Switch

Abstract

A switch belongs to the technical field of low-voltage apparatuses. Comprising a shell, a current transformer arranged in the shell, an electronic module arranged above the current transformer and a current-conducting plate, the current-conducting plate penetrates through the current transformer, the part, exposed out of the shell, of the current-conducting plate forms a wiring terminal of a switch, and the electronic module comprises a first circuit board and a second circuit board which are connected with each other. The first circuit board is transversely arranged above the current transformer, and the second circuit board is vertically arranged below the first circuit board and located between the current transformer and the wiring terminal. The electronic module has the advantages of simple and reasonable structural design, compact structure and small occupied space.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-voltage electrical appliances, and in particular relates to a switch. Background Art

[0002] Switching electrical appliances play two roles in the power system: one is the control role, that is, according to the needs of the power system operation, a part of the power equipment or line is put into or out of operation; the other is the protection role, that is, when a power equipment or line fails, the faulty part is quickly removed from the power system to ensure the normal operation of the fault-free part of the power system. Switches have become an important part of the construction of the power Internet of Things. In addition to the basic functions of overload and short-circuit protection, switches also need to have high-precision metering functions, communication functions, and full perception of the switch operation status. At present, smart switches have met the above requirements and can realize the above functions, but the structure of the electronic module is relatively complex and occupies a large space, and there is still room for improvement.

[0003] In view of the above-mentioned prior art, it is necessary to improve the structure of the electronic module in the existing switch. To this end, the applicant has made a useful design. The technical solution to be introduced below is produced in this context. Utility Model Content

[0004] The utility model aims to provide a switch, the electronic module structure design of which is simpler, more reasonable, more compact and occupies less space.

[0005] The purpose of the utility model is achieved in this way. A switch comprises: a shell, a current transformer arranged in the shell, an electronic module arranged above the current transformer, and a conductive plate, wherein the conductive plate passes through the current transformer, and the portion exposed from the shell constitutes a wiring terminal of the switch, wherein the electronic module comprises a first circuit board and a second circuit board connected to each other, and is characterized in that: the first circuit board is horizontally arranged above the current transformer, and the second circuit board is vertically arranged below the first circuit board and is located between the current transformer and the wiring terminal.

[0006] In a specific embodiment of the present invention, the electronic module further comprises a circuit board mounting base, and the first circuit board and the second circuit board are mounted in the circuit board mounting base.

[0007] In another specific embodiment of the utility model, the circuit board mounting base has a cavity opening upward, a first accommodating cavity adapted to the first circuit board is formed in the cavity, a plurality of bosses are arranged at intervals in the first accommodating cavity, and the circuit board mounting base has buckles arranged at intervals corresponding to the first circuit board on the four edges of the opening, and the first circuit board is placed on the bosses and fixed by the buckles.

[0008] In another specific embodiment of the utility model, the circuit board mounting base forms a second accommodating cavity adapted to the second circuit board in the cavity, and a downwardly opening clearance cavity for cooperating with the current transformer is provided on the side of the second accommodating cavity facing the current transformer.

[0009] In another specific embodiment of the present invention, the circuit board mounting base is provided with openings spaced apart at the bottom of the outer wall of the second accommodating cavity on the side facing the connecting terminal, and the connecting wires on the second circuit board are connected to the conductive plate through the openings.

[0010] In another specific embodiment of the present invention, there is a gap of at least 1 mm between the circuit board mounting base and the conductive plate.

[0011] In a further specific embodiment of the utility model, the first circuit board and the second circuit board divide the circuit board mounting base into three areas, the area located on the side of the second circuit board facing the current transformer constitutes the first area, the area located on the side of the second circuit board facing the terminal constitutes the second area, and the area above the first circuit board constitutes the third area, the second circuit board is provided with components with relatively high temperature resistance on the side close to the first area, and components with relatively medium temperature resistance on the side close to the second area; the first circuit board is provided with components with relatively high temperature resistance on the side close to the first area, components with medium temperature resistance on the side close to the second area, and components with relatively low temperature resistance on the side close to the third area.

[0012] In a more specific embodiment of the present invention, the flow area among the first area, the second area and the third area is less than 10% of the boundary area among the three areas.

[0013] In yet another specific embodiment of the present invention, the first circuit board is a control board for sorting and outputting switch sampling signals, and the second circuit board is a sampling board for sampling switch electrical parameters.

[0014] In yet another specific embodiment of the present invention, the current transformer is installed on the conductive plate in a herringbone structure.

[0015] Due to the adoption of the above structure, the utility model has the following beneficial effects compared with the prior art: the current transformer has both metering and protection functions, and cooperates with the electronic module so that the switch has metering function, communication function and state perception function, which is conducive to realizing the remote tripping function; the electronic module structure is simpler, more reasonable and compact, and occupies less space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view in the length direction of the utility model;

[0017] Figure 2 It is a cross-sectional view of the utility model in the width direction;

[0018] Figure 3 This is a schematic diagram of the assembly of the electronic module described in the utility model;

[0019] Figure 4 This is a front structural schematic diagram of the circuit board mounting base described in the utility model;

[0020] Figure 5 It is a schematic diagram of the give way cavity on the circuit board mounting base described in the utility model.

[0021] In the figure: 1. shell; 2. conductive plate; 21. terminal; 3. current transformer; 4. electronic module, 41. circuit board mounting base, 411. first accommodating cavity, 4111. boss, 4112. buckle, 412. second accommodating cavity, 413. clearance cavity, 414. opening, 42. first circuit board, 421. upper surface, 43. second circuit board, 45. first area, 46. second area, 47. third area. DETAILED DESCRIPTION

[0022] The specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings, but the description of the embodiments is not a limitation of the technical solution. Any changes in form rather than substance based on the concept of the present invention should be regarded as the protection scope of the present invention.

[0023] In the following description, all concepts related to directionality (or orientation) such as up, down, left, right, front and back are referring to the position state of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be understood as special limitations on the technical solutions provided by the present utility model.

[0024] See also Figure 1 The utility model relates to a switch, including a housing 1, an operating mechanism and a plurality of main circuits assembled in the housing 1, each of which includes a conductive plate 2, a current transformer 3, and an electronic module 4. The conductive plate 2 passes through the current transformer 3, and the portion exposed from the housing 1 constitutes a connection terminal 21 of the switch. The electronic module 4 is installed above the conductive plate 2, and the current transformer 3 is sleeved on the conductive plate 2 to collect switch signals and transmit them to the electronic module 4. The current transformer 3 has both metering and protection functions, so that the switch has metering function, communication function and state perception function, which is conducive to realizing the remote tripping function.

[0025] See also Figure 3 , Figure 4 , the electronic module 4 includes a circuit board mounting base 41, and a first circuit board 42 and a second circuit board 43 arranged in the circuit board mounting base 41. The first circuit board 42 is horizontally arranged above the current transformer 3, and the second circuit board 43 is vertically arranged below the first circuit board 42 and is located between the current transformer 3 and the terminal 21. In this embodiment, the first circuit board 42 and the second circuit board 43 adopt an integrated L-shaped structure, that is, one side of the L-shaped structure is placed above the current transformer 3, and the other side of the L-shaped structure is located between the current transformer 3 and the terminal 21. The first circuit board 42 is a control board that organizes and outputs the switch sampling signal, and the second circuit board 43 is a sampling board that samples the electrical parameters of the switch. Preferably, the sampling board is a voltage sampling board for collecting the voltage parameters of the switch.

[0026] The circuit board mounting base 41 has an upwardly open cavity, in which a first accommodating cavity 411 adapted to the first circuit board 42 and a second accommodating cavity 412 adapted to the second circuit board 43 are formed, and a plurality of bosses 4111 are arranged at intervals in the first accommodating cavity 411. The circuit board mounting base 41 has buckles 4112 arranged at intervals corresponding to the first circuit board 42 on the edges of the opening, and the buckles 4112 are clamped on the upper surface 421 of the first circuit board 42 to fix the first circuit board 42 and the second circuit board 43. The circuit board mounting base 41 is bent and extended toward one side at one end in the length direction to form an L-shaped structure, and the first accommodating cavity 411 and the first circuit board 42 are also L-shaped structures correspondingly. The number of the clips 4112 can be set according to the area of ​​the circuit board. In this embodiment, three clips 4112 are provided, which are respectively provided at the two ends of the first accommodating cavity 411 close to the second accommodating cavity 412 and the end of the L-shaped structure away from the second accommodating cavity 412. The three clips 4112 are distributed in a triangular shape. The circuit board mounting base 41 is provided with openings 414 at intervals at the bottom of the outer wall of the second accommodating cavity 412 facing the wiring terminal 21. The connecting wires (not shown in the figure) on the second circuit board 43 are connected to the conductive plate 2 through the openings 414.

[0027] See also Figure 2 and Figure 5The circuit board mounting base 41 is provided with a downwardly opening clearance cavity 413 for cooperating with the current transformer 3 on the side of the second accommodating cavity 412 facing the current transformer 3, and the shape of the clearance cavity 413 is determined according to the shape of the current transformer 3. In this embodiment, the shape of the current transformer 3 is circular, and the clearance cavity 413 is constituted as a semicircular cavity that makes way for the upper half of the current transformer 3. If the shape of the current transformer 3 is square or other, the shape of the clearance cavity 413 is also changed accordingly. At the same time, the arrangement of the current transformer 3 of the switch is generally a straight-line structure installed on the conductive plate 2. In this embodiment, the current transformer 3 is installed on the conductive plate 2 in a herringbone structure.

[0028] Please continue to see Figure 1 When the electronic module 4 is installed on the conductive plate 2, there needs to be a gap of at least 1 mm between the circuit board mounting base 41 and the conductive plate 2 to prevent the heat on the conductive plate 2 from being transferred to the first circuit board 42 through the circuit board mounting base 41, causing damage to the components on the first circuit board 42. After the first circuit board 42 and the second circuit board 43 are installed in the circuit board mounting base 41, the electronic module 4 is divided into three areas: the area located on the side of the second circuit board 43 facing the current transformer 3 is constituted as the first area 45, the area located on the side of the second circuit board 43 facing the wiring terminal 21 is constituted as the second area 46, and the area above the first circuit board 42 is constituted as the third area 47. The second circuit board 43 is provided with components with relatively high temperature resistance on the side close to the first area 45, and components with relatively medium temperature resistance on the side close to the second area 46; the first circuit board 42 is provided with components with relatively high temperature resistance on the side close to the first area 45, components with medium temperature resistance on the side close to the second area 46, and components with relatively low temperature resistance on the side close to the third area 47. The flow area between the first area 45, the second area 46 and the third area 47 is less than 10% of the interface area between the three. There is no significant convection between the three, forming three different temperature zones, which is conducive to improving the stability of components.

[0029] The circuit board base 41 completely separates the first circuit board 42 and the second circuit board 43 from the conductive plate 2, ensuring that the heat generated by the conductive plate 2 will not be directly radiated to the first circuit board 42 and the second circuit board 43; it also ensures that the first circuit board 42 and the second circuit board 43 will not be contaminated by high-temperature metal vapor when the switch is disconnected, thereby improving the stability and safety of the product.

Claims

1. A switch, comprising: A housing (1), a current transformer (3) arranged in the housing (1), an electronic module (4) arranged above the current transformer (3), and a conductive plate (2), wherein the conductive plate (2) passes through the current transformer (3), and the portion exposed from the housing (1) constitutes a connection terminal (21) of a switch, and the electronic module (4) comprises a first circuit board (42) and a second circuit board (43) connected to each other, characterized in that: the first circuit board (42) is arranged horizontally above the current transformer (3), and the second circuit board (43) is arranged vertically below the first circuit board (42) and is located between the current transformer (3) and the connection terminal (21).

2. The switch according to claim 1, characterized in that: The electronic module (4) further comprises a circuit board mounting base (41), and the first circuit board (42) and the second circuit board (43) are mounted in the circuit board mounting base (41).

3. The switch according to claim 2, characterized in that: The circuit board mounting base (41) has a cavity opening upwards, a first accommodating cavity (411) adapted to the first circuit board (42) is formed in the cavity, a plurality of bosses (4111) are arranged at intervals in the first accommodating cavity (411), and buckles (4112) are arranged at intervals on the four edges of the opening of the circuit board mounting base (41) corresponding to the first circuit board (42), and the first circuit board (42) is placed on the bosses (4111) and fixed by the buckles (4112).

4. The switch according to claim 2, characterized in that: The circuit board mounting base (41) has a second accommodating cavity (412) adapted to the second circuit board (43) formed in the cavity, and a downwardly opening clearance cavity (413) for cooperating with the current transformer (3) is provided on the side of the second accommodating cavity (412) facing the current transformer (3).

5. The switch according to claim 4, characterized in that: The circuit board mounting base (41) is provided with openings (414) at intervals at the bottom of the outer wall of the second accommodating cavity (412) on the side facing the connecting terminal (21), and the connecting wires on the second circuit board (43) are connected to the conductive plate (2) through the openings (414).

6. The switch according to claim 2, characterized in that: There is a gap of at least 1 mm between the circuit board mounting base (41) and the conductive plate (2).

7. The switch according to claim 2, characterized in that: The first circuit board (42) and the second circuit board (43) divide the circuit board mounting base (41) into three areas, the area located on the side of the second circuit board (43) facing the current transformer (3) constitutes a first area (45), the area located on the side of the second circuit board (43) facing the connection terminal (21) constitutes a second area (46), and the area located above the first circuit board (42) constitutes a third area (47). The second circuit board (43) is provided with components with relatively high temperature resistance on the side close to the first area (45), and components with relatively medium temperature resistance on the side close to the second area (46); the first circuit board (42) is provided with components with relatively high temperature resistance on the side close to the first area (45), components with medium temperature resistance on the side close to the second area (46), and components with relatively low temperature resistance on the side close to the third area (47).

8. The switch according to claim 7, characterized in that: The flow area between the first region (45), the second region (46) and the third region (47) is less than 10% of the interface area between the three regions.

9. The switch according to claim 1, characterized in that: The first circuit board (42) is a control board for sorting and outputting switch sampling signals, and the second circuit board (43) is a sampling board for sampling switch electrical parameters.

10. The switch according to claim 1, characterized in that: The current transformer (3) is installed on the conductive plate (2) in a herringbone structure.

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