switch

Abstract

A switch comprises a housing, a handle arranged on the housing, a first wiring terminal, a second wiring terminal, a movable contact assembly and a stationary contact, an operating mechanism connecting the movable contact assembly and the handle, and a terminal over-temperature protection mechanism in the housing, the terminal over-temperature protection mechanism comprising a bimetallic strip between the handle and the stationary contact in the vertical direction, the bimetallic strip comprising a metal connecting end and a first driving end, the metal connecting end being connected with the first wiring terminal, the first driving end extending obliquely upward towards the operating mechanism, when the bimetallic strip is heated to make the first driving end bend, the first driving end directly triggers the operating mechanism to trip. Not only can the temperature of the wiring terminal be monitored, but also the operating mechanism is directly triggered to trip when the temperature is too high without the need to increase other transmission components, and the layout is reasonable without the need to change the structural layout of the existing switch.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a switch. Background Technology

[0002] In low-voltage terminal type miniature switches, overload protection devices and short-circuit protection devices are usually not installed, but the temperature of the switch terminals may be high, so there is an urgent need for a device to monitor the temperature of the terminals. Utility Model Content

[0003] The purpose of this invention is to overcome at least one defect of the prior art and provide a switch capable of monitoring the temperature of the wiring terminals.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This application provides a switch, including a housing and a handle disposed on the housing, a first terminal, a second terminal, a moving contact assembly and a stationary contact, and an operating mechanism connecting the moving contact assembly and the handle. The first terminal is electrically connected to the stationary contact, and the second terminal is electrically connected to the moving contact assembly. The operating mechanism is driven by the handle to cause the operating mechanism to drive the moving contact assembly to actuate, contacting or disconnecting from the stationary contact.

[0006] The switch also includes a terminal over-temperature protection mechanism located inside the housing. The terminal over-temperature protection mechanism includes a bimetallic strip located vertically between the handle and the stationary contact. The bimetallic strip includes a metal connection end and a first driving end. The metal connection end is connected to a first terminal block. The first driving end extends obliquely upward toward the operating mechanism. When the bimetallic strip is heated and causes the first driving end to bend, the first driving end directly triggers the operating mechanism to trip.

[0007] In one possible implementation, the metal connection end of the bimetallic strip is directly connected to the first terminal block.

[0008] In one possible implementation, the first terminal block includes a first extended boss, with the bimetallic strip and the stationary contact respectively fixedly connected to the first extended boss; or, the stationary contact is fixedly connected to the first extended boss, and the bimetallic strip is fixedly connected to the stationary contact.

[0009] In one possible implementation, an arc-extinguishing chamber is further included. In the horizontal direction, the bimetallic strip is arranged side-by-side with the operating mechanism. The first and second terminals are located on opposite sides of the housing in the horizontal direction. The arc-extinguishing chamber is located between the first and second terminals. The stationary contact of the stationary contact and the moving contact assembly are located between the arc-extinguishing chamber and the second terminal. An arc-initiating structure is provided between the arc-extinguishing chamber and the second terminal. In the vertical direction, the handle is located above the housing, the stationary contact is located between the arc-extinguishing chamber and the handle, the bimetallic strip is located between the handle and the stationary contact, and the operating mechanism is located above the arc-initiating structure.

[0010] In one possible implementation, the stationary contact includes a first connecting segment, a second connecting segment, and an arc-leading segment connected by a bend. The first connecting segment is horizontally arranged, and the second connecting segment is vertically arranged. The end of the first connecting segment away from the second connecting segment is a stationary connecting end, which is fixedly connected to a first terminal block. The metal connecting end is set at an obtuse angle to the first driving end and is fixedly connected to the stationary connecting end, such that the first connecting segment and the first driving end are set at an angle.

[0011] In the vertical direction, the first connecting section of the stationary contact is located between the arc-extinguishing chamber and the handle, and the bimetallic strip is located between the handle and the first connecting section of the stationary contact. In the horizontal direction, the arc-inducing section of the stationary contact is located between the arc-extinguishing chamber and the second connecting section of the stationary contact, and the stationary contact point is located on the side of the second connecting section facing away from the arc-extinguishing chamber.

[0012] In one possible implementation, the arc-initiating structure includes an arc-initiating segment of a stationary contact, a moving arc-initiating element, and a plurality of spaced-apart arc-shaped guide ribs. The moving arc-initiating element includes a first horizontal segment, a first inclined segment, a first vertical segment, and a second horizontal segment that are bent and connected. The first horizontal segment and the first inclined segment form an obtuse angle, and the first inclined segment and the first vertical segment also form an obtuse angle. The first horizontal segment extends at least partially below the arc-extinguishing chamber. The first inclined segment, the first vertical segment, and the second horizontal segment are located between the arc-extinguishing chamber and the second terminal. When the switch is in the open state, the end of the moving contact assembly with the moving contact point is located above the second horizontal segment and corresponds to it. When the switch is in the closed state, the end of the moving contact assembly with the moving contact point is away from the second horizontal segment.

