A contact system for an electromagnetic relay

Abstract

This utility model discloses a contact system for an electromagnetic relay, including a ceramic base plate. The contact system is disposed on the ceramic base plate, which has several grooves on its side. Metal sheets are fixed in the grooves, and the metal sheets fix the contact system to the electromagnetic system of the relay. A mounting groove is provided around the lower edge of the ceramic base plate, and a metal welding ring is fixed in the mounting groove. The metal welding ring seals and fixes the ceramic base plate to the housing of the electromagnetic relay. By using an insulating ceramic base plate to effectively isolate the internal conductive components of the relay from the outside environment and to increase the conductive spacing between the internal conductive components of the relay, the safety of the relay under high voltage conditions is ensured, thereby improving the relay's dielectric withstand voltage capability, insulation performance, and arc extinguishing capability, and also increasing the relay's load voltage.

Description

Technical Field

[0001] This utility model belongs to the field of relay manufacturing technology, specifically relating to a contact system for an electromagnetic relay. Background Technology

[0002] With continuous technological advancements and innovations, high-voltage circuits are increasingly widely used in fields such as power systems, new energy vehicles, rail transportation, and industrial automation. Relays, as core components controlling the switching on and off of high-voltage circuits, are crucial for their reliability and safety. Traditional electromagnetic relays use a metal base plate, sintered with glass solder feet to form the base. This results in a short conductive distance between the solder feet and the base plate, leading to deficiencies in insulation and arc-extinguishing capabilities. Therefore, there is an urgent need to design an electromagnetic relay with superior insulation performance and arc-extinguishing capabilities. Summary of the Invention

[0003] To address the aforementioned problems in the prior art, this utility model provides a contact system for an electromagnetic relay. The technical problem to be solved by this utility model is achieved through the following technical solution: A contact system for an electromagnetic relay includes a ceramic base plate. The contact system is disposed on the ceramic base plate. The ceramic base plate has several grooves on its side, and a metal sheet is fixed in each groove to fix the contact system to the electromagnetic system of the relay. A mounting groove is provided around the lower edge of the ceramic base plate, and a metal welding ring is fixed in the mounting groove to seal and fix the ceramic base plate to the housing of the electromagnetic relay.

[0004] Furthermore, the contact system includes a first stationary spring, a second stationary spring, and a movable spring disposed on the ceramic base plate; the ceramic base plate is provided with a first input terminal, a second input terminal, a common output terminal, a first output terminal, and a second output terminal; the first input terminal and the second input terminal are electrically connected to the electromagnetic system; the common output terminal is electrically connected to the movable spring; the first output terminal is electrically connected to the first stationary spring, and the second output terminal is electrically connected to the second stationary spring.

[0005] Furthermore, the first stationary spring and the second stationary spring are arranged opposite to each other, and the moving spring extends between the first stationary spring and the second stationary spring and can contact or separate from the first stationary spring and the second stationary spring under the action of the electromagnetic system to complete the switching of the contact.

[0006] Furthermore, the first and second stationary springs are arranged opposite to each other, and each of the first and second stationary springs is provided with a stationary contact. The moving spring is disposed above the first and second stationary springs by a connecting clip, and the connecting clip is disposed on a support plate, which is disposed on the common output terminal. The moving spring is provided with moving contacts at both ends, and the moving contacts are opposite to the stationary contacts. Under the action of the electromagnetic system, the moving spring deflects, causing the moving contacts at both ends to contact or separate from their corresponding stationary contacts, thus completing the contact switching.

[0007] Furthermore, four of the first stationary spring, the second stationary spring, and the moving spring are arranged side by side to achieve the switching of four sets of contacts.

[0008] The beneficial effects of this utility model are: This invention employs an insulating ceramic base plate, utilizing the extremely high insulation resistance and dielectric strength of ceramic material to effectively isolate the internal conductive components of the relay from the external environment and increase the conductive spacing between the internal conductive components. This prevents the internal conductive components of the relay from breaking down the base plate under high voltage conditions, as well as from breaking down between the internal conductive components of the relay. This ensures the safety of the relay under high voltage conditions, thereby improving the relay's dielectric withstand voltage capability, and further improving the relay's insulation performance and arc extinguishing capability. It also increases the relay's load voltage.

