JPH0142845Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is ideal for application to, for example, a mounting device for a micro floppy disk cassette, and is suitable for horizontally inserting a disk cassette into a cassette holder. This invention relates to a disk cassette mounting device which is configured to lower the cassette holder from the cassette insertion position to the cassette mounting position in a substantially horizontal state, and to horizontally mount the disc cassette to the cassette mounting position. .

[Background technology and its problems]

First, a conventional example of a micro floppy disk cassette mounting device will be explained with reference to FIGS. 1 to 5B.

The cassette holder 1 is supported by a pair of left and right support plates 2a,
2b, and the right and left ends 3a, 3b of the connecting plate 3, which is arranged horizontally between the supporting plates 2a, 2b at the upper part of the cassette holder 1, are connected to the supporting plates 2a, 2b as first fulcrums. The cassette holder 1 is rotatably supported via a shaft 4, and the left and right ends 3a, 3b of the connecting plate 3 are located at positions spaced backward from the first fulcrum shaft 4 at the left and right ends 1a, 1b of the cassette holder 1. and is rotatably supported at approximately the center position in the front-rear direction via a pair of left and right second fulcrum shafts 5a, 5b that are coaxial. It is attached to the front side so as to be slidable in the front-rear direction, and is attached to the front side (arrow a in Fig. 2A) by a spring 6.
The sliding plate 7, which is biased to slide in the direction (direction side), is engaged with one end 3a of the left and right ends 3a, 3b of the connecting plate 3, and this sliding plate 7 moves backward against the spring 6. (in the direction of arrow b in Fig. 2A), the connecting plate 3 is rotated upward (in the direction of arrow c in Fig. 2A) about the first fulcrum shaft 4, and the cassette holder 1
3A, 4A, and 5A, and after the disk cassette 8 has been inserted into the cassette holder 1, the sliding plate 7 is moved forward by the spring 6 (in the direction of arrow a in FIG. 2B). ), the connecting plate 3 is rotated downward (in the direction of arrow d in Fig. 2B) about the first fulcrum shaft 4, and the cassette holder 1 is moved from the cassette insertion position to the 3rd B.
Lower the disc cassette 8 to the cassette mounting position shown in Figures 4B and 5B, and fix the four corners 8a of the disk cassette 8 to the four positioning pins 9, one pair each on the front, rear, left and right sides.
It was configured to be positioned by being engaged on top of a and 9b.

In this case, in the conventional example, the engagement structure between one end 3a of the connecting plate 3 and the sliding plate 7 is as shown in FIGS. 2A and 2B, with the pin 11 and the inclined guide groove 12
It was composed of: That is, the first fulcrum shaft 4 and the second fulcrum shaft 5 are connected at the side surface of one end 3a of the connecting plate 3.
A pin 11 is provided at an approximately intermediate position between the sliding plate 7 and the sliding plate 7, and the pin 11 is engaged with an inclined guide groove 12 provided on the sliding plate 7. As shown in FIG. 2A, when the cassette holder 1 is raised to the cassette insertion position, the sliding plate 7 is slid rearward (in the direction of arrow b) and is locked by the locking plate 13. There is. This lock plate 13 is pivotally supported on one support plate 2a by a fulcrum shaft 14 so as to be rotatable in the vertical direction, and is biased to rotate in the direction of arrow e by a spring 15. A lock portion 16 consisting of a notch is connected to a pin 17 provided on the sliding plate 7.
The sliding plate 7 is locked by engaging with the sliding plate 7.

When the disk cassette 8 is installed, the first
As shown in the figure and FIG. 4A, the disk cassette 8
is horizontally inserted into the cassette holder 1 from the direction of arrow f. The moment the disk cassette 8 comes into contact with the stopper 18 provided integrally at the rear end of the cassette holder 1 to complete insertion, a lock release plate operates under the pressure of the disk cassette 8. (not shown), the locking plate 13 is attached to the spring 1 as shown by the dashed line in FIG. 2A.
5 in the direction of arrow g, and the sliding plate 7 is unlocked. At that moment, the sliding plate 7 is slid in the direction of arrow a by the spring 6, as shown in FIG. 2B. At this time, the pin 11 is moved into the inclined guide groove 1 by the guiding action of the inclined guide groove 12.
2, the connecting plate 3 is rotated in the direction of arrow d, and the cassette holder 1 is lowered to the cassette mounting position.

In this conventional example, when the cassette holder 1 is lowered to the cassette mounting position, the pin 11 enters the lower horizontal portion 12a of the inclined guide groove 12, as shown in FIG. 2B. Therefore, when the cassette holder 1 is lowered to the cassette loading position, it is mechanically stopped by the pin 11 and the lower horizontal portion 12a, and the cassette holder 1 cannot be pressed downward any further. It was constructed in such a way that it could not be influenced at all.

