JPS6330801Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical component mounting and adjusting structure, and more particularly to an optical component mounting and adjusting structure that adjusts the optical component by moving it in the optical axis direction.

Conventionally, for example, in an optical disk player, an objective lens and other optical components have been placed in the optical path because it is necessary to irradiate the disk with a laser beam in order to reproduce signals recorded on the disk. However, optical components such as lenses are usually mounted inside a holder, and it is necessary to adjust the mounting position. However, due to demands for miniaturization of reading devices, etc., there are many restrictions on the design of adjustment structures, and there is no suitable structure in the prior art.

The present invention has been made in view of the above-mentioned points, and its purpose is to provide an optical component mounting adjustment structure that allows fine adjustment of the mounting position of an optical component in the optical axis direction easily and reliably. This is what I am trying to do.

An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 are an exploded view and an assembled view of an embodiment of the present invention.

1 is a holder holding base on which the holder 2 is to be attached;
3 is a chassis on which the object to be attached is to be attached.

The holder 2 is formed into a substantially cylindrical shape as shown in FIGS. 5 and 6, and optical components such as a lens and a light receiving element are mounted inside, and an adjustment driver 9 shown in FIG. 9 is mounted on the outer periphery. An engagement groove 2A is formed into which a drive pin 9A provided at the tip is inserted (see FIG. 1). Further, the holder holding base 1 has a driver insertion hole 1A formed in its upper surface. Furthermore, a substantially rectangular hole 1C is bored in the lower surface as shown in FIG.
C ₁ and 1C ₁ are provided, and an elongated hole 1D is formed on one side of the same horizontal axis B perpendicular to the axis A located at the center of the holder receiving hole 1B on the left and right sides of the holder receiving hole 1B. At the same time, a passive pin 1E is formed on the other side.

The holder accommodating hole 1B has a holder 2 above it.
V-shaped slope portion 1b ₁ , 1b ₁ that contacts the circumferential surface at two points
In addition, the driver insertion hole 1A is provided in the center of the slope portions 1b ₁ and 1b ₁ to restrict the movement of the adjustment driver 9 by rotatably inserting the tip of the adjustment driver 9. ing.

Reference numeral 4 denotes a spring material, and as shown in FIG.
By facing inside C, it comes into contact with the lower surface of the holder 2 in cooperation with the V-shaped slope portions 1b ₁ and 1b ₁ of the holder accommodation hole 1B which are in contact with the circumferential surface of the holder 2 at two points. 3 in the holder accommodation hole 1B.
A spring tongue piece 4A for point support is formed at the center. The spring tongue piece 4A is formed by cutting off one end and curved into a medium-height shape so as to bias and support the holder 2 to prevent rattling.
Reference numeral 5 denotes a fixing member whose left and right sides are overlapped with the spring material 4 and screwed to the holder holding base 1. On the left and right sides of this fixing member 5, screw holes 4a formed on the left and right sides of the spring material 4, Screw hole 5 overlapping with 4a
a, 5a are formed. 5b is an embossed hole formed approximately in the center of the fixing member 5. 6 is a fixing screw; 7 is a spring tongue piece 4 screwed into the embossed hole 5b and in contact with the circumferential surface of the holder 2;
This is a fixing screw whose tip is pressed against the back surface of the holder 2. By providing the spring tongue piece 4A, the holder 2 is firmly supported by the spring tongue piece 4A.

One embodiment of the present invention has the configuration described above.

In order to hold the holder 2 into which the lens, light receiving element, etc. are fitted, in the holder holding base 1, a holder accommodation hole 1B provided in the holder holding base 1 is used.
Insert the holder 2 into the interior, and then insert the fixing member 5 and the spring material 4, whose left and right sides overlap with each other, into the overlapping screw holes 4a, 4a, 5a, 5a with the fixing screws 6, 6. Screw it by screwing it in. As a result, the spring tongue piece 4A formed on the spring material 4 is connected to the hole 1C formed in the holder holding base 1.
He comes within. As a result, the holder 2 inserted into the holder accommodation hole 1B of the holder holding base 1 is attached to the slope portions 1b ₁ , 1 formed above the holder accommodation hole 1B.
It is mounted in the holder 2 by being supported at three points: b ₁ and the spring tongue piece 4A of the spring material 4.

Next, the operation of the adjustment structure according to the present invention will be described.

When the tip of the adjustment driver 9 is inserted into the driver insertion hole 1A provided on the top surface of the holder holding base 1 and rotated, the drive pin 9A provided at an eccentric position at the tip of the adjustment driver 9 will be inserted into the holder 2. It is inserted into an engagement groove 2A formed on the outer periphery, and the inner wall of this engagement groove 2A is pressed in the direction of rotation by rotating the adjustment driver 9.

Here, the holder 2 includes the slope portions 1b ₁ , 1b ₁ and the spring tongue piece 4 of the spring material 4 in the paper direction of FIG.
Since it is regulated by A, it moves only in the direction perpendicular to the plane of the paper, that is, in the direction A shown in FIG.

As explained above, in the optical component mounting adjustment structure according to the present invention, the holder with the optical component attached is urged by the elastic member in a direction perpendicular to the sliding direction of the holder holding base. At the same time, the drive pin of the adjustment driver inserted into the driver insertion hole engages with the engagement groove on the circumferential surface of the holder, so the rotation of the adjustment driver causes the holder to move only in the optical axis direction. The state of the holder relative to the holder holding base is maintained constant during and after the adjustment, and fine adjustment of the optical axis direction of the optical component attached to the holder can be performed accurately and easily. In addition to this, there is no need to consider the clearance between the holder and the holder holding base.

Moreover, it is possible to obtain a precise adjustment structure with an extremely simple structure without increasing the number of parts other than the holder to which the optical component is attached, the holder base, and the elastic member.

In addition, since adjustment is performed from a plane perpendicular to the adjustment direction, when used as a position adjustment structure for optical components, there is no problem of blocking the optical path during adjustment, and the adjustment structure is perpendicular to the adjustment direction. Since it can be installed anywhere on the flat surface,
Even when storage space is limited, there is still a degree of freedom in design, which is extremely desirable.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway exploded rear view showing one embodiment of the holder mounting adjustment structure of the present invention, Fig. 2 is a rear view of the assembled state, and Fig. 3 is a holder holding base constituting this embodiment. FIG. 4 is a bottom view, FIG. 5 is a vertical cross-sectional view of the holder that constitutes this embodiment, FIG. 6 is a cross-sectional view of the holder, and FIG. 7 is a cross-sectional view of the holder that constitutes this embodiment. FIG. 8 is a perspective view of the fixing member constituting this embodiment. FIG. 9 is a perspective view showing the adjustment driver also constituting this embodiment. FIGS. 10 a to c are perspective views of the present embodiment. FIG. 1...Holder holding base, 1A...Driver insertion hole, 2...Holder, 2A...Engagement groove, 1B...Holder accommodation hole, _1b1 , _1b1 ...Slope portion, 4...Spring material, 4A... Spring tongue piece, 5... Fixing member, 9...
...adjustment driver, 9A...drive pin.

Claims (1)

[Scope of utility model registration request] A holder on which an optical component is attached, a holder holding base on which the holder is slidably supported in the direction of the optical axis of the optical component and a driver insertion hole is formed, and the holder is mounted on the holder holding base. An elastic member is provided on the circumferential surface of the holder at an eccentric position for an adjustment driver to be rotatably inserted into the driver insertion hole. An engagement groove into which a drive pin fits is provided, and adjustment is performed by engaging the drive pin in the engagement groove and moving the holder in the optical axis direction of the optical component by rotating the adjustment driver. Mounting and adjustment structure for optical components.