A door and window with a guard grid
By adding a component design, the rotating disk drives the worm gear and worm wheel transmission, which in turn moves the toothed plate to the limit rod, solving the problem of complex installation of traditional door and window protective grilles. This enables fast and flexible installation and disassembly of protective grilles, adapting to different sizes and protection requirements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU MUSHANG DOOR & WINDOW TECH CO LTD
- Filing Date
- 2025-06-16
- Publication Date
- 2026-06-23
AI Technical Summary
Traditional window and door protective grilles are complex to install, requiring drilling, welding, and other operations, which are time-consuming and cannot be installed quickly. Furthermore, the fixed specifications cannot be compatible with different sizes, customization is costly, and the density cannot be flexibly adjusted.
The design incorporates additional components, which drive the worm gear and worm wheel transmission by rotating the rotating disk, thereby moving the toothed plate and the limiting rod to achieve quick engagement or disengagement of the protective grid. Combined with the sliding fit between the trapezoidal block and the trapezoidal groove, it supports the quick insertion and removal of the protective grid along the door and window body, adapting to different protection needs.
It enables quick installation and removal of protective grilles, can be operated by a single person, adapts to doors and windows of different sizes, and meets various protection needs, such as child protection and enhanced anti-theft.
Smart Images

Figure CN224396366U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of door and window technology, and more specifically, to a door and window that is easy to install with protective grilles. Background Technology
[0002] Doors and windows are an important part of the building envelope, mainly used for functions such as separating the interior and exterior spaces of a building, providing lighting, ventilation, heat insulation, sound insulation, and security. Their design and performance directly affect the comfort, safety, and energy efficiency of the building.
[0003] Traditional window and door protective grilles rely on expansion bolts or welding for fixing, which requires complex operations such as drilling and welding. Each installation takes a long time and requires professional tools, making it difficult to meet the needs of rapid addition and modification of protective grilles. Fixed-size protective grilles cannot be compatible with different window and door sizes, customization costs are high, and the protective density cannot be flexibly adjusted.
[0004] Therefore, we have made improvements and proposed a type of door and window that is easy to install with protective grilles. Utility Model Content
[0005] The purpose of this utility model is that: traditional protective grids rely on expansion screws or welding for fixing, which requires complex operations such as drilling and welding. Each installation takes a long time and requires professional tools, making it difficult to meet the needs of rapid installation and modification of protective grids. Fixed-size protective grids cannot be compatible with different door and window sizes, customization costs are high, and the protective density cannot be flexibly adjusted.
[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution:
[0007] A type of door and window that is easy to install with protective grilles to improve the above-mentioned problems.
[0008] The application is as follows:
[0009] The device includes: a door / window body; a connecting frame is fixedly installed at the top and bottom of the door / window body; trapezoidal grooves are opened at the top and bottom of the rear side of the door / window body; multiple protective grid bodies are slidably connected to the inner cavity of the door / window body; trapezoidal blocks are fixedly installed at the top and bottom of the front side of the protective grid bodies; the trapezoidal blocks are slidably connected to the door / window body through the protective grid bodies; a protective shell is fixedly installed on the front side of the door / window body; an auxiliary component is movably connected to one side of the inner cavity of the protective shell; and limit grooves are opened at the top and bottom of the protective grid bodies.
[0010] To achieve the above technical solution, the design of the added components drives the worm gear and worm wheel to move the toothed plate and limit rod, which can quickly engage or disengage a single set of protective grid bodies, improving efficiency compared to the traditional method. The sliding cooperation between the trapezoidal block and the trapezoidal groove supports the quick insertion and removal of the protective grid body along the door and window body. It can be operated by a single person. The protective grid body can be freely added or removed along the vertical direction of the door and window body to adapt to different protection needs, such as child protection and anti-theft enhancement.
[0011] As a preferred embodiment of the door and window with easy installation of protective grilles provided by this utility model, the installation component includes a movable rod, which is movably connected to one side of the inner cavity of the protective shell. A rotating disk is fixedly installed on the left side of the movable rod. A worm gear is fixedly installed on the surface of the movable rod. A worm wheel is meshed at the bottom of the worm gear. A transmission rod is fixedly installed in the inner cavity of the worm wheel. A rotating gear is fixedly installed on the surface of the transmission rod. Toothed plates are meshed on both sides of the rotating gear. A baffle is fixedly installed on the opposite side of the two toothed plates. Multiple limiting rods are fixedly installed on the opposite side of the two baffles. Multiple springs are fixedly installed on the opposite side of the two baffles. The side of the spring closest to the connecting frame is fixedly connected to the connecting frame. The limiting rod is engaged with the protective grille body through a limiting groove.
[0012] As a preferred embodiment of the door and window that is easy to install protective grilles according to the present utility model, a first bearing seat is movably connected to one side of the movable rod, and the side of the first bearing seat near the protective shell is fixedly connected to the protective shell.
