JP3518154B2 - Tension regulator mechanism of recording / reproducing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of moving a gap between a pair of reel bases on which a supply-side tape reel wound with a magnetic tape as an information recording medium and a winding-side tape reel are mounted by a reel base moving mechanism. In addition, the present invention relates to a recording / reproducing apparatus suitable for use in a so-called compatible type consumer VCR (video cassette recorder) in which two kinds of tape cassettes having different sizes can be selectively mounted on a reel stand, and particularly, The present invention relates to a tension regulator mechanism for controlling the rotation of the reel base by the braking action of the tension regulator band that is applied to the reel base by applying the tape tension of the magnetic tape pulled out from the tape reel.

[0002]

2. Description of the Related Art Conventionally, in a tension regulator mechanism of a recording / reproducing apparatus, one end of a tension regulator band is fixed to a tension regulator arm via a supporting member, and the other end of the band is attached to a mechanical chassis via a supporting member. It is fixed so that it cannot rotate. Further, the length of the tension regulator band is adjusted, for example, by sliding a band adjusting portion provided on a support member on the mechanical chassis side, and after the band adjustment, the position is fixed with a screw.

[0003]

In the structure of the tension regulator band as described above, when the reel stand moves to two positions corresponding to tape cassettes of different sizes, the tension of the band stretched over the reel stand is tensioned. Since the condition changes, the position of the tension regulator arm moves, which causes a problem that the tape tension greatly changes at the moving positions of the two reel stands. Moreover, since one end of the tension regulator band is fixed so as not to rotate, repeated bending force acts on the connecting portion between the support member and the band as the reel base moves to two positions. There is also the problem that the band will break.

Further, in this type of tension regulator mechanism, since the tension regulator arm pivotally moves toward the reel stand side during the tape unloading operation, the tension regulator band is loosened with respect to the reel stand. For example, if the recording / reproducing apparatus is turned upside down in this state, the tension regulator band may drop off from the band brake surface of the reel stand. Therefore, in the conventional tension regulator mechanism, the reel stand is provided with a band drop prevention member.

The present invention has been made to solve the above-mentioned problems, and the position of the tension regulator arm can be moved even if the reel base is moved to two positions corresponding to tape cassettes of different sizes. The present invention aims to obtain a tension regulator mechanism for a recording / reproducing apparatus in which the tension regulator band does not break and the tension regulator band does not loosen from the reel base even when the tension regulator arm moves to the unloading position. To do.

[0006]

To achieve the above object, according to an aspect of, Te' Deployment regulator mechanism of the recording and reproducing apparatus according to the present invention, both the band edge of the tension regulator band acting brake in friction contact to re Lumpur stand A tension regulator mechanism of a recording / reproducing apparatus, which is rotatably supported by a tension regulator arm and a mechanical chassis around a rotation fulcrum portion via a supporting member, and has a tension adjusting band length adjusting mechanism on one supporting member. At, the reel stand is in the position corresponding to the large tape cassette.
There is a tension regulator arm in the loading position
Position from the stand to the unloading position, the tension
Tension regulator
The support member of the band is rotated in the separating direction from the reel stand,
Tension regulator A mechanism to remove the slack in the band
Characterized by comprising a.

With this structure, the reel stand is large.
Adjust the tension regulator at the tape cassette position.
System moves from the loading position to the unloading position.
When made, remove tension regulator band slack
It is possible to prevent the band from falling off the reel stand.
Wear.

Further, the rotation fulcrums of both the supporting members of the tension regulator band are on the parallel line segment connecting the centers of the respective movement positions of the reel stand, and from the perpendicular bisector of the line segment. Since they are arranged at equal intervals, the position of the tension regulator arm does not change even when the reel stand is moved to a position corresponding to a tape cassette having a different size. Good tape tension can be obtained even when used.

Further, an operating piece is provided on a part of a supporting member which is rotatably supported on the mechanical chassis, and is brought into contact with the operating piece when the tension regulator arm is moved to the unloading position, and the tension regulator band is attached to the reel base. By rotating the support member in the direction in which the tension is loosened, the tension regulator band can be wound around the reel stand during unloading and the band can be prevented from falling off.

Further, in the tension regulator band length adjusting mechanism, the first supporting member having the above-mentioned rotation fulcrum portion and the second supporting member to which the tension regulator band is attached are connected by the rotating shaft portion having the eccentric shaft. With this configuration, by rotating the rotary shaft portion with a tool or the like, the rotary shaft portion eccentrically rotates about the eccentric shaft, and the second support member slides with respect to the first support member. It is possible to adjust the length of the tension regulator band.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a tension regulator mechanism of a recording / reproducing apparatus according to the present invention will be described below with a compatible type video cassette recorder for consumer use (hereinafter referred to as V
It will be described with reference to the drawings by taking as an example a case where the tension regulator mechanism is a double tension regulator system.

FIG. 1 is a plan view showing a main part of a VCR device according to this embodiment when a small tape cassette 4A is mounted,
FIG. 2 is a plan view of the same when the large tape cassette 4B is mounted.

First, referring to FIG. 1, a small tape cassette 4
The tape running system of the VCR device will be described with reference to the case A.

Reference numerals 1 and 2 are a pair of supply side reel base and take-up side reel base arranged on the mechanical chassis 3.
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.

The magnetic tape T drawn from the tape supply side reel 5 of the small tape cassette 4A is guided by the guide roller 7
Vertical guide 1 supported by the tape guide 9 and the slide member 10 of the tension regulator arm 8 on the feed side
1 and the tilt guide 12 and is helically wound from the entrance side of the rotary drum 13 having a magnetic head, and the magnetic tape T is pulled out from the exit side of the rotary drum 13 and supported by the slide member 14 and the tilt guide 15 and the vertical direction. Guide 16, capstan 17 and pinch roller 1
And a tape guide system of a tension regulator arm 19 on the take-up side via a guide roller 21 to be wound around a reel 6 on the tape take-up side.

Here, 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. Both slide members 10 and 14 are positioned on the fixed blocks 23 and 24 at the loading position of FIG.

Further, the reel bases 1 and 2 are fulcrum shafts 2, respectively.
Reel stand holding member 2 that rotates about 5, 26 as a fulcrum
It is rotatably supported by reel base support shafts 29 and 30 which are erected from 7 and 28. Therefore, the reel bases 1 and 2 are moved and positioned by the rotation operation of the reel base holding members 27 and 28 to the positions where the reel base spacings correspond to the small tape cassette 4A and the large tape cassette 4B. There is.

Tension regulator arm 8 on the supply side
Is rotatable about a fulcrum shaft 31 as a fulcrum, and is urged by a coil spring 32 in a direction to increase the tension of the magnetic tape T stretched over the tape guide 9.

The tension regulator arm 19 on the take-up side is also rotatable about a fulcrum shaft 33 as a fulcrum, and is biased by a coil spring 34 in a direction to increase the tension of the magnetic tape T hung on the tape guide 20. is doing.

The tension regulator mechanism is provided with tension regulator band mechanisms 35 and 36 which are essential parts of the present invention for frictionally contacting the reel bases 1 and 2 to obtain a braking action. Since the tension regulator band mechanisms 35 and 36 have the same configuration, the tension regulator band mechanism 35 on the reel stand 1 side
Will be described with reference to FIGS. 3 and 4.

In FIG. 3, the reel stand 1 has a large tape cassette 4B.
4 is an operating position of the tension regulator band mechanism 35 when it is positioned at a position corresponding to, and FIG. 4 is a tension regulator band mechanism 35 when the reel base 1 is positioned at a position corresponding to the small tape cassette 4A.
Is the operating position of.

In the band portion of the tension regulator band mechanism 35, a felt material 38 is attached to the back surface of a band 37 formed of a thin strip of copper or the like, and the felt material 38 is stretched over a rotating surface (not shown) of the reel stand 1 to cause friction. Brake action by contact.

One end 37a of the band 37 is provided with a support member 39.
The support member 39 is rotatably supported by a shaft pin 40 near the fulcrum shaft 31 of the tension regulator arm 8 by being caulked and fixed to the band mounting portion 39a.

The other end portion 37b of the band 37 is fixed to the band mounting portion 42a of the second supporting member 42, which is composed of the first supporting member 41 and the second supporting member 42, by crimping. Then, the first support member 41 is rotatably supported by inserting the bearing portion 44 into the shaft pin 43 provided upright from the mechanical chassis 3, and the first support member 41 is supported by the support hole 44a of the bearing portion 44 (see FIG. 5). (Refer to FIG. 4), the engaging piece 44b provided on the shaft pin 43
To prevent it from coming off.

