Switching mechanism and contactor

Abstract

The utility model provides a switching mechanism and a contactor, and relates to the technical field of low-voltage electric appliances. The switching mechanism comprises a shell, a movable iron core and a static iron core, the side, away from the static iron core, of the movable iron core is connected with a driving part, and one end of the driving part is movably connected with a first contact assembly of the contactor; a travel switch of the contactor is arranged on the peripheral side of the driving part, and the driving part abuts against the travel switch so that a control loop controlled by the travel switch can be switched between opening and closing, and a main loop controlled by the first contact assembly can be closed; an elastic piece is arranged on the inner wall of the shell; the movable iron core is driven to move in the direction of the static iron core and drive the driving part to rotate, the side, facing the travel switch, of the driving part can abut against the elastic piece, the movable iron core and the static iron core are attracted, and the driving part overcomes the elastic force of the elastic piece to be disengaged from the elastic piece and makes contact with the travel switch. The switching mechanism enables the pressing process of the pressing plate and the pull-in process of the movable iron core and the static iron core to realize differential delay, and improves the reliability of cutting off an electrical loop.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a switching mechanism and a contactor. Background Art

[0002] A contactor is a device that can quickly cut off the AC and DC main circuits and can frequently connect and disconnect high current control circuits. It is widely used in power, coordination and electricity consumption occasions. The switching mechanism set inside it can quickly cut off the AC and DC main circuits.

[0003] The existing mechanical double-coil switching mechanism needs to ensure that the travel switch overtravels when driving the bracket of the travel switch to move downward to disconnect the contacts. When the switching mechanism presses down the bracket of the travel switch to disconnect the contacts, the moving and static iron cores may not be able to close completely, and the remaining stroke needs to rely on the inertia impulse and suction force when the moving and static iron cores are attracted. However, when the suction force is too small or the inertia impulse is unstable, it is easy to cause the moving and static iron cores to fail to be stably attracted, thereby reducing the reliability of the contactor to quickly cut off the electrical circuit. Utility Model Content

[0004] The present application provides a switching mechanism and a contactor, which can achieve a differential delay between the process of the pressure plate pressing down the travel switch and the process of the moving iron core and the stationary iron core being attracted through the resistance of the rocker arm, the pressure plate and the elastic member, thereby ensuring that the pressure plate presses down the travel switch after the moving iron core and the stationary iron core are attracted, thereby improving the reliability of the switching mechanism in quickly cutting off the electrical circuit.

[0005] The embodiment of the present application is implemented as follows:

[0006] On the one hand, an embodiment of the present application provides a switching mechanism, including a shell and a moving iron core and a stationary iron core relatively arranged in the shell, a driving part is connected to the side of the moving iron core facing away from the stationary iron core, one end of the driving part is movably connected to the first contact assembly of the contactor, and the first contact assembly is used to realize the closing or opening of the main circuit; a travel switch of the contactor is arranged on the peripheral side of the driving part, which is used to realize the closing or opening of the control circuit, and the driving part presses the travel switch to switch the control circuit and close the main circuit; an elastic part is also arranged on the side of the travel switch facing the driving part, and the elastic part is arranged on the inner wall of the shell; the moving iron core is driven to move in the direction of the stationary iron core and drive the driving part to rotate, and the side of the driving part facing the travel switch can abut against the elastic part, the moving iron core and the stationary iron core are attracted, and the driving part overcomes the elastic force of the elastic part, separates from the elastic part and moves to contact with the travel switch.

[0007] Optionally, the driving part includes a rocker arm and a pressure plate hinged on the rocker arm, one end of the rocker arm is movably connected to the first contact assembly of the contactor, and the moving iron core is arranged on the side of the rocker arm close to the static iron core; driving the moving iron core to rotate axially along the static iron core can drive the rocker arm to rotate axially along the static iron core, so that the pressure plate contacts the elastic part and the travel switch in turn.

[0008] Optionally, the rocker arm includes a shell, a return spring is arranged inside the shell, one end of the pressure plate is fixedly connected to the return spring, and the other end extends to the outer wall of the shell and can contact the elastic member.

[0009] Optionally, the travel switch includes a bracket protruding from the housing and extending to one side of the rocker arm, and the pressure plate can overcome the elastic force of the elastic member and press down the bracket to open the control circuit.

[0010] Optionally, the pressure plate includes a second body, a first connecting plate and a second connecting plate, the second connecting plate is vertically arranged at the end of the first connecting plate, the second body is vertically arranged at an end of the second connecting plate away from the first connecting plate, and the first connecting plate is fixedly connected to the reset spring; an opening is provided on the side of the rocker arm housing facing the elastic member, and the second body extends out from the opening so as to be able to contact the elastic member.

[0011] Optionally, the shell includes a first limiting portion and a second limiting portion which are spaced apart from each other. The first limiting portion and the second limiting portion are arranged opposite to each other along the moving direction of the pressing plate so as to respectively clamp opposite ends of the elastic member.

[0012] Optionally, the elastic member includes a first body, a first clamping portion and a second clamping portion, the first clamping portion and the second clamping portion are respectively vertically connected to opposite sides of the first body, the first clamping portion can be clamped in the first limiting portion, and the second clamping portion can be clamped in the second limiting portion, so that the elastic member has an arc-shaped structure.

[0013] Optionally, the travel switch includes a second contact assembly, and the bracket of the travel switch is connected to the second moving contact of the second contact assembly. When the pressure plate presses down the bracket, the static contact of the second contact assembly is disconnected from the second moving contact, so that the control circuit controlled by the travel switch can be switched between opening and closing.

[0014] Optionally, one end of the driving part is movably connected to the first moving contact of the first contact assembly of the contactor. When the moving iron core rotates axially along the static iron core and moves toward the static iron core, it can drive the driving part to rotate. The driving part can drive the first moving contact to contact the static contact of the first contact assembly to close the main circuit.

[0015] On the other hand, an embodiment of the present application provides a contactor, including a first contact assembly, a travel switch and the above-mentioned switching mechanism, wherein the driving portion of the switching mechanism can press against the travel switch to close the main circuit controlled by the first contact assembly and switch the control circuit controlled by the travel switch between opening and closing.

[0016] The beneficial effects of the embodiments of the present application include at least one of the following:

[0017] The switching mechanism provided in the present application includes a shell and a moving iron core and a stationary iron core relatively arranged in the shell, a driving part is connected to the side of the moving iron core facing away from the stationary iron core, one end of the driving part is movably connected to the first contact assembly of the contactor, and the first contact assembly is used to realize the closing or opening of the main circuit; a travel switch of the contactor is arranged on the peripheral side of the driving part, which is used to realize the closing or opening of the control circuit, and the driving part presses the travel switch to switch the control circuit and close the main circuit; an elastic part is also arranged on the side of the travel switch facing the driving part, and the elastic part is arranged on the inner wall of the shell; the moving iron core is driven to move in the direction of the stationary iron core and drive the driving part to rotate, and the side of the driving part facing the travel switch can abut against the elastic part, the moving iron core and the stationary iron core are attracted, and the driving part overcomes the elastic force of the elastic part, separates from the elastic part and moves to contact with the travel switch. The switching mechanism obtained by the above design can achieve differential delay between the process of the pressure plate pressing down the travel switch and the process of the moving iron core and the static iron core being attracted through the resistance of the rocker arm, the pressure plate and the elastic part, thereby ensuring that the pressure plate presses down the travel switch after the moving iron core and the static iron core are attracted, thereby improving the reliability of the switching mechanism in quickly cutting off the electrical circuit.

