Bulb-form lamp and its manufacturing method

• US 20020195918A1
• Filed: 08/30/2002
• Published: 12/26/2002
• Est. Priority Date: 09/22/1999
• Status: Active Grant

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Shibata, Takenori, Matsumura, Takeshi, Matsuba, Tetsuo, Ishitsuka, Shinichiro
• Granted Patent: US 6,800,009 B2
• Time in Patent Office: Days
• US Class Current: 313/318.01
• CPC Class Codes: H01J 5/54 supported by a separate part, e.g. base
• CPC Class Codes: H01J 5/62 Connection of wires protruding from the vessel to connectors carried by the separate part
• CPC Class Codes: H01J 61/327 "Compact"-lamps, i.e. lamps having a folded discharge path
• CPC Class Codes: H01J 61/34 Double-wall vessels or containers
• CPC Class Codes: H01J 9/34 Joining base to vessel
• CPC Class Codes: H01K 1/46 supported by a separate part, e.g. base, cap

Abstract

To provide a bulb-form lamp including a few compartments, which can be easily fitted in a socket of a lighting equipment and reliably carry out electrical contact between a shell and the socket of the lighting equipment. The bulb-form lamp includes a shell surrounding one end of a casing, and the shell is molded integrally with one end of the casing to make contact with an outer surface of the casing leaving substantially no gap.

Claims

1. A bulb-form lamp comprising a shell surrounding one end of a casing, wherein said shell is molded integrally with one end of said casing to make contact with an outer surface of said casing leaving substantially no gap.

2. The bulb-form lamp according to claim 1, wherein said shell is formed at a side surface thereof with screw threads.

6. The bulb-form lamp according to claim 1, wherein said shell is provided with a through hole filled with part of said casing.

7. The bulb-form lamp according to claim 1, wherein said shell is provided at least at one end thereof with a recess filled with part of said casing.

8. The bulb-form lamp according to claim 1, wherein an eyelet is molded integrally with a tip of said casing to make contact with an outer surface of said casing leaving no gap.

3. The bulb-form lamp according to claim, wherein at least one end of said shell is embedded in said casing.

4. The bulb-form lamp according to claim 3, wherein a tip of an end of said shell is bent inwardly or outwardly from said shell.

5. The bulb-form lamp according to claim 3, wherein a cut-out portion is provided at a tip of an end of said shell embedded in said casing.

9. The bulb-form lamp manufacturing method, wherein a casing is molded by dies and at the same time a shell is molded integrally with one end of said casing leaving substantially no gap.

10. The bulb-form lamp manufacturing method according to claim 9, wherein screw threads are formed on a side surface of a blank member for forming said shell by applying pressure on liquid resinous material of the casing poured into a space formed by said dies.

11. The bulb-form lamp manufacturing method according to claim 10, wherein a circumferential groove is provided at an end of said blank member for forming said shell.

12. The bulb-form lamp manufacturing method according to claim 9, wherein the casing is molded by the dies and at the same time an eyelet is molded integrally with a tip of said casing leaving no gap.