Change-over switch

Abstract

The change-over switch comprises a shell and a switch pole, the switch pole comprises two groups of contact mechanisms, each group of contact mechanism comprises a moving contact assembly and a static contact group which are opposite to each other at intervals in a first direction, the moving contact assembly comprises a contact support, the contact support is provided with a moving contact, two ends of the moving contact are respectively matched with the two static contacts, and the self-locking piece is arranged on the contact support. The self-locking piece is matched with the contact supports of the two sets of contact mechanisms respectively, the contact support moving in the closing process drives the self-locking piece to move in the shell in the first direction, and when one set of contact mechanism cannot be opened, the self-locking piece is driven by the contact support of the other set of contact mechanism to move, so that the contact mechanism which cannot be opened is opened, or the self-locking piece is driven by the contact support of the other set of contact mechanism to move in the second direction. And the self-locking piece is limited by the contact mechanism which cannot be switched off, so that the other group of contact mechanism cannot be switched on. According to the utility model, when one group of contact mechanisms cannot be switched off, the self-locking piece realizes forced switching off or the other group of contact mechanisms cannot be switched on, so that the two groups of contact mechanisms cannot be switched on at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of low-voltage apparatus, concretely relates to a change-over switch. BACKGROUND

[0002] The change-over switch realizes the conversion of load line between two power sources, is widely applied in various uninterrupted power supply places to ensure power supply reliability, and generally realizes the conversion of normal and standby power sources by switching the opening and closing of two sets of contact mechanisms, and in the existing product, the interlocking structure is usually configured to ensure that the two sets of contact mechanisms cannot be closed at the same time, and the interlocking structure can normally operate to ensure that only one set of contact mechanism is closed when normally opening and closing, and the interlocking structure has the following defects: first, when one of the contact mechanisms cannot be opened due to welding, the interlocking structure cannot forcibly open, which is easy to cause safety hazards; second, the interlocking structure needs to cooperate with the rotating shafts in the two sets of contact mechanisms, so that the two sets of contact mechanisms cannot share the same rotating shaft, the structure is complex, and a large space is occupied. SUMMARY

[0003] The utility model aims at overcoming at least one defect of the prior art, and provides a change-over switch.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] The utility model provides a change-over switch, including shell and switch pole setting in the shell, the switch pole includes two sets of contact mechanisms, and each set of contact mechanism includes dynamic contact assembly and static contact group that are opposite and are spaced in the first direction, the dynamic contact assembly includes contact support, the contact support is equipped with dynamic contact, both ends of the dynamic contact are matched with two static contacts respectively, and the contact support is driven along the first direction to move linearly by the rotating shaft that is rotatably assembled in the shell,

[0006] Also include self locking piece, the self locking piece is matched with the contact support of two sets of contact mechanisms respectively, is driven along the first direction in the shell by the contact support that closes the movement, when one set of contact mechanism cannot be opened, the self locking piece is driven to move under the contact support of the other set of contact mechanism, so that the contact mechanism that cannot be opened is opened, or the self locking piece is limited by the contact mechanism that cannot be opened, so that the other set of contact mechanism cannot be closed.

[0007] Preferably, the self locking piece is arranged on the same side of the two sets of contact mechanisms and the rotating shaft, the contact support is provided with a matching part, the matching part is opposite and spaced from the dynamic contact in the first direction, and the self locking piece is provided with a locking part corresponding to the matching part, and in the first direction, the locking part is located between the dynamic contact of the same dynamic contact assembly and the matching part.

[0008] Preferably, the maximum distance between the engaging portions of the two sets of contact mechanisms in the first direction is smaller than the distance between the interlocking portions of the two sets of contact mechanisms.

[0009] Preferably, the self-locking member comprises a rod-shaped body, and the rod-shaped body is provided with interlocking portions at two ends thereof, each of the interlocking portions extending between a contact support and a movable contact of an adjacent movable contact assembly, and the contact support pushes the interlocking portion during a closing movement to move the self-locking member in the first direction.

[0010] Preferably, a contact spring is arranged between the movable contact and the contact support.

[0011] Preferably, the movable contact comprises at least two movable contact bridges arranged side by side in a third direction, and each movable contact bridge is connected with a contact spring at a side opposite to the stationary contact, and the third direction is perpendicular to the first direction.

[0012] Preferably, the contact support is provided with a partition plate for separating two adjacent movable contact bridges.

[0013] Preferably, the switch pole further comprises a rotating shaft rotatably arranged between the two sets of contact mechanisms, each contact support is connected with the rotating shaft through a linkage, and the hinge points of the two linkages and the rotating shaft and the axis of the rotating shaft are not collinear.

[0014] Preferably, the rotating shaft comprises a driving shaft, and the driving shaft is provided with two coaxial rotating discs rotatably arranged thereon and driven by the driving shaft, and each rotating disc is connected with the contact support through a linkage.

[0015] Preferably, the driving shaft is provided with a driving portion, each rotating disc is provided with a driving groove, and the driving portion is matched with the driving grooves of the two rotating discs.

[0016] The switch of the utility model, the self-locking member is cooperatively driven by the contact support, does not interfere with the action of the two sets of contact mechanisms during normal opening and closing, when one set of contact mechanisms cannot be opened, the other set of contact mechanisms realizes forced opening through the self-locking member, or the self-locking member is limited by the contact mechanism that cannot be opened, so that the other set of contact mechanisms cannot be closed, thereby ensuring that the two sets of contact mechanisms cannot be closed at the same time, and the use safety is improved.

[0017] In addition, the self-locking member is provided with the interlocking portion, and the contact support is provided with the engaging portion, so that the structure is simple, and in particular, the self-locking member is rod-shaped as a whole, so that the volume is further reduced, and the occupation of the internal space is avoided.

[0018] In addition, the two sets of movable contact assemblies can be connected on the same rotating shaft, so that the volume is further reduced, and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1Is the structure schematic view of switch pole in the utility model;

[0020] Figure 2 Is the structure schematic view of contact mechanism, pivot and self locking piece in the utility model;

[0021] Figure 3 Is the structure schematic view of self locking piece in the utility model;

[0022] Figure 4 Is the structure schematic view of movable contact assembly in the utility model;

[0023] Figure 5 Is the structure schematic view of contact support in the utility model;

[0024] Figure 6 Is the structure schematic view of pivot in the utility model;

[0025] Figure 7 Is the structure schematic view of driving shaft in the utility model;

[0026] Figure 8 Is the structure schematic view of rotating disc in the utility model;

[0027] Reference signs:

[0028] 1-outer shell, 11-limiting part, 2-switch pole, 20-wiring terminal, 21-pivot, 211-driving shaft, 2111-driving part, 212-rotating disc, 2120-central hole, 2121-driving groove, 2122-closing part, 2123-connecting part, 2124-connecting hole, 2125-stop part, 22-movable contact assembly, 221-contact support, 2210-mounting cavity, 2211-hinge part, 2212-matching part, 2213-baffle, 2214-plug-in part, 222-movable contact, 2220-movable contact bridge, 2221-movable contact point, 223-contact spring, 231-static contact plate, 232-static contact point, 24-linkage, 25-reset elastic part, 27-self locking piece, 271-interlocking part. DETAILED DESCRIPTION

[0029] The following embodiments are further illustrated by the embodiments given in the accompanying drawings, which further illustrate the specific implementation of the change-over switch of the utility model. The change-over switch of the utility model is not limited to the description of the following embodiments.

[0030] As Figure 1As shown, the switch includes a housing 1, at least one switch pole 2 is arranged in the housing 1, when two or more switch poles 2 are arranged in the housing 1, the adjacent two switch poles 2 are arranged in layers, each switch pole 2 includes at least three terminals 20, two sets of contact mechanisms and a rotating shaft 21, the three terminals 20 are divided into at least two incoming terminals and at least one outgoing terminal, the incoming terminals and the outgoing terminals are arranged at opposite ends of the housing 1, each terminal 20 is connected with a terminal port arranged on the housing 1 and used for connecting with an external power supply, each set of contact mechanisms is connected between an incoming terminal and an outgoing terminal, that is, one set of contact mechanisms in the switch pole 2 is connected with the commonly used power supply through the terminal 20 connected therewith, and the other set of contact mechanisms is connected with the standby power supply through the terminal 20 connected therewith.

