Contact system

Abstract

The contact system comprises a moving contact assembly and a static contact group, the moving contact assembly comprises a contact support and a moving contact bridge, the two ends of the moving contact bridge are respectively provided with a moving contact part, the static contact group comprises two static contacts, each static contact comprises a static contact plate, the two ends of the static contact plate are respectively provided with a static contact part and a wiring part, and the wiring part is connected with the static contact plate. The two static contact plates are arranged on the same side of the moving contact assembly side by side, and the middle parts of the two static contact plates of the same static contact group are bent towards the same direction at least once, so that the static contact part and the wiring part of the same static contact plate respectively correspond to the two adjacent sides of the moving contact assembly. According to the utility model, the two static contacts are arranged at the same side of the moving contact assembly side by side, and the two ends of each static contact are respectively corresponding to the two adjacent sides of the moving contact assembly through bending, so that the static contacts and the moving contact assembly are matched compactly, and the overall size of the contact system is reduced.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a contact system. Background Art

[0002] A switch device is a device that controls the on and off of a circuit. A switch device is usually equipped with one or more contact units. The contact system of each contact unit includes a moving contact assembly and a stationary contact group. The existing contact system has the following defects: First, the two stationary contacts in the stationary contact group are located at opposite ends of the moving contact assembly, and their structure is dispersed, which is not conducive to shortening the length of the moving contact bridge, making the overall volume of the contact system larger; second, the contact support is usually an integrated structure, which is not conducive to disassembly and assembly of the moving contact bridge. Summary of the Invention

[0003] The purpose of the present utility model is to overcome at least one defect of the prior art and provide a contact system with a compact structure.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a contact system, including a moving contact assembly and a static contact group, the moving contact assembly includes a contact support and a moving contact bridge, the two ends of the moving contact bridge are respectively provided with a moving contact portion, the static contact group includes two static contacts, each static contact includes a static contact plate, the two ends of the static contact plate are respectively provided with a static contact portion and a wiring portion, the two static contact plates are arranged side by side on the same side of the moving contact assembly, the middle parts of the two static contact plates of the same static contact group are bent at least once in the same direction, so that the static contact portion and the wiring portion of the same static contact plate respectively correspond to the adjacent two sides of the moving contact assembly.

[0006] Preferably, the contact support includes a bearing part and a covering part that cover each other, and an accommodating cavity is formed between the bearing part and the covering part. The moving contact bridge is arranged in the accommodating cavity, and the two ends of the moving contact bridge serve as two moving contact parts extending from both sides of the bearing part to the outside of the accommodating cavity.

[0007] Preferably, the moving contact assembly further includes a contact spring, which is assembled in the accommodating cavity, with one end of the contact spring abutting against the accommodating cavity and the other end of the contact spring abutting against a side of the moving contact bridge facing away from the static contact group.

[0008] Preferably, the covering portion is provided with a protruding positioning shaft, and the positioning shaft is plugged into one end of the contact spring for positioning.

[0009] Preferably, a mutually cooperating snap-fitting structure is provided between the bearing portion and the covering portion, and the snap-fitting structure includes at least one snap-fitting slot and at least one snap-fitting buckle, and the snap-fitting buckle is snap-fitted with the snap-fitting slot accordingly.

[0010] Preferably, a sliding groove is provided on the side of the covering portion, and the edge of the bearing portion is limitedly inserted into the sliding groove.

[0011] Preferably, each moving contact portion is provided with a moving contact point, and the edge of the moving contact bridge on at least one side of each moving contact point extends outward to form a moving arc-striking portion, and the side of the moving arc-striking portion facing the static contact portion is an inclined surface, and the thickness of the moving arc-striking portion gradually decreases along the direction from the moving contact point to the edge of the moving contact bridge.

[0012] Preferably, a moving arc-striking plate is connected to the moving arc-striking portion, and the moving arc-striking plate extends obliquely along the inclined surface of the moving arc-striking portion.

[0013] Preferably, the contact support is provided with a second connection hole for linkage connection; and a reset connection portion is further provided on the outer side of the bearing portion away from the covering portion.

[0014] Preferably, the plane where the static contact portion is located is perpendicular to the plane where the wiring portion is located.

[0015] In the contact system of the present invention, two static contacts are arranged side by side on the same side of the moving contact assembly. By bending, the two ends of each static contact correspond to the adjacent two sides of the moving contact assembly, so that the static contact and the moving contact assembly are compactly matched, which is conducive to reducing the overall volume of the contact system.

