JPS6235168Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cassette mounting mechanism in a recording/reproducing apparatus, and particularly to a disk-shaped recording medium (e.g.
The present invention relates to a cassette mounting mechanism for mounting a disk cassette comprising a magnetic sheet (magnetic sheet) in a flat cassette housing into a recording/reproducing apparatus.

A disk cassette, which consists of a flexible disc-shaped magnetic disk (so-called magnetic sheet) housed in a flat synthetic resin cassette housing, is attached to a recording/reproducing device, and the magnetic disk is rotated at high speed within the cassette housing. There have been conventionally known devices in which video signals, audio signals, digital signals, etc. are recorded and reproduced by moving a magnetic head in the radial direction of the magnetic disk and bringing it into contact with the magnetic surface of the magnetic disk. There is. In this type of conventional recording/reproducing apparatus, the disk cassette is usually held by a cassette holder and moved together with the cassette from a temporary mounting position to a regular mounting position. When the disk cassette is placed in the correct mounting position, the disk cassette is placed on, for example, four cassette receiving pins, and is held in place by a plurality of small protrusions (dowels) provided on the top plate of the cassette holder. The upper surface of the cassette housing is pressed, whereby the lower surface plate of the cassette housing is pressed into engagement with the pin. The reason why the cassette casing is forcibly deformed in this way is because the cassette casing is usually made of synthetic resin and has a flat structure, so it easily deforms plastically. This is because it is necessary to correct the shape to the regular shape. That is, unless such correction is performed, the magnetic disk cannot be rotated smoothly within the flat cassette housing.

However, in the conventional configuration as described above, if there is even a slight variation in the height of the small protrusions provided on the top plate of the cassette holder, the bottom plate of the cassette case cannot be completely pushed until it is crimped and engaged with the pin. This may cause inconveniences such as the cassette case being unable to be moved or being pushed too far and deforming the cassette case more than necessary. In the former case, the disk cassette is not positioned at the correct mounting position, and in the latter case, the magnetic disk may be held between the top and bottom plates of the cassette housing and become unable to rotate, or the disk cassette may not be able to rotate. may be damaged. In reality, it is extremely difficult to precisely shape the height of the small protrusions, and therefore there is a great possibility that the above-mentioned problems will occur.

The present invention has been devised in view of the above-mentioned circumstances, and it is possible to securely press and engage the cassette housing of a disk cassette with the cassette receiving pin and accurately mount the disc cassette in the normal mounting position, and to It is an object of the present invention to provide a recording/reproducing apparatus configured so that a disk-shaped recording medium can rotate smoothly with a small load torque by appropriately correcting the deformation of the disk.

An embodiment of the present invention will be described below with reference to the drawings.

First, as shown in FIG. 1, a recording and reproducing apparatus 1 includes a main body 2 and a cassette mounting device 3 attached to the main body 2. For example, four cassette receiving pins 6a, 6b, 6c, and 6d are implanted in the chassis 5 of this device main body 2, and a flat cassette receiving pin 6a, 6b, 6c, and 6d is installed in the approximate center of a square area surrounded by these pins 6a to 6d. A brushless motor 7 is provided. A rotary table 8 is integrally attached to the motor shaft 7a of the brushless motor 7, and a rotary drive pin 9 and a magnet 10 are respectively provided on the rotary table 8.

Further, a step motor 13 is attached to a vertical piece 12 provided on the chassis 5, and a motor shaft of this step motor 13 is connected to one end of a feed screw 15 by a connecting member 14. The other end of the feed screw 15 is rotatably supported by a vertical piece 16 of the chassis 5.

