Fault signal contact structure and switchgear

Abstract

A fault signal contact structure comprises a shell, a blocking rod, a deflector rod, a deflector rod spring and a contact assembly, the blocking rod, the deflector rod, the deflector rod spring and the contact assembly are mounted in the shell, the blocking rod and the deflector rod are movably arranged, the blocking rod is provided with a trigger rod extending out of the shell, the blocking rod is in limiting fit with the deflector rod to enable the deflector rod spring to be in an energy storage state, and a moving contact is in linkage connection with the deflector rod. And when the trigger rod of the blocking rod is triggered to enable the blocking rod to move so as to release the limiting fit with the deflector rod, the deflector rod spring releases energy to drive the deflector rod to move, so that the deflector rod drives the moving contact to switch the opening and closing states of the contact assembly. A switchgear includes a fault signal contact structure. According to the fault signal contact structure and the switch equipment, when the switch equipment breaks down, the triggered blocking rod releases the position limitation with the deflector rod to release the deflector rod spring, so that the deflector rod drives the moving contact to switch the opening and closing states of the contact assembly so as to transmit fault signals, the structure is simple, the assembly is convenient, the action relation is simple, and the reliability is high. And the accuracy and reliability of fault alarm are improved.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a fault signal contact structure and a switch device. Background Art

[0002] In low-voltage power distribution systems, with the development of integrated and networked power systems, low-voltage components with various fault indication functions have become a trend. Both universal and miniature circuit breakers feature various internal and external accessories to enhance their performance. These accessories, which provide fault alarms and indications when a circuit breaker fails, are generally referred to as fault accessories or alarm switches. Their purpose is to monitor the circuit breaker's fault status or detect the fault type (undervoltage, overcurrent, short circuit, etc.). They are used to indicate the alarm status of load line faults, facilitating timely detection and repair and replacement. When a circuit breaker fails, the fault device provides a fault alarm signal.

[0003] The fault accessories in the prior art have the problems of complex structure, inconvenient assembly, complex action relationship, unreliable fault alarm, etc. Summary of the Invention

[0004] The purpose of the present utility model is to overcome at least one defect of the prior art and provide a fault signal contact structure and a switch device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The fault signal contact structure includes a shell, a blocking rod installed in the shell, a shift rod, a shift rod spring that provides elastic reset force for the shift rod, and a contact assembly. The contact assembly includes a matching moving contact and a static contact. The blocking rod and the shift rod are respectively movably arranged. The blocking rod has a trigger rod extending out of the shell. The blocking rod is limited by the shift rod so that the shift rod spring is in an energy storage state. The moving contact is linked to the shift rod. When the trigger rod of the blocking rod is triggered to move the blocking rod to release the limit cooperation with the shift rod, the shift rod spring releases energy to drive the shift rod to move, so that the shift rod drives the moving contact to switch the open and closed state of the contact assembly.

[0007] Optionally, the moving contact includes a leaf spring and a terminal block fixed in the housing, the leaf spring includes a fixed plate connected to the terminal block, a linkage plate linked to the shift rod, and a contact plate, and the contact plate is provided with a moving contact point that cooperates with the static contact.

[0008] Optionally, the shift rod includes a shift rod body horizontally arranged above the linkage plate, the shift rod body extends downward to form a linkage rod, the linkage rod is provided with a limit groove, the linkage plate is limited in the limit groove of the shift rod and is arranged at an oblique angle to the moving direction of the shift rod.

[0009] Optionally, the limiting groove has two limiting side walls located on both sides of the thickness direction of the linkage plate and a sliding bottom wall connected between the two limiting side walls. The two limiting side walls are arranged in parallel and at intervals and are arranged at an oblique angle to the moving direction of the shift rod. The side of the linkage plate facing the sliding bottom wall is provided with a sliding side edge that slides with the sliding bottom wall.

[0010] Optionally, the contact piece is an L-shaped structure, the opening of the contact piece faces the static contact and faces away from the linkage piece, one end of the contact piece provided with the moving contact is located below the static contact, and the other end is connected to the linkage piece.

[0011] Optionally, the fixing plate is a J-shaped structure, the straight end of the fixing plate is stacked and fixed to the wiring board, and the arcuate end of the fixing plate is confined in the arcuate groove of the shell and connected to the linkage plate.

[0012] Optionally, the shift rod includes a shift rod body, two ends of the shift rod spring are respectively connected to the housing and one side of the shift rod body, and the other side of the shift rod body extends to form a limiting rod for limiting cooperation with the blocking portion of the blocking rod.

[0013] Optionally, the moving direction of the shifting rod is the same as the elastic force direction of the shifting rod spring and is perpendicular to the moving direction of the blocking rod;

[0014] And / or, the shell is provided with a first sliding groove that slidably cooperates with the shift rod and a second sliding groove that cooperates with the blocking rod. The first sliding groove and the second sliding groove are connected through a connecting port corresponding to the limit rod, and the blocking part achieves limiting cooperation with the limit rod when blocking the connecting port.

[0015] Optionally, the contact assembly further includes a first wiring screw and a second wiring screw symmetrically arranged on both sides of the shell, the first wiring screw corresponds to the first wiring hole of the shell, and cooperates with the wiring board thread at one end of the moving contact for external wiring, the second wiring screw corresponds to the second wiring hole of the shell, and cooperates with the static contact thread for external wiring, the moving contact at the other end of the moving contact is located below the static contact; the shift rod is located above the moving contact and between the blocking rod and the shift rod spring.

[0016] A switch device comprising any one of the fault signal contact structures described.

[0017] The fault signal contact structure and switch device of the present invention are simple in structure, easy to assemble, simple in action relationship, and improve the accuracy and reliability of fault alarm.

[0018] In addition, the lever drives the moving contact by pulling the leaf spring to switch the open and closed states of the moving contact and the static contact. The leaf spring provides swing support for the moving contact and contact pressure with the static contact, reducing the contact support and contact spring and simplifying the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of the fault signal contact structure of the utility model in the initial state;

[0020] Figure 2 This is a three-dimensional diagram of the fault signal contact structure of the utility model in the initial state;

[0021] Figure 3 This is a front view of the fault signal contact structure of the utility model in the trigger state;

[0022] Figure 4 This is a three-dimensional diagram of the fault signal contact structure of the utility model in the trigger state;

[0023] Figure 5 This is a side view of the fault signal contact structure of the utility model;

[0024] Figure 6 This is a schematic structural diagram of the contact assembly of the utility model;

[0025] Figure 7 It is a structural diagram of the shift lever of the utility model;

[0026] Figure 8 It is a structural schematic diagram of the blocking rod of the utility model.

[0027] Shell 1; curved side wall 11; cylinder 12; first slide groove 13; abutting side wall 14; second slide groove 15; baffle 16; first wiring hole 17; second wiring hole 18; blocking rod 2; trigger rod 21; blocking portion 22; accommodating chamber 23; second limiting column 24; blocking rod spring 3; deflector rod 4; deflector rod body 41; accommodating groove 411; first limiting column 412; operating rod 42; linkage rod 43; limiting groove 44; limiting side wall 441; sliding bottom wall 442; limiting rod 45; deflector rod spring 5; moving contact 6; wiring board 61; leaf spring 62; fixing plate 621; linkage plate 622; sliding side 622a; contact plate 623; moving contact 63; static contact 7; first wiring screw 8; second wiring screw 9. DETAILED DESCRIPTION

[0028] The following embodiments are combined with the accompanying drawings to further illustrate the specific implementation of the fault signal contact structure and switch device of the present invention. The fault signal contact structure and switch device of the present invention are not limited to the description of the following embodiments.

[0029] The switchgear of this embodiment includes a fault signaling contact structure. When the switchgear trips due to a fault protection, the fault signaling contact structure indicates a fault and transmits an electrical signal. The switchgear of this embodiment is a circuit breaker, which typically includes an operating mechanism, a contact mechanism, and a protection mechanism. When a fault (such as undervoltage, overcurrent, or short circuit) occurs in the circuit breaker, the protection mechanism triggers the operating mechanism to trip, causing the contact mechanism to enter an open state, thereby implementing circuit breaker power-off protection. This is prior art and will not be further described here.

