JPS62205565A - Information recording and reproducing device - Google Patents

Abstract

PURPOSE:To make a recording medium hardly susceptible to injuries even after long-term use by using a material having prescribed hardness to form a recording medium feed mechanism part in contact with the recording medium. CONSTITUTION:The recording medium 1 such as magnetic card is moved by the contact of driving rollers 40 and press rollers 41 of the feed mechanism with the recording medium 1, by which the recording and reproduction by the medium 1 via a head are executed. The rollers 40, 41 which contact the medium 1 are formed of the prescribed material and the hardness thereof is made >=1,000 Vickers hardness. The rollers 40, 41 and the medium 1 are made hardly susceptible to the injuries even after long-term use. The recording and reproduction stable for a long period of time are thus executed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an apparatus for recording information on a recording medium and/or reproducing information recorded on the recording medium. In particular, a card-like machine records and/or reproduces information by moving a sheet-like recording medium and a head section for processing information on the medium relative to each other. The present invention relates to an information recording/reproducing device with an improved transmission mechanism.

Such an information recording/reproducing device is suitably used as an optical information recording/reproducing device or a magnetic information recording/reproducing device.

[Background of the invention]

Conventionally, various types of recording media such as card-shaped, disc-shaped, tape-shaped, etc. have been known as recording media used to record information using a light beam and to reproduce the recorded information using a light beam. It is being Among them, optical information recording media formed in the form of cards (hereinafter referred to as "optical cards")
) is expected to be popular as a recording medium that is easy to manufacture, portable, and easily accessible.

In an optical card, the information tracks are formed in a rectangular shape, and a large number of such information tracks are arranged in parallel in a predetermined area of the optical surface of the card. Therefore, in an information recording/reproducing apparatus using an optical card as a recording medium, a light beam spot is continuously moved relative to the information track on the surface of the optical card, and at this time information is recorded or reproduced. After moving a predetermined distance, the light beam spot is moved a predetermined distance on the surface of the optical card in a direction transverse to the direction of the information track, so that no information is recorded or reproduced at this time; Continuous relative movement is again performed in the direction of the information track, at which time information is recorded or reproduced, and in the same manner, relative movement in the direction of the information track and relative movement in the direction across the direction are performed. are alternately repeated as desired.

FIG. 8(4) is a perspective view showing the configuration of a card feeding mechanism in an information recording and reproducing apparatus using an optical card as an information recording medium, and FIG. 8(B) is a schematic cross-section taken from the direction of arrow A. FIG. 8(C) is a schematic cross-sectional view of the card insertion portion.

The optical card 1 has a recording area 2 in which information is recorded as a bit string, and this bit string is referred to as an information track 3 here. Information is reproduced by scanning the information track 3. Recording/reproduction of information is performed using a light beam 34 from the optical head 4, as will be described later.

The optical card 1 is held between driving rollers 51L, 5b, 5c and pressing rollers 6'+6br6c and reciprocates in the direction of arrow B. Below, for the sake of simplicity,
The set of the driving roller 5a and the pressing roller 6a is called a pair of rollers a, and similarly, the set of rollers 5b and 6b and the set of rollers 5c and 6c are respectively called a pair of rollers b1 and a pair of rollers C.
shall be.

The pressing rollers 6as6b+6c are rotatably installed on the connecting plate 7, and both ends of the connecting plate 7 are connected to the frame 9 via springs 8a and 8bi as biasing means. As a result, the pressure roller 5a.

6b and 6c are energized and each has one vomiting roller 5a*5b
.

Press 5c.

The rotating shafts of the drive rollers 5 a y 5 b + 5 c rotatably pass through the frame 9, and pulleys 10 a r 10 b + 10 a are fixed to each rotating shaft. The rotation of the motor 11 is carried out by the pulleys 1o& through the motor gully 12 and timing belts 13a, 13b, 13c.

10b and 10e, respectively, and drive roller 5a.

Rotate 5b and 5c fully.

Also, the reciprocating movement 1IiI is held between the pair of rollers a, b, and c.
J's: The optical card 1 is pressed on the non-pinched side by the leaf spring 14, and the sandwiched side is pressed against the frame 9. Therefore, the optical card 1 is given driving force by the rotation of the pair of rollers a, b, and c, and is guided by the frame 9 to perform reciprocating motion.

