JPS63273261A - Cassette loading device - Google Patents

Abstract

PURPOSE:To correctly hold a cassette at the chucking position and to ensure the chucking motion by providing the stopper checking the passing of the cassette through the chucking position on a cassette holding member. CONSTITUTION:A chuck ring 43 for chucking a cassette 10 is fitted via a shaft fulcrum 41 on a sliding member 28, which acts as a cassette holding member as well. And on this member 28 the stoppers 67A, 67B checking the excess immersion by abutting to the tip face of this cassette 10 are provided in the state being pressed and engaged a cassette holding claw 42 to the recessed part 14 of the cassette 10 with a spring 44. These stoppers 67A, 67B are formed by the integral projecting part bent downwards from the sliding member 28 and the structure having no difficulty in drawing the cassette 10 is made by projecting downwards the stoppers 67A, 67B through oblong holes 68A, 68B in the backward and forward directions formed on a cassette holder 27.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cassette loading device for loading a floppy disk cassette, video tape cassette, or the like inserted through an opening into a drive device.

(Prior art) In computers, word processors, audio equipment, etc., floppy disks and magnetic tapes are generally used as recording (recording) and playback media stored in cassette cases, and these devices do not have cassettes attached to heads. A cassette loading device is provided for loading into the opposing loading position.

Generally, this cassette loading device chucks a cassette inserted to a certain depth from an opening with a cassette holding member, further introduces the cassette holding member to the cassette mounting position and locks it, and releases the lock when removing the cassette. The cassette holding member is returned to the ejecting position (the chucking position number is approximately the same), and the cassette is taken out from there.

[Problem that the invention seeks to solve]

Generally, when a cassette is inserted, a chuck link with a cassette holding claw that is biased by a spring force is pushed and moved by an inclined cam surface at the tip of the cassette, and the cassette is inserted to a predetermined depth. At this time, a device is used in which the cassette holding claw is engaged with a recessed portion of the cassette by a spring force.

However, in such a chucking mechanism, the engagement is performed by the pressing force of a spring, so the impact force when inserting the cassette easily makes the positioning of the cassette uncertain, and the cassette ejecting operation may become uncertain. there were.

[Means to solve the problem]

The present invention has been made in view of the problems of the prior art described above, and is a cassette loading device equipped with a chunking mechanism that can correctly hold the cassette in the chuck position and reliably chuck it even if an impact force or the like is applied when inserting the cassette. The purpose is to provide equipment.

The present invention achieves the above object with a cassette loading device in which a cassette holding member provided with a chuck link for chucking the cassette is provided with a stopper for preventing the cassette from passing through the chuck position.

〔Example〕

The present invention will be specifically described below with reference to the drawings.

FIG. 13 is a back (bottom) view of a floppy disk drive set 10 suitable as a cassette to be loaded into a cassette loading device according to the present invention.

In FIG. 13, the upper and lower cassette shells IIA.

There is a floppy disk 1 inside the case formed by llB.
2 is rotatably supported. This floppy 12 has its hub (disk hub) 13 in cases IIA and IIB.
It is pivoted at the center of the

The end surface of the hub 13 is formed of a magnetic material, and the hub 13 is positioned and mounted by adhering the end surface to a magnet support surface of a drive shaft that is pivotally supported by the cassette loading mounting section.

A recess (notch) 14 is formed at both end edges of the lower surface of the cassette 10, with which a cassette holding claw of a chuck link of a chucking means, which will be described later, engages.

Further, positioning pins provided at the base of the cassette mounting section engage with the lower surface of the cassette 10, and positioning holes 15A, 15B, 15 for accurately determining the position of the cassette are engaged.
C, 15D are provided.

The lower cassette shell IIB is formed with an opening 16 for exposing the head-facing portion (usually provided on two upper and lower surfaces) of the disk 12, and the opening 16 allows a sliding shutter 17 to move left and right. It is opened and closed by This shutter 17 is biased in the closing direction by a torsion coil spring or the like, and is opened in conjunction with the pulling operation when the cassette is attached. The shutter 17 is formed with a recess (or notch) 18 into which an engaging protrusion of a shutter opener, which will be described later, engages.

