Switch body and isolating switch

Abstract

The utility model provides a switch body and an isolating switch, and relates to the technical field of low-voltage electrical appliances, and the switch body comprises a housing, a moving contact driven to rotate in the housing, static contacts arranged at two opposite sides of the housing along a first direction, and arc extinguish chambers arranged at two opposite sides of the housing along a second direction. The two ends of the moving contact are simultaneously contacted with or separated from the static contacts on the two sides in the rotating process, and the first direction is perpendicular to the second direction. According to the switch body and the isolation switch provided by the invention, the problem that the isolation switch can bear relatively low voltage in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a switch body and an isolating switch. Background Art

[0002] Isolating switch is a switch device that is mainly used for "isolating power supply, switching operation, connecting and disconnecting small current circuits" and has no arc extinguishing function. When the isolating switch is in the open position, there is an insulation distance that meets the specified requirements and an obvious disconnection mark between the contacts; when in the closed position, it can carry the current under normal circuit conditions and the current under abnormal conditions (such as short circuit) within a specified time.

[0003] The existing isolating switch includes a handle, an operating mechanism and a switch unit connected in sequence. The switch unit includes a plurality of switch bodies arranged in a stacked manner. A static contact and a moving contact bracket driven and connected to the operating mechanism are fixedly arranged in the switch body. The moving contact is arranged on the moving contact bracket. The handle is driven and connected to the operating mechanism. The operating mechanism is connected to the moving contact bracket of each layer of the switch body to drive the moving contact to move through the moving contact bracket to contact or separate with the corresponding static contact.

[0004] The switching voltage of the isolating switch in the prior art can only reach DC1500V. According to the latest development plan of low-voltage electrical appliance industry standards, it will develop to AC2000V and DC3000V, so that the isolating switch in the prior art cannot meet the requirements. Utility Model Content

[0005] The purpose of the present application is to provide a switch body and an isolating switch to address the deficiencies in the above-mentioned prior art, so as to solve the problem that the isolating switch in the prior art can withstand a low voltage.

[0006] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0007] According to one aspect of an embodiment of the present application, a switch body is provided, comprising a shell, a moving contact driven to rotate in the shell, stationary contacts arranged on opposite sides of the shell along a first direction, and an arc extinguishing chamber arranged on opposite sides of the shell along a second direction, wherein both ends of the moving contact simultaneously contact or separate from the stationary contacts on both sides during the rotation process, and the first direction and the second direction are perpendicular to each other.

[0008] As an practicable manner, the arc extinguishing chamber includes a plurality of grids arranged along the rotation direction of the moving contact, and the plurality of grids occupy space in a first direction within the housing.

[0009] As an implementable manner, the moving contact includes a contact portion for plugging with the stationary contact and a first arc-starting portion connected to an end of the contact portion, and the first arc-starting portion extends in a rotation direction when the moving contact is separated from the stationary contact.

[0010] As an implementable manner, the end surface of the first arc-starting portion away from the contact portion includes two end surfaces connected along the rotation direction, and the two end surfaces have a first preset angle.

[0011] As an implementable manner, the end surface is connected to chamfered surfaces on both sides along the third direction, and the chamfered surfaces and the end surface have a second preset angle so that the first arc-starting portion matches the end surface of the grid piece.

[0012] As an practicable method, the static contact includes a connecting part and a lead-out part and a second arc-striking part arranged on both sides of the connecting part, and the second arc-striking part is arranged close to the arc extinguishing chamber. The connecting part is plugged into the moving contact, and the lead-out part extends out of the shell along the first direction as a connecting end.

[0013] As an implementable manner, when the moving contact is separated from the static contact, the moving contact rotates along the first circumferential direction, the first grid piece along the first circumferential direction among the multiple grid pieces is the first grid piece, and the extension direction of the second arc-starting portion is the same as the extension direction of the first grid piece.

[0014] As an implementable manner, a magnetizing block is fixedly provided on the second arc-starting portion.

[0015] As an practicable manner, the moving contact includes two contact pieces spaced apart along a third direction. When the moving contact contacts the stationary contact, the stationary contact is inserted between the two contact pieces. The third direction is perpendicular to a plane defined by the first direction and the second direction.

[0016] Another aspect of an embodiment of the present application provides an isolating switch, comprising a plurality of stacked switch bodies and an operating mechanism, wherein the operating mechanism is drivingly connected to a contact bracket of the switch body, and the operating mechanism drives the contact bracket to move to drive the moving contact away from or closer to the stationary contact.

[0017] The beneficial effects of this application include:

[0018] The present application provides a switch body, comprising a shell, a moving contact driven to rotate in the shell, stationary contacts arranged on opposite sides of the shell along a first direction, and an arc extinguishing chamber arranged on opposite sides of the shell along a second direction. The arc extinguishing chamber extends along the first direction and occupies the space in the first direction in the shell, so that the volume of the arc extinguishing chamber is larger, so that the arc extinguishing ability of the switch body is stronger, and the two ends of the moving contact are simultaneously contacted or separated from the stationary contacts on both sides during the rotation process, and the first direction is perpendicular to the second direction. The switch body has a stronger arc extinguishing ability and can disconnect higher voltages, so that the voltage that the switch body can withstand is increased, thereby solving the problem of low voltage that the isolating switch can withstand in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 One of the structural schematic diagrams of a switch body provided in an embodiment of the present application;

[0021] Figure 2 A second structural schematic diagram of a switch body provided in an embodiment of the present application;

[0022] Figure 3 A schematic diagram of the structure of a moving contact provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of the structure of a static contact provided in an embodiment of the present application;

[0024] Figure 5 A schematic diagram of the arc extinguishing length of a switch body provided in an embodiment of the present application;

[0025] Figure 6 A schematic diagram of the structure of an isolating switch provided in an embodiment of the present application.

[0026] Icon: 100-switch body; 110-housing; 120-moving contact; 121-contact portion; 122-first arc-striking portion; 123-end face; 124-chamfered surface; 130-static contact; 131-connecting portion; 132-lead-out portion; 133-second arc-striking portion; 134-magnetizing block; 140-arc extinguishing chamber; 141-first grid; 150-contact bracket; 200-isolating switch; 210-operating mechanism; A-first direction; B-second direction; C-third direction; D-first circumferential direction; α-preset angle. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. It should be noted that, in the absence of conflict, the various features in the embodiments of the present application can be combined with each other, and the combined embodiments are still within the scope of protection of the present application.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] In one aspect of the embodiment of the present application, Figure 1 and Figure 2As shown, a switch body 100 is provided, including a shell 110, a moving contact 120 driven to rotate in the shell 110, stationary contacts 130 arranged on opposite sides of the shell 110 along a first direction A, and an arc extinguishing chamber 140 arranged on opposite sides of the shell 110 along a second direction B. The two ends of the moving contact 120 are in contact with or separated from the stationary contacts 130 on both sides at the same time during the rotation process, and the first direction A and the second direction B are perpendicular to each other.

[0033] The switch body 100 of the embodiment of the present application is applied to an isolating switch 200, which includes a plurality of switch bodies 100 stacked along a third direction C and a contact bracket 150 connected to each switch body 100. The contact bracket 150 passes through each switch body 100 along the third direction C and is connected to the moving contact 120 of each switch body 100 to drive the moving contact 120 to contact or separate from the static contact 130.

[0034] When the contact support 150 drives the moving contact 120 to separate from the static contact 130, that is, when the switch body 100 is opened, an arc is generated, and the arc voltage is related to the voltage connected to the disconnector 200, that is, the arc voltage is related to the voltage that the disconnector 200 can withstand. When the arc extinguishing ability of the switch body 100 is stronger, a higher voltage can be disconnected, so that the disconnector 200 can withstand a larger voltage.

[0035] In the embodiment of the present application, the static contacts 130 are arranged on opposite sides of the shell 110 along the first direction A, and the two ends of the moving contact 120 are respectively in contact with or separated from the static contacts 130 on both sides. The arc extinguishing chamber 140 is arranged at the two ends along the second direction B in the shell 110. The arc extinguishing chamber 140 extends along the first direction A, which can make full use of the space in the switch body 100 and increase the space occupied by the arc extinguishing chamber 140, that is, increase the volume of the arc extinguishing chamber 140. Those skilled in the art should know that, under the same conditions, the larger the volume of the arc extinguishing chamber 140, the stronger the arc extinguishing ability, and the higher the voltage that can be disconnected. Therefore, the switch body 100 of the embodiment of the present application can improve the arc extinguishing ability of the switch body 100, thereby improving the voltage that the isolating switch 200 can withstand, and solving the problem of low voltage that the isolating switch 200 can withstand in the prior art.

[0036] The two ends of the moving contact 120 of the embodiment of the present application are in contact with or separated from the stationary contacts 130 on both sides. Figure 1 As shown, when the moving contact 120 rotates counterclockwise, it separates from the stationary contacts 130 on both sides. At this time, the right end of the moving contact 120 moves toward the arc extinguishing chamber 140 on the upper side, and the generated arc is extinguished by the arc extinguishing chamber 140 on the upper side; similarly, the left end of the moving contact 120 moves toward the arc extinguishing chamber 140 on the lower side, and the generated arc is extinguished by the arc extinguishing chamber 140 on the lower side. Figure 5 As shown, Figure 5 In the state after the switch body 100 is opened, the right end of the moving contact 120 rotates to the upper left, and during the rotation, the arc at the right end contacts the grid of the upper arc extinguishing chamber 140 to achieve arc extinguishing; similarly, the left end of the moving contact 120 rotates to the lower right, and during the rotation, the arc at the left end contacts the grid of the lower arc extinguishing chamber 140 to achieve arc extinguishing.

[0037] The present application provides a switch body 100, including a shell 110, a moving contact 120 driven to rotate in the shell 110, a stationary contact 130 arranged on opposite sides of the shell 110 along a first direction A, and an arc extinguishing chamber 140 arranged on opposite sides of the shell 110 along a second direction B. The arc extinguishing chamber 140 extends along the first direction A and occupies the space in the first direction A in the shell 110, so that the volume of the arc extinguishing chamber 140 is large, and the arc extinguishing ability of the switch body 100 is strong. The two ends of the moving contact 120 are in contact with or separated from the stationary contacts 130 on both sides at the same time during the rotation process. The first direction A and the second direction B are perpendicular to each other. The strong arc extinguishing ability of the switch body 100 increases the voltage that the switch body 100 can withstand, thereby solving the problem of low voltage that the isolating switch 200 can withstand in the prior art.

[0038] Optionally, the arc extinguishing chamber 140 includes a plurality of grid plates arranged along the rotation direction of the moving contact 120 , and the plurality of grid plates occupy the space in the first direction A in the housing 110 .

[0039] The arc extinguishing chamber 140 extends along the first direction A, and multiple grid plates occupy the space in the first direction A in the shell 110, so that more grid plates can be arranged in the arc extinguishing chamber 140. The more grid plates there are, the stronger the arc extinguishing ability of the arc extinguishing chamber 140. Therefore, the multiple grid plates in the embodiment of the present application occupy the space in the shell 110 along the first direction A, which can improve the arc extinguishing ability of the arc extinguishing chamber 140.

[0040] It is understandable that multiple grid plates can be arranged along the circumferential direction of the movable contact 120, or can be arranged according to actual conditions. Each grid plate can extend radially along the rotation center of the movable contact 120, or can be arranged according to specific conditions and setting positions.

[0041] In one possible implementation of the embodiment of the present application, Figure 3 As shown, the moving contact 120 includes a contact portion 121 for plugging with the stationary contact 130 and a first arc-starting portion 122 connected to the end of the contact portion 121 , and the first arc-starting portion 122 extends in the rotation direction when the moving contact 120 is separated from the stationary contact 130 .

[0042] Among them, the contact portion 121 is used to be plugged with the static contact 130 to achieve the closing of the switch body 100. The first arc-starting portion 122 extends toward the rotation direction when the moving contact 120 is separated from the static contact 130. The arc generated when the moving contact 120 is separated from the static contact 130 is conducted to the first arc-starting portion 122. Since the first arc-starting portion 122 has a certain length in the rotation direction, the arc has a certain length in the rotation direction. The arc is a charged high-temperature gas, and the grid of the arc extinguishing chamber 140 is made of metal, so that the grid has a magnetic blowing force on the arc. When the arc has a certain length in the rotation direction, the magnetic blowing force of the grid on the arc increases, thereby increasing the arc length.

[0043] Specifically, Figure 5 As shown, when the moving contact 120 does not include the first arc-starting portion 122, the arc is drawn along the direction of L1; when the moving contact 120 includes the first arc-starting portion 122, due to the existence of the first arc-starting portion 122, the arc is drawn along the direction of L2. In this way, on the one hand, the length of the arc is increased, the chance of the arc contacting the grid is increased, and the arc extinguishing ability is improved; on the other hand, the depth of the arc extending into the grid becomes greater, so that the distance between the arc and the grid is reduced, thereby improving the arc extinguishing ability.

[0044] In addition, the first arc-starting portion 122 is arranged to extend in the rotation direction when the moving contact 120 and the stationary contact 130 are separated, thereby preventing the arc from being conducted toward the direction close to the stationary contact 130 when the moving contact 120 and the stationary contact 130 are separated, resulting in a prolonged breaking time.