The above-mentioned first and second support members 41, 4
2 are connected by a length adjusting mechanism 45 of the band 37. The length adjusting mechanism 45 has a structure as shown in FIG.

That is, the shaft hole 4 is formed in the second support member 42.
6, the rotary shaft body 47 is rotatably inserted into the shaft hole 46 so that a predetermined friction is generated. This rotating shaft 4
A rotation operation groove 48 into which a tool such as a screwdriver is inserted is formed on the upper surface of 7, and an eccentric shaft 49 is provided at the bottom of the rotation shaft body 47 at a position eccentric from the center thereof. The eccentric shaft 49 is supported by a shaft hole 50 formed in the first support member 41. Further, the guide hole 51 formed in the second support member 42 is engaged with the guide pin 52 provided in the first support member 41. An operating portion 53 is formed at the end of the first support member 41 on the bearing portion 44 side.

The operation of the length adjusting mechanism 45 constructed as described above will be described with reference to FIG. 6. In FIG. 6A, the second supporting member 42 is moved to a position where the second supporting member 42 is most protruded from the first supporting member 41. There is. That is, the band 37 is in the most pulled out state. The protruding length of the second support member 42 is a distance L from the center of the eccentric shaft 49 to the tip of the band attachment portion 42a of the support member 42, and the distance L is the rotational angular position of the rotary shaft body 47. Can be adjusted by.

That is, in FIG. 6A, the long diameter portion S ₀ having the longest distance from the center of the eccentric shaft 49 to the outer periphery of the rotary shaft body 47 is located on the protruding side of the second support member 42.
The second support member 42 is projected to the maximum.

Therefore, when the rotary shaft body 37 is rotated by 45 ° in the direction of the arrow from the position of FIG. 6A, on the protruding side of the second support member 42, as shown in FIG. 6B, the rotary shaft body is rotated from the center of the eccentric shaft 49. When the distance to the outer circumference of 47 is S ₁ and the rotary shaft body 37 is further rotated by 45 °, the rotary shaft body 47 is moved from the center of the eccentric shaft 49 to the protruding side of the second support member 42 as shown in FIG. 6C. The shortest distance S ₂ to the outer circumference. Therefore, the second support member 42 moves to the most retracted position, and the band 37 becomes the shortest. With such a configuration, the length of the band 37 wound around the reel base 1 can be freely adjusted by appropriately rotating the rotating shaft body 47.

In the band length adjusting mechanism thus constructed, the rotary shaft body 47 is inserted into the shaft hole 46 of the second support member 42 so as to generate a certain amount of friction. Since the rotary shaft body 47 is fixed at a rotation position where the band is adjusted by rotating 47, it is not necessary to fix the band with screws after adjusting the band as in the conventional case. The band can be easily adjusted.

Now, in the tension regulator mechanism constructed as described above, the reel base 1 moves from the position corresponding to the large tape cassette 4B shown in FIG. 3 to the position corresponding to the small tape cassette 4A shown in FIG. Along with the movement of the band 37, the support member 39 that fixes the band end portion 37a on one end side rotates about the shaft pin 40 along with the movement of the band 37, and also fixes the band end portion 37b on the other end side of the band 37. The first support member 41 that is rotating rotates about the shaft pin 43.

With this configuration, both band ends 37a, 37a of the band 37 are moved as the reel base 1 moves between the large tape cassette corresponding position and the small tape cassette corresponding position.
The support members 39 and 41 supporting 37b are the shaft pins 4
Since it rotates in the moving direction of the reel base about 0 and 43, the bending force of the band 37 is not generated in the connecting portion between the supporting member and the band, and the band 37 can be prevented from being broken.

FIG. 7 shows a state in which the reel stand 1 described above is moved from the corresponding position of the large tape cassette 4B shown by the solid line to the corresponding position of the small tape cassette 4A shown by the phantom line. Moving position of stand 1 and band 37
The relationship with the axis pins 40 and 43, which are the rotation fulcrum axes, is that on the line segment P ₂ parallel to the line segment P ₁ connecting the centers of the respective movement positions of the reel stand 1, the line segment P ₂ is perpendicular to the line segment P ₂ . The shaft pins 40 and 43 are arranged at equal intervals from the bisector P.

