JPH035002Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field This invention is a videotape recorder (hereinafter referred to as
This invention relates to a reel idler moving device for a VTR (referred to as a VTR).

BACKGROUND ART There is a type of VTR in which the tape is pulled out from the cassette and wrapped around the circumference of a rotating drum by rotating a loading ring. In this VTR, after the recording, recording, or playback operation is completed, the tape wound around the circumferential surface of the rotating drum is unloaded by the rotation of the loading ring and stored in the cassette. That is, when unloading the tape, the reel idler moves to the position of the take-up reel stand and comes into sliding contact with its circumferential surface, thereby transmitting the rotational power of the reel motor to the take-up reel stand and causing it to rotate. Then, the tape unloaded by the loading ring is sequentially wound and stored on the take-up reel of the cassette by the rotation of the take-up reel stand. After that, the cassette is ejected and the VTR is
taken from. In this state, the reel idler is held in a position where it remains in contact with the circumferential surface of the take-up reel stand. On the other hand, when the tape is wound around the circumferential surface of the rotating drum and loaded, the tape is pulled out from the take-up reel side of the cassette placed on the take-up reel stand. Therefore, when you load the cassette onto the reel stand again and try to pull out the tape from the cassette using the loading ring, the reel idler remains in contact with the take-up reel stand, causing the take-up reel stand to rotate. As a result, a phenomenon occurs in which the reel idler bites into the peripheral surface of the reel. As a result, a braking force is applied to the take-up reel stand in the opposite direction to the tape pull-out direction, which impedes the tape loading operation by the loading ring. Therefore, it is necessary to take some measure to move the reel idler away from the circumferential surface of the take-up reel stand during tape loading.

DISCLOSURE OF THE INVENTION The object of this invention is to enable the reel idler to reliably and easily move away from the take-up reel stand in conjunction with the cassette loading/unloading operation, thereby allowing the tape loading operation to be performed smoothly.

This purpose is to provide a magnetic piece or magnet at one end of the idler arm, provide a lever means near the magnetic piece or magnet that rotates along the moving direction of the idler arm in conjunction with the cassette loading/unloading operation, and also provide one end of the lever means. A magnet or a magnetic piece that faces the magnetic piece or magnet and attracts each other is attached to the part, and when the lever means rotates in a predetermined direction, the reel idler supported at one end of the idler arm engages the magnet or magnetic piece. This can be achieved by configuring it to move in a direction away from the take-up reel table via the idler arm due to the attraction effect with a magnetic piece or magnet.

According to this invention, the lever means is rotated in a predetermined direction in conjunction with the cassette loading/unloading operation, and the attraction force between the magnet or magnetic piece provided on the lever means and the magnetic piece or magnet provided on the idler arm is used. The idler arm is thus biased to move the reel idler away from the take-up reel stand. Therefore, the reel idler can be reliably and easily moved away from the take-up reel stand prior to tape loading. Therefore, during tape loading, the take-up reel stand can be completely rotated freely, and there is no phenomenon of the reel idler biting into the take-up reel stand, allowing smooth tape loading operation. be able to.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, one embodiment of the invention will be described in detail with reference to the drawings.

Figures 1 and 2 are VTRs to which this invention is applied.
1, a supply reel stand 11 and a take-up reel stand 12 are arranged as a pair at a predetermined position on a chassis base 10 at a predetermined interval. A loading ring 13 for loading and unloading the tape is located behind the reel stands 11 and 12.
is rotatably provided. The loading ring 13 is rotationally driven in a predetermined direction by a loading ring motor (not shown). A cassette containing tape is loaded onto the reel stands 11 and 12 via a cassette house.

A reel drive mechanism is arranged between the reel stands 11 and 12. The reel drive mechanism includes a mounting base 20 fixed to a predetermined position of the chassis base 10 by screws or the like, a reel motor 21 provided on the lower surface of the mounting base 20, and a mounting base 20 for the reel motor 21.
A drive wheel 23 fitted on a drive shaft 22 protruding upward from the drive shaft 22 whose approximately middle portion is below the drive wheel.
An idler arm 24 is mounted on the mounting base 20 and is supported on the mounting base 20 so as to be movable between the supply reel base 11 and the take-up reel base 12 by the rotational force of the reel motor 21. It is slidably mounted in the longitudinal direction and has an idler shaft 26 at one end.
The support plate 25 on which is erected, and the idler shaft 2
The reel idler 27 is rotatably supported at the end of the reel idler 27.

