Electric variable-caliber garbage bin with easy-to-tension garbage bag

Abstract

An electric variable-caliber trash can with an easily stretched trash bag comprises a barrel body with a circular cross section, a fixed ring seat is provided at the upper end of the barrel body, at least three first connecting rods are hinged on the fixed ring seat, a second connecting rod is provided between the outer ends of two adjacent first connecting rods, a first pin is hinged on the inner end of the first connecting rod, the first pin passes through the long slot hole of a second connecting rod upward, the upper end of the first pin is hinged with one end of another second connecting rod, a protective cover is provided outside the fixed ring seat, the rotating protective cover is transmission-connected with the outer end of the first connecting rod, and a power driving mechanism fixedly connected to the fixed ring seat for driving the rotating protective cover to rotate is provided below the rotating protective cover. The present invention conveniently changes the caliber of the existing trash can by driving the rotating protective cover to rotate through a micro-motor, and monitors whether the trash bag is stretched and fixed firmly through an annular force sensor, the installation of the trash bag is convenient and reduces the chance of contact with the trash, and is more hygienic.

Description

Technical Field

[0001] The invention relates to a garbage can, in particular to an electric garbage can with a variable-caliber and easily stretched garbage bag. Background Art

[0002] Household trash cans generally need to be covered with trash bags before use, and a large number of idle plastic bags from stores and supermarkets are an important source of trash bags in households. Most trash cans in daily life have fixed calibers, and the caliber of idle plastic bags must be slightly larger than the caliber of the trash cans to be used. Currently, few trash cans have the ability to stretch trash bags, and general trash bags are not firmly fixed on trash cans. Therefore, developing a trash can cover with a variable caliber and the ability to stretch trash bags that can be installed on general trash cans or a trash can with the trash can cover integrated can can greatly improve the utilization rate of idle plastic bags in life and reduce environmental pollution.

[0003] The variable-caliber trash cans disclosed in patents such as CN210259762U, CN203199486U and CN210285482U can solve the problem of reusing small-caliber plastic bags to a certain extent, but the main problems of these trash cans are:

[0004] 1) The integrated design cannot fully utilize the existing trash cans;

[0005] 2) The structure of the trash can is complicated, which reduces the durability of the structure and increases the manufacturing cost of the trash can itself;

[0006] 3) The deformation of the trash can comes at the expense of the trash can body losing its sealing properties, and the sewage in the trash bag is easy to leak;

[0007] 4) The garbage bag is easily torn when the garbage can is deformed;

[0008] 5) There is no tension in the trash can, and the garbage bag can easily slide into the trash can. Summary of the invention

[0009] In order to solve the deficiencies in the prior art, the present invention provides an electric variable-caliber easy-to-tension garbage bag trash can which is easy to operate, has a split structure for easy assembly and disassembly, has good reliability, has good tension, and is not easy to tear the garbage bag.

[0010] To solve the above technical problems, the present invention adopts the following technical scheme: an electric trash can with variable-caliber easy-to-tension trash bags, comprising a barrel body with a circular cross-section and an open top, a fixed ring seat is provided at the upper end of the barrel body, at least three first connecting rods are hinged on the fixed ring seat, all the first connecting rods are horizontally arranged and evenly arranged along the center line of the barrel body, the inner end of the first connecting rod is located inside the barrel body, the outer end of the first connecting rod is located outside the barrel body, a second connecting rod is provided between the outer ends of two adjacent first connecting rods, a long slot hole that is transparent from top to bottom is opened on the second connecting rod along the length direction, a first pin is hinged at the inner end of the first connecting rod, the first pin shaft passes upward through the long slot hole of a second connecting rod, the upper end of the first pin shaft is hinged to one end of another second connecting rod, a circular rotating protective cover is provided on the outside of the fixed ring seat, the rotating protective cover is transmission-connected to the outer end of the first connecting rod, and a power driving mechanism fixedly connected to the fixed ring seat for driving the rotating protective cover to rotate is provided below the rotating protective cover.

[0011] The fixed ring seat includes a fixed circular ring, the lower part of the fixed circular ring is evenly provided with ear plates with the same number as the first connecting rod along the circumferential direction, the first connecting rod is hinged on the ear plate through a second pin shaft, the lower part of the fixed circular ring is evenly provided with conical arc plates with the same number as the ear plates along the circumferential direction, the conical arc plates are arranged at intervals from the ear plates, the upper side diameter of the conical arc plates is larger than the lower side diameter, a horizontal limiting arc plate is provided on the inner side of the lower side of the conical arc plate, the lower side of the conical arc plate is downwardly provided with a plug-in arc plate assembled in the upper port of the barrel body, and the bottom surface of the horizontal limiting arc plate is in contact with the upper side of the barrel body.

