JPH0650862Y2 - Disk player loading mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] In a CD disc deck or the like, a planetary gear device is provided in a drive gear train that drives a loading roller for inserting the disc into a clamp position inside the device, and the disc is clamped. The roller drive gear was disengaged just before reaching the position to avoid rubbing between the disc and the loading roller.

[Industrial application field]

The present invention relates to a loading 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. When the disc is partially inserted into the deck, the motor is started by the output of the insertion sensor and is carried to the clamp position by the loading roller driven by the motor. For example, as shown in FIG. 8, a loading roller R is provided inside the deck, and when the disc D is inserted into the deck, the disc D is inserted between the loading roller R and an appropriate guide plate (or guide roller). It is supposed to be inserted. A roller drive gear G is attached to the loading roller D, and the roller drive gear G is connected to a motor (not shown). Then, when the disc D is inserted, the loading roller D is driven to advance the disc D in the direction of arrow A to the clamp position. The disc D is positioned by hitting the stopper S at the clamp position, and at the same time, the loading roller D is lowered to place the disc D on the turntable.

[Problems to be solved by the device]

Conventionally, the loading roller D is a pivotally movable support lever L.
The connecting pin attached to the support lever L engages with the slant groove provided on the slide lever (not shown). When the slide lever moves, the support lever L pivots to load the loading roller D. Was supposed to descend. Therefore, the support lever L is pivoted while the slide lever is moved to move the loading roller D.
It takes a certain amount of time to lower the disk D, and it takes time for the disk D to substantially separate from the loading roller D after the disk D hits the stopper S at the clamp position. Rubbing sometimes occurred between.

An object of the present invention is to load a disc reproducing apparatus that can prevent the rubbing between the loading roller and the disc by quickly disconnecting the roller drive gear from the driving gear on the driving side when the disc hits the stopper. It is to provide a mechanism.

[Means for Solving the Problems]

The loading mechanism of the disc player according to the present invention is
A loading roller for inserting the disc into the clamp position inside the disc reproducing device, a roller drive gear for rotating the loading roller, a sun gear driven by a motor, and the sun gear supported by a planet carrier. And a planetary gear that is rotatable around the sun gear and locks the planetary carrier in a position where the planetary gear engages the roller drive gear and locks the lock just before the disc reaches the clamped position. Lock means to release,
It is characterized in that it comprises a guide pin capable of receiving the inserted disc at a position closer to the front side than the clamp position and moving to the clamp position, and that the locking means is configured to interlock with the guide pin. .

[Action]

In the above configuration, the sun gear is connected to the driving gear on the driving side, and drives the roller driving gear via the planetary gear.
The planetary gear receives a reaction force from the roller driving gear and tends to move away from the roller driving gear, but the locking means locks the planet carrier at a position where the planetary gear engages with the roller driving gear. The guide pin acts as a stopper for receiving the disc, and can receive the inserted disc at a position closer to the clamp position and move to the clamp position. The locking means is configured to interlock with this guide pin to release the lock immediately before the disc reaches the clamp position, and the planet gear receives the load from the roller drive gear, so that the planet carrier is immediately released when the lock is released. It rotates (the planetary gear revolves around) and disconnects the roller drive gear from the driving side. Therefore, it takes some time to pivot the support lever of the loading roller to lower the loading roller, and even if it takes time for the disk to substantially separate from the loading roller, the loading roller inertially moves the disk. Only rotation to supply to the clamp position is performed, and rubbing does not occur between the loading roller and the disc.

〔Example〕

 An embodiment of the present invention will be described below.

1 and 2 are views showing a drive gear train of a loading roller according to an embodiment of the present invention, and each gear is attached to each lever in FIGS. 6 and 7. 3 to 6 are views showing a portion of the disc guide mechanism when the disc is inserted.

First, description will be made with reference to FIGS. 3 to 6. 3 is a plan view of the inside of the case of the CD disc deck, FIG. 4 is an exploded view showing a part of FIG. 3, FIG. 5 is a front view seen from the arrow V in FIG. 3, and FIG. FIG. 6 is a side view seen from the arrow VI in FIG. 3.

As shown in FIG. 3, the case 10 has a clamper 12 substantially in the center thereof, and a turntable unit (not shown) is provided below the clamper 12. 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. 5, 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.
Support the turntable unit freely from 14.
It should be noted that FIG. 5 shows a roller drive gear 18 connected to a motor for rotating the loading roller 14.

