NZ202771A - Detachable handle and head mounting for brushes,brooms,etc. - Google Patents

Description

2 02771 - / v \ . a .

Priority Com^Lr'-D Opc-^fication Filed:R'$£ fr£>3.t>& 3 |9o Pubfioatscn Dsla; P Journal Wo: '3W iiiiiiiiiiiii E8T£6W" jP J0DECI982 Patents Form No. 5 £■*• NEW ZEALAND ' • RECEIVED PATENTS ACT 1953 COMPLETE SPECIFICATION "DETACHABLE HANDLE MOUNT FOR BROOMS OR SCRUBBING BRUSHES" -1-,-WE ROMAN DIETSCHE KG, D-7868 Todtnau/Aftersteg Federal Republic of Germany, a German company, hereby declare the invention, for which "iVve pray that a patent may be granted to me/us, and the method by which it is to be performed, to be particularly described in and by the following statement (followed by page I AO 202771 I f The invention concerns a detachable handle mounting in accordance with the primary concept of claim 1.

In a similar handle mounting a guiding and holding part connected to a handle displays projecting mounting limbs disposed in holding holes in a brush body. On the guiding and holding part, moreover, spring clips are disposed whose ends, projecting free and more or less parallel to the mounting limbs, engage with co-ordinated clamping holes in the brush body in the form of 10 clamps. Moreover, the guiding and holding part is provided with a tensioning element for tensioning the clamps into a clamping position in the clamping holes and for relieving the clamps into a release position of the guiding and holding part with respect to the body of the brush. In order to achieve reliable holding between the handle and the brush body even with the application of slight operational forces, the tensioning element is formed in this arrangement as a rocking lever abutting on the guiding and holding part, said rocking lever contacting the spring clips with eccentrically acting control 20 elements and being slewable between two end positions in which the clamps are either tensioned or relieved. This detachable handle mounting has proved extraordinarily effective in practical use; as the mounting limbs and the clamps fit into the clamping holes of the brush body with only relatively small contact surfaces, they must consist of relatively heavily loadable materials. For this reason, the clamp is usually made of stable spring wire. Moreover, this formation requires a complexity of assembly which seems in need of further simplification.

It is therefore the object of the invention to further develop such a handle mounting in such a way as to achieve a large-surface contact between the holding part and the body of the brush.

This object is achieved according to the invention by the characterising features of claim 1. By the formation, according to the invention, of the mounting parts, a large-surface and hence particularly strong connection is achieved between the holding part and the brush body. The eccentric control 39 element of the holding part is disposed completely bet- SQ 202771 ween the mounting parts, so that the holding part can be given a very attractive shape. As, in all, only three parts are present, the assembly can also be very easily effected. All three parts can be made of injection-mouldable plastic.

In the embodiment as in claim 2, the assembly is extremely simple, as the two mounting parts only need to be placed agains each other and pushed jointly into the handle after insertion of the tensioning element. This also achieves the maximum possible spacing between the tensioning point of the two mounting parts on the handle side, on the one hand, and the point facing brush body where the tensioning between the holding part and th brush body takes place. This also makes it possible to use plastics of low elasticity which are usually therefore relatively cheaper.

A particularly secure connection is achieved b stween the holding part and the brush body by the measures according to claim 1. In principle, such connections by positive engagement are of the dovetail type. A particularly advantageous structural solution for this is indicated in claim 3.

Further advantages and features of the invention will appear from the following description of two examples of embodiment with reference to the drawings. These show: Fig. 1: an example of embodiment of a handle mounting according to the invention in perspective exploded representation; Fig. 2: the handle mounting as in Fig. 1 in the relieved condition with mounted brush body in longitudinal section; Fig. 3: the handle mounting with brush body in longitudinal section in the tensioned condition; Fig. 4: another form of embodiment of a handle mounting according to the invention in side view in the relieved condition; Fig. 5: the handle mounting as in Fig. 3 in the tensioned condition in partially exploded representation and Fig. 6: a top view of the handle mounting as in Figs. 4 and 5.

At the free end of a handle 1 for a broom or scrubbing brush, in the case of the example of embodiment as in Fig. 1 tc 3, a holding part 2 is affixed and, in the case of the example of embodiment as in Figs. 4 to 6, a holding part 2* which has essentially the shape of an isosceles slightly obtuse-angled triangle. Each holding part 2 and 2' consists mainly of two SQ 202771 mounting parts 3f 4/3', 4' and a tensioning element 5.

In example of embodiment as in Figs. 1 to 3, the two mounting parts 3, 4 are approximately plate-shaped in their basic form while one of the mounting parts (3) displays a high rim 6 on the two sides extending outwards from the handle 1. Said rim is adapted on its inner side to the contour of the other mounting part 4, so that the latter is practically disposed in the other mounting part 3 in the assembled condition. On the other hand, the two edge areas 8, 9 facing a brush body 7 of a broom or scrubbing brn^h are free. On the mounting part 3 there is disposed a hollow lug 10, the outer diameter of which is adapted to the inner diameter of the tubular handle 1, so that this mounting part 3 can be secured to the handle 1 by pushing the lug 10 into the said handle. On the other mounting part 4, there is also disposed a - not necessarily hollpw - lug 11 which can be pushed into its hole 12 in lug 10 of the nounting part 3, whereby the two mounting parts 3 and 4 are interconnected firmly but slightly spreadably at right angles to the longitudinal axis 13 of the handle 1 and of the holding part 2. In their slack condition, the two mounting parts 3, 4 - Fig. 2 shows in particular - lie with their edge areas 8, 9 touching or else the latter can be pressed together.

At least in the vicinity of the edge areas 8, 9 of the mounting parts 3, 4, between them hence in them, there is fashioned a cavity 14 running transversely with respect to the longitudinal axis 13 in which a fairly long lug of non-circular cross-section is disposed to act as a control element 15. a racking lever 16 which extends through a clearance 17 in the mounting part 3 to the exterior is fitted approximately centrally and integral, with 'this control element 15. in the position shown in Fig. 2, the control element 15 is slewed so that its region of smallest diameter is between the co-ordinated contact */c^yrfaces 18, 19 of the mounting parts, 3, 4 bordering the cavity \^14 and running almost parallel to the longitudinal axis 13.

Both the mounting parts 3, 4 are in this case situated in their relieved position in which the two edge areas 8, 9 of the mounting parts 3, 4 are practically in mutual contact. In this position, illustrated in Fig. 2, the rocking lever 16 is slewed away from the mounting part 3 and hence from the handle 1. It 202771 is therefore recognisably in an open position.

In the position illustrated in Fig. 3, in which the free end of the rocking lever 16 is in contact with the co-ordinatec end of the handle 1, in which therefore the rocking lever 16 is slewed by more than 90° with respect to the position in Fig. 2, the control element 15 is slightly slewed out of its Fig. 2 position over a position of maximum distance between the two contact surfaces 18, 19. The control element 15 therefore cannot swing back into the open position illustrated in Fig. 2 as 10 a result of the tensioning force of the two mounting parts 3, 4 pressing against the control element 15. On the upper side of the brush body 7 there is formed a recess 20 like a slotted ho] adapted to the cross-section of the holding part 2 in the edge areas 8, 9 said recess displaying bead-like projections 21 projecting inwards in the region of their outer longitudinal edges with which corresponding groove-like recesses 22 are coordinated on the outer surface of each mounting part 3, 4 in the edge region 8, 9. In the relieved position of the mountinc parts 3, 4, depending on the position of the rocking lever 16 20 in Fig. 2, the holding part 2 can be introduced into the recess in the brush body 7 with the edge areas 8# 9. When the rod ing lever 16 is slewed and the mounting parts 3, 4 expand against each other at the same time as illustrated in Fig. 3, the groove-like recesses 22 come to be positioned over the projections 21, i.e. the flange-like sections 23 of the mounting parts 3, 4 bordering the recesses 22 to the edge area 8/9 plac< themselves behind the projections 21, so that the holding part 2 and hence also the handle 1 is connected completely rigidly, but also detachably, to the brush body 7. There is a large 30 contact area between the holding part 2 and the brush body 7.

The connection, on the handleside, between the two mounting parts 3, 4 should be largely play-free in order to achieve a '4^* wobble-free seating. The two mounting parts 3, 4 and naturall- f also the tensioning element consisting of the control element 3 ^5 wit.h the rocking lever 16 can both be exclusively injection mouldedfran a suitable plastic. Due to the plate-shaped formation of the mounting parts 3, 4 and the large-surface connect ion between the brush body 7 and the holding part 2 and the 39 great length of the control element 15, the surface pressures ( SO 20277 and stresses which occur are very slight. For this reason, there is no fear of the brush body 7 breaking out in the region of its recess 20. In the case of the embodiment as in Figs. 4 to 6, functionally identical and similar (at least in design) parts are marked with the same reference figures with a raised stroke in each case, so that supplementary reference may be made to the above description. The two mounting parts 3', 4' are in mutual contact all around in this example of embodiment. A half lug 101 is formed on each mounting part 31, 4'. The two lugs 10' are completed in the handle 1 to form a mounting lug. Hence the two mounting parts 3', 4' are connected to the holding part 2' directly through the handle 1.

The edge areas 81, 9' of the mounting parts 3', 4* in this embodiment are not at right angles to the longitudinal axis 13 of the handle 1, but somewhat oblique with respect thereto, as Figs. 4 and 5 show, so that the co-ordinated floor surface of the recess in the brush body can be situated in its principal plane, while the floor 24 of recess 20 in the example of embodiment shown in Figs. 1 to 3 is inclined with respect to the brush body 7 corresponding to the obliquity of the handle 1, as Figs. 2 and 3 show.

In the example of embodiment according to Figs. 4 to 6, the groove-like recess 22' does not run right around the whole of the holding part 2, but is interrupted in the central region. To ensure that, in the example of embodiment according to Figs. 4 to 6, the two mounting parts 3', 4* are held immovably against each other in their common junction plane, a cam 25 is provided on one half lug 10' and a corresponding recess 26 on the other half lug 10' in a co-ordinated position, so that positive engagement is achieved between the two parts. Naturally such cam recesses can be provided at various positions.

A substantial advantage of the embodiment according to the invention is that brush bodies 7 of scrubbers, household brooms, street brooms and the like can be fitted either at right angles or inclined with respect to the longitudinal axis with a holding part 2/2' disposed in the plane of the longitudinal axis 13 of the handle 1. While, in the case of household brooms, the arrangement of the brush body is made to be exactly at right angles to the longitudinal axis of the handle, scrubbers and SQ 202771 also street brooms are fitted inclined with respect to the longitudinal axis. The adaptation is effected in this case exclusively on the brush body side, as the slot-shaped recess is disposed either at right angles to the longitudinal axis or correspondingly inclined. This constitutes another substantial advantage of the embodiment according to the invention. 39 SQ

Claims (4)

WHAT WE CLAIM IS; 202771

1. A detachable handle mounting for brooms or scrubbing brushes or the like with a holding part connected to a handle, said holding part including a pair of mounting parts accommodated by a brush body, the mounting parts being biassed apart by a tensioning element which comprises at least one eccentrically acting control element disposed between the mounting parts and a rocking lever connected thereto and slewable between a first tension imposing position and a second relieved position.characterised in that the mounting parts are substantially planar and gripped by the handle at peif-fcs their ends remote from the brush body, said platco' being gripped over their opposite ends in a slot-like recess of the brush body,

2. A handle mounting as claimed in claim 1, characterised in that the two mounting parts are connected together by means of lug parts inserted into the handle and pressed together by the handle.

3. A handle mounting as claimed in claim 1, characterised in that bead-like projections and groove-like recesses are formed in the mounting parts mutually corresponding with and engaging positively with other like projections and recesses in the co-operating region of the slot-like recess in the brush body on expansion of the mounting parts.

4. A detachable handle mounting for brooms substantially as described herein with reference to any one of the embodiments shown in figures 1 to 6 of the accomp^Wi-P? drawings.