The present invention is directed to a switching device with a rotatably mounted operating element (10) and an eccentric element (12) for translating a rotational displacement (14) of the operating element (10) into a translatory displacement (16) of a switching element (18), in particular a selecto
The present invention is directed to a switching device with a rotatably mounted operating element (10) and an eccentric element (12) for translating a rotational displacement (14) of the operating element (10) into a translatory displacement (16) of a switching element (18), in particular a selector shaft of a hand-held power tool. It is provided that a shape of the eccentric element (12) differs significantly from that of a rod.
대표청구항▼
What is claimed is: 1. A switching device with a rotatably mounted operating element (10) and an eccentric element (12) for translating a rotational displacement (14) of the operating element (10) into a translatory displacement (16) of a switching element (18), wherein the switching element is in
What is claimed is: 1. A switching device with a rotatably mounted operating element (10) and an eccentric element (12) for translating a rotational displacement (14) of the operating element (10) into a translatory displacement (16) of a switching element (18), wherein the switching element is in the form of a selector shaft of a hand-held power tool, wherein a shape of the eccentric element (12) differs significantly from that of a rod as well as a circular shape, wherein the eccentric element (12) has a guide surface (24, 26) provided to convert the rotational displacement (14) using a contact point (28, 30) that travels on the guide surface (24, 26) during the rotational displacement (14), wherein the guide surface (24) is substantially parabolic in shape, and wherein a vertex of the parabolic-shaped guide surface (24) points outwardly in a radial direction. 2. The switching device as recited in claim 1, wherein the eccentric element (12) includes at least two guide surfaces (24, 26). 3. The switching device as recited in claim 1, wherein an eccentricity (22) of the contact point (28) varies by at least 10% during a switching motion. 4. The switching device as recited in claim 3, wherein an eccentricity (22) of the contact point (28) varies by at least 50% during a switching motion. 5. The switching device as recited in claim 1, characterized by a two-legged shift spring (34) which, in at least one operating configuration, contacts the eccentric element (12) at two contact points (28, 30). 6. The switching device as recited in claim 5, wherein, in at least one operating configuration, the two-legged shift spring (34) is preloaded by the eccentric element (12). 7. A hand-held power tool comprising a switching device, wherein the switching device comprises a rotatably mounted operating element (10) and an eccentric element (12) for translating a rotational displacement (14) of the operating element (10) into a translatory displacement (16) of a switching element (18) in the form of a selector shaft of a hand-held power tool, and wherein a shape of the eccentric element (12) differs significantly from that of a rod as well as from a circular shape, wherein the eccentric element (12) has a guide surface (24, 26) provided to convert the rotational displacement (14) using a contact point (28, 30) that travels on the guide surface (24, 26) during the rotational displacement (14), wherein the guide surface (24) is substantially parabolic in shape, and wherein a vertex of the parabolic-shaped guide surface (24) points outwardly in a radial direction. 8. An eccentric element (12) for translating a rotational displacement (14) of an operating element (10) of a hand-held power tool into a translatory displacement (16) of a switching element (18) of the hand-held power tool, wherein a shape of the eccentric element (12) differs significantly from that of a rod as well as a circular shape, wherein the eccentric element (12) has a guide surface (24, 26) provided to convert the rotational displacement (814) using a contact point (28, 30) that travels on the guide surface (24, 26) during the rotational displacement (814), wherein the guide surface (24) is substantially parabolic in shape, and wherein a vertex of the parabolic-shaped guide surface (24) points outwardly in a radial direction.
Frauhammer,Karl; Meixner,Gerhard; Schnerring,Heinz; Braun,Willy; Kuhnle,Axel, Drilling hammer having an external mechanism for selectively switching operation between impact drilling and chiseling modes.
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