JPH08171766A - Loading device for disk cassette - Google Patents

Abstract

PURPOSE: To prevent a cassette holder in empty state from falling to a cassette loading position and to prevent the occurrence of collision among heads by detecting the insertion of a cassette by a cassette detection mechanism and allowing the down movement of the cassette holder. CONSTITUTION: When a disk cassette is inserted into a cassette holder 3, a pin 63 is activated, the restraint of a cassette detection mechanism 56 and an engagement pin 68 is released, an up and down operation plate 2 is guided by a pin 55 and a long hole 66 and pushed to a forward direction by a spring force. The motion of the plate 2 is transmitted through a tilt guide 36 and a roller 4. The holder 3 holds a disk cassette, is led by a guide groove 5 and moves down to a cassette loading position from a cassette insertion position. If a disk cassette is not inserted into the holder 3, a lock arm 12a of a shutter open and close lever 12 stops the displacement of the mechanism 56 and the movement of the plate 2 caused by the collision during a transportation is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for mounting a disk cassette, and more particularly, to a position where a disk can be chucked in a drive system in a state where a cassette holder into which the disk cassette is inserted is empty. (Hereinafter referred to as position).

[0002]

2. Description of the Related Art Conventionally, as an apparatus for mounting a disk cassette of this kind, there is one as shown in FIGS.

First, as shown in FIGS. 4 to 7, an elevating operation plate 2 is slidably mounted in the front-rear direction (directions of arrows a and b) on a chassis 1 of the apparatus, and the elevating operation plate 2 is erected. The cassette holder 3 is arranged between the left and right side portions 2a. The left and right sides 3a of the cassette holder 3 are opposed to each other and bent in a substantially U-shape, and a pair of front and rear rollers 4 pivotally supported by the both sides 3a are placed on the upper edges of both sides 2a of the lifting operation plate 2. Have been.

[0004] A pair of rear rollers 4 are engaged in vertical guide grooves 5 formed in the left and right side plates 1 a of the chassis 1. A spring 6 for urging the cassette holder 3 downward is provided between the cassette holder 3 and the chassis 1.
Is stretched.

A drive lever 7 is attached to the upper surface of the cassette holder 3 by a fulcrum shaft 8 so as to be rotatable in the directions of arrows c and d, and an arrow c is extended by a drive spring 9 stretched between the drive lever 7 and the cassette holder 3. Is biased to rotate in the direction. A pin 10 implanted at one end of the drive lever 7 has an engaging portion 11 formed at the upper end of one side 2a of the lifting operation plate 2.
Is in contact with Further, a shutter opening / closing lever 12 is attached to a rear end portion of the upper surface of the cassette holder 3 by a fulcrum shaft 13 so as to be rotatable in directions of arrows e and f, and a return spring 14 stretched between the cassette holder 3 and the arrow. It is urged to rotate in the direction e. An opening / closing pin 15 is planted on the lower surface of the tip of the shutter opening / closing lever 12. further,
An engagement lever 16 is also pivotally supported on the fulcrum shaft 13, and is rotatable in the directions of arrows e and f, like the shutter opening / closing lever 12. The engagement lever 16 and the shutter opening / closing lever 12 are configured such that a projection 35 standing on the side edge of the engagement lever 16 is located in a guide hole 34 formed in an intermediate portion of the shutter opening / closing lever 12. ,
When the shutter opening / closing lever 12 rotates a predetermined angle or more in the direction of arrow e, the edge of the guide hole 34 engages with the projection 35, and the shutter opening / closing lever 12 and the engagement lever 16 are interlocked. A receiving plate 17 that is curved in the rotation direction is formed at the tip of the engaging lever 16, and the return spring 14 constantly urges the receiving plate 17 from the side in the direction of arrow e. doing. Further, an engagement pin 18 is planted on the tip side portion of the engagement lever 16, and the engagement pin 18 is formed on the upper end of one side portion 2 a of the lifting operation plate 2 to be engaged. The part 19 can be engaged.

On the other side of the upper surface of the cassette holder 3, a pull-in plate 20 is guided by guide shafts 21 and 21 to arrows g and g.
A pin 23 planted at the other end of the drive lever 7 is engaged in a notch 22 provided at the front end of the draw-in plate 20 so as to be reciprocally movable in the h direction. An engaging member 24 is attached to the rear end of the upper surface of the retracting plate 20 by a fulcrum shaft 25 so as to be rotatable in the directions of arrows i and j, and a return spring 26 stretched between the retracting plate 20 and the arrow i. Direction. Arm 27 of engagement member 24
Is bent so as to hang downward, and then horizontally bent forward below the cassette holder 3 to form an arm portion 27 thereof.
An engagement pin 28 is implanted on the upper surface of the distal end of the connector.

Next, the displacement of the disc cassette from the insertion position to the mounting position (loading operation) and the displacement from the mounting position to the insertion position (ejection operation) will be described.

First, as shown in FIGS. 4 and 6, the disk cassette 30 is manually inserted to the insertion position in the cassette holder 3 in the direction of arrow h. The disc cassette 30 is a disc (for example, a micro floppy disc) 30a rotatably housed in a thin case 30b made of synthetic resin. This disk cassette 30
When the disc cassette 30 is inserted, the engaging member 24 is once rotated in the direction of the arrow j against the return spring 26 by the front end portion of the disc cassette 30. The return spring 26 rotates in the direction of the arrow i, and the engagement pin 28 is engaged with the engaged portion 31 having a semicircular shape provided on the lower surface of the case 30b of the disc cassette 30. The rotation of the engaging member 24 in the direction of arrow j is escaped by the notch 32 formed in the side portion 3a of the cassette holder 3. As shown in FIG. 4, when the disk cassette 30 is inserted, the shutter opening / closing lever 12 is pressed and rotated in the direction of arrow f against the return spring 14, and the opening / closing pin 15 slides on the disk cassette 30. Is slightly opened in the direction of arrow m.

Next, when the disc cassette 30 is slightly pushed by hand from the above insertion position in the direction of arrow k, the shutter opening / closing lever 12 is further rotated in the direction of arrow f, and is inserted into the guide hole 34 of the shutter opening / closing lever 12. The protrusion 35 of the engaged lever 16 that is engaged is driven, and the engaged lever 16 is rotated in the direction of arrow f as shown in FIG. At this moment, the engaging pin 18 of the engaging lever 16 is
Is disengaged from the engaged portion 19 and the engagement is released. Then, the drive lever 7 is rotated in the direction of arrow c by the drive spring 9, and the retracting plate 20 is moved forward in the direction of arrow g via the pin 23. By the forward movement of the retracting plate 20, the disc cassette 30 is retracted from the insertion position in the cassette holder 3 to the retracted position in the direction of arrow k via the engaging member 24. When the drive lever 7 is rotated in the direction of arrow c, the engaged portion 11 of the elevating operation plate 2 is pressed by the pin 10 and the elevating operation plate 2 is slid in the direction of arrow a. As a result, each roller 4 of the cassette holder 3 is moved to both sides 2 of the elevating operation plate 2.
The cassette holder 3 is guided downward by a pair of front and rear inclined guides 36 formed on the upper edge of the cassette holder 3, and the cassette holder 3 is lowered from the insertion position in FIG. 6 to the mounting position in FIG. As a result, the disk 30a of the disk cassette 30 is horizontally mounted on the turntable 37 on the chassis 1, and is inserted into the head insertion hole 38 which is completely opened by the fully opened shutter 33 as shown in FIG. A recording / reproducing head (not shown) is inserted into the head. Thus, the disk cassette 30 is automatically loaded by the spring force of the drive spring 9.

Next, when an ejection signal is output after desired recording and reproduction, a drive gear 40 is driven to rotate by a motor 39 disposed at the rear end of the chassis 1, and an eccentric roller provided on the drive gear 40 is provided. Lifting operation plate 2 by 41
Is pulled and slid in the direction of arrow b. Then, each roller 4 is guided by the inclined guide 36 of the lifting operation plate 2,
The cassette holder 3 moves up from the mounting position shown in FIG. 7 to the raised position shown in FIG. Also, when the lifting operation plate 2 slides in the direction of arrow b, the pin 10 of the drive lever 7 is pressed by the engaged portion 11, and the drive lever 7 is rotated in the direction of arrow d.
Then, as shown in FIG. 5 to FIG.
The pull-in plate 20 is returned in the direction of the arrow d'via the arrow 3, and the disk cartridge 30 is pushed out from the pull-in position in the cassette holder 3 toward the insertion port in the direction of the arrow l via the engaging member 24. When the disc cassette 30 is pushed out, the engaging lever 16 is moved by the return spring 14 in the direction of arrow e.
The engagement pin 18 is engaged with the engaged portion 19 by being rotated in the direction. After the projection 42 of the engaging member 24 is brought into contact with the rear end of the cassette holder 3, the retracting plate 20 is returned in the direction of the arrow h at the final stage of sliding of the elevating and lowering operation plate 2 to engage the engaging member 24. The member 24 is rotated in the direction of the arrow j against the return spring 26, and the engaging pin 28 of the member 24 rotates.
Is disengaged from the engaged portion 31. Then, the shutter opening / closing lever 12 is rotated by the return spring 14 in the direction of arrow e, so that the shutter 33 is closed in the direction of arrow n and the disc cassette 30 is further moved from the insertion position to the direction of arrow l.
Extruded in the direction and discharged. Thus, the disc cassette 30 is automatically ejected by the motor 39.

