Switch unit and rotary disconnect switch

Abstract

The present invention discloses a switch unit and a rotary isolation switch. The switch unit includes a housing, a moving contact module, and a static contact module; the moving contact module includes a driving mechanism and at least two moving contacts independent of each other; and the static contact module includes at least four static contacts, wherein every two static contacts are in contact with or separated from one moving contact to achieve a switch-on or switch-off purpose, and the two static contacts form a loop switch with the moving contacts.

Description

[0001] The present application claims priority to Chinese Patent Application CN202311003039.4 filed on August 10, 2023, which is incorporated herein by reference in its entirety.TECHNICAL FIELD

[0002] The present invention relates to the field of low-voltage electrical appliances, and more particularly, to a switch unit and a rotary isolation switch.BACKGROUND

[0003] A rotary isolation switch usually consists of an operating mechanism unit and a plurality of stacked switch units. Each switch unit includes a unit housing, and a pair of opposite static contact assemblies and a rotatable moving contact module are installed in each unit housing. The moving contact module is fixed on a rotating shaft, and the operating mechanism can manipulate the rotating shaft to rotate, so as to drive moving contacts and static contacts to contact or be engaged, such that the two static contacts are switched on or off.

[0004] Based on the design scheme of the moving contacts and the static contacts of the existing switch unit, each unit layer is provided with an incoming line and an outgoing line, and rotation lap with static contacts connected to the incoming line and the outgoing line through bridge contacts is implemented inside each unit layer, achieving switch-on and switch-off functions of a loop.

[0005] With the increasing demand for product performances and parameters on the application side, the existing rotary isolation switches can no longer meet the design requirements and need to be improved urgently.SUMMARY

[0006] An object of the present invention is to overcome the defects in the prior art and provide a switch unit.

[0007] In order to achieve the above objective, the present invention provides the following technical solution: a switch unit, comprising a housing, a moving contact module, and a static contact module, in which the moving contact module comprises a driving mechanism and at least two moving contacts independent of each other, and the static contact module comprises at least four static contacts; and every two static contacts are in contact with or separated from one moving contact, and the two static contacts and the moving contact form a loop switch.

[0008] Preferably, the moving contact module comprises a first moving contact and a second moving contact which are independent of each other; the static contact module comprises a first static contact, a second static contact, a third static contact and a fourth static contact; the first static contact and the second static contact form a loop switch with the first moving contact; the third static contact and the fourth static contact form a loop switch with the second moving contact; the first static contact and the second static contact are disposed at intervals on a first side of the housing, and the third static contact and the fourth static contact are disposed at intervals on a second side opposite the first side; and the first moving contact and the second moving contact are disposed between the first side and the second side.

[0009] Preferably, the driving mechanism comprises a rotating transmission shaft and a transmission mechanism in transmission connection with the transmission shaft; the first moving contact and the second moving contact are connected to an output end of the transmission mechanism, respectively; and one transmission shaft rotates to drive the first moving contact and the second moving contact to slide linearly.

[0010] Preferably, the transmission mechanism comprises a rotating frame fixed on the transmission shaft, and a first link and a second link hinged with the rotating frame respectively; both ends of the rotating frame protrude out of the transmission shaft in a radial direction; and the first moving contact and the second moving contact are hinged with the output ends of the first link and the second link, respectively.

[0011] Preferably, the switch unit is provided with a limiting structure to limit a movement route of the first moving contact and the second moving contact, so that the first moving contact and the second moving contact are driven by the first link and the second link to slide along a preset route, so as to be in contact with and separated from the first static contact, the second static contact, the third static contact and the fourth static contact.

[0012] Preferably, the limiting structure comprises a first sliding rail which is disposed on the housing and extends from the rotating frame to the first static contact and the second static contact, a second sliding rail which extends toward the third static contact and the fourth static contact, a first sliding block disposed on the first sliding rail, and a second sliding block disposed on the second sliding rail; and the first sliding block and the second sliding block are connected to the first moving contact and the second moving contact, respectively.

[0013] Preferably, a first driving shaft and a second driving shaft are disposed on both radial sides of the rotating frame, respectively; a first driving hole is provided in a first end of the first link; a second driving hole is provided in a first end of the second link; the rotating frame is hinged with the first driving hole of the first link and the second driving hole of the second link through the first driving shaft and the second driving shaft, respectively; a first connection hole and a second connection hole are provided in the second end of the first link and the second end of the second link; and the first link and the second link are hinged with the first moving contact and the second moving contact through the first connection hole and the second connection hole, respectively.

[0014] Preferably, the driving mechanism comprises a supporting member and sliding rails; the moving contact is mounted on the supporting member which is in sliding fit with the sliding rails; the supporting member comprises a sliding block in sliding connection with the sliding rails, a contact connection portion fixedly connected to the moving contact, and a transmission connection portion for transmission connection with the driving mechanism; the supporting member is formed integrally; the contact connection portion is disposed on the sliding block; and the transmission connection portion is disposed on the contact connection portion.

[0015] Preferably, the housing is rectangular as a whole; the first static contact and the second static contact are disposed at intervals on the left side, and close to a left side wall of the housing; the third static contact and the fourth static contact are disposed on the right side, and close to a right side wall of the housing; the transmission shaft of the driving mechanism is located in the center of the housing; the first moving contact is located between the transmission shaft and the left side wall; a first sliding rail is disposed between the transmission shaft and the left side wall; arc-extinguishing chambers are disposed on both sides of the first sliding rail, i.e., a sliding trajectory of the first moving contact; the second moving contact is located between the transmission shaft and the right side wall; a second sliding rail is disposed between the transmission shaft and the right side wall; and arc-extinguishing chambers are disposed on both sides of the second sliding rail, i.e., a sliding trajectory of the second moving contact.

[0016] Preferably, the arc-extinguishing chambers on both sides of the first sliding rail form a rectangular shape, wherein the length of an arc inlet side is the same as the length of the corresponding first sliding rail; the arc-extinguishing chambers on both sides of the second sliding rail form a rectangular shape, wherein the length of an arc inlet side is the same as the length of the corresponding second sliding rail.

[0017] Preferably, the driving mechanism comprises a rotating frame fixed on the transmission shaft, a first link and a plurality of third links; a first end of the first link is in hinged connection with a first end of the rotating frame; a second end of the first link is hinged or fixedly connected with one of the third links, the remaining third links are hinged or fixedly connected in sequence, and the last third link is provided with a driving connection portion so as to connect the first moving contact; and the driving mechanism further comprises a second link and a plurality of fourth links; a first end of the second link is in hinged connection with a second end of the rotating frame; a second end of the second link is hinged or fixedly connected with one of the fourth links, the remaining fourth links are hinged or fixedly connected in sequence, and the last fourth link is provided with a driving connection portion so as to connect the second moving contact.

[0018] The present invention further provides a rotary isolation switch. The rotary isolation switch includes at least two stacked switch units in the above scheme.

[0019] Preferably, at least one loop switch of one switch unit is connected in series with at least one loop switch of another adjacent switch unit.

[0020] The present invention further provides a rotary isolation switch. The rotary isolation switch includes at least two stacked switch units; each switch unit includes a housing, a moving contact module, and a static contact module; the moving contact module includes a driving mechanism and at least two moving contacts independent of each other; the static contact module includes at least four static contacts; the moving contact module includes a first moving contact and a second moving contact independent of each other; the static contact module includes a first static contact, a second static contact, a third static contact, and a fourth static contact; the first static contact and the second static contact form a loop switch with the first moving contact; the third static contact and the fourth static contact form a loop switch with the second moving contact; the first static contact and the second static contact are disposed at intervals on a first side of the housing; the third static contact and the fourth static contact are disposed at intervals on a second side opposite the first side; the first moving contact and the second moving contact are disposed between the first side and the second side; and the two switch units are a first switch unit and a second switch unit, respectively; one of the first static contact and the second static contact in the first housing of the first switch unit is electrically connected to one of the first static contact and the second static contact in the second housing of the second switch unit; or one of the first static contact and the second static contact in the first housing of the first switch unit is electrically connected to one of the third static contact and the fourth static contact in the second housing of the second switch unit.

[0021] Preferably, an electrical connection structure between the first switch unit and the second switch unit is disposed in the first housing of the first switch unit and the second housing of the second switch unit L; the first housing and / or the second housing are / is provided with a penetrating through hole; and the electrical connection structure penetrates the first housing through the through hole to the second housing.

