Hand-actuated, multiple-function switch unit, particularly for electrical hand tolls, appliances and the like
AssigneeRobert Bosch GmbH
InventorGottfried Leibundgut
Life of this patent
Estimating the term…
Abstract
To provide for simple assembly of a multiple-function switch unit in modular form to provide (a) a basic ON-OFF function and, selectively, at least one of the functions (b) speed control; (c) overload protection; (d) forward-reverse; (e) RF interference suppression, a basic housing unit is provided in which the ON-OFF switch is enclosed, and operating control units having the respectively selected functions are provided, the switch housing unit and the operating control units being respectively formed with interengaging projection-and-recess arrangements, typically dovetail joints, to assemble and secure the separate control units to the basic switch housing and to attach these units to the switch housing and to each other.
Claims23
Multiple function, selectively combinable hand-actuated switching unit structure system, particularly for electrical hand tools, appliances and the like, to provide the functions of
- (a) ON-OFF, and, selectively, at least two of the functions of
- (b) speed control;
- (c) overload protection;
- (d) forward and reverse rotation;
- (e) radio interference (RF) interference supression,
- said switching unit comprising
- a plurality of functional circuit structure units (20, 24, 30), respectively providing said function (b) to (e);
- a separate enclosure for each respective circuit structure unit, each enclosure being formed with at least one attachment surface;
- a switch housing unit (14) having an integrated enclosure of, in plan view, essentially rectangular shape and formed with a plurality of attachment surfaces at the sides thereof for selective attachment thereto of selected ones of said structure units;
- an ON-OFF switch (S) in said housing unit (14);
- and relatively engageable and separable interengaging projection-and-recess means formed on the attachment surfaces at said sides of said switch housing unit and on the attachment surfaces of said functional circuit structure units to assemble and secure a selected one of said functional circuit structure units to the switch housing unit by matching engagment of said respective attachment surfaces and interengagement of said separable projection-and-recess means.
In a modular switch unit system wherein a switch is provided, having a switch housing (14) having an integrated enclosure which, in plan view, is of essentially rectangular shape, and formed with a plurality of attachment surfaces at the sides thereof,
- a modular component for assembly with said switch housing unit and forming a functional circuit structure unit providing the function of at least one of:
- speed control;
- overload protection;
- forward and reverse rotation of a motor;
- radio frequency (RF) interference suppression;
- said modular component having an integrated enclosure formed with at least one attachment surface;
- an interengaging projection-and-recessed means to releasably, separately connect a modular component to said switch housing unit including an interengaging projection portion and a recessed portion means, respectively, on the attachment surfaces of said switch enclosure and on the attachment surface of said modular unit enclosure, said interengaging means being complementary to each other.
Dependencies are inferred from the claim text.