Arc extinguishing switch

Abstract

The invention discloses an arc extinguishing switch. The arc extinguishing switch comprises a swing assembly, a terminal assembly, a marble assembly and an arc extinguishing assembly. The swing assembly comprises a movable contact and a swing piece connected with the movable contact. The terminal assembly comprises a static contact. The marble assembly actuates the swing piece, so that the movable contact is close to or far away from the static contact; the arc extinguishing assembly is used for extinguishing electric arcs generated when the movable contact and the static contact are separated. The arc extinguishing switch disclosed by the invention can reduce adverse effects caused by arc ablation, prolong the service life and ensure electricity utilization safety.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and in particular to an arc extinguishing switch. Background Art

[0002] Wall switches generally refer to electrical switches installed on the wall, and are often used to control the on / off of lighting fixtures. When the wall switch is turned off, a strong electric field will be formed when the moving and static contacts are separated, which can easily cause an arc to be generated between the moving and static contacts. Especially for DC switches, since DC does not have a natural zero crossing point like AC, it is difficult to extinguish the DC arc naturally once it is generated.

[0003] Since the temperature of the arc is very high, reaching several thousand degrees Celsius, it will have a burning effect on the surface of the moving and static contacts, and increase the contact resistance of the moving and static contacts when they contact next time, seriously affecting the service life and electrical safety of the wall switch. Summary of the invention

[0004] In view of this, the present application provides an arc extinguishing switch, which can reduce the adverse effects caused by arc ablation, increase the service life, and ensure the safety of electricity use.

[0005] This application specifically adopts the following technical solutions:

[0006] The embodiment of the present application provides an arc extinguishing switch, which includes a swing assembly, a terminal assembly, a pin assembly and an arc extinguishing assembly;

[0007] The swing assembly includes a moving contact and a swing member connected to the moving contact;

[0008] The terminal assembly includes a stationary contact;

[0009] The pin assembly can actuate the swinging member, thereby making the moving contact point approach or move away from the static contact point;

[0010] The arc extinguishing assembly is used to extinguish the arc generated when the moving contact and the static contact are separated.

[0011] Optionally, the arc extinguishing assembly includes at least one magnetic component, and the at least one magnetic component is used to provide a magnetic field so that the arc moves away from the moving contact and the static contact, and is elongated to be extinguished.

[0012] Optionally, the arc extinguishing assembly comprises a pair of magnetic members, the pair of magnetic members are respectively located on opposite sides of the moving contact and the static contact, and the polarities of two adjacent magnetic poles between the pair of magnetic members are opposite;

[0013] The pair of magnetic members is used to drive the arc to move in a direction away from the swing support point of the swing member.

[0014] Optionally, the arc extinguishing assembly further comprises a first arc striking member and a second arc striking member, wherein the first arc striking member and the second arc striking member are both located in the moving direction of the arc;

[0015] The first arc-striking member is electrically connected to the static contact, and the second arc-striking member is electrically connected to the moving contact.

[0016] Optionally, the terminal assembly further comprises a conductor, the static contact and the first arc-starting member are both connected to the conductor, wherein the first arc-starting member protrudes from the conductor toward the movable contact;

[0017] and / or,

[0018] The second arc-starting member is connected to the swing member and protrudes from the swing member toward the static contact.

[0019] Optionally, the static contact is arranged at the free end of the conductor, and the first arc-starting member is formed by cutting a portion of the conductor and bending the portion toward a side of the conductor close to the moving contact;

[0020] and / or,

[0021] The second arc-starting member is formed by bending the end of the swing member close to the moving contact toward a side close to the stationary contact.

[0022] Optionally, when the static contact and the moving contact are in contact, there is a gap between the first arc-striking member and the second arc-striking member.

[0023] Optionally, the arc extinguishing assembly comprises a pair of magnetic members, the pair of magnetic members are respectively located on opposite sides of the moving contact and the static contact, and the polarities of two adjacent magnetic poles between the pair of magnetic members are the same;

[0024] Arc burning spaces are respectively arranged on both sides of each magnetic member, and the arc burning spaces are used to allow the electric arc to enter and move in the arc burning spaces.

[0025] Optionally, the arc extinguishing switch comprises a housing, wherein the housing has a first mounting structure for mounting the magnetic member, and a second mounting structure for mounting the terminal assembly;

[0026] The arcing space is formed between the first mounting structure and the second mounting structure.

[0027] Optionally, an exhaust hole is formed on the shell, and the exhaust hole is located in the moving direction of the arc.

[0028] Optionally, the arc extinguishing assembly further includes a heat insulating member, which is located in the moving direction of the electric arc and is used to isolate the electric arc from an injection molded part in the arc extinguishing switch.

[0029] Optionally, the thermal insulation member is a cavity structure with a U-shaped cross-section, and the arc is suitable for entering the thermal insulation member from the opening end of the U-shape.

[0030] Optionally, the heat insulating member comprises a first wall, a second wall and a third wall which are connected in sequence, and the first wall and the third wall are located on the same side of the second wall and are arranged opposite to each other;

[0031] The portion of the first wall that is farther from the second wall has a smaller wall thickness, and / or the portion of the third wall that is farther from the second wall has a smaller wall thickness.

[0032] Optionally, the swinging member is a seesaw;

[0033] The seesaw has an arc-shaped portion, and the pin assembly can slide on the arc-shaped portion to move the seesaw.

[0034] In the arc extinguishing switch provided in the embodiment of the present application, the positions of the moving contact and the static contact correspond, wherein the moving contact is arranged on the swinging member, and the static contact is arranged on the terminal assembly. When the pin assembly is subjected to an external force, the swinging member will be actuated to move, and then the swinging member will actuate the moving contact to gradually approach and contact the static contact to conduct the circuit; or, the swinging member will actuate the moving contact to separate from the static contact and gradually move away from the static contact to disconnect the circuit. Among them, the arc extinguishing switch also includes an arc extinguishing assembly. An arc is easily generated at the moment when the moving contact and the static contact are separated. The arc extinguishing assembly can extinguish the arc, thereby avoiding the erosion of the moving and static contacts by the high-temperature arc, improving the service life of the switch, and ensuring the safety of electricity use. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 It is a schematic diagram of the appearance of an arc extinguishing switch provided in an embodiment of the present application;

[0037] Figure 2 yes Figure 1 An exploded view of the arc-extinguishing switch is shown;

[0038] Figure 3 This is a schematic diagram of the arrangement position of an arc extinguishing component provided in an embodiment of the present application;

[0039] Figure 4 is a schematic diagram of the arrangement position of a magnetic component provided in an embodiment of the present application;

[0040] Figure 5 is a schematic diagram of the arrangement positions of the first arc-starting member and the second arc-starting member provided in an embodiment of the present application;

[0041] Figure 6 This is a schematic diagram of the structure of a first arc-starting member and a second arc-starting member provided in an embodiment of the present application;

[0042] Figure 7 is a schematic structural diagram of another first arc-starting member and a second arc-starting member provided in an embodiment of the present application;

[0043] Figure 8 is a schematic diagram of the relative positions of the first arc-starting member and the second arc-starting member provided in an embodiment of the present application;

[0044] Fig. 9 It is a schematic diagram of the arrangement position of an arc burning space provided in an embodiment of the present application;

[0045] Fig.10 is a schematic diagram of the arrangement of the arc burning space inside the housing provided in an embodiment of the present application;

[0046] Fig.11 is a schematic diagram of the arrangement position of the exhaust holes provided in the embodiment of the present application;

[0047] Fig.12 is a schematic diagram of the arrangement position of a heat insulating member inside a shell provided in an embodiment of the present application;

[0048] Fig.13 It is a structural schematic diagram of a heat insulation component provided in an embodiment of the present application;

[0049] Fig.14 It is a structural schematic diagram of a swing assembly provided in an embodiment of the present application;

[0050] Fig.15 It is a structural schematic diagram of a shell provided in an embodiment of the present application.

[0051] Reference numerals:

[0052] 1. Swing assembly; 11. Moving contact; 12. Swing member; 121. Arc portion; 122. Connecting portion; 123. Swing fulcrum;

[0053] 2. Terminal assembly; 21. Static contact; 22. Conductor; 23. Bracket; 24. Wiring screw;

[0054] 3. Ball assembly;

[0055] 4. arc extinguishing assembly; 41. magnetic member; 42. first arc striking member; 43. second arc striking member; 44. gap; 45. arc burning space; 46. heat insulating member; 461. first wall; 462. second wall; 463. third wall; 464. opening end;

[0056] 5. Shell; 51. First mounting structure; 511. Overlap groove; 52. Second mounting structure; 521. Limiting groove; 53. Exhaust hole;

[0057] 6. Button panel;

[0058] 7. Electric arc.

[0059] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0061] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0062] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0063] The embodiment of the present application provides an arc extinguishing switch, which can be a DC switch device applied to a DC circuit or an AC switch device applied to an AC circuit. Figure 1 The rocker switch shown may also be other types of switches, such as a rocker switch, a push button switch, etc.

[0064] The following takes the arc extinguishing switch as a rocker switch as an example to introduce and illustrate the solution of the embodiment of the present application in detail.

[0065] like Figure 2 As shown, an embodiment of the present application provides an arc extinguishing switch, including a swing assembly 1, a terminal assembly 2, a pin assembly 3 and an arc extinguishing assembly 4; the swing assembly 1 includes a moving contact 11, and a swing member 12 connected to the moving contact 11; the terminal assembly 2 includes a static contact 21; the pin assembly 3 can actuate the swing member 12, so that the moving contact 11 is close to or away from the static contact 21; the arc extinguishing assembly 4 is used to extinguish the arc 7 generated when the moving contact 11 and the static contact 21 are separated.

[0066] In the arc extinguishing switch, the terminal assembly 2 may include at least one of an incoming terminal assembly and an outgoing terminal assembly, and the incoming terminal assembly and the outgoing terminal assembly are controllably electrically connected via a moving contact 11 and a swinging member 12. For example, Figure 4 As shown, the arc extinguishing switch can be an AC switch, and accordingly, the terminal assembly 2 can include a live wire incoming terminal assembly, a live wire outgoing terminal assembly and a neutral wire terminal assembly, wherein the live wire outgoing terminal assembly and the neutral wire terminal assembly each have a static contact 21, the swing member 12 is always electrically connected to the live wire incoming terminal assembly, and the two ends of the swing member 12 are respectively provided with a moving contact 11, and the two moving contacts 11 correspond to the positions of the two static contacts 21. The arc extinguishing assembly 4 can be arranged around one of the moving contacts 11 and its corresponding static contact 21, and is used to extinguish the arc 7 between the moving contact 11 and the static contact 21; or, the arc extinguishing assembly 4 can also be arranged around two moving contacts 11 and their respective corresponding static contacts 21, and is used to extinguish the arc 7 between the two moving contacts 11 and their respective corresponding static contacts 21.