In addition, in FIG. 13, the shutter 17 is located between the closed position and the open position.

The left side of the tip of the cassette IO (right side in the back view of Figure 13)
has an inclined surface (slide surface) 19 to prevent incorrect insertion.
is formed.

In addition, in order to prevent rotational vibration of the disk 12, a stabilizer 20 is attached to the back surface of the illustrated cassette 10, which applies a predetermined pressure to the disk 12 by being abutted by springs or the like from above and below at the mounting position. There is.

Further, a write protector 21 for preventing accidental erasure is provided at the corner of the cassette 100.

FIG. 1 is a plan view of the main parts of the cassette loading device according to the present invention, with the upper half showing the cassette loading door open and the lower half showing the door closed.

Figure 2 is a left side composition with a part removed from the line n-n when the door is opened in Figure 1, and Figure 3 is the same line as Figure 2 - -
This is the left side view from ■ with some of the other parts removed.

Figure 4 is a partially removed right side view taken from line IV-IV when the door is closed in Figure 1, and Figure 5 is the same line as Figure 4 -
It is a right side view with the other part removed as seen from ■.

FIG. 6 is a partially omitted cross-sectional view when the door is opened, taken along line vx-vx in FIG. 1.

In Figures 1 to 6, the cassette loading device is a left side plate 2 fixed to the machine frame of the drive device, etc.
5 and a right side plate 26, a cassette holder 27 guided up and down by the left and right side plates 25 and 26, and a slide member (
A cassette holding member) 28 is supported.

As shown in FIG. 6, the cassette holder 27 has a cross-sectional shape with guide portions 31A and 31B on the left and right lower sides so as to accommodate and hold the cassette 10 in a slidable manner in the front and back directions, and the slide member 28 is attached to the cassette holder 27. It is supported so as to be slidable in the front-rear direction.

First, the cassette holder has engaging pins 3 provided on the left and right sides.
2A and 32B are fitted into vertical guide grooves 33A and 33B formed in the left and right side plates 25 and 26, so that they can be moved up and down.

The slide member 28 has longitudinal long grooves (Kai F?M) 34A, 34B, and 34C formed at three locations, and engagement pins 35A, 35B implanted in the cassette holder 27.
, 35C, it is slidably engaged with the cassette holder 27 in the front-back direction.

Furthermore, this slide member 28 has engaging pins 36A and 36B provided on both sides of the slide member 28 on the left and right side plates 25.
26, that is, guide grooves 37A and 37B having a horizontal portion and a vertical portion.

A chuck link 43 having a cassette holding claw 42 that engages with the chucking recess 14 of an inserted cassette is pivotally supported on a pivot point 41 provided on the slide member 28 . This chuck link 43 is the slide member 2
8 is biased counterclockwise in FIG.

When the cassette IO is inserted and the inclined surface of the cassette collides with the cassette holding claw 42 of the chuck link 43, the cassette holding claw 42 is pushed outward, the chuck link 43 rotates clockwise, and the cassette holding claw 42 rides on the side of the cassette 10 and begins to slide.

When the cassette 10 is pushed further and reaches the chucking position or ejecting position, the cassette holding claw 42 is pushed into the recess 14 of the cassette 10 by the spring force, and the cassette 10 is moved to the chuck link 4 biased by the spring 44.
It is chucked by the pressing engagement of No. 3 and held so as to move in the front and rear direction together with the slide member 2B.

If the cassette 10 is incorrectly inserted and the inclined surface 19 is not on the chuck link 43 side, the cassette 10 will collide with the chuck link 43 and be stopped, and cannot be inserted into the discharge position.

FIG. 9 is a front view of the cassette loading device.

A front panel 46 having an opening 45 for inserting a cassette is provided on the front of the cassette loading device, and the opening 45 is opened and closed by a door 48 that rotates around a pivot point 47 .

On the other hand, left and right loading plates 50 and 51 are provided on both sides of the cassette loading device, that is, on the left and right side plates 25 and 26, and are moved in the front and rear directions according to the opening and closing operations of the door 48.

That is, the pivot shafts 52A provided on the left and right sides of the door 48
, 52B have left and right door links 53A, 53, respectively.
One end of B is rotatably connected, and these door links 5
The other ends of 3A and 53B are rotatably connected to the front ends of left and right loading plates 50 and 51 via pivots 54A and 54B, respectively.

The left and right loading plates 50, 51 each have two guide grooves 55A, 55B and 56A, 56B.
is formed, and each guide groove has an engaging pin 5? implanted in the left and right side plates (fixed) 25 and 26. A, 57B,
58A and 58B are slidably engaged.

In addition, each guide groove 55A, 55B and 56A, 56B
are formed symmetrically, and these guide grooves are formed horizontally to guide each loading plate 50, 51 in the horizontal direction, but in the illustrated example, each guide groove has an inclined groove at the end. Engagement cam parts 60A, 60B, 61
A, 61 is formed. - These engaging cam parts 60A, 60B and 61A, 61
B indicates the left and right engaging pins 32 of the cassette holder 27.
A, 32B and the left and right retaining pins 36A, 36B of the slide member 28 are slidably engaged, and the cassette holder 27 is guided up and down by the back and forth movement of the left and right loading plates 50 and 510, and the slide member 2
This is for guiding 8 back and forth and up and down.

The left and right loading plates 50 and 51 are constantly urged in the return direction (discharge direction) by tension springs 62A and 62B stretched between the left and right side plates 25 and 26.

In this way, the slide member 28 that has chucked the cassette 10 moves in conjunction with the movement of the door 48 from the open position shown in FIGS. 2 and 3 to the closed position shown in FIGS. 4 and 5, that is, the movement of closing the door 48. When the slide member 28 and the cassette holder 27 are pulled inward by a distance H (FIG. 2), both the slide member 28 and the cassette holder 27 are moved downward by a height V together with the cassette 10.

The movement at this time is the cam engaging portions 60A, 61A, 60B formed on the loading plate 50.51.

By mechanically guiding the engagement pins 32A, 36A, 32B, and 36B at 61B, it is ensured that the movement of closing the door 48 is performed by an amount corresponding to the movement.

That is, the above-mentioned cassette loading movement is not performed with momentum by the elastic force of a spring, but is performed completely without impact.

FIG. 8 is a diagram showing the top surface of the cassette holder 27. As shown in FIG.

In FIG. 8, on the left and right sides of the upper surface of the cassette holder 27 are plate springs 64A and 64B for pressing the cassette IO.
are attached, and both ends of these leaf springs are inserted into openings 65A, 66A, 65 formed in the cassette holder 27.
B, protrudes downward from 66B, and the cassette holder 27
The upper surface of the cassette IO inserted therein is pressed against the upper surface of the cassette IO, and the cassette 1° is pressed against the guide portions 31A and 31B (FIG. 6) to hold it without wobbling.

As mentioned above, the chuck link 43 for chucking the cassette 10 is attached to the slide member 28 via the pivot point 41, and the slide member also functions as a cassette holding member.

The slide member 28 is in a state where the cassette holding claw 42 (Fig. 1) is pressed into engagement with the recess 14 (Fig. 13) of the cassette lO by a spring 44, that is, the cassette lO
Stoppers 67A, 6 that come into contact with the front end surface of the cassette 10 to prevent excessive penetration when the cassette 10 is chucked.
7B (Fig. 1, Fig. 6) is provided. This stopper 67A.

67B is formed by an integral protrusion bent downward from the slide member 28, and in the illustrated example, by protruding the stopper 67A167B downward through long holes 68A and 68B formed in the cassette holder 27 in the longitudinal direction. The structure is such that there is no hindrance to the cassette 10 retracting operation.

