JPH0650846Y2 - Cassette tape player cassette ejection mechanism - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cassette ejection mechanism of a cassette tape player.

<Prior Art> In a conventional cassette tape player, an eject lever that is driven in the front-rear direction by a motor, an insertion / removal lever that is directly connected to the eject lever and that rotates in conjunction with movement of the eject lever, A cassette ejection mechanism is formed by a slider that is attached to the end of the insertion / removal lever and engages with the cassette inserted in the player to insert and transfer the cassette in the ejection direction. The insertion / removal lever is forcibly rotated so that the slider moves in the cassette ejection direction.

<Problems to be Solved by the Invention> According to the above-described conventional technique, the insertion / removal lever directly connected to the eject lever is forcibly rotated in accordance with the movement of the eject lever, and therefore, during the ejection operation during cassette ejection. When the cassette is caught on the mechanism inside the player with
Or if you mischievously push the cassette in the middle of ejecting it inward, the load is directly applied to the eject lever and the motor via the insertion / ejection lever, the motor burns out, or the eject lever and insertion / ejection lever There was a major failure such as damage to the connecting part.

<Means for Solving the Problems> The present invention is a cassette ejecting mechanism designed to solve the problems, and includes an eject lever that is driven in the front-rear direction by a motor and an engaging portion that engages with the eject lever. A guide lever that rotates with the movement of the eject lever in the front-rear direction, and an insertion / removal lever that is connected to the guide lever via a spring and that moves in conjunction with the rotation operation of the guide lever. A slider attached to one end of the insertion / removal lever for locking the cassette inserted in the player and transferring the cassette in the inserting and ejecting directions, and the guide lever in the ejecting direction of the cassette. When rotating, the insertion / removal lever is moved by being pulled by the spring, and the slider transfers the cassette in the ejection direction. Of.

<Operation> When the guide lever is rotated, the insertion / removal lever is rotated by being pulled by the spring. Therefore, in the case where the cassette is caught by the mechanism part in the player during the discharging operation and cannot move further in the discharging direction, the guide lever continues to rotate to reach the discharging completed state, but the spring extends. Therefore, the insertion / removal lever can stay in the same position. Therefore, no load is directly applied to the fixing pin of the guide lever, the L-shaped guide groove of the eject lever, the main motor, or the like.

<Embodiment> First, the cassette tape player according to the present invention will be described separately for the insertion mechanism and the ejection mechanism.

The other recording / playback functions, tape drive mechanism, etc. are the same as those of the conventional structure, and their description is omitted.
The cassette tape player of the present invention also includes a recorder.

FIG. 1 is a plan view of a cassette tape player showing a state in which a cassette tape T is pushed in, FIGS. 2 and 3 are schematic plan views for explaining the driving of an insertion / removal lever and a guide lever, and FIG. FIG. 5 is an enlarged side view of the main part of the eject lever showing a state of being pushed in, FIG. 6 is an enlarged sectional view showing the structure of the slider, and FIG. 8 and 9 are schematic plan views of the gear train for moving the eject lever when the tape is inserted, FIG. 9 is a schematic side view of the same, and FIG.
FIG. 11 is a schematic plan view for explaining the drive of the insertion / removal lever and the guide lever at the time of reproducing or cassette tape ejection, and FIG. 11 is a schematic plan view showing a state where the main switch is turned on and off by the operation plate of the eject lever. 12 is a side view of the eject lever, FIG. 12 is a side view of the eject lever, FIG.
The figure is an enlarged side view of the relevant part, and FIG. 14 is a schematic plan view of the gear train for moving the eject lever when the gear train is regenerated or the cassette tape is ejected.

That is, the cassette tape player has a main switch 2, a main motor 3, side plates 4 and 5, and various components constituting a reproducing mechanism, a tape feeding mechanism and the like attached to predetermined positions of the chassis 1. The main switch 2 gives the main motor 3 normal rotation (counterclockwise rotation in FIG. 14).

As shown in FIG. 1, a cassette holder 6 is provided on the cassette insertion opening side between a pair of side plates 4 and 5 provided on both sides of the chassis.
And a holder pressing plate 7 is arranged on the main switch 2 side. As shown in FIG. 7, a cassette receiving plate 8 is provided at a lower part of the cassette holder 6 integrally with the cassette holder 6 with a predetermined gap, while the cassette holder 6 is vertically rotated by a holder pressing plate 7. It is possible to install.

