JP2007310982A - Disk-loading device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk-loading device designed for space-saving. <P>SOLUTION: The disk-loading device includes a case 4; an optical pickup mechanism 11 recording/reproducing an information signal for a disk 3; a disk-chucking mechanism 13 for operating a chucking plate 62 rotatably holding the disk 3; a disk-conveying mechanism 12 for operating a conveyance part 70 that conveys the disk 3 along the inside/outside the case 4; one drive motor 90; and a drive part 41 having a drive member 91 driven by receiving the driving force of the drive motor 90 for driving the optical pickup mechanism 11, the disk-chucking mechanism 13, and the disk-conveying mechanism 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a disk loading apparatus that includes a frame serving as a fixed portion and a recording and / or reproducing portion disposed in the frame, and the recording and / or reproducing portion is floatingly supported with respect to the frame.

  A disc recording / reproducing apparatus for recording or reproducing an information signal to / from a disc generally includes a disc chucking unit that rotatably holds the disc, and an information signal for the disc that is held and rotated by the disc chucking unit. The optical pickup unit that records or reproduces data and the disk transport unit that transports the disk over the inside and outside of the housing, and the base substrate on which these are assembled is disposed in the housing.

  The disk chucking unit includes a disk table on which an optical disk is placed, a spindle motor that rotationally drives the disk table, and a disk pressing plate that rotatably holds the optical disk together with the disk table. The optical pickup unit includes a pickup base including an objective lens, a light source, a photodetector, and the like, a transport unit that transports the pickup base in the radial direction of the optical disc, and a stepping motor that is a drive source of the transport unit. Further, the disk transport unit includes, for example, a transport roller that is rotatably supported in the vicinity of the disk insertion / removal port of the housing, and a roller arm that supports the transport roller.

  In such a disk recording / reproducing apparatus, a disk pressing plate of a disk chucking unit is supported so as to be movable up and down with respect to a base substrate, and a roller arm supporting a conveying roller is supported so as to be movable up and down in a disk conveying area. The disk recording / reproducing apparatus is supported on a side surface of a base substrate, and is provided with a cam plate for moving the disk pressing plate and roller arm up and down, and a drive motor for sliding the cam plate.

  Then, by driving the drive motor forward or backward, the cam plate is slid back and forth to raise and lower the disk pressing plate and the roller arm, or to rotate the transport roller connected to the drive motor via the gear mechanism.

  However, such a disc recording / reproducing device has a base plate that is enlarged on the side surface of the base substrate because a cam plate for operating the disc pressing plate and the roller arm and a gear train for rotating the transport roller are formed. As a result, the entire casing is increased in size. In addition, a spindle motor that rotates the disk table, a stepping motor that transports the pickup base, and a drive motor that drives the disk pressing plate and transport roller are provided as motors on the base substrate. It was difficult to plan.

Japanese Patent No. 2841906

  SUMMARY OF THE INVENTION An object of the present invention is to provide a disk loading device that saves space by providing a drive unit that drives an optical pickup unit, a disk chucking unit, and a disk transport unit.

  In order to solve the above-described problems, a disk loading device according to the present invention includes a housing, an optical pickup mechanism that records and / or reproduces information signals on the disk, and a chuck that rotatably holds the disk. A disk chucking mechanism that operates a king plate, a disk transport mechanism that operates a transport unit that transports the disk over and out of the housing, a drive motor, and a drive motor that receives the drive force Thus, the optical pickup mechanism, the disk chucking mechanism, and the drive unit that drives the disk transport mechanism are provided.

  The disk loading apparatus according to the present invention includes a housing, an optical pickup mechanism for recording and / or reproducing information signals with respect to the disk, a disk chucking mechanism for rotatably holding the disk, and the housing. A disk transport mechanism for transporting the disk over and out of the disk, a drive motor, and an engagement / disengagement mechanism for the drive motor are formed, and the light is rotated by being driven by the driving force of the drive motor. A drive unit having a pickup mechanism, a disk chucking mechanism, and a cam gear that interlocks the disk transport mechanism, and the drive unit drives the disk transport mechanism when the disk is inserted to pull the disk into the housing. Thereafter, the cam gear is rotated by engaging the cam gear with the drive motor by the engagement / disengagement mechanism. , Disconnection of the drive motor of the disk transfer mechanism, and the chucking of the disk by the chucking mechanism, in which sequentially performs conveyance in the radial direction of the disc of the optical pickup mechanism.

  According to the disk loading apparatus of the present invention, the disk can be inserted and ejected, the optical pickup mechanism can be transported, and the chucking mechanism can be operated using a single drive motor provided in the drive section. Therefore, by arranging the minimum necessary drive motor, it is possible to save space in the housing and to reduce the size of the housing.

  Hereinafter, a disk loading apparatus to which the present invention is applied will be described in detail with reference to the drawings. The disk loading apparatus 1 is a recording / reproducing apparatus for an optical disk such as a compact disk or a digital versatile disk on which data such as music data, video data, and map data is recorded. The disk loading apparatus 1 is used as a core unit constituting an AV navigation connected to an in-vehicle car audio system or a monitor, for example, and as shown in FIG. 1, a 1DIN or 2DIN size apparatus main body 2 is provided. As shown in FIG. 2, the apparatus main body 2 includes a substantially rectangular casing 4 that is formed to have a size in which the optical disc 3 is substantially inscribed, a main body panel 5 that is attached to the front side of the casing 4, and a casing. 4 top covers 6.

  As shown in FIG. 2, the housing 4 includes a rectangular frame 10 that is formed to have a size in which the optical disk 3 is substantially inscribed, and recording and / or reproducing information signals with respect to the optical disk 3 inside the frame 10. , An optical pickup unit 11 for carrying out the optical disc 3, a disc transport mechanism 12 for transporting the optical disc 3 over and out of the housing 4, and a chucking unit 13 for chucking the optical disc 3 in a rotatable manner. The recording / reproducing unit 14 attached to is disposed. A top cover 6 is attached to the upper surface of the frame 10, and a main body panel 5 is attached to the front side where the disc is inserted and ejected.

  The frame 10 is formed in a rectangular box shape with the top opened, and the upper surface is closed by the top cover 6 after the recording / reproducing unit 14 is disposed in a floating state. Further, as shown in FIG. 3, the frame 10 has a recess 15 that is recessed in the middle of the front wall 10a on which the main body panel 5 is attached and the optical disk 2 is inserted and ejected, among the side walls that surround the four sides. The recess 15 is formed with a lock groove 16 for locking the recording / reproducing unit 14. The front wall 10a is provided with a gradually lower side wall height in the middle where the recess 15 is provided, and the top of the recess 15 is formed lower than both ends of the front wall 10a. The frame 10 has a conveyance area for the optical disc 2 above the recess 15, and when the optical disc 3 is mounted on the recording / reproducing unit 14 as shown in FIG. A part of the back side is located.

  The lock groove 16 formed in the concave portion 15 fixes the recording / reproducing unit 14 supported in the floating state in the frame 10 by inserting a lock piece 42 provided in the recording / reproducing unit 14 described later. Is for. The lock groove 16 is provided in the recess 15 that is recessed inward of the frame from the front wall 10a, so that when the lock piece 42 is locked, the engagement pieces 80 and 81 that constitute the lock piece 42 are connected to the front surface of the frame 10. It penetrates so that it may not protrude from the line which connects the both ends of wall 10a. A pair of locking pieces 17 and 17 are formed in the vicinity of the lock groove 16 so that one end of a coil spring 24 that urges a disk detection pin 22 to be described later is locked.

  As shown in FIG. 4, the frame 10 includes a damper 20 for supporting the recording / reproducing unit 14 in a floating state on the bottom surface 10 b, a printed wiring board 21 in which an operation circuit of the disk loading device 1 is formed, A disk detection pin 22 for detecting the optical disk 2 is provided, and a pair of guide grooves 25 for guiding the movement of the disk detection pin 22 are formed.

  The damper 20 is made of an elastic member such as rubber, and has an insertion port 20a into which an insertion pin protruding from the lower surface of the recording / reproducing unit 14 is inserted. Two dampers 20 are disposed near both ends of the front wall 10a of the bottom surface 10b and one in the middle of the rear wall 10c. The damper 20 supports the recording / reproducing unit 14 at three points, so that external vibration is recorded through the frame 10. The transmission to the reproduction unit 14 is mitigated. In addition, the number and arrangement | positioning of the damper 20 can be changed suitably.

  The printed wiring board 21 is a so-called rigid board, on which various wiring patterns that omit details are formed, and various electronic components such as semiconductor elements, connectors, and the like are mounted. A detection switch 23 for detecting insertion / ejection of the optical disk 3 is mounted on the printed wiring board 21. The detection switch 23 is mounted on the front wall 10a side of the frame 10 and detects the insertion / ejection state of the optical disc 3 by being pushed by the disc detection pin 22 that is slid according to the insertion / ejection of the optical disc 3. A switch portion pressed by the detection pin 22 faces a guide groove 25 formed on the bottom surface 10b. The detection switch 23 is provided on the right end portion side of the front wall 10a in the vicinity of the first detection switch 23a provided on the concave portion 15 side of the frame 10 in the vicinity of the pair of left and right guide grooves 25, respectively. A second detection switch 23b.

  The first detection switch 23a detects insertion of the optical disk 3, and is pressed by the disk detection pin 22 in the optical disk 3 insertion standby state. When the optical disk 3 is inserted by the user, the first detection switch 23a is shown in FIG. As described above, the pressed state is released by the disk detection pin 22. When the first detection switch 23a is released from the waiting state for inserting the optical disc 3, the disc loading device 1 detects that the optical disc 3 has been inserted, and drives the disc transport mechanism 12 to frame the optical disc 3 into the frame. Pull into 10.

  The second detection switch 23b detects ejection and reinsertion of the optical disc 3, and is not pressed by the disc detection pin 22 when the optical disc 3 is mounted on the recording / reproducing unit 14. When the optical disk 3 is ejected from this state, as shown in FIG. 7, the second detection switch 23b is pressed by the disk detection pin 22, and then the pressed state is released. The disk loading device 1 detects that the optical disk 3 has been transported to the ejection position when the second detection switch 23b is depressed in the ejection process of the optical disk 3 and the depressed state is released. Stop. Further, as shown in FIG. 8, the disc loading apparatus 1 confirms that the optical disc 3 has been reinserted when the second detection switch 23b is pressed again after the disc transport mechanism 12 is stopped, as shown in FIG. Then, the disk transport mechanism 12 is driven, and the optical disk 3 is drawn into the frame 10 again.

  A pair of disc detection pins 22 for operating this detection switch 23 are slidably arranged toward the left and right ends along the front wall 10a of the frame 10, and are pressed by the side surface of the optical disc 3 to be inserted or ejected. It is slid while being guided by the left and right guide grooves 25RL. As shown in FIG. 4, the disc detection pin 22 is placed on the transport area of the optical disc 3 so that the side surface of the optical disc 3 comes into contact with the support pin 22a. 22b, a guide piece 22c extending from the support portion 22b and inserted into a guide groove 25 formed in the bottom surface 10b of the frame 10, and one end of a coil spring 24 for urging the disc detection pin 22 are locked. Part 22d.

  The guide grooves 25 provided on the bottom surface 10b and through which the guide pieces 22c are inserted are respectively formed along the front wall 10a of the frame 10 from the substantially center where the recess 15 is formed toward both ends of the front wall 10a. Yes. The disk detection pin 22 is slid along the front wall 10 a as the guide piece 22 c is guided by the guide groove 25.

  Further, the contact pin 22a is erected from one end of the support portion 22b and is rotatably supported so that friction with the optical disc 3 can be reduced. The support portion 22b is slidably held on the bottom surface 10b by the support plate 26.

  The support plate 26 is overlapped on the support portion 22b and is screwed to the bottom surface 10b of the frame 10 via the printed wiring board 21, whereby the disc detection pin 22 is slidably held on the frame 10. The support plate 26 is provided with a support wall portion 26a for supporting the slide of the contact pin 22a on the side surface on the contact pin 22a side.

  Further, the coil spring 24 whose one end is locked to the locking portion 22d of the disk detection pin 22 is locked to the locking piece 17 formed in the vicinity of the lock groove 16 at the other end. Accordingly, the disk detection pin 22 is always urged to slide the contact pin 22 a toward the concave portion 15 by the urging force of the coil spring 24.

  The disc detection pin 22 is urged by the coil spring 24 and slid toward the concave portion 15 in the state of waiting for insertion of the optical disc 3, and the first detection switch 23a is pressed by the support portion 22b. When the abutting pin 22a with the tip portion facing the disc conveying area is brought into contact with the front side surface of the optical disc 3 inserted from the front wall 10a, the urging force of the coil spring 24 is detected. And is slid toward the both right ends along the guide groove 25. At this time, as shown in FIG. 6, the disk detection pin 22 detects the insertion of the optical disk 3 to release the first detection switch 23a provided on the concave portion 15 side, and the disk transport mechanism 12 pulls in. Starts.

  When the recording / reproducing operation of the optical disk 3 is completed and the process proceeds to the ejection process, the disk detection pin 22 is pressed against the front side surface in the ejection direction of the optical disk 3 and slides toward the left and right ends against the urging force of the coil spring 24. Is done. As shown in FIG. 7, the disk detection pin 22 detects that the optical disk 3 has been transported to the ejection position in order to release the pressed state after the second detection switch 23b provided on one end side is pressed. As a result, the ejection operation by the disc transport mechanism 12 stops. At this time, when the optical disk 3 is again pushed into the frame 10 by the user, the disk detection pin 22 presses the second detection switch 23b again as shown in FIG. 8, so that the optical disk 3 is reinserted. Detected and the drawing operation by the disk transport mechanism starts.

  In this manner, the disk loading device 1 monitors the pressed state of the detection switch 23 because the disk detection pin 22 is slid according to the insertion / ejection state of the optical disk 3 and the detection switch 23 is pressed accordingly. Thus, the insertion / ejection state of the optical disk 3 can be detected. The disc loading apparatus 1 can operate a disc transport mechanism 12 mounted on a recording / reproducing unit 14 described later according to the position of the optical disc 3.

  In addition, the disk loading device 1 has a disk detection pin 22 disposed on the bottom surface 10b of the frame 10 and a detection switch for detecting insertion / ejection of the optical disk 3 on the printed wiring board 21 disposed on the bottom surface 10b of the frame 10. No disc detection mechanism is provided on the side of the recording / reproducing unit 14 that is mounted and floatingly supported. Accordingly, since a connection cable or the like is not wired between the printed wiring board and the detection switch, there is no possibility that a problem such as a cable being pinched between the swinging recording / reproducing unit 14 occurs. . Since the detection switch 23 is mounted on the printed wiring board 21 on which the electric circuit is formed, insertion / ejection of the optical disk 3 can be reliably detected without fear of disconnection.

  The first detection switch 23a is mounted so as to be separated from the left and right in correspondence with each of the pair of left and right disk detection pins 22, and the pair of disk detection pins 22 is, for example, approximately 8 cm in the waiting state for insertion of the optical disk 3. They are spaced apart. Thus, when a small-diameter disk having a diameter of about 8 cm is inserted into the disk loading apparatus 1, both the left and right disk detection pins 22 are not slid at the same time, so that the pair of first detection switches 23a are Both are not released. Therefore, if the drive motor 90 is driven only when both of the first detection switches 23a are released from being pressed, the optical disk is pulled in only when a large-diameter disk having a diameter of approximately 12 cm is inserted, and the small-diameter It is possible to prevent the disk from being drawn into the housing 4 by mistake.

  Of the pair of disc detection pins 22, the right disc detection pin 22R guided by the right guide groove 25R is supported by a lock arm portion 27 that prevents double insertion of the optical disc 3 as shown in FIG. It extends from the part 22b. After the optical disk 3 is inserted into the housing 4, the lock arm portion 27 is locked to the lock plate 28 provided in the recess 15 of the front wall 10 a of the frame 10, so that the disk detection pin 22 </ b> R slides. The restriction prevents the optical disk 3 from being retreated from the disk transport area, thereby preventing the optical disk 3 from being further inserted into the housing 4.

  As shown in FIGS. 2 and 3, the lock plate 28 that locks the lock arm portion 27 is formed in a substantially cylindrical shape, and a pair of lock claws 28 a and 28 b are formed on the outer peripheral portion. The lock claw 28 a is provided on the outer peripheral portion of the lock plate 28 so as to protrude in a substantially opposite direction. The lock plate 28 is rotatably attached to the recess 15 of the front wall 10a, one lock claw 28a is positioned on the right side of the lock groove 16, and the other lock claw 28b is the lock arm portion of the right disc detection pin 22R. It is located on 27 slide areas. The lock plate 28 is always urged to rotate in the direction of arrow L in FIG. 3 where one lock claw 28a is inserted into the lock groove 16 by a coil spring (not shown).

  Since the lock plate 28 is provided in the recess 15, the lock plate 28 is attached without protruding from the outer shape of the frame connecting both ends of the front wall 10 a, and does not hinder downsizing of the frame 10.

  When the engagement piece 81 of the lock piece 42 is engaged with the lock groove 16, the lock plate 28 is pushed by the engagement piece 81 and rotated in the direction opposite to the arrow L in FIG. 3. As a result, the other lock claw 28 b is also retracted from the slide area of the lock arm portion 27. Therefore, when the recording / reproducing unit 14 is fixed to the frame 10 by the lock piece 42 and the optical disk 3 is inserted and ejected, the lock claw 28b is retracted from the slide area of the lock arm unit 27, and therefore the disk detection pin 22R. The slides are not disturbed.

  When the optical disk 3 is inserted into the housing 4 and the engagement piece 81 of the lock piece 42 is retracted from the lock groove 16, the lock plate 28 is rotated in the direction of arrow L in FIG. The lock claw 28 a is inserted into the lock groove 16, and the other lock claw 28 b is positioned on the slide area of the lock arm portion 27. When the optical disk 3 is further inserted in this state, the other lock claw 28 b is pressed in the direction of arrow L by the lock arm portion 27. At this time, since one lock claw 28a is inserted into the lock groove 16 and the rotation in the arrow L direction is restricted, the lock plate 28 cannot rotate in the same direction. Therefore, since the lock arm portion 27 is engaged with the lock claw 28b and the slide of the disc detection pin 22R is restricted, the double insertion of the optical disc 3 can be prevented.

  The main body panel 5 attached to the front side of the housing 4 has various operation buttons 30 of the apparatus main body 2, a display unit 31 for displaying disk information during recording and reproduction, and a disk insertion / removal port 32 through which the optical disk 3 is inserted / removed. Etc. are provided. As described above, the disk insertion / extraction opening 32 is formed on the upper portion of the main body panel 5 in accordance with the above-described area of the recess 15 provided in the front wall 10a of the frame 10 that is the conveyance area of the optical disk 3. Yes.

  The recording / reproducing unit 14 disposed in the frame 10 includes a base substrate 40 having a substantially rectangular plate shape, and an optical pickup unit 11 for recording and / or reproducing information signals with respect to the optical disc 3 on the base substrate 40. , A disk transport mechanism 12 for transporting the optical disk 3 in and out of the housing 4, a chucking section 13 for chucking the optical disk 3 in a rotatable manner, and the optical pickup section 11, the disk transport mechanism 12 and the chucking section 13. The drive part 41 which drives is formed.

  As shown in FIGS. 9 and 10, the base substrate 40 has a deck portion 40b formed on the front side of the main surface portion 40a on which the optical pickup portion 11 and the chucking portion 13 are disposed via a step portion. . The deck portion 40 b is provided with a lock piece 42 that is engaged with the disk transport mechanism 12 and the lock groove 16 formed in the recess 15 of the frame 10.

  The base substrate 40 is arranged in the frame 10 so that the inside of the frame 10 is divided into upper and lower parts, the upper part is used as a disk conveyance area, the lower part is provided with an arrangement area for the optical pickup unit 11 and the drive unit 41, and a print. It is a connection area with the wiring board 21 and the like.

  The optical pickup unit 11 has a pickup base 45. In the pickup base 45, a light emitting element that emits laser light, and a signal recording surface of the optical disk 3 are irradiated with laser light emitted from the light emitting element and the optical disk 3 is irradiated. An optical block including an objective lens 46 that collects the reflected light from the light and a photodetector that detects the collected reflected light is incorporated.

  The optical pickup 7 also drives an objective lens such as a biaxial actuator that drives the objective lens 46 to be displaced in an optical axis direction (referred to as a focusing direction) and a direction orthogonal to a recording track of the optical disc 3 (referred to as a tracking direction). Based on the detection signal from the optical disk 3 detected by the above-described photodetector, the biaxial actuator displaces the objective lens 46 in the focusing direction and the tracking direction, and the signal recording surface of the optical disk 3 has a mechanism. Further, drive control is performed such as a focus servo for focusing the objective lens 46 and a tracking servo for causing the spot of the light beam condensed by the objective lens 46 to follow the recording track. As the objective lens driving mechanism, in addition to such focusing control and tracking control, the signal of the optical disc 3 is irradiated so that the light beam condensed by the objective lens 46 is irradiated perpendicularly to the signal recording surface of the optical disc 3. A triaxial actuator that can adjust the inclination (skew) of the objective lens 46 with respect to the recording surface may be used.

  The pickup base 45 is exposed to the disc transport area from the pickup opening 47 provided in the base substrate 40 over the radial direction of the optical disc 3 on which the objective lens 46 is mounted on the chucking portion 13. The pickup base 45 collects and irradiates the light beam emitted from the light emitting element onto the optical disk 3 rotated by the chucking unit 13 with the objective lens 46, and returns the light beam reflected by the optical disk 3. Is detected by a photodetector, data is written to the optical disc 3 while control of tracking servo, focusing servo, etc. is performed, and data recorded on the optical disc 3 is read.

  As shown in FIG. 11, the pickup base 45 is engaged with an engagement plate portion 48a of an engagement piece 48 formed in the pickup opening 47 of the base substrate 40 on one end 45a side in the longitudinal direction. An engagement recess 49 is formed as a support portion for supporting the base 45 on the engagement piece 48. The engagement concave portion 49 is formed in a substantially U-shaped cross section, and the engagement piece 48 is inserted and engaged from an open end formed toward the tip of the engagement plate portion 48a.

  The pickup base 45 is supported to support the pickup base 45 on the guide shaft 50 by inserting the guide shaft 50 disposed in the pickup opening 47 of the base substrate 40 on the other end 45b side in the longitudinal direction. An insertion hole 51 to be a part is formed.

  Further, the pickup base 45 is provided with a rack 52 for moving the pickup base 45 in the radial direction of the optical disc 3 on the other end 45b side. The pick-up base 45 is moved in the radial direction of the optical disc 3 that is rotatably supported by the chucking portion 13 in the pick-up opening 47 along the guide shaft 50 by the rack 52 being sent by a driving portion 41 described later. To be operated.

  A chucking unit 13 that rotatably chucks the optical disk 3 transported into the housing 4 by the disk transport mechanism 12 includes a disk table 60 on which the optical disk 3 is mounted, a spindle motor 61 that rotates the disk table 60, A chucking arm 63 having a disk pressing plate 62 that sandwiches the optical disk 3 with the disk table 60 and chucks it rotatably.

  In the disk table 60, the spindle of the spindle motor 61 is fixed at the center, and the spindle motor 61 is driven to drive the optical disk 3, for example, CLV (Constant Linear Velocity), CAV (Constant Angula Velocity), ZCLV (Zone Constant Linear Velocity). , Rotating while performing servo control such as ZCAV (Zone Constant Angular Velocity).

  As shown in FIGS. 2 and 10, the disc pressing plate 62 that sandwiches the optical disc 3 together with the disc table 60 is made of a resin disk and is attached to a chucking arm 63 that is rotatably attached to the base substrate 40. Thus, the optical disc 3 can be separated from and attached to the disc table 60 on which the optical disc 3 is placed.

  The chucking arm 63 is made of a substantially rectangular sheet metal having a substantially central portion bulged in the width direction, and a disk holding plate 62 is attached to the bulging end corresponding to the disk table 60 attached to the base substrate 40. ing. In addition, the chucking arm 63 is inserted and supported by a pair of support pieces 65 and 65 projecting from the rear side corner portion of the base substrate 40 through rotation shafts 66 and 66 projecting from both ends in the longitudinal direction. Thus, the rotation on the base substrate 40 can be performed with the rotation shafts 66 and 66 as fulcrums. The chucking arm 63 is always urged toward the base substrate 40 by the other end of the spring member 67 having one end locked to the base substrate 40, and the disc pressing plate 62, the disc table 60, Is rotated so as to abut. Further, the chucking arm 63 has a cam piece 68 protruding from one end side in the longitudinal direction. The cam piece 68 is curved toward the base substrate 40 side, and a sliding portion 68a is formed which slides on the chucking cam 170 of the chucking arm control lever 97 interlocked with the driving portion 41 described later. The chucking arm 63 is moved close to and away from the base substrate 40 by the portion 68a being guided by the chucking cam 170.

  Specifically, the chucking arm 63 opposes the urging force of the spring member 67 with the pivot shafts 66 and 66 as fulcrums as the sliding portion 68a rides on the chucking cam 170 of the chucking arm control lever 97. As a result, the disc holding plate 62 and the disc table 60 are separated from each other. The chucking arm 63 is rotated in the direction close to the base substrate 40 by the urging force of the spring member 67 when the chucking cam 170 is retracted from the lower portion of the sliding portion 68a. 60, the optical disk 3 is rotatably held.

  In the state where the chucking portion 13 is waiting for the optical disk 3 to be inserted, the cam piece 68 is guided by the chucking cam 170 of the chucking arm control lever 97 and the chucking portion 13 counteracts the biasing force of the spring member 67. The king arm 63 is raised in a direction away from the base substrate 40 (FIG. 22). As a result, the chucking unit 13 can transport the optical disc 3 onto the disc table 60.

  When the optical disk 3 is transported into the frame 10 by the disk disk transport mechanism 12, the chucking unit 13 causes the chucking cam 170 to move the cam piece 68 by the chucking arm control lever 97 that receives the driving force of the drive unit 41. The chucking arm 63 is retracted from the lower portion of the sliding portion 68a and is brought closer to the base substrate 40 side. As a result, the chucking unit 13 holds the optical disc 3 between the disc table 60 and the disc pressing plate 62 and chucks the optical disc 3 so as to be rotatable while centering the optical disc 3 (FIG. 29). The disk pressing plate 62 is rotated together with the optical disk 3 when the disk table 60 is rotationally driven by the spindle motor 61.

  Further, in the ejecting process of the optical disc 3, the cam piece 68 is guided by the chucking arm control lever 97 that receives the driving force of the drive unit 41, and the chucking cam 170 enters the lower portion of the sliding portion 68a. 63 is separated from the base substrate 40. As a result, the disc pressing plate 62 and the disc table 60 release the chucking of the optical disc 3 so that it can be transported out of the housing 4.

  The disc transport mechanism 12 that transports the optical disc 3 over the inside and outside of the housing 4 has a transport roller 70 that transports the optical disc 3 over the inside and outside of the frame 10 and a roller arm 72 that rotatably supports the transport roller 70. The optical disk 3 is directly inserted into and removed from the disk insertion / removal port 32 of the main body panel 5 formed on the front side of the frame 10. The transport roller 70 is supported by a deck arm 40b provided on the front side of the base substrate 40 by a roller arm 72 so as to be rotatable in the in-plane direction of the optical disc 3 in a direction perpendicular to the insertion / removal direction of the optical disc 3. The optical disk 3 is transported in and out of the apparatus main body 2 by being driven forward or reversely by the drive unit 41.

  The conveying roller 70 has an elastic member wound around an outer peripheral portion in contact with the signal recording surface of the optical disc 3, and a gear train 71 to which the driving force of the driving unit 41 is transmitted is provided at one end in the longitudinal direction. . The transport roller 70 is exposed to the disk transport area when the roller arm 72 is rotated on the deck section 40b, and the driving force of the drive section 41 is transmitted through the gear train 71, so that The optical disc 3 is transported in the insertion direction or the ejection direction according to the rotation direction.

  The roller arms 72 that support both ends of the conveying roller 70 are formed in a substantially rectangular shape, and a pair of spring locking portions 73 and a pair of insertion preventing pieces 74 that prevent double insertion are bent on both sides in the longitudinal direction. Is formed. Further, the roller arm 72 is provided with a support hole 77 that is inserted and supported by a pair of support protrusions 76 that are erected on the deck 40b.

  The roller arm 72 is rotatably supported on the deck portion 40 b by inserting the support hole portion 77 into the support protrusion 76, and is provided at the step portion of the base substrate 40 on the spring locking portion 73. The other end of the coil spring 78 whose one end is locked to the locking protrusion 75 is locked. As a result, the roller arm 72 is always urged to rotate in the direction of arrow A in FIGS. 9 and 22 by the urging force of the coil spring 78 with the support hole 77 as a fulcrum, so that the conveying roller 70 faces the disk conveying area. The insertion preventing piece 74 is retracted from the disk conveyance area.

  The roller arm 72 is provided with a lifting cam 79 on the back surface. The lift cam 79 is pressed by a convex portion 88 formed on an operation plate 82 for operating the lock piece 42 described later, thereby rotating the roller arm 72 in the counter arrow A direction against the urging force of the coil spring 78. Thus, the conveyance roller 70 is retracted from the conveyance area of the optical disk 3 and the insertion preventing piece 74 is allowed to face the conveyance area of the optical disk 3. Further, the raising / lowering cam 79 allows the roller arm 72 to be rotated again in the direction of arrow A by the biasing force of the coil spring 78 by separating the convex portion 88 of the operation plate 82.

  Next, the lock piece 42 provided on the deck portion 40b and engaged with the lock groove 16 formed on the front wall 10a of the frame 10 described above will be described. The lock piece 42 engages with the lock groove 16 of the frame 10 which is a fixing portion when the optical disk 3 is inserted and ejected, thereby fixing the base substrate 40 supported in a floating state, and stable insertion and ejection of the optical disk 3. It is intended.

  As shown in FIG. 9, the lock piece 42 includes a pair of engagement pieces 80 and 81 engaged with the lock groove 16, and an operation plate 82 that rotates the engagement pieces 80 and 81. The engaging pieces 80 and 81 have main surface portions 80a and 81a that are rotatably supported by the deck portion 40b, and engaging portions 80b and 81b that extend from the main surface portions 80a and 81a. The main surface portions 80a and 81a are rotatably supported by the deck portion 40b, and an engaging groove 83 is formed in which a rotating convex portion 84 protruding from the operation plate 82 is engaged. The lock piece 42 moves in the engagement groove 83 in accordance with the movement of the operation plate 82, and the engagement portions 80 b and 81 b are engaged with and disengaged from the lock groove 16 by moving the rotation projection 84. The engaging portions 80b and 81b are rotated in the direction of the opposite arrow B away from the lock groove 16.

  The engaging portions 80b and 81b extending from the main surface portions 80a and 81a are provided with contact pieces 85 that contact the concave portions 15 provided on the front wall 10a of the frame 10 on the back surface side. The contact piece 85 is supported in a floating state by contacting the recess 15 of the front wall 10a as shown in FIG. 5B when the engaging portions 80b and 81b are engaged with the lock groove 16. The base substrate 40 is pressed against the front wall 10a to position the base substrate 40 in the insertion / removal direction of the optical disc 3 and to prevent rattling.

  The operation plate 82 for rotating the engaging pieces 80 and 81 is formed in a substantially rectangular plate shape, and the longitudinal direction is set to a direction substantially perpendicular to the insertion / removal direction of the optical disc 3 and is slidably supported on the deck portion 40b. Has been. The operation plate 82 is formed with a pair of guide holes 86 that are spaced apart in the longitudinal direction. The guide hole 86 is a long hole along the longitudinal direction, and a support pin 87 for supporting the lock piece 42 is inserted on the deck portion 40b. The operation plate 82 is supported on the deck portion 40 b when the guide hole 86 is inserted into the support pin 87, and the deck portion 40 b is moved along the guide hole 86 when the support pin 87 moves through the guide hole 86. The top can be slid.

  The operation plate 82 is provided with a convex portion 88 corresponding to the lifting cam 79 provided on the roller arm 72 of the conveying roller 70. The convex portion 88 is made of a resin molded product, is inserted through a locking hole formed in the operation plate 82, and faces the front and back sides of the operation plate 82. The convex portion 88 is a portion that faces the front surface side of the operation plate 82 is a lifting portion 88 a that presses the lifting cam 79 of the roller arm 72 to raise and lower the conveying roller 70, and the portion that faces the back surface side is a metal. The sliding portion 88b slides on the deck portion 40b made of a plate.

  Further, the operation plate 82 has a side edge portion on the main surface portion 40a side of the base substrate 40 extending to the main surface portion 40a side, and is provided with a connecting piece 89 that is connected to a roller arm control lever 93 of the drive unit 41 described later. Yes. The connecting piece 89 is provided with an elongated connecting hole 89 a and an engaging projection 179 projecting from the roller arm control lever 93 is inserted and engaged therewith. The operation plate 82 is slid in the direction of the arrow H in FIG. 9 which is the longitudinal direction by the roller arm control lever 93 that receives the driving force of the drive unit 41, so that the lock piece 42 is engaged when the optical disk 3 is inserted or removed. The pieces 80 and 81 are rotated in the direction of arrow B in the figure. As a result, the engaging portions 80 b and 81 b of the engaging pieces 80 and 81 engage with the lock groove 16, and the base substrate 40 supported in a floating state on the frame 10 is fixed.

  Here, the lock piece 42 is provided in the deck portion 40b that is one step lower than the main surface portion 40a of the base substrate 40 via a stepped portion, and as described above, the lock groove 16 is a recess in the front wall 10a of the frame 10. 15 and the recess 15 is formed lower than both ends of the front wall 10a. That is, the lock groove 16 provided in the recess 15 and the lock piece 42 engaged with the lock groove 16 are provided below the transport area of the optical disc 3 and are chucked by the chucking portion 13. It is provided at a position overlapping with the outer periphery of the optical disc 3. The lock piece 42 rotated in the direction of the arrow B does not protrude from a line connecting both end portions of the front wall 10a of the frame 10 in a state where the engagement pieces 80 and 81 are engaged with the lock groove 16. . Accordingly, when the base substrate 40 supported in a floating state is fixed to the frame 10, the disk loading apparatus 1 is attached to the front wall 10a side because the lock piece 42 does not protrude from the front wall 10a of the frame 10. No extra space is required between the main body panel 5 and the main body panel 5, so that the apparatus main body 2 can be downsized, and a long space is not required in the insertion / removal direction of the optical disk 3 when assembled to the drive bay or the audio control panel. Can be installed.

  When the insertion / removal operation of the optical disk 3 is completed, the operation plate 82 is slid in the direction of the opposite arrow H in FIG. 9 by the roller arm control lever 93 that receives the driving force of the driving unit 41, whereby each of the lock pieces 42. The engaging pieces 80 and 81 are rotated in the direction of the opposite arrow B. As a result, the engagement between the engagement portions 80b and 81b of the engagement pieces 80 and 81 and the lock groove 16 is released, the base substrate 40 and the frame 10 are separated, and the recording / reproducing portion 14 is brought into a floating state.

  Further, as described above, the housing 4 of the present disk loading apparatus 1 is provided with the recess 15 at the approximate center of the front wall 10 a of the frame 10, and the recess 15 is formed as a disk transport area of the optical disk 3. The position of the disk insertion / removal port 32 of the main body panel 5 attached to the frame 10 is also formed on the upper side according to the disk conveyance area of the frame 10. Therefore, as shown in FIG. 2, the disc loading apparatus 1 can widely provide the display unit 31 of the main body panel 5 and can improve the visibility.

  Next, the lock piece 42 and the drive unit 41 that drives the optical pickup unit 11, the disk transport mechanism 12, and the chucking unit 13 described above will be described. The disk loading apparatus 1 moves the optical pickup unit 11, inserts and ejects the optical disk 3, lifts and lowers the chucking arm 63, and locks, in addition to rotationally driving the disk table 60 on which the optical disk 3 is placed by the spindle motor 61. All the rotations of 42 are performed using the drive motor 90 of the drive unit 41.

  As shown in FIGS. 12 and 13, the drive unit 41 includes a drive motor 90 serving as a power source, a cam gear 91 that is rotated by the drive force of the drive motor 90, the cam gear 91, and the optical pickup unit 11. A rack gear 92 that meshes with the attached rack 52 and moves the pickup base 45 in the radial direction of the optical disk 3, a roller arm control lever 93 that slides the operation plate 82 to drive the lock piece 42, and the driving force of the drive motor 90. A switching lever 94 that switches the transmission to the disk transport mechanism 12, a gear train 95 that transmits the driving force of the drive motor 90 to the cam gear 91, and a trigger lever 96 that engages the cam gear 91 with the gear train 95 according to the transport of the optical disk 3. And a chucking arm control lever 97 for raising and lowering the chucking arm 63. It is attached to the rear surface side opposite to the disk transfer area of the base substrate 40. In FIG. 13, the cam gear 91 and the trigger lever 96 are omitted from the drive unit 41 shown in FIG.

  The drive motor 90 has a worm on the drive shaft and is connected to the gear train 95. The gear train 95 includes a first gear 101 connected to the drive motor 90 and a second gear 102 connecting the first gear and the cam gear 91. The first gear 101 is supported on the base substrate 40 coaxially with a switching lever 94 described later. The first gear 101 is a two-stage gear, and includes a large-diameter gear 101 a that meshes with the drive shaft of the drive motor 90, and a small-diameter gear 101 b that meshes with the swing gear 183 of the switching lever 94. The second gear 102 connected to the first gear 101 is a two-stage gear, and includes a large-diameter gear 102 a that meshes with the first gear 101 and a small-diameter gear 102 b that meshes with the cam gear 91.

  The cam gear 91 that receives the driving force of the driving motor 90 via the gear train 95 drives the rack gear 92, the roller arm control lever 93, the switching lever 94, and the chucking arm control lever 97, thereby driving the driving force of the driving motor 90. The optical pickup unit 11, the disc disk transport mechanism 12, the chucking unit 13, and the lock piece 42 are operated by the above.

  As shown in FIGS. 14 and 15, the cam gear 91 includes a large-diameter main cam 110 and a trigger cam 111 that drives the main cam 110 according to the conveyance of the optical disc 3. The main cam 110 is formed with a storage recess 112 in the main surface 110a for rotatably storing the trigger cam 111. The storage recess 112 is a substantially circular recess having substantially the same diameter as the trigger cam 111, and a cylindrical insertion hole 114 inserted and supported by a support shaft 113 protruding from the back surface of the base substrate 40 is provided at the approximate center. Projected. The storage recess 112 is provided with a locking projection 115 that is inserted through the opening 144 of the trigger cam 111.

  As shown in FIG. 16A, the main cam 110 has a gear portion 117 that engages with a rack gear 92 and a small-diameter gear 102 b of the second gear 102 on the outer peripheral wall 116 that forms the outer wall of the housing recess 112. Is formed. As shown in FIG. 16B, the gear portion 117 is engaged at the upper step portion in a direction orthogonal to the circumferential direction of the rack gear 92 and the outer peripheral wall 116, and is engaged at the lower step portion in the same direction as the small-diameter gear 102b. The FIG. 16B is a cross-sectional view taken along the line A-A ′ of the cam gear 91, the rack gear 92, and the second gear 102 shown in FIG.

  The gear portion 117 is formed so as to be able to be engaged with and disengaged from the rack gear 92 and the small-diameter gear 102b according to the rotational position of the cam gear 91. That is, the gear portion 117 has teeth formed on the upper step portion in the direction orthogonal to the circumferential direction of the outer peripheral wall 116 and the pickup conveying portion 118 that conveys the pickup base 45 via the rack gear 92, and the tooth portion on the lower step portion in the same direction. And a cam drive unit 119 that engages with the second gear 102 and rotates the main cam 110, a pickup restricting unit 120 that does not form teeth on the upper step in the same direction and does not operate the rack gear 92, and the same direction No teeth are formed in the lower step portion, and an engagement release portion 121 that is disengaged from the small-diameter gear 102b when the optical disc 3 is inserted and ejected is formed.

  The pickup transport unit 118 is engaged with the rack gear 92 by rotating the cam gear 91 when a gear is formed on the outer peripheral wall 116 of the main cam 110 at a height at which the rack gear 92 is supported. The pickup base 45 is conveyed over the inner and outer circumferences of the optical disc 3 according to the rotation direction.

  The cam drive portion 119 is formed with a gear over substantially the entire circumference except for a part of the disengagement portion 121 at the lower step portion of the outer peripheral wall 116 of the main cam 110 at a height at which the small-diameter gear 102b is supported. Further, the pickup restricting portion 120 is provided in a region partially overlapping with the cam driving portion 119, and is missing at an upper portion that is a height at which the rack gear 92 is supported. Accordingly, in a state where the rack gear 92 is opposed to the pickup restricting portion 120, the rack gear 92 is not rotated and the pickup base 45 is not conveyed. The main cam 110 rotates in a state in which the movement of the hip-up base 45 is regulated by the pickup regulating unit 120 facing the rack gear 92 in a state where the cam driving unit 119 is engaged with the small-diameter gear 102b. . At this time, the main cam 110 drives the roller arm control lever 93 and the chucking arm control lever 97 to fix or float the base substrate 40 with respect to the frame 10 and to chuck or unchuck the optical disk 3. After the base substrate 40 is in a floating state and the optical disk 3 is chucked, when the cam drive unit 119 is further rotated to the small diameter gear 102b, the rack gear 92 is engaged with the pickup transport unit 118 from the pickup restriction unit 120. The pickup base 45 is conveyed in accordance with the rotation of the small diameter gear 102b.

  The disengagement unit 121 prevents the optical pickup unit 11 and the chucking unit 13 from being driven via the cam gear 91 when the optical disc 3 is inserted into or ejected from the apparatus main body 2. Teeth are formed only on the upper step portion of the outer peripheral wall 116, and no teeth are formed on the lower step portion, which is the rotation region of the small-diameter gear 102b. Therefore, when the main cam 110 is rotated to a position where the disengagement portion 121 is opposed to the small diameter gear 102b, the main cam 110 is not engaged with the small diameter gear 102b until it is operated by the trigger cam 111, and the driving force of the drive motor 90 is transmitted. Not. At this time, in the drive unit 41, the driving force of the drive motor 90 is transmitted to the disc transport mechanism 12 side by the switching lever 94, and the optical disc 3 is inserted and ejected.

  As shown in FIGS. 14, 15, 17, and 18, the disengaging portion 121 is not formed with the outer peripheral wall 116 of the main cam 110, and the switch gear 140 of the trigger cam 111 described later is rotatable. It is arranged. Further, the disengagement part 121 is formed in a stepped shape toward one end side, and a tooth is formed on the lower step part that is a rotation region of the small-diameter gear 102b, thereby relaying to the cam drive part 119 via the switch gear 140. A gear portion 121a is provided. The main cam 110 is rotated by the switch gear 140 moving through the disengagement portion 121, so that the engagement with the small-diameter gear 102b is passed to the cam drive portion 119 via the switch gear 140 and the relay gear portion 121a. It is said. The engagement / disengagement operation between the main cam 110 and the second gear 102 via the switch gear 140 and the relay gear portion 121a will be described in detail later.

  Further, as shown in FIG. 19, the main cam 110 has a first rotation and a second rotation that rotate the roller arm control lever 93, the switching lever 94, and the chucking arm control lever 97 on the back surface 110 b according to the rotation of the main cam 110. Movement grooves 122 and 123 are formed. The first turning groove 122 is formed on the back surface 110b of the main cam 110 so as to be curved along the outer peripheral side, and the turning convex portion 184 formed on the switching lever 94 is engaged therewith. The second rotation groove 123 is formed on the back surface 110 b of the main cam 110 so as to be curved along the inner side of the first rotation groove 122, and the guide convex portion 169 formed on the chucking arm control lever 97. Are engaged.

  Further, as shown in FIG. 16B, the main cam 110 is biased by a rotation spring 130 disposed on the base substrate 40 on the back surface 110 b and is engaged with a rotation restricting portion 131 formed on the base substrate 40. A rotation convex portion 125 to be stopped is projected. Here, the rotation spring 130 that biases the rotation convex portion 125 is a linear spring, and is wound around a spring winding portion 132 protruding from the back surface of the base substrate 40, as shown in FIG. One end 130 a is locked to a spring locking portion 133 protruding from the back surface of the base substrate 40, and the other end 130 b is locked to a proximal end portion of a support shaft 113 protruding from the back surface of the base substrate 40. . Further, the rotary spring 130 is formed with a bent portion 130c that is bent in a substantially square shape on the other end 130b side, and the tip on the other end 130b side is close to the side opposite to the rotation restricting portion 131 of the support shaft 113. It is extended.

  The rotation restricting portion 131 is extended in a substantially L shape from the base end portion of the support shaft 113, and the rotation convex portion 125 is brought into contact with the rotation restricting portion 131. The rotation stop position of the cam gear 91 that is rotationally biased by 130 is defined.

  When the main cam 110 is inserted through the support shaft 113, the rotary projection 125 comes into contact with the other end 130b of the rotary spring 130 and slides while pressing the rotary spring 130 as it is rotated by the small-diameter gear 102b. To go. The main cam 110 is urged in the direction of arrow J in FIG. 13 when the rotating convex portion 125 is moved from the bent portion 130c to the one end 130a side, and the rotating convex portion 125 is moved from the bent portion 130c to the other end 130b side. Then, it is urged in the direction of arrow K in FIG.

  The main cam 110 is rotated in the direction of arrow J in FIG. 13 in the ejecting process of the optical disc 3, and the rotating convex portion 125 is also rotated in the same direction and slides while pressing the rotating spring 130. When the rotation convex portion 125 moves to the one end 130 a side beyond the bending portion 130 c, the rotation convex portion 125 is urged in the direction of arrow J in the figure by the inclined surface of the bending portion 130 c and abuts against the rotation restricting portion 131. Accordingly, the main cam 110 is restricted from rotating in the same direction in a state where the urging force in the direction of the arrow J by the rotation spring 130 is exerted by the rotation convex portion 125 coming into contact with the rotation restricting portion 131, and a predetermined rotational position. Are held in a position-restricted state. At this time, in the main cam 110, the small diameter gear 102b and the disengagement part 121 are opposed to each other.

  Next, the trigger cam 111 housed in the housing recess 112 of the main cam 110 will be described. In the trigger cam 111, the disengagement part 121 of the main cam 110 and the small-diameter gear 102b are opposed to each other, the engagement between the small-diameter gear 102b and the main cam 110 is released, and the rotation of the cam gear 91 is restricted. The main cam 110 and the small-diameter gear 102b are engaged by rotating so as to relay the small-diameter gear 102b and the cam drive unit 119 in accordance with the insertion of the cam.

  The trigger cam 111 is formed in a disk shape having a slightly smaller diameter than the storage recess 112 formed in a substantially circular shape, and a switch gear 140 disposed on the disengagement portion 121 of the main cam 110 is formed on a part of the outer periphery. Yes. The trigger cam 111 has a main groove 111a facing outward from the housing recess 112, a guide groove 141 for guiding the trigger lever 96, a recess 142 provided on the inner side of the guide groove 141, and a recess 142. A cylindrical engagement hole 143 that protrudes and is engaged with the insertion hole 114 of the main cam 110 and an opening 144 through which the locking protrusion 115 that is formed in the recess 142 and protrudes from the storage recess 112 is inserted. And are formed.

  When the trigger cam 111 is housed in the housing recess 112 of the main cam 110, the insertion hole 114 is inserted into and engaged with the engagement hole 143, and the locking protrusion 115 is inserted into the opening 144 above the recess 142. Protruding. Further, when the trigger cam 111 is housed in the housing recess 112 of the main cam 110, the switch gear 140 is rotatably disposed on the engagement release portion 121.

  The switch gear 140 has a plurality of teeth formed on an arcuate outer peripheral wall. Specifically, the switch gear 140 is disposed in the disengagement portion 121 so as to be substantially continuous with the cam drive portion 119 of the outer peripheral wall 116 of the main cam 110 and to be engaged with the small diameter gear 102b. Corresponding to the disengagement part 121 and has an occlusal gear part 146 that is formed in a stepped shape toward one end and meshes with the relay gear part 121a. The occlusal gear portion 146 is formed at a lower step than the engagement gear portion 145, and can be engaged with the small diameter gear 102a together with the relay gear portion 121a.

  Such a switch gear 140 is formed in a circumferential direction shorter than the engagement release portion 121, and is formed at both ends of the engagement release portion 121 by the trigger cam 111 being rotatably accommodated in the accommodation recess 112 of the main cam 110. The space between the outer peripheral walls 116 can be freely rotated.

  The guide groove 141 formed on the main surface 111a of the trigger cam 111 is for the rotation convex portion 157 of the trigger lever 96 to move, and is formed in an arc shape along the outer peripheral side of the trigger cam 111. A locking wall 141a is provided so as to partially block the course. The guide groove 141 is engaged with the trigger lever 96, and the trigger lever 96 that is rotated as the optical disc 3 is inserted presses the locking wall 141a. It is rotated in the direction of arrow C in FIG. The guide groove 141 has a substantially V-shaped retracting portion in which the rotating convex portion 157 of the trigger lever 96 is retracted when the optical disk 3 is inserted and waited by the locking wall 141a extending to the inside of the main surface 111a. 147 is formed.

  The engagement hole 143 projecting from the recess 142 formed inside the guide groove 141 is formed in a substantially cylindrical shape, and the insertion hole 114 projecting from the housing recess 112 of the main cam 110 is inserted. The main cam 110 is rotatably engaged. Further, the engagement hole 143 allows the cam gear 91 to be rotatably engaged with the base substrate 40 by inserting the support shaft 113 erected on the base substrate 40. A coil spring 149 that urges the trigger cam 111 in one direction with respect to the main cam 110 is wound around the outer periphery of the engagement hole 143.

  The recess 142 is provided with a locking projection 150 for locking the one end 149 a of the coil spring 149. Further, an opening 144 through which the locking protrusion 115 protruding from the storage recess 112 is inserted is formed substantially on the opposite side of the locking protrusion 150 via the locking hole 143. The other end 149 b of the coil spring 149 is locked to the locking protrusion 115 that protrudes from the opening 144 onto the recess 142.

  The trigger cam 111 is biased by the coil spring 149, whereby the switch gear 140 is one end side where the relay gear portion 121a of the disengagement portion 121 is provided in the housing recess 112 of the main cam 110 in FIG. It is always urged to rotate in the direction of arrow D. As a result, as shown in FIG. 17, the cam gear 91 has teeth of the small-diameter gear 102 b on the other end side of the main cam 110 that is not provided with the relay gear portion 121 a of the disengagement portion 121 when the optical disc 3 is waiting to be inserted. An area where neither the gear portion 117 nor the switch gear 140 of the trigger cam 111 is engaged is provided. Further, at this time, the main cam 110 has an initial state in which the gear portion 117 is not engaged with the small-diameter gear 102b because the rotation convex portion 125 is urged in the arrow J direction by the rotation spring 130 and is locked to the rotation restricting portion 131. Stopped in position.

  When the optical disk 3 is inserted into the apparatus main body 2, the trigger cam 111 presses the locking wall 141 a of the guide groove 141 by the trigger lever 96 rotated to the back side of the base substrate 40, and attaches the coil spring 149. It is rotated in the direction of arrow C in FIG. 17 against the force. As a result, as shown in FIG. 18, the trigger cam 111 moves to the other end side where the switch gear 140 can rotate the engagement release portion 121 and engage with the small-diameter gear 102b. Accordingly, the cam gear 91 is rotated in the direction of arrow C in FIG. 18 when the small-diameter gear 102b is engaged with the engagement gear portion 145 and the engagement gear portion 146.

  Here, when the switch gear 140 is rotated by the trigger lever 96 to the other end side of the disengaging part 121 in the direction of arrow C, as shown in FIG. 18, the last one tooth of the occlusal gear part 146, The first tooth of the relay gear part 121a of the disengagement part 121 is continuous. Therefore, in the cam gear 91, the small-diameter gear 102b meshed with the engagement gear portion 145 and the meshing gear portion 146 is meshed with the relay gear portion 121a via the meshing gear portion 146, and subsequently connected to the relay gear portion 121a. The cam drive unit 119 is engaged. In this way, when the optical disk 3 is inserted, the cam gear 91 bridges the engagement with the small diameter gear 102b via the switch gear 140 to the cam drive unit 119, and drives the optical pickup unit 11 and the chucking unit 13. Can do.

  The trigger lever 96 that rotates the trigger cam 111 in the direction in which the switch gear 140 and the small-diameter gear 102b are engaged in accordance with the insertion of the optical disc 3 is a main surface portion via the base substrate 40 as shown in FIGS. It is engaged with a trigger arm 154 provided on the disk transport area 40a and rotated integrally.

  The trigger lever 96 includes a base end portion 155 that is rotatably supported by a rotation shaft 153 that is erected on the back surface of the base substrate 40, and a guide groove 141 of the trigger cam 111 that extends from the base end portion 155. And a lever arm 156 provided with a rotating convex portion 157 to be engaged. The base end portion 155 has a shaft hole 158 through which the rotation shaft 153 is inserted. Further, an engagement pin 160 that protrudes through the opening 159 formed in the base substrate 40 and engages with the trigger arm 154 protrudes from the base end portion 155.

  The trigger arm 154 engaged with the trigger lever 96 via the engagement pin 160 is rotatably supported in the vicinity of the corner portion on the back side on the main surface portion 40 a of the base substrate 40. The trigger arm 154 is formed in a substantially rectangular plate shape, a support portion 161 that is supported by the main surface portion 40a is formed at one end in the longitudinal direction, and an abutment projection that abuts the optical disc 3 at the other end in the longitudinal direction. 162 protrudes. Also, the trigger arm 154 has a hook-shaped locking projection 163 that hangs down toward the main surface portion 40 a of the base substrate 40. The trigger arm 154 is moved along the guide hole 164 while the locking projection 163 slides on the side edge of the arc-shaped guide hole 164 formed in the main surface portion 40a.

  The trigger arm 154 is provided with an engagement hole 165 in which the engagement pin 160 of the trigger lever 96 is engaged. The engagement hole 165 is inserted through the engagement pin 160 protruding toward the main surface portion 40 a through the opening 159 of the base substrate 40, whereby the trigger arm 154 and the trigger lever 96 are engaged with each other. The trigger lever 96 can be rotated according to the rotation.

  The trigger lever 96 and the trigger arm 154 are guided so that the trigger lever 96 is retracted to the retracting portion 147 by the guide groove 141 of the trigger cam 111 when the optical disc 3 is waiting to be inserted. The contact projection 162 is rotated to the front side of the base substrate 40 and is held at a position where it can contact the front side surface of the optical disc 3 in the insertion direction. When the optical disc 3 is transported to the back side of the base substrate 40, the contact projection 162 is pressed against the back side of the optical disc 3, so that the trigger arm 154 and the trigger lever 96 are both on the back side of the base substrate 40. It is rotated. As a result, the trigger lever 96 is moved from the triggering cam 157 to the position where the switch gear 140 can be engaged with the small-diameter gear 102b by the rotation convex portion 157 retracted by the retracting portion 147 pressing the locking wall 141a of the guide groove 141. 111 is rotated. At this time, since the insertion of the optical disc 3 is detected by the detection switch 23, the drive motor 90 is driven and the small-diameter gear 102b is rotated. Therefore, when the switch gear 140 and the small-diameter gear 102b are engaged, Immediately, the cam gear 91 is rotated. The trigger lever 96 and the trigger arm 154 are guided by the guide groove 141 along with the rotation of the cam gear 91 after the rotation convex portion 157 presses the locking wall 141a, so that the contact convex portion 162 of the trigger arm 154 is It is separated from the side surface of the optical disc 3 and is rotatable.

  When the optical disc 3 is ejected, the trigger lever 96 is guided by the retracting portion 147 with the rotating convex portion 157 guided by the guide groove 141 of the trigger cam 111. At this time, the trigger arm 154 engaged with the trigger lever 96 is held at a position where the contact convex portion 162 is rotated to the front surface side of the base substrate 40 and can contact the front side surface of the optical disc 3 in the insertion direction. Waiting for insertion of the optical disk 3 again.

  Next, the rack gear 92 that is engaged with the pickup transport unit 118 formed in the gear portion 117 of the cam gear 91 will be described. As shown in FIG. 12, the rack gear 92 is disposed between the gear portion 52 a of the rack 52 attached to the pickup base 45 and the cam gear 91. Further, as described above, the rack gear 92 is supported at a position where it can be engaged in the upper step in the direction orthogonal to the circumferential direction of the cam gear 91 as shown in FIG. 16, and teeth are formed in the upper step in the same direction. It is rotated by the pick-up transport unit 118. Further, the rack gear 92 is not rotated and does not convey the pickup base 45 when facing the pickup restricting portion 120 in which teeth are not formed on the upper step in a direction orthogonal to the circumferential direction of the cam gear 91.

  Next, the chucking arm control lever 97 engaged with the second rotation groove 123 of the cam gear 91 will be described. The chucking arm control lever 97 moves the chucking arm 63 up and down to chuck the optical disk 3 transported to the back side of the base substrate 40 to the disk table 60 and release chucking. . As shown in FIGS. 21 and 13, the chucking arm control lever 97 is formed with a support hole portion 168 that is pivotally supported by a rotation support shaft 167 standing on the back surface of the base substrate 40. It can be rotated in the direction of arrow F and the direction of counter arrow F in FIG.

  Further, the chucking arm control lever 97 is provided with a guide projection 169 that engages with the second rotation groove 123 of the cam gear 91. As shown in FIG. 19, the chucking arm control lever 97 has the guide convex portion 169 engaged with the second rotation groove 123, so that the cam gear 91 rotates or the arrow F direction in FIG. It is rotated in the direction of the opposite arrow F.

  Further, the chucking arm control lever 97 is exposed on the main surface 40a of the base substrate 40, and a chucking cam 170 for raising and lowering the chucking arm 63 is formed. The chucking cam 170 is provided on a standing wall 171 raised from the main surface of the chucking arm control lever 97, and the standing wall 171 passes through an arc-shaped long hole 172 drilled in the base substrate 40. As a result, as shown in FIG. 9, it faces the main surface 40a. The chucking cam 170 is moved over the main surface 40a from the back side to the front side when the chucking arm control lever 97 is rotated in the direction of arrow F and the direction of the counter arrow F.

  A cam piece 68 provided on the chucking arm 63 is positioned on the movement path of the chucking cam 170. Accordingly, when the chucking cam 170 is moved to the front side on the main surface 40 a, the cam piece 68 of the chucking arm 63 rides on and is constantly urged to rotate toward the base substrate 40 by the urging force of the spring member 67. The chucking arm 63 is separated from the base substrate 40 against the urging force. When the chucking cam 170 is moved to the back side on the main surface portion 40a, the chucking cam 170 is retracted from below the cam piece 68 of the chucking arm 63, and the chucking arm 63 is moved to the base substrate 40 side by the biasing force of the spring member 67. Turn to. As a result, the chucking arm 63 can be moved close to and away from the base substrate 40, and the optical disk 3 is chucked by the disk pressing plate 62 and the disk table 60 provided at the tip of the chucking arm 63. Can be released.

  In the chucking cam 170, an inclined guide portion 170a for guiding the cam piece 68 is formed on the front surface side of the main surface 40a so that the cam piece 68 can easily get on.

  Further, the chucking arm control lever 97 is provided with an engaging convex portion 173 that engages with the roller arm control lever 93, and the roller arm control lever 93 is operated in accordance with the rotation in the arrow F direction and the counter arrow F direction. To do. Accordingly, as the cam gear 91 rotates, the chucking arm control lever 97 operates the roller arm control lever 93 and the operation plate 82 connected to the roller arm control lever 93, and the lock piece 42 is moved to the lock groove of the frame 10. 16 can be engaged and disengaged.

  As shown in FIG. 13, the roller arm control lever 93 is formed in a long shape, and a support hole 175 is formed at a substantially central portion in the longitudinal direction, and a circular convex portion 176 that protrudes from the back surface of the base substrate 40. It is rotatably supported by. Further, the roller arm control lever 93 is formed with an engagement guide groove 177 that engages with the engagement convex portion 173 of the chucking arm control lever 97 at one end in the longitudinal direction. The roller arm control lever 93 moves in the direction indicated by the arrow G in FIG. 13 and the opposite arrow with the support hole 175 as a fulcrum by the engagement projection 173 moving in the engagement guide groove 177 as the chucking arm control lever 97 rotates. It is rotated in the G direction.

  The roller arm control lever 93 has the other end in the longitudinal direction facing the deck portion 40b through an opening 178 provided in a step portion between the main surface portion 40a of the base substrate 40 and the deck portion 40b, An engaging projection 179 that engages with the operation plate 82 is provided in a protruding manner. The engaging convex portion 179 is inserted and engaged with a long hole-like connecting hole 89a formed in the connecting piece 89 of the operation plate 82, and the roller arm control lever 93 is rotated in the arrow G direction and the counter arrow G direction. Then, the operation plate 82 is slid in the arrow H direction and the counter arrow H direction which are the longitudinal directions. When the engagement projection 179 of the roller arm control lever 93 is rotated in the direction of arrow G in FIG. 13, the operation plate 82 is slid in the direction of arrow H in FIG. Is rotated in the direction of arrow B in the figure and engaged with the lock groove 16 formed in the front wall 10 a of the frame 10 to lock the base substrate 40 in a floating state to the frame 10. Further, when the other end portion of the roller arm control lever 93 is rotated in the counter arrow G direction in FIG. 13, the operation plate 82 is slid in the counter arrow H direction in FIG. 9, and the engagement pieces 80, 81 is rotated in the direction of the opposite arrow B in the figure to release the engagement with the lock groove 16 to bring the base substrate 40 into a floating state.

  The operation plate 82 is slid in the direction of arrow H in FIG. 9 so that the projection 88 is retracted from the lower part of the lifting cam 79 provided on the roller arm 72 and rotates the roller arm 72 in the direction of arrow a. The conveyance roller 70 is made to face the conveyance area of the optical disc 3 and the insertion preventing pieces 74 and 74 are lowered from the conveyance area of the optical disc 3. Further, when the operation plate 82 is slid in the direction of the opposite arrow H in FIG. 9, the convex portion 88 pushes up the lifting cam 79 of the roller arm 72 and rotates the roller arm 72 in the opposite arrow a direction. Is retracted from the transport area of the optical disc 3 and the insertion preventing pieces 74 and 74 are allowed to face the transport area of the optical disc 3.

  Next, the switching lever 94 engaged with the first rotation groove 122 of the cam gear 91 will be described. The switching lever 94 transmits the driving force of the drive motor 90 to the disk transport mechanism 12 side when transporting the optical disk 3, and drives the transport roller 70 by separating the driving force of the drive motor 90 from the disk transport mechanism 12 when the transport is completed. Is to stop.

  As shown in FIG. 19, the switching lever 94 is formed in a substantially rectangular shape, and a shaft hole 182 inserted through a rotary shaft 181 projecting from the back surface of the base substrate 40 is formed at a substantially center in the longitudinal direction. The shaft hole 182 serves as a fulcrum and is rotatable in the direction of arrow I and the direction of counter arrow I in FIG. Further, the switching lever 94 is supported by overlapping the first gear 101 engaged with the drive shaft of the drive motor 90 on the rotary shaft 181 as described above, and a small-diameter gear of the first gear 101 at one end in the longitudinal direction. A rocking gear 183 is formed to be engaged with 101b. The swinging gear 183 is connected to or disconnected from the gear train 71 of the disc transport mechanism 12 by the switching lever 94 being swung around the shaft hole 182 as the cam gear 91 rotates. Further, as shown in FIG. 19, the switching lever 94 has a projecting projection 184 that is engaged with the first pivot groove 122 of the cam gear 91 at the other end in the longitudinal direction.

  The switching lever 94 is configured such that the rotation convex portion 184 is guided by the first rotation groove 122 of the cam gear 91 when the optical disk 3 is waiting to be inserted and when the optical disk 3 is conveyed inside and outside the apparatus body 2. The swing gear 183 is rotated in the direction of arrow I in FIG. 12, which is connected to the gear train 71 of the disk transport mechanism 12. As a result, the driving force of the driving motor 90 is transmitted to the gear train 71 via the first gear 101 and the swing gear 183, and the conveying roller 70 is rotationally driven.

  When the optical disk 3 is transported into the apparatus main body and the cam gear 91 is rotationally driven, the switching lever 94 guides the rotational projection 184 to the first rotational groove 122, and the swing gear 183 and the disk transport mechanism. 12 is rotated in the direction of the arrow I in FIG. As a result, the driving force of the drive motor 90 is not transmitted to the disc transport mechanism 12 via the swing gear 183, and the rotation of the transport roller 70 is stopped.

  Next, a series of operations of the disc loading apparatus 1 configured as described above will be described. First, at the time of waiting for the optical disk 3 to be inserted, as shown in FIGS. 17 and 22, the cam gear 91 is rotated by the rotation restricting portion 131 while the rotation convex portion 125 of the main cam 110 is urged by the rotation spring 130. By being restricted, the gear portion 117 is stopped at an initial position where it does not mesh with the small-diameter gear 102b. The cam gear 91 is rotated toward one end of the disengaging part 121 where the trigger cam 111 is biased by the coil spring 149 and the switch gear 140 and the small diameter gear 102b are not engaged. Therefore, the driving force of the driving motor 90 is not transmitted to the cam gear 91.

  In the state where the rotational position of the main cam 110 of the cam gear 91 is restricted to the initial position, the trigger lever 96 is retracted by the retracting portion 147 from the rotating convex portion 157 engaged with the guide groove 141 of the trigger cam 111. ing. Further, the trigger arm 154 engaged with the trigger lever 96 is stopped at a position where the contact convex portion 162 is rotated to the front surface side of the base substrate 40 and can contact the front side surface in the optical disc 3 insertion direction.

  Further, the switching lever 94 engaged with the first rotation groove 122 of the main cam 110 is rotated in the direction of arrow I in FIG. 12 where the swing gear 183 and the gear train 71 of the disk transport mechanism 12 are engaged, The drive motor 90 and the conveyance roller 70 are connected. Further, the chucking arm control lever 97 engaged with the second rotation groove 123 of the main cam 110 rotates in the direction indicated by the arrow F in FIG. 13 which rotates the chucking cam 170 toward the front side of the base substrate 40. As a result, the cam piece 68 of the chucking arm 63 rides on the chucking cam 170 so that the disc pressing plate 62 and the disc table 60 are separated from each other. Further, the roller arm control lever 93 engaged with the chucking arm control lever 97 rotates in the direction of the opposite arrow G in FIG. 13 for engaging the pair of engagement pieces 80 and 81 with the lock groove 16 of the frame 10. Has been. As a result, the operation plate 82 is slid in the direction indicated by the arrow H in FIG. 9, and the engaging portions 80 b and 81 b of the engaging pieces 80 and 81 are rotated in the direction indicated by the arrow B in FIG. The base substrate 40 is locked to the frame 10 by engaging with the groove 16.

  Further, when the operation plate 82 is slid in the direction of the arrow H in FIG. 9, the raising / lowering portion 88 a of the convex portion 88 provided on the operation plate 82 is retracted from the lower portion of the raising / lowering cam 79 of the roller arm 72. Accordingly, the roller arm 72 is rotated in the direction of arrow A in FIG. 22B by the urging force of the coil spring 78 so that the transport roller 70 faces the transport region of the optical disk 3 and the gear train 71, the transport roller 70, and the like. Are concatenated.

  Further, the disk detection pin 22 disposed on the frame 10 is slidably biased toward the concave portion 15 by the biasing force of the coil spring 24, thereby pressing the first detection switch 23a.

  As shown in FIGS. 23A, 23B, and 6, when the optical disk 3 is inserted by the user from the disk insertion / removal port 32 of the main body panel 5, the disk detection pin 22 is pressed to the front side surface in the insertion direction. , Slides left and right. As a result, the disc detection pin 22 releases the pressed state of the first detection switch 23a, so that the insertion of the optical disc 3 is detected, and the drive motor 90 is driven forward.

  By driving the drive motor 90, the transport roller 70 is driven to rotate forward via the first gear 101, the swinging gear 183 of the switching lever 94, and the gear train 71, and the optical disk 3 is drawn into the housing 4. Go.

  At this time, the second gear 102 engaged with the first gear 101 is also rotated. However, since the small-diameter gear 102b of the second gear 102 is opposed to the disengagement portion 121 of the cam gear 91, the cam gear 91 Is never rotated.

  Further, since the base substrate 40 is fixed to the frame 10 by the engagement between the lock piece 42 and the lock groove 16, the optical disk 3 being transported does not swing in the recording / reproducing unit 14 without the base substrate 40 swinging. There is no collision with the optical pickup 11 or the disk table 60 or the like.

  As shown in FIGS. 24A and 24B and FIG. 18, when the optical disk 3 is transported into the housing 4, the contact convex portion 162 of the trigger arm 154 rotated to the disk transporting area is changed to the optical disk. 3 is brought into contact with the front side surface in the insertion direction and rotated to the back side. As a result, the trigger lever 96 engaged with the trigger arm 154 is rotated to the rear side, so that the rotation convex portion 157 that has been retracted to the retracting portion 147 of the guide groove 141 of the trigger cam 111 is the guide groove 141. The locking wall 141a is pressed. When the trigger cam 111 is pressed by the trigger lever 96, the switch gear 140 rotates from one end side of the disengagement portion 121 shown in FIG. 17 to the other end side engageable with the small-diameter gear 102b shown in FIG. Moved. Therefore, the cam gear 91 is engaged with the small-diameter gear 102b in which the engagement gear portion 145 of the switch gear 140 is driven to rotate forward by receiving the driving force of the drive motor 90, and is rotated in the direction of arrow C in FIG.

  As shown in FIG. 18, the meshing gear portion 146 of the switch gear 140 is connected to the relay gear portion 121a provided in the disengagement portion 121 of the main cam 110 with the last tooth, so that the small-diameter gear 102b and the cam gear are connected. 91 is moved from the meshing gear portion 146 of the switch gear 140 to the cam driving portion 119 via the relay gear portion 121a. As shown in FIGS. 25 (a) and 25 (b), when the small-diameter gear 102b and the cam drive unit 119 are engaged, the cam gear 91 is further rotated in the arrow C direction.

  As shown in FIGS. 26 (a) and 26 (b), when the cam gear 91 is rotated in the direction of arrow C, the switching lever 94 is guided by the first rotating groove 122 formed on the back surface of the main cam 110, It is rotated in the direction of the opposite arrow I. As a result, the swing gear 183 provided on the switching lever 94 is separated from the gear train 71 and stops driving the conveying roller 70. By this time, the optical disc 3 has been transported to a centering position where the center hole and the disc table 60 are substantially opposed.

  Further, when the cam gear 91 is rotated in the arrow C direction, the chucking arm control lever 97 is guided by the second rotation groove 123 formed on the back surface of the main cam 110 and is rotated in the arrow F direction. As a result, the chucking cam 170 of the chucking arm control lever 97 is moved to the back side of the base substrate 40 and retracts from the lower portion of the cam piece 68 of the chucking arm 63. Therefore, as shown in FIGS. 27A and 27B, the chucking arm 63 is brought close to the base substrate 40 by the urging force of the spring member 67, and the optical disk 3 can be rotated by the disk pressing plate 62 and the disk table 60. Hold it.

  Further, when the chucking arm control lever 97 is rotated in the direction of arrow F, the roller arm control lever 93 connected to the chucking arm control lever 97 is rotated in the direction of arrow G in FIG. As a result, the operation plate 82 connected to the roller arm control lever 93 is slid in the direction of the arrow H in FIG. When the operation plate 82 is slid in the direction of the opposite arrow H, the lock pieces 42 engaged with the operation plate 82 are also engaged with the engagement portions 80 b and 81 b and the lock groove 16. It is rotated in the direction of the opposite arrow B to cancel the combination. Therefore, the base substrate 40 fixed to the frame 10 by the lock piece 42 is supported in a floating state on the frame 10 by the damper 20.

  In addition, when the operation plate 82 is slid in the direction of the opposite arrow H, as shown in FIGS. 28A and 28B, the raising and lowering portion 88 a of the convex portion 88 provided on the operation plate 82 is the back surface of the roller arm 72. Is slid to the lower part of the raising / lowering cam 79 provided in the upper part, and pushes the raising / lowering cam 79 upward. As a result, the roller arm 72 is rotated in the opposite arrow A direction in which the transport roller 70 is retracted from the disk transport region with the support hole 77 as a fulcrum. Further, when the roller arm 72 is rotated in the same direction, an insertion preventing piece 74 for preventing double insertion of the optical disk 2 is exposed on the disk transport area.

  At this time, since the rack gear 92 and the pickup restricting portion 120 are opposed to each other in the cam gear 91, the pickup base 45 is not driven while being held on the inner peripheral side. Further, the rotation convex portion 157 of the trigger lever 96 is rotated to the back side of the base substrate 40 by being guided by the guide groove 141, and the trigger arm 154 engaged with the trigger lever 96 is similarly the base substrate. It is rotated to the back side. As a result, the contact protrusion 162 of the trigger arm 154 is separated from the outer periphery of the optical disc 3 and does not hinder the rotational drive of the optical disc 3.

  Next, when the cam gear 91 is further rotated in the direction of arrow C, the rack gear 92 and the pickup transport unit 118 are opposed to each other, and the rack gear 92 is rotated. As shown in FIGS. 29A and 29B, when the rack gear 92 is rotated, the pickup base 45 to which the rack 52 is attached is conveyed in the radial direction of the optical disc 3. The pickup base 45 is conveyed to the innermost peripheral side of the optical disk 3 at the initial position, is provided in the vicinity of the disk table 60 of the base substrate 40, and has a tip extending to the pickup opening 47. (Not shown) is pressed. When the pickup base 45 is conveyed to the outer peripheral side of the optical disk 3 via the rack gear 92, it is detected that the pickup base 45 has moved to the information signal recording / reproducing step by the optical pickup unit 11 because it is separated from the pickup detection switch.

  In the recording / reproducing process of the information signal with respect to the optical disc 3, the drive motor 90 is appropriately rotated forward or reversely to convey the pickup base 45 over the inner and outer circumferences of the optical disc 3. When the recording / reproducing operation with respect to the optical disc 3 is completed, the pickup base 45 is transported to the innermost peripheral side of the optical disc 3, so that the pickup detection switch is pressed. Thereby, it is detected that the recording / reproducing process for the optical disc 3 is completed.

  At this time, the disk loading apparatus 1 transmits the vibration applied to the housing 4 in the recording / reproducing process to the recording / reproducing unit 14 via the frame 10 because the base substrate 40 is supported in a floating state with respect to the frame 10. Can be prevented. Therefore, when the disk loading device 1 is applied to, for example, a vehicle-mounted disk drive device, stable recording / reproducing characteristics can be maintained even by vibration applied to the housing 4 via the vehicle body.

  Even when the pickup base 45 is transported to the outermost peripheral side of the optical disc 3 in the recording / reproducing process of the optical disc 3, the cam gear 91 is connected to the rotating convex portion 125 projecting from the back surface of the main cam 110 and the base substrate 40. The cam gear 91 can be rotated and the pickup base 45 can be transported without being obstructed by the rotation restricting portion 131 because the rotation restricting portion 131 is not rotated to a position where it comes into contact with the rotation restricting portion 131.

  Next, the ejection process of the optical disk 3 will be described. When an instruction to eject the optical disk 3 is given, first, the drive motor 90 is driven in reverse, and the cam gear 91 is rotated in the direction of arrow D opposite to the direction of arrow C. As a result, the chucking arm control lever 97 and the switching lever 94 operate in reverse to the insertion process of the optical disc 3.

  That is, when the chucking arm control lever 97 is guided by the second rotation groove 123 and rotated in the counter arrow F direction, the roller arm control lever 93 is rotated in the counter arrow G direction in FIG. The operation plate 82 connected to the roller arm control lever 93 is slid in the arrow H direction.

  When the operation plate 82 is slid in the arrow H direction, the lock piece 42 is rotated in the arrow B direction in which the engagement pieces 80 and 81 are engaged with the engagement portions 80 b and 81 b and the lock groove 16. . Thereby, since the base substrate 40 is fixed to the frame 10, the swing of the recording / reproducing unit 14 that has been floating-supported is prevented. Therefore, the optical disk 3 is prevented from colliding with the disk table 60, the pickup base 45, etc. in the ejecting process of the optical disk 3.

  Further, when the operation panel 82 is slid in the arrow H direction, the elevating part 88a of the convex part 88 is retracted from the lower part of the elevating cam 79 of the roller arm 72, and the roller arm 72 is rotated in the arrow A direction. Accordingly, the transport roller 70 supported by the roller arm 72 is raised onto the disk transport area, and the insertion preventing piece 74 is retracted from the disk transport area.

  Further, when the chucking arm control lever 97 is rotated in the direction of the opposite arrow F, the chucking cam 170 of the chucking arm control lever 97 is moved to the front side of the base substrate 40 and the cam of the chucking arm 63 is moved. The piece 68 is pushed upward. Therefore, the chucking arm 63 is separated from the base substrate 40 against the urging force of the spring member 67 and releases the chucking of the optical disk 3 by the disk pressing plate 62 and the disk table 60.

  When the recording / reproducing process is completed and the pickup base 45 is conveyed to the innermost peripheral side, and the cam gear 91 is further rotated in the direction of arrow D, the cam gear 91 is opposed to the rack gear 92 and the pickup restricting portion 120. The pickup base 45 is not transported.

  When the recording / reproducing unit 14 is fixed to the frame 10 and the conveying roller 70 is raised onto the disk conveying area and the chucking of the optical disk 3 is released, the switching lever 94 is guided by the first rotating groove 122. The swinging gear 183 is connected to the gear train 71 by being rotated in the direction of the arrow I. As a result, the driving force of the driving motor 90 is transmitted to the gear train 71 via the first gear 101 and the swinging gear 183, and the conveying roller 70 is driven in the reverse direction, so that the optical disc 3 is ejected out of the housing 4. Go.

  When the switching lever 94 is rotated, the main cam 110 is further rotated in the direction of the arrow D, and the cam gear 91 is moved to one end side of the disengaging part 121 of the main cam 110 by the biasing force of the small-diameter gear 102b and the coil spring 149. The switch gear 140 of the sliding trigger cam 111 is engaged. When the small-diameter gear 102b is engaged with the meshing gear portion 146 of the switch gear 140, the small-diameter gear 102b is also meshed with the relay gear portion 121a of the main cam 110 formed up to the lower stage of the gear portion 117. 111, but when engaged with the engaging gear portion 145 of the switch gear 140, the gear portion 117 of the main cam 110 is not engaged.

  At this time, in the main cam 110, the rotation convex portion 125 protruding from the back surface is moved to the one end 130a side from the bent portion 130c of the rotation spring 130 provided on the back surface of the base substrate 40. It is biased in the direction of arrow J in FIG. 13, that is, in the direction of arrow D in FIG. Therefore, when the main cam 110 is rotated until the small-diameter gear 102b and the engagement gear portion 145 of the switch gear 140 are engaged, as shown in FIG. And the rotation convex portion 125 is stopped at a position where it comes into contact with the rotation restricting portion 131.

  The trigger cam 111 is also rotated in the direction of the arrow D by the biasing force of the coil spring 149 because the engagement of the switch gear 140 with the engagement gear portion 145 is released by further rotating the small-diameter gear 102b. It engages with one end side of the disengaging part 121 of the main cam 110. As a result, as shown in FIG. 17, the cam gear 91 is opposed to the small diameter gear 102 b and the disengagement portion 121, and is not engaged with any of the gear portion 117 of the main cam 110 and the switch gear 140 of the trigger cam 111. Therefore, the cam gear 91 is not rotated even when the small-diameter gear 102b is driven in reverse.

  Further, when the trigger cam 111 is rotated in the direction of arrow D, the turning convex portion 157 of the trigger lever 96 guided by the guide groove 141 of the trigger cam 111 is guided to be retracted by the retracting portion 147. As a result, the trigger arm 154 engaged with the trigger lever 96 rotates the contact convex portion 162 to the transport area of the optical disc 3 and waits for the insertion of the optical disc 3 again.

  At this time, the conveying roller 70 receiving the driving force of the driving motor 90 continues to eject the optical disc 3, and the disc detection pin 22 is slid by the outer peripheral portion of the optical disc 3 and the detection switch 23 is operated. Specifically, when the central hole of the optical disk 3 is discharged to the vicinity of the disk insertion / removal port 32, the second detection switch 23b is pressed by the disk detection pin 22, and further discharged, whereby the second detection switch 23b is turned on. The pressed state is released. The disc loading apparatus 1 detects that the optical disc 3 has been transported to the ejection position when the second detection switch 23b is depressed in the ejection process of the optical disc 3 and the depressed state is released, and the drive motor 90 is turned on. Stop.

  In the ejecting process, the disc loading device 1 indicates that the optical disc 3 has been reinserted when the second detection switch 23b is pressed again after the drive motor 90 is stopped as shown in FIG. Then, the drive motor 90 is driven to rotate in the forward direction, and the optical disk 3 is drawn into the frame 10 again. This re-insertion process of the optical disk 3 is the same as the above-described process in which the drive motor 90 is driven to rotate forward and the optical disk 3 is pulled.

  As described above, the present disk loading apparatus 1 uses the single drive motor provided in the drive unit 41 to insert and eject the optical disk 3, transport the pickup base 45 of the optical pickup unit 11, and raise and lower the chucking arm 63. 3 can be fixed and floating by chucking and unchucking 3 and rotating the lock piece 42. In the present disk loading apparatus 1, only the minimum necessary motors of the spindle motor 61 and the drive motor 90 are arranged on the base substrate 40, so that the space of the base substrate 40 is reduced and the casing 4 and the apparatus main body 2 are also saved. Can be miniaturized.

  In the disk loading apparatus 1, a transport roller 70 is extended on the front side of the base substrate 40 in a direction orthogonal to the insertion / removal direction of the optical disk 3, and a disk table 60 and a spindle motor are arranged at the approximate center of the base substrate 40. The optical pickup unit 11 is provided from approximately the center of the base substrate 40 to one corner portion on the back side. The drive unit 41 is disposed from the approximate center of the base substrate 40 to the other corner portion on the back side.

  The base substrate 40 is formed so that the optical disk 3 is substantially inscribed or slightly smaller than that. However, by disposing the base substrate 40 as described above, substantially the same space as the optical disk 3 can be used efficiently. The optical disk 3 can be disposed in a frame 10 that is formed in a size that allows the optical disk 3 to be inscribed therein. Therefore, the disk loading device 1 can reduce the size of the casing 4 and the size of the device main body 2.

  The case where the present invention is applied to an in-vehicle disk recording / reproducing apparatus has been described above. However, the present invention is not limited thereto, and is incorporated in, for example, a stationary disk recording / reproducing apparatus or a drive bay of a personal computer. The present invention can also be applied to a disc recording and / or reproducing device used for recording.

1 is a perspective view showing a disk loading device to which the present invention is applied. It is a disassembled perspective view which shows an apparatus main body. It is a front view which shows a housing | casing from the front wall side of a flame | frame. It is a perspective view which shows a flame | frame. It is a top view which shows the housing | casing in which the optical disk was inserted or discharged | emitted. It is a top view which shows the disc loading apparatus which detected that the optical disc was inserted. It is a top view which shows the disc loading apparatus which detected that the optical disc was conveyed to the discharge position. It is a top view which shows the disc loading apparatus which detected that the optical disc was reinserted. It is a disassembled perspective view which shows a recording / reproducing part. It is a perspective view which shows the chucking arm of a recording / reproducing part. It is a side view which shows an optical pick-up part. It is a top view which shows a base substrate from the back surface side. It is a top view which removes a cam gear and a trigger lever from the back surface of a base board. It is a perspective view which shows a cam gear. It is a perspective view which shows the main cam and trigger cam which comprise a cam gear. It is a figure for demonstrating the gear part of a cam gear. It is a perspective view which shows the occlusion state of a small diameter gear and a cam gear. It is a perspective view which shows the occlusion state of a small diameter gear and a cam gear. It is a top view which shows the back surface of a main cam. It is a perspective view which shows a trigger lever and a trigger arm. It is a perspective view which shows a chucking arm control lever. It is a figure which shows the insertion waiting state of the optical disk of a disk loading apparatus. It is a figure which shows the state in which the optical disk of the disk loading apparatus was inserted. It is a figure which shows the state by which the trigger cam of the disk loading apparatus was rotated. It is a figure which shows the state by which the main cam of the disc loading apparatus was rotated. It is a figure which shows the state from which the disc conveyance mechanism was cut away from the drive motor by the switching lever of the disc loading device. It is a figure which shows the state which chucked the optical disk of the disk loading apparatus. It is a figure which shows the state which the conveyance roller of the disk loading apparatus evacuated from the disk conveyance area | region. It is a figure which shows the state by which the pick-up base of the disc loading apparatus was enabled to convey.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disc loading apparatus, 2 apparatus main body, 3 optical disk, 4 housing | casing, 5 main body panel, 6 top cover, 10 frame, 11 optical pick-up part, 12 disc conveyance mechanism, 13 chucking part, 14 recording / reproducing part, 15 recessed part, 16 Lock groove, 17 Locking piece, 20 Damper, 21 Printed wiring board, 22 Disc detection pin, 23 Detection switch, 31 Display unit, 32 Disc insertion / removal port, 40 Base board, 41 Drive unit, 42 Lock piece, 45 Pickup base , 47 Pickup opening, 52 rack, 60 disc table, 62 disc holding plate, 63 chucking arm, 68 cam piece, 70 transport roller, 71 gear train, 72 roller arm, 79 lift cam, 82 operation plate, 88 convex Part, 90 drive motor, 91 units Gear, 92 rack gear, 93 roller arm control lever, 94 switching lever, 95 gear train, 96 trigger lever, 97 chucking arm control lever, 101 first gear, 102 second gear, 110 main cam, 111 trigger cam, 117 Gear section, 118 pickup transport section, 119 cam drive section, 120 pickup restriction section, 121 disengagement section, 121a relay gear section, 122 first rotation groove, 123 second rotation groove, 125 rotation convex section, 130 Rotating spring, 131 Rotation restricting portion, 140 Switch gear, 145 Engaging gear portion, 146 Occlusal gear portion, 154 Trigger arm, 170 Chucking cam

Claims (9)

A housing,
An optical pickup mechanism for recording and / or reproducing information signals with respect to a disc;
A disk chucking mechanism for operating a chucking plate for rotatably holding the disk;
A disk transport mechanism for operating a transport unit for transporting the disk over the inside and outside of the housing;
A disk loading device having one drive motor and a drive unit including a drive member that drives the optical pickup mechanism, the disk chucking mechanism, and the disk transport mechanism by being driven by the drive force of the drive motor .   2. The disk loading according to claim 1, wherein the optical pickup mechanism, the disk chucking mechanism, the disk transport mechanism, and the drive unit are disposed on the same plane of a base substrate disposed in the casing. apparatus. Furthermore, an engagement / disengagement mechanism for engaging / disengaging the drive motor and the drive member is provided,
The engagement / disengagement mechanism includes a trigger mechanism that engages the drive member with the drive motor when the disc is conveyed into the housing, and the drive member when the disc is ejected from the housing. 2. The disk loading device according to claim 1, wherein the drive member is provided at a position where the engagement with the drive motor is released. The base substrate is supported by the housing in a floating state,
3. The disk loading apparatus according to claim 2, wherein the driving unit operates a lock piece for fixing the base substrate to the housing. The housing is formed in a substantially rectangular shape having a size that allows the disc to be inscribed therein, and the substantially rectangular base substrate in which the optical pickup mechanism, the disc chucking mechanism, the disc transport mechanism, and the drive unit are disposed. Is arranged,
In the base substrate, the disk transport mechanism is disposed on the front surface side where the disk is inserted and removed, the disk chucking mechanism is disposed substantially in the center, and the optical pickup extends from approximately the center to one corner portion on the back surface side. 2. The disk loading apparatus according to claim 1, wherein a drive portion is provided from a substantially central portion to the other corner portion on the back side. A housing,
An optical pickup mechanism for recording and / or reproducing information signals with respect to a disc;
A disk chucking mechanism for rotatably holding the disk;
A disk transport mechanism for transporting the disk over the inside and outside of the housing;
A cam gear which forms a drive motor and a disengagement mechanism with the drive motor, and is linked to the optical pickup mechanism, the disk chucking mechanism, and the disk transport mechanism by being rotated by receiving the driving force of the drive motor. And a drive unit having
When the disc is inserted, the drive unit drives the disc transport mechanism to pull the disc into the housing, and then engages the cam gear and the drive motor by the engagement / disengagement mechanism to rotate the cam gear. A disk loading device that sequentially separates the disk transport mechanism from the drive motor, chucks the disk by the chucking mechanism, and transports the optical pickup mechanism in the radial direction of the disk.   The cam gear is formed with a gear connected to the drive motor, a gear portion that meshes with a rack gear that transports the optical pickup mechanism, and a guide groove that operates the disk chucking mechanism and the disk transport mechanism. The disk loading apparatus according to claim 6.   The engaging / disengaging mechanism includes a trigger mechanism that engages the cam gear with the drive motor when the disk is pulled into the housing, and the cam gear and the drive motor when the disk is ejected from the housing. 7. A disk loading device according to claim 6, further comprising an urging mechanism for urging and urging the cam gear at a position for releasing the engagement. The optical pickup mechanism, the disk chucking mechanism, the disk transport mechanism, and the drive unit are disposed on a base substrate that is floatingly supported in the housing.
7. The disk loading apparatus according to claim 6, wherein the drive unit operates a lock piece for fixing the base substrate to the housing when the disk is inserted and ejected.

Images