FIG. 1θ is a partial plan view showing the mechanism for opening and closing the shutter 17 (FIG. 13) that closes the opening 16 of the cassette 10 and its operation.

1 and 10, the guide groove 34C of the long hole in the longitudinal direction formed in the slide member 28 is shown in FIG.
is engaged with the engagement pin 35C implanted in the cassette holder 27, and the slide member 28 is engaged with the engagement pin 35C implanted in the cassette holder 27
It moves relative to the front and rear direction.

A shutter opener 71 is rotatably supported on the slide member 28 via a pivot point 70. A shutter 17 for opening and closing the opening 16 of the chucked cassette 10 is provided at the tip of the shutter opener 71.
An engaging protrusion 72 that engages with the recess 18 is integrally formed.

Further, the shutter opener 71 is formed with a cam groove 73 that engages with an engagement pin 35C implanted in the cassette holder 27.

When the slide member 28 that has chucked the cassette 10 moves backward with respect to the cassette holder 27, that is, when the cassette 10 is pulled in, the cam groove 73 engages the engaging protrusion 72 of the shutter opener 71 in accordance with the movement. It has a shape that allows it to be moved relative to the slide member 28 (and therefore relative to the cassette 10) in the shutter opening direction (from left to right).

Furthermore, an opening lower portion 4 is formed on the upper surface of the cassette holder 27 to prevent movement of the engaging protrusion 72 of the shutter opener 71 in the shutter opening/closing direction.

The solid line and chain line in FIG. 10 indicate the chucking position (discharging position), and the two-dot chain line indicates the mounting position where the cassette IO is pulled in.

In this way, a cam hand &35C171, 73 is provided to change the movement of the chucked cassette lO into a movement in the shutter opening/closing direction (left to right) of the cassette, and the recess 18 of the shutter 17 is provided in the shutter opening/closing direction moving portion of the cam means. A mechanism is constructed in which an engaging claw portion (engaging protrusion) 72 is provided, and the shutter 17 is moved to open and close the opening 16 in conjunction with the pushing (retraction) and ejecting (ejection) of the cassette 10.

FIG. 7 shows the state in which the cassette 10 is attached, that is, the state in which it is loaded.

In FIG. 1, when the cassette 10 is locked in the mounting position with the shutter 17 open, the recording/reproducing head 100 moves through the opening 16 of the cassette 10 (FIGS. 10 and 13).
is guided into the cassette, and information is recorded (written) while moving linearly (head feeding) in the front and back direction from the opening.
Or it operates to read.

4 and 7, the base 75 has a pin 7 for positioning the cassette 10 (cases IIA, IIB).
6A,? A rotary boss 77 for driving and positioning (height, plane position, parallelism) 6B, 10IA, 101B and the floppy disk 12 is provided.

In the illustrated example, the positioning of the cassette 10 in the pins 76A, 7
6B, 10IA, and 10IB.

When the cassette 10 is pushed in and lowered by the movement of the loading plate 50, 51 mentioned above, the recesses 15A, 15B, 15C, 15D (FIG. 13) of the cassette 10 first fit into the pins 76A, 76B, 10IA, 10IB. At the same time, the hub 13 (FIG. 13) of the disk 12 comes into contact with the rotary boss 77, and the cassette 10 is positioned.

In particular, it is necessary to accurately position the disk 12 for writing and reproducing in relation to the head (not shown), and for this reason, for example, the rotary boss 77 and the hub 13 are of a magnetic attraction type, and the rotational position is adjusted to improve parallelism, centering, and rotational position. It is preferable to have a fitting structure that can accurately regulate the

The cassette holder 27 and the slide member 28 are connected to the engaging cam portions 60A and 60B of the loading plate 50.51.
Then, the cassette 10 is pulled slightly further downward by the guide portions 31A, 61B, and gaps 78A, 78B are created between the guide portions 31A, 31B and the cassette 10.

Further, in the attached state, the cassette 10 is attached to the leaf spring 6.
4A, 64B, and therefore, the cassette 10 is elastically positioned between the leaf springs 64A, 64B and the pins 76A, 76B with a predetermined holding force.

