PAPER PUNCH WITH ADJUSTABLE PUNCH SEATS

A paper punch includes a base and a slide board is connected to the base. Multiple punch seats are located on the slide board and above the hole of the base. Each punch seat has a control member and a connection arm connected to the slide board. The control member is pivotably connected to the connection arm. The control member has an eccentric seat and an operation board. The eccentric seat is a cam and eccentrically connected to the connection arm. A first face is defined in the eccentric seat and located in opposite to the operation board. A second face is located adjacent to the first face. When switching the first face to the second face, the punch seat is movable along the slide board so as to obtain a desired distance between the punch seats.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring toFIGS. 1 and 2, the paper punch of the present invention comprises a base10, multiple punch seats20and a press board30.

The base10has an elongate hole11defined in the front end thereof so that debris drop from the hole11, and an index area12is formed on the rear end of the base10. The base10has two support arms13extending upward from two ends thereof, and a slide board15is connected between the two support arms13. A connection box16is installed to the underside of the base10to collect the debris from the hole11. The press board30is pivotably connected to two respective top ends of the two support arms13.

The multiple punch seats20are connected to the slide board15and located corresponding to the hole11. Each punch seat20has a frame21and a punch head22which is installed to the frame21upright and able to return to its initial position by a spring. The punch head22punches holes through paper sheets. The frame21has an aperture23defined in the underside thereof and the aperture23is located corresponding to the hole11. The punch head22movably extends through the aperture23when punching holes. The top end of the punch head22extends beyond the frame21and is pressed by the press board30. The press board30pushes the punch head22downward to punch holes and the bouncing force of the punch head22pushes the press board30to its initial position when the punching action is completed.

As shown inFIGS. 2 and 3, the slide board15having a connection side17on the outside thereof. A connection arm24extends from the punch seat20and is located above the index area12. A passage241is defined through the connection arm24and an opening242is defined in the underside of the connection arm24. The slide board15is located between the hole11and the index area12, and the slide board15inserted into the opening242of each of the connection arms24as shown inFIG. 1.

A control member40is connected to the passage241of each punch seat20and has an eccentric seat42and an operation board41which has a curved board so that the user can easily touch it. The eccentric seat42is a cam and eccentrically connected to the connection arm24by a pin43as shown inFIGS. 2 and 4, so that the eccentric seat42is pivotable about the pin43. A planar first face421is defined in the eccentric seat42and located in opposite to the operation board41. A second face422is a curved face and located close to the curved portion of the pin43. The distance “a” from the pin43to the second face422is shorter than the distance “b” from the pin43to the first face421. That is to say, the distance from the pin43to the second face422is shorter than the distance from the pin43to the first face421, so that when pivoting the eccentric seat42, the first face421contacts the connection side17of the slide board15to position the punch seat20to the slide board15. On the contrary, when pivoting the eccentric seat42in opposite direction to let the second face422pivot toward the slide board15, the second face422is gradually removed from the connection side17of the slide board15so that a gap is defied between the second face422and the connection side17. The punch seat20is movable along the slide board15.

The frame21of each of the punch seats20has a hook-shaped engaging end25which is located corresponding to the hole11of the base10. The engaging end25is slidably hooked to the inside of the hole11of the base10, so that the punch seat20is securely connected to the base10and is not separated from the base10. The engaging end25and the punch seat20simultaneously slide board along the inside of the hole11of the base10, so that the punch seat20is stably operated.

When the slide board15is connected to the punch seats20, as shown inFIGS. 1,4and5, the opening22of the punch seat20engages with the slide board15, and the engaging end25is slidably hooked to the inside of the hole11of the base10, so that the underside of the frame21is matched to the surface of the base10. The engaging end25is slidably hooked to the inside of the hole11of the base10, the punch seat20is stably operated. The punch seat20and the control member40are connected to the connection arm24so that the connection arm24can be slid according to the index of the index area12until the desired punching position. The operation board41is then operated to pivot the eccentric seat42about the pin43so that the first face421is pivoted toward the slide board15and presses the connection side17, such that the punch seat20is positioned. Therefore, the punch seat20can be adjusted the distance along the slide board15without using any extra tool.

When releasing the punch seat20, as shown inFIG. 5, by pivoting the operation board41, the eccentric seat42is pivoted about the pin43and the first face421is removed from the connection side17and a gap is formed as mentioned, so that the punch seat20is freely movable along the slide board15to achieve the purpose of the position adjustment of the punch seat20.

Because the second face422of the eccentric seat42is a curved face so that when pivoting the second face422, the curved face reduces the contact area between the second face422and the connection side17, the first face421can quickly contact the connection side17of the slide board15. By the eccentric seat42, the first face421properly presses the connection side17so that the punch seat20does not shift and is operated more stably.

As shown inFIG. 6which shows another embodiment of the present invention, the pin43is located at another position of the eccentric seat42. When the eccentric seat42is operated between the positioning position and the release position for the punch seats20, the operation directions are opposite to the directions in the first embodiment. The distance “a” between the pin43and the second face422is shorter than the distance between the pin43to the first face421, the punch seat20is stably and slidably moved along the slide board15.