JPH0326465B2 - - Google Patents

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to a disk loading device in a device that reproduces or records/reproduces information using a disk-shaped recording medium (hereinafter referred to as a disk). "Background technology" When playing back (or recording) a disc, a disc inserted at a predetermined position is automatically loaded and played back (or recorded) so that it can be played back (or recorded).
A so-called disk loading device is known that carries out the disk to the predetermined position after finishing. On the other hand, in recent years, video disks on which video/audio signals are recorded and digital audio disks with a diameter as small as 12 cm, which are generally referred to as compact disks, have been developed. There are various types with different thicknesses, etc. Therefore, there is a need for a disk loading device that can accommodate various types of disks regardless of differences in external dimensions and the like. ``Summary of the Invention'' ``Object of the Invention'' Therefore, the present invention provides a disk loading device that is compatible with various types of disks, has a reliable loading operation, has good operability, and prevents deformation and damage to the disk. The purpose is to provide. [Structure of the Invention] The disk loading device according to the present invention is provided with a disk loading device that is movable in the longitudinal direction of the opening in the vicinity of a slit-shaped opening formed in a panel to enable insertion of a disk into a predetermined position. At least two disk guide members are each provided, and only when the output logic states of at least two disk detection means provided on the disk guide members are the same, the two disk guide members are provided.
The disc guide members are configured to be differentially moved by driving means. "Example" Hereinafter, an example of the present invention will be described in detail using the drawings. 1, 2, and 3 are a schematic plan view, a schematic front view, and a schematic side view showing a disk player equipped with a disk loading device according to the present invention. 1 to 3, reference numeral 1 denotes a front panel of the player body, and a slit-shaped opening 3 is formed in the panel to enable insertion of a disc 2 into a predetermined position inside the player. . This opening 3 is formed such that its center in the longitudinal direction is included in a plane substantially perpendicular to the panel 1 that includes the central axis that is the rotation center of the disk during playback. For example, a pair of disk guide members 4, 4' are provided near the rear of the opening 3 for guiding the insertion disk, and the disk guide members 4, 4' are provided with a pair of disk guide members 4, 4' extending in the longitudinal direction of the opening 3. The guide bars 5, 5' are configured to be differentially movable symmetrically with respect to the center in the longitudinal direction of the opening 3. In other words, the disk guide members 4, 4' each have 3
The guide bars 5, 5' are movably engaged with the guide bars 5, 5' via rolling wheels 6, and are provided on support stands 8, 8' which are driven by a motor 7. The motor 7 is driven and controlled by a control circuit to be described later, and rotationally drives the first pulley 10 via a transmission means 9 consisting of a combination of gears or the like. The first pulley 10 is provided near one end of the guide bars 5, 5',
A wire 13 tensioned by a spring 12 is installed between the wire 13 and a second pulley 11 provided near the other end. and support stand 8,
8' are connected to the upper and lower sides of the wire 13 via connecting members 14 and 14', respectively. For example, rod-shaped members are used as the disk guide members 4, 4',
It is provided so that its central axis is substantially perpendicular to the direction of movement. With the above, the disk guide member 4,
4' drive mechanism is constructed. In this drive mechanism, the first pulley 10 is rotationally driven by the motor 7 in the clockwise or counterclockwise direction in FIG. 3, thereby moving the wire 13. As the wire 13 moves, the disk guide members 4, 4' differentially move symmetrically with respect to the longitudinal center of the opening 3, thereby limiting the insertable disk diameter. Fig. 4a shows a state in which the disk is prevented from being inserted, and Fig. 4b shows a state in which the disk can be inserted along the center line A between the guide members. 4,
The width l of 4' restricts disk insertion on the center line and on both sides of the disk guide members 4, 4'. In the above embodiment, the disk guide member 4,
Although a rod-shaped member is used as 4', it is also possible to use a plate-shaped member as shown in FIG. The plate-shaped guide members 4A, 4A' are made of flexible members, are bent at the rollers 15, 15', and are arranged in the storage parts 16,
16'. Although FIG. 5 shows a flexible guide member, if there is sufficient width in the aircraft body, there is no need to wrap it in the storage parts 16, 16', and the opening width can be controlled by simply sliding the plate-shaped member. . In FIG. 5, a is a schematic front view of the panel 1 seen from the back side, and b is a schematic plan view including a partial cross section thereof. In order to control the distance (opening width) between the disk guide members 4, 4' as the disk 2 is inserted, a pair of disk detecting means are connected to the disk guide members 4, 4'.
4'. An optical sensor is used as the disk detection means, and the optical sensor 17 is connected to the holding part 1 fixed to the disk guide member 4 at a distance from each other, as shown in FIG.
It consists of a light emitting element 20 and a light receiving element 21, which are mounted opposite to each other, and the light emitted from the light emitting element 20 to the light receiving element 21 is blocked (shielded) by the disk 2 passing between the two elements. The structure is as follows. The other optical sensor 17' has a similar configuration, and this pair of optical sensors 1
FIG. 7 shows a perspective view of the disk guide member drive mechanism in which the disk guide members 7 and 17' are mounted. Optical sensor 17,1
7' is provided so that its sensitive center substantially coincides with the moving plane X of the disk guide members 4, 4', as shown in Figure 8a, and the disk is not inserted from outside the machine or inserted into the machine. The disk is designed to detect light blocking in any case of automatic loading, automatic unloading from inside the fuselage, or detachment of the disk from the fuselage. As shown in FIG. 8b, if an optical sensor is provided with an inclination θ with respect to the moving plane It comes into contact with the disk guide members 4, 4' before reaching the detection area. FIG. 9 is a block diagram showing one embodiment of a control circuit for driving and controlling the disk guide members 4, 4'. In the figure, light emitting elements 20, 20' forming optical sensors 17, 17' are connected in series between a power supply Vcc and ground via a current limiting resistor _R1 .
The light receiving elements 21, 21' are photoresistive elements.
CdS is used, and the resistance value of the CdS changes depending on the amount of incident light. The light receiving element 21 is connected in series with a fixed resistor R ₂ and a semi-fixed resistor R ₃ between the power supply Vcc and the ground. Resistance value Rf of ₂ , resistance value Rc of photodetector (CdS) 21, and resistance value of semi-fixed resistor _R3
The semi-fixed resistor _R3 is adjusted so that the relational expression Rf=Rc+Rv holds between Rv and Rv. Optical sensor 1
7' also has the same configuration as the optical sensor 17, and equivalent parts are indicated by adding "'" to the reference numerals. The connection point between the fixed resistor R ₂ and the light receiving element 21 is the output end of the optical sensor 17, and the potential at the output end changes as the disk moves. The output of the optical sensor 17 passes through the amplifier 22 having hysteresis characteristics as shown in FIG. 10, and reaches the light receiving element 21 at a high level (hereinafter referred to as "H" level) when the amount of incident light is large, and at a low level (hereinafter referred to as "H" level) when the amount of incident light is small. This is converted into a logical value (hereinafter referred to as "L" level). This logic value signal is a positive logic input AND gate
_G1 and one input each of negative logic input AND gate _G2 . Similarly, the output of optical sensor 17' is output to amplifier 2.
2', it becomes the other input of a positive logic input AND gate _G1 and a negative logic input AND gate _G2 . The motor drive circuit 23 controls the motor 7 to rotate forward or reverse according to each output of AND gates _G1 and _G2 . The motor 7 is for driving the disk guide members 4, 4' as described above. In the above configuration, when the disk 2 is first inserted along the center line of the opening, the outer edge of the disk gradually enters the optical detection area of the optical sensors 17, 17', reducing the amount of light received by the light receiving elements 21, 21'. When the amount of light incident on both the left and right light receiving elements 21, 21' becomes less than the specified value, the outputs of the amplifiers 22, 22' both become "L" level, so the negative logic input AND
The output of gate _G2 becomes "H" level. As a result, the motor drive circuit 23 drives the motor 7, for example, in the forward direction, moves the disk guide members 4, 4', and widens the opening width. As the aperture width is expanded, the optical detection area moves outward, so the amount of light incident on the light-receiving elements 21, 21' increases, and first the output of either the left or right amplifier 22, 22' becomes "H" level.
Motor 7 stops. By inserting the disk again, the above-described operation is performed, and the opening width gradually increases as the disk is inserted. On the other hand, when the disk is removed, the amount of incident light reaches the maximum for each light receiving element, and the outputs of the amplifiers 22 and 22' both become "H" level, so the positive logic input AND gate
When the output of _G1 becomes "H" level, the motor 7 is driven, for example, in the reverse direction, in order to narrow the opening width. That is, as shown in the table on the next page, when the disk is inserted approximately in the center of the opening, the light receiving elements 21,
21' are both blocked, and the amplifiers 22,

[Table] Since the outputs of 22' are both at "L" level, the output of AND gate _G1 is at "L" level, and the output of AND gate _G2 is at "H" level, disk guide members 4 and 4' are opened. Move in the direction of expanding the width (opening direction). When the insertion disk is biased to the right or left, the amount of incident light to one photodetector becomes maximum, the other is blocked, and the outputs of AND gates G ₁ and G ₂ are changed because the amplifiers 22 and 22' output different logic levels. Both reach the "L" level, and the aperture width control operation stops. In addition, when the disk is removed, that is, when there is no disk, the light receiving elements 21, 21'
The incident light amounts of both become maximum, and the amplifiers 22 and 2
Since both outputs of 2' are at "H" level,
The output of AND gate G ₁ becomes "H" level, the output of AND gate G ₂ becomes "L" level, and the disk guide members 4, 4' move in the direction of reducing the opening width (closing direction).
It moves to . A fixed shielding plate 24 is provided approximately in the center of the opening. Both ends 24a and 24b of this shielding plate 24
As shown in FIG. 11, when the disk guide members 4, 4' reach a predetermined position while moving in the closing direction, the minimum aperture width is reduced by blocking the optical paths of the optical sensors 17, 17'. I'm starting to make decisions. That is, the disk guide members 4, 4' are arranged so that the disks are connected to the optical sensors 17, 17' as described above.
If not above, direction to reduce opening width (closing direction)
When the disk guide members 4, 4' reach a predetermined position, the shielding plate 24 blocks the optical path of either one of the optical sensors 17, 17', thereby opening the gate G ₁ , Since the outputs of G ₂ are both at "L" level, the disk guide member 4,
4' stops moving, and the minimum opening width is determined. This position becomes the home position of the disk guide members 4, 4'. The minimum opening width is set to be smaller than the diameter of the smallest disk used,
At the same time, the widths of the other divided openings divided by the disk guide members 4, 4' are also set to be smaller than the diameter of the smallest disk. Note that the shielding plate 24
The optical paths of the optical sensors 17 and 17' can be blocked by either one of them first, or by controlling the dead zone width using the hysteresis characteristics of the amplifiers 22 and 22'. It can also be configured. Furthermore, it is also possible to configure the shielding plate 24 to block only the optical path of either one of the optical sensors 17, 17'. In addition, as another embodiment, as shown in FIG. 12, a pair of shielding plates 25, 25' are fixed to support stands 8, 8' and made movable, so that each shielding plate 25, 25'', an optical sensor 17' attached to 8;
A similar effect can be obtained by configuring the optical path 17 to be blocked. In FIG. 13, below the support stand 8 there are a plurality of switches 26 (26 ₀
...26n, 26o ₊₁ ) are provided along the moving direction of the support stand 8, and the switch 26 is reversed by engaging with the engagement piece 27 attached to the lower part of the support stand 8. do. These switches 26 are used to adjust the opening width between the opening width of the disc guide members 4, 4' required to insert a disc of a given diameter and the opening width required to insert a disc of the next larger diameter. The position is determined so that it is reversed at the position. In the state before the disk is inserted, the support base 8 is located at a position corresponding to the minimum opening width, and the 0th switch ₂₆₀ is in the on state. 1 to 3, a disk holding stand 28 for holding the disk 2 inserted through the opening 3 is provided at the back of the opening 3 of the panel 1. It is configured to be movable in the left-right direction in FIG. 1 for carrying in and out. As shown in FIG. 14, this disk holding base 28 is provided with, for example, a pair of regulating pins 29, 29', which regulate the insertion amount of the disk according to the diameter of the disk used _. ,29 ₁ '...29n,29n',2
9 _o+1 , 29' _o+1 ], and these plurality of pairs of regulating pins are configured to project onto the surface of the disk holding base 28 as appropriate. That is, in FIG. 14, the regulating pin 29 ₁ ,
29 ₁ ' is connected to a drive source, for example, an actuator 32 of a plunger 31 via a connecting member 30, and when the plunger 31 is operated, it projects onto the surface of the disk holding base 28, thereby regulating the insertion amount of the disk 2. In FIG. 14, the regulating pins 29 ₁ , 2
Connecting member 30 and plunger 3 corresponding to 9 ₁ '
Although only one restriction pin 1 is shown, other restriction pins have similar configurations although not shown. Regardless of the diameter of the inserted disk, its outer edge comes into contact with the regulating pins 29, 29' and the amount of insertion is regulated, so that the center of the disk is aligned with the reference point O in the notch 28a of the disk holding base 28. Approximately match. Further, disk insertion completion detection means 33 for detecting whether or not the disk has been inserted by a predetermined amount is provided according to the disk diameter, and the detection means 33 are arranged facing each other on the panel 1 and the disk holding base 28. For example, it is composed of a light emitting diode and a phototransistor. FIG. 15 is a block diagram showing an example of a control circuit for the plunger 31 for driving the regulating pins 29, 29'. In this figure, switches 26 ₀ to
26 _o+1 is for detecting the position of the support base 8 as explained in FIG. 13, the movable contacts of these switches are grounded, and the two fixed contacts are
RS flip-flop 34 ₀ to 34 _o+1 set S
and reset R input terminals, respectively. S and R of flip-flop 34 ₀ to 34 _o+1
The input terminals are each connected to the power supply Vcc via a resistor _R0 . The output of the flip-flop ₃₄₀ becomes the clear input for the T-type flip-flops ₃₅₁ to _35o+1 in the next stage, and the flip-flops ₃₄₁ to 3
4 _o+1 output is flip-flop 35 ₁ ~ 35 _o+1
This becomes the clock input. flipflop 35 ₁
~35 _o+1 output is negative logic input AND gate 36
It becomes one input of ₁ to 36 _o+1 . AND gate 36 ₁ ~
36 _o+1 outputs are supplied to an encoder 37.
The encoder 37 determines the size of the inserted disk based on the outputs of the AND gates 36 ₁ to 36 _o+1 ,
It outputs size signals Q ₁ to _{Q o+1} corresponding to the size. 38 is a switch for detecting the home position of the disk holding base 28;
8 is connected between the power supply Vcc and ground via a resistor R ₄ , and its output serves as the other input to the AND gates 36 ₁ to 36 _o+1 as well as the latch input of the encoder 37 . Therefore, the outputs of the flip-flops 35 ₁ to 35 _o+1 are input to the encoder 37 only when the disk holding base 28 is at the home position, and the size determination operation is performed, and the determination information of the encoder 37 is stored after playback is completed. Disc holding stand 28
is held until it returns to its home position.
Outputs Q ₁ to _{Q o+1} of encoder 37 are driver 3
9 ₁ to 39 _o+1 and AND gate 4
One input (positive logic input) from 0 ₁ to 40 _o+1 . Driver 39 ₁ ~ 39 _o+1 is its output terminal and power supply Vcc
Plungers 31 ₁ to 31 _o+1 connected between
to drive. Disk insertion completion detection means 33 ₁ ~
The output of 33 _o+1 passes through the waveform shaping circuit 41 ₁ to 41 _o+1
This serves as the other input (negative logic input) of AND gates 40 ₁ to 40 _o+1 . The outputs of the AND gates 40 ₁ to 40 _o+1 are supplied to the disk holding stand drive circuit 43 via the NOR gate 42 . Disk holding stand drive circuit 4
Reference numeral 3 denotes a motor 4 which is a drive source for the disk holding table 28.
4, and its details will be described later. This drive circuit 43 outputs a signal indicating that the motor 44 is operating, that is, the disk holding table 28 is moving, and becomes one input of the NOR gate 45. The other input of the NOR gate 45 is the output of the flip-flop ₃₄₀ , which is supplied via the inverter 46. Driver 39 ₁ ~ 39 _o
+1 is the plunger 31 ₁ based on the output of the NOR gate 45 only when inserting the disk and transporting the disk.
~31 Drive _o+1 . Now, if the disk 2 having the nth diameter is inserted through the opening 3 of the panel 1, the supports 8 and 8' on which the disk guide members 4 and 4' and the optical sensors 17 and 17' are mounted are attached to the disk. It moves outward according to the amount of insertion, expanding the opening width formed by the disk guide members 4, 4'. Due to the movement of the supports 8 and 8', the switch 26 ₀ (13th
RS flip-flop 3 by inverting (see figure)
The output of transistor ₄₀ transitions from the "H" level to the "L" level, releasing the clear state of the T-type flip-flops ₃₅₁ to _35o+1 . As the supports 8, 8' move further outward, the switches 26 ₁ , 26 ₂ . . .
26n are sequentially inverted, and along with this, the RS flip-flops are inverted to _{34 1} , _{34 2 .}
The Q output of is sequentially transitioned from "H" level to "L" level. When the disk is inserted, the disk holding base 28 is at the home position, so the switch 38 is in the on state, so the Q outputs of the flip-flops 35 ₁ -35n are supplied to the encoder 37 via the AND gates 36 ₁ -36n. This allows encoder 3
For 7, the output corresponds to the diameter of the inserted disk.
Only Qn transitions from "L" level to "H" level. In response to this Qn output, the driver 39n
operates the plunger 31n, causing the n-th regulating pins 29n, 29n' (see FIG. 14) to protrude onto the surface of the disk holding base 28. When the outer edge of the inserted disk comes into contact with the regulation pins 29n, 29n' and the insertion of the disk is completed, the output of the disk insertion completion detection means 33n changes from the "H" level to the "L" level, and passes through the waveform shaping circuit 41n to the AND signal. It is supplied to the gate 40n. The output of the AND gate 40n passes through the OR gate 42 and operates the disk holding stand drive circuit 43. As a result, the motor 44 for moving the disk guide members 4, 4' starts rotating. In FIGS. 1 to 3, the disk holding stand 28
is a pair of guide rails 47 provided inside the fuselage,
47' through, for example, four guide pieces 48, and is supported in the disk loading/unloading direction, that is, the first
A pair of guide rails 47 in the left and right direction of the figure,
47'. A motor 44 and a deceleration mechanism 49 are attached to the disc holder 28 to drive the disc holder 28, and a pinion gear 50 at the final stage of the deceleration mechanism 49 meshes with a rack 51a of a slide plate 51. . The slide plate 51 is connected to the guide rails 47, 4
The guide pin 5 has a guide groove 52 substantially parallel to 7' and is fixed to the fuselage by the guide groove 52.
3, the direction of movement thereof is restricted to a direction substantially parallel to the guide rails 47, 47',
Furthermore, a substantially L-shaped keyway 54 is provided with a cam portion 54a.
have. This keyway 54 has a regulating lever 5.
The regulating lever 55 is rotatably supported by a guide pin 53 and biased counterclockwise by a spring 57. A stopper pin 58 is fixed to the free end of the regulation lever 55, and the stopper pin 58 has a recess 5 in a part of its longitudinal side.
9 and is in contact with the longitudinal side surface of the rotation regulating plate 60 attached to the disk holding base 28. A clamper drive cam 62 is provided on the slide plate 51 so as to drive a clamper operating shaft 61, which will be described later, as the slide plate moves.
The aforementioned switch 38 (see FIG. 15) is attached to the machine body so that it engages with the guide piece 48 and turns on when the disk holding base 28 is at the position closest to the opening 3, that is, at the home position. . FIG. 16 is a side view, partially in section, showing one embodiment of the dike clamp device. In this figure,
The clamper operating shaft 61 is connected to the clamper support member 63
It is fixed approximately at the center of the The clamper support member 63 has a support portion 65 that supports the clamp member 64.
and a bearing 66 fixed to itself.
The clamper drive cam 62 is slidably supported in a direction perpendicular to the moving direction of the clamper drive cam 62 by a shaft 67 fixed perpendicularly to the bottom of the machine body. The clamp member 64 has a clamp surface 64a that can come into contact with the peripheral part of the center hole of the disk 2, a stopper part 64b that engages with the support part 65, and a through hole 64c in the center.
and a recess 64d. Furthermore, a tapered portion 64e is provided so as to be able to fit into the center hole of the disk 2 when the center hole becomes large. A clamp member 64 is slidably supported in the through hole 64c in the vertical direction in the figure, and a spring 68 as an elastic body is installed in the through hole 64c.
is urged downward in the figure so that one end contacts the clamper support member 63 and the other end contacts the clamper support member 63.
The clamp shaft 6 protrudes from the clamp surface 64a of 4.
9 is passing through. A disk drive unit 70 for rotationally driving the disk 2 is arranged to face the clamp surface 64a of the clamp member 64, and a gap is provided between the two through which the disk holding base 28 on which the disk 2 is mounted can pass. . The disk drive unit 70 includes a drive motor 71 attached to the body, and a turntable 72 that is integrally attached to the motor 71 and rotates the disk 2 . At the center of the turntable 72, a fitting portion (recess) 73 is provided which fits into the above-mentioned clamp shaft 69. Furthermore, an engaging member 75 is provided in the center concave portion 72a of the turntable 72, and is biased downward in the drawing by a spring 74, and is capable of engaging with the disk center hole at its tapered portion 75a. 75
is rotatable together with the turntable 72 by having its movement restricted by a fixing pin 76. Figure 17 generally shows a compact disk (CD).
A digital audio disk called . The centering of the disk is performed by the portion 75a. FIG. 18 shows a video disc (VD) in a clamped state, and since the center hole of the video disc 79 is larger than the center hole of the compact disc 78, the video disc 79 is clamped with the video disc 79 engaged with the center hole. The member 64 is centered by the tapered portion 64e and is held between the turntable 72 and the turntable 72. FIG. 19 shows the disk holding stand drive circuit 4 mentioned above.
FIG. 3 is a circuit diagram showing a specific example of No. 3; In this figure,
Reference numeral 80 denotes a clamp completion detection switch for detecting the completion of the clamping operation of the disk 2, and the switch 80 detects when the slide plate 51 moving rightward in FIG. 1 reaches the right dead center.
It is attached to the aircraft body in such a way that it is activated (turned on) when engaged with. Switch 80 is powered via resistor _R5
It is connected between Vcc and ground, and its output passes through an inverter 81 and becomes one input each of AND gates 82 and 83. A home position detection switch 38 for detecting the home position of the disk holding base 28 is connected between the power supply Vcc and ground via a resistor _R6 , and its output is sent via an inverter 84.
It becomes another input of AND gate 83 and one input of AND gate 85. The RS flip-flop 86 uses the output of the OR gate 42 (shown in FIG. 15) as a set input, and uses as a reset input the discharge command signal generated after the end of regeneration or when the regeneration is stopped. The Q output of the flip-flop 86 serves as another input to the AND gate 82, and also passes through an inverter 87 to the AND gate 8.
It can also be used as an input in addition to 5. AND gates 82 and 85
Each output is connected to resistors R ₇ and R ₈ as forward and reverse rotation signals.
These become the base inputs of transistors _Q1 and _Q2 , respectively. The output of AND gate 83 is AND
The signal is supplied to the gate 45 (shown in FIG. 15). Transistors Q ₁ and Q ₂ are connected in series with transistors Q ₃ and Q ₄ between the power supply Vcc and ground, respectively, and a motor 44, which is a drive source for the disk holding table 28, is connected between their respective collectors. Also transistor
The collector of Q ₁ is connected to transistor Q ₄ through resistor R ₉
At the base of , the collector of transistor Q ₂ is a resistor
Each is connected to the base of transistor Q ₃ via R ₁₀ . Next, the loading and unloading operations of the disk 2 by the disk holding table 28, that is, the loading operation, will be explained with reference to FIGS. 1 to 3, FIG. 16, and FIG. 19. As explained based on FIG. 15, when the insertion of disk 2 is completed, the flip-flop 86
is set and the clamp completion detection switch 80
is in the OFF state, the disk holding stand drive motor 44 starts normal rotation, and its rotational driving force is transmitted to the rack 51a of the slide plate 51 via the deceleration mechanism 49.
8 and the slide plate 51 try to move in opposite directions. However, the cam follower 56 of the regulation lever 55 is engaged with the cam part 54a of the keyway 54 of the slide plate 51, and the stopper pin 58 of the regulation lever 55 comes into contact with the longitudinal side of the rotation regulation plate 60, preventing the regulation lever 55 from rotating. Since it is prohibited to
The slide plate 51 does not move and the disk holding base 28
moves along the guide rails 47, 47', and begins the loading operation of the disk 2. As the disk holding base 28 moves, the home position detection switch 44, which was engaged with the guide piece 48 and turned on, is reversed. When the disk 2 is carried to a position where the center axis of the disk and the center axis of the turntable 72 substantially coincide, the recess 59 formed on the longitudinal side of the rotation regulating plate 60 reaches the rotation trajectory of the stopper pin 58, and the rotation is stopped. Since the restriction plate 60 prevents the restriction lever 55 from rotating, the slide plate 51 moves while rotating the restriction lever 55 with the cam portion 54a of the keyway 54. At the same time, the stopper pin 58 engages with the recess 59 of the rotation regulating plate 60, so that the movement of the disk holding base 28 is stopped. As the slide plate 51 further moves along the guide pin 53, the clamper drive cam 62
drives the clamper operating shaft 61 to move the clamper support member 63, and the clamp member 64 is moved to the notch 28a of the disk holding base 28 (see FIG. 14).
through it and bring it into contact with disk 2. The clamp member 64 then clamps the disk 2 to the turntable 72. At this time, the disc 2 is
5 or the tapered portion 64e of the clamp member 64 so that its center substantially coincides with the drive shaft of the drive motor 71. In the clamped state, the stopper portion 64b of the clamp member 64 and the support portion 65 of the clamper support member 63 come out of contact. Also, the clamp shaft 69 is connected to the fitting hole 7.
3, and the clamp member 64 is rotatably supported together with the turntable 72. The slide plate 51 continues to move further and reverses the clamp completion detection switch 80, which had been in the OFF state until then, thereby turning the disk holder drive motor 44 on.
rotation stops, and loading of disk 2 is completed. As described above, the disc 2 becomes ready for playback, and can be played by rotating the drive motor 71 and driving a suitable pickup (not shown). Conversely, after the playback is completed or when playback is stopped, the ejection command signal is input to the reset input of the flip-flop 86, so that the playback home position detection switch 38 is in the OFF state, so that the disk holding stand drive motor 44 is turned off.
is rotated (reversely) in the opposite direction to that at the time of loading, and the operation proceeds in the reverse order to that at the time of loading, and the disk 2 is unloaded. In the above embodiment, a case has been described in which the present invention is applied to a reproduction-only device, but the present invention can also be applied to a recording-only device or a device capable of recording and reproduction. Also, in Figure 15,
Encoder 37 according to the size of the inserted disk
It is also possible to display the size of the inserted disk by driving a display element such as a light emitting diode based on the size signals Q ₁ to _{Q o+1} output from. "Effects of the Invention" As detailed above, in the disk loading device according to the present invention, the opening is located near the slit-shaped opening formed in the panel to enable insertion of the disk into a predetermined position. At least two disk guide members are provided to be movable in the longitudinal direction, and the two disk guide members are differentially moved in response to outputs from at least two disk detection means provided on each of the disk guide members. The inserting disk is configured to pass between these two disk guide members, and as a result, even if the disks have different diameters, the disks can be guided so that the center of the disk follows approximately the same trajectory. Regardless of the difference, a disk can be reliably set in a predetermined position using one opening. Further, handling is very easy because it is only necessary to insert the disk without knowing the disk diameter in advance and setting the opening width accordingly. Further, in such a configuration, the reaction force applied from the disk guide member to the inserted disk is almost zero, and the disk will not be deformed or damaged. In the disk loading device according to the present invention, in addition to the above configuration, the driving means drives both disk guide members only when the output logic states of the two disk detecting means are the same. . Therefore, since the disk guide member does not start moving unless the disk is inserted into the correct position, the disk can be reliably mounted at a predetermined position.

[Brief explanation of the drawing]

1, 2, and 3 are a schematic plan view, a schematic front view, and a schematic side view showing a disk player equipped with a disk loading device according to the present invention,
Figures 4a and b are diagrams showing the disk inserted state, Figure 5
Figure a is a schematic front view showing another embodiment of the disk guide member, b is a schematic plan view including a partial cross section thereof, FIG. 6 is a schematic side view showing one embodiment of the disk detection means, and FIG. FIG. 8 is a perspective view showing the disk guide member drive mechanism, FIG. 8 is a view showing the mounting state of the optical sensor, FIG. 9 is a block diagram showing an embodiment of the control circuit for controlling the disk guide member, and FIG. FIG. 9 is a diagram showing the hysteresis characteristics of the amplifier, FIG. 11 is a front view showing one embodiment of the shield plate that determines the minimum aperture width, and FIG. 12 is another implementation of the shield plate that determines the minimum aperture width. FIG. 13 is a configuration diagram showing an example of means for detecting the position of the support base, FIG. 14 a is a schematic plan view showing an example of means for regulating the amount of disk insertion, and FIG. 15 is a block diagram showing an example of a plunger control circuit for driving a regulating pin, and FIG. 16 is a side view including a partial cross section showing an example of a disk clamp device. Figure 17 is a diagram showing the clamped state of the compact disc,
FIG. 18 is a diagram showing the clamped state of the video disc, and FIG. 19 is a circuit diagram showing a specific example of the disc holding stand drive circuit. Explanation of symbols of main parts, 2...disk, 3...
...opening, 4, 4'...disk guide member, 7,
44, 71... Motor, 8, 8'... Support stand, 1
0, 11... Pulley, 17, 17'... Optical sensor, 23... Motor drive circuit, 28... Disc holding stand, 29, 29'... Regulating pin, 33... Disk insertion completion detection means, 37... ...encoder,
43...Disk holding stand drive circuit, 47, 47'
...Guide rail, 51...Slide plate, 54...
...Keyway, 55...Regulation lever, 56...Cam follower, 61...Clamper operating shaft, 62...
Clamper drive cam, 64...clamp member, 7
2... Turntable.

Claims (1)

[Claims] 1. A disk loading device that automatically carries a disk installed at a predetermined position to a playback (or recording) position and automatically carries out the disk to the predetermined position after the playback (or recording) is completed,
a slit-shaped opening formed in the panel to enable insertion of the disk into the predetermined position; and at least two disk guides provided near the opening and movable in the longitudinal direction of the opening. a member, at least two disk detection means provided on each of the disk guide members, and a drive means for differentially moving the two disk guide members in accordance with the output of the disk detection means, A disk loading device characterized in that said drive means drives said disk guide member only when output logic states of said two disk detection means are the same.