JP2008130172A - Disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk device surely operating a motive force switching mechanism by a trigger member when a disk is loaded, and surely returning the motive force switching mechanism to its initial position when the disk is unloaded. <P>SOLUTION: When a small-diameter gear part 115 rotates in a γ1 direction, a second turning member 120 is turned in a ϕ1 direction, a partial gear part 120b is engaged with the small-diameter gear part 115b, and the first and second turning members 20 and 120 are integrally turned in the ϕ1 direction. When the small-diameter gear part 115b is rotated in a γ2 direction, the first and second turning members 20 and 120 are connected to each other by a connection member 126. Thus, even after the partial gear part 20d of the first turning member 20 is disengaged from the small-diameter gear part 115b, the first turning member 20 is surely returned in a ϕ2 direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a disk device in which the power of a motor is transmitted to a switching member when a disk is carried to a predetermined position, and a disk clamping operation is performed by the operation of the switching member.

  In a so-called slot-in type disk apparatus in which a large-diameter standard disk having a diameter of 12 cm or a small-diameter standard disk having a diameter of 8 cm is carried by the power of a conveyance mechanism such as a conveyance roller, as in a vehicle-mounted disk apparatus, A loading detection member is provided that is operated by being pushed by the disc when the center hole coincides with the turntable.

When the loading detection member is operated by the disk, the power switching mechanism is started by a trigger member that operates in conjunction with the loading detection member. When the power switching mechanism is started, the power of the motor is transmitted to the switching member, and a clamping operation for clamping the disk to the turntable is performed by the moving force of the switching member.
JP 2004-234854 A JP-A-8-180537

  In the conventional power switching mechanism, a drive gear that is always rotated by the power of the motor is provided, and a rotating member having a partial gear portion is provided on the side of the drive gear. When the disk is loaded and positioned at a predetermined position, the loading detection member operates to operate the trigger member. The rotating member is rotated by the trigger member, and the partial gear portion provided on the rotating member is meshed with the drive gear. Thereafter, the power of the drive gear is applied to the rotating member, and the switching member is moved and the disc is clamped by the rotating force of the rotating member.

  In this power switching mechanism, it is necessary to rotate the drive gear in the reverse direction when releasing the disc clamp. In this case, when the partial gear portion is detached from the drive gear, the rotational force does not act on the rotating member from the drive gear. For this reason, it is necessary to return the rotating member to the initial position by the force of the spring after the partial gear portion is detached from the drive gear. However, with the structure provided with this spring, it is difficult to reliably return the rotating member to the initial position after the partial gear portion is detached from the drive gear. For example, if any mechanism is to be operated during the return operation, it is necessary to increase the elastic force of the spring more than necessary. Then, when this elastic member is rotated by the trigger member and the partial gear portion is meshed with the drive gear portion, the resistance force of the spring becomes excessive, and there is a possibility that a reliable switching operation cannot be performed.

  The present invention solves the above-described conventional problems, and the power switching mechanism can be reliably operated in the first direction by the trigger member, and the switching operation of the power switching mechanism in the second direction is also low in load. It is an object of the present invention to provide a disk device that can be reliably performed.

The present invention relates to a rotation drive unit (5) in which the center hole of the disk (D) is held, a transport mechanism (6A, 6B) for conveying the disk (D) toward the rotation drive unit (5), and a disk A trigger member (101) that operates when (D) is carried to a position held by the rotation drive unit (5);
A switching member (3A, 3B) for clamping the center hole of the disk (D) to the rotation drive unit (5), and a power switching mechanism (100) for transmitting the power of the motor (M) to the switching member (3A, 3B) And is provided,
The power switching mechanism (100) includes a first moving member (20) having a first tooth portion (20d), a second moving member (120) having a second tooth portion (120b), and a motor. A drive member (115) which is operated in both forward and reverse directions with the power of (M) and has drive teeth (115b);
After the second moving member (120) is moved in the first direction (φ1) by the trigger member (101) and the second tooth portion (120b) is engaged with the driving tooth (115b), there is a delay. The first moving member (20) is moved in the first direction (φ1) and the first tooth portion (20d) is engaged with the drive teeth (115b). 20) and the second moving member (120) are connected by a connecting member (126),
When the driving member (115) is operated in the opposite direction, the first moving member (20) and the second moving member (120) are connected by the connecting member (126) and are second together. The second tooth portion (120b) is engaged with the driving tooth (115b) even after the first tooth portion (20d) is separated from the driving tooth (115b). , The first moving member (20) is moved in the second direction (φ2),
When the first moving member (20) moves in the first direction (φ1), the switching member (3A, 3B) is moved in the direction of clamping the disk, and the first moving member (20 ) Is moved in the second direction (φ2), the switching member (3A, 3B) is moved in a direction to release the disc clamp.

  In the disk device of the present invention, even when the first tooth portion (20d) of the first moving member (20) is separated from the driving tooth (115b) when the driving member (115) rotates in the reverse direction. Since the first moving member (20) and the second moving member (120) are connected to each other, the first moving member (20) is moved by applying power to the second tooth portion (120b). The motor (M) can be reliably restored in the second direction (φ2) by the power of the motor (M). Therefore, when the first moving member (20) returns to the second direction (φ2), the first moving member (20) can reliably operate the switching member and the like. Therefore, the switching operation of the power switching mechanism in the first direction and the second direction can be performed reliably without using an excessively strong spring or the like.

  In the following embodiments, the first moving member corresponds to a first rotating member, and the second moving member corresponds to a second rotating member. The other elements are made to coincide with the reference numerals given to the members of the following embodiments. That is, in the following embodiment, the first rotating member (20), the second rotating member (120), and the drive gear (115) are provided, and all the elements rotate. However, in the present invention, both the first moving member and the second moving member move linearly, and the first tooth portion and the second tooth portion are the first moving member and the second moving portion. The partial rack part provided in the moving member may be sufficient.

  Further, according to the present invention, the first moving member (20) and the second moving member (120) move in the second direction (φ2), and the second tooth portion (120b) moves to the driving tooth. (115b), the second moving member (120) is moved in the second direction (φ2) to move the second tooth portion (120b) away from the driving tooth (115b). 118) is preferably provided.

  By providing the spring (118), when the second tooth portion (120b) is separated from the driving tooth (115b), the second tooth portion (120b) is reliably located at a position away from the driving tooth (115b). You can leave.

For example, in the present invention, the connecting member (126) is movably supported by the first moving member (20), and the second moving member (120) is fitted with the connecting member (126). An engaging portion (121b) to be joined is provided, and a chassis (12) supporting the first moving member (20) and the second moving member (120) in a movable manner is provided on the connecting member ( 126) is provided to control the position of 126),
When the second moving member (120) moves in the first direction (φ1) and reaches the position where the second tooth portion (120b) meshes with the driving tooth (115b), the control portion ( 125), the connecting member (126) is hooked on the locking portion (121b) by the connecting guide portion (125a), and then the first moving member (20) is moved to the second moving member. It becomes possible to move in the first direction (φ1) together with (120).

  Further, according to the present invention, the controller (125) is formed with a restricting portion (125b) for holding the connecting member (126), and the trigger member (101) allows the second moving member (120). Is moved in the first direction (φ1), the connecting member (126) is held by the restricting portion (125b) to restrict the movement of the first moving member (20), and the second After the tooth part (120b) meshes with the drive tooth (115b), the holding of the connecting member (126) by the restricting part (125b) is released, and the first moving member (20) and the second moving member are released. Preferably, (120) can move together in the first direction (φ1).

  When the first moving member is regulated, the first moving member is not moved inadvertently when the second moving member is moved by the trigger member, and the first tooth portion is the driving tooth. The phenomenon of meshing can be prevented.

  Further, according to the present invention, the first moving member (20) and the second moving member (120) are rotating members rotating coaxially, and the intermittent member (122) is connected to the second moving member (120). Is provided so as to be swingable with a base as a fulcrum, and the connecting member (126) is supported by the intermittent member (122).

  In the disk device of the present invention, the power switching mechanism that is started by the trigger member can be reliably operated in both the forward and reverse directions. Therefore, the switching member can be reliably operated in both directions with the power of the power switching mechanism.

  FIG. 1 is a bottom view showing a mechanism unit provided in a disk device according to an embodiment of the present invention with the bottom surface facing the front side of the drawing. 2A is a left side view of the mechanism unit, and FIG. 2B is a right side view of the mechanism unit, both of which are shown with the upper surface facing upward. 3A and 3B are perspective views of the lower base of the external chassis as viewed from different directions with the upper end facing upward. 4 is a partial cross-sectional view of the engagement state between the constraining concave portion provided in the slider and the convex portion provided in the external chassis, as viewed from the same direction as FIG. 1, and FIG. 5 is a protruding lock member provided in the link mechanism. FIG. 6 is a partial perspective view of the locking portion between the lock rotation member and the lower base as viewed from the upper surface side, and FIG. It is a fragmentary perspective view which shows a part of mechanism which raises / lowers a drive base with the bottom face facing up.

  8 to 10 are plan views showing the structure of the mechanism unit as viewed from above according to the operation, FIG. 11A is a partial perspective view showing the power switching mechanism shown in FIG. (B) is an exploded perspective view of the power switching mechanism. 12 (A), 12 (B), 13 (A), 13 (B), and 14 are partial plan views showing the power switching mechanism according to the operation, as viewed from above. 15 to 17 are explanatory diagrams of the operation of the entire apparatus.

  In all drawings, the illustrated X1 direction is the right direction, the X2 direction is the left direction, the Y1 direction is the front, the Y2 direction is the rear, the Z1 direction is the upward direction, and the Z2 direction is the downward direction. FIG. 1 is a bottom view showing the Z2 direction toward the front side of the page.

(Structure of mechanism unit)
The disk device 1 can be loaded with a disk such as a DVD (digital versatile disk). The disk device 1 has an external chassis that is sufficiently thinner than the 1DIN size of in-vehicle equipment. The external chassis is composed of a lower base 7 shown in FIGS. 3A and 3B and an upper base superimposed on the lower base 7. The mechanism unit 2 shown in FIG. 1 is housed inside the lower base 7 and the upper base. On the Y1 side of the external chassis, a nose portion having a liquid crystal display panel and various switches (not shown) is provided, and a slit-like insertion port extending in the width direction (X direction) is provided in the nose portion. .

  As shown in FIG. 1, the mechanism unit 2 is provided with two transport rollers 6A and 6B as transport means, and the disk D is transported in the Y2 direction from the insertion port by the transport rollers 6A and 6B, and the Y1 direction. It is carried out to.

  A bottom chassis 12 appears on the bottom side of the mechanism unit 2 shown in FIG. 1, and a drive base 8 is provided from the center to the rear (Y2 direction) area of the bottom chassis 12. As shown in FIGS. 2A and 2B, a clamp base 9 is opposed above the drive base 8 (Z1 side). A top chassis 10 is provided in front of the clamp base 9, and both side portions of the top chassis 10 are fixed to the bottom chassis 12. The top chassis 10 and the bottom chassis 12 constitute a unit chassis of the mechanism unit 2, and the disk D inserted from the insertion slot is sent into a space between the top chassis 10 and the bottom chassis 12.

  As shown in FIG. 1, a rotational drive unit 4 is provided at the tip of the drive base 8 on the Y1 side. As shown in FIGS. 2A and 2B, in the rotation driving unit 4, the spindle motor 5 is fixed on the drive base 8, and the turntable is fixed to the rotation shaft of the spindle motor 5. . As shown in FIG. 1, the drive base 8 is provided with a head portion 17. The head unit 17 is guided by guide shafts 16 and 16 fixed to the drive base 8 so as to be movable along the recording surface of the disk placed on the turntable. The drive base 8 is provided with a thread drive mechanism for moving the head portion 17 in the radial direction of the disk.

  As shown in FIGS. 2 (A) and 2 (B), a clamper 11 is provided on the lower surface of the tip portion on the Y1 side of the clamp base 9 so as to face the turntable of the rotation drive unit 4. Is supported rotatably. As shown in FIG. 1, support bases 8c and 8c are provided on both sides in the X1 direction and the X2 direction at the base on the Y2 side of the drive base 8, and shafts 9a and 9a are provided on the support pieces 8c and 8c, respectively. It is fixed (in FIG. 1, only the shaft 9a on the X1 side is shown). The base end portion on the Y2 side of the clamp base 9 is rotatably supported by the shafts 9a and 9a.

  The shaft 9a is provided with a pressing biasing member (not shown) formed of a torsion coil spring. By the urging force of the pressing urging member, the clamp base 9 is urged to rotate about the shafts 9a and 9a, and the clamper 11 is always urged in a direction to be pressed against the turntable.

  On the other hand, the shaft pin 8a1 and the shaft pin 8a2 shown in FIG. 1 are fixed to both sides of the base end portion on the Y2 side of the drive base 8. A support piece 10a bent vertically downward (Z2 direction) is formed on the X1 side of the top chassis 10, and the shaft pin 8a1 is rotatably supported by the support piece 10a. The bottom chassis 12 is also formed with a support piece 12a bent downward, and the shaft pin 8a2 is rotatably supported by the support piece 12a.

  For this reason, the drive base 8 is rotatably supported by the unit chassis including the top chassis 10 and the bottom chassis 12 with the rear end portion thereof being the shaft pins 8a1 and 8a2 as fulcrums, and the clamp base 9 is The drive base 8 is rotatably supported at the rear.

  The drive base 8 has a drive posture parallel to the top chassis 10 and the bottom chassis 12, and a disc having an inclined posture in which the Y1 side having the rotation drive unit 4 is lowered in the Z2 direction as shown in FIGS. Rotates between standby positions. In addition, the clamp base 9 rotates between a clamp posture in which the clamper 11 is pressed against the turntable and a clamp release posture in which the clamp base 9 is inclined upward and the clamper 11 is separated from the turntable.

  As shown in FIG. 1, detection pins 26 and 26 are provided at the front end of the top chassis 10 on the Y1 side. As shown in FIG. 1, the detection pins 26, 26 are in positions close to each other and are biased in the approaching direction. When the disc is inserted in the Y2 direction from the insertion slot, the detection pins 26 and 26 are moved away from each other by the outer peripheral edge of the disc. When the detection pins 26 and 26 move away from each other, it is detected that a disc has been inserted. When the disk is ejected and the detection pins 26 and 26 return to the approaching position, it can be detected that the disk has been completely removed.

(Left-side switching member and right-side switching member and link mechanism)
As shown in FIG. 1, a left switching member 3A is provided on the left side of the top chassis 10, and a right switching member 3B is provided on the right side. As shown in FIG. 2 (A), guide long holes 41 and 42 extending in the Y1-Y2 direction are formed in the left switching member 3A. Side plates bent in the Z2 direction are provided on both sides of the top chassis 10, and support shafts 51 and 52 are fixed to the side plates. When the guide elongated holes 41 and 42 slide on the support shafts 51 and 52, the left switching member 3A is movable in the Y1-Y2 direction. As shown in FIG. 2 (B), guide long holes 43 and 44 extending linearly in the Y1-Y2 direction are also formed in the right switching member 3B. When the guide long holes 43 and 44 slide on the support shafts 53 and 54 fixed to the side plate of the top chassis 10, the right switching member 3B is movable in the Y1-Y2 direction.

  As shown in FIG. 1, a switching motor M is provided in the bottom chassis 12 at the left rear of the mechanism unit 2, and a gear group H that decelerates and transmits the power of the switching motor M is provided on the bottom surface of the bottom chassis 12. Is provided. The power of the switching motor M is given to the first rotating member 20 with the timing set by the power switching mechanism 100. The first rotating member 20 is rotatably provided on a shaft 21 fixed to the bottom surface of the left side portion of the bottom chassis 12. The first rotation member 20 is provided with a drive protrusion 20a, and the drive protrusion 20a is locked to the left switching member 3A.

  When the first rotating member 20 is rotated by the power of the switching motor M, the left switching member 3A is linearly moved in the Y1 direction and the Y2 direction by the drive protrusion 20a integrated with the first rotating member 20. Be made.

  As shown in FIG. 1, a link mechanism 30 that connects the left switching member 3 </ b> A and the right switching member 3 </ b> B is provided on the bottom surface of the bottom chassis 12. The link mechanism 30 is provided with a slider link 31. Guide long holes 31a, 31a extending in the X1-X2 direction are formed in the slider link 31, and the guide long holes 31a, 31a are inserted into guide protrusions 12b, 12b formed by bending downward from the bottom chassis 12, The slider link 31 is supported so as to be movable in the X1 direction and the X2 direction. The first rotating member 20 is provided with a connecting pin 20 b, and this connecting pin 20 b is locked in an elongated hole formed in the slider link 31.

  One end of the slider link 31 facing the X2 side is one protruding lock member 33. As shown in FIG. 1, a contact portion 33 a that is inclined toward the Y <b> 1 side is formed at the tip of the protruding lock member 33.

  A reverse link 32 is provided on the right side of the bottom surface of the bottom chassis 12. The reverse link 32 is rotatably supported on a shaft 32 a fixed to the lower surface of the bottom chassis 12. A connecting pin 32 b is fixed to the reverse link 32, and the connecting pin 32 b is hooked in an elongated hole formed in the slider link 31. A driving protrusion 32c is integrally formed on the reverse link 32, and the driving protrusion 32c is hooked to the right switching member 3B.

  In the operation state shown in FIG. 1, the first rotation member 20 is rotated counterclockwise, and the left switching member 3A is moved in the Y2 direction by the drive protrusion 20a formed integrally with the first rotation member 20. Has been moved to. At this time, the slider link 31 is moved in the X2 direction by the counterclockwise turning force of the first rotating member 20, and the reverse link 32 is rotated in the clockwise direction by the slider link 31. . Therefore, the right switching member 3B is also moved in the Y2 direction by the drive protrusion 32c of the reverse rotation link 32.

  As shown in FIG. 15, when the first rotation member 20 is rotated clockwise by the switching motor M, the left switching member 3A is moved in the Y1 direction by the drive protrusion 20a integrated with the first rotation member 20. Moved to. Further, the slider link 31 moves in the X1 direction, the reverse rotation link 32 is rotated counterclockwise, and the right switching member 3B is moved in the Y1 direction by the drive protrusion 32c provided on the reverse rotation link 32. That is, by providing the link mechanism 30, the left switching member 3A and the right switching member 3B are driven together in the same Y1 direction and the same Y2 direction in synchronization.

  As shown in FIG. 1, a shaft 35b is fixed to the lower surface of the bottom chassis 12 on the X1 side, and the rotation lock member 35 is rotatably supported by the shaft 35b. A connection pin 35 a is fixed to one arm portion of the rotation lock member 35, and the connection pin 35 a is inserted into an elongated hole formed in the reverse rotation link 32. The other arm portion of the rotation lock member 35 is a projecting lock member 35c on the X1 side, and a contact portion 35d is integrally bent at the tip thereof.

  As shown in FIG. 1, when the first rotating member 20 is rotated counterclockwise, the slider link 31 is moved in the X2 direction, and the reverse link 32 is rotated clockwise. Therefore, the rotation lock member 35 is rotated counterclockwise, and the protruding lock member 35c formed integrally with the rotation lock member 35 is further moved in the X1 direction from the X1 side portion of the mechanism unit 2. It protrudes.

  As shown in FIG. 15, when the first rotating member 20 rotates clockwise, the slider link 31 moves in the X1 direction, and the protruding locking member 33 integrated therewith retracts in the X1 direction. Further, the reverse rotation link 32 is rotated counterclockwise, whereby the rotation lock member 35 is rotated clockwise, and the protruding lock member 35c integrated with the rotation lock member 35 is retracted in the X2 direction.

  As shown in FIGS. 1 and 15 and FIGS. 7 and 17, a control plate 31b bent at a right angle from the edge on the Y2 side is provided at the center of the slider link 31. A control pin 31c protruding in the Y2 direction is provided on the control plate 31b. An elongated hole-shaped posture switching cam 8b is formed at the end of the drive base 8 on the Y1 side, and the control pin 31c is inserted into the posture switching cam 8b. As shown in FIGS. 7 and 17, the posture switching cam 8b is a lifting portion 8b1 whose end on the X1 side faces the Z2 side, and its end on the X2 side is closer to the Z1 side than the lifting portion 8b1. It is the push-down part 8b2 located.

  1 and FIG. 7, the slider link 31 is moved in the X2 direction, and the control pin 31c is also moved in the X2 direction. At this time, since the control pin 31c is positioned in the push-down portion 8b2 of the posture switching cam 8b, the drive base 8 is tilted with the tip portion having the rotation drive portion 4 pushed down with the shaft pins 8a1 and 8a2 as fulcrums. Thus, the disc standby posture (retracting posture) is obtained. As shown in FIGS. 15 and 17, when the slider link 31 moves in the X1 direction, the control pin 31c moves into the lifting portion 8b1 of the posture switching cam 8b, and the drive base 8 has a tip portion having the rotation driving portion 4. Is lifted, and the drive base 8 is in the same horizontal orientation as the bottom chassis 12 and assumes a drive posture.

  As shown in FIG. 2 (B), a clamp lifting cam 45 is integrally formed at a portion of the right switching member 3B that is closer to the Y2 side. The clamp lifting cam 45 has a lifting portion 45a on the Y1 side, and a relief space 45b is formed on the Y2 side. In the operation state of FIGS. 1 and 2B, the right switching member 3B is moved in the Y2 direction, and the control piece 9h integrated with the clamp base 9 is lifted by the lifting portion 45a of the clamp lifting cam 45. The clamper 11 is in a clamp release posture away from the turntable upward.

  That is, in the operation state shown in FIG. 1, since the slider link 31 is moved in the X2 direction, as shown in FIG. The distance between the turntable of the rotary drive unit 4 and the clamper 11 is increased by being lifted.

  As shown in FIG. 15, when the right switching member 3B moves in the Y1 direction, the control piece 9h integrated with the clamp base 9 shown in FIG. 2B is located in the escape space 45b. Is urged in the Z2 direction by the pressing urging member. At this time, as shown in FIG. 17, the drive base 8 is lifted into a drive posture, so that the center hole of the disc can be held by the turntable and the clamper 11 provided in the rotation drive unit 4.

  As shown in FIG. 2A, a pair of roller control cams 46 are formed through the portion of the left switching member 3A that is closer to the Y1 side. The roller control cam 46 is formed with a push-down portion 46a on the Y2 side and a relief space 46b on the Y1 side. The roller shaft 6A1 of the transport roller 6A and the roller shaft 6B1 of the transport roller 6B are supported so as to be movable up and down in the vertical direction (Z1-Z2 direction) on both sides of the top chassis 10, and the roller control cam 46 is further supported. Has been inserted inside. Further, the roller control cam 46 is formed on the right switching member 3A symmetrically with the left switching member 3B.

  As shown in FIG. 1 and FIG. 2A, when the left switching member 3A and the right switching member 3B are moved in the Y2 direction, the roller shaft 6A1 and the roller shaft 6B1 are respectively separated from the clearance space 46b of the roller control cam 46. The conveying roller 6A and the conveying roller 6B are pressed against the disk by an urging force such as a spring. As shown in FIGS. 15 and 16, when the left switching member 3A and the right switching member 3B move in the Y1 direction, the roller shaft 6A1 and the roller shaft 6B1 are pushed down by the push-down portion 46a of the roller control cam 46, and the transport roller 6A And 6B are separated from the disk.

(Mechanism unit restraint mechanism)
As shown in FIGS. 2A and 16, the left switching member 3A is formed with a constraining recess 71 that opens in the Y2 direction and a constraining recess 72 that also opens in the Y2 direction. As shown in FIG. 2B, the right switching member 3B is also formed with a constraining recess 73 that opens in the Y2 direction and a constraining recess 74 that also opens in the Y2 direction. As shown in FIG. 2A, the left switching member 3A is formed with a peripheral raised portion 71a that protrudes from the Y1 end of the constraining recess 71 toward the X2 side. FIG. 4 shows the constraining recess 71 and the surrounding raised portion 71a in cross section. Similarly, the right switching member 3B shown in FIG. 2B is also provided with a peripheral raised portion 73a that protrudes from the end portion on the Y1 side of the constraining recess 73 toward the X1 side. Further, a peripheral raised portion 74a that protrudes from the end portion on the Y1 side of the constraining concave portion 74 toward the X1 side is integrally formed.

  As shown in FIG. 3, the lower base 7 constituting the external chassis is a frame body that is formed of a metal plate and side plates are formed on four sides. Support recesses S2 and S4 are formed in the left side plate 7A of the lower base 7, and support recesses S1 and S3 are formed in the right side plate 7B. A damper 70 shown in FIG. 1 is held in each of the support recesses S1 to S4. The damper 70 is an elastic support member in which oil is sealed in a flexible housing such as rubber. As shown in FIG. 1, in the mechanism unit 2, support protrusions are provided at four corners D <b> 1, D <b> 2, D <b> 3, D <b> 4 of the top chassis 10, and each support protrusion is supported by a damper 70. That is, the corner D2 of the top chassis 10 is supported by the damper 70 held in the support recess S2 of the left side plate 7A, and the corner D4 is supported by the damper 70 held in the support recess S4 of the left side plate 7A. Yes. Further, the corner portion D1 and the corner portion D3 are supported by dampers 70, 70 held by the support concave portions S1 and S3 of the right side plate 7B.

  In a state where the mechanism unit 2 is elastically supported through the four dampers 70 inside the lower base 7, the left switching member 3A provided in the mechanism unit 2 faces the inside of the left plate 7A, and the right switching member 3B faces the inside of the right side plate 7B.

  As shown in FIG. 3A, a convex portion 61a is formed on the left side plate 7A. As shown in FIG. 4, the convex portion 61a is integrally formed of a metal plate that forms the left side plate 7A. The base part of the convex part 61a is thick, and the step part 61b is formed in the boundary part of the convex part 61a and a base part. The left side plate 7A has a convex portion 62a on the Y2 side. As shown in FIG. 3B, the convex portion 64a and the convex portion 65a are also formed integrally on the right side plate 7B. A step 64b is formed at the base of the convex portion 64a, and a step 65b is also formed at the base of the convex portion 65a.

  As shown in FIG. 2A, the convex portion 61a of the left side plate 7A can be held by a constraining concave portion 71 provided on the left switching member 3A, and the convex portion 62a can be held by a constraining concave portion 72. As shown in FIG. 2B, the convex portion 64a of the right side plate 7B can be held by the constraining concave portion 73 of the right switching member 3B, and the convex portion 65a can be held by the constraining concave portion 74.

  As shown in FIG. 3A, in the left side plate 7A, a locking projection 63 protruding in the X1 direction is formed at the middle between the projection 61a and the projection 62a. A locking inclined surface 63a that recedes in the X2 direction as it goes in the Y2 direction is formed on the side of the locking projection 63 on the Y2 side. As shown in FIG. 5, the protruding lock member 33 formed integrally with the slider link 31 at the side portion on the X2 side of the mechanism unit 2 can come into contact with the locking inclined surface 63a. As shown in FIG. 3B, in the right side plate 7B, a locking convex portion 66 protruding in the X2 direction is formed between the convex portion 64a and the convex portion 65a. The locking projection 66 is provided with a locking surface 66a facing in the Y1 direction. As shown in FIG. 6, the protrusion lock member 35c of the rotation lock member 35 provided on the X1 side of the mechanism unit 2 can contact the locking surface 66a.

(Mechanism provided on the upper surface of the mechanism unit)
8 to 10 show the structure of the mechanism unit 2 as viewed from the upper surface (the surface facing the Z1 side). 8 to 10 show the mechanism unit 2 with the upper surface opposite to that in FIG. 1 facing the front of the page. 8 to 10, the Y2 direction, which is the insertion direction of the disk D, is shown upward in the drawings.

  As shown in FIG. 8, on the upper surface of the mechanism unit 2, a clamp base 9 is shown on the Y2 side, and a top chassis 10 is shown on the Y1 side. A clamper 11 is rotatably supported at the end of the clamp base 9 on the Y1 side. On the upper surface of the top chassis 10, a shaft 82 is provided on the X1 side, and a detection arm 81 is rotatably supported by the shaft 82. One end of the detection arm 81 shown in FIG. The detection pin 26 is fixed. The detection arm 81 is urged clockwise by a spring 83. The top chassis 10 is provided with a stopper 10e, and the detection arm 81 is regulated so as not to rotate further in the clockwise direction (β direction) than the posture shown in FIG. It can only be rotated counterclockwise (α direction) from the posture shown.

  A guide elongated hole 9b that extends linearly in the X1-X2 direction is formed in the clamp base 9, and a lock member 84 is slidably supported in the elongated guide hole 9b. The lock member 84 is urged in the X1 direction by a spring 85. A lock recess 84a is formed at the edge of the lock member 84 facing the Y2 side. The lock member 84 is provided with a contact portion 84b extending in the Y1 direction. When the detection pin 26 shown in FIG. 8 is pushed in the X1 direction at the edge of the disk D and the detection arm 81 is rotated counterclockwise, the tip 81a of the detection arm 81 facing the Y2 side is The contact portion 84b is pushed, and the lock member 84 is moved in the X2 direction, which is the unlocking direction.

  As shown in FIG. 8, on the upper surface of the clamp base 9, a left positioning arm 87 is rotatably supported by a shaft 86 fixed on the X2 side. A right positioning arm 89 is rotatably supported on a shaft 88 fixed to the X1 side. The left positioning arm 87 is formed with a partial gear 87a in which teeth are arranged in an arc around the shaft 86, and the right positioning arm 89 is formed in a partial gear 89a in which teeth are arranged in an arc around the shaft 88. Is formed. The partial gear 87a and the partial gear 89a mesh with each other, and the left positioning arm 87 and the right positioning arm 89 rotate in synchronization with each other and in opposite directions.

  A positioning projection 91 protrudes downward from the tip of the long arm 87 b of the left positioning arm 87, and a positioning projection 92 protrudes downward from the tip of the long arm 89 b of the right positioning arm 89. The clamp base 9 has a clearance slot 9c on the left side and a clearance slot 9d on the right side. The left positioning protrusion 91 passes through the escape long hole 9c and protrudes downward from the clamp base 9, and the right positioning protrusion 92 passes through the escape long hole 9d and protrudes downward from the clamp base 9.

  A spring support pin 9e is fixed to the upper surface of the clamp base 9. The elastic arms of the torsion spring 93 functioning as a reversing spring are supported by the short arm portion 87c of the left positioning arm 87 and the spring support pin 9e. ing.

  In the disc insertion standby mode shown in FIG. 8, the left positioning arm 87 is urged counterclockwise by the torsion spring 93, and the positioning protrusion 91 provided on the left positioning arm 87 is Y1 of the escape slot 9c. It is pressed against the side edge and is stable. Since the right positioning arm 89 is urged clockwise, the positioning projection 92 is pressed against the end of the escape slot 9d on the Y1 side and is stable. At this time, the positioning projection 92 is held in the lock recess 84a of the lock member 84, and the positioning projection 92 cannot move. As a result, the right positioning arm 89 and the left positioning arm 87 are locked in a state where they cannot rotate. Yes.

  When a small-diameter disc such as a CD or DVD having a diameter of 8 cm is inserted and carried in the Y2 direction by the transport rollers 6A and 6B, when it hits the positioning protrusions 91 and 92 at the position shown in FIG. Further, the center hole of the disk coincides with the center of the turntable and the center of the clamper 11. When a small-diameter standard disc is inserted, the detection pin 26 is pushed in the X1 direction at the outer peripheral edge of the disc and the detection arm 81 rotates in the α direction, but the center hole of the disc is near the rotation center of the turntable. Since the disk has already passed the position of the detection pin 26 when approaching, the detection arm 81 is stable in the posture shown in FIG. Therefore, in a state where the positioning projection 92 is locked by the lock member 84, the outer peripheral edge of the small-diameter standard disk is positioned by hitting the positioning projections 91 and 92.

  When a large-diameter standard disc D such as a CD or DVD having a diameter of 12 cm (the outer peripheral edge is shown in FIG. 9) is inserted, the detection pin 26 is pushed in the X1 direction at the outer peripheral edge of the disc D, The detection arm 81 rotates in the α direction. With this detection arm 81, the lock member 84 is pushed and moved in the X2 direction, the lock recess 84a is disengaged from the positioning protrusion 92, and the lock on the positioning protrusion 92 is released. Since the outer peripheral edge of the disk D facing the Y2 side hits the positioning protrusions 91 and 92 in the unlocked state, when the disk D is subsequently transported in the Y2 direction by the transport rollers 6A and 6B, the positioning protrusion 91 is Then, it is pushed by the outer peripheral edge of the disk D and moves in the escape slot 9c in the Y2 direction, and the positioning projection 92 also moves in the escape slot 9d in the Y2 direction. Along with this, the left positioning arm 87 rotates clockwise, and the right positioning arm 89 rotates counterclockwise.

  When the left positioning arm 87 and the right positioning arm 89 are rotated to the angle shown in FIG. 9, the left positioning arm 87 is urged clockwise and stabilized by the urging force of the torsion spring 93, and the right positioning arm 89 is counterclockwise. Energized in the direction to stabilize. When the outer peripheral edge of the large-diameter standard disc D hits the positioning projections 91 and 92 at the positions shown in FIG. 9, the center hole of the disc D is positioned so as to coincide with the turntable and the clamper 11. The

  When the large-diameter standard disc D is carried out by the transport rollers 6A and 6B, when the disc D moves a predetermined distance in the Y1 direction, the outer peripheral edge of the disc D hits the detection pin 26, and the detection pin 26 moves in the X1 direction. The detection arm 81 is pushed and rotated in the α direction. Then, the lock member 84 is pushed in the X2 direction by the detection arm 81. At this time, as shown in FIG. 9, the pressed arm 89c of the right positioning arm 89 rotating in the counterclockwise direction is pushed in the X2 direction by the lock member 84, and the right positioning arm 89 is rotated in the clockwise direction. It is done. Then, the acting direction of the urging force of the torsion spring 93 is reversed, and the left positioning arm 87 and the right positioning arm 89 return to the initial standby mode shown in FIG.

  As shown in FIG. 9, the clamp base 9 is formed with a sliding long hole 9f on the X1 side of the clearance long hole 9c. Further, a long support hole 9g is formed at the end of the clamp base 9 on the X2 side.

  A loading detection arm 94 is provided on the lower surface of the clamp base 9. The loading detection arm 94 is formed of a thin metal plate. In the loading detection arm 94, a fulcrum pin 95 is fixed to the end portion on the X2 side, and a moving pin 96 is fixed to the X1 side. The fulcrum pin 95 is slidably inserted into the long support hole 9 g formed in the clamp base 9. The moving pin 96 protrudes upward from the sliding long hole 9 f formed in the clamp base 9. A control long hole 87d is formed in the long arm 87b of the left positioning arm 87, and the moving pin 96 is slidably inserted into the control long hole 87d.

  As shown in FIG. 9, a holding recess 94a is formed at the end of the loading detection arm 94 on the X2 side, and a spring hook 94b is bent in the vicinity thereof. A tension coil spring 97 is hung between the spring hook portion 94 b and the clamp base 9. The urging force of the tension coil spring 97 acts on the left end of the loading detection arm 94. With this urging force, the fulcrum pin 95 is pressed against the end on the Y2 side of the support elongated hole 9g, and the loading detection arm 94 is urged clockwise with the fulcrum pin 95 as a fulcrum.

  In the disc insertion standby mode shown in FIG. 8, the left positioning arm 87 is rotated counterclockwise and is stable. At this time, the moving pin 96 held in the control slot 87d is pressed against the Y1 side end of the sliding slot 9f. Therefore, the loading detection arm 94 rotates clockwise with the fulcrum pin 95 as a fulcrum. When the large-diameter standard disk D is inserted and carried by the transport rollers 6A and 6B, and the positioning protrusion 91 is pushed by the disk D and the left positioning arm 87 is rotated clockwise as shown in FIG. By the control slot 87d, the moving pin 96 is moved in the Y2 direction along the sliding slot 9f. Therefore, the loading detection arm 94 is rotated counterclockwise with the fulcrum pin 95 as a fulcrum.

  Further, a small-diameter disk detection unit 94c is provided at the end of the loading detection arm 94 on the X1 side. When a small-diameter standard disc is inserted and transported by the transport rollers 6A and 6B, the outer peripheral edge of the small-diameter standard disc hits the positioning protrusions 91 and 92 which are stable at the position shown in FIG. The table and the clamper 11 are matched. At this time, the small-diameter disk detector 94c formed on the loading detection arm 94 is pressed in the Y2 direction at the outer peripheral edge of the small-diameter disk. At this time, the loading detection arm 94 is rotated counterclockwise with the moving pin 96 as a fulcrum.

(Structure of power switching mechanism)
As shown in FIGS. 1 and 8 to 10, the mechanism unit 2 is provided with a power switching mechanism 100 on the X2 side. In the power switching mechanism 100, when the large-diameter standard disk D is loaded, the center hole thereof coincides with the turntable, and the loading detection arm 94 is rotated counterclockwise, or the small-diameter standard disk is loaded. When positioned on the turntable and the loading detection arm 94 is rotated counterclockwise, the power of the switching motor M is applied to the first rotation member 20, and as shown in FIG. This is a mechanism for rotating one rotating member 20 clockwise.

  The power switching mechanism 100 is provided with a trigger member 101. The trigger member 101 is rotatably supported on a shaft 102 fixed to the lower surface of the top chassis 10. The trigger member 101 has a metal arm 101a, and the metal arm 101a is rotatably supported on the shaft 102. A metal switching pin 103 is fixed to the metal arm 101a, and this switching pin 103 is held in a holding recess 94a formed in the loading detection arm 94. The trigger member 101 is provided with a pressing arm 104. The pressing arm 104 is made of synthetic resin, and is formed to have a size that is not easily deformed in a direction parallel to the paper surface of FIGS. 8 and 9 but elastically deformable in a direction orthogonal to the paper surface. The pressing arm 104 is formed integrally with the metal arm 101a by an outsert molding process or the like.

  As shown in FIG. 8, the trigger member 101 is rotated counterclockwise about the shaft 102 in a mode in which the disc is waiting to be inserted. As shown in FIG. 9, when the large-diameter disc D is loaded and the left positioning arm 87 is rotated and stabilized in the clockwise direction, the loading detection arm 94 is rotated in the counterclockwise direction. Is rotated clockwise. When the small-diameter standard disc is positioned against the positioning projections 91 and 92 at the position shown in FIG. 8, the loading detection arm 94 is rotated counterclockwise at the outer peripheral edge of the small-diameter standard disc, and the trigger member 101 is rotated clockwise.

  11A and 11B show the power switching mechanism 100 with the bottom side facing upward, and FIGS. 12 to 14 show the power switching mechanism 100 in the same direction as FIGS. 8 to 10. .

  As shown in FIG. 11A, in the gear group H driven by the switching motor M shown in FIG. 1, a rotating shaft 111 extending in the Y1-Y2 direction is provided below the bottom chassis 12. As shown in FIGS. 1 and 11A, a helical gear 112 is fixed to the end of the rotating shaft 111 on the Y2 side, and the power of the switching motor M is transmitted to the helical gear 112. The The rotating shaft 111 extends in the Y1 direction along the bottom chassis 12, and a rotating force is applied from the rotating shaft 111 to the roller shafts 6A1 and 6B1 of the conveying rollers 6A and 6B.

  A worm gear 113 is fixed to the Y2 side end of the rotating shaft 111 along with the helical gear 112. A shaft 114 a is fixed to the lower surface of the bottom chassis 12, and a worm wheel 114 is rotatably supported on the shaft 114 a, and the worm wheel 114 meshes with the worm gear 113. A shaft 116 is fixed to the bottom chassis 12, and a driving gear 115 is rotatably supported on the shaft 116. The drive gear 115 has a large-diameter gear portion 115a and a small-diameter gear portion 115b formed integrally. As shown in FIG. 11A, the large-diameter gear portion 115 a is a spur gear, and the large-diameter gear portion 115 a meshes with the worm wheel 114. 12 to 14 show the small-diameter gear portion 115b from the opposite side to FIG. 11 (A). The small diameter gear portion 115b is also a spur gear.

  When the disk D is carried into the mechanism unit 2, the power of the switching motor M is transmitted to the rotary shaft 111, and the drive gear 115 is rotationally driven in the γ1 direction. When the disk D is unloaded from the mechanism unit 2, the rotation direction of the switching motor M is reversed and the drive gear 115 is driven to rotate in the γ2 direction.

  As shown in FIGS. 11A and 11B, the shaft 21 also shown in FIG. 1 is fixed to the lower surface of the bottom chassis 12, and the center hole 20c of the first rotating member 20 is formed. The shaft 21 is rotatably inserted. As described above, the first rotating member 20 is integrally formed with the driving protrusion 20a that engages with the left switching member 3A and moves the left switching member 3A in the Y1-Y2 direction. Further, a connecting pin 20b connected to the slider link 31 shown in FIG. 1 is formed integrally with the protruding portion on the Y1 side of the first rotating member 20.

  The first rotating member 20 is formed with a partial gear portion 20d in which teeth are arranged along an arc locus centering on the center hole 20c. The partial gear portion 20d can mesh with the teeth of the small-diameter gear portion 115b shown in FIG. As shown in FIG. 11B, the first rotating member 20 is formed with a differential connection hole 20e penetrating vertically. As shown in FIG. 12A, the differential coupling hole 20e opens along an arc locus centering on the center hole 20c. Further, the first rotating member 20 is formed with a spring accommodating hole 20f penetrating vertically. As shown in FIG. 11B, the first rotating member 20 is formed with a shaft portion 20h protruding in the Z2 direction and a connecting recess 20g formed on the side of the shaft portion 20h. The connecting recess 20g is formed along an arc locus centering on the shaft portion 20h. Therefore, the connecting recess 20g may be a long hole formed along an arc locus centering on the shaft portion 20h.

  As shown in FIGS. 11A and 11B, a second rotating member 120 is provided between the first rotating member 20 and the bottom chassis 12. As shown in FIGS. 12A and 12B, the second rotation member 120 has a center hole 120a, and the center hole 120a is rotatably inserted into the shaft 21. The second rotating member 120 is also formed with a partial gear portion 120b in which teeth are arranged along an arc locus centering on the center hole 120a. The partial gear portion 120b can mesh with the small-diameter gear portion 115b.

  Hereinafter, the drive gear 115 rotates in the γ1 direction, and this rotational force is transmitted to the partial gear portion 120b and the partial gear portion 20d, causing the first rotating member 20 and the second rotating member 120 to rotate. The rotation direction when the rotation is performed is defined as the φ1 direction, and the rotation direction given to the first rotation member 20 and the second rotation member 120 when the drive gear 115 rotates in the γ2 direction is defined as the φ2 direction.

  The partial gear portion 20d formed on the first rotating member 20 and the partial gear portion 120b formed on the second rotating member 120 are arranged to overlap each other. However, as shown in FIG. 13B, the partial gear portion 120b is formed by the second rotating member 120, rather than the angle range θ1 in which the partial gear portion 20d is formed by the first rotating member 20. The angle range θ2 is wider. That is, the number of teeth of the partial gear portion 120b is larger than the number of teeth of the partial gear portion 20d. As shown in FIG. 13B, when the first rotating member 20 and the second rotating member 120 are overlapped and combined, one of the partial gear portions 120b of the second rotating member 120 is obtained. The teeth of the portion protrude in the φ1 direction from the partial gear portion 20 d of the first rotating member 20.

  As shown in FIG. 11A, the second rotating member 120 is integrally formed with an urging protrusion 120 c, and the urging protrusion 120 c is formed in the spring housing hole 20 f of the first rotating member 20. Has been inserted inside. The compression coil spring 118 is housed in a slightly compressed state between the end of the spring housing hole 20f and the biasing projection 120c. By this compression coil spring 118, an urging force in the φ1 direction is applied to the first rotating member 20, and an urging force in the φ2 direction is applied to the second rotating member 120.

  As shown in FIG. 12A, the second rotating member 120 is integrally formed with a connecting pin 120d that protrudes in the lower Z2 direction, and this connecting pin 120d serves as the first rotating member. It is inserted into a differential connection hole 20 e formed in the member 20. As shown in FIG. 12 (A), when the first rotating member 20 and the second rotating member 120 are not applied with forces that restrain each other, the first rotating member 20 moves in the φ1 direction. Since the second rotation member 120 attempts to rotate in the φ2 direction, the connecting pin 120d is located at the φ2 side end of the differential connecting hole 20e.

  As shown in FIGS. 11B and 12A, the second rotating member 120 is formed with a connecting elongated hole 121 penetrating in the vertical direction. The connection long hole 121 has a movement allowing portion 121a on the φ1 side, and a locking portion 121b on the φ2 side that is closer to the shaft 21 side than the movement allowing portion 121a. The movement allowing portion 121 a is formed along an arc locus centering on the shaft 21.

  As shown in FIGS. 11A and 11B, an intermittent member 122 is provided below the first rotating member 20 (Z2 side). In the intermittent member 122, a support hole 122 a formed in the base end portion is rotatably supported by a shaft portion 20 h formed in the first rotating member 20. A connection protrusion 126 is fixed to the intermittent member 122, and the connection protrusion 126 is connected to the connection recess 20 g of the first rotation member 20 and the connection elongated hole 121 formed in the second rotation member 120. Has been inserted.

  As shown in FIG. 8, the bottom chassis 12 is formed with a control slot 125 penetrating vertically. The tip of the connecting projection 126 of the intermittent member 122 is inserted into the control slot 125. The control slot 125 has a connection guide portion 125a extending in the φ1 direction and a rotation restricting portion 125b formed continuously at the end portion on the φ2 side. The connection guide part 125 a is formed along an arc locus centering on the shaft 21. The radius from the shaft 21 to the connection guide portion 125 a is the same as the radius from the shaft 21 to the locking portion 121 b of the connection long hole 121.

  The rotation restricting portion 125b is formed to bend toward the side farther from the shaft 21 than the connection guide portion 125a. The radius from the shaft 21 to the rotation restricting portion 125b is the same as the radius from the shaft 21 to the movement allowing portion 121a of the connection slot 125.

  As shown in FIG. 12A, on the upper surface (the surface directed to the Z1 side) of the second rotating member 120, a pressed projection 123 protruding in the Z1 direction, and the pressed projection 123 in the φ2 direction. Opposing protrusions 124 are also formed that protrude in the Z1 direction at an interval. The surface of the pressed protrusion 123 on the side away from the shaft 21 is an inclined portion 123a. The inclined portion 123a is formed so as to gradually rise in the Z1 direction from the surface of the second rotating member 120 toward the shaft 21. Therefore, as shown in FIG. 14, the trigger member 101 moves counterclockwise as shown in FIG. 12A from the state where the pressing arm 104 of the trigger member 101 is positioned on the outer peripheral side of the pressed protrusion 123. When rotating, the pressing arm 104 slides on the inclined portion 123 a to get over the pressed protrusion 123, and can move to the inner peripheral side with respect to the pressed protrusion 123.

Next, the operation of the disk device 1 will be described.
(Disc insertion standby mode)
In the insertion standby mode for waiting for the disk to be loaded into the disk device 1, as shown in FIG. 8, the left positioning arm 87 rotates counterclockwise and the right positioning arm 89 rotates clockwise. The right positioning protrusion 92 is held in the lock recess 84 a of the lock member 84. The loading detection arm 94 is rotated clockwise, and the trigger member 101 is rotated counterclockwise by the holding recess 94a of the loading detection arm 94. Accordingly, as shown in FIG. 12A, the pressing arm 104 of the trigger member 101 is located on the inner peripheral side with respect to the pressed protrusion 123 formed on the second rotating member 120.

  The connection protrusion 126 provided on the intermittent member 122 shown in FIG. 11 penetrates the connection recess 20 g formed in the first rotation member 20 and the connection long hole 121 formed in the second rotation member 120. Then, it is inserted into a control slot 125 formed in the bottom chassis 12. In the standby mode shown in FIG. 12A, the connection protrusion 126 is positioned in the movement allowing portion 121 a of the connection elongated hole 121 and the rotation restricting portion 125 b of the control elongated hole 125. The connection protrusion 126 is positioned in the rotation restricting portion 125 b of the control slot 125 formed in the bottom chassis 12, and the connection protrusion 126 is positioned in the connection recess 20 g of the first rotation member 20. Therefore, the first rotating member 20 is held so as not to move in the state of being rotated to the rotation limit position in the φ2 direction. Therefore, the partial gear portion 20 d formed on the first rotating member 20 is disengaged from the teeth of the small-diameter gear portion 115 b of the drive gear 115 in the φ2 direction.

  In addition, since the connection protrusion 126 is located in the movement allowable portion 121a of the connection elongated hole 121 of the second rotation member 120, the second rotation is performed within the range of the length of the movement allowable portion 121a. The member 120 can move. As shown in FIG. 11 (A), the second rotating member 120 is urged in the φ2 direction by the compression coil spring 118 housed in the spring housing hole 20f. In the standby mode, the second rotating member 120 rotates in the φ2 direction with respect to the first rotating member 20, and the connecting pin 120d provided on the second rotating member 120 performs the first rotation. The differential connection hole 20e formed in the member 20 is pressed against the end on the φ2 side. Therefore, the partial gear portion 120b provided on the second rotating member 120 is also disengaged from the small-diameter gear portion 115b toward the φ2 side, and the posture of the second rotating member 120 is stable in this state.

  As shown in FIG. 12A, in the mode of waiting for the insertion of the disc, the first protrusion 20 is held by the connecting protrusion 126 held by the rotation restricting portion 125b of the bottom chassis 12. The posture of the partial gear portion 20d is stable at a position away from the small diameter gear portion 115b. Therefore, even if external vibration or the like acts, the first rotating member 20 does not rotate carelessly, and it is possible to prevent the partial gear portion 20d from meshing with the small diameter gear portion 115b by mistake.

  Thus, in the mode of waiting for the insertion of the disc, as shown in FIGS. 8 and 12A, the first rotating member 20 is rotated clockwise (when viewed from FIG. The first rotating member 20 is rotating counterclockwise).

  Therefore, the left switching member 3A is moved in the X2 direction by the drive protrusion 20a of the first rotating member 20. As shown in FIG. 1, the slider link 31 connected to the first rotating member 20 via the connecting pin 20b is moved in the X2 direction. Then, the reverse link 32 provided on the X1 side in FIG. 1 is rotated in the clockwise direction, and the right switching member 3B is moved in the Y2 direction by the drive protrusion 32c of the reverse link 32.

  At this time, as shown in FIG. 2A, the roller shafts 6A1 and 6B1 of the transport rollers 6A and 6B are in the clearance spaces 46b and 46b of the roller control cams 46 and 46 formed on the left switching member 3A. The conveying rollers 6A and 6B are elastically pressed against the lower surface of the sliding member fixed to the lower side of the top chassis 10 by an urging force such as a spring.

  Further, as shown in FIG. 7, when the slider link 31 is moved in the X2 direction, the control pin 31 c fixed to the control plate 31 b formed on the slider link 31 is provided on the drive base 8. Located in the push-down portion 8b2 of the switching cam 8b, the drive base 8 is in a disk standby posture (retracted posture) in which the tip portion having the rotation drive portion 4 is lowered with the shaft pins 8a1 and 8a2 as fulcrums.

  Further, as shown in FIG. 2B, the control piece 9h integrated with the clamp base 9 is lifted by the lifting portion 45a of the clamp lifting cam 45 formed on the right switching member 3B. Therefore, a large space is formed between the turntable provided in the rotation drive unit 4 of the drive base 8 and the clamper 11 provided in the clamp base 9.

  In the disc insertion standby mode, the mechanism unit 2 elastically supported by the external chassis via the damper 70 is restrained so as not to move within the external chassis. By restraining the mechanism unit 2, it is possible to restrict the mechanism unit 2 from inadvertently moving when a disk is inserted from the outside, and the disk can be reliably guided to the rotation drive unit 5.

  In the disc insertion standby mode, as shown in FIG. 2 (A), the left switching member 3A is moving in the Y2 direction, so that the restraint recess 71 provided in the left switching member 3A is shown in FIG. 3 (A). The convex part 61a provided in the lower base 7 to be shown is held. At this time, as shown in FIG. 4, the convex portion 61 a is pressed against the end portion on the Y1 side of the constraining concave portion 71. The same applies to the relationship between the constraining concave portion 72 and the convex portion 62a provided in the left switching member 3A. Further, as shown in FIG. 2 (B), since the right switching member 3B is moved in the Y2 direction, the convex portion 64a shown in FIG. 3 (B) is placed in the restraining concave portion 73 provided in the right switching member 3B. The convex portion 65 a is held in the constraining concave portion 74. At this time, the convex portion 64a is pressed against the end portion on the Y1 side of the constraining concave portion 73, and the convex portion 65a is pressed against the end portion on the Y1 side of the constraining concave portion 74.

  Each of the constraining recesses 71, 72, 73, 74 holds the projections 61a, 62a, 64a, 65a provided in the lower base 7, so that the mechanism unit 2 is further in the Y2 direction in the lower base 7. It is restrained not to move. Further, the upper and lower inner width dimensions of the constraining recesses 71, 72, 73, and 74 and the diameter dimensions of the protrusions 61a, 62a, 64a, and 65a are substantially matched, so that the mechanism unit 2 is provided in the lower base 7. Is restricted so as not to move in the vertical direction (Z1-Z2 direction).

  Further, as shown in FIG. 4, when the left switching member 3A is moved in the Y2 direction, the peripheral raised portion 71a protruding from the periphery of the constraining concave portion 71 contacts the stepped portion 61b of the base portion of the convex portion 61a. . When the left switching member 3A moves in the Y1 direction, the peripheral raised portion 71a is separated from the stepped portion 61b. Similarly, when the right switching member 3B shown in FIG. 2B is moved in the Y2 direction, the peripheral raised portion 73a protruding from the periphery of the constraining concave portion 73 abuts on the stepped portion 64b of the base portion of the convex portion 64a. The peripheral raised portion 74a protruding from the periphery of the constraining concave portion 74 abuts on the step portion 65b of the convex portion 65a.

  In this way, the peripheral raised portions 71a, 73a, 74a abut on the step portions 61b, 64b, 65b, so that the mechanism unit 2 does not move in the left-right direction (X1-X2 direction) in the lower base 7. Be regulated.

  Further, in the disc insertion standby mode shown in FIG. 1, the slider link 31 provided in the mechanism unit 2 is moved in the X2 direction, and as shown in FIG. A contact portion 33a, which is a portion, is in contact with a locking inclined surface 63a formed on the left side plate 7A. Further, at this time, as shown in FIG. 6, the rotation lock member 35 is rotated counterclockwise, and the contact portion 35d of the protruding lock member 35c, which is a part of the rotation lock member 35, is formed on the right side plate 7B. It abuts on the locking surface 66a of the formed locking projection 66.

  The mechanism unit 2 is restricted from moving in the Y1 direction in the lower base 7 by the contact between the protruding lock member 33 and the locking inclined surface 63a and the contact between the protruding lock member 35c and the locking projection 66. Is done. As described above, the left switching member 3A, the right switching member 3B, and the link mechanism 30 restrain the mechanism unit 2 from moving in the X, Y, and Z directions in the external chassis.

(Disc loading operation)
When the disc is inserted from the insertion slot, the detection pins 26 and 26 shown in FIG. 1 are pushed open by the outer peripheral edge of the disc, and a switch (not shown) is operated. Thereby, the insertion of the disk is detected, and the switching motor M is started. The power of the switching motor M is transmitted to the helical gear 112 shown in FIG. 11A, and the rotating shaft 111 rotates. The rotational force of the rotating shaft 111 is applied to the roller shafts 6A1 and 6B1, and the transport roller 6A and the transport roller 6B start to rotate in the disk loading direction. The inserted disk D is sandwiched between the transport rollers 6A and 6B and the sliding member, and is carried in the back direction (Y2 direction) of the mechanism unit 2.

  When the large-diameter standard disk D is being loaded, the detection pin 26 shown in FIG. 8 is pushed at the outer peripheral edge of the disk D to rotate the detection arm 81 in the α direction. The lock member 84 is pushed in the X2 direction by the distal end portion 81a, and the lock recess 84a of the lock member 84 is detached from the positioning projection 92. Therefore, as shown in FIG. 9, at the outer peripheral edge of the disk D, the positioning projection 91 and the positioning projection 92 are pushed in the Y2 direction, the direction of the urging force of the torsion spring 93 is reversed, and the left positioning arm 87 is rotated clockwise. Stabilized in a rotated position. Therefore, the large-diameter standard disk D is positioned by hitting the positioning protrusion 91 and the positioning protrusion 92. At this time, the loading detection arm 94 is rotated counterclockwise about the fulcrum pin 95 by the control slot 87d of the left positioning arm 87, and when viewed from the direction shown in FIG. It can be rotated clockwise with 102 as a fulcrum.

  When a small-diameter standard disk is inserted, the disk is positioned by hitting the positioning protrusions 91 and 92 locked at the position shown in FIG. At this time, the small-diameter disk detection portion 94c of the loading detection arm 94 is pushed at the outer peripheral edge of the small-diameter standard disk, and the loading detection arm 94 is rotated counterclockwise around the moving pin 96 as a fulcrum. Is rotated clockwise with the shaft 102 as a fulcrum.

  As described above, when the center hole of the large diameter standard disc D or the center hole of the small diameter standard disc is positioned on the turntable, the trigger member 101 is rotated clockwise as shown in FIG.

  At this time, as shown in FIGS. 12A and 12B, the pressed projection 123 of the second rotating member 120 is pressed in the X2 direction by the pressing arm 104 of the trigger member 101, and the second rotating member. 120 is rotated in the φ1 direction. In the state of FIG. 12 (A), the connecting projection 126 (see FIG. 11 (B)) fitted in the connecting recess 20g of the first rotating member 20 has a control slot 125 formed in the bottom chassis 12. Is located within the rotation restricting portion 125b. Therefore, only the second rotating member 120 is rotated in the γ1 direction by the pressing force of the pressing arm 104 without the first rotating member 20 rotating in the γ1 direction, and the partial gear portion 120b is driven as the drive gear. 115 meshes with the teeth of the small-diameter gear portion 115b.

  During this time, the switching motor M continues to rotate, and the drive gear 115 rotates in the γ1 direction. Therefore, as shown in FIG. 12B, when the teeth of the partial gear portion 120b of the second rotating member 120 mesh with the small diameter gear portion 115b, the second rotating member 120 is caused by the rotational force of the small diameter gear portion 115b. Is given a rotational force in the φ1 direction.

  As shown in FIG. 12B, the connection protrusion 126 is formed at the same time as or immediately before the partial gear portion 120b of the second rotating member 120 meshes with the teeth of the small-diameter gear portion 115b of the drive gear 115. The second rotating member 120 is guided into the engaging portion 121b of the connection elongated hole 121 in which the second rotating member 120 is formed. The connection protrusion 126 is moved into the connection guide portion 125 a of the control slot 125 formed in the bottom chassis 12. Therefore, after that, the second rotating member 120 and the first rotating member 20 are connected together while the first rotating member 20 and the second rotating member 120 are connected by the connecting protrusion 126. It rotates in the φ1 direction. At the time of FIG. 12B, the small-diameter gear portion 115b meshes with the partial gear portion 120b of the second rotating member 120, but the second rotating member 120 and the first rotating member 20 are in the φ1 direction. Is rotated by a predetermined angle, the teeth of the small-diameter gear portion 115 b mesh with not only the partial gear portion 120 b of the second rotating member 120 but also the partial gear portion 20 d of the first rotating member 20. Then, the first rotating member 20 is rotated in the φ1 direction by the rotational force of the small-diameter gear portion 115b.

  Thus, in the operation from FIG. 12A to FIG. 12B, first, the rotation of the first rotating member 20 is restricted by the fitting of the connecting protrusion 126 and the locking portion 121b. The second rotating member 120 rotates in the φ1 direction, and the partial gear portion 120b of the second rotating member 120 meshes with the small diameter gear portion 115b. Thereafter, the first rotating member 20 and the second rotating member 120 are connected, and the first rotating member 20 and the second rotating member 120 rotate together by the rotational force of the small-diameter gear portion 115b. Be moved. Therefore, the operation from when the partial gear portion 120b of the second rotating member 120 is engaged with the small diameter gear portion 115b to when the partial gear portion 20d of the first rotating member 20 is engaged is smoothly and reliably performed. .

  Thereafter, the first rotating member 20 is rotated in the φ1 direction by the small-diameter gear portion 115b. Then, when the first rotating member 20 is rotated to the posture shown in FIG. 13A, the switching motor M stops.

  During this time, as shown in FIG. 15, the left switching member 3A is moved in the Y1 direction and the slider link 31 is moved in the X1 direction by the drive protrusion 20a provided on the first rotating member 20. The moving force of the slider link 31 is applied to the right switching member 3B via the reverse rotation link 32, and the right switching member 3B is also moved in the Y1 direction.

  When the slider link 31 is moved in the X1 direction, as shown in FIG. 17, the control pin 31c provided on the control plate 31b of the slider link 31 switches the attitude provided on the end of the drive base 8 on the Y1 side. The cam 8b moves into the lifting portion 8b1, and the drive base 8 is lifted to assume a substantially horizontal driving posture. When the right switching member 3B shown in FIG. 2B moves in the Y1 direction, the escape space 45b of the clamp lifting cam 45 moves to the position of the control piece 9h integrated with the clamp base 9. Therefore, the clamp base 9 is lowered by the urging force of the pressing urging member, and the center hole of the disk is sandwiched between the turntable provided in the rotation driving unit 4 and the clamper 11.

  When the left switching member 3A and the right switching member 3B move in the Y1 direction, the roller shaft 6A1 and the roller shaft 6B1 are pushed down by the push-down portion 46a of the roller control cam 46, and the transport rollers 6A and 6B are separated from the lower surface of the disk. .

  As shown in FIG. 16, when the left switching member 3A moves in the Y1 direction, the constraining concave portions 71 and 72 are separated from the convex portions 61a and 62a formed on the left side plate 7A. Similarly, when the right switching member 3B moves in the Y1 direction, the constraining concave portions 73 and 74 are separated from the convex portions 64a and 65a. Further, since the slider link 31 moves in the X1 direction, the protruding lock member 33 is separated from the locking inclined surface 63a of the left side plate 7A shown in FIG. 5, and the rotation lock member 35 shown in FIG. It rotates and the contact part 35d of the protrusion lock member 35c provided in the rotation lock member 35 leaves | separates from the latching convex part 66 of the right side board 7B shown in FIG.

  Therefore, the mechanism unit 2 is elastically supported by the damper 70 in the external chassis. In this state, the turntable and the disk are rotated by the spindle motor 5 provided in the rotation driving unit 4, and the recording or reproducing operation for the disk is performed by the head unit 17. Since the mechanism unit 2 is elastically supported, it is possible to suppress external vibrations acting on the external chassis from directly acting on the mechanism unit 2.

(Disc eject operation)
When an operation for ejecting the disc is performed after the drive of the disc is completed, the switching motor M is started. The rotation direction of the switching motor M at this time is opposite to that during the disk loading operation, and the conveying rollers 6A and 6B are rotated in the disk unloading direction by the rotational force of the switching motor M. At this time, the drive gear 115 shown in FIG. 11A is rotated in the γ2 direction.

  When the disk is driven, the power switching mechanism 100 is set to the state shown in FIG. At this time, when the driving gear 115 rotates in the γ2 direction, the first rotating member 20 and the second rotating member 120 engaged with the small-diameter gear portion 115b of the driving gear 115 are rotated in the φ2 direction.

  In the state of FIG. 13A, the connection protrusion 126 is positioned in the connection guide portion 125 a of the control slot 125 formed in the bottom chassis 12, and therefore the connection protrusion 126 is not connected to the second rotating member 120. It is locked to the locking portion 121b of the formed connecting long hole 121. Therefore, the 1st rotation member 20 and the 2nd rotation member 120 are connected so that it may rotate together.

  When the small-diameter gear portion 115b rotates in the γ2 direction from the state of FIG. 13A, the first rotating member 20 and the second rotating member 120 are rotated together in the φ2 direction. The partial gear portion 20d of the first rotating member 20 is formed in the range of θ1 shown in FIG. 13B, and the partial gear portion 120b of the second rotating member 120 is in the range of θ2 wider than θ1. Therefore, in the rotation operation in the φ2 direction, when the partial gear portion 20d of the first rotation member 20 is detached from the small-diameter gear portion 115b, the partial gear portion of the second rotation member 120 is still present. 120b meshes with the small-diameter gear portion 115b. At this time, since the first rotation member 20 and the second rotation member 120 are connected to each other by the connection protrusion 126, the first rotation member 20d is separated from the small-diameter gear portion 115b even after the partial gear portion 20d is separated from the small-diameter gear portion 115b. The moving member 20 is integrally rotated with the second rotating member 120 and further rotated in the φ2 direction.

  As shown in FIG. 13B, after the first rotating member 20 is rotated in the φ2 direction, the teeth of the partial gear portion 120b of the second rotating member 120 are the same as those of the small-diameter gear portion 115b. At the same time as or away from the teeth, the connecting protrusion 126 is guided to the rotation restricting portion 125b of the control slot 125, and the connecting protrusion 126 is a movement allowing portion 121a formed on the second rotating member 120. Moved in. Therefore, immediately after the partial gear portion 120b is separated from the teeth of the small-diameter gear portion 115b, the second rotating member 120 is rotated in the φ2 direction by the urging force of the compression coil spring 118 shown in FIG. It is done.

  As shown in FIG. 14, by the urging force of the compression coil spring 118, the second rotating member 120 is rotated until the connecting pin 120d hits the end surface of the differential connecting hole 20e on the φ2 side, and stops at that position. To do. At this time, the partial gear portion 120b of the second rotating member 120 is completely separated from the small diameter gear portion 115b.

  Thus, when the small-diameter gear portion 115b rotates in the γ2 direction from the state shown in FIG. 13A and the partial gear portion 20d of the first rotating member 20 is separated from the small-diameter gear portion 115b, the first The rotating member 20 and the second rotating member 120 are connected by a connecting protrusion 126, and the partial gear portion 120b of the second rotating member 120 is engaged with the small-diameter gear portion 115b. Therefore, even after the partial gear portion 20d is separated from the small-diameter gear portion 115b, the first rotating member 20 is reliably rotated to the position shown in FIG. 13B by the rotational force of the drive gear 115. Therefore, the left switching member 3A can be reliably returned in the Y2 direction by the drive protrusion 20a of the first rotating member 20, and the partial gear portion 20d of the first rotating member 20 can be reliably removed from the small diameter gear portion 115b. Can be released.

  When the first rotating member 20 rotates in the φ2 direction, the left switching member 3A is rotated in the Y2 direction by the drive protrusion 20a formed on the first rotating member 20, and the first switching member 3A is further rotated in the Y2 direction. The slider link 31 is moved in the X2 direction by the rotational force of the rotating member 20, the reverse link 32 shown in FIG. 1 is rotated in the clockwise direction, and the right switching member 3B is moved in the Y2 direction. Therefore, as shown in FIG. 2A, the convex portions 61a and 62a provided on the lower base 7 are held by the constraining concave portions 71 and 72 of the left switching member 3A, and as shown in FIG. The convex portions 64a and 65a provided on the lower base 7 are held by the constraining concave portions 73 and 74 of the right switching member 3B. Further, as shown in FIGS. 5 and 6, the projecting lock members 33 and 35 c are pressed against the lower base 7 and the mechanism unit 2 is restrained.

  Further, the drive base 8 is rotated obliquely downward, the clamp base 9 is lifted, the clamper 11 is separated from the turntable, and the clamp of the disk D is released.

  As described above, after the first rotating member 20 is rotated in the φ2 direction, the mechanism unit 2 is restrained and the disc is released from the clamp, as shown in FIG. The partial gear portion 20d of the moving member 20 and the partial gear portion 120b of the second rotating member 120 are separated from the small diameter gear portion 115b. Therefore, the subsequent power of the switching motor M is not transmitted to the first rotating member 20, and the power of the switching motor M is transferred to the transport rollers 6A and 6B by the rotating shaft 111 shown in FIG. Communicated. Then, the disk is ejected from the insertion slot by the rotational force of the transport rollers 6A and 6B.

  Here, when the large-diameter standard disc D has been loaded so far, as shown in FIG. 9, the left positioning arm 87 rotates clockwise and the right positioning arm 89 counterclockwise. The positioning arms 87 and 89 are stabilized by the urging force of the torsion spring 93 in a state where the torsion spring 93 is rotated. Therefore, when the disc D is released and the disc D starts to be carried out toward the insertion slot, the left positioning arm 87 and the right positioning arm 89 are stable in the state shown in FIG. The arm 94 is also stable in a state of rotating counterclockwise.

  Therefore, as shown in FIG. 14, when the first rotating member 20 and the second rotating member 120 have finished rotating in the φ2 direction, the trigger member 101 remains rotating in the clockwise direction, The pressing arm 104 of the trigger member 101 is positioned on the outer peripheral side with respect to the pressed protrusion 123 provided on the second rotating member 120.

  When the peripheral edge facing the Y1 side of the disk D carried out by the transport rollers 6A and 6B hits the detection pin 26, the detection arm 81 (see FIG. 8) provided with the detection pin 26 rotates in the α direction, and the detection arm The lock member 84 is moved in the X2 direction by 81, and the pressed arm 89c of the right positioning arm 89 in the state of FIG. Therefore, the right positioning arm 89 is rotated clockwise, the left positioning arm 87 is rotated counterclockwise, the direction of the urging force of the torsion spring 93 is reversed, and both positioning arms 87 and 89 are shown in FIG. Return to the indicated state.

  FIG. 10 shows a state where the direction of the urging force of the torsion spring 93 is reversed and the left positioning arm 87 is rotated counterclockwise and returned. At this time, the loading detection arm 94 is rotated clockwise around the fulcrum pin 95 by the control slot 87d of the left positioning arm 87. Then, the trigger member 101 is rotated counterclockwise about the shaft 102 by the holding recess 94 a of the loading detection arm 94. At this time, the elastically deformable pressing arm 104 of the trigger member 101 slides on the inclined portion 123a of the pressed protrusion 123 provided on the second rotating member 120, gets over the inclined portion 123a, and FIG. As shown to (A), the press arm 104 returns to the initial state located in the inner peripheral side rather than the to-be-pressed protrusion 123. FIG.

  Further, when a small-diameter standard disc has been loaded, the loading detection is performed immediately after the disc clamp is released and the disc begins to move toward the insertion slot by the rotational force of the transport rollers 6A and 6B. The arm 94 rotates clockwise, and the trigger member 101 rotates counterclockwise. Therefore, as shown in FIG. 14, when the first rotating member 20 and the second rotating member 120 have finished rotating in the φ2 direction, the pressing arm 104 moves further to the inner peripheral side than the pressed protrusion 123. I can return. Even if the return is delayed, the pressing arm 104 can move over the pressed protrusion 123 and move to the inner peripheral side of the pressed protrusion 123.

  In this disk apparatus 1, when a large-diameter standard disk is inserted and loaded into the mechanism unit 2, the trigger member 101 is operated using the force of loading the disk D, as shown in FIG. As shown, the trigger member 101 rotates the second rotating member 120 to apply the rotational force of the small diameter gear portion 115 b to the first rotating member 20. On the other hand, when unloading the disc, the trigger member 101 cannot return to the original state immediately after the first rotating member 20 and the second rotating member 120 return to the original state. . Therefore, as in the above-described embodiment, the pressing arm 104 provided on the trigger member 101 is configured to be elastically deformable, and the second protrusion 120 and the trigger member 101 are moved over the pressed protrusion 123. It becomes possible to make up for the difference in operation timing.

It is a bottom view which shows the mechanism unit provided in the disc apparatus of the embodiment of the present invention with the bottom face toward the front side of the paper, and shows a disc insertion standby mode. (A) is a left side view of the mechanism unit, and (B) is a right side view of the mechanism unit, both showing an upper end upward. (A) (B) is a perspective view which shows the lower base which comprises an external chassis from different directions. The fragmentary sectional view which shows holding | maintenance operation | movement with a restraint recessed part and a convex part. The fragmentary perspective view which shows the contact state of the protrusion locking member provided in the X2 side of the mechanism unit, and a latching inclined surface, and shows a bottom part facing up. The partial perspective view which shows the contact state of the rotation-type protrusion locking member provided in the X1 side of the mechanism unit, and the right side board, and shows the bottom part upward. The partial perspective view which shows the state in which the drive base is falling with the bottom part facing up. The top view which shows the mechanism provided in the upper surface of the mechanism unit, and shows disc insertion standby mode. The top view which shows the mechanism provided in the upper surface of the mechanism unit, and shows the state in which the disk of the large diameter standard was positioned. The top view which shows the mechanism provided in the upper surface of the mechanism unit, and shows the middle of the large diameter disc being discharged. (A) is a perspective view showing the power switching mechanism provided in the mechanism unit with the bottom portion facing upward, and (B) is an exploded perspective view thereof. It is a top view which shows a power switching mechanism according to operation | movement, (A) shows a disk insertion standby mode, (B) shows the state which the disk was positioned on the turntable and the trigger member started. It is a top view which shows a power switching mechanism according to operation | movement, (A) shows the state in which power switching was completed, (B) shows the middle of discharge | ejecting of a disk. The top view which shows the operation | movement which a trigger member returns, and shows a power switching mechanism according to operation | movement. FIG. 2 is a bottom view similar to FIG. 1 and shows a mode in which loading of a disc is completed. FIG. 3 is a left side view similar to FIG. 2 (A), showing a mode in which loading of the disc is completed. FIG. 8 is a partial perspective view similar to FIG. 7, showing a state where the drive base is raised.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disc apparatus 2 Mechanism unit 3A Left side switching member 3B Right side switching member 4 Rotation drive part 5 Spindle motor 7 Lower base 7A Left side plate 7B Right side plate 8 Drive base 9 Clamp base 10 Top chassis 11 Clamper 12 Bottom chassis 20 First rotation Member 20a Drive protrusion 20b Connecting pin 20d Partial gear portion 20e Differential connecting hole 20f Spring storage portion 20g Connection recess 30 Link mechanism 31 Slider link 32 Reverse link 33 Projection lock member 35 Rotation lock members 61a, 62a, 64a, 65a Projection 61b, 64b, 65b Stepped portion 63a Locking inclined surface 66a Locking convex portion 70 Elastic support members 71, 72, 73, 74 Restraining concave portions 71a, 73a, 74a Peripheral raised portions 81 Detection arm 84 Locking member 87 Left positioning arm 87d Control Long hole 89 right position Female arm 91, 92 positioning projection 93 torsion spring 94 loading detection arm 95 fulcrum pin 96 moving pin 100 power switching mechanism 101 trigger member 101a metal arm 103 switching pin 104 pressing arm 115 driving gear 115a large diameter gear portion 115b small diameter gear portion 118 compression Coil spring 120 Second rotating member 120b Partial gear portion 120c Energizing protrusion 120d Connection pin 121 Connection long hole 121a Movement allowing part 121b Locking part 122 Intermittent member 123 Pressed protrusion 123a Inclined part 125 Control long hole 125a Connection guide part 125b Rotation restricting portion 126 Connecting protrusion

Claims (5)

A rotation drive unit (5) that holds the center hole of the disk (D), a conveyance mechanism (6A, 6B) that conveys the disk (D) toward the rotation drive unit (5), and a disk (D) A trigger member (101) that operates when the rotary drive unit (5) is carried to a position held by the rotary drive unit (5);
A switching member (3A, 3B) for clamping the center hole of the disk (D) to the rotation drive unit (5), and a power switching mechanism (100) for transmitting the power of the motor (M) to the switching member (3A, 3B) And is provided,
The power switching mechanism (100) includes a first moving member (20) having a first tooth portion (20d), a second moving member (120) having a second tooth portion (120b), and a motor. A drive member (115) which is operated in both forward and reverse directions with the power of (M) and has drive teeth (115b);
After the second moving member (120) is moved in the first direction (φ1) by the trigger member (101) and the second tooth portion (120b) is engaged with the driving tooth (115b), there is a delay. The first moving member (20) is moved in the first direction (φ1) and the first tooth portion (20d) is engaged with the drive teeth (115b). 20) and the second moving member (120) are connected by a connecting member (126),
When the driving member (115) is operated in the opposite direction, the first moving member (20) and the second moving member (120) are connected by the connecting member (126) and are second together. The second tooth portion (120b) is engaged with the driving tooth (115b) even after the first tooth portion (20d) is separated from the driving tooth (115b). , The first moving member (20) is moved in the second direction (φ2),
When the first moving member (20) moves in the first direction (φ1), the switching member (3A, 3B) is moved in the direction of clamping the disk, and the first moving member (20 ) Is moved in the second direction (φ2), the switching member (3A, 3B) is moved in a direction to release the disc clamp.   The first moving member (20) and the second moving member (120) move in the second direction (φ2), and the second tooth portion (120b) is disengaged from the driving tooth (115b). Later, there is provided a spring (118) for moving the second moving member (120) in the second direction (φ2) to separate the second tooth portion (120b) from the driving tooth (115b). The disk device according to claim 1. The connecting member (126) is movably supported by the first moving member (20), and the second moving member (120) has a locking portion (fitting with the connecting member (126)). 121b), and a chassis (12) that movably supports the first moving member (20) and the second moving member (120) controls the position of the connecting member (126). A control unit (125) is provided,
When the second moving member (120) moves in the first direction (φ1) and reaches the position where the second tooth portion (120b) meshes with the driving tooth (115b), the control portion ( 125), the connecting member (126) is hooked on the locking portion (121b) by the connecting guide portion (125a), and then the first moving member (20) is moved to the second moving member. 3. The disk device according to claim 1, wherein the disk device can be moved in the first direction (φ1) together with (120).   The control part (125) is formed with a restriction part (125b) for holding the connecting member (126), and the trigger member (101) causes the second moving member (120) to move in the first direction ( When moved to φ1), the connecting member (126) is held by the restricting portion (125b) to restrict the movement of the first moving member (20), and the second tooth portion (120b) is After meshing with the drive teeth (115b), the holding of the connecting member (126) by the restricting portion (125b) is released, and the first moving member (20) and the second moving member (120) are brought together. 4. The disk device according to claim 3, wherein the disk device can be moved in the first direction (φ1).   The first moving member (20) and the second moving member (120) are rotating members that rotate coaxially, and the intermittent member (122) swings around the second moving member (120) with the base as a fulcrum. The disk device according to claim 1, wherein the disk device is movably provided, and the connecting member is supported by the intermittent member.

Images