JPH0320111B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention utilizes a helical scan rotating head system.
This invention relates to a noiseless high-speed playback device for VTRs.

In general, the traces on a tape recorded with a VHS VTR look like the one shown in Figure 1. In FIG. 1, reference numeral 1 denotes a magnetic tape, on which recording traces A1, B1, A2, B2, A3, . . . are formed by two rotating heads having mutually different azimuths. The recording traces A1, A2, . . . are caused by one rotating head A, and the recording traces B1, B2,
... is caused by the other rotating head B. Arrow X indicates the running direction of the tape during recording, and arrow Y indicates the scanning direction by rotary heads A and B.

During normal playback, the tape 1 is run in the direction of arrow X at the same speed as during recording, and the rotating heads A and B are also run at the same speed as during recording, and the recording traces A1, A2, . . . are rotated. In head A, recording traces B1, B2, . . . were scanned by rotary head B, and recorded signals were reproduced by rotary heads A and B.

By the way, in the case of so-called cueing, in which the tape is run at high speed to obtain a reproduced image in order to search for specific screen information recorded on the tape, if the tape is run at, for example, 9 times the speed, the rotating heads A,
Scanning traces by B are now shown by dashed lines a and b, respectively. For example, rotating head A has recording traces A6 and B.
6, A7, B7, A8, B8, A9, B9, A1
Scan 0 sequentially. By this scanning, the rotating head A
When only the recording traces B6, B7, B8, and B9 hit the recording heads, the azimuth of the recording heads is different, so no reproduced signal is obtained, only noise is obtained, and the reproduced signal shown in Fig. 2 is obtained from the rotating head A. . In FIG. 2, symbols a6, a7, a8, a9, and a10 represent the above-mentioned recording traces A6, A7, A8, A9, and A, respectively.
It is from 10.

When the tape is run at high speed as described above, the directions of the recording traces A1, B1, . . . on the tape and the scanning traces a and b by the rotating heads A and B are different.
The screen is divided on one screen, making it difficult to see the playback screen.
Another drawback is that there is a lot of noise in the portion where the reproduction output is small.

Remove the above defects and record traces A1, B1,...
In order to match the directions of the scanning traces a and b, it is conceivable to change the running direction of the tape with respect to the rotation direction of the rotary heads A and B, as shown in FIG. In FIG. 3, reference numeral 1 denotes the above-mentioned tape, which is wrapped around the circumferential surface of a well-known head drum 2 having rotating heads A and B over an angle of about 180 degrees. The rotary heads A and B are attached to the upper side 3 of the head drum 2 and rotate together with the rotary heads, while the lower side 4 is fixed to a substrate or the like. Reference numeral 5 denotes a lead guide fixed to the lower side of the head drum 2, and during normal playback, the tape 1 runs in the direction of arrow X with one edge of the tape 1 being lightly pressed against the lead guide 5.

Reference numerals 6 and 7 denote tape guides, which are fixed to the substrate at the entrance and exit sides of the tape 1 in the head drum 2. These tape guides 6 and 7 are formed in a cylindrical shape and have flanges 6a, 6b, 7a, and 7b that restrict movement of the tape 1 in the width direction. pressed against. This tape guide 6
When one edge of the tape 1 moves slightly apart as shown in FIG. 3 (as if pressing one edge of the tape 1 with the flange 6b), the running direction of the tape 1 changes as described above.

As explained with reference to FIG. 3 above, the recording traces A1 and B1 on the tape 1 can be made to coincide with the scanning traces a and b. FIG. 4 shows a state in which the recording trace A1 of the rotary head A coincides with the scanning trace a during high-speed running. At this time, if the running direction of the tape 1 is not changed, the scanning trace a will be a chain line a'
become that way.

As shown in FIG. 4 above, when the scanning trace a becomes shorter than the recording trace A1, a part of the reproduced screen is missing. Further, it is necessary to control the speed of the rotary head A so that the short scanning trace a is scanned in the same time as it takes to travel the recording trace A1 during normal reproduction.

Although the above description relates to the rotary head A, substantially the same applies to the rotary head B.

