JPH0343703B2 - - Google Patents

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to an operating mechanism used in an autoloading device for a tape player, and which operates in a predetermined manner only when receiving a pressing force from a certain direction. The present invention relates to a one-way operation mechanism designed to perform the following operations.

[Technical Background of the Invention] Autoloading devices that automatically load a cassette into a tape player or eject a cassette using the driving force of a motor have been widely proposed. There are various types of autoloading devices, some of which use the driving force of a motor only for loading the cassette, and others that use the repulsive force of a spring stored during loading for ejection, and others that use the driving force of the motor for both loading and ejecting. There are some known methods that do this.

Now, among these autoloading devices,
One type of device that uses a motor to both install and eject a cassette is one in which a power plate is moved by the operation of an intermittent rotating cam, and the power plate is used to install and eject the cassette.

That is, in this type of tape player, the intermittent gear is always stopped regardless of whether the motor has stopped rotating, and when the cassette is slightly inserted into the pack guide by hand, the power on switch in the pack guide is activated and the motor is turned on. The reel base starts to rotate, but since the cassette is not loaded at this point, the reel base does not rotate. Therefore, the tape player determines that the tape is at the end, and in order to unlock the intermittent gear, the motor and the intermittent gear are connected, and the intermittent gear starts rotating. As a result, the power plate is driven by the intermittent gear, the cassette is pulled into the pack guide, and autoloading is started. When the cassette is completely attached to the reel base, the intermittent gear is also locked at the initial stop position, and at the same time, the connection with the motor cam is cut off and the intermittent gear stops.

On the other hand, when ejecting, the tape end is detected by stopping the rotation of the reel base, and by pressing the eject operation lever, the intermittent gear is unlocked, the power plate is moved, and the cassette is moved from the mounting position to the outside of the tape player. Take it out.

[Problems with the Background Art] As described above, in the conventional autoloading device using an intermittent gear, detection of the tape end serves as a trigger for unlocking the intermittent gear and driving the power plate. Therefore, when inserting a cassette, the following operations are essential: turning on the power switch, stopping the reel base to detect the tape end, unlocking the intermittent gear, and driving the power plate.

However, in order to detect the tape end by stopping the rotation of the reel base, it is possible to detect the end of the tape by electrically detecting the stop of the reel base using a proximity switch or photocoupler, or to detect the end of the tape by detecting the stop of rotation of the reel base by changing the tension of the tape or by the friction of the reel base. Various mechanical methods are known that utilize angle changes, but all of them determine that the tape has reached the end after confirming that the reel base has stopped rotating for a certain period of time. Although this judgment time is very short, it cannot be omitted, and if this judgment time is added, the waiting time from the insertion of the cassette until the start of autoloading reaches about 1 second.

For this reason, in the conventional device, it is necessary to hold the cassette by hand for some time after inserting the cassette into the pack guide until autoloading starts, which has the problem of poor operability.

In order to improve this point, it is conceivable to directly release the lock of the intermittent gear by inserting the cassette. However, since the operating mechanism that transmits the cassette insertion operation to the intermittent gear is linked to the cassette movement,
Even when ejecting, it operates as the cassette moves. As a result, when the intermittent gear is unlocked at the tape end and the cassette is ejected, it is pulled out to the insertion start position and reaches the operating mechanism, and this operating mechanism is activated and the intermittent gear is unlocked again. This causes an inconvenience in that the power plate is driven and the ejected cassette is drawn into the tape player again. Therefore, at present, even though there is a waiting time, an autoloading mechanism that operates accurately as described above has been adopted.

[Object of the Invention] The present invention was proposed in order to overcome the drawbacks of the operating mechanism used in the conventional autoloading device as described above, and its purpose is to provide an autoloading mechanism using an intermittent gear. In a tape player where the stopper is released by a pack stopper that moves when a cassette is inserted, the specified operation is performed only when pressed from the cassette insertion direction, and when pressed from the opposite direction such as the cassette ejection direction. The object of the present invention is to provide a one-way operation mechanism that does not escape from the pressing force and perform the predetermined operation.

[Summary of the Invention] The one-way operation mechanism of the present invention is attached to the pack guide 1 of the tape player so as to be movable back and forth, and moves in two directions: the insertion side and the ejection side of the cassette as the cassette is attached and detached. A pack stopper 3, a reciprocating member 6 provided integrally with the pack stopper, and a reciprocating member 6 provided on the locus of the reciprocating member 6, moving under pressure from the reciprocating member 6, and driving the autoloading mechanism of the cassette during the movement. a driven member 8 for releasing the stopper 14 of the intermittent gear 13, and a pressing portion 6a that engages with the driven member 8 is provided on the operating side portion of the reciprocating member 6, The device is characterized in that knife edge-shaped relief portions 6b, 8b are formed in at least one of the operation side portion and the non-operation side portion of the driven member 8.

