Movable contact assembly and electromagnetic contactor including same

Abstract

The invention discloses a movable contact assembly and an electromagnetic contactor including the same. A movable contact assembly according to an aspect of the present invention comprises: a movable contact provided so as to be movable in a direction toward a fixed contact and a direction away from the fixed contact; a movable shaft coupled to the movable core so as to be movable together with the movable core and coupled to the movable contact; and a movable contact supporting member coupled to the movable shaft and formed to surround at least a portion of the movable contact, the movable contact being formed to have a length in one direction and a width in the other direction, the movable contact supporting member being capable of surrounding the movable contact in the other direction.

Description

TECHNICAL FIELD

[0001] The present application relates to a movable contact assembly and an electromagnetic contact including the same, and more particularly, to a movable contact assembly of a structure capable of improving contact reliability and assembly, and an electromagnetic contact including the same. BACKGROUND

[0002] An electromagnetic contact is a device that forms contact between contacts using magnetic attraction generated by applying current to an electromagnet. When the electromagnet forms magnetic attraction, the movable contact moves toward the fixed contact to contact each other.

[0003] The fixed contact of the electromagnetic contact is connected to an external power source and a load, respectively, in a manner capable of being energized. When the fixed contact contacts the movable contact, the external power source and the load can be connected to each other in a manner capable of being energized. When the current application to the electromagnet is released, the magnetic attraction formed by the electromagnet also disappears. Therefore, the movable contact is separated from the fixed contact, and the energized state between the external power source and the load can be released.

[0004] In addition, a plurality of fixed contacts can be provided. The plurality of fixed contacts can be connected to the external power source and the load, respectively, in a manner capable of being energized, while being spaced apart from each other. At this time, the movable contact extends in a direction in which the plurality of fixed contacts are spaced apart, and can simultaneously contact or separate from the plurality of fixed contacts. Therefore, the plurality of fixed contacts can be connected or blocked in a manner capable of being energized by the movable contact.

[0005] As the name implies, the movable contact is provided in a manner capable of moving. Therefore, compared to the fixed contact which is fixedly provided, the movable contact can be moved unexpectedly. In this case, the contact reliability of the movable contact and the fixed contact is reduced, and thus there is a risk that the operation reliability of the electromagnetic contact is also reduced.

[0006] Korean Patent No. 10-2086878 discloses an electromagnetic contact. Specifically, an electromagnetic contact is disclosed which includes a shaft-shaped movable support that supports a central portion of an extension direction of a movable contact member and a sliding guide that limits rotational displacement of the movable contact member, thereby preventing rotation of the movable contact member.

[0007] However, the sliding guide disclosed in the prior document is configured to include an opening for being penetrated by a shaft and a plurality of contact portions for supporting the movable contact member. That is, since the structure of the sliding guide is complex and the movable contact member needs to be supported in a planar direction, there is a concern that the support reliability is reduced.

[0008] Korean Patent No. 10-1090501 discloses a movable portion of an electronic switch. Specifically, a movable portion of an electronic switch is disclosed, which forms a movable contact hole on a shaft so that the movable portion of the electronic switch can move in the axial direction of the shaft in a state of being penetrated by the movable contact.

[0009] However, the movable portion of the electronic switch disclosed in the above-mentioned prior art needs to change the structure of the shaft itself. In addition, since the movable contact hole is formed on the shaft, there is a concern that the strength of the shaft is reduced.

[0010] Korean Patent No. 10-2086878 (March 09, 2020).

[0011] Korean Patent No. 10-1090501 (December 07, 2011). SUMMARY

[0012] PROBLEMS TO BE SOLVED BY THE INVENTION

[0013] The present invention has been made to solve the above problems, and it is an object of the present invention to provide a movable contact assembly of a structure with improved contact reliability and an electromagnetic contact including the same.

[0014] It is another object of the present invention to provide a movable contact assembly of a structure capable of preventing any shaking of a movable structure and an electromagnetic contact including the same.

[0015] It is still another object of the present invention to provide a movable contact assembly of a structure with improved assembly convenience and an electromagnetic contact including the same.

[0016] It is still another object of the present invention to provide a movable contact assembly of a structure capable of preventing a reduction in the strength of a movable structure and an electromagnetic contact including the same.

[0017] It is still another object of the present invention to provide a movable contact assembly of a structure capable of improving assembly convenience without excessive structural changes and an electromagnetic contact including the same.

[0018] The technical problems of the present invention are not limited to the above-mentioned technical problems, and other technical problems that can be clearly understood by those skilled in the art to which the present invention pertains from the following description can be included.

[0019] MEANS FOR SOLVING PROBLEMS

[0020] According to an aspect of the present application, there can be provided a movable contact assembly including a movable contact disposed to be movable in a direction toward a fixed contact and a direction away from the fixed contact; a movable shaft combined with a movable core in a manner movable together with the movable core, combined with the movable contact; and a movable contact support member combined with the movable shaft, formed to surround at least a portion of the movable contact, the movable contact formed to have a length in one direction and a width in another direction, the movable contact support member being able to surround the movable contact in the other direction.

[0021] At this time, there can be provided a movable contact assembly in which a plurality of the movable contact support members are provided, the plurality of the movable contact support members being spaced apart in the one direction and surrounding the movable contact at a plurality of positions.

[0022] In addition, there can be provided a movable contact assembly in which a pair of the movable contact support members are provided, the pair of the movable contact support members being disposed apart from each other in the one direction.

[0023] At this time, there can be provided a movable contact assembly in which a pair of the fixed contacts are provided and disposed apart from each other in the one direction, a pair of the movable contact support members being disposed between the pair of the fixed contacts in the one direction.

[0024] In addition, there can be provided a movable contact assembly in which the movable contact support member includes a first extension portion extending in a direction toward the fixed contact, surrounding one edge of the movable contact in a width direction; a second extension portion continuous with the first extension portion, extending in the other direction, surrounding one edge of the movable contact in a height direction; and a third extension portion continuous with the second extension portion, extending in a direction toward the fixed contact, surrounding another edge of the movable contact in the width direction.

[0025] At this time, there can be provided a movable contact assembly in which the movable contact support member is in contact with the movable contact.

[0026] In addition, there can be provided a movable contact assembly in which the movable contact includes a groove recessed in a shape corresponding to the movable contact support member at a position corresponding to the movable contact support member.

[0027] At this time, there can be provided a movable contact assembly in which the movable shaft includes a shaft bracket disposed opposite the fixed contact with the movable contact interposed therebetween, the movable contact support member being combined with the shaft bracket, surrounding at least a portion of a surface of the movable contact opposite the shaft bracket.

[0028] Further, a movable contact assembly can be provided, which includes a movable spring provided between the movable contact and the shaft holder to elastically support the movable contact.

[0029] Further, according to an aspect of the present application, an electromagnetic contactor can be provided, which includes a housing in which a space is formed, an opening and closing portion combined with the housing and connected to an external power source and an external load in a manner that electricity can be supplied, and a movable contact assembly configured to be movably accommodated in the housing and to supply electricity by contacting the opening and closing portion or to block the supply of electricity by being separated from the opening and closing portion, the opening and closing portion including a fixed contact provided on one side in a height direction of the housing, a portion of one side of the fixed contact exposed to the outside of the housing to be connected to the external power source and the external load in a manner that electricity can be supplied, and a movable core provided on the other side in the height direction of the housing and configured to be movable in a direction toward the fixed contact and a direction away from the fixed contact, the movable contact assembly including a movable shaft combined with the movable core in a manner that the movable shaft can be moved together with the movable core, a movable contact combined with the movable shaft to be moved together, and a movable contact support member combined with the movable shaft and formed to surround at least a portion of the movable contact to prevent any shaking of the movable contact.

[0030] At this time, an electromagnetic contactor can be provided, in which the movable contact extends in one direction, a plurality of the movable contact support members are provided, and the plurality of the movable contact support members are arranged apart from each other in the one direction.

[0031] Further, an electromagnetic contactor can be provided, in which a pair of the fixed contacts are provided, the pair of the fixed contacts are arranged apart from each other in the one direction, and the plurality of the movable contacts are provided between the pair of the fixed contacts in the one direction.

[0032] At this time, an electromagnetic contactor can be provided, in which the movable contact support member includes a first extension portion extending in a height direction of the movable contact to surround one side in a width direction of the movable contact, a second extension portion continuous with the first extension portion and extending in the width direction of the movable contact to surround one side in the height direction of the movable contact, and a third extension portion continuous with the second extension portion and extending in the height direction of the movable contact to surround the other side in the width direction of the movable contact.

[0033] Further, an electromagnetic contactor can be provided, in which one end of the first extension portion is continuous with the second extension portion at a predetermined angle, the other end of the first extension portion is combined with the movable shaft, one end of the third extension portion is continuous with the second extension portion at a predetermined angle, and the other end of the third extension portion is combined with the movable shaft.

[0034] Effects of Invention

[0035] According to the above structure, the movable contact assembly according to the embodiment of the present application and the electromagnetic contactor including the same can improve contact reliability.

[0036] In addition, according to the above structure, the movable contact assembly according to the embodiment of the present application and the electromagnetic contactor including the same can prevent any shaking of the movable structure.

[0037] In addition, according to the above structure, the movable contact assembly according to the embodiment of the present application and the electromagnetic contactor including the same can improve assembly convenience.

[0038] In addition, according to the above structure, the movable contact assembly according to the embodiment of the present application and the electromagnetic contactor including the same can prevent a decrease in strength of the movable structure.

[0039] In addition, according to the above structure, the movable contact assembly according to the embodiment of the present application and the electromagnetic contactor including the same can improve assembly convenience without excessive structural changes.

[0040] The effects of the present application are not limited to the above-mentioned effects, and it should be understood that all effects derivable from the detailed description of the present application or the appended claims are encompassed. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is a perspective view showing an electromagnetic contactor according to an embodiment of the present application.

[0042] Figure 2 is a sectional view taken along line A-A of the electromagnetic contactor of Figure 1

[0043] Figure 3 is a sectional view taken along line B-B of the electromagnetic contactor of Figure 1

[0044] Figures 4-5 is an exploded perspective view showing the structure of the electromagnetic contactor of Figure 1

[0045] Figures 6-7 is a perspective view showing a housing of the electromagnetic contactor of Figure 1

[0046] Figure 8 is a perspective view showing an opening and closing portion of the electromagnetic contactor of Figure 1

[0047] Figure 9 is a perspective view showing a movable contact assembly of the electromagnetic contactor of​​​​​Figure 1 An exploded perspective view of the opening and closing portion, core portion, and movable contact assembly of the electromagnetic contactor.

[0048] Figure 10 Is a perspective view showing the movable contact assembly of the electromagnetic contactor provided with Figure 1

[0049] Figure 11 Is a front view showing the movable contact assembly of the electromagnetic contactor. Figure 10

[0050] Figure 12 Is a C-C sectional view showing the movable contact assembly of the electromagnetic contactor. Figure 10

[0051] Figure 13 Is a perspective view showing the movable contact assembly of the electromagnetic contactor. Figure 10

[0052] Figure 14 Is a front view showing the movable contact assembly of the electromagnetic contactor. Figure 13

[0053] Figure 15 Is a front sectional view showing the movable contact assembly of the electromagnetic contactor. Figure 13

[0054] Figure 16 Is a side sectional view showing the movable contact assembly of the electromagnetic contactor. Figure 13

[0055] Figure 17 Is a perspective view showing the auxiliary contact housing of the movable contact assembly provided with Figure 13

[0056] Figure 18 Is a side view showing the auxiliary contact housing of the electromagnetic contactor. Figure 17

[0057] Figure 19 Is a front sectional view showing the internal structure of the electromagnetic contactor according to an embodiment of the present application in a state in which an external power source and a load are connected in a manner capable of being energized.

[0058] Figure 20 Is a side sectional view showing the internal structure of the electromagnetic contactor according to an embodiment of the present application in a state in which an external power source and a load are connected in a manner capable of being energized.

[0059] Figure 21 Is a front sectional view showing the internal structure of the electromagnetic contactor according to an embodiment of the present application in a state in which connection between an external power source and a load is blocked.

[0060] Figure 22 ​​​​​​​​​FIG. 2 is a side cross-sectional view showing an internal structure of an electromagnetic contactor according to an embodiment of the present application in a state in which connection between an external power source and a load is blocked. DETAILED DESCRIPTION

[0061] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings such that a person of ordinary skill in the art can easily practice the present application. The present application can be implemented in various different forms, and is not limited to the embodiments described herein. In order to clearly describe the present application, portions unrelated to the description have been omitted from the accompanying drawings, and throughout the specification, the same or similar constituent elements are given the same reference numerals.

[0062] The words and terms used in the present specification and the appended claims should not be interpreted as being limited to the commonly or dictionary meanings, but should be interpreted as having meanings and concepts that are consistent with the technical idea of the present application, in order to describe the own application in the best way.

[0063] Therefore, the structures shown in the embodiments described in the present specification and the accompanying drawings correspond to a preferred embodiment of the present application, and do not refer to all technical ideas of the present application, and thus various equivalents and modifications of the corresponding structures can be possible from the application viewpoint of the present application.

[0064] In the following description, the description of some constituent elements or is omitted in order to make the features of the present application clear.

[0065] The term "communication" used in the following description means that one or more members are connected to each other in a fluidly communicable manner. In an embodiment, communication can be formed by a member such as a conduit, a pipe, a duct, or the like. In the following description, communication can be used in the same meaning as "fluidly connected" to one or more members.

[0066] The term "power supply" used in the following description means that one or more members are connected to each other in a current or electric signal transmittable manner. In an embodiment, power supply can be formed in a wired form using a wire member or the like, or in a wireless form such as Bluetooth, Wi-Fi, RFID (Radio Frequency Identification), or the like. In an embodiment, power supply can include the meaning of "communication".

[0067] The term "fluid" used in the following description means any form of matter that flows by an external force and can change in shape or volume, or the like. In an embodiment, the fluid can be a liquid such as water or a gas such as air.

[0068] The terms "upper side", "lower side", "left side", "right side", "front side", and "rear side" used in the following description should be understood with reference to the coordinate system shown in the entire accompanying drawings.

[0069] Referring to Figures 1-9 An electromagnetic contactor 10 according to an embodiment of the present application is shown. The electromagnetic contactor 10 can be electrically connected to an external power source (not shown) and an external load (not shown), respectively. The electromagnetic contactor 10 can be configured to form or release an electrical connection between the external power source (not shown) and the external load (not shown). To this end, the electromagnetic contactor 10 includes a fixed contact 220 and a movable contact 410, which will be described later.

[0070] In addition, the electromagnetic contactor 10 according to an embodiment of the present application includes an upper magnetic yoke 450 and a lower magnetic yoke 460 for canceling electromagnetic repulsive force generated when the fixed contact 220 and the movable contact 410 are in contact. At this time, the upper magnetic yoke 450 can maintain a certain height regardless of the lifting of the structure (i.e., the movable shaft 430) disposed to be liftable.

[0071] Therefore, even if the movable shaft 430 is lifted, at least a portion of the upper magnetic yoke 450 and the lower magnetic yoke 460 are arranged to overlap each other, and a sufficient amount of magnetic attractive force can be formed therebetween. Therefore, the electromagnetic repulsive force generated when the fixed contact 220 and the movable contact 410 are in contact can be effectively canceled.

[0072] In an embodiment, an auxiliary contact housing 470 can be provided on the electromagnetic contactor 10. The auxiliary contact housing 470 is provided on the movable contact assembly 400 and can maintain a certain height regardless of the lifting of the movable shaft 430. The auxiliary contact housing 470 can be electrically connected to an auxiliary contact 250 provided to acquire status information of the electromagnetic contactor 10.

[0073] Therefore, the status information of the electromagnetic contactor 10 can be stably acquired.

[0074] In addition, the electromagnetic contactor 10 is provided with a movable contact support member 480. The movable contact support member 480 is formed to surround the movable contact 410 in one or more directions. The movable contact support member 480 is configured to prevent arbitrary rotation of the movable contact 410.

[0075] Therefore, the movable contact 410 does not rotate in an arbitrary direction with respect to the fixed contact 220, and the contact reliability of the movable contact 410 and the fixed contact 220 can be improved.

[0076] In the illustrated embodiment, the electromagnetic contactor 10 includes a housing 100, an opening and closing portion 200, a core portion 300, and a movable contact assembly 400.

[0077] The housing 100 constitutes the outer shape of the electromagnetic contactor 10. The inside of the housing 100 is formed with a space that can accommodate each of the structures of the electromagnetic contactor 10. The space of the housing 100 can be electrically connectable to an external power source (not shown) and an external load (not shown), respectively.

[0078] In an embodiment, the space of the housing 100 can accommodate the opening and closing portion 200, the core portion 300, and the movable contact assembly 400. At this time, a part of the fixed contact 220 of the opening and closing portion 200 can be exposed to the outside, and can be electrically connectable to the external power source (not shown) and the external load (not shown), respectively.

[0079] The space of the housing 100 is communicated with the outside. In the event of abnormal current conduction, the fixed contact 220 is separated from the movable contact 410, and an arc generated thereby can be discharged to the outside of the housing 100.

[0080] The housing 100 can be made of an electrically insulating material. The housing 100 serves to prevent the occurrence of any electrical connection of the other structures of the electromagnetic contactor 10 to the outside. The housing 100 can be made of a heat-resistant material. This is to prevent damage due to heat generated together with the arc. In an embodiment, the housing 100 can be made of a synthetic resin material.

[0081] The housing 100 accommodates each of the structures of the electromagnetic contactor 10, and the inside thereof can be any shape that can be electrically connectable to an external power source (not shown) and an external load (not shown), respectively. In the illustrated embodiment, the housing 100 is a multi-prism shape having a rectangular cross-section and a height in the upward and downward directions.

[0082] In the illustrated embodiment, the housing 100 includes an upper housing 110, a lower housing 120, a support plate 130, and an inner housing 140.

[0083] The upper housing 110 constitutes a part of the outer shape of the housing 100. The upper housing 110, in combination with the lower housing 120, accommodates the other structures of the electromagnetic contactor 10. In the illustrated embodiment, the upper housing 110 constitutes the upper side of the outer shape of the housing 100.

[0084] The inside of the upper housing 110 is formed with a space. The space is communicated with a space formed in the inside of the lower housing 120. The other structures of the electromagnetic contactor 10, such as the core portion 300 and the movable contact assembly 400, can be movably accommodated in the space.

[0085] The upper housing 110 accommodates the opening and closing portion 200. At this time, the height direction side (i.e., the upper side in the illustrated embodiment) of the fixed contact 220 provided to the opening and closing portion 200 is exposed to the outside of the upper housing 110.

[0086] The upper case 110 accommodates a part of the movable contact assembly 400. At this time, the movable contact assembly 400 can be accommodated in the upper case 110 in a manner that is movable in the height direction thereof (i.e., the up-down direction). Thus, it can also be said that the movable contact assembly 400 is accommodated in the upper case 110 in a manner that is liftable and lowerable.

[0087] The upper case 110 is combined with the lower case 120. In an embodiment, the upper case 110 can be detachably combined with the lower case 120. A space formed inside the upper case 110 can be communicated with a space formed inside the lower case 120.

[0088] The lower case 120 constitutes the remaining part of the outer shape of the case 100. The lower case 120 is combined with the upper case 110 and accommodates the remaining structure of the electromagnetic contactor 10. In the illustrated embodiment, the lower case 120 constitutes the lower side outer shape of the case 100.

[0089] A space is formed inside the lower case 120. The space is communicated with the space formed inside the upper case 110. Other structures of the electromagnetic contactor 10 (e.g., the core 300 and the movable contact assembly 400) can be movably accommodated in the space.

[0090] The lower case 120 accommodates the core 300. At this time, part of the structure of the core 300 is fixed to the lower case 120, and other structures of the core 300 can be accommodated in the lower case 120 in a liftable and lowerable manner.

[0091] The lower case 120 is combined with the upper case 110. As described above, the lower case 120 can be detachably combined with the upper case 110. A space formed inside the lower case 120 can be communicated with a space formed inside the upper case 110.

[0092] A support plate 130 is provided between the upper case 110 and the lower case 120.

[0093] The support plate 130 partially partitions the inner space of the upper case 110 and the inner space of the lower case 120. The support plate 130 supports part of the structure of the movable contact assembly 400 on one side in the height direction (the lower side in the illustrated embodiment).

[0094] In the illustrated embodiment, the support plate 130 supports the movable frame 420 on the lower side. Thus, it can also be said that the support plate 130 also supports the upper magnetic yoke 450, the auxiliary contact case 470, and the movable contact support member 480, which are fixedly combined with the movable frame 420.

[0095] The support plate 130 can be any shape capable of partitioning the interior space of the upper housing 110 and the interior space of the lower housing 120. In the illustrated embodiment, the support plate 130 has the shape of a rectangular plate.

[0096] In the interior of the support plate 130, a through hole is formed through in the thickness direction (i.e., the up-down direction) thereof. The movable shaft 430 is housed in the through hole of the support plate 130 in a manner that is capable of ascending and descending.

[0097] The inner housing 140 supports the auxiliary contact 250 and an auxiliary contact cable 260 that is electrically connectable to the auxiliary contact 250. The inner housing 140 is combined with the auxiliary contact 250 and the auxiliary contact cable 260, respectively.

[0098] The inner housing 140 is housed in the interior space of the upper housing 110. The inner housing 140 is located in the interior of the upper housing 110 and the opening and closing portion 200. Specifically, the inner housing 140 is located between the magnet support member 230 and the arc chamber 210. The interior of the inner housing 140 houses the arc chamber 210. The inner housing 140 is configured to be surrounded by the magnet support member 230.

[0099] The inner housing 140 can be any shape corresponding to the shape of the upper housing 110 and the opening and closing portion 200. In the illustrated embodiment, the inner housing 140 has a rectangular cross section and has a height in the up-down direction, and the lower side thereof is open. One structure (i.e., the arc chamber 210) of the opening and closing portion 200 can be housed in the inner housing 140 through the lower side. The inner housing 140 surrounds the housed arc chamber 210 from the outside.

[0100] The inner housing 140 can include any structure that supports the auxiliary contact 250 and the auxiliary contact cable 260 and is used to be combined with the housing 100 and the opening and closing portion 200.

[0101] In the embodiment illustrated in Figures 7-8 , the inner housing 140 includes an inner housing body 141, a fixed contact through hole 142, an auxiliary contact through hole 143, a magnet member housing portion 144, and an arc chamber housing space 145.

[0102] The inner housing body 141 constitutes the main body of the inner housing 140. The interior of the inner housing body 141 forms a space (i.e., the arc chamber housing space 145). The arc chamber 210 can be housed in the space. In addition, the inner housing body 141 can be housed in the housing housing space 233 formed in the interior of the magnet support member 230.

[0103] One side of the internal case body 141 in the height direction (i.e., the upper side in the illustrated embodiment) is formed with a fixed contact through-hole 142 and an auxiliary contact through-hole 143. Each side of the internal case body 141 in the width direction (the left and right sides in the illustrated embodiment) is formed with a magnet member accommodating portion 144.

[0104] The fixed contact through-hole 142 is a space through which the fixed contact 220 is to be joined. The fixed contact 220 passes through the fixed contact through-hole 142 and can expose at least a portion to the outside of the upper case 110 upward.

[0105] The fixed contact through-hole 142 can be a shape corresponding to the shape of the fixed contact 220. In the illustrated embodiment, the fixed contact through-hole 142 is formed by a space having a circular plate shape with a circular cross section and a thickness in the vertical direction.

[0106] A plurality of fixed contact through-holes 142 can be formed. The plurality of fixed contact through-holes 142 can be arranged apart from each other in the length direction of the internal case body 141 (the left-right direction in the illustrated embodiment). In the illustrated embodiment, a pair of fixed contact through-holes 142 are provided and arranged apart from each other in the left-right direction.

[0107] The number and arrangement of the fixed contact through-holes 142 can be changed in accordance with the number and arrangement of the fixed contacts 220.

[0108] The auxiliary contact through-hole 143 is formed between a pair of fixed contact through-holes 142.

[0109] The auxiliary contact through-hole 143 is a space through which the auxiliary contact 250 is to be joined. The auxiliary contact 250 passes through the auxiliary contact through-hole 143 and can expose at least a portion to the upper side of the internal case body 141. The auxiliary contact 250 can be electrically connected to the auxiliary contact cable 260 on the upper side of the internal case body 141.

[0110] The auxiliary contact through-hole 143 can be a shape corresponding to the shape of the auxiliary contact 250. In the illustrated embodiment, the auxiliary contact through-hole 143 is formed by a space having a circular plate shape with a circular cross section and a thickness in the vertical direction.

[0111] A plurality of auxiliary contact through-holes 143 can be formed. The plurality of auxiliary contact through-holes 143 can be arranged apart from each other in the width direction of the internal case body 141 (the front-rear direction in the illustrated embodiment). In the illustrated embodiment, a pair of auxiliary contact through-holes 143 are provided and arranged apart from each other in the front-rear direction.

[0112] The number and arrangement of the auxiliary contact through-holes 143 can be changed in accordance with the number and arrangement of the auxiliary contacts 250.

[0113] The magnet member accommodating portions 144 are formed on each of the end surfaces in the length direction of the inner case body 141.

[0114] The magnet member accommodating portions 144 can accommodate a portion of the magnet members 240 of the opening and closing portion 200. The magnet members 240 can be exposed in the arc chamber accommodating space 145 through the magnet member accommodating portions 144. The magnet members 240 can form a magnetic field in the arc chamber 210 accommodated in the arc chamber accommodating space 145.

[0115] The magnet member accommodating portions 144 are formed on each of the end surfaces in the length direction of the inner case body 141. In the illustrated embodiment, the magnet member accommodating portions 144 are formed through the left and right side surfaces of the inner case body 141. The magnet member accommodating portions 144 communicate the arc chamber accommodating space 145 with the outside in the length direction (i.e., the left-right direction).

[0116] The magnet member accommodating portions 144 can be in a shape corresponding to the shape of the magnet members 240. In the illustrated embodiment, the magnet member accommodating portions 144 are formed of a rectangular plate-shaped space having a length in the front-rear direction, a height in the up-down direction, and a thickness in the left-right direction.

[0117] A plurality of magnet member accommodating portions 144 can be provided. The plurality of magnet member accommodating portions 144 can accommodate different magnet members 240 from each other. In the illustrated embodiment, a pair of magnet member accommodating portions 144 is provided. The magnet member accommodating portion 144 on the left side accommodates the first magnet member 241. The magnet member accommodating portion 144 on the right side accommodates the second magnet member 242.

[0118] The arc chamber accommodating space 145 accommodates the arc chamber 210 constituting the outer shape of the opening and closing portion 200. The arc chamber accommodating space 145 can be defined as a space formed inside the inner case body 141.

[0119] The arc chamber accommodating space 145 communicates with the fixed contact through-hole 142. The fixed contact 220 accommodated in the arc chamber accommodating space 145 passes through the fixed contact through-hole 142 and can be exposed to the outside of the case 100.

[0120] The arc chamber accommodating space 145 communicates with the auxiliary contact through-hole 143. The auxiliary contact 250 accommodated in the arc chamber accommodating space 145 passes through the auxiliary contact through-hole 143 and can be exposed to the upper side of the inner case body 141.

[0121] The arc chamber accommodation space 145 is communicated with the magnet member accommodation portion 144. The magnet member 240 accommodated in the magnet member accommodation portion 144 can form a magnetic field inside the arc chamber 210 accommodated in the arc chamber accommodation space 145. The formed magnetic field can form an arc extinguish path of an arc generated when the fixed contact 220 is separated from the movable contact 410.

[0122] The opening and closing portion 200 is configured to allow or block a power-on state between a power source (not shown) and a load (not shown) outside electrically connected to the electromagnetic contactor 10 together with the movable contact assembly 400.

[0123] The opening and closing portion 200 is combined with the housing 100. Specifically, the opening and closing portion 200 is accommodated in a space formed inside the housing 100. At this time, part of the structure of the opening and closing portion 200 can be accommodated in a space formed inside the upper housing 110. The remaining structure of the opening and closing portion 200 can be accommodated in a space formed inside the lower housing 120.

[0124] The opening and closing portion 200 can be fixed at a predetermined position of the inner space of the housing 100. In other words, the opening and closing portion 200 is configured not to move at will. Therefore, it can be understood that the power-on state between the power source (not shown) and the load (not shown) outside is achieved by the movable contact assembly 400 movably provided.

[0125] Part of the structure of the opening and closing portion 200 is located outside the inner housing 140. The other structure of the opening and closing portion 200 is located in the arc chamber accommodation space 145 formed inside the inner housing 140.

[0126] In the illustrated embodiment, the opening and closing portion 200 includes the arc chamber 210, the fixed contact 220, the magnet support member 230, the magnet member 240, the auxiliary contact 250, and the auxiliary contact cable 260.

[0127] The arc chamber 210 accommodates the fixed contact 220 and the movable contact 410. As described below, the movable contact 410 can be movably accommodated in the arc chamber 210. When the fixed contact 220 is separated from the movable contact 410 due to the conduction of an abnormal current, the arc chamber 210 can prevent the generated arc from flowing out at will. That is, the arc chamber 210 is configured to prevent other structures of the electromagnetic contactor 10 from being damaged by the arc.

[0128] The inside of the arc chamber 210 can be formed with a magnetic field formed by the magnet member 240. The magnetic field can form a path that makes the generated arc arc extinguish and flow out to the outside.

[0129] The arc chamber 210 can be made of a material having high heat resistance and high strength. It is intended to prevent damage due to heat or pressure generated together with the arc. In an embodiment, the arc chamber 210 can be made of a ceramic material.

[0130] The arc chamber 210 is combined with the inner case 140. The arc chamber 210 is accommodated in the arc chamber accommodation space 145. The arc chamber 210 is configured to be surrounded by the inner case 140.

[0131] The arc chamber 210 can be any shape capable of accommodating the fixed contact 220 and accommodating the movable contact 410 in a manner that the movable contact 410 can move. In the illustrated embodiment, the arc chamber 210 is a solid shape having a rectangular cross section and a height in the up-down direction.

[0132] The arc chamber 210 is combined with the fixed contact 220.

