Wiper apparatus

Abstract

A wiper apparatus which removes foreign matters from a windshield by rotating by a pivot of a vehicle may include an arm piece connected to one end of an arm retainer to connect a wiper blade, and a coupling portion having a step portion formed to extend along a longitudinal direction so that an upper surface of the arm piece and an upper surface of the arm retainer form a same surface when coupled to correspond to a coupling hole formed in the arm retainer.

What is claimed is: 
     
         1 . A wiper apparatus which removes foreign matters from a windshield by rotating by a pivot of a vehicle, the wiper apparatus comprising:
 an arm piece connected to one end of an arm retainer to connect a wiper blade; and   a coupling portion having a step portion formed to extend along a longitudinal direction so that an upper surface of the arm piece and an upper surface of the arm retainer form a same surface when coupled to correspond to a coupling hole formed in the arm retainer.   
     
     
         2 . The wiper apparatus of  claim 1 , wherein a curling plate is formed to further extend in a direction of the arm piece side on a lower side of the coupling hole, thereby tightening and further firmly fixing a lower portion of the step portion through a compression process, in a state in which the coupling portion of the arm piece is inserted into the coupling hole of the arm retainer. 
     
     
         3 . The wiper apparatus of  claim 1 , wherein an auxiliary coupling hole is formed through a lower surface of the arm retainer adjacent to the coupling hole, and on a lower surface of the coupling portion, an auxiliary coupling protrusion coupled in response to the auxiliary coupling hole is formed to prevent the arm piece from being detached from the arm retainer. 
     
     
         4 . A wiper apparatus which removes foreign matters from a windshield by rotating by a pivot of a vehicle, the wiper apparatus comprising:
 as a lock-back device for converting a rotation direction depending on a magnitude of elastic restoring force and lock-back retention force based on an imaginary neutral shaft by applying the elastic restoring force to an arm retainer rotatably coupled to an arm head by a rotary shaft, an elastic hook having a hook, which connects a spring connected to the arm retainer side rivet to the arm head side rivet, hooked at an end so that an overall appearance including the spring is not exposed to a lower outside of the arm retainer.   
     
     
         5 . The wiper apparatus of  claim 4 , wherein the elastic hook is formed by flexibly bending a wire frame into a “U” shape so as to have an elastic force in a left-right direction, and at a tip of the arm head, a catching opening portion to which the elastic hook is detachably coupled by the forced catching is formed. 
     
     
         6 . The wiper apparatus of  claim 5 , wherein on an inside of an inlet side of the catching opening portion, a catching protrusion is further formed which temporarily restricts movement in a state in which the elastic hook is caught.