An electromagnetic relay

Abstract

This invention discloses an electromagnetic relay, comprising a magnetic circuit system, a contact system, and a push card. The contact system includes at least one stationary spring portion and at least one moving spring portion. The armature portion of the magnetic circuit system is connected to the moving spring portion via the push card. The moving spring portion includes a moving spring lead-out piece and multiple rigid moving spring pieces arranged side by side, with one end of each rigid moving spring piece rotatably positioned so that the other end of the rigid moving spring piece can swing around its rotation axis. Each rigid moving spring piece has a moving contact at its other end. Each rigid moving spring piece is connected to the moving spring lead-out piece by a flexible connector. The stationary spring portion has a corresponding stationary contact for each moving contact on the rigid moving spring piece of the moving spring portion. The moving spring portion of this invention enables multiple sets of contacts to be connected in parallel, allowing the invention to achieve not only high current carrying capacity but also reduced contact resistance, thereby achieving low temperature rise.

Description

Technical Field

[0001] This invention relates to the field of relay technology, and in particular to an electromagnetic relay. Background Technology

[0002] As products trend towards miniaturization, some electromagnetic relays are gradually replacing contactors, thus requiring relays to be smaller and have higher load capacity. Achieving high load capacity and low temperature rise within a small size requires the moving spring to have sufficiently strong current carrying capacity, sufficiently low contact resistance, and high short-circuit current withstand capability.

[0003] To address this, existing relays typically employ rigid moving springs to enhance current-carrying capacity. Specifically, these moving springs are made of thick pure copper. To meet the rotation requirements of the rigid moving spring, a flexible connector is generally used for electrical connection between the rigid moving spring and its lead. A reaction spring is designed on the rigid moving spring to generate a reaction force. This structure improves current-carrying capacity and is roughly U-shaped. The Lorentz force generated when current flows through the U-shaped circuit counteracts the Holm force generated by short-circuit current, thus achieving short-circuit current resistance. However, this type of rigid moving spring typically only allows for a single moving contact, rather than multiple moving contacts as needed. This results in limited current-carrying capacity and high contact resistance, leading to high heat generation under high loads. The reason why only a single moving contact can be designed on a rigid moving spring is that the rigid moving spring does not have the ability to deform. If multiple moving contacts are set on a rigid moving spring, even if the height of multiple moving contacts is the same, due to the assembly error of the parts, the manufacturing precision error of the parts, etc., it is easy to cause some moving contacts to make good contact while the rest of the moving contacts make poor contact.

[0004] In existing relays, when there are many moving spring parts, the magnetic circuit system usually uses only one push card to connect and cooperate with multiple moving spring parts. This method makes the structure of the push card more complex, which is not easy to process and form. Moreover, the distribution of multiple moving spring parts is very limited. The push card can only be cooperated between two adjacent moving spring parts, which makes it impossible to adjust the layout of multiple moving spring parts and the position of the push card according to actual needs. Summary of the Invention

[0005] This invention addresses the technical problems of limited current carrying capacity and high contact resistance in the existing dynamic spring section, and provides an electromagnetic relay to meet the requirements of high current carrying capacity and low contact resistance.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: an electromagnetic relay, including a magnetic circuit system, a contact system, and a push card. The contact system includes at least one stationary spring part and at least one moving spring part. The armature part of the magnetic circuit system is connected to the moving spring part through the push card. The moving spring part includes a moving spring lead-out piece. The moving spring part also includes multiple rigid moving spring pieces, which are arranged side by side, and one end of each rigid moving spring piece is rotatably arranged so that the other end of the rigid moving spring piece can swing around its rotation axis. The other end of each rigid moving spring piece is provided with a moving contact. Each rigid moving spring piece is connected to the moving spring lead-out piece by a flexible connector, and each rigid moving spring piece is provided with a reaction spring piece. The stationary spring part is provided with a stationary contact corresponding to the moving contact of each rigid moving spring piece of the moving spring part.

[0007] Furthermore, one end of each of the plurality of rigid moving springs is rotatably connected to one end of the moving spring lead-out piece via a rotating shaft, and the plurality of rigid moving springs share the same rotating shaft.

[0008] Furthermore, one end of the movable spring lead-out piece is connected to a first connecting member, and one end of each of the plurality of rigid movable spring pieces is respectively connected to a second connecting member, and the first connecting member and the second connecting member are connected through the rotating shaft.

[0009] Furthermore, the first connector is provided with two first lugs arranged opposite each other, and the second connector is provided with two second lugs arranged opposite each other. Each second lug is located between the two first lugs, and the rotating shaft passes through the shaft hole provided on each first lug and the shaft hole provided on each second lug.

[0010] Furthermore, the push card connects the reaction spring or rigid moving spring and reaction spring of the moving spring part; the number of rigid moving springs in the moving spring part is two, and the push card is located between the two rigid moving springs in the moving spring part so that the two rigid moving springs are subjected to force evenly.

[0011] Furthermore, the reaction spring is located on the side of the rigid moving spring that is opposite to the moving contact. The reaction spring is provided with a first slot, and the rigid moving spring is provided with a second slot. The push card is provided with a third slot for each rigid moving spring and the reaction spring on it, and the third slot engages with the first slot and the second slot.

[0012] Furthermore, the number of rigid moving springs and reaction springs in the moving spring part are two each. The first slots of the two reaction springs are arranged opposite each other, and the second slots of the two rigid moving springs are arranged opposite each other. The moving spring lead-out piece is provided with a clearance hole corresponding to the push card to avoid the push card.

[0013] Furthermore, there are multiple moving springs and multiple stationary springs arranged side by side, and multiple push cards arranged side by side, with each push card corresponding to a moving spring.

[0014] Furthermore, the reaction spring is made of stainless steel, the flexible connector is a flexible braided wire, or the flexible connector is a single layer or multiple layers of metal foil, the metal foil being copper foil or aluminum foil, or the flexible connector is composed of one or more strands of copper wire or aluminum wire; both ends of the flexible connector are electrically connected to one end of the rigid moving spring and one end of the moving spring lead-out piece, respectively; the moving spring lead-out piece is located on the side of each rigid moving spring that faces away from the moving contact.

[0015] Furthermore, it also includes a base, on which the magnetic circuit system and the stationary spring are respectively mounted, and the moving spring lead-out piece is inserted into the base; it also includes an auxiliary contact assembly, which includes an auxiliary moving spring and an auxiliary stationary spring that cooperate with each other, the auxiliary moving spring and the auxiliary stationary spring are respectively mounted on the base, and the auxiliary moving spring is driven by the armature part, the state of the auxiliary contact assembly is opposite to the state of the contact system; one end of the rigid moving spring is facing upward and the other end is facing downward.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Since the number of rigid moving springs in the moving spring part of the present invention is multiple, and the multiple rigid moving springs are arranged side by side, the present invention can realize the parallel connection of multiple sets of contacts, thereby enabling the present invention to not only achieve high current carrying capacity, but also reduce contact resistance, thereby achieving low temperature rise.

[0018] 2. Each rigid moving spring shares the same rotating shaft and is rotatably connected to the moving spring lead plate, ensuring the consistency of the movement of each rigid moving spring. In particular, one end of the moving spring lead plate is connected to a first connecting member, and one end of each rigid moving spring is connected to a second connecting member. The first and second connecting members are connected by a rotating shaft, so that the rigid moving spring and the moving spring lead plate do not need to be bent to form a structure for cooperating with the rotating shaft. This solves the problem of the high bending difficulty due to the thickness of the rigid moving spring and the moving spring lead plate. That is, it can ensure that the thickness of the rigid moving spring and the moving spring lead plate of the present invention is sufficient, not limited by processing, and meets the requirements of high current load.

[0019] 3. The push card is located between the two rigid moving springs in the moving spring section, which can make the two rigid moving springs bear force evenly, thereby avoiding the problem of one side of the contact resistance being large and the other side of the contact resistance being small due to the unbalanced force in the parallel contact group.

[0020] 4. The invention employs multiple moving spring sections and multiple stationary spring sections, arranged side by side. It also has multiple push cards, each corresponding to a moving spring section. This allows the invention to use multiple push cards in a separate configuration, with each push card independently engaging with a moving spring section. This simplifies the structure of each push card, making it easier to manufacture. Furthermore, the layout of the multiple moving spring sections and the position of the push cards can be flexibly adjusted according to actual needs. Especially when the moving spring section includes two rigid moving spring pieces, the push card can be centrally positioned instead of being limited to a side position due to structural constraints.

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the electromagnetic relay of the present invention is not limited to the embodiments. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the electromagnetic relay of the present invention. Figure 1 ;

[0023] Figure 2 This is a three-dimensional structural diagram of the electromagnetic relay of the present invention. Figure 2 ;

[0024] Figure 3 This is a three-dimensional structural schematic diagram of the movable spring portion of the present invention;

[0025] Figure 4 This is a side view of the movable spring portion of the present invention;

[0026] Figure 5 This is a three-dimensional structural schematic diagram of the moving spring lead-out piece of the present invention;

[0027] Figure 6 This is a three-dimensional structural schematic diagram of the rigid moving spring of the present invention;

[0028] Figure 7 This is a three-dimensional structural diagram of the movable spring lead-out piece and the rigid movable spring piece in the combined state of the present invention;

[0029] Figure 8 This is a three-dimensional structural diagram of the rigid moving spring and the reaction spring of the present invention in their combined state. Figure 1 ;

[0030] Figure 9 This is a three-dimensional structural diagram of the rigid moving spring and the reaction spring of the present invention in their combined state. Figure 2 ;

[0031] Figure 10 This is a three-dimensional structural diagram of the rigid moving spring, the reaction spring, and the push rod of the present invention in their combined state. Figure 1 ;

[0032] Figure 11 This is a three-dimensional structural diagram of the rigid moving spring, the reaction spring, and the pusher in the combined state of the present invention. Figure 2 ;

[0033] Figure 12 This is a three-dimensional structural diagram of the moving spring portion and the push-lock in the combined state of the present invention;

[0034] Figure 13 This is a three-dimensional structural diagram of the contact system of the present invention;

[0035] Figure 14 This is a three-dimensional structural diagram of the contact system and the push card of the present invention in a combined state;

[0036] Figure 15 This is a three-dimensional structural diagram of the armature and pusher clip of the present invention in an assembled state;

[0037] Figure 16 This is a three-dimensional structural diagram of the contact system, push card, and armature of the present invention in an assembled state;

[0038] Among them, 1. Moving spring lead-out piece, 11. Clearance hole, 2. Rigid moving spring, 21. Second slot, 3. Flexible connector, 31. Long strip hole, 4. Moving contact, 5. Reaction spring, 51. First slot, 52. Flanged edge, 6. First connector, 61. First ear piece, 7. Second connector, 71. Second ear piece, 8. Rotating shaft, 9. Pushing card, 91. Third slot, 92. First limiting part, 93. Second limiting part, 94. Fourth slot, 10. Magnetic circuit system, 110. Armature part, 111. Armature, 112. Plastic part, 113. Connecting piece, 114. Drive part, 115. Fifth slot, 20. Stationary spring part, 201. Stationary spring, 202. Stationary contact, 30. Base, 301. Partition wall, 40. Auxiliary moving spring, 50. Auxiliary stationary spring. Detailed Implementation