[0018] The contactor provided by the present application includes a first contact assembly, a travel switch and the above-mentioned switching mechanism, wherein the driving part of the switching mechanism can press the travel switch to close the main circuit controlled by the first contact assembly and switch the control circuit controlled by the travel switch. The contactor obtained by the above design can ensure that the pressure plate presses down the travel switch after the moving iron core and the static iron core are attracted, thereby improving the reliability of the switching mechanism to quickly cut off the electrical circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 One of the cross-sectional structural schematic diagrams of the contactor provided in the embodiment of the present application;

[0021] Figure 2The second schematic diagram of the cross-sectional structure of the contactor provided in the embodiment of the present application;

[0022] Figure 3 One of the structural schematic diagrams of the switching mechanism provided in the embodiment of the present application;

[0023] Figure 4 The second structural diagram of the switching mechanism provided in the embodiment of the present application;

[0024] Figure 5 This is an enlarged view of the details at A;

[0025] Figure 6 A schematic diagram of the structure of the elastic member provided in the embodiment of the present application;

[0026] Figure 7 A schematic diagram of the structure of a travel switch of a contactor provided in an embodiment of the present application;

[0027] Figure 8 A schematic cross-sectional structure diagram of a travel switch of a contactor provided in an embodiment of the present application;

[0028] Fig. 9 A schematic diagram of the structure of a contactor provided in an embodiment of the present application.

[0029] Icon: 100-switching mechanism; 110-housing; 111-first limiting part; 112-second limiting part; 120-moving iron core; 130-static iron core; 140-driving part; 141-housing; 142-rocker arm; 143-pressure plate; 1431-second body; 1432-first connecting plate; 1433-second connecting plate; 144-reset spring; 150-elastic member; 151-first body; 152-first clamping part; 153-second clamping part; 200-contactor; 210-travel switch; 211-bracket; 212-second contact assembly; 220-first contact assembly. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings 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. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] In the description of the present application, it should be understood that the terms indicating 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 invention 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 should not be understood as a limitation on the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a signal connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0034] In one aspect of an embodiment of the present application, a switching mechanism 100 is provided, comprising a housing 110 and a moving iron core 120 and a stationary iron core 130 arranged relatively in the housing 110, a driving part 140 is connected to the side of the moving iron core 120 away from the stationary iron core 130, one end of the driving part 140 is movably connected to a first contact assembly 220 of a contactor 200, and the first contact assembly 220 is used to realize the closing or opening of the main circuit; a travel switch 210 of the contactor 200 is arranged on the peripheral side of the driving part 140, which is used to realize the closing or opening of the control circuit, and the driving part 140 presses against the moving iron core 120 to close the moving iron core 130. The travel switch 210 is used to switch the control circuit between opening and closing and close the main circuit; an elastic member 150 is also provided on the side of the travel switch 210 facing the driving part 140, and the elastic member 150 is provided on the inner wall of the shell 110; the moving iron core 120 is driven to move along the direction of the static iron core 130, and the driving part 140 is driven to rotate, and the side of the driving part 140 facing the travel switch 210 can abut against the elastic member 150, the moving iron core 120 and the static iron core 130 are attracted, and the driving part 140 overcomes the elastic force of the elastic member 150 and separates from the elastic member 150 and moves to contact with the travel switch 210.

[0035] For details, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5The present application provides a switching mechanism 100, which includes a housing 110 and a moving iron core 120 and a static iron core 130 disposed in the housing 110, wherein the moving iron core 120 and the static iron core 130 are disposed opposite to each other and have a certain gap; further includes a driving part 140, wherein the driving part 140 is disposed on a side of the moving iron core 120 away from the static iron core 130 and connected to the moving iron core 120; one end of the driving part 140 is movably connected to a first contact assembly 220 of a contactor 200; a travel switch 210 of the contactor 200 is disposed on the peripheral side of the driving part 140. The first contact assembly 220 is used to realize the closing or opening of the main circuit, and the travel switch 210 is used to realize the closing or opening of the control circuit; an elastic member 150 is also disposed on the side of the driving part 140 close to the travel switch 210, and the elastic member 150 is fixed to the inner wall of the housing 110.

