Electromagnetic relay

Abstract

The utility model provides an electromagnetic relay. The electromagnetic relay comprises a container; a first fixed terminal; a second fixed terminal; a movable contact having: a surface; a first movable contact that can be brought into contact with the first fixed contact; and a second movable contact capable of being in contact with the second fixed contact, the first movable contact including: a first outer edge; a second outer edge longer than the first outer edge; a third outer edge that approaches a third inner surface of the container from the first outer edge toward the second outer edge; and a fourth outer edge that approaches a fourth inner surface of the container from the first outer edge toward the second outer edge, the second movable contact including: a fifth outer edge; a sixth outer edge longer than the fifth outer edge; a seventh outer edge that approaches a third inner surface of the container from the fifth outer edge toward the sixth outer edge; and an eighth outer edge that approaches the fourth inner surface of the container from the fifth outer edge toward the sixth outer edge. Therefore, the arc can be reliably stretched, and the arc extinguishing capability is improved.

Description

Technical Field

[0001] This utility model relates to an electromagnetic relay. Background Technology

[0002] Previously, for example, Patent Document 1 disclosed an electromagnetic relay in which the movable contact is separated from the fixed terminal. This relay includes a contact section consisting of two movable contacts and two fixed contacts, and the relay is switched between a closed position and an open position by making the movable contacts contact or separate from the fixed contacts.

[0003] However, in the aforementioned relay, the two movable contacts are located at the left and right ends of the movable contact. In this case, when the movable contact separates from the fixed contact, the electric arc generated between them may fly directly out from the left and right end faces of the movable contact in a direction perpendicular to the end faces. This will cause the arc direction to be parallel to the magnetic flux direction of the magnet used for arc extinguishing, and the magnetic flux of the magnet will not be able to generate a Lorentz force on the arc, thus failing to effectively stretch the arc for arc extinguishing. Moreover, the distance between the left and right end faces of the movable contact and the inner surface of the housing used to house the movable contact is usually small, which also leads to the inability to effectively stretch the arc for arc extinguishing.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Invention Patent Application JP2021-051978A Utility Model Content

[0007] Problems to be solved by utility models

[0008] This application was made in view of the above-mentioned situation, and its purpose is to provide an electromagnetic relay that can reliably stretch an electric arc to improve its arc extinguishing capability.

[0009] Solution for solving the problem

[0010] One technical solution of this utility model provides an electromagnetic relay, characterized in that it includes: a container having: a first inner surface; a second inner surface disposed opposite to the first inner surface; a third inner surface connecting the first inner surface and the second inner surface; and a fourth inner surface disposed opposite to the third inner surface and connecting the first inner surface and the second inner surface; a first fixed terminal having a first fixed contact disposed within the container; and a second fixed terminal. It has a second fixed contact disposed within the container between the first fixed contact and the second inner surface; and a movable contact that moves vertically between a first position and a second position, wherein in the first position the movable contact is in contact with both the first and second fixed contacts, and in the second position the movable contact is not in contact with either the first or second fixed contacts. The movable contact has: a surface; and a first movable contact extending from the surface. A first movable contact protrudes toward the first fixed contact side, and when the movable contact is in the first position, the first movable contact contacts the first fixed contact; and a second movable contact protrudes from the surface toward the second fixed contact side, and when the movable contact is in the first position, the second movable contact contacts the second fixed contact. In a top view, the first movable contact includes: a first outer edge; and a second outer edge located closer to the second movable contact than the first outer edge, the length of which is... The length of the first outer edge is longer than that of the second outer edge; the third outer edge is located inside the outer edge of the movable contact and connects the first outer edge and the second outer edge in such a way that they approach the third inner surface from the first outer edge toward the second outer edge; and the fourth outer edge is located inside the outer edge of the movable contact and is located closer to the fourth inner surface than the third outer edge, and connects the first outer edge and the second outer edge in such a way that they approach the fourth inner surface from the first outer edge toward the second outer edge.

[0011] Preferably, in a top-view perspective, the second movable contact includes: a fifth outer edge; a sixth outer edge located closer to the first movable contact than the fifth outer edge, the sixth outer edge being longer than the fifth outer edge; a seventh outer edge located inside the outer edge of the movable contact, connecting the fifth and sixth outer edges in a manner that approaches the third inner surface from the fifth outer edge toward the sixth outer edge; and an eighth outer edge located inside the outer edge of the movable contact and located closer to the fourth inner surface than the seventh outer edge, connecting the fifth and sixth outer edges in a manner that approaches the fourth inner surface from the fifth outer edge toward the sixth outer edge.

[0012] Preferably, from a top-down view, the straight line passing through the midpoint of the first outer edge and the midpoint of the second outer edge intersects the fifth outer edge and the sixth outer edge.

[0013] Preferably, from a top-down view, the straight line passing through the midpoint of the first outer edge and the midpoint of the second outer edge passes through the midpoint of the fifth outer edge and the midpoint of the sixth outer edge.

[0014] Preferably, from a top-down view, the straight line passing through the midpoint of the first outer edge and the midpoint of the second outer edge overlaps with the centerline of the movable contact.

[0015] Preferably, the first movable contact has: a first contact surface opposite to the first fixed contact; a first inclined portion including the first outer edge, the third outer edge, and the fourth outer edge, the first inclined portion connecting the first contact surface and the surface; and a second inclined portion including the second outer edge, the second inclined portion connecting the first contact surface and the surface, wherein the protrusion amount of the first movable contact varies in such a way that, compared to the case where the contact travels from the surface through the second inclined portion toward the first contact surface, the protrusion amount of the first movable contact changes gradually when traveling from the surface through the first inclined portion toward the first contact surface.

