Electromagnetic relay

Abstract

The utility model provides an electromagnetic relay. The electromagnetic relay comprises a fixed terminal; a movable contact that moves between a contact position and a separation position, and an upper yoke that is disposed above the movable contact; a holder that holds the upper yoke; and a container in which the movable contact, the upper yoke, and the holder are disposed, the holder having: a bottom portion facing the lower surface of the movable contact; a first leg portion extending upward; a second leg portion extending upward, the second leg portion being aligned with the first leg portion; a first intermediate part located above the first leg part and the second leg part and connecting the first leg part and the second leg part; and a first holding portion located above the first intermediate portion, connected to the first intermediate portion, and holding the upper yoke, the first leg portion having: a first bent portion connected to the bottom portion; and a second curved portion that is positioned above the first curved portion and bends toward the movable contact, the second curved portion being positioned closer to the inner surface of the container than the first curved portion.

Description

Technical Field

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

[0002] Conventional methods, such as those disclosed in Patent Document 1, involve an electromagnetic relay in which the movable contact separates from the fixed terminal. The movable contact is held by a retainer made of a non-magnetic material. While held by the retainer, the movable contact moves up and down to contact or separate from the fixed terminal. Furthermore, to minimize the risk of rotation during this up-and-down movement, the retainer contacts the inner surface of the container holding the movable contact, thereby limiting rotation.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2014-17086 Utility Model Content

[0006] Problems to be solved by utility models

[0007] However, in the aforementioned patent document 1, the retaining member easily rubs against the inner surface of the container during the up-and-down movement of the movable contact, resulting in increased frictional resistance when the movable contact moves up and down. This necessitates increasing the number of coil turns or the current input to the coil, thereby increasing the force required to move the movable contact up and down. This leads to increased manufacturing costs, larger size, or increased power consumption of the device. This invention provides an electromagnetic relay that can reduce the frictional resistance when the movable contact moves up and down.

[0008] Solution for solving the problem

[0009] As a technical solution of this utility model, an electromagnetic relay is characterized by comprising: a first fixed terminal; a second fixed terminal; a movable contact disposed below the first fixed terminal and the second fixed terminal, movable upward and downward between a first position and a second position, wherein in the first position, the movable contact contacts the first fixed terminal and the second fixed terminal, electrically connecting the first fixed terminal and the second fixed terminal, and in the second position, the movable contact does not contact the first fixed terminal and the second fixed terminal, electrically insulating the first fixed terminal and the second fixed terminal; an upper magnetic yoke disposed above the movable contact; a retaining member retaining the upper magnetic yoke; and a container having the movable contact and the second fixed terminal disposed therein. The upper yoke and the retainer have: a bottom opposite to the lower surface of the movable contact; a first leg extending upward from the bottom; a second leg extending upward from the bottom, the second leg being arranged with a gap between it and the first leg; a first intermediate portion located above the first leg and the second leg, connecting the first leg and the second leg; and a first retaining portion located above the first intermediate portion, connected to the first intermediate portion and retaining the upper yoke, the first leg having: a first curved portion connected to the bottom; and a second curved portion located above the first curved portion, curved toward the movable contact, the second curved portion being located closer to the inner surface of the container than the first curved portion.

[0010] Preferably, the first leg also has a first connecting portion that connects the first curved portion and the second curved portion together, the distance between the first connecting portion and the inner surface of the container decreasing as it moves from the first curved portion toward the second curved portion.

[0011] Preferably, the second leg has: a third bend that is connected to the bottom; and a fourth bend that is located above the third bend and bends toward the movable contact, the fourth bend being located closer to the inner surface of the container than the first bend.

[0012] Preferably, the second leg also has a second connecting portion that connects the third and fourth curved portions together, the distance between the second connecting portion and the inner surface of the container decreasing as it moves from the third curved portion toward the fourth curved portion.

[0013] Preferably, the retainer comprises: a third leg extending upward from the bottom; a fourth leg extending upward from the bottom, the fourth leg being arranged with a gap between it and the third leg; a second intermediate portion located above the third and fourth legs, connecting the third and fourth legs; and a second retaining portion located above the second intermediate portion, connected to the second intermediate portion and retaining the upper yoke, the third leg having: a fifth bend connected to the bottom; and a sixth bend located above the fifth bend and closer to the inner surface of the container than the fifth bend, facing towards... The fourth leg has: a 7th bend connected to the bottom; an 8th bend located above and closer to the inner surface of the container than the 7th bend, and a 4th connecting portion that bends toward the movable contact; and a third connecting portion that connects the 5th and 6th bends together, the distance between the 4th leg and the inner surface of the container decreasing from the 5th bend toward the 6th bend.

[0014] Preferably, the first bend is opposite to the fifth bend, the second bend is opposite to the sixth bend, the distance between the second bend and the sixth bend is greater than the distance between the first bend and the fifth bend, the third bend is opposite to the seventh bend, the fourth bend is opposite to the eighth bend, and the distance between the fourth bend and the eighth bend is greater than the distance between the third bend and the seventh bend.

[0015] Preferably, the inner wall surface of the container has at least one protruding curved portion, which protrudes in an arc shape and extends in the vertical direction, and at least one of the protruding curved portions is opposite to at least one of the second, fourth, sixth, and eighth curved portions of the retainer.

[0016] Effects of the utility model

[0017] The electromagnetic relay according to this utility model can effectively suppress the friction between the retaining member and the inner surface of the container, and reduce the frictional resistance when the movable contact moves up and down. Attached Figure Description

[0018] Figure 1 This is a perspective view of the electromagnetic relay of this utility model.

[0019] Figure 2This is a top view of the electromagnetic relay of this utility model.

[0020] Figure 3 This is a front view of the electromagnetic relay of this utility model.

[0021] Figure 4 yes Figure 2 A sectional view from the AA direction.

[0022] Figure 5 yes Figure 2 A sectional view of BB from the bottom.

[0023] Figure 6 yes Figure 3 A sectional view from the CC direction.

[0024] Figure 7 This is a perspective view of the movable contact and transmission mechanism of the electromagnetic relay of this utility model.

[0025] Figure 8 This is a side view of the movable contact and transmission mechanism of the electromagnetic relay of this utility model.

[0026] Figure 9 This is a perspective view of the holding element of the electromagnetic relay of this utility model.

[0027] Explanation of reference numerals in the attached figures

[0028] 100. Electromagnetic relay; 10. First fixed terminal; 20. Second fixed terminal; 30. Movable contact; 40. Upper yoke; 50. Retaining member; 51. Bottom; 52. First leg; 53. Second leg; 54. First intermediate part; 55. First retaining part; 52a. First bent part; 52b. Second bent part; 52c. First connecting part; 53a. Third bent part; 53b. Fourth bent part; 53c. Second connecting part; 56. Third leg; 56a. Fifth bent part; 5 6b. Sixth bend; 56c. Third connecting part; 57. Fourth leg; 57a. Seventh bend; 57b. Eighth bend; 57c. Fourth connecting part; 58. Second intermediate part; 59. Second holding part; 60. Container; 61, 62, 63, 64. Protruding bends; 70. Lower yoke; 80. Transmission mechanism; 81. Press spring; 82. Spring base; 83. Movable shaft; 84. Return spring; 85. Movable iron core; 86. Coil; 90. Housing; 91. Top surface. Detailed Implementation

[0029] 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.

[0030] (1. Summary)

[0031] The electromagnetic relay 100 of this embodiment includes: a first fixed terminal 10; a second fixed terminal 20; a movable contact 30 disposed below the first fixed terminal 10 and the second fixed terminal 20, which 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; an upper yoke 40 disposed above the movable contact 30; a retaining member 50 that retains the upper yoke 40; and a container 60 containing the movable contact 30, the upper yoke 40, and the retaining member 50, holding... The component 50 has: a bottom 51 opposite to the lower surface of the movable contact 30; a first leg 52 extending upward from the bottom 51; a second leg 53 extending upward from the bottom 51, the second leg 53 being arranged with a gap between the first leg 52 and the first leg 53; a first intermediate portion 54 located above the first leg 52 and the second leg 53, connecting the first leg 52 and the second leg 53; and a first retaining portion 55 located above the first intermediate portion 54, connected to the first intermediate portion 54 and retaining the upper yoke 40. The first leg 52 has: a first bent portion 52a connected to the bottom 51; and a second bent portion 52b located above the first bent portion 52a, bent toward the movable contact 30, the second bent portion 52b being located closer to the inner surface of the container 60 than the first bent portion 52a.

