Plugin relay

Abstract

In electromagnetic relays with limited space, a special combination of structures enables a larger contact spacing, providing a plug-in relay suitable for high voltage and harsh environments. [Solution] The plug-in relay has a base 10, an outer cover 11, a coil wheel 12, an iron core 13, enameled wire 14, a support frame 15, a magnetic pole 16, a spring plate 17, a insertion piece 18, a common terminal 19, an intermediate spring plate 20, and two normally open terminals 21. The magnetic pole 16 rotates and swings relative to the support frame 15, one end of the intermediate spring plate 20 is fixed to the common terminal 19, and the other end passes through while making movable contact with the insertion piece 18. The intermediate spring plate 20 has two movable contacts 201, and the two normally open terminals 21 each have a fixed contact, with each fixed contact installed corresponding to the position of each movable contact 201. By utilizing two sets of switching structures on the same circuit, the conductivity interval can be doubled, improving adaptability to high voltage and harsh environments.

Description

Technical Field

[0001] The present invention relates to the field of relays, and particularly to a plug-in relay that can significantly improve the applicability under high voltage or harsh environments.

Background Art

[0002] Electromagnetic relays operate based on electromagnetic effects and are widely used in fields such as industrial automation, power systems, and communication equipment. It has excellent isolation and stability, which are particularly important in multi-channel control. When facing frequent switching of large currents, electromagnetic relays can effectively prevent overheating and melting of contacts and ensure the stability and continuous operation of the load. Due to these functions, electromagnetic relays have become an essential core component for power load switching and circuit protection. In addition, due to their simple structural design, cost performance, and strong anti-interference ability, electromagnetic relays also occupy an important position in applications such as switch control and power load management.

[0003] As described above, although electromagnetic relay technology is mature, with the rapid development of modern electronic devices and new energy systems, there is still room for further improvement. In the future, electromagnetic relays need to have a higher tolerance and be able to handle higher power and larger current loads in order to meet increasing technical requirements and more stringent application environments. For example, when used in a high voltage environment, if the contact spacing of the electromagnetic relay is insufficient, it may not be able to maintain normal operation. Since the contact spacing of conventional electromagnetic relays is limited by the space inside the housing, in order to achieve a larger volume within the framework and improve applicability, it is necessary to improve the contact spacing.

[0004] In view of the above, the inventor has accumulated rich experience and expertise in the related industrial technology field over many years, and proposed a new type of electromagnetic relay technology solution to solve the defects of the above-mentioned existing technologies.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The aforementioned prior art requires greater tolerance and the ability to handle higher power and larger current loads to meet increasing technical requirements and more demanding application environments. For example, when used in high-voltage environments, insufficient contact spacing in electromagnetic relays may prevent them from maintaining normal operation. Conventional electromagnetic relay contact spacing is limited by the space available in the internal housing; therefore, improving the contact spacing is necessary to achieve greater volume within the framework and improve applicability. [Means for solving the problem]

[0006] This invention relates to a plug-in relay suitable for high voltage and harsh environments, which achieves a larger contact spacing through a special combination of structural relationships in an electromagnetic relay with limited space.

[0007] The plug-in relay according to the present invention comprises a base, an outer cover, a coil wheel, an iron core, enameled wire, a support frame, magnetic poles, a spring plate, a slit, a common terminal, an intermediate spring plate, and two normally open terminals. The outer cover covers the base, forming a housing space between the base and the outer cover. The coil wheel is installed on the base and has a housing groove and a plurality of coil wheel terminals, some of which are installed penetrating the base. The iron core is installed in the housing groove. The enameled wire is wound around the outer surface of the coil wheel, thereby enclosing the iron core inside. The enameled wire is electrically connected to the plurality of coil wheel terminals. The support frame is installed on the base and positioned on one side of the coil wheel. The magnetic pole is an L-shaped component comprising a first stage and a second stage, the first stage being installed on one side of the iron core, and an opening provided in the second stage. The spring plate has a bent portion and a fixed portion. The bending portion passes through the opening of the magnetic pole and is in close contact with the magnetic pole, the fixing portion is fixed to the support frame, when the multiple coil wheel terminals are energized, the first stage portion of the magnetic pole is attracted to the iron core by magnetic force, when the coil wheel terminals are de-energized, the first stage portion returns to its original position by the elasticity of the spring plate, the magnetic pole rotates around the support frame as an axis, the insertion piece is fixed to the second stage portion of the magnetic pole, and the common terminal is fixedly installed within the housing space. Furthermore, one end of the intermediate spring plate is fixed to the common terminal, and the other end passes through the insertion piece while making movable contact with it. The intermediate spring plate has two movable contacts, and the two normally open terminals are fixed to and pass through the base, each having a fixed contact, and each of the fixed contacts is positioned in a position corresponding to each of the movable contacts. In this way, by utilizing two sets of opening and closing structures on the same circuit, the conductivity gap can be doubled, improving adaptability to high voltages and harsh environments.

[0008] Preferably, the plug-in relay according to the present invention further includes a pair of mounting parts, which are installed on the base and arranged within the housing space, and the pair of mounting parts are fixedly connected to both ends of the common terminal, and each of the pair of mounting parts is provided with a mounting groove, and the two ends of the common terminal are housed and mounted across it, and the pair of mounting parts and the common terminal as a whole form a gate frame structure, so that the intermediate spring plate is housed while swinging within the gate frame structure, thereby increasing the distance between the movable contact and the fixed contact when they are disconnected.

[0009] Preferably, the common terminal has a first side and a second side, the first side is adjacent to one side of the support frame and the second side is located on the opposite side of the first side, and the intermediate spring plate is attached to the first side of the common terminal with rivets, thereby increasing the vertical distance (length of the force arm) from the line of action of the force acting on the intermediate spring plate to the fixed fulcrum.

[0010] Preferably, the intermediate spring plate extends upward from the position where it is riveted to the common terminal, extends downward once on the second side over the common terminal, extends in the direction of the support frame, and finally the end portion extends downward in the direction of the base, and the movable contact is installed at the end portion of the intermediate spring plate, thereby further increasing the distance between the movable contact and the fixed contact when they are disconnected.

[0011] Preferably, the plug-in relay according to the present invention further has a contact plate fixed to the end portion of the intermediate spring plate, and the movable contact penetrates the contact plate, thereby increasing the contact force and improving heat dissipation.

[0012] Preferably, the plug-in relay according to the present invention further has a pair of current sensors, each fixed to the normally open terminal outside the housing space, thereby allowing monitoring of the usage status of the plug-in relay.

[0013] Preferably, to enhance applicability, the intermediate spring plate is composed of multiple laminated metal pieces, and the multiple laminated metal pieces can be made of different materials depending on the application.

[0014] In summary, the plug-in relay according to the present invention utilizes two sets of switching structures on the same circuit to double the contact spacing, thereby improving adaptability to high voltages and harsh environments. Furthermore, based on this foundation, the pair of mounting parts and the common terminal together form the gate frame structure, and as a result, the intermediate spring plate is housed while swinging within the gate frame structure, thereby further increasing the spacing between the movable contact and the fixed contact when disconnected. In addition, the intermediate spring plate is attached to a specific position on the common terminal, thereby further improving the stability of the contact state and disconnection state between the contacts. Furthermore, by utilizing a special curved installation of the intermediate spring plate, the spacing between the movable contact and the fixed contact when disconnected can be further increased. On the other hand, considering the overall stability and service life of the plug-in relay, the contact force can be increased and heat dissipation can be improved by adding contact plates, and the operating state can be monitored using a current sensor. At the same time, the intermediate spring plate is composed of multiple laminated metal pieces, and the applicability can be increased by selecting different materials for these laminated metal pieces. [Brief explanation of the drawing]

[0015] [Figure 1] This is a schematic diagram of a plug-in relay structure according to one embodiment of the present invention. [Figure 2] This is a schematic assembly diagram of a plug-in relay according to one embodiment of the present invention. [Figure 3] This is a schematic diagram showing the disconnected state of a plug-in relay according to one embodiment of the present invention. [Figure 4] This is a schematic diagram showing the conductivity state of a plug-in relay according to one embodiment of the present invention. [Figure 5] This is a schematic diagram of a structure in which an intermediate spring plate according to one embodiment of the present invention is composed of a plurality of laminated metal pieces. [Figure 6] This is a schematic diagram of a current sensor added to a plug-in relay according to one embodiment of the present invention. [Modes for carrying out the invention]

[0016] (One embodiment) The following description and diagrams are provided together so that the contents of the present invention can be clearly understood by those who have ordinary skill in the art.

[0017] As shown in Figures 1 to 4, which are schematic diagrams of a plug-in relay structure according to one embodiment of the present invention, an assembly schematic diagram, a schematic diagram of the cut state, and a schematic diagram of the conductive state, the plug-in relay according to the present invention has a base 10, an outer cover 11, a coil wheel 12, an iron core 13, enameled wire 14, a support frame 15, a magnetic pole 16, a spring plate 17, a insertion piece 18, a common terminal 19, an intermediate spring plate 20, and two normally open terminals 21.

[0018] The outer cover 11 covers the base 10, forming a housing space 111 between the base 10 and the outer cover 11, thereby housing many of the components of the plug-in relay. Furthermore, the coil wheel 12 is installed on one side of the base 10 and is equipped with a housing groove 121 and multiple coil wheel terminals 122, each coil wheel terminal 122 being installed with a portion penetrating the base 10. The iron core 13 is installed in the housing groove 121. The enameled wire 14 is wrapped around the outer surface of the coil wheel 122, thereby enclosing the iron core 13, and the enameled wire 14 is electrically connected to each coil wheel terminal 122. As a result, after electrical conduction, the iron core 13 forms a magnetic field line distribution for electromagnetic induction. The support frame 15 is installed on the base 10 and is positioned on one side of the coil wheel 12. The magnetic pole 16 is an L-shaped component comprising a first stage 161 and a second stage 162. The first stage 161 is installed on one side of the iron core 13, and the second stage 162 has an opening 1621. The spring plate 17 has a bent portion 171 and a fixed portion 172. The bent portion 171 passes through the opening 1621 of the magnetic pole 16 and is in close contact with the magnetic pole 16, and the fixed portion 172 is fixed to the support frame 15. During operation, when each coil wheel terminal 122 is energized, the first stage 161 of the magnetic pole 16 is attracted to the iron core 13 by magnetic force. When the energization of the coil wheel terminal 122 is stopped, the first stage 161 returns to its original position by the elasticity of the spring plate 17, and the magnetic pole 16 rotates around the support frame 15 as an axis. The insertion piece 18 is fixed to the second stage portion 162 of the magnetic pole 16, so that when the magnetic pole 16 rotates and swings, the insertion piece 16 is driven away from the support frame 15. Furthermore, the common terminal 19 is fixedly installed in the housing space 111, and the intermediate spring plates 20 are fixed and connected at one end to the other, with the other end of the intermediate spring plate 20 passing through while making movable contact with the insertion piece 18. Moreover, the intermediate spring plate 20 has two movable contacts 201. Each normally open terminal 21 is fixed to and passes through the base 10, and each normally open terminal 21 has a fixed contact 211, and each fixed contact 211 is positioned in a position corresponding to each movable contact 201. That is, after the magnetic pole 16 is energized, the first stage 161 is attracted to the iron core 13 by magnetic force, forming a pivotal motion as a whole. At this time, the second stage 162 moves the insertion piece 16 accordingly, and further pushes and moves the intermediate spring plate 20.At this time, each movable contact 201 contacts the corresponding fixed contact 211 respectively, forming an electrically conductive state. In this way, the plug-in relay can utilize two sets of opening and closing structures for the same circuit in a limited accommodation space 111, doubling the conduction interval and improving the adaptability to high voltages and harsh environments.

[0019] Subsequently, the above-mentioned plug-in relay realizes doubling the conduction interval through two sets of opening and closing structures, and the present invention also includes an improvement method for expanding the distance layer between contacts (the distance H between contacts shown in FIG. 3). The plug-in relay further includes a pair of mounting parts 22, which are installed on the pedestal 10, arranged in the accommodation space 111, and both ends of the pair of mounting parts are fixedly connected to both ends of the common terminal 19 respectively.

