Electromagnetic relay

Abstract

To provide an electromagnetic relay having improved reliability regarding circuit switching.SOLUTION: An electromagnetic relay includes a base unit 1, an electromagnetic unit 2, a magnetic unit 3, a first conductive terminal 4, a second conductive terminal 5, and a movable conductive terminal 6. The magnetic unit 3 has a magnetic member 31 having a fulcrum part 312, a pressure block 36, a magnetic part 35, an arc-shaped groove 33, and an arc-shaped protrusion 34. The arc-shaped groove 33 is formed on the magnetic part 35, the arc-shaped protrusion 34 is formed on the fulcrum part 312 and oscillatably connected to the arc-shaped groove 33. The magnetic part 35 can swing around the magnetic member 31 using the fulcrum part 312 as a fulcrum. The first conductive terminal 4 has a first contact part 42. The second conductive terminal 5 has a second contact part 52. The movable conductive terminal 6 has a movable conductive connector 61. When an electrical current is applied, the movable conductive connector 61 is pressed by the block 36 to bring the movable contact part 62 into contact with the second contact part 52. When the electrical current is not applied, the movable contact part 62 comes into contact with the first contact part 42.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to relays, and more particularly to electromagnetic relays. [Background technology]

[0002] The configuration of the conventional electromagnetic relay described in Patent Document 1 will be described with reference to Figures 1 and 2. Here, Figure 1 is a cross-sectional view showing a state in which electromagnet 102 of conventional electromagnetic relay 100 is in a conducting state, and Figure 2 is a cross-sectional view showing a state in which electromagnet 102 of conventional electromagnetic relay 100 is in a non-conducting state.

[0003] As shown in Figures 1 and 2, the conventional electromagnetic relay 100 described in Patent Document 1 comprises a base 101, an electromagnet 102 provided on the base 101, a magnetic plate 103 provided on the electromagnet 102, a driven plate 104 swingably connected to the upper end of the magnetic plate 103 and capable of being magnetically attracted by the magnetic attraction force of the electromagnet 102, a first contact portion 105 provided on the base 101 and above the electromagnet 102, a second contact portion 106 located above the first contact portion 105 and spaced apart from the first contact portion 105, and a conductive pin 107 provided above the driven plate 104 and capable of being moved in conjunction with the swing of the driven plate 104.

[0004] The conductive pin 107 includes a conductive contact 108 located between the first contact portion 105 and the second contact portion 106 .

[0005] When the electromagnet 102 is in a conducting state, as shown in FIG. 1, the driven plate 104 is magnetically attracted by the magnetic attraction force of the electromagnet 102, and moves downward so that the conductive contact 108 comes into contact with the first contact portion 105.

[0006] On the other hand, when the electromagnet 102 is in a non-energized state, the driven plate 104 is not magnetically attracted by the magnetic attraction force of the electromagnet 102, and the conductive contact 108 moves upward, as shown in Fig. 2. In this case, in addition to there being a gap 109 between the driven plate 104 and the magnetic plate 103, the conductive contact 108 comes into contact with the second contact portion 106.

[0007] With this configuration, the conventional electromagnetic relay 100 can be switched between a circuit (not shown) connected to the first contact portion 105 and a circuit (not shown) connected to the second contact portion 106. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Taiwan Utility Model Registration No. M611848U Summary of the Invention [Problem to be solved by the invention]

[0009] However, in the conventional electromagnetic relay described in Patent Document 1, the gap between the driven plate and the magnetic plate increases the magnetic resistance, so that the magnetic attraction force of the electromagnet is reduced by the magnetic resistance caused by the gap before driving the swinging of the driven plate relative to the magnetic plate.

[0010] Therefore, if the electromagnet is not energized stably or if the power supplied to the electromagnet is insufficient, the magnetic attraction force generated is weak to begin with, and the downward movement of the conductive contact may become unstable. If such a situation occurs, it will have a negative effect on the reliability of the conventional electromagnetic relay. Therefore, there is room for improvement in the design of the conventional electromagnetic relay.

[0011] SUMMARY OF THE PRESENT DISCLOSURE In view of the above problems, an object of the present invention is to provide an electromagnetic relay that can solve the above-mentioned drawbacks. [Means for solving the problem]

[0012] As a means for achieving the above object, the present invention provides a wireless communication device comprising: a base unit, an electromagnetic unit, a magnetic unit, a first conductive terminal, a second conductive terminal, and a movable conductive terminal, the electromagnetic unit is provided on the base unit and is capable of generating an electromagnetic force when energized; the magnetic unit is provided in the electromagnetic unit and includes a magnetic member, a driven means, an arc-shaped groove, and an arc-shaped protrusion; the magnetic member is a member on which the electromagnetic unit is disposed and has a fulcrum portion; The follower means includes a push block and a magnetic portion, The magnetic portion has a driven portion and an operating portion, the driven part is supported by the fulcrum of the magnetic member and can be magnetically attracted by the electromagnetic unit; The operating portion extends from one side of the driven portion in the lateral direction and is connected to the pushing block, the arc-shaped groove is formed in either the fulcrum portion or the driven portion, the arc-shaped convex portion is formed on both the fulcrum portion and the driven portion, and is connected to the arc-shaped groove portion so as to be capable of swinging, so that the magnetic portion can swing relative to the magnetic member with the fulcrum portion as a fulcrum; the first conductive terminal is provided on the base unit and has a first contact portion; the second conductive terminal is provided on the base unit and has a second contact portion facing and spaced apart from the first contact portion of the first conductive terminal; The movable conductive terminal has a movable conductive connector and a movable contact portion provided on the movable conductive connector, the movable conductive connector is provided on the base unit, a portion of the movable conductive connector is located between the first contact portion and the second contact portion, and when the electromagnetic unit is energized, the movable conductive connector can be pushed by the pushing block of the driven means; When the electromagnetic unit is in a conducting state, the magnetic portion is driven and moved so as to be magnetically attracted by the electromagnetic force generated by the electromagnetic unit, and the operating portion of the magnetic portion drives the pushing block to push the movable conductive connector and drives the movable contact portion to contact one of the first contact portion and the second contact portion, The present invention provides an electromagnetic relay, characterized in that when the electromagnetic unit is in a non-energized state, the magnetic portion is not magnetically attracted by the electromagnetic unit, and the movable contact portion is configured to come into contact with others at the first contact portion and the second contact portion. Effect of the Invention

[0013] According to the electromagnetic relay of the present invention, since no gap is formed between the magnetic part and the fulcrum part, magnetic resistance due to the gap as in the conventional case does not occur. Therefore, the movable contact part can move more smoothly between the first contact part and the second contact part. This makes it possible to dramatically improve the reliability of the circuit switching. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a side view showing a conventional electromagnetic relay in a conductive state. [Diagram 2] FIG. 1 is a side view showing a conventional electromagnetic relay in a non-energized state. [Diagram 3] 1 is a perspective view showing a configuration of an electromagnetic relay according to an embodiment of the present invention; [Figure 4] 4 is a cross-sectional view showing a state in which the movable contact portion of the movable conductive terminal according to the embodiment is in contact with the first contact portion of the first conductive terminal. FIG. [Diagram 5] 2 is a perspective view showing the positional relationship between the base, the electromagnetic unit, and the magnetic unit according to the embodiment. FIG. [Figure 6] 4 is a perspective view showing the arrangement relationship between the base, the first conductive terminal, the second conductive terminal, and the movable conductive terminal according to the embodiment. FIG. [Figure 7]7 is a cross-sectional view showing a cross-sectional configuration taken along line VII-VII in FIG. [Figure 8] 4 is a cross-sectional view showing a state in which the movable contact portion of the movable conductive terminal according to the embodiment is in close proximity to the second contact portion of the second conductive terminal. FIG. [Figure 9] 4 is a cross-sectional view showing a state in which the movable contact portion of the movable conductive terminal according to the embodiment is in contact with the second contact portion of the second conductive terminal. FIG. [Figure 10] FIG. 4 is a cross-sectional view showing the configuration of a comparative example of the electromagnetic relay of the embodiment. [Figure 11] 10 is a cross-sectional view illustrating a state in which a movable contact portion of a movable conductive terminal approaches a second contact portion of a second conductive terminal from a first contact portion of a first conductive terminal in a comparative example of the electromagnetic relay of the embodiment. FIG. [Figure 12] 13 is a cross-sectional view showing a state in which a movable contact portion of a movable conductive terminal is in contact with a second contact portion of a second conductive terminal in a comparative example of the electromagnetic relay of the embodiment. FIG. [Figure 13] 10 is a graph showing a change in torque due to the swinging of the magnetic part relative to the magnetic member in the electromagnetic relay of the embodiment and a comparative example of the electromagnetic relay of the embodiment. [Figure 14] FIG. 14 is a partially enlarged view of the graph shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an electromagnetic relay according to the present invention will be described with reference to the drawings.

[0016] The configuration of the electromagnetic relay according to the present invention will be described with reference to Fig. 3 to Fig. 9. Fig. 3 is a perspective view showing the configuration of the electromagnetic relay according to one embodiment of the present invention, Fig. 4 is a cross-sectional view showing a state in which the movable contact portion 62 of the movable conductive terminal 6 according to the embodiment is in contact with the first contact portion 42 of the first conductive terminal 4, Fig. 5 is a perspective view showing the positional relationship between the base 11, the electromagnetic unit 2, and the magnetic unit 3 according to the embodiment, Fig. 6 is a perspective view showing the positional relationship between the base 11, the first conductive terminal 4, the second conductive terminal 5, and the movable conductive terminal 6 according to the embodiment, and Fig. 7 is a cross-sectional view showing the configuration of the cross section taken along line VII-VII in Fig. 4.

[0017] Moreover, Figure 8 is a cross-sectional view showing a state in which the movable contact portion 62 of the movable conductive terminal 6 according to the embodiment is in close proximity to the second contact portion 52 of the second conductive terminal 5, and Figure 9 is a cross-sectional view showing a state in which the movable contact portion 62 of the movable conductive terminal 6 according to the embodiment is in contact with the second contact portion 52 of the second conductive terminal 5.

[0018] As shown in Figures 3 and 4, an electromagnetic relay of one embodiment of the present invention includes a base unit 1, an electromagnetic unit 2, a magnetic unit 3, a first conductive terminal 4, a second conductive terminal 5, and a movable conductive terminal 6.

[0019] As shown in FIG. 3, the base unit 1 includes a base 11 and a housing 12 that covers the base 11.

[0020] As shown in FIGS. 3 to 6, the base 11 has a bottom wall 111, two side walls 112, a conductive terminal seat 113, a push block seat 114, a positioning seat 115, and two engagement portions .

[0021] As shown in Figures 3, 5, and 6, the two side walls 112 extend upward from the bottom wall 111 along a first direction D1 and are each arranged at a distance from each other along a third direction D3 perpendicular to the first direction D1, and both are L-shaped when viewed from the first direction D1.

[0022] As shown in FIGS. 3 to 6, the bottom wall 111 extends in a second direction D2 that is perpendicular to both the first direction D1 and the third direction D3.

[0023] In this embodiment, in normal use, the first direction D1 is the up-down direction, the second direction D2 is the left-right direction, and the third direction D3 is the front-back direction, and the first direction D1, the second direction D2, and the third direction D3 are perpendicular to each other, but this is not limited to this, and in other embodiments, those directions may intersect each other.

[0024] As shown in FIGS. 3 to 6, the conductive terminal base 113 has a U-shape when viewed from the first direction D1, and both ends of the U-shape are connected to the two side walls 112, respectively.

[0025] As shown in FIGS. 4 to 6, the push block seat 114 is disposed between the two side walls 112 so as to be adjacent to the conductive terminal seat 113 in the second direction D2.

[0026] As shown in Figures 3, 5 and 6, the positioning seat 115 extends upward from one end of the conductive terminal seat 113 along the first direction D1 and is connected to one of the two side walls 112.

[0027] The two engagement portions 116 are intended to position two positioning portions 354 of the magnetic portion 35 described later, and as shown in Figures 3 and 5 to 7, are arranged on the two side walls 112, respectively, and are spaced apart from each other along the third direction D3.

[0028] 3 and 4, the base 11 and the housing 12 together define an accommodation space 13. The housing 12 has a partition plate 121 that extends downward in the first direction D1 and is disposed above the push block seat 114.

[0029] 4, the partition plate 121 divides the accommodating space 13 into a first space 131 and a second space 132 arranged along the second direction D2. Here, a part of the first space 131 is between the two side walls 112, while the second space 132 is above the conductive terminal base 113.

[0030] As shown in FIG. 4, a communication hole 133 that communicates with the first space 131 and the second space 132 is formed between the partition plate 121 and the push block seat 114.

[0031] As shown in Figs. 4 and 5, the electromagnetic unit 2 is provided on the base unit 1 and is capable of generating an electromagnetic force when energized.

[0032] In this embodiment, the electromagnetic unit 2 is an electromagnet, and has a first end 21 and a second end 22 arranged along a first direction D1, as shown in Figures 4 and 5. Here, the second end 22 is located below the first end 21 and connected to the bottom wall 111 of the base 11.

[0033] As shown in FIGS. 4, 5 and 7, the magnetic unit 3 is provided in the electromagnetic unit 2, and has a magnetic member 31, a driven means 32, an arc-shaped groove portion 33, and an arc-shaped protrusion portion .

[0034] 5, the magnetic member 31 has an L-shape when viewed from the third direction D3, and includes a connecting portion 311 fixedly connected to the bottom wall 111, and a fulcrum portion 312 extending upward (i.e., in the first direction D1) from one end of the connecting portion 311. The second end portion 22 of the electromagnetic unit 2 is disposed at the connecting portion 311 of the magnetic member 31.

[0035] The follower means 32 is disposed on the magnetic member 31 as shown in FIGS. 4 and 5, and includes a push block 36 and a magnetic portion 35.

[0036] The push block 36 is made of an electrically insulating material, and is provided on the push block seat 114, as shown in Figures 4 and 5. The push block 36 abuts against the push block seat 114, and extends through the communication hole 133, and can move in the left-right direction (i.e., the second direction D2).

[0037] As shown in FIG. 4, the push block 36 has a push block main body 361 extending along the second direction D2 and extending into the second space 132 through the communicating hole 133, and an extrusion protrusion 362 located within the second space 132 and protruding upward from the push block main body 361 in the first direction D1 so as to face the partition plate 121.

[0038] 4 and 5, the magnetic part 35 has an L-shape when viewed from the third direction D3, and is provided on the magnetic member 31 so as to be swingable relative to the magnetic member 31. The magnetic part 35 is connected to the push block 36 and can drive the push block 36 to move along the second direction D2.

[0039] As shown in FIGS. 4 and 5, the magnetic portion 35 has a follower portion 351, an operating portion 352, a bending portion 353, and two positioning portions 354 (see FIG. 5).

[0040] 4, the driven part 351 is in contact with and supported by the fulcrum part 312 of the magnetic member 31, and is configured to extend along the second direction D2. When the electromagnetic unit 2 is in an energized state, the driven part 351 is magnetically attracted by the first end part 21 of the electromagnetic unit 2, and can swing around the fulcrum part 312.

[0041] As shown in Figures 4 and 5, the operating part 352 extends from one side (i.e., the left side) in the lateral direction (i.e., the second direction D2) of the driven part 351 downward (i.e., the first direction D1) through the push block 36 and is connected to the push block 36.

[0042] As shown in FIGS. 4 and 5, the bent portion 353 is connected between the driven portion 351 and the operating portion 352, and is disposed so as to be spaced apart from the magnetic member 31 in the second direction D2.

[0043] 5, the two positioning portions 354 are disposed on both sides of the driven portion 351 in the third direction D3. More specifically, the two positioning portions 354 extend from both sides of the driven portion 351 in the third direction D3 (i.e., the front-rear direction) so as to be separated from each other, and both are close to the fulcrum portion 312 of the magnetic member 31.

[0044] 7, the magnetic part 35 can be positioned by sandwiching each positioning part 354 between the corresponding engaging part 116 and the magnetic member 31. Moreover, the two engaging parts 116 of the base unit 1 extend toward each other in the third direction D3 and press the two positioning parts 354.

[0045] The two engagement portions 116, which are bent toward each other from the two side walls 112 of the base 11, press and position the two positioning portions 354, so that the magnetic portion 35 does not come off the magnetic member 31 while the magnetic portion 35 is rotating. The arc-shaped groove portion 33 is formed in either the fulcrum portion 312 of the magnetic member 31 or the driven portion 351 of the magnetic portion 35. In this embodiment, the arc-shaped groove portion 33 is formed in the driven portion 351 so as to open toward the fulcrum portion 312, as shown in FIG.

[0046] The arc-shaped convex portion 34 is formed on both the fulcrum portion 312 and the driven portion 351. In this embodiment, as shown in Fig. 4, the arc-shaped convex portion 34 is formed on the fulcrum portion 312 of the magnetic member 31 and is connected to the arc-shaped groove portion 33 so as to be able to swing, and the magnetic portion 35 can swing relative to the magnetic member 31 with the fulcrum portion 312 as a fulcrum.

[0047] Here, the arc-shaped convex portion 34 is configured to have a complementary shape to the arc-shaped groove portion 33. With this configuration, when the magnetic portion 35 oscillates with respect to the magnetic member 31, no gap is generated between the magnetic portion 35 and the magnetic member 31.

[0048] In addition, in the state shown in FIG. 4, there is an included angle (θ) between the bottom surface of the driven portion 351 of the magnetic portion 35 and a horizontal plane perpendicular to the first direction D1.

[0049] It should be noted that in other embodiments, the locations of the arc-shaped groove 33 and the arc-shaped protrusion 34 may be interchanged. That is, contrary to this embodiment, the arc-shaped groove 33 may be formed in the fulcrum portion 312, while the arc-shaped protrusion 34 may be formed in the driven portion 351. Here, as long as the shapes of the arc-shaped groove 33 and the arc-shaped protrusion 34 are complementary to each other, they can exert the same function.

[0050] As shown in Figures 4 and 6, the first conductive terminal 4 and the second conductive terminal 5 are arranged at a distance from each other in the second direction D2, and both are provided on the conductive terminal base 113 of the base 11 of the base unit 1.

[0051] As shown in Figures 4 and 6, the first conductive terminal 4 is arranged closer to the electromagnetic unit 2 than the second conductive terminal 5, and has a first conductive portion 41 (see Figure 6) and a first contact portion 42.

[0052] The first conductive part 41 is an integrally formed metal plate, and as shown in FIG. 6, comprises a first body 411 arranged adjacent to the push block seat 114 within the second space 132, and a first pin 412 extending downward from the first body 411 and outward so as to pass through the bottom wall 111.

[0053] 6, the first contact portion 42 is fixedly connected to the first body 411 of the first conductive portion 41. Furthermore, the first conductive terminal 4 is connected to an external circuit (not shown) via a first pin 412.

[0054] As shown in Figures 4 and 6, the second conductive terminal 5 has a second conductive portion 51 (see Figure 6) and a second contact portion 52 that faces the first contact portion 42 of the first conductive terminal 4 and is spaced apart along the second direction D2.

[0055] The second conductive part 51 is an integrally formed metal plate, and as shown in FIG. 6, comprises a second body 511 located within the second space 132 and arranged at a distance from the first body 411 of the first conductive part 41 in the second direction D2, and a second pin 512 extending outward from the second body 511 so as to pass downward through the bottom wall 111.

