JPH039159Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a structure for a pack guide portion for mounting a cassette pack such as a compact cassette tape or a micro cassette inside a tape player using the driving force of a motor. In particular, it relates to a pack stopper that holds a cassette in a pack guide.

[Technical background of the invention]

Autoloading devices that automatically load and eject a cassette into a tape player using the driving force of a motor have been widely proposed. One type of autoloading device is known that uses the driving force of a motor only for loading the cassette, and uses the repulsive force of a spring stored during loading for ejecting the cassette.

This autoloading device moves a power plate by the operation of a cam that is driven by a motor and rotates intermittently.
This activates the cassette loading mechanism. That is, in this type of tape player,
The intermittent gear is always locked away from the motor, regardless of whether the motor is rotating or stopped. Then, when the cassette is slightly inserted into the pack guide by hand, the pack stopper provided on the pack guide moves, and at the same time, the power on switch is pressed to start the motor rotation, and at the same time, the intermittent gear is unlocked, and the motor is connected. Connect the intermittent gear and start the rotation of the intermittent gear. As a result, the power plate is driven by this intermittent gear, and the autoloading mechanism that is linked to it is operated, and the cassette is pulled into the depths of the pack guide together with the pack stopper, and then the entire pack guide is lowered to the reel base. A cassette is placed on top. When the attachment of the cassette to the reel base is completed, the intermittent gear is also locked at its original stop position, disconnected from the motor, and stopped.

Here, the pack guide is provided with a spring that presses the pack stopper to the outside of the tape player, and a spring that acts in the direction of raising the pack guide from the reel base is provided between the tape player and the pack guide. These springs are provided with energy by the driving force of the motor during the above-mentioned loading.

On the other hand, when ejecting, the end of the tape is detected by stopping the rotation of the reel base, and by pressing the eject operation lever, the spring stored in the device is unlocked, and that force is used to reel the cassette. Lift it from above the base and then push it out from inside the pack guide to the outside of the tape player.

In this way, in conventional autoloading devices using intermittent gears, when inserting a cassette,
The following operations are essential: turning on the power switch, unlocking the intermittent gear, driving the power plate, and driving the loading mechanism.

Therefore, in the conventional apparatus, some waiting time is required from the time when the power switch is turned on with the insertion of the cassette until the start of autoloading. Therefore, it is necessary to hold the cassette by hand during the waiting time after insertion of the cassette until the start of autoloading, which poses a problem of poor operability. This is because if you release the action of manually pushing the cassette into the pack guide during the waiting time, the pack stopper may be pushed forward by the force of the eject spring, or the tape player may This is because the applied vibrations cause the cassette to be ejected to the outside of the tape player.

In order to prevent such an inadvertent eject operation, tape players have been proposed that are equipped with a pack stopper locking mechanism. That is, as shown in FIG. 1, a pack stopper 3 is slidably fitted into a guide groove 2 formed in a pack guide 1. A pressing member 6 is integrally formed on the side edge of the pack stopper 3. This pressing member 6 reciprocates within the guide groove 2 together with the pack stopper 3, and its inner end (installation side) has a vertical pressing portion as shown in the enlarged view of FIG. 6a, and, on the other hand, the front end (ejection side) of this pressing member 6 is a knife edge shaped relief portion 6b with a tapered surface facing upward.

A release arm 8 is attached to a support frame 7 projecting from the upper surface of the pack guide 1 so as to be rotatable about a support shaft 9. A spring 10 is stretched between the release arm 8 and the support frame 7, and the release arm 8
is always biased clockwise. The tip of the release arm 8 is an elongated plate-like member extending in the direction of movement of the pressing member 6, and the front end thereof has a constant angle with respect to the direction of movement of the pressing member 6. As shown in the cross-sectional view of FIG. 4, the pressed portion 8a stands vertically. On the other hand, the end of the release arm 8 opposite to the pressed part 8a, that is, the end thereof, is a knife edge-shaped relief part 8b having a downwardly tapered surface. Furthermore, an L-shaped notch is formed from the inner end to the side surface on the pack stopper side, and the front edge of this notch stands out to form a locking part 8c of the pack stopper.