On the other hand, a through hole 9 is provided at an appropriate position on the holder pressing plate 7 side of the cassette holder 6, and a tip bending portion 11 of a leaf spring 10 attached to the upper surface of the cassette holder 6 is fitted and inserted into the through hole 9. There is. The leaf spring 10 prevents the cassette tape from jumping out of the tape player when the cassette tape is ejected.

A guide groove 12 is provided substantially in the center of the holder pressing plate 7 substantially parallel to the insertion / removal direction of the cassette tape T.
A slider 13 is slidably mounted on the slider 12. As shown in FIG. 6, at one end of the slider 13, an engaging portion 14 that engages with the bent end 11 of the leaf spring described above is formed, and at the other end, a cassette contact plate 15 is provided. A free end of an insertion / removal lever 17 is rotatably connected to the upper surface of the slider 13 via an extraction pin 16.

That is, as shown in FIG. 2, the base portion 18 of the insertion / removal lever 17 is pivotally supported on a horizontal side (not shown) of the side plate 4 through which the guide pin 20 is penetrated together with the guide lever 19. This guide pin
20 serves as a pivotal support shaft for the insertion / removal lever 17 and the guide lever 19 and penetrates into a long groove 23 provided in the horizontal portion 22 of the eject lever 21, and the eject lever 21
To guide the movement of. Further, the fixing pin 24 provided near the base portion 19a of the guide lever 19 has an L-shaped guide groove 25 of the horizontal portion 22.
It has been inserted into the.

On the other hand, a corrugated groove 26 is formed substantially in the center of the base portion 18 of the insertion / removal lever 17, and the protrusion 29 of the switch lever 28 fitted in the corrugated groove 26 is rotated with the rotation of the insertion / removal lever 17. Working along the premises, the switch lever 28 rotates and the main switch 2
Turn on and off the leaf switch 30 installed above.

The main switch 2 and the leaf switch 30 are for controlling the microcomputer and rotating the main motor 3, but the operation is as follows.
When the leaf switch 30 is turned on while the switch is off, the main motor 3 is rotated in the reverse direction (clockwise rotation in FIG. 8). In this state, that is, when the main switch 2 is turned ON while the leaf switch 30 is ON, the main motor 3 normally rotates (counterclockwise rotation in FIG. 14), and although not particularly shown, the capstan shaft and the reel are rotated. Rotate the shaft normally, and put it in a replay drive state. In this state, that is, when the leaf switch 30 and the main switch 2 are both ON and the main switch 2 is OFF, the main motor 3 continues to rotate normally, and then the leaf switch 30 is OFF. The rotation of the motor 3 is stopped. Further, a spring spring 31 is stretched between the free end 19b of the guide lever 19 and the central portion of the insertion / removal lever 17. Therefore, although the insertion / removal lever 17 and the guide lever 19 are always urged in the direction of approaching them, the large diameter portion 24a of the fixing pin 24 is
Is in contact with one end of the insertion / removal lever 17, and its movement is restricted.

Further, as also shown in FIGS. 4 and 5, a guide pin 32 is erected at a predetermined position of the side plate 4, and the guide pin 32 is fitted into a horizontal long groove 33 provided in the eject lever 21 to horizontally move the eject lever 21. To guide. Further, the lifting pin 34 is erected outward from the side surface of the holder pressing plate 7 and the lifting pin 34 is attached to the eject lever 21.
It is loosely fitted in the stepped guide groove 35 provided in the. Further, the elevating pin 34 is also fitted in the vertical groove 36a of the rotating plate 36. That is, when the lifting pin 34 moves in the stepped guide groove 35, the rotating plate 36 rotates about the pivot pin 37 (in the arrow direction). The rotating plate 36 has a coil spring 39 stretched between a spring hook 38 provided in the vicinity of the pivot pin 37 and the elevating pin 34 so that the eject lever 21 is reliably positioned in the cassette insertion direction. This is to prevent malfunction.

On the other hand, a rack 40 is attached below the eject lever 21, and a tension spring 42 between the rack 40 and a spring locking piece 41 provided at the rear end of the eject lever 21 is stretched to prevent backlash of the rack 40. ing. The rack 40 meshes with a small gear 43 that is coaxial with the eject gear.

Next, a cassette tape mounting operation will be described.

As shown in FIG. 1, the cassette tape T is inserted from the cassette insertion port and pushed into the cassette holder 6 (in the arrow direction).

