JP3202540B2 - 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 elevating and lowering a cassette holder in which a cassette is stored, and to 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 apparatus already proposed by the present applicant. 101 is a cassette, 102 is a cassette holder into which the cassette 101 is inserted. 103 and 104 are a pair of levers forming a link, which are rotatably connected by a shaft 105.
One end of the lever 104 is rotatably supported on a chassis 107 by a shaft 106, and the other end is slidably engaged with a shaft 109 of the holder 102 by a long hole 108. Lever 10
One end of the shaft 3 is formed by an elongated hole 110 so that the shaft
The other end is rotatably supported by the holder 102 by a shaft 112. Reference numeral 113 denotes an upward biasing spring stretched between the lever 104 and a lock lever described later.

A lock lever 114 is rotatably attached to a side plate of the holder 102 via a shaft 115.
The lock lever 114 is connected to the spring 11 locked at one end.
3 is urged to rotate clockwise. A lock member 116 and a lock detection switch 117 are provided on a side plate of the chassis 107. A locked portion 114 a 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, as shown in FIG. 9, the holder 102 is lowered by the link action of the levers 103 and 104, and the lock lever 114 is locked. And 116. When the lock at the lowered position is released, the levers 103 and 104 are actuated by the spring 113.
Is operated to raise the holder 102.

In this cassette mounting device, as shown in FIG. 10, a bush 118 is provided on a lock lever 114, and the bush 118 is
15 rotatably supported.

[0006]

However, in the above-described example, since the gap between the bush 118 provided on the lock lever 114 and the shaft 115 is usually set to 20 to 30 μm or less, during the lowering operation of the holder 102, When a lateral pressure (load from the side) is applied to the bush 118, the bush 118 is sandwiched between the side plate of the chassis 107 and the lever 104, and FIG.
, And the turning operation of the lock lever 114 may not be performed smoothly.

To prevent this, the chassis 10
If sufficient clearance is provided between the side plate 7 and the lever 104, or if the strength of the lever 104 is increased, sufficient requirements cannot be satisfied in terms of size and weight reduction. If the clearance is increased to increase the play, the degree of freedom of the lock lever 114 in the direction of the arrow b increases when the holder 102 is raised, and interference with the chassis 107 must be considered.

Accordingly, the present invention provides a cassette mounting device which stabilizes the operation of the lock lever during the raising and lowering operations of the cassette holder, and which can be reduced in size and weight and reduced in cost. To provide a recording or reproducing device.

[0009]

In order to achieve the above object, the present invention provides a cassette holder into which a cassette is inserted, and the cassette holder which can be raised and lowered with respect to a chassis between a raised position and a lowered position. A cassette mounting device including a supporting link mechanism and a lock lever provided on a side plate of the cassette holder and locked to the chassis at the lowered position, wherein the lock lever at least at the raised position of the cassette holder; And a restricting portion for restricting the vertical movement of said side plate by engaging said lock lever and a lever constituting said link mechanism.

Further, the present invention is characterized in that, in the cassette mounting device, the regulating portion is provided on the lock lever, and a lever constituting the link mechanism is engaged with the regulating portion.

Further, the recording or reproducing apparatus according to the present invention comprises:
The cassette mounting device, a rotary drum device, and a chassis having at least the rotary drum device, the cassette mounting device, and a reel stand, and the cassette holder in which a tape cassette is inserted is raised by the cassette mounting device. The tape cassette is mounted on a reel base of the chassis by being lowered from a position to a lowered position, 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 includes the cassette mounting device, a rotary drum device, at least a first chassis to which the rotary drum device is mounted, and at least the cassette mounting device and a reel base. 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 the tape cassette is mounted on a reel base of the second chassis, the second chassis is slid relative to the first chassis in the direction of the rotary drum device to thereby rotate the rotary drum. At least a part of the device is relatively inserted into an opening of the tape cassette, and the tape cassette is Characterized by being configured so wound around the drum circumference is pulled out Luo tape.

