Switching device

Abstract

A switching device comprises a shell, a control circuit board and at least one contact unit, each contact unit comprises a pair of wiring assemblies, a moving contact assembly and two static contacts, the control circuit board and the contact units are arranged in the first direction, each contact unit further comprises a current detection device, and the current detection devices are arranged in the third direction. The current detection device is arranged between one static contact and the adjacent wiring assembly, the current detection device is connected to the adjacent static contact or the moving contact assembly at the closing position and is connected between the control circuit board and the current detection device, and the plane where the connecting circuit board is located is parallel to the first direction and the third direction at the same time. The first direction, the second direction and the third direction are parallel to one another. The current detection device is directly connected to the adjacent static contact or the moving contact assembly at the switching-on position, the connecting circuit board does not need to penetrate through the contact unit to be connected with the control circuit board, interference on the internal structure of the contact unit is small, a modular structure is easy to form, and the assembly difficulty is reduced.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to a switch device. Background Art

[0002] A switch device is a device for controlling the on and off of a circuit. The switch device includes a control circuit board and at least one contact unit. Each contact unit is usually equipped with a current detection device, and the current detection device transmits the detected current signal to the control signal. However, the existing switch device has the following defects: first, the control circuit board is usually stacked on a contact unit or separately arranged in an independent module stacked with the contact unit. The wire connected between the current detection device and the control circuit board or the connecting circuit board needs to pass through at least one contact unit, which is not only cumbersome to connect, but also causes interference to the internal structure of the contact unit; second, the current detection device usually adopts current transformer sampling, so that the main circuit of each contact unit passes through the center hole of the current transformer, and its wiring is complicated, which is not conducive to forming a modular structure and causes cumbersome assembly. Summary of the invention

[0003] The object of the present invention is to overcome at least one defect of the prior art and provide a switch device with simple structure and high reliability.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The present invention provides a switch device, comprising a housing, a control circuit board and at least one contact unit are arranged in the housing, the contact unit comprises a pair of wiring assemblies, a contact mechanism is arranged between the pair of wiring assemblies, the contact mechanism comprises a moving contact assembly and two stationary contacts, each stationary contact is electrically connected to an adjacent wiring assembly,

[0006] The control circuit board and the contact unit are arranged along the first direction, and each contact unit also includes a current detection device. In the third direction, the current detection device is arranged between a static contact and an adjacent wiring assembly, and the current detection device is connected to an adjacent static contact or a moving contact assembly in a closed position. The connecting circuit board connected between the control circuit board and the current detection device is used to transmit signals, and the plane where the connecting circuit board is located is parallel to the first direction and the third direction at the same time, and the first direction, the second direction and the third direction are parallel to each other.

[0007] Preferably, each contact unit comprises a shell, the contact mechanism is arranged inside the shell, and the current detection device, the connecting circuit board and the control circuit board are arranged outside the shell.

[0008] Preferably, at least two contact units are included, two adjacent contact units are arranged side by side in the second direction, and the control circuit board spans one or two contact units along the second direction.

[0009] Preferably, a pair of wiring components of each contact unit are arranged in the housing at intervals along the third direction, and the housing is located between the pair of wiring components.

[0010] Preferably, at least one partition is provided in the housing, and the partition divides the space in the housing into at least two assembly cavities, each assembly cavity is provided with a contact unit, and the control circuit board spans one or two assembly cavities along the second direction.

[0011] Preferably, it comprises a control circuit board and a contact unit, wherein the control circuit board and the contact unit are stacked in the housing in the second direction.

[0012] Preferably, the current detection device is a Hall element, the collection end of the Hall element is connected to a static contact through the side wall of the shell, a transmission circuit board is connected between the Hall element and the connecting circuit board, and the transmission circuit board is located outside the shell; alternatively, the current detection device is a manganese copper shunt, the manganese copper shunt is connected to one of the static contacts, and the signal end of the manganese copper shunt is connected to the connecting circuit board through the side wall of the shell.

[0013] Preferably, the connecting circuit board is stacked with the contact mechanism in the second direction, and the plane where the connecting circuit board is located is parallel to the first direction and the third direction.

[0014] Preferably, the connection circuit board and / or the control circuit board is provided with a signal port, and a socket is provided on the side wall of the housing corresponding to the signal port.

[0015] Preferably, each contact system further includes two arc extinguishing systems, and each arc extinguishing system is correspondingly arranged between the contact mechanism and a wiring assembly.

[0016] Preferably, the static contact comprises a conductive plate, one end of which is provided with a static contact portion, and the other end of the conductive plate extends along a third direction and is correspondingly connected to a wiring assembly.

[0017] Preferably, the control circuit board is also connected to an electromagnetic operating system, and the electromagnetic operating system and the control circuit board are arranged side by side in the second direction or the third direction. The electromagnetic operating system includes a coil assembly and a moving assembly, and the moving assembly is connected to the moving contact assembly of at least one contact unit. The coil assembly drives the moving assembly to move between the first position and the second position to drive the moving contact assembly to move along the first direction.

[0018] In the switch device of the present invention, the control circuit board and the contact unit are no longer stacked, and the current detection device is directly connected to the adjacent static contact or the moving contact assembly in the closed position. The connection circuit board does not need to pass through the contact unit to connect with the control circuit board, which simplifies the wiring method of the current detection device, the control circuit board and each contact unit, has less interference with the internal structure of the contact unit, is easy to form a modular structure, and is conducive to reducing the difficulty of assembly.

