Contact device

Abstract

The contact device includes a fixed contact, a movable contact, a housing, and an arc extinguishing component. The movable contact moves between a closed position in contact with the fixed contact and an open position away from the fixed contact. The housing accommodates the fixed contact and the movable contact. The arc extinguishing component is arranged in the housing to release arc extinguishing gas. When the movable contact is in the open position, the arc extinguishing component is arranged opposite to the gap between the fixed contact and the movable contact. The arc extinguishing component includes a shape with a front end tapered toward the gap.

Description

Technical Field

[0001] The invention relates to a contact device. Background Art

[0002] The contact device has a fixed contact and a movable contact. The movable contact moves between a closed position in contact with the fixed contact and an open position away from the fixed contact. When the movable contact leaves the fixed contact, an arc is generated between the contacts. In the past, for example, as in the contact device of Patent Document 1, an arc extinguishing component was arranged in the storage space of the contact in order to quickly extinguish the arc. The arc extinguishing component releases arc extinguishing gas by the heat of the arc. The arc is extinguished by the arc extinguishing gas. As a result, the interruption performance of the contact device can be improved.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2015-49939 Summary of the invention

[0004] In order to improve the arc extinguishing performance brought by the arc extinguishing gas, it is preferred that the arc extinguishing member is arranged close to the gap between the fixed contact and the movable contact. However, if the arc extinguishing member is arranged close to the gap between the contacts, and the space between the arc extinguishing member and the contacts becomes narrow, it is difficult for the arc to pass through the space, and it is retained. Therefore, it is difficult to quickly extinguish the arc.

[0005] An object of the present invention is to improve the arc extinguishing performance of arc extinguishing gas.

[0006] A contact device according to one embodiment includes a fixed contact, a movable contact, a housing, and an arc-extinguishing component. The movable contact moves between a closed position in contact with the fixed contact and an open position away from the fixed contact. The housing accommodates the fixed contact and the movable contact. The arc-extinguishing component is arranged in the housing to release arc-extinguishing gas. When the movable contact is in the open position, the arc-extinguishing component is arranged opposite to the gap between the fixed contact and the movable contact. The arc-extinguishing component includes a shape with a front end tapered toward the gap.

[0007] In the contact device of this embodiment, the arc extinguishing component includes a shape with a front end tapered toward the gap of the contact. Therefore, even if the arc extinguishing component is arranged close to the gap, a large space between the contact and the arc extinguishing component can be ensured. As a result, arc extinguishing gas can be generated near the gap of the contact, and the arc can easily pass through the space between the contact and the arc extinguishing component. As a result, the arc is easily stretched, so that the arc can be extinguished quickly. Furthermore, the arc is divided by the arc extinguishing component and stretched along the arc extinguishing component, thereby further extinguishing the arc quickly. As a result, the arc extinguishing performance of the arc extinguishing gas can be improved.

[0008] The arc extinguishing component may also include a front end portion, a base end portion, and a tapered portion. The front end portion may also be arranged opposite to the gap. The base end portion may also have a larger shape than the front end portion. The tapered portion may also be arranged between the front end portion and the base end portion, and has a shape with a front end tapered from the base end portion toward the front end portion. In this case, the front end portion has a smaller shape than the base end portion. Therefore, compared with the case where the front end portion has a shape of the same size as the base end portion, a larger space can be ensured between the contact and the front end portion.

[0009] The direction from the movable contact toward the fixed contact may be defined as the upper direction, and the opposite direction may be defined as the lower direction, and the upper end of the base end may be located above the lower end of the fixed contact. In this case, the arc contacts the arc extinguishing component in advance, so arc extinguishing gas can be generated quickly. Thus, the arc extinguishing performance can be improved. The upper end of the front end may also be located below the upper end of the base end. In this case, a larger space can be ensured between the fixed contact and the front end.

[0010] The lower end of the base end portion may also be located below the upper end of the movable contact. In this case, the arc contacts the arc extinguishing component in advance, so arc extinguishing gas can be generated quickly. As a result, arc extinguishing performance can be improved. The lower end of the front end portion may also be located above the lower end of the base end portion. In this case, a larger space can be ensured between the movable contact and the front end portion.

[0011] The fixed contact may also include a contact surface and a corner portion. The contact surface contacts the movable contact when the movable contact is in the closed position. The corner portion is located above the contact surface and connected to the contact surface. The corner portion may be rounded or chamfered. The upper end of the front end portion may also be located below the upper end of the corner portion. In this case, a larger space can be ensured between the fixed contact and the front end portion.

[0012] The front end portion may be located between the upper end of the corner portion and the upper end of the movable contact in the vertical direction. In this case, a large space can be ensured between the fixed contact and the front end portion.

[0013] In the direction from the arc extinguishing component toward the gap, the distance between the front end of the arc extinguishing component and the fixed contact may also be smaller than the distance from the housing to the front end of the arc extinguishing component. In this case, the front end of the arc extinguishing component and the fixed contact can be arranged close to each other. Thus, the arc extinguishing performance can be improved.

[0014] In the direction from the arc extinguishing component toward the gap, the distance between the front end of the arc extinguishing component and the movable contact can also be smaller than the distance from the housing to the front end of the arc extinguishing component. In this case, the front end of the arc extinguishing component and the movable contact can be arranged close to each other. Thereby, the arc extinguishing performance can be improved.

[0015] Effects of the Invention

[0016] According to the present invention, the arc extinguishing performance of the arc extinguishing gas can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a side cross-sectional view of the relay in the OFF state according to the embodiment.

[0018] Figure 2 It is a side cross-sectional view of the relay in the closed state.

[0019] Figure 3 It is an enlarged view showing the first fixed contact, the first movable contact, and the first arc-extinguishing component.

[0020] Figure 4 It is a three-dimensional diagram of the first arc extinguishing component.

[0021] Figure 5 This is a diagram showing the first fixed contact, the first movable contact, and the first arc-extinguishing member as viewed from the first arc-extinguishing member in a direction opposite to the first gap.

[0022] Figure 6 It is a side cross-sectional view of a relay according to another embodiment.

[0023] Figure 7 It is a diagram showing a modified example of the arc extinguishing component.

[0024] Figure 8 It is a diagram showing a modified example of the arc extinguishing component.

[0025] Fig. 9 It is a plan view showing a contact device according to a first modified example of the embodiment.

[0026] Fig.10 It is a plan view showing a contact device according to a second modified example of the embodiment.

[0027] Fig.11 yes Fig.10 XI-XI section view in FIG.

[0028] Explanation of symbols

[0029] 3: Shell;

[0030] 14: Fixed contact;

[0031] 16: Movable contact;

[0032] 51: arc extinguishing components;

[0033] 61: front end;

[0034] 62: base end;

[0035] 63: tapered part;

[0036] 141: contact surface;

[0037] 142: Corner;

[0038] G1: Gap. DETAILED DESCRIPTION

[0039] Hereinafter, a relay 1 a according to an embodiment will be described with reference to the drawings. Figure 1 1 is a side cross-sectional view showing a relay 1a according to an embodiment. Figure 1 As shown in FIG. 1 , the relay 1a includes a contact device 2, a housing 3, and a drive device 4. In the following description, the directions of up, down, left, and right refer to Figure 1 In detail, the direction from the drive device 4 toward the contact device 2 is defined as the upper direction. In addition, the direction from the contact device 2 toward the drive device 4 is defined as the lower direction. Figure 1 In the , the direction intersecting the up-down direction is defined as the left-right direction. In addition, the direction intersecting the up-down direction and the left-right direction is defined as the front-back direction. Figure 1 However, these directions are defined for convenience of explanation and do not limit the arrangement directions of the relay 1a.

[0040] The contact device 2 includes a movable mechanism 10, a first fixed terminal 11, a second fixed terminal 12, a movable contact piece 13, a first movable contact 16, and a second movable contact 17. The first fixed terminal 11 and the second fixed terminal 12 are formed of a conductive material such as copper. A first fixed contact 14 is provided at the first fixed terminal 11. A second fixed contact 15 is provided at the second fixed terminal 12. The first fixed contact 14 and the second fixed contact 15 are arranged separately in the left-right direction.

[0041] The first fixed terminal 11 includes a first contact support portion 21 and a first external terminal portion 22. The first fixed contact 14 is connected to the first contact support portion 21. The first external terminal portion 22 is connected to the first contact support portion 21. The first external terminal portion 22 protrudes outward from the housing 3. The second fixed terminal 12 includes a second contact support portion 23 and a second external terminal portion 24. The second fixed contact 15 is connected to the second contact support portion 23. The second external terminal portion 24 is connected to the second contact support portion 23. The second external terminal portion 24 protrudes outward from the housing 3.

[0042] In addition, Figure 1 In the embodiment, the first external terminal portion 22 and the second external terminal portion 24 protrude upward from the housing 3. However, the first external terminal portion 22 and the second external terminal portion 24 are not limited to the up-down direction, and may protrude from the housing 3 in other directions such as the left-right direction or the front-back direction.

[0043] The movable contact piece 13 is formed of a conductive material such as copper. The movable contact piece 13 extends in the left-right direction. In this embodiment, the length direction of the movable contact piece 13 coincides with the left-right direction. The movable contact piece 13 is disposed opposite to the first fixed terminal 11 and the second fixed terminal 12 in the up-down direction.

[0044] The movable contact piece 13 is configured to be movable in a contact direction Z1 and a separation direction Z2. The contact direction Z1 is a direction in which the movable contact piece 13 approaches the first fixed terminal 11 and the second fixed terminal 12 ( Figure 1 The separation direction Z2 is the direction in which the movable contact piece 13 moves away from the first fixed terminal 11 and the second fixed terminal 12 ( Figure 1 ).

[0045] The first movable contact 16 and the second movable contact 17 are supported by the movable contact piece 13. The first movable contact 16 and the second movable contact 17 are arranged to be separated in the left-right direction. The first movable contact 16 is opposed to the first fixed contact 14 in the vertical direction. The second movable contact 17 is opposed to the second fixed contact 15 in the vertical direction.

[0046] The movable mechanism 10 is configured so as to be movable in the contact direction Z1 and the separation direction Z2 together with the movable contact piece 13. The movable mechanism 10 includes a drive shaft 19, a bracket 26, and a contact spring 27. The drive shaft 19 extends in the up-down direction. The drive shaft 19 is connected to the movable contact piece 13. The drive shaft 19 extends downward from the movable contact piece 13. The drive shaft 19 is connected to the movable contact piece 13 via the bracket 26 and the contact spring 27. The bracket 26 is mounted on the movable contact piece 13 to hold the movable contact piece 13. The contact spring 27 is configured between the bracket 26 and the movable contact piece 13. When the movable contacts 16 and 17 are in contact with the fixed contacts 14 and 15, the contact spring 27 applies force to the movable contact piece 13 in the contact direction Z1.

[0047] The housing 3 accommodates the contact device 2 and the drive device 4. The housing 3 includes a first housing 3a and a second housing 3b. The first housing 3a includes a first storage portion S1. The second housing 3b includes a second storage portion S2. The first storage portion S1 and the second storage portion S2 are divided by a partition wall 46. The fixed contacts 14 and 15, the movable contact piece 13, and the movable contacts 16 and 17 are arranged in the first storage portion S1. The drive device 4 is arranged in the second storage portion S2.

[0048] The first housing 3a includes a top surface 41, a first side surface 42, and a second side surface 43. The top surface 41 is opposite to the movable contact piece 13 in the moving direction of the movable mechanism 10. The top surface 41 is arranged above the movable contact piece 13. The first side surface 42 and the second side surface 43 are arranged at intervals from each other in the left-right direction. The first side surface 42 and the second side surface 43 are opposite to the movable contact piece 13 in the direction intersecting the moving direction of the movable mechanism 10. That is, the first side surface 42 and the second side surface 43 are opposite to the movable contact piece 13 in the left-right direction. The first side surface 42 and the second side surface 43 extend in the moving direction of the movable mechanism 10. The movable contact piece 13 is arranged between the first side surface 42 and the second side surface 43 in the left-right direction.

[0049] The driving device 4 moves the movable contact piece 13 by electromagnetic force. The driving device 4 moves the movable contact piece 13 in the contact direction Z1 and the separation direction Z2. The driving device 4 is arranged below the housing 3. The driving device 4 includes a winding frame 30, a movable iron core 31, a coil 32, a fixed iron core 33, a yoke 34 and a return spring 35.

[0050] The bobbin 30 includes a hole 301 that passes through the bobbin 30 in the up-down direction. The movable iron core 31 is arranged in the hole 301 of the bobbin 30. The movable iron core 31 is separate from the fixed iron core 33. The movable iron core 31 is connected to the drive shaft 19. The movable iron core 31 is configured to be movable in the contact direction Z1 and the separation direction Z2. The coil 32 is wound on the bobbin 30. The coil 32 generates an electromagnetic force that moves the movable iron core 31 in the contact direction Z1 by energizing.

[0051] The fixed iron core 33 is disposed in the hole 301 of the bobbin 30. The fixed iron core 33 is disposed opposite to the movable iron core 31. The return spring 35 is disposed between the movable iron core 31 and the fixed iron core 33. The return spring 35 urges the movable iron core 31 in the separation direction Z2.

[0052] The yoke 34 is arranged so as to surround the coil 32. The yoke 34 is arranged on the magnetic path formed by the coil 32. The yoke 34 is arranged above the coil 32, on the side of the coil 32, and below the coil 32.

[0053] Next, the operation of the relay 1a is described. When the coil 32 is not energized, the drive device 4 is not excited. In this case, the drive shaft 19 and the movable iron core 31 are pressed in the separation direction Z2 by the elastic force of the return spring 35. Therefore, the movable contact piece 13 is also pressed in the separation direction Z2, and the movable contacts 16 and 17 are located at Figure 1 When the movable contacts 16 and 17 are in the disconnected position, the first movable contact 16 and the second movable contact 17 are separated from the first fixed contact 14 and the second fixed contact 15 .

[0054] When the coil 32 is energized, the drive device 4 is excited. In this case, the electromagnetic force of the coil 32 causes the movable iron core 31 to overcome the elastic force of the return spring 35 and move in the contact direction Z1. As a result, the drive shaft 19 and the movable contact piece 13 move in the contact direction Z1 together, and the movable contacts 16 and 17 move in the contact direction Z1. Figure 2 When the movable contacts 16 and 17 are in the closed position, the first movable contact 16 and the second movable contact 17 are in contact with the first fixed contact 14 and the second fixed contact 15, respectively.

[0055] When the current to the coil 32 stops and the coil 32 is demagnetized, the movable iron core 31 is pressed in the separation direction Z2 by the elastic force of the return spring 35. As a result, the drive shaft 19 and the movable contact piece 13 move in the separation direction Z2 together, and the movable contacts 16 and 17 return to the original position. Figure 1 Disconnected position shown.

[0056] like Figure 1 As shown, the contact device 2 includes a first arc-extinguishing component 51 and a second arc-extinguishing component 52. The first arc-extinguishing component 51 and the second arc-extinguishing component 52 are arranged in the first storage portion S1. The first and second arc-extinguishing components 51 and 52 are formed of a material that releases arc-extinguishing gas by the heat of the arc. The arc-extinguishing gas is, for example, hydrogen or a gas with nitrogen as the main component, which can extinguish the arc. Alternatively, the arc-extinguishing gas is not limited to a gas with hydrogen or nitrogen as the main component, and can also be a gas with other elements as the main component.