[0012] The inner ring of the rotating protective cover is an annular hollow structure, and the inner ring of the rotating protective cover is open. The outer edge of the rotating protective cover covers the outer end of the first connecting rod and the fixed ring inside; the rotating protective cover includes an upper cover shell and a lower cover shell, and the inner wall of the outer ring of the upper cover shell is provided with at least three slots, and the outer circumferential edge of the lower cover shell is provided with blocks corresponding to the slots one by one. The upper cover shell and the lower cover shell are connected as a whole by the blocks being clamped in the slots. The bottom of the lower cover shell is provided with drive slots with the same number as the drive shaft, and all the drive slots are evenly arranged along the circumferential direction of the lower cover shell, and the length direction of each drive slot is arranged along the radial direction of the lower cover shell. The first connecting rod is located below the ear plate, and a drive shaft is fixedly provided at the lower part of the outer end of the first connecting rod, and the lower end of the drive shaft extends into and is assembled into the drive slot.

[0013] The power drive mechanism includes a mounting box, a micro motor, a PLC micro controller, a rechargeable lithium battery, a touch switch, an annular force sensor, an inner gear ring and a gear. The mounting box and the micro motor are symmetrically arranged about the center line of the barrel body. The inner side surfaces of the mounting box and the micro motor are fixedly connected to the bottom surface of the conical arc plate through a connecting plate. The PLC micro controller and the rechargeable lithium battery are arranged in the mounting box. An arc guide hole is opened in the circumferential direction at the bottom of the lower cover shell. The inner gear ring is arranged on the circumferential inner wall of the upper cover shell. The main shaft of the micro motor vertically passes through the arc guide hole and extends into the rotating protective cover. The gear is installed The micro motor is mounted on the main shaft and meshes with the inner gear ring. The rechargeable lithium battery is connected to the micro motor and the PLC micro controller through wires. The touch switch is arranged on the outer side of the installation box. The annular force sensor is sleeved on the upper end of the first pin shaft. The touch switch and the annular force sensor are both connected to the PLC micro controller through a signal line. The first pin shaft is a hollow structure with a sealed upper end. The first pin shaft is radially provided with a threading hole. The first connecting rod is a hollow structure. The signal line connected to the annular force sensor passes through the threading hole and is then hidden in the rotating protective cover through the first pin shaft and the first connecting rod.

[0014] The arc center angles of the arc guide hole and the inner gear ring are both 60-90 degrees. Limit sensors are respectively arranged at both ends of the arc guide hole. The limit sensors are connected to the PLC microcontroller through data line transmission.

[0015] By adopting the above technical scheme, when the present invention is in use, the operator presses the touch switch with a finger, and the rechargeable lithium battery supplies power to the micromotor, the micromotor drives the gear to rotate, the gear drives the inner gear ring and the rotating protective cover to rotate clockwise, and the driving groove on the lower cover shell presses the driving shaft horizontally, driving the first connecting rod to rotate outward with the second pin shaft as the fulcrum, the inner end of the first connecting rod drives the second connecting rod to rotate through the first pin shaft, the first pin shaft moves in the long slot hole on the second connecting rod, and all the first pin shafts move toward the center line of the barrel body at the same time, when the regular polygon enclosed by the first pin shafts is smaller than the diameter of the garbage bag, the touch switch is pressed again, the micromotor is powered off and self-locked, and then the operator's hands put the opening of the garbage bag outside all the first pin shafts, and then the touch switch is pressed again, the micromotor is powered on and rotates in the opposite direction, the micromotor drives the gear to rotate, and the gear drives the inner gear ring and the rotating protective cover to rotate clockwise. The ring and the rotating protective cover rotate counterclockwise, and the driving groove on the lower cover shell presses the driving shaft horizontally, driving the first connecting rod to rotate outward with the second pin shaft as the fulcrum, and the inner end of the first connecting rod drives the second connecting rod to rotate through the first pin shaft, and the first pin shaft moves in the long slot hole on the second connecting rod, and all the first pin shafts move away from the center line of the barrel body at the same time, so that the garbage bag is stretched out. When the pressure of the stretched annular force sensor on the garbage bag is greater than the set value, it means that the garbage bag is tensioned, and the annular force sensor transmits a signal to the PLC microcontroller, and the PLC microcontroller sends a power-off command to the micromotor, and the micromotor is self-locking when it is powered off, maintaining the tension on the garbage bag, so that the mouth of the garbage bag is tensioned and fixed, and then the garbage bag is downward passed through the regular polygon hole enclosed by several second connecting rods and placed into the barrel body to complete the rapid set of the garbage bag.

