KR100357738B1 - Disk centering mechanism of disk reproduction apparatus - Google Patents

Abstract

The "disc centering mechanism of the disc reproducing apparatus" of the present case is provided with a pair of left and right front levers rotatably installed near the disc insertion openings, and at the same time, a regulating means composed of a pair of regulating levers that can be interlocked with each other. If only one front lever is pushed and rotated around the insertion disc, this one front lever will try to rotate the corresponding control lever, but the other control lever linked to it will be rotated by the other front lever. Exercise is prohibited.

Description

Disc centering mechanism of the disc player {DISK CENTERING MECHANISM OF DISK REPRODUCTION APPARATUS}

The present invention relates to, for example, a disc reproducing apparatus using an optical disc as a medium, and more particularly, to a disc centering mechanism that allows a small-diameter disc to be naturally inserted without being eccentric when a large and small disc is selectively inserted into the reproducing apparatus. .

In the disc reproducing apparatus, a disc centering mechanism for positioning a disc inserted at a disc insertion slot at a predetermined disc loading position, and a pair of left and right front levers are provided symmetrically around the insertion slot, and the disc is clamped from left to right. It is known to naturally guide the loading position while preventing the disc from being eccentric.

However, in the configuration of inserting large and small discs of 12cm and 8cm, the rotational momentum of the pair of left and right front levers should be set largely in accordance with the diameter of the large diameter disc. Therefore, when inserting a small diameter disc, only one front lever will rotate even if the disc is eccentric. There was a fear that the centering effect could not be exerted by allowing the disc to be inserted as it is.

Disclosure of Invention An object of the present invention is to provide a disc centering mechanism in which a small diameter disc can be naturally inserted without being eccentric in a disc centering mechanism of a disc reproducing apparatus for selecting and inserting a large and small disc in a disc insertion slot to position an inserted disc at a loading position. It is in doing it.

The mechanism of claim 1 is provided with a pair of left and right front levers rotatably positioned near the disc insertion hole, and at the same time, a regulating means composed of a pair of regulating levers rotatably interlocked with each other. When the rotational movement is pushed around, each control lever naturally rotates to allow the insertion of the disc. If only one front lever is pushed around the insertion disc and rotates, the front lever of one side rotates the corresponding control lever. The other regulating lever which cooperates with this, however, is configured to prohibit further rotational movement of only one front lever by inhibiting the rotational movement by the other front lever.

In the mechanism of claim 2, a guide surface extending through the inclined end portion from the first engaging portion is provided in each of the regulating levers of claim 1 again.

The apparatus of claim 3 further comprises a disc having a disc insertion hole for moving forward and backward in the loading direction of the disc in the loader holder, and selectively inserting a large and small disc at the insertion hole to guide the insertion disc to the loading position by the loader. Applied to the disc centering mechanism of the playback device, a pair of left and right front levers and a left and right rear lever are mounted on the loader for rotational movement, and at the same time, a regulating means composed of a pair of regulating levers capable of rotating and interlocking with each other is installed. When the pair of front levers are all pushed around the insertion disc and rotated, each regulating lever naturally rotates to allow insertion of the disc, and guides the disc to a pair of rear levers to a predetermined position in the loader. Only the lever is pushed around the insertion disc to rotate Here the front lever rotates the control lever on the side of the corresponding movement, but is configured by being other regulatory lever is prohibited rotational movement by the other front lever interlocked thereto so as to prohibit further rotational movement of only one of the front lever.

According to the disc centering mechanism of claim 1, if the disc is eccentric when the small-diameter disc is inserted in the disc insertion port, only one front lever is pressed around the disc, and the rotational movement of only one front lever is prohibited by the restricting means. As a result, the small diameter disk is pushed to the center by the resistance of one front lever, and the disk is naturally guided to the loading position by simultaneously rotating the pair of front levers while preventing the disk from being eccentric.

According to the mechanism of claim 2, when a large diameter disc is inserted, when a pair of left and right front levers are pushed to a large diameter and rotates greatly, each front lever is pushed toward the guide surface beyond the inclined end at the first engaging portion of the regulating lever and rotates greatly. Let's do it.

