JPS6278760A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To load and unload a tape just with a single drive source and to simplify the constitution of a magnetic recording/reproducing device, by using a drive source and a means to transmit the motive power of the drive source to a tape loading/unloading mechanism. CONSTITUTION:When gears 94 and 96 are revolved clockwise with a shaft 97 on a chassis 10 defined as a fulcrum, a loading ring 47 and a gear 70 are revolved clockwise and counterclockwise respectively. Thus a tape is loaded. The revolution of a loading motor 110 drives a worm 104. The worm 104 engages a worm wheel 94 which is revolved round the shaft 97. Both gear 94 and 96 are also supported by the shaft 97 and the wheel 95 is revolved in a body with gears 94 and 96. Both the worm 104 and the motor 10 can turn relatively round the wheel 95 together with a support tool 103 with the shaft 97 defined as a fulcrum.

Description

[Detailed description of the invention] [Industrial application fields] The present invention relates to a magnetic recording/reproducing device.

[Prior Art] In the video tape recorder (hereinafter referred to as VTR) shown in FIG. 2, in the recording or playback mode, the tape 2 wound around the supply reel 3 in the tape cassette l passes through the guide 9 and passes through the back tension guide. 6, impedance roller 7, all erase head 8, guide II, rotation guide 1
2. Pass through the inclined guide 13 and enter the cylinder 5 with a rotating head. The tape 2 that comes out of the cylinder 5 is an inclined guide 14 and a rotating guide! 5. It passes through the audio head 18, the rotation guide 19, and enters the capstan 20 and the pinch roller 21. The tape 2 is driven at a constant speed by the capstan 20 and the pinch roller 21, and after leaving the capstan 20, the tape 2 enters the tape cassette l again and is wound onto the take-up reel 4.

As mentioned above, in the recording or playback mode of the VTR, the tape 2 is pulled out from the tape cassette I and placed in the cylinder 5.
In order to perform this action,
Back tension guide 6, guide ll, rotation guide 1
2. Inclined guide 13, inclined guide 14, rotating guide 15
, the pinch rollers 21 must be moved from inside the tape cassette l-1 to the outside. Each guide I 1
．． The guides 12 and 13 are installed on the artificial side moving base 16 and move along the grooves A of the guide rail 22 fixed to the sawmill lO.
It is erected on the I moving base 17 and moves along the groove opening of the guide rail 22. The state shown by the two-dot chain line in the figure is the state housed in the tape cassette l.

[Problems to be Solved by the Invention] In the VTr, so-called tape loading and unloading operations are required to pull out and store the tape from the tape cassette as described above. , take-up reel stand 25
It is necessary to perform operations such as applying a brake to the VTR, and the price, size, etc. of the VTR will be influenced by the means by which these operations are performed.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a magnetic recording and reproducing device that can simplify the configuration in which tape loading and unloading are performed using a single drive source. .

[Structure of the Invention] The magnetic recording and reproducing apparatus of the present invention pulls out a magnetic tape 2 from a tape cassette l via a tape loading mechanism, and transfers the magnetic tape 2 to a cylinder 5 having a rotating head.
A magnetic recording and reproducing apparatus that records and reproduces data by winding the tape around the tape is characterized by comprising one driving source and a driving force transmitting means for transmitting the power of the driving source to a tape loading mechanism.

[Example] In each figure, the same parts are given the same reference numerals.

In FIG. 1, the entrance side moving base 16 is supported by sandwiching the guide rail 22 between presser plates 16-a. The shaft 63 is connected to the link 51 and further connected to the shaft 64
and is connected to the metal fitting 52. The metal fitting 52 is the shaft 53.5
4 and is attached to a loading ring 47. The shafts 53 and 54 are engaged with the elongated holes 52-a and 52-b, and the metal fitting 52 is biased in one direction by a spring 55.

When loading is completed, the artificial side moving base 16 comes into contact with the stopper 100 and stops, but the loading ring 47 is further displaced slightly, and the shafts 53, 54
are separated from the ends of the elongated holes 52-a and 52-b, respectively,
The force of the spring 55 is applied to the shaft 63, and this force presses the entrance side moving base 16 against the stopper 100.

On the other hand, the exit side moving base 17 also has a guide rail 2.
3 and connected to a link 61 by a shaft 62, and further connected by a shaft 65 to a lever 66 that rotates around a shaft 67 mounted on the chassis 10. The shaft 68 at the other end of the lever 66 engages with a link 69 through a slot 68a, and the link 69 is biased toward one of the slots by a spring 92. The link 69 is connected to a gear 70 by a shaft 72 at one end, and when the gear 70 rotates counterclockwise about the shaft 71 on the steering wheel 0, the lever 66 rotates clockwise, and the exit Move the side moving base 17. When the rope ink is completed, the exit side moving base 17 comes into contact with a stopper lot on the guide rail and stops. At this time, as shown in FIG. 3, the shaft 68 is separated from one end of the long hole in the long hole of the link 69, and the spring 92
The force continues to bias the lever 66 clockwise.

The loading ring 47 for driving the artificial side moving base 16 and the gear 70 for driving the exit 1 moving base 17 are connected via a gear 50, a gear 94, and a gear 96 that is coaxial with the gear 94 and rotates together. and are rotated in synchronization with each other.

FIG. 1 shows the stopped state. From this state, when the gears 94 and 96 rotate clockwise around the shaft 97 on the chassis, the loading ring 47 rotates clockwise and the gear 70 rotates counterclockwise. Rotate to perform loading operation.

Next, a brake mechanism for the reel stand will be explained.

In the stop state, as shown in FIG.
A supply brake 81 that rotates about a shaft 83 on a sawhorse is attached to the winding reel stand 25, and a take-up brake 82 that rotates about a shaft 84 that rotates about a shaft 84 is pressed by a spring 87 to the take-up reel stand 25. A slide 79 is engaged with the supply brake 81 via a shaft 85, and a long hole 79a of this slide 79 is fitted into a shaft 88 installed in the chassis IO, so that the slide 79 is free in the longitudinal direction. It is supported so that it can be moved. On the other hand, a slide 80 is similarly connected to the winding brake 82 via a shaft 86.
is supported by a shaft 89 so as to be freely movable in the longitudinal direction.

Each of these slides 79 and 80 has a foot 90 at the other end.
, 9+ are planted, and these are placed on logic slide 7.
By pressing the cam parts C, 2, and E of 3,
The brake can now be released.

The logic slide 73 is supported by an elongated hole so that it can be displaced laterally by a shaft 42.60 installed in the chassis 10.

FIG. 4 shows a loading motor and a speed reduction device for performing these operations.

The rotation of the loading motor 110 drives the worm 104 via the pulley l11 and the belt 108. The worm 104 is engaged with a worm wheel 95 centered on a shaft 97 mounted on the chassis IO. The gears 94 and 96 mentioned above are also supported by the shaft 97, and the gears 95 and 96 are also supported by the shaft 97.
4.96 rotates as a unit. Further, a motor 110° and a support 103 to which a worm 104 is attached are rotatably supported on the shaft 97.

Therefore, the worm 104 and the motor 110
3, the shaft 97 can be used as a fulcrum and can be relatively rotated around a worm wheel 95. As shown in FIG. 1, a link 107 is connected to the support 103 via a shaft 106, and a lever 7 is connected via a shaft 109.
It continues on to 4.

The lever 74 is connected to the logic slide 73 on the other hand by a shaft 75, and is rotatable about a shaft 76 mounted on the chassis 10 as a fulcrum.

Next, the operation in each mode will be explained. First, in order to shift to the recording or reproducing mode, the motor 110 rotates in the normal direction, and the frame 104 rotates in the normal direction.

As a result, the worm wheel 95 attempts to rotate clockwise. However, since the stopper shaft 56 installed on the loading ring 47 is engaged with the loop portion of the unloading detection slide 57, the unloading detection slide 57 tries to move forward, but the other end Since the tip portion is in contact with the shaft 78 installed on the logic slide 73, the loading ring 47 and
0, the worm wheel 95 cannot rotate and remains stopped. Therefore, the driving force of the worm +04 rotates the support 103 counterclockwise about the shaft 97. This rotation displaces the link 107 rearward via the shaft 106 and rotates the lever 74 counterclockwise. Therefore, the logic slide 73 is displaced to the left, and the shaft 78 is removed from the chi portion. In this state, the cam part E slides 79.80
moves in the direction of the arrow, the supply brake 81 is released, and the shaft 77 comes into contact with the loading portion of the loading detection slide 40, stopping the movement of the logic slide 73. At the same time, the loading ring 47 is unlocked, so the worm wheel 95 begins to rotate, and the loading ring 47 is unlocked.
, the gear 70 rotates and the aforementioned loading operation begins.

Immediately before the loading is completed, the shaft 56 of the loading ring 47 engages with the lower part of the loading detection slide 40, displacing the loading detection slide 40 rearward.

As a result, the square hole force of the loading detection slide 40 is also displaced rearward, so that the back tension lever 31
Due to the force of the spring 39 applied to 2, the shaft 32 is rotated counterclockwise about the shaft 32 as a fulcrum. The levers 4 and 1 to which the erasing head 8 is attached are biased counterclockwise by a spring 45, and a roller 99 whose rotational axis is a shaft 98 mounted on the lever 44 moves the loading detection slide. 40 and is stopped, but as the loading detection slide 40 moves backward fl'L, it rotates counterclockwise along the inclined portion YO.

When loading is completed, the lever 44 is
The tip of the roller contacts the base of the impingement roller 7,
It is set in the specified position. Further, the hack tension lever 31 comes into contact with the brake band mounting shaft 34, and is attached to the brake band 3 through the joint 35 by the force of the spring 39.
7 to apply a braking force to the supply reel stand 24.

Further, when loading is completed, the loading detection slide 40 is displaced to the limit of the elongated hole of the support part, and the shaft 41.4
Since it is stopped by 2, the loading ring 47
cannot rotate any further.

At this point, the shaft 77 of the logic slide 73 is removed from the mounting portion of the loading detection slide 40, so the support 103 is rotated counterclockwise again by the rotational force of the worm +04, displacing the logic slide 73 to the left. At this time, the winding brake 82 is released by the cam portion 2 of the logic slide 73. Then, the state shown in FIG. 3 is reached.

From this state, the cylinder 5 is rotated counterclockwise, and the capstan 2
0 is counterclockwise, and the take-up reel stand 25 is rotated clockwise to enter the recording/reproducing mode.

From the recording/playback mode, the loading motor +
10 rotates, the loading ring 47 does not rotate, so the logic slide 73 moves to the left and pushes the rear part of the brake band support lever 33 to push back the brake band attachment shaft 34 and loosen the brake band 37. In this state, when the supply reel stand 24 rotates counterclockwise and the capstan 20 begins to rotate clockwise, the rewind playback mode is entered.

Next, the fast forward and rewind modes will be described. When the loading motor 110 is reversed from the stopped state shown in FIG. 1, the worm wheel 95 attempts to rotate counterclockwise. However, since the stopper shaft 56 on the loading ring 47 is locked by the unloading detection slide 57, it cannot rotate, and the reaction force causes the worm 10 to rotate.
4. The support +03 rotates clockwise. Therefore, the link 107 is displaced forward, and the logic slide 73 is displaced rightward via the lever 74, as shown in FIG. In this state, the supply brake 81 and the take-up rebrake 82 are released by the cam portion of the logic slide 73. Here, if the supply reel stand 24 is driven counterclockwise, the rewind mode is set, and if the take-up reel stand 25 is driven clockwise, the fast forward mode is set.

7 to 9 show other embodiments of the invention. The slide 200 has two shafts 2 installed therein.
Pulleys 203 and 204 are attached to 01 and 202,
A timing belt 205 is stretched between these two pulleys with the tooth forming portion facing outward. The slide 200 has two shafts 2 installed on the Sharn IO.
06.207 are engaged and supported by elongated holes so that they can be displaced in the longitudinal direction. Stretched timing belt 20
3 is meshed with gear 95, and the other side is meshed with relay gear 209 driven by loading motor 208.

Therefore, when the slide 200 is fixed and the gear 95 can freely rotate, the rotation of the loading motor 208 is caused by the worm 210. Worm wheel 2II, relay gear 209
, rotate the timing belt 205, and turn the pulley 20.
3. Rotate gear 95 together with 204.

On the other hand, when the rotation of the gear 95 is locked, a reaction force is transmitted to the slide 200 via the pulleys 203, 204 or the lever 201 of 112 or the pulley 202, and attempts to displace it.

This force is transmitted to the link 107 and the shaft 109 via the shaft 106 mounted on the slide 200, and tries to rotate the lever 74 about the shaft 76 mounted on the chassis.

Next, the operation depending on the mode will be explained. First, to move to recording or playback mode, the loading motor 20
8 rotates forward, worm 210, worm wheel 211
, the relay gear 209, and the timing belt 205, the gear 95 attempts to rotate clockwise. However, since the stopper shaft 56 mounted on the loading ring 47 is engaged with the loop portion of the unloading detection slide 57, the unloading detection slide 57
7 tries to move forward, but the loading ring 47, gear 50, and gear 95 cannot rotate because the tip at the other end is in contact with the shaft 78 mounted on the logic slide 73, so they remain stopped. . Therefore, relay gear 20
The clockwise rotational force of 9 attempts to displace the shaft 202 of the pulley 204 rearward via the timing belt 205,
The slide 200 and link 107 are displaced rearward, and the lever 74 is rotated counterclockwise. Therefore, the logic slide 73 is displaced to the left, and the shaft 78 is removed from the chi portion.

The supply brake 81 is released by the cam part E, and the shaft 77 comes into contact with the 9 part of the loading detection slide 40, and the movement of the logic slide 73 is stopped. At the same time, the loading ring 47 is unlocked, so the gear 95 starts rotating, the loading ring 47 and the gear 70 rotate, and the above-described loading operation starts. Just before loading is completed, loading ring 47
The shaft 56 engages with the lower part of the loading detection slide 40 and displaces the loading detection slide 40 rearward.

Operations such as play mode and fast forward mode are similar to those shown in the embodiment of FIG.

[Effects of the Invention] As described in detail above, the present invention provides a magnetic recording and reproducing device that pulls out a tape from a tape cassette and winds it around a cylinder to perform recording and reproducing. Since this driving force is used to drive various parts of the loading mechanism via the transmission mechanism, only one driving source is required, which is effective in saving space and downsizing the magnetic recording/reproducing apparatus.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a plan view showing a conventional example of a magnetic recording/reproducing device, and Figs. 3 and 5 show the operating state of the embodiment of Fig. 1. 4 is a partial front view showing the driving portion of the tape loading mechanism in the embodiment shown in FIG. 1; FIG. 6 is a sectional view showing the vicinity of the loading ring used in the embodiment shown in FIG. 1; FIG. 9 to 9 are plan views showing other embodiments of the present invention, and FIG.
FIG. 0 is a perspective view of the drive portion for the tape loading mechanism used in the embodiment of FIG. 7. ■...Tape cassette, 2...Tape, 3...
Supply reel, 5... Cylinder, 17... Moving base, 47... Loading ring, 95... Worm wheel, 104... Worm, 110... Motor, 200...
... Slide, 205 ... Timing belt, 208
...Loading motor, 210...Worm, 21+...Worm wheel.

Claims (1)

[Claims] (1) In a magnetic recording and reproducing device that performs recording and reproducing by pulling out a magnetic tape 2 from a tape cassette 1 via a tape loading mechanism and winding the magnetic tape 2 around a cylinder 5 having a rotating head, one drive source and A magnetic recording and reproducing apparatus comprising: a driving force transmitting means for transmitting the power of the driving source to a tape loading mechanism.