[0016] Preferably, the second movable contact has: a second contact surface opposite to the second fixed contact; a third inclined portion including the fifth outer edge, the seventh outer edge, and the eighth outer edge, the third inclined portion connecting the second contact surface and the surface; and a fourth inclined portion including the sixth outer edge, the fourth inclined portion connecting the second contact surface and the surface, wherein the protrusion of the second movable contact varies in such a way that, compared to the case where the contact moves from the surface through the fourth inclined portion toward the second contact surface, the protrusion of the second movable contact changes gradually when moving from the surface through the third inclined portion toward the second contact surface.

[0017] Another technical solution of this utility model provides an electromagnetic relay, characterized in that it includes: a container; a first fixed terminal having a first fixed contact disposed within the container; and a movable contact that moves toward the first fixed contact, the movable contact including the first movable contact protruding toward the first fixed contact, the movable contact contacting the first fixed contact by moving toward the first fixed contact, the width of the first movable contact becoming narrower toward the first tip of the movable contact.

[0018] Preferably, it further includes: a second fixed terminal having a second fixed contact disposed within the container; the movable contact includes a second movable contact protruding toward the second fixed contact; the second movable contact contacts the first fixed contact when in contact with the first fixed contact; the first movable contact is located between the second movable contact and the first tip; the second movable contact is located between the first movable contact and the second tip of the movable contact; the width of the second movable contact narrows towards the second tip.

[0019] Preferably, the first movable contact has: a second outer edge; and a third outer edge and a fourth outer edge, the third outer edge and the fourth outer edge extending from the second outer edge toward the first tip, the third outer edge extending toward the first tip in a direction approaching the fourth outer edge, and the fourth outer edge extending toward the first tip in a direction approaching the third outer edge. The second movable contact has: a sixth outer edge; and a seventh outer edge and an eighth outer edge, the seventh outer edge and the eighth outer edge extending from the sixth outer edge toward the second tip, the seventh outer edge extending toward the second tip in a direction approaching the eighth outer edge, and the eighth outer edge extending toward the second tip in a direction approaching the seventh outer edge.

[0020] Effects of the utility model

[0021] According to this invention, an electromagnetic relay capable of reliably stretching an electric arc to improve its arc-extinguishing capability can be provided. Attached Figure Description

[0022] Figure 1 This is a perspective view of the electromagnetic relay of this utility model.

[0023] Figure 2 This is a front view of the electromagnetic relay of this utility model.

[0024] Figure 3 This is a top view of the electromagnetic relay of this utility model.

[0025] Figure 4 yes Figure 2 A sectional view from the AA direction.

[0026] Figure 5 yes Figure 3 A sectional view of BB from the bottom.

[0027] Figure 6 This is a perspective view of the movable contact of the electromagnetic relay of this utility model.

[0028] Figure 7This is a top view of the movable contact of the electromagnetic relay of this utility model.

[0029] Figure 8 This is a side view of the movable contact of the electromagnetic relay of this utility model.

[0030] Figure 9 This is an enlarged perspective view of one end of the movable contact of the electromagnetic relay of this utility model.

[0031] Figure 10 This is an enlarged perspective view of one end of the movable contact of the electromagnetic relay of this utility model from another angle.

[0032] Figure 11 This is the utility model Figure 7 A sectional view from the CC direction.

[0033] Figure 12 This is an enlarged cross-sectional view of one end of the movable contact of the electromagnetic relay of this utility model.

[0034] Figure 13 This is an enlarged cross-sectional view of the other end of the movable contact of the electromagnetic relay of this utility model.

[0035] Figure 14 This is the utility model Figure 7 A sectional view from the DD direction.

[0036] Figure 15 This is a top view of a modified example of this utility model.

[0037] Explanation of reference numerals in the attached figures

[0038] 100. Electromagnetic relay; 10. First fixed terminal; 11. First fixed contact; 20. Second fixed terminal; 21. Second fixed contact; 30. Movable contact; 31. Surface; 32. First movable contact; 33. Second movable contact; 34. First base; 35. Second base; 36. Outer edge of movable contact; 321. First contact surface; 322. First outer edge; 323. Second outer edge; 324. Third outer edge; 325. Fourth outer edge; 331. Second contact surface; 332. Fifth outer edge; 333. Sixth outer edge; 334. Seventh outer edge; 335. Eighth outer edge; 325a. Curved surface; 325b. Plane; 324a. Curved surface; 324b. Plane; 322a. Curved surface; 322 b. Plane; 332a. Curved surface; 332b. Plane; 41. First magnet; 42. Second magnet; 43. First yoke; 44. Second yoke; 60. Container; 61. First inner surface; 62. Second inner surface; 63. Third inner surface; 64. Fourth inner surface; 631. Protruding curved part; 632. Protruding curved part; 641. Protruding curved part; 642. Protruding curved part; 70. Shell; 71. Top surface; 81. Press spring; 82. Spring base; 83. Movable shaft; 84. Return spring; 85. Movable iron core; 86. Coil; 87. Upper yoke; O1. Intersection; O2. Intersection; O3. Intersection; O4. Intersection; O5. Intersection; O6. Intersection; A. Angle; B. Angle; C. Angle. Detailed Implementation

[0039] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. However, this utility model is not limited to the drawings and the following description. Furthermore, for ease of explanation, the terms "upper," "lower," "left," "right," "front," and "rear" are used in the specification and claims. Those skilled in the art will understand that these terms only indicate relative positional relationships and do not limit the actual installation direction. "Upper," "lower," "left," "right," "front," and "rear" correspond to "+Z," "-Z," "-Y," "+Y," "+X," and "-X" in the accompanying drawings, respectively.

