JP3014116B2 - Tape loading device in magnetic recording / reproducing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a tape loading device for a cassette type magnetic recording / reproducing device.

[Conventional technology]

2. Description of the Related Art Conventionally, in a tape loading device in a cassette type magnetic recording / reproducing device, a moving base on which a tape guide having flange portions at upper and lower ends and an inclined tape guide are erected moves on a guide plate disposed around a rotary head drum. In this way, a tape is pulled out from the mounted cassette and wound around the peripheral surface of a rotary head drum to form a predetermined tape running system. -850 publication.

[Problems to be solved by the invention]

However, in recent years, magnetic recording / reproducing devices used particularly for business use have been digitized and extended in time.
The size of the cassette has been increased, and furthermore, the demand for higher performance such as high-speed access of the apparatus itself has required a higher output of the reel motor. As a result, the size of the cassette has been unavoidably increased. Also, there is a demand for speeding up of tape loading and tape unloading operations. If the inertia of the reel of the cassette or the inertia of the reel motor is increased, and the tape is loaded at a higher speed, the tape itself may be stopped by the inertia of the reel even after the tape guides that pull out the tape are stopped, for example, when the tape loading is completed. Is excessively sent out, and there is a problem in that slack is generated on the wound tape guides and the peripheral surface of the rotary head drum, and the tape is dropped and damaged. Particularly, in recent years, cassette tapes have tended to be increasingly thinner in response to demands for longer cassette tapes, and the tapes have become more susceptible to damage.

The present invention controls the moving speed of the tape guides serving as a moving member for transporting the tape from the cassette during the tape loading and tape unloading operations, and controls the back tension to the tape. An object of the present invention is to prevent such a phenomenon that the tape is slackened or dropped and protect the tape.

[Means for solving the problem]

In the present invention, in order to achieve the above object, a tape guide that forms a tape running path, a loading motor that drives a tape loading mechanism that draws or stores a tape from a cassette by the tape guide, and an operation phase of the tape loading mechanism are set. A phase detector for detecting, and a reel motor for adding a back tension to the tape, in a first section before the tape is pulled out by the tape guide and wound around a rotary head drum during tape loading. The driving voltage to the loading motor in a second section from the time when the tape starts to be wound around the rotary head drum to the time when the movement of the tape guide is completed is set lower than the driving voltage to the loading motor, Drive to the reel motor in section 1 Than pressure is obtained by setting a high driving voltage to the reel motor in the second section. Further, at the time of tape unloading, the drive voltage to the reel motor in the third section before the tape guide moves is lower than the drive voltage to the reel motor in the fourth section in which the tape guide moves and stores the tape. The drive voltage to the motor was set low. By these, the moving position of the tape guides at the time of tape loading and tape unloading operation is sequentially detected, and the driving force of the driving source and the back tension to be added to the tape are determined according to the detected moving position. It is made to change.

[Action]

When performing the tape loading or tape unloading operation, the moving position of the tape guides for guiding and moving the cassette tape is sequentially detected by the detecting means,
The driving force from the driving source for moving the tape guides and the torque applied to the reel motor for applying the back tension to the tape are changed in accordance with the respective moving positions. This prevents the tape from sagging or falling off during the tape loading or tape unloading operation, and does not damage the tape.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIGS. 2, 3 and 4 are plan views showing a mechanism configuration of one embodiment of the present invention, FIG. 2 shows a state during tape loading, and FIG. 3 shows a tape loading operation. FIG. 4 shows the state before the tape loading operation is completed. In FIG. 2, reference numeral 2 denotes a rotary head drum device on which a rotating magnetic head for recording or reproduction is mounted. Reference numeral 3 denotes a cassette around which the tape 6 is wound. An opening 7 is provided on the front surface of the cassette 3, and the tape 6 is stretched over the opening 7 as shown in FIG. When the cassette 3 is mounted on the apparatus, the supply side draw-out guide 10, the tape guide 12 and the inclined tape guide 14 erected on the moving base 19 moving on the supply side, and the moving base moving on the winding side are provided in the opening 7. The inclined tape guide 15 and the tape guide 13, the pinch roller 16, and the take-up side pull-out guide 11, which are set on the top 21, are inserted. The moving bases 19 and 21 are driven by transmitting a driving force from a loading motor 106 as a driving source, and move on the guide plate along guide grooves 24 and 25 provided in the guide plate 23. It is configured. The tape loading completion position is determined on the moving base by fixing means 26 and 27 provided near both sides of the rotary head drum device 2.
19 and 21 are positioned and held, and the winding of the tape 6 around the rotary head drum device 2 is performed.

