Arc path forming portion and DC relay including the same

Abstract

The present invention discloses an arc path forming part and a DC relay. The arc path forming part of an embodiment of the present invention includes a plurality of magnet parts. Each magnet part is arranged adjacent to a plurality of fixed contacts. The facing surfaces of the plurality of magnet parts arranged adjacent to one fixed contact and facing each other and the facing surfaces of the magnet parts arranged adjacent to another fixed contact facing each other have the same polarity. Thus, the direction of the electromagnetic force formed on each fixed contact is formed in a direction away from each other and away from the center. Thus, the damage to the various structural elements of the arc path forming part and the DC relay caused by the generated arc can be minimized.

Description

Technical Field

[0001] The present invention relates to an arc path forming portion and a DC relay including the arc path forming portion, and more specifically, to an arc path forming portion having a structure that can utilize electromagnetic force to form an arc discharge path and prevent the DC relay from being damaged, and a DC relay including the arc path forming portion. Background Art

[0002] A direct current relay is a device that uses the principle of an electromagnet to transmit mechanical drive or current signals. A direct current relay is also called an electromagnetic switch and is generally classified as a circuit switching device.

[0003] A DC relay includes a fixed contact and a movable contact. The fixed contact is connected to an external power source and a load in a manner that allows electricity to flow. The fixed contact and the movable contact can contact or separate from each other.

[0004] The contact and separation between the fixed contact and the movable contact allow or block the energization via the DC relay. The movement is achieved by a drive unit that applies a driving force to the movable contact.

[0005] When the fixed contact and the movable contact are separated, an arc is generated between the fixed contact and the movable contact. An arc is the flow of high-voltage and high-temperature current. Therefore, the generated arc needs to be quickly discharged from the DC relay via a predetermined path.

[0006] The discharge path of the arc is formed by a magnet provided in the DC relay. The magnet forms a magnetic field inside the space where the fixed contact and the movable contact are in contact. The discharge path of the arc can be formed by the electromagnetic force generated by the formed magnetic field and the flow of current.

[0007] Reference Figure 1 , shows a space provided in the prior art DC relay 1000 where the fixed contact 1100 and the movable contact 1200 are in contact. As described above, the permanent magnet 1300 is provided in the space.

[0008] The permanent magnet 1300 includes a first permanent magnet 1310 located at the upper side and a second magnet 1320 located at the lower side. The lower side of the first permanent magnet 1310 is magnetized to an N pole, and the upper side of the second permanent magnet 1320 is magnetized to an S pole. Thus, a magnetic field is formed in a direction from the upper side to the lower side.

[0009] exist Figure 1In (a), a state in which current flows in through the fixed contact 1100 on the left and flows out through the fixed contact 1100 on the right is shown. According to Fleming's left-hand rule, as shown by the oblique line shaded arrow, the direction of the electromagnetic force is formed toward the outside. Therefore, the generated arc can be discharged to the outside along the direction of the electromagnetic force.

[0010] On the contrary, Figure 1 In (b), a state in which current flows in through the right fixed contact 1100 and flows out through the left fixed contact 1100 is shown. According to Fleming's left-hand rule, as shown by the oblique line shaded arrow, the direction of the electromagnetic force is formed toward the inside. Therefore, the generated arc moves toward the inside along the direction of the electromagnetic force.

[0011] A plurality of members for vertically driving the movable contact 1200 are provided in the central portion of the DC relay 1000, that is, in the space between the fixed contacts 1100. For example, a shaft and a spring member inserted through the shaft are provided at the position.

[0012] Therefore, if Figure 1 As shown in (b), when the generated arc moves toward the central portion, there is a risk that a plurality of components provided at the position may be damaged by the energy of the arc.

[0013] And, if Figure 1 As shown, the direction of the electromagnetic force formed inside the DC relay 1000 of the prior art depends on the direction of the current flowing in the fixed contact 1200. Therefore, it is preferred that the current flows in the fixed contact 1100 only in a preset direction, that is, only in Figure 1 Flow in the direction shown in (a).

[0014] That is, the user needs to consider the direction of the current every time he uses the DC relay. This may cause inconvenience in the use of the DC relay. Moreover, regardless of the user's intention, it is impossible to rule out the situation where the direction of the current applied to the DC relay changes due to unskilled operation.

[0015] In this case, the components provided in the center of the DC relay may be damaged by the generated arc, which not only reduces the durability of the DC relay but also poses a risk of causing a safety accident.

[0016] Korean Patent No. 10-1696952 discloses a DC relay, and more specifically, discloses a DC relay having a structure capable of preventing a movable contact from moving by using a plurality of permanent magnets.

[0017] However, although the DC relay having the above structure can prevent the movable contact from moving by using a plurality of permanent magnets, there is a limitation in that the technical solution for controlling the direction of the arc discharge path is not considered.

[0018] Korean Patent Publication No. 10-1216824 discloses a DC relay, and more specifically, discloses a DC relay having a structure that uses a damping magnet to prevent any separation between a movable contact and a fixed contact.

[0019] However, the DC relay having the above structure only discloses a technical solution for maintaining the contact state between the movable contact and the fixed contact, that is, there is a limitation that no technical solution is proposed for forming a discharge path for the arc generated when the movable contact and the fixed contact are separated.

[0020] Korean Patent Document No. 10-1696952 (2017.01.16)

[0021] Korean Patent Document No. 10-1216824 (2012.12.28) Summary of the invention

[0022] Problem to be solved

[0023] An object of the present invention is to provide an arc path forming portion having a structure capable of solving the above-mentioned problem, and a DC relay including the arc path forming portion.

[0024] First, an object of the present invention is to provide an arc path forming portion having a structure in which a generated arc does not extend toward a central portion, and a DC relay including the arc path forming portion.

[0025] Another object of the present invention is to provide an arc path forming portion having a structure capable of minimizing damage to a member located in a central portion due to an arc generated, and a DC relay including the arc path forming portion.

[0026] Another object of the present invention is to provide an arc path forming portion having a structure that allows a generated arc to move and be sufficiently extinguished, and a DC relay including the arc path forming portion.

[0027] Another object of the present invention is to provide an arc path forming portion having a structure capable of enhancing the strength of a magnetic field for forming an arc discharge path, and a DC relay including the arc path forming portion.

[0028] Another object of the present invention is to provide an arc path forming portion having a structure that enables formed arc paths to not overlap with each other, and a DC relay including the arc path forming portion.

[0029] Another object of the present invention is to provide an arc path forming portion having a structure capable of changing an arc discharge path without excessively changing the structure, and a DC relay including the arc path forming portion.

[0030] Technical solutions to the problem

[0031] In order to achieve the above-mentioned purpose, the present invention provides an arc path forming portion, which includes: a magnet frame, a space is formed inside the magnet frame, and the magnet frame has a plurality of surfaces surrounding the space; and a magnet portion, which is combined with the plurality of surfaces and forms a magnetic field in the space, the magnet frame includes: a first surface, which is extended along one direction; and a second surface, which is opposite to the first surface and extended along the one direction, the magnet portion includes: a first magnet portion, which is located on the first surface; and a second magnet portion, which is arranged on the second surface in a manner opposite to the first magnet portion, and the first opposing surface of the first magnet portion facing the second magnet portion and the second opposing surface of the second magnet portion facing the first magnet portion have the same polarity.

[0032] Furthermore, the magnet frame of the arc path forming portion may include a third surface formed continuously with one end portion of the first surface and one end portion of the second surface, and the magnet portion may include a third magnet portion located on the third surface.

[0033] Furthermore, in the arc path forming portion, a third facing surface of the third magnet portion that faces the first magnet portion or the second magnet portion may have the same polarity as the first facing surface and the second facing surface.

[0034] Furthermore, the space in the arc path forming portion can accommodate a fixed contact extending along the one direction and a movable contact configured to contact or separate from the fixed contact, the fixed contact including a first fixed contact located on one side of the one direction and a second fixed contact located on the other side of the one direction, the first magnet portion and the second magnet portion are configured adjacent to the first fixed contact, and the third magnet portion is configured adjacent to the second fixed contact.

[0035] Furthermore, the space in the arc path forming portion can accommodate a fixed contact extending along the one direction and a movable contact configured to contact or separate from the fixed contact, the fixed contact including a first fixed contact located on one side of the one direction and a second fixed contact located on the other side of the one direction, the first magnet portion and the second magnet portion are configured adjacent to the second fixed contact, and the third magnet portion is configured adjacent to the first fixed contact.

[0036] Furthermore, the space in the arc path forming portion can accommodate a fixed contact extending along the one direction and a movable contact configured to contact or separate from the fixed contact, the fixed contact including a first fixed contact located on one side of the one direction and a second fixed contact located on the other side of the one direction, the first magnet portion and the second magnet portion are arranged adjacent to one of the first fixed contact and the second fixed contact, the third magnet portion is arranged adjacent to the other of the first fixed contact and the second fixed contact, and a rib portion is formed on one or more of the first surface and the second surface, the rib portion is located between the first fixed contact and the second fixed contact, and protrudes into the space by a specified length.

[0037] Furthermore, in the arc path forming portion, the ribs may be formed on both the first surface and the second surface, respectively, and the ribs may be arranged adjacent to the center in the one direction in which the first surface and the second surface extend.

[0038] Furthermore, the present invention provides a DC relay, which includes: a fixed contact, which is formed by extending in one direction; a movable contact, which is in contact with or separated from the fixed contact; and an arc path forming portion, wherein a space for accommodating the fixed contact and the movable contact is formed inside the arc path forming portion, and the arc path forming portion is configured to form a magnetic field in the space to form a discharge path for the arc generated by the separation of the fixed contact and the movable contact, and the arc path forming portion includes: a magnet frame, wherein a space portion is formed inside the magnet frame, and a magnet frame has a magnetic field surrounding the magnet frame. A plurality of surfaces of a space portion; and a magnet portion, which is combined with the plurality of surfaces and forms a magnetic field in the space portion, the magnet frame comprising: a first surface, which is formed by extending along one direction; and a second surface, which is opposite to the first surface and is formed by extending along the one direction, the magnet portion comprising: a first magnet portion, which is located on the first surface; and a second magnet portion, which is arranged on the second surface in a manner opposite to the first magnet portion, and a first opposing surface of the first magnet portion facing the second magnet portion and a second opposing surface of the second magnet portion facing the first magnet portion have the same polarity.

[0039] Furthermore, in the DC relay, the magnet frame may include: a third surface extending between one side end of the first surface and one side end of the second surface; and a fourth surface facing the third surface and extending between the other side end of the first surface and the other side end of the second surface.

[0040] Furthermore, in the DC relay, the magnet portion may include: a third magnet portion located on one of the third surface and the fourth surface and extending between the first surface and the second surface.

[0041] Furthermore, in the DC relay, a third facing surface of the third magnet portion that faces the space portion may have the same polarity as the first facing surface and the second facing surface.

[0042] Furthermore, in the DC relay, the fixed contact may include: a first fixed contact, which is arranged adjacent to one side end in the one direction; and a second fixed contact, which is arranged adjacent to the other side end in the one direction, the magnet portion includes a third magnet portion, which is arranged to be away from the first magnet portion and the second magnet portion, the first magnet portion and the second magnet portion are arranged adjacent to one of the first fixed contact and the second fixed contact, and the third magnet portion is arranged adjacent to the other of the first fixed contact and the second fixed contact.

[0043] Furthermore, in the DC relay, a third facing surface of the third magnet portion that faces the first magnet portion or the second magnet portion may have the same polarity as the first facing surface and the second facing surface.

[0044] Furthermore, in the DC relay, a magnetic force of the third magnet portion may be greater than magnetic forces of the first magnet portion and the second magnet portion.

[0045] Furthermore, a rib may be formed on one or more of the first surface and the second surface of the magnet frame. The rib is located between the first fixed contact and the second fixed contact and protrudes toward the space by a predetermined length.

[0046] Furthermore, the present invention provides an arc path forming portion, which includes: a magnet frame, a space is formed inside the magnet frame, and the magnet frame has a plurality of surfaces surrounding the space; and a magnet portion, which is combined with the plurality of surfaces and forms a magnetic field in the space, the magnet frame includes: a first surface, which is formed by extending along one direction; a second surface, which is opposite to the first surface and is formed by extending along the one direction; and a third surface, which is formed by extending between one side end of the first surface and one side end of the second surface, the magnet portion includes: a first magnet portion, which is located on the first surface; a second magnet portion, which is arranged on the second surface in a manner opposite to the first magnet portion; and a third magnet portion, which is located on the third surface, and a first opposing surface of the first magnet portion facing the second magnet portion and a second opposing surface of the second magnet portion facing the first magnet portion have the same polarity.

[0047] Furthermore, in the arc path forming portion, a third facing surface of the third magnet portion that faces the first magnet portion or the second magnet portion may have a polarity different from that of the first facing surface and the second facing surface.

[0048] Furthermore, the space in the arc path forming portion can accommodate a fixed contact extending along the one direction and a movable contact configured to contact or separate from the fixed contact, the fixed contact including a first fixed contact located on one side of the one direction and a second fixed contact located on the other side of the one direction, the first magnet portion and the second magnet portion are configured adjacent to the first fixed contact, and the third magnet portion is configured adjacent to the second fixed contact.

