Load switch and electricity meter

Abstract

The invention discloses a load switch and an ammeter, and relates to the technical field of low-voltage apparatuses. The load switch comprises a pushing system, a contact system and a wiring end assembly which are sequentially arranged along a first direction, the contact system comprises a moving contact and a static contact, the wiring end assembly comprises a moving contact wiring end and a static contact wiring end which are sequentially arranged along a second direction, the moving contact wiring end is connected with the moving contact, the static contact wiring end is connected with the static contact, and the moving contact wiring end is connected with the static contact. The first end of the moving contact is fixed relative to the fixed contact, the second end of the moving contact moves relative to the first end, the second end is provided with a moving contact, the fixed contact is provided with a fixed contact, the fixed contact is located on the side, close to the pushing system, of the moving contact, and the pushing system is used for driving the moving contact to move so that the moving contact can be combined with or separated from the fixed contact. The load switch can solve the problems of large assembly space occupation and poor applicability caused by unreasonable layout of the load switch in the prior art.

Description

Technical Field

[0001] This application relates to the technical field of low-voltage electrical appliances, and more particularly, to a load switch and an electric meter. Background Art

[0002] A load switch generally includes components such as a moving spring, a moving contact, a moving magnetic conductor, a static spring, a static contact, and a static magnetic conductor. Among them, when the moving contact and the static contact are conducting, a magnetic attraction force is generated between the moving magnetic conductor and the static magnetic conductor and acts on the moving spring, which is beneficial to maintaining the closed state of the moving contact and the static contact.

[0003] In the existing load switches, in order to provide a larger contact gap, a layout method in which an armature assembly, a rotating member, and a contact system are arranged in sequence in the same direction is usually adopted. This layout method will result in a larger size in the arrangement direction and occupy a larger assembly space. Without layout or structural adjustment of other components in electrical appliances such as electric meters, it is very difficult to use such a load switch. Therefore, there is an urgent need for a load switch product with a more reasonable layout, less occupied assembly space, and better applicability. Summary of the Invention

[0004] The purpose of this application is to provide a load switch and an electric meter, which can solve the problems that the load switch in the existing technology occupies a large assembly space and has poor applicability due to unreasonable layout.

[0005] The embodiments of this application are implemented as follows:

[0006] In the first aspect of the embodiments of this application, a load switch is provided, which includes a pushing system, a contact system, and a terminal assembly arranged in sequence along a first direction. The contact system includes a moving contact and a static contact. The terminal assembly includes a moving contact terminal and a static contact terminal arranged in sequence along a second direction perpendicular to the first direction. The moving contact terminal is connected to the moving contact, and the static contact terminal is connected to the static contact. The first end of the moving contact is fixed in relative position to the static contact, the second end of the moving contact is movable relative to the first end of the moving contact, a moving contact point is provided on the second end of the moving contact, a static contact point is provided on the static contact, and the static contact point is located on the side of the moving contact point close to the pushing system. The pushing system is used to drive the moving contact to move so that the moving contact point and the static contact point are closed or separated. This load switch can solve the problems that the load switch in the existing technology occupies a large assembly space and has poor applicability due to unreasonable layout.

[0007] As an implementable manner, the closing direction of the moving contact point and the static contact point is parallel to the first direction, or there is an included angle between the closing direction of the moving contact point and the static contact point and the first direction.

[0008] As an implementable manner, on one side of the moving contact where the moving contact is disposed, a connecting member is further disposed. The connecting member is used to connect the pushing system and the moving contact to drive the moving contact to open and close.

[0009] As an implementable manner, the connection point between the pushing system and the moving contact is located on one side of the first end of the moving contact away from the moving contact, or the connection point between the pushing system and the moving contact is located on one side of the first end of the moving contact close to the moving contact.

[0010] As an implementable manner, the contact system further includes a static contact lead-out piece. The static contact lead-out piece includes a first lead-out section and a second lead-out section. The static contact, the first lead-out section, the second lead-out section, and the static contact terminal are connected in sequence. The static contact extends along a third direction perpendicular to both the first direction and the second direction. The first lead-out section is located on the first side of the moving contact along the third direction. The static contact terminal extends along the first direction; wherein, the second lead-out section extends along the second direction, or the second lead-out section extends along the third direction.

[0011] As an implementable manner, the contact system further includes a third lead-out section. The static contact is connected to the static contact terminal through the third lead-out section. The static contact extends along the second direction. The third lead-out section and the static contact terminal both extend along the first direction. The third lead-out section is located on one side of the first end of the moving contact away from the moving contact along the second direction.

[0012] As an implementable manner, the contact system further includes a moving contact lead-out piece. The moving contact lead-out piece includes a first section, a second section, and a third section connected in sequence. The first section is connected to the first end of the moving contact through a flexible member. The first section and the static contact are located on the same side of the moving contact. The second section extends along the first direction. The third section is connected to the moving contact terminal. When closing, at least part of the moving contact is located between the first section and the third section in the first direction. The current flowing through the first section is in the opposite direction to the current flowing through the third section.