In Figure 3, the 8 cm 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. 3, 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. 5, the disc engaging pin 24 can engage with the disc when it is inserted. Both disc engagement pins 24
Are urged towards each other by a spring 25, the spacing of which is
It is kept smaller than the diameter of the CD disc, so that when the CD disc is inserted through between these disc engagement pins 24, the outer periphery of the CD disc has both disc engagement pins 24.
Pass while pushing. 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 the 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 of FIG. 3, the intermediate slide lever 26 is at the position moved to the left side, and at this time, the right end portion of the guide groove 26a is in contact with the fulcrum pin 22a, 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. 3 and 4, 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 the gear 46 from the fulcrum pin 32a to the upper end 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 has a 12 cm CD pin. 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 that engages with the connecting pin 52, and is biased upward in FIG. 3 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. 3, 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 CD disc 100 of m is inserted, the CD disc 100 of 8 cm 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.

When the 12 cm CD disc 102 is inserted, first, the intermediate slide lever 26 is largely moved to the left by the 12 cm CD disc 102 via the disc engaging pin 24 and the entrance lever 22. The engagement portion 30 pushes the engagement 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 opened positions. The position of the guide pin 44 at this time is slightly inside the circle showing the 12 cm CD disk 102 in FIG. 3, as in the case where the 8 cm CD disk 100 is inserted. 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 the disc 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 first slide lever 34 is stopped at a predetermined position by the stopper lever 48, and the guide pin 44 indicates the 12 cm CD disk 102 in FIG. Stop at a position just outside.

Thus, in the embodiment, a set of guide pins
Depending on 44, for example 8 cm CD disc 100 and 12 cm CD
Both the disks 102 can be stopped at their respective clamp positions, and while the guide pins 44 move from the position slightly before the clamp position to the clamp position, the completion of the insertion of the disc is detected, and the music performance etc. Perform the processing required to start playback of the.

Next, with reference to FIGS. 1 and 2, and FIGS. 6 and 7, the loading mechanism and operation associated with detection of insertion completion will be described. 6 is a side view seen from the arrow VI in FIG. 3, FIG. 7 is a front view of a main slide lever provided on the side surface of the case, and FIG. 1 is a view showing a gear train provided on the side surface of the case. FIG. 2 is a view showing a part of the planetary gear device of the gear train in another position.

Referring to FIG. 6, the insertion completion actuating lever 54 connected to the stopper lever 48 includes 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. The trigger lever 62 that acts as a locking means is the insertion complete operation lever
It is provided between the engaging portion 54a of 54 and one of the fulcrum pins 10a in a substantially vertical direction. The trigger lever 62 is rotatably attached to the fulcrum pin 10a, and the connecting pin 62a at the upper end is engaged with the engaging portion 5a.
Engage 4a. Further, a notch 62b is provided in the middle portion of the trigger lever 62.

Further, a gear train as shown in FIG. 1 is provided on the inner side of the side wall of the case 10. FIG. 6 shows the supporting levers 16 of the loading roller 14 and the planet carrier 64, which are simply shown in FIG. 5, and these levers support one of the gears of FIG. . In addition, in the notch 62b in the middle of the trigger lever 62, the planet carrier 64 is
The connecting pin 64x of is engaged.

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. 1). 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. 1, 2 and 6, 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. 6 and 7, 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 to be engaged with the notch 62b in the middle of the trigger lever 62. Has become.

In the operation of the loading mechanism upon detection of the insertion completion, each component is in the state shown in FIGS. 1 and 6 when the disc is inserted. When the disc is inserted, the motor is activated to drive the roller drive gear 18 via the sun gear 66 and 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 64 is in a substantially horizontal position (first
Figure). Therefore, a small gear 74b that is integral with the second planetary gear 74a
Is in a position floating above rack 76.

As mentioned above, as the disc advances, the disc contacts the guide pins 44 inside the case 10,
44 and the first slide lever 34 are 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. 6, the trigger lever 62 rotates counterclockwise. As a result, the connecting pin 64x of the planet carrier 64 is notched 62b in the trigger lever 62.
Disengaged (unlocked) and 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 freezing pin 64x falls to the bottom of the right-angled groove 60d, the first planetary gear 72 moves away from the roller drive gear 18 and the second planetary gear 74a and the small gear 74b integral with the rack 76 move.
(FIG. 2).

