Switching unit of switching device and switching device

Abstract

The utility model relates to the field of switching devices, in particular to a switching unit of a switching device and the switching device, the switching unit comprises a movable contact part, a static contact part and an arc extinguishing assembly, the movable contact part is arranged on an action execution assembly, the arc extinguishing assembly is linked with the action execution assembly, and the arc extinguishing assembly is linked with the action execution assembly along with closing or breaking of the movable contact part and the static contact part. The arc isolating part of the arc extinguishing assembly is selectively positioned at the avoiding position or the arc extinguishing position, so that the arc isolating part forms physical isolation of the movable contact part and the static contact part at the arc extinguishing position to extinguish the arc; the arc extinguishing assembly and the action execution assembly form linkage through a tooth-shaped transmission mechanism. The switching device is provided with the switching unit. The arc extinguishing assembly and the action execution assembly are linked to enable the arc isolating part to move along with the movement of the action execution assembly, effective arc extinguishing can be realized, timely abdication can be realized to facilitate reliable closing of the movable contact part and the static contact part, the tooth-shaped transmission mechanism works reliably, the working reliability of the arc extinguishing assembly is improved, and the service life of the arc extinguishing assembly is prolonged. And the switch unit is ensured to have a good arc extinguishing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of switch electrical appliances, in particular to a switch unit of a switch electrical appliance and the switch electrical appliance. Background Art

[0002] Switching devices refer to the switching devices in the terms and definitions in GB / T 5226.1-2019 / IEC 60204-1:2016, that is, devices used to connect or disconnect the current of one or several circuits. Their specific components can be circuit breakers, relays, disconnectors, etc. Switching devices such as disconnectors and circuit breakers are generally provided with arc extinguishing structures to extinguish the arc generated during the disconnection of the moving and static contacts. In the prior art, there is a method of using movable insulating arc-isolating parts to physically isolate the moving and static contacts to achieve the arc-extinguishing function. Specifically, when the moving and static contacts are closed, the arc-isolating parts move to one side of the closing point of the moving and static contacts; when the moving and static contacts are disconnected, the arc-isolating parts move between the moving and static contacts to extinguish the arc. Chinese patent document CN217061990U proposes a method of forcibly isolating arcs in a circuit breaker by using an arc isolating member, which indirectly forms a matching relationship with the moving contact through the contact support, and moves to a evasive position as the moving contact contacts the static contact, so as to facilitate the reliable closure of the moving and static contacts; when the moving contact moves away from the static contact, the arc isolating member is reset to the arc isolating position under the action of a spring. The arc isolation of this structure relies on the reset of an elastic member, which will fail or reduce its elastic force after long-term use, resulting in poor reset reliability, resulting in insufficient arc extinguishing effect of the circuit breaker. Summary of the invention

[0003] The utility model aims to provide a switch unit of a switch electrical appliance and a switch electrical appliance, which form a linkage relationship between an arc extinguishing structure and a moving contact part, optimize the arc extinguishing structure, and improve the arc extinguishing reliability of the switch electrical appliance.

[0004] To achieve the above purpose, the technical solution of the utility model includes:

[0005] A switch unit of a switching electrical appliance, the switch unit comprising a moving contact, a stationary contact and an arc extinguishing assembly, the moving contact being arranged in an action executing assembly, the moving contact being moved by the action executing assembly to close or disconnect with the stationary contact, the arc extinguishing assembly being linked to the action executing assembly, the arc extinguishing assembly being provided with an arc isolation portion, as the moving contact is closed or disconnected with the stationary contact, the arc isolation portion of the arc extinguishing assembly can be selectively located in an avoidance position or an arc extinguishing position, so that the arc isolation portion forms a physical isolation barrier between the moving contact and the stationary contact at the arc extinguishing position to extinguish the arc; the arc extinguishing assembly and the action executing assembly are linked via a toothed transmission mechanism.

[0006] In one embodiment, the action execution component is a rotating component, including a turntable member, and the moving contact part rotates under the drive of the turntable member to close or disconnect the moving contact part and the static contact part; the turntable member is provided with a first transmission tooth structure, and the arc extinguishing component is provided with a second transmission tooth structure, and the first transmission tooth structure cooperates with the second transmission tooth structure to form the tooth-shaped transmission mechanism, and the arc isolation part switches between the avoidance position and the arc extinguishing position under the drive of the second transmission tooth structure.

[0007] In one embodiment, the first transmission tooth structure is a structure having at least a portion of an external gear and is arranged on the outside of the turntable member, and the second transmission tooth structure is any one of a straight rack structure, an arc-shaped internal rack structure, and a gear structure including at least a portion of external teeth.

[0008] In one embodiment, the moving contact portion and a portion of the first transmission tooth structure are arranged at intervals along the axial direction of the turntable member, and the arc extinguishing assembly also includes an arc isolation member, and the arc isolation member includes an arc isolation shaft and a plurality of meshing teeth arranged outside the arc isolation shaft, at least a portion of the meshing teeth form the second transmission tooth structure, so that the second transmission tooth structure is formed as a gear structure; at least one of the meshing teeth extends axially along the turntable member to separate the moving contact portion from the static contact portion to achieve arc extinguishing, so that the meshing tooth used to separate the moving contact portion from the static contact portion forms the arc isolation portion.

[0009] In one embodiment, the outer side of the turntable member is provided with an engaging tooth for forming the first transmission tooth structure, and the engaging tooth forming the arc isolation portion is also used to form a tooth transmission cooperation with at least one of the engaging teeth, so that the engaging tooth and the arc isolation portion cooperate to form the physical isolation barrier.

[0010] In one embodiment, the arc-isolating member is further provided with a plurality of arc-pressing portions, and the arc-pressing portions are arranged adjacent to the arc-isolating portions along the circumference of the arc-isolating shaft. The plurality of arc-pressing portions are arranged at intervals along the axial direction of the arc-isolating shaft, and grooves for accommodating the moving contact portions are formed between adjacent arc-pressing portions.

[0011] In one embodiment, at least one edge of the arc pressing portion is provided with the meshing teeth.

[0012] In one embodiment, the arc isolation member is further provided with a blade portion, and the blade portion is arranged along the circumference of the arc isolation shaft and is located on a side of the arc isolation shaft away from the moving contact portion.

