Electric switch

Abstract

The invention provides an electric switch. The electric switch at least comprises an insulating shell and an internal element, the internal elements at least comprise a thermal overload protection unit, an electromagnetic instantaneous protection unit, a release unit, a moving contact, a static contact and an operating mechanism, and at least two parts of the insulating shell or / and the internal elements are correspondingly provided with magnetizers or / and permanent magnets capable of generating magnetic attraction force. One of the magnetizers or / and the permanent magnets which are correspondingly arranged is a moving body, and the other one is a fixed body; magnetic attraction force is generated between the magnetizers or / and the permanent magnets to drive at least one part on the release unit to move to directly or indirectly cause the switch to trip and power off, and the action speed and hitting force of the release unit are enhanced by utilizing the attraction force generated between the permanent magnets or the attraction force generated between the permanent magnets and the magnetic conductive part. The tripping speed of the switch is improved, the breaking time is shortened, and the performance of the switch is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, and more specifically to an electrical switch. Background Technology

[0002] The overload and short circuit protection of existing switches is mainly achieved by thermal overload protection units and electromagnetic instantaneous protection units. Generally, electromagnetic instantaneous protection units are suitable for the protection of large overload currents or short circuit currents. They use the principle of electromagnets to strike the switch tripping mechanism to quickly disconnect the fault. Thermal overload protection units are suitable for the protection of smaller overload currents. They utilize the different resistance characteristics and thermal expansion coefficients of bimetallic materials. When the current is overloaded, the materials heat up, expand and bend, and rely on the bending force to drive the switch tripping unit to trip. The current form has two drawbacks.

[0003] 1. The bimetallic material of the thermal overload protection unit has insufficient bending thrust. Existing technologies address the insufficient thrust by increasing the thickness or width of the bimetallic material or reducing the locking force of the switch tripping mechanism to reduce the tripping force. Increasing the thickness or width of the bimetallic material to increase the thrust will reduce the bending stroke of the bimetallic material and will not be conducive to pushing the switch tripping mechanism. The solution of reducing the tripping force of the switch will cause the switch to slip easily and fail to close, or it will have poor shock resistance and be prone to malfunction during actual operation.

[0004] 2. The electromagnetic instantaneous protection unit's tripping speed is not fast enough. When a short circuit occurs, the electromagnet engages to overcome the return spring and strike the switch trip unit. Because the return spring increases in force as it is compressed, the tripping speed is significantly reduced, resulting in a slow switch breaking speed. According to Joule integral I... 2 t=∫ t1 t0 i 2 The larger the current and the longer the time, the greater the energy and the more severe the burn-out of the switch. Under the condition of constant current, shortening the breaking time can effectively reduce the Joule integral and improve the short-circuit breaking capacity of the switch. Summary of the Invention

[0005] Based on the above background, in order to solve at least one of the above problems, the present invention provides an electrical switch that can increase the operating speed and striking force of the trip unit, thereby overcoming the above problems.

[0006] This invention provides an electrical switch, characterized in that: the electrical switch includes at least an insulating shell and internal components; the internal components include at least a thermal overload protection unit, an electromagnetic instantaneous protection unit, a trip unit, a moving contact, a stationary contact, and an operating mechanism; at least two parts of the insulating shell and / or the internal components are correspondingly provided with magnetic conductive bodies and / or permanent magnets capable of generating magnetic attraction, one of the correspondingly provided magnetic conductive bodies and / or permanent magnets being a moving body and the other being a fixed body; the magnetic attraction generated between the magnetic conductive bodies and / or permanent magnets drives at least one part of the trip unit to move, directly or indirectly causing the switch to trip and disconnect the power.

[0007] In this way, by setting permanent magnets and / or magnetic conductors on two parts of the internal components of the switch, the mutual attraction between the permanent magnets and / or magnetic conductors allows the internal part, which is a moving body, to gradually approach the internal part, which is a fixed body, under the action of the thermal overload protection unit or the electromagnetic instantaneous protection unit. When they reach a distance where they can attract each other, the magnetic attraction accelerates the process, thereby increasing speed and force, promoting the rapid unlocking operation of the trip unit, and reducing the breaking time.

