Contact structure, change-over switch and power distribution equipment

Abstract

The invention provides a contact structure, a change-over switch and power distribution equipment, and relates to the technical field of low-voltage electric appliances. The contact structure comprises a moving contact group, an arc contact structure and a static contact group which can be electrically connected with the moving contact group. The moving contact group comprises at least two stacked main contact plates, the arc contact structure comprises at least two arc contact plates, and the at least two arc contact plates are arranged between the stacked main contact plates and can rotate relative to the main contact plates; the contact structure further comprises at least one elastic part, the end portion of the elastic part abuts against the middle of the side edge of the main contact plate and makes contact with the side edge of the arc contact plate, and the elastic part tightly presses the side edge of the arc contact plate. According to the contact structure obtained by the design, the rotation and connection stability of the arc contact plate and the main contact plate can be ensured through the arrangement of the elastic part, so that the arc contact always generates a trend of a force for connecting the arc contact with the static contact group, the number of parts and the cost are reduced, and the assembly efficiency is improved at the same time.

Description

Technical Field

[0001] This application relates to the technical field of low-voltage electrical appliances, and more specifically, to a contact structure, a transfer switch, and a power distribution device. Background Art

[0002] In the field of electrical technology, an automatic transfer switch is used to provide an uninterrupted power supply for a load and can switch between different power sources to ensure the continuity of power supply.

[0003] In the prior art, the contact structure of an automatic transfer switch usually includes a main contact plate and an arc contact plate. The main contact plate and the arc contact plate are stacked in the accommodating cavity of a cage. Parts such as a torsion spring and a leaf spring that are in contact with the arc contact plate are arranged on the cage to ensure the rotation and connection stability of the arc contact plate and the main contact plate. However, such a setting method results in more parts in the contact structure, lower assembly efficiency, and higher costs. Summary of the Invention

[0004] This application provides a contact structure. The rotation and connection stability of the arc contact plate and the main contact plate are ensured through the arrangement of an elastic part, so that the arc contact always has a tendency to generate a force for connecting with the static contact group, which not only reduces the number of parts and costs, but also improves the assembly efficiency.

[0005] The embodiments of this application are implemented as follows:

[0006] On the one hand, an embodiment of this application provides a contact structure, including a moving contact group, an arc contact structure, and a static contact group that can be electrically connected to the moving contact group; the moving contact group includes at least two stacked main contact plates, the arc contact structure includes at least two arc contact plates, and at least two arc contact plates are arranged between the stacked main contact plates and can rotate relative to the main contact plates; the contact structure further includes at least one elastic part, the end of the elastic part abuts against the middle of the side edge of the main contact plate and is in contact with the side edge of the arc contact plate, and the elastic part presses the side edge of the arc contact plate.

[0007] Optionally, a first through hole is provided on the plate surface of the main contact plate, and a second through hole coaxial with the first through hole is correspondingly provided at the end of the arc contact plate. A rotating shaft passes through the first through hole and the second through hole in sequence, and the arc contact plate can rotate relative to the main contact plate around the rotating shaft; one end of the elastic part close to the rotating shaft abuts against the side edge of one end of the arc contact plate close to the rotating shaft.

[0008] Optionally, the contact structure further includes a contact support. The contact support is provided with an accommodating cavity for accommodating the main contact plate and the arc contact plate; the elastic part includes a spring and a thimble part. The thimble part includes a contact plate and a positioning shaft vertically arranged on the plate surface of the contact plate. The spring is sleeved on the positioning shaft, and one end of the spring abuts against the contact plate and the other end abuts against the contact support.

[0009] Optionally, the contact support includes an elastically mounted hole provided at the edge. The elastically mounted hole is a hollow cylinder and has an opening provided on the side facing the arc contact plate. The positioning shaft of the ejector pin portion passes through the opening and is connected to the elastically mounted hole. A spring is sleeved on the positioning shaft, and one end abuts against the contact plate and the other end abuts against the elastically mounted hole.

[0010] Optionally, the contact structure further includes a leaf spring. When there is one elastic portion, when the elastic portion is provided at the middle of the side edge on one side of the main contact plate, the leaf spring is correspondingly provided at the middle of the side edge on the other side of the main contact plate and is disposed opposite to the elastic portion; one end of the leaf spring close to the rotating shaft abuts against the side edge of one end of the arc contact plate close to the rotating shaft and abuts against the side edge of the main contact plate, so that the arc contact plate is electrically connected to the main contact plate.