The reel idler 27 is in slidable contact with the drive wheel 23 by the bias of a spring 28 interposed between the idler arm 24 and the support plate 25.
The reel idler 27 is movable between the supply reel stand 11 and the take-up reel stand 12 as the idler arm 24 rotates.

The end of the mounting base 20 is bent upward into an inverted L shape,
A guide member 29 that slides into contact with the reel idler 27 is provided on the front surface of the bent portion 200. The guide member 29 is made of, for example, moltoplane having a large coefficient of friction.

When the drive wheel 23 is rotationally driven by the drive of the reel motor 21, the reel idler 27 is rotationally driven in a predetermined direction while being in sliding contact with the drive wheel 23, and the reel idler 27 is rotated in a predetermined direction while being in sliding contact with the drive wheel 23. Due to the frictional effect of sliding contact, it is guided to either side of the supply reel stand 11 or the take-up reel stand 12, and is rotated by slidingly contacting the peripheral surface thereof.

An iron piece 30 is attached to the end of the idler arm 24 opposite to the reel idler 27.

On the other hand, a means for moving the reel idler 27 is provided on the chassis base 10 in front of the mounting base 20, and when a cassette is loaded onto the reel bases 11 and 12, the reel idler 27 is wound in conjunction with this loading operation. It is adapted to be moved away from the reel stand 12. This transportation means is constructed as follows.

A support leg 31 is provided on the chassis base 10 near the front of the mounting base 20, and a first
The middle of the lever body 32 is pivotally connected. An idler arm 24 is attached to one end of the first lever body 32.
A magnet 33 is attached to face the iron piece 30 provided at a predetermined distance from the iron piece 30, so that the iron piece 30 and the magnet 33 are attracted to each other. First lever body 32
One end of a connecting rod 34 is connected to the other end by a pin 35. The other end of the connecting rod 34 extends along the base surface in the opposite direction to the first lever body 32, and one end of the second lever body 37, which is pivotally connected to the support leg 36, is attached to the pin 38. connected by. The second lever body 37 is formed into a substantially L-shape with a rising portion at one end of a flat base, and is pivoted by the support legs 36, and the other end is connected to the first lever along the base surface. It extends in the opposite direction to the body 32. On the other hand, a support stand 39 is provided near the extended end of the second lever body 37 on the chassis base 10, and the operation shaft 40 is vertically supported by support pieces 391, 392 provided at intervals above and below this support stand 39. It is slidably inserted and supported. A flange 41 is provided on the outer periphery of the operating shaft 40, and is adapted to prevent the operating shaft 40 from coming off upward and to regulate its position by coming into contact with the support piece 391. A coil spring 42 is interposed between a flange 41 on the outer periphery of the operating shaft 40 and a support piece 292, and constantly biases the operating shaft 40 in the upward movement direction from the state in which it is pushed in in a cassette house, which will be described later. When a cassette house containing a cassette is loaded onto the reel stands 11, 12 along a predetermined path, the operating shaft 40 is pushed downward while opposingly abutting one side of the reel base 11, 12, and the operating shaft 40 is pushed downward to the extended end of the second lever body 37. The portion 371 is pushed down and rotated about the point pivoted by the support leg 36 as a fulcrum.
As a result, the first lever body 32 is rotated via the connecting rod 34 in a direction in which the reel idler 27 is removed from the take-up reel stand 12.

The second lever body 37 is constantly biased by a spring 43 mounted on the chassis base 10 in a direction opposite to the above-mentioned push-down direction.

Next, the operation of the present device having the above configuration will be explained.

