JPH0430566Y2 - - Google Patents

Description

[Detailed description of the invention] <Field of industrial application> The present invention relates to an improvement of an optical component adjustment device for adjusting the mounting angle, position, etc. of optical components such as mirrors used in optical information recording and reproducing devices. It is something.

<Summary of the invention> The present invention forms a pedestal for adjusting optical components by fitting a mounting angle adjustment member having an optical component mounting portion that can adjust the angle in the horizontal direction into a cylindrical mounting position adjustment member. , the pedestal is fitted and held in the holding cylinder part of the holder so that the position can be adjusted in the axial direction, and the above-mentioned adjustment of the axial position of the pedestal is achieved without increasing the size of the optical component adjustment device itself in the axial direction. An object of the present invention is to provide an optical component adjusting device in which tilting of an optical component adjusting pedestal in directions other than the axial direction is suppressed as much as possible and stable adjustment can be performed.

<Prior Art> Conventionally, an adjustment device for an optical component such as a mirror used in an optical pickup device or the like in an optical information recording/reproducing device has been constructed as shown in FIGS. 3 and 4.

That is, an optical component (for example, a mirror, etc.) 1 is attached to a connecting portion 2 to a main body portion 2A of a cylindrical optical component adjustment pedestal 2.
The optical component adjustment pedestal 2 is fixed on a disc-shaped optical component mounting portion 2C that is integrally formed via a holder 3 that is formed on a main body of the optical pickup device. It was press-fitted into the holding cylinder portion 3A.

The main body part 2A has four screw holes a, ... which are screwed through the main body part 2A in the axial direction, and the adjustment screws are screwed into each of the screw holes a, .... The horizontal mounting angle of the optical component 1 can be adjusted by appropriately bringing the tips of the screws 4, ... into contact with the back side of the optical component mounting section 2C and pressing the mounting section 2C from the back surface. It was designed to be adjustable.

In addition, an adjustment member (not shown) is inserted from the outside of the holding cylinder part 3A into an adjustment through hole 3B bored in the outer circumferential side of the holding cylinder part 3A.
By engaging with a groove 2A' formed on the outer circumferential side surface of the optical component 1 and moving the main body 2A in the axial direction, the axial mounting position of the optical component 1 can be adjusted.

<Problems to be Solved by the Invention> By the way, when adjusting the optical component adjustment pedestal 2 in the axial direction within the holding cylinder part 3A, the inner peripheral side surface of the main body part 2A and the holding cylinder part 3A is There is a possibility that the main body portion 2A may be tilted in a direction other than the axial direction (for example, in the horizontal direction) due to the gap therebetween.

This inclination can be reduced as the length of the joint between the outer peripheral side surface of the main body portion 2A and the inner peripheral side surface of the holding cylinder portion 3A is longer, and stable adjustment is possible.

However, in the conventional adjustment device as described above, spaces b and c must be provided to enable horizontal angle adjustment of the optical component mounting portion 2C within the limited axial dimension of the holding cylinder portion 3A. Not necessarily,
There is a limit to increasing the length of the joint while ensuring the spaces b and c.

Furthermore, it is also possible to extend both the holding cylinder part 3A and the main body part 2A in the axial direction to increase the length of the joint part, but in this case, the optical component adjustment device itself cannot be moved in the axial direction (vertical direction). This has the problem of increasing the size and hindering efforts to make optical information recording and reproducing devices thinner.

<Means for Solving the Problems> In order to solve the above-mentioned problems, the present invention includes a cylindrical main body part, and a cylindrical body part having a smaller diameter than the main body part and integrally formed with the above-mentioned main body part via a connecting part. A mounting angle adjustment member consisting of a plate-shaped optical component mounting portion whose angle can be adjusted horizontally with respect to the main body is fitted into a cylindrical mounting position adjustment member that is longer than at least the length of the main body in the axial direction. A pedestal for adjusting an optical component is formed by attaching the pedestal to the holder, and the pedestal for adjusting an optical component is fitted and held in the holding cylinder part of the holder so that its position can be adjusted in the axial direction.

<Function> Therefore, since the mounting angle adjusting member is held inside the mounting position adjusting member whose axial length is at least longer than the axial length of the main body of the angle adjusting member, The length of the joint between the circumferential side and the outer circumferential side of the mounting position adjustment member can be maximized, and tilting in directions other than the axial direction that occurs when adjusting the axial position of the optical component adjustment pedestal is minimized. can.

<Example> Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 is a sectional view showing an embodiment of an optical component adjusting device according to the present invention, and FIG. 2 is an exploded perspective view of the same device.

In these figures, 11 is a pedestal for adjusting optical components, and the pedestal 11 is used to hold a mirror 1 as an optical component.
a mounting angle adjustment member 11A that adjusts the horizontal mounting angle of the mirror 12; and a cylindrical mounting position adjustment member that adjusts the axial mounting position of the mirror 12 by press-fitting and holding the adjustment member 11A inside. Member 11B
It consists of.

The mounting angle adjusting member 11A includes a cylindrical main body _11A1 , a disc-shaped optical component mounting part 11A2 having a diameter smaller than the diameter of the main body _11A1 and fixing the mirror ₁₂ to the upper surface thereof, and the above-mentioned Main body part 11
Connecting part 1 that connects A ₁ and the above component mounting part 11A ₂
1A ₃ , and is formed by integral molding.

The mounting angle adjusting member 11A is screwed into the main body part _11A1 through four screw holes a', . The tips of the four screws 13,..., which are conventionally screwed into these screw holes a',..., are brought into contact with the back surface of the component mounting portion _11A2 , as appropriate.
By pressing the mounting portion 11A ₂ from the back side, the horizontal mounting angle of the mirror 12 fixed to the upper surface of the component mounting portion 11A ₂ can be adjusted.

The mounting angle adjusting member 11A is fixed inside the mounting position adjusting member 11B by press-fitting or adhesive.

On the other hand, the mounting position adjusting member 11B has approximately the same length in the axial direction as the mounting angle adjusting member 11A, and can accommodate almost the entire mounting angle adjusting member 11A inside. and
A space g is formed between the outer circumferential side surface of the component mounting portion 11A ₂ and the inner circumferential surface of the mounting angle adjustment member 11B, in which the angle of the component mounting portion 11A ₂ can be adjusted in the horizontal direction. ing.

The axial length of the mounting position adjusting member 11B is at least longer than the length of the main body _11A1 , and is therefore limited to the present embodiment shown in FIG. isn't it.

Furthermore, a groove 11B' for position adjustment is carved on the outer peripheral side surface of the mounting position adjustment member 11B over the entire circumference thereof.

Reference numeral 14 denotes a holder for appropriately holding the optical component adjustment pedestal 11 on the optical pickup device, and a retaining member is provided in the holding cylinder portion 14A protruding downward so that the optical component adjustment pedestal 11 can be moved up and down. It is inserted and held in this condition.

A through hole 14B for adjusting the mounting position is bored in the side surface of the holding cylinder part 14A, and an adjustment member (not shown) is inserted into the optical component from the outside of the holding cylinder part 14A through the through hole 14B. By moving the adjustment pedestal 11 in the axial direction, the mirror 1
The mounting position in the axial direction of 2 can be adjusted.

As described above, the present invention forms the optical component adjustment pedestal 11 by storing and holding almost the entire mounting angle adjustment member 11A inside the cylindrical mounting position adjustment member 11B, and the pedestal 11 is attached to the holding cylinder part 14A. Since the length of the mounting position adjusting member 11B in the axial direction can be made sufficiently long within the holding cylinder portion 14A without blocking the optical path of the optical system, the holding The length of the joint between the inner circumferential side surface of the cylindrical portion 14A and the outer circumferential side surface of the mounting position adjusting member 11B can be maximized.

As a result, inclination in directions other than the axial direction due to the axial positional adjustment of the optical component adjustment pedestal 11 can be suppressed as much as possible, and extremely stable adjustment can be performed.

Moreover, since it is not necessary to make the holding cylinder portion 14A longer in the axial direction, the optical component adjusting device does not become larger in the axial direction.

<Effects of the invention> As described above, according to the invention, the length in the axial direction of the mounting position adjustment member of the optical component adjustment pedestal held in the holding cylinder of the holding body can be made sufficiently long. , it is possible to maximize the length of the joint between the inner circumferential side surface of the holding cylinder part and the outer circumferential side surface of the mounting position adjusting member without increasing the size of the optical component adjusting device itself in the axial direction. This provides the effect that tilting in directions other than the axial direction due to axial position adjustment of the optical component adjustment pedestal is suppressed as much as possible, and extremely stable adjustment can be performed.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the optical component adjusting device according to the present invention, FIG. 2 is an exploded perspective view of the same device, and FIG. 3 is a sectional view of a conventional optical component adjusting device.
FIG. 4 is an exploded perspective view of the conventional device same as above. 11...Plinth for adjusting optical components, 11A...Mounting angle adjustment member, 11A ₁ ...Main body, 11A ₂ ...
Optical component mounting section, 11 ₃ ... Connection section, 11B...
Mounting position adjustment member, 14...Holding body, 14A...
Holding cylinder.

Claims (1)

[Claims for Utility Model Registration] A cylindrical main body, and a plate having a smaller diameter than the main body, integrally formed with the main body via a connecting part, and capable of adjusting its angle in the horizontal direction with respect to the main body. A mounting angle adjustment member consisting of a shaped optical component mounting part,
An optical component adjustment pedestal is formed by fitting into a cylindrical mounting position adjustment member that is longer than at least the axial length of the main body, and the optical component adjustment pedestal is axially inserted into the holding cylinder portion of the holder. An optical component adjustment device characterized in that the optical component adjustment device is fitted and held in a fit-fit state so that the position can be adjusted in the direction.