Non-polar clapper type electromagnetic relay

Abstract

The invention provides a non-polar clapper type electromagnetic relay, which can be connected with any two electrodes for electrical conduction to execute charging or discharging operation without considering positive and negative polarities, and is provided with a base, an electromagnetic coil group, a connecting assembly, a fixed contact assembly and a movable contact assembly, the connecting assembly is arranged on one side of the electromagnetic coil and acts in response to the driving state of the electromagnetic coil, the fixed contact assembly and the movable contact assembly are correspondingly arranged, and the movable contact assembly is linked by the connecting assembly to be in contact with or separated from the fixed contact assembly; the blocking block is located between two fixed conducting strips which are symmetrically arranged in the fixed contact assembly, a movable elastic piece of the movable contact assembly is arranged on the blocking block in a striding mode, so that movable contact stroke actions on the movable elastic piece are both arranged on the two sides of the blocking block, and an arc striking magnet is arranged in the blocking block. Based on the above conditions, the clapper-type electromagnetic relay can realize a non-polar effect, thereby improving variability and safety in application.

Description

Technical Field

[0001] The present invention relates to the field of electromagnetic relays, and in particular to a non-polarity snap-action electromagnetic relay which utilizes special structural features to realize a snap-action relay type in which two electrodes can be arbitrarily connected for electrical conduction to perform charging or discharging operations without considering positive or negative polarity. Background Art

[0002] Electromagnetic relays are currently a very common electronic switch product, and their technology has also been quite mature. Depending on different electrical applications, installation and setting environment conditions, etc., related manufacturers need to make corresponding changes to the structure of electromagnetic relays to provide products that meet the needs.

[0003] When electromagnetic relays are installed in electronic products or circuit systems today, they must strictly follow the positive and negative polarity connection method, that is, when the electromagnetic relay is manufactured, each pin is predetermined to be connected to the positive or negative pole in the electronic circuit. When the electromagnetic relay is assembled inside, the positive and negative pins must be connected to the positive and negative poles of the electronic circuit in the correct manner according to the markings on the electromagnetic relay. In this case, once the electronic circuit generates reverse electrical conduction, the electromagnetic relay will generate a large arc effect, causing the electromagnetic relay to be damaged by the arc energy and then destroyed. Therefore, current electromagnetic relays must be connected to the positive and negative electrodes of the electronic circuit according to the positive and negative polarity instructions. It is not allowed to assemble with reverse positive and negative poles or operate the electronic circuit with reverse electrical conduction.

[0004] However, with the advancement of various industries, electrical products are more often used in reverse electrical conduction due to their usage needs. For example, when there is a need for power recharging or an abnormality occurs during operation, the electronic circuit will operate in a reverse electrical conduction state at different time points. Common application areas are the main electronic switches in electric vehicles and the electronic switches in solar energy storage systems. Therefore, for the development of electromagnetic relays, how to allow the electromagnetic relay to carry variable positive and negative current inputs must also be taken into design considerations to provide electronic relay products suitable for the above application scenarios.

[0005] In view of this, the inventors, drawing on their rich experience in related industries over many years, conceived and proposed a non-polarity snap-on electromagnetic relay, hoping to solve the above-mentioned shortcomings and effectively improve the dilemma that electromagnetic relays cannot allow reverse electrical conduction, thereby achieving the goal of non-polarity application. Summary of the invention

[0006] One purpose of the present invention is to provide a non-polarity clap-type electromagnetic relay, which, through specific structural conditions, can achieve the function of arbitrarily connecting two electrodes for electrical conduction to perform charging or discharging operations without considering the positive and negative polarities, thereby effectively improving the application scope and applicability of the clap-type relay.

[0007] To achieve the above-mentioned purpose, the present invention provides a non-polarity snap-on electromagnetic relay, which can arbitrarily connect two electrodes for electrical conduction to perform charging or discharging operations without considering the positive and negative polarities. The non-polarity snap-on electromagnetic relay has a base, an electromagnetic coil group, a connecting component, a fixed contact component and a movable contact component. The electromagnetic coil group, the connecting component, the fixed contact component and the movable contact component are respectively arranged on the base; the connecting component is arranged on one side of the electromagnetic coil group to be actuated according to the driving state of the electromagnetic coil group. The non-polarity snap-on electromagnetic relay is characterized in that: the fixed contact component has two fixed conductive sheets, a first fixed contact and a second fixed contact, the two fixed conductive sheets are symmetrically arranged and one end of each of them extends outside the base, the first fixed contact is arranged on any one of the fixed conductive sheets, and the second fixed contact is arranged on the other fixed conductive sheet. Conductive sheet; the movable contact assembly has a movable spring sheet, a first movable contact and a second movable contact, the movable spring sheet has a gap formed by an end portion thereof extending inwardly, the first movable contact and the second movable contact are respectively arranged on the movable spring sheet and are located on both sides of the gap and correspond to the first fixed contact and the second fixed contact, the movable spring sheet has a connecting section at the opposite end where the first movable contact and the second movable contact are arranged, the connecting section is linked by the connecting assembly, thereby allowing the first movable contact and the second movable contact to contact or separate from the first fixed contact and the second fixed contact; the base also has a blocking block, the blocking block is located between the two fixed conductive sheets, and the movable spring sheet is arranged across the blocking block so that the travel actuation of the first movable contact and the second movable contact are both placed on both sides of the blocking block, wherein the blocking block has an arc-striking magnet.

[0008] Preferably, the arc-striking magnet has relative north and south poles. When current flows from the first movable contact toward the first fixed contact, and the first fixed contact and the first movable contact are close to the north pole of the arc-striking magnet and away from the magnetic field of the south pole of the arc-striking magnet, or when current flows from the first fixed contact toward the first movable contact, and the first fixed contact and the first movable contact are close to the south pole of the arc-striking magnet and away from the magnetic field of the north pole of the arc-striking magnet, the arc-striking magnet guides the arc to stretch the arc toward the movable spring. Alternatively, the arc-striking magnet has relative north and south poles, and when current flows from the second movable contact toward the second fixed contact and the second fixed contact and the second movable contact are close to the south pole of the arc-striking magnet and away from the magnetic field of the north pole of the arc-striking magnet, or when current flows from the second fixed contact toward the second movable contact and the second fixed contact and the second movable contact are close to the north pole of the arc-striking magnet and away from the magnetic field of the south pole of the arc-striking magnet, the arc-striking magnet guides the arc to stretch the arc toward the movable spring.

