An over / under voltage protector
By optimizing the structural layout of the over/under voltage protector and adopting a spliced housing and internal mounting base structure, the connection problem of the magnetic latching relay terminals was solved, resulting in lower assembly difficulty and cost, while improving safety.
Patent Information
- Application Number
- CN202522093974.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-29
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-29
AI Technical Summary
The wiring terminals of the magnetic latching relay in the existing over/under voltage protector require additional wires to connect to the terminals, which increases the assembly difficulty and cost.
The first and second outer shells are spliced together to form a wiring groove, and the interior is equipped with a mounting base and relay assembly, including a stationary contact, a moving contact, a conductive plate and a guide groove, which eliminates the need for additional wire connections and optimizes the internal structural layout.
It reduces assembly difficulty, saves material waste, lowers costs, and improves safety by increasing creepage distance through partitions.
Smart Images
Figure CN224683040U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of power protection devices, and in particular to an over / under voltage protector. Background Technology
[0002] Over / under voltage protectors are devices used to protect electrical equipment and circuits. Their main function is to automatically cut off the power supply when the voltage is too high or too low, preventing damage to equipment, fires, or safety accidents caused by abnormal voltage. The magnetic latching relay in the over / under voltage protector is mainly used to achieve automatic circuit switching and state holding functions. When the input voltage exceeds or falls below a set threshold, the magnetic latching relay can automatically cut off the circuit, preventing equipment damage due to voltage fluctuations.
[0003] In related technologies, the core component of the magnetic latching relay inside the over / under voltage protector is usually integrated into a separate housing, while the wiring terminals of the magnetic latching relay are led out from the outer wall of the housing. However, due to the limitations of the internal structure of the over / under voltage protector, the wiring terminals of the magnetic latching relay need to be connected to the terminals set on the over / under voltage protector by adding extra wires. The added wires also need to be soldered and fixed, which increases the assembly difficulty to a certain extent and also increases the additional cost. Utility Model Content
[0004] This application provides an over / under voltage protector that optimizes the internal structural layout, making the internal structure more reasonable, saving unnecessary material waste, and reducing costs.
[0005] The over / under voltage protector provided in this application adopts the following technical solution: An over / under voltage protector includes a first housing and a second housing that are spliced and fixed together, forming a wiring groove for placing terminals; a mounting base is integrally formed on the inner side wall of the first housing, and a relay assembly is disposed in the mounting base; a cover plate for covering the relay assembly is detachably installed on the mounting base; the relay assembly includes a stationary contact and a moving contact that are limited on the mounting base; a conductive plate connected to the moving contact is provided at the upper limit of the mounting base, and the ends of the conductive plate and the stationary contact away from the relay assembly are respectively inserted into their respective corresponding wiring grooves.
[0006] Preferably, the conductive sheet is provided with a plug post, and the movable contact sheet has a plug hole that is opposite to the plug post. The plug post is inserted into the plug hole, and the plug post and the plug hole are interference fit.
[0007] Preferably, the inner sidewall of the mounting base is provided with a guide groove facing the stationary contact piece, and the stationary contact piece is provided with a guide post facing the guide groove. The guide post is inserted along the assembly direction of the stationary contact piece and is limited in the guide groove.
[0008] Preferably, a limiting groove is also provided on the inner side wall of the mounting base, and the end of the stationary contact piece is inserted into and limited in the limiting groove.
[0009] Preferably, the relay assembly further includes an iron core disposed on a mounting base, a coil disposed on the iron core, and a permanent magnet rotatably disposed on the mounting base; a drive plate is also movably disposed on the mounting base, the permanent magnet is linked with the drive plate, and the moving contact is located on the sliding path of the drive plate.
[0010] Preferably, the mounting base is provided with a partition between the permanent magnet and the moving contact piece, the partition separating the permanent magnet and the moving contact piece from each other.
[0011] Preferably, the mounting base has insertion holes on the side wall facing the cover plate, and the cover plate has fixing posts that are one-to-one with the insertion holes. The fixing posts are respectively inserted and fixed in their respective insertion holes, and the fixing posts and insertion holes are interference fit.
[0012] In summary, this application includes at least one of the following beneficial technical effects: With the above structure, there is no need to add extra wires to connect to the terminals on the over / under voltage protector, which eliminates the complicated wire welding steps, reduces the assembly difficulty, optimizes the internal structural layout of the over / under voltage protector, makes the internal structure of the over / under voltage protector more reasonable, saves unnecessary material waste, and reduces costs. By separating the permanent magnet and the moving contact with a partition, the creepage distance between them can be increased, thereby further improving the overall safety. By aligning the guide post with the guide groove and inserting it into the mounting base, not only can the stationary contact piece be limited, but it can also prevent mistaken insertion. With the cooperation of the guide post and the guide groove, the stationary contact piece can be stably limited on the mounting base. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 yes Figure 1 A schematic diagram of a partial structural explosion; Figure 3 yes Figure 2 A schematic diagram of a localized explosion from another perspective; Figure 4 This is a schematic diagram showing a partial structure of the relay assembly inside the mounting bracket; Figure 5 This is a schematic diagram highlighting a portion of the relay assembly's structure; Figure 6 This is a schematic diagram highlighting the internal structure of the mounting base.
