CN216425606U - Cleaning assembly and garbage can - Google Patents

Abstract

The application is suitable for the clean technical field of house, provides a clean subassembly and garbage bin, clean subassembly includes: the dustpan comprises a body and a first cover body, wherein the body is provided with a waste discharge port, and the first cover body is used for opening or closing the waste discharge port; the garbage can comprises a can body with a can opening and a second cover body which is movably arranged on the can body and is used for opening or closing the can opening; the opening and closing driving part is arranged between the garbage can and the dustpan, and when the dustpan is positioned on the bung hole and abutted against the can body, the opening and closing driving part can drive the first cover body to be opened, and the first cover body pushes the second cover body to be opened, so that garbage enters the garbage can from the waste discharge hole. In the use process of a user, the opening of a waste discharge port of the dustpan and the opening of the garbage can are not required to be operated respectively, the driving of the opening and closing driving part is used for realizing the double opening operation of the dustpan and the garbage can in one step, the difficulty in dumping garbage is reduced, and the garbage is prevented from being dumped out of the garbage can.

Description

Cleaning assembly and garbage can

Technical Field

The application belongs to the technical field of house cleaning, and more specifically relates to a clean subassembly and garbage bin.

Background

Along with the development of society, people have higher and higher requirements on the management of daily health, when cleaning rubbish, can generally use the dustpan and the garbage bin in a matched manner, collect the rubbish that the broom cleaned through the dustpan, pour rubbish into the garbage bin again. However, there are some problems in this process, for example, when the dustpan dumps the garbage into the garbage can, the dustpan often needs to be rotated and tilted to be at a certain angle, so that the garbage can be dumped, and moreover, the garbage can often has a can cover, so that it is difficult to open the can cover while controlling the dustpan, and the problem of dumping the garbage often occurs in this process, and secondary cleaning is needed, so that the cleaning efficiency and the cleaning degree are greatly affected.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of this application is to provide a garbage bin and clean subassembly, aim at solving the technical problem who easily takes place rubbish and topple over when empting rubbish to the garbage bin through the dustpan among the prior art.

To achieve the above object, according to one aspect of the present application, there is provided a cleaning assembly including: the dustpan comprises a body and a first cover body, wherein the body is provided with a waste discharge port, and the first cover body is used for opening or closing the waste discharge port; the garbage can comprises a can body with a can opening and a second cover body which is movably arranged on the can body and is used for opening or closing the can opening; the opening and closing driving part is arranged between the garbage can and the dustpan, and when the dustpan is positioned on the bung hole and abutted against the can body, the opening and closing driving part can drive the first cover body to be opened, and the first cover body pushes the second cover body to be opened, so that garbage enters the garbage can from the waste discharge hole.

Alternatively, the opening and closing driving part moves the first cover body by an abutting force of the dustpan and the barrel body to open the waste discharge port.

Optionally, the first cover body is arranged on the body in a reversible manner, the opening and closing driving portion comprises a driving convex portion arranged at one end of the outer side wall of the first cover body, the barrel body pushes one end of the first cover body into the dustpan through the driving convex portion, and the other end of the first cover body is turned over towards the outside of the dustpan to open the waste discharge port.

Optionally, the first cover body includes two side-by-side covers, the driving protrusion is disposed at an outer end of each first cover body, and an upper edge of the barrel body abuts against the first cover body through the driving protrusion, so that inner ends of the two first cover bodies are unfolded.

Optionally, a positioning groove for the driving protrusion to abut into is arranged on the barrel body.

Optionally, a first elastic reset piece is arranged between the first cover body and the body, and the first elastic reset piece is used for resetting the first cover body to close the waste discharge port when the dustpan is not abutted against the barrel body.

Optionally, the trash can further comprises a frame cover detachably mounted on the opening, the frame cover is provided with an opening on the inner side, and the second cover body is mounted in the opening in a turnover mode.

Optionally, the dustpan further comprises a rod body, the body is arranged at the bottom of the rod body in a turnover mode, and a containing opening is formed in the body and is opposite to the waste discharge opening.

