JPH0520416U - Surface mount type noise filter - Google Patents

Abstract

(57) [Abstract] [Purpose] A toroidal coil in which a winding is wound around a toroidal core coated with a surface insulating coating without using a toroidal case with a central partition plate so that it is small and easy to wind. , And the substrate-mounting terminal has a surface-mounting type terminal structure, which is a surface-mounting type noise filter that is easy to manufacture. [Structure] A surface mounting terminal 5 attached to a lower surface which is integrated with a holding portion 4 for connecting a winding terminal to an upper surface, and a toroidal coil 6 having a plurality of windings on a toroidal core having an electrically insulating coating on the surface. , A circular partition 2 of a square base 1 having a central partition plate 3 for partitioning the windings mounted on a central inner bottom integrally formed with the surface-mounting terminals, and filling the center portion of the toroidal coil with a filling resin to wind the windings. The surface mount type noise filter according to the present invention is prepared by soldering the terminal to the holding part and soldering it.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a surface mount type noise filter for suppressing electromagnetic noise using a wire wound toroidal coil.

[0002]

[Prior Art]

 This type of conventional noise filter has a structure in which the toroidal core is housed in a toroidal case with a partition plate in the center, winding is applied to each partitioned section, and winding terminals are mounted on the board through the terminal board. Met. Therefore, this type of noise filter has a problem that it takes time for winding because a toroidal case having a partition plate in the center of the core case is wound in advance and it cannot be applied to surface mounting.

[0003]

[Problems to be solved by the device]

 In order to eliminate these drawbacks, the present invention adopts a structure in which the board mounting surface is a surface mounting terminal structure, and the surface mounting terminal is a structure in which a pin terminal raised from the mounting surface is provided, and a winding is formed in the center of the circular recess that houses the toroidal coil. The central partition plate is attached to separate the windings to ensure electrical insulation between multiple windings, and the central partition plate and surface mount terminals are integrally molded with an electrical insulating material to form a square base. This is a low-cost surface mount type noise filter that is easy to wind and has a guaranteed dielectric withstand voltage between windings. It is in the provision of Ruta.

[0004]

[Means for Solving the Problems]

 A toroidal coil is formed by winding multiple conductors around a toroidal coil with an electrically insulating coating on the surface, and circular recesses for accommodating the toroidal coil opened on the top surface are provided, and surface mount terminals are provided on the bottom surfaces of the four corners. , A surface mounting terminal is bent 90 degrees to form a holding portion for connecting a lead wire of a winding at an upper end, and a central base plate for insulating between windings is provided on an inner bottom of the circular recessed portion to form a square base electrically insulating material. , The toroidal coil windings are distinguished by the central partition plate, the central hole of the toroidal coil is filled with resin, and the toroidal coil is fixed to the rectangular base, and the winding terminals are held by the surface mounting terminals. The surface mount type noise filter of the present invention is configured by passing through the parts and fixing by soldering.

That is, the present invention has a toroidal coil in which a plurality of windings are separately wound on a toroidal core having an electrically insulating coating on the surface, and a toroidal coil is connected to a substrate at a lower part and a winding terminal is connected to an upper end. The surface of the toroidal coil is housed in a circular recess on the top surface of a box-shaped rectangular base consisting of an insulating container with a surface-mounting terminal that has a section and a central partition plate for insulation between windings on the inner bottom. This is a surface mount type noise filter obtained by filling a central hole of a toroidal coil with a filling resin, fixing the toroidal coil to a rectangular base, and winding and soldering the end of the winding to the pinching portion.

[0006]

[Action]

 The surface mount type noise filter according to the present invention is a central partition plate that fits within the inner diameter of a toroidal core divided according to the number of windings wound on a toroidal core coated with an electrically insulating coating on the surface. Are mounted on the bottom of the circular recess that houses the toroidal coil, and multiple windings are mounted on a rectangular base that is integrally molded with surface-mounting terminals that correspond to the number of windings in advance using a resin molding material made of electrical insulating material. The toroidal coil, which is divided and wound, is placed in the circular recess by dividing the winding for each partition of the central partition plate. The surface mount type noise filter is small and easy to manufacture because it has a structure that fixes the toroidal coil and improves the electrical withstand voltage between the windings by filling it with an insulating resin agent.

[0007]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. 1 is an exploded perspective view of a surface mount type noise filter according to the present invention, and FIG. 2 is an assembled perspective view of a surface mount type noise filter according to the present invention. In Fig. 1, in the center of the upper surface of the rectangular base 1 made of a resin molding material made of an electrical insulating material, there is a toroidal coil with a split winding on a toroidal core with an electrically insulating coating on the bottom surface. , Toroidal core Inner diameter of the toroidal core is provided with a circular recess 2 for accommodating a central partition plate, and surface mounting for winding and fixing the winding end of the winding 7 of the toroidal coil around the rectangular base by soldering. This is a structure in which the holding portion 4 integrated with the terminal 5 is provided. The toroidal coil 6 is housed in the circular recessed portion 2, the winding end of the winding 7 of the toroidal coil 6 is sandwiched between the sandwiching parts 4, soldered and fixed, and the central partition plate in the center of the toroidal coil 6 Insulation resin such as silicon is filled in place 3 and the toroidal coil is fixed to a rectangular base to make a surface mount type noise filter that suppresses common mode noise. Although the embodiment of the present invention has been described as an example of using a toroidal coil having two windings on the toroidal coil, a toroidal coil having three windings or four windings is used. In this case, the central partition plate 3 is a central partition plate in which the inner diameter of the toroidal core of the toroidal coil that fits inside the circular recess is centered around the center of the circular recess. It is possible to form a multi-winding, surface-mount type noise filter compatible with toroidal coils by mounting the same number of wires as the number of winding ends around the.

[0008]

[Effect of the device]

 As described above, the surface-mounted noise filter according to the present invention has a structure in which the conventional noise filter of this type has a winding on a toroidal case having a partition plate in the center, whereas the toroidal coil has a surface. An insulating copper wire is sprinkled on a toroidal core that has been subjected to electrical insulation coating, and the toroidal coil is fixed to the rectangular base by storing it in the circular recesses of the rectangular base with a central partition plate separately for each winding. Since it has a structure in which it is fixed to the rectangular base with resin, it is possible to provide a surface-mounted noise filter that has the advantage of being easier and more compact to assemble than before.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a surface mount type noise filter according to the present invention.

FIG. 2 is a perspective view showing a completed surface mount type noise filter according to the present invention.

[Explanation of symbols]

 1 Square base 2 Circular recess 3 Central partition plate 4 Holding part 5 Surface mount terminal 6 Toroidal coil 7 Winding

Claims (1)

[Scope of utility model registration request] 1. A surface having a toroidal coil in which a plurality of windings are individually divided and wound on a toroidal core having an electrically insulating coating on the surface, and a holding portion for connecting a winding terminal to a substrate at a lower portion and a winding terminal at an upper end. The toroidal coil is housed in a circular recess opened on the top surface of a box-shaped rectangular base made up of an insulating container with mounting terminals and a central partition plate for insulation between windings on the inner bottom. A surface mount type noise filter in which a toroidal coil is filled in a central hole of a coil and fixed to a rectangular base, and the end portion of the winding is entangled and soldered to the holding portion.