The supply-side pull-out guide 10 is driven by the same loading motor 106 as the moving base, and is positioned at the position shown in FIG. 4 to form a tape running path on the tape supply side. That is, the tape 6 is connected to the supply side pullout guide 10.
While being pulled out, it is wound around the supply side tape guide 30 and the tension pin 31 for detecting the tape tension, and the inclined tape guide 40 through the supply side pullout guide,
The tape abuts on the tape guide 42 and the full width erasing head 41, and is wound around the rotary head drum device 2 by the tape guide 12 and the inclined tape guide 14 on the moving base 19.

Similarly, the take-up side pull-out guide 11 is
While being driven by 6 and positioned to the position shown in FIG. 4, the tape 6 passes through the rotary head drum device 2 and hits the inclined tape guide 15 and the tape guide 13 on the take-up moving base 21; Abut on the A / C head 43, and then, while winding the tape guide 44, the inclined tape guide 45, and further the tape guide 46, the capstan 47, the winding-side drawer guide 11,
It reaches the cassette 3 via the tape guide 38, and forms a tape running path on the tape winding side.

As shown in FIG. 4, the tape running path formed in the tape loading completed state is three-dimensionally constituted by four inclined tape guides 40, 14, 15 and 45. In this state, the capstan 47 presses and holds the tape 6 together with the pinch roller 16 and is driven by the driving force of a capstan motor (not shown) to drive and run the tape 6.

The above-described tape loading or tape unloading operation is performed by a mechanism as shown in FIGS. FIG. 5 shows the supply-side moving base driving mechanism, and FIG. 6 shows the winding-side moving base driving mechanism. A slide plate 52 is attached to the supply-side loading ring 51, and the slide plate 52 is connected to the supply-side movable base 19 via a connection plate 56. Although not shown, the slide plate 52 is urged in one direction by a spring, and even after the moving base 19 is moved and positioned on the guide plate by the tape loading operation, the loading ring 51 is kept in the spring for a predetermined section. By continuing rotation against the force, the movable base 19 is positioned and pressed. The same applies to the winding side.

The supply-side loading ring 51 and the winding-side loading ring 57 are arranged concentrically around the rotary head drum 2 by the support members 53, 54, 55 and 62, 63, 64. Avoid interference. Both of the loading rings 51 and 57 transmit driving force from a loading motor 106, which is a driving source, through a cam gear 50, and rotate around the support members 53, 54, 55, 62, 63 and 64. The power transmission gears 59, 60, 61 are configured to rotate in opposite directions. Reference numeral 103 denotes a potentiometer for detecting a tape loading operation position.

Further, as shown in FIG. 5, sensors 101 and 102 for detecting a tape loading completion or a tape unloading completion position are installed below the supply side loading ring 51, and are attached to the back side of the supply side loading ring. The shutters 98 and 99 detect the completion of tape loading or the completion of tape unloading by shutting off the sensor as shown in FIG.

FIGS. 8 and 9 show the drive mechanism of the supply-side pull-out guide 10 and the winding-side pull-out guide 11. FIG. The supply-side extraction guide 10 and the winding-side extraction guide 11 operate as follows. That is, if the loading motor 106 is driven in the tape loading direction. The driving force is transmitted to the cam gear 50,
The cam gear 50 rotates around the rotation fulcrum 75 in the tape loading direction. As a result, the drive arm 79 having a fan-shaped gear at one end rotates around the rotation fulcrum 78 according to the cam groove 76 provided on the lower surface of the cam gear 50. The gear portion of the drive arm 79 meshes with a gear 91.
The supply side withdrawal guide 10
It is rotated around 17. The driving arm 79 is connected to an L-shaped connecting arm 82 via a pin 80 provided at the other end.
And the connecting arm 82 has a pin 83 disposed at one end thereof.
Is connected to the slider 84 via the. When the slider 84 is driven and slid, the pull-out arm 28 is rotated, and as a result, the winding-side pull-out guide 11 is rotated to pull out the tape 6. The same applies to the tape unloading operation.

As described above, the tape loading operation and the tape unloading operation are performed via the cam gear 50 from the loading motor 106 which is a driving source. The rotation phase of the cam gear 50 and the output from the potentiometer 103 rotating in mesh with each other have a one-to-one correspondence. By detecting the output of the potentiometer 103, it is possible to know the tape loading and tape unloading operation positions. Can be.