As shown in FIG. 8(B), the optical head 4 moves in the direction of the arrow to the point where it is held between the pair of rollers b of the optical card 1 (at 2), and directs the light beam 34 onto the recording area 2. To irradiate and reciprocate the optical card 1, it is sufficient to reverse the motor 11, but in order to determine the timing of the reverse rotation, position stations 15 and 16 are provided at both ends of the movement range of the optical sensor 1. Further, a detection sensor 18 is provided near the card insertion slot 17 in order to detect that the optical card 1 is inserted from the card insertion slot 17.

In addition, as shown in FIG. 8(C), the card insertion slot 17
The gap t1 and the thickness t2 of the optical card 1 have a relationship of t2<tt, so that a card with a thickness exceeding a predetermined thickness is not inserted.

FIG. 9 is a block diagram of the information recording/reproducing device 4. As shown in FIG.

In the figure, the optical head 4 is composed of a radar 19, a collimator lens 20, a beam sinter 21, an objective lens 22, and an optical sensor 23. The output of the optical sensor 23 is sent to a preamplifier 24, and the output of the preamplifier 24 is used to perform autofocusing (hereinafter referred to as "AF") and autotracking (hereinafter referred to as "AT") to an AF summer circuit 25 and AF. Length-? This is done by circuit 26.

That is, the objective lens 22 is
is driven in the direction of arrow C to focus the light beam 34, and the AT
The objective lens 22 is minutely driven in the direction of the arrow by the susceptor circuit 26 to cause the light beam to follow the information track 3.

The output of the Gurian f24 is demodulated by the decoder 27 and outputted to the outside via the interface 29 based on the command from the control section 28.

When recording information, the information is modulated by the encoder 30 and the laser driver 31 is operated.
By outputting the full output of the high Al2 optical beam modulated from , a dot row is formed in the recording area 2 of optical power -Pl. The optical head 4 itself is driven by a stepping motor 32 in the direction of the arrow. Further, the operation of the motor 11 for reciprocating the optical card 1 is controlled by a motor surf circuit 33 based on the outputs of the position sensors 15 and 16 and the detection unit 18.

In optical information recording and reproduction as described above, the diameter of the light beam spot can be set to about a few micrometers, so if the positional relationship between the optical path 4 and the information track of the optical card 1 is set accurately, extremely high density can be achieved. can be recorded and played back. For such high-density recording and reproduction, the AF control and A
T control is performed.

Furthermore, in optical information recording and reproduction, high-speed recording and reproduction is performed to fully take advantage of the above-mentioned high density.

For high-speed recording and reproduction, it is necessary to drive the feed mechanism at high speed. In order to stably and efficiently perform high-speed recording and reproducing, the optical head corresponding portion of the optical card must be moved in a direction perpendicular to the surface of the optical card and in a direction perpendicular to the direction of movement in the westward direction of the optical card. It is desirable that the runout is small and that the change in the inclination of the optical card surface is also small.

For this reason, the optical card feeding mechanism is provided with a guide means for feeding the optical card while maintaining it in a predetermined posture. For example, in the devices shown in FIGS. 2g8 and 9, the frame 9 and the leaf spring 14 are used as a guide for positioning the optical card 1f in the D direction.
A pair of rollers alblC are used as guides for vertically positioning the optical card 1 and keeping it horizontal. Then, as described above, the optical cart 01 slides into contact with the frame 9 and the leaf spring 14, and the pair of rollers a.

It rolls into contact with b+c. Many types of id means are conceivable in addition to those used in the devices shown in FIGS. 8 and 9 above.

Generally, optical cards are made of glass materials such as polycarbonate, vinyl chloride resin, acrylic resin, etc. However, if the high-speed operation as described above is carried out for a full length of time, The contact area of the optical card becomes rough due to friction, which increases the frictional resistance, causes uneven movement speed of the optical card, and even makes the optical card more likely to be scratched.As a result, the feeding mechanism becomes inoperable. A problem arises in that it becomes unstable and it becomes impossible to perform good information recording and reproduction.

[Purpose of the invention]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an information recording/reproducing apparatus having a recording medium feed mechanism that does not become unstable even if the apparatus contacts the recording medium repeatedly for a long period of time.

[Summary of the invention]

According to the present invention, in order to achieve the above-mentioned object, an information recording and reproducing apparatus that records and/or reproduces information by moving a 117-information recording medium relative to a recording and/or reproducing head is provided. Provided is an information recording and reproducing device characterized in that at least a portion of a recording medium feeding mechanism that contacts the medium during movement for information recording and reproduction is made of a material having a Vickers hardness of 1000 or more. .

