Direct-current contactor shell and direct-current contactor

Abstract

The utility model relates to the technical field of low-voltage switches, and particularly discloses a direct-current contactor shell and a direct-current contactor, the direct-current contactor shell comprises a transparent glass shell, the transparent glass shell is provided with an internal cavity capable of accommodating a moving contact system, the transparent glass shell is provided with a mounting hole, and the transparent glass shell is provided with a binding post arranged in the mounting hole in a penetrating manner; kovar sealing sleeves for sealing are arranged between the mounting holes and the binding posts; the kovar sealing sleeve is sleeved on the outer side wall of the binding post, and the inner side surface of the kovar sealing sleeve is attached to the outer side wall of the binding post; the outer side face of the Kovar sealing sleeve is attached to the inner wall of the mounting hole. The high-temperature-resistant and high-pressure-resistant cable is convenient to produce and has good gas tightness and excellent high-temperature-resistant performance, meanwhile, hydrogen can be used as protective gas, and the arc blocking performance can be improved conveniently.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage switches, and in particular to a DC contactor housing and a DC contactor. Background Art

[0002] At present, DC contactors usually adopt ceramic and epoxy packaging methods, in which ceramic shells usually produce microcracks, which makes the sealing of the internal chamber poor, resulting in easy leakage of the sealed arc-extinguishing protective gas. In addition, the processing and manufacturing cycle of ceramic arc-extinguishing chambers is long and the cost is high. Since hydrogen has good reducibility and the gas molecules are active, it is easier to collide with electrons at the arc escape, thereby producing an arc blocking effect. Therefore, hydrogen is usually the first choice as a protective gas in the arc-extinguishing chamber, and the shell formed by epoxy resin can only be filled with nitrogen as an arc-extinguishing protective gas, and cannot be filled with hydrogen, resulting in a poor arc blocking effect. In addition, the epoxy resin shell in the prior art is not resistant to high temperatures. When the temperature generated by the moving contact and the static contact is too high, it will cause the epoxy resin shell to deform, resulting in reduced sealing. Utility Model Content

[0003] The purpose of the present application is to provide a DC contactor housing, which is not only easy to produce and has good air tightness, but also has excellent high temperature resistance. At the same time, hydrogen can be used as a protective gas to improve the arc blocking performance.

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

[0005] In the first aspect, an embodiment of the present application provides a DC contactor housing, comprising a transparent glass housing, the transparent glass housing having an internal chamber capable of accommodating a moving contact system, the transparent glass housing having a mounting hole, the transparent glass housing being provided with a terminal inserted into the mounting hole; a kovar sealing sleeve for sealing is provided between the mounting hole and the terminal; the kovar sealing sleeve is sleeved on the outer side wall of the terminal, the inner side surface of the kovar sealing sleeve is in contact with the outer side wall of the terminal; the outer side surface of the kovar sealing sleeve is in contact with the inner wall of the mounting hole.

[0006] As an optional embodiment, the terminal post has a boss, the Kovar sealing sleeve is provided with a Kovar sealing disk that fits with the boss, and the surface of the Kovar sealing disk away from the boss fits with the surface of the transparent glass shell.

[0007] As an optional implementation, the Kovar sealing sleeve and the Kovar sealing disc are integrally formed and made of the same material.

[0008] As an optional embodiment, the central axis of the Kovar sealing sleeve is perpendicular to the plane where the Kovar sealing disk is located.

[0009] As an optional embodiment, the Kovar sealing sleeve is connected to the terminal post by welding and is connected to the transparent glass shell by sintering; and / or the Kovar sealing disk is connected to the terminal post by welding and is connected to the transparent glass shell by sintering.

[0010] As an optional embodiment, it also includes a protective shell body which is mounted on the outside of the transparent glass shell, and a first indicator member and a second indicator member are fixed on the moving contact system, and the first indicator member and the second indicator member are arranged along the movement path of the moving contact system; a side wall of the protective shell body is provided with a visual window located on the movement path; when the moving contact system is opened, the first indicator member corresponds to the visual window, or when the moving contact system is closed, the second indicator member corresponds to the visual window in a flush manner.

[0011] As an optional implementation, a mounting platform is provided on a side of the moving contact system close to the visible window; the plane where the mounting platform is located is parallel to the visible window; and the first indicator and the second indicator are arranged side by side on the mounting platform.

[0012] As an optional embodiment, the first indicator member and the second indicator member are both sheet members attached to the mounting platform; the plane area of ​​the sheet member is greater than or equal to the area of ​​the visible window; the first indicator member or the second indicator member can cover the visible window when it is flush with the visible window.

[0013] As an optional implementation, the first indicator member and the second indicator member are fixed to the mounting platform via a clamping structure; or, the first indicator member and the second indicator member are fixed to the mounting platform via an adhesive connection layer.

[0014] In the second aspect, an embodiment of the present application also provides a DC contactor, comprising the above-mentioned DC contactor housing, drive system and moving contact system; the drive system drives the moving contact system to move linearly and open or close the switch with the terminal in the DC contactor housing.

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

[0016] The DC contactor housing provided in the embodiment of the present application includes a transparent glass housing, the transparent glass housing has an internal chamber that can accommodate a moving contact system, a mounting hole is provided on the transparent glass housing, and a terminal that is inserted into the mounting hole is provided on the transparent glass housing; a sealing sleeve for sealing is provided between the mounting hole and the terminal in the embodiment of the present application; the sealing sleeve is provided on the outer wall of the terminal, and the inner side of the sealing sleeve is in contact with the outer wall of the terminal; the outer side of the sealing sleeve is in contact with the inner wall of the mounting hole. The embodiment of the present application uses transparent glass as the housing, which has strong structural reliability, does not produce microcracks, and effectively improves the sealing performance of the internal chamber. The transparent glass housing provided in the embodiment of the present application is easy to process and manufacture, has a low production cost, and has excellent high temperature resistance. At the same time, hydrogen can also be used as a protective gas to facilitate the improvement of arc blocking performance. In addition, the embodiment of the present application can seal the mounting hole through the setting of the sealing sleeve to avoid leakage of gas inside the internal chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 This is one of the structural schematic diagrams of the DC contactor housing of the embodiment of the present application;

[0019] Figure 2 This is the second structural schematic diagram of the DC contactor housing of the embodiment of the present application;

[0020] Figure 3 This is the third structural schematic diagram of the DC contactor housing of the embodiment of the present application;

[0021] Figure 4 This is the fourth structural schematic diagram of the DC contactor housing of the embodiment of the present application;

[0022] Figure 5 This is the fifth structural schematic diagram of the DC contactor housing of the embodiment of the present application;

[0023] Figure 6 This is the sixth structural schematic diagram of the DC contactor housing according to the embodiment of the present application.

[0024] Icons: 100-protective shell body; 101-installation chamber; 102-moving contact system; 103-first indicator; 104-second indicator; 105-visible window; 106-installation platform; 107-first shell; 108-second shell; 109-shell clamping structure; 110-transparent glass shell; 111-yoke plate; 112-terminal; 113-viable sealing sleeve; 114-viable sealing disk; 115-boss; 116-installation hole. 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] At present, DC contactors usually adopt ceramic and epoxy packaging methods, in which ceramic shells usually produce microcracks, which makes the sealing of the internal chamber poor, resulting in easy leakage of the sealed arc-extinguishing protective gas. In addition, the processing and manufacturing cycle of ceramic arc-extinguishing chambers is long and the cost is high. Since hydrogen has good reducibility and the gas molecules are active, it is easier to collide with electrons at the arc escape, thereby producing an arc blocking effect. Therefore, hydrogen is usually the first choice as a protective gas in the arc-extinguishing chamber, and the shell formed by epoxy resin can only be filled with nitrogen as an arc-extinguishing protective gas, and cannot be filled with hydrogen, resulting in a poor arc blocking effect. In addition, the epoxy resin shell in the prior art is not resistant to high temperatures. When the temperature generated by the moving contact and the static contact is too high, it will cause the epoxy resin shell to deform, resulting in reduced sealing.