[0013] As a preferred embodiment of the door and window that is easy to install protective grilles as provided by this utility model, the front and rear sides of the transmission rod are movably connected with second bearing seats, and the side of the second bearing seat near the protective shell is fixedly connected to the protective shell.
[0014] As a preferred embodiment of the door and window that is easy to install protective grilles as provided by this utility model, limit blocks are fixedly installed on opposite sides of the two toothed plates, and the limit blocks are slidably connected to the inner cavity of the door and window body.
[0015] As a preferred embodiment of the door and window that is easy to install protective grilles according to the present utility model, sliding blocks are fixedly installed on both sides of the baffle, and sliding rods are slidably connected to the inner cavity of the sliding blocks. The side of the sliding rods near the connecting frame is fixedly connected to the connecting frame.
[0016] As a preferred embodiment of the door and window that is easy to install protective grilles according to the present utility model, the top and bottom of the protective shell are fixedly installed with stabilizing blocks, and the side of the stabilizing block near the door and window body is fixedly connected to the door and window body.
[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0018] This utility model provides a door and window that is easy to install with protective grilles. Through the design of the added components, the rotating disk drives the worm gear and worm wheel transmission, which drives the toothed plate to move the limiting rod, which can quickly engage or disengage a single set of protective grille bodies. This improves efficiency compared to the traditional method. The sliding cooperation between the trapezoidal block and the trapezoidal groove supports the quick insertion and removal of the protective grille body along the door and window body. It can be operated by a single person. The protective grille body can be freely added or removed along the vertical direction of the door and window body to adapt to different protection needs, such as child protection and enhanced anti-theft. Attached Figure Description
[0019] Figure 1 A structural diagram of a door or window for easy installation of protective grilles, provided for this application;
[0020] Figure 2 A rear-view split diagram of the structure of the door and window for which protective grilles are easily installed, provided for this application;
[0021] Figure 3 A rear sectional view of the structure of the door and window for which protective grilles are to be installed, provided for this application;
[0022] Figure 4 A front view schematic diagram of the installation components for doors and windows that facilitate the installation of protective grilles, as provided in this application.
[0023] The image shows:
[0024] 1. Door / window body; 2. Connecting frame; 3. Trapezoidal groove; 4. Protective grille body; 5. Trapezoidal block; 6. Protective shell; 7. Addition components; 701. Movable rod; 702. Rotating disk; 703. Worm gear; 704. Worm wheel; 705. Transmission rod; 706. Rotating gear; 707. Tooth plate; 708. Baffle; 709. Limiting rod; 710. Spring; 711. First bearing seat; 712. Second bearing seat; 713. Limiting block; 714. Sliding block; 715. Sliding rod; 8. Limiting groove; 9. Stabilizing block. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.
[0026] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0027] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.
[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0029] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0030] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
[0031] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.
[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0033] Please refer to Figure 1-4A door and window that is easy to install protective grilles includes: a door and window body 1; a connecting frame 2 is fixedly installed on the top and bottom of the door and window body 1; trapezoidal grooves 3 are opened on the top and bottom of the rear side of the door and window body 1; multiple protective grille bodies 4 are slidably connected to the inner cavity of the door and window body 1; trapezoidal blocks 5 are fixedly installed on the top and bottom of the front side of the protective grille body 4; trapezoidal blocks 5 are slidably connected to the door and window body 1 through the protective grille body 4; a protective shell 6 is fixedly installed on the front side of the door and window body 1; an installation component 7 is movably connected to one side of the inner cavity of the protective shell 6; and limit grooves 8 are opened on the top and bottom of the protective grille body 4.
