JPH06231292A - Card information processor - Google Patents

Abstract

PURPOSE:To prevent the destruction of information in a hybrid card magnetic recording section due to the leakage magnetic flux to be generated from a voice coil motor. CONSTITUTION:An optical head 17 is arranged between a hybrid card 1 and a voice coil motor 7. The upper part of a lens actuator 53 of the optical head 17 is coated with a lens actuator cover 536 with the magnetic shield effect. Thus, the destruction of information recorded on a magnetic recording section 3 in the hybrid card 1 can be prevented without increasing the size of the device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card information processing apparatus for recording / reproducing information on / from a card as a card-shaped recording medium.

[0002]

2. Description of the Related Art A magnetic card for magnetically processing information is generally used as a card-shaped recording medium. However, in recent years, an optical card has attracted attention as a next-generation card-shaped recording medium. Further, in order for this optical card to be widely used, expectations for a hybrid card having both an optical recording section and a magnetic recording section are increasing.

FIG. 4 shows the configuration of the optical card 101. The optical information recording section 2 of the optical card 101 is provided with a plurality of information tracks 21 in the longitudinal direction of the optical card 101, and the information tracks 21 are partitioned by a track guide 22. Further, a pit 23 as information is recorded on the information track 21.

In the optical card 101 constructed as described above, it is necessary to accurately record or reproduce the minute pits 23 having a size of about 3 μm along the information track 21. It is necessary to drive with precision. Further, in order to perform the processing at high speed, it is also necessary to increase the speed of the driving, so that a voice coil motor is used as the driving mechanism. Further, in order to accurately position the light beam emitted from the optical head on the card, the autofocus (A
F) and automatic tracking (AT) control are required, and a voice coil motor is also used for the actuator.

On the other hand, as shown in FIGS. 5 and 6, the hybrid card 1 is provided with an optical recording portion 2 on substantially the entire one surface thereof, and a magnetic recording portion parallel to the longitudinal direction on a part of the opposite surface. 3 is provided.

FIG. 7 is a plan view showing a schematic structure of a conventional optical card processing device, and FIG. 8 is a side view. 7 and 8, a lead screw 9 is rotatably provided on the base 16 at right angles to the longitudinal direction, and the lead screw 9 is rotationally driven by a pulse motor 8 attached to the base 16. An optical head 17 is screwed onto the lead screw 9 and is moved in the direction of arrow AA by the rotation of the pulse motor 8. Further, the optical head 17 is provided with an objective lens 51 that is AF-controlled by a lens actuator 53.

On the other hand, on the base 16, a pair of left and right guide shafts 11 are attached by a shaft retainer 15 in the longitudinal direction, and the card holding table 4 is guided by the guide shafts 11 via guide bearings 55. Arrow B
-It is possible to move in the B direction. Further, a voice coil motor 7 including a permanent magnet 71, a coil 72 and a yoke 73 is provided above the base 16.
The card holder 4 is moved by the voice coil motor 7 to the arrow B-
Moved in the B direction. Then, the optical card 101 placed on the card holder 4 is irradiated with the light beam emitted from the optical head 17, and the optical card 1 is driven by the voice coil motor 7.
01 is reciprocally driven in the direction of arrow BB to record / reproduce information. Further, in order to accurately position the light beam on the optical card 101, the objective lens 51 is driven in the focus direction and the track direction by a biaxial actuator 53 using a voice coil motor to perform AF and AT control.

[0008]

However, as shown in FIG.
When a hybrid card 1 having both the optical recording unit 2 and the magnetic recording unit 3 as shown in FIG. 6 is used, the distance between the voice coil motor 7 and the magnetic recording unit 3 becomes short, and the magnetic flux is recorded by the leakage flux of the voice coil motor 7. There is a problem that the data of the section 3 is destroyed. In particular, the optical recording unit 2
Is provided almost all over to increase the capacity,
Inevitably, the magnetic recording portion 3 will be provided on the back surface thereof.
Then, the distance between the magnetic recording unit 3 and the voice coil motor 7 for driving the card becomes short, and the voice coil motor 7
Information in the magnetic recording portion is destroyed by the leakage magnetic flux from the. If the distance between the voice coil motor 7 and the card 1 is increased in order to avoid this, the distance between the driving point and the center of gravity of the movable part is also increased. Therefore, when reciprocating at high speed, vibration occurs at the time of reversal and accurate recording or reproduction is performed. I can not do it.
There is also a problem that the device becomes large.

