Auxiliary contact of a contactor

Abstract

The present invention provides an auxiliary contact of a contactor. The contact support is used to connect the auxiliary contact with the contactor body. The auxiliary contact includes a shell and a plurality of connecting plates arranged inside the shell. The shell is provided with an intermediate channel for the connecting plates to pass through, an upper channel and a lower channel respectively arranged at the upper and lower ends of the intermediate channel. A first side channel is provided between the intermediate channel and the upper channel; a second side channel is provided between the intermediate channel and the lower channel. The upper channel, the first side channel, and the upper through portion are connected, and the lower channel, the second side channel, and the lower through portion are connected. The connecting plate includes a first static contact plate, a second static contact plate, a third static contact plate, and a fourth static contact plate. The auxiliary contact has three states: 1NO+1NC, 2NO, and 2NC. The auxiliary contact can overcome the defect in the prior art that a set of plastic shells cannot simultaneously adapt to the combination of three contact products, which easily leads to material waste during the production process.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary contacts of contactors, and in particular to an auxiliary contact of a contactor. Background Art

[0002] Contactors are divided into AC contactors and DC contactors, which are used in power, distribution and power consumption. In a broad sense, contactors refer to electrical appliances in industrial electricity that use current flowing through a coil to generate a magnetic field to close the contacts to control the load. The side of the contactor is generally connected to a side-mounted auxiliary contact. The actuator of the contactor usually includes main contacts and auxiliary contacts. The function of the main contacts is to connect and disconnect the main circuit and control large currents, while the auxiliary contacts are in the control circuit to meet the requirements of various control methods. The side-mounted components of the auxiliary contacts are generally composed of two sets of contacts, mainly divided into three types: 1NO+1NC, 2NO, and 2NC (NO is normally open and NC is normally closed). In the existing technology, the installation positions and wiring methods of the above three different contact types are different, so different auxiliary contact housings need to be produced to adapt to different contact products, resulting in the need to open three sets of molds for the production of auxiliary contact housings. This not only increases the mold production cost, but also increases the inventory cost of the three types of housings. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that a set of plastic shells cannot adapt to the combination of three contact products at the same time, which easily leads to material waste during the production process, thereby providing an auxiliary contact of the contactor that can be simultaneously applicable to the three contact forms.

[0004] To this end, the present invention provides an auxiliary contact of a contactor, wherein the auxiliary contact is connected to the contactor body on its side, a contact support is provided inside the auxiliary contact, and the contact support is used to connect the auxiliary contact and the contactor body, and the auxiliary contact includes a shell and a plurality of connecting plates arranged inside the shell, the shell is provided with an intermediate channel for the connecting plates to pass through, an upper channel and a lower channel respectively provided at the upper and lower ends of the intermediate channel, a first side channel is provided between the intermediate channel and the upper channel; a second side channel is provided between the intermediate channel and the lower channel, and the intermediate channel includes an upper through portion for the second static contact plate to pass through and a lower through portion for the third static contact plate to pass through. The upper channel, the first side channel and the upper through portion are connected, the lower channel, the second side channel and the lower through portion are connected, the connecting plate includes a first static touch plate, a second static touch plate, a third static touch plate and a fourth static touch plate, and the auxiliary contact has three states: 1NO+1NC, 2NO and 2NC. 1NO+1NC means that the first static touch plate is located in the upper channel and the fourth static touch plate is located in the lower channel; 2NO means that the second static touch plate is located in the upper channel, the first side channel and the upper through portion, and the fourth static touch plate is located in the lower channel; 2NC means that the first static touch plate is located in the upper channel, the third static touch plate is located in the lower channel, the second side channel and the lower through portion.

[0005] Furthermore: the upper through part is connected to the lower through part, and the upper through part and the lower through part are provided with fasteners, and the fasteners include a first card block provided on the upper through part or the lower through part and a second card block provided on the other side for abutting against the second static touch plate or the third static touch plate, and the first card block and the second card block are both fixedly connected to the shell.

