WO2017167086A1

WO2017167086A1 - Make/break mechanism for electrical switch

Info

Publication number: WO2017167086A1
Application number: PCT/CN2017/077637
Authority: WO
Inventors: 贾峰; 奚泓; 郑捷欣; 李思泓; 黄悲鸣; 曾萍; 顾长恂; 钟晨初
Original assignee: 上海电科电器科技有限公司; 浙江正泰电器股份有限公司
Priority date: 2016-03-30
Filing date: 2017-03-22
Publication date: 2017-10-05
Also published as: CN105679619B; CN105679619A

Abstract

An electrical switch making and breaking mechanism, connected in an electrical switch loop and comprising: a pull rod (101), a contact support member (102), a connecting rod (103), a contact bridge (104) and a sliding block (105). The contact bridge is mounted on the sliding block; the connecting rod is rotatably connected to the sliding block; the contact bridge is positioned between the connecting rod and the sliding block; the contact support member is hollow, having internally a positioning hole; the contact support member is mounted over the sliding block and the contact bridge; the connecting rod is accommodated in the positioning hole of the contact support member; and the pull rod is connected to the connecting rod. The contact bridge is connected to an inlet terminal (205) and an outlet terminal (206) of the loop, making the loop. Operating the contact support member causes the contact bridge to separate from the inlet terminal and outlet terminal of the loop, breaking the loop; or, electrodynamic repulsion repels the contact bridge from the inlet terminal and outlet terminal of the loop, breaking the loop, while the contact support member maintains the loop in a broken position. Different components of the making and breaking mechanism execute ordinary making and breaking, non-short circuit fault breaking and short circuit fault breaking, allowing for upkeep of the mechanical strength, service life and breaking speed of the mechanism.

Description

Switching mechanism of electrical switch

Technical field

The present invention relates to the field of low voltage electrical appliances, and more particularly to an on-off mechanism for electrical switches.

Background technique

The electrical switch can switch on and off the normal operating current and break the loop in the event of a fault to protect the electrical equipment in the loop. The breaking demand for the electrical switch is that it is desirable to achieve the breaking as soon as possible in the event of a fault, and it is desirable that the electrical switch has a long service life and reliability.

Due to the different causes of the failure, there is a certain contradiction in the above requirements. Typical causes of failure include non-short circuit faults and short circuit faults. For non-short-circuit faults, the breaking speed is not high because there is no large short-circuit current in the loop. At this time, in order to ensure the service life of the electrical switch, it is desirable to increase the mechanical strength of the component. Therefore, it is considered to use a material having a higher density and a better mechanical strength to make the component, and the volume and weight of the component are relatively large, thereby obtaining a better Mechanical strength to extend service life. However, the short-circuit fault has a high requirement on the breaking speed. Since the short-circuit current is large, it is desirable to break the loop as soon as possible. For short-circuit faults, the electric repulsion generated by the short-circuit current is the main source of power for the breaking circuit. In the case of the same electric repulsion, the light-weight and small-sized components have a faster response speed and are more suitable for the demand.

At present, the on-off mechanism of the electrical switch uses the same set of components to achieve non-short-circuit fault breaking and short-circuit fault breaking. It is obvious that the requirements of the two are different, and there is a contradiction between mechanical strength, service life and breaking speed.

Summary of the invention

The invention aims to propose an on-off mechanism of an electrical switch, taking into consideration mechanical strength and breaking speed.

According to an embodiment of the invention, an on/off mechanism of an electrical switch is provided, connected to The circuit of the electrical switch includes: a tie rod, a contact support member, a connecting rod, a contact bridge and a slider. The contact bridge is arranged on the slider, the connecting rod is rotatably connected to the slider, the contact bridge is located between the connecting rod and the sliding block, the contact supporting member is hollow, the inner limiting hole is provided, and the contact supporting member is erected on the sliding block and the contact On the bridge, the connecting rod is received in the limiting hole of the contact support, and the pull rod is connected to the connecting rod. The contact bridge is connected to the incoming and outgoing ends of the circuit, and the loop is connected. Operating the contact support member, so that the contact bridge is separated from the incoming end and the outgoing end of the circuit, and the loop is disconnected, or the electric repulsion replies the incoming end and the outgoing end of the contact bridge and the loop, the loop is disconnected, and the contact support member Maintain the loop in the off position.

In one embodiment, the reaction force spring is coupled to the slider through which the contact bridge is coupled to the incoming and outgoing ends of the circuit. The electromagnetic operating mechanism is connected to the contact support member, and the electromagnetic operating mechanism operates the contact support member. The contact support member separates the contact bridge from the incoming end and the outgoing end of the circuit to perform normal breaking. The operating mechanism is connected to the contact support member, the operating mechanism trips and operates the contact support member, and the contact support member separates the incoming and outgoing ends of the contact bridge from the loop and maintains the separated position, thereby performing non-short-circuit fault breaking. The electric repulsion dissipates the incoming and outgoing ends of the contact bridge and the circuit, and the circuit is disconnected. The connecting rod drives the operating mechanism to trip through the pull rod to maintain the circuit in the disconnected position.

In one embodiment, the slider has spacers at both ends and the middle portion in the longitudinal direction, and has brackets at both sides in the width direction at both sides in the longitudinal direction, and the shaft holes are formed in the bracket. The contact bridge is arranged on the slider, and the spacer on the slider forms a support for the contact bridge. The two ends of the contact bridge have contacts, and the middle portion of the contact bridge has a block, and the position of the block is opposite to the position of the bracket on the slider. Correspondingly, the block and the bracket cooperate to make the position of the contact bridge on the slider relatively fixed. The bottom of the connecting rod has a laterally extending connecting shaft, and the connecting shaft is placed in the shaft hole such that the connecting rod is coupled to the slider, and the connecting rod is rotatable relative to the slider through the connecting shaft and the shaft hole.

In one embodiment, the upper portion of the connecting rod has a connecting hole. The pull rod includes a top hook body and a lower leg. The hook body is connected to the operating mechanism, and the leg protrudes into the connecting hole of the upper portion of the connecting rod, and the pull rod moves along with the connecting rod.

In one embodiment, the contact support member has a groove on a side wall facing the side of the pull rod, the groove is such that the pull rod is connected to the connecting rod and follows the movement of the pull rod, and the contact support member is on both sides of the bottom end, corresponding to the slider The position of the bracket forms an opening and a stopper, and the opening and the stopper are engaged on the connecting shaft of the connecting rod and cooperate with the connecting shaft together with the bracket.

In one embodiment, the top surface of the contact support has a plurality of working faces that cooperate with an electromagnetic operating mechanism or operating mechanism, respectively.

In one embodiment, the electromagnetic operating mechanism has a pressure plate that swings up and down, the pressure plate mating with the first working surface of the contact support. The pressure plate is upward and does not contact the first working surface, and the reaction force spring connects the contact bridge with the incoming end and the outgoing end of the circuit, and the circuit is normally connected. The pressure plate is downward, is in contact with the first working surface, and the contact support member is downward, pushing the contact bridge and the incoming end and the outgoing end of the circuit to separate, and the circuit is normally disconnected.

In one embodiment, the operating mechanism has an actuating link that mates with a second working surface of the contact support. The operating mechanism does not operate, and the action link does not contact the second working surface. In the case of non-short-circuit fault, the operating mechanism is tripped, the action link is in contact with the second working surface, the contact support member is downward, and the incoming and outgoing ends of the contact bridge and the circuit are pushed apart, and the loop is not short-circuited and broken.

In one embodiment, the operating mechanism has a lever that is coupled to the drawbar. Under the short-circuit fault, the incoming and outgoing ends of the contact bridge and the circuit are disengaged, the lever drives the lever, the lever causes the operating mechanism to trip, the action link of the operating mechanism contacts the second working surface, and the contact support member is downwardly maintained. The incoming and outgoing ends of the bridge and the loop are in the separated position, and the loop short circuit is broken.