[0013] In one possible implementation, the operating mechanism includes a linkage, a locking element, a jumper element, and a connecting rod. The moving contact assembly includes a moving contact and a contact support. The contact support is fixedly connected to the end of the moving contact away from the moving contact. The linkage is rotatably configured. The contact support is rotatably connected to the linkage, and a contact spring is provided between the contact support and the linkage. The locking element and the jumper element are rotatably configured on the linkage, and the locking element and the jumper element are locked together by a latching engagement. The connecting rod connects the handle and the jumper element. A first elastic element acts on the linkage. When the moving contact contacts the stationary contact and the terminal temperature is too high, the bimetallic strip is heated and bent, directly driving the locking element to rotate, releasing the latching engagement between the locking element and the jumper element. The first elastic element releases energy, driving the linkage to rotate, causing the moving contact to separate from the stationary contact.

[0014] In one possible implementation, the two opposite sides of the contact support are a first contact support side and a second contact support side. The first contact support side includes a first mounting groove, and the first mounting groove is provided with a second rotating shaft. The linkage is rotatably mounted in the first mounting groove via the second rotating shaft. The second contact support side includes a second mounting groove, and the contact spring is located in the second mounting groove.

[0015] The two opposite sides of the linkage are the first side and the second side of the linkage. The first side of the linkage is provided with a limiting platform. One end of the first elastic member is located on the limiting platform, and the other end abuts against the housing. The second side of the linkage is provided with a third mounting groove. The locking member is at least partially located in the third mounting groove. The third mounting groove is provided with a first rotating shaft and a third rotating shaft. The jump fastener is rotatably mounted on the third rotating shaft, and the locking member is rotatably mounted on the first rotating shaft. The second side of the linkage is provided with a limiting boss. The second rotating shaft extends from the limiting boss and limits the rotation angle of the locking member when the switch is closed.

[0016] In one possible implementation, the operating mechanism further includes a splicing component and a connecting component. The splicing component is spliced ​​with the locking component along the thickness direction of the switch to clamp the linkage component. A first splicing portion is provided on the side of the splicing component facing away from the locking component, and a second splicing portion is provided on the side of the locking component facing away from the splicing component.

[0017] Two drive through holes are provided on both sides of the shell in the thickness direction. The connector passes through the drive through holes of two adjacent switches and connects to the first splicing part and the second splicing part respectively, so that the locking parts of at least two switches are linked.

[0018] In one possible implementation, the locking element is a fan-shaped structure, including a fan-shaped plate and a drive arm. An arc-shaped groove is provided between the fan-shaped plate and the drive arm, and the arc-shaped groove is recessed into the fan-shaped plate to form a locking slot. The locking element includes a first drive part, and the drive arm includes a second drive part. The first drive part and the second drive part are driven to engage.

[0019] The arc-shaped groove and the drive arm are located at the locking end of the locking member, which also includes a second drive end that drives and engages with the first drive end of the bimetallic strip.

[0020] The locking element and the linkage element are rotatably connected by a first rotating shaft located between the locking end and the second driving end.

[0021] Compared to existing technologies, the switch in this application includes a terminal over-temperature protection mechanism. This mechanism includes a bimetallic strip located vertically between the handle and the stationary contact. The bimetallic strip includes a metal connecting end and a first driving end. The metal connecting end is connected to a first terminal block. The first driving end extends obliquely upwards toward the operating mechanism. When the bimetallic strip is heated, causing the first driving end to bend, the first driving end directly triggers the operating mechanism to trip. The bimetallic strip does not need to be connected to the main circuit. The first terminal block acts as a thermal element, and the bimetallic strip can monitor the temperature of the first terminal block and directly trigger the operating mechanism to trip. This not only monitors the temperature of the terminal block but also directly triggers the operating mechanism to trip when the temperature is too high, eliminating the need for additional transmission components. Furthermore, the layout is reasonable and does not require changes to the existing switch structure.

[0022] In addition, the bimetallic strip is directly connected to the terminal block. When the circuit overheats, the bimetallic strip can bend and deform directly due to the heat from the terminal block, directly triggering the tripping of the operating mechanism. The bimetallic strip is directly connected to the terminal block, which can directly reflect the temperature of the terminal block. It has good heat conduction, timely disconnection, and higher sensitivity. At the same time, it can also avoid the influence of the heat generated by other components inside the switch, resulting in higher disconnection accuracy.

[0023] In addition, the first terminal block includes a first extended boss, and the bimetallic strip and / or the stationary contact are fixedly connected to the first extended boss. The first extended boss facilitates the fixed installation of the bimetallic strip and the stationary contact.

[0024] Furthermore, the arc-initiating structure includes an arc-initiating section of a stationary contact, a moving arc-initiating element, and multiple spaced-apart arc-shaped guide ribs. The moving arc-initiating element includes a first horizontal section, a first inclined section, a first vertical section, and a second horizontal section that are bent and connected. The first horizontal section and the first inclined section form an obtuse angle, and the first inclined section and the first vertical section also form an obtuse angle. When the switch is in the open position, the end of the moving contact assembly with the moving contact point is located above and corresponds to the second horizontal section of the moving arc-initiating element. This facilitates the arc on the moving contact jumping to the second horizontal section when the switch is opened and being introduced into the arc-extinguishing chamber through the moving arc-initiating element, thereby improving the arc-initiating efficiency. The multiple spaced-apart arc-shaped guide ribs facilitate the introduction of the high-temperature gas generated by the arc into the arc-extinguishing chamber. Attached Figure Description

[0025] Figure 1 and Figure 2 These are schematic diagrams of the front and back of the switch of this utility model, respectively.

