Device for converting rotational motion into reciprocating angular motion and wiper system including the same

Patent metadata

Field	Value
Publication number	US-11091123-B2
Application number	US-202016844891-A
Country	US
Kind code	B2
Filing date	Apr 9, 2020
Priority date	Jun 20, 2019
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

A device for converting a rotational motion into a reciprocating angular motion and a wiper system including the same include a fixed body fixed to a certain object; a rotating body rotatably connected to the fixed body and rotating around a fixed axis; and a torsion spring coupled to the fixed axis and having an end portion and an opposite end portion, the end portion being held by the fixed body and the opposite end portion being held by the rotating body.

First claim

What is claimed is:

1. A device for converting a rotational motion into a reciprocating angular motion, the device comprising:
a fixed body fixed to a certain object;
a rotating body rotatably connected to the fixed body and rotating around a fixed axis; and

a torsion spring coupled to the fixed axis and having an end portion and an opposite end portion, the end portion being held by the fixed body and the opposite end portion being held by the rotating body,
wherein a pair of rotating wings are symmetrically arranged with respect to a center of the rotating body and fixed to the rotating body;
the fixed body includes a pair of stoppers limiting a rotation range of the rotating body, the pair of stoppers being arranged in a certain angle range around the fixed axis; and
the torsion spring applies an elastic restoring force such that one of the pair of rotating wings is in contact with one of the pair of stoppers when an external force is not applied to the rotating body.

2. A wiper system including the device of claim 1 , the wiper system comprising a wiper blade coupled to the rotating body.

3. The wiper system of claim 2 , wherein the wiper blade is mounted on each of the pair of rotating wings.

4. The wiper system of claim 3 , further comprising a direct current motor rotating the rotating body,
wherein the direct current motor is controlled to be powered off after the direct current motor rotates the rotating body in one direction by an angle between the pair of stoppers.

5. The wiper system of claim 4 , wherein the direct current motor is adhesively fixed to a surface of vehicle glass;
a first magnet wheel is provided at an end of an output shaft of the direct current motor not to penetrate the vehicle glass and includes a permanent magnet;
the fixed body is adhesively fixed to an opposite surface of the vehicle glass;
the rotating body is between the vehicle glass and the fixed body; and
the rotating body includes a second magnet wheel configured to produce an attractive force with respect to the first magnet wheel.

6. The wiper system of claim 3 , wherein the fixed body has an open structure in a range in which the pair of rotating wings rotate.

Assignees

• Dy Auto Corp

Inventors

• Hong Sung Jin
• Cho Sung Ho

Classifications

• B60S1/566

  including wiping devices (B60S1/563, B60S1/583 take precedence) · CPC title

• B60S2001/3837

  with more than one wiping edge or lip · CPC title

• B60S1/0848

  Cleaning devices for cameras on vehicle · CPC title

• H02K33/02

  with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs · CPC title

• B60S1/40 Primary

  Connections between blades and arms · CPC title