JPH08115527A - Optical pickup actuator - Google Patents

Abstract

PURPOSE: To improve attaching workability of a repeating substrate by positioning the repeating substrate with the external size and a projecting part of the repeating substrate. CONSTITUTION: A lens holder 2 is formed by a resin having elasticity, and a projecting part 202 is formed integrally. A positioning and the fixing to the lens holder 2 are performed with the external sizes of the projecting part 202 and the repeating substrate 10. Viewing the repeating substrate 10 so that a pattern surface becomes the front, the external size of the repeating substrate 10 is controlled by the projecting part 202, and the positioning is performed. In such a manner, the repeating substrate 10 is controlled relating to the left/ right and upper/lower directions of a paper surface. By positioning the repeating substrate 10 without using other member and a jig, etc., in such a manner, the attaching workability of the repeating substrate 10 is facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pickup actuator employed in an optical information recording / reproducing apparatus for optically recording, reproducing or erasing information on an information recording medium.

[0002]

2. Description of the Related Art An optical pickup actuator of a conventional optical information recording / reproducing apparatus has a structure as shown in FIG. In FIG. 1, reference numeral 1 is an objective lens that focuses a light beam on a desired track of a recording medium, and is held by a lens holder 2. Lens holder 2
The objective lens 1 in the focus direction (AF direction in the figure)
The focus coil 3 that is driven in the direction A and the tracking coil 4 that is driven in the direction traversing the track on the recording medium (the AT direction in the drawing) are wound and fixed, respectively.

Reference numeral 5 is a wire for movably supporting the lens holder 2. One end of each of the four wires 5 is passed through a positioning hole 201 provided in the lens holder 2,
The pattern land portion 102 of the relay board 9 which is positioned and fixed to the lens holder 2 is fixed by soldering means, and the other end is fixed to the fixing member 6. The other end is passed through a hole 601 provided in the fixing member 6 to be positioned and fixed to a pattern land portion of the substrate 602 provided on the back surface of the fixing member 6 by means of soldering. .

The wire 5 also serves as a means for energizing each coil. Further, since the material is fixed by solder, the spring 5 and the conductivity are good, and the solder is good, and the phosphor bronze is good. And beryllium copper are suitable. Relay board 1
The other land portion of the 0 pattern has terminals 30 of each coil.
1 is soldered, and the coil is energized through the wire 5.

The fixing member 6 is fixed to the magnetic circuit 7. Reference numeral 8 is a permanent magnet, which is fixed to the magnetic circuit 7. The focus coil 3 and the tracking coil 4 cooperate with this magnetic circuit to drive the objective lens 1.

[0006]

However, in the above-mentioned conventional example, when wiring the ends of the coil, the bent portion of the coil returns due to spring back, and the soldered portion of the coil is displaced from the pattern land portion. Since it floated from the land, soldering was difficult and workability was poor. Further, in the worst case, it is necessary to re-form the bending of the coil end portion, which causes a decrease in productivity. Further, when the actuator is downsized, it becomes difficult to use a jig for bending the coil end, which makes wiring work difficult.

Further, in the wire support type actuator, when the actuator is downsized, the space of the wire positioning portion on the lens holding member side becomes small,
There was a problem that the wire could not be positioned.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a first object thereof is to provide an optical pickup actuator capable of improving soldering workability at the time of wiring processing of coil terminals. Is.

A second object of the present invention is to provide an optical pickup actuator which facilitates positioning of a relay board for electrically connecting coil terminals.

A third object of the present invention is to provide an optical pickup actuator in which a relay board for electrically connecting coil terminals can be easily fixed.

A fourth object of the present invention is to provide an optical pickup actuator in which a wire supporting type actuator can position a wire with a simple structure even if it is downsized.

A fifth object of the present invention is to provide an optical pickup actuator for a wire support type actuator, which is improved in soldering workability at the time of wiring processing of a coil terminal even if it is downsized.

A sixth object of the present invention is to provide an optical pickup actuator in a wire support type actuator, which can easily position a relay board for electrically connecting a coil terminal even if the actuator is downsized. is there.

A seventh object of the present invention is to provide an optical pickup actuator in a wire support type actuator, which can easily fix a relay board for electrically connecting a coil terminal even if it is downsized. is there.

[0015]

In order to achieve the above first object, the present invention provides an optical information recording for optically recording, reproducing or erasing information on the surface of a recording medium. In an optical pickup actuator of a reproducing apparatus, an objective lens that collects light on a recording medium surface, an objective lens holding member that holds the objective lens, and a support member that movably supports the objective lens holding member are fixed. A relay having a mounted magnetic circuit, at least one coil that cooperates with the magnetic circuit to drive the objective lens in at least one direction, and a land for electrically connecting the ends of the coil by soldering. A substrate, the relay substrate is fixed to the holding member, and the holding member has a surface parallel to the coil terminal wiring surface of the relay substrate. And at least a pair of substantially L-shaped protrusions having a vertical surface are formed, and the protrusions are positioned so that the lands are arranged on a line connecting the protrusions. .

In the above-mentioned structure, by hooking the end of the coil to the projecting portion, wiring can be performed on the pattern land portion of the relay substrate without floating from the wiring surface.

In order to achieve the second object, in the present invention, the relay substrate is positioned with respect to the objective lens holding member by the protrusion and the outer shape of the relay substrate.

With the above structure, since the protruding portion also serves as the positioning member, the relay board can be positioned without the need for a new structure.

In order to achieve the third object, in the present invention, the relay board is further elastically sandwiched by the protrusions and fixed to the objective lens holding member.

With the above structure, the relay board can be positioned and fixed without requiring a new structure. Further, when the fixing force is insufficient, this can be temporarily fixed, and then the main fixing can be performed by adhesion.

In order to achieve the fourth object, the present invention provides an optical pickup actuator of an optical information recording / reproducing apparatus for optically recording, reproducing or erasing information on the surface of a recording medium, An objective lens for condensing light on a recording medium surface, an objective lens holding member for holding the objective lens, at least four wires for movably supporting the objective lens holding member, and a magnetic circuit fixedly attached. And at least one coil that cooperates with the magnetic circuit to drive the objective lens in at least one direction,
An intermediate member fixed to the holding member is provided, and one end of the wire on the objective lens holding member side is positioned by a positioning portion provided on the intermediate member.

Therefore, since the positioning portion can be formed on the intermediate member, the space is increased, the degree of freedom of design is increased, and the actuator is more flexible than the positioning portion is formed on the objective lens holding member around which the coil or the like is wound. It can be made smaller.

In order to achieve the fifth object, the present invention further comprises a relay board having a land for electrically connecting the ends of the coil by means of soldering, and the intermediate board. The relay board is fixed to a member, and a plurality of substantially L-shaped protrusions having a surface parallel to the coil terminal wiring surface and a surface perpendicular to the coil terminal wiring surface are formed at a position higher than the terminal wiring surface of the coil. The protrusions are located so that the lands are arranged on a line connecting the protrusions.

With the above structure, even if the actuator is miniaturized, by hooking the end of the coil to the projecting portion, wiring can be performed on the pattern land portion of the relay board and the amount of floating from the wiring can be minimized. Therefore, the coil terminal can be easily soldered.

In order to achieve the sixth object, the present invention further positions the relay board by the projecting portion. With the above configuration, the relay board can be easily positioned even if the actuator is downsized.

In order to achieve the seventh object, in the present invention, the relay board is further held by the projecting portion and fixed to the intermediate member. With the above configuration, the relay board can be easily positioned and fixed even if the actuator is downsized.

[0027]

【Example】

(First Embodiment) FIG. 1 shows a first embodiment according to the present invention. In FIG. 1, reference numeral 1 is an objective lens that focuses a light beam on a desired track of a recording medium, and is held by a lens holder 2. Lens holder 2
The objective lens 1 in the focus direction (AF direction in the figure)
The focus coil 3 that is driven in the direction A and the tracking coil 4 that is driven in the direction traversing the track on the recording medium (the AT direction in the drawing) are wound and fixed, respectively. The tracking coil 4 is formed by continuously winding four coils in series.

Reference numeral 5 is a wire for movably supporting the lens holder 2. The four wires 5 are positioned by passing one end thereof through a positioning hole 201 provided in the lens holder 2 and the relay board 10 It is fixed to the pattern land portion 102 by soldering. The other end is passed through a hole 601 provided in the fixing member 6 to be positioned,
It is fixed to the pattern land portion of the substrate 602 provided on the back surface of the fixing member 6 by soldering. Relay board 1
The end of each coil is soldered to the other pattern land portion 102 of the 0 pattern 101, and the wire 5
The coil is energized via the.
The wire 5 doubles as a means for energizing each coil, and is fixed with solder, so that it has good spring properties and conductivity,
In addition, phosphor bronze and beryllium copper, which have good solderability, are suitable as materials.

The fixing member 6 is fixed to the magnetic circuit 7. Reference numeral 8 is a permanent magnet, which is fixed to the magnetic circuit 7. The focus coil 3 and the tracking coil 4 cooperate with this magnetic circuit to drive the objective lens 1.

