A relay with anti-interference function

Abstract

The utility model relates to the technical field of relay with anti -interference function discloses a relay with anti -interference function, including relay shell, the front of relay shell is provided with the pin, is equipped with two groups of miniature permalloy shielding sheet on the coil outer wall up and down through the anti -interference component of setting, with high magnetic permeance shielding low -frequency magnetic field, reduce axial leakage magnetic, cooperate the nanocrystalline magnetic ring of middle and absorb high -frequency stray field, form low -frequency restraint and high -frequency absorption protection, the flexible ferrite film strip of coil top fills up the weak area of leakage magnetic, with the former two constitute three -dimensional shielding barrier, eliminate the dead angle of coil radiation, the ceramic filter sleeve of pin outer wall is two -way isolation conduction interference, the outer insulating protective sleeve insulates the capacitive coupling interference, the conductive bubble cotton pad on the base dredges the electrostatic of coil and base, the shielding net of shell outer wall blocks external high -frequency radiation, the stability of relay in complex electromagnetic environment is promoted in and out cooperation.

Description

Technical Field

[0001] This utility model relates to the field of relay technology with anti-interference function, and in particular to a relay with anti-interference function. Background Technology

[0002] Relays with anti-interference capabilities are a special type of relay that, based on the core function of traditional relays—"on / off control"—is designed with specialized electromagnetic compatibility (EMC) to resist external electromagnetic interference, reduce its own electromagnetic radiation, and ensure stable operation in complex electromagnetic environments. They are widely used in electromagnetically sensitive scenarios such as industrial control, automotive electronics, medical equipment, and smart homes. Their core value lies in solving problems caused by interference, such as "malfunctions, performance degradation, and interference with surrounding equipment," that traditional relays are prone to.

[0003] Existing relays with anti-interference functions may have problems with incomplete shielding of the coil magnetic field. In actual use, they are prone to problems such as low-frequency magnetic field axial leakage and high-frequency stray magnetic field radiation from the weak area at the top. This will cause the relay to release wide-band electromagnetic radiation when it is working, interfering with sensitive components such as surrounding sensors and chips, causing adverse effects such as equipment data errors and control logic disorder. Therefore, we propose a relay with anti-interference function. Utility Model Content

[0004] The purpose of this invention is to provide a relay with anti-interference function to solve the problem mentioned in the background art that there may be incomplete shielding of the coil magnetic field. In actual use, low-frequency magnetic field axial leakage and high-frequency stray magnetic field radiation from the weak area at the top are likely to occur. This will cause the relay to release wide-band electromagnetic radiation when it is working, which will interfere with sensitive components such as surrounding sensors and chips, and cause adverse effects such as equipment data errors and control logic disorder.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a relay with anti-interference function, comprising a relay housing, pins on the front of the relay housing, a base inside the relay housing, a coil on the top of the base, and an anti-interference component outside the coil. The anti-interference component includes a miniature permalloy shielding sheet, a nanocrystalline magnetic ring, a flexible ferrite film strip, and a conductive foam pad. The pins are connected to an insulating protective sleeve through a ceramic filter sleeve, and a shielding mesh is provided on the outer wall of the relay housing.

[0006] As a preferred embodiment, the ceramic filter sleeve is fitted onto the outer wall of the pin, the insulating protective sleeve is fitted onto the outer wall of the ceramic filter sleeve, and two sets of miniature permalloy shielding sheets are provided.

[0007] As a preferred embodiment, one set of the micro permalloy shielding sheets is fitted onto the upper part of the outer wall of the coil, and another set of the micro permalloy shielding sheets is fitted onto the lower part of the outer wall of the coil, while the nanocrystalline magnetic ring is fitted onto the middle of the outer wall of the coil.

[0008] As a preferred embodiment, the flexible ferrite film strip is fixedly connected to the top of the coil, the conductive foam pad is fixedly installed on the top of the base, and the bottom of the coil is in contact with the top of the conductive foam pad.

[0009] As a preferred embodiment, a heat dissipation assembly is provided on the top of the relay housing. The heat dissipation assembly includes a dustproof mesh. A groove is formed on the top of the relay housing, and multiple sets of heat dissipation holes are formed on the inner wall of the groove at equal intervals.

[0010] As a preferred embodiment, a dustproof mesh is provided on the inner wall of the groove, and a heat dissipation fin is provided on the top of the dustproof mesh, with the top of the heat dissipation fin flush with the top of the relay housing.

[0011] As a preferred embodiment, a thermally conductive pad is fixedly connected to the inner top wall of the relay housing, the thermally conductive pad being located directly below the groove and directly above the coil.

