JPH07296468A - Tape loading device - Google Patents

Abstract

(57) [Summary] [Purpose] To simplify the manual operation of unloading. [Structure] An operating shaft 104 for connecting / disconnecting a tape winding drive mechanism 75 and a loading / unloading drive mechanism 53 by connecting / disconnecting the drive shaft 51.
Is configured by an operation shaft that drives the tape winding drive mechanism 75 and the loading / unloading drive mechanism 53 by reciprocating in the axial direction, connecting / disconnecting to / from the drive shaft 51, and rotating in the circumferential direction in the connected state. did. Therefore, the loading / unloading drive mechanism 53 and the tape winding drive mechanism 75 can be simultaneously driven to perform the unloading operation of the movable tape guides 10 and 11 and the unloading operation of the magnetic tape 1 all at once. The number of operations during the unloading operation can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape loading apparatus suitable for use in a magnetic recording / reproducing apparatus such as a video tape recorder.

[0002]

2. Description of the Related Art For example, a video tape recorder (hereinafter referred to as
It is called "VTR". The U-loading method and the M-loading method are known as the loading method of 1). Among them, the M-loading method is widely used because the loading mechanism can be simplified.

Conventionally, there is a tape loading device of the M loading type of this type, which has a capstan roller as shown in FIG.

The tape loading of this tape loading device will be described with reference to FIG.

First, the magnetic tape 1 is loaded on the video tape cassette 4 wound around the outer periphery of the supply reel 2 and the take-up reel 3 as shown by the chain double-dashed line, and then the loading / unloading motor 5 is operated. The movable tape guides 10, 1 of the sliders 8, 9 are rotated by the rotation of the worm gear 6 and the worm wheel 7 by driving.
1 (vertical guides 10a, 11a and inclined guides 10b, 1
1b) is pulled out from inside the video tape cassette 4 to the left and right side positions of the rotary head drum 12 in the direction indicated by the arrow a, and the magnetic tape 1 is spirally formed on the outer peripheral surface of the rotary head drum 12 at a predetermined winding angle. Wrap around.

Almost at the same time, the tension arms 13, 1
4, the tension regulators 15 and 16 are pulled out from the inside of the video tape cassette 4 to the left and right side positions in the direction indicated by the arrow b so that the supply side 1a of the magnetic tape 1 is the full width between the supply side vertical guide 10a and the fixed tape guide 17. The magnetic tape 1 is guided to the fixed head 18 such as an erasing head, and the winding side 1b of the magnetic tape 1 is guided to the vertical guide 1 as indicated by a chain line.
Guide between 1a and the fixed tape guide 19.

At this time, the take-up side 1b of the magnetic tape 1 is pulled out in the direction indicated by the arrow b by passing it above the capstan roller 20 located below the tape pulling path.

Next, the capstan roller 20 is vertically moved to the same height as the height of the winding side 1b of the magnetic tape 1, and the capstan roller 20 is wound to wind the magnetic tape 1 as indicated by a two-dot chain line. Insert it inside the tape path on side 1b.

Thereafter, the capstan roller 20 is horizontally rotated in the direction indicated by the arrow c from the backward movement position indicated by the chain double-dashed line to the forward movement position indicated by the solid line about the rotation center shaft 21. The capstan roller 20 is positioned at the position.

At this time, as shown by the solid line, the capstan roller 20 is attached to the winding side 1b of the magnetic tape 1 from the inside by the arrow c.
The winding side 1b of the magnetic tape 1 is guided between the vertical guide 11a and the fixed tape guide 19 in a U-shape in a plan view so that the winding side 1b of the magnetic tape 1 is voice-erased. The magnetic tape 1 is wound around a fixed head 22 such as a head, an audio recording / playback head, a confidence head, and a fixed tape guide 23, and the winding side 1b of the magnetic tape 1 is wound around the outer peripheral surface of the capstan roller 20 itself at a predetermined winding angle. The tape loading operation ends.

In this way, the VTR tape loading operation is performed.

Thereafter, the capstan roller 20 is rotated clockwise by the capstan motor 24, and the supply reel motor 25 and the take-up reel motor 26 rotate the supply reel 2 and the take-up reel 3, respectively. The magnetic tape 1 is driven to run at a constant speed from the supply reel 2 to the take-up reel 3, and the video signal of the magnetic tape 1 is recorded / reproduced by the rotary head drum 12.