[0009] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0010] Figures 1-2 This is a schematic diagram of the contact system of a crystal-covered electromagnetic relay; Figures 3-5 This is a schematic diagram of the contact system of a balanced force electromagnetic relay.

[0011] Explanation of reference numerals in the attached figures: 1-Ceramic base plate; 2-Contact system; 3-Metal sheet; 4-Metal welding ring; 2-1-First stationary spring; 2-2-Second stationary spring; 2-3-Moving spring; 2-4-First input terminal; 2-5-Second input terminal; 2-6-Common output terminal; 2-7-First output terminal; 2-8-Second output terminal; 2-9-Stationary contact; 2-10-Connecting card; 2-11-Moving contact; 2-12-Support plate. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto. Example

[0013] Please also see Figures 1-2This utility model embodiment provides a contact system for a crystal cover electromagnetic relay, specifically including a ceramic base plate 1. The contact system 2 is disposed on the ceramic base plate 1. The ceramic base plate 1 has several grooves on its side. A metal sheet 3 is fixed in the groove. The contact system 2 is fixedly connected to the electromagnetic system of the crystal cover electromagnetic relay through the metal sheet 3, thereby forming a complete mechanism of the electromagnetic relay. A mounting groove is provided around the lower end edge of the ceramic base plate 1. A metal welding ring 4 is fixed in the mounting groove. The ceramic base plate 1 is sealed and fixed to the cover of the electromagnetic relay through the metal welding ring 4.

[0014] By replacing the existing metal base plate with a ceramic base plate, the extremely high insulation resistance and dielectric strength of ceramic materials effectively isolate the internal conductive components of the relay from the external environment and increase the conductive spacing between the internal conductive components. This prevents the internal conductive components of the relay from breaking down the base plate under high voltage conditions, as well as from breaking down between the internal conductive components of the relay. This ensures the safety of the relay under high voltage conditions, thereby improving the relay's dielectric withstand voltage capability, which in turn improves the relay's insulation performance and arc extinguishing capability, and also increases the relay's load voltage.

[0015] Furthermore, by setting a metal welding ring 4, the ceramic base plate 1 and the housing of the crystal cover electromagnetic relay can be better fixed and sealed. Specifically, the mounting groove on the lower end edge of the ceramic base plate 1 is metallized and then fixed to the metal welding ring 4 through a metal-ceramic sealing process. Then, the metal welding ring 4 is welded to the housing. In addition, in order to ensure that the contact system can be reliably fixedly connected to the electromagnetic system through the bracket, the groove on the side of the ceramic base plate 1 is metallized and then fixed to the metal sheet through a metal-ceramic sealing process. Then, the bracket is welded to the metal sheet.

[0016] Furthermore, the contact system 2 includes a first stationary spring 2-1, a second stationary spring 2-2, and a moving spring 2-3 disposed on the ceramic base plate 1; the ceramic base plate 1 is provided with a first input terminal 2-4, a second input terminal 2-5, a common output terminal 2-6, a first output terminal 2-7, and a second output terminal 2-8; the first input terminal 2-4 and the second input terminal 2-5 are electrically connected to the electromagnetic system; the common output terminal 2-6 is electrically connected to the moving spring 2-3; the first output terminal 2-7, that is, the normally closed output terminal, is electrically connected to the first stationary spring 2-1, and the second output terminal 2-8, that is, the normally open output terminal, is electrically connected to the second stationary spring 2-2. The first stationary spring 2-1 and the second stationary spring 2-2 are disposed opposite to each other on the ceramic base plate 1. The moving spring 2-3 extends between the first stationary spring 2-1 and the second stationary spring 2-2 and, under the action of external force, i.e., the action of the electromagnetic system, contacts or separates from the first stationary spring 2-1 and the second stationary spring 2-2, thereby completing the contact switching. In the initial state, the first stationary spring 2-1 contacts the moving spring 2-3, which is a normally closed contact. When the moving spring 2-3 is subjected to force, it moves away from the first stationary spring 2-1 and contacts the second stationary spring 2-2, realizing the contact switching.

