JP3109226B2 - Recording and playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel recording / reproducing apparatus. Specifically, two different sizes of tape cassettes having different distances between the supply-side tape reel and the winding-side tape reel, in which both ends of the recording medium tape are individually fastened and wound, respectively, can be mounted, In a recording / reproducing apparatus in which a supply reel unit engaged with at least the supply tape reel is moved at two positions, a tension applied to a recording medium tape caused by a difference in size of a tape cassette used by an inexpensive mechanism. It is an object of the present invention to provide a new recording / reproducing apparatus capable of reducing the difference between the two.

[0002]

2. Description of the Related Art It is possible to mount two different size tape cassettes in which both ends of a recording medium tape are individually fastened and wound, and the distance between a supply side tape reel and a winding side tape reel is different. There is a recording / reproducing apparatus in which a reel base engaged with a tape reel is moved at two positions.

In such a conventional recording / reproducing apparatus, each reel base is driven by a separate reel base motor, and the tension of the recording medium tape is controlled by controlling the voltage applied to each reel base motor. It was done by controlling.

[0004]

In the above-mentioned conventional recording / reproducing apparatus, it is necessary to provide separate reel stand motors for the supply side and the take-up side, respectively. There is a problem that the weight cannot be increased, and two heavy motors are required.

[0005] Further, the movement of the reel base in accordance with the tape cassette to be used must be performed for each of the considerably heavy reel base motors, and the members for supporting the reel base and the members for guiding the movement must withstand the weight. In this respect, cost and weight cannot be avoided.

[0006]

In order to solve the above-mentioned problems, a recording / reproducing apparatus according to the present invention is provided with a rotation of a tension regulator arm which is rotatably supported by a base and controls the tension of the recording medium tape. Both ends of the band member are supported separately at a position distant from the fulcrum and at a support portion provided on the base, and a portion supporting the both end portions of the band member, the intermediate portion of which is slidably contacted with a predetermined portion of the supply-side reel base. ,
It is positioned at a line symmetrical position with respect to a vertical bisector of a line connecting the centers of two positions of the supply-side reel table moving corresponding to two tape cassettes having different sizes.

[0007]

According to the recording / reproducing apparatus of the present invention, the tension of the recording medium tape is controlled by a mechanical mechanism including the tension regulator arm and the band member. It has the advantage of not being heavy.

A portion supporting both ends of the band member,
That is, the position of the support portion for the tension regulator arm and the position of the support portion for the base are perpendicular to each other by connecting the center of the two positions of the supply-side reel base moving corresponding to the two tape cassettes having different sizes. Since the tape cassette is located at a position symmetrical with respect to the branch line, a difference in tension applied to the recording medium tape caused by a difference in the size of the tape cassette used can be reduced.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

First, the outline of two large and small tape cassettes used in the recording / reproducing apparatus of the present invention will be described.

1 is a large tape cassette and 2 is its cassette case.

The cassette case 2 is in the form of a flat box having a horizontally-long rectangular shape when viewed from above, and tape outlets 3, 3 are formed at the left and right ends of the front surface thereof. A mouth part 4 opened forward and downward is formed therebetween.

In the cassette case 2, tape reels 6 and 6 'on which both ends of a magnetic tape 5 are fixed and wound are rotatably housed.
', Hubs 7, 7 are formed with reel base engaging holes 7a, 7a opened at the lower ends thereof.
“a” faces the outside through a reel base insertion hole (not shown) formed in the bottom wall of the cassette case 2.

A part of the magnetic tape 5 is led out of the cassette case 2 from the tape outlets 3 and 3 and is located along the front surface of the mouse unit 4.

In addition, a front lid for opening and closing the front surface of the magnetic tape 5 rotatably supported on the front surface of the cassette case 2 and extending along the front surface of the cassette case 2 is provided. , And their illustration and description are omitted.

Reference numeral 8 denotes a small tape cassette, and reference numeral 9 denotes a cassette case.

The cassette case 9 has a flat rectangular box shape which is considerably smaller than the cassette case 2 of the large tape cassette 1 when viewed from above.
The tape reels 13 and 13 'each having a magnetic tape 12 are housed therein. 14 and 14 are tape reels 13 and 1
3 'hubs, 14a, 14a are reel base engaging holes opened at the lower ends of the hubs 14, 14.
4a and 14a are tape reels 6 of the large tape cassette 1,
6 'has substantially the same size as the reel base engaging holes 7a, 7a.

Reference numeral 15 denotes a video tape recorder, which is a so-called compatible type which can use the above-mentioned two types of tape cassettes 1 and 8 of the large and small sizes.

Reference numerals 16 and 16 'denote reel base arms, the base ends of which are rotatably supported at positions slightly closer to the front side of a mechanical chassis 17 serving as a base, with a slight left and right distance therebetween. Reel stands 18, 18 'are rotatably supported at the rotating ends of the reel stand arms 16, 16'. 18
a and 18'a are reel engaging shafts protruding from the upper surfaces of the reel stands 18 and 18 '. Also, the supply-side reel base 18
A brake drum 18b is formed at the lower end of the.

