JPH11283303A - Information recording/reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realizes thinning by reducing the thickness of a placing base. SOLUTION: An arm part 40 projected to a side surface is supported slidably in the Y direction to a support member 33 on the port side of the optical card C of the placing base 31. The support member 33 is constituted so that two sheets of slender planar members 41, 42 slightly longer than the maximum moving amount of the placing base 31 for the Y direction are combined, and the arm part 40 of the placing base 31 is held in a guide path 46 formed by the planar members 41, 42 from the top and bottom to be made movable in the Y direction. Further, a guide shaft 49 fixed to a device substrate 48 is supported to the other side of the placing base 31 movably in the Y direction through a slide bearing 50, and the placing base 31 is connected to a belt 52 on a connection part 51 to be driven by a drive means 34 consisting of a pulley 53, a gear 54 and a motor 55. In such a manner, by constituting the support member 33 supporting the placing base 31 in front of the placing base 31, and confronting the drive means 34 in the rear, the size of the thickness direction is suppressed, and a device height is reduced, and the thinning is realized.

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 for recording information on a recording medium or reproducing information from the recording medium.

[0002]

2. Description of the Related Art Conventionally, there are a magnetic system and an optical system in an information recording / reproducing apparatus. In recent years, an optical system for recording / reproducing information using a light beam has attracted attention. Examples of such an apparatus include a CD, a laser disk for rotating a disk-shaped recording medium, an optical card for reciprocating a card-shaped recording medium, and an apparatus using an optical tape. These devices can be used properly depending on the purpose, but devices using an optical card have attracted particular attention because of their excellent storability and portability.

Tracks are formed at intervals of several μm on an optical card, and information is recorded / reproduced by irradiating a spot light of several μm between the tracks. The optical head and the mounting table are orthogonal to each other. 2. Description of the Related Art There is known an apparatus that drives in a direction in which a light beam from an optical pickup of an optical head follows a track of an optical card on a mounting table in parallel.

Recently, optical heads have been reduced in size and weight with the progress of optical pickups. The optical head 1 reciprocates linearly along the information track T as shown in FIG. A method of moving in the transverse direction is generally adopted. In this apparatus, the mounting table 2 performs a seek operation for moving the optical card C in the Y direction so that the position of the optical head 1 coincides with a target track T for recording / reproducing, or a position for inserting / ejecting the optical card C. It mainly moves to a predetermined position. On the other hand, the optical head 1 records and reproduces information by irradiating the optical card C with a light beam while linearly reciprocating in the X direction by a driving source such as a voice coil motor (not shown).

FIG. 6 is a perspective view of a conventional information recording / reproducing apparatus.
7 is a side view in the optical card insertion direction, and FIG. 8 is a sectional view in a direction perpendicular to the insertion direction. The optical head 1 is disposed above the mounting table 2 on which the optical card C is mounted, and is capable of moving linearly in the X direction along the moving axis 3.

In an optical recording / reproducing system, the mounting table 2
Are positioned so that the track T of the optical card C is parallel to the movement axis 3 of the optical head 1, and the optical card C
Is held in a plane. That is, the mounting table 2
A reference surface 2a is formed on one side in the longitudinal direction of the optical card C so as to be exactly parallel to the moving axis 3, and a long side C1 of the optical card C is formed on the other side. A setting leaf spring 4 for biasing the spring 2a is attached. A reference surface 2 with which the short side C2 of the optical card C contacts the short side of the mounting table 2 opposite to the insertion slot of the optical card C.
b is provided in a direction perpendicular to the reference plane 2a.

[0007] Holding plates 5 and 6 for holding the surface of the long side C1 of the optical card C in a plane are screwed to the left and right sides of the mounting table 2 in the longitudinal direction. A protruding portion 2c is formed at the back of the mounting table 2, and the gap δ between the mounting table 2 and the holding plates 5, 6 is set to be slightly larger than the thickness t of the optical card C. I have. A pressing member 7 having a curved surface shape in the insertion direction is disposed on the rear side of four places at the central part in the longitudinal direction of the optical card C and the end on the insertion opening side of the optical card C so that the optical card C can be easily inserted. Have been. The pressing members 7 are connected to each other by two leaf springs 8 in the short side direction, and the leaf springs 8 are fixed to the mounting table 2 by screws 9 at the center.

