JPH0513341B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a rotary head type magnetic recording and reproducing device that is equipped with a mechanism that allows the magnetic tape to travel at high speed while the magnetic tape is wound around a drum. It is.

[Conventional technology]

FIG. 2 is a perspective view showing the structure of a conventional rotating head type magnetic recording/reproducing device. As shown in the figure, a supply reel 1 and a take-up reel 2 are housed in a cassette 14, and a magnetic tape 100 is disposed on a tape running system extending between the supply reel 1 and the take-up reel 2. In this tape running system, several fixing pins 3 are provided to regulate the tape running of the magnetic tape 100, and a movable tension pin 4 that provides back tension to the magnetic tape 100 is also provided. Guide rollers 5 and slant pins 6 are arranged in pairs on the left and right in FIG. 1, and regulate the magnetic tape 100 so that the tape travels stably during recording and reproduction.
A rotary head 8 is attached to the drum 7, and the rotary head 8 writes signals onto the magnetic tape 100 and reads signals from the magnetic tape 100. A lead groove 9 is provided on the side surface of the drum 7, along which the magnetic tape 100 runs. Further, an all-erase head 10 is arranged on the left side of the drum 7, and a control head 11 used for controlling cueing etc. is arranged on the right side of the drum 7. A capstan shaft 12 is provided on the right side of the take-up reel 2. This capstan shaft 12 is rotating at a constant speed, and the pinch roller 13 is pressed against the capstan shaft 12, so that the magnetic tape 100 is fed to the take-up reel 2 side at a constant speed. .

In the configuration of the rotary head type magnetic recording/reproducing apparatus as shown in FIG. , guide roller 5, slant pin 6, drum 7, slant pin 6, guide roller 5, control head 11, fixed pin 3, capstan shaft 12, pinch roller 13, and fixed pin 3, and then It is wound onto the take-up reel 2. When searching at high speed, magnetic tape 10
The number of rotations of the capstan shaft 12 is increased to cause the magnetic tape 100 to travel while the winding of the magnetic tape 100 around each member remains the same. In addition, high-speed feeding,
At the time of rewinding, the magnetic tape 100 is placed in the cassette 14 and then fast-forwarded and rewound within the cassette 14.

[Problem that the invention seeks to solve]

In the conventional rotating head type magnetic recording/reproducing device as described above, during high-speed searching, the pinch roller 1
3 remains in contact with the capstan shaft 12, there is a limit to the tape feeding speed of the magnetic tape 100, and since the magnetic tape 100 remains wrapped around each of the above members, the tape running load is large. There were problems such as the tape feeding speed could not be increased and tape damage was large. Furthermore, in order to fast-forward or rewind the magnetic tape 100, the magnetic tape 100 must be put in and taken out of the cassette 14 each time, which generally gives the user a bad impression that ``tape takes time to access.'' There was a problem.

The present invention has been made to solve this problem, and an object of the present invention is to provide a rotating head type magnetic recording and reproducing device that allows high-speed searching with the magnetic tape wound around the drum.

[Means for solving problems]

The rotary head type magnetic recording/reproducing apparatus according to the present invention operates to detach the pinch roller from the capstan during high-speed retrieval, and in conjunction with the detachment operation, causes the tension pin to escape from the tape running system.

[Effect]

In the rotating head type magnetic recording/reproducing apparatus of the present invention, the interlocking operation of the pinch roller and tension pin during high-speed retrieval reduces the winding angle of the magnetic tape around each member in the tape running system, so that the tape running load is reduced. It plays a role in reducing the

〔Example〕

FIG. 1 is a diagram for explaining the operating mode of the configuration of a rotating head type magnetic recording/reproducing apparatus which is an embodiment of the present invention, and the same or corresponding parts as in FIG. 2 above are indicated using the same reference numerals. Yes, the detailed explanation will be omitted. As shown in the figure, 15 is a pinch roller holder, and this pinch roller holder 1
5 is rotatable around a shaft 16 and biased counterclockwise by a spring 17. A pinch roller 13 is attached to one end of the pinch roller holder 15.
is disposed, and the other end is in contact with the lever 18. A guide roller 19 is disposed on the shaft 16, and the magnetic tape 100 leaving the pinch roller 13 is wound onto the take-up reel 2 after passing through the guide roller 19. The lever 18 is rotatable around the shaft 20 and is urged by a spring 21 so as to be in constant contact with the other end of the pinch roller holder 15. The other end of the spring 21 is connected to a lever 24 via a wire 22. The lever 24 is rotatable around the shaft 23, and a plunger 26 attached to the lever 24 through a wire 25 reciprocates, so that
Lever 24 rotates in both directions. Also, lever 2
4 is connected to a lever 28 via a wire 27. The lever 28 is rotatable around a shaft 29, and the lever 28 is connected to a lever 31 via a plate 30. The lever 31 is rotatable around the shaft 32, and a pin 33 provided at the other end of the lever 31 engages the tension arm 3.
It is arranged so as to press 4. The tension arm 34 is rotatable around the shaft 35, and the tension pin 4 is disposed at the other end of the tension arm 34.
4 is biased counterclockwise by a spring 36.

