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US 4,724,992 AGranted
Electric tacker
AssigneeOlympic Co., Ltd.
InventorToshitaka Ohmori
Life of this patent
Estimating the term…
Abstract
The present invention relates to an improvement in an electric tacker covered by a motor battery operated for hammering inverted U-shape needles, T-shape tacks or nails or inverted L-shape staples, and more specifically to an improvement in a continous hammering preventive mechanism for needles tacks, nails or staples, including a staple idle hammering mechanism and a mechanism for displaying the remaining quantity of staples.
Claims4
An electric tacker comprising:
- a housing for encasing needles, said housing having a bottom and a magazine mounted on said bottom wherein said housing contains:
- (a) a percussion hammer having a hammer head for impacting said needles,
- (b) a spring for urging said hammer in an impacting direction against the needles,
- (c) a driving member for moving said percussion hammer in an urging direction of the spring actuated by rotation of a motor,
- (d) a retainer mechanism for engaging with and retaining said percussion hammer moved towards a biasing direction of said spring under an action of said driving member at a predetermined position of the top dead center of the driving member, and
- (e) a switch operating mechanism for actuating said retainer mechanism in cooperation with a turning-on or turning-off the switch, said retainer mechanism comprising:
- (i) a switch plate for reciprocally moving a switch push-button simultaneously with a switch fitting with respect to an engaging recess of a hammer cam of said percussion hammer,
- (ii) a connector plate cooperatively driving said switch plate, and
- (iii) a connector for cooperatively connecting said switch with said connector plate, wherein a pin fixed to an operation lever of said switching operating mechanism abuts against and engages with a front surface of an engaging part of said connector plate, and wherein a slider is positioned above said magazine and at a rear part of said hammer head, said slider being attached to said housing in such a way as to permit said slider to reciprocally move forward and backward, and wherein a needle catch element is fixed to a lower side of said slider in such a way to permit said needle catch element to move upwardly and downwardly simultaneously as said slider is biased by said springs towards a rear part of said hammer head.
6 more elements
Dependencies are inferred from the claim text.