In the support system, the mounting table 2 is supported by guide shafts 10a and 10b fixed in parallel via a bearing 11 so as to be movable in the Y direction. That is, two bearings 11 arranged on the driving point side in the moving direction and separated from each other.
On the other hand, one guide shaft 10a is fitted with little play, and the other guide shaft 10b is sandwiched and supported from above and below by sliding members 12 and 13 having good sliding characteristics. The guide shaft 10b is disposed between the pressing members 7 so as not to interfere with the card holding mechanism. One sliding member 12 is fixed, while the other sliding member 13 has a shape having a constricted portion 13a. The guide shaft 10b has elasticity in the vertical direction and is held between the two sliding members 12 and 13 so that there is no play. Further, the guide shafts 10a and 10b have a diameter having a desired rigidity so as not to be affected by vibration when the mounting table 2 moves.

The mounting table 2 is connected to a steel belt 15 wound around a pulley 14 without bending due to the tension of a leaf spring 16. The pulley 14 is connected to a servomotor 17 and 2 is driven in the Y direction. A light-shielding plate 18 is fixed to the back side of the mounting table 2, and the light-shielding plate 18 shields an optical detector 19 to detect the position of the mounting table 2.

When the optical card C is inserted into the mounting table 2, one side C 1 of the optical card C in the longitudinal direction abuts on the reference surface 2 a of the mounting table 2, and the long side C 1 facing the optical card C is a leaf spring 7. And is pushed in by a transport means (not shown),
The short side C2 of the leading end of the optical card C comes into contact with the reference surface 2b and is set on the mounting table 2. At this time, the optical card C is inserted into the gap δ between the protruding portion 2c and the holding plates 5 and 6 at the front end, and the holding plates 5 and 6 are pressed by the four pressing members 7 at the rear end and the center of the optical card C. It is urged to the side and held flat.

When the optical card C seeks to the target track T or when the optical card C is inserted or ejected, the mounting table 2 moves to a predetermined position which is positioned by the light shielding plate 18 and the optical detector 19. Then, the laser light from the optical head 1 is irradiated on the recording medium surface of the optical card C to perform recording and reproduction.

In the optical recording / reproducing system, if the moving axis 3 of the optical head 1 and the track T of the optical card C are largely displaced from parallel, the laser beam cannot follow the track T and the optical card C becomes large. If it is warped, the reflection angle of the laser light on the recording medium surface changes and the optical axis of the laser light shifts, making it impossible to perform accurate recording and reproduction. For this purpose, the track T of the mounting table 2 is positioned parallel to the movement axis 3 of the optical head 1 so as to hold the optical card C in a plane.

It is important that the focus of the laser beam does not significantly deviate from the recording medium surface of the optical card C during the seek operation of the mounting table 2. Normally, the laser beam is subjected to auto-focus control so as to focus on the recording medium surface of the optical card C. However, when the mounting table 2 largely shakes or vibrates up and down due to acceleration or deceleration of the movement, The control is lost, and a process of performing the control again is required, which degrades the recording / reproducing performance. For this reason, the mounting table 2 is configured to take a stable posture in the vertical direction, and by gripping the guide shafts 10a and 10b with a desired urging force, an automatic vibration such as vertical vibration during the movement of the mounting table 2 is achieved. Factors that disturb the focus control are suppressed to achieve stable performance.

[0014]

However, in an apparatus in which the supporting system is arranged below the mounting table 2 as in the above-described conventional example, the height of the supporting system and the thickness of the mounting table 2 are required, and the dimension in the thickness direction is required. And the mounting table 2 is made thinner,
It is difficult to reduce the size of the device. For this purpose, the mounting table 2
It is conceivable that the support system is formed on the side of the optical card C to reduce the thickness. However, in order to secure the insertion path of the optical card C, it is not possible with the structure of the conventional support system.

An object of the present invention is to solve the above-mentioned problems,
It is an object of the present invention to provide an information recording / reproducing apparatus in which the thickness of a mounting table is suppressed to be small and the thickness is reduced.

[0016]

To achieve the above object, an information recording / reproducing apparatus according to the present invention comprises: a mounting table for holding a card-shaped information recording medium; An information recording / reproducing apparatus having a driving means for linearly moving in an orthogonal direction and a supporting means for supporting the mounting table, wherein the supporting means has a guide shaft fixed to the device base and a bearing provided on the mounting table. It is characterized by comprising a first support portion, and a second support portion including an arm protruding laterally from the mounting table and a guide groove provided on a device base that slides the arm. .

