JP3397515B2 - Cassette mounting device and recording or reproducing device provided with the cassette mounting 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 mounting device for raising and lowering a cassette holder for accommodating a cassette, and a recording or reproducing device such as a VTR equipped with the cassette mounting device.

[0002]

2. Description of the Related Art FIGS. 8 and 9 are side views of a cassette mounting device which the applicant of the present invention has already proposed. Reference numeral 101 is a cassette, and 102 is a cassette holder into which the cassette 101 is inserted. Reference numerals 103 and 104 denote a pair of levers forming a link, which are rotatably connected by a shaft 105.
One end of the lever 104 is rotatably supported by the chassis 107 by the shaft 106, and the other end is slidably engaged with the shaft 109 of the holder 102 by the elongated hole 108. Lever 10
One end of 3 is a shaft 111 of the chassis 107 due to the long hole 110.
Is slidably engaged with, and the other end is rotatably supported by the holder 102 by a shaft 112. Reference numeral 113 is a spring for urging upward, which is stretched between the lever 104 and a lock lever described later.

A lock lever 114 is rotatably attached to the side plate of the holder 102 via a shaft 115.
The lock lever 114 has the spring 11 locked at one end.
It is urged to rotate in the clockwise direction by 3. A lock member 116 and a lock detection switch 117 are provided on the side plate of the chassis 107, and the locked portion 114a of the lock lever 114 can be engaged with the lock member 116 and can press the lock detection switch 117.

In FIG. 8, when the cassette 101 is inserted into the holder 102 and the holder 102 is pressed, the holder 102 is lowered by the linking action of the levers 103 and 104, and the lock lever 114 locks the lock member, as shown in FIG. Engage 116. Then, when the lock at the lowered position is released, the levers 103 and 104 are moved by the spring 113.
Is operated to raise the holder 102.

In this cassette mounting device, the elongated hole 110 of the lever 103 is connected to the shaft 1 of the chassis 107.
The wide portion 110a for engaging with the slot 11 has the long hole 1
It is formed on the tip side of 10. That is, the wide portion 110a
Has a size that allows the head of the shaft 111 to be inserted therethrough.

[0006]

However, in the above-mentioned example, the wide portion 11 of the long hole 110 is used for assembly.
When engaging the shaft 0a with the shaft 111, the lever 103 is bent inward, and the wide portion 110a is inserted through the head of the shaft 111 to be assembled, which is not sufficient in terms of improving the assemblability. Further, as shown in FIG. 9, when the holder 102 is in the lowered state,
Since the tip of the lever 103 projects more than the chassis 107, the size is not sufficient.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a cassette mounting device which improves the assemblability of a cassette holder with respect to a chassis and can be downsized, and a recording or reproducing device equipped with this cassette mounting device. .

[0008]

In order to achieve the above object, the present invention provides a cassette holder into which a cassette is inserted and the cassette holder can be moved up and down between a raised position and a lowered position with respect to a chassis. In a cassette mounting device having a link mechanism for supporting and a slide engaging portion including a cam groove and a shaft for slidably engaging the link with the chassis, the cam groove includes a narrow portion and a wide portion. And the wide portion is formed from a first flat surface portion where the narrow width portion is formed to a second flat surface portion that is formed by a bent portion that is formed continuously to the first flat surface portion. It is characterized by being

Further, the present invention is characterized in that a wide portion formed on the second flat surface portion is provided at an end portion of the cam groove.

The recording or reproducing apparatus according to the present invention is
The cassette mounting device includes a cassette mounting device, a rotating drum device, and a chassis having at least the rotating drum device, the cassette mounting device, and a reel stand, and the cassette holder in which a tape cassette is inserted is lifted by the cassette mounting device. The tape cassette is lowered from the position to the lowered position, the tape cassette is mounted on the reel stand of the chassis, and then the tape is pulled out from the tape cassette and wound around the drum peripheral surface.

