Relay and electricity meter

Abstract

The utility model relates to the technical field of electronic control devices, in particular to a relay and an electricity meter, the relay comprises a static contact assembly, a pushing piece, a movable contact assembly and an elastic piece, and the position of the static contact assembly is fixed; the pushing piece reciprocates in the first direction; the movable contact assembly is integrally installed on the pushing piece and is in guide fit with the pushing piece in the first direction, the movable contact assembly has an open position and a closed position, and the movable contact assembly comprises a first movable contact piece and a second movable contact piece which are arranged in the second direction perpendicular to the first direction and can be connected in parallel; the elastic piece acts between the pushing piece and the movable contact assembly in the first direction. At the closing position, the elastic piece deforms to enable the first movable contact piece and the static contact assembly as well as the second movable contact piece and the static contact assembly to form contact pressure; and when moving to the disconnection position, the pushing piece respectively drives the first movable contact piece and the second movable contact piece to be separated in sequence, so that the contact resistance value in the whole loop is reduced, and the contact pressure is ensured to be balanced.

Description

Technical Field

[0001] This utility model relates to the field of electronic control device technology, and more specifically, to a relay and an electricity meter. Background Technology

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. Essentially, a relay is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0003] A magnetic latching relay is a type of relay. The contact part of a magnetic latching relay includes moving contacts and stationary contacts. The moving contacts and stationary contacts are respectively provided with moving contacts and stationary contacts. When there are two or more moving contacts, the cap height of the moving contacts and / or stationary contacts is usually set differently to achieve a gap difference after disconnection and to allow different moving contacts to disconnect in sequence, which is used to control the arc ignition of the fixed contact. However, this solution will lead to an imbalance of the two sets of contact pressure when using the same elastic element, affecting the contact pressure drop, and the production process is not easy to control, affecting production efficiency. Utility Model Content

[0004] This utility model provides a relay and meter that can effectively control the electric arc to concentrate between the second moving contact and the stationary contact assembly, thereby reducing the contact resistance value in the overall circuit. At the same time, it also ensures that when the moving contact assembly contacts the stationary contact assembly, the contact pressure between each moving contact in the moving contact assembly and the stationary contact assembly is balanced.

[0005] The relay provided in this embodiment of the utility model includes:

[0006] The static contact component has a fixed position.

[0007] A pusher component, which is adapted to reciprocate along a first direction;

[0008] A movable contact assembly, integrally mounted on the pusher and guided and engaged with the pusher along a first direction, the movable contact assembly having an open position and a closed position, the movable contact assembly including a first movable contact element and a second movable contact element, the first movable contact element and the second movable contact element being arranged along a second direction perpendicular to the first direction and capable of being connected in parallel; and

[0009] An elastic element that acts between the pusher and the moving contact assembly along the first direction;

[0010] When the moving contact assembly is in the closed position, the elastic element deforms elastically so that the first moving contact element and the stationary contact assembly, as well as the second moving contact element and the stationary contact assembly, all form contact pressure. When the moving contact assembly is in the open position, the contact gap of the first moving contact element is greater than the contact gap of the second moving contact element, so that when the moving contact assembly moves from the closed position to the open position, the pushing element sequentially drives the first moving contact element and the second moving contact element to separate.

[0011] According to some embodiments of the present invention, at least one of the pushing member and the first moving contact member is provided with a protrusion, the protrusion being located between the pushing member and the first moving contact member, so that the contact gap between the first moving contact member and the stationary contact assembly is greater than the contact gap between the second moving contact member and the stationary contact assembly.

[0012] According to some embodiments of the present invention, both the first moving contact and the second moving contact are slidably engaged with the pushing member along the first direction.

[0013] According to some embodiments of the present invention, the pushing member includes a pushing block and a bracket, the pushing block being fixedly connected to the bracket; the bracket is provided with a first slide rail and a second slide rail, the first moving contact member is slidably engaged with the first slide rail, and the second moving contact member is slidably engaged with the second slide rail; when the moving contact component is in the disconnected position, one end of the elastic member abuts against the pushing block, and the other end of the elastic member abuts the moving contact component against the bracket;

[0014] The protrusion is disposed on the bracket; when the first moving contact and the second moving contact are in contact with the stationary contact assembly, the protrusion can separate from the first moving contact; when the pusher moves away from the stationary contact assembly, the protrusion can abut against the first moving contact, so that the contact gap between the first moving contact and the stationary contact assembly is greater than the contact gap between the second moving contact and the stationary contact assembly.