[0034] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4The added component 7 includes a movable rod 701, which is movably connected to one side of the inner cavity of the protective shell 6. A rotating disk 702 is fixedly installed on the left side of the movable rod 701. A worm gear 703 is fixedly installed on the surface of the movable rod 701. A worm wheel 704 meshes with the bottom of the worm gear 703. A transmission rod 705 is fixedly installed in the inner cavity of the worm wheel 704. A rotating gear 706 is fixedly installed on the surface of the transmission rod 705. Tooth plates 707 mesh with both sides of the rotating gear 706. A baffle 708 is fixedly installed on the opposite side of the two tooth plates 707. Multiple limiting rods 709 are fixedly installed on the opposite side of the two baffles 708. Multiple springs 710 are fixedly installed on the opposite side of the two baffles 708. The side of the spring 710 closest to the connecting frame 2 is fixedly connected to the connecting frame 2. The limiting rods 709 are engaged with the protective grid body 4 through the limiting groove 8. A first bearing seat 711 is movably connected to one side of the movable rod 701, and the first bearing seat 711 is fixedly connected to the protective shell 6 on the side near the protective shell 6. A second bearing seat 712 is movably connected to both the front and rear sides of the transmission rod 705, and the second bearing seat 712 is fixedly connected to the protective shell 6 on the side near the protective shell 6. Limiting blocks 713 are fixedly installed on opposite sides of the two toothed plates 707, and the limiting blocks 713 are slidably connected to the inner cavity of the door / window body 1. Sliding blocks 714 are fixedly installed on both sides of the baffle 708, and a sliding rod 715 is slidably connected to the inner cavity of the sliding block 714, and the sliding rod 715 is fixedly connected to the connecting frame 2 on the side near the connecting frame 2. Stabilizing blocks 9 are fixedly installed on the top and bottom of the protective shell 6, and the stabilizing blocks 9 are fixedly connected to the door / window body 1 on the side near the door / window body 1. Align the trapezoidal block 5 of the protective grid body 4 with the trapezoidal groove 3 of the door / window body 1, and push it vertically into the limiting groove 8 until it aligns with the limiting rod 709. Rotate the rotating disk 702 clockwise to drive the movable rod 701 and worm gear 703 to rotate, which in turn drives the worm wheel 704 and transmission rod 705 to rotate. This causes the rotating gear 706 to drive the two toothed plates 707 to move towards each other. The toothed plates 707 push the limiting rod 709 into the limiting groove 8 through the baffle 708, forming a mechanical lock. To disassemble, rotate the rotating disk 702 counterclockwise, and the worm gear 709 will... 3 and worm gear 704 drive in opposite directions, limit rod 709 disengages from limit groove 8, protective grid body 4 can be pulled out, trapezoidal block 5 slides out along trapezoidal groove 3 to complete disassembly, limit block 713 and sliding block 714 slide in the slide rails of door and window body 1 and connecting frame 2 respectively, limiting the displacement of toothed plate 707 and baffle 708, ensuring that limit rod 709 is accurately aligned with limit groove 8, which can be operated by a single person. Protective grid body 4 can be freely added or removed along the vertical direction of door and window body 1 to adapt to different protection needs, such as child protection and anti-theft enhancement.
[0035] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present utility model.
Claims
1. A door and window with a security screen which is easily fitted, characterised in that, include: Door and window body (1); The top and bottom of the door and window body (1) are fixedly installed with connecting frames (2), the top and bottom of the rear side of the door and window body (1) are provided with trapezoidal grooves (3), the inner cavity of the door and window body (1) is slidably connected with multiple protective grid bodies (4), the top and bottom of the front side of the protective grid body (4) are fixedly installed with trapezoidal blocks (5), the trapezoidal blocks (5) are slidably connected to the door and window body (1) through the protective grid body (4), the front side of the door and window body (1) is fixedly installed with a protective shell (6), one side of the inner cavity of the protective shell (6) is movably connected with an auxiliary component (7), and the top and bottom of the protective grid body (4) are provided with limit grooves (8).
2. A door and window with a security screen according to claim 1, wherein, The mounting component (7) includes a movable rod (701), which is movably connected to one side of the inner cavity of the protective shell (6). A rotating disk (702) is fixedly installed on the left side of the movable rod (701). A worm gear (703) is fixedly installed on the surface of the movable rod (701). A worm wheel (704) meshes with the bottom of the worm gear (703). A transmission rod (705) is fixedly installed in the inner cavity of the worm wheel (704). A rotating gear (706) is fixedly installed on the surface of the transmission rod (705). Both sides of the rotating gear (706) are meshed with toothed plates (707). A baffle (708) is fixedly installed on the opposite side of the two toothed plates (707). Multiple limiting rods (709) are fixedly installed on the opposite side of the two baffles (708). Multiple springs (710) are fixedly installed on the opposite side of the two baffles (708). The side of the spring (710) close to the connecting frame (2) is fixedly connected to the connecting frame (2). The limiting rod (709) is engaged with the protective grid body (4) through the limiting groove (8).
3. A door and window with a security screen according to claim 2, wherein, The first bearing seat (711) is movably connected to one side of the movable rod (701), and the first bearing seat (711) is fixedly connected to the protective shell (6) on the side near the protective shell (6).
4. A door and window with a security screen according to claim 2, wherein, The transmission rod (705) is movably connected to the front and rear sides of the second bearing seat (712), and the side of the second bearing seat (712) near the protective shell (6) is fixedly connected to the protective shell (6).
5. The door and window with the security screen according to claim 2, wherein, Limiting blocks (713) are fixedly installed on opposite sides of the two toothed plates (707), and the limiting blocks (713) are slidably connected to the inner cavity of the door and window body (1).
6. A door and window with a security screen according to claim 2, wherein, Sliding blocks (714) are fixedly installed on both sides of the baffle (708). A sliding rod (715) is slidably connected to the inner cavity of the sliding block (714). The sliding rod (715) is fixedly connected to the connecting frame (2) on the side close to the connecting frame (2).
7. The door and window with the easily installed protective grid according to claim 1, characterized in that, The protective shell (6) is fixedly installed with stabilizing blocks (9) at both the top and bottom. The stabilizing blocks (9) are fixedly connected to the door and window body (1) on the side closest to the door and window body (1).