JPH0770130B2 - Cassette loading device - Google Patents

Description

[Field of Industrial Application] 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, when the cassette inserted by a certain depth from the opening is chucked by the cassette holding member (chuck link) and the drawing operation of the cassette is performed, the cassette ejecting position ( A method is adopted in which a cassette holding claw which receives a biasing force such as a spring is hooked in a chucking concave portion of the cassette at a chucking position) and is pulled inward by a drive device.

At that time, at the discharge position, the latching of the cassette holding claw to the chucking recess of the cassette is required to be strong enough to exert a sufficient holding force against the pulling operation of the cassette. It is necessary that the chucking concave portion of the cassette be configured to be smoothly extracted from the cassette holding claw at the position where the cassette is inserted and extracted.

However, in the conventional cassette loading device,
If the biasing force of the spring and the shape of the cassette holding claw are set so that the cassette can be pulled out smoothly in order to satisfy the latter requirement, the holding force will be insufficient when the cassette is pulled in, and vibration and shock during operation will be reduced. On the other hand, there was a problem that it became unstable and easy to leave.

[Means for solving problems]

The present invention has been made in view of the above-mentioned problems of the prior art, and secures chucking at the time of retraction operation without impairing the insertion / removal property at the ejection position of the cassette (the property that allows smooth insertion and removal),
An object of the present invention is to provide a cassette loading device capable of stably performing a pulling-in operation with a sufficient holding force against vibration and impact.

According to the present invention, there is provided a cassette holder movably supported between a cassette ejection position for ejecting a cassette from an apparatus main body and a cassette loading position for loading the cassette at a predetermined loading position in the apparatus main body, At the cassette ejecting position, an engaging portion is formed that can engage with a concave portion formed in the cassette inserted into the cassette holder by a predetermined amount, and abuts on the cassette to engage the engaging portion with the concave portion. The cassette holding member that is biased by a spring in the direction and movable in the cassette insertion direction, and the cassette holding member is engaged with the concave portion of the cassette by the operation of further inserting the cassette The cassette holding member is prevented from moving in the direction in which the engaging portion of the cassette holding member is disengaged from the recess by engaging with the member. A guide portion for, by a cassette loading apparatus characterized by having a one in which to achieve the above object.

〔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 view which was deleted.

FIG. 6 is a cross-sectional view of the door, which is partially omitted when seen from 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 vertical 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 and slides on the side surface of the cassette 10.

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 48 which rotates around a shaft fulcrum 47. (See FIG. 4).

On the other hand, the left and right side plates 25 and 26 of the cassette loading device are moved in the front-rear direction according to the opening / closing operation of the door 48.
0 and 51 are 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 links 53A and 53B is rotatably connected to each of the above, and the other ends of these door links 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 respective 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 upper surface of the cassette 10 inserted into the cassette holder 27 is pressed to protrude downward from the openings 65A, 66A, 65B, 66B formed in the 27, and the cassette 10 is guided by the guides 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 stopper 67A is passed through front and rear elongated holes 68A and 68B formed on 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 an opening / closing mechanism (FIG. 13) and its 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 cam groove 73 that engages with an engagement pin 35C implanted in the cassette holder 27.

The cam groove 73 is provided with a shutter according to the movement of the slide member 28 chucking the cassette 10 by the chuck link 43 when the slide member 28 moves rearward with respect to the cassette holder 27 by the cassette inserting operation, that is, when the cassette 10 is pulled in. 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.

In FIGS. 4 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 define

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 drawn in slightly downward from the cassette 10 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, Cassette Loading, and Ejecting 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 the cassette 10 by the movement of pushing the door again, and return (eject) the cassette 10 to the ejection position by the biasing force of the return springs 62A, 62B of the loading plates 50, 51. A release 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. 1, 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 that 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
11) causes the lock link 81 to rotate clockwise (in FIG. 1) against the spring 85.

Further, the engaging pin 82 advances and passes through the cam 88 to guide the guide groove 89.
When it reaches the entrance of the lock pin 81, 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. 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 biased toward the inlet (to the left 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 to push it further (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 spring 62B, and the left and right loading plates 50, The spring force of left and right return springs 62A and 62B immediately returns 51 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. It can be applied to various cassette loading devices as long as it is mounted on the.

<< Explanation of Detachment Prevention Mechanism of Chuck Link >> FIG. 14 is a partial plan view showing a chucking disengagement prevention mechanism and a loading start prevention mechanism which are composed of the cassette holding member (chuck link) 43 and the cassette holder 27.

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

However, the guide groove 97 is provided with a regulation guide portion 97A that slidably engages with the engagement protrusion 43A and prevents the cassette holding member 43 from rotating in the clockwise direction during the cassette retraction operation.

The regulation guide portion 97A has a shape that prevents rotation of the cassette holding member 43 in the chucking disengagement direction during the cassette retraction operation and allows chucking disengagement at the discharge position. Member 43
The cam means for restricting the rotation restriction of is constituted.

That is, the cassette 10 inserted to the cassette ejection position is locked in the recess 14 by the cassette holding claw 42 of the cassette holding member (chuck link) 43 which receives the biasing force of the spring 44 (FIG. 1), and chucking is performed. Then, when the door 48 (FIG. 1) is started to be closed from this chucking state, the drawing operation of the cassette 10 starts.

At this time, the cassette holding member 43 moving rearward is rotated clockwise (outward) in FIG. 1 during the retracting operation due to the engagement between the engaging projection 43A and the regulation guide portion 97A of the guide groove 97. Therefore, the cassette holding claw 42 cannot be disengaged from the chucking recess 14 of the cassette 10.

Further, in FIG. 14, in the guide groove 97 of the cassette holder 27, when the cassette holding claw 42 does not engage with the chucking concave portion 14 of the cassette 10 and rides on the end surface of the cassette 10, that is, 14 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 the figure,
An abutting portion 97B is provided which prevents the cassette retracting operation by colliding with the engaging protrusion 43A.

As a result, unless the engaging protrusion 43A of the chuck link 43 is securely engaged with the recess 14 of the cassette, the cassette loading operation will not be performed.

This abutting portion 97B is the engaging projection 43A of the cassette holding member 43.
And a loading start prevention mechanism in cooperation with the above.

That is, when the inserted cassette 10 is not in the regular ejection position, the chucking recess 14 of the cassette 10 is not locked 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 rotated slightly clockwise from the normal position (solid line) as shown by the two-dot chain line, that is, the engaging protrusion 43A is the cassette holder. It is in a position where it abuts against the contact portion 97B of 27 and is stopped.

That is, even if the loading operation (the operation of closing the door 48) is performed in the state where the cassette 10 is not in the regular ejection position, the entire mechanism is locked by the collision between the engagement projection 43A and the contact portion 97B, and the regular mechanism is locked. The slide member 28 cannot be moved rearward (toward the back) unless the cassette is reinserted into the position,
The start of loading is blocked.

Thus, in a state where the chucking concave portion 14 provided in the cassette 10 is not locked by the cassette holding claw 42 of the cassette holding member 43, a part of the cassette holding member 43 (engagement protrusion 43A) is a fixing member (cassette 43A). Holder 27) abutment 9
A cassette loading device that prevents the start of loading by being in contact with 7B is configured.

<< Description of Head Mechanism >> FIG. 15 is a left side view of the periphery of the head in FIG.

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

In FIG. 1, the head holding member 93 is a guide groove 93A, 93B.
It is arranged so as to be slidable forward and backward by the guide pins 35A and 35B of the cassette holder 27, and is biased forward by a spring 95.

The head holding member 93 includes head holding portions 93C and 93D (first
Figure, Figure 15).

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

A cassette that moves backward when the loading operation is started from the ejection position shown in FIG. 1 when the cassette is inserted.
The front end portion of 10 pushes the cassette contact pin 94 of the head holding member 93 to move the head holding member rearward by an amount substantially the same as the moving amount of the cassette 10.

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

Incidentally, the head holding member 93 is provided with two head holding portions 93C and 93D having different heights as shown in FIG.
The head holding portion engaging portion 99A of 9 is engaged, and the other holding portion 93D is engaged with the engaging portion 99A when the cassette is inserted (at the mounting position).

At the time of loading while inserting the cassette, the head holding portion 93D of the head holding member 93 formed at substantially the same height as the holding portion of another head holding member (formed on the cassette holder 27) formed on the right side of the head, When the cassette (cassette holder 27) is lowered and mounted, the head holding portion engaging portion 99
The contact with A is released, and the upper head 100B is pressed against the disk 12.

On the other hand, when the loading operation is performed without inserting the cassette, the head holding member 93C of the head holding member 93 formed at a position higher than the holding portions of the other head holding members,
The head support member (head arm) is held at a position where the head is not yet in pressure contact with the cassette lowered and mounted, and the head or pad is not in pressure contact when the disk is not used.

<< Explanation of Door Opening Prohibition Mechanism >> FIGS. 16 to 19 are views showing a door erroneous opening prevention mechanism of the recording / reproducing apparatus according to the present invention, and FIG. 16 is a front view of a state in which the door can be opened, FIG. 17 is a plan view of FIG.
FIG. 18 is a front view showing a state in which the door cannot be opened (a state in which the erroneous opening prevention mechanism is operating), and FIG. 19 is a plan view of FIG.

Referring to FIGS. 16 to 19, the front panel 46 having an opening 45 (FIG. 9) such as a cassette insertion opening of a recording / reproducing apparatus for driving a recording / reproducing medium such as an optical disk or a video cassette is re-locked from the locked state. A door 8 that is opened by pressing and a door opening preventing member 96 having a door opening preventing claw 96C are provided. By operating the door opening preventing member 96, a pressing force for unlocking the door 48, that is, the cassette 10 is provided. An erroneous door opening prevention mechanism is provided so that it can be set in a state in which the eject operation is blocked.

In FIG. 16 to FIG. 19, the door opening prevention member 96 is the door 48.
Versatile with respect to sliding up and down, ie in the example shown the door
It is assembled so that it can move up and down along the guide groove 48A provided on the 48, and the door lock pawl 96C formed on the upper end portion of the door opening prevention member 96 at the raised position has the upper end opening window 48C formed on the door 48. It is designed to project upward from.

The door opening preventing member 96 is movably attached with a click feeling between the door opening (ejectable) position shown in FIGS. 16 and 17 and the door unopening position shown in FIGS. 18 and 19. There is.

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

At the door openable position where the door opening prevention member 96 is lowered as shown in FIGS. 16 and 17, the cassette is operated by pressing the door 48 as described in the ejecting operation of the cassette 10 described above. You can eject 10 to the spit position.

The vertical movement of the door opening prevention member 96 is performed by manually operating the door lock knob 96A provided on the member.

In the illustrated example, the click action of the door opening prevention member 96 in this case is performed by the lock pin 48B provided on the door 48 and the spring type lock pin engagement portion 96 provided on the door opening prevention member 96.
This is realized by push-engagement with B and pull-out withdrawal, and this click-action type engagement / disengagement causes the door opening prevention member 96 to move to either the raised position (door opening prevention position) or the lowered position (door openable position). Crab is surely retained.

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

In the illustrated embodiment, the present invention is applied to a structure in which the chucking of the cassette 10 is carried out at one location on the left side (FIG. 1), but the present invention applies the chucking recesses 14 to the left and right sides of the cassette 10. The present invention can be similarly implemented in a cassette loading device having a structure in which the two are provided and chucked by the two cassette holding members (chuck links) 43 on the left and right, and the same effect can be achieved.

〔The invention's effect〕

As is clear from the above description, according to the cassette loading device of the present invention, the cassette ejection position for ejecting the cassette from the device body and the cassette loading position for loading the cassette at a predetermined loading position in the device body. A cassette holder (27) that is movably supported between
At the cassette ejection position, an engaging portion (42) is formed which can engage with a recess (14) formed in the cassette inserted into the cassette holder (27) by a predetermined amount, and the engaging portion (42) A cassette holding member (43) which is biased by a spring in a direction in which the cassette is brought into contact with the concave portion (14) so as to be engaged with the concave portion (14) and is movable in the cassette insertion direction; The engaging portion (42) of the cassette holding member (43) is engaged with the cassette holding member (43) by the operation of further inserting the cassette in the state of being engaged with the concave portion (14) of Is the recess (1
4) The cassette holding member (4
The guide part (97A) that prohibits the movement of 3) is provided, so that the cassette holding claw is prevented from coming off from the chucking recess of the cassette during the cassette retracting operation, and a reliable retracting operation is performed. A cassette loading device is provided.

[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. 2 is a view seen from a line II in 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 the line in Fig. 1.
FIG. 6 is a right side view showing another portion as seen from IV-IV, FIG. 6 is a transverse sectional view taken along line VI-VI in FIG. 1, and FIG. 7 is a longitudinal sectional view showing a cassette mounted state. 8 is a plan view of the cassette holder in FIG. 1, FIG. 9 is a front view showing a cassette insertion opening of the cassette loading device in FIG. 1, and FIG.
FIG. 11 is a partial plan view showing 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 FIG. (B) are lines AA and B- in FIG. 11, respectively.
FIG. 13 is a partial cross-sectional view taken along B, FIG. 13 is a bottom view of the cassette used in the cassette loading device of FIG. 1, and FIG. 14 is a mechanism for preventing the chucking disengagement and the loading start control in FIG. 15 is a left side view around the head in FIG. 1, FIG. 16 is a front view of the door erroneous opening prevention mechanism in FIG. 1 when the door can be opened, and FIG.
FIG. 18 is a plan view of the figure, FIG. 18 is a front view of the door erroneous opening prevention mechanism when the door cannot be opened, and FIG. 19 is a plan view of FIG. 10 …… Cassette, 14 …… Chucking recess, 27 …… Cassette holder, 28 …… Slide member, 42 …… Cassette holding claw, 43 …… Cassette holding member (chuck link),
43A ... Engaging protrusion, 44 ... Cassette holding member (chuck link), 45 ... Opening part, 46 ... Front panel, 48 ...
… Door, 50, 51 …… Loading plate, 80 …… Lock and release mechanism, 96 …… Door opening prevention member, 96C
…… Door open prevention claw, 97 …… Guide groove, 97A …… Restriction guide part, 97B …… Abutment part.

Claims (1)

[Claims] 1. A cassette holder (27) which is movably supported between a cassette ejection position for ejecting a cassette from an apparatus body and a cassette loading position for loading the cassette to a predetermined loading position in the apparatus body. ) And an engaging portion (42) which is engageable with a recess (14) formed in the cassette inserted into the cassette holder (27) by a predetermined amount at the cassette ejecting position. A cassette holding member (43) which is biased by a spring in a direction in which it abuts on the cassette so as to engage the (42) with the recess (14) and is movable in the cassette insertion direction, and the cassette holding member (43). When the cassette is engaged with the recess (14) of the cassette, the cassette is further inserted to engage with the cassette holding member (43) and the engaging portion of the cassette holding member (43). (Four 2. A cassette loading device, comprising: a guide portion (97A) for inhibiting movement of the cassette holding member (43) in a direction in which 2) separates from the recess (14).