[0036] The static iron core 130 and the moving iron core 120 are also connected to control coils respectively. When the control coils are powered on, the moving iron core 120 and the static iron core 130 are acted upon by electromagnetic force, so that the moving iron core 120 rotates axially around the static iron core 130 and moves toward the static iron core 130. At this time, the movement of the moving iron core 120 can drive the driving part 140 to move axially around the static iron core 130 and move toward the static iron core 130. One side of the driving part 140 can touch the elastic member 150, and the elastic member 150 is moved to the static iron core 130. 50 makes one side of the driving part 140 abut against the elastic member 150; the moving iron core 120 continues to drive the driving part 140 to move axially around the static iron core 130 and move toward the static iron core 130 until one side of the driving part 140 overcomes the elastic force of the elastic member 150 and moves toward the limit switch 210 until it contacts and presses down the limit switch 210, so that the control circuit controlled by the limit switch 210 is switched between opening and closing, and the main circuit controlled by the first contact assembly 220 is closed.

[0037] It should be noted that, in the embodiment of the present application, first, the present application sets the elastic member 150, so that when the driving part 140 contacts the elastic member 150, the elastic member 150 can provide the driving part 140 with an upward elastic force; when the moving iron core 120 continuously moves toward the static iron core 130 and is attracted with the static iron core 130, the driving part 140 can overcome the elastic force of the elastic member 150 to make the driving part 140 press down the travel switch 210. The whole process realizes differential delay, ensures that the pressure plate 143 presses down the travel switch 210 after the moving iron core 120 and the static iron core 130 are attracted, and improves the reliability of the switching mechanism 100 in quickly cutting off the electrical circuit.

[0038] Second, one end of the driving part 140 is movably connected to the first moving contact of the first contact assembly 220 of the contactor 200. When the moving iron core 120 rotates along the axial direction of the static iron core 130 and moves toward the static iron core 130, it can drive the driving part 140 to rotate, and the driving part 140 can drive the first moving contact to contact the static contact of the first contact assembly 220 to close the main circuit. Specifically, when the moving iron core 120 continuously rotates along the axial direction of the static iron core 130 and moves toward the static iron core 130, it can drive the driving part 140 to rotate, and the end of the driving part 140 can drive the first moving contact of the first contact assembly 220 to move toward the static contact and contact the static contact, thereby closing the first contact assembly 220.

[0039] Third, if Figure 7 and Figure 8 As shown, the travel switch 210 includes a second contact assembly 212, and the travel switch 210 is provided with a bracket 211, and the bracket 211 is connected to the second moving contact of the second contact assembly 212. When a pressing plate 143 is provided at one end of the driving part 140, when the pressing plate 143 presses down the bracket 211, the static contact of the second contact assembly 212 is disconnected from the second moving contact, so that the control circuit controlled by the travel switch 210 is switched between opening and closing. Specifically, a pressing plate 143 is provided at one end of the driving part 140, and the pressing plate 143 can overcome the elastic force of the elastic member 150 and move toward the direction of the travel switch 210 until it abuts against the bracket 211 provided on the travel switch 210. A second moving contact is provided on the bracket 211, and when the travel switch 210 presses down the second moving contact, the second moving contact is separated from the static contact of the second contact assembly 212, so that the second contact assembly 212 is opened.

