JPH0744965A - Disk reproducing device - Google Patents

Abstract

PURPOSE:To provide a disk reproducing device which does not get in the way even at the time when it is installed in a car, for example, and can handle large and small diameter disks with a good operability. CONSTITUTION:The device is provided with a slide member S which holds an inserted disk CD, a guide member G which guides the member S along the direction in which the disk is inserted and a driving device 10 which makes the member S perform reciprocating motion along the member G. The member S is provided with a disk diameter detection means M which detects the diameter of the disk CD and a slide member pushing means U whose position is changed by the disk diameter detected by the means M. The member G is provided with a large diameter disk section 27 which is to be pressed and a small diameter disk member 28 which is to be pressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large / small diameter disc reproducing apparatus for handling a large diameter disc such as a 12 cm CD and a small diameter disc such as an 8 cm CD.

[0002]

2. Description of the Related Art A conventional disk reproducing apparatus that can handle both large-diameter and small-diameter disks is disclosed in Japanese Patent Laid-Open No. 5-128868.
As described in Japanese Patent Publication No. 8, a disk tray or the like is projected from the disk reproducing apparatus, a disk is placed on this disk tray, and the disk is housed in the disk reproducing apparatus for reproduction.

[0003]

By the way, in the case where the disc tray and the like are projected, the disc tray projects into a narrow space in the vehicle compartment, especially when the disc tray is mounted on a vehicle, which is an obstacle.

In order to solve this problem, a method of pushing the disk into the disk reproducing apparatus was studied instead of the disk tray method. However, if the amount of disc pushing when pushing the disc into the disc playback device is the same for both the large-diameter disc and the small-diameter disc, it is necessary to push the small-diameter disc deeply into the disc-playing device if the value is just right for the large-diameter disc. However, the protruding amount of the small-diameter disc from the disc reproducing device may become too small, resulting in poor operability.

For example, if the diameter of the large-diameter disc is 12 cm, a pushing amount of 7 cm is required, and at that time, the disc protrudes 5 cm outside the disc reproducing apparatus. On the other hand, if a small-diameter disk of 8 cm is inserted with this pushing amount, it will enter 7 cm inside the disk reproducing device, so that only 1 cm will be outside the disk reproducing device, and it will be difficult to grab the disk.

The present invention is intended to solve the above problems, and does not hinder the mounting of the device on a car or the like.
Another object of the present invention is to provide a disc reproducing apparatus capable of handling both large-diameter discs and small-diameter discs with good operability.

[0007]

In order to achieve the above-mentioned object, a disc reproducing apparatus of the present invention comprises a slide member (S) for holding an inserted disc (CD) and the slide member (S). A guide member (G) for guiding along the insertion direction and a driving device (10) for reciprocating the slide member (S) along the guide member (G) are provided.

The slide member (S) has a disc diameter detecting means (M) for detecting the diameter of the inserted disc (CD) and a disc diameter detected by the disc diameter detecting means (M). A slide member pushing means (U) whose position is changed is provided.

The guide member (G) is provided with a large-diameter disk pressed portion (27) and a small-diameter disk pressed portion (28). When the small-diameter disc is inserted, the slide member pressing means (U) presses the small-diameter disc pressed portion (28), and the drive device (10) is activated by this pressing. Then, when the large-diameter disc is inserted, the slide member pushing means (U) changes its position,
The large-diameter disk pressed portion (27) is pressed, and this pressing activates the drive device (10).

[0010]

[Operation] Since the disc reproducing apparatus is configured as described above, when the disc (CD) is inserted, the disc diameter detecting means (M) detects the diameter of the inserted disc (CD) and pushes the slide member. The position of the means (U) is changed according to the disc diameter.

When the large-diameter disc is inserted, the slide member pushing means (U) pushes the large-diameter disc pressed portion (27) provided on the guide member (G). By this pressing, the drive device (10) operates, the slide member (S) moves along the guide member (G), and the slide member (S) is transferred to the reproduction position at the back of the disk reproduction device.

When the small-diameter disc is inserted, the slide member pushing means (U) pushes the small-diameter disc pressed portion (28) provided on the guide member (G). Then, as in the case of the large-diameter disc, the driving device (10) is operated, the slide member (S) is moved along the guide member (G), and is transferred to the reproduction position at the back of the disc reproduction device. It

As described above, the portion to be pressed by the slide member pushing means (U) differs depending on whether the large-diameter disc is inserted or the small-diameter disc is inserted. The amount pushed into (S) can be changed according to the disc diameter.

[0014]

【Example】

(Overall Structure) First, the overall structure of an embodiment of the disc reproducing apparatus of the present invention will be briefly described. FIG. 1 is a schematic perspective view for explaining an embodiment of a disc reproducing apparatus of the present invention. FIG. 2 is a side view of the same device with the chassis removed during disk loading. FIG. 3 is a side view of the same apparatus with the chassis removed during disk reproduction.

1 and 2, the chassis 1 has a large opening on the disk insertion side, a pair of front and rear spring mounting portions 2 are formed on both sides of the upper plate of the chassis 1, and the side plate of the chassis 1 is shown in FIG. A pin engaging recess 3 is formed on the inner surface of the. Then, on the disc insertion side, the spring mounting portions 5 provided in front of and behind the reproducing unit 4 having a turntable and a reproducing head (not shown) are connected to the spring mounting portion 2 of the chassis 1 by the spring 6.
A pin 8 that engages with the pin engaging recess 3 is attached to the side surface of the reproducing unit 4. On the upper surface of the reproduction unit 4, the drive member 10 reciprocates along the disc insertion direction by a drive motor (not shown). This drive member 10 is
An engagement protrusion 11 is formed on the back side, and a cam surface 12 is formed on the disc insertion side subsequent to the engagement protrusion 11.

A guide member G is provided above the reproducing unit 4.
And a shaft 1 provided on the back side of the disc reproducing apparatus.
3, a reproducing unit 4 is rotatably connected to the reproducing unit 4, and springs 14 are urged toward each other on the disc insertion side. On the lower surface of the central portion of the guide member G, the cam surface 12
A protrusion 15 that is in contact with the protrusion 15 is provided downward. The guide member G is formed in a U shape on both sides, and guides the slide member S provided with the front lever M.
An engagement recess 16 that engages with the engagement protrusion 11 is formed on the inner side of the slide member S. The details of the guide member G, the front lever M, and the slide member S will be described later.

(Operation of Overall Structure) In FIG. 2, when the disc CD is inserted into the slide member S and pushed in, the slide member S moves to the inner side of the disc reproducing apparatus. When this movement is detected by detection means (not shown) such as a photo sensor or a leaf switch, a motor (not shown) moves the drive member 10 to the back side, whereby the drive member 1 is driven.
The slide member S engaged with the engagement protrusion 11 formed on the disk 0 is moved to the reproduction position on the inner side of the disk reproducing device, and the disk CD is loaded.

When the slide member S is in the state shown in FIG. 2, the cam surface 12 of the drive member 10 abuts the projection 15 of the guide member G, and the reproducing unit 4 and the guide member G are disc-shaped against the biasing force of the spring 14. The insertion-side tips are driven in directions away from each other. By this drive, the insertion-side tip of the guide member G contacts the upper plate of the chassis 1, and the pin 8 of the reproducing unit 4 is engaged with the pin engaging recess 3 of the chassis 1.
Then, when the slide member S is transferred to the position shown in FIG. 3 by the drive member 10, the inclined surface of the cam surface 12 of the drive member 10 comes to the position of the protrusion 15 of the guide member G, and thus the reproduction unit 4 and The guide member G comes close to the biasing force of the spring 14.

