JPH0194561A - Cassette loading device - Google Patents

Abstract

PURPOSE:To attain a sure loading action by bringing one part of a cassette holding member into contact with a fixing member in the condition of not inserting a cassette in a regular discharge position and blocking a loading start. CONSTITUTION:The title device is equipped with a cassette holding member 43 in the cassette discharge position to lock a chucking concave part 14 provided to a cassette 10 by the energizing force of a spring, etc., so that the cassette 10 can be led in and led out. The titled device is constructed to position-control by a cam means so that a cassette holding nail 42 of the cassette holding member 43 may not get off the chucking concave part 14 in the lead-in action process of the cassette 10. Thus, at the time of the lead-in action of the cassette 10, the cassette holding nail 42 is prevented from getting off the concave holding nail 42 is prevented from getting off the concave part 14 for chucking of the cassette 10 and the sure lead-in action can be executed.

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.

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.

By the way, in this type of cassette loading device, when the cassette inserted to a certain depth from the opening is chucked by the cassette holding member (for example, a chuck link) and the cassette is retracted, the discharge position of the cassette is (approximately the same as the chucking position), a method has been adopted in which a cassette holding claw for holding the cassette, which is biased by a spring or the like, is hooked into a chucking recess provided in the cassette, and the cassette holding claw is pulled inward by a drive device. There is.

[Problem that the invention seeks to solve]

In this case, if the loading operation (retracting operation) is started without the cassette being inserted into the correct discharge position, the cassette will not be stuck in the chucking recess of the cassette because the cassette holding claw is not engaged there. There has been a problem in that the loading operation continues with the device remaining in place or being introduced in an incorrect position.

When loading a cassette, if the force is applied in an incorrect position, parts such as heads, spindles, reel stands, capstans, etc. involved in recording and playback and media drive may be placed in incorrect positions relative to the corresponding parts of the cassette. This causes problems such as damage to these parts and corresponding parts of the cassette, and further problems such as making it impossible to eject the cassette.

[Means for Solving the Problems] The present invention has been made in view of the problems of the prior art described above, and is designed to prevent the loading operation (retracting operation) from starting when the cassette is not inserted into the normal ejecting position. It is an object of the present invention to provide a cassette loading device which can ensure reliable loading operation.

The present invention utilizes the fact that the position of the cassette holding claw is different when the chucking recess formed in the cassette is latched by the cassette holding claw and when it is not latched,
When the cassette is not inserted into the normal discharge position and the cassette holding claw is not engaged in the chuffing recess of the cassette, a part of the cassette holding member (for example, chuck link) that has the cassette holding claw is The above object is achieved by a cassette loading device configured to abut against the abutting portion of the fixing member and prevent the start of loading.

〔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 IIA.

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 case IIA, 11B.
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 on both side edges of the lower surface of the cassette 10, into 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 a locking protrusion of a shutter opener to 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 10 (the 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 a spring or the like from above and below at the mounting position. There is.

Furthermore, write protectors 21 are provided at the corners of the cassette 10 to prevent accidental 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 is a partially removed left side view taken from line ff-II when the door is opened in Figure 1, and Figure 3 is a partially removed left side view taken from the same line ■-■ as in Figure 2. This is the left side with .

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

FIG. 6 is a partially omitted cross-sectional view when the door is opened, taken along line Vl--Vl 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 force center holder 27 connects the left and right engaging pins 32A, 32B to the left and right side plates 25.2.
It is assembled to be movable up and down by fitting into vertical guide grooves 33A and 33B formed in 6.

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 G, it is slidably engaged with the cassette holder 27 in the front-back direction.

Further, this slide member 28 connects the engaging pins 36A and 36B provided on both sides of the slide member 28 to the left and right side plays 1 and 25.
．． 26, that is, guide grooves 37A and 37B having a horizontal portion and a vertical portion.

A cassette holding member (chuck link) 43 having a cassette holding claw 42 that engages with the chucking recess 14 of an inserted cassette is supported by a pivot point 41 provided on the slide member 28 . This chuck link 43 is urged counterclockwise in FIG. 1 by a spring 44 stretched between it and the slide member 28.

