| 摘要 |
In an electronic device, a circuit substrate is provided with at least one electronic circuit, and a case accommodates the circuit substrate. The case has a pair of groove portions and a side opening portion. The groove portions are provided, such that edge portions of the circuit substrate are slidable and inserted into the groove portions from the side opening portion. A box-shaped cover is disposed to close a bottom opening portion of the case. The cover includes a pair of side walls having top end portions, and a plurality of protrusion portions projecting from the top end portions of the side walls. The protrusion portions are inserted into a space between the edge portions of the circuit substrate and the groove portions, at a bottom side of the circuit substrate, to fix the circuit substrate.
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