Wiper device
AssigneeAsmo Co., Ltd.
InventorToshio Shido
Life of this patent
Estimating the term…
Abstract
A wiper device has a pair of pivot holders each of which supports a pivot shaft and a pipe frame that connects the pivot holders to each other. When each pivot holder is fitted in an end of the pipe frame, the pipe frame is subjected to caulking to engage the pipe frame with recesses that are formed in the surfaces of the pivot holders. Each recess is shaped and located such that the open angle of the recess is constantly greater than zero and equal to or greater than the shaft angle of the corresponding pivot shaft, as viewed along any cross-sectional plane that includes a normal line corresponding to a maximum depth portion of the recess. As a result, the pivot holders are secured to the pipe frame easily and reliably, and the pivot holders are manufactured with a reduced cost.
Claims10
A wiper device comprising:
- a pair of pivot holders, wherein each pivot holder includes a fitting portion that extends along a fitting axis, and a plurality of recesses are formed in an outer side of each fitting portion;
- a pivot shaft, which is rotationally supported by each pivot holder, wherein a wiper arm is secured to each pivot shaft;
- and
- a frame, wherein the frame connects the pivot holders to each other, and a receiving portion in which each fitting portion is received is formed at each end of the frame;
- wherein the receiving portions are subjected to caulking with the fitting portions received in the corresponding receiving portions, such that a portion of each receiving portion that corresponds to each recess enters the recess, and the wiper device is characterized in that:
- each recess includes a curved bottom and a curved open end;
- and
- if, regarding each pivot holder, an angle between a normal line that corresponds to a maximum depth portion of each recess and a tangential line that corresponds to the open end of the recess is defined as an open angle while an angle between the axis of the corresponding pivot shaft and the normal line is defined as a shaft angle, the recess is shaped and located such that the open angle is constantly greater than zero and equal to or greater than the shaft angle, as viewed along any cross-sectional plane that includes the normal line.
A wiper device comprising:
- a pair of pivot holders, wherein each pivot holder includes a fitting portion that extends along a fitting axis, and a plurality of recesses are formed in an outer side of each fitting portion;
- a pivot shaft, which is rotationally supported by each pivot holder, wherein a wiper arm is secured to each pivot shaft;
- and
- a frame, wherein the frame connects the pivot holders to each other, and a receiving portion in which each fitting portion is received is formed at each end of the frame;
- wherein the receiving portions are subjected to caulking with the fitting portions received in the corresponding receiving portions, such that a portion of each receiving portion that corresponds to each recess enters the recess, and the wiper device is characterized in that:
- each recess includes a curved bottom;
- and
- if, regarding each pivot holder, an angle between a normal line that corresponds to a maximum depth portion of each recess and a certain portion of a wall that forms the recess is defined as an open angle while an angle between the axis of the corresponding pivot shaft and the normal line is defined as a shaft angle, the recess is shaped and located such that the open angle is constantly greater than zero and equal to or greater than the shaft angle, as viewed along any cross-sectional plane that includes the normal line.
Dependencies are inferred from the claim text.