Further, a recording or reproducing apparatus according to the present invention comprises the cassette mounting device, the rotary drum device, a first chassis to which at least the rotary drum device is mounted, at least the cassette mounting device and a reel stand. And a second chassis configured to be slidable with respect to the first chassis, wherein the cassette holder in which the tape cassette is inserted is lowered from the raised position to the lowered position by the cassette mounting device, After mounting the tape cassette on the reel stand of the second chassis, the second chassis is slid relative to the first chassis in the direction of the rotary drum device, whereby the rotary drum is rotated. At least a part of the device is relatively inserted into the opening of the tape cassette and the tape cassette Characterized by being configured so wound around the drum circumference is pulled out Luo tape.

[0012]

According to the present invention constructed as described above, a wide portion is provided in a part of the cam groove in the slide engagement portion between the link and the chassis, and the wide portion forms the narrow cam groove. Since it is formed on the first flat surface portion and the second flat surface portion formed by the bent portion continuously formed on the first flat surface portion, the large diameter portion and the small diameter portion of the shaft are respectively formed. Engaging the wide part of the second flat part and the wide part of the first flat part,
The small diameter portion of the shaft can be slidably engaged with the cam groove. That is, when the cassette holder is attached to the chassis, the link can be laterally assembled to the chassis without bending the links inward.

Further, by providing the wide portion formed on the second flat surface portion at the end portion of the cam groove, for example, when the cam groove is provided on the link, when the cassette holder is lowered, Since the end portion does not project from the chassis or the projecting amount is small, the size can be reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a cassette mounting apparatus according to the present invention and a recording or reproducing apparatus equipped with the same are applied to a VTR will be described below with reference to FIGS. 1 to 3
Is a side view of a VTR equipped with a cassette loading device, FIG. 4 is a plan view of the VTR, FIG. 5 is a plan view of the cassette loading device,
FIG. 6 is an exploded perspective view showing a slide engagement portion between the link and the chassis, and FIG. 7 is an enlarged view of a portion A of the cassette mounting device of FIG.

1 to 5, 1 is a cassette, 2 is a cassette holder into which the cassette 1 is inserted, and 3 is a holder 2.
Is a reinforcing beam (member) for connecting both side plates of the. Reference numerals 5 and 6 are a pair of levers that constitute a link, and the links on both sides are symmetrically arranged. Reference numeral 4 denotes a shaft which connects one ends of the levers 5 on both sides to rotatably support the side plate of the holder 2, and 7 denotes a shaft which rotatably connects the levers 5 and 6. A cam structure 8 is provided at one end of the lever 6, and is slidably engaged with a shaft 9 provided on a side plate of the holder 2.

Reference numeral 16 is a movable substrate as a second chassis. Reference numeral 10 denotes a shaft provided on a side plate of the movable substrate 16, which is slidably engaged with a cam structure 11 provided on the lever 5. A shaft 12 is provided at the other end of the lever 6 and is rotatably supported by the side plate of the movable substrate 16.

Numeral 13 is a spring for urging the holder 2 to the raised position. The spring 13 on one side is stretched between the lever 6 and a lock lever described later, and the spring 13 on the other side is the lever 6 and the holder. It is stretched between the two side plates.

1 to 3, a lock lever 14 is rotatably attached to one side plate of the holder 2 via a shaft 15. The lock lever 14 is urged to rotate in the clockwise direction by the spring 13 locked at one end. A lock member 17 and a lock detection switch 18 are provided on the side plate of the movable substrate 16, and the locked portion 14a of the lock lever 14 can be engaged with the lock member 17 and can press the lock detection switch 18. Is.

A gear portion 30 is integrally provided on the slide engagement side of the lever 5, and the gear portion 30 meshes with a damper 31 provided on a side plate of the movable substrate 16. The damper 31 applies a load at the time of raising the holder by viscous resistance of the built-in oil during the rotation operation thereof, and smoothes the raising operation.

Next, as shown in FIGS. 1 to 3 and 6,
A bent portion 11b is formed at the tip of the lever 5. A wide portion 11a for insertion is formed at the tip of the cam groove 11 of the lever 5, and the wide portion 11a continues to the bent portion 11b as a wide portion 11a '. That is, the wide portion 11a is formed as a flat portion (first flat portion) forming the narrow cam groove 11, and the wide portion 11a 'is formed as a bent portion 11b (second flat portion). When attaching the holder 2 to the movable substrate 16,
By engaging the shaft 10 with the wide portions 11a and 11a ', the shaft 10 and the cam groove 11 can slide. A similar shape is provided on the tip of the lever 5 on the other side.