According to the mechanism of claim 3, when the disc is eccentric when the small-desk desk is inserted into the loader through the disc insertion hole, only one front lever is pushed around the disc, and the rotation means of only one front lever is prohibited by the restricting means. . As a result, the small-diameter disk is pushed to the center by the resistance of one front lever and guided in the correct insertion direction at the disk insertion port. The insertion discs imported between both front levers are guided to a predetermined position in the loader even by a pair of rear levers, and the loader moves again in the loader holder, and the insertion discs are conveyed toward the predetermined loading positions.

1 shows the appearance of a disc reproducing apparatus. The chassis 2 of this disc reproducing apparatus has a large front opening, and inside the reproducing unit 4 is arranged through a plurality of support springs 6. In addition, only one support spring 6 is shown in FIG. The rear end of the regeneration unit 4 is axially supported by the chassis 2 so as to be capable of rotating up and down via a damper (not shown).

Although not shown, the regeneration unit 4 includes a turntable, a regeneration unit, a reciprocating mechanism of a loader described later, and the like before the disc insertion is in the lowered position.

At the position above the regeneration unit 4 in the chassis 2, a loader holder 8 made of a rectangular plate is incorporated. As shown in FIG. 3, both sides of the loader holder 8 are folded in the shape below to form a pair of rail grooves 10 facing each other. The front end of the loader holder 8 is provided with a flange portion projecting upward.

A loader 12 is disposed on the lower surface side of the loader holder 8, and the loader 12 is driven in the front-rear direction by the reciprocating mechanism according to the pair of rail grooves 10 of the loader holder 8.

The loader 12 has a flat box shape, and the front end is a disk insertion port 14 for selectively inserting large and small disks. Although not shown, an opening through which a turntable and a reproducing head on the regeneration unit 4 side is provided is provided in the lower plate of the loader 12.

As shown in FIG. 2, a pair of lever units 16L and 16R are attached to the upper surface of the loader 12, but since they are symmetrical, only the lever unit 16R on the right side will be described below unless otherwise required. .

The lever unit 16R mainly consists of the front lever 18 located in the vicinity of the disc insertion hole 14 in the loader 12 and the rear lever 20 located inside the loader 12. The rear end of the front lever 18 is located in the center of the loader 12 and is supported by the support shaft 22 protrudingly installed on the upper surface of the loader 12 so as to be rotatable.

The front lever 18 has a long hole in the front and rear direction in the center portion. Moreover, it has the disk contact part 24 extended below at the front end, and this disk contact part 24 is projected a little from the disk insertion port 14. As shown in FIG. A part of the front end surface of the loader 12 is formed in an arc-shaped structure centered on the support shaft 22 in accordance with the rotational movement trajectory of the disc contact portion 24. The front lever 18 always rotates in the direction of narrowing the gap between the disc contact portions 24 of the left and right front levers 18 by a spring (not shown) formed between the lever 18 and the loader 12. It is elastically supported.

Moreover, the front lever 18 has the engaging projection 28 in the center part, and this engaging projection 28 protrudes on the upper surface side of the loader holder 8 through the 1st opening 30 of the loader holder 8. Moreover, as shown in FIG. I'm making it. As shown in FIG. 3, the first opening 30 is provided with a pair of left and right and extends long from the front edge 8a of the loader holder 8 to the rear end vicinity.

When the front lever 18 is in the initial position shown in FIG. 2, the engaging projection 28 is fitted into the engaging groove portion 30a (see FIG. 3) of the first opening 30. As shown in FIG.

Moreover, the loader holder 8 has the 2nd opening 34 in the inner position of each 1st opening 30. As shown in FIG. The opening 34 extends thinly and elongated from the front end edge 8a to the rear end of the loader holder 8 to insert the pin 36 protruding from the front end portion of the front lever 18. This pin 36 is in a position protruding slightly from the front edge 8a of the loader holder 8 when the front lever 18 is in the second initial position.

In addition, a central opening 62 is formed in the first half of the loader holder 8. As shown in FIG. 1, the clamping spring 72 is attached to the upper surface of the loader holder 8, and the front end of the clamping spring 72 is inserted into the inner end of the central opening 62. As shown in FIG.

The rear lever 20 is disposed near the rear end of the front lever 18 and extends slightly in the axial direction of the loader 12. The rear lever 20 has a shaft 38 at the center of the lower surface thereof, and the shaft 38 is slidably fitted in the guide hole 40 formed in the loader 12 in the axial direction.

The rear lever 20 approaches the disc insertion hole 14 of the loader 12 by its inner end by a spring (not shown) spanned between the lever 20 and the support shaft 22 of the front lever 18. The shaft 38 is elastically supported toward the axial direction of the loader 12 at the same time as the rotary motion is elastically supported in the direction to make it, and is located at the outer end of the guide hole 40 in the initial position shown in FIG.

At the inner end of the rear lever 20, a disk contact portion 44 protrudes downward, and the disk contact portion 44 is positioned in the loader 12 through an arc-shaped opening (not shown) of the loader 12. I'm making it.

On the other hand, a pin 46 protrudes from the upper outer end of the rear lever 20, and a third opening 48 for inserting the pin 46 is formed in the loader holder 8. The opening 48 is elongated from the center of the loader holder 8 to the rear in the outer position of the first opening 30, and the engaging end 50 in the middle position thereof is formed to the rear. And when the rear lever 20 is in the initial position shown in FIG. 2, the pin 45 is located in the front-end | tip of the engaging end part 50. As shown in FIG.

At the rear end of the front lever 18, a push arm 52 is formed to extend toward the upper surface of the rear lever 20. Moreover, the stopper pin 60 located in the inside of the push arm 52 protrudes from the upper surface of the rear lever 20. As shown in FIG.

In the center of the front part of the loader 12, the clamper 74 shown in FIG. 2 is mounted freely and freely moving up and down by a small amount.

As shown in FIG. 2, a pair of left and right regulating levers 76L and 76R are arranged on the upper and lower surfaces of the loader holder 8 in a symmetrical manner. Since both levers 76L and 76R are symmetrical, only the regulating lever 76R on the right side will be described. This leads to the axial direction of the loader holder 8 and pins protruding from the inner end of the loader holder 8 to the loader holder 8. The rotational motion is freely supported by the 78.

A sector gear 80 is formed at the inner end of the regulating lever 76R, and the sag gears 80 of the left and right regulating levers 76L and 76R are engaged with each other so as to be interlocked with each other to enable rotational movement. Both regulating levers 76L and 76R are always elastically supported in a direction in which the outer end is rotated toward the rear of the loader holder 8 by a spring 82 interposed between each other.

The outer end of the regulating lever 76R is formed in a V shape, and the V-shaped portion 84 is positioned on the corresponding front lever 18. An engagement groove 86 is formed in the base of the V-shaped portion 84, and when the front lever 18 is in the initial position shown in FIG. 2, the front lever 18 as shown in FIG. The engaging projection 28 of () is located in the engaging groove 86.

As shown in FIG. 4, the surface facing the disk insertion direction A of the engaging groove 86 and the surface opposite thereto both approach the outer end of the regulating lever 76R, and thus the disk insertion direction A The first engaging portion 88 and the second engaging portion 90 which are inclined to each other). The inner surface of the V-shaped portion 84 facing the disk insertion direction A is guided through the inclined end portion 92 having a large inclination angle from the first engaging portion 88 to the V-shaped portion 84 tip. 94 are continuously formed.

On the other hand, the second engagement portion 90 is connected to the other inner side surface 96 of the V-shaped portion 84 and the first engagement portion at the boundary between the inner side surface 96 and the second engagement portion 90. Semi-circular small protrusions 98 protruding toward the fitting portion 88 are formed.

In the second state in which the front lever 18 is in the initial position, the inner surface 96 is substantially parallel to the disc insertion direction A, and the extension line of the inner surface 96 and the first engaging portion 88 When the intersection point is expected, the intersection point is almost at the center of the first engagement portion 88 and the distance from the intersection point to the boundary between the first engagement portion 88 and the inclined end portion 92 is that of the engagement projection 28. It is set larger than the maximum width dimension.

Each of the inner side surfaces of the V-shaped portion 84, the first and second engagement portions 88 and 90, and the respective edge portions of the inclined end portions 92 are stepped groove portions 100 having a thin thickness by a predetermined width.

Meanwhile, as illustrated in FIG. 5, jaws 102 are provided on the front and rear ends of the engaging protrusions 28, and the step grooves 100 are disposed below the locking jaws 102. It is supposed to go in. In addition, in FIG. 4, the locking tank 102 is shown with the broken line for convenience.