Optionally, a second elastic resetting member is disposed between the second cover and the bezel, and the second elastic resetting member is used for resetting the second cover to close the opening when the first cover and the second cover are not abutted against each other.

According to another aspect of the present application, a trash can is provided, which includes a can body having a can opening and a cover assembly, the cover assembly includes a frame cover and a second cover, the frame cover has an opening on an inner side, the frame cover is detachably mounted on the can opening of the can body, the second cover is mounted on the frame cover in a downward-turnable manner, or the second cover is mounted on the frame cover in a laterally-slidable manner.

Optionally, the second cover body is mounted to the bezel in a downwardly-turnable manner, the second cover body includes two second cover bodies arranged in parallel, and inner ends of the two second cover bodies can be mutually unfolded.

The application provides a cleaning assembly's beneficial effect lies in: compared with the prior art, cleaning device's dustpan in this application has included the drive division that opens and shuts, the drive division that opens and shuts sets up between garbage bin and dustpan, when the dustpan is located the bung hole and with staving looks butt, the drive division that opens and shuts can drive first lid and open, and the second lid that can promote on the garbage bin at the opening in-process of first lid is opened, so that rubbish gets into the garbage bin from the refuse discharge mouth, in the user's use, need not to operate opening of the refuse discharge mouth of dustpan and opening of garbage bin respectively, drive through the drive division that opens and shuts, realized that a step just can accomplish the dual operation of opening of dustpan and garbage bin, the degree of difficulty when having reduced dumping rubbish, avoid rubbish to spill outside the garbage bin.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural view of a dustpan of a cleaning assembly provided in an embodiment of the present application in a state where the dustpan is separated from a garbage can;

fig. 2 is a schematic structural view of a dustpan of a cleaning assembly provided in the embodiment of the present application in a state of being engaged with a trash can;

FIG. 3 is a schematic structural view of the dustpan of the cleaning assembly according to the embodiment of the present disclosure in a state of being engaged with the bezel;

fig. 4 is a schematic structural view of a dustpan of a cleaning assembly provided in an embodiment of the present application, with a first cover in an open state;

fig. 5 is a schematic structural diagram of a garbage can of the cleaning assembly according to an embodiment of the present disclosure, in which a second cover is in an open state;

fig. 6 is a schematic structural view illustrating a second cover of a bezel of a cleaning assembly according to an embodiment of the present application in an open state;

reference numerals referred to in the above figures are detailed below:

10. a barrel body; 11. a bung; 20. a dustpan; 21. a waste discharge port; 22. a first cover body; 23. a drive boss; 24. a receiving opening; 25. a rod body; 30. a cover assembly; 31. a frame cover; 311. positioning a groove; 32. a second cover body.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. The embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

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 application, "a plurality" means two or more unless specifically limited otherwise.

As mentioned in the background art, at present, with the development of society, people have higher and higher requirements for daily hygiene, when cleaning garbage, a dustpan and a garbage can are usually used in combination, and the garbage cleaned by a broom is collected by the dustpan and then poured into the garbage can. However, there are some problems in this process, for example, when the dustpan dumps the garbage into the garbage can, the dustpan often needs to be rotated and tilted to be at a certain angle, so that the garbage can be dumped, and moreover, the garbage can often has a can cover, so that it is difficult to open the can cover while controlling the dustpan, and the problem of dumping the garbage often occurs in this process, and secondary cleaning is needed, so that the cleaning efficiency and the cleaning degree are greatly affected.