[0022] According to the switch unit of the present invention, at least two moving contacts and corresponding at least four static contacts are disposed in a single-layer housing, and one moving contact and two static contacts form a loop switch. Therefore, one switch unit layer in the present invention can achieve the switch-on and switch-off control of at least two loops. In the case that one switch unit layer can control two loops, a wiring space can be set more flexibly, and a space occupied by the rotary isolation switch can be further reduced (at least twice as many loops can be controlled under the same volume, and conversely, under the case that the same number of loops is controlled, the number of layers of the rotary isolation switch of the present invention is less, so less space is occupied).

[0023] In addition, the driving mechanism includes a transmission shaft penetrating through the housing and a transmission mechanism in transmission connection with the transmission shaft; and the first moving contact and the second moving contact are connected to an output end of the transmission mechanism. One transmission shaft rotates to drive the two moving contacts to slide linearly so as to control two loop switches, which occupies less space than moving contacts in circular movement, and can make an arc-extinguishing chamber larger.

[0024] In addition, the housing of the switch unit is rectangular as a whole. Arc-extinguishing chambers are provided on both sides of a first sliding rail (i.e., a sliding trajectory of the first moving contact). Arc-extinguishing chambers are provided on both sides of a second sliding rail (i.e., a sliding trajectory of the second moving contact). The four arc-extinguishing chambers are provided in the rectangular housing. The arc-extinguishing chambers form a rectangular shape, wherein the length of an arc inlet side is basically the same as that of the corresponding sliding rail, which ensures that the entire movement stroke of the moving contacts can be subjected to arc-extinguishing protection by the arc-extinguishing chambers, thereby greatly improving an arc-extinguishing effect.

[0025] At least one loop switch of one switch unit of the rotary isolation switch of the present invention is connected in series with at least one loop switch of another adjacent switch unit. After dual-loop or multi-loop series connection, when a given voltage and a given current are broken, the number of breakpoints increases, while a breakpoint opening distance of the entire loop increases. Meanwhile, due to series connection between the switch units, the increase in the number of arc-extinguishing devices (or arc-extinguishing chambers) is more conducive to breaking an electric arc.

[0026] In addition, this series connection method makes the circuit design have higher degree of freedom, and the switch units which are connected in series can be used for special loop wiring or control according to different needs. For example, through the series connection between the switch units, the wiring direction and the outgoing direction can be adjusted, so that the wiring design has a higher degree of freedom.BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG. 1 is a schematic diagram of a switch unit in the present invention; FIG. 2 is a schematic diagram of a switch unit in the present invention in an opened state; FIG. 3 is a schematic diagram of a switch unit in the present invention in a closed state; FIG. 4 is a schematic diagram of a rotating frame of a switch unit in the present invention; FIG. 5 is a schematic structural diagram of a first link in the present invention; FIG. 6 is a schematic structural diagram of a second link in the present invention; FIG. 7 is a schematic diagram of an arrangement mode of moving contacts in another embodiment of the present invention; FIG. 8 is a schematic diagram of loop control of a switch unit in the present invention; FIG. 9 is a schematic structural diagram of a link mechanism on one side in Embodiment 2 of the present invention; FIG. 10 is a schematic structural diagram of a link mechanism on the other side in Embodiment 2 of the present invention; FIG. 11a is a schematic structural diagram of a moving contact in Embodiment 3 of the present invention; FIG. 11b is a schematic structural diagram of a moving contact in Embodiment 3 of the present invention from another perspective; FIG. 12 is a schematic structural diagram of a moving contact piece in Embodiment 3 of the present invention; FIG. 13 is a schematic structural diagram of the static contact in Embodiment 3 of the present invention; FIG. 14 is a schematic structural diagram of a supporting member in Embodiment 3 of the present invention; FIG. 15 is a schematic structural diagram of a switch unit in Embodiment 4 of the present invention; FIG. 16 is a schematic structural diagram of a housing in Embodiment 4 of the present invention; FIG. 17 is a schematic exploded view of the switch unit in Embodiment 4 of the present invention; FIG. 18a is a schematic diagram of a series connection structure of a switch unit in Embodiment 5 of the present invention; FIG. 18b is a schematic current diagram of the series connection structure of the switch unit in Embodiment 5 of the present invention; FIG. 19 is a schematic diagram of through holes connected in series inside the switch unit in Embodiment 5 of the present invention; FIG. 20a is a schematic diagram of a series connection structure of another switch unit in Embodiment 5 of the present invention; FIG. 20b is a schematic current diagram of a series connection structure of another switch unit in Embodiment 5 of the present invention; FIG. 21 is a schematic structural diagram of external series connection between the switch units in Embodiment 5 of the present invention; FIG. 22 is a schematic diagram of a series connection loop of a switch unit in Embodiment 6 of the present invention; and FIG. 23 is a schematic diagram of series connection of static contacts which are formed integrally in Embodiment 6 of the present invention. 10housing1afirst housing1bsecond housing101first sidewall102second sidewall103sliding rail103afirst sliding rail103bsecond sliding rail1030retaining wall1031sliding rail plane123through hole57limiting retaining wall20arc-extinguishing chamber30static contact31first static contact32second static contact33third static contact34fourth static contact31afirst static contact32asecond static contact31bthird static contact32bfourth static contact301contact main body302contact touch portion3111first external wire3212second wiring portion3113third wiring portion3214fourth wiring portion91series conductor91aconnection portion40moving contact41first moving contact42second moving contact40afirst moving contact piece40bsecond moving contact piece401supporting member connection portion402open structure403open structure411supporting surface413bending portion414bending portion4011connection hole4012key slot4101touch portion4102touch portion4131guide flange4141guide flange4132arc striking edge4142arc striking edge4133arc striking tip4143arc striking tip5afirst link5bsecond link5cthird link5dfourth link501afirst driving hole501bsecond driving hole60rotating frame603first driving shaft604second driving shaft70transmission shaft80supporting member801transmission connection portion802sliding block802afirst sliding block802bsecond sliding block803contact connection portion804limiting surfaceL1first switch unitL2second switch unitL3third switch unit DETAILED DESCRIPTION

[0028] The specific implementation of a switch unit of the present invention will be further described below in conjunction with the embodiments given in accompanying drawings. The switching device of the present invention is not limited to the description of the following embodiments.

[0029] A rotary isolation switch usually includes an operating unit and at least one switch unit, wherein the operating unit and the at least one switch unit are stacked; each switch unit includes a moving contact module and a static contact module; the operating unit is provided with an output shaft; the output shaft is connected to a transmission shaft 70 of the switch unit; the transmission shafts 70 of the adjacent switch units are connected; and the output shaft of the operating unit drives the transmission shafts 70 to rotate so as to drive the switch units to be closed and opened synchronously.Embodiment 1

[0030] FIGS. 1-3 show a specific embodiment of a switch unit of a rotary isolation switch. The switch unit includes a housing 10, a moving contact module and a static contact module. The moving contact module 4 includes a driving mechanism and at least two moving contacts 40 (including a first static contact 41 and a second moving contact 42) independent of each other. The static contact module includes at least four static contacts 30 (including a first static contact 31, a second static contact 32, a third static contact 33 and a fourth static contact 34).

[0031] In the present embodiment, every two static contacts 30 are switched on or off by contacting with or separating from one moving contact 40, such that the two static contacts 30 form a loop switch with the moving contact 40.

[0032] That is, one switch unit layer in the present embodiment can achieve the control of at least two loop switches, which has higher scalability than the traditional switch unit.

[0033] In the present embodiment, the moving contact module includes a first moving contact 41 and a second moving contact 42 independent of each other; the static contact module includes a first static contact 31, a second static contact 32, a third static contact 33 and a fourth static contact 34; the first static contact 31 and the second static contact 32 form a loop switch with the first moving contact 41; and the third static contact 33 and the fourth static contact 34 form a loop switch with the second moving contact 42.

[0034] In the present embodiment, the first static contact 31 and the second static contact 32 are disposed at intervals on a first side of the housing 10, and the third static contact 33 and the fourth static contact 34 are disposed at intervals on a second side opposite the first side; and the first moving contact 41 and the second moving contact 42 are disposed between the first side and the second side.

[0035] In the present embodiment, the driving mechanism includes a transmission shaft 70 penetrating through the housing 10 and a transmission mechanism in transmission connection with the transmission shaft 70; and the first moving contact 41 and the second moving contact 42 are connected to an output end of the transmission mechanism. One transmission shaft 70 rotates to drive the two moving contacts to slide so as to control two loop switches, which occupies less space. The transmission shaft 70 is basically located in the center of the housing 10. Of course, the transmission shaft 70 may also not be disposed in the center position, and both opposite sides of the transmission shaft 70 are the first side and the second side. In addition, the transmission shaft 70 may be a part that penetrates through all the switch units and may control the actions of all switch units; or the transmission shaft 70 is disposed separately on each layer, and the transmission shaft 70 on each layer is linked by a coupling or by a coupling structure.

