Invisible inward-opening anti-theft door with flush frame and sash

Abstract

The hidden inward-opening anti-theft door comprises a door frame and a door leaf, the periphery of the inner side of the door frame is provided with stepped grooves which are reduced from back to front in a stepped mode, and the stepped grooves comprise a first groove located on the rear side of the door frame and a second groove located on the front side of the door frame; a step boss matched with the step groove is arranged on the outer side of the door leaf, and when the door leaf is closed, the front side and the rear side of the door frame are flush with the front side and the rear side of the door leaf respectively; the stepped boss comprises a first boss matched with the first groove, and a hinge is installed on the first boss. The design that the frame and the sash are flush and the hidden hinge is combined is adopted, the anti-theft performance can be improved, the door body is concise and flat, and the overall attractiveness is remarkably enhanced.

Description

Technical Field

[0001] This utility model relates to the field of doors, and in particular to a concealed inward-opening security door with a flush frame and sash. Background Technology

[0002] In the current field of inward-opening security door technology, there is a common problem of technological fragmentation: although some products have achieved an optimized appearance with flush frames and leaves, or adopted a structural design in which hinges are hidden inside the door leaf, there are very few products on the market that effectively integrate these two technologies and apply them to inward-opening doors; specifically, if the hinge installation scheme is not reasonable when simply using a flush frame and leaf structure, it is easy to cause the door to jam when opening and closing and lack stability; while using only a hinge-hidden design makes it difficult to balance the aesthetics and practicality of a flush frame and leaf. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a concealed inward-opening security door with a flush frame and leaf. The design combines a flush frame and leaf with a concealed hinge, which can not only improve the anti-theft performance, but also make the door simple and flat, and significantly enhance the overall aesthetics.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A concealed inward-opening security door with a flush frame and door leaf includes a door frame and a door leaf. The inner side of the door frame is provided with a stepped groove that decreases in size from back to front. The stepped groove includes a first groove located on the rear side of the door frame and a second groove located on the front side of the door frame. The outer side of the door leaf is provided with a stepped protrusion that matches the stepped groove. When the door leaf is closed, the front and rear sides of the door frame are flush with the front and rear sides of the door leaf, respectively. The stepped protrusion includes a first protrusion that matches the first groove. A hinge is installed on the first protrusion. The hinge includes a first connector and a second connector that are hinged to each other. The first connector and the second connector are fixed to the door frame and the door leaf, respectively, so that the door leaf is rotatably connected to the door frame.

[0006] Furthermore, the first connector includes a C-shaped middle portion, a first connecting portion that bends and extends forward from the front side of the middle portion, and a first pivot portion that extends inward along the circumferential direction from the rear side of the middle portion; the second connector includes a second connecting portion and a second pivot portion that extends along the circumferential direction from the rear side of the second connecting portion and is located on the right side of the second connecting portion.

[0007] Furthermore, both the first pivot portion and the second pivot portion are cylindrical and are hinged to each other via a hinge shaft.

[0008] Furthermore, the first groove and the second groove are connected by a first stepped connecting wall, and the stepped boss also includes a second boss adapted to the second groove. The first boss and the second boss are connected by a second stepped connecting wall. The first pivot part and the second pivot part are both located in the first boss on the right side of the door leaf. The first stepped connecting wall and the second stepped connecting wall are both provided with openings for the middle part to pass through. The front wall of the first boss is provided with an opening for the second connecting part to pass through. The first connecting part is fixedly connected to the inner wall of the first stepped connecting wall by screws, and the second connecting part is fixedly connected to the outer wall of the second stepped connecting wall by screws.

[0009] Furthermore, sealing strips are provided between the first boss and the first groove, and between the second boss and the second groove.

[0010] Furthermore, two pairs of hinges are distributed on the upper and lower parts of one side of the door leaf.

[0011] Furthermore, a door face line is provided on the front side of the door frame, and the door frame and the door face line are integrally formed profiles.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention features a stepped groove that tapers from back to front on the inner side of the door frame, and a stepped protrusion on the outer side of the door leaf that matches the stepped groove. When the door leaf is closed, the front and rear sides of the door frame and the door leaf are completely flush, achieving a tight closure to enhance anti-pry and anti-collision performance, while also creating a simple and flat appearance.

[0014] Furthermore, the hinges are installed inside the first boss, completely hidden within the door structure and invisible from the outside. Compared to traditional exposed hinges, this design further enhances the overall aesthetics of the security door, making the door surface more concise and streamlined. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of a concealed inward-opening security door with a flush frame and sash, according to this utility model.

[0016] Figure 2 This is a cross-sectional view of the concealed inward-opening security door of this utility model.

[0017] Figure 3 This is a partially enlarged cross-sectional view of the concealed inward-opening security door of this utility model.

[0018] Figure 4 This is a partially enlarged cross-sectional view of the concealed inward-opening security door of this utility model.

[0019] Figure 5 This is a longitudinal sectional view of the concealed inward-opening security door of this utility model. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the embodiments shown in the accompanying drawings.

[0021] like Figures 1 to 5 As shown, a concealed inward-opening security door with a flush frame and door leaf includes a door frame 1 and a door leaf 2. The inner side of the door frame 1 is provided with a stepped groove 11 that decreases in size from back to front. The stepped groove 11 includes a first groove 12 located on the rear side of the door frame 1 and a second groove 13 located on the front side of the door frame 1. The outer side of the door leaf 2 is provided with a stepped protrusion 21 that matches the stepped groove 11. When the door leaf 2 is closed, the front and rear sides of the door frame 1 are flush with the front and rear sides of the door leaf 2, respectively. The stepped protrusion 21 includes a first protrusion 22 that matches the first groove 12. A hinge 3 is installed on the first protrusion 22. The hinge 3 includes a first connector 31 and a second connector 32 that are hinged to each other. The first connector 31 and the second connector 32 are fixed to the door frame 1 and the door leaf 2, respectively, so that the door leaf 2 is rotatably connected to the door frame 1.

