JPH0650848Y2 - Loading / eject mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a mechanism for loading and ejecting a cassette in a tape player.

[Outline of the Invention] The present invention is such that the cassette at the time of loading is moved by spring elasticity in the entire movement process.

[Prior Art] Conventionally, as a cassette loading / ejecting mechanism of a tape player, a loading / ejecting mechanism using a torsion type reversing spring as shown in FIG. 10 is known.

That is, in the figure, 50 is a loading plate, 51 is a power gear for moving the loading plate, 52 is a return spring, 53 is a loading link, 54 is a torsion spring provided on the loading link, 55 is a pack stopper, and 56 is a pack stopper. The pack guide of the cassette, 53a is an engaging hole provided in the loading link 53, 50a is a pin on the loading plate 50 inserted therein, and 53b is a loading link 53 for supporting the winding portion of the spring 54.
The upper protrusion 53c is an engaging piece on the loading link side that engages with one spring portion of the torsion spring 54,
55a is an engaging pin provided on the pack stopper, which passes through an opening 53d formed in the loading link 53, and the pin is opened by the other spring portion of the torsion spring 54.
When the loading plate 50 is pressed against the edge 53e of d, and the loading plate 50 is moved in the arrow direction G in the loading operation of the cassette (the movement completion state in FIG. 10), the loading link 53 is moved clockwise (the tenth direction). (In the figure), and by the torsion spring 54,
The pack stopper 55 is moved in the direction of the arrow H so that the cassette (not shown) inserted in the pack guide 56 is pulled into the loading mounting position at the inner part thereof.

[Problems to be solved by the invention] In the upper loading / ejection mechanism, the movement of the pack stopper 55 is restricted by the guide arm or the end of the chassis, and the loading link 53 is added to absorb the mechanical error. Move it and do this by over pushing the push-up torsion spring 54,
Although the moving position of the cassette is ensured, if the cassette is caught during loading, the pack stopper stops and the loading link moves against the torsion spring 54. However, the engagement pin 55a has the opening 5
After contacting the edge 54f of the 3d, the loading link 53
Is forcibly stopped, and there is a mechanical disadvantage that the drive motor (not shown) of the power gear 50 is forcibly stopped.

Further, since the mounting position of the torsion spring 54 is at the engaging portion of the loading link 53 and the pack stopper 55 (the upper surface of the pack guide 56), it is difficult to make the entire mechanism thin.

[Object of the Invention] The present invention can protect the loading mechanism safely even if the cassette is held during the motor-driven loading operation, and the mechanical error absorption at the movement completion position at the time of loading is prevented by the spring. The main purpose is to provide a loading / ejecting mechanism that can be reliably performed.

Further, another object of the present invention is to obtain a loading and ejecting mechanism which can make the entire mechanism thin.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a pack guide for movably supporting an inserted cassette and a bag for retracting the cassette inserted in the pack guide to a loading completion position. A stopper, a loading / ejecting plate that moves in association with a loading operation, a link member that rotates by the loading / ejecting plate, a moving member that moves by the link member, and a rotation fulcrum, one end of which is provided. The above problem is solved by a configuration including a lever member that is linked to the pack stopper and has the other end linked to the moving member via a spring.

[Operation] In the loading / ejecting mechanism having the above configuration,
The movement of the moving member during the loading operation is sequentially transmitted to the lever member and the pack stopper via the spring, and the cassette is pulled to the loading position by the pack stopper. That is, since the cassette at the time of loading is moved by spring elasticity in the entire movement process, if the cassette is held during motor-driven loading, it is absorbed as the displacement of the spring.

[Embodiment] FIGS. 1 to 8 show an embodiment of the present invention.

In the figure, 1 is a chassis and 2 is a head plate arranged on the front side of the chassis.
Is formed into a substantially L shape by a plate portion 2a supporting the head 3 and a plate portion 2b bent at a right angle from one end thereof, and a guide hole 2c provided at a required portion thereof and a chassis side inserted therein. It can be moved in the mode switching direction indicated by the arrow PQ by the pin 1a of the
Biased in the direction. A roller 6 is provided at the tip of the plate portion 2b at the tip of a shaft 5 which penetrates the chassis 1 and projects to the rear surface for the purpose of being described later.

On the back side of the chassis 1, a plate-shaped mode plate 7 is moved in a direction perpendicular to the moving direction PQ of the head plate 2 by, for example, a motor (not shown) capable of moving the head plate 2 forward and backward. It is movably installed on AB. Reference numeral 2d is a guide hole provided in the chassis 1 for guiding the movement of the mode plate 7, and 7a and 7b are pins on the mode plate side inserted therein.

The mode plate 7 has a cam portion corresponding to the fast-forward mode on one outer edge parallel to the moving direction AB.
The cam portion ST corresponding to the FF and stop modes is formed stepwise, and the roller 6 provided at the tip of the plate portion 2b of the head plate 1 is engaged with the stepped cam portion FF, ST of the mode plate 7. The head plate 1 is attached so that the head plate 1 moves in the direction of the arrow P as the mode plate 7 moves.
By moving in the direction of Q, the mode of the head can be switched.

In the illustrated example, the mode plate 7 moves in the direction of the arrow A, the roller 6 on the head plate side is disengaged from the mode plate 7, and the shaft 5 comes into contact with the end of the guide hole on the chassis side. The position you have done is the play mode position.

A toothed portion 7c is formed on the edge of the mode plate 7 on the side opposite to the stepped cam portion FF-ST, and the reduction gears 8 and 9 driven by the motor M provided in the chassis 1 are formed on the toothed portion 7c. ,Ten
The output gear (FIG. 3), that is, the power gear 10 is meshed.

A frame 11 is provided on the chassis 1, and a loading / ejecting plate 12 movable in the same direction as the mode plate 7 on the back side of the chassis is arranged in parallel to a rising plate 11a forming the frame. That is, the lower side stopper piece 12b on the plate 12 side is pushed by the urging force of the spring 13 applied between the pin 7b on the mode plate 7 side protruding from the guide hole 2d of the chassis 1 and the lower side protrusion 12a of the plate 12. The plate 12 is integrated with the mode plate 7 by pressing and holding the pin 7b. The guide holes 11b and 11c provided in the rising plate 11a and the pins 12c and 12d on the plate 12 side, which are inserted into the guide holes 11b and 11c, guide the sliding of the plate 12. The plate 12 is provided with a kerf-shaped cam portion 12e for the purpose described later.

On the other hand, between the rising plate 11a and the plate 12 of the frame 11, there is provided a link member 14 which is swingably supported by the rising plate 11a by a support shaft 14d. The link member 14 has a forked portion 14a, a protruding shaft portion 14b, and a protruding piece portion 14c.
4b engages with the grooved cam portion 12e of the plate 12, and the cam action causes the link member 14 to swing.

On the plate surface of the receiving plate 11d bent at a right angle from the rising plate 11a of the frame 11, a plate-shaped moving member 15 is provided slidably in the same direction as the loading / ejecting plate 12. The guide holes 15a and 15b provided in the moving member 15 and the pins 11e and 11f on the receiving plate 11d side inserted into the guide holes 15a and 15b guide the sliding of the moving member.

The moving member 15 has spring retaining projections 15c and 15d and stopper protruding pieces 15e at required positions, and the spring retaining projection 15c is inserted into the forked portion 14a of the link member 14. And the projecting piece provided on the side of the projecting piece 15d and the receiving plate 11d.
A return spring 16 for the moving member 15 is stretched over 11g.

A guide arm 19 that supports a U-shaped pack guide 18 between the rising plate 11a of the frame 11 and the rising plate 17a of another frame 17 that faces the frame 11 at a distance from the rising plate 11a.
Is rotatably supported. That is, 19a and 19b are sleeve plates on the guide arm side, and 19c and 19d are support shafts respectively provided on the sleeve plates, and these 19c and 19d are inserted and supported by the rising plates 11a and 17a to serve as pivot points. ing.

A protruding shaft 19e is provided at the tip of the sleeve plate 19a, and the protruding shaft 19e passes through the cutout portion 11h of the rising plate 11a to load the loading plate.
It is engaged with a cam member 12f on the outer edge of the eject plate 12. In addition, the sleeve plate 19a has a protruding piece 19f, and a guide arm is provided by a spring 20 hung between the tip of the protruding piece 19f protruding through the opening 11i of the rising plate 11a and the chassis 1 side.
The projecting shaft 19 is provided with an urging force for rotating 19 downward.
The e is pressed against the cam portion 12f of the plate 12.

The guide arm 19 is provided with a guide groove 19g that passes in the cassette insertion direction of the pack guide 18, and the guide groove 19g
The lever member 22 is attached to the pack stopper 21
One end of is freely connected. That is, the pin 21a provided on the pack stopper 21 is inserted into the guide hole 22a on the lever member 22 side. The other end of the lever member 22 is inserted between the receiving plate 11d and the moving member 15 and is connected so as to be rotatable about the receiving plate side pin 11f as a rotation fulcrum.
A spring 23 is stretched between an end portion projecting to the outside of 15 and a projecting piece 15c of the moving member 15.