[0040] exist Figure 1 A perspective view of the electromagnetic relay 100 is shown. Figure 2 The image shows a front view of the electromagnetic relay 100. Figure 3 The image shows a top view of the electromagnetic relay 100.

[0041] like Figure 1 As shown, the electromagnetic relay 100 has a first fixed terminal 10 and a second fixed terminal 20 protruding upwards. (As indicated...) Figure 2 As shown, with the housing 70 installed, the first fixing terminal 10 and the second fixing terminal 20 are connected via a portion 71 provided on the top surface of the housing 70 (see reference). Figure 1 The through hole protrudes upward relative to the top surface 71.

[0042] Figure 4 yes Figure 2 A sectional view from the AA direction. Figure 5 yes Figure 3 A sectional view from the bottom (BB) direction. For example... Figure 4 , Figure 5 As shown, a container 60 is housed within the housing 70. The internal structure of the container 60 will be described later. A first magnet 41 and a second magnet 42 are respectively arranged on the +Y side and -Y side of the container 60, that is, the first magnet 41 and the second magnet 42 are opposite each other in the left-right direction. The container 60 is disposed between the first magnet 41 and the second magnet 42. A first yoke 43 and a second yoke 44 are respectively arranged on the -X side and +X side of the container 60, that is, the first yoke 43 and the second yoke 44 are opposite each other in the front-back direction. The container 60 is disposed between the first yoke 43 and the second yoke 44. The first yoke 43 and the second yoke 44 are used to hold the first magnet 41 and the second magnet 42. The first magnetic yoke 43 and the second magnetic yoke 44 are roughly in the shape of the Japanese character "コ". By being positioned on the -X and +X sides of the container 60, they surround the outer periphery of the container 60, the first magnet 41, and the second magnet 42, specifically surrounding the -X and +X sides of the container 60, and the +Y side of the first magnet 41 and the -Y side of the second magnet 42. A gap is provided between each of the first and second magnetic yokes 43 and 44 at their respective ends.

[0043] The top surface 71 of the housing 70 covers the first magnetic yoke 43, the second magnetic yoke 44, the first magnet 41, and the second magnet 42. An unshown hole is present on the inner surface of the top surface 71. Protrusions are present on the first magnetic yoke 43 and the second magnetic yoke 44. The first magnetic yoke 43 and the second magnetic yoke 44 are fixed to the top surface 71 of the housing 70 by pressing the protrusions of the first magnetic yoke 43 and the second magnetic yoke 44 into the hole of the top surface 71 of the housing 70. A second fixing terminal 20 is disposed to the left (-Y side) of the first fixing terminal 10. A movable contact 30 is disposed below the first fixing terminal 10 and the second fixing terminal 20.

[0044] In container 60, the first fixed terminal 10 and the second fixed terminal 20 are arranged along the Y direction. The first fixed terminal 10 is located inside container 60 on the +Y side and is opposite to the first magnet 41 located outside container 60 on the +Y side in the Y direction. The second fixed terminal 20 is located inside container 60 on the -Y side and is opposite to the second magnet 42 located outside container 60 on the -Y side in the Y direction.

[0045] Figure 5The internal structure of container 60 is shown. An electromagnetic relay 100 has a movable contact 30 inside container 60, located below the first fixed terminal 10 and the second fixed terminal 20. The movable contact 30 moves upward and downward between a first position and a second position. In the first position, the movable contact 30 contacts the first fixed terminal 10 and the second fixed terminal 20, electrically connecting them. In the second position, the movable contact 30 does not contact the first fixed terminal 10 and the second fixed terminal 20, electrically insulating them. Figure 5 The image shows position 2, with position 1 positioned above position 2.

[0046] Alternatively, the movable contact 30 may be located above the first fixed terminal 10 and the second fixed terminal 20. Furthermore, the first fixed terminal 10 and the second fixed terminal 20 are arranged in a left-right direction. Figure 5 The first magnet 41 and the second magnet 42 are arranged in the same left-right direction as the container 60, that is, the arrangement direction of the first fixed terminal 10 and the second fixed terminal 20 is the same as the arrangement direction of the first magnet 41 and the second magnet 42. In this case, the magnetic poles of the magnetic pole face of the first magnet 41 facing the container 60 are different from those of the magnetic pole face of the second magnet 42 facing the container 60.

[0047] However, the arrangement direction of the first magnet 41 and the second magnet 42 may differ from the arrangement direction of the first fixed terminal 10 and the second fixed terminal 20. For example, the first magnet 41 and the second magnet 42 may be opposite each other in the front-back direction, and the first yoke 43 and the second yoke 44 may be opposite each other in the left-right direction. Conversely, the arrangement direction of the first magnet 41 and the second magnet 42 may be left-right, and the arrangement direction of the first fixed terminal 10 and the second fixed terminal 20 may be front-back. When the arrangement direction of the first magnet 41 and the second magnet 42 differs from the arrangement direction of the first fixed terminal 10 and the second fixed terminal 20, the magnetic poles of the magnetic pole surfaces of the first magnet 41 facing the container 60 and the magnetic pole surfaces of the second magnet 42 facing the container 60 have the same magnetic poles.

