CN109533713B

CN109533713B - Garbage can

Info

Publication number: CN109533713B
Application number: CN201811440101.5A
Authority: CN
Inventors: 李欣冉
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-11-29
Filing date: 2018-11-29
Publication date: 2022-03-22
Anticipated expiration: 2038-11-29
Also published as: CN109533713A

Abstract

The invention discloses a garbage can which comprises an outer box body, an inner box body, a transmission mechanism and a handle, wherein a front opening door and a rear opening door which can be opened and closed are respectively arranged on the front side and the rear side of the outer box body; the inner box body is arranged in the outer box body, two rotating shafts are respectively connected to two sides of the inner box body, one end of each rotating shaft is in rotating fit with the inner box body, and the other end of each rotating shaft is connected with the outer box body; the transmission mechanism is connected with the inner box body, a handle is externally connected with the transmission mechanism, and the transmission mechanism drives the inner box body to rotate around the rotating shaft under the driving of the handle. According to the invention, the inner box body for containing garbage is connected with the outer box body through the rotating shaft, and the inner box body is driven to rotate through the handle and the transmission mechanism, so that the inner box body can be inclined, the garbage can be dumped without taking out the inner box body, the operation is convenient, and the time and the labor are saved.

Description

Garbage can

Technical Field

The invention relates to the technical field of environmental protection, in particular to a garbage can.

Background

The dustbin is the device of depositing rubbish that people commonly used in daily life, and especially public dustbin is the indispensable public facility in public place. An existing common public dustbin comprises an outer box body and a dustbin arranged inside the outer box body, wherein a door is arranged on the outer box body, so that a cleaner can conveniently take out the dustbin to dump rubbish.

However, the public dustbin with the structure not only needs a cleaner to take out the dustbin before dumping the garbage, but also needs to place the dustbin in the dustbin again after dumping, so that the operation is complex, time and labor are wasted, and particularly after the garbage is filled in the dustbin, the weight of the public dustbin is large and exceeds the range which can be borne by manpower, and great inconvenience is caused to the cleaner to take out and dump the garbage.

Disclosure of Invention

The invention aims to provide a dustbin, which solves the problems that the existing public dustbin is complex in dumping process and inconvenient to take out and dump a dustbin.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

a trash bin, comprising: the front side and the rear side of the outer box are respectively provided with a front opening door and a rear opening door which can be opened and closed; the inner box body is arranged in the outer box body, two sides of the middle part of the inner box body are respectively connected with a rotating shaft, one end of each rotating shaft is in rotating fit with the inner box body, and the other end of each rotating shaft is connected with the outer box body; the transmission mechanism is connected with the inner box body, a handle is connected outside the transmission mechanism, and the transmission mechanism drives the inner box body to rotate around the rotating shaft under the driving of the handle.

According to the garbage can provided by the invention, the inner box body for containing garbage is connected with the outer box body through the rotating shaft, and the inner box body is driven to rotate through the handle and the transmission mechanism, so that the inner box body can be inclined, the garbage can be dumped without taking out the inner box body, the operation is convenient, and the time and the labor are saved.

In addition, the dustbin according to the above embodiment of the invention may further have the following additional technical features:

according to an example of the present invention, two side walls of the outer box are respectively provided with a first guide hole, two rotating shafts are respectively installed in the two first guide holes, and the rotating shafts can slide along a preset direction of the first guide holes; the transmission mechanism comprises a support frame, a first rotating arm, a second rotating arm and a third rotating arm; the bracket is provided with a first mounting end and a second mounting end, a preset interval is formed between the first mounting end and the second mounting end, and the distance between the first mounting end and the front opening door is smaller than the distance between the second mounting end and the front opening door; one end of the two opposite ends of the first rotating arm is hinged with the first mounting end, and the other end of the first rotating arm is connected with the second rotating arm; one end of the two opposite ends of the second rotating arm is hinged with the first rotating arm, and the other end of the second rotating arm is connected with the front side of the inner box body; one end of the opposite two ends of the third rotating arm is hinged with the second mounting end, and the other end of the third rotating arm is hinged with the left/right side wall of the inner box body; and a second guide hole is formed in the side wall, close to the transmission mechanism, of the outer box body, and one end of the handle penetrates through the second guide hole and is connected with the hinged part of the first rotating arm and the second rotating arm.