Then, as shown in FIG. 6, the front side surface of the cassette tape T
Ta contacts the cassette contact plate 15 of the slider 13, and the tip 14a of the engaging portion 14 of the slider 13 engages with the reel hole Tb of the cassette tape T. When the cassette tape T is further pushed in slightly, the slider 13 causes the insertion / removal lever 17 to slightly rotate around the guide pin 20 in the direction of the arrow against the biasing force of the spring 31, as shown in FIG. At this time, the protrusion 29 in the corrugated groove 26 is forcibly rotated by the corrugated groove 26 and moved from the main switch 2 side to the spring 31 side, so that the switch lever 28 is slightly rotated clockwise. The leaf switch 30 is simply turned on to turn on the leaf switch 30, and the main motor 3 is rotated in the opposite direction to the normal rotation, that is, in the clockwise direction which is the arrow direction in FIG. 8 (see FIG. 3). Further, the guide lever 19 is slightly rotated by the spring spring 31 by the slight rotation of the insertion / removal lever 17, and the fixing pin 24 is gradually moved from the upright portion 25a of the L-shaped guide groove 25 to the horizontal portion 25b. Due to this movement, the eject lever 21 also slightly moves in the cassette insertion direction.

When the main motor 3 rotates in the reverse direction, the gear train described later rotates and the small gear 43 also rotates. Therefore, the small gear 43
The eject lever 21 is further moved to the cassette insertion direction side (the arrow direction in FIG. 1) by the rack 40 that meshes with the rack 40. When the eject lever 21 moves, first, the guide lever 19
Rotates further due to the relationship between the fixed pin 24 and the L-shaped guide groove 25. With the rotation of the guide lever 19, the insertion / removal lever 17 also rotates and moves the slider 13 rearward. The cassette tape T is automatically pulled to the rear by the reel hole Tb engaged with the tip 14a of the engaging portion 14 of the slider 13 by the movement of the slider 13. When the eject lever 21 further moves in the cassette insertion direction, the lift pin 34 of the holder pressing plate 7 moves from the upper horizontal portion 35a of the stepped guide groove 35 provided in the eject lever 21 to the intermediate slant portion 35b and further to the lower horizontal portion. Up to 35c. By this movement, the holder pressing plate 7 on which the elevating pins 34 are erected is rotated downward, so that the cassette holder is also lowered, and the cassette tape T is localized at the lower playing position. When the cassette tape T is positioned at a predetermined playing position and the eject lever 21 moves to the end in the cassette insertion direction, the tip locking piece of the eject lever 21 as shown in FIG.
21a engages with the tip end portion 27a of the operation plate 27 of the main switch 2, rotates the operation plate 27, and turns on the main switch 2. Therefore, the main motor 3, which has been rotating in the reverse direction until now, stops rotating in the reverse direction, becomes a normal rotation, and starts the reproduction state. or,
The rotation plate 36 is rotated by the movement of the elevating pin 34 and the movement of the eject lever 21, and the coil spring 39 is reversed. Therefore, the eject lever 21 is always biased in the cassette insertion direction, and the tip portion 27a of the operation plate 27 of the main switch 2 that is hooked on the tip locking piece 21a of the eject lever 21 (see FIG. 12). (See) is prevented from returning to the original.

FIG. 8 is a schematic plan view showing a gear train for moving the eject lever 21, and FIG. 9 is a schematic side sectional view of the same.

That is, the drive lever 44 switches the meshing of the gears to transmit the drive force of the main motor 3 to the eject gear A, and the small gear 43 coaxial with the eject gear A is rotated. The rotation of the small gear 43 causes the eject lever 21 to move toward the cassette insertion direction via the rack 40. The drive lever 44 has one end held by a plunger 46 of a solenoid 45, the other end engaged with a seesaw lever 47, and a transmission gear (55) pivotally supported at a predetermined position. It is formed so as to rotate about. The drive lever 44 is biased in the clockwise direction by a spring (not shown). The seesaw lever 47 moves both ends up and down around a central pivot pin 49, one end engages with the drive lever 44, and the other end is biased by the spring spring 50. Moreover, the protrusion 51 of the eject lever 21
The seesaw lever 47 remains engaged with the drive lever 44 while moving to a predetermined reproduction position. That is, as shown in FIG. 8, the protruding side 51 of the eject lever 21 contacts the seesaw lever 47 to prevent its rotation, and the protruding piece 47a of the seesaw lever 47 engages with the protruding piece 44a of the drive lever 44. Since the drive lever 44 cannot rotate clockwise, the driving force of the main motor 3 is transmitted to the small gear 43.
Therefore, when the main motor 3 rotates in the counterclockwise clockwise direction, the eject gear A rotates in the reaction clockwise direction via the idling gears 52, 53, 54 and the transmission gear 55.

Therefore, the rack 40 moves in the direction of the arrow by the small gear 43 meshing with the eject gear A. The protrusion 51 to which the rack 40 is attached also moves in the same direction as the eject lever 21, and the rotation prevention of the protrusion 51 with respect to the drive lever 44 is released.
The seesaw lever 47 rotates clockwise by the elastic force of the spring 50, and the engagement between the projection piece 44a provided at the tip of the drive lever 44 and the projection piece 47a provided on the seesaw lever 47 is released. Therefore, the drive lever 44 rotates slightly clockwise by the urging force of the spring. As a result, the transmission gear 55 releases the meshing with the idling gear 53, stops the rotation of the small gear 43, and moves the so-called eject lever 21. It stops (see Figure 14).

Therefore, when the tape is reproduced, the reproduction state is always maintained without transmitting the driving force from the main motor 3.

Next, the cassette tape ejection operation by the eject mechanism will be described.

The eject operation is an operation which is completely opposite to the above-described mounting of the cassette.

When an eject button (not shown) is turned on, the plunger 46 of the eject solenoid 45 is attracted based on this eject signal. That is, in the state shown in FIG. 14, the drive lever 44 is rotated in the counterclockwise direction (arrow direction) about the pivot shaft 48 by the suction of the plunger 46. Therefore, the transmission gear 55 meshes with the idling gear 53, and the driving force of the main motor 3 is transmitted to the other idling gear 54.
To the eject gear A, and the small gear 43 is rotated clockwise.

As described above, since the main motor 3 is rotating in the counterclockwise direction during tape reproduction, the eject gear A is the small gear 43.
The rack 40 is moved in the direction of the arrow via. Also, the protrusion 51 of the eject lever 21 moves from the state shown in FIG. 14 to the state shown in FIG. Therefore, the protrusion 51 presses the seesaw lever 47, counteracts the urging force of the spring spring 50, and rotates the seesaw lever 47 in the counterclockwise direction.
a engages with the protrusion 44a of the drive lever 44, and the drive lever is moved to the seventh position.
Hold as shown.

When the eject lever 21 moves back and forth, it returns from the position shown in FIG. 12 to the state shown in FIG. 4, and the insertion / removal lever 17 and the guide lever 19 move from the position shown in FIG. 10 to the state shown in FIG. Is to move.

That is, as described above, when the eject button is turned on, the drive lever 44 is engaged with the seesaw lever 47 to be in a locked state, and even when the application of the eject solenoid 45 is turned off, the meshing state between the idling gear 53 and the transmission gear 55 is maintained. It Also, the eject lever 21 moves from the position shown in FIG. 10 to the second position.
When returning to the state shown in the figure, the eject lever 21 is rotated by the small gear 43 as shown in FIGS.
Move in the direction of the arrow via 40. Therefore, the elevating pin 34 provided on the holder pressing plate 7 is attached to the lower horizontal portion 35 of the step guide groove 35.
It moves from c to the upper horizontal portion 35a through the intermediate slant portion 35b.
This movement raises the cassette holder 6 to the position shown by the dotted line in FIG. When the eject lever 21 moves further,
The fixed pin 24 of the guide lever 19 again moves to the upright portion 25a of the L-shaped guide groove 25, and rotates in the clockwise direction about the guide pin 20. When the guide lever 19 rotates,
The insertion / ejection lever 17 is also rotated by being pulled by the spring 31. Therefore, for example, when the cassette T is caught by the mechanical portion in the player during the discharging operation and cannot move further in the discharging direction, the guide lever 19 continues to rotate to reach the discharging completion state, but the spring 31 By extending, the insertion / removal lever 17 can stay in the same position. Therefore, the fixing pin 24 of the guide lever 19, the L-shaped guide groove 25 of the eject lever 21, the main motor 3 and the like are not directly loaded, and the device can be prevented from being damaged.

On the other hand, when the insertion / removal lever 17 rotates, the slider 13 attached to its free end moves the slider 13 to the reaction side in the cassette insertion direction. Therefore, the slider 13 starts to move in the direction opposite to the cassette tape insertion direction in which the cassette abutting plate 15 and the engaging portion 14 are engaged. Further, as a result of the protrusion 29 of the switch lever 28 moving in the corrugated groove 26 of the insertion / removal lever 17 during this movement, the leaf switch 30 is turned to the OFF state. The rotation of the main motor 3 is stopped by turning off the leaf switch 30, but this rotation is stopped with a slight delay after the leaf switch 30 is turned off by the microcomputer. It returns to the state of FIG. When the eject lever 21 returns, the insertion / removal lever 17 and the guide lever 19 also return to their original positions, and the cassette tape T is ejected to the state shown in FIG. Also, the rotation plate is moved by the movement of the eject lever 21 and the movement of the lifting pin 34.
36 rotates and reverses the coil spring 37 (reverses the state of FIG. 13 to the state of FIG. 5).

<Effect> As described above, according to the cassette tape player of the present invention, the eject lever that is driven by the motor in the front-rear direction and the engaging portion that engages with the eject lever are provided. A guide lever that rotates with the movement, an insertion / removal lever that is coaxially fixed to the guide lever, is connected via a spring, and moves in conjunction with the rotation operation of the guide lever, and the insertion / removal lever. A slider that is attached to one end side of the slider and that locks the cassette inserted in the player and transfers the cassette in the inserting and ejecting directions, and is fitted and inserted into a groove provided at a substantially central portion of the inserting / removing lever. And a switch lever for switching the drive of the motor in conjunction with the movement of the insertion / removal lever, and the guide lever rotates in a direction to eject the cassette. At this time, the insertion / removal lever is moved by being pulled by the spring so that the slide transfers the cassette in the ejecting direction, so that, for example, when the cassette is caught in the mechanism part in the player during the ejecting operation, Even if the cassette being ejected is pushed inward in the player, the guide lever continues to rotate and reaches the ejection completed state.
The extension of the spring allows the lever to remain in the same position. Therefore, the load is not directly applied to the guide lever, the eject lever, the main motor, and the like, and damage to the discharge mechanism and burnout of the motor can be prevented in advance. Moreover, the switch can be switched by the movement of the insertion / removal lever, and the timing for driving the motor can be easily adjusted. Further, since the insertion / removal lever and the guide lever are coaxially fixed to each other, the overall structure can be made compact.

[Brief description of drawings]

FIG. 1 is a plan view of a cassette tape player, FIG. 2 is a schematic plan view illustrating an insertion / removal lever and a guide lever, FIG. 3 is a schematic plan view illustrating the rotation state, and FIG. , A side view of the eject lever, FIG. 5 is an enlarged side view of the relevant part, FIG. 6 is an enlarged sectional view of the slider, FIG. 7 is a side view of the cassette holder with a part thereof omitted, and FIG. FIG. 9 is a schematic plan view of a row, FIG. 9 is a schematic side view of the same row, FIG. 10 is a schematic plan view illustrating driving of an insertion / removal lever and a guide lever, and FIG. 11 is a relationship between an eject lever and a main switch. Schematic plan view, FIG. 12 is a side view of the eject lever, FIG. 13 is an enlarged side view of the relevant part, and FIG. 14 is a schematic plan view of the gear train. 1 …… Chassis, 2 …… Main switch, 3 …… Main motor, 4,5 …… Side plate, 6 …… Cassette holder, 7 …… Holder pressing plate, 13 …… Slider, 17 …… Insertion / removal lever, 19 …… Guide lever, 20 …… Guide pin, 21 …… Eject lever, 24 …… Fixing pin, 25 …… L-shaped guide groove, 32 …… Guide pin, 34 …… Lift pin, 35 …… Step-shaped guide groove , 36 ...... Rotating plate, 39 ...... Coil spring, 40 ...... Rack, 43 …… Small gear, 44 …… Drive lever, 45 …… Solenoid, 47 …… Seesor lever, 52, 53, 54 …… Idling gear, 55: Conduction gear, T: Cassette tape, A: Eject gear.

Claims (1)

[Scope of utility model registration request] 1. An eject lever (21) driven in a front-rear direction by a motor (3), and an engagement portion (24) engaging with the eject lever (21), the front-rear direction of the eject lever (21). A guide lever (19) that rotates with the movement of the guide lever (19), is coaxially fixed to the guide lever (19) and is connected via a spring (31), and the guide lever (19)
The insertion / removal lever (17) that moves in conjunction with the rotating operation of the cassette, and the cassette (T) attached to one end of the insertion / removal lever (17) and inserted into the player to lock the cassette (T). Slider (13) for transferring T) in the insertion and ejection directions
And the motor (3) in conjunction with the movement of the slider (13).
A switch lever (28) for switching the drive (30) for switching the drive of the cassette (T), and the spring (31) when the guide lever (19) rotates in the direction to eject the cassette (T). ), The insertion / removal lever (17) moves, and the slider (13) transfers the cassette (T) in the ejection direction. A cassette ejection mechanism for a cassette tape player.