JPH0627006Y2 - Recording / playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a recording / reproducing apparatus most suitable for application to, for example, a VTR, and more particularly to a recording / reproducing apparatus using a return guide that also serves as a loading guide. It is a thing.

[Outline of device]

This invention is a recording / reproducing apparatus in which a tape in a tape cassette is pulled out by a return guide which is also reciprocally moved by a slider and wound around the outer peripheral surface of a rotary head, and a slider is used. By moving the impedance roller together with the return guide and bringing the impedance roller into contact with the tape between the return guide and the rotating head drum, the impedance of the vibration of the return guide is transmitted to the rotating head drum side of the tape. It can be removed by a roller, and the impedance roller does not interfere with the loading and unloading of the tape.

[Conventional technology]

FIG. 4 shows an example of a conventional VTR, in which a return guide 22 composed of a rotating roller also serving as a loading guide is provided along a slider guide 30 by a slider 21 in the directions of arrows a and a '. It is configured to reciprocate. Then, the magnetic tape 2 in the tape cassette (not shown) is pulled out by the return guide 22 and loaded so as to be wound around the outer peripheral surface 9a of the rotary head drum 9 in a spiral shape. Simultaneously with the completion of the loading, the slider 21 is positioned by the positioning means 36, and the direction of the magnetic tape 2 supplied to the rotary head drum 9 from the direction of the arrow e when the magnetic tape 2 is running at the time of recording, reproducing, etc. The return guide 22 is turned over to approximately 180 °.

[Problems to be solved by the invention]

However, since the wrapping angle of the magnetic tape 2 on the peripheral surface of the return guide 22 is very large (approximately 180 °), the magnetic tape 2 is damaged by the vibration of the return guide 1, particularly in the direction of arrow i in FIG. Recording a large amount of jitter on the magnetic tape 2 by the rotating head drum 9,
It was easy to significantly deteriorate the reproduction accuracy.

This invention has been made in order to solve the above-mentioned problems, and it is possible to eliminate the transmission of the vibration of the return guide to the rotating head drum side of the tape by the impedance roller, and further, the impedance roller. The present invention provides a recording / reproducing apparatus which does not interfere with the loading and unloading of tapes.

[Means for solving problems]

A recording / reproducing apparatus according to the present invention is provided with a slider that is reciprocated between a backward movement position in a tape cassette and a forward movement position close to a side portion of a rotary head drum, and the slider is provided on the slider. By pulling out the tape in the tape cassette by being moved forward from the backward movement position to the forward movement position, a return guide also serving as a loading guide for loading to be wound around the outer peripheral surface of the rotating head drum, Provided on the slider,
An impedance roller is provided between the return guide and the rotary head drum to contact the tape when the slider is moved from the backward movement position to the forward movement position.

[Action]

According to the recording / reproducing apparatus of the present invention, the impedance roller is brought into contact with the tape between the return guide and the rotary head drum, so that the impedance roller removes the vibration of the return guide transmitted to the rotary head drum side of the tape. be able to. Moreover, since the impedance roller is provided on the slider and is moved together with the return guide by the slider, the impedance roller does not interfere with the loading and unloading of the tape. .

〔Example〕

An embodiment in which the present invention is applied to a VTR will be described below with reference to FIGS. 1A to 3.

First, the outline of the tape loading device will be described with reference to FIG.

When the tape cassette 1 is mounted, the supply reel 3 and the take-up reel 4 having the magnetic tape 2 wound therein are engaged with the supply reel base 5 and the take-up reel base 6.
After mounting the tape cassette 1, the feeding side loading guide block 7 and the winding side loading guide block 8 are moved forward from the backward movement position in the tape cassette 1 to the side portion of the rotary head drum 9. Up to the left and right sides of the rotary head drum 9 in the directions of arrows a and b. At the same time, the auxiliary loading means such as the tension regulator 10, the auxiliary loading guide 11 and the pinch roller 12 are moved from the backward movement position in the tape cassette 1 to the left and right lateral side forward movement positions of the rotary head drum 9. Is moved in the directions of arrows c and d.

As a result, the magnetic tape 2 in the tape cassette 1 is pulled out of the tape cassette 1, and the magnetic tape 2 is wound around the outer peripheral surface 9a of the rotary head drum 9 in a spiral shape and in a substantially Ω shape. The supply side of the impedance roller 13, full width erasing head 14 and CTL head 15
And the winding side of the magnetic tape 2 is loaded onto the impedance roller 16, the audio head 17, the configuration head 18, the capstan 19, and the like.