[0016] When the touch switch is insensitive or damaged, in order to avoid damage to the first connecting rod and the second connecting rod, limit sensors are specially arranged at the two ends of the arc guide hole. When the main shaft of the micro motor touches the limit sensor, the limit sensor transmits the signal to the PLC micro controller, and the PLC micro controller sends a power-off command to the micro motor, and the micro motor is powered off and self-locked.

[0017] The structure of the present invention has the following characteristics:

[0018] (1) Taking advantage of the fact that the circumference of the connection length of all the first pins when the first connecting rod is along the radial direction of the barrel body is greater than the connection length of all the first pins when the first connecting rod is twisted to one side, a power drive mechanism is arranged on the outer circumference of the upper end of the barrel body (outside the conical arc plate), and the lever structure of the first connecting rod with the second pin as the fulcrum is utilized. The micro motor has the function of self-locking when the power is off, so that a plurality of first pins can always tension the garbage bag.

[0019] (2) The first pin at the inner end of the first connecting rod slides in the long slot hole of the second connecting rod to achieve the change of the diameter enclosed by all the first pins, thereby achieving the consistency of movement when the rotating protective cover rotates, evenly distributing the load, and improving the support strength of the garbage bag.

[0020] (3) The number of the first connecting rods and the second connecting rods is the same and they are evenly arranged along the circumferential direction. The rotating protective cover rotates to make all the first connecting rods rotate at a synchronous angle to prevent the mechanism formed by the first pin shaft and the long slot hole from getting stuck.

[0021] (4) The rotating protective cover also serves to hide the data line and the signal line. In order to enhance the strength of the rotating protective cover, reinforcing ribs are provided inside the rotating protective cover and near the driving slot. The rotating protective cover adopts a connection method of snapping and clamping the upper cover and the lower cover, which is convenient for assembly and disassembly and is firmly fixed.

[0022] (5) It is equipped with a rotation check mechanism. When the rotating protective cover rotates to the point where the regular polygon enclosed by the first pin shaft is smaller than the diameter of the garbage bag, the rotating protective cover will not reverse after the hand is released, thereby freeing both hands to operate the installation of the garbage bag.

[0023] (6) The fixed ring serves to guide the rotating protective cover to rotate in the center. The torque of the rotating protective cover is not transmitted to the trash can, so there is no need to clamp the trash can body with feet, which makes operation more convenient.

[0024] In summary, the present invention uses the principle of lever and crank connecting rod mechanism to adjust the size of the trash can mouth. The barrel body can be an existing round trash can. It only needs to set the solution of the present invention at the upper end of the barrel body to realize the installation of trash bags of different sizes, so that the trash can can be fully utilized. The present invention conveniently changes the caliber of the existing trash can by driving the rotation of the rotating protective cover by a micro motor, and monitors that the trash bag is stretched and fixed firmly through the annular force sensor, so that a plastic bag with a smaller caliber than the trash can can also be put on it and reused as a trash bag. The operator only needs to operate the touch switch by hand, which saves manpower, facilitates the installation of the trash bag, and reduces the chance of contacting the trash when installing the trash bag, which is more hygienic. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall assembly structure of the present invention;

[0026] Figure 2 is a side plan view schematic diagram of the present invention;

[0027] Figure 3 is an exploded view of the present invention;

[0028] Figure 4 yes Figure 1 The schematic diagram of the structure without the upper cover shell;

[0029] Figure 5 It is a three-dimensional structural schematic diagram of the fixed ring seat;

[0030] Figure 6 is a side view of the fixed ring seat;

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of the upper cover shell of the rotating protective cover;

[0032] Figure 8 It is a schematic diagram of the three-dimensional structure of the lower cover shell of the rotating protective cover. DETAILED DESCRIPTION

