A fixing structure wherein impact transmitted to a housing is efficiently
transmitted to a circuit board and strain etc. generated at the housing
are not transmitted to the circuit board. The fixing structure includes a
circuit board mounting electronic devices, a housing storing the circuit
board in the inside, and a plurality of board mounting seats provided at
the housing for fixing the circuit board. Part of the plurality of board
mounting seats rigidly mount the circuit board to the housing. Due to
this, the impact is transmitted well to the electronic devices. The
remaining board mounting seats are formed so as to flexibly mount the
circuit board to the housing. Due to this, the strain generated at the
housing is no longer transmitted to the circuit board and destruction of
the circuit board can be prevented.