JP2000090531A - Disk player - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk player arranged to prevent the disk from flying out at the time of ejecting a 12 cm CD in the disk player usable with a 8 cm CD and the 12 cm CD and also to be capable of surely returning a disk stopper to the position of the 8 cm CD. SOLUTION: At the time of ejecting the 12 cm CD, detecting rods 30 31 are pushed with the eject force of the CD ejected by a roller to rock a 1st disk detecting lever 28, and a lock slider 125 is moved by the pressurizing part 56, then a lever return 102 is rotated against an inversion spring 106, then a changeover slider 110 is moved to the side of the initial position by the tip part. Even though the inversion spring is inverted in this process, the CD is already carried away at the position unpressurized by stopper pins 123.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc player for a compact disc (CD), and more particularly to a disc transport device for loading a disc into a disc player and ejecting the disc.
The present invention relates to a disc player using 8 cm CD and 12 cm CD discs, which can appropriately carry out 12 cm CD ejection.

[0002]

2. Description of the Related Art A disc player for a compact disc (CD), particularly a 1DI
N-type disc players adopt a front-loading format. Even in such a disc player, a small-diameter 8 cm CD and a large-diameter 12 cm CD are used.
One that can use both cmCD discs has been developed and used. In such a disc player, when loading a disc into the disc player, when the user inserts a predetermined amount from the disc insertion slot, the disc detection means detects the disc insertion, and the two upper and lower discs provided in the insertion slot portion are provided. Or one lower transport roller moves to the upper plate side to pinch the disk, and the transport roller rotates in the loading direction to transport the disk onto the turntable, and then the lower transport roller Evacuate downward.
Next, the arm clamp is operated to sandwich the center of the disk from above, and the motor is driven to rotate the turntable to reproduce the disk.

When the disk loaded as described above is ejected, the disk drive motor is stopped when the disk drive motor is operating, the clamp arm is raised to release the disk clamp, and then the disk is retracted downward. The lower transport roller is raised, the disc is sandwiched between the upper transport rollers or plates, and the transport roller is rotated in the direction of ejection of the disc. Stop driving and project CD
Is taken out by the user.

In such a disc player that can use both the 8 cm CD and the 12 cm CD, when loading any of the discs, the operation of the arm clamp as described above is performed when the disc is completely loaded. , The transport roller must be lowered. Therefore, means for detecting that the disc has been completely loaded and performing the next operation is required.A plurality of optical detection means are used, and various drive controls are performed based on the detection output. It has also been suggested to do so. However, if such a detecting means is provided and various drive control mechanisms are provided, the disc player must be expensive.

As a countermeasure, the lever is brought into contact with the edge of the disk to be loaded, and one of the two disks is determined according to the rotational position of the lever. It has been proposed to link the various operations described above. As one of them, there is a disk loading device disclosed in Japanese Patent Application Laid-Open No. 6-44660. In this device, FIG.
As shown in the figure, the swing of the front arm 202 is changed according to the size of the disk 201 conveyed by the conveyance roller 200. When the CD is 12 cm, the front arm 202 swings to lock at the tip. The pin 204 of the arm 203 is
5 is disengaged from the cam groove 206 so that the stopper arm 205 can be rotated.
The position restriction on the disk stopper 207 by the 05 is released, the 12 cm CD pushes the disk stopper 207 backward, and the stopper arm 205 regulating this is rotated clockwise. When more discs are inserted,
The pin 204 of the lock arm enters the front side of the cam groove 206 of the stopper arm 205 and locks. For this reason, the lock arm 203 also rotates from the rotational movement of the stopper arm 205 alone, whereby the rack gear 208 is operated, and various operations such as driving the shift plate are interlocked. Also, when loading an 8 cm CD, the front arm 202 does not swing because the diameter is small, and the lock arm 203 and the stopper arm 205 are held in a locked state at the tip thereof. When the disc is further inserted,
The lock arm 203 rotates clockwise in synchronization with the stopper arm 205, and the rack gear 208 is operated, and various operations are interlocked by driving the shift plate or the like.

[0006]

The use of such a device eliminates the need for using an optical detection device or the like.
It will be cheap. However, in the above-mentioned apparatus, after loading the disk by performing the above-described operations, a problem occurs when the disk is ejected. That is, in the above device, a large-diameter 12 cm CD
When ejecting the lock arm 203, the front arm 202 is rotated by the edge of the disk, the lock arm 203 is pushed to the left, and locked by the pin 204 of the lock arm 203 and the restricting portion of the cam groove 206 of the stopper arm 205. Release the state. As a result, the stopper arm 205 is urged in the counterclockwise direction by the stopper arm spring 210 to rotate and return to its original position. At this time, the disk stopper 207 also moves in conjunction with this and pushes the rear end of the disk to be ejected. It will be.

The stopper arm spring 210 is
If the spring force is set to be strong, the above-mentioned device can be surely returned to the original state, but at the time of loading, the disk carrying force must be increased to counter the strong spring force, and the load on the motor increases. In addition, since the return speed of the disk stopper 207 is increased and the force is also strong, especially in the case of a 12 cm CD, the rear end of the disk to be ejected is strongly pushed, and the disk jumps out of the entrance of the disk player. This is uncomfortable for the user and may cause damage such as damage to the disk. On the other hand, if the spring force is set to be weak, it is uncertain that the device will be returned to its original position, and it will be impossible to position the small-diameter disk.