[0012] The technical effects and advantages of this utility model are as follows: 1. Through the anti-interference components, two sets of miniature permalloy shielding sheets are set on the upper and lower parts of the outer wall of the coil to shield low-frequency magnetic fields with high magnetic permeability and reduce axial leakage magnetic field. Together with the nanocrystalline magnetic ring in the middle to absorb high-frequency stray magnetic fields, a protection of low-frequency constraint and high-frequency absorption is formed. The flexible ferrite film strip on the top of the coil fits the irregular structure to fill the weak area of ​​leakage magnetic field. Together with the former two, they form a three-dimensional shielding barrier to eliminate the dead angle of coil radiation. The ceramic filter sleeve on the outer wall of the pins isolates bidirectional conduction interference, and the outer insulating protective sleeve further isolates capacitive coupling interference. The conductive foam pad on the base conducts static electricity between the coil and the base. The shielding mesh on the outer wall of the shell blocks external high-frequency radiation. The internal and external synergy greatly improves the stability of the relay in complex electromagnetic environments. 2. Through the designed heat dissipation components, the thermal pad on the top wall inside the relay housing is located directly below the groove and above the coil, which can quickly conduct the heat from the coil to the groove area, solving the problem of poor thermal conductivity of traditional housings. The groove on the top of the relay housing guides airflow, and the multiple sets of heat dissipation holes on its inner wall open up the internal and external convection channels, allowing heat to exchange with cold air through the channels and avoiding accumulation. The heat dissipation fins can increase the heat dissipation area and quickly dissipate heat. Moreover, the top of the fins is flush with the top of the housing, without taking up extra space and avoiding collision, effectively improving the overall heat dissipation efficiency. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 for Figure 1 A schematic diagram of the unfolded external structure; Figure 3 for Figure 2 A partial structural diagram; Figure 4 This is a cross-sectional structural diagram of the relay housing of this utility model; Figure 5 This is a schematic diagram of the internal structure of the relay housing of this utility model; Figure 6 for Figure 5 Schematic diagram of the middle section; Figure 7 for Figure 6 A schematic diagram of the split structure.

[0014] In the diagram: 1. Relay housing; 2. Pins; 3. Base; 4. Coil; 5. Anti-interference component; 501. Ceramic filter sleeve; 502. Insulating protective sleeve; 503. Miniature permalloy shielding sheet; 504. Nanocrystalline magnetic ring; 505. Flexible ferrite film strip; 506. Conductive foam pad; 507. Shielding mesh; 6. Heat dissipation component; 601. Groove; 602. Heat dissipation hole; 603. Dustproof mesh; 604. Heat dissipation fins; 605. Thermal pad. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see the appendix Figure 1 - Appendix Figure 3 and appendix Figure 5 - Appendix Figure 7 A relay with anti-interference function includes a relay housing 1, pins 2 on the front of the relay housing 1, a base 3 inside the relay housing 1, a coil 4 on the top of the base 3, and an anti-interference component 5 outside the coil 4. The anti-interference component 5 includes a miniature permalloy shielding sheet 503, a nanocrystalline magnetic ring 504, a flexible ferrite film strip 505, and a conductive foam pad 506. Pins 2 are connected to an insulating protective sleeve 502 through a ceramic filter sleeve 501. A shielding mesh 507 is provided on the outer wall of the relay housing 1. The ceramic filter sleeve 501 is fitted onto the outer wall of pins 2, and the insulating protective sleeve 502 is fitted onto the outer wall of the ceramic filter sleeve 501. Two sets of miniature permalloy shielding sheets 503 are provided.

[0017] The insulating protective sleeve 502 can prevent pin 2 from short-circuiting with external conductors, supplement the insulation function of base 3, isolate pin 2 from capacitive coupling interference with the external environment, and protect the ceramic filter sleeve 501 from mechanical damage.

[0018] A set of miniature permalloy shielding sheets 503 are fitted onto the upper part of the outer wall of the coil 4, and another set of miniature permalloy shielding sheets 503 are fitted onto the lower part of the outer wall of the coil 4. A nanocrystalline magnetic ring 504 is fitted onto the middle of the outer wall of the coil 4. A flexible ferrite film strip 505 is fixedly connected to the top of the coil 4. A conductive foam pad 506 is fixedly installed on the top of the base 3. The bottom of the coil 4 is in contact with the top of the conductive foam pad 506.