[0015] According to some embodiments of this utility model, the bracket is a U-shaped frame, which includes a horizontal portion and two vertical portions. The two vertical portions are respectively fixed to both ends of the horizontal portion. The horizontal portion is provided with a first slide rail and a second slide rail. The pushing block is fixed to the two vertical portions. The first moving contact member and the second moving contact member are both located between the two vertical portions and slide relative to the first slide rail and the second slide rail, respectively. The protrusion is provided on the vertical portion or the horizontal portion.

[0016] According to some embodiments of the present invention, the protrusion is disposed on the transverse portion and includes a plurality of columnar protrusions, which are spaced apart along the extension direction of the first moving contact member.

[0017] According to some embodiments of the present invention, the relay further includes a first auxiliary engaging component and a second auxiliary engaging component; the first auxiliary engaging component includes a first magnetic conductive element and a second magnetic conductive element; the second auxiliary engaging component includes a third magnetic conductive element and a fourth magnetic conductive element; the first magnetic conductive element and the third magnetic conductive element are respectively fixed to the side of the first moving contact and the second moving contact opposite to the stationary contact component and are respectively slidably engaged with the first slide rail and the second slide rail along a first direction; the second magnetic conductive element and the fourth magnetic conductive element are fixed relative to the stationary contact component and are respectively located on the side of the first moving contact and the second moving contact facing the stationary contact component.

[0018] According to some embodiments of the present invention, the two ends of the elastic member along the first direction are respectively fixedly connected to the pushing block, the first moving contact member, and the second moving contact member.

[0019] According to some embodiments of this utility model, the vertical part is provided with a slot, the push block is provided with a plug-in part, and the plug-in part is limited to the slot so that the push block is fixedly connected to the vertical part.

[0020] According to some embodiments of the present invention, the protrusion is disposed on the side of the first moving contact member facing the stationary contact assembly; when the first moving contact member and the second moving contact member are in contact with the stationary contact assembly, the bracket can separate from the protrusion; when the pushing member moves away from the stationary contact assembly, the bracket can abut against the protrusion, so that the contact gap between the first moving contact member and the stationary contact assembly is greater than the contact gap between the second moving contact member and the stationary contact assembly.

[0021] According to some embodiments of the present invention, the first movable contact and the second movable contact have the same extending direction, and the first movable contact is provided with a first movable contact at both ends along its extending direction, and the second movable contact is provided with a second movable contact at both ends along its extending direction.

[0022] The static contact assembly includes a first static contact and a second static contact. Both the first static contact and the second static contact are provided with a first static contact point and a second static contact point. The first static contact point of the first static contact and the first static contact point of the second static contact correspond to the first moving contact points at both ends of the first moving contact. The second static contact point of the first static contact and the second static contact point of the second static contact correspond to the second moving contact points at both ends of the second moving contact.

[0023] The electricity meter provided in this embodiment of the present invention includes the relay provided in this embodiment of the present invention.

[0024] One embodiment of the above-described utility model has at least the following advantages or beneficial effects:

[0025] (1) The relay provided in this utility model embodiment has the following characteristics: the elastic element enables the first moving contact and the second moving contact to abut against the pusher when in the open position and the pusher defines the contact gap. The contact gap defined by the pusher for the second moving contact is smaller than that defined by the pusher for the first moving contact. This allows the first moving contact to separate from the stationary contact assembly before the second moving contact. That is, the first moving contact separates from the stationary contact assembly first, carrying current but not arcing. The second moving contact separates from the stationary contact assembly later and arcs. This method can effectively reduce the contact resistance value in the entire circuit, effectively reduce the relay temperature rise, and ensure the voltage drop during the life process and the voltage drop after the life. Compared with the traditional solution, since there is no need to differentiate the production contacts, the production is easier to control and the production efficiency is higher. Since the moving contact assembly and the pusher are guided and matched along the first direction, the moving contact assembly's movement path is stable. Therefore, the order in which the pusher causes the two to break due to the positional shift of the first or second moving contact will not change, ensuring that the arcing is concentrated between the second moving contact and the stationary contact assembly. At the same time, due to the overtravel, when the first and second moving contact moves to the closed position, the pusher will disengage from the moving contact assembly. At this time, the elastic element undergoes elastic deformation and stores energy to provide contact pressure to the first and second moving contact, ensuring that the first and second moving contact are completely force-applied by the elastic element, thereby obtaining the same contact pressure.

[0026] (2) In the relay provided by this utility model embodiment, the first moving contact and the second moving contact are both slidably engaged with the pusher in the first direction to ensure that the movement path of the first moving contact and the second moving contact is stable. Therefore, the order in which the pusher drives the two to break will not change due to the positional shift of the first moving contact or the second moving contact, and the arcing will be concentrated between the second moving contact and the stationary contact assembly.

[0027] (3) The relay provided in this utility model embodiment is provided with a first auxiliary engaging component and a second auxiliary engaging component, which are respectively used to generate a suction force along the contact pressure direction on the first moving contact and the second moving contact. The suction force can resist the electric repulsion force generated between the moving contact component and the stationary contact component due to the short circuit current, and prevent the moving contact component and the stationary contact component from being pushed apart. Attached Figure Description

[0028] Figure 1 The diagram shown is a schematic diagram of the moving contact component in the relay provided in this embodiment of the present invention in the engaged position;

[0029] Figure 2 What is shown is Figure 1 A sectional view along line AA;

[0030] Figure 3 The diagram shown is a structural schematic of the moving contact component in the relay provided in this embodiment of the present invention in the open position;

[0031] Figure 4 What is shown is Figure 3 A sectional view along line BB;

[0032] Figure 5 The diagram shown is a structural schematic of the bracket in the relay provided in an embodiment of the present invention;

[0033] Figure 6 The diagram shown is a structural schematic of the moving contact assembly cooperating with the pushing member and the elastic member in the relay provided by this utility model embodiment;

[0034] Figure 7 What is shown is Figure 6 An exploded view of the structure shown;

[0035] Figure 8 The diagram shown is another structural schematic of the moving contact component in the relay provided in this embodiment of the present invention.

[0036] The annotations in the attached figures are explained as follows:

[0037] 11-First moving contact; 111-First moving contact point; 112-Second protrusion; 12-Second moving contact; 121-Second moving contact point; 21-First stationary contact; 211-First stationary contact point; 212-Second stationary contact point; 22-Second stationary contact; 3-Pushing member; 31-Bracket; 311-Horizontal part; 3111-First protrusion; 312-Vertical part; 3121-Slot; 32-Pushing block; 321-Insertion part; 330-Rectangular through hole; 331-First sub-slide; 332-Second sub-slide; 333-Third sub-slide; 334-Fourth sub-slide; 4-Elastic member; 41-First connecting part; 42-Second connecting part; 43-Deformation part; 51-First magnetic conductor; 52-Second magnetic conductor; 53-Third magnetic conductor; 54-Fourth magnetic conductor. Detailed Implementation

[0038] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0039] See Figures 1 to 8 As shown, this embodiment provides a relay, including a stationary contact assembly, a pusher 3, a moving contact assembly, and an elastic member 4. The stationary contact assembly is fixed in position. The pusher 3 is adapted to reciprocate along a first direction. The moving contact assembly is integrally mounted on the pusher 3 and guided and cooperates with the pusher 3 along the first direction. The moving contact assembly has an open position and a closed position. The moving contact assembly includes a first moving contact 11 and a second moving contact 12. The first moving contact 11 and the second moving contact 12 are arranged along a second direction perpendicular to the first direction and can be connected in parallel. The elastic member 4 acts between the pusher 3 and the moving contact assembly along the first direction. When the moving contact assembly is in the closed position, the elastic member 4 elastically deforms so that the first moving contact 11 and the stationary contact assembly, as well as the second moving contact 12 and the stationary contact assembly, form contact pressure. When the moving contact assembly moves from the closed position to the open position, the pusher 3 successively drives the first moving contact 11 and the second moving contact 12 to separate.

[0040] The relay also includes a base, on which the static contact assembly is fixedly mounted.

[0041] Specifically, when the moving contact assembly moves from the closed position to the open position, the pusher 3 successively drives the first moving contact 11 and the second moving contact 12 to separate. This means that the elastic member 4 can make the first moving contact 11 and the second moving contact 12 abut against the pusher 3 when they are in the open position, and the pusher 3 defines a contact gap. The contact gap defined by the pusher 3 for the second moving contact 12 is smaller than the contact gap defined by the pusher 3 for the first moving contact 11, so that the first moving contact 11 separates from the stationary contact assembly before the second moving contact 12. When the moving contact assembly is in the closed position, the elastic member 4 undergoes elastic deformation, so that the first moving contact 11 and the stationary contact assembly and the second moving contact 12 and the stationary contact assembly both form contact pressure. This means that the elastic member 4 can also undergo elastic deformation and store energy when the pusher 3 disengages from the moving contact assembly, so as to provide contact pressure to the first moving contact 11 and the second moving contact 12. In this embodiment, "contact gap" refers to the contact gap between the first moving contact and the corresponding stationary contact when the moving contact assembly is in the disconnected position, or the contact gap between the second moving contact and the corresponding stationary contact.

