Electronic device
An electronic device includes a housing, first and second wiring substrates disposed to face each other, a fixing member that is made of an electrically conductive member and fixes the first and second wiring substrates to each other, and an external connection terminal provided in the housing. The fixing member has first and second fixing portions, and is interposed between the first and second wiring substrates. The fixing member is electrically conductive to a first electrically conductive portion provided in the first wiring substrate by fixing the first fixing portion to the first wiring substrate. The fixing member is electrically conductive to a second electrically conductive portion provided in the second wiring substrate by fixing the second fixing portion to the second wiring substrate. The external connection terminal is electrically conductive to the fixing member by electrically connecting the fixing member to the external connection terminal.
1. An electronic device comprising:
a first wiring substrate and a second wiring substrate each having a first main surface and a second main surface that are located on a front side and a rear side, respectively, the first wiring substrate and the second wiring substrate being spaced apart from each other in a facing direction in which the first main surface of the first wiring substrate faces the first main surface of the second wiring substrate;
a housing that accommodates the first wiring substrate and the second wiring substrate;
a fixing member including a first fixing portion fixed to the first wiring substrate and a second fixing portion fixed to the second wiring substrate, the fixing member being interposed between the first wiring substrate and the second wiring substrate to fix the first wiring substrate and the second wiring substrate to each other; and
an external connection terminal provided in the housing, wherein
the fixing member is formed of an electrically conductive member,
the first wiring substrate is provided with a first electrically conductive portion,
the second wiring substrate is provided with a second electrically conductive portion,
the fixing member is electrically conductive to the first electrically conductive portion by fixing the first fixing portion to the first wiring substrate,
the fixing member is electrically conductive to the second electrically conductive portion by fixing the second fixing portion to the second wiring substrate, and
the external connection terminal is electrically conductive to the fixing member by electrically connecting the fixing member to the external connection terminal,
wherein:
the housing is provided with a guide groove that receives the first wiring substrate to be inserted into the housing in a direction orthogonal to the facing direction,
the external connection terminal is provided at a position on a deepest side in an insertion direction in which the first wiring substrate is inserted into the housing, and
the first wiring substrate is inserted into the housing in the insertion direction to press the fixing member into contact with the external connection terminal.
2. The electronic device according to claim 1 , wherein the fixing member is formed of a metal plate-shaped member having a bent shape and including at least a plate-shaped base portion extending in the facing direction.
3. The electronic device according to claim 2 , wherein
the first fixing portion is formed of a first tongue-shaped portion standing upright from one end portion of the plate-shaped base portion to extend along the first main surface of the first wiring substrate, the one end portion of the plate-shaped base portion being located close to the first wiring substrate, and
the second fixing portion is formed of a second tongue-shaped portion standing upright from an other end portion of the plate-shaped base portion to extend along the first main surface of the second wiring substrate, the other end portion of the plate-shaped base portion being located close to the second wiring substrate.
4. The electronic device according to claim 2 , wherein the fixing member has a reinforcement portion having a tongue shape standing upright from an end portion of the plate-shaped base portion in a direction orthogonal to the facing direction and extending in the facing direction.
5. The electronic device according to claim 2 , wherein
the fixing member includes
a first positioning protrusion protruding in the facing direction with respect to the first fixing portion toward the first wiring substrate, and
a second positioning protrusion protruding in the facing direction with respect to the second fixing portion toward the second wiring substrate,
the first positioning protrusion is inserted into a first cut-out portion or a first recessed portion provided in the first wiring substrate to position the fixing member with respect to the first wiring substrate, and
the second positioning protrusion is inserted into a second cut-out portion or a second recessed portion provided in the second wiring substrate to position the fixing member with respect to the second wiring substrate.
6. The electronic device according to claim 2 , wherein the plate-shaped base portion is provided with a bent portion such that the plate-shaped base portion has a stepped surface extending in a direction intersecting with the facing direction.
7. The electronic device according to claim 2 , wherein
the first fixing portion and the first wiring substrate are fastened with a first fastening member to fix the first fixing portion to the first wiring substrate, and
the second fixing portion and the second wiring substrate are fastened with a second fastening member to fix the second fixing portion to the second wiring substrate.
8. The electronic device according to claim 1 , wherein a portion of the external connection terminal that is pressed into contact with the fixing member has a plate spring shape.