[0008] In some embodiments, the fixing body is a temporary or permanent fixing member disposed on the inner wall of the insulating housing and / or within the insulating housing.

[0009] In the above embodiments, the fixing body, as a component for fixing permanent magnets or magnetic conductors, can generally be set on the inner wall of the insulating shell, or on a fixing component set in the insulating shell, or on a component that can remain stationary after the switch is closed, as a component that promotes the movement speed of the moving body by magnetic attraction.

[0010] In some embodiments, the moving body is a movable internal element disposed within the insulating housing.

[0011] In the above embodiments, a permanent magnet and / or a magnetic conductor, which are movable bodies, are disposed on a movable internal component within an insulating housing. A magnetic attraction force is generated between the magnetic conductor and / or the permanent magnet, which are fixed components, thereby increasing the movement speed and force of the movable body and thus accelerating the tripping and opening speed of the switch.

[0012] In some embodiments, the trip unit includes at least: a moving trip lever and a latch. The thermal overload protection unit and / or the electromagnetic instantaneous protection unit directly or indirectly cause the moving body to gradually approach the fixed body, thereby increasing the magnetic attraction between them, increasing the force and speed at which the moving trip lever triggers the latch to trip, and causing the moving contact to quickly separate from the stationary contact.

[0013] In the above embodiment, the trip unit, which consists of a moving trip lever and a latch, is driven and triggered directly or indirectly by a thermal overload protection unit and / or an electromagnetic instantaneous protection unit. During the triggering process, the distance between the moving body and the fixed body gradually approaches, and the magnetic attraction between the two gradually becomes obvious until they accelerate and engage. The magnetic force will act on the trip unit to increase the action force and speed of the trip unit.

[0014] In some embodiments, the operating mechanism includes at least: an operating handle and a multi-link mechanism. The operating handle drives the multi-link mechanism to electrically connect or disconnect the moving contact and the stationary contact. The thermal overload protection unit and / or the electromagnetic instantaneous protection unit directly or indirectly causes the moving body to gradually approach the fixed body, thereby increasing the magnetic attraction between them, increasing the force and speed at which the moving trip lever triggers the latch to trip, and breaking the balance of the multi-link mechanism, so that the moving contact and the stationary contact quickly separate.

[0015] In the above embodiments, the operating mechanism can be manipulated by the operating handle to connect and disconnect the moving contact and the stationary contact. In the event of an overload or short circuit, the thermal overload protection unit or the electromagnetic instantaneous protection unit is activated, causing the moving body to gradually approach the fixed body and quickly engage. The engagement process is a sudden acceleration process, which is generated instantaneously when the distance is close enough, with relatively large force and speed. With this configuration, the thermal overload protection unit only needs to push the moving body, without having to overcome the reaction force of the operating mechanism and the trip unit. The reaction force is completely overcome by the attraction between the moving body and the fixed body, which greatly improves the operating speed of the switch and enhances the breaking capacity.

[0016] In some embodiments, the thermal overload protection unit includes at least a bimetallic element. When an overload current occurs in the switch, the bimetallic element heats up and bends to push the moving trip lever, directly or indirectly causing the moving body to gradually approach the fixed body. The magnetic attraction between the moving body and the fixed body increases accordingly, increasing the force and speed at which the moving trip lever triggers the latch to trip and causes the switch to open rapidly.

[0017] In the above embodiments, the thermal overload protection device is implemented using a bimetallic element, which is made of at least two layers of metal materials with different coefficients of thermal expansion. The overload current causes the heating and bending, which gradually brings the moving body and the fixed body closer together and generates a strong magnetic attraction force, thereby increasing the force and speed at which the moving release lever strikes the lock.

