JPH0273560A - Cassette inserting device - Google Patents

Abstract

PURPOSE:To securely hold a cassette after completing its insertion by detaining energizing force of a center core pressing means with a stopper fixed on the side of a main body at the time of completion of a transfer of the cassette to a recording and reproducing position. CONSTITUTION:When the cassette is inserted into a frame body 53, a center core pressing body 54 is abutted in its end part 54c with the stopper 59 and is stopped, while an abutting part 54d is brought under the state of separating from a center core 46. Then, when the positioning is carried out by lowering the frame body 53 and a moving body 56, the pressing body 54 is energized by a spring 55, and the center core 46 is mounted on a spindle. On completion of lowering of the moving body 56, a pad 57 is also lowered down to a prescribed position, and the pressing body 54 is abutted with its end part 54e against the stopper 59 to come to a standstill. Under this condition, the pressing body 54 is given energizing force P1 by the spring 55, but is given reaction force P2 from the stopper 59, and the reaction force P2 is given to the frame body 53 via a supporting shaft 53a to press the upper surface of a cassette case 42, thus holding securely the cassette case 42 on a substrate.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cassette insertion device used, for example, in a video floppy drive device for recording and reproducing signals on a rotating magnetic sheet.

2. Description of the Related Art As a cassette used in a video floppy drive device, a cassette constructed as shown in FIG. 7 is known.

Hereinafter, a description will be given based on the drawings. Reference numeral 1 denotes a cassette case, and a magnetic sheet 2 is housed inside the cassette case. A center core 3 is provided in the center of this magnetic sheet 2, and this center core 3 has a spindle fi/fi on the device main body side.
4 is provided, and a magnetic body (not shown) is provided on the lower surface of the TE center core 3. A magnet 6 is provided near the outer periphery of the spindle y4, and is configured to attract the magnetic material provided on the center core 3. Furthermore, the cassette case 1 has a lower opening 7 into which a magnetic head (not shown) is inserted.
A ninth upper surface opening 8 into which a pad (not shown) for stabilizing the contact between the magnetic head and the magnetic sheet 2 is inserted, and positioning holes 1a and 1b are provided. Further, a dust-proof shutter 9 is provided on the cassette case 1 so as to be able to move freely in order to completely prevent dust from entering through the upper opening 8 and the lower opening 7 when the cassette is handled as a small or single unit.

As a cassette insertion device for a video floppy disk device that uses all the cassettes of the above configuration, for example, those configured as shown in FIGS. 8 and 9 are known. Hereinafter, referring to the drawings, reference numeral 10 denotes a board provided on the main body side of the apparatus, and a cassette positioning pin 11 is provided on this board 10 to engage with the positioning holes 1a and 1b of the cassette to position the cassette. In addition, there are provided a cassette height determining pin 12 which, together with the cassette positioning pin 11, determines the mounting height of the cassette, and the spindle 4 which engages with the center core 3 of the cassette to rotate the magnetic sheet 2t. Also, a magnetic head 14 is provided on the substrate 10, which contacts the magnetic sheet 2 and records or reproduces all signals. 15 is a sliding body, which includes a guide pin 16 on the board 10 and a cassette height determining pin 1.
2 is engaged with the guide hole 15a, and is slidable in the direction of arrow C in FIG. The sliding body 15 has a slit 1
7 and an inclined surface 18 are provided, and a convex portion 15b is provided.
is provided, and a tension spring 19 is applied between this convex portion 15b and a convex portion 10a provided on the substrate IO to bias the sliding body 15 in the direction of arrow C in FIG. 20
is a stopper, this stopper has 20 K holes and 20
The stopper 20 is provided on the board 10 and fitted onto the guide shaft 21, so that the stopper 20 is rotatable as a guide shaft (21t) as a fulcrum, and is rotated in the direction of arrow C in FIG. 8 by means of a coil spring (not shown). is energized by 2
A stopper pin 2 is provided on the stopper 20, and is engaged with a nine-circle arc groove 15c on the sliding body 15.

Also, a semicircular pin 23 is provided at one end of the stopper 20.
is provided. Reference numeral 24 denotes a lever, and the lever 24 is provided with a hole 24a that fits into a guide shaft 25 provided on the board 10, and the lever 8 is connected to a guide shaft 251ft.
It is rotatable as a fulcrum and is biased in the direction of the arrow in FIG. 8 by a coil μ spring (not shown).

Reference numeral 26 indicates nine supporting shafts provided on the lever 24, and a cassette contact loaf 27 is rotatably held on this supporting shaft 26. Reference numeral 28 is a frame body, and the t-th L-shaped portion 2 supports the cassette.
It has 8a t- and a support shaft 29t-,
This support shaft 29 engages with the slit 17 of the sliding body 15.

A positioning body 30 having all holes 303 that engage with the guide shafts 21 and 25 provided on the substrate 10 is attached to the frame body 28 by screws 31. Therefore, the frame 28 is movable only in the directions of arrows E and F in FIG. 28b is a convex portion for fully opening the dustproof shutter 9 of the cassette.

32 is an upper and lower body, which has a support shaft 33t;
A loaf 34 is rotatably held therein. This roller 34 engages with the curved surface 18 of the sliding body 15. 35 is a pad provided on the upper and lower bodies 32. The upper and lower bodies 32 have a positioning body 36 having screws 36a';
7, the upper and lower bodies 32 are movable only in the directions of arrows E and F in FIG.
A tension spring 38 is hung between the upper and lower bodies 32.
is biased in the direction of arrow E in FIG. Reference numeral 10c denotes a height determining boss which is provided on the substrate 10 and is used to determine the height when the upper and lower bodies 32 descend in the direction of arrow E in FIG.

The operation of the cassette insertion device configured as above will be described below.

Now, when inserting the cassette into the t-frame 28, the frame 2
The end of the dustproof shutter 9 of the cassette comes into contact with the protrusion 28b inside the cassette, and as the cassette is further inserted, the dustproof shutter 9 becomes closer. As the cassette is further inserted, the tip of the cassette comes into contact with the cassette abutting roller 27 provided on the lever 24, and a force is applied in the direction of pushing out the cassette due to the urging force in the direction of the eighth (2) arrow. When the cassette is pushed in further by overcoming this force, the tip of the cassette comes into contact with the half-round bottle 23 of the stopper 20.

Here again, a force is applied in the direction of pushing out the cassette due to the biasing force in the direction of arrow C in FIG. The lever 24 is rotated in the opposite direction to the arrow C in FIG. 8, and the stopper 20 is rotated in the opposite direction to the arrow C in FIG. Stopper bottle 22Vi sliding body 15 of stopper 20
The arcuate groove 15c is engaged, but the stopper 20
As it rotates in the direction opposite to the arrow C in FIG. to sphide. At this time, the sliding body 15 starts sliding in the state shown in FIG. 9a, and when the sliding body 15 slides, the stopper 20 is rotated a little more than in the state shown in a, as shown in FIG. 9blc. As a result of this rotation, the half-round bottle 23 comes into contact with the tip 24b of the lever 24, and the lever 24 is further rotated a little in the direction opposite to the arrow in FIG. Become. On the other hand, when the sliding body 15 slides in the direction of arrow C in FIG. 8, the frame 28 descends in the direction of arrow E in FIG. 8 because the support shaft 29 is engaged with the slit 17. The cassette within the frame body 28 descends as the frame body 28 descends, and is positioned by engaging with the cassette positioning bin 11 and cassette height determining bin 12 on the board 10. Once this attachment is completed, the cassette will no longer descend, but the frame 28 will attempt to descend further.
The cassette is pressed, and the cassette is firmly held in that state. When the frame body 28 comes into contact with the cassette and stops descending, the sliding body 15 also stops sliding.

However, the roller 34 of the upper and lower bodies 32 is connected to the inclined surface 1 of the sliding body 15.
8 and is held at that height position, so when the sliding body 15 swivels in the direction of arrow B in FIG. 8, the upper and lower bodies 32 descend in the direction of arrow E in FIG. Slope 1
Since the head of the slit 17 in the direction of the arrow F is larger than the head of the slit 17 in the direction of the arrow E and F, the sliding body 15 fits in the direction of the arrow B in FIG. The amount of descent in the direction of arrow E is greater than the amount of descent of the frame body and the cassette in the direction of arrow E in FIG.
c and is inserted into the upper opening 8 of the cassette. At the time when the sliding body 15 finishes sliding, the loaf 34 of the upper and lower bodies 32 is placed on the inclined surface 1.
8, the height position obtained when the upper and lower bodies 32 come into contact with the height determining post 10c provided on the substrate 10 is higher than the height position obtained when the upper and lower bodies 32 come into contact with the height determining post 10c provided on the substrate 10. 32 will come to rest in a state in which it is in contact with the height determining boss 10c, and the position of the nine pads provided on the upper and lower bodies 32 will be set accurately. At this point, the insertion of the cassette is completely completed and the signal can be recorded or reproduced by rotating the spindle/L/4 to rotate the magnetic sheet 2t and moving the magnetic head 14 to the desired position. It is possible.

