JPS61276161A - Cassette loading device - Google Patents

Abstract

PURPOSE:To prevent the misloading of a cassette and at the same time to simplify the structure of a cassette loading device, by providing movably a release member to a tray to release the lock state of a cassette lid. CONSTITUTION:A release member 11 is provided movably to a tray 6 to release the lock state of a lid 7 of a cassette 9. An actuating member 17 is set between the 1st position where the cassette 9 set on the tray 6 is loaded and unloaded and the 2nd position where the recording/reproducing operations are carried out. Here it is avoided that the tray 6 actuates a lock release projection part 13 of the cassette 9 put on the tray 6. Then the member 11 is moved to the tray 6 by means of the member 17 when the tray 6 is moved up to the 2nd position. Thus the part 13 of the cassette 9 put on the tray 6 is actuated. At he same time, the lid 7 is opened by the member 17.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cassette loading device in, for example, a video or audio cassette tape recorder.

[Summary of the invention]

The present invention has a first position where a cassette is placed which houses a magnetic tape and whose lid is normally closed, and a first position where the cassette is installed and removed, and a first position where the lid is opened and the magnetic tape is opened for recording and playback. In a cassette loading device that includes a tray that is moved between a second position where the cassette is exposed and a second position where the cassette is exposed, a release member that unlocks the lid of the cassette is movably provided on the tray, and the cassette placed on the tray is An operating member is provided between the first position and the second position, and when the tray is in the first position, the release member does not operate the unlocking protrusion of the cassette placed on the tray. , when the tray moves to the second position, the first actuating member moves the release member relative to the tray, operates the unlocking protrusion of the cassette placed on the tray to release the lock, and the actuating member If a cassette is placed in an abnormal state, the lid will be opened, and if a cassette is placed in an abnormal state, the user will be notified of the abnormality and movement of the tray will be prohibited, which will not only prevent incorrect loading but also reduce the number of parts. This makes it possible to reduce the size and cost of the device.

[Conventional technology]

Video tape cassettes generally have a lid that is normally opened and locked, and the magnetic tape stored inside is not exposed unless the lock is released and the lid is opened. ing. Therefore, when a cassette is installed in a magnetic recording/reproducing apparatus, it is necessary to unlock the lid and open the lid, and various devices have been proposed for this purpose.

[Problem that the invention seeks to solve]

However, in such conventional devices, when the cassette is inserted into the cassette holder and the lid is unlocked, the upper part of the cassette is held down by the cassette holder, so it cannot be applied to a tray system that does not have a cassette holder. It was difficult.

In particular, for small cassettes such as so-called 8m video tape cassettes whose lids are unlocked from below, they tend to float up due to the reaction force of springs that bias the lid when the lock is released, so a tray system without a cassette holder is used. I couldn't do much. Further, even if a cassette is mistakenly set in a magnetic recording/reproducing apparatus, the incorrect setting cannot be detected until after the loading of the cassette has started, and there is a risk of damaging the cassette.

[Means for solving problems]

1 to 11 all show the configuration of the cassette loading device of the present invention. In these figures, 1 is a casing, and an opening 2 is formed in the front of the casing. The opening 2 is closed or opened by a door 4 which is rotatable outward and downward about a fulcrum 3. 5 is a spring that always biases the door 4 in the direction of closing it.

Reference numeral 6 denotes a tray, which can be moved forward and backward from the opening 2. The tray 6 is provided with a recess 10 on which a cassette 9 having a lid 7 that is rotatable about a fulcrum 8 can be placed therein so as not to fall off. Reference numeral 11 denotes a release member, which has a bent portion 12 at its tip and a protrusion 13 approximately at its center, and is provided so as to be movable (slidable in the embodiment) on the tray 6. Reference numeral 14 denotes a spring, which constantly urges the release member 11 inward (leftward in FIG. 1). 15 is a notch for movably projecting the protrusion 13 of the release member 11 into the recess 10 of the tray 6 (Fig. 8); 16 is a notch provided on the tray 6 so as to be rotatable about a fulcrum 17; plate and cassette 9
The inner side of the recess 10 (
The left side in FIG. 1 can be placed in a closed position or in an open position. 18 is an actuating member, and when the tray 6 moves inside the housing 1, its side surface can come into contact with the bent part 12 of the release member 11, and its upper surface can come into contact with the lower ends of the lid 7 and the plate 16. It becomes. 19 is a pin implanted in the tray 6, and 20 is a long hole formed in the release member 11. The pin 19 is fitted into the long hole 2o to guide the movement of the release member 11.

