JPH11265516A - Optical pickup - Google Patents

Abstract

(57) Abstract: Provided is an optical pickup capable of reducing the number of components without using a wire holding portion, facilitating the injection of a damping agent into a wire fixing support portion, and preventing a variation in the injection. An opening including tapered portions (13, 14, 18) and grooves (16, 17, 19) is formed in a portion of a lens holder (2), a wire fixing support (6), and a wire fixing support substrate (8) where a wire is attached. The wire positioned at the root is fixed to the wire fixing support substrate and the wire fixing portion 1 of the lens holder.
1 and a liquid reservoir 15 having a size of a movable range of a wire for injecting a damping agent into a wire inserted into the groove adjacent to the groove of the wire fixing support portion while being fixed to the wire fixing support portion. Is designed to inject a damping agent into the inserted liquid pool.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pickup for an optical information recording / reproducing apparatus for recording and reproducing information optically by condensing and irradiating a light beam onto an optical recording medium via an objective lens. The present invention relates to an optical pickup characterized by a structure of a mounting portion of a suspension wire for supporting a lens holder.

[0002]

2. Description of the Related Art Conventionally, as an optical pickup of this type, for example, Japanese Patent Publication No. 7-210883 and Japanese Utility Model Publication No.
No. 116917 is known, as shown in FIG. FIG. 4 is a perspective view schematically showing a configuration of a conventional optical pickup. FIG. 4A is a perspective view of the optical pickup.
(B) is an enlarged view of a portion A of a portion A shown by a dotted line in FIG. 1.

First, the configuration of a conventional optical pickup will be described with reference to FIG. 4, reference numeral 31 denotes an objective lens, 32 denotes a lens holder on which the objective lens 31 is mounted, 33 denotes a focus direction driving coil mounted on the lens holder 32, and 34 denotes a tracking direction driving coil mounted on the lens holder 32. , 35 are four suspension wires for supporting the lens holder 32, and 36 is a wire fixing supporting portion for fixing and supporting one end of the wire 35, and has a V-shaped groove.

Reference numeral 37 denotes a yoke to which a magnet 42 is attached to form a magnetic circuit; 43, a wire pressing portion for sandwiching and fixing the suspension wire 35 between a V-shaped groove of a wire fixing support portion 36; and 53, a lens holder. A wire pressing portion 42 for sandwiching and fixing the suspension wire 35 between the V-shaped groove of the wire mounting portion 32 and a magnet 42 acting on the focus direction driving coil 33 and the tracking direction driving coil 34.

Next, the operation of the conventional optical pickup will be described with reference to FIG. First, the suspension wire 35 is inserted into the V-shaped groove of the lens holder 32 and the wire fixing support 36. Next, the wire pressing portion 43 is attached to the lens holder 32 so as to sandwich the suspension wire 35, and the wire pressing portion 53 is attached to the wire fixing support portion. Thus, each V
The lens holder 32 can be supported and fixed to the wire fixing and supporting portion 36 via the suspension wire 35 by sandwiching the suspension wire 35 between the groove and the wire pressing portions 43 and 53.

[0006]

However, in the above-described conventional optical pickup, the elasticity of the wire pressing portion is used to suppress resonance due to the spring property of the wire. Therefore, in addition to the large number of components, it is necessary to adhesively fix the wire holding portion to the wire fixing support portion 36 and the lens holder 32. In addition, when a gel damping agent is used as the elastic body for the wire holding portion, it is difficult to inject the damping agent into the back side of the wire holding portion, since the damping agent must be injected.
A part for storing the damping agent cannot be secured.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. By soldering and fixing a wire, the number of components can be reduced without using a wire holding portion, and the wire can be fixed and supported. It is an object of the present invention to provide an optical pickup capable of facilitating injection of a damping agent into a portion and preventing variation in injection of the damping agent.

Further, the present invention reduces the number of parts by not using a wire-fixing support substrate by solder-plating the back surface of the wire-fixing support portion and soldering and fixing the wire thereto. It is an object of the present invention to provide an optical pickup that can perform the optical pickup.

[0009]

Therefore, an optical pickup according to the present invention has an opening formed of a tapered portion and a groove at a portion where a wire of a lens holder, a wire fixing support portion and a wire fixing support substrate is attached, and the opening is formed. Insert the wire from the tapered part into the groove of the opening, position the wire at the root of the groove, and solder the wire positioned at the root of the groove to the wire fixing support board and the wire fixing part of the lens holder and fix it It is something to do.