On the other hand, a guide shaft 17 is arranged in parallel on the chassis 5, and the supporting base 1 is disposed along the guide shaft 17.
8 is guided to arrow A in FIGS. 1 and 3.
and B direction. A magnetic head 20 is attached to the support base 18 via a head attachment plate 19, and a support member 22 supporting the pad 21 is attached to the support member 22 centered on the support shaft 23 as indicated by the arrow C.
It is attached rotatably in the and D directions. This support member 22 is always biased in the direction of arrow C by a tension coil spring 24, but when the cassette is not attached, the pad 21 is rotated in the direction away from the magnetic head 20 (in the direction of arrow D). It is starting to be placed. Further, in this embodiment, the rotational force of the support member 22 due to the biasing force of the above-mentioned tension coil spring 24 can be changed as necessary. That is, as shown in FIGS. 1 and 3, the support member 22 has a support shaft 23.
For example, two sawtooth-like protrusions 26 are integrally molded on the inclined portion 25 which is inclined with respect to
(see figure), this spring 24
It is now possible to adjust the auxiliary power.

Further, the needle-like member 28 is engaged between the threads of the feed screw 15 described above, and is stretched across the pair of opposing portions 29a and 29b of the support base 18, and is held down by a presser plate 30. A feed mechanism 31 is constituted by the step motor 13, the feed screw 15, and the needle-like member 28, and as the step motor 13 rotates for each step, the magnetic head 20 and pad 21 move toward the arrow A. Or it is moved intermittently in the B direction.

On the other hand, as shown in FIG. 2, the cassette mounting device 3 includes a pair of side plates 3 that are screwed and fixed to the chassis 5 of the device main body 2 while facing each other.
3a and 33b. A cassette holder 34 is disposed between these side plates 33a and 33b, and is movable vertically between them, that is, can be raised and lowered. This cassette holder 34 is made by bending a single iron plate, for example, and includes an upper plate portion 35 and side portions 36 having an L-shaped cross section formed on both sides of the upper plate portion 35.
a, 36b. Therefore, both side portions of the cassette holder 34 are substantially U-shaped in cross section, and when the disk cassette 7 is installed, the both side portions are formed into U-shaped cross sections 37a and 37b.
It is designed to be inserted and placed inside. Furthermore, the second
In the figure, 38a and 38b are stopper pieces that prevent the disk cassette 7 from moving in the insertion direction;
39 is a bent piece for preventing incorrect insertion of the disk cassette 7.

The cassette holder 34 also has a pair of fixed shafts 41.
a, 41b are fixed to the rear end portions 4 of the hanging pieces 42a, 42b formed on both sides of the connecting plate 42.
3a, 43b are rotatably attached to these fixed shafts 41a, 41b. The front ends 44a, 44b of the hanging pieces 42a, 42b are
It is rotatably attached to a connecting shaft 45 that spans between the side plates 33a and 33b. Further, a guide roller 47 is provided at the intermediate portion of the above-mentioned hanging piece portion 42a, and this guide roller 47 penetrates a notch portion 46 formed in the side plate 33a and projects outward.

On the other hand, on the upper surface of the upper plate portion 35 of the cassette holder 34, leaf spring members 48a and 48b are provided on both sides thereof.
As is clear from FIGS. 2 and 4, trapezoidal bent portions 49 and 5 are formed at both ends of the pair of leaf spring members 48a and 48b, respectively.
0, 51, and 52 project downward from the lower surface of the upper plate portion 35 of the cassette holder 34.
Incidentally, engagement protrusions 49a to 52a are formed at substantially central portions of these bent portions 49 to 52, respectively. Further, one leaf spring member 48a is provided with a spring force adjustment screw 53, and by turning this screw 53, the pressing force (spring force) by the engagement protrusion 52a can be adjusted. There is.

