JPH0348767Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a disk cassette, such as a microfloppy disk, in which a sheet-like disk is housed in a cassette, which is rotated to write or read information signals. The present invention relates to a disk mounting device in a drive device.

[Conventional technology]

Conventionally, a disk cassette such as a micro floppy disk is installed, and information signals are written on the disk stored in this cassette.
Alternatively, a disk drive device that reads information signals written on the disk has a built-in disk mounting device that mounts the disk on a chuck mechanism of a rotary drive device that rotates the disk. This disk mounting device is constructed so that when a disk cassette is inserted through a disk insertion/ejection opening, a cassette holder is lowered to press and hold the disk cassette on a positioning pin and to mount the disk on a chucking mechanism. The cassette holder of the disk loading device that performs these operations is mounted on a loading plate that is slidably provided on the chassis, and when this loading plate is slid, it can move up and down in a direction perpendicular to the chassis. Be manipulated. When the loading plate is lowered relative to the chassis, it mounts the disk on the chucking mechanism as described above, and when it is lifted up, it releases the chuck from the chucking mechanism and inserts the disk cassette into the disk. Perform the eject operation to the exit side.

By the way, as mentioned above, the loading plate that moves the cassette holder up and down is biased in one direction by a spring, and when ejecting the disk cassette, the loading plate is biased by the biasing force of the spring. It is necessary to slide the device against resistance, and manual operation requires considerable force, making it difficult to maintain good operability. Therefore, it has been proposed that the loading plate is slid and ejected using a drive pin that is rotationally driven by a drive motor.

[The problem that the idea aims to solve]

In the case where the loading plate is operated by a drive pin rotationally driven by the drive motor mentioned above, in order to smoothly eject the disk cassette, the drive pin is quickly and accurately stopped at a fixed position, and the drive pin is rotated by the drive motor. It is necessary to accurately control the stop position of the loading plate to maintain a constant operating position relative to the loading plate.

Therefore, the present invention provides a device that detects the rotational position of the eccentric drive pin that slides the loading plate and allows the switching operation of the changeover switch that controls the on/off switching of the drive motor to be quickly performed. That is.

[Means to solve the problem]

Therefore, the present invention provides a cassette holder that is provided with at least a pair of engaging members on both sides that engage with a vertical positioning guide section provided on a guide piece fixed to the chassis, and a slide guide section that has an inclined cam surface. Mount the engaging member on the loading plate by placing it on the slide guide part,
In a disk mounting device of a disk drive device in which the cassette holder is moved up and down by a sliding operation of the loading plate to mount a disk cassette, the cassette holder is engaged with an engaging portion provided at one end of the loading plate. An eccentric drive pin is provided which is eccentrically rotated by a drive motor that slides the loading plate, and a changeover switch is provided with a switching operator facing one plane of the rotating body to which this eccentric drive pin is attached. A switching operation section is provided for operating the switching operation element, which is provided with a rising surface substantially perpendicular to one plane of the rotating body.

[Effect]

As described above, the present invention provides a switching operation section having a rising surface substantially perpendicular to one plane of the rotating body to which the eccentric drive pin for slidingly operating the loading plate is attached, and the switching operation section allows the eccentric drive to be operated by the switching operation section. Since the changeover switch is operated to change over the drive motor that drives the pin, the rising surface of the changeover operation part causes the changeover operation element of the changeover switch to be operated abruptly, thereby performing a quick changeover operation.

〔Example〕

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

The disk mounting device according to the present invention is one in which a disk cassette in which a sheet-like magnetic disk is rotatably housed in a cassette half is mounted.
In this disk cassette, a central disk made of a metal plate is provided at the center of the magnetic disk, and a center hole and a drive pin insertion hole are provided at the center of the center disk and at positions eccentric from the center.

The center disc is loosely fitted into the chucking mechanism insertion hole provided in the center of the cassette half, and the head insertion hole provided in the cassette half along the radial direction of the magnetic disk is opened and closed by the shutter. It is configured to Furthermore, positioning pin engagement holes are provided in the plane of the cassette half so as to be located on both sides of the shutter. Further, hook pin engaging recesses are provided on both sides of the cassette half on the head insertion hole side. At the corner of the back side opposite to the front side where the head insertion hole etc. of the cassette half are provided, there is an erroneous erasure prevention hole and a removable erroneous erasure prevention detection piece that covers the erroneous erasure prevention hole. It is provided.

