JP3026934B2 - Cassette eject device and cassette tape player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a cassette ejecting device for ejecting a loaded cassette by the rotational force of a motor, and a cassette tape player provided with the cassette ejecting device.

[0002]

2. Description of the Related Art Conventionally, for example, in a cassette tape player, as described in Japanese Patent Publication No. 3-79946, when a loaded cassette is ejected, a tape driving motor is also used. A cassette ejecting device for ejecting the cassette by the rotational force of the cassette is known.

[0003] In the cassette ejecting apparatus which also serves as a motor for running the tape, a solenoid is operated by an ejecting operation, and the operation of the solenoid forms a transmission path of a rotational force from the motor to the ejecting mechanism. The cassette is ejected by an ejection mechanism to which a force is transmitted.

By the way, when the cassette is loaded, the head plate advances to the reproduction position (the position corresponding to the cassette loading), and the head and the pinch roller on the head plate enter the cassette half. It is necessary to move the head and the pinch roller on the head plate to the retracted position (the position corresponding to the ejection) to retract from the cassette half. Therefore, if the timing is not adjusted so that the ejecting operation of the cassette is started after the retreating movement of the head plate is completed at the time of ejecting, an ejecting failure such as the cassette being jammed during ejecting occurs. Therefore, accurate timing of the retreating movement of the head plate and the ejection operation can greatly contribute to the reduction of ejection failure.

Therefore, in order to accurately set the timing of the retreating movement of the head plate and the ejecting operation,
An evacuation solenoid for starting the evacuation movement of the head plate and an ejection solenoid for starting the ejection operation are used. After the retracting movement of the plate is completed, it is necessary to operate the ejecting solenoid to eject the cassette.

[0006]

However, in order to accurately set the timing between the retreating movement of the head plate and the ejecting operation, an evacuation solenoid for starting the retreating movement of the head plate and the ejecting operation are started. For this purpose, an ejecting solenoid must be used, and the increase in the number of solenoids leads to a problem of complexity and size.

The present invention has been made in view of such a point, and does not use a plurality of solenoids for setting the timing between the retreating movement of the head plate and the ejecting operation, and the transmission mechanism of the ejecting mechanism is used. It is an object of the present invention to provide a cassette ejecting device which can set timing, and which can be simplified and downsized, and a cassette tape player provided with the cassette ejecting device.

[0008]

According to a first aspect of the present invention, when a cassette in a loaded state is ejected, a head plate having a head is moved from a cassette loading position to an ejection position, and a motor is rotated. A cassette ejecting device for ejecting the cassette by force, a solenoid operated by an ejecting operation, a head plate moving mechanism for moving the head plate from a cassette loaded position to an ejected position when the solenoid is ejected, and the solenoid An eject mechanism for ejecting the cassette by receiving a rotational force from the motor at the time of the eject operation, and an eject mechanism provided at the eject mechanism, wherein the head plate is ejected at the time of the eject operation of the solenoid. And a differential transmission means for transmitting the rotational force from the motor when the head plate moves to the eject corresponding position while not transmitting the rotational force from the motor until the head plate moves to the eject corresponding position. It is characterized by being.

[0009] Then, by the eject operation, the solenoid operates to eject, the movement of the head plate to the position corresponding to the eject is started, and the rotational force from the motor is applied to the eject mechanism. Even if the rotational force from the motor is given to the eject mechanism, the rotational force from the motor is not transmitted until the head plate moves to the position corresponding to the eject by the differential transmission means in the eject mechanism, and the head plate Is moved only to the position corresponding to the ejection, and the ejection operation is not performed. At the timing after the head plate moves to the position corresponding to the ejection, the transmission of the rotational force from the motor is started by the differential transmission means, and the cassette is ejected by the ejecting mechanism that receives the rotational force from the motor.

According to a second aspect of the present invention, there is provided the cassette ejecting device according to the first aspect.
The differential transmission means is configured to rotate by receiving a rotational force of a motor.
And a second timing gear having one end side in the tooth width direction meshing with the first timing gear and rotating. The first timing gear has one of the surrounding tooth portions. A protruding tooth portion protruding from the tooth portion to the other end side in the tooth width direction; a notch formed in the second timing gear so as to be disengaged from the first timing gear on a part of a peripheral tooth portion; And a tooth receiving portion that is capable of meshing with the convex tooth portion is provided at a position adjacent to the tooth portion on the upstream side in the gear rotation direction of the notch portion and at the other end side in the tooth width direction. .

In the standby state before the ejecting operation, the first timing gear faces the notch of the second timing gear and is in a non-meshing state. At the time of the ejection operation of the solenoid, only the first timing gear rotates by receiving the rotational force of the motor, and after the first timing gear rotates by a predetermined angle, that is, the time lapse until the head plate moves to the position corresponding to the ejection. Thereafter, the convex portion of the first timing gear meshes with the tooth receiving portion of the second timing gear, and the second timing gear rotates,
The peripheral teeth adjacent to the notch of the rotating second timing gear mesh with the first timing gear, the second timing gear rotates, and the cassette is ejected.

According to a third aspect of the present invention, there is provided a cassette tape player for loading a cassette tape into a predetermined cassette loading position, and a head plate having a head when the cassette tape is loaded is moved from an eject position to a cassette loading position. 3. A head plate moving device for moving, a running device for running the tape of the cassette tape, a cassette eject device according to claim 1 or 2, and a common device for applying a rotational force to the head plate moving device, the running device and the cassette eject device. And a motor.

By providing the cassette ejecting device according to the first or second aspect, the ejecting operation can be performed by the motor common to the head plate moving device and the traveling device. It should be noted that the cassette tape player includes not only for reproduction but also for reproduction / recording and recording.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cassette tape player to which a cassette eject device of the present invention is applied will be described below with reference to the drawings.

