JPS61199264A - Cassette loading device - Google Patents

Abstract

PURPOSE:To prevent cassettes and the other foreign matters from being erroneously inserted, by stopping the movement of an interlocking means by a moving means to make it impossible to open a door when a holder is moved to the second position by the moving means. CONSTITUTION:When phase gears 28 and 42 are rotated furthermore, a holder 35 is moved downward because guide holes 34 and 48 are extended down approximately vertically from halfway positions. At this time, since the extent of lift of a cam 51 is reduced gradually, a slider 61 falls gradually by the energizing force of a spring 71, and a lever 52 is turned clockwise. Consequently, upper and lower doors 65 and 69 are closed. When the holder 35 falls to a prescribed position (recording and reproducing position), this fall is detected by a means omitted in the figure to release the power supply to a motor 22. Then, a lid 12 and an ink cartridge of a cassette 11 are opened. When the cam 51 is rotated to a prescribed position, a lock part 56 locks a pin 54 (as shown in the figure). As the result, interlocking lever 52 and slider 61 cannot be turned or moved, and it is impossible to open upper and lower doors 65 and 69.

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.

[Conventional technology]

4 and 5 show the structure of a cassette loading device in a conventional video tape recorder. In these figures, 1 is a housing, and an opening 2 is provided therein. A door 3 is rotatable about a fulcrum 4 between a position where the opening 2 is closed and a position where it is opened. A holder 5 holds the cassette 11. 6
is a stopper that is rotatable around a fulcrum 7. Since its center of gravity 8 is on the left side of the fulcrum 7 in the figure, it is always rotated counterclockwise, and normally the locking portion 9
It is designed to come to rest at the position where it touches. Reference numeral 10 denotes a holding portion for holding down the cassette 11. 12 is a lid of the cassette 11, which is rotatable around a fulcrum 13. 14 is an inner lid, which is supported with respect to the lid 12.

When the door 3 is pressed with the tip of the cassette 11, the door 3 is rotated inward about the fulcrum 4, and the cassette 1
1 is held on the holder 5. When the cassette 11 is further pressed inside, a moving means (not shown) is operated, and the holder 5 is moved further inside and to a lower recording/reproducing position.

Thereupon, the lid 12 and inner lid 14 are opened, and the magnetic tape housed inside the cassette 11 is pulled out and wound around the outer periphery of the rotating drum (both not shown). Therefore, video signals etc. can be recorded and reproduced. When the holder 5 moves downward, the end of the cassette 11 comes into contact with the stopper 6, and the stopper 6 is rotated clockwise. As a result, even if you try to insert another cassette 11,
The distal end portion contacts the stopper 6 and cannot be inserted, thereby preventing double insertion (erroneous insertion).

[Problem that the invention seeks to solve]

However, it has been difficult to apply such a conventional device when the cassette is small, such as a so-called 8 MB video tape recorder. In other words, in a state as shown in FIG. 4 where a part of the cassette 11 is exposed, a certain distance A from the rear end of the cassette 11 to the front of the housing 1 is secured in order to grasp the cassette 11 with fingers when installing or removing it. There is a need. Assuming that the height of the door 3 is E, the distance B between the open end of the door 3 and the rear end of the cassette 11 is longer than at least the sum of the distance A and the distance E. Cassette 11
In order to stably press the presser part 10, the cassette 1
It is necessary to position it approximately in the center of 1. In order to avoid collision with the rotated door 3, the holding part 10 must be positioned further inward than the distance B from the rear end of the cassette 11. In other words, the length of the cassette 11 is D
If so, it is necessary to provide the holding portion 10 between the distance DB. - As shown in Figure 5, the lid 12 and the inner lid 14 are opened upward at the recording/reproducing position.The distance from the end of the opened inner lid 14 to the rear end of the cassette 11 is C, in order to avoid collision with the inner lid 14, the holding part 10
must be located outside the distance C. In the end, the possible mounting position of the holding part 10 is between distance F (distance C-B) (for convenience, distance B in FIG. 5 is drawn shorter than in FIG. 4), distance C (therefore, distance D
) was not made sufficiently large to hold the cassette 11 stably.

