A locking buckle for a filter screen of a range hood

Abstract

This utility model relates to the field of filter screen locking, and discloses a range hood filter screen locking mechanism, including a first filter screen, a second filter screen disposed on the top of the first filter screen, a locking body disposed inside the first filter screen, a notch on the outer wall of the first filter screen, a limiting bracket fixedly connected to the inner surface of the first filter screen, an extension plate fixedly connected to the outer wall of the locking body, a positioning hook fixedly connected to the inner surface of the first filter screen, a spring fixedly connected to the outer wall of the locking body, a positioning ring fixedly connected to the end of the spring, a handle fixedly connected to the outer wall of the locking body, a locking hole on the outer wall of the second filter screen, and a locking block fixedly connected to the outer wall of the locking body. In this utility model, the filter screen can be locked or released with a single hand press through the spring's self-resetting mechanism and the lateral constraint of the L-shaped limiting bracket. The operating stroke is short, and the two filter screens remain tightly fitted even after long-term use, improving the efficiency of disassembly and cleaning.

Description

Technical Field

[0001] This utility model relates to the field of filter locks, and in particular to a filter lock for a range hood. Background Technology

[0002] The core function of the range hood filter lock is to firmly lock the filter to the body, preventing it from shifting or falling off due to airflow impact or motor vibration during high-speed operation. At the same time, it ensures that the filter fits tightly with the air duct, maintaining the best smoke collection and grease separation effect. The range hood filter lock is a small clip or locking mechanism fixed to the range hood body to hold the filter in place. It is usually a plastic clip, a metal spring, or a knob screw.

[0003] When using the filter lock, align the range hood filter with the installation position, and first secure the side with the lock installation structure. Usually, there will be holes or grooves on the edge of the filter to fit the lock. Align the movable part of the lock with the corresponding installation position on the filter, press or rotate the lock to allow the lock part to embed into the hole or groove of the filter, and firmly fix the filter to the range hood. When cleaning the filter, reverse the unlocking action, such as prying the unlocking part of the lock to separate the lock from the filter, and then remove the filter for cleaning. After cleaning, reinstall the filter according to the installation steps.

[0004] In existing technologies, the installation positions of the latch and filter screen lack guiding or limiting designs, requiring users to visually judge the alignment status. This is especially problematic when range hoods are often installed at high locations with obstructed views, making precise alignment difficult. Users need to repeatedly adjust the angle and position of the filter screen and attempt multiple times to achieve alignment, increasing installation time. If the latch is forcibly engaged or rotated when not aligned, the holes or grooves on the filter screen edge may deform, and the moving parts of the latch may wear down, leading to long-term installation failure and making subsequent fixation even more difficult. Therefore, a new range hood filter screen latch is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a range hood filter lock, which aims to improve the problem in the prior art where the installation position of the range hood filter lock is difficult to align precisely with the lock, requiring pressing or snapping, which leads to inconvenience in disassembly.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a range hood filter lock, comprising a filter one, a filter two disposed on the top of the filter one, a lock body disposed inside the filter one, a notch formed on the outer wall of the filter one, a limit bracket fixedly connected to the inner surface of the filter one, an extension plate fixedly connected to the outer wall of the lock body, a positioning hook fixedly connected to the inner surface of the filter one, a spring fixedly connected to the outer wall of the lock body, a positioning ring fixedly connected to the end of the spring, a handle fixedly connected to the outer wall of the lock body, a lock hole formed on the outer wall of the filter two, a lock block fixedly connected to the outer wall of the lock body, and a through groove formed on the outer wall of the filter two.

[0007] As a further description of the above technical solution:

[0008] The positioning hook is L-shaped, and the positioning ring is fitted onto the outer wall of the positioning hook.

[0009] As a further description of the above technical solution:

[0010] The limiting frame is L-shaped, and the inner surface of the limiting frame is adapted to the outer wall of the extension plate.

[0011] As a further description of the above technical solution:

[0012] The through groove is fitted onto the outer wall of the handle, and the outer wall of the lock block is adapted to the inner wall of the lock hole.

[0013] As a further description of the above technical solution:

[0014] The lock hole is fixedly connected to the outer wall of the lock body at the end away from the spring.

[0015] As a further description of the above technical solution:

[0016] The notch is fitted onto the outer wall of the locking block.