Of course, the formation positions of the pin 19 and the elongated hole 2o may be reversed.

Reference numeral 21 denotes guide plates provided on the left and right sides of the housing 1, and a guide hole 22 has a horizontal portion and a vertical portion that are parallel to each other.
and 23 are formed. Pins 24 and 25 are implanted in the tray 6, and are fitted into guide holes 22 and 23, respectively, to guide the tray 6 in the horizontal and vertical directions. Reference numeral 26 denotes a rack plate disposed on the outside of the left and right guide plates 21, which includes guide holes 27 and 28 parallel to each other and inclined downward at approximately 45 degrees, and an inclined portion inclined upward at approximately 45 degrees. Guide holes 29 each having a horizontal portion are formed. 31 is guide plate 2
1, and is fitted into the guide hole 29 to guide the movement of the rack plate 26. Reference numeral 32 denotes an arm, which is rotatable around a fulcrum 33 provided on the guide plate 21. A pin 34 is implanted at one rear end of the arm 32, and is fitted into the guide hole 29 of the rack plate 26. 35
is a vertically movable ramp, and has pins 37 fitted into elongated holes 36 formed in the guide plate 21 on its left and right sides.

A spring 38 has one end fixed to the clamper 35 and the other end fixed to the arm 32, and is always biased so that the clamper 35 (its pin 37) comes into contact with the upper end of the arm 32.

Reference numeral 41 denotes a motor, and its rotation rotates the phase shaft 43 via a deceleration mechanism 42 . Phase axis 43
Phase gears 44 are provided at both ends of the rack plates 26, and mesh with racks 45 formed at the lower ends of the left and right rack plates 26, so that the left and right rack plates 26 move synchronously.

46 is a clutch provided on the phase shaft 43, which causes slippage when a load of a predetermined value or more is applied to the guide plate 26.

51 and 52 are switches installed separately at the rear and front of the housing 1, and when the rack plate 26 moves to a predetermined position, they are pressed by their projections 53 and are activated (
(on or off).

[Effect]

The effect will now be explained. First, when loading the cassette 90, 1, for example, operate an eject switch (not shown) to energize the motor 41, and cause the tray 6 to protrude outside from the opening 2 of the housing 1 (FIGS. 6, 7, and 7). Figure 8)
, in such a state, hold the cassette 9 in your hand and place it on the tray 6.
It is placed in the recess 10 of. Since the recess 10 is formed to have approximately the same size as the outer shape of the cassette 9, the cassette 9 can be set approximately at a predetermined position. Further, at this time, the plate 16 closes one side surface (the side surface on the opening 2 side) of the recessed portion 1°. Therefore lid 7
The cassette 9 is brought into contact with the cassette 9 and its position is regulated, so that there is no risk that the cassette 9 will fall out of the opening 2 or be incorrectly inserted, as shown by the two-dot chain line in FIG. 12(d). Also, Figure 12(b)
, (Q), even if the cassette 9 is placed with its tip facing upward or downward, as shown by the two-dot chain line, it will be guided to a normal state as shown by the solid line. In this way, it is not only a simple operation of simply placing the cassette 9, but also the plate 16 guides the cassette 9 even if the cassette 9 is placed in a different direction. Even if the door 4 is opened in the upward direction and the tray 6 is ejected from the opening 2, the opening 2 can be substantially closed. Insertion of foreign objects is prevented.

As shown in FIGS. 10 and 11, a protrusion 62 that is operated to unlock the lid 7 is formed on the lower left side of the cassette 9, and a space 61 is formed in front of the protrusion 62. When the cassette 9 is correctly placed in the recess 10 of the tray 6, the protrusion 13 of the release member 11 will fit into this space 6.
．． 1. At this time, the release member 11 is urged inward (to the right in FIG. 8) by the spring 14 to a position where the outer end of the elongated hole 2o abuts the pin 19 of the tray 6. is cassette 9
(Fig. 10), so that the lid 7 is opened when the cassette 9 is placed in the recess 1o, and the magnetic tape is damaged. is prevented. In addition, as in the case where the release member 64 is fixed to the tray 6, the release member 64 is attached to the protrusion 6.
1, and the lock cannot be unlocked (Fig. 5(d)).

On the other hand, such a space 61 is not formed in the force set 9 except in the front of the lower left side thereof, so that the cassette 9 can be moved forward or backward (FIG. 13(a)).

If the top and bottom surfaces are reversed (FIG. 13(b)) and the cassette 9 is not placed correctly, one of the parts of the cassette 9 may end up on the protrusion 13 that protrudes from the notch 15 into the recess 10. At a glance, the user can see that the item has been lifted up or placed incorrectly.

If the user does not notice this and performs an operation to accommodate the tray 6 inside the opening 2 as described later.

Any part of the cassette 9 is located on the outer periphery of the opening 2 in the housing 1
, and the tray 6 is no longer accommodated inside. Also, when the cassette 9 is mounted in the recess 10 with the plate 16 rotated upward and the loading operation is performed,
The plate 16 collides with the outer peripheral wall of the opening 2. At this time, since a load greater than a predetermined value is applied, the clutch 46 operates, thereby preventing damage to the cassette 9 and the like.

If the tray 6 cannot be accommodated within a predetermined time after the start of the operation, a microcomputer or the like (not shown) detects this as some kind of abnormality and ejects the tray 6. Therefore, the cassette 9 will not be housed inside the device in an abnormally set state.

As shown in FIG. 5(a), when the cassette 9 is correctly installed, the motor 41 is energized by operating, for example, a start switch (not shown) or the like. Alternatively, if the tray 6 is slightly pressed inward, the protrusion 53 will separate from the switch 52.
After detecting this, the motor 41 may be energized from then on.The rotation of the motor 41 is transmitted to the phase shaft 43 via the deceleration mechanism 42, and therefore to the phase gears 44 at both ends. Since the left and right rack plates 26 are engaged with each other, the left and right rack plates 26 move backward. Since the pins 24.25 are pressed against the outer inclined surfaces of the guide holes 27.28, the pins 24.25 are guided by the horizontal portions of the guide holes 22.23, and the tray 6 moves horizontally in parallel (retreats).

When the tray 6 retreats to a predetermined position, the door 4, which had been pressed by its lower surface, rotates upward about the fulcrum 3 due to the biasing force of the spring 5, and stops at a position where it abuts a stopper (not shown). Opening 2 is closed.

When the pins 24 , 25 are near the end of the horizontal portion of the guide hole 22 , 23 , the side surface of the actuating member 18 comes into contact with the bent portion 12 of the release member 11 . Therefore, the release member 11 is prevented from moving backward and stops there.

On the other hand, when the trailer further retreats, the protrusion 13 moves within the notch 15 and presses the protrusion 62, and the lid 7 is unlocked (FIG. 5(b)).

When the rack plate 26 retreats to the position where the protrusion 13 abuts the protrusion 62, the pins 24 and 25 are inserted into the guide hole 22.
．． It will be located at the vertical part of 23. As a result, when the rack plate 26 is further retreated, the pins 24.25, and therefore the tray 6, are guided by the vertical portions of the guide holes 22.23 and descend substantially vertically. When the tray 6 reaches the lowered position, the lower ends of the lid 7 and the plate 16 are positioned above the actuating member 18. Therefore, when the tray 6 is lowered, the lid 7 and the plate 16.

The lower ends thereof are pressed against the upper surface of the actuating member 18, and they rotate together upwardly about the fulcrums 8 and 17, respectively.

At this time, the bent portion 12 of the release member 11 descends along the side surface of the operating member 18, so the protrusion 62 is pressed by the protrusion 13, and the unlocked state is maintained (FIG. 5(c)). , as a result, the magnetic tape 6 housed inside
3 (FIG. 10) is exposed to the outside, and can be pulled out from the cassette 9 by means not shown if necessary.

On the other hand, when the rack plate 26 is retracted to a predetermined position, the pin 34 is guided from the horizontal part of the guide hole 29 to the inclined part. As a result, the pin 34 starts to move upward, and the arm 32 rotates about the fulcrum 33. Since the pin 37 is in contact with the upper end of the arm 32 due to the urging force of the spring 38 (FIG. 9), the clamper 35 having the pin 37 is lowered together with the arm 32. Therefore, at this time, the biasing force of the spring 38 does not affect the rotational force of the arm 32. At this time, since the plurality of pins 37 are guided by the plurality of elongated holes 36, the clamper 35 stably descends substantially horizontally. When the arm 32 further descends, the clamper 35 comes into contact with the upper surface of the cassette 9 placed on the tray 6 and presses and clamps the cassette 9 onto the tray 6.

After the tray 6 has descended to the lowest predetermined position, when the arm 32 further descends, the upper end of the arm 32 touches the pin 37.
and the spring 38 is expanded (FIG. 3). Therefore, from this point on, the rotational force of the arm 32 requires a component that resists the biasing force of the spring 38, but the cassette 9 is reliably clamped by the biasing force of the spring 38.

The pivot point 33 of the arm 32 is a pin 34 as a driving point.
Although it can be located further inside (on the right side in FIG. 2), it is better to locate it between the point where the clamper 35 is actuated via the spring 38 and the pin 34 as in the embodiment, because the length of the arm 32 is smaller. can be made shorter,
It is advantageous for downsizing.

In the above description, the pins 31 and 34 are guided or driven by the same guide hole 29.
At least its horizontal portion can also be an independent guide hole dedicated to each bin. However, if the horizontal portions of the guide holes are shared as in the embodiment, it is not only easier to manufacture the rack plate 26, but also the height can be lowered, which is advantageous for making the device thinner. Furthermore, since the inclined portion of the guide hole 29 that drives the pin 34 and the guide holes 27 and 28 that drive the pins 24 and 25 are inclined in opposite directions, when the tray 6 and the clamper 35 are moved up and down, The reaction force applied to the rack plate 26 by the pin 34 and the reaction force applied to the rack plate 26 by the pins 24, 25 are in opposite directions, and the couple forces that try to rotate the rack plate 26 cancel each other out. Furthermore, even if an uncancelled component remains and a rotational force centered on the phase gear 44 acts on the rack plate 26, the pin 31 is located almost directly above the phase gear 44 as a drive source, so the phase There is little risk that the gear 44 will separate from the rack 45. Therefore, the rack plate 26 is guided by the pin 31 fitted into the guide hole 29, and its movement can be stabilized. Pins 24 and 25 are in guide holes 22 and 23
The rotation of the rack plate 26 when the pin 34 is moving in the horizontal part of the guide hole 29 causes the pin 37 to come into contact with the upper end of the elongated hole 36, and the pin 34 is moved further downward. This can be prevented by making it impossible to move, or by keeping the pins 24.25 in contact with the upper ends of the guide holes 27.28.

When the rack plate 26 retreats to a predetermined position, the voice starter 53 presses the switch 51 to operate it.

Therefore, the power to the motor 41 is removed and the rack plate 26 is stopped. At this time, the spring 38 is expanded and a biasing force is generated, and the clamper 35 uses this biasing force to clamp the cassette 9 at the recording/reproducing position, and the loading of the cassette 9 is completed.

In this state, information is recorded or reproduced on the magnetic tape 63.

Next, the unloading operation will be explained.

When an eject switch (not shown) or the like is operated, the magnetic tape 63 is housed inside the cassette 9, and the motor 41 is energized and rotated in the opposite direction to that during loading. As a result, the rack plate 26 moves forward, the pin 34 is guided by the guide hole 29 and descends, and the arm 32 rotates in the opposite direction to that described above. When the spring 38 is compressed by its own biasing force and the upper end of the arm 32 comes into contact with the pin 37, the clamper 35 then moves up integrally with the arm 32.

As the rack plate 26 moves forward, the guide holes 27 and 28
The pins 24 and 25 are pressed by the inner inclined surface of the lid 7, and thus the tray 6 rises. Although not shown, the lid 7
is constantly biased in the closing direction by a spring housed inside. In addition, the position of the fulcrum 17 is set offset from the center of gravity so that the plate 16 always rotates in the direction of closing due to its own weight (of course, the number of parts and the installation space may increase. Therefore, when the tray 6 rises, the lid 7 rotates due to the biasing force of the spring, and the plate 16 rotates due to its own weight, thereby closing the cassette 9 or the recess 10.

When the rack plate 26 advances to a predetermined position, the pin 2
4.25 is guided by the horizontal part of the guide hole 22.23,
Tray 6 moves horizontally. At this time, the door 4 is pressed by the front end and lower end of the tray 6, and the door 4 is rotated downward and outward about the fulcrum 3 against the biasing force of the spring 5, and the opening 2 is opened. Although the door 4 can be rotated upward, it is preferable that the door 4 be rotated downward when opening, since this may interfere with the operation of attaching and detaching the cassette 9. In addition, if the device is rotated inward, it becomes necessary to secure space for the rotation, which not only increases the size of the device, but also allows it to be opened simply by pressing inward, making it susceptible to mischief by children. It becomes easier. Therefore, it is preferable to open it by rotating it downwardly and outwardly. When the tray 6 is ejected from the opening 2 and reaches a predetermined position, the protrusion 53 operates the switch 52.

The motor 41 is de-energized and the unloading operation is completed.

〔effect〕

As described above, the present invention has two positions: a first position where a magnetic tape is housed, a cassette with a lid normally closed, and a first position where the cassette is attached/detached and a position where the lid is opened for recording and reproduction. A cassette loading device that includes a tray that is moved between a second position and a second position where a magnetic tape is exposed. An actuating member is provided between the first position and the second position, and when the tray is in the first position, the release member operates the unlocking protrusion of the cassette placed on the tray. When the tray moves to the second position, the actuating member moves the release member relative to the tray, operates the lock release protrusion of the cassette placed on the tray, and releases the lock. .

Since the lid is opened by the actuating member, if the cassette is placed in an abnormal state.

Not only can it notify the user of an abnormality and prevent tray movement by preventing incorrect installation, but it also reduces the number of parts and simplifies the structure, making the device more compact and lower in cost. be able to.

Therefore, it is particularly effective in 8m video tape recorders and the like.

[Brief explanation of drawings]

Fig. 1 is a left side view of the cassette loading device of the present invention in a state in which a cassette is accommodated, Fig. 2 is a right side view thereof, Fig. 3 is a front view thereof, Fig. 4 is a plan view thereof, and Fig. 5 is a 6 is a left side view with the cassette ejected, FIG. 7 is a right side view, FIG. 8 is a plan view, and FIG. 9 is a front view. Fig. 10 is a partial sectional view of the cassette, Fig. 11 is a partial perspective view thereof, Fig. 12 is a right side view for explaining its action, and Fig. 13 is a left side view for explaining its action. . 1... Housing 4... Door 5.14.38... Spring 6... Tray 7... Lid 9... Cassette 10... Recessed part 11... Release member 12 Bending part 13.53.62... Projection 15... Notch 16... Plate 18... Operating member 21... Guide plate 22.23.27.28.29... Guide hole 24.2
5.31, 34.37... Pin 26... Rack plate 32... Arm 35... Clamper 43
...Phase axis 44...Phase gear 45...Rack 51.52...Switch 61...Space part 63...More than magnetic tape

Claims (1)

[Claims] A cassette that houses a magnetic tape and has a normally closed lid is placed therein, a first position for attaching and detaching the cassette, and a first position for opening the lid for recording and playback. A cassette loading device comprising a tray that is moved between a second position and a second position where the lid of the cassette is exposed; An actuating member is provided between the cassette placed on the tray and the cassette is moved from the first position to the second position, and when the tray is in the first position, the release member is placed on the tray. Preventing the unlocking protrusion of the placed cassette from operating;
When the tray moves to the second position, the actuation member moves the release member relative to the tray and operates the unlocking protrusion of the cassette placed on the tray to release the lock. A cassette loading device characterized in that the lid is opened by the actuating member when the lid is released.