Patent Description:
The present disclosure relates to the field of inductance device manufacturing technology, especially relates to an inductor skeleton structure, an inductance device and a luminaire. In <CIT>, a surface-mount type coil structure is described. The coil structure according to the described structure allows a winding to a substrate. The coil structure comprises a drum shaped magnetic core made of a magnetic material. The described structure further comprises a vertically arranged coil shaft, wherein a winding is wound around the coil shaft. In <CIT>, a further inductor structure including a magnetic core on a top surface of a terminal table is described. The inductor structure comprises a plurality of L-shaped conductors that are inserted into the terminal table, so that two ends of each of the L-shaped conductors project from a side surface of the terminal table. In <CIT>, a further inductor structure is described comprising a base body, a magnetic core arranged from the base body and two wire windings which are symmetrically wrapped on the magnetic core. The base body of the inductor structure comprises a plurality of wire guide hole pairs which penetrate through the base body and which are symmetrically arranged.

Inductance devices are components that can convert electrical energy into magnetic energy and store the magnetic energy, and have been widely used in various electronic products such as aerospace, aviation, communication and household appliances. An inductance device is generally composed of a skeleton, a winding, etc. inductor skeletons in the prior art come in a variety of types, such as I-shaped inductance devices.

Inductance devices in related technologies usually use pins as electrical connectors. It is necessary to pass the pins through pads of a printed circuit board (PCB) before welding.

With the development of assembly technology, surface-mounted electronic devices are increasingly favored by people because they are suitable for automated assembly with high production efficiency. However, an urgent problem to be solved in the art is how to make inductance devices applicable to the surface mount technology.

Embodiments of the present disclosure provide an inductor skeleton structure and an inductance device to solve one of the above-mentioned problems.

Embodiments of the present disclosure adopt following technical solutions.

According to the present invention it is provided an inductor skeleton structure, comprising a pedestal and a main winding part. The pedestal comprises a base, a fixing part, and an auxiliary winding part, the fixing part is disposed on the base, the base comprises a downward fitting surface and a circumferential side surface surrounding the fitting surface, and the auxiliary winding part is extended away from the base from the side surface; the main winding part has a main winding groove for winding a main coil; wherein the main winding part comprises an upper end portion, a lower end portion and a main body portion, the main body portion is between the upper end portion and the lower end portion, and edges of both the upper end portion and the lower end portion are beyond the main body portion and define together with the main body portion the main winding groove; the main winding part is fixed on a side, which is facing away from the fitting surface, of the base by the fixing part; a downward surface of the auxiliary winding part is a welding surface, and the auxiliary winding part is used for winding an auxiliary coil capable of covering at least a portion of the welding surface; and the fixing part is a fixing receptacle.

Optionally, in the above inductor skeleton structure, the side, which is facing away from the fitting surface, of the base is a bearing surface, and the fixing part is disposed on the bearing surface; and the main winding part is capable of being embedded in the fixing receptacle; the fixing receptacle comprises a bottom, a wall, and an opening defined by the wall; a direction from the bottom to the opening is denoted as a first direction, and the bearing surface, the fitting surface and the welding surface are all perpendicular to the first direction.

Optionally, in the above inductor skeleton structures, the lower end portion is in a shape matching a shape of the fixing receptacle and is capable of being embedded in the fixing receptacle, and in a case that the lower end portion is embedded in the fixing receptacle, the lower end portion, the main body portion and the upper end portion are arranged in sequence along the first direction.

According to the present invention, an inner contour of the fixing receptacle and an outer contour of the lower end portion are both in a circular shape, a circumferential limit piece is disposed on the fixing receptacle, and a circumferential limit matching piece is disposed on the lower end portion; and the lower end portion and the fixing receptacle are capable of being limited from rotation around a center of the circular shape by matching of the circumferential limit piece and the circumferential limit matching piece.

Optionally, in the above inductor skeleton structures, the circumferential limit piece is a limit projection on the wall, and the circumferential limit matching piece is a limit notch matching the limit projection.

Optionally, in the above inductor skeleton structures, the circumferential limit piece is extended to the opening along the first direction, and the circumferential limit matching piece is extended through two sides of the lower end portion along the first direction.