The disk drive device to which such a disk cassette is mounted includes a rotary drive device 15 built into a chassis 18 that rotates the magnetic disks housed in the disk cassette, and a disk chucked to the rotary drive device 15. A disk mounting device 19 constituting the present invention is assembled and attached to a chassis 18 on which a head device 17 is mounted, which is moved by a stepping motor 16 over the inner and outer peripheries of the disk to write or read information signals on the disk.

The disk mounting device 19 that inserts and removes a disk cassette into and from the disk drive device includes a pair of side plates 21 and 22 that are mounted parallel to each other on both sides of the chassis 18, and these side plates 21 and 22.
A loading plate 23 is slidably mounted on the chassis 18, and a cassette holder 24 is mounted on the loading plate 23 with a gap for inserting a disk cassette.

Guide rollers 25 and 25 protruding from both sides of the rear side of the cassette holder 24 are engaged with the inner sides of each of the side plates 21 and 22.
Guide pieces 27, 27 are formed upright and are provided with vertical positioning guide grooves 26, 26, which are vertical positioning guide portions that position and slide guide the chassis 18 in the vertical direction.

In the center of the loading plate 23,
A U-shaped cutout recess 28 is formed with the rear side facing the rotary drive device 15 open, and on both sides supports the cassette holder 24 in a floating position when the disk cassette 1 is ejected and in a state where it can be inserted. Slide guide portions 29, 29, 29, 2 are formed with inclined cam surfaces 29a, 29a, 29a, 29a for floating the cassette holder 24 in a state where the cassette holder 24 is in a state where the cassette holder 1 is held under pressure.
9 are formed in pairs rising up.

The cassette holder 24 has cassette holding portions 30 with a U-shaped cross section bent on both sides so as to guide the insertion of the disk cassette 1 and to hold it therein. On both sides of this cassette holder 24, a pair of guide rollers 31, 31 are provided protrudingly provided on the front side together with the guide roller 25 on the inner side.
1 and 31 on the respective slide guide portions 29, 29, 29, 29 of the loading plate 23, and the inner guide rollers 25, 25 are engaged with the vertical positioning guide grooves 26, 26. They are placed on the loading plate 23 so as to overlap.

A cassette holder drive arm 32 is rotatably mounted on the cassette holder 24 via a support shaft 33 across the width of the cassette holder 24. The cassette holder drive arm 32 is urged to rotate in the direction of arrow A in FIG. 1 by a first tension spring 34 stretched between one end of the arm 32 and the cassette holder 24. The above cassette holder drive arm 32
A lock pin 36 that engages with a first lock pawl 35 formed upright on one side of the loading plate 23 is provided at the other end. moreover,
A loading lever 37 is attached to one side of the cassette holder 24, which is one end side of the cassette holder drive arm 32, so as to be slidable in the direction of insertion and removal of the disk cassette 1. This loading lever 37 has an elongated hole 39 in guide pins 38, 38 set up on the cassette holder 24.
39, and is slidably attached within the range of the elongated holes 39, 39, and is pulled in the direction of arrow B in FIG. is energized by

On the base end side of the loading lever 37, a hook lever 42 is rotatably attached via a support shaft 43, the tip of which is provided with a hook pin 41 that engages with the pin engagement recess of the disk cassette hook. . This hook lever 42 is rotated by a hook lever biasing spring 44 stretched between it and the loading lever 37 so that the tip hook pin 41 protrudes into the inside of the cassette holder 24 (in the direction of arrow F in FIG. 1). Forced. Incidentally, the middle portion of the foot lever 42 is locked to one side wall of the cassette holder 24, and the rotational biasing position is restricted.

Further, at a position facing one side of a U-shaped notch 45 provided in the center of the cassette holder 24, a shutter arm 46 for opening and closing the shutter of the disk cassette is rotatable via a support shaft 47. installed. An engagement pin 48 is attached to the distal end of the shutter arm 46 so as to hang down and engage with an engagement recess formed on one side of the shutter of the disk cassette. Further, a lock arm 4 that locks the movement of the cassette holder 24 by using a common support shaft 47 of the shutter arm 46 is provided.
9 is provided. This lock arm 49 is
A lock pin 51 is provided at the tip of the loading plate 23 and engages with a second lock pawl 50 formed upright on one side of the loading plate 23.
The cassette holder 24 is engaged with the lock claw 50 of the cassette holder 24.
lock. The lock arm 49 has an engagement piece 5 formed upright on the side facing the lock pin 51.
2 is engaged with and attached to a substantially rectangular engagement hole 53 protruding from the shutter arm 46, and rotates in conjunction with the rotation of the shutter arm 46. Furthermore, on the other side of the cassette holder 24, an arm 54 for preventing reverse insertion of the disk cassette 1 is rotatably attached via a support shaft 55.