Accordingly, the present invention provides an 8 cm CD and a 12 cm CD.
In a disc player that can use a cmCD, 12
It is an object of the present invention to provide a disc player that prevents a disc from jumping out when ejecting a cmCD and that can surely return a disc stopper to a position of 8 cmCD.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention solves the above-mentioned problems by providing a disk detecting lever which swings when a disk comes into contact with the disk, and moves by being pressed by the disk detecting lever when a large diameter disk is inserted. In addition, a lock slider provided with a lock portion for releasing a lock at the time of the movement, a locked portion locked by the lock portion, and a stopper provided at a position where a small-diameter disk can be positioned are provided and stand by at a predetermined position. A switching slider that moves in the disk insertion direction when a large-diameter disk is inserted, and the disk detection lever that is engaged with the switching slider and moves, and is swung by the large-diameter disk when the large-diameter disk is ejected. Lever return to return the switching slider to the predetermined position by the force of the lock lever that moves And a disk player, and a lock slider, a switching slider, and a lever return are provided on an arm clamp for holding a disk, a disk detection lever is provided on a top chassis, and the disk detection lever is A first disk detection lever and a second disk detection lever interlockingly connected by a lever link, wherein the disk detection lever is provided between the top chassis and a cover back plate that receives a transport roller fixed to the top chassis; Also, a lock slider is provided on one side of the arm clamp, a lever return and a switching slider are provided on the other side, and a reversing spring for biasing the switching slider forward and backward is provided.
The switching slider is engaged with a disk end detection lever having a disk detection pin.

[0010]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a so-called 1DIN type CD player to which the present invention is applied. The members constituting the outside thereof are roughly classified into a box-shaped base chassis 1 having an open upper surface and a base chassis 1 as shown in FIG. The top chassis 2 is provided so as to cover the front of the open upper surface (hereinafter, the side of the disc player into which the disc is inserted is referred to as "front", and the rear of the upper surface of the base chassis 1). An arm clamp 4 rotatably provided to the internal member of the base chassis 1 by the left and right rotating portions 3.
And

The top chassis 2 has side plates 6 provided partially outside the side walls 5, 5 of the base chassis 1,
6 are provided on both sides, and left and right openings 7, 7 are located at the side plates 6, 6, and openings 10, 10 are provided at the left and right ends of the front plate 8 of the top chassis 2. Screw arm portions 11 are provided so as to protrude left and right, and roller arm shaft fixing protrusions 12 are provided right and left forward.

On the other hand, the base chassis 1 has left and right projections 13, 13 extending upward facing the openings 7, 7, 10, 10 of the top chassis 2 and front left and right projections 1.
4, 14, and screw receiving portions 15, 15 so as to protrude right and left opposite to the screwing portions 11, 11 of the top chassis 2.
Fitting grooves 18, 18 communicating with bearings 17, 17 that support the roller arm shaft 16 so as to be fitted with 1, 11 are provided. Thereby, when the top chassis 2 is put on the base chassis 1 from above, the side plates 6, 6 of the top chassis 2 are overlapped on the side walls 5, 5 of the base chassis 1, and the projections 13, 13, 1414 of the base chassis 1 are respectively attached. The base chassis 1 is fitted into the openings 7, 7, 10, 10 of the top chassis 2 and the roller arm shaft stoppers 12, 12 of the top chassis 2 are fitted into the fitting grooves 18, 18 of the base chassis 1. And the top chassis 2 are accurately positioned, and the screw receiving portions 15, 1
The screw holes 5 and the screw holes 20 of the top chassis 2 coincide with each other, and are fixed by screwing the screws 49 into the screw holes.

FIG. 2 shows a state in which the top chassis 2 as described above is removed from the base chassis 1, and the cover back plate 21 is removed from the base chassis 1 and turned over, as will be described later. Therefore, in FIG. 2, the front-back direction is the same as that of FIG. The cover back plate 21 has left and right locking projections 22 and 22 protruding forward, left and right engagement projections 23 and 23 protruding downward in the figure at the center, and left and right protruding downward in the figure near both sides. At the center of the rear end, there is provided an engagement protrusion 25 projecting rearward and downward in the figure.
The engagement projections 23, 23, 24,
24, 25 each has a tip extending in one of the left and right directions, and the extended portion constitutes an engaging portion. Also, elastic arms 26, 26 extending forward are provided on the left and right, and locking portions 27, 27 are formed below the front ends of the elastic arms 26, 26. On both sides of the front end of the top chassis 2, a first disk detection lever 2
8, the first detection rod 3 of the second disk detection lever 29
0, a curved edge portion 19 substantially coinciding with the rotation locus of the second detection rod 31 is provided. Behind the cover back plate 21, arms 32, 32 extending substantially rearward and extending in a substantially triangular shape in plan view extend symmetrically, and both ends of a spring 33 are fixed to the ends thereof. In addition, a conveying roller receiving groove 39 is formed on the central surface, and the conveying roller receiving groove 39 gradually becomes deeper as approaching both sides.

On the other hand, the top chassis 2 is provided with locking holes 34, 34 on both sides of the front end edge, and the engagement protrusions 23, 23,
Engagement projections 3 extending toward the cover back plate at positions opposed to 24, 24, 25 and having an engagement portion formed at the end thereof.
5, 35, 36, 36 and 37 are formed. Also, locking holes 38, 38 are provided at positions facing the locking portions 27, 27 formed on the elastic arms 26, 26 on both sides of the cover back plate 21. 2, the cover back plate 21 is applied from above in the figure with the top cover 2 turned upside down, and the cover back plate 21 is shifted forward, so that the locking projections 22 of the cover back plate 21 are shifted. , 22 are provided in locking holes 34, 34 of the top chassis 2, and similarly,
Reference numerals 3 and 23 denote engagement projections 35 and 35, respectively.
Are engaged projections 36, 36, and engagement projection 25 is engagement projection 37.
Are respectively engaged and locked, and the elastic arms 26, 2
The locking portions 27 of the sixth member are fitted into the locking holes 38 by their elastic force and are prevented from falling out.

A first disk detection lever 28 and a second disk detection lever 29, which rotate around rotation holes 40 and 41, are provided on the back side of the top chassis 2, that is, on the top of the top chassis 2 shown in FIG. And the rotating holes 40 and 41
The right and left bosses 42 and 43 formed by deep drawing the material of the top chassis 2 are fitted. Thereby, the first disk detection lever 28 includes a first front lever 44 extending forward and a first rear lever 45 extending rearward with the rotation hole 40 fitted into the boss 42 as a center, and the second disk detection lever The lever 29 includes a second front lever 46 extending forward and a second rear lever 47 extending rearward with the rotation hole 41 fitted into the boss 43 as a center.

