Abstract: A transformer capable of readily ensuring a predetermined insulation distance with no increase in the overall size of the transformer and further capable of reducing the number of constituent parts to achieve cost reduction. According to the present invention, the transformer includes a first bobbin having a wire winding section and a flange formed at an end of the wire winding section, a first coil wound around the wire winding section of the first bobbin, a second coil disposed coaxially with the first coil and adjacent to the flange, and a core disposed around the outer circumferences of the first and second coils to form a closed magnetic circuit, and a tubular protrusion that axially extends and surrounds the outer circumference of the second coil is formed along an outer circumferential portion of the flange of the first bobbin.

Abstract: A common mode choke coil includes a quadrilateral core 4; first and second core covers 2, 3 disposed opposite to each other on the upper and lower surfaces of the core 4 so as to cover the outer periphery of the core 4; and rectangular copper wires 8 wound on the opposite side portions of the core 4 of the first and second core covers 2, 3. The second core cover 3 is disposed on a component-mounting face. The first and second core covers 2, 3 include a pair of linear portions surrounding the corresponding opposite sides of the core 4 which linear portions constitute winding portions 5. The lower surface of the second core cover 3 has a pedestal portion 6 which protrudes more toward the component-mounting face than the winding portions 5, and extends out along the component-mounting face in a direction perpendicular to axis lines of the winding portions 5.

Abstract: A common mode choke coil includes a quadrilateral core 4; first and second core covers 2, 3 disposed opposite to each other on the upper and lower surfaces of the core 4 so as to cover the outer periphery of the core 4; and rectangular copper wires 8 wound on the opposite side portions of the core 4 of the first and second core covers 2, 3. The second core cover 3 is disposed on a component-mounting face. The first and second core covers 2, 3 include a pair of linear portions surrounding the corresponding opposite sides of the core 4 which linear portions constitute winding portions 5. The lower surface of the second core cover 3 has a pedestal portion 6 which protrudes more toward the component-mounting face than the winding portions 5, and extends out along the component-mounting face in a direction perpendicular to axis lines of the winding portions 5.

Abstract: Provided is a one-input and two-output type insulating transformer which can secure a desired insulation distance between the primary and secondary sides with a simple structure without causing an increase in the size of the product as a whole. The insulating transformer includes a first tube-shaped bobbin 1 around which a primary coil is wound, a second tube-shaped bobbin 2 in which a housing section 16 of the first bobbin 1 is formed between two winding sections 10 around each of which a secondary coil 9 is wound, and a core member 20 which forms a closed magnetic circuit by an inner core 7a inserted into hole sections 8 and 11 of the first and second bobbins 1 and 2, and by an outer core 7b arranged along the outer periphery of the second bobbin 2.

Abstract: The present invention provides a transformer including a first bobbin around which a primary coil is wound, a second bobbin which is disposed adjacent to the first bobbin and around which a secondary coil is wound, a core disposed across the first and second bobbins and forming a closed magnetic path. The core is divided into a first core positioned on the side where the first bobbin is present and a second core positioned on the side where the second bobbin is present, and an insulating member is interposed in a magnetically coupled portion between the first core and the second core, the insulating member including outer circumference sheaths that cover at least one of the first and second cores and a barrier interposed between the opposing surfaces of the first and second cores.

Abstract: [Problems] To realize a structure that is substantially highly reliable, that solves a problem of a wire break accompanied by an application of an external force to a terminal and at the same time solves a problem of a wire break caused by heat effects during dip soldering, without causing a strength reduction of the terminal, cost increase, and wire thinning. [Means for Solution] A winding component in which a terminal 12 is disposed in a protruding manner to a bobbin 14 provided with a winding portion, and a winding end is connected to the terminal, wherein a resin protrusion 40 is formed integral with the bobbin at a foot of the terminal, the resin protrusion is shaped with a part of its circumference notched so that a side surface of the terminal partially juts out, and a wire material that is wound around the resin protrusion a plurality of times comes into contact with the terminal and is to be connected by dip soldering.

Abstract: The present invention provides a transformer including a first bobbin (1) around which a primary coil (3) is wound, a second bobbin (2) which is disposed adjacent to the first bobbin (1) and around which a secondary coil (9) is wound, a core disposed across the first and second bobbins and forming a closed magnetic path. The core is divided into a first core (17) positioned on the side where the first bobbin is present and a second core (18) positioned on the side where the second bobbin is present, and an insulating member (14) is interposed in a magnetically coupled portion between the first core (17) and the second core (18), the insulating member (14) including outer circumference sheaths (16a) and (16b) that cover at least one of the first and second cores and a barrier (15) interposed between the opposing surfaces of the first and second cores.

Abstract: To realize a structure that is substantially highly reliable, that solves a problem of a wire break accompanied by an application of an external force to a terminal and at the same time solves a problem of a wire break caused by heat effects during dip soldering, without causing a strength reduction of the terminal, cost increase, and wire thinning. A winding component in which a terminal 12 is disposed in a protruding manner to a bobbin 14 provided with a winding portion, and a winding end is connected to the terminal, wherein a resin protrusion 40 is formed integral with the bobbin at a foot of the terminal, the resin protrusion is shaped with a part of its circumference notched so that a side surface of the terminal partially juts out, and a wire material that is wound around the resin protrusion a plurality of times comes into contact with the terminal and is to be connected by dip soldering.

Abstract: Variation in inductance and leakage inductance between the secondary windings is reduced thereby making lamp currents uniform and thus preventing the occurrence of uneven brightness. A two-output inverter transformer comprises a bobbin having a primary winding wound around the middle and secondary windings wound on both sides thereof and having a pole-like core inserted into its winding shaft. A rectangle frame-like core is placed to surround the primary and secondary windings such that the pole-like core is opposite the rectangle frame-like core with a gap sheet interposed at either end. Their sizes are set such that L2?L1>2 t, where L1 is the length of the rectangle frame-like core, L2 is the length of the pole-like core, and t is the thickness of the gap sheet, and they are so combined that the pole-like core protrudes evenly from the opposite ends of the rectangle frame-like core.

Abstract: Variation in inductance and leakage inductance between the secondary windings is reduced thereby making lamp currents uniform and thus preventing the occurrence of uneven brightness. A two-output inverter transformer comprises a bobbin having a primary winding wound around the middle and secondary windings wound on both sides thereof and having a pole-like core inserted into its winding shaft. A rectangle frame-like core is placed to surround the primary and secondary windings such that the pole-like core is opposite the rectangle frame-like core with a gap sheet interposed at either end. Their sizes are set such that L2?L1>2t, where L1 is the length of the rectangle frame-like core, L2 is the length of the pole-like core, and t is the thickness of the gap sheet, and they are so combined that the pole-like core protrudes evenly from the opposite ends of the rectangle frame-like core.

Abstract: A coil device, which has a coil composed of a core and a winding on the core, and a terminal having a base seat for holding the coil and terminal elements. The coil device has a flange on one side of the core with no flange being provided on the other side of the core. This allows molding by using a mold and can reduce a thickness of the flange of the core and thereby realize a reduction in the thickness of the coil device.

Abstract: There is disclosed a coil device, which has a coil composed of a core and a winding on the core, and a terminal having a base seat for holding the coil and terminal elements. The coil device has a flange on one side of the core with no flange being provided on the other side of the core. This allows molding by using a mold and can reduce a thickness of the flange of the core and realize reduction of thickness of the coil device.