JP2009087392A - Optical disc apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent members from being deformed when impact acts while maintaining space saving and low cost; to prevent the omission of the members; and to improve impact resistance performance. <P>SOLUTION: This optical disc apparatus includes a main frame, a medium drive unit, and an ascent/descent retaining member 24 which supports the medium drive unit freely for ascent and descent, and a slide member which has a cam that is engaged with the ascent/descent retaining member to make the ascent/descent retaining member ascend/descend in accordance with movement. The ascent/descent retaining member includes a pair of arm portions 24a and 24b, a connecting portion 24c extending between one end parts of the arm portions and facing a front wall, and pivotal portions 23a and 23b provided at the other end parts of the arms and supported on the sidewalls, an engaging pin 26a projecting from the connection portion toward the front wall to be engaged with the cam, and a hook 27 for keeping the engaging pin and the slide member into engaged state by engaging with the slide member when the ascent/descent retaining member formed in the engaging pin is moved to an ascent position. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an optical disc apparatus that performs information processing on a disc-shaped recording medium.

  In recent years, as a disk-shaped recording medium, a reproduction-only type typified by DVD-ROM, a once-recording type typified by DVD-R, a DVD-RAM usable for an external memory of a computer and recording / playback video, and Optical discs such as rewritable types represented by DVD-RW are widely used.

  An optical disc apparatus that records information on an optical disc or reproduces information from an optical disc includes a housing having a disc insertion slot, and a disc tray that supports the optical disc and loads and ejects the optical disc to and from the housing. ing. The disk tray is provided so as to be movable between a pull-out position where the optical disk can be loaded and unloaded and a drive position where the optical disk can be driven into the housing.

A motor for supporting and rotating the loaded optical disk, an optical pickup for reading and writing information on the optical disk, and the like are disposed in the housing. The motor and the pickup are provided on the traverse chassis. A boss that functions as a pivot is provided at one end of the traverse chassis, and the boss is rotatably supported in the casing by the boss. A cam pin is provided upright at the other end of the traverse chassis. The cam pin is engaged with a cam groove of a cam member that is slidably provided on the housing. Then, by reciprocating the cam member, the traverse chassis is rotated between the lowered position and the raised position around the boss (for example, see Patent Document 1).
While the disc tray moves, the traverse chassis is retracted to the lowered position, and when the optical disc is drawn into a predetermined drive position, the traverse chassis is rotated upward. As a result, the motor rises to clamp the disk, and the optical pickup faces the recording surface of the optical disk.

In the optical disk apparatus as described above, a large impact acts when dropped, for example, when the traverse chassis is deformed, the engagement between each member and the housing or the other members is disengaged, resulting in malfunction. May occur. Therefore, even when an impact is received, it is necessary to prevent misalignment, disengagement, damage, and the like of the member and improve reliability.
Therefore, in the optical disc apparatus, a protrusion is formed in the vicinity of the tip of the boss of the traverse chassis to prevent the boss from falling off the casing.
JP 2004-164721 A

  However, when the traverse chassis is deformed due to an impact or load, the cam pins of the traverse chassis may fall off from the cam member, and the traverse chassis may not be able to move up and down. Further, when the cam pin falls off from the cam member, the cam member or the cam pin is damaged. In order to prevent such deformation of the traverse chassis, it is possible to reinforce by increasing the thickness of the member, etc., and to increase the engagement length between the cam pin and the cam member. Thus, the apparatus becomes large and the manufacturing cost increases.

  The present invention has been made in view of the above points. The object of the present invention is to prevent deformation of a component member when an impact is applied and to prevent a component member from falling off while maintaining space saving and low cost. An object of the present invention is to provide an optical disc apparatus with improved impact performance.

An optical disk device according to an aspect of the present invention is directed to a main frame having a pair of opposed side walls and a front wall extending between the side walls, a motor for supporting and rotating a disk-shaped recording medium, and a recording medium A medium drive unit that includes a head unit that performs information processing, and is provided so as to be movable up and down between a drive position for driving the recording medium and a retracted position for allowing loading and unloading of the recording medium, An elevating holding member supported by the main frame that supports the medium driving unit and is movable up and down between a raised position corresponding to the driving position and a lowered position corresponding to the retracted position, and the front wall A sliding member that is movably provided and has a cam engaged with the lifting and lowering holding member, and lifts and lowers the lifting and lowering holding member according to the movement,
The elevating and holding member is provided at a pair of arm portions extending opposite to the side walls, a connecting portion extending between one end portions of the arm portions and facing the front wall, and the other end portion of the arms. A fulcrum portion supported by the side wall, an engagement pin protruding from the coupling portion toward the front wall side and engaged with the cam, and when the elevating holding member formed on the engagement pin moves to the raised position And a hook that engages with the sliding member to maintain the engaging pin and the sliding member in an engaged state.

  According to an aspect of the present invention, an optical disc apparatus having improved impact resistance performance that can prevent deformation of a constituent member when an impact is applied, prevent the constituent member from dropping, while maintaining space saving and low cost is provided. can do.

Hereinafter, an optical disc device according to an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an external structure of an optical disk apparatus with the top cover of the optical disk apparatus according to the present embodiment removed, and FIG. 2 shows an internal structure of the optical disk apparatus with a disk tray to be described later omitted. FIG. 3 shows a main frame of the optical disc apparatus.

  As shown in FIGS. 1 and 2, the optical disk apparatus includes a rectangular box-shaped main frame 11 having an open upper surface constituting a housing. In the main frame 11, there are a disc tray 20 that holds and conveys the optical disc 8 as a recording medium, a disc drive unit 22 that can move up and down to support and rotate the optical disc, and a moving mechanism 50 that moves the disc tray and disc drive unit. Is provided. On the bottom surface of the main frame 11, a circuit board (not shown) constituting the control unit is mounted.

  As shown in FIGS. 2 and 3, the main frame 11 is integrally provided with a pair of side walls 11a and 11b facing each other in parallel with a space therebetween, and a rear wall 11c and a front wall portion 11d extending between the side walls. , Formed of synthetic resin such as ABS. Engagement recesses 15a and 15b are formed on the inner surfaces of the pair of side walls 11a and 11b to rotatably support a fulcrum portion of a chassis mount 24 described later. A pair of support posts 12 that support the disk drive unit 22 are provided at two corners located inside the rear wall 11 c of the main frame 11.

  The front wall portion 11d extends between the front end portions of the side walls 11a and 11b and faces the rear wall 11c substantially in parallel. A disc insertion slot 14 having a rectangular opening is formed in the front wall portion 11d. Further, the front wall portion 11 constitutes an attachment portion to which the moving mechanism 50 is attached. That is, the front wall portion 11d is formed with a gear fulcrum boss 13a, a pulley gear fulcrum boss 13b, a motor attachment portion 13c, and a slide groove 13d that supports a cam slider described later in a movable manner.

  FIG. 4 shows the back side of the disc tray 20 that functions as a recording medium holder and the engaged state between the moving mechanism 50 and the disc tray. FIG. 5A is a cross-sectional view of the optical disc apparatus showing a state in which the disc tray is pulled into the operating position, and FIG. 5B is a cross-sectional view of the optical disc apparatus showing a state in which the disc tray is moved to the loading / unloading position. is there.

  As shown in FIGS. 1 and 4, the disc tray 20 is formed in a substantially rectangular plate shape, and a window portion 21 that allows the disc drive unit 22 to access the optical disc 8 is formed in a part of the disc tray 20. The disc tray 20 is disposed between the side walls 11a and 11b, and is supported so as to be movable along a direction parallel to the side walls, that is, along the longitudinal direction (movement direction A) of the main frame 11. A rack 23 is formed on the back surface of the disk tray 20 and extends over almost the entire length of the disk tray in the longitudinal direction. The rack 23 meshes with a tray gear 56a of the moving mechanism 50 described later.

  The disc tray 20 is drawn into a predetermined position in the main frame 11 as shown in FIG. 5A and FIG. 1 and is supported so as to be linearly movable between the loading and unloading positions indicated by the two-dot chain line in FIG. 1, and is moved between these operating positions and the loading and unloading positions by the moving mechanism 50. In the operating position, the disc tray 20 is positioned above the disc drive unit 22, and the optical disc 8 held on the disc tray 20 can be driven by the disc drive unit 22. At the loading / unloading position, the optical disk 8 can be loaded and unloaded from the disk tray 20.

  FIG. 6 is an exploded perspective view showing the disk drive unit 22, the moving mechanism 50, and the chassis mount 24 of the optical disk apparatus, and FIGS. 7 and 8 show the chassis mount, respectively.

  As shown in FIGS. 2, 3, 6, and 7, the main frame 11 is provided with a chassis mount 24 that supports the disk drive unit 22 to be movable up and down. The chassis mount 24 is formed in a substantially U shape and is rotatably attached to the main frame 11. The chassis mount 24 that functions as an elevating and holding member extends between a pair of arm portions 24a and 24b facing each other in parallel with a space therebetween, and one end portion of the arm portion orthogonal to the arm portion, and at the tip of the arm portion It has the connection part 24c which connected mutually.

  At the rear ends of the arm portions 24a and 24b, pivots 23a and 23b, which respectively serve as pivot fulcrums, are formed and project outward from the arm portions. A pair of support posts 25 for supporting the disk drive unit 22 are provided inside each corner of the chassis mount 24. The chassis mount 24 has a pair of engagement pins 26 a and 26 b that engage with a slide cam (described later) of the moving mechanism 50. These engaging pins 26a and 26b protrude forward from the central portion of the connecting portion 24c and are spaced apart from each other along the extending direction of the connecting portion.

  As shown in FIGS. 7 and 8, a hook 27 is formed integrally with at least one of the pair of engagement pins 26a and 26b, here, the engagement pin 26a. The hook 27 extends outward in the radial direction from the extending end of the engaging pin 26a. Further, the hook 27 is provided to be inclined at an angle corresponding to an inclined cam portion (inclined groove portion) of a cam slider described later.

  The chassis mount 24 integrally has a guide boss 29 and a pressing protrusion 30 formed on the connecting portion 24c. The guide boss 29 and the pressing protrusion 30 engage with a guide groove and a guide rib provided on the main frame side when the chassis mount 24 is moved to a raised position, which will be described later, to prevent rattling and vibration of the chassis mount. The guide boss 29 has sufficient strength not to be damaged even when it receives a drop impact load.

  The chassis mount 24 including the engagement pins 26 a and 26 b, the guide boss 29, and the pressing protrusion 30 is integrally formed of, for example, a resin harder than the main frame 11.

  As shown in FIG. 2, the chassis mount 24 is in a state in which the pivots 23a and 23b are rotatably engaged with engagement recesses 15a and 15b provided on the side walls 11a and 11b of the main frame 11, respectively. It is attached to the frame. The pair of arm portions 24a and 24b extend in parallel with the side walls 11a and 11b, respectively. The connecting portion 24c is located on the disc insertion opening 14 side with respect to the pivots 23a and 23b, extends between the side walls 11a and 11b in a direction perpendicular to the side walls, and has a gap with the front wall portion 11d of the main frame 11. Facing each other. The chassis mount 24 is supported so as to be rotatable between the raised position and the lowered position around the pivots 23a and 23b, and the connecting portion 24c is rotated between the raised position and the lowered position of the chassis mount 24. As you go up and down.

  As shown in FIGS. 2 and 6, the disk drive unit 22 has a rectangular frame-shaped chassis 28 formed of a metal plate. A spindle motor 32 as a drive source is attached to the front end of the chassis 28 in the longitudinal direction. A turntable 33 that supports the optical disk 8 and rotates at a predetermined speed is fixed to the rotation shaft of the spindle motor. . A pair of guide rails 34 extending in parallel with each other are attached to the chassis 28. The guide rail 34 extends slightly inclined with respect to the side walls 11 a and 11 b of the main frame 11.

  The disk drive unit 22 includes an optical pickup 36 that writes information to and reads information from the optical disk 8, and a pickup drive mechanism 37 that moves the optical pickup. The optical pickup 36 is supported by a pair of guide rails 34 so as to reciprocate along these guide rails. The pickup drive mechanism 37 has a feed motor 38 mounted on the chassis 28 and a lead screw 39 connected to the rotation shaft of the feed motor. The lead screw 39 extends in parallel with the guide rail 34 and engages with the optical pickup 36.

  The optical pickup 36 functioning as a head unit is positioned opposite to the information recording surface of the optical disk 8 supported on the turntable 33 when reading information from and writing information to the optical disk 8. It is moved along the guide rail 34 in the radial direction of the optical disk.

  The two corners on one end side (rear end side) in the longitudinal direction of the chassis 28 are elastically supported on the support posts 12 on the rear wall 11c of the main frame 11 by a pair of first dampers 30a. (Front end side) is supported by the support post 25 of the chassis mount 24 by a pair of second dampers 30b. Thereby, the chassis 28 is elastically supported by the four dampers 30a and 30b.

  The disk drive unit 22 uses the pair of first dampers 30a as fulcrums, and a chassis mount 24 between a raised position (drive position) shown in FIG. 5A and a lowered position (retracted position) shown in FIG. Further, it is supported so as to be rotatable, that is, capable of moving up and down. The chassis 28 is positioned substantially parallel to the disk tray 20 at the driving position, and the end portion on the second damper 30b side is positioned downward from the disk tray 20 at the retracted position.

  As shown in FIGS. 2, 4, 6, and 9, the moving mechanism 50 that moves the disc tray 20 and the disc drive unit 22 is provided on the front wall portion 11 d of the main frame 11 and is below the disc tray 20. positioned. The moving mechanism 50 is freely rotatable on a loading motor 51 as a drive source attached to the motor attachment portion 13c of the front wall portion 11d, a pulley 52 press-fitted into the rotating shaft of the loading motor, and a pulley gear fulcrum boss 13b on the front wall portion. A pulley gear 54 attached to the pulley, a drive belt 53 spanned between the pulley 52 and the pulley gear 54, a drive gear 56 rotatably attached to the gear fulcrum boss 13a of the front wall, and a cam slider 58.

  A tray gear 56a that meshes with the rack 23 of the disk tray 20 is formed coaxially on one surface of the drive gear 56, and a cam gear 56b that meshes with the rack of the cam slider 58 is coaxially formed on the other surface. Is formed. The rotation shafts of the loading motor 51, the pulleys 52, the pulley gears 54, and the drive gears 56 extend in a direction perpendicular to the surface of the disk tray 20.

  As shown in FIGS. 6, 9, and 10, the cam slider 58 functioning as a sliding member includes an elongated plate-like cam plate 58 a extending in a direction B perpendicular to the moving direction A of the disc tray 20, and a cam plate. And a guide plate 58b extending forward, and is integrally formed of synthetic resin or the like. The cam slider 58 is supported by the main frame 11 with the lower end portion of the cam plate 58a engaged with the slide groove 13d (see FIG. 3) of the front wall portion 11d, and in the direction B perpendicular to the moving direction A of the disc tray 20. It is slidably supported along. The cam plate 58 a is positioned to face the connecting portion 24 c of the chassis mount 24.

  A rack 60 that can mesh with the cam gear 56b is formed at one end of the guide plate 58b. The cam slider 58 is driven by the cam gear 56 b and is reciprocated in the movement direction B in conjunction with the movement of the disc tray 20. The cam plate 58a has a pair of cam grooves 64 and 65 that function as cams. The pair of cam grooves 64 and 65 are formed in parallel to each other.

  Each cam groove 64, 65 includes first groove portions 64a, 65a extending horizontally along the moving direction B, inclined groove portions 64b, 65b extending obliquely upward from the first groove portion, and an upper end of the inclined groove portion. Second groove portions 64c and 65c extending horizontally along the movement direction B. Of the cam grooves 64, the first groove portions 64a and the inclined groove portions 64b end portions on the first groove portion 64a side pass through the cam plate 58a and open on both surfaces of the cam plate. The other part of the cam groove 64 and the cam groove 65 are covered with a cam plate 58a on the front side and formed as a bottomed groove.

  A pair of engaging pins 26a and 26b projecting from the connecting portion 24c of the chassis mount 24 are slidably engaged with the pair of cam grooves 64 and 65 of the cam plate 58a. As the cam slider 58 moves, the engagement pin 26 moves in the cam grooves 64 and 65, and as a result, the chassis mount 24 is raised and lowered.

  When the loading motor 51 of the moving mechanism 50 is driven, power is transmitted from the pulley 52 to the pulley gear 54 and the driving gear 56 via the driving belt 53, and the cam slider 58 is moved in the moving direction B. As the cam slider 58 moves, the engagement pin 26 of the chassis mount 24 moves along the cam grooves 64 and 65. Then, the chassis mount 24 is pivoted about the pivots 23a and 23b in conjunction with the movement of the cam slider 58, and moves up and down. As a result, the disk drive unit 22 rotates about the first damper 30 a as a fulcrum and moves up and down together with the chassis mount 24.

  The disc tray 20 is driven by the tray gear 56a and moved along the moving direction A. While the disk tray 20 moves, the disk drive unit 22 is moved to the lowered position (retracted position) so as not to hinder the movement of the disk tray.

  In the operation state or loading state of the optical disk drive, the cam slider 58 is located at the first position and the engagement pins 26a, 26b of the chassis mount 24 as shown in FIGS. 5 (a), 11, 12, and 13. Is located in the second groove portions 64c and 65c of the cam grooves 64 and 65. As a result, the chassis mount 24 is held in the raised position, and the disk drive unit 22 is held in the drive position (upward position).

  When the chassis mount 24 is in the raised position, the engaging pin 26a engages with the second groove 64c and penetrates the second groove, and the hook 27 protruding from the tip of the engaging pin 26a It is adjacent to the front surface of the cam slider 58 in the vicinity of the two grooves. Thus, even when a deformation force described later is applied to the connecting portion 24c of the chassis mount 24 in a direction (G direction described later) in which the cam slider 58 and the engagement pins 26a and 26b are disengaged, the hook 27 is connected to the cam slider 58. And the deformation of the connecting portion 24c is suppressed, and the engagement pins 26a, 26b from the cam grooves 64, 65 are prevented from falling off.

  The cylindrical portions of the engaging pins 26a and 26b are located in the second grooves 64c and 65c of the cam slider 58, and cooperate with the pivots 23a and 23b of the chassis mount 24 to change the loading state of the chassis mount and the disk drive unit 22. maintain.

  When loading or unloading the optical disk 8 from or into the optical disk apparatus, the loading motor 51 is driven by pressing an eject button (not shown) provided on the front surface of the main frame 11 or by an external command for ejecting the optical disk, and the cam slider 58 is moved. It is moved in the B direction from the first position shown in FIG. 11 toward the second position shown in FIG. In conjunction with the movement of the cam slider 58, the engagement pins 26a and 26b of the chassis mount 24 move in the cam grooves 64 and 65 from the second groove portions 64c and 65c to the first groove portions 64a and 65a through the inclined groove portions 64b and 65b. .

  As shown in FIGS. 15, 16, and 17, the hook 27 of the engagement pin 26a is provided to be inclined at an angle corresponding to the inclined groove portion 64b. Therefore, while the engaging pins 26a and 26b of the chassis mount 24 move in the inclined grooves 64b and 65b, the hooks 27 provided on the engaging pins 26a do not face the surface of the cam slider 58 and are not in the cam groove 64. Is located. Accordingly, during this time, the hook 27 does not function as a hook, and it is the cylindrical pin portion that contacts the cam slider 58 no matter where the engagement pin is located in the cam groove. There is no loss of function.

  The inclined groove portions 64b and 65b move the chassis mount 24 up and down and down at a predetermined timing with respect to the ejection operation transition or loading operation transition, for example, to prevent the optical disk from being damaged by clamping or releasing the optical disk. Control the required operating load so that it is not overloaded.

  When the engagement pins 26a and 26b of the chassis mount 24 move to the second grooves 64a and 65a, the chassis mount 24 is moved from the raised position to the lowered position shown in FIGS. 5B and 18 and held at the lowered position. . Along with this, the disk drive unit 22 is lowered from the drive position to the retracted position and held at the retracted position.

  In the ejected state, that is, in the state where the disk drive unit 22 is moved to the retracted position, the hook 27 provided on the engagement pin 26a of the chassis mount 24 is disposed in the first cam groove 64a of the cam slider. The increase in the space for the entire apparatus due to the provision of the hooks 27 can be suppressed to a value that is not significantly different from the case without the hooks by absorbing by the turning operation of the chassis mount 24.

  After the disk drive unit 22 has moved to the retracted position, the disk tray 20 is moved by the loading motor 51 from the operating position indicated by the solid line shown in FIG. 1 to the loading / unloading position indicated by the two-dot chain line in FIGS. , Extending outward from the main frame 11. In this state, the optical disk 8 can be loaded or removed from the disk tray 20.

  When a loading switch (not shown) is pressed after loading the optical disc 8 on the disc tray 20 or when an external command for loading the optical disc is input, the loading motor 51 is driven in reverse and the disc tray 20 is moved by the moving mechanism 50. Is moved from the loading / unloading position to the operating position. As a result, the optical disk 8 is drawn into the main frame 11 together with the disk tray 20 and held at a predetermined position.

  With the disc tray 20 moved to the operating position, the cam slider 58 is moved from the second position toward the first position. In conjunction with the movement of the cam slider 58, the engagement pins 26a and 26b of the chassis mount 24 move in the cam grooves 64 and 65 from the first groove portions 64a and 65a through the inclined groove portions 64b and 65b to the second groove portions 64c and 65c. To do. As a result, the chassis mount 24 moves from the lowered position to the raised position shown in FIGS. 16 and 17, and accordingly, the disk drive unit 22 rises from the retracted position to the drive position and is held at the drive position.

  As a result, the optical disk 8 placed on the disk tray 20 is sandwiched between the turntable 33 of the disk drive unit 22 and the disk clamp member provided on the inner surface of the top cover (not shown), and is held rotatably. . The optical pickup 36 is positioned to face the information recording surface of the optical disc 8. In this state, the turntable 33 and the optical disk 8 are rotated at a predetermined speed by the spindle motor 32, and information is written to or read from the optical disk 8 by the optical pickup 36.

  The inventor conducted an impact test of the optical disk apparatus configured as described above. The impact test was performed on a completed product of an optical disk device including a disk tray, a housing (not shown), and the like. The impact direction is the direction of arrow D in FIG. 2, and measurement was performed by installing an accelerometer at the acceleration measurement point of the disk drive unit 22.

  FIG. 19 shows the measurement data of the impact value. When an impact test was performed by setting an impact value of a sine half-wave of 6 ms and 100 G to the impact tester, an impact value of 340 G, which is 3.4 times that of the disk drive unit 22, was generated. If the weight of the disk drive unit 22 is 2N, the load acting on the disk drive unit is 680N for 340G.

  The disk drive unit 22 is supported at a total of four locations including two locations on the chassis mount 24 and two locations on the main frame 11. Therefore, loads of 170 N are generated at the two support points of the chassis mount 24, respectively. When the impact value further increased to 6 ms and 150 G, it was confirmed that the load at the two support points of the chassis mount 24 increased in proportion to about 230 N.

  FIG. 20 is a diagram showing a result of analyzing the deformation of the chassis mount 24 from the impact value measurement data obtained by the impact test described above. At the time of impact of 6 ms and 150 G, a load of 230 N was applied to the two support points of the chassis mount 24, and the deformation amount along the G direction of the connecting portion 24 c in that case was 2.2 mm.

  In an actual test, in an optical disk drive that does not employ this embodiment, when an impact value of 6 ms and 150 G is received, the engagement pin of the chassis mount 24 drops off from the cam for raising and lowering the cam slider and becomes inoperable. In the optical disk apparatus according to the present embodiment, the engagement pin does not fall off from the cam of the chassis mount, and the function can be maintained.

  According to the optical disk apparatus configured as described above, by providing a hook on the engagement pin of the chassis mount, even if a large impact such as a drop impact acts on the apparatus and a deformation force is generated on the chassis mount, the hook This prevents the engagement pin from falling off from the cam slider, and at the same time, the deformation of the chassis mount can be suppressed. Thereby, the drop impact resistance performance is improved, the smooth operation of the structural members such as the chassis mount and the cam slider can be maintained, and the reliability can be improved.

  Also, there is no need to take measures such as increasing the thickness of the member to prevent deformation of each part of the chassis mount, or increasing the engagement length of the engagement pin with the cam, increasing the size of the device and increasing the manufacturing cost. Drop impact resistance can be improved without causing

  The hook of the chassis mount is provided so as to be inclined at an angle corresponding to the inclined cam portion (inclined groove portion) of the cam slider. Therefore, as described above, the hook does not contact the cam for raising and lowering the cam slider, and the engaging pin and the hook can be designed and arranged without making the cam shape special. Therefore, no problem occurs in the operation timing. Furthermore, the hook has a shape protruding in the radial direction from the tip end portion of the engagement pin, and at the time of assembly, the engagement pin can be easily engaged with the cam groove of the cam slider as in the conventional case.

  From the above, it is possible to obtain an optical disk apparatus with improved impact resistance performance, which can prevent the structural members from being deformed when an impact is applied, and prevent the structural members from falling off while maintaining space saving and low cost.

In the above-described embodiment, the hook is provided on one engagement pin of the chassis mount. However, the present invention is not limited to this.
As shown in FIGS. 21 and 22, according to an optical disc apparatus according to another embodiment of the present invention, the chassis mount 24 has two engagement pins 26a and 26b extending forward from the central portion of the connecting portion 24c. have. Hooks 27a and 27b are integrally formed at the extending ends of the engaging pins 26a and 26b, respectively. The hooks 27a and 27b protrude in the radial direction from the engagement pins 26a and 26b, and are formed in accordance with the inclination direction of the cam provided on the cam slider 58, for example, the inclined groove portions of the cam grooves 64 and 65. Yes. In addition, the inclination direction of the hooks 27a and 27b should just be set to the range settled in an inclination groove part.

  The pair of engagement pins 26a and 26b are engaged in the cam grooves 64 and 65 of the cam slider 58, respectively. When the chassis mount 24 is in the raised position, the engagement pin 26a is engaged with the second groove portion of the cam groove 64 and penetrates the second groove portion, and is hooked 27a projecting from the distal end portion of the engagement pin 26a. Is adjacent to the front surface of the cam slider 58 in the vicinity of the second groove. Similarly, the engaging pin 26b is engaged with the second groove portion of the cam groove 65 and penetrates the second groove portion, and the hook 27b protruding from the tip portion of the engaging pin 26b is in the vicinity of the second groove portion. The front surface of the cam slider 58 is adjacently opposed.

  As a result, even when a deformation force is applied to the connecting portion 24c of the chassis mount 24 in the direction in which the cam slider 58 and the engaging pins 26a and 26b are disengaged, the hooks 27a and 27b are hooked on the cam slider 58 and the connecting portion 24c. The deformation of the engagement pins 26a and 26b from the cam grooves 64 and 65 is prevented.

  In other embodiments, other configurations are the same as those of the above-described embodiment, and the same portions are denoted by the same reference numerals and detailed description thereof is omitted. And also in other embodiment, the effect similar to embodiment mentioned above can be acquired. Furthermore, according to another embodiment, by providing two hooks, it is possible to more reliably prevent the chassis mount from being deformed and the engagement pin from falling off, and to further improve the drop impact resistance. Become.

Note that the present invention is not limited to the embodiments as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.
The forming material, shape, and the like of each constituent member are not limited to the above-described embodiment, and can be changed as necessary.

FIG. 1 is a perspective view showing an optical disk apparatus according to an embodiment of the present invention with its top cover removed. FIG. 2 is a perspective view showing the internal structure of the optical disc apparatus with the disc tray removed. FIG. 3 is a perspective view showing a main frame of the optical disc apparatus. FIG. 4 is a perspective view showing a rear surface side of a disk tray and a chassis mount of the optical disk device. FIG. 5 is a cross-sectional view of the optical disc apparatus showing a state where the disc tray is pulled into the operating position and a state where the disc tray is pulled out to the loading / unloading position. FIG. 6 is an exploded perspective view showing a disk drive unit, a moving mechanism, and a chassis mount. FIG. 7 is a perspective view showing a chassis mount of the optical disc apparatus. FIG. 8 is a front view showing the chassis mount. FIG. 9 is a perspective view showing a chassis mount and a cam slider of the optical disc apparatus. FIG. 10 is a front view showing the cam slider. FIG. 11 is a perspective view showing a cam slider and a chassis mount in a first position and a raised position. 12 is an enlarged perspective view showing an engaging pin portion of FIG. 11. FIG. 13 is a cross-sectional view showing a cam slider and a chassis mount in a first position and a raised position. FIG. 14 is a perspective view showing a cam slider and a chassis mount in a second position and a lowered position. FIG. 15 is a front view of the cam slider and the chassis mount, showing a state in which the engagement pin is located in the inclined groove portion of the cam groove. 16 is an enlarged front view showing the engaging pin and the cam groove in FIG. FIG. 17 is a cross-sectional view showing the cam slider and the chassis mount, showing a state in which the engaging pin is located in the inclined groove portion of the cam groove. FIG. 18 is a cross-sectional view showing the cam slider and the chassis mount in the second position and the lowered position. FIG. 19 is a diagram showing measurement results in an impact test. FIG. 20 is a diagram showing a result of analyzing the deformation of the chassis mount from the impact value measurement data obtained by the impact test. FIG. 21 is a perspective view showing a chassis mount of an optical disc apparatus according to another embodiment of the present invention. FIG. 22 is a perspective view showing a chassis mount and a cam slider of the optical disc apparatus according to another embodiment.

Explanation of symbols

8 ... Optical disc, 11 ... Main frame, 11a, 11b ... Side wall, 11d ... Front wall,
20 ... Disc tray, 22 ... Disc drive unit, 24 ... Chassis mount,
24a, 24b ... arm part, 24c ... coupling part, 26a, 26b ... engagement pin,
27, 27a, 27b ... hook, 32 ... spindle motor, 36 ... optical pickup,
50 ... Moving mechanism, 51 ... Loading motor, 58 ... Cam slider,
64, 65 ... cam groove, 64a, 65a ... first groove part, 64b, 65b ... inclined groove part,
64c, 65c ... 2nd groove part

Claims (6)

A main frame having a pair of opposing side walls and a front wall extending between the side walls;
A motor that supports and rotates a disk-shaped recording medium and a head unit that performs information processing on the recording medium, and allows a driving position for driving the recording medium and loading and unloading of the recording medium. A medium drive unit provided so as to be movable up and down between the retreat position;
An elevating and holding member supported by the main frame so as to be able to move up and down between a raised position corresponding to the drive position and a lowered position corresponding to the retracted position while supporting the medium driving unit;
A sliding member that is movably provided on the front wall and has a cam that is engaged with the lifting and lowering holding member, and that lifts and lowers the lifting and lowering holding member according to the movement,
The elevating and lowering holding member extends between a pair of arm portions extending opposite to the side walls, one end portion of the arm portion and facing the front wall, and the other end portion of the arm portion. A fulcrum portion provided and supported by the side wall; an engagement pin protruding from the coupling portion toward the front wall side and engaged with the cam; and the elevating and holding member formed on the engagement pin moved to the raised position And a hook that engages with the sliding member to maintain the engaging pin and the sliding member in an engaged state. The cam of the sliding member has a cam groove formed in the sliding member, and the cam groove extends obliquely from the first groove portion extending along the moving direction of the sliding member. An inclined groove portion that has been taken out, and a second groove portion that extends from the inclined groove portion along the moving direction of the sliding member,
The engaging pin of the elevating holding member engages with the first groove portion of the cam groove when the elevating member is in the lowered position, and is engaged with the second groove portion of the cam groove when the elevating member is in the raised position. Engages and penetrates the second groove, and the hook protrudes from the extending end of the engagement pin, and faces the sliding member in the vicinity of the second groove when the elevating member is in the raised position. The optical disc apparatus according to claim 1.   The optical disc apparatus according to claim 2, wherein the hook is formed in a direction in which the engaging pin is positioned in the inclined groove when the engaging pin moves in the inclined groove.   The sliding member has another cam formed in parallel with the cam, and the elevating member projects from the connecting portion to the front wall side from the connecting portion and engages with the other cam. The optical disk apparatus according to claim 1, further comprising an engagement pin, wherein the engagement pin and the other engagement pin are provided side by side along an extending direction of the connecting portion.   The lifting / lowering holding member is formed on the other engaging pin, and when the lifting / lowering holding member moves to the raised position, the lifting / lowering holding member engages with the sliding member to engage the other engaging pin and the sliding member. The optical disc apparatus according to claim 4, further comprising a hook for maintaining the state. The main frame is provided on the main frame so as to be movable between a loading / unloading position for holding the recording medium and projecting outside the main frame and an operation position for driving the recording medium at a predetermined position in the main frame. Recording medium holder,
A moving mechanism that moves the lifting / lowering holding member to the retracted position while the recording medium holding member moves, and moves the lifting / lowering holding member and the medium driving unit to the driving position when the recording medium holding member moves to the operating position. And the moving mechanism includes the sliding member provided on the front wall portion so as to be movable along a direction intersecting the side wall, and a drive source for moving the sliding member. The optical disk device according to claim 1.

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