[0133] The fixed contact 220 is a portion of the electromagnetic contactor 10 that can be electrically connected to an external power source (not illustrated) or load (not illustrated). The fixed contact 220 is combined with the upper case 110, the inner case 140, and the arc chamber 210, respectively. The fixed contact 220 extends in the height direction of the case 100 (the up-down direction in the illustrated embodiment).

[0134] One side of the fixed contact 220 in the height direction (the upper side in the illustrated embodiment) is exposed to the outside of the upper case 110. An external power source (not illustrated) or load (not illustrated) can be electrically connected to the fixed contact 220 through the side.

[0135] The other side of the fixed contact 220 in the height direction (the lower side in the illustrated embodiment) is exposed in the inner space of the arc chamber 210. The side of the fixed contact 220 can be in contact with or separated from the movable contact 410.

[0136] As the name implies, the fixed contact 220 is fixedly combined with the upper case 110, the inner case 140, and the arc chamber 210, respectively. Therefore, it can be understood that the contact and separation of the fixed contact 220 with the movable contact 410 is achieved by the movement of the movable contact 410.

[0137] A plurality of fixed contacts 220 can be provided. The plurality of fixed contacts 220 are configured to be spaced apart from each other and can be electrically connected to an external power source (not illustrated) and an external load (not illustrated), respectively. In addition, the plurality of fixed contacts 220 can be in contact with the movable contact 410 at the same time to be electrically connected or separated to be electrically disconnected.

[0138] In the illustrated embodiment, a pair of fixed contacts 220 are provided and arranged apart from each other in the length direction (i.e., the left-right direction) of the housing 100. An auxiliary contact 250 is provided between the pair of fixed contacts 220. In addition, an auxiliary contact housing 470 can be provided between the pair of fixed contacts 220.

[0139] The magnet support member 230 is combined with the magnet member 240 to support the magnet member 240. The magnet member 240 is maintained at a predetermined position by the magnet support member 230, and a magnetic field can be formed inside the arc chamber 210.

[0140] The magnet support member 230 is combined with the inner housing 140. The magnet support member 230 accommodates the inner housing 140 to surround the inner housing 140 on the outside in the horizontal direction (i.e., the front side, the rear side, the left side, and the right side). The magnet support member 230 is arranged opposite the arc chamber 210 with the inner housing 140 interposed therebetween.

[0141] The magnet support member 230 is combined with the magnet member 240. The magnet member 240 can be combined with the arc chamber 210 accommodated in the inner housing 140 and the arc chamber accommodation space 145 in a state combined with the magnet support member 230.

[0142] In the illustrated embodiment, the magnet support member 230 includes a magnet support surface 231, a magnet exposure surface 232, and a housing accommodation space 233.

[0143] The magnet support surface 231 constitutes one surface of the magnet support member 230. The magnet support surface 231 can be defined as a surface of the magnet support member 230 that is not combined with the magnet member 240. The magnet support surface 231 is arranged to surround the outer surface of the inner housing main body 141.

[0144] A pair of magnet support surfaces 231 can be provided. The pair of magnet support surfaces 231 can be arranged opposite each other with the housing accommodation space 233 interposed therebetween. In the illustrated embodiment, the pair of magnet support surfaces 231 are arranged apart from each other in the width direction (i.e., the front-rear direction) of the housing 100. The pair of magnet support surfaces 231 are arranged to surround the front side surface and the rear side surface of the inner housing main body 141, respectively.

[0145] The pair of magnet support surfaces 231 are continuous with the magnet exposure surfaces 232, respectively.

[0146] The magnet exposure surface 232 constitutes the other surface of the magnet support member 230. The magnet exposure surface 232 can be defined as a surface of the magnet support member 230 that is combined with the magnet member 240. The magnet exposure surface 232 is arranged opposite the magnet member accommodation portion 144 with the magnet member 240 interposed therebetween. In other words, the magnet exposure surface 232 is arranged to cover the magnet member accommodation portion 144 from the outside.

[0147] A pair of magnet exposure surfaces 232 can be provided. The pair of magnet exposure surfaces 232 can be disposed in opposition across the housing accommodation space 233. In the illustrated embodiment, the pair of magnet exposure surfaces 232 can be disposed in opposition across the length direction (i.e., the left-right direction) of the housing 100. The pair of magnet exposure surfaces 232 are configured to respectively surround the magnet member accommodation portion 144 from the outside.

[0148] The housing accommodation space 233 is a space formed inside the magnet support member 230. The housing accommodation space 233 accommodates the inner housing 140 and the arc chamber 210 accommodated in the arc chamber accommodation space 145.

[0149] The housing accommodation space 233 can be defined as a space surrounded by the magnet support surface 231 and the magnet exposure surface 232. In the illustrated embodiment, the width direction (i.e., the front-rear direction) of the housing accommodation space 233 is surrounded by the magnet support surface 231. The length direction (i.e., the left-right direction) of the housing accommodation space 233 is surrounded by the magnet exposure surface 232.

[0150] The magnet member 240 is exposed in the housing accommodation space 233. The magnet member 240 can form a magnetic field inside the housing accommodation space 233 and the arc chamber 210 accommodated in the housing accommodation space 233.

[0151] The housing accommodation space 233 can be a shape corresponding to the shape of the inner housing main body 141 or the arc chamber 210. In the illustrated embodiment, the housing accommodation space 233 is formed as a space having a rectangular cross section and a multi-prism shape having a height in the up-down direction.

[0152] The magnet member 240 forms a magnetic field in the internal space of the arc chamber 210. The magnetic field formed by the magnet member 240 can provide a magnetic force that induces an arc. The arc can be extinguished and discharged along a path induced by the magnetic field.

[0153] The magnet member 240 can be provided in any form capable of forming a magnetic field in the internal space of the arc chamber 210. In an embodiment, the magnet member 240 can be provided in the form of a permanent magnet or an electromagnet.

[0154] The magnet member 240 is combined with the inner housing 140. Specifically, the magnet member 240 is accommodated in the magnet member accommodation portion 144 and can be exposed in the arc chamber accommodation space 145. The inner side of the magnet member 240 can be supported by the arc chamber 210 of the arc chamber accommodation space 145.

[0155] The magnet member 240 is combined with the magnet support member 230. The outer side of the magnet member 240 can be supported by the magnet exposure surface 232.

[0156] A plurality of magnet members 240 can be provided. The plurality of magnet members 240 can be configured to form magnetic fields in the internal space of the arc chamber 210, respectively. In the illustrated embodiment, the magnet members 240 include two magnet members, a first magnet member 241 located on the left side and a second magnet member 242 located on the right side, respectively.

[0157] The auxiliary contact 250 can be electrically connected to a substrate member (not shown) for collecting information on the operation state of the electromagnetic contactor 10. The information collected by the substrate member (not shown) can be transmitted to an external control unit (not shown) through the auxiliary contact 250. Thus, even without disassembling the electromagnetic contactor 10, the operation state of the electromagnetic contactor 10 can be easily identified.

[0158] The auxiliary contact 250 is coupled to the internal housing 140 and the arc chamber 210, respectively. The auxiliary contact 250 extends in the height direction of the housing 100 (the upward and downward direction in the illustrated embodiment).

[0159] One side of the auxiliary contact 250 in the height direction (the upper side in the illustrated embodiment) penetrates the auxiliary contact penetration hole 143 and is exposed on the upper side of the internal housing body 141. The upper side of the auxiliary contact 250 can be electrically connected to the auxiliary contact cable 260.

[0160] The other side of the auxiliary contact 250 in the height direction (the lower side in the illustrated embodiment) can be electrically connected to the auxiliary contact terminal 472 of the auxiliary contact housing 470. A substrate member (not shown) provided in the auxiliary contact housing 470 can be electrically connected to the auxiliary contact 250 through the connection.

[0161] The auxiliary contact 250 is located between the pair of stationary contacts 220. In the illustrated embodiment, the auxiliary contact 250 is disposed between the pair of stationary contacts 220 in the length direction of the housing 100 (i.e., the left and right direction).

[0162] A plurality of auxiliary contacts 250 can be provided. The plurality of auxiliary contacts 250 can be spaced apart from each other and can be electrically connected to a plurality of auxiliary contact terminals 472, respectively. In the illustrated embodiment, a pair of auxiliary contacts 250 are provided and are spaced apart in the width direction of the housing 100 (i.e., the front and rear direction). The auxiliary contact housing 470 can be provided on the other side (i.e., the lower side) of the pair of auxiliary contacts 250 in the height direction.

[0163] The auxiliary contact cable 260 electrically connects the auxiliary contact 250 to an external control unit (not shown). The auxiliary contact cable 260 can electrically connect the auxiliary contact 250 and the external control unit (not shown), respectively.

[0164] The auxiliary contact cable 260 is combined with the inner housing 140. A portion of the auxiliary contact cable 260 can be combined with the outer surface of the inner housing body 141 to be supported. The auxiliary contact cable 260 can be electrically connected with the auxiliary contact 250 passing through the auxiliary contact through-hole 143.

[0165] The core 300 can provide a driving force for moving the movable contact 410 toward the fixed contact 220 when an external control power is applied. In addition, the core 300 provides a driving force for moving the movable contact 410 in contact with the fixed contact 220 in a direction away from the fixed contact 220 when the external control power is blocked.

[0166] The core 300 is combined with the housing 100. Specifically, a portion of the core 300 is fixedly disposed in a space formed inside the lower housing 120. In addition, the other structure of the core 300 is movably disposed in the space formed inside the lower housing 120. At this time, the other structure of the core 300 can be disposed to be movable in the height direction (i.e., the up-down direction) of the lower housing 120.

[0167] The core 300 is combined with the movable contact assembly 400. The movable core 320 to be described later is combined with the movable shaft 430 of the movable contact assembly 400, and can move together.

[0168] In the illustrated embodiment, the core 300 includes a fixed core 310, a movable core 320, a core yoke 330, a bobbin 340, a coil 350, a return spring 360, and a cylinder 370.

[0169] The fixed core 310 is magnetized by an applied control power, and provides an attractive force to the movable core 320. By the attractive force applied by the fixed core 310, the movable core 320 and the movable shaft 430 combined therewith can move toward the fixed core 310.

[0170] Therefore, the movable contact 410 combined with the movable shaft 430 also moves together, so that the movable contact 410 and the fixed contact 220 come into contact with each other and are electrically connected.

[0171] The fixed core 310 can be provided in any form that can be magnetized by an external control power to apply an attractive force to the movable core 320. In an embodiment, the fixed core 310 can have the form of an electromagnet.

[0172] The fixed core 310 is combined with the support plate 130. The fixed core 310 is accommodated in a space formed inside the cylinder 370. One side of the fixed core 310 in the height direction (the upper side in the illustrated embodiment) is fixedly combined with the support plate 130. The other side of the fixed core 310 in the height direction (the lower side in the illustrated embodiment) is elastically supported by the return spring 360.

[0173] The movable core 320 moves toward the fixed core 310 by the magnetic attractive force applied by the fixed core 310. In addition, the movable core 320 moves in a direction away from the fixed core 310 by the elastic force applied by the return spring 360.

[0174] The movable core 320 is accommodated in a space formed inside the cylinder 370. The movable core 320 is disposed opposite the support plate 130 with the fixed core 310 interposed therebetween. In the illustrated embodiment, the movable core 320 is positioned below the fixed core 310.

[0175] The movable core 320 is combined with the movable shaft 430. When the movable core 320 moves, the movable shaft 430 can also move. Thus, a portion of the structure of the movable contact assembly 400 can move together with the movable core 320.

[0176] The movable core 320 is elastically supported by the return spring 360. Specifically, one side of the movable core 320 in the height direction (the upper side in the illustrated embodiment) is supported by one end of the return spring 360 in the height direction.

[0177] The movable core 320 can be provided in any form that enables movement toward the fixed core 310 by the magnetic attractive force applied by the fixed core 310. In one embodiment, the movable core 320 can be made of a metal material such as iron (Fe) that can be magnetized.

[0178] The core yoke 330 functions as a fixed core in the magnetic field formed by the coil 350 by the control power applied thereto. The core yoke 330 is magnetized by the magnetic field formed thereby, functioning as an electromagnet.

[0179] The core yoke 330 is combined with the housing 100. Specifically, the core yoke 330 is accommodated in a space formed inside the lower housing 120. One side of the core yoke 330 in the height direction (the upper side in the illustrated embodiment) is provided with the support plate 130.

[0180] The core yoke 330 is disposed so as to surround the bobbin 340 and the coil 350. The core yoke 330 is disposed adjacent to the coil 350 and can be magnetized by the magnetic field formed by the coil 350.

[0181] The bobbin 340 supports the coil 350. The coil 350 can be accommodated in the housing 100 in a state of being wound around the bobbin 340. That is, the bobbin 340 functions as a kind of bobbin.

[0182] The bobbin 340 is combined with the case 100. Specifically, the bobbin 340 is accommodated in a space formed inside the lower case 120. As described above, the bobbin 340 is located radially inside the core yoke 330. The inside of the bobbin 340 is formed with a cavity, which can accommodate the cylinder 370.

[0183] The coil 350 receives a control power from the outside to form a magnetic field. The magnetic field formed by the coil 350 magnetizes the core yoke 330, and can form a magnetic force for moving the movable core 320 toward the fixed core 310.

[0184] The coil 350 is combined with the case 100. Specifically, the coil 350 is accommodated in a space formed inside the lower case 120. The coil 350 is combined with the bobbin 340. The coil 350 can be wound along the outer periphery of the bobbin 340.

[0185] The return spring 360 provides a restoring force for moving the movable core 320, which moves toward the fixed core 310, in a direction away from the fixed core 310. The return spring 360 is located between the fixed core 310 and the movable core 320. The return spring 360 is accommodated in the internal space of the cylinder 370.

[0186] The return spring 360 can be provided in any form capable of storing a restoring force as the movable core 320 moves toward the fixed core 310, and providing the stored restoring force to the movable core 320 when the application of the control power is released. In the illustrated embodiment, the return spring 360 is provided in the form of a coil spring.

[0187] In the illustrated embodiment, the return spring 360 extends in the height direction (i.e., the up-down direction) of the case 100. One end portion of the extension direction of the return spring 360 is in contact with the fixed core 310. The other end portion of the extension direction of the return spring 360 is in contact with the movable core 320. That is, the return spring 360 elastically supports the movable core 320.

[0188] In the illustrated embodiment, the inside of the return spring 360 can be formed with a hollow extending in the length direction (i.e., the up-down direction) thereof. The movable shaft 430 can be passed through the hollow.

[0189] The movable core 320 and the movable shaft 430 combined with the movable core 320 are movably accommodated in the cylinder 370. In the illustrated embodiment, the cylinder 370 extends in the height direction (i.e., the up-down direction) of the case 100, and the movable core 320 and the movable shaft 430 can be accommodated in the cylinder 370 in a manner capable of ascending and descending.

[0190] The cylinder 370 is combined with the bobbin 340. The cylinder 370 can be provided in a cavity formed inside the bobbin 340.

[0191] Referring to Figures 10-18 The electromagnetic contactor 10 according to an embodiment of the present application includes a movable contact assembly 400.

[0192] The movable contact assembly 400 according to an embodiment of the present application includes a plurality of magnetic yokes 450, 460 for canceling electromagnetic repulsive force generated when the fixed contacts 220 come into contact with the movable contact 410. In particular, any one of the plurality of magnetic yokes 450, 460 can be maintained at a predetermined position regardless of movement of the movable contact 410.

[0193] Accordingly, compared to a case in which the plurality of magnetic yokes 450, 460 are all moved, an area in which the plurality of magnetic yokes 450, 460 are arranged to overlap each other can be increased. Accordingly, magnetic attractive force between the plurality of magnetic yokes 450, 460 can be increased, and the electromagnetic repulsive force generated between the fixed contacts 220 and the movable contact 410 can be effectively canceled.

[0194] In addition, the movable contact assembly 400 according to an embodiment of the present application includes an auxiliary contact housing 470 which can be electrically connected with the auxiliary contact 250. The auxiliary contact housing 470 is provided with a substrate member (not shown) and can transmit information about an operation state of the electromagnetic contactor 10 through the auxiliary contact 250.

[0195] Further, the any one of the magnetic yokes 450 of the movable contact assembly 400 according to an embodiment of the present application can be combined with the auxiliary contact housing 470. Accordingly, the overall volume of the movable contact assembly 400 can be reduced and assembly convenience can be improved. Further, the any one of the magnetic yokes 450 can be maintained at a predetermined position regardless of movement of the movable contact 410.

[0196] In the illustrated embodiment, the movable contact assembly 400 includes the movable contact 410, a movable frame 420, a movable shaft 430, a movable spring 440, an upper magnetic yoke 450, a lower magnetic yoke 460, the auxiliary contact housing 470, and a movable contact support member 480.

[0197] The movable contact 410 is configured to come into contact with or be separated from the fixed contacts 220. The movable contact 410 can come into contact with or be separated from a plurality of the fixed contacts 220 at the same time. When the movable contact 410 and the fixed contacts 220 come into contact with each other, an external power source (not shown) and a load (not shown) which can be electrically connected with the electromagnetic contactor 10 can be electrically connected with each other.

[0198] The movable contact 410 is housed in the housing 100. Specifically, the movable contact 410 is movably housed in the inside of the arc chamber 210 housed in the inside space of the upper housing 110. In an embodiment, the movable contact 410 can be housed in the inside of the arc chamber 210 in a manner that is movable in the height direction (i.e., the up-down direction) of the upper housing 110.

[0199] The movable contact 410 is movably combined with the movable frame 420. The movable contact 410 can be relatively moved with respect to the movable frame 420. That is, as described below, the movable frame 420 is combined with the support plate 130 so as not to move arbitrarily.

[0200] The movable contact 410 is combined with the movable shaft 430. When the movable core 320 combined with the movable shaft 430 moves, the movable contact 410 can also move together.

[0201] The movable contact 410 is combined with the movable spring 440. Specifically, the movable contact 410 is elastically supported by the movable spring 440. In the illustrated embodiment, the lower side portion of the movable contact 410 is elastically supported by the movable spring 440.

[0202] The movable contact 410 is disposed adjacent to the upper magnetic yoke 450. The movable contact 410 can be configured so that at least a portion thereof is surrounded by the upper magnetic yoke 450. In the illustrated embodiment, one side (i.e., the upper side) in the height direction and each side (i.e., the front side and the rear side) in the width direction of the movable contact 410 are surrounded by the upper magnetic yoke 450.

[0203] The movable contact 410 is disposed adjacent to the lower magnetic yoke 460. The movable contact 410 is in contact with the lower magnetic yoke 460 and can be supported by the lower magnetic yoke 460. In the illustrated embodiment, the lower side portion of the movable contact 410 is supported by the lower magnetic yoke 460. The movable contact 410 can move together with the lower magnetic yoke 460.

[0204] The movable contact 410 is disposed adjacent to the auxiliary contact housing 470. The movable contact 410 can be configured so that at least a portion thereof is surrounded by the auxiliary contact housing 470. In the illustrated embodiment, one side (i.e., the upper side) in the height direction and each side (i.e., the front side and the rear side) in the width direction of the movable contact 410 are surrounded by the auxiliary contact housing 470.

[0205] The movable contact 410 can be supported by the movable contact support member 480. As described below, the movable contact support member 480 is formed in a manner that surrounds the movable contact 410 at at least one position in the length direction of the movable contact 410. In the illustrated embodiment, one side (i.e., the upper side) in the height direction and each side (i.e., the front side and the rear side) in the width direction of the movable contact 410 are surrounded by the movable contact support member 480.

[0206] The movable contact 410 can be provided in any shape capable of being in contact with and energized by a plurality of the fixed contacts 220 at the same time. In the illustrated embodiment, the movable contact 410 is a multi-prism shape having a length in the left-right direction, a width in the front-rear direction, and a height in the up-down direction.

[0207] At this time, the length of the movable contact 410 in the extension direction (i.e., the left-right direction) can be formed to be greater than the distance at which the pair of fixed contacts 220 are separated from each other. With this structure, the movable contact 410 can be in contact with a plurality of the fixed contacts 220 at the same time.

[0208] The movable frame 420 is disposed adjacent to the movable contact 410.

[0209] The movable frame 420 is a structure of the movable contact assembly 400 that is mounted on the support plate 130. The movable frame 420 can be configured to be fixed to the support plate 130 so as not to move at all.