In Figures 1 and 4, the cassette lO is locked in the loading position (Figure 7) between the right side plate 26 and the right loading plate 51 by closing the door 4B, and the door is pushed again. The movement of time releases the cassette 10 and releases the loading plate 50, 51 return spring 62A.
, 62B is provided to return (eject) the cassette 10 to the discharge position.

11 and 12 are a front view and a sectional view (line A-A, line B-
B).

1, 4, 11, and 12, a lock link 81 is pivotally supported on the right side plate 26, and the right loading plate 51 cooperates with the lock link 81 to lock and release. An engagement pin 82 is implanted.

11 and 12, the lock link 8
1 is attached to a pin 83 implanted in the right side plate 26 so as to be rotatable and tiltable or displaceable in the axial direction. In the illustrated example, the lock link 81 is connected to the pin 83 by a coil spring layer 84 fitted to the pin 83.
3 is biased toward the tip side.

The lock link 81 is biased by a spring 85 in the direction shown to the left in FIG. in the corresponding initial rotational position.

As shown in FIGS. 11 and 12, the lock link 8
1 is formed of a plate member, and the lock link 81 includes a cam portion 88 that is first contacted by the engagement pin 82 of the loading plate 51 that moves in parallel in the direction of arrow B, and is pressed and slid against the spring 85; a guide groove 89; a locking portion 90 in which the lock link 81 and pin 82 are in a stable locked state;
A release start part 91 into which the pin 82 enters when pressed twice, and a release guide part 92 that is inclined in the direction shown in FIG. 12 and is formed so that the pin 82 can ride over it.

The operation of this lock and release mechanism 80 is as follows.

When the door 48 starts to close after the cassette IO is chucked, the loading plate 51 and the engagement pin 82 implanted therein move in parallel in the direction of arrow B.

When the constant strain cassette 10 is pushed in, the engagement pin 82 collides with the cam portion 88 of the lock link 81, and the upward force (as shown in FIG. 11) at that time causes the lock link 81 to release the spring 8.
5 in the clockwise direction (in FIG. 11).

When the engagement pin 82 further advances and passes through the cam portion 88 and reaches the entrance of the guide groove 89, the lock link 81 is moved by the spring 8.
The engagement pin 82 is rotated counterclockwise by the spring force of 5, and the engagement pin 82 is latched at the lock position 90. At this point, the closing operation of the door 48 is stopped.

In this position, it is in a stable locked state and the return spring 62
The loading plate 51, which is biased by the spring toward the entrance (leftward in FIG. 11) at B (FIG. 4), and the spring 85 move the first
In FIG. 1, lock links 81 that are biased in the counterclockwise direction are stably engaged and held together.

This locked position corresponds to the cassette mounting position shown in FIG.

Next, the operation when taking out the cassette 10 will be explained.

To take out the cassette 10, it is only necessary to push the closed door 48 further (press it twice).

In FIGS. 11 and 12, closed door 48
(Fig. 4), the loading brake 51 is pushed a certain distance back against the spring 62B, and the locking pin 82
When the engagement pin 82 comes out of the lock position 90 and moves slightly toward the odor, the lock link 81
is slightly rotated counterclockwise by the spring 85, and the engagement pin 82 comes to the release starting portion 91.

When the engagement pin 82 reaches the release start portion 91, the spring 62
The engagement pin 82 of the loading plate 51, which is biased in the entrance direction (door 48 opening direction) at B, comes into contact with the release guide portion 92.

However, as shown in FIG. 12(A), this release guide portion 92 is inclined to a higher position than the contact portion of the engagement pin 82, and moreover, the lock link 81 itself is
As shown by the middle two-dot chain line, the support pin 81 is held so that it can be displaced in the axial direction, so the retaining pin 82 can easily overcome the release guide part 92 by the spring force of the spring 62B. The loading plates 50, 51 are immediately returned to the ejecting position (the ejecting position which is substantially the same as the chucking position when the cassette 10 is inserted) by the spring force of the left and right return springs 62A and 62T3.

