T-shaped door concealed hinge structure

Abstract

The utility model discloses a T type door hidden hinge structure, it includes door frame fixed seat, swing arm subassembly, door leaf sheet board, axle A, axle B, plane support A and plane support B. Swing arm subassembly includes swing arm and positioning device, and swing arm is equipped with the biaxial hole swing arm of axle hole A and axle hole B, positioning device includes device body, compression spring B and locating steel ball, and device body is welded or riveted or screw joint with swing arm, axle A is through door frame fixed seat axle hole C and swing arm's axle hole A and swing arm's axle hole A rotation cooperation connection, and at least one end of axle A two ends is fixed with door frame fixed seat with flat head screw or nut, and swing arm's axle hole B end is through axle B and door leaf sheet board's axle hole D rotation cooperation connection, and axle B two ends are welded with door leaf sheet board's axle hole D, and plane support A and plane support B are arranged respectively in swing arm axle hole A and door frame fixed seat's hole C abutting surface and swing arm's axle hole B and door leaf sheet board's axle hole D abutting surface, and positioning device makes the hinge have the door suction function with the positioning.

Description

Technical Field

[0001] This utility model relates to a T-shaped concealed hinge structure for doors, belonging to the category of hardware products. Background Technology

[0002] Hinges are a crucial component of door products. Existing concealed swivel hinges used in security doors are generally single-axis hinges with the pivot point inside the door frame; these are commonly referred to as swivel hinges. Swivel hinges are connected and fixed to the door frame via a hinge box using welding. This method is cumbersome to install and adjust, and the door opening angle is limited, typically reaching only about 120 degrees. Therefore, developing a swivel hinge that is easy to assemble, adjust, and install, allows for screw mounting to the door frame, is detachable, and enables a door opening angle of up to 180 degrees is a necessity in the current security door market. Summary of the Invention

[0003] Based on the above-mentioned product defects and requirements, the technical problem to be solved by this utility model is to provide a double-axis hole swivel arm concealed hinge structure that enables the door leaf to open at an angle of 180 degrees.

[0004] The following is the technical solution adopted by this utility model:

[0005] A T-shaped concealed hinge structure for a door includes at least a door frame mounting base, a swing arm assembly, a door leaf panel, shaft A, shaft B, a planar support A, and a planar support B. The swing arm assembly includes a swing arm or swing arm a and a positioning device. The swing arm is a double-hole swing arm with shaft holes A and B. The positioning device includes a device body, a compression spring B, and a positioning steel ball. The device body is welded, riveted, or screwed to the swing arm. Shaft A passes through the shaft hole C of the door frame mounting base and the shaft hole A of the swing arm, and is rotatably connected to the shaft hole A of the swing arm. At least one end of shaft A is fixed to the door frame mounting base with a flat-head screw or nut. The shaft hole B end of the swing arm is rotatably connected to the shaft hole D of the door leaf panel through shaft B. Both ends of shaft B are welded / screwed to the shaft hole D of the door leaf panel, or shaft B is movably connected to the shaft hole B of the swing arm and the shaft hole D of the door leaf panel. The shaft hole D of the door leaf panel... The hinge has a cap structure at both ends to prevent shaft B from falling off. Planar support A and plane support B are respectively located on the contact surface between the pivot hole A and the hole C of the door frame fixing seat, and on the contact surface between the pivot hole B of the pivot arm and the pivot hole D of the door leaf plate. At least one end of the upper and lower support surfaces of the door frame fixing seat is provided with positioning holes A and B, or positioning hole B and an arc-shaped clearance guide groove, for positioning of the positioning steel ball of the positioning device. When the pivot arm assembly rotates until the positioning steel ball of the positioning device enters the positioning hole B, the positioning device enables the hinge to have a door-catching function with positioning. In addition, the positioning device restricts the rotation of the door leaf plate around shaft A, requiring the door leaf plate to first rotate around shaft B to overcome the locking force of the positioning device before rotating around shaft A.

[0006] The rotating arm is formed by sequentially connecting the end of the rotating arm's shaft hole B with a rolled surface B at the end of the rolled shaft hole A, an extended edge B of the rolled surface B, a bend angle A, a folded edge A, a bend angle B, a folded edge B, a bend angle C, a folded edge C, a bend angle D, a folded edge D, a bend angle E, and a folded edge E to the end of the rotating arm's shaft hole B, forming spatial slots A and B. Alternatively, the rotating arm a is formed by sequentially connecting the end of the rotating arm's shaft hole B with a rolled surface B at the end of the rolled shaft hole A, an extended edge B of the rolled surface B, a bend angle F, an arc surface A, an inner bend angle, an arc surface B, a bend angle G, a folded edge D, a bend angle E, and a folded edge E to the end of the rotating arm's shaft hole B, forming spatial slots A and B. The positioning device is located outside or inside the extended edge B of the rolled surface B.

