JPH01192044A - Tape take-up mechanism for tape recorder - Google Patents

Abstract

PURPOSE:To make the title recorder small in size and light weight by positioning the tip gear of a planetary gear string at the intermediate part of two gears connected to two reel boards and whose interval is larger than the diameter of the gear at the tip of the planetary gear string. CONSTITUTION:The gear 3 connected directly to the rotary shaft 2 of a capstan 1 is rotated in a direction of A, and the planetary gear 4 engaging with the gear 3 is rotated in a direction of B. A rotary piece 7 mounted so as to be turned freely between the fears 3 and 4 by the reaction of rotation in a reverse direction centering the position of the rotary shaft 2 is inclined in a direction of D. And the gear 6 is engaged with the gear 11 connected to the reel board 9. As a result, the gear 11 is rotated in the direction of A, and the reel board 9 and a reel 19 are rotated in a direction of A', then, take up a tape 20 sent in a direction C. By permitting the current of a motor 12 to flow in the reverse direction, each part performs motion as shown in arrow head of dotted line, and is inclined in a direction of E by the reaction of the rotation in the reverse direction of the rotary piece 7, the gears 3 and 4, then, the gear 6 is brought into contact with the gear 10, and the tape 20 is fed in a direction F, then, it is taken up on the reel 18.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention (10) relates to a Rabe winding mechanism for a tape recorder, and particularly relates to a mechanism for winding a tape by switching to one of the reels depending on whether the running direction of the tape is forward or backward. It is something.

Conventionally, various proposals have been made regarding mechanisms for switching to one of the reels and winding the tape depending on whether the running direction of the tape is forward or backward.

On the other hand, there is a strong need for tape recorders to be smaller and lighter, and there is a need for a tape winding mechanism that can meet these needs.

ga and 1. It is an object of the present invention to provide a tape winding mechanism that requires only a small number of parts and a small space, and that operates reliably in a tube.

3. Configuration 1 of the Invention The tape winding mechanism of the tape recorder according to the present invention of tt- freely rotates a gear directly connected to the rotating shaft of the capstan around the position of the rotating shaft of the capstan. It meshes with a planetary gear train consisting of an odd number of gears provided on a rotary piece attached as shown in FIG. It is characterized by having a structure in which the gear at the tip of the planetary gear train is located between two larger gears.

This will be explained in detail with reference to the accompanying drawings. FIG. 1A is a plan view of a tape recorder having a tape winding mechanism of the present invention, FIG. 1B is a side view as seen from the X direction of FIG. 1A,
FIG. 1C is a back view.

A gear 3 is directly connected to the rotating shaft 2 of the capstan l. Further, a rotating piece 7 is attached so as to freely rotate around the position of the rotating shaft 2 of the capstan, and the rotating piece 4 is made up of an odd number of gears 4, 5. A planetary gear train is provided, and a gear 3 directly connected to the rotating shaft of the capstan is meshed with a gear 4 at the bottom of the planetary gear train.

On the other hand, between two gears 10 and 11 which are connected to the two reel stands 8 and 9 installed side by side and whose mutual spacing is larger than the diameter of the gear 6 at the tip of the planetary gear train, This is the structure in which the gear 6 is positioned. It is assumed that the reel stand 8.9 has a built-in slip mechanism.

In addition, symbol 12 is a DC motor, symbol 13 is a motor pulley, symbol 14 is a capstan belt, symbol 15 is a flywheel, symbol 16 is a pinch roller, symbol 17 is a magnetic head, symbols 18 and 19 are take-up reels, symbol 20 indicates tape.

The rotary shaft 2 of the capstan l is rotated by a motor pulley 13 attached to the rotary shaft of the DC motor 12, a capstan belt 14, and a flywheel 15 attached to the rotary shaft 2, and is supplied to the DC motor 12. It can be rotated in the forward or reverse direction by changing the direction of the current.

Taking as an example the case where the DC motor 12 rotates in the direction of the solid arrow A in FIG. 1C, the flywheel 15 also rotates in the direction of the solid arrow A, and the capstan l rotates in the direction of the solid arrow A' in FIG. 1A. The tape 20 is fed in the direction of the solid arrow C.

On the other hand, the gear 3 directly connected to the rotating shaft of the capstan rotates in the same direction as the solid line arrow A as the flywheel 15, and the planetary gear 4 meshing with it rotates in the opposite direction as shown by the solid line arrow B. Due to the reaction force of the rotation in the opposite direction between the capstan and the gear 4, the rotating piece 7, which is attached to freely rotate around the position of the rotating shaft 2 of the capstan, tilts in the direction indicated by the solid line arrow, and the planetary gear The gear 6 at the tip of the row contacts and meshes with the gear ll connected to the reel stand 9. As a result, the gear 11 rotates in the direction shown in FIG. 1A, and the reel stand 9 and reel 19 rotate as shown by the solid arrow A' in FIG. In this case, the reel stand 8 is not restrained by the movement of the motor 12 at all.

If the direction of the current supplied to the DC motor 12 is reversed, each part will move as shown by the dotted arrow, and the rotating piece 7 will move as shown by the gear 3.
Due to the reaction force of the rotation in the opposite direction between the gear 4 and the gear 4, the gear 6 tilts in the direction of the arrow E, and the gear 6 at the tip of the planetary gear train comes into contact with the gear IO connected to the reel stand 8 and meshes with it.

Since the rotation of the capstan L is also in the opposite direction, the tape 20
is sent in the direction of the dotted arrow F and is wound up by the reel 18.

In this way, the reel stand on the take-up reel side is automatically driven as the rotation direction of the capstan l is changed.

The tape winding mechanism of the present invention can be applied to both cassette tape recorders and reel-to-reel tape recorders.

C.6 Effects of the invention Since it can be constructed compactly with a small number of parts, only a small space is required, and it is convenient for making tape recorders smaller and lighter.

[Brief explanation of the drawing]

FIG. 1A is a plan view of a tape recorder having a tape winding mechanism of the present invention, FIG. 1B is a side view as seen from the X direction of FIG. 1A, and FIG. 1C is a back view.

Claims (1)

[Claims] A gear directly connected to the capstan's rotation axis is meshed with a planetary gear train consisting of an odd number of gears installed on a rotating piece attached to freely rotate around the position of the capstan's rotation axis. The gear at the tip of the planetary gear train is located between two gears that are connected to two reel stands and whose mutual interval is larger than the diameter of the gear at the tip of the planetary gear train. A tape winding mechanism of a tape recorder characterized by the following.