Contact system and isolating switch

Abstract

The utility model provides a contact system and an isolating switch, and relates to the technical field of low-voltage electrical appliances, the contact system comprises a plurality of layers of stacked contact units, each layer of contact unit comprises a moving contact group and a pair of static contacts matched with the moving contact group, and each static contact comprises a contact part in contact with the moving contact group and a wiring part for external connection; in the stacking direction, the projections of the wiring parts of the static contacts of the adjacent layers of contact units coincide, and the projection of the contact part of the static contact of at least one layer of contact unit does not completely coincide with the projections of the contact parts of the static contacts of the other layers of contact units. Through the arrangement, the contact areas of the contact part and the moving contact group are different, the current bearing requirements of positive and negative electrode layers can be met at the same time, better electrical performance can be ensured when the contact area of the contact part and the moving contact group is larger, and the larger contact area also has the advantages of reducing the temperature rise of the contact, ensuring more times of electrical life and the like; therefore, the overall cost performance of the isolating switch is improved.

Description

Technical Field

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

[0002] The contact system of the disconnector generally includes a moving contact group and a pair of static contacts. The contact shape and size of the moving and static contact parts in the projection of the stacking direction of each switch unit are consistent, that is, in the stacking direction, the projections of the static contacts of the upper and lower layers completely overlap or the projections of the contact parts of the static contacts completely overlap.

[0003] When disconnectors are used in the photovoltaic field, the most common wiring method is to connect two positive and one negative terminals to the disconnector. The current carried by the disconnector's negative contact system is the sum of the currents carried by the two positive contact systems. Higher currents place greater demands on the disconnector. If existing disconnectors meet the current-carrying requirements of the positive layer, they cannot guarantee the current-carrying safety of the negative layer. If they meet the current-carrying requirements of the negative layer, the positive layer's switch performance will be exceeded, resulting in increased costs. Furthermore, they cannot meet the current-carrying requirements of both the positive and negative layers simultaneously. Utility Model Content

[0004] The purpose of this application is to address the deficiencies in the above-mentioned prior art and provide a contact system and an isolating switch that can take into account the current carrying requirements of the positive and negative electrode layers and ensure that the isolating switch has better electrical performance.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:

[0006] According to one aspect of an embodiment of the present application, a contact system is provided, comprising a plurality of stacked contact units, wherein each layer of the contact units comprises a moving contact group, and a pair of stationary contacts respectively cooperating with the moving contact group, and each of the stationary contacts comprises a contact portion for contacting the moving contact group, and a wiring portion for external connection; in the stacking direction, the projections of the wiring portions of the stationary contacts of the contact units of adjacent layers overlap, and the projections of the contact portions of the stationary contacts of at least one layer of the contact units do not completely overlap with the projections of the contact portions of the stationary contacts of the contact units of other layers.

[0007] Optionally, in the stacking direction, projections of contact portions of the static contacts of at least one layer of the contact units are at least partially symmetrical with projections of contact portions of the static contacts of the contact units of other layers along the main axis of the moving contact group.

[0008] Optionally, in the stacking direction, projections of contact portions of the static contacts of the contact units in any adjacent layers are at least partially symmetrical along the main axis of the moving contact group.

[0009] Optionally, in the stacking direction, projections of the contact portions of the static contacts of the contact units in any adjacent layers are completely symmetrical along the main axis of the moving contact group.

[0010] Optionally, a contact area between the contact portions of the static contacts of at least one layer of the contact units and the movable contact group is larger than a contact area between the contact portions of the static contacts of the contact units of other layers and the movable contact group.

[0011] Optionally, the contact portions of the static contacts of the multiple layers of contact units are collinear with central axes of projections in the stacking direction, and the contact portions of the static contacts of at least one layer of contact units are closer to the moving contact group than the contact portions of the static contacts of the contact units of other layers.

[0012] Optionally, in any two adjacent layers, the contact portions of the static contacts of the contact units in one layer are closer to the movable contact group than the contact portions of the static contacts of the contact units in the other layer.

[0013] Optionally, along the stacking direction, projections of the moving contact groups of at least one layer are staggered or partially overlap with projections of the moving contact groups of other layers.

