JPH0221423A - Line sensor - Google Patents

Abstract

PURPOSE:To accurately perform position adjustment by constituting a device of a first system consisting of a means to release a holding and fixing means by driving a plunger electromagnetically and a second system consisting of a means to turn the first system and a head. CONSTITUTION:The device is constituted of a driving system consisting of a solenoid coil A to drive the plunger 23 connected to the holding and fixing means of a sensor head consisting of a pad 21 and a spring 22 electromagnetically, and the driving system to rotate the sensor head 7 around a rotational center 11 by a solenoid coil B to drive the plunger 25 connected to a spring 24 electromagnetically. In such a way, since a head position adjusting device performs the position adjustment of the head based on the balance of the electromagnetic force and the pressing force of the driving system, it is possible to perform an operation accurately and stabilized for a long period.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an apparatus for reading recorded data on an optical card having an optical recording section consisting of a plurality of linear data tracks parallel to each other.

<Prior Art> An optical card (C) as shown in FIG. 4 has been conventionally known as a recording medium from which data can be read out optically. This optical card (C) usually has an optical recording section (ordinarily) in which dot-shaped (or focus-shaped) digital signals are recorded in a plurality of data trunks (T) of the present invention parallel to the side edges of the card.
M). As a method of reproducing recorded data, reading a using a CCD line sensor, etc. (hereinafter referred to as line sensor)
It has been proposed to install the optical card parallel to the data track, move the optical card while maintaining the parallel state with the line sensor, and read the information on the data track one after another with the line sensor to scan the entire surface of the card.

By the way, when data is recorded on an optical card (or when the card is manufactured if it is a read-only card), data tracks are sometimes formed at an angle with respect to the direction of movement of the card.

In order to solve these problems, a device has been proposed that rotates and corrects the line sensor with respect to the data track. For example, as shown in FIG.
In order to rotate the sensor around the rotation center (11), an arm (13) is extended from the crank line sensor (7).
Form the rack 041 on 1, and attach the gear 0 to this rack 04.
5) and the gear 0ω are engaged, the gear 0e is rotated by the motor 0, the crank 021 and the arm 0■ are operated, and the line sensor is aligned with the data track.

<Problems to be Solved by the Invention> However, in the above device, the mechanical movable means has a complicated structure and causes errors due to mechanical wear and loosening due to long-term use, making the device unreadable and causing problems. This may lead to decreased reliability.

Therefore, an object of the present invention is to provide a line sensor that has a simple configuration and can perform accurate position adjustment.

<Means for Solving the Problems> The present invention provides a line sensor for reading data recorded on an optical card, which includes means for holding and fixing a line sensor head, a plunger connected to the holding and fixing means, and electromagnetically driving the plunger. a first system comprising means for releasing the holding and fixing means, and interlocking with the line sensor head;
In addition, the above problem is solved by a line sensor configured with a second system consisting of a plunger connected to an urging means and means for electromagnetically driving the plunger to rotate the line sensor head.

As described above, the line sensor head position adjustment device of the present invention adjusts the line sensor head position by balancing the electric force and biasing force of the drive system, so it can be adjusted accurately and over a long period of time. Stable operation is possible.

<Example> Hereinafter, the present invention will be described in detail based on embodiments of the drawings.

FIG. 1 is a perspective view schematically showing an example of the overall configuration of an optical card reading device according to the present invention. (1) is a l/ranking stage on which an optical card (C) as shown in Fig. 4 is placed;
) is provided on a conveyance base (3) that is slidably supported on a conveyance guide shaft (2).

This conveyance base (3) is movable in the direction of arrow Y in the figure by means of a conveyance motor (4) and a feed screw (5) interlocked with the conveyance motor (4).

FIG. 2(a) is a block diagram of the line sensor head position adjustment device according to the present invention, which includes a line sensor head holding and fixing means consisting of a band (21) and a spring (22), and a line sensor head holding and fixing means connected to this holding and fixing means. A drive system consisting of a plunger (23) and a solenoid coil (A) that electromagnetically drives the plunger (23), and a plunger (25) that is linked to the line sensor head (force) and connected to a spring (24). ) and a drive system that rotates the line sensor head (7) around the rotation center (11) by a solenoid coil (B) that electromagnetically drives the plunger (25).

