Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Reexamination Certificate
2000-01-27
2003-05-13
Saras, Steven (Department: 2675)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
C345S166000
Reexamination Certificate
active
06563490
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an improved third-axis input device of mouse, especially to a third-axis input device of mouse, the roller thereof is directly transmitted to generate optical signal.
BACKGROUND OF THE INVENTION
As shown in
FIGS. 1
to
3
, the conventional third-axis input device
20
of mouse
10
is arranged for providing scrolling function. The mouse
10
comprises at least a base
101
, a cover
102
, a circuit board
103
, a left button and a right button, all are well known art.
The third-axis input device
20
comprises a hollow case
1
located at a dent
104
arranged in front of the primary circuit board
103
and pivotally arranged at the base
101
of the mouse
10
. The case
1
has two pivotal plates
11
on both sides thereof and having a through hole
12
. The base
101
has poles
105
corresponding to the pivotal plates
11
, an elastic member
106
(for example, spring) on each pole
105
. The through hole
12
is hooked on top of the pole
105
and lays against the elastic member
106
.
The case
1
has two retaining grooves
13
and
14
extended on two other sides thereof and a pivot rod
15
on one side thereof corresponding to a micro-switch
107
.
A roller
2
is pivotally arranged within the hollow case
1
. A lengthwise opening
108
is provided on the cover
102
and equal distance to the left and right buttons such that an operative portion of the roller
2
exposes out of the mouse
10
from the lengthwise opening
108
.
The roller
2
has a closed lateral side and a pivot rod
21
on the lateral sides thereof and pivotally engaged with the retaining groove
13
such that the roller
2
is retained within the case
1
. The roller
2
has a plurality of positioning holes
22
on the closed lateral side. The case
1
has a positioning pole
16
corresponding to the roller
2
. The roller
2
has an opened lateral side and has an accommodating space
23
therein and containing a driving wheel
24
of a wheel set.
An optical means
3
is arranged within the accommodating space
23
and has a hollow housing
31
, which has a clamping plate
32
on the lateral side not facing the accommodating space
23
. The clamping plate
32
is engaged within the retaining groove
14
. The hollow housing
31
has a cover plate
39
on the lateral side facing the accommodating space
23
. A driven wheel
33
is provided to engage with the driving wheel
24
when the roller
2
rotates. The driven wheel
33
is embedded into the embedding groove
34
of the cover plate
39
through a link
331
, and connected to a wheel cover
35
and an encoder wheel
36
within the housing
31
. An infrared transceiver
37
is arranged at a position corresponding to the encoder wheel
36
and electrically connected to a circuit board
38
, which is electrically connected to the circuit board
103
of the mouse
10
.
When user rotates the roller
2
, the driving wheel
24
drives the driven wheel
33
and the encoder wheel
36
is rotated accordingly. The transceiver
37
sends signal to the circuit board
38
and then to the primary circuit board
103
of the mouse
10
. When user presses the roller
2
, the pivot rod
15
is pressed to touch the micro switch
107
and activate the third axis input function. The case
1
lays against the pole
105
hooked by the elastic member
106
, which generates a rebound force for the roller
2
and buffer the pressing force of the roller
2
. When the roller
2
is not rotated, the positioning pole
16
is located within the positioning holes
22
such that the roller
2
is retained.
However, the above mentioned mouse has complicated structure and the encoder wheels of the driving wheel and the driven wheel have transmission rate error and manufacture error such that, the transmission is indirect. Therefore, the sensing time has error, the signal transmission has error and the error rate in actual use is high. Moreover, the driven wheel is locked within an embedding groove on the cover by a link rod, the alignment thereof is difficult. The assembling of such mouse is hard to automatic.
It is an object of the invention to provide an improved third-axis input device of mouse, wherein the a ring formed on the roller is modified to provide directly an encoder wheel, thus saving manufacture cost and assembling time.
It is another object of the invention to provide an improved third-axis input device of mouse, wherein the encoder wheel is directly driven with optical means, therefore, the operation is more precise and the operation time is reduced.
To achieve above objects, the present invention provides an improved third-axis input device of mouse, which comprises a hollow roller stage mounted on the base of mouse and a hollow roller pivotally arranged on the roller stage. The roller exposes out of the cover of the mouse. The roller has a closed lateral surface and an opened lateral surface to define an accommodation space therein. A ring is formed on an inner side of the closed lateral surface and extending within the accommodation space. The ring has a plurality of equal-separation tooth-shape strips on surface thereof for functioning as an encoder wheel. The encoder wheel is mounted with respect to an optical means having a case, a circuit board connected to the primary circuit board of the mouse, and an infrared transceiver.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing, in which:
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Hsieh Cheng-Liang
Lu Shu Feng
Wang Ching-Shun
Jorgensen Leland R.
Saras Steven
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