Abstract: A Cd-free blue fluorescent quantum dot with a narrow fluorescence FWHM. The quantum dot does not contain cadmium and its fluorescence FWHM is 25 nm or less. The quantum dot is preferably a nanocrystal containing zinc and selenium or zinc and selenium and sulfur. Further, the quantum dot preferably has a core-shell structure in which the nanocrystal serves as a core and the surface of the core is coated with a shell.

Abstract: Provided is a direct acting mechanism of a tire curing device which can sufficiently perform positional control of a bladder extension height and a shaping height, etc., and is applicable to tires of different sizes. A hydraulically-driven central mechanism 1 as an example of a central mechanism of a tire curing device to which the present invention is applied includes a bag head 2 and a hydraulic cylinder 3. A cylinder tube 4 is formed to be thick-walled, and near the outer circumferential surface thereof, a sensor hole portion 7 is provided. The sensor hole portion 7 penetrates to the bottom surface side of the cylinder tube 4, and a linear sensor 8 with heat resistance and flexibility is inserted therein.

Abstract: Provided is a direct acting mechanism of a tire curing device which can sufficiently perform positional control of a bladder extension height and a shaping height, etc., and is applicable to tires of different sizes. A hydraulically-driven central mechanism 1 as an example of a central mechanism of a tire curing device to which the present invention is applied includes a bag head 2 and a hydraulic cylinder 3. A cylinder tube 4 is formed to be thick-walled, and near the outer circumferential surface thereof, a sensor hole portion 7 is provided. The sensor hole portion 7 penetrates to the bottom surface side of the cylinder tube 4, and a linear sensor 8 with heat resistance and flexibility is inserted therein.