[0020] Furthermore, each of the pair of mounting parts 22 has a mounting groove 221, and both ends of the common terminal 19 are accommodated and mounted in a straddling manner. By forming a portal frame structure 222 as a whole with the pair of mounting parts 22 and the common terminal 19, the intermediate spring plate 20 is accommodated while swinging within the portal frame structure 222.

[0021] Conventionally, due to the limited accommodation space 111, the swinging range of the intermediate spring plate 20 was generally restricted by the arrangement conditions of other components. However, due to the special design of the portal frame structure 222, it is possible to expand the swinging range of the intermediate spring plate 20 within the limited space. As a result, the distance between contacts can be increased.

[0022] Furthermore, in order to improve the stability of the contact state and the open state between contacts, the plug-in relay according to the present invention attempts to increase the perpendicular distance (the length of the force arm) from the action line of the force received by the intermediate spring plate 20 to the fixed fulcrum. As a realization method, a special fixed connection relationship between the intermediate spring plate 20 and the common terminal 19 is utilized. The common terminal has a first side surface 191 and a second side surface 192. The first side surface 191 is adjacent to one side of the support frame 15, and the second side surface 192 is located on the opposite side of the first side surface 191. The intermediate spring plate 20 is attached to the position of the first side surface 191 of the common terminal 19 with a rivet to achieve the above-mentioned effect.

[0023] Also, in the present invention, in order to improve the distance layer between contacts, in addition to the method of accommodating the intermediate spring plate 20 using the above-mentioned door frame structure 222, by making the intermediate spring plate 20 itself have a special bending structure, the interval between the movable contact 201 and the fixed contact 211 when in the disconnected state can be further enlarged. Specifically, the intermediate spring plate 20 extends upward from the position riveted to the common terminal 19, extends downward once on the second side surface 192 across the common terminal 19, then extends in the direction of the support frame 15, and finally the end portion extends downward in the direction of the pedestal 10. The movable contact 201 is installed at the end portion of the intermediate spring plate 20, and thus the above-mentioned expected effect can be achieved.

[0024] Please refer to FIGS. 1-6. Since FIGS. 1-4 have already been described, they will not be repeated here. FIG. 5 is a schematic diagram of the structure in which the intermediate spring plate in the best embodiment of the present invention is composed of a plurality of laminated metal pieces, and FIG. 6 is a schematic diagram of the current sensor added to the plug-in relay in the best embodiment of the present invention. Based on the structure of the above-mentioned embodiment, in order to improve the overall stability and service life of the plug-in relay, the plug-in relay further has a contact plate 23, which is fixed to the end portion of the intermediate spring plate 20. The movable contact 201 penetrates the contact plate 23, thereby increasing the contact force and improving the heat dissipation performance. Furthermore, the plug-in relay according to the present invention further has a pair of current sensors 24, which are respectively fixed to each normally open terminal 21 outside the accommodation space 111, thereby monitoring the usage state and evaluating its tolerance ability. In different application situations, the requirements for the voltage and current tolerance performance may be different. Therefore, in the plug-in relay according to the present invention, in order to enhance the applicability of the intermediate spring plate 20, it is composed of a plurality of laminated metal pieces, and each laminated metal piece can select different materials according to the application situation.

[0025] In summary, the plug-in relay of the present invention utilizes two sets of switching structures on the same circuit, thereby doubling the contact spacing and improving adaptability to high voltages and harsh environments. Based on this, by utilizing a gate frame structure jointly formed by the mounting section and common terminal, the intermediate spring plate swings flexibly and is housed within the gate frame structure. As a result, the spacing between the movable and fixed contacts in the disconnected state is effectively increased, improving the safety and reliability of the disconnection process. Furthermore, by attaching the intermediate spring plate to a specific position on the common terminal, the point of force is reinforced, ensuring contact between the contacts and stability in the disconnected state. In addition, the special bending design of the intermediate spring plate further increases the spacing between the movable and fixed contacts in the disconnected state, enhancing safety during disconnection. At the same time, to improve the overall stability of the plug-in relay and extend its service life, contact pressure can be strengthened and heat dissipation can be enhanced by adding contact plates. Furthermore, by installing a current sensor, the operating status can be monitored in real time, ensuring operational stability and safety. Furthermore, the intermediate spring plate is composed of multiple layered metal pieces, and since these metal pieces can be made of different materials, the relay can be adapted to a variety of applications and ensures stable operation under various operating conditions. [Explanation of Symbols]