[0030] In order to solve the above technical problems, an embodiment of the present application provides a DC contactor housing and a DC contactor.

[0031] Reference Figure 1 and Figure 2 As shown, an embodiment of the present application provides a DC contactor housing, including a transparent glass housing 110, the transparent glass housing 110 having an internal chamber that can accommodate a moving contact system 102, a mounting hole 116 being provided on the transparent glass housing 110, and a terminal 112 penetrating the mounting hole 116 being provided on the transparent glass housing 110; a kovar sealing sleeve 113 for sealing is provided between the mounting hole 116 and the terminal 112; the kovar sealing sleeve 113 is sleeved on the outer side wall of the terminal 112, and the inner side surface of the kovar sealing sleeve 113 is in contact with the outer side wall of the terminal 112; and the outer side surface of the kovar sealing sleeve 113 is in contact with the inner wall of the mounting hole.

[0032] It should be noted that the material grade of the transparent glass housing 110 may be DM308. Other types of electrical glass may also be used.

[0033] The embodiment of the present application uses transparent glass as the shell, which has strong structural reliability, does not produce microcracks, and effectively improves the sealing performance of the internal chamber. The transparent glass shell 110 provided in the embodiment of the present application is easy to process and manufacture, has a low production cost, and has excellent high temperature resistance. Hydrogen can also be used as a protective gas to facilitate the improvement of arc blocking performance. In addition, the embodiment of the present application can seal the installation hole through the setting of the Kovar sealing sleeve 113 to avoid leakage of gas inside the internal chamber.

[0034] Reference Figure 1 and Figure 2 As shown, as an optional embodiment, the terminal 112 has a boss 115, and the kovar sealing sleeve 113 is provided with a kovar sealing disk 114 that is in contact with the boss 115, and the surface of the kovar sealing disk 114 away from the boss 115 is in contact with the surface of the transparent glass shell 110.

[0035] The Kovar sealing sleeve 113 and the Kovar sealing disc 114 are integrally formed and made of the same material. For example, the Kovar sealing sleeve 113 and the Kovar sealing disc 114 are made of 4J29 iron-nickel-cobalt Kovar alloy or 4J33 iron-nickel-cobalt Kovar alloy. The central axis of the Kovar sealing sleeve 113 is perpendicular to the plane where the Kovar sealing disc 114 is located.

[0036] As an optional embodiment, the Kovar sealing sleeve 113 is connected to the terminal post 112 by welding and connected to the transparent glass shell 110 by sintering; and / or the Kovar sealing disk 114 is connected to the terminal post 112 by welding and connected to the transparent glass shell 110 by sintering.

[0037] Furthermore, in the embodiment of the present application, the Kovar sealing sleeve 113 is connected to the terminal post 112 by welding and is connected to the transparent glass shell 110 by sintering, and the Kovar sealing disk 114 is connected to the terminal post 112 by welding and is connected to the transparent glass shell 110 by sintering. Welding and sintering not only allow the terminal post 112 to be reliably connected to the transparent glass shell 110, but also form a good airtightness to prevent the leakage of the protective gas inside the chamber.

[0038] Reference Figure 3 , Figure 4 as well as Figure 5 As shown, an embodiment of the present application provides a DC contactor housing, including a protective shell body 100, the protective shell body 100 has an installation chamber 101 that can accommodate a moving contact system 102, and a first indicator 103 and a second indicator 104 are fixed to the moving contact system 102, and the first indicator 103 and the second indicator 104 are arranged along the movement path of the moving contact system 102; a side wall of the protective shell body 100 is provided with a visible window 105 located on the movement path; when the moving contact system 102 is opened, the first indicator 103 corresponds to the visible window 105, or, when the moving contact system 102 is closed, the second indicator 104 corresponds to the visible window 105.

[0039] It should be noted that the DC contactor housing provided in the embodiment of the present application is an insulating housing, wherein the specific shape of the protective housing body 100 can be selected by those skilled in the art according to needs.

[0040] The moving contact system 102 can reciprocate in a straight line direction in the installation chamber 101. When the moving contact system 102 approaches the terminal 112 in a straight line until the two are butted, the switch is closed. In this state, the second indicator 104 on the moving contact system 102 is flush with the visual window 105, that is, the second indicator 104 can be seen through the visual window 105. When the moving contact system 102 moves away from the terminal 112 in a straight line until the two are separated, the switch is opened. In this state, the first indicator 103 on the moving contact system 102 is flush with the visual window 105, that is, the first indicator 103 can be seen through the visual window 105.

[0041] It should be noted that the shape and size of the first indicator 103 and the second indicator 104 of the embodiment of the present application can be set by those skilled in the art as needed, so that the first indicator 103 and the second indicator 104 can be visually seen through the visual window 105. When the DC contactor using the embodiment of the present application has a fault such as welding or adhesion, the staff can obtain the current status of the product directly and quickly from the outside of the protective shell body 100 through the visual window 105 without disassembling the protective shell body 100, which is conducive to the rapid maintenance of the DC contactor.

[0042] The embodiment of the present application provides a DC contactor housing, including a protective shell body 100, the protective shell body 100 has an installation chamber 101 that can accommodate a moving contact system 102, and a first indicator 103 and a second indicator 104 are fixed on the moving contact system 102. The first indicator 103 and the second indicator 104 of the embodiment of the present application are arranged along the movement path of the moving contact system 102; the side wall of the protective shell body 100 is provided with a visual window 105 located on the movement path; in the embodiment of the present application, the opening of the moving contact system 102 drives the first indicator 103 to be flush with the visual window 105, so as to realize the intuitive visualization of the opening state, and the closing of the moving contact system 102 drives the second indicator 104 to be flush with the visual window 105, so as to realize the intuitive visualization of the closing state. Therefore, during maintenance, the staff can directly and quickly obtain the current status of the product, which makes it easy for the maintenance staff to operate and is conducive to the rapid maintenance of the DC contactor.

[0043] Reference Figure 4 As shown, as an optional embodiment, a mounting platform 106 is provided on one side of the moving contact system 102 close to the viewing window 105 ; the plane where the mounting platform 106 is located is parallel to the viewing window 105 ; the first indicator 103 and the second indicator 104 are arranged side by side on the mounting platform 106 .

[0044] Furthermore, in the embodiment of the present application, a mounting platform 106 is provided on one side of the moving contact system 102 close to the visual window 105, and the plane where the mounting platform 106 is located is parallel to the plane where the visual window 105 is located. Through the above arrangement, the first indicator 103 and the second indicator 104 can be arranged parallel to the visual window 105, so that the larger first indicator 103 and the second indicator 104 can be seen from the visual window 105, and it is convenient for the staff to obtain the status information of the contactor.

[0045] Reference Figure 4 As shown, exemplarily, the first indicator member 103 and the second indicator member 104 are both sheet members attached to the mounting platform 106; the plane area of ​​the sheet member is greater than or equal to the area of ​​the visible window 105; the first indicator member 103 or the second indicator member 104 can cover the visible window 105 when it is flush with the visible window 105.

[0046] Exemplarily, the first indicator 103 and the second indicator 104 are both rectangular pieces. On the plane of the visible window 105, the rectangular piece and the visible window 105 can overlap and correspond, that is, the orthographic projection area of ​​the rectangular piece on the plane where the visible window 105 is located is consistent with the size of the visible window 105, and the visible window 105 is also a rectangular window, and the length and width of the two rectangles are consistent.

[0047] It should be noted that the first indicator 103 and the second indicator 104 may be spaced apart from the plane where the visible window 105 is located.

[0048] As an optional implementation, the first indicator member 103 and the second indicator member 104 are fixed on the mounting platform 106 via a snap-fit ​​structure; or, the first indicator member 103 and the second indicator member 104 are fixed on the mounting platform 106 via an adhesive connection layer.

[0049] Furthermore, the embodiment of the present application discloses a clamping structure for fixing the first indicator 103 and the second indicator 104, or an adhesive connection layer for fixing the mounting platform 106. The clamping structure and the adhesive connection layer can be configured as required by those skilled in the art, and are not specifically limited herein.

[0050] As an optional implementation, a switch-off mark is provided on a surface of one side of the first indicator 103 close to the visual window 105 ; a switch-on mark is provided on a surface of one side of the second indicator 104 close to the visual window 105 .

[0051] It should be noted that the opening mark and closing mark in the embodiment of the present application can be color marks or graphic shape marks.

[0052] For example, the first indicator 103 is green, and the second indicator 104 is red, and the closing state is distinguished by different colors. Alternatively, the opening and closing states can be distinguished directly by using text marks on the first indicator 103.

[0053] Reference Figure 5 and Figure 6 As shown, as an optional implementation, the protective shell body 100 includes a first shell 107 and a second shell 108 ; the first shell 107 and the second shell 108 are connected via a shell clamping structure 109 .

[0054] Exemplarily, the shell snap-fit ​​structure 109 includes a plurality of snap-fit ​​protrusions spaced apart on the circumferential side wall of the first shell 107 and a plurality of snap-fit ​​grooves spaced apart on the second shell 108 ; the plurality of snap-fit ​​protrusions snap-fit ​​with the plurality of snap-fit ​​grooves in a one-to-one corresponding manner.

[0055] It should be noted that the protective shell body 100 of the embodiment of the present application includes a first shell 107 and a second shell 108 connected by a snap-fit ​​structure. The structural shapes of the first shell 107 and the second shell 108 can be set by those skilled in the art as needed.

[0056] It should be noted that the protective shell body 100 may also be a whole, or may be composed of more parts that are snap-fitted and assembled.

[0057] Reference Figure 6 As shown, as an optional embodiment, the visible window 105 is provided on the first shell 107, and a transparent glass shell 110 is provided inside the first shell 107; the moving contact system 102 is installed in the internal chamber of the transparent glass shell 110, and the transparent glass shell 110 is filled with protective gas.

[0058] Reference Figure 5 and Figure 6 As shown, in the embodiment of the present application, the visible window 105 is set on the first shell 107. By setting a transparent glass shell 110 between the moving contact system 102 and the first shell 107, the arc generated by the opening and closing of the moving contact system 102 and the terminal 112 is effectively prevented from passing through the visible window 105, thereby achieving arc isolation and effectively improving the safety of the visible window 105 of the DC contactor.

[0059] It should be noted that the transparent glass housing 110 is made of a transparent insulating material, such as glass.

[0060] Reference Figure 4As shown, further, the lower opening of the transparent glass shell 110 is covered with a yoke plate 111, and the yoke plate 111 is sealed and connected to the lower opening of the transparent glass shell 110 through a connector. For example, the transparent glass shell 110 made of glass is welded to the yoke plate 111 through Kovar alloy.

[0061] In the embodiment of the present application, the yoke plate 111 is installed on the transparent glass shell 110 to seal the lower end of the chamber of the transparent glass shell 110 .

[0062] Reference Figure 5 and Figure 6 As shown, an embodiment of the present application also provides a DC contactor, including the above-mentioned DC contactor housing, drive system, moving contact system 102 and terminal 112; the drive system and the moving contact system 102 are both arranged in the DC contactor housing; the terminal 112 is inserted into the DC contactor housing, and the drive system drives the moving contact system 102 to move linearly, and opens or closes the switch with the terminal 112.