[0006] Further: the first card block is arranged on the upper through part, the second card block is arranged on the lower through part, the first card block has a first guide slope for guiding the third static touch plate into the lower through part, the second card block has a second guide slope for guiding the second static touch plate into the upper through part, the second static touch plate is provided with a card groove adapted to the first card block, the first static touch plate is provided with a fixing block, and the shell is provided with a fixing groove adapted to the fixing block.

[0007] Further: the contact support is a symmetrical part, having a first mounting groove and a second mounting groove symmetrically distributed in the upper and lower parts, wherein, in the 2NO state, the first static touch plate is located at the bottom of the first mounting groove, and the fourth static touch plate is located at the bottom of the second mounting groove; in the 2NC state, the first static touch plate is located at the top of the first mounting groove, and the third static touch plate is located at the top of the second mounting groove; in the 1NO+1NC state, the first static touch plate is located at the top of the first mounting groove, and the fourth static touch plate is located at the bottom of the second mounting groove.

[0008] Further: the contact support is provided with moving contacts corresponding to the first static touch plate, the second static touch plate, the third static touch plate and the fourth static touch plate. When the auxiliary contact is in the 2NO state, the moving contacts are respectively located above the second static touch plate and the fourth static touch plate; when the auxiliary contact is in the 2NC state, the moving contacts are respectively located below the first static touch plate and the third static touch plate.

[0009] Furthermore: a positioning component for positioning the contact support is provided between the shell and the auxiliary contact, the positioning component includes an elastic clip provided on one side of the shell or the contact support and a buckle groove provided on the other side and capable of matching with the elastic clip, the positioning component has a buckled state and a separated state; the buckled state is a state in which the elastic clip overcomes the extrusion force of the contact support or the shell and is buckled with the buckle groove, and the contact support is fixed, and the separated state is a state in which the elastic clip is separated from the buckle groove, and the contact support is slidable.

[0010] Furthermore: the elastic clip is arranged on the side wall of the shell, and the buckle groove is arranged at the end of the contact support opposite to the shell.

[0011] Furthermore: the elastic clip includes a swing plate, an auxiliary rod for assisting the swing plate to swing, and a buckle block arranged at the end of the swing plate. When the positioning assembly is in the buckle state, the buckle block is buckled with the buckle groove.

[0012] Furthermore: the housing is provided with a sliding groove for the contact support to slide in the vertical direction. When the positioning assembly switches from the engaged state to the separated state, the contact support slides upward or downward along the extension direction of the sliding groove.

[0013] Furthermore: a receiving groove for accommodating an elastic clip is provided on the side wall of the shell, the receiving groove is provided in the sliding groove, the auxiliary rod passes through the side wall of the receiving groove and is fixedly connected to the receiving groove, the swing plate, the auxiliary rod and the shell are integrally injection molded, and when the snap-connecting block is snapped with the snap-connecting groove, the extrusion force of the contact support on the snap-connecting block can drive the swing plate to swing clockwise or counterclockwise with the axis of the auxiliary rod as the center.

[0014] Further: the swing plate includes an upper swing plate arranged above the auxiliary rod and a lower swing plate arranged below the auxiliary rod, and the buckle block is arranged at the end of the upper swing plate away from the auxiliary rod. When the upper swing plate swings toward the end close to the contact support, the lower swing plate swings toward the end away from the contact support.

[0015] The technical solution of the present invention has the following advantages:

[0016] 1. The auxiliary contact of a contactor provided by the present invention can effectively install a first static contact plate, a second static contact plate, a third static contact plate, and a fourth static contact plate through the arrangement of an intermediate channel, an upper channel and a lower channel arranged at the upper and lower ends of the intermediate channel, and a first side channel and a second side channel arranged on the side, thereby being able to simultaneously adapt to the three states of the auxiliary contact: 1NO+1NC, 2NO, and 2NC. In the prior art, in order to adapt to the three states of 1NO+1NC, 2NO, and 2NC, the manufacturer needs to provide three or more auxiliary contact housings or contact supports, which requires the development of multiple molds, not only leading to an increase in production costs but also easily causing waste of materials. However, by adopting the contact support housing of the patent of the present invention, the 2NO and 2NC products share a channel provided on the housing, and the 2NO and 2NC functions are achieved through different combinations of moving contacts.

