| 摘要 |
A structure of housing is to be arranged in such a way as not to involve a complication of a manufacturing process or damage to a sealing rubber, and moreover, not to involve a decrease in a mounting area of an electronic substrate, either. A transmitter includes: a casing; a sealing rubber which covers an inner surface of the casing; an electronic substrate fitted inside the sealing rubber; and an inner plate for preventing the electronic substrate from dropping off and housing a battery, wherein the inner plate, as well as having a structure which can take an aspect of a bent condition, in which it is bent with a thin-walled parting line portion as a border, or a straightened condition, in which it is in an approximately flush aspect, has one or more long holes, and has provided on one longitudinal edge of the long holes, arms of which proximal portions are swingably attached thereto, and furthermore, on the other longitudinal edge of the long holes, engagement portions which can be engaged with leading ends of the arms.
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