JP3208987B2 - Tape drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape drive for use in a tape recorder, a VTR, etc., which performs recording and reproduction using a tape medium.

[0002]

2. Description of the Related Art In recent years, there has been a strong demand for tape recorders, camera-integrated VTRs, and the like to be able to be used for a long time by reducing power consumption, and to reduce the size and weight of the apparatus main body.・ Power saving is an important factor.

[0003] A conventional tape drive will be described below. FIG. 7 is a sectional view of a main part of a tape drive used in a conventional camera-integrated VTR and the like.

In FIG. 7, 1 is a capstan that is driven to rotate, 2 is an outer peripheral portion of a pinch roller formed of a rubber member, 3 is an intermediate member that supports the outer peripheral portion 2 from an inner surface,
Reference numeral 4 denotes a support shaft of the pinch roller, 5 denotes a bearing portion that enables the intermediate member 3 to rotate about the support shaft 4, 6 denotes a ball bearing, and 7 denotes a sleeve for preventing the bearing portion 5 from coming off, and is press-fitted into the intermediate member 3. Have been. Reference numeral 8 denotes a tape-shaped medium used for recording and reproduction.

[0005] The operation of the conventional tape drive device configured as described above will be described.

[0006] The tape-shaped medium 8 is transferred at a predetermined speed by the capstan 1 driven to rotate and the outer peripheral portion 2 of a pinch roller pressed against the capstan 1 via the tape-shaped medium 8.

A ball bearing 6 is used for the bearing portion 5 in order to smoothly rotate the pinch roller.

In order for the tape-shaped medium 8 to run stably, the outer peripheral portion 2 must be uniformly pressed against the capstan 1, but the support shaft 4 is slightly inclined with respect to the capstan 1 in manufacturing. Therefore, it is difficult to make the support shaft 4 and the capstan 1 completely parallel.

Therefore, in the above-mentioned conventional tape drive,
Outer peripheral part 2 using slight play of ball bearing 6
Is slightly inclined with respect to the support shaft 4 so that the outer peripheral portion 2 and the capstan 1 are parallel to each other, and the outer peripheral portion 2 is evenly pressed to ensure stable running of the tape medium 8.

However, in the case where the outer peripheral portion 2 is formed of rubber as in the prior art, when the outer peripheral portion 2 is pressed against the capstan 1, the deformation loss of the rubber increases, and the tape driving force decreases due to an increase in the pinch roller load. , And Capstan 1
There is a problem that the torque and power consumption of the motor for rotating the motor increase. Further, since the pinch roller requires an intermediate member 3 for holding rubber between the pinch roller bearing portion 5 and the pinch roller outer peripheral portion 2, it is difficult to reduce the size and weight of the pinch roller, and consequently magnetic recording. There is also a problem in that the size and weight of the playback device are hindered.

Further, rubber is apt to deteriorate, and the tape is not normally transferred due to the deterioration of the rubber due to long-term use. In addition, since the rubber is difficult to process, the manufacture of a tape drive device is also difficult. There was a problem that became difficult.

Further, the above-described conventional tape driving device utilizes slight play of the bearing portion 5 and the ball bearing 6 in order to uniformly press the outer peripheral portion 2 of the pinch roller against the capstan 1. According to the method, the support shaft 4
The angle of inclination of the outer peripheral portion 2 with respect to the outer peripheral portion 2 is small, it is difficult to keep the outer peripheral portion 2 and the capstan 1 completely parallel, and the use of the ball bearing 6 requires a complicated structure, a large number of parts, and a manufacturing and cost aspect. Was not preferred.

In view of the above, it is possible to eliminate a decrease in tape driving force due to rubber deformation loss and an increase in power consumption due to a torque load of a capstan motor in the above-described conventional tape driving device, and to realize a simple structure with the outer peripheral portion 2 and the capstan 1. Has been disclosed in Japanese Patent Application Laid-Open No. 5-159419.

The construction of the tape drive disclosed in Japanese Patent Application Laid-Open No. 5-159419 will be described below.

FIG. 8 is a sectional view of a main part of the tape drive. In FIG. 8, reference numeral 4 denotes a support shaft of the pinch roller, and reference numeral 10 denotes a bearing portion 10a and an outer peripheral portion 1 of the pinch roller made of a rigid synthetic resin member having a higher hardness than rubber.
Reference numeral 0b denotes a rigid synthetic resin member of a pinch roller integrally molded, and 9 denotes a retaining member for the base 10.

The operation of the tape drive configured as described above will be described. The rigid synthetic resin member 10 is rotatable about the support shaft 4, and transfers the tape-shaped medium by being pressed against the capstan via the tape-shaped medium.

The outer peripheral portion 10b of the pinch roller which is in direct contact with the tape-shaped medium when the tape-shaped medium is transferred is formed of a rigid synthetic resin having a higher hardness than a rubber member. Since the deformation of the outer peripheral portion 10b is small and the pinch roller load can be reduced, the tape driving force can be improved and the power consumption of the motor for rotating the capstan can be reduced.

In the known tape driving device shown in FIG. 8, the inner diameter of the bearing portion 10a of the rigid synthetic resin member 10 is pinched so that the outer periphery 10b of the pinch roller and the capstan are kept parallel and the tape runs stably. Since the outer diameter of the pinch roller is configured to be slightly larger than the outer diameter of the support shaft 4 of the roller and the gap between the rollers allows the outer periphery 10b of the pinch roller to be inclined with respect to the support shaft 4, the outer periphery 10
The inclination angle of b is large, stable running of the tape can be achieved with a simple structure, and the bearing 10a is integrally formed with the outer peripheral portion 10b, thereby facilitating the manufacture and making the pinch roller compact and lightweight. Things.

[0019]

SUMMARY OF THE INVENTION However, Japanese Patent Application Laid-Open No.
The tape drive disclosed in Japanese Patent No. 59419 still has the following problems in spite of the above-mentioned various advantages not provided by the conventional tape drive.

That is, in the above-mentioned tape drive device, the bearing 1 of the pinch roller is made of a rigid synthetic resin material having high hardness.
0a and the outer peripheral portion 10b are integrally formed, but the rigid synthetic resin material is such that the bearing portion 10a withstands friction with the support shaft 4 of the pinch roller and can rotate the pinch roller smoothly. Therefore, it is necessary to use a synthetic resin having a considerable hardness.

However, if a synthetic resin having an unnecessarily high hardness is used for the outer peripheral portion 10b, the frictional force due to the pressure contact with the capstan is reduced, and the tape-shaped medium is not transported smoothly, so that the tape can run stably. There is no problem.

In the above-mentioned tape drive device, the bearing portion of the pinch roller is made of a rigid synthetic resin material instead of the conventional ball bearing, and the inner diameter of the bearing portion 10a is slightly larger than the outer diameter of the support shaft 4 of the pinch roller. Forming and utilizing the gap between the bearing portion 10a and the support shaft 4,
The outer peripheral portion 10b of the pinch roller and the capstan driven to rotate are kept parallel to ensure stable running of the tape-shaped medium.

However, in the cylindrical bearing portion 10a, the contact point between the bearing portion 10a and the support shaft 4 becomes the upper end or the lower end of the bearing portion 10a depending on the direction of the inclination of the support shaft 4, so that the contact is uneven and pinch. There is a problem that the roller does not rotate smoothly, and consequently the tape-shaped medium is not smoothly transferred.

The present invention has been made to solve the above problems, and
An object of the present invention is to provide a tape drive device capable of stably running a tape-shaped medium while reducing the driving load of the tape-shaped medium.

[0025]

According to the present invention, there is provided a tape driving apparatus comprising: a capstan driving unit;
The cap rotated by the capstan driving means
A tape and a tape-shaped medium pressed against the capstan
And a pinch roller for transferring the
The bearing is composed of a support shaft, a bearing for receiving the support shaft,
Molded integrally with the receiving part using rigid synthetic resin material
At the upper end and lower end outside the base.
Elastic synthetic resin having a lower hardness than the rigid synthetic resin material
And an outer peripheral portion made of a fatty material, for transferring the tape-shaped medium.
When feeding, the upper and lower ends of the pinch roller and the front
The base body presses against the capstan and at least
The recording body is connected to the capstan via the tape medium.
Pressure.

