CN219832500U - Contact assembly, contact unit and isolating switch - Google Patents

Abstract

A contact assembly, a contact unit and an isolating switch relate to the technical field of piezoelectric devices. The contact assembly comprises a moving contact and two fixed contacts; the two fixed contacts are distributed at the opposite ends of the moving contact, the moving contact is driven to rotate, and the opposite ends of the moving contact can be respectively contacted with the two fixed contacts to switch on the isolating switch or respectively separated from the two fixed contacts to switch off the isolating switch; when the moving contact rotates between the opening position and the closing position, the sweeping area of the moving contact is not overlapped with the projection of at least one of the two fixed contacts in the direction of the rotating axis of the moving contact. The contact assembly can improve the breaking speed of the isolating switch.

Description

Contact assembly, contact unit and isolating switch

Technical Field

The utility model relates to the technical field of piezoelectric devices, in particular to a contact assembly, a contact unit and an isolating switch.

Background

With the vigorous development of the photovoltaic industry, the demand for the intellectualization of photovoltaic inverters is increasing. When a photovoltaic circuit fails, the isolating switch, as a key component with a breaking function, must divide the circuit in a shortest time to protect other components. When the isolating switch is at the opening position, an insulation distance meeting the specified requirement and an obvious disconnection mark are arranged between the contacts; when in the closing position, the current under normal loop conditions and the current under abnormal conditions (such as short circuit) within a specified time can be carried.

The isolating switch commonly used at present has rotary isolating switch and direct-acting isolating switch, wherein, rotary isolating switch includes handle, operating device and contact unit, and wherein, contact unit includes the casing and sets up the contact subassembly in the casing, and the contact subassembly includes the contact support, set up the moving contact on the contact support and be located two static contacts of contact support both sides, operating device drives the contact support rotation, the contact support can drive the moving contact rotation in order to contact or separate with the static contact to realize switch-on or keep apart the function of conductive loop. The conventional contact assembly is usually connected in a plug-in manner by matching the moving contact and the fixed contact, however, when the isolating switch needs to be opened, the contact form needs to overcome larger friction force between the moving contact and the fixed contact, and the rotating speed of the moving contact can be influenced when the isolating switch is opened, so that the breaking speed of the isolating switch is reduced, and the requirement of a user on high breaking speed is difficult to meet.

Disclosure of Invention

The utility model aims to provide a contact assembly, a contact unit and a disconnecting switch, which can improve the breaking speed of the disconnecting switch.

Embodiments of the present utility model are implemented as follows:

in one aspect of the utility model, a contact assembly is provided, the contact assembly comprising a moving contact and two stationary contacts; the two fixed contacts are distributed at the opposite ends of the moving contact, the moving contact is driven to rotate, and the opposite ends of the moving contact can be respectively contacted with the two fixed contacts to switch on the isolating switch or respectively separated from the two fixed contacts to switch off the isolating switch; when the moving contact rotates between the opening position and the closing position, the sweeping area of the moving contact is not overlapped with the projection of at least one of the two fixed contacts in the direction of the rotating axis of the moving contact. The contact assembly can improve the breaking speed of the isolating switch.

Optionally, when the moving contact is in the closing position, the orthographic projection of at least one of the two fixed contacts in the first direction is at least partially overlapped with the moving contact; when the moving contact is in a closing position, the first direction is the width direction of the moving contact.

Optionally, at least one end of the moving contact is provided with a first clapping surface, and the fixed contact corresponding to the first clapping surface is provided with a second clapping surface; the first clapping surface is matched with the second clapping surface, so that when the moving contact is in a closing position, the first clapping surface and the second clapping surface are arranged in opposite directions and are in clapping contact with each other.

Optionally, the two opposite ends of the moving contact are provided with a first clapping surface, and the two fixed contacts are provided with a second clapping surface; the first clapping surfaces are matched with the second clapping surfaces, so that when the moving contact is in a closing position, the two first clapping surfaces and the two second clapping surfaces are in one-to-one corresponding clapping contact.

Optionally, a first clapping surface is arranged at one end of the moving contact, and a contact part is arranged at the other end of the moving contact; the fixed contact corresponding to the first clapping surface is provided with a second clapping surface, and the fixed contact corresponding to the contact part is provided with a matching part; the first clapping surface is matched with the second clapping surface, so that when the moving contact is in a closing position, the first clapping surface and the second clapping surface are arranged in opposite directions and are in clapping contact with each other, and the contact part is connected with the matching part in a plug-in mode.