Numerals 27 and 28 are reel brakes capable of braking / releasing the reel brake drums 29, 30, 31 and 32 are tension coil springs for imparting rotational force to the reel brakes 27, 28 in the drum braking direction, Numerals 33 and 34 are electromagnetic solenoids for applying a turning force in the drum brake releasing direction to each reel brake 27, 28.

By the way, in this kind of tape loading device, when the unloading is carried out when an abnormality occurs or the power is turned off, the movable tape guides 10 and 11 are unloaded by manually operating the loading / unloading motor 5 and the reel motors 25 and 26. This is performed by moving the magnetic tape 1 to the loading position and storing the magnetic tape 1 in the video tape cassette 4.

[0015]

However, the conventional tape loading apparatus does not have a mechanism for driving the loading / unloading motor 5 and the reel motors 25 and 26 at the same time. Therefore, the manual unloading operation is performed. At the same time, the unloading operation of the movable tape guides 10 and 11 and the unloading operation of the magnetic tape 1 were performed separately. As a result, there is a problem in that the number of operations during the manual unloading operation increases, and the manual unloading operation becomes complicated.

Further, since the magnetic tape 1 does not have a function of managing the tension of the magnetic tape 1, it is necessary to manually control the tape tension when the magnetic tape 1 is stored (winded) in the video tape cassette 4. There is also a problem that the magnetic tape 1 is easily damaged.

The present invention has been made in view of the above circumstances, and provides a tape loading device capable of reducing the number of manual unloading operations and thus facilitating manual unloading operations. It is provided.

Another aspect of the present invention (claim 3) is a tape loading device capable of automatically controlling the tape tension during winding of the tape and suppressing the occurrence of tape damage during winding of the tape. It is provided.

Another aspect of the present invention (claim 4) is to provide a tape loading device in which the tape winding speed is higher than the tape slackening speed and the slackening of the magnetic tape can be prevented during a manual unloading operation. To do.

[0020]

SUMMARY OF THE INVENTION A tape loading device according to the present invention comprises a drive shaft which is rotated by the driving of a loading / unloading motor, and a movable shaft which is connected to the drive shaft and is movable between a loading position and an unloading position. A loading / unloading drive mechanism that applies a driving force to the tape guide, and a tape winding mechanism that drives the reel gear in the tape winding direction by selectively interlocking with the driving operation of the loading / unloading drive mechanism. A drive mechanism and an operation shaft for connecting / disconnecting the tape winding drive mechanism and the loading / unloading drive mechanism by connecting / disconnecting to / from the drive shaft,
This operating shaft is configured by an operating shaft that drives the tape winding drive mechanism and the loading / unloading drive mechanism by reciprocating in the axial direction, connecting / disconnecting to / from the drive shaft, and rotating in the circumferential direction in the connected state. It was done.

In a tape loading device according to another invention (claim 3) of the present invention, the reel gear is provided on the reel motor shaft through a friction material.

According to another aspect of the present invention (claim 4), a tape loading device reduces the reduction ratio between the operation shaft and the tape winding drive mechanism to be smaller than the reduction ratio between the operation shaft and the loading / unloading drive mechanism. It is set to the ratio.

[0023]

In the present invention, the operating shaft is connected to the drive shaft and is rotated in the unloading direction to simultaneously drive the loading / unloading drive mechanism and the tape winding drive mechanism to unload the movable tape guide. The operation and the unloading operation of the magnetic tape are performed at once.

In another aspect of the present invention (claim 3), a constant torque is transmitted from the reel gear to the reel motor shaft during a manual unloading operation.

According to another aspect of the present invention (claim 4), the rotation speed of the reel gear becomes higher than the movement speed of the movable tape guide during the manual unloading operation.

[0026]

Embodiments of the present invention will be described in detail below with reference to embodiments shown in the drawings.

FIG. 1 is a plan view showing the entire tape loading device according to the present invention, FIG. 2 is a plan view showing the essential parts of the tape loading device according to the present invention, and FIG.
4A and 4B are a plan view and a sectional view showing a state before switching the manual drive system of the tape loading device according to the present invention, and FIG.
(A) And (B) is the top view and sectional drawing which show the state after the manual drive system switching of the tape loading apparatus in this invention,
5 is an exploded perspective view showing a tape winding drive mechanism of a tape loading device according to the present invention, FIG. 6 is a sectional view taken along the line AA of FIG. 2, and the same members as in FIG. Will be assigned and the detailed description will be omitted.

In the figure, reference numeral 51 designates a drive shaft which is rotated by the driving of the loading / unloading motor 5, and a first worm gear 51a having an axis line extending in the front-rear direction and the first worm gear 51.
The second worm gear 51b is connected to a via a joint 52, and is rotatably provided on a VTR chassis (not shown).

Worm gears 51a, 5 of the drive shaft 51
1b is formed by a worm gear whose traveling directions are different from each other.

Further, these worm gears 51a, 51b
Are formed by worm gears having different lead angles. That is, the lead angle γ ₁ of the first worm gear 51a and the lead angle γ of the second worm gear 51b.
₂ is set to an angle that satisfies the inequalities of γ ₁ <μ / cos α and γ ₂ > μ / cos α (μ and α are the friction coefficient and the pressure angle, respectively).

Reference numeral 53 denotes a loading / unloading drive mechanism having a worm wheel 53a which meshes with the first worm gear 51a. The loading / unloading drive mechanism 53 is provided at the left side position of the loading / unloading motor 5 and is rotated by the rotation of the drive shaft 51. A driving force is applied to the movable tape guides 10 and 11 which can be driven to move between the loading position and the unloading position.

Reference numeral 54 denotes a mounting plate having a substantially rectangular shape in plan view, which comprises a base piece 54a extending in the left-right direction and two side pieces 54b, 54c projecting to both sides of the base piece 54a.
It is fixed to the right side of the front edge of the chassis (not shown).

A pin attachment piece 55 projecting upward is bent and formed on the right side of the rear edge of the base piece 54a, and a first pivot portion projecting rearward is formed at the upper end portion of the pin attachment piece 55. A support pin 56 is attached.

An L-shaped spring engaging piece 57 is formed by bending a vertical portion 57a projecting upward and a horizontal portion 57b projecting forward of the vertical portion 57a at a substantially central portion of the rear end edge of the base piece 54a. The horizontal portion 57b of the spring locking piece 57 is provided with a through hole 58 that opens in the vertical direction.

Further, in the vicinity of the spring locking piece 57 of the base piece 54a, a long hole 59 for restricting rotation of a swing arm described later is provided.

A second pivot support pin 60 protruding downward is attached to the right side of the rear end edge of the base piece 54a, and the second pivot support pin 60 is attached to the left side of the rear end edge.
A third pivot pin 61 and a fourth pivot pin 62 are attached in parallel with each other.

On the other hand, the left side piece 54b of the both side pieces 54b, 54c is provided with a screw insertion hole 63 which is an elongated hole opened in the vertical direction.

At the rear end edge of the right side piece 54c, an L-shaped shaft mounting piece 64 consisting of a vertical portion 64a protruding downward and a horizontal portion 64b protruding backward is formed by bending. A stepped shaft 65 protruding upward is attached to the horizontal portion 64 b of the shaft attachment piece 64.

Further, the right side piece 54c is provided with a screw insertion hole 66 which is a round hole opened in the vertical direction.

67 is a reel motor shaft that is rotated by the drive of the take-up reel motor 26 of the reel motors 25 and 26, and is rotatably provided on the chassis (not shown).

At the lower end of the reel motor shaft 67, a fixed plate 68 and a spring receiver 69, which are arranged in parallel in the vertical direction at a predetermined interval, are mounted. A space between the fixed plate 68 and the spring receiver 69 serves as a reel gear. The limiter gear 70 of FIG.

Around the reel motor shaft 67, an annular friction member 71 interposed between the fixed plate 68 and the limiter gear 70 and a compression coil mounted between the limiter gear 70 and the spring receiver 69. A spring 72 is provided.

Reference numeral 73 denotes a motor rotor which constitutes the reel motor 26 together with a motor coil (not shown),
74 is a thrust washer that receives the elastic force of the compression coil spring 72.

Reference numeral 75 denotes a tape winding drive mechanism which is driven by being selectively interlocked with the driving operation of the loading / unloading drive mechanism 53 to give a rotational force in the tape winding direction to the limiter gear 70, which will be described later. A conversion lever 76 that rotates when the shaft reciprocates, a slide plate 77 that reciprocates by the rotation operation of the conversion lever 76, and the reel brake drum 30 can be braked and released by the reciprocating motion of the slide plate 77. Reel brake 7
8 and a driving force transmission mechanism 79 that applies a rotational force to the limiter gear 70 by rotating an operation shaft described later in a brake drum braking release state by the reel brake 78, and is provided below the mounting plate 54. Has been.

The conversion lever 76 of the tape winding drive mechanism 75 has a substantially I-shaped first arm portion 76a and a substantially U-shaped second arm portion 76b, and rotates about the first pivot pin 56. It is provided freely.

The slide plate 77 of the tape winding drive mechanism 75 is formed of a plastic plate which extends in the left-right direction and has a generally rectangular shape in plan view.

An operation piece 80 projecting rearward is integrally provided on the right side portion of the rear edge of the slide plate 77.
The operation piece 80 is opened in the vertical direction and is provided with the conversion lever 7
Lever engaging hole 8 formed of a square hole facing the first arm portion 76a of No. 6
0a is provided.

On the left side of the slide plate 77, there is integrally provided a rising piece 81 consisting of a vertical portion 81a protruding upward and a horizontal portion 81b protruding leftward. The portion 81b is provided with a control hole 82 which is formed of a pin insertion hole 82a extending in the left-right direction for restricting arm rotation and an arm rotation pin insertion hole 82b communicating with the pin insertion hole 82a.

Furthermore, a pin insertion hole 83a extending in the left-right direction for restricting the swing arm to rotate is provided substantially at the center of the slide plate 77 in the left-right direction (longitudinal direction), and a swing motion that communicates with the pin-insertion hole 83a. Pin insertion hole 83b for rotating the arm
The pin control hole 83 is formed, and the left side portion is integrally provided with a spring locking piece 84 protruding upward and corresponding to the spring locking piece 57 and having an inverted L-shaped cross section.

Guide holes 85-87 extending in the left-right direction and through which the pivot pins 60-62 are inserted are provided at the rear edge of the slide plate 77.

On the other hand, the reel brake 78 of the tape winding drive mechanism 75 is rotatably provided on the chassis (not shown) via a pin 88 and has a rotating arm 89 having a spring locking hole 89a. The rotating arm 89 is rotatably held via a brake holder 90 and is constituted by a brake material 91 which can be pressed into contact with the reel brake drum 30 on the winding side of the reel brake drums 29, 30.

Rotating arm 89 of this reel brake 78
An arm rotation restricting piece 92 having a pin 92a that faces the pin control hole 82 is provided in a protruding manner on the winding control side of the electromagnetic solenoids 33, 34.
The turning force is applied in the brake drum braking releasing direction, and the turning force in the braking drum braking direction is applied by the elastic force of the tension coil spring 32 on the winding side of the tension coil springs 31 and 32.

The drive force transmission mechanism 79 of the tape winding drive mechanism 75 is a gear pulley 93 having a gear portion 93a and a pulley portion 93b rotatably provided on the second pivot pin 60, and the gear pulley 93. And a swing arm 94 pivotally supported by the third pivot pin 61 on the left side of the and a pivot arm 94 provided below the swing arm 94 and pivotable by the third pivot pin 61. A pulley gear 96 having a pulley portion 96a and a gear portion 96b which are freely pivotally supported and receive the rotational force of the gear pulley 93 via a transmission belt 95, and a gear shaft 97 which is meshed with the pulley gear 96 and is mounted on the swing arm 94. And a swing gear 98 which is rotatably supported via a gear and is capable of meshing with the limiter gear 70, and is provided below the slide plate 77.

Of these, the swing arm 94 is a friction member 99 formed of an annular plate for generating a stable rotation loss torque.
Is built in, and by the reaction force of the friction torque generated by the friction material 99, the swing gear 98 moves the limiter gear 7
It is configured so that it can act as a swinging force in the direction of meshing with 0.

Further, on the gear pulley side of the swing arm 94, an arm rotation restricting piece 100 having a pin 100a which is inserted into the control hole 83 and faces the elongated hole 59 is integrally provided.

Incidentally, 101 is a compression coil spring for urging the oscillating gear 98 to the oscillating arm 94, and 102.
Is a thrust washer which receives the elastic force of the compression coil spring 101.

Further, 103 is the both spring locking pieces 5
It is a tension coil spring which is locked to 7, 84 and which gives the slide plate 77 a habit of returning.

Reference numeral 104 denotes a manual operation shaft, which is connected to each other and has two cylindrical bodies 105 and 106 arranged in parallel in the vertical direction.
And is provided around the shaft 65 so as to be rotatable and movable back and forth (reciprocating).

The operating shaft 104 reciprocates in the axial direction to be connected / disconnected to / from the drive shaft 51, and in the connected state, rotates in the circumferential direction so that the loading / discharging operation is performed.
The unloading drive mechanism 53 and the tape winding drive mechanism 75 can be driven.

The speed reduction ratio between the operation shaft 104 and the tape winding drive mechanism 75 is set to be smaller than the speed reduction ratio between the operation shaft 104 and the loading drive mechanism 53.

Further, both the cylinders 105 of the operating shaft 104,
The upper tubular body 105 of 106 is the conversion lever 76.
It is formed by a stepped bottomed cylinder including two large and small cylindrical portions 105a and 105b which are exposed to the second arm portion 76b and have different outer diameters.

The tubular portion 105a of the tubular body 105 is provided with a cross-shaped recessed groove 107 that opens to the upper end surface, and the tubular portion 105b is formed by notching the lower end edge at equal intervals in the circumferential direction. The uneven portion 108 is provided.

The cylindrical body 105 is interposed between the cylindrical portions 105a and 105b and the second arm portion 76b.
The worm gear 51b of the drive shaft 51, which is in contact with the tip of the
A worm wheel 109 capable of meshing with is integrally provided.

On the other hand, the lower tubular body 106 has two large and small tubular portions 1 through which the shaft 65 is inserted and the outer diameters of the respective tubes are different from each other.
It is formed by a stepped cylinder composed of 06a and 106b.

The tubular portion 106a of the tubular body 106 is provided with a concavo-convex portion 110 which is fitted in the concave portion 108 by notching the upper edge at equal intervals in the circumferential direction,
A transmission gear 111 that is spline-fitted to the gear portion 93a of the gear pulley 93 is integrally provided on the cylindrical portion 106b.

Further, in the cylindrical body 106, the stepped surface 106 interposed between the inner peripheral surfaces of the cylindrical portions 106a and 106b.
c is formed.

Reference numeral 112 denotes the drive shaft 51 and the operation shaft 10.
A compression coil spring having elastic force in the direction of releasing the connection state of No. 4 is elastically mounted between the stepped surface 106c of the cylindrical body 106 and the horizontal portion 64b of the shaft mounting piece 64.

The arm swing force of the swing arm 94 is adjusted and set by the friction material 99 and the compression coil spring 101, and the limiter torque of the limiter gear 70 is the friction material 71 and the compression coil spring. It is adjusted and set by 72.

In the figure, arrows A to K indicate the operating directions of the respective components, and reference numeral g is a gap formed between the reel brake drum 30 and the brake material 91 in the brake braking released state.

In the tape loading device thus constructed, the unloading operation of the movable tape guides 10 and 11 and the unloading of the magnetic tape 1 are performed by driving the loading / unloading drive mechanism 53 and the tape winding drive mechanism 75. The loading operation (tape winding operation) will be described with reference to FIGS.

That is, the operation shaft 104 is operated to move downward against the elastic force of the compression coil spring 112, and then the operation shaft 104 is rotated in the unloading direction.

At this time, the worm wheel 109 is displaced downward by the operation shaft 104 moving in the direction indicated by the arrow A, and the worm wheel 109 meshes with the second worm gear 51b of the drive shaft 51 to load and unload. The loading drive mechanism 53 and the tape winding drive mechanism 75 are connected.

Further, the forward movement of the operating shaft 104 causes the worm gear 109 to rotate the conversion lever 76 in the direction indicated by the arrow B, and the rotation of the conversion lever 76 causes the slide plate 77 to repel the tension coil spring 103. It moves forward in the direction indicated by the arrow C against the force to move the arm rotation restricting piece 92.
Pin 92a of the control hole 82 faces the pin insertion hole 82a of the control hole 82, and the rotation arm 89 of the reel brake 78 rotates about the pin 88 in the direction indicated by the arrow D (the brake drum braking release direction by the reel brake 78). Brake material 91
Is separated from the reel drum 30 with a gap dimension g, the pin 100a of the arm rotation restricting piece 100 faces the pin insertion hole 83a of the control hole 83, and the swing arm 94 is moved to the third position.
It is possible to rotate about the pivot pin 61 in the direction indicated by the arrow E (the direction in which the swing gear 98 meshes with the limiter gear 70).