[0036] As a specific embodiment, the transmission mechanism includes a rotating frame 60 fixed on the transmission shaft 70, and a first link 5a and a second link 5b which are hinged with both ends of the rotating frame 60, respectively; the first moving contact 41 and the second moving contact 42 are hinged with output ends of the first link 5a and the second link 5b, respectively; and the switch unit is provided with a limiting structure to limit a movement route of the first moving contact 41 and the second moving contact, so that the first moving contact and the second moving contact are driven by the first link 5a and the second link 5b to slide along a preset route, so as to be in contact with and disconnected from the first static contact 31, the second static contact 32, the third static contact 33 and the fourth static contact 34. The combination of the rotating frame 60 with the links can reduce an internal space of the housing occupied by the transmission mechanism, so as to free up more space to provide an arc-extinguishing chamber and improve an arc-extinguishing effect. Meanwhile, it is also more conducive to achieving product miniaturization. The rotating frame 60 is installed on the transmission shaft 70, both ends of the rotating frame protrude out of the transmission shaft 70 in a radial direction, and the rotating frame 60 and the transmission shaft 70 may be disposed integrally or split before assembly.

[0037] In the present embodiment, the limiting structure includes a first sliding rail 103a which is disposed on the housing 10 and extends from the rotating frame 60 to the first static contact 31 and the second static contact 32, a second sliding rail 103b which extends toward the third static contact 33 and the fourth static contact 34, a first sliding block 802a disposed on the first sliding rail 103a, and a second sliding block 802b disposed on the second sliding rail 103b; and the first sliding block 802a and the second sliding block 802b are connected to the first moving contact 41 and the second moving contact 42, respectively. The first moving contact 41 and the second moving contact 42 are disposed on two supporting members 80, respectively. The first sliding block 802a and the second sliding block 802b are connected to the first moving contact 41 and the second moving contact 42 respectively as part of their respective supporting support 80. The first sliding block 802a and the second sliding contact 802b slide in the first sliding rail 103a and the second sliding rail 103b respectively to drive the first moving contact 41 and the second moving contact 42 to slide in the first sliding rail 103a and the second sliding rail 103b. The first sliding rail 103a and the second sliding rail 103b limit the positions of the first sliding block 802a and the second sliding block 802b. A sliding direction of the moving contacts is limited by the first sliding rail 103a and the second sliding rail 103b, so as to control the positions of the output ends of the first link 5a and the second link 5b, such that the moving contacts slide on the sliding rails, thereby ensuring the effective use of the internal space. As shown in FIG. 2, a sliding distance L2 of the moving contact is also an opening distance of the switch, and a sliding route of the moving contact in L2 is a straight line area, which occupies very little space.

[0038] For the first moving contact 41 and the second moving contact 42, in order to enable the sliding of the first sliding rail 103a and the second sliding rail 103b, the corresponding sliding blocks (the first sliding block 802a and the second sliding block 802b) will be provided to ensure that their sliding is limited.

[0039] In the present embodiment, the moving contacts 40 slide through the sliding rails 103. The preferred sliding rails 103 are linear sliding rails, such that a movement trajectory of the moving contacts is a straight line, such that less space can be occupied. The first sliding rail 103a is located between the first static contact 31 and the second static contact 32, and the second sliding rail 103b is located between the third static contact 33 and the fourth static contact 34.

[0040] However, in some embodiments, for a special space design, the sliding rails may also be in the form of a curved structure, such as a segment of arc or a combination of multiple segments of arcs.

[0041] In the present embodiment, in conjunction with FIGS. 1, 4, 5 and 6, a first driving shaft 603 and a second driving shaft 604 are disposed at both ends of the rotating frame 60, respectively. A first driving hole 501a is formed in a first end of the first link 5a, and a second driving hole 501b is formed in a first end of the second link 5b. The rotating frame 60 is hinged with the first driving hole 501a of the first link 5a and the second driving hole 501b of the second link 5b through the first driving shaft 603 and the second driving shaft 604, respectively.

[0042] In the present embodiment, driving connection portions at the second ends of the first link 5a and the second link 5b are the first connection hole 502a and the second connection hole 502b. The first link 5a and the second link 5b are hinged with the moving contacts through the connecting shaft. That is, the first connection hole 502a and the second connection hole 502b are hinged with the first moving contact 41 and the second moving contact 42 through connecting shafts, respectively.

[0043] A driving principle of the driving mechanism in the present embodiment is as follows: the rotating frame 60 forms a two-link mechanisms respectively with the first link 5a and the second link 5b; the transmission shaft 70 rotates under the drive of the operating mechanism, and at the same time drives the rotating frame 60 to rotate; the rotating frame 60 rotates to drive the first link 5a and the second link 5b to move at the same time; and the first link 5a and the second link 5b drive the moving contacts to move. Since the sliding of the moving contacts is limited by the first sliding rail 103a and the second sliding rail 103b only along the sliding rails, a movement range of the first link 5a and the second link 5b is also reversely limited, ensuring a movement range of the two-link mechanism.

[0044] As another specific embodiment, as shown in FIG. 7, the driving mechanism includes a transmission shaft 70 penetrating through the housing 10 and a rotating frame 60 in transmission connection with the transmission shaft 70; and the first moving contact 41 and the second moving contact 42 are respectively disposed on both sides of the rotating frame 60, and correspond to the positions of the first static contact 31, the second static contact 32, the third static contact 33 and the fourth static contact 34, respectively.

[0045] Different from the above-mentioned movement mode of the moving contacts 40, a movement mode of the moving contacts in an alternative embodiment is a circular movement directly driven by the rotating frame 60. In the circular movement process, the first moving contact 41 can achieve the contact with the first static contact 31 and the second static contact 32, and enables the first static contact 31 and the second static contact 32 to be switched on. Similarly, the movement and switch-on principles of the second moving contact 42 are also the same. In order to achieve the simultaneous contact between the first moving contact 41 with the first static contact 31 and the second static contact 32, in an axial direction (an axial direction of the transmission shaft 70), the first static contact 31 and the second static contact 32 can be highly biased, and touch portions 4101 and 4102 at both ends of the first moving contact 41 are biased relative to the heights of the first static contact 31 and the second static contact 32 respectively, such that the first static contact 31 and the second static contact 32 can contact the touch portions 4101 and 4102 at the same time.

[0046] Relatively speaking, the moving contacts in the circular movement will occupy a larger space inside the housing, resulting in the volume of the arc-extinguishing chamber being compressed, which is not conducive to the miniaturization design of the product.

[0047] Referring to FIG. 1, the housing 10 of the switch unit in the present embodiment is rectangular as a whole. The first static contact 31 and the second static contact 32 is disposed at intervals on the left side, and close to a left side wall of the housing 10. The third static contact 33 and the fourth static contact 34 are disposed on the right side, and close to a right side wall of the housing 10. The transmission shaft 70 of the driving mechanism is located in the center of the housing 10. The first moving contact 41 is located between the transmission shaft 70 and the left side wall. A first sliding rail 103a is disposed between the transmission shaft 70 and the left side wall. The first sliding rail 103a is parallel to an upper side wall of the housing 10. The driving mechanism drives the first moving contact 41 to slide linearly along the first sliding rail 103a toward the left side wall, and both ends of the first moving contact cooperate with the first static contact 31 and the second static contact 32 respectively, such that a loop is switched on. Arc-extinguishing chambers 20 are disposed on both sides of the first sliding rail 103a (i.e., a sliding trajectory of the first moving contact 41), respectively. That is, an arc-extinguishing chamber 20 is disposed between the first sliding rail 103a and the upper side wall of the housing 10, and between the first sliding rail 103a and a lower side wall of the housing 10, respectively. The second moving contact 42 is located between the transmission shaft 70 and the right side wall. A second sliding rail 103b is disposed between the transmission shaft 70 and the right side wall. The driving mechanism drives the second moving contact 42 to slide linearly along the second sliding rail 103b toward the right side wall, and both ends of the second moving contact cooperate with the third static contact 31 and the fourth static contact 32 respectively, such that another loop is switched on. Arc-extinguishing chambers 20 are disposed on both sides of the second sliding rail 103b (i.e., a sliding trajectory of the second moving contact 42). That is, an arc-extinguishing chamber 20 is disposed between the second sliding rail 103b and the upper side wall of the housing 10, and between the second sliding rail 103b and the lower side wall of the housing 10, respectively. A length direction of the first moving contact 41 and the second moving contact 42 is perpendicular to their respective sliding direction. That is, four arc-extinguishing chambers 20 are disposed in the rectangular housing 10. The arc-extinguishing chambers form a rectangular shape, wherein the length of an arc inlet side is substantially consistent with that of the corresponding sliding rail 103.