FIG. 5 is a perspective view of a cassette tape player before a cassette is loaded, and FIG. 6 is a perspective view of the cassette tape player in a cassette loaded state.

The cassette tape player has a chassis 1, on which a cassette loading device 2, a head plate moving device 3 (shown in FIG. 1), and a traveling device 4 (FIG. 1).
), A cassette eject device 5, a drive device 7 having a motor 6, and the like.

The cassette mounting device 2 includes a cassette tape C
Has a cassette holder 11 arranged on the chassis 1, and the cassette tape C is inserted through a front opening (lower right side in FIGS. 5 and 6) of the cassette holder 11. Insertion or removal takes place. The cassette holder 11 is rotatably supported by the front end of a cassette holder supporting plate 12 which is pivotally supported on the rear side of the chassis 1 (upper left in FIGS. 5 and 6) and which can swing up and down.

A left side wall 1a erected on the left side edge of the chassis 1.
A slide lever 13 that engages with the cassette holder support plate 12 and the cassette holder 11 is slidably mounted in the front and rear direction. The slide lever 13 and the cassette holder support plate 12 are connected to each other when the slide lever 13 moves rearward as shown in FIG.
6 and the projection 14 of the slide lever 13 is moved downward so that the cassette holder support plate 12 is lowered when the slide lever 13 moves forward as shown in FIG. It is engaged with the inclined groove 15. When the slide lever 13 moves backward as shown in FIG. 5, the slide lever 13 and the cassette holder 11 move the cassette holder 11 to the upper cassette attaching / detaching position, and as shown in FIG. When the is moved forward, the cassette holder 11 is lowered to the lower cassette loading position (reproduction position).

The slide lever 13 is urged forward by a slide spring 16 stretched between the slide lever 13 and the front end of the left side wall 1a, and as shown in FIG. Is moved to a cassette attaching / detaching position) by a lock mechanism (not shown). When the cassette tape C is inserted to a predetermined position of the cassette holder 11, the lock mechanism is operated in the release direction via the cassette catcher 18, and the lock of the slide lever 13 is released.

A slide groove 17 is formed in the cassette holder support plate 12 along the front and rear direction, and a cassette catcher 18 which engages with the cassette tape C inserted into the cassette holder 11 is slidable in the front and rear direction in the slide groove 17. Is engaged. A rotation lever 19 is rotatably supported on the upper surface of the cassette holder support plate 12, and a toggle spring 20 is connected between the rotation lever 19 and the cassette catcher 18. By the toggle spring 20, the cassette catcher 18 is turned forward or backward and biased.

As shown in FIG. 5, when the cassette loading device 2 is stopped before loading the cassette, the slide lever 13 moves rearward against the slide spring 16 and is locked by the lock mechanism. 11 is raised to the cassette mounting / dismounting position, and the cassette catcher 18 is urged forward by the toggle spring 20.

When the cassette tape C is inserted into the cassette holder 11 in this stopped state, the cassette catcher 18 is pushed backward by the cassette tape C against the toggle spring 20. When the cassette catcher 18 is pushed to a predetermined position where the elastic deformation of the toggle spring 20 is maximized, the biasing direction of the toggle spring 20 is reversed, and the cassette catcher 18 is pushed backward. When the cassette catcher 18 is pushed to a predetermined position, the lock of the slide lever 13 by the lock mechanism is released, the slide lever 13 is moved forward by the slide spring 16, and the cassette holder 11 and the cassette tape C are moved to the lower loading position. Is lowered. By lowering to the loading position, a pair of reels of the cassette tape C are moved with respect to a pair of reel shafts (not shown) of the traveling device 4 and a pair of capstan shafts (in case of auto-reverse or the like) arranged on the bottom surface of the chassis 1. The cassette half is positioned and inserted, and can be reproduced.

The cassette eject device 5 has an eject lever 31 slidably supported in the front-rear direction on the outer surface of the left side wall 1a of the chassis 1. The eject lever 31 is located between the front end of the left side wall 1a. It is urged forward by a stretched eject spring 32. A connecting portion 33 is formed above the eject lever 31, and a connecting rod 34 is connected between the connecting portion 33 and the rotating lever 19.

A safety lever 35 is slidably supported in the front-rear direction on the outer surface of the eject lever 31. A safety spring 36 is stretched between the safety lever 35 and the front end of the eject lever 31. At the rear end of the safety lever 35, an engagement piece 37 is formed.

The eject spring 32 and the safety spring 36
The relationship between the elastic force and the safety spring 36 is set stronger than the eject spring 32, and the safety lever
The eject lever 31 moves following the 35.

An eject arm 38 is swingably supported on a support shaft 39 as a fulcrum by a support plate 1b protruding from the rear left side of the chassis 1. The eject arm 38 is provided with an engagement piece 37 of a safety lever 35. An engagement piece 40 that engages with the front side is provided upright.

The motor 6 and the solenoid 41 are mounted on the support plate 1b of the chassis 1. Motor 6
Gives a rotational force to the head plate moving device 3, the traveling device 4, and the cassette eject device 5. Solenoid 41
Is for applying a rotational force from the motor 6 to the head plate moving device 3 and the cassette eject device 5, and is turned on when a solenoid drive switch (not shown) is turned on when the cassette tape C is loaded, and an eject button (not shown) Is turned on to de-energize.

In the cassette eject device 5,
As shown in FIG. 6, when the cassette tape C is loaded, the eject arm 38 is rotated clockwise in the drawing, and the eject lever 31 is moved to the eject spring 32.
, And a safety lever 35 is positioned forward on the eject lever 31 via a safety spring 36.

When the eject arm 38 is moved in the counterclockwise direction in the drawing (details will be described later, due to the driving force of the motor 6), the safety lever 35 is moved backward and the eject lever 38 is ejected via the safety spring 36. The lever 31 is moved backward. When the eject lever 31 is moved backward, the slide lever 13 located forward is moved by the slide spring 16.
The cassette holder 11 is moved rearward against the urging of the cassette holder 11 to the cassette attaching / detaching position, and the slide lever 13 is locked by the lock mechanism at the rearward position. At the same time, the rotating lever 19 is rotated counterclockwise in the figure by the connecting rod 34,
When the toggle spring 20 is rotated to a predetermined position where the elastic deformation is maximum, the biasing direction of the toggle spring 20 is reversed, the cassette catcher 18 is pushed forward, and the cassette holder raised to the cassette attaching / detaching position. The cassette tape C in 11 is pushed forward and ejected.

On the bottom surface of the chassis 1, a head plate 45 (see FIG. 1) on which a head (not shown) for performing magnetic reproduction in contact with the magnetic tape of the cassette tape C is mounted.
Are arranged. When the cassette tape C is loaded by the head plate moving device 3, the head plate 45 moves from a position corresponding to an ejection in the right direction in the drawing (hereinafter referred to as a stop position) to a position corresponding to a cassette loading in the left direction in the drawing (hereinafter referred to as a reproduction position). And the head of the head plate 45 enters the cassette half of the cassette tape C and comes into contact with the magnetic tape, and the pinch roller enters the cassette half and sandwiches the magnetic tape between the capstan shaft and the pinch roller. I do. When ejecting, the head plate 45
Is moved from the reproduction position to the right stop position in the drawing, and the head and the pinch roller are retracted from the inside of the cassette half.

FIG. 1 is a plan view of a part of the mechanism including the cassette eject device 5, and FIG. 3 is an enlarged plan view of a part of the mechanism including the cassette eject device 5.

A drive gear 51 is attached to a drive shaft 6a of the motor 6 of the drive device 7, and a first transmission gear
The large-diameter gear portion 52a is meshed with the first transmission gear 52.
A large-diameter gear portion 53a of the second transmission gear 53 is meshed with the small-diameter gear portion 52b of the second transmission gear 53, and the second transmission gear 53 is formed with a small-diameter gear portion 53b. Then, the second transmission gear 53
Is rotated in the clockwise direction (arrow direction) in the figure by transmitting the rotational force of the motor 6.

The head plate moving device 3 moves the head plate 45 from the stop position (to the right in the drawing than the position shown) to the reproduction position (the position shown in the drawing) when the cassette tape C is loaded, and moves the head plate 45 during the ejection. The head plate is moved from a reproduction position (illustrated position) to a stop position (rightward in the figure from the illustrated position), and has a head plate moving mechanism 61 as shown in FIG.

The head plate moving mechanism 61 has a load arm 62, which is swingably supported on a support shaft 63 as a fulcrum, and connected to the head plate 45 via a load spring 64. On the edge of the load arm 62 facing the second transmission gear 53 on the side opposite to the head plate 45,
A projecting piece 65 protrudes, and a load pin 66 stands upright on the upper surface of the projecting piece 65. The head plate 45 is urged toward a stop position by a head spring (not shown).
In the reproduction position state shown in FIG.
Is rotated clockwise in the figure, and the elasticity of the load spring 64 exceeds the elasticity of the head spring, and the head plate
45 has been moved to the playback position. When the load arm 62 is rotated in the counterclockwise direction in the drawing, the elasticity of the load spring 64 weakens, the elasticity of the head spring exceeds the elasticity of the load spring 64, and the head plate 45 is moved to the stop position. .

A load gear 67 is rotatably supported adjacently between the second transmission gear 53 and the load arm 62.
As shown in FIGS. 1 and 4, a notch 69 is formed in a part of the tooth 68 on the periphery of the load gear 67. Road gear
An annular concave portion 70 is formed on the upper surface of the 67 so that a lock pin 77 of a lock arm 75 to be described later is engaged with the outer peripheral wall of the concave portion 70. Protrusion
An inner protrusion 72 protrudes adjacent to 71, and an inclined surface 73 is formed facing the outer protrusion 71 of the inner protrusion 72. Road gear
As shown in FIG. 4, a cam 74 with which the load pin 66 of the load arm 62 abuts is formed on the lower surface of the 67.

FIG. 4A shows a stop position in which the load arm rotates counterclockwise in FIG. 1 through the load pin 66, and FIG. 4B shows the load arm through the load pin 66. 1 shows a reproduction position state rotated clockwise, the state shown in FIG. 1 shows a position where the load gear 67 returns from the reproduction position to the stop state, and other mechanisms show a state where the reproduction position remains at the reproduction position. I have.

As shown in FIG. 1, a lock arm 75 is swingably supported by a support shaft 76 as a fulcrum adjacent to the load gear 67. A lock pin 77 that engages with the concave portion 70 of the load gear 67 protrudes from one end of the lock arm 75, and an engagement piece 78 that engages with the solenoid 41 protrudes from the other end.

At the tip of the plunger 79 of the solenoid 41, an engagement groove 80 is formed in which the engagement piece 78 of the lock arm 75 is engaged. When the solenoid 41 is excited, the plunger 79 is sucked in the solenoid 41, and when not excited, the plunger 79 is protruded from the solenoid 41 by a built-in spring.

In the state shown in FIG. 1, the solenoid
41 is in a non-excited state. In this state, the lock arm 75 is rotated in the counterclockwise direction, and the lock pin 77 is engaged with the outer projection 71 of the load gear 67, and as shown in FIG. Load arm pressed and engaged with cam 74 of load gear 67
The load pin 62 is moved toward the center of the load gear 67, and the load pin 67 pressing the cam 74 urges the load gear 67 in a counterclockwise direction in the drawing, thereby
The engagement state between the outer projection 71 and the outer projection 71 is maintained. The notch 69 of the load gear 67 faces the gear portion 53b of the second transmission gear 53 to be in a non-meshing state, and the tooth portion 68 on one end side of the notch 69 is engaged with the gear portion 53b of the second transmission gear 53. Being close. FIG. 1 shows a state in which the load arm 62 rotates clockwise in the figure. However, if the load arm 62 corresponds to the position of the load gear 67 shown in the figure, the load arm 62 rotates counterclockwise in the figure. And the head plate 45 is at the stop position.

When the solenoid 41 is excited in the stop position, the lock arm 75 is rotated clockwise in FIG.
The load gear 67 is rotated in the counterclockwise direction in the figure by the load pin 66 that is disengaged from the cam 74 and presses the cam 74.
When the load gear 73 is pressed, the load gear 67 is rotated in the counterclockwise direction in the drawing, whereby the teeth 68 of the load gear 67 mesh with the gear 53b of the second transmission gear 53, and the load gear 67 In response, it is rotated counterclockwise in the figure.
When the load gear 67 is rotated, the load pin 66 is moved out of the load gear 67 through the engagement of the load gear 67 with the cam 74, and the load arm 62 is moved clockwise in the drawing toward the position shown in FIG. As well as the head plate 45
Is moved toward the playback position. Before reaching the position shown in FIG. 4 (b), the load gear 67 is urged in the counterclockwise direction by the load pin 66 pressing the cam 74, and immediately thereafter, the notch 69 of the load gear 67 The engagement with the gear portion 53b of the gear 53 is released, and the load gear 67 is rotated in the counterclockwise direction in the drawing. As shown in FIG. 4B, the inner projection 72 of the load gear 67 contacts the lock pin 77. Then, the rotation of the load gear 67 is stopped, and this state is maintained. In this state, the movement of the head plate 45 to the reproduction position has been completed.

When the solenoid 41 is de-energized in the reproducing position, the lock arm 75 is rotated in the counterclockwise direction in the figure as shown in FIG. The load gear 67, which is disengaged from the inner projection 72 of the load gear 67 and is urged by the load pin 66 pressing the cam 74, is rotated in the counterclockwise direction in FIG. 4 (b), and as shown in FIG. Load gear on lock pin 77
The rotation of the load gear 67 is stopped by the outer projection 71 of the 67 abutting, and the load gear 67 is returned to the stop position. Accordingly, in FIG. 1, the load arm 62 is rotated counterclockwise in the figure, the head plate 45 is moved from the reproduction position to the stop position in the right direction in the figure, and the head and the pinch roller are moved inside the cassette half. Evacuated from

The traveling device 4 reproduces, fast-forwards, and rewinds the magnetic tape of the cassette tape C by rotating the capstan shaft and the reel shaft. As shown in FIG. Gear 4a meshing with gear portion 53b of gear 53
And a mechanism for receiving the rotational force from the motor 6 through the gear 4a to drive the capstan shaft and the reel shaft.

The cassette eject device 5 ejects the cassette tape C by moving the eject lever 31 backward by receiving the rotational force from the motor 6 and ejecting the cassette tape C as shown in FIGS. 1 and 3. Has 81.

The ejection mechanism 81 has a gear arm 82 disposed adjacent to the second transmission gear 53, and one end of the gear arm 82 is swingably supported on a support shaft 83 as a fulcrum.
On one end of the gear arm 82 facing the second transmission gear 53, there is rotatably supported a movable gear 84 that can mesh with the gear portion 53b, and an intermediate gear 85 that meshes with the movable gear 84.
Are rotatably supported. A gear arm spring 86 is mounted on the support shaft 83, and the gear arm 82 is urged in the counterclockwise direction in the figure, and the movable gear 84 is moved to the gear portion 53b by the rotation of the gear arm 82 in the counterclockwise direction in the figure. Be engaged.
At the tip of the gear arm 82, an engaging portion 87 is formed that can be engaged with the head plate 45 that moves to the reproduction position. With this engagement, the gear arm 82 is rotated clockwise in the figure to move the movable gear 84 to the gear. It is separated from the part 53b. Gear arm 82
Is formed with an engagement piece 88 projecting in a direction substantially perpendicular to the distal end side where the engagement portion 87 is formed.

The differential transmission means 90 is connected to the intermediate gear 85. The differential transmission means 90 has a first timing gear 91 and a second timing gear 92.

As shown in FIG. 2, the first timing gear 91 has a large-diameter gear portion 93 meshing with the intermediate gear 85 and a small-diameter gear portion 94 projecting from the upper surface of the gear portion 93. A protruding tooth portion 96 protruding upward in the tooth width direction from one tooth portion 95 of the tooth portions 95 around the gear portion 94 is formed. As shown in FIG. 3, a cam 97 protrudes from a lower surface of the first timing gear 91, and a flat portion 98 is formed on a part of a peripheral surface of the cam 97, and one end of a cam spring 99 is formed on the flat portion 98. Is pressed. The cam spring 99 is a flat part 98 of the cam 97.
In this state, the first timing gear 91 is positioned and held at a predetermined rotation standby position, and returns to the rotation standby position if the rotation angle of the first timing gear 91 is within a predetermined angle. The urging force acts.

On the periphery of the second timing gear 92, the teeth 10
2, the lower side of the tooth portion 100 in the tooth width direction is a small-diameter gear portion 94 of the first timing gear 91, as shown in FIG.
It is possible to mesh with. The first part of the tooth 100
A notch 101 is formed in a non-meshing state with the timing gear 91, and is located at a position adjacent to the tooth 100 on the upstream side in the gear rotation direction (clockwise direction in the drawing) of the notch 101 and at the upper side in the tooth width direction. A tooth receiving portion 102 that can mesh with the convex tooth portion 96 is formed.

A cam 10 is provided on the upper surface of the second timing gear 92.
The eject pin 38a of the eject arm 38 is engaged with the cam 103. Since the eject arm 38 is urged clockwise in FIG. 1 by a spring (not shown), the eject pin 38 a is pressed and engaged with the cam 103. In the engaged state in which the eject pin 38a has pressed the cam 103 and moved to the most central side,
The second timing gear 92 is positioned and held at a predetermined rotation standby position. On the lower surface of the second timing gear 92, a concave cam 104 is formed.

When the first timing gear 91 and the second timing gear 92 are at the rotation standby positions, respectively, the gear portion 94 and the convex tooth portion 96 of the first timing gear 91 are moved to the second timing gear. It is in a non-meshing state facing the notch 101 of the 92. In this state, the gear arm
The movable gear 84 becomes the gear portion of the second transmission gear 53 by the swing of the 82
53b, the torque of the motor 6 is transmitted,
Only the first timing gear 91 is rotated counterclockwise in the figure. After the first timing gear 91 makes substantially one rotation, the convex tooth portion 96 of the first timing gear 91 is engaged with the tooth receiving portion 102 of the second timing gear 92, and the second timing gear 92 is rotated. The notch 101 of the second timing gear 92 which is pushed in the clockwise direction and rotates
Is engaged with the first timing gear 91, the torque of the motor 6 is transmitted, and the second timing gear 92 is rotated clockwise in the drawing. The rotation of the second timing gear 92 in the clockwise direction in FIG.
The eject pin 38a is pushed by 3 and the eject arm
38 rotates counterclockwise in FIG.
Is moved backward.

When the eject arm 38 is rotated in the counterclockwise direction in FIG. 1, the solenoid 41 in the non-excited state is
A lock piece 38b is formed to engage with the plunger 79 to prevent the plunger 79 from moving by suction.

As shown in FIGS. 1 and 3, the first
A switch arm 111 is swingably supported on a support shaft 112 as a fulcrum adjacent to the second timing gears 91 and 92. The switch arm 111 has a first protrusion 114 having a projection 113 which engages with the concave cam 104 of the second timing gear 92, and a counterclockwise direction of the engagement piece 88 of the gear arm 82 in the drawing. A second projection 116 having a projection 115 engageable with the edge, and first and second projections 114,116.
Third protruding pieces 117 projecting in the opposite direction are formed, and are urged in the counterclockwise direction in the figure by a switch arm spring (not shown). The switch arm 111 has a switch actuating piece 118 formed therein.
In response to the swing of 1, the operating portion 120 of the motor drive switch 119 is turned on / off by the switch operating piece portion 118. The third projecting piece 117 is connected to the slide lever 13 via a connecting spring (not shown).

The elasticity of the switch arm spring of the switch arm 111, the gear arm spring 86 of the gear arm 82, and the coupling spring is such that the elasticity of the switch arm spring is high when the slide lever 13 is moving backward. The connection spring is set to have the highest elasticity when the slide lever 13 is moved forward.

The slide lever before loading the cassette
13 is moving backward, the switch arm 111
Is rotated in the counterclockwise direction in the drawing and is at the position shown in FIG.
The engaging piece 88 of the gear arm 82 is pushed by the projection 115 of the projecting piece 116, and the gear arm 82 is rotated clockwise in the drawing. As a result, the operating portion 120 of the motor drive switch 119 is pushed and turned off by the switch operating piece 118, the motor 6 is stopped, and the movable gear 84 is moved from the gear portion 53b of the second transmission gear 53 to the Have been separated.

When the slide lever 13 moves forward when the cassette is loaded, the switch arm 111 is moved via the connecting spring.
Is rotated clockwise in the figure. As a result, the pushing of the operating portion 120 of the motor drive switch 119 is released and turned on, the motor 6 is energized, and the motor 6 is driven to drive the second portion through the drive gear 51 and the first transmission gear 52. Is transmitted. At the same time, the pushing of the gear arm 82 is released and the gear arm 82 is rotated counterclockwise in the drawing, and the movable gear 84 meshes with the gear portion 53b of the second transmission gear 53.

Next, the operation of the present embodiment will be described.

First, in the stopped state before the cassette is loaded, as shown in FIG. 5, the slide lever 13 moves backward against the slide spring 16 and is locked by the lock mechanism. Is raised to
The cassette catcher 18 is urged forward by a toggle spring 20.

As shown in FIG. 1, the solenoid 41 is in a non-excited state. In this state, the lock arm 75 is rotated counterclockwise in FIG. A load arm engaged with the cam 71 of the load gear 67 as shown in FIG.
The load pin 62 is moved toward the center of the load gear 67, and the load pin 67 pressing the cam 74 urges the load gear 67 in a counterclockwise direction in the drawing, thereby
The engagement state between the outer projection 71 and the outer projection 71 is maintained. As shown in FIG. 1, the notch 69 of the load gear 67 is
The gear portion 53b of the second transmission gear 53 is engaged with the gear portion 53b of the second transmission gear 53.
is close to b. The load arm 62 is rotated in the counterclockwise direction in the figure, and the elasticity of the head spring exceeds the elasticity of the load spring 64, so that the head plate 45 is moved to the stop position (the right side in FIG. 1).

Further, since the slide lever 13 has been moved backward, the switch arm 111 is rotated in the counterclockwise direction in the figure to the position shown in FIG. The engagement piece 88 of the gear arm 82 is pushed by the protrusion 115 of 116, and the gear arm 82 is rotated clockwise in the figure,
The movable gear 84 is separated from the gear portion 53b of the second transmission gear 53. Motor drive switch with switch actuation piece 118
Actuator 120 of 119 is pushed and turned off, and motor 6
Is in a stopped state.

Further, the cam spring 99 is engaged with the flat portion 98 of the cam 97, and the first timing gear 91 is positioned and held at a predetermined rotation standby position. The eject pin 38a is the second
The second timing gear 92 is positioned and held at a predetermined rotation standby position in the engaged state in which the cam 103 of the timing gear 92 is pressed and moved to the most central side. Since the first and second timing gears 91 and 92 are at the rotation standby positions, respectively, the gear portion 94 of the first timing gear 91 is provided.
And the convex tooth portion 96 is formed in the notch 101 of the second timing gear 92.
And is in a non-meshing state.

Further, as shown in FIG. 1, the eject arm 38 is rotated clockwise in the figure via an eject pin 38a which engages with the cam 103 of the second timing gear 92 at the rotation standby position. As shown in FIG. 5, the eject lever 31 is located forward by the bias of the eject spring 32, and the safety lever 35 is located forward on the eject lever 31 via the safety spring 36. .

Next, the cassette tape C is loaded.

In FIG. 5, when the cassette tape C is inserted into the cassette holder 11, the cassette catcher 18 is pushed backward by the cassette tape C against the toggle spring 20. When the cassette catcher 18 is pushed to a predetermined position where the elastic deformation of the toggle spring 20 becomes maximum, the toggle spring
The biasing direction of 20 is reversed, and the cassette catcher 18 is pushed rearward. When the cassette catcher 18 is pushed to the predetermined position, the lock of the slide lever 13 by the lock mechanism is released, and the slide lever 13 is moved forward by the slide spring 16 as shown in FIG. The tape C is lowered to the lower loading position. By lowering to the loading position, a pair of reels of the cassette tape C are moved with respect to a pair of reel shafts (not shown) of the traveling device 4 and a pair of capstan shafts (in case of auto-reverse or the like) arranged on the bottom surface of the chassis 1. The cassette half is positioned and inserted, and can be reproduced.

When the slide lever 13 moves forward with the loading of the cassette tape C, the switch arm 111 is rotated clockwise in FIG. 3 via the connecting spring in FIG. As a result, the motor drive switch 119
Of the operating portion 120 is released and turned on, the motor 6 is driven, and the second transmission gear 53 is rotated via the driving gear 51 and the first transmission gear 52. And gear arm
The pressing movement of 82 is released and it turns in the counterclockwise direction in the figure,
The movable gear 84 meshes with the gear portion 53b of the second transmission gear 53.

Further, when the cassette tape C is loaded, the solenoid drive switch is turned on, and in FIG. 1, the solenoid 41 is excited, the lock arm 75 is rotated clockwise in FIG. Outer protrusion of
The load gear 67 is rotated in the counterclockwise direction in the figure by the load pin 66 that is disengaged from the cam 74 and presses the cam 74.
When the load gear 67 is pressed, the load gear 67 is rotated in the counterclockwise direction in the drawing, whereby the teeth 68 of the load gear 67 are meshed with the gear 53b of the rotating second transmission gear 53, and the load gear 67 is rotated.
Is rotated counterclockwise in the figure by receiving the rotation force of the motor 6.

When the load gear 67 rotates, the load gear
Load pin 66 is engaged with load gear via engagement of cam 74 with 67
The load arm 62 is moved outward from the position 67, the load arm 62 is rotated clockwise in the figure toward the position shown in FIG. 1, and the head plate 45 is moved toward the reproduction position. Fig. 4 (b)
The load pin that presses the cam 74 just before reaching the position shown in
66, the load gear 67 is urged in the counterclockwise direction in the figure. Immediately thereafter, the notch 69 of the load gear 67 faces the gear portion 53b of the second transmission gear 53 to disengage the gear. As shown in FIG. 4B, the rotation of the load gear 67 is stopped by the inner projection 72 of the load gear 67 abutting against the lock pin 77, and the load gear 67 is held in this state. In this state, the movement of the head plate 45 to the reproduction position is completed.

When the head plate 45 is moved to the reproducing position, the head of the head plate 45 enters the cassette half of the cassette tape C and comes into contact with the magnetic tape, and the pinch roller enters the cassette half. A magnetic tape is sandwiched between the capstan shaft. Since the capstan shaft and the reel shaft are rotated by the traveling device 4, the magnetic tape travels and reproduction is performed.

Also, as shown in FIG.
While the head plate 45 is moving to the playback position, the head plate 45 is engaged with the engagement portion 87 of the gear arm 82, the gear arm 82 is rotated clockwise in the drawing, and the movable gear 84 is moved to the second transmission gear.
The gear 53 is separated from the gear 53b. At this time, the movable gear 84
While the first timing gear 91 rotates by a predetermined angle while the first timing gear 91 meshes with the gear portion 53b of the second transmission gear 53, the first
By the action of the cam spring 99 pressing the cam 97 of the timing gear 91, the first timing gear 91 is returned to the rotation standby position.

Next, the cassette tape C is ejected.

When an eject button (not shown) is turned on, the solenoid 41 is de-energized. In FIG. 4B, the lock arm 75 is rotated counterclockwise in FIG. The load gear 67, which is disengaged from the inner projection 72 of the load gear 67 and is urged by the load pin 66 pressing the cam 74, is rotated in a counterclockwise direction in FIG. The outer projection 71 of the load gear 67 abuts against the pin 77, the rotation of the load gear 67 is stopped, and the pin 77 is returned to the stop position. Accordingly, in FIG. 1, the load arm 62 is rotated counterclockwise in the figure, the head plate 45 is moved from the reproduction position to the stop position in the right direction in the figure, and the head and the pinch roller are moved inside the cassette half. Evacuated from

In FIG. 1, while the head plate 45 moves to the stop position, the pressing of the gear arm 82 by the head plate 45 is released. At this time, the switch arm 111 is rotated clockwise in the drawing, and the projection 115 is separated from the engagement piece 88 of the gear arm 82, and the gear arm 82
Is allowed, the gear arm 82 is rotated counterclockwise in the figure by the bias of the gear arm spring 86, and the movable gear 84 is meshed with the gear portion 53b of the second transmission gear 53. .

In FIG. 3, when the movable gear 84 is engaged with the gear portion 53b of the second transmission gear 53, the rotational force of the motor 6 is transmitted, and first, only the first timing gear 91 is inverted in the drawing. Rotated clockwise. After the first timing gear 91 makes substantially one rotation, that is, after a lapse of time until the head plate 45 completes the movement from the reproduction position to the stop position, the convex tooth portion 96 of the first timing gear 91 changes to the second timing. The second timing gear 92 is pushed in the clockwise direction in the figure by being engaged with the tooth receiving portion 102 of the gear 92, and the tooth portion adjacent to the notch 101 of the rotating second timing gear 92. 100 is meshed with the first timing gear 91, and the torque of the motor 6 is transmitted to the second timing gear 92.
Is rotated clockwise in the figure.

The rotation of the second timing gear 92 in the clockwise direction in the figure causes the cam 103 to push the eject pin 38a to rotate the eject arm 92 in the counterclockwise direction in FIG. When the eject arm 92 is rotated in the counterclockwise direction in FIG. 1, the lock piece 38b is engaged with the plunger 79 of the solenoid 41 in the non-excited state, and the suction movement of the plunger 79 is prevented. As a result, even if an abnormality occurs and the solenoid 41 is energized during the ejection, the eject operation of the cassette tape C and the transition to the reproducing state are performed simultaneously, and no clogging occurs, and only the eject operation is continued. You.

In FIG. 6, when the eject arm 38 is moved in the counterclockwise direction in the figure, the safety lever 35 is moved backward, and the eject lever 31 is moved backward via the safety spring 36. At this time, the safety spring is placed between the safety lever 35 and the eject lever 31.
By interposing 36, for example, the eject lever
Even in the event of an abnormality where the 31 does not move, the safety spring 36 expands and can absorb excessive force.

When the eject lever 31 is moved backward, the slide lever 13 located forward is moved by the slide spring 16.
The cassette holder 11 is moved rearward against the urging of the cassette holder 11 to the cassette attaching / detaching position, and the slide lever 13 is locked by the lock mechanism at the rearward position. At the same time, the rotating lever 19 is rotated counterclockwise in the figure by the connecting rod 34,
When the toggle spring 20 is rotated to a predetermined position where the elastic deformation is maximum, the biasing direction of the toggle spring 20 is reversed, the cassette catcher 18 is pushed forward, and the cassette holder raised to the cassette attaching / detaching position. The cassette tape C in 11 is pushed forward and ejected.

When the slide lever 13 moves backward, the bias of the switch arm 111 in the clockwise direction in FIG. 3 is weakened in FIG. 3, and the switch arm 111 is moved counterclockwise in FIG. 3 by the bias of the switch arm spring. It is rotated in the rotation direction. At this time, the first protrusion of the switch arm 111
The projection 113 of the second timing gear 92 is held at the center side of the second timing gear 92 by the cam 104 of the second timing gear 92, and the rotation of the switch arm 111 in the counterclockwise direction in the figure is regulated. As a result, the ON state of the motor drive switch 119 is maintained, and the motor 6 is continuously driven until the cassette tape C is reliably ejected without stopping the motor 6 during the ejection of the cassette tape C.

When the second timing gear 92 makes substantially one rotation, the projection 113 of the switch arm 111 is released from being held by the cam 104 of the second timing gear 92 at the center side of the second timing gear 92, and the switch is turned off. The arm 111 is rotated counterclockwise in the figure. As a result, the projection 115 of the second projection 116 of the switch arm 111 causes the gear arm 82 to move.
Is pressed, the gear arm 82 is rotated clockwise in the drawing, the movable gear 84 is separated from the gear portion 53b of the second transmission gear 53, and the switch arm 111 is turned on. Actuating piece 118 actuates motor drive switch 119
120 is pushed and turned off, and the motor 6 is stopped.

Immediately before the rotational force is no longer transmitted to the second timing gear 92, the eject pin 38a engaging with the cam 103 of the second timing gear 92 is moved toward the center of the second timing gear 92. You. Thereby, as shown in FIG. 5, the eject arm 38 is rotated clockwise in the drawing, and the safety lever 35 and the eject lever 31 are returned forward by the safety spring 36 and the eject spring 32.

When the movable gear 84 is separated from the gear portion 53b of the second transmission gear 53, the first timing gear 91 is actuated by the action of the cam spring 99 pressing the cam 97 of the first timing gear 91. Is returned to the rotation standby position, and the eject pin 38a presses the cam 103 of the second timing gear 92 to return the second timing gear 92 to the rotation standby position.

In this way, the ejection is completed, and the operation returns to the above-described stopped state before the cassette is loaded.

As described above, the rotational force from the motor 6 is not transmitted to the eject mechanism 81 until the head plate 45 moves from the reproduction position to the stop position, and the head plate 45 moves to the stop position. Since the differential transmission means 90 for transmitting the rotational force from the motor 6 at the time is provided, even if the movement of the head plate 45 from the reproduction position to the stop position and the ejection operation are started simultaneously at the time of the ejection operation of the solenoid 41, the head The cassette tape C can be reliably ejected at the timing after the plate 45 has been reliably moved from the reproduction position to the stop position, and the eject mechanism 81 does not use a plurality of solenoids for setting the timing as in the related art. Can be set, and can be simplified and downsized.

Further, a first timing gear 91 and a second timing gear 92 are provided as the differential transmission means 90, and when the solenoid 41 is ejected, the rotation force of the motor 6 is received and only the first timing gear 91 is received. Is rotated by a predetermined angle, the first timing gear 91 moves to the second timing gear.
The rotational force is transmitted to 92, the cassette tape C can be ejected, and the differential transmission means 90 can be constituted by a simple gear mechanism.

Further, by providing such a cassette ejecting device 5, the ejecting operation can be performed by using the motor 6 which is common to the head plate moving device 3 and the traveling device 4, thereby simplifying and downsizing.

It is to be noted that the cassette tape player of the present invention includes not only reproduction but also reproduction / recording and recording.

[0084]

According to the first aspect of the present invention, the rotational force from the motor is not transmitted to the eject mechanism until the head plate moves to the position corresponding to the eject, and the head plate is adapted to the eject mechanism. Since the differential transmission means that transmits the rotational force from the motor at the time of moving to the position is provided, even if the movement of the head plate to the position corresponding to the ejection and the ejecting operation are started simultaneously at the time of the ejecting operation of the solenoid, the head plate is kept at the same position. The cassette can be reliably ejected at the timing after it is securely moved to the eject-compatible position, and the timing can be set in the eject mechanism without using multiple solenoids for timing setting as in the past, which is simple and compact. Can be

According to the cassette ejecting device of the second aspect, in addition to the effect of the cassette ejecting device of the first aspect, the first and second timing gears are provided as differential transmission means, and the solenoid is provided. When the ejecting operation is performed, only the first timing gear rotates by a predetermined angle due to the rotational force of the motor, and then the rotational force is transmitted from the first timing gear to the second timing gear to eject the cassette. The differential transmission means can be constituted by a simple gear mechanism.

According to the cassette tape player of the third aspect, by providing the cassette ejecting device of the first or second aspect, the ejecting operation can be performed using a motor common to the head plate moving device and the traveling device. , Can be simplified and miniaturized.

[Brief description of the drawings]

FIG. 1 is a plan view of a part of a mechanism including a cassette ejecting device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a first timing gear and a second timing gear of the differential transmission unit according to the embodiment.

FIG. 3 is an enlarged plan view of a part of the mechanism including the cassette eject device of the embodiment.

FIG. 4 is a plan view of the load gear according to the embodiment;
(a) shows the state at the stop position, and (b) shows the state at the reproduction position.

FIG. 5 is a perspective view of the cassette tape player according to the embodiment before the cassette is loaded;

FIG. 6 is a perspective view of the cassette tape player according to the first embodiment in a cassette loaded state.

[Explanation of symbols]

 2 Cassette loading device 3 Head plate moving device 4 Traveling device 5 Cassette eject device 6 Motor 41 solenoid 45 Head plate 61 Head plate moving mechanism 81 Eject mechanism 90 Differential transmission means 91 First timing gear 92 Second timing gear 95 teeth Part 96 convex tooth part 100 tooth part 101 notch part 102 tooth receiving part

Claims (3)

(57) [Claims] When a cassette in a loaded state is ejected, a head plate having a head is moved from a cassette loaded position to an ejected position, and the cassette is ejected by a rotating force of a motor. A solenoid operated by the solenoid, a head plate moving mechanism for moving the head plate from a cassette loading position to an eject position when the solenoid is ejected, and a rotational force from the motor when the solenoid is ejected. An eject mechanism for ejecting the cassette; and an eject mechanism provided in the eject mechanism, wherein when the solenoid is ejected, the motor is rotated by the motor until the head plate moves to an eject corresponding position. Cassette ejecting apparatus characterized by head plate is provided with a differential transmission unit for transmitting a rotational force from the motor at the time of the move to the eject position corresponding with the non-transmit forces. 2. The differential transmission means includes: a first timing gear that rotates by receiving a rotational force of a motor; and a second timing gear that rotates while one end of the tooth width direction meshes with the first timing gear. The first timing gear has one of the surrounding teeth.
A protruding tooth portion protruding from the other tooth portion to the other end side in the tooth width direction is provided, and the second timing gear is disengaged from the first timing gear at a part of a peripheral tooth portion; A notch portion is provided, and a tooth receiving portion is provided at a position adjacent to the tooth portion on the upstream side in the gear rotation direction of the notch portion and at the other end side in the tooth width direction so as to be able to mesh with the convex tooth portion. 2. The cassette eject device according to claim 1, wherein: 3. A cassette loading device for loading a cassette tape into a predetermined cassette loading position, a head plate moving device for moving a head plate having a head from an eject position to a cassette loading position when the cassette tape is loaded, A running device for running the tape of the cassette tape, a cassette ejecting device according to claim 1 or 2, and a common motor that applies a rotational force to the head plate moving device, the running device, and the cassette ejecting device. A cassette tape player, characterized in that: