Relay and electricity meter

Abstract

The present application relates to the technical field of electronic control devices, and in particular to a relay and an electricity meter. The relay comprises a stationary contact assembly, a pushing member, a movable contact assembly, and an elastic member. The position of the stationary contact assembly is fixed. The pushing member performs reciprocating motion in a first direction. The movable contact assembly is integrally mounted on the pushing member; and the movable contact assembly is in guide fit with the pushing member in the first direction. The movable contact assembly has an open position and a closed position, and comprises a first movable contact member and a second movable contact member, wherein the first movable contact member and the second movable contact member are arranged in a second direction perpendicular to the first direction and may be connected in parallel. The elastic member acts between the pushing member and the movable contact assembly in the first direction. At the closed position, the elastic member deforms, so that contact pressure is generated between the first movable contact member and the stationary contact assembly, and between the second movable contact member and the stationary contact assembly. During movement toward the open position, the pushing member sequentially drives the separation of the first movable contact member and the separation of the second movable contact member. In this way, a contact resistance value of the overall loop is reduced and contact pressure is ensured to be balanced.

Description

Relays and meters Cross-references to related applications

[0001] This disclosure claims priority to China National Intellectual Property Administration application No. 202520128672.4 filed on January 20, 2025, entitled “Relay and Meter”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of electronic control device technology, and more specifically, to a relay and an electric meter. Background Technology

[0003] 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.

[0004] 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 create a contact gap difference after the different moving contacts are broken, so that the different moving contacts can be broken sequentially. This is used to control the contact position where arcing occurs. However, this solution will lead to uneven contact pressure of different moving contacts when using the same elastic component, affecting the contact pressure drop, and the production process is not easy to control, affecting production efficiency. Summary of the Invention

[0005] This disclosure provides a relay and meter that can effectively control the 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.

[0006] The relay provided in this disclosure includes:

[0007] The static contact component has a fixed position.

[0008] A pusher component, which is adapted to reciprocate along a first direction;

[0009] 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

[0010] An elastic component that acts between the pusher and the moving contact component along the first direction;

[0011] When the moving contact assembly is in the closed position, the elastic component elastically deforms to create contact pressure between the first moving contact and the stationary contact assembly, as well as between the second moving contact and the stationary contact assembly. When the moving contact assembly is in the open position, both the first and second moving contact abut against the pusher and the pusher defines a contact gap. The contact gap of the first moving contact is larger than that of the second moving contact, so that when the moving contact assembly moves from the closed position to the open position, the pusher sequentially drives the first and second moving contact to separate from the stationary contact assembly.

[0012] According to some embodiments of this disclosure, 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, such 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.

[0013] According to some embodiments of this disclosure, both the first moving contact and the second moving contact are slidably engaged with the pushing member along a first direction.

[0014] According to some embodiments of this disclosure, the pushing member includes a pushing block and a bracket, the pushing block being fixedly connected to the bracket; the first moving contact is guided and engaged with the bracket, and / or the second moving contact is guided and engaged with the bracket; when the moving contact assembly is in the disconnected position, one end of the elastic component abuts against the pushing block, and the other end of the elastic component abuts the moving contact assembly against the bracket.

[0015] 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.

[0016] According to some embodiments of this disclosure, 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 pushing block is fixed to the two vertical portions. The first moving contact and the second moving contact are both located between the two vertical portions. The protrusion is disposed on the vertical portion or the horizontal portion.

[0017] According to some embodiments of this disclosure, 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.

[0018] According to some embodiments of this disclosure, the moving contact assembly further includes a first magnetic conductor and a third magnetic conductor; the relay further includes a second magnetic conductor and a fourth magnetic conductor; the bracket is provided with a first slide rail and a second slide rail; the first magnetic conductor and the third magnetic conductor are respectively fixed to the side of the first moving contact member away from the static contact assembly and the side of the second moving contact member away from the static contact assembly, and respectively slide in cooperation with the first slide rail and the second slide rail in a first direction; the first moving contact member establishes a guiding cooperation relationship with the bracket through the sliding cooperation between the first magnetic conductor and the first slide rail; the second moving contact member establishes a guiding cooperation relationship with the bracket through the sliding cooperation between the third magnetic conductor and the second slide rail; the second magnetic conductor and the fourth magnetic conductor are fixed relative to the static contact assembly and are respectively located on the side of the first moving contact member facing the static contact assembly and the side of the second moving contact member facing the static contact assembly.

