Attachment for optical component and photoelectric sensor unit including the attachment

摘要

An attachment prevents foreign matter or water from entering a gap between an optical component and the attachment. An attachment (20) for an optical component is mountable onto a photoelectric sensor (10) including a light emitting window (12a) through which light passes. An accommodating unit (21) accommodates a cylindrical lens (23). Catch portions (22a, 22b) attach the accommodating unit (21) to the photoelectric sensor (10) so that the cylindrical lens (23) faces the light emitting window (12a). In the attachment (20) mounted on the photoelectric sensor (10), a sealant 80 seals an area where light passes in a space between a surface (12s) of the light emitting window (12a) and a surface (23a) of the cylindrical lens (23). A contact portion (81) comes in contact with the two surfaces (12s, 23a) in the attachment (20) mounted on the photoelectric sensor (10). A fixing portion (83) is spaced outwardly from the contact portion (81) and fixes the contact portion (81) to the accommodating unit (21). A connecting portion (85) connects the contact portion (81) to the fixing portion (83).