JP2568558B2 - Recording and playback device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus, such as a video tape recorder, for recording, reproducing, or recording / reproducing a signal using a cassette containing a magnetic tape.

2. Description of the Related Art In recent years, recording / reproducing apparatuses such as video tape recorders have been increasingly reduced in size, weight, and price, and accordingly, an operation mode setting method and a tape pull-out operation method have been considered.

In a conventional recording / reproducing apparatus, a capstan motor 1 is used.
In some cases, the operation mode is set and the tape is pulled out, or the capstan motor is exclusively used for driving the tape, and another motor performs both the operation mode setting and the tape drawing operation.

Problems to be Solved by the Invention However, in the above-described conventional configuration, when a plurality of operations are performed only by the capstan motor, a tape flow occurs due to inertia when the tape changes from forward reproduction to reverse reproduction, and a response occurs. Is delayed. Further, when both the tape pulling-out operation and the operation mode setting are performed by one motor, a motor having a large torque is required, so that there is a problem that the motor becomes large and its weight increases.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a recording / reproducing apparatus which has a good operation response and realizes a light weight apparatus.

Means for Solving the Problems In order to achieve the above object, the recording / reproducing apparatus of the present invention comprises:
Tape withdrawing means for withdrawing a tape from a cassette, winding the tape around a rotary head drum at a predetermined angle, and rewinding the tape into the cassette; operation mode setting means for controlling the tape withdrawing means to select and set an operation mode; , A capstan motor that stops with a delay time after a stop signal is input, a mode motor that drives the operation mode setting unit and stops after a stop signal is input, the tape withdrawing unit, and an operation mode First and second position detecting means for respectively detecting an operation mode of the setting means and outputting a control signal to the capstan motor and the mode motor, wherein the first and second position detecting means are on the same substrate. It is arranged in.

According to the above configuration, since the operation of setting the operation mode and the tape pulling-out operation are performed by the first and second motors, respectively, the responsiveness of the tape driving operation can be increased, and the tape requiring a large torque can be obtained. Since the pull-out operation is performed by a motor different from the motor for setting the operation mode, it is possible to use a small motor having a small torque as the motor for setting the operation mode.

Embodiment Hereinafter, a recording / 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 one embodiment of the present invention. In order to perform each mode setting such as stop, fast forward, video recording, and playback, both the mode motor 1 and the capstan motor 16 are used.

First, with reference to FIG. 2, the configuration of a main portion driven by the mode motor 1 will be described.

A gear 2 is integrally attached to the mode motor 1 on its rotating shaft, and rotation is transmitted to a gear 3 that meshes with the gear 2. The gear 3 is integral with the worm gear 4, and rotation is transmitted to the worm wheel 5 in a different direction. By the gears 2, 3, and 4, the rotation of the mode motor 1 is converted into an appropriate rotation, and the rotation is reduced. The worm wheel 5 rotates integrally with the drive gear 6. A screw pin 7 is screwed to the drive gear 6, and this screw pin 7 is guided by the mode motor 1 and the guide groove 8 'of the holding plate 8 of the gears 3, 4, 5 and is indicated by an arrow AA. ′ In the direction of rotation of the mode motor 1. The screwing pin 7 is engaged with the main rod 9, and moves the main rod 9 in the AA ′ direction by rotating the mode motor 1.

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 / reproduction mode position. With the movement of the main rod 9, a brake, a tension arm, a pinch roller (not shown) and the like are moved by a cam surface formed on the main rod 9 to set a state necessary for each mode.

The detection of each mode position is performed by an electric signal generated from the mode switch 12. A gear 14 meshing with the main rod 9 is provided on the mode switch 12, and is rotated by the movement of the main rod 9 in the A-A 'direction.
Foil 47 formed on switch 12 corresponding to each mode position
(FIG. 10) and a brush (not shown) that rotates together with the gear 14
Generates an electrical signal upon contact with This is fed back to the drive circuit of the mode motor 1, and the mode motor 1 is rotated and stopped to hold each mode position.

Next, a tape pull-out operation of pulling out a tape (not shown) in the cassette and winding it around a rotary head drum (not shown) at a predetermined angle, and a rewinding operation of rewinding the tape into the cassette again will be described.

In FIG. 3, when the capstan motor 16 rotates, the capstan pulley 16 'rotates integrally.
This rotation is transmitted to the center pulley 18 via the belt 17. Gear that rotates integrally with the center pulley 18
19, the rotation of this gear 19 is gear 20, gear 21, gear 22,
The speed is reduced to the mode gear 24 through the gear 46 and the clutch gear 23, and transmitted to the sector gear 25. Sector gear
The T loading gear 29 meshes with the chassis φ (fifth
(See Fig.). The arm 31 is held by the T loading gear 29 so as to engage with the shaft 29 'and rotate. The arm 32 pivots about a pin 31 'implanted on the arm 31, and the arm 32 is rotatably held at the other end with a pin 26 "implanted in a T-shaft holder 26'. The T shaft holder 26 at the tape rewinding complete position draws out the tape by rotating the T loading gear 29 along a guide groove (not shown), and the pulling out operation is completed and held at the position 26 '.