[0057] The first and second arc-extinguishing components 51 and 52 may be formed of materials such as phenolic resin, hydrogen storage metal, or titanium hydride. Alternatively, the first and second arc-extinguishing components 51 and 52 may be formed of thermosetting resins such as unsaturated polyester resin and melamine resin. Alternatively, the first and second arc-extinguishing components 51 and 52 may be formed of thermoplastic resins such as polyolefin resin, polyamide resin, and polyacetal resin. Alternatively, the first and second arc-extinguishing components 51 and 52 may be formed of other materials.

[0058] The first arc-extinguishing component 51 is arranged opposite to the gap G1 (hereinafter referred to as the "first gap G1") between the first fixed contact 14 and the first movable contact 16 when the movable contacts 16 and 17 are in the disconnected position. The first arc-extinguishing component 51 includes a shape that tapers toward the first gap G1. The second arc-extinguishing component 52 is arranged opposite to the gap G2 (hereinafter referred to as the "second gap G2") between the second fixed contact 15 and the second movable contact 17 when the movable contacts 16 and 17 are in the disconnected position. The second arc-extinguishing component 52 includes a shape that tapers toward the second gap G2.

[0059] The first and second arc-extinguishing components 51 and 52 are connected to the first housing 3a. Specifically, the first arc-extinguishing component 51 is connected to the first side surface 42. The second arc-extinguishing component 52 is connected to the second side surface 43. The first arc-extinguishing component 51 protrudes from the first side surface 42 toward the first gap G1. The second arc-extinguishing component 52 protrudes from the second side surface 43 toward the second gap G2.

[0060] Figure 3 It is an enlarged view showing the first fixed contact 14 , the first movable contact 16 , and the first arc-extinguishing member 51 . Figure 4 is a three-dimensional diagram of the first arc-extinguishing component 51. Figure 3 and Figure 4 As shown, the first arc-extinguishing component 51 includes a trapezoidal shape. In detail, the first arc-extinguishing component 51 includes a front end portion 61, a base end portion 62, and a tapered portion 63. The front end portion 61 is opposite to the first gap G1. The front end portion 61 has a flat shape. However, the front end portion 61 may also be a curved shape. The tapered portion 63 is disposed between the front end portion 61 and the base end portion 62. The tapered portion 63 has a shape in which the front end becomes thinner from the base end portion 62 toward the front end portion 61.

[0061] The base end portion 62 has a larger outer shape than the front end portion 61. Specifically, when viewed from the first arc-extinguishing component 51 in a direction opposite to the first gap G1, the base end portion 62 has a larger area than the front end portion 61. In other words, when viewed from the first arc-extinguishing component 51 in a direction opposite to the first gap G1, the front end portion 61 has a smaller area than the base end portion 62. The size of the base end portion 62 in the up-down direction is larger than the size of the front end portion 61 in the up-down direction. In other words, the size of the front end portion 61 in the up-down direction is smaller than the size of the base end portion 62 in the up-down direction.

[0062] like Figure 3 As shown, the lower end of the base end portion 62 is located below the upper end of the first movable contact 16. The upper end of the base end portion 62 is located above the lower end of the first fixed contact 14. The lower end of the front end portion 61 is located above the lower end of the base end portion 62. The upper end of the front end portion 61 is located below the upper end of the base end portion 62.

[0063] The first fixed contact 14 includes a contact surface 141 and a corner portion 142. The contact surface 141 contacts the first movable contact 16 when the first movable contact 16 is in the closed position. The corner portion 142 is located above the contact surface 141 and connected to the contact surface 141. The corner portion 142 has a rounded shape. However, the corner portion 142 may also have a chamfered shape.

[0064] exist Figure 3 In FIG. 1 , the dotted line L1 indicates the position of the upper end of the corner portion 142. The dotted line L2 indicates the position of the upper end of the first movable contact 16. Figure 3As shown, at least a portion of the front end portion 61 is located between the upper end (L1) of the corner portion 142 and the upper end (L2) of the first movable contact 16. Preferably, the entire front end portion 61 is located between the upper end (L1) of the corner portion 142 and the upper end (L2) of the first movable contact 16. The upper end of the front end portion 61 is located below the upper end (L1) of the corner portion 142.

[0065] The first arc-extinguishing component 51 is arranged close to the first gap G1. Specifically, in the direction from the first arc-extinguishing component 51 toward the first gap G1, the distance D1 between the front end of the first arc-extinguishing component 51 and the first fixed contact 14 is smaller than the distance D2 from the first housing 3a (first side surface 42) to the front end of the first arc-extinguishing component 51. In the direction from the first arc-extinguishing component 51 toward the first gap G1, the distance D3 between the front end of the first arc-extinguishing component 51 and the first movable contact 16 is smaller than the distance D2 from the first housing 3a (first side surface 42) to the front end of the first arc-extinguishing component 51.

[0066] The tapered portion 63 includes a first tapered surface 64 and a second tapered surface 65. The first tapered surface 64 and the second tapered surface 65 are inclined so that the distance between the first tapered surface 64 and the second tapered surface 65 decreases toward the first gap G1. The first tapered surface 64 faces the corner 142 of the first fixed contact 14. The second tapered surface 65 faces the corner 161 of the first movable contact 16.

[0067] Figure 5 1 is a diagram showing the first fixed contact 14, the first movable contact 16, and the first arc-extinguishing member 51 as viewed from the left and right directions. Figure 5 1 is a diagram showing the first fixed contact 14, the first movable contact 16, and the first arc-extinguishing member 51 as viewed from the first arc-extinguishing member 51 in a direction opposite to the first gap G1. Figure 5 As shown, when viewed from the first arc extinguishing member 51 in the direction opposite to the first gap G1, the first tapered surface 64 overlaps with the corner 142 of the first fixed contact 14. When viewed from the first arc extinguishing member 51 in the direction opposite to the first gap G1, the second tapered surface 65 overlaps with the corner 161 of the first movable contact 16.

[0068] The second arc-extinguishing member 52 has the same structure as the first arc-extinguishing member 51 except that the second arc-extinguishing member 52 is provided substantially bilaterally symmetrically with the first arc-extinguishing member 51. Therefore, a detailed description of the second arc-extinguishing member 52 will be omitted.

[0069] In the contact device 2 of the present embodiment described above, the first arc-extinguishing member 51 includes a shape that tapers toward the first gap G1. Therefore, even if the first arc-extinguishing member 51 is arranged close to the first gap G1, a large space can be ensured between the first fixed contact 14 and the first arc-extinguishing member 51. In addition, a large space can be ensured between the first movable contact 16 and the first arc-extinguishing member 51. As a result, arc-extinguishing gas can be generated near the first gap G1, and the arc can easily pass through the space between the first fixed contact 14 and the first arc-extinguishing member 51 and the space between the first movable contact 16 and the first arc-extinguishing member 51. As a result, the arc is easily stretched, so that the arc can be extinguished quickly.

[0070] Furthermore, the arc is divided by the first arc-extinguishing component 51 and stretched along the first arc-extinguishing component 51, so that the arc can be extinguished more quickly. As a result, the arc-extinguishing performance of the arc-extinguishing gas can be improved. The second arc-extinguishing component 52 can also obtain the same effect as the first arc-extinguishing component 51 described above.

[0071] An embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment, and various changes can be made without departing from the scope of the invention. For example, the contact device is not limited to a relay, and can also be used in a circuit breaker or a switch.

[0072] In the above-mentioned embodiment, the drive device 4 pushes out the drive shaft 19 from the drive device 4 side, thereby the movable contact piece 13 moves in the contact direction Z1. In addition, the drive shaft 19 is pulled into the drive device 4 side by the drive device 4, and the movable contact piece 13 moves in the separation direction Z2. However, the movement direction of the drive shaft 19 for closing and opening the contacts may be opposite to that in the above-mentioned embodiment. That is, the drive device 4 may pull the drive shaft 19 into the drive device 4 side, thereby the movable contact piece 13 moves in the contact direction Z1. The drive shaft 19 may also be pushed out from the drive device 4 side by the drive device 4, and the movable contact piece 13 moves in the separation direction Z2. That is, the contact direction Z1 and the separation direction Z2 may also be opposite to those in the above-mentioned embodiment.

[0073] The relay 1a is a so-called plunger-type relay, but the present invention is not limited to the plunger-type relay and can also be applied to other types of relays. Figure 6 As shown, the present invention can also be applied to a hinged relay 1b. Figure 6 In the embodiment, the same reference numerals are used to denote structures corresponding to those in the above-described embodiment. Figure 6In the hinge-type relay 1b shown, when the coil 32 is excited, the armature 36 is attracted to the iron core 39 by the magnetic force of the coil 32 and swings. A latch 37 is connected to the armature 36. Due to the swing of the armature 36, the latch 37 presses the movable contact piece 13, thereby the movable contact piece 13 and the movable contact point 16 move in the contact direction Z1. As a result, the movable contact point 16 contacts the fixed contact point 14.

[0074] If the coil 32 is demagnetized, the armature 36 swings in the opposite direction due to the elastic force of the hinge spring 38. As a result, the card 37, the movable contact piece 13 and the movable contact 16 move in the separation direction Z2, and the movable contact 16 separates from the fixed contact 14. The arc extinguishing member 51 is arranged opposite to the gap G1 between the movable contact 16 and the fixed contact 14. The arc extinguishing member 51 includes a shape that tapers toward the gap G1. In such a hinge-type relay 1b, the same effect as the relay 1a of the above-mentioned embodiment can also be obtained.

[0075] The shapes or configurations of the first fixed terminal 11, the second fixed terminal 12, and the movable contact piece 13 may be changed. The shapes or configurations of the coil 32, the bobbin 30, or the yoke 34 may be changed. The shapes or configurations of the first fixed contact 14, the second fixed contact 15, the first movable contact 16, and the second movable contact 17 may be changed.

[0076] The first fixed contact 14 may be separate from the first fixed terminal 11, or may be integrated. The second fixed contact 15 may be separate from the second fixed terminal 12, or may be integrated. The first movable contact 16 may be separate from the movable contact piece 13, or may be integrated. The second movable contact 17 may be separate from the movable contact piece 13, or may be integrated.

[0077] The shape and / or configuration of the arc extinguishing component is not limited to the above-mentioned shape and / or configuration, and may also be changed. For example, the arc extinguishing component is not limited to the side surfaces 42 and 43 of the housing 3, and may also be connected to the top surface 41. Alternatively, the arc extinguishing component may also be connected to the partition wall 46. The positional relationship between the arc extinguishing component and the contact is not limited to the above-mentioned relationship of the distance D1-D3, and may also be changed.

[0078] like Figure 7 As shown in (A), the arc extinguishing component 51 may also include a pyramidal shape. Figure 7 As shown in (B), the arc extinguishing component 51 may also include a truncated pyramid shape. Figure 8 As shown in (A), the arc extinguishing component 51 may also include a conical shape. Figure 8 As shown in (B), the arc extinguishing component 51 may also include a truncated cone shape.