[0049] Furthermore, the space in the arc path forming portion can accommodate a fixed contact extending along the one direction and a movable contact configured to contact or separate from the fixed contact, the fixed contact including a first fixed contact located on one side of the one direction and a second fixed contact located on the other side of the one direction, the first magnet portion and the second magnet portion are configured adjacent to the second fixed contact, and the third magnet portion is configured adjacent to the first fixed contact.

[0050] Furthermore, the space in the arc path forming portion can accommodate a fixed contact extending along the one direction and a movable contact configured to contact or separate from the fixed contact, the fixed contact including a first fixed contact located on one side of the one direction and a second fixed contact located on the other side of the one direction, the first magnet portion and the second magnet portion are arranged adjacent to one of the first fixed contact and the second fixed contact, the third magnet portion is arranged adjacent to the other of the first fixed contact and the second fixed contact, and a rib portion is formed on one or more of the first surface and the second surface, the rib portion is located between the first fixed contact and the second fixed contact, and protrudes into the space by a specified length.

[0051] Furthermore, in the arc path forming portion, the ribs may be formed on both the first surface and the second surface, and the ribs may be arranged adjacent to the center in the one direction in which the first surface and the second surface extend.

[0052] Furthermore, a magnetic force of the third magnet portion may be greater than magnetic forces of the first magnet portion and the second magnet portion.

[0053] Furthermore, the present invention provides a DC relay, comprising: a fixed contact, which is formed extending in one direction; a movable contact, which contacts with or is separated from the fixed contact; and an arc path forming portion, wherein a space for accommodating the fixed contact and the movable contact is formed inside the arc path forming portion, and the arc path forming portion is configured to form a magnetic field in the space to form a discharge path for the arc generated by the separation of the fixed contact and the movable contact, the arc path forming portion comprising: a magnet frame, wherein a space portion is formed inside the magnet frame, and the magnet frame comprises a plurality of surfaces surrounding the space portion; and a magnet portion, which is combined with the plurality of surfaces and forms a magnetic field in the space portion, the magnet frame comprising: a first surface, which is formed extending in one direction; A second surface, which is opposite to the first surface and extends along the one direction; a third surface, which extends between one side end of the first surface and one side end of the second surface; and a fourth surface, which is opposite to the third surface and extends between the other side end of the first surface and the other side end of the second surface, wherein the magnet part includes: a first magnet part, which is located on the first surface; a second magnet part, which is arranged on the second surface in a manner opposite to the first magnet part; and a third magnet part, which is located on one of the third surface and the fourth surface and extends between the first surface and the second surface, wherein a first opposing surface of the first magnet part facing the second magnet part and a second opposing surface of the second magnet part facing the first magnet part have the same polarity.

[0054] Furthermore, in the DC relay, a third facing surface of the third magnet portion that faces the space portion may have a polarity different from that of the first facing surface and the second facing surface.

[0055] Furthermore, in the DC relay, the fixed contact may include: a first fixed contact, which is arranged adjacent to one side end in the one direction; and a second fixed contact, which is arranged adjacent to the other side end in the one direction, the first magnet portion and the second magnet portion are arranged adjacent to the first fixed contact, and the third magnet portion is arranged adjacent to the second fixed contact.

[0056] Furthermore, the fixed contact may include: a first fixed contact, which is arranged adjacent to one side end in the one direction; and a second fixed contact, which is arranged adjacent to the other side end in the one direction, the first magnet portion and the second magnet portion are arranged adjacent to the second fixed contact, and the third magnet portion is arranged adjacent to the first fixed contact.

[0057] Furthermore, in the DC relay, a magnetic force of the third magnet portion may be greater than magnetic forces of the first magnet portion and the second magnet portion.

[0058] Furthermore, in the DC relay, a rib may be formed on one or more of the first surface and the second surface, and the rib is located between the first fixed contact and the second fixed contact and protrudes toward the space by a predetermined length.

[0059] Furthermore, in the DC relay, the ribs may be formed on both the first surface and the second surface.

[0060] Furthermore, in the DC relay, the rib portion may be located at a center in an extending direction of the first surface and the second surface.

[0061] Technical Effects

[0062] According to the embodiments of the present invention, the following effects can be achieved.

[0063] First, the arc path forming unit forms a magnetic field inside an arc chamber. The magnetic field forms an electromagnetic force together with the current flowing through the fixed contact and the movable contact. The electromagnetic force is formed in a direction away from the center of the arc chamber.

[0064] As a result, the generated arc moves in a direction away from the center of the arc chamber in the same direction as the electromagnetic force. Therefore, the generated arc does not move toward the center of the arc chamber.

[0065] In addition, the sides of the magnets disposed on the mutually facing surfaces have the same polarity. Similarly, the sides of the magnets disposed on the other surfaces facing the magnets have the same polarity as the sides of the magnets disposed on the other surfaces.

[0066] That is, regardless of the direction of the current, the electromagnetic force formed near each fixed contact is formed in a direction away from the center portion.

[0067] In another embodiment, the magnets disposed on the facing surfaces have the same polarity on their sides, and the magnets disposed on the other surfaces have a side facing the magnets different polarity from the side facing the magnets.

[0068] Thus, regardless of the direction of the current, the electromagnetic force formed near each fixed contact is formed in a direction away from the center portion.

[0069] Furthermore, as described above, the generated arc moves in a direction away from the center portion of the arc chamber.

[0070] Therefore, the plurality of components located in the center portion are not damaged by the generated arc.

[0071] Furthermore, the generated arc extends beyond the wider space, that is, the outside of the fixed contacts, and does not extend toward the center of the magnet frame, that is, between the fixed contacts, which is a narrow space.

[0072] Therefore, the arc can be fully extinguished while moving over a longer path.

[0073] Furthermore, the arc paths formed extend in directions away from each other. That is, the paths of the arcs formed near the respective fixed contact parts do not extend toward each other.

[0074] Therefore, arcs flowing along the arc paths formed by electromagnetic force do not overlap each other, thereby minimizing damage to the DC relay caused by the generated arcs.

[0075] In addition, the arc path forming part includes a plurality of magnet parts. Each magnet part forms a main magnetic field between each other. Each magnet part itself forms a secondary magnetic field. The secondary magnetic field is configured to strengthen the strength of the main magnetic field.

[0076] Therefore, the strength of the electromagnetic force formed by the main magnetic field can be enhanced, thereby effectively forming an arc discharge path.

[0077] In addition, electromagnetic forces can be generated in various directions simply by changing the arrangement and polarity of each magnet portion, without changing the structure and shape of the magnet frame for arranging each magnet portion.

[0078] Therefore, the arc discharge direction can be easily changed without significantly changing the overall structure of the arc path forming portion, thereby improving user convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] Figure 1 This is a conceptual diagram showing a moving path of an arc formed in a conventional DC relay.

[0080] Figure 2 It is a perspective view of a DC relay according to an embodiment of the present invention.

[0081] Figure 3 yes Figure 2 Cross-sectional view of a DC relay.

[0082] Figure 4 yes Figure 2 A partially opened perspective view of a DC relay.

[0083] Figure 5 yes Figure 2 A partially opened perspective view of a DC relay.

[0084] Figure 6 This is a conceptual diagram of an arc path forming portion according to an embodiment of the present invention.

[0085] Figure 7 yes Figure 6 A conceptual diagram of an arc path forming portion of a modified example of an embodiment.

[0086] Figure 8 This is a conceptual diagram of an arc path forming portion according to another embodiment of the present invention.

[0087] Fig. 9 yes Figure 8 A conceptual diagram of an arc path forming portion of a modified example of an embodiment.

[0088] Fig.10 It is shown by Figure 6 (a) is a conceptual diagram of an arc path formed by an arc path forming portion of the embodiment shown in FIG.

[0089] Fig.11 It is shown by Figure 6 (b) is a conceptual diagram of an arc path formed by an arc path forming portion of the embodiment shown in FIG.

[0090] Fig.12 It is shown by Figure 7 (a) is a conceptual diagram of an arc path formed by an arc path forming portion of the embodiment shown in FIG.

[0091] Fig.13 It is shown by Figure 7 (b) is a conceptual diagram of an arc path formed by an arc path forming portion of the embodiment shown in FIG.

[0092] Fig.14 It is shown by Figure 8 (a) is a conceptual diagram of an arc path formed by an arc path forming portion of the embodiment shown in FIG.

[0093] Fig.15 It is shown by Figure 8 (b) is a conceptual diagram of an arc path formed by an arc path forming portion of the embodiment shown in FIG.

[0094] Fig.16 It is shown by Fig. 9 (a) is a conceptual diagram of an arc path formed by an arc path forming portion of the embodiment shown in FIG.

[0095] Fig.17 It is shown by Fig. 9 (b) is a conceptual diagram of an arc path formed by an arc path forming portion of the embodiment shown in FIG. DETAILED DESCRIPTION

[0096] Hereinafter, arc path forming parts 500 and 600 and a DC relay 10 including the same according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0097] In the following description, description of some components may be omitted in order to clarify the features of the present invention.

[0098] 1. Definition of terms

[0099] When a structural element is mentioned as being “coupled” or “connected” to other structural elements, it may be directly coupled or connected to the other structural elements, but it should be understood that other structural elements may also be present between them.

[0100] On the contrary, when it is mentioned that a certain structural element is “directly connected” or “directly connected” to other structural elements, it should be understood that there are no other structural elements between them.

[0101] An expression in the singular used in this specification includes an expression in the plural unless the context clearly indicates a different meaning.

[0102] The term "magnetize" used in the following description refers to a phenomenon in which a certain object has magnetism in a magnetic field.

[0103] The term "polarity" used in the following description refers to the different properties of an anode and a cathode of an electrode. In one embodiment, the polarity can be classified as an N pole or an S pole.

[0104] The term "electric current" used in the following description refers to a state in which two or more components are electrically connected. In one embodiment, "electric current" is used to indicate a state in which current flows between two or more components, or to indicate a state in which an electrical signal is transmitted between two or more components.

[0105] The term "arc path" used in the following description refers to a path along which a generated arc moves or a path along which an arc is extinguished and moves.

[0106] The terms “left side”, “right side”, “upper side”, “lower side”, “front side” and “rear side” used in the following description can refer to Figure 2 The coordinate system shown in Figure 1 is understood.

[0107] 2. Description of the structure of the DC relay 10 according to the embodiment of the present invention

[0108] Reference Figure 2 and Figure 3 The DC relay 10 according to the embodiment of the present invention includes a frame portion 100 , a switch portion 200 , a core portion 300 , and a movable contact portion 400 .

[0109] And, refer to Figures 4 to 9 The DC relay 10 of the embodiment of the present invention includes arc path forming parts 500 and 600. The arc path forming parts 500 and 600 can generate electromagnetic force, thereby forming a discharge path for the generated arc.

[0110] Hereinafter, each component of the DC relay 10 according to the embodiment of the present invention will be described with reference to the drawings, and the arc path forming parts 500 and 600 will be described separately.

[0111] (1) Description of the frame portion 100

[0112] The frame 100 forms the outer side of the DC relay 10. A predetermined space is formed inside the frame 100. Various devices for performing the function of causing the DC relay 10 to switch on or off the current transmitted from the outside can be accommodated in the space.

[0113] That is, the frame portion 100 functions as a kind of housing.

[0114] The frame 100 may be formed of an insulating material such as synthetic resin to prevent the inside and outside of the frame 100 from being arbitrarily electrified.

[0115] The frame portion 100 includes an upper frame 110 , a lower frame 120 , an insulating plate 130 , and a support plate 140 .

[0116] The upper frame 110 forms the upper side of the frame portion 100. A predetermined space is formed inside the upper frame 110.

[0117] The switch unit 200 and the movable contact unit 400 may be accommodated in the internal space of the upper frame 110. In addition, the arc path forming units 500 and 600 may be accommodated in the internal space of the upper frame 110.

[0118] The upper frame 110 may be combined with the lower frame 120. An insulating plate 130 and a support plate 140 may be provided in a space between the upper frame 110 and the lower frame 120.

[0119] The fixed contact 220 of the switch 200 is located on one side of the upper frame 110, that is, the upper side in the illustrated embodiment. A portion of the fixed contact 220 is exposed from the upper side of the upper frame 110, thereby being electrically connected to an external power source or load.

[0120] To this end, a through hole for the fixed contact 220 to penetrate and be coupled may be formed on the upper side of the upper frame 110 .

[0121] The lower frame 120 forms the lower side of the frame portion 100. A predetermined space is formed inside the lower frame 120. The core portion 300 may be accommodated in the inner space of the lower frame 120.

[0122] The lower frame 120 may be combined with the upper frame 110. An insulating plate 130 and a support plate 140 may be disposed in a space between the lower frame 120 and the upper frame 110.

[0123] The insulating plate 130 and the supporting plate 140 are configured to electrically and physically isolate the inner space of the upper frame 110 from the inner space of the lower frame 120 .

[0124] The insulating plate 130 is located between the upper frame 110 and the lower frame 120. The insulating plate 130 is configured to electrically isolate the upper frame 110 from the lower frame 120. To this end, the insulating plate 130 may be formed of an insulating material such as a synthetic resin.

[0125] The insulating plate 130 can prevent any conduction between the switch unit 200 , the movable contact unit 400 , and the arc path forming units 500 and 600 accommodated in the upper frame 110 and the core unit 300 accommodated in the lower frame 120 .

