LENS FOR A LIGHTING FIXTURE

• US 20080084610A1
• Filed: 04/24/2007
• Published: 04/10/2008
• Est. Priority Date: 10/06/2006
• Status: Active Grant

• Current Assignee: Kojima Press Industry Company Limited
• Original Assignee: Kojima Press Industry Company Limited
• Inventors: Kitou, Yoshimasa
• Granted Patent: US 7,463,434 B2
• Time in Patent Office: Days
• US Class Current: 359/599
• CPC Class Codes: B60Q 3/74 for overall compartment lighting; for overall compartment lighting in combination with specific lighting, e.g. room lamps with reading lamps general lighting mounted on specific fittings B60Q3/20; general lighting for mass transit vehicles B60Q3/43
• CPC Class Codes: F21V 17/164 the parts being subjected to bending, e.g. snap joints
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21V 5/02 of prismatic shape F21V5/04 takes precedence

Abstract

A lens for lighting which enables a surface relief to be viewed continuously even near the portion where the lens is engaged, is provided.

Specifically, a lens for a lighting fixture equipped with an engaging portion that engages with a counter member, wherein either the counter member or the engaging portion 1 has an engaging pawl 8 that engages with the other member, the back surface 11 of the lens is formed with a surface relief to diffuse light, the engaging portion 1 is arranged on the back surface 11 of the lens, and an intermediate surface relief 5 is disposed between the back surface 11 of the lens and a top end surface 3 of the engaging portion 1, is provided.

Claims

1. A lens for a lighting fixture equipped with an engaging portion that engages with a counter member, wherein the counter member or the engaging portion has an engaging pawl that engages with the other member, the back surface of the lens is formed with a surface relief to diffuse light, the engaging portion is arranged on the back surface of the lens, and an intermediate surface relief is disposed between the back surface of the lens and top end surface of the engaging portion.

2. The lens for a lighting fixture according to claim 1, wherein at least portions of the top end surface of the engaging portion are formed with a surface relief.

3. The lens for a lighting fixture according to claim 1, wherein the intermediate surface is substantially parallel with the back surface of the lens.

4. The lens for a lighting fixture according to claim 2, wherein the intermediate surface is substantially parallel with the back surface of the lens.

5. The lens for a lighting fixture according to claim 1, wherein the thickness of the engaging portion is set to be substantially equal to a unit length of the surface relief on the back surface of the lens in the direction of thickness thereof.

6. The lens for a lighting fixture according to claim 2, wherein the thickness of the engaging portion is set to be substantially equal to a unit length of the surface relief on the back surface of the lens in the direction of thickness thereof.

7. The lens for a lighting fixture according to claim 3, wherein the thickness of the engaging portion is set to be substantially equal to a unit length of the surface relief on the back surface of the lens in the direction of thickness thereof.

8. The lens for a lighting fixture according to claim 4, wherein the thickness of the engaging portion is set to be substantially equal to a unit length of the surface relief on the back surface of the lens in the direction of thickness thereof.