According to an example of the invention, one end of the second guide hole is connected with a limiting hole, and the handle can be in limiting fit with the limiting hole.

According to an example of the invention, a bearing is sleeved on the handle, a roller is sleeved outside the bearing, and the roller is installed in the second guide hole.

According to an example of the present invention, the upper end of the rear opening door is hinged to the outer case so that the rear opening door can rotate on the outer case; the rear opening door is locked by the switch mechanism, the rear opening door rotates relative to the outer box body, and when the inner box body rotates to a preset position, the switch mechanism releases the locking of the rear opening door and the outer box body.

According to an example of the present invention, the switch mechanism includes a first elastic member, a rack, a gear, a one-way bearing, a guide structure, a sliding member, a locking bar, a torsion spring, a second elastic member, a locking tongue, and a locking notch; one end of the two opposite ends of the first elastic piece is arranged at the bottom of the outer wall of the inner box body, and the other end of the first elastic piece is connected with the rack; the lower end of the rack is provided with a first limiting part; the guide structure is arranged on the inner wall of the rear opening door, and the sliding piece is arranged on the guide structure and can slide on the guide structure along the up-down direction; the lock rod is arranged on the sliding part and can rotate on the sliding part along the central axis of the lock rod, one end of the two opposite ends of the lock rod is provided with the one-way bearing, the gear is sleeved on the one-way bearing, and the other end of the two opposite ends of the lock rod is connected with the second elastic piece; one end of the second elastic piece is connected with the lock rod, and the other end of the second elastic piece is connected with the lock tongue; one end of the torsion spring is connected with the gear, and the other end of the torsion spring is connected with the sliding piece; the lock tongue is provided with a second limiting part, and the second limiting part is provided with a first guide surface forming an inclination angle with the horizontal line; the locking notch is arranged in the outer box body, a matching part in limit fit with the second limiting part is arranged on the lower side of the locking notch, and a second guide surface is arranged on the upper side of the locking notch; when interior box rotated to a certain position, the rack with the gear meshes mutually, along with interior box's continuation rotates, first spacing portion with the spacing cooperation of gear, the gear is overcome the torsion drive of torsional spring the locking lever rotates, makes spacing portion of second with spacing cooperation portion removes spacing cooperation, and makes the locking lever edge guide structure rises, the locking lever in-process that rises, first spigot surface is followed the second spigot surface rises, works as interior box rotates extremely when predetermineeing the position, spacing portion breaks away from the fore shaft.

According to an example of the present invention, the first elastic member and/or the second elastic member includes a spring.

According to an example of the invention, the guiding structure is a guiding groove arranged on the inner wall of the rear opening door; or the guide structure is a guide strip arranged on the inner wall of the rear opening door.

According to one example of the invention, the open end of the inner box body is provided with a sleeve, and the sleeve is in sliding fit with the opening of the inner box body.

According to an example of the invention, the box body further comprises a lifting mechanism, and the lifting mechanism is installed at the bottom of the outer box body.

Advantages of the above additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic structural diagram of a trash bin according to an embodiment of the present invention;

FIG. 2 is a schematic view (I) of the connection between the transmission mechanism and the housing of the garbage can according to the embodiment of the present invention;

FIG. 3 is a schematic view (II) of the connection between the transmission mechanism and the box body of the dustbin according to the embodiment of the invention;

FIG. 4 is a view of the switch mechanism of the embodiment of the present invention when the rear door is locked with the outer case;

FIG. 5 is a schematic structural diagram of the switch mechanism when the inner box rotates to the first position according to the embodiment of the present invention;

FIG. 6 is a schematic structural diagram of the switch mechanism when the inner box rotates between the first position and the second position according to the embodiment of the present invention;

fig. 7 is a schematic structural diagram of the switch mechanism when the inner box rotates to the second position according to the embodiment of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. an outer case; 2. an inner box body; 3. a rain shelter; 4. a front door is opened; 5. opening the door at the back; 6. a rotating shaft; 7. a first guide hole; 8. a second guide hole; 9. a support frame; 10. a first mounting end; 11. a second mounting end; 12. a first rotation arm; 13. a second rotating arm; 14. a third rotating arm; 15. a limiting hole; 16. a first elastic member; 17. a rack; 18. a gear; 19. a one-way bearing; 20. a guide structure; 21. a slider; 22. a lock lever; 23. a torsion spring; 24. a second elastic member; 25. a latch bolt; 26. locking the opening; 27. a first limiting part; 28. a second limiting part; 29. a first guide surface; 30. a second guide surface; 31. a fitting portion; 32. a handle.