Next, when you want to remove the cassette, press the T knob 39 provided on the slider 15 and move the slider 15 to the position indicated by the arrow A in FIG.
Make it move in the direction of . As the sliding body 15 moves in the direction of arrow C in FIG. 8, the frame 28, the cassette within the frame 28, and the upper and lower bodies 32 move in the completely opposite direction to the previous movement. In other words, all three rise, but since the upper and lower bodies 32 are larger than the frame 28 and the cassette in terms of the amount of rise, the T-buds 35 provided on the upper and lower bodies 32 are connected to the cassette) (D from the upper surface opening 8). The puller comes out, and the sliding body 15
At the end of the slide, the pad 35 is completely separated from the cassette. At the point when the sliding body 15 finishes sliding, the stopper pin 22 of the stopper 20 engages with the arcuate groove 15c of the sliding body 15 again, and even if the force pushing the knob 39 is removed, the sliding body 15
5 is held in that state, and the frame 28 and upper and lower bodies 32 are also held in their current positions. On the other hand, as the stopper pin 22 of the stopper 20 engages with the arcuate groove 15c of the sliding body 15, the stopper 20 rotates a little in the direction of arrow C in FIG. 23 and the tip 24b of the lever 24 are disengaged,
The lever 24 tends to rotate in the direction of the arrow in FIG.
Try to push it out in the direction of arrow B in the figure. The other end 24c of the lever 24 is connected to the cassette height determining bin 1 provided on the substrate 10.
The cassette is rotated by the biasing force until it comes into contact with the side surface of the cassette 2, and the cassette is pushed out by a predetermined amount in the direction of arrow C in FIG.

To remove the cassette completely, grasp the rear end of the cassette with your fingers and pull it out.

Problems to be Solved by the Invention However, in the above configuration, the cassette holding force after the insertion of the cassette is completed is due to the force of the tension spring 19 provided on the sliding body 15, so it is difficult to securely hold the cassette. The force of this tension spring 19 must be made strong, but if this is made too strong, you will have to press 39 with your finger with a strong force when taking out the cassette, making it difficult to operate. There is a problem with storing it away.

The present invention is intended to solve all of these problems, and aims to provide a complete cassette insertion device that has a simple structure, can securely hold a cassette, and has improved operability when holding and extracting a cassette. It is something.

Determined Means to Solve All Problems In order to solve this problem, the present invention provides a frame body for storing and moving the cassette, and a center frame provided on the frame body until a predetermined time point for transferring the cassette to a mounting position. The center core pressing means is configured to apply a biasing force in the direction of pressing the core against the spindle and then in the direction of separating the core from the center core.

The movement of the center core pressing means 6i, which is fixed to the apparatus main body side, in the direction of separation from the center core at the time when the cassette installation is completed (M stop) causes the frame body holding the center core pressing means 6i to move away from the center core. It is equipped with a stopper that presses on the side.

With this configuration, when the cassette is housed in the frame and moved to a predetermined position, the center core is pushed toward the spindle on the apparatus main body side by the center core pressing means and is completely inserted into the spindle.

Thereafter, the center core suppressing means moves away from the center core in a direction opposite to the previous one, so that the entire biasing force moves away from the center core, and comes into contact with the stopper to be locked. Since the stopper is fixed to the main body of the device, the biasing force of the center core suppressing means acts on the frame holding the center core pressing means due to the reaction from the stopper, and the frame is pushed toward the main body of the device. As a result, the cassette housed within the frame is pressed against the cassette positioning member provided on the main body of the apparatus and is securely held.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings.

In FIGS. 1 to 6, reference numeral 41 denotes a nine board installed on the main body side of the apparatus, and a cassette set on this board 41 in the case 42 of the 1cU cassette engages with positioning holes 42a and 42b to position the cassette. Positioning bins 43 and 44 are provided, and this cassette positioning bin 4
3.44 and a cassette height determining pin 45 which determines the installation height of the cassette; a spindle which engages with the center core of the cassette and rotates the magnetic sheet 47t/1/
48 are provided. A magnet 49 is provided near the outer periphery of the spindle 48 and attracts the magnetic material provided in the center core 46. Further, the substrate 41 is provided with a magnetic head 50 that comes into contact with the magnetic sheet 47 and records or reproduces signals.

51 A guide plate 52 is fixed to both sides of the board 41 with screws, 53 is a frame for storing the cassette, and 54 is a CC provided on the frame 53 and rotatable around a support shaft 53a'. The holding t-center core pressing body 55 is a spring whose one end is provided on the center core pressing body 54 and engages with the t-bin 54aK, and the other end engages with a t-bin 53b provided on the frame assembly. 56 is a moving body, 57 is a pad provided on this moving body 56, 58 is a sliding body, 59 is a stopper, and 6. b.

This stopper 59 has four mounting holes 59a in some corners.
The mounting holes 59a are aligned with the screw holes 51a and 52a of the guide plates 51 and 52 and screwed. This stopper 59VC is provided with two shafts facing downward, and this shaft 59b is provided on the sliding body 58.
The sleeve 58a engages with the sleeve 58a and serves as a guide in the horizontal direction when the sliding body 58 slides. Further, three shafts 58b are horizontally protruded from the sliding body 58, and one shaft 58b among them is
8b is set in the guide plate 51 and engaged with the nine slits 51b, and the two shafts 58b are respectively set in the guide plate 52 and engaged with the nine slits 52b and 52c, so that when the sliding body 58 slides. It is guided so that the top and bottom do not touch each other. A lever 6 is provided on the T support shaft 59c provided on the stopper 59.
0 is rotatably held and biased clockwise by a tension spring 61. A loaf 62 is provided at the tip of this lever 0, and is provided on the sliding body 58 and engages with an arc-shaped end surface 58c and a linear end surface 58d, and engages with the arc-shaped end surface 58c. When the slider 58 is closed, the slider 58 is prevented from moving in the direction indicated by the arrow in FIG. A cassette pressing body 63 is rotatably held on a support shaft 59d provided on the stopper 59, is urged counterclockwise by a tension spring 61, and one end is provided on the stopper 59 and is locked. It is in contact with the bottle 59e. A roller 64 and a shaft 63a that come into contact with the end surface of the cassette case 42 are provided at the tip of the cassette extrusion body 63, so that the loaf 64 is pushed by the end surface of the cassette case 42 and the cassette extrusion body 6
When the lever 3 rotates clockwise, the shaft i engages with convex portions 60a and 6ob formed at one end of the lever 60. Ninety-three shafts 53c are horizontally protruded from the front raising frame body 53 and are provided with a sliding body 581C and three grooves 58e.
At the same time, one of the shafts 53c is installed in the guide plate 51 and engaged with the T-slit 51c, and the remaining two shafts 53c are installed in the guide plate 52 respectively.
52d and 52e, the frame body 53 moves up and down according to the sliding movement of the sliding body 58 by the vertical head difference of the groove 58e. horizontally protruding between the movable bodies t
The three shafts 56a engage with three inclined end surfaces 58f provided on the sliding body 58, and one of the shafts 56
a is provided on the guide plate 51 and t slit 51dlCI is fitted,
The shaft 56a of the second tree to be felled is inserted into the slit 5 provided in the guide plate 52.
2f, 52g Ic is engaged, and the nine spring hooks 56b are provided at three locations on the movable body 56, and the nine spring hooks 56b are respectively connected to the hollow holes 51e and 51f of the guide plate 51 and the hollow hole 52 of the guide plate 52.
Tension springs 65, 66, and 67 are protruded outwardly from the guide plate 51 and extend between the spring hooks 51g and 51h provided on the guide plate 51 and the spring hooks (not shown) provided on the guide plate 52. The movable body 56 is biased downward by t-, and the movable body 56 moves up and down according to the sliding of the sliding body 58 by the vertical head difference of the inclined end surface 58f. 56 in the direction indicated by the arrow in FIG. The convex portion 54b provided on the center core pressing body 54 is configured such that seven portions of the movable body 56 come into contact with it when the movable body 56 descends. Reference numeral 53d designates a convex portion provided within the frame 53, and is configured such that the end of the dustproof shutter 68 of the cassette can come into contact with it.

