JPS61237263A - Disk device - Google Patents

Abstract

PURPOSE:To decide the surface or rear surface of a cartridge by providing a first and a second switches detecting a first and a second rotary arms which open a shutter, rotating by a predetermined angle when a case in which an information recording medium is inserted. CONSTITUTION:A disk 4 is accommodated in a case 1 of a disk cartridge and a center member 5 is exposed from an opening 2 of the case 1. A shutter 6 is slidably supported by a side of the case 1 and a long hole 3 of the case 1 is usually closed by the shutter 6. Rotary arms 9, 8 rotatably supported by the rear section of a cartridge receiving member 8 and rollers 11, 12 are rotatably supported by one end of the arms 9, 10. Switch driving pieces 13, 14 are integrally formed by the arms 10, 9 and energized by springs 15, 16. Switches 17, 18 are attached to the member 8 and driven by the driving pieces 13, 14 when the arms 9, 10 rotates with respect to arrows B, C. By the condition of opening and closing of the switches 17, 18, the surface and the rear surface of the disk cartridge can be judged.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cartridge for accommodating an information recording medium such as an optical disk or a magnetic disk, and particularly to a disk device using a cartridge having a shutter.

2. Description of the Related Art In a disk device using this type of cartridge, it is necessary to determine which side of the cartridge inserted into the device is recordable or readable.

In conventional devices of this type, light transmission holes or cutouts are formed in the cartridge, or silver paper or the like that reflects light is pasted onto the cartridge, and the presence or absence of light transmission or reflection is detected, and the surface of the cartridge is detected.・I was judging the back.

Problems to be Solved by the Invention However, in the conventional disk device described above, it is necessary to form a light transmission hole or cutout in the cartridge, or to attach silver paper or the like to the cartridge to reflect light. This method has the disadvantage of requiring an expensive photoelectric element to detect the transmission and reflection of light.

The present invention solves these conventional problems,
It is an object of the present invention to provide a disk device capable of determining the front and back sides of a cartridge with a simple configuration.

Means for Solving the Problems In order to solve the above problems, the present invention provides a switch that operates when the first and second rotating arms for opening and closing the shutter of the disk cartridge rotate by a predetermined angle. In addition, the switch is provided with a determining means for determining whether the switch is front or reverse based on the open/closed state of the switch.

Function The present invention has the above-mentioned configuration, and when the disc cartridge is inserted, the shutter of the disc cartridge is opened by the rotary arm. At this time, one switch is closed depending on the orientation of the disk cartridge. The open/closed state of this switch is input to the determining means, and it is determined whether the disk cartridge is front or back.

EXAMPLE An example of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a case of a disk cartridge, and a hole 2 is formed in the center of the upper and lower plates of the case 1. Reference numeral 3 designates long holes for the head formed in the upper and lower plates of the case 1. As shown in FIGS. 2 and 3, a disk 4 such as an optical disk or a magnetic disk is housed in the case 1. As shown in FIGS. Reference numeral 5 denotes a central member attached to the center of the disk 4, and this central member 5 is exposed through the hole 2 of the case 1. A shutter 6 is slidably supported on one side of the case 1, and the shutter 6 is biased in one direction by a spring or the like. The elongated hole 3 of the case 1 is normally closed by a shutter 6, and a finger or the like can directly touch the disc 4.
This prevents dust from touching the disc 4 and also prevents dust from adhering to the disc 4. 7 is a window formed in the shutter 6.

Reference numeral 8 designates a cartridge holder that guides the disk cartridge inserted through the cartridge insertion hole of the disk device and also holds the disk cartridge. 9,
The cartridge receiver 1O is a first and second rotating arm that is rotatably supported at the rear of the member 8, and a roller 11S12 is rotatably supported at one end of the rotary arm 9 and 10. .

13.14 is a switch driving piece integrally formed with the rotating arm 9.10, and 15.16 is a spring that biases the rotating arm 9.10 in one direction. 9.10 is pushed in the direction of arrows B and C.

