JPH06251495A - Information recording and reproducing device - Google Patents

Abstract

PURPOSE:To stably reciprocate a card transfer base by inclining a sub guide shaft with respect to a main guide shaft by a prescribed minute angle. CONSTITUTION:A position where the bearing surface of a sub bearing 23 comes in contact with the sub guide shaft 5 is displaced in a horizontal direction while a card transfer base 6 is moved between forward and backward stop positions. The contact position of the bearing surface of the bearing 23 with the shaft 5 is displaced in the horizontal direction. The length of the bearing surface of the bearing 23 in the horizontal direction is required at least to cover a displacement amount COS (90-theta) deg. between the ends of stroke of the shaft 5 guiding and supporting the base 6 and reciprocated while inclining by a prescribed minute angle theta to the main guide shaft 4. In such a manner, since the shaft 5 guiding and supporting the base 6 is inclined by the minute angle thetato the shaft 4, the position where the bearing surface of the bearing 23 comes in slid contact with the guide shaft is not on a straight line but displaced in the horizontal direction, and the fact that the bearing surface is worn linearly partially is prevented, and the vibration in the base 6 at the time of reciprocation is prevented, and thus, the base 6 is reciprocated stably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing apparatus and, more particularly, to an information recording apparatus capable of reciprocating a predetermined stroke while a card carrier is guided by a pair of guide shafts installed in a horizontal plane. Reproduction device

[0002]

2. Description of the Related Art An information recording / reproducing apparatus using an information recording medium such as an optical card performs reciprocating linear motion of an optical card with respect to an optical head and scans a data track on the card to record and reproduce information. ing.

In a conventional apparatus of this type, the card carrier is guided and supported by a main guide shaft and a sub guide shaft which are laid in parallel in a horizontal plane, and is driven by a driving means such as a linear motor during a predetermined stroke. Is performing a reciprocating linear motion at high speed. Conventionally, it has been attempted to engage the main guide shaft and the sub guide shaft with each other through a bearing having a circular hole without a gap so that the main guide shaft and the sub guide shaft are installed parallel to the card transport direction. Since it is difficult to adjust it, the card carrier and the main guide shaft engage with each other without a gap through the main bearing of the circular hole, while the card carrier and the auxiliary guide shaft have a U-shaped groove with the outside open. The sub-bearing is used to engage in a sliding contact manner. . Sliding bearings are used for both the main bearing and the sub bearing.

[0004]

In the above-mentioned conventional information recording / reproducing apparatus, since the bearing hole of the main bearing which slide-engages with the main guide shaft is a circular hole, it has sufficient durability even for long-term use. However, in the case of a U-shaped groove that is open on one side, the sub-bearing that slide-engages with the sub-guide shaft has abrasion due to sliding because the bearing surface of the sub-bearing and the sub-guide shaft make a line contact However, there was a problem that it was easy to progress and was poor in durability. Due to this abrasion, it is difficult to keep the surface level of the card carrier at the initial position, and there is a problem in that the distance between the optical head and the optical card cannot be accurately kept constant. In addition, the card carrier is not able to reciprocate in a stable state because the card carrier is vibrated due to the wear of the bearing surface of the auxiliary bearing that comes into line contact with the auxiliary guide shaft at a predetermined part. There is a problem that it adversely affects the recording and reproduction of.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the problems of the above-mentioned prior art, to prevent local abrasion of the portion where the auxiliary bearing of the card carrier is in contact with the auxiliary guide shaft, to prevent vibration caused by abrasion, and to carry the card. An object of the present invention is to provide an information recording / reproducing device capable of reciprocating the table in a stable state for a long period of time.

[0006]

In order to achieve the above object, the present invention provides a main guide shaft in which a card carrier, which holds a card on which information is recorded and reproduced, is fixedly installed on a machine stand at intervals. And linearly reciprocating along a sub guide shaft via a bearing to linearly reciprocate an optical head carriage having an optical head for recording / reproducing information on / from the card, in a direction orthogonal to the carrying direction of the card carrier. In the above information recording / reproducing apparatus, the sub guide shaft is arranged so as to be inclined at a predetermined small angle on the same plane with respect to the main guide shaft, and the main bearing extends from one side of the card carrier. Is engaged with the main guide shaft through the circular bearing hole, and the sub bearing extending from the other side of the card carrier is engaged with the sub guide shaft through the oval bearing hole. It is a thing.