Further, on the upper surface of the upper plate part 35 of the cassette holder 34, a rotating lever 55 is rotatably supported on a support shaft 56, and a tension coil installed between the lever 55 and the bent piece 57 of the upper plate part 35. Due to the biasing force of the spring 58, the pivoting lever 55 is always biased to rotate about the support shaft 56 in the direction of arrow E in FIG. Further, the rotating lever 55 is provided with a cylindrical cassette engaging portion 59 that hangs down at a right angle.
extends downward from the upper plate portion 35. The rotation of the rotation lever 55 in the direction of arrow E by the tension coil spring 58 is stopped by an inclined portion 60 formed on the upper plate portion 35. Further, the rotating lever 55 has a lock release arm 61 at its tip. Further, a lock arm 63 is attached to a support shaft 62 on the upper plate portion 35 so as to correspond to the rotary lever 55, and a fifth
In the figure, it is configured to be rotatable in the directions of arrows G and H. A step 64 is formed at the tip of the lock arm 63, and a protrusion 65 is integrally formed on the side thereof. As shown in FIG. 5, it is constantly urged to rotate in the direction of arrow G. The lock release arm 61 of the rotary lever 55 described above is configured to be able to rotate while slidingly contacting the lower surface of the lock arm 63. Moreover, the above-mentioned protruding piece 65 penetrates the opening 67 of the side plate 33a and protrudes outward.

On the other hand, an eject operating rod 70 is disposed opposite to the side plate 33a described above, and the eject operating rod 70 is moved to the fifth It is configured to be able to slide in the directions of arrows I and J in the figure. As clearly shown in FIG. 5, the eject operating rod 70 has a pair of parallel parts 75a, 75b extending parallel to the directions of arrows I and J at positions of different heights, and these parallel parts 75a, 7.
A guide hole 75 is formed, and the guide roller 47 described above is inserted into the guide hole 75, and the guide roller 47 is inserted into the guide hole 75. Under such conditions, the eject operating rod 70 is constantly energized in the direction of arrow I (cassette ejection direction) by a tension coil spring 76 installed between it and the side plate 33a.

Further, a lock plate 7 is provided on the rear end side of the side plate 33a.
8 is rotatably attached to the support shaft 79, and the side plate 33
It is constantly biased to rotate in the direction of arrow K in FIG. 5 by a tension coil spring 80 installed between it and a. The rotary lever 55 and the lock release arm 61 are attached to the lock plate 78 by the arrow F.
(See FIG. 3) is provided with a pressed portion 82 that is pressed by the arm 61 when rotated in the direction shown in FIG. is formed. Further, an L-shaped limit plate 87 is rotatably attached to a support shaft 86 fixed to the eject operating rod 70, and a tension coil spring 88 installed between the eject operating rod 70 In FIG. 5, it is always rotated in the direction of arrow M. Note that rotation of the limit plate 87 in the direction of arrow M is prevented by a stopper pin 89 provided on the eject operating rod 70.

As shown in FIGS. 1 and 5, a cassette guide member 91 having a cassette insertion opening 90 is integrally attached to the front end side of the cassette holder 34, and the chassis 5 of the apparatus main body 2
A front panel 92 is attached to the. As shown in FIG. 5, this front panel 92 is provided with an eject button 94, and by pressing and moving this button 94, the pressing portion 70a of the eject operating rod 70 consisting of a bent piece can be pressed. It's getting old. In addition, in FIG. 5, 95 is a compression coil spring for reciprocating the eject button 94.

Further, a rectangular parallelepiped-shaped flat disk cassette 96 is attached to the recording/reproducing apparatus 1 of this embodiment, and a predetermined recording/reproducing operation is performed. The cassette housing 97 of the disk cassette 96 is formed by welding together an upper half 97a and a lower half 97b made of, for example, synthetic resin. A magnetic disk (magnetic sheet) 99 is rotatably housed.
In addition, as shown in FIGS. 1 and 6, the upper half 97
Pad insertion holes 98a and head insertion holes 98b are provided in vertically corresponding positions in the upper and lower halves 97b, respectively, and a recess 104 for detecting incorrect insertion is provided at a predetermined position (a position other than the center) on the front end surface 97c of the cassette housing 97. is provided. On the other hand, Figures 6 and 7
As shown in the figure, a circular opening 99a is provided in the center of the magnetic disk 99, and with the protrusion 100a of the dish-shaped core metal 100 fitted into the opening 98a, the peripheral edge of the opening 98a is bonded on both sides. tape 110
is bonded to the flange 100b of the core bar 100. Further, a motor shaft insertion hole 101 is provided in the center of the bottom surface 100c of the core metal 100, and a rotation drive pin insertion hole 102 is provided at a position offset from this insertion hole 101.

Next, the operation when the disk cassette 96 is attached to the recording/reproducing apparatus 1 configured as described above and recording or reproducing is performed will be explained.

First, the state before the disk cassette 96 is inserted into the cassette holder 34 will be described. In this case, the eject operating rod 70 is pushed in the direction of arrow J as shown in FIG.
3 is engaged with the recess 84 of the lock plate 78. The lock plate 78 is placed in a locked state due to the engagement between the pin 83 and the recess 84, and
Parallel portion 7 of guide hole 75 of eject operating rod 70
Since the guide roller 47 of the cassette holder 34 is disposed at 5a, the cassette holder 34 is placed at a relatively high position, that is, at a temporary mounting position.
At this time, the opening 90 of the cassette guide member 91
and the cassette insertion opening 93 of the front panel 92 are at the same height position.

Under these conditions, as shown in FIG. 5, insert the disk cassette 96 from the recess 104 side into the cassette holder 34 through the cassette insertion opening 93 of the front panel 92 and the opening 90 of the cassette guide member 91. Then, disk cassette 9
The front end surface 97c of the rotary lever 55 engages with the cassette engaging portion 59 of the rotary lever 55 and presses it in the cassette insertion direction. Therefore, when the disk cassette 96 is inserted, the rotary lever 55 moves to the third position about the support shaft 56 against the biasing force of the tension coil spring 58.
In the figure, it is rotated in the direction of arrow F. When the rotary lever 55 rotates, the lock release arm 61 of the rotary lever 55 rotates in the direction of arrow F while slidingly contacting the lower surface of the lock arm 63. Then, the bent piece 39 of the upper plate 35 is relatively inserted into the recess 104 of the disk cassette 96, and the tip of the lock release arm 61 is inserted into the lock plate 78 as shown by the dashed line in FIG. It reaches the pressed part 82 and presses it. As a result, the lock plate 78 is rotated about the support shaft 79 in the direction of arrow L in FIG.
This will result in the disengagement. Note that if the disk cassette 96 is incorrectly inserted into the cassette holder 34, the recess 104 and the bent piece 39 will not correspond and the bent piece 39 will be inserted into the disk cassette 96.
As a result, the rotation of the rotation lever 55 in the direction of arrow F is blocked before the lock release arm 61 reaches the pressing portion 82. Therefore, in this case, the locking state of the ejector operating rod 70 by the lock plate 78 is not released, and the operation of moving from the temporary mounting position to the regular mounting position as described above is not performed.

And the eject operation lever 7 by the lock plate 78
Immediately after the lock state of 0 is released, the front end surface 97c of the disk cassette 96 moves to the stopper piece 38a,
38b. At this time, lock release arm 6
1 corresponds to the stepped portion 64 of the lock arm 63, and this lock arm 63 is rotated in the direction of arrow G in FIG.
1 are in a locked state with each other (Figures 8 and 9).
(see figure).

Further, as described above, the lock plate 78 and the engagement pin 83
When the locked state between the cassette holder 3 and the ejector lever 70 is released, the ejector lever 70 is moved in the direction of arrow I in FIG.
The guide roller 47 is disposed in the parallel portion 75b of the guide hole 75 by the guiding action with the guide roller 47 of No. 4. As a result, the cassette holder 34 and the disk cassette 96 are lowered from the position shown by the dashed line in FIG. 9 (ie, the temporary mounting position) to the position shown by the solid line (ie, the normal mounting position). In this case, since the guide roller 47 is locked by the parallel portion 75b parallel to the chassis 5, when the disk cassette 96 is placed in the normal mounting position, the disk cassette 96 can be held between fingers and moved up and down. Even if the cassette holder 34 is shaken, it will not cause a chucking failure, and the cassette holder 34 can be accurately positioned at its proper mounting position.