[0017] Specifically, the first input terminal 2-4, the second input terminal 2-5, the common output terminal 2-6, the first output terminal 2-7, and the second output terminal 2-8 are all fixed to the ceramic base plate 1 by a metal-ceramic sealing process.

[0018] It should be noted that both the first stationary spring 2-1 and the second stationary spring 2-2 are composed of two parts: a stationary spring and a contact point, and they make contact with the moving spring 2-3 through the contact point.

[0019] The working process of the contact system of the crystal cover electromagnetic relay is as follows: When no external force is applied, i.e., when the electromagnetic system is not energized, the normally closed contact is in a conductive state, and the normally open contact is in a non-conductive state. That is, the moving spring 2-3 is in contact with the first stationary spring 2-1 and separated from the second stationary spring 2-2. When subjected to the force of the electromagnetic system, the moving spring 2-3 separates from the first stationary spring 2-1 and contacts the second stationary spring 2-2. That is, the normally closed contact is in a non-conductive state, and the normally open contact is in a conductive state, thereby realizing the switching of product contacts. Example

[0020] Please also see Figures 3-5This utility model provides a contact system for a balanced force electromagnetic relay, specifically including a ceramic base plate 1. The contact system 2 is disposed on the ceramic base plate 1. The ceramic base plate 1 has several grooves on its side. A metal sheet 3 is fixed in the groove. The contact system 2 is fixedly connected to the electromagnetic system of the balanced force electromagnetic relay through the metal sheet 3, thereby forming a complete mechanism of the electromagnetic relay. A mounting groove is provided around the lower edge of the ceramic base plate 1. A metal welding ring 4 is fixed in the mounting groove. The ceramic base plate 1 is sealed and fixed to the housing of the electromagnetic relay through the metal welding ring 4.

[0021] By replacing the existing metal base plate with a ceramic base plate, the extremely high insulation resistance and dielectric strength of ceramic materials effectively isolate the internal conductive components of the relay from the external environment and increase the conductive spacing between the internal conductive components. This prevents the internal conductive components of the relay from breaking down the base plate under high voltage conditions, as well as from breaking down between the internal conductive components of the relay. This ensures the safety of the relay under high voltage conditions, thereby improving the relay's dielectric withstand voltage capability, which in turn improves the relay's insulation performance and arc extinguishing capability, and also increases the relay's load voltage.

[0022] In addition, by setting a metal welding ring 4, the ceramic base plate 1 and the housing of the balanced force electromagnetic relay can be better fixed and sealed. Specifically, the mounting groove on the lower end edge of the ceramic base plate 1 is fixed to the metal welding ring 4 through a metal-ceramic sealing process after being metallized.

[0023] Further, the contact system 2 includes a first stationary spring 2-1, a second stationary spring 2-2, and a moving spring 2-3 disposed on the ceramic base plate 1; the ceramic base plate 1 is provided with a first input terminal 2-4, a second input terminal 2-5, a common output terminal 2-6, a first output terminal 2-7, and a second output terminal 2-8; the first input terminal 2-4 and the second input terminal 2-5 are electrically connected to the electromagnetic system; the common output terminal 2-6 is electrically connected to the moving spring 2-3; the first output terminal 2-7, that is, the normally closed output terminal, is electrically connected to the first stationary spring 2-1, and the second output terminal 2-8, that is, the normally open output terminal, is electrically connected to the second stationary spring 2-2. Four first stationary springs 2-1 and four second stationary springs 2-2 are arranged side by side and opposite each other on the ceramic base plate 1. Each first stationary spring 2-1 and each second stationary spring 2-2 is provided with a stationary contact 2-9. Four moving springs 2-3 are also arranged side by side and are positioned above the first stationary springs 2-1 and the second stationary springs 2-2 via a connecting clip 2-10. Moving contacts 2-11 are provided at both ends of each moving spring 2-3, and the moving contacts 2-11 are positioned opposite the stationary contacts 2-9. Under the action of force, that is, under the action of the electromagnetic system, the moving spring 2-3 deflects, causing the moving contacts 2-11 at both ends to contact or separate from the corresponding stationary contacts 2-9, completing the conversion of the four sets of contacts; in the initial state, the stationary contact 2-9 on the first stationary spring 2-1 is in contact with the moving contact 2-11, which is a normally closed contact; the moving spring 2-3 is deflected by force and separates from the stationary contact 2-9 of the first stationary spring 2-1, and contacts the stationary contact 2-9 of the second stationary spring 2-2, realizing the contact conversion.

