| 摘要 |
PURPOSE:To prevent deterioration in a magnetic characteristics due to a back gap from occurring, by joining the entire plane of the side planes of first and second cores confronting with a slider on one side of the slider, and holding and fixing a third core by pressurizing contact on the first and the second cores with an elastic member. CONSTITUTION:Coil bobbins 9 and 12 are inserted to the back cores 15 and 16 of a core assembly 1 as shown in arrow heads A and A', and are fitted in respective space S and S' between cores 2a and 2b, and between cores 4a and 4b. For this reason, the cores 2a and 4a are formed in L shapes so as to set the winding width of the coil bobbins 9 and 12 as wide as possible, and according to the above constitution, the back cores 15 and 16 are formed in a shape longer than ever. The shape and the size of the cross section of the slider 7 almost correspond to those of the core assembly 1 before the back cores 15 and 16 being joined, and the cross section is formed in an E shape, and clearance grooves 7c and 7d are formed piercing through in the thickness direction of the slider 7, and are confronted with the core assembly 1, and a joining plane 7a where the above components are joined is formed in the E shape corresponding to the side plane of confronting core assembly 1.
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