Furthermore, in the above explanation, the case where the playback screen is obtained by running the tape 1 at high speed in the direction of the arrow X, but when the tape 1 is running at high speed in the Z direction opposite to the arrow As shown in FIG. 5, the recording traces A1 and B on the tape 1 are
The scanning traces of the rotary heads A and B relative to 1, ... are tilted as shown by the chain lines, and the screen is divided in almost the same way as when the tape is run at high speed in the direction of arrow X, resulting in a noisy screen. . This record A
1, B1, ... to the above scanning trace, the sixth
As shown in the figure, the tape guide 7 explained in FIG. . In addition, in Figure 6,
The same reference numerals as in FIG. 3 indicate members having the same effect.

By the way, as mentioned above, by moving the tape guides 6 and 7 in the axial direction as shown in FIG. 3 or 6, and separating one edge of the tape 1 from the lead guide 5, the recording traces A1, B1, If an attempt is made to match the direction of the scanning traces of the rotating heads A and B, the following drawbacks will occur.

(1) Assuming that the tape 1 does not bend in the tape width direction (is a rigid body), the tape 1 will completely separate from the lead guide 5, or even if it touches the lead guide 5, the flange will not bend at this time. Part 7
a and 6b become separated from the other edge of the tape 1, and the movement of the tape 1 in the width direction cannot be restricted, making the running of the tape 1 unstable. This instability also occurs in the actual tape 1.

(2) In the actual tape 1, the lead guide 5 is
It causes droop in the direction approaching (loses linearity),
The part of the tape close to the lead guide 5 touches the lead guide. Due to this sagging of the tape 1, the recording traces A1, B1,...
... is also slightly bent, and there are areas that do not match the scanning traces of rotating heads A and B, and the S/N of the reproduced signal
becomes worse.

The present inventor has previously proposed a high-speed playback device for a VTR that eliminates the above-mentioned drawbacks and reduces the above-mentioned unstable tape running and tape droop.
That is, this high-speed playback device is a VTR that has a head drum equipped with a rotating head and a lead guide that can be brought into contact with one edge of the tape on the circumferential surface of the head drum. Separate guides are provided to limit the position of the tape in the width direction, and one edge of the tape is guided by one of the guides during high-speed tape playback. separating one edge from the lead guide so that the rotary head scans the tape along the recording trace on the tape, and guiding the other edge of the tape by the remaining guide, This is characterized in that one edge of the tape is pushed further than the position where it touches the lead guide.

The object of the present invention is to further improve the previously proposed invention, to provide a high-speed playback device for a VTR that can further stabilize the running properties of a magnetic tape and provide high-quality images.

Next, embodiments of the present invention will be described with reference to FIGS. 7 to 17.

FIG. 7 is a schematic configuration diagram showing only the parts related to the present invention in a VTR. In the figure, reference numeral 2 denotes the head drum described above, which is attached to a substrate (not shown) as is well known. Reference numeral 1 designates the above-mentioned magnetic tape, which is housed in a well-known cassette 8, and has inclined guide poles 9,
10 and vertical guide poles 11 and 12 are pulled out from the cassette 8 as they move, and are wrapped around the circumferential surface of the head drum 2 as shown in the figure. At the tape drawing position, the vertical guide poles 11 and 12 abut against stoppers 13 and 14 having V grooves and are held at that position. 15 and 16 are impedance rollers, 17 is a full width erase head, and 18
1 is a side erase head, 19 is a CTL-audio head, 20 is a capstan, 21 is a pinch roller, 22 is a tension pin, and 23 is a tape guide, which are well known.