[0009] Preferably, the movable spring has an arc connecting portion, which includes the connecting section and two symmetrically arranged discharge sections. When the movable contacts on the left and right sides separate the fixed contacts, the air around the discharge section forms a higher electric field and is ionized due to the arc conduction. The ionized air is conductive and causes a discharge phenomenon around the two discharge sections to attract the arc. The arc is guided by the arc-starting magnet to stretch the arc toward the arc connecting portion to reduce the arc energy density, and then the stretched arc is attracted by the two discharge sections on the arc connecting portion, so that the arc connecting portion receives the arc energy and the arc can be extinguished. Another purpose that can be achieved by the present invention is that lightning is essentially a kind of electric arc, and the discharge effect at the tip of a lightning conductor is used to attract lightning strikes to prevent surrounding objects from being damaged by lightning. The present invention guides the arc toward the arc connecting portion through the arc-starting magnet to reduce the arc energy density by stretching the arc, and then attracts the stretched arc through the two discharge sections on the arc connecting portion, so that the arc connecting portion receives the arc energy (such as heat energy) and extinguishes the arc, thereby preventing surrounding objects in the relay from being damaged by the arc.

[0010] Preferably, the base also has two magnetic element assembly parts, which are symmetrically arranged with the blocking block as the center and are located on opposite sides of the first fixed contact and the second fixed contact. Each of the magnetic element assembly parts has a magnet, wherein the magnet is arranged in the same state as the setting direction of the magnetic pole of the arc-striking magnet, so as to enhance the magnetic force strength and stabilize the overall magnetic field performance.

[0011] Preferably, the barrier block also has a double-sided energy absorption portion, which includes a first absorption surface and a second absorption surface. The first absorption surface and the second absorption surface are relatively arranged to absorb arc heat energy respectively, and the first absorption surface and the second absorption surface are non-magnetic polymers to enhance the blocking and elimination performance of the arc.

[0012] Preferably, the blocking block has a base and a protrusion, the protrusion is roughly L-shaped and is protruding from the front and top sides of the base, the thickness of the protrusion is smaller than the base, and the arc-striking magnet is located on the bottom surface of the base, wherein the minimum vertical distance between the edges of the two movable contacts and the two fixed contacts and the arc-striking magnet is 3 to 11 mm, thereby achieving a better arc extinguishing effect.

[0013] In addition, in practical application, a specific structure is to make the minimum distance D1 between the center of the first fixed contact and the second fixed contact and the blocking block 1-10 mm, and the minimum distance D2 between the center of the first fixed contact and the second fixed contact and the base 2.9-15 mm.

[0014] A preferred example of the connection assembly includes a bracket, an elastic member, a magnetic member and a fixing member, wherein the bracket is connected to the electromagnetic coil group, one end of the elastic member is fixed to the bracket, and the other end is fixed to the magnetic member, the fixing member is arranged on the magnetic member, and the connection section of the movable spring is arranged on the fixing member; when the electromagnetic coil group generates magnetic force, the magnetic member is attracted by the electromagnetic coil group and drives the fixing member, so that the two movable contacts contact the two fixed contacts, and at the same time, a force is applied to the elastic member; when the electromagnetic coil group does not generate magnetic force, the magnetic member and the fixing member are reset by the force of the elastic member, so that the first movable contact and the second movable contact are separated from the first fixed contact and the second fixed contact. Preferably, the elastic member is a spring.

[0015] In summary, the non-polarity clap-type electromagnetic relay of the present invention is a specific structural feature that enables the clap-type electromagnetic relay to be electrically connected to the two electrodes of the electronic circuit regardless of the positive and negative polarities, and to perform charging or discharging operations. In this way, the non-polarity clap-type electromagnetic relay can effectively avoid the arc effect generated when the current is reversely conducted and damage the relay, thereby greatly improving the safety and service life of the product. Furthermore, the present invention also provides many specific detailed technical features that can be attached to the non-polarity clap-type electromagnetic relay, as shown in the above paragraphs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A This is a three-dimensional partial exploded schematic diagram of a non-polarity snap-on electromagnetic relay according to a preferred embodiment of the present invention (I).

[0017] Figure 1B This is a three-dimensional partially exploded schematic diagram of a non-polarity snap-on electromagnetic relay according to a preferred embodiment of the present invention (II).

[0018] Figure 1C Schematic diagram (I) of the three-dimensional perspective of the application state of the non-polarity snap-on electromagnetic relay according to the preferred embodiment of the present invention.

[0019] Figure 1D This is a three-dimensional perspective schematic diagram (II) of the application state of the polarity-free snap-on electromagnetic relay of a preferred embodiment of the present invention.

[0020] Figure 2A It is a three-dimensional schematic diagram of the base structure of a preferred embodiment of the present invention.

[0021] Figure 2B It is a side view of the base structure of a preferred embodiment of the present invention.

[0022] Figure 3 It is a partial cross-sectional view of the structure of the base and the fixed contact assembly of a preferred embodiment of the present invention.

[0023] Figure 4 This is a schematic side view of the three-dimensional assembly of a non-polarity snap-on electromagnetic relay according to a preferred embodiment of the present invention.

[0024] Figure 5A Schematic diagram (I) of the actuation and application of the non-polarity snap-on electromagnetic relay according to a preferred embodiment of the present invention.

[0025] Figure 5B This is a schematic diagram (II) of the actuation and application of the polarity-free snap-on electromagnetic relay according to a preferred embodiment of the present invention.

[0026] Fig. 6A Schematic diagram (III) of the operation and application of the non-polarity snap-on electromagnetic relay according to the preferred embodiment of the present invention.

[0027] Figure 6B Schematic diagram (IV) of the actuation application of the polarity-free snap-on electromagnetic relay according to the preferred embodiment of the present invention.

