Transformer assembling method, transformer, transformer-mounted substrate, power supply unit having transformer-mounted substrate, and recording apparatus including power supply unit

A transformer, comprising:

• a bobbin formed by uniting a winding member, which has a primary winding and secondary winding and a bore formed thereon and therein, with a primary winding fixture and secondary winding fixture adjoining the openings of said bore, and a ferromagnetic core having a core portion thereof inserted into said bore and including an enclosure for enclosing said windings;
• and
• a thermoplastic adhesive used to affix outer circumferences of said windings to said ferromagnetic core, and to affix said primary winding fixture and secondary winding fixture of said bobbin to said ferromagnetic core, wherein
• said thermoplastic adhesive is applied to valleys formed between said outer circumferences of said windings and said ferromagnetic core, and to areas linking outer surfaces of said primary winding fixture and secondary winding fixture and outer surfaces of said ferromagnetic core.

A transformer-mounted substrate, comprising:

• a substrate on which is mounted a transformer including a bobbin formed by uniting a winding member, which has a primary winding and secondary winding and a bore formed thereon and therein, with a primary winding fixture and secondary winding fixture adjoining the openings of said bore, and a ferromagnetic core having a core portion thereof inserted into said bore and including an enclosure for enclosing said windings;
• and
• a thermoplastic adhesive used to affix the outer circumferences of said windings to said ferromagnetic core, and to affix said primary winding fixture and secondary winding fixture of said bobbin to said ferromagnetic core, wherein
• said thermoplastic adhesive is applied to valleys formed between said outer circumferences of said windings and said ferromagnetic core, and to areas linking the outer surfaces of said primary winding fixture and secondary winding fixture and the outer surfaces of said ferromagnetic core.