JPH0453006B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an information reproducing device that reads information recorded on a card-type optical recording medium.

[Prior Art] In recent years, card-type optical recording media have attracted attention as a large-capacity memory to replace magnetic cards and IC cards, and various types of optical recording media have been proposed. However, nothing has been put into practical use yet. This is because simple writing and reading devices have not been developed. In other words, in order to popularize this type of recording medium, it is necessary to develop writing devices, reading devices, and especially reading devices that are inexpensive, small, and lightweight; This is because it has not been done.

Conventionally proposed reading devices move a holder holding a card-type optical recording medium in a specific direction, for example,
Reading scanning is performed by moving the optical system of the reading head linearly along the longitudinal direction of the optical recording medium (referred to as the X axis) and moving the optical system of the reading head in a direction perpendicular to this (referred to as the Y axis). It is configured to be carried out.

[Problems to be Solved by the Invention] However, the conventional reading device has a holder that holds an optical recording medium, a Y-axis moving mechanism including a guide frame and a drive unit, an optical system and its adjustment drive device. The structure is such that a reading head having a reading head is mounted thereon. Therefore, a large weight is placed on the holder, and the structure of the holder is required to have a certain degree of mechanical rigidity, resulting in an increase in size and weight. As a result, the guide frame on the X-axis side also needs to be able to withstand a large amount of weight, and the drive device that moves the holder also needs a large output, and the drive device is large as a whole. This results in a heavy device.

Therefore, with conventional reading devices, it has been extremely difficult to create a simple device that can be easily carried. Moreover, since the weight of the moving parts is large, the inertia is large, making it difficult to control starting and stopping, resulting in poor accuracy.

The present invention has been made to solve the above-mentioned problems.The present invention provides a moving mechanism on the reading head side and a moving mechanism on the optical recording medium holder side independently, thereby significantly reducing the weight of each. The purpose of the present invention is to provide an information reproducing device whose driving device is also small and lightweight, making it easy to carry as a whole, and having small inertia, so that starting and stopping can be controlled easily and accurately. shall be.

[Means for Solving the Problems] The present invention provides an information reproducing apparatus for reading information recorded on a card-type optical recording medium. a holder moving guide mechanism that moves the holder while guiding the holder; and an optical fiber holder that holds the optical fiber whose base end is connected to the light emitting section and the light receiving section of the reading head so that the distal end side thereof faces the data track of the optical recording medium. and an optical fiber movement guide mechanism that moves the optical fiber holding part while guiding it in a direction perpendicular to the moving direction of the holder, and moves the light emitting part and the light receiving part of the reading head to a non-moving part. It is characterized in that it is provided and configured.

[Function] In the present invention, only the holder and the optical recording medium placed and held are supported by the holder movement guide mechanism, so that excessive weight is not applied to the guide mechanism. As a result, a drive device such as a motor for moving the holder can also be small and lightweight.

Further, on the reading head side, only the lightweight optical fiber is supported by the optical fiber movement guide mechanism, and the heavy light emitting section and light receiving section are not placed on the optical fiber movement guide mechanism but are fixedly supported. Therefore,
Since only a light load is applied to the optical fiber movement guide mechanism, the structure can be simple and the structure can be reduced in size and weight.

As described above, according to the present invention, both the optical recording medium side and the reading head side can be configured to be extremely lightweight.
The overall weight can be set to a level that makes it easy to carry. Further, in both cases, the inertia of the moving parts is small, so starting and stopping control can be performed easily and accurately.

[Example] An example of the present invention will be described with reference to the drawings. In this embodiment, an optical memory card C is used as the card-type optical recording medium.

<Configuration of the Embodiment> FIG. 1 is a plan view showing an embodiment of the information reproducing apparatus of the present invention, FIG. 2 is a cross-sectional view thereof, and FIG. 3 is a diagram showing the optical fiber movement guide mechanism used in this embodiment. FIG. 4 is a plan view showing the main parts, FIG. 4 is a front view thereof, and FIG. 5 is an enlarged sectional view showing an optical fiber holding part used in this embodiment.

