JP2666797B2 - Disk unit - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device for writing / reading information to / from a recording medium housed in a disk cartridge or the like, and more particularly to a disk device for determining whether or not a recording medium is mounted. The present invention relates to a detection structure for detecting a mode. 2. Description of the Related Art Opening and closing states of a mode hole indicating a mode of a disk cartridge of a magnetic recording / reproducing apparatus (disk apparatus) for mounting and removing a conventional disk cartridge by moving the disk cartridge up and down are shown in FIGS. It was detected by the structure shown in FIG. FIGS. 7 and 8 are diagrams for explaining a conventional disk cartridge detecting structure, which are a first structural diagram and a second structural diagram, respectively. FIGS. 9 and 10 are views for explaining another conventional disk cartridge detecting structure, and are a 1 'structural diagram and a 2' structural diagram, respectively. In FIG. 7 and FIG. 8, the disk cartridge 11 has a mode detection hole 11a, and has a moving piece 12 as a means for opening and closing the mode detection hole. The light emitting elements 1 are provided on both sides of the disc cartridge 11.
3, the light receiving element 14 is disposed, and the mode detection hole 11
7A, the light receiving element 14 detects light reception as shown in FIG. 7, and when the mode detection hole 11a is
As shown in FIG. 8, the light receiving element 14 has a structure that cannot detect light. On the other hand, in FIGS. 9 and 10, the disk cartridge 11, the mode detecting hole 11a, and the moving piece 12 are the same as those in FIGS. 7 and 8, and have been moved in the direction A in the figures. The slider 22 guided by the pole 23 erected on the frame 21 is slidable, and is urged by the spring 24 to the position shown in FIG. And the slider 22
The light-emitting element 26 and the light-receiving element 25 are provided with one piece interposed therebetween, and even if the disk cartridge 11 penetrating the mode detection hole 11a moves in the direction A in FIG.
9 does not move by infiltrating into the mode detection hole 11a.
The light receiving element 25 does not detect light reception as shown in FIG.
a is the moving piece 12, and the disc cartridge 11
When the slider moves in the direction A in the figure, the slider 22 is pushed as shown in FIG. 10, and the light receiving element 25 detects light. Further, a switch for detecting whether or not the disk cartridge is mounted on the disk device is provided at a completely different place from a switch for detecting the mode of the disk. [0008] However, in the above-mentioned prior art, since the light emitting element is always lit, the power consumption is large. It is expensive because a control circuit for photoelectrically converting the light input of the light receiving element and amplifying the electric signal is required. 9 and 10 have a problem that a mechanical mechanism is required and the structure is complicated. Another problem is that the size and thickness cannot be reduced and the presence or absence of a recording medium cannot be reliably detected. SUMMARY OF THE INVENTION It is an object of the present invention to provide a disk drive which can realize inexpensiveness, downsizing and thinning, and which can reliably detect the presence or absence of a recording medium. A disk device according to the present invention is a disk device on which a recording medium capable of changing the open / close state of a mode detection hole by moving a moving piece is mounted. A mode detection hole opening / closing detection switch for detecting the open / closed state of the recording medium, and a recording medium detection switch for detecting that the recording medium is mounted, wherein the mode detection hole opening / closing detection switch and the recording medium detection switch are ,
The recording medium detection switch is disposed adjacent to the position outside the moving area of the moving piece that changes the open / close state of the mode detection hole, and the mode detection hole opening / closing detection switch and the recording medium detection switch are Is characterized by being configured as one detection switch unit. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIGS. 1 and 2 are views showing an embodiment of the present invention, and FIGS. 3, 4, 5, and 6 are views for explaining main parts thereof. FIG. 3 shows an irregular cross section for convenience of explanation. In FIG. 1 and FIG.
The disk cartridge 11 having a has a moving piece 12 for opening and closing the mode detection hole 11a.
The ascending / descending unit moves up and down in accordance with means (not shown) for ascending and descending in the direction of the arrow in the figure. The common terminal 3 and the first and second dedicated terminals 4 and 4a constituting a dedicated circuit are substantially parallel to the disk cartridge and are arranged in substantially the same plane direction. It is implanted in a single housing or body 6 consisting of the components shown in FIG. First terminal 4, common terminal 3, second terminal 4a
The first plunger 1 and the second plunger 1a disposed between the first and second common terminals 3 are slidable actuators guided by the main body 6, and are used to provide conduction between the respective terminals. The first plunger 1 and the second plunger 2a shown in FIG.
When the plunger is pressed in the direction of the arrow and the plunger is pushed in the direction of the arrow, the contact piece is separated from the terminal and the conduction relation is released. Retainer 7
Is responsible for the role of the spring receiver 8 and the cover.
The portion of the common terminal 3, the first terminal 4, and the second terminal 4a formed outside the main body 6 has a shape similar to the first terminal 4 shown in a portion not shown in cross section in the substantially left half of FIG. Each is mounted on the board 5 by soldering. FIG. 3 is an irregular drawing for explaining the internal structure. The schematic shape of the main part in this embodiment is as shown in the switch perspective view of FIG. And
The function of the relation between each terminal and the contact piece described above with reference to FIGS. 1, 2 and 3 is always ON and OFF by operation as shown in the contact structure diagram of FIG. FIG. 1 shows an example of a multiple switch having the above structure.
When the disc cartridge 11 with the mode detection hole 11a penetrated therethrough is lowered to the position shown in FIG. 1, the second plunger 1a is pushed by the disc cartridge 11 to break the electrical connection between the common terminal and the second terminal. The first plunger 1 does not operate because it infiltrates the mode detection hole 11a, and the electrical connection between the common terminal 3 and the first terminal 4 is maintained. On the other hand, as shown in FIG. 2, when the disc cartridge 11 in which the mode detection hole 11a is in the non-conductive state by the moving piece 12 is lowered to the position shown in FIG.
a is also pressed to break the conduction relationship between the common terminal 3 and the first terminal 4 and between the common terminal 3 and the second terminal 4a. As described above, in the present invention, the presence or absence of the disk cartridge 11 and the mode set for the disk cartridge are detected by one detector. In the embodiment of the present invention, the first plunger 1 and the second plunger 1a are slidable actuators. However, it is needless to say that the first plunger 1 and the second plunger 1a may be constituted by slidable arms or the like (not shown). ), And the springs 8 can be provided between the terminals if they have a light pressure sufficient to bias the first plunger 1 and the second plunger 1a. Although the present embodiment has been described as a double-type switch, the present structure can be applied to two or more switches, and can detect a plurality of types of modes. As described above, in the disk device of the present invention, the mode detection hole opening / closing detection switch and the recording medium detection switch are unitized and arranged adjacent to each other. This has the effect of facilitating assembly. Furthermore, since the recording medium detection switch is disposed at a position outside the moving area of the moving piece that changes the open / close state of the mode detection hole, the recording medium can be stored regardless of whether the moving piece closes the mode detection hole or not. This has the effect that the detection switch can reliably detect the mounting of the recording medium.

