JPH0817070A - Coil connecting jig and method for manufacturing objective lens driving device using the coil connecting jig - Google Patents

Abstract

(57) [Abstract] [Purpose] A coil connecting jig used in a method of manufacturing an objective lens driving device that constitutes an optical pickup device in which information signals are accurately written and / or read, and the coil connecting jig. Provided is a method of manufacturing an objective lens driving device using the. A detachable portion 4h that is attachable to and detachable from a winding portion of a drive coil of an objective lens driving device, and a bobbin of the objective lens driving device from the detachable portion 4h when the detachable portion 4h is attached to the drive coil. Using a coil connecting jig that extends so as to be opposed to the electrode portion provided in the above, and that has extension portions 4a to 4f with which the tip ends of the lead wires of the drive coil are interlocked, The mounting portion of the coil connecting jig is attached to the winding portion of the drive coil, the lead wire of the drive coil is positioned on the electrode portion of the bobbin, and the tip portion of the lead wire is fixed to the coil connecting jig. It is wound and held on the extending portions 4a to 4f of the tool, and the electrode portion and the lead wire are connected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil connecting jig and a method of manufacturing an objective lens driving device using the coil connecting jig, and in particular, an objective lens constituting an optical pickup device used in an optical disk player device. The present invention relates to a coil connecting jig used in manufacturing a driving device and a method for manufacturing an objective lens driving device using the coil connecting jig.

[0002]

2. Description of the Related Art Discotic recording media (hereinafter referred to as optical discs) such as optical discs, magneto-optical discs, etc. configured to perform optical writing and / or reading of information signals have been put into practical use today. There is. As such an optical disc, for example, there is one which has a disc substrate made of a transparent synthetic resin such as polycarbonate and a metal thin film such as aluminum adhered to the disc substrate. In this optical disc, fine irregularities corresponding to information signals, so-called pits, are formed on the disc substrate by means such as injection molding. Then, the metal thin film follows the pits,
The signal recording surface is formed by being formed in a fine concavo-convex shape corresponding to the information signal.

A disc player device is used to record and / or reproduce information signals on such an optical disc. This disc player device is configured to have a rotation operation device for rotating the optical disc and an optical pickup device for writing and / or reading an information signal to / from the optical disc. That is, in this disc player device, the optical disc is rotated by the rotation operating device, and
Writing and / or reading of an information signal is performed with the signal recording surface facing the objective lens of the optical pickup device.

The optical pickup device includes a light source such as a laser diode, a predetermined optical device for guiding a light beam emitted from the light source, an objective lens for condensing the light beam on the signal recording surface of the optical disc, and the signal recording surface. It is configured to have a photodetector or the like for detecting the reflected light flux. This optical pickup device is configured such that the light source, the optical device, the photodetector, and the like are built in an optical block portion, and the objective lens is supported via an objective lens driving device attached to the optical block portion. Has been done.

This objective lens driving device is made up of a support holder fixedly supported by the optical pickup device and a magnetic material such as iron, and is a so-called surface wobbling direction of the optical disk rotated by the rotation operation device. A yoke that is provided upright on the base and is integrally combined with the support holder, and the objective lens are integrally provided and supported by the support holder so as to be movable in the focusing direction and the tracking direction which is the so-called eccentric direction of the optical disk. A bobbin, a focus coil wound around the magnet of the yoke and provided so as to be interlocked with the bobbin in the focusing direction, and a tracking coil wound in the tracking direction so as to be interlocked with the bobbin in the tracking direction. Is composed of .

The objective lens drive device applies a drive current to the drive coil composed of the focus coil and the tracking coil so that the objective lens follows the fluctuations of the optical disc in the focusing direction and the tracking direction. Drive the drive coil in the focusing direction and the tracking direction, and the light flux emitted from the objective lens combined with the drive coil through the bobbin is always focused on the signal recording surface of the optical disc. To adjust the objective lens.

Therefore, in the optical disc player device, the objective lens driving device of the optical pickup device follows the surface wobbling and eccentricity of the optical disc, and the optical pickup device writes and / or writes an information signal on the signal recording surface of the optical disc. Read.

[0008]

By the way, the bobbin is provided with an electrode portion to which power is supplied from the support holder side fixedly supported by the optical pickup device. An end portion of a drive coil wound around the objective lens driving device is soldered to the electrode portion, and a drive current is applied to the drive coil.

Further, since the information signal on the signal recording surface of the optical disc which is rotated by the rotation operating device is formed of fine irregularities, the objective lens driving device for adjusting the objective lens to the wobbling and eccentricity of the optical disc. Is required to maintain the parallelism of the objective lens with high accuracy and to control the position of the objective lens with high accuracy, and is adjusted in the designing or assembling process.

However, in spite of the above adjustment, soldering for connecting the drive coil and the electrode portion provided on the bobbin requires a high weight density of the solder, and is extremely uniform in shape, size and the like. Have difficulty.

As described above, since the shape and size of the soldering are not formed uniformly, the center of gravity of the bobbin is likely to be displaced and the parallelism of the bobbin is highly accurate, especially in a small objective lens driving device. Not maintained. For this reason, the light source is condensed from the focusing direction, the light in the focusing direction is weakened, and the light source is easily diverged in an unnecessary direction, so that the information signal can be accurately written and / or read by the optical pickup device. There was a problem that it was not done.

In addition, the soldered bobbin causes a shift in the center of gravity, a resonance frequency of the bobbin shifts, and vibration easily occurs, which makes it difficult to control the position of the objective lens with high accuracy, and thus the optical pickup. The problem is that the information signals are not written and / or read accurately in the device.

In view of the above problems, the present invention provides a coil connecting jig used in a method of manufacturing an objective lens driving device which constitutes an optical pickup device in which an information signal is accurately written and / or read, and this. An object of the present invention is to provide a method for manufacturing an objective lens driving device using a coil connecting jig.

[0014]

In the coil connecting jig according to the present invention, an attaching / detaching portion which is attachable / detachable to / from a winding portion of a drive coil of an objective lens driving device, and the attaching / detaching portion is attached to the drive coil. At this time, an extension portion is provided which extends from the attachment / detachment portion so as to face the electrode portion provided on the bobbin of the objective lens driving device, and which extends with the tip end portion of the lead wire of the drive coil. Become.

A method for manufacturing an objective lens driving device using the above-mentioned coil connecting jig according to the present invention is a jig for mounting a coil connecting jig attaching / detaching portion on a winding portion of a drive coil of the objective lens driving device. The mounting step and the leading end of the lead wire of the drive coil are positioned on the electrode portion provided on the bobbin of the objective lens driving device so that the conduction portion formed on the lead wire of the drive coil is positioned on the jig for coil connection The coil holding step of winding and holding the extended portion of the bobbin, the connecting step of connecting the electrode portion provided on the bobbin and the conducting portion formed on the lead wire of the drive coil, and the connecting step are performed. The vicinity of the electrode portion of the lead wire of the drive coil extending from the electrode portion of the bobbin to the extending portion of the coil connecting jig wound and held in the coil holding step is cut to form the coil connecting jig. The driving carp And a desorption step of desorbing from the winding portion.

[0016]

The coil connecting jig according to the present invention is attached to the drive coil of the objective lens driving device by the attaching / detaching portion, and the drive coil is mounted on the electrode portion provided on the bobbin of the objective lens driving device by the extension portion. The leading end portion of the drive coil can be wound and held so that the conducting portion formed in the.

In the method of manufacturing an objective lens driving device using the above-mentioned coil connecting jig according to the present invention, the coil connecting jig is attached to the drive coil of the objective lens driving device in the jig attaching step, and the coil holding step is performed. In order to wind and hold the driving coil around the objective lens driving device so that the conducting portion formed in the driving coil is provided on the electrode portion provided on the bobbin of the objective lens driving device, the connecting step The shape and weight of the connecting portion between the electrode portion and the conducting portion, which are connected by, are easily formed uniformly.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings.

The objective lens driving device 60 according to the present invention is
A light beam emitted from a semiconductor laser as a light source is incident, and the incident light beam is recorded with an information signal such as a musical tone signal, or an objective lens 34 for converging and irradiating the recorded optical disc on the recorded optical disc is used. It is driven and displaced in the focusing direction which is a direction parallel to the optical axis of 34 or in the tracking direction which is a direction orthogonal to the optical axis of the objective lens 34.

As shown in FIGS. 1, 2 and 3, the objective lens driving device 60 includes a bobbin 30 to which an objective lens 34 is attached, and the bobbin 30 to which the objective lens 34 is attached.
A pair of suspensions 13a and 14a and suspensions 15a and 16a that are displaceably supported in two axial directions parallel to the optical axis and orthogonal to the optical axis.
And a support holder 40 that fixedly supports the pair of suspensions 13a and 14a and the suspensions 15a and 16a, and a yoke 51 that constitutes a magnetic circuit unit 50 to which the support holder 40 is attached, as main constituent members. .

The bobbin 30 constituting the objective lens driving device 60 is formed as a synthetic resin molded body as shown in FIG. On one end side of this bobbin 30,
An objective lens mounting portion 32 formed as a substantially disk-shaped protruding portion is provided. This objective lens mount 3
2 is formed so as to project upward from the upper edge of one end side of the bobbin main body 31, and has a lens mounting hole 33 formed in the center thereof. The objective lens 34 is mounted so that the outer peripheral edge side is locked to the locking step formed on the inner peripheral edge of the lens mounting hole 33 so that the upper end surface does not project from the lens mounting hole 33. .

Further, as shown in FIGS. 2 and 3, the objective lens 34 is driven and displaced in a direction parallel to the optical axis in the substantially central portion of the bobbin main body 31 in cooperation with the magnetic field of the magnetic circuit portion 50. A focusing coil 1 which is a first coil for generating a driving force is attached, and a pair of rising pieces 52 are formed so as to rise from the yoke 51 so as to face each other,
An opening 35 into which 53 is inserted is opened.

The opening portion 35 forms a coil attachment portion 36 in a wide portion extending from the substantially central portion of the bobbin main body 31 to the other end side. From this coil attachment portion 36 to the objective lens attachment portion 3
A magnet 54 attached to one rising piece 52 formed on the yoke 51 at a portion extending from one end side where the 2 is projected.
Is used as the magnet insertion portion 37.

The opening 3 provided on the bobbin 30
The focusing coil 1 for generating a driving force for driving and displacing the objective lens 34 in the direction parallel to the optical axis in combination with the magnetic field from the magnet 54 that configures the magnetic circuit unit 50 is mounted on the coil mounting unit 36 of FIG. As shown in FIG. 2, when mounted on the bobbin 30, the winding direction is made parallel to the optical axis of the objective lens 34 mounted on the bobbin 30,
The coil mounting portion 36 is wound into a rectangular tubular shape having a size substantially corresponding to the size of the coil mounting part 36. Then, as shown in FIG. 3, the focusing coil 1 is disposed so as to be positioned on the other end side of the bobbin 30 and fit into the coil mounting portion 36. That is, the focusing coil 1 is
The coil mounting portion 36 is fitted and disposed in the coil mounting portion 36 such that the outer peripheral surface of the coil mounting portion 36 is in contact with the other end surface of the coil mounting portion 36. The focusing coil 1 is integrally mounted on the bobbin 30 by bonding the outer peripheral surface of the coil mounting portion 36 facing the inner peripheral surface with an adhesive.

Further, the magnetic circuit portion 5 is provided on the outer peripheral surface side of the focusing coil 1 mounted in the coil mounting portion 36.
A pair of tracking coils 2 and 3 which are second coils for generating a driving force for driving and displacing the objective lens 34 in the direction orthogonal to the optical axis in combination with the magnetic field of 0 are attached.
One side surface 2k, 3k of the winding portions 2g, 3g of the tracking coils 2, 3 is one side surface parallel to the optical axis of the objective lens 34 of the winding portion 1g of the focusing coil 1 wound in a rectangular tubular shape. And, it is attached in parallel on the one side surface 1k exposed to the magnet insertion portion 37 side of the opening portion 35.

The winding portions 2g and 3g of the tracking coils 2 and 3 are attached to the bobbin 30 when they are attached to the winding portion 1g of the focusing coil 1 on its side surface 1k. It is wound so as to have a portion parallel to the optical axis of the objective lens 34. Specifically, as shown in FIG. 2, the tracking coils 2 and 3 are wound in a flat rectangular shape and have linear portions that are parallel to the optical axis of the objective lens 34 at least on opposite sides. It is wound around.

When these tracking coils 2 and 3 are mounted on one side surface 1k of the winding portion 1g of the focusing coil 1, the objective lens 3 mounted on the bobbin 30 is provided.
4 may be wound so as to have a portion that is parallel to the optical axis of 4, and may be wound in an elliptical shape in which opposite sides are linear. The pair of tracking coils 2 and 3 are attached and bonded to one side surface 1k of the winding portion 1g of the focusing coil 1 using an adhesive.

By the way, the winding portion 1g of the focusing coil 1 and the winding portion 2g of the tracking coils 2 and 3,
3 g are attached to form the drive coil 10 according to the present invention.

The focusing coil 1 and the tracking coils 2 and 3 wound in the parallel rectangular shape are made of copper and have a small diameter, and are made of varnish paint or the like to insulate the conductor and prevent rust. It is configured by winding a coated wire having a coating film coated on the surface.

The focusing coil 1 has a winding portion 1 in which a conductive wire coated with a coating film is wound as shown in FIG.
g, a lead wire 1h on one end side, and a lead wire 1i on the other end side. The lead wire 1h on one end side of the focusing coil 1 has an end portion 1a and a tip end portion 1c, and the lead wire 1i on the other end side is an end portion 1b and a tip end portion 1c.
d.

Further, the tracking coils 2, 3
Is a winding portion 2g, 3g around which a conductive wire coated with a coating film is wound as shown in FIG. 2 and lead wires 2h, 3h on one end side.
And lead wires 2i, 3i on the other end side.
Lead wires 2 on one end side of the tracking coils 2 and 3
h and 3h have end portions 2a and 3a and tip portions 2c and 3a, and the lead wires 2i and 3i on the other end side are the end portions 2 and 3.
It has b, 3b and tip parts 2d, 3d.

Lead wires 1h, 1i of the drive coil 10
End portions 1a, 1b, lead wires 2h, 2i end portions 2a, 2
b and the coating films coated on the end portions 3a and 3b of the lead wires 3h and 3i are removed to form conductive portions that can conduct electricity.

In the drive coil 10 in which a conducting portion is formed in each lead wire, the attaching / detaching portion 4h of the coil connecting jig 4 shown in FIG. 4 is provided inside the winding portion 1g of the focusing coil 1 of the drive coil 10. Is installed.

The coil connecting jig 4 is made of plastic or the like and has a substantially rectangular parallelepiped shape.
detachable part 4h detachable inside g and electrode part 11b provided on bobbin 30 from detachable part 4h when detachable part 4h formed of wire or the like is attached to winding part 1g.
Extension parts 4a, 4b, 4c, 4d, 4 extending so as to be opposed to 2b, 13b, 14b, 15b, and 16b.
e and 4f.

As shown in FIG. 5, the drive coil 10 to which the attachment / detachment portion 4h of the coil connecting jig 4 is attached has the lead wires 1h and 1i of the drive coil 10 whose tip portions 1c and 1d are extended portions 4a and 4b. It is wound and held. Further, the tip ends 2c and 2d of the lead wires 2h and 2i are wound around and held by the extended portions 4c and 4d. Similarly, the tip portions 3c and 3d of the lead wires 3h and 3i are wound around and held by the extended portions 4a and 4b.

Lead wires 1h, 1 of this drive coil 10
tip portions 1c, 1d, 2 of i, 2h, 2i, 3h, 3i
Coil connection jig 4 in which c, 2d, 3c and 3d are wound
The extended portions 4a, 4b, 4c, 4d, 4e, and 4f of FIG.
As shown in FIG. 3, the drive coil 10 is mounted in the coil mounting portion 36 of the bobbin 30 by being extended in a direction orthogonal to the winding direction of the winding portion 1g so that it can be mounted inside the winding portion 1g. .

After mounting the drive coil 10 on the coil mounting portion 36 of the bobbin 30, the extended portions 4a, 4b, 4c, 4d, 4e, 4f of the coil connecting jig 4 are attached to the drive coil 10 as shown in FIG. The lead wire 1h, 1i, 2 of the drive coil 10 is bent in a direction parallel to the winding direction of the winding portion 1g of
end portions 1a, 1b, 2a, 2b of h, 2i, 3h, 3i,
The conducting portions formed on 3a and 3b are connected to the electrode portions 11b, 12b, 13b, 14b and 15b provided on the bobbin 30,
16b so as to be located above the end portions 1a, 1b,
Conductive portions formed on 2a, 2b, 3a and 3b are welded by irradiating the electrode portions 11b, 12b, 13b, 14b, 15b and 16b with laser light.

Lead wires 1h, 1 of this drive coil 10
end portions 1a, 1b, 2a of i, 2h, 2i, 3h, 3i,
Conductive parts formed on 2b, 3a, 3b and electrode parts 11b, 12b, 13b, 14b, 15 provided on the bobbin 30.
After welding b and 16b, the lead wire 1 extending from the welded portion formed by this welding to the holding portion held by the winding.
The vicinity of each of the electrode portions h, 1i, 2h, 2i, 3h, 3i is cut.

After cutting the unnecessary portions of the lead wires, the extended portions 4a, 4b, 4c, 4d, 4e of the coil connecting jig 4 are
4f is bent so as to extend in a direction orthogonal to the winding direction of the winding portion 1g of the drive coil 10, and the coil connecting jig 4 is removed from the drive coil 10.

Here, the suspensions 13a and 14 are
The a and the suspensions 15a and 16a are formed such that the surfaces of the conductors having flexibility in the biaxial directions of the focusing direction and the tracking direction are covered with an insulating film and are displaceable in the biaxial directions. This suspension 13a, 1
One ends of the 4a and the suspensions 15a and 16a are supported by the support holder 40, and the back surfaces of the electrode parts 13b and 14b and the electrode parts 15b and 16b provided at the other ends are bonded to the bobbin 30. The electrode portions 13b and 14
Power is supplied from the support holder 40 side to the front side of b and the electrode portions 15b and 16b.

Through the above steps, the lead wires 1h and 1i of the focusing coil 1 are connected to the electrode portions 11b and 12b, the lead wires 2h and 2i of the tracking coil 2 are connected to the electrode portions 13b and 14b, and the tracking coil 3 is formed.
The lead wires 3h, 3i of are connected to the electrode portions 15b, 16b.

Since the above-mentioned connecting portion is formed by welding instead of soldering, the connecting portion is formed in a uniform shape and size. Therefore, the bobbin 30 is arranged in the objective lens driving device with good weight balance.

Therefore, the optical pickup device can accurately write and / or read the information signal.

Further, the lead wires 1h, 1 of the drive coil 10
The tip portions of i, 2h, 2i, 3h, and 3i are held by the coil connecting jig 4 by winding, and then the lead wire and the electrode portion provided on the bobbin are connected by welding. Even if the device 60 is miniaturized or the lead wire is composed of a covered wire having a fine diameter, the connection is easily performed, and it is easy to cope with the automation of the connection.

As described above, each lead wire of the drive coil 10 attached to the bobbin 30 supported by the support holder 40 is connected to the power source side through the support holder 40. After this connection, the rising piece 52 and the magnet 54 provided on the yoke 51 forming the magnetic circuit 50 are connected to the bobbin 3.
0, and at the same time, the rising piece 53 provided on the yoke 51 is inserted into the focusing coil 1 of the drive coil 10 attached to the bobbin 30. The yoke 51 is combined to form an objective lens driving device.

Next, a second embodiment of the present invention will be described. In the second embodiment, when the electrode portion provided on the bobbin 30 and the electrode portion formed on the lead wire of the drive coil 10 are connected, the inside of the winding portion 1g of the focusing coil 1 of the drive coil 10 is The case where the detachable part 5h of the coil connecting jig 5 shown in FIG.
In this description, the description of the same steps as those in the first embodiment will be omitted.

The coil connecting jig 5 is integrally formed by sheet metal working, and the winding portion 1g of the drive coil 10 is formed.
A detachable attachment / detachment portion 5h inside and an engagement portion for retaining the attachment / detachment portion 5h so as to sandwich the upper end of the winding portion 1g when the attachment / detachment portion 5h is attached to the winding portion 1g. Lock 5l
And the electrode part 2 provided on the bobbin 30 from the attaching / detaching part 5h.
Extensions 5a, 5b, 5c, 5 extending to face 1b, 22b, 23b, 24b, 25b, and 26b.
d, 5e, and 5f.

The wirings 21a and 22a have conductor surfaces covered with an insulating film, one end of which is supported by the support holder 40,
The back surfaces of the electrode portions 21b and 22b provided at the other end are bonded to the bobbin 30. The electrode portions 21b and 22b
Power is supplied to the front side of the above from the support holder 40 side.

In addition, the suspensions 23a, 24
The a and the suspensions 25a and 26a are formed so that the surfaces of the conductors having flexibility in the biaxial directions of the focusing direction and the tracking direction are covered with an insulating film and are displaceable in the biaxial directions. This suspension 23a, 2
4a and the suspensions 25a and 26a have one ends supported by the support holder 40, and the back surfaces of the electrode portions 23b and 24b and the electrode portions 25b and 26b provided at the other ends are bonded to the bobbin 30. The electrode portions 23b, 24b,
Power is supplied from the side of the support holder 40 to the front sides of the electrodes 25b and 26b.

The coil connecting jig 5 includes the extension portion 5a,
5b, 5c, 5d, 5e, and 5f are extended so that they can be mounted inside the winding portion 1g of the drive coil 10, and the locking lock 5
1 is attached to the drive coil 10 by being locked so as to sandwich the peripheral edge on the upper side of the winding portion 1g.

