JPS63154372U

JPS63154372U -

Info

Publication number: JPS63154372U
Application number: JP4680187U
Authority: JP
Priority date: 1987-03-31
Filing date: 1987-03-31
Publication date: 1988-10-11

Description

[Brief explanation of drawings]

第１図はこの考案のワイパアーム圧制御装置の
一実施態様による構成を示す機能ブロツク図、第
２図はこの考案のワイパアーム圧制御装置の一実
施例によるワイパアーム１０の構造を示す垂直断
面図、第３図は第２図のアクチユエータ１５を駆
動するワイパアーム圧制御回路３０の回路構成を
示す説明図、第４図は第３図のワイパアーム圧制
御回路３０の作動状態を示す時間経過説明図であ
る。１……電動アクチユエータ、３……車速変換手
段、４……車速比較手段、５……電流検出手段、
６……電流比較手段、７……保持手段、８……駆
動手段、１０……ワイパアーム、１４……アーム
スプリング。 FIG. 1 is a functional block diagram showing the structure of an embodiment of the wiper arm pressure control device of this invention; FIG. 2 is a vertical sectional view showing the structure of a wiper arm 10 according to an embodiment of the wiper arm pressure control device of this invention; 3 is an explanatory diagram showing the circuit configuration of the wiper arm pressure control circuit 30 that drives the actuator 15 of FIG. 2, and FIG. 4 is an explanatory diagram showing the operating state of the wiper arm pressure control circuit 30 of FIG. 3 over time. 1... Electric actuator, 3... Vehicle speed conversion means, 4... Vehicle speed comparison means, 5... Current detection means,
6... Current comparison means, 7... Holding means, 8... Driving means, 10... Wiper arm, 14... Arm spring.

Claims

[Scope of utility model registration request]

In a wiper device that expands and contracts the arm spring of a wiper arm through the operation of an electric actuator to change the contact pressure of the wiper blade against the glass surface that wipes the glass surface, a voltage that corresponds to the actual vehicle speed is output from the vehicle speed converting means. A vehicle speed comparison means for comparing an output voltage and a set voltage, a current detection means for detecting an operating current of the electric actuator, a current comparison means for comparing an output current of the current detection means and a set current, and the vehicle speed comparison. holding means for stopping the drive of the electric actuator and maintaining that state in response to the output signal of the vehicle speed comparison means and the holding means; A wiper arm pressure control device comprising: a drive means for driving the wiper arm.