Further, even if the hybrid card 1 is not used,
When a magnetic card is accidentally inserted into the optical card information processing device, the information may be destroyed. This is very likely to happen in the current widespread use of magnetic cards.

The present invention has been made in view of such a situation, and it is possible to prevent the information in the magnetic recording portion of the card from being destroyed by the leakage magnetic flux generated from the driving member having the magnetic circuit such as the voice coil motor. It is an object to provide a card information processing device.

[0011]

A card information processing apparatus according to claim 1, wherein an optical head 17 as a head for recording / reproducing information on / from a hybrid card 1 as a card-shaped recording medium, and a hybrid card 1 are provided. And optical head 1
In a card information processing device including a voice coil motor 7 as a drive member having a magnetic circuit for relatively moving the magnetic circuit 7 and a magnetic circuit, the distance between the hybrid card 1 and the magnetic circuit is set such that the magnetic flux generated from the magnetic circuit is a hybrid. It is characterized in that the interval is set to a predetermined interval or longer so that the card 1 is hardly reached.

A card information processing apparatus according to claim 2 is
An optical head 17 is arranged between the hybrid card 1 and the voice coil motor 7.

According to another aspect of the card information processing apparatus of the present invention,
A lens actuator cover 536 as a member having a magnetic shield effect is arranged between the hybrid card 1 and the magnetic circuit.

According to another aspect of the card information processing apparatus of the present invention,
The driving member is a voice coil motor 7 having a magnetic circuit, and the voice coil motor 7 drives at least a part of the optical head 17 or the hybrid card 1.

According to another aspect of the card information processing apparatus of the present invention,
The recording medium is a card capable of optically recording information, and the head is an optical head 17 for recording and reproducing information on the card.

According to a sixth aspect of the card information processing apparatus,
The recording medium is a hybrid card 1 including an optical information recording unit 2 and a magnetic information recording unit 3, and the hybrid card 1
Optical head 17 for optically recording and reproducing information with respect to
And a magnetic head 13 for magnetically recording and reproducing information.

According to a seventh aspect of the card information processing apparatus,
The optical head 17 is composed of a movable part 5 having an objective lens 51 and a mirror 52, and a fixed part 6 having a light source 61, a collimator lens 62, a beam splitter 63 and a photodetector 65. The movable part 5 is driven to record / reproduce information on / from the hybrid card 1.

According to another aspect of the card information processing apparatus,
The voice coil motor 7 drives only the objective lens 51, and the optical head 17 performs focusing and tracking of the light beam focused on the hybrid card.

According to another aspect of the card information processing apparatus of the present invention,
At least one of the card holder 18 as a holding member for holding the hybrid card 1 and the resonator cover 536 for covering the lens actuator 53 as a driving member for driving the objective lens 51 has a magnetic shield effect. It is characterized in that it is configured with.

[0020]

In the card information processing apparatus having the above structure, since the optical head 17 is arranged between the hybrid card 1 and the voice coil motor 7, the apparatus can be operated without separating the center of gravity of the movable portion and the driving point. The hybrid card 1 and the voice coil motor 7 having the magnetic circuit can be separated from each other without increasing the size. As a result, it is possible to prevent the information recorded in the magnetic information recording unit of the hybrid card 1 from being destroyed by the leakage magnetic flux generated from the voice coil motor 7.

By configuring the lens actuator cover 536 and the card holding base 18 for covering the movable optical head 5 with a member having a magnetic shield effect, the above effect can be further ensured.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the card information processing apparatus of the present invention will be described below with reference to the drawings.