The on-off mechanism of the electrical switch of the invention is executed by different components for normal on-off, non-short-circuit fault breaking and short-circuit fault breaking, taking into account the mechanical strength, service life and breaking speed of the mechanism, satisfying and reliable breaking and longer Service life requirements.

DRAWINGS

The above and other features, aspects, and advantages of the present invention will become more apparent from the description of the appended claims appended claims

1 is a block diagram showing an on-off mechanism of an electrical switch in accordance with an embodiment of the present invention.

2 is an exploded structural view showing an on-off structure of an electrical switch according to an embodiment of the present invention.

3a and 3b illustrate assembly structures of a connecting rod, a contact bridge, and a slider in an on-off mechanism of an electrical switch in accordance with an embodiment of the present invention.

4 is a view showing an assembly structure of an on-off mechanism, an inlet end, an outlet end, and an operating mechanism of an electrical switch according to an embodiment of the present invention.

FIG. 5 is a view showing an assembly structure of an on-off mechanism and an inlet end, an outlet end, an operating mechanism, and an electromagnetic operating mechanism of an electric appliance switch according to an embodiment of the present invention.

Figures 6a, 6b and 6c illustrate a schematic diagram of a switch-on mechanism of an electrical switch in accordance with an embodiment of the present invention in conjunction with an electromagnetic operating mechanism to perform a normal switch-on.

FIG. 7 is a schematic diagram showing the breaking and breaking mechanism of the electrical switch of the embodiment of the present invention cooperates with the operating mechanism to perform fault breaking except for the short circuit.

FIG. 8 is a schematic diagram showing the short-circuit fault breaking performed by the on-off breaking mechanism of the electrical switch according to an embodiment of the present invention and the operating mechanism.

detailed description

The invention provides an on-off mechanism of an electrical switch connected to a circuit of an electrical switch, comprising: a pull rod, a contact support member, a connecting rod, a contact bridge and a slider. The contact bridge is arranged on the slider, the connecting rod is rotatably connected to the slider, the contact bridge is located between the connecting rod and the sliding block, the contact supporting member is hollow, the inner limiting hole is provided, and the contact supporting member is erected on the sliding block and the contact On the bridge, the connecting rod is received in the limiting hole of the contact support, and the pull rod is connected to the connecting rod. The contact bridge is connected to the incoming and outgoing ends of the circuit, and the loop is connected. Operating the contact support member, so that the contact bridge is separated from the incoming end and the outgoing end of the circuit, and the loop is disconnected, or the electric repulsion replies the incoming end and the outgoing end of the contact bridge and the loop, the loop is disconnected, and the contact support member Maintain the loop in the off position. In general, the present invention performs the breaking of different components for different breaking situations. Normal break and non-short circuit fault breaks are performed by the contact support. Short-circuit breaking is first performed by the contact bridge and then locked by the contact holder. The balance between mechanical strength, service life and breaking speed is achieved by different components.

Referring to FIG. 1 and FIG. 2, FIG. 1 discloses a structural view of an on-off mechanism of an electrical switch according to an embodiment of the present invention, and FIG. 2 is an exploded structural view of the on-off mechanism of the electrical switch.

As shown, the on-off mechanism 201 of the electrical switch includes a pull rod 101, a contact support member 102, a link 103, a contact bridge 104, and a slider 105.

Referring to Figures 3a and 3b, Figures 3a and 3b illustrate the assembled structural view of the connecting rod, the contact bridge and the slider, from which the structure of the connecting rod 103, the contact bridge 104 and the slider 105 and the manner of assembly thereof are visible. The slider 105 has a spacer 151 at both ends and in the middle in the longitudinal direction. On both sides in the width direction, a bracket 152 is provided at a position intermediate the longitudinal direction, and a shaft hole 153 is formed in the bracket 152. The contact bridge 104 has an elongated shape as a whole and is mounted on the slider 105. The spacer 151 on the slider 105 forms a support for the contact bridge 104, and the spacers 151 at the both ends and the middle support the middle and both ends of the contact bridge 104, respectively. Both ends of the contact bridge 104 have contacts 141. The middle of the contact bridge 104 has a block 142 that is positioned corresponding to the position of the bracket 152 on the slider 105. The block 142 cooperates with the bracket 152 such that the position of the contact bridge 104 on the slider 105 is relatively fixed. The link 103 has a cylindrical shape, and the bottom of the link 103 has a laterally extending connecting shaft 131, and the connecting shaft 131 is placed in the shaft hole 153 such that the link 103 is coupled to the slider 105. The link 103 is rotatable relative to the slider 105 through the connecting shaft 131 and the shaft hole 153. Contact bridge 104 is located between link 103 and slider 105. The connecting rod 103 can be rotated relative to the slider 105 through the connecting shaft 131, so that the contact bridge 104 has a certain movable space, so that the contacts at the two ends of the contact bridge 104 can be kept with the static contacts at the incoming and outgoing ends of the two sides. Contact to avoid the problem of loop failure due to contact bridge deflection. The link 103 has a connection hole 132 at an upper portion thereof.

The contact support 102 is a hollow structure having an outer contour of a substantially rectangular parallelepiped. The contact support member 102 has a limiting hole, and the connecting rod 103 is received in the limiting hole. The shape and size of the limiting hole should be such that the movement of the link 103 therein is not limited, and it is free to move up and down or to rotate about the connecting shaft 131 within a certain range. The contact holder 102 has a groove 121 formed in a side wall facing the side of the tie rod 101, and the groove 121 enables the tie rod 101 to be coupled to the link 103 and to follow the movement. The contact holders 102 are formed on the two sides of the bottom end, corresponding to the position of the bracket 152 of the slider 105 to form the opening 122 and the stopper 123. The opening 122 and the stopper 123 are engaged with the connecting shaft 131 of the link 103, and cooperate with the bracket 152 together with the connecting shaft 131. The opening 122 and the stop 123 allow the mounting position of the contact holder 102 to be substantially fixed, and are fixed relative to the slider 105 and the contact bridge 104. A plurality of working faces are formed on the top surface of the contact support member 102, respectively, which cooperate with the operating mechanism 202 and the electromagnetic operating mechanism 203, which will be described in detail later.

The tie rod 101 includes a top hook body 111 and a lower leg 112. The top hook 111 cooperates with the operating mechanism and will be described in detail later. The lower leg 112 projects into the connecting hole 132 in the upper portion of the link 103. Through the connection of the leg 112 to the connecting hole 132, the pull rod 111 will follow the link 103 to move up and down.

In the embodiment shown in Figs. 1 and 2, an on-off mechanism suitable for a three-phase electrical switch will be described as an example. Thus, the number of contact holders 102, links 103, contact bridges 104, and sliders 105 are all three, and each of the contact holders 102, the links 103, the contact bridges 104, and the sliders 105 serve one phase. The legs 101 of the tie rods 101 are three, and each of the legs 112 is connected to a link 103. Since the three phases are operated synchronously, only one of the hooks 111 is used, and the three legs 112 are connected to the same hook body 111 through the transverse connecting rods.

The switch-on mechanism 201 of the present invention cooperates with the operating mechanism 202, the electromagnetic operating mechanism 203, and the reaction force spring 204, and is connected to the circuit through the inlet end 205 and the outlet end 206 to realize the opening or breaking of the circuit of the switching device. 4 and 5 disclose an assembly structure diagram of the on-off breaking mechanism 201. FIG. 4 discloses an assembly structure diagram of the on-off breaking mechanism, the inlet end, the outlet end, and the operating mechanism. Fig. 5 is a view showing the assembly structure of the on-off breaking mechanism and the inlet end, the outlet end, the operating mechanism and the electromagnetic operating mechanism.

As shown, the inlet end 205 and the outlet end 206 have static contacts, respectively, and the stationary contacts are respectively located above the contacts at both ends of the contact bridge 104. The reaction force spring 204 is mounted below the slider 105, and the reaction force spring 204 provides an upward force to the slider 105 such that the contacts at both ends of the contact bridge 104 are in contact with the stationary contacts on the incoming end 205 and the outgoing end 206, respectively. The incoming end 205 and the outgoing end 206 are in communication via a contact bridge 104. The operating mechanism 202 and the electromagnetic operating mechanism 203 are generally mounted above the switch-on mechanism 201, and the operating mechanism 202 and the electromagnetic operating mechanism 203 act on the contact pins. The holding member 102 presses the contact support member 102 downward, and drives the contact bridge 104 and the slider 105 to move downward against the spring force of the reaction force spring 204, so that the contacts at both ends of the contact bridge 104 are separated from the static contacts, and the incoming line is separated. End 205 and outlet end 206 are disconnected.

Figures 6a, 6b and 6c illustrate a schematic diagram of a switch-on mechanism of an electrical switch in accordance with an embodiment of the present invention in conjunction with an electromagnetic operating mechanism to perform a normal switch-on. The electromagnetic operating mechanism 203 is used to achieve normal on-off. The electromagnetic operating mechanism 203 has a pressure plate 231 that can swing up and down. The front end of the pressure plate 231 is aligned with the first working surface 124 at the top of the contact support 102. In the ON state, the pressure plate 231 is swung upward, and the front end of the pressure plate 231 is not in contact with the first working surface 124. The contact holder 102 does not move downward. The action of the reaction spring 204 causes the contacts of the contact bridge 104 to contact the stationary contacts of the incoming end 205 and the outgoing end 206, and the incoming end 205 and the outgoing end 206 remain electrically connected. The pressure plate 231 is swung downward, the front end of the pressure plate 231 is in contact with the first working surface 124, the pressing plate 231 acts on the first working surface 124 to press the contact support member 102 downward, and the contact support member 102 moves downward to drive the contact bridge 104. And the slider 105 moves downward against the spring force of the reaction force spring 204, the contact on the contact bridge 104 is separated from the static contact of the inlet end 205 and the outlet end 206, and the electrical connection between the inlet end 205 and the outlet end 206 is broken. open.

FIG. 7 is a schematic diagram showing the breaking and breaking mechanism of the electrical switch of the embodiment of the present invention cooperates with the operating mechanism to perform fault breaking except for the short circuit. The operating mechanism 202 is used to implement fault breaking in addition to the short circuit. The operating mechanism 202 has an action link 222 that aligns with the second working surface 125 at the top of the contact support 202. When no fault occurs, the operating mechanism 202 does not act and the actuating link 222 remains in place. When a fault other than the short circuit occurs, the operating mechanism 202 trips, the action link 222 moves downward, presses down the second working surface 125 of the contact support member 102, and the contact support member 102 moves downward to drive the contact. The bridge 104 and the slider 105 move downward against the spring force of the reaction force spring 204. The contacts on the contact bridge 104 are separated from the stationary contacts of the incoming end 205 and the outgoing end 206, and the electrical input terminal 205 and the outgoing terminal 206 are electrically connected. Disconnect.

When the fault is normally turned on and off, and the fault other than the short circuit is broken, the requirement for the breaking speed is not high. Therefore, in the on-off breaking mechanism of the present invention, the above two kinds of breaking are realized by the contact supporting member 102, and the contact supporting member 102 can be made of materials with high density and good mechanical properties, and It has a certain volume and thickness to ensure strength and force capacity to improve the overall mechanical life of the switch-on mechanism. Since the above two kinds of breaking are not required for the breaking speed, the larger and heavier contact support does not affect the overall electrical performance.

FIG. 8 is a schematic diagram showing the short-circuit fault breaking performed by the on-off breaking mechanism of the electrical switch according to an embodiment of the present invention and the operating mechanism. In the event of a short circuit fault, the electric repulsion due to the short circuit current directly detaches the contacts on the contact bridge from the static contacts. In the absence of other components, the electric repulsive force is greater than the spring force of the reaction force spring 204, and the electric repulsive force presses the contact bridge 104 and the slider 105 downward, so that the electrical connection between the inlet end 205 and the outlet end 206 is broken. After the contact bridge 104 is moved downward, the link 103 is moved downward together, and the leg 112 of the tie rod 101 is connected to the link 103, so that the tie rod 101 moves downward along with the link 103. After the pull rod 101 is downward, the hook body 111 comes into contact with the lever 221 of the operating mechanism 202, and the lever 221 is pulled downward to cause the operating mechanism 202 to trip. After the operating mechanism 202 is tripped, the action link 222 moves downward and presses against the second working surface 125 of the contact support member 102. Under the action of the action link 222, the contact support member 102 also moves downward and is pressed. The contact bridge 104 and the slider 105 prevent the contact bridge 104 from springing back, so that the electrical connection between the inlet end 205 and the outlet end 206 is stably disconnected, and the circuit is broken.

In the event of a short-circuit fault that requires breaking, there is a requirement for the breaking speed, and it is desirable to break it as soon as possible. When the short-circuit fault breaking mechanism of the present invention performs the short-circuit fault breaking, only the components such as the contact bridge 104, the slider 105, the connecting rod 103 and the tie rod 101 operate, and these components are small in size and light in weight, and can be used in the electric repulsion function. Act quickly and quickly break down. After the circuit is broken, the electric repulsion disappears, and in order to prevent the reaction force spring 204 from causing the slider 105 and the contact bridge 104 to spring back to reconnect the circuit, the tie rod 101 is designed. The pull rod 101 can trip the operating mechanism 202 through the lever 221, and then the contact support member 102 is pressed down by the action link 202, and the contact bridge 104 and the slider 105 are pressed against the rebound to ensure reliable breaking of the circuit.

With continued reference to Fig. 8, in order to prevent the lever 101 from accidentally acting during normal turn-on and break, a sufficient distance is left between the tie rod 101 and the lever 221. When the pressure plate 231 of the electromagnetic operating mechanism 203 swings up and down, the moving distance of the pull rod with the connecting rod is small, so that the lever 221 is not touched to cause the operating mechanism to trip. In the event of a short circuit fault, the electric repulsion will smash the contact bridge 104 a larger distance Off, therefore, the drawbar 101 moves a large distance following the link 103, contacting the lever 221, causing the operating mechanism 202 to trip.

The above embodiments are provided to those skilled in the art to implement or use the present invention, and those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept. The scope of the invention is not limited by the embodiments described above, but should be the maximum range of the inventive features as claimed.

Claims

An on/off mechanism of an electrical switch connected to a circuit of an electrical switch, characterized in that: a pull rod, a contact support member, a connecting rod, a contact bridge and a slider;

The contact bridge is arranged on the slider, the connecting rod is rotatably connected to the sliding block, the contact bridge is located between the connecting rod and the sliding block, the contact supporting member is hollow, the contact supporting member is erected on the sliding block and the contact bridge, and the connecting rod accommodates In the contact support member, the pull rod is connected to the connecting rod;

The contact bridge is connected to the incoming end and the outgoing end of the loop, and the loop is connected;

Operating the contact support member, so that the contact bridge is separated from the incoming end and the outgoing end of the circuit, and the loop is disconnected, or the electric repulsion replies the incoming end and the outgoing end of the contact bridge and the loop, the loop is disconnected, and the contact support member Maintain the loop in the off position.
The switch-on mechanism according to claim 1, wherein

a reaction spring is connected to the slider, and the contact bridge is connected to the incoming end and the outgoing end of the loop through the slider;

The electromagnetic operating mechanism is connected to the contact support member, and the electromagnetic operating mechanism operates the contact support member, and the contact bridge is separated from the incoming end and the outgoing end of the circuit by the contact support member to perform normal breaking;