[0019] The shielding mesh 507 covers the outer wall of the relay housing 1, which can block external radio frequency interference, electromagnetic pulse and other high-frequency interference from entering the interior of the relay housing 1. At the same time, it further weakens the electromagnetic signal radiated outward by the coil 4, realizing bidirectional shielding inside and outside. The conductive foam pad 506 is conductive and can conduct the electrostatic interference or induced stray electricity accumulated on the coil 4 and the base 3 to the relay housing 1, so as to avoid electrostatic breakdown of the coil 4 or affect the contact operation.

[0020] Specifically, through the anti-interference component 5, two sets of miniature permalloy shielding sheets 503 are set on the upper and lower outer walls of the coil 4 to shield low-frequency magnetic fields with high permeability and reduce axial leakage magnetic fields. Together with the nanocrystalline magnetic ring 504 in the middle, it absorbs high-frequency stray magnetic fields, forming a protection of low-frequency constraint and high-frequency absorption. The flexible ferrite film strip 505 on the top of the coil 4 fits the irregular structure and fills the weak area of ​​leakage magnetic fields. Together with the former two, it forms a three-dimensional shielding barrier to eliminate the radiation dead zone of the coil 4. The ceramic filter sleeve 501 on the outer wall of the pin 2 provides bidirectional isolation for conducted interference. The outer insulating protective sleeve 502 further isolates capacitive coupling interference. The conductive foam pad 506 on the base 3 conducts static electricity between the coil 4 and the base 3. The shielding mesh 507 on the outer wall of the relay housing 1 blocks external high-frequency radiation. The internal and external components work together to improve the stability of the relay in complex electromagnetic environments.

[0021] Please see the appendix Figure 1 - Appendix Figure 5 A heat dissipation assembly 6 is provided on the top of the relay housing 1. The heat dissipation assembly 6 includes a dustproof mesh 603. A groove 601 is provided on the top of the relay housing 1. Multiple sets of heat dissipation holes 602 are provided on the inner wall of the groove 601. A dustproof mesh 603 is provided on the inner wall of the groove 601. A heat dissipation fin 604 is provided on the top of the dustproof mesh 603. The top of the heat dissipation fin 604 is flush with the top of the relay housing 1. A thermally conductive pad 605 is fixedly connected to the inner top wall of the relay housing 1. The thermally conductive pad 605 is located directly below the groove 601 and directly above the coil 4.

[0022] The heat dissipation holes 602 are designed with multiple sets of equidistant distribution to avoid local heat dissipation blind spots, ensure that the heat inside the relay housing 1 is evenly discharged, and prevent the temperature in a certain area from being too high. The dust filter 603 can filter out most solid impurities without obstructing air circulation, protecting the internal components from being dirty.

[0023] Specifically, through the heat dissipation component 6, the thermally conductive pad 605 on the inner top wall of the relay housing 1 is located directly below the groove 601 and directly above the coil 4, conducting the heat of the coil 4 to the groove 601 area, solving the problem of poor thermal conductivity of traditional housings. The groove 601 on the top of the relay housing 1 guides airflow, and the multiple sets of heat dissipation holes 602 on its inner wall open up the internal and external convection channels, allowing heat to be exchanged with cold air through the channels, avoiding accumulation. The heat dissipation fins 604 increase the heat dissipation area, diffuse heat, and the top of the fins is flush with the top of the relay housing 1, without taking up extra space, avoiding collision, and improving the overall heat dissipation efficiency.