[0013] In one embodiment, the arc extinguishing assembly also includes an arc isolation member, which includes an arc isolation cover. The arc isolation cover is a cover-shaped structure used to surround the static contact part, and a portion of the arc isolation cover forms the arc isolation part. The arc isolation member also includes an arc isolation shaft and a transmission plate arranged outside the arc isolation shaft, and a plurality of meshing teeth are provided on the edge of the transmission plate. The meshing teeth form the second transmission tooth structure, so that the second transmission tooth structure is formed into a gear structure.

[0014] In one embodiment, it also includes a base, and the arc-isolating member is rotatably arranged on the base through the arc-isolating shaft, and the arc-isolating cover also includes a first connecting portion and a second connecting portion connected to the arc-isolating shaft, the first connecting portion is a sheet-like structure extending along the axial direction and the radial direction of the arc-isolating shaft respectively, and the second connecting portion is a sheet-like structure extending along the radial direction and the circumferential direction of the arc-isolating shaft respectively, and the second connecting portion is located at one end of the arc-isolating shaft close to the base, and in the radial direction of the arc-isolating shaft, the arc-isolating portion is respectively connected to the outer edges of the first connecting portion and the second connecting portion, so that the arc-isolating cover forms the cover-shaped structure with the opening facing away from the base.

[0015] In one embodiment, a reinforcement portion is provided on a surface of the first connecting portion facing the stationary contact portion.

[0016] In one embodiment, the turntable member is rotatably arranged on the base, and an arc-blocking portion extending radially thereof is provided at one end of the turntable member close to the base, and the arc-blocking portion is located between the base and the arc-isolating cover. The position of the arc-blocking portion in the circumferential direction of the turntable member is such that when the arc-isolating portion is in the arc extinguishing position, the arc-blocking portion is located between the moving contact portion and the static contact portion.

[0017] In one embodiment, the arc extinguishing assembly also includes an arc isolation member of a plate-like structure, and a plurality of meshing teeth are provided on a surface of the arc isolation member facing the first transmission tooth structure. The meshing teeth form the second transmission tooth structure, and the part of the arc isolation member corresponding to the moving contact portion forms the arc isolation portion.

[0018] In one embodiment, the arc isolation member is an arc-shaped plate-shaped structure or a flat plate-shaped structure, so that the second transmission tooth structure is correspondingly formed into an arc-shaped inner rack structure or a straight rack structure.

[0019] In one embodiment, the moving contact portion and a portion of the first transmission tooth structure are arranged at intervals along the axial direction of the turntable member, and in the axial direction of the turntable member, the meshing teeth extend along the arc isolation member portion, so that the arc isolation portion and the second transmission tooth structure correspond to the moving contact portion and the first transmission tooth structure in the axial direction of the turntable member, respectively.

[0020] In one embodiment, the action execution component is provided with two moving contact parts, and the two moving contact parts are arranged opposite to each other on the radial sides of the turntable member, so that the two moving contact parts move synchronously under the drive of the turntable member, and the number of the static contact parts is two, and the two static contact parts are arranged corresponding to the moving contact parts, thereby forming two groups of contact groups, and each group of the contact groups is correspondingly provided with a group of arc extinguishing components.

[0021] In one embodiment, the switch unit also includes a base, the arc extinguishing assembly is arranged on the base, the surface of the base where the arc extinguishing assembly is arranged is provided with a first isolation structure, and the arc extinguishing assembly is provided with a second isolation structure, when the arc extinguishing assembly is located at the arc extinguishing position, the first isolation structure cooperates with the second isolation structure to form an isolation structure, and the first isolation structure and the second isolation structure partially overlap in the direction of the base toward the arc extinguishing assembly.

[0022] In one embodiment, the first isolation structure is a guide plate extending along a movement path of at least a portion of the arc isolation portion, and the second isolation structure is disposed at an edge of the arc isolation portion facing the base.

[0023] In one embodiment, the movement speed of the arc extinguishing assembly is twice the movement speed of the action execution assembly, so that during the movement of the moving contact toward disconnection from the static contact, the arc isolation portion cooperates with the guide plate to form a physical isolation barrier.

[0024] The technical solution of the utility model also includes:

[0025] A switch electrical appliance comprises the above-mentioned switch unit.

[0026] In one embodiment, the switching device is a circuit breaker or a disconnect switch.

[0027] The beneficial effects of the utility model are:

[0028] 1. The arc extinguishing component and the toothed transmission mechanism of the action execution component form a linkage, so that the arc isolation part of the arc extinguishing component switches between the avoidance position and the arc extinguishing position with the movement of the action execution component, and can move to the arc extinguishing position in time to form a physical isolation barrier to achieve effective arc extinguishing when the moving contact part and the static contact part are disconnected, and can also move to the avoidance position in time when the moving contact part and the static contact part are closed to facilitate the reliable closure of the two. The toothed transmission mechanism works reliably, which improves the working reliability of the arc extinguishing component and ensures that the switch unit has a good arc extinguishing effect.

[0029] 2. The action execution component forms a toothed transmission mechanism by cooperating with the second transmission tooth structure through the external gear arranged on the turntable member, and the second transmission tooth structure can selectively adopt any one of a straight rack structure, an arc-shaped internal rack structure, and a gear structure including at least a portion of external teeth. Therefore, different second transmission tooth structures can be selected according to different needs, making the structure of the arc extinguishing component more diversified to meet various needs of the switch unit.

[0030] 3. The arc-isolating member is also provided with an arc-suppressing portion, and adjacent arc-suppressing portions can form a groove for accommodating the moving contact portion, so that the arc-suppressing portion is placed on both sides of the moving contact portion to compress the arc generated on both sides of the moving contact portion when the moving contact portion moves away from the static contact portion, which is beneficial to extinguishing the arc and improving the reliability of arc isolation.

[0031] 4. The isolation structure between the base and the arc extinguishing assembly can fill the gap between the two, reduce the possibility of free electrons moving in the gap, and further improve the reliability of arc isolation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a three-dimensional diagram of the contact disconnected state of Example 1 of the utility model.

[0033] Figure 2 It is an exploded view of embodiment 1 of the present utility model.

[0034] Figure 3 It is a front view of the contact closed state of Example 1 of the utility model.

[0035] Figure 4 It is a front view of the moving contact part of the first embodiment of the utility model during its movement.

[0036] Figure 5 It is a front view of the contact disconnected state of Example 1 of the utility model.

[0037] Figure 6 It is a three-dimensional diagram of the arc isolation member of Example 1 of the utility model.

[0038] Figure 7 It is a three-dimensional diagram of the action execution component of Example 1 of the utility model.

[0039] Figure 8 It is a three-dimensional diagram of the arc isolation member of Example 2 of the utility model.

[0040] Fig. 9 It is a three-dimensional diagram of the contact disconnected state of Example 2 of the present utility model.

[0041] Fig.10 This is a stereoscopic diagram of the contact disconnection state of Example 2 of the utility model from another perspective.

[0042] Fig.11It is a front view of the contact closed state of embodiment 2 of the present utility model.

[0043] Fig.12 It is a front view of the moving contact part of the second embodiment of the utility model during its movement.

[0044] Fig.13 It is a front view of the contact disconnected state of Example 2 of the present utility model.

[0045] Fig.14 It is a three-dimensional diagram of the contact disconnected state of Example 3 of the present utility model.

[0046] Fig.15 It is a three-dimensional diagram of the arc isolation member of Example 3 of the utility model.

[0047] Fig.16 It is an exploded view of embodiment 3 of the present utility model.

[0048] Fig.17 It is a front view of the contact closed state of embodiment 3 of the present utility model.

[0049] Fig.18 It is a front view of the contact disconnected state of Example 3 of the utility model.

[0050] Fig.19 It is a three-dimensional diagram of the arc isolation member of Example 4 of the utility model.

[0051] Fig. 20 It is a three-dimensional diagram of the contact disconnected state of Example 4 of the present utility model.

[0052] Fig.21 It is a front view of the contact closed state of embodiment 4 of the present utility model.

[0053] Fig. 22 It is a front view of the contact disconnected state of embodiment 4 of the present utility model.

[0054] Fig.23 It is a stereogram of embodiment 5 of the present utility model.

[0055] Wherein: 1 moving contact part, 2 static contact part, 20 terminal, 3 arc extinguishing assembly, 31 arc isolation part, 32 second transmission tooth structure, 33 second isolation structure, 4 action execution assembly, 40 turntable part, 41 first transmission tooth structure, 42 meshing teeth, 42-1 first part meshing teeth, 42-2 second part meshing teeth, 42-3 third part meshing teeth, 43 arc blocking part, 5 arc isolation part, 50 arc isolation cover, 51 arc isolation shaft, 52 meshing teeth, 53 arc pressing part, 54 blade part, 55 transmission plate, 56 first connecting part, 57 second connecting part, 58 reinforcement part, 6 base, 61 limiting part, 62 first isolation structure, 620 guide plate. DETAILED DESCRIPTION

[0056] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0057] Example 1

[0058] See also Figures 1 to 5 As shown, the utility model discloses a switch unit of a switch electrical appliance, the switch unit comprises a moving contact part 1, a stationary contact part 2 and an arc extinguishing assembly 3, the moving contact part 1 is arranged on an action execution assembly 4, the moving contact part 1, the stationary contact part 2, the arc extinguishing assembly 3 and the action execution assembly 4 are respectively arranged on a base 6, the base 6 cooperates with an upper cover arranged thereon to form a contact cavity for accommodating the moving contact part 1, the stationary contact part 2, the arc extinguishing assembly 3 and the action execution assembly 4. The end of the stationary contact part 2 extends outward from the contact cavity to form a wiring terminal. The moving contact part 1 moves under the drive of the action execution assembly 4 and closes or disconnects with the stationary contact part 2, the arc extinguishing assembly 3 is linked to the action execution assembly 4, and the arc extinguishing assembly 3 is provided with an arc isolating part 31, as the moving contact part 1 and the stationary contact part 2 are closed or disconnected, the arc isolating part 31 of the arc extinguishing assembly 3 can be selectively located at an avoidance position or an arc extinguishing position, so that the arc isolating part 31 forms a physical isolation between the moving contact part 1 and the stationary contact part 2 at the arc extinguishing position to extinguish the arc.

[0059] Referring to FIG3 , when the moving contact part 1 and the stationary contact part 2 are closed, the arc-isolating part 31 is located on one side of the closing point, so that the moving contact part 1 and the stationary contact part 2 can be reliably closed. At this time, the arc-isolating part 31 is located at an avoidance position.

[0060] See also Figure 5 As shown, when the moving contact part 1 and the stationary contact part 2 are disconnected, the arc isolation part 31 is located between the moving contact part 1 and the stationary contact part 2 and forms a physical isolation barrier therebetween, so as to isolate the arc generated when the moving contact part 1 and the stationary contact part 2 are disconnected to form an effective arc extinguishing. At this time, the position of the arc isolation part 31 is the arc extinguishing position.

[0061] The arc extinguishing component 3 and the action execution component 4 are linked by the toothed transmission mechanism, so the arc extinguishing component 3 can move with the movement of the action execution component 4, closely connecting the actions of the arc isolation part 31 and the moving contact part 1, improving the synchronization of the actions of the two, and making the switching timing of the arc isolation part 31 between the avoidance position and the arc extinguishing position more accurate. In addition, the transmission accuracy and efficiency of the toothed transmission mechanism are high. Whether the arc isolation part 31 is from the avoidance position to the arc extinguishing position or from the arc extinguishing position to the avoidance position, it is transmitted by the toothed transmission mechanism, and the transmission is more reliable, thereby improving the working reliability of the arc extinguishing component and ensuring that the switch unit has a good arc extinguishing effect.

[0062] See also Figures 1 to 7 As shown, the moving contact part 1 of this example is closed or disconnected with the static contact part 2 by rotating, so the action execution component 4 is linked with the arc extinguishing component 3 by forming a toothed transmission mechanism through gears. Among them, the gear does not only refer to a complete external gear or internal gear, but also an incomplete gear (external gear or internal gear) with only a part of the transmission teeth formed by multiple meshing teeth arranged along an arc, and the gear is not limited to any one of a spur gear, a helical gear, a bevel gear and a turbine. In other embodiments, the moving contact part 1 can also be closed or disconnected with the static contact part 2 by linear motion, so the action execution component 4 can be provided with a rack to link with the arc extinguishing component 3.