[0016] In addition, the contact support is a split structure, which is convenient for disassembly and assembly of the moving contact bridge. In particular, the bearing part and the covering part are snap-connected and matched with the slide groove, which ensures the convenience of disassembly and assembly and improves the stability of the connection.

[0017] In addition, the moving contact bridge is convenient for arc striking by arranging a moving arc striking portion on the edge, and it is also convenient for assembling the moving arc striking plate.

[0018] In addition, the connection portion is formed integrally by the static contact plate, so that the static contact is L-shaped as a whole, which has the advantages of simple structure, small size and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the contact system of the utility model;

[0020] Figure 2 This is a schematic diagram of the coordination between the static contact and the moving contact bridge in the utility model;

[0021] Figure 3 It is a side view of the static contact and the moving contact bridge in the utility model;

[0022] Figure 4 This is a structural diagram of the moving contact assembly in the utility model;

[0023] Figure 5 It is a cross-sectional view of the movable contact assembly in the utility model;

[0024] Figure 6 This is an exploded schematic diagram of the moving contact assembly in the utility model;

[0025] Figure 7 This is a structural diagram of the dynamic contact bridge in the utility model;

[0026] Figure 8 This is a schematic structural diagram of the static contact in the utility model;

[0027] Reference numerals:

[0028] 21-moving contact assembly, 211-contact support, 2110-accommodating chamber, 2111-bearing part, 2112-covering part, 2113-reset connecting part, 2114-positioning shaft, 211a-clip, 211b-slot, 211c-slide, 211d-limiting platform, 212-moving contact bridge, 2121-moving contact part, 2122-moving contact, 2123-moving arc-striking part, 213-contact spring, 22-static contact, 221-static contact plate, 2211-static contact part, 2212-wiring part, 2213-connecting section, 2214-static contact, b1-second connecting hole. DETAILED DESCRIPTION

[0029] The following embodiments are given in conjunction with the accompanying drawings to further illustrate the specific implementation of the contact system of the present invention. The contact system of the present invention is not limited to the description of the following embodiments.

[0030] like Figure 1 、 3 As shown, the contact system includes a movable contact assembly 21 and a stationary contact group that cooperate with each other, wherein the movable contact assembly 21 includes a contact support 211 and a movable contact bridge 212, the movable contact bridge 212 is arranged through the accommodating cavity 2110 of the contact support 211, and the two ends of the movable contact bridge 212 are respectively provided with movable contact parts 2121, each movable contact part 2121 extends out of the accommodating cavity 2110, and the stationary contact group includes two stationary contacts 22, each stationary contact 22 includes a stationary contact plate 221, and the two ends of the stationary contact plate 221 are respectively provided with a stationary contact part 2211 and a wiring part 2212, and the two ends of the stationary contact plate 221 are respectively provided with a stationary contact part 2211 and a wiring part 2212, and each stationary contact part 2211 corresponds to and cooperates with one movable contact part 2121.

[0031] The improvement of the present application lies in that the two stationary contact plates 221 are arranged side by side on the same side of the moving contact assembly 21, and the middle portions of the two stationary contact plates 221 of the same stationary contact group are bent at least once in the same direction, so that the stationary contact portion 2211 and the wiring portion 2212 of the same stationary contact plate 221 correspond to adjacent sides of the moving contact assembly 21. In this way, the two stationary contacts 22 are arranged side by side on the same side of the moving contact assembly 21, and the two ends of each stationary contact 22 correspond to adjacent sides of the moving contact assembly 21 through bending, making the stationary contacts 22 and the moving contact assembly 21 fit compactly, which helps to reduce the overall volume of the contact system.

[0032] Further, such as Figure 4-6 As shown, the contact support 211 includes a bearing portion 2111 and a covering portion 2112 that cover each other, and an accommodating cavity 2110 is formed between the bearing portion 2111 and the covering portion 2112. The moving contact bridge 212 is arranged in the accommodating cavity 2110, and the two ends of the moving contact bridge 212 serve as two moving contact portions 2121 extending from both sides of the bearing portion 2111 to the outside of the accommodating cavity 2110. The contact support 211 adopts a split structure, which is convenient for disassembly and assembly of the moving contact bridge 212.

[0033] Preferably, the bearing part 2111 and the covering part 2112 are matched through a snap-fit ​​structure, and the snap-fit ​​structure includes at least one slot 211b and at least one buckle 211a, that is, the bearing part 2111 is provided with a buckle 211a and / or a slot 211b, and the covering part 2112 is provided with a slot 211b and / or a buckle 211a, and the buckle 211a is snap-fitted to the slot 211b. Of course, other structures that are convenient for disassembly may also be used between the bearing part 2111 and the covering part 2112, for example, screw fastening and the like.

[0034] Combine Figure 1-8 A specific embodiment of a switch device is provided.

[0035] The switch device includes a base, in the middle of which an electromagnetic system is arranged. The electromagnetic system includes a coil assembly and a moving iron core and a stationary iron core cooperated with the coil assembly. The moving iron core and the stationary iron core are spaced relative to each other to form a magnetic gap (a magnetic gap refers to a very short air distance between two magnetic materials in a magnetic circuit) for driving the moving iron core to move. The electromagnetic system can adopt existing technology.

[0036] At least one contact unit is arranged in the base, and each contact unit includes a contact system and an arc extinguishing system. The contact system includes a moving contact assembly 21 and a static contact group that cooperate with each other. The moving contact assembly 21 of each contact unit 22 is directly or indirectly driven and connected to the moving iron core 32, so that the moving contact assembly 21 is close to or away from the static contact group. The static contact assembly includes two static contacts 22, and each static contact 22 is provided with a wiring portion 2212. Each wiring portion 2212 corresponds to a wiring slot opened on the base. The arc extinguishing system 23 is arranged on one side of the contact system to extinguish the arc generated when the contact system is disconnected. The arc extinguishing system 23 can adopt existing technology.

[0037] by Figure 1 The direction of the X axis is the first direction, the direction of the Y axis is the second direction, and the direction of the Z axis is the third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0038] like Figure 1-3 As shown in Figure 8, the contact system includes a movable contact assembly 21 and a stationary contact group that cooperate with each other, wherein the movable contact assembly 21 and the stationary contact group are spaced apart in a first direction, and the movable contact assembly 21 includes a contact support 211 and a movable contact bridge 212, wherein the movable contact bridge 212 is arranged in a receiving cavity 2110 of the contact support 211 along a third direction, and the two ends of the movable contact bridge 212 respectively extend outside the contact support 211 as two movable contact portions 2121. Furthermore, a contact spring 213 is also provided in the receiving cavity 2110. The contact spring 213 is arranged on the side of the movable contact bridge 212 facing away from the stationary contact 22, and is used to provide contact pressure when the contact system is closed, that is, one end of the contact spring 213 abuts against the receiving cavity 2110, and the other end of the contact spring 213 abuts against the side of the movable contact bridge 212 facing away from the stationary contact group.

[0039] In this embodiment, the contact support 211 preferably adopts a split detachable structure to facilitate the disassembly and assembly of the moving contact bridge 212. Figure 4-6 As shown, the contact support 211 includes a bearing portion 2111 and a covering portion 2112 that cover each other. A receiving cavity 2110 is formed between the bearing portion 2111 and the covering portion 2112. The movable contact bridge 212 is disposed in the receiving cavity 2110, and the two ends of the movable contact bridge 212 serve as two movable contact portions 2121 extending from both sides of the bearing portion 2111 to the outside of the receiving cavity 2110. Figure 6In the embodiment, the bearing portion 2111 includes a pair of bearing plates arranged at intervals, one end of the pair of bearing plates is connected together to form a connecting portion, so that the bearing portion 2111 as a whole forms a U-shaped groove structure, and the other end of the pair of bearing plates is open for plugging and matching with the covering portion 2112. The two sides of the pair of bearing portions 2111 are open to form two ends of the movable contact bridge 212 extending out of the accommodating cavity 2110, and a reset connecting portion 2113 is provided on the side of the connecting portion facing away from the accommodating cavity 2110, that is, the reset connecting portion 2113 is provided on the outer side of the bearing portion 2111 away from the covering portion 2112. Figure 6 In the figure, the reset connection portion 2113 is approximately a circular protrusion, which is used to be plugged into one end of the reset member 34.

[0040] The covering portion 2112 is a block-shaped body as a whole, and a groove is provided in the middle of one side of the covering portion 2112, so that a U-shaped plug-in body is formed on the side of the covering portion 2112 facing the load-bearing portion 2111. When the covering portion 2112 covers the load-bearing portion 2111, the U-shaped plug-in body is located in the accommodating cavity 2110 and can close the open areas on both sides of a pair of load-bearing plates. The groove has a certain depth for accommodating the contact spring 213, and a positioning shaft 2114 is protruded in the middle of the bottom of the groove, and one end of the contact spring 213 is inserted and positioned on the positioning shaft 2114.

[0041] In this embodiment, a mutually cooperating snap-fitting structure is provided between the carrying portion 2111 and the covering portion 2112. The snap-fitting structure includes a snap-fitting slot 211b and a snap-fitting buckle 211a. Figure 6 In the embodiment, the card slot 211b is provided on a pair of supporting plates, and the buckle 211a is protrudingly provided on the cover portion 2112. Furthermore, a sliding groove 211c is provided on the side of the cover portion 2112. Figure 6 In the middle, a limiting platform 211d is protruding from the side of the covering part 2112, and a sliding groove 211c is opened on the limiting platform 211d. The edge of the supporting part 2111 is slidably inserted into the sliding groove 211c, that is, the edge of the supporting plate is slidably inserted into the sliding groove 211c. After the supporting part 211 and the covering part 2112 are clamped, the limiting platform 211d and the sliding groove 211c can prevent the side wall of the supporting part 2111 from deforming and falling off the clamping.

[0042] In this embodiment, the contact support 211 is provided with a second connecting hole b1, which can be linked to the electromagnetic system through the second connecting hole b1. In this embodiment, the second connecting hole b1 is respectively provided on the bearing part 2111 and the covering part 2112. When the covering part 2112 covers the bearing part 2111, the covering part 2112 corresponds to the second connecting hole b1 of the bearing part 2111. A first connecting member is provided in the second connecting hole b1. The first connecting member can be a pin shaft, thereby connecting the moving contact assembly 21 with the electromagnetic system.

[0043] like Figure 1-7As shown, the moving contact bridge 212 is a strip-shaped plate structure as a whole, and the two ends of the moving contact bridge 212 serve as moving contact parts 2121 respectively. Each moving contact part 2121 is spaced apart from the static contact part 2211 of a static contact 22, and each moving contact part 2121 is provided with a moving contact point 2122. The edge of the moving contact bridge 212 on at least one side of each moving contact point 2122 extends outward to form a moving arc-striking part 2123, and the moving arc-striking part 2123 is close to the arc extinguishing system. In this embodiment, the edges of the moving contact bridge 212 on both sides of each moving contact 2122 are It extends outward to form a moving arc-striking portion 2123, and the side of each moving arc-striking portion 2123 facing the static contact portion 2211 is an inclined surface, and the thickness of each moving arc-striking portion 2123 gradually decreases along the direction from the moving contact 2122 to the edge of the moving contact bridge 212. Furthermore, a moving arc-striking portion 2123 on each moving contact portion 2121 is connected to a moving arc-striking plate 2341, and the moving arc-striking plate 2341 can extend obliquely along the inclined surface of the moving arc-striking portion 2123, which not only facilitates the assembly of the moving arc-striking plate 2341, but also improves the arc-striking efficiency.

[0044] like Figure 1-3 As shown in FIG8 , the static contact group includes two static contacts 22 arranged side by side. When the contact system is arranged at the same end of the base, the two static contacts 22 are spaced apart in the third direction, and each static contact 22 is extended along the position near the end of the base in the second direction. In this embodiment, each static contact 22 includes a straight-plate-shaped static contact plate 221. Each static contact plate 221 has a static contact portion 2211 and a wiring portion 2212 at both ends. The static contact portion 2211 is provided with a static contact point 2214, and the wiring portion 2212 is provided with a wiring hole. The two static contact plates 221 are arranged side by side. On the same side of the moving contact assembly 21, the middle parts of the two static contact plates 221 in the same contact system are bent in the same direction at least once, that is, the two static contact plates 221 in the same static contact group are always arranged side by side, so that the static contact portion 2211 and the wiring portion 2212 of the same static contact plate 221 respectively correspond to the adjacent two sides of the moving contact assembly 21. At this time, the plane where the static contact portion 2211 is located and the plane where the wiring portion 2212 is located are arranged at an angle. Preferably, the plane where the static contact portion 2211 is located and the plane where the wiring portion 2212 is located are perpendicular to each other, so that the static contact 22 is L-shaped as a whole.

[0045] When the static contact 22 is arranged in the base, the static contact portion 2211 is arranged at a position close to the end of the base in the second direction, the static contact portion 2211 and the moving contact portion 2121 are spaced opposite to each other in the first direction, the wiring portion 2212 is arranged along the first direction, and each wiring portion 2212 is spaced opposite to the moving contact assembly 21 in the second direction, and the wiring portion 2212 corresponds to the wiring slot opened on the base. In this embodiment, one wiring portion 2212 in the same contact system is used for incoming lines, and the other wiring portion 2212 is used for outgoing lines.

