JPH073486Y2 - Disc guide mechanism of disc player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] In a CD disc deck or the like, a guide pin for receiving the inserted disc inside the apparatus, a first slide lever movable in the disc insertion direction, and a guide for the inserted disc A stopper for stopping the first slide lever at a position on the inner side of the position hitting the pin, a second slide lever movable laterally by a disc, and the guide depending on the type of the inserted disc. The guide lever and the second slide lever are provided so as to rotate the lever, and when the insertion of the disc is detected, the disc is stopped at a predetermined clamp position.

[Industrial application field]

The present invention relates to a disc guide mechanism for a disc reproducing device such as a CD disc deck.

[Conventional technology]

CD disc decks are already known and are becoming widely used. A 12 cm diameter CD disc is generally used, but recently, a 8 cm diameter CD disc has come into use. For this reason, it is required to be able to use both a 12 cm CD disk and an 8 cm CD disk in one CD disk deck.
In this case, if the user inserts the 12 cm CD disc and the 8 cm CD disc into the CD disc deck without distinguishing,
It is required to distinguish between a 12 cm CD disk and an 8 cm CD disk in the CD disk deck so that playback can be started. To achieve this requirement, whether a 12cm CD disc or an 8cm CD disc is inserted into the deck, the disc will stop at a given clamp position and then be clamped and playback will begin. Is necessary. In order to stop the disc at a predetermined clamp position, a disc guide mechanism that receives the disc when the disc reaches the clamp position is necessary.

[Problems to be solved by the device]

Japanese Patent Application No. 1-71185, which is a prior application of the present invention, proposes a disk guide mechanism having a guide pin for receiving a disk in order to meet such a demand. Two guide pins stand inside the apparatus in the plane of the disc insertion movement so as to receive the leading peripheral portion of the disc when the disc reaches the clamp position. In order to receive an 8 cm CD disc, the guide pin must be located on a circumference with a radius of 4 cm with respect to the center of the clamp.
Also, in order to receive a 12 cm CD disc, the guide pin must be located on a circumference with a radius of 6 cm with respect to the center of the clamp. In this way, two sets of guide pins are provided for the 8 cm CD disc and the 12 cm CD disc, and when the 12 cm CD disc is inserted, the 8 cm CD is inserted.
The guide pin for the disk was moved outside the circumference with a radius of 6 cm.

Further, the disc is carried to the clamp position by the loading roller driven by the motor, and the motor must be stopped when the disc reaches the clamp position. That is why the disc is in the clamp position,
That is, it is necessary to detect the completion of inserting the disc. For this reason, the insertion completion detection pin similar to the guide pin is provided. Therefore, the conventional disk guide mechanism is quite complicated as a whole.

An object of the present invention is to provide a disc guide mechanism of a disc reproducing device which operates reliably with a relatively simple structure.

[Means for Solving the Problems]

A disc guide mechanism of a disc reproducing apparatus according to the present invention includes a disc engaging portion capable of contacting an inserted disc, an inlet lever movable by contact between the disc and the disc engaging portion, and an inserted disc. A guide pin that receives the force at a position closer to the clamp position, a swivel guide lever that supports the guide pin, and a disc that supports the guide lever and is inserted moves in the disc insertion direction by pressing the guide pin. A possible first slide lever, a stopper that moves together with the first slide lever and stops the first slide lever at a position corresponding to the clamp position of the disc, and a movement direction of the first slide lever. Is movable in another direction
A second slide lever connected to the slide lever, and a connection means for connecting the guide lever and the second slide lever, the connection means being a rack provided on the second slide lever, The guide lever is rotated by the movement of the second slide lever according to the inlet lever, and the guide lever rotates according to the type of the inserted disc, and the guide pin varies depending on the common guide pin. The disk can be positioned and the completion of the disk insertion is detected by the movement of the stopper.

[Action]

In the above structure, the guide pin stands by slightly before the clamp position of the CD disk of 8 cm, for example. When an 8 cm CD disc is inserted, the disc pushes the guide pin and pushes the first slide lever through the guide lever. After that, the first slide lever is stopped by the stopper, and at that time, the disc is stopped at the clamp position.
Therefore, the guide pin moves from a position slightly before the clamp position to the clamp position, during which the completion of the insertion of the disc is detected and the processing necessary for starting the reproduction of the music performance or the like is performed.

When the 8 cm CD disc is inserted, the second slide lever moves almost integrally with the first slide lever. Next, when a 12 cm CD disc is inserted, the second slide lever moves in a direction different from the disc insertion direction (lateral direction) in conjunction with the movement of the first slide lever and the entrance lever. And thereby rotate the guide lever. Therefore, the guide pin supported by the guide lever is brought to a position on the circumference that is larger than when the 8 cm CD disc is inserted, and this position is 12 cm CD
Set to a position suitable for disc clamping. Therefore, also in this case, the disc is stopped at the clamp position and the insertion completion is detected as in the case of the 8 cm CD disc.

〔Example〕

 An embodiment of the present invention will be described below.

1 is an exploded view showing a part of FIG. 2, FIG. 2 is a plan view of the inside of the case of the CD disc deck of the embodiment of the present invention, and FIG. 3 is the front view as seen from the arrow III in FIG. Figures and 4 are the second
FIG. 4 is a side view seen from an arrow IV in the figure.

As shown in FIG. 2, the case 10 has a clamper 12 at substantially the center thereof, and below the clamper 12 is a turntable unit (not shown). The CD disc is inserted in the direction of arrow III from the front entrance in FIG. When the CD disk is inserted, the motor is started by the output of the insertion sensor (not shown), and is carried to the clamp position below the clamper 12 by the loading roller 14 as shown in FIG. 3, for example. The loading roller 14 is attached to a pivotable support lever 16, and when the CD disc reaches the clamp position, the support lever 16 is moved to lower the loading roller 14 to lower the CD disc and the loading roller.
Free from 14 and support it on the turntable unit. It should be noted that FIG. 3 shows a roller driving gear 18 connected to a motor for rotating the loading roller 14.

Figure 2 shows the 8cm CD disc 100 in the clamped position,
The contours of the 12 cm and 12 cm CD discs 102 are shown, respectively.

The clamper 12 is attached to a plate-shaped clamper lever 20. The clamper lever 20 occupies almost half the space on the inner side of the case 10, and the fulcrum of the inner end of the case 10 (not shown)
It is pivotally attached to and can be pivoted toward the turntable unit. The main parts of the disk guide mechanism are attached to the clamper lever 20. Further, on the inlet side of the case 10, a component that operates according to the type of the inserted CD disc is attached.

As shown in FIG. 2, a pair of inlet levers 22 are arranged on the lower surface side of the main holder, which is the upper wall portion of the case 10, and are rotatably attached to the main holder by fulcrum pins 22a. A downward disk engaging pin 24 is attached to one end of the inlet lever 22. As shown in FIG. 3, the disc engaging pin 24 can engage with the disc when it is inserted. Both disc engagement pins
The 24 are biased towards each other by a spring 25, the spacing of which is kept smaller than the diameter of the CD discs, so that when the CD discs are inserted between these disc engagement pins 24, Both discs are on the outer periphery
Pass through while pushing 24 open. The inlet lever 22 further has a pin 22b facing upward.

An intermediate slide lever 26 is provided in a layer between the inlet lever 22 and the main holder. The intermediate slide lever 26 has a straight guide groove 26a extending in a direction perpendicular to the disc insertion direction, and a fulcrum pin 22a having the inlet lever 22 attached to the main holder is passed through each guide groove 26a. Therefore,
The intermediate slide lever 26 can move laterally with respect to the CD disc insertion direction by the engagement between the fulcrum pin 22a and the guide groove 26a. The intermediate slide lever 26 has an opening having an abutment surface 26b, and when the entrance lever 22 is opened when a disc is inserted, the pin 22b of the entrance lever 22 directs each abutment surface 26b to the right in FIG. It is designed to be pushed. A spring 28 is arranged between the intermediate slide lever 26 and the main holder, and biases the intermediate slide lever 26 to the left in FIG. In the state shown in FIG. 2, the intermediate slide lever 26 is in the position moved to the right, and the right end of the guide groove 26a is in contact with the fulcrum pin 22a at this time, so the intermediate slide lever 26 does not move any further.

