Imaging device with protected board
An imaging device includes a camera module which includes a lens, a lens holder, and an image sensor. The imaging device also includes a circuit board, a case, and a cover which defines an inner chamber along with the case in which the lens, the holder, and the image sensor are disposed. The case includes an opening-defining portion which defines an opening through which the holder is inserted. The opening-defining portion includes a first wall, a second wall, and a shield. The first wall is located between the holder and the board. The second wall is arranged on an opposite side of the holder to the first wall. The shield extends from the first wall between the holder and the board in the inner chamber defined by the case and the cover. The shield works to block adhesion of foreign matter to the circuit board.
1 . An imaging device comprising:
a camera module which includes a lens, a holder in which the lens is disposed, and an image sensor which captures an image using light having passed through the lens and outputs the captured image in a form of an electrical signal;
a board which derives the electrical signal from the image sensor;
a case; and
a cover which defines an inner chamber along with the case in which the lens, the holder, the image sensor, and the board are disposed, wherein
the case includes an opening-defining portion which defines an opening through which the holder is inserted,
the opening-defining portion includes a first wall, a second wall, and a shield, the first wall being located between the holder and the board, the second wall being arranged on an opposite side of the holder to the first wall, the shield extending from the first wall in a first direction and being located between the holder and the board in the inner chamber defined by the case and the cover.
2 . The imaging device as set forth in claim 1 , wherein the shield is formed integrally with the first wall.
3 . The imaging device as set forth in claim 1 , wherein the first direction is a direction in which an optical axis (OL) of the lens extends.
4 . The imaging device as set forth in claim 1 , wherein the shield is oriented to slant relative to an optical axis (OL) of the lens to have a first distance (L 1 ) smaller than a second distance (L 2 ), the first distance being a distance between an end of the shield and the holder in a direction traversing the optical axis, the end of the shield facing in the first direction, the second distance being a distance between the holder and a boundary of the shield and the first wall in the direction traversing the optical axis.
5 . The imaging device as set forth in claim 1 , wherein the second wall includes a holder-facing surface and an outer surface, the holder-facing surface being oriented to face the holder in a direction traversing an optical axis (OL) of the lens, the outer surface extending to intersect the holder-facing surface, connecting with the holder-facing surface, and facing outside the case,
the shield has an end which faces in the first direction and is located away from the outer surface in the first direction.
6 . The imaging device as set forth in claim 1 , wherein an end of the shield which faces in the first direction is located away from an end of the board in the first direction.
7 . The imaging device as set forth in claim 1 , wherein the board is defined as a first board,
the camera module also includes a second board on which the image sensor is mounted, and further comprising,
a connecting member which connects with the first board and the second board, and wherein
the holder includes holder ends which face in a second direction extending perpendicular both to a direction in which an optical axis (OL) of the lens extends and to a direction oriented from the first wall to the second wall,
a joint of the connecting member and the second board is located away from the shield in the first direction,
the connecting member includes connecting member ends which face in the second direction,
the connecting member ends are located more inward than the holder ends in the second direction,
the opening-defining portion includes protruding portions which extends in a direction from the shield toward the holder,
each of the protruding portions is located between one of the holder ends and one of the connecting member ends.
8 . The imaging device as set forth in claim 1 , wherein the board is defined as a first board,
the camera module also includes a second board on which the image sensor is mounted, and further comprising,
a connecting member which connects with the first board and the second board, and wherein
a joint of the connecting member and the second board is located away from the shield in the first direction,
the shield is oriented to slant in a second direction perpendicular both to a direction in which an optical axis (OL) of the lens extends and to a direction oriented from the first wall to ward the second wall.
9 . The imaging device as set forth in claim 1 , wherein the second wall is located away from the first wall in the first direction.