On the other hand, when the operating shaft 104 rotates in the direction indicated by the arrow F, the drive shaft 51 rotates in the direction indicated by the arrow G, and the first worm gear 5 is rotated by the rotation of the drive shaft 51.
The rotation of 1a causes the worm wheel 53a of the loading / unloading drive mechanism 53 to rotate in the direction indicated by the arrow H to move the movable tape guides 10 and 11 in the unloading direction, while the transmission gear 111 moves in the direction indicated by the arrow F. The driving force transmission mechanism 79 is driven and operated in the direction in which the swing gear 98 meshes with the limiter gear 70 by rotating.

In this case, the transmission gear 111 of the operating shaft 104
Rotates in the direction indicated by arrow F, the gear pulley 93
The rotation of the gear pulley 93 causes the transmission belt 95 to be driven in the direction indicated by arrow J.
The driving operation of the transmission belt 95 causes the pulley gear 96 to rotate in the direction indicated by the arrow K, and the rotating operation of the pulley gear 96 causes the swinging arm 94 to rotate around the third pivot pin 61 in the direction indicated by the arrow E. Oscillating gear 98
Meshes with the limiter gear 70.

In this manner, the movable tape guide 1 is driven by driving the loading / unloading drive mechanism 53.
The magnetic tape 1 can be unloaded by driving the tape winding drive mechanism 75 while unloading 0 and 11.

Thereafter, a cassette compartment driving motor (not shown) is manually driven to move the cassette compartment (not shown) in the ejecting direction, and then the video tape cassette 4 is transferred to the VTR.
Take it out.

Therefore, in this embodiment, by connecting the operating shaft 104 to the drive shaft 51 and manually rotating in the unloading direction, the loading / unloading mechanism 53 and the tape winding drive mechanism 75 are simultaneously driven. Thus, the unloading operation of the movable tape guides 10 and 11 and the winding operation of the magnetic tape 1 can be performed at once, so that the number of manual unloading operations can be reduced.

Further, in this embodiment, the limiter gear 70 is provided on the reel motor shaft 67 via the friction material 71, which means that the limiter gear 70 is fixed to the reel motor shaft 67 during the manual unloading operation. Since the torque can be transmitted, the tape tension can be automatically controlled when the magnetic tape 1 is stored in the video tape cassette 4.

Further, in this embodiment, the operating shaft 10
4 and the tape winding drive mechanism 75, the gear reduction ratio between the operation shaft 1
04 and the gear reduction ratio between the loading / unloading drive mechanism 53, the rotation speed of the limiter gear 70 becomes higher than the moving speed of the movable tape guides 10 and 11 during the manual unloading operation. The winding speed is higher than the tape slackening speed.

In this case, in order to wind the magnetic tape 1 without slack, it is necessary to set the reduction ratio so that the limiter gear 70 has a sufficiently high rotation speed with respect to the maximum tape slack speed even with the minimum reel diameter of the reel. is there.

Incidentally, there is a characteristic as shown in FIG. 7 (the vertical axis and the horizontal axis are the tape length and the unloading operation time) as the tape slack speed characteristic during unloading.

This is a peculiar characteristic obtained when the operation shaft 104 is unloaded and rotated at a constant speed and the magnetic tape 1 is not wound.

In this embodiment, the loading operation of the movable tape guides 10 and 11 and the loading operation (feeding-out operation) of the magnetic tape 1 can be simultaneously performed by a manual loading operation.

Further, in this embodiment, an example in which the loading / unloading drive mechanism 53 and the tape winding drive mechanism 75 are installed on the tape winding side has been shown, but the present invention is not limited to this, and the tape feeding is performed. There is no problem even if it is installed on the side.

Furthermore, in the present embodiment, an example in which the present invention is applied to a VTR is shown, but the present invention is not limited to this, and can be applied to other magnetic recording / reproducing devices as in the embodiment. is there.

