JPS6286563A - Reel drive mechanism for magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To reduce the consumed power of a motor by cutting a mechanical connection between a driving motor and an idler arm during driving a reel and substituting a continuous positioning of the idler arm to a selecting reel side by a spring. CONSTITUTION:The selection movement of idler arms 5, 7 to a tape fast forwarding reel 8 side and a tape rewinding reel 9 side is carried out by a drive gear 1 through an idler gear 2. The drive gear 1 is driven by a tape reel driving motor. During driving the reel, a mechanical connection between the tape reel driving motor and the first and the second idler arms 5, 7 is broken. At this time, since the second idler arm 7 is driven toward the drive gear 1 by a spring 15 through a friction slider 14, the second idler arm 7 is successively positioned to the tape fast forwarding reel stand 8 side. In such a constitution, the consumed power of the driving motor is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a reel drive mechanism of a magnetic recording/reproducing device, and more particularly to a tape fast forwarding operation and a tape rewinding operation of a tape recorder, V'L'R, etc. This invention relates to an improvement of this type of reel drive mechanism in which both operations are performed by one common motor.

[Background of the invention]

Recently, as a method for controlling the operation number of magnetic recording and reproducing devices,
In place of the conventional mechanical operation method using push buttons, an electronic operation method is often adopted.

A magnetic recording/reproducing device that employs an electronic operation method electronically controls the drive of the device by inputting an operation selection signal. In other words, in a magnetic recording and reproducing device that employs an electronic operation method, each device (main brake, sub brake, pinch roller, This method uses a motor or a solenoid to perform the operation of using a tensioner (such as a tensile lamp pin), and with this, the operability of the magnetic recording/reproducing device can be improved.

However, if a dedicated motor is used to operate each device based on each command signal in a magnetic recording/reproducing device that employs an electronic operation method, the operability of the device will be further improved, but on the other hand, the device will be bulky. New problems such as increased shape and increased weight arise.

For this reason, conventionally, a mode setting motor is provided as a common drive source for each operation mode, and this motor drives the cam wheel to control the rotation angle of the cam wheel. The magnetic recording and reproducing apparatus is made smaller and lighter in weight.

Furthermore, in the past, for the purpose of simplifying the mechanism, a system has been adopted in which the tape fast-forwarding operation and tape rewinding operation are performed by one common motor. This transmits the rotational force of the tape reel drive motor to the idler, causes the idler arm that supports the idler to oscillate toward the tape fast-forwarding creel side or the tape rewinding reel side, and uses the idler's rotational force to fast-forward the tape. The signal is selectively transmitted to the reel side or the tape rewinding reel side.

The details of the above-mentioned reel drive mechanism are, for example,
- The gist of the invention disclosed in the publication is, as stated in its ``Claims for Utility Model Registration,'' that ``a motor pulley is attached to the rotating shaft of the forwarding motor. The idler arm is fixed and rotatably mounted, a leaf spring is supported on the idler arm and the leaf spring is pressed against the rotating shaft, an idler that contacts the motor pulley is mounted on the idler arm, and the idler is The tape is loosely inserted between the take-up reel stand and the supply reel stand.According to this, the tape fast forwarding operation and the tape rewinding operation can be performed by one common motor. It is possible to simplify the mechanism.

However, in the reel drive mechanism shown in Japanese Utility Model Application Publication No. 58-163041, when the idler is brought into contact with the tape fast-forwarding reel side or the tape rewinding reel side by selectively swinging the idler, Not only that, when driving the tape reel, the idler arm is pressed against the tape fast forwarding reel side and furthermore the tape rewinding reel side, so the friction torque acts as loss torque of the tape reel driving motor, causing the problem. The power consumption of the motor has to be increased.