A Q-tape guide 24 is implanted at the tip of a Q-tape guide arm 25, and the arm 25 is rotatably supported by a support shaft 26. On the other hand, reference numeral 27 denotes a review tape guide, which is implanted at the tip of a review tape guide arm 28, and the arm 28 is rotatably supported by a support shaft 29. Below the Q-tape guide arm 25, a reviuse slant pole arm 30 is similarly rotatably supported by a support shaft 26, and a reviuse slant pole 31 is implanted at the tip of the arm 30. . It should be noted that the Q-tape guide arm 25 and the revieux slant pole arm 30 can be rotated individually. A key slant pole arm 32 is similarly rotatably supported by a spindle 27 below the review tape guide arm 28, and a key slant pole 33 is implanted at the tip of the arm 32. There is. Note that the review tape guide arm 28 and the key slant pole arm 32 can be rotated individually. The reuse slant pole 31 and the reuse slant pole 33 are functionally inclined so as to be slightly tilted toward the tape 1 side. The above-mentioned Q-tape guide 24, Rev-U tape guide 27, Rev-U slant pole 31,
Mechanisms such as the key slant pole 33 will be explained in detail later.

First, using FIG. 8 and FIG. 9, the vertical guide poles 11, 12 and the stoppers 13, 1
The configuration of No. 4 will be explained. Incidentally, since the vertical guide pole 11 and the stopper 13 have the same configuration as the vertical guide pole 12 and the stopper 14, respectively, only one will be explained.

In the figure, numeral 34 is a rod associated with a well-known arm (not shown) that moves the vertical guide pole 12 when the tape 1 is pulled out from the cassette 8, and moves substantially together with the arm. This rod 3
A pole holder 35 is fixed to the pole holder 4, and a slide shaft 36 is slidably inserted through the pole holder 35. The pole holder 35 is provided with a female thread 37, into which a lower flange receiving bolt 39 having a male thread 38 is screwed. The slide shaft 36 is slidably inserted into a center hole 40 (see FIG. 9) of the receiving bolt 39, and a recess 42 (see FIG. 8) into which the lower part of the lower collar 41 is fitted is inserted into the upper part of the center hole 40. 2 is further provided from the recess 42 toward the outer periphery.
A book radial groove 43 (see FIG. 9) is formed. After the receiving bolt 39 is adjusted in position with respect to the pole holder 35 by the screwing amount, it is fixed with a rotation set screw 48.

As shown in FIG. 9, the lower part of the lower flange 41 is provided with a small-diameter cylindrical part 44 and two fitting pieces 45 extending radially from the cylindrical part 44. This cylindrical part 4
4 is inserted into the recess 42 of the receiving bolt 39, and the fitting piece 45 is inserted into and removed from the radial groove 43, respectively. An upper flange 47 is arranged above the lower flange 41 via a guide roller 46.
1 and the upper flange 47 are integrally connected to the slide shaft 36, but the guide roller 46 can freely rotate relative to the slide shaft 36. A fixed collar 49 is attached to the vicinity of the lower end of the slide shaft 36, and a pressing spring 50 is interposed between the fixed collar 49 and the pole holder 35 to constantly urge the slide shaft 36 downward.

The stopper 14 is fixed to a part of the frame by a set screw 51, and a V-groove 52 is formed on the side of the stopper 14 facing the vertical guide pole 12, so that the pole holder 35 is pressed into contact with the stopper 14. There is. An adjustment screw support section 53 is erected from the base side of the stopper 14 in line with the vertical guide pole 12, and an adjustment screw 54 is screwed into the upper part of the support section 53.
is opposed to the upper end of the slide shaft 36, and the adjusting screw 54 is constantly pulled upward by a pressure spring 55. Depending on the screw insertion condition of the adjustment screw 54, the gap between the slide shaft 36 and the adjustment screw 54, that is, the increase in the axial movement of the vertical guide pole 12 Δh
can now be adjusted. The mechanism for moving the vertical guide pole 12 (11) in the axial direction will be explained later.

Figure 10 is an exploded perspective view of the cube block,
Figure 1 is an assembled side view of the block, and this block controls the rotation of the cue tape guide 24 and the cue slant pole 33 during cueing, and the vertical guide pole 1.
Perform the 2nd lift. The queue block mainly includes a slide holder 56, a queue slide 57, a queue plunger 58, and a shift roller arm 59.
and a shift lever 60.

