Moving contact assembly of contactor

Abstract

The utility model discloses a moving contact assembly of a contactor, which comprises a contact support and an armature, the contact support comprises an armature mounting part and a moving contact mounting part connected with the armature mounting part, and the armature is fixed on the armature mounting part; the electromagnetic clutch further comprises a buffering pad, an armature installation groove is formed in the armature installation part, the buffering pad is arranged at the groove bottom of the armature installation groove, the back of the armature abuts against the buffering pad, and the back of the armature is completely covered with the buffering pad. The method has the characteristic that the assembly process is reduced.

Description

Technical Field

[0001] The present application relates to the electrical field of low-voltage switches, and is a moving contact assembly of a contactor. Background Art

[0002] The contactor basically sets the moving contact on a contact support, which is fixed on an armature. The principle of the electromagnet is then used to convert the movement of the armature into the movement of the moving contact, ultimately achieving contact and separation with the static contact.

[0003] The structure between the contact support and the armature of the existing AC contactor with a relatively large current specification is shown in CN205122494U (this is also a relatively classic contactor structure). A contact buffer (located in the center) and four small springs (located on the periphery) are arranged between the contact support and the armature. The armature abuts against the contact buffer and the four surrounding springs, thereby reducing the impact force on the contact support.

[0004] Although this structure has a good shock-absorbing effect, it is still relatively inconvenient for production and assembly. The reasons are: first, in terms of the number of components in the shock-absorbing structure, it is extremely wasteful from a production perspective or a stocking perspective, because two materials (contact buffer and spring) are required; second, from an installation perspective, the contact buffer may be relatively convenient to assemble, but the spring is very small as can be seen from the attached drawing, and an additional location for installing the spring is required on the contact support, which not only causes installation troubles, but also reduces the strength and insulation performance of the contact support.

[0005] In summary, it is indeed necessary to improve this buffer structure. Summary of the invention

[0006] In view of this, the purpose of the present application is to overcome the deficiencies in the prior art and to provide a moving contact assembly of a contactor.

[0007] The present application provides: a moving contact assembly of a contactor, comprising a contact support and an armature, the contact support comprising an armature mounting portion and a moving contact mounting portion connected to the armature mounting portion, the armature being fixed on the armature mounting portion; wherein, it also comprises a buffer pad, an armature mounting groove being provided on the armature mounting portion, the buffer pad being provided at the bottom of the armature mounting groove, the back of the armature being against the buffer pad, and the buffer pad completely covering the back of the armature.

[0008] Compared with the prior art, this structure uses a buffer pad to directly cover the entire back of the armature, so only one buffer pad is needed to achieve the shock absorption effect. Compared with the form of a small buffer pad plus 4 springs, this structure is extremely convenient in terms of production, material preparation, and even assembly.

[0009] In some embodiments of the present application, the number of the moving contact mounting parts is three, and all the moving contact mounting parts are arranged in sequence and at intervals along a first direction, and the first direction is the same as the length direction of the armature; contact supporting sliders are connected to both sides of the armature mounting part, and the contact supporting slider and the armature mounting part are an integrated part or the contact supporting slider and the armature mounting part are snap-fitted.

[0010] With this structure, the arrangement direction of the moving contact mounting portion is the same as the length direction of the armature, which is different from the structure of the prior art.

[0011] In some embodiments of the present application, an installation space is provided on each moving contact mounting portion, the installation space is connected to the bottom of the armature mounting slot, and the buffer pad shields all the connecting positions of the installation space and the armature mounting slot.

[0012] With this structure, the buffer pad shields all the connecting positions between the installation space and the armature installation groove, which can improve the insulation performance and prevent the arc on the moving contact from being connected to the armature.

[0013] In some embodiments of the present application, an installation space is provided on each moving contact mounting portion, a connecting channel connected to the installation space is opened on the bottom of the armature mounting groove, the buffer pad includes a main body portion and an embedded portion corresponding to the connecting channel, the embedded portion is embedded in the corresponding connecting channel, and the main body portion and the embedded portion together close all the connecting channels.

