JP3989185B2 - Drive device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drive device that drives a disk loading mechanism and a pickup moving mechanism by a single drive source.
[0002]
[Prior art]
Conventionally, for example, in a disc player such as a compact disc for music playback, a disc loading mechanism and a pickup moving mechanism are selectively driven by a single driving source as described in Japanese Patent Application Laid-Open No. 11-195262. There is known a driving force selection mechanism that reduces the number of driving sources.
[0003]
This disc player has an idler plate that can rotate about the axis of a drive gear that rotates by a drive force from a drive source as a drive force selection mechanism, and an idler gear and a drive gear provided on the idler plate, Depending on the direction of rotation of the drive gear, the idler plate rotates to the disk loading position where the driving force is transmitted to the disk loading mechanism or the pickup moving position where the driving force is transmitted to the pickup moving mechanism. Is transmitted to either the disk loading mechanism or the pickup moving mechanism.
[0004]
[Problems to be solved by the invention]
However, in the configuration of the conventional disc player, a neutral point of driving force transmission in which the driving force of the driving gear is not transmitted from the idler gear to any of the disc loading mechanism and the pickup moving mechanism occurs during the rotation of the idler plate, and the operation is performed. There is a problem that becomes unstable.
[0005]
In order to freely operate the disk loading mechanism or the pickup moving mechanism at each position where the idler plate is rotated to the disk loading position or the pickup moving position, that is, to rotate the motor forward and backward, It is necessary to separately use locking means for locking the position, and there is a problem that the structure becomes complicated and large.
[0006]
The present invention has been made in view of the above points, and provides a drive device capable of reliably transmitting and switching drive force from a single drive source to a disk loading mechanism and a pickup moving mechanism. Objective.
[0007]
[Means for Solving the Problems]
The drive device according to claim 1 has a drive gear that is rotationally driven by a drive source, and a loading transmission gear that is always meshed with the drive gear, and a driving force is transmitted from the loading transmission gear to load and eject the disc. A disc loading mechanism that has a pickup transmission gear, a pickup moving mechanism that moves the pickup by transmitting a driving force to the pickup transmission gear, and a gear that is always meshed with the drive gear and that is in contact with and away from the pickup transmission gear. An idler gear that meshes with each other, and is moved between a first position that is positioned when the disk is ejected and a second position that is positioned when the disk is loaded, and the idler gear is moved to the second position by moving to the second position. Is engaged with the pickup transmission gear and the second By the movement of the put et those that comprise a slider of separating the idler gear from the pick-up transmission gear.
[0008]
For the disk loading mechanism, the driving force is constantly transmitted by the loading transmission gear that is always meshed with the driving gear that is rotationally driven by a single driving source, while for the pickup moving mechanism, the driving gear is transmitted to the driving gear. The idler gear that is always meshed can be brought into and out of contact with the pickup transmission gear of the pickup moving mechanism, and the idler gear is brought into contact with and separated from the pickup transmission gear by a slider that moves in accordance with the loading and ejection of the disk. Further, there is no neutral point for driving force transmission with respect to the pickup moving mechanism, the operation is stable, and transmission and switching of driving force from a single driving source are ensured.
[0009]
The drive device according to claim 2 is the drive device according to claim 1, wherein the slider is provided with a rack that can be engaged with the drive gear, and the drive gear is provided in the rack at the first position and the second position. Are provided with slider engagement means for engaging the rack of the slider with the drive gear when the disk is loaded and ejected.
[0010]
The slider is provided with a rack that can be engaged with the drive gear, and the rack is provided with a toothless portion that releases the engagement with the drive gear at the first position and the second position of the slider. Even if is rotating, there is no need for a regulating means for keeping the slider in the first position or the second position and regulating the movement of the idler gear, and the structure can be simplified and miniaturized. In addition, when the disk is loaded and ejected, the slider rack is engaged with the drive gear by the slider engagement means, and the slider can be moved.
[0011]
According to a third aspect of the present invention, in the driving device according to the first or second aspect, the disk loading mechanism is released from the loading operation by the movement of the slider to the second position, and from the second position of the slider. Can be switched to the loading operation state by the movement of.
[0012]
Then, the loading operation is canceled by the movement of the slider to the second position, and the driving force is constantly transmitted to the disk loading mechanism by switching to the loading operation state by the movement of the slider from the second position. However, switching of the loading operation is ensured.
[0013]
The drive device according to claim 4 is the drive device according to any one of claims 1 to 3, wherein the pickup moving mechanism is configured to transmit the driving force from the idler gear to the pickup transmission gear when the slider moves from the second position during ejection. Until the release is released, transmission release means is provided that does not transmit the driving force transmitted to the pickup transmission gear to the movement of the pickup.
[0014]
The drive force transmitted to the pickup transmission gear by the transmission release means of the pickup movement mechanism until the slider moves from the second position during ejection and the transmission of the drive force from the idler gear to the pickup transmission gear is released. Is not transmitted to the pickup movement, and the eject operation is allowed.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0016]
As a disk handled by a disk player to which the drive device of the present embodiment is applied, for example, a compact disk for music reproduction and an album type 12 cm disk will be described as an example.
[0017]
FIG. 1 shows a state in which a disc D is inserted into a disc player to which a drive device is applied, where (a) is a plan view and (b) is a side view. Reference numeral 11 denotes a chassis. An insertion slot 12 for inserting and removing the disk D is formed in the front surface of the chassis 11, and a reproduction position 13 for reproducing the disk D is formed in the chassis 11 behind the insertion slot 12. Hereinafter, in FIG. 1 (a), the insertion port 12 side of the chassis 11 will be described as the front surface, the opposite side of the insertion port 12 as the rear surface, one side intersecting the insertion port 12 as the left side surface, and the other side as the right side surface. .
[0018]
Inside the chassis 11, a pick base 22 is supported by a plurality of dampers 21. The pick base 22 includes a driving unit 23 for applying a driving force, a disk loading mechanism 24 for loading and ejecting the disk D, a spindle motor 25 for rotationally driving a turntable (not shown), and a reproduction position 13 between the turntable and the pick base 22. A chuck mechanism (not shown) for chucking the loaded disk D, a pickup 26 for reading information recorded on the disk D, a pickup moving mechanism 27 for moving the pickup 26 in the radial direction of the disk D, and according to loading and ejection of the disk D A slider 28 for switching various operations is provided.
[0019]
The drive unit 23 is disposed on the rear side of the pick base 22, has a motor 31 as a drive source, a worm gear 32 is attached to the drive shaft of the motor 31, and the drive gear 33 is engaged with the worm gear 32. Yes.
[0020]
A swing plate 34 is swingably provided around the axis of the drive gear 33, and an idler gear 35 that always meshes with the drive gear 33 is rotatably supported by the swing plate 34.
[0021]
The disk loading mechanism 24 includes a loading transmission gear 41 that is also used as a driving gear that is always meshed with the driving gear 33, a loading transmission gear 42 that meshes with the loading transmission gear 41, a worm gear 43 that meshes with the loading transmission gear 42, and a pick base. Drive shaft 44 disposed along the left side of 22 and having worm gear 43 attached to the rear end thereof, worm gear 45 attached to the front end of drive shaft 44, gear 46 meshing with worm gear 45, and meshing with gear 46 An end gear 47 is provided, and when the motor 23 is driven, the driving force is always transmitted to the end gear 47 and rotated.
[0022]
A loading roller 48 that faces the upper and lower sides of the insertion slot 12 and moves the disk D between the guide plate (not shown) and the guide plate is disposed. The loading roller 48 is fitted around the roller shaft 49, and both ends of the roller shaft 49 are rotatably supported by the roller support lever 50, and a gear that meshes with the end gear 47 at one end of the roller shaft 49. 51 is installed. The roller support lever 50 is swingably supported on both sides of the pick base 22 with a support shaft 52 as a fulcrum. Depending on the position of the slider 28, the loading roller 48 sandwiches the disk D between the guide plate. At the same time, the loading operation position where the gear 51 meshes with the end gear 47 to move the disk, the loading roller 48 moves away from the guide plate and the disk D, and the gear 51 moves away from the end gear 47 to reproduce the disk D. It is moved to an allowable loading operation release position.
[0023]
Further, the pickup 26 is moved by the pickup moving mechanism 27 through the opening 22a provided in the pick base 22 to face the disk surface on which information on the disk D is recorded, and moves from the inner diameter side to the outer diameter side of the disk D. The information recorded on the rotating disk D is read.
[0024]
Further, the pickup moving mechanism 27 has a pickup moving table 61 on which the pickup 26 is mounted, and this pickup moving table 61 is formed on the other side with the feed shaft 62 disposed on one side of the opening 22a of the pick base 22. It is supported so as to be movable in the radial direction of the disk D along the guide edge portion 63 formed.
[0025]
A pickup transmission gear 64 is rotatably disposed adjacent to the drive gear 33, an intermediate gear 65 is engaged with the pickup transmission gear 64, and a worm gear 66 attached to the feed shaft 62 is engaged with the intermediate gear 65. Yes. The idler gear 35 is engaged with the pickup transmission gear 64 so as to be able to contact and separate.
[0026]
Both ends of the feed shaft 62 are rotatably supported by the pick base 22, and as shown in FIG. 5, a worm gear 66 is attached to one end corresponding to the moving direction in the inner circumferential direction of the pickup moving base 61, A spiral threaded portion 67 is formed on the other end side corresponding to the moving direction of the moving base 61 in the outer peripheral direction, and a small diameter portion 68 is formed on one end side of the threaded portion 67.
[0027]
A pick guide 69 is provided on the pick-up moving table 61 so as to face the feed shaft 62. The pick guide 69 is formed with a first tooth portion 70 to be engaged with the screw portion 67 of the feed shaft 62, and A leaf spring 72 provided with a second tooth portion 71 meshed with the threaded portion 67 of the feed shaft 62 is attached.
[0028]
Then, by the rotation of the feed shaft 62, the pick-up moving table 61 is moved in the inner circumferential direction or the outer circumferential direction by the meshing of the thread portion 67 with the first tooth portion 70 and the second tooth portion 71. When the pickup moving table 61 is moved to the innermost circumferential position, the movement of the pickup moving table 61 is restricted at the innermost circumferential position, and the first tooth portion 70 enters the small diameter portion 68 and meshes. At the same time, the second tooth portion 71 skips teeth due to the elasticity of the leaf spring 72 and the driving force transmission is released. With these configurations, the driving force transmitted to the pickup transmission gear 64 can be transmitted to the pickup 26. A transmission canceling means 73 that does not transmit the movement is configured.
[0029]
As shown in FIGS. 1 and 4, the slider 28 is attached to the pick base 22 so as to be movable in the front-rear direction, and the most advanced position is the first position (position shown in FIG. 1). The most backward position is the second position (position shown in FIG. 3). The first position is an ejection completion position or a loading standby position, and the second position is a disk reproduction position, a loading completion position, or an ejection start position.
[0030]
On the rear end side of the slider 28, a cam groove 81 through which the shaft of the drive gear 33 and the shaft of the idler gear 35 are inserted is formed along the front-rear direction, and a guide groove 82 through which the shaft of the loading transmission gear 41 is inserted. Are formed in the front-rear direction. The cam groove 81 is substantially parallel to the front-rear direction except for the front end side, and the front end side is inclined rightward. The cam groove 81 moves the slider 28 from the first front position to the second rear position. The idler gear 35 is kept away from the pickup transmission gear 64 in the region immediately before reaching, and the idler gear 35 is engaged with the pickup transmission gear 64 by further movement of the slider 28 to the second position behind.
[0031]
A rack 83 that faces one side of the guide groove 82 and that can be engaged with the pinion 41a of the loading transmission gear 41 that also serves as a drive gear is formed along the front-rear direction. In the first position and the second position at the rear, there are provided missing tooth portions 84 and 85 that are disengaged from the pinion 41a.
[0032]
There is provided slider engagement means 86 for engaging the rack 83 of the slider 28 with the pinion 41a during loading and ejection of the disk D. The slider engagement means 86 has an operation plate 87 that is slidably mounted on the slider 28 in a predetermined range in the front-rear direction. The operating plate 87 is formed with a rack 88 that has the same shape as the rack 83 of the slider 28 and can be engaged with the pinion 41a. The cover plate 90 is mounted on the spring mounting portion 89 of the operating plate 87 and the pick base 22. (Shown in FIG. 6) is connected to a reversing spring 91, and by this reversing spring 91, the slider 28 is urged forward when it is positioned at the front first position, and is moved to the rear second position. When it is positioned, it is urged backward, and the urging direction is reversed between the first position in front of the slider 28 and the second position in the rear. At the first position in front of the slider 28 and the second position in the rear, the rack 88 of the working plate 87 biased by the reversing spring 91 is separated from the pinion 41a and meshes like the rack 83 of the slider 28. It has not been.
[0033]
In a state where the slider 28 is positioned at the first front position and the operating plate 87 is biased forward by the reversing spring 91, the disk D loaded at the reproduction position 13 contacts and operates. The actuating plate 87 is moved rearward against the bias of the reversing spring 91 by the trigger mechanism, and the rack 88 is engaged with the pinion 41a, and the slider 28 is positioned at the second rear position so that the operating plate 87 is engaged. 6 is urged rearward by the reversing spring 91, the ejecting trigger mechanism 92 shown in FIG. 6 moves the operating plate 87 forward against the urging of the reversing spring 91 in accordance with the ejecting operation. A rack 88 is engaged with the pinion 41a.
[0034]
As shown in FIG. 6, the trigger mechanism 92 on the eject side includes trigger levers 95 and 96 that can swing with respect to the cover plate 90 about the support shafts 93 and 94, respectively. One end is arranged so as to be able to contact the pick guide 69 and a spring 97 is mounted, and the other trigger plate 96 is stretched between the cover plate 90 and a spring 98 which is urged to rotate clockwise in FIG. And a pin 99 that abuts against one end of the spring 97 of one trigger lever 95. When the pickup moving table 61 reaches the innermost peripheral position (state shown in FIG. 6), the trigger lever 95 is rotated clockwise by the pick guide 69, and the pin 99 is pushed by the spring 97 of the trigger lever 95. The trigger lever 96 is rotated counterclockwise, and the counter lever 91 is rotated counterclockwise to move the operating plate 87 forward against the bias of the reversing spring 91. 88 meshes with the pinion 41a.
[0035]
A switch 101 is provided that engages and turns on the pick guide 69 when the pickup moving base 61 reaches the innermost circumference.
[0036]
Next, the operation of the disc player will be described.
[0037]
First, the operation from loading to reproduction of the disk D will be described.
[0038]
FIG. 1 shows an initial state before inserting the disk D, that is, an ejected state.
[0039]
When the disk D is inserted into the insertion slot 12, the disk detection is detected by a disk detection element (not shown), and the motor 31 is rotationally driven in the loading direction. By driving the motor 31 in the loading direction, the drive gear 33 is rotated counterclockwise in FIG. 1, and the driving force from the drive gear 33 is loaded into the loading transmission gear 41, loading transmission gear 42, worm gear 43, drive shaft. 44, the worm gear 45, the gear 46, the end gear 47, and the gear 51 are transmitted to the loading roller 48, and the loading roller 48 is rotated in the loading direction.
[0040]
The front end of the disk D inserted into the insertion port 12 is sandwiched between a guide plate (not shown) and the loading roller 48, so that the disk D is conveyed to the reproduction position 13 by the loading roller 48.
[0041]
As shown in FIG. 2, until the disk D is transported to the reproduction position 13, only the loading mechanism 24 is operated, and the other mechanisms are kept in the initial state. That is, as shown in FIGS. 4 (a) and 7 (a), the slider 28 is positioned at the first front position, the operating plate 87 is urged forward by the reversing spring 91, and the pinion 41a is As shown in FIG. 2, the idler gear 35 is separated from the pickup transmission gear 64.
[0042]
Then, when the disk D is conveyed to the reproduction position 13, as shown in FIGS. 4B, 4C and 7B, the operating plate 87 is moved by the trigger mechanism on the loading side (not shown). The rack 88 of the working plate 87 is moved rearward against the urging force, and is engaged with the pinion 41a rotated in the clockwise direction, and the working plate 87 is further moved backward. The slider 28 is integrally moved rearward as the operating plate 87 is pulled in conjunction with the rearward movement, the rack 83 of the slider 28 is also engaged with the pinion 41a, and the slider 28 is moved from the first front position. It is moved towards the second rear position.
[0043]
As the slider 28 moves from the first front position to the second rear position, the roller support lever 50 is rotated by a mechanism (not shown), and the loading roller 48 is separated from the disk D and the separation. At the same time, the rotation of the loading roller 48 due to the separation of the end gear 47 and the gear 51, chucking of the disk D to the turntable by the chuck mechanism, and the release of the floating lock that fixed the pick base 22 to the chassis 11 can be performed. Made.
[0044]
As shown in FIG. 3 and FIG. 7 (c), when the slider 28 moves to the second rear position, the missing tooth portion 85 of the rack 83 of the slider 28 faces the pinion 41a so that the rack 83 moves away from the pinion 41a. The slider 28 is disengaged and stopped at this second rear position. The rack 88 of the operating plate 87 is also detached from the pinion 41a, and the operating plate 87 is urged rearward by the reversing spring 91 and held.
[0045]
As shown in FIG. 3, when the slider 28 moves to the second rear position, the idler gear 35 is engaged with the pickup transmission gear 64 in the cam groove 81 of the slider 28, and the pickup transmission gear 64 is rotated.
[0046]
The driving force transmitted to the pickup transmission gear 64 is transmitted to the feed shaft 62 via the intermediate gear 65 and the worm 66, and the feed shaft 62 is rotated. Due to the rotation of the feed shaft 62, the pick-up 26 is moved in the disk outer peripheral direction by the pick-up moving table 61 due to the engagement between the threaded portion 67 of the feed shaft 62 and the second tooth portion 71 of the pick guide 69. Accordingly, the first tooth portion 70 of the pick guide 69 is engaged with the screw portion 67, and the engagement state is reliably maintained.
[0047]
Due to the movement of the pickup 26 toward the outer periphery of the disk, the switch 101 that was turned on by engaging with the pick guide 69 is turned off when the pickup 26 is in the innermost circumferential position, which is the initial position. After the spindle motor 25 is rotated and the TOC information recorded on the innermost circumference of the disk D is read, the disk D can be reproduced.
[0048]
During the reproduction of the disk D, the slider 28 is maintained at the second rear position, and the rack 83 of the slider 28 and the pinion 41a are not engaged with each other, so that the driving force of the motor 31 is transmitted only to the pickup driving mechanism 27. The The pickup 26 is moved in the radial direction by forward / reverse driving of the motor 31.
[0049]
Next, the operation from the playback of the disk D to the ejection will be described.
[0050]
At the time of ejection, the motor 31 is rotationally driven in an ejection direction opposite to the loading direction, and the drive gear 33 is rotated clockwise in FIG. With the rotation of the drive gear 33, the feed shaft 62 is rotated so that the pickup 26 moves in the inner circumferential direction, and the pickup 26 is moved to the innermost circumferential position.
[0051]
As shown in FIG. 6, when the pickup 26 reaches the innermost peripheral position, the pick guide 69 comes into contact with the trigger lever 95, and the trigger lever 95 is rotated clockwise around the support shaft 93. The trigger lever 96 whose pin 99 is pushed by the spring 97 of the trigger lever 95 is rotated counterclockwise about the support shaft 94.
[0052]
As shown in FIGS. 7D and 7E, when the trigger lever 96 is rotated counterclockwise, the operating plate 87 is moved forward against the bias of the reversing spring 91, and the rack of the operating plate 87 is 88 is engaged with the pinion 41a rotated counterclockwise, and the operation plate 87 is further moved forward. The slider 28 is also integrally moved forward as it is pulled in conjunction with the forward movement of the operating plate 87, the rack 83 of the slider 28 is also engaged with the pinion 41a, and the slider 28 is moved from the second position behind. It is moved toward the first front position.
[0053]
When the slider 28 moves forward from the second rear position, the idler gear 35 is separated from the pickup transmission gear 64 by the cam groove 81 of the slider 28, and transmission of the driving force to the pickup moving mechanism 27 is released.
[0054]
Until the transmission of the driving force to the pickup moving mechanism 27 is released, the driving force from the motor 31 continues to be transmitted to the pickup moving mechanism 27, so that the pickup 26 reaches the innermost peripheral position and is restricted from moving. Even so, the rotation of the feed shaft 62 is continued. As shown in FIG. 5, when the pickup 26 is moved to the innermost peripheral position, the first tooth portion 70 enters the small diameter portion 68 and the meshing is released. This is because the drive force transmission is released due to the jumping of the portion 71 by the elasticity of the leaf spring 72.
[0055]
Then, as shown in FIG. 2, a floating lock and chuck for fixing the pick base 22 to the chassis 11 by a mechanism (not shown) by moving the slider 28 from the second rear position to the first first position. By releasing chucking of the disk D from the turntable by the mechanism, contact of the loading roller 48 with the disk D by rotation of the roller support lever 50, and simultaneously with this contact, the engagement of the end gear 47 and the gear 51 is restored. The loading roller 48 is rotated in the ejection direction.
[0056]
As shown in FIGS. 1 and 7 (f), when the slider 28 moves to the first front position, the missing tooth portion 84 of the rack 83 of the slider 28 faces the pinion 41a so that the rack 83 moves away from the pinion 41a. The slider 28 is disengaged and stopped at this first forward position. The rack 88 of the operating plate 87 is also detached from the pinion 41a, and the operating plate 87 is urged forward and held by the reversing spring 91.
[0057]
A driving force is constantly transmitted to the end gear 47, and the disk D is moved in the ejection direction from the insertion slot 12 by the contact of the loading roller 48 with the disk D and the rotation of the loading roller 48 in the ejection direction. When the completion of ejection is detected by a disk detection element (not shown), the driving of the motor 31 is stopped.
[0058]
As described above, the driving force is constantly transmitted to the disk loading mechanism 24 by the loading transmission gear 41 that is always meshed with the driving gear 33 that is rotationally driven by the single motor 31, while the pickup moving mechanism 27 is On the other hand, the idler gear 35 that always meshes with the drive gear 33 can be brought into and out of contact with the pickup transmission gear 64 of the pickup moving mechanism 27, and the idler gear 35 is picked up by the slider 28 that moves in accordance with loading and ejection of the disk D. Since the transmission gear 64 is brought into and out of contact with the disc loading mechanism 24 and the pickup moving mechanism 27, there is no neutral point for driving force transmission, the operation is stable, and driving force transmission and switching from a single motor 31 is achieved. Can be sure.
[0059]
Further, a rack 83 is provided on the slider 28 so as to be able to mesh with a pinion 41a also used as a drive gear, and the rack 83 is meshed with the pinion 41a at a first position in front of the slider 28 and a second position at the rear. Since the toothless portions 84 and 85 for releasing the rotation are provided, the slider 28 can be maintained at the first front position or the second rear position even when the pinion 41a is rotating, and the movement of the idler gear 35 is restricted. Therefore, the structure can be simplified and miniaturized.
[0060]
In addition, when loading and ejecting the disk D, the slider engaging means 86 can engage the rack 83 of the slider 28 with the pinion 41a to move the slider 28.
[0061]
Further, in the disk loading mechanism 24, the loading operation is canceled by the movement of the slider 28 to the second rear position, and the ejecting operation state is switched by the movement of the slider 28 from the second rear position. Even if the driving force is constantly transmitted to the mechanism 24, the switching of the loading operation can be ensured.
[0062]
Further, in the pickup moving mechanism 27, during the ejection, the slider 28 moves from the second rear position until the driving force is transmitted from the idler gear 35 to the pickup transmission gear 64 and is transmitted to the pickup transmission gear 64. Since the transmission canceling means 73 that does not transmit the driving force to the movement of the pickup 26 is provided, the ejection operation can be allowed.
[0063]
In addition, the disk handled by the drive device is not limited to a music-only compact disc, but can also be applied to an optical disk such as a DVD, a magneto-optical disk such as an MD, a flexible magnetic disk, etc. It is done.
[0064]
Further, the drive device is not limited to a disc player but can be applied to a disc recording / reproducing device capable of recording on a disc, and the same effect can be obtained.
[0065]
【The invention's effect】
According to the first aspect of the present invention, the drive force is always transmitted to the disk loading mechanism by the loading transmission gear that is always meshed with the drive gear that is rotationally driven by a single drive source, while the pickup movement is performed. For the mechanism, the idler gear that is always meshed with the drive gear can be brought into and out of contact with the pickup transmission gear of the pickup moving mechanism, and the idler gear is moved relative to the pickup transmission gear by a slider that moves in accordance with the loading and ejection of the disk. Since they are brought into contact with and separated from each other, there is no neutral point for driving force transmission with respect to the disk loading mechanism and the pickup moving mechanism, the operation is stable, and transmission and switching of driving force from a single driving source can be ensured.
[0066]
According to the drive device described in claim 2, in addition to the effect of the drive device described in claim 1, the slider is provided with a rack that can be engaged with the drive gear, and the first position and the second position of the slider are provided in the rack. Since the toothless portion for releasing the engagement with the drive gear at the position is provided, the slider can be maintained at the first position or the second position even when the drive gear is rotating, and the movement of the idler gear is restricted. No restriction means is required, and the structure can be simplified and miniaturized. In addition, when the disk is loaded and ejected, the slider rack can be engaged with the drive gear by the slider engagement means, and the slider can be moved.
[0067]
According to the drive device described in claim 3, in addition to the effect of the drive device described in claim 1 or 2, in the disk loading mechanism, the loading operation is canceled by moving the slider to the second position. Since the loading operation state is switched by the movement from the second position, the switching of the loading operation can be ensured even when the driving force is constantly transmitted to the disk loading mechanism.
[0068]
According to the drive device according to claim 4, in addition to the effect of the drive device according to any one of claims 1 to 3, in the pickup movement mechanism, the slider moves from the second position at the time of ejection and the pickup transmission gear is moved from the idler gear. Until the transmission of the driving force to is released, the transmission releasing means that does not transmit the driving force transmitted to the pickup transmission gear to the movement of the pickup is provided, so that the ejection operation can be allowed.
[Brief description of the drawings]
FIG. 1 shows a state in which a disc is inserted into a disc player to which a driving apparatus according to an embodiment of the present invention is applied, wherein (a) is a plan view and (b) is a side view.
2A and 2B show a state in which the disc of the disc player is loaded at a reproduction position, where FIG. 2A is a plan view and FIG. 2B is a side view.
3A and 3B show a playback state of the disc player, wherein FIG. 3A is a plan view and FIG. 3B is a side view.
FIG. 4 is an explanatory view for explaining the operation in which the slider of the disc player is engaged with the drive gear in the order of (a) to (c).
FIG. 5 is an enlarged plan view of a pickup moving mechanism of the disc player.
FIG. 6 is a plan view of a pickup moving mechanism of the disc player.
FIG. 7 is an explanatory diagram for explaining the operation of the slider during loading of the disc player in the order (a) to (c) and for explaining the operation of the slider during ejection in the order (d) to (f).
[Explanation of symbols]
24 Disc loading mechanism
26 Pickup
27 Pickup moving mechanism
28 Slider
31 Motor as drive source
33 Drive gear
35 idler gear
41 Loading transmission gear combined with drive gear
64 Pickup transmission gear
73 Transmission release means
83 racks
84,85 tooth missing part
86 Slider engagement means
D disc

Claims (4)

A drive gear that is rotationally driven by a drive source;
A disk loading mechanism that has a loading transmission gear that is always meshed with the driving gear, and that loads and ejects the disk by the driving force transmitted from the loading transmission gear;
A pickup moving mechanism having a pickup transmission gear, and a driving force is transmitted to the pickup transmission gear to move the pickup;
An idler gear that meshes with the drive gear at all times and meshes with the pickup transmission gear so as to be able to contact and separate;
The disk is moved between a first position positioned in the ejected state of the disk and a second position positioned in the loaded state of the disk, and the idler gear is engaged with the pickup transmission gear by moving to the second position. And a slider for moving the idler gear away from the pickup transmission gear by movement from the second position. The slider is provided with a rack that can be engaged with the drive gear, and the rack is provided with a toothless portion that is disengaged with the drive gear at the first position and the second position of the slider.
2. The drive device according to claim 1, further comprising slider engagement means for engaging the rack of the slider with the drive gear when the disk is loaded and ejected. 3. The disk loading mechanism according to claim 1, wherein the loading operation is canceled by the movement of the slider to the second position and is switched to the loading operation state by the movement of the slider from the second position. Drive device. The pickup moving mechanism is used to move the pickup force transmitted to the pickup transmission gear until the slider moves from the second position during ejection and the transmission of the driving force from the idler gear to the pickup transmission gear is released. 4. The drive device according to claim 1, further comprising transmission canceling means that does not transmit.

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