Next, the operation of the cassette insertion device having the above configuration will be explained.

Now, as the cassette (cassette) 1 is inserted into the frame 53, the end of the dustproof shutter 68 of the cassette hits the protrusion 53d inside the frame 53 and opens the dustproof shutter 68, and the cassette pusher is inserted into the end face of the cassette case 42. The roller 64 of 63 comes into contact with the cassette pusher 63, and the cassette pusher 63 is rotated clockwise.
3a comes into contact with the convex portion 60a of the lever 60, causing the lever 60 to rotate counterclockwise.

Before this rotation, the roller 62 of the lever 60 engages with the arcuate end surface 58c of the sliding body 58 to stop the sliding body 58 from moving. The axis 56a of the body 56 is connected to the inclined end surface 58f of the sliding body 58.
and is engaged above the groove 58e, and the frame 53
The movable body 56 is located above, and is in the state shown in FIG. The center core pressing body 54 has an end portion 54
c abuts against the stopper 59 and stops, and the abutting portion 54d that abuts and pushes the center core 46 presses the center core 4.
6 and is in a friendly state, so that it does not become an evil RIC when the cassette is inserted into the frame 53. lever 60
rotates counterclockwise and the loaf 62 passes over the arcuate end face 58c of the sliding body, the locking of the sliding body 58 is released, and the sliding body 58 moves in the direction of arrow A in FIG. 1 due to the biasing force. Begin to. At this time, the roller 62 of the lever 60 comes into contact with the linear end surface 58d of the sliding body 58,
The lever 60 is locked when rotated clockwise by the biasing force.

te, the shaft 63a of the cassette pusher 63 engages with the convex portion 60b Ic of the lever 60, and the rotation in the cassette push-out direction (counterclockwise) due to the biasing force of the cassette pusher 63 is stopped. In the process of lowering and installing the cassette, the end face of the cassette case 42 is not forced to be pushed, and installation can be carried out smoothly. As the sliding body 58 moves in the direction of arrow A in FIG.
are provided on the substrate 41 and positioned by T-bins 43-45. At this time, the state shown in Figure 3 is reached,
The center core pressing body 54 is biased clockwise by a spring 55, and the contact portion 54d of the center core pressing body 54 contacts and presses the upper surface of the center core 46, causing the center core 46Vi and spindle Iv48 will be completely installed. Furthermore, the sliding body 58 is moved by the arrow A in FIG.
As the moving body 56 moves in the direction, the moving body 56 further descends, and a part of the moving body 56 contacts and pushes the convex portion 54b of the center core pressing body 54, causing the center core pressing body 54 to rotate counterclockwise. I'll let you do it. When the state shown in Figure 4 is reached,
The force exerted by the spring 55 on the center core pressing body 54 in the clockwise direction becomes zero, and when the movable body 56 further descends and further rotates the center core pressing body 54 in the counterclockwise direction, the spring 55 forces the center core The pressing body 8 is now biased counterclockwise, and the center core pressing body 5
4 rotates counterclockwise. When the movement of the sliding body 58 is completed and the descent of the movable body 56 is also completed, the state shown in FIG. End portion 54
e comes to rest in contact with the stopper 59. In the state shown in FIG. 5, the center core pressing body 54 receives a biasing force PL from the spring 55, but is stopped by the stopper 59 and receives a reaction force P from the stopper 59.
2, and this force is applied to the frame 53 via the support shaft 53a'. Therefore, the frame 53 tries to descend further, pushing the top surface of the cassette case 42 and the bottle 4 on the board 41 one by one.
Press it to 3-45 and hold it securely. When the spindle/I/48 is rotated, the center core 46tf continues to be attracted by the magnet 49, so the center core 46 and magnetic sheet 47 rotate together with the spindle/L/48, and the magnetic head 50 Habad57
By arranging it at a predetermined position, it is possible to maintain good contact with the magnetic sheet 47, thereby making it possible to record or reproduce signals.