[0042] The relay provided in this embodiment allows the first moving contact 11 and the second moving contact 12 to abut against the pusher 3 when in the open position, with the pusher 3 defining a contact gap. The contact gap defined by the pusher 3 for the second moving contact 12 is smaller than that defined by the pusher 3 for the first moving contact 11. This allows the first moving contact 11 to separate from the stationary contact assembly before the second moving contact 12, meaning the first moving contact 11 separates from the stationary contact assembly first, carrying current but not arcing. The second moving contact 12 separates from the stationary contact assembly later and arcs. This method effectively reduces the contact resistance value in the entire circuit, effectively reduces the relay temperature rise, and ensures voltage drop during and after the lifespan. Compared to traditional solutions, since there is no need for differentiated production of contacts, production is easier to control and more efficient. Since the moving contact assembly and the pusher 3 are guided and cooperated along the first direction, the moving contact assembly's movement path is stable. Therefore, the order in which the pusher 3 drives the two moving contact components to break will not change due to the positional shift of the first moving contact component 11 or the second moving contact component 12. This ensures that the arcing is concentrated between the second moving contact component 12 and the stationary contact assembly. At the same time, due to the overtravel, when the first moving contact component 11 and the second moving contact component 12 move to the closed position, the pusher 3 will disengage from the moving contact assembly. At this time, the elastic element 4 undergoes elastic deformation and stores energy to provide contact pressure to the first moving contact component 11 and the second moving contact component 12, ensuring that the first moving contact component 11 and the second moving contact component 12 are completely force-applied by the elastic element 4, thereby obtaining the same contact pressure.

[0043] It should be understood that the number of first moving contacts 11 and the number of second moving contacts 12 can both be one or at least two. The number of second moving contacts 12 is preferably one, so as to achieve arcing concentrated on one second moving contact 12. In addition, when the number of first moving contacts 11 is at least two, the contact gap between each first moving contact 11 and the corresponding static contact assembly can be equal or unequal, but it should be larger than the contact gap of the first moving contact 11.

[0044] In one embodiment, see Figures 1 to 4 As shown, the first moving contact 11 and the second moving contact 12 have the same extending direction. The first moving contact 11 is provided with a first moving contact 111 at both ends along its extending direction, and the second moving contact 12 is provided with a second moving contact 121 at both ends along its extending direction. The stationary contact assembly includes a first stationary contact 21 and a second stationary contact 22. Both the first stationary contact 21 and the second stationary contact 22 are provided with a first stationary contact 211 and a second stationary contact 212. The first stationary contact 211 of the first stationary contact 21 and the first stationary contact 211 of the second stationary contact 22 correspond to the first moving contact 111 at both ends of the first moving contact 11, and the second stationary contact 212 of the first stationary contact 21 and the second stationary contact 22 correspond to the second moving contact 121 at both ends of the second moving contact 12.

[0045] See Figure 1 and Figure 2 As shown, in the closed position, the first stationary contact 211 of the first stationary contact 21 and the first stationary contact 22 of the second stationary contact 22 are in contact with the first moving contact 111 at both ends of the first moving contact 11, and the second stationary contact 212 of the first stationary contact 21 and the second stationary contact 22 of the second stationary contact 22 are in contact with the second moving contact 121 at both ends of the second moving contact 12. At the same time, the protrusion separates from the first moving contact 11, and the elastic member 4 undergoes elastic deformation to provide contact pressure.

[0046] See Figure 3 and Figure 4 As shown, in the disconnected position, the protrusion abuts against the first moving contact 11. The distance L1 between the first moving contact 111 at both ends of the first moving contact 11 and the corresponding first stationary contact 211 is greater than the distance L2 between the second moving contact 121 at both ends of the second moving contact 12 and the corresponding second stationary contact 212.