[0011] Optionally, when there are two or more elastic portions, the elastic portions are respectively provided at the middle of the opposite side edges of the main contact plate and are disposed opposite to each other.

[0012] Optionally, the contact structure further includes elastic elements. There are multiple elastic elements, and the multiple elastic elements are disposed opposite to each other and are respectively pressed on the side of the stacked main contact plate facing away from the arc contact plate.

[0013] Optionally, a limiting groove is further provided on the side of the main contact plate and the arc contact plate close to the ejector pin portion. An inclined portion is provided on the side of the arc contact plate close to the elastic portion. The inclined portion inclines towards the side away from the elastic portion. The end portion of the ejector pin portion is disposed in the limiting groove and abuts against the side edge of one end of the arc contact plate close to the rotating shaft.

[0014] On the other hand, an embodiment of the present application further provides a change-over switch. The change-over switch includes a driving device, an operating mechanism, and the above contact structure. The driving device drives the operating mechanism to drive the contact structure to realize the closing and opening functions of the change-over switch.

[0015] On the other hand, an embodiment of the present application further provides a power distribution device, and the power distribution device is provided with the above change-over switch.

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

[0017] The contact structure provided by this application includes at least one set of contact structures, which includes a moving contact group, an arcing contact structure, and a static contact group that can be electrically connected to the moving contact group; the moving contact group includes at least two main contact plates stacked, the arcing contact structure includes at least two arcing contact plates, and at least two arcing contact plates are arranged between the stacked main contact plates and can rotate relative to the main contact plates to contact or separate from the static contact group; the contact structure also includes at least one elastic part, the end of the elastic part abuts against the middle of the side edge of the main contact plate and is in contact with the side edge of the arcing contact plate, and the elastic part presses the side edge of the arcing contact plate, so that the arcing contact plate is under the pressure of the elastic part, making the process of the arcing contact plate rotating relative to the main contact plate to be electrically connected to the static contact group more reliable and stable. The contact structure obtained by the above design can ensure the rotation and connection stability of the arcing contact plate and the main contact plate through the setting of the elastic part, making the arcing contact always tend to generate a force to connect with the static contact group, reducing both the number of parts and costs, and at the same time improving the assembly efficiency.

[0018] The change-over switch provided by the embodiment of this application includes the above-mentioned contact structure, a driving device and an operating mechanism, which can ensure the rotation and connection stability of the arcing contact plate and the main contact plate through the setting of the elastic part, making the arcing contact always tend to generate a force to connect with the static contact group, reducing both the number of parts and costs, and at the same time improving the assembly efficiency.

[0019] The power distribution equipment provided by the embodiment of this application is equipped with the above-mentioned change-over switch. The aforementioned change-over switch is applied to the power distribution equipment, and the power distribution equipment can be used in the whole-house intelligence, and is applied to the smart home and Internet of Things industries to realize the whole-house intelligent management. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of this application, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is one of the structural schematic diagrams of the contact structure provided by the embodiment of this application;

[0022] Figure 2 It is the second structural schematic diagram of the contact structure provided by the embodiment of this application;

[0023] Figure 3 It is the third structural schematic diagram of the contact structure provided by the embodiment of this application;

[0024] Figure 4 It is the cross-sectional schematic diagram of the contact structure provided by the embodiment of this application;

[0025] Figure 5 This is a schematic structural diagram of the thimble part and the spring of the contact support provided by the embodiment of the present application.

[0026] Icons: 110 - moving contact group; 111 - main contact plate; 1111 - limit groove; 120 - arcing contact structure; 121 - arcing contact plate; 1211 - inclined part; 130 - elastic part; 131 - spring; 132 - thimble part; 1321 - contact plate; 1322 - positioning shaft; 140 - contact support; 141 - elastic mounting hole; 150 - rotating shaft; 160 - elastic element; 170 - leaf spring. Specific embodiments

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0028] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the present application, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or a signal connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In one aspect of an embodiment of the present application, a contact structure is provided, comprising a moving contact group 110, an arc contact structure 120 and a stationary contact group electrically connectable to the moving contact group 110; the moving contact group 110 comprises at least two stacked main contact plates 111, the arc contact structure 120 comprises at least two arc contact plates 121, at least two arc contact plates 121 are arranged between the stacked main contact plates 111 and can rotate relative to the main contact plates 111; the contact structure also comprises at least one elastic portion 130, an end of the elastic portion 130 abuts against the middle of the side edge of the main contact plate 111 and contacts with the side edge of the arc contact plate 121, and the elastic portion 130 presses the side edge of the arc contact plate 121.

[0032] Specifically, the present application provides a contact structure. Figure 1 and Figure 2 The contact structure includes a moving contact group 110 and a stationary contact group. The moving contact group 110 can rotate in a clockwise or counterclockwise direction relative to the stationary contact group to contact or separate from the stationary contact group. The moving contact group 110 includes at least two main contact plates 111. The at least two main contact plates 111 are stacked, and the ends of the main contact plates 111 are provided with clamping parts, which can be clamped and electrically connected with the stationary contacts. The contact structure also includes an arc contact structure 120. The arc contact structure 120 includes at least two arc contact plates 121. The at least two arc contact plates 121 are arranged between the stacked main contact plates 111, and one end thereof is arranged opposite to the other end and can rotate relative to the main contact plate 111. The end of the arc contact plate 121 is provided with a snapping part, which can be snap-fitted and electrically connected with the stationary contacts. The contact structure further includes at least one elastic portion 130 , the end of which abuts against the middle of the side edge of the main contact plate 111 and abuts against the side edge of the arc contact plate 121 to provide pressure to the side edge of the arc contact plate 121 .

[0033] It should be noted that if Figure 3 As shown, in the embodiment of the present application, a limiting groove 1111 is further provided on the side of the main contact plate 111 close to the elastic part 130, and an inclined part 1211 is also provided on the side of the arc contact plate 121 close to the elastic part 130. The inclined part 1211 is arranged toward the side away from the elastic part 130 so that the arc contact piece does not block the limiting groove 1111; the end of the elastic part 130 is arranged in the limiting groove 1111 and abuts against the side edge of one end of the arc contact plate 121 close to the rotating shaft 150. The setting of the limiting groove 1111 enables the elastic part 130 to compress the arc contact plate 121 and the main contact plate 111 without affecting the normal rotation of the main contact plate 111 and the arc contact plate 121, and can also ensure the normal rotation of the main contact plate 111 and the arc contact plate 121 while providing pressure for the arc contact plate 121, thereby improving the reliability of the contact structure.

[0034] The contact structure provided by this application includes at least one set of contact structures, including a moving contact group 110, an arc contact structure 120, and a static contact group that can be electrically connected to the moving contact group 110; the moving contact group 110 includes at least two main contact plates 111 stacked on top of each other, the arc contact structure 120 includes at least two arc contact plates 121, and at least two arc contact plates 121 are arranged between the stacked main contact plates 111 and can rotate relative to the main contact plates 111 to contact or separate from the static contact group; the contact structure also includes at least one elastic part 130, the end of the elastic part 130 abuts against the middle of the side edge of the main contact plate 111 and contacts the side edge of the arc contact plate 121, and the elastic part 130 presses the side edge of the arc contact plate 121, so that the arc contact plate 121 is subjected to the pressure of the elastic part 130, making the process of the arc contact plate 121 rotating relative to the main contact plate 111 to be electrically connected to the static contact group more reliable and stable. The contact structure obtained by the above design can ensure the rotation and connection stability of the arc contact plate 121 and the main contact plate 111 through the setting of the elastic part 130, making the arc contact always tend to generate a force to connect with the static contact group. This not only reduces the number of parts and costs, but also improves the assembly efficiency.

[0035] In an implementable embodiment of this application, the plate surface of the main contact plate 111 is provided with a first through hole, and the end of the arc contact plate 121 is correspondingly provided with a second through hole coaxially arranged with the first through hole. The first through hole and the second through hole are sequentially penetrated by a rotating shaft 150, and the arc contact plate 121 can rotate relative to the main contact plate 111 around the rotating shaft 150; one end of the elastic part 130 close to the rotating shaft 150 abuts against the side edge of one end of the arc contact plate 121 close to the rotating shaft 150.

[0036] Specifically, please refer to Figure 3 . The plate surface of the main contact plate 111 is provided with a first through hole. Correspondingly, the end of the arc contact plate 121 is provided with a second through hole. The first through hole and the second through hole are coaxially arranged and correspond to each other. The first through hole and the second through hole can sequentially penetrate the rotating shaft 150, so that the arc contact plate 121 can rotate around the rotating shaft 150 relative to the main contact plate 111. One end of the elastic part 130 close to the rotating shaft 150 abuts against the side edge of the end of the arc contact plate 121 close to the rotating shaft 150, and the elastic part 130 is located between the rotating shafts 150 of the two arc contact plates 121.

[0037] Through the setting of the rotating shaft 150, it can not only provide a rotation center for the arc contact plate 121, making the rotation process of the arc contact plate 121 always tend to generate a force to connect with the static contact group, but also make the connection relationship between the main contact plate 111 and the arc contact plate 121 more stable.

[0038] Further, the contact structure further includes a contact support 140. The contact support 140 is provided with a receiving cavity for receiving the main contact plate 111 and the arcing contact plate 121; as Figure 5 shown, the elastic part 130 includes a spring 131 and a thimble part 132. The thimble part 132 includes a contact plate 1321 and a positioning shaft 1322 vertically arranged on the surface of the contact plate 1321. The spring 131 is sleeved on the positioning shaft 1322. One end of the spring 131 abuts against the contact plate 1321, and the other end abuts against the contact support 140.

[0039] Specifically, as Figure 1 and Figure 3 shown, the contact structure further includes a contact support 140. An accommodation cavity is arranged inside the contact support 140 for accommodating the main contact plate 111 and the arcing contact plate 121, so as to provide certain support and protection for the main contact plate 111 and the arcing contact plate 121. Openings are formed at opposite ends of the contact support 140. The clamping part of the main contact plate 111 and the clapping part of the arcing contact plate 121 can extend out of the contact support 140 through the openings to contact or separate from the static contact group.

[0040] The elastic part 130 includes a spring 131 and a thimble part 132. The thimble part 132 includes a contact plate 1321. A positioning shaft 1322 is vertically arranged in the middle of the contact plate 1321. The spring 131 can be sleeved on the positioning shaft 1322 to provide certain support for the spring 131. One end of the spring 131 abuts against the contact plate 1321, and the other end abuts against the contact support 140 to provide pressure to the middle part of the side edge of the arcing contact plate 121. The setting of the thimble part 132 can play a certain guiding role for the pressure provided by the spring 131, so that the arcing contact plate 121 can better receive the acting force from the spring 131, so that the arcing contact always has a tendency to generate a force connecting with the static contact group.

[0041] Further, the contact support 140 includes elastic mounting holes 141 arranged on the edge. The elastic mounting holes 141 are hollow cylinders and are provided with openings on the side facing the arcing contact plate 121. The positioning shaft 1322 of the thimble part 132 passes through the opening and is connected to the elastic mounting hole 141. The spring 131 is sleeved on the positioning shaft 1322, and one end abuts against the contact plate 1321 and the other end abuts against the elastic mounting hole 141.

[0042] Specifically, as Figure 3As shown, the contact support 140 includes an elastic mounting hole 141. The elastic mounting hole 141 is provided at the edge of the contact support 140. The elastic mounting hole 141 is in the shape of a hollow cylinder, and an opening is provided on the side facing the arc contact plate 121, so that the inside of the elastic mounting hole 141 is connected to the external environment. The positioning shaft 1322 of the thimble portion 132 can pass through the opening to be connected to the elastic mounting hole 141. The spring 131 is sleeved on the positioning shaft 1322, and one side of the spring 131 abuts against the contact plate 1321 of the thimble portion 132, and the other side abuts against the elastic mounting hole 141. Through the setting of the elastic mounting hole 141, the setting of the thimble portion 132 can be made more stable, and at the same time, the contact pressure can be provided more stably and reliably for the middle part of the side edge of the arc contact plate 121.

[0043] In an implementable embodiment of the present application, the contact structure further includes a leaf spring 170. When there is one elastic portion 130, when the elastic portion 130 is provided in the middle of the side edge on one side of the main contact plate 111, the leaf spring 170 is correspondingly provided in the middle of the side edge on the other side of the main contact plate 111 and is disposed opposite to the elastic portion 130; one end of the leaf spring 170 close to the rotating shaft 150 abuts against the side edge of one end of the arc contact plate 121 close to the rotating shaft 150, and abuts against the side edge of the main contact plate 111, so that the arc contact plate 121 is electrically connected to the main contact plate 111.

[0044] Specifically, as Figure 3 As shown, the contact structure further includes a leaf spring 170. When there is one elastic portion 130, the elastic portion 130 is provided on one side of the main contact plate 111 and the arc contact plate 121, the leaf spring 170 is correspondingly provided on the other side of the main contact plate 111 and the arc contact plate 121, and the leaf spring 170 is disposed opposite to the elastic portion 130, so that one end of the leaf spring 170 close to the rotating shaft 150 abuts against the side edge of one end of the arc contact plate 121 close to the rotating shaft 150, and at the same time abuts against the side edge of the main contact plate 111. Through such a setting method, the arc contact plate 121 can be subjected to the pressure from the elastic portion 130, and at the same time, the arc contact plate 121 and the main contact plate 111 can be stably electrically connected, further improving the stability of the connection of the contact structure.

[0045] In an implementable embodiment of the present application, when there are two or more elastic portions 130, the elastic portions 130 are respectively provided in the middle of the opposite side edges of the main contact plate 111 and are oppositely arranged.

[0046] Specifically, as Figure 4As shown, when there are two or more elastic parts 130, the elastic parts 130 are respectively arranged on opposite sides of the main contact plate 111 and are oppositely arranged, and are abutted against the middle part of the side edge of the main contact plate 111, and at the same time are abutted against the end part of the arc contact plate 121 close to the rotating shaft 150. Through such a setting method, pressure from the elastic parts 130 can be received on both opposite sides of the arc contact plate 121, and at the same time, stable electrical connection between the arc contact plates 121 can be achieved, further improving the connection stability of the contact structure.

[0047] In an implementable embodiment of the present application, the contact structure further includes elastic elements 160. There are multiple elastic elements 160, and the multiple elastic elements 160 are oppositely arranged and are respectively pressed on the side of the stacked main contact plate 111 facing away from the arc contact plate 121.

[0048] Specifically, as Figure 3 shown, the contact structure further includes elastic elements 160. There are multiple elastic elements 160. The multiple elastic elements 160 are oppositely arranged on both sides of the stacked main contact plate 111 facing away from the arc contact plate 121, and are pressed on the plate surface of the main contact plate 111, so that the arc contact plate 121 arranged between at least two main contact plates 111 can maintain permanent electrical connection with the main contact plates 111 on both sides, thereby further improving the connection stability of the contact structure. It should be noted that in a preferred solution of the present application, the elastic element 160 is a compression spring. Of course, in addition to the compression spring, the elastic element 160 can also be in other forms, and the present application does not make any restrictions on this.

[0049] On the other hand, an embodiment of the present application further provides a change-over switch. The change-over switch includes a driving device, an operating mechanism and the above-mentioned contact structure. The driving device drives the operating mechanism to drive the contact structure to realize the closing and opening functions of the change-over switch. The change-over switch can ensure the rotation and connection stability of the arc contact plate 121 and the main contact plate 111 through the setting of the elastic part 130, so that the arc contact always has a tendency to generate a force for connecting with the static contact group, which not only reduces the number of parts and costs, but also improves the assembly efficiency.

[0050] On the other hand, an embodiment of the present application further provides a power distribution device. The power distribution device is equipped with a change-over switch. The change-over switch includes a driving device, an operating mechanism and the above-mentioned contact structure. The driving device can drive the operating mechanism to drive the contact structure to realize or the closing and opening functions of the change-over switch. The power distribution device can be equipped with the aforementioned change-over switch in the power distribution device. The power distribution device can be applied to whole-house intelligence, and should be applied to the smart home and Internet of Things industries to realize whole-house intelligent management.