FIG. 1 shows a system configuration diagram of the present invention. Reference numeral 100 denotes a microcomputer (hereinafter, abbreviated to a microcomputer) for controlling the present system. The microcomputer 100 receives output signals from a loading completion sensor 101 that detects a tape loading operation completion position, an unloading completion sensor 102 that similarly detects a tape unloading operation completion position, and an output signal from the potentiometer 103. Sent. In the microcomputer 100, a loading motor 106 according to an output signal from the potentiometer 103 is provided.
Drive control signals to the reel motors 104 and 105 are set in advance for each of the tape loading and tape unloading operations. The above potentiometer
The output signal from the tape 103 is reset to 0 when a tape unloading completion signal is received from the unloading completion sensor 102 during the tape loading operation, and gradually increases in the tape loading direction, and conversely, at the time of the tape unloading operation, When a tape loading completion signal is received from the loading completion sensor 101, it is reset to 0 and counted in the microcomputer 100 so as to gradually increase in the tape unloading direction. Microcomputer 100
When the tape loading operation command is received from the operation command signal input terminal 107, the unloading completion sensor
Calculate the loading phase based on the output value of the potentiometer 103 when receiving the output signal of 102, and send a control signal to the supply-side and take-up-side reel motors 104 and 105 so as to add a tape back tension according to the calculation. At the same time, a predetermined drive control signal is sent to the loading motor 106. Similarly, if a tape unloading operation command is received, the unloading phase is calculated based on the output value of the potentiometer 103 when the output signal of the loading completion sensor 101 is received, and the control signal corresponding to the unloading phase is calculated. Is sent.

The control operation according to the present invention will be described with reference to FIGS. 9A is a curve showing a change in voltage applied to the loading motor 106 during the tape loading operation, FIG. 9B is a diagram showing a change in the tape back tension, and FIG. 9C is a curve showing the tape during the tape loading operation. It is a figure which shows the amount of withdrawal, (d) is a conceptual diagram which shows the relationship between the change of the amount of tape withdrawal, and back tension.
Similarly, FIG. 10 shows the above relationships during the tape unloading operation. In each case, the horizontal axis indicates the loading phase obtained from the output value from the potentiometer.

Control during the tape loading operation will be described.
In FIG. 9, a section indicated by A indicates a period from when the tape 6 is pulled out of the cassette 3 to before the wound tape is wound around the rotary head drum 2. Here, the section immediately after the start of the tape loading operation indicated by Δ is the section in which the tape 6 starts to be wound around and conveyed by each of the tape guides to be drawn out, so that the loading motor 106 is driven at a low speed. In section A, the tape 6 is pulled out in parallel with the cassette and can maintain a stable posture. Therefore, in order to shorten the tape loading time as much as possible, the loading motor 106 is driven so as to drive the tape guides at high speed. Change the applied voltage. At this time,
The back tension applied from the reel motors 104 and 105 to the tape 6 is set as small as possible within a range where the tape 6 does not slack. Also, at the moment of tape loading start, a large back tension is given to the tape 6, which eliminates the slack of the tape in the cassette,
This is to adjust the height of the tape correctly for each tape guide that has started the tape loading operation. Therefore, if the magnetic recording / reproducing apparatus automatically performs the tape loading operation when the cassette is inserted and set at the predetermined position, the above operation may be performed before the tape loading operation starts.

In FIG. 9, the section indicated by B is where the tape 6 pulled out from the cassette 3 starts to be wound around the rotary head drum 2. When the tape 6 is wound around the rotary head drum 2, the rotation of the rotary head drum 2 easily causes the tape 6 to loosen or flutter. In order to prevent such a phenomenon, the back tension is changed. However, if the back tension is suddenly increased, excessive tension is momentarily applied to the tape, and there is a risk that the tape may be damaged. For this reason, as shown in FIG. 9B, the back tension is gradually changed to some extent before.

In section C, the supply side and winding side tape pull-out guides
When 10, 11 completes the movement, for reasons such as reel inertia,
After all tape slack is likely to occur. Therefore, the voltage applied to the loading motor is controlled so as to gradually reduce the speed to a level at which the generation of the slack can be prevented by the back tension in a range where the excessive tape tension is not applied. Similarly, when the moving bases 19 and 21 reach the predetermined positions, the back tension and the speed are controlled to prevent the tape from sagging or damage.

In section D, after the moving bases 19 and 21 are positioned at predetermined positions, they are pressed by a spring force. Therefore, it is necessary to transmit a driving force greater than the spring force to the loading rings 51 and 57. The applied voltage is increased. In this way, the moving bases 19 and 21 are positioned by pressure bonding, and when the sensor 101 detects the completion of the tape loading, the tape loading operation control is completed.

