JPH0721915B2 - Cassette loading device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cassette loading device for mounting a floppy disk cassette, a video tape cassette, or the like inserted through an opening in a drive device.

[Prior art]

In computers, word processors, audio equipment, etc., a floppy disk or magnetic tape as a recording / playback medium is generally used in a state that it is housed in a cassette case. A cassette loading device is provided for loading into.

This cassette loading device generally chucks a cassette inserted to a certain depth from an opening with a cassette holding member, further introduces the cassette holding member to a cassette mounting position and locks it, and unlocks it when taking out the cassette. The cassette holding member is returned to the ejection position (substantially the same as the chucking position) to take out the cassette.

[Problems to be solved by the invention]

By the way, in this type of cassette loading device, it is expected that the user will erroneously insert the cassette upside down or the front and back, and if there is this erroneous insertion, they will be detected by some method or mechanically inserted. It is required to have a structure that cannot be inserted into.

Therefore, although an erroneous insertion prevention means has been provided conventionally,
In the conventional structure, the chucking means and the erroneous insertion preventing means are provided separately, and there is a problem that the structure is complicated and the required space is increased.

[Means for solving problems]

The present invention has been made in view of the above-mentioned problems of the prior art, and simultaneously achieves the function of preventing the chucking of the cassette and the erroneous insertion of the cassette with an extremely simple structure without increasing the number of parts and the required space. It is an object to provide a cassette loading device to be obtained.

The present invention relates to a cassette holder that is movably supported between a cassette ejection position at which a cassette can be attached to and detached from an apparatus body and a cassette loading position at which the cassette is loaded at a predetermined loading position in the apparatus body. A loading means for moving the cassette holder between the cassette ejection position and the cassette loading position, and a front and rear slidable arrangement in the cassette insertion direction on the cassette holder and engageable with the loading means. A slide member which is moved in the insertion direction of the cassette by the loading means, and arranged on the slide member,
A chuck for engaging and holding the engaging portion of the cassette by inserting the cassette into the cassette holder by a predetermined amount, and pulling the cassette into the cassette holder by the sliding operation of the slide member. And a chuck link, when the cassette is correctly inserted into the cassette holder, the chuck link allows the predetermined amount of the cassette to be inserted by being pressed and moved by the inclined surface of the cassette tip, The above object is achieved by a cassette loading device characterized in that, when the cassette is erroneously inserted, the cassette abuts against the tip of the cassette to prohibit the insertion of the predetermined amount of the cassette. It is a thing.

〔Example〕

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

<< Description of Recording Medium Used in the Present Invention >> FIG. 13 is a rear (bottom) view of a floppy disk cassette 10 suitable as a cassette to be mounted in the cassette loading device according to the present invention.

In FIG. 13, a floppy disk 12 is rotatably supported in a case formed by upper and lower cassette shells 11A and 11B. The floppy disk 12 has its hub (disk hub) 13 pivotally supported at the center of the cases 11A and 11B.
The hub 13 has an end face formed of a magnetic material, and is positioned and attached by adsorbing the end face to a magnet supporting surface of a drive shaft that is axially supported by a mounting portion on the cassette loading device side.

Recesses (notches) 14 with which cassette holding claws of a chuck link of chucking means, which will be described later, are engaged are formed at both end edges of the lower surface of the cassette 10.

Positioning holes 15A, 15B, 15C and 15D are provided on the lower surface of the cassette 10 to engage positioning pins provided on the base of the cassette mounting portion to accurately determine the position of the cassette.

The lower cassette shell 11B is formed with an opening 16 for exposing a head facing portion (usually provided on the upper and lower two surfaces) of the disk 12, and the opening 16 moves a slide type shutter 17 left and right. It can be opened and closed. The shutter 17 is biased in the closing direction by a torsion coil spring or the like, and is opened in association with the pulling operation when the cassette is mounted. The shutter 17 is formed with a recess (or notch) 18 with which an engagement protrusion of a shutter opener in a cassette loading device described later is engaged.

Note that in FIG. 13, the shutter 17 is located between the closed position and the open position.

An inclined surface (slide surface) 19 is formed on the left side (the right side in the rear view of FIG. 13) of the cassette 10 as an erroneous insertion preventing shape.

In addition, on the back surface of the cassette 10 shown in the figure, in order to prevent rotational shake of the disk 12, a stabilizer 20 is attached which receives a predetermined pressure from the upper and lower sides by abutting a spring or the like at the mounting position. There is.

