| 主权项 |
1. A cleaning device for a lens of a headlight of a motor vehicle, comprising:
a tubular support to be connected to a washer fluid line, at least one spray nozzle arranged on the support, wherein the support comprises a first tube, the first tube being moveable from a basic position, in which the first tube surrounds a second tube, into an extended position, in which the first tube forms an extension of the second tube, wherein the second tube is connected to a connection for the washer fluid line and the first tube is connected to the spray nozzle, wherein a protective tube surrounds at least a portion of the first tube, and wherein the protective tube is connected immovably with respect to the connection for the washer fluid line a spring element for prestressing the first tube into the basic position, and a washer fluid pump for producing a designated pressure in the support and at the spray nozzle, wherein the second tube bears a sealing element which bears in a sealing manner against the inner wall of the first tube, and wherein the second tube has an end projecting into the first tube, the end of the second tube including (a) an opening and (b) a radial widened portion at which the sealing element is arranged, the first tube, second tube, and spring element defining a pressure-based extension system in which the first tube moves from the basic position to the extended position in response to fluid pressure caused by delivery of washer fluid into the first tube via the opening at the end of the second tube, wherein throughout a spraying operation of the cleaning device, including during movement of the first tube from the basic position to the extended position, the second tube remains in a stationary, fixed position relative to the protective tube. |