[0056] 6, the second contact portion 52 is fixedly connected to the second body 511 of the second conductive portion 51. In addition, the second conductive terminal 5 is connected to another external circuit (not shown) via the second pin 512.

[0057] As shown in Figures 4 and 6, the movable conductive terminal 6 is provided in a second space 132 within the base unit 1, and includes a movable conductive connector 61 and a movable contact portion 62 provided on the movable conductive connector 61.

[0058] As shown in Figure 6, the movable conductive connector 61 is provided on the base unit 1, a portion of which is located between the first contact portion 42 and the second contact portion 52, and has a conductive plate 63 and a rocking piece 64.

[0059] 4 and 6, the conductive plate 63 is provided on the positioning seat 115 of the base unit 1. The rocking piece 64, on which the movable contact portion 62 is disposed, is connected to the conductive plate 63 and can move relative to the conductive plate 63, and can be pushed by the pushing block 36 of the driven means 32 when the electromagnetic unit 2 is in an energized state.

[0060] In addition, the conductive plate 63 is an integrally formed metal plate, and as shown in Figure 6, is L-shaped when viewed from the second direction D2, and has a fixed portion 631 located at the upper end of the positioning seat 115 of the base unit 1, and a movable pin 632 extending outward from the fixed portion 631 so as to pass downward through the bottom wall 111.

[0061] In this embodiment, the oscillating piece 64 is detachably connected to the conductive plate 63 by a fastener such as a bolt (not shown), but this is not limited to this, and in other embodiments, the oscillating piece 64 can also be formed integrally with the conductive plate 63.

[0062] 6, the second contact portion 52 is fixedly connected to the second body 511 of the second conductive portion 51. In addition, the movable conductive terminal 6 is connected to an external circuit via a movable pin 632.

[0063] The rocking piece 64 is an integrally formed metal sheet, and has a connecting portion 641, a rocking portion 642, and an elastic tab 643, as shown in FIG.

[0064] The connecting portion 641 is detachably connected to the fixed portion 631 of the conductive plate 63 and can move relative to the fixed portion 631. As shown in Fig. 6, the swinging portion 642 has the movable contact portion 62 disposed thereon and extends downward in the first direction D1, with a portion of the swinging portion 642 being located between the first contact portion 42 of the first conductive terminal 4 and the second contact portion 52 of the second conductive terminal 5 which are spaced apart from each other in the second direction D2.

[0065] 6, the elastic tab 643 is located between the fixed portion 631 and the movable contact portion 62 in the second direction D2, and extends from the swinging portion 642 toward the driven means 32 in the second direction D2 (i.e., to the right) and toward the movable contact portion 62 in the first direction D1 (i.e., downward). The elastic tab 643 is configured to store a restoring force when pushed by the push block 36. In this embodiment, the elastic tab 643 is provided between the connection portion 641 and the movable contact portion 62.

[0066] As shown in Figures 8 and 9, when the electromagnetic unit 2 is in an energized state, the driven portion 351 of the magnetic portion 35 is driven to be magnetically attracted by the electromagnetic force generated by the first end portion 21 of the electromagnetic unit 2, and moves and swings toward the electromagnetic unit 2 (i.e., downward) with the arc-shaped convex portion 34 as a fulcrum.

[0067] In this way, the operating portion 352 of the magnetic portion 35 can drive the push-out protrusion 362 of the push block 36 to push the elastic tab 643 of the movable conductive connector 61 to the left side in Figures 8 and 9, causing the swinging portion 642 to swing toward either the first contact portion 42 or the second contact portion 52 (in this embodiment, the second contact portion 52) until the movable contact portion 62 comes into contact with the second contact portion 52.

[0068] In this process, as shown in Fig. 8, when the movable contact portion 62 moves from the first contact portion 42 to the second contact portion 52 and is spaced from the second contact portion 52, the elastic tab 643 is continuously pushed by the pushing protrusion 362 of the pushing block 36, and moves to the left until the movable contact portion 62 contacts the second contact portion 52, as shown in Fig. 9. At this time, the oscillating portion 642 and the elastic tab 643 of the oscillating piece 64 in the movable conductive connector 61 are deformed and store a restoring force.

[0069] 4, when the electromagnetic unit 2 is in a non-energized state, the driven part 351 of the magnetic part 35 is not magnetically attracted by the electromagnetic unit 2, and the restoring force stored in the oscillating piece 64 is released to urge the movable contact part 62 to contact the other part (the first contact part 42 in this embodiment) of the first contact part 42 and the second contact part 52. As a result, the driven part 351 of the magnetic part 35 moves and oscillates away from the electromagnetic unit 2 (i.e., upward) with the arc-shaped protrusion 34 formed on the fulcrum part 312 as a fulcrum.

[0070] In this way, a function of switching on or off an external circuit (not shown) connected to the first contact portion 42 and the second contact portion 52, respectively, can be realized.

[0071] With this configuration, even if corrosion occurs between the movable contact portion 62 and the second contact portion 52 after a long period of use and the distance between the movable contact portion 62 and the second contact portion 52 increases along the second direction D2, a highly reliable electrical connection can be achieved between the movable contact portion 62 and the second contact portion 52 by the elastic tab 643 that drives the swing portion 642 to swing over a relatively large range when pushed by the push block 36. This makes it possible to extend the service life of the electromagnetic relay of this embodiment.

[0072] The configuration of a comparative example of the electromagnetic relay according to the embodiment will be described with reference to Fig. 10 to Fig. 12. Fig. 10 is a cross-sectional view showing the configuration of the comparative example of the electromagnetic relay according to the embodiment, Fig. 11 is a cross-sectional view showing a state in which the movable contact portion 62 of the movable conductive terminal 6 approaches from the first contact portion 42 of the first conductive terminal 4 to the second contact portion 52 of the second conductive terminal 5 in the comparative example of the electromagnetic relay according to the embodiment, and Fig. 12 is a cross-sectional view showing a state in which the movable contact portion 62 of the movable conductive terminal 6 contacts the second contact portion 52 of the second conductive terminal 5 in the comparative example of the electromagnetic relay according to the embodiment.

[0073] 10 to 12, a comparative example of the electromagnetic relay of the embodiment is provided for comparison with the electromagnetic relay of the embodiment described above. Here, since the configuration of the comparative example is similar to the configuration of the electromagnetic relay described above, only the differences from the electromagnetic relay described above will be described below.

[0074] Here, as shown in FIG. 10, the comparative example of the electromagnetic relay according to the embodiment does not have the arc-shaped groove portion 33 and the arc-shaped protrusion portion 34 as shown in FIG.

[0075] In the comparative example, as shown in Figures 11 and 12, the bending portion 353' of the magnetic part 35' is in direct contact with the fulcrum portion 312' of the magnetic member 31', and the magnetic part 35' can move and swing toward the electromagnetic unit 2' (i.e., downward) with the fulcrum portion 312' as a fulcrum.

[0076] In addition, in the state shown in FIG. 10, there is an included angle (θ′) between the bottom surface of the driven portion 351′ of the magnetic portion 35′ and the horizontal plane perpendicular to the first direction D1.

[0077] A comparison between the electromagnetic relay of this embodiment and the comparative example will be described with reference to Fig. 13 and Fig. 14. Fig. 13 is a graph showing the change in torque due to the swing of magnetic parts 35, 35' relative to magnetic members 31, 31' in the electromagnetic relay of this embodiment and the comparative example of the electromagnetic relay of this embodiment, and Fig. 14 is a partially enlarged view of the graph shown in Fig. 13.

[0078] The relationship between the included angle (θ, θ') and the torque caused by the magnetic parts 35, 35' swinging relative to the magnetic members 31, 31' in the electromagnetic relay of this embodiment and the comparative example is summarized in the following Table 1. The values ​​shown in Table 1 were obtained using simulation software such as Ansysworkbench.

[0079] [Table 1]

[0080] Here, measurement points A to G represent different positions (i.e., different angles θ) of the follower means 32 in the process in which the electromagnetic unit 2 in the electromagnetic relay of this embodiment is in an energized state and the follower part 351 moves toward the electromagnetic unit 2.

[0081] On the other hand, measurement points A' to G' represent different positions (i.e., different angles θ') of the magnetic part 35' in the process in which the electromagnetic unit 2' is in an energized state and the driven part 351' moves towards the electromagnetic unit 2' in the comparative example.

[0082] In this embodiment, the measurement point G corresponds to the state shown in Fig. 4, that is, the included angle (θ) as shown in Fig. 4 is 5.5°, in which the movable contact portion 62 of the movable conductive terminal 6 is in contact with the first contact portion 42 of the first conductive terminal 4. The measurement point A corresponds to the state shown in Fig. 9, in which the movable contact portion 62 is in contact with the second contact portion 52 of the second conductive terminal 5.

[0083] In the comparative example, the measurement point G' corresponds to the state shown in Fig. 10, that is, the included angle (θ') as shown in Fig. 10 is 5.5°, in this case, the movable contact portion 62' of the movable conductive terminal 6' is in contact with the first contact portion 42' of the first conductive terminal 4'. As shown in Fig. 10, in this case, there is a gap 37' between the bottom surface of the driven portion 351' of the magnetic portion 35' and the fulcrum portion 312' of the magnetic member 31'. The measurement point A' corresponds to the state shown in Fig. 12, that is, the included angle (θ') as shown in Fig. 10 is 0°, in this case, the movable contact portion 62' is in contact with the second contact portion 52'.

[0084] As shown in Figures 13 and 14, according to measurement points G and G', when the included angle (θ, θ') of the magnetic part 35 of the electromagnetic relay of the embodiment and the magnetic part 35' of the comparative example is 5.5°, the torque generated by the electromagnetic relay of the embodiment is greater than the torque generated by the comparative example.

[0085] In this way, the electromagnetic force generated by the electromagnetic unit 2' of the comparative example is first reduced by the magnetic resistance due to the gap 37' (see FIG. 10), and then drives the swing of the follower part 351' about the fulcrum part 312'.

[0086] In contrast, in the electromagnetic relay of this embodiment, the driven portion 351 of the magnetic portion 35 oscillates around the fulcrum portion 312, and the arc-shaped groove portion 33 and the arc-shaped convex portion 34 are configured in complementary shapes between the driven portion 351 and the fulcrum portion 312, so that no gap is formed between the magnetic portion 35 and the fulcrum portion 312.

[0087] Compared to the comparative example, the magnetic resistance of the electromagnetic relay of this embodiment is smaller than that of the comparative example, so the torque caused by the magnetic part 35 of the electromagnetic relay of this embodiment swinging relative to the magnetic member 31 is greater than the torque caused by the magnetic part 35' of the comparative example swinging relative to the magnetic member 31'.

[0088] Therefore, when the electromagnetic unit 2 is in a conducting state, the magnetic resistance of the electromagnetic relay of this embodiment is relatively small, and the torque generated by the magnetic part 35 of the electromagnetic relay of this embodiment is relatively large. In this manner, the pressing force applied by the magnetic part 35 to the pressing block 36 for the pressing block 36 to press the elastic tab 643 of the movable conductive connector 61 is relatively large. This ensures that the movable contact part 62 can move smoothly from the position where it contacts the first contact part 42 to the position where it contacts the second contact part 52.

[0089] In contrast, the magnetic resistance of the comparative example is relatively large, so the torque of the magnetic part 35' of the comparative example is reduced by the magnetic resistance. As a result, the pressing force applied by the magnetic part 35' to the pressing block 36' for the pressing block 36' to press the movable conductive connector 61' may be insufficient. This has an adverse effect in that the movable contact part 62' cannot move smoothly from the first contact part 42' to the second contact part 52'.

[0090] Therefore, the electromagnetic relay of this embodiment has a significantly higher reliability in switching circuits than the conventional relay and the comparative example described above.

[0091] Further comparing with the comparative example, the electromagnetic relay of this embodiment can realize the movement of the movable contact portion 62 from the first contact portion 42 to contact the second contact portion 52 with a relatively small electromagnetic force. In this manner, the electromagnetic relay of this embodiment can employ an electromagnetic unit 2 with a relatively small size, and therefore the size of the electromagnetic relay can be reduced.

[0092] In summary, according to the electromagnetic relay of the present invention, the arc-shaped groove 33 is formed on either the fulcrum 312 or the driven part 351 (the driving part 351 in this embodiment), and the arc-shaped protrusion 34 is formed on the other of the fulcrum 312 and the driven part 351 (the fulcrum 312 in this embodiment) and is connected to the arc-shaped groove 33 so as to be swingable. Therefore, no gap is formed between the magnetic part 35 and the fulcrum 312, and no magnetic resistance is generated due to the gap. In this way, the movable contact part 62 can be switched more smoothly between contact with the first contact part 42 or the second contact part 52. This allows the reliability of the circuit switching to be dramatically improved.

[0093] Although numerous specific details are set forth above to facilitate a thorough understanding of the present invention, it will be apparent to one of ordinary skill in the art that one or more other embodiments may be practiced without the specific details.

[0094] Although the preferred embodiments and modified examples of the present invention have been described above, the present invention is not limited to these, and is intended to encompass all modifications and equivalent configurations as various configurations falling within the spirit and scope of the broadest interpretation. [Industrial Applicability]

[0095] According to the electromagnetic relay of the present invention, a gap is not formed as in the conventional case, and therefore no magnetic resistance occurs due to the gap, so that the reliability of the circuit switching can be dramatically improved, and therefore the relay has industrial applicability. [Explanation of symbols]

[0096] 100 electromagnetic relay 101 Base 102 Electromagnet 103 magnetic plate 104 driven plate 105 1st contact part 106 2nd contact part 107 Conductive Pin 108 Conductive Contact 109 Gap 1 base unit 1' Base Unit 11 Base 111 Bottom wall 112 side wall 113 Conductive terminal seat 114 Push Block Seat 115 Positioning seat 116 Engagement part 12 Housing 121 Partition 13 Containment Space 131 1st space 132 2nd space 133 communication hole 2 Electromagnetic Unit 2' Electromagnetic Unit 21 First end 22 second end 3 Magnetic Unit 3′ Magnetic unit 31 Magnetic components 31' Magnetic member 311 connection part 312 Support 312' Support 32 driven means 33 Arc-shaped groove 34 Arc-shaped convex part 35 magnetic part 35′ magnetic part 351 driven part 351′ driven part 352 operation section 353 Bend 353′ Bend 354 Positioning part 36 Push Block 36' Push Block 361 Push Block Body 362 Extrusion protrusion 37' Gap 4 First conductive terminal 4' First conductive terminal 41 First conductive part 411 First Body 412 1st pin 42 1st contact part 42′ 1st ​​contact part 5 Second conductive terminal 5' Second conductive terminal 51 Second conductive part 511 2nd Body 512 2nd pin 52 2nd contact part 52′ 2nd contact part 6 movable conductive terminals 6′ movable conductive terminal 61 Movable Conductive Connector 61' Movable Conductive Connector 62 Movable contact part 62′ movable contact part 63 Conductive plate 631 fixed part 632 movable pin 64 Swing Piece 641 connection part 642 Swinging Part 643 Elastic Tab 643′ Elastic tab D1 1st direction D2 2nd direction D3 Third direction θ included angle θ′ included angle

Claims

1. The device includes a base unit, an electromagnetic unit, a magnetic unit, a first conductive terminal, a second conductive terminal, and a movable conductive terminal, the electromagnetic unit is provided on the base unit and is capable of generating an electromagnetic force when energized; the magnetic unit is provided in the electromagnetic unit and includes a magnetic member, a driven means, an arc-shaped groove, and an arc-shaped protrusion; the magnetic member is a member on which the electromagnetic unit is disposed and has a fulcrum portion; The follower means includes a push block and a magnetic portion, The magnetic portion has a driven portion and an operating portion, the driven part is supported by the fulcrum of the magnetic member and can be magnetically attracted by the electromagnetic unit; The operating portion extends from one side of the driven portion in the lateral direction and is connected to the pushing block, the arc-shaped groove is formed in either the fulcrum portion or the driven portion, the arc-shaped convex portion is formed on both the fulcrum portion and the driven portion, and is connected to the arc-shaped groove portion so as to be capable of swinging, so that the magnetic portion can swing relative to the magnetic member with the fulcrum portion as a fulcrum; the first conductive terminal is provided on the base unit and has a first contact portion; the second conductive terminal is provided on the base unit and has a second contact portion facing and spaced apart from the first contact portion of the first conductive terminal; The movable conductive terminal has a movable conductive connector and a movable contact portion provided on the movable conductive connector, the movable conductive connector is provided on the base unit, a portion of the movable conductive connector is located between the first contact portion and the second contact portion, and when the electromagnetic unit is energized, the movable conductive connector can be pushed by the push block of the driven means; When the electromagnetic unit is in a conducting state, the magnetic portion is driven and moved so as to be magnetically attracted by the electromagnetic force generated by the electromagnetic unit, whereby the operating portion of the magnetic portion drives the pushing block to push the movable conductive connector and drives the movable contact portion to contact one of the first contact portion and the second contact portion; When the electromagnetic unit is in a non-energized state, the magnetic portion is not magnetically attracted by the electromagnetic unit, and the movable contact portion is configured to contact the other portions at the first contact portion and the second contact portion. Electromagnetic relay characterized by:

2. The fulcrum portion of the magnetic member extends along a first direction, the driven portion of the magnetic portion extends along a second direction intersecting the first direction, The operating portion extends from one side of the driven portion toward the push block along the first direction, The magnetic portion further includes a bending portion, the bending portion is connected between the driven portion and the operating portion, and is disposed so as to be spaced apart from the magnetic member in the second direction.

2. The electromagnetic relay according to claim 1 .

3. The fulcrum portion of the magnetic member extends along a first direction, The driven portion of the magnetic portion extends along a second direction perpendicular to the first direction, The operating portion extends from one side of the driven portion toward the push block along the first direction, The magnetic portion further includes two positioning portions, the two positioning portions are disposed on both sides of the driven portion in a third direction perpendicular to both the first direction and the second direction, The base unit has two engagement portions, The two engagement portions are disposed so as to position the two positioning portions at an interval along the third direction, 2. The electromagnetic relay according to claim 1 .

4. the two positioning portions of the magnetic portion extend from both sides of the driven portion in the third direction so as to be separated from each other, The two engagement portions of the base unit extend toward each other in the third direction and press the two positioning portions.

4. The electromagnetic relay according to claim 3.

5. The movable conductive connector has a conductive plate and a rocking piece, the conductive plate is provided on the base unit, The rocking piece is disposed on the movable contact portion, connected to the conductive plate and movable relative to the conductive plate, and can be pushed by the pushing block when the electromagnetic unit is in an energized state.

2. The electromagnetic relay according to claim 1 .

6. The movable conductive connector has a fixed portion, a swinging portion, and an elastic tab; the fixed portion is located on the base unit, the pivoting portion is disposed on the movable contact portion, extends along a first direction, and is located between the first conductive terminal and the second conductive terminal spaced apart from each other in a second direction, a portion of which intersects with the first direction; the elastic tab is between the fixed portion and the movable contact portion in the second direction, and extends from the swing portion toward the driven means in the second direction and toward the movable contact portion in the first direction, and is configured to store a restoring force when pressed by the push block; The restoring force urges the movable contact portion to contact the other of the first contact portion and the second contact portion when the electromagnetic unit is in a non-energized state.

2. The electromagnetic relay according to claim 1 .

Images