Bobbin for coil, coil winding, and coil component

A coil component comprising an electrically insulating coil bobbin having a cylindrical portion, and an electrically conductive coil winding wound around the cylindrical portion,

• wherein the coil winding is comprised of a plurality of coil members of an end-defined ring shape coupled so as to be continuous in a predetermined winding direction,
• wherein the cylindrical portion is inserted in openings of the coil members from one end of the cylindrical portion and along a direction of a center axis of the cylindrical portion,
• wherein an insulating portion protruding outwardly relative to the center axis is integrally provided at the other end of the cylindrical portion, and a bobbin-side engagement portion for engagement between the coil bobbin and the coil winding is formed on a face of the insulating portion opposed to the coil member, the bobbin-side engagement portion being a first projection,
• wherein a winding-side engagement portion is provided on the coil member into which the cylindrical portion is first to be inserted, the winding-side engagement portion comprising a second projection and a depression, the second projection being provided on a face to be opposed to the insulating portion, the depression being provided on a reverse face of the face to be opposed to the insulating portion, the depression being engageable with the bobbin-side engagement portion,
• wherein a third projection of the coil bobbin comes into contact with the second projection of the winding-side engagement portion before the depression of the winding-side engagement portion engages with the bobbin-side engagement portion when the third projection is inserted into a slit and the coil bobbin is rotated in a second direction opposite to a first direction,
• wherein the third projection protruding outwardly relative to the center axis is provided on an outer peripheral surface between the one end and the other end of the cylindrical portion,
• wherein the coil member into which the cylindrical portion is first to be inserted, has a projection insertion portion extending from an inner periphery to an outer periphery thereof, the projection insertion portion being the slit between one end and the other end of the coil member,
• wherein the cylindrical portion is to be inserted into the openings of the coil members so that the third projection passes through the projection insertion portion, and
• wherein after the insertion of the cylindrical portion, the cylindrical portion is to be rotated in the first direction relative to the coil winding so that the third projection moves from one end toward the other end of the coil member, into which the cylindrical portion is first to be inserted, along the coil member whereby the third projection is located between the coil members and whereby the bobbin-side engagement portion comes into engagement with the winding-side engagement portion.

A transformer comprising a coil component, the coil component comprising an electrically insulating coil bobbin having a cylindrical portion, and an electrically conductive coil winding wound around the cylindrical portion,

• wherein the coil winding is comprised of a plurality of coil members of an end-defined ring shape coupled so as to be continuous in a predetermined winding direction,
• wherein the cylindrical portion is inserted in openings of the coil members from one end of the cylindrical portion and along a direction of a center axis of the cylindrical portion,
• wherein an insulating portion protruding outwardly relative to the center axis is integrally provided at the other end of the cylindrical portion, and a bobbin-side engagement portion for engagement between the coil bobbin and the coil winding is formed on a face of the insulating portion opposed to the coil member, and member, the bobbin-side engagement portion being a first projection,
• wherein a winding-side engagement portion engageable with the bobbin-side engagement portion is formed on a face opposed to the insulating portion, of is provided on the coil member into which the cylindrical portion is first to be inserted, inserted, the winding-side engagement portion comprising a second projection and a depression, the second projection being provided on a face to be opposed to the insulating portion, the depression being provided on a reverse face of the face to be opposed to the insulating portion, the depression being engageable with the bobbin-side engagement portion,
• wherein a third projection of the coil bobbin comes into contact with the second projection of the winding-side engagement portion before the depression of the winding-side engagement portion engages with the bobbin-side engagement portion when the third projection is inserted into a slit and the coil bobbin is rotated in a second direction opposite to a first direction,
• wherein the third projection protruding outwardly relative to the center axis is provided on an outer peripheral surface between the one end and the other end of the cylindrical portion,
• wherein the coil member into which the cylindrical portion is first to be inserted, has a projection insertion portion extending from an inner periphery to an outer periphery thereof, the projection insertion portion being the slit between one end and the other end of the coil member,
• wherein the cylindrical portion is to be inserted into the openings of the coil members so that the third projection passes through the projection insertion portion, and
• wherein after the insertion of the cylindrical portion, the cylindrical portion is to be rotated in the first direction relative to the coil winding so that the third projection moves from one end toward the other end of the coil member, into which the cylindrical portion is first to be inserted, along the coil member whereby the third projection is located between the coil members and whereby the bobbin-side engagement portion comes into engagement with the winding-side engagement portion.

