Moving contact and rotary switch

Abstract

The utility model discloses a moving contact and a rotary switch, and the moving contact comprises two clamping structures and a conductive plate. The clamping structure comprises a first elastic part and a second elastic part, and the first elastic part and the second elastic part are arranged at an interval to form a clamping part; the clamping part comprises a matching area and an assembling area, the matching area is used for clamping the static contact, and the two ends of the conductive plate are located in the assembling area and fixed to the first elastic part and the second elastic part; the thickness of the conductive plate is greater than the thicknesses of the first elastic part and the second elastic part, and the conductive plate and the two clamping structures are conductive; a first imaginary connection area between the two matching areas and a second imaginary connection area between the two assembling areas intersect, and the imaginary rotation center of the moving contact is located in an intersection area of the first imaginary connection area and the second imaginary connection area; the conductive cable has the advantage of being excellent in conductive performance.

Description

Technical Field

[0001] The utility model relates to a power converter, which belongs to a rotary switch, in particular to a moving contact of a rotary switch. Background Art

[0002] A rotary isolating switch often uses the rotation of a moving contact disc to cause the two moving contact pieces on the moving contact disc to clamp or separate the two sets of static contacts at the same time, thereby realizing the connection and disconnection of the rotary switch.

[0003] Therefore, to ensure the elasticity of the movable contact to clamp the stationary contact, the movable contact must not be made too thick. If it is too thick, it will cause problems with the fit between the movable contact and the stationary contact. As a result, the conductivity of this movable contact structure is relatively weak, which will limit the performance of the switch. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to overcome the deficiencies in the prior art and to provide a moving contact and a rotary switch.

[0005] The utility model provides: a moving contact, which includes two clamping structures and a conductive plate; the clamping structure includes a first elastic part and a second elastic part, and the first elastic part and the second elastic part are arranged at intervals to form a clamping part; the clamping part includes a matching area and an assembly area, the matching area is used to clamp the static contact, and the two ends of the conductive plate are located in the assembly area and fixed to the first elastic part and the second elastic part; the thickness of the conductive plate is greater than the thickness of the first elastic part and the second elastic part, and the conductive plate and the two clamping structures are conductive; the first imaginary connection area between the two matching areas and the second imaginary connection area of the two assembly areas intersect, and the imaginary rotation center of the moving contact is located in the intersection area of the two.

[0006] In some embodiments of the present application, the two clamping structures are formed by two movable contact pieces, the two first elastic portions are at two ends of one of the movable contact pieces, and the two second elastic portions are at two ends of the other movable contact piece.

[0007] In some embodiments of the present application, the two clamping structures are formed by a movable contact piece, all the first elastic parts and the second elastic parts belong to the same movable contact piece, the movable contact piece also includes a connecting part and two bending parts, the first elastic part and the second elastic part are connected through the bending part to form the clamping part, the two first elastic parts are connected through the connecting part or the two second elastic parts are connected through the connecting part.

[0008] In some embodiments of the present application, the clamping structure further includes a bending portion, and the first elastic portion and the second elastic portion are connected to each other through the bending portion to form the clamping portion. The two clamping structures are independently formed, and the two clamping structures conduct electricity through the conductive plate.

[0009] In some embodiments of the present application, when the first elastic portion and the second elastic portion are connected via a bent portion to form the clamping portion, the bent portion is close to a side surface of the conductive plate away from the mating area.

[0010] In some embodiments of the present application, when the two clamping structures are formed by one or two moving contact pieces, a first through hole is provided on the middle part of the moving contact piece and the middle part of the conductive plate, and the imaginary rotation center of the moving contact is located in the first through hole.

[0011] In some embodiments of the present application, when the two clamping structures are formed by one movable contact piece or two movable contact pieces, the middle part of the movable contact piece and the middle part of the conductive plate are both linear structures, and the middle part of the movable contact piece and the middle part of the conductive plate are both closed.