After the loading of the magnetic tape 2 is completed, the magnetic tape 2 is moved to the capstan 1 by the pinch roller 12.
The winding reel 4 drives the take-up reel base 6 to press the magnetic tape 2, and the magnetic tape 2 travels in the direction of arrow e on the loading path so that the magnetic tape 2 is wound from the supply reel 3 to the take-up reel 4. A video signal is recorded on or reproduced from the magnetic tape 2 by a plurality of video heads (not shown) of the rotary head drum 9 which is driven and rotated in the direction of arrow f.

Next, the details of the loading side loading guide block 7 will be described with reference to FIGS. 1A and 2.

First, as shown in FIG. 2, the loading side loading guide block 7 has a slider 21 on which a return guide 22 composed of a rotating roller and also serving as a loading guide is provided.
An impedance roller 23 and a tape guide 24 composed of a rotating roller are attached. The return guide 22 is moved in the forward direction of the slider 21 (arrow a).
(Direction) side rotatably mounted directly on the end of the slider 21 in the return direction (arrow a'direction) side, and a pivot arm 26 rotatably mounted via a fulcrum shaft 25.
Above, the impedance roller 23 and the tape guide 24 are rotatably attached to both sides of the fulcrum shaft 25. The rotating arm 26 is substantially L-shaped, and a guide roller 27 is rotatably attached to an end of the rotating arm 26 on the return guide 22 side. The rotating arm 26 is urged to rotate in the direction of arrow g in FIG. 1C by a torsion coil spring 28 wound around the outer periphery of the fulcrum shaft 25, and abuts against a stopper 29 on the slider 21. ing. A large-diameter flange 23a is integrally provided on the upper end of the impedance roller 23.

And the slider 21 is on the slider guide 30,
It is configured to be guided by a guide groove 31 provided along the center of the slider guide 30 and reciprocate in the directions of arrows a and a'between the return position and the forward position. . A head mount 3 is provided with the CTL head 15 mounted on the upper side of the forward movement position of the slider 21.
2 is provided, and a roller guide surface 33 for guiding the guide roller 27 is provided on the side surface of the head mount 32. Further, a positioning means 36 having a V groove 35 for positioning the positioning pin 34 provided on the end portion on the forward direction side on the slider 21 is provided on the slider guide 30 in front of the forward movement position of the slider 21. ing.

Next, the operation of the supply side loading guide block 7 configured as described above will be described with reference to FIGS. 1A to 1C.

First, FIG. 1C shows a state in which the supply side loading guide block 7 is reciprocated in the directions of arrows a and a'between the return position and the forward position. At this time, the return guide 22, the impedance roller 23, and the tape guide 24 are arranged in a line on the slider 21, and the slider 21 reciprocates along the slider guide 30 in the directions of arrows a and a '. To be done. Therefore, at this time, the slider 21 is rotated by the rotary head drum 9
Even if the impedance roller 23 is moved close to the outer peripheral surface 9a, the impedance roller 23 is moved while being kept sufficiently separated from the outer peripheral surface 9a. In particular, the flange 23a at the upper end of the impedance roller 23 is Its outer peripheral surface 9
There is no danger of being interfered by a.

Next, FIG. 1B shows the forward movement of the supply side loading guide block 7, and the slider guide 3
The guide roller 27 contacts the roller guide surface 33 of the head mount 32 when the slider 21 which is moved forward in the direction of the arrow a along the position 0 reaches near the forward movement position.

Then, as shown in FIG. 1A, while the guide roller 27 is guided by the roller guide surface 33, the slider 21 is moved forward and stopped in the direction of arrow a to the forward movement position, and the positioning pin 34 is moved to the V groove of the positioning means 36. 35, the slider 21 is positioned at its forward movement position. Then, the magnetic tape 2 is wound around the outer peripheral surface 9 a of the rotary head drum 9 by the forwardly returned return guide 22.