Three screw holes 61 are drilled on the upper surface of the slide holder 56 for screwing to a frame (not shown), and a plunger fixing portion 62 is formed on the left side as viewed in FIG. 63, the QU plunger 58 is attached. Two slide support pins 64 and one shift lever support pin 65 are provided on the side surface of the slide holder 56 and extend horizontally at a predetermined interval.

Two elongated holes 66a and 66b are formed along the longitudinal direction of the cue slide 57, and the slide support pin 6 of the slide holder 56 is inserted into the holes 66a and 66b.
4 is inserted, the cue slide 57
is slidably supported by the slide holder 56, and the slide stroke of the cue slide 57 is regulated by the length of the elongated hole 66.

A plunger connecting portion 68 having a pin insertion hole 67 is provided below the elongated hole 66a, and is connected to an actuator 69 in the Q-plunger 58.
The cue slide 57 is connected to the actuator 69 of the cue plunger 58 by inserting the cue slide 57 into the split groove and inserting an insertion pin from above.

Above the elongated hole 66a, there is a first hook 70 for rotating the Kew Tape guide arm 25;
Above the elongated hole 66b, second hooks 71 for rotating the key slant pole arm 32 extend horizontally. A chevron-shaped return spring engaging part 73a is provided diagonally above the elongated hole 66a to which one end of the return spring 72 is engaged, while a hook-shaped return spring engaging part 73a is provided to the slide holder 56 to which the other end of the return spring 72 is engaged. A spring engaging portion 73b is provided in a protruding manner. Since the return spring 72 is stretched between the return spring engagement parts 73a and 73b, the QU slide 57 is pulled in a direction opposite to the suction direction of the QU plunger 58.

A cam portion 75 is formed diagonally above the elongated hole 66b, with which a roller 74 supported by the shift roller arm 59 rolls. This cam portion 75 is the tenth
As shown in Figure 13C and Figure 15C,
It has a continuous cam surface including a lower horizontal cam surface 76a, a first inclined cam surface 76b, a second inclined cam surface 76c, and an upper horizontal cam surface 76d.

The shift lever 60 is arranged inside the shift roller arm 59, and both are rotatably supported by the shift lever support pin 65 of the slide holder 56. A roller shaft 77 is horizontally attached to one end of the shift lever 60, and a roller 74 is rotatably supported on it. Two spring locking portions 78a and 79a are provided at predetermined positions on the shift roller arm 59, and a first tension spring 80 is provided between the spring locking portion 78a and a spring locking portion 78b provided on the slide holder 56. However, on the other hand, the spring locking portion 79
a and the spring locking portion 7 provided on the shift lever 60
A second tension spring 81 is stretched between each of the springs 9b and 9b.

The shift lever 60 includes a slide shaft pressing arm 82 that has a flat tip and contacts the lower end of the slide shaft 36 (see FIGS. 8, 11, and 15B) and one of the shift roller arms 59. [See Fig. 13B] A locking pawl 84 that comes into contact with the side end 83 of the
and is provided. The roller 74 supported by the shift roller arm 59 is brought into elastic contact with the cam portion 75 of the cue slide 57 by the first tension spring 80 . In addition, the second tension spring 81 causes the shift roller arm 59 and the shift lever 60 to come into elastic contact with the side end 83 of the shift roller arm 59 and the locking pawl 84 of the shift lever 60.
is rotationally biased.

The above slide holder 56, QU slide 5
7. A QU block consisting of a QU plunger 58, a shift roller arm 59, a shift lever 60, etc. is attached to the lower surface of the frame.

As shown in FIGS. 12 and 14, the QU tape guide arm 25 has a QU slide 57.
A guide arm rotation pin 85 that engages with the first hook 70 is provided to protrude downward. Further, the guide arm biasing spring 86 biases the Q-tape guide arm 25 to rotate counterclockwise toward the drawing. On the other hand, a slant pole arm rotation pin 87 that engages with the second hook 71 of the queue slide 57 is provided on the queue slant pole arm 32 to project downward. Further, the slant pole arm biasing spring 88 biases the key slant pole arm 32 to rotate clockwise toward the drawing. The other ends of the arm biasing springs 86 and 88 are both fixed to the frame. Reference numeral 89 in the figure denotes a first arm stopper, which restricts the rotation of the cue tape guide arm 25 during cueing. Reference numeral 90 denotes a second arm stopper, which restricts the rotation of the queue slant pole arm 32 during queue.

