LIGHT SOURCE FOR ILLUMINATION

• Main Authors: MATSUDA TSUGUHIRO, AIDA KAZUO, MATSUMOTO MASAHITO, KITAOKA SHINICHI, SUGAHARA KOSUKE
• Format: Patent
• Language: English; Japanese
• Published: 21.04.2016
• Subjects: BLASTING; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATINGELEMENTS; LIGHTING; MECHANICAL ENGINEERING; NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; NON-PORTABLE LIGHTING DEVICES; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

PROBLEM TO BE SOLVED: To provide a light source for illumination which can adjust length and which has high structural stability.SOLUTION: A bulb-shaped lamp 1 which includes a light emitting module 10 and a housing 50 has: a cylindrical first cylindrical body 60; a cylindrical second cylindrical body 70 which is inserted in the first cylindrical body 60 and which is arranged movable in an axial direction with respect to the first cylindrical body 60; and a first protrusion part 61a, a second protrusion part 61b and a third protrusion part 61c each of which is arranged at one of an inner peripheral surface 60a of the first cylindrical body 60 and an outer peripheral surface 70a of the second cylindrical body 70, and comes into contact with the other of the inner peripheral surface 60a and the outer peripheral surface 70a in the same position in the axial direction. A first angle θ1 which is an angle formed by the position of the first protrusion part and the position of the second protrusion part and a second angle θ2 which is an angle formed by the position of the first protrusion part and the position of the third protrusion part are equal to or greater than 120° and below 180° respectively.SELECTED DRAWING: Figure 2 【課題】長さの調節が可能であり、かつ、構造的な安定性の高い照明用光源を提供すること。【解決手段】発光モジュール１０と筐体５０とを備える電球形ランプ１であって、円筒形状の第一筒体６０と、第一筒体６０に挿入され、第一筒体６０に対して軸方向の移動が可能に配置された円筒形状の第二筒体７０と、各々が、第一筒体６０の内周面６０ａおよび第二筒体７０の外周面７０ａのいずれか一方に配置され、軸方向の同一位置において、内周面６０ａおよび外周面７０ａの他方に当接する第一突出部６１ａ、第二突出部６１ｂ、および第三突出部６１ｃと有し、第一突出部の位置と第二突出部の位置とのなす角である第一の角θ１、および、第一突出部の位置と第三突出部の位置とのなす角である第二の角θ２のそれぞれは、１２０°以上、かつ、１８０°未満である。【選択図】図２