[0014] In some embodiments of the present application, a reset spring mounting hole is provided on the contact supporting slider, and the reset spring mounting hole is used to install the reset spring.

[0015] In some embodiments of the present application, a first mounting groove is opened on the groove wall of the armature mounting groove, a first mounting protrusion is provided on the buffer pad, the first mounting protrusion is located in the first mounting groove, and the buffer pad is installed to the groove bottom of the armature mounting groove along the first mounting groove through the first mounting protrusion.

[0016] With this structure, the cooperation between the first mounting protrusion and the first mounting groove will make the buffer pad be installed more smoothly and facilitate the positioning of the buffer pad.

[0017] In some embodiments of the present application, a second mounting protrusion is provided on the groove wall of the armature mounting groove, a second mounting groove is opened on the buffer pad, the second mounting protrusion cooperates with the second mounting groove, and the buffer pad is installed on the second mounting protrusion along the second mounting protrusion to the groove bottom of the armature mounting groove through the second mounting groove sleeve.

[0018] With this structure, the cooperation between the second mounting protrusion and the second mounting groove also makes the buffer pad smoother to install and facilitates the positioning of the buffer pad.

[0019] In some embodiments of the present application, a fixing plate is further included, a first through hole is opened in the width direction of the armature, and after the fixing plate passes through the first through hole, both ends are exposed on the outside of the armature; a first mounting arm and a second mounting arm are respectively connected to both sides of the armature mounting portion; a first mounting area is provided on the first mounting arm, and a second mounting area is provided on the second mounting arm, the first mounting area, the armature mounting groove and the second mounting area are connected, and the two ends of the fixing plate are respectively provided in the first mounting area and the second mounting area.

[0020] With this structure, the fixing plate, the first through hole, the first installation area, the armature installation groove and the second installation area are connected to form a solution with related features, which makes the installation of the armature very convenient.

[0021] In some embodiments of the present application, interference fit, screw fastening, snap fit, or plug fit are used between the end of the fixing plate in the first installation area and the first installation area.

[0022] The fixing plate adopts these installation methods, which all have the effect of relatively stable installation and improve the installation stability of the armature.

[0023] In some embodiments of the present application, interference fit, screw fastening, snap fit, plug fit, or abutment fit are used between the end of the fixing plate in the second installation area and the second installation area.

[0024] The fixing plate adopts these installation methods, which all have the effect of relatively stable installation and improve the installation stability of the armature.

[0025] In some embodiments of the present application, the fixing plate includes a first end, a middle portion and a second end, and the middle portion is connected to the first end and the second end through a bending structure; the thickness dimensions of the first end, the middle portion and the second end are all smaller than the height dimension of the first through hole, the middle portion is in the first through hole, and the bending structure is used to form a dimension between the middle portion and the first end that matches the height dimension of the first through hole, and the bending structure is used to form a dimension between the middle portion and the second end that matches the height dimension of the first through hole.

[0026] With this structure, firstly, the thickness of the first end, the middle part and the second end are all smaller than the height of the first through hole, so that the fixing plate can easily pass through the first through hole. Secondly, the size between the middle part and the first end is formed to match the height of the first through hole through the bending structure, so that the contact between the fixing plate and the armature is more stable, and the stability after installation is improved.

[0027] In some embodiments of the present application, an installation space is provided on the moving contact mounting part, and the installation space is provided with an opening on the upper surface of the moving contact mounting part; it also includes a frame-shaped fixing frame, a moving contact, a mounting spring and a spring leaf; the frame-shaped fixing frame includes a lower support arm, an upper support arm and two side support arms, and the upper support arm and the lower support arm are connected to each other through two side support arms to form a hollow structure; the mounting spring is in the hollow structure, and the upper end of the mounting spring abuts against the inner wall of the mounting space, and the lower end of the mounting spring abuts against the upper support arm; the upper support arm is outside the mounting space, and the spring leaf is arranged above the moving contact, and the moving contact and the spring leaf are arranged through the hollow structure; under the action of the mounting spring, the upper support arm abuts against the spring leaf, the spring leaf abuts against the upper surface of the moving contact, and the lower surface of the moving contact abuts against the upper surface of the moving contact mounting part.

