JP3557609B2 - Loading mechanism - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a loading mechanism for transferring a disk such as a CD, a CD-ROM, and a DVD to a position where the disk is rotationally driven.
[0002]
[Prior art]
Conventionally, a loading mechanism in a CD player for reproducing a CD which is a disc has a configuration in which a CD is transported to a front surface of a frame-shaped loading chassis made of resin as a fixing member, inserted into the loading chassis, and the CD is loaded from the loading chassis. A tray as a discharge conveying member is provided movably in the front-rear direction. A chucking unit having a magnet for chucking a CD is mounted on the upper surface of the loading chassis so as to be vertically movable.
[0003]
Further, a lift arm as an interlocking member is provided at a front portion in the loading chassis, and the left and right rear ends of the lift arm are pivotally supported by left and right side plates of the loading chassis so as to be rotatable. The portion is engaged with a transmission member such as a cam, and a rotational force is applied to the front end of the lift arm by the movement of the tray to move up and down.
[0004]
A drive chassis as a movable member is provided in the loading chassis, and a rear end of the drive chassis is rotatably supported by the loading chassis, and a front end thereof moves up and down. A motor is attached to the front end of the drive chassis, a turntable is fixed to the shaft of the motor and disposed below the chucking unit, and a metal chucking yoke is provided on the upper surface of the turntable. By the rotation of the drive chassis, the turntable is attracted to and detached from the chucking unit.
[0005]
Then, the chucking yoke is attracted to the magnet of the chucking unit by the upward movement of the turntable accompanying the rotation of the drive chassis, and the CD is held between the chucking unit and the turntable to perform chucking. On the other hand, due to the downward movement of the turntable accompanying the rotation of the drive chassis, the chucking yoke attracted by the magnet of the chucking unit is forcibly separated, and the holding state of the CD between the chucking unit and the turntable is released. Unchucking is performed.
[0006]
By the way, as described above, the chucking and unchucking of the CD are performed by moving the turntable up and down by the rotation of the drive chassis, but this is performed by locking the front end of the drive chassis and the lift arm. This is because the drive chassis is rotated by the vertical movement of the front end of the lift arm.
[0007]
Therefore, the front end of the lift arm moves upward with the rearward movement of the tray, and the front end of the drive chassis is moved upward by the upward movement of the front end of the lift arm, so that the front end of the tray moves forward. The front end of the lift arm moves down with the movement, and the front end of the drive chassis moves down due to the movement of the front end of the lift arm.
[0008]
[Problems to be solved by the invention]
However, in the case of the above-described conventional configuration, no cushioning member is provided at the position where the front end of the drive chassis and the lift arm are locked, and the rotation trajectory of the drive chassis and the rotation trajectory of the lift arm do not correspond to each other. Conventionally, play is provided at a pivot portion of the rear end of the lift arm to the loading chassis to absorb the displacement. Due to this play, a displacement occurs between the unchucking state and immediately before the completion of the chucking, so that the CD cannot be chucked accurately and the rotation of the CD may become unstable.
[0009]
In addition, as a disc loading mechanism, in addition to the above-described structure, there are, for example, those disclosed in Japanese Patent Publication No. 4-63457, Japanese Patent Application Laid-Open No. 8-77536, Japanese Patent Application Laid-Open No. 10-21619, and the like.
[0010]
An object of the present invention is to perform a chucking operation accurately and reliably, and to prevent rattling or the like upon completion of chucking.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention provides a transport member that is provided movably in a horizontal direction with respect to a fixed member and transports a disk to a chucking position inside the fixed member, and one end of the transport member. An interlocking member that is rotatably supported and has the other end pivoting up and down about this one end in conjunction with the movement of the transport member, and one end pivotally linked to the interlocking member and one end pivotally movable with the fixed member And a movable member whose other end pivots up and down about the one end by the rotation of the interlocking member, the center of rotation of the interlocking member being the center of rotation of the movable member. in the loading mechanism is positioned forward of the fixing member is a frame-shaped loading chassis chucking unit is attached, wherein the conveying member is a tray in which the disk is mounted, the interlocking portions Is a lift arm whose other end is rotated by movement of the tray, wherein the movable member is attracted to and detached from the chucking unit so as to hold the disc between the chucking unit and the turntable. and a motor for rotating the turntable a drive chassis attached to the other end portion which is the rotation-side, front and lift arm and is engaged with the lift arm by the buffer member of the drive chassis The drive chassis is rotated by the up and down movement of the front end of the drive chassis so that the front end moves up and down, and the cushioning member is attached to an outer cylindrical body attached to the drive chassis and inside the outer cylindrical body. An inner cylindrical body disposed and fixed to a lift arm; and a lower end and an upper end at an lower end edge of the outer cylindrical body and an upper end edge of the inner cylindrical body. Are formed separately and funnel-shaped vibration absorbers integrally provided on the two cylinders so as to absorb the deviation between the rotation locus of the drive chassis and the rotation locus of the lift arm. It is characterized by having.
[0012]
According to this configuration, the deviation of the rotation locus of the rotational locus and the lift arm drive chassis positional deviation of being absorbed lift arm is prevented by the cushioning member, the lift arm rear as in the prior art It is not necessary to provide play at the pivot portion to the loading chassis . For this reason, it is possible to prevent a displacement between the unchucking state and immediately before the completion of the chucking, and it is possible to chuck the disk with high positional accuracy, thereby obtaining a stable rotation of the disk.
[0013]
Further, it is possible to improve the positional accuracy when chucking a CD or the like, and it is possible to stably rotate the CD or the like, and to realize a loading mechanism suitable as a drive device for a disk such as a CD. it can.
[0014]
In the present invention, an elastic body interposed between the tray and the lift arm at the time of chucking is provided on the tray or the lift arm.
[0015]
With this configuration, the elastic body provided between the tray and the lift arm prevents chatter generated on the drive chassis side during chucking from being transmitted to the tray, thereby preventing generation of chatter noise.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
One embodiment in which the present invention is applied to a CD player will be described with reference to FIGS. However, FIG. 1 is a partial plan view, FIG. 2 is a right side view in a certain state, FIG. 3 is a right side view in a partially different state, and FIG. 4 is a sectional view of another part.
[0017]
1 to 3, reference numeral 1 denotes a chucking unit, which is vertically movably mounted on an upper surface of a frame-shaped loading chassis made of a resin (not shown). At this time, a dish-shaped holder having a U-shaped cross section is attached to the inside of the upper surface of the loading chassis at a position above the CD inserted into the loading chassis, and a circular opening formed at the center of the holder is provided. The chucking unit 1 is supported movably up and down.
[0018]
The chucking unit 1 includes a ring-shaped magnet, a resin guide body disposed in the opening of the holder and holding the magnet inside, and a disc-shaped magnet having a diameter larger than the diameter of the opening of the holder. And a disc-shaped metal holding plate attached to the guide body and holding the magnet.
[0019]
On the other hand, on the front surface of the loading chassis, a tray as a transport member for inserting a CD into the loading chassis and discharging the CD from the loading chassis is provided movably in the front-rear direction.
[0020]
Further, in FIGS. 1 to 3, reference numeral 2 denotes a substantially U-shaped lift arm as an interlocking member disposed at a front portion in the loading chassis. The protrusions 2a and 2b are rotatably fitted into concave portions of both right and left side plates (not shown) of the loading chassis, and two projecting guides 2c and 2d formed at the front end of the lift arm 2 are cams. And the like, whereby the front end portion of the lift arm 2 is given a rotating power by the above-described forward and backward movement of the tray, so as to move up and down.
[0021]
In FIGS. 1 to 3, reference numeral 3 denotes a substantially rectangular drive chassis as a movable member disposed in the loading chassis, and a rear end of the drive chassis 3 is made of rubber or the like. 4, the front end of the drive chassis 3 and the lift arm 2 are engaged at two places by a buffer member 5 made of rubber or the like, and the drive arm is driven by the vertical movement of the front end of the lift arm 2. The chassis 3 rotates so that its front end moves up and down.
[0022]
At this time, at the time of chucking and unchucking of the CD, in particular, two intersections P1 and P2 at which the turning locus circle S1 of the drive chassis 3 and the turning locus circle S2 of the lift arm 2 shown in FIG. The two cushioning members 5 are disposed so as to be located in the vicinity including the same. Further, as shown in FIG. 1, both the positions of the protrusions 2a and 2b, which are the support positions of the lift arm 2 to the loading chassis, and the two guides, which are the operation positions where the turning force by the movement of the tray of the lift arm 2 acts. Both buffer members 5 are arranged near lines L1 and L2 connecting the positions of the bodies 2c and 2d, respectively.
[0023]
By the way, these buffer members 4 and 5 have the same configuration, and the configuration will be described by taking the buffer member 5 as an example. As shown in FIG. 4, an outer cylindrical body 5a is disposed inside the outer cylindrical body 5a. The inner cylindrical body 5b, a funnel-shaped body integrally provided on the two cylindrical bodies 5a, 5b with both ends joined to the lower end side edge of the outer cylindrical body 5a and the upper end side edge of the inner cylindrical body 5b, respectively. It is constituted by the vibration absorber 5c.
[0024]
Then, as shown in FIG. 4, an inner cylindrical body 5b is externally fitted to a boss 2e formed on the lift arm 2, and is fixed by a screw 6 with a washer 6a. Further, a circumferential groove 5d is formed on the outer periphery of the outer cylindrical body of each buffer member 5, and circular holes 3a are formed at the left and right front ends of the drive chassis, respectively. The outer cylindrical bodies 5a of both buffer members 5 are attached to the drive chassis 3 by fitting the drive chassis 3 around the circular hole 3a into the groove 5d of 5a. On the other hand, in the cushioning member 4, similarly, the inner cylindrical body is externally fitted to a boss formed on the loading chassis and is fixed by a screw with a washer, and the drive chassis 3 is inserted into a groove of the outer cylindrical body of the cushioning member 4. The drive chassis 3 around the periphery of the circular hole formed at the rear end is fitted and the outer cylindrical body of the cushioning member 4 is attached to the drive chassis 3.
[0025]
As shown in FIGS. 2 and 3, a motor 8 is attached to the front end of the drive chassis 3, and a turntable 9 is fixed to a shaft of the motor 8 so that the turntable 9 is located below the chucking unit 1. It is arranged in. A metal ring-shaped chucking yoke is embedded in the circular groove formed on the upper surface of the turntable 9 with its upper surface exposed, and the chucking yoke is rotated by the rotation of the drive chassis 3. The turntable 9 is attracted to the magnet of the chucking unit 1 so as to be freely attached to and detached from the chucking unit 1.
[0026]
Further, as shown in FIG. 1, a sponge piece 11 which is an elastic body which comes into contact with the lower surface of the tray at the time of chucking is attached to the upper surface of the left and right ends of the lift arm 2. At this time, the sponge piece 11 does not come into contact with the tray at the time of unchucking, and is interposed in a contact state between the tray and the lift arm 2 only at the time of chucking.
[0027]
The chucking yoke is attracted to the magnet of the chucking unit 1 by the upward movement of the turntable 9 accompanying the rotation of the drive chassis, and the CD is held between the chucking unit 1 and the turntable 9 to chuck. Is performed. On the other hand, due to the downward movement of the turntable 9 accompanying the rotation of the drive chassis 3, the chucking yoke attracted by the magnet of the chucking unit 1 is forcibly separated, and the CD of the CD by the chucking unit 1 and the turntable 9 is moved. The holding state is released and the unchucking is performed.
[0028]
In this manner, during chucking and unchucking, two points P1 and P2 where the rotation trajectory circle S1 of the drive chassis 3 intersects with the rotation trajectory circle S2 of the lift arm 2 and the vicinity thereof are located at the intersections P1 and P2. Since the cushioning members 5 are provided, there is no need to provide a play at the pivot portion of the rear end of the lift arm to the loading chassis as in the related art, and the displacement between the unchucking state and immediately before the completion of the chucking ( Rattling) can be prevented, and the disk can be chucked with high positional accuracy.
[0029]
Further, the positions of the two projections 2a and 2b, which are the support positions of the lift arm 2 to the loading chassis, and the two guide bodies 2c, 2d, which are the operation positions where the turning force by the movement of the tray of the lift arm 2 acts, are respectively provided. Since both buffer members 5 are provided near the connecting lines L1 and L2, it is possible to prevent the occurrence of a rotational moment in the lift arm as in the related art.
[0030]
Therefore, according to the above-described embodiment, the position accuracy of chucking can be improved, the CD can be rotated stably, and the chucking operation can be performed accurately and reliably. It is also possible to prevent rattling or the like upon completion of chucking.
[0031]
In addition, the sponge piece 11 provided on the lift arm 2 can reliably prevent the micro vibration (chatter) generated on the drive chassis 3 side during chucking from being transmitted to the tray, thereby preventing the generation of so-called chatter noise. it can.
[0032]
In the above-described embodiment, the buffer member 5 that links the lift arm 2 that is an interlocking member and the drive chassis 3 that is a movable member has a structure including an outer cylindrical body, an inner cylindrical body, and a vibration absorber. Although the case where the shock absorbing member is used has been described, the shock absorbing member is not limited to this. In short, any shock absorbing member may be used as long as it can absorb shock and suppress transmission of shock from one member to the other member.
[0033]
Further, in the above-described embodiment, the case where the sponge piece 11 as an elastic body is attached to the upper surface of the lift arm 2 has been described, but it goes without saying that the sponge piece 11 may be provided on the lower surface of the tray. The elastic body at this time is not limited to the sponge piece described above, and may be rubber, a leaf spring, or the like.
[0034]
Further, in the above-described embodiment, the case where the present invention is applied to the loading mechanism of the CD player has been described. However, the present invention can naturally be applied to the loading mechanism of other disk recording / reproducing apparatuses other than the CD player. It is.
[0035]
Further, the present invention is not limited to the above-described embodiment, and various changes other than those described above can be made without departing from the gist of the present invention.
[0036]
【The invention's effect】
As described above, according to the first aspect of the present invention, it is possible to prevent displacement (including rattling) from the unchucking state to immediately before the completion of chucking, and chuck the disc with high positional accuracy. This makes it possible to provide a loading mechanism that can rotate the disc stably and perform the chucking operation accurately and reliably.
[0037]
Further , it is possible to improve the positional accuracy at the time of chucking a CD or the like, and to stably rotate a CD or the like, thereby realizing a loading mechanism suitable as a drive device for a disk such as a CD. Can be.
[0038]
According to the second aspect of the present invention, the elastic body provided between the tray and the lift arm does not transmit the minute vibration (chatter) generated on the drive chassis side at the time of chucking to the tray, and the chatter sound. Can be prevented.
[Brief description of the drawings]
FIG. 1 is a partial plan view of an embodiment of the present invention.
FIG. 2 is a right side view showing a state of a part of the embodiment;
FIG. 3 is a right side view in a partially different state of the embodiment.
FIG. 4 is a cross-sectional view of another portion of one embodiment.
[Explanation of symbols]
1 chucking unit 2 lift arm (interlocking member)
2a, 2b Projection 2c, 2d Guide 3 Drive chassis (movable member)
4, 5 cushioning member 11 sponge piece (elastic member)

Claims (2)

A transport member that is provided movably in the horizontal direction with respect to the fixed member and transports the disk to a chucking position inside the fixed member; and one end is rotatably supported by the fixed member and interlocks with the movement of the transport member And an interlocking member having the other end pivoting up and down about the one end, and an end coupled to the interlocking member and one end rotatably supported by the fixed member, and rotating the interlocking member to form the one end. A movable member, the other end of which pivots up and down with respect to the side , wherein the center of rotation of the interlocking member is located forward of the center of rotation of the movable member ,
The fixing member is a frame-shaped loading chassis to which a chucking unit is attached, the transport member is a tray on which the disc is placed, and the other end of the interlocking member is rotated by the movement of the tray. A lift table, wherein the movable member is attracted to and detached from the chucking unit so that the disk is held between the chuck and the chucking unit, and a motor that rotates the turntable rotates the turntable. A drive chassis attached to the other end that is the side,
The front end of the drive chassis and the lift arm are engaged by a cushioning member, and the drive chassis is rotated by the vertical movement of the front end of the lift arm, so that the front end moves up and down,
An outer cylindrical body attached to a drive chassis, an inner cylindrical body disposed inside the outer cylindrical body and fixed to a lift arm, a lower end edge of the outer cylindrical body, and an inner cylindrical body; The lower end and the upper end are separately joined to the upper end side edge of the drive body, and are constituted by a funnel-shaped vibration absorber integrally provided on both cylinders, so that the rotation locus of the drive chassis and the rotation of the lift arm A loading mechanism characterized by absorbing a deviation from a trajectory . The loading mechanism according to claim 1 , wherein an elastic body interposed between the tray and the lift arm during chucking is provided on the tray or the lift arm.

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