Patent ID: 9164119
Filing Date: 2015-10-20
Classification: G01C,G01P

Abstract:
1. An angular velocity detection device comprising: an outer frame including a fixed portion and an outer beam portion connected to the fixed portion; a sensing part surrounded by the outer frame with a first slit therebetween; and a joint connecting the outer frame to the sensing part, wherein the sensing part includes: an inner beam portion having a hollow region inside, and being square-shaped when viewed from above; a flexible portion disposed in the hollow region of the inner beam portion, and connected to an inner edge of the inner beam portion; and a detector disposed in the flexible portion, wherein the first slit is formed to surround the sensing part excluding the joint, the flexible portion includes: a central beam portion connecting opposite sides of the inner beam portion together, and being in parallel with the outer beam portion; a first arm disposed inside the inner beam portion, and connected to the central beam portion; a second arm disposed inside the inner beam portion, connected to the central beam portion, disposed on a same side as the first arm with respect to the central beam portion, and formed line-symmetrically with respect to the first arm; a third arm disposed inside the inner beam portion, connected to the central beam portion, disposed on an opposite side of the first arm with respect to the central beam portion, and formed line-symmetrically with respect to the first arm; and a fourth arm disposed inside the inner beam portion, connected to the central beam portion, disposed on a same side as the third arm with respect to the central beam portion, and formed line-symmetrically with respect to the third arm, wherein the detector is one of detectors and the detectors are disposed on the first arm, the second arm, the third arm, and the fourth arm respectively, the detectors are disposed symmetrically with respect to the Y axis and the X axis, and the inner beam portion has a second slit formed centrally within the inner beam portion adjacent a corner of the inner beam portion.