Figures 12 to 16 are for explaining the mechanism of the high-speed playback device during queue.
Figures 2 and 13 A, B, and C show the state before the cue operation; Figures 14 and 15 A, B, and C, and Figure 1
6 each shows the state during cue operation.

In FIG. 12 and FIG. 13, in the state before the cue operation, in other words, during the operation other than the cue,
The Q-plunger 58 is not energized and is in a de-energized state. Therefore, the QU slide 57 is pulled to the right in the drawing by the elasticity of the return spring 72, and the slide support pins 64, 64 are positioned by abutting on the left inner peripheral ends of the elongated holes 66a, 66b, respectively.

As the cue slide 57 moves, the first hook 70 moves the guide arm rotation pin 8 as shown in FIG.
5 and the second hook 71 are respectively engaged with the slant pole arm rotation pin 87 and pulled to the right. As a result, the Q-tape guide arm 25
is rotating clockwise about the support shaft 26 against the elasticity of the guide arm biasing spring 86, and the cue tape guide 24 is separated from the tape 1. On the other hand, the key slant pole arm 32
is rotating counterclockwise about the support shaft 29 against the elasticity of the slant pole arm biasing spring 88, and the key slant pole 33 is separated from the tape 1.

As described above, the roller 74 supported by the shift roller arm 59 is always in elastic contact with the cam portion 75 of the cue slide 57 due to the tensile force of the first tension spring 80. As described above, before the cue operation, the cue slide 57 has moved to the right, so the roller 74 is at the lower horizontal cam surface 76a of the cam portion 75, as shown in FIGS. 13A and 13C. The entire shift roller arm 59 is tilted slightly counterclockwise. On the other hand, as shown in FIG.
Since the shift lever 60 is elastically biased toward the side end 83 of the shift roller arm 59
As a result, the slide shaft pressing arm 82 is separated from the slide shaft 36. Therefore, slide axis 3
6 is pushed down to the lower position by the pressure spring 50, as shown in FIG. 9, and the vertical guide pole 12 is in its normal position.

When performing a cue operation, the cue plunger 58 is energized based on a cue operation signal from a control section (not shown). As a result, the cue slide 57 is moved to the 14th position against the elasticity of the return spring 72.
pulled to the left as shown in Figures and Figure 15;
The first hook 70 separates from the guide arm rotation pin 85, and the second hook 71 separates from the slant pole arm rotation pin 87. As a result, the Kew Tape guide arm 25 rotates counterclockwise around the support shaft 26 as shown by the arrow due to the tensile force of the guide arm biasing spring 86.
4 presses the tape 1 in the direction of the head drum 2, and the rotation is stopped at the position where the cue tape guide arm 25 comes into contact with the first arm stopper 89.
On the other hand, the key slant pole arm 32 rotates clockwise about the support shaft 29 as shown by the arrow due to the tensile force of the slant pole arm biasing spring 88, and the key slant pole 33 moves toward the tape 1.
is pressed toward the head drum 2, and the key slant pole arm 32 is pressed against the second arm stopper 9.
Rotation stops at the position where it touches 0.