[0011]

However, in such a conventional disk cassette mounting apparatus, as shown in FIG. 8, in order to prevent contact and collision between the heads 50 during transportation, It is common to insert a so-called dummy cassette, and every time you carry it,
There was a problem that a dummy cassette had to be inserted.

Further, when the host computer having the disk cassette mounting device as shown in FIG. 9 is dropped or given a shock during use, the cassette holder 3 drops to the mounting position and the head 50 is shocked. However, there is a problem that the head 50 is damaged.

The present invention has been devised in view of the above conventional problems, and is intended to obtain a disk cassette mounting apparatus having impact resistance and preventing head damage. To do.

[0014]

SUMMARY OF THE INVENTION Therefore, according to the present invention, there is provided a cassette holder into which a disc cassette is inserted, and the cassette holder is driven and forced forward and backward in the direction in which the disc cassette is inserted. In a device for mounting a disc cassette, which comprises an elevating and lowering operation plate that is displaced up and down to a mounting position, the disc cassette is inserted into the cassette holder while the disc cassette is not inserted into the cassette holder. A locking mechanism that allows the cassette holder to be lowered to the mounting position by releasing the engagement with the lifting operation plate by the pressing force,
The cassette holder is provided with a cassette detection mechanism with a protrusion for detecting the insertion of the disc cassette, and the protrusion of the cassette detection mechanism is pressed by the disc cassette to detect the insertion of the disc cassette. The engagement of the locking mechanism is released only at this time.

Unless the cassette detection mechanism detects that the disc cassette has been inserted into the cassette holder, the locking state of the locking mechanism is maintained and the cassette holder is prevented from dropping from the insertion position to the mounting position. for that reason,
Prevents heads from colliding or adsorbing.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a disc cassette mounting apparatus according to the present invention will be described below with reference to the drawings. The same parts as in the conventional example are denoted by the same reference numerals, and the description thereof will be omitted. In addition, the disk cassette 30 is used.

FIG. 1 is a schematic exploded perspective view showing an embodiment of the present invention, and FIGS. 2 and 3 are plan views showing operating states. The mounting apparatus according to the embodiment of the present invention is substantially composed of a chassis 1, a lifting operation plate 2, and a cassette holder 3 as in the conventional example.

A flat motor (not shown) is fixed to the lower surface of the chassis 1 and a turntable 37 is fitted on a rotating shaft of the motor. The turntable 37 is disposed so as to protrude from the upper surface of the chassis 1, and pin portions 55 are provided at four places around the turntable 37. Further, the chassis 1 is provided with a pair of heads 50, 50, and a cassette detecting mechanism 56 is attached. This cassette detection mechanism 56
Has a support shaft 57 provided upright on the chassis 1.
7, a shaft hole 59a of the trigger arm 58 is inserted.
The trigger arm 58 has an arm portion formed from the rotation support portion 59 in which the shaft hole 59a is formed, and a lock plate (lock means) 62 is provided at a distal end portion of the arm portion. A protruding pin (projection) 63 is erected on the upper surface of the intermediate portion of the lock plate 62. This trigger arm 58
Is biased clockwise by a torsion coil spring (biasing means) 64. Although not shown, a motor for moving the head, a motor for sliding the elevating operation plate 2, and the like are mounted on the chassis 1.

Positioning pins 65 for positioning the disc cassette 30 are erected on the side plates 1a provided on both sides of the chassis 1, and the vertical guide grooves 5 for restricting the movement of the cassette holder 3 are provided. Is provided.

The elevating operation plate 2 has elongated holes 66 at four locations, and the pin portions 55 are inserted into the elongated holes 66. It is slidable within the movable range. A spring (not shown) is provided between the lift operation plate 2 and the chassis 1, and the lift operation plate 2 is urged downward. The lifting operation plate 2 has a guide groove 67 having an inclined guide 36 for guiding the roller 4 of the cassette holder 3, an engagement pin (projection) 68 engaging with the trigger arm 58, and a sliding of the lifting operation plate 2. And a spur tooth 69 that meshes with a motor (not shown). Lock plate (lock means) for these trigger arms 58
62 and the engaging pin (projection) 68 of the lifting operation plate 2 constitute a locking mechanism 60.

Next, the cassette holder 3 has a cassette insertion space, and a shutter opening / closing lever 12 for opening / closing the shutter 33 of the disc cassette 30 is provided on the upper portion. The shutter opening / closing lever 12 has a substantially rectangular shape, and an opening / closing pin 15 for opening and closing the shutter 33 is provided at one end so as to hang down, and the other end is a lock arm 12a as a locking mechanism. , And are pivotally supported at the bent portion. The shutter opening / closing lever 12 is urged counterclockwise by a spring (not shown). Two pairs of rollers 4 are provided on both sides of the cassette holder 3, and the rollers 4 are arranged in guide grooves 67 of the elevating operation plate 2, and a pair of the rollers 4 is further provided with a vertical guide groove of the side plate 1 a. 5 are arranged.