Further, it is also characterized in that the sub bearing is engaged with the sub guide shaft through a U-shaped groove bearing hole which is open on one side.

[0008]

According to the present invention, since the sub guide shaft is arranged so as to be inclined with respect to the main guide shaft at a predetermined minute angle in the same plane, the bearing surface of the sub bearing which is in sliding contact with the sub guide shaft is formed. It is possible to prevent the contact portion from moving laterally and the bearing surface from being linearly worn.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an information recording / reproducing apparatus according to the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view showing an information recording / reproducing apparatus according to an embodiment of the present invention. Reference numeral 1 denotes a machine base, and brackets 2a, 2b, and 3a, 3b stand at four corners of the machine base 1. The main guide shaft 4 is horizontally installed between the brackets 2a and 2b. A sub guide shaft 5 is horizontally installed between the brackets 3a and 3b. These guide shafts 4 and 5 are arranged so that their axes are included in the same horizontal plane, and the sub guide shaft 5 is inclined at a predetermined minute angle with respect to the axis of the main guide shaft 4. It is arranged to. Therefore, the main guide shaft 4 and the sub guide shaft 5 are not parallel to each other, and their extension lines intersect each other. A card carrier 6 is mounted on the main guide shaft 4 and the auxiliary guide shaft 5 so as to be slidable in the longitudinal direction, and the card carrier 6 is reciprocated between a forward stop position and a backward stop position by a linear motor 7. It is capable of linear movement (Fig. 4). An optical card 8 as an information card is fixedly held at a predetermined position on the card carrier 6. As shown in FIG. 1, the optical card 8 is provided with an information area 9a in which information is recorded in the center thereof, and a non-information area 9 in which information is not recorded on both outer sides of the information area 9a.
b is provided.

A front mask 10 is provided in a space above one end of the machine base 1 via a support bracket (not shown).
Is mounted. A card insertion passage 11 is formed so as to penetrate through the inside of the front mask 10. The card insertion passage 11 has a card inlet 12 and a card outlet 13. The optical card 8 is inserted through the card entrance 12, exits through the card exit 13, and is delivered onto the card carrier 6. Notch 1 in part of front mask 10
4 is formed, and a feed roller set that holds the optical card 8 and applies a feeding motion to the card to feed the optical card 8 onto the card carrier 6 is incorporated in the notch 14. This feed roller set includes a pair of drive rollers 16 driven by a drive motor and a belt (not shown).
And a pinch roller 17 that sandwiches the optical card 8 so as to face it. Therefore, when the optical card 8 is inserted into the insertion passage 11 by a predetermined depth, the drive motor drives the drive roller 16 by the detection of the entrance sensor provided in the insertion opening (not shown), and the optical card 8 exits the card exit 13. And sends it toward the card carrier 6.

An optical head 18 is supported above the card carrier 6 with respect to an optical head carriage frame (not shown), and the optical head 18 is aligned with the direction of reciprocal linear movement of the card carrier 6. A linear motor (not shown) makes a reciprocating linear motion in a direction orthogonal to each other. The optical head 18 includes a laser light source 19, and the laser light source 19 irradiates the optical card 7 with laser light in order to record or reproduce information.

As is apparent from FIGS. 1 and 2, main bearings 21, 22 having two circular bearing holes slidable on the main guide shaft 4 are attached to one side of the card carrier 6.
On the other hand, on the other side of the card carrier 6, an auxiliary bearing 23 having one oval bearing hole that is slidable on the auxiliary guide shaft 5 is attached. The card carrier 6 can reciprocate along the main guide shaft 4 and the sub guide shaft 5 via the main bearings 21 and 22 and the sub bearing 23 while making sliding contact.