In such a conventional mechanism, as shown in FIG. 2, when the cassette inserted into the pack guide 1 hits the contact part 4 at the back of the pack stopper 3,
The pack stopper 3 begins to move toward the back of the tape player along the guide groove 2 against the spring force that presses it toward the front due to the pushing force of the cassette. Then, the pressing member 6 integrally formed with the pack stopper 3 moves toward the operation side, and the pressing part 6a of the pressing member 6 hits the pressed part 8a of the release arm 8 on its trajectory. When they come into contact with each other, they engage with each other because they both have a vertically erected shape. As a result, the release arm 8 is pressed by the pressing member 6 and the spring 1 is moved around the support shaft 9.
Rotates counterclockwise against zero force.

The pack stopper 3 pushed into the back of the pack guide 1 when inserting the cassette is always biased toward the front by a spring (not shown), so the drive mechanism is activated and the pack stopper 3 starts to be retracted. If you previously let go of the cassette, it will move toward you due to the action of the spring. However, since the notch-shaped locking part 8c is formed at the corner on the inner side of the release arm 8, the pack stopper 3, which passed through the side edge while pressing the release arm 8, will not move after the release arm 8 is released. When the pressing member 6 starts to move toward the front side due to the force of the spring, the pressing member 6 comes into contact with the locking portion 8c. here,
The front side of the pressing member 6 has a knife-edge shaped relief part 6.
b, but since the locking portion 8c with which this comes into contact stands vertically, the two engage without coming apart, and the movement of the pack stopper 3 is prevented.
Therefore, until the drive mechanism operates and starts retracting the pack stopper 3, the release arm 8
This locks the pack stopper 3 and prevents the cassette from popping out.

On the other hand, when the cassette being played reaches the end of the tape, or when the eject lever of the tape player is pressed, the locking mechanism that has held the pack guide 1 in the lowered position is released, as shown in Figure 3, and the storage is released when the pack guide 1 is installed. Due to the action of the biased spring, the pack guide 1 rises from above the reel base, and the cassette inside the pack guide 1 moves toward the front side of the pack stopper 3, which is pressed by the spring provided on the pack guide. , are pushed out from inside the pack guide 1.

Here, when the pack stopper 3 moves toward the front along the guide groove 2, the pressing member 6 intersects with the release arm 8. However, the inner side of the pressing member 6 has a knife-edge shaped relief part 6b with the tapered part facing upward, and also,
The front side of the release arm 8 also has a knife edge-shaped escape part 8b with the tapered part facing downward, so the pressing member 6 enters and passes under the release arm 8, so that the two engage with each other. There is no. Therefore, despite the movement of the pressing member 6,
The release arm 8 does not rotate about the support shaft 9, and the ejection is completed.

[Problems with background technology]

However, with such a locking mechanism of the pack stopper, if the cassette is inserted deep beyond the pressed part 8b of the release arm 8 during installation, and the hand is released before autoloading starts, the cassette may become inconveniently stuck. There is a problem when it is extruded in the ejection direction.

That is, when pushing the cassette, the front end 6 of the pressing member 6 provided on the pack stopper 3
b releases the hand at a relatively shallow position that does not exceed the pressed portion 8b of the release arm 8, the engagement portion 8c of the release arm 8 and the end portion 6 of the pressing member 6
b engages and the cassette stops within the pack guide, but if you release your hand at the position where the pressing member 6 passes the pressed part 8b, the pressing members are knife-edge-shaped with respect to each other as in the case of ejection. Since the end portion 6b and the pressed portion 8b intersect and the pack stopper passes under the release arm, the cassette is pushed out of the pack guide. Therefore, in order to prevent this, care must be taken to always push the cassette to a certain position, but in actual operation it is very difficult to stop the cassette mid-way. However, when ejecting, it is impossible to attach a locking member to the pack guide to forcibly stop the cassette in the middle of pushing it in. Conventional mechanisms cannot ensure reliable autoloading operation. There were some unexpected flaws.