Optionally, the first clapping surface and the second clapping surface are respectively arranged at an included angle with the rotating plane of the moving contact; and/or the first clapping surface and the second clapping surface are respectively arranged at an included angle with the plane where the pin of the fixed contact is positioned.

Optionally, the pins of the fixed contact are used for being connected with external components through screws or welded; when the pins of the two fixed contacts are connected with the external part through welding, the pins of the two fixed contacts extend to the same side of the shell of the contact unit in the same direction.

Optionally, a surface of the moving contact, which is used for being matched with the fixed contact, is a convex surface.

In another aspect of the utility model, a contact unit is provided that includes a housing and the contact assembly described above disposed within the housing.

In still another aspect of the present utility model, there is provided a disconnecting switch, which includes a plurality of contact units as described above that are stacked, and further includes an operating mechanism and a handle connected to the operating mechanism, where the handle drives a moving contact to rotate through the operating mechanism so as to contact with or separate from a fixed contact.

The beneficial effects of the utility model include:

the contact assembly provided by the utility model comprises a moving contact and two fixed contacts; the two fixed contacts are distributed at the opposite ends of the moving contact, the moving contact is driven to rotate, and the opposite ends of the moving contact can be respectively contacted with the two fixed contacts to switch on the isolating switch or respectively separated from the two fixed contacts to switch off the isolating switch; when the moving contact rotates between the opening position and the closing position, the sweeping area of the moving contact is not overlapped with the projection of at least one of the two fixed contacts in the direction of the rotating axis of the moving contact. When the movable contact of the contact assembly rotates between the opening position and the closing position, as the sweeping area of the movable contact is not overlapped with at least one fixed contact, the movable contact is in non-plug connection with at least one fixed contact, and compared with the prior art that both ends of the movable contact are in plug connection with two fixed contacts, the utility model does not need to overcome or can reduce larger friction force between the movable contact and the fixed contacts when the isolating switch needs to be opened. Therefore, the utility model does not influence the rotating speed of the moving contact when the isolating switch is opened, or can reduce the influence on the rotating speed of the moving contact, thereby improving the breaking speed of the isolating switch.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a contact assembly according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a second embodiment of a contact assembly;

FIG. 3 is a third schematic view of a contact assembly according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a contact assembly according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a contact assembly according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a contact unit according to an embodiment of the present utility model;

fig. 7 is a schematic structural diagram of an isolating switch according to an embodiment of the present utility model;

fig. 8 is a schematic structural diagram of a moving contact according to an embodiment of the present utility model.

Icon: a 100-contact unit; 10-a moving contact; 11-a first beating surface; 12-contact part; 121-a first plug-in piece; 122-a second plug-in piece; 123-first gap; 20-a fixed contact; 21-a second beating surface; 22-mating part; 221-a first mating piece; 30-contact support; 40-a housing; a-a first direction; 50-silver points; 200-an operating mechanism; 300-handle; c-a first plane; d-a second plane; alpha-first included angle.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 and 2, the present embodiment provides a contact assembly, which includes a moving contact 10 and two fixed contacts 20; the two fixed contacts 20 are distributed at the opposite ends of the moving contact 10, the moving contact 10 is driven to rotate, and the opposite ends of the moving contact 10 can be respectively contacted with the two fixed contacts 20 to switch on the isolating switch or respectively separated from the two fixed contacts 20 to switch off the isolating switch; when the moving contact 10 rotates between the opening position and the closing position, the sweep area of the moving contact 10 does not overlap with the projection of at least one of the two fixed contacts 20 in the rotation axis direction of the moving contact 10. The contact assembly can improve the breaking speed of the isolating switch.

It should be noted that the contact assembly is a double-break contact assembly, wherein the contact assembly includes a moving contact 10 and two fixed contacts 20 disposed at opposite ends of the moving contact 10, as shown in fig. 1 and 2.

In this embodiment, the contact assembly may further comprise a contact support 30, wherein in one possible implementation, the contact support 30 comprises an upper support and a lower support distributed up and down. The movable contact 10 is limited and fixed between the upper supporting piece and the lower supporting piece, and the upper supporting piece and the lower supporting piece are mutually buckled to fix the movable contact 10 between the upper supporting piece and the lower supporting piece; in another possible embodiment, the contact support 30 may also be a component, and the contact support 30 has a cavity therein for receiving and retaining the moving contact 10.