When the cassette 10 is inserted and the inclined surface 19 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 slides.

When the cassette 10 is pushed further and reaches the chucking position (or discharge position), the cassette holding claw 42 is pushed into the recess 14 of the cassette 10 by the spring force, and the cassette IO is moved to the chuck link 4 biased by the spring 44.
It is chuffed by the pressing engagement of No. 3 and is held so as to move in the front and rear direction together with the slide member 28.

Note that if the cassette 10 is inserted incorrectly and the inclined surface 19 is not on the cassette holding member (chuck link) 43 side, the cassette 10 will collide with the chuck link 43 and be stopped, making it impossible to insert it into the discharge position. I can't.

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.

There are two guides for each of the left and right loading plays 1-50.51>+? J55A, 55B and 56A
, 56B are formed, and each guide groove has an engaging pin 57A implanted in the left and right side plates (fixed) 25, 26.
57'B, 58A, and 58B are slidably engaged.

Moreover, each guide groove 55A, 55B and 56A.

56B are formed symmetrically, and these guide grooves are formed horizontally so as to guide each loading plate 50, 51 in the horizontal direction, but in the illustrated example, there is an oblique groove at the end of each guide groove. As a groove, two engaging cam portions 60A, 6
0B, 61A, and 61B are 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 engagement pins 36A, 36B of the slide member 28 are movably engaged with each other, 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 This is for guiding 28 back and forth and up and down.

The left and right loading plates 50.51 are biased in the loading direction (discharging direction) by tension springs 62A and 62B stretched between the left and right side plates 25.26.

In this way, 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, the slide member 28 that has chucked the cassette 10 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 IO.

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 cent 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 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 10 inserted therein is pressed against the guide portions 31A and 31B (FIG. 6) to hold the cassette 10 without wobbling.

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

The slide member 28 has a cassette holding claw 42 (see FIG. 1) in the recess 14 of the cassette 10 (see FIG. 13).
is pressed into engagement with the spring 44, that is, the cassette 1
a stopper 67A that comes into contact with the front end surface of the cassette IO to prevent excessive intrusion when the cassette IO is chucked;
67B (FIGS. 1 and 6) is provided. The stoppers 67A and 67B are formed by integral protrusions bent downward from the slide member 28, and in the illustrated example, the stoppers 67A and 67B are 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 10 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 relative 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 in the shutter opening direction (from left to right) relative to the slide member 28 (and therefore relative to the cassette IO).

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 10 is pulled in.

In this way, cam means 35C, 71, 73 for changing the movement of the chucked cassette 10 into a movement in the shutter opening/closing direction (left to right) of the cassette are provided, 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 constructed 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 (ejection) of the cassette 10. .

FIG. 7 shows the state in which the cassette 1-10 is installed, 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
is guided into the cassette from the opening 16 (FIGS. 10 and 13) of the cassette 10, and records (writes) or reads information while moving linearly (head feeding) in the front and back direction from the opening. It works like that.

4 and 7, the base 75 has a pin 76 for positioning the cassette 10 (cases IIA, 11B).
A, 76B, 10IA, 101B 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 all (4 pins). pins 76A, 76B, l
The structure is implemented by 0IA and 10IB.

When the cassette 10 is pushed in and lowered by the movement of the loading plate 50, 51 described above, the recesses 15A, 15B, 15C115D (13
(Fig. 13) contact the pins 76A, 76B, 10IA, 101B, and the hub 13 of the disk 12 (Fig. 13).
comes into contact with the rotary boss 77 to position the cassette 10.

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 FIGS. 1 and 4, when the cassette 10 is locked in the loading position (FIG. 7) by closing the door 48 between the right side plate 26 and the right loading plate 51, and when 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. In the illustrated example, the lock link 81 is connected to the pin 83 by a coil spring 84 fitted to the pin 83.
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. 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; Guide: I! J89 and Rock Link 8
1 and pin 82 are in a stable locked state.
0, 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 cassette 10 starts to close the door 4° 8 after being 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 move clockwise against the spring 85. (in Figure 1I).

When the engagement pin 82 further advances and passes through the cam portion 88 and reaches the entrance of the guide 189, the lock link 81 is moved by the spring 8.
The engaging pin 82 is rotated counterclockwise by the spring force of 5, and the engaging pin 82 is latched at the locking position v190. 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 play 1.51, which is biased by a spring toward the entrance (to the left in FIG. 11) at B (FIG. 4), and the lock link 81, which is biased counterclockwise in FIG. 11 by a spring 85, are mutually connected. It is engaged and held in a stable state.

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
2 comes out of the lock position 90 and moves slightly toward the back. When the engagement pin 82 is removed from 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 urged 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(B), 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 shown in FIG.
As shown by the middle two-dot chain line, the support pin 83 is held so that it can be displaced 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. The loading plate 50, 51 is immediately returned to the ejecting position (substantially the same ejecting position as the chucking position when the cassette 1-10 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 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 cassette holding member (chuck link) 43, which is pivotally supported by the slide member 28, is pressed and engaged with the recess 14 of the cassette with a predetermined spring force, the locking is performed as described above. Even when releasing the cassette 1° and returning the cassette 1° to the dispensing position using the spring biasing force, the cassette holding claws 42 may be damaged due to acceleration/deceleration motion or impact.
4, and therefore, the cassette 10 can be prevented from jumping out of the opening and falling when the cassette is ejected.

In the above embodiments, the present invention is 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 cassette, etc. It can be applied to various cassette loading devices as long as it is mounted inside the device.

FIG. 14 shows the cassette holding member (chuck link) 43.
FIG. 2 is a partial plan view showing a knocking-off prevention mechanism and a loading start prevention mechanism, which are comprised of a cassette holder 27 and a cassette holder 27;

In FIG. 14, a cassette holding member (chuck link) 43 pivotally supported by the slide member 28 (FIG. 1) is formed with an engaging protrusion 43A that protrudes toward the cassette holder 27 located below. On the other hand, the cassette holder 27 is formed with a guide groove 97 into which the engagement protrusion 43A is inserted.

However, this guide groove 97 has a restriction guide portion 97 that slides into engagement with the engagement protrusion 43A to prevent clockwise rotation of the force center holding member 43 during the cassette retracting operation.
A is provided.

This regulation guide portion 97A has a shape that prevents the cassette holding member 43 from rotating in the unchucking direction during the force pulling operation process, and allows the cassette retaining member 43 to come off the chuck at the ejecting position. , constitutes a cam means for restricting rotation of the cassette holding member 43.

That is, the cassette 10 that has been inserted to the cassette ejecting position is latched by the cassette holding claw 42 of the cassette holding member (chuck link) 43 that receives the biasing force of the spring 44 (FIG. 1), and enters the chucking state. When the door 48 (FIG. 1) begins to close from this chucking state, the retracting operation of the cassette 10 begins.

At that time, the cassette holding member 43 that moves rearward engages its engagement protrusion 438 and the regulation guide portion 97A of the guide i97.
Due to the engagement with the cassette 10, the cassette holding claw 42 cannot be rotated clockwise (removal direction) in FIG. .

In addition, in FIG. 14, the force center holding claw 42 does not engage the chucking recess 14 of the cassette 10 in the guide groove 97 of the cassette boulder 27, and the cassette 10
0, that is, when the cassette holding member (chuck link) 43 is rotated slightly clockwise from the chucking position (solid line) as shown by the two-dot chain line in FIG. A contact portion 97B is provided with which the engagement protrusion 43A collides to prevent the cassette retracting operation.

This contact portion 97B cooperates with the engaging protrusion 43A of the cassette holding member 43 to constitute a loading start blocking mechanism.

That is, if the inserted cassette 1-1o is not at the normal discharge position, the chucking recess 1 of the cassette 10
4 is not latched by the cassette holding claw 42, and the cassette holding claw 42 is in a state of riding on the outer peripheral end surface of the cassette 10, and the cassette holding member 43 is in the normal position (solid line) as shown by the two-dot chain line. ), that is, the engagement protrusion 43A is located at the position slightly rotated clockwise from the cassette holder 27.
It is in the position where it hits the 0 contact portion 97B and stops at the 11 position.