In addition, the reel drive mechanism shown in Japanese Utility Model Application Publication No. 58-163041 is adopted in a vertical pull-type magnetic recording/reproducing device, and this magnetic recording/reproducing device can be used to fast-forward or rewind a tape while being carried around. When performing operations, when shifting to each mode, make sure that the idler does not malfunction in the direction of movement due to its own weight or centrifugal force.
It is necessary to increase the pressure force between the idler arm and the motor rotating shaft, which also causes an increase in the power consumption of the tape reel driving motor.

[Purpose of the invention]

The present invention was made as a result of various studies in order to solve the above-mentioned problems of the prior art, and its purpose is to reduce the load of the tape reel drive motor by an electronic operation method. It is an object of the present invention to provide an improved reel drive mechanism for a magnetic recording and reproducing device that can reduce the cost of conventional magnetic recording and reproducing devices and reduce the power consumption of the motor.

[Summary of the invention]

In order to achieve the above object, the present invention transmits the rotational force of a tape reel drive motor to an idler, and causes an idler arm supporting the idler to perform swinging motion toward the tape fast-forwarding reel or the tape rewinding reel. , in a reel drive mechanism of a magnetic recording/reproducing device that selectively transmits the rotational force of the idler to the tape fast-forward serial reel side or the tape rewind reel side, selectively moving the idler arm to the tape fast-forwarding serial side and tape rewinding. Selection movement to the rewind reel side is performed by the tape reel drive motor via the idler, and when the reel is driven, the mechanical connection between the tape reel drive motor and the idler arm is cut off, and the idler arm is selected. The apparatus is characterized in that continuous positioning toward the reel is replaced by a spring attached between the idler arm and the base plate.

[Embodiments of the invention]

Hereinafter, the present invention will be explained based on one embodiment of the drawings. FIG. 1 is a longitudinal cross-sectional view of the main part of the reel drive mechanism according to the present invention showing a state in which the tape is stopped, and FIG. 2 is the same as that of FIG. FIG. 3 is a plan view of a state in which the tape is rapidly forwarded by the mechanism of the present invention.

1 and 2, 1 is a drive gear, 2 is an idler gear that meshes with the drive gear 1, and the drive gear 1 is fixed to a rotating shaft 4 so as to rotate together with a pulley 3. , the pulley 3 is connected to a rotating shaft of a tape reel drive motor via a belt (not shown).

The idler gear 2 is rotatably supported by an idler support shaft 6 on a first idler arm 5 having a rotation shaft 4 as a fulcrum, and is constantly engaged with the drive gear 1.

7 is the second idler arm;
One end is rotatably supported by the idler support shaft 6, and the second idler arm 7 is located at an equal distance from both the tape fast forward series reel stand 8 and the tape rewind reel stand 9. and is supported so as to be slidable on the substrate 10.

Further, the second idler arm 7 is biased toward the drive gear 1 via a biasing lever 11 and a spring 12 that are engaged with an end of the arm 7. 13 is a control slider, and like the second idler arm 7, the control slider 13 is connected to a tape fast-forwarding reel stand 8 and a tape rewinding reel stand 9.
and is supported so as to be slidable on the substrate 10. 14 is a friction slider, the friction slider 14 is slidably mounted on the control slider 13, and the control slider 13 and the friction slider 14 are:
A spring 15 attached between both sliders [, 14]
It is integrally attached via the

Next, a so-called tape fast-forward mode in which the tape fast-forward reel table 8 is driven by the idler gear 2 will be explained based on FIG.

As mentioned above, FIGS. 1 and 2 show the state where the tape is stopped, and the cam (i.e.,
By setting the cam of the cam wheel rotated by the mode setting motor common to each operation mode in a predetermined position, the control slider 13 is moved to the drive gear 1 side (arrow
, is moved in the direction of the force. Also, at this time, the friction slider 1 slidably mounted on the control slider 13
4 is pulled toward the drive gear 1 via a spring 15 attached between both sliders 13 and 14, and a part of the friction slider 14 (indicated by reference numeral 14' in FIGS. 1 and 2) , is pressed against a part of the idler gear 2 (indicated by reference numeral 2' in FIG. 1). That is, the friction slider 14
is pulled toward the drive gear 1 via the spring 15, and the friction slider 14 is pressed against the idler gear 2, thereby preventing the idler gear 2 from rotating around the drive gear 1. It is set at a so-called neutral position where it does not mesh with either the feed reel stand 8 or the tape rewind reel stand 9.

