Bidirectional barb self-locking structure of seamless welding sash
By using a seamless welded sash with a bidirectional barbed self-locking structure, combined with multi-layer coatings and barbed components, the welding structure problem of non-thermal break windows and doors has been solved, achieving high strength, high sealing performance, and convenient installation, thus improving the service life and aesthetics of windows and doors.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-04-03
AI Technical Summary
Existing non-thermal break windows and doors have welded structures that suffer from poor airtightness, rough appearance, and low strength, making it difficult to simultaneously meet the requirements of high strength, high sealing performance, and convenient installation.
It adopts a seamless welded fan with a bidirectional barbed self-locking structure. By setting up multi-layer coatings and barb components, combined with aluminum alloy material, it achieves mechanical self-locking and process innovation, thereby improving overall performance.
While keeping costs under control, the lifespan and aesthetics of doors and windows have been significantly improved, while the safety and durability of the structure have also been enhanced.
Smart Images

Figure CN224078961U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of door and window accessories, and in particular to a seamless welded sash bidirectional barbed self-locking structure. Background Technology
[0002] Non-thermal break windows and doors are widely used in industrial plants, warehouse buildings, and residential applications due to their low cost and ease of processing. Their core structure consists of door and window sashes welded or spliced from profiles, which are then closed and fixed using hardware locks. Traditional door and window sash welding often uses spot welding or corner welding processes, resulting in obvious weld seams that are prone to oxide layers, leading to poor airtightness and a rough appearance. Welding thermal stress can also cause localized deformation of the profiles, reducing the overall structural strength. According to research, there is currently no non-thermal break window and door design that combines seamless welding technology with a two-way barbed self-locking structure, making it difficult to simultaneously meet the requirements of high strength, high sealing performance, and convenient installation.
[0003] To address this, a seamless welded sash with bidirectional barbs and self-locking mechanism for doors and windows is proposed. Utility Model Content
[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose a seamless welded sash bidirectional barbed self-locking structure. Through the setting of multiple coating structures, the service life and aesthetics of non-thermal broken windows can be significantly improved under the premise of controllable cost.
[0005] To achieve the above objectives, the present invention provides the following technical solution:
[0006] A seamless welded sash with bidirectional barbed self-locking structure includes a door / window frame. A connecting frame is provided on one side of the door / window frame. Nylon strips are provided on the sides of the door / window frame and the connecting frame that are close to each other. The upper and lower ends of the outer walls of the two sides of the nylon strips are fixedly connected with mounting barbs. A locking groove is opened on the upper surface of the connecting frame. A side frame is provided at the upper end of the connecting frame. A connecting barb is rigidly connected to the lower surface of the side frame. The outer wall of the door / window frame is sequentially sprayed with an aluminum oxide protective layer, a zinc plating layer, and a fluorocarbon coating.
[0007] Through the above technical solutions, the structure achieves a comprehensive performance upgrade in terms of safety, durability, environmental protection, and economy by using mechanical self-locking, material optimization, and process innovation.
[0008] Furthermore, both sides of the mounting hook are engaged with the inner top and inner bottom surfaces of the door / window outer frame and the connecting frame on the side closest to each other;
[0009] The above technical solution makes it easier to install the connecting frame and the mounting hook using nylon strips.
[0010] Furthermore, the connecting barb engages with the inner wall of the locking slot;
[0011] The above technical solution makes it easier to install and fix the side frame.
[0012] Furthermore, the outer frame, side frame, and connecting frame of the doors and windows are all made of aluminum alloy;
[0013] The above technical solutions, using aluminum alloy materials, can effectively improve the overall service life of door and window frames, side frames, and connecting frames.
[0014] This utility model has the following beneficial effects:
[0015] 1. The seamless welded sash bidirectional barbed self-locking structure proposed in this utility model, through the setting of multiple barbed components, enables the door and window structure to form a complete non-broken bridge frame structure by pressing, avoiding the problem of traditional methods that require equipment to squeeze and clamp.
[0016] 2. The seamless welded sash bidirectional barbed self-locking structure proposed in this utility model, through the setting of a multi-layer coating structure, can significantly improve the service life and aesthetics of non-thermal break windows and doors while keeping costs under control. Attached Figure Description
[0017] Figure 1 This is an isometric view of the seamless welded fan bidirectional barbed self-locking structure proposed in this utility model;
[0018] Figure 2 This is a side view of the seamless welded fan bidirectional barbed self-locking structure proposed in this utility model;
[0019] Figure 3 This is a schematic diagram of the side frame structure in the seamless welded fan bidirectional barbed self-locking structure proposed in this utility model;
[0020] Figure 4 This is a schematic diagram of the nylon strip in the seamless welded fan bidirectional barbed self-locking structure proposed in this utility model;
[0021] Figure 5 This is a schematic diagram of the outer frame of the door and window in the seamless welded fan bidirectional barbed self-locking structure proposed in this utility model;
[0022] Figure 6 This is a schematic diagram of the layers of the fluorocarbon coating and other structures in the seamless welded fan bidirectional barbed self-locking structure proposed in this utility model.
