Filter and its circuit board, connector

Abstract

This utility model discloses a filter, including a metal shell, a circuit board disposed therein, and metal terminals electrically connected to the circuit board and extending out of the metal shell. It also includes a connector, which is U-shaped and made of a thin metal sheet, inserted and mounted on the circuit board to form a connecting support between the circuit board and the metal terminals, used to support the circuit board's output lines. The connector has pins on both sides and a connecting section between the two sides, with holes formed in the connecting section. The metal terminals extend inward and have hooks that engage with the holes in the connector's connecting section for soldering. The circuit board has pin slots, and the connector pins are inserted into these slots for soldering. Compared to existing technologies, this utility model filter, by using studs and connectors, makes the connection more reliable, and the product's process and structure are simple and aesthetically pleasing, with a high degree of automation, facilitating production.

Description

Technical Field

[0001] This utility model belongs to the field of filters, specifically relating to a metal-cased electromagnetic compatibility filter and its circuit board and connector. Background Technology

[0002] With the continuous advancement of electronic circuit technology, switching power supplies are developing towards higher power density, higher efficiency, higher reliability, higher frequency, and lower cost. This trend has led to more constraints on the filtering circuits of switching power supplies themselves, and correspondingly, higher requirements have been placed on the electromagnetic compatibility (EMC) filters used with them to ensure that the entire unit meets more stringent EMC performance standards. As a result, the demand for such filters is growing. At the same time, switching power supplies are used in a wide range of industries and operate in complex and diverse environments, resulting in diverse performance requirements for EMC filters. Among these, the demand for metal-cased EMC filters with higher reliability and the ability to withstand harsher environments is particularly prominent. To meet the requirements of low cost and high density for metal-cased EMC filters, their structural design often relies on manual soldering and assembly. However, this manufacturing method inevitably leads to problems such as poor production consistency, low automation, and low reliability of the final product. Utility Model Content

[0003] To address the aforementioned issues, this invention provides a metal-cased filter to improve the uniformity and automation of filter production, and enhance the reliability of the output products.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solution: A filter includes a metal housing, a circuit board disposed therein, and metal terminals electrically connected to the circuit board and extending out of the metal housing. It also includes a connector, which is U-shaped and made of a thin metal sheet, inserted and mounted on the circuit board to form a connecting support between the circuit board and the metal terminals, used to support the circuit board's output lines. The connector has pins on both sides and a connecting section between the two sides, with holes formed in the connecting section. The metal terminals extend inward and have hooks that engage with the holes in the connector's connecting section for soldering. The circuit board has pin slots, and the connector's pins are inserted into these pin slots for soldering.

[0005] Preferably, four connectors are mounted on the circuit board, and four metal terminals are provided on the metal shell. The hooks of the four metal terminals are respectively inserted into the holes of the four connector connecting sections for welding.

[0006] Preferably, the connector pins are narrowed to have an insertion end, and the end face of the wider portion that connects with the insertion end forms the connector's limiting support surface.

[0007] Preferably, the connector pins are provided with solder grooves; the connector pins are narrowed to have insertion ends, and the solder grooves are distributed along the upper boundary line of the insertion ends.

[0008] Preferably, the circuit board has a mounting groove to provide space for assembling the metal terminal hooks.

[0009] Preferably, four connectors are mounted on the circuit board, the circuit board has four mounting slots, the metal shell has four metal terminals, and the hooks of the four metal terminals pass through the mounting slots of the circuit board and are respectively inserted into the holes of the four connector connection sections for welding.

[0010] Preferably, the pin slots of the circuit board are designed with flower pads; and / or the circuit board is provided with flower pads.

[0011] Preferably, an insulating element is provided between the metal casing and the metal terminals; studs are provided inside the metal casing for bolt fixing between the circuit board and the metal casing, and copper foil is provided on the circuit board at the position corresponding to the studs. When the circuit board is fixed to the metal casing by bolts, the grounding function between the circuit board and the metal casing is realized; and / or the metal casing of the filter is encapsulated with potting compound.

[0012] This utility model also provides a filter circuit board, which is a single-layer board with a square structure. The circuit board has four pairs of pin slots, which are respectively set at the four corners of the circuit board for the insertion and soldering of connector pins. The circuit board also has four mounting slots, which are used for the hooks of metal terminals to pass through the mounting slots of the circuit board and be inserted into the holes of the four connector connection sections for soldering.

[0013] Preferably, the pin slots of the circuit board are designed with flower pads; and / or the circuit board is provided with flower pads.

[0014] This utility model provides a filter connector made of a thin metal sheet, which is U-shaped with pins on both sides and a connecting section between the two sides. The connecting section has holes. The pins are narrowed to have insertion ends, and the pins also have solder grooves distributed along the upper boundary line of the insertion end.

[0015] Preferably, the hole on the connecting section is a square or round through hole; the solder groove on the pin is an oblong through groove.

[0016] Compared with existing technologies, the beneficial effects of this utility model filter are as follows: 1. By using studs and connectors, the product connection is more reliable, the product process and structure are simple and beautiful, the degree of automation is high, and it is easy to produce. Attached Figure Description

[0017] Figure 1 This is a perspective view of the filter of this utility model, showing its unencapsulated state; Figure 2 This is a three-dimensional exploded view of the filter of this utility model; Figure 3 This is a perspective view of the metal casing of the filter of this utility model; Figure 4 This is a perspective view of the circuit board of the filter of this utility model; Figure 5 This is a perspective view of the connector of the filter of this utility model.

[0018] The reference numerals in the above figures are explained as follows: 10. Housing, 11. Metal terminals, 12. Hooks, 14. Insulators, 16. Studs; 20 Circuit board, 21 Pin slot, 22 Mounting slot, 25 Component pads; 30 Connector, 31 Connecting section, 32 Pin, 34 Hole, 36 Insertion end, 37 End face, 39 Solder groove; 40 screws. Detailed Implementation

[0019] The present invention and its beneficial effects will be further described in detail below with reference to specific embodiments and accompanying drawings. However, the specific embodiments of the present invention are not limited thereto.

[0020] Please see Figures 1 to 5 A filter includes a metal housing 10, a circuit board 20 disposed therein, and metal terminals 11 electrically connected to the circuit board and extending out of the metal housing. It also includes a connector 30, which is U-shaped and made of a thin metal sheet. The connector is inserted and mounted on the circuit board 20, forming a connecting support between the circuit board 20 and the metal terminals 11, used to support the circuit board's output lines, simplifying the circuit board's input / output structure and facilitating production automation. The connector has pins 32 on both sides and a connecting section 31 between them, with holes 34 on the connecting section. The metal terminals 11 have hooks 12 extending inwards, which are then soldered into the holes 34 of the connector's connecting section to achieve electrical connection between the connector 30 and the metal terminals 11. The circuit board has pin slots 21, and the connector's pins 32 are inserted into the pin slots 21 of the circuit board for soldering, thus enabling the circuit board's output lines and electrical connection between the circuit board and the connector.

[0021] The number of connectors 30 mounted on the circuit board is four, the number of metal terminals 11 of the metal shell is four, and the hooks 12 of the four metal terminals are respectively inserted into the holes 34 of the four connector connecting sections for soldering.

[0022] The connector's pins 32 are narrowed to form an insertion end 36, which is used to insert into the pin slots 21 of the circuit board for soldering. The wider end face 37, which connects with the insertion end, forms a limiting support surface for the connector, supporting the connector on the circuit board. The connector's pins 32 have solder grooves 39, which are distributed along the upper boundary line of the insertion end.

[0023] The circuit board has mounting slots 22 to provide space for the assembly of metal terminal hooks. There are four connectors 30 mounted on the circuit board, four mounting slots 22, and four metal terminals 11 on the metal housing. The hooks 12 of the four metal terminals pass through the mounting slots 22 on the circuit board and are respectively assembled into the holes 34 of the four connector connecting sections for soldering.

[0024] The lead slot 21 on the circuit board uses a floral pad design. Other floral pads, such as component pads 25, can also be provided on the circuit board.

[0025] An insulating component 14 is provided between the metal casing and the metal terminals. Inside the metal casing, studs 16 are provided for bolting the circuit board 20 to the metal casing 10. Copper foil is also provided on the circuit board 20 at the positions corresponding to the studs. When the circuit board 20 is bolted to the metal casing 10, grounding is achieved between the circuit board 20 and the metal casing 10. The metal casing 10 of the filter can be encapsulated with potting compound. The metal terminals 11 are the L and N lines for input and output. Of the four metal terminals on the metal casing, the left side has the input L and input N lines, and the right side has the filter's output L and output N lines.

[0026] like Figure 3 As shown, a filter circuit board 20 is a single-layer board with a square structure. The circuit board has four pairs of pin slots 21, located at the four corners, for inserting and soldering connector pins 32. It also has four mounting slots 22 for metal terminal hooks 12 to pass through and be inserted into the holes 34 of the four connector connection sections for soldering. The pin slots 21 of the circuit board use a patterned pad design. Other patterned pads, such as component pads 25, may also be provided on the circuit board.

[0027] like Figure 4 As shown, a filter connector 30 is made of a thin metal sheet and is U-shaped overall. It has pins 32 on both sides and a connecting section 31 between the two sides. Holes 34 are provided on the connecting section. The pins narrow to form insertion ends 36, and solder grooves 39 are also provided on the pins, distributed along the upper boundary line of the insertion ends. The holes 34 on the connecting section are square or round through-holes, and the solder grooves 39 on the pins are oblong through-slots.

[0028] The filter of this utility model includes a metal housing 10, a connector 30, and a circuit board 20. The connector 30 is used to connect the output lines of the circuit board 20 and the metal terminals 11 of the metal housing. After the connector 30 is soldered to the circuit board 20, the circuit board 20 is fixed to the metal housing 10 with screws. The input and output metal terminals 11 are soldered to the metal housing 10 through automated operations such as laser welding or robotic welding. The grounding effect is achieved simultaneously when the circuit board 20 and the metal housing 10 are screwed together. The circuit board 20 and the metal housing 10 are then connected through the metal terminals 11, which simplifies the input and output structure of the filter product, makes it possible for automated mechanical production, and improves the automation level of product manufacturing.

[0029] The above embodiments are only used to help understand the inventive concept and technical solution of this utility model. For those skilled in the art, other equivalent application schemes that can be naturally associated with the above description and examples without departing from the inventive concept, as well as some simple substitutions, improvements and modifications to this utility model, all fall within the protection scope of the claims of this utility model.

Claims

1. A filter comprising a metal housing, a circuit board disposed therein, and metal terminals electrically connected to the circuit board and extending out of the metal housing, characterized in that: It also includes connectors, which are U-shaped and made of thin metal sheets. These connectors are inserted and mounted on the circuit board, forming a connection between the circuit board and the metal terminals, and are used to support the circuit board's output lines. The connector has pins on both sides and a connecting section between the two sides, with holes provided on the connecting section; The metal terminal extends inward and is provided with a hook, which is then inserted into the hole of the connector connection section for welding. The circuit board has pin slots, and the connector pins are inserted into the pin slots of the circuit board for soldering.

2. The filter according to claim 1, characterized in that: The number of connectors mounted on the circuit board is four, and the number of metal terminals on the metal shell is four. The hooks of the four metal terminals are respectively inserted into the holes of the four connector connecting sections for welding.

3. The filter according to claim 1, characterized in that: The connector pins are narrowed and have an insertion end. The end face of the wider portion that connects with the insertion end forms the limiting support surface of the connector.

4. The filter according to claim 1, characterized in that: The connector pins are provided with solder grooves; the connector pins are narrowed to have insertion ends, and the solder grooves are distributed along the upper boundary line of the insertion ends.

5. The filter according to claim 1, characterized in that: The circuit board has a mounting slot to provide space for the assembly of metal terminal hooks.

6. The filter according to claim 1, characterized in that: The number of connectors mounted on the circuit board is four, the circuit board has four mounting slots, the number of metal terminals on the metal shell is four, and the hooks of the four metal terminals pass through the mounting slots on the circuit board and are respectively inserted into the holes of the four connector connection sections for welding.

7. The filter according to claim 1, characterized in that: The pin slots of the circuit board are designed with flower pads; and / or the circuit board is provided with flower pads.

8. The filter according to claim 1, characterized in that: An insulating component is provided between the metal casing and the metal terminals; studs are provided inside the metal casing for bolting the circuit board to the metal casing, and copper foil is provided on the circuit board at the position corresponding to the studs. When the circuit board is bolted to the metal casing, the grounding function between the circuit board and the metal casing is realized; and / or the metal casing of the filter is encapsulated with potting compound.

9. A circuit board for a filter, characterized in that: The board is a single-layer board with a square structure. It has four pairs of pin slots located at the four corners of the board for connector pin insertion and soldering. The board also has four mounting slots for metal terminal hooks to pass through the mounting slots and be inserted into the holes of the four connector connection sections for soldering.

10. The circuit board of the filter according to claim 9, characterized in that: The pin slots of the circuit board are designed with flower pads; and / or the circuit board is provided with flower pads.

11. A connector for a filter, characterized in that: Made of thin metal sheet, it is U-shaped with pins on both sides and a connecting section between the two sides. The connecting section has holes. The pins are narrowed to have insertion ends, and the pins also have solder grooves. The solder grooves are distributed along the upper boundary line of the insertion end.

12. The connector for the filter according to claim 11, characterized in that: The holes on the connecting section are square or round through holes; the solder grooves on the pins are waist-shaped through grooves.

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