Curved surface signal pick-up device

Details Curved surface signal pick-up device Curved surface signal pick-up device

1998-12-22

2001-09-11

Horabik, Michael (Department: 2735)

Coded data generation or conversion

Bodily actuated code generator

With rotary dial

C341S020000, C324S207250, C324S207230, C345S163000, C200S186000, C200S292000

Reexamination Certificate

active

06288653

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a curved surface signal pick-up device, wherein the graphic brushes are made from dividing a single located element, and the common portion and transferring portions are installed on the same radius, therefore, the rotation of a small angle can be detected, and thus the resolution is increase,
2. Description of the Prior Art
In the prior art single grid device, which is generally used in a mechanic mouse, as shown in
FIG. 4
, includes a conducted rotary disk, and a grid ring
71
is installed on the surface of the rotary disk, an insulating portion formed on the middle of the grid ring
711
. The grid ring
71
is installed with a transferring portion
712
surrounding the axial center of the rotary disk and having a strip, and further installed three graphite brushes
81
,
82
and
83
. One ends of the three graphite brushes
81
,
82
and
83
are connected with one circuit board
84
. Another ends thereof are contacted with the transferring portion
712
and the insulating portion
711
. Therefore, as the rotary disk is rotated, the graphite brushes
81
,
82
and
83
will output different voltages according to the locations of the transferring portions
712
. Namely, signals of
0
and
1
are outputted for transferring to the central processing unit of a computer.
However, in the conventional single grid encoder, the transferring portion
712
and insulating portion
711
are installed in different radii. Therefore, when a slight rotation is occurred, the graphite brushes
81
,
82
and
83
have different moving distances so that the voltage variations are effected. Therefore, the resolution can not be improved. Moreover, since the lengths and positions of the graphite brushes are different, thus the fabrication process is complicated and the cost is increased.
SUMMARY OF THE INVENTION
Accordingly, the object of the present invention is to provide a novel curved surface signal pick-up device, wherein the graphite brushes are made from dividing a single located element. The common portion and transferring portions are installed on the same radius, the rotation of a small angle can be detected, and thus the resolution is increase.
Accordingly, a curved surface signal pick-up device comprises a rotary disk and graphite brushes. The rotary disk has grid ring on the side thereof. The grid ring have a common portion and transferring portions spaced with equal or unequal distances, each of the transferring portions are arranged alternatively so that the common portion and transferring portions on the rotary disk are arranged on the same radius. Graphite brushes made by dividing an identical located element, one end of the graphite brushes are connected on a circuit board for transferring the receiving different signals, while another end of the graphite brushes are contacted with the common portion and the transferring portions of the grid ring. While the rotary disk rotates, the graphite brushes will output signals of different voltages according to the variations of the alternative transferring portions on the two sides thereof. Since the common portion and the transferring portions are installed on the same radius, even if a slight variation of angle is occurred, the present invention can detect this variation, therefore, the resolution is improved. Besides, the graphite brushes are made by dividing a single located element. Accordingly, the difficulty in fabrication is reduced and the yield is increased.
The present invention will be better understood and its numerous objects and advantages will become apparent to those skilled in the art by referencing to the following drawings in which:


REFERENCES:
patent: 4037116 (1977-07-01), Hodama
patent: 4145585 (1979-03-01), Iwasaki
patent: 4318095 (1982-03-01), Fukuoka
patent: 4443670 (1984-04-01), Nakamura
patent: 4578547 (1986-03-01), Gunther et al.
patent: 4591674 (1986-05-01), Rose
patent: 4914437 (1990-04-01), Kilbrick
patent: 5418341 (1995-05-01), Sato
patent: 5450075 (1995-09-01), Waddington
patent: 6140916 (2000-10-01), Stollsteimer

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