[0126] A through hole (not shown) is formed in the center of the insulating plate 130. The shaft 440 of the movable contact part 400 may be inserted and coupled to the through hole (not shown) so as to be movable in the up-down direction.

[0127] The support plate 140 is located at a lower side of the insulation plate 130. The insulation plate 130 may be supported by the support plate 140.

[0128] The support plate 140 is located between the upper frame 110 and the lower frame 120 .

[0129] The support plate 140 is configured to physically separate the upper frame 110 and the lower frame 120 , and is configured to support the insulating plate 130 .

[0130] The support plate 140 may be formed of a magnetic body, so that the support plate 140 may form a magnetic circuit together with the yoke 330 of the core part 300 . The magnetic circuit may form a driving force for moving the movable core 320 of the core part 300 toward the fixed core 310 .

[0131] A through hole (not shown) is formed at the center of the support plate 140. The shaft 440 may be coupled to the through hole (not shown) so as to be movable in the up-down direction.

[0132] Therefore, when the movable core 320 moves in a direction toward the fixed core 310 or a direction away from the fixed core 310 , the shaft 440 and the movable contact 430 connected to the shaft 440 may also move together in the same direction.

[0133] (2) Description of the Opening and Closing Unit 200

[0134] The switch unit 200 is configured to allow or block the flow of current according to the movement of the core unit 300. Specifically, the switch unit 200 can allow or block the flow of current by making the fixed contact 220 and the movable contact 430 contact or separate.

[0135] The opening and closing part 200 is accommodated in the inner space of the upper frame 110. The opening and closing part 200 may be electrically and physically separated from the core part 300 by using the insulating plate 130 and the support plate 140.

[0136] The switch unit 200 includes an arc chamber 210 , a fixed contact 220 , and a sealing member 230 .

[0137] Furthermore, arc path forming parts 500 and 600 may be provided outside the arc chamber 210. The arc path forming parts 500 and 600 may form a magnetic field for forming a path AP of the arc generated inside the arc chamber 210. This will be described in detail below.

[0138] The arc chamber 210 is configured to extinguish, in an internal space, an arc generated by the separation of the fixed contact 220 and the movable contact 430. Therefore, the arc chamber 210 may also be referred to as an "arc extinguishing unit".

[0139] The arc chamber 210 is configured to contain the fixed contact 220 and the movable contact 430 in a sealed manner. That is, the fixed contact 220 and the movable contact 430 are contained inside the arc chamber 210. Therefore, the arc generated by the separation of the fixed contact 220 and the movable contact 430 does not flow out to the outside at will.

[0140] The arc chamber 210 may be filled with arc extinguishing gas. The arc extinguishing gas may extinguish the generated arc and discharge it to the outside of the DC relay 10 through a predetermined path. For this purpose, a connecting hole (not shown) may be formed through the wall surrounding the inner space of the arc chamber 210.

[0141] The arc chamber 210 may be formed of an insulating material. Also, the arc chamber 210 may be formed of a material having high pressure resistance and high heat resistance. This is because the generated arc is a flow of high temperature and high pressure electrons. In one embodiment, the arc chamber 210 may be formed of a ceramic material.

[0142] A plurality of through holes may be formed on the upper side of the arc chamber 210. The fixed contacts 220 are respectively connected through the through holes.

[0143] In the illustrated embodiment, two fixed contacts 220 are provided, namely, a first fixed contact 220 a and a second fixed contact 220 b , so that two through holes formed on the upper side of the arc chamber 210 may also be formed.

[0144] If the fixed contact 220 penetrates and is coupled to the through hole, the through hole will be sealed. That is, the fixed contact 220 is tightly coupled to the through hole. Thus, the generated arc will not be discharged to the outside through the through hole.

[0145] The lower side of the arc chamber 210 may be open. The insulating plate 130 and the sealing member 230 are in contact with the lower side of the arc chamber 210. That is, the lower side of the arc chamber 210 is sealed by the insulating plate 130 and the sealing member 230.

[0146] Thus, the arc chamber 210 may be electrically and physically separated from the outer space of the upper frame 110 .

[0147] The extinguished arc in the arc chamber 210 is discharged to the outside of the DC relay 10 via a preset path. In one embodiment, the extinguished arc can be discharged to the outside of the arc chamber 210 via the communication hole (not shown).

[0148] The fixed contact 220 is configured to be in contact with or separated from the movable contact 430 , thereby connecting or disconnecting the current between the inside and the outside of the DC relay 10 .

[0149] Specifically, when the fixed contact 220 and the movable contact 430 are in contact, electricity can flow between the inside and outside of the DC relay 10. On the contrary, when the fixed contact 220 and the movable contact 430 are separated, electricity flow between the inside and outside of the DC relay 10 is blocked.

[0150] As can be determined from the name, the fixed contact 220 does not move. That is, the fixed contact 220 is fixedly coupled to the upper frame 110 and the arc chamber 210. Therefore, contact and separation between the fixed contact 220 and the movable contact 430 are achieved by the movement of the movable contact 430.

[0151] One end portion of the fixed contact 220, ie, the upper end portion in the illustrated embodiment, is exposed to the outside of the upper frame 110. A power source or a load is electrically connected to the one end portion.

[0152] A plurality of fixed contacts 220 may be provided. In the illustrated embodiment, two fixed contacts 220 are provided, namely, a first fixed contact 220 a on the left and a second fixed contact 220 b on the right.

[0153] The first fixed contact 220a is located to one side, that is, to the left side in the illustrated embodiment, from the center in the extending direction of the movable contact 430. The second fixed contact 220b is located to the other side, that is, to the right side in the illustrated embodiment, from the center in the extending direction of the movable contact 430.

[0154] One of the first and second fixed contacts 220a and 220b may be electrically connected to a power source, and the other of the first and second fixed contacts 220a and 220b may be electrically connected to a load.

[0155] The DC relay 10 of the embodiment of the present invention can form an arc path AP regardless of the direction of the power source or load connected to the fixed contact 220. This is achieved by the arc path forming parts 500 and 600, which will be described in detail later.

[0156] The other end of the fixed contact 220 , ie, the lower end in the illustrated embodiment, extends toward the movable contact 430 .

[0157] When the movable contact 430 moves toward the fixed contact 220, that is, upward in the illustrated embodiment, the lower end portion contacts the movable contact 430. Thus, the DC relay 10 can be energized both outside and inside.

[0158] The lower end of the fixed contact 220 is located inside the arc chamber 210 .

[0159] When the control power is turned off, the movable contact 430 is separated from the fixed contact 220 by the elastic force of the return spring 360 .

[0160] At this time, as the fixed contact 220 and the movable contact 430 are separated, an arc is generated between the fixed contact 220 and the movable contact 430. The generated arc is extinguished by the arc extinguishing gas inside the arc chamber 210 and discharged to the outside along the path formed by the arc path forming parts 500 and 600.

[0161] The sealing member 230 is configured to block any communication between the arc chamber 210 and the space inside the upper frame 110. The sealing member 230 seals the lower side of the arc chamber 210 together with the insulating plate 130 and the support plate 140.

[0162] Specifically, the upper side of the sealing member 230 is coupled to the lower side of the arc chamber 210 . In addition, the radial inner side of the sealing member 230 is coupled to the outer periphery of the insulating plate 130 , and the lower side of the sealing member 230 is coupled to the support plate 140 .

[0163] Thus, the arc generated in the arc chamber 210 and the arc extinguished by the arc extinguishing gas do not flow out to the inner space of the upper frame 110 at will.

[0164] Also, the sealing member 230 may be configured to block any communication between the internal space of the cylinder 370 and the internal space of the frame portion 100 .

[0165] (3) Description of the core portion 300

[0166] The core part 300 is configured to move the movable contact part 400 upward as the control power is applied, and to move the movable contact part 400 downward again when the control power is released.

[0167] The core part 300 is electrically connected to an external control power source (not shown) so as to receive the control power source.

[0168] The core part 300 is located at the lower side of the opening and closing part 200. And, the core part 300 is accommodated inside the lower frame 120. The core part 300 and the opening and closing part 200 may be separated electrically and physically by the insulating plate 130 and the supporting plate 140.

[0169] The movable contact part 400 is located between the core part 300 and the switch part 200. The movable contact part 400 can be moved by the driving force applied by the core part 300. As a result, the movable contact 430 and the fixed contact 220 come into contact, so that the DC relay 10 can be energized.

[0170] The core portion 300 includes a fixed core 310 , a movable core 320 , a yoke 330 , a bobbin 340 , a coil 350 , a return spring 360 , and a cylinder 370 .

[0171] The fixed core 310 is magnetized by the magnetic field generated by the coil 350 to generate electromagnetic attraction. Under the action of the electromagnetic attraction, the movable core 320 moves toward the fixed core 310 ( Figure 3 in the upper direction).

[0172] The fixed core 310 does not move. That is, the fixed core 310 is fixedly coupled to the support plate 140 and the cylinder 370 .

[0173] The fixed core 310 can be configured in any form that can be magnetized by a magnetic field to generate an electromagnetic force. In one embodiment, the fixed core 310 can be configured by a permanent magnet or an electromagnet.

[0174] The fixed core 310 is partially accommodated in the upper space inside the cylinder 370. In addition, the outer periphery of the fixed core 310 is configured to contact the inner periphery of the cylinder 370.

[0175] The fixed core 310 is located between the support plate 140 and the movable core 320 .

[0176] A through hole (not shown) is formed in the center of the fixed core 310. The shaft 440 is inserted and coupled to the through hole (not shown) so as to be movable up and down.

[0177] The fixed core 310 is provided at a predetermined distance from the movable core 320. Therefore, the distance that the movable core 320 can move toward the fixed core 310 can be limited to the predetermined distance. Thus, the predetermined distance can be defined as the "movement distance of the movable core 320".

[0178] One end of the return spring 360, ie, the upper end in the illustrated embodiment, contacts the lower side of the fixed core 310. When the fixed core 310 is magnetized to move the movable core 320 upward, the return spring 360 is compressed and a restoring force is stored.

[0179] Thus, when the application of the control power is released to end the magnetization of the fixed core 310 , the movable core 320 can be restored to the lower side again by the restoring force.

[0180] The movable core 320 is configured to move toward the fixed core 310 under the action of the electromagnetic attraction generated by the fixed core 310 when a control power source is applied.

[0181] As the movable core 320 moves, the shaft 440 coupled to the movable core 320 moves toward the fixed core 310, that is, moves upward in the illustrated embodiment. Also, as the shaft 440 moves, the movable contact part 400 coupled to the shaft 440 moves upward.

[0182] As a result, the fixed contact 220 and the movable contact 430 come into contact with each other, so that the DC relay 10 can be energized by an external power source or load.

[0183] The movable core 320 may be configured in any form that can receive the attractive force generated by the electromagnetic force. In one embodiment, the movable core 320 may be formed of a magnetic material, or may be configured of a permanent magnet or an electromagnet.

[0184] The movable core 320 is accommodated in the cylinder 370. In addition, the movable core 320 can move in the cylinder 370 along the extension direction of the cylinder 370, that is, along the up-down direction in the illustrated embodiment.

[0185] Specifically, the movable core 320 can move in a direction toward the fixed core 310 and a direction away from the fixed core 310 .

[0186] The movable core 320 is coupled to the shaft 440. The movable core 320 can move integrally with the shaft 440. When the movable core 320 moves upward or downward, the shaft 440 also moves upward or downward. As a result, the movable contact 430 also moves upward or downward.

[0187] The movable core 320 is located below the fixed core 310. The movable core 320 is separated from the fixed core 310 by a predetermined distance. As described above, the predetermined distance is a distance that the movable core 320 can move in the up-down direction.

[0188] The movable core 320 is formed to extend in one direction. A hollow portion extending in the one direction is formed inside the movable core 320, and the hollow portion is formed to be recessed by a predetermined distance. The return spring 360 and the lower side of the shaft 440 penetrating and coupled to the return spring 360 are partially accommodated in the hollow portion.

[0189] A through hole is formed at the lower side of the hollow portion and penetrates along the one direction. The hollow portion is communicated with the through hole. The lower end of the shaft 440 inserted into the hollow portion can move toward the through hole.

[0190] A space portion recessed by a predetermined distance is formed at the lower end of the movable core 320. The space portion is communicated with the through hole. The lower head of the shaft 440 is located in the space portion.

[0191] When the control power is applied, the yoke 330 forms a magnetic circuit. The magnetic circuit formed by the yoke 330 may be configured to adjust the direction of the magnetic field formed by the coil 350.

[0192] Thus, when the control power is applied, the coil 350 can generate a magnetic field in a direction to move the movable core 320 toward the fixed core 310. The yoke 330 can be formed of a conductive material that can pass electricity.

[0193] The yoke 330 is accommodated in the lower frame 120. The yoke 330 is configured to surround the coil 350. The coil 350 may be accommodated in the yoke 330 and spaced apart from the inner peripheral surface of the yoke 330 by a predetermined distance.

[0194] The bobbin 340 is accommodated inside the yoke 330. That is, the yoke 330, the coil 350, and the bobbin 340 around which the coil 350 is wound are sequentially arranged in a direction from the outer periphery of the lower frame 120 toward the radial inner side.