[Brief description of the drawings] FIG. 1 is an operation structure diagram showing an embodiment of the present invention. FIG. 2 is an operation structure diagram showing an embodiment of the present invention. FIG. 3 is a cross-sectional structural view of the switch of the present invention. FIG. 4 is a plan view of a switch according to the present invention. FIG. 5 is a perspective view of a switch according to the present invention. FIG. 6 is a switch contact circuit diagram of the present invention. FIG. 7 is a diagram showing a conventional example. FIG. 8 is a diagram showing a conventional example. FIG. 9 is a diagram showing another conventional example. FIG. 10 is a diagram showing another conventional example. [Explanation of symbols] 1 First plunger 1a Second plunger 3 Common terminal 5 Substrate 6 Body 11 disk cartridge 11a Mode detection hole 12 Moving piece

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Satoshi Yoda               2-5-11 Kogishi-dori, Suwa-shi, Nagano               Sanritsu Industrial Co., Ltd.                (56) References JP-A-61-965 (JP, A)                 Actually open, Showa 53-52121 (JP, U)                 Actual opening 1983-52670 (JP, U)

Claims (1)

(57) [Claims] Changing the open / close state of the mode detection hole by moving the moving piece
A disk device on which a possible recording medium is mounted, comprising: a mode detection hole opening / closing detection switch that detects an open / closed state of the mode detection hole; and a recording medium detection switch that detects that the recording medium is mounted. has the mode detection hole close detection switch and the recording medium detection switch is placed adjacent to, the recording medium at a position away from the moving area of the moving pieces to change the open or closed state of the mode detection hole Detection switch
The mode detection hole opening / closing detection switch and the recording medium detection
The switch is configured as one detection switch unit
A disk device characterized by being performed .