[0019] According to some embodiments of this disclosure, 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 pushing block is fixed to the two vertical portions. The horizontal portion is provided with a first slide rail and a second slide rail.

[0020] According to some embodiments of this disclosure, one end of the elastic component along the first direction is fixed relative to the push block, and the other end is fixedly connected to the first moving contact and the second moving contact.

[0021] According to some embodiments of this disclosure, the elastic component includes two springs arranged along the second direction; the two springs are respectively disposed corresponding to the first moving contact and the second moving contact and each includes a first connecting portion, a second connecting portion and a deformable portion; the deformable portion is connected between the first connecting portion and the second connecting portion, the first connecting portions of the two springs are integrated and abut against the push block and fixed relative to the push block, the second connecting portion of one spring is fixedly connected to the first moving contact, and the second connecting portion of the other spring is fixedly connected to the second moving contact.

[0022] According to some embodiments of this disclosure, the vertical portion is provided with a slot, and the push block is provided with a plug-in portion, the plug-in portion being limited to the slot so that the push block is fixedly connected to the vertical portion.

[0023] According to some embodiments of this disclosure, the protrusion is disposed on the side of the first moving contact member facing the stationary contact assembly; when the moving contact assembly is in the closed position, the bracket can separate from the protrusion; when the pusher 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.

[0024] According to some embodiments of this disclosure, 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.

[0025] 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.

[0026] The electricity meter provided in this disclosure includes the relay provided in this disclosure.

[0027] One embodiment disclosed above has at least the following advantages or beneficial effects:

[0028] (1) The relay provided in this embodiment of the present disclosure has the following characteristics: the elastic component enables the first moving contact and the second moving contact to abut against the pusher when in the open position and the pusher defines a contact gap. The contact gap defined by the pusher for the second moving contact is smaller than the contact gap 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 service life, voltage drop during service life, and voltage drop after service 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. Because the moving contact assembly and the pusher are guided and cooperated 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 component 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 component, thereby obtaining the same contact pressure.

[0029] (2) In the relay provided in this 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 paths of the first moving contact and the second moving contact are 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.

[0030] (3) The relay provided in this embodiment of the present disclosure is provided with a first magnetic conductive element and a third magnetic conductive element that can assist in the engagement, as well as a second magnetic conductive element and a fourth magnetic conductive element that can assist in the engagement, which are used to generate an attraction force along the contact pressure direction on the first moving contact and the second moving contact respectively. The attraction force can resist the electric repulsion force generated between the moving contact assembly and the stationary contact assembly due to the short circuit current, and prevent the moving contact assembly and the stationary contact assembly from being bounced apart. Attached Figure Description

[0031] Figure 1 shows a schematic diagram of the structure of the moving contact component in the relay provided in the embodiment of this disclosure in the closed position;

[0032] Figure 2 shows a cross-sectional view along line AA of Figure 1;

[0033] Figure 3 shows a schematic diagram of the structure of the moving contact component in the relay provided in the embodiment of this disclosure in the open position;

[0034] Figure 4 shows a cross-sectional view along line BB of Figure 3;

[0035] Figure 5 shows a schematic diagram of the structure of the bracket in the relay provided in the embodiment of this disclosure;

[0036] Figure 6 shows a schematic diagram of the structure of the moving contact component cooperating with the pusher and elastic component in the relay provided in the embodiment of this disclosure;

[0037] Figure 7 shows an exploded view of the structure shown in Figure 6;

[0038] Figure 8 shows another structural schematic diagram of the moving contact assembly in the relay provided in the embodiments of this disclosure.