[0031] Specifically, the two sets of contact mechanisms in each switch pole 2 are arranged in layers in the housing 1, each set of contact mechanisms is connected between an incoming terminal and an outgoing terminal, the rotating shaft 21 is arranged between the two sets of contact mechanisms, and the rotating shaft 21 is driven to rotate, so that the two sets of contact mechanisms in the same switch pole 2 are driven to open and close, one pair of contact mechanisms is used to control the disconnection and connection of the commonly used power supply, and the other pair of contact mechanisms is used to control the disconnection and connection of the standby power supply, and the commonly used power supply and the standby power supply are not connected at the same time, that is, the two sets of contact mechanisms cannot be closed at the same time, and when the rotating shaft 21 drives one set of contact mechanisms to close, the other set of contact mechanisms is driven to open.

[0032] Each set of contact mechanisms includes a movable contact assembly 22 and a static contact group arranged in layers, the movable contact assembly 22 includes a contact support 221 and a movable contact 222 arranged on the contact support 221, the movable contact 222 is provided with a movable contact point 2221 at both ends, the static contact group includes two static contacts arranged in layers, each static contact is provided with a static contact point 232, the contact support 221 is driven by the rotating shaft 21 to drive the movable contact assembly 22 to move in a straight line, so that the movable contact point 2221 and the static contact point 232 in the same set of contact mechanisms are in contact or separated, thereby connecting or disconnecting one set of contact mechanisms.

[0033] For convenience of description, the moving direction of the movable contact assembly 22 is the first direction, that is Figure 1 the up-down direction in the drawing is the first direction, the two sets of contact mechanisms are arranged in layers in the first direction, the two directions perpendicular to the first direction are the second direction and the third direction, the incoming terminals and the outgoing terminals are arranged in layers in the second direction, that is Figure 1 the left-right direction in the drawing is the second direction, the third direction is perpendicular to the first direction and the second direction, Figure 1

[0034] ​The improvement of the present application is that each switch pole 2 further comprises a self-locking member 27, which is matched with the contact support 221 of the two sets of contact mechanisms respectively, and is driven by the contact support 221 to move in the first direction within the housing 1, when one of the two sets of contact mechanisms fails to open, the self-locking member 27 is driven by the contact support 221 of the other set of contact mechanisms to open the contact mechanism that fails to open, or the self-locking member 27 is limited by the contact mechanism that fails to open, so that the other set of contact mechanisms fails to close.

[0035] In this way, the self-locking member 27 is driven by the contact support 221, and does not interfere with the operation of the two sets of contact mechanisms during normal opening and closing, when one set of contact mechanisms fails to open, the other set of contact mechanisms forcibly opens through the self-locking member 27, or the self-locking member is limited by the contact mechanism that fails to open, so that the other set of contact mechanisms fails to close, thereby ensuring that the two sets of contact mechanisms cannot close at the same time, and improving the safety in use.

[0036] Specifically, in the second direction, the self-locking member 27 is arranged on the same side of the two sets of contact mechanisms and the rotating shaft 21, the contact support 221 is provided with a matching part 2212, and the self-locking member 27 is provided with a locking part 271 corresponding to the matching part 2212, preferably, in number, the matching part 2212 on the contact support 221 corresponds to the locking part 271 one by one, in the first direction, the matching part 2212 is spaced from the moving contact 222, and the locking part 271 is located between the moving contact 222 and the matching part 2212, preferably, the self-locking member 27 is provided with one locking part 271 at each end, and each contact support 221 is provided with at least one matching part 2212.

[0037] In the first direction, when the distance from the static contact group to the rotating shaft 21 is greater than the distance from the moving contact assembly 22 to the rotating shaft 21, that is, each moving contact assembly 22 moves linearly between the rotating shaft 21 and the static contact group, the distance between the locking parts 271 of the self-locking member 27 corresponding to the two sets of contact mechanisms is greater than the maximum distance between the matching parts 2212 of the two sets of contact mechanisms (the distance between the two matching parts 2212 when the two sets of contact mechanisms close at the same time is the maximum distance), that is, the maximum distance between the matching parts 2212 of the two contact supports 221 is less than the distance between the two locking parts 271 of the self-locking member 27; when the distance from the static contact group to the rotating shaft 21 is less than the distance from the moving contact assembly 22 to the rotating shaft 21, that is, each moving contact assembly 22 moves linearly on the side away from the rotating shaft 21 of the static contact group, the distance between the two locking parts 271 of the self-locking member 27 is greater than the minimum distance between the matching parts 2212 of the two contact supports 221 (the distance between the two matching parts 2212 when the two sets of contact mechanisms close at the same time is the minimum distance).