Further, an information recording / reproducing apparatus according to the present invention comprises:
An information recording / reproducing apparatus having a mounting table for holding a card-shaped information recording medium, driving means for linearly moving the mounting table in a direction perpendicular to the optical head, and support means for supporting the mounting table. The support means includes a first support portion having a guide shaft fixed to the apparatus base and a bearing provided on the mounting table, and a second support portion provided separately from the first support portion. A connecting portion between the driving means and the mounting table is provided at a position facing the second support portion with the first support portion interposed therebetween, and the connection is performed using a rotational moment generated around the guide shaft as an acting force. Or the second support portion.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. FIG. 1 is a perspective view of the first embodiment, and FIG. 2 is a cross-sectional view of a mounting table. As in the conventional example, an optical head 30 and a mounting table 31 for mounting an optical card C are arranged vertically. The optical head 30 can be moved linearly in the X direction along the moving axis 32. In the supporting means of the present embodiment, a support member 33 for supporting the mounting table 31 is disposed in front of the mounting table 31 on the insertion side of the optical card C.
A driving unit 34 for driving the mounting table 31 is disposed behind the unit 1.

The mounting table 31 has a reference surface 31a on one side in the longitudinal direction where the long side C1 of the optical card C abuts, and the optical card C on the other side on the reference surface 31a. A leaf spring 35 for urging is fixed. Also, a reference surface 31b that abuts the short side C2 of the optical card C is provided on a side of the mounting table 31 in the short direction opposite to the insertion opening of the optical card C.
Is provided.

On the left and right sides of the mounting table 31 in the longitudinal direction,
Holding plates 36 and 37 for holding the surface of the long side C1 of the optical card C in a plane are screwed, and a protruding portion 31c is formed on the back side of the mounting table 31. A pressing member 38 having a curved surface with respect to the insertion port is disposed on the back side of four places at the center in the longitudinal direction of the mounting table 31 and the end on the insertion port side, and the pressing member 38 has a short side. The two leaf springs 39 are connected in the direction by a leaf spring 39, and the leaf spring 39 is fixed to the mounting table 31 by a screw at the center.

At the insertion slot side of the optical card C of the mounting table 31,
A protruding arm 40 is attached to the side, and the arm 4
The upper and lower surfaces of 0 have a curved surface shape in the Y direction. The arm portion 40 is supported by a support member 33 so as to be slidable in the Y direction. The support member 33 is formed of two elongated plate members 41 slightly longer than the maximum movement amount of the mounting table 31 in the Y direction. ,
42 are combined. The upper part in the longitudinal direction of the upper plate member 41 is an inclined surface so that the optical card C can be easily inserted, and the protrusions 43 are formed at both ends in the longitudinal direction. Further, the lower plate member 42 is formed with a long and narrow protrusion 44 in the longitudinal direction that has a substantially circular cross section in the short direction, and both ends of the protrusion 44 and the protrusion 43 are connected at a shaft 45, and the upper plate member 41 is rotatable about a shaft 45 with respect to the lower plate member 42.

The arm portion 40 of the mounting table 31 is sandwiched from above and below in a guide path 46 formed between the upper plate member 41 and the lower plate member 42, and the upper plate member 41 and the lower plate member 42 have both ends. The upper plate member 41 is connected to the arm 4 by a compression coil spring 46.
It is urged so as to pinch 0. Also, the lower plate member 4
2 has a thickness 1 / a in a hole 48a provided in the device base 48.
About two embedded and fixed.

The mounting table 31 is connected to a guide shaft 49 fixed to an apparatus base 48 via a sliding bearing 50 in Y direction.
It is movably supported in the direction. Unlike the conventional example, the driving means 34 of the mounting table 31 is disposed not on the lower side of the mounting table 31 but on the rear side to reduce the size of the apparatus in the thickness direction. A connecting portion 51 is attached to the mounting table 31, and is connected to a belt 52 via the connecting portion 51. The belt 52 is connected to a motor 55 via a pulley 53 and a gear 54. A driving means 34 for driving in the Y direction is formed. Further, a light-shielding plate 56 is attached to the mounting table 31, and a positioning detection system for the mounting table 31 is configured together with the optical detector 57 arranged on the device base 48.

