Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Reexamination Certificate
2001-08-27
2003-09-23
Hjerpe, Richard (Department: 2674)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
C074S4710XY, C273S14800B, C463S038000
Reexamination Certificate
active
06624806
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention is related to an improvement in the structure of a joystick and in particular to one which can control the direction control unit and acceleration control unit synchronously.
2. Description of the Prior Art
The conventional joystick is a computing lever controlling a cursor, i.e. a hand-held control stick that allows a player to control the movements of a cursor on a computer screen or a symbol in a video game. The conventional joysticks
100
(see
FIGS. 5
,
6
and
7
) generally include a base
300
, a handle
200
mounted on the base
300
and a plurality of function keys
400
arranged on the base
300
. However, such joysticks suffer from the following drawback:
1. As shown in
FIG. 6
, the direction control unit is arranged within the handle and controlled by rotating the handle clockwise or counterclockwise. Nevertheless, as the handle
200
is also used for controlling the vector variation in X-axis and Y-axis and is controlled by the wrist, the handle
200
will often be operated in mistake. Furthermore, the handle is not ergonomically designed and will often cause injury to the user.
2. As shown in
FIGS. 5 and 7
, the direction control unit is either arranged on the handle or the base. Nonetheless, it is necessary for a user to use his left or right hand finger to control the direction control unit so that when the user controls the direction control unit, he will be very difficult to control other function keys.
3. In addition, the direction control unit and the acceleration control unit of the conventional joysticks are separately arranged in different positions thereby making it almost impossible to control the two units synchronously and also increasing the manufacturing cost.
Therefore, it is an object of the present invention to provide an improved joystick which can obviate and mitigate the above-mentioned drawbacks.
SUMMARY OF THE INVENTION
This invention is related to an improvement in the structure of a joystick.
It is the primary object of the present invention to provide an improved joystick which can be used for controlling the direction control unit and acceleration control unit synchronously.
It is another object of the present invention to provide an improved joystick which can be conveniently operated by one hand.
It is a further object of the present invention to provide an improved joystick which is compact in size and low in cost.
According to a preferred embodiment of the present invention, a joystick structure includes an ergonomic handle, a base on which is mounted the handle, and a mini joystick fitted in a cavity of the handle and including a button and a direction control unit, the direction control unit being provided with a control rod which is movable in two perpendicular directions, the control rod being able to return to an original position thereof when released for controlling direction, the control rod being able to stop at any position for controlling acceleration.
The foregoing object and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.
Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.
REFERENCES:
patent: 5749577 (1998-05-01), Couch et al.
patent: 5786807 (1998-07-01), Couch et al.
patent: 5805141 (1998-09-01), Hsu
patent: 6068554 (2000-05-01), Tyler
patent: 6429849 (2002-08-01), An et al.
Hjerpe Richard
Lei Leong C.
Nguyen Francis
Weistech Technology Co., Ltd.
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