[0024] Specifically, the first input terminal 2-4, the second input terminal 2-5, the common output terminal 2-6, the first output terminal 2-7, and the second output terminal 2-8 are all fixed to the ceramic base plate 1 by a metal-ceramic sealing process.

[0025] Furthermore, a support piece 2-12 is fixed to the upper end of the common output terminal 2-6, and the connecting card 2-10 is connected to the support piece 2-12, thereby electrically connecting the moving spring 2-3 to the common output terminal 2-6.

[0026] The working process of the contact system of the balanced force electromagnetic relay is as follows: When no external force is applied, i.e., when the electromagnetic system is not energized, the normally closed contact is in a conductive state, and the normally open contact is in a non-conductive state. That is, the moving spring 2-3 is in contact with the first stationary spring 2-1 and separated from the second stationary spring 2-2. When subjected to the force of the electromagnetic system, the moving spring 2-3 separates from the first stationary spring 2-1 and contacts the second stationary spring 2-2. That is, the normally closed contact is in a non-conductive state, and the normally open contact is in a conductive state, thereby realizing the switching of product contacts.

[0027] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0028] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A contact system of an electromagnetic relay, characterized by, The device includes a ceramic base plate, on which the contact system is mounted. The ceramic base plate has several grooves on its side, and a metal sheet is fixed in each groove to fix the contact system to the electromagnetic system of the relay. A mounting groove is provided around the lower edge of the ceramic base plate, and a metal welding ring is fixed in the mounting groove to seal and fix the ceramic base plate to the housing of the electromagnetic relay.

2. The contact system of an electromagnetic relay according to claim 1, characterized in that, The contact system includes a first stationary spring, a second stationary spring, and a movable spring disposed on the ceramic base plate; the ceramic base plate is provided with a first input terminal, a second input terminal, a common output terminal, a first output terminal, and a second output terminal; the first input terminal and the second input terminal are electrically connected to the electromagnetic system; the common output terminal is electrically connected to the movable spring; the first output terminal is electrically connected to the first stationary spring, and the second output terminal is electrically connected to the second stationary spring.

3. The contact system of the electromagnetic relay according to claim 2, characterized in that, The first and second stationary springs are arranged opposite to each other, and the moving spring extends between the first and second stationary springs and can contact or separate from the first and second stationary springs under the action of the electromagnetic system to complete the switching of contacts.

4. The contact system of the electromagnetic relay according to claim 2, characterized in that, The first and second stationary springs are arranged opposite to each other, and each stationary spring has a stationary contact. The moving spring is mounted above the first and second stationary springs via a connecting clip, which is mounted on a support plate, which is mounted on the common output terminal. The moving spring has moving contacts at both ends, which are opposite to the stationary contacts. Under the action of the electromagnetic system, the moving spring deflects, causing the moving contacts at both ends to contact or separate from their corresponding stationary contacts, thus completing the contact switching.

5. The contact system of the electromagnetic relay according to claim 4, characterized in that, The first stationary spring, the second stationary spring, and the moving spring are arranged in four rows side by side, thereby realizing the switching of four sets of contacts.

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