Contact system of electromagnetic relay

Abstract

The invention discloses a contact system of an electromagnetic relay, which comprises a ceramic bottom plate and is characterized in that the contact system is arranged on the ceramic bottom plate, a plurality of grooves are formed in the side edge of the ceramic bottom plate, metal sheets are fixed in the grooves, and the contact system is fixed with an electromagnetic system of the relay through the metal sheets; a mounting groove is formed around the edge of the lower end face of the ceramic bottom plate, a metal welding ring is fixed in the mounting groove, and the ceramic bottom plate and a housing of the electromagnetic relay are sealed and fixed through the metal welding ring. Conductive parts in the relay are effectively isolated from the outside by adopting the insulating ceramic bottom plate, and the conductive distance between the conductive parts in the relay is increased, so that the use safety of the relay in a high-voltage environment is ensured, the dielectric voltage resistance of the relay is improved, the insulating property and the arc extinguishing capability of the relay are further improved, and the service life of the relay is prolonged. And meanwhile, the load voltage of the relay is also improved.

Description

Technical Field

[0001] The invention belongs to the technical field of relay manufacturing, and in particular relates to a contact system of an electromagnetic relay. Background Art

[0002] With the continuous advancement of technology, high-voltage circuits are increasingly being used in power systems, new energy vehicles, rail transit, and industrial automation. As the core component that controls the on / off switching of high-voltage circuits, the reliability and safety of relays are crucial. Conventional electromagnetic relays use a metal base plate, which is sintered to the glass solder pins to form the base. This results in a short conductive distance between the solder pins 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] In order to solve the above problems existing in the prior art, the present invention provides a contact system for an electromagnetic relay. The technical problem to be solved by the present invention is achieved through the following technical solutions: A contact system for an electromagnetic relay includes a ceramic base plate, the contact system being arranged on the ceramic base plate, the side of the ceramic base plate having a plurality of grooves, the grooves being fixed with metal sheets, and the contact system being fixed to the electromagnetic system of the relay via the metal sheets; a mounting groove is provided around the edge of the lower end surface of the ceramic base plate, the mounting groove being fixed with a metal welding ring, and the ceramic base plate being sealed and fixed to the cover of the electromagnetic relay via the metal welding ring.

[0004] Furthermore, the contact system includes a first static reed, a second static reed and a dynamic reed arranged on the ceramic base plate; a first input end, a second input end, a common output end, a first output end and a second output end are provided on the ceramic base plate; the first input end and the second input end are electrically connected to the electromagnetic system; the common output end is electrically connected to the dynamic reed; the first output end is electrically connected to the first static reed, and the second output end is electrically connected to the second static reed.

[0005] Furthermore, the first static spring piece and the second static spring piece are arranged opposite to each other, and the dynamic spring piece extends between the first static spring piece and the second static spring piece and can contact or separate with the first static spring piece and the second static spring piece under the action of the electromagnetic system to complete the switching of the contacts.

[0006] Furthermore, the first static spring piece and the second static spring piece are arranged opposite to each other, and the first static spring piece and the second static spring piece are both provided with static contacts. The dynamic spring piece is arranged above the first static spring piece and the second static spring piece through a connecting card, and the connecting card is provided on a supporting piece, and the supporting piece is provided on the common output end; dynamic contacts are provided at both ends of the dynamic spring piece, and the dynamic contacts are opposite to the static contacts, and under the action of the electromagnetic system, the dynamic spring piece is deflected, so that the dynamic contacts at both ends thereof contact or separate with their corresponding static contacts, thereby completing the contact conversion.

[0007] Furthermore, four of the first static spring pieces, the second static spring pieces and the movable spring pieces are arranged side by side, thereby realizing the switching of four groups of contacts.

[0008] Beneficial effects of the present invention: The present invention adopts an insulating ceramic base plate, and utilizes the extremely high insulation resistance and dielectric strength of the ceramic material to effectively isolate the conductive components inside the relay from the outside world and increase the conductive spacing between the conductive components inside the relay. This prevents the conductive components inside the relay from breaking through the base plate under high-voltage environments, and prevents the conductive components inside the relay from breaking through each other, ensuring the safety of the relay in high-voltage environments, thereby improving the dielectric withstand voltage capability of the relay, and further improving the insulation performance and arc extinguishing capability of the relay, while also increasing the load voltage of the relay.

[0009] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1~Figure 2 It is a structural diagram of the contact system of the crystal cover electromagnetic relay; Figures 3 to 5 This is a structural diagram of the contact system of a balanced force electromagnetic relay.