Next, the essential points according to the present invention of this embodiment will be described with reference to the enlarged perspective view of the essential points in FIG. The relay board 10 is used for the lens holder 2 by the following procedure and method.
It is fixed to. That is, the lens holder 2 is formed of a resin having elasticity, and the protrusion 202 is integrally formed. The protrusion 202 and the outer shape of the relay board 10 position and fix the lens holder 2.

In FIG. 3, the relay substrate 10 is formed on the pattern surface 100.
Is a view seen from the front, but as shown in the figure, the outer shape of the relay board 10 is regulated by the projecting portion 202 to perform positioning. In this embodiment, the relay board 10 is restricted by the protrusions in the left-right and up-down directions of the paper surface, but any one of them may be restricted. Further, the positioning may be performed by abutting from one direction instead of the both sides.

FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3, which shows the projecting portion 202 when viewed from the lateral direction parallel to the pattern surface 100 of the relay substrate 10. As shown, the protrusion has an undercut portion 20.
3 are formed. To fix the relay board 10 to the lens holder 2, as shown in FIG. 5, the relay board 10 is pushed by a finger to spread the protruding portion 202, and the relay board 10 is pushed into the undercut portion 203. ,
The elasticity of the protrusion 202 restores the protrusion 202. As a result, the relay board 10 is held and fixed to the lens holder 2.

As described above, the relay board 10 has the protruding portion 20.
Positioning and fixing are performed by 2. In addition, when the holding force of the relay substrate 10 by only the protruding portion 202 is weak, the holding by the protruding portion 202 is used as temporary fixing until the adhesive for main fixing is cured, and the main fixing is performed by the adhesive. You can also

The terminal of each coil is bent in the middle and guided to the pattern land portion 102 of the relay board 10. FIG. 6 shows the actuator viewed from above, and FIG. 7 shows the wiring of the coil terminal. As shown in FIG. 5, the wiring can be bent by hooking it on the protrusion 202 having the surface 204 perpendicular to the pattern surface 100 and the surface 205 parallel to the pattern surface 100. And another protrusion 20
Hook on 2.

In this state, the pattern land 102 formed at the center of the protruding portion 202 is soldered. At this time, the surface 205 parallel to the pattern surface 100 is formed on the protrusion 2
Since it is formed in No. 02, the coil terminals 301 and 401 do not rise significantly from the pattern surface 100, and soldering can be easily performed. After soldering, remove the extra coil ends 301 and 401 from the protrusion 202,
By pulling upwards, stress concentration occurs at the soldered portion, and it can be folded.

As described above, in this embodiment, the protrusion 202
An undercut portion 203 is provided on the relay substrate 1 where
Since 0 is held and fixed, the relay substrate 10 can be easily positioned and fixed without using any other member or jig. Further, since the projecting portion 202 and the pattern 102 are configured such that the pattern land portion 102 is located on the line connected by the pair of projecting portions 202, the coil end is guided to the pattern land portion 102 without using a jig or the like. be able to. Further, since the surface 205 parallel to the pattern surface 100 is formed on the projecting portion 202, the coil terminals 301 and 401 can be prevented from being lifted from the pattern surface 100 to a minimum, so that the workability of soldering is improved. improves.

As described above, in this embodiment, since the protrusion is formed on the lens holder, the relay substrate can be positioned, the relay member can be held, and the coil terminal can be guided. In the work relating to (1), the assembly can be performed without using any other auxiliary member such as a jig. Also, the soldering of the coil terminal can be performed reliably. Therefore, there is an excellent effect in production that the assembling efficiency relating to the coil end processing of the actuator is improved. (Second Embodiment) FIG. 8 shows a second embodiment according to the present invention. In this embodiment, the same names and configurations as those in the first embodiment are given the same numbers and their explanations are omitted. Further, FIG. 9 shows an enlarged main part of this embodiment.

In this embodiment, the intermediate member 9 is fixed to the lens holder 2 and the positioning hole 901 provided in the intermediate member 9 is provided.
Then, the wire 5 is positioned. For this reason, when the actuator is downsized, the space for providing the wire positioning portion in the lens holder 2 is eliminated, but as shown here, by providing the positioning portion in the intermediate member 9,
A small actuator can also position and support the wire.

The positioning of the intermediate member 9 on the lens holder 2 is performed, for example, by a boss provided on the lens holder 2 and the intermediate member 9.
It is only necessary to use the holes provided in the above, and the positioning of the intermediate member 9 can be easily performed even if the lens holder 2 is downsized. In this embodiment, the intermediate member 9 is adhered to the lens holder 2.

Further, in this embodiment, the relay board 10 is fixed to the intermediate member 9, but the positioning and fixing method thereof is the same as in the first embodiment, the protruding portion 9 provided on the intermediate member 9.
02. FIG. 10 shows the relay board 10.
FIG. 7 is a view of the pattern surface 100 as viewed from the front, but as shown in the drawing, the outer shape of the relay substrate 10 is regulated by the protruding portion 902 for positioning.

FIG. 11 is a cross-sectional view taken along the line BB of FIG. 10, showing a state in which the protruding portion 902 is viewed from above in parallel with the pattern surface 100 of the relay substrate 10. As shown in the figure, also in this embodiment, an undercut portion 903 is formed on the protruding portion 902. Since the intermediate member 9 is formed of a resin having elasticity, the intermediate substrate 9 is fixed to the intermediate member 9 by pushing the intermediate substrate 10 with a finger to spread the protruding portion 902, and the undercut portion. The relay board 10 is pushed into 903, and then the protrusion 9
02 is restored by its elasticity. As a result, the intermediate member 9 is held and fixed.

The terminal of each coil is bent in the middle and guided to the pattern land portion 102 of the relay board 10. As shown in FIG. 12 in which the relay board is viewed in parallel and in FIG. Then, the projection 902 having the surface 904 perpendicular to the pattern surface 100 and the surface 905 parallel to the pattern surface 100 is hooked to perform bending. Then, it is hooked on the other protruding portion 902. In this state, the pattern lands 102 formed in the centers of the protrusions 202 are soldered. At this time, the pattern surface 100
Since the surface 905 parallel to the above is formed on the protrusion 902,
The coil terminals 301 and 401 do not rise significantly from the pattern surface 100, and soldering can be performed easily.
After soldering, the extra coil ends 301 and 401 are removed from the projecting portion 902 and pulled upward, so that stress concentration occurs at the soldering portion and the folding is performed.

As described above, in this embodiment, even when the positioning hole for the wire 5 cannot be formed in the lens holder 2 when the actuator is downsized, the intermediate member 9 is used to form the positioning hole 901 for the wire 5. By providing the intermediate member 9, the positioning hole can be easily formed. Further, since the undercut portion 903 is provided on the projecting portion 902 provided on the intermediate member 9 and the relay board 10 is held and fixed there, another member or jig is used for positioning and fixing the relay board 10. It can be done easily without.

Further, the projecting portions 902 are arranged so that the pattern land portions 102 are located on the line connected by the pair of projecting portions 902.
And the pattern 102 are configured, the coil end can be guided to the pattern land portion 102 without using a jig or the like. Further, since the surface 905 parallel to the pattern surface 100 is formed on the projecting portion 902, it is possible to minimize the lifting of the coil terminals 301 and 401 from the pattern surface 100. Therefore, the workability of wiring and soldering at the ends of the coil is improved.

As described above, in this embodiment, by using the intermediate member and forming the protrusion on the intermediate member, the wire can be positioned and the relay board of the relay board can be positioned even if the lens holder is downsized. Since the positioning and holding and the guidance of the wiring of the coil terminal can be performed, the assembly can be performed in the work related to the coil terminal processing of the actuator without using any other auxiliary member such as a jig. Also, the soldering of the coil terminal can be performed reliably. Therefore, in addition to the excellent production effect of improving the assembly efficiency of the coil end processing of the actuator, it is possible to further reduce the size of the wire support actuator.

[0046]

As described above, according to the present invention,
Wiring at the end of the coil can be done manually without using jigs, and soldering can be done reliably. Therefore, there is an effect that the efficiency of the wiring of the coil terminal and the soldering work can be improved.

Further, according to the present invention, in addition to the effects of the above-mentioned invention, since the relay board is positioned by the outer shape of the relay board and the protruding portion, the relay board is positioned by using other members or jigs. Since it can be carried out without any need, there is an effect that the workability of attaching the relay board is improved.

Further, according to the present invention, in addition to the effect of the present invention, since the relay board is held by the protruding portion, the positioning and fixing of the relay board can be performed easily without using other members or jigs. Therefore, the workability of attaching and fixing the relay board is improved.

Further, according to the present invention, since the intermediate member for positioning the wire on the movable portion side is provided, the wire can be positioned and fixed even if there is no space in the lens holder, and the actuator can be miniaturized. There is an effect that can be.

Further, according to the present invention, in addition to the effects of the above-mentioned invention, since the intermediate member for positioning the wire is provided with the protrusion for wiring processing, wiring and soldering of the terminal of the coil can be performed even with a small actuator. This has the effect of improving work efficiency.

Further, according to the present invention, in addition to the effects of the above-mentioned invention, since the relay board is positioned by the projection of the intermediate member and the outer shape of the relay board, the positioning of the relay board is performed by another member or jig. Since it can be performed without using, there is an effect that mounting workability of the relay board is improved even if the actuator is downsized.

Further, according to the present invention, in addition to the effect of the present invention, since the relay board is held by the protruding portion of the intermediate member, the relay board can be positioned and fixed without using any other member or jig. Since it can be easily performed, the workability of attaching and fixing the relay board is improved even if the actuator is downsized.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment.

FIG. 2 is an enlarged perspective view of a main part of FIG.

3 is a front view of the relay board of FIG. 1. FIG.

FIG. 4 is a partial cross-sectional view of a protruding portion indicated by AA in FIG.

5 is a partial cross-sectional view showing how the relay board of FIG. 1 is fixed.

6 is a view of the actuator of FIG. 1 viewed from above.

FIG. 7 is a perspective view showing how the ends of the coil of FIG. 1 are wired.

FIG. 8 is a perspective view of a second embodiment.

9 is an enlarged perspective view of a main part of FIG.

10 is a front view of the relay board of FIG.

FIG. 11 is a partial cross-sectional view of the protrusion shown in BB of FIG.

12 is a side view of the actuator of FIG.

FIG. 13 is a perspective view showing how the terminals of the coil of FIG. 8 are wired.

FIG. 14 is a perspective view showing a conventional example.

[Explanation of symbols]

 1 Objective Lens 2 Lens Holder 3 Focus Coil 4 Tracking Coil 5 Wire 6 Fixing Member 7 Yoke 8 Magnet 10 Relay Board 100 Pattern Surface 101 Pattern 102 Pattern Land 9 Intermediate Member 201,901 Positioning Hole 202,902 Projection 203,204 Under Cut part 204,904 Portion perpendicular to the pattern surface of the relay substrate 205,905 Portion parallel to the pattern surface of the relay substrate 301 Focus coil coil terminal 401 Tracking coil coil terminal

Claims (7)

[Claims] 1. An optical pickup actuator of an optical information recording / reproducing apparatus for optically recording, reproducing or erasing information on the surface of a recording medium, and an objective lens for condensing light on the surface of the recording medium. An objective lens holding member for holding the objective lens, a support member for movably supporting the objective lens holding member, a magnetic circuit fixedly attached, and an objective lens in at least one direction in cooperation with the magnetic circuit. At least one coil to be driven to, and a relay board having a land for electrically connecting the ends of the coil by soldering, the relay board being fixed to the holding member, and The holding member is provided with at least a pair of substantially L-shaped protrusions having a surface parallel to the coil terminal wiring surface and a surface perpendicular to the coil terminal wiring surface of the relay board. The optical pickup actuator, wherein the protrusions are positioned so that the lands are arranged on a line connecting the protrusions. 2. The optical pickup actuator according to claim 1, wherein the relay substrate is positioned with respect to the objective lens holding member by the protrusion and the outer shape of the relay substrate. 3. The objective lens holding member is formed of a resin having elasticity, and the relay substrate is held by the projecting portion and fixed to the objective lens holding member. The optical pickup actuator described. 4. An objective lens for condensing light on a recording medium surface in an optical pickup actuator of an optical information recording / reproducing apparatus for optically recording, reproducing or erasing information on the recording medium surface, An objective lens holding member for holding the objective lens, at least four wires for movably supporting the objective lens holding member, a magnetic circuit fixedly attached, and an objective lens in cooperation with the magnetic circuit. At least one coil that drives in at least one direction, and an intermediate member that is fixed to the holding member, and a positioning portion provided on the intermediate member allows one end of the wire on the objective lens holding member side An optical pickup actuator characterized by performing positioning. 5. A relay board having a land for electrically connecting the ends of the coil by soldering, the relay board fixed to the intermediate member, and parallel to the terminal wiring surface of the coil. Forming at least a pair of substantially L-shaped protrusions having a surface and a vertical surface, and arranging the protrusions so that the land is arranged on a line connecting the protrusions. The optical pickup actuator according to claim 4. 6. The optical pickup actuator according to claim 5, wherein the relay board is positioned by the protrusion. 7. The intermediate member is formed of a resin having elasticity, and the relay board is held by the protruding portion and fixed to the intermediate member.
The optical pickup actuator according to item 1.