[0012] In some embodiments of the present application, the first elastic part and the second elastic part both include a first arm plate and a second arm plate, the fitting area is formed by the two first arm plates, and the assembly area is formed by the two second arm plates; the first arm plate includes a connecting end and a movable end, the connecting end is connected to the second arm plate and the connection is an obtuse angle or an arc.

[0013] In some embodiments of the present application, the conductive performance of the conductive plate is not weaker than the conductive performance of the first elastic part and the second elastic part.

[0014] In some embodiments of the present application, the conductive plate and the first elastic portion and the second elastic portion are fixed by welding, riveting, screw fastening, interference fit, or snap-fitting.

[0015] A rotary switch comprises at least two layers of switch units and an operating unit; wherein the switch unit comprises a static contact and a moving contact disc, on which the moving contact is disposed; the moving contact disc is arranged to rotate, and the rotation of the moving contact disc causes the static contact to enter and exit a mating area, thereby completing the connection and disconnection of the switch unit.

[0016] In some embodiments of the present application, an arc extinguishing structure is provided in the switch unit, which is used to extinguish the arc generated when the moving and static contacts are disconnected; the two ends of the conductive plate extend beyond the assembly area to form an arc striking portion, which is used to introduce the arc generated when the moving and static contacts are disconnected into the arc extinguishing structure.

[0017] In some embodiments of the present application, a cross-sectional area of the portion of the conductive plate in the assembly area is larger than a cross-sectional area of the arc striking portion.

[0018] This application has the following beneficial effects:

[0019] By setting a conductive plate with a thickness greater than that of the first elastic part and the second elastic part, and utilizing the electrical conductivity between the conductive plate and the two clamping structures, the current carrying capacity (also known as the conductive performance) can be greatly improved, making the electrical performance of the moving contact more superior.

[0020] At the same time, the clamping part formed by the first elastic part and the second elastic part is divided into a mating area and an assembly area, and there is an angle between the mating area and the assembly area in the circumferential direction (that is, the first imaginary connection area between the two mating areas and the second imaginary connection area between the two assembly areas intersect and the rotation center of the moving contact is within the intersection area of the two). Even if the conductive plate is fixed in the assembly area, such a structure will not affect the clamping force of the first elastic part and the second elastic part on the static contact, because the clamping of the static contact mainly relies on the mating area. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of a rotary switch according to an embodiment of the present invention is shown;

[0023] Figure 2 A schematic diagram of the structure of a switch unit of a rotary switch in an embodiment of the present utility model is shown;

[0024] Figure 3 A schematic diagram showing an implementation of a moving contact in an embodiment of the present utility model is shown;

[0025] Figure 4 An exploded view of an implementation of a moving contact in an embodiment of the present utility model is shown;

[0026] Figure 5 A schematic diagram of a moving contact piece in one embodiment of a moving contact in an embodiment of the present utility model is shown;

[0027] Figure 6 A cross-sectional view of an embodiment of the movable contact in the present utility model is shown;

[0028] Figure 7 An exploded view of another embodiment of the movable contact in the embodiment of the present utility model is shown;

[0029] Figure 8 A schematic diagram showing another embodiment of the movable contact in the embodiment of the present utility model is shown;

[0030] Figure 9 A schematic diagram of the embodiment of the utility model in which the movable contact conductive plate is fastened with screws is shown;

[0031] Figure 10 A schematic diagram showing the embodiment of the utility model in which the movable contact conductive plate is fixed by clamping;

[0032] Figure 11 It shows a structural diagram of a moving contact piece in one embodiment of a moving contact in an embodiment of the present utility model;

[0033] Figure 12 A schematic diagram showing another embodiment of the movable contact in the embodiment of the present utility model is shown. DETAILED DESCRIPTION

[0034] The following describes in detail embodiments of the present invention. Examples of these embodiments are illustrated in the accompanying drawings, wherein identical or similar reference numerals throughout represent identical or similar elements or elements having identical or similar functions. The embodiments described below with reference to the accompanying drawings are illustrative and intended solely to explain the present invention and are not to be construed as limiting the present invention.