[Purpose of invention]

The present invention was proposed in order to overcome the shortcomings of the prior art, and its purpose is to load the cassette within the waiting time after manual insertion of the cassette until the autoloading operation starts. To provide a pack stopper locking mechanism that can keep the cassette in the pack guide regardless of the insertion position even if the pushing operation is canceled, and prevents an inadvertent ejecting operation. It's about doing.

[Summary of the idea]

The locking mechanism of the pack stopper of the present invention includes, in addition to the conventional release arm, an arm lock plate that locks the release arm rotated in its rotational position when the cassette is installed. The release arm is locked in the locking position with the pack stopper to prevent the cassette from flying out, autoloading is started, and when the pack guide descends, the release arm on the frame side engages with the arm lock plate on the pack guide side. When the cassette is released, the release arm returns to a position where it does not lock the pack stopper during ejection, making it possible to eject the cassette.

[Example of idea]

Hereinafter, one embodiment of the present invention will be specifically described based on the drawings.

(1) Configuration In this embodiment, a release arm 18 is attached to the support frame 7 extending from the top side of the pack guide 1 so as to be rotatable about a support shaft 19. A spring 10 is stretched between the release arm 18 and the support frame 7.
Release arm 18 is always biased clockwise. The release arm 18 has a plate-like member that extends toward the back substantially along the moving direction of the pressing member 6 and has a hook-shaped tip. this house,
The front part of the side edge on the pack stopper side has a certain angle with respect to the moving direction of the pressing member 6, and is a vertically standing pressed part 18a, and the innermost widthwise end part has a downward taper. The relief portion 18b is shaped like a knife edge with a surface. Furthermore, on the side surface on the pack stopper side, there is a pressed portion 18a.
An L-shaped notch is formed between the and relief portion 18b, and the front edge of this notch stands out to form a locking portion 18c of the pack stopper. on the other hand,
A protruding locking portion 21 is integrally provided on the lower surface of the hook-shaped tip, and the end portion on the support frame 7 side has a tapered shape cut diagonally. This release arm 18 is
It is connected to a release plate 23 at a pin-shaped protrusion 22 provided integrally therewith. This release plate 23 is supported so as to be movable in the front and back direction with respect to the frame of the tape player, and an intermittent gear 24 is provided on the opposite side (front end) of the connection part with the release arm 18. Projecting piece 26 for pressing the stopper 25 in the release direction
is provided.

The intermittent gear 24 is provided with a recess 27 on its periphery, into which the stopper 25 is engaged, and the tip of the stopper 25 is engaged with this recess 27. Further, the stopper 25 is rotatably attached to the support shaft 28, and an abutment portion 29 for the protrusion 26 of the release plate 23 is provided on the opposite side of the portion that engages with the recess 27 of the intermittent gear 24. It is being Further, the stopper 25 is provided with a pressing piece 25a that presses the power switch SW when the stopper 25 is removed from the recess 27.

On the other hand, on the upper surface of the pack guide 1, an arm lock plate 35 is attached to a shaft 36 at the back of the release arm.
It is rotatably mounted around the pack guide 1, and is biased clockwise by a spring 37 attached between it and the pack guide 1. A lock portion 38 bent toward the front side in the shape of a hook is provided at the end of the arm lock plate 35 on the pack stopper side, and is configured to be able to engage with the locked portion 21 of the release arm 18. Further, a tapered pressed portion 39 that is pressed by the locked portion 21 is formed on the outer edge of the lock portion 38 . Further, a protruding regulating portion 40 is provided on the inner side of the arm lock plate 35, and comes into contact with a stopper 41 attached to the pack guide 1 to regulate clockwise rotation of the arm lock plate 35. ing.

(2) Function The locking mechanism of the pack stopper of this embodiment having the above-mentioned structure functions as follows.

During operation...Figures 6 and 7 When the cassette inserted into the pack guide 1 hits the abutment part 4 at the back of the pack stopper 3, the pack stopper 3 is pressed by the spring force that presses it toward the front side due to the pushing force of the cassette. Against this, the tape player starts moving along the guide groove 2 toward the back of the tape player. Then, the pressing member 6 integrally formed with the pack stopper 3 moves toward the operation side, and the pressing part 6a of the pressing member 6 hits the pressed part 18a of the release arm 18 on its trajectory. When they come into contact with each other, they engage with each other because they both have a vertically erected shape. As a result, the release arm 18 is pressed by the pressing member 6 and rotates counterclockwise about the support shaft 19 against the force of the spring 10.

Therefore, the release plate 23 that is engaged with the release arm 18 at the protrusion 22 moves toward the front side of the tape player, and the protrusion piece 26 at the front end presses the contact portion 29 of the stopper 25. do. Then, this stopper 25 rotates counterclockwise around the support shaft 28, and the tip of the stopper 25 is thereby disengaged from the recess 27, and the intermittent gear 2
4 can now rotate freely. At the same time, the power switch SW is pressed by the switch pressing piece 25a formed on the stopper 25, and the power is turned on to the motor.

As a result, the driving force on the motor side is transmitted to this intermittent gear, the power plate driven by the intermittent gear is driven, and the pack stopper 3 moves the cassette to the back of the pack guide by the drive mechanism interlocking with this power plate. After retraction, the pack guide 1 is lowered onto the reel base, and loading of the cassette is completed.

Pack stopper locking operation...Figure 8 The pack stopper 3 pushed into the back of the pack guide 1 when inserting the cassette is always urged toward the front by a spring (not shown), so the drive mechanism is activated. And pack top par 3
If you let go of the cassette before it begins to retract, it will begin to move toward you due to the action of the spring. However, in this embodiment, the movement of the pack stopper 3 is stopped by the following functions of the release arm 18 and the arm lock plate 35.

That is, when the release arm 18 is rotated counterclockwise by the pressing member 6 of the pack stopper 3,
The locked portion 21 provided there presses the pressed portion 39 of the arm lock plate 35, and the arm lock plate 35 rotates counterclockwise against the biasing force of the spring 37. Eventually, the locked part 2
1 passes over the tip of the lock portion 38 of the arm lock plate 35, the lock portion 38 of the arm lock plate 35 and the locked portion 21 of the release arm 18 engage, and the release arm 18 is locked at its rotational position. . In this situation, when you release your hand from the cassette that has been pushed into the innermost part of the pack guide, the pack stopper 3 will move toward you, and the relief part 6b of the pressing member 6 will move toward the tip of the release arm. It passes through the escape part 18b. However, the release arm 18 is locked in the rotational position, and the side edge deeper than the locking part 18c is away from the line of movement of the pressing member 6. 18 escape part 1
8b, the pressing member 6 moves further forward and comes into contact with the locking portion 18c of the release arm 18. Here, the front side of the pressing member 6 has a knife-edge shaped relief part 6b, but the locking part 18c that this comes into contact with stands vertically, so the two are engaged without coming apart and the pack stopper 3 is moved. is prevented. Therefore, until the drive mechanism operates and starts retracting the pack stopper 3,
Pack stopper 3 by release arm 18
is locked and the cassette is prevented from popping out.

Eventually, when the cassette is installed and the pack guide 1 descends, the arm lock plate 3
5 also descends, thereby disengaging the locking portion 38 from the locked portion 21 of the release arm.
The release arm 18 rotates clockwise according to the biasing force of the spring and returns to its original position. On the other hand, the arm lock plate 35 also rotates further clockwise due to the biasing force of the spring 37, but because the regulating portion 40 comes into contact with the stopper 41, it remains at the initial position.

When ejecting...Figure 9 If the cassette being played reaches the end of the tape,
Alternatively, when the eject lever of the tape player is pressed, the locking mechanism that has been holding the pack guide 1 in the lowered position is released, and the pack guide 1 rises from above the reel base due to the action of the spring stored when it is installed. At the same time, the arm lock plate 35 also rises. At this point, the release arm has already rotated clockwise and returned to its original position, so the locking portion of the arm lock plate and the locked portion of the release arm do not engage. Further, the cassette in the pack guide 1 is moved forward as the pack stopper 3 is pressed by the spring provided in the pack guide.
Extruded from within.

Here, when the pack stopper 3 moves toward the front along the guide groove 2, the pressing member 6 intersects with the release arm 18, which has returned to its original position. However, the inner side of the pressing member 6 has a knife-edge shaped relief portion 6 with the tapered portion facing upward.
b, and since the inner horizontal end of the release arm 18 also has a knife edge-shaped relief part 18b with the tapered part facing downward, the pressing member 6
enters and passes under the release arm 18, so the two do not engage with each other. Therefore, despite the movement of the pressing member 6, the release arm 18 does not rotate about the support shaft 19.

[Other Examples]

Note that the present invention is not limited to the illustrated embodiment, and the direction of the tapered part of the knife-edge relief part is set so that the pressing member 6 side faces downward, contrary to the illustration, so that the pressing member 6 is connected to the release arm 18. It is also possible to make it pass above.

Alternatively, a hook-shaped lock portion may be provided at the inner end of the release arm in a direction opposite to that shown, and a locked portion may be provided that protrudes from the upper surface of the arm lock plate, so that the two may be engaged.

[Effect of idea]

As described above, the present invention has a simple configuration in which an arm lock plate is provided that locks the release arm in its rotational position only when a cassette is installed, and the cassette can be pushed to the innermost part of the tape player and automatically loaded. Even if the push is released before the start of dewing, the forward movement of the pack stopper can be prevented. As a result, it is possible to eliminate the waiting time from the insertion of the cassette to the start of autoloading, and to provide a tape player that can perform reliable autoloading operations regardless of the position in which the cassette is pushed in. effective.

[Brief explanation of the drawing]

1 to 3 are plan views showing the locking mechanism of a conventional pack stopper, and FIGS. 6 to 9 are plan views showing an embodiment of the pack stopper of the present invention. FIG. 7 shows the state when the cassette is inserted, FIGS. 2 and 8 show the state when waiting for loading, and FIGS. 3 and 9 show the state when the cassette is ejected. 4 and 5 are cross-sectional views of a pressing member and a release arm in a conventional locking mechanism, with FIG. 4 showing the cassette when it is inserted, and FIG. 5 when the cassette is being ejected. 1... Pack guide, 2... Guide groove, 3...
Pack stopper, 4...Abutting part, 5...Claw part,
6... Pressing part, 7... Support frame, 8... Release arm, 9... Support shaft, 10... Spring,
18...Release arm, 18a...Pressed part,
18b... Relief part, 18c... Locking part, 21...
Locked part, 22...Protrusion, 23...Release plate, 24...Intermittent gear, 25...Stopper, 3
5...Arm lock plate, 36...Shaft, 37
...Spring, 38...Lock part, 39...Pressed part, 40...Restriction part, 41...Stopper.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A pack stopper 3 is provided on the pack guide 1 which is movable up and down with respect to the frame 7 so as to be slidable between the insertion side and the ejection side of the cassette along the insertion direction of the cassette. A release arm 18 for starting autoloading is movably provided on the side of the movement line 3, and a pack stopper 3 that moves toward the back of the tape player is provided at the front end of the release arm 18. Pressed portion 1 that engages and moves release arm 18
8a, and on the back side thereof is a locking portion 1 that engages with the pack stopper 3 that is biased toward the front side of the tape player when the release arm 18 moves.
8c, and a relief part 18b that cannot be engaged with the pack stopper 3 when ejecting the cassette is formed at the inner end of the release arm 18. On the other hand, an arm is provided on the pack guide 1 close to the release arm 18. A lock plate 35 is attached, and the arm lock plate 35 is provided with a locking means that engages with the release arm 18 rotated when the cassette is attached and is released from the engagement when the pack guide 1 is lowered. A locking mechanism for the pack stopper. (2) The locking means for locking the release arm 18 at the rotational position is composed of a protrusion 21 formed on the lower surface of the release arm 18 and a hook-shaped lock 38 formed on the arm lock plate. A locking mechanism for a pack stopper as set forth in claim (1) of the utility model registration. (3) The locking mechanism for the pack stopper according to claim 1, wherein the relief portion 18b of the release arm 18 is located outside the line of movement of the pack stopper 3 when the release arm 18 rotates. (4) The pack stopper 3 has a knife edge-shaped relief part 6b at its front end and a pressing part at its rear end. Stop mechanism.