[0019] In particular, the contact unit is provided with a housing, and the current detection device and the control circuit board are both located outside the housing, which is further conducive to forming a modular structure and avoiding interference of the connection circuit board to the interior of the contact unit.

[0020] In addition, the current detection device can be a manganese copper shunt or a Hall element, and is respectively connected to the conductive plate of the static contact in close proximity, making wiring convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the structure of the switch device of the present invention after the cover is removed;

[0022] Figure 2 It is a structural schematic diagram of a control circuit board and a connection circuit board in the present invention;

[0023] Figure 3 It is a schematic diagram of the coordination between the control circuit board and the electromagnetic operating system in the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the contact unit and the manganese-copper shunt in the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the contact unit and the Hall element in the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the contact unit and the Hall element in the present invention (with the transmission circuit board removed);

[0027] Figure 7 It is a schematic diagram of the coordination between the Hall element and the connection circuit board in the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of the housing after the Hall element is removed in the present invention;

[0029] Reference numerals:

[0030] 1-housing, 11-base, 2-contact unit, 21-shell, 211-linkage slot, 218-magnetic plate mounting slot, 2191-first positioning hole, 2192-second positioning hole, 220-moving contact assembly, 2211-linkage shaft, 2231-conductive plate, 232-magnetic plate, 233-permanent magnet, 24-wiring assembly, 3-electromagnetic operating system, 30-operating member, 37-driving rod, 4-linkage plate, 511-transmission circuit board, 52-manganese copper shunt, 6-control circuit board, 60-signal port, 61-distribution circuit board, 63-connection circuit board. DETAILED DESCRIPTION

[0031] The following is a further description of the specific implementation of the switch device of the present invention in conjunction with the embodiments given in the accompanying drawings. The switch device of the present invention is not limited to the description of the following embodiments.

[0032] like Figure 1 As shown, the switch device includes a shell 1, an electromagnetic operating system 3 and at least one contact unit 2 are arranged in the shell 1, the electromagnetic operating system 3 is connected to a control circuit board 6 arranged in the shell 1, the control circuit board 6 is provided with a controller for controlling the electromagnetic operating system 3, and the electromagnetic operating system 3 drives the contact unit 2 to open and close, that is, when there is one contact unit 2 arranged in the shell 1, the electromagnetic operating system 3 directly or indirectly drives the contact unit 2, when at least two contact units 2 are arranged in the shell 1, the electromagnetic operating system 3 is directly or indirectly driven and connected to one of the contact units 2, and two adjacent contact units 2 are linked and connected so as to be indirectly driven by the electromagnetic operating system 3, thereby realizing synchronous opening and closing of multiple contact units 2.

[0033] Specifically, the electromagnetic operating system 3 includes a coil assembly and a moving assembly, and the coil assembly drives the moving assembly to move between a first position and a second position; each contact unit 2 includes at least a pair of wiring assemblies 24 and a contact mechanism, the contact mechanism is arranged between the pair of wiring assemblies 24, the contact mechanism includes a moving contact assembly 220 and two static contacts, the moving contact assembly 220 of at least one contact unit 2 is directly or indirectly driven and connected to the moving assembly, and the moving contact assemblies 220 of two adjacent contact units 2 are linked and connected, and the driving method adopts the existing technology; the moving contact assembly 220 includes a contact support and a moving contact bridge arranged on the contact support, the moving assembly is directly or indirectly driven and connected to the contact support, and the two adjacent moving contact assemblies 220 are linked and connected through the contact support, and a moving contact part is respectively arranged at both ends of the moving contact bridge, each moving contact part is respectively matched with the static contact part of a static contact, and each static contact is respectively connected to an adjacent wiring assembly 24, one wiring assembly 24 is used for incoming lines, and the other wiring assembly 24 is used for outgoing lines.

[0034] Furthermore, the contact unit 2 also includes two arc extinguishing systems, each arc extinguishing system is arranged on one side of the contact mechanism, and is used to extinguish the arc generated when the contact mechanism is disconnected. In addition, the contact unit 2 may also include a current detection device, which is connected to the main circuit of each contact unit 2, and the current detection device is connected to the control circuit board 6 for feeding back the collected current signal.

[0035] For the convenience of description, Figure 1 , 2 As shown, in the electromagnetic operating system 3, the moving direction of the moving component is the first direction, that is, Figure 1 The direction of the middle Y axis is the first direction, and the two directions perpendicular to the first direction are the second direction and the third direction. The second direction and the third direction are perpendicular to each other. Figure 1 The direction of the X-axis is taken as the second direction, and the direction of the Z-axis is taken as the third direction. When at least two contact units 2 are arranged in the housing 1, two adjacent contact units 2 are arranged in parallel along the second direction, and a pair of wiring components 24 in each contact unit 2 are arranged at intervals along the third direction, that is, the connecting line between the pair of wiring components 24 is parallel to the third direction.

[0036] The improvement of the present application is that the control circuit board 6 and the contact unit 2 are arranged along the first direction, and each contact unit 2 also includes a current detection device. In the third direction, the current detection device is arranged between a static contact and an adjacent wiring assembly 24, and the current detection device is connected to an adjacent static contact or a moving contact assembly 220 in the closed position. The connecting circuit board 63 connected between the control circuit board 6 and the current detection device is used to transmit signals, and the plane of the connecting circuit board 63 is parallel to both the first direction and the third direction.