[0045] It can be understood that the two ends of the moving contact 120 contact or separate with the static contacts 130 on both sides to realize the closing and opening of the switch body 100. Therefore, both ends of the moving contact 120 include a contact portion 121 and a first arc-starting portion 122. Figure 1 As shown, the first arc-starting portions 122 on both sides are rotationally symmetrical.

[0046] Optional, such as Figure 3 As shown, the end surface 123 of the first arc-starting portion 122 away from the contact portion 121 includes two end surfaces 123 connected along the rotation direction, and the two end surfaces 123 have a first preset angle α.

[0047] The end face 123 of the first arc-striking portion 122 away from the contact portion 121 is set as two end faces 123, and the two end faces 123 have a preset angle α, so that the first arc-striking portion 122 has a shorter length in the radial direction on the side close to the static contact 130, thereby avoiding guiding the arc to the side close to the static contact 130, which causes the breaking time to be prolonged.

[0048] In one possible implementation of the embodiment of the present application, Figure 3As shown, the two sides of the end surface 123 along the third direction C are connected to the chamfered surface 124 , and the chamfered surface 124 and the end surface 123 have a second preset angle α so that the first arc-starting portion 122 matches the end surface 123 of the grid.

[0049] Chamfered surfaces 124 are connected to both sides of the end surface 123 along the third direction C, and the chamfered surfaces 124 and the end surface 123 have a first preset angle α, so that the thickness of the end surface 123 of the first arc-starting portion 122 away from the contact portion 121 is thinner, and the thickness gradually increases in the direction approaching the contact portion 121. In this way, the end of the first arc-starting portion 122 cooperates with the chamfer of the grid, so that the distance that the first arc-starting portion 122 extends into the grid is increased, and the distance between the arc on the first arc-starting portion 122 and the arc cutting line of the grid is smaller, thereby improving the arc extinguishing ability of the grid.

[0050] It can be understood that the end surface 123 close to the stationary contact 130 is closer to the contact portion 121. During the rotation of the moving contact 120, the distance from the grid is relatively far, and there is no need to set the chamfered surface 124. Therefore, the chamfered surface 124 is set on both sides of the end surface 123 away from the stationary contact 130, such as Figure 3 shown.

[0051] Optional, such as Figure 4 As shown, the static contact 130 includes a connecting portion 131 and a lead-out portion 132 and a second arc-striking portion 133 arranged on both sides of the connecting portion 131, and the second arc-striking portion 133 is arranged close to the arc extinguishing chamber 140. The connecting portion 131 is plugged into the moving contact 120, and the lead-out portion 132 extends out of the shell 110 along the first direction A as a connecting end.

[0052] When the moving contact 120 includes two contact pieces, the connecting portion 131 is inserted between the two contact pieces to achieve plug-in connection with the moving contact 120. When the moving contact 120 is separated from the stationary contact 130, the arc generated at the contact position between the moving contact 120 and the stationary contact 130 will move toward the arc extinguishing chamber 140 under the arc striking action of the second arc striking portion 133 to achieve arc extinguishing.

[0053] In order to achieve better arc striking of the second arc striking portion 133, as Figure 3 As shown, the connection between the second arc-striking portion 133 and the connecting portion 131 can be set to an arc shape, so as to facilitate the conduction of the arc along the connecting portion 131 to the second arc-striking portion 133, thereby achieving the guidance of the arc.

[0054] In one possible implementation of the embodiment of the present application, Figure 4 As shown, when the moving contact 120 is separated from the stationary contact 130 , the moving contact 120 rotates along the first circumferential direction D, the first grid piece along the first circumferential direction D among the multiple grid pieces is the first grid piece 141 , and the extension direction of the second arc-starting portion 133 is the same as the extension direction of the first grid piece 141 .

[0055] The extension direction of the second arc-starting portion 133 is the same as the extension direction of the first grid piece 141 , so that the arc on the second arc-starting portion 133 can be better cut by the first grid piece 141 to achieve arc extinguishing.

[0056] Optional, such as Figure 4 As shown, a magnetizing block 134 is fixedly disposed on the second arc-starting portion 133 .

[0057] The magnetizing block 134 is provided in the second arc striking portion 133 , so as to improve the arc guiding capability of the second arc striking portion 133 , so that more arcs are guided to the arc extinguishing chamber 140 , thereby improving the arc extinguishing capability of the switch body 100 .

[0058] In one possible implementation of the embodiment of the present application, Figure 3 As shown, the moving contact 120 includes two contact pieces spaced apart along a third direction C. When the moving contact 120 contacts the stationary contact 130, the stationary contact 130 is inserted between the two contact pieces. The third direction C is perpendicular to a plane defined by the first direction A and the second direction B.

[0059] The moving contact 120 is configured as two contact pieces, and the stationary contact 130 is inserted between the two contact pieces, so as to improve the stability when the moving contact 120 and the stationary contact 130 are in contact with each other, and improve the stability when the switch body 100 is closed.

[0060] When the moving contact 120 is two contact pieces, the first arc-starting portion 122 is provided on both contact pieces. Two chamfered surfaces 124 are provided on the outer sides of the two contact pieces to match the chamfers of the grid pieces.

[0061] The present application also discloses an isolating switch 200. Figure 6 As shown, the isolating switch 200 includes a plurality of stacked switch bodies 100 and an operating mechanism 210, wherein the operating mechanism 210 drives the contact support 150 to move so as to drive the moving contact 120 away from or close to the stationary contact 130. The isolating switch 200 includes the same structure and beneficial effects as the switch body 100 in the aforementioned embodiment. The structure and beneficial effects of the switch body 100 have been described in detail in the aforementioned embodiment, and will not be repeated here.

[0062] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A switch body, characterized in that: The invention comprises a housing (110), a moving contact (120) driven to rotate in the housing (110), a stationary contact (130) arranged on opposite sides of the housing (110) along a first direction (A), and an arc extinguishing chamber (140) arranged on opposite sides of the housing (110) along a second direction (B), wherein the two ends of the moving contact (120) are in contact with or separated from the stationary contacts (130) on both sides simultaneously during the rotation process, and the first direction (A) and the second direction (B) are perpendicular to each other.

2. The switch body according to claim 1, characterized in that: The arc extinguishing chamber (140) comprises a plurality of grid plates arranged along the rotation direction of the moving contact (120), and the plurality of grid plates occupy space in a first direction (A) within the housing (110).

3. The switch body according to claim 1, characterized in that: The moving contact (120) comprises a contact portion (121) for plugging into the stationary contact (130) and a first arc-starting portion (122) connected to the end of the contact portion (121), wherein the first arc-starting portion (122) extends in the direction of rotation when the moving contact (120) is separated from the stationary contact (130).

4. The switch body according to claim 3, characterized in that: The end surface (123) of the first arc-starting portion (122) away from the contact portion (121) comprises two end surfaces (123) connected along the rotation direction, and the two end surfaces (123) have a first preset angle (α).

5. The switch body according to claim 3, characterized in that: The first arc-striking portion (122) is connected to chamfered surfaces (124) on both sides of the end surface (123) away from the contact portion (121) along a third direction (C), and the chamfered surfaces (124) and the end surface (123) have a second preset angle (α) so that the first arc-striking portion (122) matches the end surface (123) of the arc-extinguishing chamber (140) grid.

6. The switch body according to claim 1, characterized in that: The static contact (130) includes a connecting portion (131) and a lead-out portion (132) and a second arc-striking portion (133) arranged on both sides of the connecting portion (131), and the second arc-striking portion (133) is arranged close to the arc-extinguishing chamber (140), the connecting portion (131) is plugged into the moving contact (120), and the lead-out portion (132) extends out of the shell (110) along the first direction (A) to serve as a connecting end.

7. The switch body according to claim 6, characterized in that: When the moving contact (120) is separated from the stationary contact (130), the moving contact (120) rotates along a first circumferential direction (D); the first grid piece along the first circumferential direction (D) among the plurality of grid pieces is the first grid piece (141); and the extension direction of the second arc-starting portion (133) is the same as the extension direction of the first grid piece (141).

8. The switch body according to claim 6, characterized in that: A magnetizing block (134) is fixedly arranged on the second arc-starting portion (133).

9. The switch body according to claim 1, characterized in that: The moving contact (120) comprises two contact pieces spaced apart along a third direction (C); when the moving contact (120) contacts the stationary contact (130), the stationary contact (130) is inserted between the two contact pieces; and the third direction (C) is perpendicular to a plane defined by the first direction (A) and the second direction (B).

10. An isolating switch, characterized in that: The invention comprises a plurality of stacked switch bodies (100) as described in any one of claims 1 to 9 and an operating mechanism (210), wherein the operating mechanism (210) is drivingly connected to a contact support (150) of the switch body, and the operating mechanism (210) drives the contact support to move so as to drive the moving contact (120) away from or close to the stationary contact (130).

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