[0035] In the description of the present invention, 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, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0037] In this utility model, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0038] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature. Example

[0039] like Figure 1-12 As shown, the embodiment of the present invention is a rotary switch 102. The rotary switch 102 includes an operating unit 103 and a switch unit 104. The operating unit 103 is used to drive the switch unit 104 so that the switch unit 104 can be connected and disconnected.

[0040] The number of switch units 104 is generally greater than two layers. Each switch unit 104 has a fixed contact 105 and a movable contact disc 106, with a movable contact on the movable contact disc 106. Two fixed contacts 105 are selected and distributed next to the movable contact disc 106. The movable contact disc 106 is rotatable. Therefore, under the action of the operating unit 103, the movable contact disc 106 can rotate, allowing the fixed contact 105 to enter and exit the mating area 204a, completing the connection and disconnection of the switch unit 104.

[0041] An arc extinguishing structure 107 is provided on the disconnecting path of the moving and static contacts 105 and 106. The arc extinguishing structure 107 is an arc extinguishing grid assembly, which can extinguish the arc generated when the moving and static contacts 106 and 105 are separated.

[0042] The moving contact includes two clamping structures 200 , each of which includes a first elastic portion 201 and a second elastic portion 202 .

[0043] The first elastic portion 201 and the second elastic portion 202 are spaced apart to form a clamping portion 204 , wherein the clamping portion 204 includes a mating region 204 a and an assembly region 204 b . The mating region 204 a is used to clamp the static contact 105 , and the assembly region 204 b is used to fix the conductive plate 203 .

[0044] Here, the fixing methods of the conductive plate 203 are various. Figure 3-8 For example, the conductive plate 203 is fixed to the first elastic part 201 and the second elastic part 202 by riveting (rivet 208). Figure 9 For example, the conductive plate 203 is fixed to the first elastic part 201 and the second elastic part 202 by means of screws 205. The conductive plate 203 can also be fixed to the first elastic part 201 and the second elastic part 202 by means of interference fit (the thickness of the conductive plate 203 is slightly larger than the thickness of the assembly area 204b, and is inserted into the assembly area to form an interference fit). Figure 10 For example, the conductive plate 203 can also be fixed to the first elastic part 201 and the second elastic part 202 in a snap-fit manner. Since there are many snap-fitting forms, in addition to the snap-fitting method shown in the figure, other snap-fitting methods can also be used.

[0045] Here, both ends of the conductive plate 203 extend beyond the assembly region 204b to form arc-starting portions 203a. The arc-starting portions 203a extend away from the mating region 204a. The arc-starting portions 203a are intended to guide the arc during disconnection into the arc-extinguishing structure 107. The cross-sectional area (first area S1) of the portion of the conductive plate 203 within the assembly region 204b is larger than the cross-sectional area (second area S1) of the arc-starting portions 203a, thereby ensuring the stability of the conductive plate 203 to the greatest extent possible.

[0046] Here, both the first elastic portion 201 and the second elastic portion 202 include a first arm plate 2023 and a second arm plate 2032. In other words, the mating region 204a is formed by separating the two first arm plates 2023, while the assembly region 204b is formed by separating the two second arm plates 2032. Here, the first arm plates 2023 and the second arm plates 2032 are connected. The first arm plate 2023 includes a connecting end 2023a and a movable end 2023b. The connecting end 2023a is connected to the second arm plate 2032, while the movable end 2023b extends toward one side. The connecting end 2023a here is connected to the second arm plate 2032 and the connection is at an obtuse angle. Such an obtuse angle makes the connecting end 2023a to the movable end 2023b gradually bend toward the imaginary rotation center O of the moving contact. In this way, the matching area 204a and the assembly area 204b form an angle A in the circumferential direction S (it can also be understood here that the connection area between the two matching areas 204a is the first imaginary connection area S100, and the connection area between the two assembly areas 204b is the second imaginary connection area S200. The first imaginary connection area S100 and the second imaginary connection area S200 intersect, and the imaginary rotation center O of the moving contact is in the intersection area S150 of the two). Figure 5 This bending tendency is to better adapt to the rotation of the moving contact and facilitate the formation of a match with the static contact 105. Of course, in addition to the structure of the obtuse angle, an arc connection method can also be used.

[0047] The conductive plate 203 is thicker than the first elastic portion 201 and the second elastic portion 202, and its conductive performance is not weaker than the first elastic portion 201 and the second elastic portion 202. The conductive performance here can be understood as the conductive performance of the material itself.

[0048] For example, the conductive plate 203 can be made of the same material as the first and second elastic portions 201 and 202. For example, both can be made of conductive metals such as galvanized copper, copper, brass, silver, iron, gold, and corresponding known alloys. For example, the first and second elastic portions 201 and 202 can be made of copper, and the conductive plate 203 can be made of a material with better conductivity than copper.

[0049] Since the moving contact rotates around an imaginary rotation center O, the two clamping structures 200 are arranged in a centrally symmetrical manner around the imaginary rotation center O of the moving contact (that is, one clamping structure 200 rotates 180° around the imaginary rotation center O and overlaps with the other clamping structure 200).

[0050] Several specific structural structures of the clamping structure 200 are listed below:

[0051] Case 1, such as Figure 7 As shown, there are two movable contact pieces 210, spaced apart in the thickness direction. The two ends of one piece form two first elastic portions 201, while the two ends of the other piece form two second elastic portions 202. This arrangement facilitates molding and assembly.

[0052] Scenario 2: Figure 3-6 As shown, the movable contact piece 210 is a single piece, and both ends of the movable contact piece 210 are bent to form a clamping structure 200. Simply put, the movable contact piece 210 includes two first elastic portions 201, two second elastic portions 202, two bent portions 207, and a connecting portion 206. The connecting portion 206 connects the two first elastic portions 201, and the second elastic portions 202 are connected to the corresponding first elastic portions 201 via their respective bent portions 207. Of course, this structure can also be replaced with a structure in which the two second elastic portions 202 are connected via the connecting portion 206, and the two first elastic portions 201 are not directly connected, but are connected to the corresponding second elastic portions 202 via their respective bent portions 207. In this way, although the structure of a single component is more complex, the number of parts is reduced.

[0053] Case 3: The two sets of clamping structures 200 are fixed and electrically connected by the conductive plate 203, such as Figure 8 As shown, in this manner, two first elastic parts 201 and a second elastic part 202 are provided at both ends of the length direction of the conductive plate 203, and each first elastic part 201 is connected to the second elastic part 202 via a bent part 207. In this manner, less material is used, which can reduce material costs.

[0054] In the above-mentioned situations 2 and 3, the bent portion 207 is close to the side of the conductive plate 203, specifically close to the side of the conductive plate 203 away from the matching area 204a.

[0055] In the above situations 1 and 2, if Figure 4 As shown, a first through hole 211 is defined in the middle portion of the movable contact piece 210 and the middle portion of the conductive plate 203. The imaginary rotation center O of the movable contact is located within the first through hole 211. The middle portion of the movable contact piece 210 here refers to the portion connecting the two ends of the movable contact piece 210, and the middle portion of the conductive plate 203 here refers to the portion connecting the two ends of the conductive plate 203. The first through hole 211 is designed to accommodate the structure of the movable contact disc.

[0056] In the above situations 1 and 2, if Figure 12As shown, the middle portion of the movable contact piece 210 and the middle portion of the conductive plate 203 are both linear structures, and both are enclosed. The middle portion of the movable contact piece 210 here refers to the portion connecting the two ends of the movable contact piece 210, and the middle portion of the conductive plate 203 here refers to the portion connecting the two ends of the conductive plate 203. Enclosed here means that there are no through-holes on the top. This design is also designed to accommodate different types of movable contact plates.

