JPS6314366A - Shutter opening/closing detector for disk cartridge - Google Patents

Abstract

PURPOSE:To detect the opening/closing of a shutter with thin profile and high reliability by driving a lever with the shutter in closing the shutter so as to allow the light shield plate provided to the said lever to shut the light path of a photo interrupter. CONSTITUTION:When the shutter 5 is slided in the direction of arrow Y by a shutter opening/closing device, a long hole 2 is formed. On the way of the shutter 5 in sliding in the arrow Y, the shutter 5 drives a roller 13 and drives the lever 11 in the arrow Y, the light shield plate 14 formed integrally with the lever 11 is driven counter clockwise together with the lever 11 thereby shutting the light passing through the recess of the photo interrupter. In such a way, the switching of the shutter 5 is detected depending whether the light passing through the recess of the photo interrupter is shut or not. When the shutter 5 is slided and the long hole 2 is formed, a disk in the case 1 is clipped by a turntable entering the case 1 via the long hole 2 and the clamp member, the disk is driven or the head enters the case via the long hole 2 to attain recording or reproduction.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a disc cartridge shutter opening/closing detection device for detecting opening/closing of a shutter of a disc cartridge housing a disc such as a magnetic disc or an optical disc.

BACKGROUND OF THE INVENTION FIG. 2 shows a conventional disc car (IJ) shutter opening/closing detection device. In FIG. 2, reference numeral 1 denotes a case in which a disc-shaped disk is housed, and long holes 2 are formed in the front and back surfaces of the case 1. 3 is the above case 1
A slider 5 slidably supported by a stepped portion 4 on one side.
is a shutter made of a metal plate bent into an opening shape, and this shutter 5 is attached to the slider 4. The shutter 5 slides in the direction of the arrow x to open and close the elongated hole 2 of the case 1. A spring (not shown) is housed in the case 1, and the shutter 5 is biased by this spring to normally close the elongated hole 2 and protect the disk inside the case 1.

Reference numeral 66' denotes a light emitting element and a light receiving element which are provided facing each other in the recording/reproducing apparatus, and the light emitted from the light emitting element 6 passes through the stepped portion 4 of the case 1 and is received by the light receiving element 6'. .

When the disk cartridge is inserted into the recording/reproducing apparatus and set at a predetermined position, the shutter 5 is opened by a shutter opening/closing mechanism (not shown) and slides to the position shown by a dashed line 5'. While the shutter 5 is sliding to the position indicated by the dashed-dotted line 5', the light emitted from the light emitting element 6 is blocked by the shutter 5 and no longer enters the light receiving element 6', and it is detected that the shutter 5 has been opened. can.

FIG. 3 shows another conventional example. In Figure 3, 7
Reference numeral 8 indicates a microswitch provided in the recording/reproducing apparatus, and 8 indicates a rotating arm of the microswitch 70. A roller 9 is rotatably supported at the tip of the rotating arm 8. 10 is a driving piece of the microswitch 7.

In FIG. 3, when the disc cartridge is inserted into the recording/reproducing apparatus and set at a predetermined position, the shutter 5 is opened by a shutter opening/closing mechanism (not shown), and during the opening, the shutter 5 drives the roller 9. The opening of the shutter 5 is detected by rotating the rotating arm 8, driving the drive piece 10, and turning the microswitch 7 on or off.

Problems to be Solved by the Invention However, in the conventional example shown in FIG. 2, the light emitting element 6 and the light receiving element 6' must be arranged in the thickness direction of the cartridge in order to block the optical path with the shutter 5. , there is a drawback that the thickness of the recording/reproducing device is too thick, and in the conventional example shown in Fig. 3, mechanical contacts inside a microswitch are turned on and off, so the reliability of the contacts is insufficient. There were drawbacks.

The present invention solves the above-mentioned conventional problems, and provides a thin and highly reliable means for solving many problems by detecting the opening and closing of the shutter. , a lever that is directly driven and rotated by the shutter, a light shielding plate provided on the lever, and a photointerrupter whose optical path is blocked by the light shielding plate.

According to the present invention, when the shutter is opened, the lever is rotated by the shutter, and the light shielding plate provided on the lever blocks light from the optical path of the photointerrupter, so that opening of the shutter can be detected.

Embodiment FIG. 1 shows an embodiment of the present invention. In FIG. 1, reference numeral 11 denotes a lever rotatably supported by a shaft 12, and a roller 13 is rotatably supported at the tip of this lever 11. 14 is a light shielding plate integrally formed on the side of the lever 11, and 15 is a spring that biases the lever 11 in one direction. Reference numeral 16 denotes a U-shaped photointerrupter, in which a light emitting element and a light receiving element are disposed facing each other above and below a recessed portion.

FIG. 1 shows a state in which the disc cartridge has been transported to a predetermined position within the recording/reproducing apparatus.

In this state, since the roller 13 at the tip of the lever 11 is located at the stepped portion 4 on one side of the case 1, the lever 11 is rotated clockwise by the biasing force of the spring 15. Therefore, the light shielding plate 14 formed integrally with the lever 11 does not shield the light passing through the recessed portion of the photointerrupter 16.

When the shutter 5 is slid in the direction of arrow Y by a shutter opening/closing mechanism (not shown) from the state shown in FIG.
will be opened. / While the Yanota 5 is sliding in the direction of the arrow Y, the shutter 5 drives the roller 13 and the lever 1
Rotate 1 counterclockwise. Therefore, the light shielding plate 14 formed integrally with the lever 11 also rotates counterclockwise together with the lever 11, thereby shielding the light passing through the recessed portion of the photointerrupter 16. In this way, opening and closing of the shutter 5 can be detected depending on whether or not the light passing through the recessed portion of the photointerrupter 16 is blocked.

When the shutter 5 slides and the long hole 2 is opened, the disc inside the case 1 is clamped by the turntable and clamp member that entered the case 1 through the long hole 2.
Rotationally driven. Further, the head enters the case through the elongated hole 2 to perform recording or reproduction.

In this way, since no mechanical contacts are used in this embodiment,
It is highly reliable, and lever 1 is activated when shutter 5 is opened or closed.
Since the shutter opening/closing detection mechanism is structured to rotate and block light, the shutter opening/closing detection mechanism can be made thinner, and the recording/reproducing apparatus can be made thinner.

In the above embodiment, light is blocked by a light shielding plate in the optical path of the photointerrupter when the shutter is opened, but light may be shielded by a light shielding plate in the optical path of the photointerrupter when the shutter is closed.

Effect of the invention According to the present invention, the following effects can be obtained.

1. High reliability as no mechanical contacts are used.

2 It has a structure in which a lever is rotated according to the opening and closing of the shutter, and the light path is blocked by a light shielding plate provided on this lever,
It is possible to make it thinner.

[Brief explanation of drawings]

FIG. 1 shows the disk force in one embodiment of the present invention. 1...Case, 2...Long hole, 3...Slide-1
4...Step part, 5...Shutter, 11...Lever,
12... Axis, 13... Roller, 14... Light shielding plate, 15... Spring, 16... Photo interrupter.

Claims (1)

[Claims] A disk cartridge shutter opening/closing device consisting of a lever that is driven and rotated by the shutter in response to opening and closing of the disk cartridge shutter, a light shielding plate provided on the lever, and a photointerrupter whose optical path is blocked by the light shielding plate. Detection device.