Information
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Patent Grant
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6264085
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Patent Number
6,264,085
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Date Filed
Monday, January 8, 200123 years ago
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Date Issued
Tuesday, July 24, 200123 years ago
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Inventors
-
Original Assignees
-
Examiners
Agents
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CPC
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US Classifications
Field of Search
US
- 227 8
- 227 120
- 227 119
- 221 227
- 221 279
- 221 238
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International Classifications
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Abstract
A safety device for a pneumatic stapler includes a safety member rotatably mounted to a barrel of the stapler by a torsion spring located between the safety member and the barrel. The safety member has a first protrusion and a second protrusion. The first protrusion is pushed by a magazine connected to the barrel and the second protrusion is located at a higher position to allow a safety plate to be moved between the two protrusions. When the magazine is removed and the second protrusion is rotated to a lower position, the safety plate is stopped by the second protrusion.
Description
FIELD OF THE INVENTION
The present invention relates to a safety device for preventing from shooting of a pneumatic stapler when the magazine is removed from the barrel.
BACKGROUND OF THE INVENTION
A conventional pneumatic stapler employs powerful pneumatic machine to eject a staple to penetrate an object. In order to ensure a safety operation when using the pneumatic stapler, a safety plate is equipped in each of the conventional pneumatic staplers so that then trigger can only be pulled when the safety plate is unlocked. However, there is a dangerous situation that the pneumatic stapler could be unintentionally triggered to hurt people, that is when the magazine is removed from the barrel of the pneumatic stapler. This happens when the staples are jammed in the barrel and the user wants to withdraw the shooting problem so that he/she removes the magazine from the barrel and checks or removes the jammed staples. During the checking or removal of the jammed staples, the trigger could be pulled unintentionally and a staple ejects out from the barrel and hurts people.
The present invention intends to provide a safety device that is rotated when the magazine is removed and stops the safety plate from moving so as to avoid the trigger from being pulled.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a safety device for a pneumatic stapler and comprising a barrel having a slot and threaded hole respectively defined therein. A safety member has a connection hole and a first protrusion and a second protrusion respectively extend from the safety member. A boss extends from a surface of the safety member and is movably retained in the slot. A torsion spring is connected between the barrel and the safety member. A bolt extends through the connection hole of the safety member and the torsion spring and is engaged with the threaded hole in the barrel. The first protrusion is pushed upward by a magazine.
The primary object of the present invention is to provide a safety device that stops the safety plate from being unlocked when the magazine is removed.
These and further objects, features and advantages of the present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, several embodiments in accordance with the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1
is an exploded view to show a safety device for a pneumatic stapler of the present invention;
FIG. 2
is a side view to show that the safety member is rotated counter clockwise by a magazine connected to a barrel of the stapler, and
FIG. 3
is a side view to show that the safety member is rotated clockwise when a magazine is removed from the barrel of the stapler.
DETAILED DESCRIPTION OF THE EMBODIMENT
Referring to
FIGS. 1 and 2
, the pneumatic stapler of the present invention comprises a barrel
20
which has a slot
23
and threaded hole
22
respectively defined therein, and a first aperture
24
is defined in the barrel
20
and located beside the threaded hole
22
. A safety member
30
is mounted to the barrel
20
and has a connection hole
33
and a second aperture
34
defined in the safety member
30
. A first protrusion
31
and a second protrusion
32
respectively extend from the safety member
30
. A boss
321
extends from a surface of the safety member
30
and is movably retained in the slot
23
in the barrel
20
.
A torsion spring
35
is connected between the barrel
20
and one end of the torsion spring
35
is engaged with the first aperture
24
in the barrel
20
and the other end of the torsion spring
35
is engaged with the second aperture
34
in the safety member
30
. A bolt
36
extends through the connection hole
33
of the safety member
30
and the torsion spring
35
and is engaged with the threaded hole
22
in the barrel
20
. A safety plate
25
is slidably mounted to the barrel
20
and an end of the safety plate
25
and a dust cover
40
is mounted to the barrel
20
and covers the safety member
30
and the safety plate
25
. As shown in
FIG. 2
, when a magazine
21
is connected to the barrel
20
, the top end of the magazine
21
pushes the first protrusion
31
upward and the safety member
30
is then rotated counter clockwise and the second protrusion
32
is rotated to a higher position. At this position, a tongue
251
of the safety
25
can be moved between the first protrusion
31
and the second protrusion
32
and the trigger can be pulled.
As shown in
FIG. 3
, when removing the magazine
21
from the barrel
20
, the safety member
30
is rotated clockwise by the torsion spring
35
and the second protrusion
32
is lowered so that the tongue
251
of the safety plate
25
is stopped by the second protrusion
32
and the trigger cannot be pulled.
By using the safety member
30
, the safety plate
25
cannot be moved to a ready-for-shoot position if the magazine
21
is removed from the barrel
20
so that when the trigger is automatically locked when the magazine
21
is removed from the barrel
20
.
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 and spirit of the present invention.
Claims
- 1. A safety device for a pneumatic stapler, comprising:a barrel having a slot and threaded hole respectively defined therein; a safety member having a connection hole, a first protrusion and a second protrusion respectively extending from said safety member, a boss extending from a surface of said safety member, and a torsion spring connected between said barrel and said safety member, said boss movably retained in said slot in said barrel, a bolt extending through said connection hole of said safety member and said torsion spring and being engaged with said threaded hole in said barrel, said first protrusion adapted to be pushed by a magazine.
- 2. The safety device as claimed in claim 1, wherein said boss extending from a surface of said second protrusion.
- 3. The safety device as claimed in claim 1 further comprising a first aperture defined in said barrel and located beside said threaded hole, a second aperture defined in said safety member, one end of said torsion spring engaged with said first aperture in said barrel and the other end of said torsion spring engaged with said second aperture in said safety member.
US Referenced Citations (6)