KR20220142842A - Elastic contact plate structure of electromagnetic relay - Google Patents

Abstract

A contact elastic plate structure of an electromagnetic relay is provided. The contact elastic plate structure (1) of the present invention includes at least one elastic plate assembly (10) and at least one contact structure (11). The elastic plate assembly (10) includes first, second, third, and fourth plate bodies (101, 102, 103, and 104) sequentially stacked and fixed from top to bottom. A first attachment hole (1012) is drilled at one end of the first plate body (101) having a first convex arc bending portion (1011). A second attachment hole (1022) is drilled at one end of the second plate body (102) having a second convex arc bending portion (1021). The first convex arc bending portion (1011) and the second convex arc bending portion (1012) installed below the first convex arc bending portion (1011) have a gap therebetween. A third attachment hole (1031) is drilled at one end of the third plate body (103). The fourth plate body (104) has a fixed section (1041) and an elastic section (1042). A fourth attachment hole (1043) is drilled in the fixed section (1041). In addition, a plurality of slits (1044) are provided in the fourth plate body (104). Only the fixed section (1041) is mutually fixed with the third plate body (103). The contact structure (11) is fixed through the first attachment hole (1012), the second attachment hole (1022), the third attachment hole (1031), and the fourth attachment hole (1043). The stability can be greatly improved.

Description

ELASTIC CONTACT PLATE STRUCTURE OF ELECTROMAGNETIC RELAY

The present invention relates to a relay field, and more particularly, to a contact elastic plate structure applied to an electromagnetic relay.

A relay is also called a "relay" by an alias, and is an electronic control component. When classified based on the principle of operation, it is largely divided into optical relays, electromagnetic relays, and thermal relays.

Taking an electromagnetic relay as an example, it is generally provided with an electromagnetic coil, a movable contact, and a fixed contact, and at the same time, a control circuit is connected to the fixed contact outward, and after the electromagnetic coil is energized, the movable contact is It achieves the purpose of controlling electrical opening and closing according to the displacement according to the electromagnetic action of the electromagnetic coil. The movable contact is generally mounted on a movable elastic plate, and the movable contact to be interlocked with it is moved to conduct or cut off the fixed contact. In some models of the relay, in consideration of the movement demand, etc., a method of designing a movable elastic plate in three structures is also shown. The movable elastic plate structure described above includes three plate bodies, and at the same time, a through hole for facilitating attachment of the contact structure on the plate body is drilled, but this movable elastic plate is movable. On the other hand, although it has better performance compared to a single plate body, since the rigidity is too strong, the elastic expression after receiving pressure becomes insufficient, and the stability of the contact strength of the contact becomes unstable, so that the relay becomes the contact It becomes a situation which tends to produce high temperature or the instability of an electrical resistance value resulting from contact imperfection, and further, since a large deformation|transformation occurs instantaneously, there existed a fault that it fell into rupture or irrecoverability.

An object of the present invention is to provide a contact elastic plate structure of an electromagnetic relay that can significantly increase the compression force and stability of the contact when the fixed contact and the movable contact are in contact in the electromagnetic relay.

In order to achieve the above object, the contact elastic plate structure of the electromagnetic relay according to the present invention includes at least one elastic plate assembly and at least one contact structure, wherein the elastic plate assembly includes a first plate body and the first A second plate body stacked on the lower side of the plate body and mutually fixed to the first plate body, and a third plate stacked under the second plate body and mutually fixed to the second plate body at the same time A first attachment hole is provided in one end of the first plate body including a sieve and a fourth plate body overlapping the lower side of the third plate body, the first plate body having a first convex arc refraction part; 2 A second attachment hole corresponding to the first attachment hole is drilled in one end of the second plate body having a convex arc refracting part, wherein the second convex arc refracting part is provided below the first convex arc refracting part, Also, the first convex arc refracting part and the second convex arc refracting part have a gap between each other, and a third attachment hole corresponding to the second attachment hole is drilled at one end of the third plate body. provided, wherein the fourth plate body has a fixing section that is mutually fixed to the third plate body, and an elastic section that is not mutually fixed with the third plate body, and is formed in the fixing section corresponding to the third attachment hole. A fourth attachment hole is drilled, and a plurality of slits are provided in the fourth plate body, and the contact structure includes the first attachment hole, the second attachment hole, the third attachment hole, and the fourth attachment hole. is fixed through the Thereby, since the contact elastic plate structure of the present invention can provide a stress strain state of an appropriate structure, in a space where the relay is limited, it provides stable smooth operation, thereby improving the operation performance and reliability of the relay. achieve effective augmentation.

