JP3056607B2 - Information recording / reproducing device - Google Patents

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 / reproducing apparatus in which a card carrier can be reciprocated during a predetermined stroke while being guided by a pair of guide shafts provided in a horizontal plane. It relates to a playback device.

[0002]

2. Description of the Related Art An information recording / reproducing apparatus using an information recording medium such as an optical card reciprocates an optical card relative to an optical head and scans a data track on the card to record and reproduce information. ing.

In a conventional apparatus of this kind, a card carrier is driven by a driving means such as a linear motor for a predetermined stroke while being guided and supported by a main guide shaft and a sub guide shaft which are installed in parallel in a horizontal plane. Reciprocating linear motion at high speed. Conventionally, it has been attempted to lay the main guide shaft and the sub guide shaft in parallel with the card conveying direction by engaging each of the main guide shafts and the sub guide shafts through a bearing having a circular hole without any gap. The card carrier and the main guide shaft are engaged with each other without any gap through the main bearing of the circular hole, while the card carrier and the sub guide shaft are U-shaped In this case, the slide bearing is engaged via the auxiliary bearing. . As these main bearings and sub bearings, sliding bearings are used.

[0004]

In the above-mentioned conventional information recording / reproducing apparatus, the bearing hole of the main bearing slidingly engaged with the main guide shaft is a circular hole, so that it has sufficient durability even when used for a long period of use. However, when the U-shaped groove is open on one side, the auxiliary bearing that slides and engages with the auxiliary guide shaft is in line contact with the bearing surface of the auxiliary bearing and the auxiliary guide shaft at a predetermined position, and is worn due to sliding. However, there is a problem that the durability is poor and durability is poor. 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 that the distance between the optical head and the optical card cannot be accurately and constantly maintained. In addition, the card carrier may vibrate due to wear at a predetermined portion of the bearing surface of the sub bearing in line contact with the sub guide shaft, so that the card carrier cannot reciprocate in a stable state. There is a problem that the recording / reproduction is adversely affected.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, to prevent local wear of a portion where a sub-bearing of a card carrier comes into contact with a sub-guide shaft, to prevent vibration caused by abrasion, and to prevent card conveyance. An object of the present invention is to provide an information recording / reproducing apparatus which enables a table to reciprocate 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 fixedly holding a card on which information is recorded / reproduced is installed on a machine base at intervals. And an optical head carriage having an optical head for recording and reproducing information on and from the card is linearly reciprocated in a direction orthogonal to the transport direction of the card transport table. In the information recording / reproducing apparatus, the sub-guide shaft is disposed so as to be inclined at a predetermined minute angle in the same plane with respect to the main guide shaft, and the main bearing extends from one side of the card carrier. Are engaged with the main guide shaft through a 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 oblong bearing hole. Things.

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

[0008]

According to the present invention, the sub-guide shaft is disposed so as to be inclined at a predetermined minute angle within the same plane with respect to the main guide shaft. It is possible to prevent the contact portion from moving laterally and the bearing surface from being worn linearly.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One 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, wherein reference numeral 1 denotes a machine base, and brackets 2a, 2b, and 3a, 3b stand on four corners of the machine base 1. The main guide shaft 4 is installed horizontally between the brackets 2a and 2b. A sub-guide shaft 5 is provided horizontally between the brackets 3a and 3b. These guide shafts 4 and 5 are arranged such 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 be. Therefore, the main guide shaft 4 and the sub guide shaft 5 are not parallel, but have a relationship where their extension lines intersect. A card carrier 6 is slidably mounted on the main guide shaft 4 and the sub guide shaft 5 in a longitudinal direction. The card carrier 6 is reciprocated between a forward stop position and a backward stop position by a linear motor 7. It can move linearly (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 has an information area 9a in the center thereof for recording information, and non-information areas 9 on which information is not recorded on both outer sides of the information area 9a.
b is provided.

