Vehicle wiper device
View Patent ↗An actuator for rotating an oscillating disk is mounted on a rear door. A pivot shaft provided with a lever is rotatably supported on a rear door glass. The lever is provided with a first elastic portion and second elastic portions. When the rear door glass is open, the first elastic member contacts the lever between the first restrictor and the lever. As a result, the rotation of the lever toward the outside of a first angle range by a first rotational force or less is restricted. The second elastic portion contacts the lever between the first restrictor and the lever even if the lever rotates toward the outside of a second angle range by a rotational force greater than the first rotational force.
1. A vehicle wiper device for wiping a surface of a hatch window, which is selectively opened and closed with respect to a vehicle body, the hatch window being selectively opened and closed by rotating with respect to the vehicle body, the device comprising:
an actuator mounted on the vehicle body, the actuator including an output shaft, which rotates in a reciprocating manner within a first angle range, the output shaft including a first coupling portion;
a support member mounted on the hatch window;
a pivot shaft supported by the support member to be rotatable with respect to the hatch window, the pivot shaft extending through the hatch window, the pivot shaft including a second coupling portion, the second coupling portion being drivingly coupled to the first coupling portion when the hatch window is closed, the output shaft being arranged coaxially with the pivot shaft, and the rotation of the output shaft within the first angle range rotating the second coupling portion within the first angle range;
a wiper arm supported by the pivot shaft, when the actuator is actuated while the hatch window is closed, the wiper arm oscillates to wipe the surface of the hatch window;
a restrictor for restricting the rotation of the second coupling portion, the restrictor restricting the rotation of the second coupling portion to the outside of the first angle range, and the restrictor restricting the rotation of the second coupling portion to the outside the first angle range at both circumferential ends of the first angle range;
a first elastic member-arranged at least on one of the restrictor and the second coupling portion, wherein, when the hatch window is open, the first elastic member contacts the second coupling portion between the restrictor and the second coupling portion, and as a result, even if a force less than or equal to a first rotation force acts on the second coupling portion, the second coupling portion is restricted from rotating to the outside of the first angle range; and
a second elastic member arranged at least on one of the restrictor and the second coupling portion, a second angle range greater than the first angle range is defined, wherein, when the hatch window is open, the second elastic member contacts the second coupling portion between the restrictor and the second coupling portion, so that the rotation of the second coupling portion to the outside of the second angle range is restricted, and the second elastic member restricts the rotation of the second coupling portion by a force greater than the first rotation force.
2. The vehicle wiper device according to claim 1 , wherein the first elastic member and the second elastic member are mounted on the second coupling portion.
3. The vehicle wiper device according to claim 1 , wherein the first elastic member has a greater elasticity than the second elastic member.
4. The vehicle wiper device according to claim 1 , wherein the first elastic member is integrally formed with the second elastic member.
5. The vehicle wiper device according to claim 3 , wherein the first elastic member has a hollow portion.
6. The vehicle wiper device according to claim 1 , wherein the first elastic member is formed to protrude toward the outside of the first angle range more than the second elastic member, and
wherein the first elastic member is formed such that when the second elastic member restricts the rotation of the second coupling portion, the first elastic member retracts toward the second elastic member.
7. The vehicle wiper device according to claim 6 , wherein the first elastic member has a hollow portion, and the hollow portion permits the first elastic member to deform such that the first elastic member retracts toward the second elastic member.
8. The vehicle wiper device according to claim 1 , wherein the first elastic member and the second elastic member are arranged along the axial direction of the pivot shaft.
9. The vehicle wiper device according to claim 1 , wherein one of a pair of ends of the first angle range corresponds to a stop position of the wiper arm, and
wherein the first elastic member is provided to restrict movement of the second coupling portion to the outside of the first angle range from the stop position.
10. The vehicle wiper device according to claim 1 , further comprising a position correcting portion,
wherein, in a state where the second coupling portion is located outside of the first angle range, when the output shaft rotates within the first angle range, the position correcting portion engages with one of the pivot shaft and the second coupling portion, thereby rotating the pivot shaft, and as a result, the second coupling portion is rotated into the first angle range, and the second coupling portion is coupled to the first coupling portion.
11. A vehicle wiper device for wiping a surface of a hatch window, which is selectively opened and closed with respect to a vehicle body, the hatch window being selectively opened and closed by rotating with respect to the vehicle body, the device comprising:
an actuator mounted on the vehicle body, the actuator including an output shaft, which rotates in a reciprocating manner within a first angle range, the output shaft including a first coupling portion;
a support member mounted on the hatch window;
a pivot shaft supported by the support member to be rotatable with respect to the hatch window, the pivot shaft extending through the hatch window, the pivot shaft including a second coupling portion, and the second coupling portion being drivingly coupled to the first coupling portion when the hatch window is closed, the output shaft being arranged coaxially with the pivot shaft, and the rotation of the output shaft within the first angle range rotating the second coupling portion within the first angle range;
a wiper arm supported by the pivot shaft, wherein, when the actuator is actuated while the hatch window is closed, the wiper arm oscillates to wipe the surface of the hatch window;
a restrictor for restricting the rotation of the second coupling portion, the restrictor restricting the rotation of the second coupling portion to the outside of the first angle range, and the restrictor restricting the rotation of the second coupling portion to the outside the first angle range at both circumferential ends of the first angle range;
a first elastic member arranged on the second coupling portion, wherein, when the hatch window is open, the first elastic member contacts the second coupling portion between the restrictor and the second coupling portion, and as a result, even if a force less than or equal to a first rotation force acts on the second coupling portion, the second coupling portion is restricted from rotating to the outside of the first angle range; and
a second elastic member arranged on the second coupling portion, a second angle range greater than the first angle range is defined, and wherein, when the hatch window is open, the second elastic member contacts the second coupling portion between the restrictor and the second coupling portion, so that the rotation of the second coupling portion to the outside of the second angle range is restricted, and the second elastic member restricts the rotation of the second coupling portion by a force greater than the first rotation force.