In these figures, the information reproducing apparatus of this embodiment linearly guides the holder 20 that holds the optical memory card C along the longitudinal direction (X-axis direction) of the housing 1 in a direction perpendicular to the data track. A holder movement guide mechanism 10 is provided to move the holder while moving the holder. Further, an optical fiber holding section 33 for holding the tip end 32a of the optical fiber 32 in a position facing the holder 20 in the center of the housing so as to face the optical memory card C data track, and the optical fiber holding section 33 are provided. Optical fiber movement guide mechanism 40 that moves while guiding linearly in the direction of the data track
and.

Furthermore, a light emitting section/light receiving section 31, which together with the optical fiber 32 constitutes a reading head, is fixedly provided at one end of the housing 1.

The light emitting section/light receiving section 31 includes a laser emitting element, a light receiving element, a driving circuit for these elements, and an information reproducing circuit (none of which is shown) that reproduces information from the detected reflected signal. Data track irradiation and detection of its reflected light,
It has the function of reproducing information.

The holder movement guide mechanism 10 includes a guide frame 11 provided along both sides of the housing 1 in the longitudinal direction, and an It is bridged between a shaft servo motor 12, a pulley 13 rotationally driven by the motor 12, and another pulley 14,
Wire 15, a part of which is connected and fixed to holder 20
It is composed of:

The holder 20 includes a support portion 21 that movably supports itself on the guide frame 11, and a support portion 21 that supports the holder 20 movably on the guide frame 11, and the wire 15.
and the connecting part 22 that connects and fixes the optical memory card C.
a card accommodating section 23 that accommodates the above-mentioned accommodating section 23;
The window 24 is provided at the bottom of the window 24.

The optical fiber holding section 33 holds the tip 32a of the optical fiber 32 substantially perpendicular to the window 24, and its height can be adjusted as appropriate.

The height adjustment is performed by loosening the bolt 34 that presses and fixes the fiber 32 through a cushion material 38 such as felt, and moving the optical fiber 32 in the length direction.

Further, on the side surface of the optical fiber holding part 33, a collar 3 is provided.
6 is provided. This collar 36 allows the optical fiber holding section 33 to be movably supported by the guide frame 41 of the fiber movement guide mechanism 40 . A through hole 3 is provided in the center of the optical fiber holding portion 33 in the direction of movement thereof.
5 is provided, and a wire 46 is inserted through this through hole 35 and fixed to a bolt 37.

The optical fiber 32 has one for irradiation light and one for reflected light.
They are gathered into a bundle, and both have an opening at the tip 32a.

The optical fiber movement guide mechanism 40 includes the guide frame 1
A guide frame 41 for guiding the optical fiber tip 32a in a direction perpendicular to the optical fiber 1 is provided at approximately the center of the housing 1. The guide frame 41 is made of members arranged in parallel, and the optical fiber 32 is passed through the gap therebetween.

The optical fiber holding section 33 is supported by placing the collar 36 on this parallel member.

At both ends of this guide frame 41, pulleys 42, 42 are provided.
is arranged, and a wire 46 is spanned parallel to the guide frame 41. This wire 46 is connected to another pulley 4
3 and is spanned over a pulley 44. This pulley 44 is rotationally driven by a Y-axis stepping motor 45 to move a wire 46.

<Operation of the embodiment> The information reproducing device configured as described above allows
To read information from an optical memory card, proceed as follows.

First, the optical memory card C is placed in the card accommodating portion 23 of the holder 20 with its data recording surface facing downward. Thereby, the data recording surface can be viewed from the bottom side through the window 24.

Then, the wire 1 is moved by the X-axis servo motor 12.
5 to set the holder 20 to the initial position. Also, the wire 4 is controlled by the Y-axis stepping motor 45.
6, the optical fiber holding portion 33 is set to the initial position. At this time, each initial position is detected by a limit switch or the like (not shown), and the motors are automatically stopped at the respective positions.

When reading, the Y-axis stepping motor 45
is rotated at a constant speed, and this rotation is transmitted to the wire 46 via the pulley 44 and converted into movement of the wire 46 in the length direction. As a result, the wire 4
Optical fiber holding part 33 to which a part of 6 is fixed
is moved along the guide frame 41.

