JP2001101811A - Optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk device of a simple structure which can surely prevent the slip-off of a feed shaft with no use of any slip-off prevention member and where the cost is reduced. SOLUTION: This device includes a turntable 52 where a disk D is placed on a chassis 51, an optical pickup 56 and guide shafts 54 and 55 which guide the pickup 56 toward the radius direction of the disk D. A nut member 64 is added to the pickup 56 and a lead screw 65 which locks a nut part 64a of the member 64 is set aside the pickup 56. A holder 74 has a bearing member 73 which supports one of both ends of the screw 65 at the side of the turntable 52 and a cut groove W5 where the other end of the screw 65 is inserted and supported. Then a pressure piece 75e having a sloping surface 75g which presses partly the other end of the screw 65 in the inserting direction of the groove W5 is unified with a pressure member 75 which presses elastically the screw 65 in the length direction of the screw 65 by the energizing force of a coil spring 78.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk apparatus for recording or reproducing data by loading an optical disk.

[0002]

2. Description of the Related Art In an optical disk drive, an optical disk is loaded, and a laser beam is incident on an information recording surface of the optical disk.
The information is recorded on the information recording surface, and the recorded information is reproduced.

FIG. 5 is a perspective view of a conventional optical disk device 100. The optical disc device 100 mainly includes a substantially rectangular chassis 101 having a cutout at a part of an outer edge formed of sheet metal, and a spindle provided on the chassis 101 and having a turntable 102 coaxially fixed thereto. A motor 103, guide shafts 104 and 105 arranged in parallel with each other, an optical pickup 106 having an objective lens 106a disposed between the guide shafts 104 and 105, and having a substantially rectangular outer shape;
And a feed mechanism of an optical pickup, described later, for feeding the optical pickup in the longitudinal direction of the guide shafts 104 and 105.

Next, the configuration of the optical disk device 100 will be described in detail. First, a substantially rectangular hole 101a is formed in the center of the chassis 101. A spindle motor 103 is attached and fixed to the surface of the chassis 101 at one edge of the hole 101a facing the longitudinal direction of the chassis 101. Guide shafts 104 and 105 are provided on both sides of the short hole 101a so as to be parallel to the longitudinal direction of the chassis 101, respectively. , Simply, the guide shaft 104
Of the chassis 101 are protruded or bent to form positioning pieces 101b and 101c.
Thus, the positioning in the length direction and the radial direction is performed, and the chassis 101 is attached and fixed to the chassis 101 using screws 107. The other end of the guide shaft 104 on the side opposite to the turntable 102 side (hereinafter, referred to as the other end of the guide shaft 104) is similarly positioned by the positioning piece 101d and fixed to the chassis 101 by the screw 111. The leaf spring 108 elastically urges and is supported by the chassis 101. On the other hand, both ends of the guide shaft 105 are similarly positioned with the positioning pieces 1.
01e, 101f and 101g, 101h.
The plate springs 109 and 110 fixed by the members 12 and 113 elastically urge and support the chassis 101.

The guide shaft 1 is inserted into round holes 106e and 106f formed in bent pieces 106c and 106d provided at one longitudinal end of the optical pickup 106, respectively.
No. 04 is inserted and the notch groove 10 formed in the bent piece 106g provided at the other end opposite to the round holes 106e and 106f.
6h is slidably supported by the guide shaft 105, so that the optical pickup 106 can move in the length direction of the guide shafts 104, 105 (radial direction of the optical disk).
You will be guided to move freely.

The bent piece 10 of the optical pickup 106
A nut member 114 is provided at one end on the 6c, 106d side.
Is mounted integrally with the optical pickup 106, and its nut portion 114a elastically abuts a thread valley of a lead screw 115 disposed substantially parallel to the guide shaft 104 and rotatable around the axis. It has become. On the other hand, a spur gear 116 is coaxially fixed to an end of the lead screw 115 on the side opposite to the turntable 102 so as to rotate integrally, and a spur gear 117 meshing with the spur gear 116 has a feed motor 118. (See FIG. 6). And
By driving the feed motor 118, the lead screw 115 rotates at a gear ratio determined by the spur gear 116 and the spur gear 117, and the optical pickup 106 to which the nut member 114 is fixed is fed in the radial direction of the optical disk.

