Relay

Abstract

This relay comprises: a first fixed terminal which includes a first fixed contact; a second fixed terminal which is positioned to the left of the first fixed terminal and includes a second fixed contact; a movable contact which includes a first projection that comes into or out of contact with the first fixed contact; and a first magnet opposite the movable contact. The first magnet is provided to the right of the right end of the movable contact. The first projection overlaps the first fixed contact in a top view. The right end of the first fixed contact is located to the left of the right end of the movable contact, and to the right of the right end of the first projection.

Description

relay

[0001] The present invention relates generally to relays.

[0002] The relay described in Patent Document 1 includes a contact unit that is composed of two movable contacts and two fixed contacts. The movable contacts and the fixed contacts come into contact with or separate from each other.

[0003] In such a relay, when the movable contact and the fixed contact separate, the arc generated between them may extend from the left and right end faces of the movable contact in a direction perpendicular to the left and right end faces, i.e., the direction in which the arc extends becomes parallel to the direction of the magnetic flux of the magnet.

[0004] As a result, the Lorentz force required to extend the arc cannot be sufficiently secured, which may make it difficult to extinguish the arc.

[0005] Japanese Patent Application Laid-Open No. 2021-051978

[0006] The present invention comprises a first fixed terminal including a first fixed contact, a second fixed terminal located to the left of the first fixed terminal and including a second fixed contact, a movable contactor including a first protrusion that contacts or is separated from the first fixed contact, and a first magnet facing the movable contactor.

[0007] The first magnet is located to the right of the right end of the movable contactor. The first protrusion overlaps the first fixed contact in a top view. The right end of the first fixed contact is located to the left of the right end of the movable contactor and to the right of the right end of the first protrusion.

[0008] According to the present invention, the arc extinguishing capability of the relay can be improved.

[0009] Fig. 1 is a plan view of a relay according to an embodiment of the present invention. Fig. 2 is a side view of a relay according to an embodiment of the present invention. Fig. 3 is a cross-sectional view of a relay according to an embodiment of the present invention taken along line A-A in Fig. 1. Fig. 4 is a cross-sectional view of a relay according to an embodiment of the present invention taken along line A-A in Fig. 1. Fig. 5 is a perspective view of a movable contact of a relay according to an embodiment of the present invention. Fig. 6 is a cross-sectional view of a relay according to an embodiment of the present invention taken along line B-B in Fig. 2.

[0010]

[0023] (Embodiments) Specific embodiments of the present invention will be described with reference to the drawings. Note that, for the sake of convenience, the drawings show the up-down, left-right, and front-rear directions, but these directions do not in any way limit the orientation of the device when it is installed or used.

[0011] As shown in Figures 1 to 4, the relay 1 according to an embodiment of the present invention has a first fixed terminal 11, a second fixed terminal 15, a housing 21, a movable contactor 30, a first magnet 41, a second magnet 42, and a movable shaft 51.

[0012] 1 and 3 , the first fixed terminal 11 is made of a conductive material such as copper, has a generally cylindrical shape, and is fixed to the upper surface of the housing 21. The upper end of the first fixed terminal 11 is exposed to the outside of the housing 21, and the lower end of the first fixed terminal 11 is inserted into the housing 21. The lower end surface of the first fixed terminal 11 includes a first fixed contact 12 that comes into contact with or is separated from a first protrusion 31 of the movable contactor 30, which will be described later.

[0013] FIG. 6 is a cross-sectional view of the relay 1 according to an embodiment of the present invention, taken along line B-B in FIG. 2. In FIG. 6, projections of the first fixed contact 12 and the second fixed contact 16 are shown as shaded circular regions with dotted borders. As shown in FIG. 6, the first fixed contact 12 overlaps with the movable contactor 30 in a plan view. Here, "plan view" refers to a view from above. The outer edge of the first fixed contact 12 is located inside the outer edge of the movable contactor 30 in a plan view. Here, "the first fixed contact 12 overlaps with the movable contactor 30 in a plan view" means that when the first fixed contact 12 and the movable contactor 30 are projected onto a horizontal plane perpendicular to the plan view direction, the projections of the two overlap at least partially. Similarly, in the following description, "A and B overlap" means that when A and B are projected onto a plane perpendicular to the observation direction, the projections of the two overlap at least partially.