[0018] In some embodiments, the electromagnetic instantaneous protection unit includes at least an electromagnet and a triggering part. When a large overload current or short-circuit current occurs in the switch, the electromagnet attracts and drives the triggering part to push the motion tripping rod, directly or indirectly causing the moving body to gradually approach the fixed body. The magnetic attraction between the moving body and the fixed body increases accordingly, increasing the force and speed at which the motion tripping rod triggers the latch to trip and causes the switch to open rapidly.

[0019] In the above embodiment, the electromagnetic instantaneous protection unit adopts the principle of electromagnet. When a short circuit current occurs, the electromagnet is attracted due to the large current, which causes the trigger part to push the moving release lever, so that the distance between the moving body and the fixed body gradually approaches and generates a strong attraction force to increase the force and speed of the moving release lever striking the lock.

[0020] In some embodiments, the transient fixing component is a part of the switch operating mechanism that can remain stationary when the switch is closed and can move when the switch is open, and the permanent fixing component is a part that cannot move under any condition.

[0021] In the above embodiments, the fixing component has two forms: one is permanently fixed and the other is temporarily fixed. The permanently fixed component remains stationary whether the switch is closed or open, while the temporarily fixed component is an internal part that remains stationary when the switch is closed but can move when the switch is open.

[0022] In some embodiments, the movable component is a part of the switch operating mechanism that is movable in both the closed and open states.

[0023] In the above embodiments, the movable part is a switch that can move whether it is in the closed or open state. The permanent magnet or magnetic conductor is fixed on the movable part and magnetically attracted to the fixed part to accelerate the movement, thereby increasing the tripping force and tripping speed of the switch.

[0024] In some embodiments, the transient fixing member is at least a moving contact, and the permanent fixing member is at least an insulating housing and other parts fixedly disposed on the insulating housing.

[0025] In the above embodiments, the moving contact or indicator is a part that remains stationary after the circuit is closed. It can be used as a temporary fixing part, and a permanent magnet or magnetic conductor can be fixedly set on it. This can form a magnetic attraction between the permanent magnet and the moving part. For example, the insulating shell or other parts fixedly installed in the insulating shell are parts that cannot move whether the circuit is closed or open. Fixing a permanent magnet or magnetic conductor on them can form a magnetic attraction between the permanent magnet and the moving part, thereby increasing the thrust and speed of the tripping device, which can increase the breaking speed of the switch and improve the breaking capacity.

[0026] In some embodiments, the movable internal element includes at least: a motion release lever, a bimetallic element, a latch, a trigger, and a multi-link mechanism.

[0027] In the above embodiments, the movable parts that can move in both the open and closed states can be provided with magnetic conductors or permanent magnets, which can act as moving bodies. When subjected to the mutual magnetic force between the moving body and the fixed body, the attraction of the moving body is accelerated, so that the movable internal components can be powered up, thereby increasing the thrust and speed of the trip unit.

[0028] In some embodiments, the moving body is a first permanent magnet and / or a first magnetic conductive element and / or a movable internal element with magnetic conductivity, and the fixed body is a second permanent magnet and / or a second magnetic conductive element and / or a transient or permanent fixed element with magnetic conductivity.

[0029] In the above embodiments, the moving body is made of magnetically conductive material or permanent magnet material, which, together with the magnetically conductive material or permanent magnet material on the fixed body, attract each other to increase the thrust and speed of the trip unit.

[0030] In some embodiments, the magnetic poles of the first permanent magnet and the second permanent magnet are arranged opposite to each other, and the magnetic poles of the first permanent magnet and the second permanent magnet correspond to a first magnetic conductive element or a second magnetic conductive element or a movable internal element with magnetic conductivity or a transient or permanent fixing element with magnetic conductivity.

[0031] In the above embodiments, the permanent magnet and the magnetic conductor should be used in pairs. It can be a combination of permanent magnets or a combination of permanent magnets and magnetic conductors. When permanent magnets are combined with each other, they need to be paired with opposite polarities to generate attraction. When permanent magnets are paired with magnetic conductors, the magnetic poles of the permanent magnets need to face the magnetic conductors to generate attraction.

