Corrosion-resistant control module

Abstract

The utility model discloses a corrosion-resistant control module which comprises a circuit board and a control chip installed on the upper surface of the circuit board, the circuit board is provided with a first through hole and a second through hole, a first connector is fixed in the first through hole, a second connector is fixed in the second through hole, and the first through hole and the second through hole are communicated. The connection interfaces of the first connector and the second connector pass through the first through hole and the second through hole and are arranged downwards on the lower surface of the circuit board; the output end of the control chip is electrically connected with the second connector through a driving circuit, and the first connector is electrically connected with the power supply end of the control chip; the driving circuit is in tin connection with the circuit board, and an insulating resin layer is packaged on the upper surface of the circuit board. According to the utility model, the insulating resin layer is packaged on the surface of the circuit board, so that corrosive substances such as moisture, salt and the like can be blocked, a plurality of groove strips can be arranged on the insulating resin layer, internal devices and the outside are not communicated by the groove strips, and the groove strips have a heat dissipation effect.

Description

Technical Field

[0001] This utility model belongs to the field of circuit board structure technology, specifically relating to a corrosion-resistant control module. Background Technology

[0002] Existing electronic devices require control modules, such as those for speed control of motors, which need to be installed inside the machine's casing. However, these machines are mostly non-sealed structures, and over time, dust or water can easily accumulate, causing corrosion to the circuit boards and affecting their control functions. Therefore, obtaining a corrosion-resistant control module is very important. Utility Model Content

[0003] To solve at least one of the above-mentioned technical problems, this utility model provides a corrosion-resistant control module, including a circuit board and a control chip mounted on the upper surface of the circuit board. The circuit board has a first through hole and a second through hole. A first connector is fixed in the first through hole, and a second connector is fixed in the second through hole. The connection interface of the first connector and the second connector passes through the first through hole, and the second through hole is located on the lower surface of the circuit board facing downward. The output terminal of the control chip is electrically connected to the second connector through a drive circuit, and the first connector is electrically connected to the power supply terminal of the control chip. The drive circuit is soldered to the circuit board, and the upper surface of the circuit board is encapsulated with an insulating resin layer.

[0004] Through the above technical solution, the circuit board surface of this utility model is encapsulated with an insulating resin layer, which can block corrosive substances such as moisture and salt. Several grooves can be formed on the insulating resin layer. The grooves do not connect the internal components with the outside world, and the grooves have a heat dissipation function.

[0005] The driving circuit includes a first MOSFET, whose gate (G) is connected to the control output terminal of the control chip, its source (S) is grounded, and its drain (D) is connected to a second connector. The second connector is used to connect to a working component. The drain of the first MOSFET is connected to the second connector via a diode, and the first connector is connected to the diode. The working component can be a motor, electric motor, etc. The first connector is used to connect to a battery.

[0006] The circuit board's connecting wires are soldered together or directly electrically connected via solder wires.

[0007] The first connector and the second connector are pin headers.

[0008] The pin header is bent on at least one side to form a bent-leg pin header.

[0009] The pin header includes a housing, which is L-shaped and fixed in the first and second through holes by insulating resin, so that the bent pins are parallel to the circuit board and output from the bottom surface of the circuit board to the outside.

[0010] Compared with the prior art, the advantages of this utility model are: the structure of this utility model is simple, the external connection port of the connector is located below the circuit board, which is less likely to accumulate dust compared to the connection port of the connector above the circuit board. The connector and the controller are connected by wires or solder wires and are encapsulated in an insulating resin layer to prevent corrosion. Attached Figure Description

[0011] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0012] Figure 2 This is the circuit diagram of this utility model;

[0013] Figure label:

[0014] 1 Circuit board; U1 Control chip; 3 First through hole; 4 Second through hole; J1 First connector; J2 Second connector; 7 Insulating resin layer; 8 Groove strip; 9 First MOSFET; 10 Diode; 11 Housing; 12 Pin header; 13 Wire. Detailed Implementation

[0015] To enable those skilled in the art to better understand this utility model and to more clearly define the scope of protection claimed by this utility model, the present utility model is described in detail below with reference to certain specific embodiments. It should be noted that the following are only some specific embodiments of the present utility model concept, and are only a part of the embodiments of this utility model. The specific and direct description of related structures is only for the convenience of understanding this utility model, and the specific features do not necessarily or directly limit the scope of implementation of this utility model.

[0016] Referring to the accompanying drawings, this utility model adopts the following technical solution: This utility model provides a corrosion-resistant control module, including a circuit board 1 and a control chip U1 mounted on the upper surface of the circuit board 1. The circuit board 1 has a first through hole 3 and a second through hole 4. A first connector J1 is fixed in the first through hole 3, and a second connector J2 is fixed in the second through hole 4. The connection interface of the first connector J1 and the second connector J2 passes through the first through hole 3, and the second through hole 4 is located on the lower surface of the circuit board 1 facing downward. The output terminal of the control chip U1 is electrically connected to the second connector J2 through a drive circuit, and the first connector J1 is electrically connected to the power supply terminal of the control chip U1. The drive circuit is soldered onto the circuit board 1, and an insulating resin layer 7 is fixed on the upper surface of the circuit board 1.

[0017] Through the above technical solution, the circuit board 1 of this utility model is encapsulated with an insulating resin layer 7, which can block corrosive substances such as moisture and salt. Several groove strips 8 can be formed on the insulating resin layer 7. The groove strips 8 do not connect the internal components with the outside world, and the groove strips 8 have a heat dissipation function.

[0018] The control chip U1 can be an existing chip used for motor speed control.

[0019] The driving circuit includes a first MOSFET 9. The gate (G) of the first MOSFET 9 is connected to the control output terminal of the control chip U1, the source (S) is grounded, and the drain (D) is connected to a second connector J2. The second connector J2 is used to connect to the working component. The drain of the first MOSFET 9 is connected to the second connector J2 through a diode 10. The first connector J1 is connected to the diode 10. The working component can be a motor, electric motor, etc. The first connector J1 is used to connect to a battery.

[0020] The connecting wires of the circuit board 1 are soldered together by wire 13, or directly electrically connected by solder wire.

[0021] The first connector J1 and the second connector J2 are pin headers 12.

[0022] The pin header 12 is bent on at least one side to form a bent-leg pin header 12.

[0023] The pin header 12 includes a housing 11, which is L-shaped and fixed in the first through hole 3 and the second through hole 4 by insulating resin, so that the bent pins are parallel to the circuit board 1 and output from the bottom surface of the circuit board 1 to the outside.

[0024] Compared with the prior art, the advantages of this utility model are: the structure of this utility model is simple, the external connection port of the connector is located below the circuit board 1, which is less likely to accumulate dust than when it is installed above the circuit board 1, and the connector and the controller are connected by wire 13 or solder wire and are encapsulated in the insulating resin layer 7 to prevent corrosion.

[0025] When this invention is put into use, it can be fixed inside the machine casing with screws. That is, the screws can pass through the insulating resin layer and the circuit board to fix the machine casing. The insulating resin layer also plays a role in buffering and reducing vibration.

[0026] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0027] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A corrosion-resistant control module, characterized in that: The device includes a circuit board (1) and a control chip (U1) mounted on the upper surface of the circuit board (1). The circuit board (1) has a first through hole (3) and a second through hole (4). A first connector (J1) is fixed in the first through hole (3), and a second connector (J2) is fixed in the second through hole (4). The connection interface of the first connector (J1) and the second connector (J2) passes through the first through hole (3) and the second through hole (4) is located on the lower surface of the circuit board (1) facing downward. The output terminal of the control chip (U1) is electrically connected to the second connector (J2) through a drive circuit, and the first connector (J1) is electrically connected to the power supply terminal of the control chip (U1). The drive circuit is soldered to the circuit board (1), and the upper surface of the circuit board (1) is encapsulated with an insulating resin layer (7).

2. The corrosion resistance control module according to claim 1, characterized in that: The driving circuit includes a first MOS transistor (9), the gate of the first MOS transistor (9) is connected to the control output terminal of the control chip (U1), the source is grounded, the drain is connected to the second connector (J2), the second connector (J2) is used to connect the working component, the drain is connected to the second connector (J2) through a diode (10), and the first connector (J1) is connected to the diode (10).

3. The corrosion resistance control module according to claim 1, characterized in that: The first connector (J1) is used to connect the battery.

4. The corrosion resistance control module according to claim 1, characterized in that: The connecting wires of the circuit board (1) are soldered together by wires (13) or directly electrically connected by solder wires.

5. The corrosion resistance control module according to claim 1, characterized in that: The first connector (J1) and the second connector (J2) are pin headers (12).

6. The corrosion resistance control module according to claim 5, characterized in that: The pin header (12) is bent on at least one side to form a bent-leg pin header (12).

7. The corrosion resistance control module according to claim 6, characterized in that: The pin header (12) includes a housing (11), which is L-shaped and fixed in the first through hole (3) and the second through hole (4) by insulating resin, so that the bent pins are parallel to the circuit board (1) and output from the bottom surface of the circuit board (1) to the outside.

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