The present invention relates to an inductor, wherein the inductor according to the present invention includes: a body, a winding wire winded around the body, and a housing used for covering the body, according to the present invention, the inductor reduces the volume and increases the withstanding voltage of inductor by twisting the wires, and the present invention also provide a production method of the inductor can simplify the production process of inductors.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to the structure and the manufacture of an inductor, and more particularly, to an improvement of an inductor.

2. Description of the Prior Art

Nowadays, with the development of electronic component, inductors are widely applied in the circuit of communication system, signal processing system, electrical filter, tank circuit, etc. Besides, as times change, size of the electronic components must be scaled down due to the volume reduction of electronic systems, wherein engineers are dedicated in reducing the size and the withstanding voltage of the inductors so as to eliminate the chances of arc generation.

Inductor is a passive component in electronic circuit and consisted of ferrite core and coil. In order to comply with different kinds of electronic circuits, there are various forms of inductors are developed. Moreover different forms of inductors usually have different inductance properties; for example, the inductance property of a choke inductor is obviously different from a coil inductor.

Please refer toFIG. 1, there is shown a stereo view of a conventional inductor. As shown inFIG. 1, a conventional inductor comprises a winding portion P11and two flange portions P12, wherein each the flange portion P12has four wire accommodating portions P121. when manufacturing the conventional inductor, it needs to firstly wind four enameled wires P2around the said winding portion P11, and then respectively disposing the two terminal ends of each enameled wires P2on the wire accommodating portions P121.

Continuously referring toFIG. 1, and please simultaneously refer toFIG. 2, where a schematic assembly diagram of the conventional inductor and PCB board is illustrated. As shown inFIG. 1andFIG. 2, the two wire accommodating portions P121located in the middle must to be shorted based on the electronic component characteristics, such that the four wire accommodating portions P121are respectively contacted to first conductive plate P31and second conductive plate P32of PCB board P3, so as to make the said four enameled wires P2be pairwise shorted to each other.

However, in the process of manufacturing the conventional inductor, due to the said two flange portions P12are respectively disposed on the both ends of the winding portion P11, the number of turns and the length of the enameled wires are directly limited to the length of the winding portion P11, in this case, the size of the winding portion P11usually have to be bigger for increasing the inductance characteristics of inductor, thus, the size of inductor would be increased. Therefore, how to strike a balance between the inductance characteristic and the size of inductor often let manufacturers and designers into a dilemma.

Inheriting to above description, due to the structure of conventional inductor disposed four wire accommodating portions P121for respectively accommodating the both sides of each of the enameled wires, then shorting the enameled wires via the second conductive plate P32of the PCB board P3; however, during the PCB board P3manufacturing process, the second conductive plate P32must to be bigger for being contact with two of the wire accommodating portions P121and bigger conductive plate would increase the manufacturing cost.

Accordingly, in view of the conventional inductor still have some shortcomings and drawbacks, the inventor of the present application has made great efforts to make inventive research thereon and eventually provided an inductor.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide an inductor, which reduces the volume and increases the withstanding voltage of inductor by twisting the wires, and the present invention also provide a production method of the inductor can simplify the production process of inductors.

Accordingly, to achieve the above objectives of the present invention, the inventor proposes an inductor, comprising:a body;a winding wire, being winded around the body, wherein the winding wire comprises at least two primary-side wires and at least two secondary-side wires;a housing, being used for covering the body;wherein the body is formed with two primary-side welding protrusions, a primary-side center-tapped protrusion, two secondary-side welding protrusions, and a secondary-side center-tapped protrusion;wherein one end of the at least two primary-side wires are respectively welded on the two primary-side welding protrusions, and the other end of the two primary-side wires being welded on the primary-side center-tapped protrusion;wherein one end of the at least two secondary-side wires are respectively welded on the two secondary-side welding protrusions, and the other end of the two secondary-side wires are welded on the secondary-side center-tapped protrusion.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

To more clearly describe an inductor according to the present invention, embodiments of the present invention will be described in detail with reference to the attached drawings hereinafter.

With reference toFIG. 3,FIG. 4,FIG. 5,FIG. 6, andFIG. 7, there are respectively shown a stereo view of winding wire according to the present invention, a schematic assembly diagram of an inductor of the present invention, a second schematic assembly diagram of the inductor, a sectional side view of housing, and a schematic diagram of welding point. As shown in FIGs, an inductor1of the present invention consists of a body12, a winding wire11winded around the body12, and a housing13used for covering the body12, wherein the body12and the housing13are made of a plastic doped with iron powder.

Moreover, the winding wire11comprises at least two primary-side wires (111,112) and at least two secondary-side wires (113,114), wherein the primary-side wires and the secondary-side wires are twisted together, and the said primary-side wires (111,112) and the said secondary-side wires (113,114) consist of a copper wire and an insulating layer enclosing the copper wire.

Furthermore, a recess132is formed in the inner bottom of the housing13, wherein when the housing13covers the body12, winding portion121of the body12is housed by the housing13and the lower end of the winding portion121is disposed in the recess132.