[0032] In some embodiments, the insulating housing is further provided with a reset assembly, which forcibly separates the first permanent magnet and / or the first magnetic conductor and the second permanent magnet and / or the second magnetic conductor that are attracted together.

[0033] In the above embodiments, when the permanent magnet and the permanent magnet or the permanent magnet and the magnetic conductor are attracted together after the tripping action, it will affect the re-closing operation. The two are forcibly separated by the reset component before the re-closing operation is performed.

[0034] In some embodiments, the reset assembly includes at least a reset button, the front end of which is provided with a push-out portion. Pressing the push-out portion of the reset button forcibly pushes open the first permanent magnet and / or the first magnetic conductive element and the second permanent magnet and / or the second magnetic conductive element that are attracted together.

[0035] In the above embodiments, the reset component includes at least a reset button, and the front end of the reset button is provided with a push-out part for forcibly pushing open the permanent magnet or magnetic conductor that are attracted together.

[0036] In some embodiments, the reset component is a partially meshable tooth provided between the operating handle and the motion trip lever. When the operating handle is closed, it drives the motion trip lever to rotate, forcibly separating the first permanent magnet and / or the first magnetic conductor that are attracted together from the second permanent magnet and / or the second magnetic conductor.

[0037] In the above embodiments, the function of the reset component can also be achieved by partially setting meshing gears between the operating handle and the motion release lever, so that the permanent magnet or magnetic conductor is forcibly separated by the closing motion of the operating handle driving the motion release lever.

[0038] The beneficial effects of this invention are as follows:

[0039] By setting fixed or moving bodies on transient or permanent fixed parts and movable internal components within the switch, and using permanent magnets and / or magnetic conductors in pairs, the mutual magnetic attraction between the two increases the tripping speed and tripping force of the trip unit. On the one hand, this improves the switch's operating speed and shortens the breaking time, effectively enhancing the switch's breaking capacity. On the other hand, the magnetic attraction between the permanent magnets and magnetic conductors increases the tripping force of the trip unit, effectively solving the problem of insufficient thrust of bimetallic components. Furthermore, it does not require reducing the tripping force of the operating mechanism; instead, it can increase the locking force of the operating mechanism. This significantly improves the switch's shock resistance and stability, broadening its application scenarios. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a diagram of the internal structure of the switch according to the first embodiment of the present invention;

[0042] Figure 2 This is a diagram of the internal structure of the switch according to the second embodiment of the present invention;

[0043] Figure 3 This is a diagram of the internal structure of the switch according to the third embodiment of the present invention;

[0044] Figure 4 This is a diagram of the internal structure of the switch according to the fourth embodiment of the present invention;

[0045] Figure 5 This is a diagram of the internal structure of the switch according to the fifth embodiment of the present invention;

[0046] Figure 6 This is a diagram of the internal structure of the switch according to the sixth embodiment of the present invention;

[0047] Figure 7 for Figure 6 Enlarged view of part of the image;

[0048] Figure 8This is a diagram of the internal structure of the switch according to the seventh embodiment of the present invention. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this invention. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this invention, and should not be construed as limiting the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0050] In the description of embodiments of this disclosure, the term "comprising" and similar terms should be understood as open-ended inclusion, i.e., "including but not limited to". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". The terms "first", "second", etc., may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0051] First Embodiment

[0052] Please refer to Figure 1 This invention provides an overload protection tripping device 200 for a switch. The overload protection tripping device 200 is disposed within the insulating housing 110 of the switch 100. The overload protection tripping device 200 includes a moving tripping rod 210, a first permanent magnet 301 and / or a first magnetic conductive element 401, a second permanent magnet 302 and / or a second magnetic conductive element 402, a thermal overload tripping device 220, a magnetic overload tripping device 230, and a latch 240. The first permanent magnet 301 and / or the first magnetic conductive element 402... Component 401 is disposed on the motion trip lever 210. The second permanent magnet 302 and / or the second magnetic conductive component 402 are disposed around the first permanent magnet 301 and / or the first magnetic conductive component 401 and fixed on a fixing member inside the switch. In this embodiment, the fixing member is the inner wall of the insulating shell of the switch. The motion trip lever 210 is rotatably disposed on a fixing post inside the insulating shell. The first permanent magnet 301 and / or the first magnetic conductive component 401 are disposed at the free end of the motion trip lever 210.