[0030] like Figure 1-Figure 5 As shown, the fault signal contact structure of this embodiment includes a housing 1, a blocking rod 2 installed in the housing 1, a deflector rod 4, a deflector rod spring 5 that provides elastic restoring force for the deflector rod 4, and a contact assembly. The contact assembly includes a matching moving contact 6 and a static contact 7. The blocking rod 2 and the deflector rod 4 are respectively movably arranged. The blocking rod 2 has a trigger rod 21 extending outside the housing 1, which is used to cooperate with the actuating mechanism of the switch device so that the actuating mechanism drives the trigger rod 21 when a fault occurs in the switch device. In particular, the blocking rod 2 and the deflector rod 4 are limitedly engaged, so that the deflector rod spring 5 is in an energy storage state, and the moving contact 6 is linked to the deflector rod 4. When the trigger rod 21 of the blocking rod 2 is triggered to move the blocking rod 2 to release the limited engagement with the deflector rod 4, the deflector rod spring 5 releases energy to drive the deflector rod 4 to move, so that the deflector rod 4 drives the moving contact 6 to switch the open and closed state of the contact assembly, thereby realizing that the fault signal contact structure transmits a fault signal. In this embodiment, the fault signal contact structure and switchgear are designed so that when a switchgear fault occurs, the blocking rod 2, triggered by the blocking rod 2, is released from its position limit with the shift rod 4, thereby releasing the shift rod spring 5, allowing the shift rod 4 to drive the moving contact 6, thereby switching the contact assembly between open and closed states to transmit a fault signal. This structure is simple, easy to assemble, and features a straightforward operational relationship, improving the accuracy and reliability of fault alarms. The actuating mechanism of the switchgear can be an operating mechanism or a protective mechanism of the switchgear, such as a latch in the operating mechanism of a circuit breaker, or an electromagnetic release as a protective mechanism.

[0031] like Figures 1-4 As shown, the contact assembly of this embodiment also includes first and second wiring screws 8 and 9 symmetrically arranged on either side of the housing 1. The first wiring screw 8 corresponds to the first wiring hole 17 of the housing 1 and is threadedly engaged with the terminal block 61 at one end of the movable contact 6 for external wiring. The second wiring screw 9 corresponds to the second wiring hole 18 of the housing 1 and is threadedly engaged with the stationary contact 7 for external wiring. The movable contact point 63 at the other end of the movable contact 6 is located below the stationary contact 7. The detent rod 4 is located above the movable contact 6 and between the blocking rod 2 and the detent rod spring 5. The fault signal contact structure has a compact layout, saving space and facilitating miniaturization.

[0032] like Figures 1-4 and Figure 6As shown, the movable contact 6 includes a leaf spring 62 and a terminal block 61 fixed within the housing 1. The leaf spring 62 includes a fixing piece 621 connected to the terminal block 61, a linkage piece 622 linked to the shift lever 4, and a contact piece 623. The contact piece 623 is provided with a movable contact 63 that cooperates with the stationary contact 7. The shift lever 4 pulls the leaf spring 62 to drive the movable contact 63 to switch the open and closed states of the movable contact 63 and the stationary contact 7. The leaf spring 62 provides swing support for the movable contact 63 and provides contact pressure with the stationary contact 7, eliminating contact supports and contact springs and simplifying the structure.

[0033] like Figure 2 、 Figure 6 and Figure 7 As shown, the linkage structure between the lever 4 and the leaf spring 62 of this embodiment includes a lever body 41 that is horizontally movable and disposed above a linkage piece 622. The lever body 41 extends upward to form an operating rod 42 that extends out of the housing 1. The lever body 41 extends downward to form a linkage rod 43. The linkage rod 43 of the leaf spring 62 is provided with a limiting groove 44. The linkage piece 622 is retained within the limiting groove 44 of the lever 4 and is disposed at an oblique angle to the direction of movement of the lever 4. By inserting the linkage piece 622 of the leaf spring 62 into the limiting groove 44 of the lever 4 at an oblique angle to the direction of movement of the lever 4, the translational movement of the lever 4 drives the leaf spring 62 to swing. This linkage structure is simple and stable and reliable.

[0034] Specifically, the limiting groove 44 has two limiting side walls 441 located on both sides of the thickness direction of the linkage piece 622 and a sliding bottom wall 442 connected between the two limiting side walls 441. The two limiting side walls 441 are arranged in parallel and at an angle to the moving direction of the shift rod 4. The side of the linkage piece 622 facing the sliding bottom wall 442 is provided with a sliding side edge 622a that slides with the sliding bottom wall 442.

[0035] like Figure 6 As shown, the contact piece 623 is an L-shaped structure, the opening of the contact piece 623 faces the static contact 7 and the back faces the linkage piece 622. One end of the contact piece 623 with the moving contact 63 is located below the static contact 7, and the other end is connected to one end of the linkage piece 622; the fixing piece 621 is a J-shaped structure, the straight end of the fixing piece 621 is stacked with the terminal block 61 and fixed by rivets, the arc-shaped end of the fixing piece 621 is limited to the arc-shaped groove of the housing 1 and is connected to the other end of the linkage piece 622. Specifically, as shown in FIG. Figure 2 and Figure 4 As shown, the housing 1 is provided with an arcuate side wall 11 and a cylinder 12 spaced apart from each other, and the arcuate groove is formed between the arcuate side wall 11 and the cylinder 12 .