In other words, even if an attempt is made to perform a loading operation (operation of closing the door 48) when the cassette 10 is not in the normal discharge position, the entire mechanism will be locked due to the collision between the engagement protrusion 43A and the contact portion 97B, and the Unless the cassette is reinserted into position, the slide member cannot be moved rearward (towards the back) for the second time, and loading is prevented from starting.

In this way, the chucking recess 1 provided in the cassette 10
When the cassette holding member 4 is not latched by the holding claw 42 of the cassette holding member 43, the cassette holding member 4
A cassette loading device is configured in which the start of loading is prevented by a part of the cassette 3 (the engaging protrusion 43A) coming into contact with the abutting portion 97B of the fixing member (cassette holder 27).

FIG. 15 is a left side view of the vicinity of the head in FIG. 1.

Next, the head pressure contact mechanism will be explained with reference to FIGS. 1 and 15.

In FIG. 1, the head holding member 93 is a guide 193A.
, 93B and the guide pin 35A of the cassette holder 27,
It is disposed so as to be slidable back and forth under the guidance of 35B, and is biased forward by a spring 95.

This head holding member 93 is a head holding portion 93C193D.
(Fig. 1, Fig. 15).

FIG. 1 shows a state in which the cassette 10 is in the discharge position and the head holding member 93 is located at the frontmost position.

When a cassette is inserted, when the loading operation is started from the discharge position shown in FIG. Move it backwards by an amount that is approximately the same as the amount of movement of 10.

On the other hand, in the case of a loading operation when the cassette is not inserted, the head holding member 93 remains in the state shown in FIG. 1.

By the way, the head holding member 93 is provided with two head holding parts 93C and 193D having different heights as shown in FIG. When the cassette is inserted (when in the mounting position), the other holding portion 93D engages with the engaging portion 99A.

During loading after inserting a cassette, the head holding part 93D of the head holding member 93, which is formed at approximately the same height as the holding part of another head holding member (formed on the cassette holder 27) formed on the right side of the head, In the process of lowering and mounting the cassette (cassette holder 27), the contact with the head holding portion engaging portion 99A is released, and the upper head 100B is pressed against the disk 12.

On the other hand, when the loading operation is performed with the cassette not inserted, the head holding part 93C of the head holding member 93, which is formed at a higher position than the holding parts of other head holding members, still remains when the cassette is lowered and installed. A head support member (head arm) is held in a position where the head does not come into pressure contact with the head, and the head or pad is not brought into contact with the head when the disc is not in use.

16 to 19 are diagrams showing the door erroneous opening prevention mechanism of the recording/reproducing apparatus according to the present invention, FIG. 16 is a front view of the door in a state where it can be opened, and FIG. 17 is the same as that of FIG. 16. FIG. 18 is a front view showing a state in which the door cannot be opened (a state in which the accidental opening prevention mechanism is activated);
The figure is a plan view of FIG. 18.

: In Figures 416 to 19, a front panel 46 having an opening 45 (Figure 9) such as a cassette insertion slot of a recording/reproducing device that drives a recording/reproducing medium such as an optical disk or a bidet is in a locked state. A door opening prevention member 96 having a door opening prevention claw 96G is provided, and by operating the door opening prevention member 96, the door 48 can be opened by pressing again. In other words, a door erroneous opening prevention mechanism is provided which is configured to set the cassette 10 in a state where ejection operation is prevented.

In FIGS. 16 to 19, the door opening prevention member 96 is assembled so that it can slide vertically relative to the door 48, that is, in the illustrated example, it can move vertically along a guide groove 48A provided in the door 48. In the raised position, a door lock pawl 96C formed at the upper end of the door opening prevention member 9G projects upward from an upper end opening window 48C formed in the door 48.

This door opening prevention member 96 is mounted so that it can be moved with a click between the door opening (ejection) possible position shown in FIGS. 16 and 17 and the door unopenable position shown in FIGS. 18 and 19. There is.

In the door opening prevention position in which the door opening prevention member 96 is raised in FIGS. 18 and 19, the door lock claw 96C of the door opening prevention member 96 is located in the gap between the front panel 46 and the door 48, The pressing operation of the door 48 for opening (ejecting) the door is blocked.