[0039] In this invention, the terms "first," "second," and "third," etc., are used only to distinguish similar objects, not to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. The use of terms such as "upper" and "lower" in the description to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, and is only for the convenience of describing the invention, not to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, it should not be construed as a limitation on the scope of protection of this invention. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" refers to two or more. In the description of this invention, unless otherwise explicitly specified and limited, terms such as "provided with," "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] Please see Figures 1-10 As shown, an electromagnetic relay of the present invention includes a magnetic circuit system 10, a contact system, and a push card 9. The contact system includes a stationary spring portion 20 and a moving spring portion that cooperate with each other. The armature portion 110 of the magnetic circuit system is connected to the moving spring portion via the push card 9. The moving spring portion includes a rigid moving spring lead-out piece 1 and multiple rigid moving spring pieces 2. The multiple rigid moving spring pieces 2 are arranged side by side on one side of the moving spring lead-out piece 1 in the thickness direction, that is, the multiple rigid moving spring pieces 2 are spaced apart along the width direction of the moving spring lead-out piece 1. One end of each rigid moving spring piece 2 is rotatably disposed, so that the other end of the rigid moving spring piece 2 can swing about its rotation axis. The other end of each rigid moving spring piece 2 is provided with a moving contact 4. One end of each rigid moving spring piece 2 is electrically connected to one end of the moving spring lead-out piece 1 by a flexible connector 3. The moving spring lead-out piece 1 is located on the side of each rigid moving spring piece 2 that is away from the moving contact 4. In this embodiment, one end of the rigid moving spring piece 2 faces upward and the other end faces downward, but it is not limited to this. Therefore, one end of the rigid moving spring 2 can be called the upper end, and the other end can be called the lower end. Similarly, one end of the moving spring lead-out piece 1 can be called the upper end of the moving spring lead-out piece 1. The width direction of the portion above the bottom lead-out end of the moving spring lead-out piece 1 is consistent with the width direction of the rigid moving spring 2, and the width is greater than or equal to the sum of the widths of multiple rigid moving springs 2. The number of rigid moving springs 2 and flexible connecting pieces 3 is two each, but it is not limited to this. In other embodiments, the number of rigid moving springs 2 and flexible connecting pieces 3 is more than two, such as three or four.

[0042] Each rigid moving spring 2 has one end rotatably connected to one end of the moving spring lead-out piece 1 via a rotating shaft, and all rigid moving springs 2 share the same rotating shaft 8. Specifically, one end of the moving spring lead-out piece 1 is connected to a first connecting member 6, and one end of each rigid moving spring 2 is connected to a second connecting member 7. The first connecting member 6 and the second connecting member 7 are connected through the rotating shaft 8. In this way, the rigid moving spring 2 and the moving spring lead-out piece 1 do not need to be bent to form a structure for cooperating with the rotating shaft 8, thereby solving the problem of the high bending difficulty due to the thickness of the rigid moving spring 2 and the moving spring lead-out piece 1. That is, it can ensure that the thickness of the rigid moving spring 2 and the moving spring lead-out piece 1 of the present invention is sufficient and not subject to processing limitations, meeting the requirements of high current loads.

[0043] like Figure 5 As shown, the first connecting member 6 is connected to the side of the moving spring lead-out piece 1 facing the rigid moving spring piece 2 by riveting, but not limited to this connection method. The first connecting member 6 is elongated and extends along the width direction of the moving spring lead-out piece 1. The two ends of the first connecting member 6 are bent towards the same side to form two opposing first lugs 61. Figure 6 As shown, the second connecting member 7 is connected to one end of the rigid moving spring 2 facing the side of the moving spring lead-out piece 1 by riveting, but not limited to this connection method. The second connecting member 7 is elongated and extends along the width direction of the rigid moving spring 2. The two ends of the second connecting member 7 are bent towards the same side to form two opposing second lugs 71. Figure 7 As shown, each second ear piece 71 is located between two first ear pieces 61. The rotating shaft 8 passes through the shaft hole provided on each first ear piece 61 and the shaft hole provided on the second ear piece 71. Both ends of the rotating shaft 8 are riveted to prevent the rotating shaft 8 from falling off.

[0044] In this embodiment, the flexible connector 3 is a single-layer or multi-layer metal foil, specifically copper foil or aluminum foil. The flexible connector 3 is inverted U-shaped and has elongated holes 31 extending along its length. These elongated holes 31 are approximately located on the midline of the width of the flexible connector 3 and extend towards both ends. The elongated holes 31 improve the flexibility of the flexible connector 3. In other embodiments, the flexible connector 3 is a flexible braided wire, or it may be composed of one or more strands of copper or aluminum wire.

[0045] Each rigid moving spring 2 is equipped with a reaction spring 5, which is located on the side of the rigid moving spring 2 that faces away from the moving contact 4, and the reaction spring 5 is made of stainless steel. Specifically, as shown... Figure 2 As shown, one end (the upper end) of the reaction spring 5 is a free end and has a gap with the rigid moving spring 2. The other end (the lower end) of the reaction spring 5 is riveted and fixed to the other end (the lower end) of the rigid moving spring 2. The push clip 9 connects the reaction spring 5 or the rigid moving spring 2 and the reaction spring 5 to the moving spring portion. The reaction spring 5 has a first slot 51 for engaging with the push clip 9. The first slot 51 passes through both sides of the reaction spring 5 in the thickness direction. The rigid moving spring 2 has a second slot 21 for engaging with the push clip 9. The second slot 21 passes through both sides of the rigid moving spring 2 in the thickness direction. The first slot 51 and the second slot 21 are arranged along the movement direction of the push clip 9. Figure 8 As shown, the slots of the first slots 51 of the two reaction springs 5 ​​are arranged opposite each other, and the two first slots 51 are basically symmetrical to cooperate with the same push card 9; similarly, as Figure 9As shown, the openings of the second slots 21 of the two rigid moving springs 2 are also arranged opposite each other, and the two second slots 21 are basically symmetrical. Therefore, the push card 9 is located between the two rigid moving springs 2. Specifically, the push card 9 is roughly located in the middle position of the two rigid moving springs 2 in the arrangement direction, so that the two rigid moving springs 2 can be subjected to uniform force, avoiding the problem of one side of the contact resistance being large and the other side of the contact resistance being small due to the unbalanced force on the two parallel contact groups. Each first slot 51 and second slot 21 is roughly U-shaped, and each edge of each first slot 51 is provided with a flange 52 bent towards the side where the rigid moving spring 2 is located. The root of the flange 52 is rounded, so as to avoid plastic debris being rubbed off on the push card 9 when the first slot 51 of the reaction spring 5 is engaged with the push card 9. The size of the second slot 21 of the rigid moving spring 2 is slightly larger than the size of the first slot 51, so that the edge of the second slot 21 will not rub against the push card 9. Figure 5 As shown, the movable spring lead-out piece 1 has a clearance hole 11 corresponding to the push plate 9 to avoid the push plate 9. The clearance hole 11 is a square hole with a length greater than its width. The engagement state of the push plate 9 with the rigid movable spring piece 2, the reaction spring piece 5, and the movable spring lead-out piece 1 is as follows. Figures 10-12 As shown.

[0046] Since there are two rigid moving spring plates 2 in the moving spring section, each moving spring section has two moving contacts 4 arranged side by side. The stationary spring section 20 is provided with a stationary contact 202 corresponding to the moving contact 4 on each rigid moving spring plate of the moving spring section. That is, each stationary spring section 20 has two stationary contacts 202 arranged side by side.

[0047] The moving spring part of the present invention adopts multiple rigid moving springs 2 arranged side by side, so that the moving spring part and the stationary spring part of the present invention can cooperate to realize multiple sets of contacts in parallel, thereby enabling the present invention to not only achieve high current carrying capacity, but also reduce contact resistance, and thus achieve low temperature rise.

[0048] The present invention also includes a base 30, a magnetic circuit system 10 and a stationary spring portion 20 respectively mounted on the base 30, and a moving spring lead-out piece 1 inserted into the base 30. The stationary spring portion 20 specifically includes a stationary spring piece 201 and a stationary contact 202 disposed on the stationary spring piece 201, and the stationary spring piece 201 is inserted into the base 30.

[0049] In this embodiment, there are multiple moving spring portions and multiple stationary spring portions 20, which are arranged side by side. That is, the multiple moving spring portions are arranged at intervals along the arrangement direction of the multiple rigid moving spring pieces of the moving spring portions, and the arrangement direction of the multiple stationary spring portions 20 is also the same. There are multiple push cards 9, which are arranged side by side, and each push card 9 corresponds to a moving spring portion. Specifically, there are two moving spring portions and two stationary spring portions 20, and correspondingly, there are also two push cards 9. However, this is not limited to this. In other embodiments, the number of moving spring portions and stationary spring portions 20 is more than two, such as three or four, and the number of push cards 9 is also increased accordingly. The magnetic circuit system 10 of the present invention is vertical and is arranged along the first horizontal direction of the base 30 with the contact system. The multiple (specifically two) moving spring portions of the contact system are arranged along the second horizontal direction of the base 30, and the first horizontal direction is perpendicular to the second horizontal direction. The moving spring portion of the contact system is located between the stationary spring portion 20 and the magnetic circuit system 10. The base 30 has a partition wall 301 between adjacent moving spring portions / stationary spring portions 20 to increase the creepage distance between adjacent moving spring portions / stationary spring portions 20.