〔Example〕

Hereinafter, all specific embodiments of the present invention will be explained with reference to all the drawings.

FIG. 1 (N is a schematic perspective view showing a recording medium feeding mechanism of an optical information recording/reproducing device which is a first embodiment of the device of the present invention, and FIG. 1(B) is a schematic perspective view of the recording medium feeding mechanism from the direction of arrow A. This is a cross-sectional view. In this embodiment, an optical card is used as the recording medium, and the system of the entire apparatus FI control system and the feeding mechanism is the same as that in the apparatus shown in FIG. It is similar to

In FIG. 1, the same members as in FIGS. 8 and 9 are given the same reference numerals.

In this embodiment, a lining 9& made of α-ht2o and a sintered body is attached to nine band-shaped portions of the frame 9 along the direction of arrow B that the optical card 1 comes into contact with. A lining 14 made of α-Red 203 sintered body is also applied to the band-shaped portion along the direction of arrow B that the card 1 comes into contact with.
is attached.

These linings 9as14a are fixed to the frame 9 and the leaf spring 14, respectively, with an adhesive. Also,
The contact surfaces of the second innings 9a and 14a with the optical card 1 are mirror polished and smooth.

Furthermore, in this embodiment, a pair of rollers a (not shown) consisting of a set of a three-moving roller 5a and a pressing roller 6IL, a pair of rollers b consisting of a set of a driving roller 5b and a pressing roller 6b, and A pair of rollers C (not shown) consisting of a driving roller 5c and a pressing roller 6C are both made of α-AI-203 Bfa aggregate. The contact surfaces of these pairs of rollers with the optical cart 9 are also polished.
It is smooth.

The above α-A2203 sintered body has a Vickers hardness of 1000~
About 2300 can be easily obtained.

According to this embodiment, even if the optical card 1 is moved back and forth at high speed and used repeatedly for a long time, the contact surface of the feeding mechanism with the optical card 1 will not become rough, and therefore the frictional resistance will increase. There is no possibility of the optical card being scratched, uneven feeding speed, or scratching the optical card.

In addition, since the contact surface with the optical card 1 is mirror-finished, there is less frictional resistance with the optical card 1, and especially with the lining part that makes sliding contact, this reduces the output of the drive motor. It becomes possible to downsize and reduce costs, and consumes less power. Furthermore, with this configuration, the control to keep the moving speed of the optical card 1 constant is facilitated, and the stability of the operation is increased. movement speed approx. 5
00! II+/, ++・C, the distance of about Loom is about 1
The movement of the feed mechanism remains even and stable even after 0 million reciprocations.

FIG. 2 is a schematic perspective view showing a gravel transport mechanism of a second embodiment of the apparatus of the present invention, and shows the same parts as FIG. 1(A).

This embodiment differs from the first embodiment only in that a recess is formed in the upper edge of the leaf spring 14 along the direction of arrow B, and a lining 14a is attached to the recess. Therefore,
According to this embodiment, when the optical card 1 moves back and forth in the direction of arrow B, the recessed lining 14a suppresses movement in the direction of arrow E, so that the distance from the optical head can always be kept constant.

3 and 4 are schematic perspective views showing the recording medium feeding mechanism of the third and fourth embodiments of the apparatus of the present invention, and FIG.
This shows the same part as A).

These actual cases differ from the first embodiment only in the shape of the lining IIL attached to the leaf spring 14. That is,
A concave portion is formed in the core lining 141L along the direction of arrow B. Therefore, similarly to the second embodiment, the optical card 1 moves in the direction of arrow E when reciprocating in the direction of arrow B.
Corrosion is suppressed.

FIG. 5(A) is a schematic plan view showing a recording medium transport mechanism of a fifth embodiment of the apparatus of the present invention, and FIG. 5(A) is a view taken from the direction of the arrow.

This embodiment differs from the second embodiment only in that the movement of the optical card 1 is driven by a drive row 240 that is dynamically rotated in the direction of arrow E. The drive rollers 40 have a constricted shape at the center as shown in the figure, and are rotated synchronously in the same direction by a drive means (not shown). The roller 40 is also made of α-kt203 sintered body. The optical card 1 is connected to the constriction of the roller 40 and the leaf spring 14.
It is held between the four parts of the lining 14a and reciprocates in the direction of arrow B. 3 movements, and at this time movement in the direction of arrow E is suppressed.

