A multi-contact parallel-connected snap-action electromagnetic relay

Abstract

This invention discloses a multi-contact parallel-connected snap-action electromagnetic relay, comprising a snap-action armature, a moving spring portion, and a stationary spring portion; the stationary spring portion includes two stationary spring plates for realizing current inflow and outflow; one end of the moving spring portion is connected to the armature; at least three sets of contacts are provided between the moving spring portion and the two stationary spring plates to form at least three-contact parallel circuits. This invention can realize more than three-contact parallel circuits, which can reduce contact resistance, reduce temperature rise, and reduce total Holm force, thereby preventing relay failure.

Description

Technical Field

[0001] This invention relates to the field of relay technology, and in particular to a snap-action electromagnetic relay with multiple contacts connected in parallel. Background Technology

[0002] A relay is an electronic control device with a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is commonly used in automatic control circuits and essentially acts as an "automatic switch" that uses a smaller current to control a larger current. Current high-current relays typically use two pairs of contacts connected in series to increase current carrying capacity. While it is well known that series contact achieves voltage division when disconnecting a load, which is beneficial for breaking the circuit, the two pairs of contacts in a double-break structure increase contact resistance, thereby increasing temperature rise and potentially leading to relay failure. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-contact parallel-connected snap-action electromagnetic relay. Through structural improvements, it can realize three or more parallel circuits, which can reduce contact resistance, reduce temperature rise, and reduce total Holm force, thereby preventing relay failure.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a multi-contact parallel-connected snap-action electromagnetic relay, including an armature, a moving spring part and a stationary spring part that operate in a snap-action manner; the stationary spring part includes two stationary spring plates for realizing the inflow and outflow of current; one end of the moving spring part is connected to the armature; characterized in that: at least three sets of contacts are provided between the moving spring part and the two stationary spring plates to form at least three-contact parallel circuits.

[0005] Furthermore, the other end of the moving spring portion is provided with two sets of moving contact portions connected by a bridge; one of the two stationary springs has one stationary contact portion, and the other of the two stationary springs has three stationary contact portions; one set of moving contact portions of the moving spring portion corresponds to and cooperates with the stationary contact portion of one of the stationary springs and one of the stationary contact portions of the other stationary spring, respectively; the other set of moving contact portions of the moving spring portion corresponds to and cooperates with the other two stationary contact portions of the other stationary spring, respectively; a flexible conductive element is connected to the bridging point of the other set of moving contact portions of the moving spring portion, and is connected to one of the stationary springs through the flexible conductive element, thereby forming three parallel circuits in the four pairs of moving and stationary contact portions.

[0006] Furthermore, the other end of the moving spring portion is provided with three moving contact portions; one of the two stationary springs is provided with three stationary contact portions, which correspond to and cooperate with the three moving contact portions of the moving spring portion; the other stationary spring is connected to the three moving contact portions of the moving spring portion through a soft conductive component, thereby forming three parallel circuits in the three pairs of moving and stationary contact portions.

[0007] Furthermore, the upper part of the moving spring is riveted to the armature, and the two sets of moving contact parts are staggered in the upper and lower positions; the four static contact parts of the two stationary springs are respectively located at positions corresponding to the two sets of moving contact parts.

[0008] Furthermore, one of the stationary springs has a stationary contact portion positioned to correspond to and engage with the lower moving contact portion, one of the stationary springs has a stationary contact portion positioned to correspond to and engage with the lower moving contact portion, and the other two stationary springs have stationary contact portions positioned to correspond to and engage with the upper moving contact portion.

[0009] Furthermore, the stationary contact portion is a stationary contact point, and the four stationary contact points are respectively fixed on two stationary springs. When the armature moves, the lower moving contact portion of the moving spring portion contacts the lower stationary contact portion of the two stationary springs first, relative to the upper moving contact portion of the moving spring portion contacting the upper stationary contact portion of the two stationary springs.

[0010] Furthermore, the moving spring portion includes a first oscillating spring and a second oscillating spring, each capable of elastically oscillating, and the first oscillating spring and the second oscillating spring are respectively connected to a set of moving contact parts.

[0011] Furthermore, the first oscillating spring is composed of one spring; the second oscillating spring is composed of two springs; one spring of the first oscillating spring is located in the middle, and the two springs of the second oscillating spring are located on both sides; and / or, the ends of the springs of the first oscillating spring are provided with widened portions extending to both sides, and the two moving contact portions of the first oscillating spring are respectively located in the widened portions of the first oscillating spring.