[0028] With this structure, the moving contact uses such a frame-shaped fixing frame, the moving contact, the mounting spring and the spring leaf to fix the moving contact, which will make the installation of the moving contact very stable and convenient.

[0029] In some embodiments of the present application, a spring installation groove is provided on the inner wall of the installation space, and the upper end of the installation spring is abutted against the groove wall of the spring installation groove; an installation opening for installing a frame-shaped fixing frame and installing a spring is provided on the bottom of the armature installation groove, and the buffer pad blocks the installation opening.

[0030] By adopting this structure, the frame-shaped fixing frame and the installation spring can be taken in and placed through the installation opening, and the installation opening can be closed by a buffer pad to improve the insulation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 An exploded view of a moving contact assembly of a contactor according to Embodiment 1 of the present application is shown;

[0033] Figure 2 A three-dimensional diagram of a moving contact assembly of a contactor according to Embodiment 1 of the present application is shown;

[0034] Figure 3 A schematic diagram showing the structure of the contact support in the moving contact assembly of the contactor in the present application is shown;

[0035] Figure 4 A cross-sectional view of a moving contact assembly of a contactor in the present application is shown;

[0036] Figure 5 A schematic diagram of the structure of a buffer pad in a moving contact assembly of a contactor in the present application is shown;

[0037] Figure 6 The figure shows a fixing plate in the moving contact assembly of the contactor in the present application. DETAILED DESCRIPTION

[0038] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] In addition, the terms "primary" and "secondary" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "primary" and "secondary" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0041] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] In the present application, unless otherwise clearly specified and limited, the main feature being "above" or "below" the second feature may mean that the main feature is in direct contact with the second feature, or that the main feature is in indirect contact with the second feature through an intermediate medium. Moreover, the main feature being "above", "above" and "above" the second feature may mean that the main feature is directly above or obliquely above the second feature, or simply means that the main feature is higher in level than the second feature. The main feature being "below", "below" and "below" the second feature may mean that the main feature is directly below or obliquely below the second feature, or simply means that the main feature is higher in level and has a lower electrical connection with the three-phase power supply than the second feature. Example

[0043] like Figure 1-Figure 6 As shown, an embodiment of the present application provides a moving contact assembly of a contactor.

[0044] The moving contact assembly includes a contact support 100, an armature 200, a fixing plate 300, a buffer pad 400, a frame fixing frame 500, a moving contact 600, a mounting spring 700 and a spring 800. Here, because the moving contact assembly has three groups of moving contacts 600, the frame fixing frame 500, the moving contact 600, the mounting spring 700 and the spring 800 are all three. When this moving contact assembly is used in a contactor, the moving contact 600 moves with the contact support 100 and the armature 200, thereby realizing the connection and disconnection of the contactor.

[0045] The contact support 100 includes three moving contact mounting parts 101, an armature mounting part 102, a first mounting arm 103, a second mounting arm 104, and two contact support sliders 105. In this embodiment, these parts are integrated, so the contact support 100 is an integrated part. Of course, in addition to the integrated solution, the first mounting arm 103, the second mounting arm 104, and the contact support slider 105 can also be separated and then fixed to the armature mounting part 102 by a clamping method.

[0046] Here, a reset spring mounting hole 1051 is provided on the contact supporting slider 105 for mounting a reset spring.

[0047] An armature mounting groove 1021 is provided on the lower surface of the armature mounting portion 102, and three moving contact mounting portions 101 are arranged on the upper surface of the armature mounting portion 102 at intervals along a first direction (the first direction is the same as the length direction of the armature 200), and the first mounting arm 103 and the second mounting arm 104 are respectively connected to the two side surfaces of the armature mounting portion 102, and the two contact supporting sliders 105 are respectively connected to the first mounting arm 103 and the second mounting arm 104.

