JP2012252753A - Optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk device having excellent static electricity resistance and improved reliability.SOLUTION: An optical disk device comprises: a tray 10 on which an optical disk is placed; a housing 50 that accommodates the tray 10 in a manner in which the tray 10 can be put in and out; and an earth plate 30 that is formed of a conductive material, disposed on the tray 10, and located in the inner side than the profile of the tray 10. The earth plate 30 includes an earth plate main body 31, an extension part 32 that extends from the earth plate main body 31, and a bent end part 33 that is bent from an extended end of the extension part 32 toward a tray insertion direction side. The housing 50 is retracted in the tray insertion direction so as to form a space to receive the bent end 33 when the tray 10 is accommodated in the housing 50, and has an inclined surface 71 that is gradually inclined from a tray ejection direction to the tray insertion direction. The bent end part 33 of the earth plate 30 contacts the inclined surface 71 when the tray 10 is accommodated in the housing 50.

Description

  The present invention relates to an optical disc apparatus in which measures against static electricity are taken.

  In recent years, optical disk devices have been made lighter and thinner. In particular, thin optical disk devices such as 12.7 mm and 9.5 mm that are mounted on notebook personal computers typically have an eject switch as a countermeasure against static electricity. A ground plate that acts as a lightning rod is installed around the ground, and the ground plate is grounded by contacting the ground plate with the bottom case.

  In such a conventional optical disc apparatus, the ground plate protrudes outward from the outer shape of the drive, and therefore the ground plate may be deformed depending on handling. Depending on the deformation state of the ground plate, the ground plate and the bottom case may not be sufficiently contacted, and static electricity may not be efficiently discharged to the outside.

  In addition, as an optical disk device that prevents the deformation of the ground plate, a ground plate (ground member) is disposed at the front base of the tray, and the ground plate extends in a direction substantially perpendicular to the tray ejection direction and is ejected from the tray. A tongue-shaped ground extension that can be bent in the direction, and a front protrusion on the front base of the tray on the moving miracle of the tip of the ground extension when the ground extension is bent Discharges static electricity to the outside by touching the case side ground contact part provided in the case, and the fingertip contacts the ground extension part and deforms in the tray discharge direction. In such a case, an optical disk device has been introduced that restricts excessive deformation of the ground extension by bringing the tip of the ground extension into contact with the front protrusion. (For example, refer to Patent Document 1).

WO2009 / 130768 A1 publication

  However, in order to manufacture the optical disk device according to Patent Document 1, a process for disposing a front protrusion that restricts excessive deformation of the ground extension is required. Further, in order to improve the electrical conductivity between the ground extension part and the case side ground contact part, the base end of the ground extension part (the boundary part with the substrate cover part) and the substantially central part of the ground extension part Since the bending process is performed at both positions and the contact area between the two is increased, the manufacturing becomes complicated. Even if bending is performed at a plurality of positions in this way, it is difficult to sufficiently increase the contact area between the ground extension portion and the case side ground contact portion, and further improvement in conductivity is expected. .

  The present invention has been made in consideration of the above points, and an object of the present invention is to provide an optical disc apparatus having excellent electrostatic resistance and improved reliability.

  In order to achieve this object, the present invention provides an optical disc apparatus that records and reproduces information on an information recording surface of a loaded optical disc, the tray on which the optical disc is placed, and the tray being removable. And a ground plate formed of a conductive material and disposed on the tray and positioned on the inner side of the outer shape of the tray. The ground plate includes a ground plate main body and the ground plate. An extension portion extending from the plate body, and a bent end portion bent from the extension end portion of the extension portion toward the tray insertion direction. Having an inclined surface that is retreated in the tray insertion direction so as to form a space for receiving the bent end portion when being accommodated in the tray, and that is gradually inclined from the tray discharge direction toward the tray insertion direction. The ground plate, when the tray is accommodated in the housing, the bent end portion is intended to provide a contact with the optical disk device to the inclined surface.

