JPS6050651A - Pull-out means of tape - Google Patents

Abstract

PURPOSE:To make it possible to use a motor having low reverse torque and to prevent the motor from burning at the failure of a motor control circuit by using a vibration slider crank means for a tape pulling-out means. CONSTITUTION:When a crank board 16 is rotated in the arrow (a) direction by driving a motor rotating shaft 17, the tape pulling-out members 11 is rotated around a fulcrum shaft 15 and the tape 20 is pulled out by a tape roller 13. A pull-out stopping position is set up so that the center line 26 of the crank board 16 makes a right angle with the center line 27 of the tape pulling-out member 11 and a sensor 25 is arranged. If the crank board 16 is rotated in the arrow (b) direction which is the same direction as that of the pulling-out of the tape, the tape pulling-out member 11 is restored to the original position. Said constitution makes it possible to use a motor having low reverse torque, the even if current is made to flow into the motor at the failure of the motor control circuit, the burning of the motor is not generated.

Description

Detailed Description of the Invention (aJ Technical Field of the Invention) This invention relates to a dud BAFi cartridge type recording/playback machine, and in particular to a tape running path that draws out a tape from a tape cartridge and contacts a fixed head via a fixed tape guide. Concerning a tape pull-out mechanism for recording and playback.-1 (b) Prior art and problems Conventional tape pull-out machine S of a cartridge-type recording/playback machine
For example, as shown in Fig. 1, the arm JK tape roller 2
Directly connect the rotating shaft 4 of the tape drawer 3 with a holder attached to the rotating shaft of the motor 5 to drive the arm 1, or reduce the rotation by the motor 5 using a gear 6, 7, etc. as shown in FIG. There is a method of driving the rotary shaft 4 of the arm 1 by doing so.

In addition, 8 is a fixed head, 9 is a fixed guide, 1o is a tape, an S-arm position detection sensor, and P is a tape guide located in the cartridge.

In the former case, the reverse torque of the motor 5 causes the tape to run T'i lIj
If the force is greater than the + tape tension, the arm 1 will move due to the tape tension, so there is a disadvantage that the motor 5 with a large reverse torque must be used, and the latter has a gear 6.7 etc. There is a drawback that nIJ becomes longer when the tape is drawn out at 7 because of the deceleration. Also,
What is common to both is that in the unlikely event that the control circuit of the motor 5 is damaged and current continues to flow through the motor 5,
A stopper (not shown) for stopping the arm 1
In this case, the motor 5 will stop rotating, but the current will continue to flow, so there is a risk that the motor 5 will burn out.

(c) Purpose of the Invention The purpose of the present invention is to use a swinging slider crank mechanism in the tape pull-out mechanism so that the arm does not move due to tape tension, even though a motor with relatively low reverse torque is used. Furthermore, it is an object of the present invention to provide a tape drawing mechanism that does not cause the motor to burn out even if the control circuit of the motor that rotates the arm is broken and current continues to flow through the motor.

According to the present invention, the present invention provides a cartridge-type recording/playback device in which a tape pull-out member having a tape roller attached to an arm is rotated about a fulcrum of the arm to pull out a tape from a tape cartridge. In the tape drawing mechanism, a link groove is provided in the arm, and a crank plate, one end of which engages with the link groove and rotates the arm about the fulcrum, is arranged in a direction substantially perpendicular to the link groove. This is achieved by providing a tape drawing mechanism characterized in that the crank plate is disposed at the crank plate and the other end of the crank plate is connected to a drive shaft of a drive source.

(e) Examples of the invention Embodiments of the present invention will be described in detail below with reference to the drawings.

Figures 3 and 4 are diagrams for explaining one embodiment of the pull-out mechanism of the present invention.
At the time of ejection, FIG. 4 shows the respective positions of the recording, ('j half o'clock).

In the figure, a pair of tape drawers 44' i i
ld, direct the tape roller 13 to the tip of the arm 12,
Furthermore, a link groove 14 is provided in the center of the arm 12 to engage with a crank plate 16, which will be described later.
A fulcrum shaft 15 is provided 1IIIJ opposite to the tape row 213, so that the tape pull-out portion @11 rotates around the fulcrum shaft 15. On the other hand, one end of the crank plate 16 is fixed to the motor rotating shaft 17, and the row 21 is attached to the shaft 18 provided at the other end.
9 is held, and the roller 19 is engaged with the link groove 14 to constitute a driving device for the swinging slider crank mechanism.

When pulling out the tape 20 from the state shown in FIG. 3 in which the tape cartridge A is installed in the cartridge-type recording/playback machine, the tape 20 is initially straight along the cartridge surface as shown in the figure, and the tape in the tape pull-out member 11 is The roller 13 falls into the pull-out groove 21. Motor rotation shaft 17
When the crank plate 1G is rotated in the direction of the arrow a by driving, the tape pull-out member II rotates around the fulcrum shaft I5,
The tape 20 is pulled out by the tape roller 13. Further, a sensor 25 is provided to stop the tape pulling member 11 so that the pulled out tape 20 comes into contact with a fixed head 23 via a fixed guide 22 to form a tape bus for recording and reproduction. When the tape pull-out member 11 is detected by the sensor 25, the drive of the crank plate 16 is stopped, and the state shown in FIG. 4 is maintained. Note that P indicates a tape guide in the cartridge.

In addition, if the tape pull-out stop position is set so that the center line 26 of the crank plate 16 and the center line 27 of the tape pull-out member 11 are at right angles as shown in Figure @5, the tape at the tape roller I3 of the tape pull-out member 11 is The tension is T in the figure, and its component forces are T, , 'l'2, and the component force T1 is the center line 27 of the tape pull-out member 11.
Since it is on the top and is perpendicular to the crank plate 16, it does not apply any rotational force to the crank plate 16, and the component force T2 tries to apply a rotational force to the crank plate 16, but its direction is '' Since the center lines 26 of the two are in the same direction, the buckling plate 26 does not buckle! t, the tape draw-out position can be maintained.

Also, by rotating the crank plate 16 in the same direction as when pulling out the tape, as shown by the arrow in FIG. 4, the tape pulling member can return to its original position in the cartridge A.

Since the motor does not rotate in the reverse direction as described above, the motor 1lJll m'J circuit is easily configured, and even if the motor ft1lt l111 circuit is broken and current flows through the motor, the motor will continue to function. Since it can continue to rotate, the motor will not burn out.

Note that when the tape pull-out member 11 returns to the original position of the cartridge and stops, a sensor etc. (not shown)
Needless to say, the rotation of the crank plate 16 can be stopped by using 0 (f). Effects of the Invention As explained in detail above, the tape pull-out mechanism of the present invention converts the rotational motion of the motor into a swinging motion. By using the oscillating slider crank mechanism, it is possible to pull out the tape from the cassette and restore the tape to the cassette in the same rotational direction of the motor, and even in the unlikely event that current continues to flow through the motor. Since the motor can continue to rotate, burnout of the motor can be prevented, and since there is no reverse rotation of the motor, the motor control circuit can be simplified. In addition, in the oscillating slider crank mechanism, the tape is pulled out when the crank plate and arm are at right angles (by setting the position to 7, large reverse torque can be achieved without using a motor with large reverse torque as in the past) is obtained and the tape can be kept in the tape extraction position.

[Brief explanation of drawings]

Figures 3 and 4 are diagrams for explaining one embodiment of the tape pull-out mechanism between the home bases. The respective positions during sound and reproduction are shown in FIG. In the figure, 11 is the tape drawer, 12 is the arm, 13 is the tape roller, 14 is the link groove. 15IJ is the fulcrum shaft, 16 is the crank plate, 17 is the morph rotation shaft, 18 is the shaft, 19 is the roller, and 201d , tape. 21 is a pull-out groove, 22 is a phantom, Lt+ constant tape guide, 2
3 is the fixed head, 24 is the tape running path, 25 is the sensor, 26 is the center of the crank plate (6, z7fd is the stop line of the boob drawer 1 member. 1st eye 2nd mouth 3 layer 4) Figure A

Claims (1)

[Claims] A tape pull-out member having a tape roller on an arm is rotated around the fulcrum of the arm to create a tape car)
A tape pull-out mechanism for a Gartridge recording/playback machine that pulls out a tape from a Judge, wherein the arm is provided with a link groove, one end of which engages with the link groove, and rotates the arm around the fulcrum. A tape pull-out mechanism characterized in that a crank plate is disposed in a direction substantially perpendicular to the link groove, and the other end of the two crank plates is connected to a drive shaft of a drive source.