A garbage bag capacity detection mechanism and a smart garbage bin
By automatically detecting the capacity of garbage bags through a lifting screw and pressure sensor system, the problem of requiring users to manually replace garbage bags in existing garbage bins is solved, and the intelligent detection and reminder function of garbage bag capacity is realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI JIABIYI INTELLIGENT TECH CO LTD
- Filing Date
- 2025-08-25
- Publication Date
- 2026-07-03
AI Technical Summary
Existing trash cans have difficulty detecting the capacity of trash bags, requiring users to observe and manually replace them, which is not very convenient.
It adopts a lifting screw, synchronous belt and drive motor system, which compresses garbage by pressing the bar and uses pressure sensors and detectors to detect the garbage bag capacity. It combines NFC tags or magnetic switches to identify the location and is equipped with a microcontroller to provide reminders.
It enables automatic detection of garbage bag capacity without requiring users to observe the amount of garbage, thus improving ease of use.
Smart Images

Figure CN224448968U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste detection technology, specifically a waste bag capacity detection mechanism and an intelligent waste bin. Background Technology
[0002] A trash can, also known as a waste bin or garbage can, is a container for holding garbage. Most are made of metal or plastic. When in use, a plastic bag is placed inside, and when there is too much garbage, the bag can be tied up and thrown away. In the current technology, it is difficult for trash cans to detect the capacity of the garbage bag, requiring users to observe it and replace the garbage bag when it is full, which makes the convenience of use less than ideal.
[0003] For example, patent publication number CN220097371U specifically describes an intelligent trash can, relating to the field of trash can technology. It includes a trash can shell, a trash can support and limiting mechanism, a sorting and disposal driving mechanism, and a sorting and identification unit. The trash can shell comprises a housing, a top cover, and a trash disposal opening. The top and rear of the housing are open, and the top cover is detachably installed on the top of the housing. The trash disposal opening is located on the top front of the housing. The trash can support and limiting mechanism is installed inside the housing and supports at least three trash cans. The sorting and disposal driving mechanism is installed inside the top of the housing. This intelligent trash can facilitates the identification of different types of trash and then disposes it in the corresponding trash can, avoiding the misplacement of trash in the wrong type of trash can. After the trash can is full, the rolling effect of the wheels makes it easy to remove the trash from the shell, making it convenient and effortless to remove the trash. However, this type of trash can has the problem of difficulty in detecting the capacity of the trash bag, requiring the user to observe and replace the trash bag only when it is full, making its convenience less than ideal. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a garbage bag capacity detection mechanism and an intelligent garbage bin, which solves the problem that garbage bins cannot detect the capacity of garbage bags, requiring users to observe and replace the garbage bags only when they are full, making the convenience of use less than ideal.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a garbage bag capacity detection mechanism, comprising a mounting plate and multiple positioning components. Two nut seats are fixedly connected to the mounting plate, and each of the two nut seats is threadedly connected to a lifting screw. Synchronous pulleys are fixedly connected to the bottom ends of the two lifting screws, and a synchronous belt is sleeved between the two synchronous pulleys. A drive motor is fixedly connected to the bottom end of one of the lifting screws. Two pressure rods are fixedly connected to the mounting plate, and pressure sensors are installed between the two pressure rods and the mounting plate. A protective cover is fixedly connected to the top of the mounting plate, and a detector is fixedly installed inside the protective cover.
[0006] Preferably, the two nut seats are symmetrically arranged on the mounting plate, and both nut seats are detachably connected to the mounting plate by bolts, which makes it easy to install and remove the mounting plate and the nut seats.
[0007] Preferably, the two lifting screws are connected by a synchronous pulley and a synchronous belt. An idler pulley is provided on one side of the synchronous belt so that the synchronous belt can be kept taut under the action of the idler pulley, thereby enabling the two synchronous pulleys to rotate synchronously.
[0008] Preferably, the plurality of positioning elements are arranged vertically, and the plurality of positioning elements are matched with the detector, so that the detector can detect the positioning elements at different positions.
[0009] Preferably, the pressure bar is configured as an elastic bar, and two pressure bars are symmetrically arranged on the mounting plate, so that the pressure bars can be used to compress the garbage in the garbage bag to a certain extent.
[0010] A smart trash can includes a shell and a base, wherein the aforementioned capacity detection mechanism is installed inside the shell and the base.
[0011] This utility model provides a garbage bag capacity detection mechanism and an intelligent garbage bin. Compared with the prior art, it has the following advantages:
[0012] This garbage bag capacity detection mechanism and smart garbage bin use a drive motor to move a pressure rod, which compresses the garbage inside to a certain extent. A pressure sensor detects the pressure on the pressure rod, and when it can no longer compress, the detector locates the positioning part at that height to determine the garbage bag capacity. This eliminates the need for users to visually observe the amount of garbage, thus effectively improving the convenience of use. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0014] Figure 2 This is a schematic diagram of the internal structure of the present invention;
[0015] Figure 3 This is a schematic diagram of the connection structure between the two lifting screws and the mounting plate of this utility model;
[0016] Figure 4 This is a flowchart illustrating the logic judgment of the compression software of this utility model.
[0017] In the diagram: 1. Mounting plate; 2. Positioning component; 3. Nut seat; 4. Lifting screw; 5. Synchronous pulley; 6. Synchronous belt; 7. Drive motor; 8. Pressure rod; 9. Detector; 10. Protective cover; 11. Outer shell; 12. Base. Detailed Implementation
[0018] 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.