At the end of the first front lever 44 of the first disc detection lever 28, there is provided a first detection rod 30 which stands vertically to the lever, and a guide slot is provided near the base 48 of the first front lever 44. 50 are formed. The base 48 of the first disc detection lever 28 centered on the rotation hole 40 includes:
A first guide protrusion 51 formed in a fan shape is provided outside the first disk detection lever 28, and a guide hole 52 formed in a fan shape is formed inside the first disk detection lever 28.
The guide hole 52 is provided with the first guide protrusion 5.
Similar to the first embodiment, a second guide projection 53 is formed symmetrically in a fan shape. A spring engaging portion 54 extending substantially in a U-shape is provided on the outer side near the base 48 of the first rear lever 45 of the first disk detection lever 28, and the first rear lever 4 is provided.
As shown in FIG. 2, when the first disk detection lever 28 is assembled into the top chassis 2, the end of the first disk detection lever 28 protrudes greatly from the rear wall 55 of the top chassis 2.
6 is provided.

The second disk detection lever 29 is formed substantially in the same manner as the first disk detection lever 28, and has a second front side lever 46 having a second vertically extending lever at the end thereof.
A detection rod 31 is provided. A base 60 of the second disk detection lever 29 centered on the rotation hole 41 is provided with a second guide projection 62 formed in a fan shape outside the second disk detection lever 29 and inside the second disk detection lever 29. Is provided with a guide hole 63 formed in a fan shape,
The guide hole 63 has a second guide protrusion 64 formed in a fan-like shape symmetrically with the second guide protrusion 62.
It has. A substantially U-shaped spring locking portion 65 is provided on the outer side near the base 60 of the second rear lever 47 of the second disc detection lever 29, and a guide slot 61 is formed near the base 60. At the end of the second rear lever 47, as shown in FIG. 2, the second disk detection lever 29 is formed such that its tip slightly projects from the rear wall 55 of the top chassis 2 when the second disk detection lever 29 is assembled into the top chassis 2. The projection 66 is provided.

In order to interlock the first disk detection lever 28 and the second disk detection lever 29, there is provided a lever link 70 for connecting the two. Lever link 70
Is a link first boss 72 provided on the first end 71 side.
And a link second boss 74 provided on the second end 73 side thereof, and a first guide groove into which a boss 75 provided on the top chassis 2 is slidably fitted on the first end 71 side. 76, and a second guide groove 78 on the second end 73 side, into which a boss 77 provided on the top chassis 2 is slidably fitted. The lever link 70 is bent at a substantially intermediate portion, so that the first disk detection lever 28 side has the first
The first link is located in the guide slot 50 on the front lever 44 side.
The boss 72 is fitted, the link second boss 74 is fitted in the guide groove hole 61 on the second rear lever 47 side on the second disk detection lever 29 side, and the top chassis is located near both ends. The second bosses 75 and 77, the first guide groove 76 and the second guide grooves 7 and 8 are slidably fitted to each other to guide the lever link, and the first disc detection lever 28 and the second disc detection lever 29 are turned. Movement is linked.

Further, when the levers are incorporated into the top chassis, the state shown in FIG. 2 is maintained, and the spring engaging portion 54 of the first disk detection lever 28 and the first spring A first lever spring 81 is stretched between the upper chassis 80 and the spring engaging portion 65 of the second disk detection lever 29 and the top chassis 2.
A second lever spring 83 is stretched between the second lever hook 82 and the second spring hooking portion 82 provided at the second position. As a result, the first detection rod 30 of the first disk detection lever 28 and the second detection rod 31 of the second disk detection lever 29 are urged in directions approaching each other, and the position of each rod is determined by the position of the cover back plate 21. The movement is stopped at the inner ends of the curved edges 19. The distance between the first detection rod 30 and the second detection rod 31 is set to be smaller than the diameter of the small-diameter 8 cm disk, so that the rod is always in contact with the outer periphery of the disk when the disk is loaded. In addition, the detection switch is turned on and off according to the movement of the rod.
The spring force of the first lever spring 81 and the second lever spring 83 is adjusted so as to be possible.

As shown in FIG. 1, a clamp disk 86 is swingably and rotatably mounted on the arm clamp 4 via a support bracket 85 at the center of the front of the arm clamp 4 so as to protrude forward of the arm clamp 4. When the disc is not inserted into the disc player, the clamp disc is urged upward in a direction in which the clamp disc is turned around the turning section 3.
As shown in FIG. 1, the top surface of the tip of the clamp disk 86
It is received in contact with a spring 33 stretched over an arm 32 of the cover back plate 21.

The arm clamp 4 removes the top chassis 2 from the assembled state shown in FIG. 1 and then moves the rotating parts 3 and 3 supported by bosses 9 and 9 provided on a member (not shown) in the figure. By moving to the left and removing from the bosses 9, 9, it is removed from the base chassis 1. FIG. 3 shows a member attached to the back surface of the arm plate portion 100 with the arm clamp 3 thus removed turned upside down. Therefore, in FIG. 3, as in FIG. 2, the front-rear direction is the same as the state shown in FIG. 1, and the left-right direction is reversed. This figure 3
As is clear from FIG. 3, a lever return 102 rotatably supported by the rotation support portion 101 is provided on the back surface of the arm clamp 4.

The lever return 102 is connected to the rotation support 10.
There is provided a spring receiving lever portion 104 extending rearward from 1 and toward the first side surface 103 of the arm clamp 4, and one end of a reversing spring 106 is hung on a forked spring receiving portion 105 provided at the end thereof. The reversing spring 106 is wound in a coil shape, and a supporting end 91 opposite to the working end 90 hung on the spring receiving portion 105 has a through hole 107 formed near the side edge of the arm plate portion 100 of the arm clamp 4. Is penetrated from the back side, extends to the front side as shown in FIG. 1, is bent and prevented from falling off, and is rotatably supported by the through hole 107.

The lever return 102 is provided with a slider urging lever 108 which extends in the opposite direction to the spring receiving lever 104 and whose distal end extends in the shape of a crane neck toward the center of the arm clamp 4 and rearward in the figure. A boss 111 provided at the center of the back surface of the switching slider 110 is slidably fitted at the tip of the slider urging lever portion 108 as shown by a broken line in FIG.
It has. Further, the guide hole 113 of the arm plate portion 100 is moved in a direction opposite to the tip of the slider urging lever portion.
And a pressing portion 114 which is bent and extends to the front side of the arm plate portion 100. The pressing portion 114 has a guide portion which partially overlaps the front side of the arm plate 100 as shown in FIG. 115 are formed.

The switching slider 110 is shown in FIG. 3 and partially shown in FIG.
And a guide boss extending through the five guide holes in the figure extending in the front-rear direction of the arm plate portion 100 from the surface facing the rear surface of the arm plate portion 100. Of the guide bosses, the center portion thereof is located in the front-rear direction with the boss 111 interposed therebetween.
The center guide bosses 116, 116 are located in a center guide hole 117 provided at the center of the arm plate 100, and are slid and guided along the center guide hole 117. You. On both sides of the center guide boss 116, the inner guide boss 118,
118, the inner guide bosses 118, 118
Inner guide hole 1 provided on both sides of center guide hole 117 of arm plate portion 100 and provided in parallel in the front-rear direction
1 and extends to the front side of the arm plate portion 100. As shown in FIG. 1, the tip is bent and extends to the left in the figure, and is formed so as to partially overlap the surface of the arm plate 100. . Also, this inner guide boss 11
8 and 118, outer guide bosses 121 and 12
1 is provided in the same configuration as the inner guide boss, and the outer guide bosses 121
The outer guide holes 120 extend outside the inner guide holes 120, 120 and are provided in parallel with the front-rear direction and extend to the front side of the arm plate portion 100. As shown in FIG. Outer guide boss 1 on the left side in FIG.
1 is bent and extended to the left side in the figure on the front side, and FIG.
The right outer guide boss 121 is bent to the right in the drawing and extends, and is formed so as to partially overlap the front side of the arm plate 100. As shown in FIG. 3, stopper pins 123 on both sides of which the disc abuts are provided on the surface of the switching slider 110 opposite to the surface on which the bosses protrude.
Is protruding.

On the front side of the arm clamp 4, as shown in FIG.
Are slidably provided on the left and right in the figure. At the left end of the lock slider 125 in FIG. 1, a pressing flange 126 is formed by being bent to the back side, and the pressing flange 126 is formed on the arm clamp 4 and the top chassis 2 as shown in FIG. 1. In the assembled state, and in the free state located on the leftmost side of the lock slider 125, it is located at a predetermined distance from the pressing portion 56 of the first disk detection lever 28. Rock slider 12
5 has a first boss 119 projecting to the back side in FIG. 1 and a second guide slot 127 formed in the right side. The first boss 119 is an arm plate of the arm clamp 4. 100 first guide slot 128 provided at the front end
And the second guide slot 127 is inserted into the arm plate 1
The lock slider 125 is guided on the surface of the arm plate 100 so as to move linearly to the left and right in FIG. 1 on the surface of the arm plate 100.

Lock portions 131, 1 projecting in a substantially L-shape are provided on both left and right sides of a rear edge portion 130 of the lock slider 125.
1 and the lock portions 131, 131 shown in FIG.
Inclined surfaces 133, 133 are formed at the front end portions 132, 132 bent to the middle left side, and lock the inner guide boss 118 as described later. At substantially the center of the lock slider 125, there is provided a spring locking portion 134 projecting from the rear surface in FIG.
The arm clamp 4 is partially shown in FIG.
And extends through a guide hole 135 extending in the left-right direction in front of the front end. A lock slider spring 137 is stretched between the spring locking portion 134 and the spring locking portion 136 projecting from the back surface of the arm clamp 4, so that the lock slider 125 is free when the lock slider 125 is in a free state. Of the first boss 11 in the first guide slot 128.
9 abuts at the right end in FIG. 1 and the movement is stopped by the second boss 129 abutting at the right end in the second guide slot 127 in the same manner. In addition, rock slider 1
A pressing projection 138 is formed at the right end of FIG.

On the other hand, on the back surface of the arm clamp 4, FIG.
As shown in FIG. 7, a disk end detection lever 150 is disposed so as to face the lever return 102.
A bent cam groove 151 is formed in the disk end detection lever 150, and a slider boss 152 protruding in the same direction as each of the bosses of the switching slider 110 is fitted into the cam groove 151. The switching slider 1 shown in FIG.
10, the disc detection pin 153 is attached to the stopper pin 12 at a position located at the notch 149 on the trailing edge.
3, and is provided so as to protrude. A drive pin 160 protrudes from the distal end of the disk end detection lever 150 on the same side as the disk detection pin 153.
It is held in a bifurcated pin holding portion 166 provided at one end of a link lever 165 that rotates about 1. Tip 16 of cam groove 151 of disc end detection lever 150
A lever boss 168 projecting from the opposite side of the drive pin 160 is provided substantially in the middle of the lever boss 168 and the lever boss 168 in the lever boss guide groove 170 provided in the arm plate portion 100 of the arm clamp 4. Is fitted.

The link lever 165 is connected to the pin holding portion 1.
66, a trigger lever operating portion 171 formed in a substantially L-shape on the opposite side to the trigger lever operating portion 171.
Is located so that the trigger lever 172 shown in FIG. 1 can be operated at a predetermined rotation of the link lever. Accordingly, the 8 cm CD and the 12 cm CD are detected by the disk end detection lever 150, and when the disk end detection lever 150 is actuated accordingly, the trigger lever 172 is operated by the operation, and the arm clamp rotation mechanism (not shown) is operated. And the like, to trigger the operation of various mechanisms. The link lever 165 is provided with a spring locking portion 173, and a return spring 175 is stretched between the spring locking portion 174 provided on the arm plate 100, so that the link lever is always kept on the side portion of the arm clamp 4. Are biased in a direction in which the stopper comes in contact with the stopper 176 provided in the first position.

The operation when using the 8 cm CD and the 12 cm CD in the disk player configured as described above will be described. In describing the operation, only the main components are extracted for convenience of explanation, and the operation of the 8 cm CD using FIGS.
1 to 3 will be described with reference to the operation diagrams of the 12 cm CD using FIGS. 7 to 14. First, the operation when the 8 cm CD is used will be described with reference to FIGS. FIG. 4 is a plan view showing the operation of the basic components showing the operation of the disc player according to the present invention. FIG. 4 is a plan view showing the state where the insertion of an 8 cm CD is started or the ejection is completed. FIG. 6 is a plan view of a main part showing a state where the first disk detection arm and the second disk detection arm are most opened while the 8 cm CD is being inserted or ejected, and FIG. It is a principal part top view which shows the state which is completely inserted.

In an initial state in which no disk is inserted, as shown in FIG. 4, the first disk detecting lever 28 is provided by a first lever spring 81, and the second disk detecting lever 29 is provided by a second lever spring. 2, the first detection rod 30 and the second detection rod 31 abut on the inner ends of the curved edges 19 of the cover back plate 21 in FIG. It is connected and its position is maintained.

In this initial state, the lock slider 125 provided on the arm clamp 4 side is always urged by the lock slider spring 137 so as to be always located on the left side in FIG. At this time, the switching slider 1
A switching slider 11 is located at the forefront (below the CD insertion direction in FIG. 4, the same applies hereinafter).
0 is the switching slider 1
10 lock portions 131, 131, and the lock portions 13
The rearward movement is prevented by the one end portion 132, and the locked state is maintained.

Further, in this initial state, since the switching slider 110 is moving forward, the boss 111 of the switching slider 110 is fitted into the elongated hole 112 provided in the lever return 102, so that the lever return 1
Reference numeral 02 denotes a state in which the slider urging lever portion 108 having the elongated hole 112 is held in a state of being most forwardly inclined. At this time, the spring receiving portion 105 of the lever return 102
The support spring 91 is freely rotatable around a portion where the support end 91 is inserted into the through hole 107 of the arm clamp, and is in a state as shown in FIG. Working end 90 of
The force A1 acting on the lever return 102 is
Since the angle between the axis 0 and the axis 93 of the spring receiving lever portion 104 of the lever return 102 is obtuse, it acts clockwise as shown in FIG. A2 is urged in the counterclockwise direction as indicated by A2, and the slider urging lever 108 is urged in the counterclockwise direction as indicated by arrow A3. Switching slider 1
10 is urged forward by the force of the reversing spring 106, that is, downward in FIG.

From the initial state, when the user inserts an 8 cm CD CD1 from the entrance 59 of the disc player when loading an 8 cm CD, the first detection rod 30 and the second detection rod 31 are first inserted as shown in FIG. Abut At this time, the user inserts the CD1 into the disc player, and the CD1 is connected to the first detection rod 30 and the second detection rod 30.
The detection rod 31 is connected to the first lever spring 81 and the second
It is inserted inside while pushing and spreading against the force of the lever spring 83. Thereafter, when the CD1 is inserted, the first detection rod 30 and the second detection rod 31 are pushed out most when they hit the diameter portion of the CD1, and the state shown in FIG. 5 is obtained.
At this time, the pressing portion 56 of the first disk detection lever 28
There is no contact with the pressing flange portion 126 of the lock slider 125, so that the lock slider 125 does not move, and the lock portions 131, 131 remain in the initial state and the inner guide bosses 118, 11 of the switching slider 110.
8 is held.

When the CD 1 is further inserted, the length of the CD 1 between the first detection rod 30 and the second detection rod 31 is reduced, so that the force of the first lever spring 81 and the second lever spring 83 causes The distance between the rods decreases as the length of the CD1 decreases. Thereafter, the CD 1 is finally pulled into the disc player, and the movement is prevented by the stopper pin 123, so that the state shown in FIG. 6 is obtained. At this time, since the CD 1 completely drawn into the inside has a small diameter, the first detection rod 30
And the second detection rod 31 are completely separated from each other, so that the lock slider 125, the switching slider 110, and the lever return 102 do not move at all. In the above process, the switching slider 110 not shown in FIG.
Disc end detection lever 1 located at the rear center
50 disk detection pins 153 are pushed by the edge of CD1,
The disk end detection lever 150 immediately rotates, the link lever 165 is rotated to move the trigger lever 172, the arm clamp 4 is rotated, and various operations of the disk player such as the operation of pressing the CD1 by the clamp disk 86 are started. Is done.

On the other hand, the above operation has been described in connection with the case where an 8 cm CD is inserted from substantially the center of the entrance 59 of the disc player. However, the entrance is made large so that a 12 cm CD can be inserted. In addition, the user does not always insert from the center of the entrance 59, and often pushes deep from the side of the entrance.
At this time, either the first detection rod 30 of the first disk detection lever 28 or the second detection rod 31 of the second disk detection lever 29 is pressed. However, since the two detection levers 28 and 29 are connected by the lever link 70, they will rotate in the same state in any case. For example, if the CD 1 is inserted from the first disk detection lever 28 side, a large rotation of the first disk detection lever 28 causes the pressing portion 56 at the tip thereof to press the pressing flange portion 126 of the lock slider 125 to push the lock slider 125. In FIG. 4, the lock unit 131 is moved rightward, and
Of the inner guide bosses 118, 118 are temporarily released. However, no matter how much the 8 cm CD is removed from the center position of the entrance 59 and pushed in from the side, the first detection rod 30 and the second detection rod 31 are moved before the leading edge of the disc abuts against the stopper pins 123, 123. The lock slider 125 returns to its original position due to the tension of the lock slider spring 137, and the lock portions 131, 131 hold the inner guide bosses 118, 118. , 123 and are not loaded any further.

8c loaded as described above
When the mCD CD1 is ejected, the operation is completely opposite to the operation at the time of loading. That is, when a CD eject signal is input, the drive is stopped when the disk motor is driven, and the arm clamp is rotated to release the clamp disk 8.
The disk is released from the inlet 59 by releasing the clamp of the disk by 6 and rotating the transport roller (not shown) provided below the inlet of the disk in the ejecting direction. At this time, the first detection rod 30 of the first disk detection lever 28 and the second detection rod 31 of the second disk detection lever 29, which are in the initial state, are separated by the first lever spring 81 by the ejection force of the transport roller. Against the force of the second lever spring 83 and push it out to discharge.

On the other hand, this disc player is
When D is used, it operates as shown in FIGS. FIG. 7 is an explanatory view of the operation of the basic components showing the operation of the disc player according to the present invention.
FIG. 8 is a plan view of a main part showing a state where insertion of D is started.
FIG. 9 is a plan view of a main part showing a state where the first disk detection arm and the second disk detection arm are most opened while the 12 cm CD is being inserted or ejected, and FIG. FIG. 12 is a plan view of a main part showing a state in which the disc is in contact with the stopper pin of the switching slider in the initial state while a 12 cm CD is being inserted,
FIG. 10 is a main part plan view showing a state at the moment when the inner guide boss of the switching slider is disengaged from the lock portion of the lock slider while the 12 cm CD is being inserted. FIG. FIG. 12 is a main part plan view showing a state in which the reversing spring for urging the lever return is in a neutral state during the operation, and FIG. 12 is a main part plan view showing a state in which the 12 cm CD is completely inserted. FIG. FIG. 13 shows a 12 cm CD.
FIG. 14 is a plan view of a main part showing an initial stage at the time of discharging
FIG. 9 is a plan view of a principal part showing a state in which a reversing spring for urging a lever return is in a neutral state during ejection of the same 12 cm CD.

When the user pushes in the CD2 which is a large-diameter 12 cm CD from the initial state of the disc player shown in FIG. 7, the first detection rod 30 and the second detection rod 31 are pushed out, and the first disk detection lever 28 The second disk detection lever 29 rotates in the same manner as the above-described CD1. Accordingly, the pressing portion 56 of the first disk detection lever 28 gradually approaches the pressing flange portion 126 of the lock slider 125, and thereafter, both come into contact with each other. After the pressing portion 56 comes into contact with the pressing flange portion 126, the pressing portion 56 presses the pressing flange 126 against the lock slider spring 137 by the force for pressing the CD 2, and moves rightward in the drawing. As a result, the lock portions 131, 131 also move rightward in the drawing, so that the inner guide boss 118 located in the lock portions 131, 131 is released from the locked state. However, as mentioned above, lever return 10
2 is urged by the reversing spring 106 in the direction of the arrow in FIG.
Holds the illustrated position.

Thereafter, when the CD 2 is further inserted, as shown in FIG. 8, the diameter portion of the CD 2 is located between the first detection rod 30 and the second detection rod 31, and the first disk detection lever 28 and the second The disc detection lever 29 is at the maximum swing position. At this time, the lock slider 125 is also at the position where the lock slider 125 is pushed most, but the pressing protrusion 138 provided at the end thereof.
Does not come into contact with the pressing portion 114 of the lever return 102. When CD2 is further inserted inside, the first
Disk detection lever 28 and second disk detection lever 29
Moves as the first detection rod 30 and the second detection rod 31 follow the decrease in the length of the CD2 passing therethrough, and the distance between the two rods 30, 31 decreases. Further, since the pressing portion 56 moves leftward in the drawing due to the rotation of the first disk detection lever 28, the lock slider 125 biased by the lock slider spring 137 also moves leftward in the drawing. . Therefore, the lock portions 131, 131 provided on the lock slider 125 also approach the inner guide bosses 118, 118 of the switching slider 110.

When the CD 2 is further inserted, as shown in FIG.
0 abuts against the stopper pins 123, 123. Thereafter, when CD2 is inserted, the stopper pins 12
3 and 123 are pressed, whereby the switching slider 11 is pressed.
0 starts moving backward. The movement of the switching slider 110 causes the inner guide bosses 118, 118 to move rearward, and at the same time, the lock portions 131, 131 of the lock slider 125 further approach the inner guide boss 118. However, as shown in FIG. 10, after the inner guide bosses 118, 118 have passed over the distal end portions 132, 132 of the lock portions 131, 131, the lock portion 131 returns to the original lock position. The inner guide bosses 118, 118 are not locked by this. In the above process, the lever return 102 also rotates clockwise in FIG. 10 with the movement of the slider boss 111 of the switching slider 110. At this time, since the angle between the axis of the working end 90 of the reversing spring 106 and the axis of the spring receiving lever portion 104 of the lever return 102 is obtuse, the working end 90 of the reversing spring is The receiving lever portion 104 is urged in the direction of the arrow in FIG.
The second slider urging lever unit 108 urges the switching slider 110 in a direction to return as shown by an arrow in FIG.

When the CD 2 is further inserted, the lever return 102 also rotates by the movement of the switching slider 110,
As shown in FIG. 11, the working end 9 of the reversing spring 106
The angle between the axis of 0 and the axis of the spring receiving lever portion 104 of the lever return 102 is a right angle, and the force applied to the lever return by the reversing spring 106 is the neutral position, that is, the dead point. This state is shown in FIG. When the CD 2 is further inserted from this state, the angle between the axis of the working end 90 of the reversing spring 106 and the axis of the spring receiving lever portion 104 of the lever return 102 becomes an acute angle. A biasing force is generated in the opposite direction to the return 102, that is, a reverse action is performed, and the lever return 10
The second slider urging lever unit 108 urges the switching slider 110 backward.

When the insertion of the CD 2 proceeds further, the CD 2 comes into contact with a positioning pin (not shown) arranged on a drive unit provided with a turntable or the like, and the CD 2 cannot be inserted any further. However, the switching slider 110 is
By the urging force applied to the rear end of the lever return 102, FIG.
As shown in FIG. 2, the stopper pin 123 moves further backward and stops, so that the stopper pins 123, 123 do not come into contact with the edge of the disk CD2 and are in the retracted position. At this time, the pressing portion 114 of the lever return 102 is pressed by the pressing protrusion 1 at the end of the lock slider 125.
It stops at a position where it abuts substantially with 38.

Although the detailed description of the operation of the disc end detection lever 150 during the loading process of the disc is omitted, when the disc detection pin 153 is first pushed by the edge of the CD2, the lock slider 12 is moved as described above.
5 is in the unlocked state, the CD 2 presses the stopper pin 123 to move the switching slider 110 backward, the slider boss 152 moves in the cam groove 151, and the lever boss 168 moves to the lever boss guide groove 170.
, The disk end detection lever 150 rotates about the drive pin 160 and does not act on the link lever 165, so that the operation of the arm clamp or the like is not performed during this period. However, when the lever boss 168 reaches the end of the lever boss guide groove 170, the disk end detection lever 150 starts rotating around the lever boss 168, and the drive pin 160 rotates the link lever 165. As described in the description, the trigger lever operating section 171 of the link lever moves the trigger lever 172, and a series of disk drive operations such as clamping of the clamp disk 86 by rotation of the arm clamp 4 are performed.

The 12 loaded as described above
When ejecting the CD2 of the cmCD, when the eject signal of the disc is input, the motor is stopped when the disc motor is driven, the arm clamp 4 is rotated to release the clamp of the CD2 by the clamp disc 86, and the ejection of the transport roller is performed. The CD2 moves in the direction of the entrance 59 by the rotation in the direction. The movement of the disk at this time shifts from the state shown in FIG. 12 to the state shown in FIG. That is, the CD 2 is configured by connecting the first detection rod 30 of the first disk detection lever 28 and the second detection rod 31 of the second disk detection lever 29 to each other.
First lever spring 81 and second lever spring 83
And spread both rods. At that time, the first
Until the pressing portion 56 of the disk detection lever 28 presses the pressing flange portion 126 of the lock slider 125,
The lock slider 125 does not move at all, and the switching slider 110 does not move as shown in FIG. Thereafter, the pressing portion 56 of the first disk detection lever 28 presses the pressing flange portion 126 of the lock slider 125, and moves the lock slider 125 rightward in the figure. With this movement, the lever return 102 is rotated about the rotation support portion 101.

As described above, the first disc detection lever 28 moves by the ejection force of the disc, and the lock slider 125 moves by the force, as a result, the lever return 102 rotates, and the slider urging lever portion 108 Is moved forward, and the elongated hole 112 attempts to move the boss 111 of the switching slider 110 forward. At this time, as shown in FIG. 13, the lever return 102 receives a force for urging the switching slider 110 backward by the reversing spring 106. However, since the force for discharging the CD2 by the transport roller is strong, the reversing spring 106 The switching slider 110 moves forward against this force. This movement is in the state shown in FIG. 14, that is, the angle between the axis of the working end 90 of the reversing spring 106 and the axis of the spring receiving lever portion 104 of the lever return 102 becomes a right angle, and the force acting on the lever return by the reversing spring 106 is reduced. Neutral position,
That is, the same operation is performed up to the position where the dead center is reached. Therefore, as shown in FIG. 14, the disc ejected by the roller and the stopper pin 123 of the switching slider 110
9 is different from the state shown in FIGS. 9 to 11 when the disc is loaded.

When the force acting on the lever return 102 of the reversing spring 106 shown in FIG. 14 reaches the neutral position, when the CD 2 is further ejected, the force of the reversing spring 106 instantaneously exceeds the neutral position of the action of the reversing spring 106. The angle between the axis of the working end 90 of the reversing spring 106 and the axis of the spring receiving lever portion 104 of the lever return 102 becomes obtuse, and the working end 90 of the reversing spring moves the spring receiving lever portion 104 in the direction indicated by the arrow in FIG. Accordingly, the slider urging lever portion 108 of the lever return 102 applies a force to move the switching slider 110 to the entrance side. However, the lever return 102 is moved by the lock slider 125 irrespective of the force of the reversing spring 106 until the CD2 reaches the state where the first detection rod 30 and the second detection rod 31 are fully expanded as shown in FIG. When the movement limit point of the lock slider 125 is exceeded,
The initial state, ie, the lock slider 12
5 is cut off. Thereafter, as the CD 2 is discharged, the gap between the rods 30 and 31 decreases, and the first disk detection lever 28 moves counterclockwise in FIG. With this movement, the lock slider 125 is moved leftward in FIG. 8 by the lock slider spring 137, and returns to the initial state shown in FIG.

Although the embodiment of the present invention is configured as described above, various embodiments exist within the scope of the configuration described in the claims for solving the above-described problem of the present invention. Naturally, the present invention is not limited to the above embodiment.

[0048]

According to the first aspect of the present invention, in particular,
A disc player is constituted by a lever return that returns the switching slider to the predetermined position by the force of the lock lever that is moved by the disc detection lever that is swung by the large-diameter disc. It can be returned to a predetermined position by a force, so that a large-diameter disc does not jump out of the entrance of the disc player unlike the conventional one, and the whole apparatus can be downsized.