Summarizing the above, the contact elastic plate structure of the present invention has the above technical characteristics, and by effectively improving the stress expression of the elastic plate, the relationship between the stress intensity and the amount of deformation of the contact elastic plate structure has positive linearity. ), it is possible to improve the pressing force at the time of contact of the contact in a limited space of the electromagnetic relay in a limited space of the electromagnetic relay, and by eliminating the excessive change of the electrical resistance value, the conductive circuit can be made more stable. At the same time, the present invention may be provided with better operating smoothness. More specifically, by the provision of the fourth plate body and its elastic section, fixed section and slit, a more suitable displacement smoothness during operation is obtained, and the corresponding contact structure and corresponding other contacts in the relay are mutually connected. The pressing force at the time of contact can be improved, and conversely, in this way, the number of endurance of the contact switch can also be increased. In addition, in consideration of the requirements of each item in actual operation, the present invention provides details on the fourth plate body even with respect to a plurality of the slits. An installation aspect is proposed, and based on this, the fourth plate body can not only effectively achieve the above-described effects, but also combine its own rigidity with a required elastic change.

BRIEF DESCRIPTION OF THE DRAWINGS It is an exploded schematic diagram of the contact elastic plate structure of one Embodiment of this invention.
2A is an assembly schematic diagram of a contact elastic plate structure according to an embodiment of the present invention.
Fig. 2B is a schematic assembling view from another perspective of the contact elastic plate structure according to the embodiment of the present invention.
Figure 3 is an application schematic diagram (1) of the contact elastic plate structure of one embodiment of the present invention.
4 is an application schematic diagram (2) of the contact elastic plate structure of one embodiment of the present invention.
5 is a schematic diagram of some applications of a conventional elastic plate structure.
6 is a partial exploded schematic view of a contact elastic plate structure according to another embodiment of one embodiment of the present invention.
7 is an assembly schematic diagram of a contact elastic plate structure according to another embodiment of one embodiment of the present invention.
Fig. 8 is a structural schematic diagram of a fourth plate body according to still another embodiment of one embodiment of the present invention.

Reference is made to FIGS. 1 , 2A, 2B, 3 and 4 . These are an exploded schematic diagram of the contact elastic plate structure of one embodiment of the present invention, an assembly schematic diagram of the same structure, an assembly schematic diagram of the same structure from different perspectives, and an application schematic diagram (1) and an application schematic diagram (2) of the same structure. The contact elastic plate structure 1 of the electromagnetic relay disclosed in the present invention includes at least one elastic plate assembly 10 and at least one contact structure 11 . The elastic plate assembly 10 includes a first plate body 101 , a second plate body 102 , a third plate body 103 , and a fourth plate body 104 , and the first plate body ( 101 has a first convex arc refracting portion 1011 , and a first mounting hole 1012 is drilled at one end of the first plate body 101 . The second plate body 102 is superimposed on the lower side of the first plate body 101 and is mutually fixed to the first plate body 101, and the second plate body 102 has a second convex arc refracting part ( 1021), and second attachment holes 1022 corresponding to the first attachment holes 1012 are drilled at one end, among them, the second convex arc refracting portion 1021 is the first convex arc refracting portion It is provided below the 1011, and the first convex arc refracting portion 1011 and the second convex arc refracting portion 1021 have a gap between them. The third plate body 103 is superimposed on the lower side of the second plate body 102 , and is mutually fixed to the second plate body 102 , and has a second attachment hole ( Third attachment holes 1031 corresponding to each other 1022 are drilled. The fourth plate body 104 is superimposed on the lower side of the third plate body 103 , and the fourth plate body 104 has a fixing section 1041 and an elastic section 1042 , and is attached to the fixing section 1041 . A fourth attachment hole 1043 corresponding to the third attachment hole 1031 is drilled, and a plurality of slits 1044 are provided in the fourth plate body 104, among which, a fixing section 1041 is provided. is mutually fixed with the third plate body 103 , and the elastic section 1042 is not mutually fixed with the third plate body 103 . The contact structure 11 penetrates and is fixed to the first attachment hole 1012 , the second attachment hole 1022 , the third attachment hole 1031 , and the fourth attachment hole 1043 . Among them, more preferably, the first plate body 101 , the second plate body 102 , and the third plate body 103 can be produced by selecting a copper material, for example, and the fourth plate body 104 . ) can be made of stainless steel material.

Therefore, the present invention allows the contact elastic plate structure 1 to have an appropriate stress versus strain relationship in the contact elastic plate structure 1 by effectively adjusting the elastic expression after the elastic plate is subjected to pressure, so that the contact point of the contact elastic plate structure 1 is The effect of optimizing the expression of the contact pressing force between the structure 11 and other contact points is obtained. According to the structural features described above, the relationship between stress and deformation of the contact elastic plate structure 1 is that as the applied force (pressing force) gradually increases, the amount of deformation gradually increases with it, and when the stress (received pressure) gradually decreases, the contact point The relative relationship in which the elastic plate structure (1) gradually recovers is shown, and since it is continuously subjected to pressure, it is possible to make it difficult to cause a problem of being unable to recover due to an instantaneous large deformation, and the contact elastic plate structure (1) Appears a characteristic that approximates the relationship between the stress intensity and the amount of strain in the forward linearity, and approaches the ideal relationship state of the spring stress strain. In addition, since the rigidity of the structure is very strong by this, only slight deformation occurs even when the applied force is maximized, so it is possible to avoid a situation in which contact with other contact points is difficult, and a large instantaneous deformation occurs in the elastic plate. The high temperature caused by the contact structure 11 being brought into contact with another contact and the contact of the contact is incompletely formed if the rigidity of the structure is too low Instability of operation and electrical resistance value can be avoided. Therefore, due to effectively improving the pressing force at the time of application of the contact elastic plate structure 1 in the limited space of the electromagnetic relay, excessive increase in operating temperature caused by contact imperfection of the contact or excessive change in electrical resistance value, etc. Avoiding the problem is achieved. More specifically, the fourth plate body 104 of the contact elastic plate structure 1 has a fixing section 1041 , an elastic section 1042 and a plurality of slits 1044 thereof, and also includes a fixing section 1041 . The third plate body 103 and the mutually fixed section, in this way, via the elastic section 1042 and a plurality of its slits 1044, the elastic deformation upon application to the contact elastic plate structure 1 can be provided. In addition, the relationship of the stress intensity of the contact elastic plate structure 1 to the deformation amount exhibits a characteristic of improving the contact force between the contact structure 11 and the other contact points, and approaching the change of the forward linearity. In addition, by providing a plurality of the slits 1044, the relative formation of the structure having the ribs on the fourth plate body 104 makes it possible to uniformly distribute the applied resistance pressure to the position of the contact structure 11 . It is possible to avoid the phenomenon of some bending or distortion occurring during operating stress, and it is possible to increase the contact stability between the contact structure 11 and other contact points.