  According to the present invention, it is possible to provide an optical disc apparatus having excellent electrostatic resistance and improved reliability.

1 is a perspective view of an optical disc device according to an embodiment of the present invention, and shows a state in which the entire tray is discharged from a housing. It is the perspective view which looked at the optical disk device shown in FIG. 1 from the back. FIG. 2 is a perspective view showing a state where an upper cover is removed from the optical disc apparatus shown in FIG. 1. It is a perspective view showing the state where the upper cover was removed from the optical disc device concerning the embodiment of the present invention, and is the figure showing the state where the tray was stored in the case. FIG. 5 is an enlarged perspective view showing a part of the optical disc apparatus shown in FIG. 4 on the tray ejection direction side. FIG. 5 is an enlarged front view showing a part of the optical disc apparatus shown in FIG. 4 on the tray discharge direction side. It is a perspective view which shows the bottom case of the optical disk apparatus shown in FIG. It is a perspective view which expands and shows a part of tray discharge direction side of the bottom case shown in FIG. It is a perspective view which shows the earth plate of the optical disk apparatus shown in FIG. It is a perspective view which shows the state which the bottom case and earth plate of the optical disk apparatus shown in FIG. 1 are contacting. It is the perspective view which looked at the connection state of the bottom case and ground plate shown in FIG. 10 from the tray insertion direction side. It is a perspective view which expands and shows a part of connection state of the bottom case and earth plate which are shown in FIG. It is the top view which looked at the connection state of the bottom case shown in FIG.

  Next, an optical disc apparatus according to an embodiment of the present invention will be described with reference to the drawings. In addition, embodiment described below is the illustration for demonstrating this invention, and this invention is not limited only to these embodiment. Therefore, the present invention can be implemented in various forms without departing from the gist thereof. Further, in each drawing, for easy understanding, the thickness, size, enlargement / reduction ratio, etc. of each member are not matched with the actual ones. In the present embodiment, the side on which the optical disk is mounted will be described as “upper”, the opposite side as “lower”, the tray ejection direction side as “front side”, and the tray insertion side as “rear side”.

  FIG. 1 is a perspective view of an optical disc apparatus according to an embodiment of the present invention, showing a state in which the entire tray is ejected from the housing, and FIG. 2 is a perspective view of the optical disc apparatus shown in FIG. 3 is a perspective view showing a state in which the upper cover is removed from the optical disc apparatus shown in FIG. 1, and FIG. 4 is a perspective view showing a state in which the upper cover is removed from the optical disc apparatus according to the embodiment of the present invention. FIG. 5 is a perspective view showing a part of the optical disc apparatus shown in FIG. 4 on the tray ejection direction side, and FIG. 6 is a perspective view showing the tray of the optical disc apparatus shown in FIG. It is a front view which expands and shows a part of discharge direction side.

  As shown in FIG. 1 to FIG. 6, the optical disc apparatus 1 according to the present embodiment includes a tray 10 on which an optical disc is placed, and a housing 50 that accommodates the tray 10 on which the optical disc is placed in a removable manner. .

  The tray 10 is provided with guide rails 11A and 11B for guiding the loading and unloading of the tray 10 on both sides parallel to the tray loading / unloading direction (front-rear direction). These guide rails 11A and 11B are supported so as to be movable in the front-rear direction by rail guides 52A and 52B formed in a casing 50 described in detail later. The front end surface of the tray 10 is a bezel 19 that closes an opening formed in the front surface of the housing 50. The bezel 19 includes a ground plate 30 for discharging static electricity to the outside, and the tray 10. An eject button 20 for discharging from the body 50 and an indicator 28 are provided.

  The tray 10 is movably disposed with respect to the guide rails 11A and 11B. When the tray 10 is inserted into the housing 50, the tray 10 is left in a state where the guide rails 11A and 11B remain outside the housing 50. The guide rails 11A and 11B enter the housing 50 by the bezel 19 of the tray 10 coming into contact with the guide rails 11A and 11B.

  The bezel 19 has a recess 18 for receiving a ground plate 30 to be described in detail later. The accommodating portion 18 is formed with a depth that allows the ground plate 30 to be always positioned inside the outer shape of the tray 10. Therefore, it is possible to prevent the earth plate 30 from being caught by something, or from being deformed due to an external load, and the handling can be facilitated.

  On the upper surface of the tray 10 is formed an optical disk mounting portion 12 on which an optical disk is mounted. A part of the outer periphery of the optical disk mounting portion 12 has a substantially circular shape that matches the shape of the optical disk. The optical disc mounting portion 12 is provided with an opening 13, and a unit mechanism 15 described later is fixed to the opening 13. Further, the tray 10 is provided with a lock mechanism (not shown) that holds the storage state in the housing 50.

  The unit mechanism 15 records information on the information recording surface of the optical disc and / or the information recorded on the information recording surface of the optical disc, and the spindle motor 16 for rotating the optical disc mounted on the optical disc mounting unit 12. It has an optical pickup 17 that performs reproduction, and a pair of guide shafts (not shown) that support the optical pickup 17 so as to be movable in the radial direction of the mounted optical disk.

  A clamper 29 that is inserted into the center hole of the optical disk and restricts the movement of the optical disk in the radial direction is disposed at the tip of the rotating shaft of the spindle motor 16 on the optical disk mounting part 12 side, and is mounted on the optical disk mounting part 12. The optical disk is chucked by the clamper 29 and rotated. Note that one end of the flexible cable 27 is fixed to the end of the optical pickup 17 on the side away from the spindle motor 16, and the other end of the flexible cable 27 is fixed to the tray 10. It is electrically connected to a printed wiring board (not shown).

  The housing 50 includes a bottom case 55 and an upper cover 56. The front end surface of the housing 50 is an opening for taking in and out the tray 10. In addition, rail guides 52A and 52B that respectively support the guide rails 11A and 11B formed on the tray 10 so as to be movable are formed on both side portions 53A and 53B parallel to the front-rear direction of the bottom case 55.

  7 is a perspective view showing the bottom case 55, and FIG. 8 is an enlarged perspective view showing a part of the front side of the bottom case 55. As shown in FIG. As shown in FIGS. 7 and 8, at the front end of the side portion 53A of the bottom case 55, the height of the side portion 53A decreases (the length in the thickness direction of the casing 50 decreases) 73. An inclined surface 71 that is gradually inclined from the front side toward the rear side from the side portion 53A toward the inside is formed at the upper portion of the stepped portion 73, and further away from the side portion 53A of the inclined surface 71. A protruding portion 72 that protrudes to the inside of the bottom case 55 is formed at the tip of the other side. The inclined surface 71 is an end surface facing the front side, and an end surface 39 of the bent end portion 33 of the ground plate 30 described in detail later can be brought into contact therewith. In the present embodiment, the stepped portion 73, the inclined surface 71, and the convex portion 72 form a conduction receiving portion 70 that receives and conducts the bent end portion 33 of the ground plate 30 described in detail later.

  The casing 50 is provided with a discharge mechanism (not shown) for discharging the tray 10. Further, the tray 10 and the housing 50 are electrically connected by a flexible cable 40, and control / signal processing information is passed between them.

  FIG. 9 is a perspective view showing the earth plate 30. The earth plate 30 is made of a conductive material (for example, metal), and as shown in FIG. 9, a plate-like earth plate body 31 and an extension extending from the earth plate body 31 on the same plane. And a bent end portion 33 bent toward the rear side from the production end portion of the extending portion 32. Since the earth plate 30 has a configuration in which the earth plate main body 31 and the extending portion 32 are on the same plane, it is not necessary to bend the portion.

  An engaging portion (not shown) formed on the bezel 19 has an earth plate 30 at an end of the earth plate body 31 on the side where the extending portion 32 is formed and an end opposite to the end. ) And engaging portions 37 and 38 for fixing the ground plate 30 to the bezel 19 are formed. In addition, a contact portion 36 that contacts the inner wall of the housing portion 18 when the ground plate 30 is housed in the housing portion 18 is formed on the upper portion of the ground plate body 31 on the extending portion 32 side. In addition, the ground plate body 31 is provided with a hole 34 for exposing the eject button 20 to the front surface of the bezel 19 and a hole 35 for exposing the indicator 28 to the front surface of the bezel 19.

  The extension part 32 extends in the same plane as the ground plate body 31 in a normal state, but when a force is applied in the front-rear direction, the extension part 32 deforms (bends) in that direction. When released, it can be restored to its original state.

  The bent end portion 33 is bent at a predetermined angle at which the rear end surface 39 can come into surface contact with the inclined surface 71 of the conduction receiving portion 70. In order to bring the end surface 39 and the inclined surface 71 into surface contact, that is, to make the end surface 39 of the bent end portion 33 and the inclined surface 71 substantially parallel to each other, the inclination angle of the inclined surface 71 is adjusted. Alternatively, the bending angle of the bent end 33 may be adjusted, or the angle between the two may be adjusted.

  Next, the relationship between the ground plate 30 and the conduction receiving unit 70 formed on the bottom case 55 will be described in detail. FIG. 10 is a perspective view showing a state in which the ground plate 30 and the continuity receiving unit 70 are in contact with each other when viewed from the front side, and FIG. 11 shows a state in which the ground plate 30 and the continuity receiving unit 70 are in contact with each other. FIG. 12 is an enlarged perspective view showing a connection state between the earth plate 30 and the conduction receiving unit 70, and FIG. 13 is a diagram showing that the earth plate 30 and the conduction receiving unit 70 are in contact with each other. It is the top view which looked at the state from the back.

  First, when the tray 10 on which the optical disk is placed is pushed toward the housing 50, the tray 10 stops at a normal position where at least one of information recording and reproduction is performed on the information recording surface of the optical disk. At this time, as shown in FIGS. 10 to 13, the end surface 39 of the bent end portion 33 of the ground plate 30 abuts on the inclined surface 71 of the conduction receiving portion 70 of the bottom case 55, and the bent end portion 33 contacts the inclined surface 71. Pressed. By this pressing force, the end surface 39 of the bent end portion 33 and the inclined surface 71 are reliably in contact with each other, and both are conducted. Since this conduction is performed by surface contact between the end surface 39 of the bent end portion 33 and the inclined surface 71, the contact area between both surfaces is made larger than contact between the surface and a line (for example, a corner portion of a member). Can do. Therefore, since the electrical conductivity between the two can be greatly improved, it is possible to provide an optical disc apparatus with excellent electrostatic resistance and improved reliability.

  Further, as shown in FIG. 13, the ground plate 30 is deformed outward (bent) at the boundary portion between the ground plate main body 31 and the extending portion 32 by the pressing force. Similarly to the above, the ground plate 30 is accommodated in the accommodating portion 18 and is located on the inner side of the outer shape of the tray 10. Therefore, even when the ground plate 30 and the conduction receiving unit 70 (bottom case 55) are in a conductive state, the ground plate 30 may be deformed by being caught by something or being externally loaded. It can prevent and can handle easily.

  In this state, the tray 10 is held in the accommodated state of the tray 10 in the housing 50 by a lock mechanism (not shown) disposed on the tray 10. Then, by performing a predetermined operation on the optical disc apparatus 1, at least one of information recording and reproduction is performed on the information recording surface of the optical disc.

  On the other hand, when the tray 10 is ejected from the housing 50, when the eject button 20 is pressed, the tray 10 is unlocked by the locking mechanism (not shown), and the tray 10 is ejected by the ejection mechanism (not shown) disposed in the housing 50. 10 is discharged from the housing 50.

  In the present embodiment, the case where the end surface 39 of the bent end portion 33 of the ground plate 30 and the inclined surface 71 of the conduction receiving portion 70 of the bottom case 55 are in surface contact with each other is not limited to this. If the portion where the bent end 33 on the 50 side contacts is an inclined surface, the contact portion of the bent end 33 with the inclined surface 71 may not necessarily be a surface parallel to the inclined surface 71. Moreover, the contact part with the inclined surface 71 of the bending end part 33 is not limited to an end surface.

  In the present embodiment, the ground plate body 31 and the extending portion 32 are on the same plane in a normal state (a state where no load is applied to the ground plate 30 from the housing 50 side). However, the present invention is not limited to this, and the earth plate 30 can be positioned inside the outer shape of the tray. When the tray 10 is accommodated in the casing 50, the bent end portion 33 is formed on the inclined surface 71 of the casing 50. If it is the structure which contact | abuts, it will not specifically limit.

  In the present invention, the end surface 39 of the bent end portion 33 may be an inclined surface that is inclined so as to be parallel to the inclined surface 71. By doing in this way, a contact area with the inclined surface 71 can be taken further, and the electrical conductivity between both can be improved more.

  Furthermore, the ground plate 30 is disposed with respect to the tray 10 and the inclined surface 71 is formed with respect to the housing 50 so that the ground plate 30 is located inside the outer shape of the tray and the tray 10 is accommodated in the housing 50. In this case, there is no particular limitation as long as the bent end portion 33 is in contact with the inclined surface 71 of the housing 50.

  DESCRIPTION OF SYMBOLS 1 ... Optical disk apparatus, 10 ... Tray, 18 ... Storage part, 19 ... Bezel, 30 ... Earth plate, 31 ... Ground plate main body, 32 ... Extension part, 33 ... Bending edge part, 39 ... End surface, 50 ... Case, 55 ... Bottom case, 56 ... Upper cover, 70 ... Conduction receiving part, 71 ... Inclined surface, 72 ... Convex part, 73 ... Step part

Claims (6)

An optical disc apparatus that records and / or reproduces information on an information recording surface of an installed optical disc,
A tray on which the optical disk is placed;
A housing for accommodating the tray in a removable manner;
An earth plate formed of a conductive material, disposed on the tray and located inside the outer shape of the tray;
With
The ground plate includes a ground plate main body, an extending portion extending from the ground plate main body, and a bent end portion bent from the extending end portion of the extending portion toward the tray insertion direction. And
The housing is retracted in the tray insertion direction so as to form a space for receiving the bent end when the tray is accommodated in the housing, and is gradually inclined from the tray ejection direction to the tray insertion direction. Having an inclined surface
The ground plate is an optical disc apparatus in which the bent end abuts on the inclined surface when the tray is accommodated in a housing. The ground plate is disposed on a tray discharge direction end surface of the tray,
The optical disk apparatus according to claim 1, wherein the housing includes a bottom case and an upper cover, and the inclined surface is formed on an upper end surface of the bottom case in a tray discharge direction.   The optical disk apparatus according to claim 2, wherein when the tray is accommodated in the housing, the end surface of the bent end portion in the tray insertion direction is in surface contact with the inclined surface.   The optical disk apparatus according to claim 1, wherein the ground plate main body and the extending portion are located on the same plane.   When the tray is housed in the casing, the bent end portion of the ground plate is pressed against the inclined surface, and the pressing force holds the contact between the bent end portion and the inclined surface. 2. The optical disc apparatus according to claim 1, wherein the ground plate can be held inside the outer shape of the tray.   4. The optical disc apparatus according to claim 3, wherein an end surface of the bent end portion in the tray insertion direction is an inclined surface that is in surface contact with the inclined surface.

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