Next, the insertion operation and ejection operation of the small-diameter disks CDs having a diameter of 8 cm and the large-diameter disks CDb having a diameter of 12 cm will be described with reference to FIGS.

Insertion of small diameter discs

When there is no disc in the disc player, the loader 12 is located at the front end of the loader holder 8 (unloading position) as shown in FIG. 6, and the front lever 18 and the rear lever 20 are At each initial position. At this time, the engaging projection 28 of each front lever 18 is in the engaging groove portion 86 of the regulating lever 76, and the engaging projection 28 has a first engagement with the elasticity of the spring 82. The part 88 is pushed in, and the step groove 100 of the first engaging part 88 enters under the locking tab 102 in front of the engaging projection 28.

Thus, when the small-diameter discs (CDs) are inserted into the disc insertion hole 14, the discs may be inserted straight at the center position as shown by the dashed-dotted line in FIG. 6, but for example, the Upron lever 18 as shown by the solid line. If it is to be inserted in the side biased direction (when it is biased to the left front lever side, the following description will be reversed). Only the right front lever 18 is used because the circumference of the disc pushes only the disc contact portion 24 of the right front lever 18. In FIG. 6, it rotates clockwise. Accordingly, the engaging projection 28 of the right front lever 18 moves away from the engaging groove portion 30a, and shifts from the first engaging portion 88 of the regulating lever 76R to the inclined end portion 92 and the right regulation is performed. The lever 76R is rotated clockwise.

However, when the right regulating lever 76R rotates clockwise, the left regulating lever 76L tries to rotate in the counterclockwise direction, and the second engaging portion 90 of the left regulating lever 76L is the left front lever. The stepped groove portion 100 of the second engaging portion 90 enters below the locking jaw 102 of the engaging projection 28 in contact with the engaging projection 28 of (18). And the contact relationship of the 2nd engagement part 90 and the engagement protrusion 28 is hold | maintained by the semicircular small protrusion 98. As shown in FIG.

In this way, if the rotational movement of the left regulating lever 76L is prevented by the engaging projection 28 of the left front lever 18, the right regulating lever 76R is further prevented from rotating. The rotational motion of 18) is also blocked.

The relationship between the front lever 18 and the regulation lever 76 described above is enlarged in FIG. That is, according to the rotational movement of the right front lever 18, the pair of regulating levers 76L and 76R interlock with each other to rotate from the position of the broken line to the position of the solid line during the seventh way, but the left front lever 18 remains in its initial position. It will stay in to prevent further rotational movement of the U front lever 18.

As a result, the disks CDs are resisted by the right front lever 18 and are driven to the center of the loader 12 as shown in FIG. However, in the state of FIG. 8, the center of the small diameter disks CDs is still on the right side by a short distance E from the center line L of the loader 12, and the circumference of the small diameter disks CDs is of the left front lever 18. There is no contact with the disc contact portion 24.

When the small-diameter discs CDs are pushed back to the left in the position of FIG. 8 and located on the center line L of the loader 12, the right front lever 18 is returned slightly toward the initial position, and accordingly, a pair of regulating levers ( 76L, 76R) are also returned to the initial position. In this state, the circumference of the discs CDs is simultaneously pushed by the disc contact portions 24 of the left and right front levers 18 as shown in FIG. 9 and the second engaging portion 90 of the left regulating lever 76L is provided. Is separated from the engaging projection 28 of the left front lever 18 so that the first engaging portion 88 comes into contact with the engaging projection 28.

When the discs CDs are reinserted in this state, the circumference of the discs CDs simultaneously pushes the disc contact portions 24 of the left and right front levers 18, and the gap between the right and left disc contact portions 24 reaches the diameter of the disc. Rotate the left and right front levers 18 in opposite directions until each other. Therefore, the engaging projection 28 of the left and right front levers 18 rotates outwardly in accordance with the first engaging portion 88 of the corresponding regulating lever 76 and moves the positive regulating levers 76L and 76R. The outer end is interlocked so as to rotate in the direction opposite to the disk insertion direction (A). At this time, the engaging projection 28 of the left and right front lever 18 reaches the inclined end portion 92 of the corresponding regulating lever 76.

When the disks CDs are inserted to the position shown in FIG. 10, the circumference of the disks CDs comes into contact with the disk contact portion 44 of the left and right rear levers 20.

When the discs CDs are inserted again, the circumference of the discs presses the disc contact portion 44 of the left and right rear levers 20, and the left and right rear levers 20 rotate about the axis 38. However, at this time, the pin 46 of the outer end of each rear lever 20 presses the engaging end 50 of the loader holder 8. As a result, the shaft 38 of the left and right rear levers 20 pushes the inner edge of the guide hole 40 of the loader 12 in the disc insertion direction, and moves the loader 12 into the loader holder 8. A slight movement of this loader 12 becomes a trigger signal for starting the reciprocating mechanism provided in the regeneration unit 4. Therefore, after starting the reciprocating mechanism, the loader 12 is driven by the reciprocating mechanism and the discs CDs are conveyed together with the loader 12 to the loading position even if the discs CDs are not pushed. The discs CD are centered by the pair of left and right front levers 18 and the contact portions 24 and 44 of the rear lever 20 to the position shown in FIG. 11 just before reaching the loading position.

As the loader 12 moves, the engaging projections 28 of the front and left front levers 18 are separated from the engaging grooves 85 of the regulating levers 76L and 76R, so that the outer ends of the regulating levers 76L and 76R are moved. Are rotated together by the spring 82 in the disc insertion direction. Moreover, the pin 36 of the left and right front levers 18 moves along the 2nd opening 34, and the pin 46 of the rear lever 20 moves inside the 3rd opening 48 inside.

When the loader 12 reaches the loading position shown in FIG. 12, the reciprocating mechanism stops. At this time, the pin 46 of the rear lever 20 enters the groove portion 48c provided at the rear end edge of the third opening 48, and the disk contact portion 44 is separated around the disk CDs. Moreover, the pin 36 of the left and right front levers 20 enters the groove part 34e provided at the end of the 2nd opening 34, and the disc contact part 24 is isolate | separated about the disk CDs.

Then, the regeneration unit 4 is driven upward and the turntable lifts the discs CDs slightly, and the discs are clamped by the elasticity of the clamping spring 72 to the turntable and the clamper 74 to load the discs. Is complete.

Then, the turntable is rotated and the information recorded on the discs CDs is reproduced by the reproduction head of the reproduction unit 4.

Eject Action of Small Diameter Discs

When an eject signal is given to take out the small-diameter discs CDs from the loading position, the playback unit 4 is lowered, the discs CDs are released from the turntable, and are again placed on the loader 12. And the reciprocating mechanism is operated to move the loader 12 toward the unloading position. Immediately after the start of movement, the pins 36 of the left and right front levers 18 are separated from the groove portion 34a of the loader holder 8, and the pins 45 of the left and right rear levers 20 are the groove portions 48c. The discs CDs are clamped again by the disc contacts 24 and 44 of these levers 18 and 20.

While the loader 12 moves toward the unloading position, the engaging projection 28 of the left and right front levers 18 contacts the guide surfaces 94 of the corresponding regulating levers 76L and 76R, and the regulating lever ( While 76L and 76R are rotated in a direction that resists the spring 82, the regulating levers 76L and 76R move to the spring 82 as the engaging projection 28 approaches the center of rotation of the regulating lever 76. Rotate in the direction of elastic support. When the loader 12 reaches the unloading position of FIG. 6, the engaging projection 28 returns to the first engaging portion 88 via the inclined end portion 92.

Centering operation of large diameter disc (CDb)

When the large-diameter disc CDb is inserted while the loader 12 is in the unloading position of FIG. 6, the eccentricity is slight even if the disc is eccentric in the range of the width dimension of the disc inserting portion 14. The circumference of the CDb pushes the disc contact portion 24 of the front left and right levers 18. Both front levers 18 are pivotally rotated outward in the width direction of the loader 12 and each engaging protrusion 28 pushes the first engaging portion 88 of the corresponding regulating lever 76. It moves along the 1st engagement part 88, and makes these control levers 76L and 76R rotate with respect to the spring 82. As shown in FIG. The left and right engagement projections 28 move along the guide surface 94 from the first engagement portion 88 via the inclined end portion 92 as shown by the double-dotted line in FIG.