Next, when you want to take out the cassette, move the sliding body 58 in the direction of arrow B in Figure 1, and the moving body 56 and frame 5
3, the movement is completely opposite to the previous one, first the moving body 56 starts to rise, then the frame body 53 goes up! +Start. As the frame body 53 rises, the center core pressing body 8 rotates clockwise as the end portion 54e is pressed by the stopper 59. When the state shown in FIG. 6 is reached, the biasing force in the counterclockwise direction by the spring 55 becomes zero.
When the frame body 53 further rises and the center core pressing body 54 is further rotated clockwise, the center core suppressing body 54 is now biased clockwise by the spring 55 and rotates clockwise. do. At this time, even though the contact portion 54d of the center core pressing body 54 contacts the center core 46, the center core 46 is at a position moved by a predetermined amount from the spindle, so the spindle/L/48 rotates due to inertia etc. There is no problem if you continue to do so.

When the movement of the sliding body 58 is completed and the lifting of the moving body 56 and the frame body 53 is completed, the state shown in FIG. 2 is reached,
The center core pressing body 54 has a stopper 59 at the end 54c.
The contact portion 54d of the center core pressing body 54 is spaced apart from the center core 46, the magnetic head 50 and the pad 57 are also spaced apart from the cassette case 42, and the cassette frame 53 It is possible to move within. When the movement of the sliding body 58 is completed, the roller 62 of the lever 60 engages with the arc-shaped end surface 58c of the sliding body 58, so the lever 60 is rotated clockwise by a predetermined amount by the biasing force, and the lever 60 The locking of the cassette pusher body 63 by the convex portion 60b is released, and the cassette pusher body 63 is moved by the urging force to the locking pin 5 of which one end is the stopper 59.
The roller 64 at the tip pushes the end face of the cassette case 42 and pushes the cassette out of the frame 53 by a predetermined amount. and,
To completely remove the cassette, grasp the edge of the cassette that has been pushed out with your fingers and pull it out. The force required to move the sliding body 58 when taking out the cassette is a weak force since there is no need to provide the sliding body 58 with a tension spring whose load increases as the sliding body 58 is moved as in the conventional case. It's over.

Effects of the Invention As described above, according to the present invention, it is possible to securely hold a cassette with a simple structure, and the driving force to the sliding body when taking out the cassette is also small, which has great practical effects.

[Brief explanation of the drawing]

Figures 1 to 6 show one embodiment of the present invention.
The figures are exploded perspective views of main parts of the cassette insertion device, Figures 2 to 6.
The figure is an explanatory diagram of the operation, Figures 7 to 9 show the conventional example, and Figure 7 shows the conventional example.
The figure is a perspective view of the cassette, FIG. 8 is an exploded perspective view of essential parts of the cassette insertion device, and FIG. 42b・
...Positioning hole, 43.44...Cassette positioning bin, 45...Cassette height determining pin, 46...Center core, 47...Magnetic sheet, 48...Spindle, 49...・Magnet, 50...Magnetic head, 51
．． 52... Guide plate, 53... Frame body, 53a...
Support shaft, 54... Center core pressing body, 55... Spring, 56... Moving body, 57... Pad, 58... Sliding body, 58c, 58d... End face, 59... Stop, < -, 60...Lever, 61...Tension spring, 62...Roller, 63...Cassette extrusion body, 65
~67...Tension spring. Agent Yoshihiro Morimoto Figure d7 --- Seki Ryuki Sheet 3 Figure 7 Figure 4 Figure 6 Figure 8

Claims (1)

[Claims] 1. A first position where the center core of a cassette containing a rotatable magnetic sheet supported by a center core is engaged with a spindle on the apparatus main body side to rotate the magnetic sheet and perform recording or reproduction. and a second position where the cassette can be taken out or inserted, the cassette insertion device includes: a frame body that stores and moves the cassette; and a frame body provided on the frame body. center core pressing means configured to apply a biasing force in a direction that presses the center core against the spindle until a predetermined time point when the center core is transferred to the first position, and then in a direction away from the center core; a stopper that is fixed to the apparatus main body side and that stops the movement of the center core pressing means in the direction of separation from the center core at the time when the transfer to the first position is completed; When the transfer to the position is completed, the stopper locks the urging force of the center core pressing means, and this urging force causes the frame body provided with the center core pressing means to move toward the main body of the apparatus. A cassette insertion device configured to be pressed so that a cassette in a frame is pressed against a cassette positioning member on the device main body side.