[0087]

As described above, according to the present invention, the drive shaft which is rotated by the driving of the loading / unloading motor, and the movable tape guide which is connected to the drive shaft and is movable between the loading position and the unloading position. And a unloading drive mechanism for applying a driving force to the reel, and a tape winding drive mechanism for driving the reel gear in a tape winding direction by selectively interlocking with the driving operation of the loading / unloading drive mechanism. And an operation shaft for connecting / disconnecting the tape winding drive mechanism and the loading / unloading drive mechanism to / from the drive shaft by connecting / disconnecting the drive shaft.
It is composed of an operating shaft that drives the tape winding drive mechanism and the loading / unloading drive mechanism by reciprocating in the axial direction to connect / disconnect to / from the drive shaft and rotate in the circumferential direction in the connected state. By connecting the drive shaft to the drive shaft and manually rotating in the unloading direction, the loading / unloading drive mechanism and the tape winding drive mechanism are driven simultaneously to perform the unloading operation of the movable tape guide and the unloading operation of the magnetic tape. You can do it all at once.

Therefore, since the number of manual unloading operations can be reduced, the unloading manual operation can be easily performed.

In the third aspect, the reel gear is provided on the reel motor shaft through the friction material.
Since a constant torque can be transmitted from the reel gear to the reel motor shaft during manual unloading operation, the tape tension can be automatically controlled during tape winding, and the occurrence of tape damage during tape winding can be suppressed. be able to.

According to the present invention, the speed reduction ratio between the operation shaft and the tape winding drive mechanism is set to be smaller than the speed reduction ratio between the operation shaft and the loading / unloading drive mechanism. The rotation speed of the reel gear becomes higher than the movement speed of the movable tape guide.

Therefore, since the tape winding speed is higher than the tape slackening speed, it is possible to prevent the slackening of the magnetic tape during the manual unloading operation.

[Brief description of drawings]

FIG. 1 is a plan view showing an entire tape loading device according to the present invention.

FIG. 2 is a plan view showing a main part of the tape loading device according to the present invention.

3A and 3B are a plan view and a cross-sectional view showing a state before switching of the manual drive system of the tape loading device according to the present invention.

4A and 4B are a plan view and a cross-sectional view showing a state after switching the manual drive system of the tape loading device according to the present invention.

FIG. 5 is an exploded perspective view showing a tape winding drive mechanism of the tape loading device according to the present invention.

6 is a cross-sectional view taken along the line AA of FIG.

FIG. 7 is a tape slack velocity characteristic diagram showing the relationship between the tape length and the elapsed time during unloading of the tape loading device according to the present invention.

FIG. 8 is a plan view showing a conventional tape loading device.

[Explanation of symbols]

 5 ... Loading / unloading motors 10, 11 ... Movable tape guide 51 ... Drive shaft 53 ... Loading / unloading drive mechanism 70 ... Limiter gear 75 ... Tape winding drive mechanism 77 ... Slide plate 78 ... Reel brake 79 ... Driving force transmission Mechanism 94 ... Swing arm 98 ... Swing gear 104 ... Operation axis

Claims (4)

[Claims] 1. A driving shaft that is rotated by driving a loading / unloading motor, and a loading shaft that is connected to the driving shaft and that applies a driving force to a movable tape guide that is movable between a loading position and an unloading position.
An unloading drive mechanism, a tape winding drive mechanism that selectively drives in conjunction with the driving operation of the loading / unloading drive mechanism to apply a rotational force in the tape winding direction to the reel gear, and the tape winding drive mechanism And an operating shaft for connecting / disconnecting the loading / unloading drive mechanism to / from the drive shaft by connecting / disconnecting the drive shaft. The operating shaft is reciprocated in the axial direction to connect / disconnect to the drive shaft. In addition, the tape loading device is configured by an operation shaft that drives the tape winding drive mechanism and the loading / unloading drive mechanism by rotating in the circumferential direction in the connected state. 2. The tape winding drive mechanism includes a slide plate that reciprocates by reciprocating the operation shaft, a reel brake that can brake and release the reel gear by reciprocating the slide plate, and a brake release by the reel brake. A drive force transmission mechanism that applies a rotational force to the reel gear by rotating the operation shaft in a state, and the drive force transmission mechanism of the tape winding drive mechanism is connected to the drive shaft of the operation shaft. 2. The tape loading device according to claim 1, further comprising a swing gear that meshes with the reel gear by rotation of the tape. 3. The tape loading device according to claim 1, wherein the reel gear is provided on the reel motor shaft through a friction material. 4. The reduction ratio between the operation shaft and the tape winding drive mechanism is set to be smaller than the reduction ratio between the operation shaft and the loading / unloading drive mechanism. Tape loading device.