[0022] As described above, the first connector 31 includes a C-shaped middle portion 311, a first connecting portion 312 that bends and extends forward from the front side of the middle portion 311, and a first pivot portion 313 that extends inward along the circumferential direction from the rear side of the middle portion 311. The first pivot portion 313 is tangentially connected to the middle portion 311. The second connector 32 includes a second connecting portion 321 and a second pivot portion 322 that extends along the circumferential direction from the rear side of the second connecting portion 321 and is located to the right of the second connecting portion 321. The second connecting portion 321 and the second pivot portion 322 are tangentially connected.

[0023] As described above, both the first pivot portion 313 and the second pivot portion 322 are cylindrical and are hinged to each other via a hinge shaft.

[0024] As described above, the first groove 12 and the second groove 13 are connected by a first stepped connecting wall 14. The stepped boss 21 also includes a second boss 23 adapted to the second groove 13. The first boss 22 and the second boss 23 are connected by a second stepped connecting wall 24. The first pivot part 313 and the second pivot part 322 are both located in the first boss 22 on the right side of the door leaf 2. The first stepped connecting wall 14 and the second stepped connecting wall 24 are both provided with an opening for the middle part 311 to pass through (not shown in the figure). The front wall of the first boss 22 is provided with an opening for the second connecting part 321 to pass through (not shown in the figure). The first connecting part 312 is fixedly connected to the inner wall of the first stepped connecting wall 14 by screws, and the second connecting part 321 is fixedly connected to the outer wall of the second stepped connecting wall 24 by screws.

[0025] During installation, the hinge pin of hinge 3 is installed inside the first boss 22 on the right side of door leaf 2. The middle part 311 of the first connector 31 passes through the opening of the first stepped connecting wall 14 and the second stepped connecting wall 24, so that the first connecting part 312 extends into the inner wall of the second stepped connecting wall 24 on the door frame 1, and the first connector 31 is fixedly connected to the door frame 1 by screws. The second connecting part 321 of the second connector 32 passes through the opening on the first boss 22, and the second connector 32 is fixedly connected to the door leaf 2 by screws, thus completing the installation of door leaf 2 on door frame 1.

[0026] As described above, sealing strips 4 are provided between the first protrusion 22 and the first groove 12, and between the second protrusion 23 and the second groove 13; the door leaf 2 is provided with a door handle for opening and closing.

[0027] As described above, there are two pairs of hinges 3 on the upper and lower parts of one side of the door leaf 2.

[0028] As described above, a door frame 5 is provided on the front side of the door frame 1, and the door frame 1 and the door frame 5 are integrally formed profiles.

[0029] The above description is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Any simple equivalent changes and modifications made in accordance with the scope of the present utility model patent application and the description of the utility model shall still fall within the scope of the present utility model patent.

Claims

1. A concealed inward-opening security door with a flush frame and door leaf, comprising a door frame and a door leaf, characterized in that: The inner side of the door frame is provided with stepped grooves that decrease in size from back to front. The stepped grooves include a first groove located on the rear side of the door frame and a second groove located on the front side of the door frame. The outer side of the door leaf is provided with stepped protrusions that are adapted to the stepped grooves. When the door leaf is closed, the front and rear sides of the door frame are flush with the front and rear sides of the door leaf, respectively. The stepped protrusions include a first protrusion that is adapted to the first groove. A hinge is installed on the first protrusion. The hinge includes a first connector and a second connector that are hinged to each other. The first connector and the second connector are fixed to the door frame and the door leaf, respectively, so that the door leaf is rotatably connected to the door frame.

2. The concealed inward-opening security door with flush frame and sash as described in claim 1, characterized in that, The first connector includes a C-shaped middle portion, a first connecting portion that bends and extends forward from the front side of the middle portion, and a first pivot portion that extends inward along the circumferential direction from the rear side of the middle portion; the second connector includes a second connecting portion and a second pivot portion that extends along the circumferential direction from the rear side of the second connecting portion and is located on the right side of the second connecting portion.

3. The concealed inward-opening security door with flush frame and sash as described in claim 2, characterized in that, Both the first pivot and the second pivot are cylindrical and are hinged to each other via a hinge shaft.

4. The concealed inward-opening security door with flush frame and sash as described in claim 3, characterized in that, The first groove and the second groove are connected by a first stepped connecting wall. The stepped protrusion also includes a second protrusion adapted to the second groove. The first protrusion and the second protrusion are connected by a second stepped connecting wall. The first pivot and the second pivot are both located in the first protrusion on the right side of the door leaf. The first stepped connecting wall and the second stepped connecting wall are both provided with openings for the middle part to pass through. The front wall of the first protrusion is provided with an opening for the second connecting part to pass through. The first connecting part is fixedly connected to the inner wall of the first stepped connecting wall by screws. The second connecting part is fixedly connected to the outer wall of the second stepped connecting wall by screws.

5. A concealed inward-opening security door with flush frame and sash as described in claim 4, characterized in that, A sealing strip is provided between the first boss and the first groove, and between the second boss and the second groove.

6. The concealed inward-opening security door with flush frame and sash as described in claim 1, characterized in that, Two pairs of hinges are distributed on the upper and lower parts of one side of the door leaf.

7. The concealed inward-opening security door with flush frame and sash as described in claim 1, characterized in that, A door frame is provided on the front side of the door frame, and the door frame and the door frame are integrally formed profiles.

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