1 to 3 show the configuration of an embodiment of the present invention. In these figures, the portions corresponding to those of the conventional example shown in FIGS. 7 and 8 are designated by the same reference numerals, and the description thereof will be omitted as appropriate. 1 and 2, the voice coil motor 7 is arranged below the base 16,
The optical head 17 is arranged above the voice coil motor 7 and is composed of a movable part 5 and a fixed part 6. The movable part 5 includes a frame 54 and a lens actuator 53 provided on the frame 54,
A mirror 52 and a total of three pairs of left and right guide bearings 55 are attached to the frame 54. And frame 5
4 is supported by a pair of left and right guide shafts 11 provided horizontally on the base 16 via guide bearings 55 so as to be movable in the direction of arrow BB. An objective lens 51 is provided above the lens actuator 53 on the reflection optical axis of the mirror 52.
Other than 1 are covered with a cover 536 composed of a member having a magnetic shield effect.

The fixing portion 6 of the optical head 17 is provided on one end face of the base 16 in the longitudinal direction, and the light source 61 and the collimator lens 6 are provided on the incident optical axis of the mirror 52.
2 and the beam sprinter 63, a condenser lens 64 having an optical axis in the direction perpendicular to the incident optical axis, and a photodetector 65. Then, the light emitted from the light source 61 becomes parallel light by the collimator lens 62, passes through the beam splitter 63, is reflected by the mirror 52 in the right angle direction, and is condensed by the objective lens 51 on the hybrid card 1 described later. ing. Further, each of the above-mentioned members constituting the fixed portion 6 is housed in the frame 66.

On the upper part of the base 16, the guide shaft 1
A lead screw 9 is rotatably supported in a direction perpendicular to 1, and the lead screw 9 is rotationally driven by a pulse motor 8. In addition, a card holding table 4 for detachably holding the hybrid card 1 is provided above the optical head moving part 5 so as to be movable in the direction of arrow C-C, and a lead nut fixed to the card holding table 4 is provided. Reference numeral 10 is screwed onto the lead screw 9. Further, in the upper part of the card holding member 4, the guide bar 14 provided in parallel with the guide shaft 11
The magnetic head 13 is movably attached. Further, the card holding member 4 is provided with an opening 3 at a position facing the magnetic recording unit 3 when the hybrid card 1 is mounted.
1 is formed.

As shown in FIG. 3, the lens actuator 53 has a focusing coil 532 and a tracking coil 533 wound around it, and a movable portion 536 having the objective lens 51 provided on the upper portion thereof, and a pair penetrates the movable portion 536. And the other pair of yokes 53 arranged on both sides of the movable portion 536.
4 and a permanent magnet 531 fixed to the inner surfaces of the yokes 534 on both sides of the voice coil motor 530. The movable portion 536 is displaceably supported by four support springs 535, one end of which is fixed to the yoke 534 side.

The voice coil motor 7 has a permanent magnet 71, a coil 72, and a yoke 7 as in the conventional example shown in FIG.
It is composed of 3 etc. Reference numeral 12 shown in FIGS. 1 and 2 is a position sensor which is provided above the base 16 and detects the initial position of the optical head movable unit 5.

The operation of the apparatus according to the embodiment of the present invention described above will be briefly described. When a user inserts the hybrid card 1 having both the optical recording unit 2 and the magnetic recording unit 3 shown in FIGS. 5 and 6 from an insertion opening (not shown), the hybrid card 1 is conveyed to a card holding table 4 by a loading mechanism (not shown) and shown in the drawing. Not held by the clamp mechanism. The end of this operation is detected by an optical sensor or the like, and the movable head 5 and the card holder 4 are driven to the initial position. The movable head 5 is driven by a voice coil motor 7, and the card holder 4 is driven by a mechanism using a pulse motor 8 and a lead screw 9. The card holding table 4 is driven in the track access direction C-C and has tracking servo by the lens actuator 53. Therefore, the accuracy may be rougher than that of driving the movable head 5 for recording or reproduction. Therefore, it is not necessary to use a voice coil motor, and if it is a pulse motor, it is hermetically sealed in the case and there is almost no leakage flux, and there is no risk of destroying information in the magnetic recording unit 3.

