JPH0514980B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a reel stand drive device for a tape recorder equipped with a reverse device.

BACKGROUND OF THE INVENTION In recent years, tape recorders have been required to be smaller, lighter, and thinner, and also to be capable of reverse recording.

Conventionally, a reel stand drive device in a tape recorder has been designed to control the rotation of each tape in its running state, i.e., winding when the tape is running at a constant speed in forward and reverse directions, winding when running at high speed, and even during high-speed rewinding. The power is obtained from the reel stand. The power transmission methods for this purpose include a method in which the motor that is the drive source is switched between low speed and high speed, and a mechanism switching method in which the motor is rotated at a constant speed and the power transmission path from the motor to the reel stand is switched depending on the running state of each tape. The method is known.

Problems to be Solved by the Invention However, all of these conventional devices have complicated mechanisms for reverse operation, resulting in large devices, and the large number of component parts, resulting in poor reliability and ease of assembly. There were many issues that remained.

Means for Solving the Problems The present invention provides a method for winding tape from one drive rotor that rotates at a substantially constant speed in a forward rotation constant speed running state, in a reverse rotation constant speed running state, and in a high speed running state. This is a reel stand drive device that performs fast forwarding and rewinding operations on two reel stands on the left and right.When winding the tape while it is running at a constant speed, An intermediate gear that selectively transmits the rotational force of the rotating body that transmits the rotational force of the drive rotor to the left and right reel stands, and is also used for fast forwarding and rewinding in high-speed running conditions, and for winding in constant-speed running conditions. is characterized in that it is constructed so that high-speed rotational force is transmitted to the left and right reel stands, respectively, by engaging with the inner surface of the outer peripheral edge of the drive rotor.

Function The present invention is capable of reeling one drive rotor and a plurality of rotating bodies located inside the drive rotor while running at a constant speed.
It is possible to provide a reel drive device for a tape recorder equipped with a reversing device that can be extremely small and thin by being used for reel winding during high-speed running.

Examples Examples of the present invention will be described with reference to the drawings. 1st
In Figures 1 to 3, reference numeral 1 denotes a first reel stand for winding the tape 18 in the forward direction. During forward rotation, the tape 18 is pressed against the capstan 11, which is integrated with the forward rotation flywheel 21, by the forward rotation pinch roller 14. Due to the rotation of the capstan 11, the head 1
A tape 18 running while contacting a tape 7 is wound up by a reel stand 1. 16 is a motor, 16a is a motor pulley, and a belt 37 drives left and right flywheels 20, 21 in the direction of the arrow through an intermediate pulley 19. The reel stand 1 is integrated with a gear 9 press-fitted into the reel stand 1 with a bearing 25 provided on a base plate 38 in between. The drive rotor 3 has a toothed portion 3b formed on the inner surface of the outer peripheral edge 3a, and a toothed portion 3c formed on the outer surface thereof, and a stopper 34 of a friction drive spring 35 is press-fitted into the central shaft portion 3d. The tooth portion 3b is always in mesh with a gear 13 that is integrally formed with the reversing flywheel 20 by press fitting or the like. Also, inside the drive rotor 3, a gear 4 is pressed against a friction member 36 via a spring 35.
The gear 4 has a toothed portion 4 at its center.
It has a. The drive rotor 3 is rotatably supported by a shaft 27 implanted in a base plate 38, and a thrust stop washer 32 for the drive rotor 3 is provided at the tip of the shaft 27. Reference numeral 23 denotes a rotating member rotatably supported by the shaft 27, which connects the operating section 23a and the arm 2.
3b is provided. A gear 5 is rotatably supported on the arm 23b by a shaft 28, and is always engaged with the teeth 4a of the gear 4 formed inside the drive rotor 3. The second reel stand 2 is integrated with a gear 10 press-fitted into the reel stand 2 with a bearing 26 provided on a base plate 38 in between. A third rotating member 25 is rotatably supported by the bearing 26, and is provided with an operating portion 25a and an arm 25b. The tooth portion 1 of the gear 10 is always attached to the arm 25b.
A gear 7 meshing with 0a is rotatably supported by a shaft 20. This gear 7 is the first rotating member 23
It is located at a position where it can mesh with the gear 5 provided on the drive rotor 3 and the gear 3b formed on the inner surface of the outer peripheral edge 3a of the drive rotor 3. The gear 8 is rotatably supported by a shaft 31 embedded in a base plate 38, and a thrust stop washer 39 for the gear 8 is provided at the tip of the shaft 31. This gear 8 is in a position where its teeth 8a are always engaged with teeth 9a of a gear 9 integrated with the reel stand 1. 24 is a second rotating member rotatably supported by the shaft 31, and includes the operating portion 24a and the arm 24.
b is provided. The arm 24b has a gear 6 rotatably supported on a shaft 29, which is always engaged with the teeth 8a of the gear 8. This gear 6 is in a position where it can mesh with the gear 5 provided on the first rotating member 23 and the gear 3b formed on the inner surface of the outer peripheral edge 3a of the drive rotor 3.