[0011] Description of reference numerals: 1-Ceramic base plate; 2-Contact system; 3-Metal sheet; 4-Metal welding ring; 2-1-First static reed; 2-2-Second static reed; 2-3-Moving reed; 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-Static contact; 2-10-Connection card; 2-11-Moving contact; 2-12-Support sheet. DETAILED DESCRIPTION

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

[0013] Please also see Figure 1~Figure 2An embodiment of the present invention provides a contact system of a crystal cover electromagnetic relay, specifically including a ceramic base plate 1, wherein the contact system 2 is arranged on the ceramic base plate 1, and the side of the ceramic base plate 1 has a plurality of grooves, in which metal sheets 3 are fixed, and the contact system 2 is fixedly connected to the electromagnetic system of the crystal cover electromagnetic relay through the metal sheets 3, thereby forming a complete mechanism part of the electromagnetic relay; an installation groove is arranged around the edge of the lower end surface of the ceramic base plate 1, and a metal welding ring 4 is fixed in the installation groove, and 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 the ceramic material are utilized to effectively isolate the conductive components inside the relay from the outside world and increase the conductive spacing between the conductive components inside the relay. This prevents the conductive components inside the relay from breaking through the base plate under high-voltage environments, and prevents the conductive components inside the relay from breaking through each other, ensuring the safety of the relay in high-voltage environments. This improves the dielectric withstand voltage capability of the relay, and further improves the insulation performance and arc extinguishing capability of the relay, while also increasing the load voltage of the relay.

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

[0016] Furthermore, the contact system 2 includes a first static reed 2-1, a second static reed 2-2 and a dynamic reed 2-3 arranged 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 dynamic reed 2-3; the first output terminal 2-7, that is, the normally closed output terminal is electrically connected to the first static reed 2-1, and the second output terminal 2-8, that is, the normally open output terminal is electrically connected to the second static reed 2-2. The first static spring piece 2-1 and the second static spring piece 2-2 are arranged opposite to each other on the ceramic base plate 1, and the dynamic spring piece 2-3 extends between the first static spring piece 2-1 and the second static spring piece 2-2 and contacts or separates with the first static spring piece 2-1 and the second static spring piece 2-2 under the action of an external force, that is, the action of the electromagnetic system, thereby completing the switching of the contacts; in the initial state, the first static spring piece 2-1 contacts the dynamic spring piece 2-3, forming a normally closed contact; when the dynamic spring piece 2-3 is subjected to force, it leaves the first static spring piece 2-1 and contacts the second static spring piece 2-2 to achieve 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 on the ceramic base plate 1 by a metal-ceramic sealing process.

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

[0019] The working process of the contact system of the crystal cover electromagnetic relay is as follows: When no external force is applied, that is, when the electromagnetic system is not powered, the normally closed end contact is in a conductive state and the normally open end contact is in a non-conductive state, that is, the movable spring 2-3 is in contact with the first static spring 2-1 and separated from the second static spring 2-2; when subjected to the force of the electromagnetic system, the movable spring 2-3 is separated from the first static spring 2-1 and contacts the second static spring 2-2, that is, the normally closed end contact is in a non-conductive state and the normally open contact is in a conductive state, thereby realizing the conversion of the product contacts. Example

[0020] Please also see Figures 3 to 5An embodiment of the present invention provides a contact system for a balanced force electromagnetic relay, specifically including a ceramic base plate 1, wherein the contact system 2 is arranged on the ceramic base plate 1, and the side of the ceramic base plate 1 has a plurality of grooves, in which metal sheets 3 are fixed, and the contact system 2 is fixedly connected to the electromagnetic system of the balanced force electromagnetic relay through the metal sheets 3, thereby forming a complete mechanism part of the electromagnetic relay; an installation groove is arranged around the edge of the lower end surface of the ceramic base plate 1, and a metal welding ring 4 is fixed in the installation groove, and the ceramic base plate 1 is sealed and fixed to the cover 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 the ceramic material are utilized to effectively isolate the conductive components inside the relay from the outside world and increase the conductive spacing between the conductive components inside the relay. This prevents the conductive components inside the relay from breaking through the base plate under high-voltage environments, and prevents the conductive components inside the relay from breaking through each other, ensuring the safety of the relay in high-voltage environments. This improves the dielectric withstand voltage capability of the relay, and further improves the insulation performance and arc extinguishing capability of the relay, while also increasing the load voltage of the relay.

