JPS60115061A - Magnetic recorder - Google Patents

Abstract

PURPOSE:To attain smoothly loading and unloading actions for a disk cassette by using single lever to open a disk shutter and discharge a disk cassette, and fitting smoothly the disk cassette to a projection in a clamp mode. CONSTITUTION:A lever 57 attached to a cassette holder 48 is actuated in response to a process where a disk cassette 4 is put into the holder 48 through a slit of a front panel 25. Thus a disk shutter is opened to set a part of a disk against a magnetic head. The tip of the lever 57 is held by a hook recess 24 formed at the front edge of the cassette 4 to be positioned accurately at a clamp position. When the holder 48 is floated from a disk drive shaft, the cassette 4 is pushed in the discharge direction. Then the contact part of the lever 57 is removed from the recess 24. In such a way, the cassette 4 is discharged by the resetting force of the lever 57.

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 Conventionally, a disk cassette has been developed, in which a magnetic disk is housed in a node case, and a disk shutter is slidably attached to the front edge of the node case by biasing it to one side. When a disk cassette is installed in a flat cassette holder, the disk shutter is opened so that a part of the magnetic disk faces the magnetic head, and the cassette holder is dropped in a direction perpendicular to the direction of insertion and removal of the disk cassette and clamped. There is a device in which the rotation of the disk drive shaft is transmitted to the magnetic disk of the disk cassette at this clamp position to perform data processing. During clamping, in order to accurately specify a track, it is necessary not only to clamp the cassette holder, but also to position the disc cassette by fitting a protrusion into a positioning hole formed at the bottom of the disc cassette. On the other hand, when unclamping the cassette holder, the cassette holder is lifted off the disk drive shaft and the disk cassette pops out from the cassette holder, but if the ejecting force that causes it to pop out is acting on the disk cassette during clamping, the positioning hole and protrusion The alignment does not go smoothly. Therefore, when clamping at the right time, there is a tendency to request that the disc cassette pop out when the clamp is released without applying an external force in the ejection direction to the disc cassette, so it is necessary to simplify the structure.

OBJECTS 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 which allows smooth loading and unloading of disk cassettes and which has a simplified structure.

SUMMARY OF THE INVENTION In the process of inserting a disk cassette into a cassette holder through a slit in a front panel, a lever attached to the cassette holder is interlocked to open a disk shutter of the disk cassette and a part of the magnetic disk is attached to a magnetic head. In addition, the disk cassette to be inserted activates the actuating body, switches the disk installation detection switch, transmits the installation state of the disk cassette to the control unit as an electric signal, and then moves the cassette holder along with the disk cassette to the disk drive shaft side. In this clamp position, the tip of the lever that opens the disk shutter is held by the locking recess formed on the front edge of the disk cassette to prevent ejection force from acting on the disk cassette from the lever, and in the same way. At the clamp position, the pressing part of the cassette holder separates the υ operating body from the disc cassette so that no ejection force is applied from the operating body to the disc cassette.
Therefore, when clamping, the disk cassette fits smoothly into the protrusion and is accurately positioned, and when the disk cassette is lifted from the disk drive shaft by the clamp release body, the disk cassette is ejected by the return force of the operating body. The abutment part of the lever is released from the locking recess of the disc cassette by pushing it out in the direction, and the restoring force of the lever causes the disc cassette to pop out, making it possible to smoothly insert and remove the disc cassette. The opening of the shutter and the ejection of the disc cassette are performed at the right timing, and a single operating body switches the disc mounting detection switch and releases the lever from the locking recess of the disc cassette, thus simplifying the structure. It is structured so that it can be easily visualized.

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

(1) is a die-cast base, and the top surface of this base (1) has a carrier block (2) and a carrier motor (3).
) is provided. Although not shown, the carrier block (2) has a carrier that holds a magnetic head and moves linearly by the rotational force of a carrier motor (3), and a head load arm that faces the magnetic head. In addition, on the top surface of the base (1) there are pillars (5) (6) 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 pillar (5) on the back side. has been done. 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 (11) having a
(See Figure 6).

