JPH0620342A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To attain the miniaturization in a level direction and the thining in a direction of thickness of a VTR or the like. CONSTITUTION:A pinch roller 33 is freely rotatably provided on the end part of a pinch roller arm 34 and the pinch roller arm 34 is rotated around a shaft 35. A capstan rotor 27A is arranged near to a tape cassette 11 with a prescribed gap and without overlapping with the tape cassette 11 on a plane, and the rotation shaft 35 of the pinch roller arm 34 is disposed near to the about nearest part of the gap between the capstan rotor 27A and the tape cassette 11. By arranging the rotation shaft 35 at the gap between the capstan rotor 27A and the tape cassette 11, the length of a bearing support in the rotation shaft 35 of the pinch roller arm 34 is set longer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention forms a predetermined tape running path by pulling out a magnetic tape from a tape cassette and winding it around a rotary cylinder in a predetermined state, and a magnetic tape is provided between a capstan and a pinch roller. A video tape recorder (hereinafter abbreviated as VTR) that is particularly suitable for miniaturization and thinning, and relates to a tape drive device that drives a tape by sandwiching the tape.
The present invention relates to a magnetic recording / reproducing apparatus suitable for constructing a.

[0002]

2. Description of the Related Art In recent years, VTRs have tended to be smaller and thinner. Especially, in portable VTRs, not only electric circuits,
To reduce the size and thickness of the mechanism, efforts are being made to reduce the size and thickness of the mechanical chassis and each drive mechanism.
The conventional magnetic recording / reproducing apparatus of the helical scan type will be described below by taking the first and second methods as examples.

3 and 4 are a plan view of a main part of a first conventional magnetic recording and reproducing apparatus of a helical scan system and a side sectional view showing a pinch roller pressure-bonded state, and FIGS.
FIG. 3A is a plan view of a main part of a second conventional helical scan type magnetic recording / reproducing apparatus and a side sectional view showing a pinch roller pressure-bonded state. In FIG. 3, the magnetic tape 13 wound around the supply reel 12 of the cassette 11 includes an inlet side guide roller 14, an inlet side inclined post 15, an outlet side guide roller 16, an outlet side inclined post 17 and a tension post 18.
Is drawn out from the cassette 11 as in the drawing paths A, B and C. Then, while being mounted on the rotary cylinder 19, it is attached to the supply roller 20, the erasing head 21, the limiter posts 22A, 22B and 23, the voice erasing head 24, and the voice control head 25, respectively. Furthermore, the magnetic tape 13 sandwiched between the pinch roller 26 and the capstan 27 is
The capstan 27 is transferred by being rotated in the counterclockwise direction, and is wound around the winding reel 28 in the cassette 11. The operation of this magnetic recording / reproducing apparatus is as shown in the partial side view of the pinch roller pressure bonding state in FIG.
After the magnetic tape 13 is mounted on the rotary cylinder 19 and a regular tape running path is formed, the magnetic tape 13 is lowered by the lifting cam to pass through the state of the pinch roller 26B, and then the state of the pinch roller 26C is set. It is configured to be pressure-bonded to 27, and to hold and drive the magnetic tape 13.

In the tape running system of the magnetic recording / reproducing apparatus of the first conventional example, the opening 11A of the tape cassette is used.
Since the distance from to the position of the capstan 27 is long, the pinch roller 26 is not suitable for moving from the cassette opening 11A. Therefore, the pinch roller 26 is arranged above the apparatus, and when the pinch roller is pressure-bonded, the pinch roller 26 is lowered and then rotationally pressure-bonded to drive the tape.

In the tape traveling system of the magnetic recording / reproducing apparatus of the second conventional example, after the magnetic tape 13 is mounted on the rotary cylinder 19, the capstan placed in the small opening 11B of the cassette. A pinch roller 26 disposed on the outside of the cassette 27 is rotated from the outside of the cassette and pressed against it, and the capstan 27 is rotated clockwise to drive the tape. In this tape running system, as shown in the partial sectional view of FIG. 6, the capstan rotor 27A is arranged below the cassette 11.

[0006]

However, in the configuration of the first conventional magnetic recording / reproducing apparatus described above, the pinch roller 26 is normally disposed above the mechanism and is lowered when the tape is driven to move to the capstan 27. To crimp
A space for holding the pinch roller 26 on standby is required above, and the overall thickness becomes thick, so that it is not possible to make the device thinner. Further, in the configuration of the second conventional magnetic recording / reproducing apparatus, since the capstan 27 is arranged at the opening 11B in the cassette, the capstan rotor portion 27A is located at the bottom of the cassette. There was a problem that the thickness could not be made thinner than the thickness of the rotor part. That is, the conventional VTR mechanism has a problem that it cannot be thinned even though it can be miniaturized in the plane direction.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a magnetic recording / reproducing apparatus capable of achieving reduction in size and thickness in the planar direction.

[0008]

In order to achieve the above object, the present invention draws a magnetic tape from a tape cassette mounted on the apparatus main body by a guide member, and the magnetic tape is attached to a rotary cylinder arranged outside the tape cassette. A tape running means for forming a tape running path by winding the tape in a predetermined state and a capstan rotor are arranged outside the cassette in a plane, and the capstan rotor is coaxially provided for a predetermined rotation. The magnetic tape is arranged in the tape cassette opening along with the capstan that rotates by a number and the tape pull-out guide member, and is rotated around the rotation center of the rotation arm after the tape running path is formed and pressure-bonded to the capstan. And a pinch roller for driving the tape by sandwiching the capstan rotor between the capstan rotor and the tape cassette at a predetermined distance. Arrangement and a magnetic recording and reproducing apparatus characterized in that a turning support portion of the rotating arm of the pinch rollers in the vicinity substantially closest part of the clearance portion of the capstan rotor and a tape cassette.

[0009]

Therefore, according to the magnetic recording / reproducing apparatus of the present invention, since the capstan rotor is planarly positioned outside the cassette and arranged near the cassette, the planar area of the mechanism is reduced. As the mechanism is downsized and the capstan rotor does not overlap the cassette in a plane, the mechanism can be made thin.
Moreover, since the pinch roller arm rotates about the rotation center and the length of the bearing support portion can be ensured to be as long as possible, accurate and stable pinch roller pressure bonding and tape driving can be realized.

[0010]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a plan view showing a tape running system of a helical scan type magnetic recording / reproducing apparatus according to an embodiment of the present invention, and FIG. 2 is a side sectional view of a pinch roller crimping mechanism section thereof. In FIG. 1, the magnetic tape 13 is a cassette.
The guide roller 14 is wound around the supply reel 12 of 11, and the inlet side guide roller 14 and the inlet side inclined post 15 and the outlet side guide roller 16 and the outlet side inclined post 17 and the tension post 18 are provided.
Is drawn out from the cassette 11 as in the drawing paths A, B and C. The magnetic tape 13 is mounted on a rotating cylinder 19 that rotates counterclockwise, and the fixed posts 30, 31, the erasing head 21, and the impedance roller are mounted.
32, the limiter post 22, the voice erasing head 24, and the voice control head 25 are respectively attached to form a tape running path in the pulled-out state.

27 is a capstan that rotates at a constant speed,
27A is a capstan rotor. 33 is a pinch roller, which is 33A in the tape cassette before the tape running path is formed.
The magnetic tape 13 is arranged at a position and, after the tape running path is formed, is rotated around the support shaft 35 to be pressed against the capstan 27 and the magnetic tape 13 is transferred. The pinch roller 33 is rotatably provided at the end of the pinch roller arm 34, and the pinch roller arm 34 rotates about a support shaft 35. The support shaft 35 is press fitted into the chassis 36 as shown in FIG. A groove 37 is provided at the other end of the pinch roller arm 34. The capstan rotor 27A is arranged in proximity to the tape cassette 11 with a predetermined gap so as not to overlap the tape cassette 11 in a plan view, and the rotation support shaft 35 of the pinch roller arm 34 forms a tape with the capstan rotor 27A. The cassette 11 is provided in the vicinity of the closest portion of the gap. Reference numeral 38 denotes a motor, and the rotation of the motor is decelerated via the worm gear 39, gears 40, 41 and transmitted to the gear 42. Pin 43 on gear 42
Is formed on the pinch roller arm 34.
Is engaged with the groove 37.

Next, the operation of the magnetic recording / reproducing apparatus of the above embodiment will be described. First, after the tape running path is formed, the motor 38 rotates to rotate the gears 40, 41, 42. By rotating the gear 42 in the counterclockwise direction in this way, the pin 43 on the gear 42 is driven to engage with the pin 37 engaged with the groove 37.
The movement of 43 causes the pinch roller arm 34 to rotate clockwise. At this time, the pinch roller 33 shifts from the state of the pinch roller 33A shown by the broken line in FIG. 1 to the state of the pinch roller 33B shown by the solid line in FIG.
The magnetic tape 13 is sandwiched between the magnetic tape 13 and the magnetic tape 13 by the constant speed rotation of the capstan 27, and the capstan 27 rotates counterclockwise in the tape reproducing state. It works like winding up. By arranging the rotation support shaft 35 in the gap between the capstan rotor 27A and the tape cassette 11 in this manner, the bearing support length of the rotation support shaft 35 of the pinch roller arm 34 can be set long.

Therefore, in this embodiment, since the capstan rotor 27A is arranged in the vicinity of the cassette outside the cassette, the proportion of the plane area of the mechanism is reduced, and the magnetic recording / reproducing apparatus is miniaturized. At the same time, since the capstan rotor 27A does not overlap the tape cassette in a plane, the thickness of the mechanism can be reduced. Moreover, since the pinch roller arm 34 rotates about the rotation center and the length of the bearing support portion can be ensured to be as long as possible, highly accurate and stable pinch roller crimping and tape driving can be realized.

[0014]

As described above, according to the present invention, the magnetic tape is pulled out from the tape cassette mounted on the main body of the apparatus by the guide member, and the magnetic tape is wound in a predetermined state on the rotary cylinder arranged outside the tape cassette. The tape running means for forming a tape running path by turning and the capstan rotor are arranged outside the cassette in a plane, and
A capstan which has the capstan rotor on the same axis and rotates at a predetermined number of rotations, and the tape pull-out guide member are arranged in the tape cassette opening, and are rotated around the rotation center of the rotation arm after the tape running path is formed. And a pinch roller for driving the tape by pinching the magnetic tape by pressing it against the capstan, and disposing the capstan rotor close to the tape cassette at a predetermined interval in plan view. Since the magnetic recording / reproducing apparatus is characterized in that the rotation supporting portion of the rotation arm of the pinch roller is arranged in the vicinity of the closest portion of the gap portion of the tape cassette, the capstan rotor is provided outside the tape cassette. In addition, since it is arranged in the vicinity of the tape cassette, the plane area of the tape drive mechanism is reduced, and the entire magnetic recording / reproducing apparatus is Together are-type, and the thickness of the mechanism because capstan rotor does not overlap the tape cassette in plan view, small, but which can create an optimal magnetic recording and reproducing apparatus for thinning.

Moreover, since the pinch roller arm rotates about the rotation center and the length of the bearing support portion can be ensured to be as long as possible, the pinch roller arm is a compact and thin magnetic recording / reproducing device, and the pinch is stable with high accuracy. Roller pressure bonding and tape drive are realized, and excellent stability in quality such as recording and playback can be ensured, and it has the effect of achieving compactness and thinness of the device and improvement in quality as a VTR. is there.

[Brief description of drawings]

FIG. 1 is a plan view showing a tape running drive system of a helical scan type magnetic recording / reproducing apparatus according to an embodiment of the present invention;

FIG. 2 is a side sectional view showing the pinch roller crimping mechanism portion of FIG.

FIG. 3 is a plan view showing a main part of a magnetic recording / reproducing apparatus of a first conventional example,

4 is a side sectional view showing the pinch roller crimping mechanism portion of FIG. 3,

FIG. 5 is a plan view showing a main part of a magnetic recording / reproducing apparatus of a second conventional example,

6 is a side cross-sectional view showing the pinch roller crimping mechanism portion of FIG.

[Explanation of symbols]

 11 tape cassette 13 magnetic tape 14 inlet side guide roller 15 tilting post 16 outlet side guide roller 17 tilting post 19 rotating cylinder 27 capstan 27A capstan rotor 33 pinch roller 34 pinch roller arm 35 turning spindle

Claims (1)

[Claims] 1. A tape running path is formed by pulling out a magnetic tape from a tape cassette mounted on an apparatus main body by a guide member and winding the magnetic tape in a predetermined state on a rotary cylinder arranged outside the tape cassette. A tape cassette, in which a tape running means and a capstan rotor are arranged outside the cassette in a plane, and the capstan rotor is coaxial and rotates at a predetermined rotation speed, and the tape pull-out guide member. A pinch roller that is disposed in the opening and that rotates around the center of rotation of the rotating arm after the tape running path is formed and presses the capstan to pinch the magnetic tape to drive the tape. The stun rotor is arranged close to the tape cassette with a predetermined space in the plane, and the gap between the capstan rotor and the tape cassette is A magnetic recording / reproducing apparatus in which a rotation support portion of the rotation arm of the pinch roller is disposed in the vicinity of a substantially closest portion of the portion.