Further, as shown in FIGS. 1 to 3 and 7,
The lock lever 14 has an arrow a on the lock lever 14.
A restriction portion 14b that restricts the floating in the direction is provided. When the holder 2 is raised, the lever 6 is clamped by the restricting portion 14b, and the free movement of the lock lever 14 is relatively restricted.

Further, as shown in FIGS. 3 to 7, the holder 2
On the bottom plate of the embossing 19 toward the movable substrate 16 direction.
Are formed. The embossment 19 is formed on the same axis as the rotation center 21a provided on the movable substrate 16 of the arm 21 on which the tape guide post 20 is mounted.
This embossment 19 can regulate the vertical deviation of the tape guide post 20. Since the embossment 19 is aligned with the rotation center 21a, the arm 2
No unnecessary moment is added to 1.

Next, as shown in FIG. 4, the movable substrate 1
6 is provided with a reel stand 22 on which the cassette 1 is mounted, and the movable board 16 is slidable in the front-rear direction on a fixed board 40 which is a first chassis. A rotary drum device 41 is arranged on the fixed substrate 40 in an inclined manner.

In the above structure, as shown in FIG.
When the cassette 1 is inserted into the holder 2 and the holder 2 is pressed from above, the cam groove 11 of the lever 5 and the cam groove 8 of the lever 6 are moved along the shaft 10 of the movable substrate 16 and the shaft 9 of the holder 2, respectively. While moving, the holder 2 is lowered.

As the holder 2 descends, the lock lever 14
The locked portion 14a comes into contact with the lock member 17 of the movable substrate 16, the lock lever 14 is rotated counterclockwise, and the spring 13 is charged. The charge is released when passing the corner of the lock member 17, the lock lever 14 is rotated clockwise, and the locked portion 14a is engaged with the lock member 17. At the same time, the locked portion 14
a presses the lock detection switch 18.

In this way, the holder 2 is locked in the lowered position as shown in FIG. In this state, the holder 2
The inner cassette 1 is mounted on the reel base 22 of the movable substrate 16, and the cassette 1 is pressed by the cassette pressing spring 2a (see FIG. 5) on the upper plate of the holder 2.

Next, the lock detection switch 18 is turned on.
As shown in FIGS. 3 and 4, the movable substrate 16 is slid in the direction of the rotary drum device 41 relative to the fixed substrate 40, and a part of the rotary drum device 41 relatively opens the cassette 1. Inserted into the covered opening. By inserting the drum and pulling out the tape 24 from the cassette 1 by the tape guide post 23 and the like, the tape 2
4 is spirally wound around the drum peripheral surface of the rotary drum device 41, and a predetermined tape path is formed. Then, the tape 24 is run, and desired recording or reproducing is performed on the tape 24 by the rotary head or the like.

Next, when an eject command is issued, as shown in FIG.
2, as shown in FIG. 2, the movable substrate 16 is slid in the direction away from the rotary drum device 41, and the tape 24 is unloaded. Then, in FIG. 2, when the lock lever 14 is rotated counterclockwise to release the lock, as shown in FIG. 2 to FIG.
The levers 5 and 6 are actuated in the opposite manner by the force of, and the holder 2 is raised so that the cassette 1 can be taken out of the holder 2.

In the present apparatus constructed and operated as described above, when the holder 2 is mounted on the movable substrate 16 in the holder-raised state shown in FIG. 1, the shaft 10 as shown in FIG.
By engaging the large diameter portion 10a and the small diameter portion 10b of the shaft 10 with the wide portion 11a 'and the wide portion 11a of the cam groove 11 of the lever 5, respectively, the small diameter portion 10b of the shaft 10 is engaged with the cam groove 11a.
It can be slidably engaged with a. That is, the movable substrate 16 can be assembled laterally without bending the lever 5 inward.

Further, in the holder descending state of FIG. 3,
By the bent portion 11b at the tip of the lever 5, the movable substrate 16
Since the amount of protrusion of the tip of the lever 5 from the inside is small, the size can be reduced. Of course, a configuration in which the tip of the lever 5 does not protrude is also possible. Further, the bent portion 11b
Thus, the strength of the lever 5 can be improved at the same time.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various effective modifications and applications are possible based on the technical idea of the present invention. For example, in the cassette mounting device of the embodiment,
Although the shaft is provided on the chassis side and the cam groove is provided on the lever side of the holder, conversely, the shaft may be provided on the lever side and the cam groove may be provided on the chassis side. Further, the VTR of the embodiment has been described as having the movable chassis, but it may be a general recording or reproducing apparatus having only a fixed chassis.