Also, as the cue slide 57 moves from the right side to the left side, the roller 74 moves onto the lower horizontal cam surface 7.
6a to the upper horizontal cam surface 76d as shown in FIGS. 15A and 15C while rolling on the first inclined cam surface 76b and the second inclined cam surface 76c. Due to the displacement of the roller 74 due to the movement of the cue slide 57, the shift roller arm 59 is moved by the first tension spring 80.
The shift lever support pin 65 rotates clockwise by a predetermined angle against the elasticity of the shift lever support pin 65. Due to the tensile force of the second tension spring 81, the shift lever 60
follows the shift roller arm 59 and rotates clockwise, thereby causing the slide shaft pressing arm 8 to rotate clockwise.
2 pushes the slide shaft 36 upward in the axial direction against the elasticity of the pressing spring 50 (see FIG. 8). As a result, the lower flange 41, guide roller 46, upper flange 47, and tape 1 are also lifted together with the slide shaft 36 until the upper end of the slide shaft 36 comes into contact with the lower end of the adjusting screw 54, that is, by Δh. In this way, the slide shaft pressing arm 82 (shift lever 6
0), since the rotation is restricted when the slide shaft 36 comes into contact with the adjustment screw 54, the shift lever 60 cannot completely follow the rotation of the shift roller arm 59 mentioned above, and as shown in FIG. As shown, a gap G is formed between the locking pawl 84 of the shift lever 60 and the side end 83 of the shift roller arm 59.
This gap G is provided to allow adjustment of the tape lifting amount Δh of the vertical guide pole 12 by the adjustment screw 54.

FIG. 16 is a developed view of the vicinity of the head drum at the time of queue. As mentioned above, the vertical guide pole 12 is moved axially upwardly, and the lower tsuba 41
The lower edge of the tape 1 is lifted up and separated from the lead guide 5 of the head drum 2, so that the direction of the recording traces A1, B1, . . . . Further, the cue tape guide 24 is moved slightly downward in the axial direction thereof, and the tape 1 is pressed in the F1 direction by the upper collar 91, so that the tape 1 is pushed into the lead guide 5.
A force is applied in the direction of arrow F3 using the point of contact as a fulcrum S1. Furthermore, the key slant pole 33 is tilted slightly toward the tape 1 side.
By being pressed, the tape 1 receives a force in the direction of arrow F2 due to a sliding action. Therefore, the tape 1 is subjected to a force in the direction of arrow F3 using the lower collar 41 of the vertical guide pole 12 as a fulcrum S2. Therefore, F3 is generated by the balance of moments caused by F1 on the tape supply side and F2 on the tape winding side, and the part of the tape 1 that tends to sag away from the lead guide 5 is corrected, and the linearity of the tape 1 is improved. gets better. Further, since the tape 1 is pressed against the lead guide 5 at approximately one point, its movement in the width direction is also restricted, and the running of the tape 1 is stabilized. By improving the linearity of the tape 1, deterioration in S/N can be improved.

In the embodiment described above, the case of queue has been explained, but the case of review will be explained using FIG. 17.

A review slide 92 is disposed between the review slant pole arm 30 and the review tape guide arm 28, and this is connected to the review plunger 9.
It is designed to be attracted by 3, and
The return spring 94 always elastically biases the review plunger 93 in a direction opposite to the suction direction. A first hook 95 is provided on the Revue Slant pole arm 30 side of the Revue Slide 92,
It is designed to be able to engage with a slant pole arm rotation pin 96 that is provided to project downward from the revieuse slant pole arm 30. On the other hand, a second hook 97 is provided on the review tape guide arm 28 side of the review slide 92 so that it can be engaged with a tape guide arm rotation pin 98 provided downwardly protruding from the review tape guide arm 28. There is.

The revieux slant pole arm 30 has a support shaft 26
A review slant pole 31 is rotatably supported at the tip thereof and inclined slightly toward the tape 1 side, and is rotated counterclockwise toward the drawing by a slant pole arm biasing spring 99. energized. The review tape guide arm 28 is rotatably supported by a support shaft 29, has a review tape guide 27 erected at its tip, and is urged to rotate clockwise toward the drawing by a guide arm biasing spring 100. ing. The return spring 9
4. The other ends of the slant pole arm biasing spring 99 and the guide arm biasing spring 100 are indirectly or directly connected to the frame.

Although not shown, as in the case of the queue operation, the horizontal movement of the review slide 92 and the axial movement of the vertical guide pole 11 are performed in association with each other, and the amount of movement of the vertical guide pole 11 is adjusted. Adjustable by means.

FIG. 17 shows the state during review, in which the review slide 92 is pulled to the right in the drawing against the elasticity of the return spring 94 by the excitation of the review plunger 93. As a result of this movement, the revieus slant pole arm 30 rotates counterclockwise toward the drawing against the elasticity of the slant pole arm biasing spring 99.
1 is pressing tape 1. In addition, the review tape guide arm 28 is connected to the guide arm biasing spring 1.
The review tape guide 27 presses the tape 1 by rotating clockwise toward the drawing against the elasticity of the tape 1. By doing this, the portion of the tape 1 that tends to sag away from the lead guide 5 is corrected, and the linearity of the tape 1 is improved. Incidentally, by tilting the reuse slant pole 31 slightly toward the tape 1, it is possible to restrict the tape running so that the tape 1 does not come off the CTL head.

In the above embodiments, a plunger and a return spring are used to move the queue slide and review slide, but it is also possible to slide the queue slide and review slide in a predetermined direction using, for example, a motor and a cam mechanism. You can also do it.

The present invention has the above-described configuration, and can provide a high-speed playback device for a VTR that can further stabilize the running properties of a magnetic tape and provide high-quality images.

[Brief explanation of drawings]

Figures 1, 4, and 5 are tape pattern diagrams;
Fig. 2 is a playback signal level diagram, Figs. 3 and 6 are developed views of the vicinity of the head drum, Fig. 7 is a schematic configuration diagram showing only the parts related to the embodiment of the present invention in a VTR, and Fig. 8 is a vertical diagram. A cross-sectional side view of the main parts of the guide pole and stopper, Fig. 9 is a perspective view of the lower flange receiving bolt and lower flange used for the vertical guide pole, Fig. 10 is an exploded perspective view of the cube block,
Fig. 11 is an assembled side view of the cue block, Fig. 12 is a schematic configuration diagram showing the state before cue operation, Fig. 13
Figure A is a partial side view showing the positional relationship between the cue slide and the shift roller arm in that state, Figure B is a partial side view showing the positional relationship between the slide shaft and the shift lever in that state, and Figure C is a partial side view showing the positional relationship between the slide shaft and the shift lever in that state. A partially enlarged view showing the positional relationship between the cam part and the roller in that state, Fig. 14 is a schematic configuration diagram showing the state during cue operation, and Fig. 15 A shows the position of the cue slide and shift roller arm in that state. Figure B is a partial side view showing the positional relationship between the slide shaft and the shift lever in that state, and Figure C is a partially enlarged view showing the positional relationship between the cam part and the roller in that state. , FIG. 16 is a developed view of the vicinity of the head drum during queue operation, and FIG. 17 is a schematic configuration diagram showing the state during review operation. 1...Magnetic tape, 2...Head drum, 5...
...Lead guide, 9, 10... Inclined guide pole, 11, 12... Vertical guide pole, 24...
Kew tape guide, 27...Review tape guide, 31...Review slant pole, 33...
…Kyuslant Paul.

Claims (1)

[Claims] 1. In a VTR having a head drum 12 equipped with a rotating head and a lead guide 5 against which one edge of the tape 1 on the circumferential surface of the head drum 2 can be brought into contact, tapes are placed on the entrance and exit sides of the tape 1 in the head drum 2, respectively. Vertical guide poles 11 and 12, slant poles 31 and 33, and tape guides 24 and 27 are provided, each having a circumferential surface to be brought into contact with the tape 1 and limiting the position of the tape 1 in the width direction. Sometimes, one of the vertical guide poles 11 and 12 is lifted up and one edge of the tape 1 is guided so that one edge of the tape 1 is separated from the lead guide 5, thereby causing the rotation along the recording trace on the tape 1. The head scans the tape, and the tape is moved by a tape guide corresponding to one of the perpendicular guide poles 11 and 12 among the tape guides 24 and 27.
The other edge of the tape 1 is guided so that one edge of the tape 1 is pushed further than the position where it touches the lead guide 5, and the tape is placed on the upstream side of the lifted vertical guide pole in the tape running direction. A high-speed playback device for a VTR, characterized in that a corresponding slant pole is arranged and the slant pole is tilted so as to be able to push down the tape 1.