On the other hand, in accordance with the rotational movement of the left and right front lever 18, the pin 36 of the tip portion thereof moves along the first opening 30 of the loader holder 8 and the push arm 52 corresponds to the corresponding rear lever 20. ), The stopper pin 60 is pushed inward in the width direction of the loader 12. Accordingly, the left and right rear levers 20 move the shaft 38 inward along the guide holes 40 while resisting each spring, and as a result, the pins of the rear levers 20 as shown in FIG. 46) is removed from the engaging end 50 of the loader holder (8). At this time, the circumference of the large-diameter disk CDb contacts the disk contact portion 44 of the left and right rear levers 20.

When the disc CDb is reinserted, the circumference of the disc CDb pushes the disc contact portions 24 and 44 of the left and right front levers 18 and the left and right levers 20. At this time, since the left and right pusharms 52 are in contact with the stopper pin 60 of the rear lever 20, the rear lever 20 moves inward in the width direction of the loader 12 and rotates in response to each spring. Exercise.

When the left and right rear levers 20 rotate to a predetermined position, the pin 46 of the rear lever 20 is inclined to the front end 48a of the third opening 48 on the loader holder 8 side (third See also). Afterwards, the left and right rear levers 20 rotate with the pins 46 as the points, and push the inner edge of the guide hole 40 with the shaft 38 to bring the loader 12 into the loader holder 8. Slightly shift As a result, the reciprocating mechanism is started to move the loader 12 to the loading position. Also in this case, the disc CDb is conveyed in the centered state by the disc contact portions 24 of the left and right front levers 18 and the disc contact portions 44 of the left and right rear levers 20 just before reaching the loading position. .

In the state where the loader 12 reaches the loading position, the pins 46 of the left and right rear levers 20 enter the groove portions 48b formed at the rear ends of the third openings 48, and the left and right front levers 18 The pin 36 enters the groove portion 30b of the first opening 30, and as shown in FIG. 14, each of the disk contact portions 24 of the front and rear levers 20 on the left and right sides. And 44 are separated around the large-diameter disk CDb.

Thereafter, the reproducing unit 4 is raised and the disc CDb is clamped by the turntable and the clamper 74, and the disc loading operation is completed.

Then, the turntable is rotated and the regeneration operation is executed by the reproducing head.

: Eject operation of large diameter disc (CDb):

Since the ejection operation of the large-diameter disc CDb is the same as that of the small-diameter discs CDs, detailed explanation is omitted, but the ejection operation of the large-diameter disc CDb is sufficiently long for the guide surfaces 94 of the regulating levers 76L and 76R. Therefore, the engaging projection 28 of the corresponding front lever 18 can be received reliably.

In addition, in the above-described embodiment, the configuration in which the loader is disposed in the loader holder so as to move forward and backward, and the front lever, the regulating lever, and the like are attached to the loader has been described. In particular, the inventions of claims 1 and 2 are not limited thereto. . For example, the invention can be implemented by attaching a front lever, a regulating lever, and the like on a fixed chassis of the disc reproducing apparatus.

As described above, the disc centering mechanism of claim 1 is provided in a disc reproducing apparatus capable of inserting large and small discs, and includes a control means composed of a pair of control levers interlocked with each other, and each of the front levers of each pair of left and right control levers. In this case, when a small diameter disc is inserted, when only one front lever is pushed by the disc, the operation of the restraining means is prohibited by the other front lever, thereby preventing the rotational movement of only the other front lever. It can be guided to the center, and even when inserting a small-diameter disc, the centering effect can be clearly demonstrated and the loading can be performed naturally.

In the disc centering mechanism of claim 2, the loading and ejecting operation of the large diameter disk is reliably performed by providing the guide surface via the inclined end portion from the first engaging portion toward the rotational movement end to the left and right regulating levers.

Further, the disc centering mechanism of claim 3 is configured by attaching the front lever, the regulating lever, and the like to a loader disposed in the loader holder so as to move forward and backward, and then attaching a pair of rear levers respectively associated with the left and right front levers. In the case of a large-diameter disk, the center conveyance of the small-diameter disk is surely performed, and the disk conveyance to a predetermined loading position is performed.

1 is an external perspective view of a disc player.

2 is a plan view of the loader holder accommodating the loader.

3 is a plan view of the loader holder only.

4 is an enlarged plan view of a part of a control lever.

5 is a cross-sectional view taken along the line V-V of FIG.

