Contact structure and load switch

Abstract

The invention provides a contact structure and a load switch, and relates to the technical field of low-voltage electrical appliances, the contact structure comprises a first moving contact and a second moving contact which are oppositely arranged, and at least one end of the first moving contact and at least one end of the second moving contact form a clamping space for clamping a first static contact. The first moving contact and the second moving contact are arranged in a non-parallel manner. A clamping type contact structure is adopted, the current directions of the adjacent movable contact pieces of the clamping type contact are the same, when short-circuit current exists, mutual attraction acting force is shown, the contact can be tightly pressed, and therefore the anti-short-circuit performance of a product is improved; and the first moving contact and the second moving contact are arranged in a non-parallel manner, so that friction force during closing of the contacts can be reduced, and reliable closing and opening actions of a product are ensured.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical technology, specifically to a contact structure and a load switch. Background Technology

[0002] Currently, the contact structures in load switch designs are typically either direct-acting bridge-type or rotary-snapping contact structures. Direct-acting bridge-type contact structures have high contact resistance, while rotary-snapping contact structures have poor short-circuit withstand capability. Neither of these structures is conducive to reliable contact, and thus cannot guarantee the safety performance of the switch. Summary of the Invention

[0003] The purpose of this application is to provide a contact structure and load switch that can improve the reliable contact between the moving contact and the stationary contact, ensure the normal operation and safety performance of the switch, and also have high short-circuit resistance.

[0004] In one aspect of this application, a contact structure is provided, including a first moving contact and a second moving contact disposed opposite to each other. At least one end of the first moving contact and the second moving contact forms a clamping space for clamping a first stationary contact. The first moving contact and the second moving contact are not parallel to each other.

[0005] Optionally, the device includes a contact support, which has a first moving contact mounting groove and a second moving contact mounting groove. The first moving contact and the second moving contact are respectively disposed in the first moving contact mounting groove and the second moving contact mounting groove. The contact support is rotatably disposed within the housing.

[0006] Optionally, both the first moving contact and the second moving contact are provided with moving contacts at the ends that form the clamping space to form contact portions.

[0007] Optionally, stationary contacts are provided on opposite sides of the first stationary contact, and the stationary contacts are not arranged in parallel.

[0008] Optionally, an elastic element is also provided to provide contact pressure, the elastic element being disposed in the first moving contact mounting groove and / or the second moving contact mounting groove; The contact support is integrally formed, and at least one of the first moving contact mounting groove and the second moving contact mounting groove is a convex hole.

[0009] Optionally, the contact support is provided with a transmission part to connect with the drive system, and the drive system drives the contact support to rotate about its rotation axis through the transmission part; The transmission part is not coaxial with the rotation axis of the contact support, and the line connecting the transmission part, the rotation axis of the contact support, and the end of the moving contact used to form the clamping space forms an obtuse angle.

[0010] Optionally, it also includes a second stationary contact, which is located at the end of the first moving contact and the second moving contact away from the first stationary contact. The end of the first moving contact and the second moving contact near the second stationary contact is provided with a connecting portion for connecting a flexible connection, so as to connect the flexible connection and the second stationary contact. The connecting portion is located outside the contact support.

[0011] Optionally, the first moving contact and the second moving contact form an angle along the extension of their widths, with the angle opening towards the first stationary contact.

[0012] In another aspect of this application, a load switch is provided, including: the contact structure described above, and a drive system. The drive system includes an electromagnetic drive mechanism, which includes a coil, a yoke, and an armature assembly. The axial direction of the coil is along a second direction, and the contact structure is located on the second direction side of the electromagnetic drive mechanism.

[0013] Optionally, the drive system further includes a transmission mechanism, one end of which is connected to the armature assembly and the other end of which is connected to the contact structure. The armature assembly and the coil are arranged along a first direction, and the first stationary contact and the second stationary contact are arranged along the first direction. Along the second direction, the projection of the coil and the projection of the first stationary contact at least partially coincide. The system also includes an arc-extinguishing mechanism, with the moving contact and the arc-extinguishing mechanism arranged along the first direction.