Therefore, in the tape fast forward mode, the drive gear is in the second
When the rotation starts in the direction of the arrow a in the figure, the idler gear 2 meshing with the drive gear 1 starts rotating in the direction of the arrow a in FIG. Also, at this time, the idler gear 2 is
Since the idler support shaft 6 is pressed by the friction slider 14, the idler support shaft 6 starts moving in the direction of arrow 0 in FIG. When moved, the first idler arm 5 and the second idler arm 7 deform into a "<" shape. As the movement of the idler support shaft 6 in the direction intersecting the sliding direction of the friction slider 14 further progresses, the "<"-shaped deformation between the first idler arm 5 and the second idler arm 7 becomes large. In this case, the friction slider 14 and the idler gear 2 are disengaged, and the mechanical connection between the tape reel drive motor and the first and second idler arms 5, 7 is broken. time, second
Since the idler arm 7 is pulled in the direction of the drive gear 1 by the spring 15 with the friction slider 14 interposed, the tape fast-forwarding reel stand 8 of the second idler arm 7
Positioning to the side is performed continuously, and the idler gear 2 meshes with the tape fast-forwarding reel stand 8, as shown in FIG. Therefore, during the subsequent tape rapid forwarding operation, the rotational force of the drive gear 1 is transferred to the idler gear 2.
At this time, the continuous positioning of the second idler arm 7 toward the tape fast-forward series reel table 8 is performed by a spring 15, and the tape reel Since the mechanical connection between the drive motor and the first and second idler arms 5,7 is broken, during tape fast-forwarding operation, the first and second idler arms 5,7 are connected to the tape fast-forwarding series. It is not pressed against the stand 8 side, and as a result, both arms 5.7 are pressed against the tape fast-forward reel stand 8 side, generating friction torque, which acts as loss torque of the tape reel drive motor. Therefore, the power consumption of the tape reel drive motor is less than that of conventional magnetic recording and reproducing devices that employ an electronic operation method, and the same can be said of the tape rewinding operation described later. .

In addition, when the reel drive mechanism shown in the illustrated embodiment is employed in a tear-pull type magnetic recording/reproducing device, if a spring material with a large tensile force is used for the spring 15, tape fast forwarding and winding can be performed while carrying the magnetic recording/reproducing device. Even when performing a return operation, when shifting to each mode, malfunctions in the moving direction of the idler will not occur due to the idler's own weight or centrifugal force. That is, even if a spring material with a large tensile force is used for the above-mentioned spring 15, the connection between the tape reel drive motor and the first and second idler arms 5.7 during tape fast forwarding and tape rewinding operations. Since the mechanical connection between the two is broken, the tensile force of the spring 15 does not act as loss torque of the tape reel drive motor, which is sufficient for the purpose of the present invention, which is to reduce the power consumption of the tape reel drive motor. It has come true.

Here, a so-called tape stop mode, which transitions from a tape fast-forward state to a tape stop state, will be described.

When the tape stop mode is operated or the end of the tape is detected, the rotation of the tape reel drive motor is stopped, and at the same time, the brakes are applied to the tape fast forward reel table 8 and the tape rewind reel table 9.