[0048] Similarly, as Figure 5 As shown, the first magnet 41 is located on the +Y side of the movable contact 30 (refer to...). Figure 1 (To the right), the second magnet 42 is located on the -Y side of the movable contact 30 (refer to...). Figure 1(Left side). The movable contact 30 housed in the container 60 moves vertically, thereby moving between positions of contact and separation with the first fixed terminal 10 and the second fixed terminal 20. The first magnet 41 and the second magnet 42 extend vertically throughout the range of movement of the movable contact 30. More preferably, the lower ends of the first magnet 41 and the second magnet 42 are lower than the lower limit of the range of movement of the movable contact 30, and the upper ends of the first magnet 41 and the second magnet 42 are approximately flush with the upper surface of the container 60.

[0049] like Figure 5 As shown, at least a portion of the first magnetic yoke 43 is located on the +Y side of the first magnet 41, and at least another portion of the first magnetic yoke 43 is located on the -Y side of the second magnet 42. The sides of the first magnetic yoke 43 opposite to the first magnet 41 and the second magnet 42 are respectively provided with protrusions that project towards the first magnet 41 and the second magnet 42. These protrusions support the first magnet 41 and the second magnet 42 from below, thereby effectively suppressing downward misalignment of the magnets. The first magnet 41 and the second magnet 42 are used to eliminate electric arcs. By suppressing the misalignment of the first magnet 41 and the second magnet 42, arc elimination can be stably achieved based on the magnets.

[0050] like Figure 4 As shown, the container 60 has: a first inner surface 61; a second inner surface 62 disposed opposite to the first inner surface 61; a third inner surface 63 connecting the first inner surface 61 and the second inner surface 62; and a fourth inner surface 64 disposed opposite to the third inner surface 63, connecting the first inner surface 61 and the second inner surface 62. Protruding curved portions 631 and 632 protrude from the third inner surface 63 toward the fourth inner surface 64, and protruding curved portions 641 and 642 protrude from the fourth inner surface 64 toward the third inner surface 63. The protruding curved portions 631 and 641 can contact the retaining member holding the movable contact 30, suppressing the movable contact 30 from rotating in the horizontal plane during vertical movement. The protruding curved portions 631, 632, 641, and 642 extend vertically and protrude in an arc shape. Preferably, the arc-shaped protruding curved portions 631, 632, 641, and 642 extend throughout the vertical direction within the range of movement of the retainer. This suppresses the degree of friction caused by contact with the retainer.

[0051] exist Figure 5 The transmission mechanism of the electromagnetic relay 100 is also shown. The transmission mechanism includes a compression spring 81, a spring base 82, a movable shaft 83, a return spring 84, a movable iron core 85, and a coil 86.

[0052] like Figure 5As shown, the compression spring 81 pushes the movable contact 30 upwards. The lower end of the compression spring 81 is fixed to the spring base 82, which is located between the compression spring 81 and the bottom of the retainer, providing electrical insulation between the compression spring 81 and the retainer. The upper end of the movable shaft 83 is connected to the spring base 82. The lower end of the movable shaft 83 is connected to the movable iron core 85. The return spring 84 always applies force downwards to the movable iron core 85. The coil 86 is configured to move the movable iron core 85 upwards when energized.

[0053] In the initial state, coil 86 is not energized. Under the action of return spring 84, movable iron core 85 is pressed downward, and movable shaft 83 is also in a downward position. At this time, movable contact 30 is separated from first fixed terminal 10 and second fixed terminal 20.

[0054] When the coil 86 is energized, the movable iron core 85 overcomes the force of the return spring 84 and is pushed upward. At the same time, the movable shaft 83 is also pushed upward, so that the movable contact 30 contacts the first fixed terminal 10 and the second fixed terminal 20.

[0055] like Figure 5 As shown, an upper magnetic yoke 87 is provided above the movable contact 30, and a lower magnetic yoke is provided below the upper magnetic yoke 87, below the movable contact 30, and to the side of the movable contact 30.

[0056] like Figure 5 As shown, the first fixed terminal 10 has a first fixed contact 11 disposed within the container 60, and the second fixed terminal 20 has a second fixed contact 21 disposed within the container 60 between the first fixed contact 11 and the second inner surface 62. In a first position, the movable contact 30 is in contact with both the first fixed contact 11 and the second fixed contact 21; in a second position, the movable contact 30 is not in contact with either the first fixed contact 11 or the second fixed contact 21.

[0057] Figures 6-8 These are, respectively, a perspective view, a top view, and a side view of the movable contact 30 of the electromagnetic relay 100. For example... Figure 6 As shown, the movable contact 30 has: a surface 31; a first movable contact 32 protruding from the surface 31 toward the first fixed contact 11, which contacts the first fixed contact 11 when the movable contact 30 is in the first position; and a second movable contact 33 protruding from the surface 31 toward the second fixed contact 21, which contacts the second fixed contact 21 when the movable contact 30 is in the first position. Furthermore, the first movable contact 32 is located between the second movable contact 33 and the first tip 37, and the second movable contact 33 is located between the first movable contact 32 and the second tip 38.