Next, control during the tape unloading operation will be described with reference to FIG. In the section indicated by A ', the moving bases 19 and 21 start to move. At this time, the response of the reel motor is controlled so as to prevent the tape from being too fast to be wound up and causing slack or falling off. In consideration of this, the moving speed and the additional back tension to the tape are set.

Also in the section B ', the tape back tension is set so as to prevent the tape from sagging due to the start of the movement of the tape pull-out guides 10, 11.

In section C ′, the loading motor applied voltage changes so as to increase the moving speed of the tape guides as much as possible in order to shorten the tape unloading time.

In the section D ′, the tape 6 is unwound around the rotary head drum 2 and stored in the cassette 3. Here, however, since the winding amount ratio of the tape 6 changes greatly again,
The tape 6 is likely to be slackened or dropped. In order to prevent this, the moving speed of the tape guides is set to be slow again.

The tape unloading operation as described above is completed when the unloading completion is detected by the sensor 102.
Further, in the case of a magnetic recording / reproducing apparatus in which cassettes of different sizes are used in the same apparatus, as shown in FIG. 12, according to a signal from the cassette size detector 110, FIG. 13 and FIG. As shown, by changing the control set value, it is possible to prevent the occurrence of tape damage.

〔The invention's effect〕

According to the present invention, it is possible to control the moving speed of the tape guides and the additional back tension to the tape according to the tape winding amount during the tape loading and the tape unloading. Thus, the tape damage can be prevented, and the reliability can be improved.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of an embodiment of the present invention, and FIGS.
FIG. 4 is a plan view of the entire machine configuration, FIGS. 5, 6, and 8.
9 and FIG. 9 are explanatory diagrams of the mechanism operation, and FIG. 7 is a sectional view taken along line XX in FIG. FIG. 10 is a control explanatory diagram during a tape loading operation, FIG. 11 is a control explanatory diagram during a tape unloading operation, FIG. 12 is a system configuration diagram of another embodiment of the present invention, and FIG. Figures and No.
FIG. 14 is an explanatory diagram of the control operation. 100 ... microcomputer, 101 ... loading completion sensor, 102
…… Unloading completion sensor, 103… Phase detector (potentiometer), 104 …… Supply side reel motor, 105
…… Take-up reel motor, 106 …… Loading motor, 1
10 ... Cassette size detector.

Continuation of front page (56) References JP-A-61-168167 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 15/665

Claims (4)

(57) [Claims] A tape guide for forming a tape running path; a loading motor for driving a tape loading mechanism for drawing or storing a tape from a cassette by the tape guide; a phase detector for detecting an operation phase of the tape loading mechanism; A reel motor for adding back tension to the tape,
When the tape is loaded, the tape is supplied to the rotary head drum more than the drive voltage to the loading motor in a first section before the tape is pulled out by the tape guide and wound around the rotary head drum. The driving voltage to the loading motor in a second section from the start of winding to the completion of the movement of the tape guide is set to be lower than the driving voltage to the reel motor in the first section. A tape loading device in a magnetic recording / reproducing device, wherein a drive voltage to the reel motor in a section is set high. 2. A tape guide for forming a tape running path, a loading motor for driving a tape loading mechanism for drawing or storing a tape from a cassette by the tape guide, a phase detector for detecting an operation phase of the tape loading mechanism, A reel motor for adding back tension to the tape,
During tape unloading, the driving voltage to the reel motor in the third section before the tape guide moves is higher than the drive voltage to the reel motor in the fourth section in which the tape guide moves and stores the tape. A tape loading device in a magnetic recording / reproducing device, wherein a driving voltage to a reel motor is set low. 3. A tape loading device in a magnetic recording / reproducing apparatus according to claim 1, further comprising a cassette size detecting means for detecting a size of a cassette to be used, wherein said tape size is detected by said cassette size detecting means during tape loading. If the cassette size is large,
A tape loading device in a magnetic recording / reproducing apparatus, wherein a drive voltage to the reel motor in the second and subsequent sections is set high. 4. A tape loading device in a magnetic recording / reproducing apparatus according to claim 2, further comprising a cassette size detecting means for detecting a size of a cassette to be used, wherein the tape size is detected by the cassette size detecting means at the time of tape unloading. The tape loading device in the magnetic recording / reproducing apparatus, wherein when the size of the cassette is large, the drive voltage to the reel motor is set high in the third section and the fourth section.