Patent Application
20120085215
1. Field of the Invention
The invention generally relates to a paper holes punching machine. More particularly, the invention relates to a multiple holes punching machine in which the holes-punching unit may be fitted to the main body more easily and more securely and in which the borderline distance may be adjusted easily.
2. Description of the Prior Art
With regard to the types of holes punching machines, there are two holes punching machine (which may be operated manually) and multiple holes punching machine.
Because multiple holes punching machine needs more power in its operation and is structurally more complex, it is larger. The purchase of two or more of such machines with different holes punching capacity would cost more money and take up more space.
Therefore, the multiple holes punching machine may have the design that the holes-punching unit is detachable from the main body. A manual stick is provided on either side of the main body so that, as the holes-punching unit needs to be replaced, another holes-punching unit may be fitted to the main body easily and accurately through the engagement between the two manual sticks and the slot provided on either side of the holes-punching unit. Accurate alignment of the engagement is difficult to achieve. In addition, because there is no design to assure the tight connection between the holes-punching unit and the main body, the punching action would make the engagement out of alignment and thus would worsen the precision of holes punching.
To adjust the borderline distance, a borderline distance adjusting stick is usually provided in the holes-punching unit. However, in order to adjust the borderline distance, a user has to open up the holes-punching unit or detach the holes-punching unit from the main body. Therefore, the adjustment of borderline distance is unnecessarily more difficult and more time-consuming.
An object of the present invention is to provide a multiple holes punching machine in which the holes-punching unit may be fitted to the main body more easily and more securely.
Another object of the present invention is to provide a multiple holes punching machine in which the borderline distance may be adjusted easily.
To reach these objects, the multiple holes punching machine of the present invention is disclosed. The multiple holes punching machine of the present invention comprises a main body and a holes-punching unit. The main body may be placed on top of a flat surface stably and can generate power. The holes-punching unit is detachably fitted to the main body and can use the power generated by the main body to carry out the holes-punching operation of paper. The main body comprises a first side board and a second side board. A positioning slot is provided on the inner side of the first side board and at least a sloped surface is formed in the positioning slot. A manual stick is pivotally connected to the second side board and may be rotated. An engagement portion is provided on the stick. The holes-punching unit comprises a first side board, a second side board, a border adjusting assembly and a plurality of holes-punching members. A male positioning portion is provided on one end of the first side board and a sloped surface and an arc-shaped surface are provided on the male positioning portion. A protruding surface is formed on the arc-shaped surface. Therefore, as the holes-punching unit is fitted to the main body, accurate positioning may be achieved by the sloped surface of the male positioning portion and the sloped surface of the positioning slot and secured attachment may be accomplished by the engagement portion of the stick and the protruding surface.
The holes-punching unit of the present invention comprises a first side board, a second side board, a plurality of holes-punching members and a borderline distance adjusting assembly. Pluralities of elongated slots are provided on the inner surface of the first side board and are equally spaced and are slant. A plurality of borderline distance adjusting hole sets are also provided on the inner surface of the first side board and the hole sets and the elongated slots are arranged in an alternating manner. Each hole set has equal or more than two adjusting holes and the hole sets are slant and equally spaced. The second side board is connected with the first side board and a space is formed between the second side board and the first side board. Pluralities of holes-punching members are disposed on the second side board and would move into the space when an external force exerts on the holes-punching members. The borderline distance adjusting assembly has a sliding stick, which is disposed in the space. A plurality of sliding pieces and a plurality of positioning balls are provided on the sliding stick. The sliding stick is positioned by the engagement between the sliding pieces and the elongated slots and the engagement between the positioning balls and the adjusting holes.
The drawings disclose an illustrative embodiment of the present invention which serves to exemplify the various advantages and objects hereof, and are as follows:
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The second side board 22 is connected with the first side board 21 and a space is formed between the former and the latter to hold the holes-punching members 24 so that the holes-punching members 24 may carry out the holes-punching operation in the space.
A sliding stick 231 is provided on the borderline distance adjusting assembly 23. A plurality of sliding pieces 232 are provided on the sliding stick 231 and each of the sliding pieces 232 corresponds to one of the elongated slots 215. A plurality of positioning balls 233 are also provided on the sliding stick 231 and each of positioning balls 233 corresponds to one of the hole sets. Each of the positioning balls 233 is pushed inwards if an external force exerts on it and stays outwards if there is no external force exerting on it. The sliding stick 231 is disposed in the space formed between the second side board 22 and the first side board 21 and is positioned by the engagement between the sliding pieces 232 and the elongated slots 215 and the engagement between the positioning balls 233 and the adjusting holes 216.
We will elaborate on how the multiple holes punching machine 100 is assembled and used in the following.
In assembly, first, fit the hole-punching unit 20 to the main body 10 by engaging the male positioning portion 211 with the positioning slot 111 (as shown in
To adjust the borderline distance, move the sliding stick 231 of the hole-punching unit 20 along the elongated slots 215 so that the positioning balls 233 may move to a different level in the holes 216. In this manner, borderline distance may be adjusted easily and swiftly.
From the above, we can see that the multiple holes punching machine of the present invention meets the relevant patent requirements. It is hoped that the patent application will be approved.
Many changes and modifications in the above described embodiment of the invention can, of course, be carried out without departing from the scope thereof. Accordingly, to promote the progress in science and the useful arts, the invention is disclosed and is intended to be limited only by the scope of the appended claims.
