JPS61178772A - Cassette mounting device - Google Patents

Abstract

PURPOSE:To prevent foreign matter from intruding into the device by arranging so that, at the time of cassette insertion, an oscillating panel is moved to substantially the same position as at the time of cassette mounting. CONSTITUTION:When a cassette holder 5 is driven to be moved forward in parallel, the oscillating panel 33 is turned counterclockwise with a hinge shaft 32 as a center. When the cassette holder 5 is turned while being moved forward, the oscillating panel 33 is further turned counterclockwise. When the cassette holder 5 continues to be turned, the oscillating panel 33 is turned in the reverse or clockwise direction so that the oscillating panel 33 is on the same level as the front surface of a main body 1 to cover an aperture part. In this manner, the oscillating panel 33 connected to a mounting block 3 is rotatably mounted to a fixed panel 31 fixed to the cassette holder 5, so that the aperture part 30 can be covered by the oscillating panel 33 at the cassette inserting position.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cassette loading device used in a magnetic recording/reproducing device such as a video tape recorder.

(Prior Art) Conventionally, magnetic recording and reproducing apparatuses have been proposed that include a cassette mounting device that positions the cassette in an upright position when the cassette is mounted. Such a cassette loading device will be explained with reference to FIGS. 5 to 9.

5 and 6 are a side view of a conventional cassette loading device and a plan sectional view showing its main parts, and FIGS. 7 to 9 are
The figure is a side view showing the progress of the operation.

In FIG. 5, a base 2 is formed on both sides of a main body 1 of the magnetic recording/reproducing apparatus, and a base 3 is fixed to the base 2.

For installation, two track rollers 8 and 9 of a support arm 7, which has a support shaft 6 implanted at its tip, which rotatably supports a cassette holder 5 containing a cassette 4 on both sides thereof, are fitted to the stand 3. two guide slots lO and 11 that meet,
Guide rails 13 for guiding guide bins 12 formed on projections at both ends of the rear surface of the cassette holder 5 are formed horizontally.

Furthermore, the left side installation is 1. Input gears 15 that drive deformable gears 14, which will be described later, are fixed to both sides of the cassette holder 5, and are rotatably attached to fixed shafts 3a implanted in the base 3. Although not shown in FIG. connected to the motor.

For mounting on both the left and right sides, gears 17 are fixed to both ends of a rotating shaft 16 that is rotatably mounted on the stand 3 (the right side is not shown).
It meshes with the input gear 15 described above and distributes driving force to the drive gear trains on both the left and right sides. Furthermore, the left and right installations are on stand 3.
The two idle gears 18 and 19 for power relay and the drive gear 20 that meshes with the deformable gear 14 are mounted on the base 3.
The fixed shaft 3b is implanted in the fixed shaft 3b.

3c and 3d, respectively, so as to be rotatable.

Furthermore, a retaining roller 21 that supports a component force perpendicular to the pitch line that is generated when the drive gear 20 transmits power to the deformation gear 14 is installed on the stand 3 on the opposite side of the deformation gear 14. It is rotatably mounted on a fixed shaft 3c.

The deformable gears 14 fixed to both sides of the cassette holder 5 are mounted parallel to the guide slots 10 and 11 of the base 3 and the guide rail 13 when the cassette holder 5 is in the cassette-mounted state shown in FIG. It is composed of a straight portion 14a, an arcuate portion 14b centered on the support shaft 6, and an arcuate portion 14c that smoothly connects these two portions. Further, the inner wall surface of the deformable gear 14 is formed parallel to each pitch line, and serves as a track 22 on which the above-mentioned retaining roller 21 rolls.

Although it has been explained that the deformable gear 14 is fixed to the cassette holder 5, as shown in FIG.
A bearing portion 14d is formed that projects forward and backward, and is rotatably fitted to the support shaft 6 on the inner diameter surface of the bearing portion 14d.
It is fixed to the cassette holder 5 with the outer diameter surface of the bearing portion 14d as a reference.

Note that there is a transparent window (not shown) on the front of the cassette holder 5.
A front panel 23 having a diameter is fixed to the front panel 23.

Furthermore, although it has been explained that the guide slots 10 and 11 of the table 3 and the guide rail 13 are installed horizontally, the cassette 4 shown in FIG. 7 is installed. Reel stand 24 arranged horizontally
It is formed substantially parallel to the rotation center line 24a of. Therefore, the support arms 7 on both the left and right sides guided by these
The support shaft 6 of the cassette 4 can be moved almost parallel to the rotation center line 24a of the reel stand 24.Returning to FIG. However, when the illustrated cassette is installed, a lid opening device (not shown) is installed in the main body 1.
The opening is exposed.

In FIG. 9, a claw portion 2 is attached to a fixed shaft 5a implanted inside the left and right side walls of the cassette holder 5 to prevent the cassette 4 from falling off.
A locking arm 26 having a tip 6a is rotatably mounted. The locking arm 26 has an engagement pin 26b attached to its end that engages with a notch 27a at the tip of the relay arm 27 rotatably attached to the above-mentioned support shaft 6, and a protrusion formed in the center. Tension coil spring 2 at 26c
8 is installed.

It is always biased in the locking direction.

The relay arm 27 has a bent portion 27b formed at its rear end,
It engages with the support arm 7 and functions to release the locked state of the locking arm 26. Incidentally, a through hole 29 is formed in the cassette holder 5 and the deformable gear 14 fixed to the cassette holder 5 for engaging the relay arm 27 and the locking arm 26 disposed on both sides thereof.

FIG. 6 is a plan cross-sectional view showing details of the drive section of the cassette holder 5, in which the relay arm 27 and the deformable gear 14 fixed to the cassette holder 5 are rotatable on the support shaft 6 implanted in the support arm 7. The fixed shaft 3 installed on the base 3 is used for installation.
A drive gear 20 and a retainer roller 21 rotatably mounted on the drive gears d and 3e are arranged with the deformation gear 14 in between. The notch 27a at the tip of the relay arm 27 is located at the center of the through hole 29 and the engagement pin 26 at the end of the locking arm 26.
b and the bent portion 27b at the rear end are engaged with the support arm 7, respectively.

Further, the drive gear 20 meshes with the idle gear 19.

The operation of the cassette loading device constructed in this way will be explained with reference to FIGS. 5 and 7 to 9.

FIG. 5 is a side view showing the state in which the cassette 4 is mounted on the reel stand 24. When the ejection button (not shown) is operated in this state, the drive motor (not shown) begins to rotate, and the input gear 15 connected to the drive motor rotates clockwise.

The rotation of the input gear 15 is transmitted to the gear 17, and is transmitted to the gear train on the back side by the rotating shaft 16 on which the gear 17 is attached. On the other hand, on the water side of the figure, idler gears 18 and 1
9 to drive gear zO, causing drive gear 20 to rotate clockwise.

The rotation of the drive gear 20 is based on the track 22 on the back side and the roller 2
The cassette holder 5 is transmitted to the deformable gear 14 supported by the deformable gear 14 through its straight portion 14a, and the deformable gear 14 is fixed to the cassette holder 5.
The cassette holder 5 is supported by the track rollers 8 and 9 guided by the guide rail 13 and by the guide pin 12, and is rotated approximately 20 mm parallel to the rotation center line 24a of the reel stand 24.
After moving nwa and taking out the cassette 4 from the reel stand 24, the cassette 4 is further moved forward about 5nn to reach the state shown in FIG.

Note that the cassette 4 is removed from the reel stand 24, and the open opening is covered with the lid 25.

When the drive gear 19 further rotates, the meshing portion of the drive gear 19 shifts from the linear portion 14a of the deformation gear 14 to the circular arc portion 14c, causing the deformation gear 14 to rotate counterclockwise.

While the deformable gear 14 and the cassette holder 5 fixed thereto rotate, the track rollers 8 and 9 at the distal and central portions of the support arm 7 move into the guide slots 10 and 1, respectively.
1 and move forward about 9mm.

It is rotated counterclockwise by about 19 degrees to reach the state shown in FIG. At this time, the retaining roller 21 supports the deformation gear 14 on its track 22 and plays the role of maintaining the rotational position of the cassette holder 5.6 When the drive gear 20 further rotates, the drive gear 20 moves between the deformation gears 14 and 14. Moving from the circular arc portion 14c to the circular arc portion 14b centered on the support shaft 6, the deformable gear 14 and the cassette holder 5 fixed thereto are rotated counterclockwise while moving forward. At this time, as the track roller 9 descends along the slope 11a at the front end of the guide slot 11, the support arm 7 is rotated counterclockwise, and the support shaft 6 at its tip is lifted by about 4 meters.

The opening of the cassette 4 is approximately 10 mm in the attachment/detachment direction shown by arrow A.
``It will be in the state shown in Figure 9 where it will be facing downward.

On the other hand, the bent portion 27b of the relay arm 27 attached to the support shaft 6 engages with the support arm 7, and the tension coil spring 28
The locking arm 26 that was holding down the bottom of the cassette 4 with the action of
Rotate the claw part 26a counterclockwise to remove it from the cassette 4.

In this state, the drive motor stops. At the stage when the movement of the cassette mounting device has stopped, the cassette 4 can be mounted and removed in the direction of arrow A.

Although the operation from the cassette loading device to the cassette loading/unloading position has been explained in sequence above, the operation from the cassette loading/unloading position to the cassette loading position is performed in a completely reversed manner, so the explanation will be omitted.

(Problems to be Solved by the Invention) However, in the above configuration, as shown in FIG. This opening 30 is not only unsightly, but also
There is a problem in that foreign matter can enter the magnetic recording/reproducing device.

The present invention solves the above problems and provides a cassette loading device in which no opening is formed between the upper end of the front panel 23 of the cassette holder 5 and the main body 1 at the cassette loading position. .

(Means for Solving the Problems) In order to solve the above problems, the present invention includes a fixed panel fixed to the cassette holder, and a swinging panel rotatably attached to the fixed panel via a hinge shaft. This panel constitutes a front panel, and is connected to the above-mentioned swing panel by a support arm rotatably attached to the main body of the device.

(Function) According to the above-described structure, when the cassette is loaded, the fixed panel and the swinging panel become flush and cover the opening for the cassette loading device formed on the front surface of the main body of the magnetic recording/reproducing device. When loading the cassette holder, the swinging panel bends around the hinge axis to cover the upper opening of the cassette holder. .

(Example) Embodiments of the present invention will be explained with reference to FIGS. 1 to 4.

FIG. 1 is a side view of the cassette loading device according to the present invention;
4 through 4 are side views showing the progress of the operation.

In FIG. 1, the lid 25 of the cassette 4 attached to the reel stand 24 is opened by a lid opening device (not shown), and the opening thereof is opened. A fixed panel 31 is fixed to the front surface of the cassette holder 5 containing the cassette 4, and a swing panel 33 is rotatably mounted on the upper end of the fixed panel 31 via a hinge shaft 32. The protrusions and attachment of the swinging panel 33 are carried out by support shafts 3 installed at the upper front end of the stand 3.
A support arm 34 is rotatably attached to both f and 34a.

The driving device for the cassette holder 5 other than the above description is the same as that shown in FIG. 5. Incidentally, the mounting is such that the pedestal 3 is formed inside the main body 1 and fixed to the base 2, which is also the same as that shown in FIG.

The operation of the cassette loading device constructed as described above will be explained with reference to FIGS. 1 to 4.

FIG. 1 shows the cassette mounted, in which the cassette 4 is attached to the reel stand 24, and the fixed panel 31 fixed to the cassette holder 5 and the swinging panel 33 connected thereto via the hinge shaft 32 are on one plane. and is flush with the front surface of the main body 1.

When the cassette holder 5 is driven and moves forward in parallel,
The swinging panel 33 rotates counterclockwise about the hinge shaft 32 and enters the state shown in FIG. 2.

Next, when the cassette holder 5 rotates while moving forward, the swing panel 33 also rotates further counterclockwise, resulting in the state shown in FIG. 3.

As the cassette holder 5 continues to rotate, the swing panel 33 rotates clockwise in the opposite direction, and when it reaches the cassette loading position shown in FIG. and cover the opening.

Fixed panel 3 fixed to cassette holder 5 as described above
First, by rotatably attaching the swinging panel 33 connected to the base 3, the opening 30 can be covered by the swinging panel 33 at the cassette loading position.

(Effects of the Invention) According to the present invention, the swinging panel, which is rotatably attached to the fixed panel fixed to the cassette holder via the hinge shaft and further connected to the base and the support arm, can be attached to the cassette holder. Both the cassette loading position and the cassette loading position are located at almost the same position forming one plane with the front of the main body, so there is no opening, which not only looks good but also prevents foreign matter from entering the device. It has a remarkable effect on preventing

Furthermore, since the relative position of the swinging panel is regulated by the fixed panel and the mounting base, the swinging panel does not swing around during the cassette mounting operation, resulting in excellent operability.

[Brief explanation of drawings]

1 to 4 are side views showing the main parts of the cassette loading device according to the present invention and the progress of its operation, FIG. 5 is a side view of a conventionally proposed cassette loading device, and FIG. 6 is a drive section thereof. FIGS. 7 to 9 are side views for explaining the progress of the operation. 1...Main body, 2...Base, 3...Mounting stand,
3a, 3b, 3c, 3d, 3e, 5a-fixed axis, 3f,
6, 34a...Support shaft, 4...Cassette, 5
...Cassette holder, 7,34...Support arm, 8,9...Track roller, 10.11.
・Guidance slot. Ha... Inclined portion, 12... Guide pin, 13...
- Guide rail, 14... Deformed gear, 14a... Straight line part, 14b, 14c... Arc part, 14d... Bearing part, 15... Input gear, 16... Rotating shaft, 17.・・・
Gear, 18.19... Idle gear, 20... Drive gear, 21... Back roller, 22... Track, 23...
Front panel, 24... Reel stand, 24a River rotation center line, 25... Lid, 26... Locking arm, 26a
...Claw portion, 26b...Engagement pin, 26c...Protrusion, 27...Relay arm, 27a...Notch, 27b
...Bending portion, 28...Tension coil spring, 29...
- Through hole, 30... Opening, 31... Fixed panel, 32... Hinge shaft, 33... Swinging panel. Figure 1 Figure 2 Figure 3 Figure 5 E6 Figure 7 24 Power S

Claims (1)

[Claims] The front of the cassette holder is covered by a fixed panel fixed to the cassette holder that stores the cassette, and a swinging panel rotatably attached to this via a hinge shaft, which is rotatably pivoted to the main body of the device. The support arm rotatably supports the swinging panel, and when the cassette is installed, the fixed panel and the swinging panel form one plane together with the front surface of the magnetic recording and reproducing device,
A cassette loading device characterized in that, when loading a cassette, the swing panel moves to approximately the same position as when loading the cassette.