Referring to fig. 1 to 6, in order to solve the above problems, according to an aspect of the present application, an embodiment of the present application provides a cleaning assembly, the cleaning assembly of the present embodiment includes a dustpan 20, a garbage can, and an opening and closing driving portion, the dustpan 20 includes a body and a first cover 22, the body is provided with a waste discharge opening 21, and the first cover 22 is used for opening or closing the waste discharge opening 21; the garbage can comprises a can body 10 with a can opening 11 and a second cover body 32 which is movably arranged on the can body 10 and is used for opening or closing the can opening 11; the opening and closing driving part is disposed between the garbage can and the dustpan 20, and when the dustpan 20 is located on the opening 11 and abuts against the can body 10, the opening and closing driving part can drive the first cover 22 to open, and the first cover 22 pushes the second cover 32 to open, so that garbage enters the garbage can from the waste discharge opening 21. The dustpan 20 of the cleaning device comprises the opening and closing driving portion, the opening and closing driving portion is arranged between the garbage can and the dustpan 20, when the dustpan 20 is located on the bin opening 11 and is abutted to the bin body 10, the opening and closing driving portion can drive the first cover body 22 to be opened, and the second cover body 32 on the garbage can be pushed to be opened in the opening process of the first cover body 22, so that garbage enters the garbage can from the waste discharge opening 21, in the use process of a user, the opening of the waste discharge opening 21 of the dustpan 20 and the opening of the garbage can are not required to be operated respectively, the double opening operation of the dustpan 20 and the garbage can be completed in one step through the driving of the opening and closing driving portion, the difficulty in dumping the garbage is reduced, and the garbage is prevented from being dumped outside the garbage can.

In one embodiment, the opening and closing driving part in this embodiment moves the first cover 22 by the abutting force of the dustpan 20 and the tub 10 to open the waste discharge port 21. In this embodiment, when the dustpan 20 is located on the opening 11 and abuts against the barrel 10, the opening 11 will apply an external force to the first cover 22, and as the dustpan 20 continues to move, the opening 11 will continue to push the first cover 22 to open. The first cover 22 may be opened by sliding or turning.

In other embodiments, the first cover 22 can be opened by a motor, in this embodiment, the dustpan 20 further includes a driving motor, an output end of the driving motor is connected to the first cover 22 for driving the first cover 22 to turn or slide, wherein a marking device, such as a magnetic sheet, is disposed at the bung 11 in this embodiment, the dustpan 20 is provided with an identification device, when the dustpan 20 is located on the bung 11 and abuts against the barrel 10, the identification device identifies the magnetic sheet, and then the driving motor is controlled by the control board to drive the first cover 22 to open, and when the identification device does not identify the magnetic sheet, the control board controls the driving motor to turn reversely to close the first cover 22.

Referring to fig. 1, in the embodiment that the first cover 22 is in the flip-open mode, the first cover 22 in this embodiment is disposed on the main body in a reversible manner, the opening/closing driving portion includes a driving protrusion 23 disposed on one end of the outer side wall of the first cover 22, the barrel 10 pushes one end of the first cover 22 into the dustpan 20 through the driving protrusion 23, and the other end of the first cover 22 is flipped over toward the dustpan 20 to open the waste discharge opening 21. When the dustpan 20 is located on the bung 11 and abuts against the barrel 10, the bung 11 abuts against the driving protrusion 23, and an external force is applied to the driving protrusion 23, and as the dustpan 20 continues to move, the bung 11 continues to push the driving protrusion 23, so that the first cover 22 is further turned open.

Since the first cover 22 is opened in a flip-open manner, the volume of the garbage in the bin 10 is affected by an excessive flip stroke of the first cover 22. Specifically, once the garbage in the bin body 10 is too much, the first cover 22 is stopped by the garbage in the bin body 10 during the process of turning over, and thus cannot be smoothly opened, and at this time, the size of the first cover 22 needs to be small enough to enable more garbage in the bin body 10 to be filled, for this reason, the first cover 22 in this embodiment includes two side-by-side covers, the driving protrusion 23 is disposed at the outer end of each first cover 22, and the upper edge of the bin body 10 abuts against the first cover 22 through the driving protrusion 23, so that the inner ends of the two first covers 22 are mutually unfolded. By arranging the first cover 22 to be two, the size of each first cover 22 is reduced on the premise that the first cover 22 closes the waste discharge port 21 of the dustpan 20, so that in the process that the first cover 22 is turned downwards to be opened, the stroke of the first cover 22 is very small, and therefore the first cover is not stopped by garbage in the barrel 10, and the garbage capacity of the barrel 10 is ensured.

Similarly, since the opening process of the first cover 22 in the present application can push the second cover 32 to open, in the embodiment that the first cover 22 is in the flip-open mode, the second cover 32 can also be disposed at the bung 11 in a flip-open mode, and in the process that the first cover 22 is flipped downward, the second cover 32 is pushed to also be flipped downward, and if the flip-open stroke of the second cover 32 is too large, the volume of the garbage in the bucket 10 can also be affected. For this reason, the second lid 32 in this embodiment includes two lids arranged side by side, and inner ends of the two second lids 32 can be spread apart from each other. Through setting up first lid 22 to two of run-on, satisfying second lid 32 and closing under the prerequisite of bung hole 11, reduced the size of every second lid 32, at the in-process that second lid 32 overturned down and opened like this, the stroke of second lid 32 will be very little to can not be by the rubbish backstop in the staving 10, guaranteed the rubbish capacity of staving 10.

Referring to fig. 5, since the user often holds the lever 25 of the dustpan 20 while operating the dustpan 20, the lever 25 is often long, and it is difficult for the user to determine the position of the driving protrusion 23 so that the driving protrusion can accurately abut against the edge of the bung 11, for this reason, the positioning groove 311 for the driving protrusion 23 to abut into is provided on the barrel body 10 in this embodiment. When a user needs to pour garbage into the bucket body 10, in the process of abutting the dustpan 20 on the bung hole 11, the position of the driving convex portion 23 can be determined through the matching of the positioning groove 311 and the driving convex portion 23, and when the positioning groove 311 moves by the driving convex portion 23, the user can obviously feel different hand feeling from that of the driving convex portion 23 in other areas of the bung hole 11, so that the position of the driving convex portion 23 can be accurately determined, and the dustpan 20 is pressed down to enable the driving convex portion 23 to drive the first cover 22 to be opened.

Because the first lid 22 of this application mainly plays the effect of closing and opening waste discharge opening 21, accomodate the in-process of rubbish at dustpan 20, first lid 22 need keep closing waste discharge opening 21's state, just so can prevent that the rubbish that dustpan 20 received from discharging in waste discharge opening 21, equally, after dustpan 20 opened waste discharge opening 21 to the garbage bin discharge rubbish through first lid 22, also need first lid 22 can resume closed state the very first time to carry out rubbish on next step and collect. For this, a first elastic restoring member is provided between the first cover 22 and the body in this embodiment, and the first elastic restoring member is used for restoring the first cover 22 to close the waste discharge opening 21 when the dustpan 20 is not interfered with the bucket body 10. In the process of storing the garbage in the dustpan 20, the first elastic restoring member applies elastic force to the first cover 22 to keep the first cover in a state of closing the waste discharge opening 21, so as to prevent the garbage received in the dustpan 20 from being discharged from the waste discharge opening 21. When the dustpan 20 opens the waste discharge opening 21 through the first cover body 22, the first elastic reset piece is elastically compressed and deformed, and after the dustpan 20 is far away from the garbage can, the driving convex part 23 is no longer subjected to external force from the bin opening 11, the first elastic reset piece is reset, and elastic force is applied to the first cover body 22, so that the first cover body can be restored to a closed state at the first time, and garbage collection on the next step is performed.

When the garbage bag in the garbage can needs to be taken out, if the garbage in the garbage bag is too much, the garbage bag is difficult to take out through the bin mouth 11 opened by the second cover body 32, for this reason, the garbage can of the cleaning assembly of the present application can realize taking out the garbage bag in a larger space besides opening the bin mouth 11 through the second cover body 32, specifically, the garbage can in the present embodiment further comprises a frame cover 31 detachably mounted on the bin mouth 11, an opening is formed in the inner side of the frame cover 31, and the second cover body 32 is rotatably mounted in the opening. When the garbage bag has too much garbage to be taken out by opening the second lid 32, the user can detach the entire lid 31, so that the garbage bag can be directly taken out from the tub 10. Set up the user of also being convenient for of detachably installing the framed cover 31 on bung hole 11 and clear up 10 insides of staving, when the live time overlength of garbage bin, will breed the bacterium, the user can regularly take off framed cover 31, carries out thorough clearance to 10 insides of staving, prevents that the bacterium from breeding and peculiar smell.

Because dustpan 20 is when collecting rubbish, the bin port 24 of needs dustpan 20 aims at rubbish, and when needs cooperate the garbage bin of this application to use, still need the mouth of wasting discharge 21 of dustpan 20 to aim at the bung hole 11 of garbage bin, for this reason, dustpan 20 in this embodiment still includes the body of rod 25, the body can install in the bottom of the body of rod 25 with overturning, be provided with bin port 24 on the body, bin port 24 sets up with wasting discharge 21 relatively, the upset body can make bin port 24 towards waiting to clean regional or the bung hole 11 of garbage bin. When clearing up rubbish, the user can aim at rubbish with the mouth 24 of accomodating of body, when accomodating rubbish and accomplishing the back, can overturn the relative body of rod 25 rotation of body, makes the mouth of wasting discharge 21 aim at bung hole 11, accomplishes the operation that first lid 22 opened.

Since the second lid 32 of the present application mainly plays a role in closing and opening the bung 11, before the second lid 32 is opened by the dustpan 20, the second lid 32 needs to be kept in a state of closing the bung 11 to prevent the garbage from spilling and the odor from drifting out, and after the dustpan 20 opens the second lid 32 by the first lid 22, the second lid 32 also needs to be able to be restored to a closed state in the first time, so as to ensure that the bung 11 is kept airtight when the bung 11 does not need to be filled with garbage. Therefore, in the present embodiment, a second elastic reset element is disposed between the second cover 32 and the bezel 31, and the second elastic reset element is used for resetting the second cover 32 to close the opening when the first cover 22 and the second cover 32 are not abutted. When the dustpan 20 is opened by the first cover 22 and the second cover 32 is opened, the second elastic reset piece is elastically compressed and deformed, and when the dustpan 20 is far away from the garbage can, the first cover 22 does not apply pressure to the second cover 32, the second elastic reset piece is reset, and elastic force is applied to the second cover 32, so that the second cover can be restored to a closed state at the first time and is kept airtight.

Wherein, first elasticity in this application returns piece and second elasticity and returns the piece and preferably the torsional spring, of course can also adopt spring etc. according to concrete structure.

According to another aspect of the present application, a trash can is provided, the trash can of the present embodiment includes a can body 10 having a can opening 11 and a cover assembly 30, the cover assembly 30 includes a frame cover 31 and a second cover 32, an opening is formed inside the frame cover 31, the frame cover 31 is detachably mounted on the can opening 11 of the can body 10, the second cover 32 is mounted on the frame cover 31 in a downward-turnable manner, or the second cover 32 is mounted on the frame cover 31 in a laterally-slidable manner, on one hand, a user can detach the whole frame cover 31, so that a trash bag can be directly taken out from the interior of the can body 10. When the service life of garbage bin overlength, will breed the bacterium, the user can regularly take off the framed cover 31, carries out thorough clearance to staving 10 insides, prevents that the bacterium from breeding and peculiar smell. On the other hand, the second cover body 32 is turned downwards or transversely slides, so that the occupied space of the upper part of the garbage can in the use process of the garbage can be reduced, and the garbage can be placed more flexibly.

In this embodiment, the second cover 32 of the trash can is mounted on the frame cover in a downward-turning manner, the second cover includes two second covers arranged in parallel, and the inner ends of the two second covers 32 can be unfolded. Through setting up first lid 22 to two of run-on, satisfying second lid 32 and closing under the prerequisite of bung hole 11, reduced the size of every second lid 32, at the in-process that second lid 32 overturned down and opened like this, the stroke of second lid 32 will be very little to can not be by the rubbish backstop in the staving 10, guaranteed the rubbish capacity of staving 10.

