Alpha-type coil, spot welding jig of alpha-type coil and flattening spot welding method of alpha-type coil

Abstract

The invention relates to the technical field of inductors, and particularly discloses an alpha-type coil which comprises a coil (11), a left lead sheet (12) and a right lead sheet (13), and the left lead sheet (12) and the right lead sheet (13) are arranged on the coil (11). The coil (11), the left lead sheet (12) and the right lead sheet (13) jointly form an alpha shape; the left lead sheet and the right lead sheet at the two ends of the coil are designed to be of a structure perpendicular to the opening of the coil. By means of the design, when the inductor is installed on a circuit board, the left lead piece and the right lead piece can make contact with the circuit board in a vertical mode and are welded. Compared with a traditional connection mode that the lead sheets are horizontally placed and contacted, the area of a bonding pad needed by the vertical contact mode is remarkably reduced, and therefore the occupied layout space of the inductor on a circuit board is effectively reduced. Based on the improvement, more electronic elements can be arranged on the circuit board with the same size, the high-density integration and miniaturization development of electronic products can be realized, and the market demand of modern electronic equipment on a compact structure can be better met.

Description

Technical Field

[0001] This invention relates to the field of inductor technology, and more particularly to an α-type coil. Background Technology

[0002] With the development of the semiconductor industry, the demand for circuit board components is increasing. Inductors, as an important semiconductor device, are developing towards integration and miniaturization.

[0003] Existing integrated molded traditional cold-pressed inductors occupy a large area of ​​the circuit board, which is gradually failing to meet the needs of miniaturized electronic products. To meet product requirements while minimizing the contact area between the inductor and the PCB, the design space needs to be optimized by increasing the contact space on the bottom surface of the product along the height direction to satisfy customer applications. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an α-type coil, which reduces the occupancy rate on the circuit board by keeping the left and right lead plates perpendicular to the coil opening, thereby meeting the needs of miniaturized electrical products.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An α-type coil includes: a coil, a left lead piece and a right lead piece disposed on the coil; the coil, the left lead piece and the right lead piece together form an α-shape; the left lead piece and the right lead piece are perpendicular to the opening of the coil.

[0006] The spot welding fixture for α-type coils includes: a main body, two iron plate slots formed on the main body, and a coil slot formed between the two iron plate slots.

[0007] Preferably, the coil groove includes a lead groove, a circular groove disposed on one side of the center of the lead groove, and a cylinder disposed at the center of the circular groove.

[0008] The flattening and spot welding method for α-type coils includes the following steps: Step S: Use a vibratory feeder to vibrate the α-type coil onto the vertical coil transfer sprocket; Step S: While transferring the α-type coil via the vertical coil transfer sprocket, the α-type coil is inverted using the weight of the coil until it is transferred into the flattening fixture. Step S: The two placement blocks in the flattening fixture move upward to lift the α-type coil. At this time, the left and right leads of the α-type coil are placed in the flattening grooves in the placement blocks respectively. Step S: During flattening, the two flattening blocks in the flattening fixture descend and flatten the left and right lead wires placed in the flattening groove through the flattening protrusions on the flattening blocks; Step S: After flattening, the placement block descends, and the flattened α-type coil is returned to the transfer sprocket and transferred to the side of the soldering fork. The robot arm then picks up the flattened α-type coil and places it into the soldering fork for soldering. Step S: Finally, place the tinned α-type coil into the coil slot in the spot welding fixture, then place the tinplate sheet into the iron plate slot, and weld the α-type coil onto the tinplate sheet by electric welding.

[0009] Compared with the prior art, this application has the following beneficial effects: This invention designs the left and right lead plates at both ends of the coil to be perpendicular to the coil opening. This design allows the left and right lead plates to contact and solder with the circuit board vertically when the inductor is mounted to the circuit board. Compared to the traditional method of flat lead plate contact, this vertical contact method requires a significantly smaller pad area, effectively reducing the space occupied by the inductor on the circuit board. Based on this improvement, more electronic components can be arranged on a circuit board of the same size, which is conducive to the high-density integration and miniaturization of electronic products, better meeting the market demand for compact structures in modern electronic devices. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0011] Figure 1 This is a schematic diagram of the structure of an α-type coil according to the present invention; Figure 2 For use Figure 1 A schematic diagram of the spot welding fixture structure; Figure 3 For use Figure 1 A schematic diagram of the flattening fixture structure; Figure 4 for Figure 3 A schematic diagram of the three-dimensional structure. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0013] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0014] Unless otherwise defined, the technical or scientific terms used in this patent document shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this patent specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or its equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. These terms are only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0015] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, features in the following embodiments can be combined with each other.

[0016] Example 1: like Figure 1 As shown, an α-type coil includes: an α-type coil comprising: a coil 11, a left lead piece 12 and a right lead piece 13 disposed on the coil 11; the coil 11, the left lead piece 12, and the right lead piece 13 together form an α-shape; the left lead piece 12 and the right lead piece 13 are perpendicular to the opening of the coil 11.