FIG. 6(4) shows a record 41I of the sixth embodiment of the device of the present invention.
! : Schematic plan view showing the body feeding mechanism, Fig. 6(B)
is a view taken from the direction of the arrow.

This example is 1. The only difference from the fifth embodiment is that the optical card 1 is pressed toward the drive roller 40 by the roller 41. That is, the suppression roller 41 is supported rotatably around the direction of arrow E and is urged toward the drive roller 40 side. The pressing roller 41 is also made of α-At203 sintered body.

70 is a view of the same portion as FIG. 6(B) above, showing the recording medium feeding mechanism of the seventh embodiment of the apparatus of the present invention.

This embodiment differs from the sixth embodiment only in the shapes of the constrictions of the driving roller 40 and the pressing roller 41.

In the above embodiments, α-At203 is used as the material having a Vickers hardness of 1000 or more, but other ceramics such as SIC and 5i3N4 can also be used in the present invention.

Further, in the above embodiments, the lining is bonded with an adhesive, but the lining may be formed and applied by other methods such as a thermal spraying method, a baking method, a vapor phase method, and a coating method.

In the above embodiments, a material with a Vickers hardness of 1000 or more is used for the portion of the feeding mechanism that comes into contact with the optical card, but a certain degree of effectiveness can also be achieved by using this material for at least a portion of the feed mechanism. I can do it. In that case, it is preferable to use the above-mentioned material for the parts that make full contact because the frictional force is relatively large.

The present invention can be applied not only to an apparatus that reciprocates the f-1ff body, but also to an apparatus J2K that feeds a recording medium in one direction and immediately discharges it to the side opposite to the insertion side after recording and reproduction.

Furthermore, although an optical card is used as the recording medium in the above embodiments, the present invention is also applicable to recording media based on other recording/reproducing methods, such as magneto-optical recording/reproducing methods or magnetic recording/reproducing methods. The same can be applied to the case where it is used.

〔Effect of the invention〕

According to the device of the present invention as described above, the recording medium feeding mechanism is less susceptible to wear and tear due to contact with the medium, and at the same time, the recording medium is less susceptible to wear and tear due to the feeding mechanism, and thus high-speed recording and playback can be extended. There is very little deterioration in the accuracy of recording and reproduction even after a certain period of time, and stable recording and reproduction can be continued.

[Brief explanation of drawings]

FIG. 1 (4) is a perspective view of the feeding mechanism of the device of the present invention,
) in Fig. 1 is the person's view from the arrow. FIGS. 2, 3, and 4 are perspective views of the feeding mechanism of the apparatus of the present invention. FIGS. 5(A) and 6(b) are plan views of the feeding mechanism of the apparatus of the present invention, and FIGS. 5(6) and 6(B) are A-arrow views thereof, respectively. FIG. 7 is an explanatory diagram of the feeding mechanism of the apparatus of the present invention. FIG. 8(C)) is a perspective view showing the purchase of the feed mechanism of the optical information recording/reproducing device, FIG. 8(B) is a view from the person's arrow, and FIG. 8(C'') is It is a sectional view of the card insertion part. Fig. 9 is a block diagram of the optical information recording and reproducing device. 1... Optical card, 4... Optical head, 5a to 5c, 4
0... Drive roller, 6a to 6c, 41... Press roller, 7... Connection plate, 9... Frame, 9a, 14a
... Lining, 11... Motor, 14... Leaf spring, 19... Fig. 6 (A) 1B A Fig. 6 (8) Fig. 7

Claims (3)

[Claims] (1) In an information recording and reproducing device that records and/or reproduces information by moving an information recording medium relative to a recording and/or reproducing head, the information recording medium is 1. An information recording/reproducing device, wherein at least a portion of a portion that contacts a medium is made of a material having a Vickers hardness of 1000 or more. (2) The information recording/reproducing device according to claim 1, wherein at least a part of the portion of the feeding mechanism that comes into sliding or rolling contact with the information recording medium is made of a material having a Vickers hardness of 1000 or more. (3) The information recording/reproducing device according to claim 1, wherein the contact surface with the recording medium is made of a material having a Vickers hardness of 1000 or more and is mirror-polished.