Contact module and electric appliance switch
By using a rotating bracket and partition design, combined with permanent magnets and a limiting structure, the problem of insufficient creepage distance between the moving and stationary contacts is solved, thus achieving a miniaturized electrical switch design with high safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KEDU ELECTRIC CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-21
AI Technical Summary
In existing technologies, the creepage distance between the moving and stationary contacts is insufficient when the circuit is open, resulting in inadequate equipment safety and contradicting the requirements for product miniaturization.
The rotating bracket design is adopted, with the moving contact and the stationary contact respectively at both ends. The rotating bracket is equipped with a partition to increase the creepage distance when the circuit is open. The integrated injection-molded bracket and partition structure, combined with permanent magnets and limiting structures, ensures the stability of the moving contact and the creepage distance.
Without increasing the size of the switch, the creepage distance is increased, enhancing the safety and stability of the equipment, avoiding arc burn-out and contact welding, and meeting the miniaturization requirements.
Smart Images
Figure CN224153273U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field, specifically to a contact module and an electrical switch. Background Technology
[0002] As key switching components in electrical switches, the insulation reliability of moving and stationary contacts during the breaking process directly affects equipment safety. In existing technology, disconnecting switches include two stationary contacts and a moving contact rotatably mounted between the two stationary contacts. The two ends of the moving contact are respectively in contact with the corresponding stationary contacts. In actual use, the inventors found that in the open state, in order to increase the creepage distance between the moving contact and the non-corresponding stationary contacts, the size of the switch has to be increased, which contradicts the requirement for product miniaturization. Utility Model Content
[0003] Therefore, the technical problem to be solved by this utility model is to overcome the defects in the prior art, thereby providing a contact module and electrical switch with high safety and miniaturization.
[0004] To address this, the present invention provides a contact module comprising two stationary contacts fixed within the switch body; and a moving contact assembly comprising a rotating bracket and a moving contact disposed on the rotating bracket, wherein the two ends of the moving contact are respectively disposed corresponding to the two stationary contacts. The rotating bracket comprises a bracket body and a partition disposed on the outer wall of the bracket body and adjacent to the end of the moving contact. In the open state, the partition is located between the end of the moving contact and the stationary contact that is not in contact with the end of the moving contact, thereby increasing the creepage distance between the two.
[0005] The partition and the support body are integrally formed by injection molding.
[0006] The support body has a through hole, the moving contact is inserted into the through hole, and its two ends extend from the two ends of the through hole to contact and communicate with or separate from the corresponding stationary contact. There are two partitions, which are located at the two ends of the through hole and are staggered.
[0007] The bracket body is formed with two through holes and a connecting plate located between the two through holes. The moving contact includes two moving contact plates, which are installed in the corresponding through holes.
[0008] The moving contact assembly further includes a magnetizing sheet and a spring sheet. The magnetizing sheet is in contact with the moving contact plate. The spring sheet is installed on the side of the magnetizing sheet away from the moving contact plate.
[0009] The magnetizing sheet has two limiting feet on its side that are bent and connected to its main body, and the connecting plate has first limiting grooves on both sides that are adapted to the limiting feet.
[0010] The moving contact plate is formed with a groove for the limiting foot to be engaged.
[0011] The spring piece has a second limiting groove formed in the middle, and the inner wall of the through hole has a limiting protrusion that matches the second limiting groove.
[0012] The moving contact assembly also includes two permanent magnets, which are installed in two mounting slots of the bracket body and are symmetrically distributed.
[0013] This utility model also provides an electrical switch, including a switch body and a contact module as described above.
[0014] The technical solution of this utility model has the following advantages:
[0015] 1. The contact module provided by this utility model includes: two stationary contacts fixed in the switch body; a moving contact assembly including a rotating bracket and a moving contact disposed on the rotating bracket, wherein the two ends of the moving contact are respectively disposed corresponding to the two stationary contacts, the rotating bracket including a bracket body and a partition disposed on the outer wall of the bracket body and adjacent to the end of the moving contact, wherein, in the open state, the partition is located between the end of the moving contact and the stationary contact that does not contact or communicate with the end of the moving contact, thereby increasing the creepage distance between the two and ensuring the safe use of the switch without increasing the size of the switch.