[0017] The left lead piece 12 and the right lead piece 13 are perpendicular to the coil 11. When the inductor is mounted on the circuit board, the left lead piece 12 and the right lead piece 13 are also perpendicular to the circuit board. Compared with the traditional lead piece being connected to the circuit board by being laid flat, the vertical contact connection requires less area on the circuit board. Under the same size, the circuit board can accommodate more electrical components, which can better meet the market demand for compact structures in modern electronic devices.

[0018] like Figure 2As shown, the spot welding fixture for the α-type coil includes: a main body 21, two iron plate grooves 22 formed on the main body 21, and a coil groove 23 formed between the two iron plate grooves 22; the coil groove 23 includes a lead wire groove 231, a circular groove 232 set on one side of the center of the lead wire groove 231, and a cylinder 233 set at the center of the circular groove 232.

[0019] During electric welding, the α-type coil 10 needs to be placed in the coil groove 23, and then tinplate sheets are placed in the two iron plate grooves 22 for welding. Specifically, the left lead plate 12, the right lead plate 13 and the coil 11 in the α-type coil 10 are respectively embedded in the lead groove 231 and the circular groove 232, and the coil 11 is exactly fitted inside the cylinder 233. Through the inlay connection of each part, the α-type coil 10 is stabilized in the spot welding fixture 20 to prevent shaking and welding deviation during electric welding.

[0020] Among them, the two tinplate pieces in the two iron plate slots 22 are spot welded to the left lead plate 12 and the right lead plate 13 respectively.

[0021] like Figure 3 and Figure 4 As shown, the flattening and spot welding method for α-type coils includes the following steps: Step S01: Use a vibratory feeder to vibrate the α-type coil 10 onto the vertical coil transfer sprocket; Step S02: While the α-type coil 10 is being transferred via the vertical coil transfer sprocket, the α-type coil 10 is inverted using the weight of the coil until it is transferred into the flattening fixture 30. Step S03: The two placement blocks 34 in the flattening fixture 30 move upward to lift the α-type coil 10. At this time, the left lead 12 and the right lead 13 in the α-type coil 10 are respectively placed in the flattening groove 33 in the placement block 34. Step S04: During flattening, the two flattening blocks 31 in the flattening fixture 30 descend and flatten the left lead wire 12 and the right lead wire 13 placed in the flattening groove 33 through the flattening protrusions 32 on the flattening blocks 31. Step S05: After flattening, the placement block 34 descends, and the flattened α-type coil 10 is returned to the transfer sprocket and transferred to the side of the soldering fork. The robot arm picks up the flattened α-type coil 10 and puts it into the soldering fork for soldering. Step S06: Finally, place the tinned α-type coil 10 into the coil slot 23 in the spot welding fixture 20, then put the tinplate sheet into the iron plate slot 22, and weld the α-type coil 10 onto the tinplate sheet by electric welding.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An α-type coil, characterized in that, include: A coil (11), with a left lead piece (12) and a right lead piece (13) disposed on the coil (11); the coil (11), the left lead piece (12), and the right lead piece (13) together form an α-shape; the left lead piece (12) and the right lead piece (13) are perpendicular to the opening of the coil (11).

2. The spot welding fixture for the α-type coil according to claim 1, characterized in that, include: The main body (21) has two iron plate slots (22) on the main body (21) and a coil slot (23) between the two iron plate slots (22).

3. The spot welding fixture for the α-type coil according to claim 2, characterized in that, The coil slot (23) includes a lead slot (231), a circular slot (232) located on one side of the center of the lead slot (231), and a cylinder (233) located at the center of the circular slot (232).

4. The method for flattening and spot welding an α-type coil according to claims 1-3, characterized in that, Includes the following steps: Step S01: Vibrate the α-type coil (10) onto the vertical coil transfer sprocket using a vibratory feeder; Step S02: While the α-type coil (10) is being transferred via the vertical coil transfer sprocket, the α-type coil (10) is inverted by utilizing the weight of the coil until it is transferred into the flattening fixture (30). Step S03: The two placement blocks (34) in the flattening fixture (30) are moved upward to lift the α-type coil (10). At this time, the left lead (12) and right lead (13) in the α-type coil (10) are placed in the flattening groove (33) in the placement block (34); Step S04: During flattening, the two flattening blocks (31) in the flattening fixture (30) descend and flatten the left lead wire (12) and right lead wire (13) placed in the flattening groove (33) through the flattening protrusion (32) on the flattening block (31); Step S05: After flattening, the placement block (34) descends and returns the flattened α-type coil (10) to the transfer sprocket, which then transfers it to the side of the soldering fork. The robot then grabs the flattened α-type coil (10) onto the soldering fork for soldering. Step S06: Finally, place the tinned α-type coil (10) into the coil slot (23) in the spot welding fixture (20), then put the tinplate sheet into the iron plate slot (22), and weld the α-type coil (10) onto the tinplate sheet by electric welding.

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