Optionally, in the above inductor skeleton structures, a plurality of or a plurality of groups of circumferential limit pieces are circumferentially uniformly distributed on the fixing receptacle, and a plurality of or a plurality of groups of circumferential limit matching pieces are circumferentially uniformly distributed on the lower end portion corresponding to the circumferential limit pieces.

Optionally, in the above inductor skeleton structures, a side surface, which is facing away from the lower end portion, of the upper end portion is a flat adsorption surface; and in a case that the lower end portion is embedded in the fixing receptacle, the fixing receptacle is not beyond the adsorption surface.

Optionally, in the above inductor skeleton structures, the fixing receptacle is formed of a magnetic shielding material; in the case that the lower end portion is embedded in the fixing receptacle, the upper end portion is not beyond the opening of the fixing receptacle.

Optionally, in the above inductor skeleton structures, the upper end portion and the lower end portion are structurally symmetrical about the main body portion.

Optionally, in the above inductor skeleton structures, a clasp is disposed in the fixing receptacle; in the case that the lower end portion is embedded in the fixing receptacle, the clasp is clamped with the lower end portion.

Optionally, in the above inductor skeleton structures, a wire passing gap is formed in the wall in a position corresponding to the auxiliary winding part, and the wire passing gap is extended to the opening of the fixing receptacle along the first direction.

Optionally, in the above inductor skeleton structures, the base has a bottom surface which serves as the fitting surface; the bottom surface is higher than the welding surface and a height difference between the bottom surface and the welding surface enables the auxiliary coil covering the welding surface to be flush with the fitting surface;.

Optionally, in the above inductor skeleton structures, the base has a bottom surface which is flush with the welding surface; a plurality of support feet are disposed on the bottom surface; and an end face, which is facing away from the bottom surface, of each of plurality of support feet forms the fitting surface.

Optionally, in the above inductor skeleton structures, a limit structure is further disposed on the auxiliary winding part to prevent the auxiliary coil wound around the auxiliary limit part from unwinding from the auxiliary winding part.

Optionally, in the above inductor skeleton structures, the limit structure is a limit groove for accommodating a portion of the auxiliary coil.

Optionally, in the above inductor skeleton structures, an extension direction of the limit groove is same as and/or perpendicular to the first direction.

Optionally, in the above inductor skeleton structures, each of two sides, which are symmetrical about the fixing receptacle, of the base is extended to form the auxiliary winding part.

Optionally, in the above inductor skeleton structures, the main winding part is a magnetic core of an I-shaped inductance device.

Optionally, in the above inductor skeleton structures, a surface of the pedestal and/or the main winding part is a reflective surface.

In the second aspect, embodiments of the present disclosure provide an inductance device, comprising a main coil, an auxiliary coil, and the above-mentioned inductor skeleton structure. The main coil is wound within the main winding groove, and the auxiliary coil is wound around the auxiliary winding part and covers the portion of the welding surface.

Optionally, in the above inductance device, the main coil and the auxiliary coil are wound with a single enameled wire or different enameled wires.

Optionally, in the above inductance devices, a count of the auxiliary coil is at least two, and the main coil and the at least two auxiliary coils are wound with a single enameled wire.

Optionally, in the above inductance devices, at least one of the auxiliary coils is individually wound around one auxiliary winding part.

Optionally, in the above inductance devices, at least one of the auxiliary coils is wound around a plurality of auxiliary winding parts on a same side of the base.

In the third aspect, embodiments of the present disclosure provide a luminaire, comprising a lamp, a light source module and a driving module. The light source module and the driving module are both disposed on the lamp and electrically connected to each other; the driving module comprises a driving board; and the above-mentioned inductance device is disposed on the driving board.

Optionally, in the above luminaire, the light source module comprises a light source board which is integrated with the driving board; and a surface of the pedestal and/or the main winding part is a reflective surface.

At least one of the above technical solutions adopted by the present disclosure can achieve following beneficial effects.

In the inductor skeleton structure and the inductance device provided by embodiments of the present disclosure, the main winding part is assembled with the pedestal to form a flat contact surface to adapt to the surface mount technology, thereby improving the assembly efficiency.

The accompanying drawings described herein are provided for further understanding of the present invention, and constitute a part of the present disclosure. The exemplary embodiments and illustrations thereof of the present invention are intended to explain the present invention, but do not constitute inappropriate limitations to the present invention which is defined by the appended claims. In the drawings:.

<NUM>-pedestal, <NUM>-base, <NUM>-bearing surface, <NUM>-fitting surface, <NUM>-side surface, <NUM>-bottom surface, <NUM>-support foot, <NUM>-fixing part/fixing receptacle, <NUM>-wall, <NUM>-bottom, <NUM>-opening, <NUM>-wire passing gap, <NUM>-circumferential limit piece, <NUM>-clasp, <NUM>-auxiliary winding part, <NUM>-welding surface, <NUM>, <NUM>, <NUM>-vertical surface, <NUM>-surface, <NUM>-limit structure/limit groove, <NUM>-main winding part, <NUM>-main winding groove, <NUM>-upper end portion, <NUM>-adsorption surface, <NUM>-lower end portion, <NUM>-circumferential limit matching piece, <NUM>-main body portion, <NUM>-main coil, <NUM>-auxiliary coil.

The technical solutions provided in different embodiments of the present invention are described in detail below with reference to the accompanying drawings.

An embodiment of the present invention discloses an inductance device, as shown in <FIG>, including a pedestal <NUM>, a main winding part <NUM>, a main coil <NUM>, and an auxiliary coil <NUM>.

As shown in <FIG>, the pedestal <NUM> includes a base <NUM>, a fixing part <NUM>, and an auxiliary winding part <NUM>. The base <NUM> typically has a flat structure and includes a bearing surface <NUM>, a fitting surface <NUM> facing away from the bearing surface <NUM>, and a circumferential side surface <NUM> surrounding the bearing surface <NUM>. A contour defined by the side surface <NUM> may be square (see <FIG>), circular (see <FIG>) or in other regular or irregular shapes (see <FIG>). The fixing part <NUM> is typically disposed on one side of the bearing surface <NUM>. The fixing part <NUM> may be fixedly connected to the bearing surface <NUM> and may also be fixedly connected to the side surface <NUM> and stretch over the bearing surface <NUM>.

Referring to <FIG>, the fixing part <NUM> in this embodiment may be structured as a fixing receptacle or structured in other ways as long as it can fix the main winding part <NUM>. In this embodiment, a fixing receptacle is described for example. As shown in <FIG> and <FIG>, the fixing receptacle <NUM> (the reference numeral of the fixing part is used hereinafter for the convenience of description) in this embodiment is disposed on the bearing surface <NUM>. The fixing receptacle <NUM> typically has a wall <NUM>, a bottom <NUM>, and an opening <NUM> defined by the wall <NUM>. A direction from the bottom to the opening is denoted as a first direction a, and the bearing surface <NUM>, the fitting surface <NUM> and a welding surface <NUM> are all perpendicular to the first direction a.

The auxiliary winding part <NUM> extends away from the base <NUM> from the side surface <NUM>.

A downward surface of the auxiliary winding part <NUM> is the welding surface <NUM>. The auxiliary winding part <NUM> is used for winding an auxiliary coil <NUM>, and the wound auxiliary coil <NUM> is required to overlay at least a portion of the welding surface <NUM> for the convenience of welding.

In this embodiment, the welding surface <NUM> and the fitting surface <NUM> may be flush with each other, and may also have a height difference therebetween, which is similar to a step. But regardless of any structure, in the case that the auxiliary coil <NUM> is wound around the auxiliary winding part <NUM>, a portion, covering the welding surface <NUM>, of the auxiliary coil <NUM> is required to keep flush with or go beyond the fitting surface <NUM>, so that the portion, covering the welding surface <NUM>, of the auxiliary coil <NUM> fits on a PCB.

In a solution where a number of auxiliary winding parts <NUM> are distributed uniformly, for example, in a solution where four auxiliary winding parts <NUM> are uniformly distributed on four sides of the base <NUM> as shown in <FIG>, a total area of the portions, covering the welding surface <NUM>, of these auxiliary coils <NUM> is sufficient to make the inductor skeleton structure stably fit on a PCB, the portions, covering the welding surface <NUM>, of the auxiliary coils <NUM> can either extend beyond the fitting surface <NUM> or keep flush with the fitting surface <NUM> in this solution.

In a solution where there are fewer auxiliary winding parts <NUM> (e.g., <FIG>, and <FIG>), due to a small area of the portions covering the welding surface <NUM> and uneven distribution of the auxiliary coils <NUM>, the welding surface <NUM> may be slightly higher than the fitting surface <NUM>, so that the portions, covering the welding surface <NUM>, of the auxiliary coils <NUM> and the fitting surface <NUM> form a substantially flat contact junction surface.

For the above solutions, a variety of different implementations may be adopted. For example, in an implementation shown in <FIG>, the base <NUM> has a bottom surface <NUM>. The bottom surface <NUM> may directly serve as the fitting surface <NUM>. In this case, there is a height difference, like a step, between the welding surface <NUM> and the bottom surface <NUM>, so that the portions, covering the welding surface <NUM>, of the auxiliary coils <NUM> and the fitting surface <NUM> form a substantially flat contact junction surface. The structure in such an implementation is complicated and not easy to form.

In another implementation shown in <FIG>, to facilitate the formation of the above-mentioned height difference between the welding surface <NUM> and the fitting surface <NUM>, it can be contemplated that the bottom surface <NUM> is flush with the welding surface <NUM> and a plurality of support feet <NUM> are disposed on the bottom surface <NUM>. An end face, facing away from the bottom surface <NUM>, of each of these support feet <NUM> will form the fitting surface <NUM> for contact with a PCB. The support feet <NUM> are easy to manufacture or dispose for their small size and simple structure.

In this embodiment, there is no particular limitation on the shape of the auxiliary coil <NUM> as long as it can overlay a portion of the welding surface <NUM>. For example, as shown in <FIG> and <FIG>, the auxiliary coil may be wound circlewise on two vertical surfaces <NUM>, <NUM> adjacent to the welding surface <NUM> and a surface <NUM> on a side, facing the bearing surface <NUM>, of the auxiliary winding part <NUM>, and may also be wound on the vertical surfaces <NUM>, <NUM> and a vertical surface <NUM> on one side, facing away from the base <NUM>, of the auxiliary winding part <NUM>, or wound in other more complicated ways, which will not be described redundantly here.

To prevent the auxiliary coil <NUM> from unwinding from the auxiliary winding part <NUM>, it is desirable to form a limit structure <NUM> on the auxiliary winding part <NUM>. The limit structure <NUM> is used for constraining the auxiliary coil <NUM>, thereby preventing the auxiliary coil <NUM> from unwinding from the auxiliary limit part <NUM>. In this embodiment, the limit structure <NUM> may be disposed on any surface of the auxiliary winding part <NUM>. Since the auxiliary coil <NUM> is integrated, the whole auxiliary coil <NUM> may be prevented from unwinding from the auxiliary limit part <NUM> as long as any portion of the auxiliary coil <NUM> can be prevented from separation from the auxiliary limit part <NUM>. However, to guarantee the welding effect, the welding surface <NUM> may be made as close to a PCB as possible when the inductance device is assembled. Thus, the limit structure <NUM> in this embodiment may be disposed on other surface of the auxiliary winding part <NUM> than the welding surface <NUM>.

In this embodiment, the limit structure <NUM> may be in the form of a limit stop block, a limit stop plate, and the like, and the form of a limit groove is recommended. The limit groove <NUM> (the reference numeral of the limit structure is used hereinafter for the convenience of description) is capable of accommodating a portion of the auxiliary coil <NUM> such that this portion cannot be separated from the auxiliary winding part <NUM>. An extension direction of the limit groove <NUM> may be the same as or perpendicular to or even inclined relative to the first direction a. Moreover, there may be more than one limit grooves <NUM>. For example, the limit groove <NUM> may be formed in each of the vertical surfaces <NUM> and <NUM>. Alternatively, the limit groove <NUM> extended in a direction the same as the first direction a may be formed in the vertical surface <NUM>, while the limit groove <NUM> extended in a direction perpendicular to the first direction a may be formed in the vertical surface <NUM>. A plurality of limit grooves <NUM> are combined to limit the position. A side, facing away from the welding surface <NUM>, of the auxiliary winding part <NUM> is a surface <NUM>. When the limit groove <NUM> is formed in the surface <NUM>, this side may also serve as the bottom of the limit groove <NUM>. In addition, a plurality of segments of limit grooves <NUM> may also be formed in the same surface, which will not be described one by one for example here.

As shown in <FIG> and <FIG>, the main winding portion <NUM> has a main winding groove <NUM> for winding a main coil <NUM>. The main winding part <NUM> may be designed as a structure of a magnetic core (e.g., the magnetic core of an I-shaped inductance device) without any pin in the prior art. Moreover, the main winding part in this embodiment may be of an integrated magnetic core structure. For example, the main winding part <NUM> may include an upper end portion <NUM>, a lower end portion <NUM> and a main body portion <NUM>. The main body portion <NUM> is located between the upper end portion <NUM> and the lower end portion <NUM>. Edges of the upper end portion <NUM> and the lower end portion <NUM> are beyond the main body portion <NUM> and define together with the main body portion <NUM> the above-mentioned main winding groove <NUM>. The main winding groove <NUM> is used for winding the main coil <NUM>, and the upper end portion <NUM> and the lower end portion <NUM> are capable of constraining the form of the main coil <NUM> and preventing the main coil from unwinding from the main body portion <NUM>.

In this embodiment, the main winding part <NUM> is capable of allowing winding of the main coil <NUM> thereof on the one hand, and on the other hand, can be embedded in the fixing receptacle <NUM>, so that the main winding part <NUM> and the pedestal <NUM> are combined to form an integrated skeleton structure and are respectively for winding the main coil <NUM> and the auxiliary coil <NUM> so as to form the inductance device. The pedestal <NUM> provides the inductance device with a flat fitting surface for fitting with a PCB.

To facilitate embedding of the main winding part <NUM> into the fixing receptacle <NUM>, the lower end portion <NUM> has a shape matching that of the fixing receptacle <NUM> so as to extend through the opening <NUM> and be embedded into the fixing receptacle <NUM>, and in the case that the lower end portion <NUM> is embedded in the fixing receptacle <NUM>, the lower end portion <NUM>, the main body portion <NUM> and the upper end portion <NUM> are arranged in sequence in the first direction a.

In this embodiment, when winding the main coil <NUM> and the auxiliary coil <NUM>, the main coil <NUM> and the auxiliary coil <NUM> may be wound sequentially with the same enameled wire (see <FIG>); the main coil <NUM> and the auxiliary coil <NUM> wound in such a way are electrically connected with one another, and power may be directly supplied to the main coil <NUM> through the auxiliary coil <NUM>. In addition, the main coil <NUM> and the auxiliary coil <NUM> in this embodiment may also be wound with different enameled wires, respectively. In this case, the auxiliary coil <NUM> is not in electrical connection relationship with the main coil <NUM>, and the auxiliary coil <NUM> is merely used for fixation during welding.

Since the main coil <NUM> is required to have at least one input end and one output end, at least two of the auxiliary coils <NUM>, under normal circumstances, and the main coil <NUM> are wound with the same enameled wire. The two auxiliary coils <NUM> may serve as the input end and the output end of the main coil <NUM>, respectively. As a matter of course, to adapt to different application environments, the number of input ends and that of output ends of the main coil <NUM> may vary. In this case, the number of the auxiliary coils <NUM> electrically connected to the main coil <NUM> may be further increased.

When assembling the inductance device on a PCB, an enamel covering on the portion, covering the welding surface <NUM>, of each auxiliary coil <NUM> is melted at a high temperature to expose a metal wire therein. At the high temperature, the metal wire will be melted and flow to a pad on the PCB. After the melt metal is cooled and solidified, the welding between the auxiliary coil <NUM> and the pad is completed. Compared with a traditional way of connection through pins, such an assembly way has higher efficiency. Furthermore, since the pad needs not have a region reserved for a pin to pass through in this case, the area of the pad can be greatly reduced and even the pad can be completely hidden under the inductance device, so that the area of the PCB can be greatly reduced.

As shown in <FIG>, to improve the stability of assembly, two sides, symmetrical about the base <NUM>, of the pedestal <NUM> may both extend to form the auxiliary winding parts <NUM>, and the auxiliary coil <NUM> is wound around the auxiliary winding part <NUM> on each side. Thus, during welding, two sides of the inductance device may both be welded to a PCB by means of the auxiliary coils <NUM>, thus resulting in higher stability. The number of the auxiliary winding parts <NUM> and that of the auxiliary coils <NUM> may be adjusted according to the desired structural strength and the requirement of electrical connection. Usually, the number of the auxiliary winding parts <NUM> may be between <NUM> and <NUM>.

In this embodiment, each auxiliary coil <NUM> is typically wound around one auxiliary winding part <NUM> individually. However, it is not excluded in this embodiment that the auxiliary coils <NUM> are all wound around a plurality of auxiliary winding parts <NUM> on the same side of the base <NUM>. For example, two auxiliary winding parts <NUM> on the same side may be used as two support points for the auxiliary coil <NUM>, and an enameled wire is wound around the two auxiliary winding parts <NUM> to form a strip-shaped auxiliary coil <NUM>. Such an auxiliary coil <NUM> has a larger welding area with a PCB and thus may have more excellent structural stability and electrical stability. As a matter of course, in addition to the two auxiliary winding parts <NUM> as support points for winding, the auxiliary coil <NUM> may further include other auxiliary winding part <NUM> in the middle thereof to support in the middle. Thus, a single auxiliary coil <NUM> may be wound around two or more auxiliary winding parts <NUM>.

In addition, the enameled wire may be led from the surface <NUM> of one auxiliary winding part <NUM> to the surface <NUM> of another auxiliary winding part <NUM> or from the welding surface <NUM> of one auxiliary winding part <NUM> to the welding surface <NUM> of another auxiliary winding part <NUM>, and may also be led from the surface <NUM>/the welding surface <NUM> of one auxiliary winding part <NUM> to the surface <NUM>/the welding surface <NUM> of another auxiliary winding part <NUM>, thereby forming a single diagonal or cross structure. In addition to the structures described above, in some embodiments, an auxiliary winding part <NUM> may be lengthened and an enameled wire may be then wound around the lengthened auxiliary winding part <NUM> to form a strip-shaped auxiliary coil <NUM>.

When winding an enameled wire to form the main coil <NUM>, the input end and the output end of the main coil <NUM> are usually led out from two ends of the main coil <NUM>. The input end and the output end of the main coil <NUM> are required to extend from the main winding groove <NUM> to the auxiliary winding parts <NUM> for continuously winding the auxiliary coils <NUM>, and in the case that the input end or the output end of the main coil <NUM> is in a position near the lower end portion <NUM>, it is usually located in the fixing receptacle <NUM>. In this case, the input end or the output end needs to extend to the auxiliary winding part <NUM> after passing across the opening <NUM>, which leads to increased difficulty of winding.

Therefore, to facilitate the extending of the enameled wire from the main winding groove <NUM> to the auxiliary winding part <NUM>, as shown in <FIG>, a wire passing gap <NUM> is formed in the wall <NUM> of the fixing receptacle <NUM> in a position corresponding to the auxiliary winding part <NUM>, and the wire passing gap <NUM> extends to the opening <NUM> in the first direction a. Thus, each of the input end and the output end of the main coil <NUM> may pass through the wall <NUM> directly through the wire passing gap <NUM> without passing across the opening <NUM>, which reduces difficulty of winding.

For the convenience of manufacturing, the outer contour of the lower end portion <NUM> is formed into a circular shape. Accordingly, to match the lower end portion <NUM>, the inner contour of the fixing receptacle <NUM> is also formed into a circular shape. While such an outer contour is convenient to manufacture, it is easy to cause circumferential rotation of the lower end portion <NUM> around the center of the circular contour within the fixing receptacle <NUM>, resulting in loosening and even unwinding of the enameled wire or the coil. To avoid this, as shown in <FIG> and <FIG>, a circumferential limit piece <NUM> is disposed on the fixing receptacle <NUM>. Meanwhile, as shown in <FIG>, a circumferential limit matching piece <NUM> is disposed on the lower end portion <NUM>. The circumferential rotation of the lower end portion <NUM> around the above-mentioned center within the fixing receptacle <NUM> is limited by means of matching of the circumferential limit piece <NUM> and the circumferential limit matching piece <NUM>.

In this embodiment, the circumferential limit piece <NUM> and the circumferential limit matching piece <NUM> may have any structure that can limit the circumferential rotation, and this embodiment does not have any constraint or use restriction thereon. For example, the circumferential limit piece <NUM> may be a limit projection on the wall <NUM>, while the circumferential limit matching piece <NUM> may be a limit notch matching the limit projection. Alternatively, the structure of the circumferential limit piece <NUM> may be interchangeable with that of the circumferential limit matching piece <NUM>.

In this embodiment, the circumferential limit piece <NUM> may be extend to the opening <NUM> of the fixing receptacle <NUM> in the first direction a, while the circumferential limit matching piece <NUM> may extend through two sides of the lower end portion <NUM> also in the first direction a. Thus, when embedding the lower end portion <NUM> into the fixing receptacle <NUM>, the circumferential limit piece <NUM> and the circumferential limit matching piece <NUM> may also serve as guiding or positioning element, allowing for smoother embedding.

In this embodiment, a plurality of or a plurality of groups of circumferential limit pieces <NUM> (two shown in <FIG> and <FIG>) are circumferentially uniformly distributed on the fixing receptacle <NUM>, while a plurality of or a plurality of groups of circumferential limit matching pieces <NUM> are circumferentially uniformly distributed on the lower end portion <NUM> correspondingly to the circumferential limit pieces <NUM>. Since a plurality of or a plurality of groups of circumferential limit pieces <NUM> and circumferential limit matching pieces <NUM> are circumferentially distributed uniformly, the lower end portion <NUM> and the whole main winding portion <NUM> may be adjusted circumferentially in angle, so as to enable the input end and the output end of the main coil <NUM> to be aligned to the respective auxiliary winding parts <NUM>, respectively.

In this embodiment not in accordance with the invention, the outer contour of the lower end portion <NUM> and the inner contour of the fixing receptacle <NUM> may also be non-circular, such as square, triangular, pentagonal and semicircular, and even the cross section of the upper end portion <NUM> and the main body portion <NUM> of the main winding part may also be kept in the same configuration with the lower end portion <NUM>. In this case, the circumferential limit piece <NUM> and the circumferential limit matching piece <NUM> may be omitted from the main winding part <NUM>, or it may be construed that the circumferential limit piece <NUM> and the circumferential limit matching piece <NUM> have become a portion of the fixing receptacle <NUM> and a portion of the lower end portion <NUM>, respectively.

When the lower end portion <NUM> is embedded into the fixing receptacle <NUM>, the fixing receptacle <NUM> may be clamped with the lower end portion <NUM> such that the lower end portion <NUM> can be tightly connected to the fixing receptacle <NUM>. Any clamping structure that can realize detachable clamping may be disposed between the fixing receptacle <NUM> and the lower end portion <NUM>. For example, as shown in <FIG>, a clasp <NUM> may be disposed in the fixing receptacle <NUM>. When the lower end portion <NUM> is embedded into the fixing receptacle <NUM>, the clasp <NUM> may be clamped with the lower end portion <NUM>. A bayonet or other structure matching the clasp <NUM> may be disposed on the lower end portion <NUM>. Alternatively, no any additional structure is added, and the clasp <NUM> is directly clamped with the side, facing the upper end portion <NUM>, of the lower end portion <NUM> by spanning over the lower end portion <NUM> after the lower end portion <NUM> is embedded in the fixing receptacle <NUM>. In other embodiments, a clasp might also be disposed on the fixing receptacle <NUM>, while a bayonet or other matching structure might be disposed on the lower end portion <NUM>. These technical solutions can be implemented by a person skilled in the art according to this embodiment without any effect on the clamping effect.

In this embodiment, the depth (or height) of the fixing receptacle <NUM> might also have an impact on the overall performance of the inductance device. For example, to adapt to the surface mount production, an adsorption mechanism needs to be used when transferring the inductance device, and an adsorption surface easy to adsorb needs to be disposed on the inductance device. As shown in <FIG>, a side surface, facing away from the lower end portion <NUM>, of the upper end portion <NUM> is used as a flat adsorption surface <NUM> in this embodiment. In order not to affect the adsorption effect, the depth (or height) of the fixing receptacle <NUM> needs to be limited, so that the fixing receptacle <NUM> is not beyond the adsorption surface <NUM> when the lower end portion <NUM> is embedded into the fixing receptacle <NUM>.

In other cases than those described above, the inductance device provided in this embodiment is typically used in an electrical apparatus such as a luminaire. For example, when the inductance device is used in a luminaire, the luminaire typically includes a lamp, a light source module, and a driving module. The lamp typically includes a housing and a front cover. The light source module and the driving module are both disposed on the lamp and electrically connected to each other. The light source module typically includes merely a light source board and a light-emitting diode (LED) chip disposed on the light source board, and the driving module includes a driving board, and a series of components disposed on the driving board, one of which is an inductance device.

