JPS61178773A - Cassette mounting device - Google Patents

Abstract

PURPOSE:To arrange so that no aperture part is formed with an oscillating panel covering the space between a fixed panel and a main body by constituting a front panel by the fixed panel secured to a cassette holder and the oscillating panel connected to the fixed panel by a hinge shaft. CONSTITUTION:A cassette 4 mounted on a reel block 24 has a cover 25 opened by a cover opening device so that its aperture is opened. The fixed panel 31 is secured to the front side of the cassette holder 5 containing the cassette 4 and the oscillating panel 33 is rotatable mounted to its upper end by means of a hinge shaft 32. The one end of a tension coil spring 34 attached to a boss on the oscillating panel 33 is secured to the cassette holder 5 so that the panel 33 is energized counterclockwise towards the inside of the device. A guide boss 5b and a guide board 1a are integrally formed with the cassette holder 5 and with the front inner side of the main body 1 so that the panels 33, 31 are on the same level.

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, bases 2 are formed on both sides inside a main body 1 of the magnetic recording/reproducing apparatus, and a base 3 is fixed to these bases.

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 matching guide slots 10 and 11;
Guide rails 13 for guiding guide pins 12 formed on protrusions at both ends of the rear surface of the cassette holder 5 are formed horizontally.

Furthermore, an input gear 15 that drives a deformable gear 14 (described later) fixed to both sides of the cassette holder 5 is mounted on the left side base 3, and is rotatably mounted on a fixed shaft 3a implanted in the base 3. Although not shown in the figure, it is connected to a drive 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 and the guide rail 13 of the stand 3 are installed horizontally, the reel stand 24 shown in FIG.
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 can move substantially parallel to the rotation center line 24a of the reel stand 24.

Returning to FIG. 5, the cassette 4 is always covered with a lid 25 pivotally attached to its side.

When the illustrated cassette is installed, the opening is exposed by being opened by a lid opening device (not shown) disposed in the main body 1.

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 is.

The engagement pin 2 engages with the notch 27a at the tip of the relay arm 27, which is rotatably attached to the above-mentioned support shaft 6 at its end.
6b is attached, and a protrusion 26c formed in the center
A tension coil spring 28 is attached to the.

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, in terms of drawing quantity, idle gears 18 and 1
9 to the drive gear 20, causing the 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 the cassette 4 by m and taking out the cassette 4 from the reel stand 24, the cassette 4 is further moved forward by about 5 m to reach the state shown in FIG. In addition,
The cassette 4 is removed from the reel stand 24, and the open opening is covered with a lid 25.

When the drive gear 20 further rotates, the meshing portion of the drive gear 20 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, move forward about 9 degrees and counterclockwise about 1 point.
It is rotated by 9 degrees and becomes the state shown in FIG. At this time, the retainer roller 21 supports the deformable gear 14 on its track 22 and serves to maintain the rotational position of the cassette holder 5.

When the drive gear 20 further rotates, the drive gear 20 moves from the circular arc portion 14c connecting the deformation gears 14 to the circular arc portion 14b centered on the support shaft 6, and moves the deformation gear 14 and the cassette holder 5 fixed thereto forward. while rotating it counterclockwise. At this time, as the track roller 9 descends along the inclined portion 11a at the front end of the guide slot 11, the support arm 7 is rotated counterclockwise, and the support shaft 6 at the tip thereof is lifted by about 4 degrees.

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 Fig. 5, in which it is 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
Locking arm 2 that was holding down the bottom of cassette 4 with the action of
Rotate the claw portion 26a of No. 6 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. The panel constitutes a front panel, and a tension spring that urges the swinging panel toward the inside of the device and a guide board that regulates the upper end position of the swinging panel are installed in 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 magnetic recording/reproducing device. When loading the cassette holder, the swing panel bends around the hinge shaft and is regulated by the guide board 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 swinging panel 33 has one end of a tension coil spring 34 attached to its protrusion fixed to the cassette holder 5, and is biased counterclockwise toward the inside of the apparatus. The cassette holder 5 is integrally formed with a guide protrusion 5b so that the swing panel 33 and the fixed panel 31 are flush with each other, and a guide board 1a is integrally formed inside the front surface of the main body 1.

The driving device for the cassette holder 5 other than the above description is the same as that shown in FIG. 5. In addition, for installation, the stand 3 is fixed to the base 2 formed inside the main body 1.

This is also the same as 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.

The cassette holder 5 is driven and moves forward in parallel,
The swing panel 33 is supported by the guide protrusion 5b of the cassette holder 5 and maintains a state in which it forms one plane with the fixed panel 31.

Next, when the cassette holder 5 rotates counterclockwise while moving forward, the upper end of the swing panel 33 comes into contact with the guide board 1a formed inside the main body 1, as shown in FIG.

As the cassette holder 5 continues to rotate, the swing panel 33 rotates clockwise around the hinge shaft 32 along the guide board 1a due to the tensile force of the tension coil spring 34.
When the swing panel 33 reaches the cassette loading position shown in the figure, the swing panel 33 covers the space between the fixed panel 31 and the main body 1 without creating an opening.

As described above, according to the present invention, the front panel is composed of the fixed panel 31 fixed to the cassette holder 5 and the swinging panel 33 connected to this via the hinge shaft 32, so that the cassette loading position can be adjusted. The swing panel 33 covers the space between the fixed panel 31 and the main body 1, so that no opening is created.

(Effects of the Invention) According to the present invention, the swinging panel rotatably attached to the fixed panel fixed to the cassette holder via the hinge shaft, together with the fixed panel when the cassette holder is in the cassette mounting position. 1 It is on the same plane as the front of the main body, and when it is in the cassette loading position, it is covered so that there is no opening between the fixed panel that has moved once and the main body, and it has an excellent appearance. This has a remarkable effect in preventing the intrusion of foreign matter.

[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...Body, Ia...Information board, 2...
・Base, 3... Mounting is on stand, 3a, 3b, 3c, 3d
, 3e, 5a-fixed shaft, 4... cassette, 5.
...Cassette holder. 5b... Guide projection, 6... Support shaft, 7... Support arm, 8, 9... Track roller, 10
．． 11... Guide slot, 11a... Inclined part, 12
... Guide pin, 13 ... Guide rail, 14 ... Deformed gear, 14a ... Straight section, 14b, 14c ... Arc part, 14d ... Bearing part, 15 ... Input gear, 16
···Axis of rotation. 17...Gear, 18.19...Idle gear, 2
0... Drive gear, 21... Backup roller, 22...
Orbit, 23...Front panel, 24...Reel stand, 24a...Rotation center line, 25...Lid, 26...
- Locking arm, 26a...claw portion, 25b...engaging pin, 26c...protrusion, 27...relay arm, 27a
...notch, 27b...bending portion, 28, 34.
...Tension coil spring, 29...Through hole, 30...
・Opening, 31...Fixed panel, 32...Hinge axis,
33... Swing panel. Patent applicant Matsushita Electric Industrial Co., Ltd. Figure 1 Figure 2 Figure 5 Figure 6 Figure 7 Figure 24... Lee II/Hi

Claims (1)

[Claims] The front of the cassette holder is covered with a fixed panel fixed to the cassette holder that stores the cassette, and a swinging panel rotatably attached to this via a hinge shaft, and the swinging panel is moved inside the main body by a spring. When the cassette is loaded, the fixed panel and the swinging panel form one plane together with the front surface of the magnetic recording/reproducing device, and when the cassette is inserted, the swinging panel moves to almost the same position as when the cassette is mounted. A cassette loading device characterized by being configured as follows.