JPH0834020B2 - Auto reverse tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention performs auto-reverse by separating the pinch roller from the capstan shaft, and at the end of the auto-reverse, the pinch roller is pressed against the capstan shaft for recording. The present invention relates to an auto-reverse tape recorder in which a reproducing operation is rotated by reversing a flywheel.

(Prior Art) FIG. 7 shows a conventional automatic reverse tape recorder. The drive arm 22 is pivotally attached to the flywheel gear 21 fixed coaxially with the capstan flywheel 40, and the drive gears 23 and 24 are attached to both ends of the drive arm 22 to mesh with the flywheel gear 21. The drive gear 23 is meshed with one reel gear 27 to perform recording / playback. At the time of reverse, the motor 26 is reversely rotated, the drive gear 23 is meshed with the fixed gear 28 to reverse the drive arm 22, and the cam pin 32 of the cam gear 31 is pressed by the drive arm claw 30 to rotate the cam gear 31 slightly, and the cam gear 31.
And the flywheel gear 21 mesh with each other, and the cam gear 31 rotates in the direction of arrow B. During this rotation, the cam 39 presses the pin 35 protruding from the head substrate 34 to which the pinch roller 33 is attached outward,
Since the pinch roller 33 is kept away from the capstan shaft 37, the tape is not transferred. Drive arm 22
When the drive gear 24 meshes with the reel gear 38 at the final position, the pin 35 is disengaged from the cam 39, the pinch roller 33 is pressed against the capstan shaft 37 again, and the tape is wound for recording / playback. When the flywheel is reversed, the above-described operations reversely rotate the drive arm, and the recording / playback state is set in the opposite direction.

(Problems to be Solved by the Invention) By the way, in the above prior art, two drive gears are provided,
Cam gear and mesh with the flywheel gear
There is a problem in that the structure is complicated and expensive because it requires a mechanism for separating.

(Means for Solving the Problem) The present invention is intended to solve the above problems, and a capstan shaft and a flywheel gear are fixed to a flywheel, and a drive arm is attached to the flywheel gear.
A drive gear that meshes with the flywheel gear is attached to the tip of the drive arm, and a fixed gear that meshes with the drive gear is arranged on the main body base, and the drive arm is rotated by meshing the drive gear and the fixed gear by reversing the flywheel. Then, during the rotation of the drive arm, the pinch roller arranged on the substrate that is engaged with and interlocks with the cam of the drive arm is separated from the capstan shaft,
When the drive gear disengages from the fixed gear and meshes with the reel gear or the rewind reel gear, the pinch roller is pressed against the capstan shaft to wind the tape, and the tape is recorded / played back. However, only by interlocking the cam of the drive arm and the substrate on which the pinch roller is provided, the pinch roller is brought into and out of contact with the capstan shaft so that the recording / playback state is in the opposite direction.

(Example) 1 is a main body base to which a motor 2 is attached.
The output shaft 3 and the flywheel 4 are linked by a belt 5. The base of the drive arm 7 is fixed to the flywheel gear 6 that is fixed coaxially with the flywheel 4, and the drive gear 8 is meshed with the half-moon-shaped fixed gear 9 fixed to the flywheel gear 6 and the main body base 1 at the tip. Is installed as. Reference numeral 10 is a take-up reel gear, and 11 is a rewind reel gear. Reference numeral 12 is a guide hole formed in the main body base 1, in which a pinch roller shaft 14a is arranged, and is pulled in the direction of the capstan shaft 16 by a spring 15 pulling the substrate 13,
The shaft 14a of the pinch roller 14 is the drive arm 7 during recording / playback.
It is disengaged from the semi-circular cam 18 formed in the above and is pressed against the capstan shaft 16. When the drive arm 7 is rotating, the pinch roller shaft 14a is pushed outward by the cam 18 to keep the pinch roller 14 separated from the capstan shaft 16, and when the drive arm 7 reaches the both end positions, the pinch roller The shaft 14a is disengaged from the cam 18, and the pinch roller 14 is brought into pressure contact with the capstan shaft 16.

 Next, the operation will be described.

1 and 4, the drive gear 8 meshes with the take-up reel gear 10, the pinch roller shaft 14a is disengaged from the cam 18, the pinch roller 14 is pressed against the capstan shaft 16, and the tape is wound at the standard speed for recording. -Playback is being performed.

When the winding of the tape is completed and the motor 2 is rotated in the reverse direction, the drive arm 7 slightly rotates counterclockwise as shown in FIGS. 2 and 5, meshes with the fixed gear 9, and forcibly rotates counterclockwise. The drive gear 8 meshes with the rewind reel gear 11. At this time, the pinch roller shaft 14a is disengaged from the cam 18 and the board 13 is moved to the spring 1
Since it is pulled at 5, the pinch roller 14 comes into pressure contact with the capstan shaft 16 and the tape is rewound in the opposite direction, and recording / playback is performed.

Next, the substrate 13 is pulled against the elastic force of the spring 15 manually or by other means, and the pinch roller shaft 14a is locked to the lock claw 20 as shown in FIGS.
The cam 18 does not come into contact with the pinch roller shaft 14a even if is rotated in the forward and reverse directions, so that fast winding can be performed.

In the above embodiment, the capstan shaft is a single type, but when the capstan shaft is a double type, the capstan shaft may be applied to each capstan shaft as it is.

(Effect) According to the present invention, a capstan shaft and a flash wheel gear are fixed to a flywheel, a drive arm is attached to the flywheel gear, and a drive gear that meshes with the flywheel gear is attached to the tip of the drive arm. A base plate in which a fixed gear that meshes is arranged on the main body base, the drive arm is rotated by the meshing of the drive gear and the fixed gear by reversing the flywheel, and the cam of the drive arm is engaged and interlocked while the drive arm is rotating. The pinch roller arranged in the above is separated from the capstan shaft, the drive gear disengages from the fixed gear,
At the time of meshing with the reel gear or the rewind reel gear, the pinch roller is pressed against the capstan shaft to wind up the tape, and the recording / playback state is set, and the drive arm reversely rotates by reversing the flywheel, and the cam of the drive arm,
By only interlocking the board with the pinch roller, the pinch roller can be put in and out of contact with the capstan shaft to record and play in the opposite direction, so there is no need for a complicated mechanism as in the past and the number of parts is reduced. The number can be significantly reduced, and the auto reverse tape recorder can be provided at a low cost with an extremely simple mechanism.

[Brief description of drawings]

FIG. 1 is a plan view of recording and reproducing according to an embodiment of the present invention, FIG. 2 is a plan view of the same rewinding, FIG. 3 is a plan view of the same early winding, and FIG. 4 is a main part of FIG. An enlarged plan view, FIG. 5 is an enlarged plan view of an essential part of FIG. 2, FIG. 6 is an enlarged plan view of an essential part of FIG. 3, and FIG. 7 is a plan view of the conventional device during recording and reproduction. 1 ... Main body base, 2 ... Motor, 4 ... Flywheel 6 ... Flywheel gear, 7 ... Drive arm, 8 ... Drive gear 9 ... Fixed gear, 10 ... Take-up reel gear, 11 ... Rewind reel gear 12 …… Guide hole, 13 …… Substrate, 14 …… Pinch roller 14a …… Pinch roller shaft, 15 …… Spring 16 …… Capstan shaft, 18 …… Cam 19 …… Engagement stage, 20… … Lock claws

Claims (1)

[Claims] 1. A capstan shaft and a flywheel gear are fixed to a flywheel, a drive arm is attached to the flywheel gear, and a drive gear that meshes with the flywheel gear is attached to the tip of the drive arm, and the drive gear meshes. The fixed gear is mounted on the main body base, and the drive arm is rotated by the engagement of the drive gear and the fixed gear by reversing the flywheel. When the pinch roller is separated from the capstan shaft and the drive gear is disengaged from the fixed gear and meshes with the reel gear or the rewind reel gear, the pinch roller is pressed against the capstan shaft to wind the tape and record / playback state. Then, the drive arm was rotated reversely by reversing the flywheel, and the cam of the drive arm and the pinch roller were arranged. Only interlock plate, auto-reverse tape recorder, characterized in that the pinch roller and the recording-playback state of the capstan shaft and away against the opposite direction.