The operating mechanism is connected to the contact support member, the operating mechanism trips and operates the contact support member, and the contact support member separates the inlet end and the outlet end of the circuit from the contact support and maintains the separated position, and performs non-short-circuit fault breaking;

The electric repulsion dissipates the incoming and outgoing ends of the contact bridge and the circuit, and the circuit is disconnected. The connecting rod drives the operating mechanism to trip through the pull rod to maintain the circuit in the disconnected position.
The switch-on and disconnect mechanism of the electrical switch according to claim 2, wherein

The slider has a spacer at both ends and a middle portion in the longitudinal direction, and has a bracket at a position in the middle of the longitudinal direction on both sides in the width direction, and a shaft hole is formed on the bracket;

The contact bridge is erected on the slider, and the spacer on the slider forms a support for the contact bridge, and two of the contact bridge The end has a contact, the middle of the contact bridge has a block, the position of the block corresponds to the position of the bracket on the slider, and the block cooperates with the bracket such that the position of the contact bridge on the slider is relatively fixed;

The bottom of the connecting rod has a laterally extending connecting shaft, and the connecting shaft is placed in the shaft hole such that the connecting rod is coupled to the slider, and the connecting rod is rotatable relative to the slider through the connecting shaft and the shaft hole.
The switch-on and disconnect mechanism of the electrical switch according to claim 3, wherein

The upper portion of the connecting rod has a connecting hole;

The pull rod includes a top hook body and a lower leg. The hook body is connected to the operating mechanism, and the leg protrudes into the connecting hole of the upper portion of the connecting rod, and the pull rod moves along with the connecting rod.
The on/off mechanism of the electrical switch according to claim 4, wherein

The contact support member has a limiting hole, the connecting rod is received in the limiting hole, and the contact supporting member has a slot on the side wall facing the side of the pulling rod, the slot connecting the connecting rod with the connecting rod and following the pulling rod, the contact The support member is on both sides of the bottom end, and the position of the bracket corresponding to the slider forms an opening and a stopper, and the opening and the stopper are engaged on the connecting shaft of the connecting rod, and cooperate with the connecting shaft together with the bracket.
The switch-on and disconnect mechanism of the electrical switch according to claim 2, wherein the top surface of the contact support member has a plurality of working faces respectively engaged with the electromagnetic operating mechanism or the operating mechanism.
The on/off mechanism of the electrical switch according to claim 6, wherein the electromagnetic operating mechanism has a pressure plate that swings up and down, and the pressure plate cooperates with the first working surface of the contact support member;

The pressure plate is upward, and is not in contact with the first working surface, and the reaction force spring connects the contact bridge with the incoming end and the outgoing end of the circuit, and the loop is normally turned on;

The pressure plate is downward, is in contact with the first working surface, and the contact support member is downward, pushing the contact bridge and the incoming end and the outgoing end of the circuit to separate, and the circuit is normally disconnected.
The switch-on and disconnect mechanism of the electrical switch according to claim 6, wherein the operating mechanism has an action link, and the action link cooperates with the second working surface of the contact support member;

The operating mechanism does not move, and the action link does not contact the second working surface;

In the case of non-short-circuit fault, the operating mechanism is tripped, the action link is in contact with the second working surface, the contact support member is downward, and the incoming and outgoing ends of the contact bridge and the circuit are pushed apart, and the loop is not short-circuited and broken.
The switch-on and disconnect mechanism of the electrical switch according to claim 8, wherein the operating mechanism has a lever, and the lever is connected to the pull rod;

Under the short-circuit fault, the incoming and outgoing ends of the contact bridge and the circuit are disengaged, the lever drives the lever, the lever causes the operating mechanism to trip, the action link of the operating mechanism contacts the second working surface, and the contact support member is downwardly maintained. The incoming and outgoing ends of the bridge and the loop are in the separated position, and the loop short circuit is broken.