaft arm extend longer, so as to realize the change of the shaft system in the horizontal length.

[0034] When the rotating shaft system rotates into the receiving groove, the movable hinge assembly not only rotates, but also approaches the fixed hinge assembly. When the rotating shaft system rotates out of the receiving groove, the movable hinge assembly not only rotates, but also moves away from the fixed hinge assembly, so that the moving track of the movable hinge assembly can be similar to an involute, so that when the fixed hinge assembly and the movable hinge assembly are in the state of being embedded on the door leaf and the door frame, it is ensured that during the opening and closing of the door leaf, the edges of the door leaf and the door frame on both sides in the width direction of the concealed hinge do not collide, thus ensuring the safety during the opening and closing of the door. At the same time, since the overall length of the rotating shaft system will change in length during the opening and closing states, even when the width of the fixed hinge assembly is relatively narrow, it can also ensure that the movable hinge assembly extends a sufficient distance.

[0035] In addition, permanent magnets 3 can be respectively embedded on the front side of the fixed hinge assembly and the rear side of the movable hinge assembly, and corresponding decorative covers are magnetically attracted on the permanent magnets, so as to block the screws, thereby improving the aesthetic degree of the exposed part of the concealed hinge.

[0036] When the concealed hinge structure in this embodiment is used on a door, it can ensure a safe clearance between the door leaf and the door frame during the opening process of the door leaf. At the same time, after the door leaf is opened, the trajectory of the rotating shaft system is limited to a specified range, so that the door leaf will not turn outwards excessively and squeeze the door frame.

[0037] The above embodiments are only examples given for the sake of clarity and are not limitations on the implementation manners; it is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present technology.

Claims

1. A concealed hinge for a door, characterized in that: It includes a fixed hinge assembly, a moving hinge assembly, a load-bearing arm (21), an angle arm (8) and a clearance arm (9); the load-bearing arm (21) is fixed to the back side of the moving hinge assembly; the middle part of the load-bearing arm (21) is rotatably connected to the front end of the angle arm (8), and the rear end of the load-bearing arm (21) is rotatably connected to the front end of the clearance arm (9); the fixed hinge assembly is provided with a receiving cavity for receiving the load-bearing arm (21), the angle arm (8) and the clearance arm (9); the rear ends of the angle arm (8) and the clearance arm (9) are respectively rotatably connected between the upper and lower cavity walls of the receiving cavity; the rear end of the angle arm (8) is located on the front side of the rear end of the clearance arm (9); the clearance arm (9) is L-shaped and has an avoidance notch for avoiding the rear end of the angle arm (8); the middle part of the load-bearing arm (21) is bent; the fixed hinge assembly includes a fixed hinge housing (4) and a fixed hinge inner seat (5); the fixed hinge housing (4) has a mounting groove (41), and fixed hinge inner seats (5) are respectively arranged at the upper and lower groove walls of the mounting groove (41); the angle arm (8) and the clearance arm (9) are rotatably connected between the two fixed hinge inner seats (5), and the receiving cavity is also formed between the two fixed hinge inner seats (5); ear grooves (42) are respectively arranged at the upper and lower groove walls of the mounting groove (41); adjusting ears (51) are arranged on the fixed hinge inner seat (5), and the adjusting ears (51) are embedded in the ear grooves (42); a washer (61) is arranged at the bottom of the ear groove (42), and an adjusting screw (6) is threadedly connected to the adjusting ear (51); the tip of the adjusting screw (6) is columnar and rotatably cooperates with the washer (61); an arc-shaped step groove (52) is arranged at the side edge of the adjusting ear (51); the nut of the screw connected to the fixed hinge housing (4) can abut against the arc-shaped step groove (52) to lock the adjusting ear (51).

2. The concealed hinge for a door according to claim 1, wherein: the moving hinge assembly includes a moving hinge base (1) and a moving hinge body (2); the moving hinge base (1) is strip-shaped, and an adjusting groove is arranged on the back side of the moving hinge base (1); the moving hinge body (2) is detachably arranged in the adjusting groove and can be adjusted up and down; the front end of the load-bearing arm (21) is fixedly connected to the moving hinge base (1).

3. The concealed hinge for a door according to claim 2, characterized in that: waist-shaped holes (22) are arranged at both the upper and lower ends of the moving hinge body (2).

4. The concealed hinge for a door according to claim 1, characterized in that: rotating shafts are respectively arranged at the corresponding rotating connection parts of the load-bearing arm (21), the angle arm (8), the clearance arm (9) and the fixed hinge inner seat (5).

5. The concealed hinge for a door according to claim 1, characterized in that: permanent magnets (3) are respectively embedded on the front side of the fixed hinge assembly and the rear side of the moving hinge assembly, and corresponding decorative covers are magnetically attracted to the permanent magnets.

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