[0037] In this way, the control circuit board 6 and the contact unit 2 are no longer stacked, the current detection device is directly connected to the adjacent static contact or the moving contact assembly 220 in the closed position, and the connecting circuit board 63 does not need to pass through the contact unit 2 to connect with the control circuit board 6, which simplifies the wiring method between the current detection device and the control circuit board 6 and each contact unit 2, has less interference with the internal structure of the contact unit 2, is easy to form a modular structure, and helps to reduce the difficulty of assembly.

[0038] Further, such as Figure 4 As shown, the current detection device can be a manganese copper shunt 52. Preferably, the manganese copper shunt 52 is connected to the conductive plate 2231 of one of the static contacts, and the signal end of the manganese copper shunt 52 is connected to the connecting circuit board 63, or, as shown in FIG. Figure 5-8As shown, the current detection device is a Hall element, the collection end of the Hall element is connected to a static contact, the Hall element is connected to a transmission circuit board 511, and the transmission circuit board 511 is connected to the connection circuit board 63 for signal transmission. Of course, the manganese bronze shunt 52 and the collection end of the Hall element can be connected to the moving contact assembly 220 in the closed position, that is, connected to the moving contact bridge in the closed position.

[0039] Further, such as Figure 2-8 As shown, each contact unit 2 also includes a shell 21, wherein the contact mechanism is arranged in the shell 21, and the current detection device, the connecting circuit board 63 and the control circuit board 6 are all located outside the shell 21 of each contact unit 2, which is further conducive to forming a modular structure and avoiding interference of the connecting circuit board 63 to the interior of the contact unit 2.

[0040] Combination Figure 1-8 A specific embodiment of a switch device is provided.

[0041] like Figure 1 As shown, the switch device includes a housing 1, in which an electromagnetic operating system 3 and at least one contact unit 2 are arranged, wherein the electromagnetic operating system 3 and the contact unit 2 are arranged in the housing 1 along a first direction, when there are at least two contact units 2 in the housing 1, the two contact units 2 are arranged in parallel in the second direction, in this embodiment, four contact units 2 arranged in parallel in the second direction are arranged in the housing 1, each contact unit 2 includes a pair of wiring components 24, a contact mechanism and two arc extinguishing systems, wherein a pair of wiring components 24 are arranged at intervals in a third direction, the contact mechanism is arranged between a pair of wiring components 24, and an arc extinguishing system is arranged between the contact mechanism and a wiring component 24, and the arc extinguishing system cooperates to extinguish the arc generated when the contact mechanism is opened.

[0042] like Figure 1As shown, the two ends of the shell 1 serve as wiring terminals respectively, and the connecting line between the two wiring terminals is parallel to the third direction. The middle part of the shell 1 between the two wiring terminals protrudes outward along the first direction to form an operating end, and the operating end is provided with a driving hole. The shell 1 includes a base 11 and a cover body, wherein the cover body covers the base 11 in the first direction, and the driving hole is opened on the cover body. Three partitions are arranged in the base 11, and two adjacent partitions are arranged at intervals in the second direction. The space in the base 11 is divided into four assembly cavities by the partitions, and a contact unit 2 is arranged in each assembly cavity. The same end of all the assembly cavities corresponds to forming a wiring cavity, and the wiring cavity is provided with a wiring port; the electromagnetic operating system 3 and the control circuit board 6 are arranged between the base 11 and the cover body, that is, between the contact unit 2 and the cover body in the first direction. The electromagnetic operating system 3 and the control circuit board 6 correspond to the inside of the operating end of the shell 1, and an avoidance gap is opened at the edge of each partition close to the electromagnetic operating system 3 to avoid interfering with the action of the electromagnetic operating system 3.

[0043] like Figure 1-3 As shown, the control circuit board 6 and the electromagnetic operating system 3 are arranged side by side in the second direction or the third direction. In particular, when the housing 1 is provided with at least two contact units 2, the control circuit board 6 spans one or two contact units 2 along the second direction. Specifically, when two contact units 2 are provided in the housing 1, the control circuit board 6 spans all the contact units 2 in the second direction. When three or more contact units are provided in the housing 1, the control circuit board 6 spans one or two of the contact units 2 (assembly cavities), preferably spans one or two contact units 2 (assembly cavities) located in the middle position.

[0044] Preferably, the control circuit board 6 is divided into at least two sub-circuit boards 61, and the two sub-circuit boards 61 are respectively located on opposite sides of the electromagnetic operating system 3, or the two sub-circuit boards 61 are respectively located on the same side of the electromagnetic operating system 3, which is conducive to the dispersed assembly of the control circuit board 6 to meet the switching device with different needs and has strong applicability.

[0045] Specific as Figure 3As shown, when two sub-circuit boards 61 are respectively located on opposite sides of the electromagnetic operating system 3, if a contact unit 2 is provided in the shell 1, the plane where each sub-circuit board 61 is located is parallel to the first direction and the third direction at the same time. At this time, the sub-circuit board 61 is in contact with the inner wall of the shell 1 in the second direction, so that the space occupied by the sub-circuit board 61 in the second direction can be avoided, which is conducive to reducing the thickness of the switch device; if at least two contact units 2 are provided in the shell 1, preferably, the plane where each sub-circuit board 61 is located is parallel to the first direction and the second direction at the same time. At this time, each sub-circuit board 61 can cross at least one or two contact units 2 in the second direction, that is, when two contact units 2 are provided in the shell 1, the sub-circuit board 61 crosses all the contact units 2, and when three or more contact units 2 are provided in the shell, the sub-circuit board 61 crosses one or two of the contact units 2, so as to facilitate the wiring of the sub-circuit board 61 with each contact unit 2.

[0046] like Figure 1 , 2 As shown, in the third direction, two sub-circuit boards 61 can also be arranged on the same side of the electromagnetic operating system 3, and the two sub-circuit boards 61 are connected at an angle. In the figure, the two sub-circuit boards 61 are connected vertically to each other, one of the sub-circuit boards 61 is closer to the electromagnetic operating system 3, and its plane is parallel to the first direction and the second direction at the same time, and the plane of the other sub-circuit board 61 is parallel to the second direction and the third direction at the same time. Such a structure is suitable for at least two contact units 2 to be arranged in the housing 1. Of course, the control circuit board 6 can also be an integrated structure, and its assembly position with the electromagnetic operating system 3 can refer to the setting position of any sub-circuit board 61, but it may occupy more space in the housing 1. In addition, a signal port 60 can be arranged on the control circuit board 6, and a socket is opened in the housing 1 area corresponding to the signal port 60. The signal port 60 and the socket can be located on the operating end of the housing 1. Of course, the signal port 60 and the socket can also be arranged at other positions of the housing 1.

[0047] like Figure 1 , 2As shown, the electromagnetic operating system 3 includes a coil assembly and a moving assembly, wherein the coil assembly is connected to a control circuit board 6 disposed in the housing 1, and a control signal is output by a controller of the control circuit board 6, and the moving assembly is driven to move between a first position and a second position by controlling the current of the coil assembly, and the coil assembly includes a coil skeleton, and a magnet is respectively disposed at the opposite ends of the coil skeleton, and a coil is wound in the middle of the coil skeleton, and the coil is connected to the control circuit board 6, and the controller of the control circuit board 6 controls whether the coil is energized and the direction of the current; a moving assembly is slidably mounted in the middle of the coil skeleton, and the coil assembly drives The moving component is attracted by a magnet at a first position and by another magnet at a second position. Specifically, the moving component includes a moving iron core, wherein the moving iron core is slidably arranged in the middle of the coil frame, that is, the moving iron core is located between the two magnets. When the power is on, the coil drives the moving iron core to move between the first position and the second position. The moving iron core is attracted by a magnet at the first position and by another magnet at the second position. At least one end of a driving rod 37 connected to the moving iron core passes through the magnet and extends out of the coil frame, and is directly or indirectly driven and connected to a moving contact assembly 220 of at least one contact unit 2 by the driving rod 37.

[0048] Furthermore, the moving component also includes a driving rod 37, which is connected to the moving iron core and driven by the moving iron core to move axially along the coil frame, and at least one end of the driving rod 37 passes through one of the magnets and extends out of the coil frame, and is used to connect with the moving contact assembly 220 of at least one contact unit 2, so as to realize the driving of the contact unit 2 by the electromagnetic operating system 3. In this embodiment, when the moving component moves to the first position, the contact mechanism of the contact unit 2 is opened, and when the moving component moves to the second position, the contact mechanism of the contact unit 2 is closed.

[0049] Preferably, the moving component is also connected to an operating member 30, which extends outside the housing 1. The electromagnetic operating system 3 can be operated from the outside through the operating member 30 to move the moving component between the first position and the second position, thereby driving the contact mechanism of the contact unit 2 to open. In this way, the moving component of the electromagnetic operating system 3 can be manually operated and driven by the coil assembly, thereby improving the operational reliability of the switching device.

[0050] In addition, the electromagnetic operating system 3 also includes a yoke, which is arranged around the outer side of the coil frame, and the yoke is provided with a through hole for the driving rod 37 to pass through, and the through hole arranged on the yoke corresponds to the through hole arranged on the magnet; the moving iron core and the driving rod 37 are both made of magnetic conductive material, and the moving iron core and the driving rod 37 can be an integral structure or two separate components. In this embodiment, the driving rod 37 and the moving iron core are two separate components, and the connection method between the driving rod 37 and the moving iron core, and the connection method between the driving rod 37 and the operating member 30 both adopt the existing technology.

[0051] When the electromagnetic operating system 3 drives more than one contact unit 2, the moving component can be directly driven and connected to one of the contact units 2, that is, the driving connection between the driving rod 37 and the moving contact component 220 of one contact unit 2, and the remaining contact units 2 are connected through linkage, so that the electromagnetic operating system 3 drives at least two contact units 2 to open and close synchronously; preferably, a linkage plate 4 is connected to one end of the moving component, and multiple contact units 2 are respectively linked to the linkage plate 4, and all contact units 2 are driven by the same linkage plate 4, which is beneficial to ensure the synchronization of the actions of the contact units 2.

[0052] In this embodiment, if Figure 2-3 As shown, each contact unit 2 includes a pair of wiring assemblies 24 spaced apart in a third direction, a contact mechanism is arranged between the pair of wiring assemblies 24, the contact mechanism includes a moving contact assembly 220 and two stationary contacts, the moving contact assembly 220 includes a contact support and a moving contact bridge, wherein the moving contact bridge is arranged on the contact support, and the moving trajectory of the moving contact bridge is perpendicular to the connecting line between the pair of connecting line assemblies 24, that is, the central axis of the moving contact bridge is parallel to the third direction, and two moving contact parts are respectively arranged at both ends of the moving contact bridge. The moving contact assembly 220 moves along the first direction under the drive of the moving assembly, so that each moving contact part is respectively matched with the static contact part of a static contact, and each static contact is respectively electrically connected to an adjacent wiring assembly 24.

[0053] like Figure 4-6 As shown, each contact unit 2 further includes a current detection device, which is connected to a control circuit board 6 disposed in the housing 1, wherein the control circuit board 6 and the contact unit 2 are disposed along a first direction, and in a third direction, the current detection device is disposed between a static contact and an adjacent wiring assembly 24, and the current detection device is connected to an adjacent static contact or a moving contact assembly 220 in a closed position, and the current detection device is connected to the control circuit board 6 through a connecting circuit board 63, and the plane where the connecting circuit board 63 is located is parallel to the first direction and the third direction. In this embodiment, the control circuit board 6 and the contact unit 2 are no longer stacked, and the current detection device is directly connected to an adjacent static contact or a moving contact assembly 220 in a closed position, and the connecting circuit board 63 does not need to penetrate the contact unit 2 to connect with the control circuit board 6, which simplifies the wiring method of the current detection device, the control circuit board 6 and each contact unit 2, has less interference with the internal structure of the contact unit 2, and is easy to form a modular structure, which is conducive to reducing the difficulty of assembly.

[0054] Preferably, each contact unit 2 also includes a shell 21, wherein the contact mechanism is arranged in the shell 21, and each wiring assembly 24 is correspondingly arranged outside one end of the shell 21, and the moving contact assembly 220 of the contact mechanism and the static contact adopt a bridge structure, and the contact mechanism and the wiring assembly 24 are respectively arranged in the shell 21 and outside the shell 21, thereby ensuring that the contact mechanism forms a modular structure, which is convenient for assembly and avoids opening an operating hole for operating the wiring assembly 24 in the shell 21, which is beneficial to ensure that the contact mechanism is in a relatively closed environment and reduce the interference of the external environment on the contact mechanism.

[0055] Specifically, the two static contacts are arranged side by side in the middle of the shell 21. When the switch is opened, the connection line between each moving contact part and a static contact part is parallel to the first direction, that is, the connection line between each moving contact part and each static contact part is perpendicular to the connection line between a pair of wiring components 24. This is beneficial to reducing the space occupied by the contact mechanism and helps to reduce the volume of the entire contact unit 2. Furthermore, an isolation groove is also provided in the shell 21 between the two static contacts, and an isolation plate is provided on the contact support. When the switch is closed, the isolation plate can be correspondingly plugged into the isolation groove to block the two static contacts, thereby ensuring the safe use of the product.

[0056] Each contact unit 2 also includes two arc extinguishing systems, which are respectively arranged on both sides of the contact mechanism. In the third direction, each arc extinguishing system is located between the contact mechanism and a wiring assembly 24. Each arc extinguishing system includes an arc extinguishing chamber. The arc entry end of the arc extinguishing chamber is opposite to the contact mechanism, and the exhaust end of the arc extinguishing chamber faces the wiring assembly 24. An exhaust port is provided in the shell 21 area near the exhaust end of the arc extinguishing chamber. The arc extinguishing chamber includes a plurality of arc extinguishing grids arranged at intervals, and an arc extinguishing gap is formed between two adjacent arc extinguishing grids. The plurality of arc extinguishing gaps are arranged at intervals in the first direction, and the two ends of the arc extinguishing gap are respectively connected to the arc entry end and the exhaust end of the arc extinguishing chamber, and the exhaust end of the arc extinguishing chamber is connected to the exhaust port. The end of the moving contact bridge is connected to a moving arc-striking plate, and each static contact is connected to a static arc-striking plate. The moving arc-striking plate and the static arc-striking plate are respectively connected to the arc entry end of the arc extinguishing chamber, which is beneficial for the arc to be introduced into the arc extinguishing chamber when the contact mechanism is opened.

[0057] In addition, each arc extinguishing system further includes a magnetizing component, each magnetizing component includes two magnetic conductive plates 232, and the two magnetic conductive plates 232 are arranged at intervals to form an arc striking space. In this embodiment, the magnetic conductive plates 232 are spaced and opposite to each other in the second direction, and each arc extinguishing chamber and the moving contact part and the static contact part adjacent to the arc extinguishing chamber are located in the arc striking space. A permanent magnet 233 is arranged at one end of the arc striking space, and the permanent magnet 233 forms an arc striking magnetic field in the arc striking space, which is conducive to introducing the arc into the arc extinguishing chamber. The contact mechanism and arc extinguishing system of this embodiment can adopt existing technologies.

[0058] like Figure 4-6As shown, the current detection device, the connecting circuit board 63 and the control circuit board 6 of each contact unit 2 are all located outside the housing 21, so that each contact unit 2 forms a modular structure, and the connecting circuit board 63 is prevented from interfering with the interior of the contact unit 2 by being set through (set along the second direction); the current detection device can be a manganese copper shunt 52, preferably, the manganese copper shunt 52 is connected to the conductive plate 2231 of one of the static contacts, and the signal end of the manganese copper shunt 52 is connected to the connecting circuit board 63, or the current detection device is a Hall element, the collection end of the Hall element is connected to a static contact, and the Hall element is connected to a transmission circuit board 511, and the transmission circuit board 511 is connected to the connecting circuit board 63 for signal transmission. Of course, the manganese copper shunt 52 and the collection end of the Hall element can be connected to the moving contact assembly 220 located in the closing position, that is, connected to the moving contact bridge in the closing position.

[0059] A specific structure of a contact unit 2 is provided in conjunction with the figures.

[0060] As shown in the figure, the contact unit 2 includes a shell 21 and a pair of wiring assemblies 24. The shell 21 in the figure is a rectangular parallelepiped structure with one end closed and the other end provided with an opening. The shell 21 includes a pair of support walls spaced apart in the second direction, a pair of connecting walls and a pair of end walls are connected between the pair of support walls, wherein the pair of connecting walls are spaced apart and opposite in the third direction, and the pair of end walls are spaced apart and opposite in the first direction, and an opening is opened in the middle of one of the end walls. In the first direction, the electromagnetic operating system 3 is arranged outside the opening, and two strip-shaped linkage grooves 211 are respectively opened on the edges of the support walls on both sides of the opening, and the central axis of the linkage groove 211 is parallel to the first direction. A threading hole is opened on each connecting wall, and a pair of wiring assemblies 24 are spaced apart in the third direction, and each wiring assembly 24 is arranged outside the shell 21. In this embodiment, each wiring assembly 24 includes a wiring frame and a wiring screw arranged on the wiring frame, wherein the wiring frame corresponds to the threading hole, each wiring assembly 24 is arranged at the end of each assembly cavity, and each wiring assembly 24 is located in the wiring cavity in the wiring terminal of the housing 1.

[0061] The contact mechanism is correspondingly arranged in the shell 21 in the opening, and the contact mechanism includes a moving contact assembly 220 and two stationary contacts, wherein the moving contact assembly 220 includes a contact support and a moving contact bridge, wherein an assembly groove is provided in the middle of the contact support, and the assembly groove is penetrated along the third direction, the moving contact bridge is limitedly assembled in the assembly groove and the two ends of the moving contact bridge extend out of the assembly groove, and the two end portions of the moving contact bridge are bent and extended in the direction away from the stationary contacts to form a moving arc-striking plate, and the two stationary contacts are arranged side by side in the middle of the shell 21, and each stationary contact is connected to a stationary arc-striking plate, and each stationary arc-striking plate extends in the direction away from the moving contact assembly 220, and the contact mechanism forms a symmetrical structure about the central axis of the opening; at least one linkage shaft 2211 is provided on the side of the contact support away from the stationary contact, and the linkage shaft 2211 extends in the second direction, Figure 2 There are two linkage shafts 2211, each linkage shaft 2211 corresponds to a linkage groove 211, and two adjacent contact supports are linked and connected through the linkage shaft 2211. In addition, an axial hole can be opened on the contact support, and the linkage shaft 2211 is inserted in the axial hole. Multiple contact supports can share one linkage shaft 2211, thereby realizing the linkage connection of multiple contact supports.

[0062] In this embodiment, the static contact includes a conductive plate 2231, which is arranged along the side of the shell 21. The first end of the conductive plate 2231 is folded back and provided with a static contact portion spaced opposite to the moving contact portion. The static contact portion and the moving contact portion are spaced opposite to each other in a first direction. The first end of the conductive plate 2231 is bent and extended to form a connecting portion for connecting to the static arc-starting plate. The second end of the conductive plate 2231 extends along a third direction and extends from a threading hole provided in the shell 21 to be connected to a wiring assembly 24. The conductive plate 2231 of the static contact directly extends to the outside of the shell 21 and is connected to the wiring assembly 24, which simplifies the wiring between the wiring assembly 24 and the contact mechanism and has the advantage of convenient operation.

[0063] The two arc extinguishing systems are respectively arranged on opposite sides of the contact mechanism, each arc extinguishing system includes an arc extinguishing chamber, the arc entry end of the arc extinguishing chamber faces the contact mechanism, the moving arc striking plate extends to one side of the arc entry end of the arc extinguishing chamber, one end of the static arc striking plate is spaced opposite to the moving arc striking plate in a first direction and extends into the arc extinguishing chamber, the exhaust end of the arc extinguishing chamber faces the wiring assembly 24, that is, the exhaust end of the arc extinguishing chamber is located on the side away from the contact mechanism, and a plurality of arc extinguishing grids arranged at intervals are arranged between the arc entry end and the exhaust end of the arc extinguishing chamber. In this embodiment, an exhaust port is provided on the side wall of the shell 21 near the exhaust end of each arc extinguishing chamber, and the exhaust port is correspondingly connected to the exhaust end of the arc extinguishing chamber. The plurality of arc extinguishing grids in the same arc extinguishing chamber are spaced apart along the first direction, and an arc extinguishing gap for cutting the arc is formed between two adjacent arc extinguishing grids. The conductive plate 2231 of the static contact is arranged along the gap between the arc extinguishing chamber and the shell 21, which can make full use of the space in the shell 21 and improve space utilization.

[0064] In addition, if Figure 1 As shown, the housing 21 is also provided with a baffle 216, which shields the area of ​​the exhaust port close to the arc extinguishing chamber. If other components are provided outside the housing 21, the exhaust gas can be prevented from interfering with it. At the same time, the plate surface of the baffle 216 facing the exhaust channel can further rebound the gas, so that the gas is redirected again, which is conducive to further buffering and cooling of the gas. Of course, the baffle 21 can also be formed by the housing 1 or the partition.

[0065] Each arc extinguishing system further includes a magnetizing component, wherein the magnetizing component includes a permanent magnet 233 and two magnetic conductive plates 232, the two magnetic conductive plates 232 are arranged at intervals to form an arc striking space, that is, the two magnetic conductive plates 232 are spaced and opposite to each other in the second direction. In this embodiment, each arc extinguishing chamber, the moving contact portion and the static contact portion are all located in the arc striking space, and a permanent magnet 233 is arranged at one end of the arc striking space. The permanent magnet 233 forms an arc striking magnetic field in the arc striking space, which is conducive to introducing the arc into the arc extinguishing chamber. In this embodiment, the magnetic poles of the two permanent magnets 233 are in opposite directions, such as Figure 8 As shown, the N pole of the permanent magnet 233 located in the left arc extinguishing system and the N pole of the permanent magnet 233 located in the right arc extinguishing system are opposite in direction.

