JPH09282739A - Tension regulator mechanism for recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a spring tension adjusting amt. of a tension coil spring proportional to a moving amt. of a tension regulator arm. SOLUTION: One end of a tension coil spring 28 for spring-energizing a tension regulator in the direction of imparting back tension to a tape in a tape traveling system is supported by the tension regulator arm, while the other end can selectively be restrained by plural restraining parts 35a, 35b and 35c provided at stepwise different distances in a spring tension adjusting mechanism 29. Then, the spring tension adjusting mechanism 29 is capable of turning around a turning fulcrum axis 37, and the turning fulcrum axis 37 is set so as to be an operating point of spring tension of the tension coil spring 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus having a tape running system in which a magnetic tape as an information recording medium is wound around a rotating drum, and a tape tension of a magnetic tape pulled out from a tape reel on a supply side. The present invention relates to a mechanical tension regulator mechanism for controlling the above, and particularly to a spring tension adjusting mechanism of a spring member for applying back tension to a tension regulator arm.

[0002]

2. Description of the Related Art An example of a spring tension adjusting mechanism for a spring member of a tension regulator mechanism of this type will be described with reference to FIG.

Reference numeral 50 is a tension regulator arm of a tension regulator mechanism on the tape supply side,
The fulcrum shaft 51 is rotated about the fulcrum. One end of a tension regulator band 53 is fixed to the tension regulator arm 50 via a band support portion 52 provided on the fulcrum shaft 51 side, and the band 53 is a reel stand 54 on the supply side.
The other end is supported by the band length adjusting mechanism 55. The tape T drawn from the tape reel 56 of the reel stand 54 is hooked on the tape guide 57 of the tension regulator arm 50, and the guide roller 5
It is wound around a rotary drum (not shown) via 8, 59.

On the other hand, the tension regulator arm 50
Has one end of the tension coil spring 60 fixed to the support portion 50a and the other end of the support portion 61 of the spring tension adjusting member 61.
It is fixed to a. As a result, the tape guide 57
Back tension is applied to the tape T that is wound around. The spring tension adjusting member 61 is rotatable around a fulcrum shaft portion 62, and the ratchet 63 that rotates together with the spring tension adjusting member 61 about the fulcrum shaft portion 62 is a rotating center.
Is provided. That is, by rotating the fulcrum shaft portion 62 with a tool or the like, the support portion 61a rotates together with the spring tension adjusting member 61, and the spring tension of the tension coil spring 60 can be finely adjusted.

[0005]

By the way, by rotating the above-mentioned conventional spring tension adjusting member 61, the tension of the tension coil spring 60 is relaxed (counterclockwise direction) as shown by the phantom line in FIG. When adjusting, coil spring 60
The support portion 61a that fixes the unit also moves together.
That is, the point of action of the tension coil spring 60 (the support portion 61
a) also moves, and the magnitude of the vector that the tension coil spring 60 applies to the tension regulator arm 50 in the back tension direction becomes small. Therefore, with respect to the action point (support portion 61a) shown by the solid line. An invalid component of the vector amount (magnitude) will be generated. That is, the magnitude of the spring tension of the tension coil spring 60 is not necessarily proportional to the amount of movement given to the tension regulator arm 50.

Further, since the conventional spring tension adjusting member 61 has a large structure, a large space is required for installation.

The present invention has been made to solve the above-mentioned problems, and a tension regulator of a recording / reproducing apparatus capable of making the adjustment amount of the spring tension of the tension coil spring and the movement amount of the tension regulator arm proportional to each other. The purpose is to get a mechanism.

[0008]

In order to achieve the above object, a tension regulator mechanism of a recording / reproducing apparatus according to the present invention is a spring for biasing a tension regulator in a direction of applying back tension to a tape of a tape running system. One end of the member is supported by the tension regulator arm, and the other end can be selectively locked to a plurality of locking portions provided in the spring tension adjusting mechanism with different distances stepwise. It is possible to rotate about an axis,
The rotation fulcrum shaft serves as a point of application of spring tension of the spring member.

With this configuration, when the spring member is selectively locked to the plurality of locking portions of the spring tension adjusting mechanism to adjust the spring tension, the spring tension adjusting mechanism rotates in the spring tension direction. It is possible to rotate about the axis, and the rotation fulcrum shaft is always the point of application of the spring tension of the spring member, and therefore,
Since the vector direction does not change, the adjustment amount of the spring tension of the spring member can be made proportional to the movement amount of the tension regulator arm.

Further, since the spring tension adjusting mechanism is provided with the stopper portion for restricting the rotation range with respect to the rotation fulcrum shaft,
It is possible to position the mounting direction of the spring tension adjusting mechanism to be mounted on the pivot shaft.

