JPS6153776B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder that allows efficient braking.

In a tape recorder, it is necessary to apply braking to the reel stand at the end of a recording or playback operation, or at the end of a rewinding or fast forwarding operation. Braking on the reel stand is usually achieved by applying pressure to the periphery of the reel stand, but especially for small reel stands such as micro cassette type tape recorders, it is difficult to stop the reel stand instantly. It took a lot of braking force to do that. Incidentally, in the microcassette type tape recorder, a gear is used in the transmission mechanism in order to ensure that the driving force from the flywheel is transmitted to the reel stand.

The present invention is a tape that maintains the transmission mechanism in an operating state even after playback, recording, rewinding, etc., and applies a brake to the flywheel to obtain a large braking force with a small force. It provides a recorder, which will be explained below with reference to the drawings.

Reference numeral 1 denotes a flywheel driven by a motor (not shown), and a drive gear 4 is provided on a rotating shaft 3 serving as a capstan. 5 is a first transmission gear constituting a winding drive system for playback or recording;
Reference numerals 6 and 7 denote second and third transmission gears constituting a rewinding drive system. 6 and 7 are engaged only during rewinding. Reference numerals 8 and 9 denote a take-up reel stand and a supply reel stand, and the take-up rail stand 8 is attached with a first rotating gear 10 that meshes with the first transmission gear 5, and the supply reel stand 9 is equipped with a third transmission gear 7. The second rotating gear 1 meshing with
1 is provided. Reference numeral 13 denotes a stop operation lever having a stop button 14, which has long holes 17 and 18 into which pins 15 and 16 are fitted, and an engagement protrusion 19. Reference numeral 20 denotes a first brake plate that is rotated around the pin 16 that fits into the elongated hole 21, and a rotating member that is rotated by the slide base 22 or the rewind and fast forward operation levers (not shown). a leg piece 24 that is locked to 23;
and a brake shoe 25 that presses against the flywheel 1. Reference numeral 26 denotes a second brake plate supported by a shaft 27, which is connected to the inclined arm portion 28 of the stop operation lever 13.
It has a protrusion 29 that engages with the supply reel stand 9 and a brake shoe 30 that is crimped around the supply reel stand 9.

Next, the operation of the tape recorder of the present invention will be explained.

When the brake shoe 2 is initially stopped, the biasing force of the spring 31 causes the brake shoe 2 to move as shown in FIG.
5 is pressed around the flywheel 1, the movement of the second brake plate 26 is prevented by the protrusion 29 of the second brake plate 26 being engaged with the arm 28, and the brake shoe 30 is pressed against the supply reel stand 9. It is configured to be further away.

Now, for example, when a playback button (not shown) is pressed to perform playback, the slide base 22 moves to the right and presses the first brake plate 20. Then the first
Since the brake plate 20 is rotated while the elongated hole 21 moves around the pin 16 without being obstructed by the engagement protrusion 19, the brake shoe 25 is separated from the flywheel 1. At the same time, a power switch (not shown) is turned on and the motor is rotated.
The rotational force generated by the rotation of the motor rotates the flywheel 1 via the belt 2.
At this time, the first transmission gear 5 meshing with the drive gear 4 and the first rotary gear 10 rotate, causing the take-up reel stand 8 to rotate. Therefore, the tape driven at a constant speed by the capstan and the pinch roller is wound onto the take-up reel stand 8 and played back.

To stop the playback after completion, press the stop button 14 and slide the stop operation lever 13 to the right.
Then, as shown in FIG.
The projections 29 of the second brake plate 2 are freed, and the second brake plate 2
6 is rotated clockwise by a spring 32 to press the brake shoe 30 around the supply reel stand 9 and stop the rotation of the supply reel stand 9. Next, the slide base 22, which has been locked until now, is unlocked and returned to its original position by operating the stop operation lever 13, so the first brake plate 20 is rotated clockwise by the spring 31. , the brake shoe 25 comes into pressure contact with the periphery of the flywheel 1 to stop the flywheel 1.
When the flywheel 1 stops, the drive gear 4, the first transmission gear 5, and the first rotary gear 10 remain in mesh with each other, so the take-up reel stand 8 is also stopped, but the take-up reel stand 8 is connected to the supply reel. Since the stand 9 stops a little while after it stops, the tape stops without slack.

When recording, the operation is exactly the same as that described above.

Next, when the rewind button is pressed to perform rewinding, even if the rewinding operation lever rotates the rotary member 23 clockwise, the first brake plate 20 is rotated counterclockwise and the brake is activated. Release U-25 from flywheel 1. Also, the power switch is turned on, the motor is rotated, and the flywheel 1 is rotated, and the first transmission gear 5, which has been meshed with the drive gear 4, is released, and the second and third transmission gears 6, 6, 7 are engaged, so the supply reel stand 9 is rotated this time. Moreover, since the second transmission gear 6 with a smaller diameter is used as an intermediary, the rotation is performed at high speed and in the opposite direction to the above-mentioned state.

When the stop button is pressed to stop the rewinding state, the second brake plate 26 is rotated clockwise by the spring 32 in the same manner as described above, and the brake shoe 30 is moved around the circumference of the supply reel stand 9. Apply pressure to stop. This stopping operation causes the rotating member 23 to return, so the first brake plate 20 returns to rotating clockwise, and the brake shoe 25 comes into pressure contact with the flywheel 1. Therefore, when the rewind operation lever returns, the second and third transmission gears 6 and 7 are separated and the drive gear 4
and the first transmission gear 5 mesh again, and the rotational force from the flywheel 1 is transmitted to the take-up reel stand 8. However, since the flywheel 1 is also stopped immediately when the motor is stopped, there is no force on the tape. No force is applied.

As described above, in the tape recorder of the present invention, the transmission mechanism for transmitting the rotational force of the flywheel is kept in operation even when the flywheel is stopped, and the brake shoe is pressed against the periphery of the flywheel having a large diameter to perform braking. In addition, the reel stand is made to stop quickly, so a large braking force can be obtained with a small amount of force. Also, since the brake shoe can be installed around the flywheel where there is a relatively large amount of space,
It is suitable for devices where there is no space around the reel stand, such as microcassette type tape recorders.

In addition, since gears are used for the transmission mechanism, the braking force applied to the flywheel is transmitted to the reel stand very reliably, which is useful in practice.

[Brief explanation of the drawing]

The figures are all plan views showing the tape recorder of the present invention, in which Fig. 1 is in a stopped state, Fig. 2 is in an operating state, and Fig. 3 is a plan view showing the tape recorder of the present invention.
The figures each show the braking state when changing from the operating state to the stopped state. 1...Flywheel, 4...Drive gear, 5...
...First transmission gear, 8... Take-up reel stand, 9...
Supply reel stand, 20...first brake plate, 25...brake shoe, 26...second brake plate, 30...brake shoe.

Claims (1)

[Claims] 1. A flywheel driven by a motor, a transmission gear that meshes with a drive gear provided on the rotating shaft of the flywheel, a reel stand that has a rotation gear that meshes with the transmission gear, and a reel base that is pressed into contact with the flywheel. When the tape is stopped from the tape running state, the brake shoe is pressed against the flywheel while keeping the driving gear, the transmission gear, and the rotary gear in mesh with each other. A tape recorder characterized by applying braking to the reel stand.