[0016] 2. The contact module provided by this utility model has two limiting feet on the side of the magnetizing sheet, which are bent and connected to the main body. The connecting plate has first limiting grooves on both sides that are adapted to the limiting feet. The moving contact plate has a slot for the limiting feet to be inserted, so that the magnetizing sheet cannot move along the through hole direction.
[0017] 3. The contact module provided by this utility model includes two permanent magnets in the moving contact assembly. The two permanent magnets are installed in two mounting slots of the bracket body and are symmetrically distributed. The permanent magnets can increase the arc-extinguishing capability and prevent the electric arc from burning out the switch and welding the contacts. Attached Figure Description
[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0019] Figure 1 This is a perspective view of the electrical switch (in the open state) of this utility model;
[0020] Figure 2 This is an exploded view of an electrical switch.
[0021] Figure 3 A 3D view of the rotating support;
[0022] Figure 4 This is a side view of the rotating bracket;
[0023] Figure 5 This is a cross-sectional view of the rotating support;
[0024] Figure 6 This is a cross-sectional view of the moving contact assembly;
[0025] Figure 7 This is an assembly diagram of the spring, magnetizing plate, and moving contact plate;
[0026] Figure 8 This is an assembly diagram of the spring, magnetizing plate, and moving contact plate;
[0027] Figure 9 This is a schematic diagram of the assembly of the rotating support and the permanent magnet.
[0028] Explanation of reference numerals in the attached drawings: 1. Stationary contact; 1a. First stationary contact; 1b. Second stationary contact; 2. Switch body; 3. Rotating bracket; 4. Moving contact; 4a. First moving contact; 4b. Second moving contact; 41. Moving contact plate; 42. Slot; 5. Bracket body; 6. Partition plate; 7. Through hole; 8. Connecting plate; 9. Magnetizing sheet; 10. Spring sheet; 11. First limiting slot; 12. Second limiting slot; 13. Limiting foot; 14. Limiting protrusion; 15. Permanent magnet; 16. Mounting slot. Detailed Implementation
[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0032] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0033] Example
[0034] This embodiment provides an electrical switch, such as... Figure 1 As shown, the switch includes a switch body 2 and a contact module installed inside the switch body 2. The contact module includes a stationary contact 1 and a moving contact assembly.
[0035] There are two stationary contacts 1, which are diagonally distributed within the switch body 2. In this embodiment, the two stationary contacts 1 are the first stationary contact 1a and the second stationary contact 1b.
[0036] The moving contact assembly is located between the two stationary contacts 1, such as... Figure 2 As shown, the moving contact assembly includes a rotating bracket 3, and a moving contact 4, a magnetizing sheet 9, a spring sheet 10, and a permanent magnet 15 disposed on the rotating bracket 3.
[0037] Rotating bracket 3, such as Figure 1 and Figure 3 As shown, the device includes a support body 5 and a partition 6 disposed on the outer wall of the support body 5 and adjacent to the moving contact 4. In the open state, the partition 6 is located between the moving contact 4 and the stationary contact 1 to increase the creepage distance between them. In this embodiment, the support body 5 is cylindrical, and the partition 6 is integrally formed with the support body 5 by injection molding. The support body 5 has a through hole 7, through which the moving contact 4 passes, with both ends extending from the two ends of the through hole 7 to contact or separate from the corresponding stationary contact 1. In this embodiment, there are two partitions 6, located at both ends of the through hole 7 and staggered. Figure 4 and Figure 5As shown, the bracket body 5 has two through holes 7 and a connecting plate 8 located between the two through holes 7. The moving contact 4 includes two moving contact plates 41, which are installed in the corresponding through holes 7. It should be noted that the two ends of the moving contact 4 are a first moving contact 4a and a second moving contact 4b, respectively. The first moving contact 4a is in contact with the first stationary contact 1a and can be connected or disconnected. The second moving contact 4b is in contact with the second stationary contact 1b and can be connected or disconnected. When the switch is in the open state, in order to increase the creepage distance between the first moving contact 4a and the second stationary contact 1b, and between the second moving contact 4b and the first stationary contact 1a, a partition 6 is added between the first moving contact 4a and the second stationary contact 1b, and another partition 6 is added between the second moving contact 4b and the first stationary contact 1a.
[0038] The magnetizing sheet 9 is in close contact with the moving contact plate 41, such as... Figure 4 , Figure 7 and Figure 8 As shown, the magnetizing sheet 9 has two limiting feet 13 bent and connected to its main body on its side. The connecting plate 8 has first limiting grooves 11 on both sides that are adapted to the limiting feet 13. The moving contact plate 41 has a slot 42 for the limiting feet 13 to be inserted into.
[0039] The spring piece 10 is installed on the side of the magnetizing plate 9 away from the moving contact plate 41, such as... Figure 6 As shown, a second limiting groove 12 is formed in the middle of the spring piece 10, and a limiting protrusion 14 adapted to the second limiting groove 12 is formed on the inner wall of the through hole 7.
[0040] like Figure 9 As shown, two permanent magnets 15 are installed in two mounting slots 16 of the bracket body 5 and are symmetrically distributed.
[0041] It should be noted that the electrical switch can be a disconnector or a circuit breaker.
[0042] The contact module provided by this utility model includes: two stationary contacts 1, fixed inside the switch body 2; the moving contact assembly includes a rotating bracket 6 and a moving contact 7 disposed on the rotating bracket 6, with the two ends of the moving contact 7 respectively corresponding to the two stationary contacts 1; the rotating bracket 3 includes a bracket body 5 and a partition 6 disposed on the outer wall of the bracket body 5 and adjacent to the end of the moving contact 4, wherein, in the open state, the partition 6 is located between the end of the moving contact 4 and the stationary contact 1 that does not contact or communicate with the end of the moving contact 4, in order to increase the creepage distance between the two, thereby ensuring the safe use of the switch without increasing the size of the switch.
[0043] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A contact module, characterized by include: Two stationary contacts (1) are fixed inside the switch body (2); The moving contact assembly includes a rotating bracket (3) and a moving contact (4) disposed on the rotating bracket (3). The two ends of the moving contact (4) are respectively disposed corresponding to two stationary contacts (1). The rotating bracket (3) includes a bracket body (5) and a partition (6) disposed on the outer wall of the bracket body (5) and adjacent to the end of the moving contact (4). In the open state, the partition (6) is located between the end of the moving contact (4) and the stationary contact (1) that is not in contact with the end of the moving contact (4) to increase the creepage distance between the two.
2. The contact module of claim 1, wherein, The partition (6) and the support body (5) are integrally formed by injection molding.
3. The contact module according to claim 1 or 2, characterized in that The support body (5) is formed with a through hole (7). The moving contact (4) passes through the through hole (7) and its two ends extend from the two ends of the through hole (7) to contact and communicate or separate from the corresponding stationary contact (1). There are two partitions (6). The two partitions (6) are located at the two ends of the through hole (7) and are staggered.
4. The contact module of claim 3, wherein, The bracket body (5) is formed with two through holes (7) and a connecting plate (8) located between the two through holes (7). The moving contact (4) includes two moving contact plates (41), and the two moving contact plates (41) are installed in the corresponding through holes (7).
5. The contact module of claim 4, wherein, The moving contact assembly also includes: The magnetizing sheet (9) is in contact with the moving contact plate (41); A spring (10) is installed on the side of the magnetizing plate (9) away from the moving contact plate (41).
6. The contact module of claim 5, wherein, The magnetizing sheet (9) has two limiting feet (13) on its side that are bent and connected to its main body. The connecting plate (8) has first limiting grooves (11) on both sides that are adapted to the limiting feet (13).
7. The contact module of claim 6, wherein, The moving contact plate (41) is formed with a slot (42) for the limiting foot (13) to be inserted.
8. The contact module of any of claims 5-7, wherein, The spring piece (10) has a second limiting groove (12) formed in the middle, and the inner wall of the through hole (7) has a limiting protrusion (14) that matches the second limiting groove (12).
9. The contact module of claim 1, wherein, The moving contact assembly also includes two permanent magnets (15), which are installed in two mounting slots (16) of the bracket body (5) and are symmetrically distributed.
10. An electrical switch, characterised in that, It includes a switch body (2) and a contact module as claimed in any one of claims 1-9.