JPS63214967A - Optical card recording/playback device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a recording and reproducing apparatus using a card-shaped recording medium used in various computer systems.

Conventional technology Figure 2 shows a conventional example. The card 1 used here is a plastic substrate with a thin layer of silver particles dispersed in an organic substance attached to it, and is irradiated with laser light. This thin layer is melted and detected as a signal based on the difference in reflectance with the surrounding area. Then, the card 1 is fixed on the carriage 3 and rotated by the rubber belt 9fDO motor 8 fixed to the carriage 3 by the welded part 11 and the rotary pulley 10. It moves back and forth in the direction of the arrow in FIG. Therefore, by moving the card 1 relative to the fixed optical system 2, information is recorded or reproduced in a straight line. This straight line is called a track. Then, the optical system 2t is moved in a direction perpendicular to the direction of movement of the card 1, and recording or reproduction is performed on the next track.

Traditionally, many recording and reproducing devices rotate disc-shaped media to record and reproduce information on the circumference, but for rectangular media such as cards, it is better to record and reproduce information in a straight line on the card surface. This device is characterized by a high rate of recording area, but on the other hand, it has various mechanical problems because the card 1 is reciprocated in a straight line.

These issues include stability of movement speed, response to rising acceleration in reciprocating motion, and response to inertial force, etc.
Particularly in response to miniaturization of the device, the card 1 must be moved relative to the optical system 2 from one end of the recording track to the other, which is a difficult problem.

Problems to be Solved by the Invention In the conventional example, the relative speed of the card 1 to the optical system 2 during recording and reproduction is L2Bm/s, and the acceleration at the rise and fall to this speed becomes very large. Therefore, the card 1 is moved without moving the optical system 2, which is relatively heavy. Therefore, as described above, the device needs to be large enough to accommodate the movement width of the card 1, which is a major bottleneck in miniaturizing the device. The present invention provides a response to this miniaturization.

Means for Solving the Problems In order to solve the above problems, the card and the optical system are moved in opposite directions on the same straight line.

Function: As described above, the present invention moves both the card and the optical system in opposite directions, thereby making it possible to reduce the size of the device by the amount that the optical system has moved, compared to the conventional example.

EXAMPLE An example of the present invention will be described below with reference to FIG. The card 1, carriage 3, slide rod 6.7, and roller 4.6 are the same as those in the conventional example, but the belt 9 hung on the DC motor 8 and rotating pulley 10 is welded to the carriage 3 and the optical system 2. It is attached at section 11.16.

Further, since the optical system 2 is provided with rollers 12, 13. Slide rod 14
It is possible to move linearly by 15 degrees. Therefore, by rotating the DC motor 8't, the card 1
and optical system 2 move in opposite directions on a straight line at the same speed, and the movement width is approximately % compared to when only card 1 moves.
become. Therefore, the device was able to reduce the amount of movement of the card 1 by 1% in the direction of movement of the card 1 compared to the conventional example.

If only the optical system 2 is moved, the movement width will be approximately A compared to the case where only the card 1 is moved, but in this case, the rise and rise times are the ninth to obtain the same relative speed as the conventional example, that is, the transfer rate. The acceleration of the lower arm is large, causing damage to the optical system 2 and deterioration of its function due to the load caused by inertial force. However, in this embodiment, in order to obtain the above-mentioned relative speed, the speed of the optical system 2 only needs to be the same as this relative speed, and therefore the acceleration can also be reduced and the current optical system 2 can withstand it sufficiently.

In the above embodiment, the above-mentioned relative speed is obtained with a single DC motor 8, but when a higher transfer rate, that is, relative speed is required, the motor for moving the card 1 and the movement of the optical system are used. This can be easily achieved by using a motor with one movement per motor alone, reducing the inertial load caused by high acceleration when each movement system independently achieves the same relative speed. , to realize a highly reliable recording and reproducing device. Furthermore, by moving the optical system and the card in the opposite direction, the unidirectional inertial force of the entire device can be alleviated by a single movement, and the load on the device fixed object can be reduced or completely eliminated.

Effects of the Invention As described above, the present invention can easily achieve miniaturization of the device by moving the optical system and the card in opposite directions on the same straight line, reducing the load on the optical system and preventing damage. Alternatively, a high relative speed, that is, a transfer rate, can be achieved without causing a decline in functionality.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the main parts of an optical card recording/reproducing apparatus showing an embodiment of the present invention, and FIG. 2 is a schematic diagram of the main parts of a conventional optical card recording/reproducing apparatus. 1...Card, 2...Optical system, 3...
...Carriage, 8...DG momo--, 9
······belt.

Claims (1)

[Claims] An optical card recording and reproducing device configured to move an optical system and a card in opposite directions on the same straight line, and to record signals in a straight line on the card surface or to read signals recorded in a straight line on the card surface. .