A load switch and a meter

Abstract

The embodiment of the utility model provides a kind of load switch and electric meter, it is related to electrical equipment technical field.The load switch includes static contact, moving contact and pusher, moving contact is oppositely arranged with static contact;The side of moving contact away from static contact is provided with connecting piece;Pusher is used to drive moving contact to rotate, to make moving contact and static contact to close or separate;Wherein, connecting piece is in the shape of the Chinese character, and connecting piece includes first connecting part and second connecting part that are connected at an angle with each other;First connecting part is connected with moving contact;Second connecting part is connected with pusher.By setting the connecting piece in the shape of the Chinese character, the force arm of the pusher is extended, thereby reducing the required operating force, so that the contact can complete the opening or closing action at a faster speed.And by setting the connecting piece in the shape of the Chinese character, the stress when the moving contact closes is also dispersed, improving the service life and operational reliability of the load switch.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a load switch and an electric meter. Background Art

[0002] As a key electric energy control and protection device, load switches are widely used in electric meters, power distribution systems and various electrical equipment. Their core function is to safely and reliably connect and break normal load current. A load switch can break the rated load current and a certain overload current, and realizes switching on or off of the switch through contact or separation of its internal moving contact and stationary contact.

[0003] However, existing load switches require large operating force and have low switching on / off speed. Moreover, huge impact force will be generated at the moment when the moving contact and the stationary contact are closed, and stress concentration and uneven force on the moving contact occur in existing load switches, thereby limiting the mechanical life and reliability of the load switch. Utility Model Content

[0004] The utility model provides a load switch and an electric meter, which can disperse stress when a moving contact is closed, and improve the service life and reliability of the load switch.

[0005] Embodiments of the utility model can be implemented as follows: An embodiment of the utility model provides a load switch, comprising: a stationary contact; a moving contact, wherein the moving contact is arranged opposite to the stationary contact; a connecting piece is arranged on a side of the moving contact facing away from the stationary contact; a pushing piece, wherein the pushing piece is used for driving the moving contact to rotate, so that the moving contact and the stationary contact are closed or separated; wherein the connecting piece is in an inverted T shape, the connecting piece comprises a first connecting part and a second connecting part which are connected at an angle to each other; the first connecting part is connected with the moving contact; the second connecting part is connected with the pushing piece.

[0006] In an optional embodiment, the second connecting part is provided with a mounting hole, and a push rod of the pushing piece passes through the mounting hole to be movably connected with the second connecting part.

[0007] In an optional embodiment, the connecting piece is located at a movable end of the moving contact, and the mounting hole is located above a moving contact point of the moving contact.

[0008] In an optional embodiment, the first connecting part is detachably connected with the moving contact.

[0009] In an optional embodiment, the first connecting part is connected with the moving contact through a threaded fastener.

[0010] In an optional embodiment, the number of the first connecting portions is two, the two first connecting portions are parallel and spaced apart along the width direction of the movable contact, and the second connecting portion is located between the two first connecting portions and connects the two first connecting portions.

[0011] In an optional embodiment, the first connecting portion is perpendicularly connected to the second connecting portion.

[0012] In an optional embodiment, a first contact and a second contact are arranged at intervals on the movable contact, and the connecting member is located between the first contact and the second contact.

[0013] In an optional embodiment, the first contact and the second contact are spaced apart along the length direction of the movable contact.

[0014] In an optional embodiment, the connecting member comprises two said first connecting portions and two said second connecting portions, and the two first connecting portions and the two second connecting portions are arranged in one-to-one correspondence; wherein a single first connecting portion and a corresponding single second connecting portion together form a connecting unit, the connecting unit is formed by integrally bending and is L-shaped; the two connecting units are combined such that the two first connecting portions are parallel to each other and spaced apart, and the two second connecting portions are arranged adjacent to each other, so that the overall configuration of the connecting member is configured as an inverted T-shape.

[0015] An embodiment of the present utility model also provides an electricity meter, comprising the load switch described in any of the above embodiments.

