Extremely simple door frame with flat outside and opening inside
By using a multi-cavity design and a minimalist door frame made of stainless steel with an outer flat and inner opening, the problem of insufficient structural strength and excessive thickness of traditional door frames has been solved. This has resulted in a high-strength door frame design with a modern and minimalist style, and improved wind pressure resistance, impact resistance and sound insulation performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-04-03
AI Technical Summary
Traditional outward-opening and inward-opening door frame structures lack sufficient strength, making ultra-thin designs impossible. They are also prone to deformation under external impact, affecting aesthetics and practicality.
The minimalist door frame with an outer flat and inner opening design features a multi-cavity structure, including a main frame and a secondary frame. The main frame has an internal cavity, which, combined with stainless steel and sealing strips, enhances structural strength and tight fit.
It enhances the door frame's resistance to wind pressure and impact, improves the sense of spaciousness and sound insulation, and is suitable for modern minimalist style decoration.
Smart Images

Figure CN224078955U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of door frame technology, and in particular to a minimalist door frame with an outer flat and inner opening design. Background Technology
[0002] The main functions of a door frame are to secure the door leaf, protect wall corners, and serve as decoration. It is commonly used in interior decoration to protect doors from scratches, corrosion, damage, and dirt.
[0003] Currently, there are outward-opening and inward-opening door frames on the market. The front side of the door frame and the front of the door are on the same plane, which has the characteristics of simplicity and aesthetics. However, traditional outward-opening and inward-opening door frames generally have the following technical defects:
[0004] 1. Insufficient structural strength: Conventional single-cavity door frames are prone to deformation due to their small cross-sectional area and stress concentration under frequent opening and closing or external impact.
[0005] 2. Traditional door frames are thick and cannot be made ultra-thin due to the limitations of the cavity structure, which conflicts significantly with the modern minimalist style.
[0006] Therefore, in order to solve the aforementioned problems, we propose a minimalist door frame with an outer flat and inner opening design. Utility Model Content
[0007] The purpose of this utility model is to solve the defects existing in the prior art by proposing a minimalist door frame with an outer flat and inner opening.
[0008] To achieve the above objectives, the present invention adopts the following technical solution:
[0009] A minimalist door frame with an outer flat and inner opening design includes a main frame and a secondary frame. The main frame has a mounting slot on its rear side, and the secondary frame is fixedly installed on the rear side of the main frame through the mounting slot. The main frame has two cavities inside, and a bolt slot is installed inside the second cavity. The main frame has a T-shaped cross-section, and a sealing strip is fixedly installed on one side of the back of the main frame.
[0010] Furthermore, it also includes a doorway wall and a room door. The main sleeve and the secondary sleeve are both fixedly installed on one side of the doorway wall, and the room door is movably installed on one side of the secondary sleeve. The sealing strip is located on the side close to the room door, and the front of the room door is flush with the front of the main sleeve.
[0011] Furthermore, a decorative groove is provided on the front of the main sleeve, and a decorative strip is fixedly installed inside the decorative groove.
[0012] Furthermore, both the main sleeve and the auxiliary sleeve are made of stainless steel.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0014] 1. The design of cavity one and cavity two of this utility model can disperse the impact of external forces, increase the cross-sectional area of the profile, form a good support system, and significantly improve the overall wind pressure resistance and impact resistance of the door frame. It is especially suitable for scenarios where the external flat design needs to withstand greater external forces. Moreover, the multi-cavity design can effectively share the weight of the door leaf and external pressure, such as vibration when opening and closing the door, and prevent the door frame from twisting or sinking due to long-term uneven stress.
[0015] 2. The sealing strip allows for a tight fit between the door frame and the door, improving sound insulation and airtightness.
[0016] 3. The wall thickness of both the main frame and the secondary frame is between 1 mm and 3 mm. This millimeter-level thickness breaks through the visual heaviness of traditional door frames. The ultra-narrow frame, achieved through precision machining, maximizes the sense of space and is especially suitable for modern minimalist and light luxury style decoration. Attached Figure Description
[0017] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.
