| 摘要 |
A first cylinder is orthogonally mounted relative to a vehicular bumper extending exteriorly thereof telescopingly receiving a second cylinder relative to the first cylinder in a coaxially aligned relationship, with the second cylinder extending beyond the first cylinder and arranged for retraction within the first cylinder. A first spring mounted between a rear terminal end of the second cylinder and the first cylinder maintains the second cylinder in an extended orientation. A first sensor mounted within the second cylinder sensitive to a lessening of light directed through the second cylinder is operative to engage an alarm light upon an object becoming in proximation to the forward distal end of the second cylinder. An alarm switch is mounted adjacent a rear terminal end of the first cylinder cooperative with an actuator rod mounted to the second cylinder to further provide actuation of the alarm light. The first light sensor is sensitive to light within a limited range, whereupon diminishing or additional reflected light effects closure of the switch to effect illumination of the alarm light. A second sensor is operative to effect illumination of a bulb within the second cylinder to effect illumination of the bulb during evening hours of lessened available light.
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