JP2006134433A - Optical head and optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical head which has a simple configuration and can enhance the accuracy of focusing and tracking without spending much time and labor for assembly and an optical disk device using the optical head. <P>SOLUTION: A wire spring 22 is covered by a damping material 213, and is bonded and fixed by an adhesive 221 to a bonding portion 212 of a supporting member 21. Further, its opposite ends are crooked and are connected by soldering to engaging portions 233 engaging with recessed parts 214 formed on side faces 211 of the supporting member 21. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to an optical disk apparatus capable of recording and / or reading data by irradiating light onto an optical disk, and more particularly to an optical head that irradiates light onto the optical disk.

In recent years, as an image, audio, or information recording medium, an optical disk that can be recorded and / or read by irradiating light is often used. As the optical disc, a CD (Compact Disc), a DVD (Digital Versatile Disc) and the like are widely used. An optical disc apparatus that records and / or reads data on the optical disc using the optical disc as a recording medium includes an optical head that irradiates a recording surface of the optical disc with laser light and detects reflected light.

FIG. 2 shows the layout of the optical head. As shown in FIG. 2, a laser light source Ld, a mirror Mr,
A collimator lens 3, an objective lens 4, a beam splitter Bs, and a light receiving element Pd are provided. The laser light emitted from the laser light source Ld is reflected by the mirror Mr and enters the collimator lens 3. The laser light incident on the collimator lens 3 is emitted as parallel light and enters the objective lens 4. The laser light incident on the objective lens 4 is irradiated onto the recording surface of the DVD medium Ds.

At this time, the laser beam is focused on the recording layer of the DVD medium Ds, and the optical axis and DV
Laser light is irradiated so that the recording layer of the D media Ds is perpendicular. Beam splitter B
s is a prism that transmits half of the incident laser light and reflects half of it, and guides the light reflected by the DVD medium Ds to the light receiving element Pd. The light receiving element Pd converts light into current, and reads data depending on the intensity of light.

In the optical disk device, the optical head provided with an optical element such as an objective lens,
It is necessary to move the optical disk surface in the vertical direction or the radial direction while following the deflection and inclination of the optical disk surface, and a lens holder that holds the objective lens is supported by a plurality of metal elastic members (wire springs). It has been. The lens holder is driven up and down (focus direction) and left and right (tracking direction).

FIG. 7 shows a side view of an example of a conventional optical head, and FIG. 8 shows a plan view of the optical head shown in FIG.
The optical head B shown in FIGS. 7 and 8 has a base 91 to which the collimator lens 3 is attached, and an actuator base 92 (hereinafter referred to as an act base 92) on which a lens holder 95 for holding the objective lens 4 is disposed. ing. The act base 94 is fixed to the base 91. A through hole 920 is formed in the act base 92, and the laser light emitted from the collimator lens 3 passes through the through hole 920 and enters the objective lens 4.

The lens holder 95 is formed with coils 954 and 955 for performing focusing for moving in the direction perpendicular to the optical disk and tracking for moving in the radial direction of the optical disk. A portion of the act base 92 where the lens holder 95 is disposed has a pair of permanent magnets 9.
24 and 924 are arranged, and a constant magnetic field is generated in the coils 954 and 955.
In this state, by passing current through the coils 954 and 955, the lens holder 95 is driven to perform focusing, tracking, and tilt.

The lens holder 95 is supported on a support member 921 provided on the act base 82 via a metallic wire spring 922. The wire spring 922 supports the lens holder 95 and is also used as a power transmission line for passing a current through the coils 954 and 955. Two wire springs 922 are arranged on each side surface of the lens holder 95, and the lens holder 95
The lens holder 95 is elastically supported by being attached to the side surface of the lens by soldering.

A gel-like vibration damping member 925 having viscoelasticity is disposed on the side surface of the support member 921.
The damping member 925 covers the wire spring 922. As a result, the wire spring 92
The damping 2 is suppressed by a damping member 925. A substrate 923 for transmitting power to the wire spring 922 is attached to the support member 921 on the surface opposite to the lens holder 95. The substrate 923 is fixed to the support member 921 with bolts 926. A through hole 927 through which the end of the wire spring 922 passes is formed in the substrate 923. Wire spring 9
The wire spring 922 and the support member 923 can be connected and fixed by soldering the end portion penetrating the through-hole 927 of 22 to the substrate 923.

The amount of movement of the lens holder 95 for focusing and tracking is determined by the wire spring 9.
It depends on the length of 22. More specifically, the moving amount of the lens holder 95 is determined by the length L2 of the wire spring 922 from the substrate 923 to the lens holder 95. In order to increase the accuracy of focusing and tracking, the length L2 of the wire spring 922 may be set to the same length. Here, the length of the wire spring 922 is a length L2 from the soldering portion of the lens holder 95 to the soldering portion of the through hole 927 of the substrate.
JP 2002-352451 A JP 2001-344783 A

However, the length L2 of the wire spring 922 is likely to change depending on the displacement of the shape of the substrate 923 attached to the support member 921, the displacement of the attachment position, and the manner of soldering, and each length of the wire springs 922 provided in a plurality is provided. It is very difficult to mount the unit so as to have a uniform length with high accuracy. Further, the through hole 9 of the substrate 923 attached to the support member 921.
27 must be manufactured so that the wire spring 922 can be passed through without bending or applying an excessive force to the wire spring 922 and attached to the support member 921. In this case, it is difficult to manufacture the substrate 923 and attach it to the support member 921.
It takes a lot of time and effort.

This requires high accuracy in the production and assembly of each member constituting the optical head, and accordingly, the time and labor required for the production of the optical head and the optical disc apparatus equipped with the optical head are increased. Manufacturing cost increases.

Accordingly, an object of the present invention is to provide an optical head that has a simple structure and can improve focusing and tracking accuracy without taking much time and labor for assembly, and an optical disk device using the optical head. And

To achieve the above object, the present invention provides an optical disk apparatus for recording and reading data by irradiating a rotating disk-shaped optical disk with a laser beam, and a spindle motor for rotating the optical disk; An optical head for irradiating the optical disk with laser light;
A signal processing device for processing a signal, an external connection unit for connecting a signal detected by the optical head and decoded by the signal processing device to an external video display unit, and a control unit The optical head irradiates a laser beam, a mirror that reflects the laser beam, a collimator lens that collimates the laser beam, and an objective lens that irradiates the optical disc with the laser beam. And a beam splitter that splits the light reflected by the optical disc, and a light receiving element that receives the light, and the collimator lens is supported by a base,
The objective lens is fixed to a lens holder, the lens holder is supported by an act base, the act base is fixed to the base, and the act base is a support member for supporting the lens holder; Two pairs of linearly formed wire springs fixed to the support member and elastically supporting the lens holder, a substrate attached to the support member, and a permanent magnet for generating a magnetic field inside the lens holder And
The lens holder positions a focusing coil for moving the lens holder in a direction perpendicular to the disk surface of the optical disk, a tracking coil for moving in a direction parallel to the disk surface, and the wire spring. A positioning member; and a wire attachment portion that is electrically connected to the focusing coil and the tracking coil and is attached by soldering the wire spring; and the support member is provided on both side surfaces of the wire spring. An adhesive part for adhering with an adhesive, a gel-like damping member that comes into contact with the wire spring and has viscoelasticity, and a concave part for arranging the substrate on both side surfaces, The substrate is attached to the surface of the support member opposite to the surface facing the lens holder, and both ends are bent. An engaging portion that engages with a recess provided on both side surfaces of the support member, and a land that is provided on the engaging portion and that is electrically connected to the wire spring by soldering. The power is supplied independently from the land to the focusing coil and the tracking coil via the wire spring, and the wire spring is fixed to the bonding portion of the support member so as to be paired with each other. It is characterized by.

According to this structure, since the said wire spring is adhere | attached and fixed to the adhesion part of the side surface of the said supporting member attached to the said act base, it can prevent that the operating range of the said wire spring changes by soldering. This makes it possible to make the lengths of the plurality of wire springs provided to be equal to each other, and to increase the accuracy of the operation of the lens holder.

In addition, since the wire spring can be bonded and fixed to the bonding portion without using any special member or technique, much time and labor are not required for manufacturing and assembly, and the cost can be reduced accordingly. Can do.

Since the focusing and tracking operations of the lens holder can be made highly accurate, it is possible to provide an optical disc apparatus in which reading of information on the optical disc with an optical head and writing of information on the optical disc are favorably performed.

In order to achieve the above object, the present invention provides an optical disk apparatus for recording and reading data by irradiating a rotating disk-shaped optical disk with laser light, and irradiating the optical disk with laser light. The optical head includes a laser light source that irradiates the laser light, a collimator lens that converts the laser light into parallel light, and an objective lens that irradiates the optical disk with the laser light. The collimator lens is supported by a base, the objective lens is fixed to a lens holder, the lens holder is supported by an act base, the act base is fixed to the base, and the act base is A support member for supporting the lens holder, and a linear member fixed to the support member and elastically supporting the lens holder One or more pairs of wire springs formed, a substrate attached to the support member, and a permanent magnet for generating a magnetic field inside the lens holder, the lens holder comprising the lens holder One or more coils for movement, a positioning member for positioning the wire spring, and electrically connected to the coil;
A wire attachment portion attached by soldering the wire spring, and the support member has an adhesion portion for adhering the wire spring to both side surfaces and a viscosity for suppressing vibration of the wire spring. An elastic gel-like damping member, and the substrate is attached to a surface of the support member opposite to the surface facing the lens holder, and is formed by bending both ends. An engaging portion that engages with a recess provided on both side surfaces of the support member, and a land that is provided in the engaging portion and is electrically connected to the wire spring by soldering, Electric power is independently supplied to the coil from the land through the wire spring, and the wire spring is fixed to the bonding portion of the support member so as to be paired with each other.

According to this structure, since the said wire spring is adhere | attached and fixed to the adhesion part of the side surface of the said supporting member attached to the said act base, it can prevent that the operating range of the said wire spring changes by soldering. This makes it possible to make the lengths of the plurality of wire springs provided to be equal to each other, and to increase the accuracy of the operation of the lens holder.

In addition, since the wire spring can be bonded and fixed to the bonding portion without using any special member or technique, much time and labor are not required for manufacturing and assembly, and the cost can be reduced accordingly. Can do.

In the above configuration, the coil may be a focus coil that moves the lens holder in a focus direction perpendicular to the surface of the optical disc, or a tracking coil that moves the lens holder in the radial direction of the optical disc. Moreover, it is not limited to these coils, The coil used for operation | movement of the said lens holder can be employ | adopted widely. It is preferable that the wire spring has a number capable of supplying power independently to each of the coils.

The optical disk device is not limited to such a DVD recording / reproducing device, CD reproducing device, CD-R recording / reproducing device, CD-RW recording / reproducing device, MD recording / reproducing device, LD reproducing device, etc. An apparatus that uses an optical disk, reads information from the optical disk, and / or records information on the optical disk can be widely cited.

To achieve the above object, the present invention provides a laser light source for irradiating a laser beam, a collimator lens that is supported by a base and makes the laser beam a parallel beam, and is fixed to a lens holder to irradiate the optical disc with the laser beam. An objective lens, the lens holder is supported by an act base, the act base is fixed to the base, and the act base is a support member for supporting the lens holder. A pair of linearly formed wire springs that are fixed to the support member and elastically support the lens holder, a substrate attached to the support member, and a magnetic field generated in the lens holder A permanent magnet, and the lens holder moves the lens holder in a direction perpendicular to the disk surface of the optical disk. A focusing coil Sutame, a tracking coil for moving in a direction parallel to the disk surface, a positioning member for positioning of the wire spring, connects the focusing coil and the tracking coil and electrically,
The wire spring is attached by soldering, and the support member is in contact with the wire spring and an adhesive part for adhering the wire spring to both sides with an adhesive. And a gel-like vibration damping member having viscoelasticity, and a concave portion for arranging the substrate on both side surfaces,
The substrate is attached to a surface of the support member opposite to the surface facing the lens holder, is formed by bending both end portions, and engages with recesses provided on both side surfaces of the support member. It has an engaging part and a land provided in the engaging part and electrically connected to the wire spring by soldering. From the land, the focusing coil and the tracking coil are connected to the focusing coil and the tracking coil, respectively. An optical head is provided in which power is supplied independently, and the wire springs are fixed to the bonding portions of the support member in pairs.

According to this structure, since the said wire spring is adhere | attached and fixed to the adhesion part of the side surface of the said supporting member attached to the said act base, it can prevent that the operating range of the said wire spring changes by soldering. This makes it possible to make the lengths of the plurality of wire springs provided to be equal to each other, and to increase the accuracy of the operation of the lens holder.

In addition, since the wire spring can be bonded and fixed to the bonding portion without using any special member or technique, much time and labor are not required for manufacturing and assembly, and the cost can be reduced accordingly. Can do.

To achieve the above object, the present invention provides a laser light source for irradiating a laser beam, a collimator lens that is supported by a base and makes the laser beam a parallel beam, and is fixed to a lens holder to irradiate the optical disc with the laser beam. The lens holder is supported by an act base, the act base is fixed to the base, the act base supporting the lens holder, and the support One or a plurality of linearly formed wire springs fixed to the member and elastically supporting the lens holder, a substrate attached to the support member, and a permanent magnet for generating a magnetic field inside the lens holder The lens holder includes one or more coils for moving the lens holder, and the wire holder. A positioning member that is electrically connected to the coil and attached by soldering the wire spring, and the support member has the wire spring on both side surfaces. An adhesive portion for bonding with an adhesive; and a gel-like vibration damping member having viscoelasticity that suppresses vibration of the wire spring; and the substrate faces the lens holder of the support member It is attached to the surface opposite to the surface, is formed by bending both end portions, and is provided in the engagement portion to engage with the recesses provided on both side surfaces of the support member, A land that is electrically connected to the wire spring by soldering, and the power is independently supplied from the land to the coil via the wire spring. Providing an optical head, characterized in that it is fixed so that pairs each bonding portion of the support member.

According to this structure, since the said wire spring is adhere | attached and fixed to the adhesion part of the side surface of the said supporting member attached to the said act base, it can prevent that the operating range of the said wire spring changes by soldering. This makes it possible to make the lengths of the plurality of wire springs provided to be equal to each other, and to increase the accuracy of the operation of the lens holder.

In addition, since the wire spring can be bonded and fixed to the bonding portion without using any special member or technique, much time and labor are not required for manufacturing and assembly, and the cost can be reduced accordingly. Can do.

In the above configuration, the coil may be a focus coil that moves the lens holder in a focus direction perpendicular to the surface of the optical disc, or a tracking coil that moves the lens holder in the radial direction of the optical disc. Moreover, it is not limited to these coils, The coil used for operation | movement of the said lens holder can be employ | adopted widely. It is preferable that the wire spring has a number capable of supplying power independently to each of the coils.

According to the present invention, it is possible to provide an optical head that has a simple structure and can improve focusing and tracking accuracy without taking much time and labor to assemble, and an optical disk apparatus using the optical head. it can.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a layout view of an optical disc apparatus according to the present invention. The optical disc apparatus shown in FIG.
It is a VD player. A DVD player PL shown in FIG. 1 includes a spindle motor Sp that rotates a DVD medium Ds, an optical head A that irradiates the DVD medium Ds with light and reads information, and a decoder that decodes a signal detected by the optical head A. Dc, the external connection part Oc for connecting with the monitor Mn which is an external display apparatus, and the control part Cont are provided.

The DVD player PL is controlled by the control unit Cont. When a user gives a command to play a DVD, first, the spindle motor Sp is driven to rotate the DVD medium Ds. The DVD medium Ds rotating from the optical head A is irradiated with laser light, and the reflected light is detected by the optical head A. A light receiving element Pd, which will be described later, provided in the optical head A converts detected light into an electrical signal. The electrical signal is sent to the decoder Dc, demodulated into a video signal, and monitored via the external connection portion Oc. The image is sent to Mn and displayed on the monitor Mn.

FIG. 2 shows an arrangement plan of an example of the optical head. The optical head A shown in FIG. 2 has substantially the same structure as the conventional one. That is, the laser light source Ld, the mirror Mr, the collimator lens 3, the objective lens 4, the beam splitter Bs, and the light receiving element Pd are included. The laser light emitted from the laser light source Ld is reflected by the mirror Mr, enters the collimator lens 3, changes into parallel light, and exits from the collimator lens 3. The laser beam emitted from the collimator lens 3 enters the objective lens 4 and is irradiated from the objective lens 4 onto the DVD medium Ds.

At this time, the laser beam is focused on the recording layer of the DVD medium Ds, and the optical axis and DV
Laser light is irradiated so that the recording layer of the D media Ds is perpendicular. Beam splitter B
s is a prism that transmits half of the incident laser light and reflects half of it, and guides the light reflected by the DVD medium Ds to the light receiving element Pd. The light receiving element Pd converts light into current, and reads data depending on the intensity of light. The irradiation order of the laser light to each member described above is not limited to this, and the order may be changed within a possible range.

FIG. 3 is a plan view of the optical head according to the present invention, and FIG. 4 is a side view of the optical head shown in FIG.
As shown in FIGS. 3 and 4, the optical head A includes a base 1 for supporting the collimator lens 3,
A lens holder 5 that holds the objective lens 4 and an act base 2 that is attached to the base 1 and elastically supports the lens holder 5 that holds the objective lens 4. A through hole 20 is formed in the act base 2, and laser light emitted from the collimator lens 3 passes through the through hole 20 and enters the objective lens 4.

The act base 2 applies a magnetic field to the space in which the support member 21, the linearly formed wire spring 22 fixed to the support member 21, the substrate 23 bonded and fixed to the support member 21, and the lens holder 5 are arranged. A pair of permanent magnets 24 for generating (not limited thereto,
A plurality of pairs of permanent magnets or a single permanent magnet). The support member 21 includes an adhesive portion 212 for bonding the convex wire spring 22 to the side surface 211, and an adhesive portion 2.
12, a gel-like damping member 213 that suppresses the vibration of the wire spring 22 and a recess 214 for attaching the substrate 23 are provided.

The wire spring 22 not only elastically supports the lens holder 5 but also is used as electric wiring for supplying electric power from the substrate 23 to a wire mounting portion 53 described later. Wire spring 2
2 is covered with a vibration damping member 213 and bonded and fixed to the bonding portion 212 of the support member 21 with an adhesive 221. A first land 234 and a second land 2 of the substrate 23 to be described later at the further end of the bonding portion 212.
35 and connected by soldering.

As shown in FIGS. 3 and 4, the substrate 23 includes a main body 231 bonded and fixed to the support member 21,
A wiring connection part 232 to which a wiring for supplying power not shown is connected, and a main body part 231.
And an engaging portion 233 that is vertically connected to both end portions of the support member 21 and engages with a recess 214 formed on the side surface 211 of the support member 21. The engaging portion 233 is disposed between the concave portion 214 and the wire spring 22. Here, the engaging portion 233 is adhesively fixed to the concave portion 214 with an adhesive.

Here, the substrate 23 is bonded to the support member 21 with an adhesive, but a fixing method that can reliably fix the substrate 23 to the support member 21 such as a method of fixing the substrate 23 to the support member 21 using a bolt is widely adopted. Can do. Although the engaging portion 233 is connected to the end of the main body portion 231 perpendicularly, the engaging portion 233 is not limited to this, and can be widely used at an angle capable of engaging with the recess 214. . Further, the engaging portion 233 is adhesively fixed to the concave portion 214, but is not limited thereto, and the wire spring 22 can press the engaging portion 233 against the concave portion 214 of the support portion 212. As long as the engaging portion 233 does not float or shift from the concave portion 214 when soldering, the engaging portion 233 may not be fixed to the concave portion 214.

A printed wiring is formed on the surface of the substrate 23. The engaging portion 233 includes a wire spring 2
The first land 234 and the second land 235 connected to the first land 23 are formed.
4. Different printed wirings are connected to the second lands 235 from the wiring connecting portions 232, respectively. The first land 234 and the second land 235 are respectively formed in pairs, one side being supplied with electric power and the other being grounded. Different wire springs 22 are arranged and soldered to the first land 234 and the second land 235, respectively. The first land 234 and the second land 235 that are grounded may be formed of one member.

The lens holder 5 has a through hole 51 for attaching the objective lens 4 at the center, a positioning portion 52 for positioning the wire spring 22 on the side surface 501, and the positioned wire spring 2.
And a wire attachment portion 53 for soldering 2. Further, in the lens holder 5, a focusing coil 54 for moving the lens holder 5 in the focus direction, that is, the direction indicated by the arrow ar1 in FIG. 4, and the lens holder 5 in the tracking direction, that is,
And a tracking coil 55 for moving in a direction indicated by an arrow ar2 in FIG.

The positioning portion 52 is formed with a through hole 521 through which the wire spring 22 passes for positioning. The wire attachment portion 53 is made of metal and is electrically divided into a first attachment portion 531 and a second attachment portion 532. The wire spring 22 has a through hole 521 in the positioning portion 52.
Is fixed to the wire attachment portion 53 by soldering. The first attachment portion 531 is electrically connected to the focusing coil 54, and the second attachment portion 532 is electrically connected to the tracking coil 55.

By supplying power from the wiring connection part 232 of the substrate 23 to the first land 234, power is supplied to the first attachment part 531 via the wire spring 22, and the focusing coil 54 attached to the first attachment part 531 is supplied to the focusing coil 54. Current can flow. By supplying electric power from the wiring connection part 232 to the second land 235, electric power is supplied to the second attachment part 532 via the wire spring 22, and current is passed through the tracking coil 55 attached to the second attachment part 532. be able to.

The focusing coil 54 and the tracking coil 55 are disposed inside the magnetic field generated by the pair of permanent magnets 24. When a current flows through the coil disposed in the magnetic field, Lorentz force is applied to the focusing coil 54 and the tracking coil 55. The lens holder 5 can be moved in the focus direction and / or the tracking direction by this Lorentz force. Since the wire spring 22 penetrates the damping member 213, the vibration of the lens holder 5 can be focused in a short time even if the force applied to the lens holder 5 is removed.

The amount of movement of the lens holder 5 during tracking and focusing varies depending on the length of the wire spring 22. Here, the length of the wire spring 22 is not the length from end to end of the wire spring 22 but from the bonding point 2121 of the bonding portion 212 of the support member 21 to the lens holder 5.
It is the length L to the positioning member 52.

FIG. 5 is a plan view of the act base constituting the optical head according to the present invention, and FIG. 6 is a side view of the act base shown in FIG. As shown in FIGS. 5 and 6, the act base 2, the support member 21, the base 23, and the permanent magnet 24 are assembled. The assembly jig 6 is attached in a state where the lens holder 5 is disposed in the space between the pair of permanent magnets 24. This
The act base 2 and the lens holder 5 can be temporarily fixed by the assembly jig 6 so that the positions of the act base 2 and the lens holder 5 become the positions after assembly. By temporarily fixing in this way, the length L from the positioning portion 52 of the lens holder 5 to the bonding point 2121 of the bonding portion 212 of the support member 21 can be accurately set by all the wire springs 22. . The length L of the wire spring 22 is not limited thereto, but is equal for all the wire springs 22.

An attachment hole 61 for attaching the wire spring 22 is formed in the assembly jig 6 in advance, and the wire spring 22 is arranged at the attachment position from the attachment hole 61. At this time,
The wire spring 22 passes through the through hole 521 of the positioning member 52 of the lens holder 5.
Further, the wire spring 22 is covered with a damping member 213. The wire spring 22 is firmly bonded and fixed to the bonding point 2121 of the bonding portion 212 using the adhesive 221.

Then, the first land 234 and the second land 235 of the substrate 23 and the wire spring 22 are connected and fixed by soldering. Further, the first mounting portion 531 and the second mounting portion 53 of the lens holder 5 are used.
2 and the wire spring 22 are connected and fixed by soldering. After confirming that the lens holder 5 is securely elastically supported by the wire spring 22, the assembly jig 6 is removed, and the assembly of the act base 2 is completed.

In the above embodiment, a DVD player is described as an example of an optical disk device, but the present invention is not limited to this, and information is read out by irradiating an optical disk with laser light, or information is recorded on a recordable optical disk. An optical disk device can be mentioned.

The optical head of the present invention can be applied to an optical disc apparatus that reads information by irradiating an optical disc such as a DVD, CD, or LD with laser light, or records information on a writable optical disc.

1 is a layout view of an optical disc device according to the present invention. FIG. FIG. 3 is a layout diagram of an example of an optical head. It is a top view of the optical head concerning the present invention. FIG. 4 is a side view of the optical head shown in FIG. 3. It is a top view at the time of the assembly of the optical head concerning this invention. It is a top view at the time of the assembly of the optical head concerning this invention. It is a top view of the conventional optical head. It is a side view of the conventional optical head.

Explanation of symbols

Ds Optical disk Mr Mirror Bs Beam splitter Ld Laser light source Pd Light receiving part 1 Base 2 Act base 21 Support member 212 Adhesive part 213 Damping member 22 Wire spring 23 Substrate 24 Permanent magnet 3 Collimator lens 4 Objective lens 5 Lens holder 51 Through hole 52 Positioning Member 53 Wire mounting part

Claims (8)

An optical disk apparatus for recording and reading data by irradiating a rotating disk-shaped optical disk with laser light,
A spindle motor that rotates the optical disc, an optical head that irradiates the optical disc with laser light, a signal processing device that processes signals, and a signal that is detected by the optical head and decoded by the signal processing device. An external connection unit for connecting the received signal to an external video display unit, and a control unit,
The optical head has a laser light source for irradiating laser light, a mirror for reflecting the laser light,
A collimator lens that collimates the laser beam, an objective lens for irradiating the optical disc with the laser beam, a beam splitter that splits the light reflected by the optical disc,
A light receiving element for receiving light,
The collimator lens is supported by a base, the objective lens is fixed to a lens holder, the lens holder is supported by an act base, and the act base is fixed to the base,
The act base is attached to a support member for supporting the lens holder, two pairs of wire springs that are fixed to the support member and elastically support the lens holder, and the support member. A substrate and a permanent magnet for generating a magnetic field inside the lens holder;
The lens holder positions a focusing coil for moving the lens holder in a direction perpendicular to the disk surface of the optical disk, a tracking coil for moving in a direction parallel to the disk surface, and the wire spring. A positioning member, and a wire attachment portion that is electrically connected to the focusing coil and the tracking coil and attached by soldering the wire spring;
The support member has an adhesive portion for adhering the wire spring to both side surfaces with an adhesive, a gel-like damping member that contacts the wire spring and has viscoelasticity, and the substrate is disposed on both side surfaces. And a recess of
The substrate is attached to a surface of the support member opposite to the surface facing the lens holder, formed by bending both ends, and engaged with recesses provided on both side surfaces of the support member. A joint portion and a land provided in the engagement portion and electrically connected to the wire spring by soldering;
Power is supplied independently to the focusing coil and tracking coil from the land via the wire spring,
An optical disc apparatus, wherein the wire springs are fixed to the bonding portions of the support member so as to be paired with each other. An optical disk apparatus for recording and reading data by irradiating a rotating disk-shaped optical disk with laser light, comprising an optical head for irradiating the optical disk with laser light,
The optical head includes a laser light source that irradiates the laser light, a collimator lens that collimates the laser light, and an objective lens that irradiates the optical disk with the laser light, and the collimator lens is a base. Supported, the objective lens is fixed to a lens holder, the lens holder is supported by an act base, and the act base is fixed to the base;
The act base is a support member for supporting the lens holder, one or more pairs of wire springs that are fixed to the support member and elastically support the lens holder, and the support member. A substrate to be attached and a permanent magnet for generating a magnetic field inside the lens holder;
The lens holder is electrically connected to one or a plurality of coils for moving the lens holder, a positioning member for positioning the wire spring, and the coil, and the wire spring is soldered. A wire mounting portion to be attached,
The support member has an adhesive part for adhering the wire spring to both side surfaces, and a gel-like damping member having viscoelasticity that suppresses vibration of the wire spring,
The substrate is attached to a surface of the support member opposite to the surface facing the lens holder, is formed by bending both end portions, and engages with recesses provided on both side surfaces of the support member. An engaging portion; and a land provided in the engaging portion, electrically connected to the wire spring by soldering,
Power is supplied to the coil independently from the land via the wire spring,
An optical disc apparatus, wherein the wire springs are fixed to the bonding portions of the support member so as to be paired with each other. The optical disk apparatus according to claim 2, wherein the coil is a focus coil that moves the lens holder in a focus direction perpendicular to a surface of the optical disk. 4. The optical disc apparatus according to claim 2, wherein the coil is a tracking coil that moves the lens holder in a radial direction of the optical disc. A laser light source for irradiating a laser beam; a collimator lens supported by a base for collimating the laser beam; and an objective lens fixed to a lens holder for irradiating the optical disc with the laser beam. The lens holder is supported by an act base, and the act base is fixed to the base.
The act base is attached to a support member for supporting the lens holder, two pairs of wire springs that are fixed to the support member and elastically support the lens holder, and the support member. A substrate and a permanent magnet for generating a magnetic field inside the lens holder;
The lens holder positions a focusing coil for moving the lens holder in a direction perpendicular to the disk surface of the optical disk, a tracking coil for moving in a direction parallel to the disk surface, and the wire spring. A positioning member, and a wire attachment portion that is electrically connected to the focusing coil and the tracking coil and attached by soldering the wire spring;
The support member has an adhesive portion for adhering the wire spring to both side surfaces with an adhesive, a gel-like damping member that contacts the wire spring and has viscoelasticity, and the substrate is disposed on both side surfaces. And a recess of
The substrate is attached to a surface of the support member opposite to the surface facing the lens holder, is formed by bending both end portions, and engages with recesses provided on both side surfaces of the support member. An engaging portion; and a land provided in the engaging portion, electrically connected to the wire spring by soldering,
Power is supplied independently to the focusing coil and tracking coil from the land via the wire spring,
An optical head, wherein the wire springs are fixed to the bonding portions of the support member in pairs. A laser light source that irradiates laser light; a collimator lens that is supported by a base and that collimates the laser light; and an objective lens that is fixed to a lens holder and irradiates the optical disk with the laser light, The lens holder is supported by an act base, and the act base is fixed to the base.
The act base is a support member for supporting the lens holder, one or more pairs of wire springs that are fixed to the support member and elastically support the lens holder, and the support member. A substrate to be attached and a permanent magnet for generating a magnetic field inside the lens holder;
The lens holder is electrically connected to one or a plurality of coils for moving the lens holder, a positioning member for positioning the wire spring, and the coil, and the wire spring is soldered. A wire mounting portion to be attached,
The support member has an adhesive portion for adhering the wire spring to both side surfaces with an adhesive, and a gel-like damping member having viscoelasticity that suppresses vibration of the wire spring,
The substrate is attached to a surface of the support member opposite to the surface facing the lens holder, is formed by bending both end portions, and engages with recesses provided on both side surfaces of the support member. An engaging portion; and a land provided in the engaging portion, electrically connected to the wire spring by soldering,
Power is supplied to the coil independently from the land via the wire spring,
An optical head, wherein the wire springs are fixed to the bonding portions of the support member in pairs. The optical head according to claim 6, wherein the coil is a focus coil that moves the lens holder in a focus direction perpendicular to a surface of the optical disc. 8. The optical head according to claim 6, wherein the coil is a tracking coil that moves the lens holder in a radial direction of the optical disc.

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