According to the disk cassette mounting apparatus having the above-described configuration, the cassette holder 3 is set at the insertion position where the disk cassette 30 can be inserted and pulled out into the cassette insertion space and the mounting position where recording and reproduction can be performed on the disk 30a. Displace. When the disc cassette 30 is inserted into the cassette insertion space in the cassette holder 3 as shown in FIGS. 2 and 3, the disc cassette 30 presses the protruding pin 63 when the disc cassette 30 is inserted into the cassette insertion space. The arm 58 rotates counterclockwise to disengage the engaging pin 68 of the elevating operation plate 2, and the elevating operation plate 2 moves forward by the spring force, and the cassette holder 3 moves downward by the spring force. Done.

Here, when the disc cassette 30 is not inserted into the cassette holder 3, as shown in FIG. 2, the lock plate 62 of the locking mechanism 60 and the engagement pin 68 are engaged (shutter opening / closing). Lock arm 1 of lever 12
2a is in a state of abutting engagement with the protruding pin 63 of the trigger arm 58), the trigger arm 58 rotates counterclockwise and the engaging pin 68 is disengaged from the lock plate 62 of the trigger arm 58. Has been blocked. Therefore, even when a strong impact is received due to, for example, a drop in the mounting device, the cassette holder 3 does not drop to the mounting position, and the heads 50, 50 collide with each other or face the heads 50, 50. Can be prevented from being caused by being a mirror surface. Further, since the lock plate 62 also serves as a part of the cassette detecting mechanism 56 and a part of the locking mechanism 60, the cost of the entire mechanism can be reduced.

The change of the cassette holder 3 from the mounting position to the insertion position is performed by moving the lifting operation plate 2 backward by the driving force of a motor (not shown) for sliding the lifting operation plate 2.
Along with that, the roller 4 of the cassette holder 3 moves up the inclined guide 36 against the spring force. When the cassette holder 3 has been displaced to the insertion position, the lock plate 62 of the trigger arm 58 engages with the engagement pin 68 to maintain the cassette 6 at the insertion position, and the protruding pin 63 is locked by the lock arm 12a. You. Therefore, the heads 50 are kept separated from each other.

The embodiment has been described above.
Various other design changes can be made. For example, the projections of the cassette detection mechanism 56 and the projections of the locking mechanism 60 are not limited to the protrusion pins 63 and the engagement pins 68, and a lock plate or a lifting operation plate can be used. Of course, it may be constituted by a bent piece formed by bending.

[0026]

As is apparent from the above description, in the disk cassette mounting apparatus according to the present invention, the locked state of the locking mechanism is maintained unless the cassette detecting mechanism detects insertion of the cassette. For example, the cassette holder does not drop from the insertion position to the mounting position even if an impact is applied by mistake during transportation or the like, and the heads can be reliably prevented from being impacted or adsorbed.

Therefore, there is no need to load a dummy cassette as in the conventional case, and there is an effect of improving the economic efficiency and the transport workability.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a disk cassette mounting apparatus according to the present invention.

FIG. 2 is a plan view showing a state before the disk cassette is mounted in the disk cassette mounting apparatus.

FIG. 3 is a plan view showing a state after the disk cassette is mounted in the disk cassette mounting apparatus.

FIG. 4 is a plan view showing a state in which a conventional disk cassette is being mounted.

FIG. 5 is a plan view showing a state where a conventional disc cassette is mounted.

FIG. 6 is a side view showing a state in which a conventional disc cassette is being mounted.

FIG. 7 is a side view showing a conventional state of mounting a disk cassette.

FIG. 8 is a side view showing a state of a conventional head.

FIG. 9 is a side view showing a state of a conventional head.

[Explanation of symbols]

 2 ... Elevating operation plate 3 ... Cassette holder 30 ... Disk cassette 56 ... Cassette detection mechanism 60 ... Locking mechanism 63 ... Projection pin (projection)

Claims (1)

[Claims] 1. A cassette holder into which a disc cassette is inserted, and an elevating and lowering operation plate for driving and forcing the cassette holder up and down between a cassette insertion position and a cassette mounting position by being forcibly driven in the front-back direction of the disc cassette insertion direction. In a device for mounting a disc cassette, the device is engaged with the elevating operation plate in a state where the disc cassette is not inserted into the cassette holder, and is engaged with the elevating operation plate by the pressing force for inserting the disc cassette. A locking mechanism that releases the cassette holder to lower the cassette holder to the mounting position, and a cassette detection mechanism with a protrusion that detects the insertion of a disc cassette into the cassette holder. Is pressed by the disc cassette and the cassette detection mechanism Mounting device of the disc cassette, characterized by being configured so as to disengage the saw the locking mechanism when it detects an incoming.