[0057] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and integrate different embodiments or examples, and features of different embodiments or examples, as described herein, unless otherwise inconsistent.

[0058] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A moving contact, characterized in that: It includes two clamping structures and a conductive plate; the clamping structure includes a first elastic part and a second elastic part, and the first elastic part and the second elastic part are spaced apart to form a clamping part; the clamping part includes a matching area and an assembly area, the matching area is used to clamp the static contact, and the two ends of the conductive plate are located in the assembly area and fixed to the first elastic part and the second elastic part; the thickness of the conductive plate is greater than the thickness of the first elastic part and the second elastic part, and the conductive plate and the two clamping structures are conductive; the first imaginary connection area between the two matching areas and the second imaginary connection area of the two assembly areas intersect, and the imaginary rotation center of the moving contact is in the intersection area of the two.

2. A moving contact according to claim 1, characterized in that: The two clamping structures are formed by two movable contact pieces, the two first elastic parts are at the two ends of one of the movable contact pieces, and the two second elastic parts are at the two ends of the other movable contact piece; Alternatively, the two clamping structures are formed by a single movable contact piece, all the first elastic portions and the second elastic portions belong to the same movable contact piece, the movable contact piece further comprises a connecting portion and two bent portions, the first elastic portion and the second elastic portion are connected via the bent portions to form the clamping portion, the two first elastic portions are connected via the connecting portion or the two second elastic portions are connected via the connecting portion; Alternatively, the clamping structure further includes a bending portion, the first elastic portion and the second elastic portion are connected via the bending portion to form the clamping portion, the two clamping structures are formed independently, and the two clamping structures conduct electricity through the conductive plate.

3. The movable contact according to claim 2, characterized in that: When the first elastic portion and the second elastic portion are connected via the bent portion to form the clamping portion, the bent portion is close to a side surface of the conductive plate away from the matching area.

4. The movable contact according to claim 2, characterized in that: When the two clamping structures are formed by one or two movable contact pieces, a first through hole is formed on the middle portion of the movable contact piece and the middle portion of the conductive plate, and the imaginary rotation center of the movable contact is located in the first through hole; Alternatively, when the two clamping structures are formed by one or two movable contact pieces, the middle portion of the movable contact piece and the middle portion of the conductive plate are both linear structures, and the middle portion of the movable contact piece and the middle portion of the conductive plate are both closed.

5. The movable contact according to claim 1, characterized in that: The first elastic part and the second elastic part both include a first arm plate and a second arm plate. The matching area is formed by the two first arm plates, and the assembly area is formed by the two second arm plates. The first arm plate includes a connecting end and a movable end. The connecting end is connected to the second arm plate and the connection is an obtuse angle or an arc.

6. The movable contact according to claim 1, characterized in that: The conductive performance of the conductive plate is not weaker than that of the first elastic part and the second elastic part.

7. The movable contact according to claim 1, characterized in that: The conductive plate and the first elastic part and the second elastic part are fixed by welding, riveting, screw fastening, interference fit or clamping.

8. A rotary switch comprising at least two layers of switch units and an operating unit; characterized in that: The switch unit comprises a static contact and a moving contact disc, and the moving contact disc is provided with a moving contact as described in any one of claims 1 to 7; the moving contact disc is arranged to rotate, and the rotation of the moving contact disc causes the static contact to enter and exit the matching area, thereby completing the connection and disconnection of the switch unit.

9. The rotary switch according to claim 8, characterized in that: The switch unit is provided with an arc extinguishing structure, which is used to extinguish the arc generated when the moving and static contacts are disconnected; the two ends of the conductive plate extend beyond the assembly area to form an arc striking portion, which is used to introduce the arc generated when the moving and static contacts are disconnected into the arc extinguishing structure.

10. The rotary switch according to claim 9, characterized in that: The cross-sectional area of the portion of the conductive plate located in the assembly area is larger than the cross-sectional area of the arc striking portion.

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