CN210606872U

CN210606872U - Toroidal inductor

Info

Publication number: CN210606872U
Application number: CN201921711476.0U
Authority: CN
Inventors: 林健明; 潘立总; 黄巧丽
Original assignee: Zhuhai Liming Yunlu New Energy Technology Co ltd
Current assignee: Zhuhai Liming Yunlu New Energy Technology Co ltd
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2020-05-22
Anticipated expiration: 2029-10-12

Abstract

The utility model relates to an inductor technical field discloses an annular inductor, can improve annular inductor's stability and reliability. The utility model discloses a base, integrated into one piece and the cross-section that are equipped with the arc wall are circular shape annular magnetic core, a plurality of arrange in proper order in arc wall spacing portion all around, at least a pair of pin slotted hole and at least a set of coiling coil winding on annular magnetic core of locating on spacing portion and/or arc wall and/or base. The utility model adopts the annular magnetic core with the circular cross section and integrated molding, which not only can improve the inductance stability of the magnetic core, but also can maximize the cross section area of the magnetic core under the same size, thereby effectively improving the bias inductance under the rated current; in addition, cooperation arc wall and spacing portion can fix a position and fix annular magnetic core and coil winding, not only can promote the packaging efficiency, can prevent moreover that the skew condition from appearing in toroidal inductor, has improved toroidal inductor's reliability effectively.

Description

Toroidal inductor

Technical Field

The utility model relates to an inductor technical field, especially an annular inductor.

Background

At present, a circular inductor is formed by assembling a cut loop magnetic core and a vertically wound square flat coil, so that the magnetic core needs to be subjected to glue dispensing and fixing after the assembly, the production operation mode has low efficiency, and the tightness of the seam of the magnetic core cannot be ensured, so that the inductance stability of the magnetic core is poor, and the product quality is reduced; and the annular inductor lacks effectual fixed knot structure, leads to the annular inductor to appear crooked when cartridge PCB board easily, very easily leads to the problem that the pin misplaces or can not go out, makes whole production efficiency low.

Disclosure of Invention

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a toroidal inductor can improve toroidal inductor's stability and reliability.

According to the utility model discloses toroidal inductor, include: the base is provided with an arc-shaped groove; the cross section of the integrally formed annular magnetic core is circular, and the bottom of the integrally formed annular magnetic core is arranged on the arc-shaped groove; the limiting parts are used for positioning the positions of the annular magnetic cores and are sequentially distributed around the arc-shaped groove; at least one pair of pin slotted holes are arranged on the limiting part and/or the arc-shaped groove and/or the base; and the coil windings are wound on the annular magnetic core, and pins are inserted into the corresponding pair of pin slot holes.

According to the utility model discloses toroidal inductor has following beneficial effect at least: the circular magnetic core with the circular cross section and formed integrally is adopted, so that the inductance stability of the magnetic core is improved, the cross section area of the magnetic core is maximized under the same size, and the bias inductance under the rated current is effectively improved; in addition, the annular magnetic core and the coil winding can be positioned and fixed by matching the arc-shaped groove and the limiting part, so that the assembly efficiency can be improved, the condition that the annular magnetic core and the coil winding are deviated can be prevented, and the reliability of the annular inductor is effectively improved; and meanwhile, the matching performance of the pins of the annular inductor and the assembled PCB can be improved by matching with the pin slots, and the production efficiency is effectively improved.

According to some embodiments of the invention, the limiting portion is an upwardly protruding boss. The boss protruding upwards is adopted, the periphery of the annular magnetic core and the coil winding can be effectively limited, and the condition that the annular magnetic core and the coil winding are deviated is prevented.

According to the utility model discloses a some embodiments, spacing portion is equipped with four, is first spacing portion, second spacing portion, third spacing portion and fourth spacing portion respectively, first spacing portion the second spacing portion the third spacing portion and the fourth spacing portion arranges in proper order arc wall around. The four limiting parts are arranged, the annular magnetic core can be limited in the front, the back, the left and the right, the assembly efficiency of the annular inductor can be effectively improved, and the condition that the annular magnetic core and the coil winding are deviated can be prevented.

According to some embodiments of the utility model, the second spacing portion with be equipped with the arcwall face in the spacing portion of fourth and respectively with the both ends pitch arc of arc wall fuses. Utilize the arcwall face, can make the radian of the spacing portion of second and the spacing portion cooperation annular magnetic core of fourth, can avoid spacing portion to cause the damage and reach effectual spacing effect to annular magnetic core.

According to some embodiments of the present invention, the upper end of the pin slot hole is provided with a trumpet-shaped opening, and the opening faces the inner side of the arc-shaped groove. Adopt the opening of loudspeaker form, can be convenient for location and the installation of coil winding's pin, the opening inclines towards the arc wall inboard simultaneously, can avoid the condition that the colloid outflows when the point is glued.

According to some embodiments of the invention, the arc-shaped groove is provided with a plurality of protrusions on both sides. The solenoid formed by the annular magnetic core and the coil winding has a certain distance with the groove surface of the arc-shaped groove, the distance interval can be reduced by arranging the plurality of convex parts, the solenoid and the arc-shaped groove can be bonded more quickly and more stably when glue dispensing is facilitated, and the situation that the solenoid cannot be attached tightly due to the overlarge gap between the solenoid and the arc-shaped groove is avoided.

According to some embodiments of the utility model, it is a plurality of the upper end of convex part is equipped with the inclined plane, the inclined plane all towards the arc wall. Set up the inclined plane, can make the outer cambered surface of inclined plane and annular magnetic core cooperate, make the boss press close to with the outside of the solenoid that annular magnetic core and coil winding formed.

According to some embodiments of the present invention, the bottom of the base is further provided with a reinforcing rib. The reinforcing ribs are additionally arranged, so that the reliability of the base can be improved, and the base is not easy to deform.

According to some embodiments of the invention, the coil winding is a flat coil. By adopting the flat coil, the contact area of the coil winding and air can be increased, and the heat dissipation effect is effectively improved.

According to some embodiments of the present invention, the base and the limiting portion are an integrally formed structure. The structure of the integrated forming is adopted, the integral reliability can be improved, the base and the limiting part can be directly formed by the same die, and the production efficiency is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural view of a preferred embodiment of the present invention;

fig. 2 is a schematic structural view of a preferred embodiment of the present invention in which coil windings are wound on a toroidal core;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic structural view of a base according to a preferred embodiment of the present invention;

FIG. 5 is a front view of the base of a preferred embodiment of the present invention;

FIG. 6 is a top view of the base of a preferred embodiment of the present invention;

fig. 7 is a bottom view of the base of a preferred embodiment of the present invention.

Reference numerals: the coil winding comprises a base 100, an arc-shaped groove 110, a convex part 120, a reinforcing rib 130, an annular magnetic core 200, a limiting part 300, a first limiting part 310, a second limiting part 320, a third limiting part 330, a fourth limiting part 340, an arc-shaped surface 350, a pin slot 400, an opening 410 and a coil winding 500.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If there is a description of the first, second, third and fourth only for the purpose of distinguishing between technical features, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 4, a preferred embodiment of the present invention is a toroidal inductor, comprising: a base 100 provided with an arc-shaped groove 110; an integrally formed annular magnetic core 200, the cross section of which is circular and the bottom of which is arranged on the arc-shaped groove 110; four limiting parts 300 are provided for positioning the positions of the annular magnetic cores 200 and are sequentially arranged around the arc-shaped groove 110; a pair of pin slots 400 formed in the limiting portion 300; and a set of coil windings 500 wound on the annular magnetic core 200 and having pins inserted in the corresponding pin slots 400.

In some embodiments of the present invention (not shown), it is conceivable that if two pairs of pin slots 400 are provided, the other pair can be further disposed on the arc-shaped groove 110 or the base 300, and the two pairs of pin slots 400 can be further disposed on the limiting portion 300 or the pin slots 400 or the arc-shaped groove simultaneously as required, i.e. the logarithm or the position of the pin slots 400 can be selected according to the setting requirement.

Referring to fig. 1-3, in some embodiments of the present invention, the coil winding 500 is a pancake coil. By adopting the flat coil, the contact area of the coil winding 500 and air can be increased, and the heat dissipation effect is effectively improved. In this embodiment, one coil winding 500 is adopted, and it is conceivable that two coil windings 500 may be provided according to the design of the toroidal inductor to form a common mode inductor. Two pairs of pin slots 400 are required to be simultaneously arranged, and the positions of the pin slots 400 are determined according to the winding manner of the two sets of coil windings 500.

The annular magnetic core 200 which is circular in cross section and integrally formed is adopted, so that not only can the inductance stability of the magnetic core be improved, but also the cross section area of the magnetic core can be maximized under the same size, and the bias inductance under the rated current is effectively improved; in addition, the annular magnetic core 200 and the coil winding 500 can be positioned and fixed by matching the arc-shaped groove 110 and the limiting part 300, so that the assembly efficiency can be improved, the condition that the annular magnetic core 200 and the coil winding 500 deviate can be prevented, and the reliability of the annular inductor is effectively improved; meanwhile, the matching performance of the pins of the annular inductor and the assembled PCB can be improved by matching with the pin slot holes 400, and the production efficiency is effectively improved.

Referring to fig. 1, 4 and 5, in some embodiments of the present invention, the limiting portion 300 is an upwardly protruding boss. The convex platforms protruding upwards are adopted, the peripheries of the annular magnetic core 200 and the coil winding 500 can be effectively limited and clamped, and the condition that the annular magnetic core 200 and the coil winding 500 deviate is prevented. It is conceivable that vertical panels may be used for the limiting portion 300, and a corresponding number of panels are set according to the sizes of the annular magnetic core 200 and the base 100 and are sequentially arranged around the arc-shaped groove 110 to limit the annular magnetic core 200 and the coil winding 500.

Referring to fig. 1, 4 and 5, in some embodiments of the present invention, four limiting portions 300 are provided, which are a first limiting portion 310, a second limiting portion 320, a third limiting portion 330 and a fourth limiting portion 340, and the first limiting portion 310, the second limiting portion 320, the third limiting portion 330 and the fourth limiting portion 340 are sequentially arranged around the arc-shaped groove 110. The four limit portions 300 are provided to limit and clamp the toroidal core 200 in the front, rear, left, and right directions, thereby effectively improving the assembly efficiency of the toroidal inductor and preventing the toroidal core 200 and the coil winding 500 from being deviated.

Referring to fig. 1, 4 and 5, in some embodiments of the present invention, the second limiting portion 320 and the fourth limiting portion 340 are provided with arc-shaped surfaces 350 respectively connected with two end arcs of the arc-shaped groove 110. That is, two ends of the arc-shaped groove 110 respectively form an integral arc-shaped angle with the arc-shaped surfaces 350 of the second limiting portion 320 and the fourth limiting portion 340. By utilizing the arc-shaped surface 350, the second limiting part 320 and the fourth limiting part 340 can be matched with the radian of the annular magnetic core 200, so that the annular magnetic core 200 is prevented from being damaged by the limiting part 300 and an effective limiting effect is achieved. The spacing portion 300 may be provided with a greater number or a smaller number to space the annular magnetic core 200 and the coil according to the size of the annular magnetic core 200 and the base 100; if being applied to the great toroidal inductor of size, think that can separate into the first spacing portion 310 and the third spacing portion 330 that are located the arc wall 110 front and back side into a plurality of volumes smaller first spacing portions 310 and third spacing portions 330 to arrange respectively in proper order on the front and back side of arc wall 110, can improve the bottom ventilation effect of the solenoid that loop coil and coil winding 500 constitute like this, can be better than the air circulation effect of the first spacing portion 310 of integral type and third spacing portion 330 promptly, so not only can play spacing effect, still can further improve the radiating effect of solenoid simultaneously.

Referring to fig. 4, 6 and 7, in some embodiments of the present invention, the upper end of the pin slot 400 is provided with a trumpet-shaped opening 410, and the opening 410 is inclined toward the inner side of the arc-shaped slot 110. The horn-shaped opening 410 is adopted, so that the positioning and the installation of the pins of the coil winding 500 can be facilitated, and meanwhile, the opening 410 inclines towards the inner side of the arc-shaped groove 110, so that the condition that the glue flows out during glue dispensing can be avoided. It is conceivable that the positions of the pair of pin slots 400 are set according to the winding manner of the coil winding 500 and the positions of the position-limiting portions 300, and the pin slots 400 are disposed at corresponding positions, for example, in this embodiment, only one set of the coil winding 500 is provided, and a pair of pins are respectively led out from the front and rear sides of the bottom of the annular magnetic core 200, so that the pin slots 400 are respectively disposed on the first position-limiting portion 310 and the third position-limiting portion 330. It is conceivable that the pin slot 400 may be directly disposed on the arc-shaped slot 110 or at the peripheral position of the base 100 according to the design requirement of the toroidal inductor, the pin slot 400 is mainly used for fixing the pins of the coil winding 500, and the position of the pin slot 400 may be changed according to the winding manner of the coil winding 500, i.e., the final pin extending position.

Referring to fig. 4 and 6, in some embodiments of the present invention, a plurality of protrusions 120 are disposed on both sides of the arc-shaped groove 110. The coil formed by the annular magnetic core 200 and the coil winding 500 has a certain distance with the groove surface of the arc-shaped groove 110, and the distance interval can be reduced by arranging the plurality of convex parts 120, so that the coil can be bonded with the arc-shaped groove 110 more quickly and stably during dispensing, and the situation that the coil cannot be attached tightly due to the overlarge gap between the coil and the arc-shaped groove 110 is avoided. It is conceivable that the number of the convex portions 120 may be designed according to the volume of the convex portions 120 and the radian of the arc-shaped groove 110, and as in the present embodiment, six convex portions 120 are respectively disposed on the front and rear sides of the arc-shaped groove 110.

Referring to fig. 4 and 6, in some embodiments of the present invention, the upper ends of the plurality of protrusions 120 are provided with inclined surfaces, each facing the arc-shaped groove 110. The inclined plane is arranged, so that the inclined plane is matched with the outer arc surface of the annular magnetic core 200, and the boss can be close to the outside of a coil formed by the annular magnetic core 200 and the coil winding 500. It is contemplated that the chamfer could be modified to a curved configuration.

Referring to fig. 7, in some embodiments of the present invention, the bottom of the base 100 is further provided with a reinforcing rib 130. The reinforcing ribs 130 are additionally arranged, so that the reliability of the base 100 can be improved, and the base 100 is not easy to deform.

Referring to fig. 4 to 6, in some embodiments of the present invention, the base 100 and the position-limiting portion 300 are integrally formed. That is, the first position-limiting portion 310, the second position-limiting portion 320, the third position-limiting portion 330 and the fourth position-limiting portion 340 are integrally formed with the base 100. The structure of the integrated molding can improve the reliability of the whole, and the base 100 and the limiting part 300 can be directly molded by the same mold, thereby improving the production efficiency. It is conceivable that the protrusion 120 and the base 100 may be integrally formed, and the base 100, the arc-shaped groove 110, the limiting portion 300, and the protrusion 120 are formed at the same time by using the same mold, so that the production efficiency of the toroidal inductor can be effectively improved.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A toroidal inductor, comprising:

the base is provided with an arc-shaped groove;

the cross section of the integrally formed annular magnetic core is circular, and the bottom of the integrally formed annular magnetic core is arranged on the arc-shaped groove;

the limiting parts are used for positioning the positions of the annular magnetic cores and are sequentially distributed around the arc-shaped groove;

at least one pair of pin slotted holes are arranged on the limiting part and/or the arc-shaped groove and/or the base;

and the coil windings are wound on the annular magnetic core, and pins are inserted into the corresponding pair of pin slot holes.

2. The toroidal inductor of claim 1, wherein: the limiting part is an upward protruding boss.

3. The toroidal inductor according to claim 1 or 2, wherein: the limiting parts are four, namely a first limiting part, a second limiting part, a third limiting part and a fourth limiting part, and the first limiting part, the second limiting part, the third limiting part and the fourth limiting part are sequentially arranged around the arc-shaped groove.

4. The toroidal inductor of claim 3, wherein: the second limiting part and the fourth limiting part are provided with arc-shaped surfaces and are respectively connected with two end arcs of the arc-shaped groove into a whole.

5. The toroidal inductor of claim 1, wherein: the upper end of the pin slotted hole is provided with a horn-shaped opening, and the opening inclines towards the inner side of the arc-shaped groove.

6. The toroidal inductor of claim 1, wherein: a plurality of convex parts are arranged on two sides of the arc-shaped groove.

7. The toroidal inductor of claim 6, wherein: the upper ends of the convex parts are provided with inclined planes, and the inclined planes face the arc-shaped grooves.

8. The toroidal inductor of claim 1, wherein: the bottom of the base is also provided with a reinforcing rib.

9. The toroidal inductor of claim 1, wherein: the coil winding is a flat coil.

10. The toroidal inductor of claim 1, wherein: the base and the limiting part are of an integrally formed structure.