[0023] Legend:
[0024] 1. Door and window outer frame; 2. Side frame; 3. Connecting frame; 4. Nylon strip; 5. Aluminum oxide protective layer; 6. Connecting barb; 7. Installation barb; 8. Locking groove; 9. Galvanized layer; 10. Fluorocarbon coating. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] One embodiment provided by this utility model:
[0027] Reference Figure 1 , Figure 2 and Figure 6 :
[0028] The seamless welded sash bidirectional barbed self-locking structure includes a door and window outer frame 1, a connecting frame 3 on one side of the door and window outer frame 1, nylon strips 4 on the sides of the door and window outer frame 1 and the connecting frame 3 that are close to each other, mounting barbs 7 are fixedly connected to the upper and lower ends of the outer walls on both sides of the nylon strips 4, a locking groove 8 is opened on the upper surface of the connecting frame 3, a side frame 2 is provided at the upper end of the connecting frame 3, and a connecting barb 6 is rigidly connected to the lower surface of the side frame 2. The outer wall of the door and window outer frame 1 is sequentially sprayed with an aluminum oxide protective layer 5, a zinc plating layer 9 and a fluorocarbon coating 10.
[0029] This structure achieves a comprehensive performance upgrade in terms of safety, durability, environmental protection, and economy through mechanical self-locking, material optimization, and process innovation.
[0030] Reference Figure 1 , Figure 4 and Figure 5 :
[0031] Both sides of the mounting hook 7 are engaged with the inner top and bottom surfaces of the door / window outer frame 1 and the connecting frame 3 on the side closest to each other, so that the connecting frame 3 and the mounting hook 7 can be installed more easily by using the nylon strip 4.
[0032] Reference Figure 2 , Figure 3 and Figure 5 :
[0033] The connecting hook 6 engages with the inner wall of the locking slot 8, making it easier to install and fix the side frame 2. The door and window outer frame 1, side frame 2 and connecting frame 3 are all made of aluminum alloy. Using aluminum alloy can effectively improve the overall service life of the door and window outer frame 1, side frame 2 and connecting frame 3.
[0034] Working principle: In use, align the connecting frame 3 with one side of the door and window outer frame 1, then insert the nylon strip 4, so that the nylon strip 4 fixes the connecting frame 3 to the door and window outer frame 1 through the installation barb 7. Then, insert the connecting barb 6 of the side frame 2 into the locking groove 8 to fix the side frame 2. In daily use, the fluorocarbon coating 10 can effectively improve the UV resistance, acid and alkali resistance, and anti-powdering performance of the door and window outer frame 1. The aluminum oxide protective layer 5 can enhance the overall corrosion resistance and hardness of the non-thermal-break window and extend its service life. The galvanized layer 9 makes the non-thermal-break window and door have excellent rust prevention performance and extends the life of the steel.
[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A seamless welded double-barbed self-locking structure for doors and windows, including a door / window frame (1), characterized in that: A connecting frame (3) is provided on one side of the door and window outer frame (1). Nylon strips (4) are provided on the sides of the door and window outer frame (1) and the connecting frame (3) that are close to each other. The upper and lower ends of the outer walls of the two sides of the nylon strip (4) are fixedly connected with mounting hooks (7). A locking groove (8) is opened on the upper surface of the connecting frame (3). A side frame (2) is provided on the upper end of the connecting frame (3). A connecting hook (6) is rigidly connected to the lower surface of the side frame (2). An aluminum oxide protective layer (5), a zinc plating layer (9) and a fluorocarbon coating (10) are sprayed on the outer wall of the door and window outer frame (1) in sequence.
2. The seamless welded fan bidirectional barbed self-locking structure according to claim 1, characterized in that: The two sides of the mounting hook (7) are engaged with the inner top and inner bottom surfaces of the door and window outer frame (1) and the connecting frame (3) on the side closest to each other.
3. The seamless welded fan bidirectional barbed self-locking structure according to claim 1, characterized in that: The connecting barb (6) engages with the inner wall of the locking slot (8).
4. The seamless welded fan bidirectional barbed self-locking structure according to claim 1, characterized in that: The outer frame (1), side frame (2), and connecting frame (3) of the doors and windows are all made of aluminum alloy.