In this device, an analog signal (read signal) from a line sensor head (7) of a reading part such as a guideline or a tracking line is converted into a digital signal by a drive circuit (31) to obtain the inclination of a data track. Transfer to (32). The transferred signal is used by the microcomputer (32) to detect and judge the displacement of the line sensor head (7), and sends a release signal for the line sensor head holding/fixing means to the control circuit (33). The solenoid coil (
A current flows through the pad (21) and the line sensor head (the force becomes position adjustable).The solenoid coil (B) has the line sensor head (7) (
A signal is sent from the microcomputer (32) to the D/A converter (3) to generate a voltage that moves the plunger (25) by a displacement (△X) corresponding to the spray angle (Δθ).
4) Voltage side through? ff! 1 circuit (35).

FIGS. 2(b) and 2(C) are a partially enlarged side view and a plan view showing the line sensor head (7) held and fixed, and in this case, between the Tulenold coils (^) aa' and the solenoid coil (B ) bb', no current flows, the plunger (23) is drawn by the spring (22), and the line sensor head (7) is held and fixed by the pad (21).

FIG. 2(d) is a partially enlarged side view showing the position adjustment state of the line sensor head (7), and FIG.
Similarly, f) is a plan view showing a state in which the position of the line sensor head is adjusted by rotating to the left and rotating to the right.

A voltage of 24V is applied between aa' and the plunger (
25) is drawn toward the solenoid coil, and the pad (
21) is separated from the line sensor head (7), and the line sensor head (7) becomes movable. On the other hand, the solenoid coil (B) is moved by a plunger (2
5) is applied to drive the line sensor head (
The slope of 7) is corrected.

If it is determined that there is further inclination, the correction process as described above is repeated.

A schematic diagram of the reading device is shown in FIG. The irradiation light emitted from the light [(61) irradiates the data track (T) of the optical card (C) through the half mirror (9), and
The reflected light from C) passes through the half mirror (9) and the imaging lens (
10), the light is received by a line sensor head (7), and data is output by a digital computer (8) which receives a read signal from the line sensor head (7). The line sensor head (7) has pixels arranged in a direction perpendicular to the plane of the paper, and scans the corresponding location on the optical card (C) in this direction.
C) is sent in the direction of arrow Y in the figure, thereby making it possible to scan the entire surface of the optical card (C).

According to the present invention, the structure is simplified because a solenoid coil is used for the position adjustment device of the line sensor, and the line sensor head can be easily adjusted even when the reading device is used for a long period of time. Accurate position adjustment becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a perspective view schematically showing an example of the overall configuration of an optical card reading device according to the present invention, FIG. 2(a) is a configuration diagram of a line sensor according to the present invention, and FIG. )
, (C) is a partially enlarged schematic side view and a schematic plan view of the line sensor head held and fixed, and FIG. 2(d)
is a partially enlarged side view of the line sensor head in the INFI position, and Figures 2(e) and 2(f) are also schematic plan views showing the position adjusted by turning left and right. FIG. 3 is a schematic diagram of a reading device, FIG. 4 is an external view of an optical card, and FIG. 5 is a configuration diagram of a conventional line sensor. 7...Line sensor head A...Solenoid coil 11...Rotation center B...Solenoid coil 23.25...Plunger T...Data trunk 22.24...Spring patent application Representative Kazuo Suzuki, Jintoppan Printing Co., Ltd. Figure 2 (a) Figure 2 (Mountain Figure 3 Figure 2 (e> Figure 2 (f) Figure 5

Claims (1)

[Claims] (1) In a line sensor that reads data recorded on an optical card consisting of a plurality of linear data tracks parallel to each other, a means for holding and fixing a line sensor head, a plunger connected to the holding and fixing means, and the plunger are used. a first system comprising means for electromagnetically driving to release the holding and fixing means, and interlocking with the line sensor head;
A line sensor comprising a second system comprising means for electromagnetically driving a plunger connected to an urging means to rotate the line sensor head.