A jack (10) of the invention includes a holding body (9) having an insertion hole (15) into which an optical plug is able to be inserted, a window material (6) through which infrared radiation passing through the insertion hole (15) is transmitted, and a light reception unit (2) which detects infrared radiation of 6 m or more and 15 m or less transmitted through the window material (6). The window material (6) is provided in the holding body (9) so as to prevent water from intruding into the light reception unit (2), and arranged at a bottom of the insertion hole (15). Thereby, it is possible to give a waterproof property to an element which receives infrared radiation without limitation to design or aesthetic appearance of an electronic apparatus.

An earphone comprises a housing defining an audio opening; a speaker driver positioned within the housing; and a body temperature measuring module. The audio opening is configured to be positioned within or facing toward an ear canal of a wearer in a wearing position of the earphone. The speaker driver comprises a diaphragm facing toward the audio opening, defining an audio channel between the diaphragm and the opening. The body temperature measuring module is positioned within the audio channel, the and comprises a reflector, and a temperature sensor configured to receive an infrared light transmitted through the audio opening and reflected by the reflector.

A detection device of the present invention includes a temperature sensor configured to detect a temperature of an eardrum of a human, a supporting member including a columnar portion, to a distal end of which the temperature sensor is attached, a cover that covers the temperature sensor, and a heat shrinkable tube that adheres tightly to a peripheral wall of the cover and a side surface of the columnar portion in a state in which the heat shrinkable tube is shrunk after being heated.

A box-packed ear thermometer probe cover capable of preventing contact infection comprises a packing box, a plurality of stacked ear thermometer probe covers, and a cover holder, wherein an opening which can be opened and closed is formed in the top of the packing box, a long slot is formed in a side face of the packing box, ear thermometer probe covers are placed in the packing box, each ear thermometer probe cover comprises a container structure and a container space, a cover holder is disposed below the lowest ear thermometer probe cover and comprises a sealing wall, a top surface and a suspension structure suspended on the top surface, the ear thermometer probe covers are supported by the cover holder, and the sealing wall extends upwards to the opening and seals the long slot.

A temperature measuring device is configured for measuring a predetermined object by a temperature measurement module. The temperature measuring device includes a device main body having a hollow probe structure. An outer surface of the hollow probe structure has a plurality of recessed spaces recessed therefrom and a plurality of concave areas respectively formed in the recessed spaces. When the hollow probe structure of the device main body directly or indirectly contacts the predetermined object, the recessed spaces of the hollow probe structure are configured to reduce a heat conduction path between the hollow probe structure and the predetermined object. When the hollow probe structure of the device main body directly or indirectly contacts the predetermined object, the concave areas of the hollow probe structure do not contact the predetermined object, so as to reduce a heat exchange area between the hollow probe structure and the predetermined object.