A third tension spring 56 is stretched between the shutter arm 46 and the reverse insertion prevention arm 54, and the shutter arm 49 is connected to the arrow C in FIG.
The reverse insertion prevention arm 54 is urged to rotate inward of the cassette holder 24 in the direction of arrow D in FIG. The shutter arm 46 and the reverse insertion prevention arm 54 have engaging pins 48 and 57 provided at their respective ends that engage a portion of the cassette holder 24 to restrict their rotationally biased positions.

As described above, the cassette holder drive arm 32,
Attach the loading lever 37, foot lever 42, shutter arm 46, etc., and move each guide roller 25, 25, 31, 31 to the slide guide portion 29, 29, 29, 29 of the loading plate 23.
The cassette holder 24 placed on top has compression springs 58 and 5 stretched between each side plate 21 and 22.
9, it is urged toward the chassis 18 and attached. When the cassette holder 24 is in the eject state in which the disk cassette can be inserted and removed, the guide rollers 25, 25, 31, 31 move against the slide guides of the loading plate 23, as shown in FIG. Part 29, 29, 2
9, 29 upper horizontal surface 29b, 29b, 29b,
It is placed in a floating position supported on 29b. The cassette holder drive arm 32 is urged to rotate in the direction of arrow A in FIG. The first formed
The loading plate 23 is not moved in the direction of arrow E in FIG. 1, and the cassette holder 24 is held in the floating position as shown in FIG. 3. When the cassette holder drive arm 32 is urged to rotate in the direction of arrow A in FIG. It is placed in a state where it is moved to the exit side.
In this state, this loading lever 37
The foot lever 42 attached to the proximal end side is biased by a foot lever biasing spring 44, and the end portion 42
2a is applied to the end 24a of the cassette holder 24, and the hook pin 4 at the tip is pressed against the spring 44.
1 faces a notch provided in the side wall of the cassette holder 24 so that it can escape to the outside of the cassette holder 24. Furthermore, shutter arm 4
6 is rotatably biased so that the engagement pin 48 is locked to one side of the notch 45 of the cassette holder 24, and the lock arm 49 is rotated in the direction of arrow C in FIG. 1 to load the lock pin 51. plate 2
It is locked by a second lock pawl 50 formed at 3.

The chassis 18 also includes a pair of engagement positioning pins 61, 61 whose tips fit into positioning pin engagement holes of the disk cassette that position and support the disk cassette inserted and removed by the disk mounting device 19. A pair of abutment positioning pins 62, 62 are set up to abut against the flat surface of the disk cassette.

Further, the rotary drive device 15 built into the chassis 18 rotates the disk chucking mechanism 63 to which the magnetic disk 3 housed in the disk cassette 1 is positioned and mounted, and the disk chucking mechanism 63. It consists of a motor that

Furthermore, an eject mechanism 70 having an eccentric drive pin 71 rotationally driven by a drive motor 69 is attached to one end of the rear side of the loading plate 23 through one side plate 22 attached to the shutter 18. There is. As shown in FIG. 4, this eject mechanism 72
a drive motor 69 mounted on a motor mounting base 70 mounted on the motor mounting base 70 mounted on the drive motor 6;
A reduction gear mechanism 74 consisting of a plurality of gears connected to and driven by a worm gear 73 attached to an output shaft of 9, and an eccentricity of the lower surface of a spur gear 75 located at the leading edge of this reduction gear mechanism 74. The eccentric drive pin 71 is provided at a protruding position. Further, the eject mechanism 70 is configured such that the eccentric drive pin 71 projects into an engaging portion 77 formed as a rectangular notch in a slide operation portion 76 protruding from one end of the rear side of the loading plate 23. mounted on.

Furthermore, a changeover switch 78 is installed which detects the rotational position of the eccentric drive pin 71 via the motor mounting base 72 and controls the eccentric drive pin 71 so that it is stopped at a fixed position. This changeover switch 78 has a changeover operator 79 facing the top surface of a spur gear 75 on which an eccentric drive pin 71 is protruded, and a changeover operator 79 that is protruded from one plane of the spur gear 75 and is pressed and operated by a switch operation part 80. The stop position of the eccentric drive pin 71 is controlled by switching.