The contact elastic plate structure 1 can be applied in various electromagnetic relays to be used as a movable elastic plate, and according to an electromagnetic action, by contacting or breaking contact with another contact by interlocking and displacing it, the electrical of the electromagnetic relay The effect of controlling the normal opening and closing is obtained. In the electromagnetic relay, the contact elastic plate structure 1 may be provided in a single set or a plurality of sets. Here, the schematic diagram of the internal structure of a simple electromagnetic relay is shown in FIGS. 3 and 4, and in this embodiment, an application method of providing two sets of contact elastic plate structures 1 in the electromagnetic relay will be described as an example. A rotary bridge 20, two fixed contact plates 21 and two extension arms 22 may be provided in the electromagnetic relay, and the rotary bridge 20 is formed from opposite sides of the rotary bridge 20 from opposite sides. It is used to control the plurality of contact elastic plate structures 1 while having a first rotation plate 201 and a second rotation plate 202 provided to extend outward, and the first rotation plate 201 includes An arbitrary one end of the extension arm 22 is engaged and installed, and an arbitrary one contact elastic plate structure 1 is connected to the other end of the extension arm 22 and rotates a second time. The plate 202 is installed by engaging with the extension arm 22 of a separate body, and the other contact elastic plate structure 1 is connected to the other end of the extension arm 22 and installed. The plurality of fixed contact plates 21 are respectively provided corresponding to the plurality of contact elastic plate structures 1 . When the rotary bridge 20 moves under the electromagnetic action, the plurality of contact structures 11 of the plurality of contact elastic plate structures 1 can be synchronously interlocked therewith, and the plurality of fixed contact plates 21 can be synchronously interlocked. The electrical state of the electromagnetic relay is controlled by contacting or disconnecting the contact above.

Here, reference is also made to FIG. 5, which is a schematic diagram of some applications of the conventional elastic plate structure. The conventional elastic plate structure (A) has three structures as shown, and when in contact with the fixed contact (B) under pressure, the conventional elastic plate structure (A) has a structure for adjusting elastic stress Since it is not, once it receives pressure and moves toward the direction of the fixed contact (B), it tends to undergo a large bending deformation due to an instantaneous action force, and rather the contact (C) and the fixed contact (C) on the conventional elastic plate structure. Since the contact with B) is formed in an incomplete state, the problem which causes high temperature or instability of an electrical resistance value is as shown in FIG. Returning to the present invention, FIG. 3 shows a state in which the plurality of contact elastic plate structures 1 are not in contact with the contacts of the plurality of fixed contact plates 21, and FIG. 4 shows the plurality of contact elastic plate structures ( 1) is shown in a state in which contact with the contact points of the plurality of fixed contact plates 21 is possible according to the movement of the rotary bridge 20, and the structure of the fourth plate body 104 of the plurality of contact elastic plate structures 1 When the plurality of contact elastic plate structures 1 are subjected to pressure by the ) is delivered to the section in which it is provided, and based on this, it is pushed and moved so as to be brought into contact with the contact point of the fixed contact plate 21, and in this way, the plurality of contact elastic plate structures 1 are partially bent. Since the defective phenomenon of contact incomplete contact does not occur, the plurality of contact structures 11 can be reliably formed in a stable contact state with the contact points of the plurality of fixed contact plates 21 . In addition, according to the structural design in which a plurality of the slits 1044 are drilled in the fourth plate body 104 as described above, between the adjacent slits 1044 and 1044, a front rib, a central rib and Because the rear rib is formed, and the resistance pressure applied thereto can be uniformly distributed to positions called the front of the contact structure 11, the periphery of the contact structure 11, and the rear of the contact structure 11, some bending However, the occurrence of the distortion phenomenon can be avoided, and the contact stability between the contact structure 11 and other contact points can be increased.

