| 摘要 |
PURPOSE:To obtain a transformer of a small size and high precision by providing one side of a coil bobbin with a square box holding an I-shaped core and having an outer surface curved in an arc, incorporating an E-shaped core into this coil bobbin, and adhesively correcting the abutting faces of the I-shaped core and the E-shaped core thereby for allowing the EI-shaped core to easily be constructed. CONSTITUTION:A square box 17 is provided on one collar 16 of a coil bobbin 12, and the outer surface of this square box 17 is formed so as to curve in an arc. When an I-shaped core 15 is slidably inserted into the square box 17, the I-shaped core 15 is put in pressure contact toward the collar 16 of the coil bobbin 12 due to the arc resilience of the square box 17. Then, an E-shaped core 14, applied with an adhesive agent 21 on the end 20 of the central magnetic leg 19 thereof, is inserted into the coil bobbin 12. Then, a pressure with appropriate strength is applied to the back portion 22 of the E-shaped core 14, and the pressure is removed after hardening of the adhesive agent 21. By this, a transformer can be achieved which possesses durability for temperature stress, excellent assembling ability, sufficient insulation between the terminal and the core, and excellent quality. |