[0048] The installation structure of each moving contact 600 is the same, so taking one of them as an example, the corresponding moving contact installation part 101 is provided with an installation space 1011 , and the installation space 1011 has an opening 1012 on the upper surface of the moving contact installation part 101 .

[0049] The frame-shaped fixing frame 500 is a roughly rectangular frame structure, comprising a lower support arm 501, an upper support arm 502 and two side support arms 503, wherein the upper support arm 502 and the lower support arm 501 are connected via the two side support arms 503, thus forming a hollow structure 504. Here, the lower support arm 501 is composed of two separate parts, which is designed to facilitate the formation of the frame-shaped fixing frame 500.

[0050] A spring installation groove 1013 is opened on the inner wall of the installation space 1011 , and the installation spring 700 is located in the hollow structure 504 . The upper end of the installation spring 700 abuts against the spring installation groove 1013 , and the lower end of the installation spring 700 abuts against the lower bracket arm 501 .

[0051] The upper bracket arm 502 is outside the installation space 1011, that is, it extends from the opening 1012 to the outside of the installation space 1011. The moving contact 600 and the spring 800 are arranged in an overlapping manner, and the spring 800 is located above the moving contact 600. The moving contact 600 and the spring 800 pass through the hollow structure 504 together. Since the installation spring 700 abuts between the lower bracket arm 501 and the spring installation groove 1013, the upper bracket arm 502 will generate a pre-tightening force toward the spring 800. Under the action of the pre-tightening force, the upper bracket arm 502 presses the spring 800, and the spring 800 is pressed against the upper surface of the moving contact 600, and the lower surface of the moving contact 600 is pressed against the upper surface of the moving contact mounting portion 101.

[0052] In order to facilitate the installation of the spring 700 and the frame-shaped fixing frame 500, an installation opening 1014 is also opened at the bottom of the armature installation groove 1021, so that the assembly formed by the installation spring 700 and the frame-shaped fixing frame 500 can be inserted into the installation space 1011 through the installation opening 1014.

[0053] The shape of the buffer pad 400 is basically adapted to the bottom of the armature mounting groove 1021. The buffer pad 400 is located between the armature 200 and the bottom of the armature mounting groove 1021. After the armature 200 is installed, the buffer pad 400 is held between the armature 200 and the bottom of the armature mounting groove 1021. Here, the shape of the buffer pad 400 is to completely cover the back of the armature 200. It can be simply understood that the surface area of ​​the buffer pad 400 is at least the same as the surface area of ​​the back of the armature 200. In this way, a buffer pad 400 can achieve the effect of shock absorption and reduce the costs of production, material preparation, assembly, etc. Here, there are many materials for the buffer pad 400, and a flexible material such as rubber, silicone, latex, etc. is used here.

[0054] In order to facilitate the installation of the buffer pad 400, an assembly structure is also provided between the buffer pad 400 and the armature installation groove 1021. The assembly structure here includes two methods:

[0055] Method 1: a first mounting groove 1022 is provided on the groove wall of the armature mounting groove 1021, a first mounting protrusion 401 is provided on the buffer pad 400, the first mounting protrusion 401 is located in the first mounting groove 1022, and the buffer pad 400 is installed to the groove bottom of the armature mounting groove 1021 along the first mounting groove 1022 through the first mounting protrusion 401. In this embodiment, the number of the first mounting protrusion 401 and the number of the first mounting groove 1022 are both two.

[0056] In the second method, a second mounting protrusion 1023 is provided on the groove wall of the armature mounting groove 1021, and a second mounting groove 402 is provided on the buffer pad 400. The second mounting protrusion 1023 cooperates with the second mounting groove 402, and the buffer pad 400 is mounted on the second mounting protrusion 1023 through the second mounting groove 402 and is installed to the groove bottom of the armature mounting groove 1021 along the second mounting protrusion 1023. In this embodiment, the number of the second mounting protrusion 1023 and the number of the second mounting groove 402 are both four.

[0057] Although the present embodiment covers two types of assembly structures at the same time, it is not limited to containing both structures at the same time, and any one of the structures may also be used.

[0058] Here, the buffer pad 400 completely shields the connection position between all the installation spaces 1011 and the armature installation slot 1021. In this embodiment, the connection position can be understood as the installation port 1014 and the connection channel. The connection channel 1015 here is provided on the bottom of the armature installation slot 1021, and the installation port 1014 is connected to the connection channel 1015. The main body of the buffer pad 400 here is also provided with an embedded portion 403, and the embedded portion 403 is embedded in the connection channel 1015. In this way, all the connection channels 1015 can be closed by the action of the main body and the embedded portion 403. Of course, in addition to this, the connection position can also adopt a solution without a connection channel 1015, that is, only the installation port 1014 is used as the connection position. In this way, the buffer pad 400 also needs to shield the installation port 1014.

[0059] A first through hole 201 is provided in the width direction of the armature 200, a first mounting area 1031 is provided on the first mounting arm 103, and a second mounting area 1041 is provided on the second mounting arm 104. The second mounting area 1041 is provided on the second mounting arm 104, and the first mounting area 1031, the armature mounting groove 1021 and the second mounting area 1041 are connected. In this embodiment, the first mounting area 1031 and the second mounting area 1041 are both similar groove-shaped structures. After the fixing plate 300 passes through the first through hole 201, both ends are exposed outside the armature 200, and the two ends are respectively located in the first mounting area 1031 and the second mounting area 1041. In this embodiment, the fixing plate 300 is fastened between the end of the first mounting area 1031 and the first mounting area 1031 by screws, and the fixing plate 300 is abutted against the end of the second mounting area 1041 and the second mounting area 1041.

[0060] Of course, in addition to the above-mentioned method, the fixing sheet 300 and the first installation area 1031 and the second installation area 1041 can also be fixed in other ways. For example, the fixing sheet 300 and the first installation area 1031 can also be fixed by interference fit, snap fit, plug fit; for example, the fixing sheet 300 and the second installation area 1041 can also be fixed by interference fit, snap fit, plug fit, and screw fastening. Of course, the specific fixing method is related to the form of the first installation area 1031 and the second installation area 1041. For example, when the first installation area 1031 and the second installation area 1041 are both hole-shaped structures, the fixing sheet 300 can be fixed by plug-in, interference fit, etc.

[0061] The fixing sheet 300 includes a first end 301, a middle portion 302 and a second end 303, wherein the middle portion 302 is connected to the first end 301 and the second end 303 via a bending structure 304. The first end 301 corresponds to the first mounting area 1031, and the second end 303 corresponds to the second mounting area 1041. The thickness of the first end 301, the middle portion 302 and the second end 303 is smaller than the height dimension H of the first through hole 201. The middle portion 302 is located in the first through hole 201. Since the bending structure 304 is provided, the bending structure 304 forms a dimension h between the middle portion 302 and the first end 301 that matches the height dimension H of the first through hole 201, and also forms a dimension h between the middle portion 302 and the second end 303 that matches the height dimension H of the first through hole 201.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without contradiction.

[0063] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A moving contact assembly of a contactor, comprising a contact support and an armature, wherein the contact support comprises an armature mounting portion and a moving contact mounting portion connected to the armature mounting portion, and the armature is fixed on the armature mounting portion; Features: It also includes a buffer pad. The armature mounting portion is provided with an armature mounting groove. The buffer pad is arranged at the bottom of the armature mounting groove. The back of the armature abuts against the buffer pad, and the buffer pad completely covers the back of the armature.

2. The moving contact assembly of a contactor according to claim 1, Features: The number of the moving contact mounting parts is three, and all the moving contact mounting parts are arranged in sequence and at intervals along a first direction, and the first direction is the same as the length direction of the armature; both sides of the armature mounting part are connected to contact supporting sliders, and the contact supporting slider and the armature mounting part are an integrated part or the contact supporting slider and the armature mounting part are snap-fitted.