With this structure, the positions of the tension regulator arm 8 and the tape guide 9 will change even if the reel base 1 moves to two positions, a large tape cassette corresponding position and a small tape cassette corresponding position. As a result, the tape tension in the loading state pulled out from the selectively loaded large and small tape cassettes can be brought into a stable state without abrupt change.

FIG. 8 shows the effective operation of the present invention of the tension regulator band mechanism when the reel base 1 is at the position corresponding to a large tape cassette and the tension regulator arm 8 is moved from the loading position to the unloading position. Is.

That is, when the tension regulator arm 8 starts moving from the loading position shown by the solid line in the unloading direction, the band 37 starts to loosen from the reel base 1. By the tension regulator arm 8 is further moved to the unloading direction, but is not shown increases the looseness of the band 37 here, the tension regulator arm 8 is moved to immediately before the unloading completion position, the edge 8a of the arm 8 Collides with the operating piece 53 of the first support member 41. Thus, by rotating the slack eliminating direction of bands the shaft pin 43 as a rotation center as the actuating piece 53 is indicated by the second supporting member 42 is the imaginary line together with the first supporting member 41 becomes the point it can be, can be brought into contact with the band 37 to the reel stand 1. Therefore, even if the tension regulator arm 8 flips the VCR device upside down at the unloading position, the band 37 can be prevented from falling off the reel base 1.

When the reel base 1 moves from the loading operation position to the unloading position at the small tape cassette corresponding position as shown in FIG. 4, the positions of the reel base 1 and the tension regulator arm 8 will be described. Due to the relationship, the band 37 hardly loosens, and therefore, in this case, the band loosening operation is not always necessary.

In the above-described embodiment, the tension regulator band mechanism 35 on the reel base 1 side which is the tape supply side has been described, but the tension regulator band mechanism 36 of the reel base 2 which is the tape winding side is of course the same as the above case. It is possible to obtain various effects.

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-described embodiment, the case where the adjusting mechanism 45 for adjusting the band length of the tension regulator mechanism is provided on the supporting member side which is rotatable on the mechanical chassis 3 has been described. A band length adjusting mechanism may be provided on the support member 39 side.

In the VCR device shown in the embodiment, the double tension regulator mechanism has been described, but the present invention can be widely applied to a VCR device having a tension regulator mechanism only at least on the tape supply side.

Further, according to the present invention, a compatible type V cassette capable of using two types of tape cassettes of different sizes, large and small.
Although the CR device has been described, it is needless to say that the present invention can be applied even when two or more different size tape cassettes can be used, and in addition to the VCR device, a general VTR device or audio device using a magnetic tape. It can be widely applied to a tension regulator mechanism of a recording / reproducing device such as a device.

[0043]

As described above, the tension regulator mechanism of the recording / reproducing apparatus according to the present invention has a large reel stand.
Tension regulation at the position corresponding to the tape cassette
From the loading position to the unloading position
The tension regulator arm,
The support member of the tension regulator band is the reel stand.
From the tension regulator van
The reel stand is equipped with a mechanism that removes slack.
Tension regulator at large tape cassette position
Arm moves from loading position to unloading position
When operating, tension regulator band slack removal
To prevent the band from falling off the reel stand.
There is an effect that you can.

Further, the rotation fulcrums of both the supporting members of the tension regulator band are on the parallel line segment connecting the centers of the respective moving positions of the reel stand, and from the perpendicular bisector of the line segment. Since they are arranged at equal intervals, the position of the tension regulator arm does not change even when the reel stand is moved to a position corresponding to a tape cassette of a different size, and the large and small tapes that are selectively mounted are not changed. The tape tension in the loading state, which is pulled out from the cassette, can be kept stable without abrupt change.

Further, an operating piece is provided on a part of a supporting member rotatably supported on the mechanical chassis, and is brought into contact with the operating piece when the tension regulator arm is moved to the unloading position, and the tension regulator band is attached to the reel base. By rotating the support member in the direction of slackening, the tension regulator band can be wound around the reel stand without slacking during unloading, and even if the recording / reproducing device is turned upside down. Even if there is, it is possible to prevent the band from falling off the reel stand.

Further, in the tension regulator band length adjusting mechanism, the first support member having the rotation fulcrum portion and the second support member to which the tension regulator band is attached are connected by the rotary shaft portion having the eccentric shaft. With the configuration, it is not necessary to fix with a set screw after adjusting the band, and the band can be locked after being adjusted by rotating the rotating shaft part with a tool etc., so the operability of band adjustment is improved. can do.

[Brief description of drawings]

FIG. 1 is a plan view of a tape running system corresponding to a small tape cassette equipped with a tension regulator mechanism according to the present invention.

FIG. 2 is a plan view of a tape running system that is also compatible with a large tape cassette.

FIG. 3 is an operation diagram of a position of the tension regulator mechanism corresponding to a large tape cassette.

FIG. 4 is an operation diagram of a position corresponding to a small tape cassette.

FIG. 5 is a perspective view of a support member having a band length adjusting mechanism in a separated state.

FIG. 6A is an operation diagram of the band length adjusting mechanism in a state where the band is most pulled out. B is an operation diagram of the band length adjusting mechanism in a state where the band is adjusted to a predetermined length. FIG. 6C is an operation diagram of the band length adjustment mechanism in a state where the band is the shortest.

FIG. 7 is an explanatory diagram of a positional relationship between a moving position of a reel base and a rotation fulcrum shaft of a band.

FIG. 8 is an explanatory view of the slack eliminating operation of the band at the unloading position of the tension regulator arm.

[Explanation of symbols] 1, 2 reel stand, 4A small tape cassette, 4B large tape cassette, 8, 19 tension regulator arm, 9, 20 tape guide, 35, 36 tension regulator band mechanism, 37 band, 39 support member, 40 , 43 axis pin, 41 first support member, 42
Second support member, 45 Band length adjusting mechanism, 46
Shaft hole, 47 rotary shaft body, 48 rotary operation groove, 49 eccentric shaft, 50 shaft hole, 51 guide hole, 52 guide pin,
53 Working piece, T magnetic tape

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masatake Takase 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Akihiro Uetake 6-35 Kita-Shinagawa, Shinagawa-ku, Tokyo No. Sony Corporation (72) Inventor Katsuaki Ikema 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Inventor Kazuyoshi Suzuki 6-35 Kita-Shinagawa, Shinagawa-ku, Tokyo So Knee Co., Ltd. (56) Reference JP-A-7-44943 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G11B 15/43

Claims (4)

(57) [Claims] 1. An interval between a pair of reel stands on which a supply-side tape reel wound with a magnetic tape as an information recording medium and a take-up side tape reel are inserted is made movable by a reel stand moving mechanism, and the reel stand is provided. Large tape cassette and small TE
Is a tension regulator mechanism of a recording / reproducing apparatus for controlling the tape tension of at least the magnetic tape pulled out from the supply tape reel. In the tension regulator mechanism, both band ends of the tension regulator band that makes frictional contact with the reel base and acts as a brake can be rotated about the rotation fulcrum by the tension regulator arm and the mechanical chassis through the support member. In a tension regulator mechanism of a recording / reproducing apparatus having a tension regulator band length adjusting mechanism supported on one of the support members, the reel base is at a position corresponding to a large tape cassette.
Tension regulator arm from loading position
When operating in the unloading position, the above tension
The above tension regulation by the regulator arm
The support member of the tab band rotates in the direction away from the reel stand.
To remove the tension regulator band
The tension regulator mechanism of the recording / reproducing apparatus, which is characterized by including the mechanism described below. 2. The tension regulator mechanism of the recording / reproducing apparatus according to claim 1, wherein a rotation fulcrum portion of both of the support members of the tension regulator band connects a center of each moving position of the reel stand. A tension regulator mechanism for a recording / reproducing apparatus, wherein the tension regulator mechanism is arranged on a parallel line segment at equal intervals from a perpendicular bisector of the line segment. 3. The tension regulator mechanism for a recording / reproducing apparatus according to claim 1, wherein a part of a supporting member rotatably supported by the mechanical chassis is provided with an operating piece, and the tension regulator arm is provided at an unloading position. During operation, the edge of the arm is brought into contact with the operating piece, and the supporting member is separated from the reel base.
The tension regulator band
A tension regulator mechanism for a recording / reproducing apparatus, which is characterized in that slack is removed . 4. The tension regulator mechanism of the recording / reproducing apparatus according to claim 1, wherein the tension regulator band length adjusting mechanism comprises :
A first support member having the rotation fulcrum portion, and a second support member to which the tension regulator band is attached
There tension regulator mechanism of the recording and reproducing apparatus, characterized in that it is attached in rotation shaft having an eccentric shaft.