JPS63201951A - Disk surface detecting device - Google Patents

Abstract

PURPOSE:To easily discriminate both sides of a disk by detecting both sides of the disk stored in a disk driving device by means of the operation order of optical switches in which dousers fixed to switching levers execute light- cutting. CONSTITUTION:If the cartridge 1 inserted into the disk driving device is in a right side, or in a back side, the dousers 11 and 16 are fixed to the shutter switching levers 10 and 15 opening and closing the shutter 2 of the cartridge 1, and the optical switches 12 and 17 are provided which are operated by the dousers 11 and 16 after rotating the switching levers 10 and 15, whereby the disk surface is detected by the operation order. Thus, the both sides of the inserted cartridge are judged by the operation order of two optical switches 12 and 17, the malfunction of the switching levers 10 and 15 is judged by the non-operation of the both optical switches 12 and 17.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to the front and back surfaces of a disk cartridge (hereinafter referred to as a cartridge) inserted into a disk drive device, in other words, optical disks, magnetic disks, etc. accommodated in the cartridge. The present invention relates to a disc surface detection device for detecting the front and back surfaces of a recording medium.

(Prior art) In recent years, recording media have become more sophisticated and smaller, and for example, microfloppy disks are now available in 8,89 countries (3, 89 countries).
5-inch) diameter cartridge structures are likely to become mainstream in the future.

Traditionally, this type of cartridge-based disc.

In order to access from the front and back sides, pickup windows (hereinafter referred to as access windows) are formed on the front and back sides of the cartridge body, and shutters are provided to simultaneously open and close the access windows on both the front and back sides.

FIG. 3 is a plan view showing such a conventional cartridge, where (a) and Cb> are respectively when the shutter is closed;
and open case are shown.

1 is a cartridge body, and 2 is a shutter.

3 is a shutter trigger provided for opening the shutter 2; 4 is a shutter trigger provided for accessing the disc 5 stored therein;
An access window is provided on the surface of the cartridge body 1 and is also formed on the back surface. 6 is a shutter opening/closing groove, and 7 is a magnetic hub corresponding to a magnetic clamp provided on the disk drive side.

The present invention detects the front and back sides of a cartridge having such a structure, and hence the front and back sides of the disc contained therein.

By the way, when using such a cartridge that is accessible from both sides, it is necessary to indicate the disk surface to be accessed. Note that since the disk surface and the cartridge surface are the same as the front and back sides, they will be described below as the front and back sides of the cartridge.

Conventionally, in this type of cartridge, the above-mentioned detection or display of the front and back surfaces is determined by a separate mechanical or optical means, or by reading information recorded on a disk of a recording medium. Met.

(Problem to be Solved by the Invention) Therefore, if another means is configured in the disk drive device,
A complex mechanism must be implemented in a small space, and it takes a considerable amount of time to read the data and other information recorded on the disk and determine whether it is front or back. There are drawbacks that require

The present invention aims to solve the above-mentioned conventional drawbacks, and aims to provide a disk surface detection device that can inexpensively determine the front and back sides of a disk inserted into a disk drive device.

(Means for Solving the Problems) The present invention achieves the above-mentioned object by a shutter opening/closing lever (hereinafter referred to as This is accomplished by fixing a light-shielding plate to an opening/closing lever, providing an optical switch that is operated by the light-shielding plate when the opening/closing lever rotates, and detecting the disk surface based on the order of operation of the light-shielding plate.

(Function) With the above-described configuration, the present invention determines whether the cartridge is inserted in the front or back direction based on the operating order of the two optical switches, and malfunction of the opening/closing lever can be determined by the fact that both of the optical switches stop operating.

(Example) Hereinafter, the present invention will be explained by using examples and drawings.

FIG. 1 is a plan view of the main parts showing the configuration of a disk surface detection device according to an embodiment of the present invention. The tip of a cartridge to be inserted into a disk drive device is also shown, and the symbols not explained below refer to the previous explanation. Use it.

The other reference numeral 8 is a roller, which rotates about a support shaft 9 and is supported at the tip of an opening/closing lever 10 for opening and closing the shutter 2. 11 is a light shielding plate fixed to the opening/closing lever lO, and 12 is an optical switch operated by the light shielding by the light shielding plate 11, which is composed of an optical sensor such as a photointerrupter.

In exactly the same way, 13 is another roller, which rotates around the support shaft 14 and is supported at the tip of the opening/closing lever 15.
16 is a light shielding plate fixed to the opening/closing lever 15, and 17 is a corresponding optical switch. Moreover, 18 is a notch formed on the cartridge main body 1 provided corresponding to the shutter trigger 3 of the shutter 2.