The reel base arms 16, 16 'are rotated between the small cassette position shown in FIG. 2 and the large cassette position shown in FIG. When the small tape cassette 8 is located at the small cassette position, the distance between the axes of the reel stands 18 and 18 'is small.
The distance between the axes of the tape reels 13 and 13 'is equal to the distance between the axes of the tape reels 13 and 13'.
Is equal to the distance between the axes.

Reference numerals 19, 19 denote drawing arms, one end of which is rotatably supported by the mechanical chassis 17, and the drawing guides 20, 20 standing upright at the other end. And
Until the tape cassette 1 or 8 is mounted,
In the initial state, the magnetic tape 5 is located at an initial position indicated by a two-dot chain line in FIGS. 1 and 2, and when the magnetic tape 5 is pulled out of the cassette case 2 or 9 and wound around the head drum, the reel stand as shown in FIG. Arm 1
When the reels 6 and 16 'are at the small cassette position, they rotate to the first withdrawal position shown in the figure, and when the reel base arms 16, 16' are at the large cassette position as shown in FIG. To the second drawn position shown.

Reference numeral 21 denotes a head drum provided at a substantially central portion in the left-right direction on the back side of the mechanical chassis 17, has a fixed drum and a rotating drum, and a magnetic head (not shown) is supported on the rotating drum.

Reference numerals 22 and 22 denote tape loading blocks, each having loading guides 23 and 23 and inclined guides 24 and 24. The tape loading blocks 22 and 22 are moved along guide grooves 25 and 25 formed in the mechanical chassis 17, respectively. In the initial state, the head drum 21 is located at an initial position indicated by a two-dot chain line in FIGS. 1 and 2, and is moved to a loading completion position located slightly deeper on both sides of the head drum 21 during tape loading.

Reference numeral 26 denotes a capstan, which is rotated by a capstan motor 27 and protrudes above the mechanical chassis 17 at a position slightly separated to the right of the head drum 21.

Reference numeral 28 denotes a pinch roller arm whose base end is rotatably supported at a position slightly closer to the right side than the center of the mechanical chassis 17. A pinch roller 29 is rotatably supported at the rotation end.
In the initial state, the pinch roller arm 28 is located at an initial position shown by a two-dot chain line in FIGS.
When reproduction or recording is performed, the pinch roller 29 is moved to the crimping position where the pinch roller 29 is crimped to the capstan 26 via the magnetic tape 5 or 12 as shown by a solid line in FIG.

Reference numeral 30 denotes a tension regulator arm, which is rotatably supported at a position slightly closer to the other end than one end to a position closer to the left, which is slightly deeper than the center of the mechanical chassis 17. A tension pin 31 is provided upright at the other end of the tension regulator arm 30.

In the initial state, the tension regulator arm 30 is locked at a standby position extending substantially straight in the front-rear direction. The lock is released at the time of operation during reproduction or recording, and is released by a resilient means (not shown). The magnetic tape 5 or 12 is rotated from the outside in a clockwise direction as viewed from above by the moving force urged against the magnetic tape 5 or 12 so as to elastically contact the portion between the left pull-out guide 20 and the loading guide 23 from the outside. Become.

Reference numeral 32 denotes a band-like brake band.
One end is supported by a support 33 near the left end of the center of the mechanical chassis 17, and the other end is supported by a support 34 at one end of the tension regulator arm 30. The middle part of the brake band 32 is wound around the brake drum 18b of the reel base 18 on the supply side.

The positional relationship between the two support portions 33 and 34 supporting both ends of the brake band 32 is as follows.

That is, as shown in FIG. 3, a vertical bisector C of a line segment AB connecting the center A of the reel base 18 at the small cassette position and the center B of the reel base 18 at the large cassette position.
The support portions 33 and 34 are located at positions substantially symmetrical with respect to.

When the tape cassette 1 or 8 is mounted at the cassette mounting position of the video tape recorder 15, the pull-out guides 20, 20, the loading guides 23, 23, the inclined guides 24, 24, the pinch rollers 29 at the initial positions. Is the mouse part 4 or 1 of the tape cassette 1 or 8
1 relatively. When the large tape cassette 1 is mounted, the reel base 18 at the large cassette position,
The reel engaging shafts 18a, 18'a of 18 'are engaged with the reel stand engaging holes 7a, 7a of the tape reels 6, 6', and when the small tape cassette 8 is mounted, the reel stand at the small cassette position. 18, 18 'reel engaging shafts 18a, 18'
a is the reel base engaging hole 14 of the tape reel 13, 13 '.
a, 14a.

Then, the tape loading block 2
2 and 22 are moved to the loading completion position. When the pull-out guides 20 and 20 are the large tape cassette 1, they move to the second position shown in FIG.
The magnetic tape 5 or 12 is moved through a predetermined tape path. When reproduction or recording is performed, the pinch roller 29 is pressed against the capstan 26 with the magnetic tape 5 or 12 interposed therebetween, the lock of the tension regulator arm 30 to the standby position is released, and the ten leg pin 31 is moved to the magnetic tape 5.
Or it is elastically contacted with 12 from the outside.

When the tension of the magnetic tape 5 or 12 on the supply side from the head drum 21 becomes smaller, the tension regulator arm 30 rotates clockwise as viewed from above, and its one end 34 (supporting portion of the brake band 32). Moves away from the reel base 18,
The brake band 32 is the brake drum 1 on the reel base 18.
8b, so that the magnetic tape 5 or 12
Tension is increased.

When the tension of the magnetic tape 5 or 12 on the supply side from the head drum 21 increases, the tension regulator arm 30 rotates counterclockwise as viewed from above, and the one end 34 approaches the reel base 18. , The tightening of the brake band 32 with respect to the brake drum 18b of the reel base 18 is weakened, whereby the tension of the magnetic tape 5 or 12 is reduced.

Since the support portions 33 and 34 at both ends of the brake band 32 are provided at the positions described above, when the large tape cassette 1 is used and when the small tape cassette 8 is used.
When using the brake drum 18 of the brake band 32
There is almost no difference in the wrap angle with respect to b, so that the difference in tension applied to the magnetic tapes 5 and 8 can be reduced.

[0036]

As is apparent from the above description, the recording / reproducing apparatus of the present invention comprises a supply-side tape reel and a take-up side tape reel in which both ends of a recording medium tape are fixed and wound respectively. The tape cassettes of two different sizes, each having a different interval between the tape cassettes, can be mounted.
A recording / reproducing device which moves at one of two positions,
Both ends are separately supported at a position separated from a rotation fulcrum of a tension regulator arm rotatably supported by the base and performing tension control of the recording medium tape, and at a support portion provided on the base, and an intermediate portion is provided. The line supporting the both ends of the band member slidably in contact with the predetermined portion of the supply-side reel base is connected to a vertical bisector of a line connecting the centers of the two positions of the supply-side reel base. It is characterized by being located at a symmetrical position.

Therefore, in the recording / reproducing apparatus of the present invention,
Since the tension of the recording medium tape is controlled by a mechanical mechanism including the tension regulator arm and the band member, the recording medium tape can be configured at a low cost and has an advantage that the weight is not increased.

A portion supporting both ends of the band member,
That is, the position of the support portion for the tension regulator arm and the position of the support portion for the base are perpendicular to each other by connecting the center of the two positions of the supply-side reel base moving corresponding to the two tape cassettes having different sizes. Since the tape cassette is located at a position symmetrical with respect to the branch line, a difference in tension applied to the recording medium tape caused by a difference in the size of the tape cassette used can be reduced.

It should be noted that the specific shapes and structures shown in the above embodiments are merely examples for embodying the present invention, and the technical scope of the present invention is interpreted in a limited manner. It is not what is done.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a recording / reproducing apparatus according to an embodiment of the present invention, with a large tape cassette mounted and a part thereof cut away.

FIG. 2 is a plan view showing a small tape cassette with a part thereof cut away in a mounted state.

FIG. 3 is an enlarged plan view of a main part for explaining positions of support portions at both ends of a band member.

[Explanation of symbols]

Reference Signs List 1 tape cassette 5 recording medium tape 6 supply side tape reel 6 'take-up side tape reel 8 tape cassette 12 recording medium tape 13 supply side tape reel 13' take-up side tape reel 15 recording / reproducing device 17 base 18 supply side reel stand 18b Predetermined portion of supply-side reel base 30 Tension regulator arm 32 Band member 33 Base-side support at end of band member 34 Tension regulator arm-side support at end of band member A Supply-side reel base at one position B The center of the supply reel unit at the other position AB The line segment connecting the centers A and B of the two positions of the supply reel unit C The vertical bisector of the line segment AB

Claims (1)

(57) [Claims] 1. A tape cassette of two different sizes, in which both ends of a recording medium tape are individually fastened and wound, and a distance between a supply-side tape reel and a take-up tape reel, respectively, is different. A recording / reproducing apparatus in which at least a supply reel unit engaged with the supply tape reel is moved at two positions, the recording / reproducing apparatus being rotatably supported by a base and controlling the tension of the recording medium tape. The two ends of the band member are supported separately at a position separated from the pivot point of the tension regulator arm and a support portion provided on the base, and an intermediate portion slides on a predetermined portion of the supply-side reel base. A recording / reproducing apparatus characterized in that the portions supporting both ends are located at positions symmetrical with respect to a vertical bisector of a line connecting the centers of the two positions on the supply reel base. Raw equipment.