Patent ID: 7217153

Claim:
An electronic circuit apparatus to which a battery of a button type is to be inserted as a power source, the electronic circuit apparatus comprising: an electronic component to be powered by the battery; a positive terminal for contacting a positive electrode of the battery; a negative terminal for contacting a negative electrode of the battery; a circuit board for including a recess line portion, wherein the electronic component and both end portions of each of the positive terminal and the negative terminal are attached to a first surface of the circuit board; and a casing for including the circuit board by sealing, using resin, the circuit board in addition to the electronic component and the both end portions of each of the positive terminal and the negative terminal, wherein a second surface opposite to the first surface of the circuit board is included as a part of an outer surface of the casing, the casing further includes a battery containing space, which is surrounded by the recess line portion of the circuit board, for detachably containing the battery, a part of each of the positive terminal and the negative terminal appears within the battery containing space, and when the battery is not inserted, a distance between the positive terminal and the negative terminal in a direction of a thickness of the battery that is to be inserted is shorter than the thickness of the battery.