Wiper system for sensor cleaning
A wiper system for sensor cleaning includes a frame, a window member coupled to the frame, a pivot shaft arranged on an outer side of the window member, a cantilever-shaped head fixed to the pivot shaft, a retainer rotatably coupled to the head within a certain angle, a blade holder rotatably coupled to an end portion of the retainer, a wiper blade detachably installed on the blade holder, and a pantograph arm including an end and another end, the end being rotatably coupled to the blade holder with respect to a second reference shaft spaced apart from the first reference shaft in parallel with the first reference shaft, and the other end being arranged at a position eccentric by a certain distance from the pivot shaft and rotatably coupled to the frame with respect to a third reference shaft parallel with the second reference shaft.
1 . A wiper system for sensor cleaning, comprising:
a frame comprising a sensor accommodation space with an open front;
a window member coupled to the frame to transparently close the front of the sensor accommodation space;
a pivot shaft arranged on an outer side of the window member, arranged in a direction perpendicular to the window member, and rotatably installed on the frame;
a cantilever-shaped head of which one end is fixed to the pivot shaft;
a retainer coupled to the other end of the head and installed to be rotatable with respect to a first hinge shaft within a certain angle with respect to the head;
a blade holder rotatably coupled to an end portion of the retainer with respect to a first reference shaft arranged in a direction perpendicular to the first hinge shaft in space;
a wiper blade detachably installed on the blade holder to clean a surface of the window member; and
a pantograph arm comprising an end and another end, the end being rotatably coupled to the blade holder with respect to a second reference shaft spaced apart from the first reference shaft in parallel with the first reference shaft, and the other end being arranged at a position eccentric by a certain distance from the pivot shaft and rotatably coupled to the frame with respect to a third reference shaft parallel with the second reference shaft,
wherein the first reference shaft is a structure formed integrally with the retainer,
the second reference shaft and the third reference shaft are structures formed integrally with the pantograph arm, and
the retainer forms a roof structure with an open side wall to prevent interference in a process of movement of the pantograph arm.
2 . The wiper system of claim 1 , wherein the retainer comprises a portion parallel with a direction of an upper edge of the window member to avoid blocking a front of the window member at a parking position.
3 . The wiper system claim 1 , wherein the pantograph arm is arranged along an inner side of the retainer.
4 . The wiper system of claim 1 , wherein the blade holder comprises:
a first coupling hole coupled to the first reference shaft; and
a second coupling hole coupled to the second reference shaft, and
the frame comprises a third coupling hole coupled to the third reference shaft.
5 . The wiper system of claim 4 , wherein the first coupling hole and the second coupling hole are arranged symmetrically with each other in a width direction of the wiper blade.
6 . The wiper system of claim 4 , further comprising:
a first bush coupled to the first coupling hole to reduce friction in rotation of the first reference shaft;
a second bush coupled to the second coupling hole to reduce friction in rotation of the second reference shaft; and
a third bush coupled to the third coupling hole to reduce friction in rotation of the third reference shaft.
7 . The wiper system of claim 1 , wherein the wiper blade comprises a coupling hook in a central portion thereof, and
the blade holder comprises a second hinge shaft to which the coupling hook is coupled.
8 . The wiper system of claim 7 , wherein the blade holder comprises a pair of guide rails guiding coupling of the coupling hook.