[0012] Furthermore, the two moving contact portions of the first oscillating spring are moving contacts, and a moving contact bridge or flexible wire is connected between the two widened portions of the first oscillating spring. The two moving contacts of the first oscillating spring are respectively connected to the two ends of the moving contact bridge or flexible wire of the first oscillating spring. A moving contact bridge is also connected between the ends of the two springs of the second oscillating spring. The two moving contact portions of the second oscillating spring are moving contacts, and the two moving contacts of the second oscillating spring are respectively connected to the two ends of the moving contact bridge of the second oscillating spring. The two ends of the flexible conductive element are respectively connected to the two moving contacts of the second oscillating spring, and the middle of the flexible conductive element is connected to one of the stationary springs.

[0013] Furthermore, the roots of the first and second oscillating springs are arranged upwards and fixed to the armature respectively; the downward protrusion length of the tail of the first oscillating spring is greater than the downward protrusion length of the tail of the second oscillating spring, so that the moving contact bridge of the first oscillating spring is below the moving contact bridge of the second oscillating spring.

[0014] Furthermore, the first oscillating spring is divided into two segments, and the two segments are fixedly connected and insulated from each other by an insulating member; the insulating member is located between the moving contact bridge of the first oscillating spring and the moving contact bridge of the second oscillating spring.

[0015] Furthermore, the second swing spring is integrally connected to the return spring from the root upwards; the other end of the return spring is riveted and fixed to the yoke; thereby making the upper part of the armature fit at the knife edge of the yoke.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This invention employs a multi-contact parallel-connection snap-action electromagnetic relay, comprising a snap-action armature, a moving spring portion, and a stationary spring portion; the stationary spring portion includes two stationary spring plates for current inflow and outflow; one end of the moving spring portion is connected to the armature; at least three sets of contacts are provided between the moving spring portion and the two stationary spring plates to form at least three-contact parallel circuits. This structure of the invention enables parallel circuits of three or more. When applied in high-current environments above 80A, this relay reduces contact resistance, lowers temperature rise, and reduces total Holm force, thereby preventing relay failure.

[0018] 2. Due to the staggered arrangement of the two sets of moving contact parts, the four static contact parts of the two stationary springs are respectively positioned to mate with the two sets of moving contact parts. One stationary spring has a static contact part that mates with the lower set of moving contact parts, one static contact part of the other stationary spring has a static contact part that mates with the lower set of moving contact parts, and the other two static contact parts of the other stationary spring have static contact parts that mate with the upper set of moving contact parts. The static contact parts are stationary contacts, and the four static contacts are fixed to the two stationary springs respectively. When the armature moves, the lower moving contact part of the moving spring contacts the lower static contact parts of the two stationary springs first, relative to the upper moving contact part of the moving spring contacts the upper static contact parts of the two stationary springs. When the armature resets, the upper moving contact part of the moving spring contacts the upper static contact parts of the two stationary springs first separate. As the armature continues to rotate, the lower static contact parts of the two stationary springs break off from their corresponding moving contact parts, arcing and disconnecting the load. In this structure of the invention, the two sets of moving contacts at the top are only responsible for carrying current and do not need to disconnect the load, thus eliminating the need for a double-break structure and preventing an increase in contact resistance. The two sets of moving contacts at the bottom, however, employ a double-break design, facilitating safe and rapid disconnection of the load and achieving the purpose of circuit breaking. The upper moving and stationary contacts only carry current and are made of contact materials that are conducive to reducing contact resistance; while the lower moving and stationary contacts, which connect and disconnect the load, are made of materials that are conducive to breaking and resistant to ablation. Therefore, the relay as a whole achieves both low contact resistance and good load switching performance. The ablation-resistant material used for breaking is beneficial, ensuring the relay's electrical lifespan.

[0019] 3. By configuring the moving spring portion to include a first oscillating spring and a second oscillating spring, each capable of elastic oscillation, and connecting the first and second oscillating springs to a set of moving contacts, this structure of the present invention avoids mutual interference between the two sets of moving contacts when the armature moves. This prevents the other from stopping when one of the moving contacts of the first or second oscillating spring becomes stuck and cannot continue moving towards the stationary contact, thus enhancing the reliability of the relay.