[0017] 2. The auxiliary contact of a contactor provided by the present invention has a first clamping block and a second clamping block. When the second static touch plate is installed, the clamping groove on the second static touch plate can be clamped on the first clamping block, and the second clamping block can support the second static touch plate to prevent the static touch plate from displacement. Similarly, when the third static touch plate is installed, the third static touch plate is clamped with the second clamping block, and the first clamping block can contact the third static touch plate to prevent the third static touch plate from displacement.

[0018] 3. The auxiliary contact of the contactor provided by the present invention has a symmetrical contact support. That is, the contact support in the 2NO state can be rotated 180 degrees to become the contact support in the 2NC state. In this way, the 2NO and 2NC products share a contact support assembly; the 1NO+1NC product can be assembled without distinguishing the direction, thereby effectively reducing the types of contact supports and component materials, and reducing production costs.

[0019] 4. The present invention provides an auxiliary contact of a contactor, and the positioning assembly includes an elastic clip and a buckle groove compatible with the elastic clip. During installation, when the elastic clip is buckled with the buckle groove, the contact support is in a fixed state. In the prior art, the fixation of the contact support requires the use of a positioning spring. However, different positioning springs are prone to different spring force values ​​due to different manufacturing processes and processing batches, which can easily affect the changes in contact parameters and affect product quality. However, by adopting the setting of the elastic clip and the buckle groove, the structure of the elastic clip is simple, and the production and processing precision requirements are lower than those of the positioning spring. It can also effectively avoid the different elastic force differences of the positioning spring in the prior art, thereby improving product quality stability.

[0020] 5. The auxiliary contact of the contactor provided by the present invention can effectively fix the contact support in a preset position through the arrangement of the sliding groove and the contact support, the buckling block and the buckling groove, thereby facilitating subsequent assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 Schematic diagram of the connection structure between the contactor body and the auxiliary contact;

[0023] Figure 2 This is a connection diagram of 1NO+1NC in the auxiliary contact;

[0024] Figure 3 This is a schematic diagram of the 2NC connection in the auxiliary contact;

[0025] Figure 4 This is a connection diagram of the 2NO type in the auxiliary contact;

[0026] Figure 5 A position relationship diagram of the distribution of the first card block and the second card block;

[0027] Figure 6 A diagram showing the positional relationship of the second static touch panel being mounted on the upper through portion;

[0028] Figure 7 Another positional relationship diagram of the second static touch panel being mounted on the upper through portion;

[0029] Figure 8 A diagram showing the positional relationship of the third static touch panel being mounted on the lower through portion;

[0030] Figure 9 It is a schematic diagram of the cross-sectional structure between the contactor body and the auxiliary contact;

[0031] Figure 10 for Figure 9 Enlarged view of part A in the middle;

[0032] Figure 11 Schematic diagram of the overall structure of the auxiliary contact;

[0033] Figure 12 Figure 11 Enlarged view of part B in the middle.

[0034] Description of reference numerals:

[0035] 1. Auxiliary contact; 2. Contactor body; 3. Contact support; 301. First mounting slot; 302. Second mounting slot; 31. Moving contact; 4. Housing; 41. Middle channel; 411. Upper through-portion; 412. Lower through-portion; 42. Upper channel; 43. Lower channel; 44. First side channel; 45. Second side channel; 5. Connecting plate; 51. First stationary contact plate; 511. Fixing block; 512. Fixing slot; 52. Second static touch plate; 521, card slot; 53, third static touch plate; 54, fourth static touch plate; 6, fastening member; 61, first clamping block; 62, second clamping block; 63, first guide slope; 64, second guide slope; 7, positioning assembly; 71, elastic fastening member; 711, swing plate; 712, auxiliary rod; 713, fastening block; 72, buckle slot; 8, sliding slot; 81, accommodating slot; 9, upper swing plate; 91, lower swing plate. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0039] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Example