[0053] The motion release lever 210 drives the first permanent magnet 301 or / and the first magnetic conductor 401 to move closer to the second permanent magnet 302 or / and the second magnetic conductor 402, and the magnetic attraction between the first permanent magnet 301 or / and the first magnetic conductor 401 and the second permanent magnet 302 or / and the second magnetic conductor 402 increases accordingly.

[0054] The overload protection tripping device 200 is disposed inside the insulating housing 110 of the switch 100. The second permanent magnet 302 or the second magnetic conductor 402 is fixedly disposed inside the insulating housing 110. The magnetic poles of the first permanent magnet 301 and the second permanent magnet 302 are arranged opposite to each other, and their magnetic poles are arranged in opposite polarities.

[0055] In other embodiments, the first permanent magnet 301 is disposed corresponding to the second magnetic conductive element 402, with its magnetic poles facing the second magnetic conductive element 402; or the second permanent magnet 302 is disposed corresponding to the first magnetic conductive element 401, with its magnetic poles facing the first magnetic conductive element 401.

[0056] In some embodiments, the first magnetic conductive element 401 may be configured as a magnetic conductive element integrally formed with the motion release lever 210, or made of magnetic conductive material partially embedded in the motion release lever 210.

[0057] The overload tripping device 220 includes at least a bimetallic element 221. When the switch 100 experiences an overload current, the bimetallic element 221 heats up and bends. The heat and bending of the bimetallic element 221 pushes the motion tripping rod 210, and the motion tripping rod 210 triggers the latch 240, causing the switch 100 to trip and open.

[0058] The magnetic overload tripping device 230 includes at least an electromagnet 231 and a triggering part 232. When an overload short-circuit current occurs in the switch 100, the electromagnet 231 moves to drive the triggering part 232 to push the moving tripping rod 210, thereby triggering the latch 240 to trip and open the switch.

[0059] When the switch 100 is overloaded, the bimetallic element 221 or the trigger part 232 pushes the motion release lever 210 to cause the distance between the first permanent magnet 301 and the second permanent magnet 302, or the first permanent magnet 301 and the second magnetic conductor 402, or the first magnetic conductor 401 and the second permanent magnet 302 to gradually approach until they are attracted together, thereby increasing the force and speed at which the motion release lever 201 strikes the latch 240 and causing the switch 100 to quickly release.

[0060] In this application, permanent magnets and magnetic conductive parts need to be paired, or permanent magnets can be paired with each other and arranged with opposite polarities. The permanent magnets can be fixedly mounted on the insulating shell or the magnetic conductive parts can be fixedly mounted on the insulating shell to achieve the effect of providing attraction. The paired magnetic conductive parts or permanent magnets are mounted on the moving trip rod 210. When the moving trip rod 210 is triggered and pushed by the bimetallic element or trigger part on the overload protection trip device 200, the permanent magnets or magnetic conductive parts on the moving trip rod 210 gradually approach the magnetic conductive parts or permanent magnets on the insulating shell and generate a rapid attraction action to accelerate the tripping action and increase the tripping impact force.

[0061] Second Embodiment

[0062] Please refer to Figure 2 The present invention provides a second embodiment of an overload protection tripping device for a switch. The difference from the first embodiment is that the overload protection tripping device 200 further includes a fourth permanent magnet 304, and the latch 240 is made of a magnetically conductive material. The fourth permanent magnet 304 is fixedly disposed on the insulating housing 110, and the magnetic poles of the fourth permanent magnet 304 face the latch 240. When the moving tripping rod 210 is driven by the bimetallic element or trigger part on the overload protection tripping device 200 to push the latch 240 to trip, the latch 240 and the fourth permanent magnet 304 gradually approach each other and generate an attractive force, accelerating the tripping of the latch 240 and increasing the tripping speed of the switch.

[0063] In some embodiments, the latch 240 may also be provided with a third permanent magnet 303 or a third magnetic conductor 403, and a fourth permanent magnet 304 or a fourth magnetic conductor 404 may be provided on the insulating shell 110 on one side of the latch 240 to achieve the same effect. When the moving release lever 210 is triggered by the bimetallic element or trigger part on the overload protection release device 200, the moving release lever 210 impacts the latch 240, causing the permanent magnet or magnetic conductor on the latch 240 to gradually approach and rapidly attract with the magnetic conductor or permanent magnet on the insulating shell 110, thereby accelerating the release action and increasing the release impact force.

[0064] Third Embodiment

[0065] Please refer to Figure 3The present invention provides an overload protection tripping device for a switch according to a third embodiment. The difference from the first embodiment is that the overload protection tripping device 200 of the switch further includes a reset component. The reset component is disposed inside the insulating housing 110. The reset component is used to forcibly separate the first permanent magnet and / or the first magnetic conductor and the second permanent magnet and / or the second magnetic conductor that are attracted together. The insulating housing 110 is also provided with an operating mechanism 600. The operating mechanism 600 includes at least an operating handle 610 and a multi-link mechanism 620. The operating handle 610 and the moving tripping rod 210 are partially provided with teeth (611, 211) that can mesh with each other. When the operating handle 610 closes the circuit, it drives the moving tripping rod 210 to rotate, thereby forcibly separating the first permanent magnet and / or the first magnetic conductor and the second permanent magnet and / or the second magnetic conductor that are attracted together. When permanent magnets or permanent magnets and magnetic conductors become attracted together after a tripping action, it affects the subsequent closing operation and can easily cause the sliding contact to fail to close. A reset assembly forcibly separates the two components before attempting to close the circuit again. The reset assembly uses meshing teeth (611, 211) in parts of the operating handle 610 and the moving trip lever 210. The closing action of the operating handle 610 drives the moving trip lever 210 to forcibly separate the attracted permanent magnets or magnetic conductors, thereby improving the reliability of the closing operation.

[0066] Fourth embodiment

[0067] Please refer to Figure 4 This invention provides a fourth specific embodiment of an overload protection tripping device for a switch. The difference from the third embodiment is that the reset assembly includes at least a reset button 510. The front end of the reset button 510 has an ejector portion 511. Pressing the ejector portion 511 of the reset button 510 directly or indirectly forces the first permanent magnet and / or the first magnetic conductor and the second permanent magnet and / or the second magnetic conductor, which are attracted together. After the switch has tripped, the permanent magnets or the permanent magnet and the magnetic conductor are attracted together, which affects the re-closing operation. By pressing the reset button 510, the ejector portion 511 moves and touches the tripping lever 210 and / or the latch 240, forcibly separating the attracted permanent magnets or the permanent magnet and the magnetic conductor, thereby improving the reliability of the closing operation.

[0068] Fifth embodiment

[0069] Please refer to Figure 5This invention provides a fifth specific embodiment of an overload protection tripping device for a switch, wherein the magnetic overload tripping device 230 is a snap-fit ​​structure, but the principle is basically the same. The difference is that a movable U-shaped connecting rod 700 is added to the moving tripping rod 210. The other end of the U-shaped connecting rod 700 corresponds to the thermal overload tripping device 220, and a first magnetic conductive element 401 is inserted therethrough. A second permanent magnet 302 is fixedly disposed on the insulating shell 110 at a corresponding position on one side of the first magnetic conductive element 401. When the switch 100 is overloaded, the bimetallic element 221 or the trigger part 232 pushes the moving tripping rod 210 or / and the U-shaped connecting rod 700, causing the distance between the first magnetic conductive element 401 and the second permanent magnet 302 to gradually approach until they are attracted together, increasing the force and speed of the moving tripping rod 210 striking the latch 240 and causing the switch 100 to trip quickly.

[0070] Sixth Embodiment

[0071] Please refer to Figure 6 and Figure 7 This invention provides a sixth specific embodiment of an overload protection tripping device for a switch. Unlike the first embodiment, the switch is a multi-pole plastic case switch, the magnetic overload tripping device 230 is a snap-fit ​​structure, the thermal overload tripping device 220 and the magnetic overload tripping device 230 are integrally formed, the moving tripping rod 210 is provided with the first permanent magnet and / or the first magnetic conductive element, and the insulating shell 110 is provided with the second permanent magnet and / or the second magnetic conductive element. When the switch 100 is overloaded, the bimetallic element 221 or the trigger part 232 pushes the moving tripping rod 210 to cause the distance between the first permanent magnet and / or the first magnetic conductive element and the second permanent magnet and / or the second magnetic conductive element to gradually approach until they are attracted together, increasing the force and speed at which the moving tripping rod 210 releases the latch 240 and causes the switch 100 to trip quickly.

[0072] Seventh Embodiment

[0073] Please refer to Figure 8This invention provides an electrical switch according to a seventh specific embodiment, which differs from the fifth embodiment in that the moving contact 260 is provided with a fourth permanent magnet 306 and / or a fourth magnetic conductor 406. The moving contact 260 is a transient fixed part, which remains stationary after the electrical switch operating mechanism drives the moving contact to complete the closing. The fixed part can be a permanent magnet or a magnetic conductor. A moving part is provided on a movable part in front of the fixed part. The movable part is a multi-link mechanism 620, and the moving part is a fourth permanent magnet 305 and / or a fourth magnetic conductor 405. The configuration between the moving part and the fixed part... The relationship is as follows: permanent magnets correspond to permanent magnets, and permanent magnets correspond to magnetic conductors. Their positions can be interchanged at will. It should be noted that when permanent magnets correspond to permanent magnets, their magnetic poles must be opposite to generate attraction. When permanent magnets correspond to magnetic conductors, the magnetic poles of permanent magnets must correspond to those of magnetic conductors to generate attraction. When the switch 100 is overloaded, the bimetallic element 221 or the trigger part 232 pushes the motion release rod 210 or / and the U-shaped connecting rod 700, causing the distance between the moving body and the fixed body to gradually approach until they are attracted together. This increases the force and speed at which the motion release rod 210 of the release unit strikes the latch 240 and causes the switch 100 to quickly release.

[0074] This invention may be implemented in other specific forms without departing from its spirit and essential characteristics. The present embodiments are to be regarded in all respects as exemplary rather than limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and all modifications falling within the meaning of the claims and their equivalents are thus included within the scope of the invention.

Claims

1. An electrical switch comprising at least an insulating housing and internal components; said internal components comprising at least a thermal overload protection unit, an electromagnetic instantaneous protection unit, a trip unit, a movable contact, a stationary contact, an operating mechanism, characterized in that: The magnetically attractive magnet or / and permanent magnet is correspondingly arranged on at least two parts of the insulating shell or / and internal element, one of the correspondingly arranged magnetically attractive magnet or / and permanent magnet is a moving body, and the other is a fixed body; the magnetic attraction between the magnetically attractive magnet or / and permanent magnet drives at least one part of the tripping unit to move directly or indirectly to trip the switch.

2. An electric switch according to claim 1, characterised in that The fixed body is a transient fixed part or permanent fixed part arranged on the inner wall of the insulating shell or / and inside the insulating shell.

3. An electric switch according to claim 1, characterised in that The moving body is an active internal element arranged inside the insulating shell.

4. An electric switch according to claim 1, characterised in that The tripping unit at least includes a moving tripping rod and a lock; the thermal overload protection unit or / and electromagnetic instantaneous protection unit directly or indirectly causes the moving body to gradually approach the fixed body, so that the magnetic attraction between them increases, the force and speed of the moving tripping rod triggering the lock to trip increase, and the moving contact and the static contact are quickly separated.

5. An electric switch according to claim 1, characterised in that The operating mechanism at least includes an operating handle, a contact indicating part, and a multi-link mechanism; the operating handle drives the multi-link mechanism to bring the moving contact and the static contact into electrical connection or disconnection; the thermal overload protection unit or / and electromagnetic instantaneous protection unit directly or indirectly causes the moving body to gradually approach the fixed body, so that the magnetic attraction between them increases, the force and speed of the moving tripping rod triggering the lock to trip increase, the balance of the multi-link mechanism is broken, the moving contact and the static contact are quickly separated, and the contact indicating part is used to indicate the closing and opening states of the moving contact.

6. An electric switch according to claim 1, characterised in that The thermal overload protection unit at least includes a bimetallic element; when an overload current occurs in the switch, the bimetallic element generates heat and bends to push the moving tripping rod, directly or indirectly causes the moving body to gradually approach the fixed body, the magnetic attraction between the moving body and the fixed body increases, the force and speed of the moving tripping rod triggering the lock to trip increase, and the switch is quickly opened.

7. An electric switch according to claim 1, characterised in that The electromagnetic instantaneous protection unit at least includes an electromagnet and a triggering part; when a large overload current or a short-circuit current occurs in the switch, the electromagnet is attracted to drive the triggering part to push the moving tripping rod, directly or indirectly causes the moving body to gradually approach the fixed body, the magnetic attraction between the moving body and the fixed body increases, the force and speed of the moving tripping rod triggering the lock to trip increase, and the switch is quickly opened.

8. An electric switch according to claim 2, characterised in that The transient fixed part is a part that can remain stationary in the closing state of the switch operating mechanism and can move in the opening state, and the permanent fixed part is a part that cannot move in any state.

9. An electric switch according to claim 3, characterised in that The active part is a part that can move in both the closing state and the opening state of the switch operating mechanism.

10. An electric switch according to claim 8, characterised in that The transient fixed part at least includes a moving contact and a contact indicating part, and the permanent fixed part at least includes an insulating shell and other parts fixedly arranged on the insulating shell.

11. An electric switch according to claim 9, characterised in that The active internal element at least includes a moving tripping rod, a bimetallic element, a lock, a triggering part, and a multi-link mechanism.

12. An electric switch according to claim 1, characterised in that The moving body is a first permanent magnet or / and a first magnetically permeable part or / and an active internal element with magnetic permeability, and the fixed body is a second permanent magnet or / and a second magnetically permeable part or / and a transient fixed part or a permanent fixed part with magnetic permeability.

13. An electric switch according to claim 12, characterised in that The magnetic poles of the first and second permanent magnets are arranged in opposite correspondence, and the magnetic poles of the first and second permanent magnets correspond to the first or second magnetic conductive member, or the movable internal element with magnetic conductivity, or the temporary fixed element with magnetic conductivity, or the permanent fixed element.

14. An electric switch according to claim 13, characterised in that The insulating shell is also provided with a reset assembly, which forcibly separates the first permanent magnet or / and the first magnetic conductive member and the second permanent magnet or / and the second magnetic conductive member that are attracted together.

15. An electric switch according to claim 14, characterised in that The reset assembly at least includes a reset button, and the front end of the reset button is provided with an ejection part. Pressing the ejection part of the reset button forcibly ejects the first permanent magnet or / and the first magnetic conductive member and the second permanent magnet or / and the second magnetic conductive member that are attracted together.

16. An electric switch according to claim 14, characterised in that The operating handle and the movement trip lever are partially provided with teeth that can interlock with each other. When the operating handle is operated to close the switch, the movement trip lever is driven to rotate, so as to forcibly separate the first permanent magnet or / and the first magnetic conductive member and the second permanent magnet or / and the second magnetic conductive member that are attracted together.

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