초록 ▼

An elecrically-operated tacker includes means for driving a tack which is urged toward a muzzle section by a spring, an operating means for moving the driving means back to a starting position, a switch having a push button, a trigger means having a pair of first and second depressing elements, a co

An elecrically-operated tacker includes means for driving a tack which is urged toward a muzzle section by a spring, an operating means for moving the driving means back to a starting position, a switch having a push button, a trigger means having a pair of first and second depressing elements, a control member for maintaining the first depressing element in an operative position, a safety means for normally maintaining the control member in a safety position, first and second engaging elements provided on the operating means, third, fourth and fifth engaging elements on the driving means, and a release means. Initially the driving means is located in a starting position immediately before a first extreme position. When the trigger is depressed, the push button is depressed by the first depressing element to move the driving means for a slight distance to the first extreme position so that the driving means springs to the second extreme position by the action of the spring to drive a tack. At substantially the same time that the driving means springs to the second extreme position, the first depressing element is forced out of the engagement with the push button. However, before the first depressing element is disengaged therefrom, the second depressing element is allowed to engage with the push button. When the driving means has reached the second extreme position, the second engaging element engages with the third engaging element to move the driving means to a substantially middle position and, then the first engaging element engages with the fourth engaging element to move the driving means to the starting position. At the same time that the driving means reaches the starting position, the release means disengages the second depressing element from the push button of the switch to switch the tacker off.

대표청구항 ▼

An electrically-operated tacker comprising (a) a driving means initially located in a starting position immediately before a first extreme position for driving a tack into an object to be tacked, (b) means for urging the driving means toward a second extreme position opposite to the first extreme po

An electrically-operated tacker comprising (a) a driving means initially located in a starting position immediately before a first extreme position for driving a tack into an object to be tacked, (b) means for urging the driving means toward a second extreme position opposite to the first extreme position such that the driving means can spring from the first extreme position to the second extreme position to drive the tack, (c) an operating means for moving the driving means from the second extreme position to the starting position against an action of the urging means, (d) an electric motor for operating the operating means, (e) a power source for supplying an electric current to the motor, (f) a switch for making or breaking an electrical connection between the power source and the motor, the switch having a push button, (g) a trigger means which can be directly depressed by an operator, (h) a first depressing element connected to the trigger means for depressing the push button of the switch to start the tacker when the trigger means is depressed by the operator, (i) a control member of a resilient material for maintaining the first depressing element in an operative position where the first depressing element can depress the push button, the control member being movable between a safety position where a first end of the control member is out of engagement with the first depressing element and a second, opposed end of the control member is out of a housing and an operating position where the first end of the control member is in engagement with the first depressing element and the second end of the control member is in the housing, (j) a safety means for normally maintaining the control member in the safety position where the control member does not allow the push button of the switch to be depressed if the trigger means is depressed, the first end of the control member locating the first depressing element to the operative position when the first end thereof comes into engagement with the first depressing element, (k) a first cooperative element which is moved as the operating means moves and is located to engage with the control member, at substantially the same time that the driving means springs from the first extreme position to the second extreme position, such that the first end of the control member is forced out of the engagement with the first depressing element to displace the first depressing element from the operative position to an inoperative position where the first depressing element no longer depresses the push button, (l) a second depressing element connected to the trigger means, the second depressing element coming into engagement with the push button which has already been depressed by the first depressing element, at the same time that the driving means moves away from the first extreme position, and holding the push button depressed after the first depressing element has been displaced to the inoperative position, (m) a second cooperative element which is moved as the operating means move, (n) a third cooperative element which is moved as the driving means moves and is operatively associated with the second cooperative element, the second cooperative element coming into engagement with the third cooperative element, after the driving means has reached the second extreme position, and remaining in the engagement with the third cooperative element until the driving means comes to a substantially middle position, (o) a fourth cooperative element which is moved as the driving means moves and is operatively associated with the first cooperative element, the first cooperative element coming into engagement with the fourth cooperative element, at substantially the same time that the second cooperative element disengages from the third cooperative element, and moving the fourth cooperative element to return the driving means to the starting position where the fourth cooperative element is still engaged by the first cooperative element to hold the driving means in the starting position, (p) a release means provided in conjunction with the second depressing element, and (q) a fifth cooperative element which is moved as the driving means moves and is operatively associated with the release means, the fifth cooperative element coming into engagement with the release means, at substantially the same time that the driving means reaches the starting position, to operate the release means to disengage the second depressing element from the push button, thereby switching the tacker off, and the first cooperative element moving the driving means for a slight distance to the first extreme position, when the trigger is depressed, and then disengaging from the fourth cooperative element to allow the driving means to spring to the second extreme position by the action of the urging means.