[0016] The beneficial effects of the load switch and the electricity meter according to the embodiment of the present utility model include, for example: The load switch comprises a stationary contact, a movable contact and a pushing member, wherein the movable contact is arranged opposite to the stationary contact; a connecting member is provided on a side of the movable contact facing away from the stationary contact; the pushing member is configured to drive the movable contact to rotate, so that the movable contact and the stationary contact are closed or separated; wherein the connecting member is in an inverted T-shape, and the connecting member comprises a first connecting portion and a second connecting portion which are connected at an angle to each other; the first connecting portion is connected with the movable contact; the second connecting portion is connected with the pushing member. By providing the inverted T-shaped connecting member, the movable contact can achieve balanced force when contacting the stationary contact, can adaptively adjust to contact with the stationary contact, which effectively disperses stress, thereby improving the service life and operation reliability of the load switch. Description of Drawings

[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 This is a schematic diagram of a load switch from a first-view perspective provided in an embodiment of this utility model; Figure 2 This is a schematic diagram of the load switch from a second perspective provided in an embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the cooperation between the moving contact and the connector provided in an embodiment of this utility model; Figure 4 This is a schematic diagram of the connector provided in an embodiment of the present utility model.

[0019] Icons: 1000-Load switch; 100-Stationary contact; 200-Moving contact; 210-First moving contact; 220-Second moving contact; 300-Push member; 400-Connector; 410-First connecting part; 420-Second connecting part; 421-Mounting hole; 500-Housing. 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 if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during 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, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0025] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0026] Load switches, as key electrical control and protection devices, are widely used in meters, power distribution systems, and various electrical equipment. Their core function is to safely and reliably connect and disconnect normal load current. Load switches can interrupt rated load current and a certain overload current by the contact or separation of their internal moving and stationary contacts, thus achieving the closing or opening of the switch. However, existing load switches require high operating force and have slow closing and opening speeds. Furthermore, a huge impact force is generated at the moment the moving and stationary contacts close, causing stress concentration in existing load switches, which limits their mechanical lifespan and reliability.

[0027] Based on this, please refer to Figures 1-3 The load switch 1000 provided in the embodiments of this utility model can effectively improve the aforementioned technical problems. The load switch 1000 can disperse the stress when the moving contact 200 closes, thus improving the service life and reliability of the load switch 1000. This load switch 1000 is applied to electricity meters, and all devices with this load switch 1000 have the same functions as described above, which will not be elaborated further here.

[0028] The electricity meter in this embodiment includes a load switch 1000, which is used to switch the power supply circuit in the electricity meter on and off.

[0029] Figure 1 This is a schematic diagram of the load switch 1000 provided in an embodiment of the present invention from a first-view perspective; Figure 2 This is a schematic diagram of the load switch 1000 provided in an embodiment of the present invention from a second perspective. Figure 3 This is a schematic diagram showing the cooperation between the moving contact 200 and the connector 400 provided in an embodiment of this utility model; Figure 4 This is a schematic diagram of the connector 400 provided in an embodiment of the present utility model.

[0030] Please see Figure 1 , Figure 2 and Figure 3 and combined Figure 4 In this embodiment, the load switch 1000 includes a stationary contact 100, a moving contact 200, and a pusher 300. The moving contact 200 is disposed opposite to the stationary contact 100. A connector 400 is disposed on the side of the moving contact 200 away from the stationary contact 100. The pusher 300 is used to drive the moving contact 200 to rotate, so that the moving contact 200 and the stationary contact 100 engage or disengage. The connector 400 is U-shaped and includes a first connecting portion 410 and a second connecting portion 420 that are connected at an angle to each other. The first connecting portion 410 is connected to the moving contact 200, and the second connecting portion 420 is connected to the pusher 300. By setting the U-shaped connector 400, the lever arm of the pusher 300 is extended. According to the lever principle (torque = force x lever arm), when the same torque needs to be output (to drive the moving contact 200), increasing the lever arm can significantly reduce the required operating force, making the design of the pusher 300 lighter and more economical. Furthermore, a smaller operating force means that the pusher 300 can accelerate the moving contact 200 more quickly, allowing the contact to complete the opening or closing action at a faster speed. Rapid opening and closing is crucial for extinguishing the arc and reducing contact burn-out. In addition, the moving contact 200 is subjected to a huge impact force at the moment of closing. The "T"-shaped connector 400 can effectively transmit and distribute the thrust of the pusher 300 to a larger area of ​​the moving contact 200 through the second connection part 420, avoiding stress concentration at a single point, dispersing stress, and improving the service life and reliability of the load switch 1000. Furthermore, the "T"-shaped connector 400 itself has excellent resistance to bending deformation, capable of withstanding the reverse force from the stationary contact 100 when the circuit is closed. This ensures that the moving contact 200 will not deform or be damaged due to excessive force, and allows the moving contact 200 to achieve force balance when contacting the stationary contact 100. It can also adaptively adjust its contact with the stationary contact 100, thereby improving the mechanical life and operational reliability of the entire load switch 1000. The pusher 300 is rotatably connected to the moving contact 200 via the connector 400, which also ensures the stability of the moving contact 200's trajectory and the reliability of the contact between the moving contact 200 and the stationary contact 100.

[0031] The aforementioned "connector 400 includes a first connecting portion 410 and a second connecting portion 420 connected at an angle to each other." Specifically, in this embodiment, the first connecting portion 410 and the second connecting portion 420 are perpendicularly connected. This perpendicular connection creates the most direct and simple coupling relationship between the pushing force and the direction of movement of the second connecting portion 420, driving the second connecting portion 420 and subsequently rotating the moving contact 200. This ensures that the moving contact 200 is balanced by forces, enabling stable contact with the stationary contact 100 and maintaining the stability of its trajectory. At the moment the contacts close, a huge impact force is transmitted to the second connecting portion 420 through the moving contact 200. Since the first connecting portion 410 and the second connecting portion 420 are perpendicular, this impact force can be smoothly transmitted to the first connecting portion 410 and the pushing member 300 through this robust right-angle structure. The right-angle structure effectively disperses the impact force, avoiding stress concentration at the connection point, thereby reducing fatigue damage and improving overall mechanical life. This design also reduces the required driving force.

[0032] Please continue reading. Figure 1 , Figure 2 and Figure 3 and combined Figure 4 In this embodiment, the second connecting portion 420 has a mounting hole 421, through which the push rod of the push member 300 passes to be movably connected with the second connecting portion 420. The design of the push rod passing through the mounting hole 421 allows impact forces to be partially absorbed and released within the mating clearance, rather than rigidly and directly impacting the push rod and its rear precision operating mechanism, thus buffering and protecting the core drive components. Furthermore, this simplifies the assembly process. Of course, the push member 300 can also be welded, threaded, or connected to the second connecting portion 420 in other ways, which is not limited here.

[0033] Furthermore, in this embodiment, the connector 400 is located at the movable end of the moving contact 200, and the mounting hole 421 is located above the moving contact point of the moving contact 200. The driving force acts directly on the movable end that needs to move, resulting in a short force transmission path, reducing energy loss. The direct force transmission also improves the synchronization rate between the action of the pusher 300 and the moving contact 200, leading to a faster response and improved control precision. Additionally, when the contacts close, the impact force is generated at the moving contact 200 point on the movable end. This impact force is transmitted to the rotating shaft through the moving contact 200 itself. Since the connector 400 is located at the movable end, the connector 400 and the contact share and disperse this impact force, preventing stress from being concentrated only at the contact root or the rotating shaft. This makes the stress on the entire moving contact 200 more uniform, thereby reducing fatigue damage and improving mechanical life.

[0034] Of course, the connector 400 may also be located in the middle of the moving contact 200 or near the movable end of the moving contact 200, and this is not limited. For example, the moving contact 200 may have a slot in the middle, and the second connector 420 may protrude from the slot.

[0035] For easy installation and removal of connector 400, please refer to [link / reference]. Figures 1-3 In this embodiment, the first connecting portion 410 is detachably connected to the moving contact 200. Specifically, the first connecting portion 410 and the moving contact 200 are connected by threaded fasteners. The first connecting portion 410 has a connecting hole, through which the threaded fastener passes to the moving contact 200, thereby fixing the first connecting portion 410 and the moving contact 200. Of course, the first connecting portion 410 and the moving contact 200 can also be connected by other detachable methods such as plug-in or snap-fit ​​connections, which are not limited here. The first connecting portion 410 can also be welded to the moving contact 200, or connected by other fixed connection methods such as adhesive bonding, which are not limited here.

[0036] Furthermore, there are two first connecting portions 410, which are parallel and spaced apart along the width direction of the moving contact 200. A second connecting portion 420 is located between the two first connecting portions 410 and connects them. This design ensures that the moving contact 200 is subjected to balanced force in the width direction and will not tilt.

[0037] Please see Figures 1-3 and combined Figure 4 In this embodiment, the moving contact 200 is provided with double contacts, which can reduce the contact resistance of the load switch 1000. The force of the push rod is transmitted to the contact point through the connector 400, which can ensure that at least three areas on the double contacts will be in contact, and the contact point will self-adapt and stabilize, thereby reducing the contact resistance.

[0038] Please continue reading. Figures 1-3, in this embodiment, the first moving contact 210 and the second moving contact 220 are arranged at intervals on the moving contact 200, and the connecting member 400 is located between the first moving contact 210 and the second moving contact 220. The driving force applied by the pushing member 300 through the connecting member 400 acts on the exact center between the two contacts. This allows the driving force and contact pressure to be evenly distributed to the two contacts, ensuring that the first moving contact 210 and the second moving contact 220 can contact or separate from the stationary contact 100 simultaneously, avoiding the situation where a single contact bears all the impact force after contacting first, thereby eliminating eccentric wear caused by uneven force. In addition, by arranging the connecting member 400 between the two moving contacts, the dual-contact design combined with center driving forms a stable symmetrical structure, which can more effectively resist the electric repulsion generated between the contacts, and prevent the contact from accelerating arc erosion due to premature separation caused by the repulsion. Furthermore, by providing a plurality of moving contacts, current can flow through a plurality of parallel paths, and the plurality of contacts equivalent to分摊 the total current to each contact, thereby reducing the current that each contact needs to carry. Contact resistance is related to contact pressure and contact area, and a plurality of contacts greatly increase the total contact area, thereby significantly reducing the overall contact resistance and heat generation. When the switch needs to cut off a fault current (such as a short-circuit current), a strong arc will be generated at the moment the contacts separate; a plurality of contacts mean that the arc will be simultaneously stretched and divided at a plurality of breaking points. The total arc energy is distributed to a plurality of smaller arcs, and each small arc has lower energy and is easier to extinguish, which improves the breaking capacity.

[0039] In order to reduce the space required in the width direction of the moving contact 200 and save space in the width direction, in this embodiment, the first moving contact 210 and the second moving contact 220 are arranged at intervals along the length direction of the moving contact 200. Of course, the first moving contact 210 and the second moving contact 220 can also be arranged at intervals along other directions, which is determined according to actual use requirements and is not limited herein.

[0040] In order to improve the reliability and mechanical strength of the connecting member 400, the connecting member 400 in this embodiment is formed by integral bending. Of course, the first connecting portion 410 and the second connecting portion 420 of the connecting member 400 can also be manufactured separately, and then connected together by welding or other methods. Specifically, in order to reduce production costs, in this embodiment, the connecting member 400 includes two first connecting portions 410 and two second connecting portions 420, and the two first connecting portions 410 and the two second connecting portions 420 are arranged in one-to-one correspondence; wherein, a single first connecting portion 410 and a corresponding single second connecting portion 420 together form a connecting unit, the connecting unit is formed by integral bending and is L-shaped; the combination of the two connecting units makes the two first connecting portions 410 parallel to each other and spaced apart, and the two second connecting portions 420 are located between the two first connecting portions 410 and arranged adjacent to each other, so that the overall configuration of the connecting member 400 is configured as an "丄" shape.

[0041] Please see Figure 1 and Figure 2 In this embodiment, the load switch 1000 also includes a housing 500, and the stationary contact 100, the moving contact 200, and the pusher 300 are all disposed within the housing 500. The stationary contact 100 is fixedly connected to the housing 500. In summary, the load switch 1000 includes a stationary contact 100, a moving contact 200, and a pusher 300. The moving contact 200 is disposed opposite to the stationary contact 100. A connector 400 is disposed on the side of the moving contact 200 away from the stationary contact 100. The pusher 300 is used to drive the moving contact 200 to rotate, so that the moving contact 200 and the stationary contact 100 can engage or disengage. The connector 400 is U-shaped and includes a first connecting part 410 and a second connecting part 420 that are connected at an angle to each other. The first connecting part 410 is connected to the moving contact 200, and the second connecting part 420 is connected to the pusher 300. By setting the U-shaped connector 400, the lever arm of the pusher 300 is extended, thereby reducing the required operating force, so that the contact can complete the opening or closing action at a faster speed. The moving contact 200 experiences a tremendous impact force upon closing. The "T"-shaped connector 400 effectively transmits and distributes the thrust of the pusher 300 over a larger area of ​​the moving contact 200, preventing stress concentration at a single point. This stress dispersion allows the moving contact 200 to achieve balanced force when contacting the stationary contact 100 and enables adaptive adjustment to maintain contact with the stationary contact 100, thus improving the service life and operational reliability of the load switch 1000. Furthermore, the rotatable connection between the pusher 300 and the moving contact 200 via the connector 400 ensures the stability of the moving contact 200's trajectory and guarantees reliable contact between the moving contact 200 and the stationary contact 100.

[0042] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A load switch, characterized in that, Comprising: a stationary contact (100); a movable contact (200), wherein the movable contact (200) is arranged opposite to the stationary contact (100); a connecting member (400) is provided on a side of the movable contact (200) facing away from the stationary contact (100); a pushing member (300), wherein the pushing member (300) is configured to drive the movable contact (200) to rotate, so that the movable contact (200) and the stationary contact (100) are closed or separated; wherein the connecting member (400) is in an inverted T shape, the connecting member (400) comprises a first connecting part (410) and a second connecting part (420) which are connected at an angle to each other; the first connecting part (410) is connected to the movable contact (200); and the second connecting part (420) is connected to the pushing member (300).

2. The load switch according to claim 1, characterized in that, the second connecting part (420) is provided with a mounting hole (421), and a pushing rod of the pushing member (300) passes through the mounting hole (421) to be movably connected with the second connecting part (420).

3. The load switch according to claim 2, characterized in that, the connecting member (400) is located at a movable end of the movable contact (200), and the mounting hole (421) is located above a movable contact of the movable contact (200).

4. The load switch according to claim 1, characterized in that, the first connecting part (410) is detachably connected to the movable contact (200).

5. The load switch according to claim 1, characterized in that, the number of the first connecting parts (410) is two, the two first connecting parts (410) are parallel and arranged at intervals along a width direction of the movable contact (200), and the second connecting part (420) is located between and connects the two first connecting parts (410).

6. The load switch according to claim 1, characterized in that, the first connecting part (410) is perpendicularly connected to the second connecting part (420).

7. The load switch according to claim 1, characterized in that, the movable contact (200) is provided with a first movable contact (210) and a second movable contact (220) at intervals, and the connecting member (400) is located between the first movable contact (210) and the second movable contact (220).

8. The load switch according to claim 7, characterized in that, the first movable contact (210) and the second movable contact (220) are arranged at intervals along a length direction of the movable contact (200).

9. The load switch according to any one of claims 1-8, characterized in that, the connecting member (400) comprises two first connecting parts (410) and two second connecting parts (420), and the two first connecting parts (410) and the two second connecting parts (420) are arranged in one-to-one correspondence; wherein a single first connecting part (410) and a corresponding single second connecting part (420) together form a connecting unit, the connecting unit is formed by integral bending and is L-shaped; the two connecting units are combined such that the two first connecting parts (410) are parallel to each other and spaced apart, and the two second connecting parts (420) are arranged adjacent to each other, so that an overall configuration of the connecting member (400) is configured as an inverted T shape.

10. An electricity meter, characterized in that, comprising the load switch (1000) according to any one of claims 1 to 9.

Images