In the configuration of the rotating head type magnetic recording/reproducing apparatus as shown in FIG.
3. The positions of the lever 28, lever 31, and tension arm 34 indicate the states during recording and reproduction. At this time, the plunger 26 moves the wire 2 upward.
5, the lever 23 rotates clockwise. As a result, the pinch roller 13 is pressed against the capstan shaft 12 in order to rotate the lever 18 counterclockwise and rotate the pinch roller holder 15 clockwise. At the same time, the spring 21 also stretches by a certain value, so the pinch roller 13
is the capstan shaft 12 with a certain spring force.
will be forced to. On the other hand, lever 24
As the lever 28 rotates clockwise, the lever 28 rotates clockwise.
The pin 33 is also used to rotate the lever 31 clockwise.
detaches from the tension arm 34. As a result, the position of the tension arm 34 depends only on the spring force of the spring 36 and the tension of the magnetic tape 100.

Next, the positions of the pinch roller holder 15, the lever 18, the lever 24, the lever 28, the lever 31, and the tension arm 34 shown by broken lines in FIG. 1 show the state during high-speed retrieval. At this time, as the plunger 26 moves downward, the lever 24 rotates counterclockwise and the spring 21 is loosened, so that the pinch roller 13 is separated from the capstan shaft 12 by the spring force of the spring 17. On the other hand, since each lever 28 and lever 31 rotate counterclockwise, the tension arm 34 is rotated clockwise by the pin 33, and the tension pin 4 is returned to a position where it does not come into contact with the magnetic tape 100. As a result, during high-speed retrieval, the magnetic tape 101 coming out of the supply reel 1 includes the fixed pin 3, the guide roller 5, the slant pin 6, the drum 7, the slant pin 6, the guide roller 5, the guide roller 19, and the fixed pin 3. After winding only , take-up reel 2
It will be wound up.

In the above embodiment, as a driving source for interlocking the pin roller 13 and the tension pin 4,
Although the plunger 26 is shown, the operation of a motor or the like may be changed to reciprocating motion.

〔Effect of the invention〕

As explained above, the present invention has a rotary head type magnetic recording/reproducing device in which the pinch roller is separated from the capstan during high-speed retrieval, and the tension pin is released from the tape running system in conjunction with the separation operation. By keeping the magnetic tape wrapped around the drum, the tape running load is reduced, making it possible to perform searches several hundred times faster without causing tape damage.This has led to the prejudice that magnetic recording and reproducing devices using tape have long access times. This provides an excellent effect in that it is possible to obtain a rotary head type magnetic recording/reproducing device which is very easy to use for the user by eliminating as much as possible.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining the operating mode of the configuration of a rotating head type magnetic recording/reproducing apparatus which is an embodiment of the present invention, and FIG. 2 is a perspective view showing the configuration of a conventional rotating head type magnetic recording/reproducing apparatus. It is. In the figure, 1... Supply reel, 2... Take-up reel, 3... Fixed pin, 4... Tension pin, 5, 19... Guide roller, 6... Slant pin, 7... Drum, 8... Rotation. Head, 9...
Lead groove, 10...All erase head, 11...Control head, 12...Capstan shaft, 13...Pinch roller, 14...Cassette,
15...Pinch roller holder, 16, 20, 2
3, 29, 32, 35...Shaft, 17, 2
1, 36... spring, 18, 24, 28, 31...
Lever, 22, 25, 27... Wire, 26...
Plunger, 30... plate, 33... pin,
34...Tension arm, 100, 101...
It's magnetic tape. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. A rotary head magnetic recording and reproducing device having a pinch roller that presses a magnetic tape against a capstan and runs the magnetic tape during recording and reproduction, and a tension pin that controls the tape tension of the magnetic tape. , a plunger 26 that generates a driving force, a lever 24 rotatable around the shaft 23, a wire 25 whose both ends are rotatably supported by the plunger 26 and the lever 24, respectively, and the shaft 2.
a lever 28 which is rotatable about a shaft 32; a wire 27 whose both ends are rotatably supported by the lever 24 and the lever 28, respectively; a lever 31 which is rotatable about a shaft 32; Lever 2
8 and the lever 31, respectively, the tension pin is fixed to one end, the other end is contactable with the pin 33 disposed on the lever 31, and the plate 30 is rotatably supported by the shaft 35. A tension arm 34 is rotatable and biased in a direction in which the tension pin enters the tape running system; the pinch roller is fixed to one end of the tension arm 34; The pinch roller holder 15 is biased in a direction in which the roller is pressed against the capstan, and the pinch roller holder 15 is rotatable around a shaft 20, one end of which is capable of contacting the pinch roller holder 15, and A lever 18 biased in a direction opposite to the biasing direction, a wire 22 rotatably supported at one end to the lever 24, and a wire 22 rotatably supported at both ends to the lever 18 and the wire 22, respectively. It is provided with a spring 21, and transmits all the driving force of the plunger 26 through a rotational movement during high-speed search, to move the tension pin to a position separated from the tape running system, and to separate the pinch roller from the capstan. A rotary head type magnetic recording and reproducing device characterized by being equipped with a mechanism that performs the following operations in conjunction with each other.