[0050] As described above, the number of rigid moving spring plates 2 in the moving spring section is two. To ensure that the two rigid moving spring plates 2 are subjected to uniform force, each pusher 9 is respectively positioned between the two rigid moving spring plates 2 in the corresponding moving spring section (i.e., at the middle position of the two rigid moving spring plates 2 in the arrangement direction). As described above, each of the two rigid moving spring plates 2 in each moving spring section has two second slots 21 with opposite openings, and each of the two reaction spring plates 5 in each moving spring section has two first slots 51 with opposite openings. Correspondingly, as... Figure 15 As shown, each push card 9 has a third slot 91 corresponding to each rigid moving spring 2 and its reaction spring 5 in the moving spring portion. The third slot 91 engages with the first slot 51 and the second slot 21. The push card 9 forms a first limiting part 92 and a second limiting part 93 on opposite sides of the third slot 91. The first limiting part 92 and the second limiting part 93 are located on opposite outer sides of the reaction spring 5 and the rigid moving spring 2, respectively. That is, the first limiting part 92 is located on the side of the reaction spring 5 facing away from the rigid moving spring 2, and the second limiting part 93 is located on the side of the rigid moving spring 2 facing away from the reaction spring 5. Thus, when the coil of the magnetic circuit system 10 is energized, the armature part 110 attracts the iron core of the magnetic circuit system 10, causing the pusher 9 to push the reaction spring 5 and drive the rigid moving spring 2 to move in the direction of contact engagement, thereby making the moving contact 4 engage with the stationary contact 202; when the coil of the magnetic circuit system 10 is de-energized, the armature part 110 is reset by the action of the reset spring provided on the magnetic circuit system 10, causing the pusher 9 to pull the rigid moving spring 2 in the direction of contact disengagement, thereby making the moving contact 4 disengage from the stationary contact 202.

[0051] The armature portion 110 of the magnetic circuit system 10 includes an armature 111, a plastic component 112, and a connecting piece 113. These three components are injection molded together, forming a roughly L-shaped structure. One side of the L-shape extends horizontally, corresponding to the armature 111, while the other side extends downwards, corresponding to the connecting piece 113. The connecting piece 113 is made of metal, and its bottom connects to the push card 9. The armature 111 is separated from the connecting piece 113 by the plastic component 112, which increases the creepage distance between the magnetic circuit system 10 and the contact system. In other embodiments, the armature portion 110 may also be entirely composed of an L-shaped armature.

[0052] The connection relationship between the connecting piece 113 and the push card 9 is as follows: the end of the push card 9 that mates with the connecting piece 113 is provided with a fourth slot 94 (e.g., Figure 14 As shown), the connecting piece 113 has a fifth slot 115 for each push card 9 (as shown). Figure 15 As shown), the fourth slot 94 and the fifth slot 115 engage together, as... Figure 16 As shown. Since there are two push cards 9, there are also two fifth card slots 115 on the connecting piece 113, with the openings of the two fifth card slots 115 facing each other.

[0053] The present invention also includes an auxiliary contact assembly, which includes an auxiliary moving spring 40 and an auxiliary stationary spring 50 mounted on the base 30 and cooperating with each other. A driving part 114 is provided on the armature 111 to drive the auxiliary moving spring 40. The state of the auxiliary contact assembly is opposite to that of the contact system. Because the third slot 91 of the push card 9 engages with the second slot 21 of the rigid moving spring 2, the push card 9 has a second limiting part 93 located on the side of the rigid moving spring 2 opposite to the reaction spring 5. Therefore, when the moving contact 4 and the stationary contact 202 adhere, the rigid moving spring 2 pulls the push card 9, preventing the armature part 110 from resetting, thus keeping the auxiliary moving contact 4 on the auxiliary moving spring 40 and the auxiliary stationary contact on the auxiliary stationary spring 50 in a disconnected state. Therefore, the present invention has a forced guiding function.

[0054] The electromagnetic relay of the present invention, the parts not covered (such as the specific structure and working principle of the magnetic circuit system, etc.) are the same as or can be implemented by existing technology.