In one embodiment, the plurality of slits 1044 on the fourth plate body 104 may have a long strip shape, and the extension direction of each of the slits 1044 is parallel to each other, and thus Thus, it is possible to preserve and maintain the contact elastic plate structure 1 in an appropriate application presentation, and also to improve operational stability. In addition, the arrangement of the plurality of slits 1044 may be provided to extend in the direction of the elastic section 1042 with the peripheral edge of the fourth attachment hole 1043 as a starting point, and in this way, the plurality of the slits 1044 may be provided. ), the state of not exceeding the fourth attachment hole 1043 is revealed, and the influence on the operation of the contact structure 11 can be avoided, and the rigidity of the fourth plate body 104 is secured. This can be done, and it is possible to avoid the lack of contact of the contact structure 11 caused by being too soft and deforming easily. In addition, when the number of the plurality of slits 1044 is an odd number, the open hole area of the slit 1044 located at the intermediate position is larger than the open hole area of each of the plurality of slits 1044 on both sides. As a result, the fourth plate body 104 has a more uniformly symmetrical stress state, and helps to improve the stress strain state of the contact elastic plate structure 1 to have better performance in application. In the present embodiment, the number of the plurality of slits 1044 will be described by taking five as an example. Five slits 1044 are drilled on the plate body 104, and the open hole area of the slit 1044 located at the intermediate position is larger than the open hole area of the other plurality of slits 1044 on both sides. It can be seen that large At the same time, the plurality of the slits 1044 are each long strip-shaped and parallel to each other, and in order to avoid the influence on the contact structure 11, the ends of the plurality of the slits 1044 are any of the fourth attachment holes (1043) should not be exceeded.

In addition, in another embodiment, the end edge proximate the fourth attachment hole 1043 of at least one of the slits 1044 exhibits a beveled or arced shape corresponding to the peripheral edge of the fourth attachment hole 1043 . Based on this, while maintaining a certain distance from the fourth attachment hole 1043, that is, the contact structure 11, the inclined or round end edge structure causes deformation when pressure is applied. is able to respond further to the needs.

In addition, in order to easily fix and provide the contact elastic plate structure 1 in the electromagnetic relay, more preferably, at least at the other end of the first plate body 101 opposite to the end at which the first attachment hole 1012 is provided. One first assembling hole 1013 is provided, and at least one second assembling hole 1023 is provided at the other end opposite to one end of the second plate body 102 on which the second attachment hole 1022 is provided, , at least one third assembling hole 1032 is provided at the other end of the third plate body 103 opposite to one end on which the third attachment hole 1031 is provided, and a first assembling hole 1013, a second The assembling hole 1023 and the third assembling hole 1032 are in communication with each other, so that the first assembling hole 1013, the second assembling hole 1023, and the third assembling hole 1013 in the contact elastic plate structure 1 are The end provided with the hole 1032 is fixedly assembled with the terminal circuit of the electromagnetic relay, and at the same time emerges a state of electrical conduction, and the end at which the contact structure 11 of the contact elastic plate structure 1 is installed is accompanied therewith It can be displaced by interlocking it.

3, 4, 6 and 7 are referred to together. Among them, FIGS. 6 and 7 are an exploded schematic diagram and an assembly schematic diagram of a contact elastic plate structure according to another embodiment of an embodiment of the present invention, respectively. In this embodiment, the number of elastic plate assemblies 10 of the contact elastic plate structure 1 is two, and the two elastic plate assemblies 10 are provided in parallel in parallel with a gap, and at the same time, the two elastic plates The other end of the assembly 10, which is not provided with the contact structure 11, is provided to be fixed to each other. The contact elastic plate structure 1 may be of a form having a single contact, and as in the structural aspect shown in FIGS. 6 and 7, two sets may be installed, and in this way, it is applied in a double contact type electromagnetic relay. can do. In addition, since the two elastic plate assemblies 10 are spaced apart, it is possible to avoid contacting each other and affecting the electrical conduction state. In addition, the detailed structure of the single elastic plate assembly 10 will be described with reference to FIG. 1 together again.