[0033] like Figure 1-Figure 8 As shown, the electric variable-caliber easy-to-tension garbage bag trash can of the present invention comprises a barrel body 1 with a circular cross-section and an open top, a fixed ring seat 2 is provided at the upper end of the barrel body 1, at least three first connecting rods 3 are hinged on the fixed ring seat 2, all the first connecting rods 3 are horizontally arranged and evenly arranged along the center line of the barrel body 1, the inner end of the first connecting rod 3 is located inside the barrel body 1, the outer end of the first connecting rod 3 is located outside the barrel body 1, a second connecting rod 4 is provided between the outer ends of two adjacent first connecting rods 3, and a long slot hole 5 that is transparent from top to bottom is opened on the second connecting rod 4 along the length direction, a first pin shaft 6 is hinged at the inner end of the first connecting rod 3, the first pin shaft 6 passes upward through the long slot hole 5 of a second connecting rod 4, the upper end of the first pin shaft 6 is hinged to one end of another second connecting rod 4, a circular ring-shaped rotating protective cover 7 is provided on the outside of the fixed ring seat 2, the rotating protective cover 7 is transmission-connected to the outer end of the first connecting rod 3, and a power driving mechanism fixedly connected to the fixed ring seat 2 for driving the rotating protective cover 7 to rotate is provided below the rotating protective cover 7.

[0034] The fixed ring seat 2 includes a fixed ring 8, and the lower part of the fixed ring 8 is evenly provided with ear plates 9 equal to the number of the first connecting rod 3 along the circumferential direction. The first connecting rod 3 is hinged on the ear plate 9 through a second pin shaft 21. The lower part of the fixed ring 8 is evenly provided with conical arc plates 10 equal to the number of the ear plates 9 along the circumferential direction. The conical arc plates 10 are arranged at intervals from the ear plates 9. The upper side diameter of the conical arc plates 10 is greater than the lower side diameter. A horizontal limiting arc plate 11 is provided on the inner side of the lower side of the conical arc plate 10. The lower side of the conical arc plate 10 is downwardly provided with a plug-in arc plate 12 assembled in the upper port of the barrel body 1, and the bottom surface of the horizontal limiting arc plate 11 is in contact with the upper side of the barrel body 1.

[0035] The annular hollow structure inside the rotating protective cover 7, the inner ring of the rotating protective cover 7 is open, and the outer side of the rotating protective cover 7 covers the outer end of the first connecting rod 3 and the fixed ring 8 inside; the rotating protective cover 7 includes an upper cover shell 13 and a lower cover shell 14, the inner wall of the outer ring of the upper cover shell 13 is provided with at least three card slots 15, and the outer circumferential edge of the lower cover shell 14 is provided with a card block 16 corresponding to the card slot 15. The upper cover shell 13 and the lower cover shell 14 are connected as a whole by the card block 16 being clamped in the card slot 15. Four drive grooves 17 are provided at the bottom of the lower cover shell 14, and the four drive grooves 17 are evenly arranged along the circumferential direction of the lower cover shell 14. The length direction of each drive groove 17 is set along the radial direction of the lower cover shell 14. The first connecting rod 3 is located below the ear plate 9, and a drive shaft 18 is fixedly provided at the lower part of the outer end of the first connecting rod 3, and the lower end of the drive shaft 18 extends into and is assembled into the drive groove 17.

[0036] The power drive mechanism includes a mounting box 19, a micro motor 20, a PLC micro controller, a rechargeable lithium battery, a touch switch, an annular force sensor, an inner gear ring 23 and a gear 24. The mounting box 19 and the micro motor 20 are symmetrically arranged about the center line of the barrel body 1. The inner side surfaces of the mounting box 19 and the micro motor 20 are fixedly connected to the bottom surface of the conical arc plate 10 through a connecting plate 25. The PLC micro controller and the rechargeable lithium battery are arranged in the mounting box 19. An arc guide hole 26 is opened at the bottom of the lower cover 14 along the circumferential direction. The inner gear ring 23 is arranged on the circumferential inner wall of the upper cover 13. The main shaft of the micro motor 20 vertically extends upward through the arc guide hole 26 and extends into the rotating In the protective cover 7, the gear 24 is installed on the main shaft of the micro motor 20 and meshes with the inner gear ring 23. The rechargeable lithium battery is connected to the micro motor 20 and the PLC micro controller through wires. The touch switch is set on the outer side of the installation box 19. The annular force sensor is sleeved on the upper end of the first pin shaft 6. The touch switch and the annular force sensor are connected to the PLC micro controller through a signal line. The first pin shaft 6 is a hollow structure with a blocked upper end. The first pin shaft 6 is radially provided with a threading hole. The first connecting rod 3 is a hollow structure. The signal line connected to the annular force sensor passes through the threading hole and then passes through the first pin shaft 6 and the first connecting rod 3 and is hidden in the rotating protective cover 7. This connection method of the signal line is not exposed to the outside, nor is it subjected to force, and also ensures the reliability of control.