[0032] Preferably, the first leg 52 also has a first connecting portion 52c that connects the first bend 52a and the second bend 52b together, and the distance between the first connecting portion 52c and the inner surface of the container 60 decreases as it moves from the first bend 52a toward the second bend 52b.

[0033] Preferably, the second leg 53 has: a third bend 53a connected to the bottom 51; a fourth bend 53b located above the third bend 53a and bent toward the movable contact 30, the fourth bend 53b being located closer to the inner surface of the container 60 than the first bend 52a.

[0034] Preferably, the second leg 53 also has a second connecting portion 53c that connects the third bend 53a and the fourth bend 53b together, and the distance between the second connecting portion 53c and the inner surface of the container 60 decreases as it moves from the third bend 53a toward the fourth bend 53b.

[0035] Preferably, the retainer 50 includes: a third leg 56 extending upward from the bottom 51; a fourth leg 57 extending upward from the bottom 51, the fourth leg 57 and the third leg 56 being arranged with a gap between them; a second intermediate portion 58 located above the third leg 56 and the fourth leg 57, connecting the third leg 56 and the fourth leg 57; and a second retaining portion 59 located above the second intermediate portion 58, connected to the second intermediate portion 58 and retaining the upper yoke 40. The third leg 56 has: a fifth bend 56a connected to the bottom 51; and a sixth bend 56b located above the fifth bend 56a and closer to the inner surface of the container 60 than the fifth bend 56a, facing the movable... The contact 30 is bent; and the third connecting portion 56c connects the fifth bent portion 56a and the sixth bent portion 56b together, and the fourth leg portion 57 has: a seventh bent portion 57a ​​connected to the bottom 51; an eighth bent portion 57b located above the seventh bent portion 57a ​​and closer to the inner surface of the container 60 than the seventh bent portion 57a, bent toward the movable contact 30; and the fourth connecting portion 57c connects the seventh bent portion 57a ​​and the eighth bent portion 57b together, ...

[0036] Preferably, the first bend 52a is opposite to the fifth bend 56a, the second bend 52b is opposite to the sixth bend 56b, the distance between the second bend 52b and the sixth bend 56b is greater than the distance between the first bend 52a and the fifth bend 56a, the third bend 53a is opposite to the seventh bend 57a, the fourth bend 53b is opposite to the eighth bend 57b, and the distance between the fourth bend 53b and the eighth bend 57b is greater than the distance between the third bend 53a and the seventh bend 57a.

[0037] Preferably, the inner wall surface of the container 60 has at least one protruding curved portion 61 to 64, which protrudes in an arc shape and extends in the vertical direction. At least one protruding curved portion 61 to 64 is opposite to at least one of the second curved portion 52b, the fourth curved portion 53b, the sixth curved portion 56b, and the eighth curved portion 57b of the retainer 50.

[0038] (2. Detailed Structure)

[0039] (2-1. Overall)

[0040] Figure 1 This is a 3D view of the electromagnetic relay 100. Figure 2 This is a top view of the electromagnetic relay 100. Figure 3 This is the front view of the electromagnetic relay 100. (Example) Figure 1 As shown, the upper surface of the housing 90 of the electromagnetic relay 100 of this utility model exposes a first fixed terminal 10 and a second fixed terminal 20, which are arranged in the left-right direction (Y direction).

[0041] exist Figure 2 The top view shows the top surface 91 of the housing 90. Figure 3 The front view shown illustrates the structure in which the first fixing terminal 10 and the second fixing terminal 20 protrude from the top surface 91 of the housing 90.

[0042] Figure 4 yes Figure 2 The longitudinal sectional view under the AA direction, in Figure 4 The internal structure of the electromagnetic relay 100 of this utility model is shown in the figure. For example... Figure 4 As shown, a container 60 is housed inside the housing 90. The lower parts of the first fixing terminal 10 and the second fixing terminal 20 are cylindrical, and the upper parts are flanges with a diameter larger than the lower diameter. The first fixing terminal 10 and the second fixing terminal 20 are positioned in the container 60 with their lower parts inside the container 60 and their upper flanges outside the container 60. When installing the housing 90, the upper parts of the first fixing terminal 10 and the second fixing terminal 20 are installed so that they protrude outward relative to the top surface 91 of the housing 90 through a through hole. In addition, a magnet for extinguishing electric arcs is provided on the outer side of the container 60 in the left-right direction or the outer side in the front-back direction. A magnetic yoke is provided between the housing 90 and the container 60, which surrounds the container 60 and the magnet for extinguishing electric arcs in the front-back direction. However, regarding the above-mentioned magnet and magnetic yoke, although... Figure 4 The illustration is shown, but it is not labeled with any reference numerals.

[0043] like Figure 4As shown, the electromagnetic relay 100 has a movable contact 30 inside the container 60, which is 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 4 The image shows position 2, with position 1 positioned above position 2.

[0044] like Figure 4 As shown, a transmission mechanism 80 is also provided within the housing 90. The transmission mechanism 80 is used to move the movable contact 30 up and down between the first position and the second position. The transmission mechanism 80 includes a pressure spring 81, a spring base 82, a movable shaft 83, a return spring 84, a movable iron core 85, and a coil 86.

[0045] like Figure 4 As shown, the compression spring 81 pushes the movable contact 30 upwards. The lower end of the compression spring 81 is supported by a spring base 82, which supports the compression spring 81 from below. The spring base 82 is formed of insulating material. 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.

[0046] 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.

[0047] When energized, coil 86 is powered on, and movable iron core 85 overcomes the force of return spring 84 and is pushed upward. Simultaneously, movable shaft 83 is also pushed upward, causing movable contact 30 to contact the first fixed terminal 10 and the second fixed terminal 20. This causes movable contact 30 to move from the second position to the first position.

[0048] (2-2. Retaining component 50)

[0049] Figure 5 yes Figure 2 The sectional view from the BB direction is a sectional view obtained by cutting the electromagnetic relay 100 along the XZ plane. Figure 6 Figure 3The sectional view taken from the CC direction is a sectional view obtained by cutting the electromagnetic relay 100 along the XY plane. Figure 7 This is a perspective view of the movable contact 30 and the transmission mechanism 80 of the electromagnetic relay 100. Figure 8 This is a side view of the movable contact 30 and the transmission mechanism 80 of the electromagnetic relay 100. Figure 9 This is a perspective view of the retaining element 50 of the electromagnetic relay 100.

[0050] The following is based on Figures 5-9 The structure of the retainer 50 of this application will be described.

[0051] like Figure 5 , Figure 7 As shown, an upper magnetic yoke 40 is located above the movable contact 30, and a lower magnetic yoke 70 is located below the upper magnetic yoke 40, to the side of the movable contact 30, and below the movable contact 30. A retainer 50 is used to retain the movable contact 30 and the upper magnetic yoke 40. The lower magnetic yoke 70 is fixed to the movable contact 30. The movable contact 30, the upper magnetic yoke 40, the lower magnetic yoke 70, and the retainer 50 are all housed within the container 60. By providing the upper magnetic yoke 40 and the lower magnetic yoke 70, a magnetic circuit is formed surrounding the movable contact 30, thereby generating an attractive force through magnetic force. This restricts the movement of the movable contact 30 away from the first fixed terminal 10 and the second fixed terminal 20 due to electromagnetic repulsion, thereby increasing the contact pressure between the movable contact 30 and the first fixed terminal 10 and the second fixed terminal 20.

[0052] like Figure 9 As shown, the retainer 50 has a bottom 51 and four legs 52, 53, 56, and 57 extending from the bottom 51. The bottom 51 faces the lower surface of the movable contact 30, and a through hole is provided in the bottom 51. A spring base 82 is formed by injection molding to fix the retainer 50 to the upper end of the movable shaft 83. The through hole in the bottom 51 helps to improve the bonding force between the spring base 82 and the retainer 50. Figure 7 As shown, a spring base 82 is disposed at the bottom 51, and a compression spring 81 is disposed on the upper surface of the spring base 82, such that the spring base 82 is located between the compression spring 81 and the bottom 51, thereby making the compression spring 81 electrically insulated from the retainer 50.