Then, as shown in FIG. 1A, when the slider 21 reaches the forward movement position, the rotating arm 26 on the slider 21 moves about the fulcrum shaft 25 by the guiding action of the guide roller 27 by the roller guide surface 33. Is rotated in the direction of the arrow g ′ against the torsion coil spring 28, and the impedance roller 1
6 on the outer peripheral surface 9a of the rotary head drum 9 is, for example, 0.2 to
This impedance roller 2 is brought close to 0.4mm.
3 is brought into contact with the magnetic tape 2 between the return guide 21 and the rotary head drum 9. It should be noted that the slider 21 is configured to be raised with respect to the rotary head drum 9 as it is moved from the backward movement position to the forward movement position, and when the slider 21 reaches the forward movement position, the impedance roller 23 The flange 23a at the upper end is moved upward from the upper end of the rotary head drum 9, and the flange 23a is moved to the first position.
By overlapping the rotary head drum 9 as shown in FIG. A, the impedance roller 23 is brought close to the outer peripheral surface 9 a of the rotary head drum 9 without the flange 23 a of the rotary head drum 9 interfering with the rotary head drum 9.

On the other hand, by the rotation of the rotation arm 26 in the direction of the arrow g ′, the tape guide 24 is brought close to the lateral side portion of the CTL head 15, and the magnetic tape 2 between the return guide 22 and the tape guide 24 is separated. The CTL head 15 is contacted.

Then, when the magnetic tape 4 shown in FIG. 1A is running after recording and reproducing after the loading of the magnetic tape 2, the direction of the magnetic tape 2 supplied from the direction of arrow e to the rotary head drum 9 is changed to the return guide 22. Is almost 180 °
Flip to.

Then, the impedance roller 23 in contact with the magnetic tape 2 is rotated at high speed in the direction of arrow h following the magnetic tape 2 running in the direction of arrow e. As a result, the impedance (23) between the return guide 22 and the rotary head drum 9 removes the vibration (jitter property) given to the magnetic tape 2 by the vibration of the return guide 23, for example, in the direction of arrow i. The vibration of the guide 22 is not transmitted to the rotating head drum 9 side of the magnetic tape 2. As a result, the magnetic tape 2 runs extremely stably on the outer peripheral surface 9a of the rotary head drum 9, and the magnetic tape 2
The accuracy of recording and reproducing is significantly improved.

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments and various effective modifications can be made based on the technical idea of the present invention.

[Effect of device]

As described above, in the recording / reproducing apparatus of the present invention, the impedance roller causes the vibration of the return guide to be transmitted to the rotating head drum side of the tape by bringing the impedance roller into contact with the tape between the return guide and the rotating head drum. So that it can be removed,
The recording and reproducing accuracy of the tape can be significantly improved. Moreover, since the impedance roller is moved together with the return guide by the slider so that the impedance roller does not interfere with the loading and unloading of the tape, the loading and unloading of the tape can be done smoothly and smoothly. In addition to the above, the size of the recording / reproducing apparatus can be reduced. That is, the impedance roller
It is also possible to fix and provide the position between the return guide moved forward to the forward movement position close to the side portion of the rotary head drum and the rotary head drum, but in that case,
Since the impedance roller interferes with the loading and unloading of the tape, the slider and the return guide must be moved along a path sufficiently separated from the rotating head drum so as not to interfere with the impedance roller. According to this invention, such an inconvenience can be eliminated although the reproducing apparatus becomes large in size.

[Brief description of drawings]

FIGS. 1A to 3 show an embodiment of the present invention. FIGS. 1A to 1C are plan views for explaining the operation of the main part, and FIG. 2 is a perspective view of the main part. FIG. 3 is a plan view showing the outline of the tape loading device. FIG. 4 is a plan view of a conventional example. In the drawings, reference numerals 1 ... Tape cassette 2 ... Magnetic tape 9 ... Rotating head drum 9a ... Outer circumferential surface of rotating head drum 21 ... Slider 22 ... Return guide 23 ... Impedance roller .

Claims (1)

[Scope of utility model registration request] 1. A slider reciprocating between a backward movement position in a tape cassette and a forward movement position close to a side portion of a rotary head drum; and a slider provided on the slider, wherein the slider is the backward movement position. From the tape to the forward position to pull out the tape in the tape cassette, and to load the tape so as to wind it around the outer peripheral surface of the rotary head drum. A recording / reproducing apparatus provided with an impedance roller provided between the return guide and the rotating head drum when the slider is moved from the backward movement position to the forward movement position.