[0058] like Figure 7 As shown, the width of the first movable contact 32 becomes narrower towards the first tip 37 of the movable contact 30, and the width of the second movable contact 33 becomes narrower towards the second tip 38. Specifically, from a top-down view, the first movable contact 32 includes: a first outer edge 322; a second outer edge 323 located closer to the second movable contact 33 than the first outer edge 322, the second outer edge 323 being longer than the first outer edge 322; a third outer edge 324 located inside the outer edge 36 of the movable contact 30, connecting the first outer edge 322 and the second outer edge 323 in a manner that approaches the third inner surface 63 (-X side) from the first outer edge 322 toward the second outer edge 323; and a fourth outer edge 325 located inside the outer edge 36 of the movable contact 30 and located closer to the fourth inner surface 64 (+X side) than the third outer edge 324, connecting the first outer edge 322 and the second outer edge 323 in a manner that approaches the fourth inner surface 64 from the first outer edge 322 toward the second outer edge 323. In other words, the third outer edge 324 and the fourth outer edge 325 extend from the second outer edge 323 toward the first top edge 37. The third outer edge 324 extends toward the first top edge 37 and then toward the fourth outer edge 325, and the fourth outer edge 325 extends toward the first top edge 37 and then toward the third outer edge 324. As a result, the electric arc generated between the first fixed contact 11 and the first movable contact 32 can fly out rearward from the rear side of the movable contact 30 via the third outer edge 324, or fly forward from the front side of the movable contact 30 via the fourth outer edge 325. The direction of the electric arc intersects the direction of the magnetic flux of the first magnet 41, and the magnetic flux of the first magnet 41 generates a large Lorentz force on the electric arc. Moreover, the space between the inner surface of the container 60 and the rear or front side of the movable contact 30 is large, which is conducive to stretching the electric arc and extinguishing it.

[0059] In addition, such as Figure 7As shown, in a top-down view, the second movable contact 33 includes: a fifth outer edge 332; a sixth outer edge 333 located closer to the first movable contact 32 than the fifth outer edge 332, the sixth outer edge 333 being longer than the fifth outer edge 332; a seventh outer edge 334 located inside the outer edge 36 of the movable contact 30, connecting the fifth outer edge 332 and the sixth outer edge 333 in a manner that approaches the third inner surface 63 (-X side) from the fifth outer edge 332 toward the sixth outer edge 333; and an eighth outer edge 335 located inside the outer edge 36 of the movable contact 30 and located closer to the fourth inner surface 64 (+X side) than the seventh outer edge 334, connecting the fifth outer edge 332 and the sixth outer edge 333 in a manner that approaches the fourth inner surface 64 from the fifth outer edge 332 toward the sixth outer edge 333. In other words, the 7th outer edge 334 and the 8th outer edge 335 extend from the 6th outer edge 333 toward the 2nd apex 38. The 7th outer edge 334 extends toward the 2nd apex 38 and then toward the 8th outer edge 335. The 8th outer edge 335 extends toward the 2nd apex 38 and then toward the 7th outer edge 334. In other words, the 3rd outer edge 324 and the 4th outer edge 325 extend from the 2nd outer edge 323 toward the 1st apex 37. The 3rd outer edge 324 extends toward the 1st apex 37 and then toward the 4th outer edge 325. The 4th outer edge 325 extends toward the 1st apex 37 and then toward the 3rd outer edge 324. Therefore, the electric arc generated between the second fixed contact 21 and the second movable contact 33 can fly out from the rear side of the movable contact 30 via the seventh outer edge 334, or fly out from the front side of the movable contact 30 via the eighth outer edge 335. The direction of the electric arc intersects with the direction of the magnetic flux of the second magnet 42. The magnetic flux of the second magnet 42 generates a large Lorentz force on the electric arc. Moreover, the space between the inner surface of the container 60 and the rear or front side of the movable contact 30 is large, which is conducive to stretching the electric arc and extinguishing it.

[0060] The first movable contact 32 has: a first contact surface 321 opposite to the first fixed contact 11; a first inclined portion including a first outer edge 322, a third outer edge 324 and a fourth outer edge 325, the first inclined portion connecting the first contact surface 321 and the surface 31; and a second inclined portion including a second outer edge 323, the second inclined portion connecting the first contact surface 321 and the surface 31. The protrusion of the first movable contact 32 varies in such a way that, compared to the case where it moves from the surface 31 through the second inclined portion toward the first contact surface 321, the protrusion of the first movable contact 32 changes gradually when it moves from the surface 31 through the first inclined portion toward the first contact surface.

[0061] The second movable contact 33 has: a second contact surface 331 opposite to the second fixed contact 21; a third inclined portion including a fifth outer edge 332, a seventh outer edge 334 and an eighth outer edge 335, the third inclined portion connecting the second contact surface 331 and the surface 31; and a fourth inclined portion including a sixth outer edge 333, the fourth inclined portion connecting the second contact surface 331 and the surface 31. The protrusion of the second movable contact 33 varies in such a way that, compared to the case where it moves from the surface 31 through the fourth inclined portion toward the second contact surface 331, the protrusion of the second movable contact 33 changes gradually when it moves from the surface 31 through the third inclined portion toward the second contact surface.

[0062] like Figure 6 As shown, a first base 34 is provided on the outer side of the first movable contact 32, that is, on the side of the first movable contact 32 opposite to the second movable contact 33, and the first base 34 is located at the right end of the movable contact 30. A second base 35 is provided on the outer side of the second movable contact 33, that is, on the side of the second movable contact 33 opposite to the first movable contact 32, and the second base 35 is located at the left end of the movable contact 30. The distance between the first movable contact 32 and the first fixed contact 11 is less than the distance between the first base 34 and the first fixed contact 11. The distance between the second movable contact 33 and the second fixed contact 21 is less than the distance between the second base 35 and the second fixed contact 21.

[0063] The first base 34 slopes downwards towards the right, away from the first movable contact 32, and the second base 35 slopes downwards towards the left, away from the second movable contact 33. The first base 34 is formed as an inclined surface, thereby further increasing the distance between the first base 34 and the first fixed contact 11. The second base 35 is formed as an inclined surface, thereby further increasing the distance between the second base 35 and the second fixed contact 21.

[0064] Based on the first base 34 and the second base 35 described above, even if the movable contact 30 tilts in the left-right direction when moving from the closed position to the open position, it can still be ensured that the distance between the first movable contact 32 and the first fixed contact 11 is less than the distance between the first base 34 and the first fixed contact 11. Therefore, an electric arc can be generated between the smaller distance between the first movable contact 32 and the first fixed contact 11, but not between the first base 34 and the first fixed contact 11. Similarly, it can be ensured that the distance between the second movable contact 33 and the second fixed contact 21 is less than the distance between the second base 35 and the second fixed contact 21. Therefore, an electric arc can be generated between the smaller distance between the second movable contact 33 and the second fixed contact 21, but not between the second base 35 and the second fixed contact 21.

[0065] Figure 9 This is an enlarged 3D view of one end of the movable contact 30. Figure 10 This is a magnified three-dimensional view of one end of the movable contact 30 from another angle. Figure 11 yes Figure 7 A sectional view from the CC direction. Figure 12 This is an enlarged cross-sectional view of one end of the movable contact 30. Figure 13 This is an enlarged cross-sectional view of the other end of the movable contact 30. Figure 14 yes Figure 7 A sectional view from the DD direction.

[0066] like Figure 7 , Figure 9 , Figure 10 , Figure 12 As shown, the first outer edge 322 is the right edge of the first movable contact 32, and has a curved surface 322a and a flat surface 322b. The curved surface 322a is connected to the first contact surface 321, and the flat surface 322b is connected to the surface 31 of the movable contact 30. The second outer edge 323 is the left edge of the first movable contact 32, and is an inclined surface. The third outer edge 324 is the rear edge of the first movable contact 32, and has a curved surface 324a and a flat surface 324b. The fourth outer edge 325 is the front edge of the first movable contact 32, and has a curved surface 325a and a flat surface 325b.

[0067] The second movable contact 33 can be the same as the first movable contact 32 and have a mirror-symmetrical structure, such as... Figure 13 As shown, the fifth outer edge 332 is the left edge of the second movable contact 33. The fifth outer edge 332 has a curved surface 332a and a flat surface 332b. The curved surface 332a is connected to the second contact surface 331, and the flat surface 332b is connected to the surface 31 of the movable contact 30. The sixth outer edge 333 is the right edge of the second movable contact 33, and may have the same structure as the second outer edge 323 and be mirror-symmetrical. The seventh outer edge 334 is the rear edge of the second movable contact 33, and may have the same structure as the third outer edge 324 and be mirror-symmetrical. The eighth outer edge 335 is the front edge of the second movable contact 33, and may have the same structure as the fourth outer edge 325 and be mirror-symmetrical.

[0068] like Figure 12 As shown, the protrusion amount of the first movable contact 32 varies in the following manner: compared to the case where it travels from surface 31 through the second inclined portion towards the first contact surface 321, the protrusion amount of the first movable contact 32 changes gradually when it travels from surface 31 through the first inclined portion towards the first contact surface 321. More specifically, in Figure 12In the cross-sectional view, the angle between the imaginary line containing the second inclined portion (second outer edge 323) and the imaginary line containing the first contact surface 321 is called angle A. The angle between the imaginary line connecting intersection point O1 and intersection point O2 and the imaginary line containing the first contact surface 321 is called angle B, where intersection point O1 is... Figure 12 The point where the first contact surface 321 intersects the curved surface 322a in the sectional view, the intersection point O2 is Figure 12 The point where plane 322b intersects surface 31 in the sectional view. In this case, angle A is greater than angle B.

[0069] exist Figure 12 In the angular relationship shown, if the first outer edge 322 is changed to the third outer edge 324 or the fourth outer edge 325, the same conclusion can be reached.

[0070] exist Figure 13 The diagram shows a change in the protrusion amount of the second movable contact 33. (Compared to...) Figure 12 The structure shown is mirror-symmetric. Figure 13 Angle A is the angle between the imaginary line containing the fourth inclined portion (sixth outer edge 333) and the imaginary line containing the second contact surface 331. Angle B is the following angle: connecting the intersection of curved surface 332a and the second contact surface 331 with the intersection of plane 332b and surface 31, an imaginary line is obtained, and the angle between this imaginary line and the imaginary line containing the second contact surface 331 is angle B. Figure 13 Similarly, in [the context of the previous sentence], angle A is greater than angle B. Figure 13 In the angular relationship shown, if the 5th outer edge 332 is changed to the 7th outer edge 334 or the 8th outer edge 335, the same conclusion can be reached.