[0038] In combination Figures 1-8 A specific embodiment of a change-over switch is provided.

[0039] As Figure 1 shown, the switch includes a housing 1, at least one switch pole 2 is arranged in the housing 1, a terminal 20 is arranged in each switch pole 2, the terminal 20 is divided into an incoming terminal and an outgoing terminal, the incoming terminal and the outgoing terminal are spaced apart in a second direction, usually, the incoming terminal and the outgoing terminal are arranged in pairs; each switch pole 2 includes two groups of contact mechanisms arranged in a first direction, a rotating shaft 21 is arranged between the two groups of contact mechanisms, each group of contact mechanisms includes a moving contact assembly 22 and a static contact group spaced apart in the first direction, the moving contact assembly 22 is connected with the rotating shaft 21 through a linkage 24, the moving contact assembly 22 is driven by the rotating shaft 21 to move in the first direction for cooperation with the static contact group, the static contact group includes two static contacts arranged in the second direction, in the same contact mechanism, the distance between each static contact and the rotating shaft 21 is greater than the distance between the moving contact assembly 22 and the rotating shaft 21, the moving contact assembly 22 moves linearly between the rotating shaft 21 and the static contact group, in this embodiment, the two groups of moving contact assemblies 22 are simultaneously driven by the rotating shaft 21 to move in the first direction, but the two groups of contact mechanisms cannot be simultaneously connected, that is, one group of moving contact assemblies 22 is in contact with one group of static contacts, and the other group of moving contact assemblies 22 is separated from the other group of static contacts.

[0040] As Figure 1 , 2 , 4 and 5, the moving contact assembly 22 includes a contact support 221, a mounting cavity 2210 is arranged in the middle of the contact support 221, a moving contact 222 is arranged in the mounting cavity 2210 in the second direction, two ends of the moving contact 222 are respectively provided with a moving contact portion extending out of the mounting cavity 2210, each moving contact portion is matched with a static contact, a contact spring 223 is arranged between the middle of the moving contact 222 and the contact support 221, when the moving contact 222 moves relative to the contact support 221, the contact spring 223 elastically deforms to provide a contact pressure for the moving contact 222.

[0041] Specifically, the contact support 221 comprises a block-shaped support body, a through groove serving as a mounting cavity 2210 is formed in the middle of the support body, the two side edges of the mounting cavity 2210 respectively extend outward along the second direction to form a matching portion 2212 and a pushing portion, the matching portions 2212 of the two contact supports 221 correspond to the same side in the shell 1, the pushing portions of the two contact supports 221 also correspond to the same side in the shell 1, a partition plate 2213 is arranged in the mounting cavity 2210, the mounting cavity 2210 is divided into two relatively independent contact cavities by the partition plate 2213; one end of the support body is provided with a hinged portion 2211, a driving hole for hinging with the linkage 24 is arranged in the middle of the hinged portion 2211, the other end of the support body is provided with a pair of spaced apart baffle plates, the support body between the two baffle plates is provided with a protruding plug-in portion 2214, the plug-in portion 2214 can be used to connect the reset elastic member 25, so that the reset elastic member 25 and the linkage 24 together form a driving assembly connected to the moving contact assembly 22.

[0042] Further, the moving contact 222 comprises at least one moving contact bridge 2220, each moving contact bridge 2220 is connected with a contact spring 223 on the side opposite to the stationary contact, both ends of each moving contact bridge 2220 serve as two moving contact portions, each moving contact portion is provided with a moving contact point 2221, when the moving contact 222 comprises more than two moving contact bridges 2220, the two adjacent moving contact bridges 2220 are arranged side by side in the third direction, preferably, the partition plate 2213 is arranged in the mounting cavity 2210 to separate the two adjacent moving contact bridges 2220, each moving contact bridge 2220 is provided with one contact spring 223, that is, one contact spring 223 is connected between the middle of the side of each moving contact bridge 2220 opposite to the stationary contact and the contact support 221; the stationary contact comprises a stationary contact plate 231, one end of the stationary contact plate 231 is arranged along the second direction, so that the one end of the stationary contact plate 231 is spaced apart from the moving contact bridge 2220 in the first direction and is provided with a stationary contact point 232 matched with the moving contact point 2221, the other end of the stationary contact plate 231 extends along the side position in the shell 1 and is connected with an adjacent terminal 20.