Reference numeral 17.18 is a switch attached to the cartridge receiver member 8, and this switch 17.18 is attached to the rotating arm 9.
, IO rotate in the opposite direction to the arrows B and C, the switch drive pieces 13 and 14 of the rotation arm 9 and IO are driven to close the switch.

In FIG. 1, the disk cartridge is inserted into the cartridge holder 8 (and the roller 1 of the rotating arm 9).
1 abuts against the side of the shutter 6.

As the disk cartridge is further inserted in the direction of arrow A, the rotating arm 9 is rotated against the biasing force of the spring 15. When the rotating arm 9 is rotated in the opposite direction to the arrow B, the shutter 6 is moved by the roller 11 of the rotating arm 9 in the direction indicated by the arrow D.
The shutter 6 is opened as shown in FIG. As shown in FIG. 2, when the disk cartridge is inserted into the disk drive with the surface (side A) facing upward and the shutter 6 is opened, the switch 18 is opened (ON).
However, the switch 17 is in an open (OFF) state.

On the other hand, as shown in FIG. 3, when the disk cartridge is inserted into the disk drive with the back side (side B) facing upward, the shutter 6 is driven by the roller 12 of the rotating arm IO, and the shutter 6 is opened. do. In this case, switch 17 is closed (ON), but switch 18 is open (OF).
F) state.

As described above, in this embodiment, the switch 17.18 is opened and closed by using the rotational movement of the rotation arm 9.10 for opening and closing the shutter 6 of the disc cartridge, and the disc cartridge is opened and closed from the open/closed state of this switch. The front and back sides of the image are determined.

The ON and OFF signals of the switches 17 and 18 (7) are input to a determination circuit comprising, for example, a central processing unit (CPU), and determine whether the disk cartridge is front or back.

FIG. 4 shows the flow of head/tail determination in the above determination circuit. In FIG. 4, it is determined in the first step 20 whether or not the switch 17 is closed (ON), and if it is determined that the switch 17 is closed (ON), the B side is ready for recording or reading. Therefore, in the fourth step 23, recording or reading processing of the B side is performed. When it is determined in the first step 20 that the switch 17 is open (OFF), the process proceeds to a second step 21, in which it is determined whether the switch 1B is closed. If it is determined in the second step 21 that the switch 18 is closed, it means that the A side is ready for recording or reading, and in the third step 22 the A side is closed.
Processing for recording or reading the surface is performed. Note that if it is determined in the second step 21 that the switch 18 is not closed (ON), the process returns to the first step 20.

Effects of the Invention According to the present invention, it is possible to determine the front and back sides of a disc cartridge with a simple configuration without having to modify the disc cartridge to determine the front and back sides (and by using a rotating arm for opening and closing the shutter). It has the advantage of being able to perform

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the main parts of a disk device according to an embodiment of the present invention, FIGS. 2 and 3 are explanatory diagrams of the operation of the device,
FIG. 4 is a diagram showing the flow of front/back determination of the same apparatus. 1... Case, 2... Hole, 3...
...Elongated hole, 4...Disc, 5...Central member, 6...Shutter, 7...Window,
8... Cartridge holder is a member, 9, lO...
... Rotating arm, 1112 ... Roller, 13
, I4... Switch drive piece, 15.16...
...Spring, 17.18...Switch. Name of agent: Patent attorney Toshio Nakao and one other person Figure 2 Figure 4

Claims (1)

[Claims] An information recording medium is rotatably housed in a case, and a disk cartridge has a shutter that opens and closes a long hole formed in the case, and a first disc cartridge that rotates when the case is inserted to open the shutter. , a second rotating arm, and first and second switches that operate when each of the first and second rotating arms rotates by a predetermined angle or more;
A disk device comprising determining means for determining whether the disk cartridge is a front side or a back side based on the operating states of the first and second switches.