At this time, a laser beam is sent from the issuing section/light receiving section 31 through the optical fiber 32, and the optical memory card C is sent from the fiber tip 32a through the window 24.
irradiate the data track. This irradiation light is reflected with a reflectance depending on the recording state of data on the data track, and the reflected light enters the fiber tip 32a and is sent through the optical fiber 32 to the light receiving section. As a result, the data recorded on the data track is read.

When the data for one track is read in this way, the stop signal for that track is read, and the control device (not shown) causes the X-axis servo motor 12 to move the holder 20 to the next track via the wire 15. Move it to the position.

At this time, to read data randomly from the tracks, count the number of tracks and move the X-axis servo motor 1 to the position of the track with the desired number.
2 should be driven.

Further, a control device (not shown) reversely rotates the Y-axis stepping motor 45 to move the optical fiber holding section 33 to the initial position of the data track where data is to be read.

Thereafter, the data on the data track is read in the same manner as described above.

By the way, in this embodiment, the holder 20 is loaded with only its own weight and the weight of the optical memory card, so it is extremely lightweight, and most of the load is not placed on the guide frame 11, the wire 15, and the X-axis servo motor 12. It doesn't put a burden on you.

Similarly, in the optical fiber movement guide mechanism 40, since only the weight of the optical fiber 32 and the optical fiber holding part 33 is applied to the guide frame 41, most of the weight is applied to the guide frame 41, the wire 46, and the optical fiber holding part 33. It doesn't put any burden on you.

Therefore, they have the advantage of being able to be made of lightweight materials and being miniaturized. Furthermore, since the inertia is reduced, control becomes easier when starting and stopping.

<Modifications of Embodiments> In the above embodiments, the holder and the optical fiber holding portion are made of wires, but other means may be used.

Further, in this embodiment, an optical memory card is used as the optical recording medium, but the present invention can be applied to other forms as well.

Further, in this embodiment, the optical fiber is moved in the direction of the data track, but the present invention is not limited to the moving direction. For example, the optical fiber is moved in the direction of the data track by moving the holder in the direction of the data track. It may also be configured to move in a direction perpendicular to the track.

[Effects of the Invention] As explained above, the present invention provides the moving mechanism on the reading head side and the moving mechanism on the optical recording medium holder side independently, thereby significantly reducing the weight of each, and also reduces the weight of each. The device is also smaller and lighter, making it easier to carry as a whole, and its inertia is small, making it easy to control starting and stopping with high precision.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the information reproducing apparatus of the present invention, FIG. 2 is a cross-sectional view thereof, and FIG. 3 is a plan view showing the main parts of the optical fiber movement guide mechanism used in this embodiment. , FIG. 4 is a front view thereof, and FIG. 5 is an enlarged sectional view showing the optical fiber holding portion used in this embodiment. 1... Housing, 10... Holder movement guide mechanism, 1
1... Guide frame, 12... X-axis servo motor, 1
3, 14...Pulley, 15...Wire, 20...
Holder, 21... Support part, 22... Connection part, 23
... Card accommodating section, 24 ... Window, 31 ... Light emitting section/light receiving section, 32 ... Optical fiber, 32a ... Optical fiber tip, 33 ... Optical fiber holding section, 3
4, 37... Bolt, 35... Through hole, 36...
Tsuba, 38... cushion material, 40... optical fiber movement guide mechanism, 41... guide frame, 42, 43, 4
4...Pulley, 45...Y-axis stepping motor, 46...Wire.

Claims (1)

[Scope of Claims] 1. An information reproducing device that reads information recorded on a card-type optical recording medium, comprising: a holder movement guide mechanism that linearly guides and moves a holder that holds and holds an optical recording medium; an optical fiber holder that holds an optical fiber whose ends are connected to a light emitting section and a light receiving section of a reading head so that its tip side faces a data track of the optical recording medium; What is claimed is: 1. An information reproducing device comprising: an optical fiber movement guide mechanism that moves the reading head while guiding the reading head in a direction perpendicular to the reading head;