Further, a write protector 21 for preventing accidental erasure is provided at the corner of the cassette 10.

<< Description of Configuration of Cassette Loading Device >> FIG. 1 is a plan view of an essential part of the cassette loading device according to the present invention. The upper half part shows a state where the door of the cassette insertion port is open, and the lower half part has the door. Shows a closed state.

Fig. 2 is a left side view of the door shown in Fig. 1 when line II-II is opened when a door is opened, and Fig. 3 is the same line II- as in Fig. 2.
It is the left side view with some other parts removed from II.

Fig. 4 is a right side view of the door shown in Fig. 1 when the door is closed as seen from the line IV-IV, and Fig. 5 shows another portion seen from the line IV-IV which is the same as Fig. 4. It is the right side that was deleted.

FIG. 6 is a cross-sectional view of the door when partially opened, taken along the line VI-VI in FIG.

1 to 6, a cassette loading device is a left side plate 25 fixed to a machine frame such as a drive device.
And the right side plate 26, the left and right side plates 2
Vertical guide grooves 33A, 33 formed by 5 and 26, respectively
A cassette holder 27 that is guided by the B to be movable in the vertical direction is arranged, and a slide member (cassette holding member) 28 that overlaps with the cassette holder 27 and is guided forward and backward and up and down by the grooves 37A and 37B is provided. It is supported.

As shown in FIG. 6, the cassette holder 27 has a cross-sectional shape having guide portions 31A and 31B on the lower left and right sides so that the cassette 10 inserted from the front opening can be slid back and forth in the insertion direction. ing.

More specifically, the cassette holder 27 has engagement pins 32A, 32B provided on the left and right sides, and the left and right side plates 25,
By being fitted in the vertical guide grooves 33A and 33B formed in 26, it is assembled so as to be movable up and down.

Further, the slide member 28 is superposed on the cassette holder 27, and the longitudinal grooves (guide grooves) 34A, 34B, 34C formed at three positions are engaged with the engagement pin 35A which is planted in the cassette holder 27. By engaging with 35B and 35C, the cassette holder 27 is slidably engaged in the front-rear direction.

Further, the slide member 28 engages engagement pins 36A and 36B provided on both sides thereof with bending guide grooves formed in the left and right side plates 25 and 26, that is, guide grooves 37A and 37B having horizontal and vertical portions. By doing so, it is assembled so as to be movable in the front-rear direction and the up-down direction.

Therefore, the cassette holder 27 is movable only in the vertical direction, and the slide member 28 is arranged so as to be slidable back and forth with respect to the cassette holder 27 and movable in the vertical direction together with the cassette holder 27.

<< Description of Cassette Holding Member (Chuck Link) that Holds Inserted Cassette >> At the shaft fulcrum 41 provided on the slide member 28, a cassette holding claw 42 that locks in the chucking recess 14 of the inserted cassette. A cassette holding member (chuck link) 43 having a shaft is rotatably supported. The chuck link 43 is a spring 44 stretched between the chuck link 43 and the slide member 28.
It is biased counterclockwise in FIG.

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 and the chuck link 43 rotates clockwise to hold the cassette holding claw 42. The claw 42 rides on the side surface of the cassette 10 and slides.

When the cassette 10 is pushed further in and reaches the chucking position (or the discharge position), the cassette holding claw 42 is set to the cassette.
The cassette 10 is pushed into the concave portion 14 of the spring 10 by spring force, and the cassette 10 is chucked by the pressing engagement of the chuck link 43 biased by the spring 44, and is held so as to move in the front-rear direction together with the slide member 28.

When the cassette 10 is erroneously inserted and the inclined surface 19 is not on the cassette holding member (chuck link) 43 side, the cassette 10 collides against the chuck link 43 and is stopped, so that the cassette 10 should be inserted into the ejection position. I can't.

<< Explanation of Mechanism for Loading and Ejecting Cassette >> 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 surface of the cassette loading device, and the opening 45 is opened and closed by a door 18 which rotates around a shaft fulcrum 47 (see FIG. 4).

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

That is, the pivots 52A, 52B provided on the left and right of the door 48
One end of the left and right door rings 53A and 53B is rotatably connected to each of the above, and the other ends of these door rings 53A and 53B are connected to the front end portions of the left and right loading plates 50 and 51 via pivot shafts 54A and 54B, respectively. Is rotatably connected to.

