JPH04238149A - Positioning device for disk - Google Patents

Abstract

PURPOSE:To provide the inexpensive disk player by surely positioning both of a small-diameter disk and a large-diameter disk and constituting the device in such a manner that this positioning can be executed with simple constitution. CONSTITUTION:This positioning device for disks is constituted of 1st and 2nd guide members which guide the disks by contact of their one end with the outer peripheral edges thereof, a connecting member which connects the 1st and 2nd guide members to each other and cooperatively actuates the 1st and 2nd guide members and 3rd and 4th guide members which come into contact with the disks cooperatively with the 1st and 2nd guide members.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc positioning device for a disc player that plays (or records) compact discs (hereinafter referred to as CDs).

0002

2. Description of the Related Art In recent years, CD players have come into use not only as stationary players but also as portable and car-mounted players. There are two types of CDs: a 12 cm disc and an 8 cm disc, and disc players that can play both discs are becoming mainstream. However, if the disc loading is done using the slot-in method, it is required to automatically position the discs at predetermined positions for playing both discs.

A conventional disc player is disclosed in, for example, Japanese Unexamined Utility Model Publication No. 1-181154, and this conventional disc player will be described below.

FIG. 7 shows the C of this conventional disc player.
It is a top view which shows the guide part of D. In Fig. 7, 1 is an 8cm CD (hereinafter referred to as a small diameter disc), and 2 is a 12cm CD.
cmCD (hereinafter referred to as a large diameter disc). The levers 43 and 46 are rotatably attached to shafts 45 and 47 fixed to the chassis 44, respectively. pin 48,4
9, 50, and 51 are fixed to levers 43 and 46, respectively. The guide pins 53 and 54 are fixed to the connecting plate 52 and are slidably attached to guide holes 44a formed in the chassis 44. Elongated holes 52a and 52b are formed at both ends of the connecting plate 52 and are slidably engaged with the pins 48 and 50, respectively. 55 is hung between the levers 43 and 46 by a spring, and the levers 43 and 46 are normally in the state shown in FIG. Numerals 56, 57, 58, and 59 are disk guides that guide the small-diameter disk 1 and the large-diameter disk, respectively. 60
is a turntable.

The operation of the disc player configured as described above will be explained below.

First, the operation of loading the small diameter disk 1 will be explained. In FIG. 7, small diameter disk 1
(shown by a dashed line) is inserted into a disc player, it is guided between pins 49 and 51 and positioned at the center of the disc player. When the small-diameter disk 1 is further inserted and reaches the first disk detection means (not shown), the first
Disk detection means (not shown) provide commands to the disk transport mechanism. Then, a disk transport mechanism (not shown) starts operating and automatically sends the small diameter disk 1 in the direction of arrow A. Then, at the same time that the outer circumferential edge of the small diameter disk 1 shown by the broken line comes into contact with the disk guides 56 and 57 and stops, the second disk detection means (not shown) operates and stops the feeding by the disk transport mechanism. At this time, the center of the small diameter disk 1 is positioned concentrically with the center of the turntable 60 by the disk guides 56 and 57. From this state, a disk transfer mechanism (not shown) lowers the small diameter disk 1 onto the turntable 60. Finally, the small-diameter disk 1 is clamped with a clamper (not shown) to complete the loading (in the clamped state, the disk guides 56 and 57 are separated from the edge of the small-diameter disk 1). A spindle motor (not shown) rotates the small-diameter disk 1, and an optical pickup (not shown) reads the signal from the small-diameter disk 1 and performs reproduction.

Next, the operation of loading the large-diameter disk 2 will be explained. When the large diameter disc 2 (indicated by the dashed line) is inserted into the disc player and the edges of the large diameter disc 2 come into contact with the pins 49 and 51, the levers 43 and 46 are symmetrical outwardly about the shafts 45 and 47, respectively. Rotate to. At this time, the levers 43 and 46 are rotated symmetrically by the connecting plate 52. Further, the large-diameter disk 2 is guided toward the center by the shafts 49 and 51, and when it reaches the position of the first disk detection means (not shown), the first disk detection means (
(not shown) provides commands to the disk transport mechanism. Then, a disk transport mechanism (not shown) starts operating and automatically sends the large diameter disk 2 in the direction of arrow A. During the transfer of the large-diameter disk 2, a disk selection member (not shown)
comes into contact with the edge of the large-diameter disk 2 and operates, causing the shafts 56, 5
7 is evacuated from the approach path of the large diameter disk 2. Furthermore, when the large-diameter disk 2 is transferred in the direction of arrow A by the disk transfer mechanism, the edge of the large-diameter disk 2 is moved to the disk guide 5.
8 and 59, and at the same time, the third disk detection means (not shown) is activated to stop the operation of the disk transport mechanism (not shown). At this time, the center of the large diameter disk 2 is positioned concentrically with the center of the turntable 60 by the disk guides 58 and 59. From this state, a disk transport mechanism (not shown) lowers the large diameter disk 2 onto the turntable 60. Then, the large-diameter disk 2 is clamped by a clamper (not shown) to complete loading (in the clamped state, the disk guides 58 and 59 are separated from the outer peripheral edge of the large-diameter disk 2). A spindle motor (not shown) rotates the large diameter disk 2, and a pickup (not shown) reads the signal and performs reproduction.

[0008]

[Problems to be Solved by the Invention] However, in the above conventional configuration, two disc guides are provided for positioning the disc, one for the small diameter disc and one for the large diameter disc.
Furthermore, when loading a large-diameter disk, the disk guide for the small-diameter disk is retracted by the disk selection member, which has the problem of complicating the structure.

SUMMARY OF THE INVENTION In view of the above conventional problems, the present invention provides an inexpensive disc player with a simplified configuration by sharing a disc guide for positioning both a small-diameter disc and a large-diameter disc at predetermined positions. With the goal.

0010

[Means for Solving the Problems] In order to achieve this object, the disk positioning device of the present invention provides a first disk positioning device having one end abutting against and guiding the outer peripheral edges of a small diameter disk and a large diameter disk.
a second guide member and a connecting means for connecting the first and second guide members to interlock the first and second guide members;
a first position in which the small-diameter disk is positioned substantially coaxially with the disk drive means by contacting the outer circumferential edge of the small-diameter disk; and a second position in which the small-diameter disk is positioned substantially coaxially with the disk drive means by abutting the outer circumferential edge of the large-diameter disk. The structure includes third and fourth guide members that move between positions in conjunction with the first and second guide members.

[0011]

[Operation] With the above-described structure, the disk positioning device of the present invention has first and second guide members that guide the disk to a predetermined position, and third and fourth guide members that are in contact with the disk.
When the guide members interlock with each other, the first, second, and third guide members
, the fourth guide member comes into contact with the outer peripheral edges of the small diameter disk and the large diameter disk, respectively, and positions the small diameter disk and the large diameter disk substantially coaxially with the disk drive means, thereby simplifying the structure.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing a state in which a small-diameter disk is positioned in a disk positioning device according to an embodiment of the present invention, FIG. 2 is a central sectional view taken along arrow B in FIG. 1, and FIG. 3 is a cross-sectional view of FIG. FIG. 4 is a sectional view of the guide shaft shown in the direction of arrow C in a state in which the disk is clamped, and FIG. 4 is a plan view showing a state in which a large-diameter disk is positioned. A spindle motor 4 and shafts 5, 26 are attached to the chassis 3 shown in FIGS. 1 and 2, and a clamp plate 6 is rotatably provided on the shafts 5, 26. This chassis 3 has guide surfaces 3a, 3b, 3
c and 3d, respectively. Shafts 7, 8, 9, and 10 are fixed to the clamp plate 6 (indicated by dashed lines), and guide levers 11, 12, and
13 and 14 are each rotatably attached. The gear 11a formed on the guide lever 11 is gear 1.
3a and a gear 12a formed on the guide lever 12 mesh with the gear 14a, respectively. Guide lever 11
, 12, 13, 14 have guide shafts 15, 16, 17, 1
8 and the shafts 19, 20 are fixed, and the connecting plate 2 is fixed to the shafts 19, 20.
1 is rotatably attached. A spring 22 is applied between the guide lever 12 and the clamp plate 6, and the guide lever 12 is in a position where it abuts against a stopper 23 fixed to the clamp plate 6 by the biasing force of the spring 22. A turntable 24 incorporating a magnet (not shown) is fixed to the spindle motor 4 as shown in FIG. 2, and a magnetic clamper 25 is rotatably provided on the clamp plate 6. Further, the guide shafts 15 and 16 are formed with tapered surfaces 15a and 16a, respectively.

The operation of the disk positioning device of this embodiment constructed as described above will be explained below.

First, the operation of loading the small diameter disk 1 will be explained with reference to FIGS. 1 and 2. As you insert the small diameter disc 1 (indicated by the dashed line) into the disc insertion slot,
The outer peripheral edge of the small-diameter disk 1 slides on the guide shafts 15 and 16 to rotate the guide lever 11 clockwise and the guide lever 12 counterclockwise, respectively. This guide lever 1
1 and 12 operate symmetrically by the connecting plate 21, so that they guide the small diameter disk 1 toward the center position of the turntable 24. When the small-diameter disk 1 is further inserted, the first disk detection means (not shown) is activated and gives an operation command to the disk transfer mechanism (not shown). This command causes the disk transport mechanism (not shown) to start operating.
When the small diameter disk 1 (indicated by the dashed line) is fed in the direction of arrow A and reaches the position shown in FIG. 1, the outer peripheral edge of the small diameter disk 1 comes into contact with the guide shafts 17 and 18. In this state, the disk transport mechanism (not shown) is operating, but the guide shafts 17 and 18 prevent the small-diameter disk 1 from entering and position the small-diameter disk 1 so that it is coaxial with the turntable 24. ing. In this state, the guide shaft 17 is on the line connecting the center of the small diameter disk 1 and the center of the shaft 10, so the guide lever 14 maintains its position without rotating. Further, the guide lever 13 is also in the same state. When the second disk detection means (not shown) is activated, the disk transfer mechanism (not shown) rotates the clamp plate 6 counterclockwise about the shafts 5 and 26 shown in FIG. change. As the clamp plate 6 rotates, the small diameter disc 1 is moved around the guide shafts 15, 16, 17,
18 clamps and places it on the turntable 24. When the clamp plate 6 further rotates from this state, the tapered surfaces 15a and 16a of the guide shafts 15 and 16 come into sliding contact with the guide surfaces 3a and 3b of the chassis 3, causing the guide lever 11 to move clockwise and the guide lever 12 to move counterclockwise. It rotates clockwise to the state shown in FIG. 3, and the small diameter disc 1, guide shaft 15,
A gap is created between 16. Since the guide shafts 17 and 18 rotate about the shafts 5 and 26 as shown in FIG. 2, they come to be separated from the outer peripheral edge of the small diameter disk 1. And at the same time,
The clamper 25 descends and is attracted by the magnet (not shown) in the turntable 24, clamping the small diameter disk 1 and completing the loading (this state is not shown).
. Then, the spindle motor 4 rotates the small diameter disk 1, and an optical pickup (not shown) reads the signal and performs a reproduction operation. In this reproduction state, there is a gap between the guide shafts 15, 16, 17, 18 and the outer peripheral edge of the small diameter disc 1, so the small diameter disc 1 rotates without any problem.

Next, the loading operation of the large-diameter disk 2 will be explained based on FIGS. 1 and 4. When no disc is inserted, the guide shafts 15 and 16 are in the position shown in FIG. 1. When the large-diameter disk 2 is inserted into the disk insertion slot (not shown) in the state shown in FIG.
clockwise and the guide lever 12 counterclockwise. These guide levers 11 and 12 are connected to the connecting plate 2.
1, the large-diameter disk 2 is guided toward the center of the turntable 24. When the large-diameter disk 2 is further inserted, the first disk detection means (not shown) is activated and gives an operation command to the disk transfer mechanism (not shown). This command causes the disk transport mechanism (
(not shown) starts operating, and the large-diameter disk 2 (indicated by a dashed line) is sent in the direction of arrow A. When the large diameter disc 2 reaches the position shown in FIG.
is moved counterclockwise by the gear 11a, the guide lever 14
are respectively driven clockwise by the gear 12a, resulting in the state shown in FIG. Then, the edges of the large-diameter disk 2 come into contact with the guide shafts 17 and 18. In this state, the disk transport mechanism (not shown) is operating, but the guide shafts 17, 1
8 prevents the large-diameter disk 2 from entering, and positions the large-diameter disk 2 so that it is coaxial with the turntable 24. In this state, the guide shaft 17 is
Since the guide lever 14 is located on a line connecting the center of the large-diameter disk 2 and the center of the shaft 10, the guide lever 14 maintains its position without rotating. Further, the guide lever 13 is also in the same state. Then, the third disk detection means (not shown) operates, and the disk transfer mechanism (not shown) switches to the operation of rotating the clamp plate 6 counterclockwise around the shafts 5 and 26 shown in FIG. . Although FIG. 2 shows a state in which the small-diameter disk 1 is positioned, the same state is true even for the large-diameter disk 2. When the clamp plate 6 rotates, the guide shafts 15, 16, 17, and 18 move the large diameter disk 2 onto the turntable 24.
Place it on. When the clamp plate 6 further rotates from this state, the tapered surfaces 15a, 16a of the guide shafts 15, 16
slides on the guide surfaces 3c and 3d of the chassis 3, the guide lever 11 rotates clockwise and the guide lever 12 rotates counterclockwise, resulting in the state shown in FIG. A gap is created between 16. Also, guide shaft 1
Since the shafts 7 and 18 rotate around the shafts 5 and 26, they come to separate from the outer peripheral edge of the large diameter disk 2. At the same time, the clamper 25 descends and is attracted by a magnet (not shown) in the turntable 24, clamping the large diameter disk 2 and completing the loading (this state is not shown). Then, the spindle motor 4 rotates the large-diameter disk 2, and an optical pickup (not shown) reads the signal and performs a reproduction operation. In this reproduction state, there is a gap between the guide shafts 15, 16, 17, 18 and the outer peripheral edge of the large-diameter disk 2, so the large-diameter disk 2 rotates without any problem.

As described above, according to this embodiment, the first and second guide members whose one ends abut against and guide the outer peripheral edges of the small diameter disk and the large diameter disk, and the gap between the first and second guide members a first position that abuts the outer peripheral edge of the small-diameter disk to position the small-diameter disk substantially coaxially with the disk drive means; third and fourth guide members that move in conjunction with the first and second guide members between a second position that abuts the outer peripheral edge and positions the large diameter disk substantially coaxially with the disk drive means;
By providing a guide member and sharing a guide lever for positioning both the small-diameter disc and the large-diameter disc at predetermined positions, it is possible to provide a disc player with a simple configuration and low cost. Can be positioned.

FIG. 5 is a plan view showing a state in which a small-diameter disk is positioned by the disk positioning device in the second embodiment, and FIG. 6 is a plan view showing a state in which a large-diameter disk is positioned. Note that, in this description, description of the same configuration and operation as in the first embodiment will be omitted. As shown in FIG. 5, the clamp plate 6 (indicated by a dashed line) has shafts 34, 35,
36 are fixed to each other, and guide levers 28, 29, 30 are rotatably attached to the shafts 34, 35, 36, respectively. A gear 29a formed on the guide lever 29 meshes with a gear 30a formed on the guide lever 30. The guide levers 28, 29, 30 have guide shafts 31, 3.
2 and 33 are fixed to shafts 38 and 39, and a connecting plate 21 is rotatably attached between the shafts 38 and 39.

The operation of the second embodiment configured as above will be explained. As shown in Figure 5, the small diameter disc 1
In the state where the small diameter disk 1 is positioned, the guide shafts 31, 32, 33 position the small diameter disk 1. In this state,
The guide shaft 33 is centered on the small diameter disc 1 and the guide lever 3
Since it is on the line connecting the centers of 0, it will not rotate due to the transport force acting on the small diameter disk 1. When the large diameter disk 2 is positioned as shown in FIG. 6, the outer peripheral edge of the large diameter disk 2 comes into contact with the guide shafts 31 and 32,
The guide lever 28 rotates clockwise around the shaft 34, and the guide lever 29 rotates counterclockwise around the shaft 35. At this time, the guide levers 28 and 29 are rotated symmetrically by the connecting plate 21. At the same time, the gear 29a rotates the gear 30a, so the guide lever 30 rotates clockwise about the shaft 36, resulting in the state shown in FIG. 6, and the large diameter disk 2 is positioned. In this state, the guide shaft 33 is on a line connecting the center of the small diameter disk 1 and the center of the guide lever 30, so it will not rotate due to the transfer force acting on the small diameter disk 1.

As described above, according to the second embodiment, the first and second guide members whose one ends abut and guide the outer peripheral edges of the small-diameter disk and the large-diameter disk, and the first and second guide members a connecting means that connects the members to interlock the first and second guide members; and a first position that abuts the outer peripheral edge of the small diameter disk to position the large diameter disk substantially coaxially with the disk drive means. , a third guide member that moves in conjunction with at least one of the first and second guide members between a second position that abuts the outer peripheral edge of the large-diameter disk and positions the large-diameter disk approximately coaxially with the disk drive means; By providing these guide members, an inexpensive disc player can be obtained since the number of guide members is three.

Although the guide lever of the present invention is arranged on the clamp plate, the same effect can be obtained even if the guide lever is arranged on the chassis and the guide surface is formed on the clamp plate. Furthermore, although a slot-in method is used for disc loading in the present invention, a manual method in which a disc is manually inserted can also be used.

[0022]

As described above, the present invention provides first and second guide members whose one ends abut against and guide the outer peripheral edges of a small-diameter disk and a large-diameter disk, and a connection between the first and second guide members. a connecting means for interlocking the first and second guide members; a first position for abutting against the outer circumferential edge of the small-diameter disk to position the small-diameter disk substantially coaxially with the disk drive means; and an outer circumferential edge of the large-diameter disk. providing third and fourth guide members that move in conjunction with the first and second guide members between second positions that abut and position the large diameter disk substantially coaxially with the disk drive means; By sharing a guide member for positioning both the small-diameter disk and the large-diameter disk at predetermined positions, it is possible to provide a disk player with a simple configuration and low cost, and the disks can be positioned reliably. Its practical effects are great.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a state in which a small-diameter disk is positioned in a disk player according to an embodiment of the present invention.

[Figure 2]
A cross-sectional view of the center in the direction of arrow B in Figure 1.

[Figure 3] Figures 2 and 4
A cross-sectional view of the guide shaft shown in the direction of arrow C with the disc clamped.

[Figure 4] Plan view showing the state in which the large-diameter disk is positioned

FIG. 5 is a plan view showing the positioning of the small diameter disc of the disc player in the second embodiment.

[Figure 6] Second
A plan view showing a state in which the large-diameter disk is positioned in the embodiment.

[Fig. 7] A plan view showing the guide section of a conventional disc player.

[Explanation of symbols]

1 Small diameter disc 2 Large diameter disc 3 Chassis 6 Clamp plate 11, 12, 13, 14 Guide lever 15, 16,
17, 18 Guide shaft 21 Connecting plate 25 Clamper

Claims (5)

[Claims] 1. A disk positioning device for moving a small-diameter disk and a large-diameter disk substantially parallel to their main surfaces and positioning them substantially coaxially with a disk drive means, wherein one end is located between the small-diameter disk and the large-diameter disk. first and second guide members that abut and guide the outer peripheral edge; a connecting means that connects the first and second guide members to interlock the first and second guide members; and the small diameter disk. a first position in which the small-diameter disk is positioned substantially coaxially with the disk drive means by contacting the outer circumferential edge of the large-diameter disk; A disk positioning device comprising third and fourth guide members that move in conjunction with the first and second guide members between second positions coaxially positioned. 2. A disk positioning device for moving a small-diameter disk and a large-diameter disk substantially parallel to their main surfaces and positioning them substantially coaxially with a disk drive means, wherein one end is located between the small-diameter disk and the large-diameter disk. first and second guide members that abut and guide the outer peripheral edge; a connecting means that connects the first and second guide members to interlock the first and second guide members; and the small diameter disk. a first position in which the large-diameter disk is positioned substantially coaxially with the disk drive means by contacting an outer circumferential edge of the large-diameter disk; A disk positioning device comprising a third guide member that moves in conjunction with at least one of the first and second guide members between second positions positioned substantially coaxially. 3. In a state in which the disk is positioned, the third and fourth guide members are connected to the disk on or near a line connecting the pivot points of the third and fourth guide members and the center of the disk. The disk positioning device according to claim 1, wherein the disk positioning device is brought into contact with each other. 4. In a state where the disk is being positioned, the third guide member is brought into contact with the disk on or near a line connecting the pivot point of the third guide member and the center of the disk. 2. The disk positioning device according to 2. 5. A chassis provided with a disk drive means for rotating the disk and an optical pickup for reading signals;
a clamp plate that transfers a clamper for clamping the disk to the disk drive means; and first and second guides rotatably provided on the clamp plate and whose one ends abut and guide the outer peripheral edge of the disk. a connecting means for connecting the first and second guide members to interlock the first and second guide levers; and a connecting means for interlocking the first and second guide members; A third guide member that contacts the disk and positions the disk substantially coaxially with the disk drive means is provided on the clamp plate, and a tapered portion is formed at one end of the first and second guide members;
A disk positioning device, wherein a guide surface is formed on the chassis to make contact with the tapered portion and detach the first and second guide members from the disk.