Movable contact module, movable contact assembly, movable contact device and contactor

Abstract

SOLUTION: A movable contact module for a contactor includes an insulating member (12) including an insulating object (120) and a through hole (102) penetrating the insulating object, and a movable contact (11) including a fixed portion fixed to the insulating object and an exposed portion (111) exposed from the insulating object, in which the fixed portion of the movable contact (11) is wrapped in the insulating object (120) such that the movable contact (11) is electrically isolated from a drive shaft passing through the through hole, and the insulating member (12) includes a peripheral wall (121, 122, 124) protruding from the insulating object (120) and surrounding the opening of the through hole (102) in order to increase the creepage distance between the drive shaft passing through the through hole (102) and the exposed portion of the movable contact (11).EFFECT: It is possible to determine whether a movable contact has a welding defect on the basis of the state of an auxiliary switch, and this improves the safety of a contactor.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of Chinese Patent Application No. CN202210858080.9, filed on July 20, 2022, with the State Intellectual Property Office of China, the entire disclosure of which is incorporated herein by reference.

[0002] The present invention relates to a contactor movable contact module, a contactor movable contact assembly comprising a contactor movable contact module, a contactor movable contact device including a contactor movable contact assembly, and a contactor including a contactor movable contact device. [Background technology]

[0003] In the prior art, a contactor typically includes a housing, a movable contact, a stationary contact, a drive shaft, a coil, a magnetic core, and a magnetic conducting component. The stationary contact, the coil, and the magnetic conducting component are fixedly disposed in the housing. The movable contact, the drive shaft, and the magnetic core are movably disposed in the housing. When the coil is energized, it generates a magnetic field, which generates an electromagnetic force on the drive shaft and the magnetic core. Under the action of the electromagnetic force, the drive shaft drives the movable contact to move to a closed position in contact with the stationary contact. When the coil is de-energized, the magnetic field and electromagnetic force disappear, and the drive shaft drives the movable contact to an open position in which it separates from the stationary contact under the action of a return spring.

[0004] In the prior art, for applications without dielectric isolation requirements, the drive shaft is usually directly connected to the movable contact. For applications with dielectric isolation requirements, safety standards require that the coil circuit and contact circuit meet certain insulation distance requirements. However, in existing technologies, the creepage distance between the movable contact and the drive shaft is relatively short, which does not meet the high-voltage isolation requirements.

[0005] In addition, in the prior art, an auxiliary switch and an auxiliary switch pressing portion are required to detect the state of the main contact. In the prior art, the auxiliary switch pressing portion is usually connected to the drive shaft and moves synchronously with the drive shaft. When the drive shaft drives the movable contact to the closed position, the auxiliary switch pressing portion presses the auxiliary switch to trigger the auxiliary switch. When the drive shaft drives the movable contact to the open position, the auxiliary switch pressing portion separates from the auxiliary switch to release the auxiliary switch and return it to its initial state. Therefore, the position of the movable contact can be determined based on the state of the auxiliary switch. That is, when the auxiliary switch is in a triggered state, the movable contact is determined to be in a closed position, and when the auxiliary switch is in an initial state, the movable contact is determined to be still in an open position. However, due to the elastic connection between the movable contact and the drive shaft, the drive shaft may move an over-travel distance relative to the movable contact. Therefore, even if the movable contact and the stationary contact cannot be separated from each other due to melting or other defects, the drive shaft may move an over-stroke distance under the action of the spring, causing the auxiliary switch pressing portion to release the auxiliary switch and return the auxiliary switch to its initial state. Therefore, in the prior art, there is uncertainty in determining whether the movable contact has melting or other defects based on the state of the auxiliary switch, which affects safety in use. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made to overcome or mitigate at least one aspect of the above disadvantages. [Means for solving the problem]

[0007] According to one aspect of the present invention, there is provided a contactor movable contact module comprising: an insulating member having an insulating object and a through hole penetrating the insulating object; and a movable contact having a fixed portion fixed to the insulating object and an exposed portion exposed from the insulating object. The fixed portion of the movable contact is enclosed in the insulating object so that the movable contact is electrically isolated from a drive shaft passing through the through hole, and the insulating member further includes a peripheral wall protruding from the insulating object and surrounding an opening of the through hole to increase the creepage distance between the drive shaft passing through the through hole and the exposed portion of the movable contact.

[0008] According to an exemplary embodiment of the present invention, the insulating body has a top surface and a bottom surface that are opposite in a thickness direction, and the peripheral walls include a first peripheral wall that protrudes from the top surface of the insulating body and surrounds the upper opening of the through hole, and a second peripheral wall that protrudes from the bottom surface of the insulating body and surrounds the bottom opening of the through hole.

[0009] According to another exemplary embodiment of the present invention, the insulating body has left and right sides opposite in its longitudinal direction, and two ends of the movable contact are exposed from the left and right sides of the insulating body, respectively.

[0010] According to another exemplary embodiment of the present invention, the insulating member further comprises a plurality of isolation walls protruding from the upper surface of the insulating body, the plurality of isolation walls being arranged on radially opposite sides of the through hole, and the isolation walls extending along the width and thickness directions of the insulating body to further increase the creepage distance between the drive shaft passing through the through hole and the exposed end of the movable contact.

[0011] According to another exemplary embodiment of the present invention, the isolation wall is disposed in an internal cavity surrounded by the first peripheral wall and is separated from the first peripheral wall in the radial direction of the through hole.

[0012] According to another exemplary embodiment of the present invention, the insulating body has a front side and a rear side that are opposite in a width direction thereof, an opening that opens toward the front side of the insulating body is formed in the first peripheral wall, and the insulating member further includes at least a pair of side walls connected to either side of the opening in the first peripheral wall, the side walls extending along the thickness direction and width direction of the insulating body to further increase the creepage distance between the drive shaft passing through the through hole and the exposed end of the movable contact.

[0013] According to another exemplary embodiment of the present invention, the side wall extends from the first perimeter wall to a bottom surface of the insulating body and is connected to a front side of the insulating body.

[0014] According to another exemplary embodiment of the present invention, the second peripheral wall includes a second inner peripheral wall protruding from the bottom surface of the insulating body and surrounding a bottom opening of the through hole, and a second outer peripheral wall protruding from the bottom surface of the insulating body and surrounding the second inner peripheral wall, the second outer peripheral wall and the second inner peripheral wall being spaced apart in the radial direction of the through hole and extending along the circumferential and axial directions of the through hole to increase the creepage distance between the drive shaft passing through the through hole and the exposed end of the movable contact.

[0015] According to another exemplary embodiment of the present invention, the extension height of the second inner peripheral wall in the axial direction of the through hole is equal to or unequal to the extension height of the second outer peripheral wall in the axial direction of the through hole.

[0016] According to another exemplary embodiment of the present invention, the second inner peripheral wall extends continuously along the circumferential direction of the through hole, and the second outer peripheral wall has an opening formed therein that opens toward the front side of the insulating body, or the second outer peripheral wall is a continuous peripheral wall without any openings.

[0017] According to another exemplary embodiment of the present invention, the insulating member further includes an auxiliary switch pressing portion for triggering the auxiliary switch such that the auxiliary switch pressing portion moves synchronously with the movable contact.

[0018] According to another exemplary embodiment of the present invention, the insulating member and the movable contact are formed as a single injection molded piece such that the insulating member and the movable contact are directly bonded to one another.

[0019] According to another aspect of the present invention, there is provided a movable contact assembly for a contactor, the movable contact assembly comprising the contactor movable contact module described above and a drive shaft passing through a through hole in the insulating member, the drive shaft being resiliently connected to the contactor movable contact module for driving the movable contact to move between a closed position in electrical contact with the stationary contact and an open position in electrical isolation from the stationary contact.

[0020] According to another exemplary embodiment of the present invention, a radial flange and a first snap groove are formed on the drive shaft, the first snap groove being disposed at one end of the drive shaft, and the contactor movable contact assembly further includes a first snap ring snapped into the first snap groove and abutting a top surface of the insulating body, and a first spring compressed between a bottom surface of the insulating body and the radial flange of the drive shaft.

[0021] According to another exemplary embodiment of the present invention, the movable contact assembly further includes a first washer supported on the radial flange of the drive shaft and a second washer pressed against the bottom surface of the insulating body, and two ends of the first spring abut against the first washer and the second washer, respectively.

[0022] According to another exemplary embodiment of the present invention, the first spring is received in an internal cavity surrounded by the second inner peripheral wall of the insulating member.

[0023] According to another aspect of the present invention, there is provided a movable contact device for a contactor, the movable contact device including the movable contact assembly described above, a magnetic core, a magnetically conductive plate disposed above the magnetic core, a second spring compressed between the magnetically conductive plate and the magnetic core, and a second snap ring snapped onto the other end of a drive shaft and abutting against a bottom surface of the magnetic core. The drive shaft passes through the magnetic core, the magnetically conductive plate, and the second spring, and a second snap groove for snapping the second snap ring is formed in the other end of the drive shaft.

[0024] According to an exemplary embodiment of the present invention, the movable contact device further includes an insulation mounting piece mounted on an upper surface of the magnetically conductive plate and an auxiliary switch mounted on the insulation mounting piece, wherein when the movable contact moves to a closed position in which it makes electrical contact with the stationary contact, the auxiliary switch pressing portion of the insulation member presses a trigger portion of the auxiliary switch to trigger the auxiliary switch, and when the movable contact moves to an open position in which it is electrically separated from the stationary contact, the auxiliary switch pressing portion of the insulation member separates from the auxiliary switch to release the auxiliary switch and return it to its initial state.

[0025] According to another exemplary embodiment of the present invention, the insulating mounting part comprises a base plate mounted on an upper surface of the magnetically conductive plate and a bracket connected to the base plate, the movable contact device of the contactor further comprises a circuit board fixed to the bracket, and the auxiliary switch is mounted on the circuit board.

[0026] According to another aspect of the present invention, there is provided a contactor comprising a housing, the above-described movable contact device installed in the housing, a coil disposed in the housing, and a stationary contact disposed in the housing. A magnetic core is housed in the coil and is movable relative to the housing, and a magnetically conductive plate is fixed to the housing. When the coil is energized, the drive shaft drives the movable contact to a closed position in electrical contact with the stationary contact under the action of an electromagnetic force generated by the coil, and when the coil is de-energized, the drive shaft drives the movable contact to an open position in electrical isolation from the stationary contact under the return force of a second spring.

[0027] In the above-described exemplary embodiments of the present invention, the insulating member is provided with a peripheral wall for electrical isolation, which increases the creepage distance between the drive shaft and the movable contact, improving the electrical insulation performance and safety of the contactor.

[0028] In the above-described exemplary embodiment of the present invention, the auxiliary switch pressing portion is formed on the insulating member so that the auxiliary switch pressing portion and the movable contact move synchronously. When the movable contact and the stationary contact melt, the auxiliary switch pressing portion does not move with the drive shaft, ensuring that the auxiliary switch is still in a triggered state. Therefore, it is possible to determine whether the movable contact has a fusion defect based on the state of the auxiliary switch, thereby improving the safety of the contactor.

[0029] The above and other features of the present invention will become more apparent from the detailed description of illustrative embodiments thereof, which proceeds with reference to the accompanying drawings. [Brief explanation of the drawings]

[0030] [Figure 1] 1 is an illustrative perspective view of a contactor movable contact module according to an exemplary embodiment of the present invention, as viewed from the front side; FIG. [Figure 2]1 is an illustrative perspective view of a contactor movable contact module according to an exemplary embodiment of the present invention, as viewed from the rear; FIG. [Figure 3] 1 is a cross-sectional view of a contactor movable contact module according to an exemplary embodiment of the present invention. [Figure 4] 1 is an illustrative perspective view of a contactor movable contact assembly according to an exemplary embodiment of the present invention, as viewed from the front side; FIG. [Figure 5] 1 is a cross-sectional view of a contactor movable contact assembly according to an exemplary embodiment of the present invention. [Figure 6] 1 is an illustrative perspective view of a contactor movable contact device according to an exemplary embodiment of the present invention, as viewed from the front side; [Figure 7] 1 is a cross-sectional view of a contactor movable contact device according to an exemplary embodiment of the present invention. [Figure 8] 1 is an illustrative perspective view of a contactor movable contact device according to an exemplary embodiment of the present invention, as viewed from the rear; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0031] Exemplary embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. In the drawings, like reference numerals refer to like elements. However, the present disclosure may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the disclosure to those skilled in the art.

[0032] In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form to simplify the drawings.

[0033] According to a general aspect of the present invention, there is provided a contactor movable contact module comprising an insulating member having an insulating object and a through hole penetrating the insulating object, and a movable contact having a fixed portion fixed to the insulating object and an exposed portion exposed from the insulating object, the fixed portion of the movable contact being enclosed in the insulating object so that the movable contact is electrically isolated from a drive shaft passing through the through hole, and the insulating member further includes a peripheral wall protruding from the insulating object and surrounding an opening of the through hole to increase the creepage distance between the drive shaft passing through the through hole and the exposed portion of the movable contact.

[0034] According to another general aspect of the present invention, there is provided a movable contact assembly for a contactor, the movable contact assembly including the contactor movable contact module described above and a drive shaft passing through a through hole in the insulating member, the drive shaft being resiliently connected to the contactor movable contact module for driving the movable contact to move between a closed position in electrical contact with the stationary contact and an open position in electrical isolation from the stationary contact.

[0035] According to another general aspect of the present invention, there is provided a movable contact device for a contactor, the movable contact device including the movable contact assembly described above, a magnetic core, a magnetically conductive plate disposed above the magnetic core, a second spring compressed between the magnetically conductive plate and the magnetic core, and a second snap ring snapped onto the other end of a drive shaft and abutting against the bottom surface of the magnetic core. The drive shaft passes through the magnetic core, the magnetically conductive plate, and the second spring, and a second snap groove is formed in the other end of the drive shaft for snapping the second snap ring into place.

