JPH0453025B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an auto-eject mechanism for automatically performing an eject operation in a tape player.

[Technical background of the invention and its problems] In the conventional auto-eject mechanism, when ejecting, the action is triggered by plunger suction, etc., and this is transmitted to the gear via the link, which is the first time the eject mechanism has been used. It is adapted to be connected to drive means. The gear is rotated by the driving force of the driving means, thereby driving the driven member to perform an ejecting operation.

However, if a plunger, rank, or the like is used as a starter for triggering the operation in this way, the mechanism becomes complicated, which goes against the demands for smaller and simpler tape players. Furthermore, the complexity of the mechanism also leads to a decrease in reliability, which has also been a problem.

[Object of the Invention] The present invention has been proposed in order to solve the above-mentioned drawbacks of the prior art. , the mechanism is simplified and the number of parts is reduced, and therefore,
An object of the present invention is to provide an auto-eject mechanism with improved reliability of eject operation.

[Summary of the Invention] The auto-eject mechanism of the present invention includes: a) a forward and reverse gear capable of forward and reverse rotation by a rotationally driven forward and reverse switching means; b, a gear plate is pivotally supported on the shaft of the forward and reverse gear; A friction means is provided between the gear plate and the shaft of the forward/reverse gear to bias the gear plate in the direction of rotation of the forward/reverse gear; are each pivoted, and these two switching gears are rotated in opposite directions.
meshing with the forward and reverse gears, respectively, d meshing with either one of these two switching gears to perform forward and reverse rotation, and providing an intermittent operation for driving the driven member during forward rotation to perform an eject operation; is provided with a biasing means for biasing the intermittent gear in the forward rotation direction at a position where the forward rotation side switching gear faces the intermittent portion, f. Provided with a lock portion and a locking means for locking the forward rotation of the intermittent gear against the biasing means at a position where the gears face each other, and for releasing the lock when the intermittent gear reverses, g The forward/reverse rotating gear is engaged with the switching gear on the reverse side by an eject command to reverse the gear, and the switching gear on the reverse side reaches the intermittent part of the reversed intermittent gear before rotating in the normal direction. It is something to do.

And, by having the above configuration,
During normal forward rotation of the forward/reverse gear, the gear plate rotates toward the forward rotation side, and with one switching gear in the intermittent section, the locking section of the intermittent gear is locked by the locking means, causing the intermittent rotation to occur. Gear is at a standstill. When the rotational drive is reversed in this state, the gear plate first rotates in the reverse direction, the switching gear on the opposite side to that during forward rotation meshes with the intermittent gear, the intermittent gear once rotates in the reverse direction, and the release means The lock is released, which triggers the eject operation. That is, if the rotational drive is returned to normal rotation again in this state, the free-state intermittent rotates and the eject operation is started.

[Embodiment of the Invention] An embodiment of the auto-eject mechanism according to the present invention as described above will be specifically described with reference to the drawings.

FIG. 1 is a diagram showing normal rotation. At the same time, the forward/reverse gear 1 is driven by the forward/reverse motor 9. This forward/reverse gear 1
A gear plate 2 is supported on the shaft 1a, and switching gears 3a and 3b are supported on both sides of the gear plate 2, and mesh with forward and reverse gears. Furthermore, a compression spring 4 is provided between one switching gear 3b and the gear plate 2 as shown in FIG. ing.

