JPH0227399Y2 - - Google Patents

Description

[Detailed Description of the Invention] (A) Field of Industrial Application The present invention relates to a separation distance adjusting device for adjusting the separation distance between a pinch roller and a capstan during a predetermined switching operation in a magnetic recording/reproducing device.

(B) Prior Art Generally, in a magnetic recording/playback device, during recording, playback, queue, or replay after tape loading, the pinch roller is brought into pressure contact with the capstan to run the cassette tape. In one conventional technique, the pinch roller is connected to an arm that rotates around a spindle, and when the arm rotates, a spring that holds the arm is connected between the arm and a fixed member. There is.

By providing a transmission means that drives the drive motor and rotates the arm using this driving force, the arm rotates while being held by the spring, presses the pinch roller against the capstan, and runs the cassette tape. was.

In a magnetic recording/playback device that has a splicing function for editing and recording, when changing from a recording state to a recording pause state, the cassette tape is rewound for a predetermined amount of time, the capstan is stopped, and when changing from a recording pause state to a recording state, In order to quickly enter the recording state, it is necessary to shorten the rise time of the capstan when the recording pause state is released. The pinch roller, which acts as a camera, was placed slightly away from the capstan in a recording pause state.

However, the distance between the pinch roller and the capstan in the recording pause state must be sufficient to allow the pinch roller to press against the capstan immediately after the capstan rotates when the recording pause state is released. This is a short distance, and there is a drawback that it is difficult to sufficiently adjust the above-mentioned separation distance simply by controlling the drive motor.

(c) Purpose of the invention The present invention is intended to eliminate the above-mentioned drawbacks, and by providing an adjustable pressing body and adjusting the pressing body, it is possible to adjust the slight distance between the pinch roller and the capstan in the recording pause state. The purpose is to

(d) Structure of the invention The present invention is a magnetic recording/reproducing device, which includes a first rotation means that rotates around a first support shaft and is provided with a pinch roller, and a first rotation means that is coupled to the first rotation means and is elastically held. a capstan that is pressed against the pinch roller and causes the cassette tape to run; a second rotation means that rotates about a second support shaft; and a second rotation means that elastically holds the second rotation means. , a pressing body that presses the second rotation means, a transmission means that rotates the first rotation means by rotation of the second rotation means, and a drive means that rotates the second rotation means. and a drive motor that drives the drive means, both ends of the second spring are coupled to the second rotation means and the drive means, respectively, and the pressing body is adjustably coupled to the drive means. It consists of a pinch roller and a capstan distance adjustment device.

(E) Embodiments The details of the present invention will be specifically explained by referring to illustrated embodiments.

Fig. 1 shows the pinch roller and capstan separation distance adjusting device of the present invention in a stopped state where the pinch roller and capstan are separated, and is a plan view looking through the chassis, and Fig. 2 shows the pinch roller and capstan of the present invention in a stopped state. Fig. 3 shows a recording state in which the pinch roller is in pressure contact with the capstan in the separation distance adjustment device of the present invention, and is a plan view of the chassis seen through. FIG. 3 is a plan view showing the chassis in a recording pause state slightly separated from the state shown in FIG. 2;

To explain the figure numbers for Figures 1, 2, and 3, 1 is the drive motor, 2 is the first pulley, and 3 is the drive motor.
is the second pulley, 4 is the belt, 5 is the worm gear,
6 is a master gear, 7 is a stage, 8 is a sliding lever as a driving means, 9 is a first guide pin, 10 is a second guide pin, 11 is a third guide pin, 12 is a fourth guide pin
Guide pins, 13 is a fifth guide pin, 14 is a first guide groove, 15 is a second guide groove, 16 is a third guide groove, 17
18 is a fifth guide groove, 19 is a first support shaft, 20 is a pinch roller support arm as a first rotation means, 21 is a mounting hole provided in the pinch roller support arm 20, and 22 is a pinch roller support arm. 23 is a capstan, 24 is a capstan bearing portion, 25 is a second support shaft, 26 is a second rotation means, 27 is a first spring,
28 is the second spring, 29 is the protective material, 30 is the screw part,
31 is a pressing body, 32 is a third support shaft, 33 is a movable guide, 34 is a movable guide support arm, 35 is a supply reel stand, 36 is a take-up reel stand, and 37 is a distance adjustment device between the pinch roller 22 and the capstan 23. It is.