[0079] In the above embodiment, the first arc extinguishing component 51 is opposite to the first gap G1 in the left-right direction. The second arc extinguishing component 52 is opposite to the second gap G2 in the left-right direction. However, the direction in which the arc extinguishing component and the gap are opposite is not limited to the left-right direction, that is, not limited to the length direction of the movable contact piece 13. For example, Fig. 9 FIG. 2 is a top view showing a contact device 2 according to a first modified example. Fig. 9 As shown, the arc extinguishing members 51 and 52 may be disposed opposite to the gaps G1 and G2 in the front-rear direction. That is, the arc extinguishing members 51 and 52 may be disposed opposite to the gaps G1 and G2 in the short-side direction of the movable contact piece 13 .

[0080] In the above embodiment, the first arc extinguishing component 51 and the second arc extinguishing component 52 are provided. However, the number of arc extinguishing components is not limited to 2, and may be less than 2 or more than 2. For example, one of the first arc extinguishing component 51 and the second arc extinguishing component 52 may be omitted. Or, Fig.10 It is a plan view showing a contact device 2 according to a second modified example. Fig.11 yes Fig.10 The XI-XI section view in FIG. Fig.10 and Fig.11 As shown, two arc extinguishing members 51 and 53 may be disposed opposite to the first gap G1 with the first gap G1 interposed therebetween. Two arc extinguishing members 52 and 54 may be disposed opposite to the second gap G2 with the second gap G2 interposed therebetween.

[0081] Industrial Applicability

[0082] According to the present invention, the arc extinguishing performance of the arc extinguishing gas can be improved.

Claims

1. A contact device, characterized in that: have: Fixed contacts; a movable contact that moves between a closed position in contact with the fixed contact and an open position away from the fixed contact; a housing that accommodates the fixed contact and the movable contact; and, The arc extinguishing component is arranged in the housing and releases arc extinguishing gas. The arc extinguishing member is configured to be opposite to the gap between the fixed contact and the movable contact when the movable contact is in the disconnected position. The arc extinguishing member has a shape with a front end tapered toward the gap, The arc extinguishing component comprises: a front end portion opposite to the gap; a base end portion having a larger outer shape than the front end portion; a tapered portion provided between the front end portion and the base end portion and having a shape in which the front end becomes thinner from the base end portion toward the front end portion, The tapered portion includes a first tapered surface and a second tapered surface, The first conical surface is arranged toward the fixed contact in a direction in which the arc extinguishing component and the gap are opposite to each other. The second tapered surface is arranged toward the movable contact in a direction in which the arc extinguishing member and the gap are opposed to each other.

2. The contact device according to claim 1, characterized in that: The direction from the movable contact toward the fixed contact is defined as upward, and the opposite direction is defined as downward. An upper end of the base end portion is located above a lower end of the fixed contact.

3. The contact device according to claim 2, characterized in that: The upper end of the distal end portion is located below the upper end of the proximal end portion.

4. The contact device according to claim 2, characterized in that: The lower end of the base end portion is located below the upper end of the movable contact.

5. The contact device according to claim 4, characterized in that: The lower end of the front end portion is located above the lower end of the base end portion.

6. The contact device according to any one of claims 1 to 5, characterized in that: The direction from the movable contact toward the fixed contact is defined as upward, and the opposite direction is defined as downward. The fixed contact has: a contact surface that contacts the movable contact when the movable contact is in a closed position; and a rounded or chamfered corner located above and connected to the contact surface, The upper end of the front end portion is located below the upper end of the corner portion.

7. The contact device according to claim 6, characterized in that The front end portion is located between an upper end of the corner portion and an upper end of the movable contact in the up-down direction.

8. The contact device according to any one of claims 1 to 5, characterized in that: In a direction from the arc extinguishing member toward the gap, a distance between a front end of the arc extinguishing member and the fixed contact is smaller than a distance from the housing to the front end of the arc extinguishing member.

9. The contact device according to any one of claims 1 to 5, characterized in that: In a direction from the arc extinguishing member toward the gap, a distance between a front end of the arc extinguishing member and the movable contact is smaller than a distance from the housing to the front end of the arc extinguishing member.

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