The disk cassette (4), as shown in FIGS. 7 and 8, is a magnetic disk 0z supported by a table (9) and fixed at the center, and a magnetic disk 0z is housed in a flat hard case side. (A hole 09 that engages with the pin 0υ is formed in 121. Also, on the back of the hard case I, there is a positioning hole (16) that is positioned on the conical protrusion (7) and a foldable A sloping protrusion is formed at the corner where the leading edge of the hard case (11) and the right side edge (11) are formed. The shutter υ is attached so that it can slide freely while being biased toward the right edge α value side. When this disc shutter (2υ) slides to the left, the window (opposed to the window (2) It has a window (c).It also has a hard case (c).
A locking recess (to) is formed in the front edge 0 barrel of 14).

Next, on the upper surface of the base (1), a front panel (C) is attached to the front opening surface, and a frame (27) made of a metal plate having a pair of left and right side plates (C) is screwed. There is a horizontal guide groove (support) on the side plate (c).
and two downwardly bent locking grooves are formed in a continuous manner. In addition, three guide bins (to) are set up at the bottom of the frame (2 wa), and a claw (to) is attached to the tip on the right side of the bottom.
A lock plate (34) having a diameter of 3υ is held so as to be tiltable in the front and rear direction around a pin (331), and a spring (341) that raises the lock plate 03 forward is held by this pin 6~.Furthermore, a frame (2'D A bushing plate 65I, which is an actuating body, is attached to the bottom left side of the bottom so that it can slide freely by being biased forward by a spring. It has a wide portion 6D and a narrow portion G81 that projects upward.Furthermore, a notch (4G) and a mounting piece (4υ) for holding the PC board B9 are formed in the frame (271).

Next, on the bottom of the frame (27), a clamp release body (43) having a button (43) protruding from the front panel (C) is pressed forward by a spring (moon) to release the guide pin (3). This clamp release body (4□□□ is made of sheet metal, and on the right side there is a notch (claw I3 of 321) that engages with the lock play) (claw I3 of 321). 451 is formed, and an upper edge (4G
) A push-up edge (4η) is formed that slopes downward from the top.

A cassette holder (481) that slidably holds the disk cassette (4) is provided at the top of the lamp release body (43). C)
Opposing the slit (49) formed in the guide groove, the lower surface is largely open, and two protrusions 6I made of pins supported by the guide grooves are attached to each side.

This cassette holder (4 camphors) is biased toward the front panel (251 side and the base (1) side) by a spring (5υ).

Furthermore, leaf springs (b) are attached to both sides of the cassette holder 4 to press the disk cassette (4) into contact with the bottom of the cassette holder (9). Furthermore, the cassette holder (48) includes a receiving piece Q that contacts the rear edge of the disk cassette (4), a receiving piece 64) that contacts the slope (a) of the disk cassette (4), and a receiving piece Q that contacts the rear edge of the disk cassette (4), and A protruding piece 6ω, which is a pressing portion facing the wide portion 6n, and a notch (G) corresponding to the narrow portion (3) are formed. Further, a lever (57) is attached to the cassette holder arm so that it can rotate freely around a spindle 61 by being biased by a spring (5). ) is fixed on the pin side, which is the abutting part that engages with the locking recess (24).

Furthermore, a front shutter t61 facing the slit (491) is provided on both sides of the inner surface of the front panel (25).
A guide (6) is integrally molded to hold the cassette holder (6υ) movably up and down. (64) is integrally formed.Furthermore, a disk attachment detection switch (651) is attached to the base (1) facing the bush spray) 1351.

In this configuration, forward movement of the clamp release body (4) is prevented because its notch (4) is engaged with the claw Gυ of the lock plate (to).
This is a9 shown in FIGS. 2 and 50.

When using, insert the disc cassette (4) into the front panel (
Insert the cassette holder into the machine through the slit 251 and push it toward the carrier motor (3).

In addition to this, the cassette holder (the protrusion of the guide groove (
The upper edge (461) rising from both sides of the clamp release body (461) reaches above the locking groove (3)
) will not fall to the side. The lever E7 rotates against the force of the spring (581) because the pin (6111) is pushed by the front edge Ogl of the disk cassette (4), and the lever E7 rotates against the force of the spring (581, as shown in Fig. 10). It will be pushed and slide toward the carrier motor (3).If you press the cassette holder (mark 4), the disc cassette (4
) is pushed by the front edge QIJ of the lock play) 33 loosens the spring (341) and tilts backward, and the claw 6υ releases the clamp release body (4, 1) as shown in FIG. As shown in FIG. 3, the clamp release body (4, 1 slides toward the front panel (4) side by the force of the spring (44), and the upper R (461) retreats to the front panel (C) side. Therefore, the cassette holder The decoy is a disk cassette (
4) together with the spring (5υ force causes the pace (1)
It is pulled to the side and the protrusion (50) falls into the locking groove.

The disk cassette (4) is supported by the column (51 (6)) under the pressure of the leaf spring (521), and is also supported by the positioning hole α6.
) and the conical protrusion (7), and is connected to the plate of the magnetic disk (131 (12 is the disk drive shaft aO). Also, to the switch attached to the base (1)) is switched by the bushing plate 65), thereby making it possible to output the disk cassette mounting state as an electric signal Ilj.

In addition, the lever 5 force rotates because the pin is pressed on the disk cassette (4), but the disk shutter eυ is forcibly closed in the process of the bottle (Gω) sliding the front line (1~) of the disk cassette (4). 2. Slide the disk shutter Qυ to the left and open the window (2) formed in the moat and hard case 0a.
When the hot water and hot water match, the bottle β0) is replaced with Hard Cool X14.
) into the locking recess (24). Therefore, even if the pushing hand is released from the disc cassette (4), the lever 67) will not return due to the force of the spring (marked 5) and will maintain the mounted state of the disc cassette (4).

When clamping the cassette holder (arrogantly),
Lever et al? ) is the locking recess 0. Since the disk cassette (4) is held in the correct position, the return force of the lever 57) does not act to eject the disk cassette (4). Bush plate 69mo No. 9
As shown in the figure, since the wide portion C17) is pushed away from the protruding piece 1551, the return force of the arm of the bushing plate does not act as a force for ejecting the disk cassette (4). Therefore, the positioning hole (161) of (4)
and the conical protrusion (7) can be smoothly positioned.

When removing the disk cassette (4), press the button (4 sides) and use the clamp release body (push the first floor toward the carrier motor (3) side and push up edges 147 on both sides) to move the protrusion GI into the guide groove (c).
push it up to the level of Therefore, move the cassette holder (return it to the front panel (decoy side) until the protrusion 6Q is toward the back of the guide groove (2), and the released lock plate 02
1 returns to the front by the force of spring '341, and the claw C (I
Although it was still engaged due to IK, when the cassette holder (sawn) lifted from the base (1), the protruding piece I5 reached the top of the wide part 371 of the bushing plate c3, so the narrow part (to) was cut out. Disk cassette inserted into 6119 (4)
Push out the front panel (251 side).
The pin (60) of the lever 5D is removed from the locking recess (to) of the disc cassette (4), and the lever t57) pushes the cassette (4) into the cassette holder (49). Tsutsu spring l! Rotates with a force of 5gI.

Therefore, operations from loading to unloading the disk cassette (4) can be performed smoothly.

In particular, the positioning of the disk cassette (4) can be performed smoothly. Furthermore, the disc shutter aυ
The opening lever 67) can be used to eject the swivel cassette (4), and the bushing plate 651 that switches the disc attachment detection switch (6ω) can be used to release the lever 6D from the locking recess (to). The number of parts can be reduced and the structure can be simplified.

Effects of the Invention Since the present invention has a groove bottom as described above, when the cassette holder is clamped, the return force of the lever and the actuating body does not act as an ejection force to the disc cassette. This enables smooth alignment between the positioning hole and the protrusion, and when the disc cassette is installed, the actuator is actuated to output a detection signal by switching the disc installation detection switch, thereby preventing lever contact. The disc shutter is kept open by engaging the disc cassette with the western part of the disc cassette.
When releasing the clamp of the cassette holder, the lever is released from the locking recess of the disk cassette using the actuating body that switches the disk attachment detection switch, and the disk cassette can be ejected by the return force of this lever. This has the advantage that the disk cassette can be taken in and out smoothly and the structure can be simplified.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view, FIGS. 2 and 3 are side views showing the operation of the cassette holder, FIG. 4 is an exploded perspective view, and FIGS. Figure 6 is a vertical side view showing the operation of the cassette holder along line A-A in Figure 1, Figure 8g7 is a perspective view of the disc cassette, Figure 8 is a perspective view of the disc cassette seen from the back, and Figure 9 is A partial perspective view showing the relationship between the bushing plate and the disc cassette when the cassette holder is located at a clamping position close to the disc drive shaft. FIG. 3 is a partial perspective view showing the relationship between the plate and the disk cassette. 4... De-f cassette, 7... Conical projection (protrusion), 10... Disk drive shaft, 13... Magnetic disk, 14... Hard case, 16... Positioning hole,
18... Front i of disk cassette, 21... Disk shutter, 24... Locking recess, 25... Front panel, 27... Frame, 28... Guide groove, 2
9... Locking groove, 35... Bush plate (operating body), 43... Clamp release body, 48... Cassette holder, 49... Slit, 50... Protrusion, 55...・
・Protruding piece (suppressing part), 57... Lever, 60... Pin (contact part), 65... Disk attachment detection switch Applicant: Tokyo Electric Co., Ltd.

Claims (1)

[Claims] A front panel having a slit for inserting and removing a disk cassette containing a magnetic disk stored in a hard case is attached to the frame, and a flat cassette holder for holding the disk cassette so as to be freely inserted and removed is provided along the extended surface of the slit. A disk drive shaft is provided opposite to the plane of the cassette holder and has an axis perpendicular to the plane of the cassette holder, a plurality of protrusions are provided on both sides of the cassette holder, and the protrusions are provided on both sides of the frame. A plurality of guide grooves are formed to slidably hold the cassette holder along an extended surface of the slit, and a plurality of locking grooves are formed to allow the protrusion to fall into the disk drive shaft from these guide grooves. A protrusion is provided protruding from the bottom of the frame and biased toward the front panel side and the disk drive shaft side and engages with a positioning hole formed in the bottom surface of the hard case, and the front edge of the protrusion is provided on the hard case. A disk shutter that exposes a part of the magnetic disk is urged in the closing direction and slidably attached to the frame, and the protrusion protruding from the outside of the cassette holder is moved from the locking groove to the guide groove. Attach the clamp release body that is pushed out to the level of
The disc shutter is opened by having an abutting part at the tip that is pressed against the front edge of the disc cassette inserted into the cassette holder, and being rotated by the force received by the abutting part to open the disc shutter. A lever is rotatably attached to the cassette holder, a locking recess is formed on the front edge of the disc cassette to hold the abutting part and maintain the disc shutter in an open state, and the lever is rotatably attached to the front edge of the disc cassette. biasing the lever in a direction in which the disc cassette is inserted from the cassette holder; biasing an actuating body toward the front panel that switches a disc device detection switch when pressed by the disc cassette inserted into the cassette holder; and a suppressing part is attached to the bottom of the frame so as to be slidable, and the cassette holder includes a suppressing part that pushes the actuating body away from the front edge of the disc cassette at a clamp position where the protrusion of the cassette holder engages with the locking groove. A magnetic recording device characterized in that: