KR200292526Y1 - A position-control structure for collimate lens - Google Patents

Abstract

The present invention relates to a positioning structure of a collimator lens, and in particular, a case, a PCB substrate, a laser element assembled to the PCB substrate to emit a laser beam, and converts the laser beam emitted from the laser element into parallel light A collimator lens, shaping means having an opening formed to shape the parallel light passing through the collimator lens into a predetermined shape, and a laser beam shaped by the shaping means is driven at a constant speed by a motor so as to deflect at a constant speed, and six surfaces In the position of the collimator lens positioning structure comprising a polygun equipped with a polygun mirror having a reflective surface and an imaging lens having an fθ characteristic so that the laser beam deflected by the polygun mirror of the polygon is formed as spot light on the photosensitive drum, The collimator lens is accommodated so that it can be adjusted in three axis directions in the xyz direction. And a lens holder having a protrusion formed thereon, and the lens holder being positioned and fixed in three axial directions in the xyz direction, and at the same time the PCB substrate is assembled to support means fixed to the case. It relates to a lens holder with a built-in collimator lens can be easily fixed and then fixed in place in the three-dimensional xyz direction from the upper portion of the holder support of the support means consisting of a compact structure to improve the productivity and manufacturing cost As well as being able to be down, it is possible to supply a high quality laser unit by accurately matching the focal point of the collimator lens and the light emitting point of the laser element.

Description

A position-control structure for collimate lens}

The present invention is a laser unit in which an image is formed by a digital signal using a laser beam, such as a digital copying machine, a laser beam printer, a CD player, and the like. It relates to the positioning structure of the collimator lens of the laser unit for adjusting and fixing the position of the collimator lens in order to maintain the characteristics, in particular the collimator is installed in front of the ray device for emitting the laser beam so that the laser beam is converted into parallel light The present invention relates to a collimator lens positioning structure capable of improving productivity and lowering the manufacturing cost by allowing a compact lens to be easily adjusted and fixed in a three-axis direction by a compact structure.

In general, in a laser unit that forms an image by a digital signal using a laser beam, such as a digital copying machine, a laser beam printer, a CD player, etc., the parallelism between the direction of the laser beam (optical axis characteristic) and the beam speed (coli) The position adjustment structure of the collimator lens of the laser unit for adjusting and fixing the position of the collimator lens in order to maintain the mate characteristics has been variously proposed in various forms.

As an example of such a position adjustment structure of the collimator lens of the conventional laser unit, Japanese Patent Laid-Open No. 11-242147, which was published in Japan on September 7, 1999, has been proposed.

Japanese Patent Laid-Open No. 11-242147 discloses a resin laser holder 10 'supporting a semiconductor laser S as a light source as shown in Figs. 1 to 6, and a collimator for shaping a laser beam into a predetermined beam shape. It consists of a lens holder 20 'which supports the lens C and is disposed at a predetermined distance from the semiconductor laser S, and a circuit board portion P for driving control of the semiconductor laser S. In the fixed light source device, the laser holder 10 'is provided with a screw mounting portion having a screw hole for both fixing the laser holder 10', the circuit board P, and the optical box. It is done.

Next, the adjustment and assembly of the light source device of Patent Publication No. Hei 11-242147 will be described.

1 to 3 illustrate the assembled state of the laser holder 10 ', the semiconductor laser S, and the circuit board P. As shown in FIG.

As shown in Fig. 2, the semiconductor laser S is directly pressed into and fixed to the inner circumferential surface of the cylindrical portion 11 'of the laser holder 10'.

In addition, the circuit board P is a screw mounting hole of the circuit board P in a state in which the lead pin S1 of the semiconductor laser S passes through the hole formed in the circuit board P. It penetrates through P10 and engages with the lower hole 16b of the screw hole 16 of the laser holder 10 '.

In addition, as shown in FIGS. 3 and 4, the lead pin S1 of the semiconductor laser S is temporarily assembled to the circuit board P, and in this state, the support pin of the semiconductor laser S is formed.

In addition, the collimator lens (C) is fitted to the mounting hole (21 ') of the lens holder 20', it is fixed by bonding or heat fusion to form a lens support unit.

Further, optical adjustment and assembly as a light source device are performed in the state of two units of the support unit of the semiconductor laser S and the lens support unit.

Further, adjustment and assembly are performed in the optical axis direction of the lens holder 20 'in the radial interval range of the inner circumferential portion of the lens holder 20' and the outer circumferential portion of the cylindrical portion 11 'of the laser holder 10'. After adjusting the collimator lens C, the lens holder 20 'and the laser holder 10' are adhesively fixed to form the light source device E. FIG.

5 and 6 show a state in which the light source device E is assembled to the optical case H, where H10 is a fitting hole fitted with the affected part of the laser holder 10 ', and H20 is A hole engaged with the screw K, and H30 is a positioning pin for regulating the rotational position of the light source device E. FIG.

That is, the annular portion of the light source device E is fitted with the fitting hole H10 of the optical case H, and the positioning pin H30 is positioned as a positioning hole formed in the flange of the laser holder 10 '. By inserting, the light source device E and the optical case H are assembled in the state shown in FIG.

In the prior art, Japanese Patent Application Laid-Open No. 11-242147 discloses an optical axis direction in a state in which the collimator lens C is accommodated in the lens holder 20 'after the semiconductor laser S is temporarily assembled to the circuit board P. Z direction) so that the lens holder 20 'is fixed to the laser holder 10'.

That is, when adjusting the position of the collimator lens C in order to maintain the directionality (optical axis characteristic) of the laser beam emitted from the semiconductor laser (S) and the parallelism (collimate characteristic) of the optical axis, the collimator lens (C) To adjust the position in the three-axis direction of xyz, Japanese Patent Laid-Open No. 11-242147 discloses that the lens holder 20 'is in the optical axis direction when the semiconductor laser S is temporarily assembled to the circuit board P. The lens holder 20 'is fixed to the laser holder 10' by being moved in the (Z direction), and the collimator lens C housed in the lens holder 20 'is subsequently fixed in the xy direction. Of course, the laser semiconductor (S) must be fixed to the circuit board (P).

Therefore, in the related art, since the three-axis direction xyz cannot be adjusted in one step of the collimator lens, there are various problems such as a decrease in productivity and an increase in manufacturing cost.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to easily fix the lens holder in which the collimator lens is embedded in a three-dimensional position in the xyz direction by a compact structure and to be fixed after being easily fixed. The present invention provides a collimator lens positioning structure that can improve productivity and supply high quality laser units.

1 to 6 are process charts showing the assembling process of the collimator lens according to Japanese Patent Laid-Open No. 11-242147 applied to a conventional example.

Figure 7 is a schematic diagram showing the configuration of a laser unit with a collimator lens applied to the present invention.

Figure 8 is an exploded perspective view showing an exploded PCB substrate and the support means and the lens holder applied to the present invention.

9 is a perspective view showing a support means applied to the present invention.

Figure 10 is a cross-sectional view showing a state in which the PCB substrate and the support means and the lens holder is applied to the present invention.

* Description of the symbols for the main parts of the drawings *

10 PCB board 11

20 ... laser element 30 ... collimator lens

40 Lens holder 41 Adjusting projection

50 Support means 51 Holder support

52 Case fixing 53 Vertical support

54 ... laser element housing 55 ... PCB assembly protrusion

60 ... Case 61 ... Positioning protrusion

70 ... orthopedic means 71 ... opening

80 ... Polygon 81 ... Polygon Miller

90 imaging lens

In order to achieve the above object, the position adjustment structure of the collimator lens of the present invention includes a case for forming an appearance of a laser unit, a PCB board assembled with the plurality of IC components, and assembled with the PCB board. A laser element for emitting a laser beam, a collimator lens for converting the laser beam emitted from the laser element into parallel light, and shaping means formed with openings for shaping parallel light transmitted through the collimator lens into a predetermined shape; A polygun equipped with a polygun mirror having six reflective surfaces and driven at a constant speed by a motor such that the laser beam shaped by the shaping means is deflected at an equiangular speed, and a laser beam deflected by the polygun mirror of the polygun is formed on the photosensitive drum. Positioning of the collimator lens consisting of an imaging lens having an fθ characteristic to form an image in spot light In the structure, the lens holder is formed in the projection projection projection protrusion to accommodate the collimator lens to adjust the position in the three-axis direction of the xyz direction, and the lens holder is fixed to the position adjusted in the three-axis direction of the xyz direction, of course And the PCB substrate is assembled, characterized in that consisting of the support means fixed to the case.

According to the position adjustment structure of the collimator lens according to the present invention, the lens holder incorporating the collimator lens is easily adjusted to the correct position in three dimensions in the xyz direction from the upper portion of the holder support of the support means having a compact structure. Since it can be fixed afterwards, productivity can be improved and manufacturing cost can be reduced, and a high quality laser unit can be supplied by accurately matching the focal point of the collimator lens and the light emitting point of the laser device.

Hereinafter, an embodiment of the position adjusting structure of the collimator lens applied to the present invention will be described in detail with reference to the accompanying drawings.

7 is a schematic view showing the configuration of a laser unit equipped with a collimator lens to be applied to the present invention, Figure 8 is an exploded perspective view showing an exploded PCB substrate, support means and lens holder applied to the present invention. 9 is a perspective view showing a support means applied to the present invention, Figure 10 is a cross-sectional view showing a state in which the PCB substrate and the support means and the lens holder is applied to the present invention.

7 to 10, reference numeral 10 denotes a PCB substrate on which a plurality of ICs are assembled, and reference numeral 20 denotes a laser device in which a laser beam is radiated by a control signal of an IC of the PCB substrate 10. Stuck to 10).

In addition, in the PCB substrate 10 to which the laser device 20 is fixed, a coupling hole 11 having a diameter of D1 is drilled so that the PCB substrate 10 is assembled with the support means described later. .

In addition, four coupling holes 11 are perforated on the outside of the laser device 20, but the number of coupling holes 11 is not limited in the present invention.

Reference numeral 30 denotes a collimator lens for converting the laser beam emitted from the laser element 20 into parallel light, which is housed in a cylindrical lens holder 40.

In addition, the lens holder 40 of the lens holder 40 so that the light emitting point of the laser beam emitted from the laser element 20 coincides with the focal point of the collimator lens 30 so that the ray point beam is converted into parallel light. The adjustment protrusion 41 which can adjust a position in the three-axis direction of xyz protrudes, and is formed.

That is, the adjustment protrusion 41 formed on the lens holder 40 is mounted on a jig means (not shown) to adjust the position of the lens holder 40 in the three-axis direction of xyz and store it in the lens holder 40. The focus of the collimator lens 30 is coincided with the light emitting point of the laser beam emitted from the laser device 20 to convert the laser beam emitted from the laser device 20 into parallel light.

In addition, the adjustment protrusion 41 formed in the lens holder 40 has a width of t and a length thereof as shown in FIG. 8 so that the adjustment protrusion 41 easily flows in the adjustment space of the supporting means described later. consists of l

On the other hand, the reference numeral 50 is a support means for assembling the lens holder 40 and the PCB substrate 20 is assembled to the case 60 of the laser unit, a semi-circular arc holder holder for supporting the lens holder 40 A case fixing part 52 formed at both sides of the holder support part 51 so that the lens holder 40 supported by the holder support part 51 is assembled to the case 60, and the case 51. The laser beam passing hole 531 is formed so that the laser beam emitted from the laser device 20 is projected to the collimator lens 30 accommodated in the lens holder 40 assembled between the fixing parts 52. The vertical support part 53 receives the laser device 20 to project the laser beam emitted from the laser device 20 into the support part 53 and the laser beam passing hole 531 of the vertical support part 53. A laser element storage portion 54 protruding from the laser element storage portion; To 54 wherein the laser device (20) to be received, to build in the coupling hole 11 of the PCB substrate 10 is made of a PCB assembly projection 55 formed be protruding from the vertical support (53).

That is, the support means 50, the holder support portion 51, the case fixing portion 52, the vertical support portion 53, the laser element storage portion 54 and the PCB assembly protrusion 55 integrally By injection molding to support the PCB substrate 10 and the lens holder 40 is assembled to the case 60.

In addition, the lens holder 40 is positioned in the three-axis direction of xyz by adjusting the adjustment protrusion 41 of the lens holder 40 on the holder support part 51 of the support means 50. The adjusting projection 41 is accommodated so that the laser beam transmitted through the collimator lens 30 stored in the holder 40 is converted into parallel light, and has a cross-sectional area larger than the cross-sectional area t x l of the adjusting projection 41. The adjusting space portion 511 formed of (TXL) is formed.

That is, since the adjustment space portion 511 is formed in the holder support portion 51 with a cross-sectional area TXL greater than the cross-sectional area t X l of the adjustment protrusion 41, the lens holder in the holder support portion 51. When the 40 is accommodated, the lens holder 40 is moved in the three-axis direction of xyz to be accommodated in the lens holder 40 by positioning the adjustment protrusion 41 in the three-axis direction of xyz by the jig means. The collimator lens 30 is positioned and the laser beam emitted from the laser element 20 is converted into parallel light by the collimator lens 30.

In addition, the case fixing portion 52 of the support means 50, the fixing groove 521 and the assembly groove 522 is formed in the case 60 so that the support means 50 is firmly assembled in place. It is.

That is, when the assembly groove 522 is positioned in the position fixing protrusion 61 formed in the case 60, the support means 50 is positioned in the case 60, and the support means 50. When the bolt B is fastened to the fixing groove 521 in the state in which the case 60 is positioned, the support means 50 is firmly assembled to the case 60.

In addition, in the PCB assembly protrusion 55 of the support means 50, the PCB substrate 10 is spaced apart from the support means 50 by a predetermined distance so that the coupling hole 11 can be easily and firmly assembled. The insertion part 551 is inserted and has a diameter D2 substantially the same as the diameter D1 of the coupling hole 11, and when the insertion portion 551 is inserted into the coupling hole 11, the PCB substrate 10 is inserted into the coupling hole 11. ) Is in surface contact with the PCB substrate 10 around the coupling hole 11 so as to be spaced apart from the support means 50 by a predetermined distance, and has a diameter D3 greater than the insertion portion 551. Is provided.

That is, when the coupling hole 11 of the PCB substrate 10 is inserted into the insertion portion 551 of the support means 50 and the surface contact portion 552 of the support means 50 as shown in FIG. The PCB substrate 10 is in surface contact so that the support means 50 and the PCB substrate 10 are spaced apart by a predetermined distance so that the support means 50 and the PCB substrate 10 are assembled. When (B) is fastened to the coupling hole 11, the PCB substrate 10 and the support means 50 will be firmly assembled.

In the figure, reference numeral 70 in the drawing denotes a forming means (APERTURE) having an opening 71 formed to shape the parallel light passing through the collimator lens 30 into a predetermined shape, and is fixed to the supporting means 50. .

Reference numeral 80 denotes a polygun driven at a constant speed by a motor so that the laser beam shaped by the shaping means 70 is deflected at a constant speed, and a polygun mirror 81 having six reflective surfaces is provided.

Reference numeral 90 denotes an imaging lens having an fθ characteristic so that the laser beam deflected by the polygun mirror 81 of the polygon 80 is formed as spot light on the photosensitive drum.

Next, the assembly process and the effect of the collimator lens positioning structure according to the present invention configured as described above will be described.

First, the collimator lens 30 is accommodated in the lens holder 40 to fix the collimator lens 30 to the lens holder 40.

In addition, after assembling the collimator lens 30 to the lens holder 40, the adjustment projection 41 formed in the lens holder 40 to the adjustment space portion 511 of the support means 50. The lens holder 40 is inserted into the holder support 51 of the support means 50.

In addition, after the lens holder 40 is seated on the support means 50, the lens holder 40 in which the collimator lens 30 is housed in the three-axis direction of xyz is used as a jig means and a monitor not shown. By adjusting the position, the lens holder 40 is assembled without flowing to the support means 50 through a coupling means such as a bond or the like.

That is, since the adjustment space portion 511 is formed in the holder support portion 51 with a cross-sectional area TXL greater than the cross-sectional area t X l of the adjustment protrusion 41, the lens holder in the holder support portion 51. When the 40 is accommodated, the lens holder 40 is moved in the three-axis direction of xyz to be accommodated in the lens holder 40 by positioning the adjustment protrusion 41 in the three-axis direction of xyz by the jig means. The collimator lens 30 is positioned so that the laser beam emitted from the laser element 20 can be converted into parallel light by the collimator lens 30.

In addition, after assembling the support means 50 and the lens holder 40 by positioning the lens holder 40 in the holder support part 51 of the support means 50, the laser device 20 Assemble the PCB substrate 10 is assembled to the support means (50).

That is, in the PCB assembly protrusion 55 of the support means 50, the diameter D2 is inserted into the coupling hole 11 of the PCB substrate 10 and is substantially the same as the diameter D1 of the coupling hole 11. When the insertion portion 551 and the insertion portion 551 is inserted into the coupling hole 11, the PCB substrate 10 around the coupling hole 11 so as to be spaced apart from the support means 50 by a predetermined distance. The surface contact portion 552 having a diameter (D3) larger than the insertion portion 551 and the surface contact with the PCB substrate 10 of the provided, so that the PCB in the insertion portion 551 of the support means 50 When the coupling hole 11 of the substrate 10 is inserted, the surface contact portion 552 of the support means 50 and the PCB substrate 10 are in surface contact with the support means 50 as shown in FIG. 10. The PCB substrate 10 is spaced at a predetermined distance so that the support means 50 and the PCB substrate 10 are assembled. In this state, when the bolt B is tightened to the coupling hole 11, the PCB substrate 10 ) And the support means (50) Which will be firmly assembled.

In addition, when the PCB substrate 10 and the support means 50 are assembled, the laser device 20 assembled to the PCB substrate 10 is housed in the laser device storage portion 54 of the support means 50. Therefore, the laser beam radiated from the laser device 20 can pass through the laser beam passing hole 531 of the support means 50.

In addition, a shaping means 70 having an opening 71 is assembled on the front surface of the holder supporting part 51 of the supporting means 50 to shape the laser beam transmitted through the collimator lens 30.

In addition, after the PCB substrate 10, the lens holder 40, and the shaping means 70 are assembled to the support means 50, the position fixing protrusion 61 formed on the case 60 may be attached to the support protrusion 50. When the assembly groove 522 of the support means 50 is positioned, the support means 50 is positioned in the case 60, and the support means 50 is positioned in the case 60. When the bolt (B) is tightened to the fixing groove 521 is to be completed as the support means 50 is firmly assembled to the case 60.

As described above, the support means 50 is provided with a holder support portion 51 having a semi-circular arc shape, and an adjustment space portion 511 is formed in the holder support portion 51 to move the lens holder 40 in the 3-axis direction of XYZ. By easily adjusting the position so that the lens holder 40 can be assembled to the support means (50).

As described above, according to the position adjusting structure of the collimator lens according to the present invention, the lens holder incorporating the collimator lens is easily positioned in the three-dimensional xyz direction on the holder support of the support means having the compact structure. Since it can be fixed after adjustment, the productivity can be improved and the manufacturing cost can be reduced, and the high quality laser unit can be supplied by accurately matching the focal point of the collimator lens and the light emitting point of the laser device.

