| 摘要 |
A wash brush (4), which consists of a hollow shaft (1), as well as a wash head (3) removably attachable to the shaft (1) and provided with bristles (6), whereby inside the hollow shaft extends a water channel (1; 15), and a mouth (15; 15a) of the shaft opens into a connecting piece (2) coupled to the shaft, by means of which connecting piece (2) the hollow shaft (1) is removably connectable to the wash head (3), said wash head comprising a rather flat body (30), through which extends an opening (7) and said body (3) having its side opposite with respect to the shaft provided with the bristles (6). In the wash brush,
-the opening (7) in the wash head body has an inner diameter which is larger in a top section (7a) of said opening than in a bottom section (7b) of the same opening, and the body's bottom section (7b) has its inner walls (70) provided with a set of recesses (71),
-the connecting piece (2) has a set of concentric tabs (5), which are contiguous with the periphery of an annular base (50a) of a tab set (50) at regular circumferential distances from each other, whereby on an outer surface (5c) of at least one tab (5), in the proximity of a free end (5a) of the tab, there is at least one fabricated shape (52) capable of being fitted in a recess (71) of the wash head opening (7), such that between the tab set's (50) tabs (5) and the body's opening (7) can be established a form locking by means of the tabs' fabricated shapes (52) and the recesses (71) complementary thereto, and
- the tabs contiguous with the periphery of the tab set's (50) annular base (50a) have an outer diameter (D11) which is approximately equal to or slightly larger than an inner diameter (d) of the opening (7) passing through the wash head body (3; 30) in the top section (7b) of said opening (7), such that between the tabs (5) and said top section (7b) of the opening can be established a tight fit capable of producing a specific compression pressure Pg between the tabs (7) and the top section (7b) of the opening (7) for setting the tabs (5) and the opening (7) in mutual compression locking. |