[0024] Working principle of this utility model: This utility model is a relay with anti-interference function. First, before the current enters the coil 4 through pin 2, the ceramic filter sleeve 501 on the outer wall of pin 2 filters the high-frequency interference signal in the current, removing grid noise and high-frequency interference conducted by external equipment. At the same time, it suppresses the interference generated by the subsequent operation of coil 4 from being conducted to the external circuit through pin 2. The outer insulating protective sleeve 502 plays a role simultaneously, preventing pin 2 from short-circuiting with external conductors, supplementing the insulation function of the base 3, and isolating the capacitive coupling interference between pin 2 and the external environment, protecting the ceramic filter sleeve 501 from mechanical damage. The filtered current enters the coil 4. When the coil 4 is energized and generates a magnetic field, the upper and lower sets of micro-slopes on its outer wall... The permalloy shielding sheet 503 utilizes its high magnetic permeability to shield the low-frequency magnetic field generated by the coil 4, reducing axial leakage. The nanocrystalline magnetic ring 504 in the middle specifically absorbs the high-frequency stray magnetic field generated by the coil 4, forming a low-frequency constraint and high-frequency absorption protection with the micro permalloy shielding sheet 503. The flexible ferrite film strip 505 on the top of the coil 4 adheres to the irregular structure of the top of the coil 4, filling the weak area of ​​magnetic field leakage. Together with the former two, they form a three-dimensional shielding barrier, eliminating the electromagnetic radiation dead zone of the coil 4 and preventing the coil 4 from releasing electromagnetic radiation that interferes with surrounding equipment. During the operation of the coil 4, the conductive foam pad 506 on the top of the base 3 remains in contact with the bottom of the coil 4, using its own conductivity to dissipate the static electricity accumulated on the coil 4 and the base 3. Interference and induced static electricity are conducted to the relay housing 1, and then through the relay housing 1 to the external grounding system. If connected, this prevents electrostatic discharge from damaging the insulation layer of the coil 4 or affecting the operation of the internal contacts. At the same time, the shielding mesh 507 on the outer wall of the relay housing 1 completely covers the housing, blocking external radio frequency interference, electromagnetic pulses, and other high-frequency radiation from entering the housing, further weakening the electromagnetic signal radiated outward by the coil 4, achieving bidirectional shielding, and ensuring that the coil 4 stably generates a magnetic field in a complex electromagnetic environment. Secondly, when the coil 4 is energized, it generates heat. The thermal pad 605 on the top wall of the relay housing 1, located directly above the coil 4 and below the groove 601, is in direct contact with the top of the coil 4, quickly conducting the heat generated by the coil 4 to the groove on the top of the relay housing 1. In the groove 601 area, after heat is conducted to the groove 601, the groove 601 guides the orderly flow of external air. Multiple sets of equidistant heat dissipation holes 602 opened on its inner wall open the air convection channel between the inside and outside of the relay housing 1, so that the heat in the groove 601 area can be quickly exchanged with the external cold air through the heat dissipation holes 602. The dustproof mesh 603 on the inner wall of the groove 601 filters dust and impurities in the external air without obstructing the airflow. The heat transferred to the dustproof mesh 603 through the heat dissipation holes 602 is further conducted to the heat dissipation fins 604 on the top of the dustproof mesh 603. With the increased heat dissipation area, the heat dissipation fins 604 quickly diffuse the heat into the surrounding air, ultimately achieving efficient heat dissipation from inside the relay and maintaining a stable operating temperature of the relay.

[0025] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A relay with anti-interference function, comprising a relay housing (1), wherein pins (2) are provided on the front side of the relay housing (1), a base (3) is provided inside the relay housing (1), and a coil (4) is provided on the top of the base (3), characterized in that: An anti-interference component (5) is provided on the outside of the coil (4). The anti-interference component (5) includes a miniature permalloy shield (503), a nanocrystalline magnetic ring (504), a flexible ferrite film strip (505), and a conductive foam pad (506). The pin (2) is connected to an insulating protective sleeve (502) through a ceramic filter sleeve (501). A shielding mesh (507) is provided on the outer wall of the relay housing (1).

2. A relay with anti-interference function according to claim 1, characterized in that: The ceramic filter sleeve (501) is fitted on the outer wall of the pin (2), the insulating protective sleeve (502) is fitted on the outer wall of the ceramic filter sleeve (501), and two sets of the miniature permalloy shield (503) are provided.

3. A relay with anti-interference function according to claim 2, characterized in that: One set of the micro permalloy shielding sheets (503) is fitted on the upper part of the outer wall of the coil (4), and another set of the micro permalloy shielding sheets (503) is fitted on the lower part of the outer wall of the coil (4). The nanocrystalline magnetic ring (504) is fitted on the middle of the outer wall of the coil (4).

4. A relay with anti-interference function according to claim 3, characterized in that: The flexible ferrite film strip (505) is fixedly connected to the top of the coil (4), the conductive foam pad (506) is fixedly installed on the top of the base (3), and the bottom of the coil (4) is in contact with the top of the conductive foam pad (506).

5. A relay with anti-interference function according to claim 4, characterized in that: The top of the relay housing (1) is provided with a heat dissipation assembly (6), which includes a dustproof mesh (603). The top of the relay housing (1) is provided with a groove (601), and the inner wall of the groove (601) is provided with multiple sets of heat dissipation holes (602) that are evenly distributed.

6. A relay with anti-interference function according to claim 5, characterized in that: A dustproof mesh (603) is provided on the inner wall of the groove (601), and a heat dissipation fin (604) is provided on the top of the dustproof mesh (603). The top of the heat dissipation fin (604) is flush with the top of the relay housing (1).

7. A relay with anti-interference function according to claim 6, characterized in that: A thermal pad (605) is fixedly connected to the inner top wall of the relay housing (1). The thermal pad (605) is located directly below the groove (601) and directly above the coil (4).

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