[0028] Figure 7 This is a partially exploded schematic diagram of a non-polarity snap-on electromagnetic relay having two magnetic element assemblies according to a preferred embodiment of the present invention.

[0029] Fig. 8A The schematic diagram (1) of the structure of the non-polarity snap-on electromagnetic relay having two magnetic element assemblies is shown in the preferred embodiment of the present invention.

[0030] Figure 8B This is a structural schematic diagram (II) of a non-polarity snap-on electromagnetic relay having two magnetic element assemblies in a preferred embodiment of the present invention.

[0031] Explanation of the reference numerals: 1-polarity-free snap-on electromagnetic relay; 10-base; 101-magnetic element assembly; 1011-assembly slot; 102-magnet; 11-electromagnetic coil assembly; 12-connection assembly; 121-bracket; 122-elastic member; 123-magnetic attraction member; 124-fixing member; 13-fixed contact assembly; 131-fixed conductive sheet; 1321-first fixed contact; 1322-second fixed contact; 14-movable contact assembly; 141-movable spring sheet; 1410-arc connection portion; 1411-connection section; 1412-discharge section; 1421-first movable contact; 1422-second movable contact; 15-arc-striking magnet ;16-blocking block;160-double-sided energy absorption part;1601-first absorption surface;1602-second absorption surface;161-accommodation groove;162-base;163-protrusion;164-extension part;A-minimum vertical distance between the edge of the fixed contact and the arc-striking magnet;T1-maximum thickness of the blocking block;H1-maximum height of the blocking block;L1-maximum length of the blocking block;D1-minimum distance between the edge of the first fixed contact and the second fixed contact and the blocking block;D2-minimum distance between the edge of the first fixed contact and the second fixed contact and the base;T2-thickness of the protrusion;H2-protrusion height of the protrusion on the top side of the base;L2-length of the protrusion. DETAILED DESCRIPTION

[0032] In order to enable a person having ordinary knowledge in the art to clearly understand the contents of the present invention, the following description is provided with reference to the drawings.

[0033] Traditional clap-type electromagnetic relays are limited by their structural design, so their arc blowing or arc extinguishing structures can only eliminate arcs generated by a single current conduction direction. However, under the current charging application requirements of electric vehicles or solar power systems, existing clap-type electromagnetic relays, once encountering reverse current conduction operations, will inevitably burn or even explode due to the arc generated by the actuation. In order to address the shortcomings of existing clap-type electromagnetic relays and meet the needs of actual application products, the inventor conceived of using specific structural conditions to allow the clap-type electromagnetic relay to effectively eliminate arc energy under both forward and reverse current conduction operations, achieving a non-polarity application in which the two electrodes can be arbitrarily connected for electrical conduction to perform charging or discharging operations without considering the positive and negative polarities. The following is an explanation of the specific technical features of the non-polarity clap-type electromagnetic relay proposed in the present invention.

[0034] See also Figure 1A to Figure 8B, which are partial exploded 3D schematic diagrams (I) and (II) of a polarity-free snap-on electromagnetic relay of a preferred embodiment of the present invention, three-dimensional perspective schematic diagrams (I) and (II), a three-dimensional schematic diagram and a side view of a base structure, a partial cross-sectional view of a structure of a base and a fixed contact assembly, a three-dimensional assembly side schematic diagram of a polarity-free snap-on electromagnetic relay, an actuation application schematic diagram (I) to (IV), a partial exploded schematic diagram of a part having two magnetic element assemblies, and a structural schematic diagram of a part having two magnetic element assemblies (I) and (II). The polarity-free snap-on electromagnetic relay 1 of the present invention can arbitrarily connect two electrodes for electrical conduction to perform charging or discharging operations without considering the positive and negative polarities. The polarity-free snap-on electromagnetic relay 1 comprises a base 10, an electromagnetic coil assembly 11, a connecting assembly 12, a fixed contact assembly 13 and a movable contact assembly 14. The electromagnetic coil assembly 11, the connecting assembly 12, the fixed contact assembly 13 and the movable contact assembly 14 are respectively arranged on the base 10; the connecting assembly 12 is arranged on one side of the electromagnetic coil assembly 11 to be actuated according to the driving state of the electromagnetic coil assembly 11. The polarity-free snap-on electromagnetic relay 1 is characterized in that the fixed contact assembly 13 has two fixed conductive sheets 131, a first fixed contact 1321 and a second fixed contact 1322, the two fixed conductive sheets 131 are symmetrically arranged and one end of each extends to the outside of the base 10, the first fixed contact 1321 and the second fixed contact 1322 are respectively arranged on the fixed conductive sheet 131; the movable contact assembly 14 has a movable spring 141, a first movable contact 1421 and the second movable contact 1422, the movable spring 141 has an inwardly extending space formed by one end thereof The first movable contact 1421 and the second movable contact 1422 are respectively arranged on the movable spring sheet 141 and are located on both sides of the gap and correspond to the first fixed contact 1321 and the second fixed contact 1322. The movable spring sheet 141 has a connecting section 1411 at the opposite end where the first movable contact 1421 and the second movable contact 1422 are arranged. The connecting section 1411 is linked by the connecting component 12, so that the first movable contact 1421 and the second movable contact 1422 are in contact with or separated from the first fixed contact 1321 and the second fixed contact 1322. The base 10 of the non-polarity snap-on electromagnetic relay also has a blocking block 16, which is located between the two fixed conductive sheets 131, and the movable spring 141 is arranged across the blocking block 16 so that the first movable contact 1421 and the second movable contact 1422 are both placed on both sides of the blocking block 16. The blocking block 16 has an arc-starting magnet 15 in it, so as to achieve the arc blowing effect and allow the arc during operation to be affected by the blocking block 16 and the arc-starting magnet 15 to form energy attenuation, further achieving the arc extinguishing effect, which can be referred to Figure 1CAs shown, it can be seen that when the second movable contact 1422 and the second fixed contact 1322 are separated from or in contact with each other, Figure 1C Separated from each other, the arc generated (at Figure 1C The arc is attracted to the blocking block 16 due to the action of the blocking block 16 and the arc-striking magnet 15. At the same time, the arc-striking magnet 15 and the blocking block 16 are formed into a state of a nearly integrated structure through the above-mentioned connection relationship characteristics, which is more conducive to isolating and eliminating the arc. Specifically, the bottom surface of the blocking block 16 may be provided with a receiving groove 161 for the installation of the arc-striking magnet 15. Preferably, the base 10 may have an asymmetric structure, so that the area where the blocking block 16 is provided (that is, the base 10 is at Figure 1A The depth of the front side shown in FIG. 1 is slightly greater than the area where the electromagnetic coil assembly 11 is arranged (i.e., the base 10 is located at Figure 1A The depth of the rear side (as shown) can be reduced by reducing the height of the rear area of ​​the base 10 to better reduce the overall volume of the non-polarity snap-on electromagnetic relay 1.