[0041] This embodiment provides an auxiliary contact of a contactor, wherein the auxiliary contact 1 is connected to the contactor body 2 at its side, and a contact support 3 is provided inside the auxiliary contact 1. The contact support 3 is used to connect the auxiliary contact 1 and the contactor body 2. The auxiliary contact 1 includes a shell 4 and a plurality of connecting plates 5 provided inside the shell 4. The shell 4 is provided with an intermediate channel 41 for the connecting plates 5 to pass through, an upper channel 42 and a lower channel 43 respectively provided at the upper and lower ends of the intermediate channel 41, a first side channel 44 is provided between the intermediate channel 41 and the upper channel 42; a second side channel 45 is provided between the intermediate channel 41 and the lower channel 43, the intermediate channel 41 includes an upper through portion 411 for the second static contact plate 52 to pass through, and a lower through portion 412 for the third static contact plate 53 to pass through, the upper channel 42 , the first side channel 44 and the upper through portion 411 are connected, the lower channel 43, the second side channel 45 and the lower through portion 412 are connected, the connecting plate 5 includes a first static contact plate 51, a second static contact plate 52, a third static contact plate 53 and a fourth static contact plate 54, and the auxiliary contact 1 has three states: 1NO+1NC, 2NO and 2NC. 1NO+1NC means that the first static contact plate 51 is located in the upper channel 42 and the fourth static contact plate 54 is located in the lower channel 43; 2NO means that the second static contact plate 52 is located in the upper channel 42, the first side channel 44 and the upper through portion 411, and the fourth static contact plate 54 is located in the lower channel 43; 2NC means that the first static contact plate 51 is located in the upper channel 42, the third static contact plate 53 is located in the lower channel 43, the second side channel 45 and the lower through portion 412.

[0042] The above specific improvements are: Figures 1-4 As shown, the auxiliary contact 1 is arranged on the side of the contactor body 2, and the auxiliary contact 1 has three states: 1NO+1NC (one normally open + one normally closed), 2NO (two normally open), and 2NC (two normally closed). When the auxiliary contact 1 is in the 1NO+1NC state, the first static contact plate 51 is located in the upper channel 42, and the fourth static contact plate 54 is located in the lower channel 43; when the auxiliary contact 1 is in the 2NO state, the second static contact plate 52 is located in the upper channel 42, the first side channel 44 and the upper through portion 411, and the fourth static contact plate 54 is located in the lower channel 43; when the auxiliary contact 1 is in the 2NC state, the first static contact plate 51 is located in the upper channel 42, the third static contact plate 53 is located in the lower channel 43, the second side channel 45 and the lower through portion 412. This is superior to the existing technology. Even if the installation positions and wiring methods of the contacts of the above three different contact forms are different, the housing 4 can be used simultaneously, thereby greatly reducing the production cost of the mold and also reducing the inventory cost of the housing 4.

[0043] On the basis of the above embodiment: the upper through portion 411 is connected to the lower through portion 412, and a fastener 6 is provided on the upper through portion 411 and the lower through portion 412. The fastener 6 includes a first clamping block 61 provided on the upper through portion 411 or the lower through portion 412 and a second clamping block 62 provided on the other side for abutting against the second static touch plate 52 or the third static touch plate 53. The first clamping block 61 and the second clamping block 62 are both fixedly connected to the housing 4.

[0044] The above specific improvements are: Figure 4-Figure 8 As shown, the upper through portion 411 is connected to the lower through portion 412, and a fastener 6 is provided on the upper through portion 411 and the lower through portion 412. The fastener 6 includes a first clamping block 61 and a second clamping block 62. When the second static touch plate 52 is installed, the second static touch plate 52 contacts the first clamping block 61 to achieve preliminary fixation, and at the same time, the second clamping block 62 can abut the second static touch plate 52, so that the second static touch plate 52 is fixed for a second time, thereby preventing the second static touch plate 52 from being displaced during collision or transportation, thereby affecting the quality of the entire product. Similarly, when the third static touch plate 53 is installed, the third static touch plate 53 contacts the second clamping block 62 to achieve preliminary fixation, and at the same time, the first clamping block 61 can abut the third static touch plate 53, thereby fixing the third static touch plate 53 for a second time, thereby effectively preventing the third static touch plate 53 from being displaced during collision or transportation, thereby affecting the quality of the entire product. By providing the first clamping block 61 and the second clamping block 62, the second static touch plate 52 or the third static touch plate 53 can be effectively fixed.