In the drive coil 10 to which the attachment / detachment portion 5h of the coil connecting jig 5 is attached, as shown in FIG. 9, the lead wires 1h and 1i of the drive coil 10 have distal ends 1c and 1d extended portions 5a and 5b. It is wound and held. Further, the tip ends 2c and 2d of the lead wires 2h and 2i are wound around and held by the extended portions 5c and 5d. Similarly, the tip portions 3c and 3d of the lead wires 3h and 3i are wound around and held by the extended portions 5a and 5b.

Lead wires 1h, 1 of this drive coil 10
tip portions 1c, 1d, 2 of i, 2h, 2i, 3h, 3i
Coil connection jig 5 in which c, 2d, 3c and 3d are wound
The extended portions 5a, 5b, 5c, 5d, 5e, 5f of FIG.
As shown in FIG. 5, the winding portion 1g is in a state of being extended in a direction orthogonal to the winding direction, and in this state, the coil attaching portion 36 of the bobbin 30 is mounted.

After mounting the drive coil 10 on the coil mounting portion 36 of the bobbin 30, as shown in FIGS. 10 and 11, the extended portions 5a, 5b, 5c, 5d, 5e of the coil connecting jig 5,
5f is bent in a direction parallel to the winding direction of the winding portion 1g of the drive coil 10, and the lead wire 1 of the drive coil 10 is bent.
end portions 1a, 1b of h, 1i, 2h, 2i, 3h, 3i,
The conductive portions formed on 2a, 2b, 3a, 3b are connected to the electrode portions 21b, 22b, 23b, 24 provided on the bobbin 30.
b, 25b, 26b, and the conducting portions formed on the end portions 1a, 1b, 2a, 2b, 3a, 3b are provided on the electrode portions 21b, 22b, 23b, 24b, 25.
It is crimped so as to be connected to b and 26b.

Lead wires 1h, 1 of this drive coil 10
end portions 1a, 1b, 2a of i, 2h, 2i, 3h, 3i,
Conductive portions formed on 2b, 3a, 3b and electrode portions 21b, 22b, 23b, 24b, 25 provided on the bobbin 30.
After crimping b and 26b, the lead wire 1 extending from the crimping portion formed by the crimping to the holding portion held by the winding.
The vicinity of each of the electrode portions h, 1i, 2h, 2i, 3h, 3i is cut.

After cutting the lead wires at the unnecessary portions, the extended portions 5a, 5b, 5c, 5d, 5e of the coil connecting jig 5 are
5f is bent so as to extend in a direction orthogonal to the winding direction of the winding portion 1g of the drive coil 10, and the locking lock 5l is detached from the upper side of the winding portion 1g. The coil connecting jig 5 is removed from the drive coil 10.

Through the above steps, the lead wires 1h and 1i of the focusing coil 1 are connected to the electrode portions 21b and 22b, the lead wires 2h and 2i of the tracking coil 2 are connected to the electrode portions 23b and 24b, and the tracking coil 3
The lead wires 3h and 3i are connected to the electrode portions 24b and 25b.

Since the above-mentioned connecting portion is formed by pressure bonding instead of soldering, the shape and size of the connecting portion are formed uniformly. Therefore, the bobbin 30 is arranged in the objective lens driving device with good weight balance.

Therefore, the information signal can be accurately written and / or read by the optical pickup device.

Further, the lead wires 1h, 1 of the drive coil 10
The tip portions of i, 2h, 2i, 3h, and 3i are held by being wound around the coil connecting jig 5, and then the lead wire and the electrode portion provided on the bobbin are connected by crimping or the like. Even if the lens driving device 60 is downsized or the lead wire is formed of a covered wire having a fine diameter, the connection is easily performed, and it is easy to handle the connection automatically.

Next, a third embodiment of the present invention will be described. In the third embodiment, when the electrode portion provided on the bobbin 30 and the electrode portion formed on the lead wire of the drive coil 10 are connected, the inside of the winding portion 1g of the focusing coil 1 of the drive coil 10 is 12 shows a case where the detachable part 6h of the coil connecting jig 6 shown in FIG. In the description of this embodiment, the description of the same steps as those in the first embodiment will be omitted.

The coil connecting jig 6 is integrally formed by sheet metal working, and the winding portion 1g of the drive coil 10 is formed.
Detachable part 6h that can be attached and detached to the outside of the bobbin 30, and the electrode parts 11b, 12b, 13b, 14 provided on the bobbin 30 from the attachable part 6h when the attachable part 6h is attached to the winding part 1g.
The extension parts 6a, 6b, 6c, 6d, 6e, and 6f which extend so as to oppose b, 15b, and 16b are provided.