[0047] When the moving contact assembly switches between the closed and open positions, the first stationary contact 211 and the first moving contact 111, which do not ignite and only carry current, can maintain intact surfaces and their contact resistance remains almost unchanged. The surfaces of the second stationary contact 212 and the second moving contact 121, which ignite, are burned by the electric arc, resulting in uneven surfaces and increased contact resistance. Therefore, in this embodiment, one set of contacts has a high contact resistance and the other set has a low contact resistance. Compared to the existing case where all contacts ignite, the overall contact resistance is significantly reduced.

[0048] In one embodiment, at least one of the pusher 3 and the first moving contact 11 is provided with a protrusion, which is located between the pusher 3 and the first moving contact 11, so that the contact gap between the first moving contact 11 and the stationary contact assembly is greater than the contact gap between the second moving contact 12 and the stationary contact assembly.

[0049] See Figure 4 As shown, since the protrusion is located between the pusher 3 and the first moving contact 11, it ensures that the contact gap L1 between the first moving contact 11 and the stationary contact assembly is greater than the contact gap L2 between the second moving contact 12 and the stationary contact assembly.

[0050] In one embodiment, the first movable contact 11 and the second movable contact 12 are both slidably engaged with the pusher 3 along the first direction to ensure that the movement paths of the first movable contact 11 and the second movable contact 12 are stable. Therefore, the order in which the pusher 3 drives the two to break will not change due to the positional shift of the first movable contact 11 or the second movable contact 12, thus ensuring that the arcing is concentrated between the second movable contact 12 and the stationary contact assembly.

[0051] In some embodiments, the first moving contact 11 and the second moving contact 12 are both directly slidingly engaged with the pusher 3 along the first direction.

[0052] In other embodiments, the first moving contact 11 and the second moving contact 12 may also be indirectly slidably engaged with the pusher 3 along the first direction via a connecting component.

[0053] In one embodiment, see Figure 1As shown, the pusher 3 includes a push block 32 and a bracket 31, with the push block 32 fixedly connected to the bracket 31. The bracket 31 is provided with a first slide rail and a second slide rail. The first moving contact 11 is slidably engaged with the first slide rail, and the second moving contact 12 is slidably engaged with the second slide rail. When the moving contact assembly is in the disconnected position, one end of the elastic member 4 abuts against the push block 32, and the other end of the elastic member 4 abuts the moving contact assembly against the bracket 31. A protrusion is provided on the bracket 31. In this embodiment, the protrusion provided on the bracket is named the first protrusion 3111. When the first moving contact 11 and the second moving contact 12 are in contact with the stationary contact assembly, the protrusion can separate from the first moving contact 11. When the pusher 3 moves away from the stationary contact assembly, the protrusion can abut against the first moving contact 11, so that the contact gap between the first moving contact 11 and the stationary contact assembly is greater than the contact gap between the second moving contact 12 and the stationary contact assembly.

[0054] In some embodiments, the bracket 31 is provided with a slot 3121, and the push block 32 is provided with a plug-in portion 321, the plug-in portion 321 being confined within the slot 3121, so that the push block 32 is fixedly connected to the bracket 31. (See reference) Figure 7 The elastic element 4 includes a spring, which includes a first connecting portion 41, a second connecting portion 42, and a deformation portion 43. The deformation portion 43 is connected between the first connecting portion 41 and the second connecting portion 42. When the moving contact assembly is in the open position, the first connecting portion 41 abuts against the push block 32, and the second connecting portion 42 abuts the moving contact assembly against the bracket 31.

[0055] In some embodiments, along the first direction, the two ends of the elastic member 4 are fixedly connected to the push block 32 and the first moving contact member 11 and the second moving contact member 12, respectively. This further enables the first moving contact member 11 and the second moving contact member 12 to move stably along the first direction.

[0056] Specifically, the first connecting part 41 is fixedly connected to the pushing block 32, and the second connecting part 42 is fixedly connected to the first moving contact 11 and the second moving contact 12.

[0057] When the first moving contact 11 and the second moving contact 12 come into contact with the stationary contact assembly, the pusher 3 continues to travel beyond its travel range and disengages from the moving contact assembly. At this time, the protrusion separates from the first moving contact 11. Since the first protrusion 3111 is located between the bracket 31 and the first moving contact 11, when the pusher 3 moves away from the stationary contact assembly, the first protrusion 3111 can abut against the first moving contact 11, so that the contact gap between the first moving contact 11 and the stationary contact assembly is greater than the contact gap between the second moving contact 12 and the stationary contact assembly. This ensures that the first moving contact 11 separates from the stationary contact assembly before the second moving contact 12, that is, the first moving contact 11 separates from the stationary contact assembly first, carrying current but not igniting an arc, while the second moving contact 12 separates from the stationary contact assembly later and ignites an arc.

[0058] In one embodiment, see Figure 5 As shown, the bracket 31 is a U-shaped frame, which includes a horizontal part 311 and two vertical parts 312. The two vertical parts 312 are respectively fixed to both ends of the horizontal part 311. The horizontal part 311 is provided with a first slide rail and a second slide rail. The pushing block 32 is fixed to the two vertical parts 312. The first moving contact 11 and the second moving contact 12 are both located between the two vertical parts 312 and slide relative to the first slide rail and the second slide rail respectively. The first protrusion 3111 is provided on the horizontal part 311.

[0059] For example, see Figure 7 As shown, the insertion part 321 can be a insert, and inserts are provided on both sides of the push block 32. Both vertical parts 312 are provided with slots 3121, and the inserts are inserted and fixed in the slots 3121.

[0060] The first slide rail includes a first sub-slide rail 331 and a second sub-slide rail 332. The first sub-slide rail 331 is located in the horizontal portion 311, and the second sub-slide rail 332 is located at the corner between the horizontal portion 311 and the vertical portion 312 near the first moving contact member 11. The second slide rail includes a third sub-slide rail 333 and a fourth sub-slide rail 334. The third sub-slide rail 333 is located in the horizontal portion 311, and the fourth sub-slide rail 334 is located at the corner between the horizontal portion 311 and the vertical portion 312 near the second moving contact member 12. The first sub-slide rail 331 and the third sub-slide rail 333 can communicate to form a rectangular through hole 330.

[0061] For example, the vertical portion 312 may be integrally formed with the horizontal portion 311.

[0062] In one embodiment, the first protrusion 3111 is disposed on the transverse portion 311, and includes a plurality of columnar protrusions, which are spaced apart along the extension direction of the first moving contact member 11.

[0063] For example, see Figure 5 and Figure 6 As shown, there can be two columnar protrusions, which are spaced apart along the extending direction of the first moving contact 11. The columnar protrusions can be formed by stamping the transverse portion 311.

[0064] In other embodiments, the protrusion may also be provided on the vertical portion 312.

[0065] It should be noted that a protrusion may or may not be provided between the second moving contact 12 and the pusher 3. When a protrusion is provided between the second moving contact 12 and the pusher 3, it is also necessary to ensure that the contact gap of the second moving contact 12 is smaller than the contact gap of the first moving contact 11.

[0066] In one embodiment, the relay further includes a first auxiliary engaging component and a second auxiliary engaging component; the first auxiliary engaging component includes a first magnetic conductor 51 and a second magnetic conductor 52; the second auxiliary engaging component includes a third magnetic conductor 53 and a fourth magnetic conductor 54; the first magnetic conductor 51 and the third magnetic conductor 53 are respectively fixed to the side of the first moving contact 11 and the second moving contact 12 opposite to the stationary contact component and are respectively slidably engaged with the first slide rail and the second slide rail along a first direction; the first moving contact 11 and the second moving contact 12 are respectively indirectly slidably engaged with the pusher 3 along the first direction through the first magnetic conductor 51 and the third magnetic conductor 53. The second magnetic conductor 52 and the fourth magnetic conductor 54 are fixed relative to the stationary contact component and are respectively located on the side of the first moving contact 11 and the second moving contact 12 facing the stationary contact component.

[0067] The first and second auxiliary attraction components are used to generate attraction forces along the contact pressure direction on the first moving contact 11 and the second moving contact 12, respectively. These attraction forces can resist the electrodynamic repulsion force generated between the moving contact components and the stationary contact components due to the short-circuit current, preventing the moving contact components from springing apart from the stationary contact components. The first and second magnetic conductive components 51 and 53, as well as the third and fourth magnetic conductive components, can form a magnetic circuit.

[0068] In some embodiments, the first magnetic conductive element 51 and the third magnetic conductive element 53 are both U-shaped plate structures, and the second magnetic conductive element 52 and the fourth magnetic conductive element 54 can both be flat plate structures. For example, the second magnetic conductive element 52 and the fourth magnetic conductive element 54 are integrally formed.

[0069] For example, the first magnetic conductive element 51, the second magnetic conductive element 52, the third magnetic conductive element 53 and the fourth magnetic conductive element 54 can be made of soft magnetic materials such as iron, cobalt, nickel and their alloys.

[0070] In other embodiments, the protrusion may also be provided on the side of the first moving contact 11 facing the stationary contact assembly; see also Figure 8As shown, the protrusion provided on the first moving contact 11 is named the second protrusion 112. When the first moving contact 11 and the second moving contact 12 are in contact with the stationary contact assembly, the pusher 3 continues to travel beyond its travel range, causing the bracket 31 to separate from the second protrusion 112; when the pusher 3 moves away from the stationary contact assembly, the bracket 31 can abut against the protrusion, so that the contact gap between the first moving contact 11 and the stationary contact assembly is greater than the contact gap between the second moving contact 12 and the stationary contact assembly.

[0071] It should be noted that the structural forms of the moving contact assembly and the stationary contact assembly are not limited to the one described above. For example, in other embodiments, one end of the moving contact assembly may be fixed relative to the stationary contact assembly, and the other end of the moving contact assembly may be forked to form a first moving contact 11 and a second moving contact 12. The first moving contact 11 is provided with a third moving contact, and the second moving contact 12 is provided with a fourth moving contact. The stationary contact assembly includes a third stationary contact, which is provided with a third stationary contact and a fourth stationary contact, which correspond to the third moving contact and the fourth moving contact, respectively. In the open position, the third moving contact is separated from the third stationary contact, and the fourth moving contact is separated from the fourth stationary contact. In the closed position, the third moving contact is in contact with the third stationary contact, and the fourth moving contact is in contact with the fourth stationary contact.

[0072] This embodiment also provides an electricity meter, including the relay provided in this embodiment.

[0073] The electricity meter provided in this embodiment, by using the relay provided in this embodiment, is beneficial to improving the accuracy and service life of the electricity meter. Specifically, the elastic element 4 in the relay enables the first moving contact 11 and the second moving contact 12 to abut against the pusher 3 when in the open position, and the pusher 3 defines a contact gap. The contact gap defined by the pusher 3 for the second moving contact 12 is smaller than the contact gap defined by the pusher 3 for the first moving contact 11, so that the first moving contact 11 separates from the stationary contact assembly before the second moving contact 12. That is, the first moving contact 11 separates from the stationary contact assembly first, carrying current but not arcing, while the second moving contact 12 separates from the stationary contact assembly later and arcs. This method can effectively reduce the contact resistance value in the entire circuit, effectively reduce the relay temperature rise, and ensure voltage drop during and after the lifespan. Compared with traditional solutions, since there is no need to differentiate the production of contacts, production is easier to control and more efficient. Since the moving contact assembly and the pusher 3 are guided and cooperated along the first direction, the moving contact assembly's movement path is stable. Therefore, the order in which the pusher 3 drives the two moving contact components to break will not change due to the positional shift of the first moving contact component 11 or the second moving contact component 12. This ensures that the arcing is concentrated between the second moving contact component 12 and the stationary contact assembly. At the same time, due to the overtravel, when the first moving contact component 11 and the second moving contact component 12 move to the closed position, the pusher 3 will disengage from the moving contact assembly. At this time, the elastic element 4 undergoes elastic deformation and stores energy to provide contact pressure to the first moving contact component 11 and the second moving contact component 12, ensuring that the first moving contact component 11 and the second moving contact component 12 are completely force-applied by the elastic element 4, thereby obtaining the same contact pressure.

[0074] Finally, it should be noted that the various embodiments / implementations provided by this utility model can be combined with each other without creating contradictions, and will not be described in detail here.

[0075] In the embodiments of the utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the utility model according to the specific circumstances.

[0076] In the description of the utility model embodiments, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the utility model embodiments and simplifying the description, and do not indicate or imply that the device or unit 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 the utility model embodiments.

[0077] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0078] The above are merely preferred embodiments of the utility model and are not intended to limit the utility model. For those skilled in the art, various modifications and variations can be made to the utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the utility model should be included within the protection scope of the utility model.