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. 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 driving device 18 are lowered.
Further, the main slide lever 60 is also provided with an engaging portion 60e (FIG. 7) for engaging with the clamper lever 20, 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
The slide lever 34 of stops at the clamp position. In addition,
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 quickly separated from the roller drive gear 18 to quickly
Is stopped, and then the main slide lever 60 is moved to lower the loading roller 14 while positioning the disc with the guide pin 44. Therefore, it takes some time for the supporting lever 16 of the loading roller 14 to pivot and the loading roller 14 to descend, so that the disc is not loaded by the loading roller 14.
Even if it takes time to substantially separate from the loading roller 14, the loading roller 14 rotates only to the extent of supplying the disc to the clamp position due to inertia, and the loading roller 14
Rubbing does not occur between the disc and the disc.

Particularly, when the disc is inserted, as shown in FIG. 1, the first planetary gear 72 rotates in the direction of arrow B and the roller drive gear 18 rotates in the direction of arrow C. Roller drive gear
Since 18 drives the loading roller 14,
The roller drive gear 18 applies a load to the first planetary gear 72. In the field of using planetary gears, it is common knowledge that planetary gears that rotate without receiving a load do not shift from rotation to revolution, and normally, the one that causes a load such as a spring on the rotation shaft of the planetary gears. Attach it to load the planetary gears. However, in the present invention, the planetary gear device is used for the driving system of the loading roller, and
A load is applied to the first planetary gear 72 by meshing the planetary gear 72 of FIG. 1 with the roller drive gear 18, and the connecting pin 64x of the planet carrier 64 is formed in the notch 6 of the trigger lever 62.
The first planetary gear 72 shifts from the rotation to the revolution simply by disengaging (unlocking) from 2b, and immediately the roller drive gear
The 18 is separated from the driving side.

[Effect of device]

As described above, the loading mechanism of the disc reproducing apparatus according to the present invention includes a loading roller for inserting the disc into the clamp position inside the disc reproducing apparatus, a roller driving gear for rotating the loading roller, and a motor. A sun gear driven by a planetary carrier, a planetary gear supported on a planetary carrier and engaging the sun gear and rotatable about the sun gear, and a position where the planetary gear engages the roller drive gear. Lock means for locking the planet carrier and releasing the lock just before the disk reaches the clamp position, and a guide pin capable of receiving the inserted disk at a position closer to the clamp position and moving to the clamp position, Since the locking means is configured to interlock with the guide pin, the loading roller is Only rotate about supply disk to the clamp position, rubbing does not occur between the loading roller and the disc.

[Brief description of drawings]

FIG. 1 is a view showing a gear train of an embodiment of the present invention, FIG. 2 is a view showing a planetary gear device in another position, and FIG. 3 is a plan view of the inside of a CD disc deck of the embodiment. 4 is an exploded view showing a part of FIG. 3, FIG. 5 is a front view seen from the arrow V in FIG. 3, and FIG. 6 is a side view seen from the arrow VI in FIG.
FIG. 7 is a front view of the main slide lever, and FIG. 8 is a view showing a conventional technique. 10 …… Case, 12 …… Clamper, 14 …… Loading roller, 16 …… Support lever, 18 …… Roller drive gear, 20 …… Clamper lever, 22 …… Inlet lever, 24 …… Disc engagement 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 operating lever, 60 …… main slide lever, 62 …… trigger lever, 64 …… planetary carrier, 66 …… sun gear, 72 …… first planetary gear, 74a, 74b …… Second planetary gear, 76 ... rack.

Claims (1)

[Scope of utility model registration request] 1. A loading roller (14) for inserting a disc into a clamp position inside a disc reproducing apparatus.
A roller driving gear (18) for rotating the loading roller, and a sun gear (66) driven by a motor.
And a planetary gear (72) which is supported by a planetary carrier (64) and engages with the sun gear and is rotatable around the sun gear.
Locking means (62) for locking the planet carrier at a position where the planet gear engages with the roller driving gear and unlocking the disc just before the disc reaches the clamp position;
Guide pin (44) that can receive the inserted disc at a position closer to the clamp position and can move to the clamp position
And a loading mechanism of the disk reproducing device, wherein the locking means is configured to interlock with the guide pin.