A contact mechanism and load switch

Abstract

The utility model discloses a kind of contact mechanism and load switch, it is related to low-voltage electrical apparatus technical field.The contact mechanism includes shell and the moving contact, static contact, elastic member and transmission part being set in shell.The moving contact oppositely has first end and second end, first end is movably connected with shell, second end is used to be combined with static contact and brake, transmission part is connected with moving contact to drive moving contact movement, and it is set between first end and second end, elastic member is set between the connecting point of moving contact and transmission part and first end, elastic member is used to apply elastic force to moving contact to provide contact pressure when closing, elastic member is also used to apply elastic force to moving contact to improve brake speed when opening.The contact mechanism provided in the application can solve the problems of smaller closing contact pressure, poorer reliability, longer brake time and poorer stability in the prior art.

Description

Technical Field

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

[0002] The function of a load switch is to control the on / off state of the load in a circuit, so as to keep electrical appliances running safely. It is widely used in home appliances, remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment, and is one of the important control components.

[0003] Currently, load switches typically utilize magnetic circuit components to drive armature components, thereby opening and closing the moving and stationary contacts. However, in the closed state, the contact pressure between the moving and stationary contacts in current load switches is relatively low, making them prone to separation under external vibrations or environmental factors, resulting in poor reliability. Furthermore, the moving contact moves slowly during opening, leading to a longer opening time (from the start of opening to completion) and poor stability. Therefore, there is an urgent need for a load switch product with higher closing contact pressure, faster opening speed, and greater stability and reliability. Utility Model Content

[0004] The purpose of this application is to provide a contact mechanism and a load switch that can solve the problems of low closing contact pressure, poor reliability, long opening time, and poor stability in the prior art.

[0005] A first aspect of this application provides a contact mechanism, including a housing and a moving contact, a stationary contact, an elastic element, and a transmission element disposed within the housing. The moving contact has a first end and a second end disposed opposite to each other. The first end is movably connected to the housing, and the second end is used for opening and closing with the stationary contact. The transmission element is connected to the moving contact to drive the moving contact to move and is disposed between the first end and the second end. The elastic element is disposed between the connection point between the moving contact and the transmission element and the first end. The elastic element is used to apply a spring force to the moving contact to provide contact pressure when closing, and the elastic element is also used to apply a spring force to the moving contact to increase the opening speed when opening.

[0006] In one possible implementation, a first mating structure is provided at the first end, and a second mating structure is provided at the housing. The first mating structure and the second mating structure are mated to allow the first end to slide and / or rotate relative to the housing.

[0007] In one possible implementation, the first mating structure is an oblong hole, and the second mating structure is a fixed shaft, which extends into and mates with the oblong hole; or, the first mating structure is a guide shaft, and the second mating structure is a slide groove, which extends into and mates with the slide groove.

[0008] As one possible implementation, the elastic element is a spring sheet or a compression spring, which is located on the side of the moving contact closer to the stationary contact; or, the elastic element is a tension spring, which is located on the side of the moving contact away from the stationary contact.

[0009] As one possible implementation, the contact mechanism also includes a magnetizing element, which is disposed on the side of the moving contact near the stationary contact, and the elastic element is connected to the magnetizing element.

[0010] As one possible implementation, the magnetizing component includes a first magnetizing block and a second magnetizing block. The first magnetizing block includes a sidewall, which is arranged parallel to and spaced apart from the second magnetizing block.

[0011] As one possible implementation, the first magnetizing block further includes an end wall connected to the side wall. The side wall and the second magnetizing block are disposed opposite to each other on both sides of the end wall and are both perpendicular to the end wall. The elastic element is connected to the end wall.

[0012] As one possible implementation, the second end is provided with two moving contacts, which are arranged in parallel and spaced apart. The stationary contact is provided with two stationary contacts, which are arranged in parallel and spaced apart. Each moving contact is used to contact one stationary contact when the circuit is closed. The midpoint between the two moving contacts corresponds to the center position of the elastic element. And / or, the width of the elastic element is greater than the distance between the two moving contacts.

[0013] As one possible implementation, the contact mechanism further includes a first terminal block and a second terminal block, wherein the first terminal block is connected to the first end and the second terminal block is connected to the stationary contact.

[0014] A second aspect of this application provides a load switch, including an electromagnetic drive system and the aforementioned contact mechanism. The electromagnetic drive system is disposed within a housing and connected to a transmission component. This load switch can solve the problems of low closing contact pressure, poor reliability, long opening time, and poor stability in the prior art.