Claims

1. A relay characterized by comprising: The utility model relates to a static contact assembly, a pusher, a dynamic contact assembly and a spring, the static contact assembly is fixed in position, the pusher is suitable for reciprocating motion along the first direction, the dynamic contact assembly is integrally installed to the pusher and is guided with the pusher along the first direction, the dynamic contact assembly has the off position and the closed position, the dynamic contact assembly includes the first dynamic contact and the second dynamic contact, the first dynamic contact and the second dynamic contact are arranged along the second direction perpendicular to the first direction and can be connected in parallel, and the spring acts between the pusher and the dynamic contact assembly along the first direction. When the dynamic contact assembly is in the closed position, the spring is elastically deformed to make the first dynamic contact and the second dynamic contact form contact pressure with the static contact assembly, and when the dynamic contact assembly is in the off position, the contact gap of the first dynamic contact is greater than that of the second dynamic contact, so that the pusher drives the first dynamic contact and the second dynamic contact to separate in sequence when the dynamic contact assembly moves from the closed position to the off position. At least one of the pusher and the first dynamic contact is provided with a protrusion between the pusher and the first dynamic contact, so that the contact gap between the first dynamic contact and the static contact assembly is greater than that between the second dynamic contact and the static contact assembly. The first dynamic contact and the second dynamic contact are slidably connected with the pusher along the first direction. The pusher includes a push block and a bracket, the push block is fixedly connected with the bracket, the bracket is provided with a first sliding groove and a second sliding groove, the first dynamic contact is slidably connected with the first sliding groove, and the second dynamic contact is slidably connected with the second sliding groove, one end of the spring abuts against the push block when the dynamic contact assembly is in the off position, and the other end of the spring abuts against the bracket. The protrusion is arranged on the bracket, the protrusion can be separated from the first dynamic contact when the first dynamic contact and the second dynamic contact contact the static contact assembly, and the protrusion can abut against the first dynamic contact when the pusher moves away from the static contact assembly, so that the contact gap between the first dynamic contact and the static contact assembly is greater than that between the second dynamic contact and the static contact assembly. The bracket is a U-shaped bracket, the U-shaped bracket includes a horizontal part and two vertical parts, the two vertical parts are fixedly connected with two ends of the horizontal part respectively, the horizontal part is provided with the first sliding groove and the second sliding groove, the push block is fixedly connected with the two vertical parts, the first dynamic contact and the second dynamic contact are located between the two vertical parts and slide relative to the first sliding groove and the second sliding groove respectively, and the protrusion is arranged on the vertical part or the horizontal part.

2. The relay according to claim 1, characterized in that The protrusion is arranged on the horizontal part and includes a plurality of columnar protrusions, and the columnar protrusions are arranged at intervals along the extension direction of the first dynamic contact.

3. The relay according to claim 2, characterized in that ​ 4. The relay according to claim 3, characterized in that ​ ​ 5. The relay of claim 4, wherein ​ 6. The relay of claim 5, wherein ​ 7. The relay of claim 4, wherein Further comprising a first auxiliary suction assembly and a second auxiliary suction assembly; the first auxiliary suction assembly comprises a first magnetic guide and a second magnetic guide; the second auxiliary suction assembly comprises a third magnetic guide and a fourth magnetic guide; the first magnetic guide and the third magnetic guide are respectively fixed to the first movable contact and the second movable contact on the side away from the static contact assembly and are respectively slidably connected with the first sliding channel and the second sliding channel along the first direction; the second magnetic guide and the fourth magnetic guide are fixed relative to the static contact assembly and are respectively located on the side of the first movable contact and the second movable contact towards the static contact assembly.

8. The relay of claim 4, wherein The two ends of the elastic member along the first direction are respectively fixed to the pushing block and the first movable contact and the second movable contact.

9. The relay of claim 5, wherein The vertical part is provided with a clamping groove, and the pushing block is provided with an insertion part limited in the clamping groove, so that the pushing block is fixed to the vertical part.

10. The relay of claim 4, wherein The protruding part is arranged on the side of the first movable contact towards the static contact assembly; when the first movable contact and the second movable contact contact the static contact assembly, the bracket can be separated from the protruding part, and when the pushing member moves away from the static contact assembly, the bracket can abut against the protruding part, so that the contact gap between the first movable contact and the static contact assembly is greater than the contact gap between the second movable contact and the static contact assembly.

11. The relay according to any one of claims 1 to 10, characterized in that The first movable contact and the second movable contact have the same extension direction, and the first movable contact is provided with a first movable contact point at each end along the extension direction, and the second movable contact is provided with a second movable contact point at each end along the extension direction. The static contact assembly comprises a first static contact and a second static contact, and the first static contact and the second static contact are both provided with a first static contact point and a second static contact point; the first static contact point of the first static contact and the first static contact point of the second static contact correspond to the first movable contact points at the two ends of the first movable contact respectively, and the second static contact point of the first static contact and the second static contact point of the second static contact correspond to the second movable contact points at the two ends of the second movable contact respectively.

12. An electricity meter, characterised in that The relay of any one of claims 1 to 11 is included.

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