6 is a plan view showing a state before insertion of a disc.

7 is a plan view showing an interlocking relationship between a front lever and a regulating lever.

8 is a plan view showing a state where a disc is inserted in the state of FIG. 6;

FIG. 9 is a plan view showing a state in which a disk is inserted again in the upper frame of FIG.

Fig. 10 is a plan view showing a state in which a disc is inserted again in the state of Fig. 9;

Fig. 11 is a plan view showing a state in which the loader loads the disc to the loading position.

12 is a plan view showing a state in which the small diameter disk has reached the loading position.

13 is a plan view showing a state in which a large diameter disk is inserted.

Fig. 14 is a plan view showing a state where the large diameter disc has reached the loading position;

* Explanation of symbols for the main parts of the drawings

8: loader holder 12: loader

18: Front lever 20: Rear lever

28: engaging protrusion 76: regulating lever

88: first engaging portion 90: second engaging portion

92: inclined end 94: guide surface

CDs: Small Diameter Discs CDb: Large Diameter Discs

Claims (3)

In the disc centering mechanism of a disc reproducing apparatus for selecting and inserting a large and small disc (CD) in the disc insertion port 14 and leading the inserted disc to a loading position, The disk contact portion 24 and the engaging projection 28 are installed so as to be rotatable in a symmetrical position in the vicinity of the insertion opening, and are always elastically supported at the initial position side by a spring, and are used to insert the disk into the insertion opening. And a pair of left and right front levers 18 each of which pushes each disk contact portion around the insertion disc and rotates from its initial position to a position according to the diameter of the insertion disc. And a regulating means composed of a pair of regulating levers 76L and 76R having first and second engaging portions 88 and 90 and capable of rotational movement in conjunction with each other. When the pair of front levers are all pushed around the insertion disc and rotated, each of the control levers rotates by pushing each first engagement portion to the engaging protrusion of each front lever, and only one front lever rotates around the insertion disc. When the rotary lever is pushed in to rotate, the front lever's engaging projection pushes the first latching part of the regulating lever of the corresponding side to rotate the regulating lever, but in conjunction with this, the second engaging part of the other regulating lever A disk centering mechanism of a disc reproducing apparatus, wherein further rotational movement of only the other front lever is prohibited by contacting the engaging projection of the other front lever. 12. The disc reproducing apparatus according to claim 1, wherein each of the regulating levers has a guide surface (94) formed continuously through the inclined end portion (92) from the first engaging portion (88) to the rotary movement end. Disc centering mechanism. A loader 12 having a disc insertion hole 14 is disposed in the loader holder 8 so as to be moved forward and backward in the loader direction, and a small and medium disc is selectively inserted in the insertion hole, thereby inserting the inserted disc by the loader. In the disk centering mechanism of the disk player to guide the loading position, It has a disk contact portion 24 and the engaging projection 28, each disk contact portion is positioned in the left and right symmetrical position near the insertion portion of the loader to be mounted on the loader so as to be rotatable, and to the initial position side by a spring And a pair of left and right front levers 18 which are always elastically supported and which rotate each disk contact portion around the insertion disc in accordance with the insertion of the disc into the insertion hole, thereby rotating from the initial position to the position corresponding to the diameter of the insertion disc. , It has a disk contact portion 44 and each disk contact portion is located in the left and right symmetrical position inside the loader than the disk contact portion 24 of the front lever so as to be rotatably mounted on the loader and is always elastically supported at the initial position by a spring. And a pair of left and right rear levers rotating each disk contact portion 44 around the insertion disk guided in the loader by the rotational movement of the front levers to rotate from the initial position to a position corresponding to the diameter of the insertion disk. With 20, And a regulating means composed of a pair of regulating levers 76L and 76R having a first and a second engaging portion 88 and 90 and capable of rotating in conjunction with each other. When the pair of front levers are all rotated around the insertion disc, each of the control levers rotates by pushing each first engaging portion to the engaging protrusion of each front lever, and only one front lever is rotated around the insertion disc. When pushed and rotated, this front lever's engaging projection pushes the first engaging part of the regulating lever of the corresponding side to rotate the regulating lever, but the second engaging part of the other regulating lever which is linked to the other side And further rotational movement of only the other front lever is prohibited by contacting the engaging projection of the front lever of the front lever of the disc lever.