JP3415411B2 - Cassette loading device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette loading apparatus used in a magnetic recording / reproducing apparatus, and more particularly, to moving a movable chassis to position the cassette at a position during operation.
The present invention relates to a device suitable for use in a so-called slide type cassette loading device.

[0002]

2. Description of the Related Art A conventional technique will be described below with reference to FIGS. As a conventional technique, a so-called slide type cassette loading device that moves a movable chassis to position a cassette at a position during operation will be described as an example.

FIG. 4 is a perspective view of a VTR mechanical section equipped with a conventional cassette loading apparatus, FIG. 5 is a side view of a VTR mechanical section equipped with a conventional cassette loading apparatus, and FIG. 6 is a conventional top cover. FIG.

A conventional cassette loading device will be described with reference to FIG. A schematic configuration of a conventional cassette loading device includes a cassette housing 11 that holds a cassette and a top cover 12 that controls the movement of the cassette housing.

The cassette housing 11 has an engaging pin 11
a is planted, and the engagement pin 11a fits into the guide hole 12a provided in the top cover 12 and is slidable.

The top cover 12 also has an engaging pin 12
b is implanted, and the engaging pin 12b is the cassette housing 1
It is slidable in the guide hole 11b provided in the No. 1. Therefore, the cassette housing 11 is configured to be slidable with respect to the top cover 12 in a substantially radial direction.

The top cover 12 has a shaft 12c. The shaft 12c is rotatably supported in a rotation fulcrum hole 19a provided in a side plate 19 planted in the main chassis 18.

Further, as shown in FIG. 4, a coil spring 16 is attached to the shaft 12c, one end of the coil spring 16 is fixed to a side plate 19 planted in the main chassis 18, and the top cover 12 is rotated in the opening direction. Energized.

The cassette housing 11 is rotationally biased in the closing direction by a leaf spring (not shown) provided on the top cover 12.

Referring to FIGS. 4 and 5, the movable chassis 1
The sliding of 7 is performed by the guide shaft 18a implanted in the main chassis 18 and the guide hole 17c provided in the movable chassis 17.
It is configured to be guided and slide by.

Further, in FIG. 4, the movable chassis 17 is provided with a guide portion 17b. The guide portion 17b guides the engaging pin 11a implanted in the cassette housing 11, and is configured to perform a smooth operation in the arrow B direction when the cassette mounting portion of the cassette housing 11 is opened and closed. .

Next, the operation from the insertion of the cassette to the completion of the tape loading will be briefly described. First, when the cassette is inserted into the cassette housing 11 and the top cover 12 is manually pushed to the closed position, the cassette is loaded at the reference position on the upper surface of the movable chassis 17.

Subsequently, when loading of the cassette is detected by a switch (not shown) for detecting loading of the cassette, a loading motor (not shown) starts driving.

The movable chassis 17 is constructed so as to be moved by a loading motor, and starts to slide in the direction of arrow B in FIG.

Next, when the sliding movement of the movable chassis 17 is completed, the cassette is positioned at the regular position during the recording or reproducing operation. The tape loading operation is started almost at the same time as the start of the slide movement, and is completed almost at the same time as the end of the slide movement. Conventionally,
The cassette is loaded with the configuration and operation described above.

FIG. 6 is a view showing the top cover 12.
The top cover 12 includes, for example, a top cover body formed by pressing, and a shaft 12c formed by extruding or drawing an aluminum material.

In FIG. 6, the shaft 12c is attached to the top cover 1
2 attached to the main chassis 18
By attaching the rotation fulcrum portion 12ca of the shaft 12c to the rotation fulcrum hole 19a provided in the shaft 12, the shaft 12c is attached to the main body and is rotatably supported by the side plate 19.

The shaft 12c is pivotally supported by the side plate 19 and functions as a pivotal support shaft for the top cover 12. The greatest purpose of providing the shaft 12c is to secure the mechanical strength of the top cover 12. .

[0019]

The conventional cassette loading device has the following problems. A shaft 12c is provided to secure the strength of the top cover, and is attached to the rotation fulcrum hole of the side plate planted in the main chassis.
Therefore, the provision of the shaft 12c is a factor that hinders the thinning of the device.

More specifically, in the conventional top cover, in order to increase the mechanical strength, the shaft 12c having a diameter as large as possible was attached to secure the strength of the top cover. Therefore, as the mechanical size, a space for the shaft 12c is required, which is a factor that hinders the reduction in the thickness of the mechanical portion.

Further, the cost of parts for the shaft 12c and the mounting and processing cost are inevitably required, resulting in an increase in the cost of the apparatus.

[0022]

Cassette loading apparatus of the present invention SUMMARY OF THE INVENTION comprises a cassette housing for holding the cassette, and the top cover, the cassette housing is slid to control the movement of the engagement and the cassette housing in the cassette housing Luke In the set loading device, the entire circumference of the outer circumference of the top cover is drawn.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Regarding one embodiment of the present invention,
This will be described below with reference to FIGS. 1, 2 and 3. FIG. 1 is a top view showing a cassette loading apparatus of the present invention, and FIG. 2 is a left side view of a VTR mechanical section equipped with the cassette loading apparatus of the present invention.
FIG. 3 is a right side view of a VTR mechanical portion equipped with the cassette loading device of the present invention.

The cassette loading device of the present invention will be described with reference to FIGS. 1, 2 and 3. The basic configuration of the cassette loading device according to the present invention is connected to a cassette housing 1 that holds a cassette, a top cover 2 that controls the movement (vertical and sliding movement) of the cassette housing, and is fixed to the main chassis 8. The side plate 3 connects the top cover 2 to the main chassis 8.

In FIGS. 2 and 3, the cassette housing 1 is a link 1b rotatably mounted on a shaft 1e.
Have. The link 1b is the shaft 1f of the movable chassis 7.
It is rotatably attached at. Also, link 1b
A guide pin 1a is attached to the guide pin 1
a is fitted in a guide hole 2a provided in the top cover 2 and slides in the guide hole 2a.

The down guide 1c is for positioning the cassette during the pushing operation after the cassette is inserted, and the screw 1d shown in FIGS.
It is fixed by.

The down guide 1c moves the housing in conjunction with the sliding movement of the movable chassis 7.

The guide pin 1a is attached to the link 1b, the guide pin 1a is engaged with a guide hole 2a of a top cover 2 which will be described later, and the operation of the cassette housing 1 is controlled in conjunction with the rotating operation of the top cover 2. is doing.

The top cover 2 is the guide pin 1 described above.
a guide hole 2a that engages with a and guides the movement (vertical and sliding movement) of the cassette housing 1, a gear portion 2b that engages with the damper 4 and obtains a damping effect from the damper 4,
The top cover 2 is prevented from floating after the cassette loading is completed by engaging with a pivot fulcrum hole 2c provided on the side plate 3 as a pivot fulcrum of the top cover and an engagement pin 7a provided on a movable chassis 7 described later. And an engaging groove 2e.

Further, in FIG. 1, the outer circumference 2d of the top cover 2 is drawn over the entire circumference. The purpose of drawing the outer periphery 2d is to ensure the mechanical strength of the top cover 2.

1 and 3, a damper 4 for gently rotating the top cover 2 is attached to the side plate 3 with a screw 3c, and the side plate 3 is engaged with the above-described rotation fulcrum hole 2c of the top cover 2. The engaging shaft 3a is provided. In addition,
The side plate 3 includes a fixing portion 3b that is fixed to the main chassis 8.

Further, in the side plate 3 shown in FIG. 3, the engaging shaft 3a is
It is attached to the top cover 2 by being engaged with the rotation fulcrum hole 2c of the top cover 2 shown in FIGS. The fixing portion 3b has a screw hole (not shown), and the side plate 3 is fixed to the main chassis 8 (see FIGS. 2 and 3) with a screw.

The damper 4 attached to the side plate 3 has a gear portion 4a, and the gear portion 4a engages with the gear portion 2b of the top cover 2 described above to provide a damping effect when the top cover 2 is rotated, Turn 2 gently.

Further, an up spring 5 is attached to the top cover 2 and the side plate 3 to urge the top cover 2 to rotate in the opening direction (see FIG. 1).

Therefore, with the above-described structure, the top cover 2 can be rotated with respect to the side plate 3 about the rotation fulcrum hole 2c.

As described above, the outer periphery 2d is subjected to drawing over the entire periphery to secure mechanical strength, and the rotation fulcrum hole 2c serving as the rotation fulcrum of the top cover with respect to the side plate 3 is formed.
And a side plate 3 having an engagement shaft 3a that engages with the rotation fulcrum hole 2c of the top cover 2, and the engagement shaft 3a is provided in the rotation fulcrum hole 2c of the top cover 2. By attaching the side plate 3 to the top cover 2 by engaging with the side plate 3 and rotating the top cover 2 around the rotation fulcrum hole 2c with respect to the side plate 3, the shaft for securing the strength of the conventional top cover is eliminated. Has been realized.

Next, the operation from the insertion of the cassette to the completion of the tape loading will be described with reference to FIGS. 1, 2 and 3.

First, when the cassette is inserted into the cassette housing 1 and the top cover 2 is manually pushed down to the closed position, the down guide 1c positions the cassette at a predetermined position in the cassette housing 1 and
The guide pin 1a provided on the link 1b of the cassette housing 1 is guided and moved along the guide hole 2a provided on the top cover 2.

The link 1b connected to the cassette housing 1 operates so as to push down (down move) the cassette housing 1 along with the movement of the guide pin 1a, and the cassette housing 1 is loaded at the reference position of the VTR mechanical portion. .

Next, when the cassette is loaded in the reference position, the top cover 2 is attached to the side plate 3 by the lock lever 9 urged by the coil spring 6.
The lock of the cassette is detected and the loading of the cassette is detected by the switch 11 that detects the loading of the cassette.

Then, when it is detected that the cassette is loaded in the reference position, a loading motor (not shown) for moving the movable chassis 7 starts driving. The movable chassis 7 starts to slide in the direction of arrow B in FIGS. 2 and 3 by driving the loading motor.

As described above, the down guide 1c provided in the cassette housing 1 is attached to the movable chassis 7 by the screw 1d, and the movable chassis 7 slides to move the cassette housing 1 into the same manner as in FIG.
Slide and move in the direction of arrow B.

Next, when the sliding movement of the movable chassis 7 is completed, the cassette is positioned at the regular position during the operation such as recording and reproducing, and the loading of the cassette is completed. By moving the movable chassis 7 in the direction of arrow B, as shown in FIG.
The shaft 7a attached to the movable chassis 7 shown in FIG. 2 engages with the groove 2e of the top cover 2 to prevent the top cover 2 from floating.

The cassette ejection operation is almost the reverse of the loading operation. Also, the tape loading operation is
The start of the slide movement is started almost at the same time, and the end of the slide movement is completed almost the same time. The details of the tape loading operation are omitted because they are not the gist of the present invention.

As described above, according to the cassette loading apparatus of the present invention, it is possible to realize a conventional apparatus which does not require a shaft (separate member) for ensuring the mechanical strength of the top cover.

[0046]

According to the cassette loading device of the first aspect of the present invention, the shaft for securing the mechanical strength of the top cover, which has been conventionally required, is not required, and the device can be made thin and the cost can be reduced. And, with the top cover and the side plate connected, it is only necessary to fix the fixing portion provided on the side plate to the main chassis with a screw, and the connection between the top cover and the side plate and the fixing work to the main chassis can be easily done. A device with excellent workability can be realized.

According to the cassette loading apparatus of the second aspect of the present invention, since the top cover does not float after the cassette loading is completed, the performance and quality can be improved.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of a cassette loading device of the present invention.

FIG. 2 is a left side view of a VTR mechanical unit equipped with the cassette loading device of the present invention.

FIG. 3 is a right side view of a VTR mechanical section equipped with the cassette loading device of the present invention.

FIG. 4 is a perspective view of a VTR mechanical unit including a conventional cassette loading device.

FIG. 5 is a side view of a VTR mechanical section equipped with a conventional cassette loading device.

FIG. 6 is a diagram for explaining a conventional top cover.

[Explanation of symbols]

1, 11 cassette housing 1a Guide pin 1b link 1c Down guide 2,12 Top cover 2a Guide hole 2b Gear part 2c Rotating fulcrum hole 2d outer circumference 2e Engagement groove 3 side plates 3a Engagement shaft 4 damper 4a gear part 5 up spring 6 coil spring 7,17 Movable chassis 7a Engagement shaft 8,18 Main chassis

Claims (2)

(57) [Claims] A cassette housing for holding 1. A cassette, and a top cover for controlling the movement of engagement with the cassette housing in the cassette housing, said cassette housing in the cassette loading apparatus for sliding movement of the top cover The entire outer circumference is drawn and provided with a rotation fulcrum hole portion that serves as a rotation fulcrum of the top cover, and is fixed to the engagement shaft engaging with the rotation fulcrum hole portion and the main chassis. And a side plate having a fixing portion for connecting the side plate and the top cover by engaging the engaging shaft. 2. The top cover is provided with an engaging groove for preventing the top cover from floating after the cassette is completely loaded, and a movable chassis for slidingly moving the cassette housing is provided with an engaging pin for engaging with the engaging groove. The cassette loading device according to claim 1, further comprising: