and the guide protrusion 35 formed in the bottom surface of the spool 23 can be avoided the other end portion of the movable iron piece 4 is provided with an opening 64 the hinge spring 44 passes through the opening 64 and comes in pressure contact with a corner portion of the to be attracted portion 63 the other end portion of the movable iron piece 4 has a small width and the card member 65 is integrally formed with an upper portion of the movable iron piece 4 which is disposed on the upper side of the opening 64 the card member 65 is made of a synthetic resin material on one surface of the card member 65 from which the upper end portion of the movable iron piece 4 which is integrally formed with the card member 65 is exposed first protruding portions 66 are formed at both sides of the upper end portion of the movable iron piece 4 respectively and a second protruding portion 67 is formed at an upper side of the first protruding portions 66 when the to be attracted portion 63 of the movable iron piece 4 is separated from the magnet pole portion 25 of the iron core 22 the elastic contact portion 46 of the hinge spring 44 collides with the second protruding portion 67 and after which the first protruding portion 66 comes into contact with the yoke 41 on the other surface of the card member 65 projection portions 68 extending in the vertical direction are formed at a predetermined interval in the widthwise direction.