A load switch and an electric meter

Abstract

The utility model discloses a kind of load switch and electric meter, it is related to low-voltage electrical apparatus technical field.The load switch includes shell and the contact mechanism, arc extinguishing component and transmission part being set in shell.The arc extinguishing component and contact mechanism are along first direction setting, contact mechanism includes movable contact and static contact, movable contact includes movable contact point, movable contact point includes mutually connected first contact part and first non-contact part, first contact part is set to the side of first non-contact part along first direction close arc extinguishing component, static contact includes static contact point, transmission part is movably connected with movable contact.The load switch provided in the application can reduce the closing contact area of movable contact and static contact without affecting the current-carrying capacity, to ensure the arc extinguishing effect of arc extinguishing component, avoid fire accident, improve safety.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and more specifically, to a load switch and an electricity meter. 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 generally use magnetic circuit components to drive the armature assembly, which in turn drives the contact mechanism to open and close the circuit. During the opening and closing process, an arc-extinguishing component is needed to extinguish the generated arc. In current systems, the arc-extinguishing component and the contact mechanism are usually arranged side-by-side. However, the contact surface of the moving and stationary contacts in the contact mechanism is relatively large. This means that the portion of the contact surface closer to the arc-extinguishing component is effectively extinguished, while the portion farther away has a poorer arc-extinguishing effect, increasing the risk of fire and accidents, resulting in poor safety. Therefore, there is an urgent need for a load switch product with good arc-extinguishing performance and high safety. Utility Model Content

[0004] The purpose of this application is to provide a load switch and a meter that can reduce the closing contact area of ​​the moving and stationary contacts without affecting the current carrying capacity, so as to ensure the arc extinguishing effect of the arc extinguishing component, avoid fire accidents, and improve safety.

[0005] The embodiments of this application are implemented as follows: A first aspect of this application provides a load switch, including a housing and a contact mechanism, an arc-extinguishing assembly, and a transmission member disposed within the housing. The arc-extinguishing assembly and the contact mechanism are disposed along a first direction. The contact mechanism includes a moving contact and a stationary contact. The moving contact includes a moving point, which is disposed at one end of the moving contact. The end of the moving contact with the moving point is oscillating around the other end. The moving contact includes a first contact portion and a first non-contact portion connected to each other. The first contact portion is disposed on the side of the first non-contact portion close to the arc-extinguishing assembly along the first direction. The stationary contact includes a stationary contact. The transmission member is movably connected to the moving contact. The transmission member is used to drive the moving contact to close or open with the stationary contact, so that the first contact portion and the stationary contact contact or separate. The arc-extinguishing assembly is used to extinguish the arc generated between the first contact portion and the stationary contact.

[0006] As one possible implementation, the moving contact has a center line that divides the moving contact into two parts along a first direction, with the first contact portion located on the side of the center line closer to the arc extinguishing component.

[0007] As one possible implementation, the surface of the moving contact near the stationary contact is a flat surface or a convex arc surface; And / or, the surface of the stationary contact closest to the moving contact is a flat surface or a convex arc surface.

[0008] As one possible implementation, the moving contact includes a moving contact rod and a linkage part. The moving contact rod has a first end and a second end arranged opposite to each other. The linkage part is located on the side of the first end away from the moving contact and is movably connected to the transmission component. The moving contact is located at the first end. The first end is used to move relative to the second end under the drive of the transmission component. When the circuit is closed, the extension direction of the moving contact rod is set at a preset angle with the first direction. The preset angle is less than or equal to 45 degrees.

[0009] As one possible implementation, the moving contact also includes a limiting part disposed at the second end and connected to the moving contact rod. The limiting part has a limiting hole, and the housing is provided with a rotating shaft, which is rotatably engaged with the limiting hole.

[0010] As one possible implementation, the contact mechanism also includes a compression spring, the linkage part has an oblong hole, the transmission member extends into the oblong hole and is able to rotate and slide relative to the linkage part, one end of the compression spring is connected to the moving contact rod, and the other end abuts against the transmission member.

[0011] In one possible implementation, there are two moving contacts and two stationary contacts. The two moving contacts are arranged side by side along a second direction, and the position of each moving contact corresponds to the position of a stationary contact. The second direction is perpendicular to the first direction.

[0012] As one possible implementation, the load switch also includes a magnetic circuit assembly and an armature assembly disposed within the housing. The magnetic circuit assembly includes a coil and a yoke connected to each other. The axial direction of the coil is a first direction. The magnetic circuit assembly, the armature assembly, and the contact mechanism are arranged sequentially along a third direction. The armature assembly is connected to the contact mechanism through a transmission component. The third direction is perpendicular to the first direction.

