Patent Application
20190110656
This application claims priority to and takes the benefit of Great Britain Patent Application No. 1716840.2 filed on Oct. 13, 2017, the contents of which are herein incorporated by reference.
The present invention relates to a brushing device for brushing and picking up dirt.
Brooms and both powered and unpowered (push operated) sweepers are well known. Sweepers have limitations in their effectiveness, for instance around the edges and in the corners of floors. Brooms usually need complementing with a dustpan and brush for picking up brushed up dirt.
The object of the present invention is to provide an improved brushing device for brushing and picking up dust or dirt.
According to the invention there is provided a brushing device for brushing and picking up dirt, comprising:
The broom brush can be permanently exposed, at least at one side, for sweeping use. However, preferably the broom brush is arranged to be withdrawn with respect to and preferably into the brush head. This allows the broom brush, or at least its bristles, to be more effective in brushing and to be withdrawn after use, allowing the rotatable brush to reach the dirt. For extension and withdrawal of the broom brush, it is preferably connected to a grip movable axially of the handle. In the preferred embodiment, the grip is a collar provided around a socket for the handle.
Whilst the broom brush—or at least its bristles—can remain exposed, even when withdrawn; in the preferred embodiment, the bristles of the broom brush are accommodated within the brush head when withdrawn. For this, in the preferred embodiment, the brush head has a central partition and a front cover held spaced apart from each other for accommodating the broom brush.
In the nature of the device, with the rotatable brush being arranged to engage the dirt on a floor for instance, it is likely that the dirt receptacle will be above the rotatable brush. It is envisaged that it may be possible to project the dirt from the rotating brush against the broom brush for direction into the receptacle. However in the preferred embodiment, where the central partition is provided, this can be arranged to isolate the broom brush from the rotating brush, with the dirt being projected up the central partition to the receptacle. Conveniently the central partition has an over-hang for turning the dirt path to fall into the receptacle.
For assisting the upwards direction of the dirt, a lower portion of the central partition can be curved complementarily with an axis of rotation of the rotating brush. Further an opposite side of a dirt path can also be curved. This opposite side is conveniently provided on the receptacle.
To help understanding of the invention, a specific embodiment thereof will now be described by way of example and with reference to the accompanying drawings, in which:
Referring to the drawings, the brushing device comprises a handle 1 with a brush head 2 at its lower, in use, end. The carrier carries a broom brush 3, which is extensible for sweeping dust, and a rotating brush 4 for picking up swept dust for delivery to a dust receptacle 47.
The carrier 2 is a three piece injection moulding, comprised of a front cover 5, a back cover 6 and a central moulding 7. The covers are connected to the central moulding and the each other by conveniently positioned screws in integrally moulded screw bosses that do not need to be separately described, but at least some of which can be seen on the drawings. The central moulding has an upwardly open void 8 between a pair of upwardly extend, converging fingers 9, which engage in slots 10 in a tubular part 11 of a broom brush extender 12. A handle socket 13 extends through the brush extender. For moving this, it is provided with a collar 14 at the top of the tubular part above the slots. The tubular part 11 ends below the slots, whereby the fingers 9 limit the extent of upwards and downwards movement of the broom brush extender. This has a further triangular extension 15 below the tubular part, which extension is arranged within the front cover 5, where it is connected to a broom support 16. It is to the bottom of this that a broom bristle support 17 is attached. Broom bristles 18 as such extend below the bristle support.
Movement of the collar 12 up and down the handle socket retracts and extends the bristles below the bottom 19 of the front cover and indeed the bottom of the central moulding.
It will be appreciated that the handle socket 13 requires firm anchoring with respect to the three piece injection moulding. For this, it has tabs 20, fixed by screws to bosses 21 provided on the inside of the back cover 6. Further, midway along the socket, it has an aperture 22 for another boss 23. A complementary boss 24 on the front cover passes through another bore 25. The two bosses are secured together with a screw, not shown.
The broom parts also require location. The broom support has five channel-form ribs, a central one 26 and four others 27. These others receive respective ears 28 extending from the central moulding into them. The other sides of the channels are supported by the front cover against moving out of engagement with the ears. Thus the broom support 16 is free to move only longitudinally of the channels. In a position corresponding to the ears, a spring loaded detent 29 is provided engaging in the central channel 26. It has two recesses 261,262 for the detent to engage in, for the withdrawn position of the broom and for its extended, use position. The bristle support 17 is arranged between the front cover and a divider 39 of the central moulding at all times, directing the bristles downwards and in particular below the bottom cover for use.
Within the back cover 6 there is mounted an electrical motor 30 and a battery pack 31 on a ledge 32 formed as part of the central moulding. Set back from the full width of the central moulding are a pair of flanges 33 extending down from the ledge. The rotating brush 4, in the form of a drum 34 with a helical arrangement of bristles 35, is journaled on them. A tooth pulleys 36, 37 and a toothed belt 38 are provided for transferring drive from the motor 30 to the rotating brush.
A divider 39 extends between the flanges. It is generally planar, except that its bottom edge is curved 40, with a lip 41 set just above the lower extent of the bristles 35, whereby most dirt engaged by the bristles is directed by the brush up the divider. The top of the divider curves over the rotating brush as it merges with ledge 32.
At the bottom of the flanges 33, a brush roller retainer 42 is provided. It has two ends 43 which also locate a pair of floor rollers 44. These determine the height of the lip 41 and the rotating brush 4 above a floor F. A strip 45 of the retainer extends above the rotating brush.
The back cover 6 holds the brush retainer in place. It has a rectangular aperture 46 for a dirt receptacle 47. This is removable and normally retained by a magnetic catch, not shown. It is a generally rectangular trough with a larger aperture closing front 49. Its bottom and inner back 50 are curved complementarily to the bottom of the central moulding 39, to provide a smooth path for picked up dirt. This is directed into the receptacle 47 by the top curvature 51 of the divider. The inner back 50 retains the dirt in the receptacle.
In use, dirt on the floor is swept with the downwards extended broom brush. The dirt is swept into a pile as with a conventional broom. The broom brush is then withdrawn and the motor switched on with a switch 52 at the top of the handle 1 plugged into the handle socket 11. Rolling the device over the pile of dirt causes the latter to be picked up by the rotating brush and deposited in the receptacle, which can be removed for emptying, as required.
LEDs 54 are provided down the outside of the flanges 33 to remind the user to turn the device off after use. A battery charging point 55 is provided, together with a charge indicator LED 56.
It will be appreciated the device allows the functions of a broom and a dustpan-and-brush to be performed with the one device, without the need to stoop to use a dustpan.
The invention is not intended to be restricted to the details of the above described embodiment, for instance the rotating brush could have its bristles replaced by blades, partially or completely.
| Number | Date | Country | Kind |
|---|---|---|---|
| 1716840.2 | Oct 2017 | GB | national |
