Patent Application
20060086589
1. Field of the Invention
The present invention relates to a stapler, and more particularly to a device which is capable of adjusting the storage space of a magazine automatically, so that the magazine can be used to hold different sized staples.
2. Description of the Prior Arts
Since a conventional magazine only can hold single-sized staples, a stapler has to use different magazines when different sized staples need be used during construction. It is not only inconvenient but also uneconomical for the worker to take several different magazines with him during construction. Thereby, how to produce a device which can enable a magazine to hold different sized staples is one of the most critical problems that the producers need to solve, and also this is the motivation of the present invention.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages of the conventional magazine for a stapler.
The primary objective of the present invention is to provide a device capable of automatically adjusting storage space of a magazine, wherein a Π-shaped adjusting plate is disposed in the magazine and provided with an abutting side in response to the push member assembly. When the push member assembly is pulled downward to load the staples, the adjusting plate will be moved backward by the guiding bolt to push against the elastic member, so that the storage space of the magazine is changed automatically. Thus, the magazine can be used to hold different sized staples. Furthermore, when the staples are positioned by the push member assembly, the abutting side of the adjusting plate will be pushed by the elastic members to push tightly against the staples.
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 embodiments in accordance with the present invention.
Referring to
The magazine 10 includes an upper plate 11, a housing 12 and a lower fastener 13. On the housing 12 and adjacent to the upper plate 11 and the lower fastener 13 are provided two pairs of upper and lower lateral holes 14, in each pair of which is inserted a limiting bolt 141 screwed with a nut 142. Between the upper and the lower lateral holes 14 is formed a vertical elongated hole 15, on two opposite internal sidewalls of the housing 12 are provided a plurality of tracks 121, and on another internal sidewall of the housing 12 are formed a plurality of positioning holes 122.
The push member assembly 20 is slideably disposed in the tracks 121 of the magazine 10 and is able to move up and down therein. The lower fastener 13 serves to fix the push member assembly 20. A push block 21 and two restoring springs 211 are disposed in the push member assembly 20, and a guide plate 22 is fixed at the front end of the push member assembly 20 by a screw 221. The guide plate 22 is formed with a pair of through holes 222 through which a guiding bolt 23 is inserted, so as to confine the guide plate 22 in the vertical elongated holes 15 of the magazine 10 by using a screw nut 231.
The Π-shaped adjusting plate 30 is confined between the inner wall of the magazine 10 and the push member assembly 20, at the upper and the lower ends of the Π-shaped adjusting plate 30 are formed through holes 31 for insertion of the limiting bolt 141, so that the Π-shaped adjusting plate 30 is limited by the limiting bolt 141 and is allowed to move laterally only. At both opposite sides of the Π-shaped adjusting plate 30 is vertically provided a slot 32 in which is formed a receiving hole 321 in response to the guide plate 22 and the guiding bolt 23, the width of the slot 32 is equal to that of the lateral holes 14. The receiving hole 321 and the slot 32 are connected by a bevel surface 322, the guiding bolt 23 at the front end of the push member assembly 20 is inserted in the slot 32, and the Π-shaped adjusting plate 30 is provided an abutting side 33 in response to the push member assembly 20.
The elastic members 40 is fixed at the positioning holes 122 on the housing 12 of the magazine 10 by a bolt 41 and a screw nut 411 in such a manner that the elastic members 40 is biased between the Π-shaped adjusting plate 30 and the housing 12.
Referring further to
On the other hand, when pulling the push member assembly 20 downward to load the staples 50, the guiding bolt 23 at the front end of the push member assembly 20 will slide downward synchronously. Meanwhile, during the movement of the guiding bolt 23 from the receiving hole 321 to the slot 32 via the bevel surface 322, the abutting surface 33 of the Π-shaped adjusting plate 30 will be moved backward by the guiding bolt 23. The limiting bolt 141 in the lateral holes 14 keeps the vertical position of the Π-shaped adjusting plate 30 relative to the housing 12 unchanged, so that the Π-shaped adjusting plate 30 will move backward to compress the elastic member 40 when the push member assembly 20 is being pulled downward, and the abutting side 33 of the Π-shaped adjusting plate 30 also moves backward to change the storage space of the housing 12. Through this way, the magazine 10 can be used to hold different sized staples 50 automatically.
While we have shown and described various embodiments in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