[0017] This utility model has the following beneficial effects:

[0018] 1. In this utility model, the filter screen can be locked or released by one hand by spring self-resetting and L-shaped limiting frame lateral constraint. No tools are required, the operation stroke is short, the locking block is hidden inside the filter screen, the appearance is flat and not easy to bump, the spring continuous pre-compression eliminates loosening noise, and the two layers of filter screen are still tightly attached after long-term use, improving the efficiency of disassembly and cleaning. Attached Figure Description

[0019] Figure 1 This is a top view schematic diagram of the main structure of a range hood filter lock proposed in this utility model;

[0020] Figure 2This utility model proposes a range hood filter lock. Figure 1 Enlarged view of region A in the middle;

[0021] Figure 3 This is a schematic diagram of the main structure of a range hood filter lock according to the present invention, showing the removal of the second filter screen;

[0022] Figure 4 This utility model proposes a range hood filter lock. Figure 4 Enlarged view of region B in the middle;

[0023] Figure 5 This is a schematic diagram of the locking body of a range hood filter lock proposed in this utility model.

[0024] Legend:

[0025] 1. Filter screen one; 2. Filter screen two; 3. Lock body; 4. Notch; 5. Limiting bracket; 6. Extension plate; 7. Positioning hook; 8. Positioning ring; 9. Spring; 10. Handle; 11. Lock block; 12. Lock hole; 13. Through groove. Detailed Implementation

[0026] 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.

[0027] Reference Figures 1-3This utility model provides an embodiment of a range hood filter lock, including a filter 1, a filter 2 on the top of the filter 1, the filter 2 and the filter 1 working together to enhance the layering and efficiency of fume filtration, a lock body 3 inside the filter 1, and a notch 4 on the outer wall of the filter 1, the size of the notch 4 precisely matching the cross-sectional size of the lock block 11, providing a channel for the lock block 11 to extend out of the outer wall of the filter 11, and preventing the lock block 11 from wobbling left and right during movement. A limit frame 5 is fixedly connected to the inner surface of the filter 1, the limit frame 5 is fixed to the inner wall of the filter 1 by welding or integral molding, which can strictly limit the movement range of the extension plate 6 and prevent excessive displacement of the lock body 3. In case of structural failure, the limiting frame 5 is L-shaped. The L-shaped limiting frame 5 consists of a horizontal section and a vertical section. The horizontal section restricts the vertical movement of the extension plate 6, and the vertical section constrains the left and right offset of the extension plate 6, thereby achieving bidirectional limiting of the locking body 3. The extension plate 6 is fixedly connected to the outer wall of the locking body 3. The extension plate 6 moves synchronously with the locking body 3. Through sliding cooperation with the limiting frame 5, it ensures that the locking body 3 always moves smoothly in the preset direction and avoids jamming. The inner surface of the limiting frame 5 is adapted to the outer wall of the extension plate 6. The two adopt a clearance fit design, with the clearance controlled between 0.1-0.3mm. This ensures that the extension plate 6 slides flexibly within the limiting frame 5 and effectively prevents shaking caused by excessive clearance.

[0028] Reference Figures 3-5A positioning hook 7 is fixedly connected to the inner surface of filter screen 1. The positioning hook 7 is made of high-strength plastic or metal and provides a reliable force support point for the positioning ring 8 and spring 9. The positioning hook 7 is L-shaped, and the end of the L-shaped positioning hook 7 is bent upward to form a retaining edge. When the positioning ring 8 is fitted on it, the retaining edge can effectively prevent the positioning ring 8 from falling off under the elastic force of the spring 9, ensuring that the spring 9 is firmly connected. A spring 9 is fixedly connected to the outer wall of the latch body 3. The spring 9 is a stainless steel spring with good elastic recovery performance. When the latch body 3 is pulled, it deforms and stores elastic force. After being released, it drives the latch body 3 to automatically reset. The end of the spring 9 is fixedly connected to the positioning ring 8. The positioning ring 8 adopts a ring structure, and its inner diameter matches the outer diameter of the positioning hook 7, which stably fixes one end of the spring 9 on the positioning hook 7, realizing the spring 9. Effective transmission of elasticity: The positioning ring 8 is sleeved on the outer wall of the positioning hook 7. The outer wall of the filter screen 2 has a locking hole 12. The locking hole 12 is fixedly connected to the outer wall of the lock body 3 away from the spring 9. The locking block 11 is made of wear-resistant material, and its end is designed with a rounded transition structure to facilitate smooth insertion into the locking hole 12 and reduce wear during insertion. The outer wall of the lock body 3 is fixedly connected to the locking block 11. The outer wall of the locking block 11 is adapted to the inner wall of the locking hole 12. The two adopt an interference fit or transition fit to ensure that the locking block 11 fits tightly after being inserted into the locking hole 12 and will not loosen due to vibration during the operation of the range hood. The notch 4 is sleeved on the outer wall of the locking block 11. The edge of the notch 4 is polished smooth to avoid scratching the surface of the locking block 11 during the movement of the locking block 11, and at the same time, it plays a precise guiding role in the movement of the locking block 11.