The intermittent gear 5 has one intermittent portion 5a that matches the dimensions of the switching gears 3a and 3b, a lock pin 5b that is a locking portion, and a notched rotary plate 5c, and has one intermittent portion 5a that matches the dimensions of the switching gears 3a and 3b. It meshes with one of the shafts and rotates forward and backward, and when it rotates forward, it drives the driven member to perform an eject operation. Also,
As a locking means for the intermittent gear 5, a lock link 6 is provided which is rotatable around a shaft 6a, and a substantially V-shaped groove 7 is provided on one side of the lock link 6, and a lock pin 5b moves within this groove 7. It's getting old. A torsion spring 8 is provided between the notched rotary plate 5c of the intermittent gear 5 and the lock ring 6 to bias both. During forward rotation in FIG. 1, the intermittent gear 5 is about to rotate in the forward direction (counterclockwise in the figure) due to this biasing force, but the lock link 6 is biased in the opposite direction. Therefore, the lock pin 5b is locked at the corner of the groove 7 of the lock link 6. In addition, 10 in the figure is an idler gear designed to mesh with the flywheel 11 only when the head plate is retracted.

Next, the operation of this embodiment will be explained. First, in the play mode where the head plate is in the forward position, fast forward rewinding, etc., the idler gear 10 is separated from the flywheel 11, and the forward/reverse gear 1
However, in the stop mode when the head plate is in the backward position, the idler gear 10 meshes with the flywheel 11, and the forward/reverse gear 1 rotates forward (counterclockwise in the figure). As shown in FIG. 1, the gear plate 2 is rotated by the compression spring 4 in the forward direction (counterclockwise in the figure). At this time, the intermittent gear 5
Since the torsion spring 8 presses the corner part of the notch, the flat part of the notched rotary plate 5c and the torsion spring 8 receive a force in a direction such that they overlap.
It is biased in the forward rotation direction. However, intermittent gear 5
As mentioned above, the switching gear 3a is locked to the locking link 6, and is moving toward the meshing side with the intermittent gear 5 according to the position of the gear plate 2.
is opposed to the intermittent portion 5a of the intermittent gear 5.

When an eject command is issued in this state, the motor 9 rotates in the reverse direction, the forward/reverse gear 1 reverses (clockwise in the figure), and the gear plate 2 moves in the reverse direction (clockwise in the figure), as shown in Figure 2. When rotated, the switching gear 3b on the opposite side to the forward rotation meshes with the intermittent gear 5. As a result, the intermittent gear 5 rotates in the reverse direction, and the lock pin 5b moves in the groove 7 of the lock link 6. At this time,
Since the lock link 6 is biased counterclockwise in the figure by the torsion spring 8, the lock pin 5b comes to the relief part of the groove 7, and the lock ring 6 is pushed inward. discharge from. However, since the intermittent gear 5 immediately stops the intermittent portion 5a facing the switching gear 3b, the rotation of the motor is stopped at this point.

In this state, the motor returns to normal rotation again, resulting in the state shown in FIG. 3. In FIG. 3, the lock link 6 is moved inward, and when the gear plate 2 rotates in the forward direction, the switching gear 3a meshes with the intermittent gear 5, so the switching gear 3a rotates. Accordingly, the intermittent gear 5 rotates forward (counterclockwise in the figure), drives the driven member, and enters the eject state. In this case, when the switching gear 3a drives the intermittent gear 5 in normal rotation, the intermittent portion 5a is immediately reached, and rotational force transmission from the switching gear 3a to the intermittent gear 5 is cut off. However, since the torsion spring 8 presses the notched rotating plate 5c, a biasing force is applied to the intermittent gear 5 in the forward rotation direction, and at the same time, the aforementioned stop body is unable to lock the intermittent gear 5. Since the link 6 and the lock pin 5b are disengaged, the intermittent gear 5 rotates in the normal rotation direction even if it is separated from the switching gear 3a. Then, when the intermittent gear 5 rotates further forward due to the force of the torsion spring 8,
Since the intermittent portion 5a passes over the switching gear 3a, the intermittent gear 5 and the switching gear 3a mesh again, and thereafter the intermittent gear 5 is rotated by the force of the switching gear 3a. As a result, the eject mechanism interlocked with the intermittent gear 5 is activated to eject the cassette. After the intermittent gear 5 rotates once, the lock pin 5b enters the groove 7 of the lock link 6 and is locked at the corner, and the intermittent part 5a faces the switching gear 3a, so that it is not in the state shown in FIG. It fades and stops.

In this way, in this embodiment, the trigger for switching to the eject operation can be performed using only a lock link or other simple structure by utilizing the reversal of the motor, so when using a plunger and a link as in the conventional case, In comparison, the configuration is significantly simplified and the number of parts can be reduced. Also, to simplify the configuration,
This also leads to improved reliability of the eject operation.

Note that the present invention is not limited to the above-mentioned embodiments, and for example, the structure around the locking means centering on the locking link does not have to be a locking pin and a groove. For example, the locking pin may be engaged with an engaging protrusion. There are ways to stop this. Furthermore, instead of providing a compression spring for the friction means for rotating the gear plate in the rotational direction of the forward/reverse gear, means for inserting synthetic resin or the like may be considered.

[Effects of the Invention] As explained above, according to the present invention, by utilizing the reversal of the rotational drive, the number of parts is reduced due to the simple structure, contributing to miniaturization, simplification, and improved reliability of the tape player. It is possible to provide an auto-eject mechanism that can

[Brief explanation of the drawing]

1 to 3 are plan views showing one embodiment of the auto-eject mechanism according to the present invention, respectively.
The figure shows a normal mode state, FIG. 2 shows an intermittent gear reversal state due to an eject command, FIG. 3 shows an eject operation start state, and FIG. 4 is a sectional view showing the arrangement relationship of each gear and gear plate. 1... Forward/reverse gear, 2... Gear plate, 3
a, 3b...Switching gear, 4...Compression spring,
5... Intermittent gear, 5a... Intermittent portion, 5b... Lock pin, 5c... Notched rotating plate, 6... Lock link, 7... Groove, 8... Torsion spring, 9
...Motor, 10...Idler gear, 11...Flywheel.

Claims (1)

[Scope of Claims] 1. An auto-eject mechanism for automatically ejecting a cassette, comprising: a) a forward and reverse gear capable of forward and reverse rotation by means of a rotary-driven forward and reverse switching means, and b. A gear plate is pivotally supported on the shaft of the gear, and friction means is provided between the gear plate and the shaft of the forward/reverse gear to bias the gear plate in the rotational direction of the forward/reverse gear, c. On both sides of the gear plate. The two switching gears on the forward rotation side and the reverse rotation side are respectively supported by shafts, and these two switching gears are arranged so that both gears rotate in opposite directions.
d) an intermittent gear that meshes with one of the two switching gears to perform forward and reverse rotation, and drives a driven member during forward rotation to perform an eject operation; e) the intermittent gear is provided with a biasing means for biasing the intermittent gear in the forward rotation direction at a position where the forward rotation side switching gear faces the intermittent portion, f. A lock portion and a locking means are provided for locking the forward rotation of the intermittent gear against the biasing means at a position where the switching gear faces, and for releasing the lock when the intermittent gear is reversed; g. The forward and reverse rotation gear is engaged with the reverse rotation side switching gear in response to an eject command and rotated in the reverse direction, and when the reverse rotation side switching gear reaches the intermittent part of the reversed intermittent gear, the forward rotation gear is rotated in the normal direction. Auto-eject mechanism. 2. The biasing means biases the notched rotary plate integrally provided with the intermittent gear in the forward rotation direction of the intermittent gear at a position where one switching gear faces the intermittent portion of the intermittent gear. 2. The auto-eject mechanism according to claim 1, comprising a spring that provides an auto-eject mechanism. 3 The lock part of the intermittent gear is a lock pin,
The lock means for locking the lock pin is a rotatable lock link, and the lock link has a V-shaped groove for moving the lock pin and engaging it in the normal rotation direction. The auto-eject mechanism according to item 1. 4. The auto-eject mechanism according to claim 1, wherein the friction means for biasing the gear plate in the rotation direction of the forward and reverse gears is a compression spring provided between one of the switching gears and the gear plate. .