In the ejected state of the cassette shown in FIGS. 1 and 2, the reel idler 27 is held at a position in contact with the take-up reel stand 12. In this state, during cassette loading, when the cassette A stored in the cassette house B descends to the vicinity of the reel stands 11 and 12 along a predetermined loading path, the operating shaft 40 comes into contact with the lower surface of the cassette A, and then the third
As shown in the figure, the operating shaft 40 is pushed downward against the spring 42. Then, the second lever body 37
The extended end 371 of is pushed down and rotated about the fulcrum in the direction of arrow 101 in FIG. 3. When the second lever body 37 rotates, the first lever body 32 rotates by a required angle in the direction indicated by the arrow 102 around the point supported by the support leg 31 via the connecting rod 34. This rotation causes the magnet 33 to move from the supply reel stand 11 toward the take-up reel stand 12 to an intermediate position while attracting the iron piece 30 attached to the idler arm 24. Then, the idler arm 24 causes the magnet 33 to act on the iron piece 30.
It is urged by the magnetic force of and rotates around the drive shaft 22 in the direction of movement. This allows reel idler 2
7 is detached from the take-up reel stand 12 as shown by arrow 103 in FIG. This allows the take-up reel stand 12 to freely rotate.

In this manner, the reel idler 27 is moved away from the take-up reel stand 12 in conjunction with the cassette loading operation.

Thereafter, the tape is pulled out from the take-up reel side of the cassette A by the operation of the loading ring 13 and loaded along a predetermined path. At this time, since the reel idler 27 is moved from the take-up reel stand 12 and the contact is released, there is no biting phenomenon caused by contact between the two, and smooth tape loading can be performed.

On the other hand, when the recording, recording or playback operation is finished,
The reel idler 27 is driven by the reel motor 21 and moves to the position of the take-up reel stand 12 while slidingly contacting the guide member 29, and comes into sliding contact with the circumferential surface thereof. At this time, the attraction force against the iron piece 30 due to the magnetic force of the magnet 33 is set to be smaller than the driving force of the reel motor 21 so as not to interfere with the movement of the reel idler 27.

Thereafter, the tape unloaded by the loading ring 13 is wound and stored on the take-up reel side of the cassette A by the rotation of the take-up reel stand 12 driven by the reel motor 21. Next, when the cassette A is ejected from the reel stands 11 and 12 by the movement of the cassette house B, the pushing into the operating shaft 40 is released, and this operating shaft 40
is returned upwardly to its original position shown in FIG. 1 by the bias of spring 42. As a result, the second lever body 3
7 is released, the second lever body 37 is rotated back in the direction opposite to the arrow 101 by the urging force of the spring 43, and the first lever body 32 is moved to the third lever body 32 via the connecting rod 34. It rotates back from the solid line position shown in FIGS. 4 and 4 to the original position shown in FIG. As a result, the magnet 33 provided on the first lever body 32 is again opposed to the iron piece 30 provided on the idler arm 24, as shown in FIG. 1, in preparation for the next cassette loading operation.

Incidentally, contrary to the embodiment, the iron piece 30 may be provided on the first lever body 32 and the magnet 33 may be provided on the idler arm 24. Also, iron piece 30
Other magnetic pieces may be used instead.

Furthermore, in the embodiment, it has been explained that the reel idler 27 moves away from the take-up reel stand 12 in conjunction with the cassette loading operation, but by slightly modifying the above-mentioned configuration, it can be moved in conjunction with the cassette ejection operation. It is also possible to configure the reel idler 27 to be moved away. However, in terms of the operation mode of the VTR, it would be more desirable in practice to adopt the configuration shown in the embodiment.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the main parts of a VTR to which this invention is applied, Fig. 2 is a front view thereof, Fig. 3 is a front view illustrating the operation of the proposed device, and Fig. 4 is a perspective view similarly illustrating the operation. It is. 24... Idler arm, 30... Iron piece (magnetic piece), A... Cassette, {32... First lever body, 34... Connection rod, 37... Second lever body,
40... Operating shaft, 41, 43... Spring} lever means, 33... Magnet, 27... Reel idler.

Claims (1)

[Scope of utility model registration request] An idler arm is pivotally connected to be movable between a supply reel stand and a take-up reel stand by the rotational force of the reel motor, and an idler arm is attached to one end of the idler arm so as to be rotated in a predetermined direction by the drive of the reel motor. In the video tape recorder, a magnetic piece or magnet is provided at one end of the idler arm, and a lever that rotates along the moving direction in conjunction with the cassette loading/unloading operation is provided near the magnetic piece or magnet. A magnet or a magnetic piece is attached to a part of the lever means to face the magnetic piece or the magnet and attract each other, and when the lever means rotates in a predetermined direction, the reel idler An idler moving device, characterized in that the idler is moved in a direction away from the take-up reel table via the idler arm due to an attraction between a magnetic piece and the magnetic piece or magnet.