[0037] The arc center angles of the arc guide hole 26 and the inner gear ring 23 are both 60-90 degrees. Limit sensors are respectively provided at both ends of the arc guide hole 26. The limit sensors are connected to the PLC microcontroller through a data line.

[0038] The PLC microcontroller, rechargeable lithium battery, touch switch, annular force sensor and limit sensor are not shown in the figure.

[0039] When the present invention is in use, the operator presses the touch switch with a finger, and the rechargeable lithium battery supplies power to the micro motor 20. The micro motor 20 drives the gear 24 to rotate, and the gear 24 drives the inner gear ring 23 and the rotating protective cover 7 to rotate clockwise. The driving groove 17 on the lower cover shell 14 presses the driving shaft 18 horizontally, driving the first connecting rod 3 to rotate outward with the second pin shaft 21 as a fulcrum. The inner end of the first connecting rod 3 drives the second connecting rod 4 to rotate through the first pin shaft 6. The first pin shaft 6 moves in the long slot hole 5 on the second connecting rod 4, and all the first pin shafts 6 move toward the center line of the barrel body 1 at the same time. When the regular polygon enclosed by the first pin shafts 6 is smaller than the diameter of the garbage bag, the touch switch is pressed again, and the micro motor 20 is powered off and self-locked. Then, the operator's hands put the opening of the garbage bag outside all the first pin shafts 6, and then press the touch switch again, the micro motor 20 is powered on and rotates in the opposite direction, and the micro motor 20 drives the gear 24 to rotate. The gear 24 drives The inner gear ring 23 and the rotating protective cover 7 rotate counterclockwise, and the driving groove 17 on the lower cover shell 14 presses the driving shaft 18 horizontally, driving the first connecting rod 3 to rotate outward with the second pin shaft 21 as the fulcrum, and the inner end of the first connecting rod 3 drives the second connecting rod 4 to rotate through the first pin shaft 6, and the first pin shaft 6 moves in the long slot hole 5 on the second connecting rod 4, and all the first pin shafts 6 move away from the center line of the barrel body 1 at the same time, so that the garbage bag is stretched. When the pressure of the stretched annular force sensor on the garbage bag is greater than the set value, it means that the garbage bag has been tensioned, and the annular force sensor transmits a signal to the PLC microcontroller, and the PLC microcontroller sends a power-off command to the micromotor 20. The micromotor 20 is self-locking when the power is off, maintaining the tension on the garbage bag, so that the mouth of the garbage bag is tensioned and fixed, and then the garbage bag is downwardly passed through the regular polygonal hole surrounded by several second connecting rods 4 and placed into the barrel body 1 to complete the rapid assembly of the garbage bag.

[0040] When the touch switch is insensitive or damaged, in order to avoid damage to the first connecting rod 3 and the second connecting rod 4, limit sensors are specially set at the two ends of the arc guide hole 26. When the main shaft of the micro motor 20 touches the limit sensor, the limit sensor transmits a signal to the PLC micro controller, and the PLC micro controller sends a power-off command to the micro motor 20, and the micro motor 20 is powered off and self-locked.

[0041] The micro motor 20, PLC micro controller, rechargeable lithium battery, touch switch, annular force sensor and limit sensor in the present invention are all existing mature technologies and can be purchased on the market, and the specific structure will not be described in detail.

[0042] The control among the PLC microcontroller, the micro motor 20, the touch switch, the annular force sensor and the limit sensor is a simple and conventional control method, and no new computer program is required.