Besides, the said inductor1according to the present invention can be manufactured via the following steps: wire intertwined step, wire winded around step, and housing covering step. In more detail, as theFIG. 3shown, the wire intertwined step is finished by intertwining at least two primary-side wires (111,112) and at least two secondary-side wires (113,114) together so as to make the winding wire11, wherein the both terminal ends of the primary-side wires and the secondary-side wires (111a,111a′,112a,112a′,113b,113b′,114b,114b′) are respectively located at both ends of the winding wire11.

After finish the wire intertwined step, the manufacturing process implements the wire winded around step, winding the winding wire11around the body12and welding the winding wire11thereon; wherein the body12is formed with two primary-side welding protrusions (124a,125a), a primary-side center-tapped protrusion123a, two secondary-side welding protrusions (124b,125b), and a secondary-side center-tapped protrusion123b.

With reference toFIG. 7, according to the technique of the present invention, one end of the at least two primary-side wires (111,112) are respectively welded on the two primary-side welding protrusions (124a,125a), and the other end of the two primary-side wires (111,112) being welded on the primary-side center-tapped protrusion123a; moreover, one end of the at least two secondary-side wires (113,114) are respectively welded on the two secondary-side welding protrusions (124b,125b), and the other end of the two secondary-side wires (113,114) are welded on the secondary-side center-tapped protrusion123b.

Additionally, the body12further comprises two wire locating slots126formed between the primary-side (primary-side welding protrusions and primary-side center-tapped protrusion) and the secondary-side (secondary-side welding protrusions and secondary-side center-tapped protrusion) of the body12; wherein the primary-side wires (111,112) and the secondary-side wires (113,114) are respectively located and welded on welding portion122via the wire locating slots126.

However, there also can be merely one wire locating slot formed on the body12in other embodiments, and the primary-side wires and secondary-side wires located and welded on the welding portion through the said wire locating slot, so as to simplify the structure of the inductor.

Finally, during the housing covering step, the housing13covers the body12, wherein refer toFIG. 3,FIG. 4, andFIG. 6, the body12comprises the welding portion122and the winding portion121, moreover, the primary-side welding protrusions (124a,125a), the primary-side center-tapped protrusion123a, the secondary-side welding protrusions (124b,125b), and the secondary-side center-tapped protrusion123bbeing formed on the welding portion122, and the winding wire11being winded around the winding portion121.

Please refer toFIG. 8,FIG. 9,FIG. 10,FIG. 11A to 11D, andFIG. 12, there are respectively shown a stereo view of the inductor of second embodiment, a stereo view of body, a sectional side view of housing, a motion diagram of wire winded around body, and a schematic assembly diagram of inductor. As the FIGs shown, the inductor of the present invention also includes a second embodiment, and according to the second embodiment, the body12of the inductor1further comprises a blocking portion127formed on the lower end of the winding portion121; moreover, the housing13is provided with an accommodating hole131for being corresponded to the blocking portion127; therefore, when the housing13covers the body12, the winding portion121is housed by the housing13and the blocking portion127is exposed out of the housing13via the accommodating hole131.

Furthermore, with reference toFIG. 11AtoFIG. 11D, during the winding wire11winds around the body12, first of all, respectively weld one end (111a,112a) of the at least two primary-side wires (111,112) on the primary-side welding protrusion124aand the primary-side center-tapped protrusion123avia one of the wire locating slots126; afterward, half turn the body12for facilitating one end (113b,114b) of the at least two secondary-side wires (113,114) respectively weld on the secondary-side welding protrusion125band the secondary-side center-tapped protrusion123bthrough the other wire locating slots126.

Then, spin the body12for winding the winding wire11around the body12from start to end and continually winding back to the top of the body12. Finally, respectively weld the other end (112a′,111a′) of the at least two primary-side wires (111,112) on the primary-side welding protrusion125aand the primary-side center-tapped protrusion123avia one of the wire locating slots126; meanwhile, respectively weld the other end (114b′,113b′) of the at least two secondary-side wires (114,113) on the secondary-side welding protrusion124band the secondary-side center-tapped protrusion123bvia the other wire locating slots126.

Through above descriptions, the constituting elements of the related technology features of the inductor of the present invention have been clearly and completely introduced; in summary, the present invention has the following advantages:

1. Through the twisting of the wires facilitates the size of inductor can be remained when the length of the winding wire is increasing.

2 Inheriting to advantage above, through the twisting of the wires make the structure of the inductor change, so as to decrease the volume of the inductor and replace the conventional inductor.

3. Through the center-tapped protrusions and the welding protrusions make the inductor merely have six output terminals, therefore, PCB board just need six pins for connecting the inductor.

4. Through the production method of the present invention, not only greatly reduce the volume of inductor, but also simplify the production process thereof so as to reduce the manufacturing cost of inductors.

The above description is made on embodiments of the present invention. However, the embodiments are not intended to limit scope of the present invention, and all equivalent implementations or alterations within the spirit of the present invention still fall within the scope of the present invention.