substrate from occurring the use of the elastic body also has the advantage of controlling flow of molding resin in the resin case 2 to the above described resistor 6 side the resin case 2 comprising the substrate 1 is manufactured while being retained by a hoop material 30 shaped as shown in fig2 in other words the substrate 1 is joined with the resin case 2 while being retained by the soldered terminals 9 10 11 and dummy terminals 31 31 see fig3 and 5 needless to say the tie bars 31a and the dummy terminals 31 31 of the hoop material 30 are cut off eventually slits 9 39 10 39 are formed longitudinally along the lead terminals 9 and 10 to define divided forked tines 9a 9b 10a 10b in order to correspond to mounting types having both regular pitch of 2 5 mm and irregular pitch of 2 5 mm as will be explained later the resin case 2 is of cylindrical shape having an opening at its upper surface and is provided with a plurality of grooves 12a 12b 13a 13b and 14 from the side to the bottom surface thereof to house the above described terminals 9 10 11 as shown in fig3 through 6 the tubular portion 2a of the resin case 2 has an opening at its upper surface of an inside diameter large enough to rotatably house the rotor 3 at the inner periphery of the above described tubular portion is formed the ring shaped projection 2b which has a width large enough to allow for bending thereof.