Folding type welding piece material belt

Abstract

The utility model relates to the field of welding piece material belts, in particular to a folding type welding piece material belt which comprises welding frames, a connecting rod and welding pieces, the number of the welding frames is two, the two welding frames are distributed in the width direction of the folding type welding piece material belt, and the two ends of the connecting rod are connected to the welding frames correspondingly; the number of the welding pieces is multiple, the multiple welding pieces are divided into two groups, the two groups of welding pieces are distributed in the width direction of the folding type welding piece material belt, one group of welding pieces and the other group of welding pieces are arranged in a pairwise pairing mode, and the two groups of welding pieces are connected to the welding frames correspondingly. The welding piece is provided with two wrapping protrusions, the two wrapping protrusions are distributed in the width direction of the folding type welding piece material belt, the two wrapping protrusions are used for wrapping the two sides of the connecting part of the coil respectively, and a coil containing area is arranged between the two wrapping protrusions and used for containing the connecting part of the coil. The method has the effect of reducing the condition of coil pseudo soldering of the integrally-formed inductor.

Description

Technical Field

[0001] This application relates to the field of welding strip, and in particular to a folded welding strip. Background Technology

[0002] Molded inductors are commonly used in smart devices due to their small size. A molded inductor consists of a magnetic core, a coil, and solder tabs. The magnetic core is formed by hot pressing magnetic metal powder. The coil body is located inside the magnetic core and is arranged in a spiral shape. The coil has two connection points, both located outside the magnetic core. Two solder tabs are attached to the two connection points of the coil, increasing the contact area between the coil and the circuit board, thus ensuring a stable connection between the inductor and the circuit board.

[0003] In existing related technologies, the welding tabs are disposed within the strip. The strip includes a welding frame and welding tabs, with the welding tabs paired in pairs, and each pair of welding tabs integrally connected to both sides of the folded welding tab strip. For details, please refer to the appendix to the specification of the invention patent with publication number CN 111210986 A, entitled "A Method for Manufacturing an Integrated Molded Inductor and an Invention Patent for an Integrated Molded Inductor". Figure 1 When it is necessary to solder the two connecting parts of the coil to the solder pads, the coil should be placed between the two paired solder pads, and then the two connecting parts should be soldered to the two solder pads respectively.

[0004] Regarding the aforementioned technologies, during actual use, the applicant discovered that the solder pads at the coil connection points are prone to detachment, resulting in poor soldering of the coil. Summary of the Invention

[0005] To reduce the occurrence of poor soldering of coils in integrally molded inductors, this application provides a folded solder strip.

[0006] The folded weldable strip provided in this application adopts the following technical solution:

[0007] A folded welding strip includes a welding frame, a connecting rod, and a welding strip. Two welding frames are provided, which are distributed along the width direction of the folded welding strip. The two ends of the connecting rod are respectively connected to each welding frame.

[0008] The welding sheet is provided in several groups, and the welding sheet is divided into two groups. The two groups of welding sheets are distributed along the width direction of the folded welding sheet strip, and one group of welding sheets is paired with the other group of welding sheets. The two groups of welding sheets are respectively connected to each welding frame.

[0009] The welding sheet has two covering protrusions, which are distributed along the width of the folded welding sheet strip. The two covering protrusions are used to cover both sides of the coil connection portion. A coil placement area is provided between the two covering protrusions, which is used to place the coil connection portion.

[0010] Optionally, the covering protrusion is integrally connected to the welding sheet.

[0011] Optionally, the welding sheet is provided with a support protrusion, which is located between two covering protrusions and extends along the length direction of the folded welding sheet strip.

[0012] Optionally, the support protrusion is integrally connected to the welding piece.

[0013] Optionally, the welding piece has a coil positioning groove located within the coil placement area, and the width of the coil positioning groove is adapted to the width of the coil connection portion.

[0014] Optionally, the covering protrusion has a narrowed end and an enlarged end, the width of the narrowed end is smaller than the width of the enlarged end, and the narrowed end is connected to the welding piece.

[0015] Optionally, the covering protrusion is trapezoidal in shape.