In summary, the cleaning assembly and the garbage can provided by the embodiment at least have the following beneficial technical effects: the dustpan of the cleaning device comprises the opening and closing driving portion, the opening and closing driving portion is arranged between the garbage can and the dustpan, the dustpan is located on the bucket opening and abutted to the can body, the opening and closing driving portion can drive the first cover body to be opened, and the second cover body on the garbage can be pushed to be opened in the opening process of the first cover body, so that garbage can enter the garbage can from the waste discharge opening.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims (11)

1. A cleaning assembly, comprising:

the dustpan (20), the dustpan (20) includes a body and a first cover body (22), the body is provided with a waste discharge port (21), and the first cover body (22) is used for opening or closing the waste discharge port (21);

the garbage can comprises a can body (10) with a can opening (11) and a second cover body (32) which is movably arranged on the can body (10) and is used for opening or closing the can opening (11);

the opening and closing driving part is arranged between the garbage can and the dustpan (20), when the dustpan (20) is positioned on the bung hole (11) and is abutted against the can body (10), the opening and closing driving part can drive the first cover body (22) to be opened, and the first cover body (22) pushes the second cover body (32) to be opened, so that garbage enters the garbage can from the waste discharge hole (21).

2. The cleaning assembly according to claim 1, wherein the opening and closing driving part moves the first cover (22) by an abutting force of the dustpan to the tub (10) to open the waste discharge port (21).

3. The cleaning assembly according to claim 1, wherein the first cover (22) is provided on the main body in a reversible manner, the opening/closing driving portion includes a driving protrusion (23) provided at one end of an outer sidewall of the first cover (22), the tub body (10) pushes one end of the first cover (22) into a dustpan through the driving protrusion (23), and the other end of the first cover (22) is turned over out of the dustpan to open the waste discharge opening (21).

4. The cleaning assembly according to claim 3, wherein the first cover (22) comprises two juxtaposed covers, the driving protrusion (23) is provided at an outer end of each first cover (22), and an upper edge of the tub (10) abuts the first covers (22) through the driving protrusion (23) so that inner ends of the two first covers (22) are spread apart from each other.

5. A cleaning assembly according to claim 3, characterized in that the tub (10) is provided with a positioning slot (311) for the driving protrusion (23) to abut against.

6. The cleaning assembly according to any one of claims 1 to 5, wherein a first elastic restoring member is provided between the first cover (22) and the body, the first elastic restoring member being configured to restore the first cover (22) to close the waste discharge opening (21) when the dustpan is not interfered with the tub (10).

7. The cleaning assembly of claim 1, wherein the trash can further comprises a frame cover (31) detachably mounted on the opening (11), the frame cover (31) has an opening inside, and the second cover body (32) is reversibly mounted in the opening.

8. The cleaning assembly according to any one of claims 1-5, wherein the dustpan (20) further comprises a rod body (25), the body is rotatably mounted at the bottom of the rod body (25), and a receiving opening (24) is formed in the body, and the receiving opening (24) is arranged opposite to the waste discharge opening (21).

9. A cleaning assembly according to claim 7, characterized in that a second elastic restoring member is provided between the second cover (32) and the bezel (31), for restoring the second cover (32) to close the opening when the first cover (22) and the second cover (32) are not abutted.

10. A trash can is characterized by comprising a can body (10) with a can opening (11) and a cover body assembly (30), wherein the cover body assembly (30) comprises a frame cover (31) and a second cover body (32), an opening is formed in the inner side of the frame cover (31), the frame cover (31) is detachably mounted on the can opening (11) of the can body (10), the second cover body (32) can be mounted on the frame cover (31) in a downward turnover mode, or the second cover body (32) can be mounted on the frame cover (31) in a transverse sliding mode.

11. A waste bin according to claim 10, wherein the second cover (32) is mounted to the frame cover (31) so as to be downwardly reversible, and the second cover (32) comprises two juxtaposed covers (32), and inner ends of the two covers (32) are mutually deployable.

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