With the above structure, when the optical card C is inserted from the opening 48b provided on the side of the apparatus, the upper plate member 41 serves as a guide by a transport system (not shown) so as to guide the upper surface 4b.
It is pushed into the mounting table 31 while sliding on 1a. Further, the long side C1 of the optical card C is biased by the urging member 35 on the mounting table 31 so that the information track T of the optical card C is parallel to the moving axis 32 of the optical head 30 as in the conventional example. The holding plate 3 is pressed against the reference surface 31a.
6 and the pressing member 38 to be held in a planar manner. The optical card C moves on the mounting table 31, and the short side C2 at the tip of the optical card C contacts the reference surface 31b and is set on the mounting table 31.

When the optical card C is mounted on the mounting table 31,
The mounting table 31 is driven in the Y direction along the guide shaft 49 by the driving of the motor 55 via the gear 54, the pulley 53, and the belt 52, and moves to a target track. Then, the optical head 30 moves above the track T, the laser beam emitted from the optical head 30 is focused on the card recording surface, and the recording / reproducing operation is performed. When the optical card C is ejected after the seek operation to the target track T or the completion of the recording / reproducing process, the optical detector 5
7 is shielded from light, and the mounting table 31 moves to the positioned position. During this movement, the mounting table 31 can maintain a stable posture because the arm 40 is sandwiched vertically.

As described above, a support member 33 for supporting the mounting table 31 is provided in front of the mounting table 31 as supporting means.
By arranging the driving means 34 on the rear side, the height H2 of the conventional apparatus shown in FIG. 8 is smaller than that of the conventional apparatus shown in FIG. 2, and the mounting table 31 can be made thinner. it can.

In a drive system using the belt 52 and the pulley 53, an urging mechanism such as an idler pulley for applying tension to the belt 52 is usually used. In this embodiment, as shown in FIG. A moment M1 is generated by a force P1 acting on the arm portion 40, and an acting force R1 is exerted on the connecting portion 51 with the belt 52, and tension can be applied to the belt 52 by the acting force R1. The urging mechanism described above is not required, and the size of the apparatus can be reduced.

FIG. 3 is a perspective view of the second embodiment, and FIG. 4 is a sectional view of the mounting table. The same reference numerals in FIGS. 1 and 2 denote the same members. The configuration of the mounting table 31 is the same as that of the first embodiment.
And drive means 61 are arranged. The mounting table 31 holding the optical card C is provided via a slide bearing 50 disposed on the rear side of the mounting table 31 so as to suppress the dimension in the thickness direction with respect to the guide shaft 49 fixed to the device base 48. , Y direction.

On the other hand, on the front side of the mounting table 31, an arm 40 is provided.
The upper and lower surfaces of the arm portion 40 are Y
It has a curved surface with respect to the direction. A support member 60 composed of a U-shaped member 62 is fixed to the device base 48, and a guide path 63 extending in the Y direction is formed in the support member 60. The guide path 63 is provided on the mounting table 3 in the Y direction.
The arm portion 40 is inserted into the guide path 63. Taxiway 63
Is formed to be slightly larger than the thickness of the arm portion 40, and supports the arm portion 40 so as to be slidable in the Y direction. The upper surface 62a of the U-shaped member 62 is formed slightly below the card insertion path, and also serves as a guide when the optical card C is inserted. The mounting table 31 is provided on the guide shaft 49 side of the mounting table 31 on the opposite side of the support member 60.
Screw 6 for moving the head to the target track
4, a driving means 61 including a lead pin 65, gears 66 to 68, and a motor 69 is provided.

When the optical card C is inserted through the opening 48b on the side of the apparatus, it is fed into the apparatus by a transport system (not shown), and is pushed into the mounting table 31 while sliding on the upper surface 62a of the U-shaped member 62 and is loaded. You. When the optical card C is mounted on the mounting table 31, the motor 69 is driven to drive the gears 66 to
68, the lead screw 64 rotates, and the lead pin 65 is pressed against the lead screw 64, and
1 moves to a target position detected by the light shielding plate 56 and the optical detector 57. While the optical head 30 moves along the track T of the optical card C, the laser light emitted from the optical head 30 is focused on the recording surface of the card, and the recording / reproducing operation is performed.