Note that before reaching the normal mounting position, the leaf spring members 48 are attached to the four corners of the disk cassette 96.
Since the engaging protrusions 49a to 52a of the cassette holders 34a and 48b are elastically pressed and engaged from above, the disk cassette 96 has these protrusions 49a to 52a and the bottom surfaces 105a and 105b of the cassette holder 34.
(See Figure 2).

When the disk cassette 96 is lowered to the normal mounting position, the disk cassette 96 is placed on the four cassette receiving pins 6a to 6d and flattened as shown in FIGS. 7 and 10. The motor shaft 7a of the brushless motor 7 is inserted into the motor shaft insertion hole 101 of the core metal 100, and its top portion 7b abuts the center portion of the inner surface of the top plate 107 of the cassette housing 97. Therefore, as shown in FIG. 10, the disk cassette 96 is moved upward relative to the cassette holder 34 against the elastic force of the leaf spring members 48a, 48b, and the bottom surfaces 105a, 105
It will be in a floating state from b. In this case, even if the cassette casing 97 is warped and deformed as shown by the dashed line in FIG.
Due to the spring force of 8a and 48b, the cassette housing 9
7 is an arrow P centered on the top 7b of the motor shaft 7a.
and the Q direction. As a result,
The lower plate 108 of the cassette housing is securely pressed onto the cassette receiving pins 6a to 6d disposed directly below the protrusions 49a to 52a of the leaf spring members 48a and 48b.

At the same time, the core bar 100 is attracted onto the rotary table 8 by the magnet 10 as shown in FIG. 7, and the rotary drive pin 9 is inserted into the rotary drive pin insertion hole 102 of the core bar 100. . On the other hand, as the cassette holder 34 is lowered, the pads 21 are inserted into the insertion holes 98a and 98b of the disk cassette 96.
and a magnetic head 20 are inserted, and a portion of the magnetic disk 99 is held between them. The magnetic disk 99 is rotated in a positioned (centered) state by the motor shaft 7a and the rotation drive pin 9, and the magnetic head 2
0 and the pad 21 are intermittently moved in the radial direction of the magnetic disk 99 by the feeding mechanism 31. As a result, concentric recording tracks are formed on the magnetic surface of the magnetic disk 99, or information recorded on the concentric recording tracks is reproduced.

Next, place the disk cassette 96 into the cassette holder 3.
The operation when discharging from 4 will be described below. First, when the eject button 94 is pressed as shown in FIG.
is moved in the direction of arrow J against the auxiliary forces of. Along with this, the cassette holder 34 and the disk cassette 96 are lifted from the normal mounting position to the temporary mounting position by the guiding action of the inclined portion 75c of the guide hole 75 and the guide roller 47. At the same time, the pad support member 22 is rotated in the direction of arrow D in FIG. placed outside.

As is clear from FIG. 11, when the cassette holder 34 and the disk cassette 96 are placed from the normal mounting position to the temporary mounting position (when the guide roller 47 is disposed on the parallel portion 75a), the limit plate 87 is Since the tip 87a does not come into contact with the projection 65 of the lock arm 63, the cassette ejection operation is not performed at this point.

Next, when the eject button 94 is further pressed and the eject operating rod 70 is further moved in the direction of arrow J, the tip 87a of the limit plate 87 contacts and presses the protrusion 65 of the lock arm 63.
Therefore, the lock arm 63 rotates in the direction of arrow H against the biasing force of the tension coil spring 66, as shown in FIG. Even if the lock arm 63 hits the cover of the apparatus body 2 due to its rotation, the impact of the lock arm 63 on the cover is alleviated by the elasticity of the tension coil spring 88.

Then, by rotating the lock arm 63 in the direction of arrow H, the locked state between the lock arm 63 and the rotating lever 55 is released, and accordingly, the rotating lever 55 is moved from the position shown by the dashed line in FIG. Tension coil spring 58 to the position shown by the solid line
It is rotated in the direction of arrow E by the applied force. Accordingly, as the rotation lever 55 rotates, the front end surface 97c of the disk cassette 96 engages with the cassette engaging portion 5.
9 in the cassette ejection direction (in the direction of arrow I), the disk cassette 96 is forcefully ejected from the cassette holder 34 against the spring force of the leaf spring members 48a and 48b due to the pressing force at this time. be done. In this case, the spring force of the bent portion 52 of the leaf spring member 48b, that is, the cassette holding force by the protrusion 52a, is set to be stronger than the other protrusions 49a, 50a, and 51a by adjusting the adjustment screw 53. This prevents the disk cassette 96 from jumping out too much from the cassette holder 34 when the cassette is ejected. Therefore, the cassette holding force by the protrusion 52a acts as an appropriate braking force when the cassette is ejected.

