JPH0237161Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording/reproducing device for a disk cartridge such as a magnetic disk cartridge, and particularly to an emergency eject mechanism thereof.

This type of conventional eject mechanism generally utilizes the rotational force of a motor, decelerates it, and ejects the magnetic disk cartridge. As a result, the structure, including the deceleration means, is complex, large, and thick, making it difficult to take out the disk cartridge easily if a mechanical problem occurs during operation, which reduces overall reliability. There's a problem.

The purpose of the present invention is to eliminate these drawbacks of the conventional technology, to have a simple structure, to be smaller and thinner, and to make it easier to take out the disk cartridge even if trouble occurs during operation. To provide a highly reliable recording and reproducing device for a disk cartridge.

In order to achieve this objective, the present invention provides a cam plate that is elastically biased toward the disk cartridge insertion port and is movable in contact with the disk cartridge, and an engaging portion provided on the cam plate that engages with the cam plate. a lock lever that has an engaging part that can be engaged with the engaging part and is elastically biased in a direction in which the engaging part engages with the engaging part of the cam plate; and a lock lever that stores a force for discharging the disk cartridge when the disk cartridge is inserted. an eject lever; an electromagnetic solenoid that is energized based on an eject signal to move the lock lever to disengage it from the cam plate; and an electromagnetic solenoid that moves the lock lever by manual operation to disengage it from the cam plate; The device is characterized by being equipped with an emergency release lever.

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of the recording and reproducing apparatus and the magnetic disk cartridge before the magnetic disk cartridge is installed, FIG. 2 is a plan view of the recording and reproducing apparatus after the magnetic disk cartridge is installed, and FIGS. The figure is a side view seen from inside the side plate to explain the operation of the cam plate, Figures 5 and 6 are side sectional views to explain the operation of the load lever, and Figure 7 is a side view of the emergency eject lever. It is a side view seen from the outside of a side plate for explaining operation.

First, the general configuration of the recording/reproducing apparatus will be explained with reference to FIG. 1. Disposed at predetermined positions on the frame 1 are a disk rotating shaft 2, a carriage 3 on which a magnetic head and pads are mounted, a stepping motor 4 for moving the carriage 3, and the like.

A pair of side plates 5, 5 are screwed to both sides of the frame 1, and a cartridge holder 7 is arranged inside one side plate 5 via a load lever 6.
This cartridge holder 7 faces above the disk rotation shaft 2. Although not shown, a cartridge insertion opening is provided at the right end of the cartridge holder 7 in FIG. 1, from which the magnetic disk cartridge 8 is inserted toward the carriage 3 side. The magnetic disk cartridge 8 includes a case 11 which is molded from hard synthetic resin and has a magnetic head insertion port 9, a rotating shaft insertion port 10, etc. formed at predetermined positions.
It consists of a magnetic disk 12 rotatably housed in a case 11, a shutter 13 that covers a magnetic head insertion opening 9 of the case 11, and the like. The shutter 13 is located between the side plate 5 and the carriage 3.
An eject lever 14 is provided for opening and accumulating force for ejecting the disk cartridge. The overall structure is as described above.

A cam plate 15 is attached to the inner surface of one side plate 5 so as to be slidable in the longitudinal direction. That is, as shown in FIGS. 3 and 4, two elongated holes 16, 16 are bored in the cam plate 15, and pins 17, 17' implanted in the side plate 5 are inserted into the elongated holes 16, 16, respectively. As a result, the cam plate 15 is slidably supported. Further, a locking pawl 18, which is a locking portion, is formed at the tip of the cam plate 15, and a spring hooking protrusion 19 and a cam portion 20 are further provided in the middle. One end of a tension spring 21 is hung on the spring hook protrusion 19, and the other end of the tension spring 21 is hooked on a spring hook 22 formed on the load lever 6, and the cam plate 15 is It is always elastically biased toward the cartridge insertion port. The cam portion 20 is composed of an upper flat portion 20a, an inclined portion 20b, and a lower flat portion 20c, and a vertically long window hole 23 is bored in the portion of the side plate 5 facing the cam portion 20, as shown in the figure. Although not included, a similar window hole is also bored in the opposing portion of the other side plate 5.

A rotary lever 24 is rotatably supported around a shaft 25 near the center upper end of the cam plate 15.
The tip of the rotary lever 24 is bent inward to form a contact portion 26 that contacts the magnetic disk cartridge 8, as shown in FIGS. Reference numeral 27 denotes a holding plate made of a leaf spring. One end of this holding plate 27 is fixed to the upper surface of the cartridge holder 7, and the other end is in elastic contact with the rotation lever 24. Further, 28 is a stopper formed by protruding a part of the cam body 15, and the rotary lever 24 is prevented from rotating downward from the horizontal position by coming into contact with this stopper 28.

