JPS61276159A - Cassette loading device - Google Patents

Abstract

PURPOSE:To attain the accurate drive of a clamper in a simple constitution by providing a clamper and a pin to press a cassette together with an arm and a pin guide hole respectively. CONSTITUTION:A clamper 35 and a pin 34 are provided to press a cassette 9 together with an arm 32 which drives an aim 32 and a guide hole 29 into which the pin 34 is set. The pin 34 is guided by the hole 29 for drive the arm 29 via a rack plate 26. Te arm 32 is driven with the shift of the plate 26. The clamper 35 is shifted to a position where the clamper 35 has no contact with the cassette 9 put on a tray 6 when this tray 6 is set at the 1st position where the tray 6 is loaded and unloaded. Then the the clamper 35 is shifted to a position where the clamper 35 presses the cassette 9 when the tray 6 is set at the 2nd position where the recording/reproducing is carried out. At the same time, the pin 34 is fixed at a prescribed position and then put into the hole 29 of the plate 26. Thus the plate 26 is guided.

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 includes a mounting means in which a cassette containing a magnetic tape is mounted and is moved between a first position for mounting and removing the cassette and a second position for recording and reproducing. A clamper that presses a cassette in a cassette loading device.

An arm in which a pin is implanted to drive the clamper, and a rack plate having a guide hole into which the pin is inserted and which drives the arm by guiding the pin through the guide hole are provided, and the arm is moved by moving the rack plate. When the mounting means is in the first position, the clamper is moved to a position where it does not come into contact with the cassette placed on the mounting means, and when the mounting means is in the second position, the clamper is moved. Move the cassette to the pressing position and fix the pin at a predetermined position, insert the fixed pin into the guide hole of the rack plate into which the pin implanted in the arm is inserted,
By guiding the movement of the rack plate, the clamper can be accurately driven with a simple configuration, and the number of parts can be reduced to realize miniaturization of the device.

[Conventional technology]

In a magnetic recording/reproducing device, it is necessary to accurately position a magnetic tape and a magnetic head serving as a recording/reproducing means. Therefore, at least at the recording/reproducing position, it is common to clamp the cassette containing the magnetic tape onto its mounting table. However, before the cassette is brought to the recording/reproducing position, it is necessary to keep the clamper that presses the cassette a sufficient distance from the mounting table in order to facilitate the mounting and loading operations of the cassette. Various devices have been proposed in the past to satisfy these conditions.

[Problem that the invention seeks to solve]

However, it is difficult to miniaturize all such conventional devices, and the most important feature is that they are smaller than, for example, a 1/2-inch video tape recorder.
It has been difficult to apply this method to mm video tape recorders and the like.

[Means for solving the problem in question 9] Figures 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 projection 13 of the release member 11 into the recess 1o 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
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 1o (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 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 lumbar, 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 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 this state, hold the cassette 9 by hand and place it in the recess 10 of 1-Reiro. 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 lid 7 is brought into contact with the cassette 9 and its position is restricted, and there is no risk that the cassette 9 will fall out of the opening 2 or be erroneously inserted, as shown by the two-dot chain line in FIG. 12(d). Also, Figure 12 (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. Even if there is, the operability will not deteriorate. Yet another door 4
Even when the tray 6 is opened in the upward direction and the tray 6 is ejected from the opening 2, the opening 2 can be substantially closed, thereby preventing foreign objects from being inserted through the opening 2.

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).
10, the protrusion 13 does not contact (press) the protrusion 62 of the cassette 9 (FIG. 10). Therefore, the lid 7 is opened only when the cassette 9 is placed in the recess 10, and the magnetic tape is prevented from being damaged. Also, the release member 6 is attached to the tray 6.
4 is fixed, the release member 64 is attached to the protrusion 61.
The lock will not get stuck behind the lock and become impossible to unlock (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 left lower surface thereof. Therefore, unless the cassette 9 is moved forward or backward (Fig. 13(a)), or the top and bottom surfaces are reversed (Fig. 13(b)), or the cassette 9 is not placed properly,
Any part of the cassette 9 from the notch 15 to the recess 10
It rides on the protrusion 13 that protrudes inward, and the user can see at a glance that it has been 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, some part of the cassette 9 collides with the casing 1 on the outer periphery of the opening 2, causing the tray 6 to collapse. is no longer contained inside. Also plate 1
Even when the cassette 9 is installed in the recess 10 with the plate 6 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 thereafter.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 of the six phase gears 44, which are connected to the rack 45. Since the left and right thick plates 26 are engaged with each other, the left and right thick plates 26 move backward. Since the pins 24 and 25 are pressed against the outer inclined surfaces of the guide holes 27 and 28, the pins 24 and 25 are guided by the horizontal portions of the guide holes 22 and 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 the lower surface thereof, rotates upward about the fulcrum 3 due to the biasing force of the spring 5, and stops at a position where it abuts against a stopper (not shown). Opening 2 is closed.

When the pin 24 , 25 is near the end of the horizontal portion of the guide hole 22 , 23 , the side surface of the actuating member 18 abuts against 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 portion to the inclined portion of the guide hole 29. 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 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 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 22.2
Rotation of the rack plate 26 when the pin 34 is moving in the horizontal part of the guide hole 29 is caused by the pin 37 coming into contact with the upper end of the elongated hole 36, and the pin 34 moving in the horizontal part of the guide hole 29.
This can be prevented by preventing further downward movement of the pins 24, 25 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. (In some cases, a biasing spring can be provided). 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 pins 24.25 are guided by the horizontal portions of the guide holes 22.23, and the tray 6 moves in the horizontal direction. 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, as it may interfere with the operation of attaching and detaching the cassette 9. Also, the door 4 should be rotated inward. ,
If this is done, it becomes necessary to secure a space for rotation, which not only increases the size of the device, but also makes it easy for children to play with it because it can be opened simply by pressing inward. Therefore, it is preferable to open it by rotating it in the upward direction. When the tray 6 is ejected to the outside through the opening 2 and reaches a predetermined position, the protrusion 53 operates the switch 52 to de-energize the motor 41 and the unloading operation is completed.

〔effect〕

As described above, the present invention provides a mounting device 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. A cassette loading device comprising:
A clamper that presses the cassette, an arm in which a pin is implanted and drives the clamper, and a rack plate that has a guide hole into which the pin is inserted and drives the arm by guiding the pin through the guide hole, The arm is driven by the movement of the rack plate, and when the mounting means is in the first position, the clamper is moved to a position where it does not come into contact with the cassette placed on the mounting means, and when the mounting means is in the second position. position, move the clamper to the position to press the cassette, fix the pin in place, and insert the fixed pin into the guide hole of the rack plate into which the pin implanted in the arm is inserted. However, since the movement of the rack plate is guided, it is possible to accurately drive the clamper with a simple configuration, reduce the number of parts, and downsize the device.

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

[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 1o... Recessed part 11... Release member 12 Bent 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 63...Magnetic tape and above Figure 12 (a) (c) (b) (d )

Claims (1)

[Claims] A cassette in which a magnetic tape is stored is placed, and the cassette is moved between a first position for attaching and detaching the cassette and a second position for recording and reproducing. A cassette loading device comprising a clamper for pressing the cassette, an arm in which a pin is implanted and drives the clamper, and a guide hole into which the pin is inserted, the pin being guided by the guide hole. a rack plate for driving the arm by moving the rack plate, driving the arm by moving the rack plate, and placing the clamper on the placing means when the placing means is in the first position; and when the mounting means is in the second position, moving the clamper to a position where it presses the cassette;
Fixing a pin at a predetermined position, and inserting the fixed pin into the guide hole of the rack plate into which the pin implanted in the arm is inserted to guide the movement of the rack plate. A cassette loading device featuring: