JPH0722750Y2 - Cassette deck loading mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview] In a cassette deck, when a cassette tape is inserted and ejected, a cassette gear is pulled in and pushed out by connecting a drive gear portion to an insertion / ejection gear portion.
The drive gear is always connected to the insertion / ejection gear by providing a protrusion on the drive gear and providing a groove on the insertion / ejection gear that faces the projection in conjunction with the insertion / ejection gear to guide the projection. The timing can be constant.

[Industrial application field]

The present invention relates to a cassette deck loading mechanism for automatically inserting and ejecting a cassette tape in a cassette deck.

[Conventional technology]

2. Description of the Related Art Conventionally, there is a cassette deck loading mechanism that inserts and ejects a cassette tape in a cassette deck by driving a motor. In detail, in the case of insertion, the drive gear is caused to jump into the insertion / ejection gear linked to the motor, so that the arm portion connected to the drive gear draws the cassette tape into the cassette deck. When the drawing is completed, the drive gear is disconnected from the insertion / ejection gear, and the cassette tape is lowered to a predetermined position, for example, by a cam integrated with the insertion / ejection gear. On the contrary, when ejecting, by rotating the motor in the reverse direction, the insertion / ejection gear and the cam rotate in the reverse direction to raise the cassette tape from a predetermined position, for example. Further, the notched gear is once connected to the drive gear separated from the notched gear, so that the arm portion pushes out the cassette tape.

[Problems to be solved by the device]

In the above-mentioned cassette deck loading mechanism, when a deformed cassette tape or a cassette tape having a nonstandard size is used, the arm portion does not completely pull in the cassette tape but stops halfway, and the drive gear also stops rotating. As a result, since the insertion / ejection gear rotates in connection with the drive gear, the connection timing between the drive gear and the insertion / ejection gear is deviated, and then the connection timing does not return to the original state, and the cassette tape is properly There is a problem that it cannot be inserted into the cassette deck.

The present invention has been made to solve the above-mentioned problems, and a cassette deck capable of correctly inserting and ejecting a cassette tape into and from the cassette deck without shifting the connection timing of the drive gear and the insertion / ejection gear. It is intended to provide a loading mechanism.

[Means for Solving the Problems]

FIG. 1 is a view showing the principle configuration of a loading mechanism for a cassette deck according to the present invention. In the figure, reference numeral 1 is a drive gear portion, which pulls in and pushes out the cassette tape 6 at the time of insertion and ejection through the arm portion 5. Reference numeral 2 denotes an insertion / ejection gear portion, which works in conjunction with the motor M to insert and eject the cassette tape 6. Reference numeral 3 denotes a protrusion, which is provided on the drive gear unit 1. Reference numeral 4 denotes a guide groove, which is provided on the insertion / ejection gear portion 2 so as to face the projection portion 3 and guides the projection portion 3 in conjunction with the insertion / ejection gear portion 2.

[Action]

According to the present invention, the projection 3 provided on the drive gear portion 1 is guided along the guide groove 4 provided on the insertion / ejection gear portion 2 so that the connection timing between the drive gear portion 1 and the insertion / ejection gear portion 2 is increased. Is always constant.

In detail, when inserting, the drive gear unit 1 is driven by the drive of the motor M via the insertion / ejection gear unit 2, and the arm unit 5 interlocked with the drive gear unit 1 starts drawing in the cassette tape 6. At this time, the protrusion 3 provided on the drive gear portion 1 is guided along the guide groove 4 of the insertion / ejection gear portion 2. When the pulling-in is completed, the connection between the drive gear portion 1 and the insertion / ejection gear portion 2 is released, but the protrusion portion 3 is in the state of being guided by the guide groove 4. That is, the protrusion 3 is guided by the guide groove 4 as the insertion / ejection guide 2 is driven. When the cassette tape 6 is set at a predetermined position, the motor M stops driving,
The protrusion 3 contacts one side wall of the guide groove 4.

When ejecting, the cassette tape 6 is removed from the predetermined position by the insertion / ejection gear section 2 by driving the motor M in the opposite direction to the case of insertion. At this time, the protrusion 3 is formed in the guide groove 4
Is guided in the opposite direction to the abutting direction. After the removal, since the protrusion 3 and the insertion / ejection gear 2 are connected via the guide groove 4, the drive gear 1 and the insertion / ejection gear 2 are connected at a predetermined timing. The drive gear unit 1 is driven via the insertion / ejection gear unit 2, and the cassette tape 6 is pushed out from the cassette deck via the arm unit 5. At this time, the protrusion 3 contacts the other side wall of the guide groove 4.

As a result, the drive gear portion 1 and the insertion / ejection gear portion 2 are temporarily separated from each other, but since the protrusion 3 is connected to the insertion / ejection gear portion 2 by the guide groove 4, the drive gear portion is re-connected. The connection timing of the part 1 and the insertion / ejection gear part 2 can be made constant.

〔Example〕

FIG. 2 is a plan view showing an embodiment of the present invention.
In this figure, the drive gear unit 1 is composed of a fan-shaped drive gear 10, and a cylindrical projection 30 is provided on a part of the back surface of the drive gear 10. The insertion / ejection gear unit 2 includes a drive gear 20 and a notch gear 21, and the drive gear 20 is driven by a motor M via a first interlocking gear 73 and a second interlocking gear 80. Further, the surface of the drive gear 20 is provided with a long groove 40 that guides the protrusion 30 of the drive gear 10 following the drive of the drive gear 20. The long groove 40 includes a deformed portion obtained by deforming a circle and a circular portion. The notch gear 21 has a semicircular shape, is fixed to the surface of the drive gear 20, and is driven together with the drive gear 20. Further, the notch gear 21 is connected to the drive gear 10 according to the inserting and ejecting operations of the cassette tape 6. The arm portion 5 is composed of an arm member 50 and a slide member 51. One end of the arm member 50 is connected to the drive gear 10 via a support 55 and rotates in conjunction with the drive gear 10. A lever 72 that rotates in conjunction with the arm member 50 is attached to the support column 55, and engages with a switch lever 71a to turn the switch 71 on and off to control the driving of the motor M. Arm member
A slide hole 53 is provided at the other end of the slide member 50, and the pin 54 fixed to the slide member 51 is slid along the long hole 81 provided on the surface of the pedestal 78 that supports the cassette tape 6 so that the slide member 51 is removed. Reciprocates. A claw 52 is provided at one end of the slide member 51, and the claw 52 is used for the reel hole 60 of the cassette tape 6.
And the cassette tape 6 is pulled in and pushed out. Further, when the other end of the slide member 51 hits the hook member 74 during insertion, the hook 77 of the hook member is disengaged from the fixed base 79 of the cassette deck, and the receiving base 78 is attached to the drive gear 20 (not shown). ) To descend. In addition,
On the contrary, at the time of discharging, when the pedestal 78 rises and the other end of the slide member 51 separates from the hook member 74, the hook 77 of the hook member hangs on the fixed base 79 of the cassette deck, and the pedestal 78 is fixed. It is fixed to the base 79.

In the above configuration, the drive gear 10 and the notch gear 21 are shown in FIG. 3 based on the cassette tape insertion and ejection operations.
The timing of connection with and will be described below. Cassette tape 6
Before the insertion, the connection between the drive gear 10 and the notch gear 21 is in the state of FIG. 3 (a), and the projection 30 is in contact with one end of the long groove 40. Next, when the cassette tape 6 is lightly pushed into the cradle 78 by, for example, a finger, the claw 52 of the slide member 51 is caught in the reel hole 60 of the cassette tape 6, and the slide member 51 is pushed inward. As a result, the arm member 50 rotates and the lever 72 turns on the switch 71 via the switch lever 71a, whereby the motor M starts to be driven. By driving the drive gear 20 through the first interlocking gear 73 and the second interlocking gear 80 by driving the motor M,
The drive gear 10 is driven via the notch gear 21. As a result, the arm member 50 slides the slide member 51 inward along the long groove 81, whereby the cassette tape 6 is drawn. At this time, the protrusion 30 is moved along the deformed portion of the long groove 40. When the other end of the slide member 51 comes into contact with the hook switch and reaches the predetermined position of the pedestal 78, the notch gear
21 is disengaged from the drive gear 10. At this time, the protrusion 30
Is located almost at the boundary between the deformed portion and the circular portion in the long groove 40 (state (b) in FIG. 3). At the same time, the claw 77 of the hook member 74 is disengaged from the fixed base 79, and the receiving base 78 begins to descend to a predetermined position. As a result, the drive gear 10 becomes the notch gear 21.
The protrusion 30 is guided along the circular portion of the long groove 40 because it is stopped because it is disconnected from the protrusion 30. When the pedestal 78 finishes descending to the predetermined position, that is, when the cassette tape 6 is set to the predetermined position, the motor M stops driving. At this time, the protrusion 30 contacts the end of the circular portion of the long groove 40 (state (c) in FIG. 3). This completes the insertion of the cassette tape 6.

Next, when the cassette tape 6 is inserted, the motor M is driven in the opposite direction to that at the time of insertion (this is performed by an eject button (not shown)).
The cradle 78 begins to rise. At this time, the projection 30 is guided from the end of the circular portion of the long groove 40 in the direction opposite to that at the time of insertion (third part).
((C) state of the figure). After the pedestal 78 has finished rising, the drive gear 10
When the notch gear 21 and the notch gear 21 are coupled (at this time, the protrusion 30 is substantially at the boundary between the deformed portion and the circular portion in the long groove 40 as shown in the state (b) of FIG. 3), the arm member 50 is By pushing out the slide member 51, the claw 77 of the hook member 74 is hooked on the fixed base 79, and the receiving base 78 is fixed to the fixed base 79. As a result, the protrusion 30 starts to move while being guided by the deformed portion of the long groove 40. With the rotation of the arm member 50, the lever 72 moves the switch 71 via the switch lever 71a.
When is turned off, the motor M is stopped and the cassette tape 6 is pushed out from the receiving base 78. At this time, the protrusion 30 is a long groove.
It contacts the end of the deformed portion of 40 (state (a) of FIG. 3). As a result, the cassette tape 6 is ejected.

By this, when the drive gear 10 is disengaged from the connection of the notch gear 21 at the time of insertion and is connected to the notch gear 21 again at the time of discharging, the connection timing of the drive gear 10 and the notch gear 21 can be always constant. .

Although the protrusion 30 is provided at the position shown in FIG. 2 on the back surface of the drive gear 10, the position at which the protrusion 30 is provided is not limited to this, and it may be provided at any position on the back surface of the insertion / ejection gear 10. Along with this, the long groove 40 provided on the surface of the drive gear 20
Shape also changes. Further, in FIG. 2, reference numeral 76 is a spring, and by applying a load to the slide member 51, a drive gear is provided.
It plays a role in maintaining balance with 10 drives. In addition, 90
Is a recording / reproducing motor, which is used for recording and reproducing after the cassette tape 6 is inserted at a predetermined position.
Run the tape.

[Effect of device]

As described above, according to the present invention, by providing the drive gear portion with the protrusion and the insertion / ejection gear portion with the guide groove for guiding the protrusion, the drive gear and the insertion / ejection gear are inserted when the cassette tape is inserted. When and when the cassette tape is ejected and the cassette tape is ejected and a deformed cassette tape or a cassette tape with a non-standard outer dimension is used, the insertion / ejection gear section will not work against the drive gear section. A loading mechanism for the cassette deck is realized in which the connection timing does not shift due to rotation of the cassette deck and is always constant.

[Brief description of drawings]

FIG. 1 is a diagram showing the principle configuration of a loading mechanism of a cassette deck according to the present invention, FIG. 2 is a plan view showing an embodiment of the present invention, and FIG. 3 is a diagram explaining the operation of FIG. . 1 ... Drive gear part, 2 ... Insertion / ejection gear part, 3 ... Projection part,
4 ... Guide groove, 5 ... Arm part, 6 ... Cassette tape, M ... Motor.

Claims (1)

[Scope of utility model registration request] 1. A motor, an insertion / ejection gear connected to the motor through a reduction mechanism, and a cutout gear coaxially and integrally arranged with the insertion / ejection gear and having a fitting portion formed in a predetermined range. A drive gear that fits into the fitting portion of the cutout gear; and a drive gear that fits the fitting portion of the cutout gear while the drive gear fits into the fitting portion of the cutout gear. And a protrusion provided on the drive gear, which moves to the position of the notch gear and further moves the cassette from the retracted completion position to the operating position after the engagement with the fitting portion of the cutout gear is released. And a cassette deck loading mechanism provided with the cassette ejecting mechanism corresponding to a movement between a retracting start position and a retracting completion position of the cassette retracting and ejecting mechanism. A first guide groove for guiding the protrusion to forcibly fit the fitting portion of the cutout gear and the drive gear when the pull-in / pull-out mechanism is near the pull-in start position or near the pull-in completion position. The protrusion / ejection mechanism of the cassette is provided in correspondence with the movement between the pull-in completion position and the operating position, and the protrusion is provided when the pull-in / discharge mechanism of the cassette moves between the pull-in completion position and the operating position. A cassette deck loading mechanism having a long groove formed by a second guide groove continuous with the first guide groove for guiding and preventing rotational movement of the drive gear.