Detailed description of the preferred embodiments

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1, this embodiment provides a garbage can, including outer box 1 and interior box 2, and outer box 1 top is connected with weather shed 3, and interior box 2 is installed in outer box 1, and the quantity of outer box 1 and interior box 2 of this embodiment can all be only one as shown in the figure, also can be that two outer boxes 1 are connected, respectively installs an interior box 2 in two outer boxes 1.

The front side of the outer box 1 of this embodiment is equipped with open closed front opening door 4, except front opening door 4, this embodiment still is equipped with the back opening door 5 relative with front opening door 4 at the rear side of box, design back opening door 5 is because the inventor discovers, if will realize inner box 2 at outer box 1 internal rotation, the prerequisite is that outer box 1 size is great, or back opening door 5 can open, obviously not only improve the cost with outer box 1 size increase, and occupy too big installation space, and the holding capacity to the dustbin does not increase, the best mode is to design back opening door 5 into the structure that can open and close, consequently, can not influence inner box 2 rotation in outer box 1. It should be noted that the "front" and "rear" in this embodiment refer to the front and rear positions of the trash can in normal use.

In addition to the structural change of the back opening door 5, two rotating shafts 6 are respectively connected to two sides of the middle part of the inner box body 2 in the embodiment, one end of each rotating shaft 6 is in rotating fit with the inner box body 2, and the other end of each rotating shaft 6 is connected with the outer box body 1; the transmission mechanism is connected with the inner box body 2, a handle 32 is externally connected with the transmission mechanism, and the transmission mechanism drives the inner box body 2 to rotate around the rotating shaft 6 under the driving of the handle 32.

As can be seen from the above description, the dustbin of this embodiment drives the inner box body 2 to rotate through the handle 32 and the transmission mechanism, so that the inner box body 2 can be inclined, the inner box body 2 does not need to be taken out, and the dustbin can be used for dumping garbage, and is convenient to operate, time-saving and labor-saving.

Based on above-mentioned structure, the inventor discovers again that although above-mentioned structure is compared in the dustbin of prior art and is improved to some extent on the convenience of dumping rubbish, still need consume the great physical power of sanitizer just can rotate interior box 2, therefore this embodiment still provides a drive mechanism that can be laborsaving, is convenient for more that the sanitizer rotates the box.

Referring to fig. 1, two substantially arc-shaped first guide holes 7 are respectively formed in two side walls of the outer box 1 of the present embodiment, two rotating shafts 6 are respectively installed in the two first guide holes 7, and the rotating shafts 6 can slide along a predetermined direction of the first guide holes 7.

As shown in fig. 2 and 3, the transmission mechanism of the present embodiment includes a support frame 9, a first rotating arm 12, a second rotating arm 13, and a third rotating arm 14; the support has first installation end 10 and second installation end 11, and first installation end 10 has the interval of predetermineeing with second installation end 11, and the distance that first installation end 10 opened the door 4 with the preceding is less than the distance that second installation end 11 opened the door 4 with the preceding, and first installation end 10 is located near the front side of interior box 2 promptly, and second installation end 11 is located near the rear side of interior box 2.

One end of the two opposite ends of the first rotating arm 12 is hinged with the first mounting end 10, and the other end is connected with the second rotating arm 13; one end of the two opposite ends of the second rotating arm 13 is hinged with the first rotating arm 12, and the other end is connected with the front side arm of the inner box body 2; one end of the two opposite ends of the third rotating arm 14 is hinged with the second mounting end 11, and the other end is hinged with one side wall of the inner box body 2; the side wall of the outer box 1 near the transmission mechanism is provided with a second guide hole 8 which is substantially arc-shaped, and one end of the handle 32 passes through the second guide hole 8 and is connected with the hinged part of the first rotating arm 12 and the second rotating arm 13.

When needs rotate interior box 2, cleanup crew operates handle 32 for handle 32 moves along the direction of predetermineeing of second guiding hole 8, and meanwhile, first rotor arm 12 and second rotor arm 13 all rotate backward, and the third guiding arm rotates a little backward, and pivot 6 also can slide along the direction of predetermineeing of first guiding hole 7 in addition, and then drives interior box 2 and wholly rotates the state in the picture 3 downwards, accomplishes and emptys the work. This design is based on lever principle and five-bar structure, will originally can only output the moment of torsion make interior box 2 rotate and change into and provide pulling force or thrust and make interior box 2 rotate, has improved the convenience of operation greatly, saves the cleaner physical power.

In addition, in order that the inner box body 2 will not rotate carelessly when the garbage can is in normal use, the limiting hole 15 is connected to one end of the second guide hole 8, and the handle 32 is in limiting fit with the limiting hole 15 when garbage does not need to be dumped.

Preferably, this embodiment has still cup jointed the bearing (not shown in the figure) on handle 32, and the bearing overcoat has cup jointed the gyro wheel (not shown in the figure), and the gyro wheel is installed in second guiding hole 8, and when cleaner operated handle 32, the gyro wheel was at second guiding hole 8 internal rotation, and the sliding friction who originally handle 32 and second guiding hole 8 is improved into rolling friction, the operation of being convenient for more.

Based on above-mentioned structure, the inventor finds again that owing to need open back door 5 in interior box 2 rotation process, this has increased cleanup crew's work load again undoubtedly for operating procedure is comparatively loaded down with trivial details, and if back door 5 is in the open mode all the time, obviously loses interior box 2 easily, has lost the guard action of outer box 1. Therefore, a structure capable of automatically opening the rear door 5 is required, and in order to realize the function, the prior art is mostly realized by components such as a proximity switch, an electronic lock and the like, but the cost is high, the installation on a public dustbin is obviously not suitable, electronic components are easy to break down, and the subsequent maintenance and replacement are more troublesome.

Therefore, the inventor firstly designs the rear opening door 5 to be hinged with the outer box body 1 at the upper end thereof, so that the rear opening door 5 can rotate on the outer box body 1; in addition, a switch mechanism is designed, the switch mechanism is used for locking the rotation of the rear opening door 5 relative to the outer box body 1, and when the inner box body 2 rotates to a preset position, the switch mechanism releases the locking of the rear opening door 5 and the outer box body 1.

As shown in fig. 4 to 7 (since fig. 2 and 3 are already shown, the rack 17 and the first elastic member 16 of the switching mechanism are not shown in fig. 4 to 7), the switching mechanism of the present embodiment includes the first elastic member 16, the rack 17, the gear 18, the one-way bearing 19, the guide structure 20, the slider 21, the lock lever 22, the torsion spring 23, the second elastic member 24, the latch 25, and the notch 25. Specifically, the first elastic member 16 and the second elastic member 24 of the present embodiment may be elastic members such as springs.

One of the opposite ends of the first elastic member 16 of the present embodiment is mounted at the bottom of the outer wall of the inner case 2, and the other end is connected to the rack 17, and the first elastic member 16 is configured to be elastically deformed only in a direction away from or close to the rear side wall of the inner case 2. The lower end of the rack 17 of this embodiment is provided with a first limiting portion 27 for driving the gear 18 and the lock rod 22 to move upward. The guide structure 20 of the present embodiment is mounted on the inner wall of the rear opening door 5, and the sliding member 21 is mounted on the guide structure 20 and can slide on the guide structure 20 in the up-down direction.

The lock rod 22 of the present embodiment is installed on the sliding member 21, for example, the guiding structure 20 is a guiding groove opened on the inner wall of the rear opening door 5, and further, for example, the guiding structure 20 is a guiding bar installed on the inner wall of the rear opening door 5, of course, any other guiding structure 20 known in the art can rotate on the sliding member 21 along the central axis thereof in the present embodiment, one end of the two opposite ends of the lock rod 22 is installed with a one-way bearing 19, the one-way bearing 19 is sleeved with a gear 18, and the other end of the two opposite ends of the lock rod 22 is connected with a second elastic member 24; the torsion spring 23 of the present embodiment has one end connected to the gear 18 and the other end connected to the slider 21. The reason why the one-way bearing 19 and the torsion spring 23 are designed is that when dumping garbage, the gear 18 can drive the lock rod 22 to rotate and slide upwards under the driving of the rack 17, the one-way bearing 19 is in a locking state at the moment, the gear 18 cannot rotate relative to the rack 17, and after the garbage is dumped, the rear opening door 5 resets, the rack 17 can still be connected with the gear 18 at the moment, the one-way bearing 19 is in an opening state at the moment, the gear 18 can rotate relative to the rack 17, further, the rotation of the lock rod 22 is not influenced by the rotation of the box body in the process of resetting the inner box body 2 and the rear opening door 5, the one-way bearing can reset under the action of the torsion spring 23, and further, the locking of the lock tongue 25 and the lock opening 25 is completed. Details regarding the specific operation will be described below.

The second elastic member 24 of the present embodiment has one end connected to the lock lever 22 and the other end connected to the latch 25, and the second elastic member 24 is configured to be elastically deformable only in the length direction of the lock lever 22. The lock tongue 25 is provided with a second limiting part 28, and the second limiting part 28 is provided with a first guide surface 29 forming an inclination angle with the horizontal line, i.e. the first guide surface 29 can be an inclined surface.

The fore shaft 25 of this embodiment is installed in the outer box 1, and the fore shaft 25 has the space of the above-mentioned spacing portion of spring bolt 25 of holding, and the downside of fore shaft 25 is equipped with the spacing complex cooperation portion 31 with second spacing portion 28, and the upside of fore shaft 25 is equipped with and second guiding surface 30.

The operation of the above-described switch mechanism of the present embodiment will be described in detail below:

when the dustbin is in the normal use state, the switch mechanism is in the state of fig. 4.

When the garbage needs to be dumped, the inner box body 2 is rotated to the first position in fig. 5 through the handle 32, at this time, the rack 17 is meshed with the gear 18, and the rack 17 is connected with the first elastic piece 16, so that the inner box body 2 can continue to rotate, at this time, the first elastic piece 16 is compressed, along with the continuous rotation of the inner box body 2, the rack 17 continues to move upwards, due to the locking effect of the one-way bearing 19, the gear 18 cannot rotate relative to the lock rod 22, and further the lock rod 22 is driven to rotate in the rotation process of the gear 18, so that the second limiting part 28 rotates to release the limiting matching with the matching part 31, and the first guide surface 29 originally on the lower side of the lock tongue 25 rotates to the upper side of the lock tongue 25; with the continuous rotation of the inner box 2, the rack 17 rises, the first limit portion 27 at the bottom of the rack 17 abuts against the gear 18, and drives the gear 18, the lock rod 22 and the lock tongue 25 to move upwards, as shown in fig. 6, at this time, the first guide surface 29 of the second limit portion 28 is matched with the second guide surface 30, and the first guide surface 29 rises along the second guide surface 30, so that the lock tongue 25 can be disengaged from the lock notch 25 when the inner box 2 rotates to the second position in fig. 7.

After the rubbish is dumped, the inner box body 2 is driven by the handle 32 to rotate and reset to the original position, meanwhile, the gear 18, the lock rod 22 and the bolt 25 descend to the initial position under the action of self gravity, and due to the action of the one-way bearing 19, the gear 18 can rotate relative to the lock rod 22 at the moment, so that the rack 17 drives the gear 18 to rotate, the structures such as the lock rod 22 and the like cannot be influenced, and then, due to the fact that the torsion spring 23 is elastically deformed in advance, when the gear 18 does not apply torque to the rack 17, the lock rod 22 rotates to the initial position under the action of the torsion spring 23, and further, the second limiting part 28 is enabled to rotate to the state in the figure 4.

In addition, in order to further facilitate dumping of the garbage into the garbage truck, a sleeve can be further installed at the opening end of the inner box body 2, the sleeve is in sliding fit with the opening of the inner box body 2, and the dumping range of the garbage dumping opening of the inner box body 2 is increased by the sleeve. In addition, in order to adapt to various garbage trucks, a lifting mechanism can be arranged at the bottom of the outer box body 1, and the lifting mechanism can be an existing manual lifting device or a pneumatic/hydraulic/electric lifting device. When the lifting mechanism is an electric lifting device, a solar cell can be arranged on the outer wall of the outer box body 1 so as to supply power to the electric lifting device or other electric equipment of the garbage can.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A trash bin, comprising:

the front side and the rear side of the outer box are respectively provided with a front opening door and a rear opening door which can be opened and closed;

the inner box body is arranged in the outer box body, two sides of the inner box body are respectively connected with a rotating shaft, one end of each rotating shaft is in rotating fit with the inner box body, and the other end of each rotating shaft is connected with the outer box body;

