Manually operated non-return variable-caliber trash can with pullable trash bag

Abstract

A manually operated non-return type trash can with variable caliber and capable of pulling a trash bag comprises a trash body with a circular cross section, a fixed ring seat is provided at the upper end of the trash 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 long slot hole which is transparent from top to bottom is provided on the second connecting rod along the length direction, 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 tension spring is connected between the outer ends of two adjacent first connecting rods, a rotating 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 rotating non-return mechanism is provided between the rotating protective cover and the fixed ring seat. The present invention conveniently changes the caliber of the existing trash can by rotating the rotating protective cover, facilitates putting on the trash bag, and can free both hands to operate and install the trash bag, which is convenient to operate.

Description

Technical Field

[0001] The invention relates to a garbage can, in particular to a manually operated non-return type garbage can with a variable-caliber stretchable 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 in stores and supermarkets are an important source of trash bags in households. In daily life, most trash cans have fixed calibers, and the caliber of idle plastic bags must be slightly larger than the caliber of the trash cans before they can be used. If the caliber of the plastic bag in the store or supermarket is smaller than the caliber of the trash can, it is difficult to cover it on the trash can for reuse, and it can only be discarded, resulting in material waste and aggravating environmental pollution. In addition, currently few trash cans have the ability to stretch trash bags, and general trash bags are not firmly fixed on the trash cans. Therefore, developing a trash can cover with a variable caliber and the ability to stretch trash bags that can be installed on a general trash can or a trash can integrated with the trash can cover 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 a manually operated non-return variable-caliber trash can with a stretchable trash bag, 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 trash bag.

[0010] In order to solve the above technical problems, the present invention adopts the following technical scheme: a manually operated non-return variable-caliber trash can with a stretchable trash bag, 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 on 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, and a tension spring is connected between the outer ends of two adjacent first connecting rods; 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 rotating non-return mechanism is provided between the rotating protective cover and the fixed ring seat.

[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 first connecting rod is located below the ear plate, a driving shaft is fixedly arranged at the lower part of the outer end of the first connecting rod, a tension spring is arranged along the outer wall of the conical arc plate and two ends of the tension spring are respectively connected to two adjacent driving shafts.

[0013] 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, the fixed ring and the tension spring 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 a card block corresponding to the slot one by one. The upper cover shell and the lower cover shell are connected as a whole by the card block being clamped in the slot. 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 set along the radial direction of the lower cover shell, and the lower end of the drive shaft extends into and is assembled into the drive slot.

[0014] The rotation check mechanism includes an arc-shaped ratchet bar, a check pawl rod and a rotating shaft. The arc-shaped ratchet bar is fixedly arranged on the circumferential inner wall of the upper cover shell. An arc-shaped guide hole is opened on the top of the upper cover shell in the circumferential direction. A pin hole is opened on the fixed ring in the vertical direction. The rotating shaft is rotatably connected in the pin hole. The upper end of the rotating shaft passes through the arc-shaped guide hole upward and is fixedly connected to a handle located above the upper cover shell. The check pawl rod is horizontally arranged. A torsion spring is sleeved on the rotating shaft. One spring leg of the torsion spring is crimped with the check pawl rod, and the other spring leg of the torsion spring is crimped with the fixed ring. One end of the check pawl rod is fixedly connected to the rotating shaft, and the other end of the check pawl rod is engaged with the ratchet of the arc-shaped ratchet bar under the action of the torsion spring.

[0015] By adopting the above technical scheme, when the present invention is in use, the operator first rotates the rotating protective cover horizontally in the clockwise direction for a certain angle. At this time, the outer end of the non-return pawl rod and the arc-shaped ratchet bar arranged on the inner wall of the circumference of the upper cover shell are not pressed and clamped, and the driving groove in the rotating protective cover presses the driving shaft horizontally, driving the first connecting rod to rotate outward with the second pin shaft as a fulcrum, overcoming the tension of the tension spring, 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 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 caliber of the garbage bag, the rotating protective cover is released, and the outer end of the non-return pawl rod and the arc-shaped ratchet bar are connected. The ratchet of the strip is engaged to prevent it from rotating counterclockwise and resetting under the action of the tension spring. Then the operator puts the opening of the garbage bag outside all the first pin shafts with both hands, and then rotates the handle at the upper end of the rotating shaft counterclockwise to overcome the force of the torsion spring, so that the outer end of the non-return pawl rod is separated from the arc-shaped ratchet strip. Under the action of the tension spring, the driving shaft drives the rotating protective cover to rotate counterclockwise and reset, and at the same time drives the first connecting rod to rotate inward with the second pin shaft as the fulcrum. The second pin shaft at the inner end of the first connecting rod is away from the center line of the barrel body, 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 enclosed by several second connecting rods and placed into the barrel body to complete the rapid installation of the garbage bag.