The pack guide 18 is flexibly connected to and held by a guide arm 19, and when the guide arm 19 is rotated about the support shafts 19c, 19 as a fulcrum, it is pushed and lowered.

Next, the operation and operation of the loading / ejection mechanism will be described.

(1) As shown in FIGS. 6A and 6B, the pack guide
When the cassette 24 is inserted into the 18 until its tip hits the stopper plate 21b of the pack stopper 21 (see FIG. 6C), the engaging element 21c of the pack stopper 21 engages with the hub hole (not shown) on the cassette side. Are combined.

(2) When the cassette is slightly pushed in from the above insertion position,
The pack stopper 21 is pushed in the direction of arrow C, and the lever member 22 rotates in the direction of arrow D with the pin 11f as a fulcrum, so that the end of the lever member 22 contacts the moving member 15 and the moving member 15 moves in the arrow direction. Move in the direction of E.

(3) By the movement of the moving member 15, the link member 14 linked to the projecting piece 15c is rotated clockwise about the support shaft 14d as a fulcrum in FIG. 2, and the projecting piece member 14c is loaded by the loading switch ( (Not shown), the motor M is started.

The movement of the moving member 15 is stopped when the projecting piece 15e of the moving member 15 engages with the stepped portion 12g of the loading / ejecting plate 12, but when the motor M is started, the plate 12 is moved by the arrow F.
Since it moves in the direction of, the restraining action is released.

(4) That is, when the motor M is started,
As described with reference to the drawings, the mode plate 7 is moved in the direction of arrow A by the power gear 10. However, since the loading / eject plate 12 is connected to the mode plate 7, the plate 12 is moved in the direction of arrow F. Moving.

(5) When the plate 12 moves in the direction of the arrow F, the link member 14 engaged with the trough of the kerf-shaped cam portion 12e.
Since the protruding shaft portion 14b moves along the ascending slope of the cam portion 12e, the link member 14 also continues to rotate in the clockwise direction (see FIG. 2), and the moving portion 15 associated therewith further has the arrow E. , And at the same time, the lever member 22 also rotates in the direction of arrow D, and the pack stopper 21 horizontally pulls in the cassette 24.

(6) FIGS. 7A and 7B show a state where the cassette 24 is completely drawn.

When the cassette is completely pulled in, the protruding shaft of the link member 14
14b rides on the mountain portion of the cam portion 12e of the plate 12,
Since the rotation of the link member 14 stops, the movement of the moving member 15 also stops.

When the cassette is completely pulled in, the guide arm 19
The protruding shaft 19e of the sleeve plate 19a is at the tip of the horizontal mountain portion of the cam portion 12f at the outer edge of the plate 12 (see FIG. 7B).

(7) FIGS. 8A and 8B show a state in which the cassette 24 is lowered after the cassette 24 is pulled in.

Even if the movement of the moving portion 15 is stopped, the loading / ejecting plate 12 is continuously moved in the direction of the arrow F by the driving of the motor M, so that the guide supported on the plate 12 by the horizontal mountain portion of the cam portion 12f. The protruding shaft 19e of the arm 19 on the sleeve plate 19a side is removed from the horizontal mountain portion and is guided along the downward slope of the cam portion 12f by the biasing force of the spring 20 (see FIG. 1), while being guided. Rotates in the clockwise direction (FIG. 8B) about the support shaft 19c as a fulcrum, so that the pack guide 18 supported thereby descends with the cassette 24 supported, as shown in FIG. 8B.

The protruding shaft 19e of the sleeve plate 19a removed from the descending slope of the cam portion 12f of the plate 12 is the frame rising plate 11 as it is.
It is received by the notch 11h of a.

(8) When the cassette 24 is lowered by the pack guide 18, the mode plate 7 described above is in the stop mode position shown in FIG.
When it is moved to the direction of arrow A by 10 and set to the play position, a detection switch (not shown) is turned on, and the movement of the mode plate 7 is stopped by stopping the motor M.

During the movement of the mode plate 8 after the cassette is lowered, the loading / ejecting plate 12 moves only in the direction of the arrow F together with the mode plate 7, and does not affect other parts.

(9) Next, when ejecting the cassette,
Turn on the eject switch (not shown),
The motor M is driven in reverse.

When the motor is driven in the reverse direction, the operation reverse to that at the time of loading described above is performed, and each member is returned from the state shown in FIGS. 8A and 8B to the state shown in FIGS. 6A and 6B.

According to the loading / ejecting mechanism having the above-described configuration, even if the cassette is held by hand during the loading operation, the spring 23 only extends and the loading operation is continued, without affecting other members.

Further, when the horizontal movement of the cassette in the loading operation is completed, the moving member 15 is additionally moved, whereby the spring 23 can surely move the cassette to a predetermined position.

That is, the spring 23 serves both as a protection mechanism when the cassette is held during the loading operation and as an over push mechanism for moving the cassette horizontally.

On the other hand, according to the mechanism, it is safe even if the cassette is caught at the time of ejecting. That is, the moving member 15 is a spring
Since it is biased by 16 and is pulled in the direction opposite to the arrow E in FIG. 6A, the link member 14 is
When force is applied so that b comes into contact with the cam portion 12e of the plate 12 and the cassette is caught at the time of ejection, the link member 14 is stopped and the plate 12 moves, but
Since the link member 14 does not rotate, no load is applied to the rotation of the motor.

Further, according to the above configuration, since only the lever member 22 is placed on the guide arm 19 and the spring 23 that operates it is positioned beside the guide arm 19, it is possible to make the loading / ejection mechanism thin. .

FIG. 9 shows another embodiment of the present invention,
The same or similar members as those described above are designated by the same reference numerals. That is, 12 is a loading eject plate, 10
Is a power gear meshed with the tooth profile of the plate, 22 is a lever member, 15 is a moving member, and the lever member 22 and the moving member
15 is rotatably supported by another member (not shown) on a shaft 25, and the lever member 22 and the moving member 15 are supported by a spring 23 hung between the lever member 22 and the moving member 15. Is applied to the stopper on the moving member 15 side.
The pin 26 provided on the moving member 15 is inserted and inserted into the guide hole 12g of the loading / ejecting plate 12, and the return spring 16 is attached to the tip of the lever member 15. One end is attached.

In the mechanism of the above embodiment, when the loading / ejecting plate 12 moves in the direction of the arrow during the loading operation, the moving member 15 causes the pin 26 and the guide hole 12 on the plate side.
It rotates counterclockwise by the engagement with g, and the lever member 22 linked to it via the spring 23 rotates counterclockwise, so that the cassette linked to the lever member 22 (shown in the figure). Not available). Even if the cassette is held by hand at the time of loading, the loading operation can be continued only by extending the spring 23, as in the above-described embodiment, and there is no influence of other members.

[Advantage of the Invention] As described above, according to the present invention, even if the cassette is held during the motor-driven loading operation, the loading mechanism can be safely protected and the movement completion position at the time of loading can be achieved. The cassette can be reliably moved to the loading position by absorbing the mechanical error of.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view of a loading / ejection mechanism showing an embodiment of the present invention, FIG. 2 is an exploded perspective view, and FIG.
Fig. 4 is a plan view of the mode switching mechanism, Fig. 4 is a side view showing the assembled state of the loading eject plate and the mode plate, Fig. 5 is a plan view, and Fig. 6A is a plan view of the loading mechanism when the cassette is inserted. Fig. 6B is its side view, Fig. 6C is a side view of the pack stopper, Fig. 7A is a side view of the loading mechanism portion when the cassette is retracted, Fig. 7B is its side view, and Fig. 8A is when the cassette is lowered. FIG. 8B is a side view of the loading mechanism portion of FIG. 9, FIG. 9 is a plan view of the main portion of the loading / ejecting mechanism showing another embodiment, and FIG. 10 is a plan view of the conventional loading / ejecting mechanism portion. It is a figure. 1 ... Chassis, 2 ... Head plate, 3 ... Head, 4 ... Spring, 7 ... Mode plate, 10 ...
Power gear, 11 …… frame, 12 …… loading eject plate, 13 …… spring, 14 …… link member, 15 …… moving member, 16 …… spring, 17 …… frame, 18 …… pack guide, 19… … Guide arm, 20 ……
Spring, 21 …… Pack stopper, 22 …… Lever member, 24 …… Cassette.

Claims (1)

[Scope of utility model registration request] 1. A pack guide for movably supporting an inserted cassette, a pack stopper for pulling the cassette inserted in the pack guide to a loading completion position, and a loading eject for moving in association with a loading operation. A plate, a link member that is rotated by the loading / eject plate, a moving member that is moved by the link member, and a rotation fulcrum, one end of which is linked to the pack stopper and the other end of which is connected via a spring. A loading / ejection mechanism comprising: a lever member linked to the moving member.