The operation of the separation distance adjusting device 37 of the present invention in the illustrated mode will be explained using FIGS. 1, 2, and 3. FIG. 1 shows the stopped state, and the sliding lever 8 is The second guide groove 15 provided in 8
and a third guide groove 16 are movably coupled to a second guide pin 10 and a third guide pin 11 provided on the stage 7, so that they are held and slid. In addition, a supply reel stand 35 and a take-up reel stand 36
is driven by the driving force of a capstan motor (not shown).

First, when the drive motor 1 is in a stopped state, the worm gear 5 does not rotate and the master gear 6 does not rotate. A first guide pin 9 provided on the sliding lever 8
Since the sliding lever 8 does not trace the first guide groove 14 provided on the master gear 6, the sliding lever 8 does not slide, and the second rotating means 26, which rotates around the second support shaft 25 provided on the stage 7, , is pressed by a pressing body 31 that is adjustably connected to the sliding lever 8, and is elastically held by the second rotation means 26 and the second spring 28 that is connected at both ends to the sliding lever 8, so that it does not rotate. be. Therefore, the fourth roller provided on the pinch roller support arm 20
Since the guide pin 12 does not trace the fourth guide groove 17 provided in the second rotation means 26, the pinch roller support arm 20 does not rotate around the first support shaft 19, and the first The pinch roller 22 and the capstan 23 are held apart from each other by being elastically held by the spring 27. Also, the movable guide support arm 34
Since the fifth guide pin 13 provided at Capstan bearing part 2
4 is in contact with each other.

FIG. 2 shows the recording state, and from the state shown in FIG. 1, the drive motor 1 is moved counterclockwise when viewed from the left side of FIG. The worm gear 5 is rotated for the time required to slide to the final position in the direction, and the driving force of the drive motor 1 is transmitted to the worm gear 5 through the first pulley 2, belt 4, and second pulley 3, thereby rotating the worm gear 5. From this, the master gear 6 rotates clockwise, the first guide pin 9 provided on the sliding lever 8 traces the first guide groove 14 provided on the master gear 6, and the sliding lever 8 moves to the rightward final position. The second rotation means 26 rotates clockwise about the second support shaft 25 and is elastically held by the second spring 28.
The pressing body 31 is spaced apart from the second rotation means 26. At this time, due to the clockwise rotation of the second rotation means 26, the fourth
The guide pin 12 traces the fourth guide groove 17 provided in the second rotation means 26, and the pinch roller support arm 20 is elastically held by the first spring 27 around the first support shaft 19 and rotates counterclockwise. Rotating pinch roller 2
2 is in pressure contact with the capstan 23, and the fifth guide pin 13 provided on the movable guide support arm 34 is in contact with the fifth guide groove 1 provided on the second rotation means 26.
8, the movable guide support arm 34 rotates counterclockwise around the third support shaft 32, and the movable guide 33 separates from the capstan bearing 24 to drive the capstan motor (not shown). The recording state is executed by rotating the take-up reel stand 38 by force and running a cassette tape (not shown).

Figure 3 shows the recording pause state. When changing from the recording state to the recording pause state, in a magnetic recording/playback device that has a splicing function such as editing recording, the cassette tape is held for a predetermined period of time when the recording state is changed from the recording state to the recording pause state. (not shown) must be rewound. Therefore, when transitioning to the recording pause state, a control means (not shown) causes the capstan motor (not shown) to rotate in the opposite direction to the recording state while the pinch roller 22 is in pressure contact with the capstan 23 to supply the recording pause state. The reel stand 35 is rotated to rewind the cassette tape (not shown) for a predetermined period of time.

After rewinding, the rotation of the capstan motor (not shown) is stopped in order to stop the rotation of the supply reel stand 35. However, if the pinch roller 22 is in pressure contact with the capstan 23 when transitioning from the recording pause state to the recording state, when the capstan motor (not shown) is rotated to rotate the take-up reel stand 36, Since the pinch roller 22 acts as a load, the start-up time of the rotation of the capstan motor (not shown) becomes long, and the continuous shooting effect is lost. For this reason, in the recording pause state, the pinch roller 22 and the capstan 23 must be separated slightly to shorten the start-up time of rotation of the capstan motor (not shown). To do this, the drive motor 1 is slightly rotated clockwise when viewed from the left side in FIG. The transmission is transmitted to the worm gear 5, and the worm gear 5 is rotated to slightly rotate the master gear 6 in the counterclockwise direction, so that the first guide pin 9 provided on the sliding lever 8 moves into the first guide groove 14 provided on the master gear 6. 2, the sliding lever 8 is slightly slid to the left compared to the recording state shown in FIG. 2, and the second rotating means 26 is slightly rotated counterclockwise about the second support shaft 25. Second shot 2
8 and pressed by the pressing body 31, the fourth guide pin 12 provided on the pinch roller support arm 20 traces the fourth guide groove 17 provided on the second rotation means 26. , the pinch roller support arm 20 is connected to the first spring 2 with the first support shaft 19 as the center.
7 and slightly rotated clockwise, the pinch roller 22 and capstan 23 are slightly separated, and the fifth guide pin 13 provided on the movable guide support arm 34
traces the fifth guide groove 18 provided in the second rotation means 26 , the movable guide support arm 34 rotates slightly clockwise around the third support shaft 32 , and the movable guide 33 moves toward the capstan bearing portion 24 . Move slightly in the direction of .

Here, the small distance between the pinch roller 22 and the capstan 23 described above is such that the pinch roller 22 immediately connects to the capstan 23 after the start-up time of the rotation of the capstan motor (not shown) when transitioning from the recording pause state to the recording state. The distance must be sufficient to allow pressure contact, and it is difficult to adjust the slight distance by controlling only the drive motor 1. For this purpose, a pressing force that is combined with a sliding lever 8 and adjustable left and right is used. The body 31 is used to adjust the slight distance between the pinch roller 22 and the capstan 23. The pressing body 31 has an adjustment screw part 30 and a second
The second rotation means 26 is damaged when the rotation means 26 is pressed, and the protection member 29 prevents the slight separation distance between the pinch roller 22 and the capstan 23 from changing.

Then, in FIG. 3, when the pressing body 31 is slightly moved and adjusted to the right, the second rotation means 26 is moved to the second support shaft 2.
5 is elastically held by the second spring 28 and slightly rotated clockwise, the fourth guide pin 12 traces the fourth guide groove 17 and the pinch roller support arm 20
is elastically held by the first spring 27 about the first support shaft 19 and rotates slightly counterclockwise to move the pinch roller 2.
The distance between the pinch roller 22 and the capstan 23 becomes shorter, and when the pressing body 31 is slightly moved and adjusted to the left, the distance between the pinch roller 22 and the capstan 23 becomes longer.

After the start-up time of the rotation of the capstan motor (not shown), the pressing body 31 is adjusted in advance so that the distance is sufficient for the pinch roller 22 to come into pressure contact with the capstan 23, and the recording state is changed to the recording pause state. At the time of transition, the pressing body 31 is pressed against the second rotating means 26 which is rotated by the driving force of the drive motor 1, thereby achieving the sufficient separation distance described above.

(f) Effects of the invention According to the device for adjusting the separation distance between the pinch roller and the capstan of the invention, the separation distance between the pinch roller and the capstan can be adjusted by mechanically adjusting the pressing body, which improves reliability. Further, there are advantages such as fewer parts and improved workability.

[Brief explanation of the drawing]

1, 2, and 3 are plan views of the pinch roller and capstan separation distance adjusting device of the present invention, respectively, showing a stopped state, a recording state, and a recording pause state, and looking through the chassis. . Explanation of main drawing numbers, 1... Drive motor, 8... Sliding lever, 19... First support shaft, 20... Pinch roller support arm, 22... Pinch roller, 23
... Capstan, 25 ... Second support shaft, 26 ...
Second rotation means, 28...second spring, 31...pressing body, 37...separation distance adjustment device.

Claims (1)

[Scope of utility model registration request] In a magnetic recording and reproducing device, a first rotation means that rotates around a first support shaft and is provided with a pinch roller, a first spring coupled with the first rotation means and elastically held, and the pinch roller are in pressure contact with each other. a capstan for causing the cassette tape to travel; a second rotation means for rotating around a second support shaft; a second spring for elastically holding the second rotation means; and a second spring for pressing the second rotation means. a transmission means for rotating the first rotation means by the rotation of the second rotation means;
It is composed of a drive means for rotating the rotation means and a drive motor for driving the drive means, both ends of the second spring are connected to the second rotation means and the drive means, respectively, and the pressing body is Adjustably coupled to the drive means, the drive motor drives the drive means during a predetermined switching operation, and the pressing body presses the second rotation means, thereby changing the distance between the pinch roller and the capstan. A pinch roller and capstan separation distance adjusting device.