In the coil connecting jig 6, the attaching / detaching portion 6h is attached to one side surface 2 of the tracking coils 2 and 3 of the driving coil 10.
It is attached so that it is fitted from the other side surface side facing k, 3k.

In the drive coil 10 to which the attachment / detachment portion 6h of the coil connecting jig 6 is attached, as shown in FIG. 13, the lead wires 1h and 1i of the drive coil 10 have the distal end portions 1c and 1d extended portions 6a and 6b. It is wound and held. Further, the tip ends 2c and 2d of the lead wires 2h and 2i are wound around and held by the extended portions 6c and 6d. Similarly, the tip portions 3c and 3d of the lead wires 3h and 3i are wound around and held by the extended portions 6a and 6b.

The drive coil 10 mounted on the coil connecting jig 6 and wound with the respective lead wires is mounted on the mounting portion 36 from the opening 35 side of the bobbin 30 as shown in FIG.

Lead wires 1h, 1 of this drive coil 10
tip portions 1c, 1d, 2 of i, 2h, 2i, 3h, 3i
c, 2d, 3c, and 3d are the extended portions 6 of the coil connecting jig 6.
Ends 1 of the lead wires 1h, 1i, 2h, 2i, 3h, 3i wound around a, 6b, 6c, 6d, 6e, 6f.
As shown in FIG. 14, the conducting portions formed on the a, 1b, 2a, 2b, 3a, and 3b are positioned on the electrode portions 11b, 12b, 13b, 14b, 15b, and 16b provided on the bobbin 30. And the conductive portion is provided on the electrode portion 11
It is welded to b, 12b, 13b, 14b, 15b, 16b by laser beam irradiation or the like.

Lead wires 1h, 1 of this drive coil 10
end portions 1a, 1b, 2a of i, 2h, 2i, 3h, 3i,
Conductive parts formed on 2b, 3a, 3b and electrode parts 11b, 12b, 13b, 14b, 15 provided on the bobbin 30.
After welding b and 16b, the lead wire 1 extending from the welded portion formed by this welding to the holding portion held by the winding.
The portions near h, 1i, 2h, 2i, 3h, and 3i are cut off.

After cutting the coil of the unnecessary portion of the lead wire, the attachment / detachment portion 6h of the coil connecting jig 6 is connected to the drive coil 10.
The tracking coils 2 and 3 of the bobbin 30 are detached from the one side surface 2k facing the one side surface 2k and the other side surface of the bobbin 30.
The coil connecting jig 6 is removed from the side.

Through the above steps, the lead wires 1h and 1i of the focusing coil 1 are connected to the electrode portions 11b and 12b, the lead wires 2h and 2i of the tracking coil 2 are connected to the electrode portions 13b and 14b, and the tracking coil 3 is formed.
The lead wires 3h, 3i of are connected to the electrode portions 15b, 16b.

Since the above-mentioned connecting portion is formed by welding instead of soldering, the connecting portion is formed in a uniform shape and size. Therefore, the bobbin 30 is arranged in the objective lens driving device with good weight balance.

Therefore, the optical pickup device can accurately write and / or read the information signal.

Further, the lead wires 1h, 1 of the drive coil 10
The tip portions of i, 2h, 2i, 3h, and 3i are held by being wound around the coil connecting jig 6, and then the lead wire and the electrode portion provided on the bobbin are connected by welding or the like. Even if the drive device 60 is downsized or the lead wire is composed of a covered wire having a fine diameter, the connection is easily performed, and it is easy to cope with the automation of the connection.

In this embodiment, the coil connecting jig 4, the coil connecting jig 5, and the coil connecting jig 6 are used as an example of the coil connecting jig. The present invention is applicable to any coil connecting jig in which the electrode portion formed on the lead wire of the drive coil 10 is provided on the electrode portion provided on the bobbin 30 and is detachably attached to the drive coil 10. It is possible.

Further, when the conducting portion formed on each lead wire of the drive coil 10 is provided on the electrode portion of the bobbin 30, after the preliminary soldering with a very small amount of solder is performed, the welding,
Alternatively, the position of the connecting portion can be controlled with high accuracy by connecting the connecting portion by crimping or the like.

[0074]

As described in detail above, according to the coil connecting jig of the present invention, the electrode portion provided on the bobbin and the conducting portion of the drive coil are formed in a uniform shape and size. Easily connected. Therefore, the method for manufacturing the objective lens driving device, in which the information signal is accurately written and / or read and which constitutes the optical pickup device, becomes possible.
Further, it facilitates automation of the manufacturing method.

According to the method of manufacturing the objective lens driving device using the above-mentioned coil connecting jig of the present invention, the electrode portion provided on the bobbin and the conducting portion of the driving coil are formed in a uniform shape and size. The bobbin has a good weight balance. Therefore, it is possible to provide a method of manufacturing an objective lens driving device in which an information signal is accurately written and / or read and which constitutes an optical pickup device.

[Brief description of drawings]

FIG. 1 is a perspective view showing an objective lens driving device according to the present invention, showing a state in which a lead wire of a driving coil is connected to an electrode portion provided on a bobbin.

FIG. 2 is an exploded perspective view showing a bobbin to which a drive coil is attached and a support holder that supports the bobbin.

FIG. 3 is an exploded perspective view showing a bobbin supported by a support holder and a yoke integrally combined with the support holder.

FIG. 4 is a perspective view of a coil connecting jig used in the method of manufacturing the objective lens driving device according to the first embodiment of the present invention.

FIG. 5 is a perspective view of the coil connecting jig mounted on a drive coil of an objective lens driving device, showing a state in which the drive coil is wound around an extension portion of the coil connecting jig.

FIG. 6 is a side view when the coil connecting jig is attached to a drive coil of an objective lens driving device and an extended portion of the coil connecting jig around which the drive coil is wound is extended.

FIG. 7 is a perspective view of an objective lens driving device to which a driving coil having the above-mentioned coil connecting jig is attached.

FIG. 8 is a perspective view of a coil connecting jig used in a method of manufacturing an objective lens driving device according to a second example of the present invention.

FIG. 9 is a perspective view when the coil connecting jig is attached to a drive coil of an objective lens driving device, showing a state in which the drive coil is wound around an extension portion of the coil connecting jig.

FIG. 10 is a perspective view of an objective lens driving device to which a driving coil to which the above-mentioned coil connecting jig is attached is attached.

FIG. 11 is an enlarged plan perspective view showing a main part of an objective lens driving device to which a driving coil having the coil connecting jig is attached.

FIG. 12 is a perspective view of a coil connecting jig used in a method of manufacturing an objective lens driving device according to a third example of the present invention.

FIG. 13 is a perspective view when the coil connecting jig is attached to a drive coil of an objective lens driving device, showing a state in which the drive coil is wound around an extension portion of the coil connecting jig.

FIG. 14 is a perspective view of an objective lens driving device to which a driving coil having the coil connecting jig is attached.

[Explanation of symbols]

1 Focusing coil 1a, 1b Conducting part 1c provided at the end of the drive coil 1c, 1d Tip of the drive coil 1g Winding part of the drive coil 2, 3 Tracking coils 2a, 2b, 3a, 3b Provided at the end of the drive coil Conductive part 2c, 2d, 3c, 3d Drive coil tip part 2g, 3g Drive coil winding part 4, 5, 6 Coil connection jig 4h, 5h, 6h Coil connection jig attachment / detachment part 4a, 4b 4c, 4d, 4e, 4f Extension parts of coil connecting jig 5a, 5b, 5c, 5d, 5e, 5f Extension parts of coil connecting jig 6a, 6b, 6c, 6d, 6e, 6f Coil connecting jig Extending part of tool 10 Drive coil 11b, 12b, 13b, 14b, 15b, 16b Electrode part 21b, 22b, 23b, 24b, 25b, 26b provided on bobbin Provided on bobbin Electrode part 30 bobbin

Claims (2)

[Claims] 1. An attachable / detachable portion that is attachable / detachable to and from a winding portion of a drive coil of an objective lens driving device, and when the attach / detach portion is attached to the drive coil, the detachable portion is attached to a bobbin of the objective lens driving device. A coil connecting jig that extends so as to face the provided electrode portion and that has an extending portion with which the tip portion of the lead wire of the drive coil is interlocked. 2. A jig mounting step of mounting a detachable part of a coil connecting jig on a winding part of a drive coil of an objective lens driving device, and a conducting part formed on a lead wire of the drive coil is the objective lens. A coil holding step of winding and holding the tip end portion of the lead wire around the extended portion of the coil connecting jig so as to be located on the electrode portion provided on the bobbin of the drive device; Connecting step for connecting the electrode part and the conducting part formed on the lead wire of the drive coil, and the coil connecting jig wound and held by the coil holding step from the electrode part of the bobbin connected in the connecting step. Of the lead wire of the drive coil across the extended portion of the tool, and the attaching / detaching step of detaching the coil connecting jig from the winding portion of the drive coil. Production method.