Sumida Corporation

Juichi Oki

Tomohiro Kajiyama

Mitsugu Kawarai

Shinichi Sakamoto

Tsutomu Otsuka

Motomi Takahashi

Teruaki Tanaka

Yoshiyuki Hatayama

Yoshiyuki Tahara

A manufacturing method of a coil component comprising the steps of: preparing a coil assembly body in which a coil is attached on a magnetic core and a mold body which is formed with a cavity portion in the inside thereof and which includes at least one opening portion, putting a viscous admixture including magnetic powders and thermosetting resin and the coil assembly body in the cavity portion, pushing the put-in viscous admixture in the mold body, and thermally-curing the pushed-in viscous admixture and forming a magnetic exterior body which covers the coil assembly body.

Manufacturing method of coil component and coil component

A coil component includes a core body, a coil, and a metal terminal. The core body has a mounting surface, an upper surface having a recess, and a side surface. The coil has an embedded part embedded in the core body, and a protruding part protruding from the core body. The metal terminal is electrically connected to the first protruding part of the coil. The first metal terminal has a first plate arranged along the side surface, a second plate connected to an upper end of the first plate and arranged along the upper surface, and a third plate connected to a lower end of the first plate and arranged along the mounting surface. The second plate in the recess has a first arc-shaped part. The recess has a second arc-shaped part. The second arc-shaped part extends along a contour of the first arc-shaped part.

Coil component

An inductor includes a magnetic core and a conductor member. The conductor member is configured with: an insertion part that is inserted into the magnetic core; first and second outer surface arrangement parts that are directly or indirectly connected to ends of the insertion part and are arranged along first and second outer surfaces of the magnetic core, respectively; and first and second terminal parts that are connected to the first and second outer surface arrangement parts, respectively. The insertion part includes an insertion first sub part and an insertion second sub part that is stacked on the insertion first sub part. A sum of the thicknesses of the insertion first and second sub parts is larger than a thickness of the first outer surface arrangement part and larger than a thickness of the second outer surface arrangement part.

Inductor

A mold apparatus is provided for manufacturing a coil component. The mold apparatus includes a support plate, a die on the support plate, a lid, and a press member that presses the lid toward the support plate. The die has a peripheral side wall defining an opening opposite the support plate. The coil component is placeable in an inner space of the die interior of the side wall. The lid is insertable via the opening into the inner space with an outer peripheral edge of the lid slidably received by the side wall of the die.

Mold apparatus for manufacturing a coil component

A manufacturing method of a coil component including the steps of: assembling and forming a coil assembly body in which a coil is attached to a magnetic-body core; and inputting the coil assembly body and a putty-like admixture including magnetic powders and a thermosetting resin into an inner cylindrical portion of a die, further including the steps of: pressing the admixture which is inputted into the inner cylindrical portion, applying vibration for giving shear force with respect to the admixture which is inputted into the inner cylindrical portion for decreasing the viscosity of the aforesaid admixture, and thermosetting and forming a magnetic cover portion by heating an integrated object comprised of the admixture which was applied with the vibration and the coil assembly body and by thermally-curing the thermosetting resin included in the admixture.

Manufacturing method of coil component and mold apparatus for manufacturing the coil component

A magnetic core including a winding core portion; and a flange portion provided on the axial end side of at least one of the winding core portion, wherein the flange portion is formed such that contour line OLof cross-section P, of the flange portion, which becomes perpendicular with respect to the axis line of the winding core portion forms a shape of a first irregular convex polygon which is substantially a non-regular polygon and also a convex polygon, and the contour line OLcontacts with respect to all of sides Sb, Sb, Sband Sbwhich are the four sides of a first circumscribed rectangle which becomes minimum within imaginary rectangles circumscribed with the contour line OLand also, the contour line OLincludes side Saand side Sawhich respectively overlap with portions of respective ones of the side Sband the side Sb

Method of magnetic core

A magnetic core including a winding core portion; and a flange portion provided on the axial end side of at least one of the winding core portion, wherein the flange portion is formed such that contour line OLof cross-section P, of the flange portion, which becomes perpendicular with respect to the axis line of the winding core portion forms a shape of a first irregular convex polygon which is substantially a non-regular polygon and also a convex polygon, and the contour line OLcontacts with respect to all of sides Sb, Sb, Sband Sbwhich are the four sides of a first circumscribed rectangle which becomes minimum within imaginary rectangles circumscribed with the contour line OLand also, the contour line OLincludes side Saand side Sat which respectively overlap with portions of respective ones of the side Sband the side Sb

Magnetic core, magnetic component and design method of magnetic core

A magnetic component includes: a magnetic core including an upper flange portion on one end side of a winding shaft portion and a lower flange portion on another end side of the winding shaft portion; a pair of conductive terminals attached to the lower flange portion; and a coil including a conductive wire. The terminals each include an electrode portion extending along a lower surface of the lower flange portion and including an end portion projecting outward relative to an outer periphery of the lower flange portion, and a columnar wire splicing portion erected from the end portion of the electrode portion, and an upper end surface of the wire splicing portion includes a wire splicing surface for conductive wire connection.

Magnetic component and method for manufacturing magnetic component

A magnetic component may include a core including an upper collar, a lower collar, and a spool portion around which a lead wire is wound and external terminals which are directly disposed on the lower collar and to which both ends of the lead wire are connected. The external terminals may include a terminal end fixing portion. The terminal ends of the lead wire may be positioned by the terminal end fixing portions, and may be connected to the external terminals.

Magnetic component

An inductor is arranged such that the projection area of each terminal portion falls within a square circumscribing the projection area of an upper flange portion under a state where the inductor is projected orthogonally in the direction of the axis. Projection area of each end of a winding connected to the joint of the terminal portions also falls within the square. Consequently, an installation space can be secured easily on a board, and a space saving inductor in which a space for installation of other components can be secured easily on the periphery can be obtained.

An inductance element () according to the present invention includes: a drum core () provided with an upper flange portion (), a lower flange portion (), a columnar leg portion () and a wiring frame portion () surrounded by the upper flange portion (), the lower flange portion () and the columnar leg portion (); a coil () arranged at wiring frame portion () and formed by winding a wire (); and a resin curing portion () formed by curing a mixed material mixing magnetic powders and resin and coating at least the wiring frame portion () and the coil (). In addition, a plurality of terminal members () as well as a bottom portion () and a plurality of peripheral wall portions () are included, in which a space portion () is formed between the peripheral wall portion () and the drum core (), and the mixed material is filled into the space portion () to form the resin curing portion.

Inductance element

There is provided a micro surface mount coil unit in which the occurrence of positional shift and poor soldering at the time of soldering of the coil unit is avoided without decreasing the width of a coil winding portion of coil form, and the shock resistance of coil unit is increased. The coil unithas a drum-shaped corein which a coil form part around which a coil wire is wound is arranged between flange partsandand a lead framebondingly fixed to the lower flange part. The lead framehas left and right lead frame partsA andB bonded to the lower flange part, and the outside surface of a bottom surfaceof each of the lead frame partsA andB is separated into a first region forming an external connecting terminaland a second region not forming the external connecting terminalby notches

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Natori, Japan

Juichi Oki