[0029] Reference Figure 2 A handle 10 is fixedly connected to the outer wall of the locking body 3. The handle 10 adopts a humanized arc design, which makes it convenient for users to pull or push with their fingers, improving the operation feel and convenience. A through groove 13 is opened on the outer wall of the filter screen 2. The length of the through groove 13 matches the movement stroke of the handle 10, ensuring that the handle 10 is not obstructed when driving the locking body 3 to complete the opening and closing action. The through groove 13 is fitted on the outer wall of the handle 10. The width of the through groove 13 is slightly larger than the width of the handle 10, which can not only ensure the flexible movement of the handle 10, but also play a lateral limiting role for the handle 10, preventing the handle 10 from deviating and causing the locking body 3 to malfunction.

[0030] Working principle: Filter screen 1 and filter screen 2 are connected and fixed by the locking body 3. The locking body 3 is adapted to the L-shaped limiting bracket 5 on the inner surface of filter screen 1 by the extension plate 6 fixed on its outer wall, thereby achieving lateral limiting. At the same time, the spring 9 sleeved on the positioning hook 7 provides a continuous elastic pressing force to the locking body 3 through the positioning ring 8 at its end, making it tend to move inward. When locking is required, press the handle 10 on the locking body 3 to make it move outward against the elastic force of the spring 9. The locking block 11 at the end of the locking body 3 then passes through the notch 4 on the outer wall of filter screen 1 and is inserted into the locking hole 12 on filter screen 2. After releasing the handle 10, under the action of the restoring force of the spring 9, the locking block 11 is firmly locked in the locking hole 12, thereby tightly connecting the two layers of filter screen. The through groove 13 provides space for the movement of the handle 10. When unlocking, pull the handle 10 outward again to make the locking block 11 exit the locking hole 12 to separate the filter screen.

[0031] 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 range hood filter lock, comprising a first filter (1), a second filter (2) disposed on the top of the first filter (1), and a lock body (3) disposed inside the first filter (1), characterized in that: The outer wall of filter screen one (1) has a notch (4), the inner surface of filter screen one (1) is fixedly connected to a limit bracket (5), the outer wall of the latch body (3) is fixedly connected to an extension plate (6), the inner surface of filter screen one (1) is fixedly connected to a positioning hook (7), the outer wall of the latch body (3) is fixedly connected to a spring (9), the end of the spring (9) is fixedly connected to a positioning ring (8), the outer wall of the latch body (3) is fixedly connected to a handle (10), the outer wall of filter screen two (2) has a lock hole (12), the outer wall of the latch body (3) is fixedly connected to a lock block (11), and the outer wall of filter screen two (2) has a through groove (13).

2. The range hood filter lock according to claim 1, characterized in that: The positioning hook (7) is L-shaped, and the positioning ring (8) is sleeved on the outer wall of the positioning hook (7).

3. The range hood filter lock according to claim 1, characterized in that: The limiting frame (5) is L-shaped, and the inner surface of the limiting frame (5) is adapted to the outer wall of the extension plate (6).

4. The range hood filter lock according to claim 1, characterized in that: The through groove (13) is fitted on the outer wall of the handle (10), and the outer wall of the lock block (11) is adapted to the inner wall of the lock hole (12).

5. The range hood filter lock according to claim 1, characterized in that: The lock hole (12) is fixedly connected to the outer wall of the end of the latch body (3) away from the spring (9).

6. The range hood filter lock according to claim 1, characterized in that: The notch (4) is fitted onto the outer wall of the locking block (11).

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