JPH087906B2 - Tapered reel shaft drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a reel shaft driving device of a tape recorder suitable for performing bidirectional recording / playback.

(B) Conventional technology In a bidirectional recording / playback type tape recorder, when recording or playing in the forward direction, one of the left and right reel shafts is rotated at a low speed and the tape driven at a constant speed by a pinch roller and a capstan is wound up and recorded in the opposite direction. Alternatively, during playback, the reel shaft on the side different from the one described above is rotated in the opposite direction to wind up the tape driven at a constant speed by the pinch roller and capstan, and at the time of fast winding or fast rewinding, the reel shaft is driven at high speed. It is necessary to rotate and wind the tape early. In order to perform such a switching operation, as described in Japanese Patent Publication No. 56-48899, for example, a winding gear for driving a reel shaft is provided on a rocking metal fitting, and the rocking metal fitting is used for switching pinch rollers. By swinging with a lever, the winding gear is selectively meshed with a gear having one reel shaft to rotate the reel shaft to rewind the tape. Further, a gear for performing fast winding or fast rewinding of the tape is mounted on the rocking plate, and at the time of fast rewinding, the rocking plate is swung by the fast rewinding lever so that the gear for fast rewinding is mounted on the reel shaft. The tape is wound by meshing with a gear and rotating the reel shaft at a high speed.

(C) Problems to be Solved by the Invention In a conventional bidirectional recording / playback type tape recorder, a winding gear meshing with gears on left and right reel shafts and a gear for fast winding or fast rewinding are separately provided. The mechanism is complicated because it is attached to a rocking plate, and the rocking plate is rocked by a reproduction lever or a fast-forwarding lever to mesh each gear with a gear having a reel shaft.

The present invention provides a reel shaft driving device for a tape recorder in which such drawbacks are eliminated.

(D) Means for Solving the Problems A reel shaft driving device for a tape recorder according to the present invention includes first and second reel shafts coaxially provided with first and second reel gears having different diameters, First and second main drive gears coaxially provided on the chassis and having different diameters, a reversing rewinding gear always meshed with the first main drive gear and mounted on the chassis, and first and second directions A first winding gear slidably mounted on the first winding gear, a second winding gear constantly meshing with the first winding gear, and a gear mounting substrate provided with first and second fast winding gears, respectively. It

(E) Action Since the reel shaft driving device of the tape recorder of the present invention has the above-mentioned configuration, the gear mounting substrate in which the first winding gear and the second driving gear mesh with each other is in the first-direction sliding state. Then, by rotating the gear mounting substrate in either the left or right direction, the rotational force of the second drive gear is changed to the first rotational force via the first winding gear or the first winding gear and the second winding gear.
Alternatively, the tape is wound at a low speed by being transmitted to the second reel shaft to rotate at a low speed for recording or reproduction, and the second winding gear and the second drive gear do not mesh with each other, in the sliding state of the gear mounting substrate in the second direction, When the gear mounting substrate is slid in either the left or right direction, the rotational force of the first drive gear is transmitted to the first or second reel shaft via the first or second fast winding gear and these reel shafts are moved. Rotate at high speed to fast-rewind or fast-wind the tape.

(F) Embodiment An embodiment of the reel shaft driving device of the tape recorder of the present invention will be described with reference to the drawings.

In the figure, (1) is a first drive gear, (2) is a second drive gear having a smaller diameter than the first drive gear (1), and the first and second drive gears (1) and (2) are chassis (3). ) Is attached to the upper rotary shaft (4) so as to be integrally driven by a motor (not shown). (5) and (6) are the large diameter first
Reel gears (7) (8) and second diameter small reel gear (9)
The first and second reel shafts (10) are provided, and the chassis (3) so that (11) always meshes with the first reel gear (7) provided on the left first reel shaft (5). Top axis (1
As shown in FIG. 6, the reversing rewinding gear pivotally supported on 2) is made rotatable by the rotation shaft (4) penetrating the elongated hole (13a) as shown in FIG. A gear mounting board slidably mounted in a first direction shown by an arrow (A) and a second direction shown by an arrow (B) opposite to the first direction. A second winding gear (15) that meshes with the first winding gear (14), and first and second fast winding gears (16) (17) provided on the upper and left projections. . Reference numeral (18) is a tape running direction switching lever for switching between forward and reverse directions, and a bifurcated portion (19) at the tip is pivotally supported on the rotary shaft (4). Reference numeral (20) is a speed switching lever for switching between high speed and low speed, the center of which is supported by the reel shaft (6) and the end of which is fixed to the gear mounting substrate (13). In the first winding gear (14), the gear mounting substrate (13) has an arrow (A).
The second reel shaft on the right side meshes with the second drive gear (2) having a small diameter when it is slid in the first direction, and the gear mounting substrate (13) is rotated counterclockwise in this state. When meshing with the first reel gear (8) in (6) and rotating the gear mounting substrate (13) clockwise, the second winding gear (15)
Is arranged so as to mesh with the first reel gear (7) provided on the left first reel shaft (5), and the first and second fast winding gears (16) (17) are mounted on the gears. When the substrate (13) is slid in the second direction and rotated counterclockwise or clockwise, the second reel shaft (5) and the second reel shaft (6) are respectively moved to the second direction.
It is arranged so as to mesh with the reel gears (9) (10).

Next, the operation of the reel shaft driving device of the tape recorder of the present invention will be described.

(1) Stopped state In the stopped state, as shown in Fig. 1, the gear mounting board (13)
Is in the neutral position and the first and second reel shafts (5) (6)
The first and second reel gears (7) and (8) respectively
(9) None of the gears of (10) mesh.

(2) First direction playback (recording) When the first direction playback button is pressed in the stopped state, the playback lever (23) hits the inclined surface (25) of the arm piece (24) of the tape running direction switching lever (18), Since the tape running direction switching lever (18) is rotated counterclockwise as shown in FIG. 2, the tape running direction switching lever (18) is rotated by the shaft (2
6) is pressed and the gear mounting substrate (13) is rotated counterclockwise to engage the first winding gear (14) with the first reel gear (8). Therefore, the second drive gear (2) is driven counterclockwise by the motor rotated by pressing the first direction reproduction button, and the first winding gear (14) meshed with the second drive gear (2). ) Is rotated clockwise, and further the first reel gear (8) meshing with the first winding gear (14) is rotated, thereby rotating the second reel shaft (6) counterclockwise. On the other hand, at this time, the pinch roller on the right side is pressed against the capstan, the pinch roller and the capstan make the tape run at a constant speed, and the tape run at the constant speed is fitted to the second reel shaft (6) and rotated. It is wound around the reel hub to be reproduced in the first direction.

(3) Second direction reproduction (sound recording) The gear mounting board (13) is operated by the automatic reversing device after the reproduction in the first direction is completed up to the end of the tape or manually.
When is rotated clockwise, the second winding gear (15) meshes with the first reel gear (7) of the first reel shaft (5). Therefore, the driving force of the second drive gear (2) is transmitted to the first reel gear (7) via the first and second winding gears (14) and (15), and the first reel shaft (5) is reversed to the above. Rotate in the direction.
At this time, the pinch roller on the left side is pressed against the capstan,
The pinch roller and the capstan are used to run the tape at a constant speed in the second direction for reproduction. Then, the tape running at the constant speed is wound around the reel hub rotated by the first reel shaft (5).

(4) Review operation It is sometimes desired to perform a rewinding operation of the tape, that is, a so-called review operation, during reproduction in the first direction or the second direction. For example, when a rewind lever (not shown) is pressed to perform a review operation during reproduction in the second direction shown in FIG. 3, the speed switching lever (20) is rotated counterclockwise and the gear mounting board ( 13) is slid in the second direction shown by the arrow (B) to separate the first winding gear (14) from the second drive gear (2). On the other hand, since the gear mounting substrate (13) was regenerated in the second direction, it is rotated clockwise, and when it is slid in the second direction, as shown in Fig. 4, the second pre-winding gear (17). Mesh with the first drive gear (1) and the second reel gear (10). Therefore, the driving force of the first drive gear (1) rotated by the motor is transmitted to the second fast winding gear (17) and the second reel gear (10) to rotate the second reel shaft (6). The second fast winding gear (17) has a smaller diameter than the first winding gear (14),
Since the reel gear (10) has a smaller diameter than the first reel gear (8), the second reel shaft (6) is rotated at a high speed. Moreover, at this time, since the pinch roller is separated from the capstan, the reel hub fitted to the second reel shaft (6) is rotated at a high speed to rewind the tape.

Similarly, when the rewind button is pressed during the reproduction in the first direction, the speed switching lever (20) is rotated counterclockwise, and the gear mounting substrate (13) is slid in the second direction as described above, Since the mounting substrate (13) is rotated in the counterclockwise direction, the first pre-winding gear (16) has a reverse rewinding gear (11) and a second reel gear (9) as shown in FIG. Mesh with each other. Therefore the first
The driving force of the driving gear (1) is the reverse rewinding gear (11), the first
It is transmitted to the first reel shaft (5) via the fast winding gear (16) and the second reel gear (9) to rotate the first reel shaft (5) at a high speed to wind the tape fast.

(5) Rewinding or fast-forwarding To fast-forward or rewind the tape from the stopped state described above, the speed switching lever (20) is rotated counterclockwise and the gear mounting substrate (13) is slid in the second direction. At the same time, it is necessary to rotate the gear mounting substrate (13).
However, when the speed switching lever (20) is brought into the regenerating state, it is interlocked with a sliding substrate (not shown) that moves the gear mounting substrate (13) to the second direction sliding state when in the stopped state. If the gear mounting board (13) is positioned in the first direction sliding state shown by the arrow (A) when in the regenerated state, it is only necessary to rotate the gear mounting board (13) left and right. Switching between first-direction reproduction and second-direction reproduction and switching between fast-forward and fast-rewind can be performed.

That is, in the stopped state, the gear mounting board (13) is slid in the second direction shown by the arrow (B), and if the gear mounting board (13) is rotated clockwise, as shown in FIG. The two fast take-up gears (17) mesh with the first drive gear (1) and the second reel gear (10) to rotate the second reel shaft (6) at high speed as described above, and to rotate the second reel shaft (6). The reel hub meshing with 6) also rotates at high speed to wind the tape at high speed.

When the gear mounting substrate (13) is rotated counterclockwise while the gear mounting substrate (13) is stopped in the second direction, as shown in FIG. ) Meshes with the second reel gear (9) and the reversing rewinding gear (11) of the first reel shaft (5) and rotates the first reel shaft (5) at a high speed to rotate the tape in the opposite direction to the above. Take up.

If you press the 1st playback direction button to perform playback in the 1st direction,
A sliding substrate having a reproducing head and the like is interlocked with the operating position, and accordingly, the gear mounting substrate (13) also slides in the first direction so that the first winding gear (14) meshes with the second drive gear (2). , The inclined surface (2) of the arm piece (24) of the tape running direction switching lever (18)
In step 5), the tape running direction switching lever (18) is rotated counterclockwise as shown in FIG. 2, whereby the gear mounting substrate (13) is also rotated counterclockwise, and the first winding gear is rotated. (14) The first reel gear (8) of the second reel shaft (6) runs the meshing tape at a low speed, and the reproduction is performed in the same manner as described above.

(G) Effect of the Invention As described above, the reel shaft driving device of the tape recorder of the present invention has the first and second winding gears and the first and second high speed gears mounted on the gear mounting substrate that is slidable and rotatable. Since the take-up gear is provided, it is possible to switch to forward reproduction or recording, or to switch to fast winding or fast rewinding only by selectively swinging or rotating the gear mounting substrate. Therefore, the mechanism for switching these becomes extremely simple.

[Brief description of drawings]

The drawings are all plan views showing an embodiment of the reel shaft driving device of the present invention. FIG. 1 is a stopped state, FIG. 2 is a first direction reproduction state,
FIG. 3 shows the second direction reproduction state, FIG. 4 shows the first direction fast winding state, FIG. 5 shows the second direction fast winding state, and FIG. 6 shows the essential parts. Description of main drawing numbers (1) …… First drive gear, (2) …… Second drive gear,
(5) ... 1st reel shaft, (6) ... 2nd reel shaft,
(7) (8) …… First reel gear, (9) (10) …… Second reel gear, (11) …… Inverse rewinding gear, (13) ……
Gear mounting board, (14) …… First winding gear, (15) ……
Second take-up gear, (16) …… First fast take-up gear, (17)
...... Second fast winding gear.

Claims (1)

[Claims] 1. A first reel gear (7) and a second reel gear (7) having different diameters.
A first reel shaft (5) coaxially provided to rotate integrally with a reel gear (9) and a first reel shaft (5) having a different diameter.
The reel gear (8) and the second reel gear (10) are coaxially provided so as to rotate integrally, and the first reel gear (8) and the first reel gear (10) are also provided.
A second reel shaft (6) forming a pair with the reel shaft (5), a first drive gear (1) coaxially provided on the chassis (3) for rotating integrally, and having different diameters; Second
A driving gear (2), a reversing rewinding gear (11) rotatably mounted on the chassis (3) and in a state of always meshing with the first driving gear (1);
Mounting board (1) which is provided so as to be displaceable in the first direction and the second direction and is capable of being rotationally displaced (1
3) and a first rotatably mounted on the gear mounting substrate (13), which meshes with the second drive gear (2) when the gear mounting substrate (13) is displaced in the first direction. The first take-up gear (1) is rotatably provided on the take-up gear (14) and the gear mounting substrate (13).
Second winding gear (15) that is in constant mesh with 4)
And when the gear mounting board (13) is rotatably provided and the gear mounting board (13) is displaced in the second direction and is rotationally displaced counterclockwise, Second reel gear (9) and reverse rewind gear (1
A first pre-winding gear (16) meshing with 1) and the gear mounting substrate (13) are rotatably provided and the gear mounting substrate (13) is displaced in a second direction, and The gear mounting board (13) comprises the second reel gear (10) and a second fast winding gear (17) which meshes with the first drive gear (1) when being rotationally displaced in the clockwise direction.
When the second drive gear (2) and the first winding gear (14) are displaced in a first direction in which they mesh with each other, when the gear mounting substrate (13) is rotationally displaced in the counterclockwise direction, the first By engaging the take-up gear (14) with the first reel gear (8), the rotational force of the second drive gear (2) is passed through the first take-up gear (14) and the first reel gear (8). Is transmitted to the second reel shaft (6) to rotate the second reel shaft (6) at a low speed, so that the gear mounting substrate (13) and the first drive gear (2) and the first take-up coil are wound. When the gear mounting substrate (13) is rotationally displaced in the clockwise direction in a state where it is displaced in the first direction in which the gear (14) meshes with the gear (14), the second winding gear (15) is moved to the first reel gear (7). The rotational force of the second drive gear (2) is meshed with the first winding gear (14) and the second winding gear (15). And via the first reel gear (7) to the first reel shaft (5) to rotate the first reel shaft (5) at a low speed, and the gear mounting substrate (13) causes the second reel shaft (5) to move to the second reel shaft (5). When the drive gear (2) and the first winding gear (14) are displaced in the second direction in which they do not mesh with each other, when the gear mounting substrate (13) is rotationally displaced in the counterclockwise direction, the first fast winding is performed. By engaging the gear (16) with the second reel gear (9) and the reversing rewinding gear (11), the rotational force of the first drive gear (1) is transferred to the reversing rewinding gear (11), the first high speed gear. It is transmitted to the first reel shaft (5) via the take-up gear (16) and the second reel gear (9), whereby the first reel shaft (5) is rotated at a high speed, and the gear mounting board ( In the state in which 13) is displaced in the second direction in which the second drive gear (2) and the first winding gear (14) do not mesh, When the gear mounting substrate (13) is rotationally displaced in the clockwise direction, the second pre-winding gear (17) is connected to the second reel gear (1
0) and the first drive gear (1) are meshed with each other so that the rotational force of the first drive gear (1) is transmitted through the second fast winding gear (17) and the second reel gear (10). Second
It is transmitted to the reel shaft (6), and thus the second reel shaft (6)
A reel shaft driving device for a tape recorder, wherein the reel is driven at a high speed.