Optical device for a motor vehicle headlight comprising optical waveguides

Abstract

The invention relates to an optical device (1) for a motor vehicle headlight, said device comprising the following: a primary optical element (100) having a main body (101) and a plurality of optical waveguide bodies (110) having a light-receiving surface (120) and a light-emitting surface (130); a holder (200) on which the primary optical element (100) is arranged, wherein the optical waveguide bodies (110) penetrate the holder (200) via an opening region (201) of the holder; and a covering element (300) which is arranged on the holder (200) and comprises openings (310) which receive the optical waveguide bodies (110), wherein the covering element (300) can be connected to the holder by means of a projection (420) comprising an engaging section (421) and an end section (422) and a guide recess (410) having a first region (411) and a second region (412), said second region extending in a slip-on direction (X), wherein the projection (420) can be inserted in the first region (411) such that the second region (412) can be slipped onto the engaging section (421) by means of the movement of the covering element (300) in the slip-on direction (X).

Claims

1. An optical device (1) for a motor vehicle headlight, the optical device comprising: a primary optical element (100) having a main body (101) and having a plurality of optical waveguide bodies (110) projecting from the main body so as to form a desired light distribution from the light of light sources, which optical waveguide bodies in each case have a light-receiving surface (120) into which light from light sources can be fed, and also a light-emitting surface (130); a holder (200), on which the main body (101) of the primary optical element (100) is arranged on a front face of the holder (200), wherein the optical waveguide bodies (110) of the primary optical element penetrate the holder (200) through an opening region (201) of the holder; and a covering element (300) which is arranged on a rear face of the holder (200), facing away from the main body (101) of the primary optical element (100), wherein the covering element (300) has a number of openings (310) corresponding to the number of optical waveguides (10), and openings corresponding to the optical waveguides, which openings (310) are set up to receive the optical waveguide bodies (110) of the primary optical element (100) and to hold them in position, wherein the covering element (300) can be connected to the holder by means of at least one first engaging element arranged on the covering element (300), which first engaging element engages with at least one second engaging element arranged on the holder (200), wherein the at least one second engaging element is formed as a projection (420) projecting from the holder (200) with an engaging section (421), which has a height (h1) extending from the holder (200) and a width (b1), and an end section (422), which has a height (h2) and a width (b2), and wherein the at least one first engaging element is designed as a guide recess (410) in the covering element (300), wherein the guide recess (410) has a first region (411) and a second region (412) which is tapered in comparison to the first region, which second region (412) extends along a slip-on direction (X), and has a width (b3) extending transversely to the slip-on direction (X), wherein the projection (420) can be inserted into the first region (411) of the guide recess (410) and can be moved within the guide recess (410) in such a way that the second region (412) of the guide recess (410) can be slipped onto the engaging section (421) of the projection (420) by means of a movement of the covering element (300) in the slip-on direction (X).

2. The optical device according to claim 1, wherein the width (b1) of the engaging section (421) is less than the width (b2) of the end section (422).

3. The optical device according to claim 1, wherein the width (b3) of the second region (412) of the guide recess (410) corresponds at least to the width (b1) of the engaging section (421) of the projection (420).

4. The optical device according to claim 1, wherein the end section (422) of the projection (420) has a taper with respect to its height (h2) in the opposite direction to the slip-on direction (X).

5. The optical device according to claim 1, wherein the covering element (300) has a thickness (d1), wherein the height (h1) of the engaging section (421) of the projection (420) corresponds at least to the thickness (d1) of the covering element.

6. The optical device according to claim 1, wherein the holder (200) has at least one stop element (210), which stop element (210) is set up so as to limit the movement of the covering element (300) in the direction of the slip-on direction (X).

7. The optical device according to claim 1, wherein at least two first engaging elements (410) and at least two second engaging elements (420), corresponding to the first engaging elements (410), are provided.

8. The optical device according to claim 1, wherein at least one thickening element (423) is arranged on a face of the end section (422) of the projection (420) facing towards the holder (200), wherein the distance between the holder (200) and the at least one thickening element (423) is less than the height (h1) of the engaging section (421) of the projection (420).

9. The optical device according to claim 1, wherein at least one latching lug (220) is arranged on the holder (200), which latching lug is set up so as to latch in a fixing recess (320) corresponding to the latching lug (220), which fixing recess is provided on the covering element (300).

10. An illumination device comprising at least one optical device according to claim 1 with a number of light-emitting light sources (10) corresponding to the number of optical waveguide bodies (110), which light is configured to feed into the at least one optical device (1).

11. The illumination device according to claim 10, wherein exactly one, or at least one, light source is assigned to each optical waveguide body (110).

12. A light module comprising at least one illumination device according to claim 10.

13. A motor vehicle headlight comprising at least one light module according to claim 12.

14. The optical device according to claim 5, wherein the height (h1) of the engaging section (421) of the projection (420) corresponds at least to the thickness in the region of the guide recess (410) of the covering element (300).

15. The optical device according to claim 6, wherein the holder (200) comprises at least two stop elements (210).

16. The optical device according to claim 8, wherein at least two thickening elements (423) are arranged on the end section.

Description

(1) In what follows the invention is explained in more detail with the aid of exemplary drawings. Here:

(2) FIG. 1 shows an exploded view of an exemplary optical device with a holder and a covering element, wherein a projection projecting from the holder is set up so as to engage with a guide receptacle of the covering element, in order to connect the holder to the covering element,

(3) FIG. 2A shows a schematic detail of the guide receptacle and the projection in a plan view,

(4) FIG. 2B shows a cross-section of the illustration in FIG. 5A along the line of cut A-A,

(5) FIG. 2C shows a cross-section of the illustration in FIG. 5B along the line of cut B-B,

(6) FIG. 3 shows a perspective view of the optical device in FIG. 1 in an assembled state,

(7) FIG. 4 shows a rear view of the optical device in FIG. 3, and

(8) FIG. 5 shows a side view of the optical device in FIG. 4 with arranged light sources.