[0014] The contact structure and load switch provided in this application adopt a clamping contact structure. The current direction of adjacent moving contacts of the clamping contact is the same. When there is a short circuit current, they exhibit a mutual attraction force, which can press the contacts together, thereby improving the short circuit resistance performance of the product. The first moving contact and the second moving contact are not arranged in parallel, which can reduce the friction when the contacts are closed and ensure reliable operation of the product when closing and opening. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is one of the schematic diagrams of the moving contact structure provided in this embodiment; Figure 2a This is the second schematic diagram of the moving contact structure provided in this embodiment; Figure 2bThis is the third schematic diagram of the moving contact structure provided in this embodiment; Figure 2c This is the fourth schematic diagram of the moving contact structure provided in this embodiment; Figure 3 This is one of the schematic diagrams of the first stationary contact structure provided in this embodiment; Figure 4 This is the second schematic diagram of the first stationary contact structure provided in this embodiment; Figure 5 This is a schematic diagram of the contact structure provided in this embodiment, showing the mating structure of the moving first stationary contact; Figure 6 This is a schematic diagram of the load switch structure provided in this embodiment.

[0017] Icons: 10-Housing; 11-Contact structure; 110-Contact support; 110a-Transmission unit; 111-First moving contact; 112-Second moving contact; 11a-Moving contact; 114a-First moving contact mounting slot; 114b-Second moving contact mounting slot; 115-First stationary contact; 115a-Stationary contact; 116-Second stationary contact; 12-Electromagnetic drive mechanism; 121-Coil; 122-Yoke; 123-Armature assembly; 123a-First armature; 123b-Second armature; 13-Transmission mechanism; 15-Arc extinguishing mechanism; F1-First direction; F2-Second direction; F3-Third direction. Detailed Implementation

[0018] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0019] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] It should also be noted that, unless otherwise explicitly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0021] Please refer to Figure 1 , Figure 2a As shown, this application embodiment provides a contact structure 11, including: a first moving contact 111 and a second moving contact 112 disposed opposite to each other, at least one end of the first moving contact 111 and the second moving contact 112 forming a clamping space for clamping a first stationary contact 115, thereby realizing contact and closing between the moving contact and the first stationary contact 115, wherein the first moving contact 111 and the second moving contact 112 are not parallel.

[0022] In this application, the first moving contact 111 and the second moving contact 112 clamp the first stationary contact 115 to form a clamping contact. In this clamping contact, the current direction of adjacent moving contacts is the same, that is, the current direction of the first moving contact 111 and the second moving contact 112 is the same. When a short-circuit current is present, they exhibit a mutual attractive force, which can press the contacts together, thereby improving the product's short-circuit withstand performance. Furthermore, the clamping contact has fewer silver points, which can reduce costs.

[0023] It also includes a contact support 110, on which a first moving contact 111 and a second moving contact 112 are disposed. The contact support 110 is rotatably disposed within the housing 10. When driven, the contact support 110 can rotate relative to the housing 10, thereby realizing the contact or separation of the moving contact and the first stationary contact 115.

[0024] The contact support 110 is provided with a transmission part 110a and a drive system. Specifically, the drive system includes a transmission mechanism 13. The drive system drives the transmission part 110a to drive the contact support 110 to rotate around its rotation axis S, thereby causing the first moving contact 111 and the second moving contact 112 to move closer to or away from the first stationary contact 115, so as to realize the contact or separation of the moving contact and the first stationary contact 115.

[0025] like Figure 2b As shown, the rotation axis S of the transmission part 110a and the contact support 110 is not coaxial, which facilitates a compact spatial layout; the line connecting the transmission part 110a, the rotation axis O of the contact support 110, and the end of the moving contact used to form the clamping space forms an obtuse angle. Figure 2b This visually reflects that the line connecting the transmission part 110a, the rotating shaft O, and the end of the moving contact used to form the clamping space is set at an obtuse angle. This maximizes the transmission efficiency of the transmission force and reduces the loss of transmission force and energy dissipation and interference of the movement during the movement of the mechanism.

[0026] Furthermore, such as Figure 1 As shown, the first moving contact 111 and the second moving contact 112 are not arranged in parallel; that is, the first moving contact 111 and the second moving contact 112 are arranged at an angle on the contact support 110. This angled arrangement can reduce the friction when the contacts close, ensuring reliable closing and opening operation of the product.

[0027] Specifically, refer to Figure 2c As shown, the contact bracket 110 is provided with a first moving contact mounting groove 114a and a second moving contact mounting groove 114b. The first moving contact 111 and the second moving contact 112 are respectively disposed in the first moving contact mounting groove 114a and the second moving contact mounting groove 114b. The first moving contact 111 and the second moving contact 112 are installed through the first moving contact mounting groove 114a and the second moving contact mounting groove 114b.

[0028] In addition, an elastic element (not shown in the figure) is provided in the first moving contact mounting groove 114a and / or the second moving contact mounting groove 114b. The elastic element is generally a spring, and the elastic element abuts against the corresponding first moving contact 111 and / or second moving contact 112. The elastic element can continuously apply pressure to the first moving contact 111 and / or second moving contact 112 along the third direction F3 to provide contact pressure. The third direction F3 is the direction in which the first moving contact 111 and the second moving contact 112 clamp the first stationary contact 115, so that the first moving contact 111 and / or second moving contact 112 are tightly fitted with the first stationary contact 115 to ensure the stability of their contact.

[0029] For example, the contact support 110 is integrally formed to reduce the overall size of the contact support 110; at least one of the first moving contact mounting groove 114a and the second moving contact mounting groove 114b is configured as a U-shaped hole to facilitate the assembly of the first moving contact 111 and / or the second moving contact 112 and the elastic element.

[0030] The convex hole design allows for a stable mounting relationship between the first moving contact 111 and / or the second moving contact 112 and the contact support 110, ensuring the stability of the first moving contact 111 and the second moving contact 112.

[0031] In addition, both the first moving contact 111 and the second moving contact 112 are provided with moving contacts 11a at the ends used to form the clamping space to form a contact portion and reduce the contact resistance.

[0032] Reference Figure 4 As shown, stationary contacts 115a are respectively provided on opposite sides of the first stationary contact 115 for engaging with the moving contact 11a, and the stationary contacts 115a are not arranged in parallel.

[0033] The moving contact and the first stationary contact 115 make contact through their respective contact points, which reduces the contact resistance between the moving contact and the first stationary contact 115. Specifically, the two moving contacts 11a clamp the stationary contact 115a to achieve reliable contact between the moving contact 11a and the stationary contact 115a.

[0034] Two stationary contacts 115a are arranged opposite to each other on the first stationary contact 115 along the third direction F3, and the two stationary contacts 115a respectively make contact with the moving contacts 11a of the first moving contact 111 and the second moving contact 112.

[0035] When the moving contact moves toward and clamps the first stationary contact 115, the moving contact 11a of the first moving contact 111 and the second moving contact 112 makes contact with the corresponding stationary contact 115a of the first stationary contact 115, thus achieving closing. The arrangement of two stationary contacts 115a on the first stationary contact 115 allows for better contact between the first stationary contact 115 and the moving contact. In case one stationary contact 115a fails to make contact, the other stationary contact 115a can serve as a final guarantee for contact closing, thereby improving the safety and reliability of the system.

[0036] The first moving contact 111 and the second moving contact 112 form an angle along the extension of their widths, with the angle opening towards the first stationary contact 115. For example, the first moving contact 111 and the second moving contact 112 are arranged in a figure-eight shape along a third direction F3. That is, the distance between the first moving contact 111 and the second moving contact 112 along the third direction F3 is greater on the side closer to the first stationary contact 115 than on the side farther from the first stationary contact 115. This means that during the movement from the open to the closed position, the first stationary contact 115 will first enter the clamping area formed by the side farther between the first moving contact 111 and the second moving contact 112, further reducing the friction between the first moving contact 111, the second moving contact 112, and the first stationary contact 115, thus reducing product power consumption.

[0037] In some embodiments, such as Figure 3 As shown, the two stationary contacts 115a on the first stationary contact 115 are arranged in parallel, as follows: Figure 5 As shown, when the first moving contact 111 and the second moving contact 112 approach the first stationary contact 115, the bottom area with a large V-shaped spacing facilitates initial guidance to clamp the first stationary contact 115. As the first moving contact 111 and the second moving contact 112 get closer and closer to the first stationary contact 115, the top area with a small V-shaped spacing can clamp the first stationary contact 115. This arrangement facilitates the gradual guidance of the two first moving contacts 111 to clamp the first stationary contact 115 during the clamping process, ensuring the reliability of the clamping.

[0038] In other embodiments, such as Figure 4As shown, the two stationary contact points 115a on the first stationary contact 115 are not parallel, corresponding to the non-parallel arrangement of the first moving contact 111 and the second moving contact 112. In this way, the V-shaped arrangement between the first moving contact 111 and the second moving contact 112 can clamp the two V-shaped stationary contact points 115a, so that the moving contact and the first stationary contact 115 can make contact.

[0039] In addition, it includes a second stationary contact 116, located at the end of the first moving contact 111 and the second moving contact 112 away from the first stationary contact 115. A connecting portion is provided at the end of the first moving contact 111 and the second moving contact 112 near the second stationary contact 116 for connecting to a flexible connector. The first moving contact 111 and the second moving contact 112 are connected to the second stationary contact 116 via a flexible connector, and the connecting portion is located outside the contact support 110. This connection method provides a large and uniform contact area, low resistance, ensures stable current transmission, and is flexible and convenient for layout and installation. The connecting portion for the flexible connector in this application is located outside the contact support 110, facilitating product rotation and providing redundant space for the flexible connector.

[0040] Based on this, refer to Figure 6 As shown, this application embodiment also discloses a load switch, including a contact structure 11 as described above, and a drive system. The drive system includes an electromagnetic drive mechanism 12 and a transmission mechanism 13. The electromagnetic drive mechanism 12 includes a coil 121, a yoke 122, and an armature assembly 123. The axial direction of the coil 121 is along the F2 direction, and the contact structure 11 is located on the second direction side of the electromagnetic drive mechanism 12.

[0041] The electromagnetic drive mechanism 12 and the moving contact of the contact structure 11 are linked to drive the moving contact to move.

[0042] For example, the electromagnetic drive mechanism 12 includes a coil 121, a yoke 122, and an armature assembly 123. The armature assembly 123 includes a first armature 123a and a second armature 123b. When the coil 121 is energized, it generates a magnetic field, which drives the armature assembly 123 to rotate via the yoke 122. The armature assembly 123 serves as the power structure for driving the moving contact. It is connected to the contact support 110 of the moving contact via the transmission mechanism 13 of the drive system. One end of the transmission mechanism 13 is connected to the armature assembly 123, and the other end is connected to the contact structure 11, thereby driving the contact support 110 to rotate, so that the moving contact and the first stationary contact 115 make contact for closing or separation for opening. Furthermore, one end of the transmission mechanism 13 is hinged to the armature assembly 123, and the other end is hinged to the contact structure 11, which facilitates assembly.

