JP3723978B2 - Loading mechanism - Google Patents

Description

  The present invention relates to a loading mechanism for transferring a disk such as a CD, a CD-ROM, or a DVD to a position for rotational driving.

  2. Description of the Related Art Conventionally, a loading mechanism in a CD player that plays a CD, which is a disc, transports a CD to the front surface of a frame-shaped loading chassis made of resin as a fixing member, and inserts the CD into the loading chassis. A tray as a discharging conveying member is provided to be movable in the front-rear direction. A chucking unit including a magnet for chucking a CD is attached to the upper surface of the loading chassis so as to be movable up and down.

  Further, a lift arm as an interlocking member is disposed in the front portion of the loading chassis, and the left and right rear ends of the lift arm are pivotally supported by the left and right side plates of the loading chassis so that the front end can be rotated. The portion engages with a transmission member such as a cam, and the moving force is applied to the front end portion of the lift arm by the movement of the tray to move up and down.

  In addition, a drive chassis as a movable member is disposed in the loading chassis, and a rear end portion of the drive chassis is rotatably supported by the loading chassis and its front end portion moves up and down. A motor is attached to the front end of the drive chassis, and a turntable is fixed to the motor shaft and disposed below the chucking unit. A metal chucking yoke is provided on the upper surface of the turntable. By turning the drive chassis, the turntable is adsorbed to the chucking unit so as to be freely contacted and separated.

  Then, due to the upward movement of the turntable accompanying the rotation of the drive chassis, the chucking yoke is attracted by the magnet of the chucking unit, and the CD is sandwiched between the chucking unit and the turntable to perform chucking. On the other hand, the lowering of the turntable accompanying the rotation of the drive chassis forcibly separates the chucking yoke attracted by the magnet of the chucking unit, and the chucking state of the CD between the chucking unit and the turntable is released. Unchucking is performed.

  By the way, as described above, the CD is chucked and unchucked by moving the turntable up and down by the rotation of the drive chassis. This is because the front end of the drive chassis and the lift arm are locked. This is because the drive chassis is rotated by the vertical movement of the front end portion of the lift arm.

  Therefore, as the tray moves rearward, the front end of the lift arm moves up, and the front end of the drive chassis is pushed up by the upward movement of the front end of the lift arm. Along with the movement, the front end portion of the lift arm moves downward, and the front end portion of the drive chassis moves downward due to the downward movement of the front end portion of the lift arm.

In addition to the above-described configuration, there are known disk loading mechanisms (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3).
Japanese Examined Patent Publication No. 4-63457 JP-A-8-77536 Japanese Patent Laid-Open No. 10-21619

  However, in the case of the conventional configuration described above, the locking position between the front end portion of the drive chassis and the lift arm is given the pivot point to the loading chassis at the rear end of the lift arm and the turning force to the front end portion of the lift arm. Since it is not located on the straight line connecting the points, a rotational moment with this straight line as the axis is generated in the lift arm between the unchucked state and immediately before the chucking is completed, and this rotational moment is caused by the CD chucking. It is also one of the factors that reduce the position accuracy. At this time, as the locking position between the front end of the drive chassis and the lift arm is further away from the axis, the rotational moment increases, and even after the chucking is completed, the drive chassis may wobble, resulting in unstable chucking. .

  The problem to be solved by the present invention is to prevent rattling and the like when chucking is completed.

  In order to solve the above-described problems, the present invention provides a transport member that is provided so as to be movable 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 portion of the fixed member. An interlocking member that is supported rotatably and interlocks with the movement of the transport member, and the other end pivots up and down around the one end, and one end linked to the interlocking member is pivotable to the fixed member. And a movable member whose other end is rotated up and down around the one end side by the rotation of the interlocking member. The fixed member is a frame-shaped loading chassis to which a chucking unit is attached. The transport member is a tray on which the disk is placed, the interlocking member is a lift arm whose other end is rotated by movement of the tray, and the movable member is the cha A drive table that is attached to the other end on the rotating side of a turntable that holds the disk between the chucking unit by being adsorbed to and separated from the king unit and a motor that rotationally drives the turntable In the loading mechanism, a rear end portion of the drive chassis is rotatably supported by the loading chassis by a cushioning member made of rubber, and the front end portion of the drive chassis and the lift arm are made of rubber at two locations. The drive chassis is rotated by the vertical movement of the front end portion of the lift arm and the front end portion thereof is moved up and down, and the front end portion of the drive chassis, the lift arm, The buffer member connecting the two at two locations is the load arm of the lift arm. A support position of the ring chassis, moved by rotational force of the tray of the lift arm is characterized in that it is arranged on a line or near the line connecting the operating position acts.

  According to such a configuration, in addition to the rear end portion of the drive chassis being rotatably supported by the loading chassis by the rubber cushioning member, the front end portion of the drive chassis and the lift arm are The drive chassis is engaged by rubber cushioning members at two locations, 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. And a buffer member connecting the lift arm at two locations on a line connecting a support position of the lift arm to the loading chassis and an action position where the rotational force of the lift arm by the movement of the tray acts Or, by arranging it in the vicinity, the rotational moment is applied to the interlocking member (lift arm) as before. Not occur, it is possible to prevent deterioration of the positional accuracy of the chucking.

  Further, it is possible to improve the position accuracy when chucking a CD or the like, it becomes possible to rotate the CD or the like stably, and it is possible to realize a loading mechanism suitable as a drive device for a disk such as a CD. it can.

  As described above, according to the present invention, it is possible to prevent a rotational moment from being generated in the interlocking member as in the prior art, and it is possible to prevent a decrease in the position accuracy of chucking. In addition, a loading mechanism suitable as a drive device for a disk such as a CD can be realized.

  An 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 different state, and FIG. 4 is another partial cross-sectional view.

  1 to 3, reference numeral 1 denotes a chucking unit, which is attached to the upper surface of a frame-shaped loading chassis made of resin as a fixing member (not shown) so as to be movable up and down. 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 attached. The chucking unit 1 is supported so as to be movable up and down.

  Further, the chucking unit 1 includes a ring-shaped magnet, a resin-made guide body that is disposed in the opening of the holder and holds the magnet inside, and a disk-like shape that is larger in diameter than the opening of the holder. And a disc-shaped metal presser plate that is attached to the guide body and presses the magnet.

  On the other hand, on the front surface of the loading chassis, a tray as a conveying member for inserting a CD into the loading chassis and ejecting the CD from the loading chassis is provided movably in the front-rear direction.

  Further, in FIGS. 1 to 3, reference numeral 2 denotes a substantially U-shaped lift arm as an interlocking member disposed at the front portion in the loading chassis. The lift arms 2 are formed at the left and right rear ends of the lift arm 2. The protrusions 2a and 2b are rotatably fitted in the recesses of the left and right side plates (not shown) of the loading chassis, and the two protruding guide bodies 2c and 2d formed at the front end of the lift arm 2 are cams. This is engaged with a transmission member (not shown) such as the above, whereby the front end of the lift arm 2 is given a turning force by the movement of the tray in the front-rear direction and moves up and down.

  1 to 3, reference numeral 3 denotes a drive chassis having a substantially rectangular shape in plan view as a movable member disposed in the loading chassis, and a rear end portion of the drive chassis 3 is a buffer member 4 made of rubber. The front end of the drive chassis 3 and the lift arm 2 are engaged with each other by two cushioning members 5 made of rubber, and the front end of the lift arm 2 is moved up and down to drive the drive chassis 3. Is rotated so that its front end moves up and down.

  At this time, at the time of CD chucking and unchucking, as shown in FIG. 2 in particular, two intersections where the rotation locus circle S1 of the drive chassis 3 and the rotation locus circle S2 of the lift arm 2 intersect each other. Both shock-absorbing members 5 are arranged so as to be located at P1, P2 and the vicinity including them. Further, as shown in FIG. 1, both the positions of the protrusions 2 a and 2 b which are the positions where the lift arm 2 is supported by the loading chassis, and both guides which are the working positions where the rotational force by the movement of the tray of the lift arm 2 acts. Both buffer members 5 are arranged in the vicinity of lines L1 and L2 connecting the positions of the bodies 2c and 2d.

  By the way, the buffer members 4 and 5 have the same configuration, and the configuration of the buffer member 5 will be described as an example. As shown in FIG. 4, the outer cylinder body 5a and the inner side of the outer cylinder body 5a are arranged. The inner cylindrical body 5b, the lower end side edge of the outer cylindrical body 5a and the upper end side edge of the inner cylindrical body 5b are joined to both ends, respectively, and are formed in a funnel-like shape integrally provided on both the cylindrical bodies 5a and 5b. It is comprised by the vibration absorber 5c.

  And as shown in FIG. 4, the inner side cylinder 5b is externally fitted by the boss | hub 2e formed in the lift arm 2, and is fixed with the screw 6 with the 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 on the left and right front ends of the drive chassis, respectively. The outer cylindrical body 5a of both buffer members 5 is 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 buffer member 4, similarly, the inner cylindrical body is externally fitted to a boss formed in the loading chassis and fixed by a screw with a washer or the like, and the drive chassis 3 is inserted into the groove of the outer cylindrical body of the buffer member 4. The drive chassis 3 around the periphery of the circular hole formed in the rear end portion is fitted and the outer cylindrical body of the buffer member 4 is attached to the drive chassis 3.

  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 the shaft of the motor 8 so that the turntable 9 is located below the chucking unit 1. It is arranged. A metal ring-shaped chucking yoke is embedded in the circular groove formed on the upper surface of the turntable 9 so that the upper surface is exposed. The turntable 9 is attracted by the magnet of the chucking unit 1 so as to be attracted to and separated from the chucking unit 1.

  Further, as shown in FIG. 1, sponge pieces 11, which are elastic bodies that come into contact with the lower surface of the tray during chucking, are attached to the upper surfaces of the left and right end portions of the lift arm 2. At this time, the sponge piece 11 does not come into contact with the tray during unchucking, and is interposed between the tray and the lift arm 2 only during chucking.

  As the drive chassis rotates, the turntable 9 moves upward and the chucking yoke is attracted to the magnet of the chucking unit 1, and the CD is sandwiched between the chucking unit 1 and the turntable 9 for chucking. Is done. On the other hand, the lowering of the turntable 9 accompanying the rotation of the drive chassis 3 forcibly separates the chucking yoke attracted by the magnet of the chucking unit 1, and the CD of the chucking unit 1 and the turntable 9 is separated. The nipping state is released and unchucking is performed.

  In this way, the chuck 2 and the chuck 2 are positioned at the intersections P1 and P2 where the rotation trajectory circle S1 of the drive chassis 3 and the rotation trajectory circle S2 of the lift arm 2 intersect each other at the time of chucking and unchucking. Since the buffer members 5 are arranged, it is not necessary to provide play in the pivotal support portion of the rear end of the lift arm to the loading chassis as in the conventional case, and the position shift between the unchucked state and immediately before the completion of chucking ( (Including rattling) can be prevented, and the disk can be chucked with high positional accuracy.

  Further, the positions of both protrusions 2a, 2b, which are the positions where the lift arm 2 is supported by the loading chassis, and the guide bodies 2c, 2d, which are the working positions where the rotational force is generated by the movement of the tray of the lift arm 2, respectively. Since both the buffer members 5 are disposed in the vicinity of the connecting lines L1 and L2, it is possible to prevent a rotational moment from being generated in the lift arm as in the prior art.

  Therefore, according to the above-described embodiment, the position accuracy of chucking can be improved, the CD can be stably rotated, and the chucking operation can be performed accurately and reliably. It is also possible to prevent rattling and the like at the completion of chucking.

  Further, the sponge piece 11 provided on the lift arm 2 can surely prevent the minute vibration (chatter) generated on the drive chassis 3 side during chucking from being transmitted to the tray, and so-called chatter noise can be prevented. it can.

  In the embodiment described above, in particular, 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 configuration including an outer cylindrical body, an inner cylindrical body, and a vibration absorber. Although the case where it used was demonstrated, a buffer member is not limited to this, In short, what is necessary is just to absorb an impact and to suppress the transmission of the impact from one member to the other member.

  In the above-described embodiment, the case where the sponge piece 11 as the elastic body is provided by being attached to the upper surface of the lift arm 2 has been described, but it is needless to say 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 above-described sponge piece, and may be rubber, a leaf spring, or the like.

  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 disc recording / reproducing apparatuses other than the CD player. It is.

The present invention is not limited to the above-described embodiment, and various modifications other than those described above can be made without departing from the spirit of the present invention.

It is a partial top view of one Embodiment of this invention. It is a right view in a state with a part of one embodiment. It is a right view in a part of different state of one embodiment. It is sectional drawing of the other part of one Embodiment.

Explanation of symbols

1 Chucking unit 2 Lift arm (interlocking member)
3 Drive chassis (movable member)
4,5 cushioning member

Claims (1)

A conveying member that is provided so as to be movable in a horizontal direction with respect to the fixed member, and that conveys the disk to a chucking position inside the fixed member, and one end portion is rotatably supported by the fixed member, and interlocks with the movement of the conveying member. An interlocking member whose other end is pivoted up and down around the one end, and one end linked to the interlocking member is rotatably supported by the fixing member. A movable member whose other end rotates up and down around the side,
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 disk is placed, and the interlocking member has other end portions by movement of the tray. A turn arm that is rotated, and the movable member is attached to and separated from the chucking unit so that the disk is sandwiched between the turntable and a motor that rotationally drives the turntable. In the loading mechanism which is a drive chassis attached to the other end which is the rotation side,
The rear end of the drive chassis is rotatably supported by the loading chassis by a rubber shock absorber, and the front end of the drive chassis and the lift arm are engaged by rubber shock absorbers at two locations. 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.
The cushioning member that connects the front end of the drive chassis and the lift arm at two locations acts as a support position of the lift arm to the loading chassis, and a rotational force by the movement of the tray of the lift arm. A loading mechanism which is disposed on or near a line connecting the operating position.

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