Hidden adjustable hinge

Abstract

The utility model discloses a hidden type adjustable hinge which comprises a door leaf hinge assembly, a rotating arm and a door frame hinge assembly, the door leaf hinge assembly comprises a door leaf fixing plate and hinge connecting pieces, a plurality of positioning grooves are formed in the door leaf fixing plate, the hinge connecting pieces are correspondingly fixed to the positioning grooves, and a plurality of fixing holes are formed in the hinge connecting pieces; the door frame hinge assembly comprises a door frame fixing plate and a right-angle connecting piece, and a rotating arm notch is formed in the door frame fixing plate; the rotating arm is of a U-shaped structure, one side of the rotating arm is hinged to the right-angle connecting piece, a plurality of first kidney-shaped grooves matched with the fixing holes are formed in the other side of the rotating arm, and the fastener penetrates through the first kidney-shaped grooves and is matched with the fixing holes to fix the rotating arm to the hinge connecting piece; when the hinge rotates to be closed, the rotating arm penetrates through and is hidden in the rotating arm notch. After the structure is adopted, the anti-theft door has the advantages of simple and reasonable structure, staggered installation, adjustable door leaf position, good locking performance and anti-theft performance and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-theft door hinges, in particular to a concealed adjustable hinge with a door frame and door leaf which can be installed separately and can be adjusted in front, back, left, right, up and down directions, and with a hinge shaft not exposed. Background Art

[0002] Commercial housing units are now typically delivered fully furnished. During renovations, real estate developers require that security doors be installed first before caulking and decorating the door frame and its surroundings. However, due to the frequent movement of materials and tools during renovation, the door panels can easily be damaged or scratched, leading to unnecessary repairs and rework. To address these issues, manufacturers have developed hinges that allow for separate installation of the door frame and panel. Installation begins with the door frame, and the panel is then installed after the interior is fully renovated, ensuring the security door remains intact. For example, Chinese Patent Publication No. CN210563962U discloses an open hinge with adjustable vertical and horizontal clearances. However, these hinges have been found to have the following problems: First, the structure is complex, requiring high precision fitting and making production and processing difficult; second, the exposed hinge axis is not only aesthetically pleasing but also compromises the security door's performance; third, the heavy use of various metals and glass contributes to the door's weight and insufficient locking force. This leads to a common phenomenon of door sagging after installation, which can even render the security door inoperable. In response to the above problems, many manufacturers and knowledgeable people have carried out development and research, but so far no ideal product that completely solves this problem has been launched. Summary of the Invention

[0003] In order to overcome the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide a concealed adjustable hinge with a simple and reasonable structure, convenient production and processing, staggered installation of door leaves and door frames, adjustable door leaf position during installation, and good locking and anti-theft performance.

[0004] The utility model adopts a technical solution to solve the above-mentioned technical problems, which includes a door leaf hinge assembly, a rotating arm, and a door frame hinge assembly. The door leaf hinge assembly includes a door leaf fixing plate and a hinge connecting piece. The door leaf fixing plate is provided with a plurality of positioning grooves, and the hinge connecting piece is fixed on the positioning grooves accordingly. The hinge connecting piece is provided with a plurality of fixing holes; the door frame hinge assembly includes a door frame fixing plate and a right-angle connector connected to the door frame fixing plate, and the door frame fixing plate is provided with a rotating arm slot that cooperates with the rotating arm; the rotating arm is a U-shaped structure, one side of which is hinged to the right-angle connector through a hinge shaft, and the other side is provided with a plurality of first kidney slots that cooperate with the fixing holes and are used to adjust the left and right positions of the door leaf, and the fastener passes through the first kidney slot and cooperates with the fixing hole to fix the rotating arm to the hinge connecting piece; when the hinge is rotated and closed, the rotating arm passes through and is hidden in the rotating arm slot of the door frame fixing plate.

[0005] According to a further solution of the present invention, a fourth protrusion and a first protrusion for increasing the locking force are correspondingly provided on the joint surface where the hinge connecting piece and the rotating arm are fixed.

[0006] According to a further solution of the present invention, limit blocks cooperating with the hinge connecting piece are provided on both sides of the joint surface between the rotating arm and the hinge connecting piece.

