Wire bending spring and a fastener driving tool with the same
AssigneePao Shen Enterprises Co., Ltd.
InventorTsung-Wen HUANG
Life of this patent
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Abstract
A fastener driving tool includes a magazine unit, a handle, a striking plate, an energy restoring member and a wire bending spring disposed to a housing unit. The housing unit includes an inner housing assembly made from a plastic material, and an outer housing assembly made from a metal material and covering the inner housing assembly. The wire bending spring is biased for storing a striking energy for the striking plate, and includes an extending section and a backwinding section. The extending section has first and second ends. The backwinding section is connected with the second end, and extends and bends toward the first end to terminate at a terminal end portion. The ratio of a height to a width ranges from 1:1 to 1:1.6.
Claims8
A wire bending spring mountable on a fastener driving tool to be biased for storing a striking energy in an up-and-down direction, comprising:
- an extending section extending along an axis to have a first end and a second end opposite to each other along the axis;
- and
- a backwinding section having a connected end portion which is connected with said second end, said backwinding section extending and bending from said connected end portion toward said first end to terminate at a terminal end portion,
- said wire bending spring having a cross-section which defines a width perpendicular to both the axis and the up-and-down direction, and a height perpendicular to the axis and parallel to the up-and-down direction, the ratio of the height to the width ranging from 1:1 to 1:1.6.
A fastener driving tool comprising:
- a housing unit including an inner housing assembly which is made from a plastic material and defines an accommodation space therein, and an outer housing assembly which is made from a metal material, said inner housing assembly having a fastener striking opening formed therein and in communication with said accommodation space;
- a magazine unit mounted within said housing unit;
- a handle pivotably mounted to said housing unit;
- a striking plate mounted within said housing unit and driven with an operation of said handle for movement in an up-and-down direction from said fastener striking opening outwardly of said housing unit;
- an energy restoring member mounted within said housing unit and compressed by said handle to store a return energy;
- and
- a wire bending spring mounted within said housing unit to be biased for storing a striking energy for said striking plate in the up-and-down direction, said wire bending spring including an extending section and a backwinding section, said extending section having a first end which is engaged with said striking plate and extending along an axis to terminate at a second end, said backwinding section having a connected end portion which is connected with said second end, and extending and bending from said connected end portion toward said first end to terminate at a terminal end portion, said wire bending spring having a cross-section which defines a width perpendicular to both the axis and the up-and-down direction, and a height perpendicular to the axis and parallel to the up-and-down direction, the ratio of the height to the width ranging from 1:1 to 1:1.6.
Dependencies are inferred from the claim text.