According to the second aspect of the present invention, the lock slider, the switching slider, and the lever return are provided on the arm clamp for holding the disk.
The entire device can be reduced in size, and these devices can be integrally removed by removing the arm clamp, which facilitates the assembly and maintenance.
Further, in the invention according to claim 3, since the disk detection lever is provided on the top chassis, this portion can be downsized, and these devices can be integrally removed by removing the top chassis. , And its assembly and maintenance become easy. Claim 4
In the invention according to the first aspect, the disk detection lever is composed of the first disk detection lever and the second disk detection lever interlockingly connected by the lever link, so that the disk can be reliably detected. In the invention according to claim 5,
Since the disk detection lever is provided between the top chassis and the cover back plate that receives the transport roller fixed to the top chassis, the disk detection lever is retained when the top chassis is removed, making maintenance easier and improving the entirety. The size can be reduced.

In the invention according to claim 6, since the lock slider is provided on one side of the arm clamp and the lever return and the switching slider are provided on the other side, the structure can be simplified by using both sides of the arm clamp. In addition, it is possible to avoid buffering the operation of both, and to make the whole compact. Further, in the invention according to claim 7, since the reversing spring for urging the switching slider forward and backward is provided, at the end of the insertion of the 12 cm CD, it can be automatically set to the retracted position from the disc, At the time of ejection, it can be automatically returned to the initial position. In the invention according to claim 8, the switching slider has a disk end detection lever provided with a disk detection pin swingably fixed thereto. Therefore, the disk detection lever, the lock slider, the switching slider, and the lever return are provided. In connection therewith, the disk end detection lever can be operated, and the configuration for performing various operations after detecting the disk end can be made compact.

[Brief description of the drawings]

FIG. 1 is an assembled perspective view of an embodiment of a disc player according to the present invention.

FIG. 2 is a perspective view showing a state where a top chassis of the embodiment is removed, a cover back plate is further removed, and the cover is turned upside down.

FIG. 3 is a perspective view showing a state in which the arm clamp is removed and turned upside down.

FIG. 4 is a main part plan view showing a state where the insertion of an 8 cm CD is started or the ejection of the 8 cm CD is completed as an operation explanatory view of basic components showing the operation of the disc player according to the present invention.

FIG. 5 shows a state in which the first disc detection arm and the second disc detection arm are inserted while the same 8 cm CD is being inserted or ejected.
FIG. 4 is a plan view of a main part showing a state where a disk detection arm is most opened.

FIG. 6 is a main part plan view showing a state where the same 8 cm CD is completely inserted.

FIG. 7 is a plan view showing the operation of the basic components showing the operation of the disc player according to the present invention; FIG.

FIG. 8 is a main part plan view showing a state where the first disk detection arm and the second disk detection arm are most opened while the 12 cm CD is being inserted or ejected.

[FIG. 9] While inserting the same 12 cm CD,
FIG. 5 is a plan view of a main part showing a state where the disc is in contact with a stopper pin of the switching slider in an initial state.

FIG. 10 is a main part plan view showing a state at the moment when the inner guide boss of the switching slider is disengaged from the lock portion of the lock slider while the 12 cm CD is being inserted.

FIG. 11 is a main part plan view showing a state in which a reversing spring for urging the lever return is in a neutral state while the 12 cm CD is being inserted.

FIG. 12 is a main part plan view showing a state where the 12 cm CD is completely inserted.

FIG. 13 is a main part plan view showing an initial state when the 12 cm CD is ejected.

FIG. 14 is a plan view of a relevant part showing a state in which a reversing spring for urging a lever return is in a neutral state while the same 12 cm CD is being ejected.

FIG. 15 is a plan view of a main part showing an example of a conventional disk player.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base chassis 2 Top chassis 4 Arm clamp 21 Cover back plate 28 1st disk detection lever 29 2nd disk detection lever 30 1st detection rod 31 2nd detection rod 39 Conveyance roller receiving groove 56 Pressing part 70 Lever link 81 1st lever Spring 83 Second lever spring 86 Clamp disk 100 Arm plate 102 Lever return 106 Reversing spring 108 Slider urging lever 110 Switching slider 114 Pressing part 118 Inner guide boss 120 Inner guide hole 123 Stopper pin 125 Lock slider 126 Press flange 131 Lock part 137 Lock slider spring 138 Pressing projection 150 Disk end detection lever 153 Disk detection pin 165 Link lever 168 Lever Boss 172 trigger lever

Claims (8)

[Claims] A lock provided with a disk detection lever that swings when a disk abuts thereon, and a lock portion that is pressed by the disk detection lever when a large-diameter disk is inserted and moves, and unlocks when the disk is moved. A slider, a locked portion locked by the lock portion, and a stopper disposed at a position where the small-diameter disk can be positioned; the slider waits at a predetermined position and moves in the disk insertion direction when a large-diameter disk is inserted; A switching slider, which is moved by engaging with the switching slider, and when the large-diameter disk is ejected, the switching slider is moved by the force of the lock lever which is moved by the disk detection lever swung by the large-diameter disk. A disc player comprising a lever return for returning to a predetermined position. 2. The disc player according to claim 1, wherein a lock slider, a switching slider, and a lever return are provided on an arm clamp for holding the disc. 3. The disk player according to claim 1, wherein the disk detection lever is provided on the top chassis. 4. The disk player according to claim 1, wherein the disk detection lever comprises a first disk detection lever and a second disk detection lever interlockingly connected by a lever link. 5. The disk player according to claim 1, wherein the disk detection lever is provided between the top chassis and a cover back plate that receives a transport roller fixed to the top chassis. 6. The disc player according to claim 1, wherein a lock slider is provided on one side of the arm clamp, and a lever return and a switching slider are provided on the other side. 7. The disc player according to claim 1, further comprising a reversing spring for urging the switching slider forward and backward. 8. The disc player according to claim 1, wherein a disc end detection lever having a disc detection pin is engaged with the switching slider.