[0016] Optionally, the two covering protrusions on the welding sheet are staggered along the length direction of the folded welding sheet strip.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. When the coil connection needs to be soldered to the solder pad, place the connection in the coil placement area, and then spot weld on both sides of the connection. During spot welding, the covering protrusion close to the connection melts. After spot welding, the molten covering protrusion cools, solidifies, and shrinks, causing it to bend towards the connection. This ensures the covering protrusion covers the connection, making the coil less likely to detach from the solder pad and reducing the occurrence of poor solder joints in integrally molded inductors.

[0019] In addition, during and / or after soldering, the covering protrusion can be bent under force to make the connection part firmly cover the connection part of the coil, thereby making the coil less likely to fall off the solder piece and further reducing the occurrence of poor soldering of the coil of the integral molded inductor.

[0020] 2. It reduces the difficulty of bending the covering protrusion, making it easier to bend the covering protrusion and cover the connection part of the coil, which helps to further reduce the occurrence of poor soldering of the coil of the integral molded inductor.

[0021] 3. It helps reduce the occurrence of the coil connection deviating from the coil placement area. Attached Figure Description

[0022] Figure 1 This is an overall schematic diagram of the folded welding strip of Embodiment 1 of this application.

[0023] Figure 2 yes Figure 1 Enlarged schematic diagram of part A.

[0024] Figure 3 This is a schematic diagram of the implementation of the folded welding strip in Embodiment 1 of this application.

[0025] Figure 4 This is an overall schematic diagram of the folded welding strip of Embodiment 2 of this application.

[0026] Figure 5 yes Figure 4 Enlarged diagram of part B.

[0027] Figure 6 This is an overall schematic diagram of the folded welding strip of Embodiment 3 of this application.

[0028] Figure 7 This is a planar schematic diagram of the protrusion covered by Embodiment 3 of this application.

[0029] Figure 8 This is an overall schematic diagram of the folded welding strip of Embodiment 4 of this application.

[0030] Figure 9 This is a planar schematic diagram of the protrusion covered in Embodiment 4 of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Welding frame; 2. Connecting rod; 3. Welding piece; 301. Coil positioning groove; 31. Covering protrusion; 311. Reducing end; 312. Enlarging end; 32. Supporting protrusion. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0033] Example 1:

[0034] Embodiment 1 of this application discloses a folded welding sheet / strip. (Refer to...) Figure 1 The folded welding strip 3 includes a welding frame 1, connecting rods 2, and welding strip 3. There are two welding frames 1, distributed along the width direction of the folded welding strip 3. Several connecting rods 2 are distributed along the length direction of the folded welding strip 3, and both ends of each connecting rod 2 are integrally connected to one of the welding frames 1.

[0035] Reference Figure 1 and Figure 2 There are several welding sheets 3, which are divided into two groups. The two groups of welding sheets 3 are distributed along the width direction of the folded welding sheet 3 strip, and one group of welding sheets 3 is paired with the other group of welding sheets 3. The two groups of welding sheets 3 are integrally connected to each welding frame 1, and the two groups of welding sheets 3 are symmetrically arranged along the axis of the folded welding sheet 3 strip.

[0036] Reference Figure 2 The welding sheet 3 has two covering protrusions 31, both of which are rectangular. The two covering protrusions 31 are distributed along the width of the folded welding sheet 3 strip and are arranged in a straight line. Each of the two covering protrusions 31 is integrally connected to both sides of the welding sheet 3. A coil placement area is provided between the two covering protrusions 31. This coil placement area is used to place the connecting part of the coil, so that the two covering protrusions 31 can cover and fix the connecting part placed in the coil placement area.

[0037] Reference Figure 2 The welding sheet 3 also has a support protrusion 32, which is arranged in a fan shape. The support protrusion 32 is located between two covering protrusions 31, and the support protrusion 32 and the two covering protrusions 31 are distributed in a "T" shape. The support protrusion 32 extends along the length direction of the folded welding sheet 3 strip, and the support protrusion 32 is integrally connected to the welding sheet 3 to facilitate support of the coil connection during the welding process.

[0038] The implementation principle of the folded welding sheet 3 strip in Embodiment 1 of this application is as follows: (Refer to...) Figure 3 By spot welding or mechanical bending, the two covering protrusions 31 cover both sides of the connection part, making it less likely for the coil to fall off the solder piece 3, thus reducing the occurrence of poor soldering of the coil in the integrally molded inductor.

[0039] Example 2:

[0040] Embodiment 2 of this application discloses a folded welding sheet 3 strip, which, in addition to all the technical features of Embodiment 1, also includes the following technical features:

[0041] Reference Figure 4 and Figure 5 The welding piece 3 has a coil positioning groove 301. The coil positioning groove 301 is located in the coil placement area. The width of the coil positioning groove 301 is adapted to the width of the coil connection part. After the connection part is placed in the coil positioning groove 301, the connection part is attached to the inner wall of the coil positioning groove 301.

[0042] The implementation principle of the folded welding sheet 3 strip in Embodiment 2 of this application is as follows: the connecting part is limited by the coil positioning groove 301, reducing the occurrence of connecting part displacement. Furthermore, the thinner coil positioning groove 301 is more conducive to covering the bending of the protrusion 31.

[0043] Example 3:

[0044] Embodiment 3 of this application discloses a folded welding strip 3, which, in addition to all the technical features of Embodiment 1, also includes the following technical features:

[0045] Reference Figure 6 and Figure 7 The covering protrusion 31 is trapezoidal in shape and has a narrowed end 311 and an enlarged end 312. The width of the narrowed end 311 is smaller than the width of the enlarged end 312, and the narrowed end 311 of the covering protrusion 31 is integrally connected to the welding piece 3.

[0046] The implementation principle of the folded welding strip 3 in Embodiment 3 of this application is as follows: the width of the narrow end 311 is small, which makes it easy to bend and cover the protrusion 31.

[0047] Example 4:

[0048] Embodiment 4 of this application discloses a folded welding strip 3, which, in addition to all the technical features of Embodiment 1, also includes the following technical features:

[0049] Reference Figure 8 and Figure 9 The two covering protrusions 31 on the welding sheet 3 are staggered along the length of the folded welding sheet 3 strip.

[0050] The implementation principle of the folded welding sheet 3 strip in Embodiment 4 of this application is as follows: by using two staggered covering protrusions 31, the covering protrusions 31 on both sides of the coil connection part are less likely to collide with each other after bending, reducing the occurrence of gaps between the covering protrusions 31 and the connection part, thereby reducing the occurrence of poor soldering of the coil of the integrally formed inductor.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A folded welding strip, comprising a welding frame (1), a connecting rod (2) and a welding strip (3), wherein there are two welding frames (1), which are distributed along the width direction of the folded welding strip (3), and the two ends of the connecting rod (2) are respectively connected to each welding frame (1); The welding sheet (3) is provided in several groups, and the welding sheet (3) is divided into two groups. The two groups of welding sheets (3) are distributed along the width direction of the folded welding sheet (3) strip. One group of welding sheets (3) is paired with the other group of welding sheets (3) and the two groups of welding sheets (3) are respectively connected to each welding frame (1). Its features are: The welding sheet (3) is provided with two covering protrusions (31). The two covering protrusions (31) are distributed along the width direction of the folded welding sheet (3) strip. The two covering protrusions (31) are respectively used to cover both sides of the coil connection part. A coil placement area is provided between the two covering protrusions (31). The coil placement area is used to place the coil connection part.

2. The folded welded strip material according to claim 1, characterized in that: The covering protrusion (31) is integrally connected to the welding piece (3).

3. The folded welded strip material according to claim 1, characterized in that: The welding sheet (3) is provided with a support protrusion (32), which is located between two covering protrusions (31) and extends along the length direction of the folded welding sheet (3) strip.

4. The folded welded strip material according to claim 3, characterized in that: The support protrusion (32) is integrally connected to the welding piece (3).

5. The folded welded strip material according to claim 1, characterized in that: The welding piece (3) has a coil positioning groove (301) located in the coil placement area, and the width of the coil positioning groove (301) is adapted to the width of the coil connection part.

6. The folded welded strip material according to claim 1, characterized in that: The covering protrusion (31) has a narrow end (311) and an enlarged end (312). The width of the narrow end (311) is smaller than the width of the enlarged end (312), and the narrow end (311) is connected to the welding piece (3).

7. A folded welded strip material according to claim 6, characterized in that: The covering protrusion (31) is arranged in a trapezoidal shape.

8. The folded welded strip material according to claim 1, characterized in that: The two covering protrusions (31) on the welding sheet (3) are staggered along the length of the folded welding sheet (3) strip.

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