[0014] As shown in FIGS. 1 and 3 , the second fixed terminal 15 is disposed to the left of the first fixed terminal 11. The first fixed terminal 11 and the second fixed terminal 15 are arranged side by side in the left-right direction. The second fixed terminal 15 is formed of a conductive material such as copper and has a generally cylindrical shape. The second fixed terminal 15 is fixed to the upper wall of the housing 21, with its upper end exposed outside the housing 21 and its lower end inserted into the housing 21. The lower end surface of the second fixed terminal 15 includes a second fixed contact 16 that contacts or separates from a second protrusion 32 and / or a third protrusion 33 of the movable contactor 30, which will be described later. Furthermore, as shown in FIG. 6 , the second fixed contact 16 overlaps the movable contactor 30 when viewed from above, and the outer edge of the second fixed contact 16 is located inside the outer edge of the movable contactor 30 when viewed from above.

[0015] As shown in Figures 1 to 3, the housing 21 is made of a heat-resistant material such as ceramic, and is a rectangular box-shaped body that is open downward and has an upper wall and a peripheral wall. The movable contactor 30 is housed within the housing 21, which covers the movable contactor 30. The first fixed terminal 11 and the second fixed terminal 15 are inserted into the housing 21. The housing 21 is positioned between the first magnet 41 and the second magnet 42. The lower opening of the housing 21 is closed by a bottom plate 22, and a through-hole 221 through which the movable shaft 51 passes is provided in the center of the bottom plate 22. A connecting flange 23 is provided between the housing 21 and the bottom plate 22 to improve the sealing performance between the housing 21 and the bottom plate 22.

[0016] 5 and 6, the movable contactor 30 is made of a conductive material such as copper. The length of the movable contactor 30 is greater than the width of the movable contactor 30. In other words, the distance from the right end 30a to the left end 30b of the movable contactor 30 is greater than the distance from one side surface 30c to the other side surface 30d of the movable contactor 30. In addition, the width of the movable contactor 30 is greater than the thickness of the movable contactor 30.

[0017] A first protrusion 31 protruding upward is provided on the upper surface of the movable contactor 30. The shape of the first protrusion 31 in a plan view is a substantially trapezoid that is symmetrical about the center line of the movable contactor 30 in the left-right direction, and the width of the first protrusion 31 in the front-to-rear direction increases from left to right. The first protrusion 31 comes into contact with or is separated from the first fixed contact 12. In other words, the first protrusion 31 has a first movable contact. In other words, the movable contactor 30 has the first protrusion 31 that comes into contact with or is separated from the first fixed contact 12.

[0018] Furthermore, the movable contactor 30 includes a first base 34 located to the right of the first protrusion 31. The first protrusion 31 protrudes upward beyond the first base 34. Therefore, the distance between the first protrusion 31 and the first fixed terminal 11 is smaller than the distance between the first base 34 and the first fixed terminal 11.

[0019] The upper surface of the first base portion 34 is an inclined surface that slopes downward as it approaches the right end portion 30a of the movable contactor 30. The distance between the first base portion 34 and the first fixed terminal 11 increases toward the right end portion 30a of the movable contactor 30. Therefore, the arc is gradually elongated as it moves on the first base portion 34 toward the right end portion 30a.

[0020] Furthermore, it is preferable that the first protrusion 31 and the first base 34 are connected by a side surface of the first protrusion 31 that is configured as a smoothly curved surface. This allows the arc generated by the first protrusion 31 to easily move toward the first base 34.

[0021] The movable contactor 30 also has a second protrusion 32 and a third protrusion 33 arranged in parallel with the second protrusion 32. The second protrusion 32 and the third protrusion 33 each overlap the second fixed contact 16 in a plan view. The second protrusion 32 and the third protrusion 33 are provided on the upper surface of the movable contactor 30 and are aligned in the front-to-rear direction. Current flows in the left-to-right direction in the movable contactor 30. Therefore, the front-to-rear direction is a direction perpendicular to the direction in which current flows in the movable contactor 30. In other words, the second protrusion 32 and the third protrusion 33 are aligned in a direction perpendicular to the direction in which current flows in the movable contactor 30.