[0036] According to another general aspect of the present invention, there is provided a contactor comprising a housing, the above-described movable contact device mounted in the housing, a coil disposed in the housing, and a stationary contact disposed in the housing. A magnetic core is housed in the coil and is movable relative to the housing, and a magnetically conductive plate is fixed to the housing. When the coil is energized, the drive shaft drives the movable contact to a closed position in electrical contact with the stationary contact under the action of an electromagnetic force generated by the coil, and when the coil is de-energized, the drive shaft drives the movable contact to an open position in electrical isolation from the stationary contact under the restoring force of a second spring.

[0037] Figure 1 shows an illustrative perspective view of a contactor movable contact module 10 according to an exemplary embodiment of the present invention, as viewed from the front. Figure 2 shows an illustrative perspective view of a contactor movable contact module 10 according to an exemplary embodiment of the present invention, as viewed from the rear. Figure 3 shows a cross-sectional view of a contactor movable contact module 10 according to an exemplary embodiment of the present invention.

[0038] As shown in FIGS. 1 to 3 , in the illustrated embodiment, the contactor movable contact module 10 includes a movable contact 11 and an insulating member 12. The insulating member 12 includes an insulating object 120 and a through-hole 102 extending through the insulating object 120. The movable contact 11 includes a fixed portion 110 fixed to the insulating object 120 and an exposed portion 111 exposed from the insulating object 120. The fixed portion 110 of the movable contact 11 is enclosed by the insulating object 120 so that the movable contact 11 is electrically isolated from a drive shaft 13 (see FIGS. 4 and 5 ) passing through the through-hole 102. The insulating member 12 also includes peripheral walls 121, 122, and 124 protruding from the insulating object 120 and surrounding the opening of the through-hole 102 to increase the creepage distance between the drive shaft 13 passing through the through-hole 102 and the exposed portion 111 of the movable contact 11.

[0039] 1-3 , in the illustrated embodiment, the insulating object 120 has a top surface and a bottom surface that are opposite to each other in the thickness direction of the insulating object 120. The peripheral walls 121, 122, and 124 include a first peripheral wall 121 and a second peripheral wall 122, 124. The first peripheral wall 121 protrudes from the top surface of the insulating object 120 and surrounds the upper opening of the through-hole 102. The second peripheral walls 122, 124 protrude from the bottom surface of the insulating object 120 and surround the bottom opening of the through-hole 102.

[0040] 1 to 3, in the illustrated embodiment, the insulating body 120 has a left side and a right side that are opposite in the longitudinal direction thereof, and two ends 111 of the movable contact 11 are exposed from the left and right sides of the insulating body 120, respectively.

[0041] 1 to 3, in the illustrated embodiment, the insulating member 12 also includes a plurality of isolation walls 123 protruding from the upper surface of the insulating body 120, and the isolation walls 123 are disposed on both radial sides of the through hole 102. The isolation walls 123 extend along the width and thickness directions of the insulating body 120 to further increase the creepage distance between the drive shaft 13 passing through the through hole 102 and the exposed end 111 of the movable contact 11.

[0042] 1 to 3 , in the illustrated embodiment, the isolation wall 123 is disposed in an internal cavity surrounded by the first peripheral wall 121 and is separated from the first peripheral wall 121 in the radial direction of the through hole 102. The insulating member 12 also includes a connecting wall 123a connected between the isolation wall 123 and the first peripheral wall 121.

[0043] 1 to 3 , in the illustrated embodiment, insulating object 120 has a front side and a rear side that are opposite in the width direction thereof, and an opening that opens toward the front side of insulating object 120 is formed in first peripheral wall 121. Insulating member 12 also includes at least a pair of side walls 125 that extend along the thickness and width directions of insulating object 120 and are connected to both sides of the opening in first peripheral wall 121 in order to further increase the creepage distance between drive shaft 13 passing through through hole 102 and exposed end 111 of movable contact 11.

[0044] As shown in FIGS. 1-3, in the illustrated embodiment, the side wall 125 extends from the first perimeter wall 121 to the bottom surface of the insulating body 120 and is connected to the front side of the insulating body 120.

[0045] 1 to 3 , in the illustrated embodiment, the second peripheral walls 122 and 124 include a second inner peripheral wall 124 and a second outer peripheral wall 122. The second inner peripheral wall 124 protrudes from the bottom surface of the insulating body 120 and surrounds the bottom opening of the through hole 102. The second outer peripheral wall 122 protrudes from the bottom surface of the insulating body 120 and surrounds the second inner peripheral wall 124. The second outer peripheral wall 122 and the second inner peripheral wall 124 are spaced apart in the radial direction of the through hole 102 and extend along the circumferential and axial directions of the through hole 102 to increase the creepage distance between the drive shaft 13 passing through the through hole 102 and the exposed end 111 of the movable contact 11.

[0046] As shown in FIGS. 1 to 3, in the exemplary embodiment, the extension height of the second inner peripheral wall 124 in the axial direction of the through-hole 102 is greater than the extension height of the second outer peripheral wall 122 in the axial direction of the through-hole 102.

[0047] 1 to 3, in the exemplary embodiment, the second inner peripheral wall 124 extends continuously along the circumferential direction of the through hole 102, i.e., the second inner peripheral wall 124 is a continuous peripheral wall without any openings. An opening that opens toward the front side of the insulating object 120 is formed in the second outer peripheral wall 122. However, the present invention is not limited to the exemplary embodiment, and the second outer peripheral wall 122 may be a continuous peripheral wall without any openings.

[0048] As shown in FIGS. 1 to 3 , in the illustrated embodiment, the insulating member 12 also includes an auxiliary switch pressing portion 126 for triggering the auxiliary switch 60 such that the auxiliary switch pressing portion 126 moves in synchronization with the movable contact 11.

[0049] As shown in Figures 1 to 3, in the illustrated embodiment, the insulating member 12 and the movable contact 11 are formed as a single injection-molded piece, with the movable contact 11 being an insert piece and the insulating member 12 being an injection-molded part, so that the insulating member 12 and the movable contact 11 are directly joined to each other.

[0050] Figure 4 shows an illustrative perspective view of a contactor movable contact assembly according to an exemplary embodiment of the present invention, as viewed from the front side. Figure 5 shows a cross-sectional view of a contactor movable contact assembly according to an exemplary embodiment of the present invention.

[0051] 1-5, in the illustrated embodiment, the contactor movable contact assembly includes the above-described contactor movable contact module 10 and a drive shaft 13. The drive shaft 13 passes through a through hole 102 in the insulating member 12. The drive shaft 13 is resiliently connected to the contactor movable contact module 10 for driving the movable contact 11 to move between a closed position in electrical contact with a stationary contact (not shown) and an open position in electrical isolation from the stationary contact.

[0052] 1-5 , in the illustrated embodiment, a radial flange 13a and a first snap groove 13c are formed on the drive shaft 13, and the first snap groove 13c is disposed at one end 133 of the drive shaft 13. The contactor movable contact assembly further includes a first snap ring 134 and a first spring 135. The first snap ring 134 snaps into the first snap groove 13c and abuts against the top surface of the insulating body 120. The first spring 135 is compressed between the bottom surface of the insulating body 120 and the radial flange 13a of the drive shaft 13.

[0053] 1 to 5, in the illustrated embodiment, the contactor movable contact assembly further includes a first washer 131 and a second washer 132. The first washer 131 is supported on the radial flange 13a of the drive shaft 13. The second washer 132 contacts the bottom surface of the insulating body 120. Two ends of the first spring 135 abut against the first washer 131 and the second washer 132, respectively.

[0054] 1 to 5, in the illustrated embodiment, the first spring 135 is housed in an internal cavity surrounded by the second inner circumferential wall 124 of the insulating member 12 to circumferentially position the first spring 135. The first spring 135 is used to provide contact pressure to the movable contact 11 to ensure reliable electrical contact between the movable contact 11 and the stationary contact.

[0055] Figure 6 shows an illustrative perspective view of a contactor movable contact device according to an exemplary embodiment of the present invention when viewed from the front, Figure 7 shows a cross-sectional view of a contactor movable contact device according to an exemplary embodiment of the present invention, and Figure 8 shows an illustrative perspective view of a contactor movable contact device according to an exemplary embodiment of the present invention when viewed from the rear.

[0056] 1 to 8 , in the illustrated embodiment, the contactor movable contact device includes the above-described contactor movable contact assembly, a magnetic core 30, a magnetically conductive plate 40, a second spring 138, and a second snap ring 137. The magnetically conductive plate 40 is disposed above the magnetic core 30. The second spring 138 is compressed between the magnetically conductive plate 40 and the magnetic core 30. The second snap ring 137 is snapped onto the other end of the drive shaft 13 and abuts against the bottom surface of the magnetic core 30. The drive shaft 13 passes through the magnetic core 30, the magnetically conductive plate 40, and the second spring 138. A second snap groove 13b for holding the second snap ring 137 is formed in the other end 136 of the drive shaft 13.

[0057] 1 to 8 , in the illustrated embodiment, the contactor movable contact device further includes an insulating mounting part 50 and an auxiliary switch 60. The insulating mounting part 50 is mounted on the upper surface of the magnetically conductive plate 40. The auxiliary switch 60 is mounted on the insulating mounting part 50. When the movable contact 11 moves to a closed position in which it makes electrical contact with the stationary contact, the auxiliary switch pressing part 126 of the insulating member 12 presses the trigger part 61 of the auxiliary switch 60 to trigger the auxiliary switch 60, thereby switching the auxiliary switch 60 to a triggered state. When the movable contact 11 moves to an open position in which it is electrically separated from the stationary contact, the auxiliary switch pressing part 126 of the insulating member 12 separates from the auxiliary switch 60 to release the auxiliary switch 60, and the auxiliary switch 60 returns to its initial state.