During this ejection operation, the disk cassette 96 protrudes from the cassette holder 34 by an appropriate length and is held in the cassette holder 34 by the pressing force of the leaf spring members 48a and 48b.
Therefore, when taking out the disk cassette 96 from the cassette holder 34, it can be easily pulled out from the cassette holder 34 by grasping the above-mentioned protrusion with fingers.

As described above, in this embodiment, the four cassette receiving pins 6a to 6d, the motor shaft 7a of the flat brushless motor 7, the cassette holder 34,
A cassette mounting mechanism is constituted by leaf spring members 48a and 48b attached to the upper plate portion 35 of the cassette holder 34. According to this cassette mounting mechanism, when the cassette housing 97 of the disk cassette 96 is deformed as shown by the dashed line in FIG. Even if the cassette is manufactured in can be accomplished. As a result, the shape of the magnetic disk storage space formed within the cassette housing 97 becomes a flat rectangular parallelepiped.
The magnetic disk 99 is rotated without coming into contact with the inner surface of the cassette housing 97. Therefore, the load torque acting on the magnetic disk 99 can be greatly reduced, and the magnetic disk 99 can be rotated extremely smoothly.

Furthermore, the lower surface plate 108 of the cassette housing 97 is crimped and engaged with all of the cassette receiving pins 6a to 6d by the spring force of the leaf spring members 48a and 48b, so that the disk cassette 96 can be accurately placed in the correct mounting position. Can be positioned.

Although the present invention has been described above with reference to one embodiment, the present invention is not limited to this embodiment, and various modifications and changes can be made based on the technical idea of the present invention.

For example, in this embodiment, the cassette receiving pins 6a to 6d and the trapezoidal bent portions 49 to 52 of the leaf spring members 48a and 48b are configured to correspond to each other, but the present invention is not limited to this. 49 to 52 to the top plate 10 of the cassette housing 97 at locations near the cassette receiving pins 6a to 6d.
7 may be pressed. Further, the number of cassette receiving pins may be four or more, and the number of leaf spring members can also be changed arbitrarily according to the number of pins.

As described above, in the present invention, a disk-shaped recording medium is rotatably housed in the upper and lower halves made of synthetic resin, and the center hole into which the turntable for rotating the disk-shaped recording medium is inserted is inserted into the lower half. and a cassette holder configured to hold a flat disk cassette having head holes in the upper and lower halves into which recording/reproducing heads are inserted, and to move up and down with the disk cassette between a temporary mounting position and a regular mounting position. , a lifting means for raising and lowering the cassette holder; at least four positioning pins that engage with the four corners of the lower half of the disk cassette to position the disk cassette when the cassette holder is lowered to the normal mounting position; It is provided on the inner surface of the upper plate of the cassette holder facing the four positioning pins, and when the cassette holder is lowered to the normal mounting position, the four corners of the disk cassette are pressed against the four positioning pins via elastic parts. a disk drive motor that drives the rotary table when the cassette holder is lowered to the normal mounting position, and that the top of the center spindle passes through the center hole and engages with the inner surface of the upper half. When the cassette holder is lowered to the normal mounting position, the top of the center spindle engages with the inner surface of the upper half of the disk cassette to determine the height of this inner surface, and the pressing portion The four corners of the disc cassette are pressed onto the positioning pins through the elastic parts to correct the warping of the disc cassette in the normal mounting position, and the disc cassette made of synthetic resin is fixed by pressing through the elastic parts. The cassette mounting mechanism in the recording and reproducing apparatus is configured to prevent damage during correction.

Therefore, according to the cassette mounting mechanism of the present invention, the cassette housing consisting of the upper and lower halves is corrected into a regular shape when the disk cassette is mounted. Therefore, the load acting on the disk-shaped recording medium (for example, the magnetic disk 9) is significantly reduced,
As a result, this recording medium can be rotated extremely smoothly.

Further, since the cassette housing is pressed into engagement with the positioning pin by the elasticity of the pressing portion, the disk cassette can be mounted in the recording/reproducing apparatus with high accuracy.

Furthermore, the cassette housing is not corrected by being given a constant displacement, but is subjected to correction by being given a certain pressure, so that the cassette housing, which has a relatively large warp, is subjected to excessive deformation. As a result, there is no risk of accidentally damaging the cassette housing.

Therefore, unlike the case where a disk cassette is attached to the cassette attachment mechanism with some adjustment,
The present invention provides an optimal mechanism if the cassette loading mechanism is automated.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
1 is an exploded perspective view of the recording/reproducing device, FIG. 2 is an exploded perspective view of the cassette mounting device, FIG. 3 is a plan view of the recording/reproducing device, and FIG. 4 is a front view of the recording/reproducing device.
Fig. 5 is a side view of the recording/reproducing device, Fig. 6 is a rear view of the disk cassette, Fig. 7 is a sectional view showing the state in which the disk cassette is installed in the recording/reproducing device, and Fig. 8 is a view of the disk cassette being attached to the cassette holder. Plan view of the recording/reproducing device showing the state when inserted, No. 9
The figure is a side view of the recording/playback device showing the cassette holder moved from the temporary mounting position to the normal mounting position.
FIG. 10 is a front view schematically showing the mounted state of the disk cassette, FIGS. 11 and 12 are side views of the recording/reproducing apparatus for explaining the ejection operation of the disk cassette, and FIG. 13 is a plan view of the same. It is. In addition, in the symbols used in the drawings, 1...
...recording/reproducing device, 6a, 6b, 6c, 6d...cassette receiving pin, 7...flat brushless motor,
7a... Motor shaft, 7b... Top, 34... Cassette holder, 48a, 48b... Leaf spring member, 4
9, 50, 51, 52... Trapezoidal bent part, 49
a, 50a, 51a, 52a...Engagement protrusion, 7
8... Lock plate, 96... Disc cassette, 9
7...Cassette housing, 99...Magnetic disk, 1
07...upper surface plate, 108...lower surface plate.

Claims (1)

[Scope of Claim for Utility Model Registration] A disk-shaped recording medium is rotatably housed in upper and lower halves made of synthetic resin, and a center hole in which a rotary table for rotationally driving the disk-shaped recording medium is inserted is inserted downward. A cassette holder configured to hold a flat disk cassette having head holes in the upper and lower halves into which recording/reproducing heads are inserted, and to move up and down with the disk cassette between a temporary attachment position and a regular attachment position. a lifting means for raising and lowering the cassette holder; at least four positioning pins that engage with the four corners of the lower half of the disk cassette to position the disk cassette when the cassette holder is lowered to the normal mounting position; It is provided on the inner surface of the upper plate of the cassette holder facing these four positioning pins, and when the cassette holder is lowered to the normal mounting position, the four corners of the disk cassette are directed toward the four positioning pins via elastic parts. a disk drive motor that drives the rotary table when the cassette holder is lowered to the normal mounting position, and that the top of the center spindle passes through the center hole and engages with the inner surface of the upper half; When the cassette holder is lowered to the normal mounting position, the top of the center spindle engages with the inner surface of the upper half of the disk cassette to determine the height of the inner surface, and the pressing portion is The four corners of the disk cassette are pressed onto the positioning pins through the elastic portions to correct the warping of the disk cassette in the normal mounting position, and the disk cassette made of synthetic resin is pressed through the elastic portions. A cassette mounting mechanism for a recording/reproducing device, characterized in that the cassette is prevented from being damaged during correction.