In addition, one side of one end on which the contact structure 11 of each elastic plate assembly 10 is provided may be in the form of a step shape that gradually expands, and in this way, when the two elastic plate assemblies 10 are too close, various It can be further prevented from causing the occurrence of a poor electrical conduction phenomenon. Referring to FIGS. 6 and 7 , according to the aspect of forming the step-like structure that is gradually enlarged as described above, a relatively large gap is formed at the end near the contact structure 11 of the plurality of elastic plate assemblies 10 to interfere with each other. It can be seen that the effect of

Likewise, the number of the elastic plate assemblies 10 is two, and the detailed technical features that can be added to each of the above-mentioned terms are also applicable here, and the plurality of pieces on the fourth plate body 104 of each elastic plate assembly 10 are Taking the slit 1044 as an example, for example, each of the slits 1044 may have a long strip shape, and the extension direction of each of the slits 1044 may be implemented in a structure that is parallel to each other. In addition, the plurality of slits 1044 may be provided to extend in the direction of the elastic section 1042 from the peripheral edge of the corresponding fourth attachment hole 1043 as a starting point. When the number of the plurality of slits 1044 is an odd number, the open hole area of the slit 1044 positioned at the intermediate position is larger than the open hole area of each of the plurality of slits 1044 on both sides, and in this embodiment In , the number of the plurality of slits 1044 is 5, and the short edge near the fourth attachment hole 1043 of at least one of the slits 1044 corresponds to the peripheral edge of the fourth attachment hole 1043 Therefore, it shows an inclined shape or a round shape. As the related detailed techniques and corresponding effects have already been described above, please refer to the corresponding contents again.

Reference is again made to FIGS. 3 and 4 . When applied, it is the same as the structural state in which a single elastic plate assembly 10 is provided, and the contact elastic plate structure 1 having two elastic plate assemblies 10 is provided for installation in an electromagnetic relay, Similarly, a single set or a plurality of sets may be installed, and each contact elastic plate structure (1) has a structure of a plurality of extension arms (22) to form a first rotation plate (201) and a second rotation plate (202) of the rotation bridge (20). ), the two contact structures 11 on each contact elastic plate structure 1 and the contact on the corresponding fixed contact plate 21 may contact or break with each other. For detailed operation techniques, the contents of the above-mentioned corresponding paragraphs are also referred to, and detailed descriptions herein are omitted.

Reference is made to Fig. 8, which is a structural schematic diagram of a fourth plate body according to still another embodiment of one embodiment of the present invention. A plurality of the slits 1044 of the fourth plate body 104 are of the elastic section 1042 with the circumferential edge of the fourth attachment hole 1043 as a starting point, in addition to the parallel long strip-like structure as described above. It may be provided in the form of being provided radially in the direction, see FIG. 8 . Thereby, since the contact elastic plate structure 1 has a more preferable deformed state, it can prevent that rigidity is too high and it affects the operation|movement of the contact structure 11. FIG.

Summarizing the above, the contact elastic plate structure (1) of the present invention according to the above technical features, by effectively improving the stress expression of the elastic plate, the relationship between the stress intensity and the amount of deformation of the contact elastic plate structure (1) By bringing the forward linearity closer to the ideal change state, the pressing force at the time of contact in the limited space of the electromagnetic relay can be improved, and the conductive circuit can be made more stable by eliminating the excessive change in the electrical resistance value. , the present invention may have better operational smoothness. More specifically, by the installation of the fourth plate body 104 and its elastic section 1042, fixing section 1041 and slit 1044, it has a more suitable displacement smoothness during operation, and at the same time, the contact structure ( 11) and the other corresponding contacts in the relay can be improved to improve the pressing force, and conversely, in this way, the number of endurance of the contact switch can be increased. In addition, in consideration of the requirements of each item during actual operation, the present invention proposes a detailed installation aspect on the fourth plate body 104 also for a plurality of the slits 1044, and based on this, the fourth plate body ( 104), in addition to being able to effectively achieve the above-described effects, may also combine its own rigidity with a required elastic change.