[0035] Through the above structure, the polarity-free snap-on electromagnetic relay 1 can achieve the effect of "polarity-free". The "polarity-free" mentioned here means that the two electrodes can be arbitrarily connected to perform electrical conduction to perform charging or discharging operations without considering the positive and negative polarities. When the structure of the polarity-free snap-on electromagnetic relay 1 is limited to the above characteristic conditions, the two fixed conductive sheets 131 extending outside the base 10 can be assembled and fixed with the electrodes to be connected at will. Regardless of the conduction direction of the current, the arc generated by the polarity-free snap-on electromagnetic relay 1 during actuation can be smoothly eliminated through the action of the blocking block 16 and the arc-starting magnet 15 therein, effectively changing the unidirectional current application mode of the existing snap-on electromagnetic relay to prevent the arc generated by the reverse conduction of the current from damaging the relay.

[0036] More specifically, Figure 5A and Figure 5B As shown, it indicates that the arc-striking magnet 15 has a relative N pole and S pole. When the current flows from the first movable contact 1421 toward the first fixed contact 1321, and the first fixed contact 1321 and the first movable contact 1421 are close to the N pole of the arc-striking magnet 15 and away from the magnetic field of the S pole of the arc-striking magnet 15, the arc-striking magnet 15 guides the arc to stretch the arc toward the movable spring 141, and then, the current on the other side flows from the second fixed contact 1322 toward the second movable contact 1422, and the second fixed contact 1322 and the second movable contact 1422 are close to the S pole of the arc-striking magnet 15 and away from the magnetic field of the N pole of the arc-striking magnet 15, and the arc-striking magnet 15 stretches the arc so that the arc contacts the base 10 and the arc is extinguished, as shown in FIG. Figure 5AAlternatively, when the current flows from the first fixed contact 1321 toward the first movable contact 1421, and the first fixed contact 1321 and the first movable contact 1421 are close to the S pole of the arc-striking magnet 15 and away from the magnetic field of the N pole of the arc-striking magnet 15, the arc-striking magnet 15 guides the arc to stretch the arc toward the movable spring 141, and then, the other side current flows from the second movable contact 1422 toward the second fixed contact 1322, and the second fixed contact 1322 and the second movable contact 1422 are close to the N pole of the arc-striking magnet 15 and away from the magnetic field of the S pole of the arc-striking magnet 15, the arc-striking magnet 15 stretches the arc so that the arc contacts the base 10 and the arc is extinguished, as shown in FIG. Figure 5B shown.

[0037] Through this structural configuration, the arc can flow as much as possible in the direction of the movable spring piece 141. And through the blocking block 16, the function of preventing the arc from moving in the aforementioned direction can be achieved. The arc is essentially like lightning. If it is not affected by any structure, it will, in principle, be in any radiation state. In order to solve this phenomenon and allow the arc to be effectively extinguished, the polarity-free snap-on electromagnetic relay 1 is a basic structure through the blocking block 16 and the arc-starting magnet 15 disposed therein, which then guides and extinguishes the arc. Furthermore, when the polarity-free snap-on electromagnetic relay 1 is in the above-mentioned configuration, it has the effect of causing the arc to flow toward the movable spring piece 141, and then further extinguishes the arc. At Figure 5A and Figure 5B The N and S indicated in the figure represent the N pole and S pole positions of the arc-striking magnet 15 .

[0038] See also Fig. 6A and Figure 6B As shown, when the current flows from the second movable contact 1422 toward the second fixed contact 1322, and the second fixed contact 1322 and the second movable contact 1422 are close to the S pole of the arc-striking magnet 15 and away from the magnetic field of the N pole of the arc-striking magnet 15, the arc-striking magnet 15 guides the arc to stretch the arc toward the movable spring 141, and then, the current on the other side flows from the first fixed contact 1321 toward the first movable contact 1421, and the first fixed contact 1321 and the first movable contact 1421 are close to the N pole of the arc-striking magnet 15 and away from the magnetic field of the S pole of the arc-striking magnet 15, the arc-striking magnet 15 stretches the arc so that the arc contacts the base 10 and the arc is extinguished, as shown in FIG. Fig. 6AAlternatively, when the current flows from the second fixed contact 1322 toward the second movable contact 1422, and the second fixed contact 1322 and the second movable contact 1422 are close to the N pole of the arc-striking magnet 15 and away from the magnetic field of the S pole of the arc-striking magnet 15, the arc-striking magnet 15 guides the arc to stretch the arc toward the movable spring 141, and then, the current on the other side flows from the first movable contact 1421 toward the first fixed contact 1321, and the first fixed contact 1321 and the first movable contact 1421 are close to the S pole of the arc-striking magnet 15 and away from the magnetic field of the N pole of the arc-striking magnet 15, the arc-striking magnet 15 stretches the arc so that the arc contacts the base 10 and the arc is extinguished, as shown in FIG. Fig. 6A In the above structure, the arc can be guided toward the movable spring 141, so that the arc can be guided and extinguished in the following description, and the blocking block 16 can be used to block and offset the arc that is not in the radiation direction. Fig. 6A and Figure 6B The N and S indicated in the figure represent the N pole and S pole positions of the arc-striking magnet 15 .

