JPH0656628B2 - Information recording / reproducing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an information recording / reproducing apparatus for recording and / or reproducing information by reciprocally moving an information recording medium with respect to a recording and / or reproducing head. In particular, the present invention relates to an information recording / reproducing apparatus capable of recording and / or reproducing good information by eliminating lateral movement and swinging of the recording medium which occur when the recording medium is reciprocally moved.

[Prior Art] Conventionally, various forms such as a card form and a disc form are known as a form of a recording medium used for recording information using a light beam and reproducing it using the thus recorded light beam. There is. Among them, a card-shaped optical information recording medium (hereinafter referred to as “optical card”) is expected to be in great demand as a recording medium that is easy to manufacture, has good portability, and has good accessibility. .

In the optical card, the information tracks are formed in a linear shape, and a plurality of information tracks are arranged in parallel in a predetermined area on the card surface. Therefore, in an information recording / reproducing apparatus using an optical card as a recording medium, the light beam spot is relatively continuously moved in the direction of the information track on the surface of the optical card, at which time information is recorded or reproduced. After the movement of a predetermined distance, the light beam spot is moved on the surface of the optical card relative to the information track in a direction traversing the information track, so that the information is not recorded or reproduced. Then, it is again moved relatively continuously 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 transverse to the direction are similarly performed. And are alternately repeated a desired number of times.

An information recording / reproducing apparatus proposed by the applicant of the present invention having such an operation is shown in FIGS. 6 (a) and 6 (b).

An optical head 12 is provided to record or reproduce information on the optical card 10. The optical card 10 moves between the frame 14 and the leaf spring 16 in the arrow ab direction. The leaf spring 16 acts to press the optical card 10 against the frame 14.

A drive system and a transmission system for moving the optical card 10 in the direction of the arrow ab are guide rollers 18a and 18b arranged side by side at a fixed minute interval on the frame 14 (the guide roller 18b is the optical card 10 in the figure). (Not shown), a drive motor (not shown) for rotating the guide roller 18a, and a pulley 2 provided for transmitting the rotation to the guide roller 18a.
0 and a drive belt 22.

With such a configuration, when the guide roller 18a rotates with the rotation of the drive motor, the guide rollers 18a and 18b are rotated.
The optical card 10 inserted between the frame 14 and the leaf spring 1
Move between 6 in the direction of arrow ab.

[Problems to be Solved by the Invention] When the optical card 10 moves in the arrow b direction in the optical card feeding mechanism configured as described above, as shown in FIG. A frictional force F ₁ is generated on the contact surface between the plate spring 16 and the leaf spring 16, and this frictional force F ₁ and the guide roller 18 a
The momentum force in the direction of arrow M is generated in the optical card 10 by the propulsive force T due to the rotation of the plate spring 16 and presses the leaf spring 16 in the direction M. At this time, a slight gap is formed between the frame 14-side moving end 10b of the optical card 10 and the frame 14. At this time, the frictional force F ₂ generated between the optical card 10 and the frame 14 is the optical card. When the contact state between the optical card 10 and the leaf spring 16 is changed at the same time, the frictional force F ₁ is reduced and the optical card 10 is separated from the arrow M by the opposite action. A horizontal shake occurs in the opposite direction. In this way, the optical card 10 behaves like a swinging motion as it moves.

Further, when the optical card 10 is reversed in the moving direction and is sent in the direction of the arrow a, the frictional force F ₁ acts in the direction opposite to the arrow, and at this time, the tip portion 10a of the optical card 10 is moved to the frame 14
To contact. When the optical card 10 is moved in the a direction, the end portion of the optical card 10 in the a direction swings like the above.

However, when recording or reproducing information on the medium surface of the optical card 10 in such a situation, an optical head that should perform auto-focusing control, auto-tracking control, and control for keeping the optical card feed speed constant. However, a large disturbance occurs, and it is difficult to perform appropriate drive control for such a disturbance.

In particular, if the above-described disturbance occurs during tracking control, the information tracks that should be formed linearly during recording will be formed in a meandering state. Further, even during reproduction, the light beam emitted from the optical head 12 cannot accurately scan the information track due to the disturbance as described above, which causes a problem that read errors increase. It was

However, in order to eliminate such a drawback, the optical card 10 moving in the direction of the arrow ab along the frame 14 as the guide member always keeps contact with the frame 14 having the linear guide surface. If possible, the optical card 10 can have a linear movement locus with respect to the optical head 12, which is convenient.

The present invention has been made in view of the above problems, and prevents sideways movement or swinging of the optical card, which has been a cause of inconvenient disturbance when recording or reproducing information on the optical card. It is an object of the present invention to provide an information recording / reproducing apparatus equipped with a card feeding mechanism capable of recording and / or reproducing accurate information.

