Title:
LAMP HOUSE AND PROJECTING DEVICE FOR THE SAME
Document Type and Number:
Japanese Patent JP3667588
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a lamp house appropriately preventing a danger when a lamp bulb bursts.
SOLUTION: Ventilation ports 10, 20 for cooling a lamp bulb 40 provided in a casing 100 by ventilation is provided with an opening/closing plate 11 opening just inward of the casing 100 of a lamp house 1, a spring 14 to close the opening/closing plate 1, and a sensor 15 detecting an opening or closing condition of the opening/closing plate 11 attached on a suction port 10 side of the ventilation port. When the lamp house 1 is not mounted on a projecting device 2, the spring 14 closes the opening/closing plate 11 regardless of direction of the lamp house 1. When the lamp house 1 is mounted on the projecting device 2, the opening/closing plate 11 mounted on the suction port 10 side of the ventilation port is opened inward by receiving ventilated air from the projecting device 2 and an opening/closing plate 21 mounted on an exhaust port 20 side of the ventilation port is opened by inserting a duct 28 of the projecting device 2 into the lamp house 1 from the exhaust port 20.
Inventors:
Mikiya Shimizu
Application Number:
JP2000066184A
Publication Date:
July 06, 2005
Filing Date:
March 10, 2000
Export Citation:
Assignee:
NEC View Technology Co., Ltd.
International Classes:
G01N21/01; F21S2/00; F21V15/00; F21V25/12; F21V29/00; F21V29/02; G03B21/16; G03B21/20; F21Y101/00; (IPC1-7): F21V25/12; F21V15/00; F21V29/00; F21V29/02; G01N21/01; G03B21/16; G03B21/20
Domestic Patent References:
| JP4049403U | ||||
| JP3024532A | ||||
| JP9304835A | ||||
| JP10302522A | ||||
| JP9231806A | ||||
| JP5119400A | ||||
| JP2000292859A |
Attorney, Agent or Firm:
Masao Matsumoto