The present invention provides an optical pickup in which the wires are soldered to the wire fixing support substrate and the wire fixing portion of the lens holder, thereby eliminating the need for a wire holding portion and reducing the number of components. Can be

The optical pickup according to the present invention comprises:
A liquid reservoir having a size corresponding to a wire movable range for injecting a damping agent into a wire inserted into the groove adjacent to the groove of the wire fixing support portion is formed, and a wire movable range of a wire movable range for the wire into which the wire is inserted is formed. The size is such that a damping agent is injected.

According to the present invention, unlike the optical pickup, there is no need to extract the wire into the back side of the wire holding portion, and the damping agent is directly injected from the opening side into the wire inserted into the liquid pool of the wire fixing support portion. By doing so, it is possible to easily inject an amount corresponding to the movable range of the wire, so that the injection variation of the damping agent is reduced and the effect of damping is improved, so that the injection amount may be small, and the damping agent may be small. And an optical pickup that can also suppress variations in vibration characteristics.

The optical pickup according to the present invention comprises:
A solder plating portion for fixing the wire is provided on the back surface of the wire fixing support portion, and one end of the wire is soldered to the solder plating portion and fixed.

According to the present invention, since the wire fixing support substrate is not used for fixing the wires, an optical pickup which can reduce the number of parts can be obtained.

[0015]

According to the first aspect of the present invention, there is provided a lens holder, a wire fixing support portion, and an opening portion including a taper portion and a groove portion at a portion where a wire of a wire fixing support substrate is attached, The wire is inserted into the groove, the wire is positioned at the root of the groove, and the wire positioned at the root of the groove is fixed by soldering to the wire fixing support substrate and the wire fixing part of the lens holder. By fixing the wire supporting the lens holder to the lens holder and the wire fixing support board by soldering, the number of parts can be reduced by not using a wire holding part as in the related art. This has the effect of reducing costs.

According to a second aspect of the present invention, there is provided a liquid reservoir having a size of a movable range of a wire for injecting a damping agent into a wire inserted into the groove adjacent to the groove of the wire fixing support. The damping agent is formed so as to inject the damping agent into the liquid pool into which the wire is inserted, with the size of the wire movable range, and the damping agent is applied to the wire inserted into the liquid pool of the wire fixing support portion. On the other hand, direct injection from the opening side allows easy injection by an amount corresponding to the movable range of the wire, so that the dispersion of the injection of the damping agent is reduced, uniformized, and the effect of damping is reduced. Has the effect of reducing the amount of injection, reducing the amount of damping agent, and suppressing variations in vibration characteristics.

According to a third aspect of the present invention, a solder plating portion for fixing a wire is provided on the back surface of the wire fixing support portion, and one end of the wire is fixed by soldering to the solder plating portion. By fixing the wire by soldering to the solder plating part of the wire fixing support part, there is no need to use a wire fixing support substrate,
This has the effect that the number of parts can be further reduced.

According to a fourth aspect of the present invention, there is provided the optical pickup according to the first, second or third aspect, wherein the number of parts is reduced, the cost is reduced, and the number of wires is reduced. Since the injection can be easily performed by an amount corresponding to the movable range, the dispersion of the injection of the damping agent is reduced, and the effect of the damping is also improved. Therefore, the injection amount may be small, and the dispersion of the vibration characteristics may be suppressed. This has the function of obtaining a formula information recording / reproducing device.

Hereinafter, based on the attached drawings and FIGS. 1 to 3,
An embodiment of the present invention will be described in detail. (First Embodiment) First, referring to FIG. 1 and FIG.
An optical pickup according to the first embodiment of the present invention will be described. FIG. 1 is an exploded perspective view showing a configuration of an optical pickup according to a first embodiment of the present invention, and FIG.
FIG. 4 is an enlarged perspective view showing a wire fixing portion of the lens holder shown in FIG.

The configuration of the optical pickup according to the present embodiment will now be described with reference to FIGS. FIG.
2, reference numeral 1 denotes an objective lens, and 2 denotes an objective lens 1.
The lens holder 5 is provided with the lens holder 2 with respect to the wire fixed support substrate 8 in the vertical direction (direction to the optical disk) and the horizontal direction (parallel to the track of the optical disk).
A suspension wire (hereinafter, simply referred to as a wire) that movably supports the wire, a wire fixing support portion 6 that supports a wire fixing support substrate 8 that supports the other end of the wire, and fixes and supports the wire; It is a wire fixed support substrate for fixedly supporting.

Reference numeral 9 denotes a damping agent drawn into the liquid reservoir 15 of the wire fixing support 6, 10 an assembly base of the optical pickup, 11 a wire fixing portion for fixing one end of the wire 5 to the lens holder 2, 13. Is a taper portion of the lens holder 2, 14 is a taper portion of the wire fixing support portion 6, 18 is a taper portion of the wire fixing support substrate 8, 15 is a liquid pool of the wire fixing support portion 6 for extracting a damping agent, and 16 is a lens. The groove of the holder 2, the groove 17 of the wire fixing support 6,
Reference numeral 19 denotes a groove of the wire fixing support substrate 8. The openings of the lens holder 2, the wire fixing support portion 6, and the wire fixing support substrate 8 are defined by the tapered portions 13, 14, 18 and the groove portions 16, 17, 19, respectively.

Next, the assembly of the optical pickup according to the present embodiment will be described with reference to FIGS.
First, as shown in FIGS. 1 and 2, as a wire attachment portion of an optical pickup, a wire fixing portion 11 for attaching and fixing four wires 5 supporting a lens holder 2 on which an objective lens 1 is mounted; The wire fixing support portion 6 for supporting the other end of the wire 5 and the wire fixing support substrate 8 for soldering and fixing the wire 5 are opened to form grooves 16, respectively.
17 and 19 are formed, and the respective grooves 16, 17, and 19 are formed into a tapered shape, and the tapered portion 1 of the lens holder 2 is formed.
3, the taper portion 14 of the wire fixing support portion 6 and the taper portion 18 of the wire fixing support substrate 8,
A liquid reservoir 15 of the damping agent 9 having a size within the movable range of the wire is formed in the wire insertion portion.

The lens holder 2, the wire fixing support 6, and the wire fixing support substrate 8, which are the respective wire attaching portions configured as described above, are set on the assembly base 10. Next, the wires 5 are tapered from the respective openings of the lens holder 2, the wire fixing support 6, and the wire fixing support 8 to the tapered portions 13, 14, 1
Along 8, insert to the root of each groove 16, 17, 19. The inserted wire 5 is positioned at the root of each of the grooves 16, 17 and 19, and in this state, one end of the wire 5 is soldered to the wire fixing portion 11 of the lens holder 2, and the other end of the wire 5 The part is fixed to the wire fixing support substrate 8 by soldering. Finally, the damping agent 9 is injected into the liquid reservoir 15 of the wire fixing support 6 from the opening side, and the wire 5 is supported by the damping agent 9, whereby the resonance of the wire can be attenuated.

According to the optical pickup of the present embodiment, since the lens is fixed to the lens holder 2 and the wire fixing support substrate 8 by soldering, a wire holding portion used in a conventional optical pickup is used. There is no need to pinch the wire 5 and the number of components can be reduced by not using the wire holding portion.

Further, according to the optical pickup of the present embodiment, the damping agent 9 is injected into the liquid pool 15 of the wire fixing support 6 from the opening side to the wire 5, so that the above-described conventional optical pickup is used. Unlike a pickup, there is no need to extract into the back side of the wire holding portion, so that the damping agent 9 can be easily injected by the amount of the movable range of the wire.

Further, according to the optical pickup of the present embodiment, the damping agent 9 can be injected into each of the four wires 5 by the amount of the movable range of the wires. Is reduced and uniformized, and the effect of damping is also improved. Therefore, it is possible to perform damping with a small injection amount, and it is possible to reduce the amount of the damping agent. At the same time, variations in vibration characteristics can be suppressed.

FIG. 2 is an enlarged perspective view showing a wire fixing portion of the lens holder 2 in an enlarged manner. Here, attachment of the wire 5 to the lens holder 2 will be described. First, the wire 5 is connected to the tapered portion 1 of the opening of the lens holder 2.
3 and the wire 5 is positioned at the root of the groove 16 and fixed by soldering. For other points,
Since it has already been described above, the description will not be repeated.

As can be seen from the above description, the assembly of the optical pickup of the present embodiment is much simpler than that of the conventional optical pickup. Note that the opening of the lens holder 2, the wire fixing support 6 and the wire fixing support substrate 8 has the same effect regardless of whether it is provided in the vertical direction or the horizontal direction.

(Second Embodiment) Next, a configuration of an optical pickup according to a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is an enlarged perspective view showing the configuration of a wire fixing support used for the optical pickup according to the second embodiment of the present invention.

In FIG. 3, a wire 5, a wire fixing support 6 and a groove 1 formed by opening the wire fixing support 6 are shown.
7. The taper portion 14 and the liquid pool 15 in which the groove portion 17 is formed in a tapered shape have already been described with reference to FIG. In FIG. 3, reference numeral 21 denotes a solder plating part for directly soldering the wire 5 to the wire fixing support part 6.

Next, the assembly of the wire fixing support 6 of the optical pickup according to the present embodiment will be described with reference to FIG. First, the wire 5 is inserted from the opening of the wire fixing support 6 along the tapered portion 14, positioned at the root of the groove 17, and soldered to the solder plating portion 21 provided on the back surface of the wire fixing support 6. Then, the wire 5 is fixed.

As described above, in this embodiment, the solder plating portion is provided on the back surface of the wire fixing support portion 6,
The wires 5 can be directly soldered and fixed to the wire fixing and supporting portions 6, and the number of components can be reduced because the wire fixing and supporting substrate 8 does not need to be used. still,
The optical pickup according to the present invention can be mounted on any optical information recording / reproducing device such as an optical disk device.

[0033]

The optical pickup according to the present invention is constructed as described above. In particular, a wire for supporting the lens holder is fixed by soldering to the lens holder and the wire fixing support substrate. By not using such a wire holding portion, the number of components can be reduced and cost can be reduced.

The optical pickup according to the present invention does not need to be inserted into the back side of the wire holding portion unlike the above-mentioned conventional optical pickup, especially when the damping agent is extracted.
Since the damping agent is directly injected from the opening side of the wire inserted into the liquid pool of the wire fixing support portion, it can be easily injected by an amount corresponding to the movable range of the wire, The dispersion of the injection of the damping agent is reduced and uniformized, and the effect of the damping is also improved, so that the injection amount may be small, the amount of the damping agent can be reduced, and the fluctuation of the vibration characteristics can be suppressed.

In the optical pickup according to the present invention, it is necessary to use a wire fixing and supporting substrate, particularly, by providing a solder plating portion on the back surface of the wire fixing and supporting portion and soldering and fixing the wire to the solder plating portion. Therefore, the number of parts can be further reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration of an optical pickup according to a first embodiment of the present invention;

FIG. 2 is an enlarged perspective view showing a wire fixing portion of the lens holder shown in FIG. 1 in an enlarged manner.

FIG. 3 is an enlarged perspective view showing a configuration of a wire fixing support used for an optical pickup according to a second embodiment of the present invention;

4A and 4B are perspective views schematically showing a configuration of a conventional optical pickup, wherein FIG. 4A is a perspective view of the optical pickup, and FIG. 4B is an enlarged view of a portion A of a portion A shown by a dotted line in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Objective lens 2 Lens holder 5 Wire (suspension wire) 6 Wire fixing support part 8 Wire fixing support board 9 Damping agent 10 Assembly base 11 Wire fixing part 13, 14, 18 Tapered part 16, 17, 19 Groove part 15 Liquid pool 31 Objective lens 32 Lens holder 33 Focusing direction driving coil 34 Tracking direction driving coil 35 Suspension wire 36 Wire fixing support 37 Yoke 42 Magnet 43 Wire pressing unit 53 Wire pressing unit

Claims (4)

[Claims] An opening comprising a tapered portion and a groove is formed in a portion of a lens holder, a wire fixing support portion, and a wire fixing support substrate to which a wire is to be attached, and the wire is inserted into the groove to form a wire at the root of the groove. An optical pickup characterized in that a wire positioned and positioned at the root of the groove is soldered and fixed to the wire fixing support substrate and the wire fixing portion of the lens holder. Is possible. 2. A liquid reservoir having a size corresponding to a movable range of a wire for injecting a damping agent into a wire inserted into the groove adjacent to the groove of the wire fixing support, and the liquid having the wire inserted therein is formed. 2. The optical pickup according to claim 1, wherein a damping agent is injected into the pool with a size of the movable range of the wire. 3. A solder plating portion for fixing a wire on a back surface of the wire fixing support portion, and one end of the wire is soldered to the solder plating portion and fixed. 2. The optical pickup according to item 2. 4. An optical information recording / reproducing apparatus equipped with the optical pickup according to claim 1, 2 or 3.