公开(公告)号：JPH0576132B2

公开(公告)日：1993-10-22

申请号：JP23016885

申请日：1985-10-16

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： NAKAMURA NAOYUKI ,  KANAYAMA SHUZO ,  OBARA NOBUYUKI

IPC: H01J61/32

公开(公告)号：JPS62264547A

公开(公告)日：1987-11-17

申请号：JP3612287

申请日：1987-02-19

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： NAKAMURA NAOYUKI ,  KANAYAMA SHUZO ,  OBARA NOBUYUKI

IPC: H01J61/32

Abstract: PURPOSE:To prevent breakage of the bridge section of a glass tube in mounting it to a lighting equipment by providing a base to one end of said glass tube while arraning a spacer in a clearance of said glass tube. CONSTITUTION:An electric discharge path is formed, through a hollow bridge 3, between electrodes 5, 5 of a fluorescent lamp. A spacer 7 is provided in the clearance of a glass tube 1 in mouting a fluorescent lamp like this to a lighting equipment. As result, the compression strength of the glass tube 1 is considerably improved with no unnatural force applied to a bridge section 3, thus enabling to prevent breakage of said bridge section.

公开(公告)号：JPS5822264B2

公开(公告)日：1983-05-07

申请号：JP5588876

申请日：1976-05-14

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： SANNOKI MASATSUGU ,  KANAYAMA SHUZO

IPC: B05B5/08 ,  B05B5/12 ,  B05D1/04 ,  B05D1/06 ,  H01J9/22

公开(公告)号：JPS6481159A

公开(公告)日：1989-03-27

申请号：JP23783987

申请日：1987-09-22

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： NAKAMURA NAOYUKI ,  KANAYAMA SHUZO

IPC: H01J61/32

Abstract: PURPOSE:To limit blacking caused by lighting to an electrode holding section and avoid lowering of the luminous flux retention rate by arranging the electrode holding section and a fluorescent bulb section separately in parallel to each other to form a discharge passage and bridge-connecting them near a closed end section. CONSTITUTION:A fluorescent bulb section 1 is independently made wherein both ends thereof are closed, a phosphor film 2 is formed on the inner wall surface thereof, and mercury and inert gas are contained therein. Electrode holding sections 3, 4 are also made independently with their one end closed while the other ends provided with caps 5, 6 near which are arranged an electrode 7 and a stem 8. The holding sections 3, 4 are respectively attached to both ends of the fluorescent bulb 1 and they are respectively connected via bridge parts 9, 10. Since the holding sections 3, 4 are arranged independently of the fluorescent bulb 1 in this way, blacking due to lighting is limited to the inside of the holding sections 3, 4, mercury vapor pressure becomes constant, and light emitting efficiency also becomes constant.

公开(公告)号：JPS6290844A

公开(公告)日：1987-04-25

申请号：JP23016885

申请日：1985-10-16

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： NAKAMURA NAOYUKI ,  KANAYAMA SHUZO ,  OBARA NOBUYUKI

IPC: H01J61/32

Abstract: PURPOSE:To improve the strength against the compression of the glass tube at the central portion so as to prevent the breakdown of the bridge portion when the lamp is attached to the illumination device by providing a spacer in the specified range between the inner end of the bridge of the glass tube and the upper end of the base of a discharge lamp. CONSTITUTION:The low pressure vapor discharge lamp of twin fluorescent lamp type is constructed with two glass tubes 1 coated with the film 2 of fluorescent material on the inside surface which are connected to each other with bridge 3 in the vicinity of the closed end. And on the other end portion of the glass tube 1 the base 6 provided with the electrode 4 and the stem 5 is planted. The spacer 7 is arranged in the specified range of the length L between the inner end of the bridge 3 and the base 6 of the discharge lamp. Thereby the strength against the compression at the central portion of the two glass tubes 1 can be improved so as to prevent the breakdown of the portion of the bridge 3 when the discharge tube is attached to the illumination device.