[0013]

According to the present invention constructed as described above, since the play of the lock lever is restricted by the restricting portion at least when the cassette holder is raised, the lock lever is operated stably when the cassette holder is lowered. be able to. Further, it is not necessary to increase the strength of the cassette holder or the chassis more than necessary for the pushing in the lateral direction, so that the size and weight of the apparatus can be reduced. Further, since the fitting between the lock lever and the shaft provided on the cassette holder can be loosened, the bush on the lock lever side can be eliminated, and the cost 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 provided 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 having a cassette mounting device, FIG. 4 is a plan view of the VTR, FIG. 5 is a plan view of the cassette mounting device,
FIG. 6 is a perspective view showing the restriction portion of the lock lever and the lever of the link, and FIG. 7 is an enlarged view of a portion A of the cassette mounting device of FIG.

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

Reference numeral 16 denotes a movable board serving as a second chassis. Reference numeral 10 denotes a shaft provided on a side plate of the movable substrate 16 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 on a side plate of the movable substrate 16.

Reference numeral 13 denotes a spring for biasing the holder 2 to the raised position. One side of the spring 13 is stretched between the lever 6 and a lock lever described later, and the other side of the spring 13 is connected to the lever 6 and the holder. It is stretched between the two side plates.

Next, in FIGS. 1 to 3, reference numeral 14 denotes a lock lever, which 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 14 a of the lock lever 14 can be engaged with the lock member 17 and can press the lock detection switch 18. It is.

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

Next, as shown in FIGS. 1 to 3, a wide portion 11a for insertion is formed at the tip of the cam groove 11 of the lever 5, and a bent portion 11b is formed at the tip. ing. That is, the wide portion 11a is continuous with the bent portion 11b as the wide portion 11a ', and the wide portion 11a is on the same plane and the wide portion 11a' is not the same as the plane on which the narrow cam groove 11 is formed. It is configured in a plane. Holder 2
When the is mounted on the movable substrate 16, the shaft 10 is engaged with the wide portions 11a and 11a ', so that the shaft 10 and the cam groove 11 can slide. A similar shape is provided at the tip of the lever 5 on the other side.

As shown in FIGS. 1 to 3, 6 and 7, the lock lever 14 is provided with a restricting portion 14b for restricting the movement of the lock lever 14 in the direction of arrow a. When the holder 2 is lifted, the lever 6 is held by the restricting portion 14b, and the movement of the lock lever 14 is relatively restricted.

Further, as shown in FIGS.
The bottom plate has an emboss 19 toward the movable substrate 16.
Are formed. The emboss 19 is formed on the same axis as the rotation center 21 a provided on the movable substrate 16 of the arm 21 on which the tape guide post 20 is mounted.
With the emboss 19, the vertical deviation of the tape guide post 20 can be regulated. Since the emboss 19 is aligned with the rotation center 21a, the arm 2
No useless moment is applied to 1.

Next, as shown in FIG.
6 is provided with a reel base 22 on which the cassette 1 is mounted, and the movable substrate 16 is slidably disposed in a front-rear direction on a fixed substrate 40 as a first chassis. On the fixed substrate 40, a rotary drum device 41 is arranged at an angle.

In the above configuration, 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 axis 10 of the movable substrate 16 and the axis 9 of the holder 2 respectively. While moving, the holder 2 is lowered.

With the lowering of the holder 2, the lock lever 14
The locked portion 14a of the movable substrate 16 contacts the lock member 17 of the movable substrate 16, the lock lever 14 is rotated counterclockwise, and the spring 13 is charged. After the corner of the lock member 17 is released, the charge is released, the lock lever 14 is rotated clockwise, and the locked portion 14 a is engaged with the lock member 17. At the same time, the locked portion 14
a presses the lock detection switch 18.

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

Next, the lock detection switch 18 is turned on.
As a result, as shown in FIGS. 3 and 4, the movable substrate 16 is slid relative to the fixed substrate 40 in the direction of the rotary drum device 41, 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 inside of the cassette 1 by the tape guide post 23 or 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 reproduction on the tape 24 is performed by a rotary head or the like.

