JPS63273255A - Cassette loading device - Google Patents

Abstract

PURPOSE:To prevent a misinsertion by making a cassette impossible to be inserted by colliding it to a chuck link at the time of misinserting the cassette. CONSTITUTION:When a cassette 10 is inserted and the inclined face of the cassette 10 is collide with the cassette holding claw 42 of a chuck link 43, this holding claw 42 is pushed to the outside, the chuck link 43 is rotated in a clockwise direction, the claw 42 is mounted onto the side face of the cassette 10 and slided. And when the cassette 10 reaches a pushing chucking position, the claw 42 is pushed in with spring force into the recessed part 14 of the cassette 10, which is held so as to move in backward and forward directions together with a sliding member 28. At the time when the cassette 10 is misinserted and the inclined face 19 is not at the chuck link 43 side, the cassette 10 is stopped by colliding with the chuck link 43 and cannot be inserted to a discharging position.

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 as recording (recording) and playback media are generally stored in cassette cases, and these devices have a cassette installed in a position opposite the head. A cassette loading device is provided for loading into the cassette.

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 (substantially the same as the chucking position), and the cassette is taken out from there.

[Problem that the invention seeks to solve]

By the way, in this type of cassette loading device, it is expected that the user will insert the cassette incorrectly with the front and back or front and back reversed, and if this incorrect insertion occurs, there will be some method to detect this or a mechanical system will be installed. It is required that the structure be such that it cannot be inserted into the

Therefore, conventional means have been provided to prevent incorrect insertion, but
In the conventional structure, the above-mentioned chucking means and the above-mentioned erroneous insertion prevention means are provided completely separately, resulting in a problem that the structure is complicated and the space required increases.

[Means for Solving the Problems] The present invention has been devised in view of the above-mentioned problems of the prior art. It is an object of the present invention to provide a cassette loading device that can simultaneously achieve the function of preventing erroneous insertion.

In the present invention, the cassette is inserted while pressing and moving the cassette holding claw of the chuck link with the inclined surface of the tip of the cassette,
A cassette loading device is provided with a chucking means for latching the cassette holding claw to the cassette by a spring force when the cassette is inserted to a predetermined depth, and configured so that when the cassette is incorrectly inserted, the cassette collides with the chuck link and becomes impossible to insert. , which achieves the above objectives.

(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 cassette 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 ILA.

There is a floppy disk 1 inside the case formed by 11B.
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 chunking means, which will be described later, engages.

Furthermore, positioning holes 15A, 15B, 1, 1, 1, and 15 are engaged with the lower surface of the cassette 10, and positioning pins provided at the base of the cassette mounting section engage with the positioning holes 15A, 15B, and 1 for accurately determining the position of the cassette.
5c and 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) 1B that engages with an engaging protrusion of a shutter opener, which will be described later.

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 10 (the right side in the back view of Figure 13)
has an inclined surface (slide surface) 19 to prevent incorrect insertion.
is formed. , it should be noted that the illustrated cassette 10
On the back side of the disc 12, in order to prevent the rotational vibration of the disc 12,
At the mounting position, the disk 1 is abutted by springs etc. from above and below.
A stabilizer 20 is attached that applies a predetermined pressure between the two.

Furthermore, a write protector 21 is provided at each corner of the cassette 10 to prevent erroneous erasure.

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

FIG. 4 is a partially removed right side view taken from line IV-IV when the door is closed in FIG. 1, and FIG.
- It is a right side view with other parts removed as seen from IV.

FIG. 6 is a partially omitted cross-sectional view when the door is opened, taken along the line Vl-VT 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.

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

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 (guide grooves) 34A, 34B, and 34C formed at three locations, and engagement pins 35A, 35B, and 35 implanted in the cassette holder 27.
By engaging with C, the cassette holder 27 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 10 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.

Further push in cassette 10 and chuck it at position 5! (or discharge position), the cassette holding claw 42 is pushed into the recess 14 of the cassette 10 by a spring force, the cassette 10 is chucked by the pressing engagement of the chuck link 43 biased by the spring 44, and the slide member It is held so as to move in the front and back direction together with 28.

Note that if the cassette l-10 is inserted incorrectly and the inclined surface 19 is not on the chuck link 43 side, the cassette lO will collide with the chuck link 43 and be stopped.
Unable to insert into 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, 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.

Each of the left and right loading plates 50.51 has two guide grooves 55A, 55B and 56A, 56B.
are formed, and each guide groove has engaging pins 57A, 57B implanted in the left and right side plates (fixed) 25, 26,
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 engaging 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, 51, 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 is interlocked with the movement of the door 48 from the closed 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 lowered by a height V along with the cassette 1O.

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.

In other words, the above-mentioned force-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, leaf springs 64A and 64B for pressing the cassette 10 are placed on the left and right sides of the upper surface of the cassette holder 27.
are attached, and both ends of these slope springs are connected to 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 10 inserted therein is pressed against the guide portions 31A, 31B (FIG. 6) to hold the cassette 10 without wobbling.

As mentioned above, the chuck link 43 for chucking the cassette IO 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 in which the cassette holding claw 42 (Fig. 1) is pressed into engagement with the recess 14 (Fig. 13) of the cassette 10 by the 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 67A167B is formed by an integral protrusion bent downward from the slide member 28, and in the illustrated example, it is formed by an elongated hole 68 in the longitudinal direction formed in the cassette holder 27.
By projecting the stoppers 67A and 67B downward through A and 68B, the structure is such that there is no problem in the retracting operation of the cassette 10.

FIG. 10 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 IO and its operation.

In FIGS. 1 and 10, as described above, the guide groove 34C is a longitudinally elongated hole formed in the slide member 28.
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 IO 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).

Further, 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 shunter opener 71 in the shutter opening/closing direction.

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

In this way, cam means 35C, 71, 73 are provided to change the movement of the chucked cassette IO into movement in the shutter opening/closing direction (left to right) of the cassette, and the concave portion of the shutter 17 is provided in the shutter opening/closing direction moving portion of the cam means. A mechanism is provided in which a claw portion (engaging protrusion) 72 that engages with the cassette 18 is provided, and the shutter 17 is moved to open and close the opening 16 in conjunction with the pushing (retraction) and ejecting (ejecting) of the cassette 10.

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

In FIG. 1, when the cassette IO is locked in the mounting position with the shutter 17 open, the recording/reproducing head 100 is guided into the cassette from the opening 16 (FIGS. 10 and 13) of the cassette 10, It operates to record (write) or read information while moving linearly (head feeding) in the front-rear direction from the opening.

1 and 7, the base 75 has a pin 76 for positioning the cassette 10 (case IIA%IIB).
A, 76B, 10IA, 10IB and the driving and positioning of the floppy disk 12 (height and planar position,
A rotary boss 77 for parallelism) is provided.

In the illustrated example, the positioning of the cassette 10 in the x and y directions is performed by two pins 76A and 76B, and the positioning of the cassette 10 in two directions (thickness direction of the floppy disk 12) is performed by pins 76A and 76B. pins 76A, 76B, l
The structure is implemented by 0IA and 10IB.

When the cassette 10 is pushed in and lowered by the aforementioned movement of the loading plate 50.51, first, the recesses 15A, 15B, 15C115D (13th
) are the pins 76A, 76B, l0IAS l0IB
At the same time, the hub 13 (FIG. 13) of the disk 12 comes into contact with the rotary boss 77, and the cassette 1O 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 60 of the loading plates so and st.
B and 61A, 61B cause the cassette 10 to be pulled downward a little further than the guide portion 31A, 31B and the cassette lO. 8A and 78B are generated.

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 FIGS. 1 and 4, when the cassette 10 is locked in the mounting position (FIG. 7) by the movement of closing the door 4B between the right side plate 26 and the right loading plate 51, and the door is pushed again. The cassette 10 is released by the movement of the loading plate 50, and the return spring 62A of the loading plate 51 is
, 62B is provided to return (eject) the cassette 10 to the discharge position.

FIGS. 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.0 In the illustrated example, the lock link 81 is fitted to the pin 83. Pin 83 by coil spring 84
The spring 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. It is in the initial rotational position of impact.

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 begins 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 cassette 10 is pushed in by a certain amount, 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 5, and the engagement pin 82 is latched in 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
The lock links 81, which are biased counterclockwise in FIG. 1, are stably engaged and held with each other.

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 plate 51 is pushed a certain distance back against the spring 62B, and the engagement pin 8
When the retaining pin 82 comes out of the lock position 90, the lock link 8
1 rotates slightly counterclockwise by the spring 85, and the engagement pin 82
comes to the release start section 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 as to be displaceable in the axial direction, so the engagement pin 82 can easily overcome the release guide part 92 by the spring force of the spring 62B, and the left and right The loading plate 50, 51 is immediately returned to the ejection position (approximately the same ejection position as the chucking position when the cassette 10 is inserted) by the spring force of the left and right return springs 62A, 62B.