[0048] Based on the above embodiment, the present invention may further provide a rotary isolation switch. The rotary isolation switch includes at least two stacked switch units in the above embodiment. The switch units are linked through the transmission shaft 70.

[0049] Continued to FIG. 2 and FIG. 3, a schematic diagram of the switch unit in the present embodiment in a closed state and an opened state is shown. A structure where the housing 10 is removed from the two stacked switch units is shown in the present embodiment. The switch unit on the upper layer has two loop switches, and the switch unit on the lower layer has two loop switches. Two loop switches in one switch unit are located in the same horizontal space, and the two switch units are stacked in a vertical direction (an axis direction of the transmission shaft 70). As shown in FIG. 2 and FIG. 3, in the closed state, the first moving contact 41 and the second moving contact 42 are in contact with the static contacts on both sides of the housing, respectively; and in the opened state, the first moving contact 41 and the second moving contact 42 contract to a peripheral area of the transmission shaft 70, and are separated from the static contacts on both sides of the housing, respectively. Continued to FIG. 8, the first moving contact 41, the first static contact 31 and the second static contact 32 on one side of one switch unit can switch a loop I1 on after being closed, while the same structural design is adopted for the other side. Therefore, the switch-on control of another loop can also be achieved. The first moving contact 41, the first static contact 31 and the second static contact 32 on one side of the other switch unit can switch a loop I2 on after being closed, while the same structural design is adopted for the other side of the other switch unit. Therefore, the switch-on control of another loop can also be achieved.

[0050] Based on this, one switch unit in the present embodiment can achieve switch-on or switch-off control of at least two loops, which has higher scalability than the traditional rotary isolation switch.

[0051] In the present embodiment, the two loop switches of the switch unit are disposed left and right and located in a space on the same layer. As other embodiments, the loop switch in the switch unit composed of the first static contact 31a, the second static contact 32a and the first moving contact 40a is stacked with the loop switch composed of the third static contact 31b, the fourth static contact 32b and the second moving contact 40b, and the two loop switches may be connected independently or in series.Embodiment 2

[0052] As another alternative embodiment, as shown in FIG. 9, the driving mechanism includes a rotating frame 60, a first link 5a and a plurality of third links 5c, wherein a first end of the first link 5a is in hinged connection with a first end of the rotating frame 60; a second end of the first link 5a is hinged or fixedly connected with one of the third links 5c, the remaining third links 5c are hinged or fixedly connected in sequence, and the last third link 5c is provided with the driving connection portion; and a movement range of connecting the moving contact 41 and the third link 5c is limited by a limiting retaining wall 57, so as to ensure that the movement direction of the moving contacts 41 faces the static contacts. The movement of the third link 5c is limited by a sliding groove, so as to ensure its movement posture. Through the plurality of third links 5c, in some cases, the situation that the movement distance of the second link 5a cannot make the moving contact used under a preset distance can be remedied, while the length of the rotating fame may also be reduced to further reduce an occupied space.

[0053] Similarly, as shown in FIG. 10, the driving mechanism further includes a second link 5b and a plurality of fourth links 5d, wherein a first end of the second link 5b is in hinged connection with a second end of the rotating frame 60; a second end of the second link 5b is hinged or fixedly connected with one of the fourth links 5d, the remaining fourth links 5d are hinged or fixedly connected in sequence, and the last fourth link 5d is provided with the driving connection portion; and a movement range of connecting the moving contact 42 and the third link 5c is limited by a limiting retaining wall 57, so as to ensure that the movement direction of the moving contacts 42 faces the static contacts.Embodiment 3

[0054] In the present embodiment, as shown in FIGS. 11a-14, the moving contact 40 includes a first moving contact piece 40a and a second moving contact piece 40b, wherein the first moving contact 40a and the second moving contact 40b are oppositely spliced; bending portions 413, 414 which are bent oppositely outward are disposed at both ends of the first moving contact 40a and the second moving contact 40b, respectively; the bending portions 413, 414 form open structures 402, 403, respectively; the open structures 402, 403 are used for clamping the touch portion corresponding to the static contact assembly to achieve a closing purpose; and the open structures 402, 403 are adapted in shape to the static contact assembly (the first static contact 31, the second static contact 32, the third static contact 33 and the fourth static contact 34), so that the open structures and the static contact assembly can clamp and contact each other.

[0055] Further, a supporting member connection portion 401 is disposed in the middle of the first moving contact piece 40a and in the middle of the second moving contact piece 40b and used to be in mounting fit with a contact connection portion 803 of the supporting member 80. A section of the contact connection portion 803 matches the supporting member connection portion 401. The supporting member connection portion 401 includes a connection hole 4011 and a key groove 4012 on the side wall. The moving contact 40 is installed on the contact connection portion 803 through the supporting member connection portion 401, and can be well connected to avoid the occurrence of loosening and rotation of the moving contact 40.

[0056] As another alternative embodiment, the static contact in the static contact assembly may be in the form of an open structure, while the moving contact may be a single-piece structure, and the open structure of the static contact can clamp the touch portion of the moving contact.

[0057] Further, guide flanges 4131, 4141 which are bent outward are disposed at the open structures 402, 403 of the second moving contact piece 40b. The guide flanges 4131, 4141 form flared structures. The guide flanges 4131, 4141 are disposed toward the static contact and located on side edges of the first moving contact piece 40a and the second moving contact piece 40b. A clearance between the flared structures is larger than a clearance between the open structures, such that the static contact can be smoothly clamped into the open structures 402, 403.

[0058] In the present embodiment, arc striking edges 4132, 4142 and arc striking tips 4133, 4143 are also disposed on outer end edges of the bending portions 413, 414. The arc striking edges 4132, 4142 are tilted relative to a movement route of the moving contact 40. The arc-extinguishing chamber 20 is disposed outside a movement trajectory of the arc striking tips 4133, 4143 of the moving contact 40. A distance between the first end of the arc striking edges 4132, 4142 and the arc-extinguishing chamber 20 is greater than a distance between the second ends of the arc striking edges 4132, 4142 and the arc-extinguishing chamber 20. The arc striking tips 4133, 4143 are disposed at the second ends of the arc striking edges 4132, 4142.

[0059] Further, in conjunction with FIG. 12, the arc striking edges 4132, 4142 and the arc striking tips 4133, 4143 are disposed at both ends of the first moving contact piece 40a and the second moving contact piece 40b, respectively. A connecting line between both ends of the first moving contact piece 40a and the second moving contact piece 40b is perpendicular to their movement direction. The arc-extinguishing chambers 20 are disposed outside the arc striking tips 4133, 4143 at both ends of the first moving contact piece 40a and the second moving contact piece 40b, respectively.

[0060] Further, in conjunction with FIG. 13, the static contact 30 includes a contact main body 301 and a contact touch portion 302 which extends from the contact main body 301 to the moving contact 40; and the contact main body 301 is clamped between the arc-extinguishing chamber 20 and the side wall of the housing. The static contact 30 is closely clung to the arc-extinguishing chamber 30, such that the entire stroke of the moving contact 40 is subjected to arc-extinguishing protection by the arc-extinguishing chamber 20, and electric arcs can quickly enter the arc-extinguishing chamber to be extinguished, thereby improving the arc-extinguishing effect.

[0061] Further, in conjunction with FIG. 14, the moving contact 40 is installed on the supporting member 80 and in sliding fit with the sliding rails 103. The supporting member 80 includes a sliding block 802 in sliding connection with the sliding rails 103, a contact connection portion 803 fixedly connected to the moving contact 40, and a transmission connection portion 801 for transmission connection with the driving mechanism. The supporting member 80 is formed integrally. The contact connection portion 803 is disposed on the sliding block 802. The transmission connection portion 801 is disposed on the contact connection portion 803.Embodiment 4

[0062] As shown in FIGS. 15-17, in the present embodiment, the switch unit includes only a driving mechanism, a supporting member 80 and a moving contact 40; and the static contact module only includes a first static contact 31 and a second static contact 32. Of course, the driving mechanism of the present embodiment has the same structure and principle as those of the driving mechanism in Embodiment 1, and will not be described in detail in the present embodiment.