[0043] This embodiment does not impose any formal limitation on the shape, material, structure, etc. of the present invention. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. An electric trash can with variable caliber and easy-to-tension trash bag, comprising a barrel body with a circular cross section and an open top, characterized in that: A fixed ring seat is provided at the upper end of the barrel body, and at least three first connecting rods are hinged on the fixed ring seat, all of the first connecting rods are horizontally arranged and evenly arranged along the center line of the barrel body, the inner end of the first connecting rod is located inside the barrel body, and the outer end of the first connecting rod is located outside the barrel body, and a second connecting rod is provided between the outer ends of two adjacent first connecting rods, and a long slot hole that is transparent from top to bottom is opened on the second connecting rod along the length direction, and a first pin shaft is hinged on the inner end of the first connecting rod, and the first pin shaft passes upward through the long slot hole of a second connecting rod, and the upper end of the first pin shaft is hinged to one end of another second connecting rod, and a rotating protective cover in the shape of a circular ring is provided on the outside of the fixed ring seat, and the rotating protective cover is transmission-connected to the outer end of the first connecting rod, and a power driving mechanism fixedly connected to the fixed ring seat for driving the rotating protective cover to rotate is provided below the rotating protective cover; The fixed ring seat comprises a fixed circular ring, the lower part of the fixed circular ring is evenly provided with ear plates equal to the number of the first connecting rod along the circumferential direction, the first connecting rod is hinged on the ear plates through the second pin shaft, the lower part of the fixed circular ring is evenly provided with conical arc plates equal to the number of the ear plates along the circumferential direction, the conical arc plates are arranged at intervals with the ear plates, the upper side diameter of the conical arc plates is larger than the lower side diameter, a horizontal limit arc plate is provided inside the lower side of the conical arc plate, the lower side of the conical arc plate is downwardly provided with a plug-in arc plate assembled in the upper port of the barrel body, and the bottom surface of the horizontal limit arc plate contacts the upper side of the barrel body; The inner ring of the rotating protective cover is an annular hollow structure, and the inner ring of the rotating protective cover is open. The outer edge of the rotating protective cover covers the outer end of the first connecting rod and the fixed ring inside; the rotating protective cover includes an upper cover shell and a lower cover shell, and the inner wall of the outer ring of the upper cover shell is provided with at least three slots, and the outer circumferential edge of the lower cover shell is provided with blocks corresponding to the slots one by one. The upper cover shell and the lower cover shell are connected as a whole by the blocks being clamped in the slots. The bottom of the lower cover shell is provided with drive slots with the same number as the drive shaft, and all the drive slots are evenly arranged along the circumferential direction of the lower cover shell, and the length direction of each drive slot is arranged along the radial direction of the lower cover shell. The first connecting rod is located below the ear plate, and a drive shaft is fixedly provided at the lower part of the outer end of the first connecting rod, and the lower end of the drive shaft extends into and is assembled into the drive slot.

2. The electric variable-caliber easily-tensionable garbage bag trash can according to claim 1, characterized in that: The power drive mechanism includes a mounting box, a micro motor, a PLC micro controller, a rechargeable lithium battery, a touch switch, an annular force sensor, an inner gear ring and a gear. The mounting box and the micro motor are symmetrically arranged about the center line of the barrel body. The inner side surfaces of the mounting box and the micro motor are fixedly connected to the bottom surface of the conical arc plate through a connecting plate. The PLC micro controller and the rechargeable lithium battery are arranged in the mounting box. An arc guide hole is opened in the circumferential direction at the bottom of the lower cover shell. The inner gear ring is arranged on the circumferential inner wall of the upper cover shell. The main shaft of the micro motor vertically passes through the arc guide hole and extends into the rotating protective cover. The gear is installed The micro motor is mounted on the main shaft and meshes with the inner gear ring. The rechargeable lithium battery is connected to the micro motor and the PLC micro controller through wires. The touch switch is arranged on the outer side of the installation box. The annular force sensor is sleeved on the upper end of the first pin shaft. The touch switch and the annular force sensor are both connected to the PLC micro controller through a signal line. The first pin shaft is a hollow structure with a sealed upper end. The first pin shaft is radially provided with a threading hole. The first connecting rod is a hollow structure. The signal line connected to the annular force sensor passes through the threading hole and is then hidden in the rotating protective cover through the first pin shaft and the first connecting rod.

3. The electric variable-caliber easily-tensionable garbage bag trash can according to claim 2, characterized in that: The arc center angles of the arc guide hole and the inner gear ring are both 60-90 degrees. Limit sensors are respectively arranged at both ends of the arc guide hole. The limit sensors are connected to the PLC microcontroller through data line transmission.

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