Claims (5)

A case 60 for forming an appearance of a laser unit, a PCB substrate 10 assembled to the case 60 and assembled with a plurality of IC components, and a laser assembled to the PCB substrate 10 to radiate a laser beam; An opening to shape the element 20, the collimator lens 30 for converting the laser beam emitted from the laser element 20 into parallel light, and the parallel light transmitted through the collimator lens 30 in a predetermined shape. Forming means (70) formed with the 71, and the polygun miller 81 is driven at a constant speed by a motor so that the laser beam shaped by the forming means 70 is deflected at an isometric speed and has six reflective surfaces. Positioning structure of the collimator lens consisting of the polygon 80 and the imaging lens 90 having the fθ characteristic so that the laser beam deflected by the polygun mirror 81 of the polygon 80 is formed as spot light on the photosensitive drum. In A lens holder 40 in which the adjustment protrusion 41 is protruded so as to accommodate the collimator lens 30 and adjust the position in the three-axis direction in the xyz direction; The lens holder 40 is positioned in the three-axis direction in the xyz direction to be fixed, as well as the PCB substrate 10 is assembled, characterized in that made of a support means 50 fixed to the case 60 Collimator lens positioning structure. The method of claim 1; The support means (50) is; Supporting the PCB substrate 10 and the lens holder 40 so as to be assembled to the case 60; A semi-circular arc holder holder 51 for supporting the lens holder 40; A case fixing part 52 formed at both sides of the holder support part 51 such that the lens holder 40 supported by the holder support part 51 is assembled to the case 60; The laser beam passing hole 531 is projected so that the laser beam emitted from the laser device 20 is projected to the collimator lens 30 accommodated in the lens holder 40 assembled between the case fixing parts 52. Formed vertical support portion 53, The laser device is formed by receiving the laser device 20 to project the laser beam emitted from the laser device 20 to the laser beam through hole 531 of the vertical support portion 53 and protruded to the vertical support portion 53 With the storage part 54, The PCB assembly protrusion 55 is assembled to the coupling hole 11 of the PCB substrate 10 so that the laser device 20 is accommodated in the laser device housing 54 and protrudes from the vertical support part 53. Done; Collimator lens, characterized in that the holder support 51, the case fixing portion 52, the vertical support 53, the laser element storage portion 54 and the PCB assembly protrusion 55 is integrally injection molded Positioning structure. The method of claim 2, The adjustment protrusion 41 formed in the lens holder 40 is made of a width of t and a length of l, The lens holder 40 is positioned in the three-axis direction of xyz by adjusting the adjustment protrusion 41 of the lens holder 40 to the holder support part 51 of the support means 50. The adjustment space 511 is formed to have a cross-sectional area (TXL) larger than the cross-sectional area (t X l) of the adjustment projection 41 so that the laser beam transmitted through the collimator lens 30 stored in the Positioning structure of the collimator lens, characterized in that. The method of claim 2, The PCB substrate 10 is drilled with a coupling hole 11 having a diameter of D1, The PCB assembly protrusion 55 of the support means 50 is inserted into the coupling hole 11 so that the PCB substrate 10 is easily and firmly assembled at a predetermined distance from the support means 50. The insertion part 551 having a diameter D2 substantially the same as the diameter D1 of the coupling hole 11, and when the insertion portion 551 is inserted into the coupling hole 11, the PCB substrate 10 is attached to the insertion hole 551. The surface contact portion 552 is provided in surface contact with the PCB substrate 10 around the coupling hole 11 so as to be spaced apart from the supporting means 50 by a predetermined distance, and having a diameter D3 larger than the insertion portion 551. Positioning structure of the collimator lens, characterized in that. The method of claim 2, In the case fixing part 52 of the support means 50, the fixing groove 521 and the assembly groove 522 are formed in the case 60 so that the support means 50 is firmly assembled at the correct position. A collimator lens positioning structure.