[0195] The upper side of the yoke 330 is in contact with the support plate 140. Also, the outer circumference of the yoke 330 may be in contact with the inner circumference of the lower frame 120, or may be disposed at a predetermined distance from the inner circumference of the lower frame 120.

[0196] The coil 350 is wound around the bobbin 340 . The bobbin 340 is accommodated inside the yoke 330 .

[0197] The bobbin 340 may include: a flat plate-shaped upper portion and a lower portion; and a cylindrical column portion extending in one direction and connecting the upper portion and the lower portion. That is, the bobbin 340 may be in the shape of a bobbin.

[0198] The upper portion of the bobbin 340 contacts the lower side of the support plate 140. The coil 350 is wound around the column of the bobbin 340. The thickness of the coil 350 may be the same as or smaller than the diameter of the upper and lower portions of the bobbin 340.

[0199] A hollow portion extending in one direction is formed through the column of the bobbin 340 . The cylinder 370 may be accommodated in the hollow portion. The column of the bobbin 340 may be configured to have the same central axis as the fixed core 310 , the movable core 320 , and the shaft 440 .

[0200] The coil 350 generates a magnetic field by applying a control power source. The fixed core 310 is magnetized by the magnetic field generated by the coil 350 , thereby applying an electromagnetic attraction force to the movable core 320 .

[0201] The coil 350 is wound around the bobbin 340 . Specifically, the coil 350 is wound around the column portion of the bobbin 340 and is stacked along the radially outer side of the column portion. The coil 350 is accommodated inside the yoke 330 .

[0202] When the control power is applied, the coil 350 generates a magnetic field. At this time, the strength or direction of the magnetic field generated by the coil 350 can be controlled by the yoke 330. Under the effect of the magnetic field generated by the coil 350, the fixed core 310 is magnetized.

[0203] When the fixed core 310 is magnetized, the movable core 320 receives an electromagnetic force, that is, an attractive force, in the direction of the fixed core 310. As a result, the movable core 320 moves in the direction of the fixed core 310, that is, moves upward in the illustrated embodiment.

[0204] The return spring 360 provides a restoring force for returning the movable core 320 to an original position when application of the control power is released after the movable core 320 moves toward the fixed core 310 .

[0205] As the movable core 320 moves toward the fixed core 310, the return spring 360 is compressed and stores a restoring force. At this time, preferably, the stored restoring force is smaller than the electromagnetic attraction acting on the movable core 320 due to the magnetization of the fixed core 310. This is to prevent the movable core 320 from arbitrarily returning to the original position due to the return spring 360 during the application of the control power.

[0206] When the control power supply is released, the movable core 320 is subjected to the restoring force generated by the return spring 360. Of course, the gravity generated by the empty weight of the movable core 320 may also act on the movable core 320. Thus, the movable core 320 can move away from the fixed core 310 and return to the original position.

[0207] The return spring 360 may be configured in any form that can store the restoring force by deforming its shape and can transmit the restoring force to the outside by returning to its original shape. In one embodiment, the return spring 360 may be formed of a coil spring.

[0208] The shaft 440 penetrates and is coupled to the return spring 360. In a state coupled to the return spring 360, the shaft 440 can move in the up-down direction regardless of the shape change of the return spring 360.

[0209] The return spring 360 is accommodated in a hollow portion formed on the upper side of the movable core 320. In addition, the end of the return spring 360 facing the fixed core 310, that is, the upper end in the illustrated embodiment, is accommodated in a hollow portion formed on the lower side of the fixed core 310.

[0210] The cylinder 370 is used to accommodate the fixed core 310, the movable core 320, the return spring 360, and the shaft 440. The movable core 320 and the shaft 440 can move in the cylinder 370 in the upper and lower directions.

[0211] The cylinder 370 is located in a hollow portion formed on the column portion of the bobbin 340 . An upper end portion of the cylinder 370 contacts a lower side surface of the support plate 140 .

[0212] The side surface of the cylinder 370 contacts the inner circumferential surface of the column portion of the bobbin 340. The upper opening of the cylinder 370 may be sealed by the fixed core 310. The lower side surface of the cylinder 370 may contact the inner surface of the lower frame 120.

[0213] (4) Description of movable contact part 400

[0214] The movable contact part 400 includes a movable contact 430 and a component for moving the movable contact 430. The DC relay 10 can be energized with an external power source or load by using the movable contact part 400.

[0215] The movable contact part 400 is accommodated in the internal space of the upper frame 110. Also, the movable contact part 400 may be accommodated in the arc chamber 210 in a manner capable of moving up and down.

[0216] The fixed contact 220 is located above the movable contact part 400. The movable contact part 400 is accommodated inside the arc chamber 210 so as to be movable in a direction toward the fixed contact 220 and a direction away from the fixed contact 220.

[0217] The core part 300 is located at the lower side of the movable contact part 400. The movement of the movable contact part 400 can be achieved by the movement of the movable core 320.

[0218] The movable contact part 400 includes a housing 410 , a cover 420 , a movable contact 430 , a shaft 440 , and an elastic part 450 .

[0219] The housing 410 accommodates the movable contact 430 and the elastic portion 450 that elastically supports the movable contact 430 .

[0220] In the illustrated embodiment, one side of the housing 410 and the other side facing the housing 410 are open (see Figure 5 ). The movable contact 430 may be inserted through the open portion.

[0221] The side surfaces of the housing 410 that are not opened may be configured to cover the accommodated movable contact 430 .

[0222] A cover 420 is provided on the upper side of the housing 410 . The cover 420 is configured to surround the upper side surface of the movable contact 430 accommodated in the housing 410 .

[0223] The housing 410 and the cover 420 are preferably formed of an insulating material to prevent unintended electricity. In one embodiment, the housing 410 and the cover 420 can be formed of a synthetic resin or the like.

[0224] The lower side of the housing 410 is connected to the shaft 440. When the movable core 320 connected to the shaft 440 moves upward or downward, the housing 410 and the movable contact 430 accommodated in the housing 410 may also move upward or downward.

[0225] The housing 410 and the cover 420 may be combined by any member. In one embodiment, the housing 410 and the cover 420 may be combined by a fastening member (not shown) such as a bolt or a nut.

[0226] As the control power is applied, the movable contact 430 contacts the fixed contact 220, thereby energizing the DC relay 10 with the external power supply and load. In addition, when the control power is released, the movable contact 430 separates from the fixed contact 220, thereby not energizing the DC relay 10 with the external power supply and load.

[0227] The movable contact 430 is arranged adjacent to the fixed contact 220 .

[0228] The upper side of the movable contact 430 is partially covered by the cover 420. In one embodiment, a portion of the upper side of the movable contact 430 may be in contact with the lower side of the cover 420.

[0229] The lower side of the movable contact 430 is elastically supported by the elastic portion 450. The elastic portion 450 can elastically support the movable contact 430 in a state of being compressed by a predetermined distance to prevent the movable contact 430 from moving downward arbitrarily.

[0230] The movable contact 430 is formed to extend in one direction, and in the illustrated embodiment, extends in the left-right direction. That is, the movable contact 430 is formed to be longer than its width. Therefore, both side ends of the movable contact 430 in the one direction accommodated in the housing 410 are exposed to the outside of the housing 410.

[0231] Contact protrusions that protrude upward by a predetermined distance may be formed at the two side ends, and the fixed contacts 220 are in contact with the contact protrusions.

[0232] The contact protrusions may be formed at positions corresponding to the fixed contacts 220 a and 220 b , thereby reducing the moving distance of the movable contact 430 and improving the contact reliability between the fixed contact 220 and the movable contact 430 .

[0233] The width of the movable contact 430 may be the same as the distance between the side surfaces of the housing 410. That is, when the movable contact 430 is accommodated in the housing 410, both side surfaces of the movable contact 430 in the width direction may contact the inner surfaces of the side surfaces of the housing 410.

[0234] Thus, the state where the movable contact 430 is accommodated in the housing 410 can be stably maintained.

[0235] The shaft 440 transmits the driving force generated by the operation of the core part 300 to the movable contact part 400. Specifically, the shaft 440 is connected to the movable core 320 and the movable contact 430. When the movable core 320 moves upward or downward, the movable contact 430 can also move upward or downward under the action of the shaft 440.

[0236] The shaft 440 is formed to extend in one direction, and in the illustrated embodiment, is formed to extend in the up-down direction.

[0237] The lower end of the shaft 440 is inserted and coupled to the movable core 320. When the movable core 320 moves in the up-down direction, the shaft 440 can move in the up-down direction together with the movable core 320.

[0238] The main body of the shaft 440 is penetrated and coupled to the fixed core 310 in a manner that it can move up and down. The return spring 360 is penetrated and coupled to the main body of the shaft 440 .

[0239] The upper end portion of the shaft 440 is coupled to the housing 410. When the movable core 320 moves, the shaft 440 and the housing 410 may move together.

[0240] The diameters of the upper and lower ends of the shaft 440 may be formed to be larger than the diameter of the main body of the shaft 440. Thus, the shaft 440 may stably maintain a combined state with the housing 410 and the movable core 320.

[0241] The elastic portion 450 elastically supports the movable contact 430. When the movable contact 430 is in contact with the fixed contact 220, the movable contact 430 tends to be separated from the fixed contact 220 due to the electromagnetic repulsive force.

[0242] At this time, the elastic portion 450 is configured to elastically support the movable contact 430 , thereby preventing the movable contact 430 from being arbitrarily separated from the fixed contact 220 .

[0243] The elastic part 450 may be configured in any form that can store a restoring force by deforming its shape and provide the stored restoring force to other components. In one embodiment, the elastic part 450 may be configured as a coil spring.

[0244] One end of the elastic portion 450 facing the movable contact 430 contacts the lower side of the movable contact 430 , and the other end of the elastic portion 450 facing the one end contacts the upper side of the housing 410 .

[0245] The elastic part 450 can elastically support the movable contact 430 in a state where the elastic part 450 is compressed by a predetermined distance and a restoring force is stored. Therefore, even if an electromagnetic repulsive force is generated between the movable contact 430 and the fixed contact 220 , the movable contact 430 does not move arbitrarily.

[0246] In order to achieve stable connection of the elastic part 450 , a protrusion (not shown) inserted into the elastic part 450 may be formed on the lower side of the movable contact 430 . Similarly, a protrusion (not shown) inserted into the elastic part 450 may be formed on the upper side of the housing 410 .

[0247] 3. Description of the arc path forming portions 500 and 600 of the embodiments of the present invention

[0248] The DC relay 10 of the embodiment of the present invention includes arc path forming parts 500 and 600. The arc path forming parts 500 and 600 form an electromagnetic field inside the arc chamber 210. The electromagnetic field forms an electromagnetic force together with the current flowing in the DC relay 10. Thus, a path in which the arc flows along the direction of the electromagnetic force, i.e., an arc path, can be formed.

[0249] Below, refer to Figures 4 to 9 The arc path forming portions 500 and 600 according to the respective embodiments of the present invention will be described in detail.

[0250] exist Figure 4 and Figure 5 In the illustrated embodiment, the arc path forming portions 500, 600 are located outside the arc chamber 210. The arc path forming portions 500, 600 are configured to at least partially surround the arc chamber 210.

[0251] exist Figures 6 to 9 In the illustrated embodiment, it should be understood that illustration of the arc chamber 210 is omitted.

[0252] The arc path forming parts 500 and 600 can form a magnetic field inside the arc chamber 210. Under the effect of the magnetic field, a path for discharging the arc, that is, an arc path AP is formed.

[0253] (1) Description of the Arc Path Forming Section 500 of One Embodiment of the Present Invention

[0254] Below, refer to Figure 6 and Figure 7 The arc path forming portion 500 according to one embodiment of the present invention will be described in detail.

[0255] In the illustrated embodiment, the arc path forming portion 500 includes a magnet frame 510 and a magnet portion 520 .

[0256] The magnet frame 510 forms a frame of the arc path forming portion 500. The magnet frame 510 is provided with a magnet portion 520. In one embodiment, the magnet portion 520 may be combined with the magnet frame 510.

[0257] The magnet frame 510 has a rectangular cross section extending in one direction, that is, in the left-right direction in the illustrated embodiment. The shape of the magnet frame 510 may be changed according to the shapes of the upper frame 110 and the arc chamber 210 .

[0258] The magnet frame 510 includes a first surface 511 , a second surface 512 , a third surface 513 , a fourth surface 514 , an arc discharge hole 515 , a space portion 516 , and rib portions 517 .

[0259] The first surface 511 , the second surface 512 , the third surface 513 , and the fourth surface 514 form the outer peripheral surface of the magnet frame 510 . That is, the first surface 511 , the second surface 512 , the third surface 513 , and the fourth surface 514 function as the wall of the magnet frame 510 .

[0260] The outer sides of the first surface 511, the second surface 512, the third surface 513 and the fourth surface 514 may contact or be fixedly connected to the inner surface of the upper frame 110. In addition, the magnet part 520 may be located inside the first surface 511, the second surface 512, the third surface 513 and the fourth surface 514.

[0261] In the illustrated embodiment, the first surface 511 forms a rear side surface, and the second surface 512 forms a front side surface and faces the first surface 511 .

[0262] The third surface 513 forms the left side surface. The fourth surface 514 forms the right side surface and faces the third surface 513 .

