JP3928661B2 - Disc recording and / or playback device - Google Patents

Description

The present invention utilizes the rotation of the disc table for rotating the disc, about the recording and / or reproducing apparatus for a disc player or the like to perform the control eject the disk.

  2. Description of the Related Art Conventionally, there has been proposed a disc player configured to record or reproduce an information signal using a recording disc such as an optical disc or a magneto-optical disc as a recording medium.

  In such a disc player, the recording disc is positioned and held with reference to a circular positioning hole (chucking hole) provided in the center. That is, the disc player has a disc table that has a positioning projection inserted into the positioning hole and is rotated by a spindle motor. The disk table positions and holds the recording disk by fitting positioning protrusions into the positioning holes of the recording disk, and rotates the recording disk by being rotated by a spindle motor.

  In a disc player, an information signal is written to or read from a recording disc held on a disc table and rotated.

  The disc player is provided with an ejection mechanism configured to prohibit an ejection operation for removing the recording disc from the disc table while an information signal is being written to or read from the recording disc. .

  As shown in FIG. 10, this ejection mechanism has a first ejection slider 117 and a second ejection slider 118. These eject sliders 117 and 118 are slidably attached along the outer surface of the housing of the disc player.

  The first eject slider 117 is provided with an eject knob 116 for manually sliding operation. When the first eject slider 117 is slid in the direction of the arrow c in FIG. 10 by operating the eject knob 116, the first eject slider 117 is moved to the arrow d in FIG. The second eject slider 118 is slid in the direction.

  That is, the first eject slider 117 presses the eject mediating piece 115 of the eject mediating lever 111 to move the eject mediating lever 111, and presses and moves the second ejecting slider 118 via the eject mediating piece 115. . The first eject slider 117 cannot slide to a position where the second eject slider 118 is directly pressed. If the eject mediating piece 115 is not interposed, the second eject slider 118 can be slid. I can't.

  When the second eject slider 118 is slid, it performs an operation such as opening the lid of the housing of the disc player, and executes an eject operation for removing the recording disc from the disc table.

  The eject mediating lever 111 is movably disposed on an eject prohibiting lever 106 disposed in the housing of the disc player, and the eject mediating piece 115 is protruded outward of the housing so that the first and second The eject sliders 117 and 118 are inserted.

  The eject mediating lever 111 has support holes 110 and 110, and the support shafts 110 and 110 are inserted into the support shafts 109 and 109 so that the support shafts 110 and 110 are inserted into the support holes 110 and 110. It is arranged. The ejection mediating lever 111 has a spring latching portion 113, and an ejection mediating piece portion is formed by a tension coil spring 114 stretched between the spring latching portion 113 and the spring latching portion 112 of the ejection prohibiting lever 106. 115 is urged and positioned in the direction of arrow b in FIG. 10 in the direction in which 115 is moved between the eject sliders 117 and 118.

  The ejection prohibiting lever 106 has support slits 108, 108. By inserting support shafts 107, 107 provided in the housing into the support slits 108, 108, the eject mediating piece 115 is moved to the eject sliders 117, 118. 10 is supported so as to be slidable in the direction of arrow a in FIG.

  The ejection prohibition slider 106 is slid by an ejection prohibition motor 101 disposed in the housing. That is, the drive gear 102 is attached to the drive shaft of the ejection prohibiting motor 101. A transmission gear 120 is engaged with the drive gear 102. A worm gear 103 is coaxially and integrally attached to the transmission gear 120. The worm gear 103 is engaged with the worm wheel 104. A driven gear 119 is coaxially and integrally attached to the worm wheel 104. The driven gear 119 meshes with the rack gear 105 formed on the ejection prohibiting lever 106.

  In this disc player, while the information signal is being written to or read from the recording disc, the ejection prohibiting motor 101 exits the ejection prohibiting lever 106 and the ejection mediating piece 115 exits between the ejection sliders 117 and 118. Slide to the specified position. At this time, even if the first eject slider 117 is slid, the second eject slider 118 cannot be slid, and the eject operation cannot be executed.

  In this disc player, when the information signal is not written to or read from the recording disc, the eject prohibiting motor 101 moves the eject prohibiting lever 106 and the eject mediating piece 115 is located between the eject sliders 117 and 118. Slide to the position to enter. At this time, when the first eject slider 117 is slid, the second eject slider 118 is slid to execute the eject operation.

In addition to the spindle motor, the disk player as described above requires an ejection prohibiting motor, an optical pickup device, and a motor for moving the magnetic head device. As a result, the number of motors to be used increases, the apparatus configuration becomes complicated, and the size increases.
Has been invited.

  If the driving force of one motor can be used for a plurality of applications, the number of motors required for the configuration of the apparatus can be reduced. However, in the above-described disc player, the driving force of each motor is used for each dedicated purpose. The number of motors cannot be reduced.

Therefore, the present invention has been proposed in view of the above circumstances, and the driving force of the spindle motor can be used for other uses of the rotation operation of the recording disk, and the number of motors to be used is reduced. It is an object of the present invention to provide a disc recording and / or reproducing apparatus that can be reduced.

A disc recording and / or reproducing apparatus to which the present invention proposed for achieving the object as described above is applied includes an outer casing provided with a lid, and a lock means for maintaining the lid in a closed state. ,
A spindle motor, a drive shaft that is rotationally driven by the spindle motor, a disk table that is attached by fitting a fitting hole provided in a central portion to the drive shaft, and is rotated by the spindle motor, and the disk When the first lever is moved between the first position and the second position in conjunction with the rotation of the table and the first lever is operated when the first lever is located at the first position. The first lever is engaged to unlock the locking means, and the first lever is operated when the first lever is located at the second position. And operating means that is disengaged from the lever .

In the disc recording and / or reproducing apparatus according to the present invention, the second lever connected to the first lever, the first lever and the second lever can be moved integrally, And an urging member that rotatably connects the first lever to the second lever .

The disc recording and / or reproducing apparatus according to the present invention further includes the above-described first lever being biased in the first position direction when the first lever is in the first position. When the first lever is in the second position, a bi-directional biasing spring is provided to bias the first lever so that the first lever is biased in the second position direction.

The operating means used in the disc recording and / or reproducing apparatus according to the present invention comprises a first operating member and a second operating member, and when the first lever is in the first position, The tip of the first lever is interposed between the first operating member and the second operating member, and the first operating member is operated, whereby the first operating member is moved to the first operating member. engages the distal end of the lever, the first lever unlocks the second operating member is moving operation the locking means by rotation.

The present invention controls the locking of the lid by controlling the locking means for maintaining the lid provided on the outer casing in the closed state by utilizing the rotation of the disk table for rotating the recording disk. The number of drive motors for operating the lock means can be reduced, the mechanism can be simplified, and the entire apparatus can be reduced in size.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

  In this example, the present invention is applied to a disk player that records and reproduces information signals using a disk cartridge.

  The disk cartridge used in this disk player is a cartridge in which a recording disk on which an information signal is recorded, such as an optical disk or a magneto-optical disk, is rotatably stored in the cartridge.

  A magneto-optical disk, which is a recording disk used as an information signal recording medium in this disk player, has a signal recording layer made of a magnetic material on a disk substrate made of a transparent synthetic resin material such as polycarbonate having a diameter of about 64 mm. It is formed by wearing.

  This signal recording layer is locally heated above the so-called Curie temperature by means such as irradiation of a focused laser beam, and an information signal is written by applying an external magnetic field to the heated portion. The The information signal thus written is read out by irradiating the signal recording layer with a light beam such as a laser beam and detecting the reflected light beam of the light beam.

  An optical disk, which is a recording disk used in the disk player device, is configured by depositing a reflective layer made of a metal material such as aluminum on a disk substrate similar to the disk substrate of a magneto-optical disk. On the disk substrate of this optical disk, fine pit rows corresponding to information signals are formed by means such as injection molding.

  The information signal written on the optical disk is read out by irradiating the pit row with a light beam such as a laser beam and detecting the reflected light beam of the light beam.

  As shown in FIGS. 6 to 9, the magneto-optical disk and the optical disk are rotatably accommodated in cartridges 205 and 216 to constitute a disk cartridge.

  The cartridge 205 constituting the recording / reproducing disk cartridge 220 containing the magneto-optical disk is formed in a thin casing shape having a rectangular main surface portion whose side length substantially corresponds to the diameter of the magneto-optical disk. Yes. As shown in FIG. 6, the cartridge 205 has a magnetic head opening 223 for allowing a part of the signal recording surface of the magneto-optical disk to face outward on the main surface on the upper surface side. Further, as shown in FIG. 7, the cartridge 205 has an optical pickup opening 222 at a position facing the magnetic head opening 223 on the lower surface side main surface portion, and the lower surface side main surface portion is substantially the same. A chucking opening 213 is provided in the central portion. The recording / reproducing disc cartridge 220 is inserted into and attached to the disc player in the direction indicated by the arrow M in FIGS.

  A magnetic head opening 223 and an optical pickup opening 222 provided in the cartridge 205 of the recording / reproducing disk cartridge 220 can be opened and closed by a shutter member 206. The shutter member 206 includes a shutter plate corresponding to the openings 223 and 222 and facing each other in parallel, and a connecting portion that connects one end side of the shutter plate, and is made of a synthetic resin material or a metal material. , Are configured integrally. The shutter member 206 has a connecting portion slidably supported in a support groove 207 formed on one side of the cartridge 205. That is, the shutter member 206 slides rearward along one side portion of the cartridge 205 to open the openings 223 and 222, and slides forward from the rear side to return to the initial position. The openings 223 and 222 are closed by the shutter plate.

  The cartridge 216 constituting the read-only disc cartridge 221 containing the optical disc is formed in a thin casing shape having a rectangular main surface portion whose side length substantially corresponds to the diameter of the optical disc. As shown in FIG. 8, the cartridge 216 does not have an opening in the main surface portion on the upper surface side. As shown in FIG. 9, the cartridge 216 has an optical pickup opening 222 in the main surface portion on the lower surface side, and has a chucking opening portion 213 in a substantially central portion of the main surface portion on the lower surface side. Yes. This read-only disc cartridge 221 is inserted into and attached to the disc player in the direction indicated by the arrow M in FIGS.

  In the cartridge 216 of the read-only disk cartridge 221, the optical pickup opening 222 can be opened and closed by a shutter member 217. The shutter member 217 has a shutter plate corresponding to the optical pickup opening 222 and a support portion provided on one end side of the shutter plate, and is integrally formed of a synthetic resin material or a metal material. Yes. The shutter member 217 slidably supports a support portion in a support groove 207 formed on one side of the cartridge 216. That is, the shutter member 217 slides backward along one side of the cartridge 216 to open the optical pickup opening 222, and slides forward from the rear side to return to the initial position. The optical pickup opening 222 is closed with the plate.

  In each of the shutter members 206 and 217, a shutter closing hole 208 is opened at a substantially central position of the connecting portion or the supporting portion toward the side. The shutter closing hole 208 is for engaging with a member for closing the shutter members 206 and 217 when the disc player is mounted.

  A circular positioning hole (chucking hole) 204 is formed at the center of the magneto-optical disk and the optical disk. The positioning hole 204 is closed by the chucking plate 202 from the upper surface side. The chucking plate 202 is formed in a disk shape having a diameter corresponding to the positioning hole 204 by using a magnetic metal material such as iron or stainless steel. The positioning hole 204 and the chucking plate 202 face the outside of the cartridges 205 and 216 through the chucking opening 213.

  A pair of front and rear positioning holes 209 and 210 are formed in the lower main surface of each cartridge 205 and 216. The front positioning hole 209 is located in the vicinity of the edge of the main surface portion on the front side of the optical pickup opening 222, and is formed in an oval shape whose major axis direction is the front-rear direction. The rear positioning hole 210 is located in the vicinity of the edge of the main surface portion on the rear side of the optical pickup opening 222 and is formed in a circular shape.

  A plurality of identification holes 224 are formed in the vicinity of the edge on the other side of the rear side of the lower main surface of each cartridge 205, 216. These identification holes 224 are for identifying the type and state of the disks stored in the cartridges 205 and 216, for example, whether or not information signals can be recorded. In the cartridge 205 of the recording / reproducing disc cartridge 220, a save notch 214 is provided on the rear side surface corresponding to the identification hole 224. When the save notch 214 is moved, the save notch 214 moves back and forth inside one of the identification holes 224 and changes the depth of the identification hole 224 to switch the identification state of whether or not the information signal can be recorded. Furthermore, an engaged recess 212 is formed at the edge on the other front side of the lower main surface portion of each of the cartridges 205 and 216.

  In the cartridge 205 of the recording / reproducing disk cartridge 220, a magneto-optical disk identification recess 211 is formed at the front edge of the lower main surface. The cartridge 216 of the read-only disk cartridge 221 has an optical disk disc identification recess 218 formed at the front edge of the lower main surface portion. The magneto-optical disc identifying recess 211 and the optical disc identifying recess 218 have different depths from the lower main surface portion. Depending on the depth difference, the stored disc is a magneto-optical disc or an optical disc. It is displayed.

  The disc player to which the present invention is applied has a chassis 18 having a size corresponding to the size of each disc cartridge 220, 221 as shown in FIG.

  The disk cartridges 220 and 221 are positioned and mounted on the chassis 18. That is, the chassis 18 has a pair of front and rear positioning pins on the upper surface portion, and the disk cartridges 220 and 221 are positioned by fitting these positioning pins in correspondence with the positioning holes 209 and 210, respectively.

  The disk cartridges 220 and 221 are mounted on the chassis 18 by inserting the disk cartridges 220 and 221 into a cartridge holder (not shown) disposed on the upper side of the chassis 18 so as to be able to contact with and separate from the chassis 18. Is done. That is, the disk cartridges 220 and 221 are inserted into and held by the cartridge holder separated from the chassis 18, and the cartridge holder is brought close to the chassis 18. Mounted on the chassis 18.

  When the disk cartridges 220 and 221 are inserted into the cartridge holder, the shutter members 206 and 217 are opened.

  The disc player has a lid (not shown) that can be opened and closed above the cartridge holder. When the lid is closed, the cartridge holder is brought close to the chassis 18, and the disk cartridges 220 and 221 held by the cartridge holder are mounted on the chassis 18. This lid is locked in the closed state, and unlocked by an eject operation described later.

  Further, when the lid is opened, the cartridge holder is separated from the chassis 18, and the disk cartridges 220 and 221 held by the cartridge holder are separated from the chassis 18.

  A disk table 10 for rotating the recording disk is disposed at the center of the chassis 18. As shown in FIG. 1, the disk table 10 is attached to a spindle shaft 2 that is a drive shaft of a spindle motor 1 attached to a chassis 18. The disc table 10 is formed in a disk shape, and a fitting hole 11 for fitting the spindle shaft 2 in the center is provided. The disk table 10 is attached to the spindle shaft 2 by fitting the spindle shaft 2 into the fitting hole 11. Therefore, the disk table 10 is rotated together with the spindle shaft 2 when the spindle shaft 2 is driven to rotate.

  The disk table 10 is provided with a positioning protrusion 12 that fits in a positioning hole 204 provided in the recording disk 201 on the upper surface portion on which the recording disk is placed. The positioning protrusion 12 is formed in a truncated cone shape and is formed so as to fit smoothly into the positioning hole 204. The positioning projection 12 is formed so that the center axis coincides with the fitting hole 11 into which the spindle shaft 2 is fitted.

  Moreover, as shown in FIG.2 and FIG.3, the elastic displacement part 17 is provided in the positioning protrusion part 12 in the outer periphery part. The elastic displacement portion 17 is disposed so as to protrude toward the outer side of the positioning projection portion 12, and appears and disappears with respect to the outer peripheral surface of the positioning projection portion 12 by being elastically displaced. That is, when the positioning projection 12 is inserted into the positioning hole 204 of the recording disk 201, the elastic displacement portion 17 elastically presses the inner periphery of the positioning hole 204 to hold the recording disk 201 on the disk table.

  A magnet mounting recess 14 in which an annular magnet 13 is disposed is formed on the upper surface of the positioning protrusion 12. The magnet mounting recess 14 is formed in an annular shape corresponding to the shape of the magnet 13.

  The outer peripheral side of the positioning projection 12 is formed in a flange-like manner, and serves as a disk mounting portion 15 around which the positioning hole 204 of the recording disk 201 is mounted.

  A gear portion 16 is formed on the outer peripheral edge of the disc table 10. The gear portion 16 is formed coaxially with the positioning projection portion 12.

  When the disk cartridges 220 and 221 are mounted on the chassis 18, the recording disk 201 accommodated in the disk cartridges 220 and 221 is placed in the positioning hole 204 through the chucking opening 213 as shown in FIG. The positioning protrusion 12 is fitted to the disk table 10 and is positioned and held on the disk table 10 in a state where the periphery of the positioning hole 204 is mounted on the disk mounting part 15. At this time, the magnet 13 attracts the chucking plate 202 in the direction of arrow A in FIG. 1 and holds the recording disk 201 on the disk table 10.

  The spindle motor 1 has an outer cylinder portion 8, and the outer cylinder portion 8 is fixedly attached to a chassis 18 with fixing screws 9. The spindle motor 1 is attached to the chassis 18 so that the spindle shaft 2 is erected vertically with respect to the chassis 18.

  In this spindle motor 1, the spindle shaft 2 is disposed in the outer cylinder portion 8 and is rotatably supported by a support member 4 attached to the outer cylinder portion 8 via rotary bearings (bearings) 3 and 3. Has been. In the spindle motor 1, a pair of disk-like yoke members 5 and 5 each having an annular multi-pole magnet 6 attached thereto are attached to the spindle shaft 2. These yoke members 5 and 5 make the multi-pole magnets 6 and 6 face each other. Between these multi-pole magnets 6 and 6, a printed circuit board 7 to which a drive coil is attached is disposed. The printed circuit board 7 is supported by the outer cylinder portion 8 and extends to the connection terminal portion 22 located on the outer side of the outer cylinder portion 8.

  The spindle motor 1 selects the spindle shaft 2 in either the forward rotation direction or the reverse rotation direction by supplying a drive current to the drive coil mounted on the printed circuit board 7 via the connection terminal portion 22. Can be rotated manually.

  In this disc player device, an optical pickup device 19 is disposed on the chassis 18. The optical pickup device 19 has an optical block unit, and in this optical block unit, a light source such as a laser diode, various optical devices that guide a light beam emitted from this light source, an objective lens that collects and emits the light beam, and A photodetector for detecting a reflected light beam of the light beam emitted from the objective lens is incorporated.

  The optical pickup device 19 performs writing or reading of information signals on the recording disk 201 by irradiating the signal recording surface of the recording disk 201 with a light beam emitted from the objective lens.

  The optical pickup device 19 is disposed on the chassis 18 so as to be movable in the direction of arrow T in FIG. The optical pickup device 19 is fed by a drive force of a pickup feed motor 20 disposed on the chassis 18 via a screw shaft 21 serving as a drive force transmission member.

  When the optical pickup device 19 is fed on the chassis 18, an information signal is sent to the signal recording area of the recording disk 201 held on the disk table and rotated by the optical pickup opening 222. Is written or read.

  The optical pickup device 19 is provided with a magnetic head device (not shown) facing the objective lens. When the disk cartridges 220 and 221 are mounted on the chassis 18, the recording disk 201 is positioned between the objective lens and the magnetic head device. This magnetic head device faces the recording disk 201 through the magnetic head opening 223.

  As shown in FIGS. 3 to 5, the disc player according to the present invention releases the lock in the closed state of the lid and removes the recording disc 201 held on the disc table from the disc table 10. An eject mechanism is provided to enable the above.

  Further, as shown in FIGS. 3 to 5, the disc player is provided with a driving force transmission mechanism that transmits the rotational force of the disc table 10 to the ejection control mechanism that controls the ejection operation of the ejection mechanism via the gear portion 16. It has been.

  The eject mechanism is operated by an eject operation mechanism. This eject operation mechanism includes a first eject slider 43 that constitutes a first eject operation member that is slidably supported by the chassis 18 and a second eject slider 44 that constitutes a second eject operation member. These eject sliders 43 and 44 are supported so as to be slidable along the outer surface of the housing of the disc player.

  The first eject slider 43 is provided with an eject knob 42 for manually sliding operation. When the eject knob 42 is operated and the first eject slider 43 is slid in one direction of the arrow K in FIG. 3, the first eject slider 43 is moved through the eject mediating lever 40 to the second eject slider. 44 is slid in the direction of arrow L in FIG.

  That is, the first eject slider 43 presses the eject mediating piece 41 of the eject mediating lever 40 to move the eject mediating lever 40, and presses and moves the second ejecting slider 44 via the eject mediating piece 41. To do. The first eject slider 43 cannot be slid to a position where the second eject slider 44 is directly pressed, and the second eject slider 44 can be slid by interposing the eject mediating piece 41.

  When the second eject slider 44 is slid through the eject mediating piece 41, the second eject slider 44 releases the lock for maintaining the lid in the closed state, and the cartridge holder is separated from the chassis 18 so that the recording disc 201 is moved to the disc table. Eject operation that allows more separation is made possible.

  The eject mediating lever 40 is movably disposed on an eject prohibiting lever 33 disposed on the chassis 18, and the eject mediating piece 41 is protruded outward of the housing to make the first and second ejects. Advancing and retreating between the sliders 43 and 44. The ejection mediating lever 40 and the ejection prohibiting lever 33 constitute an ejection control mechanism that controls the ejection operation of the ejection mechanism.

  As shown in FIGS. 3, 4, and 5, the ejection mediating lever 40 has a vertical portion 40a extending on the ejection prohibiting lever 33 and an extending portion 40b extending perpendicularly to the vertical portion 40a. And it is formed in a substantially L shape as a whole. An ejection mediating piece 41 projects from the front end side of the vertical portion 40a. The ejection mediating lever 40 is provided on the ejection prohibiting lever 33 with a support hole 39 provided in the vertical portion 40a. The support shaft 39 inserted on the ejection prohibiting lever 33 is inserted into the support hole 39. Yes. The eject mediating lever 40 includes a spring latching portion 49, and an eject mediating piece 41 is formed by a tension coil spring 47 stretched between the spring latching portion 49 and the spring latching portion 48 of the ejection prohibiting lever 33. Is biased in the direction of arrow J in FIG.

  The eject mediating lever 40 is urged in the direction of arrow J in FIG. 3 by the tension coil spring 47 and is positioned so that it can move integrally with the eject inhibiting lever 33.

  The ejection prohibiting lever 33 has support slits 36 and 37, and the support shafts 36 and 37 provided on the chassis 18 are inserted into the support slits 36 and 37 so as to be slidably supported on the chassis 18. ing. As shown in FIG. 3, the ejection prohibiting lever 33 includes an ejection permission position which is a first position where the ejection mediating piece 41 enters between the ejection sliders 43 and 44, and an ejection mediation as shown in FIG. The piece 41 can be slid over an ejection prohibiting position, which is a second position for retracting the piece 41 from between the ejection sliders 43 and 44.

  As shown in FIGS. 3, 4, and 5, a toggle spring latching portion 46 is provided at the distal end portion of the extension portion 40 b of the eject mediating lever 40. One arm portion of a toggle spring 45 that is a two-way biasing spring is hooked to the toggle spring hooking portion 46. The other arm portion of the toggle spring 45 is hooked on a hooking portion on the chassis 18.

  The toggle spring 45 has an elastic force in the direction of widening the interval between the arms, and is interposed between the toggle spring latching portion 46 provided on the ejection mediating lever 40 and the latching portion of the chassis 18.

  The interval between the toggle spring latching portion 46 of the eject mediating lever 40 and the latching portion of the chassis 18 is such that the ejection prohibiting lever 33 is the first position and the ejection prohibiting position is the second position. When it is in the middle position which is the middle, it is made the narrowest. That is, when the ejection prohibiting lever 33 is in the ejection permitting position or the ejection prohibiting position, the interval between the toggle spring latching portion 46 of the ejection prohibiting lever 33 and the latching portion of the chassis 18 is determined by the ejection prohibiting lever 33. Wider than when in the middle position.

  Therefore, the toggle spring 45 moves and urges the eject prohibiting lever 33 to the eject permitting position side in the direction of arrow H in FIG. 3 when the eject prohibiting lever 33 is closer to the eject permitting position than the intermediate position. When located at the ejection prohibition position side of the intermediate position, the ejection prohibition lever 33 is moved and urged toward the ejection prohibition position side in the direction of arrow G in FIG.

  In this disc player, when the information signal is written to or read from the recording disc, the ejection prohibiting lever 33 is ejected to the second position by a driving force transmission mechanism, which will be described later, as shown in FIG. Has been slid into position. At this time, even if the first eject slider 43 is slid to the second eject slider 44 in the direction of arrow K in FIG. 5, the second eject slider 44 cannot be slid and the eject operation is executed. Can not do it.

  In this disc player, when an information signal is not written to or read from the recording disc, the eject prohibiting lever 33 is slid to an eject permitting position by a driving force transmission mechanism, which will be described later, as shown in FIG. The At this time, when the first eject slider 43 is slid to the second eject slider 44 in the direction of arrow K in FIG. 3, the second eject slider 44 is moved through the eject mediating piece 41 in FIG. Slide in the direction of the arrow L to enable the eject operation.

  The driving force transmission mechanism has a gear train that transmits the rotational force of the disk table 10 to the ejection prohibiting lever 33.

  That is, the driving force transmission mechanism includes a first transmission gear 23 that is rotatably supported on the chassis 18 and meshes with the gear portion 16 of the disk table 10. A second transmission gear 24 having a smaller diameter than the first transmission gear 23 is integrally and coaxially attached to the first transmission gear 23. The second transmission gear 24 meshes with a third transmission gear 25 that is rotatably supported on the chassis 18. A fourth transmission gear 26 having a smaller diameter than the third transmission gear 25 is integrally and coaxially attached to the third transmission gear 25. The fourth transmission gear 26 meshes with a fifth transmission gear 27 that is rotatably supported on the chassis 18. A sixth transmission gear 28 having a smaller diameter than that of the fifth transmission gear 27 is integrally and coaxially attached to the fifth transmission gear 27.

  A rotation lever 29 is rotatably attached to the fifth transmission gear 27 via a friction member. The rotation lever 29 is supported at the base end side so as to be rotatable around the support shaft of the fifth transmission gear 27. That is, the rotation lever 29 is rotated by receiving a driving force from the fifth transmission gear 27 via the friction member in a direction following the rotation direction of the fifth transmission gear 27.

  A seventh transmission gear 31 is rotatably attached to the distal end side of the rotation lever 29. The seventh transmission gear 31 meshes with the sixth transmission gear 28.

  The seventh transmission gear 31 meshes with a rack gear 32 provided on the ejection prohibiting lever 33. The rack gear 32 is formed along the slidable direction of the ejection prohibiting lever 33.

  The ejection prohibiting lever 33 is slidable within a range of, for example, ± 2 mm, with the intermediate position as 0 point across the ejection permitting position and the ejection prohibiting position. The slidable distance of the ejection prohibiting lever 33 is X (mm) (that is, ± (X / 2) (mm)), the length of the rack gear 32 is L (mm), and the rotation lever 29 is rotated. 7> P> (L−X) ≧ 0 is established, where P (mm) is the moving distance of the transmission gear 31 of FIG.

  Then, as shown in FIG. 3, the seventh transmission gear 31 is located on the side of the ejection prohibition position with respect to the rack gear 32 when the ejection prohibition lever 33 is at the ejection permission position. As shown in FIG. 5, when the ejection prohibiting lever 33 is in the ejection prohibiting position, the ejecting prohibiting lever 33 is movable toward the ejection permitting position side of the rack gear 32 and the position where it does not mesh with the rack gear 32.

  As shown in FIGS. 3 and 4, the seventh transmission gear 31 allows the disk table to record or reproduce information signals with respect to the recording disk 201 by the spindle motor 1 when the ejection prohibiting lever 33 is in the ejection permission position. 4 is rotated in the forward rotation direction indicated by arrow D in FIG. 4, the sixth transmission gear 28 is rotated in the reverse rotation direction indicated by arrow E in FIG. It moves to the ejection permission position side while meshing, and then is further rotated in the direction indicated by arrow F in FIG. 5 to move the ejection inhibition lever 33 to the ejection inhibition position side. At this time, the ejection prohibiting lever 33 is moved to the ejection prohibiting position side beyond the intermediate position, so that the urging force of the toggle spring 45 is slid to the ejection prohibiting position side in the direction indicated by the arrow G in FIG. The

  That is, as shown in FIG. 5, the ejection control mechanism prohibits the ejection operation of the recording disk by the ejection mechanism when the disk table 10 is rotated in the forward rotation direction.

  As shown in FIG. 5, the seventh transmission gear 31 has an arrow in FIG. 3 in which the disk table 10 is reverse to the forward rotation direction by the spindle motor 1 when the ejection prohibiting lever 33 is in the ejection prohibiting position. When rotated in the reverse rotation direction indicated by B, the sixth transmission gear 28 is rotated in the normal rotation direction indicated by the arrow C in FIG. 3 to move to the ejection prohibition position side while meshing with the rack gear 32, Next, the ejection prohibiting lever 33 is moved to the ejection permission position side. At this time, the ejection prohibiting lever 33 is slid to the ejection allowing position as indicated by an arrow H in FIG. The

  That is, as shown in FIG. 3, this eject mechanism enables an eject operation when the disk table 10 is rotated in the reverse rotation direction indicated by the arrow B in FIG.

It is a longitudinal cross-sectional view which shows the disk table used for this invention. FIG. 3 is a plan view illustrating a configuration of a main part of a disc player to which the ejection mechanism according to the present invention is applied. FIG. 3 is a plan view of a principal part showing a part of a state where the disc player is in a stop mode. FIG. 3 is a plan view of a principal part showing a part of a state in which the disc player is in a recording mode start state. FIG. 5 is a plan view of a principal part showing a part of a state in which the disc player is in a recording mode. FIG. 3 is a perspective view of a recording / reproducing disk cartridge used in a disk player as viewed from the upper surface side. FIG. 2 is a perspective view of a recording / reproducing disk cartridge as viewed from the bottom side. FIG. 3 is a perspective view of a read-only disc cartridge used in a disc player as viewed from the upper surface side. FIG. 3 is a perspective view of a read-only disk cartridge as viewed from the bottom side. It is a top view which shows the principal part structure of the conventional disc player.

Explanation of symbols

  2 spindle shaft, 10 disc table, 16 gear section, 33 eject prohibiting lever, 40 eject mediating lever, 41 eject mediating piece, 43 first eject slider, 44 second eject slider, 45 toggle spring

Claims (4)

An outer housing with a lid,
Locking means for maintaining the lid in a closed state;
A spindle motor;
A drive shaft that is rotationally driven by the spindle motor;
A disc table that is fitted and fitted to the drive shaft with a fitting hole provided in the center, and is rotated by the spindle motor;
A first lever that is moved between a first position and a second position in conjunction with the rotation of the disk table;
When operated when the first lever is located at the first position, the locking means is unlocked by engaging with the first lever, and the first lever is moved to the first position. A disc recording and / or reproducing apparatus, comprising: an operating means which is disengaged from the first lever when operated at the second position.   In the disc recording and / or reproducing apparatus, the second lever coupled to the first lever, the first lever, and the second lever can be moved integrally, and the first lever 2. A disk recording and / or reproducing apparatus according to claim 1, further comprising an urging member for pivotally connecting said lever to said second lever. The disc recording and / or reproducing apparatus may further include the first recording medium so that the first lever is biased in the first position direction when the first lever is in the first position. A bi-directional biasing spring for biasing the first lever so that the first lever is biased in the second position direction when the lever is in the second position ; The disk recording and / or reproducing apparatus according to claim 1. The operating means includes a first operating member and a second operating member,
When the first lever is in the first position, the tip of the first lever is interposed between the first operating member and the second operating member, and the first operating member is operated by the first operating member. As a result, the first operating member engages with the tip of the first lever, and the first lever rotates to move the second operating member, so that the locking means 2. The disk recording and / or reproducing apparatus according to claim 1 , wherein the disk is unlocked.

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