The optical disk is a turntable 102.
The laser beam emitted from the objective lens 106a of the optical pickup 106 is focused on the information recording surface of the optical disc by being rotated by the spindle motor 103,
Further, the return light reflected from the information recording surface according to the information passes through the objective lens 106a again and is received in the optical pickup 106, so that the information on the information recording surface of the optical disk is read or the information is recorded on the information recording surface. Or record information. Further, following the information recording surface of the optical disk, the optical pickup 106
18 provides for controlled movement along the length of the guide shafts 104,105.

Next, the feed mechanism of the optical pickup will be described with reference to FIG. FIG. 6 shows an optical disk device 1
00 shows a partially exploded perspective view of FIG.

First, a hole 101a is formed in the chassis 101.
Notch 101i in which a portion of the edge along the guide shaft 104 opposite to the turntable 102 is cut away.
A notch 101j is formed in the longitudinal direction of the chassis 101 (back side in the figure) so as to be partially connected to the notch 101i and partially surround the leaf spring 108 and the positioning piece 101d. The guide shaft 10 of the hole 101a
A bent piece 101k is formed by projecting a part of the chassis 101 from the vicinity of the turntable 102 along the edge portion 4 and bending it into a U-shape opened upward to form a bearing portion 101k '.

On the other hand, 119 is a holder formed by bending a sheet metal. The holder 119 includes a bent piece 119a for mounting to the chassis 101, a bent piece 119c formed with a mounting surface 119c 'of the feed motor 118 and a bearing 119c "which is a cutout groove for supporting the lead screw 115.
A bent piece 119d having a screw hole at the center where a part of the bent piece 119c is further bent and formed, a bent piece 119e having an abutting surface 119e ', and a bent piece 1
19e and a bent piece 119b for attachment to the chassis 101 which is further bent and formed.

A cylindrical portion 116a projects from the spur gear 116 fixed to the lead screw 115 on the side opposite to the turntable 102. A compression coil spring 120 is inserted into the cylindrical portion 116a, and a cylindrical slide member 115a is slidably fitted in the axial direction of the lead screw 115. The slide member 115a has a protruding portion 115a 'formed coaxially at the distal end thereof.

Thus, the bent piece 119 of the holder 119
The feed motor 118 is screwed and fixed to the mounting surface 119c 'provided on the feed motor c by screws 122, 122. Thereafter, the spur gear 117 is mounted and fixed to the rotating shaft 118a of the feed motor 118. And the holder 119 is the bent piece 119
a and 119b are attached to the chassis 101 with screws 121, 121,
By being screwed at 121, the chassis 101
Are arranged in the notches 101i and 101j.

Next, one end of the lead screw 115 on the turntable 102 side is inserted into the bearing 101k 'of the bent piece 101k formed on the chassis 101, and the other end is formed on the bent piece 119c of the holder 119. Bearing part 11
9c ", the lead screw 11
5 is supported rotatably about an axis. Further, one end of the lead screw 115 is urged by a leaf spring 123 whose upper part is screwed to the chassis 101 by a screw 124, and the other end of the lead screw 115 is screwed into a leaf spring mounting bent piece 119 d of the holder 119. By being urged by the leaf spring 125, which is a retaining member screwed by the 126, the lead screw 115 is prevented from rattling in the radial direction and is prevented from coming off the bearings 101k 'and 119c ". .

The slide member 115a fitted to the cylindrical portion 116a formed on the spur gear 116 fixed to the lead screw 115 compresses the compression coil spring 120, and the projection 115a 'of the slide member 115a is bent by the bent piece 119e of the holder 119. The leading end surface of the lead screw 115 at one end side is constantly urged to the edge 101m adjacent to the bent piece 101k in the hole 101a because the contact surface 119e 'is formed so as to urge it. Therefore, rattling in the length direction of the lead screw 115 is prevented.

[0015]

However, in the conventional optical disc apparatus 100, as shown in FIG. 6, the other end of the lead screw 115 is formed by cutting off a part of a bent piece 119c to form a bearing 119c. Since the mounting is performed through the notch portion, there is an advantage that the workability at the time of mounting is improved as compared with a case where the bearing portion is mounted in a through hole having no notch portion. In order to prevent the lead screw 115 from coming out of the cutout portion, a leaf spring 125 serving as a retaining member must be provided, which increases the number of components and complicates the structure, thereby increasing the cost. .

