Abstract: A solenoid valve comprises a plunger provided in a case so as to be magnetically moved, a coil provided in the case for generating a magnetic force, a yoke provided in the case for transmitting the magnetic force to the plunger, a sleeve, and a valve provided in the sleeve so as to be slidable within the sleeve in accordance with a movement of the plunger in order to switch a flow path, wherein the yoke and the sleeve are formed so as to be fitted together, and after the sleeve is fitted to the yoke, the sleeve is fixed from outside of a portion at which the sleeve and either one of the case or the yoke are overlapped each other.

Abstract: A solenoid valve comprises a sleeve having ports and through hole, a spool slidably located in the through hole of the sleeve so that an intercommunication between the ports are changed, one end of the spool being faced with outside of the sleeve, a solenoid means for driving the spool, a case fixed to the sleeve to form an inner space for accommodating the solenoid means, and a diaphragm for sealing the inner space from the through hole, wherein a passage is formed in the spool so that the inner space is fluidlically communicated with an outside of the sleeve.

Abstract: An electromagnetic valve comprises a coil wound on a bobbin made of resin, a case accommodating the coil inside thereof and made of magnetic material, a yoke made of magnetic material and forming a magnetic circuit together with the case, a plunger made of magnetic material and driven by a magnetic attracting force generated at the energization of the coil, a connector formed separately from the bobbin and the case and connected to one end of the case, a first terminal passed into the connector, a second terminal electrically connected to an end of the coil and a urging member made of electric conductor and contacted with the first and second terminals.

Abstract: An electromagnetic valve comprises a coil wound on a bobbin made of resin, a case accommodating the coil inside thereof and made of magnetic material, a yoke made of magnetic material and forming a magnetic circuit together with the case, a plunger made of magnetic material and driven by a magnetic attracting force generated at the energization of the coil, a connector formed separately from the bobbin and the case and connected to one end of the case, a first terminal passed into the connector, a second terminal electrically connected to an end of the coil and a urging member made of electric conductor and contacted with the first and second terminals.

Abstract: An electromagnet includes a cylindrically shaped electric coil made of magnetic material and wound around a bobbin made of resin material and made of magnetic material, a cylindrically shaped case made of magnetic material and housing the electric coil, a yoke made of magnetic material for forming a magnetic circuit in cooperation with the case, with both longitudinal ends of the yoke facing the bobbin, and a plunger made of magnetic material and disposed in the inner peripheral of the yoke for moving by electromagnetic force in the longitudinal direction when current is supplied to the electric coil. The bobbin and the yoke are integrated with each other by resin forming, with the outer peripheral portion of the yoke facing the inner peripheral portion of the bobbin being subjected to grooved treatment in the longitudinal direction to form at least one groove and/or knurling treatment to form a knurled outer peripheral portion of the yoke.

Abstract: A spool valve type electromagnetic valve constructed to facilitate production at reduced cost includes a linear solenoid having a spool and a plunger that are coaxially aligned. The linear solenoid also has a rear yoke which is configured by a resin-made bobbin around which a coil is wound and a plunger movably fitted in the resin made bobbin. The linear solenoid also includes a front yoke positioned in the bobbin in coaxial alignment with both the rear yoke and a connecting end of a valve body of the valve. The front yoke, the rear yoke and the resin-made bobbin form an integrated structure produced through insert molding. An alignment facilitating portion is provided between the front yoke and the valve body.