In the space above one end of the machine base 1, a front mask 10 is provided via a support bracket (not shown).
Is mounted. A card insertion passage 11 is formed through the inside of the front mask 10, and the card insertion passage 11 has a card entrance 12 and a card exit 13. The optical card 8 is inserted from the card entrance 12, exits from the card exit 13, and is transferred to the card carrier 6. Notch 1 in part of front mask 10
In the cutout 14, a feed roller set for holding the optical card 8, giving a feed motion to the card, and feeding the optical card 8 onto the card carrier 6 is incorporated. The 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 opposes the optical card 8. Accordingly, 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. To 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). A linear motor (not shown) makes a reciprocating linear motion in a direction perpendicular to the direction. The optical head 18 includes a laser light source 19, and the laser light source 19 irradiates a laser beam onto the optical card 7 for recording or reproducing information.

As is apparent from FIGS. 1 and 2, on one side of the card carrier 6, main bearings 21 and 22 having two circular bearing holes slidable on the main guide shaft 4 are attached.
On the other hand, on the other side of the card carrier 6, a sub bearing 23 having a single oval bearing hole slidable on the sub 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.

The main guide shaft 4 on which the main bearings 21 and 22 slide.
Are provided with two stopper bushes 24 and 25. The position where the card carrier 6 is closest to the card outlet 13 of the front mask 10 is the forward stop position. At this forward stop position, the end surface of the main bearing 21 abuts against the stopper bush 24 and stops. The position where the card carrier 6 is farthest from the card outlet 13 of the front mask 10 is the retreat stop position. In this retreat stop position, the end surface of the main bearing 22 is connected to the stopper bush 2.
5 and is stopped. In this way, the card carrier 6 reciprocates linearly between the forward stop position and the backward stop position.

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

Since the present invention is configured as described above, the bearing surface of the sub bearing 23 comes into contact with 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, the contact position of the bearing surface of the sub bearing 23 with respect to the sub guide shaft 5 is displaced in the lateral direction. The lateral length of the bearing surface of this sub bearing is at least the stroke of reciprocating the sub guide shaft 5 that guides and supports the card carrier 6 at a predetermined minute angle θ ° with respect to the main guide shaft 4. It suffices if the displacement COS (90-θ) ° can be covered.

Therefore, the bearing hole in which the bearing surface of the auxiliary bearing 4 slides with the auxiliary guide shaft 5 is not limited to an elliptical shape, but has a shape such as a U-shaped groove having the length of the contact portion displaced in the lateral direction. You may.

In the case where the bearing hole is a U-shaped groove, there is a possibility that the width on the open side gradually widens, so that an oval shape can perform a 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 inclined at a predetermined minute angle with respect to the main guide shaft. The position where the surface is in sliding contact with the guide shaft is displaced in the horizontal direction instead of in a straight line, and it is possible to prevent the bearing surface from being worn locally in a straight line, and to prevent vibration of the card carrier during reciprocating motion. A stable reciprocating motion can be given to the card carrier.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an 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 and holding device of the information recording / reproducing apparatus according to the present invention, cut along line AA in FIG.

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

FIG. 4 is a transverse cross-sectional view cut along the line DD in FIG. 3;

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

FIG. 6 is a transverse cross-sectional view cut along the line FF of FIG. 5;

[Explanation of symbols]

 Reference Signs List 4 main guide shaft 5 sub guide shaft 6 card carrier 8 optical card 21 main bearing 23 sub bearing

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-282957 (JP, A) JP-A-4-120680 (JP, A) JP-A-1-135571 (JP, U) JP-A-3-135 100966 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) G11B 19/02 521 G06K 13/07

Claims (2)

(57) [Claims] 1. A card carrier fixedly holding a card on which information is recorded / reproduced linearly reciprocates via a bearing along a main guide shaft and a sub guide shaft which are erected at intervals on the machine base. In an information recording / reproducing apparatus wherein an optical head carriage having an optical head for recording / reproducing information on / from the card is linearly reciprocated in a direction orthogonal to a transport direction of the card transport table, the sub guide shaft is a main guide. The main bearing is disposed so as to be inclined at a predetermined minute angle in the same plane with respect to the shaft, and 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, wherein 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 said bearing hole is engaged with a sub guide shaft via a U-shaped groove.