If a cartridge is inserted from the direction of arrow A into a disk drive device having such an opening/closing lever 10.15,
At the beginning of the insertion process, as shown by the solid line, one roller 8 fits into the shutter trigger 3, and the other roller 13
is on the front edge of the shutter 2 (the tip in the figure).

As more cartridges are inserted, rollers 8 and 13
move on an arc whose radius is the length of the opening/closing lever 10 or 15 with the support shafts 9 and 14 as rotation axes,
When the insertion is completed, the other roller 13', which did not contribute to opening the shutter 2, fits into the notch 18' formed in correspondence with the shutter trigger 3 on the cartridge body 1, as shown by the two-dot chain line, and the When opening/closing levers 10', 15'
The light shielding plates 11' and 16' are both optical switches 1 and 16' respectively.
2.17, it interrupts their optical paths and together generates an output as a sensor.

In the above-mentioned operation, at the initial stage of insertion of the cartridge body 1 shown by the solid line in the figure, one roller 8 is at the shutter trigger 3 and the other roller 13 is at the front edge of the cartridge body 1, so that the crossing angle of the opening/closing lever l0915 is Therefore, at the initial stage of insertion, the degrees of insertion of the light shielding plates 11 and 16 are different, so one of the light shielding plates 16 is the optical switch 1.
Even if the optical switch 7 is shielded from light, the other light shielding plate 11 does not shield the optical switch 12 from light.

As mentioned above, in the initial stage of cartridge insertion, the opening/closing lever 1
There is a difference in the degree of rotation of 0.15, and therefore the timing of operation of the optical switches 12 and 17 is different, and the order of operation is determined by the direction in which the shutter 2 opens.

FIG. 2 shows a case where the shutter malfunctions in opening and closing.

This is a case where the opening/closing lever 10 that should open the shutter accidentally rides on the shutter 2.

In this case, the light shielding plate 11.16 is connected to both optical switches 12.1 and 12.1.
However, when the cartridge insertion is completed, the light shielding plate 11.16 can penetrate the optical switch 12.17 and operate it, thus making it impossible to detect the disk surface.

As described above, the present invention provides optical switches 12 and 17 that operate in different orders depending on the front and back sides of the inserted cartridge, and detects the disk surface to be accessed based on the order of operation. It is also possible to detect whether it is complete or not.

(Effects of the Invention) As described in detail above, according to the present invention, an optical switch is provided in which a light-shielding plate fixed to an opening/closing lever blocks light from both sides of a cartridge inserted into a disk drive device, and hence a disk stored therein. Detection is performed based on the order of operation, and if a side of the disc that is different from the one that should be accessed is inserted, the cartridge can be ejected before loading is completed, and it is also possible to detect abnormalities in the opening and closing of the cartridge shutter. At that time, the cartridge can be ejected to avoid damage to the optical pickup and magnetic head.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the main components of an embodiment of the present invention, FIG. 2 is a plan view illustrating detection errors of the present invention, and FIG. 3 is a plan view showing a cartridge. 1... Cartridge body, 2 °°° shutter,
3...Shutter trigger, 4...Access window,
5... Disc, 6... Shaft opening/closing groove, 7.
...Magnetic material hub, 8゜13...Roller, 9,14
...Support shaft, 10°15...Shutter opening/closing lever,
(abbreviated as opening/closing lever), 11.16... light shielding plate, 12
．． 17... Optical switch, 18... Notch. Patent applicant Matsushita Tsushin Kogyo Co., Ltd. Figure 1 1-4 Cartridge connector 21. -Nyatta 3-・Shikitsuktorikaku 10.15 =-Shivtsu 71%F11111 L bar 11.16++-Strength light resistance 12.17=-4 pieces with special leaves Fig. 2 Fig. 3 (a) (b ) and others

Claims (1)

[Claims] In the disk drive device, a shutter opening/closing lever is provided for each of the front or rear side of the disk cartridge to be inserted, a light shielding plate is fixed to each of the shutter opening/closing levers, and an optical switch is installed in correspondence with the light shielding plate. When the shutter opening/closing lever is rotated when a disk cartridge is inserted, the light shielding plate fixed thereto blocks light and operates the corresponding optical switch, and the operating order of these switches is determined by the disk cartridge being inserted. A disc surface detection device characterized in that the disc surface is detected by utilizing changes in the front or back surface depending on the case.