[Means for Solving Problems] According to the present invention, in order to achieve the above object, information for recording and reproducing information by reciprocally moving an information recording medium with respect to a recording and / or reproducing head. In the recording / reproducing apparatus, when the medium is repeatedly moved back and forth, a guide member provided so as to always contact and guide the entire area of one side of the medium, and always contact the entire area of the side opposite to the one side of the medium. And a drive roller for reciprocating the medium along the guide member, the drive roller being in a direction along the guide member. An information recording / reproducing apparatus, characterized in that the pressing force of the biasing means is arranged near the center of the guide member and increases from the center to both ends in the direction along the guide member. Be done.

[Operation] As described above, the apparatus of the present invention is provided with the guide member which is always in contact with the entire area of one side of the medium in the moving direction of the medium in order to guide the movement of the information recording medium. On the other hand, since the opposite side of the guide member is always in contact with the entire area of the side opposite to the one side of the medium, the urging means is provided to urge the medium toward the guide member side. Can be moved in a predetermined direction by the driving roller while being guided between the guide member and the urging means.

In addition, since the biasing means is configured to increase the pressing force on the medium from the central portion to both end portions in the direction along the guide member, it is possible to effectively suppress the change in the movement of the medium due to the movement of the medium. Therefore, it is possible to prevent the medium from wobbling and swinging, which are disadvantages of the conventional apparatus, and to advance the medium linearly with respect to the moving direction.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the attached drawings, FIGS. 1, 2, 3, 4, and 5 are perspective views showing essential parts according to a plurality of embodiments of the present invention, and each drawing number indicates each embodiment. Indicates the example number.

In these drawings, a leaf spring as a biasing means and an optical card as an information recording medium which constitute the main part in each embodiment are shown, and other guide members, driving means, etc. are the same as those of the conventional device. However, the illustration is omitted in each drawing.

Further, parts having the same functions as those of the respective parts in FIG. 6 showing the conventional device are designated by the same reference numerals.

Embodiment 1 As shown in FIG. 1, a leaf spring 16 having an appropriate elasticity is bent such that both ends 16a and 16b in the longitudinal direction thereof have a smoothly curved shape toward the optical card 10 side. There is.

This leaf spring 16 has a screw hole 17 at a required position in the lower portion in the longitudinal direction.
Is provided and is fixed to the main body (not shown) by bolting or other appropriate means.

The force for biasing the optical card 10 to the frame 14 (indicated by the one-dot chain line in the figure) by the leaf spring 16 having the above-described shape is the direction of the leaf spring 16, that is, the direction of the frame 14 as the guide member; Along the line from the center to both ends. In the present embodiment, the drive roller as the drive means is arranged near the central portion of the frame 14 in the direction along the frame 14, like the guide roller 18a of the conventional device shown in FIG.

Therefore, when the optical card 10 moves in the direction of the arrow b in the figure along the frame 14, the leaf spring curved portion 16b resists the moment force acting to push the optical card tip portion 10b toward the leaf spring 16 side. Since the optical card 10 is urged toward the frame 14 by the optical card 10, the optical card 10 keeps contacting the frame 14 with the entire area of one side and the leaf spring 16 with the entire area of the other side. It can move forward in the direction of arrow a.

Alternatively, when the optical card 10 moves in the direction of the arrow a along the frame 14, the leaf spring curved portion 16a resists the moment force acting to press the optical card rear end portion 10a toward the leaf spring 16 side. Since the optical card 10 is urged toward the frame 14 by the optical card 10, the optical card 10 keeps contacting the frame 14 with the entire area of one side and the leaf spring 16 with the entire area of the other side. , Can move forward in the direction of arrow b.

Further, even when the movement of the optical card 10 is reversed from the b direction to the a direction, or when the optical card 10 is reversed from the a direction to the b direction, the leaf spring curved portion 16a or 16b acts in the same manner as described above to face the optical card 10. Each of the two sides can be kept in contact with the frame 14 and the leaf spring 16 over the entire area.

Therefore, the optical head 1 provided near the surface of the optical card 10
The light beam emitted from 2 (see FIG. 6) can draw a substantially linear trajectory without meandering with respect to the optical card 10 when the optical card 10 moves in the direction of arrow ab.
This means that in the case of forming an information pit row on the optical card 10, it is possible to form a substantially linear information pit row, and the information recorded in this way is reproduced. Accurate scanning and drive control, especially tracking control, can be performed even at times.