By the way, the switch operation unit 80 that presses the changeover operator 79 of the changeover switch 78 is as follows.
As shown in FIG. 6, it has a gentle slope 80a on which the switching operator 79 gradually rides, and a rising surface 80b that rises approximately perpendicularly to the plane of the spur gear 75, which is a rotating body. ing. Therefore, the spur gear 75 rotates and the switching operator 79 moves to the inclined surface 80a.
When it runs over and reaches the rising surface 80b, it falls onto the steep plane of the spur gear 75, and the changeover switch 7
8 quick switching takes place.

The switch operating section 80 is operated by the operating element 79 when the eccentric drive pin 71 reaches a predetermined position facing the front end side of the reduction gear mechanism 74.
The rotation detection switch 78 can be switched by operating the rotation detection switch 78. That is, the eccentric drive pin 71 is
Due to the position detection by the rotation detection switch 78, the loading plate 23 is always stopped at a fixed position and protruded from the engaging portion 77 of the loading plate 23.

The eccentric drive pin 71 engages with the rear end side 77a of the engaging portion 77 in the loading state in which the loading plate 23 guides the cassette holder 24 to the disk cassette mounting position where it has been lowered toward the chassis 18. ing. Therefore,
When the eccentric drive pin 71 is rotationally driven in the direction of the arrow in FIG. 5, the loading plate 23 is moved in the direction of the arrow Y in FIG.
4 from the chassis 18 side and performs an eject operation.

Furthermore, since the engaging portion 77 has a longer diameter than the sliding amount when the loading plate 23 is ejected, the loading plate 23
are slid independently without engaging with the eccentric drive pin 71.

Next, the operation of mounting a disk cassette using the disk mounting device 19 according to the present invention will be explained.

First, when a disk cassette is inserted into the cassette holder 24 through the disk cassette insertion/removal port 81 in the state shown in FIG. 2
4. At this time, shutter arm 4
The engagement pin 48 at the tip 6 engages with the engagement recess of the disk cassette, and the shutter is placed in a state where it can be opened. Here, when the disk cassette is further inserted into the cassette holder 24, the shutter arm 46 is rotated in the direction of arrow C in FIG. 2 against the third tension spring 56, and the lock arm 49
rotate in the same direction. When this lock arm 49 is rotated in the same direction, the lock pin 51 is disengaged from the second lock pawl 50. Then, the cassette holder drive arm 32, which is biased to rotate by the first tension spring 34, is rotated in the direction of arrow A in FIG. This cassette holder drive arm 32
When the cassette holder 24 is rotated, the cassette holder 24
Since the guide rollers 25, 25 are engaged with the vertical positioning guide grooves 26, 26 perpendicular to the chassis 18, the cassette holder 24 can be moved without sliding horizontally with respect to the chassis 18 surface.
The locking pin 36 pushes the locking pawl 35 in the direction of arrow E in FIG. 1 to move the loading plate 23 on which it is placed, and at the same time moves the loading lever 37 in the opposite direction of arrow B in FIG. The disk cassette 1 is moved inside the cassette holder 24, and the shutter arm 46 is rotated to release the shutter 9 as shown in FIG.
to open. When the loading plate 23 moves, the cassette holder 24, which is biased by the compression springs 58 and 59, slides into the slide guide portions 29 and 2 provided on the loading plate 23.
9, 29, 29 inclined cam surfaces 29a, 29a, 2
Each guide roller 25, 2 along 9a, 29a
5, 31, 31 are guided and pressed down to the chassis 18 side. When the cassette holder 24 is lowered and crimped, the disk cassette inserted and held here is placed and positioned on each positioning pin 61, 61, 62, 62. The disk in the disk cassette is rotated by a rotation drive device 15 to rotate the center disk.
The center disk is placed and mounted on the disk chucking mechanism 63, and as the rotary drive device 15 rotates, the chucking mechanism 63 is chucked and rotated, making it possible to write or read information signals. Become.

To eject the disk cassette 1 mounted as described above, the drive motor 69 is driven by operating, for example, an eject button (not shown). When the drive motor 69 is driven, the eccentric drive pin 71 engaged with the engagement portion 77 of the loading plate 23 as shown in FIG. When the loading plate 23 is rotated in the direction of the arrow Y, the loading plate 23 is moved in the direction of the arrow Y by an amount corresponding to approximately twice the eccentricity of the eccentric drive pin 71. When the loading plate 23 moves, the guide rollers 25, 25, 31, 3 of the cassette holder 24 move.
1 onto the inclined cam surfaces 29a, 29a, 29a, 29a of the slide guide parts 29, 29, 29, 29, and the horizontal surfaces 29b, 29b, 29b, 2
9, and the cassette holder 24 is floated as shown in FIG. The cassette holder 24 has slide guide parts 29, 29, 29, 29
When floated upward, the lock pin 36 at the tip of the cassette holder drive arm 32 locks into the first lock pawl 35 of the loading plate 23, and the cassette holder drive arm 32 is rotated against the biasing force of the first tension spring 34. Ru. When the cassette holder drive arm 32 is rotated in the direction of arrow A in FIG. 6, the loading lever 37 is moved by the second tension spring 40 in the direction of arrow B in FIG. It is pressed toward the disk cassette insertion/ejection port 81 and is ejected by protruding. At this time, the hook lever 42 is slightly rotated to the outside of the cassette holder 24, and the hook pin 41 is disengaged from the disk cassette. Further, the shutter arm 46 and the lock arm 49 are rotated by the third tension spring 56 so that the lock pin 51 engages with the second lock pawl 50. And Figures 2 and 3
The ejection state shown in the figure is reached.

During the eject operation, the eccentric drive pin 71 is rotated even after the loading plate 23 is moved, and rotates until the rotation detection switch 78 is operated by the switch operation section 80 provided on the spur gear 75. As shown in FIG. 5, the switch stops at the same position and continues to rotate even after the loading plate 23 is moved until the changeover switch 78 is operated by the switch operating section 80 provided on the spur gear 75. , and stop at the same position as shown in FIG. 5, and when the loading plate 23 is moved to the disk cassette loading position, it engages with the engaging portion 77.

Further, the above-mentioned eject operation can also be performed manually. The eccentric drive pin 71 engages with the engaging portion 77 only when the loading plate 23 reaches the loading position, and rotates in this state to slide the loading plate 23. By stopping the loading plate 23 at the stop position without rotating it, the loading plate 23 can be moved and ejected by pressing the eject operation part 85 provided on the loading plate 23.

[Effect of idea]

As described above, the present invention provides a switching operation section having a rising surface substantially perpendicular to one plane of the rotating body to which the eccentric drive pin for slidingly operating the loading plate is attached, and the switching operation section allows the eccentric drive to be operated by the switching operation section. Since the switching operation is performed by switching the switching operation of the drive motor that drives the pin, the switching operation element of the switching switch is operated sharply by the rising surface of the switching operation section, and a quick switching operation is performed.

Therefore, by detecting the rotational position of the eccentric drive pin that slides the loading plate, the changeover switch that controls the eccentric drive pin to turn the drive motor on and off can be quickly operated.

Then, it is possible to quickly and accurately stop the drive pin at a fixed stop position, to accurately control the stop position of the drive pin, and to maintain a constant placement on the loading plate.

[Brief explanation of the drawing]

FIG. 1 is an exploded plan view of a disk drive device into which the device of the present invention is incorporated, FIG. 2 is a plan view of the device in an ejected state, FIG. 3 is a side view thereof, and FIG. 4 is a plan view of the ejected state of the device. FIG. 5 is a perspective view showing the mechanism, FIG. 5 is a plan view showing the relationship between the loading plate and the eccentric drive pin in the loading state, and FIG. 6 is a sectional view showing the switching operation section provided on the spur gear. . 18... Chassis, 24... Cassette holder, 25, 31... Guide roller, 26... Vertical positioning guide groove, 29... Slide guide section,
29a... Inclined cam surface, 69... Drive motor, 7
5... Spur tooth gear, 78... Changeover switch, 79
...Switching operation element, 80...Switch operation section, 8
0b...Rising surface.

Claims (1)

[Scope of utility model registration request] A cassette holder, which is provided with at least a pair of engaging members on both sides that engage with a vertical positioning guide part provided on a guide piece fixed to the chassis, is mounted on a loading plate provided with a slide guide part having an inclined cam surface. In a disk mounting device for a disk drive device, the engaging member is placed and attached on the slide guide portion, and the cassette holder is moved up and down by the sliding operation of the loading plate to mount the disk cassette. An eccentric drive pin is provided which is eccentrically rotated by a drive motor that engages with an engaging portion provided at one end of the loading plate and slides the loading plate, and is attached to one of the rotating bodies to which the eccentric drive pin is attached. A disk in a disk drive device, comprising a changeover switch with a changeover operator facing a flat surface, and a changeover operation part for operating the changeover operator, which is provided with a rising surface substantially perpendicular to one plane of the rotating body. Mounting device.