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the multi-contact parallel-connected snap-action electromagnetic relay of the present invention is not limited to the embodiments. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of a partial embodiment of the present invention;

[0022] Figure 2 This is a side view of a partial embodiment of the present invention;

[0023] Figure 3 This is a three-dimensional structural diagram of a partial embodiment of the present invention with the armature and moving spring removed;

[0024] Figure 4 This is a three-dimensional structural diagram (front view) of the armature and movable spring portion according to Embodiment 1 of the present invention;

[0025] Figure 5 This is a three-dimensional structural diagram (back side) of the armature and movable spring portion according to Embodiment 1 of the present invention;

[0026] Figure 6 This is a three-dimensional structural schematic diagram of a partial embodiment of the present invention (insulating components separated);

[0027] Figure 7 This is a top view of a partial embodiment of the present invention;

[0028] Figure 8 yes Figure 7 Schematic diagram of the cross section at point AA;

[0029] Figure 9 This is a three-dimensional structural schematic diagram of a partial embodiment two of the present invention;

[0030] Figure 10 This is a three-dimensional structural diagram of a partial embodiment of the present invention with the armature and moving spring removed;

[0031] Figure 11 This is a three-dimensional structural diagram (front view) of the armature and movable spring portion in Embodiment 2 of the present invention;

[0032] Figure 12 This is a three-dimensional structural diagram (back side) of the armature and moving spring portion of Embodiment 2 of the present invention. Detailed Implementation

[0033] Example 1

[0034] See Figures 1 to 8 As shown, a multi-contact parallel-connected snap-action electromagnetic relay of the present invention includes an armature 1, a moving spring portion 2, and a stationary spring portion 3 that operate in a snap-action manner; the stationary spring portion 3 includes two stationary spring plates 31 and 32 for realizing current inflow and outflow; one end of the moving spring portion 2 is connected to the armature 1; at least three sets of contacts are provided between the moving spring portion 2 and the two stationary spring plates 31 and 32 to form at least three-way contact parallel circuits. In this embodiment, four sets of contacts are provided between the moving spring portion 2 and the two stationary spring plates 31 and 32 to form at least three-way contact parallel circuits.

[0035] In this embodiment, the other end of the moving spring portion 2 is provided with two sets of moving contacts connected in a bridge manner, namely moving contacts 211, 212 and moving contacts 221, 222; the stationary spring 31 has one stationary contact 311, and the stationary spring 32 has three stationary contacts 321, 322, 323; one set of moving contacts 211, 212 of the moving spring portion 2 corresponds to and cooperates with the stationary contact 311 of the stationary spring 31 and the stationary contact 321 of the stationary spring 32 to form a series connection, having a double break, which facilitates safe and quick disconnection of the load and achieves the purpose of disconnecting the circuit. The other set of moving contacts 221, 222 of the moving spring portion 2 corresponds to and cooperates with the stationary contacts 322, 323 of the stationary spring 32. The bridging points of the moving contacts 221 and 222 of the moving spring part 2 are connected to a soft conductive element 4, which is connected to the stationary spring 31 through the soft conductive element 4, thereby forming three parallel circuits in the four pairs of moving and stationary contacts.

[0036] In this embodiment, the upper part of the moving spring part 2 is riveted to the armature 1, and the two sets of moving contact parts are staggered in the upper and lower positions. Specifically, the moving contact parts 221 and 222 are distributed upwards, and the moving contact parts 211 and 212 are distributed downwards. The four static contact parts of the two stationary springs 31 and 32 are respectively located at positions corresponding to the two sets of moving contact parts.

[0037] In this embodiment, the stationary contact portion of one of the stationary springs is positioned to correspond with the lower moving contact portions 211 and 212; one stationary contact portion of the other stationary spring is positioned to correspond with the lower moving contact portions 211 and 212; and the other two stationary contact portions of the other stationary spring are positioned to correspond with the upper moving contact portions 221 and 222. Specifically, the stationary contact portion 311 of the stationary spring 31 is positioned to correspond with the moving contact portion 211; the stationary contact portion 321 of the stationary spring 32 is positioned to correspond with the moving contact portion 212; and the stationary contact portions 322 and 323 of the stationary spring 32 are positioned to correspond with the moving contact portions 221 and 222.

[0038] In this embodiment, the stationary contacts 311, 321, 322, and 323 are stationary contacts, which are respectively fixed to the two stationary springs 31 and 32. When the armature 1 is activated, the lower moving contacts 211 and 212 of the moving spring portion 2 and the lower stationary contacts 311 and 321 of the two stationary springs 31 and 32 make contact first with the upper moving contacts 221 and 222 of the moving spring portion 2 and the upper stationary contacts 322 and 323 of the stationary spring 32. The upper moving and stationary contacts only carry current and are made of contact materials that are conducive to contact resistance, such as AgCuo; while the lower moving and stationary contacts that connect and disconnect the load are made of materials that are conducive to breaking and resistant to ablation, such as AgW. Specifically, one of the stationary contact points of the stationary spring and one of the stationary contact points of the other stationary spring are respectively provided with thickened portions. Specifically, the stationary contact point 311 of the stationary spring 31 and the stationary contact point 321 below the stationary spring 32 are respectively provided with thickened portions.

[0039] In this embodiment, the moving spring part 2 includes a first swinging spring 21 and a second swinging spring 22 that can swing elastically. The first swinging spring 21 and the second swinging spring 22 are respectively connected to a set of moving contact parts. The first swinging spring 21 is connected to the moving contact parts 211 and 212, and the second swinging spring 22 is connected to the moving contact parts 221 and 222.

[0040] In this embodiment, the first oscillating spring 21 is composed of one spring; the second oscillating spring 22 is composed of two springs; one spring of the first oscillating spring 21 is located in the middle, and the two springs of the second oscillating spring 22 are located on both sides. The end of the spring of the first oscillating spring 21 is provided with a widened portion extending to both sides, and the two moving contact portions 211 and 212 of the first oscillating spring 21 are respectively provided in the widened portion of the first oscillating spring 21.

[0041] In this embodiment, the two moving contact portions 211 and 212 of the first oscillating spring 21 are moving contacts, and a moving contact bridge 213 is connected between the two widened portions of the first oscillating spring 21. The two moving contacts of the first oscillating spring 21 are respectively connected to the two ends of the moving contact bridge 213 of the first oscillating spring 21. In other embodiments, a flexible wire is connected between the two widened portions of the first oscillating spring 21, and the two moving contacts of the first oscillating spring 21 are respectively connected to the two ends of the flexible wire of the first oscillating spring 21. A moving contact bridge 223 is also connected between the ends of the two springs of the second oscillating spring 22. The two moving contact portions 221 and 222 of the second oscillating spring 22 are moving contacts, and the two moving contacts of the second oscillating spring 22 are respectively connected to the two ends of the moving contact bridge 223 of the second oscillating spring 22. The two ends of the flexible conductive member 4 are respectively connected to the two moving contacts of the second oscillating spring 22, and the middle of the flexible conductive member 4 is connected to one of the stationary springs. Specifically, the middle of the flexible conductive member 4 is connected to the stationary spring 31.

[0042] In this embodiment, the roots of the first swing spring 21 and the second swing spring 22 are arranged upward and fixed to the armature 1 respectively; the downward protrusion length of the tail of the first swing spring 21 is greater than the downward protrusion length of the tail of the second swing spring 22, so that the moving contact bridge 213 of the first swing spring 21 is below the moving contact bridge 223 of the second swing spring 22.

[0043] In this embodiment, the first swing spring 21 is divided into two segments, which are fixedly connected and insulated from each other by an insulating member 24. The insulating member 24 is located between the moving contact bridge 213 of the first swing spring 21 and the moving contact bridge 223 of the second swing spring 22. Specifically, the insulating member 24 is a plastic part, and the two segments of the first swing spring 21 are fixedly connected by injection molding of the plastic part.

[0044] In this embodiment, the first swing spring 21 is integrally connected to the reset spring 23 from the root upwards; the other end of the reset spring 23 is riveted and fixed to the yoke 5; thus, the upper part of the armature 1 is fitted at the blade edge of the yoke 5. The yoke 5 is L-shaped, the iron core 7 is fixed on the coil frame 6, and the whole is horizontally arranged. The rear end of the coil frame 6 is fixed to one side of the L-shape of the yoke 5, and the other end of the L-shape of the yoke 5 is provided with a blade edge, so that the armature 1 is set at the front end of the coil frame 6 and fits at the blade edge of the yoke 5. The armature 1 rotates around the blade edge of the yoke 5 and performs a snapping action under the action of the reset spring 23.

[0045] Example 2

[0046] See Figure 9-12As shown, the present invention provides a multi-contact parallel-connected snap-action electromagnetic relay, which differs from Embodiment 1 in that the other end of the moving spring portion 2 is provided with three moving contacts; the stationary spring 32 is provided with three stationary contacts 321, 322, and 323, which correspond to and cooperate with the three moving contacts 221, 211, and 212 of the moving spring portion 2; the stationary spring 51 is connected to the three moving contacts of the moving spring portion 2 through a soft conductive element 4, thereby forming three parallel circuits in the three pairs of moving and stationary contacts.

