JPS60115058A - Magnetic recorder - Google Patents

Abstract

PURPOSE:To close automatically a slit of a front panel when a disk cassette is loaded by providing slidably a front shutter to the inner surface of the front panel and securing an interlocking action between the front shutter and a cassette holder. CONSTITUTION:In an action mode a disk cassette 4 is put into a cassette holder 48 through a slit 49 of a front panel 25 to push a cassette holder 48 toward a carrier motor 3. Then the cassette 4 is dropped toward a disk drive shaft 10 at the side of a base 1 from an extended surface of the slit 49 together with the holder 48. Then a front shutter 61 moves down together with the holder 48 in response to the movement of the holder 48. Thus the slit 49 is closed automatically. In such a way, a short-circuit fault caused by such a factor where a driver, etc. has a contact with a PC plate regardless of intention or accident is prevented previously.

Description

[Detailed description of the invention] Technical field of invention The present invention relates to a magnetic recording device.

Technical background of the invention and its problems Recently, disk cassettes in which magnetic disks are housed in hard cases have been used. As a magnetic recording device using this disk cassette, the disk cassette is inserted into the internal cassette holder through the slit in the front panel.
Slide the cassette holder along with the disc cassette horizontally toward the back, then drop the cassette holder in a direction perpendicular to the sliding direction and clamp it.
There is a disk cassette that is connected to a central metal disk drive shaft to rotate a magnetic disk, and a movable body holding a magnetic head is moved in the radial direction of the magnetic disk to read or write data. However, when the disk cassette is not installed, the cassette holder faces the slit in the front panel, but when the disk cassette is installed, the cassette holder falls toward the disk drive shaft, so that the internal space expands in the direction in which the slit extends. For this reason, whether intentionally or negligently, a screwdriver or the like may be inserted through the slit and touch a conductive part of the PC board, causing a malfunction. - There is a demand for a casslit opening/closing mechanism that does not impair the operability of inserting and removing disk cassettes.

OBJECT OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide a magnetic recording device that can automatically close a slit in a front panel when a disk cassette is attached.

A cassette holder with a front opening is provided facing a slit in a front panel, a disc cassette is inserted into the cassette holder through the slit, and the cassette holder is inserted together with the disc cassette in a direction perpendicular to the extension surface of the slit. In the device that is clamped by dropping the front panel, a front shutter is slidably provided on the inner surface of the front panel, and this front shutter is linked to the operation of the cassette holder. The slit is automatically closed when the PC board is installed, thereby preventing short-circuit accidents of the PC board, regardless of intent or negligence.

Examples of the invention An embodiment of the present invention will be described based on the drawings.

(1) is a die-cast base, and on the top of this base (1) there is a carrier block (2) and a carrier motor (3).
) is iffed. Although the carrier block (2) is not shown, it holds the magnetic head and drives the carrier motor (3).
The magnetic head has a carrier that moves linearly by the rotational force of the magnetic head, and a head load arm for the magnetic head. Further, on the upper surface of the base (1), there are provided pillars (5) (61) that support the four corners of the lower surface of the disc cassette (4), and a conical protrusion (7) is formed at the upper end of the rear pillar (5). A motor (8) is attached to the center of the base (1), and a circular table (9) is attached to the motor (8).
A disk drive shaft (1G) is connected thereto, and a pin α° C. is erected on the outer periphery of this table (9) (see FIGS. 5 and 6).

As shown in FIGS. 7 and 8, the disk cassette (4) has a magnetic disk α3 fixed at the center with a ring q2 supported by a table (9), housed in a flat node case a. , a hole α9 is formed in the ring (2) to engage with the pin αD. Furthermore, a positioning hole (te) for positioning the conical protrusion (7) and a write-inhibiting claw α that can be folded are formed on the back surface of the hard case (a), and a front edge of the hard case (4) is formed. A slope is formed at the corner where 0 seconds and the right side edge α intersect.Furthermore,
Does the hard case U4 have a disk shutter? ■ is the right edge α
It is attached so that it can slide freely while being biased towards the 9 side. This disk shutter Q+) has a window (c) that faces the window formed in the hard case a4J when it slides to the left. Furthermore, hard case (14)
A notch (C) is formed on the leading edge α.

Next, on the upper surface of the base (1), a front panel (C) is attached to the front opening surface, and a frame made of a metal plate having a pair of left and right side plates (A) is screwed. Two horizontal guide grooves (c) and two downwardly bent locking grooves Q9j are continuously formed on the side plate (a). In addition, three guide pins (A) are set up at the bottom of the frame ■, and on the right side of the bottom, a lock play 1/02 with a claw G illusion at the tip tilts forward and backward around pin 0'3. This pin 02 holds a spring @ that raises the lock plate 02 forward. Furthermore, a bushing plate (C) is slidably attached to the bottom left side of the frame QA and is biased forward by a spring.

As shown in FIG. 4, the bushing plate 0→ has a wide portion Q and a narrow portion projecting upward. Furthermore, the frame (A) has a notch 01 that holds the PC board (2).
and a mounting piece Oυ are formed.

Next, on the bottom of the frame, a clamp release body (T) having a button (6) protruding from the front panel is biased forward by a spring (2) and can be slid freely by the guide pin (1). is maintained. This clamp release body (G) is made of sheet metal, and has a notch (G) formed on its right side that engages with the claw G force of the lock plate 02, and a notch (G) that engages with the claw G force of the lock plate 02, and a bottom of the guide groove (C) on both sides. A push-up edge 0 is formed that slopes downward from the upper edge IQ at the same level.

A cassette holder (9) for slidably holding the disk cassette (4) is provided at the top of the lamp release body 04. This cassette holder ΩO has an open front face and faces the ring Ill→ formed in the front channel (c), and the bottom face is wide open.
Two protrusions made of pins supported by the guide grooves (c) are attached to each side.

This cassette holder (b) is biased toward the front panel) and the base (1) by a spring.

Moreover, plate flaps are attached to both sides of this cassette holder decoy to press the disk cassette (4) into contact with the bottom of the cassette holder. Furthermore, the cassette holder Ω→ has a receiving piece that comes into contact with the rear edge of the disk cassette (4), a receiving piece that comes into contact with the slope (a) of the disk cassette (4), and the bushing plate ( to) wide part 0'/
) and the notch corresponding to the narrow part (b).
is formed. Further, a lever 6η is attached to the cassette holder 0→ so as to be able to freely rotate around a support shaft or a duck by being biased by a spring branch, and the tip of this lever 6′ is attached to the notch ( The pin ■ that engages with c) is fixed.

Furthermore, guides (2) for vertically movably holding the front shutter υ facing the slit (A) are integrally molded on both sides of the inner surface of the front panel (A).

This 70-point shutter ID is integrally formed with a protrusion that is slidably inserted under a bar fixed to the upper surface of the cassette holder (c). Then, a small window ■ is formed on the front panel), and the window opposite to this window, which is the display section, is the front shutter Q3])
is formed. Furthermore, although the front panel () is made of black synthetic resin, the front shutter Oυ is set to a color other than black, for example, red.

In such a configuration, the clamp release body (G) is prevented from moving forward because its notch (C) is engaged with the pawl G]) of the lock plate 02. This state is as shown in FIGS. 1, 2, and 5.

When in use, insert the disc cassette (4) on the front panel (
Insert it into the cassette holder α→ from the slit O field in c) and push it toward the cassette holder Qet-carrier motor (3) side.

As a result, the protrusion (7) of the cassette holder (G) reaches from the guide groove (C) to the locking groove (C), but is supported by the upper edge QQ rising from both sides of the clamp release body.
) will not fall to the side. The pin member of the lever Q is pushed by the front α machine of the disk cassette (4), so it rotates against the force of the spring, and the bushing plate (c) is also pushed by the leading edge α→, causing the carrier motor ( 3) Slide to the side. If you push in the cassette holder O→, the disc cassette (
The front edge of 4) (Pushed by JF!I, the lock plate 02 relaxes the spring (B) and tilts backward, and the claw 0] as shown in Fig. 6) releases the clamp release body □□□ . As a result, as shown in FIG. 3, the clamp release body 03 slides toward the front panel (C) by the force of the spring, and the upper body (C) retreats toward the front panel (C).

Therefore, there are 4 nice hooks (in the cassette holder).
4) and is pulled toward the pace (1) by the force of the spring ψυ, and the protrusion falls into the locking groove. The disk cassette (4) receives the pressure of the leaf spring Φ and moves to the column (5) (
6), and the positioning hole αQ and the conical projection (7
), and the plate (6) of the magnetic disk α9 is connected to the disk drive shaft (1 (m). Also, the switch plate (1) attached to the base (1) is set in the correct position. c), thereby,
The mounting state of the disk cassette can be extracted as an electrical signal.

In addition, the lever 67) is rotated because the bin is pushed by the disc cassette (4), but the bin is pushing the front edge of the disc cassette (4) (IE9' (disk shutter Q in the process of sliding)). Forcibly slide it to the left, and when the window (C) in the center of the disk shutter Q and the window space formed in the Node case (B) match, the bottle... will fit into the notch (C) in the Node case Q4. Therefore, even if the pushing hand is released from the disc cassette (4), the lever 6'I) will not return due to the force of the spring (g), and the disc cassette (4) will remain attached. Due to the force of spring 06.

The Tush plate OQ pushes the protrusion of the cassette holder (B) with its wide portion 0, but the protrusion engages with the locking groove (C), so the cassette holder 00 does not move.