[0063] The driving system of the embodiment of the present application can drive the moving contact system 102 to move in a straight line direction, so that the moving contact system 102 and the terminal 112 can be closed or opened. The embodiment of the present application sets a visual window 105 on the linear motion path of the moving contact system 102, so that the first indicator 103 and the second indicator 104 can be aligned with the visual window 105 respectively to realize the indication of the opening and closing states. Therefore, the embodiment of the present application can directly observe the opening and closing states of the moving contact system 102 and the terminal 112 system, which is convenient for the staff to disassemble and maintain.

[0064] 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 DC contactor housing, characterized in that: The invention comprises a transparent glass shell (110), wherein the transparent glass shell (110) has an internal chamber capable of accommodating a moving contact system (102), wherein the transparent glass shell (110) has a mounting hole (116), and wherein the transparent glass shell (110) is provided with a terminal (112) penetrating the mounting hole (116); a kovar sealing sleeve (113) for sealing is provided between the mounting hole (116) and the terminal (112); the kovar sealing sleeve (113) is sleeved on the outer wall of the terminal (112), and the inner side surface of the kovar sealing sleeve (113) is in contact with the outer side wall of the terminal (112); and the outer side surface of the kovar sealing sleeve (113) is in contact with the inner wall of the mounting hole (116).

2. The DC contactor housing according to claim 1, characterized in that: The terminal post (112) is provided with a boss (115), and the kovable sealing sleeve (113) is provided with a kovable sealing disk (114) which is in contact with the boss (115), and the surface of the kovable sealing disk (114) which is away from the boss (115) is in contact with the surface of the transparent glass shell (110).

3. The DC contactor housing according to claim 2, characterized in that: The kovar sealing sleeve (113) and the kovar sealing disc (114) are integrally formed and made of the same material.

4. The DC contactor housing according to claim 2, characterized in that: The central axis of the Kovar sealing sleeve (113) is perpendicular to the plane where the Kovar sealing disk (114) is located.

5. The DC contactor housing according to claim 2, characterized in that: The Kovar sealing sleeve (113) is connected to the terminal post (112) by welding and is connected to the transparent glass shell (110) by sintering; and / or the Kovar sealing disk (114) is connected to the terminal post (112) by welding and is connected to the transparent glass shell (110) by sintering.

6. The DC contactor housing according to claim 1, characterized in that: The invention also comprises a protective shell body (100) sleeved on the outside of the transparent glass shell (110); a first indicator (103) and a second indicator (104) are fixed on the moving contact system (102); the first indicator (103) and the second indicator (104) are arranged along the moving path of the moving contact system (102); a visual window (105) located on the moving path is opened on the side wall of the protective shell body (100); when the moving contact system (102) is opened, the first indicator (103) corresponds to the visual window (105); or, when the moving contact system (102) is closed, the second indicator (104) corresponds to the visual window (105) in a flush manner.

7. The DC contactor housing according to claim 6, characterized in that: A mounting platform (106) is provided on one side of the moving contact system (102) close to the visible window (105); the plane on which the mounting platform (106) is located is parallel to the visible window (105); and the first indicator (103) and the second indicator (104) are arranged side by side on the mounting platform (106).

8. The DC contactor housing according to claim 7, characterized in that: The first indicator (103) and the second indicator (104) are both sheet-like members attached to the mounting platform (106); the plane area of ​​the sheet-like member is greater than or equal to the area of ​​the visible window (105); and the first indicator (103) or the second indicator (104) can cover the visible window (105) when it is flush with the visible window (105).

9. The DC contactor housing according to claim 7, characterized in that: The first indicator (103) and the second indicator (104) are fixed on the mounting platform (106) via a snap-fit ​​structure; or the first indicator (103) and the second indicator (104) are fixed on the mounting platform (106) via an adhesive connection layer.

10. A DC contactor, characterized in that: It comprises a DC contactor housing, a drive system and a moving contact system (102) as claimed in any one of claims 1 to 9; the drive system drives the moving contact system (102) to move linearly and opens or closes the contact with the terminal (112) in the DC contactor housing.

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