[0018] Figure 1 This is a perspective view of the main sleeve and the auxiliary sleeve of this utility model;
[0019] Figure 2 This is a cross-sectional view of the present invention in its installed state;
[0020] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle.
[0021] In the diagram: 1. Main sleeve; 2. Secondary sleeve; 3. Cavity 1; 4. Cavity 2; 5. Decorative strip; 6. Doorway wall; 7. Door; 8. Sealing strip; 9. Bolt groove. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model;
[0023] Reference Figure 1-3A minimalist door frame with an outer flat and inner opening design includes a main sleeve 1 and a secondary sleeve 2. The main sleeve 1 has a mounting groove on its rear side, and the secondary sleeve 2 is fixedly installed on the rear side of the main sleeve 1 via the mounting groove. The main sleeve 1 has two internal cavities, a first cavity 3 and a second cavity 4. A bolt groove 9 is installed inside the second cavity 4. The main sleeve 1 has a T-shaped cross-section, and a sealing strip 8 is fixedly installed on one side of the back of the main sleeve 1. The frame also includes a doorway wall 6 and a door 7. The main sleeve 1 and the secondary sleeve 2 are both fixedly installed on one side of the doorway wall 6, and the door 7 is movably installed on one side of the secondary sleeve 2. The sealing strip 8 is located near the door 7, and the front of the door 7 is flush with the front of the main sleeve 1.
[0024] The design of cavity 3 and cavity 4 can disperse the impact of external forces, increase the cross-sectional area of the profile, form a good support system, and significantly improve the overall wind pressure resistance and impact resistance of the door frame. It is especially suitable for scenarios where the external flat design needs to withstand greater external forces. Moreover, the multi-cavity design can effectively distribute the weight of the door leaf and external pressure, such as vibration when opening and closing the door, and prevent the door frame from twisting or sinking due to long-term uneven stress.
[0025] The sealing strip 8 ensures a tight fit between the door frame and the door 7, improving sound insulation and airtightness. The main sleeve 1 is fixedly installed in the door opening via bolts and bolts through bolt grooves 9.
[0026] The front of the main sleeve 1 has a decorative groove, and a decorative strip 5 is fixedly installed inside the decorative groove. Both the main sleeve 1 and the secondary sleeve 2 are made of stainless steel; the decorative strip 5 is treated with the same color as the main sleeve 1 and the secondary sleeve 2 to ensure overall color uniformity.
[0027] The wall thickness of both the main frame 1 and the secondary frame 2 is between 1 mm and 3 mm. This millimeter-level thickness breaks through the visual heaviness of traditional door frames. The ultra-narrow frame, achieved through precision machining, maximizes the sense of space and is especially suitable for modern minimalist and light luxury style decoration.
Claims
1. A minimalist door frame of outside flat and inside open type, comprising a main sleeve (1), a secondary sleeve (2), characterized in that, The rear side of the main sleeve (1) is provided with a mounting clamping groove, the auxiliary sleeve (2) is fixedly installed on the rear side of the main sleeve (1) through the mounting clamping groove, the inside of the main sleeve (1) is provided with a cavity one (3) and a cavity two (4), the inside of the cavity two (4) is provided with a bolt groove (9), the cross section of the main sleeve (1) is T-shaped structure, one side of the back of the main sleeve (1) is fixedly provided with a sealing strip (8).
2. A minimal door frame according to claim 1, characterized in that It also includes a door hole wall (6), a house door (7), the main sleeve (1) and the auxiliary sleeve (2) are fixedly installed on one side of the door hole wall (6), the house door (7) is movably installed on one side of the auxiliary sleeve (2), the sealing strip (8) is located on one side close to the house door (7), the front of the house door (7) is flush with the front of the main sleeve (1).
3. The outside flush inside swing minimal door frame according to claim 1, characterized in that, The front of the main sleeve (1) is provided with a decorative groove, the inside of the decorative groove is fixedly provided with a decorative strip (5).
4. The outside flush inside swing minimal door frame according to claim 1, characterized in that, The main sleeve (1) and the auxiliary sleeve (2) are made of stainless steel.