Further, the intermediate slide lever 26 is formed in an L shape,
The tip of the upper left arm portion corresponding to the vertical side of the L-shape is the intermediate engaging portion 30.

As shown in FIGS. 1 and 2, a pair of guide levers 32, a first slide lever 34, and a second slide lever 36 are attached to the clamper lever 20. Each lever is a plate-shaped lever, and the guide lever 32 is located in the layer immediately above the clamper lever 20, and the second slide lever 36 is provided.
Is the next layer, and the first slide lever 34 is the uppermost layer. First slide lever 34 and second slide lever 36
And have substantially the same shape and are integrated by a spring 38.

The first slide lever 34 has a straight guide groove 34a extending in the disc insertion direction, and the fulcrum pin 20a attached to the clamper lever 20 is passed through each guide groove 34a. Therefore, the first slide lever 34 can move in the disc insertion direction, and the position where the fulcrum pin 20a abuts the end wall of each guide groove 33a is the initial position of the first slide lever 34. Become.

Further, the first slide lever 34 has a straight guide groove 34b extending in a direction perpendicular to the disc insertion direction, and a fulcrum pin 36a attached to the second slide lever 36.
Are passed through the respective guide grooves 34b. Therefore, the second slide lever 36 can move laterally with respect to the first slide lever 34 against the spring 38, and to the right in the illustrated state.

Both ends of the second slide lever 36 are U-shaped, and a rack 40 is formed on the upper surface of the lower end of the U-shape on the left end side, and similarly, on the right end side (opened in the opposite direction). The rack 40 is also formed on the lower surface of the upper side of the U-shape. Further, the engaging portion 42 extends downward from the left end portion of the second slide lever 36, and the engaging portion 42 is engageable with the intermediate engaging portion 30 extending to the upper left of the intermediate slide lever 26. However, the engaging portion 42 is provided at a position spaced from the intermediate engaging portion 30. Therefore, when the 8 cm CD disc 100 is inserted, the amount of movement of the intermediate slide lever 26 to the left is small, so the intermediate engaging portion 30 does not contact this engaging portion 42, and the second slide lever 36 Does not move laterally with respect to the first slide lever 34. When the 12 cm CD disk 102 is inserted, the amount of movement of the intermediate slide lever 26 to the left increases, so the intermediate engaging portion 30 pushes the engaging portion 42,
The second slide lever 36 moves to the right with respect to the first slide lever 34.

The guide lever 32 is rotatably attached to a fulcrum pin 32a extending downward from the first slide lever 34. The guide lever 32 supports the guide pin 44 from the fulcrum pin 32a to the lower end in FIG. This guide pin 44 is
It extends downward through an opening (not shown) provided in the clamper lever 20, and reaches the disc insertion passage similarly to the disc engagement pin 24 of the entrance lever 22. Further, each guide lever 32 integrally supports a gear 46 from the fulcrum pin 32a to the tip end on the upper side in FIG. Each gear 46 is located in a U-shaped space at each end of the second slide lever 36 and engages with each rack 40. Therefore, when the second slide lever 36 is stationary with respect to the first slide lever 34, the guide levers 32 move to the first slide lever 34.
Does not rotate against. When the second slide lever 36 moves to the right, the left guide lever 32 rotates in the clockwise direction, the right guide lever 32 rotates in the counterclockwise direction, and the guide pin 44 moves to the 12 cm CD disc. Move to the clamp position of 102.

Further, above the first slide lever 34, there is a main holder which is an upper wall portion of the case 10, and a stopper lever 48 is attached to this main holder. The stopper lever 48 is a fulcrum pin 48 that extends downward from the main holder.
It is rotatably attached to a and has a downward stopper pin 50 at one end and a downward connecting pin 52 at the other end. Further, an insertion completion operating lever 54 is provided along the upper surface of the right side wall of the case 10 in the disc insertion direction. The insertion completion actuating lever 54 controls the operation associated with the completion of the insertion of the disc in response to the detection of the insertion completion by the guide pin 44, and in accordance with the insertion completion operation by the guide pin 44 in the embodiment. The insertion completion actuating lever 54 has an elongated hole 54a which engages with the connecting pin 52, and is biased upward in FIG. 2 by the spring 56 and can be moved downward.
It is designed to be stopped at a predetermined stroke position when moving downward.

The stopper pin 50 of the stopper lever 48 comes into contact with the wall surface of the first slide lever 34, and the first slide lever 34 is moved to a position above the position shown in FIG. The lever 34 is stopped.

The stop position of the first slide lever 34 is as follows. In FIG. 2, the guide pin 44 is located slightly inside the circle showing the 8 cm CD disc 100 in the clamped position. Therefore, when the 8 cm CD disc 100 is inserted toward the clamp position, the outer peripheral leading edge of the CD disc 100 pushes the guide pin 44, and the guide pin 44 does not rotate and the first slide is performed via the guide lever 32. lever
Press 34 to proceed. At this time, the stopper lever 48 and the insertion completion operating lever 54 are driven. Then, when the insertion completion operating lever 54 stops at the position of the predetermined stroke,
The stopper lever 48 stops and becomes a stopper in the true sense, and stops the first slide lever 34. At this time, the guide pin 44 is stopped at a position just outside the circle showing the 8 cm CD disc 100 in FIG. Therefore, 8c
When the m CD disc 100 is inserted, the 8 cm CD disc 100 advances while pushing the guide pin 44 by a slight distance, and is positioned by the guide pin 44 stopped at a predetermined clamp position.

Further, when the 12 cm CD disc 102 is inserted, first, the intermediate slide lever 26 is largely moved leftward by the 12 cm CD disc 102 via the disc engaging pin 24 and the entrance lever 22. The mating portion 30 pushes the engaging portion 42, the second slide lever 36 moves to the right, and the guide lever 32 is rotated to bring the guide levers 32 to the mutually open positions. The position of the guide pin 44 at this time is C of 8 cm above.
In the same way as when the D disc 100 is inserted, the
It is slightly inside the circle showing the CD disc 102. Then, when the 12 cm CD disc 102 comes into contact with the guide pin 44, the intermediate slide lever 26 returns to the original position, but the guide lever 32 and the guide pin 44 are in the rotated position, and then the 8 cm CD As with disk 100
The 12 cm CD disc 102 pushes the guide pin 44. The guide pin 44 advances while pushing the first slide lever 34,
The slide lever 34 is stopped at a predetermined position by the stopper lever 48, and the guide pin 44 is 12 cm in FIG.
Stop at a position just outside the circle showing the CD disc 102.

Thus, according to the present invention, a set of guide pins 44
Allows, for example, both an 8 cm CD disc 100 and a 12 cm CD disc 102 to be stopped at their respective clamp positions, and while the guide pin 44 moves from a position slightly before the clamp position to the clamp position. Then, the completion of the insertion of the disc is detected, and the processing necessary for starting the reproduction of the music performance is performed.

Next, with reference to FIGS. 4 to 8, the structure and operation of the device upon detection of insertion completion will be described. 4 is a side view seen from the arrow IV in FIG. 2, FIG. 5 is a front view of a main slide lever provided on the side surface of the case, and FIG. 6 is a view showing a gear train provided on the side surface of the case. FIG. 7 is a view showing a part of the planetary gear unit of this gear train in another position.

Referring to FIG. 4, the insertion completion actuating lever 54 connected to the stopper lever 48 has a U-shaped engaging portion opened downward.
54a. A main slide lever 60 is provided along the side wall of the case 10. The main slide lever 60 has a guide groove 60a, and a fulcrum pin 10a extending from the side wall of the case 10.
Through the guide groove 60a, and thus the main slide lever 6
0 is movable in the disc insertion direction. A trigger lever 62 is provided in a substantially vertical direction between the engaging portion 54a of the insertion completion actuating lever 54 and the one fulcrum pin 10a. The trigger lever 62 is rotatably attached to the fulcrum pin 10a,
The connecting pin 62a at the upper end engages with the engaging portion 54a. further,
A notch 62b is provided in the middle of the trigger lever 62.

Further, a gear train as shown in FIG. 6 is provided on the inner side of the side wall of the case 10. FIG. 4 shows the supporting levers 16 of the loading roller 14 and the planet carrier 64, which are simply shown in FIG. 2, and these levers support one of the gears of FIG. . Further, the planet carrier 6 is provided in the notch 62b in the middle of the trigger lever 62.
Four connecting pins 64x engage.

The support lever 16 is rotatably attached to the fulcrum shaft 16a,
Roller drive gear coaxial with loading roller 14 at the tip
It supports 18 (Fig. 6). In the middle of the support lever 16 there is a connecting pin 16b, which is the main slide lever 60.
Is passed through the diagonal groove 60b. Therefore, when the main slide lever 60 moves in parallel, the support lever 16 rotates around the fulcrum shaft 16a, and the loading roller 14 and the roller drive gears are rotated.
18 is lowered (or raised).

As shown in FIGS. 4, 6 and 7, the planet carrier 64 is rotatably mounted about a fulcrum shaft 64a,
The sun gear 66 is attached to the fulcrum shaft 64a. The sun gear 66 is connected to a motor (not shown) via intermediate drive gears 68 and 70. A first planetary gear 72 is attached to the end of the planet carrier 64 opposite to the connecting pin 64x.
The planetary gear 72 is always engaged with the sun gear 66 and is selectively engageable with the roller drive gear 18. Also, the connecting pin 64
A second planet gear 74a is mounted between x and the fulcrum shaft 64a, and the second planet gear 74a includes an integral pinion 74b.

As shown in FIGS. 4 and 5, an opening 60c is provided in the middle portion of the main slide lever 60, and a rack 76 is formed on the bottom wall of the opening 60c. Second planetary gear 74
The a is always engaged with the sun gear 66, and the small gear 74b integral with the second planetary gear 74a faces the opening 60c and can be selectively engaged with the rack 76. In addition, the main slide lever 60
A right-angled groove 60d is provided on the right side of the opening 60c of the planet carrier 64, and the connecting pin 64x of the planet carrier 64 is inserted through the right-angled groove 60d and engaged with the notch 62b in the middle of the trigger lever 62. Has become.

In the operation of the device upon detection of the insertion completion, each component is in the state shown in FIG. 4 when the disc is inserted. When the disc is inserted, the motor is activated and the sun gear 66
And the roller drive gear 18 is driven via the first planetary gear 72. At this time, the connecting pin 64x of the planet carrier 64 engages with the notch 62b of the trigger lever 62, and the planet carrier 6
4 is in a substantially horizontal position (Fig. 6). Therefore, the small gear 74b integral with the second planetary gear 74a is in a position floating from the rack 76.

As described above, as the disc advances, the disc contacts the guide pin 44 inside the case 10, and the guide pin 44
And the first slide lever 34 is pushed, and at the same time, the stopper lever 48 and the insertion completion operating lever 54 move. When the insertion completion actuating lever 54 moves to the left in FIG. 4, the trigger lever 62 rotates counterclockwise. As a result, the connecting pin 64x of the planet carrier 64 disengages from the notch 62b of the trigger lever 62, and the planet carrier 64 rotates clockwise. The movement of the planet carrier 64 is restricted by the connecting pin 64x passing through the right-angled groove 60d of the main slide lever 60. When the connecting pin 64x falls to the bottom of the right-angled groove 60d, the first planet gear 72 separates from the roller driving gear 18 and the second planet gear 72 moves.
A small gear 74b integral with 74a engages the rack 76 (7th
Figure).

When the small gear 74b integrated with the second planetary gear 74a is engaged with the rack 76, the driving force of the sun gear 66 is transmitted to the rack 76 via the second planetary gear 74a and the small gear 74b, and the main slide lever is transmitted. The 60 is moved to the right in FIG. Therefore, the support lever 16 rotates around the fulcrum shaft 16a, and the loading roller 14 and the roller drive gear 18 are lowered. Also, the main slide lever 60 has a clamper lever.
An engaging portion 60e (FIG. 5) for engaging with 20 is also provided, and the clamper lever 20 is also lowered by the movement of the main slide lever 60. Finally, as described above, the guide pin 44 and the first slide lever 34 stop at the clamp position. When the disc is ejected, the motor is driven in the opposite direction, and the levers and gears operate in the reverse order of the above.