Therefore, in this conventional example, Fig. 1, 4A
As shown in Fig. 4B, the cassette holder 1
A pair of left and right leaf springs 20a, 20b are fixedly attached to the left and right ends 1a, 1b of the top plate 19 by their central parts, and the cassette holder 1 is lowered to the cassette device position as shown in FIG. 4B. The four corners 8a of the disk cassette 8 are elastically pressed onto the four positioning pins 9a and 9b by the front and rear ends 20a' and 20b' of the leaf springs 20a and 20b, respectively. was.

Also, when ejecting the disk cassette 8, the second A
As shown in the figure, the sliding plate 7 resists the spring 6 by arrow b
The pin 11 is slid in the direction of the arrow c, and the pin 11 is raised to the upper horizontal portion 12b of the inclined guide groove 12 by the guiding action of the inclined guide groove 12, whereby the connecting plate 3 is rotated in the direction of the arrow c. The cassette holder 1 was raised to the cassette loading position.

However, in this conventional example, consideration has been given to vertically moving the cassette holder 1 in parallel as the connecting plate 3 rotates in the directions of arrows c and d.

For this reason, first, as shown in FIG. 2A, the connecting plate 3
The so-called arm length l1, which is the center-to-center distance between the first fulcrum shaft 4 and the second fulcrum shaft 5a, 5b of both left and right ends _3a , 3b of the connecting plate 3, is set to be sufficiently long, approximately 30 mm.
is configured to rotate in the directions of arrows c and d at an angle as close to horizontal as possible. Next, the 4th A
As shown in FIG. 4 and FIG. 4B, the connecting plate 3 is on the non-driving side opposite to the driving side of the connecting plate 3 by the sliding plate 7.
On the other end 3b side of the cassette holder 1, the other end 1b of the cassette holder 1 was supported by a parallel quadruple link mechanism 22 consisting of the connecting plate 3 and links 21 of equal length parallel to the connecting plate 3. . That is, a link 21 is attached to the lower part of the other end 1b of the cassette holder 1.
, and its front and rear ends are connected to a pair of fulcrum shafts 23, 2.
4, it is rotatably supported on the other support plate 2b and the other end 1a of the cassette holder 1.

Therefore, in this conventional example, since the arm length l1 is long, the cassette holder ₁ can be moved in parallel up and down.
a, 3b are easily twisted, and the parallel quadruple link mechanism 22 has four fulcrum shafts 4, 5b, 23, 24.
Since the fulcrum shafts 4, 5b, 23, and 24 are pivotally supported by the fulcrum shafts 4, 5b, 23, and 24, play is likely to occur in the pivot portions. For this purpose, the other end 1b of the cassette holder 1
The side was more likely to sink vertically than the one end 1a side due to the load from above.

That is, in the micro floppy disk cassette loading device, first, as shown in FIG. 3B, when the disk cassette 8 is loaded into the cassette loading position by lowering the cassette holder 1, the micro floppy disk cassette is stored in the disk cassette 8. The magnetic disk 26 is mounted horizontally on a turntable 29 which is rotationally driven by a motor 28 with a center disk 27 fixed at its center. Next, by attaching the disk cassette 8 to the cassette mounting position, the pads and head insertion holes 30, 31 provided on both the upper and lower surfaces of the disk cassette 8 are opened.
Inside there is a pad 32 and a recording/playback head (magnetic head) 3.
3 to bring these pads 32 and recording/reproducing head 33 into contact with the upper and lower surfaces of the magnetic disk 26.

At this time, as shown in FIGS. 1, 3A, and 3B, a pad support 34 is pivotally supported on a recording/reproducing head moving table 35 via a fulcrum shaft 36 so as to be freely rotatable in the vertical direction. The pad support 34 is rotated downward (in the direction of arrow h in FIG. 3A) by a spring 37, and is integrally provided in a part of the pad support 34, as shown in FIG. The horizontal arm 38 is brought into contact with an arm receiving part 39 provided horizontally at the rear end of the other end 1b of the cassette holder 1. As shown in FIG. 3B, when the cassette holder 1 is lowered to the cassette mounting position, the pad support 34 is rotated in the direction of arrow h by the spring 37, and the pad 32 is inserted into the pad insertion hole of the disk cassette 8. 30, and the third A
As shown in the figure, when the cassette holder 1 is raised to the cassette insertion position, the pad support 34 is rotated in the direction of arrow i against the spring 37, and the pad 32 is inserted into the disk cassette 8 from within the pad insertion hole 30. It was configured so that it could be extracted above.

Therefore, as shown in FIG. 3A, the weight of the pad support 34 and the spring 37 are placed on the cassette holder 1.
Load F from above consisting of the total load with the additional force of
is constantly acting, and due to the load from above, the other end 1b side of the cassette holder 1 is more likely to sink downward than the one end 1a side. In particular, in the case where recording and reproduction are performed on both sides of the magnetic disk 26, the pad 32 is replaced by a recording/reproducing head, and the weight of the pad support 34 increases, so that the load acting on the cassette holder 1 becomes larger.

