Structure for adjusting optical projection focal length

Abstract

The utility model belongs to the field of headlamp projection, and particularly relates to a structure for adjusting optical projection focal length, which comprises an optical lens component, a light source support component and a plurality of screws, two sides of one end of the optical lens component are fixed on one side of the light source support component through the screws, and the optical lens component slides back and forth on the light source support component. A lens cone is arranged on the outer side of the optical lens assembly, side wings are arranged on the two side edges of the middle of the lens cone, a plurality of kidney-shaped round holes are formed in the two side wings, a bottom support is arranged on one side of the light source support assembly, two protruding blocks matched with the side wings are arranged at the bottom of the bottom support, and screws penetrate through the kidney-shaped round holes to fix the side wings and the protruding blocks. When the optical lens assembly moves back and forth for adjustment, the screws are fixed, and the two side wings move in a limited distance in the long axis direction of the kidney-shaped round hole. A special structure is additionally arranged for optical focal length adjustment, and good optical performance is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of headlamp projection, and in particular relates to a structure for adjusting the optical projection focal length. Background Art

[0002] The distance between traditional optical components and LED light sources in automotive headlights requires a large tolerance, but projection optical components have high requirements for the distance to the LED. During the assembly process of the optical components and LED light source components, the assembly error is relatively large. In addition, there will also be errors in the processing of optical components and LED light source components. Therefore, errors in processing and assembly will lead to unsatisfactory projection effects. Utility Model Content

[0003] In order to solve the above problems existing in the prior art, the utility model provides a structure for adjusting the optical projection focal length, and adds a special structure to adjust the optical focal length to achieve good optical performance.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a structure for adjusting the focal length of optical projection, comprising an optical lens assembly, a light source bracket assembly and a plurality of screws, wherein both sides of one end of the optical lens assembly are fixed to one side of the light source bracket assembly by screws and the optical lens assembly slides back and forth on the light source bracket assembly, a lens barrel is provided on the outside of the optical lens assembly, side wings are provided on both sides of the middle of the lens barrel, and a plurality of waist-circular holes are provided on the two side wings, a bottom bracket is provided on one side of the light source bracket assembly, and two protrusions adapted to the side wings are provided at the bottom of the bottom bracket, and the screws pass through the waist-circular holes to fix the side wings and the protrusions, and when the optical lens assembly moves back and forth for adjustment, the screws are fixed and the two side wings move a limited distance along the long axis direction of the waist-circular hole.

[0005] Furthermore, two guide positioning ribs are provided on the bottom surfaces of the side edges of both wings, and the guide positioning ribs protrude from the side surfaces of the side wings. The two protrusions are symmetrically arranged and the sides are provided with guide rails matching the guide positioning ribs.

[0006] Furthermore, an upward protrusion is provided on one side of the protrusion and the protrusion is located beside the guide rail.

[0007] Furthermore, the screw diameter is a, a is 3mm, the long axis of the waist hole is b, b is 5.5mm, the distance between the guide positioning ribs on both sides is c, c is 53.3±0.03mm, and the distance between the two guide rails is d, d is 53.4±0.03mm.

[0008] Furthermore, the optical lens assembly also includes a clip and several lens assemblies. The lens assembly is installed in the lens barrel, and the outer side of one end of the lens barrel is clamped by the clip. The light source bracket assembly also includes a PCBA and a heat sink. The PCBA is installed between the bottom bracket and the heat sink, and the protrusion is located on the side away from the heat sink. An opening is opened on the bottom bracket, and the end of the lens barrel away from the clip passes through the opening.

[0009] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a simple structure and is easy to assemble and adjust. By setting guide positioning ribs at the bottom of both sides of the lens barrel, setting waist circular holes on both sides, and then setting guide rails on the bottom bracket of the light source, the screws fix the optical lens assembly to the light source bracket assembly through the waist circular holes, so that the optical lens assembly can slide along the guide rails on the light source bracket assembly, and adjust the focal length back and forth within the limited length of the long axis of the waist circular hole, effectively compensating for processing and assembly errors and achieving good optical performance; in addition, the gap between the guide positioning ribs on both sides and the guide rails is 0.05mm, which can ensure that the left and right offset during the adjustment process will not be too large to affect the projection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0011] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0012] Figure 3 This is a schematic diagram of the structure of the optical lens assembly of the utility model;

[0013] Figure 4 This is an exploded view of the optical lens assembly of the utility model;

[0014] Figure 5 This is a schematic diagram of the structure of the light source bracket assembly of the utility model;

[0015] Figure 6 This is an exploded view of the light source bracket assembly of the utility model;

[0016] Figure 7 for Figure 2 Enlarged view of point B in the middle;

[0017] Figure 8 This is a top view of the utility model;

[0018] Figure 9 for Figure 8 Cross-sectional view at AA in the middle. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-9 The technical solution provided by the present invention is as follows: a structure for adjusting the focal length of optical projection, comprising an optical lens assembly 1, a light source bracket assembly 2 and a plurality of screws 3, wherein both sides of one end of the optical lens assembly 1 are fixed to one side of the light source bracket assembly 2 by screws 3 and the optical lens assembly 1 slides back and forth on the light source bracket assembly 2, thereby adjusting the optical focal length, effectively compensating for processing and assembly errors, and achieving good optical performance; a lens barrel 11 is provided on the outside of the optical lens assembly 1, and side wings are provided on both sides of the middle of the lens barrel 11, and a plurality of waist holes 111 are provided on the two side wings, and the plurality of waist holes 111 on each side are arranged in the same axial direction of the lens barrel 11, a bottom bracket 21 is provided on one side of the light source bracket assembly 2, and two protrusions adapted to the side wings are provided at the bottom of the bottom bracket 21, and the screws 3 pass through the waist holes 111 to fix the side wings and the protrusions. When the optical lens assembly 1 moves back and forth for adjustment, the screws 3 are fixed and the two side wings move a limited distance along the long axis direction of the waist holes 111.

[0021] Specifically, two guide positioning ribs 112 are provided on the bottom surfaces of the side edges of the two wings, and the guide positioning ribs 112 protrude from the side surfaces of the side wings. The two protrusions are symmetrically arranged and the sides are provided with guide rails 211 that match the guide positioning ribs 112. When the two side wings are fixed on the two protrusions, the length direction of the guide rail 211 is along the axial direction of the lens barrel 11. The guide rail 211 on the protrusion is a groove. The guide positioning ribs 112 on the two side wings are stuck on the guide rails 211 on both sides. When the guide positioning ribs 112 on the two side wings slide back and forth along the guide rails, the screw 3 slides relatively on the long axis of the waist hole 111, and the setting of the screw 3 and the waist hole 111 plays a limiting role.

[0022] Specifically, an upward protrusion 212 is provided on one side of the protrusion and the protrusion 212 is located beside the guide rail 211 . The protrusion 212 is provided to prevent the guide positioning rib 112 from slipping off when sliding on the guide rail 211 .

[0023] Specifically, the diameter of the screw 3 is a, a is 3 mm, the long axis of the waist hole 111 is b, b is 5.5 mm, and the remaining gap in the long axis direction of the waist hole 111 is 2.5 mm. The optical lens assembly 1 can move up and down 1.25 mm in the optical axis direction to adjust the optical focal length. The distance between the guide positioning ribs 112 on both sides is c, c is 53.3±0.03 mm, and the distance between the two guide rails 211 is d, d is 53.4±0.03 mm. The gap between the single-sided guide positioning rib 112 and the guide rail 211 is 0.05 mm, which can ensure that the left and right offset of the guide positioning rib 112 on the guide rail 211 during the adjustment process will not be too large to affect the projection effect of the optical parts.

[0024] Specifically, the optical lens assembly 1 also includes a buckle 12 and several lens assemblies 13. The lens assembly 13 is installed in the lens barrel 11, and the outer side of one end of the lens barrel 11 is clamped by the buckle 12. The light source bracket assembly 2 also includes a PCBA22 and a radiator 23. A light source is provided on the PCBA22. The PCBA22 is installed between the bottom bracket 21 and the radiator 23. The protrusion is located on the side away from the radiator 23. An opening 213 is opened on the bottom bracket 21, and the end of the lens barrel 11 away from the buckle 12 passes through the opening 213. The light source on the PCBA22 is irradiated to the optical lens assembly 1 in the opening 213, and good optical performance is achieved after projection by the optical lens assembly 1.

[0025] The process of adjusting the optical projection focal length of the present invention is as follows: after the optical lens assembly 1 is installed on the light source bracket assembly 2, the optical lens assembly 1 is moved forward and backward so that the guide positioning ribs 112 on both side wings slide forward and backward along the guide rails, so that the two side wings move forward or backward by 1.25 mm along the long axis direction of the waist circular hole 111, thereby adjusting the optical focal length.

[0026] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A structure for adjusting the focal length of optical projection, comprising an optical lens assembly (1), a light source bracket assembly (2) and a plurality of screws (3), characterized in that: The optical lens assembly (1) is fixed to one side of the light source support assembly (2) on both sides by screws (3), and the optical lens assembly (1) slides forward and backward on the light source support assembly (2). A barrel (11) is provided on the outside of the optical lens assembly (1), and side wings are provided on both sides of the middle of the barrel (11). A plurality of waist holes (111) are provided on the two side wings. A bottom bracket (21) is provided on one side of the light source support assembly (2), and two protrusions adapted to the side wings are provided at the bottom of the bottom bracket (21). The screws (3) pass through the waist holes (111) to fix the side wings and the protrusions together. When the optical lens assembly (1) is moved forward and backward for adjustment, the screws (3) are fixed and the two side wings move a limited distance along the long axis direction of the waist hole (111).

2. The structure for adjusting the focal length of optical projection according to claim 1, characterized in that: Two guide positioning ribs (112) are provided on the bottom surfaces of the side edges of the two side wings. The guide positioning ribs (112) protrude from the side surfaces of the side wings. The two protrusions are symmetrically arranged and the sides are provided with guide rails (211) that match the guide positioning ribs (112).

3. The structure for adjusting the focal length of optical projection according to claim 2, characterized in that: An upward protrusion (212) is provided on one side of the protrusion, and the protrusion (212) is located beside the guide rail (211).

4. The structure for adjusting the focal length of optical projection according to claim 3, characterized in that: The diameter of the screw (3) is a, which is 3 mm. The long axis of the waist hole (111) is b, which is 5.5 mm. The distance between the guide positioning ribs (112) on both sides is c, which is 53.3 ± 0.03 mm. The distance between the two guide rails (211) is d, which is 53.4 ± 0.03 mm.

5. The structure for adjusting the focal length of optical projection according to claim 4, characterized in that: The optical lens assembly (1) further comprises a buckle (12) and a plurality of lens assemblies (13), wherein the lens assembly (13) is mounted in the lens barrel (11), and the outer side of one end of the lens barrel (11) is clamped by the buckle (12). The light source bracket assembly (2) further comprises a PCBA (22) and a heat sink (23), wherein the PCBA (22) is mounted between the bottom bracket (21) and the heat sink (23), wherein the protrusion is located on a side away from the heat sink (23), and an opening (213) is provided on the bottom bracket (21), and an end of the lens barrel (11) away from the buckle (12) passes through the opening (213).

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