[0026]

[0027]

[0028]

DETAILED DESCRIPTION OF THE INVENTION The present invention the above configuration, the pressure through the tape-shaped medium the capstan being rotated, the upper and lower ends of the outer peripheral portion of the pinch roller to transport the tape-like medium
Since the portion is formed of an elastic synthetic resin material, the amount of deformation when pressed by the capstan is smaller than when formed of rubber, and the load on the pinch roller can be reduced due to the deformation loss of the outer peripheral portion, and consequently the capstan Can be reduced in torque of a motor that rotationally drives the motor.

Also, the inner diameter of the bearing portion of the pinch roller,
Due to the gap provided between the outer diameter of the pinch roller and the outer diameter of the pinch roller, the outer peripheral portion of the pinch roller can be freely tilted with respect to the support shaft. Even when the tape is inclined, the outer peripheral portion is always kept parallel to the capstan, and is always pressed uniformly, so that the tape-shaped medium can run smoothly and stably.

Further, according to the present invention, with the above configuration, the rigidity is synthesized.
Upper and lower ends of the outer periphery of the base made of resin material
Elastic synthetic resin material with lower hardness than rigid synthetic resin material
The outer periphery formed by the material is provided,
Since the outer diameter is larger than the outer diameter of the base,
At the time of feeding, the outer periphery is pressed by the capstan
Deformation, and as a result, the base is
It is pressurized by the stan and contributes to the transfer of the tape-shaped medium.

For this reason, the running stability characteristics when the outer peripheral portion of the pinch roller is formed of a soft synthetic resin material and the reduction of the load on the drive of the tape-shaped medium when the outer peripheral portion is formed of the rigid synthetic resin material. Both characteristics can be used, and the running of the tape-shaped medium can be smoothed and stabilized, and the power consumption of the motor for driving the capstan to rotate can be reduced.

[0032]

[0033]

[0034]

Embodiments of the present invention will be described below.

FIG. 4 is a structural view of a camera-integrated VTR using a tape drive according to a first embodiment of the present invention.

In FIG. 4, 1 is a capstan that is driven to rotate, 8 is a tape used for recording and reproduction, 11 is a regulation post, 12 is a pinch arm, 13 is a pinch arm support, 14 is an AC head, 15 is a cylinder, 16 and 17
Is a guide roller, and 18 is a pinch roller for transferring the tape 8 for co-operation with the capstan 1.

FIG. 1 is a sectional view showing a main part of a tape drive according to a first embodiment of the present invention.

In FIG. 1, the base 2 of the pinch roller
Ob and the bearing portion 20a are integrally formed of a rigid synthetic resin material. Also, the outer peripheral portion 21 of the pinch roller
Is formed of an elastic synthetic resin material, and is fixed to the base 20b by baking or the like. The inner diameter of the bearing portion 20a is formed slightly larger than the outer diameter of the support shaft 4 of the pinch roller, and a slight gap 19 is provided between the two.

The operation of the first embodiment of the present invention configured as described above will be described below. The outer peripheral portion 21 of the pinch roller formed of an elastic synthetic resin material is pressed against the capstan 1 which is driven to rotate with the tape 8 interposed therebetween, and the tape 8 is transported in a predetermined direction at a predetermined speed.

Further, in order for the tape 8 to run stably, the outer peripheral portion 21 of the pinch roller needs to be uniformly pressed against the capstan 1, so that the outer peripheral portion 21 must always be kept parallel to the capstan 1. There is.

However, it is difficult to make the support shaft 4 of the pinch roller parallel to the capstan 1 in manufacturing.

This will be described with reference to FIG. Since the tape 8 needs to be run around the cylinder 15 and in contact with the AC head 14, the tape 8 is pulled out by the guide rollers 16 and 17 while the cylinder 15 is being pulled out.
Wrap around. At this time, the regulation post 11
The tape 8 is also pulled out, and after the tape 8 comes into contact with the capstan 1 and the AC head 14, the pinch arm 12 is moved to the pinch arm support shaft 13 at such a timing that the outer peripheral portion 21 of the pinch roller is pressed against the capstan 1. Orbit around. As described above, since the support shaft 4 of the pinch roller moves integrally with the pinch arm 12, the play between the pinch arm 12 and the pinch arm support shaft 13, the bending of the pinch arm 12, and the movement of the pinch roller support shaft 4 with respect to the pinch arm 12 are performed. The pinch roller support shaft 4 is likely to cause a large inclination error with respect to the capstan 1 due to an attachment error or the like.

Therefore, an adequate gap is provided between the inner diameter of the bearing portion 20a of the pinch roller and the outer diameter of the support shaft 4 so as to compensate for the inclination error of the support shaft 4, and the base portion 20 and the outer peripheral portion of the pinch roller. 21 can be freely inclined with respect to the support shaft 4, and when the outer peripheral portion 21 is pressed against the capstan 1, the outer peripheral portion 21 automatically operates so as to be parallel to the capstan 1.

As described above, according to this embodiment, since the outer peripheral portion 21 of the pinch roller is formed of an elastic synthetic resin material, the amount of deformation caused by pressing against the capstan 1 is small. The loss can be reduced, and the torque of the capstan 1 can be reduced, so that a tape drive with low power consumption can be realized.

Further, by using a flexible elastic synthetic resin material having a lower hardness than the rigid synthetic resin material forming the base portion 20b as the outer peripheral portion 21, friction when the outer peripheral portion 21 is pressed against the capstan 1 is reduced. Become larger, outer circumference 2
It is possible to realize a tape driving device that enables stable tape running without causing the tape 8 to slide between the capstan 1 and the capstan 1.

Further, since the outer peripheral portion 21 can be freely inclined with respect to the support shaft 4, the outer peripheral portion 21 and the capstan 1 can always be kept parallel to each other, so that the two are uniformly pressed and the tape 8 is stabilized. And it can run smoothly.

The inclination angle of the outer peripheral portion 21 can be freely determined by adjusting the size of the gap, so that the outer peripheral portion 21 and the capstan 1 can be fixed regardless of the degree of the inclination error of the support shaft 4. Can always be kept parallel.

Further, according to the present embodiment, the pinch roller
The bearing part and the base part are formed integrally, and the pinch roller
The structure is simple, miniaturization and weight reduction are easy, and components
The number of points is small, making it easy to manufacture tape drives and
This will contribute to the reduction of strikes.

Next, a second embodiment of the present invention will be described. FIG. 2 is a sectional view of a main part of a tape drive according to a second embodiment of the present invention.

Referring to FIG. 2, the tape driving device according to the second embodiment of the present invention has a pinch roller made of an elastic synthetic resin material at the upper and lower ends of a base portion 20b of the pinch roller. It has an outer peripheral portion 22.

The other components are the same as those in the first embodiment of the present invention, and therefore, the same reference numerals as those in FIG.

The operation of the second embodiment of the present invention will be described below. An outer peripheral portion 22 of the pinch roller formed of an elastic synthetic resin material provided at an upper end portion and a lower end portion of the base portion 20b of the pinch roller and a base portion 20b formed of a rigid synthetic resin material exposed on the surface of the pinch roller are provided. The tape 8 is pressed against the rotatably driven capstan 1 via the tape 8 and acts to transfer the tape 8 in a predetermined direction.

In this case, since the outer diameter of the outer peripheral portion 22 formed of an elastic synthetic resin material is configured to be larger than the outer diameter of the base portion 20b, the outer peripheral portion 22 is pressed against the capstan 1 by pressing. As a result, the base 20b formed of a rigid synthetic resin material is
It is pressed and contributes to the transfer of the tape 8.

As described above, according to the present embodiment, the running stability characteristics when the outer peripheral portion of the pinch roller is formed by the elastic synthetic resin material and the tape when the outer peripheral portion is formed by the rigid synthetic resin material In addition to smoothing and stabilizing the running of the tape, the torque of the motor that rotates the capstan is reduced, and the power consumption of the tape drive is reduced. Reduction can also be achieved.

By adjusting the pressure applied to the outer peripheral portion 22 pressed against the capstan 1 or the amount of exposure of the base portion 20a of the pinch roller, the balance between the running stability of the tape and the reduction of the running load can be balanced. A good and stable tape running can be realized.

Next, a third embodiment of the present invention will be described. FIG. 3 is a sectional view of a main part of a tape drive according to a third embodiment of the present invention.

In FIG. 3, the base 2 of the pinch roller
Along with Ob, the bearing portion 20a integrally formed of a rigid synthetic resin material is formed by projecting a surface facing the side surface of the support shaft 4 in a wedge shape.

The operation of the third embodiment of the present invention configured as described above will be described.

Even if the support shaft 4 of the pinch roller is tilted in the direction of A or B in FIG. 3 due to manufacturing reasons, the outer peripheral portion 20b of the pinch roller is always kept parallel to the capstan 1. The support shaft 4 is pressed uniformly, and the bearing portion 20a is formed in a wedge shape.
Irrespective of the inclination direction, the one point of the bearing portion 20a is always in contact with the support shaft, and the pinch roller can be rotated, so that the tape can run smoothly.

FIG. 5 is an enlarged sectional view of a bearing portion of a pinch roller used in this embodiment.

In FIG. 5, the outer diameter of the support shaft 4 and the bearing 2
The difference d of the inner diameter of 0a may be extremely small as compared with the first embodiment of the present invention in which the side surface of the bearing portion is formed as a flat surface, and d
Even when = 0, the outer peripheral portion 21 of the pinch roller can be freely tilted with the wedge-shaped vertex of the bearing portion 20a as a fulcrum, so that the effect of the present embodiment can be sufficiently obtained.

The pinch roller bearing 22a is
Even in the case of a hemispherical configuration as shown in FIG. 6, the same effects as in the present embodiment can be obtained.

[0063]

As described above, according to the present invention, since the upper end and the lower end of the outer peripheral portion of the pinch roller are formed of an elastic synthetic resin material, the capstan is more compact than the rubber member.
Small amount of deformation when it is pressurized, the load of the pinch roller can be reduced caused by the deformation loss of the outer peripheral portion can also be reduced torque of the motor for rotating the turn capstan.

Further, such a reduction in the torque of the capstan motor contributes to a reduction in the power consumption of the tape driving device, and as a result, contributes to a long-time recording / playback of a camera-integrated VTR or a tape recorder. .

[0065]

Further, according to the present invention, since the outer periphery formed of the elastic synthetic resin material is provided only at the upper end and the lower end of the pinch roller, both the outer periphery and the base of the pinch roller are provided. It is pressed against the capstan that is driven to rotate and contributes to the transfer of the tape-shaped medium. The tape running characteristics when the outer peripheral portion is formed of an elastic synthetic resin material, and the outer peripheral portion is formed of a rigid synthetic resin material. In this case, both the characteristics of reducing the load on the tape drive can be used in a well-balanced manner, and a tape drive device that can efficiently and stably run the tape-shaped medium can be realized.

[0067]

[0068]

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a tape driving device according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a tape driving device according to a second embodiment of the present invention;

FIG. 3 is a sectional view of a main part of a tape drive according to a third embodiment of the present invention;

FIG. 4 is a structural diagram of a camera-integrated VTR using a tape drive device according to a first embodiment of the present invention.

FIG. 5 is an enlarged sectional view of a bearing portion of a pinch roller used in a tape driving device according to a third embodiment of the present invention.

FIG. 6 is an enlarged sectional view of a bearing portion of a pinch roller used in a tape driving device according to a third embodiment of the present invention.

FIG. 7 is a sectional view of a main part of a conventional tape drive.

FIG. 8 is a sectional view of a main part of a conventional tape drive.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Capstan 4 Support axis of pinch roller 8 Tape medium 20a Bearing part of pinch roller 20b Base part of pinch roller 21 Peripheral part of pinch roller

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-159419 (JP, A) JP-A-3-263643 (JP, A) JP-A-2-123546 (JP, A) 12296 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) G11B 15/29

Claims (1)

(57) [Claims] 1. A capstan driving means, a capstan rotatably driven by the capstan driving means, and a pinch roller pressed against the capstan to transfer a tape-shaped medium, the pinch roller being supported A shaft, a bearing portion for receiving the support shaft, a base portion integrally formed with the bearing portion from a rigid synthetic resin material,
The rigid body is provided at the upper end and the lower end outside the base.
Made of elastic synthetic resin material with lower hardness than elastic synthetic resin material
Outer periphery of the tape-shaped medium before transporting the tape-shaped medium.
The upper end and lower end of the pinch roller and the base portion
Pressurize the capstan, at least the base
A tape drive device, wherein pressure is applied to the capstan via the tape-shaped medium .