Welded sensor device for preventing deformation from heat generation during the welding of the welded sensor device

A sensor device comprising:

• a casing provided with an opening;
• a cover member covering the opening;
• a gasket interposed between the cover member and a portion of the casing located at a peripheral edge of the opening, to surround the opening;
• and
• a fixing cover pressing the cover member toward the casing and thus holding the cover member to bring the gasket into close contact with the casing and the cover member, a plurality of welded portions bonding the casing and the fixing cover together being provided in a region outside the cover member such that the welded portions are distant from each other, wherein
• the casing includes a first external surface provided with the opening, a second external surface extending continuously from the first external surface to configure a first projected corner with the first external surface, and a third external surface located on a side opposite to that on which the second external surface is located as seen from the first external surface, and extending continuously from the first external surface to configure a second projected corner with the first external surface;
• the fixing cover includes a first plate-like portion which covers at least a portion of the first external surface, a second plate-like portion which covers at least a portion of the second external surface, and a third plate-like portion which covers at least a portion of the third external surface such that the fixing cover straddles the first external surface, the second external surface, and the third external surface;
• at least one of the plurality of welded portions is provided to bond the second external surface and the second plate-like portion together and at least another one of the plurality of welded portions is provided to bond the third external surface and the third plate-like portion together;
• the first external surface is provided with a loop groove in which the gasket is accommodated;
• and
• the plurality of welded portions are each provided at a position on a side of the casing inwardly of a bottom surface of the loop groove in a direction along a normal to an opening plane of the opening.

A sensor device comprising:

• a casing provided with an opening;
• a cover member covering the opening;
• a gasket interposed between the cover member and a portion of the casing located at a peripheral edge of the opening, to surround the opening;
• and
• a fixing cover pressing the cover member toward the casing and thus holding the cover member to bring the gasket into close contact with the casing and the cover member, a plurality of welded portions bonding the casing and the fixing cover together being provided in a region outside the cover member such that the welded portions are distant from each other, wherein
• the opening has a generally rectangular shape as seen in a direction along a normal to an opening plane of the opening;
• the gasket has a generally rectangular shape having a corner in a form of a curve as seen in the direction along the normal to the opening plane of the opening;
• and
• the plurality of welded portions are each provided at a position corresponding to the corner in the form of the curve.