[0063] The action execution component 4 is a rotating component, which includes a turntable member 40, which is rotatably arranged on the base 6, and the moving contact part 1 is inserted on the turntable member 40, so that the moving contact part 1 rotates under the drive of the turntable member 40 to close or disconnect the moving contact part 1 and the static contact part 2. The turntable member 40 is provided with a first transmission tooth structure 41, and the arc extinguishing component 3 is provided with a second transmission tooth structure 32. The first transmission tooth structure 41 cooperates with the first transmission tooth structure 32 to form a tooth-shaped transmission mechanism, and the arc isolation part 31 switches between the avoidance position and the arc extinguishing position under the drive of the second transmission tooth structure 32. More specifically, a plurality of meshing teeth 42 are provided on the outer side of the turntable member 40, and some of the meshing teeth form the first transmission tooth structure 41, so the first transmission tooth structure 41 is a partial external gear structure arranged on the outer side of the turntable member 40. Accordingly, the second transmission tooth structure 32 can be any one of a straight rack structure, an arcuate internal rack structure, and a gear structure including at least a portion of external teeth to form a transmission match with the first transmission tooth structure 41 of a partial external gear structure.

[0064] The moving contact part 1 of this example is arranged on both sides of the radial direction of the rotating disk member 40, and the moving contact part 1 extends along the radial direction of the rotating disk member 40, and the moving contact part 1 and the first transmission tooth structure 41 are arranged axially spaced from each other along the rotating disk member 40. The arc extinguishing assembly 3 also includes an arc-isolating member 5, and the arc-isolating member 5 includes an arc-isolating shaft 51 and a plurality of meshing teeth 52 arranged outside the arc-isolating shaft 51. The arc-isolating member 5 is arranged on the base 6 by rotating the arc-isolating shaft 51, and the meshing teeth 52 form a second transmission tooth structure 32, so that the second transmission tooth structure 32 of this example is formed as a partial external gear structure with a portion of external teeth. At least one meshing tooth 52 extends axially along the rotating disk member 40 to separate the moving contact part 1 from the stationary contact part 2 to achieve arc extinguishing, so that the meshing teeth 52 used to separate the moving contact part 1 from the stationary contact part 2 form the arc-isolating part 31. As the turntable 40 rotates, the arc-isolating member 5 rotates under the action of the meshing teeth 52, and the arc-isolating portion 31 gradually enters between the moving contact portion 1 and the stationary contact portion 2 to form a physical isolation between the two, so as to extinguish the arc between the two. In this example, the number of meshing teeth 52 forming the arc-isolating portion 31 is two. If there is a residual arc in the first meshing tooth 52, the second meshing tooth 52 can supplement and cut off the arc, further improving the reliability of arc extinguishing. In other embodiments, it is also feasible to set only one or more than two meshing teeth 52 to form the arc-isolating portion 1, and both can achieve a certain arc extinguishing effect. Accordingly, there should be the same number of meshing teeth 42 as the meshing teeth 52 to cooperate with it.

[0065] The arc-isolating portion 31 of this example is formed by meshing teeth 52, and the meshing teeth 52 forming the arc-isolating portion 31 also form a toothed transmission with the bite teeth 42 to link the arc-extinguishing component 3 and the action execution component 4, so the meshing teeth 52 forming the arc-isolating portion 31 integrate the arc-isolating function and the transmission function, making full use of the structure of the arc-isolating member 5, which is conducive to a more compact structure of the switch unit. In addition, due to the meshing of the meshing teeth 52 and the bite teeth 42, the meshing meshing teeth 52 and the bite teeth 42 together form a physical isolation barrier for arc isolation, increasing the thickness and arc isolation performance of the physical isolation barrier; in other embodiments, it is also feasible to rely solely on the arc-isolating portion 31 to form a physical isolation barrier, but it should be noted that the thickness of the arc-isolating portion 31 is sufficient to extinguish the arc, and the arc-isolating portion 31 at this time does not participate in the toothed transmission that links the arc-extinguishing component 3 and the action execution component 4, and the arc-isolating portion 31 is not limited to the structure of the meshing teeth 52.

[0066] The arc-isolating member 5 is also provided with a plurality of arc-pressing portions 53, which are arranged adjacent to the arc-isolating portion 31 along the circumference of the arc-isolating rotating shaft 51, and the plurality of arc-pressing portions 53 are arranged at intervals along the axial direction of the arc-isolating rotating shaft 51, and a groove for accommodating the moving contact portion 1 is formed between adjacent arc-pressing portions 53. In the process of the moving contact portion 1 moving from the position closed with the static contact portion 2 to the position away from the static contact portion 2, the arc-isolating member 5 moves accordingly under the action of the toothed transmission mechanism, so that the moving contact portion 1 and the arc-pressing portion 53 have relative movement, and the adjacent arc-pressing portions 53 can form a groove for accommodating the moving contact portion 1, and the groove can form a moving yielding structure of the moving contact portion 1. In addition, during this movement process, the arc-pressing portions 53 located on both sides of the moving contact portion 1 have a compression effect on the arc generated between the moving contact portion 1 and the static contact portion 2, which helps the subsequent arc-isolating portion 31 to intervene to extinguish the arc, further improving the effect and reliability of arc extinguishing.

[0067] The moving contact part 1 in this example is a structure of two spaced-apart plate members, so three arc pressing parts 53 are provided, and the three arc pressing parts 53 are spaced-apart arranged on both sides of the moving contact part 1 along the axial direction of the rotating disk member 40 .

[0068] The extension length of the engaging teeth 42 forming the first transmission tooth structure 41 in the axial direction of the turntable member 40 is not limited to a certain length. The first part of the engaging teeth 42-1 in this example is arranged at intervals with the moving contact part 1 in the axial direction of the turntable member 40 without overlapping. Such an arrangement can make full use of the limited space in the axial direction of the turntable member 40, making the overall layout of the action execution component 4 more compact. In order to cooperate with the arc isolation part 31 to fully separate the moving contact part 1 and the static contact part 2 or to increase the transmission strength, the second part of the engaging teeth 42-2 has a certain overlap with the moving contact part 1 in the axial direction of the turntable member 40. More specifically, the second part of the engaging teeth 42-2 is completely extended in the axial direction of the outer periphery of the turntable member 40. The third part of the engaging teeth 42-3 is disconnected in the middle of the axial direction of the turntable member 40 to form the movement of the arc pressing part 53. At least one arc-pressing portion 53 has an edge provided with meshing teeth 52, and the meshing teeth 52 are arranged correspondingly to the biting teeth 42, so as to realize smooth transmission of the rotating disk member 40 and the arc-isolating member 5. Therefore, in this example, the meshing teeth 52 are arranged on the complete edge of one of the arc-pressing portions 53, and the meshing teeth 52 are arranged only on part of the edges of the other two arc-pressing portions 53.

