JPH0210599Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape running direction switching device for a cassette type tape player.

In an auto-reverse type cassette tape player, the tape feeding direction is automatically reversed at the end of the tape, etc., but in conventional mechanisms of this type, idler levers or gears are placed in the forward and reverse drive systems. was relatively complex. This invention winds up by swinging to the left or right.
A gear and its supporting arm are provided to mesh with one of the two rewind reels, and by simply rotating the reel drive motor in the forward and reverse directions, the gear is engaged with one of the reels and the tape feeding direction can be switched. At the same time, the movement of the support arm (drive wheel holder) is used to switch between the left and right pinch rollers. Next, this will be explained with reference to examples.

FIG. 1 shows the main parts of a tape player to which the present invention is applied. Reference numeral 1 denotes a reel motor, which rotates a pulley 3a via a rubber belt 2. A gear 3c is attached to this pulley 3a with a common shaft 3b, and a gear 4 meshes with the gear 3c. Axis 4 of gear 4
A gear 5 is integrally attached to a, and this gear 5 meshes with a gear 6. 7 is a drive wheel holder which pivotally supports the gear shafts 4a and 6a, and which supports the gear shafts 4a and 6a.
oscillates around. That is, the shaft 4a also serves as the rotation axis of the holder 7. Reference numerals 10A and 10B are reel stands, and central holes of a pair of reels of the cassette fit into the shafts 10a and 10b. The surroundings of the reel stands 10A and 10B are gears, and in the figure, the reel stand 10A
The peripheral gear portion of and the gear 6 mesh with each other. In this state, the left side in the drawing (although omitted in the drawing below, the left and right sides,
Reel stand 10 (top and bottom, front and back are all in the drawing)
A is the winding side, and the right reel stand 10B is the rewinding side.

To explain the operation of the mechanism up to this point, the reel motor 1 rotates in the direction of arrow _F1 , the gear 3c,
4 rotates in the directions of arrows F ₂ and F ₃ , the holder 7 rotates in the direction of arrow F ₄ around the shaft 4a due to the reaction force of this rotation, and the gear 6 and the peripheral gear portion of the reel stand 10A mesh with each other, and the reel The stand 10A rotates and becomes the tape winding side. The reel stand 10B serves as a rewind side where the tape is simply pulled out in a free state. When the rotational direction of the reel motor 1 is reversed, the rotational direction of gears and the like is reversed, and the holder 7 rotates about the shaft 4a in the direction opposite to the arrow _F4 . As a result, the second
As shown in the figure, the gear 6 and the peripheral gear part of the reel stand 10B mesh with each other, and the reel stand 10B is driven and becomes the winding side, and the reel stand 10A is free and becomes the unwinding side where the tape is simply pulled out. . Thus, in the present invention, simply by rotating the reel motor in the forward or reverse direction, the holder 7 swings and presses the drive gear against the left or right reel stand, thereby changing the tape drive direction.

Next, reference numeral 8 denotes a lever, which has elongated holes 8a, 8b, and 8c at both ends and the center. Studs 9a and 9b fit into 8a and 8b to slidably support the lever 8, and 8c has long holes 8a, 8b, and 8c. A pin 7a implanted in the gear holder 7 is fitted to move the lever to the left or right.
In FIG. 1, gear holder 7 is rotating counterclockwise, so lever 8 is driven to the left. The central part of the lever 8 is mountain-shaped, and 8d is the top. 11a and 11b are pinch rollers, 1
2a, 12b are capstan shafts, 13a, 13b
is a flywheel integrated with the capstan shafts 12a and 12b, and is rotated by a capstan motor 15 via a rubber belt 14. Reference numeral 16 is a head stand that can be moved vertically by being guided by pins 16a, 16b, etc., and is constantly driven upward by a spring (not shown). This T-shaped head point 16
One end of the arms 17a, 17b is attached to a shaft 18 at both ends of the arm 17a, 17b.
a and 18b, and the aforementioned pinch rollers 11a and 11b are pivotally connected to the other end. This arm 17
a and 17b are constantly driven in the directions of arrows F ₅ and F ₆ by springs 19 (the spring on the 17b side is not shown);
and protrusions 21a and 21b that can be engaged with the lever 20.
Equipped with The lever 20 is pivotally connected to the head stand 16 by a shaft 20a, and the left and right arms are connected to the projection 21.
a, 21b, and a protrusion 20b at the tip of the central body.
engages with the peak portion 8d of the lever 8. Reference numeral 22 denotes a lever driven by an electromagnet 23, which engages with a pin 16c of the head stand 16 to move the head stand downward.

As shown in FIG. 1, when the holder 7 rotates counterclockwise, its pin 7a moves the lever 8 to the left, and in this state, the electromagnet 23 is energized and the lever 8
2 and rotate the lever clockwise around the shaft 22a, the tip of the lever touches the pin 16c.
Press to pull the head stand 16 downward. This causes the head (not shown) to protrude toward the cassette and assume the playing state. At this time, the lever 20 on the head stand 16 also moves downward, and the pin 20b at the tip thereof is guided by the peak 8d of the lever 8 and moves to the right, and as a result, the lever 20 moves around the shaft 20a as shown in the figure. Rotate counterclockwise. With this rotation, the left arm of the lever 20 comes off the protrusion 21a and the arm 17a
is rotated in the direction of arrow _F5 by the spring 18a, and the pinch roller 11a is brought into contact with the capstan 12a. Although not shown, the tape of the cassette passes over the top of the capstan 12a, and therefore, the tape is passed through the capstan 12a by the pinch roller 11a.
is pressed by the capstan, and is driven by the capstan and runs from the capstan 12b side to the capstan 12a side,
It is wound onto a reel on the reel stand 10A. The right arm of the lever 20 hits the protrusion 21b and pushes it up, causing the arm 17b to rotate clockwise about the shaft 18b, separating the pinch roller 11b from the capstan 12b.

The reel motor 1 reverses and the holder 7 falls to the right as shown in FIG. 2, and the gear 6 and reel stand 10
When the peripheral gears B are engaged, the lever 8 moves to the right, so when the electromagnet 23 is energized and the head stand 16 is lowered via the lever 22, the pin at the tip of the lever 20 reaches its peak. It is guided to the left by the portion 8d and rotates clockwise about the shaft 20a as shown in FIG. As a result, lever 20
The left arm of the lever 20 pushes up the protrusion 21a and rotates the arm 17a counterclockwise, pulling the pinch roller 11a away from the capstan 12a, the right arm of the lever 20 separates from the protrusion 21b, and the arm 17b is rotated by the spring around the shaft 18b. Rotate clockwise to press the pinch roller 11b against the capstan 12b. The tape of the cassette is sandwiched between the capstan 12b and the pinch roller 11b, and the tape of the cassette is
2b in the opposite direction, that is, from 12a to 12b, and is wound by a reel on reel stand 10B.

Note that 24a and 24b are Hall integrated circuits, which output pulses according to the number of rotations of the reel stand using a permanent magnet attached to the back of the reel stand.

As explained above, in this invention, the reel motor 1
A simple mechanism in which the holder 7 is swung to the left or right by forward and reverse rotation, and the drive gear is engaged with the left or right peripheral gear of the reel stand, allows the cassette tape to run to the left or right, and the idler gear etc. Since this is not necessary, the mechanism becomes simple. Furthermore, gear 3
The wheels c, 4, 5, 6, etc. may be wheels that are pressed against each other to transmit rotational force.

Moreover, in order to transmit the movement of the drive wheel holder 7 to the slide lever 8 and rotate the pinch roller switching lever 20 at the position of the top 8d, the pinch roller
Switching between 1a and 11b can also be performed at the same time. Furthermore, since the pinch roller switching lever 20 is released when moving the slide lever 8,
There is an advantage that an excessive load such as a spring force for biasing the head stand is not applied to the motor 1.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a main part showing an embodiment of the present invention, and FIGS. 2 and 3 are explanatory views of a part of the same. In the drawing, 10A and 10B are reel stands, 10a and 1
0b is its axis, 1 is the reel motor, 6 is the drive wheel,
7 is a drive wheel holder.

Claims (1)

[Scope of utility model registration request] A pair of reel stands 10A, 10B having shafts that fit into the center holes of the left and right pair of reels of the cassette.
and the pair of reel stands, and when the drive wheel 6 is rotated clockwise or counterclockwise by the reel motor 1, it swings to the left or right to move the drive wheel 6 to the reel stand 10A. , 10B to drive one side of the reel stand and leave the other free, and a slide that is pressed by the holder 7 and moved to the left or right by the swinging action of the holder 7. lever 8 and the slide lever 8
a head stand 16 biased in a direction away from;
A head stand drive lever 22 and an electromagnet 23 that urge the head stand 16 in a direction toward the slide lever 8, a pinch roller switching lever 20 pivotally supported by the head stand 16, and the slide lever 8.
a top portion provided on the top portion of the pinch roller switching lever 20 that contacts the pinch roller switching lever 20 and rotates the pinch roller switching lever 20 when the head stand 16 is moved in a direction approaching the slide lever 8 by the head stand drive lever 22 and the electromagnet 23; 8d, and arms 17a and 17b that press one of the left and right pinch rollers 11a and 11b against one of the left and right capstan shafts 12a and 12b in accordance with the rotating direction of the pinch roller switching lever 20, and the arms 17a and 17b press one of the left and right pinch rollers 11a and 11b to one of the left and right capstan shafts 12a and 12b in accordance with the rotating direction of the pinch roller switching lever 20, and When switching, the rotation direction of the reel motor 1 is changed to swing the holder 7, the slide lever is moved by the movement of the holder 7, and after the swinging of the holder 7 is completed, the electromagnet 23 is operated. The head stand 16 is moved, and as the head stand 16 is moved, the pinch roller switching lever 20 is brought into contact with the top portion 8d, and one of the left and right pinch rollers 11a, 11b is attached to one of the left and right capstan shafts 12a, 12b. A tape running direction switching device characterized by pressure contact.