That is, by simply pushing the door 48, the cassette 10, which 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 cassette 10 is pulled in and discharged while the cassette holding claw 42 of the chuck link 43, which is supported by the slide member 28, is pressed into the recess 14 of the cassette with a predetermined spring force. Even when the lock is released and the cassette 10 is returned to the discharge position by the spring biasing force as described above, it is possible to reliably prevent the cassette holding claw 42 from coming off the cassette recess 14 due to acceleration/deceleration motion or impact. Therefore, it is possible to prevent the cassette 10 from jumping out of the opening and falling when the cassette is ejected.

In the above embodiments, the present invention has been illustrated and explained as being applicable to a floppy disk cassette loading device, but the present invention is applicable to a cassette drive device (mechanism) such as a video tape cassette, a CD cassette, an audio power center, etc. It can be applied to various cassette loading devices as long as it is mounted inside the device.

In the embodiment described above, the cassette holding claw 42 is provided on the chuck link 43 having a rotation fulcrum on the slide member 28, and the chuck link 43 is rotated by the biasing force of the spring 44 to latch the cassette 10. As shown in FIG. 14, it is also possible to integrate the chuck link with the slide member 28 and form the cassette holding claw 42 in a part of the slide member 28 by utilizing its elasticity (bending, springiness). It is.

〔Effect of the invention〕

According to the present invention, the cassette is inserted while pressing and moving the cassette holding claw of the chuck link with the inclined surface at the tip of the cassette, and when the cassette is inserted to a predetermined depth, the chucking means is configured to latch the cassette holding claw on the cassette with a spring force. The structure is such that when a cassette is incorrectly inserted, the cassette collides with the chuck link and becomes impossible to insert, so the cassette chucking function and the function to prevent incorrect insertion are achieved without increasing the number of parts or increasing the required space. A cassette loading device that can realize this with a simple structure is obtained.

[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. Part deleted left side view, Figure 3 is a left side view with another part removed from line n-n in Figure 1 □ Left side view, Figure 4
The figure is a partially removed right side view as seen from line IV-IV in Fig. 1, Fig. 5 is a right side view with another part removed as seen from line IV-IV in Fig. 1, and Fig. 6. is a side view taken from the line Vl-Vl in Fig. 1, Fig. 7 is a vertical sectional view showing the cassette mounted state, Fig. 8 is a plan view of the cassette holder in Fig. 1,
9 is a front view showing the cassette insertion opening of the cassette loading device in FIG. 1, FIG. 1θ is a partial plan view showing the mechanism and operation for opening and closing the shutter of the cassette in FIG. 1, and FIG. 1L is a Partial front view of the cassette lock and release mechanism in Figure 1, (A) and (B) in Figure 12
11 is a partial sectional view taken along line A-A and line B-B in FIG. 11, FIG. 13 is a bottom view of the cassette used in the cassette loading device of FIG. 1, and FIG. FIG. 7 is a plan view partially showing main parts of another embodiment. 10−・−・−・・−Cassette, 14・−・−・−・−
Recessed portion (chucking), 17------- Shutter (cassette), 19-------- One inclined surface (prevention of incorrect insertion), 27-------- m=--Cassette holder, 28----------Slide member, 33A, 33B---Guide groove (
for cassette holder), 37A, 37B-・--1-
-----Guide groove (for sliding member), 42-・-・
−・−・Cassette holding claw, 43−・−−1−−−−−
Chuck link, 48--------1 door, 50
．． 51-1---Loading plate, 60
A, 60B, 61A, 61B...-- Leaf spring (cassette holder), 67A, 67B...--
-Stopper (slide member)? 2------
-----・Engaging protrusion (shutter opening/closing), 73---
-----------One cam groove (shutter opening/closing), 80-
-1-・--Lock and release mechanism, s t--
−−−−−−・−mouth・7 clicks, 82−−−−−−
--1. Engagement pin. Agent: Yasushi Ooto, Patent AttorneyFigure 6Figure 14

Claims (1)

[Claims] (1) Insert the cassette while pressing and moving the cassette holding claw of the chuck link with the inclined surface at the tip of the cassette, and when the cassette is inserted to a predetermined depth, a chucking means is provided to latch the cassette holding claw to the cassette with a spring force, and the cassette is A cassette loading device configured such that when the cassette is inserted incorrectly, the cassette collides with the chuck link and becomes impossible to insert.