[0045] On the basis of the above embodiment: the first clamping block 61 is arranged on the upper through portion 411, and the second clamping block 62 is arranged on the lower through portion 412. The first clamping block 61 has a first guide inclined surface 63 for guiding the third static touch plate 53 into the lower through portion 412, and the second clamping block 62 has a second guide inclined surface 64 for guiding the second static touch plate 52 into the upper through portion 411. The second static touch plate 52 is provided with a clamping groove 521 adapted to the first clamping block 61, the first static touch plate 51 is provided with a fixing block 511, and the housing 4 is provided with a fixing groove 512 adapted to the fixing block 511.

[0046] The above specific improvements are: Figure 6 and Figure 7As shown, the first clamping block 61 is provided with a first guiding inclined surface 63, and the second clamping block 62 is provided with a second guiding inclined surface 64. When the second static touch plate 52 is installed, the clamping groove 521 on the second static touch plate 52 is engaged with the first clamping block 61, and the second guiding inclined surface 64 on the second clamping block 62 can assist the second static touch plate 52 to be clamped into the upper through portion 411; similarly, when the third static touch plate 53 is installed, the first guiding inclined surface 63 on the first clamping block 61 can assist the third static touch plate 53 to be clamped into the lower through portion 412. Therefore, by the provision of the first guiding inclined surface 63 and the second guiding inclined surface 64, the second static touch plate 52 and the third static touch plate 53 can be effectively clamped into the upper through portion 411 or the lower through portion 412, and by the provision of the fixing block 511 and the fixing groove 512, the position of the first static touch plate 51 can be effectively fixed.

[0047] On the basis of the above embodiment: the contact support 3 is a symmetrical part, having a first mounting groove 301 and a second mounting groove 302 symmetrically distributed in the upper and lower parts. In the 2NO state, the first static touch plate 51 is located at the bottom of the first mounting groove 301, and the fourth static touch plate 54 is located at the bottom of the second mounting groove 302. In the 2NC state, the first static touch plate 51 is located at the top of the first mounting groove 301, and the third static touch plate 53 is located at the top of the second mounting groove 302. In the 1NO+1NC state, the first static touch plate 51 is located at the top of the first mounting groove 301, and the fourth static touch plate 54 is located at the bottom of the second mounting groove 302.

[0048] The above specific improvements are: Figure 2-Figure 4 As shown in the figure, the contact support 3 is a symmetrical part. The 2NO and 2NC products share one contact support 3 component. The 1NO+1NC product can be assembled without distinguishing the direction, which effectively reduces the types of contact support 3 and component materials, reducing production costs.

[0049] On the basis of the above embodiment: the contact support 3 is provided with a moving contact 31 corresponding to the first static touch plate 51, the second static touch plate 52, the third static touch plate 53 and the fourth static touch plate 54. When the auxiliary contact 1 is in the 2NO state, the moving contact 31 is respectively located above the second static touch plate 52 and the fourth static touch plate 54; when the auxiliary contact 1 is in the 2NC state, the moving contact 31 is respectively located below the first static touch plate 51 and the third static touch plate 53.

[0050] On the basis of the above embodiment: a positioning component 7 for positioning the contact support 3 is provided between the shell 4 and the auxiliary contact 1, the positioning component 7 includes an elastic clip 71 provided on one side of the shell 4 or the contact support 3 and a buckle groove 72 provided on the other side and capable of adapting to the elastic clip 71, the positioning component 7 has a buckled state and a separated state; the buckled state is a state in which the elastic clip 71 overcomes the extrusion force of the contact support 3 or the shell 4 and buckles with the buckle groove 72, and the contact support 3 is fixed, and the separated state is a state in which the elastic clip 71 is separated from the buckle groove 72, and the contact support 3 is slidable.