At this time, as shown in FIG. 4, the mounting table 31 has a rotational moment M2 around the guide shaft 49.
Is generated, the arm portion 40 is pressed against the lower surface 62a of the groove portion by the acting force R2 balanced with the moment M2. Thus, when the mounting table 31 moves, the acting force R
2 and the lower surface 6 of the arm 40 and the groove 63
3a slides, so that the mounting table 31 can always maintain a stable posture. Further, the upper surface 63b of the groove 63
Acts as a stopper when a large force such as an impact during transportation acts.

As described above, the support means for holding the mounting table 31 by the apparatus base 48 without using the guide shaft 10 b as in the conventional example is provided in front of the mounting table 31, and by the urging force of the lead pin 65. By applying a rotational moment about the guide shaft 49, the support member 6
By setting the acting force R2 to zero, the mounting table 31 can be maintained in a stable posture.

Since the guide shaft 49 and members for supporting the guide shaft 49 are not required below the mounting table 31, the thickness is reduced and the height H1 of the conventional example shown in FIG. As shown in the figure, it can be configured to be thin up to a small height H3, and a further simple structure can be realized. Although the lead pin 65 is used in this embodiment, the same configuration can be made by using a leaf spring.

[0034]

As described above, the information recording / reproducing apparatus according to the present invention has a first structure having a guide shaft and a bearing.
The support means for the mounting table, which is composed of the support section of the above and the second support section including the protruding arm and the guide groove, is provided on the side of the mounting table, so that the insertion path of the card-shaped information recording medium is secured. However, it is possible to reduce the thickness of the mounting table in the thickness direction, thereby achieving a reduction in thickness.

Further, the information recording / reproducing apparatus according to the present invention comprises:
The first support portion having the guide shaft and the bearing, and the second support portion provided separately from the first support portion constitute support means, and the rotational moment about the guide shaft is mounted on the drive means. By acting on the connecting portion of the mounting table, the mounting table can be maintained in a stable posture, whereby the thickness of the mounting table can be suppressed small, and the thickness can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment.

FIG. 2 is a side sectional view.

FIG. 3 is a perspective view of a second embodiment.

FIG. 4 is a side sectional view.

FIG. 5 is a plan view of a conventional example.

FIG. 6 is a perspective view.

FIG. 7 is a front side view of the mounting table.

FIG. 8 is a side sectional view of the mounting table.

[Explanation of symbols]

 Reference Signs List 30 optical head 31 mounting table 33, 60 support member 34, 61 drive means 36, 37 holding plate 38 pressing member 40 arm portion 41, 42 plate member 46, 63 guide path 47 compression coil spring 48 device base 49 guide shaft 50 slide bearing 52 steel belt 55, 69 motor 56 light shielding plate 57 optical detector 62 U-shaped member 64 lead screw 65 lead pin

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI G11B 19/20 G11B 19/20 S

Claims (5)

[Claims] 1. A mounting table for holding a card-shaped information recording medium, driving means for linearly moving the mounting table in a direction perpendicular to an optical head, and supporting means for supporting the mounting table. In the information recording / reproducing apparatus, the supporting means comprises: a first support portion having a guide shaft fixed to the device base and a bearing provided on a mounting table; an arm portion laterally protruding from the mounting table; An information recording / reproducing apparatus, comprising: a second support portion comprising a guide groove provided on a device base sliding the portion. 2. The information recording / reproducing apparatus according to claim 1, wherein the mounting table is moved in a direction orthogonal to an information track of the card-shaped information recording medium, and the arm is provided on a card insertion side of the mounting table. . 3. A mounting table for holding a card-shaped information recording medium, driving means for linearly moving the mounting table in a direction perpendicular to the optical head, and supporting means for supporting the mounting table. In the information recording / reproducing apparatus, the support means includes a first support portion having a guide shaft fixed to the device base and a bearing provided on the mounting table, and a second support portion provided separately from the first support portion. And a connecting portion between the driving means and the mounting table is provided at a position facing the second support portion with the first support portion interposed therebetween, and a rotational moment generated around the guide shaft is provided. An information recording / reproducing apparatus, wherein an acting force is applied to one of the connection portion and the second support portion. 4. The information recording / reproducing apparatus according to claim 3, wherein the means for applying an acting force to the connecting portion is an elastic member comprising a lead pin or a leaf spring. 5. The second support portion comprises an arm protruding laterally from the mounting table, and a guide groove provided on a device base that slides the arm, and forms the guide groove, and 4. The information recording / reproducing apparatus according to claim 3, wherein one of the sliding surfaces facing the arm is urged in a direction to clamp the arm.