By dividing the door 3 into two parts, the distance E and therefore the distance B can be reduced (and the distance F can be increased). However, in this case, the lower door collides with the stopper 6 and cannot be opened.

[Means for solving problems]

1 and 2 show the structure of a cassette loading device according to the present invention. In these figures, 21 is a base such as a chassis, to which a motor 22 is fixed. The rotation of the motor 22 is transmitted to the worm 24 via a speed reduction mechanism 23 consisting of a predetermined pulley, belt, etc. 25 is a worm wheel that meshes with the worm 24. Axis 26 at the center of the worm wheel 25
Another gear 27 is coaxially attached to and meshes with the phase gear 28. 29 is an arm having a gear 30 that meshes with the phase gear 28, and is rotatable around a shaft 31. 32 is a long hole formed in the arm 29, into which a pin 33 is slidably fitted. The pin 33 is also fitted into the guide hole 34, and one end thereof is connected to the holder 35.

If the above mechanisms except for the holder 35 are formed, for example, on the right side of the device, a similar mechanism is also formed on the left side. That is, the rotation of the phase gear 28 is transmitted to the phase gear 42 on the left side via the phase axis 41 at the center thereof.
Both are designed to rotate synchronously. 43 is an arm having a gear 44 that meshes with the phase gear 42;
It can be rotated freely around the center. 46 is arm 43
The pin 47 is a long hole formed in the hole, into which a pin 47 is slidably fitted. The pin 47 is also fitted into the guide hole 48, and one end thereof is connected to the holder 35. 51 is a cam formed on the arm 43. Reference numeral 52 denotes a lever, which is rotatable around a fulcrum 53. Pins 54 and 55 are formed at both ends of the lever 52.
comes into contact with the cam 51. 56 is cam 5
This is the lock part provided in 1.

61 is a slider to which a pin 55 is connected, and the rack 6
It has a value of 2.63. The rack 62 has a substantially fan-shaped gear 64
The upper door 65 can be rotated about a shaft 66. The rack 63 meshes with a substantially fan-shaped gear 68 via a reversing gear 67, allowing the lower door 69 to rotate about a shaft 70. Reference numeral 71 denotes a spring, which keeps the slider 61 downward (leftward in FIG. 1(c)).
is energized.

[Effect]

The operation will be explained with reference to FIG.

Before the cassette 11 is inserted, the upper door 65 and the lower door 69 are in a closed state due to the biasing force of the spring 71 (FIG. 3(a)).

When the upper door 65' and the lower door 69 are pressed with the tip of the cassette 11 against the biasing force of the spring 71 in this state, the upper door 65 and the lower door 69 are moved inwardly around the shafts 66 and 70, respectively. Rotate. At this time, the gear 64 rotates clockwise and the gear 68 rotates counterclockwise, so that the five racks 62 and 63, and therefore the slider 61, move upward. the result.

The lever 52 rotates counterclockwise around the shaft 53,
The pin 54 separates from the cam 51 (FIG. 3(b)). This state also occurs when the cassette 11 is ejected. Therefore, in this state, the rear part of the cassette 11 is exposed to the extent that it can be grasped with fingers.

When the cassette 11 is further pushed inside from this state, a means (not shown) detects this and the motor 22 is energized. Therefore, the phase gear 28 is rotated via the reduction mechanism 23, the worm 24, the worm wheel 25, and the gear 27. At this time, since they are coaxially coupled by the phase shaft 41, the phase gear 42 rotates in synchronization. When the phase gear 28 rotates, the gear 30 rotates, and the arm 29 rotates clockwise about the shaft 31 in FIG. 1(b).

Similarly, when the phase gear 42 rotates, the gear 44 rotates, and the arm 43 rotates counterclockwise about the shaft 45 in FIGS. 1(c) and 3.

Therefore, since the pin 33.47 is pressed by the arm 29.43 and moves inward along the guide hole 34.48,
The holder 35 moves inward approximately horizontally. At this time, cam 5
Since the lift amount (distance from shaft 45) of pin 1 increases, pin 54 is pressed by force 1151, and lever 52 further rotates counterclockwise. Therefore, the upper and lower doors 65, 69 rotate further.

The cassette 11 is completely housed inside (Fig. 3(C)
).

As the phase gear 28.42 rotates further, the guide hole 34
．． 48 is directed downward substantially perpendicularly therefrom, so that the holder 35 moves downward. At this time, the lift amount of the cam 51 gradually decreases, so the slider 61 gradually descends due to the biasing force of the spring 71, and the lever 52 rotates clockwise.

Therefore, the second lower door 65,69 is closed. Holder 35
When the motor 22 is lowered to a predetermined position (recording/reproducing position), an unillustrated means detects this and de-energizes the motor 22.

Here, the lid 12 and inner lid 14 of the cassette 11
will be released. Further, when the cam 51 rotates to a predetermined position, the lock portion 56 locks the pin 54 (Fig. 3(d)).
). As a result, the lever 52 is interlocked. The slider 61 cannot be rotated or moved, and the upper and lower doors 65
．． 69 cannot be opened.

When ejecting the cassette 11, the motor 22 is reversely rotated, and the operation opposite to that described above is performed.Predetermined stoppers or the like are arranged in the rotation paths of the upper and lower doors 65 and 69 so that they can move forward and backward. It is also possible to make the .69 unopenable. However, in that case, extra parts are required, and the construction becomes complicated, resulting in varnish 1 to high. Therefore, according to the present invention, the lever 52 (or the slider 61), which is disposed outside the rotation path of the upper and lower doors 65, 69 and moves in conjunction with the upper and lower doors 65, 69, is prevented from moving. is preferable.

In addition, although the above description has been made using an example in which the door is divided into two parts, the present invention can also be applied to a case in which the door is divided into one piece.

〔effect〕

As described above, the present invention includes a door that is rotatable between closing and opening an opening for inserting and removing a cassette, a holder that holds a cassette, and a door that holds at least one of the held cassettes. a moving means for moving the cassette between a first position in which a portion is exposed through the opening and a second position in which the cassette is completely housed and placed in a predetermined position; An interlocking means that moves in conjunction with each other is provided, and when the holder is moved by the moving means, the motion of the moving means is transmitted to the interlocking means, the interlocking means opens the door, and the moving means moves the holder to the second position. When it moves, the moving means prevents the interlocking means from moving;
Since the door cannot be opened, it is not only possible to prevent a cassette or other foreign object from being accidentally inserted, but also it can be applied even when the cassette is small.

[Brief explanation of the drawing]

Figure 1 (,) is a plan view of the cassette loading device of the present invention, Figure 1 (b) is its right side view, Figure 1 (c) is its left side view, and Figure 2 is its enlarged left side view. 3 is a left side view showing the case where the cassette is inserted, FIG. 4 is a side view of a conventional cassette loading device, and FIG. 5 is a side view when the cassette is installed. 2... Opening 3... Door 5.35... Holder 6... Stopper 10...
Holding part 11...Cassette 12...Lid
14... Inner lid 24... Worm 25... Worm wheel 28.42... Phase gear 29.43... Arm 30.44.64.78... Gear 34.48... Guide Hole 41... Phase axis 51...
...Cam 52...Lever 56...Lock part 61...Slider 62.63
... Rack 65 ... Upper door 67 ... Reversing gear 69 ... Lower door 71 ... Spring or more

Claims (1)

[Claims] (1) A door that is rotatable between closing and opening an opening for inserting and removing a cassette; a holder that holds the cassette; and at least a portion of the cassette that is held by the holder. moving means for moving the cassette between a first position in which the cassette is exposed from the opening and a second position in which the cassette is completely contained and placed in a predetermined position; and rotation of the door. an interlocking means that moves in conjunction with the moving means, and when the moving means moves the holder, the movement of the moving means is transmitted to the interlocking means, the interlocking means opens the door, and the moving means A cassette loading device characterized in that when the holder is moved to the second position by the moving means, the interlocking means is prevented from moving, thereby making it impossible to open the door.