Abstract: A storage battery terminal structure of the present invention includes: an annular recessed groove that is arranged on an upper end portion of a cylindrical male terminal; retaining projections that are engageable with the annular recessed groove; a housing that is an outer enclosing body of a female terminal; flexible arms, each flexible arm not only having a retaining projection on an upper end portion of an inner wall of a rigid sleeve of the housing surrounding the male terminal in order to release the corresponding retaining projection from the annular recessed groove but also being formed by a pair of slits formed from an upper end of the rigid sleeve so as to interpose the corresponding retaining projection therebetween; and a release button that is arranged on an upper end portion of the rigid sleeve so as to be vertically movable so that the flexible arms can be flexed sidewards and that has slopes on a lower surface thereof, the slopes facing sidewards.

Abstract: A storage battery terminal structure of the present invention includes: an annular recessed groove that is arranged on an upper end portion of a cylindrical male terminal; retaining projections that are engageable with the annular recessed groove; a housing that is an outer enclosing body of a female terminal; flexible arms, each flexible arm not only having a retaining projection on an upper end portion of an inner wall of a rigid sleeve of the housing surrounding the male terminal in order to release the corresponding retaining projection from the annular recessed groove but also being formed by a pair of slits formed from an upper end of the rigid sleeve so as to interpose the corresponding retaining projection therebetween; and a release button that is arranged on an upper end portion of the rigid sleeve so as to be vertically movable so that the flexible arms can be flexed sidewards and that has slopes on a lower surface thereof, the slopes facing sidewards.

Abstract: A storage battery terminal structure of the present invention includes: an annular recessed groove that is arranged on an upper end portion of a cylindrical male terminal; retaining projections that are engageable with the annular recessed groove; a housing that is an outer enclosing body of a female terminal; flexible arms, each flexible arm not only having a retaining projection on an upper end portion of an inner wall of a rigid sleeve of the housing surrounding the male terminal in order to release the corresponding retaining projection from the annular recessed groove but also being formed by a pair of slits formed from an upper end of the rigid sleeve so as to interpose the corresponding retaining projection therebetween; and a release button that is arranged on an upper end portion of the rigid sleeve so as to be vertically movable so that the flexible arms can be flexed sidewards and that has slopes on a lower surface thereof, the slopes facing sidewards.

Abstract: A drive guide system for an automotive vehicle indicates the remaining distance to a destination and the direction to the destination. In order to indicate the remaining distance and the direction in which to travel, travelling direction and travelling distance are detected. A direction sensor for detecting the terrestrial magnetic field is employed in the drive guide system. The direction sensor can be easily influenced by background noises in its surroundings. The background noise thus affects the detection of the direction of the terrestrial magnetism and thus causes errors in the calculation of the remaining distance and the direction to travel. Therefore, the variation of the background noise is sequentially monitored to detect the magnitude of the background noise affecting the detection of the direction, and when the variation exceeds acceptable limits, an error signal is produced.