Illumination – With implement or hand held holder therefor – Firearm
Reexamination Certificate
2003-06-02
2004-11-16
Johnson, Stephen M. (Department: 3641)
Illumination
With implement or hand held holder therefor
Firearm
C042S069010, C042S114000, C042S117000, C042S146000, C463S049000
Reexamination Certificate
active
06817728
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a trigger apparatus of a light gun.
2. Description of the Related Art
A shooting game is one of games of the Olympics, and the shooting game is classified into two kinds of games, i.e., a pistol game and a rifle game. The pistol game is on the extension of shooting training of a policeman and promotes shooting training effectively. An actual bullet is used in the game and the training. The use of the actual bullet is not desirable in the viewpoint of expense and safety, and it is desirable to use a light bullet such as a short-wavelength laser beam shot in place of the actual bullet. When the light bullet is used in place of the actual bullet, it is necessary to change the trigger apparatus of the gun.
FIG. 1
shows an example of a trigger apparatus of a conventional gun using the actual bullet. In
FIG. 1
, a barrel unit is excluded from the gun. The trigger apparatus is composed of a grip portion
101
and a trigger system fixed portion
102
. A trigger operating portion
104
is rotatably attached to a main axis
103
arranged in a bottom portion of the trigger system fixed portion
102
. The trigger operating portion
104
is composed of a trigger lever
105
rotatably coupled with the main axis
103
, and a trigger blade
106
attached to the trigger lever
105
. A trigger driven portion
107
carries out a rotating operation in conjunction with the operation of the trigger operating portion
104
. The trigger driven portion
107
is composed of a first driven lever
108
, a second driven lever
109
and a third driven lever
110
. The first driven lever
108
is formed as a unit together with the trigger lever
105
and rotates around the main axis together with the trigger lever
105
. The second driven lever
109
operates in conjunction with the first driven lever
108
but not formed as a unit with the first driven lever
108
. The third driven lever
110
operates in conjunction with the first driven lever
108
but not formed as a unit with the second driven lever
109
. The second driven lever
109
and the third driven lever
110
are rotatably supported by rotation axes different from each other. With the angular displacement in the neighborhood of the top dead point of each of the second driven lever
109
and the third driven lever
110
, the third driven lever
110
rotates by a small angle so that a hammer section
112
stopped or fixed by the third driven lever
110
is released from the stopped position and starts to move in a moment in spring power. Thus, the actual bullet is shot through the explosion of gunpowder due to impact of the hammer
112
.
FIG. 2
shows a conventional pistol-type light gun. The pistol-type light gun is composed of a grip
201
of wood, a barrel unit
202
which is attached to and supported by the grip
201
, a trigger
203
arranged in a coupling region between the grip
201
and the barrel
202
, a cocking lever
204
as a lever used to return the trigger, a front side gun sight
205
arranged in the front position of the barrel unit, and a back side gun sight
206
.
The pistol-type light gun is held by one hand of a shooter in the state that his arm extends into a target direction, the shooter sets his sight on target using cross lines of the gun sights
205
and
206
while restraining the fluctuation of his arm, and then a light bullet is shot toward the target by pulling the trigger
203
with his finger. The trigger
203
gives the reaction of a proper degree to the finger of the shooter in case of the pulling operation. When the reaction in case of the pulling operation is too weak, a relation between the trigger operation and the shooting operation of the light bullet is non-sensitive, and there is a danger that the light bullet is shot carelessly. When the reaction in case of the pulling operation is too strong, the barrel fluctuates in case of the trigger operation. As a result, the light bullet does not hit the target set using the gun sights. The actual bullet gun and the light bullet gun do not have an essential difference in the trigger operation and the reaction operation.
The reaction force corresponding to a dynamic displacement at the moment of the trigger operation acts on the finger, the arm (in case of the pistol) or the shoulder (in case of the rifle) of the shooter. The existence of such reaction becomes the cause of the necessity of the shooting training and is also the cause of the existence of the shooting game.
It is demanded to provide a special trigger apparatus for a light gun since an actual bullet is not shot from the light gun and reaction force is not present in the shooting operation of the light bullet. Also, the simplification of the trigger apparatus is demanded for the shooting game.
SUMMARY OF THE INVENTION
Therefore, an object of the present invention is to provide a trigger apparatus of a light gun in which a trigger system is like the trigger system of an actual bullet gun.
Another object of the present invention is to provide a trigger apparatus of a light gun in which a trigger system is simplified.
In an aspect of the present invention, a trigger apparatus of a light gun includes a main body, first to third rotation axes, a hammer receiving portion, and first to fourth lever portion. The first to third rotation axes are provided for the main body; a hammer receiving portion is provided in an upper portion of the main body. The first lever portion extends from the main body to the outside of the main body and a trigger operation is carried but to the first lever portion. The second lever portion is rotatably supported by the first rotation axis, and the first lever portion is fixed to the second lever portion. The second lever portion rotates in a counterclockwise direction in response to the trigger operation to the first lever portion. The third lever portion is rotatably supported by the second rotation axis and rotates in a clockwise direction in response to the rotation of the second lever portion. The fourth lever portion is rotatably supported by the third rotation axis and rotates in the counterclockwise direction in response to the rotation of the third lever portion. The first end portion of the third lever portion engages with a first end portion of the fourth lever portion before the trigger operation, and when the third lever portion is rotated in the clockwise direction, the fourth lever portion is released from the engagement and rotates in the counterclockwise direction. A middle portion of the fourth lever portion is provided as a hammer and the hammer hits the hammer receiving portion while the fourth lever portion is rotated.
Here, the trigger apparatus of the light gun may further include a first spring portion which is provided for a first end portion of the second lever portion to apply first spring force to the first end portion of the second lever portion. In this case, the trigger apparatus of the light gun may further include a first member which is provided for the main body; and a first adjusting unit which is provided for a second end portion of the second lever portion to determine an initial position of the second lever portion in relation to the first spring force. Also, the trigger apparatus of the light gun may further include a fixed member which is fixed to the main body; and a stroke adjusting portion which is provided for the second lever portion between the first rotation axis and the first spring portion to determine a stroke of the first lever portion in the trigger operation.
Also, the trigger apparatus of the light gun may further include a second spring portion which is provided for the main body to apply second spring force to the third lever portion such that the first end portion of the third lever portion engages with the first end portion of the fourth lever portion. In this case, trigger apparatus of the light gun may further include a second position adjusting portion which is provided for the main body to adjust the second spring force such that a
Johnson Stephen M.
NEC Corporation
Young & Thompson
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