That is, by simply pushing the door 48, the cassette 10 that has been locked in the loading position can be released and immediately returned to the ejecting position where it can be taken out.

In this case, the drawing in and ejection of the cassette 10 are
Since the cassette holding claw 42 of the chuck link 43, which is supported by the slide member 28, is pressed and engaged with the recess 14 of the cassette with a predetermined spring force, the lock is released and the spring is attached as described above. Even when force is used to return the cassette IO to the ejecting position, the cassette retaining claw 42 can be reliably prevented from coming off the cassette recess 14 due to acceleration/deceleration motion or impact, and therefore the cassette 10 can be prevented from popping out of the opening when the cassette is ejected. You can prevent it from falling.

In the above embodiments, the case where the present invention is applied to a floppy disk cassette loading device has been illustrated and explained. It can be used with various cassette loading devices as long as it is attached to the cassette.

The "stoppers 67A, 67B for preventing the cassette 10 from passing through the chuck position" in the embodiment are the slide members 28.
Although it is formed by a bent projection integral with the slide member 28, it can also be formed by a pin or stud implanted in the slide member 28.

〔Effect of the invention〕

According to the present invention, the cassette holding member provided with the chuck link that chucks the cassette is provided with a stopper that prevents the cassette from passing through the chuck position.
Provided is a cassette loading device that can correctly hold a cassette in a chuck position even when an impact force or the like is applied when inserting a cassette, and can reliably perform a chucking operation.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the main parts of the cassette loading device according to the present invention, with the left half in the ejection position and the right half in the loading position, and FIG. 3 is a left side view with another portion removed, as seen from line n-n in FIG. 1, and FIG. 4 is a left side view taken from line nn in FIG.
A partially removed right side view as seen from V-IV, FIG. 5 is a right side view with another portion removed as seen from the line 1t/-■ in FIG. 1,
FIG. 6 is a cross-sectional view taken from the line Vl-Vl in FIG. 1, FIG. 7 is a vertical cross-sectional view showing the cassette installed state, and FIG.
9 is a front view showing the cassette insertion opening of the cassette loading device in FIG. 1, and FIG. 10 is a mechanism and operation for opening and closing the shutter of the cassette in FIG. 1. FIG. 11 is a partial front view of the lock and release mechanism of the cassette in FIG. 1, and FIGS.
Partial sectional view taken along line A-A and line B-B in the figure, No. 13
The figure is a bottom view of the cassette used in the cassette loading device of FIG. 1. IO-・-・-・・・・・・・Cassette, 14----
−・−・−Concavity (chucking), 17−−−−−
------ Shutter (cassette), 19----- Slanted surface (to prevent incorrect insertion), 27----- Cassette holder, 28-------- Slide Element,
33A, 33B-----Guide groove (for cassette holder), 37A, 37B-----------
Guide groove (for sliding member), 42.
---Cassette holding claw, 43-------Chuck link, 48-----11--Door, 50.51
-・------・-Loading plate, 60A, 6
0B, 6IA, 61B ----------- Leaf spring (cassette holder), 67A, 67 B------
−−・・−Stopper (slide member), 72−・−
----------Engaging protrusion (shutter opening/closing), 73
・・−・−・・−・Cam groove (shutter opening/closing), 80-
・−−−−−−−Lock and release mechanism, 81・
-・-・-Mouth, Krifuku, 82・-・-----Ichishapin. Agent Patent Attorney Yasushi OotoFigure 8

Claims (2)

[Claims] (1) A cassette loading device characterized in that a cassette holding member provided with a chuck link for chucking the cassette is provided with a stopper for preventing the cassette from passing through the chuck position. (2) A cassette holder that is guided up and down and receives the cassette, and a slide member that is guided back and forth and up and down and has a cassette chuck means, and the slide member is provided with a stopper that prevents the cassette from passing through the chuck position. A cassette loading device featuring: