CN221262093U - Integrated into one piece inductance coil assembly - Google Patents

Abstract

The utility model discloses an integrated inductor coil assembly, which comprises a terminal row and a coil, wherein a welding part welded with a coil lead is arranged on the terminal row, protruding parts are respectively arranged on two sides of the welding part, the protruding parts are bent towards the same side of the welding part to form a flange, the flange and the welding part positioned in the middle form a groove-shaped structure, the protruding parts are in a triangular structure, the protruding parts are provided with a second edge and a third edge, the second edge is formed by extending outwards from a first edge on the end part of the welding part, the third edge is connected with one end of the second edge and the side edge of the welding part, and when the leads at two ends of the coil and the welding part of the terminal row are welded, the flanges formed by bending the two protruding parts can enable welding materials to be piled up in the groove-shaped structure, so that the welding strength is increased, and the lead is effectively prevented from falling off.

Description

Integrated into one piece inductance coil assembly

Technical Field

The utility model relates to an electronic element, in particular to an integrally formed inductance coil assembly.

Background

The integrated inductor is a power inductor composed of a coil, a metal terminal and a powder-molded magnet. Wherein the coil and the metal terminal are connected and conducted through welding. At present, the welding of the coil and the terminal is commonly realized by adopting a laser welding technology/spot welding and a laser welding technology in the market. The technology can not solve the problems of the loose bonding between the lead and the terminal and the fixed lead position in the welding process, and further can not fundamentally solve the problems of insufficient welding spot strength and open circuit.

Disclosure of utility model

The present utility model is directed to an integrally formed inductor assembly, which solves the above-mentioned problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The utility model provides an integrated into one piece inductance coil assembly, includes terminal bar and coil, be provided with on the terminal bar with coil lead wire welded welding portion, the both sides of welding portion are provided with the bulge respectively, and the bulge is buckled in order to form the flange to the homonymy of welding portion, makes flange and the welding portion that is located the centre form a slot-like structure.

As a further scheme of the utility model: at least two protruding parts are arranged, and at least two protruding parts are respectively positioned at two sides of the welding part.

As a further scheme of the utility model: the shape of the protruding portion is triangular, the protruding portion is provided with a second edge and a third edge, the second edge is formed by extending outwards from a first edge on the end portion of the welding portion, the third edge is connected with one end of the second edge and the side edge of the welding portion, and a first vertex angle is formed at the junction of the second edge and the third edge.

As a further scheme of the utility model: the flange meets the following conditions: a is less than 2D,0.5D is less than B,0.1mm is less than or equal to D is less than or equal to 1mm,0 DEG is less than or equal to |a| is less than or equal to 90 DEG; wherein A represents the interval between two flange, B is the flange height, D is the diameter of lead wire, and a is the contained angle that two flange become each other.

As a further scheme of the utility model: the terminal strip further comprises two parallel terminal material strips, the two terminal material strips are fixed through a connecting part, at least one pair of welding terminals are arranged on the inner sides of the two terminal material strips, and the welding parts are formed on the welding terminals.

As a further scheme of the utility model: the pair of welding terminals are symmetrically distributed, a space for the coil to pass through is formed between the pair of welding terminals, and the coil passes through the space.

As a further scheme of the utility model: the welding terminal further comprises a vertical rod part and a transition part, one end of the vertical rod part is fixedly connected with the terminal material belt, the other end of the vertical rod part extends outwards along two second vertex angles of the vertical rod part to form the transition part, and the end part of the transition part extends outwards along the parallel direction of the terminal material belt to form the welding part, so that the vertical rod part, the transition part and the welding part are of a Y-shaped structure.

As a further scheme of the utility model: and the welding terminal is provided with a through hole for fixing the terminal strip.

As a further scheme of the utility model: the connecting parts are provided with a plurality of pairs of welding terminals, and the connecting parts and the pairs of welding terminals are alternately distributed.

As a further scheme of the utility model: the connecting part is of a thin and narrow metal strip structure and is vertically fixed between the two terminal material strips.

Compared with the prior art, the utility model has the beneficial effects that:

According to the integrated inductor coil assembly, the welding parts welded with the coil leads are arranged on the terminal bars, the protruding parts are respectively arranged on two sides of the welding parts, and the two protruding parts are bent towards the same sides of the welding parts to form the flanges, so that the flanges and the welding parts positioned in the middle form a groove-shaped structure, and when the leads at two ends of the coil are welded with the welding parts of the terminal bars, the flanges formed by bending the two protruding parts can enable solder to be piled up in the groove-shaped structure, so that the welding strength is increased, and the lead is effectively prevented from falling off.

Drawings

FIG. 1 is a schematic diagram of an integrally formed inductor assembly;

FIG. 2 is a schematic diagram of the welding of a coil and a terminal strip in an integrally formed inductor coil assembly;

FIG. 3 is an enlarged view of a portion of an integrally formed inductor coil assembly;

FIG. 4 is a schematic diagram of a weld terminal in an integrally formed inductor coil assembly;

FIG. 5 is a schematic illustration of bending of a protrusion in a weld terminal in an integrally formed inductor coil assembly;

Fig. 6 is a front view of a bent state of a protrusion in an integrally formed inductor coil assembly;

FIG. 7 is a schematic diagram of a coil and terminal strip welding in another embodiment;

FIG. 8 is a schematic diagram showing the welding effect of the coil and the welding portion in another embodiment;

In the figure: the terminal strip 1, the terminal strip 2, the first terminal strip 2a, the second terminal strip 2b, the welding terminal 3, the first welding terminal 3a, the second welding terminal 3b, the welding part 31, the first edge 31a, the vertical rod part 32, the transition part 33, the protruding part 34, the second edge 34a, the third edge 34b, the first vertex angle 34c, the connecting part 4, the coil 5, the lead wire 51, the lead wire positioning seat 6, the coil bearing base 7 and the solder 8.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 3, in an embodiment of the present utility model, an integrally formed inductor coil assembly includes a terminal strip 1 and a coil 5, at least two protruding portions 34 are respectively disposed at two sides of a welding portion 31 of the terminal strip 1, and the at least two protruding portions 34 can be bent toward the same side of the welding portion 31, so that a certain angle is formed between the protruding portions 34 and the welding portion 31, and a flange is formed between the protruding portions 34 and the welding portion 31, so that the two flanges and the welding portion 31 located in the middle form a groove-shaped structure, and when the leads 51 at two ends of the coil 5 are welded with the welding portion 31 of the terminal strip 1, the flanges formed by bending the two protruding portions 34 can enable the solder 8 to be stacked in the groove-shaped structure, thereby increasing welding strength and further effectively preventing the leads 51 from falling off. In the present embodiment, two protruding portions 34 are provided, and the two protruding portions 34 are respectively provided at both sides of the welding portion 31 to form a groove-like structure; in other embodiments, the protrusions 34 may be provided in an even number of four, six, etc. depending on the welding length.

Referring to fig. 1 and 2, the integrated inductor 5 assembly includes at least one terminal strip 1 for connecting both ends of the coil 5, the terminal strip 1 is integrally formed in a sheet-like structure, and includes two terminal strips 2 parallel to each other and arranged laterally, i.e., a first terminal strip 2a and a second terminal strip 2b, the first terminal strip 2a and the second terminal strip 2b are parallel to each other and arranged laterally (left-right direction shown in fig. 1), the two terminal strips 2 are fixedly connected by a connecting portion 4, at least one pair of welding terminals 3 (the two welding terminals 3 are characterized as a pair) are fixedly provided on opposite inner sides of the two terminal strips 2, respectively, the pair of welding terminals 3 includes a first welding terminal 3a and a second welding terminal 3b for welding two leads 51 respectively led out from both ends of the coil 5, and the two welding terminals 3 are identical in structure and are preferably arranged symmetrically. The terminal strip 1 may be made of a sheet-like conductive metal sheet as a base material and manufactured by integral die cutting to obtain an integrally molded structure of the terminal strip 2, the solder terminal 3 and the connecting portion 4.

In some embodiments, the terminal strip 2 is a straight strip-shaped metal strip body with a plurality of through holes punched thereon for bolts to pass through to fix the terminal strip 1. When the terminal strip 1 is assembled, the terminal strip 1 is placed on a corresponding insulating base (not shown in the figure) on the inductor, the through holes on the terminal strip 1 are aligned with the threaded holes on the base, and then the bolts penetrate through the through holes and are locked in the threaded holes of the base, so that the whole terminal strip 1 and the base are fixed. This method is only one fixing method of the terminal strip 1, and may be implemented by other fixing methods such as fastening and fixing, and embedded fixing, according to actual needs.

The welding terminals 3 are portions led out from the terminal material tape 2, and are used for welding leads 51 led out from both ends of the coil 5, and at least one pair of the welding terminals 3 is provided, and in this embodiment, four pairs of the welding terminals 3 are provided, each pair of the welding terminals 3 corresponds to one coil 5. The two welding terminals 3 of the same pair are symmetrically distributed, and a space is reserved between the two welding terminals, and the space is used for accommodating the coil 5, so that the coil 5 and the two welding terminals 3 keep the shortest distance, and leads 51 led out from two ends of the coil 5 are in contact with the welding parts 31 on the welding terminals 3 at the shortest distance, thereby avoiding the extra wiring of the coil 5 and improving the integrity of products.

In some embodiments, the connection portions 4 are formed in a thin and narrow metal strip structure, the connection portions 4 are vertically fixed between the two terminal strips 2, and in the case where the connection portions 4 are provided with a plurality of and the welding terminals 3 are provided with a plurality of pairs, the connection portions 4 are alternately distributed with the pairs of welding terminals 3.

In this embodiment, the integrally formed inductor 5 further includes a coil 5, where the coil 5 is electrically connected to the terminal block 1, specifically, the coil 5 is a cylindrical coil 5 formed by winding a wire (for example, an enamel wire) wrapped with an insulating sheath, and two ends of the coil 5 respectively draw out leads 51 for welding with the welding terminals 3 of the terminal block 1.

Referring to fig. 2, fig. 2 shows a schematic welding diagram of the coil 5 and the terminal strip 1 in the integrated inductor coil 5 assembly according to the present utility model, and the welding process is as follows, and it should be noted that the laser welding is used here for illustration, and other welding means may be used according to practical situations. Before laser welding, the coil 5 is placed on the coil bearing base 7, two leads 51 extending on the same side and approximately parallel to each other are led out of the coil 5, the two leads 51 extend forwards and are erected in positioning grooves of the lead positioning base 6, the terminal strip 1 is placed at a corresponding position of the coil 5, the coil 5 passes through a pair of welding terminals 3, and a terminal cover (not shown in the figure) is arranged above the leads 51 of the coil 5 and is used for fixing the coil 5 and the leads 51; the pressing plate (not shown in the figure) of the terminal material belt 2 presses the terminal material belt 2 downwards to cling to the coil bearing base 7, and the lead wires 51 slide to the bottom along the groove walls of the positioning grooves of the lead wire positioning base 6 along with the pressing plate of the terminal material belt 2, so that the welding parts 31 on the two welding terminals 3 positioned on two sides of the coil 5 cling to the two lead wires 51 respectively. Then directly starting the laser or spot welding part 31 to tightly attach the lead 51 to the welding part 31, and finally starting the laser to heat and melt the welding terminal 3 and the lead 51 at the boundary between the lead 51 and the edge of the welding part 31 so as to achieve fusion welding and fuse the redundant wire head ends of the lead 51. Through the arrangement, the coil 5 and the welding terminal 3 are reasonably distributed, the lead-out length of the lead 51 and extra wiring are reduced, and the product integrity is improved.

Referring to fig. 4, fig. 4 shows a welding terminal 3 in another preferred embodiment, the welding terminal 3 has a Y-shaped structure as a whole, and includes a vertical rod portion 32, a transition portion 33 and the welding portion 31, wherein one end of the vertical rod portion 32 is fixedly connected with the terminal strip 2, the other end extends outwards along two second vertex angles thereof to form the transition portion 33, and an end of the transition portion 33 extends outwards along a parallel direction of the terminal strip 2 to form the welding portion 31, so that the vertical rod portion 32, the transition portion 33 and the welding portion 31 have a Y-shaped structure as a whole, and the welding portion 31 is a portion directly acting on the lead wire 51 and being welded with the lead wire 51.