[0263] The first surface 511 is continuously formed with the third surface 513 and the fourth surface 514. The first surface 511 may form a specified angle with the third surface 513 and the fourth surface 514 and be combined with them. In one embodiment, the specified angle may be a right angle.

[0264] The second surface 512 is continuously formed with the third surface 513 and the fourth surface 514. The second surface 512 may form a specified angle with the third surface 513 and the fourth surface 514 and be combined therewith. In one embodiment, the specified angle may be a right angle.

[0265] Each of the corners connecting the first to fourth surfaces 511 to 514 to each other may be chamfered (tapered).

[0266] The first magnet part 521 may be coupled to the inner side of the first surface 511 , that is, the side of the first surface 511 facing the second surface 512 . Also, the second magnet part 522 may be coupled to the inner side of the second surface 512 , that is, the side of the second surface 512 facing the first surface 511 .

[0267] exist Figure 6 In the illustrated embodiment, a third magnet portion 523 may be combined on the inner side of the third surface 513, that is, on the side of the third surface 513 facing the fourth surface 514. Figure 7 In the illustrated embodiment, a third magnet portion 523 may be combined on the inner side of the fourth surface 514 , that is, on the side of the fourth surface 514 facing the third surface 513 .

[0268] That is, as will be described later, the third magnet portion 523 may be coupled to one of the third surface 513 and the fourth surface 514 .

[0269] In order to connect the respective surfaces 511 , 512 , 513 , and 514 to the magnet portion 520 , a fastening member (not shown) may be provided.

[0270] An arc discharge hole 515 is formed through one or more of the first surface 511 and the second surface 512 .

[0271] The arc discharge hole 515 is a passage for the arc extinguished and discharged in the arc chamber 210 to be discharged to the inner space of the upper frame 110. The arc discharge hole 515 connects the space portion 516 of the magnet frame 510 and the space of the upper frame 110.

[0272] In the illustrated embodiment, the arc discharge hole 515 is formed on the first surface 511 and the second surface 512. Also, the arc discharge hole 515 may be formed in the middle portion of the first surface 511 and the second surface 512 in the extending direction, ie, the left-right direction.

[0273] A space surrounded by the first to fourth surfaces 511 to 514 may be defined as a space portion 516 .

[0274] The fixed contact 220 and the movable contact 430 are accommodated in the space portion 516. Figure 4 As shown, the arc chamber 210 is accommodated in the space portion 516 .

[0275] The movable contact 430 , while being accommodated in the space portion 516 , can move in a direction toward the fixed contact 220 or in a direction away from the fixed contact 220 .

[0276] Furthermore, a path AP of the arc generated in the arc chamber 210 is formed in the space portion 516 . This is achieved by the magnetic field formed by the magnet portion 520 .

[0277] The central portion of the space portion 516 may be defined as a central portion C. Straight line distances from respective corners connected to each other from the first surface 511 to the fourth surface 514 to the central portion C may be formed to be the same.

[0278] The center portion C is located between the first fixed contact 220a and the second fixed contact 220b. Also, the center portion of the movable contact portion 400 is located vertically below the center portion C. That is, the center portions of the housing 410, the cover 420, the movable contact 430, the shaft 440, and the elastic portion 450 are located vertically below the center portion C.

[0279] Therefore, when the generated arc moves toward the center portion C, a plurality of the structural elements may be damaged. In order to prevent such a situation, the arc path forming portion 500 of the present embodiment includes a magnet portion 520 .

[0280] On the other hand, the arc paths AP formed by the arc path forming part 500 of the embodiment of the present invention do not overlap each other. However, in order to prevent the arc path AP from being distorted due to unpredictable factors, the arc path forming part 500 of the embodiment of the present invention includes a rib 517 .

[0281] The ribs 517 are used to separate the paths AP of the arcs so that the paths AP of the arcs formed near the first fixed contact 220 a and the second fixed contact 220 b do not overlap with each other.

[0282] A plurality of ribs 517 may be provided. In the illustrated embodiment, the ribs 517 are formed to protrude from the first surface 511 and the second surface 512 toward the space 516 by a predetermined length.

[0283] The rib 517 is located between the first fixed contact 220 a and the second fixed contact 220 b. In one embodiment, the rib 517 may be located at a central portion of the first surface 511 and the second surface 512 .

[0284] When the arc paths AP advance toward each other, the extended lengths thereof may be blocked by the ribs 517. Therefore, the arc paths AP formed inside the arc path forming portion 500 may be prevented from overlapping each other.

[0285] The magnet part 520 forms a magnetic field inside the space part 516. The magnetic field formed by the magnet part 520 generates an electromagnetic force together with the current flowing along the fixed contact 220 and the movable contact 430. Thus, the arc path AP can be formed along the direction of the electromagnetic force. It can be understood that the electromagnetic force is a Lorentz force.

[0286] The magnet parts 520 may form a magnetic field between the magnet parts 520 adjacent to each other, or each magnet part 520 may form a magnetic field by itself.

[0287] The magnet part 520 may be formed in any form that has magnetism itself or can be made magnetism by application of electric current, etc. In one embodiment, the magnet part 520 may be formed of a permanent magnet or an electromagnet, etc.

[0288] The magnet part 520 is combined with the magnet frame 510. In order to realize the combination of the magnet part 520 and the magnet frame 510, a fastening member (not shown) may be provided.

[0289] In the illustrated embodiment, the magnet part 520 extends in one direction and has a rectangular parallelepiped shape with a rectangular cross section. The magnet part 520 may be formed in any shape that can form a magnetic field.

[0290] A plurality of magnet parts 520 may be provided. In the illustrated embodiment, three magnet parts 520 are provided, but the number may be changed.

[0291] The magnet portion 520 includes a first magnet portion 521 , a second magnet portion 522 and a third magnet portion 523 .

[0292] The first magnet portion 521 forms a magnetic field together with the second magnet portion 522 or the third magnet portion 523. Alternatively, the first magnet portion 521 itself may form a magnetic field.

[0293] The first magnet portion 521 is disposed inside the first surface 511 and biased toward one side in the direction in which the first surface 511 extends. At this time, the first magnet portion 521 is biased toward the same side as the second magnet portion 522 and is disposed facing each other.

[0294] exist Figure 6 In the illustrated embodiment, the first magnet portion 521 is disposed on the right side of the inner side of the first surface 511. That is, the first magnet portion 521 is located on the right side of the arc discharge hole 515.

[0295] exist Figure 7 In the embodiment of FIG. 5 , the first magnet portion 521 is disposed on the inner side of the first surface 511 and biased to the left. That is, the first magnet portion 521 is located on the left side of the arc discharge hole 515 .

[0296] In various embodiments, the first magnet portion 521 may form a magnetic field together with the second magnet portion 522 or the third magnet portion 523 .

[0297] The first magnet portion 521 and the second magnet portion 522 are arranged to face each other. Specifically, the first magnet portion 521 faces the second magnet portion 522 with the space portion 516 interposed therebetween.

[0298] In one embodiment, an imaginary straight line connecting the center of the first magnet portion 521 in the extending direction and the center of the second magnet portion 522 in the extending direction may be perpendicular to the first surface 511 and the second surface 512 .

[0299] The first magnet portion 521 includes a first facing surface 521 a and a first opposite surface 521 b .

[0300] The first facing surface 521 a is defined as a side surface of the first magnet portion 521 facing the space portion 516 . In other words, the first facing surface 521 a may be defined as a side surface of the first magnet portion 521 facing the second magnet portion 522 .

[0301] The first opposite surface 521b is defined as the other side surface of the first magnet portion 521 facing the first surface 511. In other words, the first opposite surface 521b may be defined as the other side surface of the first magnet portion 521 facing the first facing surface 521a.

[0302] The first facing surface 521a and the first opposite surface 521b are configured to have different polarities. That is, the first facing surface 521a can be magnetized to one of the N pole and the S pole, and the first opposite surface 521b can be magnetized to the other of the N pole and the S pole.

[0303] Thus, the first magnet portion 521 itself forms a magnetic field that travels from one of the first facing surface 521 a and the first opposite surface 521 b to the other.

[0304] In this embodiment, the polarity of the first facing surface 521a may be the same as the polarity of the second facing surface 522a of the second magnet portion 522. Thus, a magnetic field in a direction of mutual repulsion is formed between the first magnet portion 521 and the second magnet portion 522.

[0305] Furthermore, in this embodiment, the polarity of the first facing surface 521a may be the same as the polarity of the third facing surface 523a of the third magnet portion 523. Thus, a magnetic field in a direction of mutual repulsion is also formed between the first magnet portion 521 and the third magnet portion 523.

[0306] The second magnet portion 522 forms a magnetic field together with the first magnet portion 521 or the third magnet portion 523. In addition, the second magnet portion 522 itself may also form a magnetic field.

[0307] The second magnet portion 522 is disposed inside the second surface 512 and offset to one side in the direction in which the second surface 512 extends. At this time, the second magnet portion 522 is disposed offset to the same side as the first magnet portion 521 and is disposed facing each other.

[0308] exist Figure 6In the illustrated embodiment, the second magnet portion 522 is disposed on the inner side of the second surface 512 and biased to the left. That is, the second magnet portion 522 is located on the left side of the arc discharge hole 515.

[0309] exist Figure 7 In the illustrated embodiment, the second magnet portion 522 is disposed on the right side of the inner side of the second surface 512. That is, the second magnet portion 522 is located on the right side of the arc discharge hole 515.

[0310] In various embodiments, the second magnet portion 522 may form a magnetic field together with the first magnet portion 521 or the third magnet portion 523 .

[0311] The second magnet portion 522 is disposed to face the first magnet portion 521. Specifically, the second magnet portion 522 faces the first magnet portion 521 with the space portion 516 interposed therebetween.

[0312] In one embodiment, an imaginary straight line connecting the center of the second magnet portion 522 in the extending direction and the center of the first magnet portion 521 in the extending direction may be perpendicular to the second surface 512 and the first surface 511 .

[0313] The second magnet portion 522 includes a second facing surface 522 a and a second opposite surface 522 b .

[0314] The second facing surface 522 a is defined as a side surface of the second magnet portion 522 that faces the space portion 516 . In other words, the second facing surface 522 a may be defined as a side surface of the second magnet portion 522 that faces the first magnet portion 521 .

[0315] The second opposite surface 522b is defined as the other side surface of the second magnet portion 522 facing the second surface 512. In other words, the second opposite surface 522b may be defined as a side surface of the second magnet portion 522 facing the second facing surface 522a.

[0316] The second facing surface 522a and the second opposite surface 522b are configured to have different polarities. That is, the second facing surface 522a can be magnetized to one of the N pole and the S pole, and the second opposite surface 522b can be magnetized to the other of the N pole and the S pole.

[0317] Thus, the second magnet portion 522 itself forms a magnetic field that travels from one of the second facing surface 522 a and the second opposite surface 522 b to the other.

[0318] In this embodiment, the polarity of the second facing surface 522a may be the same as the polarity of the first facing surface 521a of the first magnet portion 521. Thus, a magnetic field in a direction of mutual repulsion is formed between the first magnet portion 521 and the second magnet portion 522.

[0319] Furthermore, in this embodiment, the polarity of the second facing surface 522a may be the same as the polarity of the third facing surface 523a of the third magnet portion 523. Thus, a magnetic field in a direction of mutual repulsion is also formed between the first magnet portion 521 and the third magnet portion 523.

[0320] In this embodiment, the positional relationship between the first magnet portion 521 and the second magnet portion 522 can be described by using the positional relationship between the first magnet portion 521 and the second magnet portion 522 and the fixed contact 220 .

[0321] That is, in Figure 6 In the illustrated embodiment, the first magnet portion 521 and the second magnet portion 522 are disposed adjacent to any one of the fixed contacts 220, namely the second fixed contact 220b on the right side. The first magnet portion 521 and the second magnet portion 522 are disposed to surround the rear side and the front side of the second fixed contact 220b, respectively.

[0322] In the embodiment, the third magnet portion 523 is disposed adjacent to the other fixed contact 220 , ie, the first fixed contact 220 a located on the left side.

[0323] exist Figure 7 In the illustrated embodiment, the first magnet portion 521 and the second magnet portion 522 are disposed adjacent to any one of the fixed contacts 220, namely the first fixed contact 220a on the left side. The first magnet portion 521 and the second magnet portion 522 are disposed to surround the rear side and the front side of the first fixed contact 220a, respectively.

[0324] In the embodiment, the third magnet portion 523 is disposed adjacent to another fixed contact 220 , ie, the second fixed contact 220 b located on the right side.

[0325] The third magnet portion 523 forms a magnetic field together with the first magnet portion 521 or the second magnet portion 522. In addition, the third magnet portion 523 itself may also form a magnetic field.

[0326] The magnetic force of the third magnet portion 523 may be greater than the magnetic force of the first magnet portion 521 or the second magnet portion 522 .

[0327] In one embodiment, the magnetic force of the third magnet portion 523 may be more than twice as large as the magnetic force of each of the first magnet portion 521 and the second magnet portion 522 .

[0328] Thus, even if only the third magnet portion 523 is disposed adjacent to one of the fixed contacts 220 , a magnetic field having a sufficiently strong intensity for forming the arc path AP can be formed.

