Garbage can
By using an arc-shaped petal plate and a torsion spring structure in the trash can, the trash bag automatically closes when it reaches a weight threshold, solving the problems of odor diffusion and unsanitary conditions at the opening of the trash bag, and improving ease of use and hygiene.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-09
- Publication Date
- 2026-03-20
AI Technical Summary
Garbage bags are prone to releasing odors and are unhygienic when throwing away garbage, and manually closing them is cumbersome.
Design a trash can that uses an arc-shaped petal plate and a torsion spring structure. When the trash inside the bag reaches a threshold weight, the arc-shaped petal plate automatically closes the bag opening, forming a closed constraint ring to prevent odor from spreading.
It enables automatic closure of garbage bag openings, reducing odor diffusion, improving ease of use and hygiene, and eliminating the need for manual operation.
Smart Images

Figure CN224014541U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of trash can technology, and in particular to a trash can. Background Technology
[0002] A trash can is a container used for collecting, storing, and disposing of garbage, typically made of plastic, metal, or other durable materials. Its main function is to help people organize and store waste for later cleaning or disposal. Trash cans are widely used in homes, offices, public places, and other locations.
[0003] Every time people throw away trash, they still need to turn, twist, or tie the trash bag with their hands, which inevitably leads to their hands coming into contact with the edge of the bag opening. Although office trash is usually waste paper and packaging bags, which are less contaminated, household kitchen waste and items such as fruit peels in the living room often make the bag opening dirty. In this case, not only will odors spread, but it will also make it unhygienic to touch the edge of the bag when it is closed. Utility Model Content
[0004] In view of the shortcomings of the existing technology, this utility model provides a trash can that solves the technical problem that not only does the odor from the opening of the trash bag spread, but it also makes it unhygienic to touch the edge of the bag when it is closed.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a trash can, comprising:
[0006] The base has multiple mounting slots along its edges;
[0007] An arcuate lobular plate, comprising at least three arcuate lobular plates, each arcuate lobular plate including:
[0008] A radially extending hinged end is hinged within the mounting groove, and the non-rotating side of the hinged end forms a mechanical limiting contact surface with the inner wall of the mounting groove;
[0009] The axially extending free end has an outward-facing arc-shaped hook at the end;
[0010] A dynamic adjustment gap is formed between the turning side of the hinge end and the inner wall of the mounting groove;
[0011] Torsion springs, multiple torsion springs are respectively sleeved on the hinge ends of each arc-shaped petal plate and have adjustable preload;
[0012] When the weight of the garbage hanging inside the garbage bag reaches a threshold, the hinged ends of each arc-shaped petal plate gradually rotate against the preload of the torsion spring, achieving:
[0013] The garbage bag opening gradually narrows radially;
[0014] Multiple arc-shaped hooks form a closed constraint loop;
[0015] The dynamic clearance adapts and adjusts itself as the rotation angle changes.
[0016] Preferably, the plurality of the arc-shaped petal plates form a semi-circular storage cavity in the initial state, and the initial opening diameter of the semi-circular storage cavity does not exceed the diameter of the base.
[0017] Preferably, the hinge end of the arc-shaped petal plate is initially vertically positioned in the mounting groove, and its rotating side forms a dynamic gap of 2mm-5mm with the inner wall of the base. When the arc-shaped petal plate rotates, its hinge end rotates 0°-60° along the hinge point within the dynamic adjustment gap.
[0018] Preferably, the hook-fitting surface of the arc-shaped hook is provided with anti-slip texture, which includes, but is not limited to, a wavy pattern.
[0019] By employing the above technical solution, this utility model provides a trash can that has at least the following beneficial effects:
[0020] When the weight inside the garbage bag reaches a certain threshold, this invention triggers an arc-shaped flap plate to automatically close the opening of the garbage bag, preventing the spread of odors, reducing the tedious operation of manual closing, and improving the convenience and hygiene of use. Attached Figure Description
[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:
[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0023] Figure 2 This is a schematic diagram of the base structure of this utility model;
[0024] Figure 3 This is a schematic diagram of the arc-shaped petal plate structure of this utility model;
[0025] Figure 4 This utility model Figure 3 A magnified structural diagram of A in the diagram.
[0026] In the diagram: 1. Base; 2. Arc-shaped petal plate; 21. Arc-shaped hook; 3. Torsion spring. Detailed Implementation
[0027] 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.
[0028] Please refer to Figures 1-4 This embodiment proposes a trash can, including:
[0029] The base 1 has multiple mounting slots at its edge;
[0030] The arc-shaped petal plate 2 is composed of at least three arc-shaped petal plates 2. In the initial state, the multiple arc-shaped petal plates 2 form a semi-circular storage cavity. The initial opening diameter of the semi-circular storage cavity does not exceed the diameter of the base 1. Each arc-shaped petal plate 2 includes:
[0031] The radially extending hinge end is hinged in the mounting groove, and the non-rotating side of the hinge end forms a mechanical limiting contact surface with the inner wall of the mounting groove.
[0032] The axially extending free end is provided with an outward arc-shaped hook 21 at the end. The hooking surface of the arc-shaped hook 21 is provided with anti-slip texture, which includes but is not limited to wavy texture.
[0033] A dynamic adjustment gap is formed between the turning side of the hinge end and the inner wall of the mounting groove. The hinge end of the arc-shaped petal plate 2 is initially set vertically in the mounting groove, and the rotating side of its hinge end forms a dynamic gap of 2mm-5mm with the inner wall of the base 1. When the arc-shaped petal plate 2 rotates, its hinge end rotates 0°-60° along the hinge point within the dynamic adjustment gap.
[0034] Torsion spring 3, multiple torsion springs 3 are respectively sleeved on the hinge end of each arc-shaped petal plate 2 and have adjustable preload;
[0035] When the weight of the garbage hanging inside the garbage bag reaches the threshold, the hinged ends of each arc-shaped petal plate 2 gradually rotate against the preload of the torsion spring 3, achieving:
[0036] The garbage bag opening gradually narrows radially;
[0037] Multiple arc-shaped hooks 21 form a closed constraint loop;
[0038] The dynamic clearance adapts and adjusts itself as the rotation angle changes.
[0039] In the initial state (garbage bag empty), the storage cavity is formed by the preload of the torsion spring 3, which keeps multiple arc-shaped petal plates 2 in an outward state, forming a semi-circular storage cavity. At this time, the hinged end is vertically fixed in the mounting groove, that is, the non-turning side is in close contact with the groove wall. The garbage bag is inserted into the storage cavity so that the arc-shaped hook 21 at the free end hooks the garbage bag. The corrugated anti-slip texture of the arc-shaped hook 21 increases the friction with the garbage bag and prevents the bag mouth from slipping off.
[0040] During the load response phase (when the garbage bag contains garbage), the trigger condition is that when the weight of the garbage reaches a threshold (e.g., 200-500g), the downward pull force F of the garbage bag overcomes the preload of the torsion spring 3, and each arc-shaped petal plate 2 rotates inward synchronously around the hinge point. The rotation angle increases with the increase of weight (limited to 0°-60°), and the dynamic gap decreases with the increase of the rotation angle to ensure smooth rotation without jamming. At the same time, the inward rotation of the arc-shaped petal plate 2 causes the opening diameter of the storage cavity to gradually decrease.
[0041] During the closing and locking phase (when the garbage bag reaches its maximum weight), as the weight of the garbage inside the bag continues to increase (e.g., ≥800g), multiple arc-shaped hooks 21 collide with each other, forming a closed loop structure. This causes the bag opening to automatically contract, preventing odor from spreading and eliminating the need for the user to manually close the bag.
[0042] During the replacement phase (old bag replaced with new one), the user lifts the garbage bag containing trash, causing the bag opening to detach from the curved hook 21. Multiple curved petal-shaped plates 2 then return to their original position via the elastic force of the torsion spring 3. The user can then easily remove the garbage bag and repeat the process to replace it with a new one.
[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A trash can, characterized in that, include: The base (1) has multiple mounting slots at its edge; Arc-shaped lobes (2), consisting of at least three arc-shaped lobes (2), each arc-shaped lobe (2) comprising: A radially extending hinged end is hinged within the mounting groove, and the non-rotating side of the hinged end forms a mechanical limiting contact surface with the inner wall of the mounting groove; The axially extending free end has an outwardly curved hook (21) at the end; A dynamic adjustment gap is formed between the turning side of the hinge end and the inner wall of the mounting groove; Torsion spring (3), multiple torsion springs (3) are respectively sleeved on the hinge ends of each arc-shaped petal plate (2) and have adjustable preload; When the weight of the garbage hanging inside the garbage bag reaches the threshold, the hinged ends of each arc-shaped petal plate (2) gradually rotate against the preload of the torsion spring (3), thus achieving: The garbage bag opening gradually narrows radially; Multiple arc-shaped hooks (21) form a closed constraint loop; The dynamic clearance adapts and adjusts itself as the rotation angle changes.
2. A trash can according to claim 1, characterized in that, The multiple arc-shaped petal plates (2) form a semi-circular storage cavity in the initial state, and the initial opening diameter of the semi-circular storage cavity does not exceed the diameter of the base (1).
3. A trash can according to claim 1, characterized in that, The hinge end of the arc-shaped petal plate (2) is initially set vertically in the mounting groove, and its hinge end rotation side forms a dynamic gap of 2mm-5mm with the inner wall of the base (1). When the arc-shaped petal plate (2) rotates, its hinge end rotates 0°-60° along the hinge point within the dynamic adjustment gap.
4. A trash can according to claim 1, characterized in that, The hook surface of the arc-shaped hook (21) is provided with anti-slip texture, which includes, but is not limited to, wavy texture.