[0013] As one possible implementation, the load switch also includes a magnetic shield and a suction aid disposed within the housing. The magnetic shield and the suction aid are disposed along a third direction, the magnetic shield and the coil are disposed along a first direction, and the suction aid and the yoke are disposed along the first direction.

[0014] As one possible implementation, the stationary contact includes a second contact portion and a second non-contact portion that are connected to each other. The second contact portion is disposed on the side of the second non-contact portion that is close to the arc extinguishing component along a first direction. The second contact portion is used to contact or separate from the first contact portion.

[0015] A second aspect of this application provides an electricity meter including the load switch described above. This electricity meter can reduce the closing contact area of ​​the moving and stationary contacts without affecting the current carrying capacity, thereby ensuring the arc-extinguishing effect of the arc-extinguishing assembly, preventing fire accidents, and improving safety.

[0016] The beneficial effects of the embodiments of this application include: The load switch includes a housing and a contact mechanism, an arc-extinguishing assembly, and a transmission component disposed within the housing. The arc-extinguishing assembly and the contact mechanism are arranged along a first direction. The contact mechanism includes a moving contact and a stationary contact. The moving contact includes a moving point, which is disposed at one end of the moving contact. The end of the moving contact with the moving point can swing around the other end. The moving contact includes a first contact portion and a first non-contact portion connected to each other. The first contact portion is disposed on the side of the first non-contact portion closer to the arc-extinguishing assembly along the first direction. The stationary contact includes a stationary contact. The transmission component is movably connected to the moving contact. The transmission component is used to drive the moving contact to close or open with the stationary contact, so that the first contact portion and the stationary contact can contact or separate. The arc-extinguishing assembly is used to extinguish the arc generated between the first contact portion and the stationary contact. The load switch provided in this application, through a first contact portion located near the arc-extinguishing assembly and a first non-contact portion connected to the first contact portion, enables the arc-starting point of the moving contact to be located on the side of the moving contact closer to the arc-extinguishing assembly. This makes it easier for the arc to enter the arc-extinguishing chamber of the arc-extinguishing assembly, thereby enabling the arc-extinguishing assembly to effectively extinguish the arc generated by the first contact portion and the stationary contact near it during the opening and closing process, improving arc-extinguishing performance, ensuring arc-extinguishing effect, preventing fire accidents, and improving safety. On the other hand, it keeps the cross-sectional area of ​​the moving contact and the stationary contact unchanged, avoiding any impact on the current carrying capacity, thereby ensuring that the energizing current of the load switch meets the requirements. 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 An isometric view of the load switch provided in the first embodiment of this utility model; Figure 2 This is a schematic diagram of the load switch in the first embodiment of the present invention when it is closed; Figure 3 This is a schematic diagram of the load switch in the first embodiment of the present invention when it is tripped; Figure 4 This is a schematic diagram of the connection between the moving contact and the stationary contact of the load switch when it is closed, provided in the first embodiment of this utility model. Figure 5 This is a schematic diagram of the structure of the load switch provided in the first embodiment of the present invention, showing the contact between the moving contact and the stationary contact when the switch is closed; Figure 6This is a schematic diagram of the load switch in the second embodiment of the present invention when it is closed; Figure 7 This is a schematic diagram of the load switch in the second embodiment of the present invention when it is tripped; Figure 8 This is a schematic diagram of the load switch in the third embodiment of the present invention when it is closed; Figure 9 This is a schematic diagram of the load switch in the third embodiment of the present invention when it is tripped; Figure 10 This is a schematic diagram of the connection between the transmission component and the moving contact in the load switch provided in the third embodiment of this utility model.

[0019] Icons: 100-Load switch; 110-Housing; 111-Rotating shaft; 120-Contact mechanism; 121-Moving contact; 1211-Moving point; 1212-First contact part; 1213-First non-contact part; 1214-Moving contact rod; 1215-Linkage part; 1216-First end; 1217-Second end; 1218-Limiting part; 1219-Limiting hole; 1220-Oval hole; 1221-Hole; 1222-Third non-contact part; 123-Stationary contact; 1231-Stationary Contact; 1232-Second contact part; 1233-Second non-contact part; 124-Compression spring; 125-Elastic sheet; 130-Arc extinguishing assembly; 140-Transmission component; 141-Connecting rod shaft; 150-Inlet terminal; 160-Connecting terminal; 170-Magnetic circuit assembly; 171-Coil; 172-Yoke; 180-Armature assembly; 181-Armature component; 182-Extension component; 183-Oblong hole; 184-Torsion spring; 190-Magnetic shield; 200-Attraction aid; 210-Assist spring. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] First Embodiment Please refer to the reference. Figures 1 to 5 This utility model provides a load switch 100 for interrupting and closing load current. It can reduce the closing contact area of ​​the moving contact 121 and the stationary contact 123 without affecting the current carrying capacity, thereby ensuring the arc-extinguishing effect of the arc-extinguishing assembly 130, preventing fire accidents, and improving safety.

[0027] The load switch 100 includes a housing 110 and a contact mechanism 120, an arc-extinguishing assembly 130, and a transmission member 140 disposed within the housing 110. The arc-extinguishing assembly 130 and the contact mechanism 120 are arranged along a first direction. The contact mechanism 120 includes a moving contact 121 and a stationary contact 123. The moving contact 121 includes a moving contact 1211, which is disposed at one end of the moving contact 1211. The end of the moving contact 1211 with the moving contact 1211 can swing around the other end. The moving contact 1211 includes a first contact portion 1212 and a first non-contact portion 1213 connected to each other. The first contact portion 1212 is disposed on the side of the first non-contact portion 1213 close to the arc-extinguishing assembly 130 along the first direction. The stationary contact 123 includes a stationary contact 1231. The transmission component 140 is movably connected to the moving contact 121. The transmission component 140 is used to drive the moving contact 121 to close or open with the stationary contact 123, so that the first contact portion 1212 and the stationary contact 1231 come into contact or separate. The arc extinguishing component 130 is used to extinguish the arc generated between the first contact portion 1212 and the stationary contact 1231.

[0028] The load switch 100 provided in this application, through a first contact portion 1212 located near the arc-extinguishing assembly 130 and a first non-contact portion 1213 connected to the first contact portion 1212, enables the arc-starting point of the moving contact 121 to be located on the side of the moving contact 1211 closer to the arc-extinguishing assembly 130, so that the arc can more easily enter the arc-extinguishing chamber of the arc-extinguishing assembly 130. This allows the arc-extinguishing assembly 130 to effectively extinguish the arc generated by the first contact portion 1212 and the stationary contact 1231 near it during the opening and closing process, improving arc-extinguishing performance, ensuring arc-extinguishing effect, preventing fire accidents, and improving safety. On the other hand, it can keep the cross-sectional area of ​​the moving contact 1211 and the stationary contact 1231 unchanged, avoiding any impact on the current carrying capacity, thereby ensuring that the energizing current of the load switch 100 meets the requirements.

[0029] Furthermore, to further improve arc-extinguishing performance and processing, the stationary contact 1231 is also configured to include a second contact portion 1232 and a second non-contact portion 1233 that are interconnected. The second contact portion 1232 is disposed on the side of the second non-contact portion 1233 that is close to the arc-extinguishing assembly 130 along the first direction, and the second contact portion 1232 is used to contact or separate from the first contact portion 1212.

[0030] It should be noted that when the moving contact 121 and the stationary contact 123 are closed, the first contact portion 1212 of the moving contact 1211 contacts the second contact portion 1232 of the stationary contact 1231, and the first non-contact portion 1213 of the moving contact 1211 is spaced apart from the second non-contact portion 1233 of the stationary contact 1231; when the moving contact 121 and the stationary contact 123 are open, the first contact portion 1212 of the moving contact 1211 separates from the second contact portion 1232 of the stationary contact 1231, and the first non-contact portion 1213 of the moving contact 1211 is spaced apart from the second non-contact portion 1233 of the stationary contact 1231; that is, the first non-contact portion 1212... 13 and the second non-contact part 1233 are always kept separate. During the opening and closing of the moving contact 121 and the stationary contact 123, no electric arc is generated between the first non-contact part 1213 and the second non-contact part 1233 (or a small electric arc is generated, which is easily extinguished by the arc extinguishing component 130 or extinguished naturally). The area where the main electric arc is generated is located between the first contact part 1212 and the second contact part 1232. Since the first contact part 1212 and the second contact part 1232 are both located close to the arc extinguishing component 130, the arc extinguishing component 130 can quickly and effectively extinguish the arc, ensuring the arc extinguishing effect and improving safety.

