Strain relief device for an electrical supply line
AssigneeRobert Bosch GmbH
InventorThomas Muller
Life of this patent
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Abstract
A strain relief device, especially for power tools, has a pin upon which is pivotally mounted a clamping member with a spirally curved rough clamping surface which coacts with a second clamping surface. An electrical line is inserted between these surfaces and the clamping member is swung thereby applying a clamping force to the electrical line. When strains are applied to the line, the clamping member provides an increased clamping force by swiveling so that a section of the member of larger diameter presses the line against the second clamping surface. A lock mechanism is also provided to prevent the electrical line from being pushed further into the housing.
Claims13
A strain relief device for an electrical supply line in an electrical instrument, particularly a power tool, which has a housing and an opening in the housing to admit the supply line, comprising a clamping member mounted for pivoting about a pivot axis relative to said housing and having a first clamping surface and a pivoting eye;
- a second clamping surface on said housing, wherein the supply line is adapted to be located between said first and second clamping surfaces, said clamping member being operative to apply a clamping force to said supply line when a strain force is applied to said supply line in the direction outwardly of the housing;
- and a locking mechanism operative to prevent motion of said supply line in response to a pushing force applied thereto in the direction inwardly of said housing, said locking mechanism comprising first teeth arranged on said housing so as to form a part of the same and located concentrically relative to said pivot axis of said clamping member, and at least one second teeth attached to said clamping member and engageable with said first teeth.
A strain relief device for an electrical supply line in an electrical instrument, particularly a power tool, which has a housing and an opening in the housing to admit the supply line, comprising a clamping member pivotally mounted to said housing and having a first clamping surface and a pivoting eye;
- a second clamping surface on said housing, wherein the supply line is adapted to be located between said first and second clamping surfaces, said clamping member being operative to apply a clamping force to said supply line when a strain force is applied to said supply line in the direction outwardly of the housing;
- and a locking mechanism operative to prevent motion of said supply line in response to a pushing force applied thereto in the direction inwardly of said housing;
- and a pin having an axis and detachably mounting said clamping member for pivoting relative to said housing so that said clamping member can be mounted on said housing by fitting onto said pin in one axial direction and fixing on said pin, and dismounted from said housing by releasing and removing said clamping member from said pin in another axial direction opposite to said one axial direction.
Dependencies are inferred from the claim text.