In the above configuration, the gear 6 supported by the second rotating member 24 as shown in FIG.
is in the first position of the second rotating member 24 that does not engage with the toothed portion 3b on the inner surface of the outer peripheral edge 3a of the drive rotor 3, and the gear 7 is supported by the third rotating member 25.
When the gear 5 supported by the first rotating member 23 is in the first position of the third rotating member 25 that does not engage with the teeth 3b on the inner surface of the outer peripheral edge 3a of the drive rotor 3
In the first position of the first rotating member 23 where the gear 6 meshes with the gear 6, the drive rotor 3 is rotated counterclockwise by the gear 13 integrally formed with the flywheel 20, and the rotational force is transmitted to the gear 4, 5, 6, 8,
9, the first reel stand 1 is rotated counterclockwise, and the tape 18 sent out in the direction of the arrow by the capstan 11 is wound at a low speed. Further, as shown in FIG. 4, the second and third rotating members 2
4 and 25 are respectively in the first position, the first
At the second position of the first rotating member 23, where the gear 5 supported by the rotating member 23 meshes with the gear 7, the rotational force of the drive rotor 3 is transmitted to the gears 4, 5, 7, and 10, and the gear 5 is engaged with the gear 7. The reel stand 2 of No. 2 is rotated clockwise, and the tape 18 fed out in the direction opposite to the arrow by the capstan 12 and the pinch roller 15 pressed against it is wound up at low speed.

FIGS. 5 and 6 show high-speed winding and high-speed rewinding, respectively. As shown in FIG. 5, when the gear 5 supported by the first rotation member 23 is in the third position of the first rotation member 23 where it does not engage with the gears 6 and 7, the second rotation At the second position of the second rotating member 24, where the gear 6 supported by the member 24 meshes with the gear 3b provided on the inner surface of the outer peripheral edge 3a of the drive rotor 3, the rotational force of the drive rotor 3 is applied to the gear 6, 8,9
is transmitted, causing the first reel stand 1 to rotate counterclockwise. At this time, since the gear 6 meshes with the large-diameter gear 3b of the drive rotor 3, it rotates at high speed, and the first reel stand 1 enters a high-speed winding state.
Also, at this time, the pinch rollers 14 and 15 are separated from the capstans 11 and 12, the head 17 is also separated from the tape 18, and the third rotating member 25 is separated from the first rotation member 25.
It is located at

Further, as shown in FIG. 6, the first rotating member 23
When the gear 5 supported by the gears 6 and 7 are in the third position of the first rotating member 23, the third
In the second position of the third rotating member 25, the gear 7 supported by the third rotating member 25 engages with the gear 3b provided on the inner surface of the outer peripheral edge 3a of the drive rotor 3. is transmitted to gears 7 and 10,
Rotate the second reel stand 2 clockwise. At this time, the gear 7 is the large diameter gear 3b of the drive rotor 3.
Because of the meshing, high-speed rotation occurs, and the second reel stand 2 enters a high-speed rewinding state. Also, at this time, the second rotating member 24 is in the first position, the pinch rollers 14 and 15 are separated from the capstans 11 and 12, and the head 17 is also separated from the tape 18.

In this embodiment, the first rotating member 23 takes three positions, and the second and third rotating members 24, 25 take two positions, but during high-speed winding and high-speed rewinding, , it is sufficient that the gear 5 is not engaged with the gear 6 or the gear 7, and the positions taken by each rotating member are not limited.

Effects of the Invention As described above, the present invention enables the rotation of a drive rotor having a contact portion of the rotary body on the inner surface of the outer periphery and the center portion to be rotated by a plurality of rotary bodies provided on a plurality of rotary members. By selectively moving the moving member directly or indirectly into and out of contact with the inner surface or center of the outer periphery of the drive rotor, the left and right reel stands can be used for low-speed forward winding, low-speed reverse winding, and high-speed rewinding. The rotational movement is performed according to each state of the reel table, and the rotation transmission mechanism can be centrally arranged inside one drive rotor, thereby realizing an extremely compact reel stand drive device that is compatible with reverse. I can do it. Moreover, by moving the rotating body toward and away from the inner surface of the outer peripheral edge of the drive rotor,
This allows the device to be made significantly smaller and thinner, and has a great effect on making tape recorders smaller and thinner.

[Brief explanation of drawings]

The figures show one embodiment of the reel stand driving device of the present invention, in which Fig. 1 is a plan view of the normal rotation low speed winding state,
The figure is a cross-sectional view of the gear train in normal rotation and low speed winding state.
The figure is a cross-sectional view of the gear train in the reverse low speed winding state.
5 is a plan view of the reverse winding state at low speed, FIG. 5 is a plan view of the high speed winding state, FIG. 6 is a plan view of the high speed rewinding state, and FIG. 7 is a sectional view of the inside of the drive rotor. 1, 2... Reel stand, 3... Drive rotor, 4,
5, 6, 7, 8, 9, 10, 13...gear, 1
1, 12... Capstan, 14, 15... Pinch roller, 16... Motor, 20, 21... Flywheel, 23, 24, 25... Rotating member.

Claims (1)

[Claims] 1. A drive rotor having a rotating body contact portion on the inner surface of its outer periphery; a first rotating body that concentrically transmits the rotational force of the drive rotor to the center of the drive rotor via a friction member; In order to transmit the rotational force from the first rotating body, a second rotating member is provided on the first rotating member that can be rotated concentrically with the drive rotor.
a third rotary body provided for rotationally transmitting the rotational force of the drive rotor to the first reel stand; and a third rotary body provided for transmitting the rotational force to the third rotary body. A second rotary unit that can be rotated concentrically with the rotating body.
a fourth rotating body formed on a rotating member; and a fourth rotating body concentric with the second reel stand for transmitting the rotational force of the drive rotor to a second reel stand that is paired with the first reel stand. a fifth rotating body formed on a third rotating member that can be rotationally displaced; fourth and fifth rotating bodies are provided in a space between the inner surface of the outer peripheral edge of the drive rotor and the first rotating body; At the first position of the second and third rotating members where the rotating body is located, the second rotating member supported by the first rotating member contacts the fourth rotating member. At the first position, the rotational force from the drive rotor is transmitted to the first reel stand, and at the second position, the second rotating body supported by the first rotating member comes into contact with the fifth rotating body. The rotational force from the drive rotor is transmitted to the second reel, while the second rotating body
In the third position of the first rotating member, which does not engage with the rotating body, the fourth rotating member abuts the inner surface of the outer periphery of the driving rotor.In the second position of the second rotating member, the fourth rotating member engages with the rotating body of the driving rotor. The rotational force near the outer periphery is transmitted to the first reel stand, and the fifth rotating body rotates near the outer periphery of the drive rotor at the second position of the third rotating member in contact with the inner surface of the outer periphery of the drive rotor. A reel stand driving device characterized in that it is configured to transmit force to a second reel stand.