[0026] Figure 3 This is a schematic diagram of the internal structure of the switch in the open state of this utility model;

[0027] Figure 4 This is a schematic diagram of the internal structure of the switch in the closed state of this utility model;

[0028] Figure 5 This is a schematic diagram of the position and structure of the internal components in the open state of the switch of this utility model;

[0029] Figure 6 and Figure 8 These are schematic diagrams of the two opposite sides of the switch moving contact assembly of this utility model;

[0030] Figure 7 and Figure 9 These are schematic diagrams of the opposite sides of the switch moving contact assembly and linkage component after installation of this utility model.

[0031] Figure 10 This is a schematic diagram of the structure of the switch moving contact assembly, linkage component and locking component after installation of this utility model;

[0032] Figure 11 This is a schematic diagram of the installation structure of the switch splicing component and the locking component of this utility model;

[0033] Figure 12 This is a structural schematic diagram of the switch lock fastener of this utility model;

[0034] The reference numerals in the attached figures include:

[0035] Handle 1;

[0036] Terminal 2;

[0037] First terminal block 21; First extension boss 211; Wiring screw 212; Terminal block 213;

[0038] Second terminal 22;

[0039] Arc-extinguishing chamber 3;

[0040] Moving contact assembly 4;

[0041] Moving contact 41; Contact support 42; Moving contact 43;

[0042] First mounting slot 421; second rotating shaft 422; second mounting slot 423; contact spring 424;

[0043] Static contact 5;

[0044] First connecting section 51; Second connecting section 52; Arc-leading section 53; Stationary contact 54;

[0045] First elastic element 6;

[0046] Operating mechanism 7;

[0047] Linkage component 71;

[0048] Limiting platform 711; third mounting slot 712; first rotating shaft 713; third rotating shaft 714; limiting boss 715;

[0049] Locking fastener 72;

[0050] Drive arm 721; arc-shaped groove 722; bayonet 723; second drive part 724; second drive end 725; second splicing part 726;

[0051] Jump fastener 73;

[0052] First drive unit 731;

[0053] Linkage 74;

[0054] 75 splicing parts;

[0055] First splicing part 751; drive via 752;

[0056] Bimetallic strip 8;

[0057] First driving end 81; metal connection end 82.

[0058] Moving arc-drawing component 9;

[0059] First horizontal segment 91; First inclined segment 92; First vertical segment 93; Second horizontal segment 94; Second vertical segment 95; Arc-shaped guide rib 96. Detailed Implementation

[0060] The specific embodiments of this utility model are further described below with reference to the accompanying drawings. The scope of protection of this utility model is not limited to the description of the following embodiments.

[0061] like Figures 1-12 As shown, this application provides a switch, including a housing and a handle 1 disposed on the housing, at least two terminals 2, an arc-extinguishing chamber 3, a moving contact assembly 4 and a stationary contact 5, and an operating mechanism 7 connecting the moving contact assembly 4 and the handle 1. The first terminal 21 is electrically connected to the stationary contact 5, and the second terminal 22 is electrically connected to the moving contact assembly 4. The operating mechanism 7 is driven by the handle 1, causing the operating mechanism 7 to drive the moving contact assembly 4 to actuate, making contact with or disconnecting from the stationary contact 5, thereby completing the circuit connection and disconnection. The switch in this embodiment is an isolating switch, and the switches of this application include, but are not limited to, circuit breakers and isolating switches.

[0062] In the horizontal direction, i.e., the second direction, the bimetallic strip 8 and the operating mechanism 7 are arranged side by side. The first terminal 21 and the second terminal 22 are located on both sides of the horizontal direction inside the housing. The arc-extinguishing chamber 3 is located between the first terminal 21 and the second terminal 22. The stationary contact 54 of the stationary contact 5 and the moving contact 43 of the moving contact assembly 4 are located between the arc-extinguishing chamber 3 and the second terminal 22. An arc-inducing structure is provided between the arc-extinguishing chamber 3 and the second terminal 22. In the vertical direction, i.e., the first direction, the handle 1 is located above the housing. The stationary contact 5 is located between the arc-extinguishing chamber 3 and the handle 1. The bimetallic strip 8 is located between the handle 1 and the stationary contact 5. The operating mechanism 7 is located above the arc-inducing structure.

[0063] The improvement of this application lies in the provision of a terminal over-temperature protection mechanism. The switch also includes a terminal over-temperature protection mechanism located inside the housing. The terminal over-temperature protection mechanism includes a bimetallic strip 8 located vertically between the handle 1 and the stationary contact 5. The bimetallic strip 8 is driven and cooperates with the operating mechanism 7. When the circuit temperature is too high, the bimetallic strip 8 deforms due to heat, driving the operating mechanism 7 to trip, causing the operating mechanism 7 to drive the moving contact assembly 4 to move, separate from the stationary contact 5, cut off the circuit, and protect the circuit.