[0069] The arc-isolating member 5 is further provided with a blade portion 54, which is arranged along the circumference of the arc-isolating shaft 51 and is located on the side of the arc-isolating shaft 51 away from the moving contact portion 1. During the rotation of the arc-isolating member 5, the blade portion 54 can effectively speed up the airflow velocity, which is beneficial to reducing the arc temperature, and blows away the free arc, accelerating the elimination of the free arc, thereby increasing the service life of the product.

[0070] The action execution component 4 of this example is provided with two moving contact parts 1, and the two moving contact parts 1 are oppositely arranged on the radial sides of the rotating disk member 40, so that the two moving contact parts 1 move synchronously under the drive of the rotating disk member 40, and there are two static contact parts 2, and the two static contact parts 2 are arranged correspondingly to the moving contact part 1, thereby forming two groups of contact groups, and each group of contact groups is correspondingly provided with a group of arc extinguishing components 3. In other embodiments, it is also feasible to set only one group of contact groups or to set more than two groups of contact groups, and the specific number and arrangement method are determined by those skilled in the art according to the content disclosed by the utility model and product requirements.

[0071] The workflow of this utility model is as follows:

[0072] See also Figure 3 As shown, when the moving contact part 1 and the stationary contact part 2 are closed, the arc isolation part 31 is located in the avoidance position, forming two plate-like structures of the moving contact part 1 respectively located on both sides of the stationary contact part 2 and forming point contact with the stationary contact part 2. At this time, the moving contact part 1 and the stationary contact part 2 form a reliable closure.

[0073] See also Figures 3 to 5 As shown, when the moving contact part 1 and the stationary contact part 2 need to be disconnected, the moving contact part 1 rotates around the rotating axis of the rotating disk 40. Figure 3 and Figure 4 The arc-isolating member 5 rotates in the counterclockwise direction as indicated by the arrow, and the arc-isolating member 5 rotates in the clockwise direction synchronously around the arc-isolating rotating shaft 51. During the rotation process, the moving contact 1 passes through the groove between the adjacent arc-pressing portions 53, and the arc-pressing portions 53 compress the arc between the moving contact 1 and the stationary contact 2. As the arc-isolating member 5 continues to rotate, the partial meshing teeth 52 of the arc-isolating portion 31 mesh with the biting teeth 42 to form a physical isolation barrier between the moving contact 1 and the stationary contact 2, thereby achieving arc extinguishing of the switch unit. Until the moving contact 1 contacts the limiting portion 61 on the base 6 and stops, and during the entire rotation process of the arc-isolating member 5, the blade portion 54 accelerates the airflow velocity, which is conducive to eliminating the free arc and improving the arc extinguishing effect.

[0074] Example 2

[0075] The difference between this example and the first embodiment is that the structure of the arc isolation member 5 is different, and the first transmission tooth structure 41 outside the rotating disk member 40 is also different. The details are as follows:

[0076] See also Figures 8 to 13As shown, the arc-isolating member 5 is provided with an arc-isolating cover 50, which is a cover-shaped structure for surrounding the stationary contact part 2, and a part of the arc-isolating cover 50 forms the arc-isolating part 31; the moving contact part 1 and the first transmission tooth structure 41 are arranged in an axial direction of the rotating disk member 40. The arc-isolating member 5 also includes an arc-isolating rotating shaft 51 and a transmission plate 55 arranged outside the arc-isolating rotating shaft 51, and the edge of the transmission plate 55 is provided with a plurality of meshing teeth 52, and the meshing teeth 52 form the second transmission tooth structure 32, so that the second transmission tooth structure 32 is formed into a gear structure, more specifically, an incomplete gear structure with a part of external teeth. As the arc-isolating member 5 rotates, the arc-isolating part 31 rotates around the arc-isolating rotating shaft 51, so as to move between the avoidance position and the arc-extinguishing position, and the cover-shaped structure of the arc-isolating cover 50 isolates the stationary contact part 2 more fully, thereby improving the arc-isolating effect between the moving contact part 1 and the stationary contact part 2, and thus improving the reliability of arc-extinguishing.

[0077] The arc-isolating member 5 further includes a first connecting portion 56 and a second connecting portion 57 connected to the arc-isolating shaft 51. The first connecting portion 56 is a sheet-like structure extending in the axial direction and radial direction of the arc-isolating shaft 51, respectively. The second connecting portion 57 is a sheet-like structure extending in the radial direction and circumferential direction of the arc-isolating shaft 51, respectively. The second connecting portion 57 is located at one end of the arc-isolating shaft 51 close to the base 6. In the radial direction of the arc-isolating shaft 51, the arc-isolating portion 31 is connected to the outer edges of the first connecting portion 56 and the second connecting portion 57, respectively, so that the arc-isolating cover 50 forms a cover-shaped structure with an opening facing away from the base 6. The first connecting portion 56 mainly plays the role of connecting the arc-isolating shaft 51 and the arc-isolating portion 31. In addition to playing the role of connecting the arc-isolating shaft 51 and the arc-isolating portion 31 together with the first connecting portion 56, the second connecting portion 57 can also increase the strength of the arc-isolating cover 50, that is, the arc-isolating shaft 51 and the arc-isolating portion 31 can also be connected without the second connecting portion 57. Secondly, since the second connecting portion 57 is located at the end of the arc isolation shaft 51 close to the base 6, it can form an isolation barrier between the base 6 and the arc isolation portion 31 to prevent the free arc from moving in the gap between the base 6 and the arc isolation portion 31 and reducing the arc extinguishing effect.

[0078] A reinforcing portion 58 is provided on the surface of the first connecting portion 56 facing the static contact portion 2. The reinforcing portion 58 is a structure of multiple reinforcing ribs arranged at intervals, which supports the first connecting portion 56, thereby increasing the strength of the arc isolation member 5, preventing the arc isolation member 5 from deforming, and ensuring that the static contact portion 2 is reliably surrounded, thereby further ensuring the arc isolation effect.

[0079] An arc blocking portion 43 extending in the radial direction is provided at one end of the rotary disc 40 close to the base 6. The arc blocking portion 43 is located between the base 6 and the arc shield 50. The arc blocking portion 43 is located in the circumferential direction of the rotary disc 40 so that when the arc shield 31 is in the arc extinguishing position, the arc blocking portion 43 is located between the moving contact portion 1 and the stationary contact portion 2. Since the arc shield 50 is provided with meshing teeth 52 on the side facing the base 6, there is a certain gap between the second connecting portion 57 of the arc shield 50 and the base 6. When the moving contact portion 1 and the stationary contact portion 2 are disconnected, the free arc may pass through the gap and the opening of the arc shield 50 and contact the stationary contact portion 2. The existence of the arc blocking portion 43 can fill the gap to a certain extent, thereby reducing the activity space of the free arc toward the stationary contact 2, and further improving the reliability of arc extinguishing. Preferably, when the arc isolation portion 31 is in the arc extinguishing position, the length of the arc blocking portion 43 extending in the circumferential direction of the turntable member 40 is connected or approximately connected to the guide plate 620 on the base, wherein approximately connected includes partial overlap of the two or a small gap between the two, so that the guide plate 620 and the arc isolation portion 31 are disconnected to fill the gap between the second connecting portion 57 and the base 6, further reducing the possibility of the free arc passing through the gap and the opening of the arc isolation cover 50 to contact the static contact portion 2, thereby improving the reliability of arc extinguishing.

[0080] See also Fig. 9 As shown, the surface of the base 6 on which the arc extinguishing component 3 is arranged is provided with a first isolation structure 62, and the arc extinguishing component 3 is provided with a second isolation structure 33. When the arc extinguishing component 33 is located at the arc extinguishing position, the first isolation structure 62 cooperates with the second isolation structure 33 to form an isolation structure, and the first isolation structure 62 and the second isolation structure 33 partially overlap in the direction of the base 6 toward the arc extinguishing component 3, so that the isolation structure can fill the gap between the arc extinguishing component 3 and the base 6, reduce the possibility of free electrons moving in the gap, and further improve the reliability of arc isolation.

[0081] In this example, the first isolation structure 62 is formed by a guide plate 620 on the base 6, and the guide plate 620 extends along the movement path of the arc extinguishing component 3. The second isolation structure 33 is arranged on the edge of the arc extinguishing component 3 facing the base 6. In this example, the second isolation structure 33 is formed on the outer side surface of the arc-shaped arc-isolating portion 31 of the arc-isolating member 5, and more specifically, the second isolation structure 33 is formed on the bottom of the outer side surface of the arc-isolating portion 31. Therefore, the first isolation structure 62 can also form a movement guide structure of the arc-isolating member 5.

[0082] The guide plate 620 is an incomplete extension on the movement path of the arc extinguishing assembly 3 to prevent the guide plate from interfering with the movement of the action execution assembly 4. The incomplete extension of the guide plate 620 causes a certain gap to exist between the second connecting portion 57 of the arc shield 50 and the base 6 in the extension direction of the guide plate 620. The arc blocking portion 43 can fill the gap to a certain extent, thereby cooperating with the guide plate 620 to reduce the activity space of the free arc toward the static contact 2, and further improve the reliability of arc extinguishing.

[0083] In this example, the guide plate 620 and the arc blocking portion 43 work together to reduce the possibility of the free arc moving between the second connecting portion 57 and the base 6. However, either the guide plate 620 or the arc blocking portion 43 alone can also play a role in blocking the free arc. Therefore, in other embodiments, it is also feasible to rely solely on the guide plate 620 or the arc blocking portion 43 to block the free arc.

[0084] The movement speed of the arc extinguishing component 3 is twice that of the movement speed of the action execution component 4. Therefore, when the moving contact part 1 does not reach the disconnecting position during the movement from the closed state to the disconnected state, the arc isolation part 31 cooperates with the guide plate 620 to form a physical isolation barrier during the movement of the moving contact part 1 toward disconnection from the static contact part 2. In this example, when the turntable 40 rotates 30° with the moving contact part 1, the arc isolation part 31 begins to cooperate with the guide plate to form a physical isolation barrier. The action execution component 4 and the arc extinguishing component 3 achieve a relationship of twice the movement speed of the two through the transmission ratio of the toothed transmission mechanism between the two being 2:1, so that when the moving contact part 1 rotates a smaller angle, the arc isolation part 31 can enter between the moving contact part 1 and the static contact part 2 and start to play an arc isolation role, thereby reducing the duration of the arc. The length of the guide plate 620 forming the first isolation structure 62 extending on the movement path of the arc isolation member 5 is such that when the moving contact rotates by 30°, the arc isolation member 5 moves to the position of the guide plate. At this time, the arc isolation portion 31 cooperates with the guide plate 620 to form an isolation barrier between the moving contact portion 1 and the static contact portion 2 to extinguish the arc; thereby, the arc can be cut off when the moving contact portion 1 moves at a small angle. Under the same rated current, the arc burning time is shorter, the arc burning energy is lower, and the arc extinguishing effect is better.

[0085] The workflow of this utility model is as follows:

[0086] See also Fig.11 As shown, when the moving contact part 1 and the stationary contact part 2 are closed, the arc isolation part 31 is located in the avoidance position, forming two plate-like structures of the moving contact part 1 respectively located on both sides of the stationary contact part 2 and forming point contact with the stationary contact part 2. At this time, the moving contact part 1 and the stationary contact part 2 form a reliable closure.

[0087] See also Figures 11 to 13 As shown, when the moving contact part 1 and the stationary contact part 2 need to be disconnected, the moving contact part 1 rotates around the rotating axis of the rotating disk 40. Fig.11 and Fig.12 The arc-isolating member 5 rotates in the counterclockwise direction as indicated by the arrow, and the arc-isolating member 5 rotates in the clockwise direction synchronously around the arc-isolating rotating shaft 51, and the arc-isolating portion 31 gradually moves between the moving contact portion 1 and the stationary contact portion 2. When the moving contact portion 1 rotates 30°, the arc-isolating portion 31 cooperates with the guide plate, and at this time, a physical isolation barrier has been formed between the moving contact portion 1 and the stationary contact portion 2 to extinguish the arc; as the arc-isolating member 5 continues to rotate, it continues to rotate in the extension direction of the guide plate until the arc-isolating portion 31 contacts the side wall of the base 6 and stops. The arc-isolating cover 50 of the arc-isolating member 5 surrounds the outside of the stationary contact portion 2 to form an isolation barrier between the stationary contact portion 2 and the moving contact portion 1, and the moving contact portion 1 and the stationary contact portion 2 are disconnected.

[0088] Example 3

[0089] The difference between this embodiment and the first embodiment lies in that the structure of the arc isolation member 5 is different, and the first transmission tooth structure 41 outside the rotating disk member 40 is also different.

[0090] See also Figures 14 to 18 As shown, in the engaging teeth 42 arranged outside the turntable member 40, the first part of the engaging teeth 42-1 is incompletely extended in the axial direction of the turntable member 40 in order to make way for the moving contact part 1, so that the first part of the engaging teeth 42-1 and the moving contact part 1 are spaced apart in the axial direction of the turntable member 40, and the second part of the engaging teeth 42-2 is a full-tooth structure that is fully extended along the axial direction of the turntable member 40, which can increase the strength of the engaging teeth 42 while ensuring transmission.

[0091] The arc-isolating member 5 of this example is a plate-like structure, more specifically, an arc-shaped plate-like structure. A plurality of meshing teeth 52 are provided on the surface of one side of the arc-isolating member 5 facing the first transmission tooth structure 41. The meshing teeth 52 form the second transmission tooth structure 32, so that the second transmission tooth structure 32 of this example is a rack structure, more specifically, an arc-shaped rack structure. In the axial direction of the rotating disk member 40, the meshing teeth 52 extend along a portion of the arc-isolating member 5, and the portion of the arc-isolating member 5 corresponding to the moving contact portion 1 forms the arc-isolating portion 31. The meshing teeth 52 of this example are partially arranged in the arc-shaped extension direction of the arc-isolating member 5, so as to form a yield to the moving contact portion 1 on the basis of reliable transmission.

[0092] The meshing teeth 52 of this example extend partially along the arc isolation member 5 in the axial direction of the turntable member 40. In other embodiments, if there is sufficient space, the meshing teeth 52 can be fully extended or extend to between the arc isolation portion 31 and the moving contact portion 1, thereby increasing the thickness of the arc isolation portion 31 and enhancing the arc extinguishing capability.

[0093] Similar to Example 2, this example also provides a first isolation structure 62 and a second isolation structure 33 to cooperate to form an isolation structure, and the isolation structure partially overlaps in the direction of the base 6 toward the arc extinguishing component 3, so that the isolation structure can fill the gap between the arc extinguishing component 3 and the base 6, reduce the possibility of free electrons moving in the gap, and further improve the reliability of arc isolation.

[0094] Regarding the isolation structure, the difference from Example 2 is: Figure 15 to Figure 16 As shown, the first isolation structure 62 is formed by two spaced guide plates 620 extending along the motion path of the arc extinguishing assembly 3, so that a guide groove for accommodating a portion of the arc isolation member 5 is formed between the two guide plates, and the edge of the arc isolation member 5 facing the base 6 forms the second isolation structure 33. The first isolation structure 62 and the second isolation structure 33 of this example form a plug-in fit, which can not only form a motion guide for the arc isolation member 5, but also effectively reduce the gap through which the free arc can pass, reduce the probability of arc reignition, and further improve the arc extinguishing ability.

[0095] The workflow of this utility model is as follows:

[0096] See also Fig.17 As shown, when the moving contact part 1 and the stationary contact part 2 are closed, the arc isolation part 31 is located in the avoidance position, forming two plate-like structures of the moving contact part 1 respectively located on both sides of the stationary contact part 2 and forming point contact with the stationary contact part 2. At this time, the moving contact part 1 and the stationary contact part 2 form a reliable closure.

[0097] See also Figure 17 to Figure 18 As shown, when the moving contact part 1 and the stationary contact part 2 need to be disconnected, the moving contact part 1 rotates around the rotating axis of the rotating disk 40. Fig.17 The arc-isolating member 5 rotates counterclockwise as indicated by the arrow, and synchronously moves along the extension direction of the rack, and the arc-isolating portion 31 gradually moves toward between the moving contact portion 1 and the stationary contact portion 2 until the arc-isolating member 5 contacts the side wall of the base 6. At this time, the moving contact portion 1 also reaches the maximum opening position, and the arc-isolating member 5 is completely isolated.

[0098] Example 4

[0099] See also Figures 19 to 22 As shown, this example is basically the same as Example 3, the only difference being that the arc isolation member 5 in this example is a flat plate structure, and the corresponding second transmission tooth structure 32 is a straight rack structure. In addition, the extension direction of the first isolation structure 62 also corresponds to the extension direction of the arc isolation member 5, and is a straight extension.

[0100] The meshing teeth 52 of this example are completely arranged in the straight extension direction of the arc isolation member 5 to form a tooth-shaped transmission with the meshing teeth, thereby achieving reliable transmission.

[0101] The other undescribed parts of this example are the same as those in Example 3 and will not be described again here.

[0102] Example 5

[0103] See also Fig.23 As shown, the utility model further discloses a switch electrical appliance, which includes a switch unit of any one of the above-mentioned embodiments 1 to 4. Further, the switch electrical appliance is a circuit breaker or an isolating switch. Fig.23 The switch electrical device shown is an isolating switch, and the end of the static contact part 2 extends to the outside of the housing of the isolating switch to form a connection terminal 20.

[0104] Although the present invention is specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that the remaining undescribed portions are prior art, and that various changes made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims shall fall within the scope of protection of the present invention.

Claims

1. A switch unit of a switch electrical appliance, the switch unit comprising a moving contact, a stationary contact and an arc extinguishing assembly, wherein the moving contact is arranged in an action execution assembly, and the moving contact is driven by the action execution assembly to close or disconnect with the stationary contact, characterized in that: The arc extinguishing component is linked to the action execution component, and the arc extinguishing component is provided with an arc isolation part. As the moving contact part and the static contact part are closed or disconnected, the arc isolation part of the arc extinguishing component can be selectively located at an avoidance position or an arc extinguishing position, so that the arc isolation part forms a physical isolation barrier between the moving contact part and the static contact part at the arc extinguishing position to extinguish the arc; the arc extinguishing component and the action execution component are linked through a toothed transmission mechanism.

2. A switch unit of a switch device according to claim 1, characterized in that: The action execution component is a rotating component, including a turntable component, and the moving contact part rotates under the drive of the turntable component to close or disconnect the moving contact part and the static contact part; the turntable component is provided with a first transmission tooth structure, and the arc extinguishing component is provided with a second transmission tooth structure, and the first transmission tooth structure cooperates with the second transmission tooth structure to form the tooth-shaped transmission mechanism, and the arc isolation part switches between the avoidance position and the arc extinguishing position under the drive of the second transmission tooth structure.

3. The switch unit of a switch device according to claim 2, characterized in that: The first transmission tooth structure is a structure having at least a portion of an external gear and arranged outside the turntable, and the second transmission tooth structure is any one of a spur rack structure, an arcuate internal rack structure, and a gear structure including at least a portion of external teeth.

4. The switch unit of a switch device according to claim 3, characterized in that: The moving contact part and a part of the first transmission tooth structure are arranged at intervals along the axial direction of the turntable member, and the arc extinguishing assembly also includes an arc isolation member, which includes an arc isolation shaft and a plurality of meshing teeth arranged outside the arc isolation shaft, at least a part of the meshing teeth form the second transmission tooth structure, so that the second transmission tooth structure is formed into a gear structure; at least one of the meshing teeth extends axially along the turntable member to separate the moving contact part from the static contact part to achieve arc extinguishing, so that the meshing tooth used to separate the moving contact part from the static contact part forms the arc isolation part.

5. The switch unit of a switch device according to claim 4, characterized in that: The outer side of the rotating disk is provided with meshing teeth for forming the first transmission tooth structure, and the meshing teeth forming the arc isolation portion are also used to form a tooth transmission cooperation with at least one of the meshing teeth, so that the meshing teeth cooperate with the arc isolation portion to form the physical isolation barrier; and / or The arc-isolating member is further provided with a plurality of arc-pressing portions, which are arranged adjacent to the arc-isolating portions along the circumference of the arc-isolating shaft, and the plurality of arc-pressing portions are arranged at intervals along the axial direction of the arc-isolating shaft, and grooves for accommodating the moving contact portions are formed between adjacent arc-pressing portions.

6. The switch unit of a switch device according to claim 4, characterized in that: The arc isolation member is further provided with a blade portion, and the blade portion is arranged along the circumference of the arc isolation shaft and is located on a side of the arc isolation shaft away from the moving contact portion.

7. The switch unit of a switch device according to claim 3, characterized in that: The arc extinguishing assembly also includes an arc isolation member, which includes an arc isolation cover. The arc isolation cover is a cover-shaped structure used to surround the static contact part, and a portion of the arc isolation cover forms the arc isolation part. The arc isolation member also includes an arc isolation shaft and a transmission plate arranged outside the arc isolation shaft. The edge of the transmission plate is provided with a plurality of meshing teeth, and the meshing teeth form the second transmission tooth structure, so that the second transmission tooth structure is formed into a gear structure.

8. The switch unit of a switch device according to claim 7, characterized in that: It also includes a base, and the arc-isolating member is rotatably arranged on the base through the arc-isolating shaft. The arc-isolating cover also includes a first connecting part and a second connecting part connected to the arc-isolating shaft. The first connecting part is a sheet-like structure extending along the axial direction and radial direction of the arc-isolating shaft respectively, and the second connecting part is a sheet-like structure extending along the radial direction and circumferential direction of the arc-isolating shaft respectively, and the second connecting part is located at one end of the arc-isolating shaft close to the base, and in the radial direction of the arc-isolating shaft, the arc-isolating part is respectively connected to the outer edges of the first connecting part and the second connecting part, so that the arc-isolating cover forms the cover-shaped structure with the opening facing away from the base.

9. A switch unit of a switch device according to claim 8, characterized in that: The turntable member is rotatably arranged on the base, and an arc-blocking portion extending radially thereof is provided at one end of the turntable member close to the base, and the arc-blocking portion is located between the base and the arc-isolating cover. The arc-blocking portion is positioned in the circumferential direction of the turntable member so that when the arc-isolating portion is in the arc-extinguishing position, the arc-blocking portion is located between the moving contact portion and the static contact portion.

10. The switch unit of a switch device according to claim 3, characterized in that: The arc extinguishing assembly also includes an arc-isolating member of a plate-like structure, a surface of the arc-isolating member on one side facing the first transmission tooth structure is provided with a plurality of meshing teeth, the meshing teeth form the second transmission tooth structure, and a portion of the arc-isolating member corresponding to the moving contact portion forms the arc-isolating portion.

11. A switch unit of a switch device according to claim 10, characterized in that: The arc isolation member is an arc-shaped plate-shaped structure or a flat plate-shaped structure, so that the second transmission tooth structure is correspondingly formed into an arc-shaped inner rack structure or a straight rack structure; and / or The moving contact portion and a portion of the first transmission tooth structure are arranged at intervals along the axial direction of the turntable member, and in the axial direction of the turntable member, the meshing teeth extend along the arc isolation member portion, so that the arc isolation portion and the second transmission tooth structure correspond to the moving contact portion and the first transmission tooth structure in the axial direction of the turntable member respectively.

12. The switch unit of a switch device according to claim 1, characterized in that: The switch unit also includes a base, the arc extinguishing assembly is arranged on the base, the surface of the base where the arc extinguishing assembly is arranged is provided with a first isolation structure, and the arc extinguishing assembly is provided with a second isolation structure, when the arc extinguishing assembly is located at the arc extinguishing position, the first isolation structure cooperates with the second isolation structure to form an isolation structure, and the first isolation structure and the second isolation structure partially overlap in the direction of the base toward the arc extinguishing assembly.

13. A switch unit of a switch device according to claim 12, characterized in that: The first isolation structure is a guide plate extending along at least a portion of a moving path of the arc isolation portion, and the second isolation structure is disposed at an edge of the arc isolation portion facing the base.

14. A switch unit of a switch device according to claim 13, characterized in that: The movement speed of the arc extinguishing component is twice the movement speed of the action execution component, so that during the movement of the moving contact part toward disconnection from the static contact part, the arc isolation part cooperates with the guide plate to form a physical isolation barrier.

15. A switch electrical device, characterized in that: A switch unit comprising any one of claims 1-14.

16. A switch device according to claim 15, characterized in that: The switch device is a circuit breaker or an isolating switch.

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