Patent Application
20220288802
The present invention relates to a hole puncher.
In many fields, such as institutions, schools and offices, there are large number of paper documents or other objects to be punched. For archiving and storing, the paper documents are punched to form holes therethrough so as to facilitate the attachment of the paper documents to loose-leaf folders and other devices.
Generally speaking, a hole puncher is used to punch through the paper documents. The punching rod is driven by pressing the lever to penetrate through the paper documents, to form the through holes. The hole puncher is simple in structure, easy to operate and effective in punching, so it is widely used. However, when punching a large number of paper documents, the punching rod penetrates the large number of paper documents and the outer peripheral surface of the punching rod contacts the inner sides of the through holes of the large number of paper documents on a large area, resulting in that the punching rod and the lever are dragged by friction and cannot return automatically. As a result, it needs to manually return the lever by pulling up after every punching, which is extremely inconvenient, and time-consuming and labor-consuming.
The present invention is, therefore, arisen to obviate or at least mitigate the above-mentioned. disadvantages.
The main object of the present invention is to provide a hole puncher which ensures the collimation and precision of movement of a punching rod so that the punching rod can retract easily and hardly be jammed within the article(s) to be punched.
To achieve the above and other objects, a hole puncher is provided, including: a frame, including a base and a guide portion, the base including at least one punching hole, the guide portion including at least one guide hole corresponding to the at least one punching hole, there being a distance between the punching hole and the guide hole; an operating lever, movably connected to the frame; at least one punching rod, driven by the operating lever, being relatively movable within the at least one guide hole and movable to come within or out from the at least one punching hole, each punching rod including a first straight section, a second straight section and a tapered section which is tapered from the first straight section toward the second straight section.
The present invention will become more Obvious from the following description when taken in connection with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment(s) in accordance with the present invention.
Please refer to
The frame 10 includes a base 11 and a guide portion 12, the base 11 includes at least one punching hole 111, the guide portion 12 includes at least one guide hole 121 corresponding to the at least one punching hole 111, and there is a distance d1 between the punching hole 111 and the guide hole 121. for receiving at least one article P to be punched (such as paper, sheet or plate member, or the like). The operating lever 20 is movably connected (pivoted, for example) to the frame 10. The at least one punching rod 30 is driven by the operating lever 20 and is relatively movable within the at least one guide hole 121 and movable to come within or out from the at least one punching hole 111. Each of the at least one punching rod 30 includes a first straight section 31, a second straight section 32 and a tapered section which is tapered from the first straight section 31 toward the second straight section 32. Preferably, the first straight section 31 has an extent d2 larger than the distance d1. Whereby, when the first straight section 31 punches and moves through the at least one article P to come into the punching hole 111, the first straight section 31 is guided by the guide hole 121 and the punching hole 111 (as shown in
Specifically, the frame 10 includes a plurality of said guide portions 12 and a plurality of said punching rods 30, and each of the plurality of said punching rods 30 further includes an expanded section 34 expanding from the tapered section 33 toward the second straight section 32, which can prevent the punching rod 30 from jamming within the at least one article P and can distribute stress on the punching rod 30 when pushing. The first straight section 31 and the second straight section 32 are cylindrical and have the same outer diametric dimension. The first straight section 31 and the second straight section 32 may be of any of other shapes. Preferably, at least one elastic member 40 is disposed between the operating lever 20 and the frame 10 so that the operating lever 20 can automatically return to its original position after operated. The tapered section 33 is movable to be located between one said punching hole 111 and one said guide hole 121 which correspond to each other. The tapered section 33 is preferably necked, in which after the at least one article P is penetrated by the first straight section 31 to form a through hole P1, the tapered section 33 is located within the through hole P which reduces friction and is advantageous for retraction of the punching rod 30 (
In this embodiment, the first straight section 31 of each said punching rod 30 includes a long blade portion 311 and a short blade portion 312 which are movable through one said punching hole 111, fir entire penetration through the at least one article P. The long blade portion 311 is closer to the punching hole 111 than the short blade portion 312, and the long blade portion 311 and the short blade portion 312 are in a high-low arrangement relative to the base 11, which effectively and labor-savingly for penetrating the at least one article P. The guide portion 12 further includes at least one pair of side walls 123, and each said side wall 123 includes a guide slot 124. The at least one punching rod 30 is slidably disposed within the guide slot 124 of the at least one pair of side walls 123 by at least one shaft 50, to stabilizes operation of each of the at least one punching rod 30. Respective bottom sides of the guide slots 124 of each pair of side walls 123 are in a high-low arrangement relative to the base 11 and have respective enlarged sections 125 of different diametric dimensions, which is compatible with various types of shafts.
Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly the invention is not to be limited except as by the appended claims.