[0067] In the arc extinguishing switch provided in the embodiment of the present application, the positions of the moving contact 11 and the static contact 21 correspond, wherein the moving contact is arranged on the swinging member 12, and the static contact 21 is arranged on the terminal assembly 2. When the pin assembly 3 is subjected to an external force and actuates the swinging member 12 to move, the swinging member 12 will swing under the drive of the pin assembly 3, thereby actuating the moving contact 11 to gradually approach and contact the static contact 21 to conduct the circuit; or, actuating the moving contact 11 to separate from the static contact 21 and gradually move away from the static contact 21 to disconnect the circuit. Among them, the arc extinguishing switch also includes an arc extinguishing assembly 4, which is easy to generate an arc 7 at the moment when the moving contact 11 and the static contact 21 are separated, and the arc extinguishing assembly 4 can extinguish the arc 7, thereby avoiding the high-temperature arc 7 from burning the moving and static contacts 21, thereby improving the service life of the switch and ensuring the safety of electricity use.

[0068] like Figure 1As shown, the arc extinguishing switch provided in the embodiment of the present application may also include a shell 5 and a button panel 6, wherein the shell 5 has an inner cavity and an open end 464, and the swing assembly 1, the terminal assembly 2, the ball assembly 3 and the arc extinguishing assembly 4 are all accommodated in the inner cavity of the shell 5; the button panel 6 is covered on the open end 464 of the shell 5 and is connected to the ball assembly 3, and the button panel 6 is used to receive external actuation and transmit the actuation force to the ball assembly 3, so that the ball assembly 3 can actuate the swing assembly 1 to swing.

[0069] In some embodiments of the present application, the arc extinguishing switch may be as follows: Figure 2 The rocker switch shown in the figure. The swinging member 12 is a rocker, and the rocker includes an arc-shaped portion 121. The pin assembly 3 can slide on the arc-shaped portion 121 to move the rocker.

[0070] When the pin assembly 3 slides on the seesaw, it needs to overcome a certain sliding friction. In the related art, the part of the seesaw that slides with the pin assembly 3 is a flat structure. However, in the embodiment of the present application, by designing the part of the seesaw that slides with the pin assembly 3 as an arc-shaped portion 121, the sliding friction of the pin assembly 3 when sliding on the seesaw is reduced, so that the user feels lighter when turning the button, thereby improving the user's feel of turning the button.

[0071] Optionally, the arc portion 121 includes an arc surface, and the pin assembly 3 is located on a concave side of the arc surface and is slidably matched with the arc surface.

[0072] The seesaw provided in the embodiment of the present application may further include a connecting portion 122 , wherein the connecting portion 122 is connected to an end of the arc-shaped portion 121 , and the moving contact 11 is disposed on the connecting portion 122 .

[0073] like Fig.14 As shown, the seesaw includes an arc-shaped portion 121 and two connecting portions 122, the two connecting portions 122 are respectively connected to the two ends of the arc-shaped portion 121, and each connecting portion 122 is provided with a moving contact 11. Optionally, each connecting portion 122 is inclined in a direction away from the static contact 21 relative to the chord direction of the arc-shaped portion 121, wherein the chord direction of the arc-shaped portion 121 refers to the straight line direction where the chord of the two end points of the cross section passing through the arc surface of the arc-shaped portion 121 is located. Optionally, the swing fulcrum 123 of the seesaw is located in the middle position of the arc-shaped portion 121.

[0074] In order to make the technical solutions and advantages of this application clearer, Figure 3-15 , the arc extinguishing assembly 4 and its matching structure provided in the embodiment of the present application are further introduced and illustrated.

[0075] The arc extinguishing assembly 4 provided in the embodiment of the present application can extinguish the arc based on the principle of magnetic blowout. In some embodiments of the present application, such as Figure 3As shown, the arc extinguishing assembly 4 includes at least one magnetic member 41, and the at least one magnetic member 41 is used to provide a magnetic field to make the arc 7 move away from the moving contact 11 and the static contact 21, elongate, and extinguish.

[0076] At least one magnetic member 41 can provide a magnetic field, wherein when there are multiple magnetic members 41, the magnetic fields provided by the multiple magnetic members 41 are superimposed on each other, thereby forming a superimposed magnetic field with a larger coverage and greater intensity. Optionally, the magnetic member 41 can be a permanent magnet.

[0077] The moving contact 11 and the stationary contact 21 are both located in the magnetic field provided by at least one magnetic member 41. When an arc 7 is generated between the moving contact 11 and the stationary contact 21, the arc 7 will move under the action of the magnetic field, thereby gradually separating from the moving contact 11 and the stationary contact 21 to reduce the ablation of the moving contact 11 and the stationary contact 21. And as the arc 7 moves, the distance between the two ends of the arc 7 increases, which is manifested as the arc 7 being elongated, and the arc burning voltage of the arc 7 increases accordingly. When the arc burning voltage is greater than the power supply voltage (that is, the potential difference between the moving contact 11 and the stationary contact 21), the arc 7 will be extinguished.

[0078] Optionally, a magnetic member 41 can be arranged around each moving contact 11 and its corresponding static contact 21. The magnetic member 41 is arranged adjacent to the moving contact 11 or the static contact 21, for example, it can be arranged on the same side of the moving contact 11 and the static contact 21, or for example, it can be arranged on the side of the static contact 21 away from the moving contact 11, as long as the direction of the magnetic field is perpendicular to the direction of the current between the moving contact and the static contact.