[0015] The beneficial effects of the embodiments of this application include:

[0016] The contact mechanism includes a housing and a moving contact, a stationary contact, an elastic element, and a transmission element disposed within the housing. The moving contact has a first end and a second end disposed opposite to each other. The first end is movably connected to the housing, and the second end is used for opening and closing with the stationary contact. The transmission element is connected to the moving contact to drive the moving contact to move and is disposed between the first end and the second end. The elastic element is disposed between the connection point between the moving contact and the transmission element and the first end. The elastic element is used to apply a spring force to the moving contact to provide contact pressure when closing, and the elastic element is also used to apply a spring force to the moving contact to increase the opening speed when opening. The contact mechanism provided in this application, through a transmission member disposed between the first end and the second end, and an elastic member disposed between the connection point of the moving contact and the transmission member and the first end, enables the elastic member to continuously apply elastic force to the moving contact during closing, thereby pressing the moving contact against the stationary contact, increasing the contact pressure between the moving and stationary contacts, preventing the moving and stationary contacts from separating under the influence of external vibration or environmental factors, and improving the reliability of closing. On the other hand, it enables the elastic member to apply elastic force to the moving contact during opening, thereby assisting in driving the moving contact to move away from the stationary contact, increasing the opening speed, shortening the opening time, and improving the stability of opening. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A front view of the contact mechanism provided in an embodiment of this utility model;

[0019] Figure 2 An isometric view of the contact mechanism provided in an embodiment of this utility model;

[0020] Figure 3 A schematic diagram of the contact mechanism in the open state provided in an embodiment of this utility model;

[0021] Figure 4 A schematic diagram of the contact mechanism in the closed state provided in an embodiment of this utility model;

[0022] Figure 5 This is a schematic diagram of the magnetizing component in the contact mechanism provided in an embodiment of the present utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the moving contact in the contact mechanism provided in an embodiment of the present utility model;

[0024] Figure 7A schematic diagram of the structure of the load switch provided in an embodiment of this utility model.

[0025] Icons: 10-Load switch; 100-Contact mechanism; 110-Housing; 111-Second mating structure; 1111-Fixed shaft; 120-Moving contact; 121-First end; 122-Second end; 123-First mating structure; 1231-Oval hole; 124-Moving contact block; 125-Contact body; 126-Hinge frame; 127-Fixed frame; 128-Limiting hole; 130-Stationary contact; 131-Stationary contact block; 140-Elastic element; 141-Spring; 150-Transmission element; 160-Magnetic element; 161-First magnetic block; 162-Second magnetic block; 163-Side wall; 164-End wall; 165-Leaving notch; 170-First terminal block; 180-Second terminal block; 200-Electromagnetic drive system. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this utility model, it should be noted that the terms "inner," "outer," "upper," "lower," "horizontal," 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 utility model product is in use. They are only for the convenience of describing this utility model and 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 utility model. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" 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 mechanical connection or an electrical 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 utility model based on the specific circumstances.

[0031] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the features in the following embodiments can be combined with each other.

[0032] Please refer to the reference. Figures 1 to 6 This utility model provides a contact mechanism 100 for opening or closing the circuit breaker. It solves the problems of low closing contact pressure, poor reliability, long opening time, and poor stability in the prior art.

[0033] The contact mechanism 100 includes a housing 110 and a moving contact 120, a stationary contact 130, an elastic element 140, and a transmission element 150 disposed within the housing 110. The moving contact 120 has a first end 121 and a second end 122 disposed opposite to each other. The first end 121 is movably connected to the housing 110, and the second end 122 is used for opening and closing with the stationary contact 130. The transmission element 150 is connected to the moving contact 120 to drive the moving contact 120 to move, and is disposed between the first end 121 and the second end 122. The elastic element 140 is disposed between the connection point of the moving contact 120 and the transmission element 150 and the first end 121. The elastic element 140 is used to deform when closing, thereby applying elastic force to the moving contact 120 to provide contact pressure. The elastic element 140 is also used to apply elastic force to the moving contact 120 when opening to increase the opening speed.

