JPH011146A - Recording/playback device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a recording and reproducing apparatus, such as a video tape recorder, which uses a cassette containing a magnetic tape to record or reproduce all signals, or to perform all recording and reproduction. .

BACKGROUND OF THE INVENTION In recent years, recording/reproducing devices such as video tape recorders have become increasingly smaller, lighter, and cheaper, and in response to these trends, operating mode setting systems and tape ejecting operating systems have been developed.

In conventional recording and reproducing devices, a single capstan motor is used to set the operating mode and pull out the tape, or the capstan motor is dedicated to driving the tape.
Some devices used separate motors to both set the operating mode and pull out the tape.

Problems to be Solved by the Invention However, in the conventional configuration described above, when multiple operations are performed using only the capstan motor, tape flow occurs due to inertia when the tape changes from forward playback to reverse playback, resulting in poor response. will be delayed. Furthermore, when a single motor is used to perform both the tape drawing operation and the operation mode setting, a motor with a large torque is required, resulting in the problem that the motor becomes large and heavy.

The present invention is intended to solve the above-mentioned conventional problems, and has as its overall object to provide a recording/reproducing device that has a long operational response and is lightweight.

Means for Solving the Problems In order to achieve the above object, the recording and reproducing apparatus of the present invention includes a tape pulling means for pulling out a tape from a cassette, winding it around a rotating head drum at a predetermined angle, and then winding the tape back into the cassette; an operation mode setting means for fully controlling the tape extraction means and selecting and setting an operation mode; and a first operation mode setting means for respectively driving the tape extraction means and the operation mode setting means. The operation modes of the second motor, the tape drawing means, and the operation mode setting means are detected respectively. The motor has a configuration including a position detection means for outputting a control signal to the second motor.

Effect With the above configuration, since the operation mode setting operation and the tape pull-out operation are performed by the first and second two motors, the responsiveness of the tape drive operation can be increased, and the tape drive operation that requires large torque can be improved. Since the pulling operation is performed by a motor different from the motor for setting the operation mode, a small motor with low torque can be used as the motor for setting the operation mode.

Embodiment Hereinafter, a recording and reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic plan view of a mode setting mechanism of a recording/reproducing apparatus according to an embodiment of the present invention. It has a configuration in which both the mode motor 1 and the capstan motor 16 are used to set each mode such as stop, fast forward, recording, and playback.

First, referring to FIG. 2, the configuration of the main parts moved by the mode motor 1 will be explained.

A gear 2 is integrally attached to a rotating shaft of the mode motor 1, and rotation is transmitted to a gear 3 that meshes with the mode motor 1.

The gear 3 is integrated with the worm gear 4, and rotation is transmitted to the worm wheel 6 while changing the direction. gear 2
, 3.4, the rotation of the mode motor 1 is converted to an appropriate rotation and deceleration controlled. The worm wheel 6 rotates together with the drive gear 6. A pin 7 is screwed into the drive gear 6.
are screwed together, and the screwed pin 7 is connected to the mode motor 1.
It is guided by the guide groove 8' of the holding plate 8 of the gears 3, 4.6, and moves linearly in the direction of arrow -A' according to the rotational direction of the mode motor 1. The screw pin 7 is connected to the main rod 9
By rotating the mode motor 1, the V main rod 9 is moved in the 5' direction.

In FIG. 2, the screw pin 7 has been moved to the stop mode position, and the screw pin 7' and the main rod 9 have been moved to the recording/playback mode position. As the main rod 9 moves, a cam surface formed on the main rod 9 moves the brake, tension arm, pinch roller (not shown), etc. to set the necessary state for each mode.

Detection of each mode position is performed by an electrical signal generated by the mode switch 12. There is a gear 14 on the mode switch 12 that meshes with the main rod 9, which rotates when the main rod 90 moves in the A' direction, and a foil formed on the mode switch 12 corresponding to each mode position. 47 (FIG. 10) and a brush (not shown) that rotates integrally with the gear 14, an electric signal is entirely generated. This is fed to the drive circuit of motor 1 in all modes,
The mode motor 1 is rotated and stopped to maintain each mode position.

Next, we will explain the tape pull-out operation in which the tape (not shown) in the cassette is pulled out and wrapped around a rotating head drum (not shown) at a predetermined angle, and the rewinding operation in which the tape is rewound into the cassette again. When the capstan motor 16 rotates, the capstan pulley 16' rotates together.

This rotation is transmitted to the center boot I718 via the belt 17. There is a gear 19 that rotates integrally with the center pulley 18, and the rotation of this gear 19 is controlled by a gear 20.
Gear 21. Gear 22, gear 46 and clutch gear 23
The mode gear 24 is decelerated through the sector gear 26.
It is transmitted to. The sector gear 25 rotates the meshing T loading gear 29 about a shaft 29' mounted on the chassis φ (FIG. 6). The arm 31 is held in engagement with the T loading gear 29 so as to rotate about a shaft 29'. The arm 32 rotates around the entire center of the bottle 31' set on the arm 31, and the other end of the arm 32 is rotatably held by the bottle 26' set on the T-shaft holder 26'. At the tape rewinding completion position, the shaft holder 26 pulls out the tape along a guide groove (not shown) by rotation of the T loading gear 29, and is held at the position 26' after the drawing operation is completed.

At the same time, the S loading gear 30 meshes with the T loading gear 29 and rotates. The arm 33 is engaged with the S loading gear 3o and is held so as to rotate about a shaft 30' mounted on the chassis φ (FIG. 6). Arm 34. The arm 36 is the bottle 3 that is planted on the arm 33.
3', the arm 33. It is connected to the S1 shaft holder 27'. The arm 34 can rotate around the pin 33'f and around the pin 36', and the arm 35 can rotate around the pin 27'.
It can be rotated around. The arm 36 is rotatable about the bin 36' and is movable along the elongated hole 36' within the range of the elongated hole 36'. The S2 shaft holder 28' is connected to the arm 36 by a pin 28' that is set up on the S2 shaft holder 28'. arm 36
is rotatable about the bin 28' as a fulcrum. S1 shaft holders 27 and 5 in the tape retraction completed state position
The two shaft holders 28 are moved into respective guide grooves (not shown) by the rotation of the S loading gear 3o, and the tape is completely drawn out at positions 27' and 28', respectively.

Therefore, by rotating the capstan motor 16, the T-shaft holders 26, 31, 27, 52 and 28 are moved to 26', 2, respectively.
The tape is moved to positions 7' and 28', pulled out from the entire tape cassette (not shown), and wound around a rotating head drum (not shown) at a predetermined angle.

In addition, by rotating the capstan motor 16 in the opposite direction, the T shaft holder 26', the S1 shaft holder 27', and the S2 shaft holder 28' are each rotated 26.
The tape is returned to the 27 and 28 positions, and the pulled-out tape is wound up by the take-up reel stand 4o.

To explain the tape winding operation, when the tape is pulled back, the capstan motor 16 rotates in the direction of arrow B, so the center pulley 18 also rotates in the direction of arrow B.

The gear 19' (Fig. 5) meshes with the pin 37' set on the arm 37 (Figs. 3 and 5), which is rotatably held around the same axis 18' as the center pulley 18. There is a gear 38 that rotates. Rotation of gear 19' in the direction of arrow B causes arm 37 and gear 38 to rotate around shaft 18'.
Drive gear 39 and gear 38 rotate in the direction of arrow B around
mesh together. The drive gear 39 and the take-up reel stand 40 are installed in mesh with each other. Since the gear 38 rotates in the direction of arrow C, the take-up reel stand 4o also rotates in the direction of arrow C to wind up the tape.

Next, switching between transmission of the rotation of the capstan motor 16 for tape pulling out and rewinding operations and transmission for winding to the reel stand will be explained.

In FIG. 4, the clutch arm 10 is rotatable about a shaft 11 mounted on the chassis φ, and has a cam groove 10'. The cam groove 10' is engaged with a pin 13 set on the main rod 9, and the movement of the main rod 9 in the direction of arrow -A' causes the clutch arm 1o to rotate in the direction of arrow D-D'. be done. In FIG. 6, the clutch arm 10 has a built-in latch pawl 41 that is slidable in the direction of the arrow FF', and the clutch gear 23, which is applied with a force in the D direction by the clutch compression spring 42, is connected to the chassis. A latch 44 is built in so that it can slide in the direction of the arrow E-E' using the clutch gear support shaft 23' and the clutch gear shaft 43 installed at φ as guides. 0 where a force is applied in the E' direction
Furthermore, the clutch 44 and the clutch gear 23 rotate together around the shaft 23'. In FIG. . As shown in FIG. 6, the clutch arm 10 rotates in the D' direction and the clutch pawl 41
When the clutch 44 is separated from the clutch 44, the clutch 44 is fully pushed in the E' direction by the spring 46. A protrusion 47 (Fig. 6) integrally formed on the clutch 44 meshes with a gear portion 46' formed on the inner surface of the gear 46, and the gear 46 and clutch gear 23ij rotate together, so that the capstan Motor 160 rotations is belt 17, center pulley 18.19. Gears 20, 21° 22, clutch gear 23. The signal is transmitted to the sector gear 26 via the mode gear 24, rotates the T loading gear 29 and the S loading gear 30, and performs an operation of pulling out the tape from the cassette.

As shown in Fig. 7, in contrast to the above case, the clutch arm 1
0 is rotating in the D direction, the clutch pawl 41 pushes the clutch 44fF in the direction, so the protrusion 47 is rotated in the gear portion 46'.
(FIG. 5), the capstan motor 160 only rotates the upper gear 46, the gear 23 is stopped, and the tape drawing operation is also stopped. The biasing force of the clutch compression spring 42 is set to a force that overcomes the biasing force of the spring 46, which attempts to push the clutch 44eK', and slides the clutch 44fK.

FIG. 10 is a plan view showing the entire relationship between the foils formed on the gears 14 and 15 on the mode switch 12 and each mode.

Gear 14. i5 is set to rotate within one rotation.

The operation of the above configuration will be explained above.

First, the operation of moving from the stop state to the playback state will be explained.

When a playback button (not shown) is pressed, a rotation command is input to the mode motor 1, and the main rod 9 is moved in the inward direction.

At this time, the bin 13 moves from the 13' position to the 13 position in FIG. In this range, bin 13 is clutch arm 1
Since the clutch is held in the 0'iiD direction, the clutch pawl 41 is pushing the clutch 44f in the E direction, and the clutch gear 2
3 and the gear 46 do not rotate together, so even if the capstan motor 16 rotates, the tape is not pulled out.

While the main rod 9 moves within this range, the brake (not shown) release position, fast forward, and early spring return mode position are set. At this time, the gear 14 on the mode switch 12 rotates in the direction of arrow G, and the brush ( (not shown) II'1 When the reference position V mark (1) position (Fig. 10) rotates in the direction of arrow G and reaches the (It) position, the output signal (1) in Fig. 11 is generated. do. The mode motor 1 is stopped by this (1) signal.

Since the position of the pin 13 on the main rod 9 corresponding to this position is the position shown in FIG. Since it is pushed by the spring 45 and moves in the E' direction, the gear 46 and the clutch gear 23 can be rotated together by the protrusion 47. When the capstan motor 16'iB' direction starts rotating at this position, the gear 23
also rotates in the B' direction, and the sector gear 26. T loading gear 29. The tape drawing operation is started by the rotation of the S loading gear 3o. The 230 rotations of the Kurasochi gear is connected to the gear 1 on the mode switch 12 via the mode gear 24.
6. The brush (not shown) of the gear 16 is in the (i) position (FIG. 10) at the start of rotation, and corresponds to the (i) position in the output signal of FIG. 11. When tape withdrawal is started, the rotation of the gear 16 advances the brush to position (a) (FIG. 10), and the output signal (a) shown in FIG. 11 is generated. This signal (
), the mode motor 1 is rotated again, the main rod 9 is further moved in the entry direction, and the pitch 13 shown in FIG.
position. At this time, the gear 14 is in the (1) position (Fig. 10)
Then, the electric signal (II) in FIG. 11 is generated. The mode motor 1 is stopped by this electric signal. The clutch arm 1o rotates in the D direction, and the clutch pawl 41 is in a position to push the clutch 44, but the clutch gear 23 is rotated in the B' direction.
A side wall 23' that rotates in the direction and is integral with the clutch gear 23 faces the clutch pawl 41. Thereupon, the clutch compression spring 42 is compressed and the clutch pawl 41 moves in the F' force direction.

Since the capstan motor 16 continues to rotate,
The tip of the clutch pawl 41 contacts the clutch gear side wall 23' and rotates in the direction B' until the metal connection is in the state shown in FIG. Clutch pawl 4 separated from the edge of clutch gear side wall 23'
1 pops out in the direction of arrow F due to the stretching force of the clutch compression spring 42, so that the clutch 44. is an arrow! When the protrusion 47 is pushed in the direction, the protrusion 47 is disengaged from the gear 46, and the rotation of the capstan motor 16 only rotates the gear 46.
Clutch gear 23 stops rotating. The timing between the clutch disengagement and the generation of the electric signal due to the contact of the brush with the foil of the gear 16 is such that if the clutch disengages first, the clutch gear 23 will not rotate. Since the tape 16 does not rotate and no electrical signal is generated by the foil, it cannot be detected that the tape drawing operation has been completed and it is not possible to proceed to the next operation. Therefore, the foil position of the gear 16 is shifted toward the outer circumferential side from the other foils so that the foil position can be detected earlier. A predetermined delay time is provided between electrically detecting the foil signal of the gear 15 and stopping the rotation of the capstan motor 1e, and the gear 46. clutch gear 2
The clutch is designed to disengage at 30 revolutions. In addition, T shaft holder 26', 81 shaft holder 2
7', 82 shaft holder 28' is arranged to complete tape withdrawal and be held in place with a predetermined force. Electrical signal indicating completion of tape pull-out operation
is detected, the mode motor 1 is completely rotated again, the main rod 9 is further moved in the entry direction, and the retaining pin 7 is set at 7'.
position (Figure 1). At the main rod 9 position shown in FIG. 1, the recording and playback state is entered, and this position is called the recording and playback position.

Correspondingly, an electric signal (V) is detected from the gear 14 and the mode motor 1 is stopped. To reach this state, a pinch roller (not shown) and a tensile system regulator (
(not shown) completes the movement to a predetermined position. Second
In the figure, the pin 13 is moved to position 13 while holding the clutch arm 10 (i-arrow direction).Next, the capstan motor 16 is rotated. ', 38
39 to the take-up reel stand 4o, where the tape winding operation is performed. The center pulley 18 rotates together with the gear 19 as shown in FIG. 5, and a sliding member 48 is provided between the gear 19' and the center pulley 18 and is pressurized by a spring 49. Since the rotation from the gear 19' is transmitted to the reel stand 4o, the rotation of the center pulley 18 is converted into a predetermined winding force and transmitted to the reel stand 4o. It is also possible to cope with changes in the rotational speed due to changes in the tape winding diameter of the stand 40.

In Fig. 10, a gear 14 for detecting mode setting operation and a gear 15F for detecting all loading operations.
i. They are formed on the mode switch 12, which is the same board, and share electrical signal foils, as well as sensors (not shown) and switches (not shown) for tape end, accidental erasure prevention, and cassette attachment detection. It has a terminal 12' for receiving input signals (not shown), and also serves as a relay for sending them out from the terminal 12' to the main printed circuit board (not shown).

As described above, according to this embodiment, by providing a driving motor for each of the tape drawing means and the operation mode state setting means, it is possible to improve the operational responsiveness of the mode setting while the tape is running, and to A relatively small torque motor can be used as the drive motor for the state setting means.

Effects of the Invention According to the present invention, the first. By providing the second motor, the mode setting for switching between forward and reverse running directions during tape running can be performed using an independent motor, and as a result, it is possible to improve the responsiveness of the mode setting operation. Become. Furthermore, since the tape drawing operation and the operation mode setting operation are performed by separate motors, it is possible to use a small torque motor for driving the operation mode setting means, and the total weight of the motor can be reduced.

[Brief explanation of drawings]

FIG. 1 is a plan view of the main parts of a recording and reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a plan view showing the configuration of an operation mode setting means of the recording and reproducing apparatus, and FIG. 3 is a plan view of the same recording and reproducing apparatus. FIG. 4 is a plan view showing the structure of the tape extracting means of the device; FIG. 4 is a plan view showing the structure of the clutch of the recording/reproducing device; FIGS. 5a and b
6 to 9 are plan views of main parts explaining the operation of the recording and reproducing apparatus, and FIG. 10 is a plan view showing the configuration of a mode switch of the recording and reproducing apparatus. , FIG. 11 is an output signal waveform diagram of the same mode switch. 1...Mode motor, 9...Main rod, 10...Clutch arm, 12...
...Mode switch, 14...Gear, 16.
... Mountain gear, 16 ... Capstan motor,
23...Clutch gear, 24...Mode gear, 25...Sector gear, 26...Mark T
Shaft holder, 27...S1 shaft holder, 28...S2 shaft holder, 41.
...Clutch pawl, 44...Clutch, 4
6...Gear, 47...Protrusion. Name of agent: Patent attorney Toshio Nakao and 1 other person1+ k'r Figure 4 41-Clara+nε Figure 5 Figure 6q Figure 7 Figure 8 Figure 9

Claims (4)

[Claims] (1) tape drawing means for drawing out a tape from a cassette, winding it around a rotating head drum at a predetermined angle, and rewinding the tape into the cassette; an operation mode setting means for controlling the tape drawing means and selecting and setting an operation mode; first and second motors that respectively drive a tape pull-out means and an operation mode setting means; and detecting the operation modes of the tape pull-out means and the operation mode setting means, respectively, and supplying control signals to the first and second motors. A recording/reproducing device comprising: a position detecting means for outputting an output. (2) The recording/reproducing apparatus according to claim 1, wherein the first motor that drives the tape drawing means is a capstan motor. (3) The position detecting means for detecting the operating mode of the tape pulling means and the position detecting means for detecting the operating mode of the operating mode setting means are disposed on the same substrate. The recording/reproducing device described in Section 1. (4) The recording/reproducing apparatus according to claim 1 or 2, wherein the first and second motors are stopped with a delay time after a stop signal is input from the position detection means.