A lock lever 29 is supported on the inner surface of the side plate 5 so as to be rotatable about a support pin 30 in correspondence with the cam body 15. One end of the lock lever 29 is provided with an engaging portion 31 that can engage with the locking pawl 18 at the tip of the cam body 15.
A tip of a hanging portion 32 provided at the other end of the electromagnetic solenoid 33 is connected to an armature 34 of an electromagnetic solenoid 33 . The lock lever 29 is
is always elastically biased around the support pin 30 in the direction in which the engaging portion 31 engages with the locking pawl 18 .

A locking member 3 is located near the center of the inner surface of the side plate 5.
6 is rotatably supported around a support shaft 37. A coil spring 38 is stretched between the lock member 36 and the pin 17, and the coil spring 38 elastically urges the lock member 36 to always rotate in the direction of the cartridge insertion port.

The load lever 6 is rotatably supported by the side plates 5, 5 around support pins 39, 39,
Due to the tension spring 21, the bearing pin 39,
39 is elastically biased downward, that is, toward the load position. The load lever 6 and the cartridge holder 7 arranged inside the load lever 6 are rotatably connected by connecting pins 40, 40, and the tips of these pins 40, 40 are attached to the side plates 5, 5.
A roller 41 is loosely fitted into one pin 40 and comes into contact with the cam portion 20 of the cam plate 15. The tip of the load lever 6 can engage with a stepped portion 42 provided at the upper end of the locking member 36, and the load lever 6
By engaging the step portion 42 of the locking member 36, the load lever 6 is prevented from rotating and the cartridge holder 7 is held at the eject position. A release pin 43 that comes into contact with the lock member 36 to release the engagement between the load lever 6 and the stepped portion 42 is implanted in the cam plate 15, and also brings the load lever 6 and the stepped portion 42 into the engaged state again. A protrusion 44 for returning to the cam plate 15 is integrally formed with the cam plate 15.

As shown in FIG. 7, a pair of guide pins 45, 45 are installed on the outer surface of the side plate 5 at an appropriate distance apart, and an emergency eject lever 46 is slidably mounted on the guide pins 45, 45. is mated to. The emergency eject lever 46 is provided at its tip with a pressing portion 47 that can come into contact with the upper end of the lock lever 29, and the rear end of the emergency eject lever 46 is provided with a hook-shaped bent portion 48. This bent part 4
8 faces a hole (not shown) in the front panel. A return spring 49 is stretched between the emergency eject lever 46 and the side plate 5, and the emergency eject lever 46 is always elastically biased toward the cartridge insertion port side by the return spring 49. There is.

Next, the operation until the magnetic disk cartridge 8 is installed in the recording/reproducing apparatus will be explained.

As mentioned above, FIGS. 1, 3, and 5 show the state before the magnetic disk cartridge 8 is inserted. In this state, as shown in FIG. 3, the cam plate 15 is drawn toward the cartridge insertion opening by the force of the tension spring 21, and the upper flat portion 20a of the cam plate 15 faces the window hole 23 of the side plate 5. Therefore, the roller 41 rides on the upper flat portion 20a, so the load lever 6 cannot rotate downward, and the cartridge holder 7 is held at the standby position, that is, the eject position.

Since the electromagnetic solenoid 33 is not energized,
Due to the elastic force of the coil spring 35, the lock lever 29 is stopped when it hits the cam plate 15. Since the cam plate 15 is drawn toward the cartridge insertion port as described above, the locking pawl 18 of the cam plate 15 and the engaging portion 31 of the lock lever 29 are separated from each other and are in a non-meshing state. Further, the tip of the load lever 6 is placed on the stepped portion 42 of the lock member 36, and is held so as not to rotate downward. Furthermore, as shown in FIG. 1, the tip of the eject lever 14 faces toward the disk insertion slot.

In this condition, the magnetic disk cartridge 8
When inserted into the cartridge holder 7, the
The tip of the eject lever 14 is the shutter 13
touches the edge of the When the magnetic disk cartridge 8 is inserted, the eject lever 14 rotates clockwise in FIG. 1, and the shutter 13 opens to expose the magnetic head insertion port 9.

While inserting this magnetic disk cartridge 8,
The distal end of the cam plate 15 comes into contact with the contact portion 26 of the rotary lever 24, and the insertion force causes the cam plate 15 to move toward the lock lever 29 against the elasticity of the tension spring 21. Then, the locking claw 18 of the cam plate 15 locks into the lock lever 29.
By pushing up the engaging part 31, the locking pawl 18 and the engaging part 31 engage with each other as shown in FIG. This engagement locks the cam plate 15 from returning to its original position. As the cam plate 15 moves, the inclined portion 20b faces the window hole 23 of the side plate 5, and in the locked position of the cam plate 15, the vicinity of the lower end of the inclined portion 20b faces the window hole 23. When the cam plate 15 is locked, the tip of the load lever 6 is still supported by the step 42 of the locking member 36, so the load lever 6 does not rotate downward. The cartridge holder 7 connected via the cartridge holder 7 is held at the initial eject position. Therefore, the roller 41 is connected to the window hole 2.
3, and is separated from the inclined portion 20b.

As described above, when the magnetic disk cartridge 8 is further inserted after the cam plate 15 is locked, the release pin 43 comes into contact with the locking member 36 and rotates the locking member 36, as shown in FIG.
Due to this rotation, the tip of the load lever 6 comes off the stepped portion 42, and the load lever 6 rotates in the lowering direction (loading direction) about the support pin 39 by the tensile force of the tension spring 21. With this rotation, the connecting pin 40 and the roller 41 move down inside the window hole 23, so that the cartridge holder 7 also moves toward the disk rotating shaft 23.
The magnetic disk cartridge 8 is positioned at a predetermined position and is ready for recording and reproducing operations. When the magnetic disk cartridge 8 has been installed in this manner, the roller 41 is located at the lower flat portion 20c as shown in FIG.

Next, the ejecting operation of the magnetic disk cartridge 8 will be explained.

When the electromagnetic solenoid 33 is excited based on an eject signal from a control section (not shown), the armature 34 resists the elastic force of the coil spring 35.
is pulled, thereby causing the lock lever 29 to rotate counterclockwise in FIG. 4, and the locking pawl 18 and the engaging portion 31 are disengaged. Then, the cam plate 15 is pulled back toward the cartridge insertion port by the restoring force of the tension spring 21. As the cam plate 15 moves, the roller 41 ascends on the inclined portion 20b and finally rides on the upper flat portion 20a as shown in FIG. As a result, the load lever 6 rotates upward against the elastic force of the tension spring 21 and locks again with the stepped portion 42 of the locking member 36, which is rotated back by the coil spring 38 and the protrusion 44, and is magnetically The cartridge holder 7 containing the disk cartridge 8 is pushed up from the load position to the eject position. When the magnetic disk cartridge 8 is pushed up to the eject position, the magnetic disk cartridge 8 is pushed up by the rotation return force of the eject lever 14 and the movement of the rotary lever 24 toward the cartridge insertion slot as the cam plate 15 retreats. The cartridge is ejected from the cartridge holder 7.

If the electromagnetic solenoid 33 is out of order or for some reason the electromagnetic solenoid 33 does not operate even if an eject signal is applied, the emergency eject lever 46 is used to eject the magnetic disk cartridge. That is, when the bent portion 48 of the emergency eject lever 46 is pushed in the direction of the arrow in FIG. Therefore, the electromagnetic solenoid 33 is in the same state as being attracted, and this causes the locking pawl 18 and the engaging portion 3 to
1 is disengaged and the magnetic disk cartridge 8
can be discharged.

In the above embodiment, the upper end of the lock lever 29 is pressed by the emergency eject lever 46 and the lock lever 29 is rotated to urgently eject the magnetic disk cartridge 8 in the event of trouble. The contact point with the lock lever 29 is not limited to the above embodiment. For example, the emergency eject lever 46 can be brought into contact with the lower end of the hanging portion 32 of the lock lever 29, and the emergency eject lever 46 can be moved forward. Therefore, the lock lever 29 may be rotated to release the engagement between the lock lever 29 and the cam plate 15.

The present invention has the above-mentioned structure, and is simpler and cheaper in structure than the above-mentioned conventional one, and can be made smaller and thinner. Furthermore, even if there is a problem during operation and the electromagnetic solenoid does not operate, by manually operating the emergency eject lever, it is possible to release the engagement between the cam plate and the lock lever and remove the disk cartridge cartridge. Therefore, handling becomes convenient and reliability can be improved.

[Brief explanation of the drawing]

All of the figures are for explaining the recording and reproducing device for a disk cartridge according to an embodiment of the present invention, and FIG. 1 is a plan view of the recording and reproducing device and the magnetic disk cartridge, showing the state before the magnetic disk cartridge is installed. , FIG. 2 is a plan view of the recording/reproducing device after the magnetic disk cartridge is installed, FIGS. 3 and 4 are side views seen from inside the side plate to explain the operation of the cam plate, and FIGS. Figure 6 is a side sectional view for explaining the operation of the load lever.
FIG. 7 is a side view of the side plate seen from the outside for explaining the operation of the emergency eject lever. 8... Magnetic disk cartridge, 14... Eject lever, 15... Cam plate, 18... Locking claw, 29... Lock lever, 31... Engaging portion, 4
6... Emergency lever.

Claims (1)

[Scope of utility model registration request] Elastically biased toward the cartridge insertion port,
A cam plate movable in contact with the disk cartridge, and a hooking portion capable of engaging with an engaging portion provided on the cam plate, and a direction in which the hooking portion engages with the engaging portion of the cam plate. a lock lever which is elastically biased; an eject lever which accumulates force for ejecting the disk cartridge when the disk cartridge is inserted; 1. A recording and reproducing device for a disk cartridge, comprising: an electromagnetic solenoid for releasing the engagement; and an emergency ejection lever for manually moving the lock lever to release the engagement with the cam plate.