[0063] In the present embodiment, the moving contact 40 may slide under the driving of the driving mechanism and is in contact with or separated from the first static contact 31 and the second static contact 32, achieving a switch-on or switch-off purpose. The two static contacts 30 (the first static contact 31 and the second static contact 32) and the moving contact 40 form a loop switch, which functions as a switch in the loop. Further, in the present embodiment, the moving contact 40 slides linearly, that is, the movement trajectory is a linear movement trajectory.

[0064] In the present embodiment, the housing is also provided with sliding rails 103. The supporting member 80 includes a sliding block 802 in sliding connection with the sliding rails 103, a contact connection portion 803 fixedly connected to the moving contact 40, and a transmission connection portion 801 in transmission connection with the driving mechanism; and the sliding rails 103 extend from a position adjacent to the driving mechanism toward the static contact module, and is adjacent to the static contact module. The moving contact 40 can move along the sliding rails 103 under the drive of the driving mechanism to contact the first static contact 31 and the second static contact 32, or to be disengaged from the static contact.

[0065] In the present embodiment, the first static contact 31 and the second static contact 32 are disposed at intervals on the first side of the housing 10, and the moving contact 40 and the driving mechanism are disposed on the second side of the housing 10 of the switch unit, such that an arrangement space for the arc-extinguishing chambers can be maximized, while the opening distances of the static contact and the moving contact are maximized. As shown in FIG. 1, the first static contact 31 and the second static contact 32 are disposed close to the first side wall 101 of the housing 10, and basically closely clung to the side wall of the first side. The driving mechanism is disposed close to the second side wall 102, and is basically closely clung to the side wall of the second side. The sliding rails 103 extend from the driving mechanism to the first side wall 101 in a direction perpendicular to the second side wall 102, such that the opening distance is maximized. The two arc-extinguishing chambers are disposed on both sides of the sliding rails 103, respectively, such that the arc-extinguishing chambers are maximized.

[0066] In conjunction with FIG. 16 and FIG. 17, the sliding rails 103 are formed by two parallel retaining walls 1030 disposed on the bottom surface of the housing 10; and the sliding rails 103 extend from the second side of the housing 10 to the edge on the first side of the housing 10, and is close to the first static contact 31 and the second static contact 32. The moving contact 40 may slide linearly along the sliding rails 103 under the drive of the driving mechanism. The retaining wall 1030 may be a raised rib or a side wall of a sliding groove. The supporting member 80 of the moving contact 40 is provided with a sliding block 802, and the moving contact 40 slides in the sliding rails 103 through the sliding block 802.

[0067] In the present embodiment, a sliding rail surface 1031 is provided at the top of the retaining wall 1030. The moving contact 40 is provided with a supporting surface 411. The supporting surface 411 is provided on the sliding rail surface 1031. The moving contact 40 slides on the sliding rail surface 1031 through the supporting surface 411. By contacting the supporting surface 411 with the sliding rail surface 1031 on the retaining wall 1030, the sliding block 802 can be lifted or the sliding block 802 can reduce friction. The sliding of the sliding block 802 is limited only by the two inner walls of the retaining wall, while the main friction is generated by a contact surface between the supporting surface 411 and the retaining wall 1030, and its contact area can be set smaller than that of the sliding block, leading to a smaller sliding friction, so that the moving contact 40 slides more smoothly.Embodiment 5

[0068] Based on the above embodiment, the present embodiment provides a rotary isolation switch. The rotary isolation switch includes an operating unit and at least one switch unit. The operating unit and the at least one switch unit are stacked. Each switch unit includes a contact module. The contact module includes a moving contact, two static contacts matching the corresponding moving contacts, and a contact driving mechanism. The moving contacts and two static contacts form a loop switch. The operating unit is provided with an output shaft. The output shaft is connected to the contact driving mechanism of the switch unit. The contact driving mechanisms of the adjacent switch units are connected. The output shaft rotates to drive the action of the contact driving mechanism. The contact driving mechanism drives the moving contact to be in contact with or disconnected from the two static contacts at the same time, achieving the closing and opening of the switch unit.

[0069] Referring to FIGS. 18a-22, the rotary isolation switch of the present embodiment includes an operating unit (not shown) and at least two switch units. The operating unit and the at least two switch units are stacked. FIG. 1 shows internal structures of the two switch units, wherein the two switch units are a first switch unit L1 and a second switch unit L2, respectively. FIG. 2 shows a structure of two switch units having housings, wherein the two switch units are stacked, and an upper cover of a first housing 1a of the first switch unit L1 on the upper layer is removed. FIG. 20a shows an example with three switch units, namely a first switch unit L1, a second switch unit L2, and a third switch unit L3, respectively. The contact modules of the switch units constitute a contact system of the rotary isolation switch, and the structures of the switch units may be the same or different. In general cases, the structures of the switch units of the same rotary isolation switch are the same.

[0070] As shown in FIG. 18a, the present embodiment provides a contact system. The contact system includes at least two contact modules respectively disposed in two switch units, and the two contact modules in the present embodiment are a first contact module disposed in the first switch unit L1 and a second contact module disposed in the second switch unit L2.

[0071] In the present embodiment, the first contact module includes a first moving contact 40a, a first static contact 31a and a second static contact 32a, and the first moving contact 40a is in contact with or disengaged from the first static contact 31a and the second static contact 32a at the same time in a sliding manner, such that the first static contact 31a and the second static contact 32a are switched on and off.

[0072] In the present embodiment, the second contact module includes a second moving contact 40b, a third static contact 31b and a fourth static contact 32b, and the second moving contact 40b is in contact with or disengaged from the third static contact 31b and the fourth static contact 32b at the same time in a sliding manner, such that the third static contact 31b and the fourth static contact 32b are switched on and off.

[0073] One of the first static contact 31a and the second static contact 32a is electrically connected to one of the third static contact 31b and the fourth static contact 32b to achieve the series connection of the first switch unit L1 and the second switch unit L2; and the first moving contact 40a, the first static contact 31a, the second static contact 32a, the second moving contact 40b, the third static contact 31b and the fourth static contact 32b form a dual-breakpoint loop switch.

[0074] Based on the present embodiment, the first switch unit L1 and the second switch unit L2 are formed as a whole through series connection, which is equivalent to that the first switch unit L1 and the second switch unit L2 are connected in series to form a new independent and complete switch unit for switching a loop on or off, and this switch unit includes a first switch unit L1 and a second switch unit L2. The first switch unit L1 and the second switch unit L2 may be integrated in a single housing. Of course, separate housing structures may also be used, respectively.

[0075] Of course, after the first switch unit L1 and the second switch unit L2 are connected in series as a whole, they may still be connected in series with other switch units to form a multi-breakpoint switch.

[0076] According to the contact system in the present embodiment, the static contacts of the contact modules between adjacent switch units are connected in series, so as to achieve the series connection between at least one loop switch of the first switch unit L1 and at least one loop switch of the second switch unit L2. That is, at least one loop switch of one switch unit is connected in series with at least one loop switch of another adjacent switch unit. After dual-loop or multi-loop series connection, when a given voltage and a given current are broken, the number of breakpoints increases, while a breakpoint opening distance of the entire loop increases. Meanwhile, due to series connection between the switch units, the increase in the number of arc-extinguishing devices (or arc-extinguishing chambers) is more conducive to breaking an electric arc. In addition, this series connection method makes the circuit design have higher degree of freedom, and the switch units which are connected in series can be used for special loop wiring or control according to different needs. For example, through the series connection between the switch units, the wiring direction and the outgoing direction can be adjusted, so that the wiring design has a higher degree of freedom. For example, under the given voltage and current conditions, a single-layer single-sided loop can meet its electrical performance requirements, and the wiring capacity (number of loops) of the same product is 16. However, under another given voltage and current conditions, two loops must be connected in series to meet their electrical performance requirements, and the wiring capacity (number of loops) of the same product is half of that in Embodiment 1, that is, 8 main loops. This allows for higher electrical performances by connecting more switch units in series.

[0077] In the present embodiment, the structure and layout of the first switch unit L1 and the second switch unit L2 are the same, that is, the structures of the first contact module and the second contact module are the same. In the present embodiment, in conjunction with FIGS. 18a and 18b, a description is made by taking the first switch unit L1 as an example. The first static contact 31a and the second static contact 32a are disposed in the first housing 1a of the first switch unit L1. The first static contact 31a and the second static contact 32a are in contact with the first moving contact 40a to achieve a switch-on purpose, or the first static contact 31a and the second static contact 32a are disengaged from the first moving contact 40a to achieve circuit breaking. The first static contact 31a, the second static contact 32a and the first moving contact 40a form a loop switch. The first static contact 31a and the second static contact 32a are used to connect a power supply and a load respectively, and can work independently. The second switch unit L2 also has a similar structure, wherein the third static contact 31b, the fourth static contact 32b and the second moving contact 40b form a loop switch, and the third static contact 31b and the fourth static contact 32b are used to connect a power supply and a load respectively, and can work independently.

[0078] In the present application, one of the first static contact 31a and the second static contact 32a is electrically connected to one of the third static contact 31b and the fourth static contact 32b to achieve the series connection of the first switch unit L1 and the second switch unit L2; and the first moving contact 40a, the first static contact 31a, the second static contact 32a, the second moving contact 40b, the third static contact 31b and the fourth static contact 32b form a new dual-breakpoint loop switch with synchronous closing and opening functions. It needs to be noted that the static contact in the third switch unit L3 is further electrically connected to the static contact of the second switch unit L2. That is, the static contacts of the first switch unit L1, the second switch unit L2 and the third switch unit L3 are connected in series, which also belong to the protection scope of the present application, and have the structural characteristics of the electrical connection of the static contacts of the two switch units.

[0079] Referring to FIGS. 18a-22, the contact module of each switch unit in the present embodiment includes two moving contacts and four static contacts, wherein one moving contact and two static contacts are combined to form a switch loop, and two switch loops are formed in each switch unit. The driving mechanism of the contact module drives two moving contacts to move at the same time, so that each moving contact cooperates with the corresponding two static contacts, such that the corresponding switch loop is switched on and off. Preferably, in the present embodiment, the driving mechanism drives the two moving contacts to slide linearly at the same time, so that each moving contact cooperates with the corresponding two static contacts.

[0080] In the present embodiment, the first contact module in the first housing 1a of the first switch unit L1 includes two first moving contacts 40a, two first static contacts 31a and two second static contacts 32a, wherein two independent loop switches are formed in the first housing 1a of the first switch unit L1, one loop switch is disposed on a first side of the first housing 1a, the other loop switch is disposed on a second side of the first housing 1a, and the two loop switches in the first housing 1a are disposed symmetrically. Similarly, the second contact module in the second housing 1b of the second switch unit L2 includes two second moving contacts 40b, two third static contacts 31b and two fourth static contacts 32b, wherein two independent loop switches are formed in the second housing 1b of the second switch unit L2, one loop switch is disposed on a first side of the second housing 1b, the other loop switch is disposed on a second side of the second housing 1b, and the two loop switches in the second housing 1b are disposed symmetrically. Of course, as other embodiments, only one first moving contact 40a, one first static contact 31a and one second static contact 32a may be disposed in the first switch unit L1.

[0081] In the present embodiment, the loop switch in the at least one first switch unit L1 and the loop switch in the second switch unit L2 are connected in series to form a dual-breakpoint loop switch. For example, when two first moving contacts 40a, two first static contacts 31a, two second static contacts 32a, two second moving contacts 40b, two third static contacts 31b, and two fourth static contacts 32b are disposed on opposite sides in groups, the static contacts on both sides are connected in series, that is, the two loop switches in the first switch unit L1 and the two loop switches in the second switch unit L2 are respectively connected in series to form two dual-breakpoint loop switches. In this way, the first switch unit L1 after series connection is combined with the second switch unit L2 to control at least two loops. The static contacts on one side may be connected in series, while the static contacts on the other side may not be connected in series. That is, only one of the two loop switches in the first switch unit L1 is connected in series with one of the two loop switches in the second switch unit L2. In this case, the three loops can be controlled just by combining the first switch unit L1 with the second switch unit L2.

[0082] In the present embodiment, in conjunction with FIG. 18a and FIG. 18b, in the first switch unit L1, one first static contact 31a and one second static contact 32a forming one of the loop switches are located on the first side of the first housing 1a, and one first static contact 31a and one second static contact 32a forming the other loop switch are located on the second side of the first housing 1a; in the second switch unit L2, one third static contact 31b and one fourth static contact 32b forming one of the loop switches are located on the first side of the second housing 1b, and one third static contact 31b and one fourth static contact 32b forming the other loop switch are located on the second side of the second housing 1b; the second housing 1b is disposed below the first housing 1a; the first side of the first housing 1a and the first side of the second housing 1b belong to the same side; and the second side of the first housing 1a and the second side of the second housing 1b belong to the same side.

[0083] Preferably, one of the first static contact 31a and the second static contact 32a located on the first side in the first housing 1a is electrically connected to one of the third static contact 31b and the fourth static contact 32b located on the first side in the second housing 1b; and / or, one of the first static contact 31a and the second static contact 32a located on the second side in the first housing 1a is electrically connected to one of the third static contact 31b and the fourth static contact 32b located on the second side in the second housing 1b. Of course, as other inferior embodiments, one of the first static contact 31a and the second static contact 32a located on the first side in the first housing 1a is electrically connected to one of the third static contact 31b and the fourth static contact 32b located on the second side in the second housing 1b.

[0084] Referring to FIG. 1 and FIG. 2, when the first housing 1a only has one first static contact 31a, one second static contact 32a and one first moving contact 40a inside, and the second housing 1b only has one third static contact 31b, one fourth static contact 32b and one second moving contact 40b inside, the first static contact 31a and the second static contact 32a are preferably disposed on the first side of the first housing 1a of the first switch unit L1, and the third static contact 31b, and the fourth static contact 32b are both disposed on the first side of the second housing 1b of the second switch unit L2; and the first side of the first housing 1a and the first side of the second housing 1b belong to the same side. The second housing 1b is disposed below the first housing 1a, the third static contact 31b is located below the first static contact 31a, and the fourth static contact 32b is located below the second static contact 32a.

[0085] At the same time, as an alternative embodiment, the first static contact 31a and the second static contact 32a are disposed on the first side of the first housing 1a of the first switch unit L1, and the third static contact 31b and the fourth static contact 32b are both disposed on the second side of the second housing 1b of the second switch unit L2. The first side of the first housing 1a and the second side of the second housing 1b belong to different sides, for example, may be opposite sides, or adjacent sides. Regardless of the opposite sides or the adjacent sides, the series connection can be achieved inside the housing through a series conductor, or the series connection can be achieved outside the housing by disposing a wiring portion outside the housing. In the case of series connection in the housing, a corresponding structure support needs to be disposed in the housing to avoid short circuiting.

[0086] Preferably, an electrical connection structure between one of the first static contact 31a and the second static contact 32a and one of the third static contact 31b and the fourth static contact 32b is disposed in the first housing 1a of the first switch unit L1 and the second housing 1b of the second switch unit L2.

[0087] As a specific embodiment, one of the first static contact 31a and the second static contact 32a is electrically connected to one of the third static contact 31b and the fourth static contact 32b through a series conductor 91 penetrating through the first housing 1a to the second housing 1b. Continued to FIG. 18a, the second static contact 32a and the third static contact 31b are electrically connected through the series conductor 91 penetrating through the first housing 1a to the second housing 1b. Continued to FIG. 18b, in the case that the first static contact 31a, the second static contact 32a, the third static contact 31b and the fourth static contact 32b are all located on the same side, the third static contact 31b is located below the first static contact 31a, and the fourth static contact 32b is located below the second static contact 32a, after the second static contact 32a is connected in series with the third static contact 31b, a current I1 enters from the first static contact 31a, flows through the second static contact 32a and the third static contact 31b in sequence, and finally flows out of the fourth static contact 32b. Therefore, the wiring direction can be set with reference to a direction of the arrow in the figure, that is, an incoming direction enters from one end on this side and exits from the other end.

[0088] Specifically, referring to FIG. 19, a penetrating through hole 123 is formed in the first side of the first housing 1a and / or the second housing 1b, and the series conductor 91 penetrates the through hole 123 through the first housing 1a to the second housing 1b, and is connected to the third static contact 31b. In general cases, the second housing 1b is provided with an upper cover. Then, the two housings are both provided with corresponding through holes 123. If the second housing 1b is not provided with an upper cover or there is only one partition board between the first housing 1a and the second housing 1b, there is only one through hole 123.