[0007] According to a further solution of the present invention, the door leaf fixing plate is provided with a plurality of second kidney grooves which are fixed to the door leaf and used to adjust the front and rear positions of the door leaf, and a second protrusion which increases the locking force is provided on the joint surface between the door leaf fixing plate and the door leaf.

[0008] According to a further solution of the present invention, the door frame fixing plate is provided with a plurality of third waist grooves fixed to the door frame and used to adjust the upper and lower positions of the door leaves, and a third protrusion that increases the locking force is provided on the joint surface between the door frame fixing plate and the door frame.

[0009] After adopting the above structure, the present invention has the following advantages compared with the prior art: First, because the rotating arm is a U-shaped structure, one side of it is hinged to the right-angle connector through a hinge shaft, and the other side is detachably connected to the hinge connecting piece, the door leaf and the door frame can be staggered and installed at different times, thereby solving the problem of the door leaf surface being bumped or scratched during decoration. Second, because the door leaf fixing plate is provided with a second waist groove for adjusting the front and back position of the door leaf, the rotating arm is provided with a first waist groove for adjusting the left and right position of the door leaf, and the door frame fixing plate is provided with a third waist groove for adjusting the up and down position of the door leaf, the front and back position, left and right position, and up and down position of the door leaf are simple and convenient to adjust. Third, because the fourth protrusion and the first protrusion are correspondingly provided on the joint surface where the hinge connecting piece and the rotating arm are fixed, the second protrusion is provided on the joint surface where the door leaf fixing plate and the door leaf are fixed, and the second protrusion is provided on the joint surface where the door leaf fixing plate and the door leaf are fixed, the locking force can be greatly increased, thereby solving the problem of the door leaf sagging after being used for a period of time. Fourthly, since the hinge shaft is not exposed when the door is closed, the possibility of the hinge shaft being damaged by human beings is eliminated, thereby further improving the anti-theft performance of the security door. Fifthly, since the two sides of the rotating arm are equipped with corresponding limit blocks that cooperate with the hinge connecting piece, they not only play a role in limiting the position, but also serve as a guide during installation, making it easier to install the door leaf. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model in the open state.

[0011] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model in the closed state.

[0012] Figure 3 It is a schematic diagram of the three-dimensional structure of the door hinge assembly of the present invention.

[0013] Figure 4 This is a schematic diagram of the main structure of the door leaf fixing plate of the present invention.

[0014] Figure 5 It is a schematic diagram of the three-dimensional structure of the rotating arm of the utility model.

[0015] Among them, 1 door hinge assembly, 2 rotating arm, 3 hinge shaft, 4 door frame hinge assembly, 5 fastener, 11 door leaf fixing plate, 12 second kidney groove, 13 positioning groove, 14 second protrusion, 15 hinge connecting piece, 16 fixing hole, 17 fourth protrusion, 21 first kidney groove, 22 limit block, 23 first protrusion, 41 door frame fixing plate, 42 right-angle connector, 43 rotating arm notch, 44 third kidney groove, 45 third protrusion. DETAILED DESCRIPTION

[0016] Figures 1 to 5 As shown, it is a specific implementation scheme of the utility model hidden adjustable hinge, which includes a door hinge assembly 1, a rotating arm 2, and a door frame hinge assembly 4. The door hinge assembly 1 includes a door fixing plate 11 and a hinge connecting piece 15. The door fixing plate 11 is provided with a plurality of positioning grooves 13, and the hinge connecting piece 15 is fixed correspondingly to the positioning grooves 13. The hinge connecting piece 15 is provided with a plurality of fixing holes 16; the door frame hinge assembly 4 includes a door frame fixing plate 41, a right-angle connector 42 connected to the door frame fixing plate 41, and a door frame fixing plate 42. A rotating arm slot 43 cooperating with the rotating arm 2 is provided on the fixed plate 41; the rotating arm 2 is a U-shaped structure, one side of which is hinged to the right-angle connector 42 through the hinge shaft 3, and the other side is provided with a plurality of first kidney slots 21 cooperating with the fixing holes 16 and used to adjust the left and right positions of the door leaf. The fastener 5 passes through the first kidney slots 21 and cooperates with the fixing holes 16 to fix the rotating arm 2 on the hinge connecting piece 15; when the hinge of the rotating door hinge assembly 1 is closed, the rotating arm 2 passes through and is hidden in the rotating arm slot 43 of the door frame fixing plate 41.

[0017] To ensure a secure and reliable connection between the hinge connecting piece 15 and the rotating arm 2, a fourth protrusion 17 and a first protrusion 23 are provided on the joint surface where the hinge connecting piece 15 and the rotating arm 2 are fixed to each other, thereby increasing the locking force. To ensure quick and convenient installation of the door leaf and the door frame, limit blocks 22 that cooperate with the hinge connecting piece 15 are provided on both sides of the joint surface between the rotating arm 2 and the hinge connecting piece 15.

[0018] In order to facilitate the adjustment of the front and rear position of the door leaf, the door leaf fixing plate 11 is provided with a plurality of second kidney grooves 12 fixed to the door leaf and used to adjust the front and rear position of the door leaf. In order to ensure that the door leaf fixing plate 11 and the door leaf are firmly installed, a second protrusion 14 that increases the locking force is provided on the joint surface where the door leaf fixing plate 11 and the door leaf are fixed.

[0019] In order to facilitate the adjustment of the upper and lower positions of the door leaf, the door frame fixing plate 41 is provided with a plurality of third waist grooves 44 fixed to the door frame and used to adjust the upper and lower positions of the door leaf. In order to ensure that the door frame fixing plate 41 and the door frame are firmly installed, a third protrusion 45 that increases the locking force is provided on the joint surface where the door frame fixing plate 41 and the door frame are fixed.

[0020] The above is only one embodiment of the present invention and does not limit the present invention in any form. Simple modifications, equivalent changes or modifications made without departing from the technical solution of the present invention fall within the scope of protection of the present invention.

Claims

1. A concealed adjustable hinge comprising a door leaf hinge assembly (1), a rotating arm (2), and a door frame hinge assembly (4), characterized in that: The door hinge assembly (1) includes a door leaf fixing plate (11) and a hinge connecting piece (15), wherein the door leaf fixing plate (11) is provided with a plurality of positioning grooves (13), the hinge connecting piece (15) is correspondingly fixed on the positioning grooves (13), and the hinge connecting piece (15) is provided with a plurality of fixing holes (16); the door frame hinge assembly (4) includes a door frame fixing plate (41), a right-angle connecting piece (42) connected to the door frame fixing plate (41), and the door frame fixing plate (41) is provided with a rotating arm groove that cooperates with the rotating arm (2). The rotating arm (2) is a U-shaped structure, one side of which is hinged to the right-angle connector (42) through a hinge shaft (3), and the other side is provided with a plurality of first waist grooves (21) that cooperate with the fixing holes (16) and are used to adjust the left and right positions of the door leaf. The fasteners (5) pass through the first waist grooves (21) and cooperate with the fixing holes (16) to fix the rotating arm (2) on the hinge connecting piece (15); when the hinge is rotated and closed, the rotating arm (2) passes through and is hidden in the rotating arm notch (43) of the door frame fixing plate (41).

2. The concealed adjustable hinge according to claim 1, wherein: A fourth protrusion (17) and a first protrusion (23) for increasing the locking force are correspondingly provided on the joint surface where the hinge connecting piece (15) is fixed to the rotating arm (2).

3. The concealed adjustable hinge according to claim 1 or 2, characterized in that: Position limiting blocks (22) that cooperate with the hinge connecting piece (15) are correspondingly provided on both sides of the joint surface between the rotating arm (2) and the hinge connecting piece (15).

4. The concealed adjustable hinge according to claim 1, wherein: The door leaf fixing plate (11) is provided with a plurality of second waist grooves (12) fixed to the door leaf and used to adjust the front and rear positions of the door leaf, and a second protrusion (14) for increasing the locking force is provided on the joint surface where the door leaf fixing plate (11) is fixed to the door leaf.

5. The concealed adjustable hinge according to claim 1, wherein: The door frame fixing plate (41) is provided with a plurality of third waist grooves (44) fixed to the door frame and used to adjust the upper and lower positions of the door leaf, and a third protrusion (45) for increasing the locking force is provided on the joint surface where the door frame fixing plate (41) is fixed to the door frame.

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