[0036] like Figures 1-4As shown, the cooperation structure between the shift rod 4, the shift rod spring 5 and the blocking rod 2 of this embodiment, the two ends of the shift rod spring 5 are respectively connected to the shell 1 and one side of the shift rod body 41, and one side of the shift rod body 41 is provided with a receiving groove 411 that cooperates with the shift rod spring 5 and a first limiting column 412 located in the receiving groove 411, and the other side of the shift rod body 41 extends to form a limiting rod 45 for limiting cooperation with the blocking part 22 of the blocking rod 2.

[0037] Specifically, the housing 1 is provided with a first slot 13 that slidably engages with the deflector lever 4, and a second slot 15 that engages with the blocking lever 2. The first slot 13 and the second slot 15 are connected via a communication port corresponding to the limiting lever 45. When the blocking portion 22 blocks the communication port, it engages with the limiting lever 45. The sidewall of the first slot 13 of the housing 1 opposite the communication port serves as an abutment sidewall 14 for abutting the deflector lever spring 5. The deflector lever spring 5 is positioned within the first slot 13, with one end abutting the abutment sidewall 14 of the housing 1 and the other end resting within the receiving slot 411 of the deflector lever 4 and encased in the first limiting post 412.

[0038] Preferably, the movement direction of the lever 4 is the same as the direction of the elastic force of the lever spring 5 and is perpendicular to the movement direction of the blocking rod 2. Obviously, the movement direction of the lever 4 and the direction of the elastic force of the lever spring 5 can also be set at an oblique angle, and the movement direction of the lever 4 and the movement direction of the blocking rod 2 can also be set at other angles.

[0039] like Figure 2 、 Figure 4 and Figure 8 As shown, a blocking rod spring 3 is provided between the blocking rod 2 and the shell 1 to provide elastic restoring force for the blocking rod 2. The blocking rod 2 is provided with a accommodating cavity 23 for accommodating the blocking rod spring 3 and a second limiting column 24 on the side wall of the accommodating cavity 23. The shell 1 is provided with a baffle 16 that extends into the accommodating cavity 23 and is spaced opposite to the second limiting column 24. The blocking rod spring 3 is placed in the accommodating cavity 23, one end of which is sleeved on the second limiting column 24, and the other end abuts against the baffle 16.

[0040] The operation process of the fault signal contact structure of this embodiment is as follows: Figure 1 and Figure 2 As shown, in the initial state (i.e., the switching device has not triggered the blocking rod 2), the blocking rod spring 3 is in its original state, and the blocking portion 22 of the blocking rod 2 blocks the connecting port, i.e., the blocking portion 22 and the limiting rod 45 of the shift rod 4 are limitedly matched, so that the shift rod spring 5 is in a compressed energy storage state, and the moving contact 63 of the moving contact 6 and the static contact 7 are in a disconnected state.

[0041] like Figure 3 and Figure 4As shown, when a fault occurs in the switch device, the trigger rod 21 of the blocking rod 2 is triggered, causing the blocking rod 2 to move downward, the blocking rod spring 3 to store energy, and at the same time, the blocking portion 22 of the blocking rod 2 is removed from the connecting port. At this time, the shift rod spring 5 releases energy to drive the shift rod 4 to move to the left, and the limiting rod 45 of the shift rod 4 extends into the second sliding groove 15 through the connecting port. At the same time, the shift rod 4 pulls the leaf spring 62 of the moving contact 6 through the limiting groove 44, causing the contact piece 623 of the leaf spring 62 to swing upward, so that the moving contact 63 on the contact piece 623 and the static contact 7 enter a closed state.

[0042] It is worth mentioning that after the fault of the switch device is eliminated, the operating rod 42 of the lever 4 is toggled to the right to reset the fault signal contact structure to the initial state. An indicator mark for indicating the position of the operating rod 42 can be provided on the outside of the housing 1, and the fault indication function is realized by switching the position of the operating rod 42.

[0043] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are conventionally placed directions or positional relationships during use. They are intended solely for ease of description and do not imply that the devices or components referred to must have a specific direction. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and description and should not be construed as indicating relative importance.

[0044] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A fault signal contact structure, comprising a housing (1), a blocking rod (2) mounted in the housing (1), a shifting rod (4), a shifting rod spring (5) for providing elastic restoring force to the shifting rod (4), and a contact assembly, wherein the contact assembly comprises a matching moving contact (6) and a stationary contact (7), the blocking rod (2) and the shifting rod (4) being respectively movable, the blocking rod (2) having a triggering rod (21) extending out of the housing (1), and characterized in that: The blocking rod (2) and the shifting rod (4) are limitedly matched, so that the shifting rod spring (5) is in an energy storage state, and the movable contact (6) is linked to the shifting rod (4). When the triggering rod (21) of the blocking rod (2) is triggered to move the blocking rod (2) to release the limited matching with the shifting rod (4), the shifting rod spring (5) releases energy to drive the shifting rod (4) to move, so that the shifting rod (4) drives the movable contact (6) to switch the open and closed state of the contact assembly.

2. The fault signal contact structure according to claim 1, characterized in that: The movable contact (6) comprises a leaf spring (62) and a terminal block (61) fixed in the housing (1); the leaf spring (62) comprises a fixed piece (621) connected to the terminal block (61), a linkage piece (622) linked to the shifting rod (4), and a contact piece (623); the contact piece (623) is provided with a movable contact point (63) that cooperates with the static contact (7).

3. The fault signal contact structure according to claim 2, characterized in that: The shift lever (4) comprises a shift lever body (41) which is arranged above a linkage piece (622) for horizontal movement. The shift lever body (41) extends downward to form a linkage lever (43). A limiting groove (44) is provided on the linkage lever (43). The linkage piece (622) is limited in the limiting groove (44) of the shift lever (4) and is arranged at an oblique angle to the moving direction of the shift lever (4).

4. The fault signal contact structure according to claim 3, characterized in that: The limiting groove (44) comprises two limiting side walls (441) located on both sides of the linkage piece (622) in the thickness direction and a sliding bottom wall (442) connected between the two limiting side walls (441); the two limiting side walls (441) are arranged in parallel and spaced apart and are arranged at an oblique angle to the moving direction of the shifting rod (4); the side of the linkage piece (622) facing the sliding bottom wall (442) is provided with a sliding side edge (622a) that is slidably matched with the sliding bottom wall (442).

5. The fault signal contact structure according to claim 2, characterized in that: The contact piece (623) is an L-shaped structure, the opening of the contact piece (623) faces the static contact (7) and faces away from the linkage piece (622), and the contact piece (623) is provided with a moving contact (63) at one end located below the static contact (7), and the other end connected to the linkage piece (622).

6. The fault signal contact structure according to claim 2, characterized in that: The fixing plate (621) is a J-shaped structure, the straight end of the fixing plate (621) is stacked and fixed with the terminal block (61), and the arcuate end of the fixing plate (621) is located in the arcuate groove of the housing (1) and is connected to the linkage plate (622).

7. The fault signal contact structure according to claim 1, characterized in that: The shift lever (4) includes a shift lever body (41), two ends of the shift lever spring (5) are respectively connected to the housing (1) and one side of the shift lever body (41), and the other side of the shift lever body (41) extends to form a limiting rod (45) for limiting cooperation with the blocking portion (22) of the blocking rod (2).

8. The fault signal contact structure according to claim 7, characterized in that: The moving direction of the shifting rod (4) is the same as the elastic force direction of the shifting rod spring (5), and is perpendicular to the moving direction of the blocking rod (2); And / or, the housing (1) is provided with a first sliding groove (13) that slidably cooperates with the shifting rod (4) and a second sliding groove (15) that cooperates with the blocking rod (2); the first sliding groove (13) and the second sliding groove (15) are connected via a communication port corresponding to the limiting rod (45); and when the blocking portion (22) blocks the communication port, it achieves limiting cooperation with the limiting rod (45).

9. The fault signal contact structure according to claim 1, characterized in that: The contact assembly further comprises a first wiring screw (8) and a second wiring screw (9) symmetrically arranged on both sides of the housing (1); the first wiring screw (8) corresponds to the first wiring hole (17) of the housing (1) and is threadedly engaged with the wiring board (61) at one end of the moving contact (6) for external wiring; the second wiring screw (9) corresponds to the second wiring hole (18) of the housing (1) and is threadedly engaged with the static contact (7) for external wiring; the moving contact (63) at the other end of the moving contact (6) is located below the static contact (7); the shifting rod (4) is located above the moving contact (6) and between the blocking rod (2) and the shifting rod spring (5).

10. A switchgear, characterized in that: The invention comprises the fault signal contact structure according to any one of claims 1 to 9.

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