[0014] Explanation of reference numerals in the attached drawings: 1. First housing; 10. Mounting base; 100. Wiring groove; 101. Guide groove; 102. Top cover plate; 11. Cover plate; 110. Fixing post; 12. Limiting groove; 13. Socket; 2. Second housing; 3. Relay assembly; 30. Stationary contact piece; 300. Guide post; 31. Moving contact piece; 310. Socket hole; 32. Iron core; 33. Coil; 34. Permanent magnet; 35. Electrical contact; 4. Conductive sheet; 40. Socket post; 5. Drive board; 6. Partition plate. Detailed Implementation
[0015] The present application will be further described in detail below with reference to the accompanying drawings.
[0016] This application discloses an over / under voltage protector.
[0017] Reference Figure 1 , Figure 2 The over / under voltage protector includes a first housing 1 and a second housing 2 that are spliced and fixed together. The first housing 1 and the second housing 2 are insulating plastic shells. A top cover plate 102 is detachably provided on the top of the first housing 1 and the second housing 2 to fix the spliced first housing 1 and the second housing 2. The spliced first housing 1 and the second housing 2 form a wiring groove 100 for placing terminal blocks, and the wiring grooves 100 are symmetrically arranged on both sides of the first housing 1 and the second housing 2. A mounting base 10 is integrally formed on the inner wall of the first housing 1. A relay assembly 3 is disposed inside the mounting base 10, and a cover plate 11 is detachably installed on the outside of the mounting base 10 to cover the relay assembly 3.
[0018] like Figure 3 , Figure 4 As shown, the mounting base 10 has multiple insertion holes 13 on its side wall facing the cover plate 11. The cover plate 11 has integrally formed fixing posts 110 that correspond one-to-one with the insertion holes 13. The fixing posts 110 are respectively inserted and fixed in their respective corresponding insertion holes 13, and the fixing posts 110 and the insertion holes 13 are interference fit.
[0019] like Figure 4 , Figure 5 as well as Figure 6As shown, the relay assembly 3 includes an iron core 32 detachably mounted in the mounting base 10, with a coil 33 threaded through the iron core 32. It also includes a permanent magnet 34 rotatably mounted in the mounting base 10, positioned at an opening on one side of the iron core 32. When the coil 33 is energized, it generates a magnetic field that magnetizes the iron core 32. The magnetic field generated by the iron core 32 then interacts with the magnetism of the permanent magnet 34, using the principle of like poles repelling each other and unlike poles attracting each other, thus driving the permanent magnet 34 to rotate.
[0020] like Figure 4 , Figure 5 as well as Figure 6 As shown, the relay assembly 3 also includes a stationary contact 30 and a moving contact 31, which are limited on the mounting base 10. The moving contact 31 has elastic deformation capability. A conductive piece 4, one end of which is connected to the moving contact 31, is also limited on the mounting base 10. The ends of the conductive piece 4 and the stationary contact 30 away from the relay assembly 3 are respectively inserted into their respective corresponding wiring slots 100. Electrical contacts 35 for mutual contact and conduction are fixedly provided on the opposite sidewalls of the moving contact 31 and the stationary contact 30, and the electrical contacts 35 are arranged opposite each other. With the above structure, there is no need to add additional wires to connect to the terminals on the over / under voltage protector, eliminating complex wire soldering steps, reducing assembly difficulty, optimizing the internal structural layout of the over / under voltage protector, making the internal structure of the over / under voltage protector more reasonable, saving unnecessary material waste, and reducing costs.
[0021] like Figure 5 , Figure 6 As shown, the relay assembly 3 also includes a drive plate 5 slidably mounted on the mounting base 10. The drive plate 5 is located on one side of the permanent magnet 34, and the side of the permanent magnet 34 is linked to the drive plate 5. When the permanent magnet 34 rotates, it pushes the drive plate 5 to slide along a designated path. One end of the moving contact 31 is located on the sliding path of the drive plate 5. When the drive plate 5 moves away from the stationary contact 30 under the drive of the permanent magnet 34, the end of the moving contact 31 will move away from the stationary contact 30 under the push of the drive plate 5 and remain in an open state. Conversely, when the permanent magnet 34 rotates in the opposite direction, the drive plate 5 will move towards the stationary contact 30 under the drive of the permanent magnet 34 until the electrical contacts 35 of the moving contact 31 and the stationary contact 30 are closed, at which point the circuit will be in a closed state.
[0022] like Figure 5 , Figure 6 As shown, the mounting base 10 also has an integrally formed partition 6 located between the permanent magnet 34 and the moving contact 31. The partition 6 separates the permanent magnet 34 and the moving contact 31 from each other. The partition 6 is used to increase the creepage distance between the two, thereby further improving the overall safety.
[0023] like Figure 5 , Figure 6 As shown, a plurality of plug-in pins 40 are integrally formed on the side wall of the conductive sheet 4 facing the movable contact sheet 31. The movable contact sheet 31 has a plug-in hole 310 that is one-to-one with the plug-in pins 40. The plug-in pins 40 are respectively inserted and fixed in their respective corresponding plug-in holes 310, and the plug-in pins 40 and the plug-in holes 310 are interference fit.
[0024] like Figure 5 , Figure 6 As shown, the inner wall of the mounting base 10 is provided with a guide groove 101 facing the stationary contact piece 30. A guide post 300 facing the guide groove 101 is fixedly provided on the stationary contact piece 30. The guide post 300 is inserted and limited within the guide groove 101 along the assembly direction of the stationary contact piece 30. When assembling the stationary contact piece 30, by aligning the guide post 300 with the guide groove 101 and inserting it into the mounting base 10, not only is the stationary contact piece 30 limited, but it also serves to prevent mistaken insertion. With the cooperation of the guide post 300 and the guide groove 101, the stationary contact piece 30 can be stably limited on the mounting base 10.
[0025] like Figure 5 , Figure 6 As shown, the inner sidewall of the mounting base 10 is also provided with a limiting groove 12 facing the end of the stationary contact piece 30, and the end of the stationary contact piece 30 is inserted into and limited in the limiting groove 12.
[0026] The implementation principle is as follows: the ends of the conductive sheet 4 and the stationary contact sheet 30 furthest from the relay assembly 3 are respectively inserted into their respective corresponding wiring slots 100. Electrical contacts 35 for mutual contact and conduction are fixedly installed on the opposite sidewalls of the moving contact sheet 31 and the stationary contact sheet 30, and the electrical contacts 35 are arranged opposite each other. Using the above structure, there is no need to add additional wires to connect to the terminals on the over / under voltage protector, eliminating complex wire welding steps, reducing assembly difficulty, optimizing the internal structural layout of the over / under voltage protector, making the internal structure of the over / under voltage protector more reasonable, saving unnecessary material waste, and reducing costs. The permanent magnet 34 and the moving contact sheet 31 are separated by the partition 6, which increases the creepage distance between them, thereby further improving overall safety.
[0027] When assembling the stationary contact piece 30, the guide post 300 is aligned with the guide groove 101 and inserted into the mounting base 10. This not only limits the position of the stationary contact piece 30 but also prevents it from being mistakenly inserted. With the cooperation of the guide post 300 and the guide groove 101, the stationary contact piece 30 is stably positioned on the mounting base 10.
[0028] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. An over / under voltage protector, comprising a first housing (1) and a second housing (2) fixedly connected to each other, wherein the first housing (1) and the second housing (2) are connected to each other and form a wiring groove (100) for placing a terminal block; characterized in that: An integral mounting base (10) is formed on the inner side wall of the first housing (1). A relay assembly (3) is disposed inside the mounting base (10). A cover plate (11) for covering the relay assembly (3) is detachably installed on the mounting base (10). The relay assembly (3) includes a stationary contact (30) and a moving contact (31) that are limited on the mounting base (10). A conductive sheet (4) connected to the moving contact (31) is provided at the upper limit of the mounting base (10). The ends of the conductive sheet (4) and the stationary contact (30) away from the relay assembly (3) are respectively inserted into their respective corresponding wiring slots (100).
2. The over / under voltage protector according to claim 1, characterized in that: The conductive sheet (4) is provided with a plug post (40), and the movable contact sheet (31) is provided with a plug hole (310) opposite to the plug post (40). The plug post (40) is inserted into the plug hole (310), and the plug post (40) and the plug hole (310) are interference fit.
3. The over / under voltage protector according to claim 1, characterized in that: The inner wall of the mounting base (10) is provided with a guide groove (101) facing the stationary contact piece (30), and the stationary contact piece (30) is provided with a guide post (300) facing the guide groove (101). The guide post (300) is inserted along the assembly direction of the stationary contact piece (30) and limited in the guide groove (101).
4. The over / under voltage protector according to claim 3, characterized in that: The inner wall of the mounting base (10) is also provided with a limiting groove (12), and the end of the stationary contact piece (30) is inserted and limited in the limiting groove (12).
5. The over / under voltage protector according to claim 1, characterized in that: The relay assembly (3) also includes an iron core (32) disposed on the mounting base (10), a coil (33) disposed on the iron core (32), and a permanent magnet (34) rotatably disposed on the mounting base (10); a drive plate (5) is also movably disposed on the mounting base (10), the permanent magnet (34) is linked with the drive plate (5), and the movable contact piece (31) is located on the sliding path of the drive plate (5).
6. The over / under voltage protector according to claim 5, characterized in that: The mounting base (10) is provided with a partition (6) located between the permanent magnet (34) and the moving contact (31), the partition (6) separating the permanent magnet (34) and the moving contact (31) from each other.
7. The over / under voltage protector according to claim 1, characterized in that: The mounting base (10) has a socket (13) on its side wall facing the cover plate (11). The cover plate (11) has a fixing post (110) that is one-to-one with the socket (13). The fixing post (110) is inserted and fixed in its respective socket (13), and the fixing post (110) and the socket (13) are interference fit.