[0039] As a preferred structural example of the movable elastic piece 141, the movable elastic piece 141 may have an arc-connecting portion 1410, and the arc-connecting portion 1410 includes the connecting section 1411 and two discharge sections 1412 that are exposed and not shielded and symmetrically arranged. More specifically, the arc-connecting portion 1410 may be roughly defined as the area of ​​the movable elastic piece 141 that is not used to set the first movable contact 1421 and the second movable contact 1422. The portion in the area that is connected to the connecting component 11 is the connecting section 1411, and the exposed and unshielded sections in the above-mentioned area are the two discharge sections 1412 for attracting the arc. In terms of the structural aspect of this embodiment, Figure 1A and Figure 1D For example, the arc connecting portion 1410 includes the movable elastic piece 141 embedded in the connecting section 1411 (ie, Figure 1A The dotted line portion in the figure) and the area exposed to the upper connecting component 11, and the area exposed to the upper connecting component 11 is the two discharge sections 1412 (i.e. Figure 1A and Figure 1DThe first movable contact 1421 and the second movable contact 1422 are exposed in the connection assembly 11 and are provided near the end position. Through the arc connection part 1410 and the two discharge sections 1412 structure, when the first movable contact 1421 and the second movable contact 1422 on the left and right sides are separated from the corresponding first fixed contact 1321 and the second fixed contact 1322, the air around the two discharge sections 1412 forms a higher electric field and is ionized by utilizing the fact that the arc is on and not in a power-off state. The ionized air is conductive and causes a discharge phenomenon around the discharge section 1412 to attract the arc. The arc is guided by the arc-starting magnet 15 to stretch the arc toward the arc connection part 1410 to reduce the arc energy density. Then, the stretched arc is attracted by the two discharge sections 1412 on the arc connection part 1410. Figure 1D As shown by the arc in Figure 1D The arrow below the arc in the figure indicates the direction of the magnetic field, so that the arc-connecting portion 1410 can receive the arc energy and extinguish the arc. Accordingly, the present invention can achieve the purpose of using the discharge effect of the tip of the lightning conductor to attract lightning strikes and prevent surrounding objects from being damaged by lightning, and guiding the arc toward the arc-connecting portion 1410 through the arc-starting magnet 15 in the relay to stretch the arc and reduce the arc energy density, and then attracting the stretched arc through the two discharge sections 1412 on the arc-connecting portion 1410, so that the arc-connecting portion 1410 receives the arc energy (such as heat energy) and extinguishes the arc, and using the discharge effect of the tip of the lightning conductor to attract the arc and prevent surrounding objects in the relay from being damaged by the arc.

[0040] In addition, preferably, in one embodiment, the base 10 further has two magnetic element assembly parts 101, which are symmetrically arranged with the blocking block 16 as the center and are located on opposite sides of the first fixed contact 1321 and the second fixed contact 1322. Each of the magnetic element assembly parts 101 has a magnet 102, wherein the magnet 102 is arranged in the same state as the magnetic pole setting direction of the arc-striking magnet 15, so that the magnet 102 and the arc-striking magnet 15 are in a state of oppositely attracted magnetic poles on adjacent sides, such as Figure 7 to Figure 8BAs shown. Accordingly, the strength of the magnetic force can be increased, and the overall magnetic field distribution will be more stable, which can effectively improve the arc-striking effect. In addition, in this structural state, the magnets 102 on both sides, the arc-striking magnets 15 located in the central position, and even the magnets 102 on both sides can all use magnetic elements with weaker magnetic forces, thereby effectively reducing the cost of the required components while still maintaining an excellent arc-striking effect. More specifically, each of the magnetic element assembly parts 101 is a convex block structure, and its height can be roughly equal to that of the barrier block 16. Each of the magnetic element assembly parts 101 has a set of grooves 1011, and the openings of the set of grooves 1011 are opened on the bottom surface of the base 10, so as to facilitate the two magnets 102 to be respectively arranged in the two magnetic element assembly parts 101 from the bottom side of the base 10. For example, when the first movable contact 1421 and the first fixed contact 1321 are arranged near the N pole of the arc-striking magnet 15, the side of the magnet 102 arranged near the first movable contact 1421 and the first fixed contact 1321 that is closer to the N pole of the arc-striking magnet 15 will be the S pole, and the opposite side will be the N pole, and the side of the magnet 102 arranged near the second movable contact 1422 and the second fixed contact 1322 that is closer to the S pole of the arc-striking magnet 15 will be the N pole, and the opposite side will be the S pole. The magnet 102 is in a state with the same magnetic pole setting direction as the arc-striking magnet 15, such as Fig. 8A As shown, Fig. 8A The N and S indicated in the figure represent the N and S pole positions of the arc-striking magnet 15 and the magnet 102. Figure 8B As shown, when the second movable contact 1422 and the second fixed contact 1322 are arranged adjacent to the N pole of the arc-striking magnet 15, the side of the magnet 102 arranged near the first movable contact 1421 and the first fixed contact 1321 that is closer to the S pole of the arc-striking magnet 15 will be the N pole, and the opposite side will be the S pole, and the side of the magnet 102 arranged near the second movable contact 1422 and the second fixed contact 1322 that is closer to the N pole of the arc-striking magnet 15 will be the S pole, and the opposite side will be the N pole, and the magnet 102 will be in the same state as the magnetic pole setting direction of the arc-striking magnet 15, wherein Figure 8B The N and S indicated therein represent the N-pole and S-pole positions of the arc-striking magnet 15 and the magnet 102 .

[0041] In addition, the blocking block 16 also has a double-sided energy absorbing portion 160, and the double-sided energy absorbing portion 160 includes a first absorbing surface 1601 and a second absorbing surface 1602. The first absorbing surface 1601 and the second absorbing surface 1602 are arranged opposite to each other to absorb arc heat energy respectively, and the first absorbing surface 1601 and the second absorbing surface 1602 are non-magnetic polymers. Through the double-sided energy absorbing portion 160, the heat energy brought by the arc toward the arc connecting portion 1410 after first touching the first absorbing surface 1601 or the second absorbing surface 1602 can be partially absorbed to reduce the damage effect of the arc on the relay, and then the arc energy (such as heat energy) is received by the arc connecting portion 1410 to extinguish the arc.