Then, the tip of the guide member G on the insertion side separates from the upper plate of the chassis 1, the pin 8 of the reproducing unit 4 separates from the pin engaging recess 3 of the chassis 1, and the reproducing unit 4 is moved by the spring 6. Since it is elastically supported by the chassis 1, the influence of external vibration can be reduced. Further, due to the proximity of the reproducing unit 4 and the guide member G, the turntable and the reproducing head approach the disk CD, and the disk CD can be clamped and reproduced.

The means for transferring the slide member S to the inner side of the disc reproducing apparatus is described in the above-mentioned Japanese Patent Laid-Open No. 12868/1993.
It is also possible to appropriately use the means for transferring the disc tray described in Japanese Patent No. 8 or the like.

(Description of Guide Member G) FIG. 4 is a view for explaining the guide member of the apparatus, and is a plan view with the chassis removed during disc ejection. FIG. 5 is a cross-sectional view of the vicinity of the clamper of the same device.
The guide member G will be described with reference numerals 20 to 36 with reference to FIGS. 1, 4 and 5.

In FIG. 4, the guide member G is constructed symmetrically, the left side shows a state in which a large diameter disc is inserted, and the right side shows a state in which a small diameter disc is inserted. The state in which the disc is inserted means a state in which no external force is applied after the disc is inserted, and is the same as the state at the time of ejecting.

As shown in FIG. 1, the front end portion 21 of the guide member G is formed by bending it so as to be raised by one step. From the front end portion 21 toward the inner side, a total of 6 pairs of elongated openings 22, 23, 24 are formed. A large opening 26 is formed at the inner side of the outermost large-diameter disc opening 22, a large-diameter disc pressed portion 27 is provided on the disc insertion side, and a small-diameter disc pressed portion 28 is provided immediately behind it. Has been formed. Further, a small-diameter disc contact portion 30 and a large-diameter disc contact portion 31 are provided on the inner side of the opening 26.

Second small-diameter disc opening 23 from the outside
Is formed so as to be inclined slightly inward toward the back, and a locking recess 23a is provided at the tip on the disc insertion side.
The innermost protrusion guide opening 24 is formed straight along the disc insertion direction. Also, FIG.
Further, in FIG. 5, an opening 33 for a clamper is formed in the center of the guide member G, and a clamper pressing spring 35 is attached by a screw 36 in the back.

(Description of Slide Member S, Front Lever M, and Rear Lever U) FIG. 6 is a plan view of a half of the slide member of the apparatus. FIG. 7 is an explanatory diagram of a front lever and a rear lever of the same device. FIG. 8 is an explanatory diagram of a front lever of the device. 4 to 8, the slide member S, the front lever M and the rear lever U will be described with reference numerals 41 to 72.

In FIGS. 6 to 8, the slide member S, the front lever M and the rear lever U are arranged symmetrically in a pair, and the left half is shown. The slide member S has a flat box shape with a large opening on the disc insertion side, and openings for clamping are formed in the upper and lower plates thereof. In FIG. 7, a disc support portion 41 hangs at the tip of the front lever M on the disc insertion side, and a projection 42 guided by the large-diameter disc opening 22 and the small-diameter disc opening 23 shown in FIG. Are formed so as to project upward. The rotating shaft 43 of the front lever M is attached to the shaft attaching portion 44 of FIG. The portion of the front lever M shown in FIG.
In the area 45 which is formed at a lower level in the area,

Further, in FIG. 7, a spring mounting portion 47 is formed inside the rotary shaft 43, and the tip ends of the wire springs 51 fixed to the spring fixing portions 49 and 50 formed on the slide member S are engaged. Then, the disk support portion 41 at the tip of the front lever M
Is biased inward. In FIG. 8, a curved slit 53 is formed on the outer side of the front lever M, and an end 53a of the slit 53 on the disc insertion side has a circular arc centered on the rotation shaft 43. Similarly, the rear end portion 53c at the other end also draws a circular arc centering on the rotary shaft 43, but its radius B is longer than the radius A of the circular arc of the disc insertion side end portion 53a. The intermediate portion 53b gently connects the disc insertion side end portion 53a and the back side end portion 53c.

7 and 8, this slit 5
A rotating shaft 55 of the rear lever U is inserted into the shaft 3. The rotation shaft 55 is formed on both front and back surfaces of the rear lever U, and the rotation shaft 55 on the back side is slidably engaged with the opening 56 of the slide member S shown in FIGS. 6 and 8. Therefore, in FIG. 8, when the front lever M is in the position indicated by the solid line, that is, when the small-diameter disc is inserted, the rotary shaft 55 is located outside the opening 56. Then, the front lever M rotates from the position of the solid line to the position of the chain double-dashed line, and the rotation shaft 55
When the slit 53 engaged with moves, the intermediate portion 53b presses the rotating shaft 55 to move it to a position inside the opening 56. Therefore, when the front lever M is at the position indicated by the chain double-dashed line, that is, when the large-diameter disc is inserted, the rotary shaft 55 is at the inner position of the opening 56. Thus, the front lever M has a function as a disc diameter detecting means.

In FIG. 6, the area 58 of the slide member S, on which the rear lever U is arranged, is formed one step lower than the area 45. By thus forming the regions 45 and 58 gradually lower, the upper surfaces of the front lever M and the rear lever U are flush with the upper surface of the slide member S.

In FIG. 7, a disc support portion 61 similar to the disc support portion 41 of the front lever M is hung at the inner tip of the rear lever U, and an opening 62 shown in FIGS. 6 and 7 is provided.
Of the slide member S, and protrudes below the upper plate of the slide member S. A pin 64 is formed so as to project upward at the outer tip of the rear lever U, and projects into the opening 26 of the guide member G shown in FIG. Further, the rear lever U is biased by the spring 66 that engages with the spring mounting portion 65 of the rear lever U in the direction of clockwise rotation about the rotation shaft 55. The spring 66 is attached to the fixed portion 67 of the slide member S. Then, the disk support portion 61 of the rear lever U
However, it abuts against the insertion side end surface 68 of the opening 62 and is stopped.

5 and 6, the slide member S
A ring portion 71 having a circular center portion is formed on the disc insertion side for mounting the clamper 70. When the slide member S is moved to the reproducing position of the disc reproducing apparatus, the clamper 70 moves above the turntable 17 mounted on the reproducing unit 4. Further, in FIG. 6, four projections 72 (only two on the left side are shown) for preventing the clamper 70 from coming off are formed on both sides of the ring portion 71 so as to project upward. These protrusions 72 are guided by the protrusion guide openings 24 of the guide member G shown in FIG.

(Regarding Pulling of Small Diameter Disc into Disc Playback Device) FIG. 9 is a diagram for explaining a state before the disc is inserted. FIG. 10 is a diagram for explaining a state in which the small diameter disc is inserted. FIG. 11 is a diagram for explaining a state in which the small-diameter disc has been transferred to the reproduction position.

The drawing of the small-diameter disc into the disc reproducing apparatus will be described with reference to FIGS. In FIG. 9, the disc has not been inserted. The front lever M rotates counterclockwise by the urging force of the wire spring 51, and the protrusion 42 thereof is in the locking recess 23a of the small-diameter disk opening 23.

The rotating shaft 55 of the rear lever U is located at the outer end of the opening 56. When the small-diameter disc is inserted, since the rotation range of the front lever M is small, the slit 53 of the front lever M has the rotation shaft 55 at the rear end portion 53c as shown in FIGS. Engage with. Therefore, as shown in FIG. 8, the rotating shaft 55 does not move from the outer end of the opening 56.

Further, in FIG. 9, the pin 6 of the rear lever U is
4 is a position where it abuts against the small-diameter disk pressed portion 28 of the guide member G. Then, similarly to the illustration of FIG. 7, the rear lever U is rotated clockwise by the spring 66 about the rotation shaft 55, and the disc support portion 61 of the rear lever U is inserted into the disc insertion side of the opening 62 of the slide member S. The end face 68 is abutted and stopped.

When the small-diameter disk is inserted from the state shown in FIG. 9, the state shown in FIG. 10 is entered. When the small-diameter disc is inserted, the disc support portion 41 moves outward. Due to this movement, the front lever M rotates clockwise around the rotation shaft 43 against the biasing force of the wire spring 51, and the protrusion 42
Is released from the locking recess 23a. The rear side of the inserted small-diameter disc contacts the disc support portion 61 of the rear lever U. This brings about the state shown in FIG.

When the small-diameter disk is pushed further strongly from the state shown in FIG. 10, the disk support portion 61 moves to the inner side, and the rear lever U rotates counterclockwise about the rotation shaft 55.
Then, the pin 64 of the rear lever U presses the small-diameter disk pressed portion 28 of the guide member G. However, since the guide member G does not move in the disc insertion direction, the rear lever U moves backward by the reaction, and the slide member S, which is its mounting member, also moves backward. Thus, the rear lever U has a function as a slide member pushing means.

By this movement, the slide member S is pulled inward by the drive member 10 shown in FIG. 3, as described in the overall structure. At the time of this withdrawal, the projection 42 of the front lever M is guided by the small-diameter disk opening 23,
Move slightly inward. Due to this inward movement, the small-diameter disc is pulled into the back of the slide member S. And
The state shown in FIG. 11 is obtained.

At the end of this withdrawal, the pin 64 contacts the small-diameter disk contact portion 30 to rotate the rear lever U in the counterclockwise direction, and the disk support portion 61 of the rear lever U is disengaged from the disk. In addition, the clamp and rotation of the disc are prevented from being hindered when the disc is reproduced.

(Regarding withdrawal of a small-diameter disc from the disc reproducing apparatus) Since the disc is moved in a state opposite to the retracted state, its details are omitted. When the slide member S moves toward the disc insertion side in FIG. 10 when the small-diameter disc is pulled out, that is, when the disc is ejected, the pin 64 of the rear lever U contacts the small-diameter disc pressed portion 28 of the guide member G. . Then, the small-diameter disk is pushed forward by the rotation of the rear lever U accompanying the movement of the slide member S thereafter.

(Regarding pulling in of large-diameter disc into disc reproducing apparatus) FIG. 12 is a view for explaining a state in which a large-diameter disc is inserted. FIG. 13 is a diagram for explaining a state in which the large-diameter disc is further inserted. 14
FIG. 14 is a diagram for explaining a state in which the large-diameter disc is further inserted and pushed in as compared with FIG. FIG. 15 is a diagram for explaining a state in which the large-diameter disc has been transferred to the reproduction position.

The drawing of the large-diameter disk into the disk reproducing apparatus will be described with reference to FIGS. 9 and 12 to 15. FIG. 9 shows a state in which the disc is not inserted, and the large-diameter disc and the small-diameter disc are naturally the same. The protrusion 42 of the front lever M is located in the locking recess 23a of the small-diameter disk opening 23, and the pivot shaft 55 of the rear lever U is located at the outer end of the opening 56. Also, pin 6 of the rear lever U
4 is a position where it abuts against the small-diameter disk pressed portion 28 of the guide member G.

When a large-diameter disc is inserted, since the rotation range of the front lever M is large, the slit 53 of the front lever M has a disc insertion side end portion 53a as shown in FIGS. Alternatively, the rotary shaft 55 is engaged with the intermediate portion 53b. Therefore, as also shown in FIG. 8, the rotating shaft 55 moves inward from the outer end of the opening 56 and maintains the inner state during the insertion of the large-diameter disc.

When a large-diameter disk is inserted from the state shown in FIG. 9, the state shown in FIG. 12 is entered. When the large diameter disc is inserted, the disc support portion 41 moves outward. Due to this movement, the front lever M rotates clockwise around the rotation shaft 43 against the biasing force of the wire spring 51, and the protrusion 42
Is released from the locking recess 23a. Then, as described above, the rotating shaft 55 moves inward, and the entire rear lever U on which the rotating shaft 55 is formed moves inward. Along with this movement, the pin 64 of the rear lever U moves inward from the small-diameter disk pressed portion 28 and comes off the small-diameter disk pressed portion 28. This brings about the state shown in FIG.

When a large-diameter disk is further inserted from the state shown in FIG. 12, the state shown in FIG. 13 is entered. The rear side of the inserted large-diameter disc contacts the disc supporting portion 61 of the rear lever U. As described above, since the pin 64 is disengaged from the small-diameter disk pressed portion 28, the large-diameter disk is inserted while the rear lever U is rotated counterclockwise about the rotation shaft 55. . Then, the pin 64 of the rear lever U abuts the large-diameter disk pressed portion 27 this time. This brings about the state shown in FIG.

When a large-diameter disk is further inserted from the state shown in FIG. 13, the state shown in FIG. 14 is entered. When the large-diameter disc is pushed further strongly from the state shown in FIG. 13, the disc support portion 61 moves to the inner side, and the rear lever U rotates counterclockwise about the rotation shaft 55. Then, the pin 64 of the rear lever U presses the large-diameter disk pressed portion 27 of the guide member G. However, since the guide member G does not move in the disc insertion direction, the rear lever U moves backward in response to the reaction, and the slide member S, which is its mounting member, also moves backward, resulting in the state shown in FIG. Become.

By this movement, the slide member S is pulled inward by the drive member 10 shown in FIG. 3, as described in the overall structure. At the time of this withdrawal, the protrusion 42 of the front lever M is guided by the large-diameter disc opening 22 and moves to the inner part of the disc reproducing device.

Then, the state shown in FIG. 15 is obtained. At the end of this withdrawal, the pin 64 contacts the large-diameter disk contact portion 31 to rotate the rear lever U counterclockwise, and the rear lever U
The disk support portion 61 of is removed from the disk. In addition, the clamp and rotation of the disc are prevented from being hindered when the disc is reproduced.

(Regarding the withdrawal of the large-diameter disc from the disc reproducing apparatus) Since the movement is performed in the reverse state of the withdrawal, the details thereof will be omitted. When the disc is pulled out, that is, when the disc is ejected, the slide member S
Is moved toward the disc insertion side, the pin 64 of the rear lever U causes the large-diameter disc pressed portion 27 of the guide member G to move.
Abut. Then, the small-diameter disk is pushed forward by the rotation of the rear lever U accompanying the movement of the slide member S thereafter.

(Modifications) Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-mentioned embodiments, but is within the scope of the gist of the present invention described in the claims. Thus, various changes can be made. A modified embodiment of the present invention is illustrated below.

(1) In the embodiment, the disc diameter detecting means is the front lever M having the disc supporting portion, but other means for detecting the disc diameter may be used. The front lever M also serves as a support portion of the disk, and thus the number of parts can be reduced. (2) In the embodiment, the slide member pushing means is the rear lever U having the disc supporting portion, but other means for pushing the slide member may be used. The above-mentioned front lever M
Similarly, when the rear lever U is used, it also serves as a support portion of the disk, and thus the number of parts can be reduced.

(3) In the embodiment, the large diameter disk is 12c.
The m-diameter CD is a small-diameter disc of 8 cm, but it can be used for other sizes such as 5 cm and 15 cm, and for other types of discs such as laser discs. (4) When a medium-sized disc other than the large-diameter disc and the small-diameter disc is handled by the disc reproducing device, in addition to the large-diameter disc pressed portion and the small-diameter disc pressed portion, the intermediate-disc pressed portion is pressed. It is also possible to provide.

[0053]

According to the present invention, the disc diameter detecting means (M) detects the diameter of the inserted disc (CD), and the operating position of the slide member pushing means (U) is changed according to the disc diameter. The slide member pushing means (U) is used depending on whether the large diameter disc is inserted or the small diameter disc is inserted.
Since the pressed part pressed by is different, the disk (CD)
It is possible to change the amount of pushing into the slide member (S) according to the disc diameter.

For example, a CD with a large-diameter disc of 12 cm
Then, the pushing amount of the large-diameter disc is 8 cm, and the disc is projected 4 cm outside the disc reproducing apparatus. On the other hand, the pushing-in amount of a CD with a small diameter of 8 cm is 5 cm.
As a result, the protrusion amount from the disc reproducing device when the disc is pushed can be set to 3 cm. As a result, it is possible to prevent the amount of protrusion of the large-diameter disc and the small-diameter disc from changing so much that the operability is improved.

[Brief description of drawings]

FIG. 1 is a schematic perspective view for explaining an embodiment of a disc reproducing apparatus of the present invention.

FIG. 2 is a side view of the same apparatus with a chassis removed during disk loading.

FIG. 3 is a side view of the same apparatus with a chassis removed during disk reproduction.

FIG. 4 is a view for explaining a guide member of the same device, and is a plan view with a chassis removed at the time of disc ejection.

FIG. 5 is a cross-sectional view of the vicinity of the clamper of the same device.

FIG. 6 is a plan view of a half of a slide member of the same device.

FIG. 7 is an explanatory diagram of a front lever and a rear lever of the same device.

FIG. 8 is an explanatory diagram of a front lever of the same device.

FIG. 9 is a diagram for explaining a state before a disc is inserted.

FIG. 10 is a diagram for explaining a state in which a small diameter disc is inserted.

FIG. 11 is a diagram for explaining a state in which a small-diameter disc has been transferred to a reproduction position.

FIG. 12 is a diagram for explaining a state in which a large diameter disc is inserted.

FIG. 13 is a diagram for explaining a state in which a large-diameter disc is further inserted.

FIG. 14 is a diagram for explaining a state in which a large-diameter disk is further inserted and pushed in as compared with FIG.

FIG. 15 is a diagram for explaining a state in which a large-diameter disc has been transferred to a reproduction position.

[Explanation of symbols]

 CD disc G guide member M front lever (disc diameter detection means) S slide member U rear lever (slide member pushing means) 10 driving member (driving device) 27 large diameter disc pressed portion 28 small diameter disc pressed portion

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[Procedure amendment]

[Submission date] April 26, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be amended] Detailed explanation of the invention

[Correction method] Change

[Correction content]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention effectively loads a plurality of types of disc recording media having different disc diameters, for example, compact discs (CDs) having a diameter of 12 cm and a diameter of 8 cm into a disc reproducing unit inside the apparatus body. The present invention relates to a disc reproducing device which is excellent in handleability.

[0002]

2. Description of the Related Art Recently, a disc reproducing apparatus for optically reproducing information recorded as a pit train on a disc-shaped recording medium (disc) has been remarkably popular. This kind of disc has
There are so-called laser discs (LD) with a diameter of 30 cm, compact discs (CD) with a diameter of 12 cm or 8 cm, etc., and various devises have been made as a disc reproducing apparatus to cope with a plurality of types of discs having different diameters. ing.

By the way, in a top loading type (lid type) device in which the upper lid of the main body of the apparatus is opened and the disk is directly mounted on the turntable provided inside the apparatus, the difference in the diameter of the disk causes almost no problem. On the other hand, in a tray type device in which a tray is provided so as to be movable between a disc reproducing position inside the device body and a disc inserting / removing position protruding to the outside of the device body, and a disc is placed on the tray to convey the disc. For example, as disclosed in Japanese Unexamined Patent Publication No. 5-128688, a plurality of circular recesses corresponding to the disc diameter are formed coaxially in multiple stages on the tray surface so as to cope with a plurality of discs having different diameters. Has been done.

There is also a roller type device which conveys a disc inserted through a disc insertion / removal opening formed on the front surface of the main body of the device to a disc reproducing position by using a roller incorporated therein. In this roller type device, as disclosed in, for example, Japanese Patent Laid-Open No. 4-195855 and Japanese Patent Laid-Open No. 5-298802, a pair of levers that come into contact with the peripheral edge of the disk inserted from the disk insertion / ejection opening is opened. By controlling the angle according to the diameter of the disk, the position of the disk with respect to the turntable is adjusted to cope with the difference in the disk diameter.

[0005]

By the way, although the above-mentioned tray type device has a relatively simple structure, when it is applied to an on-vehicle disc reproducing device, the equipment location is a narrow space near the driver's seat. In many cases, the protrusion of the tray from the main body of the device is likely to be a problem. On the other hand, the roller type disc reproducing apparatus does not have the problem of the tray type described above because it simply inserts and removes the disc through the disc insertion / removal opening provided on the front surface thereof, and is suitable as an on-vehicle apparatus.

However, it is undeniable that the roller type device generally has a large size and a complicated structure. Moreover, in the roller type apparatus, when the tip of the disc inserted through the disc insertion / ejection port reaches a predetermined position, it is usually detected and the loading operation is started. For this reason, in the case of a disk with a diameter of 12 cm, the loading operation can be started, for example, when it is inserted up to about half of that, but in the case of a disk with a diameter of 8 cm, most of them are not inserted deeply until they are hidden inside the main body of the device. And the loading operation cannot be started. In addition, there is a problem that the opening angle of the lever cannot be controlled by judging the diameter of the disc unless the disc is inserted to a certain depth.

The fact that a disk having a diameter of 8 cm must be inserted deeply in this manner is a factor that makes the operability and handleability very poor.

The present invention has been made in view of the above circumstances, and an object thereof is operability capable of reliably and effectively loading a plurality of types of disks having different diameters without using a tray. -To provide a disc reproducing device having a simple structure and excellent handleability.

[0009]

DISCLOSURE OF THE INVENTION A disc reproducing apparatus according to the present invention includes a slide member which is supported by a guide member and is movable between a disc reproducing position and a disc inserting / removing position along a disc surface. A first lever that is pressed by the outer peripheral edge portion of the disc inserted into the slide member to move and displace in a direction intersecting with the disc insertion direction according to the diameter of the disc. Accordingly, the engaging position with the slide member is changed by engaging with the first lever which is displaced according to the movement, and one end is pressed by the outer peripheral edge portion of the inserted disk, and the engaging position with the slide member is used as a fulcrum. A second lever that rotates as a guide is provided. On the other hand, the guide member is rotated around the engagement position with the slide member as a fulcrum when the slide member is at the disc insertion / removal position. The pressed portion that engages with the other end of the second lever and restricts its rotation to move the second lever to the disc reproduction position side is changed and set according to the diameter of the disc. It is characterized in that it is provided so as to correspond to the engagement position between the two levers and the slide member.

Further, when the slide member is moved toward the disc reproducing position side by the rotation of the second lever which is in contact with the pressed portion, the slide member is reproduced from the disc inserting / removing position. It is characterized in that it has a function of activating a driving device for moving it to a position.

Further, the first lever and the second lever are provided symmetrically in pairs in a direction perpendicular to the disc insertion direction, and are elastically biased toward the center side of the slide member. In addition, it has a function of positioning the disc inserted in the slide member at a predetermined position.

Further, when the slide member is located between the disc inserting / removing position and the disc reproducing position, it selectively engages with the edge portion of the opening provided in the guide member according to the diameter of the disc, and the first member It is characterized in that an engaging portion for holding the posture of the lever is provided.

Further, the first lever has an engaging portion which engages with a part of the guide member and prohibits the movement of the slide member when it is pressed by the outer peripheral edge portion of the disk inserted in the slide member and is not displaced. Is provided.

Further, when the slide member is moved from the disc reproducing position to the disc inserting / removing position, the second lever is pivoted in the opposite direction with the other end, which comes into contact with the pressed portion and is restricted in movement, as a fulcrum. And one end of the slide member has a function of pushing the disk housed in the slide member to the outside.

[0015]

According to the disc reproducing apparatus constructed as described above, when the disc is inserted into the slide member, the first lever moves and displaces in accordance with the diameter of the disc member, and accordingly, the second lever slides with the slide member. The engagement position is changed, and the rotation fulcrum of the second lever that is rotated by being pressed by the peripheral edge of the disk is changed according to the disk diameter. Then, the second lever selectively abuts against the pressed portion of the guide member that is set in advance according to the disk diameter and rotates while being restricted in rotation. By the rotation of the rotation-restricted second lever, the slide member is pressed and moved to the disk reproduction position side, and the drive device is activated.

Therefore, the movement condition of the slide member can be easily mechanically changed by rotating the second lever whose rotation fulcrum and its rotation range are changed according to the disk diameter. It is possible to set the insertion amount of the disk required for the moving drive (starting of the loading mechanism) according to the diameter of the disk, and it is possible to improve the handleability.

Further, since the disc inserted into the slide member is positioned at a predetermined position by the first lever and the second lever which are biased inward, the disc loading position can be achieved regardless of the disc diameter difference. Can be defined reliably.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the overall structure of a disc reproducing apparatus according to an embodiment of the present invention will be briefly described.

FIG. 1 is a perspective view showing the schematic construction of the embodiment apparatus, and FIGS. 2 and 3 are side views schematically showing the internal structure thereof. 2 shows a state when the disc is loaded, and FIG. 3 shows a state when the disc is reproduced.

In FIGS. 1 and 2, the metal chassis 1 forming the main body of the apparatus is formed by bending both sides of the upper plate downward.
It has a shape with a large opening on the disc insertion side. On both sides of the top plate of this chassis 1, a pair of front and rear spring mounting parts 2
Are formed, and pin engaging recesses 3 are formed on the inner surfaces of both side plates. Inside the chassis 1, a reproducing unit 4 having a turntable and an optical head (not shown) is mounted, and a spring stretched between a spring mounting portion 5 provided at the front and rear of the chassis and a spring mounting portion 2 of the chassis 1. It is suspended via 6 and is movably provided.

A pin 8 engageable with the pin engaging recess 3 is attached to the side surface of the reproducing unit 4. Further, on the upper surface of the reproducing unit 4, a drive member 10 which is reciprocally moved in the disc insertion direction by a drive motor (not shown) is provided. An engagement protrusion 11 that engages with a slide member S, which will be described later, is provided on the inner side of the drive member 10, and a cam surface 12 is formed on the subsequent portion of the disc insertion side.

On the other hand, a guide member G is provided above the reproduction unit 4 so as to be positioned between the reproduction unit 4 and the upper plate of the chassis 1. The guide member G and the reproducing unit 4 are vertically rotatably connected to each other via a shaft 13 in the inner portion of the disc reproducing device, and are biased toward each other by a spring 14 on the disc inserting side. . Further, on the lower surface of the central portion of the guide member G, a projection 15 that contacts the cam surface 12 is provided so as to project downward.

Also, both sides of the guide member G are "ko".
The slide member S is movably provided on the inner side thereof so as to be guided and supported by the both side portions. The engagement protrusion 11 of the drive member 10 engages with the engagement recess 16 provided in the inner portion of the slide member S and moves integrally with the slide member S. The details of the guide member G and the slide member S will be described later.

When the disc CD is inserted into the slide member S and pushed in, the slide member S is slightly moved to the inner side of the disc reproducing device. This movement is detected by detection means (not shown) such as a photo sensor or a leaf switch, and a motor (not shown) is activated to move the drive member 10 to the back side. This allows the drive member
The slide member S engaged with the engagement protrusion 11 of 10 is transferred to the disc reproducing position on the inner side of the disc reproducing device, and the disc housed in the slide member S is loaded at the reproducing position.

In the state shown in FIG. 2 in which the slide member S is in the eject position (disc insertion / removal position), the cam surface 12 of the drive member 10 is in contact with the projection 15 of the guide member G, and the reproduction unit 4 and the guide member are in contact with each other. G is against the urging force of the spring 14 and the tips of the disc insertion sides thereof are separated from each other. The guide member G is in contact with the upper plate of the chassis 1, and the pin 8 of the reproducing unit 4 has the pin engaging recess 3 of the chassis 1.
Is engaged with.

When the slide member S is transferred from this state to the disk reproducing position in the inner portion shown in FIG. 3, the inclined surface of the cam surface 12 of the driving member 10 comes to the position of the protrusion 15 of the guide member G, The reproducing unit 4 and the guide member G are springs 14
Closer due to the urging force of. Then, the guide member G pushed upward by the reproduction unit 4 is separated from the upper plate of the chassis 1, and the pin 8 of the reproduction unit 4 is further attached to the chassis 1.
Is disengaged from the pin engaging recess 3 of. The reproducing unit 4 is elastically supported inside the chassis 1 by the spring 6 while being integrated with the guide member G. At this time, due to the proximity of the reproducing unit 4 and the guide member G, the disk accommodated in the slide member S is mounted on the turntable and clamped, and is used for reproduction by the optical head.

As the means for moving the slide member S to the disk reproducing position, the means for transferring the disc tray described in the above-mentioned Japanese Patent Laid-Open No. 5-128688 can be appropriately adopted.

The guide member G is constructed as shown in FIG. The guide member G has a bilaterally symmetrical structure (shape), and the slide member S is housed inside thereof. The left half of FIG. 4 shows a state where a large-diameter disc is inserted into the slide member S, and the right half shows a state where a small-diameter disc is inserted. Here, the state in which the disc is inserted means a state in which the disc is merely inserted into the slide member S and no external force is applied.

The front end portion 21 of the guide member G is formed by bending it so as to be raised by one step as shown in FIG. On the upper surface of the guide member G, three pairs of elongated openings 22, 23, 24 are bored from the front end portion 21 toward the inner side in total of six.

A larger opening 26 is formed behind the outermost large-diameter disk opening 22. A large-diameter disk pressed portion 27 is formed on the disk insertion side of the opening 26, and a small-diameter disk pressed portion is formed immediately behind it.
28 is notched. Further, on the inner side of the opening 26, a small-diameter disc contact portion 30 and a large-diameter disc contact portion 31 are provided, respectively. The pressed portions 26, 27 and the abutting portions 30, 31 are provided by being displaced in the width direction of the guide member G according to the diameter of the disc inserted into the slide member S. Will be described later.

The second small-diameter disc opening from the outside
The reference numeral 23 is formed so as to be inclined slightly inward toward the back, and a locking recess 23a is provided at the tip end position on the disc insertion side thereof. The innermost protrusion guide opening 24 is formed straight along the disc insertion direction. Further, an opening 33 for a clamper is formed at the center of the guide member G, and a clamper pressing spring 35 is attached to the back of the opening 33 with a screw 36. The functions of these openings 23, 24 will also be described later.

Next, the slide member S provided movably inside the guide member G will be described. FIG. 6 is a plan view showing only a half of the slide member S having a symmetrical structure. 7 is a perspective view showing the coupling relationship between the first lever M and the second lever U attached to the slide member S, and FIG. 8 is a diagram for explaining the operation of the first lever M.

The slide member S is in the shape of a flat box having a large opening on the disc insertion side, and openings for clamping are formed on the upper and lower plates thereof. On the upper plate of the slide member S, a pair of first lever M and second lever U are symmetrically arranged in pairs.

The first lever M is provided with a disc support portion 41 hanging down from the tip on the disc insertion side, and the large-diameter disc opening 22 and the small-diameter disc opening 23 are provided in the vicinity of the rear portion thereof. A protrusion 42 that is selectively engaged with one side and guided is formed so as to project upward. The rotation shaft 43 of the first lever M is rotatably attached to a shaft attachment portion 44 provided on the upper plate of the slide member S as shown in FIG. As shown in FIG. 6, a portion of the first lever M on the disc insertion side of the rotation shaft 43 is an area of the upper plate of the slide member S formed one step lower than the upper plate surface by the thickness of the first lever M. It is supposed to move over 45.

Further, as shown in FIG. 7, a spring mounting portion 47 is formed at a portion inside the rotation shaft 43 of the first lever M. The tip of the wire spring 51 fixed to the spring fixing portions 49 and 50 of the slide member S is engaged with the spring mounting portion 47,
The force of the wire spring 51 urges the first lever M so that the front end side of the first lever M forming the disk support portion 41 is rotationally displaced inward.

The rotating shaft 43 at the rear end of the first lever M
A curved slit 53 is formed on the outer side of the slit as shown in FIGS. 7 and 8. This slit 53 is a rotary shaft 43.
Disk insertion side end consisting of an arc of radius A centered at
Similarly, 53a includes a rear end portion 53c, which is an arc having a radius B larger than the radius A, centered on the rotating shaft 43, and an intermediate portion 53b that gently connects these.

On the other hand, the rotary shaft 55 of the second lever U is inserted into the slit 53. The rotation shaft 55 is formed so as to project on both front and back surfaces of the second lever U, and the rotation shaft 55 on the back side is positionally regulated in the opening 56 of the slide member S as shown in FIGS. 6 and 8. It is slidably engaged.
When the first lever M is in the position shown by the solid line in FIG. 8, that is, when the small diameter disc is inserted, the rotary shaft 55 is guided by the rear end portion 53c of the slit 53 and is positioned outside the opening 56. There is. Then, when the first lever M rotates from the position indicated by the solid line to the position indicated by the chain double-dashed line, and the slit 53 engaged with the rotation shaft 55 moves accordingly, the intermediate portion 53b thereof.
Presses the rotating shaft 55 to move it to a position inside the opening 56.
Therefore, when the first lever M is at the position indicated by the chain double-dashed line, that is,
When the large-diameter disc is inserted, the rotation shaft 55 is moved to the inner position of the opening 56. Thus, the first lever M
The second according to the diameter of the disc inserted in the slide member S
The position of the rotary shaft 55 of the lever U is displaced to fulfill the function as a disc diameter detecting means.

The region 58 of the upper plate of the slide member S in which the second lever U is arranged has a first area as shown in FIG.
It is formed one step lower than the arrangement area 45 of the lever M by the thickness of the second lever U. By thus forming the region 45 and the region 58 gradually lower than the upper surface of the slide member S, the first lever M and the second lever U are mounted within the range of the plate thickness of the slide member S, and The top surfaces of the are aligned.

On the other hand, a disc support portion 61 similar to the disc support portion 41 of the first lever M is provided at the inner tip of the second lever U so as to hang down. As shown in FIGS. 6 and 7, these disk support portions 41 and 61 project inside the slide member S through an opening 62 provided in the upper plate of the slide member S. Then, the disk is supported by coming into contact with the outer peripheral edge of the disk inserted into the slide member S and displacing inward. Further, the pin 64 formed so as to project upward at the outer tip of the second lever U has the guide member G shown in FIG.
Projects into the opening 26 of the.

The second lever U has a spring mounting portion 65.
A spring 66 that engages with is pivotally biased in the direction in which the disc support portion 61 is displaced inwardly about the pivot shaft 55. The spring 66 is attached to the fixed portion 67 of the slide member S. Then, in the ejecting state of the disc (the state in which the disc is not inserted), the second lever U is in a state of being rotated until the disc supporting portion 61 of the second lever U is in contact with the insertion side end face 68 of the opening 62. ing.

A ring portion 71 for mounting the clamper 70 is formed on the disc insertion side of the upper plate of the slide member S. Clamper provided on this ring portion 71
The reference numeral 70 moves with the slide member S, and when the slide member S is transferred to the reproducing position of the disc reproducing apparatus, it is positioned above the turntable 17 mounted on the reproducing unit 4 so as to face the turntable 17. The clamper 70 contacts the clamper pressing spring 35 and is pressed downward. When the disk is placed on the turntable and lifted in the slide member S, the disk is pressed down and the disk is slid. The member S is clamped in a non-contact manner.

Further, on both sides of the ring portion 71, four protrusions 72 (only two on the left side are shown) for preventing the clamper 70 from coming off are formed so as to project upward. These protrusions 72 are guided by the protrusion guide openings 24 of the guide member G shown in FIG.

Next, the operation of the embodiment apparatus constructed as described above will be described.

FIG. 9 is a diagram showing a state before the disc is inserted, FIG. 10 is a diagram showing a state where a small-diameter disc is inserted, and FIG. 11 is a diagram showing a state where the small-diameter disc is transferred to a disc reproducing position.

When the disc is not inserted, the first lever M is rotated counterclockwise by the urging force of the wire spring 51 as shown in FIG. 9, and the protrusion 42 is located in front of the small-diameter disc opening 23. It is located in a locking recess 23a provided at the edge. At this time, the rotation shaft 55 of the second lever U moves toward the rear end portion 53c of the slit 53.
Is located at the outer end of the opening 56. And FIG.
As shown in FIG. 3, the pin 64 of the second lever U is in a position where it abuts against the small-diameter disk pressed portion 28 of the guide member G. Further, the second lever U is rotated in the clockwise direction in the figure by the spring 66 about the rotation shaft 55 as an axis, and the base portion of the disc support portion 61 is brought into contact with the disc insertion side end surface 68 of the opening 62 of the slide member S. It is in a state.

When a small-diameter disc is inserted into the slide member S in the state shown in FIG. 9, the disc support portion 41 of the first lever M abuts against the outer peripheral edge of the disc and is pushed outward so that the first lever M moves. The state shown in FIG. 10 shifts against the urging force of the wire spring 51. The rotation range of the first lever M at this time is small because the disc diameter is small, and the protrusion 42 is disengaged from the locking recess 23a and is displaced to a position where it can be engaged with the small-diameter disc opening 23. is there. Further, in this state, the rotation shaft 55 of the second lever U is kept engaged with the rear end portion 53c of the slit 53 of the first lever M, so that the rotation shaft 55 as shown in FIG. Does not move from the outer edge of opening 56.

When the smaller-diameter disc is further pushed in from this state, the outer peripheral edge portion of the disc abuts against the disc supporting portion 61 of the second lever U at the inner portion thereof, and the state shown in FIG. 10 is obtained.

When the small-diameter disc is pushed in from the state shown in FIG. 10, the disc is pushed by the disc and the disc supporting portion 61 moves to the back side, and the second lever U pivots counterclockwise about the pivot shaft 55. To do. The second lever U centered around this rotation shaft 55
When the pin 64 of the second lever U comes into contact with the pressed portion 28 for the small-diameter disk of the guide member G by the rotation of, the rotation is restricted. Then, the second lever U rotates about the pin 64 which is brought into contact with the small-diameter disk pressed portion 28 and whose rotation is restricted, and guides the slide member S through the opening 56 with which the rotation shaft 55 is engaged. The member G is pressed and moved toward the inner side, that is, toward the disk reproducing position side.

The movement of the slide member S in accordance with the rotation of the second lever U detects the insertion of the disk and the motor is started, and the movement of the driving member 10 draws the slide member S into the inner portion of the guide member G. . Further, when the slide member S is retracted, the projection 42 of the first lever M is guided by the small-diameter disk opening 23 and moved and displaced slightly inward. Due to the inward movement displacement of the first lever M, the small-diameter disc is pulled into the back of the slide member S,
It is centered with respect to 70 and becomes the state shown in FIG.

When the slide member S is retracted,
The pin 64 comes into contact with the small-diameter disk contact portion 30 to slightly rotate the second lever U counterclockwise. This second lever U
When the disc is rotated, the disc support portion 61 is detached from the peripheral portion of the disc, and is retracted outside so as not to interfere with the clamp of the disc on the turntable and the rotation thereof when the disc is reproduced.

On the other hand, the ejection of the small-diameter disc from the disc reproducing apparatus is performed by moving the driving member 10 in the reverse direction to move the slide member S from the disc reproducing position to the eject position. In this case, the movement of the slide member S first causes the pin 64 of the second lever U to move away from the small-diameter disk contact portion 30 of the guide member G.
The lever U is rotated clockwise by the urging force of the spring 66, and the disc support portion 61 abuts the outer peripheral edge portion of the small diameter disc to support the disc. As a result, the small-diameter disc moves together with the slide member S toward the disc insertion position side.

Then, with the movement of the slide member S, the second
The pin 64 of the lever U contacts the pressed portion 28 for the small-diameter disk, and the movement of the pressed portion 28 is restricted.
When the second lever U continues to move, the second lever U rotates about the pin 64 that is in contact with the small-diameter disk pressed portion 28 as a fulcrum. By the rotation of the second lever U, the small-diameter disc is pressed by the disc supporting portion 61 and pushed forward. As a result, the small-diameter disc is ejected to a state in which the small-diameter disc protrudes from the disc insertion opening by about half as shown in FIG.

On the other hand, loading of a large-diameter disc into the disc reproducing apparatus is performed as follows. Incidentally, FIG.
FIG. 13 is a diagram showing a state at the time of starting the insertion of the large diameter disc, and FIG. FIG. 14 is a diagram showing a state in which the large-diameter disc has been pushed in after the insertion of the large-diameter disc has been completed, and FIG.

When the disc is not inserted, the projection 42 of the first lever M is in the engaging recess 23a of the small diameter disc opening 23 as shown in FIG. 55 is located at the outer end of the opening 56. The pin 64 of the second lever U is in a position where it abuts against the pressed portion 28 for the small diameter disc of the guide member G.

When a large-diameter disk is inserted in this state, the first lever M is pressed by bringing the disk support portion 41 at the tip thereof into contact with the outer peripheral edge portion of the large-diameter disk, and the wire spring 51.
It rotates in the clockwise direction in the figure about the rotation shaft 43 against the urging force of, and is largely displaced outward as shown in FIG. By the rotation of the first lever M, the rotation shaft 55 engaged with the slit 53 is pushed by the disc insertion side end portion 53a of the slit 53 and is displaced from the outer end of the opening 56 to the inner position. Further, when the first lever M is rotated outward, the projection 42 is disengaged from the locking recess 23a and the large-diameter disk opening 22 is formed.
Is brought to a position where it can be engaged with.

As the first lever M rotates, the second lever U moves inwardly of the rotation shaft 55, so that the entire second lever U moves inward. Along with the movement of the second lever U, the pin 64 provided at the inner part of the second lever U is pressed against the small-diameter disk.
It disengages from the engagement position with 28, moves inward, and becomes the state shown in FIG.

When the large-diameter disk is further inserted from this state toward the back side, the back side of the inserted large-diameter disk is the second side.
The lever U is brought into contact with the disc supporting portion 61, and is pressed and rotated. At this time, as described above, the pin 64 is already disengaged from the engagement position with the pressed portion 28 for the small diameter disc, so that the second lever U is rotated by the rotation shaft as the large diameter disc is inserted.
Rotate counterclockwise in the figure around 55. The rotation of the second lever U is performed against the biasing force of the spring 66.

With the rotation of the second lever U, however, as shown in FIG.
As shown in FIG. 3, the pin 64 has a large-diameter disk pressed portion 27.
When contacted with, the large-diameter disk pressed portion 27 restricts the rotation of the second lever U about the rotation shaft 43.

When the large-diameter disc is inserted further toward the back from the state shown in FIG. 13, the disc support 61 is pushed by the peripheral portion of the large-diameter disc to the back side, and the second lever U rotates. Rotate counterclockwise around the shaft 55. However, at this time, since the pin 64 of the second lever U abuts against the large-diameter disk pressed portion 27 of the guide member G and is restricted in rotation,
The lever U rotates about the contact point between the large-diameter disk pressed portion 27 and the pin 64 as a fulcrum. As a result, the second lever U
The sliding member S having the opening 56 engaged with the rotating shaft 55 of FIG. 1 is displaced by the movement of the rotating shaft 55 as the second lever U rotates.
As shown in 4, it moves toward the back.

By the movement of the slide member S, the insertion of the disc into the slide member S is detected, the motor is activated, and the drive member 10 is driven to move. By the movement of the driving member 10, the slide member S is drawn into the inner part of the guide member G as shown in FIG. At the time of this withdrawal, the protrusion 42 of the first lever M engages with the large-diameter disc opening 22 and moves to the back of the disc reproducing apparatus. By the guide of the protrusion 42 by the opening 22 for the large-diameter disk, the first lever M
Thus, the large-diameter disk is supported by the first lever M and is transferred to the disk reproducing section at the back of the guide member G together with the slide member S.

When the pulling-in of the large-diameter disc is completed, the pin 64 comes into contact with the large-diameter disc abutting portion 31 and the second
The lever U is further rotated counterclockwise. By the rotation of the second lever U, the disc support portion 61 is detached from the peripheral portion of the large-diameter disc, and is retracted so as not to interfere with the clamp of the disc on the turntable and the rotation thereof when the disc is reproduced.

Ejection of the large-diameter disc loaded in the disc reproducing section in this manner is performed as follows.

When the drive member 10 is moved in the opposite direction in accordance with the eject operation, the pin 64 first separates from the large-diameter disk contact portion 31 as the slide member S moves, and the second lever U causes the spring 66 to move. It is rotated inward by the urging force of. By the rotation of the second lever U, the disc support portion 61 of the second lever U
Comes into contact with the peripheral portion of the large-diameter disc, and holds the large-diameter disc together with the disc supporting portion 41 of the first lever M.

In this state, the slide member S moves to the first and second positions.
It moves together with the levers M and U toward the disc insertion position. When the slide member S reaches immediately before the disc insertion position, the pin 64 of the second lever U comes into contact with the large-diameter disc pressed portion 27 and its movement is restricted, so that the second lever U moves further inward. It is turned toward. This second lever U
By the rotation of, the large-diameter disk is pushed by the disk support portion 61 of the second lever U, slightly pushed out toward the front of the apparatus and ejected, and the state shown in FIG. 13 is obtained.

In this way, when the large-diameter disk is projected from the disk insertion opening by about half, when the large-diameter disk is grasped by the lever and taken out, the first lever M moves inward by the force of the spring 51. And returns to the initial state shown in FIG.

The configuration and operation of the embodiment apparatus have been described above.

To summarize the features of this embodiment, the slide member S supported by the guide member G is movably provided between the disc reproducing position and the disc inserting position. A first lever M whose rotation angle is changed according to the diameter of the disk inserted into the member S is rotatably provided with the rotation shaft 43 as a fulcrum, and is engaged with the first lever M to The second lever U in which the position of the rotation fulcrum (position of the rotation shaft 55) is changed according to the rotation angle of the lever M, that is, according to the diameter of the inserted disc.
Is provided, and the outer peripheral edge portion of the disc inserted into the slide member S is supported by the disc support portions 41 and 61 provided at one ends of the first and second levers M and U. .

Then, the guide member G is selectively engaged with a pin 64 provided at the other end of the second lever U whose rotation fulcrum is changed according to the diameter of the disc to restrict the rotation thereof. When the second lever U further rotates, the second lever U
The point is that pressed portions 26, 27 for moving the rotating shaft 55 of the lever U itself to the disc reproducing position side are provided according to the disc diameter. The second lever U is moved and displaced by the selective engagement between the pin 64 and the pushed portions 26 and 27, and the slide member S is moved and displaced accordingly, thereby activating the loading mechanism and driving member. The feature is that 10 is moved to move the slide member S to the disc reproducing position.

According to this structure, the slide member S
Since the opening angle (rotation angle) of the first lever U and the rotation point and the rotation angle of the second lever M are controlled according to the diameter of the disc inserted in the disc, even if the disc diameter is different. , The slide member S by securely supporting the outer peripheral edge of the disc.
It can be pulled to a predetermined position inside the disc and transferred to the disc reproducing position.

Moreover, the rotation fulcrum position of the second lever U (the position of the rotation shaft 55 with respect to the slide member S) is changed in accordance with the diameter of the inserted disc, and the rotation regulation of the rotation of the second lever U is restricted. Since the positions (the pressed portions 26, 27) are changed, the timing of starting the movement of the slide member S with respect to the insertion amount of the disc can be changed according to the disc diameter. Therefore, regardless of the diameter of the disc, the loading mechanism can be activated at the time when the disc is inserted in about half, and the handleability of the disc can be improved. Further, during the ejecting operation, the disc is pushed out by the rotation of the second lever U whose rotation fulcrum position is changed according to the disc diameter. Therefore, even if the disc has a small diameter, it can be easily grasped by half. It can be projected to the outside to some extent, and the handleability of the disc can be further enhanced.

When the disc is not inserted, the first lever M is biased by the biasing force of the spring 51 toward the inner side, and the pin 42 provided on the first lever M is engaged with the locking recess 23a. Since they are in opposite positions, in this state, the engagement of the pin 42 and the locking recess 23a prevents the first lever M from moving to the inner part, that is, the slide member S from moving to the disc reproducing position side. Has been done. Therefore, unless the disc is inserted and the first lever M is rotationally displaced outward, the loading mechanism does not operate, so that the control operation can be prevented.

Moreover, when the slide member S moves, the first
Since the pin 42 provided on the lever M is selectively engaged with the openings 22 and 23 for the large-diameter disc or the small-diameter disc and kept in the respective predetermined rotational postures, the disc is irrespective of the disc diameter. The first lever M and the second lever U can be surely held and can be prevented from coming off. Further, when the slide member S reaches the disc reproducing position, the pin 64 provided on the second lever U is brought into contact with the contact portions 30, 31 of the guide member G to rotate the second lever U, By the second
Since the disc is mounted on the turntable with the lever U separated from the disc,
Further, the second levers M and U are not disturbed.

The present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the present invention described in the claims.

(1) In the embodiment, the disc diameter detecting means is the first lever M having the disc supporting portion,
Other means for detecting the diameter of the disc may be used. By the way, when the disc diameter is detected using the first lever M, the number of parts can be reduced because the first lever M also serves as a support portion of the disc.

(2) In the embodiment, the slide member pushing means is the second lever U having the disk supporting portion, but other means for pushing the slide member may be used. By the way, when the second lever U is provided with a sliding member pushing-in function similarly to the above-mentioned first lever M, the second lever U also serves as a support portion of the disk, so that the number of parts can be reduced. Become.

(3) In the embodiment, the large diameter disc is 12 cm.
In the above CD, the small-diameter disc is an 8 cm CD, but it can be configured to be able to cope with other discs having different diameters such as a laser disc.

(4) When an intermediate size disc other than the large-diameter disc and the small-diameter disc is handled by the disc reproducing device, the medium-diameter disc is used in addition to the large-diameter disc pressed portion and the small-diameter disc pressed portion. It is also possible to provide a pressed portion.

[0078]

As described above, according to the present invention, the disk inserted into the slide member along the disk surface can be inserted into the slide member regardless of its diameter, for example, by inserting about half of the disk. Can be pulled to a predetermined position and transferred to a disc reproducing position. Moreover, the amount of protrusion of the disc at the time of ejection can be about half that of the disc regardless of the disc diameter. Therefore, it is possible to simplify the operation of loading and unloading the disc with respect to the apparatus body, and it is possible to sufficiently improve the handleability of the disc.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic structure of a disc reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a side view showing an internal structure of the device in an eject state.

FIG. 3 is a side view showing an internal structure of the apparatus in a reproduction state.

FIG. 4 is a plan view showing a configuration of a guide member in the same device.

FIG. 5 is a cross-sectional view showing the structure of the clamper of the same device.

FIG. 6 is a plan view showing the structure of a slide member of the device.

FIG. 7 is a perspective view showing a relationship between a first lever M and a second lever U of the same device.

FIG. 8 is a plan view showing the configuration of a first lever M of the same device.

FIG. 9 is a diagram showing a state in which a disc is not inserted in the device.

FIG. 10 is a view showing a state in which a small-diameter disc is inserted.

FIG. 11 is a diagram showing a loading completion state of a small diameter disc.

FIG. 12 is a view showing a state where a large-diameter disc is inserted.

FIG. 13 is a view showing a state where a large-diameter disc is being inserted.

FIG. 14 is a view showing a state where the large-diameter disc has been inserted.

FIG. 15 is a diagram showing a loading completion state of a large-diameter disc.

[Description of Reference Signs] CD ... Disc, G ... Guide member, M ... First lever (disc diameter detecting means), S ... Slide member, U ... Second lever (slide member pushing means), 10 ... Driving member (driving device) ) 、
27 ... Pressed part for large diameter disc, 28 ... Pressed part for small diameter disc.

Claims (1)

[Claims] 1. A slide member (S) for holding an inserted disc (CD), a guide member (G) for guiding the slide member (S) along a disc insertion direction, and the slide member (S). A disc reproducing apparatus comprising a driving device (10) for reciprocating the disc along a guide member (G), wherein a disc diameter detecting means (M) for detecting a diameter of an inserted disc (CD), and the disc diameter. The slide member (S) is provided with a slide member pushing means (U) whose position is changed by the disc diameter detected by the detecting means (M), and the slide member pushing means (U) is operated by inserting a large diameter disc. Then, the large-diameter disk pressed portion (27) that presses and activates the drive device (10) and the slide member pressing means (U) operate by inserting the small-diameter disk. A disc reproducing apparatus, characterized in that a small-diameter disc pressed portion (28) for pressing the drive device (10) is provided on the guide member (G).