[0014] Optionally, the moving contact group is rotatably arranged to contact or disconnect with the static contact.

[0015] Another aspect of the embodiments of the present application provides an isolating switch including the above-mentioned contact system.

[0016] The beneficial effects of this application include:

[0017] The present application provides a contact system and an isolating switch. In the multi-layer stacked contact units, each layer of contact units includes a moving contact group and a pair of static contacts respectively matched with the moving contact group. Each static contact includes a contact portion that contacts the moving contact group and a wiring portion for external connection. In the stacking direction, the projections of the wiring portions of the static contacts of the contact units of adjacent layers overlap, and the projections of the contact portions of the static contacts of at least one layer of contact units do not completely overlap with the projections of the contact portions of the static contacts of the contact units of other layers. Such a setting can make the contact area between the contact portion and the moving contact group different, and can simultaneously meet the current carrying requirements of the positive and negative layers. When the contact area between the contact portion and the moving contact group is larger, better electrical performance can be guaranteed. In addition, a larger contact area has the advantages of reducing the temperature rise of the contacts and ensuring a longer electrical life, thereby improving the overall cost performance of the isolating switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. 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 relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is one of the structural schematic diagrams of a contact system embodiment 1 provided in an embodiment of the present application;

[0020] Figure 2a This is a second structural diagram of the first embodiment of a contact system provided in an embodiment of the present application;

[0021] Figure 2b S3 is a structural diagram of embodiment 1 of a contact system provided in an embodiment of the present application;

[0022] Figure 3 This is a fourth structural diagram of a first embodiment of a contact system provided in an embodiment of the present application;

[0023] Figure 4 This is one of the structural diagrams of Example 2 of a contact system provided in an embodiment of the present application;

[0024] Figure 5a This is a second structural diagram of a contact system according to an embodiment of the present application;

[0025] Figure 5b This is a third structural diagram of the second embodiment of a contact system provided in an embodiment of the present application;

[0026] Figure 6 This is the fourth structural diagram of Example 2 of a contact system provided in an embodiment of the present application.

[0027] Icon: 10A-contact system; 10-housing; 11-moving contact group; 12-static contact; 120-contact part; 121-connection part; D-stacking direction; S-center axis; Z-spindle. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] 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 as claimed, but merely represents selected embodiments of the present application. It should be noted that, unless there is a conflict, the various features of the embodiments of the present application may be combined with each other, and the combined embodiments are still within the scope of protection of the present application.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0033] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0034] In one aspect of the embodiment of the present application, referring to Figure 1, provides a contact system 10A, including multiple layers of stacked contact units, each layer of contact units including a moving contact group 11, and a pair of static contacts 12 respectively cooperating with the moving contact group 11, each static contact 12 including a contact portion 120 in contact with the moving contact group 11, and a wiring portion 121 for external connection; in the stacking direction D, the projections of the wiring portions 121 of the static contacts 12 of the contact units in adjacent layers overlap, and the projections of the contact portions 120 of the static contacts 12 of at least one layer of contact units do not completely overlap with the projections of the contact portions 120 of the static contacts 12 of the contact units in other layers.

[0035] The disconnector has multiple switch layers, which are stacked along a stacking direction D. Each switch layer includes a housing 10 , and each housing 10 is provided with a contact unit, so the multiple contact units are stacked.

[0036] For example, the contact unit includes a moving contact group 11 located in the center of the housing 10, and a pair of static contacts 12 are symmetrically arranged on both sides of the moving contact group 11; the moving contact group 11 is rotatably arranged in the housing 10, and the rotation of the moving contact group 11 makes contact with or disconnects the pair of static contacts 12 to realize the conduction or disconnection of the switch.

[0037] The static contact 12 includes a contact portion 120 and a wiring portion 121 that are connected to each other. The contact portion 120 is used to contact the moving contact group 11 to achieve conduction, and the wiring portion 121 is connected to an external circuit through screws.