[0055] The above embodiments are only used to further illustrate an electromagnetic relay of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. An electromagnetic relay comprising a magnetic circuit system, a contact system and a pusher, the contact system comprising at least one static spring portion and at least one dynamic spring portion, an armature portion of the magnetic circuit system being connected to the dynamic spring portion via the pusher, the dynamic spring portion comprising a dynamic spring tab; characterized in that: The moving spring section also includes multiple rigid moving spring plates arranged side by side, with one end of each rigid moving spring plate being rotatably oriented so that the other end of the rigid moving spring plate can swing around its rotation axis. Each rigid moving spring plate has a moving contact at its other end. Each rigid moving spring plate is connected to the moving spring lead plate by a flexible connector, and each rigid moving spring plate has a reaction spring plate. The stationary spring section has a corresponding stationary contact for each rigid moving spring plate on the moving spring section. The push card corresponds one-to-one with the moving spring section, and the push card connects to each reaction spring plate or each rigid moving spring plate and each reaction spring plate of the corresponding moving spring section.

2. The electromagnetic relay according to claim 1, characterized in that: The number of rigid moving spring plates in the moving spring section is two, and the pusher is located between the two rigid moving spring plates in the moving spring section so that the two rigid moving spring plates are subjected to force evenly.

3. The electromagnetic relay according to claim 1, characterized in that: The reaction spring is located on the side of the rigid moving spring that is opposite to the moving contact. The reaction spring has a first slot and the rigid moving spring has a second slot. The push card has a third slot for each rigid moving spring and the reaction spring thereon. The third slot engages with the first slot and the second slot.

4. The electromagnetic relay according to claim 3, characterized in that: The moving spring section has two rigid moving springs and two reaction springs. The first slots of the two reaction springs are arranged opposite each other, and the second slots of the two rigid moving springs are arranged opposite each other. The moving spring lead-out piece is provided with a clearance hole corresponding to the push card to avoid the push card.

5. The electromagnetic relay according to claim 1, characterized in that: The number of movable spring parts and stationary spring parts are both multiple, with multiple movable spring parts arranged side by side and multiple stationary spring parts arranged side by side. The number of push cards is also multiple, with multiple push cards arranged side by side.

6. The electromagnetic relay according to claim 1, characterized in that: One end of each of the plurality of rigid moving springs is rotatably connected to one end of the moving spring lead-out piece by a rotating shaft, and the plurality of rigid moving springs share the same rotating shaft.

7. The electromagnetic relay according to claim 6, characterized in that: One end of the movable spring lead-out piece is connected to a first connecting member, and one end of each of the plurality of rigid movable spring pieces is connected to a second connecting member. The first connecting member and the second connecting member are connected through the rotating shaft.

8. The electromagnetic relay according to claim 7, characterized in that: The first connector has two first lugs arranged opposite each other, and the second connector has two second lugs arranged opposite each other. Each second lug is located between the two first lugs. The rotating shaft passes through the shaft hole provided on each first lug and the shaft hole provided on each second lug.

9. The movable spring portion according to claim 1, characterized in that: The reaction spring is made of stainless steel, and the flexible connector is a flexible braided wire, or a single or multiple layers of metal foil, the metal foil being copper foil or aluminum foil, or the flexible connector being composed of one or more strands of copper wire or aluminum wire; both ends of the flexible connector are electrically connected to one end of the rigid moving spring and one end of the moving spring lead-out piece, respectively; the moving spring lead-out piece is located on the side of each rigid moving spring that faces away from the moving contact.

10. The electromagnetic relay according to claim 1, characterized in that: It also includes a base, on which the magnetic circuit system and the stationary spring are respectively mounted, and the moving spring lead-out is inserted into the base; it also includes an auxiliary contact assembly, which includes an auxiliary moving spring and an auxiliary stationary spring that cooperate with each other, the auxiliary moving spring and the auxiliary stationary spring are respectively mounted on the base, and the auxiliary moving spring is driven by the armature part, the state of the auxiliary contact assembly is opposite to the state of the contact system; one end of the rigid moving spring is facing upward and the other end is facing downward.

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