[0013] As an implementable manner, the pushing system includes a magnetic circuit assembly, an armature assembly, and a transmission member. The armature assembly is connected to the moving contact through the transmission member. The magnetic circuit assembly is used to drive the movement of the armature assembly and drive the moving contact to approach or separate from the static contact through the transmission member; wherein, the magnetic circuit assembly includes a coil and a yoke. The axial direction of the coil is parallel to the first direction, or the axial direction of the coil is parallel to the second direction.

[0014] As an implementable manner, a connecting member is further provided on one side of the moving contact head where the moving contact is disposed. The first end of the transmission member is hinged to the connecting member, and the second end is movably connected to the armature assembly to provide an overtravel for the moving contact head.

[0015] As an implementable manner, the number of the moving contact and the static contact is one each. The second end of the moving contact head is driven by the transmission member to rotate relative to the first end of the moving contact head, so that the second end of the moving contact head approaches or separates from the static contact head.

[0016] As an implementable manner, the contact system further includes at least one magnetic enhancement member, and the magnetic enhancement member is used to strengthen the contact pressure between the moving contact head and the static contact head.

[0017] As an implementable manner, when the number of the magnetic enhancement members is one, the magnetic enhancement member is located on one side of the moving contact head along the first direction, or the magnetic enhancement member is located on one side of the moving contact head along a third direction perpendicular to both the first direction and the second direction.

[0018] As an implementable manner, when the number of the magnetic enhancement members is two, the two magnetic enhancement members are respectively located on opposite sides of the moving contact head along the first direction, or the two magnetic enhancement members are respectively located on opposite sides of the moving contact head along a third direction perpendicular to both the first direction and the second direction.

[0019] As an implementable manner, an arc extinguishing assembly is further included. The arc extinguishing assembly is disposed on the second side of the moving contact head along a third direction perpendicular to both the first direction and the second direction, and / or on one side of the first end of the moving contact head along the second direction.

[0020] In the second aspect of the embodiments of the present application, an electric meter is provided, including the above-mentioned load switch. This load switch can solve the problems in the prior art that the load switch has a large occupied assembly space and poor applicability due to unreasonable layout.

[0021] The beneficial effects of the embodiments of the present application include:

[0022] The load switch includes a pushing system, a contact system, and a terminal assembly arranged in sequence along a first direction. The contact system includes a moving contact and a static contact. The terminal assembly includes a moving contact terminal and a static contact terminal arranged in sequence along a second direction perpendicular to the first direction. The moving contact terminal is connected to the moving contact, and the static contact terminal is connected to the static contact. The first end of the moving contact is fixed in relative position to the static contact, and the second end of the moving contact is movable relative to the first end of the moving contact. A moving contact point is provided on the second end of the moving contact, and a static contact point is provided on the static contact. The static contact point is located on the side of the moving contact point close to the pushing system. The pushing system is used to drive the moving contact to move so that the moving contact point and the static contact point are brought into contact or separated. For the load switch provided in this application, by reasonably arranging the positional relationship of the pushing system, the contact system, and the terminal assembly, and arranging them along two mutually perpendicular directions (i.e., the first direction and the second direction), the distribution of each component in space is made more compact. Compared with the layout method of arranging in sequence along the same direction in the prior art, the layout method provided in this application effectively utilizes the internal space of the load switch, avoids space waste, and thus reduces the occupation of the assembly space. Through the compact layout of each component inside the load switch, the load switch provided in this application can be applied to different application scenarios. Especially in the case of limited space, it can be more easily installed and used. For example, in some electronic devices or electrical systems with strict requirements on the volume of equipment, the load switch provided in this application can better adapt to the limitation of its internal space without being unable to be installed due to excessive volume or affecting the normal operation of other components. Therefore, this load switch has a wider applicability in different environments and devices and can meet the needs of more users. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of this application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 FIG. 1 is one of the structural schematic diagrams of the load switch provided in the first embodiment of this application;

[0025] Figure 2 FIG. 2 is another structural schematic diagram of the load switch provided in the first embodiment of this application;

[0026] Figure 3 FIG. 3 is a third structural schematic diagram of the load switch provided in the first embodiment of this application;

[0027] Figure 4 FIG. 4 is a structural schematic diagram of the contact system and the terminal assembly provided in the first embodiment of this application;

[0028] Figure 5 Structural schematic diagram of the moving contact and the moving contact terminal provided in the first embodiment of the present application;

[0029] Figure 6 Structural schematic diagram of the static contact and the static contact terminal provided in the first embodiment of the present application;

[0030] Figure 7 Structural schematic diagram of the contact system and the arc extinguishing component provided in the first embodiment of the present application;

[0031] Figure 8 One of the structural schematic diagrams of the load switch provided in the second embodiment of the present application;

[0032] Figure 9 Another structural schematic diagram of the load switch provided in the second embodiment of the present application;

[0033] Figure 10 Structural schematic diagram of the load switch provided in the third embodiment of the present application;

[0034] Figure 11 Structural schematic diagram of the load switch provided in the fourth embodiment of the present application.

[0035] Icon: 100 - load switch; 10 - pushing system; 11 - magnetic circuit component; 111 - coil; 112 - yoke; 12 - armature component; 13 - transmission part; 20 - contact system; 21 - moving contact; 211 - moving contact point; 212 - connecting piece; 213 - first section; 214 - second section; 215 - third section; 22 - static contact; 221 - static contact point; 222 - first lead-out section; 223 - second lead-out section; 224 - third lead-out section; 23 - magnetic enhancement part; 30 - terminal component; 31 - moving contact terminal; 32 - static contact terminal; 90 - arc extinguishing component; y - first direction; x - second direction; z - third direction. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0037] Accordingly, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0038] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

[0039] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical", etc. do not mean that the components are required to be absolutely horizontal or hanging vertically, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0041] In the description of the present application, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the connection inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] Please refer to Figures 1 to 11, an embodiment of the present application provides a load switch 100, which includes a pushing system 10, a contact system 20, and a terminal assembly 30 arranged in sequence along the first direction y. The contact system 20 includes a moving contact 21 and a static contact 22. The terminal assembly 30 includes a moving contact terminal 31 and a static contact terminal 32 arranged in sequence along the second direction x perpendicular to the first direction y. The moving contact terminal 31 is connected to the moving contact 21, and the static contact terminal 32 is connected to the static contact 22. The relative position of the first end of the moving contact 21 and the static contact 22 is fixed. The second end of the moving contact 21 is movable relative to the first end of the moving contact 21. A moving contact point 211 is provided on the second end of the moving contact 21, and a static contact point 221 is provided on the static contact 22. The static contact point 221 is located on the side of the moving contact point 211 close to the pushing system 10. The pushing system 10 is used to drive the moving contact 21 to move, so that the moving contact point 211 and the static contact point 221 are engaged or separated. This load switch 100 can solve the problems of large occupied assembly space and poor applicability caused by unreasonable layout in the existing load switch 100.

[0043] It should be noted that, as Figure 1 , Figure 8 , Figure 10 and Figure 11 shown, this load switch 100 includes a pushing system 10, a contact system 20, and a terminal assembly 30, and the pushing system 10, the contact system 20, and the terminal assembly 30 are arranged in sequence along the first direction y. Among them, the contact system 20 includes a moving contact 21 and a static contact 22, and the terminal assembly 30 includes a moving contact terminal 31 and a static contact terminal 32. Moreover, the moving contact terminal 31 and the static contact terminal 32 are arranged in sequence along the second direction x. The above-mentioned first direction y and the second direction x are perpendicular to each other.

[0044] On this basis, the moving contact terminal 31 is connected to the moving contact 21, and the static contact terminal 32 is connected to the static contact 22. The relative position of the first end of the moving contact 21 and the static contact 22 is fixed, that is, there is no relative movement between the first end of the moving contact 21 and the static contact 22. The second end of the moving contact 21 is movable relative to the first end of the moving contact 21, so that the second end of the moving contact 21 can rotate around its first end. A moving contact point 211 is provided on the second end of the moving contact 21, and a static contact point 221 is provided on the static contact 22. The static contact point 221 is located on the side of the moving contact point 211 close to the pushing system 10. This layout design can reduce the width in the second direction x, make the spatial layout of the load switch 100 more reasonable, the structure more compact, effectively reduce the occupied space, and can cooperate better with other components. The pushing system 10 is used to drive the moving contact 21 to move, so that the moving contact point 211 and the static contact point 221 are engaged or separated, thereby correspondingly realizing the closing and opening operations.

[0045] The load switch 100 provided by this application arranges the positional relationship of the driving system 10, the contact system 20, and the terminal assembly 30 reasonably, and is laid out along two mutually perpendicular directions (i.e., the first direction y and the second direction x), so that the distribution of each component in space is more compact. Compared with the layout method in the prior art where components are arranged in sequence along the same direction, the layout method provided by this application effectively utilizes the internal space of the load switch 100, avoids space waste, and thus reduces the occupation of the assembly space. At the same time, the static contact 221 is located on the side of the moving contact 211 close to the driving system 10, and the driving system 10, the contact system 20, and the terminal assembly 30 are arranged in sequence along the first direction y, which is beneficial to enhancing the contact pressure between the moving contact 211 and the static contact 221.

[0046] Through the compact layout of each component inside the load switch 100, the load switch 100 provided by this application can be applied to different application scenarios. Especially in the case of limited space, it can be more easily installed and used. For example, in some electronic devices or electrical systems with strict requirements on the equipment volume, the load switch 100 provided by this application can better adapt to the limitation of its internal space, and will not be unable to be installed due to excessive volume or affect the normal operation of other components. Therefore, the load switch 100 has a wider applicability in different environments and devices, and can meet the needs of more users.

[0047] As an implementable manner, as Figures 8 to 11 shown, in some embodiments, the closing direction of the moving contact 211 and the static contact 221 is parallel to the first direction y. Or, as Figures 1 to 7 shown, in some other embodiments, there is an included angle between the closing direction of the moving contact 211 and the static contact 221 and the first direction y.

[0048] It should be noted that, as Figures 8 to 11 shown, in some embodiments, the closing direction of the moving contact 211 and the static contact 221 being parallel to the first direction y means that after the moving contact 21 is subjected to the driving force of the driving system 10, it moves approximately along the first direction y as a whole, so that the moving contact 211 can directly achieve closing and separation with the static contact 221 approximately parallel to the first direction y. This design of the closing direction makes the movement trajectory of the moving contact 21 relatively simple and direct, easy to control and implement. At the same time, it is beneficial to improve the action accuracy and stability of the load switch 100. During each action, the contact position and force between the moving contact 211 and the static contact 221 can be kept relatively consistent, thus ensuring good electrical connection performance. At the same time, the production cost is reduced, and it is beneficial to improve the overall reliability and service life of the load switch 100.

[0049] As Figures 1 to 7As shown, in some other embodiments, there is an included angle between the closing direction of the moving contact 211 and the static contact 221 and the first direction y, which means that after the moving contact 21 is subjected to the driving force of the driving system 10, it moves (approximately) linearly along a direction having a certain included angle with the first direction y, so that the moving contact 211 can directly achieve closing and separation with the static contact 221 in a direction having a certain included angle with the first direction y. This design of the closing direction can increase the flexibility of the design of the load switch 100. By adjusting the size of the included angle, the moving contact 21 can achieve more optimized operating characteristics under different working conditions, such as different currents, voltages or loads. For example, in some occasions where it is necessary to quickly connect or disconnect the circuit, by designing an appropriate included angle, the moving contact 21 can have a higher speed when approaching the static contact 221, and the arm length of the moving contact 21 can be further made longer within a limited space, so as to quickly complete the connection or disconnection of the circuit, reduce the generation and duration of the arc, and improve the arc extinguishing performance and electrical life of the load switch 100. In addition, this design can also adapt to different installation space and layout requirements to a certain extent, improving the applicability of the load switch 100.

[0050] As an implementable manner, as Figures 1 to 11 shown, on the side of the moving contact 21 where the moving contact 211 is provided, a connecting member 212 is further provided. The connecting member 212 is used to connect the driving system 10 and the moving contact 21, so that the driving system 10 can drive the moving contact 21 to close and open through the connecting member 212. The above-mentioned moving contact 21 and the connecting member 212 can be fixed together after being separately manufactured, or can be directly manufactured by integral molding. Exemplarily, in some embodiments, the connecting member 212 is a connecting ear having a connecting hole.

[0051] As an implementable manner, as Figures 1 to 9 shown, in some embodiments, the connection point between the driving system 10 and the moving contact 21 is located on one side of the first end of the moving contact 211 away from the moving contact 21, or, as Figure 10 and Figure 11 shown, in some other embodiments, the connection point between the driving system 10 and the moving contact 21 is located on one side of the first end of the moving contact 211 close to the moving contact 21.

[0052] It should be noted that, as Figures 1 to 9As shown, in some embodiments, the connection point of the pushing system 10 and the moving contact 21 is located on one side of the moving contact point 211 away from the first end of the moving contact 21. In this case, the force arm of the pushing system 10 acting on the moving contact 21 is relatively long. From the perspective of the lever principle, this setting enables the pushing system 10 to generate a larger torque with a smaller force when pushing the moving contact 21, making it easier to drive the movement of the moving contact 21. For example, when the pushing system 10 applies a relatively small force, due to the relatively long distance between the connection point and the rotation center of the moving contact 21 (the first end of the moving contact 21 is relatively fixed and can be regarded as the rotation center), according to the principle that torque is equal to force multiplied by the force arm, a larger torque will be generated, causing the moving contact 21 to rotate around the first end, driving the moving contact point 211 to make contact or separation with the static contact point 221. This setting can reduce the driving force required by the pushing system 10, and the performance requirements for the pushing system 10 are relatively low. Therefore, a pushing device with a smaller power and smaller size can be selected, which is beneficial to reducing the cost and volume of the entire load switch 100. At the same time, the longer force arm can also make the movement of the moving contact 21 smoother and gentler, reducing impact and vibration, which helps to improve the reliability of the contact and separation of the moving and static contact points 221 and extend the service life of the contact.

[0053] As Figure 10 and Figure 11As shown, in some other embodiments, the connection point of the driving system 10 to the moving contact 21 is located on the side of the moving contact point 211 close to the first end of the moving contact 21. In this case, the lever arm of the driving system 10 acting on the moving contact 21 is relatively short. At this time, for the driving system 10 to produce the same movement effect on the moving contact 21, a relatively large force needs to be applied. However, this setting also has its unique features. Since the connection point is relatively close to the rotation center of the moving contact 21 (the first end of the moving contact 21 is relatively fixed and can be regarded as the rotation center), the displacement of the moving contact 21 during movement is relatively small, enabling relatively precise position control. For example, in some occasions where high precision is required for the movement of the moving contact 21, by precisely controlling the acting force of the driving system 10, the moving contact point 211 can be accurately docked with the static contact point 221 to ensure good electrical contact. This setting is conducive to improving the accuracy and precision of the movement of the moving contact 21 and is applicable to occasions with high requirements for electrical performance and precise control of the contact position. For example, in some high-precision power systems or electronic devices, it can ensure that the contact resistance between the moving contact point 211 and the static contact point 221 is stable and small, improving the stability and reliability of the circuit. In addition, the shorter lever arm enables the moving contact 21 to have a faster movement response speed. In the case of quickly cutting off or connecting the circuit, it can complete the action more quickly, which helps to improve the breaking capacity and response performance of the load switch 100. At the same time, the connection point of the driving system 10 to the moving contact 21 being located on the side of the moving contact point 211 close to the first end of the moving contact 21 can greatly reduce the ablation of the connecting member 212 by the arc generated when the moving contact 21 opens relative to the static contact 22, improving the reliability of the system.

[0054] As an implementable manner, as Figures 1 to 9 shown, in some embodiments, the contact system 20 further includes a static contact lead-out piece, which includes a first lead-out section 222 and a second lead-out section 223. The static contact 22, the first lead-out section 222, the second lead-out section 223, and the static contact terminal 32 are connected in sequence. The static contact 22 extends along a third direction z perpendicular to both the first direction y and the second direction x. The first lead-out section 222 is located on the first side of the moving contact 21 along the third direction z. The static contact terminal 32 extends along the first direction y.

[0055] It should be noted that as Figures 1 to 9As shown, in some embodiments, the static contact 22 extends along a third direction z that is perpendicular to both the first direction y and the second direction x. This means that the static contact 22 is in a specific position and orientation in space, perpendicular to the layout of other components, forming a three-dimensional spatial layout that can make full use of the space of the housing in the third direction z. Secondly, it is convenient to set the connection point between the driving system 10 and the moving contact 21 on one side of the first end of the moving contact point 211 away from the moving contact 21 in some embodiments to avoid interference. For example, the first direction y is the height direction of the load switch 100, the second direction x is the length direction of the load switch 100, and the third direction z is the thickness direction of the load switch 100.

[0056] The static contact lead-out piece includes a first lead-out section 222 and a second lead-out section 223. It is connected to the static contact 22 through the first lead-out section 222 and at the same time connected to the static contact terminal 32 through the second lead-out section 223. Moreover, the first lead-out section 222 is located on the first side of the moving contact 21 along the third direction z. For example, the first lead-out section 222 is located on the side of the moving contact 21 along the third direction z close to the top cover of the load switch 100. Through a certain turning or transition of the second lead-out section 223, it is finally connected to other external circuits or devices through the static contact terminal 32 to form a complete circuit path.

[0057] This design makes full use of the three-dimensional space, making the layout of the static contact 22, the static contact lead-out piece, and the static contact terminal 32 more compact and reasonable. By extending the static contact 22 along the third direction z, it avoids occupying too much space in the first direction y and the second direction x, effectively reducing the overall volume of the load switch 100 and improving the space utilization rate. For example, in some electrical equipment or distribution boxes with limited space, this compact layout can better adapt to the installation environment and make the overall structure of the equipment more concise and compact.

[0058] The reasonable spatial layout and the design of the static contact terminal 32 contribute to improving the electrical performance. Since the layout of the static contact 22, the static contact lead-out piece, and the static contact terminal 32 is more reasonable, the electric field distribution is more uniform, reducing the possibility of electric field distortion and partial discharge, thereby improving the insulation performance and voltage withstand capacity of the load switch 100. At the same time, the good electrical connection also helps to reduce the contact resistance, reduce heat generation, and improve the stability and reliability of the load switch 100 during operation.

[0059] In addition, the overall length of the static contact lead-out piece (i.e., the first lead-out section 222 and the second lead-out section 223) along the first direction y is relatively long, which can make the magnetic field generated by the current passing through the static contact lead-out piece exert a force on the moving contact 21 towards the static contact 22, thus helping to strengthen the contact pressure between the moving contact 21 and the static contact 22 to ensure stable contact when the moving contact 21 and the static contact 22 are closed.

[0060] As an implementable mode, as Figure 8 and Figure 9 shown, in the second embodiment, the second lead segment 223 extends along the second direction x, so that the static contact terminal 32 forms an approximate "Z" - shaped structure in three - dimensional space, which can perform reasonable wiring in the space near the moving contact 21 and the static contact 22, realizing the transition connection from the static contact 22 to the static contact terminal 32 in different directions; or, as Figures 1 to 7 shown, in the first embodiment, the second lead segment 223 extends along the third direction z, so that the static contact terminal 32 forms an approximate "L" - shaped structure in three - dimensional space, which can perform reasonable wiring in the space near the moving contact 21 and the static contact 22, realizing the transition connection from the static contact 22 to the static contact terminal 32 in different directions. Regarding the actual extension direction of the second lead segment 223, those skilled in the art can make a reasonable design according to the layout of the static contact terminal 32, and no specific limitation is made here.

[0061] As an implementable mode, as Figure 10 and Figure 11 shown, in some other embodiments, the contact system 20 further includes a third lead segment 224. The static contact 22 is connected to the static contact terminal 32 through the third lead segment 224. The static contact 22 extends along the second direction x, both the third lead segment 224 and the static contact terminal 32 extend along the first direction y, and the third lead segment 224 is located on one side of the moving contact 21 along the second direction x, so as to facilitate connecting the static contact 22 to other external circuits or devices through the static contact terminal 32 to form a complete circuit path. This design can make more reasonable use of space, avoid spatial conflicts between components, reduce unnecessary space occupation, and is conducive to realizing the miniaturized design of the load switch 100, meeting some application scenarios with high space requirements.

[0062] In addition, the overall length of the static contact lead piece (i.e., the third lead segment 224) along the first direction y is relatively long, which can enable the magnetic field generated by the current passing through the static contact lead piece to generate a force on the moving contact 21 towards the static contact 22, thereby being conducive to strengthening the contact pressure between the moving contact 21 and the static contact 22 to ensure stable contact when the moving contact 21 and the static contact 22 are closed.

[0063] As an implementable mode, as Figures 1 to 11As shown, the contact system 20 further includes a moving contact lead piece, which includes a first section 213, a second section 214, and a third section 215 connected in sequence. The first section 213 is connected to the first end of the moving contact 21 through a flexible member (such as a flexible connecting wire) to ensure the reliability and stability of the connection through the flexible member. The first section 213 and the static contact 22 are located on the same side of the moving contact 21. The second section 214 extends along the first direction y, and the third section 215 is connected to the moving contact terminal 31. During closing, at least part of the moving contact 21 is located between the first section 213 and the third section 215 in the first direction y. The current flow direction through the first section 213 is opposite to the current flow direction through the third section 215, which can make the magnetic field generated by the current passing through the first section 213 and the third section 215 generate a force acting on the moving contact 21 towards the static contact 22, thereby preventing the moving contact 21 and the static contact 22 from separating due to repulsive force during abnormal conditions such as short circuits, and ensuring stable contact between the moving contact 21 and the static contact 22, improving the operating stability of the contact system 20 and the tolerance ability to short-circuit current.

[0064] As an implementable embodiment, as Figures 1 to 11 shown, the actuating system 10 includes a magnetic circuit assembly 11, an armature assembly 12, and a transmission member 13. The armature assembly 12 is connected to the moving contact 21 through the transmission member 13. The magnetic circuit assembly 11 is used to drive the armature assembly 12 to move and drive the moving contact 21 to approach or separate from the static contact 22 through the transmission member 13. Among them, the magnetic circuit assembly 11 includes a coil 111 and a yoke 112. After the coil 111 is energized, the magnetic field generated by the magnetic circuit assembly 11 acts on the armature assembly 12, enabling the magnetic circuit assembly 11 to drive the armature assembly 12 to move. Since the armature assembly 12 is connected to the moving contact 21 through the transmission member 13, when the armature assembly 12 moves, it can drive the moving contact 21 to move through the transmission member 13, thereby realizing the opening (disconnecting the circuit) and closing (connecting the circuit) operations with the static contact 22.

[0065] Exemplarily, as Figures 1 to 10 shown, in some embodiments, the axial direction of the coil 111 is parallel to the first direction y, which can enable the actuating system 10 to make full use of the space in the second direction x, making the layout between components more compact. Or, as Figure 11 shown, in the fourth embodiment, the axial direction of the coil 111 is parallel to the second direction x, which can enable the moving contact 21 to move quickly and stably in the first direction y.

[0066] As an implementable embodiment, as Figures 2 to 5 、 Figure 9As shown, on one side of the moving contact 21 where the moving contact point 211 is provided, a connecting member 212 is further provided. The first end of the transmission member 13 is hinged to the connecting member 212, and the second end is movably connected to the armature assembly 12 to provide an overtravel for the moving contact 21. By way of example, in some embodiments, a sliding groove is provided on the side of the armature assembly 12 away from the magnetic circuit assembly 11. The first end of the transmission member 13 is hinged to the connecting member 212, and the second end is movably connected within the sliding groove, so that the second end of the transmission member 13 can move freely within the sliding groove to provide an overtravel for the moving contact 21, thereby realizing the overtravel design. Further, an elastic member can be provided. The elastic member is used between the transmission member 13 and the armature assembly 12 to prevent the transmission member 13 from bouncing and to provide a contact pressure for the moving contact 21.

[0067] As an implementable manner, as Figures 1 to 11 shown, the number of both the moving contact point 211 and the static contact point 221 is one. The second end of the moving contact 21 is driven by the transmission member 13 to rotate relative to the first end of the moving contact 21, so that the second end of the moving contact 21 approaches or moves away from the static contact 22. The present application adopts a single-contact design. Compared with the multi-contact design, the overall design and manufacturing process of the load switch 100 are greatly simplified. The number of components is reduced, and the material cost, processing cost, and assembly cost during the production process are reduced. At the same time, the simplification of the structure also helps to improve the production efficiency, reduce the probability of failures that may be caused by too many components, and improve the reliability and stability of the load switch 100.

[0068] As an implementable manner, as Figures 1 to 3 shown, the contact system 20 further includes at least one magnetic enhancement member 23. The magnetic enhancement member 23 is used to strengthen the contact pressure between the moving contact 21 and the static contact 22 to ensure stable closing of the moving contact 21 and the static contact 22.

[0069] As an implementable manner, when the number of the magnetic enhancement members 23 is one, the magnetic enhancement member 23 is located on one side of the moving contact 21 along the first direction y. For example, the magnetic enhancement member 23 is fixedly provided on the housing, and the magnetic enhancement member 23 is located on the side of the moving contact 21 away from the pushing system 10; or, as Figures 1 to 3 shown, the magnetic enhancement member 23 is located on one side of the moving contact 21 along the third direction z that is perpendicular to both the first direction y and the second direction x. For example, the magnetic enhancement member 23 is fixedly provided on the housing, and the magnetic enhancement member 23 is located on the side of the moving contact 21 along the third direction z close to the base of the load switch 100.

[0070] As an implementable mode, when the number of the magnetic enhancing members 23 is two, the two magnetic enhancing members 23 are respectively located on the opposite sides of the moving contact 21 along the first direction y. For example, one of the magnetic enhancing members 23 is fixedly arranged on the housing, and this magnetic enhancing member 23 is located on the side of the moving contact 21 away from the pushing system 10, and the other magnetic enhancing member 23 is located on the side of the moving contact 21 close to the pushing system 10; or, the two magnetic enhancing members 23 are respectively located on the opposite sides of the moving contact 21 along the third direction z perpendicular to both the first direction y and the second direction x, and the space of the load switch 100 in the third direction z can be further utilized. For example, one of the magnetic enhancing members 23 is fixedly arranged on the housing, and this magnetic enhancing member 23 is located on the side of the moving contact 21 close to the base of the load switch 100 along the third direction z, and the other magnetic enhancing member 23 is located on the side of the moving contact 21 close to the top cover of the load switch 100 along the third direction z.

[0071] Further, when the magnetic enhancing member 23 is arranged on at least one side of the moving contact 21 along the third direction z perpendicular to both the first direction y and the second direction x, at least a partial overlapping range exists between the projection of the magnetic enhancing member 23 along the third direction z and the projections of the moving contact 21 and the first section 213 along the third direction z, so as to further reduce the magnetic resistance between the moving contact 21 and the first section 213 and strengthen the contact pressure between the moving contact 21 and the static contact 22.

[0072] As an implementable mode, as Figures 1 to 11 shown, the load switch 100 further includes an arc extinguishing assembly 90. The main function of the arc extinguishing assembly 90 is to extinguish the generated arc when the moving contact 21 and the static contact 22 are opened, so that the load switch 100 can cut off the circuit faster and more reliably during opening, and improves the circuit breaking ability of the load switch 100. Among them, as Figures 1 to 11 shown, in the above embodiment, the arc extinguishing assembly 90 is arranged on the second side of the moving contact 21 along the third direction z perpendicular to both the first direction y and the second direction x. For example, the arc extinguishing assembly 90 is located on the side of the moving contact 21 close to the base of the load switch 100 along the third direction z, so as to make full use of the space in the third direction z, thereby reducing the size of the load switch 100 product along the second direction x; and / or, the arc extinguishing assembly 90 is arranged on one side of the first end of the moving contact 21 along the second direction x.

[0073] Exemplarily, as Figure 1 shown, the arc extinguishing assembly 90 and the first lead-out section 222 are respectively arranged on both sides of the moving contact 21 along the third direction z and are oppositely arranged. The first lead-out section 222 enables the arc to enter the arc extinguishing assembly 90 more quickly, improving the arc extinguishing performance of the load switch 100.

[0074] Of course, no matter which arrangement is adopted, the arc extinguishing assembly 90 should be arranged near the moving contact 21 and the static contact 22, so as to facilitate the arc extinguishing assembly 90 to extinguish the arc generated when the moving contact 21 and the static contact 22 are opened.

[0075] The embodiment of the present application further provides an ammeter, including the above-mentioned load switch 100. 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.

[0076] The above are only optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0077] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present application will not separately describe various possible combination methods.

Claims

1. A load switch, characterized in that: The invention comprises a driving system (10), a contact system (20) and a terminal assembly (30) arranged in sequence along a first direction (y), wherein the contact system (20) comprises a moving contact (21) and a stationary contact (22), and the terminal assembly (30) comprises a moving contact terminal (31) and a stationary contact terminal (32) arranged in sequence along a second direction (x) perpendicular to the first direction (y), wherein the moving contact terminal (31) is connected to the moving contact (21), and the stationary contact terminal (32) is connected to the stationary contact (22), and the moving contact (21) is The first end is fixed in position relative to the static contact (22); the second end of the moving contact (21) is movable relative to the first end of the moving contact (21); a moving contact (211) is provided on the second end of the moving contact (21); a static contact (221) is provided on the static contact (22); the static contact (221) is located on a side of the moving contact (211) close to the propulsion system (10); the propulsion system (10) is used to drive the moving contact (21) to move so that the moving contact (211) and the static contact (221) are engaged or separated.

2. The load switch according to claim 1, characterized in that: The clap direction of the movable contact (211) and the stationary contact (221) is parallel to the first direction (y), or an angle exists between the clap direction of the movable contact (211) and the stationary contact (221) and the first direction (y).

3. The load switch according to claim 1, characterized in that: A connecting piece (212) is also provided on one side of the moving contact (21) on which the moving contact point (211) is provided. The connecting piece (212) is used to connect the propulsion system (10) with the moving contact (21) so as to drive the moving contact (21) to open or close.

4. The load switch according to claim 3, characterized in that: The connection point between the propulsion system (10) and the moving contact (21) is located on a side of the moving contact (211) away from the first end of the moving contact (21), or the connection point between the propulsion system (10) and the moving contact (21) is located on a side of the moving contact (211) close to the first end of the moving contact (21).

5. The load switch according to claim 1, characterized in that: The contact system (20) also includes a stationary contact lead-out piece, the stationary contact lead-out piece includes a first lead-out section (222) and a second lead-out section (223), the stationary contact (22), the first lead-out section (222), the second lead-out section (223) and the stationary contact terminal (32) are connected in sequence, the stationary contact (22) extends along a third direction (z) perpendicular to both the first direction (y) and the second direction (x), the first lead-out section (222) is located on a first side of the moving contact (21) along the third direction (z), and the stationary contact terminal (32) extends along the first direction (y); wherein the second lead-out section (223) extends along the second direction (x), or the second lead-out section (223) extends along the third direction (z).

6. The load switch according to claim 1, characterized in that: The contact system (20) further comprises a third lead-out section (224), the stationary contact (22) being connected to the stationary contact terminal (32) via the third lead-out section (224), the stationary contact (22) extending along the second direction (x), the third lead-out section (224) and the stationary contact terminal (32) both extending along the first direction (y), and the third lead-out section (224) being located on a side of the moving contact (21) away from the first end of the moving contact (21) along the second direction (x).

7. The load switch according to claim 1, characterized in that: The contact system (20) further comprises a moving contact lead-out piece, the moving contact lead-out piece comprising a first section (213), a second section (214) and a third section (215) connected in sequence, the first section (213) being connected to a first end of the moving contact (21) via a flexible member, the first section (213) and the stationary contact (22) being located on the same side of the moving contact (21), the second section (214) extending along the first direction (y), the third section (215) being connected to the moving contact terminal (31), and when the switch is closed, at least a portion of the moving contact (21) is located between the first section (213) and the third section (215) along the first direction (y), and the current flowing through the first section (213) is opposite to the current flowing through the third section (215).

8. The load switch according to claim 1, characterized in that: The propulsion system (10) comprises a magnetic circuit assembly (11), an armature assembly (12) and a transmission member (13); the armature assembly (12) is connected to the moving contact (21) via the transmission member (13); the magnetic circuit assembly (11) is used to drive the armature assembly (12) to move, and drive the moving contact (21) to approach or move away from the stationary contact (22) via the transmission member (13); wherein the magnetic circuit assembly (11) comprises a coil (111) and a yoke (112); the axial direction of the coil (111) is parallel to the first direction (y), or the axial direction of the coil (111) is parallel to the second direction (x).

9. The load switch according to claim 8, characterized in that: A connecting member (212) is also provided on one side of the moving contact (21) on which the moving contact point (211) is provided, and a first end of the transmission member (13) is hingedly connected to the connecting member (212) and a second end is movably connected to the armature assembly (12) to provide a contact overtravel for the moving contact (21).

10. The load switch according to claim 8, characterized in that: The number of the moving contact (211) and the number of the stationary contact (221) are both one, and the second end of the moving contact (21) is driven by the transmission member (13) to rotate relative to the first end of the moving contact (21), so that the second end of the moving contact (21) approaches or moves away from the stationary contact (22).

11. The load switch according to claim 1, characterized in that: The contact system (20) further comprises at least one magnetizing component (23), wherein the magnetizing component (23) is used to strengthen the contact pressure between the moving contact (21) and the stationary contact (22).

12. The load switch according to claim 11, characterized in that: When the number of the magnetizing component (23) is one, the magnetizing component (23) is located on one side of the moving contact (21) along the first direction (y), or the magnetizing component (23) is located on one side of the moving contact (21) along a third direction (z) perpendicular to both the first direction (y) and the second direction (x).

13. The load switch according to claim 11, characterized in that: When the number of the magnetizing components (23) is two, the two magnetizing components (23) are respectively located on opposite sides of the moving contact (21) along the first direction (y), or the two magnetizing components (23) are respectively located on opposite sides of the moving contact (21) along a third direction (z) perpendicular to both the first direction (y) and the second direction (x).

14. The load switch according to claim 1, characterized in that: It also includes an arc extinguishing assembly (90), which is arranged on the second side of the moving contact (21) along a third direction (z) perpendicular to both the first direction (y) and the second direction (x), and / or is arranged on one side of the first end of the moving contact (21) along the second direction (x).

15. An electric meter, characterized in that: A load switch (100) comprising any one of claims 1 to 14.

Images