At the same time, the S loading gear 30 rotates while meshing with the T loading gear 29. The arm 33 is engaged with the S-loading gear 30, and is mounted on a chassis φ (FIG. 5).
It is held so as to pivot around 30 '. The arm 34 and the arm 35 are formed by a pin 33 'planted on the arm 33, a pin 35' planted on the arm 35, and a pin 27 "planted on the S1 shaft holder 27 '. The arm 34 is rotatable about a pin 33 'and also about a pin 35'.
The arm 36 is rotatable about a pin 35 'as a fulcrum.
It is movable along 36 '. S2 shaft holder 28 '
Is connected to the arm 36 by a pin 28 "mounted on the S2 shaft holder 28 '. The arm 36 can rotate about the pin 28' as a fulcrum. Then, the S2 shaft holder 28 moves along each guide groove (not shown) by the rotation of the S loading gear 30, and the tape withdrawal is completed at the positions 27 'and 28'.

Therefore, by rotating the capstan motor 16, the T shaft holder 26, S1 shaft holder 27, S2
The shaft holder 28 is moved to positions 26 ', 27' and 28 ', respectively, and the tape is pulled out of a cassette (not shown) and wound around a rotary head drum (not shown) at a predetermined angle. By rotating the capstan motor 16 in the reverse direction, T
The shaft holder 26 ', the S1 shaft holder 27', and the S2 shaft holder 28 'are returned to the respective positions 26, 27, and 28, and the pulled-out tape is taken up by the take-up reel table 40.

The tape winding operation will be described. When the tape is pulled back, the capstan motor 16 rotates in the direction of arrow B, so that the center pulley 18 also rotates in the direction of arrow B. The gear 37 'meshes with the center of a pin 37' mounted on an arm 37 (Figs. 3 and 5) held rotatably about the same shaft 18 'as the center pulley 18. There is a gear 38 that rotates. The arm 37 and the gear 38 rotate around the shaft 18 'in the direction of arrow B by the rotation of the gear 19' in the direction of arrow B, so that the drive gear 39 and the gear 38 mesh. The drive gear 39 and the take-up reel base 40 are installed in mesh with each other. Then, since the gear 38 rotates in the direction of arrow C, the take-up reel base 40 also rotates in the direction of arrow C to wind up the tape.

Next, switching between the transmission of the rotation of the capstan motor 16 to the tape drawing and rewinding operation and the transmission for winding on the reel base will be described.

In FIG. 4, the clutch arm 10 is freely rotatable about a shaft 11 erected on the chassis φ as a support shaft.
It has 0 '. The cam groove 10 ′ is engaged with a pin 13 erected on the main rod 9,
The movement in the -A 'direction causes the clutch arm 10 to rotate in the direction of the arrow DD'. In FIG. 6, a clutch claw 41 slidable in the direction of arrow FF 'is incorporated in the clutch arm 10, and a force in the direction D is applied by a clutch compression spring 42. The clutch gear 23 incorporates a clutch gear support shaft 23 ′ set on the chassis φ and a clutch 44 slidable in the direction of the arrow EE ′ using the clutch gear surface 43 as a guide. A force in the direction of arrow E 'is applied by the spring 45 provided. The clutch 44 and the clutch gear 23 rotate integrally around the shaft 23 '.

In FIG. 5, a gear 46 having a shaft 23 'as a rotation shaft is stopped in the clutch gear 23. As shown in FIG. 6, when the clutch arm 10 rotates in the direction D 'and the clutch pawl 41 is separated from the clutch 44, the clutch 44 is fully pushed in the direction E' by the spring 45. A projection 47 (FIG. 6) formed integrally with the clutch 44 meshes with a gear portion 46 'formed on the inner surface of the gear 46, and the gear 46 and the clutch gear 23 rotate integrally, so that the capstan The rotation of the motor 16 is transmitted to the sector gear 25 via the belt 17, the center pulleys 18, 19, the gears 20, 21, 22, the clutch gear 23, and the mode gear 24, and the T loading gear 29 and the S loading gear 30
Is rotated to perform a tape pull-out operation from the cassette.

As shown in FIG. 7, the clutch arm is
When 10 rotates in the D direction, the clutch 47 presses the clutch 44 in the E direction, so that the projection 47 is in the gear portion 46 '(FIG. 5).
Is disengaged, the rotation of the capstan motor 16 stops only by rotating the gear 46, the gear 23 is stopped, and the tape pull-out operation is also stopped. The biasing force of the clutch compression spring 42 is set to a force that slides the clutch 44 in the E direction by overcoming the biasing force of the spring 45 that pushes the clutch 44 in the E ′ direction.

FIG. 10 is a plan view showing the relationship between the foils formed on the gears 14 and 15 on the mode switch 12 and each mode. Gear 1
4 and 15 are set to rotate within one rotation.

 The operation of the above configuration will be described above.

First, an operation of moving from the stop state to the reproduction state will be described.

When a play button (not shown) is pressed, a rotation command is input to the mode motor 1 to move the main rod 9 in the A direction. At this time, the pin 13 moves from the 13 'position to the 13 position in FIG. In this range, the pin 13 sets the clutch arm 10 to D
, The clutch pawl 41 pushes the clutch 44 in the direction E, and the clutch gear 23 and the gear 46 do not rotate integrally, so that even if the capstan motor 16 rotates, the tape pull-out operation is not performed. While the main rod 9 moves in this range, a brake (not shown) release position, a fast-forward and a fast-rewind 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) moves to the V mark (I) position (10th position) which is the reference position.
(Fig.) In the direction of arrow G, and when it comes to position (II),
The output signal (II) in the figure is generated. The mode motor 1 is stopped by this (II) signal. Since the position of the pin 13 on the main rod 9 corresponding to this position is the position shown in FIG. 6, the clutch arm 10 rotates in the direction D ', the clutch pawl 41 separates from the clutch 44, and the clutch 44 Spring 45
The gear 46 and the clutch gear 23 can be integrally rotated by the projection 47. When the capstan motor 16 starts rotating in the direction B 'at this position, the gear 23 also rotates in the direction B', and the rotation of the sector gear 25, the T loading gear 29, and the S loading gear 30 starts the tape pull-out operation. The rotation of the clutch gear 23 is transmitted to the gear 15 on the mode switch 12 via the mode gear 24. The brush (not shown) of the gear 15 is in the position (FIG. 10) at the start of rotation (FIG. 10), and corresponds to the position (YES) in the output signal of FIG. When the tape is started to be pulled out, the rotation of the gear 15 causes the brush to advance to the position (H) (FIG. 10), and generates the (H) output signal in FIG. The mode motor 1 is rotated again by this signal (H), and the main rod 9 is further moved in the direction A to the pin 13 position shown in FIG. At this time, the gear 14 is in the (III) position (FIG. 10), and the gear 14 is in the (III) position in FIG.
Generate electrical signals. The mode motor 1 is stopped by this electric signal. The clutch arm 10 rotates in the direction D, and the clutch pawls 41 can press the clutch 44.
The clutch gear 23 rotates in the direction B 'and the side wall 23 "integral with the clutch gear 23 faces the clutch pawl 41. The clutch compression spring 42 contracts and the clutch pawl 41 moves in the direction F'. Since the stun motor 16 continues to rotate, the tip of the clutch pawl 41 continues to rotate in the direction B 'while being in contact with the clutch gear side wall 23 ", resulting in the state shown in FIG. Clutch pawl 41 away from edge of clutch gear side wall 23 "
Is ejected in the direction of arrow F by the extension force of the clutch compression spring 42, so that the clutch 44 is pushed in the direction of arrow E,
47 is disengaged from the gear 46 and the capstan motor 16
Is stopped only by rotating the gear 46, and the clutch gear 23 stops rotating. The timing of the clutch disengagement at this time and the timing of the generation of an electric signal due to the brush contacting the foil of the gear 15 are different because the clutch gear 23 does not rotate if the clutch is disengaged first. Fifteen
Also does not rotate and no electrical signal is generated by the foil,
The completion of the tape pull-out operation cannot be detected, and the next operation cannot be performed. Therefore, the foil (N) position of the gear 15 is formed so as to be shifted to the outer peripheral side from the other foils so that the foil (N) position can be detected earlier. A predetermined delay time is provided from when the foil signal of the gear 15 is electrically detected to when the rotation of the capstan motor 16 is stopped, and the clutch is disengaged by the rotation of the gear 46 and the clutch gear 23 during that time. Is formed. The T shaft holder 26 ', the S1 shaft holder 27', and the S2 shaft holder 28 'are arranged so that the tape is completely pulled out and held at a predetermined position with a predetermined force. When an electric signal indicating the completion of the tape drawing operation is detected, the mode motor 1 is rotated again, the main rod 9 is further moved in the direction A, and the engaging pin 7 comes to the 7 'position (FIG. 1). To do. At the position of the main rod 9 shown in FIG.
This position is called a recording / playback position. Gear 14 correspondingly
, The mode motor 1 is stopped. By the time this state is reached, the pinch roller (not shown) and the tension regulator (not shown) have been moved to predetermined positions. In FIG. 2, the pin 13 is moved to the position while keeping the clutch arm 10 in the direction of arrow D.
At 13. Next, the capstan motor 16 is rotated.
The rotation of the capstan motor 16 is transmitted from the center pulley 18 to the take-up reel table 40 via the gears 19 ', 38, and 39, and the tape winding operation is performed. The center pulley 18 rotates integrally with the gear 19 as shown in FIG. 5, but a sliding member 48 is provided between the gear 19 'and the center pulley 18 and is pressed by a spring 49. Since the rotation from the gear 19 'is transmitted to the reel base 40, the rotation of the center pulley 18 is converted into a predetermined winding force and transmitted to the reel base 40,
With this configuration, it is possible to cope with a change in the number of rotations accompanying a change in the tape winding diameter of the reel base 40.

In FIG. 10, a gear 14 for detecting a mode setting operation and a gear 15 for detecting a loading operation are formed on a mode switch 12 which is the same substrate, and share a sharable electric signal foil. It also has a center (not shown) for detecting the end of the tape, prevention of erroneous erasure, detection of a cassette device, and a terminal 12 'for receiving an input signal of a switch (not shown). )) And also serves as a relay for sending out from terminal 12 ″.

As described above, according to this embodiment, the drive motor is provided in each of the tape pull-out means and the operation mode state setting means, so that the operation responsiveness of the mode setting during the tape running can be improved, and the operation mode can be improved. A relatively small torque motor can be used as the drive motor of the state setting means.

According to the present invention, by providing the first and second motors for driving the tape pull-out means and the operation mode setting means, respectively, it is possible to set the mode for forward / reverse switching of the running direction during the running of the tape. This can be performed by an independent motor, and as a result, the responsiveness of the mode setting operation can be improved. Further, since the tape pulling-out operation and the operation mode setting operation are performed by different motors, respectively, a motor for driving the operation mode setting means can be a small torque motor, so that the total weight of the motor can be reduced. Furthermore, since the first and second position detecting means are provided on the same substrate, the number of components can be reduced, and the electric signal foils used for the first and second position detecting means are commonly used. Since the electric signal foil to be used can be shared, there is an excellent effect that the circuit configuration on the substrate can be simplified.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part showing a configuration of a recording / reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a plan view showing a configuration of an operation mode setting means of the recording / reproducing apparatus, and FIG. FIG. 4 is a plan view showing the structure of the tape pull-out means of the apparatus, FIG. 4 is a plan view showing the structure of the clutch of the recording / reproducing apparatus, FIGS. 5a and 5b are cross-sectional views of main parts of the recording / reproducing apparatus, FIGS. FIG. 9 is a plan view of an essential part for explaining the operation of the recording / reproducing apparatus, FIG. 10 is a plan view showing a configuration of a mode switch of the recording / reproducing apparatus,
FIG. 11 is an output signal waveform diagram of the mode switch. 1 Mode motor, 9 Main rod, 10 Clutch arm, 12 Mode switch, 14 Gear, 15
… Gear, 16… Capstan motor, 23… Clutch gear, 24… Mode gear, 25… Sector gear, 26 ……
T shaft holder, 27 ... S1 shaft holder, 28 ...
... S2 shaft holder, 41 ... Clutch pawl, 44 ... Clutch, 46 ... Gear, 47 ... Protrusion.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshiyuki Saito 1006 Kadoma Kadoma, Matsushita Electric Industrial Co., Ltd. (72) Inventor Fuminari Saito 1006 Odaka Kadoma, Kadoma City Matsushita Electric Industrial Co., Ltd. (72) Inventor Kenji Sasaki 1006 Kadoma, Kadoma City Matsushita Electric Industrial Co., Ltd. (56) References JP-A-62-86568 (JP, A) JP-A-62-10262 (JP, A) JP-A-61-1558061 (JP, A) A) Actually open 1979-44509 (JP, U)

Claims (1)

(57) [Claims] A tape drawing means for drawing a tape from a cassette, winding the tape around a rotary head drum at a predetermined angle, and rewinding the tape into the cassette; an operation mode setting means for controlling the tape drawing means to select and set an operation mode; A capstan motor that drives the tape pull-out means and stops with a delay time after a stop signal is input, a mode motor that drives the operation mode setting means and stops after a stop signal is input, First and second position detection means for detecting operation modes of the drawer means and the operation mode setting means and outputting control signals to the capstan motor and the mode motor, respectively, wherein the first and second position detection means are provided. The recording / reproducing apparatus, wherein the means is provided on the same substrate.