Toroidal choking coil

#The invention relates to a toroidal choking coil comprising a fixing device to enable the toroidal choking coil to be attached to electric appliances or the like. The fixing device comprises a hoop-like collar, fasteners resting on the collar for attaching the choking coil onto fastening surfaces of the appliances or the like.

#The invention also relates to a method for manufacturing such a toroidal choking coil.

#A toroidal choking coil is an electric, technical component wound around an annular core that usually comprises one or more adjacent iron rings; more precisely, it is a coil used for filtering interference that occurs in electric current. A fixing device of the toroidal choking coil refers to a device that enables the toroidal choking coil to be attached to an electric appliance or the like.

#The invention will be further explained with reference to the accompanying drawings, in which

#FIG. 1 is a schematic view of a typical toroidal choking coil as seen in the crosswise direction thereof,

#FIG. 2 is a schematic view of the typical toroidal choking coil of FIG. 1 as seen in the longitudinal direction thereof,

#Referring to FIGS. 1 to 8, an example of a typical toroidal choking coil of the invention will be described.

#According to FIGS. 1 and 2, a typical toroidal choking coil 1 generally comprises a core 2 and a winding 3 wound around the core 2. The core 2 is typically made of iron. The shape of the core 2 is typically annular, and the core comprises one or more rings 7 arranged parallelly side by side. The winding 3 is typically made of an insulated copper conductor and wound around the rim formed by a ring or rings. The annular core 2 thus comprises an inner rim 8 and an outer rim 9.

#FIGS. 3 and 4 describe a fixing device 4 of the toroidal choking coil 1 according to a preferred embodiment of the invention. FIGS. 5 and 6 show a toroidal choking coil according to a preferred embodiment of the invention, comprising a fixing device 4.