[0046] Furthermore, in the second direction, at least a portion of the middle portion of the stationary contact plate 221 corresponds to the gap between the stationary contact portion 2211 and the dynamic contact portion 2121, so that the current flowing through the middle portion of the stationary contact plate 221 is in the opposite direction to the arc current generated between the dynamic contact portion 2121 and the stationary contact portion 2211. Figure 8 In the figure, the middle area of ​​the static contact plate 221 connected between the wiring portion 2212 and the static contact portion 2211 is the connecting section 2213, and the connecting section 2213 is basically arranged along the first direction. The connecting section 2213 can be bent once or more than once to make the static contact plate 221 as a whole L-shaped structure, or to make the static contact plate 221 as a whole Z-shaped; the edge of one end of the static contact portion 2211 away from the wiring portion 2212 can extend outward to form a static arc-striking portion, and the side of the static arc-striking portion facing the moving contact assembly 21 is a slope, and the inclined surface of the static arc-striking portion is also conducive to connecting the static arc-striking plate 2342.

[0047] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are conventionally placed directions or positional relationships during use. They are intended solely for ease of description and do not imply that the devices or components referred to must have a specific direction. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and description and should not be construed as indicating relative importance.

[0048] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A contact system comprising a moving contact assembly (21) and a stationary contact group, wherein the moving contact assembly (21) comprises a contact support (211) and a moving contact bridge (212), wherein both ends of the moving contact bridge (212) are respectively provided with a moving contact portion (2121), wherein the stationary contact group comprises two stationary contacts (22), wherein each stationary contact (22) comprises a stationary contact plate (221), wherein both ends of the stationary contact plate (221) are respectively provided with a stationary contact portion (2211) and a wiring portion (2212), wherein: Two static contact plates (221) are arranged side by side on the same side of the moving contact assembly (21); the middle parts of the two static contact plates (221) of the same static contact group are bent at least once in the same direction, so that the static contact portion (2211) and the wiring portion (2212) of the same static contact plate (221) respectively correspond to adjacent two sides of the moving contact assembly (21).

2. The contact system according to claim 1, wherein: The contact support (211) comprises a bearing portion (2111) and a covering portion (2112) that overlap each other, a receiving cavity (2110) being formed between the bearing portion (2111) and the covering portion (2112), the movable contact bridge (212) being arranged in the receiving cavity (2110), and two ends of the movable contact bridge (212) serving as two movable contact portions (2121) extending from both sides of the bearing portion (2111) to the outside of the receiving cavity (2110).

3. The contact system according to claim 2, characterized in that: The moving contact assembly (21) further comprises a contact spring (213), wherein the contact spring (213) is assembled in the accommodating cavity (2110), one end of the contact spring (213) abuts against the accommodating cavity (2110), and the other end of the contact spring (213) abuts against the side of the moving contact bridge (212) facing away from the static contact group.

4. The contact system according to claim 3, characterized in that: The covering portion (2112) is provided with a protruding positioning shaft (2114), and the positioning shaft (2114) is plugged into and positioned with one end of the contact spring (213).

5. The contact system according to claim 2, wherein: A mutually cooperating snap-fitting structure is provided between the bearing portion (2111) and the covering portion (2112), wherein the snap-fitting structure comprises at least one snap-fitting slot (211b) and at least one snap-fitting buckle (211a), and the snap-fitting buckle (211a) is snap-fitted to the snap-fitting slot (211b) in correspondence.

6. The contact system according to claim 2, wherein: A sliding groove (211c) is provided on the side of the covering portion (2112), and the edge of the supporting portion (2111) is limitedly inserted into the sliding groove (211c).

7. The contact system according to claim 1, wherein: Each moving contact portion (2121) is provided with a moving contact point (2122); the edge of the moving contact bridge (212) on at least one side of each moving contact point (2122) extends outward to form a moving arc-striking portion (2123); the side of the moving arc-striking portion (2123) facing the static contact portion (2211) is an inclined surface, and the thickness of the moving arc-striking portion (2123) gradually decreases along the direction from the moving contact point (2122) to the edge of the moving contact bridge (212).

8. The contact system according to claim 7, characterized in that: The movable arc-striking portion (2123) is connected to a movable arc-striking plate (2341), and the movable arc-striking plate (2341) extends obliquely along the inclined surface of the movable arc-striking portion (2123).

9. The contact system according to claim 2, characterized in that: The contact support (211) is provided with a second connection hole (b1) for linkage connection; and a reset connection portion (2113) is further provided on the outside of the bearing portion (2111) away from the covering portion (2112).

10. The contact system according to claim 1, wherein: The plane where the static contact portion (2211) is located is perpendicular to the plane where the wiring portion (2212) is located.

Images