[0032]

As described above, according to the cassette mounting apparatus of the present invention, a part of the cam groove is formed in the slide engaging portion including the cam groove and the shaft for slidably engaging the link with the chassis. And a second flat surface formed by a first flat portion having a narrow cam groove formed therein and a bent portion formed continuously with the first flat portion. When the cassette holder is attached to the chassis, it is possible to improve the assemblability because the cam groove and the shaft can be engaged with each other without bending the link inward, for example. Further, by providing the bent portion at the end of the cam groove, for example, the link can be downsized, so that the overall size and weight of the device can be reduced. Furthermore, by using such a cassette mounting device, it is possible to improve the assembling property and reduce the size and weight of a recording or reproducing device such as a VTR.

[Brief description of drawings]

FIG. 1 is a side view of a VTR equipped with a cassette mounting device according to an embodiment of the present invention in a holder raised position.

FIG. 2 is a side view of the VTR at a holder lowering position in the above embodiment.

FIG. 3 is a side view in a recording or reproducing state in which the movable substrate of the VTR in the above-mentioned embodiment is moved.

FIG. 4 is a plan view in a recording or reproducing state in which the movable substrate of the VTR in the above-mentioned embodiment is moved.

FIG. 5 is a plan view of the cassette mounting device in the above embodiment.

FIG. 6 is an exploded perspective view showing a slide engagement portion between a link and a chassis in the above embodiment.

7 is an enlarged view of a portion A of the cassette mounting device of FIG. 5 in the above embodiment.

FIG. 8 is a side view of the previously proposed cassette mounting device in a holder rising position.

FIG. 9 is a side view of the cassette mounting device in a holder lowered position.

[Explanation of symbols]

1 cassette 2 cassette holder 5, 6 lever 10 axes 10a large diameter part 10b small diameter part 11 Cam groove 11a, 11a 'wide part 11b bending part 13 Lifting spring 14 Lock lever 16 Movable board (second chassis) 17 Lock member 22 reel stand 24 tapes 40 Fixed board (second chassis) 41 Rotating drum device

Claims (4)

(57) [Claims] 1. A cassette holder into which a cassette is inserted, a link mechanism for supporting the cassette holder so that the cassette holder can move up and down between a raised position and a lowered position, and the link is slidable with respect to the chassis. In a cassette mounting device having a cam groove and a slide engaging portion formed of a shaft, the cam groove includes a narrow portion and a wide portion, and the wide portion is formed with the narrow portion. A cassette mounting device, characterized in that the cassette mounting device is formed from a first flat surface portion to a second flat surface portion formed by a bent portion formed continuously with the first flat surface portion. 2. The cassette mounting apparatus according to claim 1, wherein a bent portion formed on the second flat surface portion is provided at an end portion of the cam groove. 3. A cassette mounting device according to claim 1, a rotary drum device, and a chassis having at least the rotary drum device, the cassette mounting device and a reel stand, wherein a tape cassette is inserted. The cassette holder is lowered from an ascending position to a descending position by the cassette mounting device to mount the tape cassette on the reel stand of the chassis, and then the tape is pulled out from the tape cassette and wound around the drum peripheral surface. A recording or reproducing device characterized by the above. 4. The cassette mounting device according to claim 1, a rotary drum device, a first chassis to which at least the rotary drum device is mounted, and at least the cassette mounting device and a reel stand. A second chassis slidable with respect to one chassis, wherein the cassette holder into which the tape cassette is inserted is lowered from the raised position to the lowered position by the cassette mounting device, After mounting the tape cassette on the reel stand of the chassis, the second chassis is slid relative to the first chassis in the direction of the rotary drum device, so that at least one of the rotary drum devices is Part is relatively inserted into the opening of the tape cassette, and the tape is pulled out from the tape cassette. Recording or reproducing apparatus, characterized by being configured so wound around the ram circumference.