Fluorescent bulb retaining spring

• US 7,506,993 B2
• Filed: 04/28/2005
• Issued: 03/24/2009
• Est. Priority Date: 05/04/2004
• Status: Expired due to Fees

• Current Assignee: Vossloh-Schwabe Deutschland GmbH (Panasonic Holdings Corporation)
• Original Assignee: Vossloh-Schwabe Deutschland GmbH (Panasonic Holdings Corporation)
• Inventors: Mews, Hans-Peter, Kain, Burkhard
• Primary Examiner(s): Husar; Stephen F
• Assistant Examiner(s): APENTENG, JESSICA MCMILLAN
• Application Number:
  US11/116,335
• Publication Number:
  US 20050248937A1
• Time in Patent Office: 1,426 Days
• Field of Search: 362/217, 362/260, 362/382, 362/614, 362/219, 362/396, 439/241, 248/50
• US Class Current: 362/217.01
• CPC Class Codes: F21V 19/009 the support means engaging the vessel of the source
• CPC Class Codes: F21Y 2103/00 Elongate light sources, e.g. fluorescent tubes

Abstract

A fluorescent bulb retaining spring (6) comprises a one piece, sheet-metal stamped and bent part, entirely and seamlessly comprised of one material. The retaining spring (6) can be produced especially simply from one rectangular piece of sheet metal of substantially uniform thickness, with all functional parts and functional regions created by cutting out spring tongues and bending them outwardly from the sheet. Connecting legs between a bulb retainer portion (9) and a fastening portion (8) form an annular region which is closed in force-locking fashion by a crimped connection (29, 31, 32), which can be produced in automated fashion as part of the stamping and bending operation.

Claims

1. A fluorescent bulb retaining spring suitable for supporting a tube portion of a fluorescent bulb that has a base at one end, comprising:

a spring body formed integrally of resilient metal and including;

a) a base member that comprises a fastening mechanism for attaching the retaining spring to a surface; and

b) a bulb retainer portion comprising two detent spring tongues and an associated abutment member for each detent spring tongue,

wherein each abutment member comprises an inclined portion carried by an upstanding leg connecting the base member to the bulb retainer portion,

wherein the two upstanding legs with their respective abutment members and the base member form a substantially annular configuration, and

wherein at least one of the upstanding legs is integrally connected on one side of the base member and a second upstanding leg is connected by a lock beaded connection on the diametrically opposite side of the base member.

2. A fluorescent bulb retaining spring according to claim 1, wherein the bulb retainer portion comprises a flat crosspiece, whose face is oriented substantially perpendicular to the base member and from which the two detent spring tongues extend toward the base member at acute angles to one another.

3. A fluorescent bulb retaining spring according to claim 2, wherein the two detent spring tongues are bent outwardly to opposing sides of the bulb retainer portion.

4. A fluorescent bulb retaining spring according to claim 2, wherein the two detent spring tongues are disposed between two legs that support the crosspiece.

5. A fluorescent bulb retaining spring according to claim 1, wherein the at least one detent spring tongue comprises on its end a portion bent at an angle that serves to support the fluorescent bulb.

6. A fluorescent bulb retaining spring according to claim 1, wherein the upstanding legs are connected to the base member on two diametrically opposite sides of the base member.

7. A fluorescent bulb retaining spring according to claim 1, wherein the base member has a flat plate-like portion.

8. A fluorescent bulb retaining spring according to claim 7, further comprising tabs that extend away from the plate-like portion and form detent protrusions for attaching the retaining spring to the surface.

9. A fluorescent bulb retaining spring according to claim 7, further comprising suspension hooks embodied on one side of the base member and a detent protrusion embodied on the diametrically opposite side of the base member, wherein the suspension hooks and the detent protrusion comprise a device for attaching the retaining spring to the surface.

10. A fluorescent bulb retaining spring according to claim 7, wherein at least one fastening opening is embodied on the base member.

11. A fluorescent bulb retaining spring according to claim 1, wherein the substantially annular configuration has a substantially polygonal shape.

12. A fluorescent bulb retaining spring according to claim 11, wherein the substantially polygonal shape comprises five sides.

13. A fluorescent bulb retaining spring according to claim 11, wherein the substantially polygonal shape is such as to provide an amount of lateral resilience sufficient to compensate for tolerances and to minimize lateral forces exerted by the retaining spring on the fluorescent bulb.

14. A fluorescent bulb retaining spring according to claim 11, wherein the substantially polygonal shape comprises two essentially parallel sides that permit the shape to act like a parallelogram.

15. A fluorescent bulb retaining spring according to claim 1, wherein the surface in which the fluorescent bulb retaining spring is attached is part of a lamp housing and the tube portion of the fluorescent bulb are two glass tubes of the fluorescent bulb.

16. A fluorescent bulb retaining spring according to claim 1, wherein the two upstanding legs are orientated substantially parallel with each other.

17. A fluorescent bulb retaining spring according to claim 1, wherein the two upstanding legs are orientated substantially perpendicular to a flat plate-like portion of the base member.

18. A fluorescent bulb retaining spring according to claim 1, wherein the bulb retainer portion comprises a flat crosspiece, whose face is oriented substantially parallel to the longitudinal direction of the two upstanding legs.

19. A method for forming a bulb retaining spring, suitable for supporting a tube portion of a fluorescent bulb that has a base at one end, comprising:

providing a generally rectangular sheet of metal, and

subjecting the metal sheet to a stamping and bending process to form said bulb retaining spring, wherein the formed bulb retaining spring comprises a spring body formed integrally of resilient metal and including (a) a base member that comprises a fastening mechanism for attaching the retaining spring to a surface; and

(b) a bulb retainer portion comprising two detent spring tongues and an associated abutment member for each detent spring tongue, wherein each abutment member comprises an inclined portion carried by an upstanding leg connecting the base member to the bulb retainer portion, and wherein the two upstanding legs with their respective abutment members and the base member form a substantially annular configuration.

20. A method for forming a bulb retaining spring according to claim 19, wherein the surface in which the fluorescent bulb retaining spring is attached is part of a lamp housing and the tube portion of the fluorescent bulb are two glass tubes of the fluorescent bulb.