When the rotation of the tape reel drive motor is stopped and the brakes are applied to both reel stands 8 and 9, the control slider 13 is activated by the cam operation of the cam wheel rotated by the mode setting motor common to each operation mode. is the arrow x
Move in direction 2. When the control slider 13 moves in the direction of arrow x2, the friction slider 14 mounted on the control slider 13 also moves in the same direction, and one end of the control slider 15 (indicated by reference numeral 13' in FIGS. 1 to 3) moves in the same direction. show)
comes into contact with the support shaft of the second idler arm 7 (indicated by the reference numeral 7' in FIGS. 1 to 3), and the first idler arm 5 and the The idler arms 7 of No. 2 are aligned in a straight line. Also, at this time, the meshing between the idler gear 2 and the tape fast-forwarding series reel stand 8 is released,
The idler gear 2 is located at an equal distance from both the tape fast-forward reel stand 8 and the tape rewind reel stand 9 and stops. When the idler gear 2 returns to the intermediate position between the IJ-ru bases 8 and 9, the control slider 13 moves in the direction of arrow x1, and the friction slider 14 mounted on the control slider 13 also moves in the same direction. A part of the friction slider 14 (
1 and 2) presses again a part of the idler gear 2 (designated 2' in FIG. 1);
The tape is set to the stop state shown in FIGS. 1 and 2.

Note that the so-called tape rewind mode in which the tape rewind reel stand 9 is driven by the idler gear 2 is performed by rotating the drive gear 1 in the opposite direction to that in the tape fast forward mode described above.

That is, by rotating the drive gear 1 in the opposite direction to that in the tape fast-forward multiple mode, both the first idler arm 5 and the second idler arm 7 rotate in the direction opposite to that in the tape rapid-forward multiple mode. ” shape, the idler gear 2 engages with the tape rewind reel stand 9, and the drive gear 1
The rotational force of is transmitted to the tape rewind reel stand 9 through the idler gear 2, and the tape rewind operation is performed.The so-called tape stop mode, in which the tape rewind state transitions to the tape stop state, is This is similar to the case of transitioning from the tape fast-forward state to the tape stop state described above.

〔Effect of the invention〕

The present invention is as described above, and as is clear from the description of the illustrated embodiments, the present invention provides selective movement of the idler arm toward the tape fast-forwarding reel side and selective movement of the idler arm toward the tape rewind reel side. is performed by the tape reel drive motor via the eye 2, and when the reel is driven, the mechanical connection between the tape reel drive motor and the idler arm is cut off, and the idler arm is continuously positioned toward the selected reel side. According to the present invention, the load of the tape reel drive motor can be replaced by a spring installed between the idler arm and the board. It is possible to obtain an improved reel drive mechanism for a magnetic recording/reproducing device that is lighter in weight than a recording/reproducing device and can reduce the power consumption of the motor.

[Brief explanation of drawings]

The drawings show an embodiment of the reel drive mechanism according to the present invention,
Figure 1 is a vertical cross-sectional view of the main part showing the state where the tape is stopped, Figure 2
This figure is a plan view of FIG. 1, and FIG. 3 is a plan view of a state in which the tape is fast-forwarded by the mechanism of the present invention. 1... Drive gear 2... Idler gear 3... Pulley 4... Rotating shaft 5... First idler arm 6... ... Idler support shaft 7 ... Second idler arm 8 ... Tape fast-forward reel stand 9 ... Tape rewind reel stand 10 ... Board 11 ...Biasing lever 12 ... Spring 13 ... Control slider 14 ... Friction slider 15 ... Spring

Claims (1)

[Claims] 1. Transmit the rotational force of the tape reel drive motor to the idler, swing the idler arm that supports the idler toward the tape fast-forwarding reel side or the tape rewinding reel side, and transfer the rotational force of the idler to the tape fast-forwarding reel side or to the tape rewinding reel side. In a reel drive mechanism of a magnetic recording/reproducing device that selectively transmits transmission to the tape rewind reel side, selective movement of the idler arm toward the tape fast forward reel side and selective movement toward the tape rewind reel side is transmitted to the tape rewind reel side via the idler. This is performed by the reel drive motor, and when the reel is driven, the mechanical connection between the tape reel drive motor and the idler arm is cut off, and the continuous positioning of the idler arm to the selected reel side is performed by connecting the idler arm and the board. A reel drive mechanism for a magnetic recording/reproducing device, characterized in that the reel drive mechanism is configured to be replaced by a spring attached between the reel drive mechanisms.