Further, since the plurality of locking portions of the spring tension adjusting mechanism are formed at equal intervals, the adjustment of the spring tension of the spring member can be changed to the same spring tension amount.

Further, the rotation fulcrum shaft of the spring tension adjusting mechanism is supported by an operating member which rotates in conjunction with the operation mode of the tape, and by moving the spring tension adjusting mechanism in accordance with the operation mode, the spring of the spring member is moved. By making the tension variable, the tape tension acting on the tension regulator can be switched between the FF / REW mode and the recording / reproducing mode.

Further, since the tension regulator mechanism is a double tension regulator arranged also on the winding side of the magnetic tape, the tape tension is adjusted in all the tape running systems on the tape supply side and the tape winding side. be able to.

Further, the tension regulator mechanism is applied to a video cassette recorder capable of using two or more kinds of tape cassettes having different sizes, so that the back tension of the tapes in the tape cassettes having different sizes is made uniform. be able to.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tension regulator mechanism of a recording / reproducing apparatus according to the present invention will be described below with reference to the drawings by taking a VCR device adopting a double tension regulator as an example.

First, the tape running system of the VCR device will be described with reference to FIG. Reference numerals 1 and 2 are mechanical chassis 3
A pair of supply side reel base and take-up side reel base arranged above. The tape supply side reel 5 and the tape winding side reel 6 of the tape cassette 4 indicated by imaginary lines are mounted on the reel stands 1 and 2.

Tape supply reel 5 of tape cassette 4
The magnetic tape T pulled out from the fixed guide roller 7 passes through a tape guide 9 of a tension regulator arm 8 on the supply side, a vertical guide 11 supported by a slide member 10 and an inclined guide 12, and a rotary drum having a magnetic head. The magnetic tape T is helically wound from the inlet side of the rotary drum 13, and the magnetic tape T is pulled out from the outlet side of the rotary drum 13 and wound via a tilt guide 15 and a vertical guide 16 supported by a slide member 14, a capstan 17, and a pinch roller 18. Tension regulator arm 19 on the take side
The tape running system is constructed in which the fixed guide roller 21 is wound around the tape winding side reel 6 via the tape guide 20 of FIG.

Both slide members 10 and 14 can be moved to the unloading position via a link by a loading gear (not shown) along slide grooves 22a and 22b formed in the mechanical chassis 3. Also, both slide members 1
0 and 14 are positioned on the fixed blocks 23 and 24 in the loading position of FIG.

The tension regulator mechanism according to the present invention will now be described. The tension regulator arm 8 on the supply side is rotatable around a fulcrum shaft 25 as a fulcrum. The tension regulator arm 8 has one end of the band 26 hung on the supply reel stand 1 described above.
6a, and the other end of the band 26 is supported by the support member 2
It is supported by a fixed pin 27 on the mechanical chassis 3 via 6b. Then, one end of the tension coil spring 28 is locked to the support piece 8a, and the other end of the tension regulator arm 8 is the spring tension adjusting mechanism 2 which is an essential part of the present invention.
9 supported. As a result, the tension regulator arm 8 applies back tension to the magnetic tape T stretched over the tape guide 9.

The tension regulator arm 19 on the take-up side can also be turned with the fulcrum shaft 30 as a turning fulcrum, and the tension regulator arm 19 also has one end of the band 31 hung on the take-up reel stand 2 described above. Support member 3
1a and the other end of the band 31 is supported by the support member 3
It is supported by a fixed pin 32 on the mechanical chassis 3 via 1b. Similarly, in the tension regulator arm 19, one end of the tension coil spring 33 is locked to the support piece 19 a, and the other end is supported by the spring tension adjusting mechanism 34. As a result, the tension regulator arm 19
Back tension is applied to the magnetic tape T laid over the tape guide 20.

Now, the details of the spring tension adjusting mechanisms 29 and 34 will be described. Both spring tension adjusting mechanisms 29, 34
Have the same configuration, one spring tension adjusting mechanism 29 will be described with reference to FIG.

The spring tension adjusting mechanism 29 has a plurality of (three in this embodiment) slit-like locking portions 35 having different distances in a stepwise manner.
a, 35b, 35c are formed, and each locking portion 35 is formed.
The distances a, 35b, and 35c are set to equal distances at which the inherent tension error (for example, ± 20%) generated in the tension coil spring 28 is absorbed.