When the isolating switch needs to be switched off or switched on, the moving contact 10 is enabled to rotate through the supporting rotation of the driving contact, and the two opposite ends of the moving contact 10 can be respectively contacted with the two fixed contacts 20 to switch on the isolating switch; alternatively, the opposite ends of the moving contact 10 may be separated from the two fixed contacts 20, respectively, to open the isolating switch.

In this embodiment, when the moving contact 10 rotates between the opening position and the closing position, as shown in fig. 2 and 4, at least one of the sweeping area of the moving contact 10 and the two fixed contacts 20 has no overlapping area. The sweep area is an area swept by the moving contact 10 when the moving contact rotates between the opening position and the closing position, as shown by the dashed line area in fig. 2 and 4.

The fact that the sweeping area of the moving contact 10 and the fixed contact 20 do not overlap means that when the moving contact 10 moves between the opening position and the closing position, the projection of the moving area in the thickness direction of the moving contact 10 does not coincide with the fixed contact 20, so that the moving contact 10 does not rotate to the inside of the fixed contact 20 or above or below the fixed contact 20 when rotating. In this way, the contact between the moving contact 10 and the fixed contact 20 is not plug-in type, but two faces are in clapping contact.

The fact that the sweeping area of the moving contact 10 does not overlap with at least one of the two fixed contacts 20 means that the moving contact 10 and the at least one fixed contact 20 are connected in a non-pluggable mode, and two surfaces are in contact.

Specifically, one skilled in the art can select one of the moving contacts 10 to connect with one of the fixed contacts 20 in a plug-in manner and one of the moving contacts to connect with the other fixed contact 20 in a non-plug-in manner according to the requirements; alternatively, the two opposite ends of the moving contact 10 may be connected with the two fixed contacts 20 in a non-pluggable manner.

The movable contact 10 and at least one fixed contact 20 are connected in a non-pluggable manner, so that when the isolating switch needs to be disconnected, compared with a contact assembly adopting pluggable connection in the prior art, the utility model can avoid or reduce larger friction force between the movable contact 10 and the fixed contact 20, and therefore, the utility model can improve the speed of the movable contact 10 in rotation during disconnection to a certain extent, and can improve the disconnection speed of the isolating switch, so as to meet the requirement of a user on high disconnection speed.

In summary, the contact assembly provided by the utility model includes a moving contact 10 and two fixed contacts 20; the two fixed contacts 20 are distributed at the opposite ends of the moving contact 10, the moving contact 10 is driven to rotate, and the opposite ends of the moving contact 10 can be respectively contacted with the two fixed contacts 20 to switch on the isolating switch or respectively separated from the two fixed contacts 20 to switch off the isolating switch; when the moving contact 10 rotates between the opening position and the closing position, the sweep area of the moving contact 10 does not overlap with the projection of at least one of the two fixed contacts 20 in the rotation axis direction of the moving contact 10. When the moving contact 10 of the contact assembly provided by the utility model rotates between the opening position and the closing position, as the sweeping area of the moving contact 10 is not overlapped with at least one fixed contact 20, the moving contact 10 is in non-pluggable connection with at least one fixed contact 20, and compared with the prior art that both ends of the moving contact 10 are in pluggable connection with the two fixed contacts 20, when the isolating switch needs to be opened, the large friction force between the moving contact 10 and the fixed contacts 20 is not needed to be overcome or can be reduced. Therefore, the utility model does not influence the rotation speed of the moving contact 10 when the isolating switch is opened, or can reduce the influence on the rotation speed of the moving contact 10, thereby improving the breaking speed of the isolating switch.

Optionally, when the moving contact 10 is in the closing position, the orthographic projection of at least one of the two fixed contacts 20 in the first direction a and the moving contact 10 have at least partial overlap; when the moving contact 10 is in the closing position, the first direction a is the width direction of the moving contact 10.

The first direction a is a width direction of the moving contact 10, as shown in fig. 2 and 4.

The orthographic projection of at least one of the two stationary contacts 20 in the first direction a and the moving contact 10 have at least partial overlap. Specifically, the front projection of the fixed contact 20 (i.e., the fixed contact 20 that does not overlap with the sweep area of the moving contact 10) in the first direction a and the moving contact 10 that are in contact and clap connection have at least partial overlap. In this way, the movable contact 10 and the side edge of the fixed contact 20 can be ensured to be in contact and clapped.

Referring to fig. 1 to 4, optionally, at least one end of the moving contact 10 is provided with a first clapping surface 11, and the fixed contact 20 corresponding to the first clapping surface 11 is provided with a second clapping surface 21; the first clapping surface 11 is matched with the second clapping surface 21, so that when the moving contact 10 is in a closing position, the first clapping surface 11 and the second clapping surface 21 are arranged opposite to each other and are in clapping contact with each other.

That is, at least one end of the moving contact 10 is in clapping contact connection with the fixed contact 20, which means that the moving contact 10 may have one end in clapping contact connection with one fixed contact 20 and the other end in plug connection with the other fixed contact 20, as shown in fig. 1 and 2; the two ends of the moving contact 10 may be respectively connected with the two fixed contacts 20 in a clapping contact manner.

For example, in one possible embodiment, as shown in fig. 2, the moving contact 10 is connected to the left fixed contact 20 in a plug-in manner, and is connected to the right fixed contact 20 in a snap-in manner in fig. 2. Of course, fig. 2 is only an example, and the contact modes of the moving contact 10 and the two fixed contacts 20 may be interchanged, that is, the moving contact 10 may be connected to the right fixed contact 20 in a plug-in manner, and may be connected to the left fixed contact 20 in a clap-in manner.

In another possible embodiment, as shown in fig. 3, 4 and 5, two opposite ends of the moving contact 10 are provided with a first clapping surface 11, and two fixed contacts 20 are provided with a second clapping surface 21; the first clapping surfaces 11 are matched with the second clapping surfaces 21, so that when the moving contact 10 is in a closing position, the two first clapping surfaces 11 and the two second clapping surfaces 21 are in one-to-one corresponding clapping contact.

Namely, the opposite ends of the moving contact 10 are respectively connected with the two fixed contacts 20 in a clapping type contact manner. Thus, compared with one-side clapping type contact connection, one-side plugging connection is more labor-saving, and the effect of improving the breaking speed is better.

When one end of the moving contact 10 is in clapping contact connection with one fixed contact 20 and the other end of the moving contact is in plug connection with the other fixed contact 20, in this embodiment, as shown in fig. 1, a first clapping surface 11 is arranged at one end of the moving contact 10, and a contact portion 12 is arranged at the other end; the fixed contact 20 corresponding to the first beating surface 11 has a second beating surface 21, and the fixed contact 20 corresponding to the contact portion 12 has an engaging portion 22; the first clapping surface 11 is matched with the second clapping surface 21, so that when the moving contact 10 is in a closing position, the first clapping surface 11 and the second clapping surface 21 are arranged opposite to each other and are in clapping contact with each other, and the contact part 12 is connected with the matching part 22 in a plug-in mode.

The connection between the contact portion 12 and the mating portion 22 includes the following two cases:

in the first case, referring to fig. 1 and 2, the contact portion 12 is provided with a first insertion tab 121 and a second insertion tab 122, one ends of the first insertion tab 121 and the second insertion tab 122 near the rotation center of the movable contact 10 are connected to each other, and the other ends are separated to form a first gap 123; the fitting portion 22 has a first fitting piece 221; when the moving contact 10 is in the closing position, the first matching piece 221 is inserted into the first gap 123, and two opposite sides of the first matching piece are respectively connected with the first inserting piece 121 and the second inserting piece 122 in a contact manner.

That is, the moving contact 10 has a first insertion piece 121 and a second insertion piece 122, and the fixed contact 20 has a corresponding first mating piece 221, so that when the moving contact 10 rotates to the closing position, the first mating piece 221 can be inserted into a first gap 123 between the first insertion piece 121 and the second insertion piece 122 of the moving contact 10, as shown in fig. 1 and 2.

In the second case, the mating portion 22 is provided with a first insertion piece 121 and a second insertion piece 122, and one ends of the first insertion piece 121 and the second insertion piece 122, which are away from the moving contact 10, are connected to each other, and the other ends thereof are separated to form a second gap; the contact portion 12 has a second mating tab; when the moving contact 10 is in the closing position, the second matching piece is inserted into the second gap, and two opposite sides of the second matching piece are respectively in contact connection with the first inserting piece 121 and the second inserting piece 122.

The principle of the mode is the same as that of the first mode, the difference is only that the setting positions of the inserting piece and the matching piece are exchanged, and the specific details of the second situation can be clearly known by the person skilled in the art according to the text description of the first situation and the corresponding drawings, so the utility model is not repeated.

In this embodiment, the first clapping surface 11 and the second clapping surface 21 are disposed at an included angle with the rotation plane of the moving contact 10.

For example, the first clapping surface 11 and the rotating plane of the moving contact 10 may be perpendicular to each other or may form a certain included angle, and the second clapping surface 21 and the rotating plane of the moving contact 10 may be perpendicular to each other or may form a certain included angle.

In this embodiment, the first clapping surface 11 and the second clapping surface 21 are respectively disposed at an included angle with a plane where the pins of the fixed contact 20 are located.

For example, the planes of the first clapping surface 11 and the pins of the fixed contact 20 may be perpendicular to each other or may be disposed at a certain included angle, and the planes of the second clapping surface 21 and the pins of the fixed contact 20 may be perpendicular to each other or may be disposed at a certain included angle.

It should be noted that, taking an example that the first clapping surface 11 and the plane where the pin of the fixed contact 20 is located are set as an included angle, the plane where the first clapping surface 11 is located corresponds to a first plane C in fig. 3, the plane where the pin of the fixed contact 20 is located corresponds to a second plane D in fig. 3, and the first plane C and the second plane D are set as an included angle, where the included angle is a first included angle α.

Alternatively, the mating surfaces of the contact portion 12 and the mating portion 22 are disposed parallel to the plane of rotation of the movable contact 10.

Referring to fig. 1 and 2, the plugging surfaces of the contact portion 12 and the mating portion 22 are parallel to the rotation plane of the moving contact 10, and the rotation plane of the moving contact 10 is parallel to the plane of the pin of the fixed contact 20.

Optionally, the pins of the fixed contact 20 are used for being connected with external components through screws or welding; when the pins of the two fixed contacts 20 are connected with the external component by welding, the pins of the two fixed contacts 20 extend to the same side of the shell of the contact unit in the same direction.

That is, in this embodiment, the pins of the fixed contact 20 may be connected to the external component by using a screw connection method, or may be connected to the external component by using a welding connection method, and specifically, a person skilled in the art may select the pin according to the needs. For example, both stationary contacts 20 may be wired with screws; welding wires can also be adopted; still alternatively, one fixed contact 20 may be wired by a screw, and the other fixed contact 20 may be wired by welding.

In order to enhance the contact reliability of the moving contact 10 and the fixed contact 20, optionally, in this embodiment, a surface of the moving contact 10 for mating with the fixed contact 20 is convex.

Note that, a silver point 50 may be provided on a surface of the moving contact 10 close to the fixed contact 20, and the silver point 50 is a conductive surface made of silver provided on a surface of the moving contact 10 facing the fixed contact 20. The convexity may be located on the silver spot 50 as shown in fig. 8.

Of course, in other embodiments, the surface of the stationary contact 20 for mating with the moving contact 10 may be convex. Specifically, the person skilled in the art can set up by himself as required.

Referring to fig. 6, in another aspect of the present utility model, there is further provided a contact unit 100, a housing 40 of the contact unit 100, and the contact assembly provided in the housing 40. Since the specific structure and the beneficial effects of the contact support 30 are described in detail above, the present utility model is not repeated.

The housing 40 should have a receiving cavity, so that the moving contact 10 and the two fixed contacts 20 can be disposed in the receiving cavity.

In addition, referring to fig. 6, the two stationary contacts 20 provided by the present utility model are located in the accommodating cavity, and the pins thereof extend from the accommodating cavity, so as to facilitate wiring.

To facilitate the connection of the two fixed contacts 20, in this embodiment, the pins of the two fixed contacts 20 may be distributed on opposite sides of the housing 40 (i.e., the pins of the two fixed contacts 20 are located at opposite corners of the housing 40, as shown in fig. 4, 5 and 6). Of course, in other embodiments, the pins of the two fixed contacts 20 may be distributed on one side of the housing 40, as shown in fig. 2.

In addition, the pins of the two fixed contacts 20 may all adopt screw connection, as shown in fig. 4; the connection wires can be plug-in connection wires, as shown in fig. 2; alternatively, one fixed contact 20 may be a screw connection type, and one fixed contact may be a plug-in type connection, as shown in fig. 5.

Referring to fig. 7, in still another aspect of the present utility model, there is provided a disconnecting switch, which includes a plurality of contact units 100 stacked and disposed, and further includes an operating mechanism 200 and a handle 300 connected to the operating mechanism 200, wherein the handle 300 drives the moving contact 10 to rotate by the operating mechanism 200 to contact with or separate from the fixed contact 20.

Since the specific structure and the beneficial effects of the contact unit 100 are described in detail above, the present utility model is not repeated.

In addition, the specific structure of the operating mechanism 200 and the handle 300 thereof is not limited, and a person skilled in the art can design the operating mechanism by himself as long as the operating mechanism 200 is driven to move by the handle 300, and then the moving contacts 10 of the plurality of contact units 100 are driven to move by the operating mechanism 200 to realize switching on/off.

The above description is only of alternative embodiments of the present utility model and is not intended to limit the present utility model, and various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.

Claims (10)

1. The contact assembly is characterized by comprising a moving contact (10) and two fixed contacts (20); the two fixed contacts (20) are distributed at the opposite ends of the moving contact (10), the moving contact (10) is driven to rotate, and the opposite ends of the moving contact (10) can be respectively contacted with the two fixed contacts (20) to switch on the isolating switch or respectively separated from the two fixed contacts (20) to switch off the isolating switch;

when the moving contact (10) rotates between a switching-off position and a switching-on position, the sweeping area of the moving contact (10) is not overlapped with the projection of at least one of the two fixed contacts (20) in the direction of the rotating axis of the moving contact (10).

2. Contact assembly according to claim 1, characterized in that, when the moving contact (10) is in the closing position, the orthographic projection of at least one of the two stationary contacts (20) in the first direction (a) and the moving contact (10) have an at least partial overlap; when the moving contact (10) is in a closing position, the first direction (a) is the width direction of the moving contact (10).

3. The contact assembly according to claim 2, wherein at least one end of the moving contact (10) is provided with a first mating surface (11), and the stationary contact (20) corresponding to the first mating surface (11) has a second mating surface (21); the first clapping surface (11) is matched with the second clapping surface (21), so that when the moving contact (10) is in a closing position, the first clapping surface (11) and the second clapping surface (21) are arranged in opposite directions and are in clapping contact with each other.

4. A contact assembly according to claim 3, wherein the movable contact (10) is provided with a first mating surface (11) at each of its opposite ends, and the stationary contact (20) is provided with a second mating surface (21); the first clapping surfaces (11) are matched with the second clapping surfaces (21), so that when the moving contact (10) is in a closing position, the two first clapping surfaces (11) and the two second clapping surfaces (21) are in one-to-one corresponding clapping contact.

5. A contact assembly according to claim 3, wherein one end of the moving contact (10) is provided with a first beating surface (11) and the other end is provided with a contact portion (12); the fixed contact (20) corresponding to the first beating surface (11) is provided with a second beating surface (21), and the fixed contact (20) corresponding to the contact part (12) is provided with a matching part (22); the first clapping surface (11) is matched with the second clapping surface (21), so that when the moving contact (10) is in a closing position, the first clapping surface (11) and the second clapping surface (21) are arranged in opposite directions and are in clapping contact with each other, and the contact part (12) is connected with the matching part (22) in a plugging manner.

6. The contact assembly according to any one of claims 3 to 5, wherein the first and second mating surfaces (11, 21) are respectively disposed at an angle to the plane of rotation of the moving contact (10);

and/or, the first clapping surface (11) and the second clapping surface (21) are respectively arranged at an included angle with the plane where the pin of the fixed contact (20) is located.

7. The contact assembly according to claim 1, characterized in that the pins of the stationary contact (20) are intended to be connected with external components by means of screws or welding; when the pins of the two fixed contacts (20) are connected with external parts through welding, the pins of the two fixed contacts (20) extend to the same side of the shell of the contact unit in the same direction.

8. The contact assembly according to claim 1, wherein the face of the moving contact (10) intended to cooperate with the stationary contact (20) is convex.

9. A contact unit (100) comprising a housing (40) and a contact assembly according to any one of claims 1 to 8 provided within the housing (40).

10. A disconnecting switch, characterized by comprising a plurality of contact units (100) according to claim 9, which are arranged in a stacked manner, and further comprising an operating mechanism (200) and a handle (300) connected with the operating mechanism (200), wherein the handle (300) drives a moving contact (10) to rotate through the operating mechanism (200) so as to be contacted with or separated from a fixed contact (20).