[0038] In the stacking direction D, the projections of the connection portions 121 of each static contact 12 completely overlap, that is, each connection portion 121 is located in the same position in the stacking direction D; however, the projections of the contact portions 120 of the static contacts 12 of at least one layer of contact units do not completely overlap with the projections of the contact portions 120 of the static contacts 12 of the contact units of other layers. Since the contact portion 120 of the static contact 12 is the part that makes contact and conducts with the moving contact group 11, the projections of the contact portions 120 of at least one layer do not completely overlap with the projections of the contact portions 120 of other layers. This arrangement can create a difference in the contact area between the contact portion 120 and the moving contact group 11, which can simultaneously meet the current carrying requirements of the positive and negative layers. A larger contact area between the contact portion 120 and the moving contact group 11 can ensure better electrical performance. A larger contact area also has the advantages of reducing contact temperature rise and ensuring a longer electrical life, thereby improving the overall cost-effectiveness of the disconnector.

[0039] The projection of at least one layer contact portion 120 does not completely overlap with the projection of other layer contact portions 120 , and the incomplete overlap includes complete non-overlap and partial overlap.

[0040] In one embodiment of the present application, the projection of the contact portion 120 of the static contact 12 of at least one layer of contact units is at least partially symmetrical with the projection of the contact portion 120 of the static contact 12 of other layers of contact units along the main axis Z of the moving contact group 11; it should be pointed out that the projections in the present application all refer to the projection in the stacking direction D.

[0041] In the multi-layer contact unit, it is sufficient as long as the projection of the contact portion 120 of the static contact 12 of one layer of contact unit is at least partially symmetrical with the projection of the contact portion 120 of the static contact 12 of the contact unit of other layers along the main axis Z of the moving contact group 11; generally, the same setting method of two layers in a group can be adopted to form a multi-layer stacked contact unit, that is, the projection of the contact portion 120 of the static contact 12 of any adjacent layers of contact units is at least partially symmetrical along the main axis Z of the moving contact group 11. For example, the projection of the contact portion 120 of the static contact 12 of the adjacent layers can be partially symmetrical along the main axis Z, and the projection of the contact portion 120 of the static contact 12 of the contact unit of the spacer layer coincides.

[0042] Further, if Figure 2a 、 Figure 2b As shown, in the stacking direction D, the projections of the contact portions 120 of the static contacts 12 of any adjacent layer of contact units are completely symmetrical along the main axis Z of the moving contact group 11 .

[0043] Figures 1 to 3 In the example, two layers of contact units are provided, and the projections of the contact portions 120 of the static contacts 12 of the two layers of contact units in the stacking direction D are completely symmetrical and staggered along the main axis Z, and the projections of the two layers of contact portions 120 in the stacking direction D do not overlap at all.

[0044] In other embodiments, when the at least partially symmetrical, it may also be partially symmetrical and partially asymmetrical, that is, the projections of the two contact portions 120 in the stacking direction D are partially symmetrical, and the specific selection is based on actual needs.

[0045] In another embodiment, the contact portions 120 of the static contacts 12 of each layer can be arranged on the same straight line, that is, in the stacking direction D, the central axes S of the projections of the contact portions 120 of the static contacts 12 of the multi-layer contact unit are collinear, and the projections of the multi-layer contact portions 120 overlap, such as Figures 4 to 6 shown.

[0046] When the contact portions 120 of the static contacts 12 of each layer are arranged on the same straight line, the contact area between the contact portion 120 of the static contacts 12 of at least one layer of contact units and the movable contact group 11 is larger than the contact area between the contact portion 120 of the static contacts 12 of the contact units of other layers and the movable contact group 11; in other words, Figure 5a 、 Figure 5bAs shown, the contact portion 120 of the static contact 12 of at least one layer of contact units is closer to the moving contact group 11 than the contact portion 120 of the static contact 12 of other layers of contact units; the contact portion 120 closer to the moving contact group 11 has a larger contact area with the moving contact group 11. When the contact area is large, it can carry a larger current, so that the contact area of the static and dynamic contacts 12 of the large current layer is larger to ensure better electrical performance.

[0047] This application Figures 4 to 6 In the example, there are two layers of contact units, and the contact portion 120 of the static contact 12 of one layer of contact units is closer to the moving contact group 11 than the contact portion 120 of the static contact 12 of the other layer of contact units, so that in the direction of contact between the static contact 12 and the moving contact group 11, the lengths of the contact portions 120 of the two layers are different, forming a length difference, so that the projections of the contact portions 120 of the adjacent layers of static contacts 12 in the stacking direction D form a partial overlap.

[0048] At this time, when there are multiple layers of contact units, the same setting method of two layers in a group can also be adopted, that is, in any two adjacent layers, the contact portion 120 of the static contact 12 of one layer of contact unit is closer to the moving contact group 11 than the contact portion 120 of the static contact 12 of the other layer of contact unit; the projections of the contact portions 120 of the static contacts 12 of any two layers of contact units overlap and have the same distance from the moving contact group 11.

[0049] For the movable contact groups 11, along the stacking direction D, the projections of at least one layer of movable contact groups 11 are offset or partially overlapped with the projections of the movable contact groups 11 of other layers. Furthermore, the projections of the movable contact groups 11 of adjacent layers in the stacking direction D can completely overlap, completely offset, or partially overlap, depending on the arrangement of the stationary contacts 12 of adjacent layers, so that the movable contact group 11 matches a pair of stationary contacts 12 on the same layer, which will not be further described.

[0050] On the other hand, an embodiment of the present application further discloses an isolating switch, comprising a contact system 10A as described above.

[0051] The isolating switch includes the same structure and benefits as the contact system 10A in the aforementioned embodiment. The structure and benefits of the contact system 10A have been described in detail in the aforementioned embodiment and will not be repeated here.

[0052] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A contact system, characterized in that: The invention comprises a plurality of stacked contact units, wherein each layer of the contact units comprises a movable contact group (11) and a pair of stationary contacts (12) respectively matched with the movable contact group (11), and each stationary contact (12) comprises a contact portion (120) in contact with the movable contact group (11) and a wiring portion (121) for external connection; in the stacking direction (D), the projections of the wiring portions (121) of the stationary contacts (12) of the contact units of adjacent layers overlap, and the projections of the contact portions (120) of the stationary contacts (12) of at least one layer of the contact units do not completely overlap with the projections of the contact portions (120) of the stationary contacts (12) of the contact units of other layers.

2. The contact system according to claim 1, characterized in that In the stacking direction (D), the projection of the contact portion (120) of the static contact (12) of at least one layer of the contact unit and the projection of the contact portion (120) of the static contact (12) of the contact unit of another layer are at least partially symmetrical along the main axis (Z) of the moving contact group (11).

3. The contact system according to claim 2, characterized in that In the stacking direction (D), the projections of the contact portions (120) of the static contacts (12) of the contact units of any adjacent layers are at least partially symmetrical along the main axis (Z) of the moving contact group (11).

4. The contact system according to claim 3, characterized in that In the stacking direction (D), the projections of the contact portions (120) of the static contacts (12) of the contact units in any adjacent layers are completely symmetrical along the main axis (Z) of the moving contact group (11).

5. The contact system according to claim 1, wherein: The contact area between the contact portion (120) of the static contact (12) of at least one layer of the contact unit and the movable contact group (11) is greater than the contact area between the contact portion (120) of the static contact (12) of the contact unit of other layers and the movable contact group (11).

6. The contact system according to claim 5, characterized in that The central axes (S) of the projections of the contact portions (120) of the static contacts (12) of the multiple layers of the contact units in the stacking direction (D) are collinear, and the contact portions (120) of the static contacts (12) of at least one layer of the contact units are closer to the moving contact group (11) than the contact portions (120) of the static contacts (12) of the contact units of other layers.

7. The contact system according to claim 6, characterized in that In any two adjacent layers, the contact portion (120) of the static contact (12) of the contact unit in one layer is closer to the moving contact group (11) than the contact portion (120) of the static contact (12) of the contact unit in the other layer.

8. The contact system according to any one of claims 1 to 7, characterized in that Along the stacking direction (D), the projection of the moving contact group (11) of at least one layer is staggered or partially overlapped with the projection of the moving contact group (11) of another layer.

9. The contact system according to any one of claims 1 to 7, characterized in that The movable contact group (11) is rotatably arranged to contact or disconnect with the stationary contact (12).

10. An isolating switch, characterized in that: Comprising the contact system (10A) according to any one of claims 1 to 9.

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