Light module with a bulb shield and method for fastening a bulb shield in a position precisely

Patent metadata

Field	Value
Publication number	US-11879611-B2
Application number	US-202318323171-A
Country	US
Kind code	B2
Filing date	May 24, 2023
Priority date	May 25, 2022
Publication date	Jan 23, 2024
Grant date	Jan 23, 2024

Abstract

A light module is provided with a bulb shield. The light module includes a light generation unit for emitting light and an optic for shaping the light emitted by the light generation unit. The light generation unit includes a light-emitting surface. A bulb shield is arranged between the optic and the light generation unit for covering the light generation unit. The bulb shield includes a passage for the light emitted by the light-emitting surface. The light module includes a bearing structure for the bulb shield. The bulb shield is glued to the bearing structure by a first adhesive bond and the bulb shield is glued to the bearing structure by a second adhesive bond. A first adhesive used to produce the first adhesive bond and a second adhesive used to produce the second adhesive bond are different.

First claim

The invention claimed is:

1. A light module for an illumination device of a vehicle, the light module comprising:
a light generation unit for emitting light, the light generation unit including a light-emitting surface;
an optic for shaping the light emitted by the light generation unit; and
a bearing structure;
where a bulb shield is arranged between the optic and the light generation unit for covering the light generation unit, the bulb shield including a passage for the light emitted by the light-emitting surface,
where the bearing structure is for the bulb shield, where the bulb shield is glued to the bearing structure by a first adhesive bond and where the bulb shield is glued to the bearing structure by a second adhesive bond,
where a first adhesive used to produce the first adhesive bond and a second adhesive used to produce the second adhesive bond are different.

2. The light module in accordance with claim 1 , where the first adhesive of the first adhesive bond is a relative fast curing adhesive and where the second adhesive of the second adhesive bond is a relatively slow curing adhesive.

3. The light module in accordance with claim 1 , where the first adhesive of the first adhesive bond is a light curing adhesive and/or where the second adhesive of the second adhesive bond is a multi-component adhesive.

4. The light module in accordance with claim 1 , where the second adhesive bond overlaps the first adhesive bond on a side facing the optic.

5. The light module in accordance with claim 1 , where the bulb shield makes direct contact with a contact face of the bearing structure at a lower side of the bulb shield facing the light generation unit.

6. The light module in accordance with claim 1 , where the first adhesive bond is formed by several bonding spots and/or where the second adhesive bond includes one or several strip-shaped or linear bonds.

7. The light module in accordance with claim 1 , where the bearing structure includes one or several indentations to accommodate the first adhesive, where the respective indentation protrudes laterally in a line of sight onto a front side of the bulb shield facing the lighting unit opposite an outer edge of the bulb shield.

8. A method of precisely fastening a bulb shield in position in relation to a light-emitting surface of a light generation unit of a light module, the method comprising the steps of:
providing a bearing structure, where the light-emitting surface is fixed in position in relation to the bearing structure,
providing the bulb shield, where the bulb shield includes a passage for light emitted by the light-emitting surface,
introducing the bulb shield into the bearing structure,
positioning the passage of the bulb shield in relation to the light-emitting surface of the light generation unit,
producing a first adhesive bond between the bulb shield and the bearing structure by applying and curing a first adhesive,
producing a second adhesive bond between the bulb shield and the bearing structure by applying and curing a second adhesive,
where the curing of the first adhesive takes place prior to the curing of the second adhesive.

9. The method in accordance with claim 8 , where the application of the first adhesive and the application of the second adhesive is performed from a front side of the bulb shield facing away from the light generation unit.

10. The method in accordance with claim 8 , where the first adhesive of the first adhesive bond is a light-curing adhesive, where for curing the first adhesive the first adhesive is irradiated with suitable light from the front side of the bulb shield facing away from the light generation unit.

Assignees

• Hella Gmbh & Co Kgaa

Inventors

• Cramer Herbert
• Rohrberg Simone
• Schimon Christian
• Schwan Alexander
• Schwemin Dirk
• Sohrweide Frank
• Wieck Christian

Classifications

• F21S41/47 Primary

  Attachment thereof (achieving variable light distribution by movable screens F21S41/683) · CPC title

• F21S41/143 Primary

  the main emission direction of the LED being parallel to the optical axis of the illuminating device · CPC title

• F21S41/27

  Thick lenses · CPC title

• F21S41/43

  characterised by the shape thereof · CPC title

• F21S41/40 Primary

  characterised by screens, non-reflecting members, light-shielding members or fixed shades · CPC title