JPS6194256A - Tape driver for recording and reproducing device - Google Patents

Abstract

PURPOSE:To reduce the thickness of a recording/reproducing device main body by raising up a fallen pinch roller after a magnetic tape is loaded to a tape driving path and then pressing the pinch roller to a capstan. CONSTITUTION:A pinch roller 1 provided within a tape driving path is kept fallen before a magnetic tape 2 is loaded. Then the roller 1 is raised up when the tape 2 is loaded, and the roller 1 received the position accuracy is pressed to the capstan 3. Then the pinched tape 2 is driven. Thus the tape 2 can be easily loaded and unloaded despite the roller 1 set inside the tape driving path since the roller 1 is mobile. Furthermore the capstan 3 can be easily taken outside with upper and lower bearings provided. This attains a thin design of a VTR main body.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tape drive device for a recording/reproducing device that pinches and drives a magnetic tape using a capstan and a pinch roller, and in particular, the present invention relates to a tape drive device for a recording/reproducing device that pinches and drives a magnetic tape using a capstan and a pinch roller. This relates to a tape drive device of a recording/reproducing device in which the pinch roller, which had been inverted, stands up and is pressed against the capstan after the capstan is attached.

[Conventional technology]

In a cassette-type video tape recorder (hereinafter referred to as VTR), which is a recording and reproducing device, a magnetic tape is pulled out from a tape cassette by loading, and after being wound around a tape guide drum equipped with a rotating magnetic head, the tape is inserted into a capstan. The tape is pinched by a pinch roller and driven.

Conventionally, in a tape drive device that drives the tape using a capstan and a pinch roller, during loading, the pinch roller placed on the loading ring enters the tape cassette together with other tape guides, pulls the tape out of the cassette, and then Some devices drive the tape by pressing a pinch roller against a capstan.

Further, as another tape drive device, there is one in which a capstan is inserted into a tape cassette, and after loading is completed, a pinch roller is pressed against the capstan in the cassette to drive the tape.

In such a tape drive device, each tape cassette is designed in consideration of the entry of the pinch roller and the arrangement of the capstan, and the tape force that can be used is limited. Naturally, there is less freedom in designing the loading mechanism and tape drive.

For example, in the former type of tape drive device in which the pinch roller enters the cassette and the tape is pulled out, it is not possible to use, for example, an 8-way video cassette, which does not have space to insert the pinch roller into the cassette.

In addition, in the latter type of tape drive device in which a pinch roller is pressed against a capstan inside a tape cassette, there is no space for the pinch roller to enter into the tape cassette used, and a mechanism in which the capstan is placed outside the cassette is required. It is not possible to do so. In addition, in this tape drive, since the capstan is placed inside the cassette, it is not possible to install bearings for the capstan shaft above and below the shaft, so two bearings are placed at the bottom of the capstan shaft. ing. For this reason, the thickness of the VTR body increases, making it difficult to make the VTR thinner.

[Problem that the invention seeks to solve]

As described above, in the conventional tape drive device, the tape cassettes that can be used are limited, and it is not possible to use, for example, an 8 mm video cassette, which does not have a space for the pinch roller to enter. Furthermore, the degree of freedom in designing the tape drive device is reduced.

In particular, in a tape drive device that presses a pinch roller against a capstan inside a tape cassette, there is no space for the pinch roller to enter into the cassette, and the capstan cannot be disposed outside the cassette. For this reason, it is necessary to arrange two bearings at the lower part of the capstan shaft, which poses a problem of increasing the thickness of the VTR and main body.

The present invention was proposed in order to solve these conventional problems, and any tape cassette can be used as long as there is space for the loading guide pin, and it is suitable for designing tape drives. It is an object of the present invention to provide a tape drive device for a recording and reproducing apparatus that has a degree of freedom in terms of performance and allows the main body of the recording and reproducing apparatus to be made thin.

[Means for solving problems]

In order to achieve this object, the tape drive device of the recording and reproducing apparatus of the present invention clamps and drives the magnetic tape between a capstan and a pinch roller. After being installed on the road, the pinch roller, which had been inverted, is erected with positional accuracy relative to the capstan, and then the pinch roller is pressed against the capstan.

[Effect]

Therefore, in the present invention, the pinch roller does not get in the way when loading the magnetic tape, and loading can be easily performed. The pinch roller is located near the capstan, so any tape cassette with space for a guide pin can be used. In addition, the capstan can be taken out of the tape cassette, and a double-sided capstan with bearings at the top and bottom can be used, allowing the recording and reproducing device to be made thinner.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is a perspective view showing a tape drive device of a recording/reproducing apparatus according to an embodiment of the present invention. In this embodiment, a cassette-type VTR, for example, will be used as an example of a recording/reproducing apparatus.

In this tape drive device, the pinch roller 1 is a movable pinch roller and can be placed in an inverted state or an upright state. This pinch roller 1 provided inside the tape running path is inverted before loading starts, and stands up when the magnetic tape 2 is attached to the tape running path by loading. Then, the pinch roller 1, whose positional accuracy has been achieved with respect to the capstan 3 by standing up, is pressed against the capstan 3 and drives the magnetic tape 2 held between the pinch rollers 1 and 3.

In this No. 1111m, to explain the configuration of the tape drive device, a lever 4 having a mouth shape, and a lever 5 arranged below this lever 4 and having a shaft support having a mouth shape, are as follows:
It is rotatably attached to a support shaft 7 which is erected on the chassis 6 and placed outside the tape running path. Lever 5 is
As shown in FIG. 2, the lower arm portion 9 of the lever 5 is in contact with the large diameter portion 8 of the support shaft 7, and is mounted on the chassis 6 at a distance. Further, the lever 4 above the lever 5 is held on the spindle 7 by an EIJ ring 10 at the upper end of the spindle 7. A return coil spring 11 is fitted into the U-shaped portion of the lever 5 on the support shaft 7, and the return coil spring 11
One end is hooked to the lower arm portion 12 of the lever 4, and the other end is hooked to the arm portion 9 of the lever 5. As a result, these levers 4 and 5 are urged to be pressed together. Further, the lower arm portion 1 of the lever 4 extending in the lateral direction
2 is provided with a bent portion 13 bent toward the lower right side in FIG. Further, a pin 14 is installed on the chassis 6 on the right side of the lever 4 in the figure.

A coil spring 15 is hooked between the pin 14 and the bent portion 13. The lever 4, which is biased counterclockwise by the coil spring 15, is stopped when the bent portion 13 comes into contact with a stopper 16 that is raised from the chassis 6. Further, the left side portion 18 of the lower arm portion 12, which the shaft 17 of the pinch roller 1 (described later) comes into contact with when standing up, is formed into an irregular straight line. Further, a V-shaped notch 20 into which the upper end of the shaft 17 fits when the upper arm 19 of the lever 4 is erected is provided near the left end of the upper arm 19 of the fourth lever.
An inclined portion 21 is formed at the tip of the arm portion 19 to guide the upper end of the shaft 17 so that it fits into the notch 20 . Further, a leaf spring 22 is attached to the left side of the upper arm portion 19 to prevent the shaft 17 fitted into the notch 20 from escaping. Further, at the tip of the lower arm 9 of the lever 5, a pair of bearings 23 bent upward is attached to the bent portion 1.
It is provided at a position corresponding to 3.

Further, the lever 24 is located on the outside of the portion 23 of the bearing and the shaft 25 is attached to the shaft 25.
It is rotatably mounted.

The shaft 17 is fixed approximately at the center of the lever 24, and the pinch roller 1 is rotatably attached to the shaft 17 via a bearing. Here, when the pinch roller 1 is inverted, the lever 4
, 5 are pressed together, the head 26 of the shaft 25 is brought into contact with the bent portion 13 of the lever 4. Further, the above-mentioned Renoku 24 is provided with an arm portion 27 hanging down on the lower right side,
A pin 28 is implanted approximately at the tip of the arm portion 27 so as to be approximately parallel to the chassis 6.

Also, on the right side extension line of the axis 25 in FIG.

A support shaft 29 is installed on the chassis 6, and this support shaft 2
A flat plate-shaped lever 30 is rotatably attached to the lever 9 so as to be pivotally supported at approximately the center thereof. This lever 30
is substantially parallel to the 6th surface of the chassis, and is provided at a distance from the 6th surface of the chassis. In addition, a pin 31 is implanted at the upper part of the lever 30 and on the left side of the support shaft 29 at approximately the center in the width direction of the lever 30, and on the chassis 6 which is on the above-mentioned extension line and further to the right of the lever 30. A pin 32 is implanted in the pin 32 . A coil spring 33 is hooked between these pins 31 and 32. This coil spring 33 biases the lever 30 to rotate in the direction of the arrow in FIG. The lever 30 stops when it hits the stopper pins 34 and 35 that are set in the position. Furthermore, on the lever 30, there are two pins 36.3 at the tip end on the lever 24 side.
7 are implanted, and the pin 28 is sandwiched between these pins 36 and 37. Further, a slit 38 formed from the tip end is provided at approximately the center of the lever 30 in the width direction and on the pin 32 side.

Further, as an extension of the above, a gear 40 is provided between the lever 30 and the pin 32 and is rotatably attached to a support shaft 39 that stands up from the chassis 6. An arm 41 is fixed to the upper part of the gear 40. ing.

Further, a pin 42 that fits into the slit 38 is installed at the tip of the arm 41. Further, as shown in FIG. 1, a gear 43 is meshed with the gear 40.
A driving force from a motor (not shown) is applied to the gear 40 via the gear 3 .

Further, a capstan 3 is disposed on the left side of the pinch roller 1 in the 11th meter and outside the tape running path. This capstan 3 is housed in a capstan housing 44 fixed on the chassis 6, and is rotatable via bearings arranged above and below inside the capstan housing 44. The capstan 3, which is a double-sided capstan with bearings on both upper and lower sides, receives driving force from a motor (not shown) disposed at the bottom of the chassis 6.

The operation of the tape drive device configured in this way will be explained below. When loading is started to pull out a magnetic tape from a tape cassette loaded in a VTR,
Gear 40, which had been stopped, rotates and pin 4 on arm 41
2 starts rotating in the direction of arrow C from the N point position in FIG.

At this time, the pinch roller 1 is placed upside down on the chassis 6 as shown by the imaginary line in FIG. Further, the lever 30 is biased by a spring and is stopped at a position shown by the imaginary line in FIG. 3 in a state in which it is in contact with a pin 35 on the chassis 6. The magnetic tape 2, which has passed over the pinch roller 1 which has been inverted as the loading progresses, moves to the arm 12 of the lever 4, which is the tape running path.
, 19, the pin 42 on the rotating arm 41 fits into the slit 38 of the lever 30.

When the arm 41 further rotates, the pin 42 is fitted into the slit 38, and the lever 30 is moved in the direction indicated by the arrow A.
’ direction. This rotation of the lever 30 causes the pin 36 on the lever 30 to come into contact with the pin 28 provided on the lever 24, causing the lever 24 to rotate clockwise in FIG. 2 about the shaft 25.

As the lever 27 rotates clockwise, the pinch roller 1 rotates in the direction of arrow S in FIG. 1 and stands up.

The upper end of the shaft 17 of the pinch roller 1 is connected to the lever 4.
It is guided by the inclined portion 21 of and fits into the opening 20. Here, when the upper end of the shirt 17 is guided to the inclined part 21, the lever 9 returns to the coil spring 11.
Temporarily rotates clockwise against the As shown in FIG. 4, the upright pinch roller 17 has the upper end of the shaft 17 fitted into the notch 20, the lower part of the shaft N7 abutting the left side 18 of the arm 12 of the lever 4, and the pinch roller 17 being pushed against the capstan 3. Positioning is performed with high precision so that they are parallel. Here, the leaf spring 22 biases the shaft 17 against the notch 20 and the left side portion 18. At this time, the head 26 of the shaft 25 is separated from the bent portion 13 of the lever 9, as shown in FIG.

Further, when the rotating lever 30 comes into contact with the pin 34 on the chassis 6 and stops, the pin 42 on the arm 41 and the slit 38 no longer fit together, and the gear 40 rotates until the pin 42 reaches the position M in FIG. Stop at that point. This M
The point is the loading end point. At this time, the lever 30 in contact with the pin 34 is biased by the spring 33.

The pinch roller 1, which has been accurately positioned and erected in this manner, is then pressed against the capstan 3 by rotating the lever 4 in the direction of arrow S in FIG. 1 against the force of the spring 15. As a result, the clamped magnetic tape 2 is driven. The mechanism for rotating the lever 4 in the S direction and press-fitting the pinch roller 1 to the capstan 3 can be constituted by a commonly known mechanism.

Furthermore, during unloading to release the magnetic tape wrapped around the tape guide drum, the pinch roller 1 is inverted by an operation opposite to the above-described loading operation. At this time, the pin 42 on the arm 41 rotates in the direction indicated by the arrow, so that the lever 30, which rotates in the direction of the arrow S, acts to rotate the pinch roller 1 in the direction of the arrow F, to the position shown by the imaginary line. pinch roller 1
becomes inverted. By inverting the pinch roller 1 in this way, the magnetic tape can be easily released.

By the way, the positioning accuracy of the upright pinch roller 1 can be improved by increasing the accuracy of the pivoting position of the lever 24 to which the shaft 1T is fixed to the lever 5 and the formation position of the notch 20. be done. In addition, since the pressing force of the pinch roller 1 pressed against the capstan 3 is received by the upper and lower parts of the shaft 17 that contact the lever 4, no force is applied to the portion of the shaft 17 fixed to the lever 24 or the shaft 25. There is no looseness in these parts. This is an advantage of having the levers 4 and 5 in two stages.

In this way, in the above-mentioned tape drive device, since the pinch roller 1 is a movable pinch roller, it is possible to easily load and unload the magnetic tape 2 even though the pinch roller 1 is provided inside the tape running path. can be done. Furthermore, any tape cassette can be used as long as there is space for the loading guide pin to enter. In addition, since the capstan 3 can be easily taken out of the cassette and can be used as a double-sided capstan with bearings at the top and bottom, V
The TR main body can be made thinner. Furthermore, the degree of freedom in designing the loading mechanism and tape drive mechanism is increased.

Note that the tape drive device described above can be of a tape cassette type.

〔Effect of the invention〕

As explained above, according to the present invention, after the magnetic tape is mounted on the tape running path by loading, the pinch roller, which had been inverted, is raised up. The pinch roller, which has been raised to achieve positional accuracy, is pressed against the capstan and drives the clamped magnetic tape.

Therefore, any tape cassette can be used as long as there is space for the loading guide pin.

Further, the capstan can be a double-sided capstan, and the main body of the recording/reproducing apparatus can be made thinner.

Furthermore, there is no need to arrange a pinch roller on the loading ring, and the capstan can be taken out of the tape cassette, allowing greater freedom in designing the loading mechanism and tape drive device.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a tape drive device according to an embodiment of the present invention;
FIG. 2 is a side view showing a portion of a lever for attaching a pinch roller used in the drive device, FIG. 3 is a plan view showing a mechanism for moving the pinch roller, and FIG. 4 is a front view of FIG. 2.

Claims (1)

[Claims] In a tape drive device of a recording/reproducing device, in which a magnetic tape is held between a capstan and a pinch roller and driven, after the magnetic tape is mounted on the tape running path,
A tape drive device for a recording/reproducing device, characterized in that a pinch roller that has been placed upside down is erected with positional accuracy with respect to a capstan, and then the pinch roller is pressed against the capstan.