A DC-DC converter comprising a transformer, the transformer comprising a coil component, the coil component comprising an electrically insulating coil bobbin having a cylindrical portion, and an electrically conductive coil winding wound around the cylindrical portion,

• wherein the coil winding is comprised of a plurality of coil members of an end-defined ring shape coupled so as to be continuous in a predetermined winding direction,
• wherein the cylindrical portion is inserted in openings of the coil members from one end of the cylindrical portion and along a direction of a center axis of the cylindrical portion,
• wherein an insulating portion protruding outwardly relative to the center axis is integrally provided at the other end of the cylindrical portion, and a bobbin-side engagement portion for engagement between the coil bobbin and the coil winding is formed on a face of the insulating portion opposed to the coil member, and member, the bobbin-side engagement portion being a first projection,
• wherein a winding-side engagement portion engageable with the bobbin-side engagement portion is formed on a face opposed to the insulating portion, of is provided on the coil member into which the cylindrical portion is first to be inserted, inserted, the winding-side engagement portion comprising a second projection and a depression, the second projection being provided on a face to be opposed to the insulating portion, the depression being provided on a reverse face of the face to be opposed to the insulating portion, the depression being engageable with the bobbin-side engagement portion,
• wherein a third projection of the coil bobbin comes into contact with the second projection of the winding-side engagement portion before the depression of the winding-side engagement portion engages with the bobbin-side engagement portion when the third projection is inserted into a slit and the coil bobbin is rotated in a second direction opposite to a first direction,
• wherein the third projection protruding outwardly relative to the center axis is provided on an outer peripheral surface between the one end and the other end of the cylindrical portion,
• wherein the coil member into which the cylindrical portion is first to be inserted, has a projection insertion portion extending from an inner periphery to an outer periphery thereof, the projection insertion portion being the slit between one end and the other end of the coil member,
• wherein the cylindrical portion is to be inserted into the openings of the coil members so that the third projection passes through the projection insertion portion, and
• wherein after the insertion of the cylindrical portion, the cylindrical portion is to be rotated in the first direction relative to the coil winding so that the third projection moves from one end toward the other end of the coil member, into which the cylindrical portion is first to be inserted, along the coil member whereby the third projection is located between the coil members and whereby the bobbin-side engagement portion comes into engagement with the winding-side engagement portion.

A DC-DC converter comprising a coil component, the coil component comprising an electrically insulating coil bobbin having a cylindrical portion, and an electrically conductive coil winding wound around the cylindrical portion,

• wherein the coil winding is comprised of a plurality of coil members of an end-defined ring shape coupled so as to be continuous in a predetermined winding direction,
• wherein the cylindrical portion is inserted in openings of the coil members from one end of the cylindrical portion and along a direction of a center axis of the cylindrical portion,
• wherein an insulating portion protruding outwardly relative to the center axis is integrally provided at the other end of the cylindrical portion, and a bobbin-side engagement portion for engagement between the coil bobbin and the coil winding is formed on a face of the insulating portion opposed to the coil member, and member, the bobbin-side engagement portion being a first projection,
• wherein a winding-side engagement portion engageable with the bobbin-side engagement portion is formed on a face opposed to the insulating portion, of is provided on the coil member into which the cylindrical portion is first to be inserted, inserted, the winding-side engagement portion comprising a second projection and a depression, the second projection being provided on a face to be opposed to the insulating portion, the depression being provided on a reverse face of the face to be opposed to the insulating portion, the depression being engageable with the bobbin-side engagement portion,
• wherein a third projection of the coil bobbin comes into contact with the second projection of the winding-side engagement portion before the depression of the winding-side engagement portion engages with the bobbin-side engagement portion when the third projection is inserted into a slit and the coil bobbin is rotated in a second direction opposite to a first direction,
• wherein the third projection protruding outwardly relative to the center axis is provided on an outer peripheral surface between the one end and the other end of the cylindrical portion,
• wherein the coil member into which the cylindrical portion is first to be inserted, has a projection insertion portion extending from an inner periphery to an outer periphery thereof, the projection insertion portion being the slit between one end and the other end of the coil member,
• wherein the cylindrical portion is to be inserted into the openings of the coil members so that the third projection passes through the projection insertion portion, and
• wherein after the insertion of the cylindrical portion, the cylindrical portion is to be rotated in the first direction relative to the coil winding so that the third projection moves from one end toward the other end of the coil member, into which the cylindrical portion is first to be inserted, along the coil member whereby the third projection is located between the coil members and whereby the bobbin-side engagement portion comes into engagement with the winding-side engagement portion.