[0026] 10 bases, 11. Outer cover, 111 storage spaces, 12 coil wheels, 121 Storage groove, 122 Coil wheel terminals, 13 Iron Heart, 14 Enamel wire, 15 support slots, 16 magnetic poles, 161 First part, 162 Second stage, 1621 aperture, 17 Spring plate, 171 Bent section, 172 fixed parts, 18 cuttings, 19 Common terminals, 191 First aspect, 192 Second aspect, 20 Intermediate spring plates, 201 Movable contacts, 21 normally open terminal, 22 Mounting part, 221 Mounting groove, 222 Gate frame structure, 23 contact plate, 24 Current sensors, H: Distance between contact points.

Claims

1. A plug-in relay comprising a base, outer cover, coil wheel, iron core, enameled wire, support frame, magnetic pole, spring plate, insert, common terminal, intermediate spring plate, and two normally open terminals, The outer cover covers the base, and a storage space is formed between the base and the outer cover. The coil wheel is mounted on the base, and the coil wheel is equipped with a housing groove and a plurality of coil wheel terminals, and a portion of the plurality of coil wheel terminals are installed penetrating the base. The iron core is installed in the housing groove, The enameled wire is wound around the outer surface of the coil wheel, thereby enclosing the iron core inside, and the enameled wire is electrically connected to the multiple coil wheel terminals. The support frame is installed on the base and positioned on one side of the coil wheel. The magnetic pole is an L-shaped component comprising a first stage and a second stage, the first stage being installed on one side of the iron core, and the second stage having an opening. The spring plate has a bent portion and a fixed portion, the bent portion passes through the opening of the magnetic pole and is in close contact with the magnetic pole, the fixed portion is fixed to the support frame, when the plurality of coil wheel terminals are energized, the first stage portion of the magnetic pole is attracted to the iron core by magnetic force, when the energization of the coil wheel terminals is stopped, the first stage portion returns to its original position by the elasticity of the spring plate, and the magnetic pole rotates around the support frame as an axis, The aforementioned insertion piece is fixed to the second stage portion of the magnetic pole, The aforementioned common terminal is fixedly installed within the aforementioned housing space. The intermediate spring plate has one end fixed to the common terminal and the other end passing through the insertion piece while making movable contact with it, and the intermediate spring plate has two movable contacts. A plug-in relay characterized in that the two normally open terminals are fixed to and pass through the base, each having a fixed contact, and each of the fixed contacts is positioned in a position corresponding to each of the movable contacts.

2. The plug-in relay according to claim 1, further comprising a pair of mounting parts, mounted on the base, and arranged within the housing space, wherein the pair of mounting parts are fixedly connected to both ends of the common terminal.

3. The plug-in relay according to claim 2, characterized in that each of the pair of mounting portions is provided with a mounting groove, and both ends of the common terminal are housed and mounted across it, and the pair of mounting portions and the common terminal as a whole form a gate frame structure, so that the intermediate spring plate is housed while swinging within the gate frame structure.

4. The plug-in relay according to claim 3, characterized in that the common terminal has a first side and a second side, the first side is adjacent to one side of the support frame, the second side is located on the opposite side of the first side, and the intermediate spring plate is attached to the first side of the common terminal with a rivet.

5. The plug-in relay according to claim 4, characterized in that the intermediate spring plate extends upward from the position where it is riveted to the common terminal, extends downward once on the second side over the common terminal, extends in the direction of the support frame, and finally its end portion extends downward in the direction of the base, and the movable contact is installed at the end portion of the intermediate spring plate.

6. The plug-in relay according to claim 5, further comprising a contact plate fixed to the end portion of the intermediate spring plate, wherein each of the movable contacts is installed penetrating the contact plate.

7. The plug-in relay according to claim 6, further comprising a pair of current sensors, each fixed to the normally open terminals outside the housing space.

8. The plug-in relay according to claim 7, characterized in that the intermediate spring plate is composed of a plurality of layered metal pieces.

9. The plug-in relay according to claim 8, characterized in that the layered metal pieces are made of different materials.

Images