(9) FIG. 1 shows an exemplary optical device 1 in an exploded view, wherein a plurality of light sources 10 are arranged on a rear face of the device 1; these are set up so as to emit light beams in a main direction of radiation.

(10) The optical device 1 comprises a primary optical element 100 with a main body 101 and with a plurality of optical waveguide bodies 110 projecting from the main body 101, which optical waveguide bodies in FIG. 1 are arranged in the main direction of radiation of the light sources, and in each case have a light-receiving surface 120, into which the light beams of the light sources can be fed, together with a light-emitting surface 130.

(11) The device 1 furthermore comprises a holder 200, on which the main body 101 of the primary optical element 100 is arranged, that is to say, can be attached, on a front side of the holder 200, wherein the optical waveguide bodies 110 of the primary optical element penetrate the holder 200 through an opening region 210 of the holder 200.

(12) The device 1 furthermore comprises a covering element 300, which is arranged on a rear face of the holder 200, facing away from the main body 101 of the primary optical element 100, and has a thickness d1, preferably a constant thickness, wherein the covering element 300 has a number of openings 310 corresponding to the number of optical waveguide bodies 110, and openings 310 corresponding to the optical waveguide bodies 110, which openings 310 are set up so as to receive the optical waveguide bodies 110 of the primary optical element 100, and to hold them in position.

(13) In the example shown, the covering element 300 can be connected to the holder 200 by means of five first engaging elements 410 arranged on the covering element 300, which in each case are provided so as to engage with second engaging elements 420 arranged on the holder 200.

(14) In the example of embodiment shown in the figures, the second engaging elements 420 are in each case designed as a projection 420 projecting from the holder 200, and the first engaging elements 410 are in each case designed as a guide recess 410 in the covering element 300. FIGS. 2A, 2B and 2C in each case show details of the connectable engaging elements.

(15) The projections 420 also have, as can be seen more clearly in FIG. 2A for example, an engaging section 421 which has a height h1 extending from the holder 200, and a width b1, and an end section 422, which has a height h2, and a width b2, and a length 12. In the example of embodiment shown, the width b1 of the engaging section 421 is less than the width b2 of the end section 422.

(16) Each guide recess 410 has a first region 411 with a width b4 and a length 14, and a second region 412 that is tapered in comparison to the first region 411, which second region 412 extends along a slip-on direction X, and has a width b3 extending transversely to the slip-on direction X, as can be seen in FIG. 2A.

(17) A projection 420, that is to say, its end section 422 can in each case be passed through the first region 411 of a guide recess 410, so that the second region 412 of the guide recess 410 can be pushed onto the engaging section 421 of the projection 420 by means of a movement of the covering element 300 in the slip-on direction X, wherein the width b3 of the second region 412 of the guide recess 410 corresponds at least to the width b1 of the engaging section 421 of the projection 420, and wherein the height h1 of the engaging section 421 of the projection 420 corresponds at least to the thickness d1 of the covering element 300, preferably to the thickness in the region of the guide recess 410 of the covering element 300.

(18) Furthermore, the width b2 and the length 12 of the end section 422 of the projection 420 are respectively at least slightly less than the width b4 and the length 14 of the first region 411 of the guide recess 410.

(19) To this end FIG. 2A shows an engaging section 421 of a projection 420 partially slipped on into the second region 412 of the guide recess 410. FIG. 2B shows a cross-section from the illustration in FIG. 2A along the line of cut A-A, wherein it can be seen that the end section 422 of the projection 420 has a taper with respect to its height h2 in the opposite direction to the slip-on direction X.

(20) Furthermore, it can be seen in FIG. 2B and in FIG. 2C, respectively, that two thickening elements 423 are arranged on a side of the end section 422 of the projection 420 opposite to the covering element 300 in the slipped-on state of the covering element 300, wherein a distance h3 between the holder 200 and the at least one thickening element 423 is less than the height h1 of the engaging section 421 of the projection 420, as shown for example in FIG. 2C, which shows a section from the illustration in FIG. 2A along the line of cut B-B.

(21) FIG. 3 and FIG. 4 each show an assembled state of the optical device 1, in which the covering element 300 is connected to the holder 200, that is to say, is fully slipped onto the holder 200.

(22) For this purpose, the holder 200 in the example shown has two stop elements 210, which stop elements 210 are set up so as to limit the movement of the covering element 300 in the direction of the slip-on direction X. The stop elements 210 are arranged on the holder 200, for example, in such a way that an outer edge region, that is to say, an end edge of the covering element 300, rests or abuts against the stop elements 210 in a fully slipped-on state of the covering element 300.

(23) Furthermore, a latching lug 220 is arranged on the holder 200, which is set up so as to latch into a fixing recess 320 corresponding to the latching lug 220, which recess is provided on the covering element 300.

(24) FIG. 5 shows a side view of the assembled optical device 1, wherein the light sources 10 are also shown, as already cited in the introduction.

LIST OF REFERENCE SYMBOLS

(25) Optical device 1 Light sources 10 Primary optical element 100 Basic body 101 Optical waveguide body 110 Light-receiving surface 120 Light-emitting surface 130 Holder 200 Opening region 201 Stop element 210 Latching lug 220 Covering element 300 Opening 310 Fixing recess 320 Guide recess 410 First region 411 Second region 412 Projection 420 Engaging section 421 End section 422 Thickening element 423 Slip-on direction X