Patent ID: 7503543
Filing Date: 2009-03-17
Classification: F16K,H01F,Y10T

Abstract:
1. A guide body to be provided in an electromagnetic valve device, wherein the electromagnetic valve device includes: a coil assembly including a coil disposed to surround the guide body, a stationary magnetic pole body that contacts a first end portion of the guide body, and a spring member, wherein a portion of lines of magnetic force formed by the coil passes through the stationary magnetic pole body; a plunger slidably disposed inside the guide body, and being driven by a magnetic force formed by the coil while resisting a biasing force of the spring member; and a valve body that is attached to the plunger on a side opposite from the stationary magnetic pole body; wherein the guide body slidably guides the plunger and the valve body in an open/close direction of the valve body along a guide face thereof; the guide body comprising: a first nonmagnetic section that is made of a nonmagnetic material, and supports the stationary magnetic pole body and a part of the plunger at least at which the stationary magnetic pole body and the plunger oppose each other; a second nonmagnetic section that is made of a nonmagnetic material, and supports at least the valve body, wherein the second nonmagnetic portion extends at least throughout a sliding range of the valve body; and a magnetic section that is made of a magnetic material, and is intermediate the first and second nonmagnetic sections so that a portion of the lines of magnetic force formed by the coil passes therethrough; wherein the guide face is formed so as to coaxially support the plunger and the valve body displaceable in the open/close direction.