Here, when recording or reproducing information in the magnetic recording section 3, the magnetic head 13 is guided along the magnetic recording section 3 in the BB direction by an actuator (not shown).
Drive along 4. When the information in the optical recording unit 2 is recorded or reproduced, the light source 61 is turned on and the collimator lens 62 makes parallel light, which is emitted from the fixed unit 6 and enters the movable unit 5. With the mirror 52 in the movable part 5, the card 1
Is bent in a direction perpendicular to the recording surface and is focused on the optical recording unit 2 of the card 1. The light reflected by the recording surface returns to the fixed portion 6 through the same optical path, is separated from the incident light by the beam splitter 63, is condensed by the condenser lens 64, and is collected by the photodetector 6
Guided to 5. A focus error signal and a track error signal are obtained by using this reflected light. Methods for obtaining this error signal are known, and for focusing, there are an astigmatism method using a cylindrical lens, a beam decentering method in which collimated light is decentered with respect to an objective lens, and the like. There are a push-pull method and a three-beam method in which a beam is divided into three beams using a diffraction grating, but any method can be used. Using this error signal, AF and AT control is performed by moving the objective lens 51 with the lens actuator 52, so that there is always no error.

Here, if a current is passed through the focusing coil 532 of the lens actuator 53, the focusing direction F
Then, when a current is applied to the tracking coil 533, the movable portion 5 is driven in the tracking direction T. Here, only the focus servo is applied first.

If the focus servo is turned on, then a predetermined track is accessed. The pulse motor 8 is driven by sending a movement command from the initial position to the target track to the driver of the pulse motor 8. When the driving is completed, the tracking servo is applied to drive the movable head 5 by the voice coil motor 7, and the track No. Read to know the exact position. If it is different from the target track, the objective lens 51 is moved in the track direction CC to perform a fine seek to complete the access to the target track. As is known in the art for driving the voice coil motor, when a current is passed through the coil 72, a driving force acts in the L direction due to the magnetic force of the permanent magnet 71, so that the movable portion 5 moves to the guide shaft 1.
It is driven along 1 and is driven in the M direction when a current flows in the opposite direction. Next, when recording, the movable head 5 is driven, the recording start position is detected from the preformat data, and the light source is turned on with recording power, or the recording light source is turned on to record information. In the case of reproduction, similarly, the movable head 5 is driven to drive the light source with reproduction power.
N or the light source for reproduction is turned on and the reflected light is detected by the photodetector to reproduce the information.

According to this embodiment, if the movable portion 5 of the optical head is reciprocally driven in the direction of the information track 21 of the optical recording portion 2 to record and reproduce information, the voice coil motor 7 can be moved. Since it can be arranged on the lower side of 5 (the side opposite to the card 1), the distance between the card 1 and the voice coil motor 7 is kept at the distance between the center of gravity of the movable part and the driving point, and
The device can be separated without enlarging it, so that the leakage magnetic flux of the voice coil motor 7 eliminates the possibility of destroying the information in the magnetic recording portion. Further, the lens actuator 53 also uses the voice coil motor 530 as described above, and compared with the voice coil motor 7 for driving the head described above, the weight of the movable portion is small and the magnetic force can be small, but the functional card 1 is used. Can't be separated from.
Therefore, the cover 536 of the lens actuator 53 is made of a material having a high magnetic permeability such as electromagnetic mild steel to prevent the magnetic flux from leaking to the outside of the cover 536 and prevent the information in the magnetic recording unit 3 from being destroyed. You can

As described above, the information destruction of the magnetic recording portion 3 is prevented,
The card processing device compatible with the hybrid card 1 having both the magnetic recording part 3 and the optical recording part 2 has been described. However, the same method can be applied to an optical card information processing device having no magnetic head for processing magnetic information. It is possible to prevent the magnetic information from being destroyed when the hybrid card is erroneously inserted.

