Non-biasing guiding mechanism

Details Non-biasing guiding mechanism Non-biasing guiding mechanism

2003-01-22

2004-12-28

Le, Dang (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S090000, C310S0400MM

Reexamination Certificate

active

06836034

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of Invention
The present invention relates to a guiding mechanism, and more particularly, to a non-biasing guiding mechanism used in a CD-R drive to drive a data access device to move along a specific direction for accessing data on a CD.
2. Related Art
Please refer to FIG.
1
.
FIG. 1
shows a schematic view of an inner portion of an optical disk drive according to the prior art. The optical disk drive includes a carrier
1
, a data access device
2
(including an optical pickup head and objective lens), and a guiding mechanism
5
. The carrier
1
is used to support an optical disk. The data access device
2
can read and write data on the optical disk. The guiding mechanism
5
is used to guide the data access device
2
to move along a specific direction for accessing data on the optical disk.
Please refer to
FIG. 2
, FIG.
3
and
FIG. 4
, which show cross-sectional views of different types of guiding mechanisms according to the prior art. A first conventional guiding mechanism shown in
FIG. 2
includes a supportive chassis
51
, an elastic component
52
, a first positioning element
53
, a driver
54
, a second positioning element
55
, and a shaft
56
. Two ends of the supportive chassis
51
are respectively formed with openings
511
a
,
511
b
. The elastic component
52
has a hole corresponding to the opening
511
a
so that the first positioning element
53
can go through the hole of the elastic component
52
to reach the opening
511
a
and be elastically supported by the elastic component
52
.
The driver
54
, such as a rotation motor, installed on the supportive chassis
51
has a through hole
542
corresponding to the opening
511
b
. The second positioning element
55
installed opposite to the through hole
542
has a slot
551
. Therefore, one end of the shaft
56
can be fixed inside the first positioning element
53
, while the other penetrates through the opening
511
b
of the supportive chassis
51
and the through hole
542
of the driver
54
, and is fixed inside the slot
551
of the second positioning element
55
.
With the above setup, the data access device
2
is forced to move along the direction guided by the shaft
56
, accessing data on the optical disk conveyed by the carrier
1
. However, in the first guiding mechanism
5
, the driver
54
and the supportive chassis
51
as well as the driver
54
and the second positioning element
55
are fixed by welding or screws. This structure is likely to make the shaft
56
deviate from the center, causing difficulty in data reading or writing.
A second conventional guiding mechanism
5
is shown in FIG.
3
. The above-mentioned elastic component
52
is provided at the second positioning element
55
. Its function is still to put a pressure on the shaft
56
so that the shaft
56
is not able to make an axial displacement. This structure, however, is still not able to improve the deviation problem of the shaft
56
. A third conventional guiding mechanism
5
shown in
FIG. 4
also has the same problem.
In view of the foregoing, it is desirable to provide a non-biasing guiding mechanism so that the data access device of the optical disk drive can move along a specific direction for smoothly retrieving data in the optical disk supported by the carrier.
SUMMARY OF THE INVENTION
A primary objective of the invention is to provide a non-biasing guiding mechanism so that the data access device of the optical disk drive can move along a specific direction for smoothly retrieving data in the optical disk supported by the carrier.
The disclosed guiding mechanism is used to make an object move along a specific direction. The guiding mechanism mainly includes a driver, a shaft chassis, and a shaft. The driver is installed on one end of the shaft chassis and has an axis-fixing member. The axis-fixing member has ring parts on the opposite ends and a hole formed in a concentric way with the ring part in a unitized shape. The ring part is coiled by a coil and sets inside the drive, and the hole is installed outside the drive. The shaft is installed on the shaft chassis, with one end penetrating through the shaft chassis and installed at the axis-fixing member.
Consequently, the invention uses the driver to drive the shaft and the object thereon to move along the shaft direction. The axis-fixing member installed on the driver restricts the shaft from having axial displacement. Therefore, the shaft axial problems happening in the conventional technology is solved.


REFERENCES:
patent: 4703243 (1987-10-01), Ettelman et al.
patent: 4841190 (1989-06-01), Matsushita et al.
patent: 5651206 (1997-07-01), Matarazzo
patent: 5798592 (1998-08-01), Peterson
patent: 5811903 (1998-09-01), Ueno et al.
patent: 6255749 (2001-07-01), Aoshima et al.
patent: 6541886 (2003-04-01), Mayumi
patent: 63-7150 (1988-01-01), None

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