[0016] The structure of the present invention has the following characteristics:

[0017] (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 tension spring is installed on the outer circumference of the upper end of the barrel body (outside of the conical arc plate), and the lever structure of the first connecting rod with the second pin as the fulcrum is used, so that a plurality of first pins can always tension the garbage bag.

[0018] (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.

[0019] (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.

[0020] (4) The rotating protective cover also serves to hide the tension spring. 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 shell and the lower cover shell, which is convenient for assembly and disassembly and is firmly fixed.

[0021] (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.

[0022] In summary, the present invention uses the principle of a lever and a 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 rotating the rotating protective cover, 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 control applied to adjust the caliber size is only to rotate the rotating protective cover. The rotating check mechanism can free up both hands to operate and install the trash bag, which is easy to operate. Finally, a tension force is applied to the trash bag by the tension spring, so that the trash bag can be firmly fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall assembly structure of the present invention;

[0024] Figure 2 is an exploded view of the present invention;

[0025] Figure 3 yes Figure 1 The structural diagram without the rotating protective cover;

[0026] Figure 4 It is a three-dimensional structural schematic diagram of the fixed ring seat;

[0027] Figure 5 is a side view of the fixed ring seat;

[0028] Figure 6 1. It is a schematic diagram of the structure of the upper cover shell of the rotating protective cover when viewed from above;

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the lower cover shell of the rotating protective cover. DETAILED DESCRIPTION

[0030] like Figure 1-Figure 7As shown, the manually operated non-return variable-caliber trash can with a stretchable trash bag 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 (four in the figure) 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 ends of the first connecting rods 3 are located inside the barrel body 1, the outer ends of the first connecting rods 3 are 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 the second connecting rods 4 are provided between the outer ends of the two adjacent first connecting rods 3. A long slot hole 5 which is transparent from top to bottom is opened on the 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 tension spring 7 is connected between the outer ends of two adjacent first connecting rods 3; a circular rotating protective cover 15 is provided on the outside of the fixed ring seat 2; the rotating protective cover 15 is transmission-connected to the outer end of the first connecting rod 3; a rotating check mechanism 21 is provided between the rotating protective cover 15 and the fixed ring seat 2.

[0031] 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 10. The lower part of the fixed ring 8 is evenly provided with conical arc plates 11 equal to the number of the ear plates 9 along the circumferential direction. The conical arc plates 11 are arranged at intervals from the ear plates 9. The upper side diameter of the conical arc plates 11 is larger than the lower side diameter. A horizontal limiting arc plate 12 is provided on the inner side of the lower side of the conical arc plate 11. The lower side of the conical arc plate 11 is downwardly provided with a plug-in arc plate 13 assembled in the upper port of the barrel body 1, and the bottom surface of the horizontal limiting arc plate 12 is in contact with the upper side of the barrel body 1.

[0032] The first connecting rod 3 is located below the ear plate 9, and a driving shaft 14 is fixedly provided at the lower outer end of the first connecting rod 3. The tension spring 7 is arranged along the outer wall of the conical arc plate 11, and the two ends of the tension spring 7 are respectively connected to two adjacent driving shafts 14.

[0033] A circular rotating protective cover 15 is provided on the outside of the fixed ring seat 2, and the outer edge of the rotating protective cover 15 covers the outer end of the first connecting rod 3 inside. The lower edge of the inner side of the rotating protective cover 15 is located above the ear plate 9. A driving groove 16 is provided inside the rotating protective cover 15, and the length direction of the driving groove 16 is set along the radial direction of the rotating protective cover 15. The upper end of the driving shaft 14 extends into and is assembled into the driving groove 16.

[0034] The inner ring of the rotating protective cover 15 is an open structure, and the outer side of the rotating protective cover 15 covers the outer end of the first connecting rod 3, the fixed ring 8 and the tension spring 7 inside; the rotating protective cover 15 includes an upper cover shell 17 and a lower cover shell 18, and the inner wall of the outer ring of the upper cover shell 17 is provided with at least three slots 19, and the outer circumferential edge of the lower cover shell 18 is provided with a block 20 corresponding to the slot 19 one by one, and the upper cover shell 17 and the lower cover shell 18 are connected as a whole by the block 20 being clamped in the slot 19, and the bottom of the lower cover shell 18 is provided with four drive grooves 16, and the four drive grooves 16 are evenly arranged along the circumferential direction of the lower cover shell 18, and the length direction of each drive groove 16 is arranged along the radial direction of the lower cover shell 18, and the lower end of the drive shaft 14 extends into and is assembled into the drive groove 16.

[0035] The rotation check mechanism 21 includes an arcuate ratchet bar 22, a check pawl rod 23 and a rotating shaft 24. The arcuate ratchet bar 22 is fixedly arranged on the circumferential inner wall of the upper cover shell 17. An arcuate guide hole 25 is opened on the top of the upper cover shell 17 in the circumferential direction. A pin hole is opened on the fixed ring 8 in the vertical direction. The rotating shaft 24 is rotatably connected in the pin hole. The upper end of the rotating shaft 24 passes through the arcuate guide hole 25 upward and is fixedly connected to a handle 26 located above the upper cover shell 17. The check pawl rod 23 is horizontally arranged. A torsion spring (not shown in the figure) is sleeved on the rotating shaft 24. One spring leg of the torsion spring is crimped with the check pawl rod 23, and the other spring leg of the torsion spring is crimped with the fixed ring 8. One end of the check pawl rod 23 is fixedly connected to the rotating shaft 24. Under the action of the torsion spring, the other end of the check pawl rod 23 is engaged with the ratchet of the arcuate ratchet bar 22.

[0036] When the present invention is in use, the operator first rotates the rotating protective cover 15 horizontally in the clockwise direction for a certain angle. At this time, the outer end of the non-return pawl rod 23 and the arc-shaped ratchet bar 22 set on the inner wall of the circumference of the upper cover shell 17 are not pressed and clamped, and the driving groove 16 in the rotating protective cover 15 presses the driving shaft 14 horizontally, driving the first connecting rod 3 to rotate outward with the second pin shaft 10 as a fulcrum, overcoming the tension of the tension spring 7, 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 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 caliber of the garbage bag, the rotating protective cover 15 is released, and the outer end of the non-return pawl rod 23 and the arc-shaped ratchet bar 2 2 is engaged with the ratchet of the tension spring 7, thereby preventing the counterclockwise rotation and reset under the action of the tension spring 7, and then the operator's hands put the opening of the garbage bag outside all the first pin shafts 6, and then rotate the handle 26 at the upper end of the rotating shaft 24 counterclockwise to overcome the force of the torsion spring, so that the outer end of the non-return pawl rod 23 is separated from the arc-shaped ratchet bar 22. Under the action of the tension spring, the driving shaft 14 drives the rotating protective cover 15 to rotate counterclockwise and reset, and at the same time drives the first connecting rod 3 to rotate inward with the second pin shaft 10 as the fulcrum, and the second pin shaft 10 at the inner end of the first connecting rod 3 is away from the center line of the barrel body 1, 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 a plurality of second connecting rods 4 and placed into the barrel body 1, completing the rapid set of the garbage bag.

[0037] 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. A manually operated non-return variable-caliber trash can with a stretchable 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 tension spring is connected between the outer ends of two adjacent first connecting rods; 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 rotating check mechanism is provided between the rotating protective cover and the fixed ring seat; 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 first connecting rod is located below the ear plate, a driving shaft is fixedly provided at the lower part of the outer end of the first connecting rod, a tension spring is arranged along the outer wall of the conical arc plate, and the two ends of the tension spring are respectively connected to two adjacent driving shafts; The inner ring of the rotating protective cover is an open structure, and the outer side of the rotating protective cover covers the outer end of the first connecting rod, the fixed ring and the tension spring inside; the rotating protective cover includes an upper cover shell and a lower cover shell, 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 a card block corresponding to the slot one by one, the upper cover shell and the lower cover shell are connected as a whole by the card block being clamped in the slot, and the bottom of the lower cover shell is provided with a driving groove having the same number as the driving shaft, and all the driving grooves are evenly arranged along the circumferential direction of the lower cover shell, and the length direction of each driving groove is arranged along the radial direction of the lower cover shell, and the lower end of the driving shaft extends into and is assembled into the driving groove; The rotation check mechanism includes an arc-shaped ratchet bar, a check pawl rod and a rotating shaft. The arc-shaped ratchet bar is fixedly arranged on the circumferential inner wall of the upper cover shell. An arc-shaped guide hole is opened on the top of the upper cover shell in the circumferential direction. A pin hole is opened on the fixed ring in the vertical direction. The rotating shaft is rotatably connected in the pin hole. The upper end of the rotating shaft passes through the arc-shaped guide hole upward and is fixedly connected to a handle located above the upper cover shell. The check pawl rod is horizontally arranged. A torsion spring is sleeved on the rotating shaft. One spring leg of the torsion spring is crimped with the check pawl rod, and the other spring leg of the torsion spring is crimped with the fixed ring. One end of the check pawl rod is fixedly connected to the rotating shaft, and the other end of the check pawl rod is engaged with the ratchet of the arc-shaped ratchet bar under the action of the torsion spring.

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