[0079] Optionally, a pair of magnetic members 41 may be arranged around each moving contact 11 and its corresponding stationary contact 21 , and the pair of magnetic members 41 are respectively located on opposite sides of the moving contact 11 and the stationary contact 21 , and the moving contact 11 and the stationary contact 21 are located in the superimposed magnetic field of the pair of magnetic members 41 .

[0080] In some implementations of the embodiment of the present application, the polarities of two adjacent magnetic poles between a pair of magnetic members 41 are opposite, and the pair of magnetic members 41 is used to drive the arc 7 to move in a direction away from the swing fulcrum 123 of the swing member 12.

[0081] like Figure 4 As shown, a pair of magnetic members 41 are provided on both sides of each moving contact and its corresponding stationary contact, and the magnetic poles of the pair of magnetic members 41 are arranged in the order of N pole, S pole, N pole, S pole (or S pole, N pole, S pole, N pole). Figure 4Taking the structure shown as an example, for the moving contact 11 and the stationary contact 21 that are currently separated from each other, the direction of the current is from the moving contact 11 to the stationary contact 21, and the direction of the Lorentz force exerted on the arc 7 is from the moving contact 11 to the side away from the swing support 123, so the arc 7 will move in the direction away from the swing support 123.

[0082] In some embodiments of the present application, Figure 5 As shown, the arc extinguishing assembly 4 also includes a first arc-striking member 42 and a second arc-striking member 43. The first arc-striking member 42 and the second arc-striking member 43 are both located in the moving direction of the arc 7. The first arc-striking member 42 is electrically connected to the static contact 21, and the second arc-striking member 43 is electrically connected to the moving contact 11.

[0083] The first arc-starting member 42 and the second arc-starting member 43 are both located in the moving direction of the arc 7, which means that the orientations of the first arc-starting member 42 and the second arc-starting member 43 relative to the stationary contact 21 and the moving contact 11 are respectively consistent with the direction of the Lorentz force on the arc 7 in the magnetic field, so as to ensure that the arc 7 generated between the stationary contact 21 and the moving contact 11 will move toward the first arc-starting member 42 and the second arc-starting member 43 and be located between the first arc-starting member 42 and the second arc-starting member 43. Therefore, the embodiment of the present application reduces the residence time of the arc 7 on the stationary contact 21 and the moving contact 11 by providing the first arc-starting member 42 and the second arc-starting member 43 to carry the arc 7, thereby reducing the ablation of the stationary contact 21 and the moving contact 11 by the arc 7.

[0084] Optionally, the second arc-striking member 43 is located on a side of the moving contact 11 on the swing member 12 away from the swing fulcrum 123 , and the position of the first arc-striking member 42 corresponds to the position of the second arc-striking member 43 .

[0085] In order to ensure that the arc 7 can smoothly move between the first arc-striking member 42 and the second arc-striking member 43, it is necessary to electrically connect the first arc-striking member 42 to the static contact 21, and the voltage difference between the first arc-striking member 42 and the static contact 21 is not greater than the set threshold; the second arc-striking member 43 is electrically connected to the moving contact 11, and the voltage difference between the second arc-striking member 43 and the moving contact 11 is not greater than the set threshold. The set threshold is set by the technician according to actual needs. Generally speaking, the smaller the set threshold, the better the arc-striking effect. Optionally, the set threshold can be 0, that is, there is no voltage difference between the first arc-striking member 42 and the static contact 21, and there is no voltage difference between the second arc-striking member 43 and the moving contact 11.

[0086] Optionally, the terminal assembly 2 further includes a conductor 22 , and the stationary contact 21 and the first arc-starting member 42 are both connected to the conductor 22 , wherein the first arc-starting member 42 protrudes from the conductor 22 toward the moving contact 11 .

[0087] like Figure 7As shown, the static contact 21 is connected to the conductor 22, and the surface of the static contact 21 for generating the arc 7 (i.e., the surface for contacting and cooperating with the moving contact 11) protrudes relative to the connection surface with the conductor 22. By designing the first arc-starting member 42 as a structure protruding from the conductor 22 toward the moving contact 11, the first arc-starting member 42 can be made close to or contact the surface of the static contact 21 for generating the arc 7 to ensure a smooth transition of the arc 7 from the static contact 21 to the first arc-starting member 42. Among them, "the first arc-starting member 42 protrudes from the conductor 22 toward the moving contact 11" can also be understood as the first arc-starting member 42 protruding from the connection surface between the conductor 22 and the static contact 21 toward the moving contact 11.

[0088] Optionally, the second arc-striking member 43 may be connected to the swing member 12 , and the second arc-striking member 43 protrudes toward the static contact 21 .

[0089] Continue to see Figure 7 , the moving contact 11 is connected to the swinging member 12, and the surface of the moving contact 11 for generating the arc 7 (i.e., the surface for contacting and cooperating with the static contact 21) protrudes relative to the connection surface between the moving contact 11 and the swinging member 12. By designing the second arc-starting member 43 as a structure protruding from the swinging member 12 toward the moving contact 11, the second arc-starting member 43 can be made close to or contact the surface of the moving contact 11 for generating the arc 7, so as to ensure that the arc 7 automatically transitions from the contact 11 to the second arc-starting member 43 smoothly. Among them, "the second arc-starting member 43 protrudes from the swinging member 12 toward the static contact 21" can also be understood as the second arc-starting member 43 protruding from the connection surface between the swinging member 12 and the moving contact 11 toward the static contact 21.

[0090] It should be noted that the first arc-starting member 42 is arranged close to the static contact 21, including both the case where the first arc-starting member 42 and the static contact 21 are in direct contact, and the case where a certain interval exists between the first arc-starting member 42 and the static contact 21; the second arc-starting member 43 is arranged close to the moving contact 11, including both the case where the second arc-starting member 43 and the moving contact 11 are in direct contact, and the case where a certain interval exists between the second arc-starting member 43 and the moving contact 11. Among them, for the above-mentioned case where there is an interval, the embodiment of the present application does not limit the width of the interval, as long as it can ensure that the arc 7 generated between the moving contact 11 and the static contact 21 can break through the air in the interval, thereby moving through the interval to between the first arc-starting member 42 and the second arc-starting member 43.

[0091] In some embodiments of the present application, Figure 6 As shown, the first arc-striking member 42 contacts the stationary contact 21 and extends in a direction away from the stationary contact 21; and / or the second arc-striking member 43 contacts the moving contact 11 and extends in a direction away from the moving contact 11. The extending directions of the first arc-striking member 42 and the second arc-striking member 43 are both the same as the moving direction of the arc 7.

[0092] For example, the first arc-guiding member 42 and the second arc-guiding member 43 may be designed as strip-shaped members, in which case the extending direction of the strip-shaped members refers to the length direction. Figure 6 As shown, the second arc-starting member 43 can be arranged on the swinging member 12, directly contacting the moving contact 11, and automatically extending the contact 11 in the direction away from the swinging fulcrum 123 of the swinging member 12; the first arc-starting member 42 is arranged on the terminal assembly 2, and directly contacting the static contact 21, and the extension direction of the first arc-starting member 42 is the same as the extension direction of the second arc-starting member 43, wherein when the static contact 21 is in contact with the moving contact 11, the positions of the first arc-starting member 42 and the second arc-starting member 43 correspond.

[0093] It should be noted that, based on the structural shape of the first arc-starting member 42 and the second arc-starting member 43, when the magnetic field is configured using the magnetic member 41, the direction of the Lorentz force exerted on the arc 7 in the magnetic field must be the same as the extension direction of the first arc-starting member 42 and the second arc-starting member 43, thereby ensuring that the arc 7 can move along the extension direction of the first arc-starting member 42 and the second arc-starting member 43 to move away from the static contact 21 and the moving contact 11.

[0094] In some other embodiments of the present application, the first arc-striking member 42 and the static contact 21 may be arranged at intervals; and / or, the second arc-striking member 43 and the moving contact 11 may be arranged at intervals.

[0095] like Figure 7 As shown, there is a gap between the first arc-striking member 42 and the static contact 21, and there is also a gap between the second arc-striking member 43 and the moving contact 11. The arc 7 generated between the static contact 21 and the moving contact 11 can "cross" the gap and move between the first arc-striking member 42 and the second arc-striking member 43. The embodiment of the present application does not limit the size of the gap, as long as it can ensure that the arc 7 is sufficient to break through the air in the gap and "cross" the gap. Optionally, the width of the gap can range from 0.5cm to 2cm. For example, the width of the gap can be 0.8cm, 1cm, 1.2cm, 1.5cm or 1.8cm. Among them, the width direction of the gap is parallel to the moving direction of the arc 7.

[0096] See also Figure 7 In some embodiments, the static contact 21 may be disposed at the free end of the conductor 22 , and the first arc-starting member 42 is formed by cutting a portion of the conductor 22 and bending the portion toward a side of the conductor 22 close to the moving contact 11 .

[0097] The terminal assembly 2 may include a bracket 23, a wiring screw 24 and a conductor 22, wherein the bracket 23 has a wiring cavity, a wiring opening and a plug-in slot, the wiring opening and the plug-in slot are provided on different side walls of the bracket 23 and are both connected to the wiring cavity; the wiring screw 24 is threadedly connected to the bracket 23, and the tail of the wiring screw 24 extends into the wiring cavity; the conductor 22 is plugged into the bracket through the plug-in slot, and a part of the conductor 22 is located in the axial direction of the wiring screw 24. When the terminal assembly 2 is wired, the external wire can extend from the wiring opening into the wiring cavity and be fastened by the wiring screw 24, so that the external wire is clamped between the tail of the wiring screw 24 and the conductor 22.

[0098] In this embodiment, the free end of the conductor 22 refers to the end away from the bracket 23, and the static contact 21 is installed on the free end of the conductor 22 for matching with the moving contact 11. Optionally, the conductor 22 is a conductive sheet.

[0099] The first arc-starting member 42 can be obtained by cutting a portion of the conductor 22 and bending the cut portion, wherein the cut portion is not completely separated from other portions of the conductor 22, but remains integrally connected with the other portions. Figure 7 As shown, after the cut portion is bent, its free end is close to but not in contact with the surface of the stationary contact 21 for generating the arc 7.

[0100] Continue to see Figure 7 In some embodiments, the second arc-starting member 43 is formed by bending the end of the swing member 12 close to the moving contact 11 toward a side close to the static contact 21 .

[0101] When the swing member 12 is a seesaw, Figure 7 As shown, the moving contact 11 is arranged on the connecting portion 122 of the seesaw, and the second arc-starting member 43 can be obtained by bending one end of the connecting portion 122 away from the arc-shaped portion 121, wherein the moving contact 11 is located between the second arc-starting member 43 and the arc-shaped portion 121. Figure 7 As shown, one end of the connecting portion 122 away from the arc-shaped portion 121 is bent so as to be close to but not contact the surface of the moving contact 11 for generating the arc 7 .

[0102] It should be noted that the protruding height of the first arc-starting member 42 relative to the conductor 22 and the protruding height of the second arc-starting member 43 relative to the connecting portion 122 cannot be too high, otherwise the contact between the moving contact 11 and the stationary contact 21 will be affected. Figure 8 As shown, when the static contact 21 and the movable contact 11 are in contact, there is a gap 44 between the first arc-striking member 42 and the second arc-striking member 43 .

[0103] In some embodiments of the present application, Fig.12As shown, the arc extinguishing assembly 4 further includes a heat insulating member 46, which is located in the moving direction of the arc 7 and is used to isolate the arc 7 from the injection molded parts in the arc extinguishing switch.

[0104] Generally speaking, the shell 5 of the arc extinguishing switch is an injection molded part, and the structure inside the shell 5 for mounting the terminal assembly 2 and the swing assembly 1 is also an injection molded part. The melting point of the injection molded part is about one hundred to several hundred degrees Celsius, but the temperature of the arc 7 can reach several thousand degrees Celsius, so the high-temperature arc 7 easily causes ablation and damage to the injection molded parts around the moving contact 11 and the static contact 21. By arranging a heat insulating member 46 in the moving direction of the arc 7, the moving arc 7 can be isolated from the surrounding injection molded parts, thereby avoiding damage to the injection molded parts.

[0105] In the embodiment of the present application, the heat insulating member 46 needs to have low thermal conductivity and good high temperature stability, so that it can have a good thermal insulation effect on the one hand, and on the other hand, it is a high temperature resistant structure and is not easily ablated by the arc 7. Optionally, the heat insulating member 46 can be a ceramic sheet.

[0106] In addition, the heat insulating member 46 needs to be made of an electrically insulating material, that is, the heat insulating member 46 is non-conductive, thereby preventing the arc 7 from being difficult to extinguish and also preventing leakage accidents.

[0107] Alternatively, if Fig.13 As shown, the heat insulating member 46 is a cavity structure with a U-shaped cross section, and the arc 7 is suitable for entering the heat insulating member 46 from the U-shaped opening end 464. Exemplarily, the heat insulating member 46 includes a first wall 461, a second wall 462 and a third wall 463 connected in sequence, wherein the first wall 461 and the third wall 463 are located on the same side of the second wall 462 and are arranged opposite to each other, and the first wall 461, the second wall 462 and the third wall 463 form a semi-open cavity structure, and an opening end 464 is formed between the first wall 461 and the third wall 463, and the opening end 464 is opposite to the second wall 462. The opening end 464 of the heat insulating member 46 is arranged toward the moving contact 11 and the static contact 21, so that the arc 7 generated between the moving contact 11 and the static contact 21 can move toward the heat insulating member 46 under the action of the magnetic field, and enter the cavity of the heat insulating member 46 from the opening end 464. The first wall 461 , the second wall 462 and the third wall 463 of the heat insulating member 46 are used to isolate the arc 7 from the injection molded parts around the heat insulating member 46 .

[0108] Alternatively, if Fig.13 As shown, the wall thickness of the first wall 461 of the thermal insulation member 46 that is farther from the second wall 462 is smaller, and / or the wall thickness of the third wall 463 that is farther from the second wall 462 is smaller, so as to facilitate the arc 7 to enter the cavity of the thermal insulation member 46.

[0109] Optionally, the first wall 461 is perpendicular to the second wall 462 , and the third wall 463 is perpendicular to the second wall 462 .

[0110] Optionally, the heat insulating member 46 is mounted on the housing 5 and is located between the bracket of the terminal assembly 2 and the swing member 12 .

[0111] In some other implementations of the embodiments of the present application, Fig. 9 As shown, the polarities of two adjacent magnetic poles between a pair of magnetic members 41 may also be the same. Arcing spaces 45 are provided on both sides of each magnetic member 41 , and the arcing spaces 45 are used to allow the arc 7 to enter and move in the arcing spaces 45 .

[0112] It is easy to understand that in the embodiments of the present application, Fig. 9 and Fig.11 As shown, the two sides of the magnetic member 41 refer to the two opposite sides in the first direction X, the first direction X is perpendicular to the second direction Y, and perpendicular to the third direction Z, wherein the second direction Y is the arrangement direction of two magnetic members 41 in a pair of magnetic members 41, and the third direction Z is the direction from the button panel 6 of the arc extinguishing switch to the bottom of the shell 5, and the bottom of the shell 5 is away from the button panel 6.

[0113] See also Fig. 9 When the magnetism of two adjacent magnetic poles between the two magnetic members 41 disposed on both sides of the moving contact is the same, the Lorentz force on the arc 7 is directed to the side of the magnetic member 41, rather than the side of the moving contact away from the swing fulcrum 123 of the swing member 12. In this case, the side of the magnetic member 41 needs to be configured with an arc burning space 45 of sufficient size to allow the arc 7 to move until it is extinguished.

[0114] In some embodiments of the present application, Fig.10 As shown, the housing 5 has a first mounting structure 51 for mounting the magnetic member 41, and a second mounting structure 52 for mounting the terminal assembly 2, and the arc burning space 45 is formed between the first mounting structure 51 and the second mounting structure 52. That is, the moving arc 7 can pass between the first mounting structure 51 and the second mounting structure 52.

[0115] See also Fig.10 and Fig.11, corresponding to the magnetic member being a bar-shaped permanent magnet, the first mounting structure 51 may be a sleeve-type structure having only a top opening, and the magnetic member 41 is used to be inserted into the first mounting structure 51 from the top opening for installation. The first mounting structure 51 is closed along the annular direction to be completely isolated from the moving contact 11 and the static contact 21, wherein the top refers to the portion close to the button panel 6, and the annular direction is perpendicular to the opening direction of the top opening of the first mounting structure 51. Wherein, when the number of the first mounting structures 51 is two, the two first mounting structures are located on opposite sides of the swing member 12 in the second direction, and are arranged close to the moving contact 11.

[0116] Optionally, the first mounting structure 51 is made of heat-insulating and insulating materials to prevent the high temperature when the arc 7 is generated from affecting the magnetism of the magnetic component 41 and to avoid leakage or short circuit.

[0117] In some embodiments, the second mounting structure 52 is also a sleeve-type structure, similar to the first mounting structure 51, and the second mounting structure 52 also has only a top opening, and the terminal assembly 2 is used to be inserted into the second mounting structure 52 from the top opening for installation. The second mounting structure 52 is closed along the annular direction to be completely isolated from the moving contact 11 and the static contact 21, wherein the top direction and annular direction of the second mounting structure 52 are the same as those of the first mounting structure 51, and will not be repeated here. Among them, when the number of the second mounting structures 52 is two, the two second mounting structures 52 are located on opposite sides of the swing member 12 in the first direction, and are respectively arranged close to the two moving contacts 11 on the swing member 12.

[0118] Optionally, the second mounting structure 52 is made of heat-insulating and insulating materials to avoid high-temperature ablation when the arc 7 is generated, and to avoid leakage or short circuit.

[0119] like Fig.11 As shown, in some embodiments, the free end of the conductor 22 of the terminal assembly 2 extends from the top opening of the second mounting structure 52 and extends toward the direction close to the swing member 12 to meet the matching requirements of the moving contact 11 and the static contact 21 installed at the free end.

[0120] In this case, if Fig.15 As shown, a limiting groove 521 may be provided at the edge of the top opening of the second mounting structure 52 , and the free end of the conductor 22 extends from the top opening of the second mounting structure 52 and is inserted into the limiting groove 521 to prevent the conductor 22 from shaking.

[0121] In this embodiment, the first mounting structure 51 can also overlap and cooperate with the free end of the conductor 22 to support the free end of the conductor 22. Fig.10 , 11and 15 , the two first mounting structures 51 are provided with overlapping grooves 511 at the edges of the top openings, and the free ends of the conductors 22 are overlapped in the two overlapping grooves 511 at opposite sides in the second direction.

[0122] It should be noted that when the free end of the conductor 22 is overlapped in the two overlap grooves 511, the static contact 21 is located in the area between the two overlap grooves 511, and there is a gap between the magnetic member 41 contained in the first mounting structure 51 and the free end of the conductor 22. Exemplarily, the magnetic member 41 and the overlap groove 511 are located at different heights in the third direction, and when the free end of the conductor 22 is located in the overlap groove 511, the magnetic member 41 is lower than the free end of the conductor 22, so that the two do not contact.

[0123] Optionally, the arc burning space 45 may be surrounded by a heat insulating member 46, and the heat insulating member 46 is used to isolate the arc 7 from the first mounting structure 51 and the second mounting structure 52, so as to prevent the arc 7 from burning the first mounting structure 51 and the second mounting structure 52. At the same time, since the magnetic member 41 installed in the first mounting structure 51 is also isolated from the arc 7 by the heat insulating member 46, the influence of high temperature on the magnetism of the magnetic member 41 can also be avoided.

[0124] In some embodiments of the present application, Fig.11 As shown, an exhaust hole 53 is formed on the housing 5 , and the exhaust hole 53 is located in the moving direction of the arc 7 .

[0125] The exhaust hole 53 is used to increase the circulation of air around the arc 7. On the one hand, it can speed up the cooling efficiency of the arc 7. On the other hand, with the flow of air, the diffusion degree of charged particles in the air near the arc 7 increases, so that the charged ions in the arc 7 are reduced, the ionization degree is reduced, and the arc 7 is easier to extinguish. The exhaust hole 53 is usually set in the direction of the Lorentz force on the arc 7 to speed up the speed of the arc 7 from the moving contact 11 and the static contact 21, and reduce the ablation of the moving contact 11 and the static contact 21 by the arc 7.

[0126] Optionally, the exhaust hole 53 may penetrate through the shell wall of the shell 5 , so as to discharge the gas inside the shell 5 to the outside of the shell 5 .

[0127] In summary, the arc extinguishing switch provided in the embodiment of the present application can drive the arc 7 generated at the moment of separation of the moving contact 11 and the static contact 21 to move, stretch and extinguish by setting at least one magnetic member 41 around the moving contact 11 and its corresponding static contact 21; a first arc-starting member 42 and a second arc-starting member 43 can be provided in the moving direction of the arc 7, and the first arc-starting member 42 and the second arc-starting member 43 can replace the moving contact 11 and the static contact 21 to carry the arc 7, thereby reducing the residence time of the arc 7 on the static contact 21 and the moving contact 11, thereby reducing the ablation of the static contact 21 and the moving contact 11 by the arc 7; and an arc burning space 45 and a heat insulating member 46 can be provided in the moving direction of the arc 7, thereby preventing the high-temperature arc 7 from ablating the surrounding injection molded parts, thereby improving the service life of the product. Therefore, in the arc extinguishing switch provided in the embodiment of the present application, the arc extinguishing assembly 4 can reduce various adverse effects caused by the ablation of the arc 7, improve the service life of the switch, and ensure the safety of electricity use.

[0128] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the present application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only.

[0129] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. An arc extinguishing switch, characterized in that: The arc extinguishing switch comprises a swing assembly (1), a terminal assembly (2), a pin assembly (3) and an arc extinguishing assembly (4); The swing assembly (1) comprises a moving contact (11) and a swing member (12) connected to the moving contact (11); The terminal assembly (2) comprises a stationary contact (21); The pin assembly (3) can actuate the swinging member (12), thereby causing the moving contact (11) to move closer to or farther from the stationary contact (21); The arc extinguishing assembly (4) is used to extinguish the arc (7) generated when the moving contact (11) and the static contact (21) are separated.

2. The arc extinguishing switch according to claim 1, characterized in that: The arc extinguishing assembly (4) comprises at least one magnetic component (41), and the at least one magnetic component (41) is used to provide a magnetic field so as to cause the electric arc (7) to move in a direction away from the moving contact (11) and the stationary contact (21), to be elongated and extinguished.

3. The arc extinguishing switch according to claim 2, characterized in that: The arc extinguishing assembly (4) comprises a pair of magnetic members (41), the pair of magnetic members (41) being respectively located on opposite sides of the moving contact (11) and the stationary contact (21), and the polarities of two adjacent magnetic poles between the pair of magnetic members (41) are opposite; The pair of magnetic members (41) are used to drive the electric arc (7) to move in a direction away from the swing support point (123) of the swing member (12).

4. The arc extinguishing switch according to claim 3, characterized in that: The arc extinguishing assembly (4) further comprises a first arc striking member (42) and a second arc striking member (43), wherein the first arc striking member (42) and the second arc striking member (43) are both located in the moving direction of the electric arc (7); The first arc-striking member (42) is electrically connected to the stationary contact (21), and the second arc-striking member (43) is electrically connected to the moving contact (11).

5. The arc extinguishing switch according to claim 4, characterized in that: The terminal assembly (2) further comprises a conductor (22), the stationary contact (21) and the first arc-starting member (42) are both connected to the conductor (22), wherein the first arc-starting member (42) protrudes from the conductor (22) toward the movable contact (11); and / or, The second arc-starting member (43) is connected to the swing member (12) and protrudes from the swing member (12) toward the static contact (21).

6. The arc extinguishing switch according to claim 5, characterized in that: The static contact (21) is arranged at the free end of the conductor (22), and the first arc-starting member (42) is formed by cutting a portion of the conductor (22) and bending the portion toward a side of the conductor (22) close to the moving contact (11); The second arc-starting member (43) is formed by bending the end of the swing member (12) close to the moving contact (11) toward a side close to the stationary contact (21).

7. The arc extinguishing switch according to any one of claims 4 to 6, characterized in that: When the static contact (21) and the moving contact (11) are in contact, a gap (44) is provided between the first arc-striking member (42) and the second arc-striking member (43).

8. The arc extinguishing switch according to claim 2, characterized in that: The arc extinguishing assembly (4) comprises a pair of magnetic members (41), the pair of magnetic members (41) being located on opposite sides of the moving contact (11) and the stationary contact (21), respectively, and the polarities of two adjacent magnetic poles between the pair of magnetic members (41) being the same; Arcing spaces (45) are respectively arranged on both sides of each magnetic member (41), and the arcing spaces (45) are used to allow the electric arc (7) to enter and move in the arcing spaces (45).

9. The arc extinguishing switch according to claim 8, characterized in that: The arc extinguishing switch comprises a housing (5), wherein the housing (5) has a first mounting structure (51) for mounting the magnetic member (41), and a second mounting structure (52) for mounting the terminal assembly (2); The arcing space (45) is formed between the first mounting structure (51) and the second mounting structure (52).

10. The arc extinguishing switch according to claim 9, characterized in that: An exhaust hole (53) is formed on the shell (5), and the exhaust hole (53) is located in the moving direction of the electric arc (7).

11. The arc extinguishing switch according to claim 3, characterized in that: The arc extinguishing assembly (4) further comprises a heat insulating member (46), wherein the heat insulating member (46) is located in the moving direction of the electric arc (7) and is used to isolate the electric arc (7) from the injection molded part in the arc extinguishing switch.

12. The arc extinguishing switch according to claim 11, characterized in that: The heat insulating member (46) is a cavity structure with a U-shaped cross section, and the electric arc is suitable for entering the heat insulating member (46) from the U-shaped opening end (464).

13. The arc extinguishing switch according to claim 12, characterized in that: The heat insulating member (46) comprises a first wall (461), a second wall (462) and a third wall (463) which are connected in sequence, wherein the first wall (461) and the third wall (463) are located on the same side of the second wall (462) and are arranged opposite to each other; The thickness of a portion of the first wall (461) that is farther from the second wall (462) is smaller, and / or the thickness of a portion of the third wall (463) that is farther from the second wall (462) is smaller.

14. The arc extinguishing switch according to claim 1, characterized in that: The swinging member (12) is a seesaw; The seesaw has an arc-shaped portion (121), and the pin assembly (3) can slide on the arc-shaped portion (121) to move the seesaw.

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