Next, when an eject command is issued, FIG.
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 FIGS.
The levers 5 and 6 are operated in the reverse of the above-described manner, the holder 2 is raised, and the cassette 1 can be taken out of the holder 2.

In the apparatus constructed and operated as described above, the lock lever 1 is moved up with the holder raised as shown in FIG.
The fourth restricting portion 14b holds the lever 6, and the lock lever 14 has only a play within a certain range.
Therefore, even during the lowering operation of the holder 2, the lock lever 14 does not interfere with the movable substrate 16 or is caught between the lever 6 and the side plate of the movable substrate 16, and the operation of the lock lever 14 is not performed. It will not be stable.

Further, as shown in FIG.
The engagement between the shaft 4 and the shaft 15 is limited to the thickness of the lock lever 14, and even if a lateral pressure in the direction of arrow a is applied to the lock lever 14, the degree of freedom of the lock lever 14 is large. Does not become unstable. Also, the shaft 15
Since no other component such as a bush is used for the fitting portion, the cost can be reduced by reducing the number of components.

Although the 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 lock lever is provided with the restriction portion for restricting the play, the restriction portion may be provided on the lever side to restrict the movement of the lock lever. Further, in the VTR of the embodiment, the configuration provided with the movable chassis is shown, but a general recording or reproducing apparatus having only a fixed chassis may be used.

[0032]

As described above, according to the cassette mounting apparatus of the present invention, the provision of the regulating portion for regulating the play of the lock lever provided on the cassette holder is provided.
It is possible to stabilize the operation of the lock lever at the time of the descending operation of the cassette holder, reduce the size and weight of the apparatus, and reduce the cost by reducing the number of parts. Further, by engaging the link with the restricting portion of the lock lever, the floating movement of the lock lever can be restricted with a very simple structure. Further, by using such a cassette mounting device, it is possible to stabilize the cassette mounting operation and reduce the size and weight of the recording or reproducing device such as a VTR.

[Brief description of the drawings]

FIG. 1 is a side view of a VTR provided with a cassette mounting device according to an embodiment of the present invention at a holder elevated position.

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

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

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

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

FIG. 6 is a perspective view showing a restriction portion of a lock lever and a lever of a link in the embodiment.

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

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

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

FIG. 10 is an enlarged sectional view of a shaft portion of a lock lever of the cassette mounting device.

[Explanation of symbols]

 Reference Signs List 1 cassette 2 cassette holder 5, 6 lever 13 ascending biasing spring 14 lock lever 14b regulating portion 15 shaft 16 movable substrate (second chassis) 17 lock member 22 reel base 24 tape 40 fixed substrate (second chassis) 41 Rotary drum device

Claims (4)

(57) [Claims] A cassette holder 1. A cassette is inserted, and a link mechanism for vertically movably supported between a lowered position and a raised position the cassette holder relative to the chassis, provided on the side plate of the cassette holder, the In the lowered position
In cassette loading apparatus comprising a lock lever which is locked to the chassis have a vertical movement with respect to the side plate of the lock lever in at least the raised position of the cassette holder, the Rokkure
Engage the bar and the lever that constitutes the link mechanism
Cassette loading apparatus characterized by comprising a regulating portion for regulating by. 2. The device according to claim 1, wherein the restricting portion is provided on the lock lever.
2. The cassette mounting device according to claim 1, wherein a lever constituting the link mechanism is engaged with the restricting portion. 3. A cassette mounting device according to claim 1, further comprising: a rotating drum device; and a chassis having at least the rotating drum device, the cassette mounting device, and a reel base, wherein a tape cassette is inserted. The cassette holder is lowered from the raised position to the lowered position by the cassette mounting device, and the tape cassette is mounted on the reel base of the chassis. Then, the tape is pulled out from the tape cassette and wound around the drum peripheral surface. A recording or reproducing apparatus characterized in that: 4. The cassette mounting device according to claim 1, further comprising 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 base. 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, and the second After the tape cassette is mounted on a reel base of a 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 rotated. 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.