[0051] On the basis of the above embodiment: the elastic clamping member 71 is provided on the side wall of the housing 4 , and the buckle groove 72 is provided at the end of the contact support 3 opposite to the housing 4 .

[0052] The above specific improvements are: Figure 9 and Figure 10 As shown, the auxiliary contact 1 is hung on the side of the contactor body 2, and the auxiliary contact 1 has a contact support 3 inside. During the installation of the contact support 3 and the auxiliary contact 1, the elastic clip 71 can be snapped into the snap groove 72 first (at this time the positioning component 7 is in the snapped state), and the contact support 3 is preliminarily positioned so that the contact support 3 is positioned at the preset position, and then the auxiliary contact 1 is snapped into the side of the contactor body 2. At this time, the positioning component 7 will be transformed from the snapped state to the separated state, and the contact support 3 can slide freely. The existing technology needs to use positioning elasticity to position the contact support 3 at the preset position, so that the contact support 3 can be fixed at the preset position without the need for a positioning spring, which is not only convenient for assembly, but also can effectively avoid changes in the parameters of the contact support 3 due to differences in the positioning spring force.

[0053] Based on the above embodiment: the elastic clamping member 71 includes a swing plate 711, an auxiliary rod 712 for assisting the swing plate 711 to swing, and a buckling block 713 arranged at the end of the swing plate 711. When the positioning assembly 7 is in the buckling state, the buckling block 713 is buckled with the buckling groove 72.

[0054] The above specific improvements are: Figure 11-12 As shown, the elastic snap-fit ​​member 71 includes a swing plate 711 and an auxiliary rod 712. The auxiliary rod 712 is fixedly connected to the housing 4, but is injection-molded integrally with the swing plate 711. When the contact support 3 moves to a position where the snap-fit ​​block 713 and the snap-fit ​​groove 72 can snap into each other, it is the preset position of the contact support 3, and then the auxiliary contact 1 can be connected to the contactor body 2.

[0055] On the basis of the above embodiment: the housing 4 is provided with a sliding groove 8 for the contact support 3 to slide in the vertical direction. When the positioning assembly 7 switches from the engaged state to the separated state, the contact support 3 slides upward or downward along the extension direction of the sliding groove 8.

[0056] The above-mentioned specific improvements are as follows: by setting the sliding groove 8, the sliding track of the contact support 3 can be effectively limited, and in the prior art, the auxiliary contact 1 is generally composed of two contacts, which are divided into three forms: 1NO+1NC, 2NO, and 2NC. In the prior art, different contact combinations require different contact supports 3 and positioning springs. However, in this embodiment, it is no longer necessary to use a positioning spring to position the contact support 3. Instead, a snap-on block 713 and a snap-on groove 72 are used, and the contact support 3 components of the three contact combination types are in the same relative position in the product, thereby ensuring that the NC overtravel and NO opening distance design values ​​are the same under the three contact conditions. In this way, one contact support 3 can simultaneously support the realization of three contact product combinations, effectively reducing the types of contact supports 3 and component materials, and 2NO and 2NC products can share one contact support 3 component (only the contact support 3 component needs to be rotated 180° and installed); 1NO+1NC products do not need to distinguish between directions during assembly (that is, there is no need to look at the front and back).

[0057] On the basis of the above embodiment: a receiving groove 81 for accommodating an elastic clip 71 is provided on the side wall of the shell 4, the receiving groove 81 is provided in the sliding groove 8, the auxiliary rod 712 passes through the side wall of the receiving groove 81 and is fixedly connected to the receiving groove 81, the swing plate 711, the auxiliary rod 712 and the shell 4 are integrally injection molded, and when the snap-connecting block 713 is snapped with the snap-connecting groove 72, the extrusion force of the contact support 3 to the snap-connecting block 713 can drive the swing plate 711 to swing clockwise or counterclockwise with the axis of the auxiliary rod 712 as the center.

[0058] The above-mentioned specific improvements are as follows: a receiving groove 81 for accommodating an elastic clip 71 is provided on the side wall of the shell 4. Through the setting of the receiving groove 81, the swing plate 711 can swing freely in the receiving groove 81, which facilitates the snap connection of the snap block 713 and the snap connection groove 72. During the installation process of the contact support 3 and the auxiliary contact 1, the elastic clip 71 can be snapped into the snap connection groove 72 first (at this time the positioning assembly 7 is in a snap connection state), and the contact support 3 can be preliminarily positioned so that the contact support 3 is positioned at a preset position, and then the auxiliary contact 1 is snapped into the side of the contactor body 2. At this time, the elastic clip 71 will use its own elastic torsional force to make the snap connection block 713 fall out of the snap connection groove 72.

[0059] Based on the above embodiment: the swing plate 711 includes an upper swing plate 9 arranged above the auxiliary rod 712 and a lower swing plate 91 arranged below the auxiliary rod 712, and the buckle block 713 is arranged at the end of the upper swing plate 9 away from the auxiliary rod 712. When the upper swing plate 9 swings toward the end close to the contact support 3, the lower swing plate 91 swings toward the end away from the contact support 3.

[0060] The above specific improvement is: the lower swing plate 91 is arranged to extend outside the shell 4. When the auxiliary contact 1 is assembled with the contactor body 2, the contactor will squeeze the lower swing plate 91, thereby separating the upper swing plate 9 from the contact support 3.

[0061] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An auxiliary contact of a contactor, wherein the auxiliary contact (1) is connected to a contactor body (2) at its side, a contact support (3) is provided in the auxiliary contact (1), and the contact support (3) is used to connect the auxiliary contact (1) and the contactor body (2), characterized in that: The auxiliary contact (1) comprises a housing (4) and a plurality of connecting plates (5) arranged inside the housing (4); the housing (4) is provided with an intermediate channel (41) for the connecting plates (5) to pass through, an upper channel (42) and a lower channel (43) respectively arranged at the upper and lower ends of the intermediate channel (41); a first side channel (44) is provided between the intermediate channel (41) and the upper channel (42); a second side channel (45) is provided between the intermediate channel (41) and the lower channel (43); the intermediate channel (41) comprises an upper through portion (411) for the second static contact plate (52) to pass through and a lower through portion (412) for the third static contact plate (53) to pass through; the upper channel (42), the first side channel (44) and the upper through portion (411) are in communication; the lower channel (43) and the second side channel (45) are in communication with each other. and a lower through portion (412); the connecting plate (5) comprises a first static contact plate (51), a second static contact plate (52), a third static contact plate (53) and a fourth static contact plate (54); the auxiliary contact (1) has three states: 1NO+1NC, 2NO and 2NC; 1NO+1NC is a state in which the first static contact plate (51) is located in the upper channel (42) and the fourth static contact plate (54) is located in the lower channel (43); 2NO is a state in which the second static contact plate (52) is located in the upper channel (42), the first side channel (44) and the upper through portion (411), and the fourth static contact plate (54) is located in the lower channel (43); and 2NC is a state in which the first static contact plate (51) is located in the upper channel (42), the third static contact plate (53) is located in the lower channel (43), the second side channel (45) and the lower through portion (412).

2. The auxiliary contact of a contactor according to claim 1, characterized in that: The upper through portion (411) is communicated with the lower through portion (412), and a fastening member (6) is provided on the upper through portion (411) and the lower through portion (412). The fastening member (6) comprises a first clamping block (61) provided on the upper through portion (411) or the lower through portion (412), and a second clamping block (62) provided on the other side for abutting against the second static contact plate (52) or the third static contact plate (53). The first clamping block (61) and the second clamping block (62) are both fixedly connected to the housing (4).

3. The auxiliary contact of a contactor according to claim 2, characterized in that: The first clamping block (61) is arranged on the upper through portion (411), and the second clamping block (62) is arranged on the lower through portion (412). The first clamping block (61) has a first guiding inclined surface (63) for guiding the third static touch plate (53) to enter the lower through portion (412), and the second clamping block (62) has a second guiding inclined surface (64) for guiding the second static touch plate (52) to enter the upper through portion (411). The second static touch plate (52) is provided with a clamping groove (521) adapted to the first clamping block (61), the first static touch plate (51) is provided with a fixing block (511), and the housing (4) is provided with a fixing groove (512) adapted to the fixing block (511).

4. The auxiliary contact of a contactor according to claim 1, characterized in that: The contact support (3) is a symmetrical part having a first mounting groove (301) and a second mounting groove (302) symmetrically distributed in the upper and lower parts, wherein, in the 2NO state, the first static touch plate (51) is located at the bottom of the first mounting groove (301), and the fourth static touch plate (54) is located at the bottom of the second mounting groove (302); in the 2NC state, the first static touch plate (51) is located at the top of the first mounting groove (301), and the third static touch plate (53) is located at the top of the second mounting groove (302); in the 1NO+1NC state, the first static touch plate (51) is located at the top of the first mounting groove (301), and the fourth static touch plate (54) is located at the bottom of the second mounting groove (302).

5. The auxiliary contact of a contactor according to claim 4, characterized in that: The contact support (3) is provided with a movable contact (31) corresponding to the first static contact plate (51), the second static contact plate (52), the third static contact plate (53) and the fourth static contact plate (54); when the auxiliary contact (1) is in the 2NO state, the movable contact (31) is respectively located above the second static contact plate (52) and the fourth static contact plate (54); when the auxiliary contact (1) is in the 2NC state, the movable contact (31) is respectively located below the first static contact plate (51) and the third static contact plate (53).

6. The auxiliary contact of a contactor according to claim 5, characterized in that: A positioning assembly (7) for positioning the contact support (3) is provided between the housing (4) and the auxiliary contact (1). The positioning assembly (7) comprises an elastic clamping member (71) provided on one side of the housing (4) or the contact support (3) and a buckle groove (72) provided on the other side and capable of matching with the elastic clamping member (71). The positioning assembly (7) has a buckled state and a separated state. The buckled state is a state in which the elastic clamping member (71) overcomes the squeezing force of the contact support (3) or the housing (4) and buckles with the buckle groove (72), and the contact support (3) is fixed. The separated state is a state in which the elastic clamping member (71) is separated from the buckle groove (72), and the contact support (3) is slidable.

7. The auxiliary contact of a contactor according to claim 6, characterized in that: The elastic clamping member (71) is arranged on the side wall of the housing (4), and the buckle groove (72) is arranged at an end of the contact support (3) opposite to the housing (4).

8. The auxiliary contact of a contactor according to claim 7, characterized in that: The elastic clamping member (71) comprises a swing plate (711), an auxiliary rod (712) for assisting the swing plate (711) in swinging, and a buckling block (713) arranged at the end of the swing plate (711); when the positioning assembly (7) is in a buckling state, the buckling block (713) is buckled with the buckling groove (72).

9. The auxiliary contact of a contactor according to claim 8, characterized in that: The housing (4) is provided with a sliding groove (8) for the contact support (3) to slide along the movement direction. When the positioning assembly (7) switches from the engaged state to the separated state, the contact support (3) slides upward or downward along the extension direction of the sliding groove (8).

10. The auxiliary contact of a contactor according to claim 9, characterized in that: A receiving groove (81) for receiving the elastic clip (71) is provided on the side wall of the housing (4); the receiving groove (81) is provided in the sliding groove (8); the auxiliary rod (712) passes through the side wall of the receiving groove (81) and is fixedly connected to the receiving groove (81); the swing plate (711), the auxiliary rod (712) and the housing (4) are integrally injection molded; when the buckle block (713) is buckled with the buckle groove (72), the extrusion force of the contact support (3) on the buckle block (713) can drive the swing plate (711) to swing clockwise or counterclockwise around the axis of the auxiliary rod (712).

11. The auxiliary contact of a contactor according to claim 10, characterized in that: The swing plate (711) comprises an upper swing plate (9) arranged above the auxiliary rod (712) and a lower swing plate (91) arranged below the auxiliary rod (712); the buckle block (713) is arranged at an end of the upper swing plate (9) away from the auxiliary rod (712); when the upper swing plate (9) swings toward an end close to the contact support (3), the lower swing plate (91) swings toward an end away from the contact support (3).

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