Due to limited space of the luminaire, the components are arranged compactly, and the inductance device is a magnetic component, which might interfere with the normal operation of other components. Therefore, to avoid interference with other components, the fixing receptacle <NUM> and even the whole pedestal <NUM> in this embodiment may be made of a magnetic shielding material such as a magnetic glue and a magnetic ferrite, and the depth (or height) of the fixing receptacle <NUM> is limited, so that the upper end portion <NUM> is not beyond the opening <NUM> when the lower end portion <NUM> is embedded into the fixing receptacle <NUM>. In other words, the main winding part <NUM> is completely enclosed by the fixing receptacle <NUM>. Since the fixing receptacle <NUM> is made of a magnetic shielding material, a magnetic field generated by the main winding part <NUM> and the main coil <NUM> can be effectively shielded from interference with other components.

In some luminaires, there might be a case where the light source board and the driving board are integrated. In this case, part of light rays emitted by the LED chip might be thrown on the inductance device. Usually, a magnetic material used for the inductance device has a deep color or even is black with extremely high light absorbance and low reflectance, thus leading to waste of a certain amount of light energy. In this embodiment, the surface of one or even both of the pedestal <NUM> and the main winding part <NUM> may be coated with a light color (e.g., white) to form a reflective surface, thereby providing higher light reflectance. The surface color of the pedestal <NUM> and the main winding part <NUM> may be provided by adjusting the material of the pedestal <NUM> or the main winding part <NUM>. Alternatively, the surface of the pedestal <NUM> and the main winding part <NUM> may be coated with a light color pigment.

For the convenience of production, in this embodiment, the upper end portion <NUM> and the lower end portion <NUM> may be structurally symmetrical about the main body portion <NUM>. Thus, the upper end portion <NUM> and the lower end portion <NUM> may be arbitrarily interchangeable in position to simplify the winding of the coil and the embedding of the main winding part <NUM>.

To sum up, the inductor skeleton structure, the inductance device and the luminaire provided in the embodiments of the present invention can be adaptable to the surface mount technology, thereby improving the assembly efficiency.

The foregoing description of each embodiment of the present invention focuses on the differences from other embodiment. Different optimized features of various embodiments can be combined to derive a better embodiment as long as they do not contradict each other, which will not be reiterated here in consideration of simplicity of wording.

Claim 1:
An inductor skeleton structure, comprising a pedestal (<NUM>) and a main winding part (<NUM>),
wherein the pedestal (<NUM>) comprises a base (<NUM>), a fixing part (<NUM>), and an auxiliary winding part (<NUM>), the fixing part (<NUM>) is disposed on the base (<NUM>), the base (<NUM>) comprises a downward fitting surface (<NUM>) and a circumferential side surface (<NUM>) surrounding the fitting surface (<NUM>), and the auxiliary winding part (<NUM>) is extended away from the base (<NUM>) from the side surface (<NUM>); wherein
the main winding part (<NUM>) has a main winding groove (<NUM>) for winding a main coil (<NUM>); wherein the main winding part (<NUM>) comprises an upper end portion (<NUM>), a lower end portion (<NUM>) and a main body portion (<NUM>), the main body portion (<NUM>) is between the upper end portion (<NUM>) and the lower end portion (<NUM>), and edges of both the upper end portion (<NUM>) and the lower end portion (<NUM>) are beyond the main body portion (<NUM>) and define together with the main body portion (<NUM>) the main winding groove (<NUM>); the main winding part (<NUM>) is fixed on a side, which is facing away from the fitting surface (<NUM>), of the base (<NUM>) by the fixing part (<NUM>); a downward surface of the auxiliary winding part (<NUM>) is a welding surface (<NUM>), and the auxiliary winding part (<NUM>) is used for winding an auxiliary coil (<NUM>) capable of covering at least a portion of the welding surface (<NUM>); and
the fixing part (<NUM>) is a fixing receptacle (<NUM>), wherein an inner contour of the fixing receptacle (<NUM>) and an outer contour of the lower end portion (<NUM>) are both in a circular shape, a circumferential limit piece (<NUM>) is disposed on the fixing receptacle (<NUM>), and a circumferential limit matching piece (<NUM>) is disposed on the lower end portion (<NUM>); and the lower end portion (<NUM>) and the fixing receptacle (<NUM>) are capable of being limited from rotation around a center of the circular shape by matching of the circumferential limit piece (<NUM>) and the circumferential limit matching piece (<NUM>).