To remove the disk cassette (4), press the button Ω and push the clamp release body (6) toward the carrier motor (3). Push the protrusion (7) into the guide groove μs using the push-up edges u'i on both sides.
push it up to the level of Therefore, the cassette holder Qe returns to the front tunnel (E) side until the protrusion - goes to the back of the guide groove (C), and the lock plate 0 is released.
The force of the second spring (b) returns to the front and the third pawl locks the clamp release body (43).Until now, the bottle ■ of the Reno (-E71) and the notch Q of the disc cassette (4) are still engaged. However, when the cassette holder IEI floats above the base (1), the protrusion reaches the top of the wide part 0 of the bushing plate (c), so the narrow part (to) enters between the notches and the disc Push the cassette (4) towards the rough front (flannel) side. As a result, the pin ring of the V bar 6 will come off from the notch (c) of the disc cassette (4), and the reno (
4) is pushed out from the cassette holder Ω→ to the sleeve 1m and rotated υ by the force of the spring arm.

And, while in use, the cassette holder ←→ has a slit (to)
falls to the pace (1) side from the extended surface of the PC board 09, but the front shutter (0υ) closes the slit (6) in conjunction with the downward movement of the cassette holder @→. It is possible to prevent short-circuit accidents caused by inserting a screwdriver etc. from t41 and touching the PCCa2O conductive part regardless of whether it is exited or not. Since the front shutter (6υ) also operates automatically, the operability of inserting and removing the disk cassette (4) is not impaired.

In addition, in the usage condition shown in Fig. 6, the front shutter (6〃 closes the slit θ field, but the front shutter O seen from the slit (6)) has a different hue on the front panel (c), so the front shutter It can be clearly seen that In has descended together with the cassette holder (g) and the disc cassette (4) is connected to the disc drive shaft <10. In the state shown in Figure 5, the front panel O
Although the window ρ and the window ring of the front shutter (6) do not match, in the state shown in FIG.
You can know the connection status with O. Or the 10th
As shown in the figure, a color-coded display part -1 is formed on the outer surface of the front shutter O◇, and one of the display parts flashes on the front shutter (Oυ position) which is linked to the cassette holder →. The same purpose can be achieved by arranging them to face each other.

Effects of the Invention Since the present invention is configured as described above, when the disk cassette inserted into the cassette holder through the slit in the front panel is dropped together with the cassette holder from the extended surface of the slit onto the disk drive shaft side, the movement of the cassette holder is prevented. The system slit can be automatically closed by the interlocking front shutter, which can prevent short circuit accidents caused by a screwdriver, etc. touching the PC board, whether intentionally or negligently. Further, by automatically operating the front shutter, the operability of inserting and removing the disk cassette is not impaired.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a plan view, FIGS. 2 and 3 are side views showing the movement of the cassette holder, FIG. 4 is an exploded perspective view, and FIGS. FIG. 6 is a longitudinal side view showing the movement of the cassette holder along line A-A in FIG. 1, FIG. 7 is a perspective view of the disk cassette,
Figure 8 is a perspective view of the disk cassette from the back side, Figure 9
This figure is an exploded perspective view showing the state in which the front shutter is attached, and FIG. 10 is a perspective view showing a modification of the display section of the front shutter. 4... Tisfu cassette 1.10... Tisfu drive shaft, 13... Magnetic disk, 14... Hard case, 25... Front panel, 27... Frame, 2
8...guy)" groove, 29...locking groove, 39...P
C plate, 43... Clamp release body, 48... Cassette holder, 49... Slit, 50... Protrusion, 61...
...Front shutter, 65...Window, 66...Window (
Display section), "L69...Display section Applicant: Tokyo Electric Co., Ltd.

Claims (1)

[Claims] 1. A front panel in which a slit for inserting and removing a disk cassette containing a magnetic disk stored in a node case is attached to the frame, and a flat cassette holder for holding the disc cassette so that it can be freely inserted and removed is attached to the frame. A PC board parallel to the cassette holder and a disk drive shaft having an axis perpendicular to the cassette holder are disposed along the extended surface of the slit, with the cassette holder in between, and the cassette holder A plurality of protrusions are provided on both sides of the frame, a plurality of guide grooves are provided on both sides of the frame to slidably hold the protrusions along the extended surface of the slit, and the protrusions are connected to the disc drive shaft from these guide grooves. A plurality of locking grooves are formed in the frame, and the cassette holder is urged toward the front panel side and the disk #jA moving shaft side, and the cassette holder is inserted into the frame from the locking grooves. A clamp release body to be released is slidably attached, and a front shutter that closes the slit in conjunction with movement of the cassette holder in the direction of the disk drive shaft is slidably attached to the inner surface of the front panel. magnetic recording device. 2. The magnetic recording device according to claim 1, wherein the hue of the front shutter is different from the hue of the front shutter. 3. The magnetic recording device according to claim 1, wherein a window is opened in the front panel, and a display section facing the window is formed in the front shutter.