[0064] The bimetallic strip 8 includes a metal connecting end 82 and a first driving end 81. The metal connecting end 82 is connected to a first terminal 21. The first driving end 81 extends obliquely upward toward the operating mechanism 7. When the bimetallic strip 8 is heated, causing the first driving end 81 to bend, the first driving end 81 directly triggers the operating mechanism 7 to disengage. The second direction is perpendicular to the first direction.

[0065] This application's switch includes a terminal over-temperature protection mechanism. The terminal over-temperature protection mechanism includes a bimetallic strip 8 located vertically between the handle 1 and the stationary contact 5. The bimetallic strip 8 includes a metal connection end 82 and a first driving end 81. The metal connection end 82 is connected to a first terminal 21. The first driving end 81 extends obliquely upward toward the operating mechanism. When the bimetallic strip 8 is heated, causing the first driving end 81 to bend, the first driving end 81 directly triggers the operating mechanism to trip. The bimetallic strip 8 does not need to be connected to the main circuit. The first terminal 21 serves as a thermal element. The bimetallic strip 8 can monitor the temperature of the first terminal 21 and can directly trigger the operating mechanism to trip. It can not only monitor the temperature of the terminal but also directly trigger the operating mechanism to trip when the temperature is too high, without adding other transmission components. Moreover, the layout is reasonable and does not require changing the existing switch structure.

[0066] like Figure 3 and Figure 4 As shown, the stationary contact 5 includes a first connecting section 51, a second connecting section 52, and an arc-inducing section 53 connected by bending. The first connecting section 51 is horizontally arranged, and the second connecting section 52 is vertically arranged. The stationary contact 54 is located on the side of the second connecting section 52 facing away from the arc-extinguishing chamber 3. The end of the first connecting section 51 away from the second connecting section 52 is the stationary connection end. The end of the bimetallic strip 8 near the operating mechanism 7 is the first driving end 81, and the end away from the operating mechanism 7 is the metal connection end 82. At least two terminals 2 include a first terminal 21 and a second terminal 22. The stationary connection end is fixedly connected to the first terminal 21. The metal connection end 82 is set at an obtuse angle to the first driving end 81. The metal connection end 82 is fixedly connected to the stationary connection end, so that the first connecting section 51 and the first driving end 81 are set at an angle.

[0067] Preferred, such as Figure 3 and Figure 5As shown, the arc-initiating structure includes an arc-initiating segment 53 of a stationary contact 5, a moving arc-initiating element 9, and multiple spaced-apart arc-shaped guide ribs 96. The moving arc-initiating element 9 includes a first horizontal segment 91, a first inclined segment 92, a first vertical segment 93, a second horizontal segment 94, and a second vertical segment 95 connected by bending. The first horizontal segment 91 and the first inclined segment 92 form an obtuse angle, and the first inclined segment 92 and the first vertical segment 93 also form an obtuse angle. The first horizontal segment 91 extends at least partially below the arc-extinguishing chamber 3. The first inclined segment 92, the first vertical segment 93, and the second horizontal segment 94 are located in the arc-extinguishing chamber 3 and the second contact 5. Between the terminals 22, when the switch is in the closed state, the moving contact 43 of the moving contact assembly 4 contacts the stationary contact 54 of the stationary contact 5, away from the second horizontal section 94. When the switch is in the open state, the end of the moving contact assembly 4 with the moving contact 43 is located above the second horizontal section 94 and corresponds to the second horizontal section 94. By setting the second horizontal section 94, the arc on the moving contact 41 is facilitated to jump to the second horizontal section 94 when the switch is opened, and is introduced into the arc extinguishing chamber 3 through the moving arc ignition element 9, thereby improving the arc ignition efficiency. Multiple spaced arc-shaped guide ribs 96 are located on the housing, which facilitates the introduction of the high-temperature gas generated by the arc into the arc extinguishing chamber 3.

[0068] Furthermore, the second terminal 22 is connected to the moving arc-leading member 9. In one embodiment, the second terminal 22 includes a terminal cavity and a pressure plate located inside the terminal cavity. The pressure plate is fixedly connected to the second vertical section 95 of the moving arc-leading member 9. In another embodiment, the moving arc-leading member 9 does not have a second vertical section 95, and the second horizontal section 94 extends into the terminal cavity of the second terminal 22.

[0069] Preferred, such as Figure 5 As shown, the first terminal block 21 includes a terminal block 213 and a terminal screw 212 mounted on the terminal block 213. The top side of the terminal block 213 is provided with a first extending boss 211. The bimetallic strip 8 and the stationary contact 5 are respectively fixedly connected to the first extending boss 211 and can be installed on both sides of the first extending boss 211. Alternatively, the stationary contact 5 can be fixedly connected to the first extending boss 211, and the bimetallic strip 8 can be fixedly connected to the stationary contact 5. The first extending boss 211 facilitates the fixed installation of the bimetallic strip 8 and the stationary contact 5.

[0070] In a preferred embodiment of this application, the stationary connection end is fixedly connected to the first terminal 2, and the metal connection end 82 is fixedly connected to the stationary connection end, so that the bimetallic strip 8 and the first connecting section 51 of the stationary contact 5 form an angle. When the bimetallic strip 8 is heated and deformed, the first driving end 81 triggers the operating mechanism 7 to disengage. That is, when the bimetallic strip 8 is heated and the first driving end 81 bends, the first driving end 81 moves closer to the stationary contact 5 and contacts the locking member 72 of the operating mechanism 7, driving the locking member 72 to rotate. The locking member 72 drives the jumper 73 to rotate and unlock.

[0071] In another embodiment, the bimetallic strip 8 is directly connected to the first terminal 2. When the circuit overheats, the bimetallic strip can bend and deform directly due to the heat of the terminal, triggering the tripping of the operating mechanism. Since the bimetallic strip is directly connected to the terminal, it can directly reflect the temperature of the terminal, resulting in good heat conduction, timely disconnection, and higher sensitivity. At the same time, it can also avoid the influence of the heat generated by other components inside the switch, resulting in higher disconnection accuracy.

[0072] Furthermore, such as Figure 5 As shown, the operating mechanism 7 includes a linkage 71, a locking element 72, a jumper element 73, and a connecting rod 74. The moving contact assembly 4 includes a moving contact 41 and a contact support 42. The contact support 42 is fixedly connected to the end of the moving contact 41 away from the moving contact 43. The linkage 71 is rotatably disposed. The contact support 42 is rotatably connected to the linkage 71, and a contact spring 424 is provided between the contact support 42 and the linkage 71. The locking element 72 and the jumper element 73 are respectively rotatably disposed on the linkage 71, and the locking element 72 and the jumper element 73 are locked together by a latching engagement. The connecting rod 74 is connected between the handle 1 and the jumper element 73. A first elastic element 6 is connected between the linkage 71 and the housing. The first elastic element 6 acts on the linkage 71. When the locking element 72 and the jumper element 73 are released from their latching engagement, the first elastic element 6 drives the linkage 71 to rotate and separate the moving contact 41 from the stationary contact 5, thus completing the over-temperature tripping of the switch. The first elastic element 6 acts on the linkage element 71.

[0073] Furthermore, in this embodiment of the application, the switch is an isolating switch. For example... Figure 3 and Figure 4 As shown, Figure 3 This is a schematic diagram of the disconnector switch in the open state. Figure 4This is a schematic diagram of the disconnector switch in the closed state. During manual closing, the drive handle 1 drives the trip fastener 73 via the connecting rod 74. Since the locking fastener 72 and the trip fastener 73 are interlocked, the handle 1 can drive the linkage 71 to rotate via the connecting rod 74. The linkage 71 drives the moving contact assembly 4 to rotate, causing the moving contact 41 to contact or disconnect from the stationary contact 5. When the linkage 71 rotates and causes the moving contact 41 to contact the stationary contact 5, it compresses the first elastic element 6, storing energy in the first elastic element 6. When the disconnector switch trips due to over-temperature, the bimetallic strip 8 deforms due to heat and bends towards the stationary contact 5. The first driving end 81 of the bimetallic strip 8 drives the locking fastener 72 to rotate, and the locking fastener 72 drives the trip fastener 73 to rotate. After the trip fastener 73 passes the equilibrium position, it unlocks. The first elastic element 6 drives the moving contact 41 to rotate, causing the moving contact 41 to separate from the stationary contact 5, completing the over-temperature trip of the disconnector switch.

[0074] Furthermore, such as Figure 4 As shown, the bimetallic strip 8 is driven to cooperate with the locking element 72. The bimetallic strip 8 is directly connected to the first terminal 21. When the moving contact 41 contacts the stationary contact 5 and the temperature of the first terminal 21 is too high, the temperature of the first terminal 21 is directly transferred to the bimetallic strip 8, causing the bimetallic strip 8 to bend due to heat and drive the operating mechanism 7 to disengage. That is, the bending of the bimetallic strip 8 due to heat directly drives the locking element 72 to rotate, releasing the latching cooperation between the locking element 72 and the jumper 73, causing the operating mechanism 7 to disengage. The first elastic element 6 releases energy and drives the linkage element 71 to rotate, causing the moving contact 41 to separate from the stationary contact 5. The bimetallic strip 8 is directly connected to the first terminal 21 and is not directly connected to the circuit. The first terminal 21 acts as a thermal element, and the bimetallic strip 8 can directly monitor the temperature of the first terminal 21. It has good thermal conductivity, timely disconnection, and higher sensitivity. At the same time, it can also avoid the influence of the heating of other components inside the disconnecting switch, resulting in higher disconnection accuracy. The first elastic element 6 can be a compression spring, torsion spring, tension spring, or spring, etc. In this embodiment, the first elastic element 6 is a compression spring.

[0075] Furthermore, such as Figure 6 and Figure 7 As shown, the contact support 42 is rotatably connected to the linkage 71. The two opposite sides of the contact support 42 are a first contact support surface and a second contact support surface. The first contact support surface includes a first mounting groove 421, which is provided with a second rotating shaft 422. The linkage 71 is rotatably mounted via the second rotating shaft 422 and is at least partially within the first mounting groove 421, allowing it to rotate a certain angle within the first mounting groove 421. Figure 8 and Figure 9As shown, the second surface of the contact support includes a second mounting groove 423, within which a contact spring 424 is disposed. The contact spring 424 is driven to connect between the contact support 42 and the linkage 71, providing overtravel for the contact between the moving contact 41 and the stationary contact 54. The contact spring 424 can be a compression spring, torsion spring, tension spring, or other springs. In this embodiment, the contact spring 424 is a torsion spring. The two connecting sections of the contact spring 424 abut against the linkage 71 and the contact support 42, respectively.

[0076] Preferred, such as Figure 7 , Figure 9 and Figure 10 As shown, the linkage 71 is rotatably connected to the locking member 72. The two opposite sides of the linkage 71 are the first side and the second side of the linkage, respectively. The first side of the linkage is provided with a limiting platform 711 (e.g., Figure 9 As shown), one end of the first elastic member 6 is located on the limiting platform 711, and the other end abuts against the housing; the second surface of the linkage member is provided with a third mounting groove 712 (as shown). Figure 7 As shown), the locking element 72 is at least partially located within the third mounting groove 712 (as shown). Figure 10 As shown in the figure, the third mounting groove 712 is provided with a first rotating shaft 713 and a third rotating shaft 714. The jump fastener 73 is rotatably mounted on the third rotating shaft 714, and the locking fastener 72 is rotatably mounted on the first rotating shaft 713. The second side of the linkage is provided with a limiting boss 715. The second rotating shaft 422 extends from the limiting boss 715 and limits the rotation angle of the locking fastener 72 when the switch is closed.

[0077] Preferably, the switch is a modular design, with multiple switches stacked together, and can be installed in multi-pole circuits, such as three-phase three-wire, three-phase four-wire, or two-phase circuits.

[0078] Specifically, such as Figure 11 As shown, the operating mechanism 7 also includes a splicing component 75, which is spliced ​​with the locking component 72 along the thickness direction of the switch to clamp the linkage component 71. The splicing component 75 has a first splicing part 751 for splicing and installing multiple switches with locking components 72 on the side facing away from the locking component 72, and the locking component 72 has a second splicing part 726 on the side facing away from the splicing component 75.

[0079] In one embodiment, the first splicing part 751 is a splicing groove, and the second splicing part 726 is a splicing protrusion; or, the first splicing part 751 is a splicing protrusion, and the second splicing part 726 is a splicing groove, and the splicing protrusion and the splicing groove are spliced ​​together to enable the linkage of the locking fasteners 72 of two adjacent switches.

[0080] Or, such as Figure 1 , Figure 2 , Figure 11 and Figure 12 As shown, in this embodiment, a connector (not shown in the figure) is provided between the two switches. The first splicing part 751 and the second splicing part 726 are both splicing grooves. The connector connects the first splicing part 751 and the second splicing part 726, so that the locking parts 72 of adjacent switches are linked. When one switch trips due to overheating, it will cause multiple switches to trip simultaneously, thus improving safety. Of course, the first splicing part 751 and the second splicing part 726 can also be splicing protrusions.

[0081] Furthermore, such as Figure 1 and Figure 2 As shown, two drive through holes 752 are provided on both sides of the housing in the thickness direction. The connector passes through the drive through holes 752 of two adjacent switches and connects to the first splicing part 751 and the second splicing part 726 respectively, so that the locking parts 72 of at least two switches are linked.

[0082] Specifically, such as Figure 12 As shown, the locking element 72 has a fan-shaped structure, including a fan-shaped plate and a drive arm 721. An arc-shaped groove 722 is provided between the fan-shaped plate and the drive arm 721. The arc-shaped groove 722 is recessed into the fan-shaped plate to form a latch 723, as shown. Figure 5 As shown, the jump fastener 73 includes a first driving part 731, and the driving arm 721 includes a second driving part 724. The first driving part 731 and the second driving part 724 drive each other. The arc-shaped groove 722 and the driving arm 721 are located at the locking end of the locking fastener 72. The locking fastener 72 also includes a second driving end 725 that drives each other with the first driving end 81 of the bimetallic strip 8. The second driving end 725 and the locking end are located at both ends of the length direction of the locking fastener 72.

[0083] like Figure 5 As shown, the locking element 72 and the linkage element 71 are rotatably connected by the first rotating shaft 713. The first rotating shaft 713 is located between the locking end of the locking element 72 and the second driving end 725. The locking element 72 and the linkage element 71 rotate relative to each other around the first rotating shaft 713.

[0084] like Figures 3-5 As shown, when the switch is closed, the handle 1 drives the trip fastener 73 to rotate while simultaneously driving the linkage 71 to rotate, compressing the first elastic element 6 and storing energy in it. The linkage 71 drives the moving contact 41 to rotate towards the stationary contact 5. After the trip fastener 73 rotates and the first driving part 731 abuts against the second driving part 724 of the locking part 72, the locking part 72 and the linkage 71 rotate relative to each other. After the moving contact 41 contacts the stationary contact 5, the trip fastener 73 rotates into the arc-shaped groove 722 of the locking part 72. The latch 723 of the arc-shaped groove 722 limits the trip fastener 73, and the moving contact 41 is limited to the closed state. The switch completes the closing operation.

[0085] When the switch changes from the closed state to the open state, the handle 1 drives the trip fastener 73 to rotate and simultaneously drives the linkage 71 to rotate. The linkage 71 drives the moving contact 41 to rotate away from the stationary contact 5. The rotation of the trip fastener 73 causes the first driving part 731 to separate from the second driving part 724 of the locking part 72. The locking part 72 and the linkage 71 rotate relative to each other. After the trip fastener 73 disengages from the arc-shaped groove 722 of the locking part 72, the first elastic element 6 releases energy, driving the linkage 71 to rotate rapidly, so that the switch opens quickly.

[0086] When the switch transitions from the closed state to the tripped state, the bimetallic strip 8 deforms due to heat and bends towards the stationary contact 5. The first driving end 81 of the bimetallic strip 8 drives the locking member 72 to rotate around the first rotating shaft 713. The locking member 72 and the linkage member 71 rotate relative to each other, causing the second driving part 724 of the locking member 72 to separate from the first driving part 731 of the tripping member 73. The tripping member 73 then disengages from the arc-shaped groove 722 of the locking member 72. The first elastic member 6 releases energy, driving the linkage member 71 to drive the moving contact 41 to rotate rapidly, causing the moving contact 41 to separate from the stationary contact 5, thus realizing the over-temperature tripping of the switch.

[0087] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0088] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A switch, comprising a housing and a handle (1) disposed on the housing, a first terminal (21), a second terminal (22), a moving contact assembly (4) and a stationary contact (5), and an operating mechanism (7) connecting the moving contact assembly (4) and the handle (1), wherein the first terminal (21) is electrically connected to the stationary contact (5), the second terminal (22) is electrically connected to the moving contact assembly (4), and the operating mechanism (7) is driven by the handle (1) to drive the moving contact assembly (4) to actuate and contact or disconnect from the stationary contact (5); Its features are, The switch also includes a terminal over-temperature protection mechanism located inside the housing. The terminal over-temperature protection mechanism includes a bimetallic strip (8) located in the vertical direction between the handle (1) and the stationary contact (5). The bimetallic strip (8) includes a metal connection end (82) and a first driving end (81). The metal connection end (82) is connected to the first terminal (21). The first driving end (81) extends obliquely upward toward the operating mechanism (7). When the bimetallic strip (8) is heated and causes the first driving end (81) to bend, the first driving end (81) directly triggers the operating mechanism (7) to trip.

2. The switch according to claim 1, characterized in that, The metal connection end (82) of the bimetallic strip (8) is directly connected to the first terminal (21).

3. The switch according to claim 1, characterized in that, The first terminal block (21) includes a first extension boss (211), the bimetallic strip (8) and the stationary contact (5) are respectively fixedly connected to the first extension boss (211), or the stationary contact (5) is fixedly connected to the first extension boss (211), and the bimetallic strip (8) is fixedly connected to the stationary contact (5).

4. The switch according to claim 1, characterized in that, It also includes an arc-extinguishing chamber (3). In the horizontal direction, the bimetallic strip (8) and the operating mechanism (7) are arranged side by side. The first terminal (21) and the second terminal (22) are located on both sides of the horizontal direction inside the housing. The arc-extinguishing chamber (3) is located between the first terminal (21) and the second terminal (22). The stationary contact (54) of the stationary contact (5) and the moving contact assembly (4) of the moving contact assembly (4) are located between the arc-extinguishing chamber (3) and the second terminal (22). An arc-inducing structure is provided between the arc-extinguishing chamber (3) and the second terminal (22). In the vertical direction, the handle (1) is located above the housing. The stationary contact (5) is located between the arc-extinguishing chamber (3) and the handle (1). The bimetallic strip (8) is located between the handle (1) and the stationary contact (5). The operating mechanism (7) is located above the arc-inducing structure.

5. The switch according to claim 4, characterized in that, The stationary contact (5) includes a first connecting section (51), a second connecting section (52), and an arc-drawing section (53) that are bent and connected. The first connecting section (51) is horizontally arranged, and the second connecting section (52) is vertically arranged. The end of the first connecting section (51) away from the second connecting section (52) is the stationary connecting end. The stationary connecting end is fixedly connected to the first terminal block (21). The metal connecting end (82) is set at an obtuse angle to the first driving end (81). The metal connecting end (82) is fixedly connected to the stationary connecting end, so that the first connecting section (51) and the first driving end (81) are set at an angle. In the vertical direction, the first connecting section (51) of the stationary contact (5) is located between the arc-extinguishing chamber (3) and the handle (1), and the bimetallic strip (8) is located between the handle (1) and the first connecting section (51) of the stationary contact (5). In the horizontal direction, the arc-inducing section (53) of the stationary contact (5) is located between the arc-extinguishing chamber (3) and the second connecting section (52) of the stationary contact (5), and the stationary contact point (54) is located on the side of the second connecting section (52) facing away from the arc-extinguishing chamber (3).

6. The switch according to claim 4, characterized in that, The arc-initiating structure includes an arc-initiating segment (53) of a stationary contact (5), a moving arc-initiating component (9), and multiple spaced-apart arc-shaped guide ribs (96). The moving arc-initiating component (9) includes a first horizontal segment (91), a first inclined segment (92), a first vertical segment (93), and a second horizontal segment (94) that are bent and connected. The first horizontal segment (91) and the first inclined segment (92) form an obtuse angle, and the first inclined segment (92) and the first vertical segment (93) form an obtuse angle. The first horizontal segment (91) has at least Part of it extends below the arc-extinguishing chamber (3). The first inclined section (92), the first vertical section (93), and the second horizontal section (94) are located between the arc-extinguishing chamber (3) and the second terminal (22). When the switch is in the open state, one end of the moving contact assembly (4) with the moving contact (43) is located above the second horizontal section (94) and corresponds to the second horizontal section (94). When the switch is in the closed state, one end of the moving contact assembly (4) with the moving contact (43) is away from the second horizontal section (94).

7. The switch according to claim 1, characterized in that, The operating mechanism (7) includes a linkage (71), a locking element (72), a jumper (73), and a connecting rod (74). The moving contact assembly (4) includes a moving contact (41) and a contact support (42). The contact support (42) is fixedly connected to the end of the moving contact (41) away from the moving contact (43). The linkage (71) is rotatably disposed. The contact support (42) is rotatably connected to the linkage (71), and a contact spring (424) is provided between the contact support (42) and the linkage (71). The locking element (72) and the jumper (73) are respectively rotatably disposed on the... On the linkage (71), the locking element (72) and the jumper (73) are locked together by a latch. The connecting rod (74) is connected between the handle (1) and the jumper (73). The first elastic element (6) acts on the linkage (71). When the moving contact (41) contacts the stationary contact (5) and the terminal (2) is too hot, the bimetallic strip (8) is heated and bent, directly driving the locking element (72) to rotate, releasing the latching engagement between the locking element (72) and the jumper (73). The first elastic element (6) releases energy to drive the linkage (71) to rotate, causing the moving contact (41) to separate from the stationary contact (5).

8. The switch according to claim 7, characterized in that, The two opposite sides of the contact support (42) are a first contact support surface and a second contact support surface, respectively. The first contact support surface includes a first mounting groove (421), and the first mounting groove (421) is provided with a second rotating shaft (422). The linkage (71) is rotatably mounted in the first mounting groove (421) through the second rotating shaft (422). The second contact support surface includes a second mounting groove (423), and the contact spring (424) is located in the second mounting groove (423). The two opposite sides of the linkage (71) are the first side and the second side of the linkage. The first side of the linkage is provided with a limiting platform (711). One end of the first elastic member (6) is located on the limiting platform (711), and the other end abuts against the housing. The second side of the linkage is provided with a third mounting groove (712). The locking member (72) is at least partially located in the third mounting groove (712). The third mounting groove (712) is provided with a first rotating shaft (713) and a third rotating shaft (714). The jump fastener (73) is rotatably mounted on the third rotating shaft (714), and the locking member (72) is rotatably mounted on the first rotating shaft (713). The second side of the linkage is provided with a limiting boss (715). The second rotating shaft (422) extends from the limiting boss (715) to limit the rotation angle of the locking member (72) when the switch is closed.

9. The switch according to claim 7, characterized in that, The operating mechanism (7) further includes a splicing component (75) and a connecting component. The splicing component (75) is spliced ​​with the locking component (72) along the thickness direction of the switch to clamp the linkage component (71). The splicing component (75) has a first splicing part (751) on the side facing away from the locking component (72), and the locking component (72) has a second splicing part (726) on the side facing away from the splicing component (75). Two drive through holes (752) are provided on both sides of the shell in the thickness direction. The connector passes through the drive through holes (752) of two adjacent switches and connects to the first splicing part (751) and the second splicing part (726) respectively, so that the locking parts (72) of at least two switches are linked.

10. The switch according to claim 7, characterized in that, The locking element (72) has a fan-shaped structure, including a fan-shaped plate and a drive arm (721). An arc-shaped groove (722) is provided between the fan-shaped plate and the drive arm (721). The arc-shaped groove (722) is recessed into the fan-shaped plate to form a bayonet (723). The jump fastener (73) includes a first drive part (731), and the drive arm (721) includes a second drive part (724). The first drive part (731) and the second drive part (724) drive each other. The arc-shaped groove (722) and the drive arm (721) are located at the locking end of the locking member (72). The locking member (72) also includes a second drive end (725) that drives and cooperates with the first drive end (81) of the bimetallic strip (8). The locking element (72) and the linkage element (71) are rotatably connected by a first rotating shaft (713) located between the locking end and the second driving end (725).

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