[0051] The above are only embodiments of the present application and are not intended to limit the protection scope of the present application. For those skilled in the art, various modifications and variations can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A contact structure, characterized in that, it includes a moving contact group (110), an arc contact structure (120), and a static contact group that can be electrically connected to the moving contact group (110); the moving contact group (110) includes at least two main contact plates (111) stacked on top of each other, the arc contact structure (120) includes at least two arc contact plates (121), and at least two arc contact plates (121) are arranged between the stacked main contact plates (111) and can rotate relative to the main contact plates (111) to contact or separate from the static contact group; the contact structure further includes at least one elastic part (130), and the end of the elastic part (130) abuts against the middle of the side edge of the main contact plate (111) and contacts the side edge of the arc contact plate (121), so that the elastic part (130) presses the side edge of the arc contact plate (121).

2. The contact structure according to claim 1, characterized in that, a first through hole is provided on the plate surface of the main contact plate (111), and a second through hole coaxially arranged with the first through hole is correspondingly provided at the end of the arc contact plate (121), and a rotating shaft (150) passes through the first through hole and the second through hole in sequence, and the arc contact plate (121) can rotate relative to the main contact plate (111) around the rotating shaft (150); one end of the elastic part (130) close to the rotating shaft (150) abuts against the side edge of one end of the arc contact plate (121) close to the rotating shaft (150).

3. The contact structure according to claim 2, characterized in that, the contact structure further includes a contact support (140), the contact support (140) is provided with a receiving cavity for receiving the main contact plate (111) and the arc contact plate (121); the elastic part (130) includes a spring (131) and a thimble part (132), the thimble part (132) includes a contact plate (1321) and a positioning shaft (1322) vertically arranged on the plate surface of the contact plate (1321), the spring (131) is sleeved on the positioning shaft (1322), and one end of the spring (131) abuts against the contact plate (1321) and the other end abuts against the contact support (140).

4. The contact structure according to claim 3, characterized in that, the contact support (140) includes an elastic mounting hole (141) provided at the edge, the elastic mounting hole (141) is in the shape of a hollow cylinder and is provided with an opening on the side facing the arc contact plate (121), the positioning shaft (1322) of the thimble part (132) passes through the opening and is connected to the elastic mounting hole (141), the spring (131) is sleeved on the positioning shaft (1322), and one end abuts against the contact plate (1321) and the other end abuts against the elastic mounting hole (141).

5. The contact structure according to claim 2, characterized in that, The contact structure also includes a leaf spring (170). When there is only one elastic part (130), the elastic part (130) is arranged at the middle of the side edge of one side of the main contact plate (111), and the leaf spring (170) is correspondingly arranged at the middle of the side edge of the other side of the main contact plate (111) and is arranged opposite to the elastic part (130); one end of the leaf spring (170) close to the rotating shaft (150) abuts against the side edge of one end of the arc contact plate (121) close to the rotating shaft (150), and abuts against the side edge of the main contact plate (111), so that the arc contact plate (121) is electrically connected to the main contact plate (111).

6. The contact structure according to claim 2, It is characterized in that When there are two or more elastic parts (130), the elastic parts (130) are respectively arranged at the middle of the side edges on the opposite sides of the main contact plate (111) and are arranged opposite to each other so as to abut against the side edge of the main contact plate (111) and at the same time abut against the side edge of one end of the arc contact plate (121) close to the rotating shaft (150).

7. The contact structure according to claim 1, It is characterized in that The contact structure further comprises an elastic element (160), wherein the elastic element (160) comprises a plurality of elastic elements (160), and the plurality of elastic elements (160) are arranged opposite to each other and are respectively pressed on a side of the stacked main contact plate (111) away from the arc contact plate (121).

8. The contact structure according to claim 3, It is characterized in that A limiting groove (1111) is further provided on the side of the main contact plate (111) and the arc contact plate (121) close to the ejector portion (132); an inclined portion (1211) is provided on the side of the arc contact plate (121) close to the elastic portion (130), and the inclined portion (1211) is inclined toward a side away from the elastic portion (130); an end of the ejector portion (132) is arranged in the limiting groove (1111) and abuts against a side edge of one end of the arc contact plate (121) close to the rotating shaft (150).

9. A transfer switch, It is characterized in that The transfer switch comprises a driving device, an operating mechanism and a contact structure according to any one of claims 1 to 8, wherein the driving device drives the operating mechanism to drive the contact structure to realize the closing and opening functions of the transfer switch.

10. A power distribution device, It is characterized in that The transfer switch comprising the above-mentioned claim 9.

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