[0043] As Figure 1 , 3As shown in the figure, each switch pole 2 is also configured with a self-locking piece 27, in the second direction, the self-locking piece 27 is arranged at the same side of the rotating shaft 21 and the two sets of contact mechanisms, the self-locking piece 27 is matched with the contact support 221 of the two sets of contact mechanisms respectively, the self-locking piece 27 is driven by the contact support 221 moving by closing to move in the first direction in the shell (the shell 1), when one of the contact mechanisms cannot be opened due to welding, the self-locking piece 27 is driven by the contact support 221 of the other contact mechanism to move, so that the contact mechanism that cannot be opened is opened, and through forced opening, it can be ensured that the two sets of contact mechanisms cannot be closed at the same time, and the safety is improved. Of course, when one set of contact mechanisms cannot be opened, the driving force of the rotating shaft 21 is not enough to open the contact mechanism that has welded, the contact mechanism that cannot be opened limits the movement of the self-locking piece 27, so that the other set of contact mechanisms cannot be closed, and the two sets of contact mechanisms cannot be closed at the same time.

[0044] As shown in the figure, Figure 1 , 3 The self-locking piece 27 is provided with two interlocking parts 271 spaced apart in the first direction, each interlocking part 271 is matched with the contact support 221 in one set of moving contact assembly 22, preferably, each contact support 221 is provided with a matching part 2212 matched with the interlocking part 271, in the first direction, each matching part 2212 is spaced apart from the moving contact bridge 2220, each interlocking part 271 is located between the matching part 2212 and the moving contact bridge 2220, in this embodiment, when the two sets of contact mechanisms are closed at the same time, the distance between the matching parts 2212 of the two sets of contact mechanisms in the first direction is maximum, when the two sets of contact mechanisms are opened at the same time, the distance between the matching parts 2212 of the two sets of contact mechanisms in the first direction is minimum, the distance between the two interlocking parts 271 of the self-locking piece 27 is less than the maximum distance between the two matching parts 2212 of the two sets of contact mechanisms.

[0045] As shown in the figure, Figure 3 The self-locking piece 27 includes a rod-shaped body, the two ends of the rod-shaped body are respectively provided with interlocking parts 271, Figure 3 Each interlocking part 271 can be considered as a rectangular boss structure protruding from one end of the rod-shaped body, so that the self-locking piece 27 as a whole presents a U-shaped body structure, each interlocking part 271 extends to between the contact support 221 and the moving contact 222 of the adjacent moving contact assembly 22, the self-locking piece 27 has simple structure and straight movement track, which can reduce the space occupied in the shell 1.

[0046] When the rotating shaft 21 is rotated to switch the opening and closing states of the two sets of contact mechanisms, one set of contact mechanisms switches from opening to closing, that is, the contact support 221 in this contact mechanism moves in the closing direction, and the other set of contact mechanisms switches from closing to opening, that is, the contact support 221 in this contact mechanism moves in the opening direction. One interlocking part 271 of the self-locking member 27 is pushed by the cooperating part 2212 of the closing movement. The self-locking member 27 moves together with the contact support 221 of the closing movement in the first direction, so that the other interlocking part 271 of the self-locking member 27 and the cooperating part 2212 of the opening movement always remain at a distance from each other. Thus, when the two sets of contact mechanisms are performing normal opening and closing, the self-locking member 27 moves together with the contact support 221 of the closing movement, so it will not interfere with the normal opening and closing of the two sets of contact mechanisms.

[0047] However, during the rotation of the shaft 21, due to the welding of the contact mechanism in the closed state, the other set of contact mechanisms can still be switched from open to closed. One interlocking part 271 of the self-locking member 27 is driven to move in a straight line by the contact support 221 that moves in the closed state. Although the contact mechanism in the welded state cannot be separated, the distance between the two interlocking parts 271 of the self-locking member 27 in the first direction is less than the maximum distance between the mating parts 2212 on the two sets of contact mechanisms when they are closed at the same time. The interlocking part 271 corresponding to the welded state pushes the mating part 2212 of the contact support 221, forcing the welded contact mechanism to open, thereby avoiding the two sets of contact mechanisms from closing at the same time and ensuring the safety of product use.

[0048] like Figure 1 As shown, the rotating shaft 21 is rotatably mounted between two sets of contact mechanisms. The axis of rotation of the rotating shaft 21 is parallel to a third direction. The rotating shaft 21 is connected to the hinge portion 2211 of a contact support 221 via linkage 24. The hinge points of the two linkages 24 and the rotating shaft 21, as well as the axis of the rotating shaft 21, are not collinear. The rotating shaft 21 can be a single integral structure or a split structure. In this embodiment, a split structure is preferred for the rotating shaft 21. Figures 6-8 As shown, the rotating shaft 21 includes a drive shaft 211, on which two rotating disks 212 are coaxially mounted. Each rotating disk 212 can be driven to rotate by the drive shaft 211, and each rotating disk 212 is connected to a moving contact assembly 22 through a linkage 24.

[0049] Furthermore, each contact support 221 is also connected to a reset elastic element 25. Figure 1 , 2In section 4, the reset elastic element 25 is elastically connected between the insertion part 2214 of the contact support 221 and the outer shell 1. The reset elastic element 25 and the linkage element 24 connected on the same contact support 221 together form a set of drive components. The drive components convert the circumferential rotation of the rotating shaft 21, so that the contact mechanism performs opening and closing movements along a straight line.

[0050] Combination Figures 6-8 The structure of the rotating shaft 21 in this embodiment is described in detail.

[0051] like Figures 6-8 As shown, the rotating shaft 21 includes a drive shaft 211 and two rotating disks 212. The drive shaft 211 is cylindrical in shape. Both ends of the drive shaft 211 are provided with shaft holes for drive connection. A boss structure as a drive part 2111 is provided on the circumferential side wall of the drive shaft 211.

[0052] like Figure 6 , 8 As shown, the rotating disk 212 is generally circular. A central hole 2120, penetrating both sides, is formed in the middle of the end face of each rotating disk 212. One end of the drive shaft 211 rotates through the central hole 2120 and can rotate around its axis within the central hole 2120. An arc groove is also formed on the end face of the rotating disk 212, serving as a drive groove 2121. In this embodiment, the side of the drive groove 2121 with the smaller diameter is connected to the central hole 2120. The drive groove 2121, the central hole 2120, and the rotating disk 212 are concentric. Each drive groove 2121 has a closing part 2122 and a stop part 2126 at its two ends. When two rotating disks 212 are coaxially assembled on the drive shaft 212... At 11 o'clock, two rotating disks 212 are located on both sides of the drive unit 2111 along the axial direction of the drive shaft 211. In the circumferential direction, two closing parts 2122 are respectively located on both sides of the drive unit 2111. The drive unit 2111 can drive the rotating disks 212 to rotate in the closing direction by pushing the closing parts 2122, and the drive unit 211 can drive the rotating disks 212 to rotate in the opening direction by pushing the stop part 2126. Each rotating disk 212 has a connecting part 2123 protruding from its circumferential sidewall. The connecting part 2123 has a connecting hole 2124 for hinged linkage 24. In this embodiment, the connecting part 2123 is located adjacent to the stop part 2126. Furthermore, a limit part 11 is also provided inside the outer casing 1. Figure 1 The middle limiting part 11 is an arc-shaped boss. The limiting part 11 is arranged around the side of the rotating shaft 21 opposite to the connecting part 2123. When the rotating shaft 21 is rotated, each connecting part 2123 can cooperate with the limiting part 11 to stop, thereby limiting the rotation when the rotating disk 212 rotates to the open position.

[0053] In the embodiment, a control pole (not shown) can also be arranged in the shell 1, and the control pole is arranged in parallel with the switch pole 2 in the third direction. The control pole comprises a circuit board, a motor and a gear set. The circuit board is provided with a controller. The motor is connected to the circuit board and is started and stopped according to a control signal output by the controller. The gear set is drivingly connected between an output shaft of the motor and the rotating shaft 21, that is, the gear set is connected with the driving shaft 211, so as to realize automatic opening and closing of the switch pole 2 driven by the control pole. In addition, the control pole and the switch pole 2 can be separated by a separation plate arranged in the shell 1, or the control pole and the switch pole 2 have respective housings, and the control pole and the switch pole 2 are assembled together through the respective housings.

[0054] It should be noted that, in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings or the orientation or positional relationship in use, and are only for the convenience of description, and do not indicate that the device or element referred to must have a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating relative importance.

[0055] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, some simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be regarded as falling within the protection scope of the present application.

Claims

1. A switch, comprising a housing (1) and a switching pole (2) arranged in the housing (1), the switching pole (2) comprising two groups of contact mechanisms, each group of contact mechanisms comprising a moving contact assembly (22) and a stationary contact group spaced apart in a first direction, the moving contact assembly (22) comprising a contact support (221) provided with a moving contact (222), two ends of the moving contact (222) being respectively matched with two stationary contacts, the contact support (221) being driven by a rotating shaft (21) rotatably arranged in the housing (1) to move linearly in the first direction, further comprising a self-locking member (27) matched with the contact support (221) of each group of contact mechanisms, the self-locking member (27) being driven by the contact support (221) moving to close to move in the first direction in the housing (1), when one group of contact mechanisms fails to open, the self-locking member (27) is driven by the contact support (221) of the other group of contact mechanisms to move, so that the group of contact mechanisms failing to open is opened, or the self-locking member (27) is limited by the group of contact mechanisms failing to open, so that the other group of contact mechanisms fails to close. characterized in that The self-locking member (27) is arranged on the same side of the two groups of contact mechanisms and the rotating shaft (21), the contact support (221) is provided with a matching part (2212) spaced apart from the moving contact (222) in the first direction, the self-locking member (27) is provided with a locking part (271) corresponding to the matching part (2212), in the first direction, the locking part (271) is located between the moving contact (222) of the same moving contact assembly (22) and the matching part (2212).

2. The switch according to claim 1, characterized in that: In the first direction, the maximum distance between the matching parts (2212) of the two groups of contact mechanisms is less than the distance between the locking parts (271) of the corresponding two groups of contact mechanisms.

3. The switch according to claim 2, characterized in that: The self-locking member (27) comprises a rod-shaped body, two ends of the rod-shaped body are respectively provided with a locking part (271), each locking part (271) extends to between the contact support (221) and the moving contact (222) of the adjacent moving contact assembly (22), the contact support (221) pushes the locking part (271) when moving to close, so that the self-locking member (27) moves in the first direction.

4. The switch according to claim 1, characterized in that: The moving contact (222) and the contact support (221) are provided with a contact spring (223).

5. The switch according to claim 1, characterized in that: The moving contact (222) comprises at least two moving contact bridges (2220) arranged side by side in a third direction, each moving contact bridge (2220) is connected with a contact spring (223) on the side opposite to the stationary contact, the third direction is perpendicular to the first direction.

6. The switch according to claim 5, characterized in that: The contact support (221) is provided with a partition plate (2213) for separating the adjacent two moving contact bridges (2220).

7. The switch according to claim 6, characterized in that: The switching pole (2) further comprises a rotating shaft (21) rotatably arranged between the two groups of contact mechanisms, each contact support (221) is connected with the rotating shaft (21) through a linkage (24), and the hinge points of the two linkages (24) and the rotating shaft (21) and the axis of the rotating shaft (21) are not collinear.

8. The switch according to claim 1, characterized in that: ​ 9. The switch according to claim 8, characterized in that: The rotating shaft (21) comprises a driving shaft (211), two coaxial rotating discs (212) are assembled on the driving shaft (211), and the two rotating discs (212) are respectively driven in cooperation with the driving shaft (211); each rotating disc (212) is connected with the contact support (221) through a linkage (24).

10. The switch according to claim 9, characterized in that: The driving shaft (211) is provided with a driving portion (2111), each rotating disc (212) is provided with a driving groove (2121), and the driving portion (2111) is matched with the driving grooves (2121) of the two rotating discs (212) respectively.

Images