Transformer and magnetic isolation sealed solid relay
By adopting a spliced coil core structure and surface mount pad design in the magnetically isolated sealed solid relay, the problem of easy breakage of the toroidal transformer lead wires is solved, achieving efficient automated assembly and improved product stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN HONGFA SEALED RELAY CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-05-15
AI Technical Summary
The toroidal transformers used in existing magnetically isolated sealed solid-state relays have small lead diameters, making them prone to damage during assembly, leading to the risk of wire breakage and affecting product stability and reliability.
The transformer core structure is formed by splicing primary and secondary coil cores, and primary and secondary surface mount pads are set to achieve automated welding, avoiding the use of thin enameled wires for lead-out, thus improving production efficiency and stability.
It has improved production efficiency, reduced production costs, enhanced product stability and reliability, and improved assembly efficiency and market competitiveness.
Smart Images
Figure CN224248420U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of relay technology, specifically to a transformer and a magnetically isolated sealed solid relay. Background Technology
[0002] Magnetic-isolated sealed solid-state relays (SSRs) possess the characteristic that their contacts do not mechanically open or close. Therefore, they offer superior advantages in contact reliability, lifespan, operating noise, operating speed, and size. Metal-encapsulated SSRs are particularly advantageous over electromagnetic relays in applications requiring vibration resistance, moisture resistance, corrosion resistance, explosion protection, and harsh working environments, as well as in situations demanding high reliability. Furthermore, with the increasing demand for more integrated, miniaturized, and modular systems, higher requirements are placed on SSRs and other components, demanding smaller size, lighter weight, stronger load capacity, lower power consumption, and higher reliability. Existing magnetically isolated sealed SSRs typically employ toroidal transformers, which are assembled using manual soldering, resulting in low production efficiency. More importantly, due to miniaturization requirements, the four leads of the toroidal transformer are only 0.12mm diameter enameled wires, making them susceptible to damage during assembly and risk of breakage under subsequent environmental stress, ultimately leading to relay failure. Utility Model Content
[0003] To address the shortcomings of existing technologies, this utility model provides a transformer that primarily solves the technical problem of existing toroidal transformers used in magnetically isolated sealed solid-state relays, where the diameter of the lead-out enameled wire is only 0.12mm, making the lead-out wires easily damaged during assembly and posing a risk of breakage under subsequent environmental stress.
[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:
[0005] A transformer, used in a relay, includes a primary coil core and a secondary coil core spliced together to form a transformer core structure. The primary coil core has a primary coil winding, and the secondary coil core has a secondary coil winding. The primary coil core has two primary surface mount pads that are electrically connected to the beginning and end of the primary coil winding, respectively, and the secondary coil core has two secondary surface mount pads that are electrically connected to the beginning and end of the secondary coil winding, respectively.
[0006] Furthermore, the two primary surface mount pads are configured to be located at both ends of the same side of the primary coil core, and the two secondary surface mount pads are configured to be located at both ends of the same side of the secondary coil core, with the two primary surface mount pads and the two secondary surface mount pads arranged on the same side.
[0007] Furthermore, the turns ratio of the primary coil winding to the secondary coil winding is 1:2 to 1:6.
[0008] Furthermore, the turns ratio of the primary coil winding to the secondary coil winding is 1:4.
[0009] Furthermore, the primary coil core and the secondary coil core have an "I" shaped structure.
[0010] Furthermore, the primary coil core and the secondary coil core are bonded and fixed together.
[0011] Furthermore, the length, width and height dimensions of the transformer are: (3~4)mm×(1~2)mm×(3~4)mm.
[0012] Furthermore, the transformer's dimensions are: 3.2mm × 1.4mm × 3.4mm.
[0013] Based on the same inventive concept, this utility model also provides a magnetically isolated sealed solid-state relay, including any of the transformers described above.
[0014] Furthermore, it also includes a circuit board built into a magnetically isolated sealed solid-state relay, wherein the two primary surface mount pads and the secondary surface mount pads of the transformer are configured to be assembled onto the circuit board via a reflow soldering process.
[0015] The above technical solution has the following advantages or beneficial effects:
[0016] In the transformer and magnetically isolated sealed solid-state relay described in this utility model, since the primary coil core and the secondary coil core are assembled to form the transformer core structure, the primary and secondary coil cores can be wound independently, improving the convenience of core winding, thereby increasing production efficiency and reducing production costs. Furthermore, by setting corresponding primary and secondary surface mount pads on the primary and secondary coil cores, the breakage problem that is prone to occur when using enameled wire can be effectively avoided, thus improving the stability and reliability of the product. On the other hand, the use of primary and secondary surface mount pads also facilitates automated welding and assembly of the transformer, thereby improving assembly efficiency, reducing costs, and enhancing the product's market competitiveness. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural diagram of the transformer according to an embodiment of the present utility model.
[0018] Figure 2 This is a front view of the transformer structure according to an embodiment of the present invention.
[0019] Figure 3 This is a schematic diagram of the assembly structure of the transformer and circuit board according to an embodiment of the present invention.
[0020] Label Explanation:
[0021] 1. Primary coil core, 2. Secondary coil core, 3. Primary coil winding, 4. Secondary coil winding, 5. Primary surface mount pad, 6. Secondary surface mount pad, 7. Circuit board. Detailed Implementation
[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.
[0024] Please refer to the appendix. Figure 1 To be continued Figure 3 One embodiment of this utility model provides a transformer for use in relays, comprising a primary coil core 1 and a secondary coil core 2 joined together to form a transformer core structure. The primary coil core 1 has a primary coil winding 3, and the secondary coil core 2 has a secondary coil winding 4. The primary coil core 1 has two primary surface mount pads 5 electrically connected to the beginning and end of the primary coil winding 3, respectively, and the secondary coil core 2 has two secondary surface mount pads 6 electrically connected to the beginning and end of the secondary coil winding 4, respectively. It is understood that in this embodiment, since the primary coil core 1 and the secondary coil core 2 are joined together to form the transformer core structure, the primary coil core 1 and the secondary coil core 2 can be wound independently, improving the convenience of core winding, thereby increasing production efficiency and reducing production costs. Furthermore, by setting corresponding primary surface mount pads 5 and secondary surface mount pads 6 on the primary coil core 1 and secondary coil core 2, the problem of wire breakage that is prone to occur when using enameled wire can be effectively avoided, thereby improving the stability and reliability of the product. On the other hand, the use of primary surface mount pads 5 and secondary surface mount pads 6 also facilitates the automated welding and assembly of the transformer, thereby improving assembly efficiency, reducing costs, and enhancing the product's market competitiveness.
[0025] Please refer to the appendix. Figure 1 To be continued Figure 3In one preferred embodiment, two primary surface mount pads 5 are configured at both ends of the same side of the primary coil core 1, and two secondary surface mount pads 6 are configured at both ends of the same side of the secondary coil core 2, with the two primary surface mount pads 5 and the two secondary surface mount pads 6 arranged on the same side. This arrangement allows the transformer to be easily and automatically soldered and assembled with the corresponding circuit board.
[0026] Please refer to the appendix. Figure 1 In one preferred embodiment, the turns ratio of the primary coil winding 3 to the secondary coil winding 4 is 1:2 to 1:6. In another preferred embodiment, the turns ratio of the primary coil winding 3 to the secondary coil winding 4 is preferably 1:4. However, those skilled in the art should understand that in other embodiments, the turns ratio of the primary coil winding 3 to the secondary coil winding 4 can also be adjusted according to the actual needs of the relay product, and is not limited to the specific implementation disclosed in this embodiment.
[0027] Please refer to the appendix. Figure 1 In one preferred embodiment, the primary coil core 1 and the secondary coil core 2 are in an "I" shape. Preferably, the primary coil core 1 and the secondary coil core 2 are bonded and fixed together.
[0028] Please refer to the appendix. Figure 1 In one preferred embodiment, the transformer's dimensions (length, width, and height) are (3-4) mm × (1-2) mm × (3-4) mm. In another preferred embodiment, the transformer's dimensions are preferably 3.2 mm × 1.4 mm × 3.4 mm. In this embodiment, due to the ultra-miniaturization of the overall transformer structure, the strength of the transformer's pin structure becomes particularly important. This embodiment, while meeting the requirements of ultra-miniaturization, effectively avoids the risk of wire breakage caused by using surface-mount pads as lead-out structures, thus greatly improving the product's stability and reliability.
[0029] Please refer to the appendix. Figure 1 To be continued Figure 3 An embodiment of this utility model also provides a magnetically isolated sealed solid-state relay, including the transformer described above.
[0030] Please refer to the appendix. Figure 1 In one preferred embodiment, a circuit board 7 is also included, which is built into a magnetically isolated sealed solid relay. The two primary surface mount pads 5 and the secondary surface mount pads 6 of the transformer are configured to be assembled onto the circuit board 7 by a reflow soldering process.
[0031] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
Claims
1. A transformer used in a relay, characterized in that: The transformer core consists of a primary coil core (1) and a secondary coil core (2) assembled together to form the transformer core structure. The primary coil core (1) has a primary coil winding (3), and the secondary coil core (2) has a secondary coil winding (4). The primary coil core (1) has two primary surface mount pads (5) that are electrically connected to the head and tail ends of the primary coil winding (3), and the secondary coil core (2) has two secondary surface mount pads (6) that are electrically connected to the head and tail ends of the secondary coil winding (4).
2. The transformer according to claim 1, characterized in that: Two primary surface mount pads (5) are configured to be located at both ends of the same side of the primary coil core (1), and two secondary surface mount pads (6) are configured to be located at both ends of the same side of the secondary coil core (2), with the two primary surface mount pads (5) and the two secondary surface mount pads (6) arranged on the same side.
3. The transformer according to claim 1, characterized in that: The turns ratio of the primary coil winding (3) to the secondary coil winding (4) is 1:2 to 1:
6.
4. The transformer according to claim 3, characterized in that: The turns ratio of the primary coil winding (3) to the secondary coil winding (4) is 1:
4.
5. The transformer according to claim 1, characterized in that: The primary coil core (1) and the secondary coil core (2) are in the shape of an "I".
6. The transformer according to any one of claims 1 to 5, characterized in that: The primary coil core (1) and the secondary coil core (2) are bonded and fixed together.
7. The transformer according to any one of claims 1 to 5, characterized in that: The transformer's length, width, and height dimensions are: (3~4)mm × (1~2)mm × (3~4)mm.
8. The transformer according to claim 7, characterized in that: The transformer's dimensions are: 3.2mm × 1.4mm × 3.4mm.
9. A magnetically isolated sealed solid-state relay, characterized in that: The transformer includes the transformer as described in any one of claims 1 to 7.
10. The magnetically isolated sealed solid-state relay according to claim 9, characterized in that: It also includes a circuit board (7) built into a magnetically isolated sealed solid relay, wherein the two primary surface mount pads (5) and the secondary surface mount pads (6) of the transformer are configured to be mounted on the circuit board (7) by a reflow soldering process.