[0031] Furthermore, the load switch 100 also includes an incoming terminal 150 and a wiring terminal 160, both located on the same side of the housing 110 and used for connection to external equipment to achieve electrical connection between the load switch 100 and the external equipment. Specifically, as... Figure 5 As shown ( Figure 5 (The hollow arrow in the diagram indicates the direction of current flow). The first contact portion 1212 and the first non-contact portion 1213 in the moving contact 1211 are connected, and the second contact portion 1232 and the second non-contact portion 1233 in the stationary contact 1231 are connected. When the moving contact 121 and the stationary contact 123 are closed, the current flows through the stationary contact 1231 and the moving contact 1211. During this process, the entire stationary contact 1231 (including the second contact portion 1232 and the second non-contact portion 1233) and the entire moving contact 1211 (including the first non-contact portion 1233) are connected. Current flows through both the first contact portion 1212 and the first non-contact portion 1213. Since only the second contact portion 1232 is in contact with the first contact portion 1212, the current, after entering the first contact portion 1212 through the second contact portion 1232 (or entering the second contact portion 1232 through the first contact portion 1212), diffuses outward to the entire moving contact 1211 (or the entire stationary contact 1231) to ensure current carrying capacity, thereby ensuring that the energizing current of the load switch 100 meets the requirements. Specifically, in this embodiment, the incoming terminal 150 is connected to the stationary contact 123, and the terminal block 160 is connected to the moving contact 121.

[0032] In one possible implementation, the moving contact 1211 has a centerline (the centerline extending perpendicular to the first direction), such that the moving contact 1211 is divided into two parts along the first direction by the centerline. The first part is adjacent to the arc-extinguishing component 130, and the second part is further away from the arc-extinguishing component 130 than the first part. The first contact portion 1212 is located on the side of the centerline closer to the arc-extinguishing component 130 (i.e., the first part). Therefore, the area of ​​the first contact portion 1212 is less than or equal to half the area of ​​the moving contact 1211. A reasonable area of ​​the first contact portion 1212 can improve the arc-extinguishing effect of the arc-extinguishing component 130 while ensuring current carrying capacity, thus improving safety. And / or, the area of ​​the second contact portion 1232 is less than or equal to half the area of ​​the stationary contact 1231. A reasonable area of ​​the second contact portion 1232 can improve the arc-extinguishing effect of the arc-extinguishing component 130 while ensuring current carrying capacity, thus improving safety.

[0033] As one possible implementation, the surface of the moving contact 1211 near the stationary contact 1231 is a flat surface or a convex arc surface; and / or, the surface of the stationary contact 1231 near the moving contact 1211 is a flat surface or a convex arc surface; by matching the different shaped surfaces of the moving contact 1211 and the stationary contact 1231, the first contact portion 1212 and the second contact portion 1232 can be made to contact when the circuit is closed, while the first non-contact portion 1213 and the second non-contact portion 1233 always remain in a separated state.

[0034] In this embodiment, the surface of the moving contact 1211 near the stationary contact 1231 is a convex arc surface, and the surface of the stationary contact 1231 near the moving contact 1211 is a plane. Furthermore, since the surface of the moving contact 1211 near the stationary contact 1231 is a convex arc-shaped surface, in order to ensure reliable contact between the first contact portion 1212 and the second contact portion 1232 when the circuit is closed, due to structural limitations, a third non-contact portion 1222 is inevitably provided on the side of the first contact portion 1212 near the arc-extinguishing component 130. That is, the moving contact 1211 also includes a third non-contact portion 1222 (the area of ​​the third non-contact portion 1222 is much smaller than the area of ​​the first non-contact portion 1213). The first contact portion 1212 is located between the third non-contact portion 1222 and the first non-contact portion 1213. As can be seen from the right figure, the third non-contact portion 1222 will not contact the stationary contact 1231 when the circuit is closed, but current will still flow through the third non-contact portion 1222 to further ensure the current carrying capacity, thereby ensuring that the energizing current of the load switch 100 meets the requirements.

[0035] The moving contact 121 includes a moving contact rod 1214 and a linkage part 1215. The moving contact rod 1214 has a first end 1216 and a second end 1217 arranged opposite each other along its length. The linkage part 1215 is located on the side of the first end 1216 away from the moving contact 1211 and is movably connected to the transmission member 140 to prevent arc erosion of the linkage part 1215. The moving contact 1211 is located at the first end 1216, which is used to move relative to the second end 1217 under the drive of the transmission member 140. Specifically, the linkage part 1215 is movably connected to the transmission member 140, allowing the transmission member 140 to drive the entire moving contact 121 to move via the linkage part 1215, causing the moving contact 1211 to move away from or closer to the stationary contact 1231, thereby realizing the opening and closing function.

[0036] As one possible implementation, the moving contact rod 1214 is a rigid rod, and the moving contact rod 1214 is straight. When the circuit is closed, the extension direction of the moving contact rod 1214 is set at a preset angle with the first direction. The preset angle is less than or equal to 45 degrees, that is, when the circuit is closed, the extension direction of the moving contact rod 1214 is inclined to the first direction. A reasonable preset angle can ensure that the moving contact 1211 will naturally form a first contact portion 1212 and a first non-contact portion 1213 when the circuit is closed. Specifically, in this embodiment, when the first contact portion 1212 and the second contact portion 1232 are in reliable contact, there is a sufficient distance between the first non-contact portion 1213 and the second non-contact portion 1233 to avoid the generation of an electric arc between the first non-contact portion 1213 and the second non-contact portion 1233. For ease of understanding, the preset angle is denoted as α, such as... Figure 4 As shown.

[0037] In this embodiment, the first contact portion 1212 is located on the side of the first non-contact portion 1213 away from the second end 1217. When the circuit is closed, only the first contact portion 1212 contacts the stationary contact 1231. When the circuit is opened, the distance from the first contact portion 1212 to the stationary contact 1231 is greater than the distance from the first non-contact portion 1213 to the stationary contact 1231. This will lengthen the arc between the first contact portion 1212 and the stationary contact 1231, which is more conducive to arc extinguishing.

[0038] Furthermore, the moving contact 121 also includes a limiting part 1218 disposed at the second end 1217 and connected to the moving contact rod 1214. The limiting part 1218 has a limiting hole 1219. The housing 110 is provided with a rotating shaft 111, which is rotatably engaged with the limiting hole 1219. The limiting part 1218 can rotate relative to the rotating shaft 111 through the engagement of the rotating shaft 111 and the limiting hole 1219. The rotating shaft 111 can limit the limiting part 1218 through the engagement of the rotating shaft 111 and the limiting hole 1219. Specifically, the linkage part 1215 is movably connected to the transmission member 140. The transmission member 140 can drive the entire moving contact 121 to rotate relative to the rotating shaft 111 through the linkage part 1215, so that the moving contact 1211 moves away from or closer to the stationary contact 1231, thereby realizing the opening and closing function.

[0039] In this embodiment, the moving contact rod 1214 is a rigid rod, but it is not limited to this. In other embodiments, the moving contact rod 1214 is an elastic spring, that is, the moving contact rod 1214 itself has a certain elasticity. The transmission member 140 can overcome the elastic force of the moving contact rod 1214 to make the moving contact rod 1214 undergo elastic deformation. At this time, the second end 1217 is used to weld to the terminal 160 to limit the moving contact rod 1214 and realize the power connection function of the moving contact 121.

[0040] In one possible implementation, the contact mechanism 120 further includes a compression spring 124. The linkage 1215 has a slotted hole 1220, into which a transmission member 140 extends. The transmission member 140 is rotatable relative to the linkage 1215 and can also slide relative to the linkage 1215 along the long axis of the slotted hole 1220. One end of the compression spring 124 is connected to the first end 1216 of the movable contact rod 1214, and the other end abuts against the transmission member 140. Specifically, the long axis of the slotted hole 1220 is perpendicular to the length direction of the movable contact rod 1214. The compression spring 124 presses against the side of the transmission member 140 away from the movable contact 1211, and can apply a spring force to the transmission member 140, causing the transmission member 140 to have a tendency to move away from the movable contact 1211 along the long axis of the slotted hole 1220, thereby providing overtravel. In this way, during the closing process of the moving contact 121 and the stationary contact 123 using the transmission component 140, the transmission component 140 drives the first end 1216 of the moving contact rod 1214 to rotate downward through the elastic force of the compression spring 124 until the first contact portion 1212 contacts the second contact portion 1232, thereby reducing the contact pressure between the first contact portion 1212 and the second contact portion 1232 and avoiding damage to the first contact portion 1212 and the second contact portion 1232. During this process, the transmission component 140 is always in a position away from the moving contact 1211 along the long axis of the waist-shaped hole 1220. During the opening process of the moving contact 121 and the stationary contact 123 using the transmission component 140, the transmission component 140 directly drives the first end 1216 of the moving contact rod 1214 to rotate upward through the upper side wall of the waist-shaped hole 1220 away from the moving contact 1211, instead of transmitting the tension through the compression spring 124, so as to avoid damage to the compression spring 124.

[0041] In this embodiment, there are two moving contacts 121 and two stationary contacts 123. The two moving contacts 121 are arranged side by side along the second direction, and the position of each moving contact 121 corresponds to the position of one stationary contact 123. The second direction is perpendicular to the first direction. Both moving contacts 121 are movably connected to the transmission member 140. The transmission member 140 can drive the two moving contacts 121 to move away from or towards the two stationary contacts 123 simultaneously to realize the opening and closing function.

[0042] As one possible implementation, the load switch 100 also includes a magnetic circuit assembly 170 and an armature assembly 180 disposed within the housing 110. The magnetic circuit assembly 170 includes a coil 171 and a yoke 172 connected to each other. The axial direction of the coil 171 is a first direction. The magnetic circuit assembly 170, armature assembly 180, and contact mechanism 120 are arranged sequentially along a third direction. The armature assembly 180 is connected to the moving contact 121 of the contact mechanism 120 via a transmission member 140. The armature assembly 180 is used to drive the contact mechanism 120 to open and close the circuit under the drive of the magnetic circuit assembly 170 through the transmission member 140. Specifically, the third direction is perpendicular to the first direction. By arranging the magnetic circuit assembly 170, armature assembly 180, and contact mechanism 120 sequentially along the third direction, and the coil 171 with its axial direction in the first direction, the various components in the load switch 100 can be rationally arranged, ensuring a compact structure, reducing volume and space occupation, and improving applicability.

[0043] In one possible implementation, the load switch 100 further includes a magnetic shield 190 and a suction aid 200 disposed within the housing 110. The magnetic shield 190 and the suction aid 200 are disposed along a third direction, the magnetic shield 190 and the coil 171 are disposed along a first direction, and the suction aid 200 and the yoke 172 are disposed along the first direction, that is, the magnetic shield 190 and the suction aid 200 are disposed on the same side of the coil 171 and the yoke 172. The magnetic shield 190 and the coil 171 are spaced apart, and there is a certain distance between the magnetic shield 190 and the coil 171 to avoid magnetic short circuit. Specifically, the magnetic shield 190 is used to shield external magnetic field interference, enhance the anti-magnetic interference performance without affecting the normal operation of the magnetic circuit assembly 170, prevent the magnetic circuit assembly 170 from malfunctioning due to the influence of external magnetic fields, and improve the opening and closing accuracy; the suction aid 200 is used to provide additional force to ensure that the armature assembly 180 can start quickly when the contact mechanism 120 switches from the open state to the closed state, providing assistance for it.

[0044] Furthermore, the first direction, the second direction, and the third direction are perpendicular to each other, wherein the first direction is the width direction of the load switch 100, the second direction is the thickness direction of the load switch 100, and the third direction is the height direction of the load switch 100.

[0045] In one possible implementation, the armature assembly 180 includes an armature 181 and an extension 182. The armature 181 is connected to the extension 182, which extends toward the suction aid 200 and extends beyond the yoke 172 to facilitate cooperation with the suction aid 200. The end of the extension 182 away from the armature 181 is rotatably connected to the transmission member 140 so that the transmission member 140 can drive the moving contact 121 to close or open with the stationary contact 123.

[0046] This utility model embodiment also provides an electricity meter (not shown), including the load switch 100 described above. Since the structure and beneficial effects of the load switch 100 have been described in detail in the foregoing embodiments, they will not be repeated here.

[0047] Second Embodiment Please refer to the reference. Figure 6 and Figure 7 This utility model embodiment provides a load switch 100. Compared with the first embodiment, the difference in this embodiment is that the moving contact rod 1214 has a different shape.

[0048] In this embodiment, the moving contact rod 1214 is bent. The bending angle of the moving contact rod 1214 can be designed according to actual needs to ensure that when the circuit is closed, the first contact portion 1212 of the moving contact 1211 contacts the second contact portion 1232 of the stationary contact 1231, while the first non-contact portion 1213 of the moving contact 1211 and the second non-contact portion 1233 of the stationary contact 1231 are spaced apart. Through the bending design of the moving contact rod 1214, even when the line connecting the first end 1216 and the second end 1217 of the moving contact rod 1214 is in the same direction as the first direction, or when the angle between the line connecting the first end 1216 and the second end 1217 of the moving contact rod 1214 and the first direction is not within the preset angle range, the first contact portion 1212 and the second contact portion 1232 can still reliably contact, and there can be sufficient distance between the first non-contact portion 1213 and the second non-contact portion 1233. This overcomes the limitation of the preset angle in the first embodiment and improves versatility.

[0049] The beneficial effects of the load switch 100 provided in this embodiment are the same as those in the first embodiment, and will not be repeated here.

[0050] Third Embodiment Please refer to the reference. Figures 8 to 10 This utility model embodiment provides a load switch 100. Compared with the first embodiment, the difference in this embodiment is that the shape of the moving contact 1211 is different.

[0051] In this embodiment, the surface of the moving contact 1211 near the stationary contact 1231 is a plane, and the surface of the stationary contact 1231 near the moving contact 1211 is a plane. Through the contact of the two planes, it is possible to further ensure that the moving contact 1211 has more contact points in the second direction (i.e., the thickness direction of the load switch 100), thus ensuring more stable contact.

[0052] In this embodiment, the structure used to provide overtravel in the load switch has been adjusted. Specifically, the extension 182 of the armature assembly 180 has an elongated hole 183, and the transmission member 140 extends into the elongated hole 183. The transmission member 140 can rotate relative to the extension 182, and the transmission member 140 can also slide relative to the extension 182 along the long axis of the elongated hole 183. The armature assembly 180 also includes a torsion spring 184, which is mounted on the extension 182 and abuts against the transmission member 140, and can also provide overtravel. Its principle is the same as that of the first embodiment, and will not be described again here.

[0053] Furthermore, the transmission component 140 is provided with a connecting rod shaft 141, which extends into the hole 1221 on the linkage part 1215 and can be rotatably configured. When both the moving contact 1211 and the stationary contact 1231 are planar rather than convex arc surfaces, in order to ensure that the moving contact 1211 can contact the stationary contact 1231 on both sides in the width direction (i.e., the second direction) to extend the contact life, the diameter of the hole 1221 is set to be larger than the diameter of the connecting rod shaft 141. That is, the connecting rod shaft 141 has a certain amount of room for movement in the hole 1221, and the two can also move relative to each other. In this embodiment, the diameter of the rotating shaft 111 is also larger than the limiting hole 1219, so that the two can also move relative to each other. Through the design of the margin at these two places, it is ensured that the moving contact 121 can swing and adapt during the contact with the stationary contact 123, ensuring that it fits the stationary contact 123 and avoiding insufficient contact. Furthermore, the movable margin of the connecting rod shaft 141 in the hole 1221 is less than the sliding stroke of the transmission member 140 in the elongated hole 183, so as to avoid affecting the overtravel, and the overtravel and margin adjustment are controlled separately; of course, in other embodiments, the mechanism for providing overtravel can also be integrated with the margin design between the connecting rod shaft 141 and the hole 1221 and set on the moving contact rod 1214.

[0054] In this embodiment, the contact mechanism 120 further includes an elastic sheet 125. One end of the elastic sheet 125 is connected to the moving contact rod 1214, and the other end abuts against the connecting rod shaft 141. The elastic sheet 125 can apply elastic force to the connecting rod shaft 141 to achieve self-adjustment of the position of the connecting rod shaft 141 in the hole 1221. This ensures that when the circuit is closed, both sides of the moving contact 1211 along the width direction of the moving contact rod 1214 can contact the stationary contact 1231. This avoids the situation where uneven force transmission of the connecting rod shaft 141 causes the moving contact rod 1214 to deflect, resulting in the moving contact 1211 only contacting the stationary contact 1231 on one side. This ensures the contact effect and improves the stability of the power supply.

[0055] Furthermore, the elastic plate 125 is connected to the movable contact rod 1214 at the middle of the movable contact rod 1214 along its width direction, and the elastic plate 125 is abutted against the connecting rod shaft 141 at the middle of the connecting rod shaft 141 along its axial direction, so as to avoid the movable contact rod 1214 from deflection due to uneven force and improve the stability of transmission.

[0056] In this embodiment, the load switch 100 also includes an assisting spring 210, which is disposed below the moving contact rod 1214. One end of the assisting spring 210 is connected to the housing 110, and the other end abuts against the moving contact rod 1214. The assisting spring 210 is used to provide elastic force to the moving contact rod 1214 when the switch is opened, so as to assist the transmission member 140 in driving the first end 1216 of the moving contact rod 1214 to rotate upward.

[0057] The beneficial effects of the load switch 100 provided in this embodiment are the same as those in the first embodiment, and will not be repeated here.

[0058] 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 load switch, characterized in that, The device includes a housing (110) and a contact mechanism (120), an arc-extinguishing assembly (130), and a transmission member (140) disposed within the housing (110). The arc-extinguishing assembly (130) and the contact mechanism (120) are arranged along a first direction. The contact mechanism (120) includes a moving contact (121) and a stationary contact (123). The moving contact (121) includes a moving contact point (1211). The moving contact point (1211) is disposed at one end of the moving contact (121), and the end of the moving contact (121) with the moving contact point (1211) can swing around the other end. The moving contact point (1211) includes a first contact portion (1212) and a first non-contact portion connected to each other. The contact portion (1213) has a first contact portion (1212) disposed on the side of the first non-contact portion (1213) close to the arc extinguishing assembly (130) along the first direction. The stationary contact (123) includes a stationary contact point (1231). The transmission member (140) is movably connected to the moving contact (121). The transmission member (140) is used to drive the moving contact (121) and the stationary contact (123) to close or open, so that the first contact portion (1212) and the stationary contact point (1231) are in contact or separated. The arc extinguishing assembly (130) is used to extinguish the arc generated between the first contact portion (1212) and the stationary contact point (1231).

2. The load switch according to claim 1, characterized in that, The moving contact (1211) has a center line that divides the moving contact (1211) into two parts along the first direction, and the first contact part (1212) is located on the side of the center line closer to the arc extinguishing component (130).

3. The load switch according to claim 1, characterized in that, The surface of the moving contact (1211) near the stationary contact (1231) is either a flat surface or a convex arc surface; And / or, the surface of the stationary contact (1231) near the moving contact (1211) is a plane or a convex arc surface.

4. The load switch according to claim 1, characterized in that, The moving contact (121) includes a moving contact rod (1214) and a linkage part (1215). The moving contact rod (1214) has a first end (1216) and a second end (1217) arranged opposite to each other. The linkage part (1215) is located on the side of the first end (1216) away from the moving contact (1211) and is movably connected to the transmission member (140). The moving contact (1211) is located on the first end (1216). The first end (1216) is used to move relative to the second end (1217) under the drive of the transmission member (140). When the circuit is closed, the extension direction of the moving contact rod (1214) is set at a preset angle with the first direction. The preset angle is less than or equal to 45 degrees.

5. The load switch according to claim 4, characterized in that, The moving contact (121) further includes a limiting part (1218) disposed at the second end (1217) and connected to the moving contact rod (1214). The limiting part (1218) has a limiting hole (1219). The housing (110) is provided with a rotating shaft (111). The rotating shaft (111) is rotatably engaged with the limiting hole (1219).

6. The load switch according to claim 4, characterized in that, The contact mechanism (120) also includes a compression spring (124). The linkage part (1215) has an oblong hole (1220). The transmission member (140) extends into the oblong hole (1220). The transmission member (140) can rotate and slide relative to the linkage part (1215). One end of the compression spring (124) is connected to the moving contact rod (1214), and the other end abuts against the transmission member (140).

7. The load switch according to claim 1, characterized in that, The number of moving contacts (121) and stationary contacts (123) are both two. The two moving contacts (121) are arranged side by side along the second direction. The position of each moving contact (121) corresponds to the position of one stationary contact (123). The second direction is perpendicular to the first direction.

8. The load switch according to claim 1, characterized in that, The load switch further includes a magnetic circuit assembly (170) and an armature assembly (180) disposed within the housing (110). The magnetic circuit assembly (170) includes a coil (171) and a yoke (172) connected to each other. The axial direction of the coil (171) is the first direction. The magnetic circuit assembly (170), the armature assembly (180), and the contact mechanism (120) are arranged sequentially along a third direction. The armature assembly (180) is connected to the contact mechanism (120) through the transmission member (140). The third direction is perpendicular to the first direction.

9. The load switch according to claim 8, characterized in that, The load switch further includes a magnetic shield (190) and a suction aid (200) disposed within the housing (110). The magnetic shield (190) and the suction aid (200) are disposed along the third direction. The magnetic shield (190) and the coil (171) are disposed along the first direction. The suction aid (200) and the yoke (172) are disposed along the first direction.

10. The load switch according to any one of claims 1-9, characterized in that, The stationary contact (1231) includes a second contact portion (1232) and a second non-contact portion (1233) connected to each other. The second contact portion (1232) is disposed on the side of the second non-contact portion (1233) close to the arc extinguishing component (130) along the first direction. The second contact portion (1232) is used to contact or separate from the first contact portion (1212).

11. An electricity meter, characterized in that, Including the load switch as described in any one of claims 1-10.

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