[0019] Please see Figures 1 to 4This utility model provides a technical solution: a garbage bag capacity detection mechanism and an intelligent garbage bin, including a mounting plate 1 and multiple positioning components 2. Two nut seats 3 are fixedly connected to the mounting plate 1, symmetrically arranged on the mounting plate 1, and both nut seats 3 are detachably connected to the mounting plate 1 by bolts, allowing for easy installation and removal of the mounting plate 1 and nut seats 3. Each of the two nut seats 3 has a threaded connection to a lifting screw 4, and a synchronous pulley 5 is fixedly connected to the bottom end of each of the two lifting screws 4. A synchronous belt 6 is sleeved between the two synchronous pulleys 5. The two lifting screws 4 are connected by the synchronous pulleys 5 and the synchronous belt 6. The synchronous belt 6 is connected to the drive system. An idler pulley is located on one side of the synchronous belt 6, allowing it to maintain tension and enabling the two synchronous pulleys 5 to rotate synchronously. A lifting screw 4 is fixedly connected to a drive motor 7 at its bottom. Two pressure rods 8 are fixedly connected to the mounting plate 1. The pressure rods 8 are elastic rods, allowing them to deform using their elasticity, thus facilitating pressure delivery to the pressure sensor. The two pressure rods 8 are symmetrically arranged on the mounting plate 1, enabling them to compress the garbage inside the garbage bag to a certain extent. A pressure sensor is installed between the two pressure rods 8 and the mounting plate 1. The sensor, mounting plate 1, has a protective cover 10 fixedly connected to its top. Inside the protective cover 10, a detector 9 is fixedly installed. Multiple positioning elements 2 are arranged vertically, with six positions from bottom to top indicating the degree to which waste can be compressed. For example, position 1 at the bottom can be compressed by 90%, position 2 by less, and so on, until position 6 at the top, prompting a packing operation. The multiple positioning elements 2 are matched with the detector 9, allowing the detector 9 to detect the positioning elements 2 at different positions. The multiple positioning elements 2 and the mobile detector 9 can utilize multiple NFC tags and a mobile reader. When the protective cover 10 moves, it can read NFC tags at different positions to determine the corresponding height position, thus indicating the capacity of the garbage bag. Alternatively, multiple magnetic switches and a moving permanent magnet can be used. When the moving permanent magnet approaches the magnetic switch, the springs inside the magnetic switch are magnetized and attract each other, causing the circuit to conduct and generate an electrical signal, thus determining the height position and garbage bag capacity. It is also equipped with a microcontroller that can receive pressure sensor and position signals, enabling convenient overall control. A buzzer or indicator light can be installed for reminders.
[0020] A smart trash can includes a shell 11 and a base 12, with the aforementioned capacity detection mechanism installed inside the shell 11 and the base 12.
[0021] During operation, the drive motor 7 simultaneously drives the two lifting screws 4 to rotate synchronously. The rotation of the lifting screws 4 causes the nut seat 3 to move, which in turn causes the mounting plate 1 to move downward. The downward movement of the mounting plate 1 causes the pressure rod 8 to move, thereby compressing the internal waste to a certain extent. The pressure sensor detects the pressure of the pressure rod 8. When the pressure of the pressure rod 8 reaches the preset value and the waste can no longer be compressed, the controller stops the drive motor 7. At the same time, the detector 9 locates the positioning part 2 at that height to determine the capacity of the garbage bag. This eliminates the need for the user to visually observe the amount of waste, thus effectively improving the convenience of use.
[0022] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.
Claims
1. A trash bag capacity detection mechanism characterized by: The device includes a mounting plate (1) and multiple positioning components (2). Two nut seats (3) are fixedly connected to the mounting plate (1). Lifting screws (4) are threaded inside the two nut seats (3). Synchronous pulleys (5) are fixedly connected to the bottom ends of the two lifting screws (4). A synchronous belt (6) is sleeved between the two synchronous pulleys (5). A drive motor (7) is fixedly connected to the bottom end of one of the lifting screws (4). Two pressure rods (8) are fixedly connected to the mounting plate (1). Pressure sensors are installed between the two pressure rods (8) and the mounting plate (1). A protective cover (10) is fixedly connected to the top of the mounting plate (1). A detector (9) is fixedly installed inside the protective cover (10).
2. A trash bag capacity detection mechanism according to claim 1, wherein: The two nut seats (3) are symmetrically arranged on the mounting plate (1), and both nut seats (3) are detachably connected to the mounting plate (1) by bolts.
3. A trash bag capacity detection mechanism according to claim 1, wherein: The two lifting screws (4) are connected by a synchronous pulley (5) and a synchronous belt (6), and an idler pulley is provided on one side of the synchronous belt (6).
4. The trash bag capacity detection mechanism of claim 1, wherein: The plurality of positioning elements (2) are arranged vertically and are matched with the detector (9).
5. A trash bag capacity detection mechanism according to claim 1, wherein: The pressure bar (8) is configured as an elastic bar, and two pressure bars (8) are symmetrically arranged on the mounting plate (1).
6. An intelligent garbage can, characterized in that: It includes a housing (11) and a base (12), wherein the capacity detection mechanism as described in any one of claims 1 to 5 is installed inside the housing (11) and the base (12).