ELECTRICALLY DRIVEN BOOSTER AND STROKE DETECTION DEVICE

• Main Authors: ONOZUKA JUNJI, SHIMIZU SHINJI
• Format: Patent
• Language: English; Japanese
• Published: 02.08.2018
• Subjects: MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To provide an electrically driven booster made smaller without reducing a detection accuracy of a displacement amount of an input member.SOLUTION: An electrically driven booster includes a stroke detection device 7 for detecting a displacement amount of an input member accompanied with the operation of a brake pedal. The stroke detection device 7 includes: magnet members 172A, 172B, and 172C displaced together with the input member; a hole IC chip 187 for detecting magnetic flux density from the magnet members 172A, 172B, and 172C; and a compression coil springs 186A and 186B arranged on the front side and the rear side respectively along the displacement direction of the magnet members 172A, 172B, 172C, and expanding and contracting accompanied with the displacement of the input member. In this way, the electrically driven booster can be made smaller without reducing the detection accuracy of the displacement of the input member.SELECTED DRAWING: Figure 5 【課題】入力部材の移動量の検出精度を低下させることなく、小型化することができる電動倍力装置を提供する。【解決手段】電動倍力装置は、ブレーキペダルの操作に伴う入力部材の移動量を検出するストローク検出装置７を備え、該ストローク検出装置７は、入力部材と共に移動する磁石部材１７２Ａ、１７２Ｂ、１７２Ｃと、該磁石部材１７２Ａ、１７２Ｂ、１７２Ｃからの磁束密度を検出するホールＩＣチップ１８７と、磁石部材１７２Ａ、１７２Ｂ、１７２Ｃの移動方向に沿うその前側及び後側にそれぞれ配置されて、入力部材の移動に伴って伸縮変形する圧縮コイルバネ１８６Ａ、１８６Ｂと、を備えている。これにより、入力部材の移動量の検出精度を低下させることなく、電動倍力装置を小型化することができる。【選択図】図５