JPH0744956A - Tape cassette loading device - Google Patents

Abstract

PURPOSE:To reduce the amount of a vertical movement and to make the height size of a device small in the tape cassette loading device for operating the vertical movement succeeding a horizontal movement to a recording operation position. CONSTITUTION:When the vertical movement of a cassette holder 3 along a vertical slot B is started, a pressure receiving surface 15 is pressed by a second pressing surface 32 formed on the front surface of a cassette holder 2 and a sliding plate 23 is moved along a rotation guiding slot 25. At this time, a sixth sliding hole part 29 is slided by a front guiding projection 25 provided on the sliding plate 3, the position of the front guiding projection 25 is moved downward by this sliding movement and the sliding plate 23 is rotated. As the bottom end part of a cap 1 is lifted by a releasing piece 16 provided on the sliding plate 23 accompanying this rotation, the cap 1 of the tape cassette 2 is opened by the rotation of the sliding plate 23 moved interlockingly with the vertical movement of the cassette holder 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette loading device used in a video tape recorder or the like. Specifically, a tape cassette holder equipped with a tape cassette having a lid that opens and closes by rotating,
In a tape cassette loading device that moves along an L-shaped trajectory composed of horizontal movement and vertical movement and opens and closes the lid of the tape cassette during the vertical movement, the lid is moved even if the vertical movement distance is reduced. By making the body sufficiently open, the vertical dimension of the cassette loading device is reduced, and the vertical dimension of the device having the cassette loading device is reduced.

[0002]

2. Description of the Related Art A conventional VHS will now be described with reference to FIG.
An example of a tape cassette loading device in a video tape recorder of the type will be described. In the figure, reference numeral 1 denotes a rotatable lid body that opens and closes an opening formed in the front surface of the tape cassette 2 according to the rotation thereof.
Protects the magnetic tape located in the opening in the closed position covering the opening, and exposes the magnetic tape in the open position. Reference numeral 3 denotes a cassette holder to which the tape cassette 2 is attached. The cassette holder 3 records on a first position where the tape cassette 2 is attached and detached, and a magnetic tape of the tape cassette 2 which is located in front of and below the first position. , Move to and from a reproducible second position.

Reference numeral 4 denotes a pair of cassette holder side plates (one of the cassette holder side plates is not shown) facing each other, and a guide projection 5 is formed on the cassette holder side plate 4 so as to project outward.

Reference numeral 6 denotes a side plate located on the outside of each cassette holder side plate 4 and provided on a substrate (not shown). The side plate 6 has a horizontal elongated hole portion A extending horizontally. An L-shaped guide hole 7 is formed by a vertical elongated hole portion B extending vertically downward from the front end of the horizontal elongated hole portion. A guide protrusion 5 of the cassette holder side plate 4 is slidably engaged with the guide hole 7, and the cassette holder 3 driven by a driving device (not shown) to move is guided by the guide hole 7. Becomes Further, the side plate 6 is formed with a lower guide elongated hole 9 extending in the horizontal direction and a substantially arcuate upper guide elongated hole 8 positioned in front of the guide hole 7.

Reference numeral 10 denotes a guide protrusion 13 on the side surface which slidably engages with the upper guide elongated hole 8 and the lower guide elongated hole 9, respectively.
The sliding plate 10 has an opening piece 16 bent in an L-shape so that its tip portion 17 is directed toward the cassette holder 3. The sliding plate 10 is urged by the spring 12 so that the sliding plate 10 always slides in the direction close to the cassette holder 3 and a counterclockwise turning force is obtained about the guide protrusion 14. There is.

In the above structure, when the cassette holder 3 horizontally moves forward when the tape cassette 2 is loaded, the pressure receiving surface of the sliding plate 10 is formed by the pressing surface 19 formed as a surface vertical to the front surface of the cassette holder side plate 4. The sliding plate 10 is guided by the upper guide elongated hole 8 and the lower guide elongated hole 9 in the same direction as that of the cassette holder 3, and is moved against the force of the spring 12. At this time, the open piece 16
The front end portion 17 of the tape holder 2 substantially comes into contact with the lower end edge of the lid 1 of the tape cassette 2 mounted on the cassette holder 3.

Further, the sliding plate 10, which is pressed by the cassette holder 3 which moves horizontally in the forward direction, slides while the cassette holder 3 is guided by the horizontal elongated hole portion A of the guide hole 7. The opening 16 is rotated clockwise around the guide protrusion 14 as a center of rotation, and the tip 1 of the opening 16 is rotated with the rotation.
7 is a tape cassette 2 mounted in a cassette holder 3
The lid 1 is configured so as to come into contact with the lower end edge of the lid 1 and rotate the lid 1 gradually upward.

Further, when the cassette holder 3 moves further and changes to the vertical movement, the sliding plate 10 and the opening piece 16 stop moving and are fixed in that position. When the cassette holder 3 is lowered in this state, the lower end edge of the lid body 1 of the tape cassette 2 is in contact with the opening piece 16, and therefore is opened as the cassette holder 3 is lowered, so that the tape cassette 2 is recorded, Renewable second
When the position is reached, the lid body 1 is configured to be sufficiently opened.

[0009]

However, in the above-mentioned conventional structure, since the opening operation of the lid 1 is performed while the cassette holder 3 is moving in the horizontal direction, it is opened above the cassette holder 3 which moves horizontally. This requires a space for accommodating the lid body 1, and thus requires the vertical height of the device.

It is to be noted that the opening operation is not performed for the horizontal movement of the cassette holder 3, and the fixed opening piece 16 is located below the lower end edge of the lid 1 when the horizontal movement is completed. In the configuration in which the lid 1 is opened only when the cassette holder 3 is lowered, no space is required above the cassette holder 3 that moves horizontally, but it is necessary to secure a sufficient descending distance of the cassette holder 3 and the entire apparatus The height cannot be reduced.

The present invention reduces the height in the vertical direction.

[0012]

SUMMARY OF THE INVENTION A tape cassette loading device according to the present invention comprises a tape holder mounted with a tape cassette having a lid body that opens and closes an opening formed on a front side surface according to its rotation. From the first position where the cassette is mounted to the second position where the recording and reproducing operations are performed, the horizontal movement is followed by the downward movement, and at least before the downward movement of the cassette holder is started. An opening piece is positioned below the lower end edge of the lid, and the opening piece is rotated in association with the downward movement of the cassette holder, so that the lid is rotated in the opening direction. is there.

[0013]

According to the tape cassette loading apparatus of the present invention, the opening piece is rotated in conjunction with the downward movement of the cassette holder to rotate the lid body in the opening direction according to the above structure. Since the vertical movement amount of the cassette holder for completing the opening of the body can be reduced, the height of the cassette loading device can be reduced and the device having the tape cassette loading device can be downsized and thinned. It is possible.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A tape cassette loading apparatus according to an embodiment of the present invention will be described below with reference to FIGS.
In the figure, the same parts as those of the conventional one are designated by the same reference numerals as those of FIG. 6, and the description thereof will be omitted.

Differences between this embodiment and the conventional tape cassette loading device shown in FIG. 6 will be described with reference to FIG. First, a sliding plate 23 for rotating the lid 1 of the tape cassette 2 is provided in place of the sliding plate 10 in the conventional tape cassette loading device.
4 and a rear guide protrusion 24 thereof, a front guide protrusion 25 is disposed at a position (front position) farther from the first position than the first position, and an open piece 16 similar to the conventional one is disposed. . Then, instead of the upper guide elongated hole 8 and the lower guide elongated hole 9 formed in the side plate 6, respectively,
A single guide slot 26 for rotation, which is curved in an arc shape so as to project upward, is formed.
4 and the front guide protrusion 25 are slidably engaged with the rotation guide elongated hole 26.

The shape of the rotation guide slot 26 will be described in detail. The rotation guide slot 26 has a fourth sliding hole portion 27 inclined upward from the rear end toward the center.
And a fifth sliding hole 28 on the central side that is gentler or less inclined than the fourth sliding hole 27.
And a sixth sliding hole portion 29 that is inclined downward from the fifth sliding hole portion 28 toward the front end portion.

Another difference between the present invention and the conventional tape cassette loading device will be described. The pressing surface 19 formed in front of the conventional cassette holder side plate 4 is replaced with the pressing surface 30. Is. The shape of the pressing surface 30 includes a first pressing surface 31 which is located below and formed in a vertical surface shape, and a second pressing surface 32 which extends from the first pressing surface 31 and is inclined forward. And a third pressing surface 33 that extends in the vertical direction following the second pressing surface 32.

The operation of the tape cassette loading apparatus of the present invention constructed as described above will be described with reference to FIGS. First, as shown in FIG. 2, when the cassette holder 3 in which the tape cassette 2 is mounted is located at the first position, the sliding plate 23 in which the pressure receiving surface 15 is not pressed by the pressing surface 30 of the cassette holder 3 , Side plate 6
The rear guide protrusion 24 of the slide plate 23 is biased by the spring 12 attached to the holding shaft 11 formed so as to project from the inner surface of the fourth slide hole portion of the rotation guide elongated hole 26. It is located at the end of 27 and the front guide protrusion 25 is located at the rear end of the fifth sliding hole 28.

Next, when the cassette holder 3 is horizontally moved to a predetermined position toward the second position which is the recording operation position, as shown in FIG. 3, the first pressing surface 31 of the cassette holder 3 is moved. The pressure receiving surface 15 of the sliding plate 23 contacts. At that time, the tip 17 of the open piece 16 formed on the sliding plate 23
Is substantially in contact with the lower edge of the lid 1 of the tape cassette 2 mounted on the cassette holder 3. Then, when the cassette holder 3 moves horizontally further from this state,
Along with this, the sliding plate 23 moves along the rotation guide elongated hole 26. At this time, the rear guide protrusion 24 slides in the fourth sliding hole portion 27, and the position of the rear guide protrusion 24 is relative to the front guide protrusion 25 moving in the fifth sliding hole portion 28. Since it moves upward, the sliding plate 23 and the opening piece 16 rotate clockwise around the front guide protrusion 25,
The lid body 1 of the tape cassette 2 is gradually rotated upward, and the opening operation of the lid body 1 is started.

Next, as shown in FIG. 4, the cassette holder 3 is further horizontally moved forward so that the guide protrusion 5 is moved into the guide hole 7.
Immediately before it is located in the vertical elongated hole portion B, the rear guide protrusion 24 of the sliding plate 23 pressed by the first pressing surface 31 has finished sliding in the fourth sliding hole portion 27. The rear guide protrusion 24 and the front guide protrusion 25 are located at both ends of the fifth sliding hole portion 28, respectively.

From the state shown in FIG. 4, when the guide protrusion 5 is positioned in the vertical elongated hole portion B of the guide hole 7 and the cassette holder 3 starts to vertically descend toward the second position, the second downward movement is caused by the downward movement. The pressure receiving surface 15 of the sliding plate 23 is pressed by the pressing surface 32, and the sliding plate 23 moves further forward.
As a result of this movement, the front guide protrusion 25 moves the sixth sliding hole 29
Sliding, the position of the front guide protrusion 25 moves downward due to the sliding, the sliding plate 23 rotates clockwise, and the pressure receiving surface 15 thereof moves toward the third pressing surface 33. It is adapted to slide on the second pressing surface 32. At this time, the vertical movement of the cassette holder 3 and the rotation of the sliding plate 23 cause the lid 1 of the tape cassette 2 to be rapidly opened.

Then, the guide protrusion 5 completes the movement of the vertical elongated hole portion B of the guide hole 7, and the cassette holder 3 is moved to the second position.
Before the position is reached, the lid body 1 of the tape cassette 2 completes the opening, and as shown in FIG. 5, the pressure receiving surface 15 moves from the position of the second pressing surface 32 to the position of the third pressing surface 33. After that, even if the cassette holder continues to descend, the sliding plate 23
The sliding plate 23 does not rotate because there is no pressure to move it forward.

As described above, according to this embodiment, since the opening piece is rotated in association with the downward movement of the cassette holder, the lid body is rotated in the opening direction. It is possible to reduce the vertical movement amount of the cassette holder for completing the opening.

[0024]

The tape cassette loading device of the present invention comprises:
Since the opening piece is rotated in conjunction with the downward movement of the cassette holder to rotate the lid body in the opening direction, the vertical movement amount of the cassette holder for completing the opening of the lid body is reduced. As a result, the height of the tape cassette loading device can be reduced, and the device having the tape cassette loading device can be made smaller and thinner.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts of a tape cassette loading device according to an embodiment of the present invention.

FIG. 2 is a side view showing one operation state of the embodiment.

FIG. 3 is a side view showing another operation state of the embodiment.

FIG. 4 is a side view showing still another operation state of the embodiment.

FIG. 5 is a side view showing still another operation state of the embodiment.

FIG. 6 is an exploded perspective view of a main part of a conventional tape cassette loading device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lid 2 Video cassette 3 Cassette holder 4 Cassette holder side plate 5 Guide protrusion 6 Side plate 7 Guide hole 15 Pressure receiving surface 16 Opening piece 17 Tip part 23 Sliding plate 24 Guide protrusion 25 Guide protrusion 26 Rotating guide long hole 27 Fourth Sliding hole portion 28 fifth sliding hole portion 29 sixth sliding hole portion 30 pressing surface 31 first pressing surface 32 second pressing surface 33 third pressing surface

Claims (1)

[Claims] 1. A recording / reproducing operation from a first position where a tape cassette is mounted to a cassette holder, the cassette holder having a lid body which opens and closes an opening formed on a front side surface according to its rotation. In a tape cassette loading device in which the horizontal movement is followed by a downward movement to a second position in which the opening piece is performed, an opening piece is positioned below the lower end edge of the lid body at least before the downward movement of the cassette holder is started. A tape cassette loading device for rotating the lid in the opening direction by rotating the opening piece in conjunction with the downward movement of the cassette holder.