[0007] The planar support A and planar support B are planar bearing structures with bushings and planar washers, or planar bearing structures with copper washers sandwiched between two planar washers, or steel ball planar bearings, or planar washers.

[0008] The door leaf panel includes a connecting part with a rolled shaft hole D, a rolled extension edge B, a bending angle H, a fixing part with a mounting plate, and a limiting pin or a limiting strip B. The fixing part with a mounting plate is provided with at least one set of longitudinal or transverse elongated mounting holes A or circular mounting holes A.

[0009] Furthermore: the precision-cast rotating arm b is designed as an integral part of the rotating arm and the positioning device, and the precision-cast rotating arm b includes a device body, positioning steel balls, compression spring A and pressure adjusting screw B.

[0010] Furthermore: the door frame fixing seat is an ear-type door frame fixing seat or a box-type door frame fixing seat a; the ear-type door frame fixing seat is symmetrically designed with mounting ear plates, support surfaces, and limiting stops A, the limiting stops A being welded to the support surfaces or formed by folding from the support surfaces; the mounting ear plates are provided with at least one set of transverse or longitudinal elongated mounting holes B or circular mounting holes B; the upper and lower support surfaces are provided with door frame fixing seat shaft holes C, and at least one end of the upper and lower support surfaces is provided with positioning holes A and B, or positioning holes B and arc-shaped clearance guide grooves, for positioning of positioning steel balls of positioning devices. The arc-shaped clearance guide grooves are provided to ensure smooth opening and closing of the hinge when the hinge first rotates around the shaft A.

[0011] Furthermore: the door frame fixing seat a of the box structure is a hinge box with three sides formed. Its upper and lower support surfaces are provided with door frame fixing seat shaft holes C. At least one end of the upper and lower support surfaces is provided with positioning holes A and B for positioning steel balls of positioning devices, or positioning hole B and arc-shaped clearance guide groove.

[0012] Furthermore: the door frame fixing seat and the door leaf plate are provided with decorative cover plate A and decorative cover plate B on their fixing mounting plates.

[0013] In summary, when the door hinge plate rotates to a certain position around shaft B, the limiting stop pin abuts against the limiting groove surface or the limiting stop strip abuts against the inner side of the extended surface of the rolling shaft hole B on the rolled surface of the double-axis hole rotating arm, driving the double-axis hole rotating arm assembly to rotate. The double-axis hole rotating arm assembly continues to rotate around shaft A. The positioning steel ball of the positioning device of the double-axis hole rotating arm assembly moves from the positioning hole A on the rotating arm fixed seat to the positioning hole B for positioning, and restricts the double-axis hole rotating arm assembly from continuing to rotate, increasing the opening angle of the door leaf plate, and even allowing the door leaf plate to open to 180 degrees. At the same time, the hinge positioning device acts as a door catch. Conversely, when the door leaf plate returns to its original position, the door leaf plate first rotates to a certain angle position, the door leaf plate abuts against the double-axis hole rotating arm, and the positioning steel ball on the positioning device of the double-axis hole rotating arm assembly disengages from the positioning hole B and returns to the positioning hole A for positioning, so that the door leaf plate resets and the door returns to the closed state. In addition, if a double-axis hole swivel arm hinge with an ear-type door frame fixing seat structure is used, the double-axis hole swivel arm hinge can be installed, adjusted and removed from the inside of the door frame. The hinge can achieve position adjustment in at least two directions: the door leaf and the door frame.

[0014] Compared with existing multi-axis concealed hinges, this invention has the following advantages:

[0015] (1) The hinge openings of the door frame and door leaf are small, the hinge load-bearing capacity is strong, the hinge installation and adjustment are convenient, and it is detachable.

[0016] (2) The hinge opens in two sections with a large opening angle, capable of opening 180 degrees; the hinge has a door catch positioning function.

[0017] (3) The hinge can adjust the position of the door leaf and the door frame in at least two directions.

[0018] (4) The hinge is equipped with a decorative cover plate, which is beautiful and cost-effective. Attached Figure Description

[0019] Figure 1 This is a three-dimensional illustration of the concealed hinge of this utility model.

[0020] Figure 2 A diagram illustrating the axial structure when the hinge is at its maximum open angle.

[0021] Figure 3 This is an exploded perspective view (I) illustrating the concealed hinge structure of this utility model.

[0022] Figure 4 This is an exploded perspective view (II) illustrating the concealed hinge structure of this utility model.

[0023] Figure 5 This is a diagram illustrating the technical features of the swing arm structure.

[0024] Figure 6 This is a diagram illustrating the technical features of the rotating arm a structure.

[0025] Figure 7 This is a diagram illustrating the structural technical features of the precision-cast rotary arm b.

[0026] Figure 8 This is a diagram illustrating the technical features of the precision-cast rotary arm b in the K direction.

[0027] Figure 9 Figure 1 illustrates the technical features of the concealed hinge ear structure door frame fixing seat of this utility model.

[0028] Figure 10 Figure (II) illustrates the technical features of the concealed hinge ear structure door frame fixing seat of this utility model.

[0029] Figure 11 This is a technical feature illustration of the door frame fixing seat a with a concealed hinge box structure according to this utility model.

[0030] Figure 12 This diagram illustrates the technical features of the concealed hinge decorative cover and door leaf panel of this utility model. Detailed Implementation

[0031] See attached document Figures 1-12 The present invention will be further described in conjunction with the embodiments:

[0032] A T-shaped concealed hinge structure for a door includes at least a door frame mounting base 1, a swing arm assembly 2, a door leaf panel 3, a shaft A4, a shaft B5, a planar support A6, and a planar support B7. The swing arm assembly 2 includes a swing arm 21 or a swing arm a and a positioning device 22. The swing arm 21 is a double-axis-hole swing arm with shaft holes A211 and B230. The positioning device 22 includes a device body 23, a compression spring B25, and a positioning steel ball 24. The device body 23 is welded, riveted, or screwed to the swing arm 21. Shaft A4 passes through the shaft hole C11 of the door frame mounting base and the shaft hole A211 of the swing arm 21, and is rotatably connected to the shaft hole A211 of the swing arm 21. At least one end of shaft A4 is fixed to the door frame mounting base 1 with a flat-head screw 8 or a nut. The shaft hole B230 end of the swing arm 21 is rotatably connected to the shaft hole D31 of the door leaf panel 3 via shaft B5. Both ends of shaft B5 are connected to the door leaf panel. The shaft hole D31 of the door leaf plate 3 is welded / screwed and fixed, or the shaft B5 is movably connected to the shaft hole B230 of the rotating arm 21 and the shaft hole D31 of the door leaf plate 3. The shaft hole D31 of the door leaf plate 3 is press-fitted with cap structures at both ends to prevent the shaft B5 from falling off. The flat support A6 and flat support B7 are respectively provided on the abutting surface of the rotating arm shaft hole A211 and the hole C11 of the door frame fixing seat 1 and the abutting surface of the rotating arm shaft hole B230 and the shaft hole D31 of the door leaf plate 3. The upper and lower end support surfaces 18 of the door frame fixing seat 1 are provided with positioning holes A12 and B13 or positioning holes B13 and arc-shaped clearance guide grooves 14 for positioning steel balls 24 of the positioning device 22. The rotating arm assembly 2 rotates to the positioning device 22. The positioning steel ball 24 enters the positioning hole B13, and the positioning device 22 enables the hinge to have a door-catching function with positioning; in addition, the positioning device 22 restricts the rotation of the door leaf plate around the axis A4, and the door leaf plate first rotates around the axis B5 to overcome the locking force of the positioning device 22 before rotating around the axis A4.

[0033] The rotating arm 21 is formed by sequentially connecting the end of the rolled shaft hole A211 to the end of the shaft hole B230, forming spatial slots A231 and B232, or the rotating arm a21a, which is formed by the rolled surface B212 at the end of the rolled shaft hole A211, the extended edge B213 of the rolled surface B212, the bending angle A214, the folded edge A215, the bending angle B216, the folded edge B217, the bending angle C218, the folded edge C219, the bending angle D220, the folded edge D221, the bending angle E222, and the folded edge E223. The circular surface B212, the extended edge B213 of the rolled circular surface B212, the bending angle F (224), the arc surface A225, the inner bending angle 226, the arc surface B227, the bending angle G228, the folded edge D221, the bending angle E222, and the folded edge E223 connect the shaft hole B230 end of the rotating arm 21 to form a spatial slot A231 and a spatial slot B232; the positioning device 22 is located on the outside or inside of the extended edge B213 of the rolled circular surface B212 and the extended edge B213 has technical features, but is not limited to these technical features.

[0034] The planar support A6 and planar support B7 are planar bearing structures with bushings and planar washers, or planar bearing structures with copper washers sandwiched between two planar washers, or steel ball planar bearings, or planar washers, etc. Preferably, they are planar bearing structures with bushings and planar washers.

[0035] Preferably, the door leaf plate 3 includes a connecting part rolled shaft hole D31, a rolled extension edge B32, a bending angle H33, a fixing part mounting plate 34, and a limiting pin or limiting strip B35. The fixing part mounting plate 34 is provided with at least one set of longitudinal or transverse elongated mounting holes A or circular mounting holes A36.

[0036] Preferably, the precision-cast rotating arm b21b is designed as an integral part of the rotating arm 21 and the positioning device 22. The precision-cast rotating arm b21b includes a device body 23, a positioning steel ball 24, a compression spring A, and a pressure adjusting screw B26.

[0037] Preferably, the door frame fixing seat 1 is an ear-type door frame fixing seat 1 or a box-type door frame fixing seat a1a; the ear-type door frame fixing seat 1 is symmetrically designed with mounting ear plates 15, support surfaces 18, and limiting stops A17, the limiting stops A17 being welded to the support surfaces 18 or formed by folding from the support surfaces 18; the mounting ear plates 15 are provided with at least one set of transverse or longitudinal elongated mounting holes B or circular mounting holes B16; the upper and lower support surfaces 18 are provided with door frame fixing seat shaft holes C11, and at least one end of the upper and lower support surfaces 18 is provided with positioning holes A12 and B13 or positioning holes B13 and arc-shaped clearance guide grooves 14 for positioning of positioning steel balls 24 of positioning devices 22.

[0038] The door frame fixing seat 1 can be a box-type door frame fixing seat a1a. The box-type door frame fixing seat a1a is a hinge box with three sides. Its upper and lower support surfaces 18 are provided with door frame fixing seat shaft holes C11. At least one end of the upper and lower support surfaces 18 is provided with positioning holes A12 and B13 or positioning holes B13 and arc-shaped clearance guide grooves 14 for positioning of positioning steel balls 24 of positioning device 22.

[0039] Preferably, the door frame fixing seat 1 and the door leaf plate 3 are provided with decorative cover plate A9 and decorative cover plate B10 on their fixing parts mounting plates.

[0040] Finally, it should be noted that the above-listed embodiments are merely preferred embodiments of this utility model. Obviously, it is not limited to the above embodiments, and many variations are possible. All structural, principle, and shape variations (specifically referring to the shape of the swing arm, door frame fixing seat, and door leaf panel) that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A T-shaped concealed hinge structure for a door, comprising at least a door frame fixing seat (1), a swing arm assembly (2), a door leaf plate (3), shaft A (4), shaft B (5), a planar support A (6), and a planar support B (7), characterized in that: The rotating arm assembly (2) includes a rotating arm (21) or a rotating arm a and a positioning device (22). The rotating arm (21) is a double-shaft-hole rotating arm with shaft hole A (211) and shaft hole B (230). The positioning device (22) includes a device body (23), a compression spring B (25), and a positioning steel ball (24). The device body (23) is welded, riveted, or screwed to the rotating arm (21). The rotating arm (21) and the positioning device (22) are designed as a single unit. The precision-cast rotating arm b (21b) includes a device body (23), positioning steel balls (24), compression spring A, and pressure adjusting screw B (26); shaft A (4) passes through the shaft hole C (11) of the door frame fixing seat and the shaft hole A (211) of the rotating arm (21) and is rotatably connected to the shaft hole A (211) of the rotating arm (21); at least one end of shaft A (4) is fixed to the door frame fixing seat (1) with a flat-head screw (8) or nut; the shaft hole B (211) of the rotating arm (21) is rotatably connected to the shaft hole A (211) of the rotating arm (21); at least one end of shaft A (4) is fixed to the door frame fixing seat (1) with a flat-head screw (8) or nut; the shaft hole B (211) of the rotating arm (21) is rotatably connected to the shaft hole A (211) of the rotating arm (21). 30) The end is rotatably connected to the shaft hole D (31) of the door leaf plate (3) through shaft B (5). The two ends of shaft B (5) are welded / fixed or connected to the shaft hole D (31) of the door leaf plate (3). Shaft B (5) is movably connected to the shaft hole B (230) of the rotating arm (21) and the shaft hole D (31) of the door leaf plate (3). The two ends of the shaft hole D (31) of the door leaf plate (3) are press-fitted with cap head structure; the flat support A (6) and the flat support B (7) are divided into The rotating arm shaft hole A (211) and the door frame fixing seat (1) abut against each other, and the rotating arm (21) shaft hole B (230) and the door leaf plate (3) shaft hole D (31) abut against each other; the upper and lower end support surfaces (18) of the door frame fixing seat (1) are provided with positioning holes A (12) and B (13) for positioning of positioning steel balls (24) of positioning device (22) at least one end, and the rotating arm assembly (2) rotates to the positioning device (22). The positioning steel ball (24) enters the positioning hole B (13), and the positioning device (22) enables the hinge to have the function of a door suction with positioning; the positioning device (22) restricts the door leaf plate from rotating around the shaft A (4), and the limiting stop bar B (35) abuts against the inner side of the extension surface of the shaft hole B (230), driving the double shaft hole rotating arm assembly (2) to rotate. The door leaf plate first rotates around the shaft B (5) to overcome the locking force of the positioning device (22) and then rotates around the shaft A (4).

2. The concealed hinge structure for a T-shaped door according to claim 1, characterized in that: The rotating arm (21) is formed by sequentially connecting the rolled surface B (212) at the end of the rolled shaft hole A (211), the extended edge B (213) of the rolled surface B (212), the bending angle A (214), the folded edge A (215), the bending angle B (216), the folded edge B (217), the bending angle C (218), the folded edge C (219), the bending angle D (220), the folded edge D (221), the bending angle E (222), and the folded edge E (223) to the end of the shaft hole B (230) of the rotating arm (21), forming a spatial slot A (231) and a spatial slot B (232), or a rotating arm a (21a), which ... folded edge B (216), the folded edge B (217), the folded edge B (218), the The end of the shaft hole A (211) is rolled surface B (212), the extension edge B (213) of the rolled surface B (212), the bending angle F (224), the arc surface A (225), the inner bending angle (226), the arc surface B (227), the bending angle G (228), the folded edge D (221), the bending angle E (222), and the folded edge E (223) are connected to the end of the shaft hole B (230) of the rotating arm (21) to form a spatial slot A (231) and a spatial slot B (232); the positioning device (22) is located outside or inside the extension edge B (213) of the rolled surface B (212) and the extension edge B (213).

3. The concealed hinge structure for a T-shaped door according to claim 1, characterized in that: The planar support A (6) and planar support B (7) are planar bearing structures with bushings and planar washers, or planar bearing structures with copper washers sandwiched between two planar washers, or steel ball planar bearings, or planar washers.

4. The concealed hinge structure for a T-shaped door according to claim 1, characterized in that: The door leaf panel (3) includes a connecting part rolled shaft hole D (31), a rolled extension edge B (32), a bending angle H (33), a fixing part mounting plate (34), and a limiting pin or limiting strip B (35). The fixing part mounting plate (34) is provided with at least one set of longitudinal or transverse elongated mounting holes A or circular mounting holes A (36).

5. A concealed hinge structure for a T-shaped door according to any one of claims 1 to 4, characterized in that: The door frame fixing seat (1) is an ear-type door frame fixing seat (1) or a box-type door frame fixing seat a (1a); the ear-type door frame fixing seat (1) is symmetrically designed with mounting ear plate (15), support surface (18), and limiting stop bar A (17), the limiting stop bar A (17) is welded to the support surface (18) or formed by folding from the support surface (18); the mounting ear plate (15) is provided with at least one set of transverse or longitudinal elongated mounting holes B or circular mounting holes B (16); its upper and lower support surfaces (18) are provided with door frame fixing seat shaft holes C (11), and at least one end of the upper and lower support surfaces (18) is provided with positioning holes A (12) and B (13) or positioning holes B (13) and arc-shaped clearance guide groove (14) for positioning of positioning steel balls (24) of positioning device (22).

6. The concealed hinge structure for a T-shaped door according to claim 5, characterized in that: The door frame fixing seat a (1a) of the box structure is a hinge box with three sides. At least its upper and lower support surfaces (18) are provided with door frame fixing seat shaft holes C (11). At least one end of the upper and lower support surfaces (18) is provided with positioning holes A (12) and B (13) or positioning holes B (13) and arc-shaped clearance guide grooves (14) for positioning of positioning steel balls (24) of positioning device (22).

7. A concealed hinge structure for a T-shaped door according to any one of claims 1 to 4, characterized in that: The door frame fixing seat (1) and the door leaf plate (3) are provided with decorative cover plate A (9) and decorative cover plate B (10) on their fixing parts mounting plates.

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