Fluid handling – Systems – With flow control means for branched passages
Patent
1997-10-16
1999-03-30
Lee, Kevin
Fluid handling
Systems
With flow control means for branched passages
13759617, 3031192, F16K 3102
Patent
active
058876243
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an electromagnetic valve device comprising a plurality of valve operating units, each including valve components such as a stationary core, a movable core, a valve body and a return spring, which are disposed in a valve housing having a guide cylinder connected at its base end to a housing body fitted to and secured to a base member; a plurality of bobbins each having a center bore through which each of the guide cylinders are passed; a plurality of coils each wound around each of the bobbins; a plurality of magnetic path defining frames each of which surrounds each of the coils to magnetically couple a tip end of the guide cylinder and the housing body to each other.
2. Description of the Related Art
The above described electromagnetic valve device is already known from Japanese Patent Application Laid-open No. 7-47938, for example.
In such a known electromagnetic valve device, the plurality of bobbins around which the coils are wound and the plurality of the magnetic path defining frames are assembled as a unit so as to be common to a plurality of valve operating units mounted to a base member. And in a state where each of the valve operating units is mounted to the base member, the common unit is mounted to the base member to simplify the assembling operation. However, there is a tolerance in relative position between the plurality of valve operating units mounted to the base member and each of the bobbins and magnetic path defining frames in the common unit. Therefore, in the electromagnetic valve device in which each of the magnetic path defining frames is positioned at a constant location with respect to each of the bobbins, as in the above described publication, it may be difficult, in some cases, to smoothly insert the guide cylinder of the valve operating unit into each of the bobbins due to the tolerance in relative position. Further, if an inner diameter of the center bore of the bobbins is set greater than an outer diameter of the guide cylinder so as to absorb the tolerance in relative position, a relatively large gap is produced between the magnetic defining frame and the guide cylinder and thus, it may be difficult, in some cases, to form a magnetic path by the magnetic path defining frame.
SUMMARY OF THE INVENTION
The present invention has been accomplished in view of the above circumstances, and it is an object of the invention to provide a electromagnetic valve device in which the magnetic path can reliably be formed by the magnetic path defining frame, and each of the bobbins around which the coil is wound and the magnetic path defining frame can easily be assembled to each of the valve operating units.
To achieve the above object, the present invention provides an electromagnetic valve device comprising: a plurality of valve operating units, each including valve components such as a stationary core, a movable core, a valve body and a return spring, which are disposed in a valve housing having a guide cylinder connected at base end thereof to a housing body fitted to and secured to a base member; a plurality of bobbins each having a center bore through which each of the guide cylinder is passed; a plurality of coils each wound around each of the bobbins; a plurality of magnetic path defining frames each of which surrounds each of the coils to magnetically couples a tip end of the guide cylinder and the housing body to each other; wherein the plurality of bobbins having the coils wound therearound are buried in a mold section made of a synthetic resin to form a coil unit, the coil unit being mounted to the base member, and each of the magnetic path defining frames being movably mounted in a cylindrical coil correspondence portion formed in the mold section to cover each of the bobbins and each of the coils wound around the bobbins; and the magnetic path defining frames each provided at one end thereof with a fitting bore into which the tip end of the guide cylinder is fitted, the other end of each o
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patent: 5449019 (1995-09-01), Hara
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patent: 5482362 (1996-01-01), Robinson
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patent: 5611372 (1997-03-01), Bauer et al.
Fujimoto Akira
Kurita Tsutomu
Shirase Takaomi
Tamai Naotoshi
Taniguchi Takeshi
Kabushiki Kaisha Honda Lock
Lee Kevin
Nissin Kogyo Co. Ltd.
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