[0042] Preferably, the blocking block 16 has a base 162 and a protrusion 163. The base 162 can be a rectangular structure. The protrusion 163 is generally L-shaped and is protruded from the front side and the top side of the base 162, preferably protruded from the center of the base 162. The arc-striking magnet 161 is located inside the base 162, wherein the minimum vertical distance between the edges of the first movable contact 1421 and the second movable contact 1422 and the first fixed contact 1321 and the second fixed contact 1322 and the arc-striking magnet 15 is 3 to 11 mm, Figure 3A indicates the minimum vertical distance between the edge of the two fixed contacts 132 and the arc-striking magnet 15. As for the blocking block 16, considering the arrangement of the arc-striking magnet 15 and the purpose of achieving "non-polarity" application, the blocking block 16 is made to have a structure of the base 162 and the protrusion 163. Firstly, by making the protrusion 163 protrude from the base 162, the effective area of ​​the blocking block 16 can be expanded through the protrusion 162, which is more conducive to blocking the arc generated during operation and ensuring the arc interruption and elimination function; secondly, by using the base 162 structure to accommodate the arc-striking magnet 15, the space of the base 10 can be used more efficiently, and there is no need to reserve a corresponding space on the base 10 due to the placement requirement of the arc-striking magnet 15 between the two fixed conductive sheets 131, which causes complicated and inconvenient production. Regarding the spacing between the first movable contact 1421 and the second movable contact 1422 and the edges of the first fixed contact 1321 and the second fixed contact 1322 and the arc-striking magnet 15, the present invention also proposes a better ruler condition, so that when the minimum vertical distance between the first movable contact 1421 and the second movable contact 1422 and the first fixed contact 1321 and the second fixed contact 1322 and the arc-striking magnet 15 is between 3 and 11 mm, a better arc blowing effect can be formed. Considering the application scope of the non-polarity snap-on electromagnetic relay 1 and the development trend and market demand of relay miniaturization, a better structure must be planned in a limited space. Therefore, in order to ensure the arc blowing strength and accuracy of the arc-striking magnet 15, when the minimum vertical distance A between the first movable contact 1421 and the second movable contact 1422 and the first fixed contact 1321 and the second fixed contact 1322 and the arc-striking magnet 15 is between 3 and 11 mm, the purpose of arranging the arc-striking magnet 15 with high arc blowing performance in a limited space can be achieved, so that the arc generated by the non-polarity snap-on electromagnetic relay 1 in any current conduction direction can be guided to the position of the blocking block 16 by the arc-striking magnet 15, thereby preventing the damage and negative impact caused by the arc and meeting the miniaturization requirements. In addition, when the double-sided energy absorbing part 160 is provided, the double-sided energy absorbing part 160 can be a local structure of the base 162, that is, located on the base 162, and of course, it can also be a different structural block from the base 162.

[0043] In addition, if Figure 2A and Figure 2B As shown, in order to further enhance the arc interruption and extinguishing performance, and considering the overall volume of the base 10, the rear side of the base 162 may be provided with an extension portion 164, and the thickness of the extension portion 164 is equal to the thickness of the protrusion 161, so as to expand the effective area of ​​the barrier block 16 so as to have both arc extinguishing performance and meet the miniaturization requirements required by the market.

[0044] For an example of a preferred structural ruler, see Figure 2B and Figure 3 As shown, the maximum thickness T1 of the blocking block 16 is 5 to 10 mm, the maximum height H1 of the blocking block 16 is 19 to 27 mm, and the maximum length L1 of the blocking block 16 is 10.5 to 17 mm; the minimum distance D1 between the edges of the first fixed contact 1321 and the second fixed contact 1322 and the blocking block 16 is 1 to 10 mm, and the minimum distance D2 between the edges of the first fixed contact 1321 and the second fixed contact 1322 and the base 10 is 2.9 to 15.

[0045] In the structural state of the blocking block 16 having the base 162 and the protrusion 163, the inventor proposes a preferred implementation state with respect to further gauge limitations of the blocking block 16, so that the thickness T2 of the protrusion 163 is 1 to 3 mm, the protrusion height H2 of the protrusion 163 on the top side of the base 162 is 4 to 6 mm, and the length L2 of the protrusion 163 is 7 to 10 mm. Through the above-mentioned gauge condition range, the blocking block 16 can still retain the advantage of miniaturization in volume while expanding the effective area, while also saving materials and making the structural configuration of the non-polarity snap-on electromagnetic relay 1 more flexible and appropriate. Preferably, the thickness T2 of the protrusion 163 can be, for example, 2 mm, the protrusion height H2 of the protrusion 163 on the top side of the base 162 can be, for example, 5.5 mm, and the length L2 of the protrusion 163 can be, for example, 8.5 mm.

[0046] In practical implementation, in principle, the non-polarity snap-on electromagnetic relay 1 can be applied in the range of 600V DC and 10-50A power, and the arc can be interrupted and extinguished through the above-mentioned structural features. The present invention also proposes a better ruler limit, which can make the minimum distance D1 between the edges of the first fixed contact 1321 and the second fixed contact 1322 and the blocking block 16 5.5-6 mm, for example 5.8 mm; the maximum thickness T1 of the blocking block 16 can be 8-8.5 mm, for example 8.4 mm; the maximum height H1 of the blocking block 16 can be 25.5-26 mm, for example 25.9 mm; the maximum length L1 of the blocking block 16 can be 15.5-16.5 mm, for example 16.1 mm; the minimum vertical distance A between the edges of the first movable contact 1421 and the second movable contact 1422 and the first fixed contact 1321 and the second fixed contact 1322 and the arc-striking magnet 15 is 3.5-4.5 mm, for example 4.2 mm. When the polarity-free snap-on electromagnetic relay 1 is within the above-mentioned gauge conditions, it can not only meet the market demand for miniaturization, but also achieve the arc blowing effect through the arc-starting magnet 15 located between the two fixed conductive plates 141 during operation within a limited installation space, and the arc is interrupted and extinguished through the special structural state of the blocking block 16, so that the electromagnetic relay can achieve "polarity-free" application.

[0047] Since the arc energy intensity and direction generated during operation are closely related to the overall structure of the relay, in order to successfully interrupt and extinguish the arc, the arc extinguishing structure must also be designed in accordance with the structure of the relay, and further consideration is given to the gauge parameters between the arc extinguishing structure and the main arc generating structures such as the movable contact assembly 14 and the fixed contact assembly 13. The non-polarity snap-on electromagnetic relay 1 of the present invention, after meeting the various gauge structural conditions as described above, can more reliably achieve the purpose and effect of interrupting the arc to prevent the arc from damaging the relay. In other words, the gauge conditions further proposed by the present invention are not technical features that can be easily thought of by those with ordinary knowledge in the technical field through other existing relay technologies, but have their specific limiting significance.

[0048] In addition, the non-polarity snap-on electromagnetic relay 1 can also be used in applications requiring large current transmission. In this case, the diameters of the first fixed contact 1321 and the second fixed contact 1322 can be 2-5 mm to facilitate carrying a larger current. Preferably, the diameters of the first fixed contact 1321 and the second fixed contact 1322 can be 3.5 mm. In addition, the material of the blocking block 16 can be made of organic or inorganic polymer materials, such as nylon, LCP (LIQUID CRYSTAL POLYMER), silicon dioxide, thermal conductive plastics, etc.

[0049] As for the connection component 12, Figure 1A and Figure 4 As shown, in a preferred application state, there is a bracket 121, an elastic member 122, a magnetic member 123 and a fixing member 124, the bracket 121 is arranged on the electromagnetic coil assembly 11, one end of the elastic member 122 is fixedly arranged on the bracket 121, and the other end is fixedly arranged on the magnetic member 123, the fixing member 124 is assembled on the magnetic member 123, and the connecting section 1411 of the movable elastic sheet 141 is arranged on the fixing member 124; when the electromagnetic coil assembly 11 generates magnetic force, the magnetic member 123 is attracted by the electromagnetic coil assembly 11. 1 attracts and drives the fixing member 124, so that the first movable contact 1421 and the second movable contact 1422 contact the first fixed contact 1321 and the second fixed contact 1322, and at the same time, a force is applied to the elastic member 122; when the electromagnetic coil group 11 does not generate magnetic force, the magnetic attraction member 123 and the fixing member 124 are reset by the force of the elastic member 122, so that the first movable contact 1421 and the second movable contact 1422 are separated from the first fixed contact 1321 and the second fixed contact 1322. The above structure is conducive to stably driving the movable contact assembly 14 to move, so that the contact or separation action of the first movable contact 1421 and the second movable contact 1422 and the first fixed contact 1321 and the second fixed contact 1322 is more reliable, thereby improving the application performance of the non-polarity snap-on electromagnetic relay 1. The elastic member 122 can be a spring or a spring sheet depending on the application or manufacturing requirements. In this embodiment, the elastic member 122 is a spring sheet as an example, so as to utilize the elasticity of the spring sheet to achieve the effect of enabling the magnetic member 123 to drive the movable contact assembly 14 to reset.

[0050] In summary, the polarity-free snap-on electromagnetic relay of the present invention utilizes the structural features of the barrier block and the arc-striking magnet to achieve the special effect of "polarity-free" application. To reiterate here, "polarity-free" means that the polarity-free snap-on electromagnetic relay of the present invention performs charging or discharging operations by electrically conducting with two electrodes without considering the positive and negative polarities, that is, after the polarity-free snap-on electromagnetic relay is electrically conducted with the electrodes, no matter what the current conduction direction is, it can effectively block the arc generated during operation, which is essentially very different from the electromagnetic relays that only allow a single current conduction direction in the past. Especially in the field of snap-on relays, since snap-on action must be formed, the basic design of the relay structure is subject to greater restrictions, and the margin for planning and setting the arc extinguishing structure is also greatly reduced. Therefore, the existing snap-on relays can only perform arc extinguishing design for the arc direction generated under unidirectional current conduction. However, in view of the fact that the application of bidirectional current conduction is becoming more and more popular in actual applications, especially electric vehicles or solar energy storage systems and other power products or systems, the electromagnetic relays must have the functions of charging and discharging. Therefore, the electromagnetic relay must operate stably and safely under bidirectional current conduction. Based on this, the inventors have conceived and continuously changed and adjusted, and proposed a relay structure with a specific structure and further restrictions on the setting of a ruler or arc-starting magnet, which can effectively block and extinguish the arc under both charging and discharging current conduction, and realize the "polarity-free" application. Finally, the present invention achieves another purpose. Lightning is essentially a kind of arc, and the tip discharge effect of the lightning rod (Lightning Conductor) is used to attract arc shock to prevent surrounding objects from being damaged by lightning. The present invention guides the arc toward the arc-connecting part through the arc-starting magnet on the relay to stretch the arc to reduce the arc energy density, and then attracts the stretched arc through the discharge section on the arc-connecting part, so that the arc-connecting part receives the arc energy (such as heat energy) and extinguishes the arc, preventing the surrounding objects in the relay from being damaged by the arc.

[0051] The above is only an illustration of the preferred embodiment of the present invention, and the scope of the present invention is not limited by the content of this embodiment; therefore, any changes or modifications made without departing from the equivalent scope of the present invention should still be included in the scope of the claims of the present invention.