Embodiment 2: 2 In another embodiment of the present invention shown in FIG. 2, the leaf spring 16 as the urging means has both end portions 1 in the longitudinal direction thereof.
On the side opposite to the frame 14, 6a and 16b are formed as, for example, a triple leaf spring 16. Moreover, since the leaf springs 16 are arranged so that the number of leaf springs stacked increases from the central portion to the end portion, the force for pressing the optical card 10 toward the frame 14 is the central portion of the leaf springs 16. It gradually increases as it goes to both ends. The other actions of the leaf spring 16 and the method of attaching the leaf spring 16 to the main body are the same as those in the first embodiment, but in the present embodiment, the leaf springs 18a, 16b to be attached to both end portions 16a, 16b of the leaf spring, The number of plates of 18b is 2 as shown in the figure.
The number of sheets is not limited to this, and may be less than or more than that. Further, by changing the material, thickness, length or the like of these leaf springs 18a, 18b, it becomes possible to finely adjust the pressing force on the frame 14 side.

Embodiment 3 3 As shown in FIG. 3, in this embodiment, the leaf spring 16 is used.
Is bent into a smooth curved shape as a whole in the longitudinal direction. Moreover, what is significantly different from the above-described two embodiments is the state of attachment to the main body (not shown). The leaf spring 16 in this embodiment has a leaf spring 1 only near the central portion.
6 has a projecting piece 19 extending somewhat from this 6, and this projecting piece 19 is provided with, for example, two mounting holes 17. The body of the leaf spring 16 is mounted by bolting or the like through the mounting hole 17.

Therefore, the leaf spring 16 of the present embodiment can be freely bent in its entire shape, particularly in the longitudinal direction thereof, so that the pressing force of the leaf spring 16 against the optical card 10 at an arbitrary portion can be adjusted appropriately, and Easy to adjust.

Other functions and the like of this embodiment are the same as those in each of the above embodiments.

Embodiment 4 FIG. 4 is a perspective view from the opposite direction to the illustration of the above embodiment for the purpose of explaining this embodiment.

As shown in the figure, a mounting hole 17 is provided at a required portion in the lower part of the leaf spring 16 in the longitudinal direction, and the leaf spring 16 is bolted to the main body through the mounting hole 17 or the like. Can be fixed.

A coil spring 20 is attached to a required portion of the leaf spring 16 of the present embodiment on the side opposite to the frame 14. The coil spring 20 is attached to one side of the mounting hole 17, and the other end of the coil spring 20 is fixed to a main body (not shown) to constantly press the leaf spring 16 toward the frame 14.
Further, the coil springs 20 may be configured so that they have different elastic forces. At both ends of the leaf spring 16 in the longitudinal direction, in order to make the pressing force against the optical card 10 stronger than at the central portion, as in the above embodiments, a large elastic force is applied from the central portion of the leaf spring 16 to both ends. The coil spring 20 may be included.

In this embodiment, the coil spring 20 is attached to the leaf spring 16 as described above, which makes the configuration somewhat complicated. However, the pressing force for an arbitrary portion of the leaf spring 16 can be changed by replacing the coil spring 20. Also, the coil springs 20 can be replaced relatively easily even after use, and the performance management of each coil spring 20 can be easily performed.

Other functions and the like are the same as those in the above-mentioned embodiments.

Example 5 This example shown in FIG. 5 is an example in which an elastic cushion material or damper material is used instead of the coil spring 20 in the example 4:

When the sponge 21 having a shock absorbing property is used as such an elastic member, it is possible to suppress a minute vibration generated in the leaf spring 16 or the optical card 10 or the like, and to stably record or reproduce information. More convenient.

[Effects of the Invention] As described above, the information recording / reproducing apparatus of the present invention moves the medium relative to the optical head provided for recording or reproducing information on the information recording medium. Since the medium is provided with the feeding mechanism capable of preventing slight vibration, lateral shake, and swinging, it is possible to form a substantially linear information pit row having no meandering with respect to the medium, and Since the optical head can be accurately scanned with respect to the formed pit row, stable tracking control, focusing control and medium movement speed control can be performed, and good information recording or reproduction is performed. be able to.

[Brief description of drawings]

1 to 5 are perspective views of main parts of various embodiments of the present invention, and FIGS. 6 (a) and 6 (b) are schematic plan views of a conventional device. 10 ... Optical card, 12 ... Optical head 14 ... Frame, 16 ... Leaf spring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Sho 59-159650 (JP, U) Steady 51-148924 (JP, U) Shoko 51-12099 (JP, Y2)

Claims (1)

[Claims] 1. An information recording / reproducing apparatus for recording and / or reproducing information by reciprocally moving an information recording medium with respect to a recording and / or reproducing head, wherein when the medium is repeatedly reciprocated, the entire area of one side of the medium is constantly A guide member provided to abut and guide; a biasing unit for constantly abutting the entire region of one side of the medium facing the one side to press the medium being reciprocally moved toward the guide member; A drive roller for reciprocating the medium along the guide member, the drive roller being arranged near the central portion of the guide member in the direction along the guide member, and the pressing force of the urging means is the guide member. An information recording / reproducing apparatus characterized in that the number increases in the direction from the center to both ends.