[0047] This invention discloses a multi-contact parallel-connected snap-action electromagnetic relay. The relay comprises a snap-action armature 1, a moving spring portion 2, and a stationary spring portion 3. The stationary spring portion 3 includes two stationary spring plates 31 and 32 for current inflow and outflow. One end of the moving spring portion 2 is connected to the armature 1. At least three sets of contacts are provided between the moving spring portion 2 and the two stationary spring plates 31 and 32 to form at least three parallel contact circuits. This structure allows for more than three parallel circuits and is suitable for applications with currents above 80A. It reduces contact resistance, lowers temperature rise, and reduces total Holm force, thereby preventing relay failure.

[0048] The present invention discloses a multi-contact parallel-connected snap-action electromagnetic relay, wherein the two sets of moving contacts are arranged in an upper and lower staggered manner; the four stationary contacts 311, 321, 322, and 323 of the two stationary springs 31 and 32 are respectively arranged in positions corresponding to and cooperating with the two sets of moving contacts; and the stationary contact of one of the stationary springs is arranged in a position corresponding to and cooperating with the lower set of moving contacts, one stationary contact of the other stationary spring is arranged in a position corresponding to and cooperating with the lower set of moving contacts, and the other two stationary contacts of the other stationary spring are arranged in positions corresponding to and cooperating with the upper set of moving contacts. The stationary contact portions 311, 321, 322, and 323 are stationary contacts, which are respectively fixed to the two stationary springs 31 and 32. When the armature 1 moves, the lower moving contact portions 211 and 212 of the moving spring portion 2 and the lower stationary contact portions 311 and 321 of the two stationary springs 31 and 32 first contact each other relative to the upper moving contact portions 221 and 222 of the moving spring portion 2 and the upper stationary contact portions 322 and 323 of the stationary springs 32. When the armature returns to its original position, the upper moving contact portion of the moving spring portion separates from the upper stationary contact portions of the two stationary springs first. As the armature continues to rotate, the lower stationary contact portions of the two stationary springs break off from their corresponding moving contact portions, arcing and disconnecting the load. Specifically, one of the stationary springs and one of the stationary contact portions of the other stationary spring are respectively provided with thickened portions. In this structure of the invention, the two sets of moving contacts at the top are only responsible for carrying current and do not need to disconnect the load. Therefore, a double-break structure is not required, preventing an increase in contact resistance. The upper moving and stationary contacts only carry current and are made of contact materials that are favorable for contact resistance. The lower moving and stationary contacts, which connect and disconnect the load, are made of materials that are favorable for breaking and resistant to ablation. Thus, the relay as a whole achieves both low contact resistance and good load switching performance. The ablation-resistant material used for breaking helps ensure the relay's electrical lifespan. Therefore, the contact material for load switching is selected to be favorable for electrical life, while the contact material for load current carrying is selected to be a material with low contact resistance. With the two sets of contacts working together, the relay meets both the requirements for low contact resistance and electrical life.

[0049] This invention discloses a multi-contact parallel-connected snap-action electromagnetic relay, which employs a configuration where the moving spring portion includes a first oscillating spring 21 and a second oscillating spring 22, each capable of elastically oscillating. The first oscillating spring 21 and the second oscillating spring 22 are respectively connected to a set of moving contacts. This structure avoids mutual interference between the two sets of moving contacts when the armature 1 actuates, thus preventing the other from stopping when one of the first oscillating spring 21 or the second oscillating spring 22 becomes stuck and unable to move further towards the stationary contact, thereby enhancing the reliability of the relay.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A multi-contact parallel-connected snap-action electromagnetic relay, comprising a snap-action armature, a moving spring portion, and a stationary spring portion; the stationary spring portion includes two stationary spring plates for realizing current inflow and outflow; one end of the moving spring portion is connected to the armature; characterized in that: The moving spring portion has at least three sets of contacts between the two stationary springs to form at least three parallel contact circuits; the other end of the moving spring portion has two sets of moving contacts connected by a bridge; one of the two stationary springs has one stationary contact, and the other of the two stationary springs has three stationary contacts; one set of moving contacts of the moving spring portion corresponds to and engages with the stationary contact of one of the stationary springs and one of the stationary contact of the other stationary spring, respectively; the other set of moving contacts of the moving spring portion corresponds to and engages with the other two stationary contact of the other stationary spring, respectively; a flexible conductive element is connected to the bridging point of the other set of moving contacts of the moving spring portion, and is connected to one of the stationary springs through the flexible conductive element, thereby forming three parallel circuits in four pairs of moving and stationary contacts.

2. The multi-contact parallel-connected snap-action electromagnetic relay according to claim 1, characterized in that: The other end of the moving spring portion is provided with three moving contact portions; one of the two stationary springs is provided with three stationary contact portions, which correspond to and cooperate with the three moving contact portions of the moving spring portion; the other stationary spring is connected to the three moving contact portions of the moving spring portion through a soft conductive component, thereby forming three parallel circuits in the three pairs of moving and stationary contact portions.

3. The multi-contact parallel-connected snap-action electromagnetic relay according to claim 1, characterized in that: The upper part of the moving spring is riveted to the armature, and the two sets of moving contact parts are staggered in the upper and lower positions; the four static contact parts of the two stationary springs are respectively located at positions that correspond to and cooperate with the two sets of moving contact parts.

4. The multi-contact parallel-connected snap-action electromagnetic relay according to claim 3, characterized in that: One of the stationary reeds has a stationary contact portion positioned to mate with the lower moving contact portion; one of the stationary contact portions of the other stationary reed has a stationary contact portion positioned to mate with the lower moving contact portion; and the other two stationary contact portions of the other stationary reed have a stationary contact portion positioned to mate with the upper moving contact portion.

5. The multi-contact parallel-connected snap-action electromagnetic relay according to claim 4, characterized in that: The stationary contact portion is a stationary contact point. The four stationary contact portions are respectively fixed on two stationary springs and are divided into an upper group of stationary contact portions and a lower group of stationary contact portions. When the armature is actuated, the lower group of moving contact portions and the lower group of stationary contact portions of the moving spring portion make contact with each other first, relative to the upper group of moving contact portions and the upper group of stationary contact portions of the moving spring portion.

6. The multi-contact parallel-connected snap-action electromagnetic relay according to claim 3, characterized in that: The moving spring section includes a first oscillating spring and a second oscillating spring, each capable of elastic oscillation, and the first oscillating spring and the second oscillating spring are respectively connected to a set of moving contact parts.

7. The multi-contact parallel-connected snap-action electromagnetic relay according to claim 6, characterized in that: The first oscillating spring is composed of one spring; the second oscillating spring is composed of two springs; one spring of the first oscillating spring is located in the middle, and the two springs of the second oscillating spring are located on both sides; and / or, the end of the spring of the first oscillating spring is provided with a widened portion extending to both sides, and the two moving contact portions of the first oscillating spring are respectively located in the widened portion of the first oscillating spring.

8. The snap-action electromagnetic relay according to claim 7, characterized in that: The two moving contact portions of the first oscillating spring are moving contacts, and a moving contact bridge or flexible wire is connected between the two widened portions of the first oscillating spring. The two moving contacts of the first oscillating spring are respectively connected to the two ends of the moving contact bridge or flexible wire of the first oscillating spring. A moving contact bridge is also connected between the ends of the two springs of the second oscillating spring. The two moving contact portions of the second oscillating spring are moving contacts, and the two moving contacts of the second oscillating spring are respectively connected to the two ends of the moving contact bridge of the second oscillating spring. The two ends of the flexible conductive element are respectively connected to the two moving contacts of the second oscillating spring, and the middle of the flexible conductive element is connected to one of the stationary springs.

9. The snap-action electromagnetic relay according to claim 8, characterized in that: The roots of the first and second oscillating springs are arranged facing upwards and fixed to the armature respectively; the downward protrusion length of the tail of the first oscillating spring is greater than the downward protrusion length of the tail of the second oscillating spring, so that the moving contact bridge of the first oscillating spring is below the moving contact bridge of the second oscillating spring.

10. The multi-contact parallel-connected snap-action electromagnetic relay according to claim 9, characterized in that: The first oscillating spring is divided into two segments, which are fixedly connected and insulated from each other by an insulating member; the insulating member is located between the moving contact bridge of the first oscillating spring and the moving contact bridge of the second oscillating spring.

11. The snap-action electromagnetic relay according to claim 10, characterized in that: The second swing spring is integrally connected from the root upward to one end of the return spring; the other end of the return spring is riveted and fixed to the yoke; thus, the upper part of the armature is fitted at the knife edge of the yoke.

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