[0039] The reference numerals in the attached drawings are explained as follows: 11-First moving contact; 111-First moving contact; 112-Second protrusion; 12-Second moving contact; 121-Second moving contact; 21-First stationary contact; 211-First stationary contact; 212-Second stationary contact; 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 component; 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

[0040] 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, they are provided so that this disclosure 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.

[0041] Referring to Figures 1 to 8, this embodiment provides a relay, including a static contact assembly, a pusher 3, a moving contact assembly, and an elastic component 4. The static 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, which are arranged along a second direction perpendicular to the first direction and can be connected in parallel; the elastic component 4 acts on the pusher 3 and the moving contact 12 along the first direction. Between the contact components; when the moving contact component is in the closed position, the elastic component 4 elastically deforms so that the first moving contact 11 and the stationary contact component and the second moving contact 12 and the stationary contact component both form contact pressure; when the moving contact component is in the open position, the first moving contact 11 and the second moving contact 12 both abut against the pusher 3 and the pusher 3 defines the contact gap. The contact gap of the first moving contact 11 is greater than the contact gap of the second moving contact 12, so that when the moving contact component 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 from the stationary contact component.

[0042] The relay also includes a base, on which the static contact assembly is fixedly mounted.

[0043] 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 component 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 component 4 undergoes elastic deformation, 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. This means that the elastic component 4 can 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 distance between the contact point of the first moving contact and the contact point of the corresponding stationary contact when the moving contact assembly is in the disconnected position, or the distance between the contact point of the second moving contact and the contact point of the corresponding stationary contact.

[0044] 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 service life, voltage drop during service life, and voltage drop after service life. Compared to 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 to break will not change due to the positional shift of the first moving contact 11 or the second moving contact 12, ensuring that the arcing is concentrated between the second moving contact 12 and the stationary contact assembly. At the same time, due to the overtravel, when the first moving contact 11 and the second moving contact 12 move to the closed position, the pusher 3 will disengage from the moving contact assembly. At this time, the elastic component 4 undergoes elastic deformation and stores energy to provide contact pressure to the first moving contact 11 and the second moving contact 12, ensuring that the first moving contact 11 and the second moving contact 12 are completely force-applied by the elastic component 4, thereby obtaining the same contact pressure.

[0045] 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 must be larger than the contact gap of the second moving contact 12.

[0046] In one embodiment, referring to Figures 1 to 4, 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 contacts 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 contacts 121 at both ends of the second moving contact 12.

[0047] Referring to Figures 1 and 2, in the closed position, the first stationary contact 211 of the first stationary contact 21 and the first stationary contact 22 are in contact with the first moving contacts 111 at both ends of the first moving contact 11, respectively. The second stationary contact 212 of the first stationary contact 21 and the second stationary contact 22 are in contact with the second moving contacts 121 at both ends of the second moving contact 12, respectively. At the same time, the pusher 3 separates from the first moving contact 11, and the elastic component 4 undergoes elastic deformation to provide contact pressure.

[0048] Referring to Figures 3 and 4, in the disconnected position, the pusher 3 abuts against the first moving contact 11 through a protrusion. The distance L1 between the first moving contact 111 at both ends of the first moving contact 111 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.

[0049] 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.

[0050] 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.

[0051] Referring to Figure 4, since the protrusion is located between the pusher 3 and the first moving contact 11, 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.

[0052] 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.

[0053] 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.

[0054] In other embodiments, both 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 other transition components. In other words, the guiding engagement between the moving contact assembly and the pusher 3 along the first direction can be a direct guiding engagement or an indirect guiding engagement via other transition components.

[0055] In one embodiment, referring to FIG1, the pusher 3 includes a push block 32 and a bracket 31, the push block 32 being fixedly connected to the bracket 31; the first moving contact 11 is guided and engaged with the bracket 31, and / or the second moving contact 12 is guided and engaged with the bracket 31; when the moving contact assembly is in the open position, one end of the elastic component 4 abuts against the push block 32, and the other end of the elastic component 4 abuts the moving contact assembly against the bracket 31.

[0056] In one embodiment, 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.

[0057] In some embodiments, referring to Figures 5 and 7, 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 is confined within the slot 3121 to fix the push block 32 to the bracket 31. Referring to Figure 7, the elastic component 4 includes a spring, which includes a first connecting portion 41, a second connecting portion 42, and a deformable portion 43. The deformable portion 43 is connected between the first connecting portion 41 and the second connecting portion 42. When the moving contact component 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 component against the bracket 31.

[0058] In some embodiments, along the first direction, one end of the elastic component 4 is fixed relative to the push block 32, and the other end of the elastic component 4 is fixedly connected to the first moving contact 11 and the second moving contact 12. This further enables the first moving contact 11 and the second moving contact 12 to move stably along the first direction.

[0059] Specifically, the first connecting part 41 is fixed relative 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.

[0060] Referring to Figures 6 and 7, in this embodiment, the elastic component 4 includes two springs arranged along the second direction. The two springs are respectively disposed corresponding to the first moving contact 11 and the second moving contact 12. The first connecting portions 41 of the two springs are connected as one piece and abut against the push block 32, and are inserted and fixed relative to the push block 32. The second connecting portion 42 of one spring is fixedly connected to the first moving contact 11, and the second connecting portion 42 of the other spring is fixedly connected to the second moving contact 12.

[0061] 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.

[0062] In one embodiment, referring to FIG5, the bracket 31 is a U-shaped frame, which includes a horizontal portion 311 and two vertical portions 312. The two vertical portions 312 are respectively fixed to both ends of the horizontal portion 311. The horizontal portion 311 is provided with a first slide rail and a second slide rail. The push block 32 is fixed to the two vertical portions 312. The first moving contact 11 and the second moving contact 12 are both located between the two vertical portions 312. The first protrusion 3111 is provided on the horizontal portion 311.

[0063] For example, as shown in Figure 7, 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.

[0064] Referring to Figure 7, the bracket 31 is provided with a first slide rail and a second slide rail. 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 may be connected to form a rectangular through hole 330, or they may not be connected.

[0065] For example, the vertical portion 312 may be integrally formed with the horizontal portion 311.

[0066] 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.

[0067] For example, referring to Figures 5 and 6, the number of columnar protrusions can be two, and the two columnar protrusions 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.

[0068] In other embodiments, the protrusion may also be provided on the vertical portion 312.

[0069] 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.

[0070] In one embodiment, the moving contact assembly further includes a first magnetic conductor 51 and a third magnetic conductor 53; the relay further includes a second magnetic conductor 52 and a fourth magnetic conductor 54; the first magnetic conductor 51 and the second magnetic conductor 52 constitute a first auxiliary engaging assembly; the third magnetic conductor 53 and the fourth magnetic conductor 54 constitute a second auxiliary engaging assembly; the first magnetic conductor 51 and the third magnetic conductor 53 are respectively fixed to the side of the first moving contact 11 opposite to the stationary contact assembly and the side of the second moving contact 12 opposite to the stationary contact assembly, and respectively slide in cooperation with the first slide rail and the second slide rail along a first direction; the first moving contact 11 establishes a guide with the bracket 31 through the sliding cooperation between the first magnetic conductor 51 and the first slide rail. The second moving contact 12 establishes a guiding relationship with the bracket 31 through the sliding engagement between the third magnetic guide 53 and the second slide rail; the first moving contact 11 and the second moving contact 12 respectively indirectly slide with the pusher 3 along the first direction through the first magnetic guide 51 and the third magnetic guide 53, that is, in this embodiment, the first magnetic guide 51 and the third magnetic guide 53 constitute the aforementioned transition component. It should be understood that the guiding engagement between the first moving contact 11 and the second moving contact 12 and the pusher 3 can also be achieved by setting mutually cooperating protrusions and grooves, mutually cooperating guide rods and guide holes, etc., and is not limited to the solution provided in this embodiment. The second magnetic guide 52 and the fourth magnetic guide 54 are fixed relative to the static contact assembly and are respectively located on the side of the first moving contact 11 facing the static contact assembly and the side of the second moving contact 12 facing the static contact assembly.

[0071] The first auxiliary attraction component and the second auxiliary attraction component are respectively used to generate an attraction force along the contact pressure direction on the first moving contact 11 and the second moving contact 12. This attraction force can resist the electrodynamic 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 bounced apart. Among them, the first magnetic conductive component 51 and the second magnetic conductive component 52 can form a magnetic conductive circuit, and the third magnetic conductive component 53 and the fourth magnetic conductive component 54 can form a magnetic conductive circuit.

[0072] In some embodiments, both the first magnetic conductive element 51 and the third magnetic conductive element 53 have a U-shaped plate structure. Referring to Figures 6 and 7, one of the two opposing walls of the first magnetic conductive element 51 is slidably disposed in the first sub-slide rail 331, and the other is slidably engaged with the second sub-slide rail; one of the two opposing walls of the third magnetic conductive element 53 is slidably disposed in the third sub-slide rail 333, and the other is slidably engaged with the fourth sub-slide rail 334. The second magnetic conductive element 52 and the fourth magnetic conductive element 54 may both have a flat plate structure. Exemplarily, the second magnetic conductive element 52 and the fourth magnetic conductive element 54 are integrally formed.

[0073] 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.

[0074] In other embodiments, the protrusion may also be provided on the side of the first moving contact 11 facing the stationary contact assembly; referring to FIG8, 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 over the travel until the moving contact assembly reaches the closed position, at which point the bracket 31 separates from the second protrusion 112; when the pusher 3 moves away from the stationary contact assembly, the bracket 31 can abut against the second protrusion 112, 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.

[0075] This embodiment also provides an electricity meter, including the relay provided in this embodiment.

[0076] 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 component 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 service life, voltage drop during service life, and voltage drop after service life. Compared with traditional solutions, since there is no need to differentiate the production of contacts, production is easier to control and the production efficiency is higher. 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 to break will not change due to the positional shift of the first moving contact 11 or the second moving contact 12, ensuring that the arcing is concentrated between the second moving contact 12 and the stationary contact assembly. At the same time, due to the overtravel, when the first moving contact 11 and the second moving contact 12 move to the closed position, the pusher 3 will disengage from the moving contact assembly. At this time, the elastic component 4 undergoes elastic deformation and stores energy to provide contact pressure to the first moving contact 11 and the second moving contact 12, ensuring that the first moving contact 11 and the second moving contact 12 are completely force-applied by the elastic component 4, thereby obtaining the same contact pressure.

[0077] Finally, it should be noted that the various embodiments / implementations provided in this disclosure can be combined with each other without creating contradictions, and will not be described in detail here.

[0078] In the disclosed embodiments, 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 expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" 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 disclosed embodiments according to the specific circumstances.

[0079] In the description of the disclosed 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 accompanying drawings. They are only for the convenience of describing the disclosed 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 disclosed embodiments.

[0080] 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 disclosed embodiments. 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.

[0081] The above are merely preferred embodiments of the disclosed embodiments and are not intended to limit the disclosed embodiments. For those skilled in the art, the disclosed embodiments can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the disclosed embodiments should be included within the protection scope of the disclosed embodiments.

Claims

1. A relay, characterized in that, include: The static contact component has a fixed position. A pusher component, which is adapted to reciprocate along a first direction; A movable contact assembly is integrally mounted on the pusher and guided and engaged with the pusher along a first direction. The movable contact assembly has an open position and a closed position. The movable contact assembly includes a first movable contact element and a second movable contact element. The first movable contact element and the second movable contact element are arranged along a second direction perpendicular to the first direction and can be connected in parallel. as well as An elastic component that acts between the pusher and the moving contact component along the first direction; When the moving contact assembly is in the closed position, the elastic component elastically deforms to create contact pressure between the first moving contact and the stationary contact assembly, as well as between the second moving contact and the stationary contact assembly. When the moving contact assembly is in the open position, both the first and second moving contact abut against the pusher and the pusher defines a contact gap. The contact gap of the first moving contact is larger than that of the second moving contact, so that when the moving contact assembly moves from the closed position to the open position, the pusher sequentially drives the first and second moving contact to separate from the stationary contact assembly.

2. The relay according to claim 1, characterized in that, At least one of the pusher and the first moving contact is provided with a protrusion, the protrusion being located between the pusher and the first moving contact, such 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.

3. The relay according to claim 2, characterized in that, Both the first moving contact and the second moving contact are slidably engaged with the pushing member along the first direction.

4. The relay according to claim 2, characterized in that, The pushing member includes a pushing block and a bracket, the pushing block being fixedly connected to the bracket; the first moving contact is guided and engaged with the bracket, and / or the second moving contact is guided and engaged with the bracket; when the moving contact assembly is in the disconnected position, one end of the elastic component abuts against the pushing block, and the other end of the elastic component abuts the moving contact assembly against the bracket.

5. The relay according to claim 4, characterized in that, 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.

6. The relay according to claim 4, characterized in that, The bracket is a U-shaped frame, which includes a horizontal part and two vertical parts. The two vertical parts are respectively fixed to the two ends of the horizontal part. The pushing block is fixed to the two vertical parts. The first moving contact and the second moving contact are both located between the two vertical parts. The protrusion is provided on the vertical part or the horizontal part.

7. The relay according to claim 6, characterized in that, 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.

8. The relay according to claim 4, characterized in that, The moving contact assembly further includes a first magnetic conductor and a third magnetic conductor; the relay further includes a second magnetic conductor and a fourth magnetic conductor; the bracket is provided with a first slide rail and a second slide rail; the first magnetic conductor and the third magnetic conductor are respectively fixed to the side of the first moving contact member away from the static contact assembly and the side of the second moving contact member away from the static contact assembly, and respectively slide in cooperation with the first slide rail and the second slide rail along a first direction; the first moving contact member establishes a guiding cooperation relationship with the bracket through the sliding cooperation between the first magnetic conductor and the first slide rail; the second moving contact member establishes a guiding cooperation relationship with the bracket through the sliding cooperation between the third magnetic conductor and the second slide rail; the second magnetic conductor and the fourth magnetic conductor are fixed relative to the static contact assembly and are respectively located on the side of the first moving contact member facing the static contact assembly and the side of the second moving contact member facing the static contact assembly.

9. The relay according to claim 8, characterized in that, The bracket is a U-shaped frame, which includes a horizontal part and two vertical parts. The two vertical parts are respectively fixed to the two ends of the horizontal part. The pushing block is fixed to the two vertical parts. The horizontal part is provided with a first slide rail and a second slide rail.

10. The relay according to claim 4, characterized in that, One end of the elastic component along the first direction is fixed relative to the push block, and the other end is fixedly connected to the first moving contact and the second moving contact.

11. The relay according to claim 10, characterized in that, The elastic component includes two springs arranged along the second direction; the two springs are respectively disposed corresponding to the first moving contact and the second moving contact and each includes a first connecting part, a second connecting part and a deformation part; the deformation part is connected between the first connecting part and the second connecting part, the first connecting parts of the two springs are connected as one piece and abut against the push block and are fixed relative to the push block, the second connecting part of one spring is fixedly connected to the first moving contact, and the second connecting part of the other spring is fixedly connected to the second moving contact.

12. The relay according to claim 6, characterized in that, The vertical part is provided with a slot, and the push block is provided with a plug-in part. The plug-in part is limited to the slot so that the push block is fixedly connected to the vertical part.

13. The relay according to claim 4, characterized in that, The protrusion is disposed on the side of the first moving contact member facing the stationary contact assembly; when the moving contact assembly is in the closed position, the bracket can separate from the protrusion; when the pusher 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.

14. The relay according to any one of claims 1 to 13, characterized in that, The first movable contact and the second movable contact have the same extending direction. 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. 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.

15. An electricity meter, characterized in that, The relay includes any one of claims 1 to 14.

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