Similarly to the cover 536 of the lens actuator 53, the card holder 4 can be made of a material having a magnetic shield effect to prevent the information in the magnetic recording portion from being destroyed. In this case, the card holder 4
The information of the optical recording unit 2 may be recorded or reproduced by driving the voice coil motor 7 with the voice coil motor 7.

[0035]

As described above, according to the card information processing apparatus of the present invention, it is provided between the recording medium and the drive member having the magnetic circuit for relatively moving the recording medium and the head. Since the head is arranged, the recording medium and the driving member can be separated from each other without increasing the size of the apparatus,
It is possible to prevent the information recorded in the magnetic information recording portion of the recording medium from being destroyed by the leakage magnetic flux generated from the magnetic circuit. Further, by disposing a member having a magnetic shield effect between the recording medium and the magnetic circuit, the above effect can be further ensured.

[Brief description of drawings]

FIG. 1 is a plan view showing the configuration of an embodiment of a card information processing apparatus of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a perspective view showing a configuration of the lens actuator of FIG.

FIG. 4 is an explanatory diagram showing a configuration of an example of an optical card.

FIG. 5 is an explanatory diagram showing a configuration on an optical recording unit side of an example of a hybrid card.

FIG. 6 is an explanatory diagram showing a configuration of a magnetic recording unit side of an example of a hybrid card.

FIG. 7 is a plan view showing a configuration of an example of a conventional optical card processing device.

FIG. 8 is a side view of FIG. 7.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hybrid card (card-shaped recording medium) 5 Moving part 51 Objective lens 52 Mirror 53 Lens actuator (driving member) 536 Lens actuator cover (member) 6 Fixed part 61 Light source 62 Collimator lens 63 Beam splitter 65 Photodetector 7 Voice coil motor (Drive member) 13 Magnetic head 17 Optical head 18 Card holder (holding member)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location // G06F 3/08 A 7165-5B

Claims (9)

[Claims] 1. A card information processing apparatus comprising: a head for recording / reproducing information on / from a card-shaped recording medium; and a drive member having a magnetic circuit for relatively moving the recording medium and the head, A card information processing apparatus, wherein a distance between the recording medium and the magnetic circuit is set to a predetermined distance or more so that a magnetic flux generated from the magnetic circuit hardly reaches the recording medium. 2. Between the recording medium and the drive member,
The card information processing apparatus according to claim 1, wherein the head is arranged. 3. Between the recording medium and the magnetic circuit,
The card information processing apparatus according to claim 1, wherein a member having a magnetic shield effect is arranged. 4. The driving member is a voice coil motor having the magnetic circuit, and at least a part of the head or the recording medium is driven by the voice coil motor. Card information processing device described. 5. The recording medium is an optical card capable of optically recording information, and the head is an optical head for recording and reproducing information on the optical card. The card information processing device according to any one of 1 to 4. 6. The recording medium is a card having an optical information recording section and a magnetic information recording section, and an optical head for optically recording and reproducing information on the card, and magnetically recording and reproducing information. 5. The card information processing apparatus according to claim 1, further comprising a magnetic head for performing the above. 7. The optical head comprises a movable part having an objective lens and a mirror, and a fixed part having a light source, a collimator lens, a beam splitter and a photodetector, and the movable part of the optical head by the voice coil motor. 7. The card information processing apparatus according to claim 5, wherein the card information driving apparatus drives the card to record and reproduce information on and from the recording medium. 8. The voice coil motor drives only the objective lens, and the optical head focuses and tracks a light beam focused on the recording medium. Card information processing device described. 9. A holding member that holds the recording medium and at least one of a covering member that covers the driving member that drives the objective lens are formed of a member having the magnetic shield effect. Claim 3
7. The card information processing device according to any one of 7 to 7.