Base type pin structure

Abstract

The utility model discloses a base type pin structure, which comprises a flat plate type transformer main body, two sides of the flat plate type transformer main body are fixedly connected with pin positioning plates, each pin positioning plate is provided with a plurality of pin holes, a pin is inserted in each pin hole, the pins and the pin positioning plates are fixed in a soldering tin mode, and the pin positioning plates are fixedly connected with the flat plate type transformer main body. The flat plate type transformer comprises a flat plate type transformer body and a transformer base, the transformer base is arranged at the bottom of the flat plate type transformer body, and a transformer installation groove is formed in the top of the transformer base. The pin positioning plate is arranged on the PCB, the pin soldering tin position can be isolated, so that the stability of the pin is guaranteed, and the problem that when the pin is welded to the PCB, tin melting happens to soldering tin between the pin and the pin positioning plate, the pin inclines, and then welding is poor is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, and particularly relates to a base type pin structure. Background Art

[0002] A PCB transformer is a transformer specifically designed for printed circuit boards. It is usually a surface-mounted device located on the surface of the circuit board, providing any necessary voltage transformation or current conversion. These devices have various different performances and sizes, ensuring that their types can provide a choice for any imaginable product. The flat transformer uses small-sized E-type, RM-type or toroidal ferrite cores, which are usually made of high-frequency power ferrite materials and have low core losses at high frequencies. Its windings are formed by overlapping multiple layers of printed circuit boards. The windings or copper sheets are stacked on the planar high-frequency iron core to form the magnetic circuit of the transformer. It has advantages such as high current density, high efficiency, good heat conduction, and small volume, and is widely used in PCB transformers. However, the pins of the current flat transformers are fixed by soldering, but when it reaches the client, it will be soldered to the PCB using an infrared reflow oven process. However, during the infrared reflow oven soldering operation, the solder between the pins and the PCB may also melt, easily causing the pins to skew, and thus resulting in poor soldering problems. Therefore, it is extremely urgent to design a card-type pin structure to solve the above problems, which is particularly important. Summary of the Utility Model

[0003] 1. Technical Problems to be Solved by the Utility Model

[0004] Aiming at the deficiencies of the prior art, the purpose of the present utility model is to provide a base type pin structure, aiming to solve the problem that when the flat transformer in the prior art is soldered to the PCB, the solder between the pins and the PCB is prone to melting, resulting in pin skew and poor soldering.

[0005] 2. Technical Solutions

[0006] To achieve the above purpose, the present utility model provides the following technical solutions:

[0007] A base - type pin structure includes a flat - type transformer body. Both sides of the flat - type transformer body are fixedly connected with pin positioning plates. A plurality of pin holes are formed in the pin positioning plates. Each pin hole is inserted with a pin. The pin and the pin positioning plate are fixed by soldering. It further includes a transformer base. The transformer base is arranged at the bottom of the flat - type transformer body. A transformer installation groove is formed at the top of the transformer base. The bottom end of the flat - type transformer body can be snapped into the transformer installation groove. Pin through - holes corresponding to the pins are formed on both sides of the transformer base. The bottom end of the pin can pass through the pin through - holes for positioning the pin position. A limiting structure is arranged between the pin and the transformer base.

[0008] As a preferred solution of the present utility model, the length and width of the transformer base are both greater than the length and width of the flat - type transformer body.

[0009] As a preferred solution of the present utility model, the limiting structure includes a positioning strip arranged on the outer wall of the pin and a positioning groove formed in the pin through - hole. The positioning strip is arranged along the length direction of the pin. The top end of the positioning groove extends through the transformer base, and the bottom end of the positioning groove is located inside the transformer base. When the pin passes through the pin through - hole, it is limited by the positioning strip being inserted into the positioning groove in a position - aligned manner.

[0010] As a preferred solution of the present utility model, the height of the bottom end of the pin is not higher than the height of the bottom surface of the transformer base.

[0011] As a preferred solution of the present utility model, avoiding grooves are formed at both sides of the bottom of the transformer base at the positions of the pins. The depth of the avoiding groove is greater than half of the thickness of the transformer base.

[0012] As a preferred solution of the present utility model, a flared groove is arranged at the inlet of the transformer installation groove.

[0013] As a preferred solution of the present utility model, a liquid - containing groove is formed at the inner bottom end of the transformer installation groove. The liquid - containing groove is arranged in a circle.

