JPS61276164A - Cassette loading device - Google Patents

Abstract

PURPOSE:To open and close an opening part where a tray is put in and taken out in a simple constitution and to attain a compact cassette loading device, by providing a door which can be turned freely between the closing and opening positions for said opening part. CONSTITUTION:A magnetic tape is loaded into a cassette 9 and a tray 6 holds the cassette 9 and moved between the 1st position where the cassette 9 is loaded and unloaded and the 2nd position where the recording/reproducing operations are carried out. A door 4 is set freely rotatably between the closing and opening positions of an opening part where the tray 6 is put in and taken out. The door 4 is pressed toward the lower outside part via the lower surface side of the tray 6 when the tray 6 is moved to the 1st position from the 2nd position. Thus the opening part is opened. Then the pressure of the door 4 due to the lower surface side of the tray 6 is released when the tray 6 moves to the 2nd position from the 1st position. Thus the opening part is closed.

Description

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

[Summary of the invention]

The present invention provides a cassette loading device comprising a tray in which a cassette containing a magnetic tape is placed and is moved between a first position for loading and unloading the cassette and a second position for recording and reproducing. In the apparatus, a door is provided so as to be rotatable between a position where the opening through which the tray moves forward and backward is closed and a position where it is opened. Press outward and downward to open the opening, and the tray
When moving from the first position to the second position, the pressure from the bottom surface of the door tray is released and the opening is closed, allowing the opening to be opened and closed using a simple oval configuration, resulting in a more compact device. It has been made possible.

[Conventional technology]

Conventionally, there are various types of cassette loading devices, the representative ones being the pop-up type and the slot-in type. In the pop-up method, a cassette holder is provided so as to protrude from the top surface of the device (pop-up) and accommodate the cassette holder.

When installing a cassette, the cassette holder is popped up, the cassette is inserted into the cassette holder, and the cassette is pressed from the top to be housed in the main body of the device. On the other hand, in the slot-in method, there is an opening in the front of the device that is normally closed by a door, and when the cassette is slightly inserted into the opening while pushing the door open with its tip, the rest is automatically closed. The cassette is housed inside.

[Problem that the invention seeks to solve]

However, with the pop-up method, the cassette holder pops up from the top of the device when loading or unloading the cassette.
This was inconvenient because it was not possible to stack other devices on top of the device. On the other hand, the slot-in method does not have such a drawback because the cassette is inserted from the front, but it does have the drawback that the structure of the opening becomes complicated and the device becomes larger. That is, when the cassette is inserted through the opening, the closed door is simply pushed inward by the cassette and opened by the biasing force of the spring, so no special mechanism is required. However, when ejecting the cassette, a special mechanism is required to open this door inwardly against the biasing force of the spring before the cassette is ejected from the opening. On the other hand, it is conceivable to open the door to the outside of the opening, but this would make the operation when inserting the cassette inconvenient.

[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 the door 4 which is rotatable outward and downward about the fulcrum 3. Reference numeral 65 is a spring that always biases the door 4 in the direction of closing.

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). Reference numeral 15 designates a notch for movably protruding the projection 13 of the release member 11 into the recess 10 of the tray 6 (FIG. 8). 16 is a plate rotatably provided on the tray 6 about a fulcrum 17, and the cassette 9
comes into contact with lid 7.

In order to prevent the cassette 9 from falling into the opening 2, the inner side surface of the recess 10 (the left side surface in FIG. 1) can be placed in a closed position or in an open position. There is. Reference numeral 18 denotes an actuating member, and when the tray 6 moves inside the housing 1, its side surface touches the bending part 12 of the release member 11, and its upper surface touches the lid 7 and the plate 16.
It is possible to make contact with the lower end of each. 19 is tray 6
The pin 20 implanted in the release member 11 is a long hole formed in the release member 11, and the pin 19 is fitted into the long hole 20, and the release member 11
It is designed to guide the movement of the

Of course, the formation positions of the pin 19 and the elongated hole 20 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 rack plates arranged on the outside of the left and right guide plates 21, respectively, and are inclined downward at approximately 45 degrees. Guide holes 27 and 28 that are parallel to each other and a guide hole 29 that has an inclined portion that is inclined upward at approximately 45 degrees and a horizontal portion are formed. 31 is guide plate 2
It is a pin planted in 1.

It 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. 34 is a pin implanted at one rear end of the arm 32.

It is fitted into the guide hole 29 of the rack plate 26.

35 is a vertically movable lumbar, and on its left and right sides,
It has a pin 37 fitted into a long hole 36 formed in the guide plate 21.

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 plate 26, and mesh with the gears 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.

When a load of a predetermined value or more is applied to the guide plate 26, slipping occurs.

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 protrusions 53 and are activated (
(on or off).

[Effect]

The effect will now be explained. First, when loading the cassette 90, the motor 41 is energized by operating, for example, an eject switch (not shown), and the tray 6 is protruded 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 of the recess 10 (the side surface on the opening 2 side). Therefore, the position of the lid 7 is regulated by contacting the lid 7, and as shown by the two-dot chain line in FIG. Figure (b
) and (c), 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 the 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. Furthermore, even when the door 4 is opened in the ascending 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.
It is inserted within 1. At this time, the release member 11 is moved inward by the spring 14 until the outer end of the elongated hole 20 contacts the pin 19 of the tray 6 (on the right side in FIG. 8).
, so that the protrusion 13 does not contact (press) the protrusion 62 of the cassette 9 (Fig. 10).Therefore, the cassette 9 is simply placed in the recess 10. In this state, the lid 7 is opened and the magnetic tape is prevented from being damaged. 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 the cassette 9 can be moved forward or backward (Fig. 13(a)) or the top and bottom surfaces can be reversed (Fig. 13(a)). If the cassette 9 is not placed properly as shown in FIG. is made clear to the user at a glance.

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
If the cassette 9 collides with the tray 6 and the tray 6 is no longer housed inside the recess 10, or if 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. In case 11, when the tray 6 is slightly pressed inward, the protrusion 53 separates from the switch 52, so this may be detected and the motor 41 may be energized from then on. 1 which is transmitted to the phase shaft 43 and therefore to the phase gears 44 at both ends thereof.
Since the phase gear 44 is engaged with the rack 45, 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 and 25 come near the ends of the horizontal portions of the guide holes 2z and 23, the side surface of the first 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 cutout 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 lower ends of the lid 7 and the plate 16 are pressed against the upper surface of the actuating member 18, and the lid 7 and the plate 16 rotate upward together 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 bottle 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 long 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 expands (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 moved by the biasing force of the spring 38. Securely clamped.

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 hole 27.28 that drives the pin 24.25 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. Pin 24.25 is in guide hole 22.23
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 moves in the horizontal part of the guide hole 29.
This can be prevented by preventing the rack from moving further downwards, 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 protrusion 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 in the upward direction 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 rotate the tray 6 in the upward direction to open it. When the tray 6 is ejected to the outside 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 provides a tray in which a cassette containing a magnetic tape is placed and is moved between a first position for attaching and detaching the cassette and a second position for recording and reproducing. In the cassette loading device, a door is provided so as to be rotatable between a position where the opening through which the tray moves forward and backward is closed and a position where it is opened. The opening is opened by pressing outward and downward against the bottom surface of the tray, and when the tray moves from the first position to the second position, the pressure of the bottom surface of the tray on the door is released and the opening is opened. Since the opening is closed, the opening can be opened and closed with a simple WH configuration, and the device can be made more compact. Therefore 8
This is particularly effective in m-video tape recorders and the like.

[Brief explanation of the drawing]

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...Bin 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)

[Scope of Claims] A tray in which a cassette containing a magnetic tape is placed and moved between a first position for attaching and detaching the cassette and a second position for recording and reproducing. In the cassette loading device, a door is provided to be rotatable between a position where the opening through which the tray advances and retreats is closed and a position where it is opened, and the tray moves from the second position to the first position. When the door is pressed outward and downward by the lower surface of the tray to open the opening, and when the tray moves from the first position to the second position, the door is pressed outwardly and downwardly by the tray. A cassette loading device characterized in that the opening is closed by releasing the pressure from the lower surface of the cassette loading device.