JP3988906B2 - Disc player and drive source control method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disc player, and in particular, simplification of a configuration for driving a pickup feeding mechanism that moves an optical pickup that reads an optical disc signal in a radial direction of the disc, and simplification of a configuration for detecting the state of the mechanism. The present invention relates to a technique for planning.
[0002]
[Prior art]
In a disc player such as a CD player that reads an optical disc signal, basically, a disc rotating mechanism that rotates the disc on the turntable, a disc attracting mechanism that draws the disc up to the turntable, and an optical that reads the optical disc signal. There are three types of mechanisms: a pickup feeding mechanism that moves the pickup in the radial direction of the disk.
[0003]
Conventionally, these mechanisms are individually driven by three types of motors individually provided for the three types of mechanisms. That is, first, since the disk rotation mechanism essentially requires immediate response and high speed rotation, it is directly driven by a disk rotation mechanism motor directly connected to the turntable.
[0004]
In addition, the disk attracting mechanism generally moves the disk in the horizontal direction and the vertical direction with respect to the surface of the turntable, so that in general, the transport roller and the disk for horizontally transporting the disk onto the turntable are connected to the turntable. Two types of operation members, ie, clamper members for chucking upward, and a shift plate for performing switching control of these two types of operation members are provided. Then, the shift plate is linearly driven by a disk calling mechanism motor to perform switching control between the transport roller and the clamper member, and the transport roller is rotationally driven.
[0005]
Furthermore, since the pickup feeding mechanism is essentially required to have high accuracy, the pickup screw mechanism is configured to accurately move the optical pickup linearly by a lead screw that directly engages with the optical pickup. It is rotationally driven by a pickup feed mechanism motor arranged in the vicinity.
[0006]
On the other hand, in order to smoothly switch the drive of each mechanism as described above and the mode switching of the control circuit / signal processing circuit at an appropriate timing, the disc player has a plurality of types of detection elements such as a detection sensor and a detection switch. in use. Specifically, a disc detection element for detecting the insertion and ejection completion of a disc, a chucking completion detection device for detecting the chucking completion of the disc loading mechanism, and detecting that the optical pickup is at the inner peripheral position An inner circumference detecting element or the like is provided. Further, these detection elements are used as follows, for example, as start / stop commands for switching the drive of each mechanism.
[0007]
First, the signal obtained by the disc detection element is used for a command for starting the disc attracting mechanism motor when the disc is inserted, a command for stopping the disc attracting mechanism motor when the disc ejection is completed, and the like. The signal obtained by the chucking completion detection element is used as a start command for the pickup feed mechanism motor and a stop command for the disk call mechanism motor at the time of transition from the disc loading operation to the disc reproduction operation. Further, the signal obtained by the inner circumference detection element is used for the start command of the disk rotation mechanism motor at the time of transition from the disk loading operation to the disk reproduction operation, and for the pickup feed mechanism at the time of transition from the disk reproduction operation to the disk ejection operation. It is used for a stop command for a motor or a disk rotation mechanism motor, a start command for a disk loading mechanism motor, or the like.
[0008]
Here, the inner circumference position of the optical pickup targeted by the inner circumference detection element is the TOC (Table of Contents) information, which is management information recorded in the inner circumference area (lead-in area) of the information recording area of the disc. It is a readable position. That is, in the disc reproducing operation by the optical pickup, first, the TOC information recorded in the lead-in area of the disc is read at the inner peripheral position, and the disc reproducing operation is started based on the TOC information. Yes. The inner circumference detection element is provided to detect that the optical pickup is in such an inner circumference position.
[0009]
[Problems to be solved by the invention]
However, the conventional disc player as described above has a problem that the number of motors and the number of detection elements are large, and the configuration becomes complicated.
[0010]
That is, as described above, in a configuration in which individual motors are used for the three types of mechanisms, that is, the disk rotating mechanism, the disk attracting mechanism, and the pickup feeding mechanism, three motors are required. In the mechanism, the use of such three motors increases the number of parts including the motor support member and the driving force transmission member, complicates the configuration, occupies a large space, and removes the surrounding members. This limits the layout and design, and makes the entire mechanism larger and more complex. In addition, the number of wires increases due to the relationship of supplying power to each motor and controlling it individually. Furthermore, in terms of cost, the specific gravity of the motor in the entire mechanism is quite large, so the use of three motors is an obstacle to cost reduction.
[0011]
On the other hand, since the three types of mechanisms as described above are driven by individual motors, as described above, at least the disk detection element, the chucking completion detection element, and the inner circumference detection element are related to the mechanism drive switching. Three types of detection elements are required. Use of such three or more types of detection elements increases the wiring for detection elements. Although the detection element occupies a smaller space than the motor, the increase in the number of elements limits the arrangement and design of the peripheral members and complicates the entire mechanism.
[0012]
The present invention has been proposed in order to solve the above-described problems of the prior art. The first object of the present invention is to reduce the number of motors and the number of detection elements, and to provide a connection including wiring. By reducing the number of members, it is an object to provide a disk player with high operation reliability that can contribute to improvement in the degree of freedom of arrangement and design of members, miniaturization and simplification of the whole mechanism, and cost reduction.
[0013]
In addition, the second object of the present invention is to play back a disc from such a disc loading operation through a chucking completion detection and a pickup inner circumference detection by appropriately controlling the motor in such a small and simple disc player. It is to provide a highly practical drive source control method capable of smoothly performing a series of operations up to the operation.
[0014]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention selectively drives the disk attracting mechanism and the pickup feeding mechanism by a single drive source, and also detects the completion of chucking of the disk by the inner peripheral position detecting means. With this configuration, the number of drive sources and the number of detection means are reduced.
[0015]
That is, the disc player of the present invention basically includes a disc rotating mechanism for rotating the disc on the turntable, a disc attracting mechanism for bringing the disc up to the turntable, and an optical pickup for reading the optical disc signal. A pickup feeding mechanism that moves the optical pickup in the direction; and an inner circumference position detecting means that detects that the optical pickup is at an inner circumference position where an optical disc signal on the inner circumference side of the information recording area of the disc can be read.
[0016]
  The invention described in claim 1 has the following characteristics in the disc player as described above. First,The optical pickup is provided so as to be movable to the innermost peripheral position where the optical disk signal inside the inner peripheral position cannot be read. AndA selection mechanism for selectively transmitting a driving force from a single drive source to the disk attracting mechanism and the pickup feeding mechanism is provided.In a state where the optical pickup is at the innermost peripheral position,Automatic pick-up feed mechanism for driving force transmission destinationAnd either of the disk loading mechanismsIt is comprised so that it may switch to. The inner circumference position detecting means is configured to detect completion of chucking of the disk on the turntable using the operation of the optical pickup.
[0017]
  According to this configuration, since the selection mechanism can drive both the disk attracting mechanism and the pickup feeding mechanism using the driving force of a single drive source, the disk attracting mechanism and the pickup feeding mechanism can be driven individually. The number of drive sources can be reduced as compared with the case of driving by a source.
  Particularly, since the operation of the pickup feeding mechanism can be automatically started at the end of the disk calling operation, it is not necessary to detect the end of the disk calling operation for the purpose of starting the pickup feeding operation. Therefore, after the pickup feeding operation is started, it is possible to detect completion of chucking of the disc on the turntable by using the operation of the optical pickup by the inner circumference position detecting means. Thus, since the inner circumference position detecting means also serves as the chucking completion detecting means, the number of detecting means can be reduced by the amount that the dedicated chucking completion detecting means becomes unnecessary.
  In addition, the drive power transmission destination from the drive source is automatically switched to the pickup feed mechanism at the end of the disk loading operation, and the drive power transmission destination from the drive source is automatically switched at the end of the optical pickup return operation. Since it can be switched to the disk call-in mechanism, the operation reliability is excellent.
[0018]
According to a second aspect of the present invention, in the disc player according to the first aspect, the inner peripheral position detecting means moves outside the inner peripheral position by moving the optical pickup after completion of the disc attracting operation by the disc attracting mechanism. Is configured to detect the completion of disk chucking.
According to this configuration, it is possible to easily detect the completion of the chucking of the disk by using a slight operation of the pickup feeding operation after the completion of the disk calling operation. Further, after such chucking completion detection, the optical pickup can be returned to the inner peripheral position again to detect the pickup inner periphery. Therefore, when the pickup feeding operation is automatically performed following the end of the disk calling operation, the chucking completion detection and the pickup inner circumference detection are performed in this order only by adding a reciprocation operation of a slight distance near the inner circumference position. Can be done reliably.
[0019]
According to a third aspect of the present invention, in the disc player according to the second aspect, the inner circumferential position detecting means is in the first state when the optical pickup is in the inner circumferential position, and the optical pickup is in the inner circumferential position. It is characterized by being configured to switch to the second state when moved outward.
According to a fourth aspect of the present invention, in the disc player according to the third aspect, the inner circumferential position detecting means is pressed by the optical pickup when the optical pickup is at the inner circumferential position, and the optical pickup is moved to the inner circumferential position. It is a detection switch arranged so as to be separated from the optical pickup when moved outward.
According to the configuration described in claims 3 and 4 as described above, since the operation position of the optical pickup is reliably reflected in the state of the inner peripheral position detection means, the chucking is completed using the operation of the optical pickup. Detection and pickup inner circumference detection can be reliably performed in this order. In particular, according to the configuration of the fourth aspect, the detection switch can be mechanically and reliably switched according to the operating position of the optical pickup.
[0020]
According to a fifth aspect of the present invention, in the disc player according to any one of the second to fourth aspects, a control circuit is provided for controlling the driving source in accordance with a signal from the inner peripheral position detecting means. It is characterized by that.
According to this configuration, when the completion of chucking of the disk is detected by the inner circumferential position detection means by utilizing a slight operation to the outside of the optical pickup after the operation of the disk attracting mechanism is completed, the drive source is controlled by the control circuit. The direction of operation of the optical pickup can be switched inward by reversing. Then, the optical pickup is returned to the inner peripheral position using a slight return operation to the inside of the optical pickup, and when the inner peripheral position detecting means detects that the pickup is in the inner peripheral position, it is driven by the control circuit. The source is temporarily stopped, the optical pickup is stopped at that position, and the TOC information is read. Thereafter, the drive source is reversed again by the control circuit, the operation direction of the optical pickup is switched to the outside, and the disc reproduction operation can be started.
In this way, at the initial stage of the pickup feeding operation, the drive source is reversed and temporarily stopped by the control circuit, so that the drive control of the optical pickup detection operation and the disc reproduction operation can be performed easily and continuously. After the king completion detection and the pickup inner circumference detection are reliably performed in this order, the disc reproducing operation can be smoothly started subsequently.
[0021]
  According to a sixth aspect of the present invention, in the method for controlling the drive source for the disc player according to any one of the second to fifth aspects, the following is performed in order to reproduce the disc after the disc calling operation is completed. It is characterized by performing such a series of procedures. First, after completing the disk loading operation by the disk loading mechanism, operate the pickup feeding mechanism.In the innermost circumferential positionThe optical pickup is caused to perform an outward operation for detection. When the inner circumferential position detecting means detects the completion of the chucking of the disk during the outward detection operation, the drive source is reversed to switch the optical pickup operation direction to the inner side, Inward movement is performed. Further, when the inner circumferential position detecting means detects that the optical pickup is at the inner circumferential position during the inward operation for detection, the drive source is temporarily stopped to stop the optical pickup, and the optical pickup is stopped. Management information (TOC information) recorded in the inner peripheral area is read. After reading the management information of the disc, the drive source is reversed again to switch the operation direction of the optical pickup again to start the disc reproduction operation. By controlling a single drive source in such a procedure, it is possible to easily and continuously perform drive control of the optical pickup detection operation and the disk reproduction operation after the disk calling operation. That is, after the chucking completion detection and the pickup inner circumference detection are reliably performed in this order by a single drive source, the disc reproduction operation can be started smoothly. Therefore, a series of operations from the disk calling operation to the disk reproducing operation can be smoothly performed by switching and controlling a single drive source using the detection signal from the inner circumference position detecting means.
[0022]
According to a seventh aspect of the present invention, in the driving source control method according to the sixth aspect, when the insertion of a disk is detected by a disk detecting means provided in the vicinity of the disk calling mechanism, the driving source is activated. Then, the disk calling mechanism is operated by operating the disk calling mechanism.
After starting the disk calling operation in such a procedure, the optical pickup detecting operation and the disk reproducing operation as described in claim 7 can be continuously performed. In other words, a disc drive operation can be smoothly started after a disc driving operation is performed by a single drive source in response to the disc insertion, and subsequently chucking completion detection and pickup inner circumference detection are sequentially performed. Therefore, by switching and controlling a single drive source using the detection signals from the inner circumference position detecting means and the disk detecting means, a series of operations from the start of the disk calling operation by inserting the disk to the disk reproducing operation can be smoothly performed. It can be carried out.
[0023]
According to an eighth aspect of the present invention, in the drive source control method according to the sixth aspect of the present invention, the following series of steps are performed in order to eject the disc after reproducing the disc.
First, the optical pickup is caused to return inward by rotating the drive source and operating the pickup feeding mechanism after reproducing the disc. When the inner peripheral position detecting means detects that the optical pickup is in the inner peripheral position during the return operation, the disc pulling operation is performed by rotating the drive source and operating the disc calling mechanism. To do. Further, when the completion of ejecting the disc is detected by the disc detecting means provided near the disc attracting mechanism during the disc ejecting operation, the drive source is stopped and the operation is terminated.
By controlling a single drive source in such a procedure, after the disc is played, the return operation of the optical pickup and the disc ejection operation of the disc calling mechanism can be smoothly performed in this order, and the operation can be performed at an appropriate time. Can be terminated. Therefore, a series of operations from the return operation of the optical pickup to the disc ejection operation can be smoothly performed by controlling the single drive source using the detection signals from the inner circumference position detection means and the disc detection means. .
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments to which the present invention is applied will be specifically described below with reference to the drawings.
[0025]
[1. First Embodiment]
[1-1. Constitution]
1A and 1B are diagrams showing an initial state of a disc player according to a first embodiment to which the present invention is applied. FIG. 1A is a plan view and FIG. 1B is a side view. In the drawings, only main members according to the present invention are shown from the viewpoint of simplifying the drawings.
[0026]
As shown in FIG. 1, in the disc player according to the present embodiment, the selection mechanism 1 has a power motor (with respect to three mechanisms: a switching control mechanism 2, a transport roller driving mechanism 3, and a pickup feeding mechanism 4). It is provided to selectively transmit the driving force of the driving source 10. Here, both the switching control mechanism 2 and the transport roller driving mechanism 3 are components of the disk calling mechanism. However, since the driving force is individually transmitted from the selection mechanism 1, the switching control mechanism 2 and the transport roller driving mechanism 3 are separated for convenience. This mechanism will be described. In the figure, reference numeral 5 denotes a base plate that supports these mechanisms 1 to 4 and the power motor 10.
[0027]
The mechanism constructed on the base plate 5 in this way is supported in a floating state with respect to a chassis (not shown) at the time of disk reproduction, and is in an initial state as shown in FIG. In FIG. 1, the three lock plates 6 to 8 including the clamper lock plate 6 and the floating lock plates 7 and 8 provided on the base plate 5 are fixed at a fixed position with respect to the chassis. Further, in the figure, the base plate 5 is indicated by a two-dot chain line to be distinguished from other members, and is appropriately omitted from the viewpoint of simplifying the drawing. Further, reference numeral 9 in the drawing denotes a disk drive motor that is directly connected to the turntable and drives the disk to rotate. Below, the detailed structure of each mechanism including the selection mechanism 1 is demonstrated.
[0028]
[Selection mechanism]
As shown in FIG. 1A, a worm wheel 12 that is always meshed with a worm 11 provided on the shaft of the power motor 10 is disposed in the vicinity of the power motor 10. The worm wheel 12 is composed of an integrated large and small gear, and is always meshed with the worm 11 by the large diameter gear. Further, an idler plate 14 that is rotatable with respect to the shaft 13 of the worm wheel 12 is provided at a position overlapping the worm wheel 12, and a slight friction acts between the idler plate 14 and the worm wheel 12. It is like that.
[0029]
Here, the idler plate 14 includes a substantially rectangular portion that overlaps with the worm wheel 12 and a protruding portion that extends from the substantially rectangular portion. The idler plate 14 is attached to the shaft 13 at one corner portion of a substantially square portion, and the remaining three corner portions include the switching control mechanism 2, the transport roller driving mechanism 3, and the pickup feeding mechanism 4, respectively. Three idler gears 15 to 17 for transmitting the driving force are respectively attached. Each of these idler gears 15 to 17 is always meshed with the worm wheel 12 and is configured to turn with respect to the worm wheel 12 in accordance with the rotation of the idler plate 14 and to be connected to a corresponding mechanism. .
[0030]
That is, as shown in FIG. 1A, the idler plate 14 connects the switching control idler gear 15 to the switching control mechanism 2 and connects the conveying roller driving idler gear 16 to the conveying roller driving mechanism 3. As shown in FIG. 7A, the pickup feed idler gear 17 is rotated between a pickup feed position where it is connected to the pickup feed mechanism 4. A position restricting pin 14 a is attached to the tip of the protruding portion of the idler plate 14.
[0031]
[Switching control mechanism]
As shown in FIG. 1A, the switching control mechanism 2 is provided with a switching control gear 21 that can mesh with the switching control idler gear 15 of the selection mechanism 1 described above. The horizontal rotational driving force of the switching control gear 21 is converted into a vertical rotational driving force via a driving force converting mechanism 22 including a plurality of gears including intersecting gears, and integrated with one of the intersecting gears. Is transmitted to the pinion 23. As shown in FIG. 1B, this pinion 23 linearly drives a shift plate 25 for switching control via a rack plate 24.
[0032]
Here, the rack plate 24 is disposed so as to overlap with a part of the shift plate 25, and both members can be moved relatively slightly by a guide structure comprising a combination of a pair of guide grooves 24a and a pair of pins 25a. It has become. The rack plate 24 is urged toward the side overlapping the shift plate 25 by a spring 24b provided between the rack plate 24 and the shift plate 25. Further, reference numeral 24 c in the figure is a trigger engaging portion of the rack plate 24. That is, at the initial position, the rack plate 24 is in a state of disengagement from the pinion 23 as shown in FIG. 1B, and the trigger engagement portion 24c is a trigger when the horizontal conveyance of the disc is completed. Is pressed to move to the left side in the figure so as to mesh with the pinion 23.
[0033]
[Control configuration with shift plate]
As shown in FIG. 1B, the shift plate 25 includes a first cam hole 25b for switching and controlling the conveying roller member 30, and the clamper lock described above as shown in FIG. A second cam hole 25 c for switching and controlling the clamper member 26 via the plate 6 is provided, and a lock hole 25 d for restricting the position of the idler plate 14 is provided.
[0034]
Here, the clamper member 26 is a member for chucking the disc on the turntable. As shown in FIG. 1B, the clamper member 26 is rotatably provided by a shaft 26a and is urged downward on the chucking side by a spring (not shown). . Further, as described above, the clamper lock plate 6 is a member for fixing the base plate 5 at a fixed position with respect to the chassis and locking the clamper member 26 at the upper chucking release position. As shown in FIG. 1A, the clamper lock plate 6 is rotatably provided by a shaft 6a, and is urged to the release side by a spring (not shown). A pin 6b for restricting the position of the clamper member 26 is attached.
[0035]
Further, the transport roller member 30 is a member that rotates the roller for loading and ejecting the disc, and is provided so as to be rotatable by a shaft 30a. The position regulating pin 30b is attached to a part thereof.
[0036]
Below, the control structure of the conveyance roller member 30, the clamper member 26, and the idler plate 14 by the shift plate 25 is demonstrated separately.
[0037]
First, the pin 30 b of the transport roller member 30 is inserted into the first cam hole 25 b of the shift plate 25. In the initial position as shown in FIG. 1B, the shift plate 25 holds the conveying roller member 30 at the upper disk contact position, and moves forward from this state (operation toward the left side in the figure). ), The transport roller member 30 is rotated to the release side, and after the transport roller member 30 is moved to the final release position in the middle of the operation as shown in FIG. Is held in the release position.
[0038]
Further, the shift plate 25 is connected to a sub-shift plate 28 provided on the opposite side of the base plate 5 via a link mechanism 27 composed of a plurality of links, and moves in the same direction in synchronization. Although not shown, the sub-shift plate 28 is also provided with a cam hole similar to the first cam hole 25b of the shift plate 25, and a similar pin provided at the other end of the conveying roller member 30. Has been inserted. Then, both ends of the transport roller member 30 are supported by the sub shift plate 28 and the shift plate 25, and the transport roller member 30 is rotated to the release side by the forward movement operation from the initial position, and finally the transport roller member. 30 is held in the release position.
[0039]
A pin 6 b of the clamper lock plate 6 is inserted into the second cam hole 25 c of the shift plate 25. The shift plate 25 holds the clamper lock plate 6 at the initial rotation position (floating lock position) at the initial position as shown in FIG. 1A, as shown in FIG. The clamper lock plate 6 is brought into contact with the lower surface of the clamper member 26 to lock the clamper member 26 in the upper chucking release position. Further, the shift plate 25 starts the rotation of the clamper lock plate 6 to release the floating lock in the later stage of the forward movement operation as shown in FIG. 5A, and then, as shown in FIG. In the chucking completion position, the clamper lock plate 6 is moved to the chucking side rotation position, and the clamper member 26 is released from the clamper lock plate 6 as shown in FIG. It is designed to be moved to the lower chucking position by the urging force of no spring.
[0040]
On the other hand, the above-described pin 14 a of the idler plate 14 is inserted into the lock hole 25 d of the shift plate 25. Then, the shift plate 25 locks the idler plate 14 to the disk loading position from the initial position as shown in FIG. 1A to the calling completion position as shown in FIG. After this, the idler plate 14 is released.
[0041]
In the initial position as shown in FIG. 1A, the shift plate 25 holds the clamper lock plate 6 in the floating lock position by the second cam hole 25c as described above. 27, the floating lock plates 7 and 8 are held in the floating lock position. Here, the floating lock plates 7 and 8 are rotatably provided by the shafts 7a and 8a, respectively, and the floating lock position as shown in FIG. 1A and the state shown in FIG. 6A. It is designed to rotate between such release positions. On the other hand, the link mechanism 27 is provided with two pairs of position restricting portions 27a to 27d for individually restricting the position by contacting the edges of the floating lock plates 7 and 8, respectively.
[0042]
That is, the shift plate 25 holds the lock plates 6 to 8 in the floating lock state at the initial position as shown in FIG. 1A, and during the forward movement as shown in FIG. The rotation of the floating lock plates 7 and 8 is started by the position restricting portions 27a and 27c of 27, and the floating lock on one side of the base plate 5 is released. Further, the shift plate 25 starts the rotation of the clamper lock plate 6 and releases the floating lock on the opposite side of the base plate 5 in the later stage of the forward movement operation as shown in FIG. Yes.
[0043]
[Conveyance roller drive mechanism]
In this embodiment, the driving force system for inserting and ejecting the disc in the horizontal direction by rotating the transport roller member 30 arranged on the disc insertion port side (left side in the figure) of the disc player is switched control. It is provided as a transport roller driving mechanism 3 that is independent from the driving force system of the mechanism 2.
[0044]
As shown in FIG. 1A, the transport roller driving mechanism 3 includes a transport roller driving gear 31 that can mesh with the transport roller driving idler gear 16 of the selection mechanism 1 described above. The horizontal rotational driving force of the transport roller driving gear 31 is converted into a vertical rotational driving force via a driving force conversion mechanism 32 composed of intersecting gears and shafts, and transmitted to a gear 33 integrated with the shaft. It has come to be. As shown in FIG. 1B, a connecting gear 34 that always meshes with the gear 33 is provided above the gear 33, and the connecting gear 34 can mesh with the conveying gear 30 c of the conveying roller member 30. It has become.
[0045]
Here, the conveyance gear 30c is provided coaxially with a conveyance roller (not shown), and is configured to operate integrally with the conveyance roller. As illustrated in FIG. When in the disk contact position, it engages with the connecting gear 34. The transport gear 30c is rotated by the driving force of the power motor 10 transmitted via the connecting gear 34, and a transport roller (not shown) operating integrally with the transport gear 30c is connected to the loading side (clock shown in the figure). Direction) or eject side (counterclockwise in the figure).
[0046]
[Pickup feed mechanism]
As shown in FIG. 1A, the pickup feeding mechanism 4 for moving the optical pickup 40 for reading an optical disk signal in the radial direction of the disk is first a pickup that can mesh with the pickup feeding idler gear 17 of the selection mechanism 1 described above. A feed gear 41 is provided. The rotational driving force in the horizontal direction of the pickup feed gear 41 is converted into a rotational driving force in the orthogonal direction via a driving force conversion mechanism 42 composed of intersecting helical gears and transmitted to the lead screw 43.
[0047]
The optical pickup 40 is directly engaged with the lead screw 43 at one end, and is linearly driven in the axial direction of the lead screw 43 by the rotation of the lead screw 43. The other end of the optical pickup 40 is slidably supported by a slide guide 44. The operation range of the optical pickup 40 is changed from the innermost peripheral position as shown in FIG. 1A to FIG. 7A to the inner peripheral position as shown in FIG. To the outermost peripheral position as shown in FIG.
[0048]
Here, as described above, the inner circumferential position is a position where the optical pickup 40 is always set to start reading first when the disk is reproduced, and the inner circumferential area (lead-in area) of the signal recording area of the disk. This is a position where the pickup lens 40a can read TOC information, which is management information recorded in the area. The innermost circumferential position is a position inside the inner circumferential position where the optical disc signal cannot be read.
[0049]
Further, the pickup feeding mechanism 4 is provided with an idler lock plate 45 for engaging with the pin 14a of the idler plate 14 to lock the idler plate 14 at the pickup feeding position. The idler lock plate 45 is provided so as to be movable in parallel with the optical pickup 40, is biased toward the lock side by a spring 46, and is configured to engage with a part of the optical pickup 40.
[0050]
Here, the idler lock plate 45 is engaged with the optical pickup 40 and held in the release position when the optical pickup 40 is in the innermost peripheral position as shown in FIG. It is like that. The idler lock plate 45 is released from the optical pickup 40 when the optical pickup 40 moves from the innermost peripheral position to the inner peripheral position as shown in FIG. It moves to the lock side by the force and engages with the pin 14a of the idler plate 14 to lock the idler plate 14 at the pickup feed position.
[0051]
[Status detection mechanism]
As shown in FIG. 1A, in the vicinity of the optical pickup 40, a detection switch (inner circumference) for detecting both inner circumference detection and chucking completion detection using the operation of the optical pickup 40 is provided. Position detection means) 51 is provided, and constitutes a state detection mechanism together with the optical pickup 40. In this case, since the lead screw 43 side of the optical pickup 40 has a large number of parts and a small empty space, the detection switch 51 is arranged by effectively using the empty space on the side opposite to the lead screw 43.
[0052]
The detection switch 51 is connected to the control circuit 90 together with the disk drive motor 9 and the power motor 10. Although not shown, a disc detection means comprising a plurality of optical sensors is provided in the vicinity of the conveying roller member 30 on the disc insertion opening side (left side in the figure) of the disc player, and is controlled together with the detection switch 51. The circuit 90 is connected. The control circuit 90 is configured to control the disk drive motor 9 and the power motor 10 in accordance with detection signals from the detection switch 51 and the disk detection means.
[0053]
FIG. 10 is an enlarged plan view showing details of such a state detection mechanism, and particularly shows an initial state. In FIG. 10, a lead-in area 50 of a disk arranged on a turntable is shown. The detection switch 51 is pressed or released by a pressing portion 40 b provided at one end of the optical pickup 40 in accordance with the operation of the optical pickup 40 with respect to the lead-in area 50.
[0054]
That is, the detection switch 51 and the pressing portion 40b are pressed by the detection switch 51 within the range from the innermost peripheral position as shown in FIG. 10 to the inner peripheral position as shown in FIG. The detection switch 51 is arranged and configured to be released from the pressing portion 40b when it is pressed by the portion 40b and the optical pickup 40 moves to the outside from the inner peripheral position as shown in FIG.
[0055]
[1-2. Action]
In the disc player according to the present embodiment having the above-described configuration, the switching control mechanism 2 and the transport roller driving mechanism are utilized by using the driving force of the single power motor 10 by the selection mechanism 1 according to the present invention. 3 and the pickup feeding mechanism 4 can be driven, and both the chucking completion detection and the pickup inner circumference detection are performed by a single detection switch 51 following the disk loading by the disk calling mechanism. It can be performed.
[0056]
Hereinafter, the initial state, a series of operations from the disk loading operation to the reproduction operation, and the ejection operation will be sequentially described with reference to FIGS. Here, FIGS. 1 to 9 are diagrams showing different states of the disc player, in which (A) is a plan view and (B) is a side view, respectively. 10 to 12 are enlarged plan views showing different states of the state detection mechanism. Further, FIG. 13 is a flowchart showing an outline of an operation procedure of the control circuit 90 for performing the chucking completion detection and the pickup inner circumference detection using the operation of the optical pickup 40.
[0057]
[initial state]
As shown in FIG. 1A, in the initial state, the idler lock plate 45 is held at the release position by the optical pickup 40 at the innermost peripheral position, and the pin 14a of the idler plate 14 of the selection mechanism 1 is Since it is in the lock portion of the lock hole 25d of the shift plate 25 of the switching control mechanism 2, the idler plate 14 is locked at the disk loading position. As a result, the switching control idler gear 15 and the switching control gear 21 are engaged with each other, and the conveying roller driving idler gear 16 and the conveying roller driving gear 31 are engaged with each other.
[0058]
In this case, the transport roller member 30 of the transport roller driving mechanism 3 is in the upper disk contact position by the first cam hole 25b of the shift plate 25, and the transport gear 30c is engaged with the connecting gear 34. The gear 30 c is connected to the transport roller driving gear 31. On the other hand, in the switching control mechanism 2, the shift plate 25 is disconnected from the switching control gear 21 because the rack plate 24 and the pinion 23 are disengaged.
[0059]
The clamper lock plate 6 and the floating lock plates 7 and 8 are also held in the floating lock position because the shift plate 25 is in the initial position. Since the clamper lock plate 6 is held at the floating lock position, the clamper member 26 is also locked at the upper chucking release position.
[0060]
On the other hand, as shown in FIG. 10, in the initial state, the optical pickup 40 is located at the innermost peripheral position where the center of the pickup lens 40a is inside the lead-in area 50 of the disk, and the pressing portion 40b. Therefore, the detection switch 51 is pressed.
[0061]
[Disc loading / playback operation]
(1) Horizontal conveyance of disc
In the initial state as described above, when a disc is inserted from the disc insertion slot side (left side in the figure) of the disc player, the control circuit 90 responds to a disc insertion detection signal from a disc detection means (not shown). The power motor 10 is activated. The driving force of the power motor 10 causes the worm wheel 12 to rotate counterclockwise in the figure, and the conveying roller of the conveying roller driving mechanism 3 via the clockwise rotation of the conveying roller driving idler gear 16 of the selection mechanism 1 in the figure. The driving gear 31 rotates counterclockwise in the figure, and the conveying gear 30c connected to the conveying roller driving gear 31 rotates clockwise in the figure. As a result, a transport roller (not shown) that operates integrally with the transport gear 30c rotates to the loading side (clockwise in the figure), and the inserted disk is transported horizontally onto the turntable. Further, since the driving force of the power motor 10 is also transmitted to the switching control gear 21 of the switching control mechanism 2 via the switching control idler gear 15 of the selection mechanism 1, the switching control gear 21 and the switching control gear 21 are always in contact with the disk during horizontal conveyance. The pinion 23 in the connected state is also rotating.
[0062]
(2) Shift plate start-up / conveyance roller release
When the disk is transported to the turntable by the operation of the transport roller driving mechanism 3 as described above, the rack plate 24 is moved to the left in the drawing by the trigger of the operation member related to the positioning when the horizontal transport of the disk is completed. Engage with the pinion 23. At this time, the pinion 23 is rotated counterclockwise in the figure by the driving force of the power motor 10, and therefore the rack plate 24 starts to advance toward the left side in the figure by the rotation of the pinion 23. In this case, the rack plate 24 moves forward by a fixed stroke, that is, a relative movement distance between the guide groove 24a and the shift plate 25 defined by the pin 25a, and engages with the shift plate 25 (FIG. 2).
[0063]
Thereafter, the rack plate 24 and the shift plate 25 move forward integrally, and the pin 30b of the transport roller member 30 is pressed downward by the cam portion of the first cam hole 25b in the shift plate 25. Therefore, the transport roller member The downward rotation 30 is the release side (FIG. 3). It should be noted that the idler plate 14 is reliably locked at the disk loading position because the pin 14a moves in the lock portion of the lock hole 25d during the operation of the shift plate 25.
[0064]
▲ 3 ▼ Unlock floating lock and start chucking
When the shift plate 25 moves forward from the state shown in FIG. 3 and reaches approximately the middle point of the operation stroke, the pin 30b of the transport roller member 30 is moved to the first cam hole of the shift plate 25 as shown in FIG. The switching point between the cam portion and the relief portion in 25b is reached, and the conveying roller member 30 reaches the final release position. Thereafter, the pin 30b of the transport roller member 30 moves horizontally within the relief portion of the first cam hole 25b of the shift plate 25, so that the transport roller member 30 is held at the final release position. Further, when the conveying roller member 30 reaches the final release position in this way, the floating lock plates 7 and 8 are pressed by the position restricting portions 27a and 27c of the link mechanism 27 and start to rotate, The floating lock on one side of the base plate 5 is released. On the other hand, the clamper lock plate 6 is still held in the floating lock position, and the clamper member 26 is locked in the upper chucking release position.
[0065]
When the shift plate 25 further advances from the state of FIG. 4 and enters the latter half of the operation, the pin 6b of the clamper lock plate 6 is moved by the second cam hole 25c of the shift plate 25 as shown in FIG. When pressed, the clamper lock plate 6 starts rotating, so that the floating lock of the base plate 5 is completely released. At the same time, as the clamper lock plate 6 rotates, the clamper lock plate 6 moves along the inclined surface at the bottom of the clamper member 26, so that the clamper member 26 faces downward on the chucking side by the biasing force of the spring. To start turning.
[0066]
▲ 4 ▼ Chucking complete
When the shift plate 25 further advances from the state of FIG. 5 and reaches the foremost position, the clamper lock plate 6 reaches the final release position as shown in FIG. 6A, and FIG. In order to completely release the clamper member 26, the clamper member 26 reaches the lower chucking position and chucks the disc on the turntable. At this time, since the pin 14a of the idler plate 14 reaches the switching point between the lock portion and the escape portion in the lock hole 25d of the shift plate 25, the idler plate 14 can be rotated to the pickup feed position side. It becomes.
[0067]
(5) Drive switching
As described above, as the worm wheel 12 rotates counterclockwise in the drawing after the shift plate 25 has reached the foremost position, the idler plate 14 is caused to friction by the friction between the worm wheel 12 and the idler plate 14. It rotates counterclockwise, and its pin 14a moves in the escape portion in the lock hole 25d of the shift plate 25. With the rotation of the idler plate 14, the switching control idler gear 15 is disconnected from the switching control gear 21, and the conveying roller driving idler gear 16 is disconnected from the conveying roller driving gear 31. When the idler plate 14 reaches the pickup feeding position, the pickup feeding idler gear 17 meshes with the pickup feeding gear 41 of the pickup feeding mechanism 4 as shown in FIG.
[0068]
(6) As a result of drive switching as described above, detection of optical pickup start / chucking completion and pickup inner circumference detection, pick-up feed is accompanied by rotation of the worm wheel 12 counterclockwise in the figure by the driving force of the power motor 10 The idler gear 17 rotates in the clockwise direction in the drawing, and the pickup feeding gear 41 of the pickup feeding mechanism 4 rotates in the counterclockwise direction in the drawing. As the pickup feed gear 41 rotates, the lead screw 43 rotates, and the optical pickup 40 starts moving from the innermost peripheral position as shown in FIG. 10 to the outside (rightward in the figure).
[0069]
As shown in FIG. 11, when the optical pickup 40 moves to the inner peripheral position where the center of the pickup lens 40a overlaps the lead-in area 50 of the disc, the idler lock plate 45 is released from the optical pickup 40. The urging force of the spring 46 engages with the pin 14a of the idler plate 14 to lock the idler plate 14 at the pickup feeding position. Therefore, in a state where the optical pickup 40 is at the inner peripheral position or a position outside the inner peripheral position, the idler plate 14 is reliably locked at the pickup feeding position by the idler lock plate 45. The driving force transmission system is maintained.
[0070]
Then, using the operation of the optical pickup 40 following this operation, the chucking completion detection and the pickup inner circumference detection are sequentially performed. FIG. 13 is a flowchart showing an outline of an operation procedure of the control circuit for performing a series of detections using such an operation of the optical pickup 40. Hereinafter, the details of the operation procedure will be described with reference to FIG.
[0071]
First, when the optical pickup 40 has reached the inner peripheral position as shown in FIG. 11 from the innermost peripheral position as shown in FIG. When it moves to, it moves away from the detection switch 51. That is, as shown in FIG. 12, when the center of the pickup lens 40a moves outside the lead-in area 50 of the disc, the pressing portion 40b is separated from the detection switch 51 and releases the detection switch 51. By this operation, the detection switch 51 is turned off, and chucking completion detection is performed. That is, as shown in FIG. 13, the control circuit 90 continues to rotate the power motor 10 continuously during disk loading (step 101) to move the optical pickup 40 outward, but the detection switch 51 is turned off. When it is determined that the switching has been performed (step 102), the completion of chucking is detected, and the power motor 10 is stopped (step 103).
[0072]
In this case, the control circuit 90 temporarily stops the power motor 10 and then reverses it (step 104), thereby reversing the operation direction of the optical pickup 40 and moving it inward. Then, when the optical pickup 40 is moved again from the position outside the inner peripheral position as shown in FIG. 12 to the inner peripheral position as shown in FIG. 11, the detection switch 51 once released is again in the optical pickup 40. It is pressed by the pressing portion 40b to be in the ON state, and the pickup inner circumference is detected. That is, as shown in FIG. 13, when the control circuit 90 determines that the detection switch 51 has been turned on (step 105), it detects the inner circumference of the pickup and stops the power motor 10 (step 106). Start reading the TOC.
[0073]
(7) Disc playback
As described above, the control circuit 90 temporarily stops the power motor 10 in response to detection of the inner circumference of the pickup by the detection switch 51. At the same time, the control circuit 90 starts the disk drive motor 9 to rotate the disk, and the optical pickup 40 As a result, the TOC information recorded in the lead-in area 50 of the disc is read.
[0074]
After reading such TOC information, the optical pickup 40 reaches the outermost peripheral position shown in FIG. 9A from the inner peripheral position shown in FIG. 8A by the rotation of the disk and the movement of the optical pickup 40. Disc playback corresponding to the signal amount up to is possible.
[0075]
[Returning optical disc and ejecting disc]
The recovery operation of the optical pickup and the subsequent disc eject operation after disc playback are basically the opposite of the disc loading / reproducing operations (1) to (7) described above except that the disc drive motor 9 is not started. (7) 'to (1)' are performed (operation from FIG. 9 to FIG. 1).
[0076]
▲ 7 ▼ ´Restart of optical pickup
The control circuit 90 reverses the power motor 10 in response to an eject command or the like based on an eject operation or the like at the end of disc playback. Due to the driving force of the power motor 10, the worm wheel 12 is rotated in the clockwise direction in the figure, and the pickup feed gear 41 of the pickup feed mechanism 4 is rotated in the clockwise direction in the figure. Therefore, the lead screw 43 rotates in the opposite direction to that during loading, and the optical pickup 40 starts moving at a high speed from the outer peripheral position toward the inside.
[0077]
▲ 6 ▼ ´Return completion of optical pickup
When the optical pickup 40 that has started high-speed movement as described above reaches the inner peripheral position as shown in FIG. 8A, the lock of the idler plate 14 by the idler lock plate 45 starts to be released. Further, as described above, when the optical pickup 40 reaches the inner circumferential position, the detection switch 51 is switched from the OFF state to the ON state by the operation of the optical pickup 40 as shown in FIG. Then, the rotation of the power motor 10 is continued as it is. As a result, the optical pickup 40 returns to the innermost peripheral position as shown in FIG. When returning to the innermost peripheral position as described above, the optical pickup 40 is engaged with the idler lock plate 45 and moved to the release position as shown in FIG. 14 is released from the idler lock plate 45.
[0078]
▲ 5 ▼ ´Drive switching
As described above, with the rotation of the worm wheel 12 in the clockwise direction in the drawing after the optical pickup 40 reaches the innermost peripheral position, the idler plate 14 is shown in the figure by the friction between the worm wheel 12 and the idler plate 14. The pin 14a moves in the escape portion in the lock hole 25d of the shift plate 25 by rotating in the middle clockwise direction. As the idler plate 14 rotates, the pickup feed idler gear 17 is separated from the pickup feed gear 41. When the idler plate 14 reaches the disk loading position, as shown in FIG. 6A, the switching control idler gear 15 is engaged with the switching control gear 21, and the conveying roller driving idler gear 16 is conveyed to the conveying roller driving gear. Mesh with 31.
[0079]
▲ 4 ▼ ´Chucking release
As a result of the drive switching as described above, as the worm wheel 12 is rotated in the clockwise direction in the drawing by the driving force of the power motor 10, the pinion 23 is rotated and the rack plate 24 and the shift plate 25 are moved backward together. Start. As the shift plate 25 moves backward, as shown in FIG. 5A, the clamper lock plate 6 starts to rotate toward the floating lock, and as shown in FIG. 26 begins to rotate toward the upper chucking release position.
[0080]
At this time, as shown in FIG. 5A, the pin 14a of the idler plate 14 is located in the lock portion of the lock hole 25d of the shift plate 25, so that the shift plate 25 moves backward thereafter. In the meantime, the idler plate 14 is held at the disk loading position by the lock hole 25d of the shift plate 25. At this time, as shown in FIG. 5B, the conveyance roller member 30 is in the lower release position, and the conveyance gear 30c is separated from the conveyance roller drive gear 31, so that the conveyance roller rotates. Never do.
[0081]
▲ 3 ▼ ´ Floating lock / chucking complete
When the shift plate 25 further retreats from the state of FIG. 5 and reaches almost the middle point of the operation stroke, the clamper lock plate 6 reaches the floating lock position and the clamper member 26 is moved as shown in FIG. The upper chucking release position is reached. At this time, the floating lock plates 7 and 8 also start to rotate toward the floating lock by the position restricting portions 27a and 27c of the link mechanism 27. At this time, as shown in FIG. 4B, the pin 30b of the transport roller member 30 reaches the switching point between the cam portion and the relief portion in the first cam hole 25b of the shift plate 25. Therefore, it can be rotated by the backward movement of the shift plate 25 thereafter.
[0082]
When the shift plate 25 further retracts from the state of FIG. 4 and returns to the vicinity of the initial position, the floating lock plates 7 and 8 reach the floating lock position as shown in FIG. As a result, the mechanism configured on the base plate 5 is fixed at a fixed position with respect to the chassis. Further, at this time, as shown in FIG. 3A, the conveying roller member 30 is biased upward by a spring (not shown) so as to rotate upward. The conveyance gear 30c meshes with the connecting gear 34. As a result, the conveyance roller that operates integrally with the conveyance gear 30c starts to rotate toward the eject side (counterclockwise in the figure). Absent.
[0083]
▲ 2 ▼ ´ Stop shift plate and contact transport roller
As shown in FIG. 2A, when the shift plate 25 returns to the initial position, as shown in FIG. 2B, the transport roller member 30 reaches the upper disk contact position, and the disk It can be transported. Even after the shift plate 25 returns to the initial position, the rack plate 24 engaged with the pinion 23 moves backward by a fixed stroke with respect to the shift plate 25 and is separated from the pinion 23 as shown in FIG. Return to the initial position.
[0084]
▲ 1 ▼ ´ Horizontal transport of disc
As shown in FIG. 2B, after the conveying roller member 30 reaches the upper disk contact position, the disk is removed from the turntable by the rotation of the conveying roller toward the eject side (counterclockwise in the figure). It is transported horizontally toward the disc insertion slot and reaches a position where it can be removed from the outside. At this point, the control circuit 90 stops the power motor 10 in response to a disc ejection completion signal from a disc detection means (not shown).
[0085]
[1-3. effect]
As described above, according to the present embodiment, the selection mechanism 1 according to the present invention uses the driving force of a single power motor 10 to make a disk composed of the switching control mechanism 2 and the transport roller driving mechanism 3. Since both the attracting mechanism and the pickup feeding mechanism 4 can be driven, it is possible to reliably reduce one motor as compared with the conventional technique in which the disk attracting mechanism and the pickup feeding mechanism are driven by separate motors. Can do. That is, the entire mechanism can be driven only by using two motors, the disk drive motor 9 and the power motor 10.
[0086]
Therefore, the number of parts including the motor support member and the driving force transmission member can be reduced, the configuration can be simplified, and the occupied space can be reduced. Further, the degree of freedom in arrangement and design of members including a selection mechanism around the motor can be improved, and the power supply and control wiring related to the motor can be reduced.
[0087]
In addition, since the operation of the pickup feeding mechanism 4 can be automatically started at the end of the disk loading operation, it is not necessary to detect the completion of the chucking of the disc for the purpose of starting the pickup feeding operation as in the prior art. Therefore, after the operation of the optical pickup 40 is started, it is possible to detect the completion of the chucking of the disk by the detection switch 51 using the operation of the optical pickup 40.
[0088]
That is, as a result of mechanically switching the drive, as in the present embodiment, by using the operation of the optical pickup 40, the chucking completion detection and the pickup inner circumference detection are performed by the single detection switch 51. It is possible to do both. As a result, the number of detection elements can be reduced as compared with the prior art in which individual detection elements are provided for each detection, so that the wiring for the detection elements can also be reduced. Placement and design can be performed easily.
[0089]
Therefore, since at least one motor and one detection element can be reduced, the configuration of the entire mechanism can be reduced in size and simplified. Further, the cost for one motor can be reduced, which is economically advantageous.
[0090]
On the other hand, at the end of the disk loading operation, the transmission destination of the driving force from the power motor 10 is automatically switched to the pickup feeding mechanism 4 and at the end of the return operation of the optical pickup 40, the transmission destination of the driving force from the power motor 10 is completed. Can be automatically switched to the disk call-in mechanism (the switching control mechanism 2 and the transport roller driving mechanism 3), so that the operation reliability is excellent.
[0091]
Further, the chucking completion detection and the pickup inner circumference detection by the detection switch 51 only add a reciprocation operation at a slight distance in the vicinity of the inner circumference position during the pickup feeding operation. It does not become long, and sufficient operability can be secured. In particular, the detection switch 51 can be reliably switched to the ON / OFF state by the operation of the optical pickup 40, and the operation direction of the optical pickup 40 can be reliably switched by the control circuit 90 according to the state of the detection switch 51. Therefore, it is possible to reliably detect the chucking completion detection and the pickup inner circumference detection, and the operation reliability is excellent.
[0092]
Further, by controlling the disk drive motor 9 and the power motor 10 by the control circuit 90 in accordance with signals from the detection switch 51 for detecting chucking completion and detecting the inner circumference of the pickup and the disk detection means for detecting the disk, The entire operation of the disc player can be performed smoothly. In other words, a series of operations from the start of the disc loading operation by inserting the disc to the disc reproduction operation can be smoothly performed, and after the disc reproduction, the series of operations from the recovery operation of the optical pickup to the disc ejection operation is smoothly performed. Therefore, it is excellent in practicality.
[0093]
[2. Second Embodiment]
[2-1. Constitution]
14 and 15 are diagrams showing a disc player according to a second embodiment to which the present invention is applied, and the configuration of the driving force transmission system and the state detection mechanism in the first embodiment is changed. One embodiment of this is shown. Among these, FIG. 14 is a plan view showing only main members on the drive side from the viewpoint of simplifying the drawing. FIG. 15 is an enlarged plan view showing only the configuration around the state detection mechanism. Since the configuration of the disc player according to the present embodiment has many parts in common with the first embodiment, only the parts different from the first embodiment will be described in the following description.
[0094]
[Driving power transmission system]
As shown in FIG. 14, the selection mechanism 60 in the present embodiment is configured to selectively transmit the driving force of the power motor 10 to the two mechanisms of the disk attracting mechanism 70 and the pickup feeding mechanism 4. ing. In other words, in the present embodiment, the driving force transmission system separated into the switching control mechanism 2 and the transport roller driving mechanism 3 in the first embodiment is replaced with a single driving force transmission called a disk calling mechanism 70. In addition to being integrated into the system, the configuration of the selection mechanism 60 is changed. Below, the detailed structure of such a selection mechanism 60 and the disk attracting mechanism 70 is demonstrated.
[0095]
First, in the selection mechanism 60, the shaft 63 of the drive gear 62 is not positioned at a position overlapping the drive gear 62 that always meshes with the worm wheel 61, but the worm wheel 61 that always meshes with the worm 11 provided on the shaft of the power motor 10. Is provided with an idler plate 64 that can be rotated relative to the rotation. The idler plate 64 is formed in a substantially inverted J shape, and is attached to the shaft 63 at the tip of the straight line side, and a single idler gear 65 is attached to the center thereof. The idler plate 64 rotates between a disk loading position where the idler gear 65 is coupled to the disk loading mechanism 70 and a pickup feeding position where the idler gear 65 is coupled to the pickup feeding mechanism 4. A position regulating pin 64 a is attached to the tip of the idler plate 64 on the curved portion side.
[0096]
In addition, the disc attracting mechanism 70 is provided with a disc attracting gear 71 that can mesh with the idler gear 65 of the selection mechanism 1, and the rotational driving force of the disc attracting gear 71 is the first driving force converting mechanism 72 and the pinion. 73 is transmitted to the rack plate 74 and the shift plate 75, and these plates 74 and 75 are linearly driven.
[0097]
In the drawing, only the state where the idler plate 64 is inserted into the lock hole 75a provided in the shift plate 75 is shown, and the engagement relationship with other members is not shown. In practice, however, cam holes and the like similar to those of the first embodiment are provided, and switching control of the transport roller member and the clamper member is performed according to the position of the shift plate 75. On the other hand, the rotational driving force of the disk pull-in gear 71 is also transmitted to the gear 77 via the second driving force conversion mechanism 76, and this gear 77 provides the rotational driving force of the conveyance roller (not shown). It has become.
[0098]
Further, in the pickup feeding mechanism 4, the pickup feeding gear 81 is composed of an integrated large and small gear having a larger diameter than the pickup feeding gear 81 in the first embodiment. The rotational driving force in the horizontal direction of the pickup feed gear 81 is converted into a rotational driving force in the orthogonal direction via a driving force conversion mechanism 82 composed of intersecting gears and transmitted to the lead screw 43. Yes.
[0099]
[Status detection mechanism]
As shown in FIG. 15, in the present embodiment, contrary to the first embodiment, a detection switch 52 is provided on the screw holder 40c side of the optical pickup 40, and this detection switch 52 is The spring portion 40d is provided so as to protrude from a part of the screw holder 40c.
[0100]
As in the first embodiment, the detection switch 52 and the spring portion 40d are within the range from the innermost position to the inner position as shown in FIG. When the detection switch 52 is pressed by the spring portion 40d and the optical pickup 40 moves outside the inner peripheral position, the detection switch 51 is released from the spring portion 40d.
[0101]
[2-2. Action / Effect]
According to the present embodiment having the above configuration, the following operation is obtained.
That is, during the disk loading / ejecting operation, the idler plate 64 is locked at the disk loading position by the shift plate 75, and the disk loading mechanism 70 can be reliably driven by the driving force of the power motor 10. In the disk reproducing operation and the optical pickup returning operation, the idler plate 64 is locked at the pickup feeding position by the idler lock plate 45, and the pickup feeding mechanism 4 is reliably driven by the driving force of the power motor 10. it can.
[0102]
When the optical pickup 40 is at the innermost peripheral position, the detection switch 52 is pressed by the spring portion 40d of the optical pickup 40, and the optical pickup 40 passes through the inner peripheral position from the innermost peripheral position. When moving to a position outside the circumferential position, the detection switch 52 is released, and chucking completion detection is performed. Then, when the optical pickup 40 is reversed and moved to the inner peripheral position in response to the detection of the completion of chucking, the detection switch 52 once released is pressed again by the spring portion 40d of the optical pickup 40, and the inner periphery of the pickup is detected. Detection is performed.
[0103]
As described above, in the present embodiment as well, as with the first embodiment, the disk loading mechanism 70 and the pickup feeding mechanism 4 can be driven by the driving force of the single power motor 10, and By using the operation of the optical pickup 40, it is possible to detect the completion of chucking and the inner circumference of the pickup by a single detection switch 52.
[0104]
[3. Other Embodiments]
The present invention is not limited to the above-described embodiments, and various other forms can be implemented within the scope of the present invention. For example, a specific configuration of the selection mechanism and a configuration of a driving force transmission system from the selection mechanism to the disk loading mechanism and the pickup feeding mechanism can be appropriately selected. In addition, specific configurations such as the inner circumference position detection means and the disk detection means can be selected as appropriate, and the specific configuration and control target of the control circuit can also be selected as appropriate, and the operation procedure according to such configuration Can be set freely. Further, the specific configuration of the disk attracting mechanism and the pickup feeding mechanism can be selected as appropriate.
[0105]
More specifically, the present invention can be applied to various types of disc players targeting one or more types of optical discs selected from optical discs including CD, MD, LD, DVD, etc. In addition, the excellent effects as described above can be obtained.
[0106]
【The invention's effect】
As described above, according to the present invention, the disk attracting mechanism and the pickup feeding mechanism are selectively driven by a single drive source, and both the chucking completion detection and the pickup inner circumference detection are performed by a single detection means. By performing the above, the number of drive sources and detection means can be reduced. Therefore, the number of motors and detection elements can be reduced, and the number of related members including wiring can be reduced. The arrangement and design freedom of members can be improved, and the whole mechanism can be reduced in size and simplified. It is possible to provide a disc player with high operational reliability that can contribute to cost reduction.
[0107]
In addition, the drive source control method according to the present invention is suitable for such a small and simple disc player, and by appropriately controlling the drive of the motor, the disc loading operation is detected and the pickup inner circumference is detected. Since a series of operations up to the disc playback operation can be performed smoothly, it is excellent in practicality.
[Brief description of the drawings]
1A and 1B are diagrams showing an initial state of a disc player according to a first embodiment to which the present invention is applied, in which FIG. 1A is a plan view and FIG. 1B is a side view.
2 is a diagram showing a state when the rack plate is engaged with the pinion from the initial state of FIG. 1 and the operation of the shift plate is started from the initial state of FIG. 1, (A) is a plan view, (B) Is a side view.
3 is a diagram illustrating a state in which the release operation of the transport roller is started by the advancement of the shift plate from the state of FIG. 2 in the disc player of FIG. 1, wherein (A) is a plan view and (B) is a side view It is.
4 is a diagram showing a state in which the floating lock releasing operation is started by the advancement of the shift plate from the state of FIG. 3 in the disc player of FIG. 1, (A) is a plan view, and (B) is a side view. It is.
5 is a diagram showing a state in which the chucking operation is started by the advancement of the shift plate from the state of FIG. 4 in the disc player of FIG. 1, (A) is a plan view, and (B) is a side view. .
6 is a diagram showing a state in which the shift plate has reached the foremost position from the state of FIG. 5 and the chucking operation has been completed in the disc player of FIG. 1, (A) is a plan view, and (B) is a side view. It is.
7 is a view showing a state where the idler plate is rotated to the pickup feeding position from the state shown in FIG. 6 and the drive is switched in the disc player shown in FIG. 1. FIG. 7A is a plan view, and FIG. It is a side view.
8 is a view showing a state in which the optical pickup has moved from the state shown in FIG. 7 to the inner peripheral position in the disc player shown in FIG. 1, (A) is a plan view, and (B) is a side view. .
9 is a diagram showing a state in which the optical pickup has reached the outermost peripheral position after performing disc reproduction from the state of FIG. 8 in the disc player of FIG. 1, (A) is a plan view, and (B) is a plan view. It is a side view.
10 is an enlarged plan view showing an initial state of a state detection mechanism using the operation of the optical pickup, in particular, in the disc player of FIG. 1. FIG.
11 is an enlarged plan view showing a state in which the optical pickup of FIG. 10 has reached the inner peripheral position.
12 is an enlarged plan view showing a state in which the optical pickup of FIG. 10 has reached a position outside the inner peripheral position.
13 is a flowchart showing an outline of an operation procedure of a control circuit for performing chucking completion detection and pickup inner circumference detection using the operation of the optical pickup in the disc player of FIG. 1 in particular.
FIG. 14 is a diagram showing a disc player according to a second embodiment to which the present invention is applied, and in particular, a plan view showing only main members on the driving side in the driving force transmission system.
15 is an enlarged plan view showing only the configuration around the state detection mechanism, in particular, in the disc player of FIG.
[Explanation of symbols]
1 ... Selection mechanism
2 ... Switching control mechanism
3 ... Conveying roller drive mechanism
4 ... Pickup feed mechanism
5 ... Base plate
6 ... Clamper lock plate
6a ... axis
6b ... pin
7, 8 ... Floating lock plate
9 ... Disk drive motor
10 ... Power motor
11 ... Warm
12 ... Worm wheel
13 ... axis
14 ... idler plate
14a ... pin
15 ... idler gear for switching control
16 ... idler gear for driving the transport roller
17 ... idler gear for pick-up feeding
21 ... Switching control gear
22 ... Driving force conversion mechanism
23 ... Pinion
24 ... Rack plate
24a ... Guide groove
24b ... Spring
24c ... trigger engaging portion
25 ... shift plate
25a ... pin
25b ... 1st cam hole
25c ... second cam hole
25d ... Lock hole
26 ... Clamper member
26a ... axis
27 ... Link mechanism
27a-27d ... Position restriction part
28 ... Subshift plate
30 ... Conveying roller member
30a ... axis
30b ... pin
30c ... Conveying gear
31 ... Conveyance roller drive gear
32 ... Driving force conversion mechanism
33 ... Gear
34 ... Connecting gear
40 ... Optical pickup
40a ... Pickup lens
40b ... Pressing part
40c ... Screw holder
40d ... Spring part
41 ... Pickup feed gear
42 ... Driving force conversion mechanism
43 ... Lead screw
44 ... Slide guide
45 ... idler lock plate
46 ... Spring
50 ... Lead-in area
51, 52 ... Detection switch
60 ... Selection mechanism
61 ... Worm wheel
62 ... Drive gear
63 ... axis
64 ... idler plate
64a ... pin
65 ... idler gear
70: Disc attracting mechanism
71: Disc guide gear
72. First driving force conversion mechanism
73 ... pinion
74 ... Rack plate
75 ... shift plate
75a ... Lock hole
76: Second driving force conversion mechanism
77 ... Gear
81 ... Pickup feed gear
82 ... Driving force conversion mechanism
90 ... Control circuit

Claims (8)

A disk rotation mechanism for rotating the disk on the turntable, a disk calling mechanism for calling the disk to the turntable, a pickup feeding mechanism for moving an optical pickup for reading an optical disk signal in the radial direction of the disk, and the optical pickup In a disc player provided with an inner circumference position detecting means for detecting that the optical disc signal on the inner circumference side of the information recording area of the disc is at an inner circumference position where the optical disc signal can be read.
The optical pickup is provided so as to be movable to the innermost peripheral position where the optical disk signal inside the inner peripheral position cannot be read,
A selection mechanism for selectively transmitting a driving force from a single driving source to the disk calling mechanism and the pickup feeding mechanism;
The selection mechanism is configured to automatically switch the driving force transmission destination to either the pickup feeding mechanism or the disk loading mechanism in a state where the optical pickup is at the innermost circumferential position .
The disc player according to claim 1, wherein the inner peripheral position detecting means is configured to detect the completion of chucking of the disc on the turntable using the operation of the optical pickup. The inner circumference position detecting means includes
The disc chucking completion is detected when the optical pickup moves outside the inner peripheral position after the disc attracting operation by the disc attracting mechanism is completed. Disc player. The inner circumference position detecting means includes
The optical pickup is configured to be in a first state when the optical pickup is at the inner peripheral position, and to be switched to a second state when the optical pickup is moved outward from the inner peripheral position. Item 3. A disc player according to item 2. The inner circumference position detecting means includes
It is a detection switch that is pressed by the optical pickup when the optical pickup is at the inner peripheral position and is arranged to be separated from the optical pickup when the optical pickup moves outside the inner peripheral position. The disc player according to claim 3.   5. The disc player according to claim 2, further comprising a control circuit that controls the drive source in accordance with a signal from the inner circumference position detecting means. A method for controlling the drive source for the disc player according to any one of claims 2 to 5,
After the disc attracting operation by the disc attracting mechanism is completed, by rotating the drive source as it is and operating the pickup feeding mechanism, the optical pickup at the innermost peripheral position performs an outward detection operation,
When the completion of chucking of the disc is detected by the inner circumferential position detecting means during the detection outward operation of the optical pickup, the operation direction of the optical pickup is switched inward by inverting the drive source,
Let this optical pickup perform an inward movement for detection,
When the optical pickup is detected to be in the inner peripheral position by the inner peripheral position detection means during the detection inward operation of the optical pickup, the optical pickup is stopped by temporarily stopping the drive source,
Let this optical pickup read the management information recorded in the inner peripheral area of the disc,
After reading the disc management information by the optical pickup, the drive source is reversed again to switch the operation direction of the optical pickup to the outside again,
A method of controlling a drive source of a disc player, characterized by starting a disc playback operation.   When the insertion of a disk is detected by a disk detection means provided in the vicinity of the disk calling mechanism, the disk calling operation is performed by starting the drive source and operating the disk calling mechanism. 7. A method for controlling a drive source of a disc player according to claim 6. By rotating the drive source after playing the disc and operating the pickup feeding mechanism, the optical pickup is caused to perform an inward return operation,
By rotating the drive source as it is and operating the disk loading mechanism when the inner peripheral position detecting means detects that the optical pickup is at the inner peripheral position during the return operation of the optical pickup, Let the discharge operation,
When completion of ejection of the disk is detected by the disk detection means provided in the vicinity of the disk loading mechanism during the disk ejection operation of the disk loading mechanism, the drive source is stopped and the operation is terminated. 7. A drive source control method for a disc player according to claim 6.

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