[0043] The armature assembly 123 and the coil 121 are arranged along the first direction F1. Along the second direction F2, the projection of the coil 121 and the projection of the first stationary contact 115 at least partially overlap, ensuring a large opening distance while making the layout more compact. It also includes an arc extinguishing mechanism 15, with the moving contact and the arc extinguishing mechanism 15 arranged along the first direction F1 to rationally arrange the internal components of the load switch and make the overall structure of the load switch compact.

[0044] This load switch has the same structure and beneficial effects as the contact structure 11 in the foregoing embodiments. The structure and beneficial effects of the contact structure 11 have been described in detail in the foregoing embodiments and will not be repeated here.

[0045] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A contact structure, characterized in that, include: The first moving contact (111) and the second moving contact (112) are arranged opposite to each other. At least one end of the first moving contact (111) and the second moving contact (112) forms a clamping space for clamping the first stationary contact (115). The first moving contact (111) and the second moving contact (112) are not arranged in parallel.

2. The contact structure according to claim 1, characterized in that, The device includes a contact support (110), which is provided with a first moving contact mounting groove (114a) and a second moving contact mounting groove (114b). The first moving contact (111) and the second moving contact (112) are respectively disposed in the first moving contact mounting groove (114a) and the second moving contact mounting groove (114b). The contact support (110) is rotatably disposed within the housing (10).

3. The contact structure according to claim 1, characterized in that, The first moving contact (111) and the second moving contact (112) are each provided with a moving contact (11a) at one end for forming the clamping space to form a contact portion.

4. The contact structure according to claim 3, characterized in that, The first stationary contact (115) has stationary contacts (115a) on opposite sides, and the stationary contacts (115a) are not parallel.

5. The contact structure according to claim 2, characterized in that, An elastic element is also provided to provide contact pressure, the elastic element being disposed in the first moving contact mounting groove (114a) and / or the second moving contact mounting groove (114b). The contact support (110) is integrally formed, and at least one of the first moving contact mounting groove (114a) and the second moving contact mounting groove (114b) is a convex hole.

6. The contact structure according to claim 2, characterized in that, The contact support (110) is provided with a transmission part (110a) to connect with the drive system. The drive system drives the contact support (110) to rotate around its rotation axis (S) through the transmission part (110a). The transmission part (110a) and the contact support (110) are not coaxially arranged on the rotation axis (S). The line connecting the transmission part (110a), the rotation axis (O) of the contact support (110), and the end of the moving contact used to form the clamping space forms an obtuse angle.

7. The contact structure according to any one of claims 1 to 6, characterized in that, It also includes a second stationary contact (116), which is located at the end of the first moving contact (111) and the second moving contact (112) away from the first stationary contact (115). The first moving contact (111) and the second moving contact (112) are provided with a connecting part for connecting a flexible connection at the end near the second stationary contact (116) so as to connect with the second stationary contact (116) through the flexible connection. The connecting part is located outside the contact support (110).

8. The contact structure according to any one of claims 1 to 6, characterized in that, The first moving contact (111) and the second moving contact (112) form an angle along the extension of their widths, and the angle opening faces the first stationary contact (115).

9. A load switch, characterized in that, The invention includes a contact structure (11) as described in any one of claims 1 to 8, and a drive system comprising an electromagnetic drive mechanism (12) comprising a coil (121), a yoke (122), and an armature assembly (123), wherein the axial direction of the coil (121) is along a second direction (F2), and the contact structure (11) is located on the second direction (F2) side of the electromagnetic drive mechanism (12).

10. The load switch according to claim 9, characterized in that, The drive system also includes a transmission mechanism (13), one end of which is connected to the armature assembly (123) and the other end is connected to the contact structure (11). The armature assembly (123) and the coil (121) are arranged along a first direction (F1). The first stationary contact (115) and the second stationary contact (116) are arranged along the first direction (F1). Along the second direction (F2), the projection of the coil (121) at least partially overlaps with the projection of the first stationary contact (115). The system also includes an arc-extinguishing mechanism (15), and the moving contact and the arc-extinguishing mechanism (15) are arranged along the first direction (F1).

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