1: Contact elastic plate structure
10: elastic plate assembly
101: first plate body 1011: first convex arc refracting part
1012: first attachment hole 1013: first assembly hole
102: second plate body 1021: second convex arc refracting part
1022: second attachment hole 1023: second assembly hole
103: third plate body 1031: third attachment hole
1032: third assembly hole
104: fourth plate body 1041: fixed section
1042: elastic section 1043: fourth attachment hole
1044: slit
11: Contact structure
20: rotating bridge
201: first rotation plate 202: second rotation plate
21: fixed contact plate
22: extension arm
A: Conventional elastic plate structure
B: fixed contact
C: contact on conventional elastic plate structure

Claims (10)

A contact resilient plate structure of an electromagnetic relay having at least one resilient plate assembly and at least one contact structure, the contact resilient plate structure comprising:
The elastic plate assembly includes a first plate body, a second plate body stacked under the first plate body and fixed to the first plate body at the same time, and a lower side of the second plate body. a third plate body that is mutually fixed to the second plate body while being stacked, and a fourth plate body that is stacked on a lower side of the third plate body,
A first attachment hole is drilled in one end of the first plate body having a first convex arc refracting portion,
A second attachment hole corresponding to the first attachment hole is drilled in one end of the second plate body having a second convex arc refracting part, and is installed below the first convex arc refracting part and the first convex arc refracting part wherein the second convex arc refracting part has a gap between each other,
a third attachment hole corresponding to the second attachment hole is drilled in one end of the third plate body;
The fourth plate body has a fixing section that is mutually fixed to the third plate body, and an elastic section that is not mutually fixed with the third plate body, and a fourth attachment to the fixing section corresponding to the third attachment hole. A hole is drilled, and a plurality of slits are provided in the fourth plate body,
wherein the contact structure is fixed through the first attachment hole, the second attachment hole, the third attachment hole and the fourth attachment hole;
Contact elastic plate structure of electromagnetic relay. According to claim 1,
A plurality of the slits are in the shape of a long strip, and the extension direction of each of the slits is parallel to each other,
Contact elastic plate structure of electromagnetic relay. 3. The method of claim 2,
A plurality of the slits are provided extending in the direction of the elastic section from the peripheral edge of the fourth attachment hole as a starting point,
Contact elastic plate structure of electromagnetic relay. 4. The method of claim 3,
When the number of the plurality of slits is odd, the open hole area of the slit located at the intermediate position is larger than the open hole area of each of the plurality of slits on both sides,
Contact elastic plate structure of electromagnetic relay. 4. The method of claim 3,
characterized in that the number of the plurality of slits is 5,
Contact elastic plate structure of electromagnetic relay. According to claim 1,
A plurality of the slits are provided radially in the direction of the elastic section with the peripheral edge of the fourth attachment hole as a starting point,
Contact elastic plate structure of electromagnetic relay. According to claim 1,
An end edge of at least one of the slits near the fourth attachment hole has an inclined shape or an arc shape corresponding to a peripheral edge of the fourth attachment hole,
Contact elastic plate structure of electromagnetic relay. 8. The method according to any one of claims 1 to 7,
At least one first assembly hole is provided at the other end of the first plate body opposite to the end at which the first attachment hole is provided, and the other end of the second plate body opposite to the end at which the second attachment hole is provided. at least one second assembling hole is provided in the at least one second assembling hole, and at least one third assembling hole is provided at the other end of the third plate body opposite to the one end provided with the third attaching hole, and the first assembling hole; The second assembling hole and the third assembling hole are characterized in that they are in communication with each other,
Contact elastic plate structure of electromagnetic relay. 9. The method of claim 8,
The number of the elastic plate assemblies is two, and the two elastic plate assemblies are provided in parallel and in parallel with an interval, and at the same time, the other ends of the two elastic plate assemblies that are not provided with the contact structure are fixed to each other. characterized by being
Contact elastic plate structure of electromagnetic relay. 10. The method of claim 9,
One side of one end of the elastic plate assembly on which the contact structure is provided is characterized in that it forms a step shape that is gradually enlarged,
Contact elastic plate structure of electromagnetic relay.

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