[0053] like Figure 9As shown, the first leg 52 extends upward from the bottom 51, and the second leg 53 extends upward from the bottom 51, with the second leg 53 arranged with a gap between it and the first leg 52. Above the first leg 52 and the second leg 53 is a first intermediate portion 54, which connects the first leg 52 and the second leg 53. Above the first intermediate portion 54 is a first retaining portion 55, which is connected to the first intermediate portion 54 and located on the -X side of the upper yoke 40. The first retaining portion 55 clamps the upper yoke 40 from both sides in the X direction and is engaged or riveted to the upper yoke 40 by means of a second retaining portion 59 described later. The first leg 52 has: a first bend 52a connected to the bottom 51, the first bend 52a bends upward and extends towards the -X side inner surface of the container 60 as it goes upward; and a second bend 52b located above the first bend 52a, bends upward and toward the movable contact 30, that is, extends away from the -X side inner surface of the container 60 as it goes upward (equivalent to extending toward the +X side as it goes upward), the second bend 52b is located closer to the -X side inner surface of the container 60 than the first bend 52a.

[0054] like Figure 8 As shown, relative to the imaginary dashed line in the figure, the second bend 52b is closer to the imaginary dashed line (closer to the -X side) than the first bend 52a. The imaginary dashed line represents, for example, the inner surface of the container 60 or a plane parallel to the inner surface of the container 60. By adopting this structure, the contact area when the first leg 52 contacts the inner surface of the container 60 can be reduced, thereby reducing the friction when the first leg 52 contacts the inner surface of the container 60. As a result, the frictional resistance when the movable contact 30 moves up and down can be reduced.

[0055] Furthermore, the first leg 52 also has a first connecting portion 52c that connects the first curved portion 52a and the second curved portion 52b together. The distance between the first connecting portion 52c and the inner surface of the container 60 on the -X side decreases as it moves from the first curved portion 52a toward the second curved portion 52b. That is, the first connecting portion 52c moves closer to the inner surface of the container 60 on the -X side as it moves from below toward above.

[0056] like Figure 9As shown, the second leg 53 has: a third bend 53a connected to the bottom 51, the third bend 53a bends upward and extends towards the -X side inner surface of the container 60 as it goes upward; a fourth bend 53b located above the third bend 53a, bends upward and towards the movable contact 30, that is, extends away from the -X side inner surface of the container 60 as it goes upward (equivalent to extending towards the +X side as it goes upward), the fourth bend 53b is located closer to the -X side inner surface of the container 60 than the third bend 53a.

[0057] The second leg 53 also has a second connecting portion 53c that connects the third bend 53a and the fourth bend 53b together. The distance between the second connecting portion 53c and the inner surface of the container 60 on the -X side decreases as it moves from the third bend 53a toward the fourth bend 53b. That is, the second connecting portion 53c moves closer to the inner surface of the container 60 on the -X side as it moves from below toward above.

[0058] The first leg 52 and the second leg 53 stand up from the -X side end of the bottom 51, and the third leg 56 and the fourth leg 57 stand up from the +X side end of the bottom 51.

[0059] like Figure 9 As shown, the third leg 56 extends upward from the bottom 51, and the fourth leg 57 extends upward from the bottom 51, with the fourth leg 57 and the third leg 56 arranged with a gap between them. Above the third leg 56 and the fourth leg 57 is a second intermediate portion 58, which connects the third leg 56 and the fourth leg 57. Above the second intermediate portion 58 is a second retaining portion 59, which is connected to the second intermediate portion 58 and located on the +X side of the upper yoke 40. The second retaining portion 59 clamps the upper yoke 40 from both sides in the X direction with the first retaining portion 55 and is either snapped or riveted to the upper yoke 40, thereby retaining the upper yoke 40. The third leg 56 has: a fifth bend 56a connected to the bottom 51, the fifth bend 56a bends upward and extends towards the +X side inner surface of the container 60 as it goes upward; and a sixth bend 56b located above the fifth bend 56a, bends upward and toward the movable contact 30, that is, extends away from the +X side inner surface of the container 60 as it goes upward (equivalent to extending toward the -X side as it goes upward), the sixth bend 56b is located closer to the +X side inner surface of the container 60 than the fifth bend 56a.

[0060] Furthermore, the third leg 56 also has a third connecting portion 56c, which connects the fifth bend 56a and the sixth bend 56b together. The distance between the third connecting portion 56c and the +X side inner surface of the container 60 decreases as it moves from the fifth bend 56a toward the sixth bend 56b. That is, the third connecting portion 56c moves closer to the +X side inner surface of the container 60 as it moves from below toward above.

[0061] like Figure 9 As shown, the fourth leg 57 has: a seventh bend 57a connected to the bottom 51, the seventh bend 57a bends upward and extends towards the +X side inner surface of the container 60 as it goes upward; and an eighth bend 57b located above the seventh bend 57a, bends upward and toward the movable contact 30, that is, extends away from the +X side inner surface of the container 60 as it goes upward (equivalent to extending toward the -X side as it goes upward), the eighth bend 57b is located closer to the +X side inner surface of the container 60 than the seventh bend 57a.

[0062] Furthermore, the fourth leg 57 also has a fourth connecting portion 57c, which connects the seventh bend 57a and the eighth bend 57b together. The distance between the fourth connecting portion 57c and the +X side inner surface of the container 60 decreases as it moves from the seventh bend 57a toward the eighth bend 57b. That is, the fourth connecting portion 57c moves closer to the +X side inner surface of the container 60 as it moves from below toward above.

[0063] In the X direction, the first bend 52a is opposite to the fifth bend 56a, and the second bend 52b is opposite to the sixth bend 56b. The distance between the second bend 52b and the sixth bend 56b is greater than the distance between the first bend 52a and the fifth bend 56a. In the X direction, the third bend 53a is opposite to the seventh bend 57a, and the fourth bend 53b is opposite to the eighth bend 57b. The distance between the fourth bend 53b and the eighth bend 57b is greater than the distance between the third bend 53a and the seventh bend 57a.

[0064] like Figure 6 As shown, the inner wall surface of container 60 has protruding curved portions 61-64. Figure 6 From the top-down view shown, the protruding curved parts 61-64 protrude in an arc shape and extend in the vertical direction.

[0065] The protruding curved portions 61-64 are used to suppress the rotation of the movable contact 30 by abutting against the retaining member 50 when the movable contact 30 rotates. Specifically, the protruding curved portions 61-64 are respectively the portions opposite to the second curved portion 52b, the fourth curved portion 53b, the sixth curved portion 56b, and the eighth curved portion 57b of the retaining member 50. Figure 6 As shown, the gap between the protruding curved portion 61 and the second curved portion 52b may be smaller, the gap between the protruding curved portion 63 and the sixth curved portion 56b may be smaller, the gap between the protruding curved portion 62 and the fourth curved portion 53b may be larger, and the gap between the protruding curved portion 64 and the eighth curved portion 57b may be larger.

[0066] By setting Figure 6 The structure shown, whether it is the movable contact 30 winding Figure 6 Whether the rotation is clockwise or counterclockwise, the rotation of the movable contact 30 can be reliably suppressed by the protruding curved portion 61 abutting against the second curved portion 52b or the protruding curved portion 63 abutting against the sixth curved portion 56b.

[0067] The size of the smaller gaps, namely the gaps between the protruding curved portion 61 and the second curved portion 52b, and the gaps between the protruding curved portion 63 and the sixth curved portion 56b, are not particularly limited. They can be any size as long as they effectively suppress the rotation of the movable contact 30. Furthermore, the gaps between the protruding curved portion 61 and the second curved portion 52b, and between the protruding curved portion 62 and the fourth curved portion 53b, or the gaps between the protruding curved portion 62 and the fourth curved portion 53b, and between the protruding curved portion 64 and the eighth curved portion 57b, or the gaps between the protruding curved portion 63 and the sixth curved portion 56b, and between the protruding curved portion 64 and the eighth curved portion 57b, can also be set to smaller gaps.

[0068] By making the protruding curved portions 61-64 arc-shaped, the contact area can be further reduced, thereby further reducing friction caused by contact. By making the arc-shaped protruding curved portions 61-64 extend throughout the vertical direction within the holding member 50, the rotation of the movable contact 30 can be reliably suppressed in the vertical direction between the first and second positions. Preferably, all of the protruding curved portions 61-64 are present on the inner surface of the container 60, but it is also possible to have only at least one of the protruding curved portions 61-64. Correspondingly, the holding member 50 may have not only all of the legs, but may also have only at least one of the first leg 52, the second leg 53, the third leg 56, and the fourth leg 57, as long as the protruding curved portions are provided correspondingly to the legs.

[0069] Furthermore, the retaining member 50 of this utility model is not limited to a one-piece structure, but can also be a separate structure. For example, the first retaining part 55 and the second retaining part 59 are not formed on the same bottom 51, but are formed on different bottoms. Such a structure is of course also included within the protection scope of this application.

Claims

1. An electromagnetic relay, characterized in that, have: First fixed terminal; Second fixed terminal; A movable contact is disposed below the first fixed terminal and the second fixed terminal, and moves upward and downward between a first position and a second position. In the first position, the movable contact contacts the first fixed terminal and the second fixed terminal, electrically connecting the first fixed terminal and the second fixed terminal. In the second position, the movable contact does not contact the first fixed terminal and the second fixed terminal, electrically insulating the first fixed terminal and the second fixed terminal. An upper magnetic yoke is positioned above the movable contact; A retainer that holds the upper yoke; and The container, inside which are arranged the movable contact, the upper magnetic yoke, and the retaining member. The retainer has: The bottom surface is opposite to the lower surface of the movable contact. The first leg extends upward from the bottom; The second leg extends upward from the bottom and is arranged with a gap between it and the first leg; The first middle part is located above the first leg and the second leg, connecting the first leg and the second leg; as well as A first retaining part, located above the first intermediate part, is connected to the first intermediate part and retains the upper magnetic yoke. The first leg has: The first curved portion, which is connected to the bottom; and The second curved portion, located above the first curved portion, bends towards the movable contact. The second bend is located closer to the inner surface of the container than the first bend.

2. The electromagnetic relay according to claim 1, characterized in that, The first leg also has a first connecting portion that connects the first curved portion and the second curved portion together. The distance between the first connecting portion and the inner surface of the container decreases as it moves from the first curved portion toward the second curved portion.

3. The electromagnetic relay according to claim 2, characterized in that, The second leg has: The third curved portion is connected to the bottom; The fourth bend, located above the third bend, bends toward the movable contact. The fourth bend is located closer to the inner surface of the container than the first bend.

4. The electromagnetic relay according to claim 3, characterized in that, The second leg also has a second connecting portion that connects the third curved portion and the fourth curved portion together. The distance between the second connecting portion and the inner surface of the container decreases as it moves from the third curved portion toward the fourth curved portion.

5. The electromagnetic relay according to claim 4, characterized in that, The retaining member includes: The third leg extends upward from the bottom; The fourth leg extends upward from the bottom and is arranged with a gap between it and the third leg; The second middle section, located above the third and fourth legs, connects the third and fourth legs; and The second retaining part, located above the second intermediate part, is connected to the second intermediate part and retains the upper magnetic yoke. The third leg has: The fifth bend is connected to the bottom; The sixth bend, located above and closer to the inner surface of the container than the fifth bend, bends toward the movable contact. as well as The third connecting portion, which connects the fifth and sixth curved portions together, decreases in distance from the fifth curved portion toward the sixth curved portion and from the inner surface of the container. The fourth leg has: The seventh bend is connected to the bottom; The eighth bend, located above and closer to the inner surface of the container than the seventh bend, bends toward the movable contact; and The fourth connecting portion connects the seventh and eighth bends together, and the distance between the fourth connecting portion and the inner surface of the container decreases as it moves from the seventh bend towards the eighth bend.

6. The electromagnetic relay according to claim 5, characterized in that, The first curved portion is opposite to the fifth curved portion, and the second curved portion is opposite to the sixth curved portion. The distance between the second bend and the sixth bend is greater than the distance between the first bend and the fifth bend. The third bend is opposite to the seventh bend, and the fourth bend is opposite to the eighth bend. The distance between the fourth bend and the eighth bend is greater than the distance between the third bend and the seventh bend.

7. The electromagnetic relay according to claim 5 or 6, characterized in that, The inner wall surface of the container has at least one protruding curved portion, which protrudes in an arc shape and extends in the vertical direction. At least one of the protruding curved portions is opposite to at least one of the second, fourth, sixth, and eighth curved portions of the retainer.

Images