[0066] In addition, the magnetic conductive plate 232 can be disposed inside the housing 21 or outside the housing 21. Figure 2 In the embodiment, a magnetic plate mounting groove 218 for assembling a magnetic plate 232 is provided in the shell 21, that is, a magnetic plate mounting groove 218 is opened on the outer surface of each supporting wall, and the area of ​​the magnetic plate mounting groove 218 corresponds to the area covering the arc extinguishing chamber, the dynamic contact part and the static contact part. Each magnetic plate 232 is fitted on the outer wall of the shell 21, and a permanent magnet 233 is provided at one end of each magnetic plate mounting groove 218. The permanent magnet 233 extends through the shell 21 to the top of the arc extinguishing chamber and is connected to the magnetic plate 232.

[0067] like Figure 2 , 4-8, each contact unit 2 also includes a current detection device. In the third direction, the current detection device is correspondingly arranged between a static contact and an adjacent wiring assembly 24. The current detection device is connected to the adjacent static contact or the moving contact assembly 220 in the closed position. A connecting circuit board 63 is connected between the control circuit board 6 and the current detection device, and the connecting circuit board 63 performs signal transmission, wherein the plane where the connecting circuit board 63 is located is parallel to the first direction and the third direction at the same time. The current detection device is directly connected to the adjacent static contact or the moving contact assembly 220 in the closed position. The connecting circuit board 63 does not need to penetrate the contact unit 2 and connect with the control circuit board 6, which simplifies the wiring method of the current detection device, the control circuit board 6 and each contact unit 2, has less interference with the internal structure of the contact unit 2, is easy to form a modular structure, and is conducive to reducing the difficulty of assembly.

[0068] The current detection device may be a manganese copper shunt 52. Preferably, the manganese copper shunt 52 is connected to the conductive plate 2231 of one of the stationary contacts, and the signal end of the manganese copper shunt 52 is connected to the connection circuit board 63. Alternatively, the current detection device is a Hall element, and the collection end of the Hall element is connected to a stationary contact. The Hall element is connected to a transmission circuit board 511, and the transmission circuit board 511 is connected to the connection circuit board 63 for signal transmission. Of course, the manganese copper shunt 52 and the collection end of the Hall element can be connected to the moving contact assembly 220 in the closed position, that is, connected to the moving contact bridge in the closed position.

[0069] like Figure 4 As shown, the current detection device is a manganese copper shunt 52, which is connected to a conductive plate 2231 located between the shell 21 and the arc extinguishing chamber. The signal end of the manganese copper shunt 52 passes through the side wall of the shell 21 and is connected to the connecting circuit board 63. In the figure, the signal end of the manganese copper shunt 52 passes through a connecting wall of the shell 21, thereby facilitating connection with the connecting circuit board 63.

[0070] like Figure 2 , 5 -8, the current detection device is a Hall element. In the third direction, the Hall element is located between a wiring assembly 24 and the contact mechanism, and the conductive plate 2231 of the static contact and the Hall element are arranged along the first direction. The collection end of the Hall element is connected to a static contact. The Hall element is connected to a transmission circuit board 511, and the transmission circuit board 511 is connected to the connecting circuit board 63 for signal transmission. In the figure, the transmission circuit board 511 is fixedly connected to an end wall of the shell 21, and a first positioning hole 2191 and a second positioning hole 2192 are opened on the end wall of the shell 21. The transmission circuit board 511 is connected to the shell 21 through the first positioning hole 2191, and the collection end of the Hall element is connected to the conductive plate 2231 of the static contact through the second positioning hole 2192.

[0071] In this embodiment, the connecting circuit board 63 connected between the control circuit board 6 and the current sensor is arranged along the outside of the shell 21, and the plane where the connecting circuit board 63 is located is parallel to the first direction and the third direction at the same time. It can also be understood that, in the second direction, the connecting circuit board 63 is stacked on the outside of a supporting wall of the shell 21, and in the third direction, the connecting circuit board 63 is located between the contact mechanism and a wiring assembly 24. In this way, the connecting circuit board 63 is prevented from passing through the contact unit 2 along the second direction, thereby ensuring the independence of the wiring unit, facilitating the formation of a modular structure, and facilitating assembly.

[0072] Specific as Figure 2 , 7 As shown, the connecting circuit board 63 is an overall strip-shaped plate structure, and the connecting circuit board 63 is located between the magnetic conductive plate mounting groove 218 and a wiring assembly 24, and the connecting circuit board 63 partially overlaps with the exhaust port opened in the shell 21, and the shell 21 is provided with a baffle 216 for blocking part of the exhaust port. In the second direction, the baffle 216 is stacked between the connecting circuit board 63 and the exhaust port, so as to prevent the exhaust gas discharged by the arc extinguishing system from interfering with the connecting circuit board 63. In the figure, in the first direction, the length of the connecting circuit board 63 is slightly greater than the length of the supporting wall, so that one end of the connecting circuit board 63 is connected to the control circuit board 6, and the other end of the connecting circuit board 63 can be connected to the transmission circuit board 511 connected to the Hall element. A signal port 60 can be set on the control circuit board 6, and a socket is opened in the area of ​​the shell 1 corresponding to the signal port 60.

[0073] Of course, if Figure 3 As shown, in the third direction, the connecting circuit board 63 can also be correspondingly located between a pair of wiring components 24, that is, in the second direction, the connecting circuit board 63 and the contact mechanism are stacked, and the connecting circuit board 63 is located outside the shell 21 and between the two magnetic conductive plate mounting grooves 218, one end of the connecting circuit board 63 extends along the first direction to be connected to the control circuit board 6, and the edges on both sides of the other end of the connecting circuit board 63 extend along the third direction toward the direction close to the wiring component 24 to form an extension plate, one of the extension plates can exceed a connecting wall of the shell 21, and a signal port 60 can be arranged at the extension plate, and a socket is opened in the area of ​​the shell 1 opposite to the signal port 60, at this time, the signal port 60 and the socket are correspondingly located at the wiring terminal of the shell 1, and the other extension plate can be connected to the current detection device in the conductive plate 2231 area corresponding to the static contact.

[0074] Of course, the connecting circuit board 63 can also be set at other positions outside the shell 21. The assembly position of the connecting circuit board 63 is more flexible, which is convenient for connecting the control circuit board 6 and fully utilizes the space inside the shell 1. In particular, the connecting circuit board 63 is arranged along the outer side of the shell 21 of the contact unit 2, avoiding interference of the contact unit 2 with the connecting circuit board 63.

[0075] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the accompanying drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0076] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A switch device, comprising a housing (1), a control circuit board (6) and at least one contact unit (2) being arranged in the housing (1), the contact unit (2) comprising a pair of wiring assemblies (24), a contact mechanism being arranged between the pair of wiring assemblies (24), the contact mechanism comprising a moving contact assembly (220) and two stationary contacts, each stationary contact being electrically connected to an adjacent wiring assembly (24), characterized in that: The control circuit board (6) and the contact unit (2) are arranged along a first direction, and each contact unit (2) further comprises a current detection device. In a third direction, the current detection device is arranged between a static contact and an adjacent wiring assembly (24), and the current detection device is connected to an adjacent static contact or a moving contact assembly (220) in a closed position. A connecting circuit board (63) connected between the control circuit board (6) and the current detection device is used to transmit signals, and a plane where the connecting circuit board (63) is located is parallel to both the first direction and the third direction, and the first direction, the second direction and the third direction are parallel to each other.

2. The switch device according to claim 1, characterized in that: Each contact unit (2) comprises a housing (21), the contact mechanism is arranged inside the housing (1), and the current detection device, the connecting circuit board (63) and the control circuit board (6) are arranged outside the housing (21).

3. The switch device according to claim 2, characterized in that: It comprises at least two contact units (2), two adjacent contact units (2) are arranged side by side in a second direction, and the control circuit board (6) spans one or two contact units (2) along the second direction.

4. The switch device according to claim 3, characterized in that: A pair of wiring components (24) of each contact unit (2) are arranged in the housing (1) at intervals along a third direction, and the housing (21) is located between the pair of wiring components (24).

5. The switch device according to claim 3, characterized in that: At least one partition is arranged in the housing (1), and the partition divides the space in the housing (1) into at least two assembly cavities, each of which is provided with a contact unit (2), and the control circuit board (6) spans one or two assembly cavities along the second direction.

6. The switch device according to claim 2, characterized in that: It comprises a control circuit board (6) and a contact unit (2), wherein the control circuit board (6) and the contact unit (2) are stacked in a second direction within a housing (1).

7. The switch device according to claim 2, characterized in that: The current detection device is a Hall element, the collection end of the Hall element passes through the side wall of the shell (21) and is connected to a static contact, a transmission circuit board (511) is connected between the Hall element and the connecting circuit board (63), and the transmission circuit board (511) is located outside the shell (21); or, the current detection device is a manganese copper shunt (52), the manganese copper shunt (52) is connected to one of the static contacts, and the signal end of the manganese copper shunt (52) passes through the side wall of the shell (21) and is connected to the connecting circuit board (63).

8. The switch device according to claim 7, characterized in that: The connecting circuit board (63) is stacked with the contact mechanism in the second direction, and the plane where the connecting circuit board (63) is located is parallel to the first direction and the third direction.

9. The switch device according to claim 8, characterized in that: The connecting circuit board (63) and / or the control circuit board (6) is provided with a signal port (60), and a socket is provided on the side wall of the housing (1) corresponding to the signal port (60).

10. The switch device according to any one of claims 1 to 9, characterized in that: Each contact system also includes two arc extinguishing systems, and each arc extinguishing system is correspondingly arranged between the contact mechanism and a wiring assembly (24).

11. The switch device according to claim 10, characterized in that: The static contact comprises a conductive plate (2231), one end of the conductive plate (2231) is provided with a static contact portion, and the other end of the conductive plate (2231) extends along a third direction and is correspondingly connected to a wiring assembly (24).

12. The switch device according to claim 11, characterized in that: The control circuit board (6) is also connected to an electromagnetic operating system (3), the electromagnetic operating system (3) and the control circuit board (6) are arranged side by side in a second direction or a third direction, the electromagnetic operating system (3) comprises a coil assembly and a moving assembly, the moving assembly is connected to a moving contact assembly (220) of at least one contact unit (2), and the coil assembly drives the moving assembly to move between a first position and a second position, so as to drive the moving contact assembly (220) to move along the first direction.

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