[0022] The second protrusion 32 and the third protrusion 33 have a generally right-angled trapezoidal shape in plan view, with their respective oblique sides facing each other in the front-rear direction. As a result, the shortest distance between the second protrusion 32 and the third protrusion 33 (i.e., the distance in the front-rear direction) increases as they approach the left end of the movable contactor 30. The second protrusion 32 and the third protrusion 33 have a second movable contact that comes into contact with the second fixed contact 16.

[0023] By providing the first protrusion 31 as a first movable contact on the movable contactor 30 and the second protrusion 32 and the third protrusion 33 as second movable contacts, when the relay 1 is closed, the movable contactor 30 comes into contact with the first fixed terminal 11 and the second fixed terminal 15 at three points. With this configuration, when the movable contactor 30 is in contact with the first fixed terminal 11 and the second fixed terminal 15, rattling of the movable contactor 30 is suppressed.

[0024] It should be noted that it is not necessary for the second fixed contact 16 to contact both the second protrusion 32 and the third protrusion 33; for example, the second fixed contact 16 may contact either the second protrusion 32 or the third protrusion 33.

[0025] Furthermore, the movable contactor 30 has a second base portion 35 located to the left of the second protrusion 32. The second protrusion 32 protrudes upward beyond the second base portion 35.

[0026] The distance between the second protrusion 32 and the second fixed terminal 15 is smaller than the distance between the second base 35 and the second fixed terminal 15. The upper surface of the second base 35 is an inclined surface that slopes downward as it approaches the left end 30b of the movable contactor 30. Therefore, the distance between the second base 35 and the second fixed terminal 15 becomes larger as it moves toward the left end 30b of the movable contactor 30. Therefore, the arc is gradually elongated as it moves on the second base 35 toward the left end 30b.

[0027] Furthermore, it is preferable that the second protrusion 32 and the second base 35 are connected by a side surface of the second protrusion 32 that is configured as a smoothly curved surface. This allows an arc generated at the second protrusion 32 to easily move from the second protrusion 32 toward the second base 35. Similarly, it is preferable that the third protrusion 33 and the second base 35 are connected by a side surface of the third protrusion 33 that is configured as a smoothly curved surface. This configuration allows an arc generated at the third protrusion 33 to easily move from the third protrusion 33 toward the second base 35.

[0028] As shown in Figures 3 and 4, the movable contact 30 is held at the upper end of the movable shaft 51 by a holder 52, and moves up and down as the movable shaft 51 moves up and down, and can move between an open position and a closed position. In Figure 3, the movable contact 30 is in the open position, which may be referred to as the "open state." In Figure 4, the movable contact 30 is in the closed position, which may be referred to as the "closed state."

[0029] Specifically, when electricity is applied to the electromagnetic body, the movable shaft 51 moves upward, moving the movable contactor 30 upward so that the upper surface of the first protrusion 31 contacts the first fixed contact 12 and the upper surfaces of the second protrusion 32 and the third protrusion 33 contact the second fixed contact 16. The upward movement of the movable contactor 30 establishes electrical continuity between the first fixed terminal 11 and the second fixed terminal 15 (see FIG. 4 ).

[0030] Figure 4 shows the relay 1 in the closed position. When the electromagnetic body is de-energized, the movable shaft 51 moves downward due to the action of the recovery spring, and the movable contactor 30 moves downward. The first protrusion 31 moves away from the first fixed contact 12, and the second protrusion 32 and the third protrusion 33 move away from the second fixed contact 16. As a result, the first fixed terminal 11 and the second fixed terminal 15 switch from a conductive state to a cut-off state. Figure 3 shows the relay 1 switched to the cut-off position shown in Figure 3.

[0031] 3 and 6, a first magnet 41 is provided on the right side of the housing 21, and a second magnet 42 is provided on the left side of the housing 21. The first magnet 41 and the second magnet 42 are provided so as to face each other in the front-to-rear direction. The first magnet 41 and the second magnet 42 are held by a first holder 45 and a second holder 46, respectively, which are substantially U-shaped.

[0032] Here, the first magnet 41 is held on the outer surface of the right side wall 21a of the housing 21, and the second magnet 42 is held on the outer surface of the left side wall 21b of the housing 21. The first magnet 41 and the second magnet 42 are arranged so that their like poles face each other. For example, if they are arranged so that their north poles face each other, the left side surface of the first magnet 41 will be its north pole and its right side surface will be its south pole, and the right side surface of the second magnet 42 will be its north pole and its left side surface will be its south pole. Note that it is not necessary for the like poles to face each other, and the first magnet 41 and the second magnet 42 may have opposite poles facing each other.