An object of the present invention is to provide an optical disk device which can surely prevent the feed shaft from slipping off without using a slip-off preventing member, has a simplified structure, and can be reduced in cost.

[0017]

As a first means for solving the above problems, a turntable on which an optical disk is mounted on a chassis, an optical pickup for recording or reproducing data on or from the optical disk, Guide means for guiding the optical pickup in the radial direction of the optical disk, an engaging portion provided on the optical pickup, a spiral groove formed to engage with the engaging portion, and a feed shaft rotatably driven around an axis; Are provided in parallel with the optical pickup, and a support member for supporting one end of the feed shaft and a cutout groove for inserting and supporting the other end are provided on the chassis, and the other end of the feed shaft is provided. An optical disc device in which a pressing member that elastically presses a portion in an axial direction is provided on the chassis, wherein the pressing member has a pressing portion that abuts on the other end of the feed shaft, Optical disc apparatus pressing portion, characterized in that it has to divide the other end of the feed shaft direction of insertion into the slit.

Further, as a second solution, the pressing portion has an inclined surface, and the other end of the feed shaft comes into contact with the inclined surface.

Further, as a third solution, the pressing portion is displaced in the axial direction of the feed shaft,
An elastic member for urging the pressing portion is provided on the pressing member.

Further, as a fourth solution, the pressing member is a resin integrally formed on the chassis by outsert molding, and comprises a base portion and a support piece provided on the base portion for supporting the pressing portion. In addition, the base portion and the pressing portion are provided with locking portions with which the elastic members are engaged.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical disk drive according to an embodiment of the present invention will be described below with reference to FIGS.

FIGS. 1A and 1B are a plan view and a side view of an optical disk device 50 showing an embodiment of the present invention. The optical disk device 50 mainly includes a rectangular chassis 51 formed of sheet metal, a spindle motor 53 provided on the chassis 51 and having a turntable 52 coaxially fixed thereto, and a guide arranged in parallel with each other. Shaft 54,
55, an optical pickup 56 having an objective lens 56a disposed between the guide shafts 54 and 55 and having a substantially rectangular outer shape with a partially arcuate concave portion, and an optical pickup 5
And a feed mechanism for feeding the guide shaft 6 in the length direction of the guide shafts 54 and 55.

Next, the configuration of the optical disk device 50 will be described in detail. First, a substantially rectangular hole 51a is formed in the center of the chassis 51, and a spindle motor 53 is provided on one of the opposing edges of the hole 51a in the longitudinal direction of the chassis 51. It is attached and fixed on 51 surfaces. At the center of the other edge of the hole 51a on the side opposite to the spindle motor 53, a substantially rectangular hole 51b cut out is formed. Also,
Guide means, that is, guide shafts 54 and 55 are provided on both sides of the hole 51a in the short direction of the chassis 51 so as to be parallel to the longitudinal direction of the chassis 51, respectively. One end is positioned and supported in a length direction and a radial direction by a first support member 57 made of resin formed on the surface of the chassis 51 by outsert molding. The other end of the guide shaft 54 on the side opposite to the turntable 52 side is perpendicular to the chassis 51 surface (hereinafter referred to as height direction) by a second resin support member 58 formed similarly.
And the elasticity of the torsion coil spring 59 urges and supports the surface of the chassis 51. On the other hand, both end portions of the guide shaft 55 can be similarly moved in the height direction by the third support member 60 and the fourth support member 61 made of resin, respectively, and attached to the chassis 51 side by the torsion coil springs 62 and 63. It is being urged and supported.

The guide shaft 54 is inserted through round holes 56e and 56f formed in support portions 56c and 56d provided at one end in the longitudinal direction of the optical pickup 56, and is opposite to the round holes 56e and 56f. A notch groove 56h formed in a support portion 56g provided at the other end of the optical disk D is slidably supported by the guide shaft 55, so that the optical pickup 56 can move in the length direction of the guide shafts 54, 55 (in the radial direction of the optical disc D). ) To guide you freely.

The objective lens 5 of the optical pickup 56
The other end of the guide shaft 54 on the opposite side to the turntable 52 and both ends of the guide shaft 55 are respectively adjusted with an adjusting screw 70 so that the optical axis P of the optical disk 6 is perpendicular to the information recording surface of the optical disc D. , 71, 72 to adjust the position of the optical pickup 56 by moving the guide shafts 54, 55 in parallel with the surface of the chassis 51 or adjusting them by tilting them. ing.

The support piece 56 of the optical pickup 56
An engagement portion, that is, a nut member 64 is integrally attached to the optical pickup 56 at one end of the c and 56d sides, and the nut portion 64a is substantially parallel to the guide shaft 54 and is rotatable around an axis. The compression coil spring 6 is provided at the thread of the feed shaft, that is, the lead screw 65.
The elastic member 6 is urged and locked.
On the other hand, a spur gear 67 is coaxially fixed on the side of the lead screw 65 opposite to the turntable 52 so as to rotate integrally. Further, a spur gear 68 meshing with the spur gear 67 is connected to a rotating shaft of a feed motor 69. It is fixed to. By driving the feed motor 69, the lead screw 65 is rotated at an optimal gear ratio determined by the spur gear 67 and the spur gear 68, and the optical pickup 56 to which the nut member 64 is fixed is moved to the radius of the optical disc D. Sent in the direction. The lead screw 65 and the feed motor 6
The details of the feed mechanism of the optical pickup 56 composed of nine parts will be described later.

As shown in FIG. 1B, the optical disk D is mounted on a turntable 52 and rotated by a spindle motor 53 so that a laser beam emitted from an objective lens 56a of an optical pickup 56 is transmitted to an information recording surface of the optical disk D. And the return light reflected from the information recording surface according to the information is passed through the objective lens 56a again and received in the optical pickup 56,
It is possible to read information on the information recording surface of the optical disc D and record information on the information recording surface. Further, the optical pickup 5 follows the information recording surface of the optical disc D.
6 includes guide shafts 54, 5
5 has a controlled movement along its length.

Next, referring to FIG.
The feed mechanism of the optical pickup 56 composed of the feed motor 5 and the feed motor 69 and its assembled state will be described. 2A is a partially enlarged plan view of the lead screw 65 and the feed motor 69 in FIG. 1, and FIG. 2B is 2B-2 in FIG. 2A.
FIG.

2A and 2B, reference numeral 73 denotes one end of the lead screw 65 on the turntable 52 (see FIG. 1) side (hereinafter, simply referred to as one end of the lead screw 65).
A support member 74 for rotatably supporting the feed screw 69 is fixed to the feed motor 69 and the other end of the lead screw 65 opposite to the turntable 52 (hereinafter simply referred to as the other end of the lead screw 65). Department)
Is a pressing member for pressing the distal end surface 65a of the lead screw 65 protruding from the spur gear 67. The lead screw 6
At the other end of 5, a stepped portion 65b with a reduced diameter is formed, and the aforementioned spur gear 67 is fixed to the tip end side. Further, the tip surface 65a of the stepped portion 65b protruding from the spur gear 67 is a substantially spherical convex surface.

First, the bearing member 73 is formed in the surface of the chassis 51 in the height direction (the turntable 52 side, see FIG. 1). Square pillar-shaped body 73a
, A top plate 73b, and a holding portion 73c arranged on the lower surface of the chassis 51 so as to be connected to the body portion 73a so as to sandwich the chassis 51 for fixing the body portion 73a. W1 is a direction parallel to the surface of the chassis 51 and orthogonal to the axial direction of the lead screw 65, and has a width slightly larger than the diameter of one end of the lead screw 65. A cutout groove 73d having a width W1 is formed on the side of the top plate 73b on the pressing member 75 side. From the upper surface of the side wall of the body 73a on the pressing member 75 side, a notch groove 75i having a width of W1 and a width of W2 downward from the upper surface in the height direction is connected to the notch groove 73d formed in the top plate 73b. It is formed in length. And the inner wall surface 73 of the top plate 73b
g and an opening W2 ′ between the lower surface 73f of the notch groove 73i.
Is formed. Further, as shown in FIG. 2A, protrusions 73e, 73e projecting inward from both side walls in the width W1 direction of the notch groove 73d are provided, and the distance between the tips of the protrusions 73e, 73e is determined by a lead screw. One end of the lead screw 65 is formed so as to have a diameter substantially equal to the diameter of one end of the lead screw 65 so that the one end can rotate smoothly without play. Similarly, the distance of the opening W2 'shown in FIG. 2B is formed to be substantially equal to the diameter of the one end.

Next, referring to FIG. 2 and FIG.
4 will be described. FIG. 3 is a side view of the holder 74 seen from the direction of arrow 3 in FIG. 2A. The holder 74 is formed by resin molding, and has an L-shaped plate-shaped base portion 74a.
A first rectangular wall-shaped first side wall 74b erected on the base 74a, and a second rectangular substantially rectangular plate-shaped second side wall 74b partially connected to the first side wall 74b. Side wall 74c
And a substantially rectangular plate-shaped third side wall portion 74d connected to the second side wall portion 74c and juxtaposed to reinforce the second side wall portion 74c.

The first side wall 74b has a mounting surface 74b-1 on which the feed motor 69 is mounted and a through hole 74b-2 (FIG. 2A) formed in the mounting surface 74b-1 for projecting the rotation shaft of the feed motor 69. And the lead screw 65
A rectangular notch 74b-3 is formed at the side edge of the base portion 74a so as to have a height W3 from the upper surface and a cut depth of W4 (see FIG. 3A). And
The notch 74b-3 has contact surfaces 74b-4 and 74b-5. The length W4 is the length of the lead screw 65.
Is configured to be larger than the diameter of the stepped portion 65b.

The second side wall portion 74c has a contact surface 74c-1 formed on the upper surface thereof at a position facing the contact surface 74b-4 formed in the cutout portion 74b-3 of the first side wall portion 74b. are doing. The height of the contact surface 74c-1 from the base portion 74a is equal to the contact surface 74 formed on the first side wall portion 74b.
b-4 is the stepped portion 65b of the lead screw 65
Are arranged at a predetermined distance substantially equal to the diameter of the stepped portion 65b so as to be able to rotate smoothly without play.
Thus, the contact surfaces 74b-4, 74b-5, 74c-
1, the notch groove W5 is formed.

The mounting surface 74b of the holder 74 described above.
-1 (see FIG. 2A), the feed motor 69
6, and then the feed motor 6
The above-described spur gear 68 is fixed to the rotation shaft 9. The holder 74 thus assembled is provided with screws 77, 77.
(See FIG. 2A, omitted in FIG. 3).
1 is attached and fixed.

Next, the pressing member 75 will be described with reference to FIGS.
Will be described. The pressing member 75 has side walls 75 a-1, 7 formed by outsert molding on the surface of the chassis 51 in the height direction (on the turntable 52 side, see FIG. 1).
A body 75a surrounded on all sides by 5a-2, 75a-3, and 75a-4, and a chassis 51 for fixing the body 75a.
Is formed on the lower surface of the chassis 51 so as to be connected to the body portion 73a so as to sandwich the body portion. The body portion is formed by the body portion 75a and the holding portion 75b.

As shown in FIG. 2B, the side wall portion 75a
Arms 75c, 75c are juxtaposed so as to protrude into the body 75a from the connection between the holding member 75b and the holding portion 75b, and a thin plate-like support piece 75d is provided upward from the ends of the arms 75c, 75c. , 75d are integrally formed. In addition, support piece 7
At the upper ends of 5d and 75d, a rectangular plate-shaped pressing portion, that is, a pressing piece 75e, is integrally formed so as to face the inner wall surface of the side wall portion 75a-1. Further, from the surface of the pressing piece 75e on the side of the lead screw 65, a quadrangular prism-shaped protruding portion 75f having an inclined surface 75g at the tip is formed with a lead screw 6
A columnar locking portion 75h is formed so as to protrude from the surface opposite to the surface 5. The inclined surface 75g is formed such that its normal line is inclined toward the notch groove W5 shown in FIG. 3A. on the other hand,
A locking portion 75i is formed to protrude from the inner wall surface of the side wall portion 75a-1 so as to face a locking portion 75h formed on the pressing piece 75e.

In the pressing member 75 thus configured, the pressing pieces 75e supported by the support pieces 75d, 75d
Since the support pieces 75d, 75d are formed thin, they can be displaced in the direction of arrow R in FIG. 2B. The locking portion 75h provided on the pressing piece 75e and the side wall portion 75
The pressing piece 75e is turned by an arrow R by the urging force of the coil spring 78 fitted in a compressed state to the locking portion 75i provided on the a-1.
1 and the pressing piece 75e is pressed too much and the coil spring 78 is
The displacement is restricted to a predetermined position by stopper portions 75j, 75j so as not to come off from 5h, 75i.

The bearing member 73 and the holder 74 described above.
The method of incorporating the lead screw 65 into the pressing member 75 will be described with reference to FIGS. First, in a state where the holder 74 is not attached to the chassis 51, the stepped portion 65b of the lead screw 65 is inserted into the cutout groove W5 in the direction of arrow G shown in FIG. 6
7 engages with the spur gear 68 (see FIG. 3B). Next, one end of the lead screw 65 on the turntable 52 side is inserted into the opening W2 ′ of the bearing member 73 shown in FIG. 2B, and then the holder 74 is attached and fixed to the chassis 51. Then, the tip surface 6 of the stepped portion 65b of the lead screw 65
The inclined surface 7 formed on the protruding portion 75f of the pressing piece 75e at 5a
The pressing piece 75e is arranged so that 5g contacts.

In this state, as shown in FIG. 2B,
One end of the lead screw 65 is connected to the body 7 of the bearing member 73.
It is urged by the inner wall surface 73h of 3a to restrict its movement in the length direction. Further, as shown in FIG. 4, which is an explanatory view for explaining the function of the pressing piece 75e, the inclined surface 75g formed on the projection 75f of the pressing piece 75e
5 comes into contact with the distal end surface 65a of the stepped portion 65b on the other end side, whereby the distal end surface 65a is provided with a coil spring 7
8, the pressing force F inclined with respect to the axial direction of the lead screw 65 is urged, so that the pressing force F1 is divided in the radial direction of the lead screw 65 in the direction of the notch groove W5 together with the pressing force F1 in the axial direction of the lead screw 65. The pressure F2 acts, and the stepped portion 65b is urged in contact with the contact surface 74b-5 in the cutout groove W5. Therefore, the cutout groove W5 of the stepped portion 65b is pressed.
Is prevented, and backlash in the radial direction is also prevented.

As described above, according to the present embodiment, as shown in FIGS. 2 and 3, the stepped portion 65b of the lead screw 65 is inserted into and supported by the groove-shaped portion W5 provided in the holder 74. In this state, the pressing piece 75e that elastically urges the lead screw 65 in the longitudinal direction is provided with the inclined surface 75g that divides the other end of the lead screw 65 in the direction of insertion into the groove portion W5. Apart from the pressing piece 75e, a retaining member for preventing the stepped portion 65b of the lead screw 65 from coming out of the notch groove W5 is not required, so that the structure can be simplified and the coming-out prevention can be surely prevented. Further, since a retaining member is not required, the number of parts does not increase, so that the cost can be reduced.

As shown in FIG. 2, the pressing piece 75e is displaced in the axial direction of the feed shaft, and the pressing member 75 is provided with a coil spring 78 for urging the pressing piece 75e. Since the structure only needs to displace the piece 75e in only one direction, the structure can be further simplified.

Further, since the pressing member 75, the supporting piece 75d and the pressing piece 75e are made of resin integrally formed on the chassis 51 by outsert molding, the pressing member 75, the supporting piece 75d and the pressing piece 75e are formed by a single molding. At the same time, the pressing member 75 can be attached and fixed to the chassis 51 at the same time, and the cost can be further reduced.

In this embodiment, as shown in FIG. 2, one end of the lead screw 65 on the turntable 52 side is inserted into an opening W2 'of a bearing member 73 formed by outsert molding in a chassis. As a result, workability is good, and a separate member is not required for preventing one end of the lead screw 65 from coming off from the bearing member 73, so that the structure is simplified and cost reduction is achieved. It becomes possible.

[0044]

As described above, according to the present invention,
A turntable on which an optical disk is mounted on a chassis; an optical pickup for recording or reproducing data on or from the optical disk; and a guide unit for guiding the optical pickup in a radial direction of the optical disk. A feed member, which is provided with a spiral groove for engaging with the engaging portion and has a feed shaft rotatably driven around an axis arranged in parallel with the optical pickup, and a support member on which one end of the feed shaft is supported; An optical disc device, wherein a notch groove into which the other end is inserted and supported is provided in the chassis, and a pressing member for elastically pressing the other end of the feed shaft in the axial direction is provided in the chassis. The pressing member has a pressing portion that abuts on the other end of the feed shaft, and the pressing portion divides the other end of the feed shaft in the insertion direction into the notch groove. Since, it is not necessary to retaining member to prevent the feed shaft escapes from the separate notch groove and the pressing part, it simplifies the structure and, thereby cost.

Further, the pressing portion has an inclined surface, and the other end of the feed shaft comes into contact with the inclined surface.
The inclined surface surely divides the pressing force for urging the feed shaft in the direction of insertion into the notch groove, so that the feed shaft can be reliably prevented from coming off.

Further, since the pressing portion is displaced in the axial direction of the feed shaft and the pressing member is provided with an elastic member for biasing the pressing portion, if the pressing portion is displaced in only one direction. Well, the structure can be further simplified.

Further, the pressing member is a resin integrally formed on the chassis by outsert molding, and comprises a base portion and a support piece for supporting the pressing portion provided on the base portion. Since the locking portions with which the elastic members are engaged are respectively provided, the base portion, the support pieces and the pressing portions can be formed and molded and fixed to the chassis at the same time by a single molding, and the cost can be further reduced.

[Brief description of the drawings]

FIG. 1A is a plan view of an optical disc device according to an embodiment of the present invention, and FIG. 1B is a side view of the same.

FIG. 2 relates to an optical disk device according to an embodiment of the present invention;
FIG. 2A is a partially enlarged plan view of the lead screw 65 and the feed motor 69 in FIG. 1A, and FIG.
It is 2B sectional drawing.

FIG. 3 relates to an optical disk device according to an embodiment of the present invention;
It is a side view of the holder 74 part seen from arrow 3 of FIG. 2A.

FIG. 4 relates to an optical disk device according to an embodiment of the present invention;
It is explanatory drawing for demonstrating the effect | action of the pressing piece 75e.

FIG. 5 is a perspective view of a conventional optical disk device.

FIG. 6 is a partially exploded perspective view of a conventional optical disk device.

[Explanation of symbols]

 Reference Signs List 50 optical disk device 51 chassis 52 turntable 53 spindle motor 54, 55 guide shaft 56 optical pickup 56a objective lens 64 nut member 64a nut portion 65 lead screw 69 feed motor 70, 71, 72 adjusting screw 73 bearing member 74 holder W5 cutout groove 75 Pressing member 75d Supporting piece 75e Pressing piece 75f Projecting portion 75g Inclined surface 75h, 75i Spring locking portion 78 Coil spring

Claims (4)

[Claims] A turntable on which an optical disk is mounted on a chassis; an optical pickup for recording or reproducing data on and from the optical disk; and a guide means for guiding the optical pickup in a radial direction of the optical disk. An optical pickup is provided with an engaging portion, a spiral shaft for locking the engaging portion is formed, and a feed shaft rotatably driven around an axis is arranged in parallel with the optical pickup, and one end of the feed shaft is supported. And a notch groove in which the other end is inserted and supported is provided in the chassis, and a pressing member that elastically presses the other end of the feed shaft in the axial direction is provided in the chassis. Optical disc device, wherein the pressing member has a pressing portion that abuts on the other end of the feed shaft, and the pressing portion divides the other end of the feed shaft in the insertion direction into the notch groove. An optical disk device characterized in that it is compressed. 2. The optical disk device according to claim 1, wherein the pressing portion has an inclined surface, and the other end of the feed shaft comes into contact with the inclined surface. 3. The pressing member is displaced in the axial direction of the feed shaft, and the pressing member is provided with an elastic member for urging the pressing member. An optical disk device according to claim 1. 4. The pressing member is made of resin integrally formed on the chassis by outsert molding, and comprises a base portion, and a support piece provided on the base portion for supporting the pressing portion. 4. The optical disk device according to claim 3, wherein the pressing portion is provided with a locking portion with which the elastic member is engaged.