JPS59152553A - Reel shaft driver of tape recorder - Google Patents

Abstract

PURPOSE:To use a transmission gear for rapid traverse is common to a transmission gear for reproduction and to simplify the constitution of the reel shaft driver of a tape recorder, by displacing the rotary shaft of a motor in its axial direction to switch a revolution transmitting mechanism to the reel shaft. CONSTITUTION:In a stop of rapid traverse mode, a tilt control part 16a is separated from the tip part 2a of a rotary shaft 2 since a slide substrate 16 is not active. Therefore, the rotary shaft 2 of a motor 1 is displaced toward the arrow mark A, and the 1st transmission gear 8 engages the tooth 14a of a reel drive disk 14. Thus the revolutions of the shaft 2 are transmitted to a take-up reel shaft 15 to perform the rapid traverse of a magnetic tape. In a reproduction mode the substrate 16 is displaced toward the arrow C where the substrate 16 is active, and the part 16a pushes the shaft 2 toward the arrow mark B. As a result, a rotary arm 4 is displaced toward the arrow B in resisting the force of the 1st spring 5. Thus the 2nd transmission gear 9 engages the tooth 14a, and the revolutions of the shaft 2 is transmitted to the take-up reel shaft 15. Then the magnetic tape is reproduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a tape recorder, and particularly to a reel shaft drive device.

(b) Conventional technology The reel shaft driving operations in tape recorders include driving operations for playback or recording operations, driving operations for fast forwarding operations, and driving operations for rewinding operations, and tape recorders do not perform such driving operations. It is equipped with a drive mechanism for operation. Conventional tape recorders have a mechanism for driving the reel shaft for each operation, and therefore have the disadvantage of having a complicated structure.

(c) Object of the Invention The present invention seeks to provide a reel shaft drive device with an extremely simple configuration.

B) Structure of the Invention The present invention uses gears as a means for transmitting the rotation of the electric motor to the reel shaft, and switches the drive mechanism by axially displacing the rotating shaft of the electric motor.

(E) Embodiments The drawings are all related to the present invention; FIG. 1 is a side sectional view of the main parts showing a stop or fast-forward state, and FIG. 2 is a side sectional view of the main parts showing the playback state. In the figure, (1) is an electric motor that starts rotating when power is supplied when a playback operation or fast forward operation is performed, and it moves toward the rotating shaft that can be slightly displaced in the axial direction, that is, in the direction of arrows (Δ) and (B). (2), (3) is a driving gear press-fitted and fixed to the rotating shaft (2), and (4) is a rotating gear that is rotatably attached to the rotating shaft (2) as a fulcrum. The arm is disposed between the drive gear (3) and the motor body (1a). (5) is the rotation arm of the drive shaft (2).
, (4) is a first sub△ ring which is inserted between the motor main body (1a) and has the function of biasing the rotating arm (4) in the direction of arrow (A) t2 ing. The force applied to the rotational arm (4) by the front d11 first spring (5) is applied to the drive gear (3), and as a result, the rotating shaft (2) moves in the direction of the arrow (
A) Direction: ＼It is in an energized state. (6) is a rotation center shaft rotatably attached to the rotation arm (4);
7) is a fixing member that is press-fitted into the rotation center shaft (6), and (8) is rotatably attached to the fixing member (7), and is in constant mesh with the drive gear (3) together with L. The first transmission gear in the state, (9) is the rotation center axis (6)
The second transmission gear is press-fitted into the second transmission gear, θ·O is the felt interposed between the first transmission gear (8) and the second transmission gear (9), and (11) is the fixing member (7). a second spring having an end fixed to the first transmission gear (
8) in the direction of arrow (5). In such a configuration, the first transmission gear (8), the second transmission gear (9), the felt (10 and the second spring 0])
Configure the clutch mechanism. That is, the rotation transmitted to the first transmission gear (8) by the drive gear (3) is transmitted to the second transmission gear (9) K via the felt (m).
) is a spindle fixed to the fixed board CI3, and a reel stand rotatably attached to the spindle θ,
The take-up reel shaft QQ is integrally formed, and teeth (14a) that mesh with the first transmission gear (8) or the second transmission gear (9) are formed on the peripheral edge thereof. oQ is a sliding board on which a magnetic head etc. is attached (a) and is displaced in the direction of the arrow (0) which is the operating position by the playback operation, and at its end is the tip (2a) of the rotating shaft (2).
The rotating shaft (2) is applied with the biasing force of the first spring (5) 2. A tilt control section (16a) is formed on the opposite side of the take-up reel shaft (IQ) for displacing it in the direction of arrow B1. At the same time, a reel stand identical to the reel stand θ is formed on the unwinding reel shaft.Furthermore, an electric motor (1)
The direction of rotation of the tape is configured to be switched to the opposite direction during the rewinding operation.

As described above, the reel shaft drive device of the present invention is constructed, and the VC operation will be explained next. The state shown in FIG. 1 is a stopped or fast-forward state, and in such a state, the tilt control unit (16a
) is spaced apart from the tip (2a) of the rotating shaft (2). Therefore, the rotating shaft (2a) of the electric motor (1) is displaced in the direction of the arrow (Δ) by the biasing force of the first spring (5), and the first transmission gear (8) is connected to the reel. It is in a state of meshing with the teeth ( ], 4a) of the stand (14). In such a state, if you perform a fast forward operation, the electric motor (
1), and the rotating shaft (2) starts rotating. When the rotating shaft (2) rotates, the driving gear (3) is press-fitted into the rotating shaft (2) and rotates integrally (1), so that the rotating shaft (2) is always in mesh with the driving gear (3). The rotation from the drive gear (3) is transmitted to the first transmission gear (8), but the rotation to which the first transmission gear (8) is attached is transmitted to a certain first transmission gear (8). Moving arm (4)
receives rotational force in the rotational direction of the drive gear (3) with the rotation shaft (2) as a fulcrum. As a result, the rotating arm (
4) is rotationally displaced, and the first transmission gear (8) becomes in mesh with the teeth (14a) of the reel base 0 (a). Therefore, in such a state, the rotation of the rotating shaft (2) of the electric motor (1) is caused by the rotation of the driving gear (3), the first transmission gear (8), and the reel stand 04.
) to the take-up reel axis a→, and the magnetic tape is rapidly forwarded.

As described above (the fast forward operation is performed, the rewind operation will be explained next. When the rewind operation is performed, the rotation direction of the electric motor (1) is switched to the opposite direction to that during the fast forward operation. The rotation direction of the electric motor (1) The drive gear (3) is reversed.
) and the rotation direction of the first transmission gear (8) is 1. opposite to the fast forward operation. [When the rotary arm (4) is rotated in the opposite direction ((rotational displacement), the first transmission gear (8) is unwound, and the teeth of the reel base (not shown) forming the IJ-role shaft are rotated. 1.C to the state where it is engaged with.

Therefore, the rotation of the rotating shaft (2) of the electric motor (1) is caused by the rotation of the drive gear (
3) The rewinding operation of the magnetic tape is performed on the rewinding reel shaft via the first transmission gear (8) and the reel stand.

As explained above, the forwarding and rewinding operations are performed according to the present invention, but the reproducing operation will now be explained. When the playback operation is performed, electric power is supplied to the electric motor (1,) K, and the rotating shaft (2) rotates in the same direction as during the fast-forward operation, and the sliding board (lf9 is the operating position arrow (C)
) direction2). When the sliding substrate OG is displaced to the operating position, the tilt control section (16a) comes into contact with the tip (2a) of the rotating shaft (2) 2 and presses the rotating shaft (2) in the direction of the arrow (Y3). The rotation l111 (2) is indicated by the arrow (■3
) direction -\ The rotation r-arm (4
) is acted on by a pressing force in the direction of arrow B1, so the rotating arm (4) is displaced in the direction of arrow Bj against the biasing force of the first spring (5).

FIG. 2 shows a state in which the rotating arm (4) is displaced in the direction of the arrow (r3), and in this state, the second transmission gear (9) is connected to the teeth (14'a) of the reel stand α→. ) Ic is in a state of engagement. Therefore, by regeneration operation the electric motor (1)
When power is supplied to the rotary arm (4), the rotary arm (4) changes its rotation due to the rotational force of the drive gear (3) caused by the rotation of the rotary shaft (2).
position, and the second transmission gear (9) is connected to the teeth (14) of the reel stand (B).
It will be in a state where it meshes with a). Rotating shaft (2) of electric motor (1)
) is transmitted from the drive gear (3) to the first transmission gear (8), and the rotation of the first transmission gear (8) is transmitted to the second transmission gear (9) via the felt 00 constituting the clutch mechanism. be communicated to. The second transmission gear (9) is transmitted to the take-up reel shaft through the teeth (14a) of the rotary gear 1) and the θ station, and is driven for reproduction of the magnetic tape. In this way, the drive operation of the take-up reel shaft θ9 of the regeneration reservoir is performed, but when the regeneration operation is canceled by the stop operation, the sliding board (1 (9 is arrow (I)) direction that was in the operation position is moved. It is displaced and becomes the state shown in Fig. 1. That is, the sliding substrate O
When Q is displaced f in the direction of arrow (I), the tilt control section (16a
) is separated from the tip (2a) of the rotating shaft (2), so the pressing force of the rotating shaft (2) in the direction of the arrow ([3) is eliminated, and as a result, the rotating shaft (2) is moved away from the first spring (2a). It is displaced in the direction of the arrow (Δ) by the biasing force 5). After such an operation is performed, the drive mechanism comes to a stopped state as shown in FIG. 1 at ft.

As shown below, each operation in this embodiment is performed, but by reversing the rotational direction of the reproducing operation special electric motor (1), it is possible to drive the reel shaft for reproducing in the opposite direction. However, the drive mechanism of the present invention can also implement a bidirectional playback function in a fixed length tape recorder.

(f) Effects of the Invention The drive device of the present invention not only changes the rotation transmission mechanism to the reel shaft by displacing the rotating shaft of the electric motor in the axial direction, but also regenerates the transmission gear for fast forwarding. It has the feature that the structure is extremely simple because it is also used as a transmission gear for.

[Brief explanation of drawings]

The drawings relate to the drive device of the present invention; FIG. 1 is a side sectional view of the main part showing the stop or fast-forward state, and FIG. 2 is a side sectional view of the main part showing the playback state. Explanation of main drawing numbers (1)...Electric motor, (2)...Rotating shaft, (3)
... Drive gear, (4) ... Rotating arm, (5) ...
・First spring, (8)...first transmission gear, (
9)...Second transmission gear, (10...Felt,
(1])...Second spring, θ4)...Reel stand, Oe...Take-up reel shaft, (lf9...Sliding board, (16a)...Inclination control unit.

Claims (1)

[Claims] (1) A jJ electric motor whose rotating shaft is configured to be displaceable in the axial direction, a drive gear press-fitted and fixed to the rotating shaft of the motor, and a rotating arm that is attached to be rotatable about the rotating shaft as a fulcrum. , a first rotatably mounted on the pivot arm and in constant mesh with the drive gear;
a transmission gear, a second transmission gear that is rotatably mounted coaxially with the first transmission gear (with the rotation of the first transmission gear being transmitted via a clutch mechanism); a reel base having teeth that selectively mesh with the second transmission gear and forming a reel shaft together with the second transmission gear; the reel base meshes with the teeth of the reel base by displacement in the axial direction of the rotating shaft of the electric motor; The gears are connected from the first transmission gear to the second transmission gear, and from the second transmission gear to the first transmission gear.
・Cheebre characterized by being able to switch: 1
-Goo's reel shaft drive device.