[0071] Figure 12 Angle A in the middle and Figure 13 Angle A in the equation can be the same or different. Figure 12 Angle B in the middle and Figure 13 The angle B in the equation can be the same or different.

[0072] exist Figure 14 The diagram illustrates the changes in the amount of protrusion from surface 31 towards the first contact surface 321 via the third outer edge 324 and the changes in the amount of protrusion from surface 31 towards the first contact surface 321 via the fourth outer edge 325. Figure 14In the cross-section, intersection point O3 is the intersection of the first contact surface 321 and the curved surface 324a. Intersection point O4 is the intersection of the plane 324b and the surface 31. Intersection point O5 is the intersection of the first contact surface 321 and the curved surface 325a. Intersection point O6 is the intersection of the plane 325b and the surface 31. The angle formed by the imaginary line connecting intersection points O3 and O4 and the imaginary line containing the first contact surface 321 is angle C. The angle formed by the imaginary line connecting intersection points O5 and O6 and the imaginary line containing the first contact surface 321 is also angle C. Preferably, angle C is less than angle B, but it can also be the same as or greater than angle B. The angle C at the third outer edge 324 and the angle C at the fourth outer edge 325 can be the same or different.

[0073] Furthermore, although the changes in the amount of protrusion at the 7th outer edge 334 and the 8th outer edge 335 of the 2nd movable contact 33 are not illustrated, the changes in the amount of protrusion at the 7th outer edge 334 and the 8th outer edge 335 can be compared with... Figure 14 The changes in the amount of protrusion at the third outer edge 324 and the fourth outer edge 325 shown are the same. That is, the changes in the amount of protrusion at the seventh outer edge 334 and the eighth outer edge 335 are gentler than the changes in the amount of protrusion at the fifth outer edge 332, or the changes in the amount of protrusion are the same, or the changes in the amount of protrusion at the fifth outer edge 332 are gentler than the changes in the amount of protrusion at the seventh outer edge 334 and the eighth outer edge 335.

[0074] From a top-down perspective, the straight line passing through the midpoint of the first outer edge 322 and the midpoint of the second outer edge 323 intersects the fifth outer edge 332 and the sixth outer edge 333.

[0075] From a top-down perspective, the straight line passing through the midpoints of the first outer edge 322 and the second outer edge 323 passes through the midpoints of the fifth outer edge 332 and the sixth outer edge 333.

[0076] From a top-down view, the straight line passing through the midpoint of the first outer edge 322 and the midpoint of the second outer edge 323 overlaps with the center line of the movable contact 30.

[0077] This application is not limited to the embodiments described above. Figure 15 The structure of the movable contact 30 is shown as a modified example. Figure 15The structure shown is identical to that in the embodiment, as follows: a first fixed terminal 10 and a second fixed terminal 20 are disposed within a container 60. The first fixed terminal 10 has a first fixed contact 11, and the second fixed terminal 20 has a second fixed contact 21. A movable contact 30 includes a first movable contact 92 protruding toward the first fixed contact 11. As the movable contact 30 moves toward the first fixed contact 11, the first movable contact 92 contacts the first fixed contact 11. The movable contact 30 also includes a second movable contact 93 protruding toward the second fixed contact 21. When the first movable contact 92 contacts the first fixed contact 11, the second movable contact 93 contacts the second fixed contact 21.

[0078] The movable contact 30 has a first tip 37 and a second tip 38, with the first tip 37 located on the +Y side and the second tip 38 located on the -Y side. The first movable contact 92 is located between the second movable contact 93 and the first tip 37, and the second movable contact 93 is located between the first movable contact 92 and the second tip 38.

[0079] Figure 15 The structural difference between the modified example and the embodiment shown lies in the shape of the first movable contact 92 and the second movable contact 93. In the modified example and the embodiment, the width of the first movable contacts 32 and 92 narrows towards the first tip 37 of the movable contact 30, and the width of the second movable contacts 33 and 93 narrows towards the second tip 38. In the modified example, the first movable contact 92 and the second movable contact 93 are triangular.

[0080] like Figure 15 As shown, the first movable contact 92 has: a second outer edge 922; and a third outer edge 923 and a fourth outer edge 924. The third outer edge 923 and the fourth outer edge 924 extend from the second outer edge 922 toward the first tip 37. The third outer edge 923 extends toward the first tip 37 and then toward the fourth outer edge 924. The fourth outer edge 924 extends toward the first tip 37 and then toward the third outer edge 923. The second movable contact 93 has: a sixth outer edge 932; and a seventh outer edge 933 and an eighth outer edge 934, the seventh outer edge 933 and the eighth outer edge 934 extending from the sixth outer edge 932 toward the second top tip 38, the seventh outer edge 933 extending toward the second top tip 38 and approaching the eighth outer edge 934, and the eighth outer edge 934 extending toward the second top tip 38 and approaching the seventh outer edge 933.

[0081] In a modified example, the first movable contact 92 and the second movable contact 93 are mirror images of each other, but they can also be asymmetrical or partially symmetrical. For example, the second outer edge 922 and the sixth outer edge 932 can also be mirror images of each other, while the third outer edge 923 and the fourth outer edge 924 are not mirror images of the seventh outer edge 933 and the eighth outer edge 934.

Claims

1. An electromagnetic relay, characterized in that, include: A container having: a first inner surface; A second inner surface is provided at a position opposite to the first inner surface; a third inner surface connects the first inner surface and the second inner surface; And a fourth inner surface, which is located opposite to the third inner surface, connecting the first inner surface and the second inner surface; A first fixed terminal having a first fixed contact disposed within the container; A second fixing terminal having a second fixing contact disposed within the container such that it is located between the first fixing contact and the second inner surface; and A movable contact moves vertically between a first position and a second position. In the first position, the movable contact is in contact with both the first and second fixed contacts. In the second position, the movable contact is not in contact with either the first or second fixed contacts. The movable contact has: surface; A first movable contact protrudes from the surface toward the first fixed contact, and when the movable contact is in the first position, the first movable contact contacts the first fixed contact; and The second movable contact protrudes from the surface toward the second fixed contact. When the movable contact is in the first position, the second movable contact is in contact with the second fixed contact. From a bird's-eye view The first movable contact includes: First outer edge; The second outer edge is located closer to the second movable contact than the first outer edge, and the length of the second outer edge is longer than the length of the first outer edge; A third outer edge, located inside the outer edge of the movable contact, connects the first outer edge and the second outer edge in such a manner that they approach the third inner surface from the first outer edge toward the second outer edge; and The fourth outer edge is located inside the outer edge of the movable contact and is positioned closer to the fourth inner surface than the third outer edge, connecting the first outer edge and the second outer edge in such a way that they move closer to the fourth inner surface from the first outer edge toward the second outer edge.

2. The electromagnetic relay according to claim 1, characterized in that, From a top-down view, the second movable contact includes: 5th outer edge; The sixth outer edge is located closer to the first movable contact than the fifth outer edge, and the length of the sixth outer edge is longer than the length of the fifth outer edge. A seventh outer edge, located inside the outer edge of the movable contact, connects the fifth and sixth outer edges in such a manner as they approach the third inner surface from the fifth outer edge toward the sixth outer edge; and The 8th outer edge is located inside the outer edge of the movable contact and is positioned closer to the 4th inner surface than the 7th outer edge, connecting the 5th outer edge and the 6th outer edge in such a way that they move closer to the 4th inner surface from the 5th outer edge toward the 6th outer edge.

3. The electromagnetic relay according to claim 2, characterized in that, From a bird's-eye view A straight line passing through the midpoint of the first outer edge and the midpoint of the second outer edge intersects the fifth outer edge and the sixth outer edge.

4. The electromagnetic relay according to claim 3, characterized in that, From a bird's-eye view A straight line passing through the midpoint of the first outer edge and the midpoint of the second outer edge passes through the midpoint of the fifth outer edge and the midpoint of the sixth outer edge.

5. The electromagnetic relay according to claim 1, characterized in that, From a bird's-eye view A straight line passing through the midpoint of the first outer edge and the midpoint of the second outer edge overlaps with the centerline of the movable contact.

6. The electromagnetic relay according to any one of claims 1 to 5, characterized in that, The first movable contact has: The first contact surface is opposite to the first fixed contact point; A first inclined portion, comprising a first outer edge, a third outer edge, and a fourth outer edge, the first inclined portion connecting the first contact surface and the surface; and The second inclined portion, which includes the second outer edge, connects the first contact surface and the surface. The protrusion amount of the first movable contact changes in the following manner: compared to the case where it travels from the surface through the second inclined portion toward the first contact surface, the protrusion amount of the first movable contact changes gradually when it travels from the surface through the first inclined portion toward the first contact surface.

7. The electromagnetic relay according to claim 2, characterized in that, The second movable contact has: The second contact surface is opposite to the second fixed contact point; A third inclined portion, comprising the fifth outer edge, the seventh outer edge, and the eighth outer edge, connects the second contact surface and the surface; and The fourth inclined portion, which includes the sixth outer edge, connects the second contact surface and the surface. The protrusion amount of the second movable contact changes in the following manner: compared to the case where it travels from the surface through the fourth inclined portion toward the second contact surface, the protrusion amount of the second movable contact changes gradually when it travels from the surface through the third inclined portion toward the second contact surface.

8. An electromagnetic relay, characterized in that, include: container; A first fixed terminal having a first fixed contact disposed within the container; as well as The movable contact moves toward the first fixed contact. The movable contact includes a first movable contact that protrudes toward the first fixed contact. The movable contact moves toward the first fixed contact to make contact with the first fixed contact. The width of the first movable contact becomes narrower as it moves toward the first tip of the movable contact.

9. The electromagnetic relay according to claim 8, characterized in that, It also includes: a second fixing terminal having a second fixing contact disposed within the container. The movable contact includes a second movable contact that protrudes toward the second fixed contact. When in contact with the first fixed contact, the second movable contact engages with the second fixed contact. The first movable contact is located between the second movable contact and the first top tip. The second movable contact is located between the first movable contact and the second tip of the movable contact. The width of the second movable contact becomes narrower as it moves towards the second tip.

10. The electromagnetic relay according to claim 9, characterized in that, The first movable contact has: The second outer edge; and The third and fourth outer edges extend from the second outer edge toward the first apex. The third outer edge extends toward the fourth outer edge as it moves toward the first apex. The fourth outer edge extends toward the third outer edge as it moves toward the first apex. The second movable contact has: The sixth outer edge; and The 7th and 8th outer edges extend from the 6th outer edge toward the 2nd apex. The seventh outer edge extends toward the eighth outer edge as it moves toward the second apex. The 8th outer edge extends toward the 7th outer edge as it moves toward the 2nd apex.

Images