[0058] 1 to 8 , in the illustrated embodiment, the insulating mounting part 50 includes a base plate 51 and a bracket 52. The base plate 51 is mounted on an upper surface of the magnetically conductive plate 40. The bracket 52 is connected to the base plate 51. The contactor movable contact device further includes a circuit board 70 fixed to the bracket 52, and the auxiliary switch 60 is mounted on the circuit board 70.

[0059] As shown in FIGS. 1 to 8 , an exemplary embodiment of the present invention also discloses a contactor. The contactor includes a housing (not shown), the aforementioned contactor movable contact device, a coil (not shown), and a stationary contact (not shown). The contactor movable contact device is mounted in the housing. The coil and stationary contact are fixedly disposed in the housing. A magnetic core 30 is housed in the coil and is movable relative to the housing, and a magnetically conductive plate 40 is fixed to the housing. When the coil is energized, the drive shaft 13 drives the movable contact 11 to a closed position in electrical contact with the stationary contact under the action of an electromagnetic force generated by the coil. When the coil is de-energized, the drive shaft 13 drives the movable contact 11 to an open position in electrical isolation from the stationary contact under the restoring force of a second spring 138.

[0060] It should be understood by those skilled in the art that the above embodiments are illustrative and not restrictive. For example, those skilled in the art can make many modifications to the above embodiments without any contradiction in structure or principle, and can freely combine various features described in different embodiments with each other.

[0061] While several exemplary embodiments have been shown and described, it will be apparent to those skilled in the art that various changes or modifications can be made to these embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the following claims and their equivalents.

[0062] As used herein, elements described in the singular and preceded by the word "a" or "an" should be understood as not excluding a plural of said elements or steps, unless such exclusion is expressly stated. Furthermore, references to "one embodiment" of the invention are not intended to be interpreted as excluding the existence of additional embodiments that also incorporate the recited features. Furthermore, unless expressly stated otherwise, embodiments "comprising" or "having" an element or elements having a particular characteristic may include additional such elements that do not have that characteristic.

Claims

1. A movable contact module of a contactor, comprising: an insulating member (12) comprising an insulating body (120) and a through hole (102) passing through said insulating body (120); a movable contact (11) having a fixed portion (110) fixed to the insulating body (120) and an exposed portion (111) exposed from the insulating body (120); Equipped with The fixed portion (110) of the movable contact (11) is enclosed in the insulating material (120) so that the movable contact (11) is electrically isolated from a drive shaft (13) passing through the through hole (102); The insulating member (12) further includes peripheral walls (121, 122, 124) protruding from the insulating body (120) and surrounding the opening of the through hole (102) in order to increase the creepage distance between the drive shaft (13) passing through the through hole (102) and the exposed portion of the movable contact (11); The insulating body (120) has top and bottom surfaces that are opposite in a thickness direction; The peripheral walls (121, 122, 124) are a first peripheral wall (121) protruding from the upper surface of the insulating body (120) and surrounding an upper opening of the through hole (102); a second peripheral wall (122, 124) protruding from the bottom surface of the insulating body (120) and surrounding the bottom opening of the through hole (102); The insulating body (120) has opposite left and right sides in its longitudinal direction; two exposed ends (111) of the movable contact (11) are exposed from the left and right sides of the insulating body (120), respectively; The insulating member (12) further includes a plurality of partition walls (123) protruding from the upper surface of the insulating body (120), the plurality of partition walls (123) being arranged on both radial sides of the through hole (102); The isolation wall (123) extends along the width and thickness directions of the insulating body (120) to further increase the creepage distance between the drive shaft (13) passing through the through hole (102) and the exposed end (111) of the movable contact (11). Contactor moving contact module.

2. A movable contact module of a contactor, comprising: an insulating member (12) comprising an insulating body (120) and a through hole (102) passing through said insulating body (120); a movable contact (11) having a fixed portion (110) fixed to the insulating body (120) and an exposed portion (111) exposed from the insulating body (120); Equipped with The fixed portion (110) of the movable contact (11) is enclosed in the insulating material (120) so that the movable contact (11) is electrically isolated from a drive shaft (13) passing through the through hole (102); The insulating member (12) further includes peripheral walls (121, 122, 124) protruding from the insulating body (120) and surrounding the opening of the through hole (102) in order to increase the creepage distance between the drive shaft (13) passing through the through hole (102) and the exposed portion of the movable contact (11); The insulating body (120) has top and bottom surfaces that are opposite in a thickness direction; The peripheral walls (121, 122, 124) are a first peripheral wall (121) protruding from the upper surface of the insulating body (120) and surrounding an upper opening of the through hole (102); a second peripheral wall (122, 124) protruding from the bottom surface of the insulating body (120) and surrounding the bottom opening of the through hole (102); The insulating body (120) has opposite left and right sides in its longitudinal direction; two exposed ends (111) of the movable contact (11) are exposed from the left and right sides of the insulating body (120), respectively; The insulating body (120) has a front side and a rear side that are opposite in a width direction thereof, and an opening that opens toward the front side of the insulating body (120) is formed in the first peripheral wall (121); The insulating member (12) further includes at least a pair of side walls (125) connected to both sides of the opening of the first peripheral wall (121), and the side walls (125) extend along the thickness and width directions of the insulating body (120) to further increase the creepage distance between the drive shaft (13) passing through the through hole (102) and the exposed end (111) of the movable contact (11). Contactor moving contact module.

3. A movable contact module of a contactor, comprising: an insulating member (12) comprising an insulating body (120) and a through hole (102) passing through said insulating body (120); a movable contact (11) having a fixed portion (110) fixed to the insulating body (120) and an exposed portion (111) exposed from the insulating body (120); Equipped with The fixed portion (110) of the movable contact (11) is enclosed in the insulating material (120) so that the movable contact (11) is electrically isolated from a drive shaft (13) passing through the through hole (102); The insulating member (12) further includes peripheral walls (121, 122, 124) protruding from the insulating body (120) and surrounding the opening of the through hole (102) in order to increase the creepage distance between the drive shaft (13) passing through the through hole (102) and the exposed portion of the movable contact (11); The insulating body (120) has top and bottom surfaces that are opposite in a thickness direction; The peripheral walls (121, 122, 124) are a first peripheral wall (121) protruding from the upper surface of the insulating body (120) and surrounding an upper opening of the through hole (102); a second peripheral wall (122, 124) protruding from the bottom surface of the insulating body (120) and surrounding the bottom opening of the through hole (102); The insulating body (120) has opposite left and right sides in its longitudinal direction; two exposed ends (111) of the movable contact (11) are exposed from the left and right sides of the insulating body (120), respectively; The second peripheral wall (122, 124) a second inner peripheral wall (124) projecting from the bottom surface of the insulating body (120) and surrounding the bottom opening of the through hole (102); a second outer peripheral wall (122) projecting from the bottom surface of the insulating body (120) and surrounding the second inner peripheral wall (124); Equipped with the second outer peripheral wall (122) and the second inner peripheral wall (124) are spaced apart in the radial direction of the through hole (102) and extend along the circumferential and axial directions of the through hole (102) to increase the creepage distance between the drive shaft (13) passing through the through hole (102) and the exposed end (111) of the movable contact (11); Contactor moving contact module.

4. The insulating member (12) further includes a plurality of partition walls (123) protruding from the upper surface of the insulating body (120), the plurality of partition walls (123) being arranged on both radial sides of the through hole (102); The isolation wall (123) extends along the width and thickness directions of the insulating body (120) to further increase the creepage distance between the drive shaft (13) passing through the through hole (102) and the exposed end (111) of the movable contact (11).

4. The contactor movable contact module according to claim 2 or 3.

5. The isolation wall (123) is disposed in an internal cavity surrounded by the first peripheral wall (121) and is separated from the first peripheral wall (121) in the radial direction of the through hole (102). The contactor movable contact module of claim 1 .

6. The insulating body (120) has a front side and a rear side that are opposite in a width direction thereof, and an opening that opens toward the front side of the insulating body (120) is formed in the first peripheral wall (121); The insulating member (12) further includes at least a pair of side walls (125) connected to both sides of the opening of the first peripheral wall (121), and the side walls (125) extend along the thickness and width directions of the insulating body (120) to further increase the creepage distance between the drive shaft (13) passing through the through hole (102) and the exposed end (111) of the movable contact (11). The contactor movable contact module according to claim 1 or 3.

7. The side wall (125) extends from the first peripheral wall (121) to the bottom surface of the insulating body (120) and is connected to the front side of the insulating body (120). The contactor movable contact module of claim 2 .

8. The second peripheral wall (122, 124) a second inner peripheral wall (124) projecting from the bottom surface of the insulating body (120) and surrounding the bottom opening of the through hole (102); a second outer peripheral wall (122) projecting from the bottom surface of the insulating body (120) and surrounding the second inner peripheral wall (124); Equipped with the second outer peripheral wall (122) and the second inner peripheral wall (124) are spaced apart in the radial direction of the through hole (102) and extend along the circumferential and axial directions of the through hole (102) to increase the creepage distance between the drive shaft (13) passing through the through hole (102) and the exposed end (111) of the movable contact (11); 3. The contactor movable contact module according to claim 1 or 2.

9. an extension height of the second inner peripheral wall (124) in the axial direction of the through hole (102) is equal to or unequal to an extension height of the second outer peripheral wall (122) in the axial direction of the through hole (102); The contactor movable contact module of claim 3 .

10. The second inner peripheral wall (124) extends continuously along the circumferential direction of the through hole (102), and the second outer peripheral wall (122) has an opening that opens toward the front side of the insulating body (120), or the second outer peripheral wall (122) is a continuous peripheral wall without any opening. The contactor movable contact module of claim 3 .

11. The insulating member (12) further includes an auxiliary switch pressing portion (126) for triggering the auxiliary switch (60); The auxiliary switch pressing portion (126) moves in synchronization with the movable contact (11). A contactor movable contact module according to any one of claims 1 to 3.

12. The insulating member (12) and the movable contact (11) are formed as a single injection-molded piece so that the insulating member (12) and the movable contact (11) are directly joined to each other. The contactor movable contact module of claim 11.

13. 1. A movable contact assembly for a contactor, comprising: - the contactor movable contact module (10) according to any one of claims 1 to 3; - a drive shaft (13) passing through a through hole (102) in said insulating member (12); Equipped with The drive shaft (13) is resiliently connected to the contactor movable contact module (10) for driving the movable contact (11) to move between a closed position in electrical contact with a stationary contact and an open position in electrical isolation from the stationary contact. Movable contact assembly.

14. a radial flange (13a) and a first snap groove (13c) are formed on the drive shaft (13), the first snap groove (13c) being located at one end (133) of the drive shaft (13); A movable contact assembly for the contactor comprising: a first snap ring (134) snapped into said first snap groove (13c) and abutting against the upper surface of said insulating body (120); a first spring (135) compressed between the bottom surface of the insulating body (120) and the radial flange (13a) of the drive shaft (13); Further provided with The movable contact assembly of claim 13.

15. a first washer (131) supported on the radial flange (13a) of the drive shaft (13); a second washer (132) pressed against the bottom surface of the insulating body (120); Furthermore, The two ends of the first spring (135) abut against the first washer (131) and the second washer (132), respectively. The movable contact assembly of claim 14.

16. The first spring (135) is received in an internal cavity surrounded by a second inner peripheral wall (124) of the insulating member (12). The movable contact assembly of claim 15.

17. 1. A movable contact device for a contactor, comprising: - the movable contact assembly according to claim 13; a magnetic core (30), - a magnetically conductive plate (40) arranged above said magnetic core (30); a second spring (138) compressed between the magnetically conductive plate (40) and the magnetic core (30); a second snap ring (137) snapped onto the other end of the drive shaft (13) and abutting the bottom surface of the core (30); Equipped with The drive shaft (13) passes through the magnetic core (30), the magnetic conductive plate (40), and the second spring (138), and a second snap groove (13b) for snapping the second snap ring (137) is formed on the other end (136) of the drive shaft (13). Movable contact device.

18. - an insulating mounting element (50) mounted on the upper surface of the magnetically conductive plate (40); - an auxiliary switch (60) mounted on the insulating mounting part (50); Furthermore, When the movable contact (11) moves to a closed position where it electrically contacts the stationary contact, the auxiliary switch pressing portion (126) of the insulating member (12) presses the trigger portion (61) of the auxiliary switch (60) to trigger the auxiliary switch (60); When the movable contact (11) moves to an open position where it is electrically separated from the stationary contact, the auxiliary switch pressing portion (126) of the insulating member (12) separates from the auxiliary switch (60) to release the auxiliary switch (60) and return the auxiliary switch (60) to its initial state. The movable contact device of claim 17.

19. The insulating mounting part (50) is - a base plate (51) attached to the top surface of the magnetically conductive plate (40); a bracket (52) connected to said base plate (51); Equipped with The movable contact device of the contactor further comprises a circuit board (70) fixed to the bracket (52), and the auxiliary switch (60) is mounted on the circuit board (70). The movable contact device of claim 18.

20. A contactor comprising: - Housing and - the movable contact device according to claim 17 mounted on the housing; a coil disposed in the housing; - a stationary contact disposed in said housing; Equipped with the magnetic core (30) is housed in the coil and is movable relative to the housing, and the magnetic conductive plate (40) is fixed to the housing; When the coil is energized, the drive shaft (13) drives the movable contact (11) to a closed position in electrical contact with the stationary contact under the action of an electromagnetic force generated by the coil; When the coil is de-energized, the drive shaft (13) drives the movable contact (11) under the restoring force of the second spring (138) to an open position in which it is electrically isolated from the stationary contact. contactor.

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