[0040] The switching mechanism 100 provided in the present application includes a housing 110 and a moving iron core 120 and a stationary iron core 130 arranged relatively in the housing 110. A driving part 140 is connected to the side of the moving iron core 120 away from the stationary iron core 130. One end of the driving part 140 is movably connected to a first contact assembly 220 of a contactor 200. The first contact assembly 220 is used to realize the closing or opening of the main circuit. A travel switch 210 of the contactor 200 is arranged on the peripheral side of the driving part 140 to realize the closing or opening of the control circuit. The driving part 140 presses against the travel switch 210. 10 is used to switch the control circuit between opening and closing and close the main circuit; an elastic member 150 is also provided on the side of the travel switch 210 facing the driving part 140, and the elastic member 150 is provided on the inner wall of the housing 110; the moving iron core 120 is driven to move in the direction of the static iron core 130, and the driving part 140 is driven to rotate, and the side of the driving part 140 facing the travel switch 210 can abut against the elastic member 150, the moving iron core 120 and the static iron core 130 are attracted, and the driving part 140 overcomes the elastic force of the elastic member 150 and separates from the elastic member 150 and moves to contact with the travel switch 210. The switching mechanism 100 obtained by the above design can achieve differential delay between the process of the pressure plate 143 pressing down the travel switch 210 and the process of the moving iron core 120 and the stationary iron core 130 being attracted through the resistance of the rocker arm 142, the pressure plate 143 and the elastic member 150, thereby ensuring that the pressure plate 143 presses down the travel switch 210 after the moving iron core 120 and the stationary iron core 130 are attracted, thereby improving the reliability of the switching mechanism 100 in quickly cutting off the electrical circuit.

[0041] Furthermore, the driving part 140 includes a rocker arm 142 and a pressure plate 143 hinged on the rocker arm 142, one end of the rocker arm 142 is movably connected to the first contact assembly 220 of the contactor 200, and the moving iron core 120 is arranged on the side of the rocker arm 142 close to the static iron core 130; driving the moving iron core 120 to rotate axially along the static iron core 130 can drive the rocker arm 142 to rotate axially along the static iron core 130, so that the pressure plate 143 contacts the elastic member 150 and the travel switch 210 in turn.

[0042] Specifically, Figure 3 and Figure 4As shown, the driving part 140 includes a rocker arm 142, one end of which is movably connected to the first contact assembly 220 of the contactor 200, and a moving iron core 120 is also provided on the side of the rocker arm 142 close to the static iron core 130, so that when the moving iron core 120 rotates along the axial direction of the static iron core 130 and moves toward the static iron core 130, the rocker arm 142 can swing together. Driving the moving iron core 120 to rotate along the axial direction of the static iron core 130 can drive the rocker arm 142 to rotate along the axial direction of the static iron core 130; a pressure plate 143 is also hinged on the rocker arm 142, and the pressure plate 143 can swing with the rocker arm 142 and be mortgaged with the elastic member 150; when the moving iron core 120 and the static iron core 130 are attracted, the pressure plate 143 can overcome the elastic force of the elastic member 150 and contact the travel switch 210, so that the movement process of the switching mechanism 100 is more efficient and reliable.

[0043] Furthermore, the rocker arm 142 includes a shell 141 , a return spring 144 is disposed inside the shell 141 , one end of the pressure plate 143 is fixedly connected to the return spring 144 , and the other end extends to the outer wall of the shell 141 and can contact the elastic member 150 .

[0044] Specifically, Figure 3 and Figure 4 As shown, the rocker arm 142 is also provided with a shell 141, and a reset spring 144 is arranged inside the shell 141, and the reset spring is arranged along the movement direction of the moving iron core 120 toward the static iron core 130; one end of the pressure plate 143 is fixedly connected to the reset spring 144, and the other end extends to the outer wall of the shell 141 to contact with the elastic member 150; when the rocker arm 142 rotates to drive the pressure plate 143 to rotate, the pressure plate 143 contacts with the elastic member 150 and abuts against the elastic member 150 due to the elastic force of the elastic member 150, the reset spring 144 is stretched by the movement of the rocker arm 142 and the elastic force of the elastic member 150, and the elastic member 150 is compressed under the tension of the reset spring 144, so that the pressure plate 143 can overcome the elastic force of the elastic member 150 and move toward the direction of the travel switch 210.

[0045] By cooperating with the reset spring 144 and the elastic member 150, the coordination relationship between the pressure plate 143 and the rocker arm 142 during their movement can be made closer, so that the movement process of the pressure plate 143 and the attraction process of the moving and static iron cores 130 can achieve differential delay, ensuring that the pressure plate 143 presses down the travel switch 210 after the moving iron core 120 and the static iron core 130 are attracted, thereby improving the reliability of the switching mechanism 100 in quickly cutting off the electrical circuit.

[0046] In a feasible implementation of the present application, the travel switch 210 includes a bracket 211 protruding from the housing 110 and extending to one side of the rocker arm 142. The pressure plate 143 can overcome the elastic force of the elastic member 150 and press down the bracket 211 to open the control circuit.

[0047] Specifically, Figure 1 As shown, the limit switch 210 includes a bracket 211 protruding from the housing 110, and the bracket 211 extends toward one side of the rocker arm 142 to be arranged on the peripheral side of the rocker arm 142. When the pressure plate 143 breaks through the elasticity of the elastic member 150 and moves toward the direction of the limit switch 210, it can press down the bracket 211 of the limit switch 210 to switch the control circuit between opening and closing.

[0048] By setting the bracket 211, the pressure plate 143 can act on the travel switch 210 more easily and reliably to ensure the opening and closing conversion of the control circuit, thereby improving the reliability of the switching mechanism 100 in quickly cutting off the electrical circuit.

[0049] Furthermore, the pressure plate 143 includes a second body 1431, a first connecting plate 1432 and a second connecting plate 1433, the second connecting plate 1433 is vertically arranged at the end of the first connecting plate 1432, the second body 1431 is vertically arranged at an end of the second connecting plate 1433 away from the first connecting plate 1432, and the first connecting plate 1432 is fixedly connected to the reset spring 144; the housing 141 of the rocker arm 142 is provided with an opening on one side facing the elastic member 150, and the second body 1431 extends out and extends from the opening so as to be able to contact the elastic member 150.

[0050] Specifically, Figure 4 As shown, the pressing plate 143 includes a second body 1431, a first connecting plate 1432 and a second connecting plate 1433. The first connecting plate 1432 is fixedly connected to the reset tension spring 144, and the setting direction of the first connecting plate 1432 is perpendicular to the setting direction of the reset tension spring 144; the second connecting arm is vertically connected to the end of the first connecting plate 1432, and the second body 1431 is vertically connected to the end of the second connecting plate 1433 away from the first connecting plate 1432, so that the pressing plate 143 structure is roughly Z-shaped.

[0051] An opening is provided on one side of the housing 141 of the rocker arm 142 facing the elastic member 150 , and the second body 1431 can extend out of the rocker arm 142 through the opening to abut against the elastic member 150 .

[0052] Through such a setting, the pressure plate 143 can be subjected to the tension and elastic force from the return tension spring 144 and the elastic member 150 respectively, so that the process in which the pressure plate 143 gradually overcomes the balance and overcomes the elastic force from the state of abutment with the elastic member 150 due to the action of the tension and elastic force is more reliable and coherent.

[0053] In a feasible embodiment of the present application, the shell 110 includes a first limiting portion 111 and a second limiting portion 112 which are spaced apart from each other. The first limiting portion 111 and the second limiting portion 112 are relatively arranged along the movement direction of the pressure plate 143 to respectively clamp the opposite ends of the elastic member 150.

[0054] The elastic member 150 includes a first main body 151, a first clamping portion 152 and a second clamping portion 153. The first clamping portion 152 and the second clamping portion 153 are respectively vertically connected to the opposite sides of the first main body 151. The first clamping portion 152 can be clamped in the first limiting portion 111, and the second clamping portion 153 can be clamped in the second limiting portion 112, so that the elastic member 150 has an arc-shaped structure.

[0055] Specifically, Figure 5 As shown, a first limiting portion 111 and a second limiting portion 112 are also provided on the shell 110, wherein the first limiting portion 111 and the second limiting portion 112 are relatively arranged along the movement direction of the pressure plate 143 and have a certain interval to respectively clamp the opposite ends of the elastic member 150.

[0056] Correspondingly, if Figure 6 As shown, the elastic member 150 includes a first body 151, a first engaging portion 152 and a second engaging portion 153. The first engaging portion 152 and the second engaging portion 153 are respectively vertically connected to opposite sides of the first body 151, and can be respectively engaged with the first limiting portion 111 and the second limiting portion 112. The elastic member 150 can be fixedly connected with the first limiting portion 111 and the second limiting portion 112 through the first engaging portion 152 and the second engaging portion 153, respectively, so that the middle part of the elastic member 150 is convex and presents an arc-shaped structure.

[0057] By setting the first limiting portion 111, the second limiting portion 112, the first engaging portion 152 and the second engaging portion 153, the elastic member 150 can be stably connected to the housing 110, thereby improving the stability of the switching mechanism 100. At the same time, such a setting makes the middle part of the elastic member 150 always protrude and present an arc-shaped structure, ensuring that the pressing plate 143 can receive the elastic force of the elastic member 150 and abut against the elastic member 150, so that the movement process of the pressing plate 143 and the attraction process of the moving and static iron cores 130 are differentially delayed, ensuring that the pressing plate 143 presses down the travel switch 210 after the moving iron core 120 and the static iron core 130 are attracted, thereby improving the reliability of the switching mechanism 100 to quickly cut off the electrical circuit.

[0058] On the other hand, an embodiment of the present application provides a contactor 200, including a first contact assembly 220, a limit switch 210 and the above-mentioned switching mechanism 100, wherein the driving portion 140 of the switching mechanism 100 can press against the limit switch 210 to close the main circuit controlled by the first contact assembly 220 and switch the control circuit controlled by the limit switch 210 between opening and closing.

[0059] Specifically, the present application also provides a contactor 200, such as Figure 1 , Fig. 9 As shown, the contactor 200 includes a first contact assembly 220, a travel switch 210 and the above-mentioned switching mechanism 100. The first contact assembly 220 can control the main circuit to close or be closed, and the travel switch 210 can realize the control circuit to open or be closed. When the driving part 140 of the switching mechanism 100 presses against the travel switch 210, the main circuit controlled by the first contact assembly 220 can be closed, and the control circuit controlled by the travel switch 210 can be opened and closed. The contactor 200 obtained by the above design can ensure that the pressure plate 143 presses down the travel switch 210 after the moving iron core 120 and the static iron core 130 are attracted, thereby improving the reliability of the switching mechanism 100 to quickly cut off the electrical circuit. Among them, the specific structure and beneficial effects of the switching mechanism 100 have been described in detail above, and will not be repeated here.

[0060] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A switching mechanism, characterized in that: The invention comprises a housing (110) and a moving iron core (120) and a stationary iron core (130) arranged relatively in the housing (110); a driving part (140) is connected to a side of the moving iron core (120) facing away from the stationary iron core (130); one end of the driving part (140) is movably connected to a first contact assembly (220) of a contactor (200); a travel switch (210) of the contactor (200) is arranged on the peripheral side of the driving part (140); the driving part (140) presses against the travel switch (210) to switch the control circuit controlled by the travel switch (210) between opening and closing, and to close the main circuit controlled by the first contact assembly (220); An elastic member (150) is also provided on the side of the travel switch (210) facing the driving part (140), and the elastic member (150) is provided on the inner wall of the housing (110); the moving iron core (120) is driven to move along the direction of the static iron core (130), and the driving part (140) is driven to rotate, and the side of the driving part (140) facing the travel switch (210) can abut against the elastic member (150), the moving iron core (120) and the static iron core (130) are attracted, and the driving part (140) overcomes the elastic force of the elastic member (150) to separate from the elastic member (150) and move to contact with the travel switch (210).

2. The switching mechanism according to claim 1, characterized in that: The driving part (140) includes a rocker arm (142) and a pressure plate (143) hinged on the rocker arm (142); one end of the rocker arm (142) is movably connected to the first contact assembly (220) of the contactor (200); the moving iron core (120) is arranged on a side of the rocker arm (142) close to the static iron core (130); the moving iron core (120) is driven to rotate axially along the static iron core (130), which can drive the rocker arm (142) to rotate axially along the static iron core (130), so that the pressure plate (143) contacts the elastic member (150) and the travel switch (210) in turn.

3. The switching mechanism according to claim 2, characterized in that: The rocker arm (142) comprises a housing (141), a return spring (144) is arranged inside the housing (141), one end of the pressure plate (143) is fixedly connected to the return spring (144), and the other end extends to the outer wall of the housing (141) and can contact the elastic member (150).

4. The switching mechanism according to claim 2, characterized in that: The travel switch (210) comprises a bracket (211) protruding from the housing (110) and extending to one side of the rocker arm (142); the pressure plate (143) can overcome the elastic force of the elastic member (150) and press down the bracket (211) to switch the control circuit on and off.

5. The switching mechanism according to claim 2, characterized in that: The housing (110) comprises a first limiting portion (111) and a second limiting portion (112) which are arranged at intervals, and the first limiting portion (111) and the second limiting portion (112) are arranged relatively to each other along the movement direction of the pressing plate (143) so as to respectively clamp the opposite ends of the elastic member (150).

6. The switching mechanism according to claim 5, characterized in that: The elastic member (150) comprises a first body (151), a first clamping portion (152) and a second clamping portion (153); the first clamping portion (152) and the second clamping portion (153) are respectively vertically connected to opposite sides of the first body (151); the first clamping portion (152) can be clamped in the first limiting portion (111), and the second clamping portion (153) can be clamped in the second limiting portion (112), so that the elastic member (150) has an arc-shaped structure.

7. The switching mechanism according to claim 3, characterized in that: The pressure plate (143) includes a second body (1431), a first connecting plate (1432) and a second connecting plate (1433), wherein the second connecting plate (1433) is arranged at the end of the first connecting plate (1432), the second body (1431) is arranged at an end of the second connecting plate (1433) away from the first connecting plate (1432), and the first connecting plate (1432) is fixedly connected to the reset spring (144); an opening is provided on the side of the housing (141) of the rocker arm (142) facing the elastic member (150), and the second body (1431) protrudes and extends from the opening so as to be able to contact the elastic member (150).

8. The switching mechanism according to claim 4, characterized in that: The travel switch (210) includes a second contact assembly, and the bracket (211) of the travel switch (210) is connected to the second moving contact of the second contact assembly. When the pressure plate (143) presses down the bracket (211), the static contact of the second contact assembly is disconnected from the second moving contact, so that the control circuit controlled by the travel switch (210) is switched between opening and closing.

9. The switching mechanism according to claim 1, characterized in that: One end of the driving part (140) is movably connected to the first moving contact of the first contact assembly (220) of the contactor (200); when the moving iron core (120) moves along the direction of the stationary iron core (130), it can drive the driving part (140) to rotate; the driving part (140) can drive the first moving contact to contact the stationary contact of the first contact assembly (220) to close the main circuit.

10. A contactor, characterized in that: The invention comprises a first contact assembly (220), a travel switch (210) and a switching mechanism (100) as described in any one of claims 1 to 9, wherein a driving portion (140) of the switching mechanism (100) is capable of pressing against the travel switch (210) to close a main circuit controlled by the first contact assembly (220) and to open or close a control circuit controlled by the travel switch (210).

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