3. The moving contact assembly of a contactor according to claim 2, Features: Each movable contact mounting portion is provided with an installation space, the installation space is connected to the bottom of the armature mounting slot, and the buffer pad shields the connection position between all the installation spaces and the armature mounting slot; Alternatively, an installation space is provided on each moving contact mounting portion, a connecting channel connected to the installation space is opened on the bottom of the armature mounting groove, the buffer pad includes a main body portion and an embedded portion corresponding to the connecting channel, the embedded portion is embedded in the corresponding connecting channel, and the main body portion and the embedded portion jointly close all the connecting channels.

4. The moving contact assembly of a contactor according to claim 2, Features: The contact supporting slider is provided with a reset spring mounting hole, and the reset spring mounting hole is used for mounting the reset spring.

5. The moving contact assembly of a contactor according to claim 1, Features: A first mounting groove is provided on the groove wall of the armature mounting groove, a first mounting protrusion is provided on the buffer pad, the first mounting protrusion is located in the first mounting groove, and the buffer pad is installed to the groove bottom of the armature mounting groove along the first mounting groove through the first mounting protrusion; And / or, a second mounting protrusion is provided on the groove wall of the armature mounting groove, a second mounting groove is opened on the buffer pad, the second mounting protrusion cooperates with the second mounting groove, and the buffer pad is installed on the second mounting protrusion along the second mounting protrusion to the groove bottom of the armature mounting groove through the second mounting groove sleeve.

6. The moving contact assembly of a contactor according to claim 1, Features: It also includes a fixing plate, a first through hole is opened in the width direction of the armature, and after the fixing plate passes through the first through hole, both ends are exposed on the outside of the armature; the first mounting arm and the second mounting arm are respectively connected to the two sides of the armature mounting portion; the first mounting arm is provided with a first mounting area, and the second mounting arm is provided with a second mounting area, the first mounting area, the armature mounting groove and the second mounting area are connected, and the two ends of the fixing plate are respectively provided in the first mounting area and the second mounting area.

7. The moving contact assembly of a contactor according to claim 6, Features: The end of the fixing plate in the first installation area is connected to the first installation area by interference fit, screw fastening, snap fit or plug fit; And / or, an interference fit, screw fastening, snap fit, plug fit, or abutment fit is adopted between the end of the fixing plate in the second installation area and the second installation area.

8. The movable contact assembly of a contactor according to claim 6, Features: The fixing plate includes a first end, a middle portion and a second end, and the middle portion is connected to the first end and the second end through a bending structure; the thickness dimensions of the first end, the middle portion and the second end are all smaller than the height dimension of the first through hole, the middle portion is in the first through hole, and the bending structure is used to form a dimension between the middle portion and the first end that matches the height dimension of the first through hole, and the bending structure is used to form a dimension between the middle portion and the second end that matches the height dimension of the first through hole.

9. The movable contact assembly of a contactor according to claim 1, Features: An installation space is provided on the moving contact mounting part, and the installation space is provided with an opening on the upper surface of the moving contact mounting part; it also includes a frame-shaped fixing frame, a moving contact, a mounting spring and a spring leaf; the frame-shaped fixing frame includes a lower support arm, an upper support arm and two side support arms, and the upper support arm and the lower support arm are connected with each other through two side support arms to form a hollow structure; the installation spring is in the hollow structure, and the upper end of the installation spring abuts against the inner wall of the installation space, and the lower end of the installation spring abuts against the upper support arm; the upper support arm is outside the installation space, and the spring leaf is arranged above the moving contact, and the moving contact and the spring leaf are arranged through the hollow structure; under the action of the installation spring, the upper support arm abuts against the spring leaf, the spring leaf abuts against the upper surface of the moving contact, and the lower surface of the moving contact abuts against the upper surface of the moving contact mounting part.

10. The movable contact assembly of a contactor according to claim 9, Features: A spring installation groove is provided on the inner wall of the installation space, and the upper end of the installation spring is against the groove wall of the spring installation groove; an installation opening for installing a frame-shaped fixing frame and an installation spring is provided on the groove bottom of the armature installation groove, and the buffer pad covers the installation opening.

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