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

[0023] Furthermore, the contact system 2 includes a first static reed 2-1, a second static reed 2-2 and a dynamic reed 2-3 arranged 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 dynamic reed 2-3; the first output terminal 2-7, that is, the normally closed output terminal is electrically connected to the first static reed 2-1, and the second output terminal 2-8, that is, the normally open output terminal is electrically connected to the second static reed 2-2. The first static spring piece 2-1 and the second static spring piece 2-2 are each provided with four in parallel and arranged opposite to each other on the ceramic base plate 1. The first static spring piece 2-1 and the second static spring piece 2-2 are each provided with a static contact 2-9. The four dynamic spring pieces 2-3 are also provided in parallel and arranged above the first static spring piece 2-1 and the second static spring piece 2-2 through a connecting card 2-10. The two ends of the dynamic spring piece 2-3 are provided with a dynamic contact 2-11, and the dynamic contact 2-11 is arranged opposite to the static contact 2-9; and the external Under the action of force, that is, under the action of the electromagnetic system, the movable spring piece 2-3 is deflected, so that the movable contacts 2-11 at both ends thereof contact or separate from the corresponding static contacts 2-9, completing the conversion of the four groups of contacts; in the initial state, the static contact 2-9 on the first static spring piece 2-1 contacts the movable contact 2-11, which is a normally closed contact; the movable spring piece 2-3 is deflected by the force and separates from the static contact 2-9 of the first static spring piece 2-1, and contacts the static contact 2-9 of the second static spring piece 2-2, realizing 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 on the ceramic base plate 1 by a metal-ceramic sealing process.

[0025] Furthermore, a support sheet 2-12 is fixed to the upper end of the common output terminal 2-6, and the connection card 2-10 is connected to the support sheet 2-12, thereby electrically connecting the movable spring sheet 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, that is, when the electromagnetic system is not powered, the normally closed end contact is in a conductive state and the normally open end contact is in a non-conductive state, that is, the movable spring 2-3 is in contact with the first static spring 2-1 and separated from the second static spring 2-2; when subjected to the force of the electromagnetic system, the movable spring 2-3 is separated from the first static spring 2-1 and contacts the second static spring 2-2, that is, the normally closed end contact is in a non-conductive state and the normally open contact is in a conductive state, thereby realizing the conversion of the product contacts.

[0027] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of the features.

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

Claims

1. A contact system for an electromagnetic relay, characterized in that: It includes a ceramic base plate, the contact system is arranged on the ceramic base plate, the side of the ceramic base plate has a plurality of grooves, the grooves are fixed with metal sheets, and the contact system and the electromagnetic system of the relay are fixed by the metal sheets; the edge of the lower end surface of the ceramic base plate is surrounded by a mounting groove, and a metal welding ring is fixed in the mounting groove, and the ceramic base plate and the cover of the electromagnetic relay are sealed and fixed by the metal welding ring.

2. The contact system of the electromagnetic relay according to claim 1, characterized in that: The contact system includes a first static reed, a second static reed, and a dynamic reed arranged on the ceramic base plate; a first input end, a second input end, a common output end, a first output end, and a second output end are provided on the ceramic base plate; the first input end and the second input end are electrically connected to the electromagnetic system; the common output end is electrically connected to the dynamic reed; the first output end is electrically connected to the first static reed, and the second output end is electrically connected to the second static reed.

3. The contact system of the electromagnetic relay according to claim 2, characterized in that: The first static spring piece and the second static spring piece are arranged opposite to each other, and the dynamic spring piece extends between the first static spring piece and the second static spring piece and can contact or separate with the first static spring piece and the second static spring piece under the action of the electromagnetic system to complete the switching of the contact points.

4. The contact system of the electromagnetic relay according to claim 2, characterized in that: The first static spring piece and the second static spring piece are arranged opposite to each other, and the first static spring piece and the second static spring piece are both provided with static contacts. The dynamic spring piece is arranged above the first and second static spring pieces through a connecting card, and the connecting card is provided on a supporting piece, and the supporting piece is provided on the common output end; the two ends of the dynamic spring piece are provided with dynamic contacts, and the dynamic contacts are opposite to the static contacts. Under the action of the electromagnetic system, the dynamic spring piece is deflected, so that the dynamic contacts at both ends thereof contact or separate with their corresponding static contacts, thereby completing the contact conversion.

5. The contact system of the electromagnetic relay according to claim 4, characterized in that: Four of the first static spring pieces, the second static spring pieces and the movable spring pieces are arranged side by side, thereby realizing the switching of four groups of contacts.

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