Wiper arm, wiper, and vehicle

A wiper arm for vehicles, comprising:

• a wiper arm seat;
• a wiper arm end piece configured to secure a wiper blade;
• an arm portion arranged between the wiper arm seat and the wiper arm end piece, wherein the arm portion rotates relative to the wiper arm seat;
• a conduit and a spray nozzle, where the conduit is guided along the wiper arm and the spray nozzle being arranged at an end of the conduit;
• the arm portion is provided with a cover plate, and the spray nozzle held at the cover plate, wherein said spray nozzle is provided with an opening;
• the cover plate having a raised first wall, a local area at a top of the raised first wall having a protrusion, and a width of the protrusion is greater than a width of the opening, wherein the raised first wall is configured to be inserted into the opening;
• wherein the protrusion is configured to extend through and out of the opening;
• wherein the spray nozzle is also provided with a groove, where a portion of a side wall of said groove is in the form of a hook;
• and
• the hook being configured to snap into a corresponding orifice of the arm portion.

A wiper arm for vehicles, comprising:

• a wiper arm seat for connecting to a driver;
• a wiper arm end piece for holding a wiper blade and an arm portion arranged between the wiper arm seat and the wiper arm end piece, wherein the arm portion is fixedly connected to the wiper arm end piece and rotates relative to the wiper arm seat;
• at least one spray unit that is provided with a conduit and a spray nozzle, the conduit being guided along the wiper arm and the spray nozzle being arranged at one end of the conduit, the arm portion is provided with a cover plate, and the spray nozzle held at the cover plate;
• wherein the cover plate is provided with a raised first wall, wherein the spray nozzle is provided with an opening;
• wherein the spray nozzle is also provided with a groove, where a portion of a side wall of the groove is in the form of a hook;
• wherein the cover plate is provided with a raised second wall, the spray nozzle is fixedly held at the second wall;
• a width of the raised second wall corresponds to that of the opening;
• a plurality of steps and elastic clips are set in pairs on two longitudinal ends of the raised second wall;
• the raised second wall configured to be inserted into the opening;
• wherein the distance between vertical planes of the plurality of steps correspond to a length of the opening;
• one side of the spray nozzle surrounding an area of the opening leans against a horizontal plane of the plurality of steps, while the plurality of clips lean against a side of the spray nozzle opposing the area of the opening.