With this configuration, the present invention provides a reciprocating member 6 in which the stopper of the intermittent gear for driving the autoloading mechanism of the cassette is provided on the pack stopper that moves when the cassette is inserted.
It is released by pressing the driven member 8 that interlocks with the stopper of the intermittent gear. Therefore, once the cassette is inserted halfway into the pack guide, the autoloading mechanism automatically operates to pull the cassette into the tape player.

On the other hand, when ejecting a cassette, even if the pack stopper moves, its reciprocating member 6 does not move the driven member 8, so the autoloading mechanism does not operate and the cassette is drawn into the tape player again. The inconvenience will be resolved.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be specifically described based on the drawings of FIGS. 1 to 4.

(1) Structure Pack Stopper The pack guide 1 for holding a cassette inside a tape player is a box-shaped member with openings on its entire surface as a cassette insertion slot and on the bottom for setting the cassette on the reel base. A guide groove 2 is formed in the center of the upper surface of the pack guide 1 and extends in the front-rear direction of the tape player. A pack stopper 3 is slidably fitted into the guide groove 2. The rear end of the pack stopper 3 projects vertically into the pack guide 1, and this vertical protrusion forms an abutment part 4 with the tip of a cassette inserted into the pack guide 1. On the other hand, Packstopper 3
A claw portion 5 is formed at the front end of the pack guide 1 to engage a reel shaft insertion hole of a cassette inserted into the pack guide 1.

Reciprocating Member A reciprocating member 6 according to the present invention is integrally formed on the side edge of the pack stopper 3. This reciprocating member 6 reciprocates in the guide groove 2 together with the pack stopper 3, and the direction of movement from the front side to the rear side of the tape player is the operation side, and the direction of movement from the rear side to the front side is the operation side. The moving direction is the non-operating side. As shown in the enlarged view of FIG. 3, the end of the reciprocating member 6 on the operating side is a vertical pressing portion 6a, while the end of the reciprocating member 6 on the non-operating side is a tapered surface. This is a knife-edge-shaped relief part 6b with the top facing upward.

Driven Member A driven member 8 is rotatably attached to the support frame 7 extending from the upper surface of the pack guide 1 around a support shaft 9 . A spring 10 is stretched between the driven member 8 and the support frame 7, and the driven member 8 is always biased clockwise. This driven member 8 is connected to a release plate 12 at a pin-shaped projection 11 provided integrally therewith. This release plate 1
Reference numeral 2 is supported so as to be movable in the front and back direction with respect to the frame of the tape player, and a stopper 14 of the intermittent gear 13 is mounted on the opposite side (front end) of the connection part with the driven member 8. A protruding piece 15 is provided for pressing in the releasing direction. Note that the intermittent gear 13 has a stopper 14 around it.
The stopper 14 has a recess 16 that engages with the tip of the stopper 14. Further, the stopper 14 is rotatably attached to the support shaft 17, and a contact portion 18 of the protrusion 15 of the release plate 12 is provided on the opposite side of the portion that engaged with the recess 16 of the intermittent gear 13. It is being

By the way, a part of such driven member 8 is located on the locus of movement of the reciprocating member 6, and a portion of this driven member 8 facing the pressing portion 6a of the reciprocating member 6 is shown in FIG. As shown in the cross-sectional view, a vertically steep pressed portion 8a is formed. As shown in the plan view of FIG. 1, this pressed portion 8a is formed at a constant angle with respect to the direction of movement of the reciprocating member 6 toward the operation side. On the other hand, in the driven member 8, on the opposite side of the pressed portion 8a, that is, on the non-operating side,
A knife-edge shaped relief portion 8b with a downwardly tapered surface is formed.

(2) Operation The operation of the one-way operating mechanism of this embodiment having the above-mentioned configuration is as follows.

During operation...Figures 1 and 3 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 pushes the tape along the guide groove 2 due to the pushing force of the cassette. Start moving toward the back of the player. Then, the reciprocating member 6 integrally formed with the pack stopper 3 moves toward the operation side, and the pressing member 6a of the reciprocating member 6 hits the pressed portion 8a of the driven member 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 driven member 8 is pressed by the reciprocating member 6.
rotates counterclockwise about the support shaft 9 against the force of the spring 10.

Therefore, the release plate 12 that is engaged with the driven member 8 at the projection 11 moves toward the front side of the tape player, and the projection piece 15 at the front end presses the contact portion 18 of the stopper 14. do. Then, this stopper 14 rotates counterclockwise around the support shaft 17, and as a result, the stopper 14
The tip of the intermittent gear 13 is removed from the recess 16, and the intermittent gear 13 becomes able to rotate freely.

As a result, the driving force from the motor side is transmitted to this intermittent gear, and the power plate driven by the intermittent gear is driven, and the pack guide 1, which has retracted the cassette, is lowered onto the reel base by the driving force of this power plate. Then, loading of the cassette is completed.

When not in operation...Figures 2 and 4 If the cassette during playback reaches the end of the tape,
Or press the eject button on the tape player.
The stopper 14 and the recess 16 are disengaged, and the intermittent gear 13 starts rotating. Then, the pack guide 1 is raised from above the reel base by the power plate interlocked with the intermittent gear 13, and the cassette in the pack guide 1 is moved toward the front side of the pack stopper 3 driven by the power plate. As it moves, it is pulled out from inside the pack guide 1.

Here, when the pack stopper 3 moves toward the front along the guide groove 2, the reciprocating member 6 intersects with the driven member 8. However, the non-operating side of the reciprocating member 6 is a knife-edge shaped relief part 6b with the tapered part facing upward, and the non-operating side of the driven member 8 is also a knife-edge shaped escape part 6b with the tapered part facing downward. Because of the relief portion 8b, the reciprocating member 6 enters and passes under the driven member 8, so that the two do not engage with each other. Therefore,
Despite the movement of the reciprocating member 6, the driven member 8 does not rotate about the support shaft 9. In this way, when the cassette is ejected, even if the reciprocating member 6 and the driven member 8 intersect, the driven member 8 will not move the release plate 12, so the stopper 14 of the intermittent gear 13 will not come off. This eliminates the inconvenience of the power plate being driven and the cassette being drawn into the pack guide again.

(3) Effects of the Embodiment As described above, according to the present embodiment, it is possible to operate the driven member 8 only when the cassette is installed and release the lock of the intermittent gear, which is called tape end detection. It becomes possible to directly unlock the intermittent gear by inserting the cassette without employing indirect means. As a result, the time from the start of insertion of the cassette to the start of retraction by the intermittent gear is extremely shortened, and the conventional waiting time is eliminated, resulting in the effect that the cassette can be operated more smoothly.

[Other Embodiments] In the illustrated embodiment, the driven member 8 is operated when the cassette is installed, and the driven member 8 is in the non-operated state when the cassette is ejected. If the positions of the parts are reversed, the predetermined operation can be performed only when the cassette is ejected.

For example, if a power supply switch is provided at the back of the pack guide, and the operating mechanism of the present invention is provided on the entrance side of the pack guide, the power switch is turned off only when the cassette is ejected.
At the time of ejecting, the cassette can be pulled out further to the front side than the cassette retraction starting point, making it easier to take out the cassette from the pack guide.

Instead of attaching the driven member 8 rotatably to the support shaft 9, the driven member 8 may also be provided slidably in the same direction as the reciprocating member 6 or in the right angle direction.

The knife edge-shaped escape part can be provided only on either the reciprocating member 6 or the driven member, and the direction of the tapered part of the knife edge is opposite to that shown in the drawings, with the reciprocating member 6 side facing downward. It is also possible to pass above the driven member 8.

[Effects of the Invention] As described above, according to the present invention, the reciprocating member can be moved in a fixed direction with a simple configuration in which a pressing portion and a knife-edge relief portion are provided at the ends of the reciprocating member and the driven member. It becomes possible to provide a one-way operating mechanism in which the driven member operates only when

In particular, in conventional autoloading mechanisms using intermittent gears, after the power switch is turned on, the tape end detection device detects the absence of a cassette and unlocks the intermittent gears. It was taking a long time to pull in the cassette. However, in the present invention, since the lock of the intermittent gear is not released when the cassette is ejected, it is possible to directly release the lock of the intermittent gear by inserting the cassette. Start-up can be done in a short time.

[Brief explanation of drawings]

FIGS. 1 and 2 are plan views showing one embodiment of the one-way operating mechanism of the present invention, with FIG. 1 showing the operating state and FIG. 2 showing the non-operating state. 3 and 4 are cross-sectional views of the reciprocating member and the driven member in the embodiment, with FIG. 3 showing the state in operation and FIG. 4 showing the state in non-operation. DESCRIPTION OF SYMBOLS 1... Pack guide, 2... Guide groove, 3... Pack stopper, 4... Contact part, 5... Claw part, 6... Reciprocating member, 6a... Pressing part, 6b... Relief part, 7... Support frame, 8... Followed member, 8a...Pressed part, 8b...Escape part, 9...Spindle, 10...Spring, 11...Protrusion, 12...Release plate, 13...Intermittent gear, 14
...stopper, 15...protrusion, 16...recess, 17...
Support shaft, 18...contact part.

Claims (1)

[Scope of Claims] 1. A pack stopper 3 which is attached to the pack guide 1 of the tape player so as to be movable back and forth and which moves in two directions, the insertion side and the ejection side of the cassette as the cassette is attached or removed, and which is integrated with the pack stopper. a reciprocating member 6 provided on the reciprocating member 6; and a stopper 14 of an intermittent gear 13 that is provided on the locus of the reciprocating member 6, moves under pressure from the reciprocating member 6, and drives the autoloading mechanism of the cassette during the movement. Followed member 8 to release
A pressing portion 6a that engages with the driven member 8 is provided on the operating side portion of the reciprocating member 6, and a pressing portion 6a that engages with the driven member 8 is provided between the non-operating side portion of the reciprocating member 6 and the non-operating side portion of the driven member 8. The one-way operating mechanism is characterized in that knife edge-shaped relief parts 6b and 8b are formed on at least one of the parts.