On the other hand, in the micro floppy disk cassette mounting device, when the disk cassette 8 is not in use,
As shown in the figure, the four corners 8a of the upper and lower synthetic resin halves 41a, 41b constituting the disk cassette 8 are curved upward in advance with respect to the central portion 8b, so that the upper and lower halves 41a, 41
By utilizing the elasticity of b, the internal magnetic disk 26 is sandwiched between the two from above and below, and rotation and horizontal movement of the magnetic disk 26 within the disk cassette 8 are suppressed as much as possible. After this disk cassette 8 is inserted into the cassette holder 1, when it is mounted at the cassette mounting position as shown in FIGS. 3B, 4B, and 5B,
The four corners 8a of the disk cassette 8 are pressed and fixed onto the four positioning pins 9a and 9b, and at the same time, the center pin 29a of the turntable 29 is passed through the center of the center disc 27 of the magnetic disk 26 to secure the upper half 41a. The upper half 41a and the lower half 41
Correct b horizontally. This creates a gap 42 between the upper and lower halves 41a, 41b that allows the magnetic disk 26 to rotate with a margin between the upper and lower halves 41a, 41b during recording and reproduction of the magnetic disk 26.
It is designed to be formed in between.

As is well known, the center disk 27 of the magnetic disk 26 is attracted to the upper surface of the turntable 29 by a magnetic stick. While the magnetic disk 26 is horizontally rotated within the disk cassette 8 by the motor 28 via the center disk 27, the recording/reproducing head 33 and the pad 32 are moved by a head feeding mechanism (both are (not shown) horizontally and simultaneously in the radial direction of the magnetic disk 26 to perform desired recording and reproduction.

Therefore, in the micro floppy disk cassette mounting device, the disk cassette 8
When the is installed in the cassette installation position, its four corners 8
4 against the elasticity of the upper and lower halves 41a and 41b.
It is necessary to accurately press and fix the book onto the positioning pins 9a and 9b. If the pressing force at the four corners 8a is insufficient or if there is a large variation in the pressing force, the upper and lower halves 41 of the disk cassette 8
The horizontal correction of the upper and lower halves 41a and 41b becomes uncertain, and it becomes impossible to accurately form the gap 42 between the upper and lower halves 41a and 41b. As a result, the magnetic disk 26, which is rotated within the disk cassette 8 during recording and reproduction, is rotated between the upper and lower halves 41a and 41.
This may cause inconveniences such as being accidentally touched by person b. Note that the magnetic disk 26 has upper and lower halves 41a,
If the magnetic disk 26 is rotated while contacting the magnetic disk 41b, significant rotational unevenness will occur in the magnetic disk 26, which not only deteriorates the accuracy of recording and reproduction, but also causes serious damage to the magnetic disk 26, which is a fatal inconvenience. will occur.

However, in this conventional example described above,
The cassette holder 1 is lowered to the cassette mounting position and stopped at that position, and the disk cassette 8 is moved by the front and rear ends 20a' and 20b' of both leaf springs 20a and 20b fixed to the upper surface of the cassette holder 1.
The four corners 8a of are pressed elastically. Therefore, variations in the stopping position of the cassette holder 1 that has been lowered and stopped at the cassette loading position are directly reflected in variations in the pressing force of the four corners 8a of the disk cassette 8, and as a result, the disc cassette 8 The four corners 8a of the upper and lower halves 41a, 41b
It has become impossible to accurately press and fix onto the four positioning pins 9a and 9b against the elasticity of the pins.

In addition, the other end 1b side of the cassette holder 1 supported by the parallel quadruple link mechanism 22 was more likely to sink downward than the one end 1a side due to the load F from above. With the cassette holder 1 raised to the cassette insertion position, the other end 1b of the front end 1c of the cassette holder 1 can be raised to the same height as the one end 1a, as shown in FIG. 5A. Unable to do so, its front end 1c
However, as shown in Figure 5A, it was easy to tilt downward to the left. If the front end 1c of the cassette holder 1 is tilted downward to the left in this way, the front end of the cassette holder 1 will tilt relative to the disk cassette insertion slot (not shown) provided horizontally on the front panel. The left side of the portion 1c is largely shifted downward, and the front end portion 1c is not properly aligned with the disk cassette insertion slot, resulting in a decrease in product value. Further, the parallel quadruple link mechanism 22 requires a large number of parts and a large number of assembly steps, resulting in high costs.

[Purpose of invention]

The present invention was devised in view of the above-mentioned circumstances, and is particularly designed to accurately position the front end of the cassette holder horizontally at a predetermined raised position when the cassette holder is raised to the cassette insertion position. The aim is to provide something that can be regulated.

[Summary of the idea]

In the present invention, the cassette holder is configured to be vertically rotatable in a see-saw shape about the second fulcrum shaft with respect to both left and right ends of the connecting plate, and at least one of the supporting plates is connected to the connecting plate. A pair of front and rear stoppers are integrally provided above the cassette holder at both front and rear ends of the cassette holder, and these stoppers restrict the rotation of the cassette holder about the second fulcrum shaft. When the holder is raised to the cassette insertion position, the front end of the cassette holder is pivoted upward about the second fulcrum shaft in a seesaw shape, and the front end touches the lower surface of the front stopper. This disk cassette mounting device is characterized in that the front end of the cassette holder is horizontally regulated at a predetermined raised position by contacting the cassette holder with the cassette holder.

〔Example〕

Hereinafter, an embodiment of a micro floppy disk cassette mounting device to which the present invention is applied will be described with reference to FIGS. 6 to 13B. Note that the same structural parts as those of the conventional example explained in FIGS. 1 to 5 are given the same reference numerals, and the explanation thereof is omitted.

First, the configuration and operation of this disk cassette mounting device will be outlined with reference to FIGS. 13A and 13B.

Overview of Configuration The disk cassette 8 is inserted and ejected horizontally into the cassette holder 1 in the directions of arrows f and o.

The cassette holder 1 is horizontally arranged between a pair of left and right vertical support plates 2a and 2b.

A connecting plate 3 is horizontally arranged between these support plates 2a and 2b.

The front end positions of both left and right ends 3a and 3b of the connecting plate 3 (ends on the arrow o direction side) are one first fulcrum shaft 4
It is rotatably supported by both support plates 2a and 2b in the directions of arrows c and d.

The rear end positions (ends on the arrow f direction side) of the left and right ends 3a and 3b of the connecting plate 3 are the pair of second fulcrum shafts 5
a and 5b, the cassette holder 1 is pivoted at substantially the center in the front-rear direction (directions of arrows f and o) at both left and right ends of the cassette holder 1 so as to be rotatable in the directions of arrows j and k.

Both front and rear ends of the other support plate 2b (arrows f, o
A pair of front and rear stoppers 58 and 59 are provided above the cassette holder 1 at both ends in the direction.

Four positioning pistons 9a, 9b and a turntable 29 are provided below the cassette holder 1.

Outline of operation Operation for mounting the disk cassette 8 As shown in Fig. 13A, the cassette holder 1
is raised to the cassette insertion position,
The disk cassette 8 is inserted horizontally into the cassette holder 1 from the direction of arrow f.

After the insertion of the disk cassette 8 is completed, the connecting plate 3 is rotated about the first fulcrum shaft 4 from the position shown in FIG. 13A to the position shown in FIG. 3B in the direction of arrow d.

Then, the second fulcrum shafts 5a, 5b of the connecting plate 3 are lowered from the position shown in Fig. 13A to the position shown in Fig. 13B, and the cassette holder 1 is moved from the cassette insertion position shown in Fig. 13A to the cassette mounting position shown in Fig. 13B. be lowered.

Then, as shown in FIG. 13B, four positioning pins 9a, 9 are attached to the four corners of the disk cassette 8.
At the same time, a magnetic disk (not shown) in the disk cassette 8 is mounted horizontally on the turntable 29.

Ejection operation of the disk cassette 8 When the connecting plate 3 is rotated in the direction of arrow c about the first fulcrum shaft 4 from the position shown in FIG. 13B to the position shown in FIG. 13A, the second fulcrum shaft 5a of the connecting plate 3, 5
b is raised from the position shown in Fig. 13B to the position shown in Fig. 13A, and the cassette holder 1 is moved to the position shown in Fig. 13B.
The cassette is raised from the cassette mounting position shown in the figure to the cassette insertion position shown in FIG. 13A.

After the cassette holder 1 has been raised, the disk cassette 8 is ejected from the cassette holder 1 in the direction of the arrow o.

Positioning operation of cassette holder 1 at the cassette insertion position.

As shown in FIG. 13A, the second fulcrum shafts 5a and 5b of the connecting plate 3, which are rotated about the first fulcrum shaft 4 in the direction of arrow c, raise the cassette holder 1 to the cassette insertion position.

At this time, the cassette holder 1 is attached to the second fulcrum shaft 5.
It is rotatable around a and 5b in the directions of arrows j and k.

However, when the cassette holder 1 is raised to the cassette insertion position, the cassette holder 1 comes into contact with the lower portions of the pair of front and rear stoppers 58, 59, and the cassette holder 1 is positioned horizontally.

By horizontally positioning the cassette holder 1, the front end 1c of the cassette holder 1 can be
is correctly aligned with a cassette insertion slot (none of which is shown) provided horizontally on the front panel.

Next, as shown in FIG. 7A, one end 3a of the connecting plate 3 is formed in a substantially V-shape, and an arm 52 extends diagonally backward and downward from the pivot portion 51 of the first fulcrum shaft 4. are integrated. At this time, the so-called arm length l2, which is the center-to-center distance between the first fulcrum shaft 4 and the second fulcrum shaft 5a, 5b of the left and right ends 3a, _3b of the connecting plate 3, is configured to be approximately 10 mm. Approximately 1/ of the same arm length l ₁ shown in Figure 2A of the example
It has been reduced to 3. As a result, the rigidity of the connecting plate 3 is increased, and the left and right ends 3a, 3b of the connecting plate 3 are increased.
Designed to prevent twisting. In addition, the arm length l 3 from the center of the first fulcrum shaft 4 to the tip 52a of the arm 52 is defined as the short arm length l ₂ as described above _.
They are configured almost equally.

Next, as shown in FIG. 7A, the upper edge 5 of the sliding plate 7
3 is integrally provided with a protrusion 54 that vertically projects upward therefrom. This protrusion 54 has a front end surface 54a that extends to the tip 52 of the arm 52.
The front end surface 54a of the protrusion 54 is formed in a vertical plane, and the upper end surface 54b of the protrusion 54 is formed in a horizontal plane. In addition, at the lower part of the pivot portion 53 of the second fulcrum shaft 5a at one end 3a of the connecting plate 3, there is a small protrusion 5 that abuts on the upper end surface 54b of the protrusion 54.
6 are integrally provided.

Next, the parallel quadruple link mechanism 22 of the conventional example described above is not provided at the other end 3b of the connecting plate 3, and the cassette holder 1 has two ends 1a and 1b in the left and right directions, and a front and rear end. The connecting plate 3 has a substantially central position rotatably supported on a pair of left and right second fulcrum shafts 2a, 2b fixed to both left and right ends 3a, 3b of the connecting plate 3. Therefore, as shown in FIG. 12A, the cassette holder 1 is constructed so that it can only pivot freely in the vertical direction (in the directions of arrows j and k) in a see-saw shape about both second fulcrum shafts 5a and 5b. As shown in FIGS. 6, 9A, and 12A, a pair of front and rear upper stoppers 58, 59 are integrally provided above the cassette holder 1 at both front and rear ends of the other support plate 2b. By bringing the front end 1c and rear end 1d of the cassette holder 1 into contact with the lower surfaces of the upper stoppers 58 and 59 from below, the rotation of the cassette holder 1 in the directions of arrows j and k is restricted. It is composed of Furthermore, there is also a front upper stopper 60 at the same height as the front upper stopper 58 above the cassette holder 1 at the front end of one of the support plates 2a.
are integrated. Also, the other support plate 2b
A pair of front and rear lower stoppers 61 and 62 are located below the cassette holder 1 at both front and rear ends of the cassette holder 1 to prevent the cassette holder 1 from dropping (the operation of lowering only the cassette holder 1 without inserting the disk cassette 8). It is installed in one piece.

Next, as shown in FIGS. 6 and 9A, one end 1a of the top plate 19 of the cassette holder 1 has a pair of front and rear positioning pins 9a, 9b arranged on the one end 1a side. A pair of front and rear cassette pressing portions 63a and 63b are integrally provided at opposing positions directly above. Both cassette pressing portions 63a and 63b are constituted by hemispherical convex portions bulged downward from the top plate 19. Note that a leaf spring 20b, which is the same as in the conventional example, is fixed on the other end 1b side of the top plate 19 of the cassette holder 1.

Next, as shown in FIG. 6 and FIG. 7A, the upper edge 5 of the sliding plate 7 is
A lock release plate 65 is located at the upper position of the sliding plate 7.
It is attached so that it can slide freely in the front-back direction in parallel with the Note that the lower edge 66 of this lock release plate 65 is close to the upper edge 53 of the sliding plate 7. Then, the cassette holder 1 is removed from the rear end of this lock release plate 65.
A protruding piece 67 bent into an approximately L shape on the rear end 1d side
is integrally provided, and one of the left and right corner portions 68a, 68b of the rear end portion of the disk cassette 8 inserted into the cassette holder 1 is provided such that one corner portion 68a is brought into contact with the protruding piece 67. It is composed of Also, this lock release plate 65 is formed by a spring 6.
9 to slide forward (in the direction of arrow a in FIG. 7A). And the upper edge 53 of the sliding plate 7
and the lower edge 66 of the lock release plate 65, respectively, are provided with lock portions 70, 71 formed by notches. A lock plate 73 is attached to the side surface of the rear end of one of the support plates 2a via a fulcrum shaft 72 so as to be rotatable in the vertical direction, and a lock pin 74 provided at the front end of the lock plate 73 connects both lock parts 70 71 so that they can be engaged with each other alternately. Note that a small protrusion 75 that is integrally provided on the rear end of the lock plate 73 and projects upward is brought into contact with a small protrusion 76 that is integrally provided on the lower part of the rear end of the lock release plate 65. It is configured.

Next, the operation of the micro floppy disk cassette mounting device constructed as described above will be explained.

First, when installing the disk cassette 8, the sixth
As shown in FIG. 8A, the disk cassette 8
is inserted horizontally into the cassette holder 1 from the direction of arrow f. When the disk cassette 8 is inserted to the position shown by the one-dot chain line in FIG. push. As a result, the lock release plate 65 is pushed by the disk cassette 8 and moved from the position shown in FIG. 7A to the seventh position.
It is slid backward (in the direction of arrow b) against the spring 69 through the position shown in Figure B to the position shown in Figure 7C. Note that when the disk cassette 8 is inserted in the direction of arrow f to the insertion completion position shown by the solid line in FIG. 6, the lock release plate 65 reaches the position shown in FIG. 7C. Then, the other corner portion 68b of the disk cassette 8 comes into contact with the stopper 18 at the rear end of the cassette holder 1 and is stopped.

On the other hand, at this time, when the lock release plate 65 is slid in the direction of arrow b from the position shown in FIG. 7A to the position shown in FIG. As they overlap, small protrusions 7
6 is brought into contact with the small protrusion 75 of the lock plate 73. Then, when the lock release plate 65 continues to slide in the direction of the arrow b, the small protrusion 76 moves the small protrusion 75 into the direction of the arrow b.
7C, the lock plate 73 is rotated in the direction of arrow m as shown in FIG. 7C. Then the lock plate 7
3 locking pin 74 is moved from within locking portion 70 of sliding plate 7 shown in FIGS. 7A and 7B into locking portion 71 of lock release plate 65 shown in FIG. 7C. The lock pin 74 unlocks the sliding plate 7, and in turn, the lock release plate 65 is locked at the position shown in FIG. 7C by the lock pin 74.

In short, the moment the disk cassette 8 is completely inserted into the cassette holder 1, the sliding plate 7
is unlocked. Then, at that moment, the seventh
As shown in Figure C, the sliding plate 7 is slid forward (in the direction of arrow a) by the spring 6. And at this time,
The front end surface 54a of the protrusion 54 of the sliding plate 7 comes into contact with the tip 52a of the arm 52 of the connecting plate 3 and presses it forward (in the direction of arrow a). As a result, the sliding force of the sliding plate 7 forward (in the direction of arrow a) due to the spring 6 is transmitted to the arm 52 via the protrusion 54, and the connecting plate 3 is moved to the first fulcrum shaft by the force of the spring 6. 4, the cassette holder 1 is rotated downward (in the direction of arrow d), and the cassette holder 1 is rotated as shown in FIGS. 8B, 9B, 10B,
The cassette is lowered to the cassette mounting position as shown in FIGS. 11B and 12B.

At this time, as shown in FIG. 7A, the arm 5
Since the arm length _l3 of the connecting plate 3 is configured to be approximately equal to the arm length _l2 of the connecting plate 3, the force of the spring 6 transmitted to the tip 52a of the arm 52 is directly applied to the second fulcrum shafts 5a, 5b. cassette holder 1.
is pressed downward by the force of the spring 6 itself. Moreover, the arm length _l2 of the connecting plate 3 is approximately 1/1 of the arm length _l1 shown in FIG. 2A of the conventional example.
3, the downward pressing force of the cassette holder 1 is much stronger than in the conventional example.

At this time, even when the cassette holder 1 has been completely lowered to the cassette mounting position, the lower surface of the cassette holder 1 does not come into contact with the pair of front and rear lower stoppers 61 and 62, as shown in FIGS. 11B and 12B. First, there is a gap 78 between the lower surface of the cassette holder 1 and these lower stoppers 61 and 62.
79 is retained. However, when the cassette holder 1 is dropped, the lower surface of the cassette holder 1 comes into contact with the lower stoppers 61 and 62.

However, at this time, even when the cassette holder 1 has been completely lowered to the cassette mounting position, the arm 5 is still attached by the protrusion 54 as shown in FIG. 7C.
The state of being pressed forward (in the direction of arrow a) by the force of spring 6 of No. 2 is maintained. Therefore, the cassette holder 1 which has been completely lowered is further pressed downward by the force of the spring 6.

On the other hand, when the cassette holder 1 is lowered to the cassette mounting position, the disk cassette 8 in the cassette holder 1 is horizontally mounted to the cassette mounting position, and the magnetic disks in the disk cassette 8 are 26 is the central disk 2
7 is mounted horizontally on the turntable 29.

At the same time, as shown in FIGS. 9B and 10B, one end 1a of the cassette holder 1 is
A pair of front and rear cassette pressing parts 63a, 6 on the side
3b, and a leaf spring 20b on the other end 1b side.
The four corners 8a of the disk cassette 8 are pressed from above by the front and rear ends 20b', and the four corners 8a are pressed onto the four positioning pins 9a, 9b and fixed. At this time, as shown in FIG. 8B, the center pin 29a of the turntable 29 penetrates through the center of the center disk 27 of the magnetic disk 26 and hits the center portion 8b of the upper half 41a of the disk cassette 8 against elasticity. Push up the upper half 41a and lower half 41b of the disk cassette 8.
is corrected horizontally, and the gap 42 necessary for the rotation of the magnetic disk 26 is created between the upper and lower halves 41a, 4.
1b.

However, at this time, as mentioned above, since the cassette holder 1, which has been completely lowered to the cassette mounting position, is accurately receiving a very strong downward pressing force by the force of the spring 6, the four corners 8a of the disk cassette 8 are It is accurately pressed and fixed onto the four positioning pins 9a and 9b. As a result, the upper and lower half 4
1a and 41b are accurately horizontally corrected, and a gap 42 is accurately formed between the upper and lower halves 41a and 41b. By forming the gap 42 accurately, when the magnetic disk 26 is rotated within the disk cassette 8 during recording and reproducing as described above, the magnetic disk 26 is rotated between the upper and lower halves 4.
Fatal inconveniences such as accidental contact with 1a and 41b and rotation can be prevented.

Moreover, at this time, in particular, as shown in FIG. 10B,
On the non-driving side of the connecting plate 3 opposite to the driving side of the sliding plate 7, it is necessary to take into consideration some twisting of the connecting plate 3. Leaf spring 2 fixed to
Two points of the disk cassette 8 are elastically pressed and fixed onto a pair of front and rear positioning pins 9a, 9b by both front and rear ends 20b' of 0b. A pair of front and rear cassette pressing portions 63a, 63b integrally provided on the top plate 19 of the cassette holder 1 is used to press two points of the disk cassette 8 against a pair of front and rear positioning pins 9a, 63b.
It is rigidly pressed and fixed onto 9b. As a result, on the drive side, the force of the spring 6 is reliably transmitted to two points on the disk cassette 8 via the pair of front and rear cassette pressing parts 63a, 63b.
These two points can be extremely reliably pressed and fixed onto the pair of front and rear positioning pins 9a and 9b, and at the same time, the cassette holder 1 can be positioned parallel to the disk cassette 8 with reference to one end 1a, which is the drive side. Very precisely regulated horizontally. and,
Cassette holder 1 for disk cassette 8
As the parallelism accuracy of the disc cassette 8 becomes extremely high, the pressing force at two points on the disk cassette 8 by both front and rear ends 20b' of the leaf spring 20b on the non-driving side becomes uniform, and these two points are also applied to the pair of front and rear positioning pins 9.
It can be pressed and fixed extremely reliably on a and 9b.

As mentioned above, a pair of front and rear pressing parts for pressing two points on the disk cassette 8 at one end 1a side of the cassette holder 1 are provided integrally on the top plate 19 of the cassette holder 1. When configured with cassette pressing parts 63a and 63b,
Since one of the leaf springs 20a in the conventional example can be omitted, the number of parts and assembly man-hours can be reduced accordingly, and costs can be reduced.

Next, when the disk cassette 8 is ejected, the sliding plate 7 is slid backward (in the direction of arrow b) from the position shown in FIG. 7C to the position shown in FIG. 7A against the spring 6, and the upper end surface of the protrusion 54 is 54a is the small protrusion 5 of the connecting plate 3
Press 6 upward. Then, as shown in FIG. 7A, the connecting plate 3 is rotated upward (in the direction of arrow c) about the first fulcrum shaft 4, and the cassette holder 1 is rotated as shown in FIGS. 8A, 9A, 10A, and 11A. The cassette is raised to the insertion position as shown in FIGS. 12A and 12A.

At this time, when the sliding plate 7 is slid in the direction of arrow b to the position shown in FIG. At that moment, the lock release plate 65
The lock is released, and the lock release plate 65 is slid forward (in the direction of arrow a) by the spring 69, as shown in FIG. 7A. Then, the lock pin 74 of the lock plate 73 is pushed downward by the lock portion 71, and the lock plate 73 is moved as shown by the arrow n in FIG. 7A.
rotated in the direction. Then, the lock pin 74 of the lock plate 73 is moved from the lock part 71 of the lock release plate 65 shown in FIGS. 7C and 7B to the lock part 70 of the sliding plate 7 shown in FIG. 7A. , this time, the sliding plate 7 is replaced with the lock release plate 65.
is locked in the position shown in FIG. 7A by locking pin 74.

In short, the moment the cassette holder 1 is completely raised to the cassette insertion position, the sliding plate 7 is locked and at the same time the lock release plate 65 is unlocked. When the lock release plate 65 is slid by the spring 69 in the direction of arrow a as shown in FIG. 7A, the protrusion 67 of the lock release plate 65 releases the disk One corner portion 68a of the cassette 8 presses forward (in the direction of arrow a). As a result, cassette holder 1
The inner disk cassette 8 is pushed out in the direction of arrow o from the position shown by the solid line in FIG. 6 to the position shown by the dashed line.

However, at this time, as shown in FIG. 12A, when the cassette holder 1 has been completely raised to the cassette insertion position, the arm holder provided at the rear end of the other end 1b of the cassette holder 1 is inserted as described above. A load F from above, consisting of the total load of the weight of the pad support 34 and the biasing force of the spring 37, is acting on the portion 39. The load F forces the cassette holder 1 to pivot upward (in the direction of arrow j) about the second fulcrum shafts 5a and 5b in a seesaw manner. As a result, as shown in FIGS. 11A and 12A, both left and right ends 1a and 1b of the front end 1c of the cassette holder 1 are connected to the pair of left and right upper stoppers 5.
8 and 60 in a horizontal manner, and its front end 1c is horizontally and extremely accurately regulated to a predetermined raised position. The front end 1c of the cassette holder 1 is correctly aligned with a disk cassette insertion slot (not shown) provided horizontally on the front panel.

In addition, as described above, the cassette holder 1 is
Since the parallel four-link mechanism 22 in the conventional example is omitted by making it possible to rotate vertically in a see-saw manner around the fulcrum shafts 5a and 5b, the number of parts and assembly man-hours can be reduced accordingly. As a result, costs can be reduced.

[Application example]

The present invention is not limited to a mounting device for a micro floppy disk cassette, but can be applied to a mounting device for various types of disk cassettes containing various types of recording and/or playback disks.

[Effect of idea]

As described above, in the present invention, the cassette holder is configured to be vertically rotatable in a see-saw manner about the second fulcrum shaft with respect to both left and right ends of the connecting plate, and the cassette holder is raised to the cassette insertion position. At times, the front end of the cassette holder is rotated in a see-saw manner upwards around the second fulcrum shaft by utilizing the load from a pad support or the like acting on the rear end of the cassette holder. By bringing the cassette holder into contact with the lower surface of the front stopper provided at the front end of the support plate, the front end of the cassette holder can be accurately regulated horizontally at a predetermined raised position. Therefore, when the cassette holder is raised to the cassette insertion position, the front end of the cassette holder can be accurately aligned with the disk cassette insertion opening provided horizontally on the front panel. Since the parallel four-link mechanism is not used as in the conventional example, the number of parts and the number of assembly steps can be reduced accordingly, resulting in lower costs.

[Brief explanation of drawings]

1 to 5 show a conventional example of a mounting device for a micro floppy disk cassette, in which FIG. 1 is a plan view, and FIGS. 2A and 2B are a view taken from FIG. Figures 3A and 3B are views from Figure 1--line arrows, Figures 4A and 4B are views from Figure 1--line arrows, and Figures 5A and 5B are Figure 1--line arrow views. This is a perspective view. Figures 6 to 12
Figure B shows a micro floppy disk to which this invention is applied.
FIG. 6 is a plan view, and FIGS. 7A to 7
Fig. C is an enlarged view of Fig. 6 - an enlarged view of the line, Figs. 8A and 8B are an enlarged view of Fig. 6 - an enlarged view of the line; 1
Figures 0A and 10B are enlarged arrow views of Figure 6, Figures 11A and 11B are enlarged views of Figure 6, viewed from XI-XI, and Figures 12A and 12B are Figure 6.
The XII-XII enlarged arrow view, FIGS. 13A and 13B are schematic perspective views illustrating the configuration and operation of the disk cassette mounting device. In addition, in the symbols used in the drawings, 1...cassette holder, 1c...front end of cassette holder, 2a, 2b...support plate, 3...connection plate, 3
a, 3b...Both left and right ends of the connecting plate, 4...First fulcrum shaft, 5a, 5b...Second fulcrum shaft, 6...Spring,
7...Sliding plate, 8...Disk cassette, 34...
... pad support, 37 ... spring, 58 ... front upper stopper, 59 ... rear upper stopper.

Claims (1)

[Scope of utility model registration request] A cassette holder is arranged horizontally between a pair of left and right support plates, and the left and right ends of the connecting plate, which is arranged horizontally between the support plates at the top of the cassette holder, are connected to the support plates with the first fulcrum shaft. The first connection plate is rotatably supported through the connecting plate, and the first
The cassette holder is rotatably supported at a position spaced rearward from the fulcrum shaft at both ends of the cassette holder in the left-right direction and at approximately the center position in the front-back direction via a pair of left and right second fulcrum shafts, and both of the above-mentioned supports are supported. A sliding plate, which is attached to the side surface of one of the supporting plates so as to be slidable in the front-rear direction and is urged to slide forward by a spring, is engaged with one of the left and right ends of the connecting plate. and the sliding plate is slid backward against the spring, thereby rotating the connecting plate upward about the first fulcrum shaft and moving the cassette holder to the cassette insertion position. and after the completion of insertion of the disk cassette into the cassette holder, the sliding plate is slid forward by the spring, thereby rotating the connecting plate downward about the first fulcrum shaft. In the disk cassette mounting device, the cassette holder is lowered from the cassette insertion position to the cassette mounting position by moving the cassette holder in a see-saw shape about the second fulcrum shaft with respect to both left and right ends of the connecting plate. A pair of front and rear stoppers are integrally provided above the cassette holder at both front and rear ends of at least the other of the support plates, and these stoppers allow the cassette holder to be rotated freely in the vertical direction. The cassette holder is configured to restrict rotation about the second fulcrum shaft, and when the cassette holder is raised to the cassette insertion position, the front end of the cassette holder is seesawed upward about the second fulcrum shaft. The front end of the cassette holder is regulated horizontally at a predetermined raised position by biasing the cassette holder to rotate and bringing the front end into contact with the lower surface of the front stopper. A disk cassette mounting device characterized by: