Static contact assembly and switch unit

Abstract

The utility model relates to the technical field of low-voltage electric appliances, and particularly discloses a static contact assembly and a switch unit, the static contact assembly is matched with a moving contact assembly and an arc extinguishing assembly in the switch unit, and the static contact assembly comprises a static contact body and an arc striking structure; the static contact body is provided with a contact part close to the arc extinguishing assembly, and the arc striking structure comprises an arc guide plate which is connected with the static contact body and is located between the contact part and the arc extinguishing assembly; the arc extinguishing assembly comprises a plurality of arc extinguishing grid sheets arranged along the moving path of the moving contact assembly. The arc guide plate is parallel to the arc extinguishing grid sheets close to the contact part, and a preset distance is reserved between the arc guide plate and the arc extinguishing grid sheets. According to the invention, the electric arc can be effectively guided into the arc extinguishing assembly, so that the arc extinguishing assembly can extinguish the electric arc conveniently, and the safety and reliability of the switch unit can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a static contact assembly and a switch unit. Background Art

[0002] When the moving contact assembly and the stationary contact assembly are opened, an arc breakdown usually occurs due to the small internal space of the switch unit housing, resulting in the arc being unable to enter the pre-set arc extinguishing assembly. The arc breakdown problem is particularly prominent in high-voltage switch units, resulting in the arc extinguishing assembly being unable to effectively extinguish the arc, making the safety and reliability of the switch unit poor. Utility Model Content

[0003] The purpose of the present application is to provide a static contact assembly and a switch unit, which can effectively guide the arc to the arc extinguishing assembly, so that the arc extinguishing assembly can extinguish the arc, thereby improving the safety and reliability of the switch unit.

[0004] The embodiment of the present application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a static contact assembly, which is arranged in cooperation with a moving contact assembly and an arc extinguishing assembly, wherein the static contact assembly includes a static contact body and an arc-striking structure; a contact portion close to the arc extinguishing assembly is arranged on the static contact body, and the arc-striking structure includes an arc guide plate connected to the static contact body and located between the contact portion and the arc extinguishing assembly; the arc extinguishing assembly includes a plurality of arc extinguishing grids arranged along the movement path of the moving contact assembly, and the arc guide plate is parallel to the arc extinguishing grid close to the contact portion and a preset spacing is provided between the two.

[0006] As an optional implementation manner, a protrusion is provided on a side of the contact portion close to the arc guide plate; and a protrusion direction of the protrusion is close to the arc guide plate.

[0007] As an optional implementation, the arc striking structure further includes a connecting portion connected to the arc guide plate, and the arc striking structure is connected to the stationary contact body via the connecting portion.

[0008] As an optional embodiment, the connecting portion and the arc guide plate are integrally formed, and a bending portion is formed at a connection between the connecting portion and the arc guide plate by bending, and the bending portion is located between the protruding portion and the arc extinguishing grid close to the contact portion, and the bending portion and the protruding portion are arranged along the movement path of the moving contact assembly.

[0009] As an optional implementation, the stationary contact body includes a wiring board, and the contact part is vertically arranged on the wiring board to form a T-shaped structure.

[0010] As an optional embodiment, the arc striking structure also includes a connecting portion connected to the arc guide plate, and the connecting portion includes two connecting plates symmetrical about the plane where the contact portion is located; the two connecting plates are respectively fixed to the two ends of the T-shaped structural member through set connecting pieces.

[0011] As an optional embodiment, the contact part has a connecting edge that abuts against or separates from the moving contact assembly, the extending direction of the connecting edge intersects with the plane where the arc guide plate is located, and the protrusion is arranged at one end of the connecting edge close to the arc guide plate.

[0012] As an optional implementation manner, the preset spacing is 0.5-1.5 times the spacing between adjacent arc-extinguishing grids.

[0013] In a second aspect, an embodiment of the present application provides a switch unit, comprising a shell and a moving contact assembly, an arc extinguishing assembly and the above-mentioned stationary contact assembly arranged in the shell; the arc extinguishing assembly and the stationary contact assembly are arranged along the movement path of the moving contact assembly.

[0014] As an optional implementation, a slot is provided in the shell; the arc guide plate is engaged with the slot.

[0015] The beneficial effects of the embodiments of the present application include:

[0016] In the first aspect, the embodiment of the present application provides a static contact assembly, which is arranged in cooperation with a moving contact assembly and an arc extinguishing assembly. The static contact assembly of the embodiment of the present application includes a static contact body and an arc striking structure; a contact portion close to the arc extinguishing assembly is arranged on the static contact body, and the arc striking structure includes an arc guide plate connected to the static contact body and located between the contact portion and the arc extinguishing assembly; the arc extinguishing assembly of the embodiment of the present application includes a plurality of arc extinguishing grids arranged along the moving path of the moving contact assembly, and the arc guide plate is parallel to the arc extinguishing grid close to the contact portion and the two are preset at a distance. The embodiment of the present application arranges the arc guide plate in parallel with the arc extinguishing grid close to the contact portion, so that the arc guide plate can cooperate with the arc extinguishing grid of the arc extinguishing assembly, wherein the arc guide plate can guide the arc on the static contact body to the arc extinguishing grid close to it, so that the arc can effectively enter the arc extinguishing chamber, which is convenient for the arc extinguishing assembly to extinguish the arc, thereby improving the safety and reliability of the switch unit.

[0017] In the second aspect, the embodiment of the present application provides a switch unit, including a housing, a moving contact assembly, an arc extinguishing assembly and the above-mentioned stationary contact assembly arranged in the housing; the arc extinguishing assembly and the stationary contact assembly are arranged along the movement path of the moving contact assembly. The switch unit provided by the embodiment of the present application can transfer the arc on the stationary contact body to the arc extinguishing assembly through the arrangement of the arc guide plate, so as to avoid the arc from causing ablation to the structure outside the arc extinguishing assembly, and facilitate the arc extinguishing assembly to extinguish the arc, thereby improving the safety and reliability of the switch unit and increasing the service life of the switch unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the structure of the switch unit according to the embodiment of the present application;

[0020] Figure 2 This is one of the structural schematic diagrams of the static contact assembly of the embodiment of the present application;

[0021] Figure 3 This is the second structural schematic diagram of the static contact assembly of the embodiment of the present application;

[0022] Figure 4 This is the third structural diagram of the static contact assembly of the embodiment of the present application;

[0023] Figure 5 This is the fourth structural schematic diagram of the static contact assembly of the embodiment of the present application.

[0024] Icons: 100-moving contact assembly; 101-arc extinguishing assembly; 102-static contact body; 103-arc striking structure; 104-contact part; 105-arc guide plate; 106-arc extinguishing grid; 107-protrusion; 108-connecting part; 109-bending part; 110-slot; 111-terminal block; 112-connecting piece; 113-arc jump path; 114-connecting edge; 115-T-shaped structural part. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0027] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0028] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] When the moving contact assembly 100 and the stationary contact assembly are opened, an arc breakdown usually occurs due to the small internal space of the switch unit housing, resulting in the arc being unable to enter the pre-set arc extinguishing assembly 101. In particular, in high-voltage switch units, the arc breakdown problem is more prominent, resulting in the arc extinguishing assembly 101 being unable to effectively extinguish the arc, resulting in poor safety and reliability of the switch unit.

[0030] In order to solve the above technical problems, an embodiment of the present application provides a static contact assembly and a switch unit.

[0031] Reference Figure 1 and Figure 2As shown, a static contact assembly provided in an embodiment of the present application is arranged in cooperation with a moving contact assembly 100 and an arc extinguishing assembly 101, the static contact assembly includes a static contact body 102 and an arc striking structure 103; a contact portion 104 close to the arc extinguishing assembly 101 is arranged on the static contact body 102, the arc striking structure 103 includes an arc guide plate 105 connected to the static contact body 102 and located between the contact portion 104 and the arc extinguishing assembly 101; the arc extinguishing assembly 101 includes a plurality of arc extinguishing grids 106 arranged along the moving path of the moving contact assembly 100, the arc guide plates 105 are parallel to the arc extinguishing grids 106 close to the contact portion 104 and a preset distance is set between the two.

[0032] It should be noted that the static contact assembly provided in the embodiment of the present application is arranged in cooperation with the moving contact assembly 100 and the arc extinguishing assembly 101 in the switch unit. The static contact assembly and the moving contact assembly 100 generate an arc when opening the switch. The arc extinguishing assembly 101 in the embodiment of the present application includes a plurality of arc extinguishing grids 106 arranged along the moving path of the moving contact assembly 100, that is, the arc extinguishing grids 106 intersect with the arc extension direction on the moving contact assembly 100, so that the arc extinguishing grids 106 can extinguish the arc.

[0033] It should be noted that the arc on the static contact assembly is far away from the arc extinguishing grid 106 and is difficult to enter the arc extinguishing assembly 101. Since it cannot be extinguished quickly, the arc on the static contact assembly usually stays for a long time, causing more serious ablation of the static contact assembly, resulting in a reduction in the service life of the static contact assembly.

[0034] In the embodiment of the present application, an arc guide plate 105 is arranged on the static contact assembly, and the arc guide plate 105 is arranged between the contact part 104 and the arc extinguishing assembly 101. When the static contact assembly and the moving contact assembly 100 are disconnected and an arc is generated, the arc guide plate 105 can guide the arc on the static contact assembly to the arc extinguishing assembly 101, so that the arc can be quickly extinguished through the arc extinguishing assembly 101, thereby effectively improving the safety and reliability of the switch unit.

[0035] Reference Figure 1 and Figure 3 As shown, as an optional implementation, the arc guide plate 105 is parallel to the arc extinguishing grid 106 close to the contact part 104 and there is a preset distance between the two, wherein the preset distance is 0.5-1.5 times the distance between adjacent arc extinguishing grids 106 .

[0036] It should be noted that the specific size of the preset spacing can be selected by those skilled in the art according to needs, and there is no special limitation on this.

[0037] Exemplarily, the preset spacing is 0.5 times the spacing between adjacent arc-extinguishing grids 106 .

[0038] Exemplarily, the preset spacing is 1.5 times the spacing between adjacent arc-extinguishing grids 106 .

[0039] Exemplarily, the preset spacing is consistent with the spacing between adjacent arc-extinguishing grids 106 .

[0040] The embodiment of the present application provides a static contact assembly, which is arranged in cooperation with a moving contact assembly 100 and an arc extinguishing assembly 101. The static contact assembly of the embodiment of the present application includes a static contact body 102 and an arc-striking structure 103; a contact portion 104 close to the arc extinguishing assembly 101 is provided on the static contact body 102, and the arc-striking structure 103 includes an arc guide plate 105 connected to the static contact body 102 and located between the contact portion 104 and the arc extinguishing assembly 101; the arc extinguishing assembly 101 of the embodiment of the present application includes a plurality of arc extinguishing grids 106 arranged along the movement path of the moving contact assembly 100, and the arc guide plates 105 are parallel to the arc extinguishing grids 106 close to the contact portion 104 and a preset distance is provided between the two.

[0041] In the embodiment of the present application, the arc guide plate 105 is arranged in parallel with the arc extinguishing grid 106 close to the contact part 104, so that the arc guide plate 105 can cooperate with the arc extinguishing grid 106 of the arc extinguishing assembly 101, wherein the arc guide plate 105 can guide the arc on the static contact body 102 to the arc extinguishing grid 106 close thereto, so that the arc can effectively enter the arc extinguishing chamber, which is convenient for the arc extinguishing assembly 101 to extinguish the arc, thereby improving the safety and reliability of the switch unit.

[0042] Reference Figure 2 and Figure 3 As shown, as an optional implementation, a protrusion 107 is provided on one side of the contact portion 104 close to the arc guide plate 105 ; the protrusion direction of the protrusion 107 is close to the arc guide plate 105 .

[0043] Furthermore, a protrusion 107 is provided on one side of the contact portion 104 close to the arc guide plate 105 in the embodiment of the present application, and the protrusion direction of the protrusion 107 is close to the arc guide plate 105. The embodiment of the present application enables the contact portion 104 to perform tip discharge through the protrusion 107 through the provision of the protrusion 107. By providing the protrusion 107 close to the arc guide plate 105, the arc derived from the protrusion 107 can quickly and accurately reach the arc guide plate 105, thereby facilitating the arc guide plate 105 to guide the transfer of the arc.

[0044] It should be noted that the specific shape of the protrusion 107 can be set by those skilled in the art as required, and there is no special limitation on this.

[0045] As an optional embodiment, the contact part 104 has a connecting edge 114 that abuts against or separates from the moving contact assembly 100, and the extending direction of the connecting edge 114 intersects with the plane where the arc guide plate 105 is located, and the protrusion 107 is arranged at one end of the connecting edge 114 close to the arc guide plate 105.

[0046] Furthermore, in the embodiment of the present application, the connecting edge 114 is provided so that the position of the protrusion 107 can be more prominent, which is more conducive to the transfer of the arc to the arc guide plate 105.

[0047] It should be noted that the connecting edge 114 is the edge of the contact part 104, and the other end of the contact part 104 is connected to the wiring board 111. Figure 2 As shown, the connecting edge 114 is specifically arranged on the side of the contact part 104 away from the wiring board 111 .

[0048] Reference Figure 2 and Figure 4 As shown, as an optional implementation, the arc striking structure 103 further includes a connecting portion 108 connected to the arc guide plate 105 , and the arc striking structure 103 is connected to the stationary contact body 102 via the connecting portion 108 .

[0049] In the embodiment of the present application, the arc guide plate 105 can be directly connected to the stationary contact body 102 through the connecting portion 108 , thereby achieving a reliable connection between the arc guide plate 105 and the stationary contact body 102 .

[0050] It should be noted that the arc guide plate 105 and the connecting portion 108 of the arc striking structure 103 may be integrally formed, or may be formed by connecting two independent structures.

[0051] Reference Figure 2 and Figure 4 As shown, exemplarily, the connecting portion 108 and the arc guide plate 105 are integrally formed, and the connection between the connecting portion 108 and the arc guide plate 105 is bent to form a bent portion 109, and the bent portion 109 is located between the protruding portion 107 and the arc extinguishing grid 106 close to the contact portion 104, and the bent portion 109 and the protruding portion 107 are arranged along the movement path of the moving contact assembly 100.

[0052] It should be noted that the connection portion 108 is bent and connected to the arc guide plate 105, and the angle between the plane where the connection portion 108 is located and the plane where the arc guide plate 105 is located is 30-50°. Those skilled in the art can set this as needed.

[0053] It should be noted that the bent portion 109 and the raised portion 107 are arranged along the moving path of the moving contact assembly 100 .

[0054] Reference Figure 3As shown in the arc jump path 113, after the arc on the static contact assembly is released through the tip of the protrusion 107, the arc jumps to the adjacent bending portion 109, and after passing through the bending portion 109, the arc is transferred to the arc guide plate 105, and then penetrates the adjacent preset spacing through the arc guide plate 105 to reach the arc extinguishing grid 106, forming a gradient transfer of the arc as a whole, and finally accurately enters the arc extinguishing chamber formed by the arc extinguishing assembly 101 to achieve effective arc extinguishing.

[0055] Reference Figure 4 As shown, as an optional implementation, a slot 110 is provided in the switch unit; one end of the arc guide plate 105 away from the bending portion 109 is embedded in the slot 110 .

[0056] Furthermore, in the embodiment of the present application, a slot 110 is provided in the switch unit, and one end of the arc guide plate 105 away from the bent portion 109 is engaged with the slot 110. It should be noted that the end of the connecting portion 108 is also connected to the stationary contact assembly, and by connecting and fixing the two ends of the arc striking structure 103, the installation stability of the arc striking structure 103 is greatly improved.

[0057] Reference Figure 5 As shown, as an optional implementation, the stationary contact body 102 includes a wiring board 111 , and the contact part 104 is vertically arranged on the wiring board 111 to form a T-shaped structural member 115 .

[0058] The arc striking structure 103 further includes a connecting portion 108 connected to the arc guide plate 105 , and the connecting portion 108 includes two connecting plates symmetrical about the plane where the contact portion 104 is located; the two connecting plates are fixed to both ends of the T-shaped structural member 115 through the provided connecting members 112 .

[0059] The two connecting plates of the embodiment of the present application are fixed to the two ends of the T-shaped structural member 115, wherein the connecting member 112 may be a rivet, a screw, or other connecting members 112, which those skilled in the art may select according to their needs.

[0060] It should be noted that the embodiment of the present application can further enhance the reliability of the installation of the arc striking structure 103 through two connecting plates.

[0061] Reference Figure 1 As shown, an embodiment of the present application provides a switch unit, including a shell and a moving contact assembly 100, an arc extinguishing assembly 101 and the above-mentioned stationary contact assembly arranged in the shell; the arc extinguishing assembly 101 and the stationary contact assembly are arranged along the movement path of the moving contact assembly 100.

[0062] The switch unit provided in the embodiment of the present application can transfer the arc on the static contact body 102 to the arc extinguishing assembly 101 through the provision of the arc guide plate 105, thereby preventing the arc from burning the structure outside the arc extinguishing assembly 101 and facilitating the arc extinguishing assembly 101 to extinguish the arc, thereby improving the safety and reliability of the switch unit and increasing the service life of the switch unit.

[0063] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A static contact assembly, arranged in cooperation with a moving contact assembly (100) and an arc extinguishing assembly (101), characterized in that: The stationary contact assembly comprises a stationary contact body (102) and an arc striking structure (103); a contact portion (104) close to the arc extinguishing assembly (101) is arranged on the stationary contact body (102); the arc striking structure (103) comprises an arc guide plate (105) connected to the stationary contact body (102) and located between the contact portion (104) and the arc extinguishing assembly (101); the arc extinguishing assembly (101) comprises a plurality of arc extinguishing grids (106) arranged along a moving path of the moving contact assembly (100); the arc guide plate (105) is parallel to the arc extinguishing grid (106) close to the contact portion (104), and a preset spacing is provided between the two.

2. The stationary contact assembly according to claim 1, characterized in that: A protrusion (107) is provided on one side of the contact portion (104) close to the arc guide plate (105); the protrusion direction of the protrusion (107) is close to the arc guide plate (105).

3. The stationary contact assembly according to claim 2, characterized in that: The arc striking structure (103) further comprises a connecting portion (108) connected to the arc guide plate (105), and the arc striking structure (103) is connected to the stationary contact body (102) via the connecting portion (108).

4. The stationary contact assembly according to claim 3, characterized in that: The connecting portion (108) and the arc guide plate (105) are integrally formed, and a bent portion (109) is formed at a connection point between the connecting portion (108) and the arc guide plate (105) by bending, and the bent portion (109) is located between the protruding portion (107) and an arc extinguishing grid (106) close to the contact portion (104), and the bent portion (109) and the protruding portion (107) are arranged along a movement path of the moving contact assembly (100).

5. The stationary contact assembly according to claim 1, characterized in that: The stationary contact body (102) comprises a wiring board (111), and the contact part (104) is vertically arranged on the wiring board (111) to form a T-shaped structural part (115).

6. The stationary contact assembly according to claim 5, characterized in that: The arc striking structure (103) further comprises a connecting portion (108) connected to the arc guide plate (105), wherein the connecting portion (108) comprises two connecting plates symmetrical about the plane where the contact portion (104) is located; the two connecting plates are respectively fixed to the two ends of the T-shaped structural member via connecting pieces (112).

7. The stationary contact assembly according to claim 2, characterized in that: The contact part (104) has a connecting ridge (114) that abuts against or separates from the moving contact assembly (100); the extending direction of the connecting ridge (114) intersects with the plane where the arc guide plate (105) is located; and the protrusion (107) is arranged at one end of the connecting ridge (114) close to the arc guide plate (105).

8. The stationary contact assembly according to claim 1, characterized in that: The preset spacing is 0.5-1.5 times the spacing between adjacent arc-extinguishing grids (106).

9. A switch unit, characterized in that: It comprises a shell, a moving contact assembly (100), an arc extinguishing assembly (101) and a stationary contact assembly as claimed in any one of claims 1 to 8, and the arc extinguishing assembly (101) and the stationary contact assembly are arranged along the movement path of the moving contact assembly (100).

10. The switch unit according to claim 9, characterized in that A clamping slot (110) is provided in the housing; the arc guide plate (105) is clamped in cooperation with the clamping slot (110).

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