JPS5982663A - Clamping device of disc of disc carrier - Google Patents

Abstract

PURPOSE:To constitute a simple and compact clamping device by utilizing the characteristics of a disc free from sound grooves on its surface and prevented from damages or dirt on the surface and by allowing the disc to be held from both sides, the face and the reverse. CONSTITUTION:Driving a pulse motor 17 adjusts the movement of a disc carrier 6 and carries a pair of clamp arms 24, 25 of a disc clamping device 7 to the prescribed position of a disc storing rack 5. When electric power is supplied to coils 31, 32, the clamp arms 24, 25 are separated each other. Subsequently, a rotary base is rotated by driving a motor 48 and both clamp arms 24, 25 are inserted into both sides of a disc 4 in the storing rack 5. Then the power supply to both coils 31, 32 is disconnected and both clamp arms 24, 25 are pressed by press-contacting springs 33, 34, so that the disc 4 is directly held by both clam arms 24, 25 from the face and the reverse. Subsequently, the rotary base is rotated by driving the motor 48 to unload the disc 4 from the rack 5. To release the disc 4, power is supplied to the coils again and both clamp arms 24, 25 are separated each other against the press-contacting springs 33, 34.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a disc clamping device for a disc carrier used in a disc changer for automatically exchanging discs such as digital audio discs applied to optical disc playback devices. It is related to.

BACKGROUND TECHNOLOGY AND PROBLEMS Conventionally, various types of disc carriers have been used in audio disc (record) playback devices such as jukeboxes, which have sound grooves formed on their surfaces. Since the sound grooves on the surface of the disk should not be damaged, a disk clamping device is used that clamps the outer circumference of the disk from both sides and transports the disk. In most conventional disk clamping devices, a pair of clamp arms that clamp the outer periphery of the disk from both sides are driven by a link mechanism driven by a plunger solenoid or rack and pinion. However, its structure is extremely complex and expensive.

Purpose of the Invention The present invention utilizes the characteristics of discs, such as digital audio discs used in optical disc playback devices, which have no sound grooves formed on their surfaces and are resistant to scratches and dirt on their surfaces. By making it possible to directly clamp both the front and back sides of the disc, the structure of the disc clamping device can be made extremely simple and compact, and furthermore, the rotating operation for transporting the clamped disc, replacing the disc, etc. can be performed extremely smoothly. We try to provide what we can.

Summary of the Invention The present invention provides a carrier base that is inserted into the outer periphery of a guide shaft and configured to be slidable in the direction of the shaft, a rotating base that is rotatably attached to the outer periphery of the carrier base, and a rotating base that is rotatably attached to the outer periphery of the carrier base. a pair of clamp arms mounted opposite to each other on the outer periphery of the clamp arm, wherein at least one clamp arm is configured to be movable in a distance direction with respect to the other clamp arm; a crimp spring that biases one clamp arm to crimp the other clamp arm;
A cylindrical coil attached to the outer periphery of the rotating base is connected to the rotary base, and when energized, the at least one clamp arm is directly attracted and separated from the other clamp arm against the compression spring. The disc is clamped from both the front and back surfaces between the pair of clamp arms and conveyed along the guide shaft, and the rotation of the rotation base allows the disc player to exchange the disc, etc. To provide a disk clamping device for a disk carrier configured to perform the following operations, the structure of the clamping device being extremely simple and compact, and furthermore, to perform extremely smooth rotational operations for conveying a clamped disk, exchanging the disk, etc. You get what you can.

Embodiments Hereinafter, embodiments of a disc changer for an optical disc reproducing apparatus using discs such as digital audio discs will be described with reference to the drawings.

First, Figure 1 shows the entire disc changer (1), in which a disc player (3), which is an optical disc playback device, and a large number of discs (4) are mounted on a base (2). A disc storage rack (5) is stored and detachably mounted, and a disc carrier (5) is reciprocated between the disc storage rack (5) and the disc player (3).
6) etc. are provided. In addition, disc carrier (6)
is equipped with a disc clamping device (force) for clamping the discs (4) one by one and transporting them at °C, a disc mounting device (8) for mounting the discs (4) on the disc player (3), etc.

Next, the disk carrier (6) has its carrier body Uυ
A pair of cylindrical carrier bases (1
7J (1~ are fixed in a parallel manner, and both of these carrier bases (12 (a pair of guide shirts with 131 installed in parallel on the base (2)) (14) [151 are inserted into the outer periphery. Both carrier pace a
As shown in Fig. 4, a pair of thrust bearings (16) are attached to the inner periphery of the θ island, respectively, and these two carrier bases (121 (131il) and both guide shafts 7) (14) are connected by their thrust bearings (ttti). (1
5) It is constructed so that it can slide smoothly on the top. Therefore, the disc carrier (6) has both guide shafts aatw
t and is configured to reciprocate in the directions of arrows a and a' in FIG. Note that the reciprocating direction of the disk carrier (6) is perpendicular to a large number of disks (4) that are adjacent to each other at a predetermined interval in the disk storage rack (5) and are stored vertically and parallel to each other. direction. On the other hand, on the base (2) is a pulse motor U.
A drive wheel (18) fixed to the motor shaft and a plurality of guide wheel weights are attached to the drive wheel (1).
A part of the drive wire (or flexible member such as a thread or belt) 4 wound between the guide wheels tII and the guide wheels tII is fixed to the carrier main body (formerly). Therefore, pulse motor α
The disk carrier (6) is configured to be reciprocated in the directions of arrows a and a' in FIG. 1 through the drive wire (a) by the forward and reverse rotational drive of the force.

Next, the disk clamp device (7) is shown in Figures 2 to 7.
).

First, as shown in Figures 4 to 6, there is a cylindrical rotating base (c) on the outer periphery of one carrier base (17J).
is rotatably mounted. The axial direction of the rotating base (c) is at the central part, and a pair of clamp arms (24) + 25) arranged at right angles to the axial direction are located on the outer periphery of the rotary base (c), facing each other from the axial direction. It is installed in Note that both of these clamp arms (2
4) (25) 4 They are made of aluminum or other magnetic material, and each of these base ends has a cylindrical part (24
a) (25a) and the disc part (24b) (25b) are provided integrally, and the cylindrical part (24a) (25a)
is inserted into the outer periphery of the rotating base (c) so as to be slidable in the axial direction thereof. Also, both of these clamp arms t
24) (On the inside of the two side plate parts (24b) (25b) there is a recess Q6 in the shape of a triangle with the corresponding apexes cut out)
(27) are formed, and these recesses (2s (2
7) are these recesses (2fi (2η) and the inner guide t21 of the same shape as 2η) that are fixed to the outer circumference of the rotating base (2
H is fitted. Therefore, both clamp arms G! 4)
(,'!il is the outer periphery of the rotating base (c) and is configured to be movable relative to each other in the direction of its axis, and the rotational force of the rotating base (231) moves the inner guide (to) It is configured so that it can rotate around the outer periphery of the carrier base (1 hot water) and is transmitted to the rotating base (2nd floor).

Next, a pair of cylindrical coils (31) (32) are attached to the outer periphery of both ends of the rotating base (C) in the axial direction via a cylindrical yoke (C) (3Q1). Both clamp arms u4) (', !5) as shown in
The cylindrical parts (24a) (25a) and both yokes (29)
(24c) (25c) and (29a)
(30a) They are opposed to each other from the axial direction of the rotating base a. Note that these end faces (24c) (25c)
(29a) and (50a) are formed into symmetrical conical surfaces.

Next, attach both clamp arms (2
4) (2!n) Disc part (24b) (25b) and both E-
vc! Crimping springs (3.04) formed of compression springs are provided at three intervals in the circumferential direction between u).

Therefore, both clamp arms (24) and (25) are moved by the six pressure springs C(3)04) as shown by the arrows and C in FIG.
They are pressed and energized so that they are pressed against each other from both directions. When both coils C(1) and C32) are energized, the magnetic attraction force in the direction parallel to the axis of the rotating base (c) that acts on the end faces (29a) and (30a) of both yokes (c) (30) causes both coils to be energized. Clamp arm (24) C25+ is directly attracted, and both clamp arms c4) tas are separated from each other in the directions of arrows b' and a' against the pressure spring G I3 as shown in FIG. It is composed of

Next, as shown in FIGS. 2 to 4, 7 and 8, a gear 1.3'O is provided on the outer periphery of one end of the rotating base (c). The rotating shaft Gl, to which the gear country meshed with the gear C1η is fixed at one end, is the carrier body 01).
It is rotatably supported through a bearing provided in the shaft, and a friction mechanism (4
υ is provided. This friction mechanism (4υ is a rotating plate (4 motors) fixed to the rotating shaft (3rjI) and a cylindrical part (42a) integrally provided at the center of the rotating plate (421)
A gear (49) rotatably and freely movable in the axial direction is attached to the outer periphery of (
It is composed of a compression spring (4:9) for mutually compressing the gear (49) and the friction plate (44), and a worm wheel meshed with the gear (431) via the gear (46). (4η is pivotally supported by the carrier body (1υ), and the worm (49) fixed to the motor shaft attached to the carrier body side is meshed with the worm wheel (4η. Therefore, the motor ( By the monk's forward and reverse rotation drive, the gear c3 is driven to rotate forward and backward through the worm mechanism and friction mechanism (431), and the gear 6'0 is driven by the worm mechanism and the friction mechanism (431), and the rotation base (
24 is configured to be rotated in forward and reverse directions in the directions of arrows d and d' in FIG.

Then, as mentioned above, both clamp arms (2) and (25) are rotated forward in the directions of arrows d and d' in FIG. , both clamp arms (5) are attached to the carrier body (1).
A pair of stoppers (50) fixed to (!il
) is selectively brought into contact with the stopper t, 'io) (!'if), which can be stopped at a predetermined angle by a pair of micro switches (5a), and both the jimp arms 124) ( 2!19 is both stopper-c';o
) ci+), selectively press these microswitches (!5'2r (53)) to turn the motor (
4al.

Second, as shown in FIGS. 2 and 5, the disk loading device neck (8
).

First, the disk loading device (8) is the disk player (3).
The disk rotating table (C56) is located opposite to the disk rotating table (C56) on the same 11,411m height as the disk rotating table (C56), which is rotatably driven by a motor (not shown). and a cylindrical center piece (5 wings).The disk mounting device (8) consists of a cylindrical fixed base fixed to the carrier body (lυ),
A cylindrical rotating base (6) inserted into the fixed base (Qr+) and pivotally supported at the center of one end by a steel ball Q3υ, and a cylindrical shaped rotating base inserted into the outer periphery of the tip of the rotating base (6). An annular crimping plate (1 phrase) such as a felt plate glued to the tip surface of a circular plate (64) that is integrally provided at the tip of the crimping table (2), A crimping spring ([i
[i] and a stopper ring (67).

(J is a crimping force adjustment screw that also serves as the thrust receiver for the steel ball υ.

According to the disc changer (1) configured as described above, the disc carrier (6) is first adjusted to move in the direction of the arrow a or a' in FIG. A pair of clamp arms (goods) C! [Yes] and disk storage rack (5)
transport to a predetermined position. Furthermore, this Shigure coil (
31) (By energizing 321, both clamp arms (
24) t25) are spaced apart from each other in the directions of arrows b' and C' as shown in FIGS. 5 and 4.

Next, the rotary base (c) is rotated in the direction of arrow d in Fig. 2 by the drive of the motor (4FQ), and both clamp arms (2
)cl! (2) are inserted into both sides of the disk (4) at a predetermined position in the disk storage rack (5) as shown by solid lines in FIGS. 1 and 2, respectively, and as shown in FIG. 7.

Next, turn off the current to both coils C31) (, 33, and press both clamp arms (2) (251) to the spring oi C34.
) in the directions of arrows A and C in FIG. 4, and these two pump arms (24) directly clamp the disk (4) from its front and back surfaces.

Next, the rotation base (c) is moved to the second rotation base (c) by the drive of the motor.
Rotate in the direction of arrow d' in the figure, and both clamp arms f24
) (Remove the disk (4) held between the two from inside the disk storage rack (5), and the disk (4) is shown in phantom lines in Figures 1 to 6, and in Figure 8. As shown by the solid line, the crimping table (6) of the disk mounting device (8) is positioned close to the front surface and on the same axis as this.

Next, by driving the pulse motor αη again, the disc carrier (6) is moved in the direction of the arrow a in FIG. 4) in the direction of arrow a in Figure 1, and insert the disc (4) into the disc rotating table (5G) of the disc player (3). At this time, the disk carrier (6) is once stopped at a position where the disk (4) is inserted into the outer periphery of the center piece (59) of the disk rotating table 6 [9] through its center hole (4a).

Next, both coils Gυ (3) are energized again and both clamp arms (24) and t2s are moved in the directions of arrows b' and C' against the crimping springs c33 and (34), as shown by dotted lines in FIG. Then, the disc (4) is released from the disc (4).

Next, the disk carrier (6) is slightly moved in the direction of arrow a in FIG.
6). That is, by a slight movement of the disc carrier (6) in the direction of arrow a, the crimping platform is inserted into the outer periphery of the center piece (59) and connected to each other on the same axis, and the crimping spring (6G) is pressed. The repulsion force causes the crimping plate to attach the disc (4) to the disc base 5al.
It is crimped and fixed.

Next, after this, the disk (4) is rotated at high speed by the drive shaft G force of the disk player (3), and the disk (4) is optically scanned in the radial direction by an optical pickup (not shown). Then, the audio information recorded on the disc (4) is reproduced, and a so-called automatic performance is performed.

After the automatic playing of the disc (4), the disc (4) is removed from the disc player (3) and transported to the disc storage rack (5) by the reverse operation of the above-mentioned operation.
It will be automatically stored in its original storage position.

By the way, according to this disc changer (1),
By attaching and detaching a disk storage rack (5) that accommodates a large number of individual disks (4), it is possible to exchange files for each block of a large number of disks (4).

Next, the disk storage rack (5) and the structure provided at the rack mounting position ff11 provided on the base (2) will be explained with reference to FIGS. 1, 2, and 7 to 11. .

First, the disc storage rack (5) consists of a rack body (151
One side (front) of the rack body (79) is provided with an opening (761) for loading and unloading the disk (4).The bottom plate (731) has an arcuate disk engaging groove (7η). A large number of openings σ6) are provided adjacently at predetermined intervals as shown in FIGS. 1, 2, and 11.
From the rack body (7 discs inserted within the rack body (7)
4) are respectively inserted and positioned in the disk retaining grooves (77), and are housed adjacent to each other at a predetermined interval, and aligned vertically and parallel to each other. As shown in Fig. 11, in each disc φ engagement groove (7?), there are grooves at predetermined angles 01 and θ2 in the front and rear directions with respect to the vertical line P1 passing through the center of the disc (4). A pair of small projections (78) (791) are provided to support the disk (4).

In addition, the above-mentioned pair of clamp arms (24) (25)
The front end side of the stored disc (4) protrudes from the opening (76) so that the disc (4) can be easily held and taken out by the disc (76).

Next, on the upper surface of the rack body (7ω), a holding plate (signature is horizontally provided. This holding plate 180) is connected to both left and right ends of the rear side through a pair of fulcrum pins (81). (
12, and is configured to be able to rotate up and down from the front end side. And on the outer periphery of both fulcrum pins 1), there is a pair of springs (c) for rotational bias consisting of torsion coil springs.
is attached, and the presser plate (3) is urged to rotate in the direction of arrow e in the lower side of FIG. 11 by the spring action. As shown in FIGS. 9 and 11, on the front edge of the presser plate, there are provided a number of slings (8) facing directly above the respective disc engagements 64.
(83), a small protrusion (8) is provided at a position above the vertical m P+ to press the disc (4) from directly above the disc. The angle θ3 between the small protrusions (hei) in the small protrusions (each slit shout for shouting and slit punching) is formed at an angle of 180° or more. In the front-back direction, a pair of pins (3ω) are provided at the central part, and these pins are a pair of positioning W (86) formed vertically on the outer surface of both side plates (2). is located directly above.

On the other hand, a pair of left and right positioning plates for positioning the mounted disk storage rack (5) are vertically fixed to the chic installation position (71) on the base (2), and both positioning plates A pair of holding plate release members (8 nozzles) which also serve as positioning guide rails are integrally provided in a vertical shape at the center of the front and rear sides of the front and rear facing surfaces.

However, the disk storage rack (5) is shown in Figures 1 and 2.
As shown in Figures 7 to 10, both positioning grooves (8
The rack installation position (7) is determined by inserting both the positioning plates (between the layers) and attaching them to the base (2) so that the positioning plate 0 is inserted into the release member for both presser plates. Both bottles (85) of the plate 180) come into contact with the eight upper end surfaces (89a) of the presser plate releasing member (89a) and are pushed up relative ζ.As a result, as shown in FIG. It is rotated upward in the direction of the arrow e' force against the spring (A), and the state in which each of the disks (4) is held down by the small protrusions of the holding plate (80) is released.

Note that even when the presser plate 9(0) is rotated upward, the upper end of the disk (4) remains positioned within each slit @3). Since the disk (4) is no longer held by the presser plate, the disk (4) can be easily inserted and removed from the opening (16) of the rack body C75).

Next, as shown in FIG. 84) presses and fixes each disc (4) from directly above.However, at this time, the disc (4) is fixed extremely stably by the 6-point support method using the 6 small protrusions FF barrel (RG) (84). However, especially the bimanual processes (781 and 184)
) is more than 180°, the small protrusion (8
The force applied to the disc (4) through the small protrusion on the rear side acts as a force that presses the disc (4).As a result, the disc storage rack (5) is moved to the disc changer (1). From the moment it is removed from the disk, the large number of disks (
4) are pressed down at the same time, and the disc storage rack (5)
) is slightly tilted, the large number of stored racks (5) are reliably prevented from accidentally rolling out from the opening (76) and falling off.

Moreover, according to this disc changer (1), as mentioned above, a pair of clamp arms CI! 5) When the disc (4) is directly clamped from both the front and back sides, it is difficult to determine whether the disc (4) is actually clamped or not.
) is configured to be able to detect the presence or absence of

Next, the disk (4) according to FIGS. 12 and 16
The presence/absence detection device (Riri) will be explained.

Both clamp arms (24) C'! An insulating material t!
A pair of conductive rubber (+51 t%) in a flat plate shape
'J7) (98) is fixed with adhesive or the like. Both conductive rubber wires (!) are connected to the switching transistor (1) of the detection circuit (101) through the lead wires (99) and 4, respectively.
02) is connected to the base terminal and the ground terminal. Note that power is supplied to the collector of the switching transistor (102) via a resistor (103). Also(
104) is a resistance. In addition, both conductive rubber (97)
(911tl serves both as an elastic layer and a conductive surface to be provided on its surface. Also, the detection circuit (10'l) can be modified in various ways.

According to the disk presence/absence detecting device (9) configured as described above, first, as shown in FIG. 12, both rung arms G4
) (When 251 definitely holds the disc (4) (with disc), both conductive rubbers (i]7) (98
) are not contacted and remain non-conductive between them, so the collector voltage of the switching transistor (102) remains "low". Next, as shown in Figure 16, both clamp arms (2H → is the disk (4)
When the conductive rubbers (9 and 4) are pressed together (without a disk), the two conductive rubbers (9 and 4) are in contact and conduction is established between them, so that the collector voltage of the switching transistor (102) becomes [bar f J and Otherwise, a no-disk signal is detected.

Moreover, since both conductive rubbers IJn (!lal) are made of rubber having appropriate elasticity and M friction coefficient, such as silicone rubber, as shown in FIG. When the disc (4) is clamped, the elasticity and friction coefficient of both conductive rubbers (97) (9■) ensure that the disc (4) can always be securely and firmly clamped. It will not damage both sides.The structure that elastically clamps the disc (4) using the elasticity of the special conductive rubber (97) ((g)) is based on the disc clamping surface of both clamp arms (24). (Since it absorbs 990 degrees of variation in parallel accuracy, even if there is a slight deviation in parallel accuracy, the disc (4) can always be firmly and firmly clamped, and both clamp arms (to) A relatively large difference in processing and assembly can be obtained, which is very advantageous in terms of manufacturing.

Application Examples Although the side part of the present invention has been described above, according to the present invention,
While only one of the pair of clamp arms is configured to be movable in the axial direction of the guide shaft on the rotating base,
The other clamp arm is fixedly provided on a rotating base, and one clamp arm is moved in the distance direction relative to the other clamp arm, and the clamp arm is also mounted on the rotating base around a fulcrum. It is also applicable to a structure that is configured to be rotatable so that the two clamp arms can be relatively moved toward each other by rotating the clamp arm.

Effects of the Invention As described above, the present invention includes a carrier base, a rotating base, a pair of clamp arms, a coil, and a pressure spring, and directly attracts at least one of the clamp arms by energizing the coil. The structure is such that the disk is directly clamped between the front and back sides of the pair of clamp arms by the compression spring by cutting off the current to the coil so as to separate it from the other clamp arm. The number of points is very small and the structure is very simple. Furthermore, a rotating base is rotatably attached to the outer periphery of a carrier base into which the outer periphery of the guide shaft is inserted, and a pair of clamp arms and a cylindrical coil are attached to the outer periphery of the rotating base. You can get something compact. Moreover, the pair of clamp arms are conveyed by sliding the carrier base along the guide shaft, and the pair of clamp arms are rotated by the rotation of the rotating base, so that the clamp arms can be held by the pair of clamp arms. Rotation operations for transporting a disk, replacing a disk in a disk player, etc. can be performed extremely smoothly with a simple structure.

[Brief explanation of drawings]

The drawings show an embodiment in which the present invention is applied to a disc changer of an optical disc playback device, in which Fig. 1 is an overall plan view, and Fig. 2 is a cross section taken along the line ■-■ in Fig. 1. Figure 6 is Figure 2 II1. - cross-sectional view along line III;
Figure 4 is a sectional view taken along line IV--IV in Figure 2, Figure 5 is a sectional view taken along line v-v in Figure 4, and Figure 6 is a sectional view taken along line VI-VI in Figure 4.
7 and 8 are perspective views of the disk clamp device, FIG. 9 is a plan view of the main parts of the disk storage rack, and FIG. 10 is a cross-sectional view taken along the line 11 is a sectional view showing a state in which the disc storage rack is removed from the disc changer, and FIGS. 12 and 16 are plan views illustrating detection of the presence or absence of a disc when the disc is held by a pair of clamp arms. be. Also, in the symbols used in the drawings, (1)...Disc changer (
3)... Disc player (4)...
・・Disc (5)・・・・・・Disc storage rack (6)
Disc carrier (force... Disc clamp device (8)...
... Disk mounting device (11) ... Carrier body (12) f[31... Carrier base (L side ω
・Guide shaft (I7) ・・Pulse motor (2υ ・・Drive wire (2A) ・・Rotating base (24) t2ω ・・Clamp arm (29X3)
0) Yoke (31X3a Coil B Kakuyu) Crimp spring (1~... Motor. Agent: Katsutsune Saturn, Yoshio Kazuo, Toshikazu Sugiura Figure 9, 5 Figure 10

Claims (1)

[Claims] A carrier pace inserted into the outer periphery of the guide shaft and configured to be slidable in the axial direction thereof, a rotating base rotatably attached to the outer periphery of the carrier base, and a rotating base that faces the outer periphery of the rotating base. a pair of clamp arms attached, in which at least one clamp arm is configured to be movable in a distance direction with respect to the other clamp arm; A crimp spring is energized to crimp the arm, and a cylindrical coil is attached to the outer periphery of the rotating base, and when energized, the clamp arm is directly attracted to the crimp spring. and a coil configured to be opposed and separated from the other clamp arm,
A disc carrier configured to clamp a disc from both the front and back surfaces between the pair of clamp arms and convey it along the guide shaft, and to perform replacement of the disc with respect to the disc player due to the rotation of the rotation base. Disc clamp device.