As described above, in the above configuration, first, the first planetary gear 72 is separated from the roller driving gear 18 to stop the driving of the roller driving gear 18, and then the main slide lever 60 is moved to lower the loading roller 14, The disc is positioned by the guide pin 44 while the loading roller 14 is descending. This prevents the disc from being forcibly stopped by the guide pin 44 while receiving the positive driving force.

[Effect of device]

As described above, the disc guide mechanism of the disc reproducing apparatus according to the present invention has the disc engaging portion which can come into contact with the inserted disc and which is movable by the contact between the disc and the disc engaging portion. A guide pin that receives the inserted disc at a position closer to the clamp position, a rotatable guide lever that supports the guide pin, and a disc that supports the guide lever and that is inserted pushes the guide pin. A first slide lever that is movable in the disc insertion direction by means of a stopper, a stopper that moves together with the first slide lever, and that stops the first slide lever at a position corresponding to the clamp position of the disc; Second slide lever movably connected to the first slide lever in a direction different from the movement direction of the slide lever of And a connecting means for connecting the guide lever and the second slide lever, the connecting means comprising a rack provided on the second slide lever and a gear provided on the guide lever, By the movement of the second slide lever according to the entrance lever, the guide lever rotates in accordance with the type of the inserted disc, and different guides can be positioned by a common guide pin. Since the configuration is such that the insertion of the disc is detected by the movement of the stopper, 1
With a pair of guide pins, eg 8 cm CD disc and 1
A 2 cm CD disc can be stopped together at each clamp position, and the completion of the disc insertion can be detected while the guide pin moves from the position slightly before the clamp position to the clamp position. The overall structure can be simplified.

[Brief description of drawings]

1 is an exploded view showing a part of FIG. 2, FIG. 2 is a plan view of the inside of the case of the CD disc deck of the embodiment of the present invention, and FIG. 3 is the front view as seen from the arrow III in FIG. Figures and 4 are the second
FIG. 5 is a side view seen from the arrow IV in the figure, FIG. 5 is a front view of a main slide lever provided on the side surface of the case, FIG. 6 is a view showing a gear train provided on the side surface of the case, and FIG. 7 is a planetary gear device. It is a figure which shows that it is in another position. 10 ... Case, 12 ... Clamper, 14 ... Loading roller, 16 ... Support lever, 18 ... Roller drive gear, 20 ...
… Clamper lever, 22 …… Inlet lever, 24 …… Disk engaging pin, 26 …… Intermediate slide lever, 32 …… Guide lever, 34 …… First slide lever, 36 …… Second slide lever, 40 ... Rack, 44 ... Guide pin, 46 ...
… Gear, 48 …… Stopper lever, 54 …… Insertion completion operation lever, 60 …… Main slide lever, 62 …… Trigger lever, 64 …… Planet carrier, 66 …… Sun gear, 72 …… First planetary gear , 74a, 74b …… Second planetary gear, 76 …… Rack.

Claims (1)

[Scope of utility model registration request] 1. An inlet lever (22) having a disc engaging portion (24) capable of contacting an inserted disc and movable by contact between the disc and the disc engaging portion, and an inserted disc. A guide pin (44) received at a position closer to the clamp position, a swivelable guide lever (32) supporting the guide pin, and a disc supporting the guide lever and being inserted pushes the guide pin. First slide lever (34) that can be moved in the disc insertion direction by
And a stopper (48, 50) that moves together with the first slide lever and stops the first slide lever at a position corresponding to the clamp position of the disc, and a movement direction of the first slide lever A second slide lever (36) movably connected to the first slide lever, and a connecting means for connecting the guide lever and the second slide lever. A rack (40) provided on the second slide lever and a gear (46) provided on the guide lever, and the guide lever is moved by the movement of the second slide lever according to the inlet lever. Depending on the type of the inserted disc, the common guide pin can be used to position different discs, and the movement of the stopper can detect the completion of disc insertion. Disc guide mechanism of the disk reproducing apparatus, characterized in that the the like.