The spring tension adjusting mechanism 29 is rotatably supported by a rotation fulcrum shaft 37 projecting from an arm-shaped actuating member 36, and a retaining piece 38 provided on the actuating member 36.
It is prevented from slipping out. Further, stopper parts 39a and 39b are formed in a part of the spring tension adjusting mechanism 29,
The stopper portions 39a, 39b hit the retaining pieces 38 to regulate the range of rotation of the spring tension adjusting mechanism 29.

On the other hand, the above-mentioned actuating member 36 can be turned around a support shaft 40 supported by a mechanical chassis (not shown), and an actuating piece 41 is provided on the opposite side of the actuating member 36 with the support shaft 40 interposed therebetween. Is provided, and the operating member 41 is provided with a driving member 4
2 are engaged. The drive member 42 is in a non-operating state in the FF / REW mode, for example, when the pinch roller 18 is separated from the capstan 17 as shown in FIG. In the non-operating state of the drive member 42, the tension coil spring 2
The tension of 8 is hardly generated. Here, when the pinch roller 18 is rotated by a drive mechanism (not shown) in the REC (recording) / PB (playback) mode in which the pinch roller 18 is pressed against the capstan 17 with the tape sandwiched between them, the operating piece 41 is kicked and the operating member is driven. 36 is rotationally driven as shown by an imaginary line in FIG. 3, whereby the spring tension adjusting mechanism 29 as a whole moves and a predetermined spring tension is generated in the tension coil spring 28.

The spring tension adjusting mechanism 29 thus constructed
Can selectively change the tension of the tension coil spring 28 to the three locking portions 35a, 35b, 35c having different distances to change the spring tension in three steps.

Next, the operation of the spring tension adjusting mechanism 29 will be described. FIG. 2 shows a state in which the tension coil spring 28 is supported by the locking portion 35b at the center of the spring tension adjusting mechanism 29. That is, since the spring tension adjusting mechanism 29 is pulled around the rotation fulcrum shaft 37 in the direction in which the spring tension of the tension coil spring 28 is generated, the rotation fulcrum shaft 37 and the locking portion 35b are pulled by the tension coil spring 28. The rotation fulcrum shaft 37 becomes the point of action of the tension coil spring 28.

Here, the tension coil spring 28 is locked by the engaging portion 35 of the spring tension adjusting mechanism 29 as shown by the phantom line in FIG.
When the spring tension adjusting mechanism 29 is supported by a, the spring tension adjusting mechanism 29 is pulled around the rotation fulcrum shaft 37 in the direction in which the spring tension of the tension coil spring 28 is generated as in the case described above. The locking portion 35a is aligned with the tension coil spring 28, and the rotation fulcrum shaft 37 serves as an action point of the tension coil spring 28.

As described above, in the spring tension adjusting mechanism 29 according to the present invention, the tension coil spring 28 is used for any one of the locking portions 3.
Even if it is supported by 5a, 35b and 35c, the action point of the tension coil spring 28 is always the rotation fulcrum shaft 37, so the vector direction does not change. Therefore, there is an advantage that the amount of rotation applied to the tension regulator arm 8 can be made proportional to the strength of the tension of the tension coil spring 28.

Further, in the FF / REW mode, the spring tension of the tension coil spring 28 is reduced to loosen the back tension applied to the tape guide 9 of the tension regulator, and in the REC / PB mode, the tension coil spring 28.
The spring tension adjusting mechanism 29 is moved through the operating member 36 so that a predetermined back tension is generated in the tape guide 9 so that the back tension can be switched. It is possible to reduce the burden on the tape running at high speed in the mode.

Further, by making the above-mentioned actuating member 36 in two or more stages so that a plurality of back tensions can be switched, tapes of different sizes can be used in a VCR device capable of using two or more kinds of tape cassettes of different sizes. The back tension of the tape can be adjusted according to the cassette.

The present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.

In the above embodiment, the tension coil spring 2 is used.
Although the description has been given of the case in which there are three locking portions that support the tension coil 8, the tension coil spring 28 can be increased by increasing the number as needed.
It is possible to further finely adjust the spring tension of.

In the present invention, an example in which the spring tension adjusting mechanism of the tension coil spring of the tension regulator is applied to the VCR device has been described, but the invention is also widely applicable to audio devices.

[0034]

As described above, in the tension regulator mechanism of the recording / reproducing apparatus according to the present invention, one end of the spring member for biasing the tension regulator in the direction of applying back tension to the tape of the tape traveling system has the tension regulator arm. The other end of the spring tension adjusting mechanism can be selectively locked to a plurality of locking portions provided in the spring tension adjusting mechanism and having different distances in a stepwise manner. The spring tension adjusting mechanism can rotate about a rotation fulcrum shaft. Since the rotation fulcrum shaft is configured to be the action point of the spring tension of the spring member, the action point of the spring member is always the rotation fulcrum shaft, so the vector direction does not change, There is an effect that the amount of rotation given to the tension regulator arm can be proportional to the strength of the spring tension of the spring member. This provides a highly reliable tension regulator mechanism for the recording / reproducing apparatus.

Further, since the spring tension adjusting mechanism is provided with the stopper portion for restricting the rotation range with respect to the rotation fulcrum shaft,
It is possible to position the mounting direction of the spring tension adjusting mechanism to be mounted on the pivot shaft.

Further, since the distances between the plurality of locking portions of the spring tension adjusting mechanism are formed at equal intervals, the spring tension of the spring member can be adjusted to the same spring tension amount.

Further, the rotation fulcrum shaft of the spring tension adjusting mechanism is supported by an operating member which rotates in association with the operation mode of the tape, and the spring of the spring member is moved by moving the spring tension adjusting mechanism according to the operation mode. By making the tension variable, it is possible to obtain a suitable back tension in the FF / REW mode and the recording / reproducing mode.

Further, since the tension regulator mechanism is a double tension regulator arranged also on the winding side of the magnetic tape, the tape tension is adjusted in all the tape running systems on the tape supply side and the tape winding side. be able to.

Further, the tension regulator mechanism is applied to a video cassette recorder in which two or more kinds of tape cassettes having different sizes can be used, so that the back tension of the tape corresponding to the tape cassettes having different sizes can be obtained. be able to.

[Brief description of drawings]

FIG. 1 is a plan view of a tape running system having a tension regulator mechanism provided with a spring tension adjusting mechanism for a tension coil spring according to the present invention.

FIG. 2 is an enlarged view of a spring tension adjusting mechanism and its periphery.

FIG. 3 is an enlarged view of the spring tension adjusting mechanism and its periphery.

FIG. 4 is a configuration diagram of a conventional spring tension adjusting mechanism for a tension coil spring.

[Explanation of symbols]

8,19 Tension regulator arm, 28,33
Tension coil spring, 29, 34 spring tension adjusting mechanism, 35a, 35b, 35c locking portion, 36 actuating member, 37 rotation fulcrum shaft, 39a, 39b stopper portion,
41 working piece, 42 driving member, T magnetic tape

Front page continued (72) Inventor Masaki Takase 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Akihiro Uetake 6-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Co., Ltd. (72) Inventor Katsuaki Ikema 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Inventor Kazumi Suzuki 6-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation Within

Claims (6)

[Claims] 1. A magnetic tape as an information recording medium pulled out from a tape reel on a supply side is wound around a rotary drum by a pair of tape pull-out guides on a drum inlet side and a drum outlet side via a tape guide of a mechanical tension regulator. In a recording / reproducing apparatus having a tape running system that is wound around a tape reel on the winding side via a tape guide on the winding side, spring tension is applied to the tension regulator in a direction to apply back tension to the tape of the tape running system. One end of the spring member is supported by the tension regulator arm,
The other end can be selectively locked to a plurality of locking portions provided in the spring tension adjusting mechanism and having different distances stepwise, and the spring tension adjusting mechanism is rotatable about a rotation fulcrum shaft, A tension regulator mechanism of a recording / reproducing apparatus, wherein the rotation fulcrum shaft is configured to be a point of application of spring tension of the spring member. 2. A tension regulator mechanism for a recording / reproducing apparatus according to claim 1, wherein the spring tension adjusting mechanism is provided with a stopper portion for restricting a rotation range with respect to the rotation fulcrum shaft. Tension regulator mechanism for recording / playback devices. 3. The tension regulator mechanism for a recording / reproducing apparatus according to claim 1, wherein a plurality of engaging portions of the spring tension adjusting mechanism are formed at equal intervals. Regulator mechanism. 4. The tension regulator mechanism of the recording / reproducing apparatus according to claim 1, wherein the rotation fulcrum shaft of the spring tension adjusting mechanism is supported by an operating member that rotates in association with an operation mode of the tape, and the operation mode is the same. A tension regulator mechanism of a recording / reproducing apparatus, wherein the spring tension of the spring member can be varied by moving the spring tension adjusting mechanism in accordance with the above. 5. The tension regulator mechanism of the recording / reproducing apparatus according to claim 1, wherein the tension regulator mechanism is a double tension regulator arranged also on the winding side of the magnetic tape. The tension regulator mechanism of the recording and reproducing device. 6. The tension regulator mechanism of the recording / reproducing apparatus according to claim 1, wherein the tension regulator mechanism is a video cassette recorder capable of using two or more kinds of tape cassettes having different sizes. A tension regulator mechanism for a recording / reproducing device, which is applied.