the transmission mechanism is connected with the inner box body, a handle is externally connected with the transmission mechanism, and the transmission mechanism drives the inner box body to rotate around the rotating shaft under the driving of the handle;

two side walls of the outer box body are respectively provided with a first guide hole, the two rotating shafts are respectively arranged in the two first guide holes, and the rotating shafts can slide along the preset direction of the first guide holes; the transmission mechanism comprises a support frame, a first rotating arm, a second rotating arm and a third rotating arm; the support frame is provided with a first mounting end and a second mounting end, a preset interval is formed between the first mounting end and the second mounting end, and the distance between the first mounting end and the front opening door is smaller than the distance between the second mounting end and the front opening door; one end of the two opposite ends of the first rotating arm is hinged with the first mounting end, and the other end of the first rotating arm is connected with the second rotating arm; one end of the two opposite ends of the second rotating arm is hinged with the first rotating arm, and the other end of the second rotating arm is connected with the front side of the inner box body; one end of the two opposite ends of the third rotating arm is hinged with the second mounting end, and the other end of the third rotating arm is hinged with the side wall of the inner box body; a second guide hole is formed in the side wall, close to the transmission mechanism, of the outer box body, and one end of the handle penetrates through the second guide hole and is connected with the hinged position of the first rotating arm and the second rotating arm; the upper end of the rear opening door is hinged with the outer box body, so that the rear opening door can rotate on the outer box body; the rear opening door is locked by the switch mechanism, the rear opening door rotates relative to the outer box body, and when the inner box body rotates to a preset position, the switch mechanism releases the locking of the rear opening door and the outer box body.

2. A waste bin according to claim 1 wherein a limiting hole is connected to one end of the second guide hole, and the handle is adapted to engage with the limiting hole in a limiting manner.

3. The trash bin of claim 2, wherein the handle is sleeved with a bearing, the bearing is sleeved with a roller, and the roller is mounted in the second guide hole.

4. A trash bin according to claim 1 wherein the switch mechanism includes a first resilient member, a rack, a gear, a one-way bearing, a guide structure, a slider, a locking bar, a torsion spring, a second resilient member, a locking tongue, and a locking notch; one end of the two opposite ends of the first elastic piece is arranged at the bottom of the outer wall of the inner box body, and the other end of the first elastic piece is connected with the rack; the lower end of the rack is provided with a first limiting part; the guide structure is arranged on the inner wall of the rear opening door, and the sliding piece is arranged on the guide structure and can slide on the guide structure along the up-down direction; the lock rod is arranged on the sliding part and can rotate on the sliding part along the central axis of the lock rod, one end of the two opposite ends of the lock rod is provided with the one-way bearing, the gear is sleeved on the one-way bearing, and the other end of the two opposite ends of the lock rod is connected with the second elastic piece; one end of the second elastic piece is connected with the lock rod, and the other end of the second elastic piece is connected with the lock tongue; one end of the torsion spring is connected with the gear, and the other end of the torsion spring is connected with the sliding piece; the lock tongue is provided with a second limiting part, and the second limiting part is provided with a first guide surface forming an inclination angle with the horizontal line; the locking notch is arranged in the outer box body, a matching part in limit fit with the second limiting part is arranged on the lower side of the locking notch, and a second guide surface is arranged on the upper side of the locking notch; when interior box rotated to a certain position, the rack with the gear meshes mutually, along with interior box's continuation rotates, first spacing portion with the spacing cooperation of gear, the gear is overcome the torsion drive of torsional spring the locking lever rotates, makes spacing portion of second with spacing cooperation portion removes spacing cooperation, and makes the locking lever edge guide structure rises, the locking lever in-process that rises, first spigot surface is followed the second spigot surface rises, works as interior box rotates extremely when predetermineeing the position, spacing portion breaks away from the fore shaft.

5. A waste bin according to claim 4 wherein the guide formation is a guide slot formed in the inner wall of the rear opening door; or the guide structure is a guide strip arranged on the inner wall of the rear opening door.

6. A waste bin according to any one of claims 1 to 3 wherein a sleeve is mounted to the open end of the inner bin and is a sliding fit over the open end of the inner bin.

7. A waste bin according to any one of claims 1 to 3 further including a lifting mechanism mounted to the base of the outer bin.