2 for each of the left and right loading plates 50, 51
Book guide grooves 55A, 55B and 56A, 56B are formed. Engagement pins 57A, 57B, 58A, 58B planted in left and right side plates (fixed) 25, 26 are slidable in each guide groove. Engaged.

Further, the respective guide grooves 55A, 55B and 56A, 56B are formed symmetrically, and these guide grooves are formed horizontally so as to guide the loading plates 50, 51 in the horizontal direction so as to be movable back and forth. In the illustrated example, engaging cam portions 60A, 60B, 61A, 61B as inclined grooves are formed at the end portions of each guide groove.

These engagement cam portions 60A, 60B and 61A, 61B slidably engage with the left and right engagement pins 32A, 32B of the cassette holder 27 and the left and right engagement pins 36A, 36B of the slide member 28. This is for guiding the cassette holder 27 up and down by moving the left and right loading plates 50 and 51 forward and backward, and for guiding the slide member 28 forward and backward with respect to the cassette holder 27 and up and down together with the cassette holder 27.

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

Thus, the operation of moving the door 48 from the open position of FIGS. 2 and 3 to the closed position of FIGS. 4 and 5, that is, the movement of closing the door 48, interlocks with the loading plate.
When 50 and 51 are moved in the cassette insertion direction and the slide member 28 chucking the cassette 10 is pulled inward by a distance H (Fig. 2), the engagement pins 36A and 36B of the slide member 28 are guided into the guide grooves 37A and 37B. Of the sliding member 28 until the engaging portion 36A, 36B of the slide member 28 reaches the vertical portion of the guide groove 37.
Since the slide member 28 and the cassette holder 27 do not descend because they move the horizontal portions of A and 37B, both the slide member 28 and the cassette holder 27 are moved downward together with the cassette 10 according to the vertical portions of the guide grooves 37A and 37B. Height V
It is configured to lower only.

The movement at this time is performed by the cam engaging portions 60A, 61A, 60B, 61B formed on the loading plates 50, 51 with the engaging pins 32A, 36A, 32.
By mechanically guiding B and 36B, the movement is reliably performed in an amount corresponding to the closing motion of the door 48.

In other words, the above cassette loading movement is not performed by the spring elastic force, and the door 48
The closing speed can be adjusted according to the closing operation, and the operation is performed completely without impact.

<< Description of Configuration on Cassette Holder 27 >> FIG. 8 is a view showing the upper surface of the cassette holder 27.

In FIG. 8, leaf springs 64A and 64B for press-contacting the cassette 10 are attached to the left and right of the upper surface of the cassette holder 27, and both end portions of these leaf springs are cassette holders.
The cassette 10 inserted into the cassette holder 27 is pressed against the upper surface of the cassette 10 which is projected downward from the openings 65A, 66A, 65B, 66B formed in the 27, and the cassette 10 is guided by the guide portions 31A, 31B (6th.
(Fig.) Is pressed and held without backlash.

As described above, the slide member 28 has a cassette holding member (chuck link) 43 for chucking the cassette 10.
Is attached via a shaft fulcrum 41, and the slide member also functions as a cassette holding member.

Thus, the slide member 28 has a recess 14 in the cassette 10.
When the cassette holding claw 42 (Fig. 1) is pressed and engaged by the spring 44 (Fig. 13), that is, the cassette 10 is chucked, it comes into contact with the front end surface of the cassette 10 and excessively enters. Stoppers 67A and 67B (Figs. 1 and 6)
Is provided. The stoppers 67A and 67B are formed as an integral projecting portion that is bent downward from the slide member 28. In the illustrated example, the stoppers 67A and 68B are passed through the longitudinal slots 68A and 68B formed in the upper surface of the cassette holder 27.
By projecting A and 67B downward, the structure is such that the operation of pulling in the cassette 10 is not hindered.

<< Description of Shutter Opening / Closing Mechanism >> FIG. 10 shows a shutter 17 for closing the opening 16 of the cassette 10.
FIG. 14 is a partial plan view showing the opening and closing mechanism (FIG. 13) and operation.

In FIGS. 1 and 10, as described above, the guide groove 34C formed in the slide member 28 and having a long hole in the front-rear direction is engaged with the engagement pin 35C planted in the cassette holder 27. Moves relative to the cassette holder 27 in the front-back direction.

A shutter opener 71 is rotatably supported on the slide member 28 via a shaft fulcrum 70. An engagement protrusion 72 that engages with a recess 18 of the shutter 17 that opens and closes the opening 16 of the cassette 10 inserted into the cassette holder 27 and chucked is integrally formed at the tip of the shutter opener 71. .

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

The guide groove 73 is provided when the slide member 28 chucking the cassette 10 with the chuck link 43 moves rearward with respect to the cassette holder 27 by the cassette inserting operation, that is, when the cassette 10 is pulled in, the shutter is released according to the movement. The engaging projection 72 of the opener 71 is moved in the shutter opening direction (left to right) with respect to the slide member 28 (and thus with respect to the cassette 10) (the shutter opener 71 is rotated clockwise). Have

In addition, an opening 74 is formed on the upper surface of the cassette holder 27 for escaping the movement of the engagement protrusion 72 of the shutter opener 71 in the shutter opening / closing direction.

In FIG. 10, the solid line and the chain line show the chucking position (discharging position), and the two-dot chain line shows 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 to the movement of the cassette in the shutter opening / closing direction (left → right) 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 claw portion (engagement protrusion) 72 that engages with 18 is provided, and a mechanism is configured to open and close the opening 16 by moving the shutter 17 in conjunction with pushing (pulling in) and ejecting (ejection) of the cassette 10.

<< Description of Cassette Positioning Mechanism >> FIG. 7 shows a state in which the cassette 10 is mounted, that is, a loading state.

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 10 through the opening 16 (FIGS. 10 and 13). , Information recording (writing) or reading is performed while linearly moving (head feed) from the opening in the front-rear direction.

1 and 7, the base 75 has a cassette
10 (Case 11A, 11B) Positioning pins 76A, 76B, 101
A rotary boss 77 for driving and positioning (height and plane position, parallelism) of A, 101B and the floppy disk 12 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 the z direction (thickness direction of the floppy disk 12) is all (4). The pins 76A, 76B, 101A, and 101B have a structure.

The cassette 10 is moved by the movement of the loading plates 50 and 51 described above.
When is depressed and lowered, first, the recesses 15A, 15B, 15C, 15D (Fig. 13) of the cassette 10 are moved to the pins 76A, 76B,
The hub 13 of the disc 12 (the first
(FIG. 13) contacts the rotating boss 77 to position the cassette 10.

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

The cassette holder 27 and the slide member 28 are engaging cam portions 60A, 60B and 61A, 61B of the loading plates 50, 51.
As a result, it is pulled in slightly downward from the cassette 1 and gaps 78A and 78B are formed between the guide portions 31A and 31B and the cassette 10.

Further, in the mounted state, the cassette 10 has the leaf spring 64
The cassette 10 is pressed downward by A and 64B, so that the cassette 10 is elastically positioned between the leaf springs 64A and 64B and the pins 76A and 76B with a predetermined holding force.

<< Explanation of Door Opening / Closing and Cassette Loading / Discharging Operations >> In FIGS. 1 and 4, the cassette 10 is mounted between the right side plate 26 and the right loading plate 51 by closing the door 48 (the seventh position). Lock and release to return (eject) the cassette 10 to the ejection position by the biasing force of the return springs 61A and 62B of the loading plates 50 and 51. A mechanism 80 is provided.

11 and 12 are a front view and a sectional view (lines A-A and B-B) showing details of the lock-and-release mechanism.
Is.

In FIGS. 1, 4, 11, and 12, a lock link 81 is pivotally supported on the right side plate 26, and the right loading plate 51 is locked and released in cooperation with the lock link 81. Engagement pins 82 are implanted.

In FIG. 11 and FIG. 12, the lock link 81 is
It is attached to the pin 83 planted 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 spring-biased toward the tip end side of the pin 83 by the coil spring 84 fitted to the pin 83.

The lock link 81 is biased by the spring 85 in the direction indicated by the arrow A in FIG. 11, and when the engaging pin 82 does not make any contact, the protrusion 87 collides with the stopper 86 provided on the side plate 26. It is in the initial rotational position in which it hits.

As shown in FIGS. 11 and 12, the lock link 81 is formed of a plate member, and the engagement pin 82 of the loading plate 51 that moves in parallel in the direction of the arrow B first comes into contact with the lock link 81 and the spring 85. A cam portion 88 that presses and slides against the guide groove 89, a lock portion 81 that locks the lock link 81 and the pin 82 in a stable locked state, and a release start portion 91 into which the pin 82 enters when it is pressed twice. A release guide portion 92 is formed which is inclined in the direction shown in FIG. 12 and which is formed so that the pin 82 can ride over it.

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

When the cassette 48 is chucked and the door 48 starts closing, the loading plate 51 and the engaging pin 82 planted therein move in parallel in the direction of arrow B.

When the fixed amount cassette 10 is pushed in, the engagement pin 82 collides with the cam portion 88 of the lock link 81, and the upward component force (first
(Fig. 11) causes the lock link 81 to rotate clockwise (Fig. 11) against the spring 85.

Further, the engaging pin 82 advances, passes through the cam portion 88, and passes through the guide groove.
When reaching the entrance of 89, the lock link 81 is rotated counterclockwise by the spring force of the spring 85 and the engagement pin 82 is locked at the lock position 90.
Be hooked on. Here, the closing operation of the door 48 is stopped.

In this position, a stable locked state is achieved and the return spring 62B
A state in which the loading plate 51, which is spring-biased in the inlet direction (in the left-right direction in FIG. 11) in FIG. 4 and the lock link 81, which is biased counterclockwise in FIG. 11 by the spring 85, are mutually stable. Is engaged and held by.

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

Next, the operation of taking out the cassette 10 will be described.

When the cassette 10 is taken out, it is only necessary to push the door 48 in the closed state in the direction of pushing in (twice).

In FIGS. 11 and 12, the closed door 48 (4th
Pressing) pushes the loading plate 51 back a certain distance against the spring 62B, and the engagement pin 82 is locked.
Depart from 90 and proceed a little further back. When the engagement pin 82 is disengaged from the lock position 90, the lock link 81 is slightly rotated counterclockwise by the spring 85, and the engagement pin 82 comes to the release start portion 91.

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

However, the release guide portion 92 is inclined to a position higher than the contact portion of the engaging pin 82 as shown in FIG. 12 (B), and the lock link 81 itself is a two-dot chain line in FIG. 12 (B). Since it is held so as to be displaceable in the axial direction of the support shaft pin 83, the engagement pin 82 can easily get over the release guide portion 92 by the spring force of the flange 62B, and the left and right loading plates 50, The left and right return springs 61A and 62B are immediately returned to the ejection position (the eject position which is substantially the same as the chucking position when the cassette 10 is inserted).

That is, by simply pushing the door 48, the cassette 10 locked at the mounting position can be released and immediately returned to the discharge position where it can be taken out.

<< Operation of Chuck Link During Ejection of Cassette >> In this case, when the cassette 10 is pulled in and out, the cassette holding claw 42 of the cassette holding member (chuck link) 43 pivotally supported by the slide member 28 is spring-loaded in the recess 14 of the cassette. Since it is performed in a state where it is pressed and engaged by a predetermined amount of spring force by 44, even when releasing the lock and returning the cassette 10 to the ejection position by the spring biasing force as described above, the cassette is held by the acceleration / deceleration operation or impact. It is possible to reliably prevent the claws 42 from coming off the cassette concave portion 14, and therefore it is possible to prevent the cassette 10 from jumping out and dropping from the opening at the time of cassette ejection.

In the above embodiments, the case where the present invention is applied to the loading device of the floppy disk cassette has been illustrated and described, but the present invention can be applied to a cassette such as a video tape cassette, a CD cassette, an audio cassette, etc. in a drive device (mechanism). It can be applied to various cassette loading devices as long as it is mounted on the.

In the above-described embodiment, the cassette holding claw 42 is provided on the chuck link 43 having the rotation fulcrum on the slide member 28, and the chuck link 43 is rotated by the urging force of the spring 44 to lock the cassette 10. As shown in FIG. 14, the chuck link is integrated with the slide member 28, and
It is also possible to form the cassette holding claw 42 in a part thereof by utilizing elasticity (deflection, springiness) of 28 itself.

〔The invention's effect〕

As is clear from the above description, according to the cassette loading device of the present invention, the cassette loading position at which the cassette can be attached to and detached from the device body, and the cassette loading position at which the cassette is loaded at the predetermined loading position in the device body. Cassette holder (2
7), loading means (48, 50, 51) for moving the cassette holder (27) between the cassette ejection position and the cassette loading position, and the cassette holder (27) in the cassette insertion direction. A slide member (28) that is slidable back and forth and is engageable with the loading means (50, 51) and that is moved in the cassette insertion direction by the loading means, and is arranged on the slide member (28). The cassette is inserted into the cassette holder (27) by a predetermined amount to engage and hold the engaging portion of the cassette, and the slide member (28) slides the cassette. A chuck link (43) for pulling the chuck link into the holder, and the chuck link (43) is attached to the cassette holder (27). Is inserted correctly, the inclined surface of the tip of the cassette pushes and moves the cassette to allow the predetermined amount of insertion. The chuck is configured so as to be in contact with the cassette and prohibit the insertion of the predetermined amount of the cassette. Therefore, the chuck that engages with the cassette inserted into the cassette holder by the predetermined amount and pulls the cassette with the loading operation. When the cassette is inserted by mistake using the link, it is possible to always load the cassette accurately by prohibiting the cassette from being held by the chuck link, and a mechanism for preventing the cassette from being inserted incorrectly. By realizing a precise loading operation with a common mechanism without separately providing a drawing mechanism for the cassette and the cassette Provided is a cassette loading device in which the operation timing of each mechanism is accurate, the number of parts, the required space can be reduced and the configuration can be simplified.

[Brief description of drawings]

FIG. 1 is a plan view showing a main portion of a cassette loading device according to the present invention in a state in which a left half portion is in a discharge position and a right half portion is in a mounting position, and FIG. Left side view with parts removed, FIG. 3 is a left side view from which another portion seen from line II-II in FIG. 1 is deleted, and FIG. 4 is line IV- in FIG.
Partially deleted right side view seen from IV, Fig. 5 is line IV in Fig. 1
Fig. 6 is a right side view with other portions removed from Fig. IV, Fig. 6 is a cross sectional view taken along the line VI-VI in Fig. 1, and Fig. 7 is a vertical sectional view showing the cassette mounted state. 1 is a plan view of the cassette holder shown in FIG. 1, FIG. 9 is a front view showing a cassette insertion opening of the cassette loading device shown in FIG. 1, and FIG. 10 is a shutter opening / closing mechanism for the cassette shown in FIG. 11 is a partial plan view showing the mechanism and operation, FIG. 11 is a partial front view of the lock-and-release mechanism of the cassette in FIG. 1, and FIGS. 12A and 12B are lines A- in FIG. 11, respectively. A, line B-
FIG. 13 is a partial sectional view taken along the line B, FIG. 13 is a bottom view of a cassette used in the cassette loading device of FIG. 1, and FIG. 14 is a plan view partially showing a main part of another embodiment of the present invention. is there. 10 ... Cassette, 14 ... Recessed part (chucking), 17 ...
… Shutter (cassette), 19 …… Inclined surface (prevents incorrect insertion), 27 …… Cassette holder, 28 …… Slide member,
33A, 33B …… Guide groove (for cassette holder), 37A, 3
7B: Guide groove (for slide member), 42: Cassette holding claw, 43: Chuck link, 48: Door, 50, 51 ...
Loading plate, 60A, 60B, 61A, 61B ... Leaf spring (cassette holder), 67A, 67B ... Stopper (slide member), 72 ... Engaging protrusion (shutter opening / closing), 73 ...
… Cam groove (shutter open / close), 80 …… Lock and release mechanism, 81 …… Lock link, 82 …… Engagement pin.

Claims (1)

[Claims] 1. A cassette movably supported between a cassette discharge position at which the cassette can be attached to and detached from the apparatus main body and a cassette loading position at which the cassette is loaded at a predetermined loading position in the apparatus main body. A holder (27), a loading means (48, 50, 51) for moving the cassette holder (27) between the cassette ejection position and the cassette loading position, and insertion of a cassette on the cassette holder (27). And the loading means (50, 5)
1) a slide member (28) arranged to be engageable with the slide member and moved by the loading means in the cassette insertion direction; and a slide member (28) arranged on the slide member (28) and arranged in the cassette holder (27). A chuck link (43) for engaging and holding the engaging portion of the cassette by inserting a predetermined amount of the cassette and pulling the cassette into the cassette holder by the sliding operation of the slide member (28). ) And the chuck link (43) is pushed and moved by the inclined surface of the cassette tip when the cassette is correctly inserted into the cassette holder (27), and thereby the predetermined amount of the cassette When the cassette is inserted by mistake, and the cassette is erroneously inserted, the cassette is brought into contact with the front end of the cassette and the predetermined amount of the cassette is inserted. Cassette loading apparatus characterized by being configured so as to prohibit.