[0034] The contact mechanism 100 provided in this application, through a transmission member 150 disposed between the first end 121 and the second end 122, and an elastic member 140 disposed between the connection point of the moving contact 120 and the transmission member 150 and the first end 121, enables the elastic member 140 to continuously apply elastic force to the moving contact 120 during closing, thereby pressing the moving contact 120 against the stationary contact 130, increasing the contact pressure between the moving contact 120 and the stationary contact 130, preventing the moving contact 120 and the stationary contact 130 from separating under the influence of external vibration or environmental factors, and improving the reliability of closing; on the other hand, enables the elastic member 140 to apply elastic force to the moving contact 120 during opening, thereby assisting in driving the moving contact 120 to move away from the stationary contact 130, increasing the opening speed, shortening the opening time, and improving the stability of opening.

[0035] In this embodiment, the stationary contact 130 is disposed to the right of the moving contact 120. When the contact mechanism 100 is in the closed state, the second end 122 is in contact with the stationary contact 130. At this time, the second end 122 is in the rightmost position and the first end 121 is in the leftmost position. Since the moving contact 120 can rotate around the transmission member 150, and the elastic member 140 is disposed between the transmission member 150 and the first end 121, the elastic member 140 applies a spring force to the moving contact 120 so that the entire moving contact 120 has a rotational tendency (the first end 121 to the left and the second end 122 to the right), pressing the second end 122 and the stationary contact 130 together, increasing the contact pressure between the second end 122 and the stationary contact 130, and improving the reliability of closing. During the opening process of the contact mechanism 100, the transmission member 150 drives the moving contact 120 to move away from the stationary contact 130 (to the left) so that the moving contact 120 separates from the stationary contact 130. During this process, the elastic member 140 applies a leftward elastic force to the moving contact 120 to assist in driving the moving contact 120 to move to the left, thereby increasing the opening speed, shortening the opening time, and improving the stability of the opening.

[0036] In one possible implementation, the first end 121 is provided with a first mating structure 123, and the housing 110 is provided with a second mating structure 111. The first mating structure 123 and the second mating structure 111 cooperate to allow the first end 121 to slide and / or rotate relative to the housing 110. Specifically, through the cooperation of the first mating structure 123 and the second mating structure 111, the first end 121 can rotate relative to the housing 110 to adjust the angle of the moving contact 120 relative to the stationary contact 130, thereby avoiding jamming that affects the opening and closing effect of the moving contact 120 and the stationary contact 130. It also allows the first end 121 to slide relative to the housing 110 to adjust the position of the moving contact 120 relative to the stationary contact 130, providing overtravel for the contact mechanism 100, thereby simply and efficiently realizing the opening and closing function of the moving contact 120 and the stationary contact 130.

[0037] In this embodiment, the first mating structure 123 is an oblong hole 1231, and the second mating structure 111 is a fixed shaft 1111. The fixed shaft 1111 extends into the oblong hole 1231 and mates with it. The first end 121 can move relative to the housing 110 through the mating of the fixed shaft 1111 and the oblong hole 1231. The housing 110 can limit the first end 121 through the mating of the fixed shaft 1111 and the oblong hole 1231, thereby limiting the moving contact 120. Specifically, the first end 121 can rotate relative to the fixed shaft 1111 to adjust the angle of the moving contact 120 relative to the stationary contact 130. The first end 121 can also slide relative to the fixed shaft 1111 along the long axis of the oblong hole 1231 to adjust the position of the moving contact 120 relative to the stationary contact 130. However, it is not limited to this. In other embodiments, the first mating structure 123 is a guide shaft and the second mating structure 111 is a sliding groove. The guide shaft extends into the sliding groove and is mated with the sliding groove, which can also realize the function of sliding and / or rotating the first end 121 relative to the housing 110.

[0038] It should be noted that during the opening and closing process of the contact mechanism 100, the position movement of the fixed shaft 1111 within the oblong hole 1231 needs to be determined according to the specific tooling. It is only necessary that during the switching process of the moving contact 120 and the stationary contact 130 from opening to closing, the elastic element 140 is deformed by force, and its force causes the first end 121 of the moving contact to tend to move to the left, thereby providing contact pressure between the second end 122 and the stationary contact 130 through the connection point. This embodiment describes one of the movement modes for ease of understanding, but other embodiments are not limited to this movement mode.

[0039] In this embodiment, when the contact mechanism 100 is in the open state, the second end 122 is spaced apart from the stationary contact 130, the elastic element 140 is spaced apart from the moving contact 120 (i.e., the elastic element 140 does not apply elastic force to the moving contact 120), and the fixed shaft 1111 is located at the rightmost end of the waist-shaped hole 1231. At this time, the second end 122 is in the leftmost position and the first end 121 is in the rightmost position.