The two sides of the welding part 31 are respectively provided with a protruding part 34, the two protruding parts 34 can bend along the same side of the joint of the two protruding parts 34 and the welding part 31, and the protruding parts 34 are bent to form two flanges positioned on the two sides of the welding part 31, so that the two flanges and the welding part 31 positioned between the two flanges jointly form a groove-shaped structure. Referring to fig. 7 and 8, the function of the arrangement is that the flanges on both sides of the bonding pad portion perform a certain guiding and positioning function on the lead wire 51 before bonding, so as to prevent the lead wire 51 from extending outwards and departing from the coverage area of the bonding pad 31, thereby improving the consistency of the position of the lead wire 51 on the bonding pad and performing a good positioning function; in the welding process, flanges on two sides of the welding part 31 are not completely melted, so that a certain blocking effect is achieved on the fused lead 51, and the lead 51 is prevented from deviating from the welding part 31 due to stress rebound; after soldering, the flanges on both sides of the soldering portion 31 are partially melted as the solder 8, and the solder 8 is wrapped, so that the amount of the solder 8 is appropriately increased, the solder 8 is deposited in the groove-like structure formed by the two flanges and the soldering portion 31, the lead 51 is sufficiently wrapped with the solder 8, and the solder joint strength is further improved.

Referring again to fig. 4, in some embodiments, the shape of the protrusion 34 may be configured as a square, rectangle, arc, or triangle, in this embodiment, the protrusion 34 is configured as a triangle, i.e., the protrusion 34 has a second edge 34a and a third edge 34b, wherein the second edge 34a is formed as a straight edge, the second edge 34a is formed by extending the first edge 31a on the end of the weld 31 outward such that the second edge 34a is collinear with the first edge 31a, the third edge 34b connects one end of the second edge 34a and the side edge of the weld 31 such that the third edge 34b forms a hypotenuse, and such that the second edge 34a and the third edge 34b and the side edge of the weld 31 collectively enclose the triangular protrusion 34, and the intersection of the second edge 34a and the third edge 34b of the protrusion 34 forms a first apex angle 34c. Referring to fig. 8, after the soldering portion 31 is soldered to the lead 51, the flange formed by the protruding portion 34 wraps the solder 8, and the first apex angle 34c of the protruding portion 34 is in an unmelted state and supports and blocks the solder 8, thereby further improving soldering firmness.

Referring to fig. 5-6, the two flanges formed by bending the protrusion 34 are designed to meet the following conditions, and the design principle is as follows: a is less than 2D,0.5D is less than B,0.1mm is less than or equal to D is less than or equal to 1mm,0 DEG is less than or equal to |a| is less than or equal to 90 DEG; wherein, A is characterized by the interval between two flanges, B is the flange height, C is the flange length, D is the diameter of the lead wire 51, and a is the included angle formed by the two flanges: because the flanges at both sides show an included angle within 90 degrees, the terminal material strip 2 has a certain guiding function on the lead 51 when being assembled with the coil 5, so that the lead 51 falls into the welding part 31.

Referring to fig. 7, fig. 7 is a schematic diagram illustrating an assembly of the terminal block 1 with the protruding portion 34 and the coil 5, before laser welding, the coil 5 is placed on the coil carrying base 7, two wires 51 extending on the same side and approximately parallel to each other are led out of the coil 5, the two wires 51 extend forward and are set up in the positioning slots of the wire positioning base 6, the terminal block 1 is placed at a corresponding position of the coil 5, so that the coil 5 passes between a pair of welding terminals 3, and a terminal cover (not shown in the figure) is above the wires 51 of the coil 5 for fixing the coil 5 and the wires 51; the terminal material belt 2 pressing plate (not shown in the figure) presses down the terminal material belt 2 to tightly cling to the coil bearing base 7, the lead wire 51 slides down to the bottom along the groove wall of the positioning groove of the lead wire positioning seat 6 along with the pressing plate of the terminal material belt 2, the welding parts 31 on the two welding terminals 3 positioned on the two sides of the coil 5 are respectively cling to the two lead wires 51, the protruding parts 34 on the two sides of the welding parts 31 are downwards bent to form two symmetrical flanges, the flanges limit the lead wires 51 in the welding parts 31, then a laser or spot welding area is directly started to tightly attach the lead wires 51 to the welding parts 31, finally the laser is started to heat and melt the flanges at the boundary between the lead wires 51 and the edges of the welding parts 31, the flanges are partially melted and form the solder 8, the solder 8 is piled in the groove-shaped structure, so that the quantity of the solder 8 is increased, the sufficient solder 8 fully wraps the lead wires 51, the welding strength is improved, the first vertex angle 34c of the flanges is not melted, the solder 8 is blocked and reinforced, the redundant wire ends of the lead wires 51 are melted, and the welding process is completed. Through the arrangement, the coil 5 and the welding terminal 3 are reasonably distributed, the lead-out length of the lead wire 51 and extra wiring are reduced, the product integrity is improved, the welding strength is greatly enhanced, and the lead wire 51 is prevented from falling off.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims (10)

1. An integrated into one piece inductance coil assembly, includes terminal strip and coil, its characterized in that: the terminal strip is provided with a welding part welded with the coil lead, two sides of the welding part are respectively provided with a protruding part, and the protruding parts are bent towards the same side of the welding part to form a flange, so that the flange and the welding part in the middle form a groove-shaped structure.

2. The integrally formed inductor coil assembly of claim 1, wherein: at least two protruding parts are arranged, and at least two protruding parts are respectively positioned at two sides of the welding part.

3. The integrally formed inductor coil assembly of claim 1, wherein: the shape of the protruding portion is triangular, the protruding portion is provided with a second edge and a third edge, the second edge is formed by extending outwards from a first edge on the end portion of the welding portion, the third edge is connected with one end of the second edge and the side edge of the welding portion, and a first vertex angle is formed at the junction of the second edge and the third edge.

4. The integrally formed inductor coil assembly of claim 1, wherein: the flange meets the following conditions: a is less than 2D,0.5D is less than B,0.1mm is less than or equal to D is less than or equal to 1mm,0 DEG is less than or equal to |a| is less than or equal to 90 DEG; wherein A represents the interval between two flange, B is the flange height, D is the diameter of lead wire, and a is the contained angle that two flange become each other.

5. The integrally formed inductor assembly according to any one of claims 1-4, wherein: the terminal strip further comprises two parallel terminal material strips, the two terminal material strips are fixed through a connecting part, at least one pair of welding terminals are arranged on the inner sides of the two terminal material strips, and the welding parts are formed on the welding terminals.

6. The integrally formed inductor coil assembly of claim 5, wherein: the pair of welding terminals are symmetrically distributed, a space for the coil to pass through is formed between the pair of welding terminals, and the coil passes through the space.

7. The integrally formed inductor coil assembly of claim 5, wherein: the welding terminal further comprises a vertical rod part and a transition part, one end of the vertical rod part is fixedly connected with the terminal material belt, the other end of the vertical rod part extends outwards along two second vertex angles of the vertical rod part to form the transition part, and the end part of the transition part extends outwards along the parallel direction of the terminal material belt to form the welding part, so that the vertical rod part, the transition part and the welding part are of a Y-shaped structure.

8. The integrally formed inductor coil assembly of claim 5, wherein: and the welding terminal is provided with a through hole for fixing the terminal strip.

9. The integrally formed inductor coil assembly of claim 5, wherein: the connecting parts are provided with a plurality of pairs of welding terminals, and the connecting parts and the pairs of welding terminals are alternately distributed.

10. The integrally formed inductor coil assembly of claim 5, wherein: the connecting part is of a thin and narrow metal strip structure and is vertically fixed between the two terminal material strips.