[0210] The movable frame 420 can be disposed on the lower side of the movable contact 410. The movable frame 420 is disposed adjacent to the movable contact 410 and can be configured to limit the movement distance of the lower side of the movable contact 410.

[0211] The movable frame 420 has a through-hole formed therein. The movable shaft 430 can be coupled to the through-hole so as to be capable of ascending and descending.

[0212] The movable frame 420 is coupled to the auxiliary contact housing 470. The movable frame 420 is detachably coupled to the auxiliary contact housing 470 and can support the auxiliary contact housing 470.

[0213] In the illustrated embodiment, the movable frame 420 includes an auxiliary contact housing accommodation portion 421.

[0214] The auxiliary contact housing accommodation portion 421 surrounds at least a portion of the auxiliary contact housing 470. In an embodiment, the auxiliary contact housing accommodation portion 421 can accommodate a portion of the auxiliary contact housing lug 473. In the illustrated embodiment, the auxiliary contact housing accommodation portion 421 accommodates the lower side portion of the auxiliary contact housing lug 473.

[0215] The auxiliary contact housing accommodation portion 421 forms the outer periphery of the movable frame 420. In the illustrated embodiment, the auxiliary contact housing accommodation portion 421 is recessed in each side (i.e., the front side and the rear side) in the width direction of the movable frame 420.

[0216] In the illustrated embodiment, the auxiliary contact housing accommodation portion 421 can be formed as a space having a rectangular cross section and extending in the up-down direction. The outer side of the auxiliary contact housing accommodation portion 421 (i.e., the front side of the auxiliary contact housing accommodation portion 421 in the front direction and the rear side of the auxiliary contact housing accommodation portion 421 in the rear direction) is open. In addition, the upper side of the auxiliary contact housing accommodation portion 421 is open.

[0217] Accordingly, the auxiliary contact housing boss 473 can be easily accommodated in the auxiliary contact housing accommodation portion 421 to be coupled with the movable frame 420.

[0218] The auxiliary contact housing accommodation portion 421 can be any shape corresponding to the shape of the auxiliary contact housing boss 473. In addition, the number and position of the auxiliary contact housing accommodation portion 421 can vary depending on the number and configuration of the auxiliary contact housing boss 473.

[0219] The movable shaft 430 transmits the movement of the movable core 320 to the movable contact 410. The movable shaft 430 can be coupled with the movable core 320 and the movable contact 410, respectively, and move together.

[0220] The movable shaft 430 extends in the height direction of the housing 100 (the up-down direction in the illustrated embodiment). One side of the movable shaft 430 in the height direction (the upper side in the illustrated embodiment) is coupled with the movable contact 410 through the shaft bracket 431. The other side of the movable shaft 430 in the height direction (the lower side in the illustrated embodiment) is coupled with the movable core 320.

[0221] The movable shaft 430 is accommodated in the housing 100. Specifically, a portion of the movable shaft 430 is accommodated in a space formed inside the upper housing 110 and the lower housing 120, respectively.

[0222] The movable shaft 430 is coupled with the support plate 130. Specifically, the movable shaft 430 can move through an opening portion formed inside the support plate 130.

[0223] The movable shaft 430 is coupled with the movable core 320. The movable shaft 430 passes through a cavity formed inside the return spring 360 and is movably accommodated in the cylinder 370.

[0224] The movable shaft 430 is coupled with the movable contact 410. The movable shaft 430 can move together with the movable contact 410.

[0225] The movable shaft 430 is coupled with the movable frame 420. Specifically, the movable shaft 430 passes through an opening portion formed inside the movable frame 420. The movable shaft 430 is movably coupled with the movable frame 420.

[0226] The movable shaft 430 supports the movable spring 440. Specifically, the movable shaft 430 is in contact with one side (i.e., the lower side) of the movable spring 440 in the length direction. Thus, the movable contact 410 and the lower magnetic yoke 460 can be elastically supported by the movable spring 440.

[0227] The movable shaft 430 is combined with the movable contact support member 480. The movable shaft 430 can move together with the movable contact support member 480.

[0228] In the illustrated embodiment, the movable shaft 430 includes a shaft bracket 431.

[0229] The shaft bracket 431 is a portion of the movable shaft 430 that is combined with other structures of the movable contact assembly 400. In the illustrated embodiment, the shaft bracket 431 is combined with the movable contact 410, the movable spring 440, the lower magnetic yoke 460, and the movable contact support member 480.

[0230] Specifically, the movable contact 410 and the lower magnetic yoke 460 are arranged opposite to the shaft bracket 431 with the movable spring 440 interposed therebetween. The movable contact 410 and the lower magnetic yoke 460 are elastically supported by the movable spring 440.

[0231] In addition, the movable spring 440 is mounted on a side of the shaft bracket 431 that faces the movable contact 410 (i.e., the upper side in the illustrated embodiment). Furthermore, the movable contact support member 480 is directly combined with the shaft bracket 431.

[0232] The shaft bracket 431 is located on one side (the upper side in the illustrated embodiment) of the movable shaft 430 in the length direction. The shaft bracket 431 is located on the upper side of the support plate 130 and the movable frame 420. At this time, the shaft bracket 431 can be formed to have a cross-sectional area that is larger than the cross-sectional area of the through hole formed inside the support plate 130 or the movable frame 420.

[0233] Thus, the shaft bracket 431 cannot pass through the through hole formed inside the support plate 130 or the movable frame 420, and can be maintained on the upper side of the support plate 130 and the movable frame 420.

[0234] In addition, the position to which the movable shaft 430 can move in a direction away from the fixed contact 220 (i.e., the lower side in the illustrated embodiment) can be limited at a position at which the movable shaft 430 is in contact with the movable frame 420.

[0235] The movable spring 440 elastically supports the movable contact 410 and the lower magnetic yoke 460. The movable spring 440 is disposed between the movable contact 410 and the lower magnetic yoke 460 and the shaft bracket 431. The movable spring 440 is disposed on the lower side of the movable contact 410 and the lower magnetic yoke 460.

[0236] The movable spring 440 extends between the shaft holder 431 and the lower magnetic yoke 460. In the illustrated embodiment, the movable spring 440 extends in the extension direction of the movable shaft 430, i.e., the up-down direction. An end portion of the extension direction of the movable spring 440, i.e., the upper side end portion, is in contact with the lower magnetic yoke 460. The other end portion of the extension direction of the movable spring 440, i.e., the lower side end portion, is supported by the shaft holder 431.

[0237] When the movable shaft 430 moves toward the fixed contact 220, the movable spring 440 is pressed against the shaft holder 431 to store a restoring force and moves together. The stored restoring force presses the movable contact 410 in the direction toward the fixed contact 220, and the contact state between the fixed contact 220 and the movable contact 410 can be stably maintained.

[0238] The upper magnetic yoke 450 forms a magnetic attractive force together with the lower magnetic yoke 460. The magnetic attractive force formed by the upper magnetic yoke 450 and the lower magnetic yoke 460 can cancel the electromagnetic repulsive force generated when the fixed contact 220 and the movable contact 410 are in contact. Thus, the formation and maintenance of the contact state of the fixed contact 220 and the movable contact 410 can be stably performed.

[0239] The upper magnetic yoke 450 can be provided in any form capable of forming a magnetic attractive force together with the lower magnetic yoke 460. In one embodiment, the upper magnetic yoke 450 can be provided as a magnet (e.g., a permanent magnet, etc.) exhibiting magnetism.

[0240] The upper magnetic yoke 450 is provided adjacent to the movable contact 410. At this time, the upper magnetic yoke 450 does not come into contact with the movable contact 410, but can be configured to surround at least a portion of the movable contact 410. In the illustrated embodiment, the upper magnetic yoke 450 surrounds a portion of the movable contact 410 in the height direction and the width direction. That is, in the illustrated embodiment, the upper magnetic yoke 450 can surround a portion of the upper side and a portion of the front side, the rear side of the movable contact 410, respectively.

[0241] The upper magnetic yoke 450 is provided adjacent to the lower magnetic yoke 460. The upper magnetic yoke 450 can be configured to surround the lower magnetic yoke 460 from the outside. In the illustrated embodiment, the upper magnetic yoke 450 surrounds a portion of the lower magnetic yoke 460 in the height direction and the width direction. That is, in the illustrated embodiment, the upper magnetic yoke 450 can surround a portion of the upper side and a portion of the front side, the rear side of the lower magnetic yoke 460, respectively.

[0242] In particular, the electromagnetic contactor 10 according to the embodiment of the present application can be configured to minimize the distance between the upper magnetic yoke 450 and the lower magnetic yoke 460. This is achieved by the combination of the upper magnetic yoke 450 and the auxiliary contact housing 470.

[0243] That is, the upper magnetic yoke 450 is combined with the auxiliary contact housing 470 without moving together with the movable contact 410 or the movable shaft 430. In other words, the upper magnetic yoke 450 can be maintained at a predetermined position by the auxiliary contact housing 470 combined with the fixedly configured movable frame 420.

[0244] That is, as shown in FIG. 4, the upper magnetic yoke 450 is indirectly combined with the movable frame 420 through the auxiliary contact housing 470. As described above, the movable frame 420 is supported by the support plate 130 to be immobile regardless of the movable shaft 430. Figures 17-18

[0245] With the combination of the upper magnetic yoke 450 and the auxiliary contact housing 470, the shaft bracket 431 can reduce the volume corresponding to the portion combined with the upper magnetic yoke 450. In addition, the magnitude of the force required for the movement of the movable core 320 can also be reduced in correspondence with the weight of the upper magnetic yoke 450 and the amount of reduction of the volume of the shaft bracket 431.

[0246] The lower magnetic yoke 460 forms a magnetic attraction force together with the upper magnetic yoke 450. As described above, the magnetic attraction force can cancel the electromagnetic repulsive force generated between the fixed contact 220 and the movable contact 410.

[0247] The lower magnetic yoke 460 can also be provided in any form capable of forming a magnetic attraction force together with the upper magnetic yoke 450. In an embodiment, the lower magnetic yoke 460 can be provided as a magnet (e.g., a permanent magnet, etc.) exhibiting magnetism, like the upper magnetic yoke 450.

[0248] The lower magnetic yoke 460 is disposed adjacent to the movable contact 410. The lower magnetic yoke 460 is disposed on the other side (i.e., the lower side) of the movable contact 410 in the height direction. The lower magnetic yoke 460 supports the movable contact 410 on the lower side.

[0249] The lower magnetic yoke 460 is elastically supported by the movable spring 440. In the illustrated embodiment, the lower side of the lower magnetic yoke 460 is in contact with and supported by the upper end portion of the movable spring 440.

[0250] At least a portion of the lower magnetic yoke 460 is surrounded by the upper magnetic yoke 450 and the auxiliary contact housing 470 combined with the upper magnetic yoke 450. In the illustrated embodiment, the upper side, the front side, and the rear side of the lower magnetic yoke 460 are surrounded by the upper magnetic yoke 450 and the auxiliary contact housing 470, respectively.

[0251] In addition, the lower magnetic yoke 460 can move together with the movable shaft 430. At this time, when the movable contact 410 moves to be in contact with the fixed contact 220, the lower magnetic yoke 460 can be disposed at least partially overlapping the upper magnetic yoke 450 in the horizontal direction. Detailed descriptions thereof will be made later.

[0252] ​The auxiliary contact housing 470 includes a substrate member (not shown) to which the auxiliary contact 250 is electrically connected. The substrate member (not shown) can acquire the operation state information of the electromagnetic contactor 10 and transmit the information to the outside through the auxiliary contact 250.

[0253] In addition, the auxiliary contact housing 470 is combined with the upper magnetic yoke 450 to support the same. As described above, as the upper magnetic yoke 450 is combined on the auxiliary contact housing 470, the position of the upper magnetic yoke 450 can be maintained constant regardless of the movement of the movable shaft 430.

[0254] The auxiliary contact housing 470 is accommodated in the housing 100. Specifically, the auxiliary contact housing 470 is accommodated in the space formed inside the upper housing 110.

[0255] The auxiliary contact housing 470 is combined with the auxiliary contact 250 to be electrically connected. At this time, the auxiliary contact housing 470 does not move, and the auxiliary contact housing 470 can be combined with the auxiliary contact 250 to maintain the state of electrical connection.

[0256] The auxiliary contact housing 470 is combined with the movable frame 420. At this time, at least a portion of the auxiliary contact housing 470 can be accommodated in the auxiliary contact housing accommodation portion 421 and can be supported by the movable frame 420.

[0257] The auxiliary contact housing 470 is combined with the upper magnetic yoke 450. A portion of the auxiliary contact housing 470 (lower portion in the illustrated embodiment) toward the movable contact 410 is combined with the upper magnetic yoke 450.

[0258] The auxiliary contact housing 470 can be any shape that is electrically connected to the auxiliary contact 250 and can be combined with the upper magnetic yoke 450 to support the same. In the illustrated embodiment, the auxiliary contact housing 470 is a three-dimensional shape having a length in the front-rear direction, a width in the left-right direction, and a height in the up-down direction.

[0259] At this time, the inside of the auxiliary contact housing 470 is formed with a space (i.e., a movable contact accommodation space 474 to be described later) to accommodate the movable contact 410 and the lower magnetic yoke 460 in a manner that the movable contact 410 and the lower magnetic yoke 460 can move.

[0260] In the illustrated embodiment, the auxiliary contact housing 470 includes an auxiliary contact plate 471, an auxiliary contact terminal 472, an auxiliary contact housing boss 473, and a movable contact accommodation space 474.

[0261] The auxiliary contact plate 471 constitutes a portion of the auxiliary contact housing 470. The auxiliary contact plate 471 supports the substrate member (not shown). The auxiliary contact plate 471 is provided with the auxiliary contact terminal 472 thereon.

[0262] The auxiliary contact plate 471 is continuous with the auxiliary contact housing boss 473. In the illustrated embodiment, the auxiliary contact plate 471 is continuous with the auxiliary contact housing boss 473 at each end portion thereof in the extending direction (i.e., the front side end portion and the rear side end portion).

[0263] The auxiliary contact plate 471 encloses a portion of the movable contact accommodation space 474. In the illustrated embodiment, the auxiliary contact plate 471 encloses the movable contact accommodation space 474 in the height direction (i.e., the upper side).

[0264] The auxiliary contact plate 471 can be any shape that supports the substrate member (not shown) and the auxiliary contact terminal 472, is continuous with the auxiliary contact housing boss 473, and encloses the movable contact accommodation space 474. In the illustrated embodiment, the auxiliary contact plate 471 is provided in the shape of a plate having a length in the front-rear direction and a width in the left-right direction.

[0265] At this time, a guide (not assigned a reference numeral) that extends in the height direction can be formed on each end portion of the auxiliary contact plate 471 in the width direction. The guide is configured to prevent any of the substrate member (not shown) or the auxiliary contact terminal 472 from coming off.

[0266] The auxiliary contact terminal 472 is electrically connectable with the auxiliary contact 250. In addition, the auxiliary contact terminal 472 is electrically connectable with the substrate member (not shown). Information collected by the substrate member (not shown) can be transmitted to the outside through the auxiliary contact terminal 472 and the auxiliary contact 250.

[0267] The auxiliary contact terminal 472 is combined with the auxiliary contact plate 471. The auxiliary contact terminal 472 is positioned on the upper side of the auxiliary contact plate 471. In other words, the auxiliary contact terminal 472 is disposed opposite the auxiliary contact housing boss 473 with the auxiliary contact plate 471 interposed therebetween.

[0268] The auxiliary contact terminal 472 is combined with the auxiliary contact 250. The auxiliary contact terminal 472 is maintained at a predetermined position regardless of movement of the movable shaft 430, and the auxiliary contact 250 and the auxiliary contact terminal 472 can maintain a state of contact and electrical conduction during operation of the electromagnetic contactor 10.

[0269] A plurality of auxiliary contact terminals 472 can be provided. The plurality of auxiliary contact terminals 472 are spaced apart from each other to be combined with and electrically connected to the plurality of auxiliary contacts 250, respectively. In the illustrated embodiment, two auxiliary contact terminals 472 are provided to be disposed spaced apart from each other in the length direction of the auxiliary contact plate 471 (i.e., the front-rear direction).

[0270] In one embodiment, the auxiliary contact terminal 472 can be elastically coupled with the auxiliary contact 250. In the embodiment, the auxiliary contact terminal 472 presses the auxiliary contact 250 and is coupled with and energized by the auxiliary contact 250.

[0271] The auxiliary contact housing boss 473 constitutes the other part of the auxiliary contact housing 470. The auxiliary contact housing boss 473 is the part of the auxiliary contact housing 470 that is coupled with the movable frame 420. Specifically, at least a part of the auxiliary contact housing boss 473 is accommodated in the auxiliary contact housing accommodation portion 421.

[0272] The auxiliary contact housing boss 473 is continuous with the auxiliary contact plate 471. The auxiliary contact housing boss 473 extends in the height direction of the auxiliary contact housing 470 (the up-down direction in the illustrated embodiment). At this time, the auxiliary contact housing boss 473 can constitute a predetermined angle with the end portion of the length direction of the auxiliary contact plate 471 and be continuous.

[0273] A plurality of auxiliary contact housing bosses 473 can be provided. The plurality of auxiliary contact housing bosses 473 can be arranged apart from each other in the length direction of the auxiliary contact plate 471. The plurality of auxiliary contact housing bosses 473 can surround a part of the upper magnetic yoke 450 and the movable contact accommodation space 474 at different positions from each other.

[0274] In the illustrated embodiment, a pair of auxiliary contact housing bosses 473 is provided and arranged apart in the front-rear direction. The auxiliary contact housing boss 473 located on the front side surrounds the movable contact accommodation space 474 and the upper magnetic yoke 450 on the front side. The auxiliary contact housing boss 473 located on the rear side surrounds the movable contact accommodation space 474 and the upper magnetic yoke 450 on the rear side.

[0275] The space surrounded by the auxiliary contact plate 471 and the auxiliary contact housing boss 473 can be defined as the movable contact accommodation space 474.

[0276] The movable contact 410 and the lower magnetic yoke 460 are movably accommodated in the movable contact accommodation space 474. The movable contact 410 and the lower magnetic yoke 460 can move in the direction toward the fixed contact 220 and the direction away from the fixed contact 220 in the state of being accommodated in the movable contact accommodation space 474.

[0277] A part of the upper magnetic yoke 450 is accommodated in the movable contact accommodation space 474. The structure of the part of the upper magnetic yoke 450 is coupled with the auxiliary contact plate 471, and the remaining structure is exposed in the movable contact accommodation space 474. The remaining structure of the upper magnetic yoke 450 can be arranged to surround the movable contact 410 and the lower magnetic yoke 460.

[0278] The movable contact support member 480 prevents occurrence of a condition in which the movable contact 410 is separated from the movable shaft 430. The movable contact support member 480 is combined with the movable contact 410 and the shaft bracket 431, respectively.

[0279] The movable contact support member 480 can be formed so as to surround at least a portion of the movable contact 410. In the illustrated embodiment, the movable contact support member 480 surrounds an upper side portion, a front side portion, and a rear side portion of the movable contact 410.

[0280] The movable contact support member 480 is combined with the shaft bracket 431. One side (lower side in the illustrated embodiment) of the movable contact support member 480 in the height direction can be fixedly combined on the shaft bracket 431.

[0281] A plurality of movable contact support members 480 can be provided. The plurality of movable contact support members 480 can be arranged apart from each other in the length direction of the movable contact 410. The plurality of movable contact support members 480 can support the movable contact 410 at different positions from each other.

[0282] In the illustrated embodiment, a pair of movable contact support members 480 are provided and arranged apart from each other in the left-right direction. The pair of movable contact support members 480 are arranged opposite each other with the auxiliary contact housing 470 interposed therebetween.

[0283] The movable contact support member 480 can be divided into a plurality of portions continuous with each other. In the illustrated embodiment, the movable contact support member 480 includes a first extension portion provided on the front side and extending in the up-down direction so as to surround the front side of the movable contact 410, a second extension portion provided on the upper side and extending in the front-rear direction so as to surround the upper side of the movable contact 410, and a third extension portion provided on the rear side and extending in the up-down direction so as to surround the rear side of the movable contact 410.

[0284] At this time, lower side end portions of the first extension portion and the third extension portion are combined with the shaft bracket 431. Upper side end portions of the first extension portion and the third extension portion extend at a predetermined angle from front side and rear side end portions of the second extension portion, respectively. In one embodiment, the predetermined angle can be a right angle.

[0285] In addition, the movable contact support member 480 can be configured to support the movable contact 410 in the width direction rather than the surface direction. In other words, the movable contact support member 480 can support the movable contact 410 in a linear contact rather than a surface contact. Thus, with respect to a vibration load applied by the movable contact 410, arbitrary shaking of the movable contact 410 can be effectively suppressed by enhancing the rigidity of the movable contact support member 480.

[0286] In an embodiment, the movable contact support member 480 can be configured to be in contact with the movable contact 410. In the embodiment, it is possible to more effectively prevent any rotation or disengagement of the movable contact 410.

[0287] In other embodiments, the movable contact 410 can be formed with a groove corresponding to the movable contact support member 480. In the embodiment, it is possible to more stably maintain the combined state of the movable contact 410 and the movable contact support member 480.

[0288] As described above, when the movable core 320 moves, the movable shaft 430 combined therewith can also move together. At this time, the movable contact 410, the movable spring 440, the lower magnetic yoke 460, and the movable contact support member 480 move together with the movable shaft 430, but the auxiliary contact housing 470 and the upper magnetic yoke 450 combined therewith do not move.

[0289] Accordingly, the force required for the movement of the movable contact 410 and other structures can be significantly reduced compared to the case where the auxiliary contact housing 470 and the upper magnetic yoke 450 move together with the movable shaft 430. Accordingly, even if the strength of the magnetic force between the fixed core 310 and the movable core 320 decreases, it is still possible to easily perform the movement of the movable contact 410 and the contact with the fixed contact 220.

[0290] Further, the upper magnetic yoke 450 can be maintained at a predetermined position regardless of the movement of the movable shaft 430. Accordingly, the distance between the upper magnetic yoke 450 and the lower magnetic yoke 460 can be reduced compared to the case where the upper magnetic yoke 450 and the movable shaft 430 move together.

[0291] Accordingly, by applying a magnetic attractive force of a sufficient strength between the upper magnetic yoke 450 and the lower magnetic yoke 460, it is possible to effectively offset the electromagnetic repulsive force generated between the fixed contact 220 and the movable contact 410.

[0292] Referring to Figures 19-22 The operation of the electromagnetic contactor 10 according to an embodiment of the present application is illustrated by way of example.

[0293] Figures 19-20 The state in which the electromagnetic contactor 10 blocks the conduction between the external power source (not shown) and the load (not shown) is illustrated. In the illustrated embodiment, the movable contact 410 and the fixed contact 220 are disposed apart in the up-and-down direction.

[0294] At this time, as shown in Figure 20 the lower side end portion of the upper magnetic yoke 450 is disposed at a position lower than the upper side end portion of the lower magnetic yoke 460. In the embodiment, it can be considered that the upper magnetic yoke 450 and the lower magnetic yoke 460 are disposed in a manner of at least partially overlapping in the horizontal direction.

[0295] Figures 21-22 The electromagnetic contactor 10 is shown in a state in which the external power source (not shown) and the load (not shown) are connected in a manner that the external power source (not shown) and the load (not shown) are energized to each other. In the illustrated embodiment, the movable contact 410 is in contact with the fixed contact 220. Thus, an electromagnetic repulsive force can be generated between the movable contact 410 and the fixed contact 220.

[0296] At this time, as shown in Figure 22 , the lower side end portion of the upper magnetic yoke 450 is disposed at a position lower than the upper side end portion of the lower magnetic yoke 460. In other words, the upper magnetic yoke 450 and the lower magnetic yoke 460 are disposed in a manner that at least a portion thereof overlaps in the horizontal direction. At this time, it should be understood that Figure 22 , the area in which the upper magnetic yoke 450 and the lower magnetic yoke 460 overlap in the state shown in Figure 20 is larger than the area in which the upper magnetic yoke 450 and the lower magnetic yoke 460 overlap in the state shown in

[0297] Thus, in the state shown in Figures 21-22 , that is, the state in which the movable contact 410 is in contact with the fixed contact 220 and is energized, the strength of the magnetic attractive force formed between the upper magnetic yoke 450 and the lower magnetic yoke 460 further increases. Thus, it is possible to stably form and maintain the contact state of the movable contact 410 and the fixed contact 220.

[0298] Although the embodiments of the present application have been described above, the idea of the present application is not limited to the embodiments disclosed in the present specification, and other embodiments can be easily proposed by those skilled in the art who understand the idea of the present application by adding, changing, deleting, adding constituent elements, etc. within the range of the same idea, but this should be within the range of the idea of the present application.

[0299] 10: electromagnetic contactor; 100: housing;

[0300] 110: upper housing; 120: lower housing;

[0301] 130: support plate; 140: inner housing;

[0302] 141: inner housing main body; 142: fixed contact through hole;

[0303] 143: auxiliary contact through hole; 144: magnet member accommodating portion;

[0304] 145: arc chamber accommodating space; 200: opening and closing portion;

[0305] 210: arc chamber; 220: fixed contact;

[0306] 230: magnet support member; 231: magnet support surface;

[0307] 232: magnet exposed surface; 233: housing accommodation space;

[0308] 240: magnet member; 241: first magnet member;

[0309] 242: second magnet member; 250: auxiliary contact;

[0310] 260: auxiliary contact cable; 300: core;

[0311] 310: fixed core; 320: movable core;

[0312] 330: core yoke; 340: bobbin;

[0313] 350: coil; 360: return spring;

[0314] 370: cylinder; 400: movable contact assembly;

[0315] 410: movable contact; 420: movable frame;

[0316] 421: auxiliary contact housing accommodation portion; 430: movable shaft;

[0317] 431: shaft bracket; 440: movable spring;

[0318] 450: upper yoke; 460: lower yoke;

[0319] 470: auxiliary contact housing; 471: auxiliary contact plate;

[0320] 472: auxiliary contact terminal; 473: auxiliary contact housing boss;

[0321] 474: movable contact accommodation space; 480: movable contact support member.

Claims

1. A movable contact assembly, characterized by includes: a movable contact configured to be movable in a direction toward a fixed contact and a direction away from the fixed contact, a movable shaft coupled to the movable core so as to be movable together with the movable core, coupled to the movable contact, and a movable contact support member coupled to the movable shaft, formed to surround at least a portion of the movable contact; the movable contact is formed to have a length in one direction and a width in another direction, the movable contact support member surrounds the movable contact in the other direction.

2. The movable contact assembly according to claim 1, wherein a plurality of the movable contact support members are provided, and the plurality of the movable contact support members are spaced apart in the one direction and surround the movable contact at a plurality of positions.

3. The movable contact assembly according to claim 2, wherein a pair of the movable contact support members are provided, and the pair of the movable contact support members are disposed apart from each other in the one direction.

4. The movable contact assembly according to claim 3, wherein a pair of the fixed contacts are provided and disposed apart from each other in the one direction, and the pair of the movable contact support members are disposed between the pair of the fixed contacts in the one direction.

5. The movable contact assembly according to claim 1, wherein the movable contact support member includes: a first extension portion extending in a direction toward the fixed contact, surrounding one edge of the movable contact in a width direction, a second extension portion continuous with the first extension portion, extending in the other direction, surrounding one edge of the movable contact in a height direction, and a third extension portion continuous with the second extension portion, extending in a direction toward the fixed contact, surrounding another edge of the movable contact in the width direction.

6. The movable contact assembly according to claim 1, wherein the movable contact support member is in contact with the movable contact.

7. The movable contact assembly according to claim 1, wherein the movable contact includes: a groove recessed in a position corresponding to the movable contact support member in a shape corresponding to the movable contact support member.

8. The movable contact assembly according to claim 1, wherein the movable shaft includes: a shaft holder disposed opposite the fixed contact with the movable contact interposed therebetween; the movable contact support member is coupled to the shaft holder and surrounds at least a portion of a surface of the movable contact opposite the shaft holder.

9. The movable contact assembly of claim 8, wherein, includes: a movable spring provided between the movable contact and the shaft holder, elastically supporting the movable contact.

10. An electromagnetic contactor characterized by comprising: includes: a housing in which a space is formed inside, an opening and closing portion coupled to the housing, connected to an external power source and a load, respectively, in a manner that allows electric conduction, and a movable contact assembly configured to be movably accommodated in the housing, performing electric conduction by being in contact with the opening and closing portion or blocking electric conduction by being separated from the opening and closing portion; the opening and closing portion includes: a stationary contact provided on one side in a height direction of the housing, a part of one side of the stationary contact being exposed to the outside of the housing to be electrically connected to a power source and a load outside, a movable core provided on the other side in the height direction of the housing and configured to be movable in a direction toward the stationary contact and a direction away from the stationary contact, the movable contact assembly including: a movable shaft combined with the movable core to be movable together with the movable core, a movable contact combined with the movable shaft to be movable together, and a movable contact support member combined with the movable shaft and formed to surround at least a part of the movable contact to prevent any shaking of the movable contact.

11. The electromagnetic contact according to claim 10, wherein the movable contact extends in a direction, a plurality of the movable contact support members are provided, and the plurality of the movable contact support members are arranged apart from each other in the direction.

12. The electromagnetic contact according to claim 11, wherein a pair of the stationary contacts are provided, and the pair of the stationary contacts are arranged apart from each other in the direction, the plurality of the movable contacts are provided between the pair of the stationary contacts in the direction.

13. The electromagnetic contact according to claim 10, wherein the movable contact support member includes: a first extension portion extending in a height direction of the movable contact to surround one side in a width direction of the movable contact, a second extension portion continuous with the first extension portion and extending in a width direction of the movable contact to surround one side in the height direction of the movable contact, and a third extension portion continuous with the second extension portion and extending in the height direction of the movable contact to surround the other side in the width direction of the movable contact.

14. The electromagnetic contact according to claim 13, wherein one end portion of the first extension portion is continuous with the second extension portion at a predetermined angle, and the other end portion of the first extension portion is combined with the movable shaft, one end portion of the third extension portion is continuous with the second extension portion at a predetermined angle, and the other end portion of the third extension portion is combined with the movable shaft.

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