Reinforced concealed door hinge

Abstract

This utility model discloses a reinforced concealed door hinge, including a base and a hinge. One end of the hinge has a snap-fit ​​portion, and the other end away from the snap-fit ​​portion has a connecting portion. The connecting portion has a pivot hole. The snap-fit ​​portion is embedded in the aluminum profile slot of the door body. The base has a hinge receiving cavity, and the hinge is received in the hinge receiving cavity. It also includes a profile fixing plate. The profile fixing plate has protruding ridges on the side facing the hinge near its two sides. At least three threaded holes are arranged side by side in the middle of the profile fixing plate. A raised ring is provided on the profile fixing plate at the edge of the threaded holes. The thread of the threaded hole extends to the raised ring and passes through it. The base extends symmetrically along the pivot axis to form an installation portion. The installation portion has screw holes that correspond one-to-one with the threaded holes. The screw passes through the screw holes and is threaded onto the profile fixing plate. By improving the structure of the profile fixing plate, the profile fixing plate has higher connection strength and self-strength.

Description

Technical Field

[0001] This utility model belongs to the field of door hinge technology, specifically relating to a reinforced concealed door hinge. Background Technology

[0002] There are many types of concealed hinges on the market, used in common hinged doors such as wooden doors, iron-framed doors, aluminum-framed doors, and glass doors. Traditional concealed hinges are difficult to perfectly conceal during use, and their position adjustment and fixation are inconvenient during door installation. To address this, our company has developed a concealed door hinge (application number 202323017658.7), which includes a base, a hinge, a locking part at one end of the hinge, and a connecting part at the other end away from the locking part. The connecting part has a pivot hole, and the locking part is embedded in a slot in the aluminum profile of the door body. The base has a hinge receiving cavity into which the hinge is received. It also includes two adjusting blocks, with the hinge located between the two adjusting blocks. A pivot is inserted into the pivot hole, and both ends of the pivot are inserted into positioning holes on the two adjusting blocks. The two adjusting blocks are connected to the base and can slide in a direction perpendicular to the pivot. When the adjusting blocks are slid, the distance between the locking part and the base can be changed. It also includes a fixing block and a top block. The aluminum alloy fixing block and top block are respectively fixed on the aluminum profile of the door body. The snap-fit ​​part is embedded in the snap-fit ​​groove. The top block is located below the snap-fit ​​part and contacts the lower end face of the snap-fit ​​part. The fixing block is provided with a first adjusting bolt along the direction of the snap-fit ​​groove. Rotating the first adjusting bolt makes its end press against the upper end of the snap-fit ​​part. The hinge is received in the hinge receiving groove provided on the base, thereby concealing the hinge. The adjusting block is provided to adjust the position of the hinge, thereby facilitating the adjustment of the gap between the door and the door frame. The fixing block and top block are provided to facilitate the adjustment of the height of the door, and also to facilitate the connection of the snap-fit ​​part to the door, reducing the requirements for the accuracy of the installation position and reducing the installation difficulty. While this design solved the aforementioned problems, in actual use, it was discovered that the hidden door hinge lacked sufficient strength. Specifically, the mounting portion 104 extends symmetrically from the base 1 in a direction parallel to the pivot 3. A profile fixing plate 6 is connected to the mounting portion 104 via screws 12. The profile fixing plate 6 is embedded in the profile groove of the door frame, and is further locked and limited within the profile groove of the door frame by a set screw 10, thus fixing the base. Because the profile fixing plate 6 is made of aluminum alloy and has few connection points with the mounting portion 104 of the base, in heavy door applications, the profile fixing plate 6 often deforms or even slips off its connecting threads, leading to problems such as difficulty in rotating the door, difficulty in closing, or even damage. Summary of the Invention

[0003] The purpose of this invention is to provide a reinforced concealed door hinge, which aims to solve the problem that traditional hinges are exposed to the outside and cannot be well concealed.

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows: A reinforced concealed door hinge includes a base and a hinge. One end of the hinge has a snap-fit ​​portion, and the other end away from the snap-fit ​​portion has a connecting portion. The connecting portion has a pivot hole. The snap-fit ​​portion is embedded in an aluminum profile slot of the door body. The base has a hinge receiving cavity, and the hinge is received in the hinge receiving cavity. The hinge also includes a profile fixing plate. The profile fixing plate has protruding ridges on its side facing the hinge, near its two sides. At least three threaded holes are arranged side-by-side in the middle of the profile fixing plate. A raised ring is provided on the profile fixing plate at the edge of the threaded holes, and the thread of the threaded hole extends towards and through the raised ring. The base extends symmetrically along the pivot axis to form mounting portions. The mounting portions have screw holes corresponding to the threaded holes, and screws pass through the screw holes and are threaded onto the profile fixing plate.

[0005] Based on the above scheme and as a preferred embodiment of the above scheme: a notch is provided in the middle of the convex ridge.

[0006] Based on the above scheme and as a preferred embodiment of the above scheme: the profile fixing plate is made of stainless steel.

[0007] Based on the above scheme and as a preferred embodiment of the above scheme: the profile fixing plate is made of steel.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: the rotating shaft is provided with a sleeve.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: the sleeve is made of plastic.

[0010] Based on the above scheme and as a preferred embodiment of the above scheme: the rotating shaft is not rotatable relative to the adjusting block.

[0011] Based on the above scheme and as a preferred embodiment of the above scheme: the hinge has a hook-shaped structure.

[0012] Based on the above solution and as a preferred solution: the base is provided with an adjustment block groove, the adjustment block is partially embedded in the adjustment block groove, and the second adjustment bolt passes through the base from the side where the snap-fit ​​part is located and is screwed into the adjustment block.

[0013] Based on the above scheme and as a preferred embodiment of the above scheme: a limiting component is provided on the side of the adjusting block away from the second adjusting bolt, and the limiting component restricts the adjusting block from sliding out of the adjusting block groove.

[0014] Based on the above solution and as a preferred solution: the base extends symmetrically into a mounting part in a direction parallel to the rotating shaft, and a profile fixing plate is connected to the mounting part, the profile fixing plate being embedded in the profile groove of the door frame.

[0015] The significant and beneficial technical effects of this invention compared to existing technologies are as follows: By structurally improving the profile fixing plate, it achieves higher connection strength. Specifically, the addition of protruding ridges on both sides of the fixing plate enhances its strength, effectively resisting deformation and resulting in better stability when connecting hinges and door panels, reducing the likelihood of deformation. Furthermore, the presence of a raised ring outside the threaded hole significantly increases its effective depth compared to existing threaded holes in profile fixing plates. This leads to superior bolt connection reliability, the ability to withstand greater tensile forces, and a reduced risk of thread breakage and bolt slippage. Attached Figure Description

[0016] Figure 1 This is an exploded view of the overall structure of this utility model; Figure 2 This is a top view of the overall structure of this utility model; Figure 3 This is a rear view of the overall structure of this utility model; Figure 4 This is a three-dimensional schematic diagram of the overall structure of this utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the given embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] In the description of this application, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0019] In the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0020] Combination Figure 1-4As shown, this application discloses a reinforced concealed door hinge, including a base 1 and a hinge 15. Preferably, the hinge 15 has a hook-shaped structure. One end of the hinge 15 has a locking part 151, and the other end away from the locking part 151 has a connecting part 152. The connecting part 152 has a pivot hole 1521. The locking part 151 is embedded in the aluminum profile slot of the door body. The base 1 is provided with a hinge receiving cavity 101, and the hinge 15 is received in the hinge receiving cavity 101. Thus, when the hinge 15 rotates back into the hinge receiving cavity 101, the hinge 15 can be concealed. It also includes two adjusting blocks 2, and the hinge 1 5 is located between two adjusting blocks 2, with a rotating shaft 3 inserted into the rotating shaft hole 1521, and both ends of the rotating shaft 3 inserted into the positioning holes 202 opened on the two adjusting blocks 2 respectively. Specifically, since the base and hinge are made of aluminum alloy, its wear resistance is poor. In order to avoid excessive wear during use and cause large gaps in the hinge, this embodiment preferably has a sleeve 4 on the rotating shaft hole 3 and the rotating shaft 3, and the sleeve 4 is made of plastic, such as nylon. This can reduce wear while ensuring smooth rotation. When the sleeve wears out later, it can be directly replaced, resulting in low maintenance costs. In addition, notches are provided at both ends 31 of the rotating shaft 3, for example, to form an anti-rotation structure with a D-shaped or waist-shaped cross section. At the same time, the adjusting blocks 2 are provided with corresponding mounting holes, so that the rotating shaft 3 cannot rotate relative to the adjusting blocks 2, thereby avoiding wear between the rotating shaft 3 and the adjusting blocks 2, extending the service life of the entire hinge, and avoiding the problem of door instability and excessive shaking caused by wear. Two adjusting blocks 2 are connected to the base 1 and can slide in a direction perpendicular to the rotating shaft 3. When the adjusting blocks 2 are slid, the distance between the locking part 151 and the base 1 can be changed. Specifically, the base 1 has an adjusting block groove 102, and the adjusting block 2 is partially embedded in the adjusting block groove 102. The second adjusting bolt 5 passes through the base 1 from the side where the locking part 151 is located and is screwed into the adjusting block 2. Since the second adjusting bolt 5 and the adjusting block 2 are both threaded, the head of the second adjusting bolt 5 is restricted by the limiting structure at the bolt hole 103 on the base 1, so that it can only rotate and cannot move axially. When the second adjusting bolt 5 is rotated, the thread can make the adjusting block 2 slide along the adjusting block groove 102, thereby driving the hinge 15 to change its relative position, thereby realizing the adjustment of the gap between the door and the door frame. It should be noted that since the head diameter of the second adjusting bolt 5 is larger than the threaded section diameter, the limiting structure here limits the two ends of the head of the second adjusting bolt 5 by setting a groove on the inner wall of the bolt hole 103, thereby allowing it to rotate flexibly while restricting its axial movement.

[0021] Furthermore, in order to facilitate the installation of the adjusting block 2, one end of the adjusting block groove 102 needs to be open. However, after it is open, the adjusting block 2 may come out of the adjusting block groove 102 during the adjustment process. Therefore, in this embodiment, a limiting component is preferably provided on the side of the adjusting block 2 away from the second adjusting bolt 5. The limiting component restricts the adjusting block 2 from sliding out of the adjusting block groove 102. Specifically, the limiting component is a screw. The screw is screwed into the base near the opening of the adjusting block groove, and the screw head is used to limit it.

[0022] In addition, to facilitate the adjustment of the door height and the connection and fixation between the door and the snap-fit ​​part, this embodiment also includes a fixing block 7 and a top block 8. The aluminum alloy fixing block 7 and the top block 8 are fixedly installed on the aluminum profile of the door by screws. The snap-fit ​​part 151 is embedded in the slot. The top block 8 is located below the snap-fit ​​part 151 and contacts the lower end face of the snap-fit ​​part 151. The fixing block 7 is provided with a first adjusting bolt 9 along the direction of the slot. Rotating the first adjusting bolt 9 will press its end against the upper end of the snap-fit ​​part 151.

[0023] Of course, in order to realize the installation of the base 1 and the door frame, the base 1 in this embodiment extends symmetrically along the axis of the rotating shaft 3 to form an installation part 104. The installation part 104 is provided with screw holes that correspond one-to-one with the threaded holes 64. The screw 13 passes through the screw hole and is threaded to the profile fixing plate 6. The profile fixing plate 6 is embedded in the profile slide groove of the door frame, and with the help of the set screw 10, the profile fixing plate 6 is further locked and limited in the profile slide groove of the door frame, so as to realize the installation and fixation of the base. In this embodiment, the profile fixing plate 6 has protruding ribs 61 near its two sides on the side facing the hinge 15, and a notch 62 is provided in the middle of the protruding ribs 61. When the screw 13 passes through the screw hole and is threaded onto the profile fixing plate 6 and tightened, the protruding ribs 61 press against the inner wall of the profile groove of the door frame. However, since the notch 62 is not in contact with the inner wall of the profile groove of the door frame, a reverse bow-shaped deformation will occur on the inner wall of the profile groove of the door frame near the notch 62. Therefore, the notch 62 makes it difficult for the door leaf to be heavy, thus causing the hinge to pull the profile... When the profile fixing plate 6 tends to slide down within the profile groove of the door frame, the outer corner of the protruding rib 61 at the notch 60 will contact the reverse-bow-shaped deformed arched part, thereby effectively preventing the profile fixing plate 6 from sliding down. At least three threaded holes 64 are arranged side-by-side in the middle of the profile fixing plate 6. A protruding ring 63 is provided on the profile fixing plate 6 at the edge of the threaded holes 64, and the threads of the threaded holes 64 extend towards and through the protruding ring 63. The profile fixing plate 63 is made of steel, preferably stainless steel, such as 304 stainless steel. Stainless steel has higher strength than aluminum alloy and is less prone to rusting. By improving the structure of the profile fixing plate, it achieves higher connection strength. In particular, the protruding ribs on both sides of the profile fixing plate enhance its strength, effectively resisting deformation and providing better stability after connecting the hinges and door leaf, reducing the likelihood of deformation. By setting a raised ring outside the threaded hole, the effective depth of the threaded hole is significantly increased compared to the threaded hole of the profile fixing plate in the prior art. This results in better reliability of the bolt connection, greater tensile strength, and reduces the likelihood of thread damage and bolt slippage.

[0024] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A reinforced concealed door hinge, comprising a base (1) and a hinge (15), wherein one end of the hinge (15) is provided with a snap-fit ​​portion (151), and the other end away from the snap-fit ​​portion (151) is provided with a connecting portion (152), the connecting portion (152) is provided with a pivot hole (1521), the snap-fit ​​portion (151) is embedded in the aluminum profile slot of the door body, the base (1) is provided with a hinge receiving cavity (101), and the hinge (15) is received in the hinge receiving cavity (101); characterized in that: It also includes a profile fixing plate (6), on which a protruding ridge (61) is provided near its two sides on the side facing the hinge (15). At least three threaded holes (64) are arranged side by side in the middle of the profile fixing plate (6). A protruding ring (63) is provided on the profile fixing plate (6) at the edge of the threaded hole (64). The thread of the threaded hole (64) extends to and passes through the protruding ring (63). The base (1) extends symmetrically along the axis of the rotating shaft (3) to form a mounting part (104). The mounting part (104) is provided with screw holes that correspond one-to-one with the threaded holes (64). The screw passes through the screw hole and is threaded onto the profile fixing plate (6).

2. The reinforced concealed door hinge according to claim 1, characterized in that: A notch (62) is provided in the middle of the protruding ridge (61).

3. The reinforced concealed door hinge according to claim 1, characterized in that: The profile fixing plate (6) is made of steel.

4. The reinforced concealed door hinge according to claim 1, characterized in that: The profile fixing plate (6) is made of stainless steel.

5. The reinforced concealed door hinge according to claim 1, characterized in that: The hinge (15) has a hook-shaped structure.

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