[0329] The third magnet portion 523 is located in the opposite direction to the first magnet portion 521 or the second magnet portion 522. In other words, the third magnet portion 523 is located on the third surface 513 and the fourth surface 514 which is farther from the first magnet portion 521 or the second magnet portion 522.

[0330] exist Figure 6 In the illustrated embodiment, the third magnet portion 523 is located inside the third surface 513. Also, the third magnet portion 523 is located in the middle portion of the third surface 513 in the front-rear direction.

[0331] exist Figure 7 In the illustrated embodiment, the third magnet portion 523 is located inside the fourth surface 514. Also, the third magnet portion 523 is located in the middle portion of the fourth surface 514 in the front-to-back direction.

[0332] The third magnet portion 523 is disposed at a predetermined distance from the first magnet portion 521 and the second magnet portion 522. In one embodiment, the distance between the third magnet portion 523 and the first magnet portion 521 may be the same as the distance between the third magnet portion 523 and the second magnet portion 522.

[0333] In other words, the distance between the center of the third magnet portion 523 in the extended length direction and the center of the first magnet portion 521 in the extended length direction can be the same as the distance between the center of the third magnet portion 523 in the extended length direction and the center of the second magnet portion 522 in the extended length direction.

[0334] In this embodiment, the position of the third magnet portion 523 may be explained by using the positional relationship between the third magnet portion 523 and the fixed contact 220 .

[0335] That is, in Figure 6 In the illustrated embodiment, the third magnet portion 523 is disposed adjacent to any one of the fixed contacts 220, namely, the first fixed contact 220a located on the left side. The third magnet portion 523 is disposed to surround the left side of the first fixed contact 220a.

[0336] In the embodiment, the first magnet portion 521 and the second magnet portion 522 are disposed adjacent to the other fixed contact 220 , ie, the second fixed contact 220 b located on the right side.

[0337] exist Figure 7 In the illustrated embodiment, the third magnet portion 523 is disposed adjacent to any one of the fixed contacts 220, namely, the second fixed contact 220b located on the right side. The third magnet portion 523 is disposed to surround the right side of the second fixed contact 220b.

[0338] In the embodiment, the first magnet portion 521 and the second magnet portion 522 are disposed adjacent to the other fixed contact 220 , ie, the first fixed contact 220 a located on the left side.

[0339] The third magnet portion 523 includes a third facing surface 523 a and a third opposite surface 523 b .

[0340] The third facing surface 523a is defined as a side surface of the third magnet portion 523 facing the space portion 516. In other words, the third facing surface 523a may be defined as a side surface of the third magnet portion 523 facing the first magnet portion 521 or the second magnet portion 522.

[0341] The third opposite surface 523b is defined as the other side of the third magnet portion 523 facing the third surface 513. In other words, the third opposite surface 523b may be defined as a side surface of the third magnet portion 523 facing the third facing surface 523a.

[0342] The third facing surface 523a and the third opposite surface 523b are configured to have different polarities, that is, the third facing surface 523a can be magnetized to one of the N pole and the S pole, and the third opposite surface 523b can be magnetized to the other of the N pole and the S pole.

[0343] Thus, the third magnet portion 523 itself forms a magnetic field that travels from one of the third facing surface 523 a and the third opposite surface 523 b to the other.

[0344] In this embodiment, the polarity of the third facing surface 523a may be the same as the polarity of the first facing surface 521a of the first magnet portion 521. Thus, a magnetic field in a direction of repelling each other is formed between the third magnet portion 523 and the first magnet portion 521.

[0345] Furthermore, the polarity of the third facing surface 523a may be configured to be the same as the polarity of the second facing surface 522a of the second magnet portion 522. Thus, a magnetic field in a direction of mutual repulsion is also formed between the third magnet portion 523 and the second magnet portion 522.

[0346] That is, in Figure 6 (a) and Figure 7 In the embodiment shown in (a), each of the facing surfaces 521a, 522a, and 523a is magnetized to the N pole. Figure 6 (b) and Figure 7 In the embodiment shown in (b), each of the facing surfaces 521a, 522a, and 523a is magnetized to the S pole.

[0347] As a result, the electromagnetic forces generated by the current passing through the magnetic field formed by the magnet part 520 are directed in different directions. This will be described in detail later.

[0348] (2) Description of the arc path forming portion 600 according to another embodiment of the present invention

[0349] Below, refer to Figure 8 and Fig. 9 An arc path forming portion 600 according to another embodiment of the present invention will be described in detail.

[0350] In the illustrated embodiment, the arc path forming portion 600 includes a magnet frame 610 and a magnet portion 620 .

[0351] The structure and function of the magnet frame 610 of this embodiment are the same as those of the magnet frame 510 of the above-mentioned embodiment. Therefore, the description of the magnet frame 610 will be replaced by the description of the magnet frame 510 described above.

[0352] Furthermore, the structure and function of the magnet part 620 of this embodiment are similar to those of the magnet part 520 of the above-mentioned embodiment, except that the polarities of the magnet parts 621, 622, and 623 are different.

[0353] Therefore, in the following description, the magnet portion 620 of this embodiment will be described mainly with respect to the differences from the magnet portion 520 of the above-described embodiment.

[0354] In this embodiment, the magnet portion 620 includes a first magnet portion 621 , a second magnet portion 622 and a third magnet portion 623 .

[0355] The structure and arrangement of the first magnet portion 621 are the same as those of the first magnet portion 521 in the above embodiment. The first magnet portion 621 and the second magnet portion 622 are arranged to face each other.

[0356] The first magnet portion 621 is disposed inside the first surface 611 and biased toward one side in the direction in which the first surface 611 extends. At this time, the first magnet portion 621 is disposed biased toward the same side as the second magnet portion 622 and faces each other.

[0357] exist Figure 8 In the illustrated embodiment, the first magnet portion 621 is located inside the first surface 611. Also, the first magnet portion 621 is located at a position biased to the right. In other words, the first magnet portion 621 is disposed adjacent to the second fixed contact 220b located on the right side.

[0358] exist Fig. 9 In the illustrated embodiment, the first magnet portion 621 is located inside the first surface 611. Also, the first magnet portion 621 is located at a position biased to the left. In other words, the first magnet portion 621 is disposed adjacent to the first fixed contact 220a located on the left side.

[0359] The first magnet portion 621 includes a first facing surface 621 a and a first opposite surface 621 b .

[0360] The first facing surface 621 a is defined as a side surface of the first magnet portion 621 facing the space portion 616 . In other words, the first facing surface 621 a may be defined as a side surface of the first magnet portion 621 facing the second magnet portion 622 .

[0361] The first opposite surface 621b is defined as the other side surface of the first magnet portion 621 facing the first surface 611. In other words, the first opposite surface 621b may be defined as the other side surface of the first magnet portion 621 facing the first facing surface 621a.

[0362] The first facing surface 621a and the first opposite surface 621b are configured to have different polarities. That is, the first facing surface 621a can be magnetized to one of the N pole and the S pole, while the first opposite surface 621b can be magnetized to the other of the N pole and the S pole.

[0363] Thus, the first magnet portion 621 itself forms a magnetic field that travels from one of the first facing surface 621 a and the first opposite surface 621 b to the other.

[0364] In this embodiment, the polarity of the first facing surface 621a may be the same as the polarity of the second facing surface 622a of the second magnet portion 622. Thus, a magnetic field in a direction of mutual repulsion is formed between the first magnet portion 621 and the second magnet portion 622.

[0365] In this embodiment, the polarity of the first facing surface 621a may be different from the polarity of the third facing surface 623a of the third magnet portion 623. Thus, a magnetic field in a direction that attracts each other is formed between the first magnet portion 621 and the third magnet portion 623.

[0366] exist Figure 8 (a) and Fig. 9 In the embodiment shown in (a), the first facing surface 621a and the second facing surface 622a are magnetized to the S pole. At this time, the third facing surface 623a is magnetized to the N pole.

[0367] exist Figure 8 (b) and Fig. 9 In the embodiment shown in (b), the first facing surface 621a and the second facing surface 622a are magnetized to the N pole. At this time, the third facing surface 623a is magnetized to the S pole.

[0368] The structure and arrangement of the second magnet portion 622 are the same as those of the second magnet portion 522 of the above embodiment. The second magnet portion 622 is arranged to face the first magnet portion 621 .

[0369] The second magnet portion 622 is disposed inside the second surface 612 and biased toward one side in the direction in which the second surface 612 extends. At this time, the second magnet portion 622 is disposed biased toward the same side as the first magnet portion 621 and faces each other.

[0370] exist Figure 8 In the illustrated embodiment, the second magnet portion 622 is located inside the second surface 612. Also, the second magnet portion 622 is located at a position biased to the right. In other words, the second magnet portion 622 is disposed adjacent to the second fixed contact 220b located on the right side.

[0371] exist Fig. 9 In the illustrated embodiment, the second magnet portion 622 is located inside the second surface 612. Also, the second magnet portion 622 is located at a position biased to the left. In other words, the second magnet portion 622 is disposed adjacent to the first fixed contact 220a located on the left side.

[0372] The second magnet portion 622 includes a second facing surface 622 a and a second opposite surface 622 b .

[0373] The second facing surface 622a is defined as a side surface of the second magnet portion 622 facing the space portion 616. In other words, the second facing surface 622a may be defined as a side surface of the second magnet portion 622 facing the first magnet portion 621.

[0374] The second opposite surface 622b is defined as the other side surface of the second magnet portion 622 facing the second surface 612. In other words, the second opposite surface 622b may be defined as the other side surface of the second magnet portion 622 facing the second facing surface 622a.

[0375] The second facing surface 622a and the second opposite surface 622b are configured to have different polarities. That is, the second facing surface 622a can be magnetized to one of the N pole and the S pole, while the second opposite surface 622b can be magnetized to the other of the N pole and the S pole.

[0376] Thus, the second magnet portion 622 itself forms a magnetic field that travels from one of the second facing surface 622 a and the second opposite surface 622 b to the other.

[0377] In this embodiment, the polarity of the second facing surface 622a may be the same as the polarity of the first facing surface 621a of the first magnet portion 621. Thus, a magnetic field in a direction of repelling each other is formed between the second magnet portion 622 and the first magnet portion 621.

[0378] Furthermore, in this embodiment, the polarity of the second facing surface 622a may be different from the polarity of the third facing surface 623a of the third magnet portion 623. Thus, a magnetic field in a direction that attracts each other is formed between the second magnet portion 622 and the third magnet portion 623.

[0379] exist Figure 8 (a) and Fig. 9 In the embodiment shown in (a), the second facing surface 622a and the first facing surface 621a are magnetized to the S pole. At this time, the third facing surface 623a is magnetized to the N pole.

[0380] exist Figure 8 (b) and Fig. 9 In the embodiment shown in (b), the second facing surface 622a and the first facing surface 621a are magnetized to the N pole. At this time, the third facing surface 623a is magnetized to the S pole.

[0381] The structure and arrangement of the third magnet portion 623 are the same as those of the third magnet portion 523 of the above embodiment. The third magnet portion 623 is arranged opposite to the first magnet portion 621 or the second magnet portion 622.

[0382] The third magnet portion 623 is located in the opposite direction to the first magnet portion 621 and the second magnet portion 622. In other words, the third magnet portion 623 is located on the third surface 613 and the fourth surface 614 which is farther from the first magnet portion 621 or the second magnet portion 622.

[0383] The magnetic force of the third magnet portion 623 may be greater than the magnetic force of the first magnet portion 621 or the second magnet portion 622 .

[0384] In one embodiment, the magnetic force of the third magnet portion 623 may be more than twice as strong as the magnetic force of each of the first magnet portion 621 and the second magnet portion 622 .

[0385] Thus, even if only the third magnet portion 623 is disposed adjacent to one of the fixed contacts 220 , a magnetic field having a sufficiently strong intensity for forming the arc path AP can be formed.

[0386] exist Figure 8 In the illustrated embodiment, the third magnet portion 623 is located inside the third surface 613. Also, the third magnet portion 623 is located in the middle portion of the third surface 613 in the front-to-back direction.

[0387] exist Fig. 9 In the illustrated embodiment, the third magnet portion 623 is located inside the fourth surface 614. Also, the fourth magnet portion 624 is located in the middle portion of the fourth surface 614 in the front-to-back direction.

[0388] The third magnet portion 623 includes a third facing surface 623 a and a third opposite surface 623 b .

[0389] The third facing surface 623a is defined as a side surface of the third magnet portion 623 facing the space portion 616. In other words, the third facing surface 623a may be defined as a side surface of the third magnet portion 623 facing the first magnet portion 621 or the second magnet portion 622.

[0390] The third opposite surface 623b is defined as the other side surface of the third magnet portion 623 facing the third surface 613. In other words, the third opposite surface 623b may be defined as a side surface of the third magnet portion 623 facing the third facing surface 623a.

[0391] The third facing surface 623a and the third opposite surface 623b are configured to have different polarities. That is, the third facing surface 623a is magnetized to one of the N pole and the S pole, and the third opposite surface 623b is magnetized to the other of the N pole and the S pole.

[0392] Thus, the third magnet portion 623 itself forms a magnetic field that travels from one of the third facing surface 623 a and the third opposite surface 623 b to the other.

[0393] In this embodiment, the polarity of the third facing surface 623a may be different from the polarity of the first facing surface 621a of the first magnet portion 621. Thus, a magnetic field in a direction of attracting each other is formed between the third magnet portion 623 and the first magnet portion 621.

[0394] The polarity of the third facing surface 623a may be different from the polarity of the second facing surface 622a of the second magnet portion 622. Thus, a magnetic field in a direction in which the third magnet portion 623 and the second magnet portion 622 attract each other is formed.

[0395] exist Figure 8 (a) and Fig. 9 In the embodiment shown in (a), the third facing surface 623a is magnetized to the N pole. At this time, the first facing surface 621a and the second facing surface 622a are magnetized to the S pole.

[0396] exist Figure 8 (b) and Fig. 9 In the embodiment shown in (b), the third facing surface 623a is magnetized to the S pole. At this time, the first facing surface 621a and the second facing surface 622a are magnetized to the N pole.

[0397] As a result, the electromagnetic forces formed by the current passing through the magnetic field formed by the magnet part 520 are directed in different directions. This will be described in detail later.

[0398] 4. Description of the arc path AP formed by the arc path forming portions 500 and 600 of the embodiment of the present invention

[0399] The DC relay 10 according to the embodiment of the present invention includes arc path forming parts 500 and 600 . The arc path forming parts 500 and 600 form a magnetic field inside the arc chamber 210 .

[0400] When the fixed contact 220 and the movable contact 430 come into contact with each other and current flows in the state where the magnetic field is formed, an electromagnetic force is generated according to Fleming's left hand rule. The electromagnetic force can be defined as a Lorentz force.

[0401] Under the action of the electromagnetic force, an arc path AP may be formed to move the arc generated by the separation of the fixed contact 220 and the movable contact 430 .

[0402] Below, refer to Figures 10 to 17 The process of forming the arc path AP in the DC relay 100 according to the embodiment of the present invention will be described in detail.

[0403] In the following description, it is assumed that an arc is generated at a portion where the fixed contact 220 and the movable contact 430 have been in contact immediately after the fixed contact 220 and the movable contact 430 are separated.

[0404] In the following description, the magnetic field formed between the different magnet units 520 and 620 is defined as a “main magnetic field (MMF)”, and the magnetic field formed by each magnet unit 520 and 620 itself is defined as a “sub magnetic field (SMF)”.

[0405] (1) Description of the arc path AP formed by the arc path forming portion 500 of one embodiment of the present invention

[0406] Reference Figures 10 to 13 , showing the direction of the arc path AP formed by the arc path forming portion 500 according to an embodiment of the present invention.

[0407] In this embodiment, the facing surfaces 521 a , 522 a , and 523 a of each magnet portion 520 facing each other are magnetized to the same polarity.

[0408] Fig.10 (a) Fig.11 (a) Fig.12 (a) and Fig.13The current conduction direction in (a) is a direction in which the current flows into the second fixed contact 220 b and passes through the movable contact 430 , and then flows out through the first fixed contact 220 a .

[0409] Fig.10 (b) Fig.11 (b) Fig.12 (b) and Fig.13 The current flow direction in (b) is a direction in which the current flows into the first fixed contact 220 a , passes through the movable contact 430 , and then flows out through the second fixed contact 220 b .

[0410] Reference Fig.10 The first facing surface 521a, the second facing surface 522a and the third facing surface 523a are all magnetized to the N pole.

[0411] As is known to all, a magnetic field is formed in a direction diverging from the N pole and converging to the S pole.

[0412] Therefore, a main magnetic field MMF in a direction that repels each other is formed between the first magnet portion 521 , the second magnet portion 522 , and the third magnet portion 523 .

[0413] Specifically, in Fig.10 (a) Fig.10 (b) Fig.12 (a) and Fig.12 In the embodiment shown in (b), a main magnetic field MMF is formed between the magnet portions 521 , 522 , and 523 in directions diverging from each other.

[0414] Similarly, in Fig.11 (a) Fig.11 (b) Fig.13 (a) and Fig.13 In the embodiment shown in (b), a main magnetic field MMF is formed between the magnet portions 521 , 522 , and 523 , which converges toward the magnet portions themselves.

[0415] On the other hand, each magnet portion 521 , 522 , 523 forms a secondary magnetic field SMF formed by itself.

[0416] Specifically, in Fig.10 (a) Fig.10 (b) Fig.12 (a) and Fig.12 In the embodiment shown in (b), a secondary magnetic field SMF is formed in each magnet portion 521 , 522 , 523 in a direction from each facing surface 521 a , 522 a , 523 a to each opposite surface 521 b , 522 b , 523 b .

[0417] Similarly, in Fig.11 (a) Fig.11 (b) Fig.13 (a) and Fig.13 In the embodiment shown in (b), each magnet portion 521, 522, 523 forms a secondary magnetic field SMF in a direction from each opposite surface 521b, 522b, 523b to each facing surface 521a, 522a, 523a.

[0418] It can be understood that the direction of the secondary magnetic field SMF formed by each magnet portion 521 , 522 , 523 is the same as the direction of the main magnetic field MMF formed between each magnet portion 521 , 522 , 523 .

[0419] Therefore, the strength of the main magnetic field MMF formed between the magnet portions 521 , 522 , and 523 can be enhanced by using the secondary magnetic field SMF.

[0420] Accordingly, the direction of the electromagnetic force, namely the Lorentz force, generated in each of the illustrated embodiments and the path AP of the arc formed thereby are described in detail as follows.

[0421] exist Fig.10 (a) Fig.11 (b) Fig.12 (b) and Fig.13 In the embodiment shown in (a), the arc path AP formed near the first fixed contact 220a is formed to the left or right side in the rear. At this time, the arc path AP formed near the second fixed contact 220b is formed to the left or right side in the front.

[0422] exist Fig.10 (b) Fig.11 (a) Fig.12 (a) and Fig.13 In the embodiment shown in (b), the arc path AP formed near the first fixed contact 220a is formed to the left or right side in the front. At this time, the arc path AP formed near the second fixed contact 220b is formed to the left or right side in the rear.

[0423] That is, the arc path AP formed by the arc path forming portion 500 of the present embodiment near the first fixed contact 220a is formed toward one of the front side and the rear side. On the other hand, the arc path AP formed near the second fixed contact 220b is formed toward the other of the front side and the rear side.

[0424] Therefore, the arc paths AP formed near the fixed contacts 220a and 220b do not overlap each other, thereby preventing the arc path forming portion 600 and the DC relay 10 from being damaged due to overlapping arc paths AP.

[0425] Furthermore, the arc path AP is formed in a direction away from the center portion C. Therefore, various components of the DC relay 10 arranged in the center portion C can be prevented from being damaged.

[0426] (2) Description of the arc path AP formed by the arc path forming portion 600 of another embodiment of the present invention

[0427] Reference Figures 14 to 17 , showing the direction of the arc path AP formed by the arc path forming portion 600 according to another embodiment of the present invention.

[0428] In this embodiment, the facing surfaces 621a and 622a of the first magnet portion 621 and the second magnet portion 622 are magnetized to have the same polarity. In addition, the third facing surface 623a of the third magnet portion 623 facing the first magnet portion 621 and the second magnet portion 622 is magnetized to have a polarity different from that of the first facing surface 621a and the second facing surface 622a.

[0429] Fig.14 (a) Fig.15 (a) Fig.16 (a) Fig.17 The current conduction direction in (a) is a direction in which the current flows into the second fixed contact 220 b and passes through the movable contact 430 , and then flows out through the first fixed contact 220 a .

[0430] Fig.14 (b) Fig.15 (b) Fig.16 (b) Fig.17 The current flow direction in (b) is a direction in which the current flows into the first fixed contact 220 a , passes through the movable contact 430 , and then flows out through the second fixed contact 220 b .

[0431] Reference Fig.14 The first facing surface 621a and the second facing surface 622a are magnetized to the S pole, and the third facing surface 623a is magnetized to the N pole.

[0432] As is known to all, a magnetic field is formed in a direction diverging from the N pole and converging to the S pole.

[0433] Therefore, a main magnetic field MMF from the third magnet part 623 toward the first magnet part 621 is formed between the first magnet part 621 and the third magnet part 623. Also, a main magnetic field MMF from the third magnet part 623 toward the second magnet part 622 is formed between the second magnet part 622 and the third magnet part 623.

[0434] Similarly, in Fig.16 In the illustrated embodiment, a main magnetic field MMF is formed between the first magnet portion 621 and the third magnet portion 623 in a direction from the third magnet portion 623 toward the first magnet portion 621. In addition, a main magnetic field MMF is also formed between the second magnet portion 622 and the third magnet portion 623 in a direction from the third magnet portion 623 toward the second magnet portion 622.

[0435] Reference Fig.15 The first facing surface 621a and the second facing surface 622a are magnetized to the N pole, and the third facing surface 623a is magnetized to the S pole.

[0436] As is known to all, a magnetic field is formed in a direction diverging from the N pole and converging to the S pole.

[0437] Therefore, a main magnetic field MMF is formed between the first magnet part 621 and the third magnet part 623 in a direction from the first magnet part 621 to the third magnet part 623. Also, a main magnetic field MMF is formed between the second magnet part 622 and the third magnet part 623 in a direction from the third magnet part 623 to the second magnet part 622.

[0438] Similarly, in Fig.17 In the illustrated embodiment, a main magnetic field MMF from the first magnet portion 621 to the third magnet portion 623 is also formed between the first magnet portion 621 and the third magnet portion 623. In addition, a main magnetic field MMF from the third magnet portion 623 to the second magnet portion 622 is also formed between the second magnet portion 622 and the third magnet portion 623.

[0439] On the other hand, each magnet portion 621 , 622 , 623 forms a secondary magnetic field SMF formed by itself.

[0440] Specifically, in Fig.14 (a) Fig.14 (b) Fig.16 (a) and Fig.16In the embodiment shown in (b), the first magnet portion 621 forms a secondary magnetic field SMF in the direction from the first opposite surface 621b to the first facing surface 621a. The second magnet portion 622 forms a secondary magnetic field SMF in the direction from the second opposite surface 622b to the second facing surface 622a, and the third magnet portion 623 forms a secondary magnetic field SMF in the direction from the third facing surface 623a to the third opposite surface 623b.

[0441] Similarly, in Fig.15 (a) Fig.15 (b) Fig.17 (a) and Fig.17 In the embodiment shown in (b), the first magnet portion 621 forms a secondary magnetic field SMF in the direction from the first facing surface 621a to the first opposite surface 621b. The second magnet portion 622 forms a secondary magnetic field SMF in the direction from the second facing surface 622a to the second opposite surface 622b, and the third magnet portion 623 forms a secondary magnetic field SMF in the direction from the third opposite surface 623b to the third facing surface 623a.

[0442] It can be understood that the direction of the secondary magnetic field SMF formed by each magnet portion 621 , 622 , 623 is the same as the direction of the main magnetic field MMF formed between each magnet portion 621 , 622 , 623 .

[0443] Therefore, the strength of the main magnetic field MMF formed between the magnet portions 621 , 622 , and 623 can be enhanced by using the secondary magnetic field SMF.

[0444] Accordingly, the direction of the electromagnetic force, namely the Lorentz force, generated in each of the illustrated embodiments and the path AP of the arc formed thereby are described in detail as follows.

[0445] exist Fig.14 (a) Fig.15 (b) Fig.16 (a) and Fig.17 In the embodiment shown in (b), the arc path AP formed near the first fixed contact 220a is formed to the left side in the rear direction. At this time, the arc path AP formed near the second fixed contact 220b is formed to the right side in the front direction.

[0446] exist Fig.14 (b) Fig.15 (a) Fig.16 (b) and Fig.17 In the embodiment shown in (a), the arc path AP formed near the first fixed contact 220a is formed to the left side in the front. At this time, the arc path AP formed near the second fixed contact 220b is formed to the right side in the rear.

[0447] That is, the arc path AP formed by the arc path forming portion 600 of the present embodiment near the first fixed contact 220a is formed to the left side of the front side or the left side of the rear side. On the other hand, the arc path AP formed near the second fixed contact 220b is formed to the right side of the front side or the right side of the rear side.

[0448] Therefore, arc paths AP formed near the fixed contacts 220a and 220b are formed in directions away from each other. In other words, arc paths AP formed near the fixed contacts 220a and 220b do not overlap each other at specific locations.

[0449] Thus, damage to the arc path forming portion 600 and the DC relay 10 due to the generated arc can be minimized.

[0450] The arc path AP described above can be formed along the tendency of the electromagnetic force formed at a distance from each other. Also, as described above, the ribs 617 formed in the central portions of the first surface 611 and the second surface 612 can prevent unintended distortion of the arc.

[0451] Therefore, the arc paths AP formed near the fixed contacts 220a and 220b do not overlap each other, thereby preventing the arc path forming portion 600 and the DC relay 10 from being damaged due to overlapping arc paths AP.

[0452] Furthermore, the arc path AP is formed in a direction away from the center portion C. Therefore, it is possible to prevent various components of the DC relay 10 disposed in the center portion C from being damaged.

[0453] The present invention has been described above with reference to the preferred embodiments. However, it will be apparent to those skilled in the art that various modifications and changes may be made to the present invention without departing from the technical concept and scope of the present invention as described in the following claims.

[0454] 10: DC relay

[0455] 100: Framework

[0456] 110: Upper frame

[0457] 120: Lower frame

[0458] 130: Insulation board

[0459] 140: Support plate

[0460] 200: Opening and closing part

[0461] 210: Arc chamber

[0462] 220: Fixed contact

[0463] 220a: First fixed contact

[0464] 220b: Second fixed contact

[0465] 230: Sealing member

[0466] 300: Core

[0467] 310: Fixed core

[0468] 320: Movable core

[0469] 330: Yoke

[0470] 340: Winding spool

[0471] 350: Coil

[0472] 360: Return spring

[0473] 370: Cylinder

[0474] 400: Movable contact

[0475] 410: Shell

[0476] 420: Cover

[0477] 430: Movable contact

[0478] 440: Axis

[0479] 450: Elastic part

[0480] 500: Arc path forming portion according to an embodiment of the present invention

[0481] 510: Magnet frame

[0482] 511: Side 1

[0483] 512: Side 2

[0484] 513: The third side

[0485] 514: The fourth side

[0486] 515: Arc discharge hole

[0487] 516: Space Department

[0488] 517: Tendon

[0489] 520: Magnet Department

[0490] 521: First magnet unit

[0491] 521a: First facing surface

[0492] 521b: First opposite side

[0493] 522: Second magnet part

[0494] 522a: Second facing surface

[0495] 522b: Second opposite side

[0496] 523: Third magnet part

[0497] 523a: Third facing surface

[0498] 523b: The third opposite side

[0499] 600: Arc path forming portion according to another embodiment of the present invention

[0500] 610: Magnet frame

[0501] 611: Side 1

[0502] 612: Side 2

[0503] 613: The third side

[0504] 614: The fourth side

[0505] 615: Arc discharge hole

[0506] 616: Space Department

[0507] 617: Tendon

[0508] 620: Magnet Department

[0509] 621: First magnet unit

[0510] 621a: First facing surface

[0511] 621b: First opposite side

[0512] 622: Second magnet part

[0513] 622a: Second facing surface

[0514] 622b: Second opposite side

[0515] 623: Third magnet part

[0516] 623a: Third facing surface

[0517] 623b: The third opposite side

[0518] 1000: DC relays of the prior art

[0519] 1100: Fixed contacts of the prior art

[0520] 1200: Movable contact of prior art

[0521] 1300: Permanent magnets of the prior art

[0522] 1310: The first permanent magnet in the prior art

[0523] 1320: Second permanent magnet of prior art

[0524] C: The center of the space 516, 616, 716, 816

[0525] MMF: Main Magnetic Field

[0526] SMF: Secondary Magnetic Field

[0527] AP: Path of the Arc

Claims

1. An arc path forming portion, wherein: include: A magnet frame, wherein a space is formed inside the magnet frame, and the magnet frame has a plurality of surfaces surrounding the space; as well as a magnet part, which is combined with the plurality of the surfaces and forms a magnetic field in the space, The magnet frame comprises: A first surface extending in one direction; and The second surface is opposite to the first surface and extends along the one direction. The magnet portion comprises: A first magnet portion, located on the first surface; and The second magnet portion is arranged on the second surface so as to face the first magnet portion. A first facing surface of the first magnet part facing the second magnet part and a second facing surface of the second magnet part facing the first magnet part have the same polarity, The magnet frame also includes: a third surface formed continuously with one end portion of the first surface and one end portion of the second surface; and a fourth surface, facing the third surface, extending between the other side end of the first surface and the other side end of the second surface, The magnet portion includes a third magnet portion located on the third surface, A fixed contact and a movable contact configured to contact with or separate from the fixed contact are accommodated in the space. The fixed contact includes a first fixed contact located on one side in the one direction and a second fixed contact located on the other side in the one direction, The first magnet portion and the second magnet portion are arranged adjacent to the first fixed contact. The third magnet portion is arranged adjacent to the second fixed contact.

2. An arc path forming portion, wherein: include: A magnet frame, wherein a space is formed inside the magnet frame, and the magnet frame has a plurality of surfaces surrounding the space; as well as a magnet part, which is combined with the plurality of the surfaces and forms a magnetic field in the space, The magnet frame comprises: A first surface extending in one direction; and The second surface is opposite to the first surface and extends along the one direction. The magnet portion comprises: A first magnet portion, located on the first surface; and The second magnet portion is arranged on the second surface so as to face the first magnet portion. A first facing surface of the first magnet part facing the second magnet part and a second facing surface of the second magnet part facing the first magnet part have the same polarity, The magnet frame also includes: a third surface formed continuously with one end portion of the first surface and one end portion of the second surface; and a fourth surface, facing the third surface, extending between the other side end of the first surface and the other side end of the second surface, The magnet portion includes a third magnet portion located on the third surface, A fixed contact and a movable contact configured to contact with or separate from the fixed contact are accommodated in the space. The fixed contact includes a first fixed contact located on one side in the one direction and a second fixed contact located on the other side in the one direction, The first magnet portion and the second magnet portion are arranged adjacent to the second fixed contact. The third magnet portion is arranged adjacent to the first fixed contact.

3. An arc path forming portion, wherein: include: A magnet frame, wherein a space is formed inside the magnet frame, and the magnet frame has a plurality of surfaces surrounding the space; as well as a magnet part, which is combined with the plurality of the surfaces and forms a magnetic field in the space, The magnet frame comprises: A first surface extending in one direction; and The second surface is opposite to the first surface and extends along the one direction. The magnet portion comprises: A first magnet portion, located on the first surface; and The second magnet portion is arranged on the second surface so as to face the first magnet portion. A first facing surface of the first magnet part facing the second magnet part and a second facing surface of the second magnet part facing the first magnet part have the same polarity, The magnet frame also includes: a third surface formed continuously with one end portion of the first surface and one end portion of the second surface; and a fourth surface, facing the third surface, extending between the other side end of the first surface and the other side end of the second surface, The magnet portion includes a third magnet portion located on the third surface, A fixed contact and a movable contact configured to contact with or separate from the fixed contact are accommodated in the space. The fixed contact includes a first fixed contact located on one side in the one direction and a second fixed contact located on the other side in the one direction, The first magnet portion and the second magnet portion are arranged adjacent to one of the first fixed contact and the second fixed contact. The third magnet portion is arranged adjacent to the other of the first fixed contact and the second fixed contact. A rib is formed on at least one of the first surface and the second surface, The rib is located between the first fixed contact and the second fixed contact, and protrudes toward the space by a predetermined length.

4. The arc path forming portion according to claim 3, wherein: The ribs are formed on each of the first surface and the second surface, and are arranged adjacent to the center in the one direction in which the first surface and the second surface extend.

5. A DC relay, in, include: Fixed contacts; a movable contact that contacts with or separates from the fixed contact; and an arc path forming portion, wherein a space for accommodating the fixed contact and the movable contact is formed inside the arc path forming portion, and the arc path forming portion is configured to form a magnetic field in the space to form a discharge path for the arc generated by the separation of the fixed contact and the movable contact, The arc path forming portion comprises: a magnet frame having a space portion formed therein, the magnet frame having a plurality of surfaces surrounding the space portion; and a magnet portion, which is combined with the plurality of the surfaces and forms a magnetic field in the space portion, The magnet frame comprises: A first surface is formed by extending along one direction; A second surface, facing the first surface and extending along the one direction; a third surface extending between one end portion of the first surface and one end portion of the second surface; and a fourth surface, facing the third surface, extending between the other side end of the first surface and the other side end of the second surface, The magnet portion comprises: A first magnet portion, located on the first surface; and The second magnet portion is arranged on the second surface so as to face the first magnet portion. A first facing surface of the first magnet part facing the second magnet part and a second facing surface of the second magnet part facing the first magnet part have the same polarity, The fixed contact comprises: A first fixed contact is arranged adjacent to one end portion in the one direction; and The second fixed contact is arranged adjacent to the other end in the one direction, The magnet portion includes a third magnet portion, and the third magnet portion is arranged to be away from the first magnet portion and the second magnet portion. The first magnet portion and the second magnet portion are arranged adjacent to one of the first fixed contact and the second fixed contact. The third magnet portion is arranged adjacent to the other of the first fixed contact and the second fixed contact.

6. The DC relay according to claim 5, wherein: The third magnet portion is located on one of the third surface and the fourth surface, and is formed to extend between the first surface and the second surface.

7. The DC relay according to claim 6, wherein: A third opposing surface of the third magnet portion that faces the space portion has the same polarity as the first opposing surface and the second opposing surface.

8. The DC relay according to claim 5, wherein: A third facing surface of the third magnet portion that faces the first magnet portion or the second magnet portion has the same polarity as the first facing surface and the second facing surface.

9. The DC relay according to claim 8, wherein: The magnetic force of the third magnet portion is greater than the magnetic force of the first magnet portion and the second magnet portion.

10. The DC relay according to claim 5, wherein: A rib is formed on at least one of the first surface and the second surface of the magnet frame. The rib is located between the first fixed contact and the second fixed contact, and protrudes toward the space by a predetermined length.

11. An arc path forming portion, wherein: include: A magnet frame, wherein a space is formed inside the magnet frame, and the magnet frame has a plurality of surfaces surrounding the space; as well as a magnet part, which is combined with the plurality of the surfaces and forms a magnetic field in the space, The magnet frame comprises: A first surface is formed by extending along one direction; A second surface, facing the first surface and extending along the one direction; a third surface extending between one end portion of the first surface and one end portion of the second surface; and a fourth surface, facing the third surface, extending between the other side end of the first surface and the other side end of the second surface, The magnet portion comprises: A first magnet portion, located on the first surface; a second magnet portion disposed on the second surface so as to face the first magnet portion; and The third magnet portion is located on the third surface, A first facing surface of the first magnet part facing the second magnet part and a second facing surface of the second magnet part facing the first magnet part have the same polarity, A third facing surface of the third magnet portion facing the first magnet portion or the second magnet portion has a polarity different from that of the first facing surface and the second facing surface. A fixed contact and a movable contact configured to contact with or separate from the fixed contact are accommodated in the space. The fixed contact includes a first fixed contact located on one side in the one direction and a second fixed contact located on the other side in the one direction, The first magnet portion and the second magnet portion are arranged adjacent to the first fixed contact. The third magnet portion is arranged adjacent to the second fixed contact.

12. An arc path forming portion, wherein: include: A magnet frame, wherein a space is formed inside the magnet frame, and the magnet frame has a plurality of surfaces surrounding the space; as well as a magnet part, which is combined with the plurality of the surfaces and forms a magnetic field in the space, The magnet frame comprises: A first surface is formed by extending along one direction; A second surface, facing the first surface and extending along the one direction; a third surface extending between one end portion of the first surface and one end portion of the second surface; and a fourth surface, facing the third surface, extending between the other side end of the first surface and the other side end of the second surface, The magnet portion comprises: A first magnet portion, located on the first surface; a second magnet portion disposed on the second surface so as to face the first magnet portion; and The third magnet portion is located on the third surface, A first facing surface of the first magnet part facing the second magnet part and a second facing surface of the second magnet part facing the first magnet part have the same polarity, A third facing surface of the third magnet portion facing the first magnet portion or the second magnet portion has a polarity different from that of the first facing surface and the second facing surface. A fixed contact and a movable contact configured to contact with or separate from the fixed contact are accommodated in the space. The fixed contact includes a first fixed contact located on one side in the one direction and a second fixed contact located on the other side in the one direction, The first magnet portion and the second magnet portion are arranged adjacent to the second fixed contact. The third magnet portion is arranged adjacent to the first fixed contact.

13. An arc path forming portion, wherein: include: A magnet frame, wherein a space is formed inside the magnet frame, and the magnet frame has a plurality of surfaces surrounding the space; as well as a magnet part, which is combined with the plurality of the surfaces and forms a magnetic field in the space, The magnet frame comprises: A first surface is formed by extending along one direction; A second surface, facing the first surface and extending along the one direction; a third surface extending between one end portion of the first surface and one end portion of the second surface; and a fourth surface, facing the third surface, extending between the other side end of the first surface and the other side end of the second surface, The magnet portion comprises: A first magnet portion, located on the first surface; a second magnet portion disposed on the second surface so as to face the first magnet portion; and The third magnet portion is located on the third surface, A first facing surface of the first magnet part facing the second magnet part and a second facing surface of the second magnet part facing the first magnet part have the same polarity, A third facing surface of the third magnet portion facing the first magnet portion or the second magnet portion has a polarity different from that of the first facing surface and the second facing surface. A fixed contact and a movable contact configured to contact with or separate from the fixed contact are accommodated in the space. The fixed contact includes a first fixed contact located on one side in the one direction and a second fixed contact located on the other side in the one direction, The first magnet portion and the second magnet portion are arranged adjacent to one of the first fixed contact and the second fixed contact. The third magnet portion is arranged adjacent to the other of the first fixed contact and the second fixed contact. A rib is formed on at least one of the first surface and the second surface, The rib is located between the first fixed contact and the second fixed contact, and protrudes toward the space by a predetermined length.

14. The arc path forming portion according to claim 13, wherein: The ribs are formed on each of the first surface and the second surface, and are arranged adjacent to the center in the one direction in which the first surface and the second surface extend.

Images