Main guide shaft 4 on which main bearings 21 and 22 slide
Two stopper bushes 24, 25 are provided on the upper side. The position where the card carrier 6 is closest to the card outlet 13 of the front mask 10 is the forward stop position, and at this forward stop position, the end surface of the main bearing 21 contacts the stopper bush 24 and is stopped. The position where the card carrier 6 is farthest from the card outlet 13 of the front mask 10 is the retracted stop position, and at this retracted stop position, the end surface of the main bearing 22 is the stopper bush 2.
5 is stopped and stopped. In this way, the card carrier 6 makes a reciprocating linear motion between the forward stop position and the backward stop position.

A fixed card pressing plate 26 is attached to one side of the card carrier 6 and the card carrier 6 is held.
A flexible card pressing plate 27 is attached to the opposite side of the optical card 8 so that the optical card 8 can be fixedly held by the two card pressing plates.

Since the present invention is constructed as described above, the bearing surface of the sub bearing 23 contacts the sub guide shaft 5 while the card carrier 6 moves between the forward stop position and the backward stop position. The part is displaced laterally. That is, FIGS. 3 and 4 show a state where the card carrier 6 is at the forward stop position, and FIGS. 5 and 6 show a state where the card carrier 6 is at the backward stop position. 4 and 6, it can be seen that the contact position of the bearing surface of the auxiliary bearing 23 with respect to the auxiliary guide shaft 5 is displaced laterally. The lateral length of the bearing surface of this sub-bearing is such that at least the sub-guide shaft 5 that guides and supports the card carrier 6 is reciprocated by inclining the sub-guide shaft 5 by a predetermined minute angle θ ° with respect to the main guide shaft 4. It suffices if the displacement COS (90-θ) ° between them can be covered.

Therefore, the bearing hole in which the bearing surface of the sub bearing 4 slides with the sub guide shaft 5 is not limited to the oval shape, but has a U-shaped groove or the like having the length of the contact portion which is displaced in the lateral direction. May be.

If the bearing hole is a U-shaped groove, there is a possibility that the width on the open side gradually widens. Therefore, the oval shape allows more stable reciprocating motion.

[0018]

As is apparent from the above description, according to the present invention, the auxiliary guide shaft for guiding and supporting the card carrier is tilted with respect to the main guide shaft by a predetermined small angle. It is possible to prevent the bearing surface from being locally worn in a straight line because the position where the surface slides in contact with the guide shaft is not a straight line, but it is possible to prevent vibration of the card carrier during reciprocating motion. A stable reciprocating motion can be given to the card carrier.

[Brief description of drawings]

FIG. 1 is a perspective view showing the entire information recording / reproducing apparatus according to the present invention.

FIG. 2 is a cross-sectional view showing a fixed holding state of the card fixing holding device of the information recording / reproducing apparatus according to the present invention, taken along the line AA in FIG.

FIG. 3 is a plan view when the card carrier is at the forward stop position.

FIG. 4 is a transverse cross-sectional view taken along the line D-D in FIG.

FIG. 5 is a plan view when the card carrier is at the backward stop position.

6 is a transverse cross-sectional view cut along the line FF in FIG.

[Explanation of symbols]

 4 Main guide shaft 5 Sub guide shaft 6 Card carrier 8 Optical card 21 Main bearing 23 Sub bearing

Claims (2)

[Claims] 1. A card carrier, which holds a card on which information is recorded and reproduced, is linearly reciprocated via bearings along a main guide shaft and a sub guide shaft that are installed over the machine base at intervals. In an information recording / reproducing apparatus in which an optical head carriage having an optical head for recording / reproducing information on / from the card is linearly reciprocated in a direction orthogonal to the carrying direction of the card carrier, the sub guide shaft is a main guide. Arranged to incline at a predetermined minute angle in the same plane with respect to the shaft, the main bearing extending from one side of the card carrier is engaged with the main guide shaft through a circular bearing hole, An information recording / reproducing apparatus in which a sub bearing extending from the other side of the card carrier is engaged with a sub guide shaft through an oval bearing hole. 2. The information recording / reproducing apparatus according to claim 1, wherein the bearing hole is engaged with the auxiliary guide shaft through a U-shaped groove.