In the door openable position where the door opening prevention member 96 is lowered as shown in FIGS. 16 and 17, the cassette can be opened by pressing the door 48 as explained in the ejecting operation of the cassette 10 described above. 10 can be ejected to the ejection position.

The door opening prevention member 96 is moved up and down by manually operating a door lock knob 96A provided on the member.

In this case, the click action of the door opening prevention member 96 is, in the illustrated example, a lock pin 48I provided on the door 48.
3 and a spring-type lock bin latching portion 96B provided on the door opening prevention member 96, and by pulling out and disengaging the door opening prevention member 96. The door is securely held in either the opening prevention position) or the lowered position (door opening position).

In this way, the structure is such that erroneous opening of the door 48 can be reliably prevented simply by shifting the door lock knob 96A upward.

In the illustrated embodiment, the present invention is applicable to a structure in which the cassette 10 is chucked at one location on the left side (FIG. 1), but the present invention has chaffing recesses 14 on both left and right sides of the cassette 10. This can be similarly implemented in a cassette loading device having a structure in which chucking is performed using two left and right cassette holding members (chuck links) 43, and similar effects can be achieved.

〔Effect of the invention〕

As is clear from the above description, according to the cassette loading device of the present invention, the cassette holder is latched by a biasing force such as a spring so that the cassette can be pulled into the chucking recess provided in the cassette at the cassette discharge position and pulled out. The position of the member is controlled by the cam means so that the cassette holding claw of the cassette holding member does not come off from the chucking recess of the cassette during the cassette retraction process, so that the cassette A cassette loading device is obtained which can prevent the cassette holding claw from coming off from the chucking recess and can perform a reliable retracting 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. Fig. 3 is a left side view with another part removed as seen from line n-n in Fig. 1, Fig. 4 is a left side view taken from line r in Fig. 1.
A partially removed right side view as seen from the V-TV; FIG. 5 is a right side view with another portion removed as seen from line IV-IV in FIG. 1;
FIG. 6 is a cross-sectional view taken from line vt-vt in FIG. 1, FIG. 7 is a longitudinal cross-sectional view showing the cassette installed state, and FIG.
FIG. 9 is a front view showing the cassette insertion opening of the cassette loading device in FIG. 1, and FIG. 10 shows the 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. 12 (A) and (B) are lines AA and B in FIG. 11, respectively. -A partial sectional view taken along line B; FIG. 13 is a bottom view of the cassette used in the cassette loading device shown in FIG. 1; and FIG. 14 is a mechanism for preventing chucking from coming off and controlling loading start in FIG. 1. FIG. 15 is a left side view of the head and its surroundings in FIG. 1, FIG. 16 is a front view of the door accidental opening prevention mechanism in FIG. 1 when the door can be opened, and FIG. Plan view of Figure 16, No. 18
The figure is a front view of the door erroneous opening prevention mechanism when the door cannot be opened.
FIG. 19 is a plan view of FIG. 18. 10-・-・--・・-cassette]・, 14-・・・・-chunking recess, 27-・・・・・・・-1 cassette holder, 2 B −−−−−−−slide member , 4
2...--1--Cuscent holding claw, 43...
−・−・−・Cassette holding member (chuck link), 4
3A-m---Engaging protrusion, 44---1.-Cassette holding member (chuck link), 45---
Sekiguchi section, 46・----1---front panel,
48-・-1-----~door, 50.51-・-・-
Loading plate, 80--Lock and release mechanism, 96--1--Door opening prevention member, 96C--Door opening prevention claw, 97--
-11--Guide groove, 97A--Restriction guide portion, 97B--1--Abutting portion. Agent Patent Attorney Takeshi Ototo Figure 13 Figure 14 Figure 15 S Figure 1°6 Figure 48C48 Figure 18 Figure 19

Claims (1)

[Claims] (1) When the chucking recess provided in the cassette is not latched by the cassette holding claw of the cassette holding member, a portion of the cassette holding member comes into contact with the contact portion of the fixing member, and loading cannot be started. A cassette loading device configured to be blocked.