[0033] The first magnet 41 is a permanent magnet such as a ferrite magnet or a neodymium magnet. The first magnet 41 is provided to the right of the right end of the movable contactor 30 and faces the movable contactor 30. The first magnet 41 is also arranged so as to overlap the movable contactor 30 when viewed from the right side, and it is preferable that the width of the first magnet 41 in the front-rear direction is greater than the width of the movable contactor 30 in the front-rear direction.

[0034] Furthermore, it is preferable that the height of the first magnet 41 in the vertical direction is greater than the distance between the first fixed contact 12 and the first protrusion 31 when the movable contactor 30 is in the open position.

[0035] In this configuration, the first magnet 41 generates a magnetic flux from right to left in the space between the first fixed contact 12 and the first protrusion 31 .

[0036] The second magnet 42 is a permanent magnet such as a ferrite magnet or a neodymium magnet. The second magnet 42 is provided to the left of the left end of the movable contactor 30 and faces the movable contactor 30. The second magnet 42 is also arranged so as to overlap the movable contactor 30 when viewed from the left side, and it is preferable that the width of the second magnet 42 in the front-rear direction is greater than the width of the movable contactor 30 in the front-rear direction.

[0037] Furthermore, it is preferable that the vertical height of the second magnet 42 is greater than the distance between the second fixed contact 16 and the second protrusion 32 and the distance between the second fixed contact 16 and the third protrusion 33 when the movable contactor 30 is in the open position.

[0038] In this configuration, the second magnet 42 generates a magnetic flux from left to right in the space between the second fixed contact 16 and the second protrusion 32 and in the space between the second fixed contact 16 and the third protrusion 33 .

[0039] As shown in Figure 6, when the movable contactor 30 moves downward from the closed position to the open position, an arc is generated between the first fixed contact 12 and the first protrusion 31, and also between the second fixed contact 16 and the second protrusion 32 and the third protrusion 33.

[0040] The Lorentz force acting on the arc that occurs when a current flows from the first fixed terminal 11 side to the second fixed terminal 15 side when the relay 1 is in the closed position will be described.

[0041] On the first fixed terminal 11 side, current flows from upward to downward from the first fixed contact 12 toward the first protrusion 31. In addition, the first magnet 41 generates a magnetic flux from right to left in the space between the first fixed contact 12 and the first protrusion 31. Therefore, a backward Lorentz force F1 acts on the arc generated between the first fixed contact 12 and the first protrusion 31.

[0042] Furthermore, on the second fixed terminal 15 side, current flows from the second protrusion 32 and the third protrusion 33 from bottom to top toward the second fixed contact 16. Furthermore, the second magnet 42 generates a magnetic flux from left to right in the space between the second fixed contact 16 and the second protrusion 32 and the third protrusion 33. Therefore, a backward Lorentz force F2 acts on the arc generated between the second fixed contact 16 and the second protrusion 32 or the third protrusion 33.

[0043] The same can be said about the Lorentz force acting on the arc that occurs when current flows from the second fixed terminal 15 to the first fixed terminal 11 while the relay 1 is in the closed position. That is, a forward Lorentz force F1 acts on the arc that occurs between the first fixed contact 12 and the first protrusion 31. And a forward Lorentz force F2 acts on the arc that occurs between the second fixed contact 16 and the second protrusion 32 or the third protrusion 33.

[0044] As shown in Figure 6, when viewed from above, the left-right distance between the inner surface of the right side wall 21a of the housing 21 and the right end 30a of the movable contactor 30 is smaller than the front-to-back distance between the inner surface of the front wall 21c of the housing 21 and the side surface 30c of the movable contactor 30, and is also smaller than the front-to-back distance between the inner surface of the rear wall 21d of the housing 21 and the side surface 30d of the movable contactor 30.

[0045] That is, the shortest distance between the inner surface of the housing 21 and the right end 30a of the movable contactor 30 is shorter than the shortest distance between the inner surface of the housing 21 and the side surface 30c and the shortest distance between the inner surface of the housing 21 and the side surface 30d. With this configuration, the space between the inner surface of the housing 21 and the right end 30a of the movable contactor 30 is relatively small, and the space between the inner surface of the housing 21 and the side surfaces 30c, 30d of the movable contactor 30 is relatively large.

[0046] This makes it possible to prevent the housing 21 from becoming too large in the left-right direction while ensuring a space for extending the arc between the side surfaces 30c, 30d of the movable contact 30 and the inner surface of the housing 21.

[0047] Furthermore, when viewed from above, the left-right distance between the inner surface of the left side wall 21b of the housing 21 and the left end 30b of the movable contactor 30 is smaller than the front-to-back distance between the inner surface of the front wall 21c of the housing 21 and the side surface 30c of the movable contactor 30, and is also smaller than the front-to-back distance between the inner surface of the rear wall 21d of the housing 21 and the side surface 30d of the movable contactor 30.

[0048] That is, the shortest distance between the inner surface of the housing 21 and the left end 30b of the movable contactor 30 is shorter than the shortest distance between the inner surface of the housing 21 and the side surface 30c and the shortest distance between the inner surface of the housing 21 and 30d. With this configuration, the space between the inner surface of the housing 21 and the left end 30b of the movable contactor 30 is relatively small, and the space between the inner surface of the housing 21 and the side surfaces 30c, 30d of the movable contactor 30 is relatively large.

[0049] This makes it possible to prevent the housing 21 from becoming too large in the left-right direction while ensuring a space for extending the arc between the side surfaces 30c, 30d of the movable contact 30 and the inner surface of the housing 21.

[0050] Furthermore, a pair of first protrusions 24 and a pair of second protrusions 25 are provided facing each other on the inner surfaces of the front wall 21c and the rear wall 21d of the housing 21. The first protrusion 24 is located to the right of the second protrusion 25, and the protrusion height of the first protrusion 24 in the front-to-rear direction is smaller than the protrusion height of the second protrusion 25 in the front-to-rear direction.

[0051] The first convex portion 24 can prevent an arc generated on the first fixed contact 12 side from propagating to the second fixed contact 16 side, and the second convex portion 25 can prevent an arc generated on the second fixed contact 16 side from propagating to the first fixed contact 12 side. In addition, the second convex portion 25 can also restrict the rotation of the movable contactor 30 by abutting against the movable contactor 30 or the holder 52.

[0052] 6, when viewed from above, the first protrusion 31 overlaps the first fixed contact 12, and the first protrusion 31 is completely covered by the first fixed contact 12. The right end of the first fixed contact 12 is located to the left of the right end of the movable contactor 30 and to the right of the right end of the first protrusion 31. This ensures a distance for the arc to travel between the right end of the first protrusion 31 and the right end (right end 30a) of the movable contactor 30.

[0053] Specifically, an example will be described in which, when the relay 1 is in the closed state, a current flows from the first fixed terminal 11 to the second fixed terminal 15. When the movable contactor 30 moves from the closed position to the open position, an arc is generated at the contact point between the first fixed contact 12 and the first protrusion 31, and the arc moves along the upper surface of the movable contactor 30, starting from the first protrusion 31.

[0054] By setting the distance over which the arc generated between the right end (right end 30b) of the first protrusion 31 and the right end of the movable contactor 30 can move, the arc moving toward the right end 30a of the movable contactor 30 can be suppressed.

[0055] When the arc extends rightward from the right end 30a of the movable contactor 30, the direction in which the arc extends becomes approximately parallel to the direction of the magnetic flux of the first magnet 41, making it difficult for the Lorentz force to act on the arc and making it difficult to extinguish the arc. Furthermore, if the space between the inner surface of the housing 21 and the right end 30a of the movable contactor 30 is relatively small, the arc will extend further, making it difficult to extinguish the arc.

[0056] In contrast, when the configuration of the present invention is used, the generated arc moves toward the side surface 30d of the movable contactor 30 and is extended rearward from the side surface 30d of the movable contactor 30. Therefore, a relatively large Lorentz force is likely to act on the arc, making it easier to extinguish the arc.

[0057] In addition, if the space between the inner surface of the housing 21 and the side surface 30d of the movable contactor 30 is larger than the space between the inner surface of the housing 21 and the right end portion 30a of the movable contactor 30, the arc becomes easier to extend, making it easier to extinguish the arc.

[0058] When viewed from above, the second protrusion 32 and the third protrusion 33 overlap the second fixed contact 16. Furthermore, the left end of the second fixed contact 16 is located to the right of the left end of the movable contactor 30, and to the left of the left ends of the second protrusion 32 and the third protrusion 33. This ensures that the distance over which the arc travels can be secured between the left end of the second protrusion 32 and the left end (left end 30b) of the movable contactor 30, and between the left end of the third protrusion 33 and the left end (left end 30b) of the movable contactor 30.

[0059] Specifically, a case will be described in which a current flows from the first fixed terminal 11 to the second fixed terminal 15 when the movable contactor 30 of the relay 1 is in the closed state. When the movable contactor 30 moves from the closed position to the open position, an arc is generated between the contact portion of the second fixed contact 16 and the second protrusion 32, or between the contact portion of the second fixed contact 16 and the third protrusion 33. The arc starts at the second protrusion 32 or the third protrusion 33 and moves along the upper surface of the movable contactor 30. By setting the distance that the arc moves between the second protrusion 32 and the left end (left end 30b) of the movable contactor 30, or between the left end of the third protrusion 33 and the left end (left end 30b) of the movable contactor 30, it is possible to suppress the arc from moving toward the left end 30b of the movable contactor 30.

[0060] Here, when the arc extends leftward from the left end 30b of the movable contactor 30, the direction in which the arc extends is approximately parallel to the direction of the magnetic flux of the second magnet 42, making it difficult for the Lorentz force to act on the arc and making it difficult to extinguish the arc. Furthermore, if the space between the inner surface of the housing 21 and the left end 30b of the movable contactor 30 is relatively small, the arc will extend further, making it difficult to extinguish.

[0061] In contrast, when the structure of the present invention is used, the generated arc moves toward the side surface 30d of the movable contactor 30 and is extended rearward from the side surface 30d of the movable contactor 30. Therefore, a relatively large Lorentz force is likely to be generated in the arc, making it easier to extinguish the arc.

[0062] In addition, if the space between the inner surface of the housing 21 and the side surface 30d of the movable contactor 30 is larger than the space between the inner surface of the housing 21 and the right end portion 30a of the movable contactor 30, the arc becomes easier to extend, making it easier to extinguish the arc.

[0063] The upper surface of the first base 34 is formed as an inclined surface. Therefore, even if the movable contact 30 is inclined in the left-right direction when it moves from the closed position to the open position, the distance between the first protrusion 31 and the first fixed terminal 11 is smaller than the distance between the first base 34 and the first fixed terminal 11.

[0064] The upper surface of the second base 35 is formed as an inclined surface. Therefore, even if the movable contact 30 is inclined left and right when it moves from the closed position to the open position, the distance between the second protrusion 32 and the second fixed terminal 15 and the distance between the third protrusion 33 and the second fixed terminal 15 are smaller than the distance between the second base 35 and the second fixed terminal 15.

[0065] Therefore, the arc can easily move along the upper surface of the movable contact 30 starting from the first projection 31, the second projection 32, and the third projection 33, and the arc can move a longer distance.

[0066] Although the example has been explained in which the arc that has moved toward the side surface 30d of the movable contactor 30 extends rearward from the side surface 30d of the movable contactor 30, the arc may be configured to move toward the side surface 30c of the movable contactor 30 and extend forward from the side surface 30c of the movable contactor 30 by changing the magnetic poles of the first magnet 41 or the second magnet 42 or the direction of the current flowing when the relay 1 is in the closed state.

[0067] The embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments. The present invention also includes modifications in which various modifications devised by those skilled in the art are made to the above-described embodiments, within the scope of the claims.

[0068] For example, in the above-described embodiment, the movable contactor 30 is provided with the second protrusion 32 and the third protrusion 33, but the second protrusion 32 and the third protrusion 33 may be combined into a single protrusion like the first protrusion 31.

[0069] Furthermore, for example, in the above-described embodiment, the movable contactor 30 is provided with a first protrusion 31, but it is also possible to provide another protrusion arranged parallel to the first protrusion 31, thereby making it possible to have two or more protrusions such as a second protrusion 32 and a third protrusion 33.

[0070] For example, in the above-described embodiment, the upper surfaces of the first base portion 34 and the second base portion 35 may not be inclined surfaces sloping downward, but may be flat surfaces that are aligned with the upper surfaces of other parts of the movable contactor 30, for example.

[0071] The relay 1 described above can improve the arc-extinguishing capability.

[0072] REFERENCE SIGNS LIST 1 relay 11 first fixed terminal 12 first fixed contact 15 second fixed terminal 16 second fixed contact 21 housing 21a right side wall 21b left side wall 21c front side wall 21d rear side wall 22 bottom plate 221 through hole 23 connecting flange 24 first convex portion 25 second convex portion 30 movable contactor 30a right end portion 30b left end portion 30c side surface 30d side surface 31 first protrusion 32 second protrusion 33 third protrusion 34 first base portion 35 second base portion 41 first magnet 42 second magnet 45 first holder 46 second holder 51 movable shaft 52 holder

Claims

1. a first fixed terminal including a first fixed contact; a second fixed terminal located to the left of the first fixed terminal and including a second fixed contact; a movable contact including a first protrusion that is in contact with or spaced apart from the first fixed contact; A first magnet facing the movable contact; Equipped with The first magnet is provided to the right of the right end of the movable contact, the first protrusion overlaps with the first fixed contact in a top view, The right end of the first fixed contact is to the left of the right end of the movable contact and to the right of the right end of the first protrusion. relay.

2. The length, which is the distance from the right end to the left end of the movable contact, is greater than the width of the movable contact, The first magnet overlaps with the movable contact when viewed from the right.

2. The relay of claim 1.

3. The left end of the second fixed contact is located to the right of the left end of the movable contact. A relay as claimed in claim 1 or 2.

4. The first fixed contact overlaps with the movable contact in a top view, The outer edge of the first fixed contact is located inside the outer edge of the movable contact when viewed from above. A relay as claimed in claim 1 or 2.

5. The movable contact further includes a first base portion; the first base portion is located to the right of the first protrusion, The distance between the first protrusion and the first fixed terminal is smaller than the distance between the first base and the first fixed terminal. A relay as claimed in claim 1 or 2.

6. The upper surface of the first protrusion contacts the first fixed contact. A relay as claimed in claim 1 or 2.

7. A second magnet facing the movable contact, The second magnet is provided to the left of the left end of the movable contact, The second magnet overlaps with the movable contact when viewed from the left. A relay as claimed in claim 1 or 2.

8. The first magnet and the second magnet are arranged so as to face each other with the same pole.

8. A relay as claimed in claim 7.

9. A case for covering the movable contact is further provided. When viewed from above, the shortest distance between the inner surface of the case and the right end surface of the movable contact is smaller than the shortest distance between the inner surface of the case and a side surface connecting the right end surface and the left end surface of the movable contact.

8. A relay as claimed in claim 7.

10. the first fixed terminal and the second fixed terminal are inserted into the case, The case is located between the first magnet and the second magnet.

10. The relay of claim 9.

11. The movable contact further has a second protrusion, The second projection overlaps with the second fixed contact in a top view. A relay as claimed in claim 1 or 2.

12. The movable contact further includes a third protrusion arranged alongside the second protrusion, the third projection overlaps with the second fixed contact in a top view, The second fixed contact is in contact with or separated from the second protrusion or the third protrusion.

12. The relay of claim 11.

13. The movable contact further includes a third protrusion arranged alongside the second protrusion, the third projection overlaps with the second fixed contact in a top view, The second fixed contact is in contact with or spaced apart from both the second protrusion and the third protrusion.

12. The relay of claim 11.

14. the second protrusion and the third protrusion are located on an upper surface of the movable contact, The movable contact is arranged in a direction perpendicular to the direction of current flow.

13. The relay of claim 12.

15. The shortest distance between the second protrusion and the third protrusion increases as the protrusion approaches the left end of the movable contact.

13. The relay of claim 12.

16. The upper surface of the first base portion is inclined downward toward the right end of the movable contact.

6. A relay as claimed in claim 5.

17. The movable contact further includes a second base portion; the second base portion is located to the left of the second protrusion, a distance between the second protrusion and the second fixed terminal is smaller than a distance between the second base and the second fixed terminal; The upper surface of the second base portion is inclined downward toward the left end of the movable contact.

12. The relay of claim 11.