[0040] During the closing process of the contact mechanism 100, the transmission member 150 drives the moving contact 120 to move towards the stationary contact 130 (moving to the right). During this process, the entire moving contact 120 rotates around the fixed shaft 1111 until the second end 122 is in contact with the stationary contact 130. During the rotation of the moving contact 120, since the fixed shaft 1111 is engaged with the oblong hole 1231, the first end 121 will slide relative to the fixed shaft 1111 along the long axis of the oblong hole 1231, so that the fixed shaft 1111 moves from the rightmost end of the oblong hole 1231 to the leftmost end of the oblong hole 1231. Then the elastic member 140 abuts against the moving contact 120. (i.e., the elastic element 140 applies a leftward elastic force to the moving contact 120). At this time, the second end 122 has not yet contacted the stationary contact 130, so that the moving contact 120 is driven to rotate around the transmission element 150, so that the first end 121 slides relative to the fixed shaft 1111 along the long axis of the waist-shaped hole 1231, thereby allowing the fixed shaft 1111 to move from the leftmost end of the waist-shaped hole 1231 to the rightmost end of the waist-shaped hole 1231. After that, the transmission element 150 continues to drive the moving contact 120 to move towards the stationary contact 130 until the second end 122 moves to the rightmost position and is in contact with the stationary contact 130, while the first end 121 moves to the leftmost position.

[0041] When the contact mechanism 100 is in the closed state, the second end 122 is fitted with the stationary contact 130, and the fixed shaft 1111 is located at the rightmost end of the oblong hole 1231. At this time, the elastic element 140 applies a leftward elastic force to the moving contact 120, so that the entire moving contact 120 has a tendency to rotate around the connection point between the transmission element 150 and the moving contact 120. Since the first end 121 and the second end 122 are arranged opposite to each other on both sides of the transmission element 150, the second end 122 will be pressed to the right under the elastic force of the elastic element 140, thereby increasing the contact pressure between the second end 122 and the stationary contact 130 and improving the reliability of closing.

[0042] During the opening process of the contact mechanism 100, the transmission member 150 drives the moving contact 120 to move away from the stationary contact 130 (to the left). During this process, the connection point between the transmission member 150 and the moving contact 120 is no longer a fulcrum. The elastic member 140 applies a spring force to the moving contact 120, causing it to move to the left as a whole, to assist in driving the moving contact 120 to move to the left and increase the opening speed to assist in opening. After that, the elastic member 140 begins to return to its original state until the opening is completed. During the entire opening process, since the entire moving contact 120 moves to the left, the fixed shaft 1111 will remain at the rightmost end of the oblong hole 1231, that is, the first end 121 will not slide relative to the fixed shaft 1111 along the long axis of the oblong hole 1231.

[0043] In this embodiment, the elastic element 140 is a spring sheet 141, which is disposed on the side of the moving contact 120 near the stationary contact 130. When the contact mechanism 100 is in the open state, the spring sheet 141 and the moving contact 120 are spaced apart. When the contact mechanism 100 is in the closed state, the spring sheet 141 abuts against the moving contact 120. Specifically, the moving contact 120 can apply pressure to the spring sheet 141 during the closing process (after contacting the spring sheet 141) to cause the spring sheet 141 to undergo elastic deformation, thereby causing the spring sheet 141 to apply a reaction force to the moving contact 120 and thus provide contact pressure to the contact mechanism 100. However, this is not the only option. In another embodiment, the elastic element 140 is a compression spring, which is located on the side of the moving contact 120 closer to the stationary contact 130. The moving contact 120 can apply pressure to the compression spring during the closing process (after contacting the compression spring) to cause the compression spring to undergo elastic deformation, thereby causing the compression spring to apply a reaction force to the moving contact 120. In another embodiment, the elastic element 140 is a tension spring, which is located on the side of the moving contact 120 away from the stationary contact 130. The moving contact 120 can apply tension to the tension spring during the closing process (after contacting the tension spring) to cause the tension spring to undergo elastic deformation, thereby causing the tension spring to apply a reaction force to the moving contact 120.

[0044] As one possible implementation, the contact mechanism 100 further includes a magnetizing element 160, which is installed within the housing 110. The magnetizing element 160 is disposed on the side of the moving contact 120 near the stationary contact 130 to enhance the short-term withstand capability of the contact; furthermore, the elastic element 140 is connected to the magnetizing element 160. Specifically, one end of the elastic element 140 is connected to the magnetizing element 160, and the other end is used to abut against the moving contact 120 during the closing process. The magnetizing element 160 can, on the one hand, position the elastic element 140 and facilitate its installation, preventing the elastic element 140 from shifting or deforming during the operation of the contact mechanism 100; on the other hand, it can increase the contact force between the moving contact 120 and the stationary contact 130, ensuring stable contact between the moving contact 120 and the stationary contact 130.

[0045] In this embodiment, the elastic element 140 is connected to the magnetizing element 160, but it is not limited to this. In other embodiments, the elastic element 140 can also be connected to other parts or directly connected to the housing 110. The connection method of the elastic element 140 is not specifically limited.

[0046] In one possible implementation, the magnetizing component 160 includes a first magnetizing block 161 and a second magnetizing block 162. The first magnetizing block 161 can be separately disposed from the second magnetizing block 162, or it can be integrally formed with the second magnetizing block 162. The first magnetizing block 161 includes a sidewall 163, which is disposed parallel to and spaced apart from the second magnetizing block 162.

[0047] In this embodiment, the first magnetizing block 161 further includes an end wall 164 connected to the side wall 163. The side wall 163 and the second magnetizing block 162 are disposed opposite to each other on both sides of the end wall 164, and are both perpendicular to the end wall 164. The side wall 163, the end wall 164, and the second magnetizing block 162 together form a U-shape. The elastic member 140 is connected to the end wall 164, and the end wall 164 can position the elastic member 140. Specifically, the side wall 163 and the second magnetizing block 162 are disposed opposite to each other on both sides of the moving contact 120 in the width direction to further increase the contact force between the moving contact 120 and the stationary contact 130, thereby ensuring stable contact between the moving contact 120 and the stationary contact 130, and further improving the operational stability and short-circuit current tolerance of the contact mechanism 100.

[0048] Preferably, the side wall 163 is provided with a clearance notch 165, the position of which corresponds to the installation position of the elastic element 140. The operator can install the elastic element 140 onto the end wall 164 through the clearance notch 165, so as to facilitate the installation, maintenance and replacement of the elastic element 140. This is convenient and practical, and the clearance notch 165 will not affect the magnetization effect of the entire magnetizing element 160.

[0049] As one possible implementation, the second end 122 is provided with two moving contacts 124, which are arranged in parallel and spaced apart. The stationary contact 130 is provided with two stationary contacts 131, which are arranged in parallel and spaced apart. Each moving contact 124 is used to contact one stationary contact 131 when the circuit is closed. The two moving contacts 124 and the two stationary contacts 131 work together to realize the dual-contact function of the contact mechanism 100, reduce contact resistance, and improve breaking performance.

[0050] In this embodiment, the midpoint between the two moving contacts 124 corresponds to the center of the elastic element 140. The midpoint between the two moving contacts 124 is the midpoint in the width direction of the moving contact 120. The elastic element 140 can apply elastic force to the midpoint in the width direction of the moving contact 120 to ensure the balance of the moving contact 120 in the width direction during movement, and to ensure that both moving contacts 124 can open and close with the two stationary contacts 130. Furthermore, the width of the elastic element 140 is greater than the distance between the two moving contacts 124 (i.e., the minimum distance between the two moving contacts 124), so that both moving contacts 124 have the elastic element 140 to provide contact pressure, ensuring that both moving contacts 124 can make stable contact with the corresponding stationary contact 131.

[0051] In one possible implementation, the contact mechanism 100 further includes a first terminal block 170 and a second terminal block 180. The first terminal block 170 is connected to the first terminal 121, and the second terminal block 180 is connected to the stationary contact 130. Both the first terminal block 170 and the second terminal block 180 are used to connect to external devices. The first terminal block 170 and the second terminal block 180 work together to realize the electrical connection between the contact mechanism 100 and the external devices.

[0052] Preferably, the moving contact 120 includes a contact body 125 and a hinge frame 126 and a fixed frame 127 connected to the contact body 125; the hinge frame 126, the fixed frame 127 and the moving contact block 124 are all connected to one side of the contact body 125, and the first terminal block 170 is connected to the other side of the contact body 125. Specifically, the fixed frame 127 is located at the first end 121, and the oblong hole 1231 is opened on the fixed frame 127; the hinge frame 126 is located between the first end 121 and the second end 122, and the hinge frame 126 and the contact body 125 together form a limiting hole 128, the transmission member 150 is disposed through the limiting hole 128 and rotates with the limiting hole 128; the moving contact block 124 is located at the second end 122, and the moving contact block 124 is used to open and close with the stationary contact block 131.

[0053] Please refer to Figure 7 This application also provides a load switch 10, including an electromagnetic drive system 200 and the aforementioned contact mechanism 100. The electromagnetic drive system 200 is disposed within a housing 110 and connected to a transmission member 150. Since the structure and beneficial effects of the contact mechanism 100 have been described in detail in the foregoing embodiments, they will not be repeated here.

[0054] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A contact mechanism, characterized in that, The device includes a housing (110) and a moving contact (120), a stationary contact (130), an elastic element (140), and a transmission element (150) disposed within the housing (110). The moving contact (120) has a first end (121) and a second end (122) disposed opposite to each other. The first end (121) is movably connected to the housing (110), and the second end (122) is used to open and close the circuit with the stationary contact (130). The transmission element (150) is connected to the moving contact (120) to drive... The moving contact (120) is moved and is disposed between the first end (121) and the second end (122). The elastic element (140) is disposed between the connection point of the moving contact (120) and the transmission element (150) and the first end (121). The elastic element (140) is used to apply elastic force to the moving contact (120) to provide contact pressure when closing. The elastic element (140) is also used to apply elastic force to the moving contact (120) to increase the opening speed when opening.

2. The contact mechanism according to claim 1, characterized in that, The first end (121) is provided with a first mating structure (123), and the housing (110) is provided with a second mating structure (111). The first mating structure (123) and the second mating structure (111) are mated to allow the first end (121) to slide and / or rotate relative to the housing (110).

3. The contact mechanism according to claim 2, characterized in that, The first mating structure (123) is a waist-shaped hole (1231), and the second mating structure (111) is a fixed shaft (1111). The fixed shaft (1111) extends into the waist-shaped hole (1231) and mates with the waist-shaped hole (1231). Alternatively, the first mating structure (123) is a guide shaft, and the second mating structure (111) is a groove, with the guide shaft extending into the groove and mating with it.

4. The contact mechanism according to claim 1, characterized in that, The elastic element (140) is a spring sheet (141) or a compression spring, and the spring sheet (141) or compression spring is disposed on the side of the moving contact (120) near the stationary contact (130); Alternatively, the elastic element (140) may be a tension spring, which is located on the side of the moving contact (120) away from the stationary contact (130).

5. The contact mechanism according to claim 1, characterized in that, The contact mechanism further includes a magnetizing element (160), which is disposed on the side of the moving contact (120) near the stationary contact (130), and the elastic element (140) is connected to the magnetizing element (160).

6. The contact mechanism according to claim 5, characterized in that, The magnetizing component (160) includes a first magnetizing block (161) and a second magnetizing block (162). The first magnetizing block (161) includes a sidewall (163), which is arranged parallel to and spaced apart from the second magnetizing block (162).

7. The contact mechanism according to claim 6, characterized in that, The first magnetizing block (161) further includes an end wall (164) connected to the side wall (163). The side wall (163) and the second magnetizing block (162) are disposed opposite to each other on both sides of the end wall (164) and are both perpendicular to the end wall (164). The elastic member (140) is connected to the end wall (164).

8. The contact mechanism according to claim 1, characterized in that, The second end (122) is provided with two moving contacts (124), which are arranged in parallel and spaced apart. The stationary contact (130) is provided with two stationary contacts (131), which are arranged in parallel and spaced apart. Each moving contact (124) is used to contact one of the stationary contacts (131) when the circuit is closed. The midpoint between the two movable contacts (124) corresponds to the center position of the elastic element (140); and / or, the width of the elastic element (140) is greater than the distance between the two movable contacts (124).

9. The contact mechanism according to claim 1, characterized in that, The contact mechanism further includes a first terminal block (170) and a second terminal block (180), the first terminal block (170) being connected to the first end (121) and the second terminal block (180) being connected to the stationary contact (130).

10. A load switch, characterized in that, It includes an electromagnetic drive system (200) and a contact mechanism as described in any one of claims 1-9, wherein the electromagnetic drive system (200) is disposed within the housing (110) and connected to the transmission member (150).

Images