Claims

1. A non-polarity snap-on electromagnetic relay, which can connect two electrodes arbitrarily for electrical conduction to perform charging or discharging operations without considering the positive and negative polarities. The non-polarity snap-on electromagnetic relay comprises a base, an electromagnetic coil assembly, a connecting assembly, a fixed contact assembly and a movable contact assembly. The electromagnetic coil assembly, the connecting assembly, the fixed contact assembly and the movable contact assembly are respectively arranged on the base; the connecting assembly is arranged on one side of the electromagnetic coil assembly to be actuated according to the driving state of the electromagnetic coil assembly, and is characterized in that: The fixed contact assembly has two fixed conductive sheets, a first fixed contact and a second fixed contact, the two fixed conductive sheets are symmetrically arranged and one end of each sheet extends outside the base, the first fixed contact is arranged on any one of the fixed conductive sheets, and the second fixed contact is arranged on the other fixed conductive sheet; the movable contact assembly includes a movable spring sheet, a first movable contact and a second movable contact, the movable spring sheet has a gap formed by extending inward from one end thereof, the first movable contact and the second movable contact are respectively arranged on the movable spring sheet and are located on both sides of the gap and are in contact with the first fixed contact. The movable spring sheet has a connecting section at the opposite end where the first movable contact and the second movable contact are arranged, and the connecting section is linked by the connecting component, so that the first movable contact and the second movable contact can contact or separate with the first fixed contact and the second fixed contact; the base also has a blocking block, which is located between the two fixed conductive sheets, and the movable spring sheet is arranged across the blocking block so that the travel actuation of the first movable contact and the second movable contact are both placed on both sides of the blocking block, wherein the blocking block has an arc-striking magnet.

2. The non-polarity snap-on electromagnetic relay according to claim 1, characterized in that: The arc-striking magnet has relative north and south poles. When current flows from the first movable contact toward the first fixed contact, and the first fixed contact and the first movable contact are close to the north pole of the arc-striking magnet and away from the magnetic field of the south pole of the arc-striking magnet, or when current flows from the first fixed contact toward the first movable contact, and the first fixed contact and the first movable contact are close to the south pole of the arc-striking magnet and away from the magnetic field of the north pole of the arc-striking magnet, the arc-striking magnet guides the arc to stretch the arc toward the movable spring.

3. The non-polarity snap-on electromagnetic relay according to claim 2, characterized in that: The movable spring has an arc connecting portion, which includes the connecting section and two symmetrically arranged discharge sections. The two discharge sections attract the arc, and the arc is guided by the arc-starting magnet to stretch the arc toward the arc connecting portion to reduce the arc energy density. The stretched arc is then attracted by the two discharge sections on the arc connecting portion, so that the arc connecting portion receives the arc energy and extinguishes the arc.

4. The non-polarity snap-on electromagnetic relay according to claim 3, characterized in that: The base also has two magnetic element assembly parts, which are symmetrically arranged with the blocking block as the center and are located on opposite sides of the first fixed contact and the second fixed contact. Each of the magnetic element assembly parts has a magnet, and the magnet is set in the same state as the setting direction of the arc-striking magnet pole.

5. The non-polarity snap-on electromagnetic relay according to claim 4, characterized in that: The blocking block also has a double-sided energy absorption part, which includes a first absorption surface and a second absorption surface. The first absorption surface and the second absorption surface are relatively arranged to absorb arc heat energy respectively, and the first absorption surface and the second absorption surface are non-magnetic polymers.

6. The non-polarity snap-on electromagnetic relay according to claim 1, characterized in that: The arc-striking magnet has relative north and south poles. When current flows from the second movable contact toward the second fixed contact and the second fixed contact and the second movable contact are close to the south pole of the arc-striking magnet and away from the magnetic field of the north pole of the arc-striking magnet, or when current flows from the second fixed contact toward the second movable contact and the second fixed contact and the second movable contact are close to the north pole of the arc-striking magnet and away from the magnetic field of the south pole of the arc-striking magnet, the arc-striking magnet guides the arc to stretch the arc toward the movable spring.

7. The non-polarity snap-on electromagnetic relay according to claim 6, characterized in that: The movable spring piece has an arc connecting portion, which has two symmetrically arranged discharge sections. The two discharge sections attract the arc, and the arc is guided by the arc-starting magnet to stretch the arc toward the arc connecting portion to reduce the arc energy density. The stretched arc is then attracted by the two discharge sections on the arc connecting portion, so that the arc connecting portion receives the arc energy and extinguishes the arc.

8. The non-polarity snap-on electromagnetic relay according to claim 7, characterized in that: The base also has two magnetic element assembly parts, which are symmetrically arranged with the blocking block as the center and are located on opposite sides of the first fixed contact and the second fixed contact. Each of the magnetic element assembly parts has a magnet, and the magnet is set in the same state as the setting direction of the arc-striking magnet pole.

9. The non-polarity snap-on electromagnetic relay according to claim 8, characterized in that: The blocking block also has a double-sided energy absorption part, which includes a first absorption surface and a second absorption surface. The first absorption surface and the second absorption surface are relatively arranged to absorb arc heat energy respectively, wherein the first absorption surface and the second absorption surface are non-magnetic polymers.

10. The polarity-free snap-on electromagnetic relay according to any one of claims 2 to 9, characterized in that: The blocking block has a base and a protrusion, the protrusion is roughly L-shaped and protrudes from the front and top sides of the base, the thickness of the protrusion is smaller than the base, and the minimum vertical distance between the edges of the first movable contact and the second movable contact and the first fixed contact and the second fixed contact and the arc-striking magnet is 3 to 11 mm.

11. The non-polarity snap-on electromagnetic relay according to claim 10, characterized in that: The minimum distance D1 between the edges of the first fixed contact and the second fixed contact and the blocking block is 1-10 mm, and the minimum distance D2 between the edges of the first fixed contact and the second fixed contact and the base is 2.9-15 mm.

12. The non-polarity snap-on electromagnetic relay according to claim 11, characterized in that: The connection component comprises a bracket, an elastic member, a magnetic member and a fixing member, the bracket is connected to the electromagnetic coil group, one end of the elastic member is fixed to the bracket, and the other end is fixed to the magnetic member, the fixing member is assembled on the magnetic member, and the connecting section of the movable elastic sheet is arranged on the fixing member; when the electromagnetic coil group generates magnetic force, the magnetic member is attracted by the electromagnetic coil group and drives the fixing member, so that the first movable contact and the second movable contact are in contact with the first fixed contact and the second fixed contact, and a force is applied to the elastic member at the same time; when the electromagnetic coil group does not generate magnetic force, the magnetic member and the fixing member are reset by the force of the elastic member, so that the first movable contact and the second movable contact are separated from the first fixed contact and the second fixed contact.

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