[0089] As another specific embodiment, preferably, one of the first static contact 31a and the second static contact 32a and one of the third static contact 31b and the fourth static contact 32b form an integrated structure. Referring to FIG. 20a, the second static contact 32a and the fourth static contact 32b of an integrated structure and penetrate through the first housing 1a to the second housing 1b. When the fourth static contact 32b in the integrated structure is adopted, the assembly process requires the simultaneous assembly of two units, but at the same time, the fourth static contact 32b in the integrated structure reduces the number of product parts and also reduces the assembly procedure. Continued to FIG. 20b, in the case that the first static contact 31a, the second static contact 32a, the third static contact 31b and the fourth static contact 32b are all located on the same side, the third static contact 31b is located below the first static contact 31a, and the fourth static contact 32b is located below the second static contact 32a, after the second static contact 32a is connected in series (formed integrally) with the fourth static contact 32b, a current I1 enters from the first static contact 31a, flows through the second static contact 32a and the fourth static contact 32b in sequence, and finally flows out of the third static contact 31b. Therefore, the wiring direction can be set with reference to a direction of the arrow in the figure, that is, a wiring direction enters from one end on this side and exits from the same end on this side, that is, enters and exits on the same side, or enters and exits on the adjacent side.

[0090] Of course, in the present embodiment, the second static contact 32a and the fourth static contact 32b may also be electrically connected by a series conductor. The connection mode of the series conductors may refer to the connection mode of the second static contact 32a and the third static contact 31b.

[0091] In the above embodiment, the series connection mode between the static contacts is implemented in the housing, but is not limited to the mode implemented in the housing. That is, an electrical connection structure between one of the first static contact 31a and the second static contact 32a and one of the third static contact 31b and the fourth static contact 32b is located outside the first housing 1a of the first switch unit L1 and the second housing 1b of the second switch unit L2. For example, as shown in FIG. 21, the second static contact 32a is provided with a second wiring portion 3212 penetrating out of the first housing 1a of the first switch unit L1; the first static contact 31a may be provided with a first external wire 3111 connected to an external line; the third static contact 31b is provided with a third wiring portion 3113 penetrating out of the second housing 1b of the second switch unit L2; and the second wiring portion 3212 and the third wiring portion 3113 are electrically connected outside the first housing 1a and the second housing 1b.

[0092] In another embodiment, as shown in FIG. 21, the second static contact 32a is provided with a second wiring portion 3212 penetrating out of the first housing 1a of the first switch unit L1; the fourth static contact 31a is provided with a fourth wiring portion 3214 penetrating out of the second housing 1b of the second switch unit L2; and the second wiring portion 3212 and the third wiring portion 3314 are electrically connected outside the first housing 1a and the second housing 1b.

[0093] Further, referring to FIG. 1, the driving mechanism of the switch unit in the present embodiment includes a rotating transmission shaft 70, a rotating frame 60 fixed on the transmission shaft 70, and a first link 5a and a second link 5b hinged with both ends of the rotating frame 60. The first link 5a and the second link 5b are hinged with the two moving contacts, respectively. The transmission shaft 70 rotates to drive the two moving contacts through the first link 5a and the second link 5b to slide linearly along the corresponding sliding rails 103a, so that each moving contact 40 cooperates with the corresponding two static contacts. In the present embodiment, the arc-extinguishing chambers 20 are provided on both sides of the sliding rails 103a, respectively. Compared with the traditional switch unit structure in which the arc-extinguishing chambers are located under a square switch unit housing structure, this arc-extinguishing chamber structure is rectangular and has a large arc-extinguishing chamber structure.

[0094] Continued to FIG. 18a and FIG. 18b, as a specific series connection mode, the first static contact 31a and the second static contact 32a are disposed on the first side of the first housing 1a of the first switch unit L1, and the third static contact 31b and the fourth static contact 32b are both disposed on the first side of the second housing 1b of the second switch unit L2; the first side of the first housing 1a and the first side of the second housing 1b are the same side, the third static contact 31b is disposed below the first static contact 31a, and the fourth static contact 32b is disposed below the second static contact 32a; and the second static contact 32a is electrically connected to the third static contact 31b to achieve the series connection between the first switch unit L1 and the second switch unit L2, and a wire incoming end of the dual-breakpoint switch after series connection is disposed at one end of the first static contact 31a, and the wire incoming end is disposed at one end of the fourth static contact 32b. That is, after series connection, the original wiring direction has not changed, but is still in the opposite side position, so that the wiring direction of the existing switch unit has not been changed, ensuring the wiring applicability of the switch unit.

[0095] Continued to FIG. 20a and FIG. 20b, as a series connection mode, the first static contact 31a, the second static contact 32a, the third static contact 31b, and the fourth static contact 32b are all disposed on the first side of the rotary isolation switch and close to both ends on this side; the third static contact 31b is disposed below the first static contact 31a, and the fourth static contact 32b is disposed below the second static contact 32a; the second static contact 32a is electrically connected to the fourth static contact 32b to achieve the series connection between the first switch unit L1 and the second switch unit L2; the wire incoming end is disposed at one end of the first static contact 31a, and the wiring end is disposed at one end of the second static contact 31b. That is, the wire incoming end and the wiring end are located at the same end on the first side, or may also be located on adjacent sides, so the wiring mode is more flexible.

[0096] Therefore, the first moving contact 40a, the first static contact 31a, the second static contact 32a, the second moving contact 40b, the third static contact 31b and the fourth static contact 32b in the present embodiment form a dual-breakpoint loop switch. Of course, under certain current and voltage conditions, if the switch units on two layers cannot meet the disconnection requirements, the third switch units or the fourth switch units or switch units on more layers may also be continuously connected in series.

[0097] Under some application conditions, the operating parameters of the switch units of the rotary isolation switch may be the same or different, and the operation in a wider range of parameters can be achieved by means of multi-layer series connection.

[0098] In order to achieve specific wiring position requirements or specific operating parameters, the first switch unit L1 and the second switch unit L2 may be two adjacent switch units, or two switch units separated by at least one layer.Embodiment 6

[0099] FIG. 22 shows a schematic diagram of an internal structure of a rotary isolation switch. The rotary isolation switch includes a plurality of switch units, such as a switch unit L1 and a switch unit L2. The present embodiment is illustrated by taking the switch unit L1 as an example. In the present embodiment, the switch unit L1 includes a first contact module and a second contact module at the same time. The first contact module includes a first moving contact 40a, a first static contact 31 and a second static contact 32, wherein the first static contact 31, the second static contact 32 and the first moving contact 40a form a first loop switch, and the first moving contact 40a is used to be in contact with or disengaged from the first static contact 31 and the second static contact 32 at the same time, such that the first static contact 31 and the second static contact 32 are switched on and off. The second contact module includes a second moving contact 40b, a third static contact 33 and a fourth static contact 34, wherein the third static contact 33, the fourth static contact 34 and the second moving contact 40b form a second loop switch, and the second moving contact 40a is used to be in contact with or disengaged from the third static contact 33 and the fourth static contact 34 at the same time, such that the third static contact 33 and the fourth static contact 34 are switched on and off. It can thus be seen that the first loop switch and the second loop switch are two independent loop switches, and the first contact module or the second contact module can function as a loop switch separately.

[0100] In the present embodiment, one of the first static contact 31 and the second static contact 32 is electrically connected to one of the third static contact 33 and the fourth static contact 34, such that the first loop switch is connected in series with the second loop switch. The first loop switch and the second loop switch may be connected in series to form a dual-breakpoint switch structure to control a loop to be switched on or off.

[0101] In the present embodiment, the first static contact 31 and the second static contact 32 are disposed on the first side of the housing 1 of the first switch unit L1, and the third static contact 33 and the fourth static contact 34 are disposed on the second side of the housing 1. The first side and the second side may be opposite sides or adjacent sides. Of course, in some possible embodiments, the first side and the second side may also be the same side (i.e., the first contact module and the second contact module are disposed on the same side in sequence).

[0102] Continued to FIG. 22, taking the first side and the second side being opposite sides as an example, the second static contact 32 and the fourth static contact 34 are electrically connected to achieve the series connection of the first contact module and the second contact module. The first static contact 31 is opposite to the third static contact 33, and the second static contact 32 is opposite to the fourth static contact 34. According to a current direction shown by the arrow in FIG. 22, in the case that the second static contact 32 and the fourth static contact 34 are electrically connected to achieve series connection, the external wire is disposed on the first static contact 31 and the third static contact 33, such that the power supply and the load can be connected on the same side.

[0103] As an alternative embodiment, the second static contact 32 is electrically connected to the third static contact 33. At this time, the external wire is disposed on the first static contact 31 and the fourth static contact 34, the power supply is connected from one side, the load is connected on the other side, and the wiring directions of the power supply and the load are opposite.

[0104] As shown in FIG. 22 and in conjunction with FIG. 1, the electrical connection structure between the first contact module and the second contact module is disposed in the housing 10. Specifically, the second static contact 32 of the first contact module and the third static contact 33 of the second contact module are connected by means of a connecting conductor 91 disposed in the housing 10. In order to ensure the reliability of the connecting conductor 91, an auxiliary structure, such as a wiring slot, a wire clamp or other structures, of the fixed connecting conductor 91 can be disposed in the housing 10.

[0105] As shown in FIG. 23, the second static contact and the third static contact 33 may also be of an integrated structure with a connection portion 91a, and the integrated structure is disposed inside the housing 10.

[0106] It should be explained that, in the description of the present invention, the terms such as "up", "down", "left", "right", "inner" and "outer" indicating the directional or positional relations on the basis of the directional or positional relations shown in the drawings are only used for conveniently describing the present invention and simplifying the description, not indicate or imply that the referred devices or elements must have a specific orientation and be configured and operated in a specific direction; therefore, they cannot be construed as a limitation on the present invention.

[0107] We have made further detailed description of the present invention mentioned above in combination with specific preferred embodiments, but it is not deemed that the specific embodiments of the present invention is only limited to these descriptions. A person skilled in the art can also, without departing from the concept of the present invention, make several simple deductions or substitutions, which all be deemed to fall within the protection scope of the present invention.

Claims

1. A switch unit, comprising a housing (10), a moving contact module, and a static contact module, wherein the moving contact module comprises a driving mechanism and at least two moving contacts (40) independent of each other, and the static contact module comprises at least four static contacts (30); and every two static contacts (30) are in contact with or separated from one moving contact (40), and the two static contacts (30) and the moving contact (40) form a loop switch.

2. The switch unit according to claim 1, wherein the moving contact module (4) comprises a first moving contact (41) and a second moving contact (42) which are independent of each other; the static contact module (3) comprises a first static contact (31), a second static contact (32), a third static contact (33) and a fourth static contact (34); the first static contact (31) and the second static contact (32) form a loop switch with the first moving contact (41); the third static contact (33) and the fourth static contact (34) form a loop switch with the second moving contact (42); the first static contact (31) and the second static contact (32) are disposed at intervals on a first side of the housing (10), and the third static contact (33) and the fourth static contact (34) are disposed at intervals on a second side opposite the first side; and the first moving contact (41) and the second moving contact (42) are disposed between the first side and the second side.

3. The switch unit according to claim 2, wherein the driving mechanism comprises a rotating transmission shaft (70) and a transmission mechanism in transmission connection with the transmission shaft (70); the first moving contact (41) and the second moving contact (42) are connected to an output end of the transmission mechanism, respectively; and one transmission shaft (70) rotates to drive the first moving contact (41) and the second moving contact (42) to slide linearly.

4. The switch unit according to claim 3, wherein the transmission mechanism comprises a rotating frame (60) fixed on the transmission shaft (70), and a first link (5a) and a second link (5b) hinged with the rotating frame (60) respectively; both ends of the rotating frame (60) protrude out of the transmission shaft (70) in a radial direction; and the first moving contact (41) and the second moving contact (42) are hinged with the output ends of the first link (5a) and the second link (5b), respectively.

5. The switch unit according to claim 4, wherein the switch unit is provided with a limiting structure to limit a movement route of the first moving contact (41) and the second moving contact (42), so that the first moving contact and the second moving contact are driven by the first link (5a) and the second link (5b) to slide along a preset route, so as to be in contact with and separated from the first static contact (31), the second static contact (32), the third static contact (33) and the fourth static contact (34).

6. The switch unit according to claim 5, wherein the limiting structure comprises a first sliding rail (103a) which is disposed on the housing (10) and extends from the rotating frame (60) to the first static contact (31) and the second static contact (32), a second sliding rail (103b) which extends toward the third static contact (33) and the fourth static contact (34), a first sliding block (802a) disposed on the first sliding rail (103a), and a second sliding block (802b) disposed on the second sliding rail (103b); and the first sliding block (802a) and the second sliding block (802b) are connected to the first moving contact (41) and the second moving contact (42), respectively.

7. The switch unit according to claim 4, wherein a first driving shaft (603) and a second driving shaft (604) are disposed on both radial sides of the rotating frame (60), respectively; a first driving hole (501a) is provided in a first end of the first link (5a); a second driving hole (501b) is provided in a first end of the second link (5b); the rotating frame (60) is hinged with the first driving hole (501a) of the first link (5a) and the second driving hole (501b) of the second link (5b) through the first driving shaft (603) and the second driving shaft (604), respectively; a first connection hole (502a) and a second connection hole (502b) are provided in the second end of the first link (5a) and the second end of the second link (5b); and the first link (5a) and the second link (5b) are hinged with the first moving contact (41) and the second moving contact (42) through the first connection hole (502a) and the second connection hole (502b), respectively.

8. The switch unit according to claim 2, wherein the driving mechanism comprises a supporting member (80) and sliding rails (103); the moving contact (40) is mounted on the supporting member (80) which is in sliding fit with the sliding rails (103); the supporting member (80) comprises a sliding block (802) in sliding connection with the sliding rails (103), a contact connection portion (803) fixedly connected to the moving contact (40), and a transmission connection portion (801) for transmission connection with the driving mechanism; the supporting member (80) is formed integrally; the contact connection portion (803) is disposed on the sliding block (802); and the transmission connection portion (801) is disposed on the contact connection portion (803).

9. The switch unit according to claim 3, wherein the housing (10) is rectangular as a whole; the first static contact (31) and the second static contact (32) are disposed at intervals on the left side, and close to a left side wall of the housing (10); the third static contact (33) and the fourth static contact (34) are disposed on the right side, and close to a right side wall of the housing (10); the transmission shaft (70) of the driving mechanism is located in the center of the housing (10); the first moving contact (41) is located between the transmission shaft (70) and the left side wall; a first sliding rail (103a) is disposed between the transmission shaft (70) and the left side wall; arc-extinguishing chambers (20) are disposed on both sides of the first sliding rail (103a), i.e., a sliding trajectory of the first moving contact (41); the second moving contact (42) is located between the transmission shaft (70) and the right side wall; a second sliding rail (103b) is disposed between the transmission shaft (70) and the right side wall; and arc-extinguishing chambers (20) are disposed on both sides of the second sliding rail (103b), i.e., a sliding trajectory of the second moving contact (42).

10. The switch unit according to claim 9, wherein the arc-extinguishing chambers (20) on both sides of the first sliding rail (103a) form a rectangular shape, wherein the length of an arc inlet side is the same as the length of the corresponding first sliding rail (103a); the arc-extinguishing chambers (20) on both sides of the second sliding rail (103b) form a rectangular shape, wherein the length of an arc inlet side is the same as the length of the corresponding second sliding rail (103b).

11. The switch unit according to claim 3, wherein the driving mechanism comprises a rotating frame (60) fixed on the transmission shaft (70), a first link (5a) and a plurality of third links (5c); a first end of the first link (5a) is in hinged connection with a first end of the rotating frame (60); a second end of the first link (5a) is hinged or fixedly connected with one of the third links (5c), the remaining third links (5c) are hinged or fixedly connected in sequence, and the last third link (5c) is provided with a driving connection portion so as to connect the first moving contact (41); and the driving mechanism further comprises a second link (5b) and a plurality of fourth links (5d); a first end of the second link (5b) is in hinged connection with a second end of the rotating frame (60); a second end of the second link (5b) is hinged or fixedly connected with one of the fourth links (5d), the remaining fourth links (5d) are hinged or fixedly connected in sequence, and the last fourth link (5d) is provided with a driving connection portion so as to connect the second moving contact (42).

12. A rotary isolation switch, comprising at least two stacked switch units according to any of claims 1 to 11.

13. The rotary isolation switch according to claim 12, wherein at least one loop switch of one switch unit is connected in series with at least one loop switch of another adjacent switch unit.

14. A rotary isolation switch, comprising at least two stacked switch units according to any of claims 2 to 12, wherein the two switch units are a first switch unit (L1) and a second switch unit (L2), respectively; one of the first static contact (31) and the second static contact (32) in the first housing (1a) of the first switch unit (L1) is electrically connected to one of the first static contact (31) and the second static contact (32) in the second housing (1b) of the second switch unit (L2); or one of the first static contact (31) and the second static contact (32) in the first housing (1a) of the first switch unit (L1) is electrically connected to one of the third static contact (33) and the fourth static contact (34) in the second housing (1b) of the second switch unit (L2).

15. The rotary isolation switch according to claim 14, wherein an electrical connection structure between the first switch unit (L1) and the second switch unit (L2) is disposed in the first housing (1a) of the first switch unit (L1) and the second housing (1b) of the second switch unit (L2); the first housing (1a) and / or the second housing (1b) are / is provided with a penetrating through hole (123); and the electrical connection structure penetrates the first housing (1a) through the through hole (123) to the second housing (1b).

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