[0014] 3. Beneficial effects

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] (1) By adding a transformer base at the bottom of the traditional flat transformer, the present utility model enables the pin part to pass through the pin through-hole for auxiliary positioning of the pins and can isolate the soldering part of the pins to ensure the stability of the pins. When soldering to the PCB board, it can avoid the situation of solder melting between the pins and the pin positioning plate, which may cause the pins to skew and further lead to poor soldering. Moreover, by installing the flat transformer body into the transformer installation groove, the transformer assembly process can be standardized, and then automated production can be achieved. The assembly process becomes simpler, reducing man-hours and improving production efficiency.

[0017] (2) Through the provided limiting structure, when installing the pins onto the transformer base, the pins are longitudinally inserted downward into the pin through-holes, and then the positioning strips are inserted into the positioning grooves in alignment. On the one hand, it is used to limit the installation position of the pins, and on the other hand, it can prevent the pins from deflecting and affecting the stability of the pin soldering fixation. Brief Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of the base-type pin structure;

[0019] Figure 2 It is a front view schematic diagram of the base-type pin structure;

[0020] Figure 3 It is a three-dimensional structure schematic diagram of the transformer base;

[0021] Figure 4 It is a sectional structure schematic diagram of the transformer base and the pins.

[0022] In the figure: 1. Flat transformer body; 2. Pin positioning plate; 3. Pins; 31. Positioning strip; 4. Transformer base; 41. Transformer installation groove; 411. Liquid-containing groove; 42. Pin through-hole; 421. Positioning groove; 43. Avoidance groove. Detailed Embodiment

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Embodiment

[0024] Please refer to Figures 1-4, this embodiment provides a base - type pin structure, which includes a flat - type transformer body 1. Pin positioning plates 2 are fixedly connected to both sides of the flat - type transformer body 1. A plurality of pin holes are formed in the pin positioning plates 2, and a pin 3 is inserted into each pin hole. The pin 3 is fixed to the pin positioning plate 2 by soldering. This is the prior art of the flat - type transformer and will not be elaborated here. This embodiment further includes a transformer base 4. The transformer base 4 is arranged at the bottom of the flat - type transformer body 1. A transformer installation groove 41 is formed at the top of the transformer base 4. The bottom end of the flat - type transformer body 1 can be snapped into the transformer installation groove 41. Pin through - holes 42 corresponding to the pins 3 are formed on both sides of the transformer base 4. The bottom end of the pin 3 can pass through the pin through - holes 42 to position the pins 3. A limiting structure is arranged between the pins 3 and the transformer base 4. By adding the transformer base 4 at the bottom of the traditional flat - type transformer, part of the pins 3 pass through the pin through - holes 42, which is used for auxiliary positioning of the pins 3 and can isolate the soldering part of the pins 3 to ensure the stability of the pins 3. When soldering to the PCB board, it can avoid the situation of molten solder between the pins 3 and the pin positioning plates 2, resulting in the skew of the pins 3 and further causing poor soldering problems. And by installing the flat - type transformer body 1 into the transformer installation groove 41, the transformer assembly process can be standardized, and then automated production can be achieved. The assembly process becomes simpler, reducing man - hours and improving production efficiency.

[0025] In this embodiment, as Figure 1 shown, the length and width of the transformer base 4 are both greater than those of the flat - type transformer body 1, making the transformer base 4 have higher load - bearing stability and improving the load - bearing stability effect on the flat - type transformer body 1.

[0026] In this embodiment, as Figure 4 shown, the limiting structure includes a positioning strip 31 arranged on the outer wall of the pin 3 and a positioning groove 421 formed in the pin through - hole 42. The positioning strip 31 is arranged along the length direction of the pin 3. The top end of the positioning groove 421 extends through the transformer base 4, and the bottom end of the positioning groove 421 is located inside the transformer base 4. When the pin 3 passes through the pin through - hole 42, it is limited by the positioning strip 31 being inserted into the positioning groove 421 in alignment. When installing the pin 3 onto the transformer base 4, the pin 3 is longitudinally inserted downward into the pin through - hole 42, and then the positioning strip 31 is inserted into the positioning groove 421 in alignment. On the one hand, it is used to limit the installation position of the pin 3, and on the other hand, it avoids the deflection of the pin 3, affecting the stability of the soldering fixation of the pin 3.

[0027] In this embodiment, as Figure 2As shown, the height of the bottom end of the pin 3 is not higher than the height of the bottom surface of the transformer base 4. The height of the bottom end of the pin 3 can be flush with the height of the bottom surface of the transformer base 4, or the height of the bottom end of the pin 3 can also be lower than the height of the bottom surface of the transformer base 4, which can be flexibly designed according to the actual use scenario so that the pins can be soldered and fixed on the PCB board.

[0028] In this embodiment, as Figure 3 shown, relief grooves 43 are provided at both sides of the bottom of the transformer base 4 at the positions of the pins 3. The depth of the relief grooves 43 is greater than half of the thickness of the transformer base 4. By providing the relief grooves 43, the bottom of the transformer base 4 at the positions of the pins 3 is a hollow structure, which is convenient for soldering operations at the connection between the pins 3 and the PCB board.

[0029] In this embodiment, as Figure 3 shown, a flared groove is provided at the inlet of the transformer installation groove 41. By providing the flared groove, the width of the inlet of the transformer installation groove 41 is enlarged, providing a certain misalignment space for installing the flat transformer body 1 into the transformer installation groove 41, and improving the convenience of assembling the flat transformer body 1 and the transformer base 4.

[0030] In this embodiment, as Figure 3 shown, a liquid storage groove 411 is provided at the inner bottom end of the transformer installation groove 41. The liquid storage groove 411 is arranged in a circle. By coating a layer of adhesive glue in the liquid storage groove 411, the connection stability between the flat transformer body 1 and the transformer base 4 is improved.

[0031] Working principle: During assembly, first insert the pins 3 into the pin through-holes 42 of the transformer base 4 in sequence, and insert them into the positioning grooves 421 through the positioning bars 31 to limit the installation position of the pins 3. Then, coat a layer of adhesive glue in the liquid storage groove 411, and then install the flat transformer body 1 into the transformer installation groove 41 of the transformer base 4, assemble and fix the flat transformer body 1 and the transformer base 4, so that the pins 3 pass through the pin holes on the pin positioning plate 2, and solder and fix the pins 3 at the positions of the pin holes to complete the assembly. By adding the transformer base 4 at the bottom of the traditional flat transformer, part of the pins 3 pass through the pin through-holes 42, which is used for auxiliary positioning of the pins 3 and can isolate the soldering parts of the pins 3 to ensure the stability of the pins 3 and avoid the situation of molten solder between the pins 3 and the pin positioning plate 2 when soldering to the PCB board, resulting in the skew of the pins 3 and further causing the problem of poor soldering. And by installing the flat transformer body 1 into the transformer installation groove 41, the transformer assembly process can be standardized, and then automated production can be carried out, making the assembly process simpler, reducing the working hours and improving the production efficiency.

[0032] All technical features in this embodiment can be freely combined according to actual needs.

[0033] The above embodiments are preferred implementation schemes of the present utility model. In addition, the present utility model can also be implemented in other ways. Any obvious substitution without departing from the concept of the technical solution is within the protection scope of the present utility model.

Claims

1. A base-type pin structure, comprising a flat-type transformer body (1), wherein both sides of the flat-type transformer body (1) are fixedly connected to a pin positioning plate (2), wherein the pin positioning plate (2) is provided with a plurality of pin holes, wherein each of the pin holes is plugged with a pin (3), wherein the pin (3) is fixed to the pin positioning plate (2) by soldering, and wherein: The transformer base (4) is also included. The transformer base (4) is arranged at the bottom of the flat transformer body (1). A transformer mounting groove (41) is provided at the top of the transformer base (4). The bottom end of the flat transformer body (1) can be inserted into the transformer mounting groove (41). Pin holes (42) are provided at the positions corresponding to the pins (3) on both sides of the transformer base (4). The bottom end of the pin (3) can pass through the pin hole (42) to locate the position of the pin (3). A limiting structure is provided between the pin (3) and the transformer base (4).

2. A base type pin structure according to claim 1, characterized in that: The length and width of the transformer base (4) are both greater than the length and width of the flat-plate transformer body (1).

3. The base type pin structure according to claim 1, characterized in that: The limiting structure comprises a positioning strip (31) arranged on the outer wall of the pin (3) and a positioning groove (421) provided in the pin through hole (42); the positioning strip (31) is arranged along the length direction of the pin (3); the top end of the positioning groove (421) extends through the transformer base (4); the bottom end of the positioning groove (421) is placed inside the transformer base (4); when the pin (3) passes through the pin through hole (42), the positioning strip (31) is inserted into the positioning groove (421) for limiting.

4. A base type pin structure according to claim 3, characterized in that: The height of the bottom end of the pin (3) is no higher than the height of the bottom surface of the transformer base (4).

5. A base type pin structure according to claim 4, characterized in that: Avoidance grooves (43) are provided on both sides of the bottom of the transformer base (4) at the pins (3), and the depth of the avoidance grooves (43) is greater than half the thickness of the transformer base (4).

6. The base type pin structure according to claim 1, characterized in that: A flaring groove is provided at the entrance of the transformer installation groove (41).

7. The base type pin structure according to claim 1, characterized in that: A liquid containing groove (411) is provided at the inner bottom end of the transformer installation groove (41), and the liquid containing grooves (411) are arranged in a circle.

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